| // |
| // sync_client.cpp |
| // ~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2021 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 <asio.hpp> |
| #include "socks4.hpp" |
| |
| using 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; |
| } |
| |
| 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); |
| 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").begin(); |
| |
| // Send the request to the SOCKS 4 server. |
| socks4::request socks_request( |
| socks4::request::connect, http_endpoint, argv[3]); |
| asio::write(socket, socks_request.buffers()); |
| |
| // Receive a response from the SOCKS 4 server. |
| socks4::reply socks_reply; |
| 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. |
| asio::write(socket, asio::buffer(request)); |
| |
| // Read until EOF, writing data to output as we go. |
| std::array<char, 512> response; |
| std::error_code error; |
| while (std::size_t s = socket.read_some( |
| asio::buffer(response), error)) |
| std::cout.write(response.data(), s); |
| if (error != asio::error::eof) |
| throw std::system_error(error); |
| } |
| catch (std::exception& e) |
| { |
| std::cout << "Exception: " << e.what() << "\n"; |
| } |
| |
| return 0; |
| } |