--- fwsync/driver/fwsync_workers.c	2022/08/10 00:03:50	1.9
+++ fwsync/driver/fwsync_workers.c	2022/08/18 13:42:37	1.17
@@ -1,30 +1,32 @@
-/*************************************************************************
-* (C) 2022 CloudSigma AG - Sofia/Bulgaria
-*  by Michael Pounov <misho@elwix.org>
-**************************************************************************/
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2022 Michael Pounov <misho@elwix.org>, CloudSigma AG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
 #include "fwsync.h"
 
 
-static int
-fwsync_add_state_4(struct ipfw_flow_id *fid, u_int ruleid, u_short rulenum, 
-		u_short kidx, u_char cmdtype)
-{
-	struct ip_fw *rule = NULL;
-
-	DTRACE();
-
-	return ipfw_dyn_install_sync_state(fid, rule, ruleid, rulenum, kidx, cmdtype);
-}
-
-static int
-fwsync_add_state_6(struct ipfw_flow_id *fid, u_int ruleid, u_short rulenum, 
-		u_short kidx, u_char cmdtype)
-{
-	DTRACE();
-
-	return 0;
-}
-
 int
 fwsync_add_state(const struct fws_proto *pkt)
 {
@@ -51,8 +53,22 @@ fwsync_add_state(const struct fws_proto *pkt)
 int
 fwsync_add_alias(const struct fws_proto *pkt)
 {
+	struct fws_sndpkt *p;
+
 	DTRACE();
 
+	if (!pkt || pkt->fws_addrtype == 1)
+		return 0;	/* skip ethernet packet */
+
+	p = malloc(sizeof(struct fws_sndpkt), M_FWSYNC, M_NOWAIT | M_ZERO);
+	if (!p) {
+		return ENOMEM;
+	} else
+		memcpy(&p->sp_proto, pkt, sizeof(struct fws_proto));
+
+	mtx_lock(&fws_mtx_n);
+	TAILQ_INSERT_TAIL(&fwsync_natpkt, p, sp_next);
+	mtx_unlock(&fws_mtx_n);
 	return 0;
 }
 
@@ -228,6 +244,9 @@ fwsync_state_sync(const void *arg, const void *extdata
 {
 	struct fws_sndpkt *pkt;
 	struct ipfw_flow_id fid;
+	struct ip_fw *rule;
+	int f_pos;
+	struct ip_fw_chain *chain = &V_layer3_chain;
 
 	DTRACE();
 
@@ -266,12 +285,43 @@ fwsync_state_sync(const void *arg, const void *extdata
 			return EINVAL;
 	}
 
-	if (pkt->sp_proto.fws_addrtype == 4)
-		fwsync_add_state_4(&fid, pkt->sp_proto.fws_ruleid, pkt->sp_proto.fws_rulenum, 
-				pkt->sp_proto.fws_kidx, pkt->sp_proto.fws_cmdtype);
-	else if (pkt->sp_proto.fws_addrtype == 6)
-		fwsync_add_state_6(&fid, pkt->sp_proto.fws_ruleid, pkt->sp_proto.fws_rulenum, 
-				pkt->sp_proto.fws_kidx, pkt->sp_proto.fws_cmdtype);
+	f_pos = ipfw_find_rule(chain, pkt->sp_proto.fws_ruleid, pkt->sp_proto.fws_rulenum);
+	rule = chain->map[f_pos];
+	ipfw_dyn_install_sync_state(&fid, rule, 
+			pkt->sp_proto.fws_ruleid, pkt->sp_proto.fws_rulenum, 
+			pkt->sp_proto.fws_kidx, pkt->sp_proto.fws_cmdtype);
+
+	free(pkt, M_FWSYNC);
+	return 0;
+}
+
+int
+fwsync_alias_sync(const void *arg, const void *extdata)
+{
+	struct fws_sndpkt *pkt;
+	const struct cfg_nat *t = arg;
+
+	DTRACE();
+
+	mtx_lock(&fws_mtx_n);
+	pkt = TAILQ_FIRST(&fwsync_natpkt);
+	if (pkt)
+		TAILQ_REMOVE(&fwsync_natpkt, pkt, sp_next);
+	mtx_unlock(&fws_mtx_n);
+
+	if (!pkt)	/* update queue is empty */
+		return 0;
+
+	if (!(fws_cfg.cfg.on & CFG_SYNC_EDGE)) {
+		free(pkt, M_FWSYNC);
+		return EAGAIN;
+	}
+
+	LIBALIAS_LOCK(t->lib);
+	AddLink(t->lib, pkt->sp_proto.fws_saddr, pkt->sp_proto.fws_daddr, pkt->sp_proto.fws_aaddr, 
+			pkt->sp_proto.fws_sport, pkt->sp_proto.fws_dport, pkt->sp_proto.fws_aport, 
+			pkt->sp_proto.fws_linktype | LINK_SYNC_MASK);
+	LIBALIAS_UNLOCK(t->lib);
 
 	free(pkt, M_FWSYNC);
 	return 0;