@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.

Table of Contents

• Install
  • npm
• Usage
• API
  • Transport
  • Connection
• Contribute
• Contribute
• License
  • Contribution

Install

npm

> npm install @libp2p/tcp

Usage

import { TCP } from '@libp2p/tcp'
import { multiaddr } from '@multiformats/multiaddr'
import {pipe} from 'it-pipe'
import all from 'it-all'

// 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({
  handler: (socket) => {
    console.log('new connection opened')
    pipe(
      ['hello', ' ', 'World!'],
      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,
  all
)
console.log(`Value: ${values.toString()}`)

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

Outputs:

listening
new connection opened
Value: hello World!

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.

Contribute

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

• Go through the modules and check out existing issues. This is especially useful for modules in active development. Some knowledge of IPFS/libp2p may be required, as well as the infrastructure behind it - for instance, you may need to read up on p2p and more complex operations like muxing to be able to help technically.
• Perform code reviews. More eyes will help a) speed the project along b) ensure quality and c) reduce possible future bugs.

License

Licensed under either of

• Apache 2.0, (LICENSE-APACHE / http://www.apache.org/licenses/LICENSE-2.0)
• MIT (LICENSE-MIT / http://opensource.org/licenses/MIT)

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.