public static short SendEchoRequest(IPv6Address destionationIPAddress) { IPv6PseudoHeader pv6PseudoHeader = new IPv6PseudoHeader(NetworkingInterface.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 = NetworkingInterface.IPAddress; packetEchoRequest.PayloadLength = 0x10; packetEchoRequest.NextHeader = IPv6Protocol.ICMPv6; packetEchoRequest.Payload = icmpv6Packet; pingStart = DateTime.Now; isResponseTimeout = false; replyTime = -1; NetworkingInterface.SendAndWait(packetEchoRequest.ToBytes()); pingTimeout.WaitOne(5000); 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 IPv6Address(addressBytes); Array.Copy(ipv6Packet, 24, addressBytes, 0, 16); DestinationAddress = new IPv6Address(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); }