main.c

linux下实现拨号上网的源码

#include  <stdio.h>
#include <unistd.h>
#include  <sys/socket.h>
#include  <sys/types.h>
#include  <netinet/in.h>
#include  <math.h>
#include  <time.h>
#include  <string.h>

#include  "md5.h"  //md5加密函数


void  randomize () ;
void jiami(unsigned char *text,  char *str) ;


//常量定义
  char  S_IP[16] = "60.178.69.2" ; //服务器IP
  char  C_IP[16] = "10.254.118.80";  //客户端IP
  char  USER[16] = "034100548";  //用户名
  char  PASS[16] = "956540";   //密码
  char  SIGN[17] = "0123456789abcde7"  ;//签名




unsigned char  digest[16];  //16位随机数及其MD5，定义在外，方便使用。

char Random[17] ;

int  main()
{

	//初始化网络栈
//   WSADATA wsaData;
 //  WSAStartup(MAKEWORD(2,2), &wsaData);
   


   //cout<<"服务器:"<<S_IP<<endl;
   //cout<<"电信IP:"<<C_IP<<endl;
   //cout<<"用户名:"<<USER<<endl;
   //cout<<"密  码:"<<PASS<<endl;
    
   
    int i ;
    int  s;              //套接字句柄
   struct  sockaddr_in addr;      //地址
	char genbuf[1024] ;   //general buf for sending and recving  data 
    unsigned char user[33],pass[33],ip[33],sign[33];  //存放加密过的用户名和密码及ip,sign.
      
    char serial_number[17],key[17] ;
    srand(time(NULL));
    randomize();  //生成随机数及MD5;

    jiami((unsigned char *)USER,( char *)user);  //异或加密
	jiami((unsigned char *)C_IP,( char *)ip);
	jiami((unsigned char *)SIGN,( char *)sign);
	jiami((unsigned char *)PASS,( char *)pass);
   
	i = 217 + strlen(C_IP);//计算HTML表单的长度
    


	//构造 HTTP 数据包
	sprintf(genbuf,"POST /cgi-bin/client_login HTTP/1.1\r\n"
    "Accept: image/gif, application/x-shockwave-flash, application/vnd.ms-excel, application/msword, */*\r\n"
    "Accept-Language: zh-cn\r\n"
    "Content-Type: application/x-www-form-urlencoded\r\n"
    "Accept-Encoding: gzip, deflate\r\n"
    "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; (R1 1.5))\r\n"
    "Host: %s:81\r\n"         
    "Content-Length: %d\r\n"    
    "Connection: Keep-Alive\r\n"
    "Cache-Control: no-cache\r\n\r\n"

    "wlanacname=&wlanuserip=%s&user=%s&domain=&pass=%s&random=%s&sign=%s&command=0&ghj=%s\r\n\0"
	,S_IP
	,i
	,C_IP
	,user
	,pass
	,Random
	,sign
	,ip);



	addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = inet_addr(S_IP);
    addr.sin_port = htons(81);
	
	s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
    
	connect(s,(struct sockaddr *)&addr,sizeof(addr));
	
	send(s,genbuf,strlen(genbuf),0);
   
	i = recv(s,genbuf,1024,0);
	
        close(s);

    
	if(i)
	{
		*(genbuf+i) = '\0';
//	cout<<genbuf<<endl;
     printf("%s\n",genbuf);
	}

   //提取 serial_number
    char *ptr,*ptr2;
    ptr = strstr(genbuf,"ok;")+3;
    ptr = strstr(ptr,";");
	ptr++;
    ptr = strstr(ptr,";")+1;
    ptr2 = ptr;
	ptr = strstr(ptr,";");
    *ptr = '\0';
    strcpy(serial_number,ptr2);
//	cout<<serial_number<<endl;
 
    printf("%s\n",serial_number);


//====以上是登录部分

//====以下是登录完成后每隔30秒,发送一个数据包,以KEEP ALIVE 

	 addr.sin_port = htons(888); 
 	 s = socket(AF_INET,0,IPPROTO_UDP);
	 
         for(i=1;;i++)
	 {
	     sleep(30);
     	 randomize();
         jiami((unsigned char *)C_IP,( char *)ip);
         jiami((unsigned char *)SIGN,( char *)sign);
		 sprintf(key,"0;%d;\0\0",i);
		// cout<<key<<endl;
                 printf("%s",key);

         jiami((unsigned char *)key, ( char *)pass);
		
		 sprintf(genbuf,"%s;%s;%s;%s;%s;ghj;\0",
			      pass,ip,serial_number,Random,sign);
	//	cout<<genbuf<<endl;
        sendto(s,genbuf,strlen(genbuf)+1,0,(struct sockaddr *)&addr,sizeof(addr));
	//	cout<<genbuf<<endl;
	
     }

 
   //蚊换