/**
* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var dgram = require('dgram');
var udpInputPortsInUse = {};
// The Input Node
function UDPin(n) {
RED.nodes.createNode(this,n);
this.group = n.group;
this.port = n.port;
this.datatype = n.datatype;
this.iface = n.iface || null;
this.multicast = n.multicast;
this.ipv = n.ipv || "udp4";
var node = this;
var opts = {type:node.ipv, reuseAddr:true};
if (process.version.indexOf("v0.10") === 0) { opts = node.ipv; }
var server;
if (!udpInputPortsInUse.hasOwnProperty(this.port)) {
server = dgram.createSocket(opts); // default to udp4
udpInputPortsInUse[this.port] = server;
}
else {
node.warn(RED._("udp.errors.alreadyused",node.port));
server = udpInputPortsInUse[this.port]; // re-use existing
}
if (process.version.indexOf("v0.10") === 0) { opts = node.ipv; }
server.on("error", function (err) {
if ((err.code == "EACCES") && (node.port < 1024)) {
node.error(RED._("udp.errors.access-error"));
} else {
node.error(RED._("udp.errors.error",{error:err.code}));
}
server.close();
});
server.on('message', function (message, remote) {
var msg;
if (node.datatype =="base64") {
msg = { payload:message.toString('base64'), fromip:remote.address+':'+remote.port, ip:remote.address, port:remote.port };
} else if (node.datatype =="utf8") {
msg = { payload:message.toString('utf8'), fromip:remote.address+':'+remote.port, ip:remote.address, port:remote.port };
} else {
msg = { payload:message, fromip:remote.address+':'+remote.port, ip:remote.address, port:remote.port };
}
node.send(msg);
});
server.on('listening', function () {
var address = server.address();
node.log(RED._("udp.status.listener-at",{host:address.address,port:address.port}));
if (node.multicast == "true") {
server.setBroadcast(true);
try {
server.setMulticastTTL(128);
server.addMembership(node.group,node.iface);
node.log(RED._("udp.status.mc-group",{group:node.group}));
} catch (e) {
if (e.errno == "EINVAL") {
node.error(RED._("udp.errors.bad-mcaddress"));
} else if (e.errno == "ENODEV") {
node.error(RED._("udp.errors.interface"));
} else {
node.error(RED._("udp.errors.error",{error:e.errno}));
}
}
}
});
node.on("close", function() {
if (udpInputPortsInUse.hasOwnProperty(node.port)) {
delete udpInputPortsInUse[node.port];
}
try {
server.close();
node.log(RED._("udp.status.listener-stopped"));
} catch (err) {
//node.error(err);
}
});
try { server.bind(node.port,node.iface); }
catch(e) { } // Don't worry if already bound
}
RED.httpAdmin.get('/udp-ports/:id', RED.auth.needsPermission('udp-ports.read'), function(req,res) {
res.json(Object.keys(udpInputPortsInUse));
});
RED.nodes.registerType("udp in",UDPin);
// The Output Node
function UDPout(n) {
RED.nodes.createNode(this,n);
//this.group = n.group;
this.port = n.port;
this.outport = n.outport||"";
this.base64 = n.base64;
this.addr = n.addr;
this.iface = n.iface || null;
this.multicast = n.multicast;
this.ipv = n.ipv || "udp4";
var node = this;
var opts = {type:node.ipv, reuseAddr:true};
if (process.version.indexOf("v0.10") === 0) { opts = node.ipv; }
var sock;
if (udpInputPortsInUse[this.outport]) {
sock = udpInputPortsInUse[this.outport];
}
else {
sock = dgram.createSocket(opts); // default to udp4
sock.on("error", function(err) {
// Any async error will also get reported in the sock.send call.
// This handler is needed to ensure the error marked as handled to
// prevent it going to the global error handler and shutting node-red
// down.
});
udpInputPortsInUse[this.outport] = sock;
}
if (node.multicast != "false") {
if (node.outport === "") { node.outport = node.port; }
sock.bind(node.outport, function() { // have to bind before you can enable broadcast...
sock.setBroadcast(true); // turn on broadcast
if (node.multicast == "multi") {
try {
sock.setMulticastTTL(128);
sock.addMembership(node.addr,node.iface); // Add to the multicast group
node.log(RED._("udp.status.mc-ready",{outport:node.outport,host:node.addr,port:node.port}));
} catch (e) {
if (e.errno == "EINVAL") {
node.error(RED._("udp.errors.bad-mcaddress"));
} else if (e.errno == "ENODEV") {
node.error(RED._("udp.errors.interface"));
} else {
node.error(RED._("udp.errors.error",{error:e.errno}));
}
}
} else {
node.log(RED._("udp.status.bc-ready",{outport:node.outport,host:node.addr,port:node.port}));
}
});
} else if ((node.outport !== "") && (!udpInputPortsInUse[this.outport])) {
sock.bind(node.outport);
node.log(RED._("udp.status.ready",{outport:node.outport,host:node.addr,port:node.port}));
} else {
node.log(RED._("udp.status.ready-nolocal",{host:node.addr,port:node.port}));
}
node.on("input", function(msg) {
if (msg.hasOwnProperty("payload")) {
var add = node.addr || msg.ip || "";
var por = node.port || msg.port || 0;
if (add === "") {
node.warn(RED._("udp.errors.ip-notset"));
} else if (por === 0) {
node.warn(RED._("udp.errors.port-notset"));
} else if (isNaN(por) || (por < 1) || (por > 65535)) {
node.warn(RED._("udp.errors.port-invalid"));
} else {
var message;
if (node.base64) {
message = Buffer.from(msg.payload, 'base64');
} else if (msg.payload instanceof Buffer) {
message = msg.payload;
} else {
message = Buffer.from(""+msg.payload);
}
sock.send(message, 0, message.length, por, add, function(err, bytes) {
if (err) {
node.error("udp : "+err,msg);
}
message = null;
});
}
}
});
node.on("close", function() {
if (udpInputPortsInUse.hasOwnProperty(node.outport)) {
delete udpInputPortsInUse[node.outport];
}
try {
sock.close();
node.log(RED._("udp.status.output-stopped"));
} catch (err) {
//node.error(err);
}
});
}
RED.nodes.registerType("udp out",UDPout);
}