var obj = {};

obj.ws = ws;

obj.res = res;

obj.user = user;

obj.ruserid = null;

obj.req = req; // Used in multi-server.js

obj.id = req.query.id;

obj.file = req.query.f;

// Check relay authentication

if ((user == null) && (obj.req.query != null) && (obj.req.query.rauth != null)) {

const rcookie = parent.parent.decodeCookie(obj.req.query.rauth, parent.parent.loginCookieEncryptionKey, 240); // Cookie with 4 hour timeout

if (rcookie.ruserid != null) { obj.ruserid = rcookie.ruserid; }

}

// Relay session count (we may remove this in the future)

obj.relaySessionCounted = true;

parent.relaySessionCount++;

// Mesh Rights

const MESHRIGHT_EDITMESH = 1;

const MESHRIGHT_MANAGEUSERS = 2;

const MESHRIGHT_MANAGECOMPUTERS = 4;

const MESHRIGHT_REMOTECONTROL = 8;

const MESHRIGHT_AGENTCONSOLE = 16;

const MESHRIGHT_SERVERFILES = 32;

const MESHRIGHT_WAKEDEVICE = 64;

const MESHRIGHT_SETNOTES = 128;

const MESHRIGHT_REMOTEVIEW = 256;

// Site rights

const SITERIGHT_SERVERBACKUP = 1;

const SITERIGHT_MANAGEUSERS = 2;

const SITERIGHT_SERVERRESTORE = 4;

const SITERIGHT_FILEACCESS = 8;

const SITERIGHT_SERVERUPDATE = 16;

const SITERIGHT_LOCKED = 32;

// Clean a IPv6 address that encodes a IPv4 address

function cleanRemoteAddr(addr) { if (addr.startsWith('::ffff:')) { return addr.substring(7); } else { return addr; } }

// Disconnect

obj.close = function (arg) {

if (obj.ws != null) {

if ((arg == 1) || (arg == null)) { try { obj.ws.close(); parent.parent.debug('relay', 'FileRelay: Soft disconnect (' + obj.req.clientIp + ')'); } catch (ex) { console.log(e); } } // Soft close, close the websocket

if (arg == 2) { try { obj.ws._socket._parent.end(); parent.parent.debug('relay', 'FileRelay: Hard disconnect (' + obj.req.clientIp + ')'); } catch (ex) { console.log(e); } } // Hard close, close the TCP socket

} else if (obj.res != null) {

try { res.sendStatus(404); } catch (ex) { }

}

// Aggressive cleanup

delete obj.ws;

delete obj.res;

delete obj.peer;

};

// If there is no authentication, drop this connection

if ((obj.id == null) || ((obj.user == null) && (obj.ruserid == null))) { try { obj.close(); parent.parent.debug('relay', 'FileRelay: Connection with no authentication (' + obj.req.clientIp + ')'); } catch (e) { console.log(e); } return; }

obj.sendAgentMessage = function (command, user, domainid) {

var rights, mesh;

if (command.nodeid == null) return false;

var splitnodeid = command.nodeid.split('/');

// Check that we are in the same domain and the user has rights over this node.

if ((splitnodeid[0] == 'node') && (splitnodeid[1] == domainid)) {

// Get the user object

// See if the node is connected

var agent = parent.wsagents[command.nodeid];

if (agent != null) {

// Check if we have permission to send a message to that node

rights = parent.GetNodeRights(user, agent.dbMeshKey, agent.dbNodeKey);

mesh = parent.meshes[agent.dbMeshKey];

if ((rights != null) && (mesh != null) || ((rights & MESHRIGHT_REMOTECONTROL) != 0)) { // 8 is device remote control

command.rights = rights; // Add user rights flags to the message

if (typeof command.consent == 'number') { command.consent = command.consent | mesh.consent; } else { command.consent = mesh.consent; } // Add user consent

if (typeof domain.userconsentflags == 'number') { command.consent |= domain.userconsentflags; } // Add server required consent flags

command.username = user.name; // Add user name

command.realname = user.realname; // Add real name

if (typeof domain.desktopprivacybartext == 'string') { command.privacybartext = domain.desktopprivacybartext; } // Privacy bar text

delete command.nodeid; // Remove the nodeid since it's implyed.

agent.send(JSON.stringify(command));

return true;

}

} else {

// Check if a peer server is connected to this agent

var routing = parent.parent.GetRoutingServerIdNotSelf(command.nodeid, 1); // 1 = MeshAgent routing type

if (routing != null) {

// Check if we have permission to send a message to that node

rights = parent.GetNodeRights(user, routing.meshid, command.nodeid);

mesh = parent.meshes[routing.meshid];

if (rights != null || ((rights & MESHRIGHT_REMOTECONTROL) != 0)) { // 8 is device remote control

command.rights = rights; // Add user rights flags to the message

if (typeof command.consent == 'number') { command.consent = command.consent | mesh.consent; } else { command.consent = mesh.consent; } // Add user consent

if (typeof domain.userconsentflags == 'number') { command.consent |= domain.userconsentflags; } // Add server required consent flags

command.username = user.name; // Add user name

command.realname = user.realname; // Add real name

if (typeof domain.desktopprivacybartext == 'string') { command.privacybartext = domain.desktopprivacybartext; } // Privacy bar text

parent.parent.multiServer.DispatchMessageSingleServer(command, routing.serverid);

return true;

}

}

}

}

return false;

};

function performRelay() {

if (obj.id == null) { try { obj.close(); } catch (e) { } return; } // Attempt to connect without id, drop this.

if (obj.ws != null) { obj.ws._socket.setKeepAlive(true, 240000); } // Set TCP keep alive

// Check the peer connection status

{

var relayinfo = parent.wsrelays[obj.id];

if (relayinfo) {

if (relayinfo.state == 1) {

// Check that at least one connection is authenticated

if ((obj.authenticated != true) && (relayinfo.peer1.authenticated != true)) {

if (ws) { ws.close(); }

parent.parent.debug('relay', 'FileRelay without-auth: ' + obj.id + ' (' + obj.req.clientIp + ')');

delete obj.id;

delete obj.ws;

delete obj.peer;

return;

}

// Connect to peer

obj.peer = relayinfo.peer1;

obj.peer.peer = obj;

relayinfo.peer2 = obj;

relayinfo.state = 2;

// Remove the timeout

if (relayinfo.timeout) { clearTimeout(relayinfo.timeout); delete relayinfo.timeout; }

var agentws = null, file = null;

if (relayinfo.peer1.ws) { relayinfo.peer1.ws.res = relayinfo.peer2.res; relayinfo.peer1.ws.res = relayinfo.peer2.res; relayinfo.peer1.ws.file = relayinfo.peer2.file; agentws = relayinfo.peer1.ws; file = relayinfo.peer2.file; }

if (relayinfo.peer2.ws) { relayinfo.peer2.ws.res = relayinfo.peer1.res; relayinfo.peer2.ws.res = relayinfo.peer1.res; relayinfo.peer2.ws.file = relayinfo.peer1.file; agentws = relayinfo.peer2.ws; file = relayinfo.peer1.file; }

agentws._socket.resume(); // Release the traffic

try { agentws.send('c'); } catch (ex) { } // Send connect to agent

try { agentws.send(JSON.stringify({ type: 'options', file: file })); } catch (ex) { } // Send options to agent

try { agentws.send('10'); } catch (ex) { } // Send file transfer protocol to agent

parent.parent.debug('relay', 'FileRelay connected: ' + obj.id + ' (' + obj.req.clientIp + ' --> ' + obj.peer.req.clientIp + ')');

// Log the connection

if (obj.user != null) {

var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: obj.user._id, username: obj.user.name, msg: "Started file transfer session" + ' \"' + obj.id + '\" from ' + obj.peer.req.clientIp + ' to ' + req.clientIp, protocol: req.query.p, nodeid: req.query.nodeid };

parent.parent.DispatchEvent(['*', obj.user._id], obj, event);

}

} else {

// Connected already, drop this connection.

if (obj.ws) { obj.ws.close(); }

parent.parent.debug('relay', 'FileRelay duplicate: ' + obj.id + ' (' + obj.req.clientIp + ')');

delete obj.id;

delete obj.ws;

delete obj.peer;

return;

}

} else {

// Wait for other relay connection

parent.wsrelays[obj.id] = { peer1: obj, state: 1, timeout: setTimeout(closeBothSides, 30000) };

parent.parent.debug('relay', 'FileRelay holding: ' + obj.id + ' (' + obj.req.clientIp + ') ' + (obj.authenticated ? 'Authenticated' : ''));

if (obj.ws != null) {

// Websocket connection

obj.ws._socket.pause();

// Check if a peer server has this connection

if (parent.parent.multiServer != null) {

var rsession = parent.wsPeerRelays[obj.id];

if ((rsession != null) && (rsession.serverId > parent.parent.serverId)) {

// We must initiate the connection to the peer

parent.parent.multiServer.createPeerRelay(ws, req, rsession.serverId, obj.req.session.userid);

delete parent.wsrelays[obj.id];

return;

} else {

// Unexpected connection, drop it

if (obj.ws) { obj.ws.close(); }

parent.parent.debug('relay', 'FileRelay unexpected connection: ' + obj.id + ' (' + obj.req.clientIp + ')');

delete obj.id;

delete obj.ws;

delete obj.peer;

return;

}

}

} else {

// HTTP connection, Send message to other peers that we have this connection

if (parent.parent.multiServer != null) { parent.parent.multiServer.DispatchMessage(JSON.stringify({ action: 'relay', id: obj.id })); }

return;

}

}

}

// Websocket handling

if (obj.ws != null) {

// When data is received from the mesh relay web socket

obj.ws.on('message', function (data) {

if (this.res == null) { return; } // File download websocket does not have an HTTP peer, should not happen.

if (typeof data == 'string') {

var cmd = null;

try { cmd = JSON.parse(data); } catch (ex) { }

if ((cmd == null) || (typeof cmd.op == 'string')) {

if (cmd.op == 'ok') {

setContentDispositionHeader(this.res, 'application/octet-stream', this.file, cmd.size, 'file.bin');

} else {

try { this.res.sendStatus(401); } catch (ex) { }

}

}

} else {

var unpause = function unpauseFunc(err) { try { unpauseFunc.s.resume(); } catch (ex) { } }

unpause.s = this._socket;

this._socket.pause();

try { this.res.write(data, unpause); } catch (ex) { }

}

});

// If error, close both sides of the relay.

obj.ws.on('error', function (err) {

parent.relaySessionErrorCount++;

//console.log('FileRelay error from ' + obj.req.clientIp + ', ' + err.toString().split('\r')[0] + '.');

closeBothSides();

});

// If the relay web socket is closed, close both sides.

obj.ws.on('close', function (req) { closeBothSides(); });

}

}

// Close both our side and the peer side.

function closeBothSides() {

if (obj.relaySessionCounted) { parent.relaySessionCount--; delete obj.relaySessionCounted; }

if (obj.id != null) {

var relayinfo = parent.wsrelays[obj.id];

if (relayinfo != null) {

if (relayinfo.state == 2) {

var peer = (relayinfo.peer1 == obj) ? relayinfo.peer2 : relayinfo.peer1;

// Disconnect the peer

try { if (peer.relaySessionCounted) { parent.relaySessionCount--; delete peer.relaySessionCounted; } } catch (ex) { console.log(ex); }

parent.parent.debug('relay', 'FileRelay disconnect: ' + obj.id + ' (' + obj.req.clientIp + ' --> ' + peer.req.clientIp + ')');

if (peer.ws) { try { peer.ws.close(); } catch (e) { } try { peer.ws._socket._parent.end(); } catch (e) { } }

if (peer.res) { try { peer.res.end(); } catch (ex) { } }

// Aggressive peer cleanup

delete peer.id;

delete peer.ws;

delete peer.res;

delete peer.peer;

} else {

parent.parent.debug('relay', 'FileRelay disconnect: ' + obj.id + ' (' + obj.req.clientIp + ')');

}

if (obj.ws) { try { obj.ws.close(); } catch (ex) { } }

if (obj.res) { try { obj.res.end(); } catch (ex) { } }

delete parent.wsrelays[obj.id];

}

}

// Aggressive cleanup

delete obj.id;

delete obj.ws;

delete obj.res;

delete obj.peer;

}

// Mark this relay session as authenticated if this is the user end.

obj.authenticated = (user != null);

if (obj.authenticated) {

// Send connection request to agent

const rcookie = parent.parent.encodeCookie({ ruserid: user._id }, parent.parent.loginCookieEncryptionKey);

const command = { nodeid: nodeid, action: 'msg', type: 'tunnel', userid: user._id, value: '*/devicefile.ashx?id=' + obj.id + '&rauth=' + rcookie, soptions: {} };

parent.parent.debug('relay', 'FileRelay: Sending agent tunnel command: ' + JSON.stringify(command));

if (obj.sendAgentMessage(command, user, domain.id) == false) { delete obj.id; parent.parent.debug('relay', 'FileRelay: Unable to contact this agent (' + obj.req.clientIp + ')'); }

}

// Set the content disposition header for a HTTP response.

// Because the filename can't have any special characters in it, we need to be extra careful.

function setContentDispositionHeader(res, type, name, size, altname) {

if (name != null) { name = require('path').basename(name).split('\\').join('').split('/').join('').split(':').join('').split('*').join('').split('?').join('').split('"').join('').split('<').join('').split('>').join('').split('|').join('').split('\'').join(''); } else { name = altname; }

try {

var x = { 'Cache-Control': 'no-store', 'Content-Type': type, 'Content-Disposition': 'attachment; filename="' + encodeURIComponent(name) + '"' };

if (typeof size == 'number') { x['Content-Length'] = size; }

res.set(x);

} catch (ex) {

var x = { 'Cache-Control': 'no-store', 'Content-Type': type, 'Content-Disposition': 'attachment; filename="' + altname + '"' };

if (typeof size == 'number') { x['Content-Length'] = size; }

try { res.set(x); } catch (ex) { }

}

}

// If this is not an authenticated session, or the session does not have routing instructions, just go ahead an connect to existing session.

performRelay();

return obj;