linux socket5怎樣進行通信

在Linux中，Socket 5實際上是一個基于TCP/IP協議族的socket編程接口

1. 服務器端：

#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];

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

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

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

    // 監聽連接
    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    addr_len = sizeof(client_addr);

    // 接受客戶端連接
    if ((client_fd = accept(server_fd, (struct sockaddr *)&client_addr, (socklen_t *)&addr_len)) < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }

    // 讀取并輸出客戶端發送的數據
    read(client_fd, buffer, BUFFER_SIZE);
    printf("Message from client: %s\n", buffer);

    // 向客戶端發送數據
    send(client_fd, "Hello from server!", strlen("Hello from server!"), 0);
    printf("Message sent to client\n");

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

    return 0;
}

2. 客戶端：

#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};

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

    // 配置服務器地址
    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);
    }

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

    // 向服務器發送數據
    send(client_fd, "Hello from client!", strlen("Hello from client!"), 0);
    printf("Message sent to server\n");

    // 讀取并輸出服務器發送的數據
    read(client_fd, buffer, BUFFER_SIZE);
    printf("Message from server: %s\n", buffer);

    // 關閉socket
    close(client_fd);

    return 0;
}

編譯并運行這兩個程序，首先啟動服務器，然后啟動客戶端。服務器將接收到客戶端發送的消息，并向客戶端發送回復?？蛻舳耸盏椒掌鞯幕貜秃?，結束通信。