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  • SharpPcap issue

    - by Eyla
    This is my first time to use SharpPcap library. I created new project with VC# 2008 and I added SharpPcap as a reference to my project. I post a sample code to get interface of my pc but I'm getting this error: Error 1 The type or namespace name 'PcapDeviceList' could not be found (are you missing a using directive or an assembly reference?) C:\Users\Ali\Documents\Visual Studio 2008\Projects\Pcap\Pcap\Form1.cs 28 13 Pcap please advice to solve this problem. here is my code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using SharpPcap; using SharpPcap.Packets; using SharpPcap.Protocols; using SharpPcap.Util; namespace Pcap { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { /* Retrieve the device list */ PcapDeviceList devices = SharpPcap.GetAllDevices(); /*If no device exists, print error */ if (devices.Count < 1) { Console.WriteLine("No device found on this machine"); return; } int i = 0; /* Scan the list printing every entry */ foreach (PcapDevice dev in devices) { /* Description */ label1.Text = "{0}) {1}" + i + dev.PcapDescription +"\n"+ /* Name */ "\tName:\t{0}" + dev.PcapName+"\n"+ /* IP Address */ "\tIP Address: \t\t{0}"+ dev.PcapIpAddress+"\n"+ /* Is Loopback */ "\tLoopback: \t\t{0}"+ dev.PcapLoopback; i++; } } } }

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  • SharpPcap - A Packet Capture retring seding messesge problem.

    - by Eyla
    I trying to capture packets using SharpPcap library. I'm able to return the packets details but I'm having problem to get what the message content inside the packet. the packet using .Data to return the message and when I use it it is returning (System.Byte[]). here is the library website: http://www.codeproject.com/KB/IP/sharppcap.aspx here is my code: string packetData; private void packetCapturingThreadMethod() { Packet packet = null; int countOfPacketCaptures = 0; while ((packet = device.GetNextPacket()) != null) { packet = device.GetNextPacket(); if (packet is TCPPacket) { TCPPacket tcp = (TCPPacket)packet; myPacket tempPacket = new myPacket(); tempPacket.packetType = "TCP"; tempPacket.sourceAddress = Convert.ToString(tcp.SourceAddress); tempPacket.destinationAddress = Convert.ToString(tcp.DestinationAddress); tempPacket.sourcePort = Convert.ToString(tcp.SourcePort); tempPacket.destinationPort = Convert.ToString(tcp.DestinationPort); tempPacket.packetMessage = Convert.ToString(tcp.Data); packetsList.Add(tempPacket); packetData = "Type= TCP" + " Source Address = "+ Convert.ToString(tcp.SourceAddress)+ " Destination Address =" +Convert.ToString(tcp.DestinationAddress)+ " SourcePort =" + Convert.ToString(tcp.SourcePort)+ " SourcePort =" +Convert.ToString(tcp.DestinationPort)+ " Messeage =" + Convert.ToString(tcp.Data); txtpackets.Invoke(new UpdatetxtpacketsCallback(this.Updatetxtpackets), new object[] { packetData }); string[] row = { packetsList[countOfPacketCaptures].packetType, packetsList[countOfPacketCaptures].sourceAddress, packetsList[countOfPacketCaptures].destinationAddress, packetsList[countOfPacketCaptures].sourcePort, packetsList[countOfPacketCaptures].destinationPort, packetsList[countOfPacketCaptures].packetMessage }; try { //dgwPacketInfo.Rows.Add(row); countOfPacketCaptures++; //lblCapturesLabels.Text = Convert.ToString(countOfPacketCaptures); } catch (Exception e) { } } else if (packet is UDPPacket) { UDPPacket udp = (UDPPacket)packet; myPacket tempPacket = new myPacket(); tempPacket.packetType = "UDP"; tempPacket.sourceAddress = Convert.ToString(udp.SourceAddress); tempPacket.destinationAddress = Convert.ToString(udp.DestinationAddress); tempPacket.sourcePort = Convert.ToString(udp.SourcePort); tempPacket.destinationPort = Convert.ToString(udp.DestinationPort); tempPacket.packetMessage = udp.Data.ToArray() + "\n"; packetsList.Add(tempPacket); packetData = "Type= UDP" + " Source Address = "+ Convert.ToString(udp.SourceAddress)+ " Destination Address =" +Convert.ToString(udp.DestinationAddress)+ " SourcePort =" + Convert.ToString(udp.SourcePort)+ " SourcePort =" +Convert.ToString(udp.DestinationPort)+ " Messeage =" + udp.Data.ToArray() + "\n"; string[] row = { packetsList[countOfPacketCaptures].packetType, packetsList[countOfPacketCaptures].sourceAddress, packetsList[countOfPacketCaptures].destinationAddress, packetsList[countOfPacketCaptures].sourcePort, packetsList[countOfPacketCaptures].destinationPort, packetsList[countOfPacketCaptures].packetMessage }; try { //dgwPacketInfo.Rows.Add(row); //countOfPacketCaptures++; //lblCapturesLabels.Text = Convert.ToString(countOfPacketCaptures); txtpackets.Invoke(new UpdatetxtpacketsCallback(this.Updatetxtpackets), new object[] { packetData }); } catch (Exception e) { } } } }

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  • SharpPcap - A Packet Capture getting messesge problem.

    - by Eyla
    I trying to capture packets using SharpPcap library. I'm able to return the packets details but I'm having problem to get what the message content inside the packet. the packet using .Data to return the message and when I use it it is returning (System.Byte[]). here is the library website: http://www.codeproject.com/KB/IP/sharppcap.aspx here is my code: string packetData; private void packetCapturingThreadMethod() { Packet packet = null; int countOfPacketCaptures = 0; while ((packet = device.GetNextPacket()) != null) { packet = device.GetNextPacket(); if (packet is TCPPacket) { TCPPacket tcp = (TCPPacket)packet; myPacket tempPacket = new myPacket(); tempPacket.packetType = "TCP"; tempPacket.sourceAddress = Convert.ToString(tcp.SourceAddress); tempPacket.destinationAddress = Convert.ToString(tcp.DestinationAddress); tempPacket.sourcePort = Convert.ToString(tcp.SourcePort); tempPacket.destinationPort = Convert.ToString(tcp.DestinationPort); tempPacket.packetMessage = Convert.ToString(tcp.Data); packetsList.Add(tempPacket); packetData = "Type= TCP" + " Source Address = "+ Convert.ToString(tcp.SourceAddress)+ " Destination Address =" +Convert.ToString(tcp.DestinationAddress)+ " SourcePort =" + Convert.ToString(tcp.SourcePort)+ " SourcePort =" +Convert.ToString(tcp.DestinationPort)+ " Messeage =" + Convert.ToString(tcp.Data); txtpackets.Invoke(new UpdatetxtpacketsCallback(this.Updatetxtpackets), new object[] { packetData }); string[] row = { packetsList[countOfPacketCaptures].packetType, packetsList[countOfPacketCaptures].sourceAddress, packetsList[countOfPacketCaptures].destinationAddress, packetsList[countOfPacketCaptures].sourcePort, packetsList[countOfPacketCaptures].destinationPort, packetsList[countOfPacketCaptures].packetMessage }; try { //dgwPacketInfo.Rows.Add(row); countOfPacketCaptures++; //lblCapturesLabels.Text = Convert.ToString(countOfPacketCaptures); } catch (Exception e) { } } else if (packet is UDPPacket) { UDPPacket udp = (UDPPacket)packet; myPacket tempPacket = new myPacket(); tempPacket.packetType = "UDP"; tempPacket.sourceAddress = Convert.ToString(udp.SourceAddress); tempPacket.destinationAddress = Convert.ToString(udp.DestinationAddress); tempPacket.sourcePort = Convert.ToString(udp.SourcePort); tempPacket.destinationPort = Convert.ToString(udp.DestinationPort); tempPacket.packetMessage = udp.Data.ToArray() + "\n"; packetsList.Add(tempPacket); packetData = "Type= UDP" + " Source Address = "+ Convert.ToString(udp.SourceAddress)+ " Destination Address =" +Convert.ToString(udp.DestinationAddress)+ " SourcePort =" + Convert.ToString(udp.SourcePort)+ " SourcePort =" +Convert.ToString(udp.DestinationPort)+ " Messeage =" + udp.Data.ToArray() + "\n"; string[] row = { packetsList[countOfPacketCaptures].packetType, packetsList[countOfPacketCaptures].sourceAddress, packetsList[countOfPacketCaptures].destinationAddress, packetsList[countOfPacketCaptures].sourcePort, packetsList[countOfPacketCaptures].destinationPort, packetsList[countOfPacketCaptures].packetMessage }; try { //dgwPacketInfo.Rows.Add(row); //countOfPacketCaptures++; //lblCapturesLabels.Text = Convert.ToString(countOfPacketCaptures); txtpackets.Invoke(new UpdatetxtpacketsCallback(this.Updatetxtpackets), new object[] { packetData }); } catch (Exception e) { } } } }

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  • How do I determine if a packet is RTP/RTCP?

    - by Chris Holmes
    I am using SharpPCap which is built on WinPCap to capture UDP traffic. My end goal is to capture the audio data from H.323 and save those phone conversations as WAV files. But first thing is first - I need to figure out what my UDP packets are crossing the NIC. SharpPCap provides a UdpPacket class that gives me access to the PayloadData of the message. But I am unsure what do with this data. It's a Byte[] array and I don't know how to go about determining if it's an RTP or RTCP packet. I've Googled this topic but there isn't much out there. Any help is appreciated.

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  • determining HTTP packets

    - by Eyla
    Greeting, how is possible to determine from captured packets using sharppcap if the packet is http packet or not? and can we determine frpm TCP packets if the packet is HTTP or not?

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  • Why packets injected with libpcap are duplicated?

    - by r0u1i
    I'm using sharppcap in order to send packets as part of a monitoring system. Usually it works well but I've encountered the strangest bug on a hosted vista machine and I would like your help. On that virtual vista machine, injected packets are duplicated. That is, if I send a ping request using libpcap, it somehow gets duplicated and I get two requests on the destination machine. The two requests are almost identical byte-wise, and the only difference between them is that the second packet's TTL field is one minus the original packet's value. Using wireshark I can see the packet gets duplicated before it (and its clone) leave the vista machine. The problem is manifested even when using other tools for injecting packets using libpcap (namely PlayCap). Any ideas?

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  • Howto convert to string and read data from TCP packet

    - by salime
    I used sharppcap to capture TCP packets. Now i wanna reconstruct HTTP packet from TCP packets but i don't know how. I read somewhere i can find start of HTTP packet in TCP data... i tried to convert byte[] TCP data to string using this code: string s = System.Text.Encoding.UTF8.GetString(tcp_pack.Data); but the string isn't readable. like a binary file that is opened with notepad. is it because the data is encrypted or code is incorrect? how can i reconstruct HTTP packet from TCP packets?

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  • Anyone had any experience with *.pcap manipulation libs?

    - by zxcvbnm
    I'm using the SharpPcap + PacketDotNet libraries to process some .pcap files and came across a bug in the way the timestamps are calculated. Take this Timeval property, which is something along these lines: PosixTimeval Timeval { DateTime Date; ulong Seconds; ulong MicroSeconds; } The problem is as follows: Suppose you have a trace open in Wireshark with one of the packets with a timestamp of "0.002". Once you open it within one of your programs, it retrieves the packet and its Timeval is setup such that Seconds = 0 and MicroSeconds = 002 = 2. This is done under the hood, so there is no way to avoid it as far as I can tell. My question is if that problem is common to other libraries (and maybe all of them?) who manipulate the pcap file format, which I think are built around the same collection of c/c++ functions, or if this is a problem only with the ones I'm using.

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  • How does one capture H.323 voice traffic on a VOIP network?

    - by Chris Holmes
    What I am trying to do is capture the WAV data of a phone conversation on a VOIP network using SharpPCap/PCap.Net. We are using the H.323 recommendation and my understanding is that voice data is located in the RTP packets. However, there is no way to heuristically determine if a UDP packet is a RTP packet, so we have to do more work before we can capture the data. The H.323 recommendation apparently uses a lot of traffic on specific TCP ports to negotiate the call before the WAV data is sent via RTP. However, I am having very little luck determining what data is actually sent on those TCP ports, when it is sent, what the packets look like, how to handle it, etc. If anyone has any information on how to go about this I'd really appreciate it. My Google-Fu seems to be failing me on this one.

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