W.T.F.

socks5.cpp

#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>

int main() {
	sockaddr_in proxyAddress;
	proxyAddress.sin_family = AF_INET;
	proxyAddress.sin_port = htons(9050);
	inet_aton("127.0.0.1", &proxyAddress.sin_addr);
	int proxy = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	connect(proxy, (struct sockaddr *)&proxyAddress, sizeof(proxyAddress));

	char buffer[256];
	buffer[0] = 5; // Socks5
	buffer[1] = 1; // 1 method auth
	buffer[2] = 0; // No auth
	send(proxy, buffer, 3, 0);
	recv(proxy, buffer, 2, 0);

	char *address = "google.fr";
	u_int16_t port = htons(80);

	buffer[0] = 5; // Socks5
	buffer[1] = 1; // Connect
	buffer[2] = 0;
	buffer[3] = 3; // 1- IPv4, 3- domain name, 4- IPv6
	ssize_t s = strlen(address);
	buffer[4] = s;
	memcpy(buffer + 5, address, s);
	ssize_t p = sizeof(port);
	memcpy(buffer + 5 + s, &port, p);

	send(proxy, buffer, 5+s+p, 0);
	recv(proxy, buffer, 256, 0);

	char *r = "GET / HTTP/1.1\r\n\r\n";
	_send(proxy, r, strlen(r), 0);
	_recv(proxy, buffer, 256, 0);

	shutdown(proxy, SHUT_RDWR);

	return 0;
}

socks5.rb

#!/usr/bin/env ruby
require 'socket'

def htons(h)
	[h].pack("S").unpack("n")[0]
end

socket = TCPSocket.new '127.0.0.1', 9050
socket.write [5, 1, 0].pack('CCC')
socket.recv 2

address = "google.fr"
port = htons 80
socket.write [5, 1, 0, 3, address.size, address, port].pack('CCCCCA*S')
socket.recv 256

socket.write "GET / HTTP/1.1\r\n\r\n"
socket.recv 256

socket.close