예제 #1
0
        private void ParseExtensionHeaders()
        {
            if (_extensionHeaders != null)
            {
                return;
            }

            if (Length < HeaderLength)
            {
                _isValidExtensionHeaders = false;
                _extensionHeaders        = IpV6ExtensionHeaders.Empty;
                return;
            }
            _extensionHeaders        = new IpV6ExtensionHeaders(Subsegment(HeaderLength, RealPayloadLength), NextHeader);
            _isValidExtensionHeaders = _isValidExtensionHeaders && _extensionHeaders.IsValid;
        }
예제 #2
0
 /// <summary>
 /// True iff all the extension headers are equal to the given extension headers instance.
 /// </summary>
 public bool Equals(IpV6ExtensionHeaders other)
 {
     return(other != null && this.SequenceEqual(other));
 }
예제 #3
0
        internal static void WriteHeader(byte[] buffer, int offset,
                                         byte trafficClass, int flowLabel, ushort payloadLength, IpV4Protocol?nextHeader, IpV4Protocol?nextLayerProtocol,
                                         byte hopLimit, IpV6Address source, IpV6Address currentDestination, IpV6ExtensionHeaders extensionHeaders)
        {
            buffer.Write(offset + Offset.Version, (uint)((((DefaultVersion << 8) | trafficClass) << 20) | flowLabel), Endianity.Big);
            buffer.Write(offset + Offset.PayloadLength, payloadLength, Endianity.Big);
            IpV4Protocol actualNextHeader;

            if (nextHeader.HasValue)
            {
                actualNextHeader = nextHeader.Value;
            }
            else if (extensionHeaders.Any())
            {
                actualNextHeader = extensionHeaders.FirstHeader.Value;
            }
            else if (nextLayerProtocol.HasValue)
            {
                actualNextHeader = nextLayerProtocol.Value;
            }
            else
            {
                throw new InvalidOperationException("Can't determine next header. No extension headers and no known next layer protocol.");
            }
            buffer.Write(offset + Offset.NextHeader, (byte)actualNextHeader);
            buffer.Write(offset + Offset.HopLimit, hopLimit);
            buffer.Write(offset + Offset.SourceAddress, source, Endianity.Big);
            buffer.Write(offset + Offset.DestinationAddress, currentDestination, Endianity.Big);
            extensionHeaders.Write(buffer, offset + HeaderLength, nextLayerProtocol);
        }