DMR-сервер: мастер Homebrew на stdlib для Pi-Star
Ядро протокола форкнуто из dmrhubv2 (~1300 строк из 31700): analyzer, server, parrot, dmr_voice, bptc. Отрезаны портал, БД, мосты, алерты, динамические подписки. Своё: конфиг, состояние, маршрутизатор, панель, установщик. Ноль зависимостей — на Debian 13 действует PEP 668, pip в систему запрещён. Две правки под Pi-Star, которых в исходном коде не было: • peer_id переписывается на получателя (байты 11-14) через хук encode_for — так делают HBlink3/HBlink4 и BrandMeister, а DMRGateway на Pi-Star стоит между MMDVMHost и сетью; • приватный вызов при неизвестном абоненте уходит всем, а не в никуда (взято из HBlink4: user cache with broadcast fallback). docs/PROTOCOL.md фиксирует, что тест-вектор auth-хеша в спецификации 2015 года ОШИБОЧЕН (посчитан от ASCII-строки соли вместо четырёх байт). Правка кода по нему сломала бы вход всем хотспотам. tests/test_e2e.py: 15 проверок настоящими UDP-кадрами MMDVMHost. Все проходят. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XvX94Vwy7vXWEuiFm1g9Av
Этот коммит содержится в:
Claude Opus 4.8
Executable
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@@ -0,0 +1,140 @@
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"""
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RadioStar — DMR BPTC(196,96) codec (pure Python).
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Ported from dmr_utils3 (N0MJS, GPL) + ETSI TS 102 361-1. Used to decode/encode
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the 96-bit payloads carried by DATA_HEADER and CSBK bursts (data headers, CSBK
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preambles, etc.). Lets the server READ and BUILD those control frames.
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A burst's 196 info bits live at burst-bit positions [0:98] + [166:264]; the
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middle 68 bits (slot type + sync) are spliced from a real burst of the same type.
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"""
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from __future__ import annotations
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# interleaver index (on-air[INDEX_181[i]] = logical[i])
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INDEX_181 = (
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0, 181, 166, 151, 136, 121, 106, 91, 76, 61, 46, 31, 16, 1, 182, 167, 152, 137,
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122, 107, 92, 77, 62, 47, 32, 17, 2, 183, 168, 153, 138, 123, 108, 93, 78, 63,
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48, 33, 18, 3, 184, 169, 154, 139, 124, 109, 94, 79, 64, 49, 34, 19, 4, 185, 170,
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155, 140, 125, 110, 95, 80, 65, 50, 35, 20, 5, 186, 171, 156, 141, 126, 111, 96,
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81, 66, 51, 36, 21, 6, 187, 172, 157, 142, 127, 112, 97, 82, 67, 52, 37, 22, 7,
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188, 173, 158, 143, 128, 113, 98, 83, 68, 53, 38, 23, 8, 189, 174, 159, 144, 129,
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114, 99, 84, 69, 54, 39, 24, 9, 190, 175, 160, 145, 130, 115, 100, 85, 70, 55, 40,
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25, 10, 191, 176, 161, 146, 131, 116, 101, 86, 71, 56, 41, 26, 11, 192, 177, 162,
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147, 132, 117, 102, 87, 72, 57, 42, 27, 12, 193, 178, 163, 148, 133, 118, 103, 88,
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73, 58, 43, 28, 13, 194, 179, 164, 149, 134, 119, 104, 89, 74, 59, 44, 29, 14,
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195, 180, 165, 150, 135, 120, 105, 90, 75, 60, 45, 30, 15)
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# the 96 data-bit positions in the deinterleaved matrix (72 LC/header + 24 RS/CRC)
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DATA_POS = [
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136, 121, 106, 91, 76, 61, 46, 31,
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152, 137, 122, 107, 92, 77, 62, 47, 32, 17, 2,
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123, 108, 93, 78, 63, 48, 33, 18, 3, 184, 169,
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94, 79, 64, 49, 34, 19, 4, 185, 170, 155, 140,
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65, 50, 35, 20, 5, 186, 171, 156, 141, 126, 111,
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36, 21, 6, 187, 172, 157, 142, 127, 112, 97, 82,
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7, 188, 173, 158, 143, 128, 113, 98, 83,
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68, 53, 174, 159, 144, 129, 114, 99, 84, 69, 54, 39,
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24, 145, 130, 115, 100, 85, 70, 55, 40, 25, 10, 191,
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]
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def _enc_15113(d):
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return [
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d[0] ^ d[1] ^ d[2] ^ d[3] ^ d[5] ^ d[7] ^ d[8],
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d[1] ^ d[2] ^ d[3] ^ d[4] ^ d[6] ^ d[8] ^ d[9],
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d[2] ^ d[3] ^ d[4] ^ d[5] ^ d[7] ^ d[9] ^ d[10],
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d[0] ^ d[1] ^ d[2] ^ d[4] ^ d[6] ^ d[7] ^ d[10],
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]
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def _enc_1393(d):
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return [
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d[0] ^ d[1] ^ d[3] ^ d[5] ^ d[6],
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d[0] ^ d[1] ^ d[2] ^ d[4] ^ d[6] ^ d[7],
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d[0] ^ d[1] ^ d[2] ^ d[3] ^ d[5] ^ d[7] ^ d[8],
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d[0] ^ d[2] ^ d[4] ^ d[5] ^ d[8],
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]
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def _bytes_to_bits(data):
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out = []
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for byte in data:
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for i in range(7, -1, -1):
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out.append((byte >> i) & 1)
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return out
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def _bits_to_bytes(bits):
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out = bytearray()
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for i in range(0, len(bits), 8):
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b = 0
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for j in range(8):
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b = (b << 1) | bits[i + j]
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out.append(b)
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return bytes(out)
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def _burst_info_bits(burst33):
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"""Extract the 196 on-air info bits from a 33-byte burst ([0:98]+[166:264])."""
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allbits = _bytes_to_bits(burst33)
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return allbits[0:98] + allbits[166:264]
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def decode(burst33: bytes) -> bytes:
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"""Decode a BPTC(196,96) burst -> 12 bytes (96 bits). No error correction.
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DATA_POS index the on-air (interleaved) info bits directly (per dmr_utils)."""
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onair = _burst_info_bits(burst33) # 196 on-air bits
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bits = [onair[p] for p in DATA_POS] # extract 96 data bits
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return _bits_to_bytes(bits)
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def encode(data12: bytes) -> list:
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"""Encode 12 bytes -> 196 on-air info bits (list)."""
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bits = _bytes_to_bits(data12) # 96 bits
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for _ in range(4):
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bits.insert(0, 0) # R0-R3
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for index in range(9):
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spos = index * 15 + 1
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epos = spos + 11
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par = _enc_15113(bits[spos:epos])
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for pbit in range(4):
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bits.insert(epos + pbit, par[pbit])
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for _ in range(60):
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bits.append(0)
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for col in range(15):
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spos = col + 1
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column = []
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for _ in range(9):
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column.append(bits[spos])
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spos += 15
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colp = _enc_1393(column)
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cpar = 136 + col
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for pbit in range(4):
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bits[cpar] = colp[pbit]
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cpar += 15
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onair = [0] * 196
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for i in range(196):
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onair[INDEX_181[i]] = bits[i] # interleave
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return onair
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def splice_into_burst(template33: bytes, onair196: list) -> bytes:
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"""Build a burst: info bits from onair196, sync+slot-type from a template burst
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of the same data type (positions [98:166])."""
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allbits = _bytes_to_bits(template33)
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allbits[0:98] = onair196[0:98]
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allbits[166:264] = onair196[98:196]
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return _bits_to_bytes(allbits)
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if __name__ == "__main__":
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# decode the captured RT-4D DATA_HEADER (TEST123, 1400001 -> 1234567)
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hdr = bytes.fromhex("157a07fb5a6681a8b2828e4b058d5d7f77fd7573388475f5803549e54a87813418")
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dec = decode(hdr)
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print("DATA_HEADER 12 bytes:", dec.hex())
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# round-trip: encode(decode) info bits must match the burst's info bits
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rt = splice_into_burst(hdr, encode(dec))
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print("round-trip burst == original:", rt == hdr)
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# decode a captured CSBK preamble
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csbk = bytes.fromhex("47e7160d92e007ac4e398c7244cd5d7f77fd757ac996047099099220839a4a9b4e")
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print("CSBK 12 bytes:", decode(csbk).hex())
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