[...]

void SendPositive(SOCKET to_sock, SOCKET about_sock)
{
	SOCKADDR_IN name;
	int len;
	BYTE Buffer[10] = {5, 0, 0, 1};

	len = sizeof(name);
	getsockname(about_sock, (SOCKADDR*)&name, &len);
	memcpy(&Buffer[4], &name.sin_addr.S_un.S_addr, 4);
	memcpy(&Buffer[8], &name.sin_port, 2);
	send(to_sock, Buffer, 10, 0);
}

[...]

	target_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	switch(Buffer[1])
	{
	case 1:
		puts("CONNECT");
		if(!connect(target_sock, (SOCKADDR*)&target_addr, sizeof(target_addr)))
		{
			SendPositive(sock, target_sock);
			SockToSock(sock, target_sock);
		}
		break;
	case 2:
		puts("BIND");
		if(bind(target_sock, (SOCKADDR*)&target_addr, sizeof(target_addr))
			&& listen(target_sock, 16))
		{

[...]