linux下如何建监听

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

int main() {
    int server_socket, client_socket;
    struct sockaddr_in server_addr, client_addr;
    socklen_t addr_len = sizeof(client_addr);
    char buffer[1024];

    // 创建socket
    server_socket = socket(PF_INET, SOCK_STREAM, 0);
    if (server_socket == -1) {
        perror("socket");
        exit(1);
    }

    // 绑定地址和端口
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    server_addr.sin_port = htons(1234);

    if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
        perror("bind");
        close(server_socket);
        exit(1);
    }

    // 监听连接
    if (listen(server_socket, 5) == -1) {
        perror("listen");
        close(server_socket);
        exit(1);
    }

    printf("Server listening on port 1234...\n");

    while (1) {
        // 接受连接
        client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &addr_len);
        if (client_socket == -1) {
            perror("accept");
            continue;
        }

        // 读取数据
        read(client_socket, buffer, sizeof(buffer) - 1);
        buffer[read(client_socket, buffer, sizeof(buffer) - 1)] = '\0';
        printf("Received message: %s\n", buffer);

        // 发送响应
        write(client_socket, "Hello, client!", 18);

        // 关闭连接
        close(client_socket);
    }

    close(server_socket);
    return 0;
}