This repository has been archived by the owner on Aug 23, 2019. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 37
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat(dial): exposing connection handle flow
- Loading branch information
Showing
4 changed files
with
169 additions
and
153 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| 'use strict' | ||
|
|
||
| const multistream = require('multistream-select') | ||
| const protocolMuxer = require('./protocol-muxer') | ||
|
|
||
| const debug = require('debug') | ||
| const log = debug('libp2p:swarm:handle') | ||
|
|
||
| module.exports = function process (swarm) { | ||
| return (pi, protocol, proxyConn) => { | ||
| const b58Id = pi.id.toB58String() | ||
|
|
||
| function cryptoDial (conn, cb) { | ||
| const ms = new multistream.Dialer() | ||
| ms.handle(conn, (err) => { | ||
| if (err) { | ||
| return cb(err) | ||
| } | ||
|
|
||
| const id = swarm._peerInfo.id | ||
| log('selecting crypto: %s', swarm.crypto.tag) | ||
| ms.select(swarm.crypto.tag, (err, conn) => { | ||
| if (err) { | ||
| return cb(err) | ||
| } | ||
|
|
||
| const wrapped = swarm.crypto.encrypt(id, id.privKey, conn) | ||
| cb(null, wrapped) | ||
| }) | ||
| }) | ||
| } | ||
|
|
||
| function gotWarmedUpConn (conn, cb) { | ||
| conn.setPeerInfo(pi) | ||
| attemptMuxerUpgrade(conn, (err, muxer) => { | ||
| if (!protocol) { | ||
| if (err) { | ||
| swarm.conns[b58Id] = conn | ||
| } | ||
| return cb() | ||
| } | ||
|
|
||
| if (err) { | ||
| // couldn't upgrade to Muxer, it is ok | ||
| protocolHandshake(conn, protocol, cb) | ||
| } else { | ||
| gotMuxer(muxer, cb) | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| function attemptMuxerUpgrade (conn, cb) { | ||
| const muxers = Object.keys(swarm.muxers) | ||
| if (muxers.length === 0) { | ||
| return cb(new Error('no muxers available')) | ||
| } | ||
|
|
||
| // 1. try to handshake in one of the muxers available | ||
| // 2. if succeeds | ||
| // - add the muxedConn to the list of muxedConns | ||
| // - add incomming new streams to connHandler | ||
|
|
||
| const ms = new multistream.Dialer() | ||
| ms.handle(conn, (err) => { | ||
| if (err) { | ||
| return cb(new Error('multistream not supported')) | ||
| } | ||
|
|
||
| nextMuxer(muxers.shift()) | ||
| }) | ||
|
|
||
| function nextMuxer (key) { | ||
| log('selecting %s', key) | ||
| ms.select(key, (err, conn) => { | ||
| if (err) { | ||
| if (muxers.length === 0) { | ||
| cb(new Error('could not upgrade to stream muxing')) | ||
| } else { | ||
| nextMuxer(muxers.shift()) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| const muxedConn = swarm.muxers[key].dialer(conn) | ||
| swarm.muxedConns[b58Id] = {} | ||
| swarm.muxedConns[b58Id].muxer = muxedConn | ||
| // should not be needed anymore - swarm.muxedConns[b58Id].conn = conn | ||
|
|
||
| swarm.emit('peer-mux-established', pi) | ||
|
|
||
| muxedConn.once('close', () => { | ||
| const b58Str = pi.id.toB58String() | ||
| delete swarm.muxedConns[b58Str] | ||
| pi.disconnect() | ||
| swarm._peerBook.get(b58Str).disconnect() | ||
| swarm.emit('peer-mux-closed', pi) | ||
| }) | ||
|
|
||
| // For incoming streams, in case identify is on | ||
| muxedConn.on('stream', (conn) => { | ||
| protocolMuxer(swarm.protocols, conn) | ||
| }) | ||
|
|
||
| cb(null, muxedConn) | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| function openConnInMuxedConn (muxer, cb) { | ||
| cb(muxer.newStream()) | ||
| } | ||
|
|
||
| function protocolHandshake (conn, protocol, cb) { | ||
| const ms = new multistream.Dialer() | ||
| ms.handle(conn, (err) => { | ||
| if (err) { | ||
| return cb(err) | ||
| } | ||
| ms.select(protocol, (err, conn) => { | ||
| if (err) { | ||
| return cb(err) | ||
| } | ||
| proxyConn.setInnerConn(conn) | ||
| cb(null, proxyConn) | ||
| }) | ||
| }) | ||
| } | ||
|
|
||
| function handleNew (conn, cb) { | ||
| cryptoDial(conn, (err, conn) => { | ||
| if (err) { | ||
| log(err) | ||
| return cb(err) | ||
| } | ||
| gotWarmedUpConn(conn, cb) | ||
| }) | ||
| } | ||
|
|
||
| function handleWarmedUp (conn, cb) { | ||
| gotWarmedUpConn(conn, cb) | ||
| } | ||
|
|
||
| function gotMuxer (muxer, cb) { | ||
| if (swarm.identify) { | ||
| // TODO: Consider: | ||
| // 1. overload getPeerInfo | ||
| // 2. exec identify (through getPeerInfo) | ||
| // 3. update the peerInfo that is already stored in the conn | ||
| } | ||
|
|
||
| openConnInMuxedConn(muxer, (conn) => { | ||
| protocolHandshake(conn, protocol, cb) | ||
| }) | ||
| } | ||
|
|
||
| return { | ||
| handleNew: handleNew, | ||
| handleWarmedUp: handleWarmedUp, | ||
| gotMuxer: gotMuxer | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.