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.
  See the License for the specific language governing permissions and
  limitations under the License.
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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="(optional) ip address of 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: 70px">
    </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="(optional) ip address of eth0">
    </div>
    <div class="form-row">
        <label for="node-input-outport"><i class="icon-random"></i> optional</label>
        output port <input type="text" id="node-input-outport"  style="width: 70px;" placeholder="not fixed">
    </div>
    <div class="form-row">
        <label>&nbsp;</label>
        <input type="checkbox" id="node-input-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:""},
            outport: {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>