protected IEnumerable <Frame> GetFramesFromPcapAndDefragment(String pcapFileName)
{
var ipv4DefragmentationEngine =
new Ipv4DefragmentationEngine(this._services.GetService <ILoggerFactory>().CreateLogger <Ipv4DefragmentationEngine>());
var frames = new List <Frame>();
foreach (var(packet, timestampTicks) in this.GetPacketsFromPcap(pcapFileName))
{
Frame frame;
if (!(packet.PayloadPacket is IPPacket ipPacket))
{
continue;
}
if (ipPacket is IPv4Packet ipv4Packet && Ipv4Helpers.Ipv4PacketIsFragmented(ipv4Packet))
{
var(isDefragmentationSuccessful, defragmentedIpv4Packet, fragments) =
ipv4DefragmentationEngine.TryDefragmentFragments(FrameFactory.CreateFromIpPacket(ipv4Packet, timestampTicks));
if (!isDefragmentationSuccessful)
{
continue;
}
frame = FrameFactory.CreateFromDefragmentedIpPacket(defragmentedIpv4Packet, fragments);
}
private Boolean TryDefragmentFrame(ref Frame frame)
{
var(isDefragmentationSuccessful, defragmentedIpv4Packet, fragments) =
this._ipv4DefragmentationEngine.TryDefragmentFragments(frame);
if (!isDefragmentationSuccessful)
{
return(false);
}
frame = FrameFactory.CreateFromDefragmentedIpPacket(defragmentedIpv4Packet, fragments);
return(true);
}
private IEnumerable <Frame> GetFramesFromPcap(Uri pcapUri)
{
var ipv4DefragmentationEngine = new Ipv4DefragmentationEngine(this._loggerFactory.CreateLogger <Ipv4DefragmentationEngine>());
foreach (var(packet, timestampTicks) in this.GetPacketsFromPcap(pcapUri))
{
Frame frame;
if (!(packet.PayloadPacket is IPPacket ipPacket))
{
continue;
}
if (ipPacket is IPv4Packet ipv4Packet && Ipv4Helpers.Ipv4PacketIsFragmented(ipv4Packet))
{
var(isDefragmentationSuccessful, defragmentedIpv4Packet, fragments) =
ipv4DefragmentationEngine.TryDefragmentFragments(FrameFactory.CreateFromIpPacket(ipv4Packet, timestampTicks));
if (!isDefragmentationSuccessful)
{
continue;
}
frame = FrameFactory.CreateFromDefragmentedIpPacket(defragmentedIpv4Packet, fragments);
}