ip白名单 通过* ？ 检测IP匹配 轻量级

#include "stdafx.h"

#include <windows.h>

#include <string.h>

#include <assert.h>



 



const int maxCount = 100;

const int strMaxLen = 16;



 



 





BOOLEAN IsMatchPattern(const char* ipPattern,const char* ipChar)

{

 char* delims = ".";

 char* pPattern[4] = {0};

 char* pIp[4] = {0};

 char i = 0,j = 0;;

 char _ipPattern[strMaxLen] = {0};

 char _ipChar[strMaxLen] = {0};



 if( !ipPattern || !ipChar)

  return FALSE;



 // *字符前后只允许为.字符

 if('*' == ipPattern[0] && '.' != ipPattern[1])

  return FALSE;

 if( '*' == ipPattern[strlen(ipPattern)-1] && '.' != ipPattern[strlen(ipPattern)-2])

  return FALSE;

 for(i = 1;i < (strlen(ipPattern)-2);i++)

 {

  if( '*' == ipPattern[i])

   if( '.' != ipPattern[i-1] || '.' != ipPattern[i+1] )

    return FALSE;

  continue;

 }



 memcpy(_ipPattern,ipPattern,strlen(ipPattern));

 memcpy(_ipChar,ipChar,strlen(ipChar));





 pPattern[0] =strtok(_ipPattern,delims); 

 for(i = 1 ;i < 4;i++)

 {

  pPattern[i] =strtok(NULL,delims); 

 }



 pIp[0] =strtok(_ipChar,delims); 

 for(i = 1 ;i < 4;i++)

 {

  pIp[i] =strtok(NULL,delims); 

 }



 // 分解字符串检测 按'.'分成四个子字符串 每个字符串长度不超过3

 for(i = 0 ;i < 4;i++)

 {

  if(strlen(pPattern[i]) > 3)

   return FALSE;

 }



 for(i = 0 ;i < 4;i++)

 {

  if(strlen(pIp[i]) > 3)

   return FALSE;

 }



 



 // 检测字符串匹配 有*号则放过检测

  for(i = 0;i < 4;i++)

 {

  if( memcmp((void*)(pPattern[i]),"*",1) ==0 )

  {

   continue;

  }

  if( strlen(pPattern[i]) != strlen(pIp[i]) )

   return FALSE;

  for(j = 0;j < strlen(pPattern[i]);j++)

  {

   char* subchPattern = pPattern[i];

   char* subchIp = pIp[i];

   if(subchPattern[j] != '?' && subchPattern[j] != subchIp[j])

    return FALSE;

  }

 }



 return TRUE;

}



 





int _tmain(int argc, _TCHAR* argv[])

{

 char ipCheckPattern[strMaxLen] = "192.*.?2?.87";



 assert( FALSE == IsMatchPattern(ipCheckPattern,"192.168.1.99") );

 assert( FALSE == IsMatchPattern(ipCheckPattern,"192.168.272.87") );

 assert( TRUE == IsMatchPattern(ipCheckPattern,"192.168.120.87") );

 assert( TRUE == IsMatchPattern(ipCheckPattern,"192.122.223.87") );

 assert( FALSE == IsMatchPattern(ipCheckPattern,"172.19.66.87") );

 assert( FALSE == IsMatchPattern(ipCheckPattern,"172.0.0.87") );

 assert( TRUE == IsMatchPattern(ipCheckPattern,"192.178.129.87") );

 assert( FALSE == IsMatchPattern(ipCheckPattern,"192.212.17.71") );



 return 0;

}