c++ socket5代理源码
时间: 2023-08-10 15:01:35 浏览: 65
c socket5代理是一种实现代理服务器的网络协议,其源码可以用于建立网络连接的代理。下面是一个简单的c socket5代理的示例源码:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define BUFFER_SIZE 1024
void error(const char *msg) {
perror(msg);
exit(1);
}
int main() {
int serverSocket, clientSocket, targetSocket;
struct sockaddr_in serverAddr, clientAddr, targetAddr;
char buffer[BUFFER_SIZE];
// 创建代理服务器套接字
serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket < 0) {
error("Error opening proxy server socket.");
}
// 设置代理服务器地址
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(8080);
serverAddr.sin_addr.s_addr = INADDR_ANY;
// 绑定代理服务器套接字到指定地址
if (bind(serverSocket, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0) {
error("Error binding proxy server socket.");
}
// 监听代理服务器套接字
listen(serverSocket, 5);
printf("Proxy server is listening on port 8080...\n");
while (1) {
socklen_t clientLength = sizeof(clientAddr);
// 接受客户端连接
clientSocket = accept(serverSocket, (struct sockaddr *) &clientAddr, &clientLength);
if (clientSocket < 0) {
error("Error accepting client connection.");
}
printf("Accepted a client connection from %s:%d\n", inet_ntoa(clientAddr.sin_addr),
ntohs(clientAddr.sin_port));
// 连接目标主机
targetSocket = socket(AF_INET, SOCK_STREAM, 0);
if (targetSocket < 0) {
error("Error opening target host socket.");
}
targetAddr.sin_family = AF_INET;
targetAddr.sin_port = htons(80);
targetAddr.sin_addr.s_addr = inet_addr("192.168.1.1"); // 目标主机的IP地址
// 发起连接到目标主机
if (connect(targetSocket, (struct sockaddr *) &targetAddr, sizeof(targetAddr)) < 0) {
error("Error connecting to target host.");
}
// 在客户端和目标主机之间进行转发数据
ssize_t bytesRead;
while ((bytesRead = recv(clientSocket, buffer, sizeof(buffer), 0)) > 0) {
send(targetSocket, buffer, bytesRead, 0);
memset(buffer, 0, sizeof(buffer));
bytesRead = recv(targetSocket, buffer, sizeof(buffer), 0);
send(clientSocket, buffer, bytesRead, 0);
memset(buffer, 0, sizeof(buffer));
}
// 关闭连接
close(clientSocket);
close(targetSocket);
printf("Closed the client connection.\n");
}
// 关闭代理服务器套接字
close(serverSocket);
return 0;
}
```
以上是一个简单的c socket5代理的源码示例。它创建了一个代理服务器套接字,并在指定端口(8080)上监听客户端连接。当有客户端连接时,它会与目标主机建立连接,并转发客户端和目标主机之间的数据。请注意,该示例中的目标主机IP地址需要替换为实际目标主机的IP地址。