libp2p-tcp

js-libp2p-tcp

JavaScript implementation of the TCP module for libp2p. It exposes the interface-transport for dial/listen. libp2p-tcp is a very thin shim that adds support for dialing to a multiaddr. This small shim will enable libp2p to use other transports.

Lead Maintainer

Jacob Heun

Table of Contents

• Install
  • npm
• Usage
• API
• Contribute
• License

Install

npm

> npm install libp2p-tcp

Usage

const TCP = require('libp2p-tcp')
const multiaddr = require('multiaddr')
const pipe = require('it-pipe')
const { collect } = require('streaming-iterables')

// A simple upgrader that just returns the MultiaddrConnection
const upgrader = {
  upgradeInbound: maConn => maConn,
  upgradeOutbound: maConn => maConn
}

const tcp = new TCP({ upgrader })

const listener = tcp.createListener((socket) => {
  console.log('new connection opened')
  pipe(
    ['hello'],
    socket
  )
})

const addr = multiaddr('/ip4/127.0.0.1/tcp/9090')
await listener.listen(addr)
console.log('listening')

const socket = await tcp.dial(addr)
const values = await pipe(
  socket,
  collect
)
console.log(`Value: ${values.toString()}`)

// Close connection after reading
await listener.close()

Outputs:

listening
new connection opened
Value: hello

API

Transport

libp2p-tcp accepts TCP addresses as both IPFS and non IPFS encapsulated addresses, i.e:

/ip4/127.0.0.1/tcp/4001 /ip4/127.0.0.1/tcp/4001/ipfs/QmHash

(both for dialing and listening)

Connection

Contribute

Contributions are welcome! The libp2p implementation in JavaScript is a work in progress. As such, there's a few things you can do right now to help out:

• Check out the existing issues.
• Perform code reviews.
• Add tests. There can never be enough tests.

Please be aware that all interactions related to libp2p are subject to the IPFS Code of Conduct.

Small note: If editing the README, please conform to the standard-readme specification.

License

MIT © 2015-2016 David Dias

Changelog

0.14.5 (2020-04-28)

Bug Fixes

• catch error from maConn.close (#128) (0fe0815)

<a name="0.14.4"></a>