protected virtual PacketsSet<T> GetPacketsSet(CapturedPacket packet)
{
var sourceDestination = new SourceDestination
{
IPSource = packet.IPSource,
PortSource = packet.Source.Port,
IPDestination = packet.IPDestination,
PortDestination = packet.Destination.Port
};
if (packetsBytes.TryGetValue(sourceDestination, out PacketsSet<T> packetsSet))
{
return packetsSet;
}
packetsSet = new PacketsSet<T>();
packetsBytes.Add(sourceDestination, packetsSet);
return packetsSet;
}
protected virtual IList<CapturedPacket> ExtractPackets(CapturedPacket packet, PacketsSet<T> packetsSet)
{
var packets = new List<CapturedPacket>();
var packetLength = 0;
var offset = 0;
if (!IsStartingPacket(packet.Bytes))
{
var lengthToComplete = packetsSet.GetLengthToCompletePacket();
if (lengthToComplete == 0 ||
lengthToComplete >= packet.Bytes.Length)
{
packets.Add(packet);
return packets;
}
var additionalPacket = packet.Bytes.Skip(lengthToComplete).ToArray();
if (IsStartingPacket(additionalPacket))
{
packetLength = lengthToComplete;
}
}
else if ((packetLength = ReadPacketLength(packet.Bytes)) >= packet.Bytes.Length || packetLength == 0)
{
packets.Add(packet);
return packets;
}
var sequenceNumber = packet.SequenceNumber;
while (offset < packet.Bytes.Length)
{
var bytes = packet.Bytes.Skip(offset).ToArray();
if (offset != 0)
{
if (!IsStartingPacket(bytes))
{
break;
}
packetLength = ReadPacketLength(bytes);
}
var subPacket = new CapturedPacket
{
Bytes = bytes.Take(packetLength).ToArray(),
CreatedTimeStamp = packet.CreatedTimeStamp,
Destination = packet.Destination,
SequenceNumber = sequenceNumber++,
Source = packet.Source
};
packets.Add(subPacket);
offset += packetLength;
if (packetLength == 0)
{
break;
}
}
return packets;
}
