socks4 server

hello i am trying to make a socks4 server for windows(xp) using ms-vc++6.
it works fine untill the recv() part,
there, it returns error code 10038 (WSAGetLastError),
can someone take a look at my code plz

http://www.mailsbroadcast.com/email....rror.codes.htm
Considering that the client variable in Socks4ClientThread is uninitialised, I'm surprised it gets that far

oh, and and how should i initialise it

I'd have said pass it as a parameter from one function to another.

allright, thanks for replying, i did the following now;

Code:

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DWORD WINAPI Socks4ClientThread(LPVOID pParam)

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and

Code:

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SOCKET client=(SOCKET)pParam;

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but how should I call the function now,

Code:

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Socks4ClientThread("something"); // I dunno what i have to fill here

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Since you're not actually using threads or anything (despite the names), and just calling functions directly, you may as well have

void Socks4ClientThread(SOCKET client); // prototype

Socks4ClientThread(client); // call


void Socks4ClientThread(SOCKET client) // definition

And lose the local variable of the same name in that function.

thanks everything looks fine now, but for some reason it hangs at this line

Code:

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if (connect(outbound, (SOCKADDR *)&target_in, sizeof(target_in)) == SOCKET_ERROR)

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any ideas what it can be?

Quote:

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Originally Posted by apsync

thanks everything looks fine now, but for some reason it hangs at this line

Code:

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if (connect(outbound, (SOCKADDR *)&target_in, sizeof(target_in)) == SOCKET_ERROR)

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any ideas what it can be?

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It is not hanging. Probably the server to which you are trying to connect, is not running. connect() has sent the SYN and waiting for SYN-ACK from server. If it does not receive SYN-ACK from server till the SYN timout period, it will return with error. The timeout period is different on different platforms. Like on linux/bsd it is 72 secs usually. You can change the socket timeout using setsockopt()

Here is one way to do it

Code:

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void setsockettimeout()
{
        struct timeval tv;

        tv.tv_sec = 30; /* timeout in 30 Secs */

        setsockopt(sockid, SOL_SOCKET, SO_SNDTIMEO,(struct timeval *)&tv,sizeof(struct timeval));
        setsockopt(sockid, SOL_SOCKET, SO_RCVTIMEO,(struct timeval *)&tv,sizeof(struct timeval));

        return;
}

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ah I see, thanks, now I can continue!

hmm not working, what can I do to receive the SYN-ACK packet from server