diff options
Diffstat (limited to 'net/ipv4/netfilter/ip_nat_proto_gre.c')
| -rw-r--r-- | net/ipv4/netfilter/ip_nat_proto_gre.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/net/ipv4/netfilter/ip_nat_proto_gre.c b/net/ipv4/netfilter/ip_nat_proto_gre.c index 38acfdf540e..bf91f9312b3 100644 --- a/net/ipv4/netfilter/ip_nat_proto_gre.c +++ b/net/ipv4/netfilter/ip_nat_proto_gre.c @@ -6,10 +6,10 @@ * GRE is a generic encapsulation protocol, which is generally not very * suited for NAT, as it has no protocol-specific part as port numbers. * - * It has an optional key field, which may help us distinguishing two + * It has an optional key field, which may help us distinguishing two * connections between the same two hosts. * - * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 + * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 * * PPTP is built on top of a modified version of GRE, and has a mandatory * field called "CallID", which serves us for the same purpose as the key @@ -60,14 +60,14 @@ gre_in_range(const struct ip_conntrack_tuple *tuple, } /* generate unique tuple ... */ -static int +static int gre_unique_tuple(struct ip_conntrack_tuple *tuple, const struct ip_nat_range *range, enum ip_nat_manip_type maniptype, const struct ip_conntrack *conntrack) { static u_int16_t key; - u_int16_t *keyptr; + __be16 *keyptr; unsigned int min, i, range_size; if (maniptype == IP_NAT_MANIP_SRC) @@ -84,7 +84,7 @@ gre_unique_tuple(struct ip_conntrack_tuple *tuple, range_size = ntohs(range->max.gre.key) - min + 1; } - DEBUGP("min = %u, range_size = %u\n", min, range_size); + DEBUGP("min = %u, range_size = %u\n", min, range_size); for (i = 0; i < range_size; i++, key++) { *keyptr = htons(min + key % range_size); @@ -117,7 +117,7 @@ gre_manip_pkt(struct sk_buff **pskb, greh = (void *)(*pskb)->data + hdroff; pgreh = (struct gre_hdr_pptp *) greh; - /* we only have destination manip of a packet, since 'source key' + /* we only have destination manip of a packet, since 'source key' * is not present in the packet itself */ if (maniptype == IP_NAT_MANIP_DST) { /* key manipulation is always dest */ @@ -129,15 +129,16 @@ gre_manip_pkt(struct sk_buff **pskb, } if (greh->csum) { /* FIXME: Never tested this code... */ - *(gre_csum(greh)) = - ip_nat_cheat_check(~*(gre_key(greh)), + *(gre_csum(greh)) = + nf_proto_csum_update(*pskb, + ~*(gre_key(greh)), tuple->dst.u.gre.key, - *(gre_csum(greh))); + *(gre_csum(greh)), 0); } *(gre_key(greh)) = tuple->dst.u.gre.key; break; case GRE_VERSION_PPTP: - DEBUGP("call_id -> 0x%04x\n", + DEBUGP("call_id -> 0x%04x\n", ntohs(tuple->dst.u.gre.key)); pgreh->call_id = tuple->dst.u.gre.key; break; @@ -151,8 +152,8 @@ gre_manip_pkt(struct sk_buff **pskb, } /* nat helper struct */ -static struct ip_nat_protocol gre = { - .name = "GRE", +static struct ip_nat_protocol gre = { + .name = "GRE", .protonum = IPPROTO_GRE, .manip_pkt = gre_manip_pkt, .in_range = gre_in_range, @@ -163,7 +164,7 @@ static struct ip_nat_protocol gre = { .nfattr_to_range = ip_nat_port_nfattr_to_range, #endif }; - + int __init ip_nat_proto_gre_init(void) { return ip_nat_protocol_register(&gre); |