mirror of https://github.com/node-red/node-red.git
119 lines
3.1 KiB
JavaScript
119 lines
3.1 KiB
JavaScript
/**
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* Copyright 2013 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var RED = require("../../red/red");
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var dgram = require('dgram');
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// The Input Node
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function MCastIn(n) {
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RED.nodes.createNode(this,n);
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this.group = n.group;
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this.port = n.port;
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this.host = n.host || null;
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this.base64 = n.base64;
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this.iface = n.iface || null;
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this.multicast = n.multicast;
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var node = this;
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var server = dgram.createSocket('udp4');
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server.on("error", function (err) {
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console.log("udp listener error:\n" + err.stack);
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server.close();
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});
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server.on('message', function (message, remote) {
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var msg;
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if (node.base64) { msg = { payload:message.toString('base64'), fromip:remote.address+':'+remote.port }; }
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else { msg = { payload:message, fromip:remote.address+':'+remote.port }; }
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node.send(msg);
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});
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server.on('listening', function () {
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var address = server.address();
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node.log('udp listener at ' + address.address + ":" + address.port);
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if (node.multicast) {
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server.setBroadcast(true)
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server.setMulticastTTL(128);
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server.addMembership(node.group,node.iface);
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node.log("udp multicast group "+node.group);
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}
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});
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//server.bind(node.port,node.host);
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server.bind(node.port,node.host);
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this._close = function() {
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server.close();
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node.log('udp listener stopped');
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}
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}
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MCastIn.prototype.close = function() {
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this._close();
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}
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RED.nodes.registerType("multicast in",MCastIn);
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// The Output Node
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function MCastOut(n) {
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RED.nodes.createNode(this,n);
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this.group = n.group;
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this.port = n.port;
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this.host = n.host || null;
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this.base64 = n.base64;
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this.iface = n.iface || null;
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this.multicast = n.multicast;
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var node = this;
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var sock = dgram.createSocket('udp4'); // only use ipv4 for now
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sock.bind(node.port); // have to bind before you can enable broadcast...
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sock.setBroadcast(true); // turn on broadcast
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sock.setMulticastTTL(128);
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sock.addMembership(node.group,node.iface); // Add to the multicast group
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node.log('udp multicaster ready on '+node.group+":"+node.port);
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node.on("input", function(msg) {
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if (msg.payload != null) {
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console.log("MCast:",msg.payload);
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var message;
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if (node.base64) {
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message = new Buffer(msg.payload,'base64');
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}
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else {
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message = new Buffer(msg.payload);
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}
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sock.send(message, 0, message.length, node.port, node.group, function(err, bytes) {
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if (err) node.error("udp : "+err);
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//util.log('[socket out] udp :' +bytes);
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});
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}
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});
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this._close = function() {
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sock.close();
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node.log('udp multicaster stopped');
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}
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}
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RED.nodes.registerType("multicast out",MCastOut);
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MCastOut.prototype.close = function() {
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this._close();
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}
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