How can I get raw packet from client?

Question

I want to get raw packet data from client and I read this post:
C# Getting packet data
but I can't understand this line:

s.Bind(new IPEndPoint(IPAddress.Parse(strIP), 80));
log(System.Text.Encoding.ASCII.GetString(buffer, 0, bytes));

1. strIP, is that the server ip?
2. what does the log call do?

Answer 1

The strIP is the variable that holds the IP address of the endpoint.

The log() line is to log a string version of what is received - probably to a log file somewhere that is defined earlier in the code.

Answer 2

strIP = Net.Dns.GetHostEntry(Net.Dns.GetHostName()).AddressList[0].ToString();

To get your local ip address.

And the log() should be look like this.

private void log(string log)
{
    Console.WritelLine(log); //or append this text in any text file 
}

Answer 3

I suggest use the pcapDotNet library in c#. https://pcapdotnet.codeplex.com/