first step forward to merge conntrackd and conntrack into the same building chain

1 files changed, 151 insertions, 0 deletions

diff --git a/src/stats-mode.c b/src/stats-mode.c
new file mode 100644
index 0000000..9647bbf
--- /dev/null
+++ b/src/stats-mode.c
@@ -0,0 +1,151 @@
+/*
+ * (C) 2006 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 <stdlib.h>
+#include "cache.h"
+#include "conntrackd.h"
+#include <libnfnetlink/libnfnetlink.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+#include <errno.h>
+#include "us-conntrack.h"
+#include <signal.h>
+#include <sys/select.h>
+
+static int init_stats(void)
+{
+	int ret;
+
+	state.stats = malloc(sizeof(struct ct_stats_state));
+	if (!state.stats) {
+		dlog(STATE(log), "[FAIL] can't allocate memory for stats sync");
+		return -1;
+	}
+	memset(state.stats, 0, sizeof(struct ct_stats_state));
+
+	STATE_STATS(cache) = cache_create("stats",
+					  LIFETIME, 
+					  CONFIG(family),
+					  NULL); 
+	if (!STATE_STATS(cache)) {
+		dlog(STATE(log), "[FAIL] can't allocate memory for the "
+				 "external cache");
+		return -1;
+	}
+
+	return 0;
+}
+
+static void kill_stats()
+{
+	cache_destroy(STATE_STATS(cache));
+}
+
+/* handler for requests coming via UNIX socket */
+static int local_handler_stats(int fd, int type, void *data)
+{
+	int ret = 1;
+
+	switch(type) {
+	case DUMP_INTERNAL:
+		cache_dump(STATE_STATS(cache), fd, NFCT_O_PLAIN);
+		break;
+	case DUMP_INT_XML:
+		cache_dump(STATE_SYNC(internal), fd, NFCT_O_XML);
+		break;
+	case FLUSH_CACHE:
+		dlog(STATE(log), "[REQ] flushing caches");
+		cache_flush(STATE_STATS(cache));
+		break;
+	case KILL:
+		killer();
+		break;
+	case STATS:
+		cache_stats(STATE_STATS(cache), fd);
+		dump_traffic_stats(fd);
+		break;
+	default:
+		ret = 0;
+		break;
+	}
+
+	return ret;
+}
+
+static void dump_stats(struct nf_conntrack *ct, struct nlmsghdr *nlh)
+{
+	if (cache_update_force(STATE_STATS(cache), ct))
+		debug_ct(ct, "resync entry");
+}
+
+static void event_new_stats(struct nf_conntrack *ct, struct nlmsghdr *nlh)
+{
+	debug_ct(ct, "debug event");
+	if (cache_add(STATE_STATS(cache), ct)) {
+		debug_ct(ct, "cache new");
+	} else {
+		dlog(STATE(log), "can't add to cache cache: "
+				      "%s\n", strerror(errno));
+		debug_ct(ct, "can't add");
+	}
+}
+
+static void event_update_stats(struct nf_conntrack *ct, struct nlmsghdr *nlh)
+{
+	debug_ct(ct, "update");
+
+	if (!cache_update(STATE_STATS(cache), ct)) {
+		/*
+		 * Perhaps we are losing events. If we are working 
+		 * in relax mode then add a new entry to the cache.
+		 *
+		 * FIXME: relax transitions not implemented yet
+		 */
+		if ((CONFIG(flags) & RELAX_TRANSITIONS)
+		    && cache_add(STATE_STATS(cache), ct)) {
+			debug_ct(ct, "forcing cache update");
+		} else {
+			debug_ct(ct, "can't update");
+			return;
+		}
+	}
+	debug_ct(ct, "update");
+}
+
+static int event_destroy_stats(struct nf_conntrack *ct, struct nlmsghdr *nlh)
+{
+	if (cache_del(STATE_STATS(cache), ct)) {
+		debug_ct(ct, "cache destroy");
+		return 1;
+	} else {
+		debug_ct(ct, "can't destroy!");
+		return 0;
+	}
+}
+
+struct ct_mode stats_mode = {
+	.init 			= init_stats,
+	.add_fds_to_set 	= NULL,
+	.step			= NULL,
+	.local			= local_handler_stats,
+	.kill			= kill_stats,
+	.dump			= dump_stats,
+	.overrun		= dump_stats,
+	.event_new		= event_new_stats,
+	.event_upd		= event_update_stats,
+	.event_dst		= event_destroy_stats
+};