WindowsTCP消息通信（包括套接字中IP和端口读取方法）服务器和客户端的c代码

以下是一个简单的 Windows TCP 服务器和客户端的 C 代码示例：

服务器端代码：

#include <stdio.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
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        printf("WSAStartup failed.\n");
        return 1;
    }

    // 创建服务器套接字
    serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (serverSocket == INVALID_SOCKET) {
        printf("Failed to create server socket.\n");
        WSACleanup();
        return 1;
    }

    // 绑定服务器套接字到本地 IP 地址和指定端口
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = 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请求
    if (listen(serverSocket, SOMAXCONN) == SOCKET_ERROR) {
        printf("Failed to listen on server socket.\n");
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    printf("Server started, listening on port 12345...\n");

    // 接受客户端连接请求
    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 from %s:%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 > 0) {
        buffer[recvLen] = '\0';
        printf("Received message from client: %s\n", buffer);
    } else {
        printf("Failed to receive message from client.\n");
    }

    // 关闭套接字和清理 Winsock
    closesocket(clientSocket);
    closesocket(serverSocket);
    WSACleanup();

    return 0;
}

客户端代码：

#include <stdio.h>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

int main() {
    WSADATA wsaData;
    SOCKET clientSocket;
    struct sockaddr_in serverAddr;
    char buffer[1024];

    // 初始化 Winsock
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        printf("WSAStartup failed.\n");
        return 1;
    }

    // 创建客户端套接字
    clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (clientSocket == INVALID_SOCKET) {
        printf("Failed to create client socket.\n");
        WSACleanup();
        return 1;
    }

    // 连接到服务器
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    serverAddr.sin_port = htons(12345);
    if (connect(clientSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        printf("Failed to connect to server.\n");
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    printf("Connected to server.\n");

    // 发送数据到服务器
    const char* message = "Hello, server!";
    int sendLen = send(clientSocket, message, strlen(message), 0);
    if (sendLen == SOCKET_ERROR) {
        printf("Failed to send message to server.\n");
    } else {
        printf("Sent message to server: %s\n", message);
    }

    // 关闭套接字和清理 Winsock
    closesocket(clientSocket);
    WSACleanup();

    return 0;
}

这些代码演示了如何使用 Windows 套接字 API 创建一个简单的 TCP 服务器和客户端，并在它们之间发送消息。在服务器端，我们首先创建一个套接字并将其绑定到本地 IP 地址和指定端口，然后开始监听客户端连接请求。当客户端连接时，我们接受连接并接收客户端发送的消息。在客户端端，我们创建一个套接字并连接到服务器，然后发送一条消息。