public static short SendEchoRequest(IPAddress destionationIPAddress)
{
IPv6PseudoHeader pv6PseudoHeader = new IPv6PseudoHeader(NetworkInterface.IPAddress, destionationIPAddress, 0x10, 58);
ushort checkSum = pv6PseudoHeader.GetCheckSum();
byte[] packet = new byte[16];
packet[0] = 0x80;
packet[1] = 0x00;
packet[2] = 0x00; //Checksum
packet[3] = 0x00; //Checksum
packet[4] = 0x00;
packet[5] = 0x01;
packet[6] = 0x00;
packet[7] = 0x0a;
packet[8] = 0x02;
packet[9] = 0xcd;
packet[10] = 0x21;
packet[11] = 0xf2;
packet[12] = 0x00;
packet[13] = 0x00;
packet[14] = 0x00;
packet[15] = 0x00;
checkSum = NetUtilities.ComputeChecksum(checkSum, packet, true);
Icmpv6Packet icmpv6Packet = new Icmpv6Packet();
int packetIndex = 0;
icmpv6Packet.FromBytes(packet, ref packetIndex);
icmpv6Packet.Checksum = checkSum;
IPv6Packet packetEchoRequest = new IPv6Packet();
packetEchoRequest.DestinationAddress = destionationIPAddress;
packetEchoRequest.SourceAddress = NetworkInterface.IPAddress;
packetEchoRequest.PayloadLength = 0x10;
packetEchoRequest.NextHeader = IPv6Protocol.ICMPv6;
packetEchoRequest.Payload = icmpv6Packet;
pingStart = DateTime.UtcNow;
isResponseTimeout = false;
replyTime = -1;
NetworkInterface.SendAndWait(packetEchoRequest.ToBytes());
pingTimeout.WaitOne(5000, false);
if (replyTime == -1)
{
isResponseTimeout = true;
}
return(replyTime);
}
public bool FromBytes(byte[] ipv6Packet)
{
byte[] addressBytes = new byte[16];
uint tempVal = 0, tempVal2 = 0;
// Ensure byte array is large enough to contain an IPv6 header
if (ipv6Packet.Length < Ipv6HeaderLength)
{
return(false);
}
tempVal = ipv6Packet[0];
tempVal = (tempVal >> 4) & 0xF;
Version = (byte)tempVal;
tempVal = ipv6Packet[0];
tempVal = (tempVal & 0xF) >> 4;
TrafficClass = (byte)(tempVal | (uint)((ipv6Packet[1] >> 4) & 0xF));
tempVal2 = ipv6Packet[1];
tempVal2 = (tempVal2 & 0xF) << 16;
tempVal = ipv6Packet[2];
tempVal = tempVal << 8;
Flow = tempVal2 | tempVal | ipv6Packet[3];
PayloadLength = NetUtilities.ToLittleEndian(BitConverter.ToUInt16(ipv6Packet, 4));
NextHeader = (IPv6Protocol)ipv6Packet[6];
HopLimit = ipv6Packet[7];
Array.Copy(ipv6Packet, 8, addressBytes, 0, 16);
SourceAddress = new IPAddress(addressBytes);
Array.Copy(ipv6Packet, 24, addressBytes, 0, 16);
DestinationAddress = new IPAddress(addressBytes);
packetIndex += Ipv6HeaderLength;
IPv6PseudoHeader ipv6PseudoHeader = new IPv6PseudoHeader(SourceAddress, DestinationAddress, PayloadLength, (byte)NextHeader);
ushort checkSum = ipv6PseudoHeader.GetCheckSum();
if (ipv6Packet.Length > packetIndex)
{
switch (NextHeader)
{
case IPv6Protocol.ICMPv6:
Icmpv6Packet icmpv6packet = new Icmpv6Packet();
if ((icmpv6packet.FromBytes(ipv6Packet, ref packetIndex)) == false)
{
return(false);
}
Payload = icmpv6packet;
checkSum = NetUtilities.ComputeChecksum(checkSum, Payload.ToBytes(), true);
if (checkSum != 0)
{
return(false);
}
break;
case IPv6Protocol.Udp:
UdpDatagram udpDatagram = new UdpDatagram();
if ((udpDatagram.FromBytes(ipv6Packet, ref packetIndex)) == false)
{
return(false);
}
Payload = udpDatagram;
checkSum = NetUtilities.ComputeChecksum(checkSum, Payload.ToBytes(), true);
if (checkSum != 0)
{
return(false);
}
break;
}
}
return(true);
}