connectd: disable advertizement of WEBSOCKET addresses.

This seems to prevent broad propagation, due to LND not allowing it.  See
	lightningnetwork/lnd#6432

We still announce it if you disable deprecated-apis, so tests still work,
and hopefully we can enable it in future.

Fixes: #5196
Signed-off-by: Rusty Russell <[email protected]>
Changelog-EXPERIMENTAL: Protocol: disabled websocket announcement due to LND propagation issues

Author: rustyrussell

CHANGELOG.md

@@ -16,6 +16,7 @@ This release named by Simon Vrouwe; this marks the name change to core-lightning
 
  - Protocol: we now support opening multiple channels with the same peer. ([#5078])
  - Protocol: we send/receive IP addresses in `init`, and send updated node_announcement when two peers report the same remote_addr (`disable-ip-discovery` suppresses this announcement). ([#5052])
+ - Protocol: we more aggressively send our own gossip, to improve propagation chances. ([#5200])
  - Plugins: `cln-grpc` first class GRPC interface for remotely controlling nodes over mTLS authentication; set `grpc-port` to activate ([#5013])
  - Database: With the `sqlite3://` scheme for `--wallet` option, you can now specify a second file path for real-time database backup by separating it from the main file path with a `:` character. ([#4890])
  - Protocol: `pay` (and decode, etc) supports bolt11 payment_metadata a-la https://github.com/lightning/bolts/pull/912 ([#5086])
@@ -96,7 +97,7 @@ Note: You should always set `allow-deprecated-apis=false` to test for changes.
  - Fixed `experimental-websocket-port` to work with default addresses. ([#4945])
  - Protocol: removed support for v0.10.1 onion messages. ([#4921])
  - Protocol: Ability to announce DNS addresses ([#4829])
-
+ - Protocol: disabled websocket announcement due to LND propagation issues ([#5200])
 
 
 [#4829]: https://github.com/ElementsProject/lightning/pull/4829
@@ -141,6 +142,7 @@ Note: You should always set `allow-deprecated-apis=false` to test for changes.
 [#5130]: https://github.com/ElementsProject/lightning/pull/5130
 [#5136]: https://github.com/ElementsProject/lightning/pull/5136
 [#5146]: https://github.com/ElementsProject/lightning/pull/5146
+[#5200]: https://github.com/ElementsProject/lightning/pull/5200
 [0.11.0]: https://github.com/ElementsProject/lightning/releases/tag/v0.11.0
 
 ## [0.10.2] - 2021-11-03: Bitcoin Dust Consensus Rule

connectd/connectd.c

@@ -1397,10 +1397,15 @@ setup_listeners(const tal_t *ctx,
 				 *     different type.
 				 */
 				if (tal_count(*announceable) != 0) {
-					wireaddr_from_websocket(&addr.u.wireaddr,
-							daemon->websocket_port);
-					add_announceable(announceable,
-							&addr.u.wireaddr);
+					/* See https://github.com/lightningnetwork/lnd/issues/6432:
+					 * if we add websocket to the node_announcement, it doesn't propagate.
+					 * So we do not do this for now in general! */
+					if (daemon->announce_websocket) {
+						wireaddr_from_websocket(&addr.u.wireaddr,
+									daemon->websocket_port);
+						add_announceable(announceable,
+								 &addr.u.wireaddr);
+					}
 				} else {
 					status_unusual("Bound to websocket %s,"
 						       " but we cannot announce"
@@ -1535,6 +1540,7 @@ static void connect_init(struct daemon *daemon, const u8 *msg)
 		&daemon->timeout_secs,
 		&daemon->websocket_helper,
 		&daemon->websocket_port,
+		&daemon->announce_websocket,
 		&dev_fast_gossip,
 		&dev_disconnect,
 		&dev_no_ping_timer)) {

connectd/connectd.h

@@ -188,6 +188,9 @@ struct daemon {
 	int gossip_store_fd;
 	size_t gossip_store_end;
 
+	/* We only announce websocket addresses if !deprecated_apis */
+	bool announce_websocket;
+
 #if DEVELOPER
 	/* Hack to speed up gossip timer */
 	bool dev_fast_gossip;

connectd/connectd_wire.csv

@@ -22,6 +22,7 @@ msgdata,connectd_init,use_v3_autotor,bool,
 msgdata,connectd_init,timeout_secs,u32,
 msgdata,connectd_init,websocket_helper,wirestring,
 msgdata,connectd_init,websocket_port,u16,
+msgdata,connectd_init,announce_websocket,bool,
 msgdata,connectd_init,dev_fast_gossip,bool,
 # If this is set, then fd 5 is dev_disconnect_fd.
 msgdata,connectd_init,dev_disconnect,bool,

lightningd/connect_control.c

@@ -558,6 +558,7 @@ int connectd_init(struct lightningd *ld)
 	    ld->config.connection_timeout_secs,
 	    websocket_helper_path,
 	    ld->websocket_port,
+	    !deprecated_apis,
 	    IFDEV(ld->dev_fast_gossip, false),
 	    IFDEV(ld->dev_disconnect_fd >= 0, false),
 	    IFDEV(ld->dev_no_ping_timer, false));