Here’s an example of complete code that uses C++ with the Boost Asio library to create connections via SOCKS5. This code provides a basic structure for connecting to servers through SOCKS5, establishing asynchronous connections, and handling connections in a thread pool. Keep in mind that this code is a basic implementation and may require refinement for your specific requirements.
### Main Program Code
Code: Select all
#include <iostream>
#include <vector>
#include <array>
#include <thread>
#include <queue>
#include <boost/asio.hpp>
#include <boost/bind/bind.hpp>
using boost::asio::ip::tcp;
class Socks5Client {
public:
Socks5Client(boost::asio::io_context& io_context, const std::string& socks_ip, unsigned short socks_port,
const std::string& target_ip, unsigned short target_port)
: socket_(io_context),
socks_endpoint_(boost::asio::ip::make_address(socks_ip), socks_port),
target_endpoint_(boost::asio::ip::make_address(target_ip), target_port) {}
void start() {
socket_.async_connect(socks_endpoint_, boost::bind(&Socks5Client::handle_connect, this, boost::asio::placeholders::error));
}
private:
void handle_connect(const boost::system::error_code& error) {
if (!error) {
std::vector<uint8_t> auth_request = {0x05, 0x01, 0x00}; // SOCKS5, one method - no authentication
boost::asio::async_write(socket_, boost::asio::buffer(auth_request),
boost::bind(&Socks5Client::handle_auth_response, this, boost::asio::placeholders::error));
} else {
std::cerr << "Connect error: " << error.message() << std::endl;
}
}
void handle_auth_response(const boost::system::error_code& error) {
if (!error) {
std::array<uint8_t, 2> auth_response;
boost::asio::read(socket_, boost::asio::buffer(auth_response));
if (auth_response[1] == 0x00) { // Successful authentication
std::vector<uint8_t> connect_request = {
0x05, 0x01, 0x00, 0x01
};
auto ip_bytes = target_endpoint_.address().to_v4().to_bytes();
connect_request.insert(connect_request.end(), ip_bytes.begin(), ip_bytes.end());
connect_request.push_back(target_endpoint_.port() >> 8);
connect_request.push_back(target_endpoint_.port() & 0xFF);
boost::asio::async_write(socket_, boost::asio::buffer(connect_request),
boost::bind(&Socks5Client::handle_connect_response, this, boost::asio::placeholders::error));
} else {
std::cerr << "Authentication failed" << std::endl;
}
} else {
std::cerr << "Auth response error: " << error.message() << std::endl;
}
}
void handle_connect_response(const boost::system::error_code& error) {
if (!error) {
std::array<uint8_t, 10> connect_response;
boost::asio::read(socket_, boost::asio::buffer(connect_response));
if (connect_response[1] == 0x00) { // Successful connection
std::cout << "Connected to target through SOCKS5" << std::endl;
// Further data can be sent through the connection
} else {
std::cerr << "SOCKS5 connect failed" << std::endl;
}
} else {
std::cerr << "Connect response error: " << error.message() << std::endl;
}
}
tcp::socket socket_;
tcp::endpoint socks_endpoint_;
tcp::endpoint target_endpoint_;
};
void run_client(const std::string& socks_ip, unsigned short socks_port, const std::string& target_ip, unsigned short target_port) {
boost::asio::io_context io_context;
Socks5Client client(io_context, socks_ip, socks_port, target_ip, target_port);
client.start();
io_context.run();
}
int main() {
const std::string socks_ip = "127.0.0.1"; // SOCKS5 proxy IP
const unsigned short socks_port = 1080; // SOCKS5 proxy port
const std::string target_ip = "192.168.1.10"; // Target PC IP
const unsigned short target_port = 80; // Target PC port
std::vector<std::thread> thread_pool;
for (int i = 0; i < 5; ++i) { // Number of connections in the pool
thread_pool.emplace_back(run_client, socks_ip, socks_port, target_ip, target_port);
}
for (auto& thread : thread_pool) {
thread.join();
}
return 0;
}
### Code Explanation
1. **Socks5Client**: This class is responsible for creating a connection through SOCKS5. It implements the main stages:
- Connecting to the SOCKS5 server.
- Sending an authentication request.
- Sending a connection request to the target IP/port through SOCKS5.
- Handling the response from the SOCKS5 proxy server.
2. **Asynchronous Handling**: `async_connect`, `async_write`, and `async_read` are used to operate in a non-blocking manner.
3. **Thread Pool**: In the `main()` function, a pool of five threads is created, each running a separate `Socks5Client`. This allows simultaneous connections from multiple clients.
### Setup and Running
1. Ensure that the Boost Asio library is installed and linked to your project.
2. Change the `socks_ip`, `socks_port`, `target_ip`, and `target_port` variables in the `main()` function to your actual SOCKS5 server and target PC IP/port.
3. Compile and run the program.
This code serves as a basic example. For real applications, you may want to expand its logic to handle additional errors, optimize connection management, and add logging.