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| author | David S. Miller <davem@davemloft.net> | 2011-03-01 22:19:07 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-01 22:19:07 +0100 |
| commit | 68d0c6d34d586a893292d4fb633a3bf8c547b222 (patch) | |
| tree | b6d812307621873cf16000171563c1f68b5bc255 /include/net/ipv6.h | |
| parent | udp: Add lockless transmit path (diff) | |
| download | linux-68d0c6d34d586a893292d4fb633a3bf8c547b222.tar.xz linux-68d0c6d34d586a893292d4fb633a3bf8c547b222.zip | |
ipv6: Consolidate route lookup sequences.
Route lookups follow a general pattern in the ipv6 code wherein
we first find the non-IPSEC route, potentially override the
flow destination address due to ipv6 options settings, and then
finally make an IPSEC search using either xfrm_lookup() or
__xfrm_lookup().
__xfrm_lookup() is used when we want to generate a blackhole route
if the key manager needs to resolve the IPSEC rules (in this case
-EREMOTE is returned and the original 'dst' is left unchanged).
Otherwise plain xfrm_lookup() is used and when asynchronous IPSEC
resolution is necessary, we simply fail the lookup completely.
All of these cases are encapsulated into two routines,
ip6_dst_lookup_flow and ip6_sk_dst_lookup_flow. The latter of which
handles unconnected UDP datagram sockets.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 4a3cd2cd2f5e..1fc5631cf1a2 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -512,12 +512,17 @@ extern void ip6_flush_pending_frames(struct sock *sk); extern int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl); +extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk, + struct flowi *fl, + const struct in6_addr *final_dst, + bool want_blackhole); +extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk, + struct flowi *fl, + const struct in6_addr *final_dst, + bool want_blackhole); extern int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dst, struct flowi *fl); -extern int ip6_sk_dst_lookup(struct sock *sk, - struct dst_entry **dst, - struct flowi *fl); /* * skb processing functions |