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

1 files changed, 229 insertions, 0 deletions

diff --git a/src/cache_iterators.c b/src/cache_iterators.c
new file mode 100644
index 0000000..5d5d22b
--- /dev/null
+++ b/src/cache_iterators.c
@@ -0,0 +1,229 @@
+/*
+ * (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 "cache.h"
+#include "jhash.h"
+#include "hash.h"
+#include "conntrackd.h"
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+#include <errno.h>
+#include "us-conntrack.h"
+#include "debug.h"
+
+struct __dump_container {
+	int fd;
+	int type;
+};
+
+static int do_dump(void *data1, void *data2)
+{
+	char buf[1024];
+	int size;
+	struct __dump_container *container = data1;
+	struct us_conntrack *u = data2;
+	void *data = u->data;
+	int i;
+
+	memset(buf, 0, sizeof(buf));
+	size = nfct_snprintf(buf, 
+			     sizeof(buf), 
+			     u->ct, 
+			     NFCT_T_UNKNOWN, 
+			     container->type,
+			     0);
+
+	for (i = 0; i < u->cache->num_features; i++) {
+		if (u->cache->features[i]->dump) {
+			size += u->cache->features[i]->dump(u, 
+							    data, 
+							    buf+size,
+							    container->type);
+			data += u->cache->features[i]->size;
+		}
+	}
+	size += sprintf(buf+size, "\n");
+	if (send(container->fd, buf, size, 0) == -1) {
+		if (errno != EPIPE)
+			return -1;
+	}
+
+	return 0;
+}
+
+void cache_dump(struct cache *c, int fd, int type)
+{
+	struct __dump_container tmp = {
+		.fd	= fd,
+		.type	= type
+	};
+
+	lock();
+	hashtable_iterate(c->h, (void *) &tmp, do_dump);
+	unlock();
+}
+
+static int do_commit(void *data1, void *data2)
+{
+	int ret;
+	struct cache *c = data1;
+	struct us_conntrack *u = data2;
+	struct nf_conntrack *ct;
+	char buf[4096];
+	struct nlmsghdr *nlh = (struct nlmsghdr *)buf;
+
+	ct = nfct_clone(u->ct);
+	if (ct == NULL)
+		return 0;
+
+	if (nfct_attr_is_set(ct, ATTR_STATUS)) {
+		u_int32_t status = nfct_get_attr_u32(ct, ATTR_STATUS);
+		status &= ~IPS_EXPECTED;
+		nfct_set_attr_u32(ct, ATTR_STATUS, status);
+	}
+
+	if (nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT))
+		nfct_setobjopt(ct, NFCT_SOPT_UNDO_SNAT);
+	if (nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT))
+		nfct_setobjopt(ct, NFCT_SOPT_UNDO_DNAT);
+	if (nfct_getobjopt(ct, NFCT_GOPT_IS_SPAT))
+		nfct_setobjopt(ct, NFCT_SOPT_UNDO_SPAT);
+	if (nfct_getobjopt(ct, NFCT_GOPT_IS_DPAT))
+		nfct_setobjopt(ct, NFCT_SOPT_UNDO_DPAT);
+
+        /* 
+	 * Set a reduced timeout for candidate-to-be-committed
+	 * conntracks that live in the external cache
+	 */
+	nfct_set_attr_u32(ct, ATTR_TIMEOUT, CONFIG(commit_timeout));
+
+        ret = nfct_build_query(STATE(subsys_sync),
+			       NFCT_Q_CREATE,
+			       ct,
+			       nlh,
+			       sizeof(buf));
+
+	free(ct);
+
+	if (ret == -1) {
+		/* XXX: Please cleanup this debug crap, default in logfile */
+		debug("--- failed to build: %s --- \n", strerror(errno));
+		return 0;
+	}
+
+	ret = nfnl_query(STATE(sync), nlh);
+	if (ret == -1) {
+		switch(errno) {
+			case EEXIST:
+				c->commit_exist++;
+				break;
+			default:
+				c->commit_fail++;
+				break;
+		}
+		debug("--- failed to commit: %s --- \n", strerror(errno));
+	} else {
+		c->commit_ok++;
+		debug("----- commit -----\n");
+	}
+
+	/* keep iterating even if we have found errors */
+	return 0;
+}
+
+void cache_commit(struct cache *c)
+{
+	unsigned int commit_ok = c->commit_ok;
+	unsigned int commit_exist = c->commit_exist;
+	unsigned int commit_fail = c->commit_fail;
+
+	lock();
+	hashtable_iterate(c->h, c, do_commit);
+	unlock();
+
+	/* calculate new entries committed */
+	commit_ok = c->commit_ok - commit_ok;
+	commit_fail = c->commit_fail - commit_fail;
+	commit_exist = c->commit_exist - commit_exist;
+
+	/* log results */
+	dlog(STATE(log), "Committed %u new entries", commit_ok);
+
+	if (commit_exist)
+		dlog(STATE(log), "%u entries ignored, "
+				 "already exist", commit_exist);
+	if (commit_fail)
+		dlog(STATE(log), "%u entries can't be "
+				 "committed", commit_fail);
+}
+
+static int do_flush(void *data1, void *data2)
+{
+	struct cache *c = data1;
+	struct us_conntrack *u = data2;
+	void *data = u->data;
+	int i;
+
+	for (i = 0; i < c->num_features; i++) {
+		c->features[i]->destroy(u, data);
+		data += c->features[i]->size;
+	}
+	free(u->ct);
+
+	return 0;
+}
+
+void cache_flush(struct cache *c)
+{
+	lock();
+	hashtable_iterate(c->h, c, do_flush);
+	hashtable_flush(c->h);
+	c->flush++;
+	unlock();
+}
+
+#include "sync.h"
+#include "network.h"
+
+static int do_bulk(void *data1, void *data2)
+{
+	int ret;
+	struct us_conntrack *u = data2;
+	char buf[4096];
+	struct nlnetwork *net = (struct nlnetwork *) buf;
+
+	ret = build_network_msg(NFCT_Q_UPDATE,
+				STATE(subsys_sync),
+				u->ct,
+				buf,
+				sizeof(buf));
+	if (ret == -1)
+		debug_ct(u->ct, "failed to build");
+
+	mcast_send_netmsg(STATE_SYNC(mcast_client), net);
+	STATE_SYNC(mcast_sync)->post_send(net, u);
+
+	/* keep iterating even if we have found errors */
+	return 0;
+}
+
+void cache_bulk(struct cache *c)
+{
+	lock();
+	hashtable_iterate(c->h, NULL, do_bulk);
+	unlock();
+}