internal ICMPEchoReply(ICMPEchoRequest request) : base(request.DestinationIP, request.SourceIP, 0, 0, request.ICMP_ID, request.ICMP_Sequence, (UInt16)(request.ICMP_DataLength)) { for (int b = 0; b < this.ICMP_DataLength; b++) { mRawData[this.dataOffset + 8 + b] = request.RawData[this.dataOffset + 8 + b]; } mRawData[this.dataOffset + 2] = 0x00; mRawData[this.dataOffset + 3] = 0x00; icmpCRC = CalcICMPCRC((UInt16)(this.ICMP_DataLength + 8)); mRawData[this.dataOffset + 2] = (byte)((icmpCRC >> 8) & 0xFF); mRawData[this.dataOffset + 3] = (byte)((icmpCRC >> 0) & 0xFF); }
internal static void ICMPHandler(byte[] packetData) { Apps.System.Debugger.debugger.Send("ICMP Handler called"); ICMPPacket icmp_packet = new ICMPPacket(packetData); switch (icmp_packet.ICMP_Type) { case 0: recvd_reply = new ICMPEchoReply(packetData); Apps.System.Debugger.debugger.Send("Received ICMP Echo reply from " + recvd_reply.SourceIP.ToString()); break; case 8: ICMPEchoRequest request = new ICMPEchoRequest(packetData); Apps.System.Debugger.debugger.Send("Received " + request.ToString()); ICMPEchoReply reply = new ICMPEchoReply(request); Apps.System.Debugger.debugger.Send("Sending ICMP Echo reply to " + reply.DestinationIP.ToString()); OutgoingBuffer.AddPacket(reply); NetworkStack.Update(); break; } }