Accessing socket object after disconnect

The following is a simple Node.js tcp server.

var net = require('net');

var conn = [];

var server = net.createServer(function(client) {//'connection' listener
    var i = conn.push(client) - 1;
    //console.log('[conn',i,']', client.remoteAddress, ':', client.remotePort);
    console.log('[disc]', conn[i].remoteAddress, ':', conn[i].remotePort);

    client.on('end', function() {
        console.log('[disc]', conn[i].remoteAddress, ':', conn[i].remotePort);
    });

    client.on('data', function(msg) {
        console.log('[data]', msg.toString());
    })

    client.write('hello\r\n');
    //client.pipe(client);
});

server.listen(8080);

When a client connects, sends, or disconnects, it will print information about the client. However, only when the client disconnects, it prints undefined rather than the socket info. Example:

[conn] 127.0.0.1 : 52711
[data] 127.0.0.1 : 52711 world!
[disc] undefined : undefined

Why does this happen? Is this because when it is closed the socket is destroyed? I need to know the information regarding the closing socket.