/* (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. */#include <linux/types.h>#include <linux/sched.h>#include <linux/timer.h>#include <linux/netfilter.h>#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>unsigned long ip_ct_generic_timeout = 600*HZ;static int generic_pkt_to_tuple(const struct sk_buff *skb,				unsigned int dataoff,				struct ip_conntrack_tuple *tuple){	tuple->src.u.all = 0;	tuple->dst.u.all = 0;	return 1;}static int generic_invert_tuple(struct ip_conntrack_tuple *tuple,				const struct ip_conntrack_tuple *orig){	tuple->src.u.all = 0;	tuple->dst.u.all = 0;	return 1;}/* Print out the per-protocol part of the tuple. */static unsigned int generic_print_tuple(char *buffer,					const struct ip_conntrack_tuple *tuple){	return 0;}/* Print out the private part of the conntrack. */static unsigned int generic_print_conntrack(char *buffer,					    const struct ip_conntrack *state){	return 0;}/* Returns verdict for packet, or -1 for invalid. */static int packet(struct ip_conntrack *conntrack,		  const struct sk_buff *skb,		  enum ip_conntrack_info conntrackinfo){	ip_ct_refresh(conntrack, ip_ct_generic_timeout);	return NF_ACCEPT;}/* Called when a new connection for this protocol found. */static int new(struct ip_conntrack *conntrack, const struct sk_buff *skb){	return 1;}struct ip_conntrack_protocol ip_conntrack_generic_protocol= { { NULL, NULL }, 0, "unknown",    generic_pkt_to_tuple, generic_invert_tuple, generic_print_tuple,    generic_print_conntrack, packet, new, NULL, NULL, NULL };