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authorHarald Welte <laforge@netfilter.org>2005-11-03 13:05:20 +0100
committerArnaldo Carvalho de Melo <acme@mandriva.com>2005-11-04 23:19:17 -0200
commitd811552eda2476215d69d485e437d2dcae1ab0b4 (patch)
treeeb745550f1d2e40dafc71d95c20ec3e46ce9fdda /net/ipv4
parent3428c209c6820bbbb7dfb323caef8d402b3deb4c (diff)
[NETFILTER] PPTP helper: Fix endianness bug in GRE key / CallID NAT
This endianness bug slipped through while changing the 'gre.key' field in the conntrack tuple from 32bit to 16bit. None of my tests caught the problem, since the linux pptp client always has '0' as call id / gre key. Only windows clients actually trigger the bug. Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/netfilter/ip_nat_proto_gre.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/netfilter/ip_nat_proto_gre.c b/net/ipv4/netfilter/ip_nat_proto_gre.c
index 7c128540167..f7cad7cf1ae 100644
--- a/net/ipv4/netfilter/ip_nat_proto_gre.c
+++ b/net/ipv4/netfilter/ip_nat_proto_gre.c
@@ -139,8 +139,8 @@ gre_manip_pkt(struct sk_buff **pskb,
break;
case GRE_VERSION_PPTP:
DEBUGP("call_id -> 0x%04x\n",
- ntohl(tuple->dst.u.gre.key));
- pgreh->call_id = htons(ntohl(tuple->dst.u.gre.key));
+ ntohs(tuple->dst.u.gre.key));
+ pgreh->call_id = tuple->dst.u.gre.key;
break;
default:
DEBUGP("can't nat unknown GRE version\n");