public void ParseCoturnSTUNResponseTestMethod()
{
Console.WriteLine(System.Reflection.MethodBase.GetCurrentMethod().Name);
byte[] stunResp = new byte[]{ 0x01, 0x01, 0x00, 0x44, 0x21, 0x12, 0xa4, 0x42, 0x6b, 0x4c, 0xf3, 0x18, 0xd0, 0xa7, 0xf5, 0x40,
0x97, 0x30, 0x3a, 0x27, 0x00, 0x20, 0x00, 0x08, 0x00, 0x01, 0x9e, 0x90, 0x1a, 0xb5, 0x08, 0xf3,
0x00, 0x01, 0x00, 0x08, 0x00, 0x01, 0xbf, 0x82, 0x3b, 0xa7, 0xac, 0xb1, 0x80, 0x2b, 0x00, 0x08,
0x00, 0x01, 0x0d, 0x96, 0x67, 0x1d, 0x42, 0xf3, 0x80, 0x22, 0x00, 0x1a, 0x43, 0x6f, 0x74, 0x75,
0x72, 0x6e, 0x2d, 0x34, 0x2e, 0x35, 0x2e, 0x30, 0x2e, 0x33, 0x20, 0x27, 0x64, 0x61, 0x6e, 0x20,
0x45, 0x69, 0x64, 0x65, 0x72, 0x27, 0x77, 0x75};
STUNv2Message stunMessage = STUNv2Message.ParseSTUNMessage(stunResp, stunResp.Length);
STUNv2Header stunHeader = stunMessage.Header;
Console.WriteLine("Request type = " + stunHeader.MessageType + ".");
Console.WriteLine("Length = " + stunHeader.MessageLength + ".");
Console.WriteLine("Transaction ID = " + BitConverter.ToString(stunHeader.TransactionId) + ".");
foreach (STUNv2Attribute attribute in stunMessage.Attributes)
{
if (attribute.AttributeType == STUNv2AttributeTypesEnum.MappedAddress)
{
STUNv2AddressAttribute addressAttribute = new STUNv2AddressAttribute(attribute.Value);
Console.WriteLine(" " + attribute.AttributeType + " " + addressAttribute.Address + ":" + addressAttribute.Port + ".");
Assert.AreEqual("59.167.172.177", addressAttribute.Address.ToString());
Assert.AreEqual(49026, addressAttribute.Port);
}
else if (attribute.AttributeType == STUNv2AttributeTypesEnum.XORMappedAddress)
{
STUNv2XORAddressAttribute xorAddressAttribute = new STUNv2XORAddressAttribute(STUNv2AttributeTypesEnum.XORMappedAddress, attribute.Value);
Console.WriteLine(" " + attribute.AttributeType + " " + xorAddressAttribute.Address + ":" + xorAddressAttribute.Port + ".");
Assert.AreEqual("59.167.172.177", xorAddressAttribute.Address.ToString());
Assert.AreEqual(49026, xorAddressAttribute.Port);
}
else
{
Console.WriteLine(" " + attribute.AttributeType + " " + attribute.Value + ".");
}
}
Assert.AreEqual(STUNv2MessageTypesEnum.BindingSuccessResponse, stunHeader.MessageType);
}
public static List<STUNv2Attribute> ParseMessageAttributes(byte[] buffer, int startIndex, int endIndex)
{
if (buffer != null && buffer.Length > startIndex && buffer.Length >= endIndex)
{
List<STUNv2Attribute> attributes = new List<STUNv2Attribute>();
int startAttIndex = startIndex;
while (startAttIndex < endIndex)
{
UInt16 stunAttributeType = BitConverter.ToUInt16(buffer, startAttIndex);
UInt16 stunAttributeLength = BitConverter.ToUInt16(buffer, startAttIndex + 2);
byte[] stunAttributeValue = null;
if (BitConverter.IsLittleEndian)
{
stunAttributeType = Utility.ReverseEndian(stunAttributeType);
stunAttributeLength = Utility.ReverseEndian(stunAttributeLength);
}
if (stunAttributeLength > 0)
{
stunAttributeValue = new byte[stunAttributeLength];
Buffer.BlockCopy(buffer, startIndex + 4, stunAttributeValue, 0, stunAttributeLength);
}
STUNv2AttributeTypesEnum attributeType = STUNv2AttributeTypes.GetSTUNAttributeTypeForId(stunAttributeType);
STUNv2Attribute attribute = null;
if (attributeType == STUNv2AttributeTypesEnum.ChangeRequest)
{
attribute = new STUNv2ChangeRequestAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.MappedAddress)
{
attribute = new STUNv2AddressAttribute(stunAttributeValue);
}
else
{
attribute = new STUNv2Attribute(attributeType, stunAttributeLength, stunAttributeValue);
}
attributes.Add(attribute);
startAttIndex = startAttIndex + 4 + stunAttributeLength;
}
return attributes;
}
else
{
return null;
}
}
public static List <STUNv2Attribute> ParseMessageAttributes(byte[] buffer, int startIndex, int endIndex)
{
if (buffer != null && buffer.Length > startIndex && buffer.Length >= endIndex)
{
List <STUNv2Attribute> attributes = new List <STUNv2Attribute>();
int startAttIndex = startIndex;
while (startAttIndex < endIndex)
{
UInt16 stunAttributeType = BitConverter.ToUInt16(buffer, startAttIndex);
UInt16 stunAttributeLength = BitConverter.ToUInt16(buffer, startAttIndex + 2);
byte[] stunAttributeValue = null;
if (BitConverter.IsLittleEndian)
{
stunAttributeType = Utility.ReverseEndian(stunAttributeType);
stunAttributeLength = Utility.ReverseEndian(stunAttributeLength);
}
if (stunAttributeLength > 0)
{
if (stunAttributeLength + startIndex + 4 > endIndex)
{
logger.LogWarning("The attribute length on a STUN parameter was greater than the available number of bytes.");
}
else
{
stunAttributeValue = new byte[stunAttributeLength];
Buffer.BlockCopy(buffer, startAttIndex + 4, stunAttributeValue, 0, stunAttributeLength);
}
}
STUNv2AttributeTypesEnum attributeType = STUNv2AttributeTypes.GetSTUNAttributeTypeForId(stunAttributeType);
STUNv2Attribute attribute = null;
if (attributeType == STUNv2AttributeTypesEnum.ChangeRequest)
{
attribute = new STUNv2ChangeRequestAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.MappedAddress)
{
attribute = new STUNv2AddressAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.ErrorCode)
{
attribute = new STUNv2ErrorCodeAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.XORMappedAddress || attributeType == STUNv2AttributeTypesEnum.XORPeerAddress || attributeType == STUNv2AttributeTypesEnum.XORRelayedAddress)
{
attribute = new STUNv2XORAddressAttribute(attributeType, stunAttributeValue);
}
else
{
attribute = new STUNv2Attribute(attributeType, stunAttributeValue);
}
attributes.Add(attribute);
// Attributes start on 32 bit word boundaries so where an attribute length is not a multiple of 4 it gets padded.
int padding = (stunAttributeLength % 4 != 0) ? 4 - (stunAttributeLength % 4) : 0;
startAttIndex = startAttIndex + 4 + stunAttributeLength + padding;
}
return(attributes);
}
else
{
return(null);
}
}
public static List<STUNv2Attribute> ParseMessageAttributes(byte[] buffer, int startIndex, int endIndex)
{
if (buffer != null && buffer.Length > startIndex && buffer.Length >= endIndex)
{
List<STUNv2Attribute> attributes = new List<STUNv2Attribute>();
int startAttIndex = startIndex;
while (startAttIndex < endIndex)
{
UInt16 stunAttributeType = BitConverter.ToUInt16(buffer, startAttIndex);
UInt16 stunAttributeLength = BitConverter.ToUInt16(buffer, startAttIndex + 2);
byte[] stunAttributeValue = null;
if (BitConverter.IsLittleEndian)
{
stunAttributeType = Utility.ReverseEndian(stunAttributeType);
stunAttributeLength = Utility.ReverseEndian(stunAttributeLength);
}
if (stunAttributeLength > 0)
{
if (stunAttributeLength + startIndex + 4 > endIndex)
{
logger.Warn("The attribute length on a STUN parameter was greater than the available number of bytes.");
}
else
{
stunAttributeValue = new byte[stunAttributeLength];
Buffer.BlockCopy(buffer, startAttIndex + 4, stunAttributeValue, 0, stunAttributeLength);
}
}
STUNv2AttributeTypesEnum attributeType = STUNv2AttributeTypes.GetSTUNAttributeTypeForId(stunAttributeType);
STUNv2Attribute attribute = null;
if (attributeType == STUNv2AttributeTypesEnum.ChangeRequest)
{
attribute = new STUNv2ChangeRequestAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.MappedAddress)
{
attribute = new STUNv2AddressAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.ErrorCode)
{
attribute = new STUNv2ErrorCodeAttribute(stunAttributeValue);
}
else if (attributeType == STUNv2AttributeTypesEnum.XORMappedAddress || attributeType == STUNv2AttributeTypesEnum.XORPeerAddress || attributeType == STUNv2AttributeTypesEnum.XORRelayedAddress)
{
attribute = new STUNv2XORAddressAttribute(attributeType, stunAttributeValue);
}
else
{
attribute = new STUNv2Attribute(attributeType, stunAttributeValue);
}
attributes.Add(attribute);
// Attributes start on 32 bit word boundaries so where an attribute length is not a multiple of 4 it gets padded.
int padding = (stunAttributeLength % 4 != 0) ? 4 - (stunAttributeLength % 4) : 0;
startAttIndex = startAttIndex + 4 + stunAttributeLength + padding;
}
return attributes;
}
else
{
return null;
}
}
