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;
}