Use class CaptureFileReaderDevice

[xeron333]

I can write my captures to a file with the CaptureFileWriterDevice class. However, I'm trying to read these .pcap files. I see examples with the CaptureFileReaderDevice class. I tried this, but I got an error:
SharpPcap.PcapException*: 'Unable to open offline adapter: ' on the line

captureFileReader.Open();

private static void device_OnPacketArrival(object sender, PacketCapture e)
string path = "C:\\Users\\Documents\\Captures.pcap";
CaptureFileReaderDevice captureFileReader = new CaptureFileReaderDevice(path);
int packetsRead = 0;
GetPacketStatus retval;
while (packetsRead < packetsToRead)
{
captureFileReader.Open();
do
{
retval = captureFileReader.GetNextPacket(out e);
if (retval == GetPacketStatus.PacketRead) packetsRead++;
}
while (retval == GetPacketStatus.PacketRead);
}
var endTime = DateTime.Now;
Console.WriteLine(endTime);
}

[kayoub5]

• attach the pcap file you are trying to read
• format the code and exception as per https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks
• the code provided is missing the line where the reader is created/file name provided

[xeron333]

I can't attach pcap file here

[kayoub5]

put the file in a zip and attach the zip, it should work as long as the file is less than 25MB

[xeron333]

ok here the file Thanks
Captures.zip

[xeron333]

you said : "the code provided is missing the line where the reader is created/file name provided" because i did before :
string path = "C:\\Users\\Documents\\Captures.pcap";
CaptureFileWriterDevice captureFileWriter = new CaptureFileWriterDevice(path, (FileMode.OpenOrCreate));
captureFileWriter.Open(); captureFileWriter.Write(rawPacket); captureFileWriter.Close();

[kayoub5]

I was listing the errors...

[xeron333]

sorry...
You said "Because the PCAP have only one packet"

Can you tell me a little more? I've tested with other values ​​for packetsRead, and after a while the program stops with the same error:
SharpPcap.PcapException*: 'Unable to open offline adapter: ' on the line

captureFileReader.Open();

Also, you haven't told me what you think of the pcap file I sent you.
Thanks

[xeron333]

Hello, I haven't heard from you anymore, unfortunately... However, I'm coming back to you again regarding this "CaptureFileReaderDevice" class because I tried your example:
https://github.com/dotpcap/sharppcap/blob/master/Examples/ReadingCaptureFile/Program.cs

https://github.com/dotpcap/sharppcap/blob/master/Examples/ReadingCaptureFile/Program.cs

It works, but I'd like to know why you use the "device.OnPacketArrival" event to read a pcap file?
Indeed, for me, reading a file doesn't require a "device.OnPacketArrival" event.
Please give me an answer. I'm taking my time, but I like to move forward by understanding what I'm doing...

[kayoub5]

OnPacketArrival is more optimized than reading packets individually one by one using GetNextPacket, the two mechanisms are mutually exclusive, you need to choose one and stick to it.

[xeron333]

Thanks very much !