Merge remote-tracking branch 'gordonwritescode/feature/peer-discovery'
This commit is contained in:
commit
3267925ebf
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@ -0,0 +1,4 @@
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var PeerManager = require('../lib/PeerManager');
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var peerman = new PeerManager();
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peerman.discover({ limit: 12 }).start();
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@ -34,8 +34,8 @@ function Peer(host, port, services) {
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Peer.IPV6_IPV4_PADDING = new Buffer([0,0,0,0,0,0,0,0,0,0,255,255]);
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Peer.prototype.createConnection = function () {
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var c = Net.createConnection(this.port, this.host);
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return c;
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this.connection = Net.createConnection(this.port, this.host);
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return this.connection;
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};
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Peer.prototype.getHostAsBuffer = function () {
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@ -1,10 +1,8 @@
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var imports = require('soop').imports();
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var extend = imports.extend || require('extend');
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var log = imports.log || require('../util/log');
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var bitcoreDefaults = imports.config || require('../config');
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var Connection = imports.Connection || require ('./Connection');
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var Peer = imports.Peer || require('./Peer');
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GetAdjustedTime = imports.GetAdjustedTime || function () {
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@ -13,11 +11,13 @@ GetAdjustedTime = imports.GetAdjustedTime || function () {
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};
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function PeerManager(config) {
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this.config = config || bitcoreDefaults;
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// extend defaults with config
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this.config = extend(true, config || {}, bitcoreDefaults);
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this.active = false;
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this.timer = null;
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this.peers = [];
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this.pool = [];
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this.connections = [];
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this.isConnected = false;
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this.peerDiscovery = false;
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@ -26,6 +26,12 @@ function PeerManager(config) {
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this.interval = 5000;
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this.minConnections = 8;
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this.minKnownPeers = 10;
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// keep track of tried seeds and results
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this.seeds = {
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resolved: [],
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failed: []
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};
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}
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PeerManager.parent = imports.parent || require('events').EventEmitter;
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@ -61,6 +67,13 @@ PeerManager.prototype.addPeer = function(peer, port) {
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}
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};
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PeerManager.prototype.removePeer = function(peer) {
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var index = this.peers.indexOf(peer);
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var exists = !!~index;
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if (exists) this.peers.splice(index, 1);
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return exists;
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};
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PeerManager.prototype.checkStatus = function checkStatus() {
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// Make sure we are connected to all forcePeers
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if(this.peers.length) {
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@ -77,6 +90,13 @@ PeerManager.prototype.checkStatus = function checkStatus() {
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}
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});
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// for debug purposes, print how many of our peers are actually connected
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var connected = 0
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this.peers.forEach(function(p) {
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if (p.connection && !p.connection._connecting) connected++
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});
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log.info(connected + ' of ' + this.peers.length + ' peers connected');
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Object.keys(peerIndex).forEach(function(i) {
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this.connectTo(peerIndex[i]);
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}.bind(this));
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@ -84,7 +104,7 @@ PeerManager.prototype.checkStatus = function checkStatus() {
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};
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PeerManager.prototype.connectTo = function(peer) {
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log.info('connecting to '+peer);
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log.info('connecting to ' + peer);
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try {
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return this.addConnection(peer.createConnection(), peer);
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} catch (e) {
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@ -174,10 +194,16 @@ PeerManager.prototype.handleError = function(e) {
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};
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PeerManager.prototype.handleDisconnect = function(e) {
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log.info('disconnected from peer '+e.peer);
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log.info('disconnected from peer ' + e.peer);
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var i = this.connections.indexOf(e.conn);
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if(i != -1) this.connections.splice(i, 1);
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this.removePeer(e.peer);
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if (this.pool.length) {
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log.info('replacing peer using the pool of ' + this.pool.length + ' seeds');
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this.addPeer(this.pool.pop());
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}
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if(!this.connections.length) {
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this.emit('netDisconnected');
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this.isConnected = false;
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@ -212,4 +238,72 @@ PeerManager.prototype.getActiveConnections = function () {
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return this.connections.slice(0);
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};
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PeerManager.prototype.discover = function(options, callback) {
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var self = this;
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var async = imports.async || require('async');
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var dns = imports.dns || require('dns');
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var networks = imports.networks || require('../networks');
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var seeds = networks[self.config.network].dnsSeeds;
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self.limit = options.limit || 12;
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var dnsExecutor = seeds.map(function(seed) {
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return function(done) {
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// have we already resolved this seed?
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if (~self.seeds.resolved.indexOf(seed)) {
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// if so, just pass back cached peer list
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return done(null, self.seeds.results[seed]);
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}
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// has this seed failed to resolve?
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if (~self.seeds.failed.indexOf(seed)) {
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// if so, pass back empty results
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return done(null, []);
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}
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log.info('resolving dns seed '+ seed);
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dns.resolve(seed, function(err, peers) {
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if (err) {
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log.err('failed to resolve dns seed '+ seed, err);
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self.seeds.failed.push(seed);
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return done(null, []);
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}
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log.info('found '+ peers.length + ' peers from ' + seed);
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self.seeds.resolved.push(seed);
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// transform that list into a list of Peer instances
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peers = peers.map(function(ip) {
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return new Peer(ip, networks.defaultClientPort);
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});
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peers.forEach(function(p) {
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if (self.peers.length < self.limit) self.addPeer(p);
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else self.pool.push(p);
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});
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self.emit('peers', peers);
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return done(null, peers);
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});
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};
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});
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// try resolving all seeds
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async.parallel(dnsExecutor, function(err, results) {
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var peers = [];
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// consolidate all resolved peers into one list
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results.forEach(function(peerlist) {
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peers = peers.concat(peerlist);
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});
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if (typeof callback === 'function') callback(null, peers);
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});
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return self;
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};
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module.exports = require('soop')(PeerManager);
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18
networks.js
18
networks.js
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prev_hash: buffertools.fill(new Buffer(32), 0),
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timestamp: 1231006505,
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bits: 486604799,
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}
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},
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dnsSeeds: [
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'seed.bitcoin.sipa.be',
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'dnsseed.bluematt.me',
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'dnsseed.bitcoin.dashjr.org',
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'seed.bitcoinstats.com',
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'seed.bitnodes.io',
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'bitseed.xf2.org'
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],
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defaultClientPort: 8333
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};
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exports.testnet = {
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prev_hash: buffertools.fill(new Buffer(32), 0),
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timestamp: 1296688602,
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bits: 486604799,
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}
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},
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dnsSeeds: [
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'testnet-seed.bitcoin.petertodd.org',
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'testnet-seed.bluematt.me'
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],
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defaultClientPort: 18333
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};
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@ -70,7 +70,8 @@
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"socks5-client": "~0.3.6",
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"brfs": "=1.0.0",
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"chai": "=1.9.1",
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"uglifyify": "=1.2.3"
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"uglifyify": "=1.2.3",
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"extend": "~1.2.1"
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},
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"devDependencies": {
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"grunt-contrib-watch": "~0.5.3",
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