Help with sockets

[tpe]

Hi,
I need to open a non standard TCP (high) port though a proxy server in order to connect via company's proxy server to another server. The proxy is Squid, but allows traffic to the specific port we need to access.
How can I open the socket from my C program in order to connect via the proxy server? My suspicion is to use 2 connections, one to the proxy server and then to the target server. If that is correct, how can I do that?
Cheers,
Peter

[itsme86]

It should just be one connection to the proxy server. The proxy server in turn will contact the target server for you.

[tpe]

open_stream (const char *host, unsigned int  port)
{
	struct addrinfo *res, *addr, hints;
	static char      service[6];
	int              sock, ret;

	sprintf (service, "%hu", port);

	memset (&hints, 0, sizeof (hints));
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_flags = AI_CANONNAME;

	ret = getaddrinfo (hostname, service, &hints, &res);
	if (ret != 0) {
		return -1;
	}
        sock = -1;
	for (addr = res; addr; addr = addr->ai_next) {
		sock = socket (addr->ai_family, addr->ai_socktype, addr->ai_protocol);

This is the code in question. Now, if I open the stream to the proxy server, then, how will I instruct the proxy to open a connection to the target server? The socket to the proxy server, is pretty simple. But from then on, I have no clue on how to continue...