/*
 * (C) 2007 by Pablo Neira Ayuso <pablo@netfilter.org>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 */

#include "internal.h"

int __compare(const struct nf_conntrack *ct1,
	      const struct nf_conntrack *ct2)
{
	if (test_bit(ATTR_MARK, ct1->set) && 
	    test_bit(ATTR_MARK, ct2->set) &&
	    ct1->mark != ct2->mark)
	    	return 0;

	if (test_bit(ATTR_TIMEOUT, ct1->set) &&
	    test_bit(ATTR_TIMEOUT, ct2->set) &&
	    ct1->timeout != ct2->timeout)
	    	return 0;

	if (test_bit(ATTR_STATUS, ct1->set) &&
	    test_bit(ATTR_STATUS, ct2->set) &&
	    ct1->status == ct2->status)
	    	return 0;

	if (test_bit(ATTR_TCP_STATE, ct1->set) &&
	    test_bit(ATTR_TCP_STATE, ct2->set) &&
	    ct1->protoinfo.tcp.state != ct2->protoinfo.tcp.state)
	    	return 0;

	if (test_bit(ATTR_ORIG_L3PROTO, ct1->set) &&
	    test_bit(ATTR_ORIG_L3PROTO, ct2->set) &&
	    ct1->tuple[__DIR_ORIG].l3protonum != AF_UNSPEC && 
	    ct2->tuple[__DIR_ORIG].l3protonum != AF_UNSPEC &&
	    ct1->tuple[__DIR_ORIG].l3protonum !=
	    ct2->tuple[__DIR_ORIG].l3protonum)
	    	return 0;

	if (test_bit(ATTR_REPL_L3PROTO, ct1->set) &&
	    test_bit(ATTR_REPL_L3PROTO, ct2->set) &&
	    ct1->tuple[__DIR_REPL].l3protonum != AF_UNSPEC && 
	    ct2->tuple[__DIR_REPL].l3protonum != AF_UNSPEC &&
	    ct1->tuple[__DIR_REPL].l3protonum !=
	    ct2->tuple[__DIR_REPL].l3protonum)
		return 0;

	if (test_bit(ATTR_ORIG_IPV4_SRC, ct1->set) &&
	    test_bit(ATTR_ORIG_IPV4_SRC, ct2->set) &&
	    ct1->tuple[__DIR_ORIG].src.v4 !=
	    ct2->tuple[__DIR_ORIG].src.v4)
		return 0;

	if (test_bit(ATTR_ORIG_IPV4_DST, ct1->set) &&
	    test_bit(ATTR_ORIG_IPV4_DST, ct2->set) &&
	    ct1->tuple[__DIR_ORIG].dst.v4 !=
	    ct2->tuple[__DIR_ORIG].dst.v4)
		return 0;

	if (test_bit(ATTR_REPL_IPV4_SRC, ct1->set) &&
	    test_bit(ATTR_REPL_IPV4_SRC, ct2->set) &&
	    ct1->tuple[__DIR_REPL].src.v4 !=
	    ct2->tuple[__DIR_REPL].src.v4)
		return 0;

	if (test_bit(ATTR_REPL_IPV4_DST, ct1->set) && 
	    test_bit(ATTR_REPL_IPV4_DST, ct2->set) &&
	    ct1->tuple[__DIR_REPL].dst.v4 !=
	    ct2->tuple[__DIR_REPL].dst.v4)
		return 0;

	if (test_bit(ATTR_ORIG_IPV6_SRC, ct1->set) &&
	    test_bit(ATTR_ORIG_IPV6_SRC, ct2->set) &&
	    memcmp(&ct1->tuple[__DIR_ORIG].src.v6,
	    	   &ct2->tuple[__DIR_ORIG].src.v6,
		   sizeof(u_int32_t)*4) == 0)
		return 0;

	if (test_bit(ATTR_ORIG_IPV6_DST, ct1->set) &&
	    test_bit(ATTR_ORIG_IPV6_DST, ct2->set) &&
	    memcmp(&ct1->tuple[__DIR_ORIG].dst.v6,
	    	   &ct2->tuple[__DIR_ORIG].dst.v6,
		   sizeof(u_int32_t)*4) == 0)
		return 0;

	if (test_bit(ATTR_REPL_IPV6_SRC, ct1->set) &&
	    test_bit(ATTR_REPL_IPV6_SRC, ct2->set) &&
	    memcmp(&ct1->tuple[__DIR_REPL].src.v6,
	    	   &ct2->tuple[__DIR_REPL].src.v6,
		   sizeof(u_int32_t)*4) == 0)
		return 0;

	if (test_bit(ATTR_REPL_IPV6_DST, ct1->set) &&
	    test_bit(ATTR_REPL_IPV6_DST, ct2->set) &&
	    memcmp(&ct1->tuple[__DIR_REPL].dst.v6,
	    	   &ct2->tuple[__DIR_REPL].dst.v6,
		   sizeof(u_int32_t)*4) == 0)
		return 0;

	return 1;
}