node-red/nodes/core/io/32-udp.html

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  Copyright 2013 IBM Corp.

  Licensed under the Apache License, Version 2.0 (the "License");
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  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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<!--  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.ip</b> and <b>msg.port</b> to the ip address and port from which the message was received.</b>
    <p>On some systems you may need to be root to use ports below 1024 and/or broadcast.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('udp in',{
        category: 'input',
        color:"Silver",
        defaults: {
            name: {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>
    <div class="form-tips">Tip: leave address and port blank if you want to set using <b>msg.ip</b> and <b>msg.port</b>.</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>You may also use <b>msg.ip</b> and <b>msg.port</b> to set the destination values.<br/><b>Note</b>: the statically configured values have precedence.</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 ports below 1024 and/or broadcast.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('udp out',{
        category: 'output',
        color:"Silver",
        defaults: {
            name: {value:""},
            addr: {value:""},
            iface: {value:""},
            port: {value:""},
            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>