基于TCP的回声服务器端/客户端

server.c

#define _WINSOCK_DEPRECATED_NO_WARNINGS

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

int main()
{
    WSADATA wsadata;
    WSAStartup(MAKEWORD(2, 2), &wsadata);

    SOCKET server_socket = socket(AF_INET, SOCK_STREAM, 0);

    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    server_addr.sin_port = htons(1234);
    
    bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr));

    listen(server_socket, 20);
    char Buff[1024];
    SOCKADDR client_addr;
    memset(&client_addr, 0, sizeof(client_addr));
    int nsize = sizeof(client_addr);

    while (1)
    {
        SOCKET add_sock = accept(server_socket, (SOCKADDR*)&client_addr, &nsize);
        int len = recv(add_sock, Buff, 1024, 0);
        Buff[len] = '\0';
        printf("收到数据：%s\n",Buff);
        send(add_sock, Buff, strlen(Buff), 0);

        closesocket(add_sock);
    }

    closesocket(server_socket);
    WSACleanup();
    return 0;
}

client.c

#define _CRT_SECURE_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include
#include
#include
#include
#pragma comment(lib,"ws2_32.lib")

int main()
{
    WSADATA wsadata;
    WSAStartup(MAKEWORD(2, 2), &wsadata);

    SOCKADDR_IN server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    server_addr.sin_port = htons(1234);

    while (1)
    {
        SOCKET client_sock = socket(AF_INET, SOCK_STREAM, 0);
        connect(client_sock, (SOCKADDR*)&server_addr, sizeof(server_addr));

        char Buff[1024];
        printf("请输入发送的消息：");
        scanf("%s", Buff);
        send(client_sock, Buff, strlen(Buff), 0);

        memset(Buff, 0, 1024);
        int len = recv(client_sock, Buff, 1024, 0);
        Buff[len] = '\0';
        printf("收到的数据:%s\n",Buff);
        closesocket(client_sock);
    }
    WSACleanup();
    return 0;
}