livingcomputermuseum.IFS/PUP/Boot/BreathOfLife.cs

using IFS.Logging;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace IFS
{
    /// <summary>
    /// Implements the BreathOfLife services.
    /// It spins up a worker thread that wakes up every few seconds and broadcasts
    /// a BreathOfLife packet.    
    /// </summary>
    public class BreathOfLife
    {
        public BreathOfLife()
        {
            Log.Write(LogType.Verbose, LogComponent.BreathOfLife, "Breath Of Life service starting.  Broadcast interval is {0} milliseconds.", _bolPacketDelay);
            _bolThread = new Thread(BreathOfLifeThread);
            _bolThread.Start();
        }

        private void BreathOfLifeThread()
        {
            while (true)
            {
                //
                // Send BOL
                //            
                PUPProtocolDispatcher.Instance.Send(_bolPacket, DirectoryServices.Instance.LocalHost, _bolAddress, _bolPacketType);

                Log.Write(LogType.Verbose, LogComponent.BreathOfLife, "Breath Of Life packet sent.");

                //
                // Go to sleep.
                //
                Thread.Sleep(_bolPacketDelay);

                //
                // That's it.  Go home, do it again.
                //
            }
        }


        private Thread _bolThread;

        private const ushort _bolPacketType = 0x182;      // 602B
        private const byte _bolAddress = 0xff;            // 377B (boot address)

        private const int _bolPacketDelay = 5000;         // 5 seconds

        /// <summary>
        /// The gold-standard BOL packet, containing the Alto ethernet bootstrap code. 
        /// Note that this does not contain padding for the ethernet header, the dispatcher adds those two words.       
        /// </summary>
        private byte[] _bolPacket = 
        {
            0x25, 0x7c, 0x80, 0x00, 0x41, 0x1f, 0x84, 0x00, 0x39, 0x19, 0xe8, 0x00,
            0x62, 0x05, 0x85, 0x30, 0x29, 0x77, 0x39, 0x7a, 0x62, 0x06, 0x29, 0x75, 0x39, 0x78, 0x62, 0x06,
            0x29, 0x74, 0x39, 0x76, 0x62, 0x06, 0x21, 0x75, 0x39, 0x75, 0x62, 0x05, 0xaa, 0x90, 0x4d, 0x7b,
            0x21, 0x7e, 0x62, 0x04, 0xa7, 0x00, 0x31, 0x69, 0x42, 0x89, 0x09, 0x0e, 0x00, 0x00, 0x02, 0x00,
            0x00, 0x16, 0x00, 0xa4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x10, 0xff, 0xff, 0x5a, 0x88, 0x2b, 0x00, 0x8e, 0x00, 0x4b, 0x00, 0x43, 0x09,
            0x21, 0x67, 0x42, 0x87, 0x21, 0x64, 0x62, 0x04, 0x0d, 0x59, 0x39, 0x4f, 0x31, 0x64, 0x53, 0x86,
            0x21, 0x48, 0x43, 0x85, 0x45, 0x56, 0x85, 0x30, 0x43, 0x81, 0x21, 0x58, 0x62, 0x04, 0x23, 0x81,
            0x82, 0x0c, 0x01, 0x0c, 0x62, 0x10, 0x19, 0xdf, 0x01, 0xfb, 0x19, 0x4f, 0x01, 0xec, 0x21, 0x4f,
            0x62, 0x04, 0x31, 0x02, 0x05, 0x02, 0x00, 0x00, 0x01, 0xda, 0x39, 0x4c, 0xe5, 0x0c, 0x01, 0xe6,
            0x22, 0x01, 0x29, 0x49, 0x8d, 0x0c, 0x01, 0xe2, 0x22, 0x03, 0xe7, 0x00, 0x3a, 0x05, 0x29, 0x41,
            0x8d, 0x0d, 0xfa, 0x0c, 0x01, 0xdb, 0x22, 0x00, 0x45, 0x35, 0x39, 0x2f, 0x5d, 0x25, 0x5b, 0xfd,
            0x5b, 0xfe, 0x82, 0xc0, 0x43, 0x00, 0x21, 0x37, 0x43, 0x01, 0x21, 0x1a, 0x43, 0x02, 0xa3, 0x00,
            0x43, 0x03, 0x22, 0x06, 0x43, 0x09, 0x22, 0x07, 0x43, 0x0a, 0x22, 0x08, 0x43, 0x0b, 0x22, 0x09,
            0x43, 0x06, 0x22, 0x0a, 0x43, 0x07, 0x22, 0x0b, 0x43, 0x08, 0x1b, 0x0c, 0x0d, 0x17, 0x15, 0x1c,
            0x0d, 0x16, 0x21, 0x11, 0x29, 0x1f, 0xb8, 0x00, 0x31, 0x0f, 0x05, 0x12, 0xfe, 0x1d, 0x00, 0x16,
            0x01, 0x0d, 0x01, 0x17, 0x01, 0x77, 0x01, 0x87, 0x01, 0xff, 0xff, 0xe9, 0xff, 0xa1, 0xff, 0x80,
            0x00, 0x95, 0xff, 0x94, 0x02, 0x0b, 0x01, 0xf4, 0x01, 0x19, 0x01, 0xca, 0x01, 0x9c, 0x01, 0xdd,
            0x01, 0x89, 0x01, 0x77, 0x01, 0x74, 0x01, 0x76, 0x00, 0x1e, 0x00, 0x02, 0x00, 0x03, 0x00, 0x0d,
            0x00, 0x18, 0x00, 0xff, 0x02, 0x00, 0xff, 0xf4, 0x01, 0x1e, 0x59, 0xd9, 0x51, 0xe8, 0x21, 0xeb,
            0x41, 0xe5, 0x85, 0x30, 0x41, 0xdf, 0x21, 0xf2, 0x62, 0x04, 0x21, 0xdc, 0x8a, 0xc4, 0x01, 0x06,
            0x21, 0xe3, 0x82, 0x0c, 0x19, 0xe1, 0x01, 0xfa, 0x05, 0xca, 0x39, 0xec, 0xef, 0xc0, 0x9d, 0x0d,
            0x29, 0xea, 0x22, 0x01, 0x8d, 0x0c, 0x01, 0xec, 0x22, 0x00, 0x29, 0xc3, 0x8d, 0x0c, 0x01, 0xe8,
            0x22, 0x03, 0xe7, 0x00, 0x29, 0xde, 0x8d, 0x05, 0x01, 0x04, 0xa3, 0x00, 0x83, 0x04, 0x01, 0xe0,
            0x49, 0xcc, 0x22, 0x05, 0x45, 0xda, 0x29, 0xb4, 0xa5, 0x05, 0x01, 0x04, 0x83, 0x05, 0x09, 0x04,
            0x01, 0xd7, 0x11, 0xae, 0x39, 0xac, 0x29, 0x03, 0xa1, 0x40, 0x83, 0x04, 0x01, 0xff, 0x41, 0xb2,
            0x41, 0xb4, 0x41, 0xb4, 0x85, 0x50, 0x62, 0x04, 0x21, 0xad, 0x82, 0x0d, 0x01, 0xfe, 0x8d, 0x0d,
            0x03, 0x00, 0x19, 0x9c, 0x01, 0xf1, 0x21, 0xbb, 0x62, 0x04, 0x01, 0x00, 0x62, 0x05, 0x84, 0x00,
            0xc6, 0x00, 0x39, 0xba, 0x29, 0xb7, 0xed, 0x00, 0x62, 0x05, 0x09, 0xb8, 0x21, 0xb3, 0x39, 0xb4,
            0xe8, 0x00, 0xce, 0x00, 0x62, 0x05, 0x29, 0xf2, 0xb5, 0x0c, 0xb6, 0x00, 0x21, 0x9e, 0x39, 0x0e,
            0x82, 0x0d, 0xdd, 0x0d, 0xb2, 0x01, 0x01, 0xec, 0x29, 0xa3, 0x49, 0x95, 0x82, 0x0d, 0x01, 0xe8,
            0x19, 0x93, 0x09, 0xa4, 0x21, 0x9c, 0x62, 0x04, 0x04, 0x00, 0xfd, 0xf4, 0x03, 0x01, 0x42, 0x02,            
        };
    }
}