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- //
- // sync_client.cpp
- // ~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <array>
- #include <iostream>
- #include <iomanip>
- #include <ostream>
- #include <string>
- #include <boost/asio.hpp>
- #include "socks4.hpp"
- using boost::asio::ip::tcp;
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 4)
- {
- std::cout << "Usage: sync_client <socks4server> <socks4port> <user>\n";
- std::cout << "Examples:\n";
- std::cout << " sync_client 127.0.0.1 1080 chris\n";
- std::cout << " sync_client localhost socks chris\n";
- return 1;
- }
- boost::asio::io_context io_context;
- // Get a list of endpoints corresponding to the SOCKS 4 server name.
- tcp::resolver resolver(io_context);
- auto endpoints = resolver.resolve(argv[1], argv[2]);
- // Try each endpoint until we successfully establish a connection to the
- // SOCKS 4 server.
- tcp::socket socket(io_context);
- boost::asio::connect(socket, endpoints);
- // Get an endpoint for the Boost website. This will be passed to the SOCKS
- // 4 server. Explicitly specify IPv4 since SOCKS 4 does not support IPv6.
- auto http_endpoint = *resolver.resolve(tcp::v4(), "www.boost.org", "http");
- // Send the request to the SOCKS 4 server.
- socks4::request socks_request(
- socks4::request::connect, http_endpoint, argv[3]);
- boost::asio::write(socket, socks_request.buffers());
- // Receive a response from the SOCKS 4 server.
- socks4::reply socks_reply;
- boost::asio::read(socket, socks_reply.buffers());
- // Check whether we successfully negotiated with the SOCKS 4 server.
- if (!socks_reply.success())
- {
- std::cout << "Connection failed.\n";
- std::cout << "status = 0x" << std::hex << socks_reply.status();
- return 1;
- }
- // Form the HTTP request. We specify the "Connection: close" header so that
- // the server will close the socket after transmitting the response. This
- // will allow us to treat all data up until the EOF as the response.
- std::string request =
- "GET / HTTP/1.0\r\n"
- "Host: www.boost.org\r\n"
- "Accept: */*\r\n"
- "Connection: close\r\n\r\n";
- // Send the HTTP request.
- boost::asio::write(socket, boost::asio::buffer(request));
- // Read until EOF, writing data to output as we go.
- std::array<char, 512> response;
- boost::system::error_code error;
- while (std::size_t s = socket.read_some(
- boost::asio::buffer(response), error))
- std::cout.write(response.data(), s);
- if (error != boost::asio::error::eof)
- throw std::system_error(error);
- }
- catch (std::exception& e)
- {
- std::cout << "Exception: " << e.what() << "\n";
- }
- return 0;
- }
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