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()); }
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; NetworkInterface.Send(packetEchoReply.ToBytes()); } else if (icmpv6Handler.Icmpv6MessageType == Icmpv6MessageType.EchoReply) { if (isResponseTimeout) { return; } TimeSpan elapsed = DateTime.UtcNow - pingStart; replyTime = (short)elapsed.TotalMilliseconds; //#if NETMF // replyTime = (short)elapsed.Milliseconds; //#else // replyTime = (short)elapsed.TotalMilliseconds; //#endif pingTimeout.Set(); } }
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); }