[linux] C语言Linux系统编程-socket回声客户端

发布时间：2020-12-13 14:17:37 所属栏目：Linux 来源：网络整理

导读：回声客户端： 1. 2. #define BUF_SIZE 100 1.# 2.#define scanf("%s",bufSend); 1.scanf() 2. div class="cnblogs_code" #include .h> .h> BUF_SIZE 100 serv_sock = serv_addr, , (serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr

回声客户端：

#define BUF_SIZE 100

1.#

2.#define

scanf("%s",bufSend);

1.scanf()

#include <.h>.h>
 BUF_SIZE 100

         serv_sock =
        &serv_addr,,(serv_addr));  
        serv_addr.sin_family = AF_INET;  
        serv_addr.sin_addr.s_addr = inet_addr();  
        serv_addr.sin_port = htons();  
        bind(serv_sock,( sockaddr*)&serv_addr,
        listen(serv_sock,
        =  clnt_sock = accept(serv_sock,( sockaddr*)&clnt_addr,&    </span><span style="color: #0000ff"&gt;char</span> buffer[BUF_SIZE];  <span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;缓冲区</span>
    <span style="color: #0000ff"&gt;int</span> strLen = read(clnt_sock,buffer,BUF_SIZE);  <span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;接收客户端发来的数据</span>
    write(clnt_sock,<span style="color: #0000ff"&gt;sizeof</span><span style="color: #000000"&gt;(buffer));
    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;关闭套接字</span>

close(clnt_sock);
close(serv_sock);
return 0;
}

echo_client.c

#include <.h> BUF_SIZE 100 sock = socket(AF_INET, &serv_addr,(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = inet_addr(); serv_addr.sin_port = htons(); connect(sock,

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;回声客户端</span>
    <span style="color: #0000ff"&gt;char</span><span style="color: #000000"&gt; bufSend[BUF_SIZE];
    printf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;输入字符串: </span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);
    scanf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;%s</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;,bufSend);
    write(sock,bufSend,</span><span style="color: #0000ff"&gt;sizeof</span><span style="color: #000000"&gt;(bufSend));

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;读取服务器传回的数据</span>
    <span style="color: #0000ff"&gt;char</span> buffer[<span style="color: #800080"&gt;40</span><span style="color: #000000"&gt;];
    read(sock,</span><span style="color: #0000ff"&gt;sizeof</span>(buffer)-<span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;);

    printf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;服务器返回: %sn</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;,buffer);

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;关闭套接字</span>

close(sock);
return 0;
}

效果：

使用while(1) 让代码进入死循环，一直监听客户端的请求

echo_server.c

( clnt_sock = accept(serv_sock,&

            </span><span style="color: #0000ff"&gt;char</span> buffer[BUF_SIZE];  <span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;缓冲区</span>
            <span style="color: #0000ff"&gt;int</span> strLen = read(clnt_sock,BUF_SIZE);  <span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;接收客户端发来的数</span>

据
write(clnt_sock,sizeof(buffer));
//关闭套接字
 close(clnt_sock);
}

echo_client.c

( sock = socket(AF_INET, &serv_addr,(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = inet_addr(); serv_addr.sin_port = htons(); connect(sock,

            </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;回声客户端</span>
            <span style="color: #0000ff"&gt;char</span><span style="color: #000000"&gt; bufSend[BUF_SIZE];
            printf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;输入字符串: </span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);
            scanf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;%s</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;,bufSend);
            write(sock,</span><span style="color: #0000ff"&gt;sizeof</span><span style="color: #000000"&gt;(bufSend));

            </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;读取服务器传回的数据</span>
            <span style="color: #0000ff"&gt;char</span> buffer[<span style="color: #800080"&gt;40</span><span style="color: #000000"&gt;];
            read(sock,</span><span style="color: #0000ff"&gt;sizeof</span>(buffer)-<span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;);

            printf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;服务器返回: %sn</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;,buffer);

            </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;关闭套接字</span>
            close(sock);}</pre>

?效果：

（编辑：李大同）

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