lukechilds
/
bitcoincashjs
mirror of https://github.com/lukechilds/bitcoincashjs.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

Drop code for the p2p module

patch-2
Esteban Ordano 10 years ago
parent
dac8cdf0aa
commit
eaa07363a9
4 changed files with 1 additions and 1086 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 5
      lib/transport/index.js
  2. 613
      lib/transport/messages.js
  3. 194
      lib/transport/peer.js
  4. 275
      lib/transport/pool.js

5
lib/transport/index.js
View File

@ -2,8 +2,5 @@
* @namespace Transport
*/
module.exports = {
explorers: require('./explorers'),
Messages: require('./messages'),
Peer: require('./peer'),
Pool: require('./pool')
explorers: require('./explorers')
};

613
lib/transport/messages.js
View File

@ -1,613 +0,0 @@
'use strict';
/**
* @namespace Transport.Message
*/
/* jshint curly: false */
var Buffers = require('buffers');
var Put = require('bufferput');
var util = require('util');
var BlockHeaderModel = require('../blockheader');
var BlockModel = require('../block');
var BufferReader = require('../encoding/bufferreader');
var BufferUtil = require('../util/buffer');
var Hash = require('../crypto/hash');
var Random = require('../crypto/random');
var TransactionModel = require('../transaction');
var CONNECTION_NONCE = Random.getPseudoRandomBuffer(8);
var PROTOCOL_VERSION = 70000;
/**
* Static helper for consuming a data buffer until the next message.
*
* @name Transport.Message#parseMessage
* @param{Network} network - the network object
* @param{Buffer} dataBuffer - the buffer to read from
* @returns{Message|undefined} A message or undefined if there is nothing to read.
*/
var parseMessage = function(network, dataBuffer) {
if (dataBuffer.length < 20) return;
// Search the next magic number
if (!discardUntilNextMessage(network, dataBuffer)) return;
var PAYLOAD_START = 16;
var payloadLen = (dataBuffer.get(PAYLOAD_START)) +
(dataBuffer.get(PAYLOAD_START + 1) << 8) +
(dataBuffer.get(PAYLOAD_START + 2) << 16) +
(dataBuffer.get(PAYLOAD_START + 3) << 24);
var messageLength = 24 + payloadLen;
if (dataBuffer.length < messageLength) return;
var command = dataBuffer.slice(4, 16).toString('ascii').replace(/\0+$/, '');
var payload = dataBuffer.slice(24, messageLength);
var checksum = dataBuffer.slice(20, 24);
var checksumConfirm = Hash.sha256sha256(payload).slice(0, 4);
if (!BufferUtil.equals(checksumConfirm, checksum)) {
dataBuffer.skip(messageLength);
return;
}
dataBuffer.skip(messageLength);
return Message.buildMessage(command, payload);
};
module.exports.parseMessage = parseMessage;
/**
* @desc Internal function that discards data until founds the next message.
* @name Transport.Message#discardUntilNextMessage
*/
function discardUntilNextMessage(network, dataBuffer) {
var magicNumber = network.networkMagic;
var i = 0;
for (;;) {
// check if it's the beginning of a new message
var packageNumber = dataBuffer.slice(0, 4);
if (BufferUtil.equals(packageNumber, magicNumber)) {
dataBuffer.skip(i);
return true;
}
// did we reach the end of the buffer?
if (i > (dataBuffer.length - 4)) {
dataBuffer.skip(i);
return false;
}
i++; // continue scanning
}
}
/**
* Abstract Message that knows how to parse and serialize itself.
* Concret subclases should implement {fromBuffer} and {getPayload} methods.
* @name Transport.Message
*/
function Message() {}
/**
* @value
* @name Transport.Message.COMMANDS
*/
Message.COMMANDS = {};
/**
* Look up a message type by command name and instantiate the correct Message
* @name Transport.Message#buildMessage
*/
Message.buildMessage = function(command, payload) {
try {
var CommandClass = Message.COMMANDS[command];
return new CommandClass().fromBuffer(payload);
} catch (err) {
console.log('Error while parsing message', err);
}
};
/**
* Parse instance state from buffer.
*
* @param{Buffer} payload - the buffer to read from
* @returns{Message} The same message instance
*/
Message.prototype.fromBuffer = function(payload) {
/* jshint unused: false */
return this;
};
/**
* Serialize the payload into a buffer.
*
* @returns{Buffer} the serialized payload
*/
Message.prototype.getPayload = function() {
return BufferUtil.EMPTY_BUFFER;
};
/**
* Serialize the message into a buffer.
*
* @returns{Buffer} the serialized message
*/
Message.prototype.serialize = function(network) {
var magic = network.networkMagic;
var commandBuf = new Buffer(this.command, 'ascii');
if (commandBuf.length > 12) throw 'Command name too long';
var payload = this.getPayload();
var checksum = Hash.sha256sha256(payload).slice(0, 4);
// -- HEADER --
var message = new Put();
message.put(magic);
message.put(commandBuf);
message.pad(12 - commandBuf.length); // zero-padded
message.word32le(payload.length);
message.put(checksum);
// -- BODY --
message.put(payload);
return message.buffer();
};
module.exports.Message = Message;
/**
* Version Message
*
* @name Transport.Message.Version
* @param{string} subversion - version of the client
* @param{Buffer} nonce - a random 8 bytes buffer
*/
function Version(subversion, nonce) {
this.command = 'version';
this.version = PROTOCOL_VERSION;
this.subversion = subversion || '/BitcoinX:0.1/';
this.nonce = nonce || CONNECTION_NONCE;
}
util.inherits(Version, Message);
Version.prototype.fromBuffer = function(payload) {
var parser = new BufferReader(payload);
this.version = parser.readUInt32LE();
this.services = parser.readUInt64LEBN();
this.timestamp = parser.readUInt64LEBN();
this.addr_me = parser.read(26);
this.addr_you = parser.read(26);
this.nonce = parser.read(8);
this.subversion = parser.readVarintBuf().toString();
this.start_height = parser.readUInt32LE();
return this;
};
Version.prototype.getPayload = function() {
var put = new Put();
put.word32le(this.version); // version
put.word64le(1); // services
put.word64le(Math.round(new Date().getTime() / 1000)); // timestamp
put.pad(26); // addr_me
put.pad(26); // addr_you
put.put(this.nonce);
put.varint(this.subversion.length);
put.put(new Buffer(this.subversion, 'ascii'));
put.word32le(0);
return put.buffer();
};
module.exports.Version = Message.COMMANDS.version = Version;
/**
* Inv Message
*
* @name Transport.Message.Inventory
* @param{Array} inventory - reported elements
*/
function Inventory(inventory) {
this.command = 'inv';
this.inventory = inventory || [];
}
util.inherits(Inventory, Message);
Inventory.prototype.fromBuffer = function(payload) {
var parser = new BufferReader(payload);
var count = parser.readVarintNum();
for (var i = 0; i < count; i++) {
this.inventory.push({
type: parser.readUInt32LE(),
hash: parser.read(32)
});
}
return this;
};
Inventory.prototype.getPayload = function() {
var put = new Put();
put.varint(this.inventory.length);
this.inventory.forEach(function(value) {
put.word32le(value.type);
put.put(value.hash);
});
return put.buffer();
};
module.exports.Inventory = Message.COMMANDS.inv = Inventory;
/**
* Getdata Message
*
* @name Transport.Message.GetData
* @param{Array} inventory - requested elements
*/
function GetData(inventory) {
this.command = 'getdata';
this.inventory = inventory || [];
}
util.inherits(GetData, Inventory);
module.exports.GetData = GetData;
/**
* Ping Message
*
* @name Transport.Message.Ping
* @param{Buffer} nonce - a random 8 bytes buffer
*/
function Ping(nonce) {
this.command = 'ping';
this.nonce = nonce || CONNECTION_NONCE;
}
util.inherits(Ping, Message);
Ping.prototype.fromBuffer = function(payload) {
this.nonce = new BufferReader(payload).read(8);
return this;
};
Ping.prototype.getPayload = function() {
return this.nonce;
};
module.exports.Ping = Message.COMMANDS.ping = Ping;
/**
* Pong Message
*
* @name Transport.Message.Pong
* @param{Buffer} nonce - a random 8 bytes buffer
*/
function Pong(nonce) {
this.command = 'pong';
this.nonce = nonce || CONNECTION_NONCE;
}
util.inherits(Pong, Ping);
module.exports.Pong = Message.COMMANDS.pong = Pong;
/**
* Addr Message
*
* @name Transport.Message.Addressess
* @param{Array} addresses - array of know addresses
*/
function Addresses(addresses) {
this.command = 'addr';
this.addresses = addresses || [];
}
util.inherits(Addresses, Message);
Addresses.prototype.fromBuffer = function(payload) {
var parser = new BufferReader(payload);
var addrCount = Math.min(parser.readVarintNum(), 1000);
this.addresses = [];
for (var i = 0; i < addrCount; i++) {
// TODO: Time actually depends on the version of the other peer (>=31402)
var time = parser.readUInt32LE();
var services = parser.readUInt64LEBN();
// parse the ipv6 to a string
var ipv6 = [];
for (var a = 0; a < 6; a++) {
ipv6.push(parser.read(2).toString('hex'));
}
ipv6 = ipv6.join(':');
// parse the ipv4 to a string
var ipv4 = [];
for (var b = 0; b < 4; b++) {
ipv4.push(parser.read(1)[0]);
}
ipv4 = ipv4.join('.');
var port = parser.readUInt16BE();
this.addresses.push({
time: time,
services: services,
ip: { v6: ipv6, v4: ipv4 },
port: port
});
}
return this;
};
Addresses.prototype.getPayload = function() {
var put = new Put();
put.varint(this.addresses.length);
for (var i = 0; i < this.addresses.length; i++) {
put.word32le(this.addresses[i].time);
put.word64le(this.addresses[i].services);
put.put(this.addresses[i].ip);
put.word16be(this.addresses[i].port);
}
return put.buffer();
};
module.exports.Addresses = Message.COMMANDS.addr = Addresses;
/**
* GetAddr Message
*
* @name Transport.Message.GetAddresses
*/
function GetAddresses() {
this.command = 'getaddr';
}
util.inherits(GetAddresses, Message);
module.exports.GetAddresses = Message.COMMANDS.getaddr = GetAddresses;
/**
* Verack Message
*
* @name Transport.Message.VerAck
*/
function VerAck() {
this.command = 'verack';
}
util.inherits(VerAck, Message);
module.exports.VerAck = Message.COMMANDS.verack = VerAck;
/**
* Reject Message
*
* @name Transport.Message.Reject
*/
function Reject() {
this.command = 'reject';
}
util.inherits(Reject, Message);
// TODO: Parse REJECT message
module.exports.Reject = Message.COMMANDS.reject = Reject;
/**
* Alert Message
*
* @name Transport.Message.Alert
*/
function Alert(payload, signature) {
this.command = 'alert';
this.payload = payload || new Buffer(32);
this.signature = signature || new Buffer(32);
}
util.inherits(Alert, Message);
Alert.prototype.fromBuffer = function(payload) {
var parser = new BufferReader(payload);
this.payload = parser.readVarintBuf(); // TODO: Use current format
this.signature = parser.readVarintBuf();
return this;
};
Alert.prototype.getPayload = function() {
var put = new Put();
put.varint(this.payload.length);
put.put(this.payload);
put.varint(this.signature.length);
put.put(this.signature);
return put.buffer();
};
module.exports.Alert = Message.COMMANDS.alert = Alert;
/**
* Headers Message
*
* @name Transport.Message.Headers
* @param{Array} blockheaders - array of block headers
*/
function Headers(blockheaders) {
this.command = 'headers';
this.headers = blockheaders || [];
}
util.inherits(Headers, Message);
Headers.prototype.fromBuffer = function(payload) {
var parser = new BufferReader(payload);
var count = parser.readVarintNum();
this.headers = [];
for (var i = 0; i < count; i++) {
var header = BlockHeaderModel._fromBufferReader(parser);
this.headers.push(header);
}
return this;
};
Headers.prototype.getPayload = function() {
var put = new Put();
put.varint(this.headers.length);
for (var i = 0; i < this.headers.length; i++) {
var buffer = this.headers[i].toBuffer();
put.put(buffer);
}
return put.buffer();
};
module.exports.Headers = Message.COMMANDS.headers = Headers;
/**
* Block Message
*
* @name Transport.Message.Block
* @param{Block} block
*/
function Block(block) {
this.command = 'block';
this.block = block;
}
util.inherits(Block, Message);
Block.prototype.fromBuffer = function(payload) {
this.block = BlockModel(payload);
return this;
};
Block.prototype.getPayload = function() {
return this.block.toBuffer();
};
module.exports.Block = Message.COMMANDS.block = Block;
/**
* Tx Message
*
* @name Transport.Message.Transaction
* @param{Transaction} transaction
*/
function Transaction(transaction) {
this.command = 'tx';
this.transaction = transaction;
}
util.inherits(Transaction, Message);
Transaction.prototype.fromBuffer = function(payload) {
this.transaction = TransactionModel(payload);
return this;
};
Transaction.prototype.getPayload = function() {
return this.transaction.toBuffer();
};
module.exports.Transaction = Message.COMMANDS.tx = Transaction;
/**
* Getblocks Message
*
* @name Transport.Message.GetBlocks
* @param{Array} starts - array of buffers with the starting block hashes
* @param{Buffer} [stop] - hash of the last block
*/
function GetBlocks(starts, stop) {
this.command = 'getblocks';
this.version = PROTOCOL_VERSION;
this.starts = starts || [];
this.stop = stop || BufferUtil.NULL_HASH;
}
util.inherits(GetBlocks, Message);
GetBlocks.prototype.fromBuffer = function(payload) {
var parser = new BufferReader(payload);
this.version = parser.readUInt32LE();
var startCount = Math.min(parser.readVarintNum(), 500);
this.starts = [];
for (var i = 0; i < startCount; i++) {
this.starts.push(parser.read(32));
}
this.stop = parser.read(32);
return this;
};
GetBlocks.prototype.getPayload = function() {
var put = new Put();
put.word32le(this.version);
put.varint(this.starts.length);
for (var i = 0; i < this.starts.length; i++) {
if (this.starts[i].length !== 32) {
throw new Error('Invalid hash length');
}
put.put(this.starts[i]);
}
if (this.stop.length !== 32) {
throw new Error('Invalid hash length');
}
put.put(this.stop);
return put.buffer();
};
module.exports.GetBlocks = Message.COMMANDS.getblocks = GetBlocks;
/**
* Getheaders Message
*
* @name Transport.Message.GetHeaders
* @param{Array} starts - array of buffers with the starting block hashes
* @param{Buffer} [stop] - hash of the last block
*/
function GetHeaders(starts, stop) {
this.command = 'getheaders';
this.version = PROTOCOL_VERSION;
this.starts = starts || [];
this.stop = stop || BufferUtil.NULL_HASH;
}
util.inherits(GetHeaders, GetBlocks);
module.exports.GetHeaders = Message.COMMANDS.getheaders = GetHeaders;
/**
* GetMempool Message
*
* @name Transport.Message.GetMempool
*/
function GetMempool() {
this.command = 'mempool';
}
util.inherits(GetMempool, Message);
module.exports.GetMempool = Message.COMMANDS.mempool = GetMempool;
// TODO: Remove this PATCH (yemel)
Buffers.prototype.skip = function (i) {
if (i === 0) return;
if (i === this.length) {
this.buffers = [];
this.length = 0;
return;
}
var pos = this.pos(i);
this.buffers = this.buffers.slice(pos.buf);
this.buffers[0] = new Buffer(this.buffers[0].slice(pos.offset));
this.length -= i;
};

194
lib/transport/peer.js
View File

@ -1,194 +0,0 @@
'use strict';
var Buffers = require('buffers');
var EventEmitter = require('events').EventEmitter;
var Net = require('net');
var Socks5Client = require('socks5-client');
var util = require('util');
var Networks = require('../networks');
var Messages = require('./messages');
var MAX_RECEIVE_BUFFER = 10000000;
/**
* A Peer instance represents a remote bitcoin node and allows to communicate
* with it using the standar messages of the bitcoin p2p protocol.
*
* @example
* ```javascript
*
* var peer = new Peer('127.0.0.1').setProxy('127.0.0.1', 9050);
* peer.on('tx', function(tx) {
* console.log('New transaction: ', tx.id);
* });
* peer.connect();
* ```
*
* @param {String} host - IP address of the remote host
* @param {Number} [port] - Port number of the remote host
* @param {Network} [network] - The context for this communication
* @returns {Peer} A new instance of Peer.
* @constructor
*/
function Peer(host, port, network) {
if (!(this instanceof Peer)) {
return new Peer(host, port, network);
}
// overloading stuff
if (port instanceof Object && !network) {
network = port;
port = undefined;
}
this.host = host;
this.status = Peer.STATUS.DISCONNECTED;
this.network = network || Networks.livenet;
this.port = port || this.network.port;
this.dataBuffer = new Buffers();
this.version = 0;
this.bestHeight = 0;
this.subversion = null;
// set message handlers
var self = this;
this.on('verack', function() {
self.status = Peer.STATUS.READY;
self.emit('ready');
});
this.on('version', function(message) {
self.version = message.version;
self.subversion = message.subversion;
self.bestHeight = message.start_height
});
this.on('ping', function(message) {
self._sendPong(message.nonce);
});
}
util.inherits(Peer, EventEmitter);
Peer.STATUS = {
DISCONNECTED: 'disconnected',
CONNECTING: 'connecting',
CONNECTED: 'connected',
READY: 'ready'
};
/**
* Set a socks5 proxy for the connection. Enables the use of the TOR network.
*
* @param {String} host - IP address of the proxy
* @param {Number} port - Port number of the proxy
* @returns {Peer} The same Peer instance.
*/
Peer.prototype.setProxy = function(host, port) {
if (this.status != Peer.STATUS.DISCONNECTED) {
throw Error('Invalid State');
}
this.proxy = {
host: host,
port: port
};
return this;
};
/**
* Init the connection with the remote peer.
*
* @returns {Socket} The same peer instance.
*/
Peer.prototype.connect = function() {
this.socket = this._getSocket();
this.status = Peer.STATUS.CONNECTING;
var self = this;
this.socket.on('connect', function(ev) {
self.status = Peer.STATUS.CONNECTED;
self.emit('connect');
self._sendVersion();
});
this.socket.on('error', self.disconnect.bind(this));
this.socket.on('end', self.disconnect.bind(this));
this.socket.on('data', function(data) {
self.dataBuffer.push(data);
if (self.dataBuffer.length > MAX_RECEIVE_BUFFER) return self.disconnect();
self._readMessage();
});
this.socket.connect(this.port, this.host);
return this;
};
/**
* Disconnects the remote connection.
*
* @returns {Socket} The same peer instance.
*/
Peer.prototype.disconnect = function() {
this.status = Peer.STATUS.DISCONNECTED;
this.socket.destroy();
this.emit('disconnect');
return this;
};
/**
* Send a Message to the remote peer.
*
* @param {Message} message - A message instance
*/
Peer.prototype.sendMessage = function(message) {
this.socket.write(message.serialize(this.network));
};
/**
* Internal function that sends VERSION message to the remote peer.
*/
Peer.prototype._sendVersion = function() {
var message = new Messages.Version();
this.sendMessage(message);
};
/**
* Send a PONG message to the remote peer.
*/
Peer.prototype._sendPong = function(nonce) {
var message = new Messages.Pong(nonce);
this.sendMessage(message);
};
/**
* Internal function that tries to read a message from the data buffer
*/
Peer.prototype._readMessage = function() {
var message = Messages.parseMessage(this.network, this.dataBuffer);
if (message) {
this.emit(message.command, message);
this._readMessage();
}
};
/**
* Internal function that creates a socket using a proxy if neccesary.
*
* @returns {Socket} A Socket instance not yet connected.
*/
Peer.prototype._getSocket = function() {
if (this.proxy) {
return new Socks5Client(this.proxy.host, this.proxy.port);
}
return new Net.Socket();
};
module.exports = Peer;

275
lib/transport/pool.js
View File

@ -1,275 +0,0 @@
'use strict';
var dns = require('dns');
var EventEmitter = require('events').EventEmitter;
var Networks = require('../networks');
var sha256 = require('../crypto/hash').sha256;
var Peer = require('./peer');
var util = require('util');
function now() {
return Math.floor(new Date().getTime() / 1000);
}
/**
* A pool is a collection of Peers. A pool will discover peers from DNS seeds, and
* collect information about new peers in the network. When a peer disconnects the pool
* will connect to others that are available to maintain a max number of
* ongoing peer connections. Peer events are relayed to the pool.
*
* @example
* ```javascript
*
* var pool = new Pool(Networks.livenet);
* pool.on('peerinv', function(peer, message) {
* // do something with the inventory announcement
* });
* pool.connect();
* ```
*
* @param {Network|String} network - The network to connect
* @returns {Pool}
* @constructor
*/
function Pool(network) {
var self = this;
this.network = Networks.get(network) || Networks.defaultNetwork;
this.keepalive = false;
this._connectedPeers = {};
this._addrs = [];
this.on('peeraddr', function peerAddrEvent(peer, message) {
var addrs = message.addresses;
var length = addrs.length;
for (var i = 0; i < length; i++) {
var addr = addrs[i];
// In case of an invalid time, assume "5 days ago"
if (addr.time <= 100000000 || addr.time > (now() + 10 * 60)) {
addr.time = now() - 5 * 24 * 60 * 60;
}
this._addAddr(addr);
}
});
this.on('seed', function seedEvent(ips) {
ips.forEach(function(ip) {
self._addAddr({
ip: {
v4: ip
}
});
});
if (self.keepalive) {
self._fillConnections();
}
});
this.on('peerdisconnect', function peerDisconnectEvent(peer, addr) {
self._deprioritizeAddr(addr);
self._removeConnectedPeer(addr);
if (self.keepalive) {
self._fillConnections();
}
});
return this;
}
util.inherits(Pool, EventEmitter);
Pool.MaxConnectedPeers = 8;
Pool.RetrySeconds = 30;
Pool.PeerEvents = ['version', 'inv', 'getdata', 'ping', 'ping', 'addr',
'getaddr', 'verack', 'reject', 'alert', 'headers', 'block',
'tx', 'getblocks', 'getheaders'
];
/**
* Will initiatiate connection to peers, if available peers have been added to
* the pool, it will connect to those, otherwise will use DNS seeds to find
* peers to connect. When a peer disconnects it will add another.
*/
Pool.prototype.connect = function connect() {
this.keepalive = true;
var self = this;
if (self._addrs.length === 0) {
self._addAddrsFromSeeds();
} else {
self._fillConnections();
}
return this;
};
/**
* Will disconnect all peers that are connected.
*/
Pool.prototype.disconnect = function disconnect() {
this.keepalive = false;
for (var i in this._connectedPeers) {
this._connectedPeers[i].disconnect();
}
return this;
};
/**
* @returns {Number} The number of peers currently connected.
*/
Pool.prototype.numberConnected = function numberConnected() {
return Object.keys(this._connectedPeers).length;
};
/**
* Will fill the conneted peers to the maximum amount.
*/
Pool.prototype._fillConnections = function _fillConnections() {
var length = this._addrs.length;
for (var i = 0; i < length; i++) {
if (this.numberConnected() >= Pool.MaxConnectedPeers) {
break;
}
var addr = this._addrs[i];
if (!addr.retryTime || now() > addr.retryTime) {
this._connectPeer(addr);
}
}
return this;
};
/**
* Will remove a peer from the list of connected peers.
* @param {Object} addr - An addr from the list of addrs
*/
Pool.prototype._removeConnectedPeer = function _removeConnectedPeer(addr) {
if (this._connectedPeers[addr.hash].status !== Peer.STATUS.DISCONNECTED) {
this._connectedPeers[addr.hash].disconnect();
} else {
delete this._connectedPeers[addr.hash];
}
return this;
};
/**
* Will connect a peer and add to the list of connected peers.
* @param {Object} addr - An addr from the list of addrs
*/
Pool.prototype._connectPeer = function _connectPeer(addr) {
var self = this;
function addConnectedPeer(addr) {
var port = addr.port || self.network.port;
var ip = addr.ip.v4 || addr.ip.v6;
var peer = new Peer(ip, port, self.network);
peer.on('disconnect', function peerDisconnect() {
self.emit('peerdisconnect', peer, addr);
});
peer.on('ready', function peerReady() {
self.emit('peerready', peer, addr);
});
Pool.PeerEvents.forEach(function addPeerEvents(event) {
peer.on(event, function peerEvent(message) {
self.emit('peer' + event, peer, message);
});
});
peer.connect();
self._connectedPeers[addr.hash] = peer;
}
if (!this._connectedPeers[addr.hash]) {
addConnectedPeer(addr);
}
return this;
};
/**
* Will deprioritize an addr in the list of addrs by moving it to the end
* of the array, and setting a retryTime
* @param {Object} addr - An addr from the list of addrs
*/
Pool.prototype._deprioritizeAddr = function _deprioritizeAddr(addr) {
for (var i = 0; i < this._addrs.length; i++) {
if (this._addrs[i].hash === addr.hash) {
var middle = this._addrs[i];
middle.retryTime = now() + Pool.RetrySeconds;
var beginning = this._addrs.splice(0, i);
var end = this._addrs.splice(i + 1, this._addrs.length);
var combined = beginning.concat(end);
this._addrs = combined.concat([middle]);
}
}
return this;
};
/**
* Will add an addr to the beginning of the addrs array
* @param {Object}
*/
Pool.prototype._addAddr = function _addAddr(addr) {
// make a unique key
addr.hash = sha256(new Buffer(addr.ip.v6 + addr.ip.v4 + addr.port)).toString('hex');
var length = this._addrs.length;
var exists = false;
for (var i = 0; i < length; i++) {
if (this._addrs[i].hash === addr.hash) {
exists = true;
}
}
if (!exists) {
this._addrs.unshift(addr);
}
return this;
};
/**
* Will add addrs to the list of addrs from a DNS seed
* @param {String} seed - A domain name to resolve known peers
* @param {Function} done
*/
Pool.prototype._addAddrsFromSeed = function _addAddrsFromSeed(seed) {
var self = this;
dns.resolve(seed, function(err, ips) {
if (err) {
self.emit('seederror', err);
return;
}
if (!ips || !ips.length) {
self.emit('seederror', new Error('No IPs found from seed lookup.'));
return;
}
// announce to pool
self.emit('seed', ips);
});
return this;
};
/**
* Will add addrs to the list of addrs from network DNS seeds
* @param {Function} done
*/
Pool.prototype._addAddrsFromSeeds = function _addAddrsFromSeeds() {
var self = this;
var seeds = this.network.dnsSeeds;
seeds.forEach(function(seed) {
self._addAddrsFromSeed(seed);
});
return this;
};
/**
* @returns {String} A string formatted for the console
*/
Pool.prototype.inspect = function inspect() {
return '<Pool network: ' +
this.network + ', connected: ' +
this.numberConnected() + ', available: ' +
this._addrs.length + '>';
};
module.exports = Pool;
Write Preview
Loading…
Cancel
Save