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tcp socket localPort option does not work #15084

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@beingmohit

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@beingmohit

Version: v6.11.2
Platform: Linux workstation 4.4.0-92-generic #115-Ubuntu SMP Thu Aug 10 09:04:33 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Subsystem: net

const net = require('net');

function createServer(port) {
    var server = net.createServer();

    server.on('connection', (socket) => {
        console.log('Server '+port+': socket connected',  socket.remotePort);
    });

    server.listen(port);
}

createServer(6001);
createServer(6002);

var client =  new net.Socket();

client.connect({
    port: 6001,
    address: '::ffff:127.0.0.1',
    localPort: 6002
});

Output: Server 6001: socket connected 35372
Expected: Server 6001: socket connected 6002 (or EADDRINUSE error)

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