ubuntu系统下socket编程

在Ubuntu系统下进行socket编程，需要使用C语言中的socket编程接口。以下是一个简单的示例代码：

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

int main()
{
    int socket_desc, client_sock, c, read_size;
    struct sockaddr_in server, client;
    char client_message[2000];
    
    // 创建socket
    socket_desc = socket(AF_INET, SOCK_STREAM, 0);
    if (socket_desc == -1)
    {
        printf("Could not create socket");
    }
    
    // 绑定IP地址和端口号
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = INADDR_ANY;
    server.sin_port = htons(8888);
    if (bind(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0)
    {
        printf("bind failed");
        return 1;
    }
    printf("bind done");
    
    // 监听连接
    listen(socket_desc, 3);
    
    // 等待连接
    printf("Waiting for incoming connections...\n");
    c = sizeof(struct sockaddr_in);
    client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c);
    if (client_sock < 0)
    {
        printf("accept failed");
        return 1;
    }
    printf("Connection accepted");
    
    // 接收客户端消息并回复
    while ((read_size = recv(client_sock, client_message, 2000, 0)) > 0)
    {
        printf("Received message: %s\n", client_message);
        write(client_sock, client_message, strlen(client_message));
        memset(client_message, 0, 2000);
    }
    
    if (read_size == 0)
    {
        printf("Client disconnected");
    }
    else if (read_size == -1)
    {
        printf("recv failed");
    }
    
    return 0;
}

这是一个简单的TCP服务器示例代码，它监听本地IP地址的8888端口，等待客户端连接请求。当客户端连接成功后，服务器会接收客户端发送的消息，并回复同样的消息。