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ADN-DMR-Peer-Server/tests/hbp/test_hbp_loop_control.py

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# ADN DMR Peer Server - tests hbp hbp loop control
#
# Copyright (C) 2026 Rodrigo Pérez, CE5RPY <ce5rpy@qmd.cl>
#
###############################################################################
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
###############################################################################
"""HBP vs HBP loop control (ingress packet control)."""
from __future__ import annotations
import pytest
from tests.harness.assertions import assert_capture_unchanged, assert_inject_ok
from tests.harness.deterministic import DeterministicScenario, PacketSpec, active_routing_table
def test_hbp_loop_loser_when_other_hbp_owns_stream() -> None:
"""Second HBP source loses when another MASTER slot already has RX_STREAM_ID."""
bridges = active_routing_table(91, (("MASTER-A", 2), ("MASTER-B", 2)))
scenario = DeterministicScenario(routing_table=bridges)
stream_id = 0x41414141
scenario.seed_hbp_slot_stream("MASTER-B", 2, stream_id, tgid=91)
base = PacketSpec(dst_id=91, stream_id=stream_id, slot=2)
scenario.inject_hbp("MASTER-A", DeterministicScenario.voice_head_spec(base))
ok = scenario.inject_hbp(
"MASTER-A",
DeterministicScenario.voice_burst_spec(base, seq=1, dtype_vseq=1),
)
assert_inject_ok(ok, expected=False)
assert scenario.protocols["MASTER-A"].STATUS[2].get("LOOPLOG") is True
@pytest.mark.behavior
def test_hbp_loop_winner_forwards_until_loser_detected() -> None:
"""Regression: VHEAD bridges; loop loser burst does not add forwards."""
bridges = active_routing_table(91, (("MASTER-A", 2), ("MASTER-B", 2)))
scenario = DeterministicScenario(routing_table=bridges)
stream_id = 0x42424242
scenario.seed_hbp_slot_stream("MASTER-B", 2, stream_id, tgid=91)
base = PacketSpec(dst_id=91, stream_id=stream_id, slot=2)
scenario.inject_hbp("MASTER-A", DeterministicScenario.voice_head_spec(base))
forwarded_after_vhead = len(scenario.capture.for_system("MASTER-B"))
ok = scenario.inject_hbp(
"MASTER-A",
DeterministicScenario.voice_burst_spec(base, seq=1, dtype_vseq=1),
)
assert_capture_unchanged(scenario, "MASTER-B", forwarded_after_vhead)
assert_inject_ok(ok, expected=False)

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