mirror of https://github.com/lwvmobile/dsd-fme.git
Moto Alias for MAC vPDU Setup;
Seperate P25 Moto Alias Block Function from Alias Decode Function; Move Code to dsd_alias.c;
This commit is contained in:
lwvmobile
parent
8cfaced4b4
commit
29ee3a5f3a
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@ -1256,9 +1256,12 @@ void dmr_gateway_identifier (uint32_t source, uint32_t target); //translate spec
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//Embedded Alias and GPS reports
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void dmr_embedded_alias_header (dsd_opts * opts, dsd_state * state, uint8_t lc_bits[]);
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void dmr_embedded_alias_blocks (dsd_opts * opts, dsd_state * state, uint8_t lc_bits[]);
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void apx_embedded_alias_test (dsd_opts * opts, dsd_state * state);
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void apx_embedded_alias_header (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t lc_bits[]);
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void apx_embedded_alias_blocks (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t lc_bits[]);
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void apx_embedded_alias_test_phase1 (dsd_opts * opts, dsd_state * state);
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void apx_embedded_alias_header_phase1 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits);
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void apx_embedded_alias_header_phase2 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits);
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void apx_embedded_alias_blocks_phase1 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits);
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void apx_embedded_alias_blocks_phase2 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits);
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void apx_embedded_alias_decode (dsd_opts * opts, dsd_state * state, uint8_t slot, int bn, uint8_t * input);
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void dmr_embedded_gps (dsd_opts * opts, dsd_state * state, uint8_t lc_bits[]);
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void apx_embedded_gps (dsd_opts * opts, dsd_state * state, uint8_t lc_bits[]);
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void lip_protocol_decoder (dsd_opts * opts, dsd_state * state, uint8_t * input);
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@ -0,0 +1,322 @@
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/*-------------------------------------------------------------------------------
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* dsd_alias.c
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* Talker Alias Handling for Various Protocols and Vendors
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*
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* LWVMOBILE
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* 2025-02 DSD-FME Florida Man Edition
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*-----------------------------------------------------------------------------*/
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#include "dsd.h"
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//Motorola P25 OTA Alias Decoding ripped/demistified from Ilya Smirnov's SDRTrunk Voodoo Code
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uint8_t moto_alias_lut[256] = {
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0xD2, 0xF6, 0xD4, 0x2B, 0x63, 0x49, 0x94, 0x5E, 0xA7, 0x5C, 0x70, 0x69, 0xF7, 0x08, 0xB1, 0x7D,
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0x38, 0xCF, 0xCC, 0xD8, 0x51, 0x8F, 0xD5, 0x93, 0x6A, 0xF3, 0xEF, 0x7E, 0xFB, 0x64, 0xF4, 0x35,
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0x27, 0x07, 0x31, 0x14, 0x87, 0x98, 0x76, 0x34, 0xCA, 0x92, 0x33, 0x1B, 0x4F, 0x8C, 0x09, 0x40,
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0x32, 0x36, 0x77, 0x12, 0xD3, 0xC3, 0x01, 0xAB, 0x72, 0x81, 0x95, 0xC9, 0xC0, 0xE9, 0x65, 0x52,
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0x24, 0x30, 0x1C, 0xDB, 0x88, 0xE8, 0x97, 0x9D, 0x58, 0x26, 0x04, 0x39, 0xAC, 0x2A, 0x9E, 0xAA,
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0x25, 0xD7, 0xCE, 0xEB, 0x96, 0xF5, 0x0E, 0x8D, 0xDC, 0xA9, 0x2F, 0xDD, 0x1F, 0xEA, 0x91, 0xB7,
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0xD6, 0x89, 0x8B, 0xD1, 0xB0, 0x99, 0x13, 0x7A, 0xE7, 0x9A, 0xB5, 0x86, 0xFF, 0x46, 0x85, 0xB2,
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0x73, 0xDA, 0xBF, 0xD0, 0x71, 0xCB, 0x4D, 0x80, 0x15, 0x67, 0x16, 0x1A, 0x20, 0x8E, 0x45, 0x3E,
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0xF2, 0x2E, 0x66, 0x90, 0x74, 0x8A, 0x6F, 0x78, 0xBB, 0x53, 0x03, 0x11, 0x68, 0xCD, 0x44, 0x17,
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0x28, 0x5F, 0x1E, 0x84, 0x75, 0x79, 0x6E, 0x9B, 0x2C, 0xBE, 0x62, 0x2D, 0xF1, 0x7C, 0xB8, 0x83,
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0xD9, 0x4E, 0x6D, 0x02, 0x61, 0x3D, 0xA8, 0x06, 0xB9, 0xF8, 0x9C, 0x37, 0x3A, 0x23, 0xC1, 0x50,
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0xED, 0x9F, 0xAF, 0x3B, 0xBD, 0x82, 0xBA, 0xA0, 0xDF, 0xC2, 0x47, 0x22, 0xF0, 0xEE, 0xA1, 0xFE,
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0xA2, 0x10, 0x5B, 0x48, 0x57, 0xA3, 0x05, 0x60, 0x7B, 0x0D, 0xF9, 0x6C, 0xB3, 0x56, 0x4C, 0xBC,
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0x29, 0xA4, 0x0F, 0xEC, 0xB6, 0xA5, 0xA6, 0x3C, 0x7F, 0x6B, 0xB4, 0x21, 0xAD, 0xAE, 0xC4, 0xC8,
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0xC5, 0x5D, 0xDE, 0xE0, 0x1D, 0x19, 0x4B, 0xC6, 0x0C, 0x3F, 0x5A, 0xC7, 0xE1, 0x59, 0x55, 0x54,
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0x4A, 0x43, 0x42, 0xE2, 0xE3, 0xFA, 0x00, 0xE4, 0xE5, 0x18, 0x41, 0x0B, 0x0A, 0xE6, 0xFC, 0xFD
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};
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void apx_embedded_alias_test_phase1 (dsd_opts * opts, dsd_state * state)
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{
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uint64_t temp_a = 0x15900FE9060100B0; uint64_t temp_b = 0x5A; //72 bits, so break into segments
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uint8_t lcw[72]; memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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temp_a = 0x179001BBEE001C70; temp_b = 0x13;
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memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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temp_a = 0x179002B9CB7D5F2D; temp_b = 0x48;
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memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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temp_a = 0x179003B23695F7ED; temp_b = 0x49;
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memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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temp_a = 0x179004B9EA998F87; temp_b = 0x48;
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memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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temp_a = 0x179005BE6DAB167F; temp_b = 0xAC;
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memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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temp_a = 0x179006B15EC2C622; temp_b = 0x2E;
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memset (lcw, 0, sizeof(lcw));
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for (uint64_t i = 0; i < 64; i++)
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lcw[i] = (temp_a >> (63-i)) & 1;
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for (uint64_t i = 0; i < 8; i++)
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lcw[i+64] = (temp_b >> (7-i)) & 1;
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p25_lcw(opts, state, lcw, 0);
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}
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void apx_embedded_alias_header_phase1 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits)
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{
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UNUSED(opts);
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uint8_t ta_len = (uint8_t)ConvertBitIntoBytes(&lc_bits[32], 8); //len in blocks of associated talker alias
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fprintf (stderr, " Block Len: %d;", ta_len);
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//use dmr_pdu_sf for storage, store entire header (will be used to verify complete reception of full alias)
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memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot])); //reset storage for header and blocks
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memcpy (state->dmr_pdu_sf[slot], lc_bits, 72*sizeof(uint8_t));
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}
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void apx_embedded_alias_blocks_phase1 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits)
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{
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UNUSED(opts);
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uint8_t bn = (uint8_t)ConvertBitIntoBytes(&lc_bits[16], 8); //current block number
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uint8_t sn = (uint8_t)ConvertBitIntoBytes(&lc_bits[24], 4); //is a static value on all block sequences
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uint8_t ta_len = (uint8_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][32], 8); //len in blocks pulled from stored header
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uint16_t header = (uint16_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][0], 16); //header check, should be 0x1590
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if (ta_len == 0 || header != 0x1590) //checkdown, make sure we have an up to date header for this with a good len value
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{
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fprintf (stderr, " Missing Header");
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fprintf (stderr, " BN: %d/??;", bn);
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fprintf (stderr, " SN: %X;", sn);
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fprintf (stderr, " Partial: ");
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for (uint8_t i = 7; i < 18; i++)
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fprintf (stderr, "%0X", (uint8_t)ConvertBitIntoBytes(&lc_bits[0+(i*4)], 4));
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//clear out now stale storage
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memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot]));
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}
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else //good len and header stored
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{
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//sanity check, bn cannot equal zero (this shouldn't happen, but bad decode could occur)
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if (bn == 0) bn = 1;
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fprintf (stderr, " SN: %X;", sn);
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fprintf (stderr, " BN: %d/%d;", bn, ta_len);
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//use dmr_pdu_sf for storage, store data relevant portion at ptr of (bn-1) * 44 + 72 offset for header
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memcpy(state->dmr_pdu_sf[slot]+(((bn-1)*44)+72), lc_bits+28, 44*sizeof(uint8_t));
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if (ta_len == bn) //this is the last block, proceed to decoding
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{
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//pass to alias decoder
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apx_embedded_alias_decode (opts, state, slot, bn, state->dmr_pdu_sf[slot]);
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//clear out now stale storage
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memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot]));
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}
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}
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}
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void apx_embedded_alias_header_phase2 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits)
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{
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//TODO: Adjust values as needed for MAC vPDU Messages
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UNUSED(opts);
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uint8_t ta_len = (uint8_t)ConvertBitIntoBytes(&lc_bits[32], 8); //adjust when samples arrive with this in them
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fprintf (stderr, " Block Len: %d;", ta_len);
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//use dmr_pdu_sf for storage, store entire header (will be used to verify complete reception of full alias)
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memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot])); //reset storage for header and blocks
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memcpy (state->dmr_pdu_sf[slot], lc_bits, 72*sizeof(uint8_t));
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}
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void apx_embedded_alias_blocks_phase2 (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t * lc_bits)
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{
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//TODO: Adjust values as needed for MAC vPDU Messages
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UNUSED(opts);
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uint8_t bn = (uint8_t)ConvertBitIntoBytes(&lc_bits[16], 8); //current block number
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uint8_t sn = (uint8_t)ConvertBitIntoBytes(&lc_bits[24], 4); //is a static value on all block sequences
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uint8_t ta_len = (uint8_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][32], 8); //len in blocks pulled from stored header
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uint16_t header = (uint16_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][0], 16); //header check, should be 0x1590
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if (ta_len == 0 || header != 0x1590) //checkdown, make sure we have an up to date header for this with a good len value
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{
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fprintf (stderr, " Missing Header");
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fprintf (stderr, " BN: %d/??;", bn);
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fprintf (stderr, " SN: %X;", sn);
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fprintf (stderr, " Partial: ");
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for (uint8_t i = 7; i < 18; i++)
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fprintf (stderr, "%0X", (uint8_t)ConvertBitIntoBytes(&lc_bits[0+(i*4)], 4));
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//clear out now stale storage
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memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot]));
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}
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else //good len and header stored
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{
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//sanity check, bn cannot equal zero (this shouldn't happen, but bad decode could occur)
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if (bn == 0) bn = 1;
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fprintf (stderr, " SN: %X;", sn);
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fprintf (stderr, " BN: %d/%d;", bn, ta_len);
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//use dmr_pdu_sf for storage, store data relevant portion at ptr of (bn-1) * 44 + 72 offset for header
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memcpy(state->dmr_pdu_sf[slot]+(((bn-1)*44)+72), lc_bits+28, 44*sizeof(uint8_t));
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if (ta_len == bn) //this is the last block, proceed to decoding
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{
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//pass to alias decoder
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apx_embedded_alias_decode (opts, state, slot, bn, state->dmr_pdu_sf[slot]);
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//clear out now stale storage
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memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot]));
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}
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}
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}
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void apx_embedded_alias_decode (dsd_opts * opts, dsd_state * state, uint8_t slot, int bn, uint8_t * input)
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{
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UNUSED(opts);
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UNUSED(state);
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UNUSED(slot);
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//debug, let's look at byte, bit counts and see if we can find this in the completed dump
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// fprintf (stderr, " Bits: %X; Bytes: %X; Mod: %d; ", bn*44, (bn*44)/8, (bn*44)%8); //the portion with 0100 is 8 off from 0108 (hex) bits
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//debug, dump completed data set
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// fprintf (stderr, "\n Full: ");
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// for (uint8_t i = 0; i < ((bn*11)+18); i++) //double check on other bn values
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// fprintf (stderr, "%X", (uint8_t)ConvertBitIntoBytes(&input[0+(i*4)], 4));
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// fprintf (stderr, "\n");
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//extract fully qualified SUID
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uint32_t wacn = (uint32_t)ConvertBitIntoBytes(&input[72], 20);
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uint32_t sys = (uint32_t)ConvertBitIntoBytes(&input[92], 12);
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uint32_t rid = (uint32_t)ConvertBitIntoBytes(&input[104], 24);
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//print fully qualified SUID
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fprintf (stderr, "\n WACN: %05X; SYS: %03X; RID: %d;", wacn, sys, rid);
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//extract CRC
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uint16_t crc_ext = (uint16_t)ConvertBitIntoBytes(&input[(72+(bn*44)-16)], 16);
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//compute CRC
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uint16_t crc_cmp = ComputeCrcCCITT16d(&input[72], (bn*44)-16);
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//print comparison
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// fprintf (stderr, " CRC EXT: %04X CMP: %04X;", crc_ext, crc_cmp);
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if (crc_ext != crc_cmp)
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fprintf (stderr, " CRC Error;");
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// else fprintf (stderr, " Okay;");
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//start decoding the alias
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if (crc_ext == crc_cmp)
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{
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//WIP: Working, needs more samples to verify various len values
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uint16_t ptr = 128; //starting point of encoded data from test vectors
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uint8_t encoded[200]; memset(encoded, 0, sizeof(encoded));
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uint8_t decoded[200]; memset(decoded, 0, sizeof(decoded));
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uint16_t num_bytes = ((44*bn) / 8) - 9; //substract 2 CRC and 7 FQSUID
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for (int16_t i = 0; i < num_bytes; i++)
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{
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encoded[i] = (uint8_t)ConvertBitIntoBytes(&input[ptr], 8);
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ptr += 8;
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}
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uint16_t accumulator = num_bytes;
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//Ilya's Voodoo Code
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for (uint16_t i = 0; i < num_bytes; i++)
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{
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// Multiplication step 1
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uint16_t accum_mult = accumulator * 293 + 0x72E9;
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// Lookup table step
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uint8_t lut = moto_alias_lut[encoded[i]];
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uint8_t mult1 = lut - (accum_mult >> 8);
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// Incrementing step
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uint8_t mult2 = 1;
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uint8_t shortstop = accum_mult | 0x1;
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uint8_t increment = shortstop << 1;
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while(mult2 != -1 && shortstop != 1)
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{
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shortstop += increment;
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mult2 += 2;
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}
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// Multiplication step 2
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decoded[i] = mult1 * mult2;
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// Update the accumulator
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accumulator += encoded[i] + 1;
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}
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// //debug, dump just the encoded alias portion
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// fprintf (stderr, "\n Encoded: ");
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// for (int16_t i = 0; i < bytes; i++)
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// fprintf (stderr, "%02X", encoded[i]);
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// //debug, dump the decoded payload as hex octets
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// fprintf (stderr, "\n Decoded: ");
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// for (int16_t i = 0; i < bytes; i++)
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// fprintf (stderr, "%02X", decoded[i]);
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//dump the decoded payload as long chars
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// fprintf (stderr, "\n");
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fprintf (stderr, " Alias: ");
|
||||
for (int16_t i = 0; i < num_bytes/2; i++)
|
||||
fprintf (stderr, "%lc", ((decoded[(i*2)+0])<<8) | ((decoded[(i*2)+1])<<0) );
|
||||
|
||||
//For Ncurses Display (needs to be testing on real samples first to make sure this is setup right)
|
||||
// memcpy (state->dmr_embedded_gps[slot], decoded, bytes*sizeof(uint8_t));
|
||||
// state->dmr_embedded_gps[slot][199] = '\0'; //terminate string
|
||||
|
||||
}
|
||||
|
||||
//clear out now stale storage
|
||||
// memset (input, 0, sizeof (input)); //need to do this in calling function
|
||||
|
||||
}
|
||||
|
||||
//end Motorola P25 OTA Alias Decoding
|
||||
|
||||
//TODO: Migrate Other OTA Alias functions here
|
||||
230
src/dsd_gps.c
230
src/dsd_gps.c
|
|
@ -764,233 +764,3 @@ void apx_embedded_gps (dsd_opts * opts, dsd_state * state, uint8_t lc_bits[])
|
|||
|
||||
fprintf (stderr, "%s", KNRM);
|
||||
}
|
||||
|
||||
//relocate all below later on
|
||||
uint8_t alias_lut[256] = {
|
||||
0xD2, 0xF6, 0xD4, 0x2B, 0x63, 0x49, 0x94, 0x5E, 0xA7, 0x5C, 0x70, 0x69, 0xF7, 0x08, 0xB1, 0x7D,
|
||||
0x38, 0xCF, 0xCC, 0xD8, 0x51, 0x8F, 0xD5, 0x93, 0x6A, 0xF3, 0xEF, 0x7E, 0xFB, 0x64, 0xF4, 0x35,
|
||||
0x27, 0x07, 0x31, 0x14, 0x87, 0x98, 0x76, 0x34, 0xCA, 0x92, 0x33, 0x1B, 0x4F, 0x8C, 0x09, 0x40,
|
||||
0x32, 0x36, 0x77, 0x12, 0xD3, 0xC3, 0x01, 0xAB, 0x72, 0x81, 0x95, 0xC9, 0xC0, 0xE9, 0x65, 0x52,
|
||||
0x24, 0x30, 0x1C, 0xDB, 0x88, 0xE8, 0x97, 0x9D, 0x58, 0x26, 0x04, 0x39, 0xAC, 0x2A, 0x9E, 0xAA,
|
||||
0x25, 0xD7, 0xCE, 0xEB, 0x96, 0xF5, 0x0E, 0x8D, 0xDC, 0xA9, 0x2F, 0xDD, 0x1F, 0xEA, 0x91, 0xB7,
|
||||
0xD6, 0x89, 0x8B, 0xD1, 0xB0, 0x99, 0x13, 0x7A, 0xE7, 0x9A, 0xB5, 0x86, 0xFF, 0x46, 0x85, 0xB2,
|
||||
0x73, 0xDA, 0xBF, 0xD0, 0x71, 0xCB, 0x4D, 0x80, 0x15, 0x67, 0x16, 0x1A, 0x20, 0x8E, 0x45, 0x3E,
|
||||
0xF2, 0x2E, 0x66, 0x90, 0x74, 0x8A, 0x6F, 0x78, 0xBB, 0x53, 0x03, 0x11, 0x68, 0xCD, 0x44, 0x17,
|
||||
0x28, 0x5F, 0x1E, 0x84, 0x75, 0x79, 0x6E, 0x9B, 0x2C, 0xBE, 0x62, 0x2D, 0xF1, 0x7C, 0xB8, 0x83,
|
||||
0xD9, 0x4E, 0x6D, 0x02, 0x61, 0x3D, 0xA8, 0x06, 0xB9, 0xF8, 0x9C, 0x37, 0x3A, 0x23, 0xC1, 0x50,
|
||||
0xED, 0x9F, 0xAF, 0x3B, 0xBD, 0x82, 0xBA, 0xA0, 0xDF, 0xC2, 0x47, 0x22, 0xF0, 0xEE, 0xA1, 0xFE,
|
||||
0xA2, 0x10, 0x5B, 0x48, 0x57, 0xA3, 0x05, 0x60, 0x7B, 0x0D, 0xF9, 0x6C, 0xB3, 0x56, 0x4C, 0xBC,
|
||||
0x29, 0xA4, 0x0F, 0xEC, 0xB6, 0xA5, 0xA6, 0x3C, 0x7F, 0x6B, 0xB4, 0x21, 0xAD, 0xAE, 0xC4, 0xC8,
|
||||
0xC5, 0x5D, 0xDE, 0xE0, 0x1D, 0x19, 0x4B, 0xC6, 0x0C, 0x3F, 0x5A, 0xC7, 0xE1, 0x59, 0x55, 0x54,
|
||||
0x4A, 0x43, 0x42, 0xE2, 0xE3, 0xFA, 0x00, 0xE4, 0xE5, 0x18, 0x41, 0x0B, 0x0A, 0xE6, 0xFC, 0xFD
|
||||
};
|
||||
|
||||
void apx_embedded_alias_test (dsd_opts * opts, dsd_state * state)
|
||||
{
|
||||
uint64_t temp_a = 0x15900FE9060100B0; uint64_t temp_b = 0x5A; //72 bits, so break into segments
|
||||
uint8_t lcw[72]; memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
|
||||
temp_a = 0x179001BBEE001C70; temp_b = 0x13;
|
||||
memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
|
||||
temp_a = 0x179002B9CB7D5F2D; temp_b = 0x48;
|
||||
memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
|
||||
temp_a = 0x179003B23695F7ED; temp_b = 0x49;
|
||||
memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
|
||||
temp_a = 0x179004B9EA998F87; temp_b = 0x48;
|
||||
memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
|
||||
temp_a = 0x179005BE6DAB167F; temp_b = 0xAC;
|
||||
memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
|
||||
temp_a = 0x179006B15EC2C622; temp_b = 0x2E;
|
||||
memset (lcw, 0, sizeof(lcw));
|
||||
for (uint64_t i = 0; i < 64; i++)
|
||||
lcw[i] = (temp_a >> (63-i)) & 1;
|
||||
for (uint64_t i = 0; i < 8; i++)
|
||||
lcw[i+64] = (temp_b >> (7-i)) & 1;
|
||||
p25_lcw(opts, state, lcw, 0);
|
||||
}
|
||||
|
||||
void apx_embedded_alias_header (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t lc_bits[])
|
||||
{
|
||||
UNUSED(opts);
|
||||
uint8_t ta_len = (uint8_t)ConvertBitIntoBytes(&lc_bits[32], 8); //len in blocks of associated talker alias
|
||||
fprintf (stderr, " Block Len: %d;", ta_len);
|
||||
|
||||
//use dmr_pdu_sf for storage, store entire header (will be used to verify complete reception of full alias)
|
||||
memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot])); //reset storage for header and blocks
|
||||
memcpy(state->dmr_pdu_sf[slot], lc_bits, 72*sizeof(uint8_t));
|
||||
|
||||
}
|
||||
|
||||
void apx_embedded_alias_blocks (dsd_opts * opts, dsd_state * state, uint8_t slot, uint8_t lc_bits[])
|
||||
{
|
||||
UNUSED(opts);
|
||||
uint8_t bn = (uint8_t)ConvertBitIntoBytes(&lc_bits[16], 8); //current block number
|
||||
uint8_t sn = (uint8_t)ConvertBitIntoBytes(&lc_bits[24], 4); //is a static value on all block sequences
|
||||
uint8_t ta_len = (uint8_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][32], 8); //len in blocks pulled from stored header
|
||||
uint16_t header = (uint16_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][0], 16); //header check, should be 0x1590
|
||||
if (ta_len == 0 || header != 0x1590) //checkdown, make sure we have an up to date header for this with a good len value
|
||||
{
|
||||
fprintf (stderr, " Missing Header");
|
||||
fprintf (stderr, " BN: %d/??;", bn);
|
||||
fprintf (stderr, " SN: %X;", sn);
|
||||
fprintf (stderr, " Partial: ");
|
||||
for (uint8_t i = 7; i < 18; i++)
|
||||
fprintf (stderr, "%0X", (uint8_t)ConvertBitIntoBytes(&lc_bits[0+(i*4)], 4));
|
||||
|
||||
//clear out now stale storage
|
||||
memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot]));
|
||||
}
|
||||
|
||||
else //good len and header stored
|
||||
{
|
||||
|
||||
//sanity check, bn cannot equal zero (this shouldn't happen, but bad decode could occur)
|
||||
if (bn == 0) bn = 1;
|
||||
|
||||
fprintf (stderr, " SN: %X;", sn);
|
||||
fprintf (stderr, " BN: %d/%d;", bn, ta_len);
|
||||
|
||||
//use dmr_pdu_sf for storage, store data relevant portion at ptr of (bn-1) * 44 + 72 offset for header
|
||||
memcpy(state->dmr_pdu_sf[slot]+(((bn-1)*44)+72), lc_bits+28, 44*sizeof(uint8_t));
|
||||
|
||||
if (ta_len == bn) //this is the last block, proceed to decoding
|
||||
{
|
||||
|
||||
//debug, let's look at byte, bit counts and see if we can find this in the completed dump
|
||||
// fprintf (stderr, " Bits: %X; Bytes: %X; Mod: %d; ", bn*44, (bn*44)/8, (bn*44)%8); //the portion with 0100 is 8 off from 0108 (hex) bits
|
||||
|
||||
//debug, dump completed data set
|
||||
// fprintf (stderr, "\n Full: ");
|
||||
// for (uint8_t i = 0; i < ((bn*11)+18); i++) //double check on other bn values
|
||||
// fprintf (stderr, "%X", (uint8_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][0+(i*4)], 4));
|
||||
// fprintf (stderr, "\n");
|
||||
|
||||
//extract fully qualified SUID
|
||||
uint32_t wacn = (uint32_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][72], 20);
|
||||
uint32_t sys = (uint32_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][92], 12);
|
||||
uint32_t rid = (uint32_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][104], 24);
|
||||
|
||||
//print fully qualified SUID
|
||||
fprintf (stderr, "\n WACN: %05X; SYS: %03X; RID: %d;", wacn, sys, rid);
|
||||
|
||||
//extract CRC
|
||||
uint16_t crc_ext = (uint16_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][(72+(bn*44)-16)], 16);
|
||||
|
||||
//compute CRC
|
||||
uint16_t crc_cmp = ComputeCrcCCITT16d(&state->dmr_pdu_sf[slot][72], (bn*44)-16);
|
||||
|
||||
//print comparison
|
||||
// fprintf (stderr, " CRC EXT: %04X CMP: %04X;", crc_ext, crc_cmp);
|
||||
if (crc_ext != crc_cmp)
|
||||
fprintf (stderr, " CRC Error;");
|
||||
// else fprintf (stderr, " Okay;");
|
||||
|
||||
//start decoding the alias
|
||||
if (crc_ext == crc_cmp)
|
||||
{
|
||||
//WIP: Working, needs more samples to verify various len values
|
||||
uint16_t ptr = 128; //starting point of encoded data from test vectors
|
||||
uint8_t encoded[200]; memset(encoded, 0, sizeof(encoded));
|
||||
uint8_t decoded[200]; memset(decoded, 0, sizeof(decoded));
|
||||
uint16_t num_bytes = ((44*bn) / 8) - 9; //substract 2 CRC and 7 FQSUID
|
||||
|
||||
for (int16_t i = 0; i < num_bytes; i++)
|
||||
{
|
||||
encoded[i] = (uint8_t)ConvertBitIntoBytes(&state->dmr_pdu_sf[slot][ptr], 8);
|
||||
ptr += 8;
|
||||
}
|
||||
|
||||
uint16_t accumulator = num_bytes;
|
||||
|
||||
//Ilya's Voodoo Code
|
||||
for (int16_t i = 0; i < num_bytes; i++)
|
||||
{
|
||||
// Multiplication step 1
|
||||
uint16_t accum_mult = accumulator * 293 + 0x72E9;
|
||||
|
||||
// Lookup table step
|
||||
uint8_t lut = alias_lut[encoded[i]];
|
||||
uint8_t mult1 = lut - (accum_mult >> 8);
|
||||
|
||||
// Incrementing step
|
||||
uint8_t mult2 = 1;
|
||||
uint8_t shortstop = accum_mult | 0x1;
|
||||
uint8_t increment = shortstop << 1;
|
||||
|
||||
while(mult2 != -1 && shortstop != 1)
|
||||
{
|
||||
shortstop += increment;
|
||||
mult2 += 2;
|
||||
}
|
||||
|
||||
// Multiplication step 2
|
||||
decoded[i] = mult1 * mult2;
|
||||
|
||||
// Update the accumulator
|
||||
accumulator += encoded[i] + 1;
|
||||
|
||||
}
|
||||
|
||||
// //debug, dump just the encoded alias portion
|
||||
// fprintf (stderr, "\n Encoded: ");
|
||||
// for (int16_t i = 0; i < bytes; i++)
|
||||
// fprintf (stderr, "%02X", encoded[i]);
|
||||
|
||||
// //debug, dump the decoded payload as hex octets
|
||||
// fprintf (stderr, "\n Decoded: ");
|
||||
// for (int16_t i = 0; i < bytes; i++)
|
||||
// fprintf (stderr, "%02X", decoded[i]);
|
||||
|
||||
//dump the decoded payload as long chars
|
||||
// fprintf (stderr, "\n");
|
||||
fprintf (stderr, " Alias: ");
|
||||
for (int16_t i = 0; i < num_bytes/2; i++)
|
||||
fprintf (stderr, "%lc", ((decoded[(i*2)+0])<<8) | ((decoded[(i*2)+1])<<0) );
|
||||
|
||||
//For Ncurses Display (needs to be testing on real samples first to make sure this is setup right)
|
||||
// memcpy(state->dmr_embedded_gps[slot], decoded, bytes*sizeof(uint8_t));
|
||||
// state->dmr_embedded_gps[slot][199] = '\0'; //terminate string
|
||||
|
||||
}
|
||||
|
||||
//clear out now stale storage
|
||||
memset (state->dmr_pdu_sf[slot], 0, sizeof (state->dmr_pdu_sf[slot]));
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1535,7 +1535,7 @@ if (opts->audio_out_type == 0)
|
|||
}
|
||||
|
||||
//test P25 moto alias by loading in test vectors captured from a system and dumped on forum (see dsd_gps.c)
|
||||
// apx_embedded_alias_test(opts, state); //enable this to run test
|
||||
// apx_embedded_alias_test_phase1(opts, state); //enable this to run test
|
||||
|
||||
while (!exitflag)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -460,13 +460,13 @@ void p25_lcw (dsd_opts * opts, dsd_state * state, uint8_t LCW_bits[], uint8_t ir
|
|||
else if (lc_mfid == 0x90 && lc_opcode == 0x15)
|
||||
{
|
||||
fprintf (stderr, " MFID90 (Moto) Talker Alias Header");
|
||||
apx_embedded_alias_header (opts, state, 0, LCW_bits);
|
||||
apx_embedded_alias_header_phase1 (opts, state, 0, LCW_bits);
|
||||
}
|
||||
|
||||
else if (lc_mfid == 0x90 && lc_opcode == 0x17)
|
||||
{
|
||||
fprintf (stderr, " MFID90 (Moto) Talker Alias Block");
|
||||
apx_embedded_alias_blocks (opts, state, 0, LCW_bits);
|
||||
apx_embedded_alias_blocks_phase1 (opts, state, 0, LCW_bits);
|
||||
}
|
||||
|
||||
//observed format value on Harris SNDCP data channel (Phase 2 CC to Phase 1 MPDU channel)
|
||||
|
|
|
|||
|
|
@ -15,7 +15,7 @@ static const uint8_t mac_msg_len[256] = {
|
|||
0, 14, 15, 0, 0, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //2F
|
||||
5, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //3F
|
||||
9, 7, 9, 0, 9, 8, 9, 0, 10, 10, 9, 0, 10, 0, 0, 0, //4F
|
||||
0, 0, 0, 0, 9, 7, 0, 0, 10, 0, 7, 0, 10, 8, 14, 7, //5F
|
||||
0, 0, 0, 0, 9, 7, 0, 0, 10, 0, 7, 9, 10, 8, 14, 9, //5F (5B was 0, 5F was 7, changed both to 9 to match LCW, but that may not be completely accurate)
|
||||
9, 9, 0, 0, 9, 0, 0, 9, 10, 0, 7, 10, 10, 7, 0, 9, //6F
|
||||
9, 29, 9, 9, 9, 9, 10, 13, 9, 9, 9, 11, 9, 9, 0, 0, //7F
|
||||
8, 18, 0, 7, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, //8F (needed to add 81 and 8f for Harris)
|
||||
|
|
@ -1634,6 +1634,25 @@ void process_MAC_VPDU(dsd_opts * opts, dsd_state * state, int type, unsigned lon
|
|||
fprintf (stderr, "\n MFID90 Group Regroup Add Command ");
|
||||
}
|
||||
|
||||
//look for these in logs (these may need a corrected value set for 5B and 5F in len table)
|
||||
if (MAC[1+len_a] == 0x5B && MAC[2+len_a] == 0x90)
|
||||
{
|
||||
uint8_t len = MAC[3+len_a];
|
||||
uint8_t mac_bits[24*8]; memset (mac_bits, 0, sizeof(mac_bits));
|
||||
unpack_byte_array_into_bit_array((uint8_t *)MAC+len_a, mac_bits, len);
|
||||
fprintf (stderr, " MFID90 (Moto) Talker Alias Header");
|
||||
// apx_embedded_alias_header_phase2 (opts, state, state->currentslot, mac_bits);
|
||||
}
|
||||
|
||||
if (MAC[1+len_a] == 0x5F && MAC[2+len_a] == 0x90)
|
||||
{
|
||||
uint8_t len = MAC[3+len_a];
|
||||
uint8_t mac_bits[24*8]; memset (mac_bits, 0, sizeof(mac_bits));
|
||||
unpack_byte_array_into_bit_array((uint8_t *)MAC+len_a, mac_bits, len);
|
||||
fprintf (stderr, " MFID90 (Moto) Talker Alias Block");
|
||||
// apx_embedded_alias_blocks_phase2 (opts, state, state->currentslot, mac_bits);
|
||||
}
|
||||
|
||||
//System Service Broadcast
|
||||
if (MAC[1+len_a] == 0x78)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue