Major rework of the user-space event filtering

This patch reworks the user-space filtering. Although we have
kernel-space filtering since Linux kernel >= 2.6.26, we keep userspace
filtering to ensure backward compatibility. Moreover, this patch
prepares the implementation of the kernel-space filtering via
libnetfilter_conntrack's high-level berkeley socket filter API.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 0 insertions, 35 deletions

diff --git a/src/state_helper_tcp.c b/src/state_helper_tcp.c
deleted file mode 100644
index 88af35e..0000000
--- a/src/state_helper_tcp.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * (C) 2006-2007 by Pablo Neira Ayuso <pablo@netfilter.org>
- * 
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include "conntrackd.h"
-#include "state_helper.h"
-
-static int tcp_verdict(const struct state_replication_helper *h,
-		       const struct nf_conntrack *ct)
-{
-	uint8_t t_state = nfct_get_attr_u8(ct, ATTR_TCP_STATE);
-	if (h->state & (1 << t_state))
-		return ST_H_REPLICATE;
-
-	return ST_H_SKIP;
-}
-
-struct state_replication_helper tcp_state_helper = {
-	.proto 		= IPPROTO_TCP,
-	.verdict 	= tcp_verdict,
-};