private void ParseAttributes(byte[] bytes, int startIndex, int length, TurnMessageRfc rfc)
{
int currentIndex = startIndex + HeaderLength;
int endIndex = startIndex + length;
while (currentIndex < endIndex)
{
UInt16 attributeType1 = bytes.BigendianToUInt16(currentIndex);
if (Enum.IsDefined(typeof(AttributeType), (Int32)attributeType1) == false)
{
throw new TurnMessageException(ErrorCode.UnknownAttribute);
}
AttributeType attributeType = (AttributeType)attributeType1;
if (rfc == TurnMessageRfc.Rfc3489)
{
if (IsRfc3489(attributeType))
{
throw new TurnMessageException(ErrorCode.UnknownAttribute);
}
}
if (attributeType == AttributeType.Fingerprint)
{
if (Fingerprint == null)
{
if (storedBytes == null)
{
storedBytes = new byte[length];
Array.Copy(bytes, startIndex, storedBytes, 0, length);
}
fingerprintStartOffset = currentIndex - startIndex;
Fingerprint = new Fingerprint();
Fingerprint.Parse(bytes, ref currentIndex);
}
else
{
Attribute.Skip(bytes, ref currentIndex);
}
}
else if (MessageIntegrity != null)
{
Attribute.Skip(bytes, ref currentIndex);
}
else
{
switch (attributeType)
{
case AttributeType.AlternateServer:
AlternateServer = new AlternateServer();
AlternateServer.Parse(bytes, ref currentIndex);
break;
case AttributeType.Bandwidth:
Bandwidth = new Bandwidth();
Bandwidth.Parse(bytes, ref currentIndex);
break;
case AttributeType.Data:
Data = new Data();
Data.Parse(bytes, ref currentIndex);
break;
case AttributeType.DestinationAddress:
DestinationAddress = new DestinationAddress();
DestinationAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.ErrorCode:
ErrorCodeAttribute = new ErrorCodeAttribute();
ErrorCodeAttribute.Parse(bytes, ref currentIndex);
break;
case AttributeType.Fingerprint:
break;
case AttributeType.Lifetime:
Lifetime = new Lifetime();
Lifetime.Parse(bytes, ref currentIndex);
break;
case AttributeType.MagicCookie:
MagicCookie = new MagicCookie();
MagicCookie.Parse(bytes, ref currentIndex);
break;
case AttributeType.MappedAddress:
MappedAddress = new MappedAddress();
MappedAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.MessageIntegrity:
messageIntegrityStartOffset = currentIndex - startIndex;
if (storedBytes == null)
{
if (rfc == TurnMessageRfc.MsTurn)
{
storedBytes = new byte[GetPadded64(messageIntegrityStartOffset)];
Array.Copy(bytes, startIndex, storedBytes, 0, messageIntegrityStartOffset);
}
else
{
storedBytes = new byte[length];
Array.Copy(bytes, startIndex, storedBytes, 0, length);
}
}
MessageIntegrity = new MessageIntegrity();
MessageIntegrity.Parse(bytes, ref currentIndex);
break;
case AttributeType.MsVersion:
MsVersion = new MsVersion();
MsVersion.Parse(bytes, ref currentIndex);
break;
case AttributeType.MsSequenceNumber:
MsSequenceNumber = new MsSequenceNumber();
MsSequenceNumber.Parse(bytes, ref currentIndex);
break;
case AttributeType.RemoteAddress:
RemoteAddress = new RemoteAddress();
RemoteAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.Software:
Software = new Software();
Software.Parse(bytes, ref currentIndex);
break;
case AttributeType.UnknownAttributes:
UnknownAttributes = new UnknownAttributes();
// Not Implemented
UnknownAttributes.Parse(bytes, ref currentIndex);
break;
case AttributeType.Username:
if (MsVersion != null)
{
MsUsername = new MsUsername();
MsUsername.Parse(bytes, ref currentIndex);
}
else
{
Username = new Username();
Username.Parse(bytes, ref currentIndex);
}
break;
// ietf-mmusic-ice
case AttributeType.Priority:
case AttributeType.UseCandidate:
case AttributeType.IceControlled:
case AttributeType.IceControlling:
Attribute.Skip(bytes, ref currentIndex);
break;
// rfc3489
case AttributeType.ChangedAddress:
ChangedAddress = new ChangedAddress();
ChangedAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.ChangeRequest:
ChangeRequest = new ChangeRequest();
ChangeRequest.Parse(bytes, ref currentIndex);
break;
case AttributeType.ResponseAddress:
ResponseAddress = new ResponseAddress();
ResponseAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.SourceAddress:
SourceAddress = new SourceAddress();
SourceAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.ReflectedFrom:
ReflectedFrom = new ReflectedFrom();
ReflectedFrom.Parse(bytes, ref currentIndex);
break;
case AttributeType.Password:
Password = new Password();
Password.Parse(bytes, ref currentIndex);
break;
default:
if (rfc == TurnMessageRfc.MsTurn)
{
switch (attributeType)
{
case AttributeType.Nonce:
Nonce = new Nonce(rfc);
Nonce.Parse(bytes, ref currentIndex);
break;
case AttributeType.Realm:
Realm = new Realm(rfc);
Realm.Parse(bytes, ref currentIndex);
break;
case AttributeType.XorMappedAddress:
XorMappedAddress = new XorMappedAddress(rfc);
XorMappedAddress.Parse(bytes, ref currentIndex, TransactionId);
break;
default:
throw new NotImplementedException();
}
}
else
{
switch (attributeType)
{
case AttributeType.NonceStun:
Nonce = new Nonce(rfc);
Nonce.Parse(bytes, ref currentIndex);
break;
case AttributeType.RealmStun:
Realm = new Realm(rfc);
Realm.Parse(bytes, ref currentIndex);
break;
case AttributeType.XorMappedAddressStun:
XorMappedAddress = new XorMappedAddress(rfc);
XorMappedAddress.Parse(bytes, ref currentIndex, TransactionId);
break;
default:
throw new NotImplementedException();
}
}
break;
}
}
if (rfc != TurnMessageRfc.MsTurn)
{
if (currentIndex % 4 > 0)
{
currentIndex += 4 - currentIndex % 4;
}
}
}
}
private void ParseAttributes(byte[] bytes, int startIndex, int length, TurnMessageRfc rfc)
{
int currentIndex = startIndex + HeaderLength;
int endIndex = startIndex + length;
while (currentIndex < endIndex)
{
UInt16 attributeType1 = bytes.BigendianToUInt16(currentIndex);
if (Enum.IsDefined(typeof(AttributeType), (Int32)attributeType1) == false)
throw new TurnMessageException(ErrorCode.UnknownAttribute);
AttributeType attributeType = (AttributeType)attributeType1;
if (rfc == TurnMessageRfc.Rfc3489)
if (IsRfc3489(attributeType))
throw new TurnMessageException(ErrorCode.UnknownAttribute);
if (attributeType == AttributeType.Fingerprint)
{
if (Fingerprint == null)
{
if (storedBytes == null)
{
storedBytes = new byte[length];
Array.Copy(bytes, startIndex, storedBytes, 0, length);
}
fingerprintStartOffset = currentIndex - startIndex;
Fingerprint = new Fingerprint();
Fingerprint.Parse(bytes, ref currentIndex);
}
else
{
Attribute.Skip(bytes, ref currentIndex);
}
}
else if (MessageIntegrity != null)
{
Attribute.Skip(bytes, ref currentIndex);
}
else
{
switch (attributeType)
{
case AttributeType.AlternateServer:
AlternateServer = new AlternateServer();
AlternateServer.Parse(bytes, ref currentIndex);
break;
case AttributeType.Bandwidth:
Bandwidth = new Bandwidth();
Bandwidth.Parse(bytes, ref currentIndex);
break;
case AttributeType.Data:
Data = new Data();
Data.Parse(bytes, ref currentIndex);
break;
case AttributeType.DestinationAddress:
DestinationAddress = new DestinationAddress();
DestinationAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.ErrorCode:
ErrorCodeAttribute = new ErrorCodeAttribute();
ErrorCodeAttribute.Parse(bytes, ref currentIndex);
break;
case AttributeType.Fingerprint:
break;
case AttributeType.Lifetime:
Lifetime = new Lifetime();
Lifetime.Parse(bytes, ref currentIndex);
break;
case AttributeType.MagicCookie:
MagicCookie = new MagicCookie();
MagicCookie.Parse(bytes, ref currentIndex);
break;
case AttributeType.MappedAddress:
MappedAddress = new MappedAddress();
MappedAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.MessageIntegrity:
messageIntegrityStartOffset = currentIndex - startIndex;
if (storedBytes == null)
{
if (rfc == TurnMessageRfc.MsTurn)
{
storedBytes = new byte[GetPadded64(messageIntegrityStartOffset)];
Array.Copy(bytes, startIndex, storedBytes, 0, messageIntegrityStartOffset);
}
else
{
storedBytes = new byte[length];
Array.Copy(bytes, startIndex, storedBytes, 0, length);
}
}
MessageIntegrity = new MessageIntegrity();
MessageIntegrity.Parse(bytes, ref currentIndex);
break;
case AttributeType.MsVersion:
MsVersion = new MsVersion();
MsVersion.Parse(bytes, ref currentIndex);
break;
case AttributeType.MsSequenceNumber:
MsSequenceNumber = new MsSequenceNumber();
MsSequenceNumber.Parse(bytes, ref currentIndex);
break;
case AttributeType.RemoteAddress:
RemoteAddress = new RemoteAddress();
RemoteAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.Software:
Software = new Software();
Software.Parse(bytes, ref currentIndex);
break;
case AttributeType.UnknownAttributes:
UnknownAttributes = new UnknownAttributes();
// Not Implemented
UnknownAttributes.Parse(bytes, ref currentIndex);
break;
case AttributeType.Username:
if (MsVersion != null)
{
MsUsername = new MsUsername();
MsUsername.Parse(bytes, ref currentIndex);
}
else
{
Username = new Username();
Username.Parse(bytes, ref currentIndex);
}
break;
// ietf-mmusic-ice
case AttributeType.Priority:
case AttributeType.UseCandidate:
case AttributeType.IceControlled:
case AttributeType.IceControlling:
Attribute.Skip(bytes, ref currentIndex);
break;
// rfc3489
case AttributeType.ChangedAddress:
ChangedAddress = new ChangedAddress();
ChangedAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.ChangeRequest:
ChangeRequest = new ChangeRequest();
ChangeRequest.Parse(bytes, ref currentIndex);
break;
case AttributeType.ResponseAddress:
ResponseAddress = new ResponseAddress();
ResponseAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.SourceAddress:
SourceAddress = new SourceAddress();
SourceAddress.Parse(bytes, ref currentIndex);
break;
case AttributeType.ReflectedFrom:
ReflectedFrom = new ReflectedFrom();
ReflectedFrom.Parse(bytes, ref currentIndex);
break;
case AttributeType.Password:
Password = new Password();
Password.Parse(bytes, ref currentIndex);
break;
default:
if (rfc == TurnMessageRfc.MsTurn)
{
switch (attributeType)
{
case AttributeType.Nonce:
Nonce = new Nonce(rfc);
Nonce.Parse(bytes, ref currentIndex);
break;
case AttributeType.Realm:
Realm = new Realm(rfc);
Realm.Parse(bytes, ref currentIndex);
break;
case AttributeType.XorMappedAddress:
XorMappedAddress = new XorMappedAddress(rfc);
XorMappedAddress.Parse(bytes, ref currentIndex, TransactionId);
break;
default:
throw new NotImplementedException();
}
}
else
{
switch (attributeType)
{
case AttributeType.NonceStun:
Nonce = new Nonce(rfc);
Nonce.Parse(bytes, ref currentIndex);
break;
case AttributeType.RealmStun:
Realm = new Realm(rfc);
Realm.Parse(bytes, ref currentIndex);
break;
case AttributeType.XorMappedAddressStun:
XorMappedAddress = new XorMappedAddress(rfc);
XorMappedAddress.Parse(bytes, ref currentIndex, TransactionId);
break;
default:
throw new NotImplementedException();
}
}
break;
}
}
if (rfc != TurnMessageRfc.MsTurn)
{
if (currentIndex % 4 > 0)
currentIndex += 4 - currentIndex % 4;
}
}
}