public void SendMLDQuery()
{
EthernetPacket ePacket = new EthernetPacket(PhysicalAddress.Parse("98-5F-D3-3F-6D-B1"), PhysicalAddress.Parse("33-33-00-00-00-01"), EthernetPacketType.IpV6);
IPv6Packet ipPacket = new IPv6Packet(IPAddress.Parse("fe80::d0d6:8c11:a087:3941"), IPAddress.Parse("ff02::1"));
ePacket.PayloadPacket = ipPacket;
ICMPv6Packet icmp = new ICMPv6Packet(new PacketDotNet.Utils.ByteArraySegment(new byte[24]));
Array.Copy(IPAddress.Parse("ff02::1").GetAddressBytes(), 0, icmp.Header, 8, 16);
icmp.Type = ICMPv6Types.MulticastLostenerQuery;
icmp.Code = 0;
icmp.Checksum = 0;
ipPacket.PayloadPacket = icmp;
icmp.UpdateCalculatedValues();
_ncard.SendPacket(ePacket);
}
private void Ipv6ToIpv4(EthernetPacket orgPacket)
{
try
{
IPv6Packet ipv6 = (IPv6Packet)orgPacket.PayloadPacket;
if (ipv6.PayloadPacket is PacketDotNet.ICMPv6Packet)
{
ICMPv6Packet icmp = ipv6.PayloadPacket as ICMPv6Packet;
icmp.Type = ICMPv6Types.EchoReply;
icmp.UpdateCalculatedValues();
icmp.Checksum = (ushort)ChecksumUtils.OnesComplementSum(icmp.Bytes);
IPv6Packet ipv6Ack = new IPv6Packet(ipv6.DestinationAddress, ipv6.SourceAddress);
ipv6Ack.PayloadPacket = icmp;
EthernetPacket eth = new EthernetPacket(orgPacket.DestinationHwAddress, orgPacket.SourceHwAddress, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
Program.CurrentProject.data.SendPacket(eth);
}
else if (ipv6.PayloadPacket is PacketDotNet.TcpPacket)
{
TcpPacket tcp = ipv6.PayloadPacket as TcpPacket;
ushort destPort = tcp.SourcePort;
ushort sourcePort = tcp.DestinationPort;
IPAddress destAddress = ipv6.SourceAddress;
IPAddress sourceAddress = ipv6.DestinationAddress;
PhysicalAddress sourceMac = device.MacAddress;
PhysicalAddress destMac = orgPacket.SourceHwAddress;
tcp.SourcePort = sourcePort;
tcp.DestinationPort = destPort;
if (tcp.Syn && !tcp.Ack && !tcp.Rst && tcp.PayloadData.Length == 0)
{
if (sourcePort == 80)
{
tcp.Ack = true;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = tcp.SequenceNumber + 38;
tcp.WindowSize = 14600;
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
else if (sourcePort == 443)
{
tcp.Syn = false;
tcp.Ack = true;
tcp.Rst = true;
tcp.Psh = false;
uint ackOrg = tcp.AcknowledgmentNumber;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = 0;
tcp.WindowSize = 0;
tcp.PayloadData = new byte[0];
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
else if (!tcp.Syn && tcp.Ack && tcp.PayloadData != null && !tcp.Rst && tcp.PayloadData.Length > 0 && sourcePort == 80)
{
string element = string.Format("{0}/{1}", tcp.SequenceNumber, tcp.AcknowledgmentNumber);
if (!Data.Data.SlaacReqList.Contains(element))
{
Data.Data.SlaacReqList.Add(element);
HttpPacket httpReq = new HttpPacket(tcp.PayloadData);
if (httpReq.IsCompleted)
{
SendHttpResponse(httpReq, orgPacket, tcp.SourcePort, tcp.DestinationPort, tcp.AcknowledgmentNumber, tcp.SequenceNumber + (uint)tcp.PayloadData.Length);
}
else
{
lock (htppLock)
{
//incomplete packet
TcpReconstructorPacket previousPacket = (from p in Program.CurrentProject.data.ReconstructedPackets
where p.ExpectedSequenceNumber == tcp.SequenceNumber
select p).FirstOrDefault();
TcpReconstructorPacket nextPacket = (from p in Program.CurrentProject.data.ReconstructedPackets
where p.FirstSequenceNumber == tcp.SequenceNumber + tcp.PayloadData.Length
select p).FirstOrDefault();
if (nextPacket != null || previousPacket != null)
{
bool packetSend = false;
if (nextPacket != null)
{
nextPacket.InsertPreviousTcpPacket(tcp);
httpReq = new HttpPacket(nextPacket.Data);
if (httpReq.IsCompleted)
{
packetSend = true;
Program.CurrentProject.data.ReconstructedPackets.Remove(nextPacket);
SendHttpResponse(httpReq, orgPacket, tcp.SourcePort, tcp.DestinationPort, tcp.AcknowledgmentNumber, nextPacket.ExpectedSequenceNumber);
}
}
if (previousPacket != null && !packetSend)
{
if (nextPacket != null)
{
previousPacket.AppendTcpPacket(nextPacket);
Program.CurrentProject.data.ReconstructedPackets.Remove(nextPacket);
}
else
{
previousPacket.AppendTcpPacket(tcp);
}
httpReq = new HttpPacket(previousPacket.Data);
if (httpReq.IsCompleted)
{
Program.CurrentProject.data.ReconstructedPackets.Remove(previousPacket);
SendHttpResponse(httpReq, orgPacket, tcp.SourcePort, tcp.DestinationPort, tcp.AcknowledgmentNumber, previousPacket.ExpectedSequenceNumber);
}
}
}
else
{
Program.CurrentProject.data.ReconstructedPackets.Add(new TcpReconstructorPacket(tcp));
}
var toDelete = Program.CurrentProject.data.ReconstructedPackets.Where(p => DateTime.Now.Subtract(p.CreationTime).TotalMinutes > 2);
foreach (var item in toDelete)
{
Program.CurrentProject.data.ReconstructedPackets.Remove(item);
}
}
}
}
}
else if (tcp.Fin && tcp.Ack && !tcp.Rst && tcp.PayloadData.Length == 0)
{
tcp.Ack = true;
tcp.Fin = false;
uint ackOrg = tcp.AcknowledgmentNumber;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = ackOrg;
tcp.WindowSize = 1400;
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
}
catch
{
}
}