/*
* /// <summary>
* /// Generate next frame offset via equation = offset + 16B + included frame length, this variant includes binary reading operation
* /// </summary>
* /// <param name="offset">Starting offset of target frame in TCPD PCAP file</param>
* /// <returns></returns>
* private UInt32 CountTCPDNextFrameOffset(UInt32 offset)
* {
* return offset + 16 + GetTCPDPckIncludedLength(offset);
* }
*/
/// <summary>
/// Parses frame table of TCPD PCAP file and more importantly it initialize TCPFrameTable variable where are stored all
/// frame offsets
/// </summary>
private async Task ParseTcpdFrameTable()
{
if (!PmSupportedTypes.IsSupportedLinkType(this._pmLinkType))
{
return;
}
//sfs.RealFrames.Clear();
/* First frame starts always on 24th byte of TCPD PCAP file. Just after Globap CaptureProcessor Header */
//sfs.TCPDFrameTable = new List<uint> {24};
Int64 last = 24;
var velikost = this.BinReader.BaseStream.Length;
Int64 index = 0;
do
{
var len = this.GetTcpdPckIncludedLength(last);
await this.PmMetaFramesBufferBlock.SendAsync(new PmFramePcap(this.PmCapture, index, last, this._pmLinkType,
ConvertUnixTimeToDate(ConvertTcpdToUnixTime((int)(this.GetTcpdPckTimestampSeconds(last) + this._tcpdTimeZoneOffset),
(int)this.GetTcpdPckTimestampUseconds(last))), this.GetTcpdPckOriginalLength(last), len));
last = this.CountTcpdNextFrameOffset(last, len);
index++;
} while(last != velikost);
/* Remove last record because it is unparsable EOF */
//sfs.TCPDFrameTable.Remove(sfs.TCPDFrameTable.Last());
//PrintError(sfs.TCPDFrameTable.Count.ToString());
//PrintError("xxx"+sfs.RealFrames.Count.ToString());
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="linkLayer"></param>
/// <param name="packetData"></param>
public PmPacket(PmLinkType linkLayer, Byte[] packetData)
{
this.PacketInfo = Packet.ParsePacket(PmSupportedTypes.ConvertLinkTypeToPacketdotNet(linkLayer), packetData);
this.UpdateCalculatedOffsets();
}
