Windows 下用c语言写一个TCP服务器
时间: 2023-05-11 14:07:31 浏览: 77
可以使用Winsock库来实现一个TCP服务器。以下是一个简单的示例代码:
```
#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
int main() {
WSADATA wsaData;
SOCKET serverSocket, clientSocket;
struct sockaddr_in serverAddr, clientAddr;
int clientAddrLen = sizeof(clientAddr);
char buffer[1024];
// 初始化Winsock库
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
printf("WSAStartup failed!\n");
return 1;
}
// 创建服务器Socket
serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (serverSocket == INVALID_SOCKET) {
printf("Failed to create server socket!\n");
WSACleanup();
return 1;
}
// 绑定服务器Socket到本地IP和端口
serverAddr.sin_family = AF_INET;
serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
serverAddr.sin_port = htons(12345);
if (bind(serverSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
printf("Failed to bind server socket!\n");
closesocket(serverSocket);
WSACleanup();
return 1;
}
// 开始监听客户端连接
if (listen(serverSocket, SOMAXCONN) == SOCKET_ERROR) {
printf("Failed to listen on server socket!\n");
closesocket(serverSocket);
WSACleanup();
return 1;
}
printf("Server started, waiting for client connections...\n");
// 接受客户端连接
clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &clientAddrLen);
if (clientSocket == INVALID_SOCKET) {
printf("Failed to accept client connection!\n");
closesocket(serverSocket);
WSACleanup();
return 1;
}
printf("Client connected, IP address: %s, port: %d\n", inet_ntoa(clientAddr.sin_addr), ntohs(clientAddr.sin_port));
// 接收客户端发送的数据
int recvLen = recv(clientSocket, buffer, sizeof(buffer), 0);
if (recvLen == SOCKET_ERROR) {
printf("Failed to receive data from client!\n");
closesocket(clientSocket);
closesocket(serverSocket);
WSACleanup();
return 1;
}
printf("Received data from client: %s\n", buffer);
// 发送数据给客户端
const char* response = "Hello, client!";
int sendLen = send(clientSocket, response, strlen(response), 0);
if (sendLen == SOCKET_ERROR) {
printf("Failed to send data to client!\n");
closesocket(clientSocket);
closesocket(serverSocket);
WSACleanup();
return 1;
}
printf("Sent data to client: %s\n", response);
// 关闭Socket和Winsock库
closesocket(clientSocket);
closesocket(serverSocket);
WSACleanup();
return 0;
}
```
这个TCP服务器会监听本地IP地址的12345端口,当有客户端连接时,会接收客户端发送的数据,并发送一个简单的响应。