pyMC_Repeater/tests/test_packet_router.py

"""
Tests for PacketRouter in-flight cap and shutdown behaviour.
Addresses the three concerns raised in PR 191 review:

  1. Cap enforcement: packets beyond _max_in_flight are dropped, not queued.
  2. Drop counter: _cap_drop_count increments on each cap-drop so operators
     have visibility into how often the safety valve fires.
  3. Shutdown drain: stop() waits for in-flight tasks to finish (up to 5 s),
     then cancels any that remain — tasks are never silently abandoned.

Run with:
    python -m pytest tests/test_packet_router.py -v
or:
    python -m unittest tests.test_packet_router -v
"""

import asyncio
import hashlib
import time
import unittest
from unittest.mock import AsyncMock, MagicMock, patch

from openhop_core.companion import CompanionBridge
from openhop_core.node.handlers.ack import AckHandler
from openhop_core.node.handlers.advert import AdvertHandler
from openhop_core.node.handlers.control import ControlHandler
from openhop_core.node.handlers.group_text import GroupTextHandler
from openhop_core.node.handlers.login_response import LoginResponseHandler
from openhop_core.node.handlers.login_server import LoginServerHandler
from openhop_core.node.handlers.multipart import MultipartAckHandler
from openhop_core.node.handlers.path import PathHandler
from openhop_core.node.handlers.protocol_request import ProtocolRequestHandler
from openhop_core.node.handlers.protocol_response import ProtocolResponseHandler
from openhop_core.node.handlers.result import HandlerResult
from openhop_core.node.handlers.text import TextMessageHandler
from openhop_core.node.handlers.trace import TraceHandler
from openhop_core.protocol.constants import (
    PAYLOAD_TYPE_GRP_DATA,
    ROUTE_TYPE_DIRECT,
    ROUTE_TYPE_FLOOD,
    ROUTE_TYPE_TRANSPORT_DIRECT,
)
from openhop_core.protocol import LocalIdentity, Packet, PacketBuilder

from repeater.packet_router import (
    PacketRouter,
    _companion_dedup_key,
    _is_direct_final_hop,
)
from repeater.policy_engine import PolicyEngine

# ---------------------------------------------------------------------------
# Minimal daemon stub
# ---------------------------------------------------------------------------


def _make_daemon():
    """Minimal daemon that satisfies PacketRouter without touching hardware."""
    daemon = MagicMock()
    daemon.repeater_handler = AsyncMock(return_value=True)
    daemon.repeater_handler.record_packet_only = MagicMock()
    daemon.trace_helper = None
    daemon.discovery_helper = None
    daemon.advert_helper = None
    daemon.companion_bridges = {}
    daemon.login_helper = None
    daemon.text_helper = None
    daemon.path_helper = None
    daemon.protocol_request_helper = None
    daemon.dispatcher = MagicMock()
    daemon.dispatcher._register_ack_received = AsyncMock()
    daemon.dispatcher.wait_for_ack = AsyncMock(return_value=True)
    return daemon


def _make_packet(payload_type: int = 0xFF):
    """Minimal packet stub."""
    pkt = MagicMock()
    pkt.get_payload_type.return_value = payload_type
    pkt.payload = b"\xff"
    pkt.header = 0x00
    pkt.rssi = -80
    pkt.snr = 5.0
    pkt.timestamp = time.time()
    pkt._injected_for_tx = False
    pkt.path = bytearray()
    pkt.calculate_packet_hash.return_value = b"\x01" * 32
    pkt.mark_do_not_retransmit = MagicMock()
    return pkt


def _make_bridge():
    bridge = MagicMock()
    bridge.process_received_packet = AsyncMock()
    return bridge


class _SlottedPacket:
    __slots__ = (
        "payload",
        "header",
        "rssi",
        "snr",
        "timestamp",
        "_injected_for_tx",
        "path",
        "calculate_packet_hash",
        "mark_do_not_retransmit",
        "_payload_type",
    )

    def __init__(self, payload_type: int = 1):
        self.payload = b"\x00"
        self.header = 0x00
        self.rssi = -80
        self.snr = 5.0
        self.timestamp = time.time()
        self._injected_for_tx = False
        self.path = bytearray()
        self.calculate_packet_hash = MagicMock(return_value=b"\x01" * 32)
        self.mark_do_not_retransmit = MagicMock()
        self._payload_type = payload_type

    def get_payload_type(self):
        return self._payload_type

    def get_path_hash_size(self):
        return 0

    def get_path_hash_count(self):
        return 0

    def get_path_hashes_hex(self):
        return []


# ---------------------------------------------------------------------------
# Tests
# ---------------------------------------------------------------------------


class TestInFlightCap(unittest.IsolatedAsyncioTestCase):
    # ── 1. Cap enforcement ──────────────────────────────────────────────────

    async def test_cap_drops_packets_when_full(self):
        """
        When _in_flight reaches _max_in_flight, new packets from the queue
        must be dropped (not passed to _route_packet).
        """
        router = PacketRouter(_make_daemon())
        router._max_in_flight = 3

        # Manually occupy all slots with long-sleeping tasks
        barrier = asyncio.Event()

        async def slow_route(pkt):
            await barrier.wait()  # blocks until we release

        routed = []

        async def counting_route(pkt):
            routed.append(pkt)
            await barrier.wait()

        router._route_packet = counting_route

        await router.start()

        # Fill the cap
        for _ in range(3):
            await router.enqueue(_make_packet())
        await asyncio.sleep(0.05)  # let queue drain into tasks
        self.assertEqual(router._in_flight, 3)

        # These should be dropped
        for _ in range(5):
            await router.enqueue(_make_packet())
        await asyncio.sleep(0.05)

        self.assertEqual(router._in_flight, 3, "In-flight count exceeded cap")
        self.assertEqual(router._cap_drop_count, 5, "Expected 5 cap-drops, got different count")

        barrier.set()  # release blocked tasks
        await router.stop()

    # ── 2. Drop counter ─────────────────────────────────────────────────────

    async def test_cap_drop_count_increments(self):
        """_cap_drop_count must increment by exactly 1 for each dropped packet."""
        router = PacketRouter(_make_daemon())
        router._max_in_flight = 1

        barrier = asyncio.Event()

        async def blocking_route(pkt):
            await barrier.wait()

        router._route_packet = blocking_route

        await router.start()

        # Fill the single slot
        await router.enqueue(_make_packet())
        await asyncio.sleep(0.05)
        self.assertEqual(router._in_flight, 1)

        # Drop three packets
        for _ in range(3):
            await router.enqueue(_make_packet())
        await asyncio.sleep(0.05)

        self.assertEqual(router._cap_drop_count, 3)

        barrier.set()
        await router.stop()

    async def test_cap_drop_count_zero_when_cap_not_reached(self):
        """_cap_drop_count must stay 0 when the cap is never reached."""
        router = PacketRouter(_make_daemon())
        router._max_in_flight = 30

        completed = []

        async def fast_route(pkt):
            completed.append(pkt)

        router._route_packet = fast_route

        await router.start()

        for _ in range(10):
            await router.enqueue(_make_packet())
        await asyncio.sleep(0.1)

        self.assertEqual(router._cap_drop_count, 0)
        await router.stop()

    async def test_injected_trace_packet_skips_inbound_trace_processing(self):
        """Locally injected TRACE packets must not be re-parsed as inbound trace responses."""
        daemon = _make_daemon()
        daemon.trace_helper = MagicMock()
        daemon.trace_helper.process_trace_packet = AsyncMock()

        router = PacketRouter(daemon)
        pkt = _make_packet(payload_type=TraceHandler.payload_type())

        await router.start()
        try:
            injected = await router.inject_packet(pkt)
            self.assertTrue(injected)
            await asyncio.sleep(0.05)

            daemon.repeater_handler.assert_awaited_once()
            daemon.trace_helper.process_trace_packet.assert_not_awaited()
        finally:
            await router.stop()

    async def test_policy_companion_precheck_handles_slotted_packet(self):
        """Policy companion precheck must not attach attributes to slotted Packet objects."""
        daemon = _make_daemon()
        daemon.companion_bridges = {"bridge": _make_bridge()}
        daemon.repeater_handler.policy_engine = PolicyEngine({"enabled": True, "rules": []})
        router = PacketRouter(daemon)
        pkt = _SlottedPacket(payload_type=1)
        metadata = {"rssi": pkt.rssi, "snr": pkt.snr}

        bridges = router._companion_bridges_for_packet(pkt, metadata)

        self.assertEqual(bridges, daemon.companion_bridges)
        self.assertIn("_policy_precheck_decision", metadata)

    async def test_route_grp_txt_reuses_policy_precheck_metadata(self):
        """GRP_TXT should not force a second policy evaluation when the router already pre-checked it."""
        daemon = _make_daemon()
        daemon.repeater_handler = AsyncMock(return_value=True)
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        daemon.repeater_handler.policy_engine = PolicyEngine({"enabled": True, "rules": []})
        evaluate_spy = patch.object(
            daemon.repeater_handler.policy_engine,
            "evaluate",
            wraps=daemon.repeater_handler.policy_engine.evaluate,
        )
        bridge = _make_bridge()
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(GroupTextHandler.payload_type())

        with evaluate_spy as mock_evaluate:
            await router._route_packet(pkt)

        self.assertEqual(mock_evaluate.call_count, 1)
        bridge.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_grp_data_fans_out_to_companions_and_forwards(self):
        """GRP_DATA reaches each companion for channel matching, then reaches the engine."""
        daemon = _make_daemon()
        first_bridge = _make_bridge()
        second_bridge = _make_bridge()
        daemon.companion_bridges = {0x01: first_bridge, 0x02: second_bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(PAYLOAD_TYPE_GRP_DATA)
        # Firmware wire vector: GRP_DATA (0x06), version 0, FLOOD (0x01).
        pkt.header = (PAYLOAD_TYPE_GRP_DATA << 2) | ROUTE_TYPE_FLOOD
        self.assertEqual(pkt.header, 0x19)

        await router._route_packet(pkt)

        first_bridge.process_received_packet.assert_awaited_once_with(pkt)
        second_bridge.process_received_packet.assert_awaited_once_with(pkt)
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_grp_data_decrypts_in_a_companion_and_forwards(self):
        """A firmware-format GRP_DATA packet is both delivered locally and forwarded."""
        channel_secret = b"\x11" * 32

        async def inject_packet(packet, wait_for_ack=False):
            return True

        bridge = CompanionBridge(LocalIdentity(), inject_packet, node_name="Test")
        assert bridge.set_channel(0, "Public", channel_secret)
        packet = PacketBuilder.create_group_data_packet(
            PAYLOAD_TYPE_GRP_DATA,
            channel_hash=hashlib.sha256(channel_secret).digest()[0],
            channel_secret=channel_secret,
            plaintext=b"\x34\x12\x02\xaa\xbb",
            secret=channel_secret,
        )
        self.assertEqual(packet.header, 0x19)

        daemon = _make_daemon()
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)

        await router._route_packet(packet)

        queued = bridge.sync_next_message()
        self.assertIsNotNone(queued)
        self.assertTrue(queued.is_channel)
        self.assertEqual(queued.channel_idx, 0)
        self.assertEqual(queued.channel_data_type, 0x1234)
        self.assertEqual(queued.channel_data_payload, b"\xaa\xbb")
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_direct_grp_data_intermediate_skips_companion_delivery(self):
        """A direct GRP_DATA packet with a remaining hop is only offered to the engine."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        packet = _make_packet(PAYLOAD_TYPE_GRP_DATA)
        packet.header = (PAYLOAD_TYPE_GRP_DATA << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])

        await router._route_packet(packet)

        bridge.process_received_packet.assert_not_awaited()
        daemon.repeater_handler.assert_awaited_once()

    async def test_non_injected_handler_false_is_logged(self):
        """Inbound packets should log when repeater_handler reports TX failure."""
        daemon = _make_daemon()
        daemon.repeater_handler = AsyncMock(return_value=False)
        router = PacketRouter(daemon)
        pkt = _make_packet(payload_type=0xFF)

        with patch("repeater.packet_router.logger.warning") as mock_warn:
            await router._route_packet(pkt)

        daemon.repeater_handler.assert_awaited_once()
        mock_warn.assert_called()

    async def test_expected_drop_reason_is_debug_not_warning(self):
        """Policy drops should log as debug to avoid false-alarm warnings."""
        daemon = _make_daemon()

        async def _handler(packet, metadata):
            metadata["_repeater_drop_reason"] = "Max flood hops limit reached"
            return False

        daemon.repeater_handler = AsyncMock(side_effect=_handler)
        router = PacketRouter(daemon)
        pkt = _make_packet(payload_type=0x04)
        pkt.header = 0x11  # type=4, route=FLOOD

        with (
            patch("repeater.packet_router.logger.debug") as mock_debug,
            patch("repeater.packet_router.logger.warning") as mock_warn,
        ):
            await router._route_packet(pkt)

        daemon.repeater_handler.assert_awaited_once()
        mock_debug.assert_called()
        mock_warn.assert_not_called()

    # ── 3. Shutdown: in-flight tasks drained ────────────────────────────────

    async def test_stop_waits_for_in_flight_tasks(self):
        """
        stop() must wait for in-flight tasks to complete before returning.
        Tasks that finish within the 5-second timeout must complete normally,
        not be cancelled.
        """
        router = PacketRouter(_make_daemon())

        completed = []
        started = asyncio.Event()

        async def slow_route(pkt):
            started.set()
            await asyncio.sleep(0.2)  # finishes well within 5 s timeout
            completed.append(pkt)

        router._route_packet = slow_route

        await router.start()
        pkt = _make_packet()
        await router.enqueue(pkt)

        # Wait until the task has actually started
        await asyncio.wait_for(started.wait(), timeout=1.0)

        await router.stop()

        # Task should have completed, not been cancelled
        self.assertEqual(len(completed), 1, "In-flight task was cancelled instead of drained")

    async def test_stop_cancels_tasks_that_exceed_timeout(self):
        """
        Tasks that don't finish within the 5-second timeout must be cancelled,
        not left running indefinitely.
        """
        router = PacketRouter(_make_daemon())
        router._max_in_flight = 5

        cancelled = []
        started = asyncio.Event()

        async def hanging_route(pkt):
            started.set()
            try:
                await asyncio.sleep(999)  # will not finish within 5 s
            except asyncio.CancelledError:
                cancelled.append(pkt)
                raise

        router._route_packet = hanging_route

        async def fast_stop():
            router.running = False
            if router.router_task:
                router.router_task.cancel()
                try:
                    await router.router_task
                except asyncio.CancelledError:
                    pass
            if router._route_tasks:
                snapshot = set(router._route_tasks)
                _, still_pending = await asyncio.wait(snapshot, timeout=0.1)
                for task in still_pending:
                    task.cancel()
                await asyncio.gather(*still_pending, return_exceptions=True)

        router.stop = fast_stop

        await router.start()
        await router.enqueue(_make_packet())
        await asyncio.wait_for(started.wait(), timeout=1.0)

        await router.stop()

        self.assertEqual(len(cancelled), 1, "Hanging task was not cancelled on shutdown")

    # ── 4. Route-tasks set stays in sync with counter ───────────────────────

    async def test_route_tasks_set_cleaned_up_on_completion(self):
        """
        _route_tasks must be empty after all tasks complete — the done-callback
        must discard each task so the set doesn't grow unboundedly.
        """
        router = PacketRouter(_make_daemon())

        async def fast_route(pkt):
            await asyncio.sleep(0)  # yield, then done

        router._route_packet = fast_route

        await router.start()

        for _ in range(10):
            await router.enqueue(_make_packet())

        # Give tasks time to complete
        await asyncio.sleep(0.1)

        self.assertEqual(
            len(router._route_tasks), 0, "_route_tasks not cleaned up after task completion"
        )
        self.assertEqual(router._in_flight, 0, "_in_flight counter not back to 0 after completion")

        await router.stop()

    # ── 5. Counter and set always agree ─────────────────────────────────────

    async def test_counter_matches_set_size_under_load(self):
        """
        _in_flight must always equal len(_route_tasks) while tasks are running.
        Checked at steady state when the cap is saturated.
        """
        router = PacketRouter(_make_daemon())
        router._max_in_flight = 5

        barrier = asyncio.Event()

        async def blocking_route(pkt):
            await barrier.wait()

        router._route_packet = blocking_route

        await router.start()

        for _ in range(5):
            await router.enqueue(_make_packet())
        await asyncio.sleep(0.05)

        self.assertEqual(
            router._in_flight,
            len(router._route_tasks),
            f"Counter ({router._in_flight}) != set size ({len(router._route_tasks)})",
        )

        barrier.set()
        await router.stop()


if __name__ == "__main__":
    unittest.main()


class TestPacketRouterRoutingBranches(unittest.IsolatedAsyncioTestCase):
    def test_companion_dedup_key_handles_hash_exceptions(self):
        pkt = MagicMock()
        pkt.calculate_packet_hash.side_effect = RuntimeError("bad packet")
        self.assertIsNone(_companion_dedup_key(pkt))

    def test_is_direct_final_hop_helper(self):
        pkt = _make_packet()
        pkt.header = ROUTE_TYPE_DIRECT
        pkt.path = bytearray()
        self.assertTrue(_is_direct_final_hop(pkt))
        pkt.path = bytearray(b"\x01")
        self.assertFalse(_is_direct_final_hop(pkt))

    async def test_should_deliver_path_to_companions_dedupes(self):
        router = PacketRouter(_make_daemon())
        pkt = _make_packet(PathHandler.payload_type())
        self.assertTrue(router._should_deliver_path_to_companions(pkt))
        self.assertFalse(router._should_deliver_path_to_companions(pkt))
        key = _companion_dedup_key(pkt)
        router._companion_delivered[key] = time.time() - 1.0
        # Expired entries are only pruned once the dict grows beyond 200 entries.
        for i in range(205):
            router._companion_delivered[f"K{i}"] = time.time() + 60.0
        self.assertTrue(router._should_deliver_path_to_companions(pkt))

    async def test_enqueue_drops_oldest_when_queue_full(self):
        router = PacketRouter(_make_daemon())
        router.queue = asyncio.Queue(maxsize=1)
        p1 = _make_packet()
        p2 = _make_packet()
        await router.queue.put(p1)
        await router.enqueue(p2)
        got = await router.queue.get()
        self.assertIs(got, p2)

    async def test_inject_packet_returns_false_on_engine_error(self):
        daemon = _make_daemon()
        daemon.repeater_handler = AsyncMock(side_effect=RuntimeError("boom"))
        router = PacketRouter(daemon)
        ok = await router.inject_packet(_make_packet())
        self.assertFalse(ok)

    async def test_on_route_done_handles_task_exception(self):
        router = PacketRouter(_make_daemon())

        async def _fails():
            raise RuntimeError("route fail")

        task = asyncio.create_task(_fails())
        with self.assertRaises(RuntimeError):
            await task
        router._in_flight = 1
        router._route_tasks.add(task)
        router._on_route_done(task)
        self.assertEqual(router._in_flight, 0)
        self.assertEqual(len(router._route_tasks), 0)

    async def test_route_trace_inbound_uses_trace_helper_and_skips_engine(self):
        daemon = _make_daemon()
        daemon.trace_helper = MagicMock()
        daemon.trace_helper.process_trace_packet = AsyncMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(TraceHandler.payload_type())
        await router._route_packet(pkt)
        daemon.trace_helper.process_trace_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_control_calls_discovery_and_delivery_and_engine(self):
        daemon = _make_daemon()
        daemon.discovery_helper = MagicMock()
        daemon.discovery_helper.control_handler = AsyncMock()
        daemon.deliver_control_data = AsyncMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(ControlHandler.payload_type())
        pkt.path_len = 0
        await router._route_packet(pkt)
        daemon.discovery_helper.control_handler.assert_awaited_once()
        pkt.mark_do_not_retransmit.assert_called_once()
        daemon.deliver_control_data.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_control_marks_do_not_retransmit_when_discovery_disabled(self):
        """With discovery disabled (discovery_helper is None), control packets must
        still be marked do-not-retransmit so the engine does not relay them. MeshCore
        never forwards control packets regardless of whether discovery is enabled."""
        daemon = _make_daemon()
        daemon.discovery_helper = None
        daemon.deliver_control_data = AsyncMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(ControlHandler.payload_type())
        pkt.path_len = 0
        await router._route_packet(pkt)
        pkt.mark_do_not_retransmit.assert_called_once()

    async def test_route_advert_delivers_to_helpers_and_engine(self):
        daemon = _make_daemon()
        daemon.advert_helper = MagicMock()
        daemon.advert_helper.process_advert_packet = AsyncMock()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x42: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(AdvertHandler.payload_type())
        await router._route_packet(pkt)
        daemon.advert_helper.process_advert_packet.assert_awaited_once()
        bridge.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_advert_policy_drop_blocks_companion_delivery(self):
        daemon = _make_daemon()
        daemon.advert_helper = MagicMock()
        daemon.advert_helper.process_advert_packet = AsyncMock()
        daemon.repeater_handler.policy_engine = PolicyEngine(
            {
                "enabled": True,
                "default_action": "drop",
                "rules": [],
            }
        )
        bridge = _make_bridge()
        daemon.companion_bridges = {0x42: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(AdvertHandler.payload_type())

        await router._route_packet(pkt)

        daemon.advert_helper.process_advert_packet.assert_awaited_once()
        bridge.process_received_packet.assert_not_awaited()

    async def test_route_login_server_to_companion_marks_processed(self):
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x7A: bridge}
        daemon.repeater_handler = AsyncMock()
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginServerHandler.payload_type())
        pkt.payload = bytes([0x7A, 0x99])
        await router._route_packet(pkt)
        bridge.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_login_server_hash_collision_offers_to_both(self):
        """A one-byte dest hash shared by a companion and a room-server identity
        must be offered to BOTH handlers; only the one whose key decrypts replies.
        Regression: previously the companion shadowed the room server, so the
        room-server login never ran and failed with Invalid HMAC."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0xF5: bridge}
        daemon.login_helper = MagicMock()
        daemon.login_helper.handlers = {0xF5: MagicMock()}
        daemon.login_helper.process_login_packet = AsyncMock(return_value=True)
        daemon.repeater_handler = AsyncMock()
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginServerHandler.payload_type())
        pkt.payload = bytes([0xF5, 0x99])
        await router._route_packet(pkt)
        bridge.process_received_packet.assert_awaited_once()
        daemon.login_helper.process_login_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_login_server_companion_only_skips_login_helper(self):
        """No collision: a companion-owned hash with no room server registered
        there must not also invoke login_helper."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x7A: bridge}
        daemon.login_helper = MagicMock()
        daemon.login_helper.handlers = {}  # no room-server identity at this hash
        daemon.login_helper.process_login_packet = AsyncMock(return_value=False)
        daemon.repeater_handler = AsyncMock()
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginServerHandler.payload_type())
        pkt.payload = bytes([0x7A, 0x99])
        await router._route_packet(pkt)
        bridge.process_received_packet.assert_awaited_once()
        daemon.login_helper.process_login_packet.assert_not_awaited()

    async def test_route_login_server_room_server_without_companion(self):
        """No local companion claims the hash: login_helper handles the
        room-server (or forwards a remote) login as before."""
        daemon = _make_daemon()
        daemon.companion_bridges = {}
        daemon.login_helper = MagicMock()
        daemon.login_helper.handlers = {0xF5: MagicMock()}
        daemon.login_helper.process_login_packet = AsyncMock(return_value=True)
        daemon.repeater_handler = AsyncMock()
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginServerHandler.payload_type())
        pkt.payload = bytes([0xF5, 0x99])
        await router._route_packet(pkt)
        daemon.login_helper.process_login_packet.assert_awaited_once()

    async def test_route_text_to_helper_marks_processed(self):
        daemon = _make_daemon()
        daemon.text_helper = MagicMock()
        daemon.text_helper.process_text_packet = AsyncMock(return_value=True)
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        pkt.payload = bytes([0xEE, 0x01])
        await router._route_packet(pkt)
        daemon.text_helper.process_text_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_text_hash_collision_offers_to_both(self):
        """A dest hash shared by a companion and a room-server text identity must
        reach both handlers so a companion never shadows a room-server message."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0xF5: bridge}
        daemon.text_helper = MagicMock()
        daemon.text_helper.handlers = {0xF5: MagicMock()}
        daemon.text_helper.process_text_packet = AsyncMock(return_value=True)
        daemon.repeater_handler = AsyncMock()
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        pkt.payload = bytes([0xF5, 0x01])
        await router._route_packet(pkt)
        bridge.process_received_packet.assert_awaited_once()
        daemon.text_helper.process_text_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_text_companion_only_skips_text_helper(self):
        """No collision: a companion-owned text hash must not also hit text_helper."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0xEE: bridge}
        daemon.text_helper = MagicMock()
        daemon.text_helper.handlers = {}  # no room-server text identity here
        daemon.text_helper.process_text_packet = AsyncMock(return_value=False)
        daemon.repeater_handler = AsyncMock()
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        pkt.payload = bytes([0xEE, 0x01])
        await router._route_packet(pkt)
        bridge.process_received_packet.assert_awaited_once()
        daemon.text_helper.process_text_packet.assert_not_awaited()

    async def test_route_ack_delivers_to_all_bridges_and_engine(self):
        daemon = _make_daemon()
        b1 = _make_bridge()
        b2 = _make_bridge()
        daemon.companion_bridges = {0x01: b1, 0x02: b2}
        router = PacketRouter(daemon)
        pkt = _make_packet(AckHandler.payload_type())
        await router._route_packet(pkt)
        b1.process_received_packet.assert_awaited_once()
        b2.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_ack_registers_crc_with_dispatcher(self):
        """Discrete ACKs must feed dispatcher ACK matching or wait_for_ack never resolves."""
        daemon = _make_daemon()
        router = PacketRouter(daemon)
        pkt = _make_packet(AckHandler.payload_type())
        # 6-byte firmware ACK: 4-byte CRC (LE) + ext-attempt + random byte
        pkt.payload = bytes.fromhex("4dabaf95") + b"\x00\x7f"
        await router._route_packet(pkt)
        daemon.dispatcher._register_ack_received.assert_awaited_once_with(0x95AFAB4D)

    async def test_route_ack_short_payload_not_registered(self):
        daemon = _make_daemon()
        router = PacketRouter(daemon)
        pkt = _make_packet(AckHandler.payload_type())
        pkt.payload = b"\x01\x02"
        await router._route_packet(pkt)
        daemon.dispatcher._register_ack_received.assert_not_awaited()

    async def test_route_locally_injected_ack_registers_crc(self):
        """ACKs from same-instance companions never cross the radio: the injected
        packet re-entering the router is the only chance to resolve local waiters
        (e.g. a room server pushing to a virtual companion on this repeater)."""
        daemon = _make_daemon()
        router = PacketRouter(daemon)
        pkt = _make_packet(AckHandler.payload_type())
        pkt.payload = b"\xaa\xbb\xcc\xdd"
        pkt._injected_for_tx = True
        await router._route_packet(pkt)
        daemon.dispatcher._register_ack_received.assert_awaited_once_with(0xDDCCBBAA)
        daemon.repeater_handler.assert_not_awaited()  # already transmitted

    async def test_inject_packet_waits_on_expected_ack_crc(self):
        """Callers that know the crypto ACK CRC pass it; packet.get_crc() is a
        packet-hash CRC no ACK sender ever produces."""
        daemon = _make_daemon()
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        ok = await router.inject_packet(
            pkt, wait_for_ack=True, expected_crc=0x1234ABCD, ack_timeout_s=12.0
        )
        self.assertTrue(ok)
        daemon.dispatcher.wait_for_ack.assert_awaited_once_with(0x1234ABCD, timeout=12.0)
        pkt.get_crc.assert_not_called()

    async def test_route_path_to_local_identity_runs_path_helper_despite_bridges(self):
        """PATH addressed to a room server/repeater identity must reach the path
        helper (out_path update + embedded ACK) even when companion bridges exist;
        previously the all-bridges branch swallowed it."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x01: bridge}
        daemon.path_helper = MagicMock()
        daemon.path_helper.acl_dict = {0x48: MagicMock()}
        daemon.path_helper.process_path_packet = AsyncMock(return_value=False)
        router = PacketRouter(daemon)
        pkt = _make_packet(PathHandler.payload_type())
        pkt.payload = bytes([0x48, 0x77, 0xAA, 0xBB])
        await router._route_packet(pkt)
        daemon.path_helper.process_path_packet.assert_awaited_once_with(pkt)

    async def test_authenticated_flood_path_skips_engine(self):
        daemon = _make_daemon()
        daemon.path_helper = MagicMock()
        daemon.path_helper.process_path_packet = AsyncMock(return_value=True)
        bridge = _make_bridge()
        bridge.process_received_packet = AsyncMock(return_value=HandlerResult.consumed())
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(PathHandler.payload_type())
        pkt.payload = bytes([0x01, 0x22])

        await router._route_packet(pkt)

        bridge.process_received_packet.assert_awaited_once_with(pkt)
        daemon.repeater_handler.assert_not_awaited()

    async def test_unauthenticated_flood_path_reaches_engine(self):
        daemon = _make_daemon()
        daemon.path_helper = MagicMock()
        daemon.path_helper.process_path_packet = AsyncMock(return_value=False)
        bridge = _make_bridge()
        bridge.process_received_packet = AsyncMock(return_value=HandlerResult.not_for_us())
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(PathHandler.payload_type())
        pkt.payload = bytes([0x01, 0x22])

        await router._route_packet(pkt)

        daemon.repeater_handler.assert_awaited_once()

    async def test_route_path_dedupes_companion_delivery(self):
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(PathHandler.payload_type())
        pkt.payload = bytes([0x01, 0xAA])
        await router._route_packet(pkt)
        await router._route_packet(pkt)
        bridge.process_received_packet.assert_awaited_once()
        self.assertEqual(daemon.repeater_handler.await_count, 2)

    async def test_route_login_response_final_hop_skips_engine(self):
        daemon = _make_daemon()
        b1 = _make_bridge()
        daemon.companion_bridges = {0x01: b1}
        daemon.local_hash = 0xFF
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginResponseHandler.payload_type())
        pkt.header = ROUTE_TYPE_DIRECT
        pkt.path = bytearray()
        pkt.payload = bytes([0xFF, 0x22])
        await router._route_packet(pkt)
        b1.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_authenticated_flood_response_skips_engine(self):
        daemon = _make_daemon()
        bridge = _make_bridge()
        bridge.process_received_packet = AsyncMock(return_value=HandlerResult.consumed())
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginResponseHandler.payload_type())
        pkt.payload = bytes([0x01, 0x22])

        await router._route_packet(pkt)

        bridge.process_received_packet.assert_awaited_once_with(pkt)
        daemon.repeater_handler.assert_not_awaited()

    async def test_unauthenticated_flood_response_reaches_engine(self):
        daemon = _make_daemon()
        bridge = _make_bridge()
        bridge.process_received_packet = AsyncMock(return_value=HandlerResult.not_for_us())
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        pkt = _make_packet(LoginResponseHandler.payload_type())
        pkt.payload = bytes([0x01, 0x22])

        await router._route_packet(pkt)

        daemon.repeater_handler.assert_awaited_once()

    async def test_route_protocol_response_final_hop_skips_engine(self):
        daemon = _make_daemon()
        b1 = _make_bridge()
        daemon.companion_bridges = {0x01: b1}
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(ProtocolResponseHandler.payload_type())
        pkt.header = ROUTE_TYPE_DIRECT
        pkt.path = bytearray()
        # PathHandler and ProtocolResponseHandler currently share payload type=8.
        # Patch PathHandler type here so ProtocolResponse branch is reachable.
        with patch("repeater.packet_router.PathHandler.payload_type", return_value=0x55):
            await router._route_packet(pkt)
        self.assertGreaterEqual(b1.process_received_packet.await_count, 1)
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_protocol_request_final_hop_skips_engine(self):
        daemon = _make_daemon()
        b1 = _make_bridge()
        daemon.companion_bridges = {0x01: b1}
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(ProtocolRequestHandler.payload_type())
        pkt.header = ROUTE_TYPE_DIRECT
        pkt.path = bytearray()
        pkt.payload = bytes([0xAA, 0xBB])
        await router._route_packet(pkt)
        b1.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_protocol_request_companion_collision_forwards(self):
        """A REQ whose dest prefix matches a companion but does not decrypt for
        it must be forwarded, not swallowed."""
        daemon = _make_daemon()
        b1 = _make_bridge()
        # Collision: the packet is not really for this companion.
        b1.process_received_packet = AsyncMock(return_value=HandlerResult.not_for_us())
        daemon.companion_bridges = {0x01: b1}
        router = PacketRouter(daemon)
        pkt = _make_packet(ProtocolRequestHandler.payload_type())
        pkt.header = 0x00  # transport-flood: not a direct final hop
        pkt.path = bytearray([0xAA])
        pkt.payload = bytes([0x01, 0xBB])
        await router._route_packet(pkt)
        b1.process_received_packet.assert_awaited_once()
        # Not consumed -> handed to the forwarding engine.
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_text_companion_collision_forwards(self):
        """A TXT_MSG whose dest prefix matches a companion but does not decrypt
        for it must be forwarded, not swallowed."""
        daemon = _make_daemon()
        b1 = _make_bridge()
        b1.process_received_packet = AsyncMock(return_value=HandlerResult.not_for_us())
        daemon.companion_bridges = {0x01: b1}
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        pkt.header = 0x00
        pkt.path = bytearray([0xAA])
        pkt.payload = bytes([0x01, 0xBB])
        await router._route_packet(pkt)
        b1.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_text_tries_all_candidates_room_server_wins(self):
        """A companion and a room-server text identity share a hash. The router
        must try both; when the companion fails to decrypt but the room server
        authenticates, the packet is consumed (not forwarded)."""
        daemon = _make_daemon()
        companion = _make_bridge()
        companion.process_received_packet = AsyncMock(return_value=HandlerResult.not_for_us())
        daemon.companion_bridges = {0x42: companion}
        daemon.text_helper = MagicMock()
        daemon.text_helper.handlers = {0x42: {"name": "room-a"}}
        daemon.text_helper.process_text_packet = AsyncMock(return_value=True)
        daemon.repeater_handler.storage = MagicMock()
        daemon.repeater_handler.record_packet_only = MagicMock()
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        pkt.header = 0x00
        pkt.path = bytearray([0xAA])
        pkt.payload = bytes([0x42, 0xBB])
        await router._route_packet(pkt)
        # Both local candidates were tried; the room server consumed it.
        companion.process_received_packet.assert_awaited_once()
        daemon.text_helper.process_text_packet.assert_awaited_once()
        daemon.repeater_handler.assert_not_awaited()

    async def test_route_text_all_local_candidates_fail_forwards(self):
        """When neither the companion nor the room-server identity at the hash
        authenticates, the packet is left for the forwarding engine."""
        daemon = _make_daemon()
        companion = _make_bridge()
        companion.process_received_packet = AsyncMock(return_value=HandlerResult.not_for_us())
        daemon.companion_bridges = {0x42: companion}
        daemon.text_helper = MagicMock()
        daemon.text_helper.handlers = {0x42: {"name": "room-a"}}
        daemon.text_helper.process_text_packet = AsyncMock(return_value=False)
        router = PacketRouter(daemon)
        pkt = _make_packet(TextMessageHandler.payload_type())
        pkt.header = 0x00
        pkt.path = bytearray([0xAA])
        pkt.payload = bytes([0x42, 0xBB])
        await router._route_packet(pkt)
        companion.process_received_packet.assert_awaited_once()
        daemon.text_helper.process_text_packet.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_route_group_text_delivers_and_forwards(self):
        daemon = _make_daemon()
        b1 = _make_bridge()
        daemon.companion_bridges = {0x01: b1}
        router = PacketRouter(daemon)
        pkt = _make_packet(GroupTextHandler.payload_type())
        await router._route_packet(pkt)
        b1.process_received_packet.assert_awaited_once()
        daemon.repeater_handler.assert_awaited_once()

    async def test_direct_intermediate_bypasses_all_local_payload_handlers(self):
        """Direct intermediate hops must reach the engine before local payload handling."""
        payload_types = (
            AdvertHandler.payload_type(),
            LoginServerHandler.payload_type(),
            TextMessageHandler.payload_type(),
            PathHandler.payload_type(),
            LoginResponseHandler.payload_type(),
            ProtocolRequestHandler.payload_type(),
            GroupTextHandler.payload_type(),
            PAYLOAD_TYPE_GRP_DATA,
        )
        for route_type in (ROUTE_TYPE_DIRECT, ROUTE_TYPE_TRANSPORT_DIRECT):
            for payload_type in payload_types:
                with self.subTest(route_type=route_type, payload_type=payload_type):
                    daemon = _make_daemon()
                    bridge = _make_bridge()
                    daemon.companion_bridges = {0x01: bridge}
                    daemon.advert_helper = MagicMock(process_advert_packet=AsyncMock())
                    daemon.login_helper = MagicMock(
                        handlers={0x01: object()}, process_login_packet=AsyncMock(return_value=True)
                    )
                    daemon.text_helper = MagicMock(
                        handlers={0x01: object()}, process_text_packet=AsyncMock(return_value=True)
                    )
                    daemon.path_helper = MagicMock(process_path_packet=AsyncMock(return_value=True))
                    daemon.protocol_request_helper = MagicMock(
                        handlers={0x01: object()},
                        process_request_packet=AsyncMock(return_value=True),
                    )
                    router = PacketRouter(daemon)
                    packet = _make_packet(payload_type)
                    packet.header = (payload_type << 2) | route_type
                    packet.path = bytearray([0x42])
                    packet.payload = bytes([0x01, 0x02, 0x03, 0x04])

                    await router._route_packet(packet)

                    bridge.process_received_packet.assert_not_awaited()
                    daemon.advert_helper.process_advert_packet.assert_not_awaited()
                    daemon.login_helper.process_login_packet.assert_not_awaited()
                    daemon.text_helper.process_text_packet.assert_not_awaited()
                    daemon.path_helper.process_path_packet.assert_not_awaited()
                    daemon.protocol_request_helper.process_request_packet.assert_not_awaited()
                    daemon.repeater_handler.assert_awaited_once_with(packet, unittest.mock.ANY)

    async def test_direct_intermediate_firmware_vectors_bypass_local_text_candidates(self):
        """Decoded direct and transport-direct wire vectors skip local text handling."""
        # header | [transport codes] | path_len | remaining path | payload
        vectors = (
            b"\x0a\x01\x42\x01\x02\x03\x04",
            b"\x0b\x34\x12\x78\x56\x01\x42\x01\x02\x03\x04",
        )
        for wire in vectors:
            with self.subTest(wire=wire.hex()):
                daemon = _make_daemon()
                bridge = _make_bridge()
                daemon.companion_bridges = {0x01: bridge}
                daemon.text_helper = MagicMock(
                    handlers={0x01: object()}, process_text_packet=AsyncMock(return_value=True)
                )
                router = PacketRouter(daemon)
                packet = Packet()
                packet.read_from(wire)

                await router._route_packet(packet)

                bridge.process_received_packet.assert_not_awaited()
                daemon.text_helper.process_text_packet.assert_not_awaited()
                daemon.repeater_handler.assert_awaited_once_with(packet, unittest.mock.ANY)

    async def test_final_direct_firmware_vectors_deliver_to_local_companion(self):
        """Decoded zero-hop direct vectors reach their local companion rather than forwarding."""
        # header | [transport codes] | path_len=0 | dest hash | source hash | payload
        vectors = (
            b"\x0a\x00\x01\x02\x03\x04",
            b"\x0b\x34\x12\x78\x56\x00\x01\x02\x03\x04",
        )
        for wire in vectors:
            with self.subTest(wire=wire.hex()):
                daemon = _make_daemon()
                bridge = _make_bridge()
                bridge.process_received_packet = AsyncMock(return_value=HandlerResult.consumed())
                daemon.companion_bridges = {0x01: bridge}
                router = PacketRouter(daemon)
                packet = Packet()
                packet.read_from(wire)

                await router._route_packet(packet)

                bridge.process_received_packet.assert_awaited_once_with(packet)
                daemon.repeater_handler.assert_not_awaited()

    async def test_direct_intermediate_ack_notifies_waiter_without_companion_delivery(self):
        """MeshCore's early ACK notification does not make an intermediate hop a recipient."""
        daemon = _make_daemon()
        bridge = _make_bridge()
        daemon.companion_bridges = {0x01: bridge}
        router = PacketRouter(daemon)
        packet = _make_packet(AckHandler.payload_type())
        packet.header = (AckHandler.payload_type() << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])
        packet.payload = bytes.fromhex("4dabaf95") + b"\x00\x7f"

        await router._route_packet(packet)

        daemon.dispatcher._register_ack_received.assert_awaited_once_with(0x95AFAB4D)
        bridge.process_received_packet.assert_not_awaited()
        daemon.repeater_handler.assert_awaited_once()

    async def test_direct_intermediate_control_high_bit_is_released_without_local_delivery(self):
        """A high-bit CONTROL packet with remaining direct hops is not locally processed."""
        daemon = _make_daemon()
        daemon.discovery_helper = MagicMock(control_handler=AsyncMock())
        daemon.deliver_control_data = AsyncMock()
        router = PacketRouter(daemon)
        packet = _make_packet(ControlHandler.payload_type())
        packet.header = (ControlHandler.payload_type() << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])
        packet.payload = b"\x90\x00\x01\x00\x00\x00"

        await router._route_packet(packet)

        daemon.discovery_helper.control_handler.assert_not_awaited()
        daemon.deliver_control_data.assert_not_awaited()
        packet.mark_do_not_retransmit.assert_not_called()
        daemon.repeater_handler.assert_not_awaited()

    async def test_direct_intermediate_control_without_high_bit_reaches_engine(self):
        """Only high-bit CONTROL is zero-hop-only; other direct control remains routing traffic."""
        daemon = _make_daemon()
        daemon.discovery_helper = MagicMock(control_handler=AsyncMock())
        daemon.deliver_control_data = AsyncMock()
        router = PacketRouter(daemon)
        packet = _make_packet(ControlHandler.payload_type())
        packet.header = (ControlHandler.payload_type() << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])
        packet.payload = b"\x01\x00"

        await router._route_packet(packet)

        daemon.discovery_helper.control_handler.assert_not_awaited()
        daemon.deliver_control_data.assert_not_awaited()
        packet.mark_do_not_retransmit.assert_not_called()
        daemon.repeater_handler.assert_awaited_once()

    async def test_direct_intermediate_multipart_ack_does_not_notify_local_waiter(self):
        """A direct intermediate MULTIPART ACK remains forwarding traffic, not a local ACK."""
        daemon = _make_daemon()
        router = PacketRouter(daemon)
        packet = _make_packet(MultipartAckHandler.payload_type())
        packet.header = (MultipartAckHandler.payload_type() << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])
        packet.payload = b"\x03" + bytes.fromhex("4dabaf95")

        await router._route_packet(packet)

        daemon.dispatcher._register_ack_received.assert_not_awaited()
        daemon.repeater_handler.assert_awaited_once()

    async def test_direct_intermediate_trace_uses_trace_handler(self):
        """TRACE keeps its MeshCore-specific forwarding path ahead of generic direct routing."""
        daemon = _make_daemon()
        daemon.trace_helper = MagicMock(process_trace_packet=AsyncMock())
        router = PacketRouter(daemon)
        packet = _make_packet(TraceHandler.payload_type())
        packet.header = (TraceHandler.payload_type() << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])

        await router._route_packet(packet)

        daemon.trace_helper.process_trace_packet.assert_awaited_once_with(packet)
        daemon.repeater_handler.assert_not_awaited()

    async def test_direct_intermediate_trace_without_helper_is_released(self):
        """TRACE remains MeshCore-owned even if a helper is unavailable during startup."""
        daemon = _make_daemon()
        daemon.trace_helper = None
        router = PacketRouter(daemon)
        packet = _make_packet(TraceHandler.payload_type())
        packet.header = (TraceHandler.payload_type() << 2) | ROUTE_TYPE_DIRECT
        packet.path = bytearray([0x42])

        await router._route_packet(packet)

        daemon.repeater_handler.assert_not_awaited()


class TestInjectedTxRawEcho(unittest.IsolatedAsyncioTestCase):
    """inject_packet echoes local TX to companion clients as raw RX (0x88)."""

    async def test_inject_packet_echoes_raw_tx_to_companions(self):
        """Successful local TX is pushed via _on_raw_rx_for_companions with snr=0/rssi=0."""
        daemon = _make_daemon()
        daemon._on_raw_rx_for_companions = AsyncMock()
        router = PacketRouter(daemon)
        pkt = _make_packet()
        pkt.write_to.return_value = b"\x10\x20\x30"

        ok = await router.inject_packet(pkt)

        self.assertTrue(ok)
        daemon._on_raw_rx_for_companions.assert_awaited_once_with(
            b"\x10\x20\x30", 0, 0.0, exclude_hash=None
        )

    async def test_inject_packet_excludes_originating_companion(self):
        """A companion's own TX is echoed with its hash excluded (no self-echo)."""
        daemon = _make_daemon()
        daemon._on_raw_rx_for_companions = AsyncMock()
        router = PacketRouter(daemon)
        pkt = _make_packet()
        pkt.write_to.return_value = b"\xaa\xbb"

        ok = await router.inject_packet(pkt, origin_hash="0x1a")

        self.assertTrue(ok)
        daemon._on_raw_rx_for_companions.assert_awaited_once_with(
            b"\xaa\xbb", 0, 0.0, exclude_hash="0x1a"
        )

    async def test_inject_packet_no_echo_when_tx_fails(self):
        """A failed local transmission must not echo a raw RX frame."""
        daemon = _make_daemon()
        daemon.repeater_handler = AsyncMock(return_value=False)
        daemon._on_raw_rx_for_companions = AsyncMock()
        router = PacketRouter(daemon)

        ok = await router.inject_packet(_make_packet())

        self.assertFalse(ok)
        daemon._on_raw_rx_for_companions.assert_not_awaited()

    async def test_inject_packet_survives_echo_failure(self):
        """An error while echoing must not fail the injection."""
        daemon = _make_daemon()
        daemon._on_raw_rx_for_companions = AsyncMock(side_effect=RuntimeError("boom"))
        router = PacketRouter(daemon)

        ok = await router.inject_packet(_make_packet())

        self.assertTrue(ok)
        daemon._on_raw_rx_for_companions.assert_awaited_once()

    async def test_inject_packet_without_echo_hook(self):
        """Injection succeeds even if the daemon has no raw-RX companion hook."""
        daemon = _make_daemon()
        daemon._on_raw_rx_for_companions = None
        router = PacketRouter(daemon)

        ok = await router.inject_packet(_make_packet())

        self.assertTrue(ok)