9bb
Subj : Proxy Service Issues
To   : All
From : Drakmir
Date : Fri Oct 07 2005 10:56:00

  Re: Proxy Service Issues
  By: Drakmir to All on Thu Oct 06 2005 08:44 am

So, after working on it last night and with some hints from Digital Man, I've
come up with something that seems to work to proxy a socket. There is only one
unknown, and I've noticed that the use of "sendBin" seems to be what is
crashing my computer.  (If I use any number of bytes other that 4 it seems to
occasionaly crash).
 
The one sticky point is that when using "peek" or "read", sometimes you get a
string that is shorter than the number of bytes available to you.  The only
thing I can think of is that there is a embedded \0 character in the data
stream which C is then reading as the end of the string.  It would help to have
a read/write that dealt with the "string" we provide as a buffer instead.  I
assume this is true because doing:

socket.send("test\0test2"); only outputs "test".
 
Alan

-+- Code ---
load("sockdefs.js");    

function sendData(socketA, socketB)
{
    var bRetVal = false;
    var buf;
    
    if(socketA.data_waiting)
    {
        var numRead = socketA.nread;
        if (numRead > 512) numRead = 512;
        buf = socketA.peek(numRead);
        
        if (numRead != buf.length)
        {
            numRead = buf.length;
            buf = socketA.recv(numRead + 1);    // Not sure what we are
skipping here, but it seems harmless?  Maybe a zero?
            socketB.send(buf);
        }
      else
        {
            buf = socketA.recv(numRead);
            socketB.send(buf);
        }

        bRetVal = true;
    }
    
    return bRetVal;
}

try
{
    if (argc < 2)
    {
        throw("No parameters passed.");
    };

    var socket = new Socket();
    
    if(!socket.bind()) {
        throw("!bind error " + socket.last_error + "\r\n");
        exit();
    }
    
    var addr=argv[0];
    var port=argv[1];
    
    if(!socket.connect(addr,port)) {
        throw("!connect error " + socket.last_error + "\r\n");
        exit();
    }
    
    while(socket.is_connected && client.socket.is_connected) 
    {
        if (sendData(socket, client.socket)) continue;
        if (sendData(client.socket, socket)) continue;
        sleep(1);
    }
}
catch(E)
{
    log("Caught error - " + E);
    exit(-1);
}

exit(0);

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