socks4 server

apsync · 07-30-2005, 10:42 AM

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

**Salem** · 07-30-2005, 11:23 AM

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

apsync · 07-30-2005, 01:59 PM

oh, and and how should i initialise it

**Salem** · 07-30-2005, 02:08 PM

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

apsync · 07-30-2005, 02:12 PM

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

Code:

DWORD WINAPI Socks4ClientThread(LPVOID pParam)

and

Code:

SOCKET client=(SOCKET)pParam;

but how should I call the function now,

Code:

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

**Salem** · 07-30-2005, 02:16 PM

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.

apsync · 07-30-2005, 02:45 PM

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

Code:

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

any ideas what it can be?

nkhambal · 07-30-2005, 07:27 PM

Quote:

Originally Posted by apsync

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

Code:

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

any ideas what it can be?

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:

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;
}

apsync · 07-31-2005, 01:52 AM

ah I see, thanks, now I can continue!

apsync · 07-31-2005, 04:53 AM

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

07-30-2005, 10:42 AM	#1
apsync Registered User Join Date: Dec 2004 Location: The Netherlands Posts: 89	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 Last edited by apsync; 07-30-2005 at 02:13 PM.
apsync is offline

07-30-2005, 11:23 AM	#2
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,700	http://www.mailsbroadcast.com/email....rror.codes.htm Considering that the client variable in Socks4ClientThread is uninitialised, I'm surprised it gets that far __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

07-30-2005, 01:59 PM	#3
apsync Registered User Join Date: Dec 2004 Location: The Netherlands Posts: 89	oh, and and how should i initialise it Last edited by apsync; 07-30-2005 at 02:03 PM.
apsync is offline

07-30-2005, 02:08 PM	#4
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,700	I'd have said pass it as a parameter from one function to another. __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

07-30-2005, 02:12 PM	#5
apsync Registered User Join Date: Dec 2004 Location: The Netherlands Posts: 89	allright, thanks for replying, i did the following now; Code: DWORD WINAPI Socks4ClientThread(LPVOID pParam) and Code: SOCKET client=(SOCKET)pParam; but how should I call the function now, Code: Socks4ClientThread("something"); // I dunno what i have to fill here
apsync is offline

07-30-2005, 02:16 PM	#6
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,700	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. __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

07-31-2005, 01:52 AM	#9
apsync Registered User Join Date: Dec 2004 Location: The Netherlands Posts: 89	ah I see, thanks, now I can continue!
apsync is offline

07-31-2005, 04:53 AM	#10
apsync Registered User Join Date: Dec 2004 Location: The Netherlands Posts: 89	hmm not working, what can I do to receive the SYN-ACK packet from server
apsync is offline

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