lightningd: support multiple addresses.

Currently only ipv4 and ipv6.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/jsonrpc.c

@@ -248,11 +248,13 @@ static void json_getinfo(struct command *cmd,
 
 	json_object_start(response, NULL);
 	json_add_pubkey(response, "id", &cmd->ld->id);
-	/* FIXME: Keep ipaddr and list them all. */
-	if (cmd->ld->portnum)
+	if (cmd->ld->portnum) {
 		json_add_num(response, "port", cmd->ld->portnum);
-	json_add_string(response, "network",
-			get_chainparams(cmd->ld)->network_name);
+		json_array_start(response, "address");
+		for (size_t i = 0; i < tal_count(cmd->ld->wireaddrs); i++)
+			json_add_address(response, NULL, cmd->ld->wireaddrs+i);
+		json_array_end(response);
+	}
 	json_add_string(response, "version", version());
 	json_add_num(response, "blockheight", get_block_height(cmd->ld->topology));
 	json_object_end(response);

lightningd/lightningd.c

@@ -79,6 +79,7 @@ static struct lightningd *new_lightningd(const tal_t *ctx,
 	ld->rgb = NULL;
 	list_head_init(&ld->pay_commands);
 	list_head_init(&ld->connects);
+	ld->wireaddrs = tal_arr(ld, struct ipaddr, 0);
 	ld->portnum = DEFAULT_PORT;
 	timers_init(&ld->timers, time_mono());
 	ld->topology = new_topology(ld, ld->log);

lightningd/lightningd.h

@@ -62,9 +62,6 @@ struct config {
 	/* How long between changing commit and sending COMMIT message. */
 	struct timerel commit_time;
 
-	/* IPv4 or IPv6 address to announce to the network */
-	struct ipaddr ipaddr;
-
 	/* Disable automatic reconnects */
 	bool no_reconnect;
 };
@@ -97,6 +94,9 @@ struct lightningd {
 	/* Port we're listening on */
 	u16 portnum;
 
+	/* Addresses to announce to the network (tal_count()) */
+	struct ipaddr *wireaddrs;
+
 	/* Bearer of all my secrets. */
 	int hsm_fd;
 

lightningd/options.c

@@ -118,7 +118,7 @@ static char *opt_set_s32(const char *arg, s32 *u)
 }
 
 /* FIXME: Rename ipaddr and hoist up */
-bool parse_ipaddr(const char *arg, struct ipaddr *addr)
+bool parse_ipaddr(const char *arg, struct ipaddr *addr, u16 port)
 {
 	struct in6_addr v6;
 	struct in_addr v4;
@@ -133,20 +133,26 @@ bool parse_ipaddr(const char *arg, struct ipaddr *addr)
 	if (inet_pton(AF_INET, arg, &v4) == 1) {
 		addr->type = ADDR_TYPE_IPV4;
 		addr->addrlen = 4;
+		addr->port = port;
 		memcpy(&addr->addr, &v4, addr->addrlen);
 		return true;
 	} else if (inet_pton(AF_INET6, arg, &v6) == 1) {
 		addr->type = ADDR_TYPE_IPV6;
 		addr->addrlen = 16;
+		addr->port = port;
 		memcpy(&addr->addr, &v6, addr->addrlen);
 		return true;
 	}
 	return false;
 }
 
-static char *opt_set_ipaddr(const char *arg, struct ipaddr *addr)
+static char *opt_add_ipaddr(const char *arg, struct lightningd *ld)
 {
-	if (parse_ipaddr(arg, addr))
+	size_t n = tal_count(ld->wireaddrs);
+
+	tal_resize(&ld->wireaddrs, n+1);
+
+	if (parse_ipaddr(arg, &ld->wireaddrs[n], ld->portnum))
 		return NULL;
 
 	return tal_fmt(NULL, "Unable to parse IP address '%s'", arg);
@@ -275,9 +281,9 @@ static void config_register_opts(struct lightningd *ld)
 	opt_register_noarg("--no-reconnect", opt_set_bool,
 			   &ld->config.no_reconnect, "Disable automatic reconnect attempts");
 
-	opt_register_arg("--ipaddr", opt_set_ipaddr, NULL,
-			   &ld->config.ipaddr,
-			   "Set the IP address (v4 or v6) to announce to the network for incoming connections");
+	opt_register_arg("--ipaddr", opt_add_ipaddr, NULL,
+			 ld,
+			 "Set the IP address (v4 or v6) to announce to the network for incoming connections");
 
 	opt_register_early_arg("--network", opt_set_network, opt_show_network,
 			       ld,
@@ -366,9 +372,6 @@ static const struct config testnet_config = {
 	/* Take 0.001% */
 	.fee_per_satoshi = 10,
 
-	/* Do not advertise any IP */
-	.ipaddr.type = 0,
-
 	/* Automatically reconnect */
 	.no_reconnect = false,
 };
@@ -427,9 +430,6 @@ static const struct config mainnet_config = {
 	/* Take 0.001% */
 	.fee_per_satoshi = 10,
 
-	/* Do not advertise any IP */
-	.ipaddr.type = 0,
-
 	/* Automatically reconnect */
 	.no_reconnect = false,
 };
@@ -631,7 +631,6 @@ bool handle_opts(struct lightningd *ld, int argc, char *argv[])
 	/* Now look for config file */
 	opt_parse_from_config(ld);
 
-	ld->config.ipaddr.port = ld->portnum;
 	opt_parse(&argc, argv, opt_log_stderr_exit);
 	if (argc != 1)
 		errx(1, "no arguments accepted");

lightningd/options.h

@@ -13,7 +13,7 @@ void register_opts(struct lightningd *ld);
  */
 bool handle_opts(struct lightningd *ld, int argc, char *argv[]);
 
-bool parse_ipaddr(const char *arg, struct ipaddr *addr);
+bool parse_ipaddr(const char *arg, struct ipaddr *addr, u16 port);
 
 /* Derive default color and alias from the pubkey. */
 void setup_color_and_alias(struct lightningd *ld);

lightningd/peer_control.c

@@ -741,7 +741,7 @@ static void json_connect(struct command *cmd,
 			port = tal_strdup(cmd, stringify(DEFAULT_PORT));
 		}
 		addr.port = atoi(port);
-		if (!parse_ipaddr(name, &addr) || !addr.port)
+		if (!parse_ipaddr(name, &addr, addr.port) || !addr.port)
 			command_fail(cmd, "host %s:%s not valid", name, port);
 
 		/* Tell it about the address. */
@@ -1472,13 +1472,14 @@ static u8 *create_node_announcement(const tal_t *ctx, struct lightningd *ld,
 	u8 *features = NULL;
 	u8 *addresses = tal_arr(ctx, u8, 0);
 	u8 *announcement;
+	size_t i;
 	if (!sig) {
 		sig = tal(ctx, secp256k1_ecdsa_signature);
 		memset(sig, 0, sizeof(*sig));
 	}
-	if (ld->config.ipaddr.type != ADDR_TYPE_PADDING) {
-		towire_ipaddr(&addresses, &ld->config.ipaddr);
-	}
+	for (i = 0; i < tal_count(ld->wireaddrs); i++)
+		towire_ipaddr(&addresses, ld->wireaddrs+i);
+
 	announcement =
 	    towire_node_announcement(ctx, sig, features, timestamp,
 				     &ld->id, ld->rgb, (u8 *)ld->alias,