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feat: server factory integration (#5)
Co-authored-by: Daniel Lando <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,132 @@ | ||
| var protocolDecoder = require('./lib/protocol-decoder') | ||
| 'use strict' | ||
|
|
||
| const proxyProtocol = require('proxy-protocol-js') | ||
| const forwarded = require('forwarded') | ||
|
|
||
| const v1ProxyProtocolSignature = Buffer.from('PROXY ', 'utf8') | ||
| const v2ProxyProtocolSignature = Buffer.from('0d0a0d0a000d0a515549540a', 'hex') | ||
|
|
||
| function isValidV1ProxyProtocol (buffer) { | ||
| for (let i = 0; i < v1ProxyProtocolSignature.length; i++) { | ||
| if (buffer[i] !== v1ProxyProtocolSignature[i]) { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| function isValidV2ProxyProtocol (buffer) { | ||
| for (let i = 0; i < v2ProxyProtocolSignature.length; i++) { | ||
| if (buffer[i] !== v2ProxyProtocolSignature[i]) { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| // from https://stackoverflow.com/questions/57077161/how-do-i-convert-hex-buffer-to-ipv6-in-javascript | ||
| function parseIpV6Array (ip) { | ||
| const ipHex = Buffer.from(ip).toString('hex') | ||
| return ipHex.match(/.{1,4}/g) | ||
| .map((val) => val.replace(/^0+/, '')) | ||
| .join(':') | ||
| .replace(/0000:/g, ':') | ||
| .replace(/:{2,}/g, '::') | ||
| } | ||
|
|
||
| function getProtoIpFamily (ipFamily) { | ||
| if (ipFamily && ipFamily.endsWith('4')) { | ||
| return 4 | ||
| } else if (ipFamily && ipFamily.endsWith('6')) { | ||
| return 6 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| function extractHttpDetails (req, socket, proto = {}) { | ||
| const headers = req && req.headers ? req.headers : null | ||
| if (headers) { | ||
| if (headers['x-forwarded-for']) { | ||
| const addresses = forwarded(req) | ||
| proto.ipAddress = headers['x-real-ip'] ? headers['x-real-ip'] : addresses[addresses.length - 1] | ||
| proto.serverIpAddress = addresses[0] | ||
| } | ||
| if (headers['x-real-ip']) { | ||
| proto.ipAddress = headers['x-real-ip'] | ||
| } | ||
| proto.port = socket._socket.remotePort | ||
| proto.ipFamily = getProtoIpFamily(socket._socket.remoteFamily) | ||
| proto.isWebsocket = true | ||
| } | ||
| return proto | ||
| } | ||
|
|
||
| function extractProxyDetails (buffer, proto = {}) { | ||
| let proxyProto | ||
| if (isValidV1ProxyProtocol(buffer)) { | ||
| proxyProto = proxyProtocol.V1BinaryProxyProtocol.parse(buffer) | ||
| if (proxyProto && proxyProto.source && proxyProto.data) { | ||
| proto.ipFamily = getProtoIpFamily(proxyProto.inetProtocol) | ||
| proto.ipAddress = proxyProto.source.ipAddress | ||
| proto.port = proxyProto.source.port | ||
| proto.serverIpAddress = proxyProto.destination.ipAddress | ||
| proto.data = proxyProto.data | ||
| proto.isProxy = 1 | ||
| } | ||
| } else if (isValidV2ProxyProtocol(buffer)) { | ||
| proxyProto = proxyProtocol.V2ProxyProtocol.parse(buffer) | ||
| if (proxyProto && proxyProto.proxyAddress && proxyProto.data) { | ||
| if (proxyProto.proxyAddress instanceof proxyProtocol.IPv4ProxyAddress) { | ||
| proto.ipAddress = proxyProto.proxyAddress.sourceAddress.address.join('.') | ||
| proto.port = proxyProto.proxyAddress.sourcePort | ||
| proto.serverIpAddress = proxyProto.proxyAddress.destinationAddress.address.join('.') | ||
| proto.ipFamily = 4 | ||
| } else if (proxyProto.proxyAddress instanceof proxyProtocol.IPv6ProxyAddress) { | ||
| proto.ipAddress = parseIpV6Array(proxyProto.proxyAddress.sourceAddress.address) | ||
| proto.port = proxyProto.proxyAddress.sourcePort | ||
| proto.serverIpAddress = parseIpV6Array(proxyProto.proxyAddress.destinationAddress.address) | ||
| proto.ipFamily = 6 | ||
| } | ||
| proto.isProxy = 2 | ||
| proto.data = Buffer.isBuffer(proxyProto.data) ? proxyProto.data : Buffer.from(proxyProto.data) | ||
| } | ||
| } | ||
| return proto | ||
| } | ||
|
|
||
| function extractSocketDetails (socket, proto = {}) { | ||
| if (socket._socket && socket._socket.address) { | ||
| proto.isWebsocket = true | ||
| proto.ipAddress = socket._socket.remoteAddress | ||
| proto.port = socket._socket.remotePort | ||
| proto.serverIpAddress = socket._socket.address().address | ||
| proto.ipFamily = getProtoIpFamily(socket._socket.remoteFamily) | ||
| } else if (socket.address) { | ||
| proto.ipAddress = socket.remoteAddress | ||
| proto.port = socket.remotePort | ||
| proto.serverIpAddress = socket.address().address | ||
| proto.ipFamily = getProtoIpFamily(socket.remoteFamily) | ||
| } | ||
| return proto | ||
| } | ||
|
|
||
| function protocolDecoder (conn, buffer, req) { | ||
| const proto = {} | ||
| if (!buffer) return proto | ||
| const socket = conn.socket || conn | ||
| proto.isProxy = 0 | ||
| proto.isWebsocket = false | ||
| extractHttpDetails(req, socket, proto) | ||
| extractProxyDetails(buffer, proto) | ||
|
|
||
| if (!proto.ipAddress) { | ||
| extractSocketDetails(socket, proto) | ||
| } | ||
|
|
||
| return proto | ||
| } | ||
|
|
||
| module.exports = { | ||
| extractSocketDetails, | ||
| protocolDecoder | ||
| } |
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