Hi
I have problem with clear distinction of route lookup start-end places.
I have read linux-networking, where route lookup was decribed for 2.2.x
kernel.
Although i am curr. working with 2.4.x. And i would like to know where the
route lookup process (function) starts for the packet in ipv4:
is this here ?:
static inline int ip_rcv_finish(struct sk_buff *skb)
{
...
if (skb->dst == NULL) {
316 if (ip_route_input(skb, iph->daddr, iph->saddr,
iph->tos, dev)) <<<<<<<
317 goto drop;
318 }
..is this the only place where net code calls routing lookup?
... i know that there is slow path and cache path. So each time first packet
from a flow comes it installs an entry in route cache. On the other hand in
route.c there are ip_route_input_slow and ip_route_output_slow functions-
what is the difference?
regards
adam
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