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mirror of https://github.com/node-red/node-red.git synced 2023-10-10 13:36:53 +02:00

New UDP node to go with updated TCP node - includes multicast support

This commit is contained in:
Dave C-J 2013-10-11 21:42:34 +01:00
parent ee92967efa
commit 9741c36fdb
2 changed files with 291 additions and 0 deletions

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<!--
Copyright 2013 IBM Corp.
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.
-->
<!-- The Input Node -->
<script type="text/x-red" data-template-name="udp in">
<div class="form-row">
<label for="node-input-port"><i class="icon-inbox"></i> Listen</label>
on port <input type="text" id="node-input-port" placeholder="Port" style="width: 45px">
for <select id="node-input-multicast" style='width:40%'>
<option value="false">udp messages</option>
<option value="true">multicast messages</option>
</select>
</div>
<div class="form-row node-input-group">
<label for="node-input-group"><i class="icon-list"></i> Group</label>
<input type="text" id="node-input-group" placeholder="225.0.18.83">
</div>
<div class="form-row node-input-iface">
<label for="node-input-iface"><i class="icon-random"></i> Interface</label>
<input type="text" id="node-input-iface" placeholder="eth0">
</div>
<div class="form-row">
<label for="node-input-datatype"><i class="icon-file"></i> Output</label>
<select id="node-input-datatype" style="width: 70%;">
<option value="buffer">a Buffer</option>
<option value="utf8">a String</option>
<option value="base64">a Base64 encoded string</option>
</select>
</div>
<div class="form-row">
<label for="node-input-name"><i class="icon-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
<div class="form-tips">Tip: Make sure your firewall will allow the data in.</div>
<script>
$("#node-input-multicast").change(function() {
var id = $("#node-input-multicast option:selected").val();
if (id == "false") {
$(".node-input-group").hide();
$(".node-input-iface").hide();
}
else {
$(".node-input-group").show();
$(".node-input-iface").show();
}
});
</script>
</script>
<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>
</script>
<script type="text/javascript">
RED.nodes.registerType('udp in',{
category: 'input',
color:"Silver",
defaults: {
name: {value:""},
host: {value:""},
iface: {value:""},
port: {value:"",required:true,validate:RED.validators.number()},
datatype: {value:"buffer",required:true},
multicast: {value:"false"},
group: {value:"",validate:function(v) { return (this.multicast !== "true")||v.length > 0;} }
},
inputs:0,
outputs:1,
icon: "bridge-dash.png",
label: function() {
if (this.multicast=="false") {
return this.name||"udp "+this.port;
}
else return this.name||"udp "+(this.group+":"+this.port);
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>
<!-- The Output Node -->
<script type="text/x-red" data-template-name="udp out">
<div class="form-row">
<label for="node-input-port"><i class="icon-envelope"></i> Send a</label>
<select id="node-input-multicast" style='width:40%'>
<option value="false">udp message</option>
<option value="broad">broadcast message</option>
<option value="multi">multicast message</option>
</select>
to port <input type="text" id="node-input-port" placeholder="Port" style="width: 45px">
</div>
<div class="form-row node-input-addr">
<label for="node-input-addr" id="node-input-addr-label"><i class="icon-list"></i> Address</label>
<input type="text" id="node-input-addr" placeholder="destination ip" style="width: 70%;">
</div>
<div class="form-row node-input-iface">
<label for="node-input-iface"><i class="icon-random"></i> Interface</label>
<input type="text" id="node-input-iface" placeholder="eth0">
</div>
<div class="form-row">
<label>&nbsp;</label>
<input type="checkbox" id="node-input-base64" placeholder="base64" style="display: inline-block; width: auto; vertical-align: top;">
<label for="node-input-base64" style="width: 70%;">Decode Base64 encoded payload ?</label>
</div>
<div class="form-row">
<label for="node-input-name"><i class="icon-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
<script>
$("#node-input-multicast").change(function() {
var id = $("#node-input-multicast option:selected").val();
console.log(id,$("#node-input-addr")[0].placeholder);
if (id !== "multi") {
$(".node-input-iface").hide();
$("#node-input-addr-label").html('<i class="icon-list"></i> Address');
$("#node-input-addr")[0].placeholder = 'destination ip';
}
else {
$(".node-input-iface").show();
$("#node-input-addr-label").html('<i class="icon-list"></i> Group');
$("#node-input-addr")[0].placeholder = '225.0.18.83';
}
if (id === "broad") {
$("#node-input-addr")[0].placeholder = '255.255.255.255';
}
});
</script>
</script>
<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>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>
</script>
<script type="text/javascript">
RED.nodes.registerType('udp out',{
category: 'output',
color:"Silver",
defaults: {
name: {value:""},
addr: {value:"",required:true},
//group: {value:""},
iface: {value:""},
port: {value:"",required:true,validate:RED.validators.number()},
base64: {value:false,required:true},
multicast: {value:"false"}
},
inputs:1,
outputs:0,
icon: "bridge-dash.png",
align: "right",
label: function() {
return this.name||"udp "+(this.addr+":"+this.port);
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>

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/**
* Copyright 2013 IBM Corp.
*
* 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.
**/
var RED = require("../../red/red");
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;
var server = dgram.createSocket('udp4');
server.on("error", function (err) {
console.log("udp listener error:\n" + err.stack);
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('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); }
});
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;
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("close", function() {
try {
sock.close();
node.log('udp output stopped');
}
catch (err) { console.log(err); }
});
}
RED.nodes.registerType("udp out",UDPout);