node's dgram for react-native
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Latest commit 8ade57d Dec 8, 2017

UDP in React Native

node's dgram API in React Native

This module is used by Tradle


npm install --save react-native-udp

Link in the native dependency

react-native link react-native-udp
# OR, if you're using react-native older than 0.31:
rnpm link react-native-udp


  • Register and load the Native Module in your Main application (import, getPackages)
    • Note: prior to react-native 0.29.2, this should happen in your Main Activity

import com.tradle.react.UdpSocketsModule;			// <--- import //

public class MainApplication extends Application implements ReactApplication {
	protected List<ReactPackage> getPackages() {
		return Arrays.<ReactPackage>asList(
			new MainReactPackage(),
			new UdpSocketsModule()				// <- add here //

Buckle up, Dorothy



only if you want to write require('dgram') in your javascript

  "browser": {
    "dgram": "react-native-udp"


see/run index.js for a complete example, but basically it's just like dgram

var dgram = require('dgram')
// OR, if not shimming via package.json "browser" field:
// var dgram = require('react-native-udp')
var socket = dgram.createSocket('udp4')
socket.once('listening', function() {
  var buf = toByteArray('excellent!')
  socket.send(buf, 0, buf.length, remotePort, remoteHost, function(err) {
    if (err) throw err

    console.log('message was sent')

socket.on('message', function(msg, rinfo) {
  console.log('message was received', msg)


If you want to send and receive node Buffer objects, you'll have to "npm install buffer" and set it as a global for UdpSockets to pick it up:

global.Buffer = global.Buffer || require('buffer').Buffer


add select tests from node's tests for dgram


Mark Vayngrib
Ellen Katsnelson
Tradle, Inc.

Andy Prock

PR's welcome!