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Important fix from HEAD merged.

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likewise 2004-04-23 15:45:53 +00:00
parent 2c02689d5c
commit a5ce8ca555
1 changed files with 26 additions and 19 deletions
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45
src/netif/etharp.c
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@ -372,20 +372,22 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
#if ARP_QUEUEING
/* get the first packet on the queue (if any) */
p = arp_table[i].p;
/* queued packet present? */
/* (another) queued packet present? */
while (p != NULL) {
struct pbuf *q, *n;
/* search for second packet on queue (n) */
q = p;
while (q->tot_len > q->len) {
/* proceed to next pbuf of this packet */
LWIP_ASSERT("q->next ! NULL", q->next != NULL);
q = q->next;
LWIP_ASSERT("q->next != NULL (while q->tot_len > q->len)", q->next != NULL);
/* proceed to next pbuf of this packet */
q = q->next;
}
/* { q = last pbuf of first packet, q->tot_len = q->len } */
/* { q = last pbuf of this packet, q->tot_len == q->len } */
LWIP_ASSERT("q->tot_len == q->len", q->tot_len == q->len);
/* remember next packet on queue */
n = q->next;
/* { n = first pbuf of 2nd packet, or NULL if no 2nd packet } */
/* terminate the first packet pbuf chain */
/* { n = first pbuf of next packet, or NULL if no next packet } */
/* terminate this packet pbuf chain */
q->next = NULL;
/* fill-in Ethernet header */
ethhdr = p->payload;
@ -394,7 +396,7 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
ethhdr->src.addr[k] = netif->hwaddr[k];
}
ethhdr->type = htons(ETHTYPE_IP);
LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: sending queued IP packet %p.\n",(void *)p));
LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: sending queued IP packet %p.\n", (void *)p));
/* send the queued IP packet */
netif->linkoutput(netif, p);
/* free the queued IP packet */
@ -405,10 +407,11 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
/* NULL attached buffer*/
arp_table[i].p = NULL;
#endif
/* IP addresses should only occur once in the ARP entry, we are done */
return NULL;
}
} /* if */
} /* for */
} /* if STABLE */
} /* for all ARP entries */
/* no matching ARP entry was found */
LWIP_ASSERT("update_arp_entry: i == ARP_TABLE_SIZE", i == ARP_TABLE_SIZE);
@ -582,7 +585,7 @@ etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
/* ARP reply. We insert or update the ARP table later. */
LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: incoming ARP reply\n"));
#if (LWIP_DHCP && DHCP_DOES_ARP_CHECK)
/* DHCP needs to know about ARP replies to our address */
/* DHCP wants to know about ARP replies to our wanna-have-address */
if (for_us) dhcp_arp_reply(netif, &hdr->sipaddr);
#endif
break;
@ -770,9 +773,14 @@ err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q)
}
else if (arp_table[i].state == ETHARP_STATE_STABLE) {
LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | DBG_STATE, ("etharp_query: requested IP already stable as entry %u\n", i));
/* user may wish to queue a packet on a stable entry, so we proceed without ARP requesting */
/* TODO: even if the ARP entry is stable, we might do an ARP request anyway */
perform_arp_request = 0;
/* User wishes to queue a packet on a stable entry (or does she want to send
* out the packet immediately, we will not know), so we force an ARP request.
* Upon response we will send out the queued packet in etharp_update().
*
* Alternatively, we could accept the stable entry, and just send out the packet
* immediately. I chose to implement the former approach.
*/
perform_arp_request = (q?1:0);
break;
}
}
@ -790,12 +798,11 @@ err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q)
/* i is available, create ARP entry */
arp_table[i].state = ETHARP_STATE_PENDING;
ip_addr_set(&arp_table[i].ipaddr, ipaddr);
/* queried address was already in ARP table */
} else {
#if ARP_QUEUEING
etharp_enqueue(i, q);
#endif
}
/* { i is now valid } */
#if ARP_QUEUEING /* queue packet (even on a stable entry, see above) */
etharp_enqueue(i, q);
#endif
/* ARP request? */
if (perform_arp_request)
{