122 lines
5.3 KiB
Python
122 lines
5.3 KiB
Python
"""Runtime configuration for the backend service."""
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from __future__ import annotations
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import os
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from dataclasses import dataclass
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def _env_str(name: str, default: str) -> str:
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value = os.getenv(name)
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return value if value not in (None, "") else default
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def _env_int(name: str, default: int) -> int:
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value = os.getenv(name)
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if value in (None, ""):
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return default
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return int(value)
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def _env_float(name: str, default: float) -> float:
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value = os.getenv(name)
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if value in (None, ""):
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return default
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return float(value)
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def _env_bool(name: str, default: bool) -> bool:
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value = os.getenv(name)
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if value in (None, ""):
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return default
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return value.strip().lower() in {"1", "true", "yes", "on"}
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@dataclass(frozen=True)
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class BackendSettings:
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db_dsn: str
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log_level: str
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db_pool_min_size: int
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db_pool_max_size: int
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broadcaster_queue_maxsize: int
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packet_tracker_finalize_delay_seconds: float
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packet_tracker_retention_seconds: float
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packet_tracker_min_flush_interval_seconds: float
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packet_tracker_persist_timeout_seconds: float
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packet_tracker_stop_join_timeout_seconds: float
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packet_tracker_reject_correlation_window_seconds: float
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sniffer_buffer_capacity: int
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sniffer_socket_rcvbuf_bytes: int
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sniffer_selector_timeout_seconds: float
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sniffer_recv_bytes: int
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sniffer_buffer_drain_interval_seconds: float
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sniffer_thread_join_timeout_seconds: float
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bridge_bpf_build_dir: str
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bridge_link_state_thread_join_timeout_seconds: float
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bridge_link_state_failure_holdoff_seconds: float
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bridge_link_state_recovery_holdoff_seconds: float
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bridge_link_state_degraded_recheck_seconds: float
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telemetry_process_stop_timeout_seconds: float
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telemetry_reader_join_timeout_seconds: float
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tshark_enabled: bool
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tshark_display_filter: str
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tshark_try_heuristic_first: bool
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tshark_cache_ttl_seconds: float
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tshark_match_window_ms: int
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tshark_reader_join_timeout_seconds: float
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tshark_process_stop_timeout_seconds: float
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def load_settings() -> BackendSettings:
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return BackendSettings(
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db_dsn=_env_str("BACKEND_DB_DSN", "postgresql://mitm_user:mitm_password@localhost:5432/mitm_db"),
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log_level=_env_str("BACKEND_LOG_LEVEL", "DEBUG"),
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db_pool_min_size=_env_int("BACKEND_DB_POOL_MIN_SIZE", 1),
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db_pool_max_size=_env_int("BACKEND_DB_POOL_MAX_SIZE", 5),
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broadcaster_queue_maxsize=_env_int("BACKEND_BROADCAST_QUEUE_MAXSIZE", 1024),
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packet_tracker_finalize_delay_seconds=_env_float("BACKEND_PACKET_TRACKER_FINALIZE_DELAY_SECONDS", 0.25),
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packet_tracker_retention_seconds=_env_float("BACKEND_PACKET_TRACKER_RETENTION_SECONDS", 10.0),
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packet_tracker_min_flush_interval_seconds=_env_float("BACKEND_PACKET_TRACKER_MIN_FLUSH_INTERVAL_SECONDS", 0.05),
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packet_tracker_persist_timeout_seconds=_env_float("BACKEND_PACKET_TRACKER_PERSIST_TIMEOUT_SECONDS", 2.0),
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packet_tracker_stop_join_timeout_seconds=_env_float("BACKEND_PACKET_TRACKER_STOP_JOIN_TIMEOUT_SECONDS", 2.0),
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packet_tracker_reject_correlation_window_seconds=_env_float(
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"BACKEND_PACKET_TRACKER_REJECT_CORRELATION_WINDOW_SECONDS",
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1.0,
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),
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sniffer_buffer_capacity=_env_int("BACKEND_SNIFFER_BUFFER_CAPACITY", 20_000),
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sniffer_socket_rcvbuf_bytes=_env_int("BACKEND_SNIFFER_SOCKET_RCVBUF_BYTES", 4 * 1024 * 1024),
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sniffer_selector_timeout_seconds=_env_float("BACKEND_SNIFFER_SELECTOR_TIMEOUT_SECONDS", 1.0),
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sniffer_recv_bytes=_env_int("BACKEND_SNIFFER_RECV_BYTES", 65_536),
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sniffer_buffer_drain_interval_seconds=_env_float("BACKEND_SNIFFER_BUFFER_DRAIN_INTERVAL_SECONDS", 5.0),
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sniffer_thread_join_timeout_seconds=_env_float("BACKEND_SNIFFER_THREAD_JOIN_TIMEOUT_SECONDS", 2.0),
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bridge_bpf_build_dir=_env_str("BACKEND_BRIDGE_BPF_BUILD_DIR", "/tmp/mitm-bpf"),
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bridge_link_state_thread_join_timeout_seconds=_env_float(
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"BACKEND_BRIDGE_LINK_STATE_THREAD_JOIN_TIMEOUT_SECONDS",
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2.0,
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),
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bridge_link_state_failure_holdoff_seconds=_env_float(
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"BACKEND_BRIDGE_LINK_STATE_FAILURE_HOLDOFF_SECONDS",
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0.75,
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),
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bridge_link_state_recovery_holdoff_seconds=_env_float(
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"BACKEND_BRIDGE_LINK_STATE_RECOVERY_HOLDOFF_SECONDS",
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1.0,
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),
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bridge_link_state_degraded_recheck_seconds=_env_float(
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"BACKEND_BRIDGE_LINK_STATE_DEGRADED_RECHECK_SECONDS",
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0.5,
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),
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telemetry_process_stop_timeout_seconds=_env_float("BACKEND_TELEMETRY_PROCESS_STOP_TIMEOUT_SECONDS", 3.0),
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telemetry_reader_join_timeout_seconds=_env_float("BACKEND_TELEMETRY_READER_JOIN_TIMEOUT_SECONDS", 2.0),
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tshark_enabled=_env_bool("BACKEND_TSHARK_ENABLED", True),
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tshark_display_filter=_env_str("BACKEND_TSHARK_DISPLAY_FILTER", ""),
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tshark_try_heuristic_first=_env_bool("BACKEND_TSHARK_TRY_HEURISTIC_FIRST", True),
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tshark_cache_ttl_seconds=_env_float("BACKEND_TSHARK_CACHE_TTL_SECONDS", 5.0),
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tshark_match_window_ms=_env_int("BACKEND_TSHARK_MATCH_WINDOW_MS", 5_000),
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tshark_reader_join_timeout_seconds=_env_float("BACKEND_TSHARK_READER_JOIN_TIMEOUT_SECONDS", 2.0),
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tshark_process_stop_timeout_seconds=_env_float("BACKEND_TSHARK_PROCESS_STOP_TIMEOUT_SECONDS", 3.0),
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)
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settings = load_settings()
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