コード例 #1
0
        public void Send(byte[] buffer, int length)
        {
            // make sure that a default destination IPEndpoint has been configured.
            if ((destinationIpAddress == IPv6Any) || (destinationPort == IPPortAny))
            {
                throw new SocketsException("Socket is not connected.");
            }

            UdpDatagram udpDatagram = new UdpDatagram();

            udpDatagram.DestinationPort = destinationPort;
            udpDatagram.SourcePort      = sourcePort;
            udpDatagram.AddPayload(buffer);
            udpDatagram.Checksum = 0;


            IPv6Packet packetUDP = new IPv6Packet();

            packetUDP.SourceAddress      = sourceIpAddress;
            packetUDP.DestinationAddress = destinationIpAddress;
            packetUDP.NextHeader         = IPv6Protocol.Udp;
            packetUDP.Payload            = udpDatagram;
            packetUDP.PayloadLength      = udpDatagram.Length;


            IPv6PseudoHeader ipv6PseudoHeader = new IPv6PseudoHeader(packetUDP.SourceAddress, packetUDP.DestinationAddress, packetUDP.PayloadLength, (byte)packetUDP.NextHeader);
            ushort           checkSum         = ipv6PseudoHeader.GetCheckSum();

            checkSum = NetUtilities.ComputeChecksum(checkSum, udpDatagram.ToBytes(), true);

            udpDatagram.Checksum = checkSum;

            NetworkingInterface.Send(packetUDP.ToBytes());
        }
コード例 #2
0
        public static void PacketHandler(IPv6Packet ipv6Packet)
        {
            Icmpv6Packet icmpv6Handler = (Icmpv6Packet)ipv6Packet.Payload;

            if (icmpv6Handler.Icmpv6MessageType == Icmpv6MessageType.EchoRequest)
            {
                IPv6Packet packetEchoReply = new IPv6Packet();
                packetEchoReply.SourceAddress      = ipv6Packet.DestinationAddress;
                packetEchoReply.DestinationAddress = ipv6Packet.SourceAddress;
                packetEchoReply.NextHeader         = ipv6Packet.NextHeader;
                packetEchoReply.Flow          = ipv6Packet.Flow;
                packetEchoReply.HopLimit      = ipv6Packet.HopLimit;
                packetEchoReply.PayloadLength = ipv6Packet.PayloadLength;
                packetEchoReply.TrafficClass  = ipv6Packet.TrafficClass;
                packetEchoReply.Version       = ipv6Packet.Version;


                icmpv6Handler.Icmpv6MessageType = Icmpv6MessageType.EchoReply;
                Icmpv6EchoReply icmpv6EchoReply = new Icmpv6EchoReply((Icmpv6EchoRequest)icmpv6Handler.IcmpMessage);
                icmpv6Handler.IcmpMessage = icmpv6EchoReply;

                IPv6PseudoHeader ipv6PseudoHeader = new IPv6PseudoHeader(packetEchoReply.SourceAddress, packetEchoReply.DestinationAddress, packetEchoReply.PayloadLength, (byte)packetEchoReply.NextHeader);
                ushort           checkSum         = ipv6PseudoHeader.GetCheckSum();

                byte[] icmpData = icmpv6Handler.ToBytes();
                icmpData[2] = 0;
                icmpData[3] = 0;

                checkSum = NetUtilities.ComputeChecksum(checkSum, icmpData, true);

                icmpv6Handler.Checksum = checkSum;

                packetEchoReply.Payload = icmpv6Handler;

                NetworkingInterface.Send(packetEchoReply.ToBytes());
            }
            else if (icmpv6Handler.Icmpv6MessageType == Icmpv6MessageType.EchoReply)
            {
                if (isResponseTimeout)
                {
                    return;
                }

                TimeSpan elapsed = DateTime.Now - pingStart;
                replyTime = (short)elapsed.TotalMilliseconds;
                pingTimeout.Set();
            }
        }