MagnitudeOS/lwip
1
0
Fork 0
forked from Imagelibrary/lwip
Code Pull Requests Activity

Fixed up and made work a PBUF_REF type. Most of the code uses this now

Browse Source 
instead of PBUF_ROM. This addition allows support of copy-on-demand where the
lower layers can call pbuf_unref() which tests for any PBUF_REF buffers and
replaces them with PBUF_POOL buffers. This is now used
everywhere. pbuf_unref() is called in ARP queueing and in the coldfire
driver, which puts frames on a DMA queue and frees them later.

Along with this change pbuf_free() now goes through the entire chain of
buffers and tests all the ref counters, not just the first one. Generally now
pbuf_ref_chain() should be called and not pbuf_ref(). This change was made
because it is possible for the head of the pbuf chain to have a different
count than the payload pbuf which might have been passed by the application.
This commit is contained in:
davidhaas
2003-03-19 22:14:49 +00:00
parent 2f7e4bd587
commit 32d9f25a6f
7 changed files with 103 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/netif/etharp.c
View File

@@ -235,6 +235,7 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
{
u8_t i, k;
#if ARP_QUEUEING
struct pbuf *p;
struct eth_hdr *ethhdr;
#endif
DEBUGF(ETHARP_DEBUG, ("update_arp_entry()"));
@@ -270,21 +271,20 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
arp_table[i].ctime = 0;
#if ARP_QUEUEING
/* queued packet present? */
if(arp_table[i].p != NULL) {
if((p = arp_table[i].p) != NULL) {
/* Null out attached buffer immediately */
arp_table[i].p = NULL;
/* fill-in Ethernet header */
ethhdr = arp_table[i].p->payload;
ethhdr = p->payload;
for(k = 0; k < 6; ++k) {
ethhdr->dest.addr[k] = ethaddr->addr[k];
}
ethhdr->type = htons(ETHTYPE_IP);
DEBUGF(ETHARP_DEBUG, ("update_arp_entry: sending queued IP packet.\n"));
/* send the queued IP packet */
netif->linkoutput(netif, arp_table[i].p);
netif->linkoutput(netif, p);
/* free the queued IP packet */
pbuf_free(arp_table[i].p);
/* remove queued packet from ARP entry (must be freed by the caller) */
arp_table[i].p = NULL;
pbuf_free(p);
}
#endif
return NULL;