/*
 * Copyright (C) 2010 DSD Author
 * GPG Key ID: 0x3F1D7FD0 (74EF 430D F7F2 0A48 FCE6  F630 FAA2 635D 3F1D 7FD0)
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#include "dsd.h"
#include "p25p1_const.h"

#include "p25p1_ldu.h"
#include "p25p1_check_ldu.h"
#include "p25p1_hdu.h"


void
processLDU2 (dsd_opts * opts, dsd_state * state)
{

  //push current slot to 0, just in case swapping p2 to p1
  //or stale slot value from p2 and then decoding a pdu
  state->currentslot = 0;
  
  // extracts IMBE frames from LDU frame
  int i;
  uint8_t mi[73];
  char algid[9], kid[17];
  char lsd1[9], lsd2[9];
  int algidhex, kidhex;
  uint8_t lsd_hex1, lsd_hex2; uint8_t lowspeeddata[32]; memset (lowspeeddata, 0, sizeof(lowspeeddata));
  unsigned long long int mihex1, mihex2, mihex3;
  int status_count; int lsd1_okay, lsd2_okay = 0;
  UNUSED(mihex3);

  char hex_data[16][6];    // Data in hex-words (6 bit words). A total of 16 hex words.
  char hex_parity[8][6];   // Parity of the data, again in hex-word format. A total of 12 parity hex words.

  int irrecoverable_errors;

  AnalogSignal analog_signal_array[16*(3+2)+8*(3+2)];
  int analog_signal_index;

  analog_signal_index = 0;

  // we skip the status dibits that occur every 36 symbols
  // the first IMBE frame starts 14 symbols before next status
  // so we start counter at 36-14-1 = 21
  status_count = 21;

  state->p25vc = 9;

  if (opts->errorbars == 1)
    {
      //fprintf (stderr, "e:");
    }

  // IMBE 1
#ifdef TRACE_DSD
  state->debug_prefix_2 = '0';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // IMBE 2
#ifdef TRACE_DSD
  state->debug_prefix_2 = '1';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 2
  read_and_correct_hex_word (opts, state, &(hex_data[15][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[14][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[13][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[12][0]), &status_count, analog_signal_array, &analog_signal_index);
  analog_signal_array[0*5].sequence_broken = 1;

  // IMBE 3
#ifdef TRACE_DSD
  state->debug_prefix_2 = '2';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 3
  read_and_correct_hex_word (opts, state, &(hex_data[11][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[10][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 9][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 8][0]), &status_count, analog_signal_array, &analog_signal_index);
  analog_signal_array[4*5].sequence_broken = 1;

  // IMBE 4
#ifdef TRACE_DSD
  state->debug_prefix_2 = '3';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 4
  read_and_correct_hex_word (opts, state, &(hex_data[ 7][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 6][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 5][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 4][0]), &status_count, analog_signal_array, &analog_signal_index);
  analog_signal_array[8*5].sequence_broken = 1;

  // IMBE 5
#ifdef TRACE_DSD
  state->debug_prefix_2 = '4';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 5
  read_and_correct_hex_word (opts, state, &(hex_data[ 3][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 2][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 1][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_data[ 0][0]), &status_count, analog_signal_array, &analog_signal_index);
  analog_signal_array[12*5].sequence_broken = 1;

  // IMBE 6
#ifdef TRACE_DSD
  state->debug_prefix_2 = '5';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 6
  read_and_correct_hex_word (opts, state, &(hex_parity[ 7][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_parity[ 6][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_parity[ 5][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_parity[ 4][0]), &status_count, analog_signal_array, &analog_signal_index);
  analog_signal_array[16*5].sequence_broken = 1;

  // IMBE 7
#ifdef TRACE_DSD
  state->debug_prefix_2 = '6';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 7
  read_and_correct_hex_word (opts, state, &(hex_parity[ 3][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_parity[ 2][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_parity[ 1][0]), &status_count, analog_signal_array, &analog_signal_index);
  read_and_correct_hex_word (opts, state, &(hex_parity[ 0][0]), &status_count, analog_signal_array, &analog_signal_index);
  analog_signal_array[20*5].sequence_broken = 1;

  // IMBE 8
#ifdef TRACE_DSD
  state->debug_prefix_2 = '7';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  // Read data after IMBE 8: LSD (low speed data)
  {
    char lsd[8];
    char cyclic_parity[8];

    for (i=0; i<=6; i+=2)
      {
        read_dibit(opts, state, lsd+i, &status_count, NULL, NULL);
      }
    for (i=0; i<=6; i+=2)
      {
        read_dibit(opts, state, cyclic_parity+i, &status_count, NULL, NULL);
      }
      lsd_hex1 = 0;
    for (i=0; i<8; i++)
      {
        lsd_hex1 = lsd_hex1 << 1;
        lsd1[i] = lsd[i] + '0';
        lsd_hex1 |= (uint8_t)lsd[i];
        lowspeeddata[i+0] = (uint8_t)lsd1[i];
        lowspeeddata[i+8] = (uint8_t)cyclic_parity[i];;
      }

    for (i=0; i<=6; i+=2)
      {
        read_dibit(opts, state, lsd+i, &status_count, NULL, NULL);
      }
    for (i=0; i<=6; i+=2)
      {
        read_dibit(opts, state, cyclic_parity+i, &status_count, NULL, NULL);
      }
      lsd_hex2 = 0;
    for (i=0; i<8; i++)
      {
        lsd_hex2 = lsd_hex2 << 1;
        lsd2[i] = lsd[i] + '0';
        lsd_hex2 |= (uint8_t)lsd[i];
        lowspeeddata[i+16] = (uint8_t)lsd2[i];
        lowspeeddata[i+24] = (uint8_t)cyclic_parity[i];
      }

    // TODO: error correction of the LSD bytes... <--THIS!
    // TODO: do something useful with the LSD bytes... <--THIS!

    state->dropL += 2; //need to skip 2 here for the LSD bytes
    //same for octet counter
    state->octet_counter += 2;

  }

  // IMBE 9
#ifdef TRACE_DSD
  state->debug_prefix_2 = '8';
#endif
  process_IMBE (opts, state, &status_count);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceMS(opts, state);
  if (opts->floating_point == 0 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceSS(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 1)
    playSynthesizedVoiceFM(opts, state);
  if (opts->floating_point == 1 && opts->pulse_digi_out_channels == 2)
    playSynthesizedVoiceFS(opts, state);

  //set vc counter to 0
  state->p25vc = 0;

  //reset dropbytes -- skip first 11 for next LCW
  state->dropL = 267;
  //reset octet counter
  state->octet_counter = 0;

  if (opts->errorbars == 1)
    {
      fprintf (stderr, "\n");
    }

  if (opts->p25status == 1)
    {
      fprintf (stderr, "lsd1: %s lsd2: %s\n", lsd1, lsd2);
    }

  // trailing status symbol
  {
      int status;
      status = getDibit (opts, state) + '0';
      // TODO: do something useful with the status bits...
      UNUSED(status);
  }

  // Error correct the hex_data using Reed-Solomon hex_parity
  irrecoverable_errors = check_and_fix_reedsolomon_24_16_9((char*)hex_data, (char*)hex_parity);
  if (irrecoverable_errors == 1)
    {
      state->debug_header_critical_errors++;

      // We can correct (9-1)/2 = 4 errors. If we failed, it means that there were more than 4 errors in
      // these 12+12 words. But take into account that each hex word was already error corrected with
      // Hamming(10,6,3), which can correct 1 bits on each sequence of (6+4) bits. We could say that there
      // were 5 errors of 2 bits.
      update_error_stats(&state->p25_heuristics, 12*6+12*6, 5*2);
    }
  else
    {
      // Same comments as in processHDU. See there.

      char fixed_parity[8*6];

      // Correct the dibits that we read according with hex_data values
      correct_hamming_dibits((char*)hex_data, 16, analog_signal_array);

      // Generate again the Reed-Solomon parity
      encode_reedsolomon_24_16_9((char*)hex_data, fixed_parity);

      // Correct the dibits that we read according with the fixed parity values
      correct_hamming_dibits(fixed_parity, 8, analog_signal_array+16*(3+2));

      // Once corrected, contribute this information to the heuristics module
      contribute_to_heuristics(state->rf_mod, &(state->p25_heuristics), analog_signal_array, 16*(3+2)+8*(3+2));
    }


#ifdef HEURISTICS_DEBUG
  fprintf (stderr, "(audio errors, header errors, critical header errors) (%i,%i,%i)\n",
          state->debug_audio_errors, state->debug_header_errors, state->debug_header_critical_errors);
#endif

  // Now put the corrected data into the DSD structures

  mi[72] = 0;
  algid[8] = 0;
  kid[16] = 0;
  lsd1[8] = 0;
  lsd2[8] = 0;

  mi[ 0]   = hex_data[15][0] + '0';
  mi[ 1]   = hex_data[15][1] + '0';
  mi[ 2]   = hex_data[15][2] + '0';
  mi[ 3]   = hex_data[15][3] + '0';
  mi[ 4]   = hex_data[15][4] + '0';
  mi[ 5]   = hex_data[15][5] + '0';

  mi[ 6]   = hex_data[14][0] + '0';
  mi[ 7]   = hex_data[14][1] + '0';
  mi[ 8]   = hex_data[14][2] + '0';
  mi[ 9]   = hex_data[14][3] + '0';
  mi[10]   = hex_data[14][4] + '0';
  mi[11]   = hex_data[14][5] + '0';

  mi[12]   = hex_data[13][0] + '0';
  mi[13]   = hex_data[13][1] + '0';
  mi[14]   = hex_data[13][2] + '0';
  mi[15]   = hex_data[13][3] + '0';
  mi[16]   = hex_data[13][4] + '0';
  mi[17]   = hex_data[13][5] + '0';

  mi[18]   = hex_data[12][0] + '0';
  mi[19]   = hex_data[12][1] + '0';
  mi[20]   = hex_data[12][2] + '0';
  mi[21]   = hex_data[12][3] + '0';
  mi[22]   = hex_data[12][4] + '0';
  mi[23]   = hex_data[12][5] + '0';

  mi[24]   = hex_data[11][0] + '0';
  mi[25]   = hex_data[11][1] + '0';
  mi[26]   = hex_data[11][2] + '0';
  mi[27]   = hex_data[11][3] + '0';
  mi[28]   = hex_data[11][4] + '0';
  mi[29]   = hex_data[11][5] + '0';

  mi[30]   = hex_data[10][0] + '0';
  mi[31]   = hex_data[10][1] + '0';
  mi[32]   = hex_data[10][2] + '0';
  mi[33]   = hex_data[10][3] + '0';
  mi[34]   = hex_data[10][4] + '0';
  mi[35]   = hex_data[10][5] + '0';

  mi[36]   = hex_data[ 9][0] + '0';
  mi[37]   = hex_data[ 9][1] + '0';
  mi[38]   = hex_data[ 9][2] + '0';
  mi[39]   = hex_data[ 9][3] + '0';
  mi[40]   = hex_data[ 9][4] + '0';
  mi[41]   = hex_data[ 9][5] + '0';

  mi[42]   = hex_data[ 8][0] + '0';
  mi[43]   = hex_data[ 8][1] + '0';
  mi[44]   = hex_data[ 8][2] + '0';
  mi[45]   = hex_data[ 8][3] + '0';
  mi[46]   = hex_data[ 8][4] + '0';
  mi[47]   = hex_data[ 8][5] + '0';

  mi[48]   = hex_data[ 7][0] + '0';
  mi[49]   = hex_data[ 7][1] + '0';
  mi[50]   = hex_data[ 7][2] + '0';
  mi[51]   = hex_data[ 7][3] + '0';
  mi[52]   = hex_data[ 7][4] + '0';
  mi[53]   = hex_data[ 7][5] + '0';

  mi[54]   = hex_data[ 6][0] + '0';
  mi[55]   = hex_data[ 6][1] + '0';
  mi[56]   = hex_data[ 6][2] + '0';
  mi[57]   = hex_data[ 6][3] + '0';
  mi[58]   = hex_data[ 6][4] + '0';
  mi[59]   = hex_data[ 6][5] + '0';

  mi[60]   = hex_data[ 5][0] + '0';
  mi[61]   = hex_data[ 5][1] + '0';
  mi[62]   = hex_data[ 5][2] + '0';
  mi[63]   = hex_data[ 5][3] + '0';
  mi[64]   = hex_data[ 5][4] + '0';
  mi[65]   = hex_data[ 5][5] + '0';

  mi[66]   = hex_data[ 4][0] + '0';
  mi[67]   = hex_data[ 4][1] + '0';
  mi[68]   = hex_data[ 4][2] + '0';
  mi[69]   = hex_data[ 4][3] + '0';
  mi[70]   = hex_data[ 4][4] + '0';
  mi[71]   = hex_data[ 4][5] + '0';

  algid[0] = hex_data[ 3][0] + '0';
  algid[1] = hex_data[ 3][1] + '0';
  algid[2] = hex_data[ 3][2] + '0';
  algid[3] = hex_data[ 3][3] + '0';
  algid[4] = hex_data[ 3][4] + '0';
  algid[5] = hex_data[ 3][5] + '0';

  algid[6] = hex_data[ 2][0] + '0';
  algid[7] = hex_data[ 2][1] + '0';
  kid[0]   = hex_data[ 2][2] + '0';
  kid[1]   = hex_data[ 2][3] + '0';
  kid[2]   = hex_data[ 2][4] + '0';
  kid[3]   = hex_data[ 2][5] + '0';

  kid[4]   = hex_data[ 1][0] + '0';
  kid[5]   = hex_data[ 1][1] + '0';
  kid[6]   = hex_data[ 1][2] + '0';
  kid[7]   = hex_data[ 1][3] + '0';
  kid[8]   = hex_data[ 1][4] + '0';
  kid[9]   = hex_data[ 1][5] + '0';

  kid[10]  = hex_data[ 0][0] + '0';
  kid[11]  = hex_data[ 0][1] + '0';
  kid[12]  = hex_data[ 0][2] + '0';
  kid[13]  = hex_data[ 0][3] + '0';
  kid[14]  = hex_data[ 0][4] + '0';
  kid[15]  = hex_data[ 0][5] + '0';

  algidhex = strtol (algid, NULL, 2);
  kidhex = strtol (kid, NULL, 2);
  mihex1 = (unsigned long long int)ConvertBitIntoBytes(&mi[0], 32);
  mihex2 = (unsigned long long int)ConvertBitIntoBytes(&mi[32], 32);
  mihex3 = (unsigned long long int)ConvertBitIntoBytes(&mi[64], 8);

  //NOTE: LSD is also encrypted if voice is encrypted, so let's just zip it for now
  if (state->payload_algid != 0x80)
  {
    lsd_hex1 = 0;
    lsd_hex2 = 0;
  }

  //WIP: LSD FEC
  lsd1_okay = p25p1_lsd_fec (lowspeeddata+0);
  lsd2_okay = p25p1_lsd_fec (lowspeeddata+16);

  if (irrecoverable_errors == 0)
  {
    fprintf (stderr, "%s", KYEL);
    fprintf (stderr, " LDU2 ALG ID: 0x%02X KEY ID: 0x%04X MI: 0x%08llX%08llX", algidhex, kidhex, mihex1, mihex2);
    state->payload_algid = algidhex;
    state->payload_keyid = kidhex;
    if (mihex3) fprintf (stderr, "-%02llX", mihex3);
    if (state->R != 0 && state->payload_algid == 0xAA)
    {
      fprintf (stderr, " Key: %010llX", state->R);
      opts->unmute_encrypted_p25 = 1;
    }
    else if (state->R != 0 && state->payload_algid == 0x81)
    {
      fprintf (stderr, " Key: %010llX", state->R);
      opts->unmute_encrypted_p25 = 1;
    }
    else if (state->R != 0 && state->payload_algid == 0x9F)
    {
      fprintf (stderr, " Key: %010llX", state->R);
      opts->unmute_encrypted_p25 = 1;
    }
    /* //going to want to update this for OFB, CBC, and ECB
      { 0x84, "AES-256-OFB" },
      { 0x85, "AES-128-ECB"},
      { 0x88, "AES-CBC"},
      { 0x89, "AES-128-OFB"},
    */
    else if ( (state->payload_algid == 0x84 || state->payload_algid == 0x89) && state->aes_key_loaded[0] == 1)
    {
      fprintf (stderr, "\n ");
      fprintf (stderr, "%s", KYEL);
      fprintf (stderr, "Key: %016llX %016llX ", state->A1[0], state->A2[0]);
      if (state->payload_algid == 0x84)
        fprintf (stderr, "%016llX %016llX", state->A3[0], state->A4[0]);
      fprintf (stderr, "%s ", KNRM);
      opts->unmute_encrypted_p25 = 1;
    }
    else if (state->payload_algid != 0 && state->payload_algid != 0x80)
    {
      //may want to mute this again, or may not want to
      opts->unmute_encrypted_p25 = 0;
    }
    fprintf (stderr, "%s", KNRM);
    //only use 64 MSB, trailing 8 bits aren't used, so no mihex3
    state->payload_miP = (mihex1 << 32) | (mihex2);

    if (state->payload_algid != 0x80 && state->payload_algid != 0x0)
    {
      fprintf (stderr, "%s", KRED);
      fprintf (stderr, " ENC");
      fprintf (stderr, "%s", KNRM);
    }
  }
  else
  {
      fprintf (stderr, "%s", KRED);
      fprintf (stderr, " LDU2 FEC ERR ");
      fprintf (stderr, "%s", KNRM);
  }

  #ifdef SOFTID
  if (opts->payload == 1)
  {
    //view Low Speed Data
    fprintf (stderr, "%s",KCYN);
    fprintf (stderr, "    LSD: %02X %02X ", lsd_hex1, lsd_hex2);
    if ( (lsd_hex1 > 0x19) && (lsd_hex1 < 0x7F) && (lsd1_okay == 1) ) fprintf (stderr, "(%c", lsd_hex1);
    else fprintf (stderr, "( ");
    if ( (lsd_hex2 > 0x19) && (lsd_hex2 < 0x7F) && (lsd2_okay == 1) ) fprintf (stderr, "%c)", lsd_hex2);
    else fprintf (stderr, " )");
    if (lsd1_okay == 0) fprintf (stderr, " L1 ERR");
    if (lsd2_okay == 0) fprintf (stderr, " L2 ERR");
    fprintf (stderr, "%s", KNRM);
  }

  fprintf (stderr, "\n");

  //TEST: Store LSD into array if 0x02 0x08 (opcode and len?)
  int k = 0;
  if (state->dmr_alias_format[0] == 0x02)
  {
    k = state->data_block_counter[0];
    if ( (lsd_hex1 > 0x19) && (lsd_hex1 < 0x7F) && (lsd1_okay == 1) )
      state->dmr_alias_block_segment[0][0][k/4][k%4] = (char)lsd_hex1;
    // else state->dmr_alias_block_segment[0][0][k/4][k%4] = 0x20;
    k++;
    if ( (lsd_hex2 > 0x19) && (lsd_hex2 < 0x7F) && (lsd2_okay == 1) )
      state->dmr_alias_block_segment[0][0][k/4][k%4] = (char)lsd_hex2;
    // else state->dmr_alias_block_segment[0][0][k/4][k%4] = 0x20;
    k++;
    state->data_block_counter[0] = k;
  }

  //reset format, len, counter.
  if (lsd_hex1 == 0x02 && lsd1_okay == 1 && lsd2_okay == 1)
  {
    state->dmr_alias_format[0] = 0x02;
    if (lsd_hex2 > 8) lsd_hex2 = 8; //sanity check
    state->dmr_alias_block_len[0] = lsd_hex2;
    state->data_block_counter[0] = 0;
  }

  if ( (k >= state->dmr_alias_block_len[0]) && (state->dmr_alias_format[0] == 0x02) )
  {
    //storage for completed string
    char str[16]; int wr = 0; int tsrc = state->lastsrc; int z = 0; k = 0;
    for (i = 0; i < 16; i++) str[i] = 0;

    //print out what we've gathered
    fprintf (stderr, "%s",KCYN);
    fprintf (stderr, " LSD Soft ID: ");
    for (i = 0; i < 4; i++)
    {
      for (int j = 0; j < 4; j++)
      {
        fprintf (stderr, "%c", state->dmr_alias_block_segment[0][0][i][j]);
        if (state->dmr_alias_block_segment[0][0][i][j] != 0) str[k++] = state->dmr_alias_block_segment[0][0][i][j];
      }
    }

    //debug
    // fprintf (stderr, " STR: %s", str);

    //assign to tg name string, but only if not trunking (this could clash with ENC LO functionality)
    if (tsrc != 0) //&& opts->p25_trunk == 0 //should never get here if enc, should be zeroed out, but could potentially slip if HDU is missed and offchance of 02 opcode
    {
      for (int x = 0; x < state->group_tally; x++)
      {
        if (state->group_array[x].groupNumber == tsrc)
        {
          wr = 1; //already in there, so no need to assign it
          z = x;
          break;
        }
      }

      //if not already in there, so save it there now
      if (wr == 0)
      {
        state->group_array[state->group_tally].groupNumber = tsrc;
        if (state->payload_algid != 0x80 && opts->trunk_tune_enc_calls == 0 && state->R == 0)
          sprintf (state->group_array[state->group_tally].groupMode, "%s", "DE");
        else
         sprintf (state->group_array[state->group_tally].groupMode, "%s", "D");
        sprintf (state->group_array[state->group_tally].groupName, "%s", str);
        state->group_tally++;
      }

      //if its in there, but doesn't match (bad/partial decode)
      else if (strcmp(str, state->group_array[z].groupName) != 0)
      {
        state->group_array[z].groupNumber = tsrc;
        if (state->payload_algid != 0x80 && opts->trunk_tune_enc_calls == 0 && state->R == 0)
          sprintf (state->group_array[state->group_tally].groupMode, "%s", "DE");
        else
         sprintf (state->group_array[state->group_tally].groupMode, "%s", "D");
        sprintf (state->group_array[z].groupName, "%s", str);
      }

    }

    fprintf (stderr, "%s",KNRM);
    fprintf (stderr, "\n");

    //reset values
    state->dmr_alias_format[0] = 0;
    state->data_block_counter[0] = 0;
    state->dmr_alias_block_len[0] = 0;
    // memset (state->dmr_alias_block_segment, 0, sizeof(state->dmr_alias_block_segment));
  }
  #else
  UNUSED2(lsd1_okay, lsd2_okay);
  fprintf (stderr, "%s",KNRM);
  fprintf (stderr, "\n");
  #endif //SOFTID

  //run LFSR on the MI if we have irrecoverable errors here
  if (irrecoverable_errors && state->payload_algid != 0x80 && state->payload_keyid != 0 && state->payload_miP != 0)
  {
    LFSRP(state);
    fprintf (stderr, "\n");
  }

  //expand 64-bit MI to 128-bit for AES
  if (state->payload_algid == 0x84 || state->payload_algid == 0x89)
  {
    LFSR128(state);
    fprintf (stderr, "\n");
  }

  //xl, we need to know if the ESS is from HDU, or LDU2
  state->xl_is_hdu = 0;

  #define P25p1_ENC_LO //disable if this behavior is detremental
  #ifdef P25p1_ENC_LO
  //If trunking and tuning ENC calls is disabled, lock out and go back to CC
  int enc_lo = 1; int ttg = state->lasttg; //checking to a valid TG will help make sure we have a good LDU1 LCW or HDU first
  if (irrecoverable_errors == 0 && state->payload_algid != 0x80 && state->payload_algid != 0 && opts->p25_trunk == 1 && opts->p25_is_tuned == 1 && opts->trunk_tune_enc_calls == 0)
  {
    //NOTE: This may still cause an issue IF we havent' loaded the key yet from keyloader
    if (state->payload_algid == 0xAA && state->R != 0) enc_lo = 0;
    // else if (future condition) enc_lo = 0;
    // else if (future condition) enc_lo = 0;

    //if this is locked out by conditions above, then write it into the TG mode if we have a TG value assigned
    if (enc_lo == 1 && ttg != 0)
    {
      int xx = 0; int enc_wr = 0;
      for (xx = 0; xx < state->group_tally; xx++)
      {
        if (state->group_array[xx].groupNumber == ttg)
        {
          enc_wr = 1; //already in there, so no need to assign it
          break;
        }
      }

      //if not already in there, so save it there now
      if (enc_wr == 0)
      {
        state->group_array[state->group_tally].groupNumber = ttg;
        sprintf (state->group_array[state->group_tally].groupMode, "%s", "DE");
        sprintf (state->group_array[state->group_tally].groupName, "%s", "ENC LO"); //was xx and not state->group_tally
        state->group_tally++;
      }

      //run a watchdog here so we can update this with the crypto variables and ENC LO
      if (ttg != 0 && enc_wr == 0) //
      {
        sprintf (state->event_history_s[0].Event_History_Items[0].internal_str, "Target: %d; has been locked out; Encryption Lock Out Enabled.", ttg);
        watchdog_event_current(opts, state, 0);
      }

      //return to the control channel
      fprintf (stderr, " No Enc Following on P25p1 Trunking; Return to CC; \n");
      return_to_cc (opts, state);
    }
  }
  #endif //P25p1_ENC_LO

}

//LFSR code courtesy of https://github.com/mattames/LFSR/
void LFSRP(dsd_state * state)
{
  //rework for P2 TDMA support
  unsigned long long int lfsr = 0;
  if (state->currentslot == 0)
    lfsr = state->payload_miP;

  if (state->currentslot == 1)
    lfsr = state->payload_miN;

  int cnt = 0;
  for(cnt=0;cnt<64;cnt++)
  {
	  // Polynomial is C(x) = x^64 + x^62 + x^46 + x^38 + x^27 + x^15 + 1
    unsigned long long int bit  = ((lfsr >> 63) ^ (lfsr >> 61) ^ (lfsr >> 45) ^ (lfsr >> 37) ^ (lfsr >> 26) ^ (lfsr >> 14)) & 0x1;
    lfsr =  (lfsr << 1) | (bit);
  }

  if (state->currentslot == 0)
    state->payload_miP = lfsr;

  if (state->currentslot == 1)
    state->payload_miN = lfsr;

  //print current ENC identifiers already known and new calculated MI
  fprintf (stderr, "%s", KYEL);
  if (state->currentslot == 0)
    fprintf (stderr, "\n LDU2/ESS_B FEC ERR - ALG: 0x%02X KEY ID: 0x%04X LFSR MI: 0x%016llX", state->payload_algid, state->payload_keyid, state->payload_miP);
  if (state->currentslot == 1)
    fprintf (stderr, "\n LDU2/ESS_B FEC ERR - ALG: 0x%02X KEY ID: 0x%04X LFSR MI: 0x%016llX", state->payload_algidR, state->payload_keyidR, state->payload_miN);
  fprintf (stderr, "%s", KNRM);
}

void LFSR128(dsd_state * state)
{
  //generate a 128-bit IV from a 64-bit IV for AES blocks
  unsigned long long int lfsr = 0;

  int slot = state->currentslot;

  if (state->currentslot == 0)
    lfsr = state->payload_miP;
  else lfsr = state->payload_miN;

  //start packing aes_iv
  if (slot == 0)
  {
    state->aes_iv[0] = (lfsr >> 56) & 0xFF;
    state->aes_iv[1] = (lfsr >> 48) & 0xFF;
    state->aes_iv[2] = (lfsr >> 40) & 0xFF;
    state->aes_iv[3] = (lfsr >> 32) & 0xFF;
    state->aes_iv[4] = (lfsr >> 24) & 0xFF;
    state->aes_iv[5] = (lfsr >> 16) & 0xFF;
    state->aes_iv[6] = (lfsr >> 8 ) & 0xFF;
    state->aes_iv[7] = (lfsr >> 0 ) & 0xFF;
  }
  if (slot == 1)
  {
    state->aes_ivR[0] = (lfsr >> 56) & 0xFF;
    state->aes_ivR[1] = (lfsr >> 48) & 0xFF;
    state->aes_ivR[2] = (lfsr >> 40) & 0xFF;
    state->aes_ivR[3] = (lfsr >> 32) & 0xFF;
    state->aes_ivR[4] = (lfsr >> 24) & 0xFF;
    state->aes_ivR[5] = (lfsr >> 16) & 0xFF;
    state->aes_ivR[6] = (lfsr >> 8 ) & 0xFF;
    state->aes_ivR[7] = (lfsr >> 0 ) & 0xFF;
  }

  int cnt = 0; int x = 64;
  unsigned long long int bit;
  //polynomial P(x) = 1 + X15 + X27 + X38 + X46 + X62 + X64
  for(cnt=0;cnt<64;cnt++)
  {
    //63,61,45,37,27,14
    // Polynomial is C(x) = x^64 + x^62 + x^46 + x^38 + x^27 + x^15 + 1
    bit = ((lfsr >> 63) ^ (lfsr >> 61) ^ (lfsr >> 45) ^ (lfsr >> 37) ^ (lfsr >> 26) ^ (lfsr >> 14)) & 0x1;
    lfsr = (lfsr << 1) | bit;

    //continue packing aes_iv
    if (slot == 0)
      state->aes_iv[x/8] = (state->aes_iv[x/8] << 1) + bit;
    if (slot == 1)
      state->aes_ivR[x/8] = (state->aes_ivR[x/8] << 1) + bit;
    x++;
  }

  if (state->currentslot == 0)
  {
    fprintf (stderr, "%s", KYEL);
    if (state->dmrburstL != 27) //if not LDU2
      fprintf (stderr, "\n");
    fprintf (stderr, "     ");
    fprintf (stderr, " ALG ID: 0x%02X KEY ID: 0x%04X MI(128): 0x", state->payload_algid, state->payload_keyid);
    for (x = 0; x < 16; x++)
      fprintf (stderr, "%02X", state->aes_iv[x]);
    fprintf (stderr, "%s", KNRM);
    // fprintf (stderr, "\n");

  }

  if (state->currentslot == 1)
  {
    fprintf (stderr, "%s", KYEL);
    if (state->dmrburstL != 27) //if not LDU2, shouldn't matter on P25p2 for the second slot
      fprintf (stderr, "\n");
    fprintf (stderr, "     ");
    fprintf (stderr, " ALG ID: 0x%02X KEY ID: 0x%04X MI(128): 0x", state->payload_algidR, state->payload_keyidR);
    for (x = 0; x < 16; x++)
      fprintf (stderr, "%02X", state->aes_ivR[x]);
    fprintf (stderr, "%s", KNRM);
    // fprintf (stderr, "\n");

  }

}