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#!/usr/bin/env python3
"""Unit and protocol tests for max25d AX.25 source ban list."""
from __future__ import annotations
import importlib.util
import socket
import subprocess
import sys
import tempfile
import time
from pathlib import Path
from unittest.mock import patch
ROOT = Path(__file__).resolve().parents[2]
LAUNCHER = ROOT / "stacks/daemon/max25d"
DAEMON = ROOT / "stacks/daemon/max25d.py"
sys.path.insert(0, str(DAEMON.parent))
from banlist import BanList, callsign_banned, extract_ax25_source # noqa: E402
def load_max25d_module():
from importlib.machinery import SourceFileLoader
loader = SourceFileLoader("max25d", str(DAEMON))
spec = importlib.util.spec_from_loader("max25d", loader)
mod = importlib.util.module_from_spec(spec)
sys.modules["max25d"] = mod
loader.exec_module(mod)
return mod
class LineReader:
def __init__(self, sock: socket.socket) -> None:
self.sock = sock
self.buf = b""
def read(self, timeout: float = 5.0) -> str:
self.sock.settimeout(timeout)
while b"\n" not in self.buf:
chunk = self.sock.recv(4096)
if not chunk:
raise RuntimeError("connection closed")
self.buf += chunk
line, self.buf = self.buf.split(b"\n", 1)
return line.decode("utf-8")
def free_port() -> int:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(("127.0.0.1", 0))
port = sock.getsockname()[1]
sock.close()
return port
def test_extract_ax25_source() -> None:
assert extract_ax25_source("[AX25 UI DG1ABC>QST] 73") == "DG1ABC"
assert extract_ax25_source("[AX25 UI DK0WC-7>CB-0] hi") == "DK0WC-7"
assert extract_ax25_source("plain text") is None
assert extract_ax25_source("[CRDOP RX soft-crdop] hello") is None
def test_callsign_banned_matching() -> None:
assert callsign_banned("DG1ABC", "DG1ABC")
assert callsign_banned("DG1ABC", "DG1ABC-7")
assert not callsign_banned("DG1ABC", "DG1ABD")
assert callsign_banned("DK0WC-7", "DK0WC-7")
assert not callsign_banned("DK0WC-7", "DK0WC")
assert not callsign_banned("DK0WC-7", "DK0WC-8")
def test_banlist_file_roundtrip() -> None:
with tempfile.TemporaryDirectory() as tmp:
path = Path(tmp) / "bans.txt"
path.write_text("# ignored comment\nDG1ABC\n\nDK0WC-7\n", encoding="utf-8")
bans = BanList(path)
assert bans.list() == ["DG1ABC", "DK0WC-7"]
assert bans.is_banned("DG1ABC-3")
assert bans.is_banned("DK0WC-7")
assert not bans.is_banned("DK0WC")
bans.add("DL1TEST")
bans.remove("DG1ABC")
assert bans.list() == ["DK0WC-7", "DL1TEST"]
reloaded = BanList(path)
assert reloaded.list() == ["DK0WC-7", "DL1TEST"]
def test_on_backend_rx_silent_drop() -> None:
mod = load_max25d_module()
with tempfile.TemporaryDirectory() as tmp:
bans_path = Path(tmp) / "bans.txt"
bans_path.write_text("DG1ABC\n", encoding="utf-8")
cfg = mod.DaemonConfig(bans_file=str(bans_path))
state = mod.DaemonState(cfg=cfg, bans=BanList(bans_path))
mod.init_device_runtimes(state)
sent: list[str] = []
def capture(_state, line, skip=None):
sent.append(line)
with patch.object(mod, "broadcast", side_effect=capture), patch.object(mod, "log"):
mod.on_backend_rx(state, "tnc2c", "[AX25 UI DG1ABC>QST] blocked")
assert sent == []
mod.on_backend_rx(state, "tnc2c", "[AX25 UI DK0WC>QST] allowed")
assert sent == ["RX device=tnc2c [AX25 UI DK0WC>QST] allowed"]
def test_ban_commands_protocol() -> None:
port = free_port()
with tempfile.TemporaryDirectory() as tmp:
bans_path = Path(tmp) / "bans.txt"
ini_path = Path(tmp) / "max25d.ini"
ini_path.write_text(
f"""
[daemon]
device = tnc2c
hardware = tncs
[network]
tcp_host = 127.0.0.1
tcp_port = {port}
[modem]
bans_file = {bans_path}
[stack]
auto_start = no
""",
encoding="utf-8",
)
proc = subprocess.Popen(
[
str(LAUNCHER),
"--no-stack",
"--no-serial",
"-c",
str(ini_path),
"--tcp-port",
str(port),
],
stdout=subprocess.DEVNULL,
stderr=subprocess.PIPE,
text=True,
)
time.sleep(0.6)
try:
sock = socket.create_connection(("127.0.0.1", port), timeout=3)
except OSError as exc:
proc.terminate()
proc.wait(timeout=3)
raise RuntimeError(f"connect failed: {exc}") from exc
reader = LineReader(sock)
try:
assert reader.read() == "OK"
reader.read() # STATUS
sock.sendall(b"BAN DG1ABC\n")
assert reader.read() == "OK"
assert bans_path.read_text(encoding="utf-8").strip() == "DG1ABC"
sock.sendall(b"BANS\n")
assert reader.read() == "BAN DG1ABC"
assert reader.read() == "OK"
sock.sendall(b"UNBAN DG1ABC\n")
assert reader.read() == "OK"
assert bans_path.read_text(encoding="utf-8") == ""
sock.sendall(b"UNBAN DG1ABC\n")
assert reader.read() == "ERR not banned"
sock.sendall(b"BAN BAD!\n")
assert reader.read() == "ERR invalid callsign"
finally:
sock.close()
proc.terminate()
proc.wait(timeout=5)
def main() -> int:
tests = [
test_extract_ax25_source,
test_callsign_banned_matching,
test_banlist_file_roundtrip,
test_on_backend_rx_silent_drop,
test_ban_commands_protocol,
]
for test in tests:
test()
print(f"OK: {test.__name__}")
print("OK: banlist tests")
return 0
if __name__ == "__main__":
sys.exit(main())
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