Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[cascardo/linux.git] / net / ipv4 / netfilter / nf_nat_proto_gre.c

diff --git a/net/ipv4/netfilter/nf_nat_proto_gre.c b/net/ipv4/netfilter/nf_nat_proto_gre.c
index e5a34c1..c3908bc 100644 (file)
--- a/net/ipv4/netfilter/nf_nat_proto_gre.c
+++ b/net/ipv4/netfilter/nf_nat_proto_gre.c
@@ -72,6 +72,11 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple,
        __be16 *keyptr;
        unsigned int min, i, range_size;
 
+       /* If there is no master conntrack we are not PPTP,
+          do not change tuples */
+       if (!conntrack->master)
+               return 0;
+
        if (maniptype == IP_NAT_MANIP_SRC)
                keyptr = &tuple->src.u.gre.key;
        else
@@ -122,18 +127,9 @@ gre_manip_pkt(struct sk_buff **pskb, unsigned int iphdroff,
        if (maniptype != IP_NAT_MANIP_DST)
                return 1;
        switch (greh->version) {
-       case 0:
-               if (!greh->key) {
-                       DEBUGP("can't nat GRE w/o key\n");
-                       break;
-               }
-               if (greh->csum) {
-                       /* FIXME: Never tested this code... */
-                       nf_proto_csum_replace4(gre_csum(greh), *pskb,
-                                              *(gre_key(greh)),
-                                              tuple->dst.u.gre.key, 0);
-               }
-               *(gre_key(greh)) = tuple->dst.u.gre.key;
+       case GRE_VERSION_1701:
+               /* We do not currently NAT any GREv0 packets.
+                * Try to behave like "nf_nat_proto_unknown" */
                break;
        case GRE_VERSION_PPTP:
                DEBUGP("call_id -> 0x%04x\n", ntohs(tuple->dst.u.gre.key));