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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-12-12 19:44:16 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 23:57:22 +0100 |
| commit | d5422efe680fc55010c6ddca2370ca9548a96355 (patch) | |
| tree | f72fa5eb779c8ae7d49688a9caac9b69a1f3bd58 /net/ipv6/xfrm6_policy.c | |
| parent | [IPSEC]: Make xfrm_lookup flags argument a bit-field (diff) | |
| download | linux-d5422efe680fc55010c6ddca2370ca9548a96355.tar.xz linux-d5422efe680fc55010c6ddca2370ca9548a96355.zip | |
[IPSEC]: Added xfrm_decode_session_reverse and xfrmX_policy_check_reverse
RFC 4301 requires us to relookup ICMP traffic that does not match any
policies using the reverse of its payload. This patch adds the functions
xfrm_decode_session_reverse and xfrmX_policy_check_reverse so we can get
the reverse flow to perform such a lookup.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/xfrm6_policy.c')
| -rw-r--r-- | net/ipv6/xfrm6_policy.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 181cf91538f1..d26b7dc3f33b 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -123,7 +123,7 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev) } static inline void -_decode_session6(struct sk_buff *skb, struct flowi *fl) +_decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse) { u16 offset = skb_network_header_len(skb); struct ipv6hdr *hdr = ipv6_hdr(skb); @@ -132,8 +132,8 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl) u8 nexthdr = nh[IP6CB(skb)->nhoff]; memset(fl, 0, sizeof(struct flowi)); - ipv6_addr_copy(&fl->fl6_dst, &hdr->daddr); - ipv6_addr_copy(&fl->fl6_src, &hdr->saddr); + ipv6_addr_copy(&fl->fl6_dst, reverse ? &hdr->saddr : &hdr->daddr); + ipv6_addr_copy(&fl->fl6_src, reverse ? &hdr->daddr : &hdr->saddr); while (pskb_may_pull(skb, nh + offset + 1 - skb->data)) { nh = skb_network_header(skb); @@ -156,8 +156,8 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl) if (pskb_may_pull(skb, nh + offset + 4 - skb->data)) { __be16 *ports = (__be16 *)exthdr; - fl->fl_ip_sport = ports[0]; - fl->fl_ip_dport = ports[1]; + fl->fl_ip_sport = ports[!!reverse]; + fl->fl_ip_dport = ports[!reverse]; } fl->proto = nexthdr; return; |