Windows下的TCP/IP实例

1.注意事项

windows下winsock.h/winsock2.h
linux下sys/socket.h
不同平台头文件不一样
#include <winsock.h> 或者 #include <winsock2.h>

2. 安装minGW

目标是在 Windows 环境下提供类似于 Unix/Linux 环境下的开发工具，使开发者能够轻松地在 Windows 上编写和编译 C、C++ 等程序。
安装参考链接

3. 代码

说明：只有一个电脑，创建进程测试的。代码保存成server.cpp，最后运行

g++ serve.cpp -lws2_32

serve.cpp

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <windows.h>#pragma comment(lib, "ws2_32.lib")#define PORT 8888
#define MAX_CONNECTIONS 5
//windows下winsock.h/winsock2.h 
//linux下sys/socket.h
//不同平台头文件不一样
//#include <winsock.h> 或者 #include <winsock2.h>
//<arpa/inet.h>用<windows.h>代替DWORD WINAPI serverThread(LPVOID lpParam) {SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, 0);struct sockaddr_in serverAddr;serverAddr.sin_family = AF_INET;serverAddr.sin_port = htons(PORT);serverAddr.sin_addr.s_addr = INADDR_ANY;bind(serverSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr));listen(serverSocket, MAX_CONNECTIONS);printf("Server listening on port %d\n", PORT);struct sockaddr_in clientAddr;int clientAddrLen = sizeof(clientAddr);SOCKET clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &clientAddrLen);while (1) {char buffer[1024] = {0};recv(clientSocket, buffer, 1024, 0);printf("Received message from client: %s\n", buffer);send(clientSocket, "Message received.\n", strlen("Message received"), 0);if (strcmp(buffer, "serve_exit\n") == 0) {break;}}closesocket(clientSocket);closesocket(serverSocket);return 0;
}int main() {WSADATA wsaData;WSAStartup(MAKEWORD(2, 2), &wsaData);HANDLE serverThreadHandle = CreateThread(NULL, 0, serverThread, NULL, 0, NULL);Sleep(100); // 等待服务器线程启动SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, 0);struct sockaddr_in serverAddr;serverAddr.sin_family = AF_INET;serverAddr.sin_port = htons(PORT);serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");connect(clientSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr));char message[1024];while (1) {printf("Enter message: ");fgets(message, 1024, stdin);send(clientSocket, message, strlen(message), 0);if (strcmp(message, "exit\n") == 0) {break;}char buffer[1024] = {0};recv(clientSocket, buffer, 1024, 0);printf("Server says: %s", buffer);}closesocket(clientSocket);CloseHandle(serverThreadHandle);WSACleanup();return 0;
}