/// <summary>
/// Parses <see cref="RadiusPacket"/> object by parsing the specified <paramref name="buffer"/> containing a binary image.
/// </summary>
/// <param name="buffer">Buffer containing binary image to parse.</param>
/// <param name="startIndex">0-based starting index in the <paramref name="buffer"/> to start parsing.</param>
/// <param name="length">Valid number of bytes within <paramref name="buffer"/> from <paramref name="startIndex"/>.</param>
/// <returns>The number of bytes used for initialization in the <paramref name="buffer"/> (i.e., the number of bytes parsed), or 0 if not enough data.</returns>
/// <exception cref="ArgumentNullException"><paramref name="buffer"/> is null.</exception>
public int ParseBinaryImage(byte[] buffer, int startIndex, int length)
{
if ((object)buffer == null)
{
throw new ArgumentNullException("buffer");
}
int imageLength = BinaryLength;
if (length >= imageLength)
{
// Binary image has sufficient data.
UInt16 size;
m_type = (PacketType)(buffer[startIndex]);
m_identifier = buffer[startIndex + 1];
size = EndianOrder.ToUInt16(buffer, startIndex + 2);
Buffer.BlockCopy(buffer, startIndex + 4, m_authenticator, 0, m_authenticator.Length);
// Parse all attributes in the packet.
int cursor = 20;
while (cursor < size)
{
RadiusPacketAttribute attribute = new RadiusPacketAttribute(buffer, startIndex + cursor, length);
m_attributes.Add(attribute);
cursor += attribute.BinaryLength;
}
return(imageLength);
}
// Binary image does not have sufficient data.
return(0);
}
/// <summary>
/// Gets the value of the specified <paramref name="attributeType"/> if it is present in the <see cref="RadiusPacket"/>.
/// </summary>
/// <param name="attributeType"><see cref="RadiusPacketAttribute.Type"/> of the <see cref="RadiusPacketAttribute"/> whose value is to be retrieved.</param>
/// <returns><see cref="RadiusPacketAttribute"/>.<see cref="RadiusPacketAttribute.Value"/> if <see cref="RadiusPacketAttribute"/> is present; otherwise null.</returns>
public byte[] GetAttributeValue(AttributeType attributeType)
{
RadiusPacketAttribute match = m_attributes.Find(attribute => attribute.Type == attributeType);
if (match == null)
{
return(null);
}
return(match.Value);
}
/// <summary>
/// Parses <see cref="RadiusPacket"/> object by parsing the specified <paramref name="buffer"/> containing a binary image.
/// </summary>
/// <param name="buffer">Buffer containing binary image to parse.</param>
/// <param name="startIndex">0-based starting index in the <paramref name="buffer"/> to start parsing.</param>
/// <param name="length">Valid number of bytes within <paramref name="buffer"/> from <paramref name="startIndex"/>.</param>
/// <returns>The number of bytes used for initialization in the <paramref name="buffer"/> (i.e., the number of bytes parsed), or 0 if not enough data.</returns>
/// <exception cref="ArgumentNullException"><paramref name="buffer"/> is null.</exception>
public int ParseBinaryImage(byte[] buffer, int startIndex, int length)
{
if ((object)buffer == null)
throw new ArgumentNullException(nameof(buffer));
int imageLength = BinaryLength;
if (length >= imageLength)
{
// Binary image has sufficient data.
UInt16 size;
m_type = (PacketType)(buffer[startIndex]);
m_identifier = buffer[startIndex + 1];
size = EndianOrder.ToUInt16(buffer, startIndex + 2);
Buffer.BlockCopy(buffer, startIndex + 4, m_authenticator, 0, m_authenticator.Length);
// Parse all attributes in the packet.
int cursor = 20;
while (cursor < size)
{
RadiusPacketAttribute attribute = new RadiusPacketAttribute(buffer, startIndex + cursor, length);
m_attributes.Add(attribute);
cursor += attribute.BinaryLength;
}
return imageLength;
}
// Binary image does not have sufficient data.
return 0;
}
