linux socket5怎样进行通信

在Linux中，Socket 5实际上是一个基于TCP/IP协议族的socket编程接口

服务器端：

#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>

#define PORT 12345
#define BUFFER_SIZE 1024

int main() {
    int server_fd, client_fd, addr_len;
    struct sockaddr_in server_addr, client_addr;
    char buffer[BUFFER_SIZE];

    // 创建socket
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // 配置服务器地址
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_port = htons(PORT);

    // 绑定socket
    if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // 监听连接
    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    addr_len = sizeof(client_addr);

    // 接受客户端连接
    if ((client_fd = accept(server_fd, (struct sockaddr *)&client_addr, (socklen_t *)&addr_len)) < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }

    // 读取并输出客户端发送的数据
    read(client_fd, buffer, BUFFER_SIZE);
    printf("Message from client: %s\n", buffer);

    // 向客户端发送数据
    send(client_fd, "Hello from server!", strlen("Hello from server!"), 0);
    printf("Message sent to client\n");

    // 关闭socket
    close(client_fd);
    close(server_fd);

    return 0;
}

客户端：

#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>

#define PORT 12345
#define SERVER_IP "127.0.0.1"
#define BUFFER_SIZE 1024

int main() {
    int client_fd;
    struct sockaddr_in server_addr;
    char buffer[BUFFER_SIZE] = {0};

    // 创建socket
    if ((client_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // 配置服务器地址
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);

    if (inet_pton(AF_INET, SERVER_IP, &server_addr.sin_addr) <= 0) {
        perror("inet_pton");
        exit(EXIT_FAILURE);
    }

    // 连接到服务器
    if (connect(client_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("connect");
        exit(EXIT_FAILURE);
    }

    // 向服务器发送数据
    send(client_fd, "Hello from client!", strlen("Hello from client!"), 0);
    printf("Message sent to server\n");

    // 读取并输出服务器发送的数据
    read(client_fd, buffer, BUFFER_SIZE);
    printf("Message from server: %s\n", buffer);

    // 关闭socket
    close(client_fd);

    return 0;
}

编译并运行这两个程序，首先启动服务器，然后启动客户端。服务器将接收到客户端发送的消息，并向客户端发送回复。客户端收到服务器的回复后，结束通信。

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