--- fwsync/patches/sync.c	2022/06/22 13:01:55	1.1
+++ fwsync/patches/sync.c	2022/08/26 14:40:53	1.3.2.1
@@ -1,16 +1,29 @@
 /*-
- * Copyright (c) 2022 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 forms, with and without modification,
- * are permitted provided that this entire comment appears intact.
+ * 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.
  *
- * Redistribution in binary form may occur without any restrictions.
- * Obviously, it would be nice if you gave credit where credit is due
- * but requiring it would be too onerous.
+ * 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.
  *
- * This software is provided ``AS IS'' without any warranties of any kind.
- *
  * command line interface for sync state of IP firewall
  */
 #include <stdio.h>
@@ -104,7 +117,7 @@ ipfw_config_sync(int ac, char **av)
 				if (inet_pton(AF_INET6, host, &cfg->addr[0].ip6.sin6_addr) != 1)
 					errx(EX_DATAERR, "invalid edge IPv6 address\n");
 		}
-	} else if (!strcmp(*av, "collector")) {
+	} else if (ac && !strcmp(*av, "collector")) {
 		SYNC_SHIFT_ARG;
 		if (!ac)
 			errx(EX_DATAERR, "missing destination(s) address[,port]\n");
@@ -196,6 +209,46 @@ ipfw_config_sync(int ac, char **av)
 	}
 
 	free(buf);
+}
+
+void
+ipfw_list_sync(int ac, char **av)
+{
+	ipfw_obj_header *oh;
+	struct ipfw_sync_cfg *cfg;
+	size_t sz;
+
+	SYNC_SHIFT_ARG;
+
+	sz = sizeof *oh + sizeof *cfg;
+	while (42) {
+		if (!(oh = malloc(sz)))
+			return;
+		else
+			memset(oh, 0, sz);
+		cfg = (struct ipfw_sync_cfg*) (oh + 1);
+		oh->ntlv.head.length = sizeof(oh->ntlv);
+		strlcpy(oh->ntlv.name, ac ? *av : "", sizeof(oh->ntlv.name));
+		strlcpy(cfg->name, ac ? *av : "", sizeof(cfg->name));
+
+		if (do_get3(IP_FW_SYNC_LIST, &oh->opheader, &sz)) {
+			free(oh);
+			if (errno == ENOMEM)
+				continue;
+			return;
+		}
+
+		break;
+	}
+
+	if (!ac || !strcmp(*av, "edge"))
+		printf("sync edge states %lu aliases %lu\n", 
+				*(uint64_t*) (cfg->addr[0].ip6.sin6_addr.s6_addr + 8), 
+				*(uint64_t*) (cfg->addr[1].ip6.sin6_addr.s6_addr + 8));
+	if (!ac || !strcmp(*av, "collector"))
+		printf("sync collector states %lu aliases %lu\n", 
+				*(uint64_t*) cfg->addr[0].ip6.sin6_addr.s6_addr, 
+				*(uint64_t*) cfg->addr[1].ip6.sin6_addr.s6_addr);
 }
 
 void