Log who packets are going to/from, fix potential leak in previous commit

exec/broker.js

@@ -887,7 +887,7 @@ MQTT.Connection.prototype.send = function(pkt) {
 	if (this.tx_buf === '')
 		this.tx_once = this.sock.once('write', MQTT.Connection.txData);
 	this.tx_buf += pkt.serialize();
-	log(LOG_INFO, "Sending " + MQTT.typename[pkt.type] + ' packet.');
+	log(LOG_INFO, "Sending " + MQTT.typename[pkt.type] + ' packet to '+this.client_id);
 	return true;
 //for (var i = 0; i < data.length; i++)
 //log(LOG_INFO, format("Byte %u: %2$02x (%2$d)", i, ascii(data[i])));
@@ -1388,8 +1388,9 @@ MQTT.Connection.prototype.handlePacket = function() {
 			}
 		}
 		this['handle'+MQTT.typename[this.rx_packet.type]]();
-		if (this.sock !== null)
+		if (this.sock !== null) {
 			this.rx_once = this.sock.once('read', MQTT.Connection.rxPacket);
+		}
 		if (this.keep_alive > 0) {
 			this.keep_alive_timeout = js.setTimeout(MQTT.Connection.timeToDie, (this.keep_alive * 1000) * 1.5, this);
 			js.clearTimeout(this.keep_alive_timeout);
@@ -1897,7 +1898,7 @@ MQTT.Packet.gotTypeFlags = function(conn) {
 MQTT.Packet.parseRemaining = function(conn) {
 	conn.rx_callback = null;
 	conn.rx_need = 0;
-	log(LOG_INFO, "Got " + MQTT.typename[conn.rx_packet.type] + " packet.");
+	log(LOG_INFO, "Got " + MQTT.typename[conn.rx_packet.type] + " packet from "+conn.client_id);
 	js.setImmediate(conn.handlePacket, conn);
 };
 
@@ -1921,10 +1922,12 @@ MQTT.Packet.newBytes = function() {
 				return;
 			}
 		}
-		if (this.connection.rx_need)
+		if (this.connection.rx_need) {
 			this.connection.rx_once = this.once('read', MQTT.Packet.newBytes);
-		else
+		}
+		else if(this.connection.rx_once === null) {
 			this.connection.rx_once = this.once('read', MQTT.Connection.rxPacket);
+		}
 	}
 	catch (e) {
 		this.connection.error(e);