如何用c++语言写个简单socket服务端

更新时间：2023-12-19 15:39:43 作者：肥宅-季波我要评论(0)

一个使用C++语言编写的简单的Socket服务端示例：

#include <iostream>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <cstring>
int main()
{
int serverSocket, clientSocket;
struct sockaddr_in serverAddr, clientAddr;
// 创建套接字
serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket == -1) {
std::cerr << "Failed to create socket." << std::endl;
return 1;
}
// 设置服务器地址
serverAddr.sin_family = AF_INET;
serverAddr.sin_addr.s_addr = INADDR_ANY;
serverAddr.sin_port = htons(8080); // 使用8080端口
// 绑定套接字
if (bind(serverSocket, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) == -1) {
std::cerr << "Failed to bind socket." << std::endl;
return 1;
}
// 监听连接
if (listen(serverSocket, 3) == -1) {
std::cerr << "Failed to listen." << std::endl;
return 1;
}
std::cout << "Server running. Waiting for connections..." << std::endl;
socklen_t addrSize = sizeof(struct sockaddr_in);
// 接受连接
clientSocket = accept(serverSocket, (struct sockaddr *) &clientAddr, &addrSize);
if (clientSocket == -1) {
std::cerr << "Failed to accept connection." << std::endl;
return 1;
}
char buffer[1024];
memset(buffer, 0, sizeof(buffer));
// 从客户端接收数据
ssize_t bytesRead = read(clientSocket, buffer, sizeof(buffer) - 1);
if (bytesRead == -1) {
std::cerr << "Failed to read data from socket." << std::endl;
return 1;
}
std::cout << "Received message: " << buffer << std::endl;
// 发送响应给客户端
const char *response = "Hello from server!";
ssize_t bytesSent = write(clientSocket, response, strlen(response));
if (bytesSent == -1) {
std::cerr << "Failed to send response." << std::endl;
return 1;
}
// 关闭套接字
close(clientSocket);
close(serverSocket);
return 0;
}