| /* |
| * (C) 2003,2004 USAGI/WIDE Project <http://www.linux-ipv6.org> |
| * |
| * Based largely upon the original ip_conntrack code which |
| * had the following copyright information: |
| * |
| * (C) 1999-2001 Paul `Rusty' Russell |
| * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Author: |
| * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/ip.h> |
| #include <linux/netfilter.h> |
| #include <linux/module.h> |
| #include <linux/skbuff.h> |
| #include <linux/icmp.h> |
| #include <linux/sysctl.h> |
| #include <net/ip.h> |
| |
| #include <linux/netfilter_ipv4.h> |
| #include <net/netfilter/nf_conntrack.h> |
| #include <net/netfilter/nf_conntrack_l4proto.h> |
| #include <net/netfilter/nf_conntrack_l3proto.h> |
| #include <net/netfilter/nf_conntrack_core.h> |
| #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> |
| |
| static bool generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, |
| struct nf_conntrack_tuple *tuple) |
| { |
| memset(&tuple->src.u3, 0, sizeof(tuple->src.u3)); |
| memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3)); |
| |
| return true; |
| } |
| |
| static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple, |
| const struct nf_conntrack_tuple *orig) |
| { |
| memset(&tuple->src.u3, 0, sizeof(tuple->src.u3)); |
| memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3)); |
| |
| return true; |
| } |
| |
| static int generic_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, |
| unsigned int *dataoff, u_int8_t *protonum) |
| { |
| /* Never track !!! */ |
| return -NF_ACCEPT; |
| } |
| |
| |
| struct nf_conntrack_l3proto nf_conntrack_l3proto_generic __read_mostly = { |
| .l3proto = PF_UNSPEC, |
| .pkt_to_tuple = generic_pkt_to_tuple, |
| .invert_tuple = generic_invert_tuple, |
| .get_l4proto = generic_get_l4proto, |
| }; |
| EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_generic); |