lightningd: make explicit listen and reconnect flags.

We set no_reconnect with --offline, but that doesn't work if !DEVELOPER.
Make the flag positive, and non-DEVELOPER mode for gossipd.

We also don't override portnum with --offline, but have an explicit
'listen' flag.

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

gossipd/gossip.c

@@ -132,8 +132,8 @@ struct daemon {
 	/* To make sure our node_announcement timestamps increase */
 	u32 last_announce_timestamp;
 
-	/* Only matters if DEVELOPER defined */
-	bool no_reconnect;
+	/* Automatically reconnect. */
+	bool reconnect;
 };
 
 /* Peers we're trying to reach. */
@@ -1631,7 +1631,7 @@ static struct io_plan *gossip_init(struct daemon_conn *master,
 		daemon, msg, &daemon->broadcast_interval, &chain_hash,
 		&daemon->id, &daemon->globalfeatures,
 		&daemon->localfeatures, &daemon->wireaddrs, daemon->rgb,
-		daemon->alias, &update_channel_interval, &daemon->no_reconnect)) {
+		daemon->alias, &update_channel_interval, &daemon->reconnect)) {
 		master_badmsg(WIRE_GOSSIPCTL_INIT, msg);
 	}
 	/* Prune time is twice update time */
@@ -1955,12 +1955,11 @@ static void retry_important(struct important_peerid *imp)
 	/* In case we've come off a timer, don't leave dangling pointer */
 	imp->reconnect_timer = NULL;
 
-#if DEVELOPER
-	/* With --dev-no-reconnect, we only want explicit
+	/* With --dev-no-reconnect or --offline, we only want explicit
 	 * connects */
-	if (imp->daemon->no_reconnect)
+	if (!imp->daemon->reconnect)
 		return;
-#endif
+
 	try_reach_peer(imp->daemon, &imp->id, false);
 }
 

gossipd/gossip_wire.csv

@@ -16,8 +16,7 @@ gossipctl_init,,wireaddrs,num_wireaddrs*struct wireaddr
 gossipctl_init,,rgb,3*u8
 gossipctl_init,,alias,32*u8
 gossipctl_init,,update_channel_interval,u32
-# DEVELOPER only
-gossipctl_init,,no_reconnect,bool
+gossipctl_init,,reconnect,bool
 
 # Activate the gossip daemon, so others can connect.
 gossipctl_activate,3025

lightningd/gossip_control.c

@@ -183,11 +183,6 @@ void gossip_init(struct lightningd *ld)
 	u8 *msg;
 	int hsmfd;
 	u64 capabilities = HSM_CAP_ECDH | HSM_CAP_SIGN_GOSSIP;
-#if DEVELOPER
-	bool no_reconnect = ld->no_reconnect;
-#else
-	bool no_reconnect = false;
-#endif
 
 	msg = towire_hsm_client_hsmfd(tmpctx, &ld->id, capabilities);
 	if (!wire_sync_write(ld->hsm_fd, msg))
@@ -212,7 +207,7 @@ void gossip_init(struct lightningd *ld)
 	    &get_chainparams(ld)->genesis_blockhash, &ld->id,
 	    get_offered_global_features(tmpctx),
 	    get_offered_local_features(tmpctx), ld->wireaddrs, ld->rgb,
-	    ld->alias, ld->config.channel_update_interval, no_reconnect);
+	    ld->alias, ld->config.channel_update_interval, ld->reconnect);
 	subd_send_msg(ld->gossip, msg);
 }
 
@@ -227,7 +222,8 @@ static void gossip_activate_done(struct subd *gossip UNUSED,
 
 void gossip_activate(struct lightningd *ld)
 {
-	const u8 *msg = towire_gossipctl_activate(NULL, ld->portnum);
+	const u8 *msg = towire_gossipctl_activate(NULL,
+						  ld->listen ? ld->portnum : 0);
 	subd_req(ld->gossip, ld->gossip, take(msg), -1, 0,
 		 gossip_activate_done, NULL);
 

lightningd/jsonrpc.c

@@ -149,7 +149,7 @@ static void json_getinfo(struct command *cmd,
 
 	json_object_start(response, NULL);
 	json_add_pubkey(response, "id", &cmd->ld->id);
-	if (cmd->ld->portnum) {
+	if (cmd->ld->listen && cmd->ld->portnum) {
 		json_add_num(response, "port", cmd->ld->portnum);
 		json_array_start(response, "address");
 		for (size_t i = 0; i < tal_count(cmd->ld->wireaddrs); i++)

lightningd/lightningd.c

@@ -51,7 +51,6 @@ static struct lightningd *new_lightningd(const tal_t *ctx)
 	ld->dev_debug_subdaemon = NULL;
 	ld->dev_disconnect_fd = -1;
 	ld->dev_subdaemon_fail = false;
-	ld->no_reconnect = false;
 
 	if (getenv("LIGHTNINGD_DEV_MEMLEAK"))
 		memleak_init(ld, backtrace_state);
@@ -72,6 +71,8 @@ static struct lightningd *new_lightningd(const tal_t *ctx)
 	list_head_init(&ld->close_commands);
 	ld->wireaddrs = tal_arr(ld, struct wireaddr, 0);
 	ld->portnum = DEFAULT_PORT;
+	ld->listen = true;
+	ld->reconnect = true;
 	timers_init(&ld->timers, time_mono());
 	ld->topology = new_topology(ld, ld->log);
 	ld->debug_subdaemon_io = NULL;

lightningd/lightningd.h

@@ -111,6 +111,12 @@ struct lightningd {
 	/* Port we're listening on */
 	u16 portnum;
 
+	/* Do we want to reconnect to other peers? */
+	bool reconnect;
+
+	/* Do we want to listen for other peers? */
+	bool listen;
+
 	/* Addresses to announce to the network (tal_count()) */
 	struct wireaddr *wireaddrs;
 
@@ -160,9 +166,6 @@ struct lightningd {
 	/* May be useful for non-developers debugging in the field */
 	char *debug_subdaemon_io;
 
-	/* Disable automatic reconnects */
-	bool no_reconnect;
-
 	/* Initial autocleaninvoice settings. */
 	u64 ini_autocleaninvoice_cycle;
 	u64 ini_autocleaninvoice_expiredby;

lightningd/opening_control.c

@@ -257,13 +257,6 @@ void tell_gossipd_peer_is_important(struct lightningd *ld,
 {
 	u8 *msg;
 
-#if DEVELOPER
-	/* Don't schedule an attempt if we disabled reconnections with
-	 * the `--dev-no-reconnect` flag */
-	if (ld->no_reconnect)
-		return;
-#endif /* DEVELOPER */
-
 	/* Tell gossipd we need to keep connection to this peer */
 	msg = towire_gossipctl_peer_important(NULL, &channel->peer->id, true);
 	subd_send_msg(ld->gossip, take(msg));

lightningd/options.c

@@ -259,8 +259,9 @@ static char *opt_set_fee_rates(const char *arg, struct chain_topology *topo)
 
 static char *opt_set_offline(struct lightningd *ld)
 {
-	ld->portnum = 0;
-	ld->no_reconnect = true;
+	ld->reconnect = false;
+	ld->listen = false;
+
 	return NULL;
 }
 
@@ -360,8 +361,8 @@ static void config_register_opts(struct lightningd *ld)
 #if DEVELOPER
 static void dev_register_opts(struct lightningd *ld)
 {
-	opt_register_noarg("--dev-no-reconnect", opt_set_bool,
-			   &ld->no_reconnect,
+	opt_register_noarg("--dev-no-reconnect", opt_set_invbool,
+			   &ld->reconnect,
 			   "Disable automatic reconnect attempts");
 	opt_register_noarg("--dev-fail-on-subdaemon-fail", opt_set_bool,
 			   &ld->dev_subdaemon_fail, opt_hidden);
@@ -767,11 +768,11 @@ void handle_opts(struct lightningd *ld, int argc, char *argv[])
 
 	check_config(ld);
 
-	if (ld->portnum && tal_count(ld->wireaddrs) == 0)
+	if (ld->portnum && ld->listen && tal_count(ld->wireaddrs) == 0)
 		guess_addresses(ld);
 	else
 		log_debug(ld->log, "Not guessing addresses: %s",
-			  ld->portnum ? "manually set" : "port set to zero");
+			  (ld->portnum && ld->listen) ? "manually set" : "port set to zero");
 }
 
 /* FIXME: This is a hack!  Expose somehow in ccan/opt.*/
@@ -804,12 +805,18 @@ static void add_config(struct lightningd *ld,
 		    /* These two show up as --network= */
 		    || opt->cb == (void *)opt_set_testnet
 		    || opt->cb == (void *)opt_set_mainnet
-		    || opt->cb == (void *)opt_set_offline /* will show up as port=0 and --no-reconnect */
 		    || opt->cb == (void *)test_daemons_and_exit) {
 			/* These are not important */
 		} else if (opt->cb == (void *)opt_set_bool) {
 			const bool *b = opt->u.carg;
 			answer = tal_fmt(name0, "%s", *b ? "true" : "false");
+		} else if (opt->cb == (void *)opt_set_invbool) {
+			const bool *b = opt->u.carg;
+			answer = tal_fmt(name0, "%s", !*b ? "true" : "false");
+		} else if (opt->cb == (void *)opt_set_offline) {
+			answer = tal_fmt(name0, "%s",
+					 (!ld->reconnect && !ld->listen)
+					 ? "true" : "false");
 		} else {
 			/* Insert more decodes here! */
 			abort();