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IPScanner.cs public class IPScanner { private byte[] data; Regex regex = new Regex(@"(((\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]))"); long firstStartIpOffset; long lastStartIpOffset; long ipCount; public long Count { get { return ipCount; } } public IPScanner(string dataPath) { using (FileStream fs = new FileStream(dataPath, FileMode.Open, FileAccess.Read, FileShare.Read)) { data = new byte[fs.Length]; fs.Read(data, 0, data.Length); } byte[] buffer = new byte[8]; Array.Copy(data, 0, buffer, 0, 8); firstStartIpOffset = ((buffer[0] + (buffer[1] * 0x100)) + ((buffer[2] * 0x100) * 0x100)) + (((buffer[3] * 0x100) * 0x100) * 0x100); lastStartIpOffset = ((buffer[4] + (buffer[5] * 0x100)) + ((buffer[6] * 0x100) * 0x100)) + (((buffer[7] * 0x100) * 0x100) * 0x100); ipCount = Convert.ToInt64((double)(((double)(lastStartIpOffset - firstStartIpOffset)) / 7.0)); if (ipCount <= 1L) { throw new ArgumentException("ip FileDataError"); } } private static long IpToInt(string ip) { char[] separator = new char[] { '.' }; if (ip.Split(separator).Length == 3) { ip = ip + ".0"; } string[] strArray = ip.Split(separator); long num2 = ((long.Parse(strArray[0]) * 0x100L) * 0x100L) * 0x100L; long num3 = (long.Parse(strArray[1]) * 0x100L) * 0x100L; long num4 = long.Parse(strArray[2]) * 0x100L; long num5 = long.Parse(strArray[3]); return (((num2 + num3) + num4) + num5); } private static string IntToIP(long ip_Int) { long num = (long)((ip_Int & 0xff000000L) >> 0x18); if (num < 0L) { num += 0x100L; } long num2 = (ip_Int & 0xff0000L) >> 0x10; if (num2 < 0L) { num2 += 0x100L; } long num3 = (ip_Int & 0xff00L) >> 8; if (num3 < 0L) { num3 += 0x100L; } long num4 = ip_Int & 0xffL; if (num4 < 0L) { num4 += 0x100L; } return (num.ToString() + "." + num2.ToString() + "." + num3.ToString() + "." + num4.ToString()); } public IPLocation Query(string ip) { if (!regex.Match(ip).Success) { ip = "300.300.300.300"; } IPLocation ipLocation = new IPLocation() { IP = ip }; long intIP = IpToInt(ip); if ((intIP >= IpToInt("127.0.0.1") && (intIP <= IpToInt("127.255.255.255")))) { ipLocation.Country = "本机内部环回地址"; ipLocation.Local = ""; } else { if ((((intIP >= IpToInt("0.0.0.0")) && (intIP <= IpToInt("2.255.255.255"))) || ((intIP >= IpToInt("64.0.0.0")) && (intIP <= IpToInt("126.255.255.255")))) || ((intIP >= IpToInt("58.0.0.0")) && (intIP <= IpToInt("60.255.255.255")))) { ipLocation.Country = "网络保留地址"; ipLocation.Local = ""; } } long right = ipCount; long left = 0L; long middle = 0L; long startIp = 0L; long endIpOff = 0L; long endIp = 0L; int countryFlag = 0; while (left < (right - 1L)) { middle = (right + left) / 2L; startIp = GetStartIp(middle, out endIpOff); if (intIP == startIp) { left = middle; break; } if (intIP > startIp) { left = middle; } else { right = middle; } } startIp = GetStartIp(left, out endIpOff); endIp = GetEndIp(endIpOff, out countryFlag); if ((startIp <= intIP) && (endIp >= intIP)) { string local; ipLocation.Country = GetCountry(endIpOff, countryFlag, out local); ipLocation.Local = local; } else { ipLocation.Country = "未知的IP地址"; ipLocation.Local = ""; } return ipLocation; } private long GetStartIp(long left, out long endIpOff) { long leftOffset = firstStartIpOffset + (left * 7L); byte[] buffer = new byte[7]; Array.Copy(data, leftOffset, buffer, 0, 7); endIpOff = (Convert.ToInt64(buffer[4].ToString()) + (Convert.ToInt64(buffer[5].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[6].ToString()) * 0x100L) * 0x100L); return ((Convert.ToInt64(buffer[0].ToString()) + (Convert.ToInt64(buffer[1].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[2].ToString()) * 0x100L) * 0x100L)) + (((Convert.ToInt64(buffer[3].ToString()) * 0x100L) * 0x100L) * 0x100L); } private long GetEndIp(long endIpOff, out int countryFlag) { byte[] buffer = new byte[5]; Array.Copy(data, endIpOff, buffer, 0, 5); countryFlag = buffer[4]; return ((Convert.ToInt64(buffer[0].ToString()) + (Convert.ToInt64(buffer[1].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[2].ToString()) * 0x100L) * 0x100L)) + (((Convert.ToInt64(buffer[3].ToString()) * 0x100L) * 0x100L) * 0x100L); } /// <summary> /// Gets the country. /// </summary> /// <param name="endIpOff">The end ip off.</param> /// <param name="countryFlag">The country flag.</param> /// <param name="local">The local.</param> /// <returns>country</returns> private string GetCountry(long endIpOff, int countryFlag, out string local) { string country = ""; long offset = endIpOff + 4L; switch (countryFlag) { case 1: case 2: country = GetFlagStr(ref offset, ref countryFlag, ref endIpOff); offset = endIpOff + 8L; local = (1 == countryFlag) ? "" : GetFlagStr(ref offset, ref countryFlag, ref endIpOff); break; default: country = GetFlagStr(ref offset, ref countryFlag, ref endIpOff); local = GetFlagStr(ref offset, ref countryFlag, ref endIpOff); break; } return country; } private string GetFlagStr(ref long offset, ref int countryFlag, ref long endIpOff) { int flag = 0; byte[] buffer = new byte[3]; while (true) { //用于向前累加偏移量 long forwardOffset = offset; flag = data[forwardOffset++]; //没有重定向 if (flag != 1 && flag != 2) { break; } Array.Copy(data, forwardOffset, buffer, 0, 3); forwardOffset += 3; if (flag == 2) { countryFlag = 2; endIpOff = offset - 4L; } offset = (Convert.ToInt64(buffer[0].ToString()) + (Convert.ToInt64(buffer[1].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[2].ToString()) * 0x100L) * 0x100L); } if (offset < 12L) { return ""; } return GetStr(ref offset); } private string GetStr(ref long offset) { byte lowByte = 0; byte highByte = 0; StringBuilder stringBuilder = new StringBuilder(); byte[] bytes = new byte[2]; Encoding encoding = Encoding.GetEncoding("GB2312"); while (true) { lowByte = data[offset++]; if (lowByte == 0) { return stringBuilder.ToString(); } if (lowByte > 0x7f) { highByte = data[offset++]; bytes[0] = lowByte; bytes[1] = highByte; if (highByte == 0) { return stringBuilder.ToString(); } stringBuilder.Append(encoding.GetString(bytes)); } else { stringBuilder.Append((char)lowByte); } } } } 映射类如下： IPLocation.cs public class IPLocation { public string IP { get; set; } public string Country { get; set; } public string Local { get; set; } } 调用方法： IPScanner qqWry = new IPScanner(Server.MapPath("~/Common/QQWry.dat")); IPLocation ip = qqWry.Query("真实ip地址");
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