Main.cs :  » Network-Clients » SharpPcap » MultipleFiltersOnDevice » C# / CSharp Open Source

using System;
using SharpPcap;
using PacketDotNet;

namespace MultipleFiltersOnDevice{
    /// <summary>
    /// Example that shows how to apply multiple filters to the same device
    /// </summary>
    class MainClass
    {
        public static void Main(string[] args)
        {
            // Print SharpPcap version
            string ver = SharpPcap.Version.VersionString;
            Console.WriteLine("SharpPcap {0}, MultipleFiltersOnDevice", ver);

            // If no devices were found print an error
            if(LivePcapDeviceList.Instance.Count < 1)
            {
                Console.WriteLine("No devices were found on this machine");
                return;
            }

            Console.WriteLine();
            Console.WriteLine("The following devices are available on this machine:");
            Console.WriteLine("----------------------------------------------------");
            Console.WriteLine();

            int i = 0;

            // Print out the devices
            foreach(LivePcapDevice dev in LivePcapDeviceList.Instance)
            {
                /* Description */
                Console.WriteLine("{0}) {1} {2}", i, dev.Name, dev.Description);
                i++;
            }

            Console.WriteLine();
            Console.Write("-- Please choose a device to capture: ");
            i = int.Parse( Console.ReadLine() );

            int readTimeoutMilliseconds = 1000;

            var device1 = LivePcapDeviceList.Instance[i];
            var device2 = LivePcapDeviceList.New()[i]; // NOTE: the call to New()

            // Register our handler function to the 'packet arrival' event
            device1.OnPacketArrival += 
                        new PacketArrivalEventHandler( device_OnPacketArrival );
            device2.OnPacketArrival += 
                        new PacketArrivalEventHandler( device_OnPacketArrival );

            // Open the devices for capturing
            device1.Open(DeviceMode.Promiscuous, readTimeoutMilliseconds);
            device2.Open(DeviceMode.Promiscuous, readTimeoutMilliseconds);

            // set the filters
            device1.SetFilter("tcp port 80"); // http
            device2.SetFilter("udp port 53"); // dns

            Console.WriteLine();
            Console.WriteLine("-- Listening on {0}, hit 'Enter' to stop...",
                device1.Description);

            // Start the capturing process
            device1.StartCapture();
            device2.StartCapture();

            // Wait for 'Enter' from the user.
            Console.ReadLine();

            // Stop the capturing process
            device1.StopCapture();
            device2.StopCapture();

            Console.WriteLine("-- Capture stopped.");

            // Print out the device statistics
            Console.WriteLine("device1 {0}", device1.Statistics().ToString());
            Console.WriteLine("device2 {0}", device2.Statistics().ToString());

            // Close the pcap device
            device1.Close();
            device2.Close();
        }

        /// <summary>
        /// Prints the time and length of each received packet
        /// </summary>
        private static void device_OnPacketArrival(object sender, CaptureEventArgs e)
        {
            var time = e.Packet.Timeval.Date;
            var len = e.Packet.Data.Length;
            Console.WriteLine("{0}:{1}:{2},{3} Len={4}", 
                time.Hour, time.Minute, time.Second, time.Millisecond, len);
            var p = Packet.ParsePacket(e.Packet);
            Console.WriteLine(p.ToString());
        }
    }
}