tcp-packetizer

TCP Packetizer
=========
This module is a helper to accumulate incoming bytes message from tcp sockets and return a packet by packet.

Install
---
``
npm install -s tcp-packetizer
`

Usage
---
this tcp-packetizer module helps to but tcp streaming message. There are two patterns it supports as fixed size packet or header & payload.

- Fixed Size packet
`
const packetizer = require('tcp-packetizer');

const server = net.createServer((socket) => {

// Create a packetizer with fixed size option
socket.packetizer = packetizer.create({
mode: packetizer.MODE_FIXED_PACKETSIZE,
packetSize: 100 // Mention your packet size
});

// redirect msg to packetizer
socket.on('data', (msg) => {
socket.packetizer.append(msg);
});

socket.packetizer.on('err', (err) => {
// Packet Error handling
});

socket.packetizer.on('packet', (packet) => {
// Single packet handling
});
})

`

- Header and Payload option
`
const packetizer = require('tcp-packetizer');

const server = net.createServer((socket) => {

// Create a packetizer with fixed size option
socket.packetizer = packetizer.create({
mode: packetizer.MODE_HEADER_PAYLOAD,
headerSize: 7, // Header length.
payloadSizeIndex: 5, // Payload size index in the header packet.
readDataLengthFn: Buffer.prototype.readUInt32LE // A way to read payload size, 8, 16, 32, 64 bytes and endianess.
});

// redirect msg to packetizer
socket.on('data', (msg) => {
socket.packetizer.append(msg);
});

socket.packetizer.on('err', (err) => {
// Packet Error handling
});

socket.packetizer.on('packet', (packet) => {
// Single packet handling
});
})

``