Implementing IP Address retrieval with QQWry.Dat as data source [C #]

IP Address | data | Data source A few days ago, a friend said that he had always wanted to have such a program, can be more popular on the network QQwry.Dat as an IP data source to achieve the IP address query display. But the internet has never appeared. NET version of. I think so, then I will take time to write a good, first go to Google go a bit, find the relevant introduction article, understand its format, and then refer to the other language version of the program, a little more than a day, and finally this thing to write well. Dare not to enjoy the/**//******************************************************************.
* * File Name:IPScaner.cs
* * Copyright (c) 2004-2005 Pptech Studio (pptech.net)
* * CREATER:REXSP (msn:yubo@x263.net)
* * Create date:2004-12-27 20:10:28
* * Modifier:
* * Modify Date:
* * description:to Scan the IP location from Qqwry.dat
* * Version:ipscaner 1.0.0
******************************************************************/
Using System;
Using System.IO;
Using System.Collections;
Using System.Text;
Using System.Text.RegularExpressions;
Namespace PPTech.WebSite.BusinessRules
{
/**////<summary>
To scan the IP location from Qqwry.dat
</summary>
public class Ipscaner
{
Private member #region Private member
private string DataPath;
private string IP;
private string country;
private string Local;

Private long firststartip=0;
Private long laststartip=0;
Private FileStream OBJFS = null;
Private long startip=0;
Private long endip=0;
private int countryflag=0;
Private long endipoff=0;
private string Errmsg=null;
#endregion

constructor function #region Constructor
Public Ipscaner ()
{
//
TODO: Add constructor logic here
//
}
#endregion

Public Properties #region Public properties
public string DataPath
{
Set{datapath=value;}
}
public string IP
{
Set{ip=value;}
}
public string Country
{
Get{return Country;}
}
public string Local
{
Get{return Local;
}
public string ErrMsg
{
Get{return errmsg;}
}
#endregion

Search matching data #region search matching data
private int Qqwry ()
{
String pattern = @ "((\d{1,2}) | ( 1\D{2}) | (2[0-4]\d) | (25[0-5]) \.) {3} ((\d{1,2}) | (1\d{2}) | (2[0-4]\d) | (25[0-5])) ";
Regex objre = new regex (pattern);
Match Objma = Objre.match (IP);
if (!objma.success)
{
this.errmsg= "IP format error";
return 4;
}

Long Ip_int = this. Iptoint (IP);
int nret=0;
if (Ip_int>=iptoint ("127.0.0.0") &&ip_int<=iptoint ("127.255.255.255")
{
this.country= "native internal loopback address";
This.local= "";
Nret=1;
}
else if ((Ip_int>=iptoint ("0.0.0.0") &&ip_int<=iptoint ("2.255.255.255") | | (Ip_int>=iptoint ("64.0.0.0") &&ip_int<=iptoint ("126.255.255.255") | | (Ip_int>=iptoint ("58.0.0.0") &&ip_int<=iptoint ("60.255.255.255"))
{
this.country= "Network reservation Address";
This.local= "";
Nret=1;
}
OBJFS = new FileStream (This.datapath, FileMode.Open, FileAccess.Read);
Try
{
objFS. Seek (0,seekorigin.begin);
objFS. position=0;
byte[] buff = new Byte[8];
objFS. Read (buff,0,8);
firststartip=buff[0]+buff[1]*256+buff[2]*256*256+buff[3]*256*256*256;
laststartip=buff[4]*1+buff[5]*256+buff[6]*256*256+buff[7]*256*256*256;
Long Recordcount=convert.toint64 ((laststartip-firststartip)/7.0);
if (recordcount<=1)
{
country= "Filedataerror";
objFS. Close ();
return 2;
}
Long Range=recordcount;
Long rangb=0;
Long recno=0;
while (rangb<range-1)
{
recno= (RANGE+RANGB)/2;
This. Getstartip (RECNO);
if (Ip_int==this.startip)
{
RANGB = Recno;
Break
}
if (Ip_int>this.startip)
Rangb=recno;
Else
Range=recno;
}
This. Getstartip (RANGB);
This. Getendip ();
if (this.startip<=ip_int&&this.endip>=ip_int)
{
This. Getcountry ();
This.local=this.local.replace ("We must liberate Taiwan!!! ）","");
}
Else
{
nret=3;
this.country= "Unknown";
This.local= "";
}
objFS. Close ();
return nret;
}
Catch
{
return 1;
}

}
#endregion

Convert IP address to int data #region IP address to int data
Private long Iptoint (string IP)
{
char[] dot = new char[]{'. '};
string [] Iparr = IP. Split (dot);
if (iparr.length==3)
Ip=ip+ ". 0";
Iparr=ip. Split (dot);

Long ip_int=0;
Long P1=long. Parse (iparr[0]) *256*256*256;
Long P2=long. Parse (iparr[1]) *256*256;
Long P3=long. Parse (iparr[2]) *256;
Long P4=long. Parse (Iparr[3]);
IP_INT=P1+P2+P3+P4;
return ip_int;
}
#endregion

int converts to ip#region int to IP
private string Inttoip (long Ip_int)
{
Long seg1= (ip_int&0xff000000) >>24;
if (seg1<0)
seg1+=0x100;
Long seg2= (ip_int&0x00ff0000) >>16;
if (seg2<0)
seg2+=0x100;
Long seg3= (IP_INT&AMP;0X0000FF00) >>8;
if (seg3<0)
seg3+=0x100;
Long seg4= (IP_INT&AMP;0X000000FF);
if (seg4<0)
seg4+=0x100;
String IP=SEG1. ToString () + "." +SEG2. ToString () + "." +seg3. ToString () + "." +seg4. ToString ();

return IP;
}
#endregion

Get start IP range #region get start IP range
Private Long Getstartip (long recno)
{
Long offSet = firststartip+recno*7;
objFS. Seek (Offset,seekorigin.begin);
objFS. Position=offset;
byte [] buff = new BYTE[7];
objFS. Read (buff,0,7);

Endipoff=convert.toint64 (Buff[4]. ToString ()) +convert.toint64 (Buff[5]. ToString ()) *256+convert.toint64 (Buff[6]. ToString ()) *256*256;
Startip=convert.toint64 (Buff[0]. ToString ()) +convert.toint64 (Buff[1]. ToString ()) *256+convert.toint64 (buff[2]. ToString ()) *256*256+convert.toint64 (Buff[3]. ToString ()) *256*256*256;
return startip;
}
#endregion

Get end ip#region Get end IP
Private Long Getendip ()
{
objFS. Seek (Endipoff,seekorigin.begin);
objFS. Position=endipoff;
byte [] buff = new BYTE[5];
objFS. Read (buff,0,5);
This.endip=convert.toint64 (Buff[0]. ToString ()) +convert.toint64 (Buff[1]. ToString ()) *256+convert.toint64 (buff[2]. ToString ()) *256*256+convert.toint64 (Buff[3]. ToString ()) *256*256*256;
THIS.COUNTRYFLAG=BUFF[4];
return THIS.ENDIP;
}
#endregion

Get Country/region offset #region Get country/region offset
private String Getcountry ()
{
Switch (This.countryflag)
{
Case 1:
Case 2:
This.country=getflagstr (THIS.ENDIPOFF+4);
this.local= (1 = this.countryflag)? " ": this. Getflagstr (THIS.ENDIPOFF+8);
Break
Default
This.country=this. Getflagstr (THIS.ENDIPOFF+4);
This.local=this. Getflagstr (OBJFS. Position);
Break
}
Return "";
}
#endregion

Get country/region string #region Get country/region string
private string Getflagstr (long OffSet)
{
int flag=0;
byte [] buff = new BYTE[3];
while (1==1)
{
objFS. Seek (Offset,seekorigin.begin);
objFS. Position=offset;
Flag = objFS. ReadByte ();
if (flag==1| | flag==2)
{
objFS. Read (buff,0,3);
if (flag==2)
{
this.countryflag=2;
this.endipoff=offset-4;
}
Offset=convert.toint64 (Buff[0]. ToString ()) +convert.toint64 (Buff[1]. ToString ()) *256+convert.toint64 (buff[2]. ToString ()) *256*256;
}
Else
{
Break
}
}
if (offset<12)
Return "";
objFS. Position=offset;
return Getstr ();
}
#endregion

Getstr#region Getstr
private String Getstr ()
{
BYTE lowc=0;
BYTE upc=0;
String Str= "";
byte[] buff = new byte[2];
while (1==1)
{
Lowc= (Byte) objfs. ReadByte ();
if (lowc==0)
Break
if (lowc>127)
{
Upc= (Byte) objfs. ReadByte ();
BUFF[0]=LOWC;
BUFF[1]=UPC;
System.Text.Encoding enc = System.Text.Encoding.GetEncoding ("GB2312");
Str+=enc. GetString (Buff);
}
Else
{
str+= (char) LOWC;
}
}
return str;
}
#endregion

Get IP address #region get IP address
public string iplocation ()
{
This. Qqwry ();
return this.country+this.local;
}
public string iplocation (String datapath,string IP)
{
This.datapath=datapath;
This.ip=ip;
This. Qqwry ();
return this.country+this.local;
}
#endregion


}
}

Call Mode:
Test address search #region Test address search
Ipscaner Objscan = new Ipscaner ();
String ip= "221.224.205.13";
objscan.datapath=@ "e:\ personal Data \imtools\qqwryupdate\qqwry.dat";
Objscan.ip=ip;
String Addre=objscan.iplocation ();
String err=objscan.errmsg;

#endregion