[IPSEC]: Added xfrm_decode_session_reverse and xfrmX_policy_check_reverse

[linux-2.6-omap-h63xx.git] / net / ipv4 / xfrm4_policy.c

diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 10b72d185bb9c5450a89a2199cec5a772fe3a770..5ccae3a463c244f8837e826d5142064cead24071 100644 (file)
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -115,7 +115,7 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev)
 }
 
 static void
-_decode_session4(struct sk_buff *skb, struct flowi *fl)
+_decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
 {
        struct iphdr *iph = ip_hdr(skb);
        u8 *xprth = skb_network_header(skb) + iph->ihl * 4;
@@ -131,8 +131,8 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl)
                        if (pskb_may_pull(skb, xprth + 4 - skb->data)) {
                                __be16 *ports = (__be16 *)xprth;
 
-                               fl->fl_ip_sport = ports[0];
-                               fl->fl_ip_dport = ports[1];
+                               fl->fl_ip_sport = ports[!!reverse];
+                               fl->fl_ip_dport = ports[!reverse];
                        }
                        break;
 
@@ -174,8 +174,8 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl)
                }
        }
        fl->proto = iph->protocol;
-       fl->fl4_dst = iph->daddr;
-       fl->fl4_src = iph->saddr;
+       fl->fl4_dst = reverse ? iph->saddr : iph->daddr;
+       fl->fl4_src = reverse ? iph->daddr : iph->saddr;
        fl->fl4_tos = iph->tos;
 }