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Partial fix for Issue #45 - allows msg.destip and msg.port properties to override static config. 

Signed-off-by: Dave C-J <dave@conway-jones.co.uk>
This commit is contained in:
Dave C-J 2013-10-24 19:58:57 +01:00
parent f1f00da1a8
commit a4160a6bea
2 changed files with 84 additions and 78 deletions
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4
nodes/io/32-udp.html
View File

@ -63,6 +63,7 @@
<script type="text/x-red" data-help-name="udp in">
<p>A udp input node, that produces a <b>msg.payload</b> containing a <i>BUFFER</i>, string, or base64 encoded string. Supports multicast.</p>
<p>It also provides <b>msg.fromip</b> in the form ipaddress:port .</p>
<p>On some systems you may need to be root to use ports below 1024 and/or broadcast.</p>
</script>
<script type="text/javascript">
@ -145,8 +146,9 @@
<script type="text/x-red" data-help-name="udp out">
<p>This node sends <b>msg.payload</b> to the designated udp host and port. Supports multicast.</p>
<p>You may also use <b>msg.destip</b> and <b>msg.port</b> to override the values manually configured.</p>
<p>If you select broadcast either set the address to the local broadcast ip address, or maybe try 255.255.255.255, which is the global broadcast address.</p>
<p>On some systems you may need to be root to use broadcast.</p>
<p>On some systems you may need to be root to use ports below 1024 and/or broadcast.</p>
</script>
<script type="text/javascript">

158
nodes/io/32-udp.js
View File

@ -19,97 +19,101 @@ var dgram = require('dgram');
// The Input Node
function UDPin(n) {
RED.nodes.createNode(this,n);
this.group = n.group;
this.port = n.port;
this.host = n.host || null;
this.datatype = n.datatype;
this.iface = n.iface || null;
this.multicast = n.multicast;
var node = this;
RED.nodes.createNode(this,n);
this.group = n.group;
this.port = n.port;
this.host = n.host || null;
this.datatype = n.datatype;
this.iface = n.iface || null;
this.multicast = n.multicast;
var node = this;
var server = dgram.createSocket('udp4');
var server = dgram.createSocket('udp4');
server.on("error", function (err) {
console.log("udp listener error:\n" + err.stack);
server.close();
});
server.on("error", function (err) {
//console.log("udp listener error:\n" + err.stack);
if ((err.code == "EACCES") && (node.port < 1024)) { node.error("UDP access error, you may need root access for ports below 1024"); }
else { node.error("UDP 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 }; }
else if (node.datatype =="utf8") { msg = { payload:message.toString('utf8'), fromip:remote.address+':'+remote.port }; }
else { msg = { payload:message, fromip:remote.address+':'+remote.port }; }
node.send(msg);
});
server.on('message', function (message, remote) {
var msg;
if (node.datatype =="base64") { msg = { payload:message.toString('base64'), fromip:remote.address+':'+remote.port }; }
else if (node.datatype =="utf8") { msg = { payload:message.toString('utf8'), fromip:remote.address+':'+remote.port }; }
else { msg = { payload:message, fromip:remote.address+':'+remote.port }; }
node.send(msg);
});
server.on('listening', function () {
var address = server.address();
node.log('udp listener at ' + address.address + ":" + address.port);
if (node.multicast == "true") {
server.setBroadcast(true)
server.setMulticastTTL(128);
server.addMembership(node.group,node.iface);
node.log("udp multicast group "+node.group);
}
});
server.on('listening', function () {
var address = server.address();
node.log('udp listener at ' + address.address + ":" + address.port);
if (node.multicast == "true") {
server.setBroadcast(true)
server.setMulticastTTL(128);
server.addMembership(node.group,node.iface);
node.log("udp multicast group "+node.group);
}
});
node.on("close", function() {
try {
server.close();
node.log('udp listener stopped');
}
catch (err) { console.log(err); }
});
node.on("close", function() {
try {
server.close();
node.log('udp listener stopped');
}
catch (err) { console.log(err); }
});
server.bind(node.port,node.host);
server.bind(node.port,node.host);
}
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.base64 = n.base64;
this.addr = n.addr;
this.iface = n.iface || null;
this.multicast = n.multicast;
var node = this;
RED.nodes.createNode(this,n);
//this.group = n.group;
this.port = n.port;
this.base64 = n.base64;
this.addr = n.addr;
this.iface = n.iface || null;
this.multicast = n.multicast;
var node = this;
var sock = dgram.createSocket('udp4'); // only use ipv4 for now
sock.bind(node.port); // have to bind before you can enable broadcast...
if (this.multicast != "false") {
sock.setBroadcast(true); // turn on broadcast
if (this.multicast == "multi") {
sock.setMulticastTTL(128);
sock.addMembership(node.addr,node.iface); // Add to the multicast group
node.log('udp multicast ready : '+node.addr+":"+node.port);
}
else node.log('udp broadcast ready : '+node.addr+":"+node.port);
}
else node.log('udp ready : '+node.addr+":"+node.port);
var sock = dgram.createSocket('udp4'); // only use ipv4 for now
sock.bind(node.port); // have to bind before you can enable broadcast...
if (this.multicast != "false") {
sock.setBroadcast(true); // turn on broadcast
if (this.multicast == "multi") {
sock.setMulticastTTL(128);
sock.addMembership(node.addr,node.iface); // Add to the multicast group
node.log('udp multicast ready : '+node.addr+":"+node.port);
}
else node.log('udp broadcast ready : '+node.addr+":"+node.port);
}
else node.log('udp ready : '+node.addr+":"+node.port);
node.on("input", function(msg) {
if (msg.payload != null) {
//console.log("UDP:",msg.payload);
var message;
if (node.base64) { message = new Buffer(b64string, 'base64'); }
else { message = new Buffer(""+msg.payload); }
console.log("UDP send :",node.addr,node.port);
sock.send(message, 0, message.length, node.port, node.addr, function(err, bytes) {
if (err) node.error("udp : "+err);
});
}
});
node.on("input", function(msg) {
if (msg.payload != null) {
//console.log("UDP:",msg.payload);
var add = msg.destip || node.addr;
var por = msg.port || node.addr;
var message;
if (node.base64) { message = new Buffer(b64string, 'base64'); }
else { message = new Buffer(""+msg.payload); }
//console.log("UDP send :",add,por);
sock.send(message, 0, message.length, por, add, function(err, bytes) {
if (err) node.error("udp : "+err);
});
}
});
node.on("close", function() {
try {
sock.close();
node.log('udp output stopped');
}
catch (err) { console.log(err); }
});
node.on("close", function() {
try {
sock.close();
node.log('udp output stopped');
}
catch (err) { console.log(err); }
});
}
RED.nodes.registerType("udp out",UDPout);