linux中c语言和php语言通信代码UDP&TCP

linux中c语言和php语言通信代码UDP&TCP

http://blog.chinaunix.net/uid-24015214-id-2644174.html

UDP方式通信

 

服务器端server.c

 /*server.c*/
 #include <string.h>
 #include <stdio.h>
 #include <netinet/in.h>
 #include <stdlib.h>

 #define SERV_PORT 8000

 int main()
 {
      int sockfd,n,servaddr_len;
      char * server_ip = "127.0.0.1";
      char buf[];
      struct sockaddr_in server,client;

      sockfd = socket (AF_INET,SOCK_DGRAM,);

      bzero(&server,sizeof(server));
      server.sin_family = AF_INET;
      server.sin_addr.s_addr = inet_addr(server_ip);
      server.sin_port = htons(SERV_PORT);

      servaddr_len = sizeof(server);

      bind(sockfd,(struct sockaddr *) &server,servaddr_len);
      listen(sockfd,);
      while()
      {
         printf("等待读取数据.......\n");

         servaddr_len = sizeof(client);
         n = read(sockfd,buf,sizeof(buf));
         write(sockfd,buf,n);
         printf("读取的数据为:%s\n",buf);
         bzero(buf,sizeof(buf));
      }
      close(sockfd);
      return ;
 }

 

 

客户端client.php

 <?php
 $server_ip="127.0.0.1";
 $port = 8000;
 if($_POST['submit'])
 {
    $buf=trim($_POST['buf']);
    $sockfd=socket_create(AF_INET,SOCK_DGRAM,SOL_UDP)or die("创建失败");
    socket_connect($sockfd,$server_ip,$port)or die("连接错误");
    socket_write($sockfd,$buf,strlen($buf))or die("写入错误");

    socket_read($sockfd,$buf,80);
    echo $buf;
    $buf="";
    socket_close($sockfd);
 }
 ?>
 <form action="client.php" method="post">
 请选则发送方式：<br><input type=text name="buf">
 <input type=submit name="submit" value="发送">
 </form>

 

server.c文件通过gcc编译器编译

 

client.php通过浏览器运行

 

 

 

TCP方式

 

服务器端

 /*server.c*/
 #include <string.h>
 #include <stdio.h>
 #include <netinet/in.h>
 #include <stdlib.h>

 #define SERV_PORT 8000

 int main()
 {
    int sockfd,n,servaddr_len,client_len,connfd;
    char * server_ip = "127.0.0.1";
    char buf[];
    struct sockaddr_in server,client;

    sockfd = socket (AF_INET,SOCK_STREAM,);

    bzero(&server,sizeof(server));
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = inet_addr(server_ip);
    server.sin_port = htons(SERV_PORT);

    servaddr_len = sizeof(server);
    client_len=sizeof(client);

    bind(sockfd,(struct sockaddr *) &server,servaddr_len);
    listen(sockfd,);
    while()
    {
       bzero(buf,sizeof(buf));
       printf("等待读取数据.......\n");
       connfd=accept(sockfd,(struct sockaddr *)&client,&client_len);
       n = read(connfd,buf,sizeof(buf));
       // write(connfd,buf,n);
       printf("读取的数据为:%s\n",buf);

     }
     close(sockfd);
     return ;
 }

 

 

客户端

 <?php
 $server_ip="127.0.0.1";
 $port = 8000;
 if($_POST['submit'])
 {
     $buf=trim($_POST['buf']);
     $sockfd=socket_create(AF_INET,SOCK_STREAM,SOL_TCP)or die("创建失败");
     socket_connect($sockfd,$server_ip,$port)or die("连接错误");
     socket_write($sockfd,$buf,strlen($buf))or die("写入错误");

     $a=socket_read($sockfd,80);
     echo $a;
     $buf="";
     socket_close($sockfd);
 }
 ?>
 <form action="tcpclient.php" method="post">
 请选则发送方式：<br><input type=text name="buf">
 <input type=submit name="submit" value="发送">
 </form>

 

注意：1、tcp方式要设置安全级别及防火墙

    

       centOS5.4设置方法为：系统->管理->安全级别及防火墙->SElinux选项卡

                        设置为允许即可

     2、查看httpd_can_network_connect选项设置为on

       centOS5.4设置方法为：在终端执行setsebool httpd_can_network_connect on 即可

本人推荐使用第二种方法