@push.rocks/smartproxy
Version:
A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.
378 lines • 32.4 kB
JavaScript
import * as plugins from './plugins.js';
import { SecurityManager } from './classes.pp.securitymanager.js';
import { TimeoutManager } from './classes.pp.timeoutmanager.js';
/**
* Manages connection lifecycle, tracking, and cleanup
*/
export class ConnectionManager {
constructor(settings, securityManager, timeoutManager) {
this.settings = settings;
this.securityManager = securityManager;
this.timeoutManager = timeoutManager;
this.connectionRecords = new Map();
this.terminationStats = { incoming: {}, outgoing: {} };
}
/**
* Generate a unique connection ID
*/
generateConnectionId() {
return Math.random().toString(36).substring(2, 15) +
Math.random().toString(36).substring(2, 15);
}
/**
* Create and track a new connection
*/
createConnection(socket) {
const connectionId = this.generateConnectionId();
const remoteIP = socket.remoteAddress || '';
const localPort = socket.localPort || 0;
const record = {
id: connectionId,
incoming: socket,
outgoing: null,
incomingStartTime: Date.now(),
lastActivity: Date.now(),
connectionClosed: false,
pendingData: [],
pendingDataSize: 0,
bytesReceived: 0,
bytesSent: 0,
remoteIP,
localPort,
isTLS: false,
tlsHandshakeComplete: false,
hasReceivedInitialData: false,
hasKeepAlive: false,
incomingTerminationReason: null,
outgoingTerminationReason: null,
usingNetworkProxy: false,
isBrowserConnection: false,
domainSwitches: 0
};
this.trackConnection(connectionId, record);
return record;
}
/**
* Track an existing connection
*/
trackConnection(connectionId, record) {
this.connectionRecords.set(connectionId, record);
this.securityManager.trackConnectionByIP(record.remoteIP, connectionId);
}
/**
* Get a connection by ID
*/
getConnection(connectionId) {
return this.connectionRecords.get(connectionId);
}
/**
* Get all active connections
*/
getConnections() {
return this.connectionRecords;
}
/**
* Get count of active connections
*/
getConnectionCount() {
return this.connectionRecords.size;
}
/**
* Initiates cleanup once for a connection
*/
initiateCleanupOnce(record, reason = 'normal') {
if (this.settings.enableDetailedLogging) {
console.log(`[${record.id}] Connection cleanup initiated for ${record.remoteIP} (${reason})`);
}
if (record.incomingTerminationReason === null ||
record.incomingTerminationReason === undefined) {
record.incomingTerminationReason = reason;
this.incrementTerminationStat('incoming', reason);
}
this.cleanupConnection(record, reason);
}
/**
* Clean up a connection record
*/
cleanupConnection(record, reason = 'normal') {
if (!record.connectionClosed) {
record.connectionClosed = true;
// Track connection termination
this.securityManager.removeConnectionByIP(record.remoteIP, record.id);
if (record.cleanupTimer) {
clearTimeout(record.cleanupTimer);
record.cleanupTimer = undefined;
}
// Detailed logging data
const duration = Date.now() - record.incomingStartTime;
const bytesReceived = record.bytesReceived;
const bytesSent = record.bytesSent;
// Remove all data handlers to make sure we clean up properly
if (record.incoming) {
try {
// Remove our safe data handler
record.incoming.removeAllListeners('data');
// Reset the handler references
record.renegotiationHandler = undefined;
}
catch (err) {
console.log(`[${record.id}] Error removing data handlers: ${err}`);
}
}
// Handle incoming socket
this.cleanupSocket(record, 'incoming', record.incoming);
// Handle outgoing socket
if (record.outgoing) {
this.cleanupSocket(record, 'outgoing', record.outgoing);
}
// Clear pendingData to avoid memory leaks
record.pendingData = [];
record.pendingDataSize = 0;
// Remove the record from the tracking map
this.connectionRecords.delete(record.id);
// Log connection details
if (this.settings.enableDetailedLogging) {
console.log(`[${record.id}] Connection from ${record.remoteIP} on port ${record.localPort} terminated (${reason}).` +
` Duration: ${plugins.prettyMs(duration)}, Bytes IN: ${bytesReceived}, OUT: ${bytesSent}, ` +
`TLS: ${record.isTLS ? 'Yes' : 'No'}, Keep-Alive: ${record.hasKeepAlive ? 'Yes' : 'No'}` +
`${record.usingNetworkProxy ? ', Using NetworkProxy' : ''}` +
`${record.domainSwitches ? `, Domain switches: ${record.domainSwitches}` : ''}`);
}
else {
console.log(`[${record.id}] Connection from ${record.remoteIP} terminated (${reason}). Active connections: ${this.connectionRecords.size}`);
}
}
}
/**
* Helper method to clean up a socket
*/
cleanupSocket(record, side, socket) {
try {
if (!socket.destroyed) {
// Try graceful shutdown first, then force destroy after a short timeout
socket.end();
const socketTimeout = setTimeout(() => {
try {
if (!socket.destroyed) {
socket.destroy();
}
}
catch (err) {
console.log(`[${record.id}] Error destroying ${side} socket: ${err}`);
}
}, 1000);
// Ensure the timeout doesn't block Node from exiting
if (socketTimeout.unref) {
socketTimeout.unref();
}
}
}
catch (err) {
console.log(`[${record.id}] Error closing ${side} socket: ${err}`);
try {
if (!socket.destroyed) {
socket.destroy();
}
}
catch (destroyErr) {
console.log(`[${record.id}] Error destroying ${side} socket: ${destroyErr}`);
}
}
}
/**
* Creates a generic error handler for incoming or outgoing sockets
*/
handleError(side, record) {
return (err) => {
const code = err.code;
let reason = 'error';
const now = Date.now();
const connectionDuration = now - record.incomingStartTime;
const lastActivityAge = now - record.lastActivity;
if (code === 'ECONNRESET') {
reason = 'econnreset';
console.log(`[${record.id}] ECONNRESET on ${side} side from ${record.remoteIP}: ${err.message}. ` +
`Duration: ${plugins.prettyMs(connectionDuration)}, Last activity: ${plugins.prettyMs(lastActivityAge)} ago`);
}
else if (code === 'ETIMEDOUT') {
reason = 'etimedout';
console.log(`[${record.id}] ETIMEDOUT on ${side} side from ${record.remoteIP}: ${err.message}. ` +
`Duration: ${plugins.prettyMs(connectionDuration)}, Last activity: ${plugins.prettyMs(lastActivityAge)} ago`);
}
else {
console.log(`[${record.id}] Error on ${side} side from ${record.remoteIP}: ${err.message}. ` +
`Duration: ${plugins.prettyMs(connectionDuration)}, Last activity: ${plugins.prettyMs(lastActivityAge)} ago`);
}
if (side === 'incoming' && record.incomingTerminationReason === null) {
record.incomingTerminationReason = reason;
this.incrementTerminationStat('incoming', reason);
}
else if (side === 'outgoing' && record.outgoingTerminationReason === null) {
record.outgoingTerminationReason = reason;
this.incrementTerminationStat('outgoing', reason);
}
this.initiateCleanupOnce(record, reason);
};
}
/**
* Creates a generic close handler for incoming or outgoing sockets
*/
handleClose(side, record) {
return () => {
if (this.settings.enableDetailedLogging) {
console.log(`[${record.id}] Connection closed on ${side} side from ${record.remoteIP}`);
}
if (side === 'incoming' && record.incomingTerminationReason === null) {
record.incomingTerminationReason = 'normal';
this.incrementTerminationStat('incoming', 'normal');
}
else if (side === 'outgoing' && record.outgoingTerminationReason === null) {
record.outgoingTerminationReason = 'normal';
this.incrementTerminationStat('outgoing', 'normal');
// Record the time when outgoing socket closed.
record.outgoingClosedTime = Date.now();
}
this.initiateCleanupOnce(record, 'closed_' + side);
};
}
/**
* Increment termination statistics
*/
incrementTerminationStat(side, reason) {
this.terminationStats[side][reason] = (this.terminationStats[side][reason] || 0) + 1;
}
/**
* Get termination statistics
*/
getTerminationStats() {
return this.terminationStats;
}
/**
* Check for stalled/inactive connections
*/
performInactivityCheck() {
const now = Date.now();
const connectionIds = [...this.connectionRecords.keys()];
for (const id of connectionIds) {
const record = this.connectionRecords.get(id);
if (!record)
continue;
// Skip inactivity check if disabled or for immortal keep-alive connections
if (this.settings.disableInactivityCheck ||
(record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal')) {
continue;
}
const inactivityTime = now - record.lastActivity;
// Use extended timeout for extended-treatment keep-alive connections
let effectiveTimeout = this.settings.inactivityTimeout;
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'extended') {
const multiplier = this.settings.keepAliveInactivityMultiplier || 6;
effectiveTimeout = effectiveTimeout * multiplier;
}
if (inactivityTime > effectiveTimeout && !record.connectionClosed) {
// For keep-alive connections, issue a warning first
if (record.hasKeepAlive && !record.inactivityWarningIssued) {
console.log(`[${id}] Warning: Keep-alive connection from ${record.remoteIP} inactive for ${plugins.prettyMs(inactivityTime)}. Will close in 10 minutes if no activity.`);
// Set warning flag and add grace period
record.inactivityWarningIssued = true;
record.lastActivity = now - (effectiveTimeout - 600000);
// Try to stimulate activity with a probe packet
if (record.outgoing && !record.outgoing.destroyed) {
try {
record.outgoing.write(Buffer.alloc(0));
if (this.settings.enableDetailedLogging) {
console.log(`[${id}] Sent probe packet to test keep-alive connection`);
}
}
catch (err) {
console.log(`[${id}] Error sending probe packet: ${err}`);
}
}
}
else {
// For non-keep-alive or after warning, close the connection
console.log(`[${id}] Inactivity check: No activity on connection from ${record.remoteIP} ` +
`for ${plugins.prettyMs(inactivityTime)}.` +
(record.hasKeepAlive ? ' Despite keep-alive being enabled.' : ''));
this.cleanupConnection(record, 'inactivity');
}
}
else if (inactivityTime <= effectiveTimeout && record.inactivityWarningIssued) {
// If activity detected after warning, clear the warning
if (this.settings.enableDetailedLogging) {
console.log(`[${id}] Connection activity detected after inactivity warning, resetting warning`);
}
record.inactivityWarningIssued = false;
}
// Parity check: if outgoing socket closed and incoming remains active
if (record.outgoingClosedTime &&
!record.incoming.destroyed &&
!record.connectionClosed &&
now - record.outgoingClosedTime > 120000) {
console.log(`[${id}] Parity check: Incoming socket for ${record.remoteIP} still active ${plugins.prettyMs(now - record.outgoingClosedTime)} after outgoing closed.`);
this.cleanupConnection(record, 'parity_check');
}
}
}
/**
* Clear all connections (for shutdown)
*/
clearConnections() {
// Create a copy of the keys to avoid modification during iteration
const connectionIds = [...this.connectionRecords.keys()];
// First pass: End all connections gracefully
for (const id of connectionIds) {
const record = this.connectionRecords.get(id);
if (record) {
try {
// Clear any timers
if (record.cleanupTimer) {
clearTimeout(record.cleanupTimer);
record.cleanupTimer = undefined;
}
// End sockets gracefully
if (record.incoming && !record.incoming.destroyed) {
record.incoming.end();
}
if (record.outgoing && !record.outgoing.destroyed) {
record.outgoing.end();
}
}
catch (err) {
console.log(`Error during graceful connection end for ${id}: ${err}`);
}
}
}
// Short delay to allow graceful ends to process
setTimeout(() => {
// Second pass: Force destroy everything
for (const id of connectionIds) {
const record = this.connectionRecords.get(id);
if (record) {
try {
// Remove all listeners to prevent memory leaks
if (record.incoming) {
record.incoming.removeAllListeners();
if (!record.incoming.destroyed) {
record.incoming.destroy();
}
}
if (record.outgoing) {
record.outgoing.removeAllListeners();
if (!record.outgoing.destroyed) {
record.outgoing.destroy();
}
}
}
catch (err) {
console.log(`Error during forced connection destruction for ${id}: ${err}`);
}
}
}
// Clear all maps
this.connectionRecords.clear();
this.terminationStats = { incoming: {}, outgoing: {} };
}, 100);
}
}
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