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authorDavid S. Miller <davem@davemloft.net>2011-03-01 13:19:07 -0800
committerDavid S. Miller <davem@davemloft.net>2011-03-01 13:19:07 -0800
commit68d0c6d34d586a893292d4fb633a3bf8c547b222 (patch)
treeb6d812307621873cf16000171563c1f68b5bc255 /net/ipv6/syncookies.c
parent903ab86d195cca295379699299c5fc10beba31c7 (diff)
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 'net/ipv6/syncookies.c')
-rw-r--r--net/ipv6/syncookies.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 09fd34f0dbf..0b4cf350631 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -243,12 +243,9 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
fl.fl_ip_dport = inet_rsk(req)->rmt_port;
fl.fl_ip_sport = inet_sk(sk)->inet_sport;
security_req_classify_flow(req, &fl);
- if (ip6_dst_lookup(sk, &dst, &fl))
- goto out_free;
- if (final_p)
- ipv6_addr_copy(&fl.fl6_dst, final_p);
- if ((xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0)
+ dst = ip6_dst_lookup_flow(sk, &fl, final_p, false);
+ if (IS_ERR(dst))
goto out_free;
}