ipv6: sr: export function lookup_nexthop
authorMathieu Xhonneux <m.xhonneux@gmail.com>
Sun, 20 May 2018 13:58:13 +0000 (14:58 +0100)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 24 May 2018 09:57:35 +0000 (11:57 +0200)
commit1c1e761ef1a08a878a040e67979711015cfc163e
tree599b0d5c23abc9d80472c0c813c00a9c8b9deaab
parent63526e1c805b5a8992d25386d315009fcabac8e2
ipv6: sr: export function lookup_nexthop

The function lookup_nexthop is essential to implement most of the seg6local
actions. As we want to provide a BPF helper allowing to apply some of these
actions on the packet being processed, the helper should be able to call
this function, hence the need to make it public.

Moreover, if one argument is incorrect or if the next hop can not be found,
an error should be returned by the BPF helper so the BPF program can adapt
its processing of the packet (return an error, properly force the drop,
...). This patch hence makes this function return dst->error to indicate a
possible error.

Signed-off-by: Mathieu Xhonneux <m.xhonneux@gmail.com>
Acked-by: David Lebrun <dlebrun@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
include/net/seg6.h
include/net/seg6_local.h [new file with mode: 0644]
net/ipv6/seg6_local.c