protected virtual void OnHttpPacketArrived(HttpPacketArriveEvnetArgs e)
{
HttpPacketArriveEventHandler handler = OnHttpPacketArrival;
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// Event handler for handling HTTP packet capture event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void HttpPacketArriveEvent(object sender, HttpPacketArriveEvnetArgs e)
{
HttpPacket packet = e.Packet;
foreach (KeyValuePair<string, string> pair in packet.Header)
{
// Use the packet which contain HTML code.
if (pair.Key == "Content-Type" && pair.Value == "text/html")
{
// Parsing the content of packet.
List<string> texts = parser.parse(packet.Content);
if (texts != null)
{
for (int i = 0; i < texts.Count; i++)
{
//Console.WriteLine(texts[i]);
}
}
}
}
}
private void OnPacketArrival(object sender, CaptureEventArgs e)
{
DateTime time = e.Packet.Timeval.Date;
int len = e.Packet.Data.Length;
RawCapture rawCapture = e.Packet;
Packet packet = Packet.ParsePacket(rawCapture.LinkLayerType, rawCapture.Data);
TcpPacket tcpPacket = (TcpPacket)packet.Extract(typeof(TcpPacket));
if (tcpPacket != null)
{
/// Filtering HTTP Packet using source port and desination port
if (IsHttpPacket(tcpPacket))
{
if (tcpPacket.Psh && tcpPacket.Ack)
{
seqNumbers.Enqueue(tcpPacket.AcknowledgmentNumber);
}
// If arrived packet is the first packet of the Http packet
if (IsFirstPacket(tcpPacket))
{
if (packet.PayloadPacket.PayloadPacket.PayloadData.Length != 0)
{
try
{
readyAssembleHttpPacket.Add(new HttpPacket(packet));
}
catch (ArgumentException exep)
{
// Debug.WriteLine(exep.Message);
}
}
}
else
{
foreach (HttpPacket element in readyAssembleHttpPacket)
{
if (element.NextSequenceNumber == tcpPacket.SequenceNumber && !element.IsAssembleEnded)
{
// Check assembling work is done
if(element.AssembleTcpPacket(packet))
{
HttpPacketArriveEvnetArgs packetEvent = new HttpPacketArriveEvnetArgs(element);
OnHttpPacketArrived(packetEvent);
}
}
}
}
}
}
}
protected virtual void OnHttpPacketArrived(HttpPacketArriveEvnetArgs e)
{
HttpPacketArriveEventHandler handler = OnHttpPacketArrival;
if (handler != null)
{
handler(this, e);
}
}
private void OnPacketArrival(object sender, CaptureEventArgs e)
{
DateTime time = e.Packet.Timeval.Date;
int len = e.Packet.Data.Length;
RawCapture rawCapture = e.Packet;
Packet packet = Packet.ParsePacket(rawCapture.LinkLayerType, rawCapture.Data);
TcpPacket tcpPacket = (TcpPacket)packet.Extract(typeof(TcpPacket));
if (tcpPacket != null)
{
/// Filtering HTTP Packet using source port and desination port
if (IsHttpPacket(tcpPacket))
{
if (tcpPacket.Psh && tcpPacket.Ack)
{
seqNumbers.Enqueue(tcpPacket.AcknowledgmentNumber);
}
// If arrived packet is the first packet of the Http packet
if (IsFirstPacket(tcpPacket))
{
if (packet.PayloadPacket.PayloadPacket.PayloadData.Length != 0)
{
try
{
if (tcpPacket.DestinationPort == HTTP_PORT || tcpPacket.DestinationPort == HTTPS_PORT)
{
HttpPacketArriveEvnetArgs packetEvent = new HttpPacketArriveEvnetArgs(new HttpPacket(packet));
OnHttpPacketArrived(packetEvent);
}
else
{
readyAssembleHttpPacket.Add(new HttpPacket(packet));
}
}
catch (ArgumentException exep)
{
// Debug.WriteLine(exep.Message);
}
}
}
else
{
foreach (HttpPacket element in readyAssembleHttpPacket)
{
if (element.NextSequenceNumber == tcpPacket.SequenceNumber && !element.IsAssembleEnded)
{
// Check assembling work is done
if (element.AssembleTcpPacket(packet))
{
HttpPacketArriveEvnetArgs packetEvent = new HttpPacketArriveEvnetArgs(element);
OnHttpPacketArrived(packetEvent);
}
}
}
}
}
}
}
