235 lines
7.4 KiB
C
235 lines
7.4 KiB
C
/* ip.h - internet protocol header file */
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/* Copyright 1984-1996 Wind River Systems, Inc. */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip.h 8.2 (Berkeley) 6/1/94
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*/
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/*
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modification history
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--------------------
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02o,31aug00,rae added Router Alert Option (IPOPT_RA)
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02n,15jul97,spm made IP checksum calculation configurable (SPR #7836)
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02m,24feb97,bjl moved struct ipt_ta declatation outside of union
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ipt_timestamp to make struct ipt_ta globally visible for c++
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01b,11apr97,rjc added min cost tos.
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01a,03mar96,vin created from BSD4.4 stuff,integrated with 02l.
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Corrected bitfields according to the ansi spec.
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*/
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#ifndef __INCiph
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#define __INCiph
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "vxWorks.h"
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/* Definitions for selecting IP checksum calculations (also see netLib.h). */
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#define IP_CKSUM_SEND_MASK 0x1
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#define IP_CKSUM_RECV_MASK 0x2
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#ifndef _BYTE_ORDER
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/*
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* Definitions for byte order,
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* according to byte significance from low address to high.
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*/
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#define _LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */
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#define _BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
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#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
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#ifdef vax
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#define _BYTE_ORDER _LITTLE_ENDIAN
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#else
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#define _BYTE_ORDER _BIG_ENDIAN /* mc68000, tahoe, most others */
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#endif
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#endif /* _BYTE_ORDER */
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/*
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* Definitions for internet protocol version 4.
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* Per RFC 791, September 1981.
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*/
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#define IPVERSION 4
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#if ((CPU_FAMILY==I960) && (defined __GNUC__))
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#pragma align 1 /* tell gcc960 not to optimize alignments */
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#endif /* CPU_FAMILY==I960 */
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/*
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* Structure of an internet header, naked of options.
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*
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* We declare ip_len and ip_off to be short, rather than u_short
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* pragmatically since otherwise unsigned comparisons can result
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* against negative integers quite easily, and fail in subtle ways.
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*/
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struct ip {
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#if _BYTE_ORDER == _LITTLE_ENDIAN
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u_int ip_hl:4, /* header length */
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ip_v:4, /* version */
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#endif
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#if _BYTE_ORDER == _BIG_ENDIAN
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u_int ip_v:4, /* version */
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ip_hl:4, /* header length */
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#endif
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ip_tos:8, /* type of service */
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ip_len:16; /* total length */
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u_short ip_id; /* identification */
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short ip_off; /* fragment offset field */
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#define IP_DF 0x4000 /* dont fragment flag */
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#define IP_MF 0x2000 /* more fragments flag */
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#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
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u_char ip_ttl; /* time to live */
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u_char ip_p; /* protocol */
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u_short ip_sum; /* checksum */
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struct in_addr ip_src,ip_dst; /* source and dest address */
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};
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#define IP_MAXPACKET 65535 /* maximum packet size */
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/*
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* Definitions for IP type of service (ip_tos)
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*/
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#define IPTOS_LOWDELAY 0x10
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#define IPTOS_THROUGHPUT 0x08
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#define IPTOS_RELIABILITY 0x04
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#define IPTOS_MINCOST 0x02
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/*
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* Definitions for IP precedence (also in ip_tos) (hopefully unused)
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*/
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#define IPTOS_PREC_NETCONTROL 0xe0
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#define IPTOS_PREC_INTERNETCONTROL 0xc0
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#define IPTOS_PREC_CRITIC_ECP 0xa0
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#define IPTOS_PREC_FLASHOVERRIDE 0x80
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#define IPTOS_PREC_FLASH 0x60
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#define IPTOS_PREC_IMMEDIATE 0x40
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#define IPTOS_PREC_PRIORITY 0x20
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#define IPTOS_PREC_ROUTINE 0x00
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/*
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* Definitions for options.
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*/
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#define IPOPT_COPIED(o) ((o)&0x80)
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#define IPOPT_CLASS(o) ((o)&0x60)
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#define IPOPT_NUMBER(o) ((o)&0x1f)
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#define IPOPT_CONTROL 0x00
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#define IPOPT_RESERVED1 0x20
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#define IPOPT_DEBMEAS 0x40
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#define IPOPT_RESERVED2 0x60
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#define IPOPT_EOL 0 /* end of option list */
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#define IPOPT_NOP 1 /* no operation */
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#define IPOPT_RR 7 /* record packet route */
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#define IPOPT_TS 68 /* timestamp */
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#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
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#define IPOPT_LSRR 131 /* loose source route */
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#define IPOPT_SATID 136 /* satnet id */
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#define IPOPT_SSRR 137 /* strict source route */
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#define IPOPT_RA 148 /* router alert */
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/*
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* Offsets to fields in options other than EOL and NOP.
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*/
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#define IPOPT_OPTVAL 0 /* option ID */
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#define IPOPT_OLEN 1 /* option length */
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#define IPOPT_OFFSET 2 /* offset within option */
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#define IPOPT_MINOFF 4 /* min value of above */
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struct ipt_ta {
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struct in_addr ipt_addr;
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u_long ipt_time;
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};
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/*
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* Time stamp option structure.
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*/
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struct ip_timestamp {
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u_int ipt_code:8, /* IPOPT_TS */
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ipt_len:8, /* size of structure (variable) */
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ipt_ptr:8, /* index of current entry */
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#if _BYTE_ORDER == _LITTLE_ENDIAN
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ipt_flg:4, /* flags, see below */
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ipt_oflw:4; /* overflow counter */
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#endif
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#if _BYTE_ORDER == _BIG_ENDIAN
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ipt_oflw:4, /* overflow counter */
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ipt_flg:4; /* flags, see below */
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#endif
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union ipt_timestamp {
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u_long ipt_time[1];
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struct ipt_ta ipt_ta[1];
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} ipt_timestamp;
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};
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#if ((CPU_FAMILY==I960) && (defined __GNUC__))
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#pragma align 0 /* turn off alignment requirement */
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#endif /* CPU_FAMILY==I960 */
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/* flag bits for ipt_flg */
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#define IPOPT_TS_TSONLY 0 /* timestamps only */
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#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
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#define IPOPT_TS_PRESPEC 3 /* specified modules only */
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/* bits for security (not byte swapped) */
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#define IPOPT_SECUR_UNCLASS 0x0000
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#define IPOPT_SECUR_CONFID 0xf135
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#define IPOPT_SECUR_EFTO 0x789a
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#define IPOPT_SECUR_MMMM 0xbc4d
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#define IPOPT_SECUR_RESTR 0xaf13
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#define IPOPT_SECUR_SECRET 0xd788
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#define IPOPT_SECUR_TOPSECRET 0x6bc5
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/*
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* Internet implementation parameters.
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*/
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#define MAXTTL 255 /* maximum time to live (seconds) */
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#define IPDEFTTL 64 /* default ttl, from RFC 1340 */
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#define IPFRAGTTL 60 /* time to live for frags, slowhz */
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#define IPTTLDEC 1 /* subtracted when forwarding */
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#define IP_MSS 576 /* default maximum segment size */
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#define IPFORWARDING 1 /* Set IP to always forward */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCiph */
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