linux下socket网络编程怎样入门-乐工具技术知识

Linux下的Socket网络编程是一种在不同计算机之间进行通信的技术

学习基本概念：了解TCP/IP协议、网络编程的基本原理和流程。
学习Linux Socket编程API：熟悉Linux下的Socket编程相关函数，如socket()、bind()、listen()、accept()、connect()、send()、recv()等。
编写一个简单的TCP服务器和客户端：实现一个基本的TCP服务器和客户端，用于收发消息。这将帮助你更好地理解网络编程的工作原理。

以下是一个简单的TCP服务器和客户端示例：

服务器端代码（server.c）：

#include
#include 
#include
#include 
#include 
#include 
#include 

int main() {
    int server_fd, client_fd;
    struct sockaddr_in server_addr, client_addr;
    socklen_t client_addr_size;
    char buffer[1024];

    server_fd = socket(AF_INET, SOCK_STREAM, 0);
    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(8080);

    bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr));
    listen(server_fd, 5);

    client_addr_size = sizeof(client_addr);
    client_fd = accept(server_fd, (struct sockaddr *)&client_addr, &client_addr_size);

    read(client_fd, buffer, sizeof(buffer));
    printf("Received message: %s\n", buffer);

    send(client_fd, "Hello from server!", strlen("Hello from server!"), 0);

    close(client_fd);
    close(server_fd);

    return 0;
}

客户端代码（client.c）：

#include
#include 
#include
#include 
#include 
#include 
#include 

int main() {
    int client_fd;
    struct sockaddr_in server_addr;
    char buffer[1024];

    client_fd = socket(AF_INET, SOCK_STREAM, 0);
    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(8080);

    connect(client_fd, (struct sockaddr *)&server_addr, sizeof(server_addr));

    send(client_fd, "Hello from client!", strlen("Hello from client!"), 0);

    read(client_fd, buffer, sizeof(buffer));
    printf("Received message: %s\n", buffer);

    close(client_fd);

    return 0;
}