/// <summary>
/// 获取请求机的mac地址
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public static string GetMac(this HttpRequestBase request)
{
string strmac = request.Headers.Get("mac");
if (strmac.NotNullAndEmpty()) return strmac;
if (strmac.IsNullOrEmpty())
{
var cookie = request.Cookies.Get("mac");
if (cookie != null)
strmac = cookie.Value;
}
if (strmac.NotNullAndEmpty()) return strmac;
if (strmac.IsNull()) strmac = "";
// IPAddress.Parse(request.UserHostAddress).Address
Int32 ldest = inet_addr(request.UserHostAddress);//目的地的ip
Int32 lhost = 0;//本地的ip
try
{
var macinfo = new Byte[6];
uint length = 6;
int ii = SendARP(ldest, lhost, macinfo, ref length);
return macinfo.Aggregate(strmac, (current, item) => current + item.ToString("X2"));
}
catch (Exception err)
{
return "";
}
}
/// <summary>
/// Calculates CRC32 value for passsed byte array <paramref name="buffer"/> using
/// initial value of <paramref name="crc"/> parameter as base for CRC calculation.
/// </summary>
public static UInt32 Compute(Byte[] buffer, UInt32 crc = 0)
{
return buffer.Aggregate(crc,
(index, item) => _crcTable[((index >> 24) ^ item) & 0xFF] ^ (index << 8));
}
