Hi,
I am getting an assertion failure (after extended use) in etharp.c
LWIP assertion failure, file: netif/etharp.c, line: 886
no packet queues allowed!
Looking at the code:
p = q;
while (p) {
LWIP_ASSERT("no packet queues allowed!", (p->len == p->tot_len)
|| (p->next == 0));
if(p->flags != PBUF_FLAG_ROM) {
copy_needed = 1;
break;
}
p = p->next;
}
I think the intent is to ensure that only single packets are queued up
on ARP entries, not queues of packets.
To me the code says that q must point to a pbuf that has just one
element (p->len == p->tot_len case). If there were two pbufs in a
chain, the first pbuf would fail both conditions (p->len would
presumably be less than p->tot_len and p->next wouldn't be NULL).
I think the code should have said:
p = q;
while (p) {
LWIP_ASSERT("no packet queues allowed!", (p->tot_len == (p->len
+ (p->next ? p->next->tot_len:0) );
if(p->flags != PBUF_FLAG_ROM) {
copy_needed = 1;
break;
}
p = p->next;
}
Or am I missing something?
Cheers,
Robin
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