Current parsing code is building reverse-order integer, and then calls htonl()
to assign right value to "ts_recent" field of pcb.
This works correctly on little-endian machines, where htonl() reverses bytes.
However, on big-endian machines, htonl() is no-op, so bytes stay reversed.
This patch fixes it by building non-reversed integer.
AutoIP now selects a new address after rate limit timeout,
AutoIP tries a new address by incrementing the tried_llipaddr counter
in the ACD_DECLINE case of the callback.
In lwIP pre-2.2.0, address conflict detection was handled within autoip.c, and
the incrementing happened in autoip_restart() (line 150). When ACD was
extracted into a separate module in 2.2.0, this increment was missing for the
rate-limiting path.
Without this change, devices continuously retry the same IP address after rate
limiting, causing them to fail Bonjour Conformance Tests.
The TFTP app should not bind to the TFTP server port when configured as
a client. Instead, the local port should be chosen from the dynamic
range (49152 ~ 65535) so that if the application is stopped and started
again, the remote server will not consider the new packets as part of
the same context (which would cause an error since a new RRQ would be
unexpected).
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
FreeBSD support is basically just very small changes related to
some different includes and one define to not hide non-standard defines
like B115200.
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
[Problem]
When using makefsdata perl script to convert shtml files with SSI tags
the shtml files get generated with text/plain content type, making
browsers not render them correctly
[Solution]
Extend the regex to generate text/html content type for any of:
.htm, .html, .shtm, .shtml extensions
Add CodeQL Workflow for Code Security Analysis
This pull request introduces a CodeQL workflow to enhance the security analysis of our repository. CodeQL is a powerful static analysis tool that helps identify and mitigate security vulnerabilities in our codebase. By integrating this workflow into our GitHub Actions, we can proactively identify and address potential issues before they become security threats.
We added a new CodeQL workflow file (.github/workflows/codeql.yml) that
- Runs on every pull request (functionality to run on every push to main branches is included as a comment for convenience).
- Runs daily.
- Excludes queries with a high false positive rate or low-severity findings.
- Does not display results for git submodules, focusing only on our own codebase.
Testing:
To validate the functionality of this workflow, we have run several test scans on the codebase and reviewed the results. The workflow successfully compiles the project, identifies issues, and provides actionable insights while reducing noise by excluding certain queries and third-party code.
Deployment:
Once this pull request is merged, the CodeQL workflow will be active and automatically run on every push and pull request to the main branch. To view the results of these code scans, please follow these steps:
1. Under the repository name, click on the Security tab.
2. In the left sidebar, click Code scanning alerts.
Additional Information:
- You can further customize the workflow to adapt to your specific needs by modifying the workflow file.
- For more information on CodeQL and how to interpret its results, refer to the GitHub documentation and the CodeQL documentation (https://codeql.github.com/ and https://codeql.github.com/docs/).
Signed-off-by: Brian <bayuan@purdue.edu>
Add CodeQL Workflow for Code Security Analysis
This pull request introduces a CodeQL workflow to enhance the security analysis of our repository. CodeQL is a powerful static analysis tool that helps identify and mitigate security vulnerabilities in our codebase. By integrating this workflow into our GitHub Actions, we can proactively identify and address potential issues before they become security threats.
We added a new CodeQL workflow file (.github/workflows/codeql.yml) that
- Runs on every pull request (functionality to run on every push to main branches is included as a comment for convenience).
- Runs daily.
- Excludes queries with a high false positive rate or low-severity findings.
- Does not display results for git submodules, focusing only on our own codebase.
Testing:
To validate the functionality of this workflow, we have run several test scans on the codebase and reviewed the results. The workflow successfully compiles the project, identifies issues, and provides actionable insights while reducing noise by excluding certain queries and third-party code.
Deployment:
Once this pull request is merged, the CodeQL workflow will be active and automatically run on every push and pull request to the main branch. To view the results of these code scans, please follow these steps:
1. Under the repository name, click on the Security tab.
2. In the left sidebar, click Code scanning alerts.
Additional Information:
- You can further customize the workflow to adapt to your specific needs by modifying the workflow file.
- For more information on CodeQL and how to interpret its results, refer to the GitHub documentation and the CodeQL documentation (https://codeql.github.com/ and https://codeql.github.com/docs/).
Signed-off-by: Brian <bayuan@purdue.edu>
Add CodeQL Workflow for Code Security Analysis
This pull request introduces a CodeQL workflow to enhance the security analysis of our repository. CodeQL is a powerful static analysis tool that helps identify and mitigate security vulnerabilities in our codebase. By integrating this workflow into our GitHub Actions, we can proactively identify and address potential issues before they become security threats.
We added a new CodeQL workflow file (.github/workflows/codeql.yml) that
- Runs on every pull request (functionality to run on every push to main branches is included as a comment for convenience).
- Runs daily.
- Excludes queries with a high false positive rate or low-severity findings.
- Does not display results for git submodules, focusing only on our own codebase.
Testing:
To validate the functionality of this workflow, we have run several test scans on the codebase and reviewed the results. The workflow successfully compiles the project, identifies issues, and provides actionable insights while reducing noise by excluding certain queries and third-party code.
Deployment:
Once this pull request is merged, the CodeQL workflow will be active and automatically run on every push and pull request to the main branch. To view the results of these code scans, please follow these steps:
1. Under the repository name, click on the Security tab.
2. In the left sidebar, click Code scanning alerts.
Additional Information:
- You can further customize the workflow to adapt to your specific needs by modifying the workflow file.
- For more information on CodeQL and how to interpret its results, refer to the GitHub documentation and the CodeQL documentation (https://codeql.github.com/ and https://codeql.github.com/docs/).
Signed-off-by: Brian <bayuan@purdue.edu>
Add CodeQL Workflow for Code Security Analysis
This pull request introduces a CodeQL workflow to enhance the security analysis of our repository. CodeQL is a powerful static analysis tool that helps identify and mitigate security vulnerabilities in our codebase. By integrating this workflow into our GitHub Actions, we can proactively identify and address potential issues before they become security threats.
We added a new CodeQL workflow file (.github/workflows/codeql.yml) that
- Runs on every push and pull request to the main branch.
- Excludes queries with a high false positive rate or low-severity findings.
- Does not display results for third-party code, focusing only on our own codebase.
Testing:
To validate the functionality of this workflow, we have run several test scans on the codebase and reviewed the results. The workflow successfully compiles the project, identifies issues, and provides actionable insights while reducing noise by excluding certain queries and third-party code.
Deployment:
Once this pull request is merged, the CodeQL workflow will be active and automatically run on every push and pull request to the main branch. To view the results of these code scans, please follow these steps:
1. Under the repository name, click on the Security tab.
2. In the left sidebar, click Code scanning alerts.
Additional Information:
- You can further customize the workflow to adapt to your specific needs by modifying the workflow file.
- For more information on CodeQL and how to interpret its results, refer to the GitHub documentation and the CodeQL documentation.
Signed-off-by: Brian <bayuan@purdue.edu>
Fields sin6_len and sin_len are always used in the file but not all implementations of sockaddr_in or sockaddr_in6 have this fields (including Linux implementation).
Added #if-check to avoid compilation errors in such cases.
Defines EINVAL and ERANGE are used in the file but not included directly. When I try to use <sys/socket.h> and <arpa/inet.h> as LWIP_SOCKET_EXTERNAL_HEADERS it causes errors with this defines.
Update to cxong/tinydir version 1.2.6 commit 8124807 ("Fix buffer overflow in tinydir_file_open with long path names")
Although we're not affected of this bug, prevent others copying from our repo being affected...
if a pbuf received with the same seqno in ooseq ,
we then check the size and replace the existing one
with the larger one,but if the existing one is the
last segment in ooseq ,it might has been trimed before.
the replacing action will overrun our receive windows
see patch #10106 and bug #56397
Allow one to provide a custom implementation of free/malloc/calloc
instead of the lwip internal allocator. The code to use the libc's
implementation already existed, so generalize the existing code and make
the libc variant a specialized case of this new capability, retaining
full backwards compatibility.
commit 4e6dd9 "ping: add stop function", was corrected
and wrongly added stop function after IP address set up.
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
[build] ../../3rd/lwip/src/include/lwip/opt.h:137:41: error: argument 2 null where non-null expected [-Werror=nonnull]
[build] #define MEMCPY(dst,src,len) memcpy(dst,src,len)
[build] ^~~~~~~~~~~~~~~~~~~
[build] ../../3rd/lwip/src/netif/ppp/fsm.c:791:7: note: in expansion of macro 'MEMCPY'
[build] MEMCPY(outp + PPP_HDRLEN + HEADERLEN, data, datalen);
[build] ^~~~~~
[build] In file included from c:\mentorgraphics\fly380s_8910\prebuilts\win32\gcc-arm-none-eabi\arm-none-eabi\include\sys\time.h:40:0,
[build] from ../../3rd/../src/cat1/arch/cc.h:40,
[build] from ../../3rd/lwip/src/include/lwip/arch.h:50,
[build] from ../../3rd/lwip/src/include/lwip/debug.h:40,
[build] from ../../3rd/lwip/src/include/lwip/opt.h:52,
[build] from ../../3rd/lwip/src/include/netif/ppp/ppp_opts.h:31,
[build] from ../../3rd/lwip/src/netif/ppp/fsm.c:43:
[build] c:\mentorgraphics\fly380s_8910\prebuilts\win32\gcc-arm-none-eabi\arm-none-eabi\include\string.h:31:8: note: in a call to function 'memcpy' declared here
[build] _PTR _EXFUN(memcpy,(_PTR __restrict, const _PTR __restrict, size_t));
[build] ^
lwIP might support different hardware address lengths (when using
Ethernet and 6LoWPAN for instance). Match provided lladdr length
from Router Advertisement to the current network interface instead
of comparing against longest that can be stored.
ping in raw mode does some set up and sets timeout, but clean
up procedure is missing. That is needed for case if PING_RESULT() macro
is used for application exit.
Also implement stop functionality when using sockets.
Running ping is stopped when calling ping_init() again.
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
By default, npcap keeps its DLLs not in system32 but in system32/npcap.
To load DLLs from there, mark them as "delay load DLLs" and adjust the
DLL search path before using/loading them.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Although ntohs and htons perform equivalent operations (a byte swap on
little-endian platforms), their semantic roles (as implied by the names)
are different.
In fuzz_common.c, we get integers from simulated network packages, and
convert them for host CPU use, so ntohs is the right variant to use.
Unfortunately, CC ?= afl-gcc doesn't work. This is because CC has a
default value (of "cc"), and the ?= operator only assigns a value if the
variable previously had none. "make" currently compiles with cc.
In this patch, I implemented the more elaborate way to achieve what was
probably intended: "make" will use afl-gcc now, and "make CC=foo" will
compile with "foo".
If the hostname is not set in the DISCOVER packet, then some servers might
issue an OFFER with hostname configured and consequently reject the REQUEST
with any other hostname.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Co-Authored-By: Simon Goldschmidt <goldsimon@gmx.de>
Enables to configure:
* DHCP_COARSE_TIMER_SECS
* if DHCP_DEFINE_CUSTOM_TIMEOUTS defined these addtional options are
available:
- DHCP_CALC_TIMEOUT_FROM_OFFERED_T0_LEASE to adjust the t0 lease timeout from the offered value
- DHCP_CALC_TIMEOUT_FROM_OFFERED_T1_RENEW same for t1 renew
- DHCP_CALC_TIMEOUT_FROM_OFFERED_T2_REBIND same for t2 rebind
- DHCP_NEXT_TIMEOUT_THRESHOLD to adjust the period of the next timeout
- DHCP_REQUEST_BACKOFF_SEQUENCE to adjust back-off times based on DHCP
request attempts
Also updates timeout type from u16 to u32 - eps useful when DHCP_COARSE_TIMER_SECS is a smaller number
Reproducer (in bash):
base64 -d <<< "H4sIAP/9L2QCA+3WoQ2AMBSE4QoCTFHBBJfgSRF4RDfpRmgmYBpGQRBCk4ZiSfk/+fJMK+5dZRVpzSQzSs6oPierDV4y87WxLQLwE42SfNCdDyHJB9/xZwAARPbMJbUq4JJmu4JVT1cAAACfbGIqoqcMzy90eu+aBw2+N28WFgAA" | gunzip | test/fuzz/lwip_fuzz2
Crash log:
../../src/core/altcp_tcp.c:178:13: runtime error: member access within null pointer of type 'struct tcp_pcb'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../src/core/altcp_tcp.c:178:13 in
AddressSanitizer:DEADLYSIGNAL
=================================================================
==192415==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000048 (pc 0x557065081703 bp 0x0aae0cb71204 sp 0x7ffd034dabc0 T0)
==192415==The signal is caused by a READ memory access.
==192415==Hint: address points to the zero page.
#0 0x557065081703 in altcp_tcp_setup_callbacks /.../lwip/test/fuzz/../../src/core/altcp_tcp.c:178:19
#1 0x55706508206f in altcp_tcp_setup /.../lwip/test/fuzz/../../src/core/altcp_tcp.c:189:3
#2 0x55706508206f in altcp_tcp_accept /.../lwip/test/fuzz/../../src/core/altcp_tcp.c:84:5
#3 0x557065095592 in tcp_input /.../lwip/test/fuzz/../../src/core/tcp_in.c:380:9
#4 0x5570650e752f in ip4_input /.../lwip/test/fuzz/../../src/core/ipv4/ip4.c:743:9
#5 0x55706513d4de in ethernet_input /.../lwip/test/fuzz/../../src/netif/ethernet.c:186:9
#6 0x557064fe0959 in input_pkt /.../lwip/test/fuzz/fuzz_common.c:209:9
#7 0x557064fdeb6a in input_pkts /.../lwip/test/fuzz/fuzz_common.c:257:9
#8 0x557064fdeb6a in lwip_fuzztest /.../lwip/test/fuzz/fuzz_common.c:669:3
#9 0x7ff4f578e189 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#10 0x7ff4f578e244 in __libc_start_main csu/../csu/libc-start.c:381:3
#11 0x557064f20420 in _start (/.../lwip/test/fuzz/lwip_fuzz2+0x81420) (BuildId: 8680a96430d5749c90111fe9c3a3d4f881a5dbcd)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /.../lwip/test/fuzz/../../src/core/altcp_tcp.c:178:19 in altcp_tcp_setup_callbacks
==192415==ABORTING
Aborted
A fuzzer may generate big packets, and it will interpret assertion
failures as bugs. Instead of asserting that the packet size is
reasonable, simply skip the packet when it's not the case.
- wpcap/packet libraries were wrong (.a, not .lib; not the x64 ones)
- link order resulted in undefined references
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
When using multiple netifs on one hardware interface (e.g. when mapping multiple IP addresses to one hardware interface), if the netif's low-level receive routine cannot decide for the correct netif, here the `netif` parameter may be a default netif, in this case, `p-> if_idx` will get a wrong netif index value. It should be placed after `netif = LWIP_ARP_FILTER_NETIF_FN(p, netif, lwip_htons(type));`. Filter function can returns the correct netif before assigning `p-> if_idx`.
warning: Tag 'PERL_PATH' at line 2212 of file '/home/runner/work/lwip/lwip/doc/doxygen/lwip.Doxyfile' has become obsolete.
To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
warning: Tag 'MSCGEN_PATH' at line 2234 of file '/home/runner/work/lwip/lwip/doc/doxygen/lwip.Doxyfile' has become obsolete.
To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
This fixes downloads longer than 15 seconds.
See bug #60787 (http_client does not reset timeout counter)
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Update to cxong/tinydir commit 97a6032ddb ("Fix tinydir_file_open for root or subfolder of root in Linux.")
This should fix bug #61106 (compiling newest source fails with "-O3" optims)
When a registered netif ext-callback unregisters itself when being
called (e.g. because some state is reached by this event), the invoke
iteration might access uninitialized memory or at least stop the
iteration (because next is set to null).
Fix his by caching the next pointer during iteration before calling
callbacks.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
It turns out the crash only occurs if LWIP_DEBUG is enabled. If the
parameter dest is NULL the function tries to find a route using the
destination address of the packet instead. If this fails as well a
debug message is printed but it is still using dest causing a NULL
pointer dereference and crash at src/core/ipv6/ip6.c line 1312.
[erik@kryo.se: Apply fix to ip6_output_hinted as well]
This patch adds a few entries in .gitattributes to specify files that
should never end up in a distribution tarball.
Signed-off-by: Hu Keping <hukeping@huawei.com>
This simple patch causes tcp_listen() to inherit the netbuf_idx setting
of the original pcb. Without this, it is not possible to restrict a
socket to a specific interface using SO_BINDTODEVICE before listening.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Usage of fail_if/fail_unless macros with a message results in a
warning with the latest version of check (0.15.2+) and GCC.
Ignore this specific error (since warnings are treated as errors) for now.
Example failure:
In file included from ../../../../src/../test/unit/lwip_check.h:7,
from ../../../../src/../test/unit/lwip_unittests.c:1:
../../../../src/../test/unit/lwip_unittests.c: In function ‘lwip_check_ensure_no_alloc’:
../../../../src/../test/unit/lwip_unittests.c:55:7: error: too many arguments for format [-Werror=format-extra-args]
55 | "mem heap still has %d bytes allocated", lwip_stats.mem.used);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../src/../test/unit/ip4/test_ip4.c: In function ‘test_ip4_icmp_replylen_short’:
../../../../src/../test/unit/ip4/test_ip4.c:291:35: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
fail_unless(linkoutput_byte_ctr == icmp_len + sizeof(unknown_proto));
Plus minor cleanup in second icmp reply test
It used to fail with this error after building the depfiles:
clang -DLWIP_NOASSERT_ON_ERROR -I/usr/include/check -I../../../../src/../test/unit -Wno-gnu-zero-variadic-macro-arguments -g -DLWIP_DEBUG -Wall -pedantic -Werror -Wparentheses -Wsequence-point -Wswitch-default -Wextra -Wundef -Wshadow -Wpointer-arith -Wcast-qual -Wc++-compat -Wwrite-strings -Wold-style-definition -Wcast-align -Wmissing-prototypes -Wredundant-decls -Wnested-externs -Wunreachable-code -Wuninitialized -Wmissing-prototypes -Wredundant-decls -Waggregate-return -Wlogical-not-parentheses -fsanitize=address -fsanitize=undefined -fno-sanitize=alignment -Wdocumentation -Wno-documentation-deprecated-sync -I. -I../../.. -I../../../../src/include -I../../../ports/unix/port/include -c
clang-11: error: no input files
Also don't include depfiles while cleaning, to avoid generating them
just to remove them.
Having just one depfile (.depend) means it has to be fully regenerated
on every change, and it can't be done in parallel.
After this change the rebuild time after touching a single test file has
gone from 5.0 to 0.9 seconds. (make -j12)
Build of tests from clean has gone from 8.1 to 5.5s.
We could go even further and have one depfile per c-file, but this felt
like a simple first step giving a nice improvement.
To fix the build after ppp_output_cb started taking it as const in
commit b2d1fc119d.
Fixes this failure:
../contrib/examples/ppp/pppos_example.c: In function ‘ppp_output_cb’:
../contrib/examples/ppp/pppos_example.c:163:29: error: cast discards ‘const’ qualifier from pointer target type [-Werror=cast-qual]
return sio_write(ppp_sio, (u8_t*)data, len);
^
Authentication timer might still be running when entering network phase
for any necessary rechallenge, mostly for PPP server support.
Update the detailed analysis of simultaneously running PPP timers
taking into account the authentication timer that might still be
running and chose to increase the base number to 2 instead of
adding more unnecessary complexity.
upap_timeout is not currently stopped on authentication success or
fail events. This may have strange results if session is restarted
in a high pace because even if the timeout callback have a sanity
check against the PAP state the session can be restarted and be
back in the valid state before the timeout callback is actually
called.
Do not assume LWIP_RAND will return 32 bits of randomness because it is
probably going to be defined to directly return the rand() value. For
example, LCP magic numbers are 32-bit random values.
This is already what we inherently have always done for IPv4/IPv6
packets, so it works. Receivers must handle both cases anyway because
both behaviors are seen in the wild.
A previous call to ppp_input might have disconnected the session while
there were still packets in flight in the tcpip mailbox. Drop incoming
packets because ppp_input must never be called if the upper layer is
down.
Speed-up a little bit the PPPoS input parser by only checking the open
flag after calling the ppp_input function, the only one that can induce
a state change here.
ppp_set_* functions that set the PPP session parameters must only be
called when the session is in a dead state (i.e. disconnected),
otherwise not fatal but surprising results may happen.
This function call the notify phase callback that should be called from
the lwIP core thread. This is especially true if the user callback
is not designed to be reentrant.
There is no good reason why this function should take a non-const
pointer, as the output callback should never modify what lwIP gives it.
While changing that also switch to a more generic `void*` instead of
"byte".
There is no good reason why this function should take a non-const
pointer. While changing that also switch to a more generic `void*`
instead of "byte".
There is no good reason why this function should take a non-const
pointer. While changing that also switch to a more generic `void*`
instead of "byte".
We do not have equivalents in PPPAPI for ppp_set_* functions because
calling them only makes sense while session is disconnected, furthermore
they are only setting structure members of the session configuration.
We only have to reserve header space for forwarding for IPv4 and IPv6
packets, all other packets are PPP control packets. Doing so reduce
the need of having to coalesce the PBUF chain before PPP processes
control packets.
PPP peer can negotiate its MRU, therefore we don't know the MTU we are
going to use before starting PPP. This is an issue because netif_add
function assume that the netif init callback function will set the MTU,
netif_add will then copy mtu to mtu6. We have then to update mtu6 each
time we update mtu to keep them in sync. Doing so is fine because PPP
netif MTU is only updated when the netif is in link down state.
Our current HDLC decoder does not protect against starving the Rx
PBUF POOL for one packet, most likely due to received garbage on
the serial port.
Prevent starving the Rx pool by checking incoming packets length
against PPP_MRU with a 10% margin because we only want to avoid
filling all PBUFs with garbage, we don't have to be pedantic.
Fixes bug #58441: Invalid PPP data accumulates forever.
PPP_MRU is now free to be used for what it should have been. Now using
it at PPP init stage to set the wanted MRU value, triggering a MRU
negotiation at the LCP phase.
I doubt anyone needs it anyway, but, well, at least it is fixed and the
MRU/MTU config mess is cleaned.
And while we are at it, better document PPP MRU config values.
RFC1661 mandates that default MRU value, that must be used prior
negotiation of MRU value and if MRU value is not negotiated later, must
be 1500.
That is, any PPP host must accept control frames of at least 1500 when
the PPP session start (there are no way to split them in multiples
frames anyway) and must use a value of 1500 if MRU is no negotiated
during LCP exchanges.
Therefore, having it configurable in ppp_opts is a mistake. It was wrong
and never worked because changing the value never triggered a MRU value
negotiation because it changed both the wanted MRU value and the RFC
default value to which the wanted value is compared to trigger a MRU
negotiation if values are not equal.
Those are private functions, using the netif_ prefix here is not really
nice, especially with functions named netif_set_mtu and netif_get_mtu
for obvious reasons.
We currently retry indefinitely if sending packets fails, for example
if the output interface is down. We are even doing it if we are in
a middle of a connection process. This is not a very nice behavior
because PPP low level will retry indefinitely to connect and the user
application will never be warned that something is wrong.
We have the persist boolean in PPP settings to achieve more or less
the same thing anyway. Except it does it better at only retrying
indefinitely the initiation packet.
Having it configurable does not really make sense anymore, we already
need PBUF_RAM in all transmit paths. There are no real reason to keep
allocating PPP response buffers from the PBUF_POOL which should be now
reserved for receive paths only.
We need PBUF_RAM for quite a while for PPP, e.g. through pbuf_coalesce
and for all PPP transmit paths. There are no real reason to keep
allocating packets from PBUF_POOL for PPP control packets transmit path
by default today.
When pbuf_coalesce fails it does nothing and returns the previous buffer
chain. Adds checks that pbuf_coalesce succeeded, otherwise drop incoming
packet.
If we fail to receive a full packet, for exemple if a memory allocation
fail for some reason, we currently do not wait for next packet flag
character and we start filling a new packet at next received byte. Then
we expect the checksum check to discard the packet.
The behavior seem to have been broken one or two decades ago when adding
support for PFC (Protocol-Field-Compression) and ACFC
(Address-and-Control-Field-Compression).
Rework to drop any character until we receive a flag character at init
and when we drop a packet before it is complete.
VJ support is known to be broken when built with some compiler
optimizations enabled, disabling it by default until someone needs it
and fixes it.
It was mostly used with dial-up modems, it is useless with PPPoE and
PPPoL2TP and is probably useless as well with cellular modems, so
disabling it by default makes sense anyway.
In theory, if provided username or password is over 0x80000000 byte long
(err...), casts to signed integer of strlen() return values is going to
return negative values breaking lengths checks.
Fix it by only using unsigned integer or size_t (guaranteed to be
unsigned) comparisons.
Generating docs for file src/incl/home/travis/build/lwip-tcpip/lwip/src/include/lwip/ip4_addr.h:151:s
error: unable to resolve reference to `ip4_addr_eq' for \ref command (warning treated as error, aborting now)
Like pbuf_copy, but can copy part of a pbuf to an offset in another.
pbuf_copy now uses this function internally.
Replace pbuf_take_at loop in icmp6 with pbuf_copy_partial_pbuf().
../../../../src/../test/unit/ip6/test_ip6.c: In function ‘test_ip6_dest_unreachable_chained_pbuf’:
../../../../src/../test/unit/ip6/test_ip6.c:314:16: error: ‘main’ is usually a function [-Werror=main]
struct pbuf *main = pbuf_alloc(PBUF_RAW, sizeof(udp_hdr), PBUF_ROM);
^~~~
cc1: all warnings being treated as errors
With the payload lengths not matching between source and destination.
Also remove redundant allocation check in other test, it is now done
in the test setup code.
Fixes bug #58553, and the newly added unit test.
The pbuf_take_at loop should probably be made into a pbuf library
function, which would avoid this mistake in the future and provide
a simpler implementation of pbuf_copy.
When using LWIP_RAND_FOR_FUZZ_SIMULATE_GLIBC:
fuzz_common.c: In function ‘lwip_fuzz_rand’:
fuzz_common.c:683:11: error: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Werror=sign-compare]
683 | if (idx >= sizeof(rand_nrs)/sizeof((rand_nrs)[0])) {
| ^~
cc1: all warnings being treated as errors
User application code should be responsible to call netif_set_up() but
let's not break compatibility for now.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
NETIF_FLAG_UP flag is not supposed to be set by netif init callback
anymore, call netif_set_up() instead.
Sure it would be better to let user application code call netif_set_up()
by itself as it is now meant to be but let's not break compatibility for
now and add a FIXME for next release with allowed behavior break.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Building PPP CCP support without adding any compressor support serve
no real use case. Forbid doing so instead of bloating the code with
more ifdef.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
This reverts commit 6e7ea92d56.
We better forbid building configurations that does not make sense instead
of bloating the code with more ifdef. Here building CCP support without
adding any compressor support serve no real use case.
Fuzz tests need reproducible code, so we need an "unsafe" version of
LWIP_RAND() in this case...
Also, to reproduce fuzz tests cases from Linux on Windows,
LWIP_RAND_FOR_FUZZ_SIMULATE_GLIBC provides the first 20 random numbers that
glibc would have...
Any malicous segment could contain a SYN up to now (no check).
A SYN in the wrong segment could break OOSEQ queueing.
Fix this by allowing SYN only in states where it is required.
See bug #56397: Assert "tcp_receive: ooseq tcplen > rcv_wnd"
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This uses VirtualAlloc/VirtualProtect on windows to simulate RX buffers
that are readonly to lwIP (see task #14807).
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This adds some basic checks to the subroutines of eap_input to check
that we have requested or agreed to doing EAP authentication before
doing any processing on the received packet. The motivation is to
make it harder for a malicious peer to disrupt the operation of pppd
by sending unsolicited EAP packets. Note that eap_success() already
has a check that the EAP client state is reasonable, and does nothing
(apart from possibly printing a debug message) if not.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Sylvain Rochet <gradator@gradator.net> (ported to lwIP PPP pcb struct)
Given that we have just checked vallen < len, it can never be the case
that vallen >= len + sizeof(rhostname). This fixes the check so we
actually avoid overflowing the rhostname array.
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Sylvain Rochet <gradator@gradator.net> (compiler warning fix about int vs uint comparisons)
When we have multiple netifs where at least one has checksum offloading
capabilities, IP forwarding needs to set various checksum fields to 0
to prevent HW algorithms on calculating an invalid checksum.
-> set checksum fields of IP/UDP/TCP/ICMP to 0 in ip4_forward().
See bug #56288
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This is just to keep the code clean and prevent using the "echo" header
where any ICMP header is meant.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
See bug #57445. Short version of the description there: lwip_select() failed
to decrement 'select_waiting' of a socket since that code part failed on
'free_pending' sockets. However, the code does not have to check that as it
has marked the socket to be in use itself earlier.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Use 'PBUF_IP_HLEN+PBUF_TRANSPORT_HLEN' instead of '40' to calculate
PBUF_POOL_BUFSIZE (the size of each PBUF_POOL buffer) since the former
can be 60 when IPv6 is enabled.
See bug #56355
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This converts all ppp_*() debug functions to ppp_*(()) macros that
ensure the code is left out by the linker if the corresponding debug
setting is disabled.
Downside is that many lines of code are touched, but since these
already differ to upstream PPP sources, I figured that's ok...
See bug #55199
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
In order to reuse the debug-enable checks for PPP debug macros,
move the flag and level checks from LWIP_DEBUGF to a new macro
that can be used elsewhere.
First calculate and sum TLS overhead when altcp_mbedtls_write() is called.
Then take care of it when calling application sent callback. Give reveived
len from inner_conn, minus calculated overhead.
According to mbedTLS source code and documentation, calls to
`mbedtls_ssl_conf_session_cache` and `mbedtls_ssl_conf_session_tickets_cb`
are only available if mbedTLS is configured for server mode (ie. MBEDTLS_SSL_SRV_C
is defined). This cannot be used on client mode to resume a previous session.
To allow session reuse in client mode, application must save session parameters
(including tickets provided by the server if any) after successfull connection
and restore them before attemting to reconnect. Since `alctp_close()` free the
structure, it cannot be used to store the required information.
So, two new API were added, directly wrapped to mbedTLS functions, allow application
to do that by itself.
Also added full declaration of `struct altcp_tls_session` in altcp_tls.h to allow
easier usage in application when using mbedTLS port.
In some noisy WiFi environment, it may be necessary to increase this value to
300ms to accomodate WiFi latencies which may result in less than the required
250ms between two probe frames received by the Apple BCT application.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
- Count tiebreaking loss in num_conflicts to include them in rate limit detection
- Restart probing using mdns_resp_restart allowing rate limiting for those cases
This ensure rate limiting is well activated during Apple Bonjour Conformance Tests.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This allow Apple Bonjour Conformance Test to not fail with the following tests:
- DISTRIBUTED DUPLICATE SUPPRESSION
- MULTIPLE QUESTIONS - DISTRIBUTED DUPLICATE SUPPRESSION
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
TXT records isn't required to be unique in network, so it shouldn't be
included in probe packets.
Additionnaly, when TXT record is present, the Bonjour Conformance Test
from Apple Inc. always fail because generated probe nevert have TXT record.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Called with `MDNS_INITIAL_PROBE_DELAY_MS` or `MDNS_PROBE_DELAY_MS` according to
needs.
When `mdns_resp_restart_delay()` called by `mdns_resp_rename_(netif|service)()`
functions, it is assumed this is because a conflict. So we should not use
`MDNS_INITIAL_PROBE_DELAY_MS` because the Bonjour Conformance Test will
complain like this:
```
START (PROBING)
NOTICE 16:40:09.501911: conflicting probe:
smarTrEMotE-f8d0a4.Local.
ERROR 16:40:09.607288: Device did not provide a sufficient time gap between receiving a conflicting probe and reprobing.
ERROR 16:40:09.607333: expected_time_gap=237,actual_time_gap=105
```
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
- Send service slot index to the mdns result function. In case of conflict, the user
will have to remove the service or rename it.
- Break after hostname conflict in order to managed it first, and managed service name
conflict after.
- Provide a function to get the TXT userdata for a service (allowing app to match with
its own data).
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
When more than one service (just 2) need to be probed for conflict, generation
of the probe packet fail because pbuf is too small!
So OUTPACKET_SIZE renamed to MDNS_OUTPUT_PACKET_SIZE and moved to mdns_opts.h
to allow configuration. Default configuration raise it to 1450 to have enough
space when MDNS_MAX_SERVICES > 1 else it remain 512.
Extract from RFC 6762, chapter 17, Multicast DNS Message Size:
The 1987 DNS specification [RFC1035] restricts DNS messages carried
by UDP to no more than 512 bytes (not counting the IP or UDP
headers). For UDP packets carried over the wide-area Internet in
1987, this was appropriate. For link-local multicast packets on
today's networks, there is no reason to retain this restriction.
Given that the packets are by definition link-local, there are no
Path MTU issues to consider.
Multicast DNS messages carried by UDP may be up to the IP MTU of the
physical interface, less the space required for the IP header (20
bytes for IPv4; 40 bytes for IPv6) and the UDP header (8 bytes).
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
sys_arch_mbox_tryfetch() shall return SYS_MBOX_EMPTY or 0 according
to the documentation. Wherever the function is used the return
value is incorrectly compared to SYS_ARCH_TIMEOUT. For now
SYS_MBOX_EMPTY is defined to SYS_ARCH_TIMEOUT so this is not an
issue as long as SYS_MBOX_EMPTY isn't re-defined.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
As written in RFC5227 in 2.1.1 Probe Details:
A host implementing this specification MUST take precautions to limit
the rate at which it probes for new candidate addresses: if the host
experiences MAX_CONFLICTS or more address conflicts on a given
interface, then the host MUST limit the rate at which it probes for
new addresses on this interface to no more than one attempted new
address per RATE_LIMIT_INTERVAL.
But `acd_restart` restart function check for `acd->num_conflicts > MAX_CONFLICTS`
which allow one more probe than expected.
So this commit change the test to `acd->num_conflicts >= MAX_CONFLICTS`.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
* Socket functions definitions moved out of the
#define LWIP_SOCKET_EXTERNAL_HEADERS as all users who
set LWIP_SOCKETS to 1 will need them regardless they use
lwip's or external socket headers.
* Include lwip/inet.h in some unit tests and apps
* Since they use htons() and pals.
* test/unit/api/test_sockets.c:
* write() could be declared by external socket headers
* Call lwip_write() instead.
* Code expects fcntl() to return 6
* But O_RDWR could have another value if external
socket headers are present
* Replace 6 by O_RDWR.
* apps/tftp/tftp.c:
* recv() could be declared by external socket headers
* Rename it to tftp_recv()
* Lwip declares msghdr->msg_iovlen as int, but when
using external socket headers, some systems declare
msg_iovlen as size_t or others.
* This patch creates a new type msg_iovlen_t and
expects users to typedef it to the type they need
for their system.
Lwip's struct sockaddr includes sa_len, but some systems
like Linux doesn't have this filed, which produces many
compilation problems when using external headers.
A set of macros has benn added to detect the absence of
sa_len and adapt sockets.c
* LWIP_MARK_TCPIP_THREAD moved to include/lwip/sys.h
* Unix port macro definitions moved to sys_arch.h
* LWIP_MARK_TCPIP_THREAD
* LOCK_TCPIP_CORE
* UNLOCK_TCPIP_CORE
(goldsimon@gmx.de: fixed unix Makefile build and win32 build)
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
In timeouts.c commit 7d1c26cc0c replaced
timeout for AUTOIP with a timeout for ACD, however the value of
LWIP_NUM_SYS_TIMEOUT_INTERNAL was not updated and still counts
LWIP_AUTOIP instead of LWIP_ACD. If user has AUTOIP disabled (or not
explicitly enabled) and DHCP enabled, then ACD gets automatically
enabled too. In this case there will be one timeout too little for lwIP
and first TCP packet received causes an assertion.
Also add LWIP_IPV6_DHCP6 to the value of LWIP_NUM_SYS_TIMEOUT_INTERNAL,
as it was also not accounted for.
This reuses the member 'int socket' by making it a union containing
both int and void pointer.
See bug #56593.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Suggested-by: Wilfred <wilfrednilsen@hotmail.com>
The err field is removed from struct lwip_sock since commit e0a2472706
("netconn/sockets: remove fatal error handling, fix asynchronous error handling, ensure data before RST can be received")
sock_set_errno() simply calls set_errno() now, so use set_errno() instead.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Dirk Ziegelmeier <dziegelmeier@de.pepperl-fuchs.com>
If client reception buffer is bigger than the first frame we receive, the first packet test
will always fail for the second one if it is shorter the the diffence between reception
buffer size and first frame length.
For example, if we receive a PUBLISH message with length = 1517 (payload len = 1514 +
header len = 3), this result in total message length of 1517.
altcp_tls will send MQTT client frame up to 1516 bytes max. This result to PUBLISH
message splitted in two frame: first is 1516 bytes, the second of 1 bytes.
If MQTT_VAR_HEADER_BUFFER_LEN is 1520 (1516 + 4 bytes for stored fixed header), the
second frame of 1 bytes is considered as first publish frame because
client->msg_idx (1517) < MQTT_VAR_HEADER_BUFFER_LEN (1520).
This result in disconnection AND application callback never called for the end of the
payload.
The fix will check `(client->msg_idx - (fixed_hdr_len + length)) == 0` which can be
only true for the first frame of a message.
Below logs showing the bug:
```
April 3rd 2019, 23:14:05.459 lwip_dbg mqtt_parse_incoming: Remaining length after fixed header: 1514
April 3rd 2019, 23:14:05.460 lwip_dbg mqtt_parse_incoming: msg_idx: 1516, cpy_len: 1513, remaining 1
April 3rd 2019, 23:14:05.460 lwip_dbg mqtt_incomming_publish: Received message with QoS 1 at topic: v2/inte...
April 3rd 2019, 23:14:05.461 lwip_dbg mqtt_parse_incoming: Remaining length after fixed header: 1514
April 3rd 2019, 23:14:05.461 lwip_dbg mqtt_parse_incoming: msg_idx: 1517, cpy_len: 1, remaining 0
April 3rd 2019, 23:14:05.461 lwip_dbg mqtt_message_received: Received short PUBLISH packet
```
When using the MEMP_MEM_MALLOC option, memp_malloc() can not be relied on to
limit the number of allocations allowed for each MEMP queue, as the ND6 code
had been. This caused the ND6 queue to keep growing until the heap allocation
failed when using the MEMP_MEM_MALLOC option. So add an explicit queue size
check in ND6.
Replace '\n' with '<br>', as this allows doxygen to understand reference
names followed by newline. For some cases just drop the newline if it's
not required.
Doxygen 1.8.15 doesn't like if the name of reference is followed by
anything else than (selected?) punctuation or whitespace.
bug #56004
According to rfc5681:
https://tools.ietf.org/html/rfc5681
Paragraph 3.2. Fast Retransmit/Fast Recovery
The TCP sender SHOULD use the "fast retransmit" algorithm to detect
and repair loss, based on incoming duplicate ACKs. The fast
retransmit algorithm uses the arrival of 3 duplicate ACKs (as defined
in section 2, without any intervening ACKs which move SND.UNA) as an
indication that a segment has been lost. After receiving 3 duplicate
ACKs, TCP performs a retransmission of what appears to be the missing
segment, without waiting for the retransmission timer to expire.
Now consider the following scenario:
Server sends packets to client P0, P1, P2 .. PK.
Client sends packets to server P`0 P`1 ... P`k.
I.e. it is a pipelined conversation. Now lets assume that P1 is lost, Client will
send an empty "duplicate" ack upon receive of P2, P3... In addition client will
also send a new packet with "Client Data", P`0 P`1 .. e.t.c. according to sever receive
window and client congestion window.
Current implementation resets "duplicate" ack count upon receive of packets from client
that holds new data. This in turn prevents server from fast recovery upon 3-duplicate acks
receive.
This is not required as in this case "sender unacknowledged window" is not moving.
Signed-off-by: Solganik Alexander <sashas@lightbitslabs.com>
Two new API:
err_t mdns_search_service(const char *name, const char *service, enum mdns_sd_proto proto,
struct netif *netif, search_result_fn_t result_fn, void *arg,
s8_t *request_id);
void mdns_search_stop(s8_t request_id);
One compilation flags:
LWIP_MDNS_SEARCH
One options flags:
MDNS_MAX_REQUESTS
Some structure declarations moved to allow use by callback result function.
Result domain names are early uncompress before calling application callback
because it cannot be made by application itself.
Allow search services with multiples labels included, like '_services._dns-sd'.
Search for `_services._dns-sd._udp.local.` is handled in a special way.
Only `PTR` answers are send back to the application.
The `mdns_search_service()` function won't assert if no more space in `mdns_request`
table, just return an error if too many simultanous requests.
Apparently the TFTP server now also invokes the error() function in the
tftp_context struct.
Some tftp clients (for example Windows 10 TFTP client) will open the
remote file before checking the local file can be opened - and will then
send an error indication to the server to indicate there was an error
opening the local file. When the happens, the LWIP tftp server will
invoke the error() member of the tftp_context.
This adds support for RFC4075 SNTP server configuration via DHCPv6.
The DHCPv6 options transmitted are now conditional on how LwIP is
configured.
A new SNTP application option SNTP_GET_SERVERS_FROM_DHCPV6 is used
to enable. For simplicity this is configured to use the global
LWIP_DHCP6_GET_NTP_SRV configuration setting.
Tests:
- Check the global options now control the DHCPv6 request sent
in Wireshark
- Check against 0, 1 and 3 SNTP servers configured on an odhcpd
server configured to support RFC 4075 SNTP server lists.
Verify that the SNTP server list is updated on connection
establishment on an ESP8266 WeMOS D1.
- Verify that SNTP packets are sent and recieved from a
configured server and that system time is updated.
Signed-off-by: David J. Fiddes <D.J@fiddes.net>
Use only one entropy/ctr_drbg context for all altcp_tls_config structure allocated.
(Small adjustments before committing: fix coding style, adapt to changes in master)
- client->msg_idx can be > MQTT_VAR_HEADER_BUFFER_LEN in long message splitted in multiple pbufs
- renamed fixed_hdr_idx to fixed_hdr_len because it is length of fixed header in rx_buffer, not an index to it
- removed the cpy_start as data always copied right after the fixed header
Fix building unit tests via contrib/ports/unix/check on Debian 9, gcc 6.3.0.
Fixes:
<snip>/ip_addr.h:105:58: error: the comparison will always evaluate as ‘true’ for the address of ‘ip1’ will never be NULL [-Werror=address]
#define IP_SET_TYPE(ipaddr, iptype) do { if((ipaddr) != NULL) { IP_SET_TYPE_VAL(*(ipaddr),iptype); }}while(0)
Signed-off-by: Jacob Kroon <jacob.kroon@gmail.com>
Make pppoe_create() actually store the passed service name and
concentrator name, so that they are passed in the PADI/PADR/PADS
packets.
Assume that the user application won't be freeing the strings and just
copy the string pointers, therefore remove the mem_free() in
pppoe_destroy().
Since only the pointers are copied now, make them 'const' in
pppoe_softc.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
lwip/src/netif/ppp/pppoe.c:768:24: error: pointer targets in passing argument 1 of ‘strlen’ differ in signedness [-Werror=poin$
l1 = (int)strlen(sc->sc_service_name);
lwip/src/netif/ppp/pppoe.c:772:24: error: pointer targets in passing argument 1 of ‘strlen’ differ in signedness [-Werror=poin$
l2 = (int)strlen(sc->sc_concentrator_name);
sc->sc_service_name and sc->sc_concentrator_name are best defined as
char* because there are passed to libc strings functions which expect
a char*.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Rename PPPOE_TODO to PPPOE_SCNAME_SUPPORT because this is the only
feature enclosed by them. Prepare for proper service name and
concentrator name support by moving PPPOE_SCNAME_SUPPORT define to
ppp_opts.h.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
src/apps/mdns/mdns.c: In function 'mdns_debug_print_answer':
src/apps/mdns/mdns.c:796:24: warning: ', rdata = ' directive output may be truncated writing 10 bytes into a region of size between 8 and 15 [-Wformat-truncation=]
snprintf(string, 35, "Type = %2d, class = %1d, rdata = ", a->info.type, a->info.klass);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/apps/mdns/mdns.c:796:3: note: 'snprintf' output between 31 and 38 bytes into a destination of size 35
snprintf(string, 35, "Type = %2d, class = %1d, rdata = ", a->info.type, a->info.klass);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lwip/lwip/src/apps/http/makefsdata/makefsdata.c:929:56: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
snprintf(qualifiedName, sizeof(qualifiedName), "%s/%s", curSubdir, filename);
/home/dziegel/lwip/lwip/src/apps/http/makefsdata/makefsdata.c:929:3: note: ‘snprintf’ output 2 or more bytes (assuming 257) into a destination of size 256
snprintf(qualifiedName, sizeof(qualifiedName), "%s/%s", curSubdir, filename);
Reduce subdir string length by 3 bytes to make the warning go away. The whole file path including directory AND filename is limited to MAX_PATH_LEN - so it is reasonable to reserve 3 bytes less for directory - the filename won't fit anyway in the remaining 3 bytes.
If the host observes a response (after probing) containing RR's
that he thought were unique to him, there is a conflict. If a host
observes such conflict, it resets back to probing and the probing
procedures will resolve the conflict. (RFC6762 section 9)
Update mdns.txt for below API changes:
* mdns_resp_add_netif() no longer has dns_ttl argument
* mdns_resp_add_service() no longer has dns_ttl arguemnt
* mdns_resp_add_service() uses enum mdns_sd_proto for proto argument
* Add missing const qualifier at appropriate places
Signed-off-by: Axel Lin <axel.lin@ingics.com>
by replacing strnlen with strlen. It's a user-supplied string, so we can assume it is correctly \0 terminated (as done several times elsewhere in the code)
According to RFC6762 section 8.1:
If fifteen conflicts occur within any ten-second period, then the
host MUST wait at least five seconds before each successive
additional probe attempt.
If the host restarts mDNS, instead of a probe wait timeout randomly
chosen between 0 and 250ms, we wait 5s if more then 15 conflicts
occured in 10seconds. This flag is reset from the moment probing
succeeded.
mDNS: first version probe tiebreaking added
This first version works for our MCU boards but does only compare
the first question and answer. It does not sort the list of answers
and it does not search for answers or questions.
mDNS: improved probe question handling
For every probe question in our packet, we check the presence
in the incomming packet until we find a match. then we perform
the tiebreaking. At the moment we still only look at the first
answer.
mDNS: evaluate all answers in the authoritative section
The authoritative sections of both messages are evaluated.
The records that answer the probe question are sorted in to lists.
Then the lists are compared pairwise. A winner and a loser are
chosen and the host reacts on the outcome (ignore or stop probing).
mDNS: add support for name decompression in rdata when comparing.
For probe tiebreaking we need to compare RR's. It is possible that
the rdata of an RR contains compessed names (SRV record). We need
to decompress it first before we do the comparison.
Probe packet creation -> by splitting the definition and the sending
we can use the definition function for probe tiebreaking.
outpkt creation -> by splitting the creation and sending we can use
the creation function for probe tiebreaking.
The host only responded to a probe query via unicast because
according to the RFC, a probe should have the QU bit on.
This is a should and not a must so we need to be careful.
We added multicast probe answering support with the needed timouts.
Avahi for example probes with the QM queries. With this commit the
conflict is resolved.
It should be SYS_MBOX_EMPTY, not SYS_ARCH_TIMEOUT.
SYS_MBOX_EMPTY is defined to SYS_ARCH_TIMEOUT, so there is no bug.
But for good readability of the code, SYS_MBOX_EMPTY should be used.
The implementation was not fully to the standard. This commit adds
a nicer state machine implementation and multiple announce messages
with a minimum of 2.
See below commit messages for more information
mDNS: support for direct and delayed sends
There are two ways to send a response, directly and after a delay.
A probe or an announce msg are now send via the direct way and
all responses are send via the delayed way.
mDNS improved delay vs direct send behavior on questions
All multicast answers are delayed at the moment. While all unicast
answers are send out directly. A unicast answer is send when this
is requested by the QU bit, when a unicast question was send or
when the question originated from a legacy querier.
mDNS: add probe query detection.
If a probe query is detected a direct unicast respond is send.
Independent of the QU/QM bit.
mDNS split delayed multicast msgs into ipv4 and ipv6 buffers.
We are implementing a two resolvers in one (IPv6 and IPv4 together).
For directly send answers, this does not matter. But for delayed
answers, we need to make a separate buffer for both.
mDNS: addr bug, we should not clear full outmsg
memset deleted also the dest_addr and dest_port, which should remain
and is constant. This commit contains a function that resets only the
needed parts of the outmsg struct.
mDNS: do not multicast a rr within one second.
RFC6762 section 6: prevent network flooding. When a multicast packet
is send out, we start a timeout of 1s within this 1 second all
multicast requests are ignored. We do not make a difference between
the records, we set the delay for all records.
mDNS: improved split for unicast vs multicast and direct vs delayed
unicast delayed message are now possible and multicast direct msgs to.
MDNS: changed printfs to lwip debug messages
MDNS: change timeouts from max time to random time
mDNS: send multicast response on QU questions if not multicasted recently.
If a QU question is received, the responder should multicast the
answer if it did not multicast that record within 25% of it's ttl.
we implemented a stripped down version, meaning that we look at the
records as one set and use one timer for all records. So if the
responder multicasted a record within 30s of the QU question it
will respond with a unicast answer. if not, it will respond
multicast.
mDNS: timeouts -> create function for mdns timeout handling
mdns_set_timeout will check if the timer is running or not and will
update the flag to running after starting the timer.
Multicast timeouts were not set everywhere they needed to be. This
is solved.
mulit <-> multi typo fixed.
mDNS: solve commenting and style issues
mDNS: add #if LWIP_IPVx to new code
LWIP_IPV4/6 can be enabled or disabled, all combination should work.
it's more practical to use netif as a wrapper instead of wrapping
netif in the mdns packets. netif contains all information.
Netif is passed along were needed.
MDNS_TTL changed to MDNS_IP_TTL for clarity.
The mDNS RR ttl does not need to be settalbe, this is against the
RFC. RFC6762 states that for rr's with the hostname in them
somewhere, the ttl should be 120s. If it's not in their it should
be 75 minutes and if the answer is send to a legacy dns querier,
it should be no more then 10s.
This patch corrects the ttl behavior to the RFC.
see RFC 6762 section 8.2: for tiebreaking to work correctly in all
cases, the Authority section must contain all the records and
proposed rdata being probed for uniqueness.
mDNS.c needed to become cleaner. Domain related functions are
moved to the mdns_domain.c util module. The output related
functions are split off (clear separation between defining the
packet and generating the packet). The output functions can
now be found in mdns_out.c.
mDNS move probe question packet generation to mdns_send_outpacket
The probe any questions were added to the pbuf in the send_probe
routine. It is better if we move all pbuf generation to the output
function so later on packets can be delayed etc. keep it all in
one place.
mDNS: move legacy question generation to mdns_send_outpacket
It's better to do the pbuf generation in one place.
Especially important for message delaying etc.
mDNS take out domain related functionality and put in other file.
The mDNS file is getting very big and a lot still needs to be added.
For clarity reasons it's better to split these domain functions
from the main mDNS file.
mDNS split off output related functionality and put in other file
A lot of functions are only needed for the generation of the pbuf,
by separating them into another file we clean up the mdns file.
We only need the mdns_send_outpacket function as interface.
Packet definition is now completely separated from packet
generation.
This reverts commit 684adaca29.
It changes the behaviour to assert for applications running good so far.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
lwip_getsockopt_internal/lwip_setsockopt_internal were renamed to
lwip_getsockopt_impl/lwip_setsockopt_impl. Update the comment accordingly.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This is the default way for mbedTLS. Add entropy sources via defines (see
mbedtls_entropy_init).
This removes the use of ALTCP_MBEDTLS_RNG_FN
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
New etharp queries should restart the 5 second timeout on the ARP
table entry if it is still pending.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
The instance of the SNMP node was found, that's why the functions have been called. So if set_test() and/or set_value() do not exist, it means the SNMP node instance is not writable.
Add define LWIP_HTTPD_SSI_EXTENSIONS to make the extension list
overridable, clarify documentation of LWIP_HTTPD_SSI_BY_FILE_EXTENSION
a bit.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
By defining LWIP_PLATFORM_ASSERT to a function, we can prevent arch.h
from including stdio.h and stdlib.h
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This reverts commit 413b26a7e1.
It breaks the build if LWIP_SOCKET is disabled.
Plus it breaks git history for inet.h and sockets.h for no real reason.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
New macro LWIP_SOCKET_HEADERS can be used to replace
LwIP sockets headers by OS's headers.
By default LWIP_SOCKET_HEADERS==LWIP_SOCKET, when LWIP_SOCKET==1
and LWIP_SOCKET_HEADERS==0, user must provide their custom headers
by setting LWIP_INCLUDE_SOCKETS and LWIP_INCLUDE_INET.
This reverts commit a0d7b01186.
The new 'keypressed()' wasn't platform-independent but broke
the win32 port.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
pppos_input() is safe to call from outside tcpip_thread when
PPP_INPROC_IRQ_SAFE == 1, so only check if PPP_INPROC_IRQ_SAFE == 0
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This reverts commit 1570dd8ad1.
Buffering pcb->local_port is needed because TCP_PCB_REMOVE_ACTIVE()
sets it to 0 via tcp_pcb_remove() (comment: "reset the local port
to prevent the pcb from being 'bound'").
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
I disabled the yet unfixed tests to test if the new travis
integration works. Still working on them...
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
- implement server/client mode (API is nicer to use)
- Increase TFTP_MAX_MODE_LEN to be able to contain "netascii" transfer mode
- Adapt tftp_example to changes
Squashed commit of the following:
commit 2d98d8e2ef1941c3824ffb874f1e529d284667fc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 16:15:06 2018 +0200
AUTOIP: correct functionality autoip_supplied_address
It does not mean that if autoip is bound, it also supplied the
netif address. A check is added.
commit 2ca0a2183991ef73860c4207d95799b37acc64cc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 16:06:49 2018 +0200
AUTOIP: keep using the same link local address as much as possible
Only calculate a new link local address at start up or when a
conflict occured. On link up or down -> keep same address.
TODO: in the future a function for persistent storage should be
added.
commit aa70a693351e4c898aa28d8521308794614838f1
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 14:43:14 2018 +0200
ACD, AUTOIP & DHCP: make link up & down functions where needed
When the link goes down or up the approriate functions should be
stopped or started again. To accomodate this, network_changed is
adjusted to network_changed_link_up and network_changed_link_down.
DHCP does not need to control AUTOIP. AUTOIP can take care of
itself. The only thing DHCP needs to do is starting it when
discovering is failing. The AUTOIP state variable is removed from
DHCP.
commit ad469eb006b47f8a8c37f7c0de0216f47a8c19c7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 11:25:58 2018 +0200
ACD: add address change listener + passive conflict detection mode
In the case their previously was a LL address on a netif that
is now configured with a routable address, we want the LL
address to be able to keep receiving packets.
for as long as the LL address is available on the interface it
should do ongoing conflict detection. But we cannot defend when
the LL address is not the netif address any more.
An address change listener is added to detect when an ACD module
needs to go from active ongoing conflict detection to passive.
When a conflict is detected autoip is stopped and will not be able
to receive packets any more. Because we have a valid routable
address on the netif, autoip is not restarted.
commit 07c4ec20cea78e2b4a6f5599569abaf075619c62
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Sep 11 16:25:37 2018 +0200
ACD: make module reusable within a netif
DHCP and AUTOIP both have ACD running simultaniously. The ACD
struct is added to the DHCP and AUTOIP structs. In the netif a list
of ACD modules is kept to loop over if functions need to perform
some action on all ACD modules (for example tmr function). With
acd_add a module can be added to the list. ACD_FOREACH loops over
the list similar to NETIF_FOREACH.
commit ee3b4585b7768f5353dd80190a2929bad45f7ff4
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Sep 10 16:36:18 2018 +0200
etharp & acd: add probe and announce functions to etharp.
The new probe and announce functions are independent of
netif->ip_addr. This means we can keep the LL address working
while we start to probe for the newly received routable address.
The netif->ip_addr does not need to be any for probing to work
with this patch.
commit 7d3032bae8f1b8081368a807682388eb642729e0
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Sep 3 13:35:51 2018 +0200
autoip -> unused random function removed + small comment update
commit be749ba4eb26ddc69233c85d532dc035741275c5
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 16:37:36 2018 +0200
ACD: update comment in header
commit 4491842991c90b3a58fa327f70aa42f04174546b
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 15:44:45 2018 +0200
ACD: subscribe to link down messages to stop the acd process
When the link goes down the acd process should be stopped
independent of the acd client. Otherwise the acd will keep probing
or announcing while their simply is no connection.
commit 71f668aa7583354e132c20b3b50ba2c86bf08738
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 13:59:44 2018 +0200
DHCP coop autoip bug fix: wait after last discovery before starting autoip
After the last dhcp discovery we need to give the dhcp server the
time to respond. Currently the discovery message is send and autoip
is started simultaniously. This is changed. Autoip will now be started
after the next discovery timeout.
commit 0da16604ec079195533f2591f0d0f04bdf212a72
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 11:23:31 2018 +0200
ACD: rate limit interval bug solved -> first decline then wait then restart.
According the the ACD RFC we need to limit the rate of acquiring
and probing addresses after MAX_CONFLICTS. It is important to first
decline the address and stop the netif from using the address before
the time is started. After this rate limit time, the address acquiring
process can be started again.
To make this possible we had to change the callback function and
the location in the process were the rate limiting is done.
commit a89a0601a251acb14abe270116f38c6d25c2d7a9
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Aug 30 17:27:10 2018 +0200
DHCP: after a succesful dhcp_reboot, the address should be probed.
Reboot means that the connection was gone for some amount of time.
This is seen as a new connection for the ACD module so should be
the address should be probed before use.
commit 853afb448ba35c6e2b35e8238c9c367c599dece7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Aug 30 17:19:12 2018 +0200
DHCP_DOES_ARP_CHECK changed to DHCP_DOES_ACD_CHECK
small update in opt.h to add the correct dependencies.
commit e28b4766bdef69e76f6170c470c93f5b251c579a
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Aug 30 17:05:43 2018 +0200
DHCP check code replaced by ACD module.
when DHCP_DOES_ARP_CHECK is enabled, the ACD module will take care
of address conflict detection. Via a call back function the DHCP
state machine will continue and bind to an address if no conflicts
are found.
dhcp_arp_reply is obsolete because the ACD module replaces its
function.
commit 52193a0f5d13e8786a4db2fff1f1a8f1367a4eba
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Aug 27 16:05:22 2018 +0200
Issue 2 + 3 from Comment #5, task #13508 solved
Removed C++ comments and // ----... marks as requested.
commit 7faaf61275d67ccfb88ea7e26c249428c3088536
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Aug 27 15:55:24 2018 +0200
Issue 1 from Comment #5, task #13508 solved
Comments added to clarify how arp messages are handled.
commit 9348aea22623b705759fd30b873f06a50a104d16
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:45:35 2018 +0200
acd: add comment for callback function
commit 49fdd1177c05b74d49fa179564dcaa5e650adbcc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:42:59 2018 +0200
autoip: Add debugging output and complete comments
commit 591856b82c029687a657a1b1ccc674522e6f4be0
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:25:18 2018 +0200
Removed autoip from timeouts.c
We do not need a timer anymore. All timing is part of acd.
commit 3b3272fdd14015cfca0b3b6d149505b1cf0e36b6
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:22:32 2018 +0200
autoip_network_changed -> first bring down the netif and then acd
Make it do what it says in the comment
commit 77b0ccf96efd22774279c6f9b5bade18c5e42c59
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:21:23 2018 +0200
Simplified the autoIP states + update autoip_start()
commit 96e0581d36857f8b70c4b4cce4fb323fd3dd51ab
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:10:48 2018 +0200
Deleted unused variables, functions and defines from autoip module
The functionality is now embedded in the acd module so can be
removed from autoip.
commit 9296e2ebb4b51019aaccfc47e8b9f51b265d37cd
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:07:34 2018 +0200
Bug fix acd -> rate limiting needs to be after MAX conflicts
It was only after MAX conflicts + 1.
commit c55e16903c045d0ea84336b50eccbf24d3d097e9
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 17:52:45 2018 +0200
Small intruduction to module added
commit d1498a37293bd9f97f6b938b48e5980ab0a01bd1
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 17:49:58 2018 +0200
Copyright information added
I based the copyright text on the other files. I'm not sure this
is how its done. I kept Dominik in their because I copied quite
some code from the autoip module.
commit 359a845ef5e73061832069f364b370634ee0b071
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 17:08:44 2018 +0200
Fixing comments in acd.c
commit 100d72549d0ef44157143d031848a727f5dfbe69
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 15:43:40 2018 +0200
Probe wait time and Probe interval time made random via lwip_rand
According to the RFC a random amount of time needs to be waited
before probing can be started also a random amount of time
needs to be waited between the probes.
The random time is calculated via the LWIP_RAND function (see
lwipopts and sys_arch).
commit f7f037c32e9416f8b803c3c7af617b871b55ee35
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 16:56:48 2018 +0200
autoip will start probing again when the network has changed
commit 1f40f6274195f24aa1b05caf82b79285ad189c2a
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 16:55:47 2018 +0200
Duplicate code removed -> already present in autoip_start
commit be59431271da862a8ca330dbca638842c87765bc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 16:52:49 2018 +0200
add rate limiting to acd when too many conflicts are detected.
When more then max conflicts are detected during device on time,
the rate at which probing for a new address starts is limited.
For clarity we combined the conflict counting and the callback into
a new function acd_restart.
commit 91448455e95edb24c1f418c341b6fb306391f4f1
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:50:01 2018 +0200
ARP packet conflict detection added.
If a conflict is detected between the begin until after announce
wait, a new address needs to be chosen immediatly.
This can occur in two situations:
1) another host already has this ip address
2) another host is also probing for the same address.
If a conflict is detected during announcing or during the ongoing
conflict detection, we defend our ip address once. If a second
conflict occurs during defend interval, we take another ip address.
If not we can keep our address and connections.
When a conflict occurs and it's decided we need a new address,
autoip is simply restarted. To do: test if a acd stop is needed.
This will become more important when DHCP is added I believe.
commit 65f47ba9444d8b9f767dc908319579323eeb8664
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:33:44 2018 +0200
Update ACD state machine with PROBE_WAIT and and ANNOUNCE_WAIT
By adding the ANNOUNCE_WAIT state, we could remove duplicate code
that was present in the original autoip state implementation.
But because we cannot directly go to ANNOUNCING we needed this
extra state during the wait period. It also makes the different
states clearer.
Their is no need to number the enum because the compiler takes
care of this standard numbering.
Also a indent issue on the state machine code is solved here.
commit 2d9f4414c7b1f2ed35c0b5cea78dabb9c9afee77
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:28:33 2018 +0200
Added an extra check for etharp responses.
Their is no need to answer a request that is initiated by ourselves.
In my test case, a conflicting request would be seen here as a
request needing a reply. Which off course isn't needed at all.
The acd module will let the requester know that it is using our
ip address.
I could not think of a reason not to add this extra check but please
check if this doesn't break other functionality.
commit f84cc1dba4061219bd1aadb97bd340278db07cd7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:27:13 2018 +0200
Redirect all incoming ARP messages to the ACD module.
The ACD module will scan the packets and react on conflicts.
autoip does not need the arp packets any more.
commit 9faf266993cc2df0b9434720b59b5922f17d7d33
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 10:08:39 2018 +0200
Initiate acd from autoip implementation.
The state machine in autoip is now replaced by the acd module.
commit 40a5a40d911c98e6ee8566c0adce7716f26f20e0
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 10:05:59 2018 +0200
Add simple acd state machine to timer function.
This state machine will be started from acd_start and will go
through the probing and the announcing state. At this moment the
timings are made fixed for easy debugging. Will be made variable
afterwards.
commit 0a2629bf1f7942e80ec11bcc3e163ac1a2b9a580
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 09:44:19 2018 +0200
Disable gratuitous ARP send from netif_issue_report when acd is enabled
The acd module needs to be fully under control on what arp messages are
send. It wouldn't be a clean solution if we kept this announce as one
of the announce messages.
So when ACD is enabled, this message will not be send.
commit a7b9a4d5039168723c2043677176c5c8fc69f8df
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 09:42:46 2018 +0200
ARP probe and announce functions added.
Both use etharp_requests to send out an arp message.
commit e2f1ce3fa84e2ce01bc944d8049412e156cd7cc7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 09:26:07 2018 +0200
Add conflict callback mechanism to acd module
When starting the acd with acd_start, a conflict callback has to be
provided. After probing when no conflict is detected, the callback
is called with the conflict variable on 0. From the moment a conflict
is detected, it will be called set to 1.
By not making a fixed link between acd, autoip and dhcp but working
with callback functions the user (caller) can easily use it for
fixed ip too. This keeps the acd module completely independent from
the other application layer protocols.
commit 21e7995888d2941601e99873ee129d1ea927e3f7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 14:41:52 2018 +0200
acd_stop function added.
When calling this function the acd state machine will be put in
ACD_STATE_OFF. This will disable the acd functionality until
acd_start is called.
commit 503037fb462504e46a14ce7486bc763dbc6a8690
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 14:35:48 2018 +0200
acd_start function added
This function will allocate a struct for the acd module if one wasn't
added with acd_set_struct. It will then initialize the acd struct
and start the probe wait timer (for now fixed).
commit e439f6dffc44e93078a2976783bdebfe17304d8c
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 14:22:39 2018 +0200
ACD_DEBUG define added for enabling / disabling debug messages.
commit 80d33e1eaf092934ace1045fac096464cd5be5e9
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 11:39:37 2018 +0200
ACD struct added together with set struct function
ACD needs some variables: state, timing, probe counter etc.
We added the struct as netif data. For now one ACD module per netif
is enough. We found some unclarities about ACD with multiple IP
address on one interface. For now, ACD will only be implemented for
the IP address that is going to be used / is being used on the netif.
commit 2c4cca36744973318c3efe7cbae6384b52dc71a8
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 11:35:06 2018 +0200
Add acd timer to timeouts.c with interval of 100ms.
This timer will be used for time to wait counting etc.
Very similar to the auto ip timer.
commit e2ed447e00c4df790df21509acb4ab09b5b79e66
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 16:56:39 2018 +0200
Add ACD protocol definitions
commit 445733214460eae18817556439bed979e9b3747c
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 16:07:58 2018 +0200
Add c++ option (to use C code module in c++)
commit 63d78bc1f77ac6698c3d663a1c67b40a0c297125
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 15:57:34 2018 +0200
Added on off option for ACD module
commit d5ec4b69eb4175d4dd569bcfc80ae0e192780015
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 15:09:40 2018 +0200
ACD IPv4 module files added
The files for IPv4 ACD or Address Conflict Detection are added
to the lwip source.
Reverts a regression introduced in
3a8af612b3:
Use hardware address fetched from neighbor cache *not* the hardware
address of the interface as destination address.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
See bug #54655:
"MQTT brokers such as Google Cloud IoT Core requires MQTT clients
to send JSON Web Token (JWT) as password field of the MQTT Connect
packet. JWT can be more than 255 bytes.
Currently, the MQTT library restricts password to be less than 256
bytes, thus it prevents connectivity to Google Cloud IoT Core."
Fix that by just converting the local variables for these from u8_t
to u16_t.
Suggested-by: Richmond Umagat <richmond.umagat@brtchip.com>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
TLS clients that need 2-way authentication (e.g. Amazon AWS IoT cloud mqtt)
need to pass a certificate and private key when creating the tls altcp_pcb.
Added a new function altcp_tls_create_config_client_2wayauth() for this that
replaces altcp_tls_create_config_client() for such clients.
See bug #54601.
not needed any more since commit b0344518e8
"sockets.c: Don't rely on #defines in socket.h to be in sync with ip.h
Map SO_* to SOF_* #defines"
Reported by Joan Lledó on mailinglist 6.Sep.2018
magic_init() is first time called from ppp_init(), which is called from
lwip_init(). If system has no RTC, sys_jiffies() returns same value in
this moment after every power-up or system reset. This value used in LCP
magic number generation after ppp_connect(), which leads to same magic
number after every restart. Subsequent magic_randomize() calls takes
place in ppp_input(), after magic number generation.
Call magic_randomize() somewhere near start of ppp_connect() (and
ppp_listen()) as it might be called later at a random time.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
When the network is changed, dhcp is rebooted.
It will send a dhcp request again to verify it's lease.
DHCP requests are send out in selecting state, rebinding, renewing
and rebooting. But in the rebooting state the hostname option is
not included. This means that after reboot, the hostname will be
unknown to the DNS.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This fixes an issue seen on MacOS with Clang 9.0.0:
../../../../lwip/src/core/ipv4/etharp.c:1069:142: error: format specifies type 'unsigned short' but the argument has type 'netif_addr_idx_t'
(aka 'unsigned char') [-Werror,-Wformat]
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: dropped previously queued packet %p for ARP entry %"U16_F"\n", (void *)q, i));
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
../../../../lwip/src/core/ipv4/etharp.c:1074:120: error: format specifies type 'unsigned short' but the argument has type 'netif_addr_idx_t'
(aka 'unsigned char') [-Werror,-Wformat]
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: queued packet %p on ARP entry %"U16_F"\n", (void *)q, i));
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
By default, netif_addr_idx_t is u8_t, so cast up to u16_t to match the format type
e.g. if the calling stack should not invoke the mdns functions due
to high stack usage, disable the option and trigger it yourself.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Also remove additonal (cname == '\0' || cname == '.') check because
it's covered by !lwip_isupper(cname) test.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
If a chained pbuf starts with DHCP_OPTION_PAD, an overflow check
triggers and the packet is ignored.
Fix this by changing the way the offset is increased for PAD.
Also ignore a packet that is missing the END option.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Fix below build error:
In file included from
../../../../lwip/src/../test/unit/tcp/test_tcp.c:3:0:
../../../../lwip/src/../test/unit/tcp/test_tcp.c: In function
‘test_tcp_rto_timeout_syn_sent_impl’:
../../../../lwip/src/../test/unit/tcp/test_tcp.c:1246:113: error: suggest parentheses around arithmetic in operand of ‘|’ [-Werror=parentheses]
const u16_t tcp_syn_opts_len = LWIP_TCP_OPT_LENGTH(TF_SEG_OPTS_MSS|TF_SEG_OPTS_WND_SCALE|TF_SEG_OPTS_SACK_PERM|TF_SEG_OPTS_TS);
^
../../../../lwip/src/include/lwip/priv/tcp_priv.h:305:4: note: in definition of macro ‘LWIP_TCP_OPT_LENGTH’
(flags & TF_SEG_OPTS_MSS ? LWIP_TCP_OPT_LEN_MSS : 0) + \
^~~~~
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Fail to build if PPP_SUPPORT is disabled because PPP_NUM_TIMEOUTS
references defines that are unknown if PPP_SUPPORT == 0. Move
PPP_NUM_TIMEOUTS to PPP_SUPPORT block and set a default value to 0
if PPP_NUM_TIMEOUTS is still not defined at the end of ppp_opts.h.
Fixes: e4e0fc4193 ("PPP: set PPP_NUM_TIMEOUTS_PER_PCB value to computed number of simultaneous timers")
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
A deep analysis of simultaneously running timers showed we can use a
slightly smaller value for PPP_NUM_TIMEOUTS_PER_PCB, value which was
arbitrarily chosen to a safe value based on the number of enabled PPP
features. Add the boring and long analysis to the end of our internal
header file and use the result in ppp_opts.h.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Only the transmission side works for now (todo: dual and tradeoff mode).
Also, only a 10 second timeout mode is implemented for now.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Managed to find the spirit behind the RFC. Looks like we need to send
a ZLB packet with counters as is to the packet (ZLB or not) we
previously sent to ack the message. Luckily we don't need more than
received NS/NR counters to forge the resent ack.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
We never use the current peer NS value but always the next expected peer
NS value (current value plus one).
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Conform a little bit more to the RFC by dropping duplicate received
packets. It might help discover Ns sequence issues.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
It can't be an issue since we only send and receive a few L2TP control
packets and we don't care about anything received next other than
sending Ack packet. For the sake of correctness properly handle Ns/Nr
counters wraparounds, it doesn't add more code anyway.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
L2TP tunnel is really UP only once we received the ICCN Ack packet,
generally with a ZLB packet. We actually drop all data packets until
we reach the "data" L2TP state, which is a sane thing to do, therefore
it makes no sense at all to start the PPP session a bit earlier.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Our Ns counter is the current slot rather than the next to ease packet
retransmission. Therefore we increment the Ns counter before using the
next slot instead of after. The RFC is written with post-increment in
mind rather than pre-increment, thus when the RFC says that Ns in not
incremented for ZLB packets it actually means that ZLB packets are sent
with the next Ns without post-incrementing the Ns value, meaning the
ZLB packet does not take a slot. Since we are using a pre-incremented
value for real slots we need to send ZLB packets with our current Ns
value plus one.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
lwip/src/netif/ppp/pppoe.c: In function ‘pppoe_send_padt’:
lwip/src/netif/ppp/pppoe.c:1048:108: error: ‘sc’ undeclared (first use in this function)
sc is not passed to ‘pppoe_send_padt’ function because it might be
called to terminate unknown sessions.
Fixes: d4047ea1d1 ("Try to fix issues reported by coverity")
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
The new NULL checking against netif_input_fn make ppp stop working
because in ppp_new() it calls netif_add with NULL netif_input_fn.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This partly reverts 31bc2f9b which broke pppos tx as 'pppos_output_append'
implements a custom scheme of checking available pbuf size.
Added a comment why PBUF_POOL is ok for tx in this special case.
See bug #51908
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Fix the case where nd6_send_rs() fails: send one solicitation here,
not LWIP_ND6_MAX_MULTICAST_SOLICIT.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
... and add a unit test for it.
Moved resetting netif->rs_count from all reports to link-up and netif-up only.
While at it, clean up the interface a bit so that netif->rs_count is touched
from nd6.c only.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
arp table functions, nd6 destination cache and struct netif_hint
can now be u16_t or u8_t depending on table size, so up to 32K
entries can be used in these tables (s16_t)
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This should hide the internal type used for access to the ARP table
which currently is s8_t or u8_t, depending on the use case.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This optimizes the netif_loop_output to only schedule a call to poll when
the first packet is enqueued. This ensures netif_poll is ran once per
burst of packets that are sent (which is typical in a TCP transfer)
The old behavior scheduled a call to poll for every packet that was
enqueued and this lead to exhaustion of the MEMP_TCPIP_MSG_API memory pool
and tcpip_mbox (if port is using static mbox size). The extra callbacks are
wasted work because netif_poll drains the entire queue when ran
This issue presented itself when large TCP transfer go across the loopback
netif
This disable checksum generation and checking for the loopback netif
when LWIP_CHECKSUM_CTRL_PER_NETIF is enabled
Checksums are not needed for the loopback adapter and this will increase
performance for loopback communication
This timeout is used to measure TFTP_TIMEOUT_MSECS fine enough.
Calling tftp_tmr at a 50ms interval to handle a 1 seconds timeout
produces way too much cpu load (and prevents sleep).
Signed-off-by: goldsimon <goldsimon@gmx.de>
Gcc complains that an array index is a 'char' when passing a 'char' to
toupper(). Quieten this by coercing to an 'unsigned char'.
Signed-off-by: goldsimon <goldsimon@gmx.de>
The comment in dhcp_handle_ack for 'offered_si_addr' states:
'boot file name copied in dhcp_parse_reply if not overloaded'
However this code was never reached if the packed was not 'overloaded'
Signed-off-by: goldsimon <goldsimon@gmx.de>
Threads blocked on the rx mbox are counted and on close,
one "netconn closed" message per thread is posted to the mbox
to ensure all threads are woken.
The netconn can then be safely deleted. In socket API, "fd_used"
and "fd_free_pending" help with auto-deleting the netconn.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This is necessary to implement fullduplex sockets that are closed asynchronously:
the netconn in the socket must not be freed before all threads have given up
using it.
We now call the first part of 'netconn_delete()' (moved to 'netconn_prepare_delete()')
from lwip_close() and only actually end up calling 'netconn_free()' from
'free_socket()', which might be called later if LWIP_NETCONN_FULLDUPLEX is enabled.
Signed-off-by: goldsimon <goldsimon@gmx.de>
Calling SYS_ARCH_PROTECT() could happen twice in 'free_socket()' if
that free was executed delayed (e.g. in 'done_socket_locked()').
Signed-off-by: goldsimon <goldsimon@gmx.de>
The code to migrate flags from original segment updating wrong variable
so both remainder and remainder_flags may be incorrect. Fix it.
Fixes: f582c88339 ("tcp: persist timer re-work (bug #50837)")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Joel Cunningham <joel.cunningham@me.com>
As the common code to call tcp/udp/raw_netif_ip_addr_changed is called
by multiple places, add netif_do_ip_addr_changed() to call them.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Simon Goldschmidt <goldsimon@gmx.de>
Current implementation iterates the lowpan6_data.reass_list every time
dequeue_datagram() is called.
We can get previous lrh in all the context calling dequeue_datagram().
By adding a prev arguemnt to dequeue_datagram(), we can speed up the
dequeue datagram process.
All the callers never check return value of dequeue_datagram() as it
always return ERR_OR, thus make it return void instead.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Simon Goldschmidt <goldsimon@gmx.de>
Without this, closing the connection after successful transfer resulted
in a RST being sent because the window was not fully marked as 'recved'.
Signed-off-by: goldsimon <goldsimon@gmx.de>
Fragment datagram_size and datagram_offset should be calculated from the uncompressed datagram.
We did this on the compressed size and thus were not compatible to other implementations.
Now my test setup communicates with contiki sicslowpan.
Signed-off-by: goldsimon <goldsimon@gmx.de>
netifapi related lwIP internal definitions should be guarded
by #if LWIP_NETIF_API rather than #if LWIP_NETCONN || LWIP_SOCKET.
Fix below build errors:
cc -g -DLWIP_DEBUG -Wall -pedantic -Wparentheses -Wsequence-point -Wswitch-default -Wextra -Wundef -Wshadow -Wpointer-arith -Wcast-qual -Wc++-compat -Wwrite-strings -Wold-style-definition -Wcast-align -Wmissing-prototypes -Wredundant-decls -Wnested-externs -Wunreachable-code -Wuninitialized -Wmissing-prototypes -Wredundant-decls -Waggregate-return -Wlogical-not-parentheses -Wlogical-op -Wc90-c99-compat -Wtrampolines -I. -I../../.. -I../../../../lwip/src/include -I../../../ports/unix/port/include -I../../../../mbedtls/include -Wno-redundant-decls -DLWIP_HAVE_MBEDTLS=1 -c ../../../../lwip/src/api/netifapi.c In file included from ../../../../lwip/src/api/netifapi.c:46:0:
../../../../lwip/src/include/lwip/netifapi.h:76:50: error: unknown type name 'netifapi_void_fn'; did you mean 'netif_init_fn'?
err_t netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc,
^~~~~~~~~~~~~~~~
netif_init_fn
../../../../lwip/src/include/lwip/netifapi.h:77:29: error: unknown type name 'netifapi_errt_fn'; did you mean 'netif_input_fn'?
netifapi_errt_fn errtfunc);
^~~~~~~~~~~~~~~~
netif_input_fn
../../../../lwip/src/api/netifapi.c: In function 'netifapi_do_netif_add':
../../../../lwip/src/api/netifapi.c:67:22: error: dereferencing pointer to incomplete type 'struct netifapi_msg'
if (!netif_add( msg->netif,
^~
Fixes: 30a2283993 ("Move netifapi private definitions to priv/api_msg.h")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This writes out the results of the unit tests in an XML file called
lwip_unittests.xml in the same directory as the unittests executable.
See https://libcheck.github.io/check/doc/check_html/check_4.html#XML-Logging
for an example of the ouput. Of particular use is the duration field, for
each test and for the entire test run.
Speed up test_pbuf_queueing_bigger_than_64k by using memcmp rather than
a byte by byte comparision. This allows using word aligned compares
within the memcmp implementation
This fixes a unit test timeout on my Windows 10 box with WSL which was
taking longer than 4 seconds for the unix port unit test to complete
See failure details in https://savannah.nongnu.org/patch/index.php?9579
This protocol is sent over a 2nd netif via UDP/IP and can used to analyze
6LoWPAN with a Wireshark dissector.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This simply wasn't the case until 6LoWPAN. However, since tcpip_input is like this, we
should stay with that pattern.
Adapted documentation in netif.h
Signed-off-by: goldsimon <goldsimon@gmx.de>
Fix build warning with LWIP_6LOWPAN_NUM_CONTEXTS==0.
lowpan6_context_lookup() is only used when LWIP_6LOWPAN_IPHC &&
LWIP_6LOWPAN_NUM_CONTEXTS > 0.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Avoid "LWIP_RFC7668_LINUX_WORKAROUND_PUBLIC_ADDRESS" redefined build
warning if it's set to 0 by lwipopts.h.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Works as expected, but some features are not implemented yet.
(See patch #9364: RFC7668 - 6lowpan over Bluetooth Low Energy -- a new netif)
(I've change the file names only; sg)
Signed-off-by: goldsimon <goldsimon@gmx.de>
Need to undefine LWIP_ICMP6_DATASIZE before change the setting.
While at it, also remove the unneeded #ifndef LWIP_ICMP6_DATASIZE
checking because it is set in lwip/opt.h.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The experimental multi-packet mode splits input bytes depending on a length
decoded from the first 2 bytes and does that until the end of input.
To use this mode, compile with "make D=-DLWIP_FUZZ_MULTI_PACKET"
Signed-off-by: goldsimon <goldsimon@gmx.de>
This reverts commit 2390eb6826.
I've already marked other issues like this as 'invalid', so do this here, too.
Although I don't like the code, there's not much use in fixing this in one place only.
In contrast to netif_get_client_data, netif_alloc_client_data_id() is only
available if LWIP_NUM_NETIF_CLIENT_DATA > 0, not for DHCP etc.
This is correct in netif.c but wrong in netif.h
struct netifapi_msg is defined in lwip/priv/api_msg.h rather than
lwip/netifapi.h. Thus remove include of lwip/netifapi.h from memp.c.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
See bug #50914( TCP_CHECKSUM_ON_COPY when adding data to
retransmission): when adding data to an already transmitted segment
that has an uneven length, the checksum was wrong.
To fix this, tcp_output_segment has to restore seg->chksum_swapped
before returning.
This triggers bug #50914 (TCP_CHECKSUM_ON_COPY when adding data to
retransmission) when data is added to an already transmitted segment
with an uneven length of tcp data.
enum tcpip_msg_type and struct tcpip_msg have members which are only
used when core locking and/or core locking input are disabled. Remove
these from the union to reduce the size. Remove from enum to prevent
usage when these are options are disabled
A quick sizeof test with MSVC 2013 showed a 4 byte size reduction for
struct tcpip_msg (16 bytes -> 12bytes) for the following configuration:
LWIP_TCPIP_CORE_LOCKING 1
LWIP_TCPIP_CORE_LOCKING_INPUT 1
LWIP_TCPIP_TIMEOUT 0
With the changes introduced in b1b6275110
it's no longer possible to get ERR_CLSD from netconn_recv_tcp_pbuf_flags
after we've received data because of the NETCONN_NOFIN flag, so remove
handling for this case. Further the NETCONN_EVT_RCVPLUS stays active in
netconn_recv_data_tcp when the NETCONN_NOFIN flag is used
FIN should only be reported once (as '0' for sockets, as 'ERR_CLSD' for
netconns). Before this change, ERR_CLSD was returned forever...
This is the 2nd try. First try (commit ebcae98ae6)
was buggy in that it could drop the FIN if it was read together with data
(reverted in commit ebcae98ae6).
This version fixes this by adding an apiflag and a netconn flag to keep
track of this.
Headers are never included here or else get_http_headers would not
have been called.
As a result, custom files need to set FS_FILE_FLAGS_HEADER_PERSISTENT
in file->flags if file->len is the correct length of the file.
See also patch #9500
Signed-off-by: goldsimon <goldsimon@gmx.de>
clang failed to build:
../../../../lwip/src/include/lwip/tcp.h:180:11: error: parameter 'ERR_OK' not found in the function declaration [-Werror,-Wdocumentation]
* @param ERR_OK if OK, any error if connection should be dropped
^~~~~~
This patch moves in advance httpd_cgi_handler() call, before assigning
variables like hs->file and hs->left.
In this way, CGI handler could prepare the reply data and set the
"file properties", like file->data and file->len. At the exit, hs->file
and hs->left is correctly assigned.
The handler prototype says it can't access file pointer, however it is
simple to obtain it after setting LWIP_HTTPD_FILE_STATE that enables a
"file state" pointer. It is sufficient to assign file->state to file
itself in fs_open_custom().
For example, I have the request GET /login.cgi?user=admin&pwd=admin and
I have to reply with some JSON data. The answer depends on parameters
user and pwd passed in the query string.
This hook is called from tcp_input() for all kinds of input pcbs when
selected to receive a pbuf (LISTEN, TIME_WAIT, rest). I can parse or
drop an rx pbuf.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This introduces the concept of ext (external/extended) arguments per
tcp_pcb (also for listening pcbs) to store more data than just one
"void *arg" per pcb. The "arg" is for use to applications, whereas
the ext_args may be used by frameworks and leave "arg" untouched.
In addition to a void pointer, callbacks are added to help frameworks
migrate arguments from listen pcb to connection pcb and to free args
when the pcb is freed.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This should make it easier to add debugging messages or other hooks
to the point where tcp pcbs are deallocated.
Signed-off-by: goldsimon <goldsimon@gmx.de>
LWIP_HOOK_SOCKETS_SETSOCKOPT() and LWIP_HOOK_SOCKETS_GETSOCKOPT()
are introduced to implement additional socket options. The hooks
are always called first and report back if they handled the option
or not.
Signed-off-by: goldsimon <goldsimon@gmx.de>
tcp_rst, tcp_send_empty_ack, tcp_keepalive and tcp_zero_window_probe
all execute the same instructions to send a segment pbuf.
Combined into tcp_output_control_segment().
This file has been a mess regarding the order of the functions.
By moving them around, they can be grouped into functions taking
part in normal data transmission (via unsent/unacked) and control
segments (which are allocated, directly sent and freed).
Signed-off-by: goldsimon <goldsimon@gmx.de>
The LWIP_PBUF_MEMPOOL define used MEMP_ALIGN_SIZE instead of
LWIP_MEM_ALIGN_SIZE to calculate the element size of PBUF_POOL pbufs.
This is wrong for MEMP_OVERFLOW_CHECK, since MEMP_ALIGN_SIZE adds
MEMP_SANITY_REGION_AFTER_ALIGNED. This should be only added during
pool_base buffer allocation but for PBUF_POOL, it changed the size
of the pool elements.
This cleans up the code: sys_timeouts_mbox_fetch() was only used from
tcpip.c anyway, so let's move it there.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This fixes build error when LWIP_IPV4=0 && LWIP_IPV6=1:
cc -g -Wall -DLWIP_DEBUG -pedantic -Werror -Wparentheses -Wsequence-point -Wswitch-default -Wextra -Wundef -Wshadow -Wpointer-arith -Wcast-qual -Wc++-compat -Wwrite-strings -Wold-style-definition -Wcast-align -Wmissing-prototypes -Wredundant-decls -Wnested-externs -Wunreachable-code -Wuninitialized -Wlogical-op -I. -I../../.. -I../../../../lwip/src/include -I../../../ports/unix/port/include -I../../../../mbedtls/include -Wno-redundant-decls -DLWIP_HAVE_MBEDTLS=1 -c ../../../../lwip/src/apps/mdns/mdns.c
../../../../lwip/src/apps/mdns/mdns.c: In function ‘mdns_recv’:
../../../../lwip/src/apps/mdns/mdns.c:1817:10: error: implicit declaration of function ‘ip_addr_cmp_zoneless’; did you mean ‘ip6_addr_cmp_zoneless’? [-Werror=implicit-function-declaration]
if (!ip_addr_cmp_zoneless(ip_current_dest_addr(), &v6group)) {
^~~~~~~~~~~~~~~~~~~~
ip6_addr_cmp_zoneless
../../../../lwip/src/apps/mdns/mdns.c:1817:10: error: nested extern declaration of ‘ip_addr_cmp_zoneless’ [-Werror=nested-externs]
cc1: all warnings being treated as errors
Signed-off-by: Axel Lin <axel.lin@ingics.com>
fuzz test revealed that an ip header with options might land in ip4_frag() via ICMP. In this case, we can't use LWIP_ERROR() to check for not having ip options as that might be defined to assert
The callers already ensure the ipaddr/netmask/gw won't be NULL, so remove
the duplicated NULL checking in these static functions.
While at it, also move the code saving old_address for netmask/gw as
it's only used when address is actually being changed.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Replace NULL pointers by IP4_ADDR_ANY4 - at sometime in the future, we make the NULL pointer handling obsolete and we can remove all the NULL pointer checks in the code
- Fix sys_untimeout implementation should not modify timer values since we are now using absolute timeouts.c
- Cleanup and simplify sys_check_timeouts() implementation
- Implement sys_restart_timeouts to rebase all timeouts based on next timer to expire
Changes by me:
- Rename TIME_LESS_THAN to TIME_LESS_OR_EQUAL_THAN
This can be used to post preallocated messages from an ISR to the tcpip thread
when using FreeRTOS, where where calls differ between task level and ISR level.
Signed-off-by: goldsimon <goldsimon@gmx.de>
The netif_do_set_{ipaddr|netmask|gw} are static functions what won't be called
directly, thus move LWIP_ASSERT_CORE_LOCKED to netif_set_{ipaddr|netmask|gw}.
This avoid duplicated LWIP_ASSERT_CORE_LOCKED checking by netif_set_addr().
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This ensures the core is locked when executing the init done function
passed to tcpip_init
The could manifest as a synchronization issue during early init if
another thread was in the LwIP context at the same time
This broke when IPv6 got scopes added. Scopes/zones are checked
even if none of the compared addresses are link local.
Result of the bug was that IPv6 replies were always sent unicast to
the source instead of to the multicast address.
Add ip-generic version that ignores IP zone info, since the v6 group
address is not tied to any netif.
This fixes a bug in tcp_split_unsent_seg() where a chained pbuf was
not correctly updating pcb->snd_queuelen during trimming and snd_queuelen
would desynchronize if pbuf_realloc() freed some of the chain
Also, use pbuf_clen() for adding the new remaining segment rather than ++.
The new remaining segment should always be one pbuf due to the semantics
of PBUF_RAM, but this follows the best practice of using pbuf_clen()
Changes made by me:
- Move all error handling code into mdns_resp_announce() so it can be safely used by external code
- Remove mdns_resp_netif_settings_changed() because it is the same as mdns_resp_announce() after my changes
- Declare #define for a "thread-safe" version of mdns_resp_announce in mdns.h instead of netifapi.h - I don't want to intermix netif API with APPs
Fix below build warning if LWIP_6LOWPAN_IPHC=0.
../../../../lwip/src/netif/lowpan6.c:186:1: error: ‘lowpan6_get_address_mode_mc’ defined but not used [-Werror=unused-function]
lowpan6_get_address_mode_mc(const ip6_addr_t *ip6addr)
^~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../lwip/src/netif/lowpan6.c:160:1: error: ‘lowpan6_get_address_mode’ defined but not used [-Werror=unused-function]
lowpan6_get_address_mode(const ip6_addr_t *ip6addr, const struct ieee_802154_addr *mac_addr)
^~~~~~~~~~~~~~~~~~~~~~~~
Also correct comment typo: s/LWIP_6LOWPAN_HC/LWIP_6LOWPAN_IPHC/g
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This fixes a bug in tcp_split_unsent_seg where oversized segments were not
handled during the split, leading to pcb->unsent_oversized and
useg->oversize_left getting out of sync with the split segment
This would result in over-writing the pbuf if another call to tcp_write()
happened after the split, but before the remainder of the split was sent in
tcp_output
Now pcb->unsent_oversized is explicitly cleared (because the remainder at
the tail is never oversized) and useg->oversized_left is cleared after it is
trimmed
This also updates the test_tcp_persist_split unit test to explicitly check for
this case
Current code only works if the argument happen to be named as fraghdr,
fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
The goto freepbuf code path is also used when IP_REASS_CHECK_OVERLAP=0.
Thus remove #if IP_REASS_CHECK_OVERLAP around the freepbuf label to fix
below build error:
cc -g -Wall -DLWIP_DEBUG -pedantic -Werror -Wparentheses -Wsequence-point -Wswitch-default -Wextra -Wundef -Wshadow -Wpointer-arith -Wcast-qual -Wc++-compat -Wwrite-strings -Wold-style-definition -Wcast-align -Wmissing-prototypes -Wredundant-decls -Wnested-externs -Wunreachable-code -Wuninitialized -Wlogical-op -I. -I../../.. -I../../../../lwip/src/include -I../../../ports/unix/port/include -I../../../../mbedtls/include -Wno-redundant-decls -DLWIP_HAVE_MBEDTLS=1 -c ../../../../lwip/src/core/ipv4/ip4_frag.c
../../../../lwip/src/core/ipv4/ip4_frag.c: In function
‘ip_reass_chain_frag_into_datagram_and_validate’: ../../../../lwip/src/core/ipv4/ip4_frag.c:412:7: error: label ‘freepbuf’ used but not defined
goto freepbuf;
^~~~
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
Use ip_addr_copy instead of ip_addr_set to avoid NULL test for
&sntp_last_server_address. This fixes build warning when
SNTP_CHECK_RESPONSE>=1 && LWIP_IPV4=1 && LWIP_IPV6=1.
In file included from ../../../../lwip/src/include/lwip/apps/sntp.h:41:0,
from ../../../../lwip/src/apps/sntp/sntp.c:52:
../../../../lwip/src/apps/sntp/sntp.c: In function ‘sntp_send_request’:
../../../../lwip/src/include/lwip/ip_addr.h:105:58: error: the comparison will always evaluate as ‘true’ for the address of ‘sntp_last_server_address’ will never be NULL [-Werror=address]
#define IP_SET_TYPE(ipaddr, iptype) do { if((ipaddr) != NULL) { IP_SET_TYPE_VAL(*(ipaddr), iptype); }}while(0)
^
../../../../lwip/src/include/lwip/ip_addr.h:157:36: note: in expansion of macro ‘IP_SET_TYPE’
#define ip_addr_set(dest, src) do{ IP_SET_TYPE(dest, IP_GET_TYPE(src)); if(IP_IS_V6(src)){ \
^~~~~~~~~~~
../../../../lwip/src/apps/sntp/sntp.c:549:5: note: in expansion of macro ‘ip_addr_set’
ip_addr_set(&sntp_last_server_address, server_addr);
^~~~~~~~~~~
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
This adds const to the sntp servername get/set API and internal storage
SNTP's usage of this name is read only and SNTP only passes it to dns_gethostbyname()
This was found by compiling with GCC -Wwrite-strings which makes the literal
SNTP_SERVER_ADDRESS a const string. This then produced warnings with sntp_init()'s
call to sntp_setservername()
lwip_isdigit/isxdigit/islower/isspace takes int as argument, so
explicitly cast to int to silence below build warnings.
src/core/ipv4/ip4_addr.c: In function 'ip4addr_aton':
src/core/ipv4/ip4_addr.c:160:5: warning: array subscript has type 'char' [-Wchar-subscripts]
if (!lwip_isdigit(c)) {
^
src/core/ipv4/ip4_addr.c:175:7: warning: array subscript has type 'char' [-Wchar-subscripts]
if (lwip_isdigit(c)) {
^
src/core/ipv4/ip4_addr.c:178:7: warning: array subscript has type 'char' [-Wchar-subscripts]
} else if (base == 16 && lwip_isxdigit(c)) {
^
src/core/ipv4/ip4_addr.c:179:9: warning: array subscript has type 'char' [-Wchar-subscripts]
val = (val << 4) | (u32_t)(c + 10 - (lwip_islower(c) ? 'a' : 'A'));
^
src/core/ipv4/ip4_addr.c:204:3: warning: array subscript has type 'char' [-Wchar-subscripts]
if (c != '\0' && !lwip_isspace(c)) {
^
Signed-off-by: Axel Lin <axel.lin@ingics.com>
portif = br->ports[dstport_idx].port_netif;
So no need to have NULL test for both br->ports[dstport_idx].port_netif
and portif.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
The version check is done in these functions, it should be ok to put
assert in the else clause.
Fix below build errors:
../../../../lwip/src/apps/snmp/snmp_msg.c: In function ‘snmp_version_enabled’:
../../../../lwip/src/apps/snmp/snmp_msg.c:87:1: error: embedding a directive within macro arguments is not portable [-Werror]
#if LWIP_SNMP_V3
^
../../../../lwip/src/apps/snmp/snmp_msg.c:89:1: error: embedding a directive within macro arguments is not portable [-Werror]
#endif
^
../../../../lwip/src/apps/snmp/snmp_msg.c: In function ‘snmp_version_enable’:
../../../../lwip/src/apps/snmp/snmp_msg.c:126:1: error: embedding a directive within macro arguments is not portable [-Werror]
#if LWIP_SNMP_V3
^
../../../../lwip/src/apps/snmp/snmp_msg.c:128:1: error: embedding a directive within macro arguments is not portable [-Werror]
#endif
^
cc1: all warnings being treated as errors
/home/axel/git/lwip/lwip-contrib/ports/unix/../Common.allports.mk:94:
recipe for target 'snmp_msg.o' failed
make: *** [snmp_msg.o] Error 1
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
This adds a new hook allowing an external DNS resolver to be hooked into
netconn_gethostbyname(). The hook can handle some or all of the queries
One use case for this hook is to run mDNSResponder in the same system as LwIP
(mDNSResponder also uses LwIP's socekt APIs) and have it handle .local queries
while LwIP stack handles unicast DNS queries
Include lwip/sys.h to fix below build error:
../../../../lwip/src/apps/httpd/httpd.c:470:23: error: implicit declaration of function ‘sys_now’ [-Werror=implicit-function-declaration]
u32_t ms_needed = sys_now() - hs->time_started;
^~~~~~~
Signed-off-by: Axel Lin <axel.lin@ingics.com>
MSG_PEEK on TCP sockets was broken since commit b71d4477ea
from 06.03.2017: recv hung in an endless loop and tcp_recved() was called for peeked data
(which would result in a too large window advertised).
Aded TCP MSG_PEEK to socket unit tests
Use NETIF_FOREACH macro to get some optimizations for LWIP_SINGLE_NETIF case.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
We preserved the TIME_WAIT handling before, but it seems this is not correct: we want to issue
a RST later again if someone wants to talk to this port. With TIME_WAIT, this might not always
the case.
Slightly better readability by calling dns_backupserver_available()
instead of open-coded. Also move dns_backupserver_available() function
up to avoid forward declaration.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
- call conn->err() instead of conn->recv() if handshake fail and free conn
- close inner_conn and free current conn in altcp_mbedtls_close()
Signed-off-by: goldsimon <goldsimon@gmx.de>
Partly revert commit 0486100a2b from 07.08.2017 as it breaks layering: every layer must free its own altcp_pcb. Freeing the inner_conn is not the right way.
DHCP test code didn't set link up on net_test netif (exposed by changes
in 637bce91b4)
Then during the test_dhcp function, a Gratuitous ARP was not sent during
the call to dhcp_bind() because the link was still down
The sets the link state for all DHCP test functions
This fixes a bug where some callers of netif_issue_reports were not
checking that both link and admin states were up, leading to extraneous
reports when calling one of the following
1) netif_set_ipaddr
2) netif_ip6_addr_set_parts
3) netif_ip6_addr_set_state
The bug has been fixed by placing link and admin state checks in
netif_issue_reports and not requiring the callers to perform this
checking
Fixes: 3d1a306518 ("SLIP netif: add support for multiple input strategies (threaded, polling, RX from ISR)")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
It does not make sense to return success in p == NULL or
invalid header_size_increment/header_size_decrement cases. Fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The macros are functions from ctype.h, but ctype.h declares them as functions, not as #defines
It makes no sense to abstract them in lwIPs portability layer, the functions are of low complexity and they are only used in this file.
ARMCC when using __packed structures will not implicitly convert a
pointer to a member of a packed structure to something which does not
have __packed. This results in a compiler error and was found with calls
to icmp6_param_problem
While there is a #pragma pack mode in ARMCC that disables this error, it
does require existing ports to switch over their packing mode and
perform integration
During the refactoring in c5db278746, the
previous gotos were removed, but the lack of break statements in
NETCONN_EVNT_RCVMINUS and NETCONN_EVT_SENDMINUS was overlooked, leading
to incorrect fall through behavior
Enables support for MSG_DONTWAIT in lwip_recvmsg(). Support already
exists in lwip_recv_tcp() and lwip_recvfrom_udp_raw(); these are both
accessible from lwip_recvfrom(), which already supports MSG_DONTWAIT.
Signed-off-by: Nate Karstens <nate.karstens@garmin.com>
Signed-off-by: Joel Cunningham <joel.cunningham@me.com>
This avoid having a second description for the same stuff that is "bit-rotting" because noone remembers to update this file.
Also remove outdated and misleading zero-copy TX information.
This makes the following poll cleanups:
1) Add LWIP_ERROR in lwip_poll to check for invalid fds/nfds combinations.
This fixes a possible a NULL fds dereference in lwip_poll_scan()
2) Use has_ copies of the socket events in lwip_poll_should_wake() rather
passing the sock pointer and accessing socket after leaving the critical
section
This fixes the following warnings:
test_tcp.c:266:5: error: code will never be executed [-Werror,-Wunreachable-code]
pbuf_free(p);
^~~~~~~~~
- The check API 'fail' aborts the test, thus pbuf_free(p) will never be executed
pbuf.c:783:111: error: format specifies type 'unsigned short' but the argument has type 'u8_t' (aka 'unsigned char') [-Werror,-Wformat]
LWIP_DEBUGF( PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_free: %p has ref %"U16_F", ending here.\n", (void *)p, ref));
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
- LWIP_PBUF_REF_T is u8_t by default and doesn't match U16_F, so cast to u16_t. The cast and formatter will need to be changed
if ref is larger than 16 bits
ethernet.c:105:16: error: format specifies type 'unsigned char' but the argument has type 'unsigned int' [-Werror,-Wformat]
(unsigned)ethhdr->dest.addr[0], (unsigned)ethhdr->dest.addr[1], (unsigned)ethhdr->dest.addr[2],
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- addr[] is type u8_t, formatter is X8_F which should be 8 bits. 'unsigned' is an int, so cast to unsighed char instead
Current newlib does not define O_NDELAY, but it needs to be the same
as O_NONBLOCK rather than using the lwip value of 1.
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
This makes two cleanups that follows the same organization as close/closesocket:
1) There is no lwip_ioctlsocket. Instead lwip_ioctl should redirect to ioctlsocket
2) With LWIP_POSIX_SOCKETS_IO_NAMES enabled, lwip_ioctl/ioctlsocket should redirect to ioctl
Some systems need to take into account an RX buffer pool size when
advising an appropriate number of RX pbufs to queue on the ooseq
list. For some systems there is a practical hard limit beyond which
the rx pool becomes exhausted blocking reception of further buffers
until some are freed.
It also helps to be able to consider the available dynamic memory when
advising an appropriate maximum number of bytes to buffer on the ooseq
list.
These decisions can also benefit from knowing the number already
allocated on a particular pcb, so the ooseq tcp segement is passed to
these functions. For example, if the system only wants to allow the
total number of rx pbufs queued on all the ooseq lists to grow by one
and a pcb already has two then it can return three for this call, but
might return one for another call - supporting a greedy allocation
strategy.
Signed-off-by: goldsimon <goldsimon@gmx.de>
Hop-by-Hop, Destination option header structures consist of 2 unsigned char; next option type and header length field.
And TLV(Type-Length-Value) option headers come by the number in header length field.
If the option type in TLV option header is not recognized and 2 MSB is not 0, it is handled as an exception.
Signed-off-by: goldsimon <goldsimon@gmx.de>
Hop-by-Hop, Destination option header structures consist of 2 unsigned char; next option type and header length field.
And TLV(Type-Length-Value) option headers come by the number in header length field.
If the option type in TLV option header is not recognized and 2 MSB is not 0, it is handled as an exception.
Signed-off-by: goldsimon <goldsimon@gmx.de>
For this, convert 'u8_t nexth' to a pointer and change 'icmp6_param_problem()' to take a pointer, not an offset number
Signed-off-by: goldsimon <goldsimon@gmx.de>
TCP SACKs were removed after some changes in the ooseq queue,
but before all unneeded packets were removed from it.
Because of that, we would sometimes include SACKs
for data already delivered in-order.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This problem would appear to have only affected systems with multiple
interfaces. It was noted causing tcp resets when the pcb was lost, and there
might have been other associated problems.
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
There were a couple cases in-between that could cause an exit from
tcp_output which don't use useg. With large send buffers, pcb->unacked
may be large and calculating useg is wasted in these exit cases
Some compilers may be re-ordering this already, but it doesn't hurt to
correctly arrange the code
This re-works the persist timer to have the following behavior:
1) Only start persist timer when a buffered segment doesn't fit within
the current window and there is no in-fligh data. Previously, the
persist timer was always started when the window went to zero even
if there was no buffered data (since timer was managed in receive
pathway rather than transmit pathway)
2) Upon first fire of persist timer, fill the remaining window if
non-zero by splitting the unsent segment. If split segment is sent,
persist timer is stopped, RTO timer is now ensuring reliable window
updates
3) If window is already zero when persist timer fires, send 1 byte probe
4) Persist timer and zero window probe should only be active when the
following are true:
* no in-flight data (pcb->unacked == NULL)
* when there is buffered data (pcb->unsent != NULL)
* when pcb->unsent->len > pcb->snd_wnd
netif_get_by_index() returns NULL if idx is NETIF_NO_INDEX.
So remove the superfluous NETIF_NO_INDEX checking for msg->msg.jl.if_idx
before calling netif_get_by_index().
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Interface indexes are u8_t internally so cast from sockets int representation to u8_t
This was found with MSVC 2013:
1>lwip\src\api\sockets.c(3190): warning C4242: 'function' : conversion from 'const unsigned int' to 'u8_t', possible loss of data
1>lwip\src\api\sockets.c(3698): warning C4242: 'function' : conversion from 'unsigned int' to 'u8_t', possible loss of data
lwip_itoa would output the number 0 as \0. This fixes the issue by
adding a special check before the normal conversion loop
This was found via shell cmd idxtoname and win32 port. "lo0" should
be returned for index 1
- add a better-documented static function tcp_output_segment_busy
- try to reduce the number of checks
- tcp_rexmit_rto: iterate pcb->unacked only once
- no need to check for ref==1 in tcp_rexmit_fast when tcp_rexmit does
- call tcp_rexmit_fast if dupacks >= 3 (not == 3) and use TF_INFR flag to guard the fast-rexmit case (that way, it's triggered again on the next dupack)
There is already a guard in tcp_output_segment() for a pbuf still being
referenced by the netif driver due to deferred transmission, however the callers
are modifying state even when this gives up.
It seems cleaner to have the callers guard this case and avoid modifying their
state.
tcp_rexmit_rto() might better avoid re-transmission of any segments if any of
the unacked segments are deferred, to avoid loading the link further if it is
struggling to flush its buffered writes. Link level queues can be limited on
some devices and need spares for link management.
- added `altcp_tls_free_config()`.
- added `altcp_tls_context()` function to allow mbedtls parameter tweak.
Since state structure isn't exported, this allow application to get
internal context (port dependent) to tweak it.
- free altcp_pcb when lower error callback called.
- expose `altcp_tcp_setup()` so we can wrap altcp over existing tcp pcb.
- avoid calling tcp_close() with NULL pcb.
- free altcp_pcb struct when error callback called.
According to `mqtt_tcp_err_cb()` in src/apps/mqtt/mqtt.c, altcp socket should
work the same way than raw tcp socket. So freeing altcp_pcb ensure this.
The new functions both take size_t as increment/decrement argument instead of s16_t (which needed to be range-checked before conversion everywhere) - in most places, the direction (increment or decrement) is known anyway, so no need to encode it in a sign bit
In tcp_output() there were a number of blocks of code performing
duplicate checks of 'if (seg == NULL)'. This combines them together
to reduce duplicate checks
TCP_OUTPUT_DEBUG and TCP_CWND_DEBUG also don't need to be guarded
by #if/#endif since the LWIP_DEBUGF infrastructure already compiles them
out when LWIP_DEBUG is not defined
The ip6_frag.drop counter is updated before all the code paths calling
goto nullreturn, so let's move updating ip6_frag.drop stats to nullreturn.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This fixes a couple of occurrences where the src and dst parameters to
ip4_route_src() were swapped. This was most likely due to confusion between
ip_route(src, dst) and ip4_route_src(dst, src)
This was found in a system where LWIP_IPV4_SRC_ROUTING is 0
The UDP case was an application socket bound to INADDR_ANY with
IP_MULTICAST_IF set. Transmits would result in calling ip4_route(dst) where
dst was pcb->local_addr (which was INADDR_ANY) instead of pcb->mcast_ip4.
This resulted in a routing failure
The ICMP issue was found through code analysis only
There were uses of dhcp_release() followed immediately by dhcp_discover() but
dhcp_release() now stops dhcp so discovery would fail, so call dhcp_start()
after release which restarts discovery.
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
According to commit 1f780e86d5 ("PPP timeouts required depend on the number of allowed PPP sessions"):
Per PPP needs 6 timeouts (AUTH + PAP|CHAP|EAP + LCP + IPCP + IP6CP + PPPoE).
So update the minimal MEMP_NUM_SYS_TIMEOUT setting check accordingly.
Since we have LWIP_NUM_SYS_TIMEOUT_INTERNAL so just switch to use it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
This refactors event_callback() to separate updating socket event
state from processing the select list (to apply socket event change)
Refactoring changes:
1) select_list_cb processing has been moved to a new local function called
select_check_waiters()
2) goto no_select_wakeup has been removed and now we use a flag
to track whether to call select_check_waiters()
3) There is a small functional change for !LWIP_TCPIP_CORE_LOCKING.
We call SYS_ARCH_UNPROTECT after saving events but before calling
select_check_waiters() (which now calls PROTECT before starting the loop).
Before the code held the PROTECT across saving the events and the first
loop iteration, but this didn't protect against anything because each loop
iteration we do an UNPROTECT/PROTECT
4) Better documentation for both LWIP_TCPIP_CORE_LOCKING and
!LWIP_TCPIP_CORE_LOCKING
These are now defined to return != SYS_ARCH_TIMEOUT on success rather than the time
waiting. The returned times were unused by lwip and this simplifies at
least some implementations.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This is to allow an implementation to use a nesting counter, or a
recursive mutex. Also clarify that the value returned by
sys_arch_protect() is opaque to lwip and implementation dependent.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This fixes a bug where when writing IP_PKTINFO to msg_control, the
msg_controllen field was not updated with the length written
This bug is exposed by applications that provide a msg_control buffer large
enough for multiple control messages. Then when calling CMSG_NXTHDR, it
returned a next cmsg pointer even though was no additional message
The ip6_addr_t structure may have an addition slot so is not necessarily
the size of an ipv6 address, so some uses of sizeof(ip6_addr_t) were not
correct.
Signed-off-by: goldsimon <goldsimon@gmx.de>
No need to have additional if statement for PBUF_REF/PBUF_ROM.
It can be merged to the existing swtich(type) cases.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Adds partial support for selective acknowledgements (RFC 2018).
This change makes lwIP negotiate SACK support, and include SACK
data in outgoing empty ACK packets. It does not include it
in outgoing packets with data payload.
It also does not add support for handling incoming SACKs.
Signed-off-by: goldsimon <goldsimon@gmx.de>
Use vj_uncompress_err() instead of duplicating the same code.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Current code does not correctly update ifoutoctets counter because nb->tot_len
is always 0. Fix it by setting nb->tot_len to actual payload length so we can
update ifoutoctets correctly.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
This changes tcpflags_t to be a u16_t for all cases. The TCP Appropriate
Byte Count support added a new flag that used a bit past 8 and since this
flag is now required, tcpflags_t can no longer be a u8_t
This does not increase the size of struct tcp_pcb due to padding that
already existed (see bug #51326 for details)
Signed-off-by: goldsimon <goldsimon@gmx.de>
The function previously returned after posting a message, which is a short operation. Now it actually waits until the operation has completed - which may take a long time. This may break user programs. So all that remains is the cleanup separation in tcpip_callback() and tcpip_try_callback() :-(
Created two new functions for API cleanup:
tcpip_callback() that blocks until message is posted, cannot be called from IRQs.
tcpip_try_callback() that does not block and just tries to post a message. Can be called from IRQs.
Add compatibility #define tcpip_callback_with_block() that maps to these two functions according to "block" parameter.
This switches netconn_gethostbyname to use tcpip_send_msg_wait_sem to
take advantage of core locking support when enabled.
tcpip_send_msg_wait_sem handles blocking for the non-core locking case,
so we can remove the manual blocking in netconn_gethostbyname. For the
core locking case, we need to block if waiting on DNS callback. To
achieve this, we unlock the core and wait in lwip_netconn_do_gethostbyname.
This is the similar approach that netconn_write takes when it needs to
block to continue the write (see lwip_netconn_do_write)
This improves performance in the core locking case and is no change
for the non-core locking case
TCP timestamps were only sent if the remote side
requested it first. This enables the use of timestamps
for outgoing connections as well.
Signed-off-by: goldsimon <goldsimon@gmx.de>
Changes for TCP Appropriate Byte Counting introduce a potential cwnd
rollover by not taking into account integer promotion on tcpwnd_size_t
during inequality comparisions
This fixes the issue by introducing a macro TCP_WND_INC which detects
the rollover correctly and now holds the tcpwnd_size_t at the maximum
value rather than not incrementing the window. This provides a slight
performance improvement by allowing full use of the tcpwnd_size_t number
space for the congestion window
etharp_query() queues packets, instead of sending, if a relevant arp-request is
pending.
Code walks the packet (a pbuf chain) to determine whether any pbufs are marked
'volatile': If so, we cannot simply enqueue the packet, and instead allocate a
new pbuf from RAM, copying the original packet, and enqueueing this new pbuf.
The bug here is that the allocation refers to the tot_len field of a temp pbuf*,
'p', instead of the head, 'q'.
In the case where the first pbuf of the chain is non-volatile but the second pbuf
*is* volatile, then we'll request an allocation that uses the tot_len field of
the second pbuf. If the first pbuf is non-zero length, the allocated pbuf (chain)
will be too small to allow the copy.
Signed-off-by: goldsimon <goldsimon@gmx.de>
All callers pass pbuf_type to pbuf_init_alloced_pbuf(), so make it take
pbuf_type instead of u8_t.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
netif->output and etharp_output are only available when LWIP_IPV4=1.
Fix the skeleton file.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
The lwip/arch.h already provides a default implentation of LWIP_PLATFORM_ASSERT
and LWIP_PLATFORM_DIAG.
So both LWIP_PLATFORM_ASSERT and LWIP_PLATFORM_DIAG are never undefined here.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Call smtp_free_struct(s) in all smtp_send_mail_alloced error paths to ensure
no memory leak.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
The pcb is "struct altcp_pcb *" so we cannot call tcp_sndbuf/tcp_write here.
Use altcp_sndbuf/altcp_write instead.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
This commit adds a timeout to the zero-window probing (persist timer)
mechanism. LwIP has not historically had a timeout for the persist
timer, leading to unbounded blocking if connection drops during the
zero-window condition
This commit also adds two units test, one to check the RTO timeout
and a second to check the zero-window probe timeout
We don't have to keep a helper function just for the sake of a PBUF_RAW
constant. Inline ppp_singlebuf function.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
pbuf_coalesce() creates a single pbuf out of a chain of pbufs, which is
exactly what ppp_singlebuf() need.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Fix below build error if LWIP_IPV4 == 0.
cc -g -Wall -DLWIP_DEBUG -pedantic -Werror -Wparentheses -Wsequence-point -Wswitch-default -Wextra -Wundef -Wshadow -Wpointer-arith -Wcast-qual -Wc++-compat -Wwrite-strings -Wold-style-definition -Wcast-align -Wmissing-prototypes -Wredundant-decls -Wnested-externs -Wno-address -Wunreachable-code -Wuninitialized -Wlogical-op -I. -I../../.. -I../../../../lwip/src/include -I../../../ports/unix/port/include -I../../../../mbedtls/include -Wno-redundant-decls -DLWIP_HAVE_MBEDTLS=1 -c ../../../../lwip/src/core/netif.c
../../../../lwip/src/core/netif.c: In function ‘netif_add’:
../../../../lwip/src/core/netif.c:284:7: error: ‘ipaddr’ undeclared (first use in this function)
if (ipaddr == NULL) {
^~~~~~
../../../../lwip/src/core/netif.c:284:7: note: each undeclared identifier is reported only once for each function it appears in
../../../../lwip/src/core/netif.c:285:14: error: implicit declaration of function ‘ip_2_ip4’ [-Werror=implicit-function-declaration]
ipaddr = ip_2_ip4(IP4_ADDR_ANY);
^~~~~~~~
../../../../lwip/src/core/netif.c:285:5: error: nested extern declaration of ‘ip_2_ip4’ [-Werror=nested-externs]
ipaddr = ip_2_ip4(IP4_ADDR_ANY);
^~~~~~
../../../../lwip/src/core/netif.c:285:23: error: ‘IP4_ADDR_ANY’ undeclared (first use in this function)
ipaddr = ip_2_ip4(IP4_ADDR_ANY);
^~~~~~~~~~~~
../../../../lwip/src/core/netif.c:287:7: error: ‘netmask’ undeclared (first use in this function)
if (netmask == NULL) {
^~~~~~~
../../../../lwip/src/core/netif.c:290:7: error: ‘gw’ undeclared (first use in this function)
if (gw == NULL) {
^~
cc1: all warnings being treated as errors
../../Common.allports.mk:94: recipe for target 'netif.o' failed
make: *** [netif.o] Error 1
Fixes: 5967380c20 ("netif_add: avoid passing NULL pointers to subsequent functions")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Current code fails to allocate zero length pbuf (e.g. for PBUF_RAW PBUF_POOL),
fix it.
Fixes: eb269e61b5 ("First step to clean up pbuf implementation: add pbuf_alloc_reference() to allocate pbufs referencing external payload; move member initialization to common function; simplify PBUF_POOL chain allocator")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
This changes the CMSG alignment macros to ensure struct cmsghdr and data
are on a word (double word on 16-bit arch) aligned boundary
We need to ensure at least 32-bit alignment for 16-bit systems because
socklen_t could be 32-bit due to our definition
This fixes build error if LWIP_NETIF_TX_SINGLE_PBUF==1.
Fixes: dd811bca06 ("Fix bug #50694 (TX exist more pbufs after enable LWIP_NETIF_TX_SINGLE_PBUF) by not executing phase 2 for LWIP_NETIF_TX_SINGLE_PBUF==1")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This commit adds CMSG infrastructure (currently used with recvmsg) and
the IP_PKTINFO socket option.
In order to use IP_PKTINFO, set LWIP_NETBUF_RECVINFO to 1
Unit test is added to verify this feature
This commit adds TCP Appropriate Byte Counting (ABC) support based on
RFC 3465
ABC replaces the previous congestion window growth mechanism and has been
configured with limit of 2 SMSS. See task #14128 for discussion on
defaults, but the goal is to mitigate the performance impact of delayed
ACKs on congestion window growth
This commit also introduces a mechanism to track when the stack is
undergoing a period following an RTO where data is being retransmitted.
Lastly, this adds a unit test to verify RTO period tracking and some
basic ABC cwnd checking
while ((q != NULL) && (options[offset] != DHCP_OPTION_END) && (offset < offset_max)) {
should be
while ((q != NULL) && (offset < offset_max) && (options[offset] != DHCP_OPTION_END)) {
See https://jira.reactos.org/browse/CORE-8978 for more info.
Before this patch, it was possible that the overflow check might
miss an overflow event.
e.g. Consider 2 threads, both executing this method. u8_t fd_used is on 255...
Thread A -> atomically increment fd_used (which is now 0)
Thread B -> atomically increment fd_used (which is now 1)
Thread A -> check overflow... sees everything ok
Thread B -> check overflow... sees everything ok
And the overflow is missed :(
Signed-off-by: goldsimon <goldsimon@gmx.de>
The NULL test no longer work after commit e0a2472706, it needs to test with
lwip_netconn_is_err_msg() instead.
Fixes: e0a2472706 ("netconn/sockets: remove fatal error handling, fix asynchronous error handling, ensure data before RST can be received")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This sets the pbuf's if_idx during the loopif poll function (the
equivalent netif input function). This was found during IP_PKTINFO
development where p->if_idx is read and was uninitialized
This creates a single version of test IP addresses, netmasks, and ports.
All tests were using the same values, but duplicated in each test
This also adds const to some functions so we can use a const version
of addresses
This commit moves common defines and senqo array so they can be
re-used in mulptiple places for sequence number checking rather
than duplicated
Currently they are used in two places, but I'm anticipating needing
them in future TCP unit tests
This commit corrects what looks like an ancient incorrect organization
of the logic for processing an ACK which acks new data. Once moved,
we can also change to using TCP_SEQ_LEQ on ackno instead of TCP_BETWEEN
because ackno has already been checked against snd_nxt
The work of checking the unsent queue and updating pcb->snd_buf (both
steps required for new data ACK) should be located under the conditional
that checks TCP_SEQ_BETWEEN(ackno, pcb->lastack+1, pcb->snd_nxt)
The comment following the unsent queue check/pcb->snd_buf update even
indicates "End of ACK for new data processing" when the logic is clearly
outside of this check
From what I can tell, this mis-organization isn't causing any incorrect
behavior since the unsent queue checked that ackno was between start of
segment and snd_nxt and recv_acked would be 0 during pcb->snd_buf update.
Instead this is waisted work for duplicate ACKS (can be common) and other
old ACKs
Introduce a new configuration define SNTP_COMP_ROUNDTRIP to compensate
for network round-trip delays when setting the system clock from SNTP.
Note that this feature requires compiler support for 64-bit arithmetic.
Avoid piecemeal invocation of pbuf_copy_partial() for each SNTP header
field. The new code may sometimes copy more than necessary, but the
complexity is reduced.
Generalize the NTP timestamp conversion arithmetic, and provide hooks
for using native NTP timestamps when setting or getting the system
clock time. Convert microseconds to a fraction as needed when getting
the system time.
In unit test if_fail check for nullptr
is always located after dereferencing this
null pointer. This patch introduces correct
order: first check, then use
altcp is an abstraction layer that prevents applications linking against the
tcp.h functions but provides the same functionality. It is used to e.g. add
SSL/TLS or proxy-connect support to an application written for the tcp callback
API without that application knowing the protocol details.
Applications written against the altcp API are directly linked against the
tcp callback API for LWIP_ALTCP==0, but then cannot use layered protocols.
This code is marked as dead when BUF_SZ is a multiple of 4 (current
situation with unit tests)
This hopefully fixes a -Wunreachable-code failure found by Travis CI
This migrates the sendmsg TCP test from socket examples (task #14408)
to socket unit tests
Additionally, this adds support for testing recvmsg, creating a TCP
test for both sendmsg/recvmsg (referred to as msgapi test)
This also makes a small change to msgapi UDP to clear the receive
buffer after verifying the previous datagram
Using {0} broke Travis CI even though this should be correct for
initializing struct msghdr (see example in Linxu man pages:
http://man7.org/linux/man-pages/man3/cmsg.3.html)
Just use memset for now which is the common approach in LwIP codebase
This converts the sendmsg test to use recvmsg for receiving, thus
exercising both sendmsg and recvmsg in a single test
This also adjusts the test naming to communicate all message APIs
(sendmsg/recvmsg) are being tested
This commit moves the sendmsg UDP test from socket examples to socket
unit tests
The test has been converted to send/receive on the loopback interface
and also test a connected sendmsg with NULL msg_name
test_tcp_fast_rexmit_wraparound correctness relied on the congestion
window being in congestion avoidance so that only a single TCP_MSS
segment is sent upon ACKing the first segment.
It's not known whether the test was relying tcp_alloc() to set ssthresh
to 0 and thus start in congestion avoidance or if the test was working by
accident until changes in b90a54f989
This fixes the test by enforcing the requirement of starting in
congestion avoidance
Signed-off-by: goldsimon <goldsimon@gmx.de>
If a locally generated TCP SYN packet is replied to with an ACK
packet, lwIP immediately sends a RST packet followed by resending the
SYN packet. This is expected, but on loopback interfaces the resent
SYN packet may immediately get another ACK reply, typically when the
other endpoint is in TIME_WAIT state (which ignores the RSTs). The
result is an endless loop of SYN, ACK, RST packets.
This patch applies the normal SYN retransmission limit in this
scenario, such that the endless loop is limited to a brief storm.
This commit changes ssthresh to be the largest effective congestion
window (amount of in-flight data). This follows the guidance of RFC
5681 which recommends setting ssthresh arbitrarily high.
LwIP was previously using the receive window value at the end of the
3-way handshake and in the case of an active open where the receiver
used window scaling and/or window auto-tuning, this resulted in a very
small ssthresh value even though the window ramped up once the connection
was established
User should not use ppp_connect or ppp_listen return value to retry
later, it must wait for the callback to be called. This is primarily
done this way to have a consistent behavior with and without the
holdoff feature.
Remove returned error value from PPP link level API connect and listen
callbacks because we are not using them anymore, then make ppp_connect
or ppp_listen to always return ERR_OK, thus we are not breaking the PPP
user API.
We don't need the return code here, all PPP link level drivers can't
fail at all (e.g. PPPoS) or retry if necessary (PPPoE and PPPoL2TP).
A bug was introduced in the atomic vector feature for blocking netconns
where if we couldn't write the entire vector due to send buffer being
full (write_more is 0), we would not update the vector state and then
when sent_tcp() is called, it would actually re-send the previous vector
and if additional calls were required to finish the write, msg.w.offset
would eventually exceed msg.w.len, This was found by testing "stats"
from the shell and hitting the LWIP_ASSERT in do_writemore() that
checks offset < len
The fix simply updates the vector state after every ERR_OK return from
tcp_write(). While not all cases (non-blocking sockets) need to update
the state in this case, it keeps the logic simple and also makes
debugging simpler because you don't have stale vector state at any
point
This commit adds support to the netconn write APIs to take an input of
vectors instead of a single data pointer
This allows vectors sent on a TCP connection via sendmsg to be treated
atomically. The set of vectors is segmented into as much data as can
fit into the send buffer and then the TCP output function is called
Previously, each vector was passed to netconn_write_partly and tcp_write
segmented it into its own packet, which was then it was sent via
tcp_output (if not Nagleing)
This commit adds vector support to lwip_netconn_do_writemore() which
is the meat of the TCP write functionality from netconn/sockets layer.
A new netconn API netconn_write_vectors_partly() takes a set of vectors
as input and hooks up to do_writemore()
This commit also defines IOV_MAX because we are limited to only
supporting 65535 vectors due to choice of u16_t for the vector count
Create new function dhcp_release_and_stop() that stops DHCP statemachine and sends release message if needed. Also stops AUTOIP if in coop mode.
Old dhcp_release() and dhcp_stop() function internally call dhcp_release_and_stop() now.
lwIP aims to support zero-copy TX, and thus, must internally handle
all cases that pbufs are referenced rather than copied upon low-level
output. However, in the current situation, the arp/ndp packet queuing
routines conservatively copy entire packets, even when unnecessary in
cases where lwIP is used in a zero-copy compliant manner. This patch
moves the decision whether to copy into a centralized macro, allowing
zero-copy compliant applications to override the macro to avoid the
unnecessary copies. The macro defaults to the safe behavior, though.
This commit changes netconn_write_partly to use msg.w.offset to set
bytes_written for both blocking and non-blocking connections
This is correct because msg.w.offset is the canonical output from
the do_write call and in the case that not all bytes were written,
(a bug?) returning the full size to the caller is dangerous
Lastly, this commit adds an assert for the blocking case to sanity
check that all the bytes we requested were written. This will help
catch bugs in do_write
This commit makes a couple of cleanups discussed in patch #8882:
1) msg.w.offset should not be set to 0 in the error case. It is
only valid when err == ERR_OK
2) Remove out-of-date comment which indicated the entire write had
completed (not true for non-blocking write)
This also updates the documentation on offset to include that offset
is only valid when err == ERR_OK
This moves the write_offset variable from struct netconn to struct api_msg
This optimizes the storage by only having the space claimed when it is
needed (during a netconn_write_partly() call) and not throughout the
lifetime of the netconn
This also reduces code space/execution by not having to separately manage
clearing/checking write_offset from the current_msg pointer
Lastly, we also save execution by using msg.w.offset as the output
rather than marshaling the result to msg.w.len. Previously, len was used
as input length of dataptr and output for the write operation.
netconn_write_partly() also has access to msg.w.offset, so we can use
that
The forward declaration was added in commit
e2c2afbbe0 for use in struct
lwip_setgetsockopt_data, but became dead after commit
5d2e93e5f0 where the sock pointer was
removed from lwip_setgetsockopt_data
The patch simply copies the relevant bits from the UDP implementation.
Perhaps most notably, the patch does *not* copy the IPv4-only UDP
support for IP_MULTICAST_IF, because that option can also be
implemented using the interface index based approach. Largely thanks
to this omission, at least on 32-bit platforms, this patch does not
increase the RAW PCB size at all.
So far, the UDP core module implemented only IPv4 multicast support.
This patch extends the module with the features necessary for socket
layers on top to implement IPv6 multicast support as well:
o If a UDP PCB is bound to an IPv6 multicast address, a unicast source
address is selected and used to send the packet instead, as is
required (and was the case for IPv4 multicast already).
o Unlike IPv4's IP_MULTICAST_IF socket option, which takes a source
IPv4 address, the IPV6_MULTICAST_IF socket option (from RFC 3493)
takes an interface identifier to denote the interface to use for
outgoing multicast-destined packets. A new pair of UDP PCB API
calls, udp_[gs]et_multicast_netif_index(), are added to support
this. The new definition "NETIF_NO_INDEX" may be used to indicate
that lwIP should pick an interface instead.
IPv4 socket implementations may now also choose to map the given
source address to an interface index immediately and use the new
facility instead of the old udp_[gs]et_multicast_netif_addr() one.
A side effect of limiting the old facility to IPv4 is that for dual-
stack configurations with multicast support, the UDP PCB size is
reduced by (up to) 16 bytes.
o For configurations that enable loopback interface support, the IPv6
code now also supports multicast loopback (IPV6_MULTICAST_LOOP).
o The LWIP_MULTICAST_TX_OPTIONS opt.h setting now covers both IPv4
and IPv6, and as such is no longer strictly linked to IGMP. It is
therefore placed in its own lwIP options subgroup in opt.h.
The IPV6_MULTICAST_HOPS socket option can already be implemented using
the existing IP_MULTICAST_TTL support, and thus requires no additional
changes. Overall, this patch should not break any existing code.
If LWIP_CALLBACK_API is not defined, but TCP_LISTEN_BACKLOG is, then
the LWIP_EVENT_ACCEPT TCP event may be triggered for closed listening
sockets. This case is just as disastrous for the event API as it is
for the callback API, as there is no way for the event hook to tell
whether the listening PCB is still around. Add the same protection
against this case for TCP_LISTEN_BACKLOG as was already in place for
LWIP_CALLBACK_API.
Also remove one NULL check for LWIP_CALLBACK_API that had already
become redundant for all callers, making the TCP_EVENT_ACCEPT code
for that callback wrapper more in line with the rest of the wrappers.
This commit adds support in if_indextoname() to return ENXIO when
no interface is found. This conforms to the Open Group/RFC 3493
specification
In order to leverage errno set support, the set_errno macro from
sockets.c was moved to sockets_priv.h
This commit introduces a sockets_priv.h header for socket API internal
implementations intended to be used by sockets API C files, but not
applications
This commit moves struct lwip_setgetsockopt_data to the private header
because this is not part of the public sockets API, but needs to be
shared between sockets.c and memp.c
This header lays ground work for sharing other internal sockets types
/macros between API files (sockets.c and if_api.c)
Previously, on netifs with unrestricted MTUs (typically loopback
interfaces), it was possible to give a packet to the UDP/RAW API
calls that is so large that when prepending headers, the pbuf's
tot_len field would overflow. This could easily result in
undesirable behavior at lower layers, e.g. a crash when copying
the packet for later delivery.
This patch models such overflows as memory allocation errors, thus
resulting in clean failures. Checks have to be added in multiple
places to cover (hopefully) all cases.
This fixes the following build failure with MSVC 2013:
sockets.c(323): warning C4242: '=' : conversion from 'const u32_t' to 'u8_t', possible loss of data
This casts sin6_scope_id to a u8_t before calling ip6_addr_set_zone()
Having the variable namining ret for a pointer makes the code looks odd,
ret looks like a value variable. Rename ret to pcb.
Also simplify the code in the do {} while() loop.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Both of the multicast checks should be skipped if the address type
is unicast. This bug accidentally caused only one of them to be
skipped, resulting in some unnecessary performance overhead.
Reported by Axel Lin.
Couple of more cleanups for task #14314 involving includes:
1) if.h name should match if_api.c due to LwIP convention and history.
Standard if.h include can be used with compatibility header in
posix/net/if.h
2) API header (if.h) should not be included in core code. This include
has been eliminated by moving the definition of IF_NAMESIZE to
netif.h as NETIF_NAMESIZE. This is now the canonical definition
and IF_NAMESIZE just maps to it to provide the standard type
Now that tcp_connect() always determines the outgoing netif with a
route lookup, we can compute the effective MSS without doing the same
route lookup again. The outgoing netif is already known from one
other location that computes the MSS, so we can eliminate a redundant
route lookup there too. Reduce some macro clutter as a side effect.
This patch adds full support for IPv6 address scopes, thereby aiming
to be compliant with IPv6 standards in general and RFC 4007 in
particular. The high-level summary is that link-local addresses are
now meaningful only in the context of their own link, guaranteeing
full isolation between links (and their addresses) in this respect.
This isolation even allows multiple interfaces to have the same
link-local addresses locally assigned.
The implementation achieves this by extending the lwIP IPv6 address
structure with a zone field that, for addresses that have a scope,
carries the scope's zone in which that address has meaning. The zone
maps to one or more interfaces. By default, lwIP uses a policy that
provides a 1:1 mapping between links and interfaces, and considers
all other addresses unscoped, corresponding to the default policy
sketched in RFC 4007 Sec. 6. The implementation allows for replacing
the default policy with a custom policy if desired, though.
The lwIP core implementation has been changed to provide somewhat of
a balance between correctness and efficiency on on side, and backward
compatibility on the other. In particular, while the application would
ideally always provide a zone for a scoped address, putting this in as
a requirement would likely break many applications. Instead, the API
accepts both "properly zoned" IPv6 addresses and addresses that, while
scoped, "lack" a zone. lwIP will try to add a zone as soon as possible
for efficiency reasons, in particular from TCP/UDP/RAW PCB bind and
connect calls, but this may fail, and sendto calls may bypass that
anyway. Ultimately, a zone is always added when an IP packet is sent
when needed, because the link-layer lwIP code (and ND6 in particualar)
requires that all addresses be properly zoned for correctness: for
example, to provide isolation between links in the ND6 destination
cache. All this applies to packet output only, because on packet
input, all scoped addresses will be given a zone automatically.
It is also worth remarking that on output, no attempt is made to stop
outgoing packets with addresses for a zone not matching the outgoing
interface. However, unless the application explicitly provides
addresses that will result in such zone violations, the core API
implementation (and the IPv6 routing algorithm in particular) itself
will never take decisions that result in zone violations itself.
This patch adds a new header file, ip6_zone.h, which contains comments
that explain several implementation aspects in a bit more detail.
For now, it is possible to disable scope support by changing the new
LWIP_IPV6_SCOPES configuration option. For users of the core API, it
is important to note that scoped addresses that are locally assigned
to a netif must always have a zone set; the standard netif address
assignment functions always do this on behalf of the caller, though.
Also, core API users will want to enable LWIP_IPV6_SCOPES_DEBUG at
least initially when upgrading, to ensure that all addresses are
properly initialized.
This renames if.c to if_api.c in order to avoid using a common source
file name which may collide with other source files from non-LwIP
projects. See discussion in task #14314
The tests were in to catch user errors, but they seem to get in the way of application programming :-)
The checks in *_send() remain active to catch when PCB source and destination address types do not match
In file included from ../../../../lwip/src/include/lwip/sockets.h:49:0,
from ../../../../lwip/src/core/init.c:47:
../../../../lwip/src/include/lwip/errno.h:46:5: error:
"LWIP_PROVIDE_ERRNO" is not defined [-Werror=undef]
#if LWIP_PROVIDE_ERRNO
^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
../Common.mk:93: recipe for target 'init.o' failed
make: *** [init.o] Error 1
netif_ip6_addr_set_state() relies on being able to access the old
address on invalidation, for example in order to invalidate PCBs
and leave the correct solicited-node MLD group.
This commit cleans up the remaining instance of global variable
"index" shadowing caused by using local variables and function
parameters named "index"
These were introduced in the recent interface index API commits
Adjusts assert logic from 9c80a66253
to allow for a netif driver's init callback to manually override
the number. When the init function is taking care of the unique
assignment, the assert simply checks that a valid number was provided
This commit adds an LWIP_ASSERT to detect when netif_num overflows and
we no longer have unique numbers per netif. Unique netif numbers are
needed to support interface indexes (task #14314)
The only cases where this could occur are with a deployment that attempts
to use the maximum 256 netifs at the same time or where netifs are being
constantly adding and removed. Neither of these use cases fit the
lightweight goals of LwIP
See discussion in task #14314 for more details
- Code duplication with etharp_raw()
- No great effect on perfomance
- May make reworking PBUF handling code more complicated (see bug #49914)
- The check for p->type == PBUF_REF is a strange special case, too
- Simon also voted to remove it
../../../../lwip/src/core/ipv6/ip6_frag.c: In function ‘ip6_reass’:
../../../../lwip/src/core/ipv6/ip6_frag.c:567:7: error: ISO C90 forbids mixed declarations and code [-Werror=pedantic]
Eliminate ETHADDR32_COPY macro - it cannot be used in ETH_PAD_SIZE case. I could have kept it by defining it to ETHADDR16_COPY in case of ETH_PAD_SIZE, but I did not consider it worth another #ifdef mess.
Fix below compile error:
../../../../lwip/src/core/ipv6/ip6_frag.c: In function ‘ip6_reass’:
../../../../lwip/src/core/ipv6/ip6_frag.c:533:20: error: declaration of ‘next_pbuf’ shadows a previous local [-Werror=shadow]
struct pbuf* next_pbuf = iprh->next_pbuf;
^~~~~~~~~
../../../../lwip/src/core/ipv6/ip6_frag.c:272:20: note: shadowed declaration is here
struct pbuf *q, *next_pbuf;
^~~~~~~~~
cc1: all warnings being treated as errors
../Common.mk:93: recipe for target 'ip6_frag.o' failed
make: *** [ip6_frag.o] Error 1
Fixes: 7cedf7ae71 ("IPv6: fragment reassembly fixes")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This patch aims to fix three closely related issues.
o The implementation of IPV6_FRAG_COPYHEADER was fundamentally
incompatible with the presence of extension headers between the
IPv6 header and the Fragment Header. This patch changes the
implementation to support such extension headers as well, with
pretty much the same memory requirements. As a result, we can
remove the check that prevented such packets from being reassembled
in all cases, even with IPV6_FRAG_COPYHEADER off.
o Given that temporary data is stored in the Fragment Header of
packets saved for the purpose of reassembly, but ICMPv6 "Fragment
Reassembly Time Exceeded" packets contain part of the original
packet, such ICMPv6 packets could actually end up containing part
of the temporary data, which may even include a pointer value. The
ICMPv6 packet should contain the original, unchanged packet, so
save the original header data before overwriting it even if
IPV6_FRAG_COPYHEADER is disabled. This does add some extra memory
consumption.
o Previously, the reassembly would leave the fragment header in the
reassembled packet, which is not permitted by RFC 2460 and prevents
reassembly of particularly large packets (close to 65535 bytes
after reassembly). This patch gets rid of the fragment header. It
does require an implementation of memmove() for that purpose.
Note that this patch aims to improve correctness. Future changes
might restore some of the previous functionality in order to regain
optimal performance for certain cases (at the cost of more code).
- Move fsdata.h content to lwip/apps/fs.h -> no #include path needed any more to src/apps/httpd/
- Create a #define to specify fsdata file name. One can use path in there now, e.g. "../mywebserver/mkfsdata_output.c" -> no #include path needed any more to location of generated file
As per RFC requirements, upon removing a router from the default
router list, remove any entries pointing to it from the destination
cache. While here, synchronize timing out entries in the default
router list with the rest of the timer code.
When removing a netif, clear the destination cache altogether
in order to prevent more general inconsistency. When this happens,
the entries for other netifs will have to be rebuilt, but removing
netifs should be sufficiently rare that this is not worth optimizing.
The current ND implementation does not yet implement the most basic
required ('MUST') checks for message validation and generation.
- implement some of the required checks for message validation;
- document the remaining missing message validation checks;
- hardcode the hop limit of Neighbor Discovery messages rather than
having it depend on lwIP configuration which, if changed, would
cause all of ND to cease working.
The introduction of address lifetimes also means that lwIP correctly
supports transitions between PREFERRED and DEPRECATED address states,
and that means that the source address selection must be changed to
take this into account. Adding this feature to the previous algorithm
would have resulted in a mess, so this patch rewrites the algorithm to
stay close to the rules described in RFC 6724 (formerly 3484) Sec. 5.
This yields the following changes:
- Rule 2 ("prefer appropriate scope") is now fully implemented, most
importantly allowing larger-scope addresses to be picked if no
smaller-scope addresses are available (e.g., a global address may
now be used to connect to a unique-local address);
- Rule 3 ("avoid deprecated addresses") is now also fully implemented;
- unknown-scope addresses are also supported, with lowest priority;
- the link between the prescribed rules and the actual algorithm is
made much more explicit, hopefully allowing future improvements to
be made more easily.
For reasons explained in comments, one previous deviation from the RFC
on Rule 2 is retained for now.
As laid out in RFC 5942, the assumption that a dynamically assigned
(SLAAC/DHCPv6) address implies an on-link subnet, is wrong. lwIP does
currently make that assumption, routing packets according to local
address subnets rather than the on-link prefix list. The result is
that packets may not make it to their destination due to incorrect
routing decisions.
This patch changes the routing algorithms to be (more) compliant with
RFC 5942, by implementing the following new routing policies:
- all routing decisions check the on-link prefix list first, and
select a default router for off-link routing only if there is no
matching entry in the on-link prefix list;
- dynamically assigned addresses (from address autoconfiguration) are
considered /128 assignments, and thus, no routing decisions are taken
based on matches against their (/64) subnet anymore;
- more generally, all addresses that have a lifetime are considered
dynamically assigned and thus of size /128, which is the required
behavior for externally implemented SLAAC clients and DHCPv6;
- statically assigned (i.e., manually configured) addresses are still
considered /64 assignments, and thus, their associated subnet is
considered for routing decisions, in order to behave as generally
expected by end users and to retain backward compatibility;
- the link-local address in IPv6 address slot #0 is considered static
and thus has no lifetime and an implied /64 subnet, although link-
local routing is currently always handled separately anyway.
IPv6 source address selection is kept as is, as the subnet tests in
the algorithm serve as poor man's longest-common-prefix equivalent
there (RFC 6724 Sec. 5, Rule 8).
Previously, IPv6 routing could select a next-hop router on a netif
that was down or disconnected, potentially resulting in packets being
dropped unnecessarily. This patch changes router selection to take
into account the state of the router's associated netif, eliminating
such unnecessary packet loss.
Also, this patch fixes the test for router validity, which was
erroneously based on the router's invalidation timer rather than its
neighbor cache entry state. Given that an expired router has no
associated neighbor cache entry, no invalid routers would previously
ever be returned.
Finally, this patch also adds round-robin selection of routers that
are not known to be reachable or probably reachable, as per RFC 4861
Sec. 6.3.6 point (2). Support for this feature was partially present
but not actually functional.
For applications that use NETIF_STATUS_CALLBACK to help keep track of
extra per-address shadow state of IPv6 addresses, even in the light of
autogenerated addresses (which may "spontaneously" appear/disappear),
state transitions between tentative, duplicated, and invalid are
important as well. Therefore, invoke the status callback for all such
state transitions. Continue to filter out state changes between
various levels of progress of the tentative state, though.
Previously, Duplicate Address Detection (DAD) would work only for the
link-local address. For DAD-spawned Neighbor Solicitation requests for
any other address, the request would use the link-local address as the
source, meaning the other side would send a targeted reply (RFC 4861
Sec. 7.2.4). However, the nd6 implementation currently does not
consider targeted replies for DAD--even though technically an RFC 4862
Sec. 5.4.4 violation--supposedly because no real-world scenario could
trigger that case. The combination of these factors resulted in DAD
being entirely ineffective for non-link-local addresses.
This patch forces all DAD-spawned Neighbor Solicitation packets to use
the unspecified ('any') address as source, as per RFC 4862 Sec. 5.4.2.
As a result, other nodes would reply with multicast replies, for which
there is appropriate DAD checking code.
The patch also makes a slight rearrangement of statements such that
MLD join messages are sent before the NS packets, rather than after.
In the cases that nd6 checks whether the interface is up before
sending a packet, also check whether the link is up. Without this
additional check, temporary link downtime could easily result in
unnecessary false negatives for Duplicate Address Detection.
In addition, use the netif abstraction macros to perform the checks.
In summary, this patch aims to resolve bugs #47923 and #48162, by
decoupling address autoconfiguration from the on-link prefix list,
since those are not related. Important necessary changes are needed
to meet this goal, ultimately bringing the lwIP ND6 implementation
closer to compliance with RFC 4862. The main changes are:
1. support for address lifetimes, and,
2. addition of a new DUPLICATED address state.
The decoupling implies that the prefix list can no longer be used to
maintain state for address autoconfiguration. Most importantly, the
lifetime of each address, which was previously derived from the
prefix slot's lifetime, must now be associated with the address
itself. This patch implements address lifetime tracking, maintaining
both a valid and a preferred lifetime for each address, along with
the corresponding address state changes (e.g., between PREFERRED and
DEPRECATED), all as required by RFC 4862.
The support for address lifetimes can be enabled with a new
LWIP_IPV6_ADDRESS_LIFETIMES setting in lwipopts.h. It is required for
autoconfiguration and enabled by default if autoconfiguration is
enabled as well, but it may also be enabled separately, so as to allow
application-controlled lifetime management (e.g., if autoconfiguration
is implemented in a separate application). A special valid-lifetime of
zero is used to denote a static address--that is, an address that was
configured manually, that does not have lifetimes, and that should be
left alone by the autoconfiguration functionality. Addresses assigned
without setting a lifetime are deemed static, thus preserving
compatibility with existing lwIP-based applications in this respect.
Similarly, the decoupling implies that the prefix list can no longer
be used to remember cases of address duplication. Previously, the
detection of a duplicated address would simply result in removal of
the address altogether. Instead, this patch introduces a new state
"DUPLICATED", indicating that the address, while technically still
present, has been found to conflict with other node addresses, and no
attempt should be made to produce an autoconfiguration address for
that prefix.
Manually added addresses, including the link-local address, once set
to DUPLICATED, will remain in that state until manual intervention.
Autoconfigured DUPLICATED addresses will expire according to their
valid-lifetime, essentially preserving the current behavior but
without the use of the prefix list. As a first attempt to approach
compliance with RFC 4862 Sec. 5.4.5, if the link-local address is
detected to be duplicated, all derived addresses are marked duplicated
as well, and no new addresses will be autoconfigured. More work is to
be done for full compliance with that section, however.
Together, those two main changes indeed do fully decouple address
autoconfiguration from the on-link prefix list. Changes to the latter
thus no longer affect the former, resolving bug #47923. Moreover, as a
result, autoconfiguration can, and does, now also take place on
advertised prefixes that do not have the on-link flag set, resolving
bug #48162. The routing changes mentioned in the discussion of that
bug are left to a separate patch, though.
This patch adds a new RAW_FLAGS_HDRINCL flag to the raw core
implementation. When this flag is set on a RAW PCB, the raw send
routines expect the caller to supply an IP header for the given
packet, and will use that IP header instead of prepending one to
the packet themselves.
This feature allows the IP_HDRINCL socket option to be implemented
in higher layers with no further effort. Even thoguh that option is
traditionally supported for IPv4 sockets only (e.g., see RFC 3542
Sec. 3), the RAW_FLAGS_HDRINCL flag supports both IPv4 and IPv6, as
much of the lower-level infrastructure was already in place anyway.
Similar to the core UDP API, the new function may be used to implement
IPV6_PKTINFO (RFC 3542 Sec. 4), for example. This patch makes no
further functional changes; it merely moves code around a bit.
The support for connecting raw sockets is extended to match the
support for UDP sockets, while keeping the current API unchanged:
- for connected sockets, filter incoming packets on source address;
- use a flag to indicate whether a socket is connected, at no extra
memory cost; the application may check this flag if needed;
- added raw_disconnect(), which so far existed in documentation only.
The boolean condition of setting the WILL flag differs from that of appending the will message
Found by Axel Lin
(I fixed it the same way as Axel suggested, but I wanted a different commit message)
The caller of tcp_listen_with_backlog_and_err() usually check if the return
pcb is NULL before checking the err reason. I think the commit adding
tcp_listen_with_backlog_and_err() accidently change the behavior, Fix it.
Fixes: 98fc82fa71 ("added function tcp_listen_with_backlog_and_err() to get the error reason when listening fails")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This is a mqtt client, so it does not make sense to determinate the server port
at compile time. Update mqtt_client_connect() function to allow setting server
port.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
If MLD support is enabled, each locally assigned IPv6 address in the
appropriate state must be a member of the solicited-node multicast
group corresponding to that address. Ensure that this is always the
case by (re-)deciding on the membership upon every address state
change. By doing so, this patch enforces that user-initiated state
changes to addresses (e.g., deletion) never cause a desynchronization
with the corresponding solicited-node multicast group membership,
thereby making such user-initiated state changes simpler and safer.
The code in the for loop checks tmp_group->next == group, so current code
actually checks from the 3rd entry in the linked groups list. Fix it.
Fixes: 5c1dd6a4c6 ("Optimization in igmp_remove_group() pointed out by Axel Lin")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This commit adds support for responding to a zero-window probe when
the refused_data pointer is set
A zero-window probe is a data segment received when rcv_ann_wnd
is 0. This corrects a standards violation where LwIP would not
respond to a zero-window probe with its current ACK value (RCV.NXT)
when it has refused data, thus leading to the probing TCP closing
out the connection
lwIP produces a TCP Initial Sequence Number (ISN) for each new TCP
connection. The current algorithm is simple and predictable however.
The result is that lwIP TCP connections may be the target of TCP
spoofing attacks. The problem of such attacks is well known, and a
recommended ISN generation algorithm is standardized in RFC 6528.
This algorithm requires a high-resolution timer and cryptographic
hashing function, though. The implementation (or best-effort
approximation) of both of these aspects is well beyond the scope of
lwIP itself.
For that reason, this patch adds LWIP_HOOK_TCP_ISN, a hook that
allows each platform to implement its own ISN generation using
locally available means. The hook provides full flexibility, in
that the hook may generate anything from a simple random number
(by being set to LWIP_RAND()) to a full RFC 6528 implementation.
Implementation note:
Users of the hook would typically declare the function prototype of
the hook function in arch/cc.h, as this is the last place where such
prototypes can be supplied. However, at that point, the ip_addr_t
type has not yet been defined. For that reason, this patch removes
the leading underscore from "struct _ip_addr", so that a prototype
of the hook function can use "struct ip_addr" instead of "ip_addr_t".
Signed-off-by: sg <goldsimon@gmx.de>
Fix below build error when LWIP_ND6_RDNSS_MAX_DNS_SERVERS == 0
../../../../lwip/src/core/ipv6/nd6.c: In function ‘nd6_input’:
../../../../lwip/src/core/ipv6/nd6.c:400:10: error: unused variable ‘rdnss_server_idx’ [-Werror=unused-variable]
u8_t rdnss_server_idx = 0;
^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
../Common.mk:93: recipe for target 'nd6.o' failed
make: *** [nd6.o] Error 1
Fixes: 6b1950ec24 ("nd6: add support for RDNSS option (as per RFC 6106)")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Previously, ethip6 and lowpan6 each had their own copy of code that
used internal nd6 data structures to decide whether to send a packet
on the local link right away, or queue it while nd6 performed local
address resolution. This patch moves that code into nd6, thereby
eliminating all remaining cases of external access to internal nd6
data structures, as well as the need to expose two specific nd6
functions.
As a side effect, the patch effectively fixes two bugs in the lowpan6
code that were already fixed in the ethip6 code.
This patch rearranges the code division between nd6.c and ip6.c such
that the latter does not need to access ND6-internal data structures
(specifically, "default_router_list") directly anymore.
The new function, while currently not used internally, allows external
code to clear the ND destination cache in the case that it may have
become inconsistent with the current situation, for example as the
result of a change of locally assigned addresses, or a change in
routing tables implemented through the LWIP_HOOK_ND6_GET_GW hook.
On failure, nd6_get_next_hop_entry() returns an ERR_ type negative
error code. ethip6_output() erroneously assumed that that error would
always be ERR_MEM, even though it may also be ERR_RTE in practice.
With this patch, ethip6_output() simply forwards the returned error.
ppp/utils.c: In function 'ppp_vslprintf':
ppp/utils.c:251:12: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
val = (unsigned long) va_arg(args, void *);
^
This is because a void* type is casted into an unsigned long type,
which obviously isn't correct on LLP64 systems such as Windows.
Actually, we are not using %p, thus we remove %p support completely
instead of trying to fix the issue in unused code.
The variable i is equal to q->len after exit the for loop.
Check the received data should not change the logic of update packet_idx.
So let's simplify the code a bit.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Art says:
pppos_input() can call ppp_input() which can call pppos_disconnect() to
disconnect the interface. However, it will continue to read in
characters and allocate a pbuf from the PBUF_POOL and keep it in
pppos->in_head and in_tail. When a re-connect happens and pppos_connect()
is called, this pppos->in_head and in_tail are zeroed, hence a memory
leak. (This happens with PPP_INPROC_IRQ_SAFE not defined.)
A fix would be inside pppos_input() to break out of the loop inputting
characters after calling ppp_input() if pppos->open == 0. Note that
the loop is not even entered if pppos->open == 0.
ppp_input(ppp, inp);
if(pppos->open == 0) //get out if they disconnected
break;
Fix it in a similar way which doesn't add new code by moving the
existing pppos->open check inside the byte loop.
This commit increments the ip.drop statistic when an IP packet is
dropped due to no matching netif found and forwarding is disabled
This adds parity to the other places where mib2.ipinaddrerrors and
mib2.ipindiscards are incremented which also increment ip.drop
All the reset part of the code accessing netif->loop_first has lock protection,
the only missing part is "while (netif->loop_first != NULL)".
Fix it by adding lock protect around the while loop.
Also convert the code to use while{} loop instead of do .. while{} loop,
then we can avoid NULL test for in pointer in each loop and reduce a level of indent.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This file had the x bit set.
But executing it produced an error, since it was
missing the "#!/bin/sh" line.
This patch adds the "#!/bin/sh" line and makes generate.sh directly executable.
While TCP_OVERSIZE works only when tcp_write() is used with
TCP_WRITE_FLAG_COPY, this new code achieves
similar benefits for the use case that the caller manages their own
send buffers and passes successive chunks of those to tcp_write()
without TCP_WRITE_FLAG_COPY.
In particular, if a buffer is passed to
tcp_write() that is adjacent in memory to the previously passed
buffer, it will be combined into the previous ROM pbuf reference
whenever possible, thus extending that ROM pbuf rather than allocating
a new ROM pbuf.
For the aforementioned use case, the advantages of this code are
twofold:
1) fewer ROM pbufs need to be allocated to send the same data, and,
2) the MAC layer gets outgoing TCP packets with shorter pbuf chains.
Original patch by Ambroz Bizjak <ambrop7@gmail.com>
Edited by David van Moolenbroek <david@minix3.org>
Signed-off-by: goldsimon <goldsimon@gmx.de>
This corrects a case in lwip_netconn_do_writemore() where if a
non-blocking socket receives ERR_MEM in a call to tcp_write(), it would
return ERR_MEM, which would result in ENOMEM coming out of the socket
layer
This case can be gracefully handled by returning ERR_WOULDBLOCK since the
socket is already marked as no longer writable and sent_tcp/poll_tcp will
mark the socket as writable again based on available buffer space
This is very similiar to how ERR_MEM is resolved for blocking sockets
Change lwIP UDP API to match socket behavior. Multicast traffic is now only received on a UDP PCB (and therefore on a UDP socket/netconn) when the PCB is bound to IP_ADDR_ANY.
Generally speaking, packets with a loopback destination address -
127.0.0.1 for IPv4 and ::1 for IPv6 - should not be accepted on
non-loopback interfaces. For IPv4, this is implied by RFC 1122
Sec. 3.2.1.3. For IPv6, it is mandated by RFC 4291 Sec. 2.5.3.
Failure to perform this filtering may have security implications, as
applications that bind sockets to loopback addresses may not expect
that nodes on the local external network be able to produce traffic
that will arrive at such sockets.
With this patch, lwIP drops packets that are sent to a loopback
address but do not originate from the interface that has the loopback
address assigned to it. This approach works regardless of whether it
is lwIP or the system using it that implements a loopback netif. The
only exception that must be made is for configurations that enable
netif packet loopback but disable the lwIP loopback netif: in that
case, loopback packets are routed across non-loopback netifs and would
thus be lost by the new filter as well.
For IPv6, loopback-destined packets are also no longer forwarded; the
IPv4 forwarding code already had a check for that.
As a small performance improvement, the IPv6 link-local/loopback
address check is now performed only once per packet rather than
repeatedly for every candidate netif.
In general, netif_default may be NULL, and various places in the code
already check for this case before attempting to dereference the
netif_default pointer. Some places do not perform this check though,
and may cause null pointer dereferences if netif_default is not set.
This patch adds NULL checks to those places as well.
It is better to present correct IP types in netconn API.
Netconn API now accepts IPv6 mapped IPv4 addresses as well as IPv6 and IPv4 in send(), bind() and connect(), but does NOT map IPv4 to IPv6 mapped IPv4 in getaddr() and receive() functions.
bind() may change IP type when previous type is IPADDR_TYPE_ANY
connect() IP type must exactly match bind IP type
Use correct IPADDRx_ANY type when calling ip_route()
IPv6 netconns are created as IPADDR_TYPE_ANY raw/udp/tcp PCBs internally
bind, connect and sendto now accept IPv6 mapped IPv4 addresses or IPv4 addresses as argument
getaddr and receive functions now return IPv6 mapped IPv4 addresses instead of IPv4 addresses
This behavior is close to BSD socket API
This commit returns LwIP to previous behavior where if the next unsent
segment can't be sent due to the current send window, we start the
persist timer. This is done to engage window probing in the case that
the subsequent window update from the receiver is dropped, thus
preventing connection deadlock
This commit refines the previous logic to only target the following case:
1) Next unsent segment doesn't fit within the send window (not
congestion) and there is some room in the window
2) Unacked queue is empty (otherwise data is inflight and the RTO timer
will take care of any dropped window updates)
See commit d8f090a759 (which removed this
behavior) to reference the old logic. The old logic falsely started the
persit timer when the RTO timer was already running.
This commit cleans up a duplicate #if check for LWIP_WND_SCALE in init.c
which was already under #if LWIP_WND_SCALE
This commit also improves documentation for TCP_WND in the window scaling
case to communicate TCP_WND is always the calculated (scaled) window value,
not the value reported in the TCP header
Our developers were confused by having to set both the window and scaling
factor and only after studying the usage of TCP_WND throughout the code, was
it determined to be the calculated (scaled) window
This is done in the pppd upstream and was disabled because we don't have
the allowed addresses list required for the auth_ip_addr function.
This is mostly necessary for PPP in server mode to prevent the peer to
use the IP address it wants instead of the one we want, which is
currently allowed.
Rewrite auth_ip_addr in a simple way where we forbid PPP peer to use
loopback net, a multicast address or a reserved class address. Added
to that we consider that PPP in server mode with peer required to
authenticate must provide the peer IP address, reject any IP address
wanted by peer different than the one we wanted. This is actually
an allowed addresses "list" of one entry that follows what is done
in the unused auth_ip_addr function.
Commit 7df5496e7b revealed a regression introduced in commit 5a71509353
which broke IPCP reset state.
ask_for_local was set to 0 if ouraddr initial value is 0, if
ask_for_local was false go->ouraddr was cleared in reset callback,
commit 5a71509353 breaks it by removing this clearing. This regression
was silent because the whole ppp pcb runtime data was cleared before
reconnecting until commit 7df5496e7b which removed this giant clearing.
Fix it by reintroducing ask_for_local boolean value, with proper initial
value following what unused function ip_check_options do.
Fixes: 7df5496e7b ("PPP, rework initial/reconnect cleanup")
Fixes: 5a71509353 ("PPP, CORE, IPCP: removed useless ask_for_local boolean")
p needs to point to LWIP_MEM_ALIGN(memp_pools[i]->base) otherwise it will cause
assertion in overflow checking.
Fixes: c838e1ed5b ("Implement possibility to declare private memory pools")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
When memp_free_pool was split out from memp_free (c838e1ed5b),
the check for freeing the null pointer was lost.
This resulted in the null value being put back in the list of free
objects, causing all subsequent allocations of that type to fail.
The mld_group structure no longer has a 'netif' field, as such
structures are now linked from the corresponding netif structure.
For conditional checksumming, use the calling function's netif
reference instead.
Slightly improve readability by testing apiflags with NETCONN_DONTBLOCK.
Also remove an empty else clause.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This comment is incorrect since commit 7d0dab9d7d
"partly fixed bug #25882: TCP hangs on MSS > pcb->snd_wnd
(by not creating segments bigger than half the window)".
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This also fixes build error in non-debug build because err_strerr is
guarded by LWIP_DEBUG.
Fixes: a1c0a0185b ("bug #48823: posix errors should be removed from arch.h (to new file 'lwip/errno.h'))"
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Let lwip use functions/macros prefixed by lwip_ internally to avoid naming clashes with external #includes.
Remove over-complicated #define handling in def.h
Make functions easier to override in cc.h. The following is sufficient now (no more LWIP_PLATFORM_BYTESWAP):
#define lwip_htons(x) <your_htons>
#define lwip_htonl(x) <your_htonl>
TCP's snd_nxt represents the next sequence number after sent data, and
as such does not cover any unsent data queued on the connection. The
current implementation does not take the latter point into account
when processing FIN acknowledgments, mistakenly assuming that an
outgoing FIN is ACK'ed when the acknowledgment covers up to snd_nxt
while there is still unsent data. This patch adds a check for unsent
data to correct this, effectively preventing that TCP connections are
closed prematurely.
It is possible that the byte sent as a zero window probe is accepted
and acknowledged by the receiver side without the window being opened.
In that case, the stream has effectively advanced by one byte, and
since lwIP did not take this into account on the sender side, the
result was a desynchronization between the sender and the receiver.
That situation could occur even on a lwIP loopback device, after
filling up the receiver side's receive buffer, and resulted in an ACK
storm. This patch corrects the problem by advancing the sender's next
sequence number by one as needed when sending a zero window probe.
delay_time and stale_time are ticks now.
reachable_time and invalidation_timer are untouched since they may originate from telegram values -> not converting them to ticks avoids an integer division
commit 8c52afb6ca ("igmp: Optimize code by always skipping the first entry in the linked groups list - it is always the "allsystems" entry")
accidently changes the code logic. it should check groupref rather than group.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reasoning:
- Makes code in single-netif case perform better and smaller
- IGMP / MLD6 code is a little bit easier to read and understand
- Easier to get multicast groups per netif when implementing drivers
Downside: In multi-netif mode, there are two more pointers on each netif, even if IGMP/MLD6 is not used on it. But these systems should not be so memory-constrained that this will matter.
In a dual stack configuration it is not really feasible to wait
until the IPv4 address is valid before starting the mDNS responder.
If there is no DHCPv4 server in the network, the IPv4 address may
never become valid, which should however not preclude IPv6 mDNS
from working.
When leaving a multicast group, remove the group from the list
before invoking the MAC filter callback. This avoids the need
for the callee to skip over the group that is about to be deleted.
This commit adds support to the sanity checks in init.c to ensure that
PBUF_POOL is in use
In ports with drivers/netifs that use PBUF_REF for the RX pathway, there
is no need for the PBUF_POOL memory pool. This allows the port to define
PBUF_POOL_SIZE to 0
This corrects documentation on TCP_OOSEQ_MAX_BYTES and _PBUFS to list
their dependency on TCP_QUEUE_OOSEQ==1 (out of order sequence queueing
enabled) rather than ==0 (disabled)
Change macro signature to be universal: netif, pbuf, src, dst, eth_type - whatever the user needs to decide about VLAN header.
Return value <0 means "no VLAN header", 0 <= return_value <= 0xFFFF -> value is prio_vid of header.
Clean up ethernet_output function to be more readable.
commit 44e1a2d8e2 accidently includes below changes in tcp_listen_with_backlog
- tcp_backlog_set(lpcb, backlog);
+ lpcb->backlog = backlog;
Thus pass 0 to the backlog parameter of netconn_listen_with_backlog() fails.
Fixes: 44e1a2d8e2 ("define tcp_backlog_set() as dummy-define when backlog feature is disable")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
Use memset to zero the allocated memory rather than explicitly init each field.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
MEMP_SANITY_REGION_BEFORE and MEMP_SANITY_REGION_AFTER can be overridden in
lwipopts.h, if one of it is set to 0 we got build error due to unused variable.
Fix unused variable build error when MEMP_OVERFLOW_CHECK >= 1 &&
(MEMP_SANITY_REGION_BEFORE == 0 || MEMP_SANITY_REGION_AFTER == 0).
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
There is only one caller using memp_overflow_init(), and at that context
calling memp_overflow_init_element() actually simplifes the code.
Thus remove memp_overflow_init() function.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
Fix below build errors:
In file included from ../../../../../lwip/src/include/netif/ppp/ppp_opts.h:31:0,
from ../../../../../lwip/src/netif/ppp/pppoe.c:71:
../../../../../lwip/src/netif/ppp/pppoe.c: In function ‘pppoe_timeout’:
../../../../../lwip/src/netif/ppp/pppoe.c:861:30: error: ‘ethbroadcast’ undeclared (first use in this function)
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
^
../../../../../lwip/src/include/lwip/opt.h:137:52: note: in definition of macro ‘MEMCPY’
#define MEMCPY(dst,src,len) memcpy(dst,src,len)
^
../../../../../lwip/src/netif/ppp/pppoe.c:861:30: note: each undeclared identifier is reported only once for each function it appears in
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
^
../../../../../lwip/src/include/lwip/opt.h:137:52: note: in definition of macro ‘MEMCPY’
#define MEMCPY(dst,src,len) memcpy(dst,src,len)
^
../../../../../lwip/src/netif/ppp/pppoe.c: In function ‘pppoe_connect’:
../../../../../lwip/src/netif/ppp/pppoe.c:899:24: error: ‘ethbroadcast’ undeclared (first use in this function)
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
^
../../../../../lwip/src/include/lwip/opt.h:137:52: note: in definition of macro ‘MEMCPY’
#define MEMCPY(dst,src,len) memcpy(dst,src,len)
^
../../Common.mk:94: recipe for target 'pppoe.o' failed
make: *** [pppoe.o] Error 1
Fixes: 8eb9db18a2 ("Reduce usage of netif/ethernet.h header, mostly lwip/prot/ethernet.h is sufficient")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
Use LWIP_MEM_ALIGN() in memp_overflow_init() to get alignment address for memp.
This fixes assertion in memp_overflow_check_element_overflow when
MEMP_OVERFLOW_CHECK is set.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Fix below build error.
../../../../../lwip/src/core/memp.c: In function ‘memp_free’:
../../../../../lwip/src/core/memp.c:490:31: error: request for member ‘tab’ in something not a structure or union
old_first = memp_pools[type].tab;
^
../../Common.mk:94: recipe for target 'memp.o' failed
make: *** [memp.o] Error 1
Fixes: de9054cb7a ("memp: cleaned up MEMP_MEM_MALLOC")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The check for link up was missing, meaning valid LCP echo request/reply
packets are filtered whatever the PPP state is, despite what the comment
says.
Fix it by checking the PPP state as we would like to have done when it
was written.
During documentation updated LWIP_MEMPOOL_PROTOTYPE was moved inside
"#if MEMP_MEM_MALLOC" which cause ppp build to break. This patch fix that
issue.
ref commit-id: 2f950a7dcc
Signed-off-by: Ajay Bhargav <contact@rickeyworld.info>
VJ packets, Compressed packets, IPv4 and IPv6 packets are useless in
the PPP packet dump. We properly filtered IPv4 and IPv6 packets but
we forgot filtering VJ and Compressed packets.
Improve the filtering rule to filter packets which are not auth
protocol (< 0xC000) and which are not control protocol (0x8000 bit
not set).
I have below code in my cc.h:
#ifdef MYSDK_LWIP_DEBUG
#define LWIP_PLATFORM_ASSERT(x) MYSDK_ASSERTION_FAIL_ACTION()
#else
#define LWIP_PLATFORM_ASSERT(x)
#endif /* ifdef MYSDK_LWIP_DEBUG */
I got below error when in non-debug build:
src/include/lwip/debug.h:76:32: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
LWIP_PLATFORM_ASSERT(message); } while(0)
^
Fix the build error by adding braces around empty body in an 'if' statement.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: sg <goldsimon@gmx.de>
If LCP is not started yet, we are only closing the link protocol, in
this case we have to set the disconnect state ourself because PPP
is not actually started yet.
Include stdlib.h to fix below build warnings when MEM_LIBC_MALLOC is set:
src/core/mem.c:119:3: warning: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
void* ret = mem_clib_malloc(size + MEM_LIBC_STATSHELPER_SIZE);
^
src/core/mem.c:96:25: warning: incompatible implicit declaration of built-in function 'malloc'
#define mem_clib_malloc malloc
^
src/core/mem.c:119:15: note: in expansion of macro 'mem_clib_malloc'
void* ret = mem_clib_malloc(size + MEM_LIBC_STATSHELPER_SIZE);
^
src/core/mem.c: In function 'mem_free':
src/core/mem.c:146:3: warning: implicit declaration of function 'free' [-Wimplicit-function-declaration]
mem_clib_free(rmem);
^
src/core/mem.c:93:23: warning: incompatible implicit declaration of built-in function 'free'
#define mem_clib_free free
^
src/core/mem.c:146:3: note: in expansion of macro 'mem_clib_free'
mem_clib_free(rmem);
^
Signed-off-by: Axel Lin <axel.lin@ingics.com>
pppoe_softc_list is always not null when pppoe_find_softc_by_session is
called, furthermore pppoe_softc_list being null here does not hurt.
session is still checked whatsoever in pppoe_find_softc_by_session,
prechecking the session value for a value which can't really happen
except for forged frames does not add any value.
Remove unnecessary cleanup at the end of session, cleanup as much as
possible in the connect callback instead. It follows what PPPoE is
currently doing and it makes everything simpler to read.
Instead of relying on cleanup at the end of session, cleanup as much as
possible in the connect callback. It removes duplicated code and make
everything simpler to read.
While we are at it, remove useless initialization code from create
and connect functions.
ppp_close might try to close LCP even if LCP is not started, it happens
because because the PPP session might be waiting for the link protocol
to come up and we do not check that.
We say in the PPP documentation that ppp_close() can be called anytime,
so, if link protocol is currently trying to connect, we must cancel
the link connection.
Fix it by calling the link protocol disconnect callback if LCP is not
started yet.
Disconnect callback does not currently support a disconnect event while
initiation is in progress. Retry timer is not stopped and PADT frame is
sent whatever the current state is. PADT frame can only be sent if we
received a PADS frame, otherwise sc_session is 0 and sending a PADT
frame is meaningless.
Fix both issues to allow calling the disconnect callback whatever the
PPPoE state is.
We say in the PPP documentation that ppp_close() can be called anytime,
as of today, this is not entirely true, there are still conditions that
are not handled properly.
If PPP is already disconnecting, ppp_close() must do nothing and returns
ERR_INPROGRESS instead of messing up the PPP disconnection state.
Master state is almost exactly the same thing as dead state, move it
next to dead state. Holdoff state is actually the state just before
initialize, move it before initialize.
The goal is to be able to use > running or => terminate condition to
check a currently running disconnection phase, which is not possible
today without excluding master and holdoff states.
PPP_PHASE_MASTER state is only used if multilink mode is enabled. Since
we don't support multilink mode checking for this state only add some
code for no value added at all.
Build-out PPP_PHASE_MASTER state check if multilink mode is disabled.
Van Jacobson TCP header compression only apply if TCP is enabled,
therefore we need to disable VJ compression if TCP is disabled.
We already have conditions to enforce VJ disabling if IPv4 is disabled
or if PPPoS is disabled, add TCP to those conditions and remove
unecessary VJ_SUPPORT && LWIP_TCP conditions.
This function only set PPP to initialize phase, and it is only called at
the very beginning of functions where it is called. It means we could
as well set the initialize phase before calling those functions in the
PPP core.
PPP is currently in initialize phase until authentication is started
or until we start IPCP negotiation.
It works, because PPP states are mostly used for user information, most
state are actually useless for PPP itself. Being in initialize state
while PPP is started is not very consistent, switch to establish phase
before starting LCP.
sc->sc_ethif can't be NULL, it is set definitively in pppoe_create.
PPPoE can't by anything else than PADI sent in pppoe_send_padi, it
is only called when this is true.
PPPoE state can't be anything else than initial state in
pppoe_connect, this function is called from PPP core only when PPP
is in the dead phase, if PPP is in the dead phase it means the link
protocol is dead as well.
PPPoE can't be anything else than data phase in pppoe_disconnect
this function is only called by PPP core only when PPP session is up,
if PPP session is UP it means the link protocol is UP as well.
PPPoE can't by anything else than PADR sent in pppoe_send_padr, it
is only called when this is true.
PPPoE can't by anything else than PADO sent in pppoe_send_pado, it
is only called when this is true.
PPPoE can't by anything else than PADO sent in pppoe_send_pads, it
is only called when this is true.
PPPoE can't be anything else than session phase in pppoe_xmit,
function is only called by pppoe_write and pppoe_netif_output
which are both called by PPP core only when PPP session is up, if
PPP session is UP it means the link protocol is UP as well.
L2TP state can't be anything else than initial state in
pppol2tp_connect, this function is called from PPP core only when PPP
is in the dead phase, if PPP is in the dead phase it means the link
protocol is dead as well.
L2TP can't be anything else than data phase in pppol2tp_xmit, this
function is only called by pppol2tp_write and pppol2tp_netif_output
which are both called by PPP core only when PPP session is up, if
PPP session is UP it means the link protocol is UP as well.
L2TP can't be anything else than data phase in pppol2tp_disconnect,
this function is only called by PPP core only when PPP session is up,
if PPP session is UP it means the link protocol is UP as well.
When we are disconnecting, we should switch to PPP dead phase at the
very end, because this is our final disconnection phase allowing
reconnect, therefore we should switch to dead phase after the link
protocol finished disconnecting.
We are currently switching to dead phase when LCP detected that the link
is down, this is obviously wrong. Fix this flaw by continuing in
disconnect phase until ppp_link_end is called from link protocol.
In the BSD socket API world, IP_HDRINCL is a socket option for "raw"
sockets that indicates whether sent packets already include an IP
header. Within lwIP, "IP_HDRINCL" is redefined as a special value
that indicates to lwIP-internal functions that an IP header is already
included. While somewhat related, the two meanings are different and,
on platforms that define the IP_HDRINCL socket option, this results in
a conflict. This patch renames the lwIP one to "LWIP_IP_HDRINCL",
thus resolving the conflict.
Doxygen does not handle #ifndef foo #define foo #endif properly. It does not see the #define foo inside.
If someone has objections or a fix for it, please tell me.
Inspired by Marco Veeneman. Change signature of get_value function to return s16_t, where values <0 indicate an error. This is mapped to SNMP_ERR_GENERROR.
- support memp stats when MEMP_MEM_MALLOC==1 (bug #48442);
- hide MEMP_MEM_MALLOC in memp.c instead of messing up the header file;
- make MEMP_OVERFLOW_CHECK work when MEMP_MEM_MALLOC==1
This reverts commit d43c092f17.
We don't actually need it, init.c is including ppp_opts.h and is doing
the following:
#if !LWIP_ETHERNET && (LWIP_ARP || PPPOE_SUPPORT)
#error "LWIP_ETHERNET needs to be turned on for LWIP_ARP or PPPOE_SUPPORT"
#endif
so the LWIP_ETHERNET fixup is not necessary per se, compatibility with
previously used lwipopts.h files is broken but at least user is warned.
Ethernet support is required for PPPoE but Ethernet support is only set
by default in opt.h if ARP is enabled, which is wrong because the right
condition is ARP and/or PPPoE, unfortunately PPPOE_SUPPORT can't be used
in opt.h because it is not defined if ppp_opts.h is not included before
opt.h in user code.
Fixup the LWIP_ETHERNET configuration value in ppp_opts.h in order to
force Ethernet support if PPPoE is enabled.
Fixes: 3ad2ad2329 ("Remove reference to PPPOE_SUPPORT in opt.h - leads
to compile errors because it has no default definition (only in
ppp_opts.h)"
Fixes bug #48300 (Private mempools allocate foreign memory), bug #48354 (Portable alignment defines/include required for static allocation) and bug #47092 (Tag memory buffers like memp_memory_xxx and ram_heap with a macro so that attributes can be attached to their definitions)
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
If lwIP encounters a half-open connection (e.g. due to a restarted
application reusing the same port numbers) it will correctly send a
RST but will not resend the SYN until one retransmission timeout later
(approximately three seconds). This can increase the time taken by
lpxelinux.0 to fetch its configuration file from a few milliseconds to
around 30 seconds.
Fix by immediately retransmitting the SYN whenever a half-open
connection is detected.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: goldsimon <goldsimon@gmx.de>
Notify phase callback, enabled using the PPP_NOTIFY_PHASE config option,
let user configure a callback that is called on each PPP internal state
change. This documents how to use it.
I think that "#define SZT_F PRIuPTR" has a much better chance
of being right, making the assumption that uintptr_t is the same as
size_t.
Dirk: I think Ambroz is right.
lwip/src/core/init.c:256:32: error: "LWIP_COMPAT_MUTEX" is not defined [-Werror=undef]
#if LWIP_TCPIP_CORE_LOCKING && LWIP_COMPAT_MUTEX && !defined(LWIP_COMPAT_MUTEX_ALLOWED)
^
Setting LWIP_TCPIP_CORE_LOCKING is meaningless for NO_SYS targets,
therefore checking if LWIP_COMPAT_MUTEX is set does not make sense.
Introduced by 42dfa71f97: Make LWIP_TCPIP_CORE_LOCKING==1 the default
(and warn if LWIP_COMPAT_MUTEX==1 in that case as mutexes are required
to prevent priority inversion on tcpip_thread operations)
PPP is just the upper protocol for PPPoE and PPPoL2TP, meaning it is only
started once "E" or L2TP is established. Therefore waiting indefinitely
for LCP packets on the PPP side does not make sense at all, if the lower
level protocol is UP, PPP *MUST* comes up as well or we should restart from
the beginning.
There is two passive modes for PPPoS, passive more, for which we will
try to connect and then listen silently, and silent mode, for which we
will listen silently from the beginning.
Introduce ppp_set_passive and ppp_set_silent so the mode can be chosen
before connecting/listening.
All modules using PolarSSL embedded library are now using pppcrypt.h.
This header use to be only necessary for MSCHAP and was not built if
MSCHAP wasn't enabled, we unfortunately left the build condition.
Introduced by 3417a02b25: PPP: add a function map for hashes and ciphers
to prepare for mbed TLS support.
Setting PPP authentication most only be done when the PPP PCB is in the
dead phase (i.e. disconnected). This is safe to access the PPP PCB
members while the session is down, therefore providing a thread-safe
function of it is meaningless and it might even be misleading.
All our new ppp_set_* functions do not have their equivalent
pppapi_set_* functions and they are not going to have them. At least
we make ppp_set_auth consistent with all others ppp_set_*, so that it
doesn't look like special.
Helper function to setup MPPE (Microsoft Point to Point Encryption) for
a PPP link. Allows enabling/disabled MPPE itself, enabling/disabling
stateless support, and whether we are willing to negotiate 40-bit
and/or 128-bit encryptions.
print_string() displays characters as \\%.03o but without first
casting it from "char" to "unsigned char" so it gets sign-extended
to an int. This causes output like \37777777630 instead of \230.
(Based from pppd commit 5e8c3cb256a7e86e3572a82a75d51c6850efdbdc)
Found by coverity.
Introduced by c0e7d54e37 "Removed 2 mem_mallocs: error string can be a
global variable, include memory for sc_ac_cookie in struct pppoe_softc;
commented out unused code (sc_service_name/sc_concentrator_name)".
Fixes it by bailing out if received AC cookie is to big for us, this
can't really happen anyway.
There is absolutely no reason I did it this way in the first
place, maybe I feared that not all compilers have a proper
implementation of offsetof() ? It sounds stupid.
Ports now only need to define datatypes and format strings on compilers that do not provide these two headers. Known good: GCC, IAR. Known bad: MSVC 2010.
Unfortunately, there is no standard way to declare a pointer with
potentially unaligned accesses. The only portable way is to create
packed struct.
VJ support uses optimized accesses to IP and TCP struct to check a
whole part of them at once to speed up the (de)compressor.
This commit wrap potentially unaligned *u16_t and *u32_t accesses with
packed struct so all compilers are able to deal with them properly.
Closes: #48308
Wait for up to the specified milliseconds for a valid PPP packet from
the peer. At the end of this time, or when a valid PPP packet is
received from the peer, we commence negotiation by sending our first
LCP packet.
This is useful because PPP does not deal properly when both peers
are sending the first LCP packet in the exact same time, which causes
delays because they both wait for a reply for their own packet.
PPP auth required flag is currently hardcoded to true if PPP is
acting as a server and set to false if PPP is acting as a client.
This is probably the most wanted behavior, but since we now have the
ability to change that at runtime, allow users to do it.
It means we can now have a server which asks the client to authenticate
or vice versa. This is pretty unusual thought. What we don't support
yet is mutual authentication with a different set of user and password
per direction which is even less usual.
PPP use peer DNS setting is currently hardcoded to true if PPP is
acting as a client and set to false if PPP is actinf as a server.
This is probably the most wanted behavior, but since we now have the
ability to change that at runtime, allow users to do it.
We don't have a way to have a different default configuration if the
PPP PCB is going to be used as a client or as a server, therefore the
default configuration should be fine for both of them. Since enabling
peer DNS by default is dangerous for server mode, the default is now
not to ask for DNS servers and it should now be explicitely enabled
if needed, update the documentation accordingly.
Now that creating a PPP listener session is a bit less obvious than
before (but much versatile!), add documentation about the most common
way to setup a PPP listener.
Now that we have helpers to set those members externaly, pppos_listen
struct ppp_addrs* argument does not add any value. In addition it
was not a well chosen design choice because the user needed to keep a
copy of struct ppp_addrs when listening again for a new connection.
Mostly for PPP server support, but not limited too, we need a way to
configure static IPv4 addresses for our side (our), peer side (his),
and two DNS server addresses if peer asks for them.
DNS servers should be set in IPCP allowoptions instead of wantoptions.
In addition if server mode is enabled we need to disable usepeerdns
config flag so we are not asking DNS servers to our client.
issue 1:
sys_arch_sem_wait() is supposed to return an elapsed time in ms, what could
happen given a > 1 kHz calling rate for high throughput systems is that it
might always returns 0 ms. This is a problem for systems which compute the
elapsed time from a high precision clock source.
This is what is currently happening in the unix port in sys_arch_sem_wait():
start time -> 1000000000; // ns
-- less than a ms before an event arrive --
end time -> 1000xxxxxx; // ns
return value -> (end time - start time)/1000000 -> 0
The return value is used to reduce the next timer interval, if
sys_arch_sem_wait() always return 0 no more timers are fired anymore
issue 2:
The current timer implementation for !NO_SYS targets only count elapsed
time while -waiting- for semaphore and doesn't count at all the time
spent by the stack to process packets. For CPU bound traffic patterns no
more timers are fired anymore.
Both are serious design issues which cannot be easily fixed without reworking
everything. This patch uses the properly implemented timers for NO_SYS targets
for !NO_SYS targets and merge them both into one single timers implementation.
This function does not clear anything anymore. What it is now is an
optional way to notify PPP that link layer is started, changing the
PPP state from "dead" to "initialize". Rename it accordingly to what
the function really is.
What we really need here is to cleanup the PPP environment before
starting LCP, we don't care about the PPP state before LCP is
started. Move cleanups from ppp_clear to ppp_start to clean them
just before we need them cleaned.
What protocols init functions are meant to is to be called once to set
the default configuration before user specific configuration is set.
Until now, we reset to the default configuration just before
reconnecting, thus without allowing any time frame to let users change
it. That was fine until one user asked to be able to do that.
This change move protocols init functions calls from ppp_clear to
ppp_new, meaning user configuration is not overwritten anymore.
Our previous way of doing it was to clear everything except a small part
of the ppp_pcb structure and then populate the structure with default
values using protocols init functions.
But it means the user is currently not allowed to change the default
configuration except the few flags and values that are currently
available in the ppp_settings structure.
Instead of adding more and more fields to the ppp_settings structure,
actually making them duplicate of already existing structure members
of ppp_pcb, but unfortunately cleaned, we carefully checked that
everything is properly cleaned during protocol lowerdown/close and
replaced our giant memset to selective memset of the few ppp_pcb
members that are not properly cleaned.
ccp_init() is meant to be called once, providing default configuration
before user specific configuration is applied. In pppd user configuration
is set just after all protocol init functions are called, in lwIP we
use protocol reset functions to do that, which is more or less the same.
Therefore, be consistent and move CCP user configuration from ccp_init
to ccp_resetci.
Since allowing input validation to trip the ASSERT handler is bad,
let's just drop the packets instead if validation fails.
Signed-off-by: sg <goldsimon@gmx.de>
dhcp_discover_request_options is u8_t array, so the result is the same.
But use LWIP_ARRAYSIZE to get the number of array entries is better
because it works for all types.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Only "lwip/arch.h" is expected to include "arch/cc.h". This is the same
spirit than "lwip/opt.h" for "lwipopts.h" and "lwip/sys.h" for
"arch/sys_arch.h".
PPP users can now choose to use an external mbed TLS copy instead of using
our internal old version (but released under a BSDish license) PolarSSL copy.
In order to welcome mbed TLS, we need to ease the switch to:
- embedded PolarSSL 0.10.1-bsd copy
or - external PolarSSL
or - external mbed TLS
This change cleanup all our previously used LWIP_INCLUDED_POLARSSL_* defines,
which were not really useful after all, making them internal build triggers
only, and this change provides a new unique global flag to use an external
PolarSSL copy.
Unfortunately, all functions were renamed when PolarSSL was renamed to
mbed TLS, breaking the API. In order to continue supporting our embedded
PolarSSL copy while allowing our users to use mbed TLS, we need a function
map to deal with the API break.
This commit add a function map for all hashes and ciphers we are currently
using.
lwip/src/core/timers.c: In function ‘sys_check_timeouts’:
lwip/src/core/timers.c:328:5: error: "PBUF_POOL_FREE_OOSEQ" is not defined [-Werror=undef]
#if PBUF_POOL_FREE_OOSEQ
Fix it by declaring an empty PBUF_CHECK_FREE_OOSEQ() function if feature is
not enabled.
Work on PPP MEMPOOL re-added the previously removed ppp_init function
because we considered it useless. Re-add magic_init which was
previously in ppp_init and removed in commit 15fbfb7363, it does
not hurt doing so and might fill the gap if we failed understanding
the crypto implication about removing it.
Simon and I think it can be removed - the receive window handling get a little less precise, but that should be OK for a lightweight stack.
Receive window is now updated with the whole pbuf size (instead of only count of read bytes from socket) as soon as socket implementation gets a pbuf from netconn layer.
Work on bug #47512: MPU_COMPATIBLE may fail on empty pool (still not finished)
Simon says:
ppp_init() does not seem to be used. The only thing it does is calling
magic_init(), which is not required because it its called again later
from ppp_input().
Also, the time from startup is rather constant, so calling sys_jiffies()
from ppp_init() does not create a random number.
Sockets bound to a multicast address could not transmit multicast
packets because the pcb local address did not match the netif address
even if the outgoing netif was resolved correctly.
To correct the issue, pcbs with a multicast local address will use
the outgoing netif address as the source address in IPv4.
- The abstraction from crypto framework was not well suitable to MBEDTLS, so I decided to move everything into an own file.
- I removed several #defines and created function prototypes instead - this is more type-safe, and users don't need to reinvent the function signatures.
- Header files were splitted into a public and a private part.
- Only SNMPv3 authentication was tested, privacy not yet.
It's already done by memset(0). This was missed in commit 5794ac2340
"tcp_alloc(): remove explicit =0 already done by memset(0)", fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This way, we don't need to update ERR_IS_FATAL() every time new non-fatal error
is added. Also drop 2 empty lines so the error constants present in 2 groups,
non-fatal errors and fatal errors.
This commit optimizes the sendmsg UDP pbuf chain creation by not
allocating/freeing a netbuf per io vector and instead building a pbuf
chain directly in the sockets layer
Same as in my last commits - this avoids errors in lwIP code where ip addresses are dereferenced (e.g. for IP type checking) without handling thinking about NULL pointers.
The old approach called udp_bind() on each of the PCBs, which puts them into udp_pcbs list. The PCBs were iterated on all non-DHCP udp_inputs() with no effect.
My cleanup removes the special handling in udp.c, and uses only one DHCP UDP PCB to catch all DHCP messages from all netifs. The dhcp_recv function then checks whether ip_current_input_netif() has DHCP enabled - if not, the message is ignored. The PCB is only created/registered when one or more PCBs have DHCP enabled.
This commit adds support to the sockets and netconn layer to update the
backlog by calling listen when the netconn is already in the listen state.
When backlog is not enabled, the call returns successfully
This commit also introduces a macro for setting the backlog value that
prevents a 0 sized (invalid) backlog
Fix a bug in the socket API's ioctl for FIONREAD. If the socket's
lastdata was assigned the function returned without error but did not
update the argument pointer.
The cast type for argp was also changed to int to conform with the
other SO_RCVBUF handling.
Create special IP address type "IPADDR_TYPE_ANY" for it.
SNMP uses new feature in non-netconn mode.
TODO: Same for TCP & RAW, adapt NETCONN to use this feature
- Move local PCB matching code in a function that can be reused in SO_REUSE && SO_REUSE_RXTOALL case.
- Some checks have been written in the dual-stack version and then repeated with the ipv6-only version. Example:
IPv6 only: ip6_addr_ismulticast(ip6_current_dest_addr())
IPv4 AND IPv6: ip_addr_ismulticast(ip_current_dest_addr())
This makes a couple of simple re-arrangements in lwip_selscan() that
should improve performance in the following ways:
1) The old code linearly walked all sockets to maxfd regardless of
whether they were set in the fd set. The process involved
acquiring sys arch protect, looking up the socket, and then
checking if the socket was present in any of the fd sets. On
systems with lots of sockets and a heavy SYS_ARCH_PROTECT
infrastructure (a mutex) this can result in a lot of extra work.
Now we skip this process for any fd that is not in the input sets
2) If the socket from tryget_socket() is NULL we no longer continue
and compare the input fd sets with a zeroed out set of events
3) We no longer need to zero out our event sets because they are
only accessed when tryget_socket() is successful
lwip_selscan() is called at most once per select call and sometimes up to three times
sign_extension: Suspicious implicit sign extension: count with type unsigned short (16 bits, unsigned) is promoted in count * size to type int (32 bits, signed), then sign-extended to type unsigned long (64 bits, unsigned). If count * size is greater than 0x7FFFFFFF, the upper bits of the result will all be 1.
The usages of memp_names are under either LWIP_DEBUG in stats_init,
or under LWIP_STATS_DISPLAY in stats_display_memp.
Fix below build warning:
lwip/src/core/stats.c:53:21: error: 'memp_names' defined but not used [-Werror=unused-variable]
static const char * memp_names[] = {
^
cc1: all warnings being treated as errors
Reported-by: David Fernandez
Fixes: 2f2a75a6d9fd ("stats: Move memp_names table out of stats_init/stats_display_memp functions")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This was missed in commit aa0e41c389
("task #12178: hardware checksum capabilities can be configured per netif"),
fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
We used to modify in place the packet payload during compression but TCP
stack requires that we don't change the packet payload, therefore we now
copy the whole packet before compression.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Prepare for VJ packet copy, reorder a bit VJ compressor so all TYPE_IP
return value are within the same code block. We do that because we don't
need to copy the packet if we are not able to compress it.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
lwIP TCP stack requires that we don't change the packet payload in netif
output functions in order to resend the pbuf if we don't receive a TCP
ACK in time, therefore we copy the whole packet before compression or
encryption.
It gets tricky because we should keep track of whether we previously
copied the buffer in PPP output netif function in order to free the
previous pbuf if necessary, BUT the first pbuf passed to the netif
output function must not be freed.
The worst case is VJ compression followed by MPPE encryption, in this
case we should free the packet allocated by VJ compressor after MPPE
encryption and we should free the packet allocated by MPPE encrypter
after calling the PPP low level output function.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
long type on LP64/ILP64 systems (such as x86_64 on Linux) is 8 byte
long, this leads to wrong offsets in packets header calculation.
Fixed it by using u32_t lwIP type instead of long type.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
This macro is only used by VJ support in PPP and was always wrong since
its introduction in commit e4a6d199fe. It's almost only used to clear
the PSH TCP flag when necessary. This flag was probably less common
about a decade ago so that would be the reason why it goes unnoticed for
so long.
Fixes: e4a6d199fe "Merged from DEVEL into main tree."
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
It might be difficult to investigate the reason of dropped packets when
there is no debug notification of what is happening, thus, add error
debug messages for dropped packets due to missing transmit or receive
CCP method.
Signed-off-by: Stephan Linz <linz@li-pro.net>
[gradator@gradator.net: improved messages]
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
ppp_free() calls the low level protocol destroy function, pppol2tp_destroy()
here, which freed the l2tp pcb, followed by pppol2tp_create which also freed
the pcb.
Fixing it by reordering the L2TP init so we don't have to call ppp_free()
anymore.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
When I create a new PPP connection, I am seeing a hardfault (segfault)
coming from pbuf_free.
I traced the problem to an invalid in_head field of the pppos_pcb structure.
The field is invalid because the memory is never cleared to zero after the
pppos_pcb structure is created in pppos_create().
I was able to fix the issue by adding a memset after the memp_malloc call.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
When the port has LWIP_CHECKSUM_ON_COPY enabled and provides
a definition of LWIP_CHKSUM_COPY, the existing logic left
LWIP_CHKSUM_COPY_ALGORITHM undefined
In this case we want it to be defined to 0 since none of the copy
checksum algorithms provided are being used
This commit also introduces indentation matching LWIP_CHKSUM to
improve the readability of the code
This function was returning values from snmp_err_t but wasn't
upgraded to using the typedef after commit babce70
This resulted in compilation failure on MSVC 2013
CCP might negotiate to not compress if peers cannot agree on a
compressor, therefore if the null compressor is chosen we must pass
packets as is instead of dropping them.
Reported-by: Stephan Linz <linz@li-pro.net>
Fixes: 987f6237c4 "PPP, MPPE, drop input/output packets if we couldn't find the chosen decompressor/compressor"
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
IP6_HLEN is only defined when LWIP_IPV6, IP_HLEN is only defined when LWIP_IPV4.
This fixes build error in !LWIP_IPV4 || !LWIP_IPV6 cases.
Fixes: f2c7e9c939 ("raw: Remove unnecessary #if guard around PCB_ISIPV6() calls")
Reported-by: Erik Ekman
Signed-off-by: Axel Lin <axel.lin@ingics.com>
In case of IP_REASS_FREE_OLDEST==0, the argument clen of
ip_reass_enqueue_new_datagram() will not used and leads
the compiler to a warning.
Signed-off-by: Stephan Linz <linz@li-pro.net>
- include new SNMP header
- add missing pointer type casting
- add missing default cases
- use const for all ip address types
- distinguish between IPv4 and IPv6 address types
Signed-off-by: Stephan Linz <linz@li-pro.net>
PCB_ISIPV6() macro is well defined for all cases (LWIP_IPV4 && LWIP_IPV6,
LWIP_IPV4 only and LWIP_IPV6 only), thus remove the unnecessary #if guard
around PCB_ISIPV6() calls.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This makes the code simpler with better readability.
Also make memp_names static because it's only referenced by stats.c.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
We don't really care the order of overflow/underflow checking because if
any checking fails we got assertion.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This fixes a bug in close when LWIP_SO_SNDTIMEO is enabled, but
the option is not in use on the socket
A simple mis-typed comparison against zero would cause the close_timeout
to get set to zero if conn->send_timeout was 0
The intended check was to over-ride the default close timeout if a
send timeout had been specified via SO_SNDTIMEO
+ Minor compile fix from me
Patch makes the code a tiny bit less lightweight (add a parameter in dns_gethostbyname which is then not used in dns_gethostbyname_addrtype) but it makes the code more readable.
No port specified means to use a random port.
udp_new_port() returns a new (free) local UDP port number on success.
So in this case we don't need iterating all lists to test if the port
number is used, udp_new_port() alreay ensures the port is not used.
Move the code checking for double bind and rebind of the same pcb earlier,
as this checking is necessary in all cases.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The code for #if SO_REUSE case does not match the comment.
By default, we don't allow to bind to a port that any other udp
PCB is already bound to, unless *all* PCBs with that port have tha
REUSEADDR flag set.
Which means we want to omit checking for the same port if both pcbs
have REUSEADDR set. Fix the logic accordingly.
Fixes: d0348e0c60 ("task #6995: Implement SO_REUSEADDR (correctly)")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
No port specified means to use a random port.
tcp_new_port() returns a new (free) local TCP port number on success.
So in this case we don't need iterating all lists to test if the port
number is used, tcp_new_port() alreay ensures the port is not used.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Current code does not correctly detect port conflict if no port specified
because it checks ipcb->local_port == port before udp_new_port().
Fix it by allocating a random port earlier.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
- SNMPv2c support
- Greatly reduced RAM usage, no memory pools any more
- API cleanup
- MIB2 is separated from SNMP stack
- Support for multiple MIBs (snmp_set_mibs call) - e.g. for private MIB
- Improved MIB2 implementation (tcpConnTable etc.)
- Redesigned simple and generic API for MIB implementation
- Comfortable node types for scalar arrays and tables
- Counter64, bit and truthvalue datatype support
- Callbacks for SNMP writes
- Runs on two APIs: RAW and netconn
- Async API is gone - the stack now supports netconn API instead,
so blocking operations can be done in MIB calls.
SNMP runs in a worker thread when netconn API is used.
- Simplified thread sync support for MIBs - useful when MIBs
need to access variables shared with other threads without locking
(used in MIB2 to access lwIP stats from lwIP thread)
Currently in work:
- Traps rewrite
- MIB compiler
When LWIP_RAND is defined, calling LWIP_RAND() is not necessary if max_time <= 2
because group->timer will be set to 1 anyway.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Problem is that declaring functions as static in a public header will produce warnings in every file it is included because the static functions are not implemented.
Solution: When socket api is enabled, netconn is simply available, too
(Socket api uses netconn api internally)
tcpip_callback_with_block() can fail with ERR_MEM or ERR_VAL, and in the
error paths the code does not post the msg to the mailbox thus the
sys_sem_wait() call might wait forever. Fix it by testing return value of
tcpip_callback() and return error immediately.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
I got below build warning if LWIP_HOOK_MEMP_AVAILABLE is defined.
src/core/memp.c: In function 'memp_free_pool':
src/core/memp.c:352:16: warning: variable 'old_first' set but not used [-Wunused-but-set-variable]
struct memp *old_first;
^
src/core/memp.c: In function 'memp_free':
src/core/memp.c:413:6: warning: 'old_first' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (old_first == NULL) {
The LWIP_HOOK_MEMP_AVAILABLE() hook does not work, fix it.
Fixes: c838e1ed5b ("Implement possibility to declare private memory pools")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
LWIP_NETCONN and LWIP_SOCKET are defined in opt.h,
so move #include "lwip/opt.h" out of #if LWIP_NETCONN || LWIP_SOCKET guard.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
pbuf_alloc() for PBUF_RAM type always return big enough memory on success.
So checking p->len is not necessary. Testing if p is NULL or not is enough.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Current code already checks memp_overflow_check_all() in memp_free() if
MEMP_OVERFLOW_CHECK >= 2. So in memp_free_pool(), it should use
MEMP_OVERFLOW_CHECK == 1 instead.
Fixes: c838e1ed5b ("Implement possibility to declare private memory pools")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The h will point to NULL if h->next->next is NULL anyway.
So remove the unnecessary NULL test for h->next->next in each iteration.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
There should be no duplicate pcb in raw_pcbs/udp_pcbs list.
So the implementation of raw_remove()/udp_remove() can break from the for
loop once the target pcb is found and removed from the list.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The TCPIP_APIMSG_ACK will call NETCONN_SET_SAFE_ERR for both
LWIP_TCPIP_CORE_LOCKING and !LWIP_TCPIP_CORE_LOCKING cases.
So remove superfluous NETCONN_SET_SAFE_ERR call before TCPIP_APIMSG_ACK.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
The logic to use an already existing pcb is wrong because the idx never
advanced in the for loop, so it keep checking the same dns_pcbs[idx] for
each loop iteration. Fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This commit updates the snd_queuelen comment documentation to reflect
that snd_queuelen tracks the number of pbufs currently in the send
buffer (unsent + unacked queues) rather than the number of pbufs
available in the buffer (which was what previous comment implied)
This commit updates socket option comments to reflect which ones are
currently supported:
* SO_REUSEPORT is no longer implemented
* SO_SNDTIMEO is implemented
lwip/src/netif/ppp/mppe.c: In function `mppe_rekey':
lwip/src/netif/ppp/mppe.c:74:15: error: declaration of`sha1' shadows a global declaration [-Werror=shadow]
lwip/src/include/netif/ppp/polarssl/sha1.h:88:6: error: shadowed declaration is here [-Werror=shadow]
Older compilers don't like variables with the same name as
global functions. md5.h contains a function md5(), rename
md5 variable in magic.c to md5_ctx.
Older compilers don't like variables with the same name as
global functions. md5.h contains a function md5(), rename
md5 variable in magic.c to md5_ctx.
lwip/src/netif/ppp/magic.c: In function `magic_churnrand':
lwip/src/netif/ppp/magic.c:105:15: error: declaration of `md5' shadows a global declaration [-Werror=shadow]
lwip/src/include/netif/ppp/polarssl/md5.h:88:6: error: shadowed declaration is here [-Werror=shadow]
lwip/src/netif/ppp/magic.c: In function `magic_random_bytes':
lwip/src/netif/ppp/magic.c:165:15: error: declaration of `md5' shadows a global declaration [-Werror=shadow]
lwip/src/include/netif/ppp/polarssl/md5.h:88:6: error: shadowed declaration is here [-Werror=shadow]
Older compilers (GCC 4.6) don't like variables with the same name as
global functions:
lwip/src/netif/ppp/lcp.c: In function 'lcp_received_echo_reply':
lwip/src/netif/ppp/lcp.c:2685:11: error: declaration of 'magic' shadows a global declaration [-Werror=shadow]
lwip/src/include/netif/ppp/magic.h:101:7: error: shadowed declaration is here [-Werror=shadow]
magic.h contains a function named magic(), so rename the variable.
Remove snmp_init(), it is called by lwip_init().
Remove snmp_inc_sysuptime() and snmp_add_sysuptime(), they do not exist
anymore, MIB2 is now using sys_now().
Existing functions are based on IP address, but the address is used
only to look up which netif to act on. The netif-based core code is
extracted to new exported functions.
If you have a netif handle, this makes it easier to join/leave
groups, without the need to convert to IP address first only for the
mld6 code to convert back to netif.
Existing functions are based on IP address, but the address is used
only to look up which netif to act on. The netif-based core code is
extracted to new exported functions.
If you have a netif handle, this makes it easier to join/leave
groups, without the need to convert to IP address first only for the
IGMP code to convert back to netif.
It used to be this way because the original implementation was close to
the hardware and used a free running 16 bits timer so it was necessary.
Currently what it is only doing is removing potential entropy we might
get from upper bits, that's a bad idea.
Jiffies isn't really a humanly readable value and it means the default
PPP_MAXIDLEFLAG period depends on the platform "jiffies" frequency,
which isn't nice.
Change PPP_MAXIDLEFLAG to use ms instead of jiffies, the current
PPP_MAXIDLEFLAG default (100 ms), looks like a sane value and is
left unchanged.
gw netif field for point to point interfaces is the peer IP address.
Check if the destination is equals to the gw field of point to point
interfaces (broadcast flag is not set) when routing an IP packet.
LWIP_ERROR macro exited the function early with the return code
indicating a SUCCESS. Fix the error codes. Return the specified
error code for cases when the pbuf is too short.
This commit hooks up the TCP cachehit stat to the PCB locality feature
so that when a PCB is moved to the head of the list and a segment comes
in, we consider this a cache hit
This also matches the usage of the cachehit stat in UDP
Adds sendmsg implementation for TCP and UDP sockets. Control messages
are not supported at this point, but could be added in the future
https://savannah.nongnu.org/bugs/?44805
Change-Id: Iddb287fd4b693f7563f8c923f76785cdde782d2f
The overall lwIP design on data flows (netif,udp,tcp) is to use a user
defined callback to get data from stack and a static function to send
data to stack, which makes perfect sense. The SIO port was an exception,
the PPP stack never really used the SIO port by only using the
sio_send() function (and the ignominious sio_read_abort() function a
while back).
The way the SIO port is currently designed adds a tight coupling between
the lwIP port and the user code if the user need to do specific user
code if the current uart used is the PPPoS uart, which is not nice,
especially because all the lwIP stack is quite clean at this subject.
While we are at stabilizing the PPP API, change this behavior before
it's too late by replacing the static sio_write() calls to a user
defined callback.
Added the random seed already used without PPP_MD5_RANDM
as an entropy source when PPP_MD5_RANDM feature is enabled.
(And a little bit of code cleaning for both)
If LWIP_RAND() is available, it is used instead of libc srand()/rand()
if PPP_MD5_RANDM is disabled and it is added as a source of randomness
if PPP_MD5_RANDM is enabled.
A disabled PPP_MD5_RANDM should not be used when challenge are used, but
anyway, improved magic_randomize() so magic_randomseed is not equals to
sys_jiffies() which is pretty useless because that's fully predicable.
The only API difference with and without the PPP_MD5_RANDM support is the
availability of the random_bytes() function. Added a random_bytes()
function on top of magic() when PPP_MD5_RANDM support is not enabled,
thus allowing builds for both cases.
PPP_MD5_RANDM is still enabled by default (it was mandatory) if a protocol
using encryption is enabled, such as CHAP, EAP, or L2TP auth support.
There is no point of calling magic_randomize() for each pppos_input()
call, making magic_randomize() potentially called for each serial input
byte which is quite a bad idea since magic_randomize() is quite
intensive in processing time (MD5 computation) compared to HDLC frame
parsing. There is no entropy added when being called for each input byte
rather than for each valid input packet because byte input is a
monotonic event at the packet level. Well, if packet arrival time is a
valid entropy source even so, which I doubt a lot, but we don't really
have anything else and we really need random for PPP authentication
layers.
Drop input/output packets if we couldn't find a decompressor/compressor,
it can't really happen because we only negotiate what we are able to
compress/decompress, but for the sake of code consistency it makes much
more sense to do so.
We used to modify in place the packet payload during encryption, it works
well for UDP and ICMP but TCP stack requires that we don't change the
packet payload, therefore we now copy the whole packet before encryption.
This commit adds support to send and receive multicast on the loopback
netif by enabling IGMP via NETIF_FLAG_IGMP
This commit also introduces an LwIP configuration option,
LWIP_LOOPIF_MCAST, to control the behavior and it defaults to off
This commit address two issues with sockaddr struct implementations for
IPv6:
1) struct sockaddr_in6 should have 32-bit unsigned field sin6_scope_id
as specified in Section 3.4 of RFC 3493 (Basic Socket Interface
Extensions for IPv6)
2) struct sockaddr is not extended in IPv6 to contain space for
struct sockaddr_in6. Applications should be using struct
sockaddr_storage when needing generic storage. This removes the
extra bytes added when LWIP_IPV6 is defined
the netif_add_ip6_address function was declared err_t in
src/include/lwip/netif.h, but defined as s8_t (the default value of
err_t) in its implementation in src/core/netif.c.
this causes "conflicting types for 'netif_add_ip6_address'" errors if
err_t is defined differently in cc.h (as for example recommended in
[1]).
as it only returns error constants, it is changed to use err_t
throughout.
[1] http://lwip.wikia.com/wiki/Porting_For_Bare_Metal
Writes to offsets pointing to the start of a pbuf in the chain
did nothing and just returned ERR_OK.
Added unit tests to verify the fix, and also
that pbuf_get_at()/pbuf_put_at() handles this case.
When LWIP_HAVE_LOOPIF is enabled, a separate loopback interface is added
as a netif. A netif need to have its link state set to up to be able to be
selected as a route in ip4_route or ip6_route.
The regression appears to be when bug #43904 (ip_route() and ip6_route()
must detect linkup status) was fixed.
Furthermore, there is no point of having the loopif down by default.
This commit fixes a bug in netbuf_destport() where LWIP_NETBUF_RECVINFO is
enabled, but not LWIP_CHECKSUM_ON_COPY is enabled
The flags field is only available when LWIP_CHECKSUM_ON_COPY is enabled. In
this mode, the toport_chksum is dual functioning as storage for port and
checksum
When a client sends an ICMP echo request with ID 0, sequence 0 and
either no data or any amount of 0x00 bytes as data, the checksum in the
reply is wrong (off-by-one).
Expected checksum is 0xffff in that case, observed is 0x0000.
We used a static 4 instead of MEM_ALIGNMENT earlier, however it broke
things for MEM_ALIGNMENT 1 or 2, fixed using a LWIP_MIN(MEM_ALIGNMENT,
4) statement.
When PPP is used over a link which does not guarantee packet ordering,
we might get late MPPE packets. This is a problem because MPPE must be
kept synchronized and the current implementation does not drop them and
rekey 4095 times instead of 0, which is wrong.
In order to prevent rekeying about a whole count space times (~ 4095
times), drop packets which are not within the forward 4096/2 window and
increase sanity error counter.
Check tot_len for ZLB instead of len, it might happens we are just
between 2 pbuf, although almost impossible.
Check buffer is at least 2 byte long before checking address & flags
header.
Most of them were wrong actually. We have to use unsigned int because
C90 only allows int types for bitfields, so we are stuck to 32-bit
bitfields in most cases.
PBUF_LINK_ENCAPSULATION_HLEN support was introduced by 6ef7563f and
missed the fact that header size calculation/reservation using
computation like PBUF_LINK_HLEN + PBUF_IP_HLEN + ... are used all over
the source code. Hopefully fixed all of them.
We need to do VJ compression before CCP/MPPE compression and VJ
decompression after CCP/MPPE decompression. This leads to a massive
rewrite of how we currently handled VJ only in the PPPoS lower protocol
handler.
Moved VJ structures from pppos to ppp_pcb because we need them back in
PPP core. This is a bit unfortunate because that's not necessary for
PPPoE or PPPoL2TP, but, hey!. Fixed CCP+MPPE+VJ order.
We need to know which methods were chosen when CCP is up, this used to be done
using ccp_test() which we are in the process of removing.
Using non-existing method 0 instead of -1 in CCP for unset method, allowing
type change from s16_t to u8_t for method.
Removed mutiple copies of keys by pre-setting MPPE keys during MSCHAP
negotiation.
Improved MPPE init so we don't need to pass a buffer formatted in a
special way to MPPE, this is necessary for pppd to talk to the kernel,
we don't need that here.
MSCHAP was written the old-way, with all functions declared non static in
header, independent of their local or global scope status. Same for local
constants. Reworked in a more mordern way.
We are going to need ppp_pcb* in MSCHAP and MSCHAPv2 for MPPE for
int mppe_keys_set, u_char mppe_send_key and u_char mppe_recv_key
which are currently global variable which must be moved to ppp_pcb.
Removing a bit of redundancy and previous artefact of a generic kernel
interface. Exporting mppe_init() instead of mppe_comp_init() plus
mppe_decomp_init().
We are going to use statically allocated struct ppp_mppe_state through PPP PCB,
removed now useless mppe_alloc() and mppe_free().
Merged mppe_alloc() key copy to mppe_init().
ccp_test() is not only used to test kernel support, but also to set MPPE keys,
we will change that further, but for now, re-add the necessary ccp_test()
Our PPP stack deals with packet without address and control byte nor 2-byte
protocol field, improved mppe_compress() so we don't have to worry about
them.
Our PPP stack deals with packet without address and control byte nor 2-byte
protocol field, improved mppe_compress() so we don't have to worry about
them.
If LWIP_IPV4 is true but PPP_IPV4_SUPPORT is false, we need
a dummy ppp_netif_output_ip4() callback because we don't have
a netif_null_output_ip4() by default like we have for IPv6 with
netif_null_output_ip6().
Removed ppp_singlebuf() in pppol2tp_input(), chained pbuf are perfectly
acceptable for IP data and we are currently supporting them perfectly
for PPPoS. The PPP stack itself (LCP, IPCP et al.) does not support
chained pbuf and is already calling ppp_singlebuf() just before passing
packet to the protocol handler.
Added ppp_singlebuf() in pppol2tp_dispatch_control_packet() because we
do not support chained pbuf in L2TP control packet.
mppe_decompress() now takes a pointer to a pbuf pointer and re-use the
passed buffer for MPPE "decompression". Removed sub protocol handling
which can be shared among all decompressors in ppp.c
Removed ppp_singlebuf() in pppoe_data_input(), chained pbuf are
perfectly acceptable for IP data and we are currently supporting them
perfectly for PPPoS. The PPP stack itself (LCP, IPCP et al.) does not
support chained pbuf and is already calling ppp_singlebuf() just before
passing packet to the protocol handler.
Our PPP stack deals with packet without address and control byte nor 2-byte
protocol field, improved mppe_decompress() so we don't have to worry about
them.
In PPP, we previously know if we are dealing with a IPv4 or a IPv6 packet,
we don't need to use the ip_input() dispatch function, removing a useless
if and reducing call stack by one.
We don't need anymore an input function for ip4 and an input function
for ip6, work to achieve that was partially done by ce7e31cd.
pppol2tp_input() is now only called by pppol2tp_input_ip(), finishing
dual stack support by merging pppol2tp_input_ip() into pppol2tp_input().
Replaced ip4_addr_t to ip_addr_t in pppapi_pppol2tp_create() prototype,
now binding to UDPv6 or UDPv4 depending on the passed ip_addr_t type.
Removed pppol2tp_create_ip6() and pppapi_pppol2tp_create_ip6().
lwip/src/include/lwip/autoip.h:52:1: error: C++ style comments are not allowed in ISO C90 [-Werror]
//#include "lwip/udp.h"
lwip/src/core/ipv4/autoip.c:70:1: error: C++ style comments are not allowed in ISO C90 [-Werror]
//#include "lwip/udp.h"
lwip/src/include/lwip/api.h:239:25: error: declaration of ‘lev’ shadows a previous local [-Werror=shadow]
SYS_ARCH_DECL_PROTECT(lev); \
ip_addr_t is used for all generic IP addresses for the API, ip(4/6)_addr_t are only used internally or when initializing netifs or when calling version-related functions
We don't need "compression" stats on a encryption protocols, as commented
"Since every frame grows by MPPE_OVHD + 2 bytes, this is always going
to look bad ... and the longer the link is up the worse it will get."
This file, which is an unmodified copy of Linux MPPE encoder/decoder, is
licensed under a dual License BSD/GPL model. It was previously in the
pppd source tree and it was removed because this is merged into the Linux
kernel.
We don't need to test our available compression protocols that much, we know
what we are going to be able to use in embedded. Even PPPd don't need that.
Checking only in ccp_resetci() is enough, this way we know our cilen size
before ccp_addci() is called. PPPd is designed that *_addci() can use less
bytes than it previously asked in *_cilen(), we prefer to avoid that here.
We actually don't need at all ccp_test() calls, we know what we are
able to support at compile time, we don't need to ask the kernel like
PPPd does. This is just the first step in ccp_test() removal.
An edge case in out-of-sequence TCP packet processing did not use the
appropriate macro to check if the sender overran the recieve window.
Consequently, this case sometimes evaluated to true when it shouldn't, which
resulted in various bad behavior, including trying to resize a TCP buffer to 4
gigabytes.
Follow-up of the #44565 bug fix, renamed the misnamed
PPP_INPROC_MULTITHREADED to PPP_INPROC_IRQ_SAFE because it is
IRQ safe but not thread safe.
Updated PPP documentation which now clearly state when and how
this feature can be used.
lwip/src/netif/ppp/pppol2tp.c: In function ‘pppol2tp_udp_send’:
lwip/src/netif/ppp/pppol2tp.c:1229:3: warning: ‘err’ may be used uninitialized in this function [-Wmaybe-uninitialized]
return err;
^
Renamed pppos_drop() → pppos_input_drop()
Renamed pppos_free_current_input_packet() → pppos_input_free_current_packet()
Moved pppos_output_last() after pppos_output_append()
Moved pppos_input_free_current_packet() before pppos_input_drop()
We actually allocated a pbuf chain only to iterate later the linked list
calling sio_write() for each pbuf, improved by calling sio_write() when
buffer is full and by recycling the pbuf, therefore only using one pbuf
for PPPoS output path.
Reworked pppos_write() and pppos_netif_output() to share more common
code into pppos_output_append() and pppos_output_last().
If PPP_INPROC_MULTITHREADED is true, then user does not what to use
the TCPIP API. Disabling the TCPIP API helps the user to understand
that PPP_INPROC_MULTITHREADED must not be used if he wish to use
the TCPIP API.
!NO_SYS users may now use as well the TCPIP API for PPPoS input data,
this way they can disable PPP_INPROC_MULTITHREADED and run pppos_input()
inside the lwIP thread, which fixes, at least for them, all the
threading issues related to PPP_INPROC_MULTITHREADED.
If PPP_INPROC_MULTITHREADED is not enabled, we can free unfinished
RX pbuf from the pppos_disconnect() function because pppos_input()
is running in the same context. Thanks to the pppos->open flags we
now only need to free remaining pbuf in the disconnect function
if PPP_INPROC_MULTITHREADED is not enabled.
Don't process input data if PPPoS is closed, it helps using
pppos_input() from a different context to prevent pppos_input() to
modify PPPoS RX machine state on a closed PPPoS session. It also
prevents allocating pbuf (which are going to be tossed out by PPP core)
and parsing serial input on a closed session.
It only mitigates the fact that this function is actually NOT thread
safe in absolutely all cases, it does not fix it but it helps for a low
cost.
For example user application should never call pppos_input() while
pppos_connect() or pppos_listen() is currently running because both of
them are freeing any input pbuf left over from the last session before
resetting the PPPoS state, they really have to to prevent pbuf leaks.
We cannot fix that easily because we don't have spinlock with an
irqsave/irqrestore helper for IRQ contexts. Mutex cannot be used in
interrupt contexts (or again, with an IRQ mutex helper).
We are going to improve the documentation on this point.
Reduced static buffer to the strict necessary (26 bytes), removed
call to eui64_ntoa(), merged eui64_ntoa() into llv6_ntoa().
272 bytes (code + static buffers) to 140 bytes on x86_64.
Improved eui64_ntoa() as well, we don't need it anymore but I'd
like to keep all eui64_* helpers functions.
Set IPv6 link local invalid before clearing it. Don't wait sif6up() to set
the link local valid, netif_ip6_addr_set_state() is only an accessor function
so it does not start any discovery whatsoever.
PPPoS was actually not thread safe, pppos_input() can be called from
lwIP user port at any time, whatever the PPP state is. It might even be
called during pppos_connect() and pppos_listen(), this is quite unlikely
the port do that but nothing prevent the user to since we document
pppos_input() as being thread safe.
Added a mutex if PPP_INPROC_MULTITHREADED is set and ensure pppos_input()
is safe in regard to other pppos_* functions.
Now setting DNS addresses in sdns() using dns_setserver() instead
of keeping a local copy. This is probably the wanted PPP behavior,
we will see if users want this conditional.
This was confusing, recent lwIP changes fixed the meaning as well as
how it is used everywhere, making the administrative status a user-only
controlled flag. Now that it's clear, updated PPP to follow lwIP
core change.
Using netif_set_link_{up,down} instead of netif_set_{up,down} when PPP
reaches/leaves running state. PPP interface is now set to administratively
UP when created with link state down.
lwIP core might send packet when calling netif_set_up(), don't drop packets
anymore in ppp_netif_output_ip4() and ppp_netif_output_ip6() because flags
are cleared.
Only used for debug, reworked in a more clever way. It was actually broken
by design: setting an interface integer into a string without formatting
was quite a dumb idea.
Don't disconnect when we receive a PADT, we let the LCP Echo/Reply find
the fact that PPP session is down. Asking the PPP stack to end the
session require strict checking about the PPP phase to prevent endless
disconnection loops.
Luckily it previously does nothing because PADT frames are rarely sent
with a hunique tag and we only set the sc pointer if we receive a
hunique tag.
Makes it clear we are initiating the PPP session with ppp_connect
(i.e. acting as a PPP client) so there is no confusion possible
between ppp_connect and ppp_listen.
Prepare for PPP_SERVER support, we need to move auth configuration before
lcp_allowoptions is copied into lcp_gotoptions. Restore unused
auth_reset() function using pppd original source code.
We don't need ask_for_local boolean, this is only useful for setup which
can determine the local IP address from the system hostname, which is
probably meaningless for embedded devices (and probably any devices).
It was actually only set by ip_check_options() which is commented out in
lwIP because we don't parse a config file nor check PPP configuration
(user is responsible about writing a configuration which is logical ;-).
Furthermore ask_for_local boolean never set actually had the wrong
default for PPP server setups.
lwip/src/core/netif.c: In function ‘netif_set_ipaddr’:
lwip/src/core/netif.c:403:5: warning: implicit declaration of function ‘udp_netif_ipv4_addr_changed’ [-Wimplicit-function-declaration]
udp_netif_ipv4_addr_changed(&netif->ip_addr, ipaddr);
^
PPP is now pointerful for a while, we don't need anymore accessor functions
for the unique PPP local and static control block. Replaced
ppp_set_netif_statuscallback() and ppp_set_netif_linkcallback() functions to
defines.
Removed pppapi_do_ppp_set_netif_statuscallback() and
pppapi_do_ppp_set_netif_linkcallback(), they were useless because
netif_set_status_callback() and netif_set_link_callback() can be
safely called while PPP status is in dead (= non open) state
and even before the PPP session is actually created at all.
this changes the callback signatures of the ip_output and the
{udp,raw}_recv functions.
changes were made by going through all header files, searching for
occurrences of ip_addr_t, qualifying them as const and if required
modifying the corresponding c files, looking for other uses of ip_addr_t
that would be required.
the following header files were not treated as i'm not using them and
wouldn't see them compiled: api.h api_msg.h dhcp.h dns.h igmp.h
netifapi.h pppapi.h snmp.h snmp_msg.h snmp_structs.h ppp.h pppol2tp.h
test/*
no modifications were done on ip6_addr_t.
pppos_create() can be called whether the modem is ready to process the
PPP session since pppos_create() does not start the PPP session anymore,
moved the advise from pppos_create() to ppp_open().
ppp_sighup() hard change the PPP FSM phase, it ends up with a FSM
mismatch if PPP is currently connecting or disconnecting.
Only do "sighup" on the stable running phase, fallback to the close
method. Handle special DEAD and HOLDOFF states as well.
We can have an IPv6 only PPP interface, checking if6_up instead of if_up fixes
IPv6 only setup.
ppp_netif_output() which were only used for common code between
ppp_netif_output_ip4() and ppp_netif_output_ip6() is not necessary
anymore, removed, reducing call stack by one.
This is now totally useless, it was used for the PPP core code but it is not
used anymore, remove then the user ability to set the PPP error code through
PPPCTLS_ERRCODE.
Removed useless calls to ppp_ioctl(pcb, PPPCTLS_ERRCODE, …), we now assign
pcb->err_code directly instead. ppp_ioctl() is not linked anymore if user
application don't use it.
lwip/src/netif/ppp/polarssl/md4.c:43:20: warning: "LWIP_INCLUDED_POLARSSL_MD4" is not defined [-Wundef]
lwip/src/netif/ppp/polarssl/sha1.c:42:20: warning: "LWIP_INCLUDED_POLARSSL_SHA1" is not defined [-Wundef]
lwip/src/netif/ppp/polarssl/des.c:43:20: warning: "LWIP_INCLUDED_POLARSSL_DES" is not defined [-Wundef]
Added macro PPP_AUTH_SUPPORT, if none of auth protocols are enabled
(PAP, CHAP, EAP) we reduce PPP memory usage by compiling out all
struct fields and source code used for authentication.
VJ is only supported for PPPoS, RFCs does not say VJ is forbidden on
PPPoE or PPPoL2TP (looks like it is strongly discouraged though, due
to checksum issues when using VJ).
We only need to keep track of existing PPPoS interfaces if PPPoS
is not the only enabled protocol.
PPP CORE does not have callbacks pointers for all PPPoS callbacks
which should actually be required for PPPoS (VJ config, asyncmap, ...),
there is too much callbacks to create and PPPoS must be kept light,
especially for users who are only using PPPoS.
But there is a drawback, PPP CORE does not know which
lower protocols it is talking to thanks to the abstraction,
therefore if PPPoS is enabled as well as PPPoE or PPPoL2TP there
might be situation where PPP CORE calls pppos_ config functions
on interfaces which are NOT PPPoS one. This is very unlikely to
happen because protocols not supported by PPPoE or PPPoL2TP are
disabled at LCP/IPCP negotiation but we are better safe than sorry.
So we check if passed PPP pointer to PPPoS configuration functions
is a PPPoS interface by checking against a linked list of existing
PPPoS interfaces.
lwip/src/netif/ppp/ppp.c: In function ‘ppp_input’:
lwip/src/netif/ppp/ppp.c:769:5: warning: ISO C90 forbids mixed declarations and code [-Wpedantic]
const char *pname = protocol_name(protocol);
^
Reordered functions in the order they are declared in headers.
Removed useless ppp_link_down() function.
Merged ppp_stop() and ppp_close().
Merged ppp_hup() and ppp_sighup().
xmit_accm was meant to be a user configurable asyncmap, it was actually
broken since the introduction of ppp_new by the way we now reset the PPP
initial state, looks like no one until now is needing it anymore. If
necessary we will reintroduce this feature later properly instead of a
dirty and ugly hack into the PPP code.
We don't have callbacks which can be set or cleared for PPPoS
configuration, there is too much callbacks to create and PPPoS must be
kept light, therefore PPPoS functions can be called when PPP core
configure a PPPoE or PPPoL2TP interface, this is very unlikely to
happens because protocols not supported by PPPoE or PPPoL2TP are
disabled at LCP/IPCP negotiation but being safe is still better.
Check if passed PPP pointer to PPPoS configuration functions is a PPPoS
interface by using a linked list of exiting PPPoS interfaces.
Moved ppp_write_over_ethernet() and ppp_netif_output_over_ethernet() to pppoe.c
Moved ppp_write_over_l2tp() and ppp_netif_output_over_l2tp() to pppol2tp.c
Re-order ppp.[ch] functions in the order functions should be called from
user application. Moved create functions, which actually return a PPP
control block before functions needing a PPP control block.
Added necessary PPP core functions for PPPoE and PPPoL2TP status
notificaton (ppp_link_failed and ppp_link_end), removed callback,
low level protocol are now calling PPP core "link" functions.
First step of a rework of how low level protocols are using the
PPP core. Low level protocols are now going to use the core instead
of core using the low level protocols.
Final goal: separate PPP core code from low level protocols.
Re-order ppp.[ch] functions in the order functions should be called from
user application. Moved create functions, which actually return a PPP
control block before functions needing a PPP control block.
The only benefit of ppp_delete() call was about having a persistent
netif interface. netif was moved out of PPP pcb so we don't need
ppp_delete() anymore, second step in simplifying the weird
new/open/free/delete PPP API.
The only benefit of ppp_new() call was about having a persistent netif
interface. netif was moved out of PPP pcb so we don't need ppp_new()
anymore, first step in simplifying the weird new/open/free/delete PPP
API.
Users might want to share a netif control block between an Ethernet
interface and a PPPoS interface (I want actually) in case PPP is just
used as redundancy if Ethernet is down (eg. PPPoS GPRS fail over).
Moved netif out of PPP control block in a similar way it is currently
done for Ethernet interfaces. Furthermore, this is a first step on
removing the "new/create/free/delete" API which is awful but currently
necessary to handle fail over from PPPoX to another PPPoX (eg. from PPoE
on xDSL to PPPoS on GPRS fail over) without free()ing the netif which
might be used on udp_sendto() or L2TP VPN links.
when custom lwipopts.h files are used (MEMP_USE_CUSTOM_POOLS), there is
typically the need to use sizeof(some_struct) in there, but on structs
that are not already declared in lwip; thus, they use #include on custom
headers.
even if the included files have proper include guards, the way memp
headers are used (
typedef enum {
#define LWIP_MEMPOOL(name,num,size,desc) MEMP_##name,
#include "lwip/memp_std.h"
MEMP_MAX
} memp_t;
) breaks when fresh includes are involved. in this patch, this gets
circumvented by including lwip/memp_std.h once with an empty
LWIP_MEMPOOL definition, so that all the includes from custom
lwippools.h files can be handled safely.
The current code is buggy regarding handling of link state when using
both IPCP and IPv6CP: if IPv6CP has been set up and if during IPCP
negociation, ipcp_up() fails, it will incorrectly take the interface
down. The simple solution here is to change the platform code to do the
same as on Solaris: separate IPv6CP up/down state handling with sif6up()
and sif6down(), so that we really know when the interface is allowed to
go down.
(Based from pppd commit b04d2dc6df5c6b5650fea44250d58757ee3dac4a)
The style u_int32_t is not used anywhere else in the project, and is not
supported by the C standard, now using lwIP u32_t type. It was introduced
in 25e398a.
Based from pppd 2.4.5, released 2009-11-17, with huge changes to match
code size and memory requirements for embedded devices, including:
- Gluing together the previous low-level PPP code in lwIP to pppd 2.4.5, which
is more or less what pppd sys-* files are, so that we get something working
using the unix port.
- Merged some patchs from lwIP Git repository which add interesting features
or fix bugs.
- Merged some patchs from Debian pppd package which add interesting features
or fix bugs.
- Ported PPP timeout handling to the lwIP timers system
- Disabled all the PPP code using filesystem access, replaced in necessary cases
to configuration variables.
- Disabled all the PPP code forking processes.
- Removed IPX support, lwIP does not support IPX.
- Ported and improved random module from the previous PPP port.
- Removed samba TDB (file-driven database) usage, because it needs a filesystem.
- MS-CHAP required a DES implementation, we added the latest PolarSSL DES
implementation which is under a BSD-ish license.
- Also switched to PolarSSL MD4,MD5,SHA1 implementations, which are meant to be
used in embedded devices with reduced memory footprint.
- Removed PPP configuration file parsing support.
- Added macro definition EAP_SUPPORT to make EAP support optional.
- Added macro definition CHAP_SUPPORT to make CHAP support optional.
- Added macro definition MSCHAP_SUPPORT to make MSCHAP support optional.
- Added macro definition PAP_SUPPORT to make PAP support optional.
- Cleared all Linux syscall calls.
- Disabled demand support using a macro, so that it can be ported later.
- Disabled ECP support using a macro, so that it can be ported later.
- Disabled CCP support using a macro, so that it can be ported later.
- Disabled CBCP support using a macro, so that it can be ported later.
- Disabled LQR support using a macro, so that it can be ported later.
- Print packet debug feature optional, through PRINTPKT_SUPPORT
- Removed POSIX signal usage.
- Fully ported PPPoS code from the previous port.
- Fully ported PPPoE code from the previous port.
- Fully ported VJ compression protocol code from the previous port.
- Removed all malloc()/free() use from PPP, replaced by stack usage or PBUF.
- Disabled PPP server support using a macro, so that it can be ported later.
- Switched all PPP debug to lwIP debug system.
- Created PPP Control Block (PPP PCB), removed PPP unit integer everywhere,
removed all global variables everywhere, did everything necessary for
the PPP stack to support more than one PPP session (pppd only support
one session per process).
- Removed the statically allocated output buffer, now using PBUF.
- Improved structure size of all PPP modules, deep analyze of code to reduce
variables size to the bare minimum. Switched all boolean type (char type in
most architecture) to compiler generated bitfields.
- Added PPP IPv6 support, glued lwIP IPv6 support to PPP.
- Now using a persistent netif interface which can then be used in lwIP
functions requiring a netif.
- Now initializing PPP in lwip_init() function.
- Reworked completely the PPP state machine, so that we don't end up in
anymore in inconsistent state, especially with PPPoE.
- Improved the way we handle PPP reconnection after disconnect, cleaning
everything required so that we start the PPP connection again from a
clean state.
- Added PPP holdoff support, allow the lwIP user to wait a little bit before
reconnecting, prevents connection flood, especially when using PPPoL2TP.
- Added PPPoL2TP LAC support (a.k.a. UDP tunnels), adding a VPN client
feature to lwIP, L2TP being a widely used tunnel protocol.
- Switched all used PPP types to lwIP types (u8t, u16t, u32t, ...)
- Added PPP API "sequential" thread-safe API, based from NETIFAPI.
pppd: Accept IPCP ConfAck packets containing MS-WINS options
Since last week I'm seeing IPCP negotiations going like this (and
eventually failing) when connecting to my ISP:
Jul 11 20:03:25 * pppd[4833]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1
0.0.0.0> <ms-dns2 0.0.0.0>]
Jul 11 20:03:26 * pppd[4833]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1
0.0.0.0> <ms-dns2 0.0.0.0>]
Jul 11 20:03:26 * pppd[4833]: rcvd [IPCP ConfNak id=0x2 <addr 10.167.246.198>
<ms-dns1 213.162.69.1> <ms-dns2 213.162.69.169> <ms-wins 124.6.168.55> <ms-wins
17.17.17.17>]
Jul 11 20:03:26 * pppd[4833]: sent [IPCP ConfReq id=0x3 <addr 10.167.246.198>
<ms-dns1 213.162.69.1> <ms-dns2 213.162.69.169> <ms-wins 124.6.168.55> <ms-wins
17.17.17.17>]
Jul 11 20:03:26 * pppd[4833]: rcvd [IPCP ConfAck id=0x3 <addr 10.167.246.198>
<ms-dns1 213.162.69.1> <ms-dns2 213.162.69.169> <ms-wins 124.6.168.55> <ms-wins
17.17.17.17>]
Jul 11 20:03:27 * pppd[4833]: sent [IPCP ConfReq id=0x3 <addr 10.167.246.198>
<ms-dns1 213.162.69.1> <ms-dns2 213.162.69.169> <ms-wins 124.6.168.55> <ms-wins
17.17.17.17>]
...
with the last two lines repeating until the IPCP error limit is
reached. As you can see, the peer added two extra fields in the
ConfNak reply. This is allowed, and indeed the following sent
ConfReq packet reflects this. However, when the ConfAck packet
is received, pppd discards it as invalid, because of the ms-wins
fields.
This fixes it.
pppd: Take out unused %r conversion completely
This just removes some code surrounded by #if 0/#endif, which Fedora
apparently feels the need to patch...
This patch adds support for RFC3542-style checksum computation on raw,
IPv6 sockets via the IPV6_CHECKSUM socket option.
This allows the development of application-layer utilities such as
ping6 which are unable to compute the raw packet checksum without a
prior knowledge of the source address selection.
The LWIP_MALLOC_MEMPOOL macro needs to use the aligned size of the
memp_malloc_helper structure, since mem_alloc() uses it to calculate
the required pool element size. If LWIP_MEM_ALIGN_SIZE(x) is redefined
to align to something larger than 4, then in some cases
the current code can lead to unexpected mem_alloc() failures.
For example:
#define LWIP_MEM_ALIGN_SIZE(size) (((size) + 31) & ~31)
and the largest MALLOC pool is of size 60 bytes, e.g.:
#define LWIP_MALLOC_MEMPOOL(256, 60)
then the following call:
mem_malloc(58)
will cause an assertion.
Using the pbuf_clen() function to calculate the number of pbufs
for the first packet in the queue is not correct here, as pbuf_clen()
will return the total number of pbufs in the loopback I/F queue.
although timeouts are relative to timeouts_last_time (transitively by
addition to the time values of their predecessors, if there are any),
sys_timeout does not compensate for that; as a result, timeouts fire too
early unless invoked from within a timeout handler (when
timeouts_last_time == now).
- CHANGELOG should contain worthy entries only, a complete log of all source code changes can be found in git (I'm not saying this has always been observed, but I'd like to keep the list of changes as short as possible for anyone to read if interested)
PPP notify phase support, using compile-time PPP_NOTIFY_PHASE macro.
This can be used for example to set a LED pattern depending on the
current phase of the PPP session.
Callback example:
static void ppp_notify_phase_cb(ppp_pcb *pcb, u8_t phase, void *ctx) {
switch(phase) {
case PPP_PHASE_DEAD: /* Kept off */
case PPP_PHASE_MASTER:
/* LED Off */
break;
case PPP_PHASE_INITIALIZE: /* Session opened */
/* LED FastBlink */
break;
case PPP_PHASE_RUNNING: /* Session running */
/* LED On */
break;
default:
/* LED SlowBlink */
}
}
Removed one unecessary allocated PBUF per PPPoS RX packet if PPP_INPROC_MULTITHREADED is set by adding the necessary data for
pppos_input_callback() in front of the first pbuf instead of allocating a new buffer.
pbuf_type PPP is using for LCP, PAP, CHAP, EAP, IPCP and IP6CP packets.
Memory allocated must be single buffered for PPP to works, it requires pbuf
that are not going to be chained when allocated. This requires setting
PBUF_POOL_BUFSIZE to at least 512 bytes, which is quite huge for small systems.
Setting PPP_USE_PBUF_RAM to 1 makes PPP use memory from heap where continuous
buffers are required, allowing you to use a smaller PBUF_POOL_BUFSIZE.
I consider to remove the PPP_INPROC_OWNTHREAD crap in ppp-new,
as said in bugs #37278 and #37353.
1. It requires the ppp_input_thread() function to be modified to match
user system, like some did by adding the vTaskDelete(NULL); FreeRTOS
call at the end of the function, for example.
This is a tiny-tiny fonction that should be, in my opinion, on the user
port, like the Ethernet input thread we see in many Ethernet port.
2. It is actually not that thread safe.
2.1. pcb->phase IS modified by the lwIP core thread so it should at
least be set to volatile, otherwise the pcb->phase copy may live
indefinitely in CPU register. It works because of the sio_read()
function call which without doubt flush pcb->phase copy from CPU
register. I dont want to set ppp_pcb struct to volatile for obvious
performance reasons.
2.2. This function assume PCB still exists whatever is happening, which
is not the case after you called ppp_delete() function outside of this
thread. If sio_read() is blocking waiting data and pcb destroyed, it is
going to read a deallocated pcb which luckily should still have
pcb->phase set to 0 (=PHASE_DEAD) due to preallocated "control block"
structures of lwIP. Even with sio_read_abort(), there might be timings
issue due to a lack of a synchronization mechanism.
3. I dislike the sys_msleep(1), it means that systems should have at
least a 11 chr buffer at 115200/10 byte/s, and bigger with higher serial
speed, for example with 3G/HSDPA modems accessed through SPI, at 20
Mbits/s this is a ~2000 bytes buffer required to keep incoming data
during this sleep, I don't see why we require systems to do so,
sio_read() should obviously be a blocking call. I cannot easily
remove this sleep because some systems might have wrongfully used this
call as a CPU idle feature with a non blocking sio_read() call.
Free the control block, clean everything except the PPP PCB itself
and the netif, it allows you to change the underlying PPP protocol
(eg. from PPPoE to PPPoS to switch from DSL to GPRS) without losing
your PPP and netif handlers.
Created new ppp_over_X_create() functions which only prepare the PPP session without starting it
Removed ppp_reopen() and all of its sub ppp_over_X_reopen()
Removed PPPoL2TP reconnect() function, merged to connect()
Added ppp_open() able to start or restart any session
LCP is stealing a bit from fsm->flags struct member for LCP delayed up feature.
Bit stealed used to be the 9th bit (0x100) but fsm->flags was reduced to u8_t to save memory,
we are now stealing the 8th bit (0x80).
these are the compiler warnings I get with the head of ppp-new. All
of them are trivial, [...] (I'm using IAR EWARM 6.4).
ppp.c
Warning[Pe550]: variable "c" was set but never used
lwip\src\netif\ppp\ppp.c 1012
Warning[Pe111]: statement is unreachable
lwip\src\netif\ppp\ppp.c 1132
Warning[Pe111]: statement is unreachable
lwip\src\netif\ppp\ppp.c 1377
Warning[Pe111]: statement is unreachable
lwip\src\netif\ppp\ppp.c 1412
utils.c
Warning[Pe186]: pointless comparison of unsigned integer with zero
lwip\src\netif\ppp\utils.c 210
The word "class" is reserved in IAR's EWARM compiler since it looks like c++.
This causes a failure to compile in the lcp code.
Arguably it is a bug in the compiler, but it is easy to work around with a
name change in the lcp.[ch] code. I fixed it by changing "class" to "class_".
PPP stack does not handle chained pbuf, but PPP negociation packets
are at most ~40 bytes long, so we are only checking if the payload
can fit into the allocated pbuf (p->tot_len == p->len).
The lwIP PPP support is based from pppd 2.4.5 (http://ppp.samba.org) with
huge changes to match code size and memory requirements for embedded devices.
Anyway, pppd has a mature codebase for years and the average commit count
is getting low on their Git repositories, meaning that we can follow what
is happening on their side and merge what is relevant for lwIP.
So, here is the pppd follow up, so that we don't get away too far from pppd.
The only way PPPoE or PPPoL2TP disconnect it through ppp_link_terminated(),
therefore PPP is always already down, so we don't need to ask PPP to hup or stop.
This is now the user choice to re-establish the session in the link status callback
by either calling the ppp_reopen() to re-establish or ppp_delete() to free the PPP
control block. Without user intervention, the PPP control block now stay in the dead
phase, allowing the user to re-establish or delete the control block later.
Option PPP_FCS_TABLE is created which controls if PPPoS FCS calculation
should be done against precalculated table or by using a short algorithm.
Default value is 1, keeps old behaviour.
Setting it to 0 saves around 0.5 kB flash.
Disabled Unix-centric non necessary include files
Changed some include paths
Removed all printf() I put there and there for debugging.
It builds with the avr32 gcc toolchain, meaning we removed
all the pppd code requiring a unix base.
However, as of now, the notify() function is empty, so it requires
some work if someone want to use it.
The notify feature allows someone to be able to follow the
state of the PPP stack (auth ok, ipcp up, initialise, ...), this
is like the callback feature set by pppOverEthernetOpen() and others,
but with more details.
Obviously, it requires some wiring to know if there is new activity
on a not-yet established PPP interface with the default route
already set.
I don't think any lwIP user will ever need that, all should know
when to bring the link up and down.
Removed all the used Linux ioctl(), sys_linux.c is entirely disabled.
Replaced unecessary functions to set up a PPP link to null fonctions,
however all stuff necessary to shutdown a PPP link should be done.
Some utils functions related to I/O files are disabled too.
ECP and CCP support only set PPP attributes into the PPP kernel support,
they are now compile-time options and are disabled by default and
obviously not supported (yet? :p)
OpenBSD DES require more than 70 kB of static memory.
The GNU libcrypt DES, for information, require more than 131 kB,
so this is probably the case with all non memory optimised DES.
PolarSSL only required 132 bytes of stack with some kB of .rodata
precomputed tables :-)
I personally don't need MS CHAP v1 or MS CHAP v2, and that was not
supported in the previous PPP port, so there is no regression,
I feel comfortable about removing those hard to port stuff.
If someone want to do the MS CHAP port, he first have to find or
do a small memory footprint DES implementation.
Using cleaned PolarSSL md4/md5/sha1 implementations, without changing the API,
so that lwIP users already doing SSL or using PolarSSL don't need to compile
md4/md5/sha1 twice.
Added to that, we need a DES library for MSCHAP, and PolarSSL provided
a DES support.
And finally, PolarSSL is outstanding :-)
About multilink support.
Multilink uses Samba TDB (Trivial Database Library), which
we cannot port, for the above reason.
We have to choose between doing a memory-shared TDB-clone,
or dropping multilink support at all.
http://ppp.samba.org/cgi-bin/ppp-bugs/incoming?id=2211
Using rp-pppoe pppd exits with exitcode 0, whenever there is no modem connected
and pppd get's a timeout while waiting for a PADO.
This happens because status is set to EXIT_OK in main.c at the beginning of the
procedures. Within start_link(), connect() will be called as one of the first
calls.
If that call fails (no pppoe discovery for example), jumps to "fail", which
returns without setting the status variable to failure. So at the end pppd exits
with EXIT_OK.
I moved the status = EXIT_NEGOTIATION_FAILED which will be set later within
start_link, at the top of it. That seems to work out, patch is attached:
PPPoE works, PPPoS code is not ported at all.
I am using the RP-PPPoE server to do my tests using the following
configuration:
$ cat /etc/ppp/pppoe-server-options
debug
login
lcp-echo-interval 10
lcp-echo-failure 10
ms-dns 192.168.4.130
ms-dns 192.168.4.231
netmask 255.255.255.0
defaultroute
noipdefault
usepeerdns
$ cat /etc/ppp/allip
192.168.4.1-200
$ pppoe-server -C isp -L 192.168.4.254 -p /etc/ppp/allip -I tap0
Plus the usual auth-lines in /etc/ppp/pap-secrets and
/etc/ppp/chap-secrets .
And the unix port minimal "echo" project slightly modified to use
the "tcpip" API, so with threads, which I am going to commit with
NO_SYS as a -Dmacro.
It still use some of the linux'ism, such as syslog() and crypt(),
I do not want to drop the syslog() supports at the moment, this is
pretty useful to debug, and we may just convert the way the syslog() is
done to provide a trace feature to our PPP users, as a compile-time
option.
# Use only 'java' to analyze code written in Java, Kotlin or both
# Use only 'javascript' to analyze code written in JavaScript, TypeScript or both
# Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
steps:
- name:Checkout repository
uses:actions/checkout@v4
with:
submodules:recursive
# Initializes the CodeQL tools for scanning.
- name:Initialize CodeQL
uses:github/codeql-action/init@v3
with:
languages:${{ matrix.language }}
# If you wish to specify custom queries, you can do so here or in a config file.
# By default, queries listed here will override any specified in a config file.
# Prefix the list here with "+" to use these queries and those in the config file.
# For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
# queries: security-extended,security-and-quality
queries:security-and-quality
# Autobuild attempts to build any compiled languages (C/C++, C#, Go, Java, or Swift).
# If this step fails, then you should remove it and run the build manually (see below)
#- name: Autobuild
# uses: github/codeql-action/autobuild@v3
# ℹ️ Command-line programs to run using the OS shell.
# 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
# If the Autobuild fails above, remove it and uncomment the following three lines.
# modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
- run:|
./.github/workflows/codeql-buildscript.sh
- name:Perform CodeQL Analysis
uses:github/codeql-action/analyze@v3
with:
category:"/language:${{matrix.language}}"
upload:false
id:step1
# Filter out rules with low severity or high false positve rate
lwIP is a small independent implementation of the TCP/IP protocol suite targeted at embedded systems.
The focus of the lwIP TCP/IP implementation is to reduce resource usage while still having a full scale TCP. This makes lwIP suitable for use in embedded systems with tens of kilobytes of free RAM and room for around 40 kilobytes of code ROM.
Main features include:
- Protocols: IP, IPv6, ICMP, ND, MLD, UDP, TCP, IGMP, ARP, PPPoS, PPPoE, 6LowPAN (via IEEE 802.15.4, BLE or ZEP; since v2.1.0)
Console.WriteLine(String.Format(" {0} <source MIB file> <dest C file> [<search path 1 for referred MIB's> <search path 2 for referred MIB's> ...]",appName));
Console.WriteLine("");
Console.WriteLine(" <source MIB file>");
Console.WriteLine(" Path and filename of MIB file to convert.");
Console.WriteLine("");
Console.WriteLine(" <dest C file>");
Console.WriteLine(" Destination path and file. If a path is passed only, filename is auto");
Console.WriteLine(" generated from MIB file name.");
Console.WriteLine("");
Console.WriteLine(" <search path X for referred MIB's>");
Console.WriteLine(" It's important to provide all referred MIB's in order to correctly ");
localValueVarUsed=true;// do not generate UNUSED_ARG code
}
if(this.FixedValueLength==null)
{
// check that value with variable length fits into buffer
container.AddElement(newComment(String.Format("TODO: take care that value with variable length fits into buffer: ({0} <= SNMP_MAX_VALUE_SIZE)",retLenVarName),singleLine:true));
container.AddElement(newComment(String.Format("TODO: test new value here:\nif (*{0} == ) {1} = {2};",localValueVarName,retErrVarName,LwipDefs.Def_ErrorCode_Ok)));
container.AddElement(newComment(String.Format("TODO: put requested value to '*{0}' here. '{0}' has to be interpreted as {1}[]",localValueVarName,LwipDefs.Vt_U32),singleLine:true));
container.AddElement(EmptyLine.SingleLine);
container.AddCode(String.Format("{0} = 0; // TODO: return real value length here (should be 'numOfElements * sizeof({1})')",retLenVarName,LwipDefs.Vt_U32));
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