/// <summary>
/// Creates a new instance of this class
/// </summary>
public DHCPFrame()
{
dhtMessageType = DHCPType.BootRequest;
dhtHardwareType = eExNetworkLibrary.HardwareAddressType.Ethernet;
sHardwarelen = 6;
sHops = 0;
iTransactionID = 0;
iSecs = 0;
bValidIPFlag = true;
ipaClientAddress = IPAddress.Any;
ipaOwnAddress = IPAddress.Any;
ipaServerAddress = IPAddress.Any;
ipaRelayAddress = IPAddress.Any;
macClientMac = MACAddress.Empty;
strRequestedFile = "";
strRequestedServerName = "";
lTLVs = new List <DHCPTLVItem>();
}
/// <summary>
/// Creates a new instance of this class by parsing the given data
/// </summary>
/// <param name="bData">The data to parse</param>
public DHCPFrame(byte[] bData)
{
byte[] bAddressBytes = new byte[4];
byte[] bMacBytes = new byte[6];
lTLVs = new List <DHCPTLVItem>();
DHCPTLVItem dhcpItem;
dhtMessageType = (DHCPType)bData[0];
dhtHardwareType = (HardwareAddressType)bData[1];
sHardwarelen = (short)bData[2];
sHops = (short)bData[3];
iTransactionID = BitConverter.ToInt32(bData, 4);
iSecs = BitConverter.ToInt16(bData, 8);
bValidIPFlag = (bData[10] & 0x80) == 1;
for (int iC1 = 0; iC1 < 4; iC1++)
{
bAddressBytes[iC1] = bData[12 + iC1];
}
ipaClientAddress = new IPAddress(bAddressBytes);
for (int iC1 = 0; iC1 < 4; iC1++)
{
bAddressBytes[iC1] = bData[16 + iC1];
}
ipaOwnAddress = new IPAddress(bAddressBytes);
for (int iC1 = 0; iC1 < 4; iC1++)
{
bAddressBytes[iC1] = bData[20 + iC1];
}
ipaServerAddress = new IPAddress(bAddressBytes);
for (int iC1 = 0; iC1 < 4; iC1++)
{
bAddressBytes[iC1] = bData[24 + iC1];
}
ipaRelayAddress = new IPAddress(bAddressBytes);
for (int iC1 = 0; iC1 < 6; iC1++)
{
bMacBytes[iC1] = bData[28 + iC1];
}
macClientMac = new MACAddress(bMacBytes);
strRequestedServerName = Encoding.ASCII.GetString(bData, 34, 64).Trim(new char[] { '\0' });
strRequestedFile = Encoding.ASCII.GetString(bData, 98, 128).Trim(new char[] { '\0' });
if (bData[236] != 0x63 || bData[237] != 0x82 || bData[238] != 0x53 || bData[239] != 0x63)
{
throw new Exception("Invalid DHCP magic number");
}
int iC2 = 240;
while (iC2 < bData.Length)
{
if (bData[iC2] == (int)DHCPOptions.End)
{
break;
}
dhcpItem = new DHCPTLVItem(bData, iC2);
lTLVs.Add(dhcpItem);
iC2 += dhcpItem.Length;
}
}
