connectd: don't received useless peer fd if we're told to send final …

…msg.

We don't need the connection to ourselves!

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

connectd/connectd.c

@@ -1812,21 +1812,10 @@ static void peer_final_msg(struct io_conn *conn,
 	struct peer *peer;
 	struct node_id id;
 	u8 *finalmsg;
-	int peer_fd;
 
 	if (!fromwire_connectd_peer_final_msg(tmpctx, msg, &id, &finalmsg))
 		master_badmsg(WIRE_CONNECTD_PEER_FINAL_MSG, msg);
 
-	/* Get the peer_fd for this peer: we don't need it though! */
-	io_fd_block(io_conn_fd(conn), true);
-	peer_fd = fdpass_recv(io_conn_fd(conn));
-	if (peer_fd == -1)
-		status_failed(STATUS_FAIL_MASTER_IO,
-			      "Getting peer fd after peer_final_msg: %s",
-			      strerror(errno));
-	close(peer_fd);
-	io_fd_block(io_conn_fd(conn), false);
-
 	/* This can happen if peer hung up on us. */
 	peer = peer_htable_get(&daemon->peers, &id);
 	if (peer) {

connectd/connectd_wire.csv

@@ -72,7 +72,7 @@ msgdata,connectd_peer_connected,features,u8,flen
 msgtype,connectd_peer_disconnected,2015
 msgdata,connectd_peer_disconnected,id,node_id,
 
-# master -> connectd: give message to peer and disconnect.  Plus fd for peer
+# master -> connectd: give message to peer and disconnect. 
 msgtype,connectd_peer_final_msg,2003
 msgdata,connectd_peer_final_msg,id,node_id,
 msgdata,connectd_peer_final_msg,len,u16,

lightningd/opening_common.c

@@ -194,7 +194,7 @@ void handle_reestablish(struct lightningd *ld,
 		subd_send_msg(ld->connectd,
 			      take(towire_connectd_peer_final_msg(NULL, peer_id,
 								  err)));
-		subd_send_fd(ld->connectd, peer_fd);
+		close(peer_fd);
 	}
 }
 

lightningd/peer_control.c

@@ -1057,7 +1057,7 @@ static void peer_connected_hook_final(struct peer_connected_hook_payload *payloa
 	subd_send_msg(ld->connectd,
 		      take(towire_connectd_peer_final_msg(NULL, &peer->id,
 							  error)));
-	subd_send_fd(ld->connectd, payload->peer_fd);
+	close(payload->peer_fd);
 }
 
 static bool