/// <summary>
///
/// </summary>
/// <param name="avp"></param>
/// <param name="dict"></param>
/// <returns></returns>
private byte[] ProcessNestedGroupedAvp(Avp avp, Dictionary <int, AttributeInfo> dict)
{
//Process the Further nested Avps `````````````here. Untested Code
//Copy Nested Avp Code to GroupedBytes
int AvpCode = avp.AvpCode;
//Change the Length to Dynamic Length of Avp
byte[] nestedAvpBytes = new byte[1024];
int destOffset = 0;
//Copy Grouped Avp Code to GroupedBytes
int gAvpCode = IPAddress.HostToNetworkOrder(AvpCode);
Buffer.BlockCopy(BitConverter.GetBytes(gAvpCode), 0, nestedAvpBytes, 0, 4);
destOffset += 4;
//AvpFlags {V M P r r r r r}
byte nestedAvpFlags = (byte)(0 << 0);
nestedAvpFlags = (byte)(0 << 1);
nestedAvpFlags = (byte)(0 << 2);
nestedAvpFlags = (byte)(0 << 3);
nestedAvpFlags = (byte)(0 << 5);
if (avp.isVendorSpecific)
{
nestedAvpFlags = (byte)(0 << 7);
}
if (isMandatory)
{
nestedAvpFlags = (byte)(1 << 6);
}
Buffer.BlockCopy(BitConverter.GetBytes(nestedAvpFlags), 0, nestedAvpBytes, destOffset, 1);
destOffset += 1;
//Leaving 3 Bytes Place Holder for Copying Actual Length of Grouped Avp at the end of method because we can know this length at the end of copying all Avps
destOffset += 3;
//Avp Value Bytes
int Padding = 0;
byte[] retValueBytes = GetAvpValueBytes(avp, ref Padding, dict);
//Grouped Avp Length
int lenOfNestedAvp = IPAddress.HostToNetworkOrder(destOffset);
Buffer.BlockCopy(BitConverter.GetBytes(lenOfNestedAvp), 1, nestedAvpBytes, 5, 3);
byte[] retVal = new byte[destOffset];
Buffer.BlockCopy(nestedAvpBytes, 0, retVal, 0, destOffset);
return(retVal);
}
/// <summary>
///
/// </summary>
/// <param name="stackContext"></param>
private static void Process_CEA(object sender, object e)
{
Common.StackLog.Write2TraceLog("Process_CEA", "Entering Process_CEA");
Message cea = (e as Message);
Avp ResultCode = cea.avps.Find(a => a.AvpCode == 268);
if ((int)ResultCode.AvpValue == 2001)
{
Common.StackLog.Write2TraceLog("Process_CEA", "Recieved CEA with Succcess Code");
//Update Peer Entry in PeerTable
UpdateConnectionState(stackContext.peers[0], PeerState.OPEN);
}
else
{
Common.StackLog.Write2TraceLog("Process_CEA", "Error in Connecting to the Remote Peer");
cea.PrintMessage();
}
Common.StackLog.Write2TraceLog("Process_CEA", "Exiting Process_CEA");
}
/// <summary>
/// This method Creates CAPABILITY EXCHANGE REQUEST MESSAGE
/// </summary>
/// <returns></returns>
public Message CapabilityExchangeRequest(StackContext stackContext)
{
Message cerReq = new Message(stackContext);
cerReq.CommandCode = DiameterMessageCode.CAPABILITY_EXCHANGE;
cerReq.EndtoEndIdentifier = cerReq.GetEndToEndIdentifier();
cerReq.HopbyHopIdentifier = cerReq.GetHopByHopIdentifier();
cerReq.ApplicationID = 0;
//Set Mandatory Attributes
cerReq.avps.Add(new Avp(DiameterAvpCode.Origin_Host, stackContext.OrigionHost)
{
isMandatory = true
});
cerReq.avps.Add(new Avp(DiameterAvpCode.Origin_Realm, stackContext.OrigionRealm)
{
isMandatory = true
});
cerReq.avps.Add(new Avp(DiameterAvpCode.Host_IP_Address, IPAddress.Parse(Utility.LocalIPAddress()))
{
isMandatory = true
});
cerReq.avps.Add(new Avp(DiameterAvpCode.Vendor_Id, 42452)
{
isMandatory = true
});
cerReq.avps.Add(new Avp(DiameterAvpCode.Product_Name, "EMI Networks (SMC-PVT) LTD.")
{
isMandatory = true
});
cerReq.avps.Add(new Avp(DiameterAvpCode.Origin_State_Id, 1));
cerReq.avps.Add(new Avp(DiameterAvpCode.Supported_Vendor_Id, 10415));
cerReq.avps.Add(new Avp(DiameterAvpCode.Auth_Application_Id, 167772151));
//cerReq.avps.Add(new Avp(DiameterAvpCode.Inband_Security_Id, 1234)); //Not Recommended in CER/CEA Messages
cerReq.avps.Add(new Avp(DiameterAvpCode.Acct_Application_Id, 0));
////Create Vendor_Specific_Application_Id Grouped Avp
Avp avpVendorSpecificAppId = new Avp(DiameterAvpCode.Vendor_Specific_Application_Id)
{
isGrouped = true
};
Avp avpVendorId = new Avp(DiameterAvpCode.Vendor_Id, 11);
Avp avpAuthApplicationId = new Avp(DiameterAvpCode.Auth_Application_Id, 167772151);
avpVendorSpecificAppId.groupedAvps.Add(avpVendorId); //Add Avp to Grouped Avp
avpVendorSpecificAppId.groupedAvps.Add(avpAuthApplicationId); //Add Avp to Grouped Avp
cerReq.avps.Add(avpVendorSpecificAppId); //Now Add Avp to CER Command
//Second Loop
avpVendorSpecificAppId = new Avp(DiameterAvpCode.Vendor_Specific_Application_Id)
{
isGrouped = true
};
avpVendorSpecificAppId.groupedAvps.Clear();
avpVendorSpecificAppId.groupedAvps.Add(avpVendorId);
Avp avpAcctApplicationId = new Avp(DiameterAvpCode.Acct_Application_Id, 0);
avpVendorSpecificAppId.groupedAvps.Add(avpAcctApplicationId);
cerReq.avps.Add(avpVendorSpecificAppId);
cerReq.avps.Add(new Avp(DiameterAvpCode.Firmware_Revision, 1));
return(cerReq);
}
public static sbyte[] encodeAvp(Avp avp)
{
sbyte[] bytes = new sbyte[0];
return(bytes);
}
/// <summary>
/// Returns Grouped Avp Bytes Including Nested Grouped Avps
/// </summary>
/// <param name="AvpCode"></param>
/// <returns></returns>
private byte[] GetGroupedAvpBytes(Avp gAvp, Dictionary <int, AttributeInfo> dict)
{
//Dest Array Offset
int destOffset = 0;
int AvpCode = gAvp.AvpCode;
//We may change the Length to Dynamic Length of Avp, If we can figure out to calculate it before processing
byte[] groupedAvpBytes = new byte[1024];
//Copy Grouped Avp Code to GroupedBytes
int gAvpCode = IPAddress.HostToNetworkOrder(AvpCode);
Buffer.BlockCopy(BitConverter.GetBytes(gAvpCode), 0, groupedAvpBytes, 0, 4);
destOffset += 4;
//Set Flags for the the Avp AvpFlags {V M P r r r r r}
byte gAvpFlags = (byte)(0 << 0);
gAvpFlags = (byte)(0 << 1);
gAvpFlags = (byte)(0 << 2);
gAvpFlags = (byte)(0 << 3);
gAvpFlags = (byte)(0 << 5);
if (gAvp.isVendorSpecific)
{
gAvpFlags = (byte)(1 << 7);
}
if (isMandatory)
{
gAvpFlags = (byte)(1 << 6);
}
Buffer.BlockCopy(BitConverter.GetBytes(gAvpFlags), 0, groupedAvpBytes, destOffset, 1);
destOffset += 1;
//Leaving 3 Bytes Place Holder for Copying Actual Length of Grouped Avp at the end of method because we can know this length at the end of copying all Avps
destOffset += 3;
if (gAvp.isVendorSpecific)
{
UInt32 vId = (UInt32)IPAddress.HostToNetworkOrder(gAvp.VendorId);
Buffer.BlockCopy(BitConverter.GetBytes(vId), 0, groupedAvpBytes, destOffset, 4);
destOffset += 4;
}
//Now Copy All Avps inside Grouped Avp
foreach (Avp avp in gAvp.groupedAvps)
{
byte[] totalAvpBytes = GetAvpBytes(avp, dict);
Buffer.BlockCopy(totalAvpBytes, 0, groupedAvpBytes, destOffset, totalAvpBytes.Length);
destOffset += totalAvpBytes.Length;
}
//Set the Length of Grouped Avp
UInt32 LenOfGroupedAvp = (UInt32)IPAddress.HostToNetworkOrder(destOffset);
Buffer.BlockCopy(BitConverter.GetBytes(LenOfGroupedAvp), 1, groupedAvpBytes, 5, 3);
byte[] retVal = new byte[destOffset];
Buffer.BlockCopy(groupedAvpBytes, 0, retVal, 0, destOffset);
return(retVal);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public byte[] GetAvpValueBytes(Avp avp, ref int Padding, Dictionary <int, AttributeInfo> dict)
{
int AvpCode = avp.AvpCode;
object Value = avp.AvpValue;
if (!dict.ContainsKey(AvpCode))
{
Common.StackLog.Write2ErrorLog("GetValueBytes", "Lookup For Avp [" + AvpCode + "] ");
Exception exp = new Exception("Avp Code:" + AvpCode.ToString() + " not found in dictionary");
Common.StackLog.Write2ErrorLog("GetValueBytes", "Lookup For Avp [" + AvpCode + "] ");
throw exp;
}
AttributeInfo avpInfo = dict[AvpCode];
// Console.WriteLine("Success");
switch (avpInfo.DataType)
{
case "Address":
{
short addressFamily = 1;
addressFamily = IPAddress.HostToNetworkOrder(addressFamily);
byte[] addressFamilyBytes = BitConverter.GetBytes(addressFamily);
byte[] addressBytes = IPAddress.Parse(Value.ToString()).GetAddressBytes();
//Calculate Padding
int remainder = (addressFamilyBytes.Length + addressBytes.Length) % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[addressFamilyBytes.Length + addressBytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(addressFamilyBytes, 0, retVal, 0, addressFamilyBytes.Length);
System.Buffer.BlockCopy(addressBytes, 0, retVal, 2, addressBytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "OctetString":
{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
byte[] OctetStringBytes = encoding.GetBytes(Value.ToString());
//Calculate Padding
int remainder = (OctetStringBytes.Length) % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[OctetStringBytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(OctetStringBytes, 0, retVal, 0, OctetStringBytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "DiamIdent":
{
byte[] identityBytes = System.Text.Encoding.UTF8.GetBytes(Value.ToString());
//Calculate Padding
int remainder = identityBytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[identityBytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(identityBytes, 0, retVal, 0, identityBytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Unsigned32":
{
byte[] UINTBytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((int)Value));
//Calculate Padding
int remainder = UINTBytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[UINTBytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(UINTBytes, 0, retVal, 0, UINTBytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Integer32":
{
byte[] UINTBytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((int)Value));
//Calculate Padding
int remainder = UINTBytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[UINTBytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(UINTBytes, 0, retVal, 0, UINTBytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Integer8":
{
long avpVal = Convert.ToInt64(Value);
byte[] U64Bytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(avpVal));
//Calculate Padding
int remainder = U64Bytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[U64Bytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(U64Bytes, 0, retVal, 0, U64Bytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Unsigned64":
{
long avpVal = Convert.ToInt64(Value);
byte[] U64Bytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(avpVal));
//Calculate Padding
int remainder = U64Bytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[U64Bytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(U64Bytes, 0, retVal, 0, U64Bytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Integer64":
{
long avpVal = Convert.ToInt64(Value);
byte[] U64Bytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(avpVal));
//Calculate Padding
int remainder = U64Bytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[U64Bytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(U64Bytes, 0, retVal, 0, U64Bytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "UTF8String":
{
byte[] UTF8Bytes = Encoding.UTF8.GetBytes(Value.ToString());
//Calculate Padding
int remainder = (UTF8Bytes.Length) % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[UTF8Bytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(UTF8Bytes, 0, retVal, 0, UTF8Bytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Enumerated":
{
byte[] enumratedBytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((int)Value));
//Calculate Padding
int remainder = enumratedBytes.Length % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[enumratedBytes.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(enumratedBytes, 0, retVal, 0, enumratedBytes.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Time":
{
ulong seconds = Convert.ToUInt64(Value);
//byte[] ntpTimeStamp = DiameterType.NtpTimestamp2Bytes(seconds) ;
byte[] ntpTimeStamp = DiameterType.ConvertToNtp(seconds);
//Calculate Padding
int remainder = (ntpTimeStamp.Length) % 4;
if (remainder == 0)
{
Padding = 0;
}
else
{
Padding = 4 - remainder;
}
byte[] retVal = new byte[ntpTimeStamp.Length + Padding];
//Copy Value Bytes
System.Buffer.BlockCopy(ntpTimeStamp, 0, retVal, 0, ntpTimeStamp.Length);
//Add Padding Bytes
if (Padding > 0)
{
int destOffSet = retVal.Length - Padding;
System.Buffer.BlockCopy(Enumerable.Repeat((byte)0x0, Padding).ToArray(), 0, retVal, destOffSet, Padding);
}
return(retVal);
}
case "Grouped":
{
// Process Group AVP here
byte[] retVal = GetGroupedAvpBytes(avp, dict);
return(retVal);
}
default:
{
return(null);
}
}
/// Diameter Types
//• OctetString
//• Integer32
//• Integer64
//• Unsigned32
//• Unsigned64
//• Float32
//• Float64
//• Grouped
//• Address
//• Time
//• UTF8String
//• DiameterIdentity
//• DiameterURI
//• Enumerated
//• IPFilterRule
//• QoSFilterRule
}
/// <summary>
///
/// </summary>
/// <param name="avp"></param>
/// <returns></returns>
public byte[] GetAvpBytes(Avp avp, Dictionary <int, AttributeInfo> dict)
{
int offset = 0;
//Avp Value Bytes
int Padding = 0;
byte[] retValueBytes = GetAvpValueBytes(avp, ref Padding, dict);
//If Grouped Avp then Above Method will return all Grouped AvpBytes, Take Care of Paddings Here or in Grouped Avp itself.
if (avp.isGrouped)
{
return(retValueBytes);
}
//
if (avp.isVendorSpecific)
{
avp.AvpLength = retValueBytes.Length + 12;
}
else
{
avp.AvpLength = retValueBytes.Length + 8;
}
//Initialize Return Array
byte[] AvpBytesToRet = new byte[avp.AvpLength];
//Add Header Bytes
//Avp Code
int AvpCode = IPAddress.HostToNetworkOrder(avp.AvpCode);
Buffer.BlockCopy(BitConverter.GetBytes(AvpCode), 0, AvpBytesToRet, offset, 4);
offset += 4;
//AvpFlags {V M P r r r r r}
byte flags = (byte)(0 << 0);
flags = (byte)(0 << 1);
flags = (byte)(0 << 2);
flags = (byte)(0 << 3);
flags = (byte)(0 << 5);
if (avp.isVendorSpecific)
{
flags = (byte)(1 << 7);
}
if (isMandatory)
{
flags = (byte)(1 << 6);
}
Buffer.BlockCopy(BitConverter.GetBytes(flags), 0, AvpBytesToRet, offset, 1);
offset += 1;
//AvpLength, Discard 0th Byte and Always excluding the Paddings from length
int Len = avp.AvpLength - Padding;
int lenOfAvpToCopy = IPAddress.HostToNetworkOrder(Len);
Buffer.BlockCopy(BitConverter.GetBytes(lenOfAvpToCopy), 1, AvpBytesToRet, offset, 3);
offset += 3;
//Vendor ID
if (avp.isVendorSpecific)
{
UInt32 vId = (UInt32)IPAddress.HostToNetworkOrder(avp.VendorId);
Buffer.BlockCopy(BitConverter.GetBytes(vId), 0, AvpBytesToRet, offset, 4);
offset += 4;
}
//Add Value Byes
Buffer.BlockCopy(retValueBytes, 0, AvpBytesToRet, offset, retValueBytes.Length);
offset += retValueBytes.Length - Padding;
return(AvpBytesToRet);
}