c486039053
The tests/ directory held 50 laboratory programs and no tests. They model channels, run hundreds of repetitions and write CSV, PNG and reports; calling that a test suite blocked introducing a real one, because any pytest run would have collected the labs and re-executed every experiment. - move all 50 lab programs to experiments/ with git mv, preserving history - rewrite the 38 cross-imports between labs from tests.labNNN to experiments.labNNN - leave tests/ empty for actual fast checks of protocol/ - point quick_gate and the hook at the new layout and add experiments/ to the syntax sweep - update the paths quoted in the Lab042 specification and the verifier agent definition This also defuses the import-time work finding without touching 41 files: the labs still create directories and write files on import, but nothing imports them now except the gate, which does so deliberately. Gate passes: syntax clean, protocol imports, 15 lab modules import, 2 functional suites run. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
146 lines
3.9 KiB
Python
146 lines
3.9 KiB
Python
"""
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Lab002. Формирование и разбор первого цифрового пакета.
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Пакет содержит:
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- маркер начала;
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- версию протокола;
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- тип сообщения;
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- порядковый номер;
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- длину полезных данных;
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- полезные данные.
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"""
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import struct
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# ============================================================
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# Константы протокола
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# ============================================================
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SYNC_WORD = 0xAA55
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PROTOCOL_VERSION = 1
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MESSAGE_TYPE_TEXT = 1
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# ============================================================
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# Исходные данные
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# ============================================================
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message = "ПРИВЕТ SDR"
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payload = message.encode("utf-8")
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sequence_number = 1
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message_type = MESSAGE_TYPE_TEXT
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payload_length = len(payload)
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# ============================================================
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# Формирование заголовка
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# ============================================================
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# Формат:
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# > — порядок байтов от старшего к младшему, big-endian
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# H — беззнаковое целое число размером 2 байта
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# B — беззнаковое целое число размером 1 байт
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# B — ещё одно число размером 1 байт
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# H — порядковый номер размером 2 байта
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# H — длина данных размером 2 байта
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HEADER_FORMAT = ">HBBHH"
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header = struct.pack(
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HEADER_FORMAT,
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SYNC_WORD,
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PROTOCOL_VERSION,
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message_type,
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sequence_number,
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payload_length,
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)
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packet = header + payload
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# ============================================================
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# Вывод сформированного пакета
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# ============================================================
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print("Исходное сообщение:")
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print(message)
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print("\nПолезная нагрузка PAYLOAD:")
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print(payload)
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print("\nДлина PAYLOAD:")
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print(payload_length, "байт")
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print("\nЗаголовок пакета:")
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print(header)
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print("\nПолный пакет:")
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print(packet)
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print("\nПакет в шестнадцатеричном виде:")
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print(packet.hex(" "))
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print("\nОбщая длина пакета:")
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print(len(packet), "байт")
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# ============================================================
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# Разбор пакета на стороне приёмника
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# ============================================================
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header_size = struct.calcsize(HEADER_FORMAT)
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received_header = packet[:header_size]
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received_payload = packet[header_size:]
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(
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received_sync,
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received_version,
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received_type,
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received_sequence,
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received_length,
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) = struct.unpack(HEADER_FORMAT, received_header)
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print("\n--- Разбор принятого пакета ---")
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print("SYNC:")
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print(hex(received_sync))
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print("\nВерсия протокола:")
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print(received_version)
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print("\nТип сообщения:")
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print(received_type)
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print("\nПорядковый номер:")
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print(received_sequence)
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print("\nДлина из заголовка:")
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print(received_length, "байт")
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print("\nФактически принято данных:")
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print(len(received_payload), "байт")
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# ============================================================
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# Проверки
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# ============================================================
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assert received_sync == SYNC_WORD
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assert received_version == PROTOCOL_VERSION
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assert received_type == MESSAGE_TYPE_TEXT
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assert received_sequence == sequence_number
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assert received_length == len(received_payload)
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restored_message = received_payload.decode("utf-8")
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assert restored_message == message
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print("\nВосстановленное сообщение:")
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print(restored_message)
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print("\nПроверка пройдена: пакет сформирован и разобран без ошибок.") |