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[80];   
     struct sockaddr_in server,client;
 
 
 
 
 
     sockfd = socket (AF_INET,SOCK_DGRAM,0);
 
 
 
 
 
     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,6);
     while(1)
     {
        printf("等待读取数据.......
");
 
        servaddr_len = sizeof(client);      
        n = read(sockfd,buf,sizeof(buf));
        write(sockfd,buf,n);
        printf("读取的数据为:%s
",buf);
        bzero(buf,sizeof(buf));
     }                     
     close(sockfd);
     return 0;
}

 
 

 

 

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[80];   
   struct sockaddr_in server,client;
 
 
 
   sockfd = socket (AF_INET,SOCK_STREAM,0);
 
 
 
   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,6);
   while(1)
   {
      bzero(buf,sizeof(buf));
      printf("等待读取数据.......
");
      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
",buf);
  
    }                     
    close(sockfd);
    return 0;
}

 

 

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