/// <summary>
/// Marshal a chunk of captured packets into a packet list
/// </summary>
/// <param name="packetsBuffer"></param>
/// <param name="bufferEnd"></param>
/// <param name="packets"></param>
protected virtual void MarshalPackets(IntPtr packetsBuffer, IntPtr bufferEnd,
out List <RawCapture> packets)
{
RawCapture p;
var linkType = LinkType;
packets = new List <RawCapture>();
IntPtr bufferPointer = packetsBuffer;
while (bufferPointer.ToInt64() < bufferEnd.ToInt64())
{
// marshal the header
var header = new AirPcapPacketHeader(bufferPointer);
// advance the pointer to the packet data and marshal that data
// into a managed buffer
bufferPointer = new IntPtr(bufferPointer.ToInt64() + header.Hdrlen);
var pkt_data = new byte[header.Caplen];
Marshal.Copy(bufferPointer, pkt_data, 0, (int)header.Caplen);
p = new RawCapture(linkType,
new PosixTimeval(header.TsSec,
header.TsUsec),
pkt_data);
packets.Add(p);
// advance the pointer by the size of the data
// and round up to the next word offset since each frame header is on a word boundry
int alignment = 4;
var pointer = bufferPointer.ToInt64() + header.Caplen;
pointer = AirPcapDevice.RoundUp(pointer, alignment);
bufferPointer = new IntPtr(pointer);
}
}
/// <summary>
/// Marshal a chunk of captured packets into a packet list
/// </summary>
/// <param name="packetsBuffer"></param>
/// <param name="bufferEnd"></param>
/// <param name="packets"></param>
protected virtual void MarshalPackets(IntPtr packetsBuffer, IntPtr bufferEnd,
out List<RawCapture> packets)
{
RawCapture p;
var linkType = LinkType;
packets = new List<RawCapture>();
IntPtr bufferPointer = packetsBuffer;
while (bufferPointer.ToInt64() < bufferEnd.ToInt64())
{
// marshal the header
var header = new AirPcapPacketHeader(bufferPointer);
// advance the pointer to the packet data and marshal that data
// into a managed buffer
bufferPointer = new IntPtr(bufferPointer.ToInt64() + header.Hdrlen);
var pkt_data = new byte[header.Caplen];
Marshal.Copy(bufferPointer, pkt_data, 0, (int)header.Caplen);
p = new RawCapture(linkType,
new PosixTimeval(header.TsSec,
header.TsUsec),
pkt_data);
packets.Add(p);
// advance the pointer by the size of the data
// and round up to the next word offset since each frame header is on a word boundry
int alignment = 4;
var pointer = bufferPointer.ToInt64() + header.Caplen;
pointer = AirPcapDevice.RoundUp(pointer, alignment);
bufferPointer = new IntPtr(pointer);
}
}
