diff options
Diffstat (limited to 'net/ipv4/netfilter/nf_nat_proto_gre.c')
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_proto_gre.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/ipv4/netfilter/nf_nat_proto_gre.c b/net/ipv4/netfilter/nf_nat_proto_gre.c index 9414923f1e15..edf05002d674 100644 --- a/net/ipv4/netfilter/nf_nat_proto_gre.c +++ b/net/ipv4/netfilter/nf_nat_proto_gre.c @@ -88,8 +88,8 @@ gre_manip_pkt(struct sk_buff *skb, const struct nf_conntrack_tuple *tuple, enum nf_nat_manip_type maniptype) { - const struct gre_hdr *greh; - struct gre_hdr_pptp *pgreh; + const struct gre_base_hdr *greh; + struct pptp_gre_header *pgreh; /* pgreh includes two optional 32bit fields which are not required * to be there. That's where the magic '8' comes from */ @@ -97,18 +97,19 @@ gre_manip_pkt(struct sk_buff *skb, return false; greh = (void *)skb->data + hdroff; - pgreh = (struct gre_hdr_pptp *)greh; + pgreh = (struct pptp_gre_header *)greh; /* we only have destination manip of a packet, since 'source key' * is not present in the packet itself */ if (maniptype != NF_NAT_MANIP_DST) return true; - switch (greh->version) { - case GRE_VERSION_1701: + + switch (greh->flags & GRE_VERSION) { + case GRE_VERSION_0: /* We do not currently NAT any GREv0 packets. * Try to behave like "nf_nat_proto_unknown" */ break; - case GRE_VERSION_PPTP: + case GRE_VERSION_1: pr_debug("call_id -> 0x%04x\n", ntohs(tuple->dst.u.gre.key)); pgreh->call_id = tuple->dst.u.gre.key; break; |