meshtastic_firmware/test/test_traffic_management/test_main.cpp

#include "MeshTypes.h" // Include BEFORE TestUtil.h - provides HAS_TRAFFIC_MANAGEMENT (via mesh-pb-constants.h)
#include "TestUtil.h"
#include <cstdlib>
#include <unity.h>

#if defined(ARCH_PORTDUINO)
#define TM_TEST_ENTRY extern "C"
#else
#define TM_TEST_ENTRY
#endif

#if HAS_TRAFFIC_MANAGEMENT

#include "airtime.h"
#include "gps/RTC.h"
#include "mesh/CryptoEngine.h"
#include "mesh/Default.h"
#include "mesh/MeshService.h"
#include "mesh/NodeDB.h"
#include "mesh/Router.h"
#include "modules/TrafficManagementModule.h"
#include "support/DeterministicRng.h" // rngSeed/rngNext/rngRange - shared seeded LCG
#include <climits>
#include <cstring>
#include <memory>
#include <pb_encode.h>
#include <vector>

namespace
{

constexpr NodeNum kLocalNode = 0x11111111;
constexpr NodeNum kRemoteNode = 0x22222222;
constexpr NodeNum kTargetNode = 0x33333333;
// A second, distinct requester. The per-requester direct-response throttle (60 s) is keyed on the
// requesting packet's `from`, so tests that exercise the per-target / fallback / sweep throttles use
// a fresh requester for their "served again" step to avoid the per-requester window masking them.
constexpr NodeNum kRemoteNode2 = 0x44444444;

// Telemetry hop exhaustion is gated on channel congestion (alterReceived checks
// airTime->isTxAllowedChannelUtil/isTxAllowedAirUtil). Installs a global
// airTime reporting 100% channel utilization for the enclosing scope.
class ScopedBusyAirTime
{
  public:
    ScopedBusyAirTime() : previous(airTime)
    {
        for (uint32_t i = 0; i < CHANNEL_UTILIZATION_PERIODS; i++)
            busy.channelUtilization[i] = 10000; // 10 s of airtime per 10 s period
        airTime = &busy;
    }
    ~ScopedBusyAirTime() { airTime = previous; }

  private:
    AirTime busy;
    AirTime *previous;
};

class MockNodeDB : public NodeDB
{
  public:
    meshtastic_NodeInfoLite *getMeshNode(NodeNum n) override
    {
        if (hasCachedNode && n == cachedNodeNum)
            return &cachedNode;
        return NodeDB::getMeshNode(n);
    }

    void clearCachedNode()
    {
        hasCachedNode = false;
        cachedNodeNum = 0;
        cachedNode = meshtastic_NodeInfoLite_init_zero;
    }

    void setCachedNode(NodeNum n)
    {
        clearCachedNode();
        hasCachedNode = true;
        cachedNodeNum = n;
        cachedNode.num = n;
        cachedNode.bitfield |= NODEINFO_BITFIELD_HAS_USER_MASK;
    }

    // Role the TMM should see for the cached node (sender-role-aware throttles).
    void setCachedNodeRole(meshtastic_Config_DeviceConfig_Role role) { cachedNode.role = role; }

    // Direct mutable access to the cached node for fine-grained bitfield manipulation in tests.
    meshtastic_NodeInfoLite &cachedNodeForTest()
    {
        hasCachedNode = true;
        return cachedNode;
    }

    // Seed a node into the hot-store buffer at index 1 (index 0 is reserved for
    // "self"). Respects the fixed-buffer invariant: `meshNodes` is a buffer of
    // MAX_NUM_NODES slots with `numMeshNodes` as the logical count - we grow the
    // buffer if needed and bump the count, never clear()/push_back() (which would
    // shrink it and break NodeDB::resetNodes()'s begin()+1..end() fill).
    void setHotNode(NodeNum n, uint8_t nextHop)
    {
        if (meshNodes->size() < 2)
            meshNodes->resize(2);
        (*meshNodes)[1] = meshtastic_NodeInfoLite_init_zero;
        (*meshNodes)[1].num = n;
        (*meshNodes)[1].next_hop = nextHop;
        numMeshNodes = 2;
    }

    // Seed a full identity (name, 32-byte key of `keyByte`, optional signer bit) into the
    // hot-store buffer at index 1, for reconcile/seeding tests that iterate
    // getMeshNodeByIndex().
    void setHotNodeIdentity(NodeNum n, const char *longName, uint8_t keyByte, bool signer)
    {
        setHotNode(n, 0);
        meshtastic_NodeInfoLite &info = (*meshNodes)[1];
        strncpy(info.long_name, longName, sizeof(info.long_name) - 1);
        info.public_key.size = 32;
        memset(info.public_key.bytes, keyByte, 32);
        info.bitfield |= NODEINFO_BITFIELD_HAS_USER_MASK;
        if (signer)
            info.bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;
    }

    // Evict everything but "self" - simulates the hot DB rolling over. Logical
    // count only; the buffer is left intact so the invariant holds.
    void rollHotStore()
    {
        numMeshNodes = 1;
        clearCachedNode();
    }

    // Seed a hot-store node that has been learned as an XEdDSA signer, with a known name, so the
    // identity-update gate can be exercised. Distinct from setCachedNode() so a separate cached
    // node (the direct-response target) can coexist.
    void setSignerHotNode(NodeNum n, const char *longName)
    {
        if (meshNodes->size() < 2)
            meshNodes->resize(2);
        (*meshNodes)[1] = meshtastic_NodeInfoLite_init_zero;
        (*meshNodes)[1].num = n;
        nodeInfoLiteSetBit(&(*meshNodes)[1], NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK, true);
        nodeInfoLiteSetBit(&(*meshNodes)[1], NODEINFO_BITFIELD_HAS_USER_MASK, true);
        strncpy((*meshNodes)[1].long_name, longName, sizeof((*meshNodes)[1].long_name) - 1);
        numMeshNodes = 2;
    }

  private:
    bool hasCachedNode = false;
    NodeNum cachedNodeNum = 0;
    meshtastic_NodeInfoLite cachedNode = meshtastic_NodeInfoLite_init_zero;
};

class MockRadioInterface : public RadioInterface
{
  public:
    ErrorCode send(meshtastic_MeshPacket *p) override
    {
        packetPool.release(p);
        return ERRNO_OK;
    }

    uint32_t getPacketTime(uint32_t totalPacketLen, bool received = false) override
    {
        (void)totalPacketLen;
        (void)received;
        return 0;
    }
};

class MockRouter : public Router
{
  public:
    ~MockRouter()
    {
        // Router allocates a global crypt lock in its constructor.
        // Clean it up here so each test can build a fresh mock router.
        delete cryptLock;
        cryptLock = nullptr;
    }

    ErrorCode send(meshtastic_MeshPacket *p) override
    {
        sentPackets.push_back(*p);
        packetPool.release(p);
        return ERRNO_OK;
    }

    std::vector<meshtastic_MeshPacket> sentPackets;
};

class TrafficManagementModuleTestShim : public TrafficManagementModule
{
  public:
    using TrafficManagementModule::alterReceived;
    using TrafficManagementModule::dropNodeInfoCacheForTest;
    using TrafficManagementModule::flushCache;
    using TrafficManagementModule::handleReceived;
    using TrafficManagementModule::markKeySignerProvenForTest;
    using TrafficManagementModule::nodeInfoCacheCapacityForTest;
    using TrafficManagementModule::peekCachedRole;
    using TrafficManagementModule::peekNodeInfoFlagsForTest;
    using TrafficManagementModule::runOnce;

    bool ignoreRequestFlag() const { return ignoreRequest; }
};

MockNodeDB *mockNodeDB = nullptr;

static void resetTrafficConfig()
{
    moduleConfig = meshtastic_LocalModuleConfig_init_zero;
    moduleConfig.has_traffic_management = true;
    moduleConfig.traffic_management = meshtastic_ModuleConfig_TrafficManagementConfig_init_zero;

    config = meshtastic_LocalConfig_init_zero;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;

    channelFile = meshtastic_ChannelFile_init_zero;
    owner.is_licensed = false;

    myNodeInfo.my_node_num = kLocalNode;

    router = nullptr;
    service = nullptr;

    mockNodeDB->resetNodes();
    mockNodeDB->clearCachedNode();
    nodeDB = mockNodeDB;

    // Virtual clock base (1 h in, so tick subtraction never underflows). Tests advance time by
    // bumping TrafficManagementModule::s_testNowMs instead of sleeping real seconds across a tick.
    TrafficManagementModule::s_testNowMs = 3600000;
}

static meshtastic_MeshPacket makeDecodedPacket(meshtastic_PortNum port, NodeNum from, NodeNum to = NODENUM_BROADCAST)
{
    meshtastic_MeshPacket packet = meshtastic_MeshPacket_init_zero;
    packet.from = from;
    packet.to = to;
    packet.id = 0x1001;
    packet.channel = 0;
    packet.hop_start = 3;
    packet.hop_limit = 3;
    packet.which_payload_variant = meshtastic_MeshPacket_decoded_tag;
    packet.decoded.portnum = port;
    packet.decoded.has_bitfield = true;
    packet.decoded.bitfield = 0;
    return packet;
}

static meshtastic_MeshPacket makeUnknownPacket(NodeNum from, NodeNum to = NODENUM_BROADCAST)
{
    meshtastic_MeshPacket packet = meshtastic_MeshPacket_init_zero;
    packet.from = from;
    packet.to = to;
    packet.id = 0x2001;
    packet.channel = 0;
    packet.hop_start = 3;
    packet.hop_limit = 3;
    packet.which_payload_variant = meshtastic_MeshPacket_encrypted_tag;
    packet.encrypted.size = 0;
    return packet;
}

static meshtastic_MeshPacket makePositionPacket(NodeNum from, int32_t lat, int32_t lon, NodeNum to = NODENUM_BROADCAST)
{
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_POSITION_APP, from, to);
    meshtastic_Position pos = meshtastic_Position_init_zero;
    pos.has_latitude_i = true;
    pos.has_longitude_i = true;
    pos.latitude_i = lat;
    pos.longitude_i = lon;

    packet.decoded.payload.size =
        pb_encode_to_bytes(packet.decoded.payload.bytes, sizeof(packet.decoded.payload.bytes), &meshtastic_Position_msg, &pos);
    return packet;
}

static meshtastic_MeshPacket makePositionPacketWithPrecision(NodeNum from, int32_t lat, int32_t lon, uint32_t precisionBits)
{
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_POSITION_APP, from, NODENUM_BROADCAST);
    meshtastic_Position pos = meshtastic_Position_init_zero;
    pos.has_latitude_i = true;
    pos.has_longitude_i = true;
    pos.latitude_i = lat;
    pos.longitude_i = lon;
    pos.precision_bits = precisionBits;

    packet.decoded.payload.size =
        pb_encode_to_bytes(packet.decoded.payload.bytes, sizeof(packet.decoded.payload.bytes), &meshtastic_Position_msg, &pos);
    return packet;
}

static bool decodePositionPayload(const meshtastic_MeshPacket &packet, meshtastic_Position &out)
{
    out = meshtastic_Position_init_zero;
    return pb_decode_from_bytes(packet.decoded.payload.bytes, packet.decoded.payload.size, &meshtastic_Position_msg, &out);
}

// Primary channel with a well-known single-byte PSK and the (empty -> preset)
// default name, so Channels::isWellKnownChannel(0) is true.
static void installWellKnownPrimaryChannel()
{
    channelFile = meshtastic_ChannelFile_init_zero;
    channelFile.channels_count = 1;
    channelFile.channels[0].index = 0;
    channelFile.channels[0].has_settings = true;
    channelFile.channels[0].role = meshtastic_Channel_Role_PRIMARY;
    channelFile.channels[0].settings.psk.size = 1;
    channelFile.channels[0].settings.psk.bytes[0] = 1;
    config.lora.use_preset = true;
    config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST;
}

// Install the well-known primary channel AND set a specific position_precision so
// shouldDropPosition() uses that precision ceiling rather than the default fallback.
// precision=0 means "no channel ceiling" and falls back to the firmware default (19 bits).
static void installWellKnownPrimaryChannelWithPrecision(uint32_t precision)
{
    installWellKnownPrimaryChannel();
    channelFile.channels[0].settings.has_module_settings = true;
    channelFile.channels[0].settings.module_settings.position_precision = precision;
}

static meshtastic_MeshPacket makeNodeInfoPacket(NodeNum from, const char *longName, const char *shortName)
{
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, from, NODENUM_BROADCAST);

    meshtastic_User user = meshtastic_User_init_zero;
    snprintf(user.id, sizeof(user.id), "!%08x", from);
    strncpy(user.long_name, longName, sizeof(user.long_name) - 1);
    strncpy(user.short_name, shortName, sizeof(user.short_name) - 1);

    packet.decoded.payload.size =
        pb_encode_to_bytes(packet.decoded.payload.bytes, sizeof(packet.decoded.payload.bytes), &meshtastic_User_msg, &user);
    return packet;
}

static meshtastic_MeshPacket makeNodeInfoPacketWithRole(NodeNum from, meshtastic_Config_DeviceConfig_Role role)
{
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, from, NODENUM_BROADCAST);

    meshtastic_User user = meshtastic_User_init_zero;
    snprintf(user.id, sizeof(user.id), "!%08x", from);
    strncpy(user.long_name, "rolenode", sizeof(user.long_name) - 1);
    strncpy(user.short_name, "rn", sizeof(user.short_name) - 1);
    user.role = role;

    packet.decoded.payload.size =
        pb_encode_to_bytes(packet.decoded.payload.bytes, sizeof(packet.decoded.payload.bytes), &meshtastic_User_msg, &user);
    return packet;
}

/**
 * Verify the module is a no-op when traffic management is disabled.
 * Important so config toggles cannot accidentally change routing behavior.
 */
static void test_tm_moduleDisabled_doesNothing(void)
{
    moduleConfig.has_traffic_management = false;
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_TEXT_MESSAGE_APP, kRemoteNode);

    ProcessMessage result = module.handleReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, stats.packets_inspected);
    TEST_ASSERT_EQUAL_UINT32(0, stats.unknown_packet_drops);
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());

    // The write-through hooks share the disabled gate: with maintenance (sweep + reconcile)
    // off, NodeDB commits must not fill the NodeInfo cache either.
    uint8_t key[32];
    memset(key, 0x42, sizeof(key));
    module.onNodeKeyCommitted(kRemoteNode, key, false);
    uint8_t out[32];
    TEST_ASSERT_FALSE(module.copyPublicKey(kRemoteNode, out, nullptr));
}

/**
 * Verify unknown-packet dropping uses N+1 threshold semantics.
 * Important to catch off-by-one regressions in drop decisions.
 */
static void test_tm_unknownPackets_dropOnNPlusOne(void)
{
    moduleConfig.traffic_management.unknown_packet_threshold = 2;
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeUnknownPacket(kRemoteNode);

    ProcessMessage r1 = module.handleReceived(packet);
    ProcessMessage r2 = module.handleReceived(packet);
    ProcessMessage r3 = module.handleReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.unknown_packet_drops);
    TEST_ASSERT_EQUAL_UINT32(3, stats.packets_inspected);
    TEST_ASSERT_TRUE(module.ignoreRequestFlag());
}

/**
 * Verify duplicate position broadcasts inside the dedup window are dropped.
 * Important because this is the primary airtime-saving behavior.
 */
static void test_tm_positionDedup_dropsDuplicateWithinWindow(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket second = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(second);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_GREATER_THAN_UINT32(0, first.decoded.payload.size);
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
    TEST_ASSERT_TRUE(module.ignoreRequestFlag());
}

/**
 * Verify changed coordinates are forwarded even with dedup enabled.
 * Important so real movement updates are never suppressed as duplicates.
 */
static void test_tm_positionDedup_allowsMovedPosition(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket moved = makePositionPacket(kRemoteNode, 384221234, -1210845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(moved);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
}

/**
 * Verify rate limiting drops only after exceeding the configured threshold.
 * Important to protect threshold semantics from off-by-one regressions.
 */
static void test_tm_rateLimit_dropsOnlyAfterThreshold(void)
{
    moduleConfig.traffic_management.rate_limit_window_secs = 60;
    moduleConfig.traffic_management.rate_limit_max_packets = 3;
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode);

    ProcessMessage r1 = module.handleReceived(packet);
    ProcessMessage r2 = module.handleReceived(packet);
    ProcessMessage r3 = module.handleReceived(packet);
    ProcessMessage r4 = module.handleReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r4));
    TEST_ASSERT_EQUAL_UINT32(1, stats.rate_limit_drops);
    TEST_ASSERT_TRUE(module.ignoreRequestFlag());
}
/**
 * Verify packets sourced from this node bypass dedup and rate limiting.
 * Important so local transmissions are not accidentally self-throttled.
 */
static void test_tm_fromUs_bypassesPositionAndRateFilters(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    moduleConfig.traffic_management.rate_limit_window_secs = 60;
    moduleConfig.traffic_management.rate_limit_max_packets = 1;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket positionPacket = makePositionPacket(kLocalNode, 374221234, -1220845678);
    meshtastic_MeshPacket textPacket = makeDecodedPacket(meshtastic_PortNum_TEXT_MESSAGE_APP, kLocalNode);

    ProcessMessage p1 = module.handleReceived(positionPacket);
    ProcessMessage p2 = module.handleReceived(positionPacket);
    ProcessMessage t1 = module.handleReceived(textPacket);
    ProcessMessage t2 = module.handleReceived(textPacket);

    meshtastic_TrafficManagementStats stats = module.getStats();
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(p1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(p2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(t1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(t2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
    TEST_ASSERT_EQUAL_UINT32(0, stats.rate_limit_drops);
}

/**
 * Verify locally addressed packets are never dropped by transit shaping.
 * Important so dedup/rate limiting do not suppress end-user delivery.
 */
static void test_tm_localDestination_bypassesTransitFilters(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    moduleConfig.traffic_management.rate_limit_window_secs = 60;
    moduleConfig.traffic_management.rate_limit_max_packets = 1;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket position1 = makePositionPacket(kRemoteNode, 374221234, -1220845678, kLocalNode);
    meshtastic_MeshPacket position2 = makePositionPacket(kRemoteNode, 374221234, -1220845678, kLocalNode);
    meshtastic_MeshPacket text1 = makeDecodedPacket(meshtastic_PortNum_TEXT_MESSAGE_APP, kRemoteNode, kLocalNode);
    meshtastic_MeshPacket text2 = makeDecodedPacket(meshtastic_PortNum_TEXT_MESSAGE_APP, kRemoteNode, kLocalNode);

    ProcessMessage p1 = module.handleReceived(position1);
    ProcessMessage p2 = module.handleReceived(position2);
    ProcessMessage t1 = module.handleReceived(text1);
    ProcessMessage t2 = module.handleReceived(text2);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(p1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(p2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(t1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(t2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
    TEST_ASSERT_EQUAL_UINT32(0, stats.rate_limit_drops);
}

/**
 * Verify router role clamps NodeInfo response hops to router-safe maximum.
 * Important so large config values cannot widen response scope unexpectedly.
 */
static void test_tm_nodeinfo_routerClamp_skipsWhenTooManyHops(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_ROUTER;
    mockNodeDB->setCachedNode(kTargetNode);

    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 5;
    request.hop_limit = 1; // 4 hops away; router clamp should cap max at 3

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, stats.nodeinfo_cache_hits);
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());
}

/**
 * Verify NodeInfo direct-response success path and reply packet fields.
 * Important because this path consumes the request and generates a spoofed cached reply.
 */
static void test_tm_nodeinfo_directResponse_respondsFromCache(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    config.lora.config_ok_to_mqtt = true;
    mockNodeDB->setCachedNode(kTargetNode);
    // Signed-only replay gate (default) requires the target be a known signer to be served.
    mockNodeDB->cachedNodeForTest().bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.id = 0x13572468;
    request.hop_start = 3;
    request.hop_limit = 3; // direct request (0 hops away)

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(result));
    TEST_ASSERT_TRUE(module.ignoreRequestFlag());
    TEST_ASSERT_EQUAL_UINT32(1, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    const meshtastic_MeshPacket &reply = mockRouter.sentPackets.front();
    TEST_ASSERT_EQUAL_INT(meshtastic_PortNum_NODEINFO_APP, reply.decoded.portnum);
    TEST_ASSERT_EQUAL_UINT32(kTargetNode, reply.from);
    TEST_ASSERT_EQUAL_UINT32(kRemoteNode, reply.to);
    TEST_ASSERT_EQUAL_UINT32(request.id, reply.decoded.request_id);
    TEST_ASSERT_FALSE(reply.decoded.want_response);
    TEST_ASSERT_EQUAL_UINT8(0, reply.hop_limit);
    TEST_ASSERT_EQUAL_UINT8(0, reply.hop_start);
    TEST_ASSERT_EQUAL_UINT8(mockNodeDB->getLastByteOfNodeNum(kRemoteNode), reply.next_hop);
    TEST_ASSERT_TRUE(reply.decoded.has_bitfield);
    TEST_ASSERT_EQUAL_UINT8(BITFIELD_OK_TO_MQTT_MASK, reply.decoded.bitfield);
}

/**
 * Verify cached direct replies still preserve requester NodeInfo learning.
 * Important so consuming the request does not skip NodeDB refresh for observers.
 */
static void test_tm_nodeinfo_directResponse_learnsRequestorNodeInfo(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->setCachedNode(kTargetNode);
    // Signed-only replay gate (default) requires the target be a known signer to be served.
    mockNodeDB->cachedNodeForTest().bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeNodeInfoPacket(kRemoteNode, "requester-long", "rq");
    request.to = kTargetNode;
    request.decoded.want_response = true;
    request.id = 0x01020304;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_NodeInfoLite *requestor = mockNodeDB->getMeshNode(kRemoteNode);

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(result));
    TEST_ASSERT_NOT_NULL(requestor);
    TEST_ASSERT_TRUE((requestor->bitfield & NODEINFO_BITFIELD_HAS_USER_MASK) != 0);
    TEST_ASSERT_EQUAL_STRING("requester-long", requestor->long_name);
    TEST_ASSERT_EQUAL_STRING("rq", requestor->short_name);
    TEST_ASSERT_EQUAL_UINT8(request.channel, requestor->channel);
}

/**
 * A unicast NodeInfo request is never signed, so a known signer's identity claim on the
 * direct-response path is unauthenticated. It must not overwrite the stored name (spoofing
 * defense), while the direct response itself still goes out. The non-signer case
 * (test_tm_nodeinfo_directResponse_learnsRequestorNodeInfo) is the control: it still learns.
 */
static void test_tm_nodeinfo_directResponse_ignoresUnsignedSignerIdentity(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->setCachedNode(kTargetNode); // the direct-response target
    // Signed-only replay gate (default) requires the target be a known signer to be served.
    mockNodeDB->cachedNodeForTest().bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;
    mockNodeDB->setSignerHotNode(kRemoteNode, "victim-real"); // the requester is a known signer

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path this test was written for
    meshtastic_MeshPacket request = makeNodeInfoPacket(kRemoteNode, "attacker-name", "atk");
    request.to = kTargetNode;
    request.decoded.want_response = true;
    request.id = 0x0A0B0C0D;
    request.hop_start = 3;
    request.hop_limit = 3;
    request.xeddsa_signed = false; // unicast: never signed

    ProcessMessage result = module.handleReceived(request);

    // The response still went out (the request was consumed from cache)...
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(1, module.getStats().nodeinfo_cache_hits);
    // ...but the known signer's stored name was not overwritten by the unauthenticated claim.
    const meshtastic_NodeInfoLite *requestor = mockNodeDB->getMeshNode(kRemoteNode);
    TEST_ASSERT_NOT_NULL(requestor);
    TEST_ASSERT_EQUAL_STRING("victim-real", requestor->long_name);
}

/**
 * Verify client role only answers direct (0-hop) NodeInfo requests.
 * Important so clients do not answer relayed requests outside intended scope.
 */
static void test_tm_nodeinfo_clientClamp_skipsWhenNotDirect(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->setCachedNode(kTargetNode);

    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 2;
    request.hop_limit = 1; // 1 hop away; clients are clamped to max 0

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, stats.nodeinfo_cache_hits);
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());
}

/**
 * Verify the NodeDB-fallback path requires NodeDB for direct NodeInfo responses.
 * Important because fallback should only happen through node-wide data when
 * the dedicated NodeInfo cache does not exist.
 */
static void test_tm_nodeinfo_directResponse_withoutNodeDbEntry_skips(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());
    TEST_ASSERT_EQUAL_UINT32(0, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}

#if TMM_HAS_NODEINFO_CACHE
/**
 * Verify the NodeInfo cache can answer requests without NodeDB and that
 * shouldRespondToNodeInfo() uses cached bitfield metadata.
 */
static void test_tm_nodeinfo_directResponse_psramCacheRespondsAndPreservesBitfield(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    config.lora.config_ok_to_mqtt = true;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket observed = makeNodeInfoPacket(kTargetNode, "target-long", "tg");
    observed.decoded.has_bitfield = true;
    observed.decoded.bitfield = BITFIELD_WANT_RESPONSE_MASK;
    observed.channel = 2;
    observed.rx_time = 123456;
    observed.has_rx_time = true; // rx_time has explicit presence; mark this synthetic reading as measured

    ProcessMessage observedResult = module.handleReceived(observed);
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(observedResult));
    // Signed-only replay gate (default) requires signer-proven provenance to serve.
    module.markKeySignerProvenForTest(kTargetNode);

    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.id = 0x24681357;
    request.channel = 1;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(result));
    TEST_ASSERT_TRUE(module.ignoreRequestFlag());
    TEST_ASSERT_EQUAL_UINT32(1, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    const meshtastic_MeshPacket &reply = mockRouter.sentPackets.front();
    TEST_ASSERT_TRUE(reply.decoded.has_bitfield);
    TEST_ASSERT_EQUAL_UINT8(static_cast<uint8_t>(BITFIELD_WANT_RESPONSE_MASK | BITFIELD_OK_TO_MQTT_MASK), reply.decoded.bitfield);
    TEST_ASSERT_EQUAL_UINT32(kTargetNode, reply.from);
    TEST_ASSERT_EQUAL_UINT32(kRemoteNode, reply.to);
    TEST_ASSERT_EQUAL_UINT8(request.channel, reply.channel);
    TEST_ASSERT_EQUAL_UINT32(request.id, reply.decoded.request_id);
}

/**
 * Verify NodeInfo cache misses do not fall back to NodeDB.
 * Important so the dedicated cache index stays logically separate from
 * NodeInfoModule/NodeDB when the cache is available.
 */
static void test_tm_nodeinfo_directResponse_psramMissDoesNotFallbackToNodeDb(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->setCachedNode(kTargetNode);

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());
    TEST_ASSERT_EQUAL_UINT32(0, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}

/**
 * Verify a cached NodeInfo is NOT served once it ages past the serve window.
 * Important: without this gate a long-gone (or forged) node's cached NodeInfo would be
 * spoofed back to requestors indefinitely while the genuine request is suppressed.
 */
static void test_tm_nodeinfo_directResponse_psramStaleEntryNotServed(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // Learn a NodeInfo for the target into the NodeInfo cache (broadcast, so it is only cached).
    meshtastic_MeshPacket observed = makeNodeInfoPacket(kTargetNode, "target-long", "tg");
    module.handleReceived(observed);
    // Signer-proven so staleness is the sole reason it is not served (isolates the gate under test).
    module.markKeySignerProvenForTest(kTargetNode);

    // Advance the virtual clock just past the 6 h serve window.
    // 6 h + two 3-min observation ticks: guarantees the modular obs-tick age exceeds the
    // 120-tick serve window whatever the clock's offset within its current tick.
    TrafficManagementModule::s_testNowMs += (6UL * 60UL * 60UL * 1000UL) + (2UL * 3UL * 60UL * 1000UL);

    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}

/**
 * Per-target direct-response throttle on the PSRAM cache path: repeated NodeInfo requests for the
 * same target yield one spoofed reply per 60 s window - even from a DIFFERENT requester, since the
 * target axis is independent of the requester axis - then a reply is allowed again once it elapses.
 */
static void test_tm_nodeinfo_directResponse_psramThrottlesWithinWindow(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket observed = makeNodeInfoPacket(kTargetNode, "target-long", "tg");
    module.handleReceived(observed);
    // Signed-only replay gate (default) requires signer-proven provenance to serve.
    module.markKeySignerProvenForTest(kTargetNode);

    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    // First request: served.
    request.id = 0xAAAA0001;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // Second request within the window, from a DIFFERENT requester so only the per-target axis can
    // throttle it: our spoofed TX is suppressed, but the request is NOT consumed - it CONTINUEs into
    // normal relay handling so the genuine target can answer itself. (Previously it was black-holed:
    // STOPped with nothing sent.) The cache-hit stat counts only replies actually sent.
    TrafficManagementModule::s_testNowMs += 5000; // 5 s < 60 s window
    request.from = kRemoteNode2;
    request.id = 0xAAAA0002;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));
    TEST_ASSERT_EQUAL_UINT32(1, module.getStats().nodeinfo_cache_hits);

    // Past the per-target window: served again. Back to the original requester, whose own 60 s
    // per-requester window from the first reply has also elapsed, so only the per-target release is
    // under test here.
    TrafficManagementModule::s_testNowMs += 60000; // now > 60 s since first reply
    request.from = kRemoteNode;
    request.id = 0xAAAA0003;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(2, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}

#if !(MESHTASTIC_EXCLUDE_PKI)
// Build a NODEINFO_APP broadcast whose User carries a 32-byte public key of `keyByte`.
static meshtastic_MeshPacket makeNodeInfoPacketWithKey(NodeNum from, const char *longName, uint8_t keyByte)
{
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, from, NODENUM_BROADCAST);
    meshtastic_User user = meshtastic_User_init_zero;
    snprintf(user.id, sizeof(user.id), "!%08x", from);
    strncpy(user.long_name, longName, sizeof(user.long_name) - 1);
    user.public_key.size = 32;
    memset(user.public_key.bytes, keyByte, 32);
    packet.decoded.payload.size =
        pb_encode_to_bytes(packet.decoded.payload.bytes, sizeof(packet.decoded.payload.bytes), &meshtastic_User_msg, &user);
    return packet;
}

/**
 * Verify the NodeInfo cache pins the first-seen public key: a later NodeInfo for the same
 * node carrying a DIFFERENT key is rejected, and the served reply keeps the original key.
 * Mirrors NodeDB::updateUser()'s "Public Key mismatch, dropping NodeInfo" protection.
 */
static void test_tm_nodeinfo_cache_rejectsMismatchedKey(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode(); // no authoritative NodeDB key -> exercise the cache's own TOFU pin

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // First-seen key (0x11...) is pinned.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "genuine", 0x11));
    // Poisoning attempt with a different key (0x22...) must be rejected.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "attacker", 0x22));
    // Signed-only replay gate (default) requires signer-proven provenance to serve the reply.
    module.markKeySignerProvenForTest(kTargetNode);

    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // The served reply must still carry the original (pinned) key, not the attacker's.
    meshtastic_User served = meshtastic_User_init_zero;
    const meshtastic_MeshPacket &reply = mockRouter.sentPackets.front();
    TEST_ASSERT_TRUE(
        pb_decode_from_bytes(reply.decoded.payload.bytes, reply.decoded.payload.size, &meshtastic_User_msg, &served));
    TEST_ASSERT_EQUAL_UINT32(32, served.public_key.size);
    TEST_ASSERT_EQUAL_UINT8(0x11, served.public_key.bytes[0]);
    TEST_ASSERT_EQUAL_UINT8(0x11, served.public_key.bytes[31]);
}

#if WARM_NODE_COUNT > 0
/**
 * Verify the NodeInfo cache pin also covers the WARM tier: for a node evicted from the hot
 * store whose key lives only in the warm tier (and whose cache slot is empty), a NodeInfo
 * carrying a different key must be rejected, and one carrying the warm key accepted.
 * Important: with a hot-store-only pin, an attacker could seed this cache with a bogus key
 * for a warm-evicted node; the cache's own TOFU pin would then lock the genuine node's
 * frames out until the poisoned entry aged away.
 */
static void test_tm_nodeinfo_cache_pinsAgainstWarmTierKey(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode(); // hot store misses...
    uint8_t warmKey[32];
    memset(warmKey, 0x55, 32);
    mockNodeDB->warmStore.clear();
    mockNodeDB->warmStore.absorb(kTargetNode, 1000000, warmKey); // ...but the warm tier holds the key

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // Poisoning attempt with a key that mismatches the warm tier: must not be cached.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "attacker", 0x66));
    uint8_t out[32] = {0};
    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, out, nullptr));

    // The genuine key (matching the warm tier) is accepted.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "genuine", 0x55));
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0x55, out[0]);
    TEST_ASSERT_EQUAL_UINT8(0x55, out[31]);

    mockNodeDB->warmStore.clear();
}

/**
 * Unsigned-identity gate, warm tier: a verified signer evicted to the warm tier must not be
 * impersonatable. An attacker can forge an unsigned NodeInfo carrying the signer's real
 * (public!) key - it passes the key pin and would inherit warm signer provenance - so the
 * gate must classify warm-tier signers, not only hot-store ones. A signature-verified frame
 * (control) is still learned.
 */
static void test_tm_nodeinfo_gate_blocksUnsignedWarmSignerForgery(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore(); // hot store misses; only the warm tier knows the signer
    uint8_t warmKey[32];
    memset(warmKey, 0x5A, 32);
    mockNodeDB->warmStore.clear();
    mockNodeDB->warmStore.absorb(kTargetNode, 1000000, warmKey, 0, 0, /*signer=*/true);

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // Forgery: unsigned NodeInfo with the REAL key (passes the pin) and an attacker name.
    meshtastic_MeshPacket forged = makeNodeInfoPacketWithKey(kTargetNode, "attacker", 0x5A);
    forged.xeddsa_signed = false;
    module.handleReceived(forged);
    TEST_ASSERT_EQUAL_INT(-1, module.peekNodeInfoFlagsForTest(kTargetNode)); // nothing cached
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr));

    // Control: the same identity, signature-verified, is learned.
    meshtastic_MeshPacket genuine = makeNodeInfoPacketWithKey(kTargetNode, "genuine", 0x5A);
    genuine.xeddsa_signed = true;
    module.handleReceived(genuine);
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_STRING("genuine", out.long_name);

    mockNodeDB->warmStore.clear();
}

/**
 * Reconcile seeding, serve-gate honesty: a hot-store identity is seeded into the cache by
 * the maintenance sweep (name + key + signer provenance usable via copyUser/copyPublicKey),
 * but is NEVER served as a spoofed reply until a genuine NODEINFO frame is heard - seeding
 * and retention must not make a silent node look alive.
 */
static void test_tm_nodeinfo_reconcile_seedsFromHotStoreButNeverServes(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->warmStore.clear();
    mockNodeDB->setHotNodeIdentity(kTargetNode, "hot-name", 0x77, /*signer=*/true);

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.runOnce(); // maintenance sweep -> reconcile seeds the hot identity

    // Seeded identity is available to the key pool and name rehydration...
    uint8_t key[32] = {0};
    bool proven = false;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x77, key[0]);
    TEST_ASSERT_TRUE(proven); // inherited from the hot store's signer bit, key-matched
    meshtastic_User seeded = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, seeded, nullptr));
    TEST_ASSERT_EQUAL_STRING("hot-name", seeded.long_name);

    // ...but a request for it is NOT answered: never observed, so never servable.
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // A genuinely observed frame (key matches the NodeDB pin) makes it servable. The node is
    // a known signer, so per #11035 only a signature-verified frame may drive cache writes -
    // mark it as Router-verified, as the real receive path would.
    meshtastic_MeshPacket observed = makeNodeInfoPacketWithKey(kTargetNode, "hot-name", 0x77);
    observed.xeddsa_signed = true;
    module.handleReceived(observed);
    request.id = 0xCCCC0002;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    mockNodeDB->rollHotStore();
}

/**
 * Reconcile seeding from the warm tier yields a key-only record: usable by copyPublicKey
 * (with the warm signer bit inherited), but never by copyUser - the warm tier keeps no
 * names, and a nameless User must not reach name-rehydration.
 */
static void test_tm_nodeinfo_reconcile_seedsKeyOnlyFromWarmTier(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    uint8_t warmKey[32];
    memset(warmKey, 0x44, 32);
    mockNodeDB->warmStore.clear();
    mockNodeDB->warmStore.absorb(kTargetNode, 1000000, warmKey, 0, 0, /*signer=*/true);

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.runOnce();

    uint8_t key[32] = {0};
    bool proven = false;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x44, key[31]);
    TEST_ASSERT_TRUE(proven);
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr)); // key-only record

    mockNodeDB->warmStore.clear();
}

/**
 * Reconcile must not let a keyless hot-store identity erase a TOFU key this cache already
 * learned (the same merge rule as onNodeIdentityCommitted): the hot name is adopted, the
 * kept key survives for the copyPublicKey pool - and stays unproven, because the hot signer
 * bit vouches only for a NodeDB-supplied key, never the kept TOFU one.
 */
static void test_tm_nodeinfo_reconcile_keepsTofuKeyOnKeylessHotIdentity(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    mockNodeDB->warmStore.clear();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // TOFU learn while NodeDB knows nothing about the node.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "tofu-name", 0x33));
    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));

    // NodeDB then learns the node with a User but NO key; its signed bit is even set, which
    // must vouch for nothing here since NodeDB supplies no key to match it against.
    mockNodeDB->setSignerHotNode(kTargetNode, "hot-name");
    module.runOnce(); // maintenance sweep -> reconcile adopts the hot identity

    bool proven = true;
    memset(key, 0, sizeof(key));
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven)); // TOFU key survived
    TEST_ASSERT_EQUAL_UINT8(0x33, key[0]);
    TEST_ASSERT_EQUAL_UINT8(0x33, key[31]);
    TEST_ASSERT_FALSE(proven);
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_STRING("hot-name", out.long_name); // hot identity adopted

    mockNodeDB->rollHotStore();
}

/**
 * Write-through hook: an identity committed through NodeDB::updateUser() lands in the
 * NodeInfo cache immediately (name + key), without waiting for a maintenance sweep - and
 * is still not servable, because the node was never actually heard.
 */
static void test_tm_nodeinfo_updateUserHook_writesThrough(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    mockNodeDB->warmStore.clear();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    trafficManagementModule = &module; // the NodeDB hook reaches the module via the global

    meshtastic_User user = meshtastic_User_init_zero;
    strncpy(user.long_name, "committed", sizeof(user.long_name) - 1);
    user.public_key.size = 32;
    memset(user.public_key.bytes, 0x5A, 32);
    mockNodeDB->updateUser(kTargetNode, user, 0);

    // Immediately visible to the key pool and name rehydration (no sweep has run)...
    uint8_t key[32] = {0};
    bool proven = true;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x5A, key[0]);
    TEST_ASSERT_FALSE(proven); // committed TOFU key: no signer bit on the node yet
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_STRING("committed", out.long_name);

    // ...but known-not-heard is never servable.
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
    // trafficManagementModule and the hot store are reset in tearDown()/setUp().
}

/**
 * Full removal: NodeDB::removeNodeByNum() must purge this module's caches too - both the
 * NodeInfo identity entry (name/key) and the unified slot (next-hop hint etc.) - or the
 * deleted identity would keep feeding the key pool and resurrect on next contact.
 */
static void test_tm_nodeinfo_removeNode_purgesCaches(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    mockNodeDB->warmStore.clear();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    trafficManagementModule = &module; // the NodeDB purge hook reaches the module via the global

    // Learn an identity (observed frame) and a routing hint for the node.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "victim", 0x37));
    module.setNextHop(kTargetNode, 0x42);
    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0x42, module.getNextHopHint(kTargetNode));

    mockNodeDB->removeNodeByNum(kTargetNode);

    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, key, nullptr));
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0, module.getNextHopHint(kTargetNode));
    TEST_ASSERT_EQUAL_INT(-1, module.peekNodeInfoFlagsForTest(kTargetNode));
    // trafficManagementModule is reset in tearDown().
}

/**
 * No timed eviction: a quiet keyed entry survives arbitrarily long (its key keeps feeding
 * the pubkey pool via copyPublicKey), while tick saturation stops it being SERVED long
 * before that. Slots are reclaimed only by LRU pressure on insert or an explicit purge.
 */
static void test_tm_nodeinfo_noTimedEviction_quietKeyedEntrySurvives(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    mockNodeDB->warmStore.clear();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "quiet", 0x21));
    module.markKeySignerProvenForTest(kTargetNode); // isolate: staleness, not the signed gate

    // Nine days of silence, swept every three days. The old design would have evicted the
    // entry at the 7-day retention TTL; now nothing expires by timer.
    for (int i = 0; i < 3; i++) {
        TrafficManagementModule::s_testNowMs += 3UL * 24UL * 60UL * 60UL * 1000UL;
        module.runOnce();
    }

    // The key still feeds the pool...
    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0x21, key[0]);

    // ...but the serve gate saturated long ago: the request propagates unanswered.
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}
#endif // WARM_NODE_COUNT > 0

/**
 * Feature #2: a key learned from an (unsigned) NodeInfo is served by copyPublicKey() as a
 * trust-on-first-use key, so it can extend the encryption pool. signerProven must be false.
 */
static void test_tm_nodeinfo_copyPublicKey_servesTofuKey(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "genuine", 0x33));

    uint8_t key[32] = {0};
    bool proven = true; // must be overwritten to false
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x33, key[0]);
    TEST_ASSERT_EQUAL_UINT8(0x33, key[31]);
    TEST_ASSERT_FALSE(proven);
}

/**
 * Feature #1: a later signature-verified NodeInfo upgrades the cached key's provenance to
 * signer-proven (monotonic), while the key bytes stay pinned.
 */
static void test_tm_nodeinfo_copyPublicKey_upgradesToSignerProven(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // First contact is unsigned -> TOFU.
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "genuine", 0x44));
    uint8_t key[32] = {0};
    bool proven = true;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_FALSE(proven);

    // A later frame whose signature we verified upgrades provenance.
    meshtastic_MeshPacket signed_ni = makeNodeInfoPacketWithKey(kTargetNode, "genuine", 0x44);
    signed_ni.xeddsa_signed = true;
    module.handleReceived(signed_ni);

    proven = false;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_TRUE(proven);
    TEST_ASSERT_EQUAL_UINT8(0x44, key[0]); // key unchanged
}

/**
 * copyPublicKey() reports a miss (false) for a node we have never cached.
 */
static void test_tm_nodeinfo_copyPublicKey_missReturnsFalse(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module;
    uint8_t key[32] = {0};
    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, key, nullptr));
}

/**
 * copyUser() returns the full cached identity (name + key) for name rehydration, and reports a
 * miss for an uncached node.
 */
static void test_tm_nodeinfo_copyUser_returnsCachedIdentity(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "target-long", 0x77));

    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_STRING("target-long", out.long_name);
    TEST_ASSERT_EQUAL_UINT32(32, out.public_key.size);
    TEST_ASSERT_EQUAL_UINT8(0x77, out.public_key.bytes[0]);

    // Uncached node -> miss.
    meshtastic_User miss = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kRemoteNode, miss, nullptr));
}

#if TMM_NODEINFO_REPLAY_SIGNED_GATE
/**
 * Replay gate (cache path): a fresh but trust-on-first-use (never signer-proven) cached entry
 * is withheld - the reply is suppressed though the entry is fresh.
 */
static void test_tm_nodeinfo_directResponse_psramUnsignedNotServed(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    // Cache a fresh but unsigned (TOFU) NodeInfo and do NOT mark it signer-proven.
    module.handleReceived(makeNodeInfoPacket(kTargetNode, "target-long", "tg"));

    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}
#endif // TMM_NODEINFO_REPLAY_SIGNED_GATE
#endif // !MESHTASTIC_EXCLUDE_PKI

// Bit positions returned by peekNodeInfoFlagsForTest().
constexpr int kFlagObserved = 1;
constexpr int kFlagMember = 2;
constexpr int kFlagFullUser = 4;

/**
 * Key-commit hook (ported from tmm-fix-superset): a TOFU learn lands the key in the pool
 * without a User payload; manual verification upgrades provenance; a NodeDB-senior rotation
 * replaces the key and never inherits the old key's verdict.
 */
static void test_tm_nodeinfo_keyHook_upsertsAndGovernsProvenance(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module;

    uint8_t k[32];
    memset(k, 0x99, sizeof(k));
    module.onNodeKeyCommitted(kTargetNode, k, false); // TOFU-grade learn
    uint8_t key[32] = {0};
    bool proven = true;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x99, key[0]);
    TEST_ASSERT_FALSE(proven);
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr)); // key-only: nothing to rehydrate

    module.onNodeKeyCommitted(kTargetNode, k, true); // manual verification of the same key
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_TRUE(proven);

    uint8_t rotated[32];
    memset(rotated, 0xAA, sizeof(rotated));
    module.onNodeKeyCommitted(kTargetNode, rotated, false); // NodeDB-senior rotation
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0xAA, key[0]);
    TEST_ASSERT_FALSE(proven); // rotated key must not inherit the old key's verdict
}

/**
 * Tick saturation (ported from tmm-fix-superset): the sweep clears hasObserved once the
 * serve window passes, the entry itself persists (no TTL eviction), and a full 256-tick
 * wrap of the clock cannot alias a saturated stamp back to "fresh".
 */
static void test_tm_nodeinfo_tickSaturation_sweepClearsObserved(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->warmStore.clear();
    mockNodeDB->rollHotStore();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.handleReceived(makeNodeInfoPacket(kTargetNode, "target-long", "tg"));
    module.markKeySignerProvenForTest(kTargetNode);
    const uint32_t stampMs = TrafficManagementModule::s_testNowMs;
    int flags = module.peekNodeInfoFlagsForTest(kTargetNode);
    TEST_ASSERT_TRUE(flags >= 0 && (flags & kFlagObserved));

    // Past the serve window (plus one tick for granularity): the sweep saturates the stamp
    // but keeps the entry.
    TrafficManagementModule::s_testNowMs += (6UL * 60UL * 60UL * 1000UL) + 180000UL + 1000UL;
    module.runOnce();
    flags = module.peekNodeInfoFlagsForTest(kTargetNode);
    TEST_ASSERT_TRUE(flags >= 0);
    TEST_ASSERT_FALSE(flags & kFlagObserved);

    // Advance to exactly one full uint8 tick period after the original stamp: the raw tick
    // age would read ~0 (fresh) if the bit were still trusted. It isn't - the cleared bit,
    // not the tick value, is authoritative.
    TrafficManagementModule::s_testNowMs = stampMs + 256UL * 180000UL;
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}

/**
 * Membership marking: the hourly reconcile marks entries whose node exists in NodeDB and
 * clears the mark when the node is gone. A plain 60 s sweep does NOT refresh membership
 * (that per-entry NodeDB scan was moved into the reconcile), so a passive NodeDB eviction
 * lags by up to an hour; the entry itself persists (no TTL) and reconciliation-seeded
 * identities stay unservable.
 */
static void test_tm_nodeinfo_reconcileMembershipMarking(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->warmStore.clear();
    mockNodeDB->setHotNodeIdentity(kTargetNode, "seeded-name", 0x5C, /*signer=*/false);

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.runOnce(); // boot reconciliation pass seeds the hot identity
    int flags = module.peekNodeInfoFlagsForTest(kTargetNode);
    TEST_ASSERT_TRUE(flags >= 0);
    TEST_ASSERT_TRUE(flags & kFlagMember);
    TEST_ASSERT_TRUE(flags & kFlagFullUser);
    TEST_ASSERT_FALSE(flags & kFlagObserved);

    // Node drops out of NodeDB entirely. Membership is refreshed by the hourly reconcile,
    // not the per-minute sweep, so the very next sweep still shows the stale member bit -
    // the documented up-to-an-hour lag for passive evictions.
    mockNodeDB->rollHotStore();
    module.runOnce();
    flags = module.peekNodeInfoFlagsForTest(kTargetNode);
    TEST_ASSERT_TRUE(flags >= 0);
    TEST_ASSERT_TRUE(flags & kFlagMember); // stale by design between reconciles

    // After a reconcile interval's worth of sweeps, the mark is cleared.
    for (int i = 0; i < 60; i++)
        module.runOnce();
    flags = module.peekNodeInfoFlagsForTest(kTargetNode);
    TEST_ASSERT_TRUE(flags >= 0);           // entry persists (no TTL) ...
    TEST_ASSERT_FALSE(flags & kFlagMember); // ... but is no longer pinned as a member
}

/**
 * cacheNodeInfoPacket() normalizes user.id to the packet sender: a payload claiming another
 * node's id string must not plant a mismatched id into served replies or rehydrated names.
 */
static void test_tm_nodeinfo_cache_normalizesSpoofedUserId(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kTargetNode, NODENUM_BROADCAST);
    meshtastic_User user = meshtastic_User_init_zero;
    snprintf(user.id, sizeof(user.id), "!%08x", static_cast<unsigned>(kRemoteNode)); // spoofed id
    strncpy(user.long_name, "spoofer", sizeof(user.long_name) - 1);
    packet.decoded.payload.size =
        pb_encode_to_bytes(packet.decoded.payload.bytes, sizeof(packet.decoded.payload.bytes), &meshtastic_User_msg, &user);
    module.handleReceived(packet);

    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));
    char expected[16];
    snprintf(expected, sizeof(expected), "!%08x", static_cast<unsigned>(kTargetNode));
    TEST_ASSERT_EQUAL_STRING(expected, out.id);
}

/**
 * The write-through hooks share the module-enabled gate with maintenance: while traffic
 * management is disabled in moduleConfig, neither hook fills the cache (content and
 * maintenance stay keyed to the same condition); re-enabling restores write-through.
 */
static void test_tm_nodeinfo_hooks_noopWhileModuleDisabled(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module; // constructed while enabled, so the cache is allocated

    moduleConfig.has_traffic_management = false;
    uint8_t k[32];
    memset(k, 0x6B, sizeof(k));
    module.onNodeKeyCommitted(kTargetNode, k, true);
    meshtastic_User user = meshtastic_User_init_zero;
    strncpy(user.long_name, "disabled", sizeof(user.long_name) - 1);
    module.onNodeIdentityCommitted(kTargetNode, user, false);

    uint8_t key[32] = {0};
    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, key, nullptr));
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_INT(-1, module.peekNodeInfoFlagsForTest(kTargetNode));

    // Control: the same hook lands once the module is enabled again.
    moduleConfig.has_traffic_management = true;
    module.onNodeKeyCommitted(kTargetNode, k, true);
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0x6B, key[0]);
}

// Build a User for onNodeIdentityCommitted; keyByte < 0 means a keyless commit.
static meshtastic_User makeCommittedUser(const char *longName, int keyByte)
{
    meshtastic_User user = meshtastic_User_init_zero;
    strncpy(user.long_name, longName, sizeof(user.long_name) - 1);
    if (keyByte >= 0) {
        user.public_key.size = 32;
        memset(user.public_key.bytes, static_cast<uint8_t>(keyByte), 32);
    }
    return user;
}

/**
 * Identity write-through hook, key semantics: a keyless commit keeps an already-learned key
 * (NodeDB may commit an unpinned identity); provenance follows the committed key - kept
 * while the key is unchanged, granted by signerKnown, and reset by a rotation.
 */
static void test_tm_nodeinfo_identityHook_keySemantics(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module;

    // TOFU-grade identity commit with key K1.
    module.onNodeIdentityCommitted(kTargetNode, makeCommittedUser("first", 0x51), false);
    uint8_t key[32] = {0};
    bool proven = true;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x51, key[0]);
    TEST_ASSERT_FALSE(proven);

    // Keyless commit: the name updates but the learned key must survive, still unproven.
    module.onNodeIdentityCommitted(kTargetNode, makeCommittedUser("renamed", -1), false);
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, &proven));
    TEST_ASSERT_EQUAL_STRING("renamed", out.long_name);
    TEST_ASSERT_EQUAL_UINT32(32, out.public_key.size);
    TEST_ASSERT_EQUAL_UINT8(0x51, out.public_key.bytes[0]);
    TEST_ASSERT_FALSE(proven);

    // signerKnown commit of the same key grants provenance...
    module.onNodeIdentityCommitted(kTargetNode, makeCommittedUser("proven", 0x51), true);
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_TRUE(proven);

    // ...which a later same-key commit without the signer verdict does not revoke...
    module.onNodeIdentityCommitted(kTargetNode, makeCommittedUser("still-proven", 0x51), false);
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_TRUE(proven);

    // ...but a rotated key never inherits the old key's verdict.
    module.onNodeIdentityCommitted(kTargetNode, makeCommittedUser("rotated", 0x52), false);
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, &proven));
    TEST_ASSERT_EQUAL_UINT8(0x52, key[0]);
    TEST_ASSERT_FALSE(proven);
}

/**
 * Read gate: copyPublicKey()/copyUser() share the module-enabled gate with the writers, so a
 * cache populated while enabled stops feeding PKI resolution and name rehydration the moment
 * the module is disabled - and resumes when re-enabled (the entry itself is never freed).
 */
static void test_tm_nodeinfo_reads_gatedWhileModuleDisabled(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module;

    // Populate while enabled (setUp left has_traffic_management = true).
    module.onNodeIdentityCommitted(kTargetNode, makeCommittedUser("present", 0x7C), false);
    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));

    // Disabled: the frozen entry persists but the accessors refuse to serve it.
    moduleConfig.has_traffic_management = false;
    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, key, nullptr));
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr));

    // Re-enabled: same entry served again (nothing was purged).
    moduleConfig.has_traffic_management = true;
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0x7C, key[0]);
    TEST_ASSERT_TRUE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_STRING("present", out.long_name);
}

#if !(MESHTASTIC_EXCLUDE_PKI)
// Fill `count` NodeInfo cache slots with keyless observed strangers (eviction tier 0),
// numbered from `baseNode`.
static void fillNodeInfoCacheWithKeylessStrangers(TrafficManagementModuleTestShim &module, uint32_t count, NodeNum baseNode)
{
    for (uint32_t i = 0; i < count; i++)
        module.handleReceived(makeNodeInfoPacket(baseNode + i, "filler", "fl"));
}

// Fill `count` NodeInfo cache slots with TOFU-keyed observed strangers (eviction tier 1),
// numbered from `baseNode`, all sharing key byte 0x0F.
static void fillNodeInfoCacheWithTofuStrangers(TrafficManagementModuleTestShim &module, uint32_t count, NodeNum baseNode)
{
    for (uint32_t i = 0; i < count; i++)
        module.handleReceived(makeNodeInfoPacketWithKey(baseNode + i, "filler", 0x0F));
}

/**
 * Tiered LRU eviction, tier boundaries: with the cache exactly full, a new stranger's insert
 * evicts a keyless stranger - never a TOFU-keyed entry, a signer-proven entry, or a NodeDB
 * member - even though those higher-tier entries are the OLDEST observations in the cache
 * (tier outranks recency).
 */
static void test_tm_nodeinfo_eviction_keyedTiersOutrankKeyless(void)
{
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    TrafficManagementModuleTestShim module;

    constexpr NodeNum kTofu = 0x51000001, kProven = 0x51000002, kMember = 0x51000003, kNewcomer = 0x51000004;
    module.handleReceived(makeNodeInfoPacketWithKey(kTofu, "tofu", 0x11));
    module.handleReceived(makeNodeInfoPacketWithKey(kProven, "proven", 0x22));
    module.markKeySignerProvenForTest(kProven);
    uint8_t memberKey[32];
    memset(memberKey, 0x33, sizeof(memberKey));
    module.onNodeKeyCommitted(kMember, memberKey, false);

    // Age the specials by two observation ticks, then fill every remaining slot with
    // fresher keyless strangers so the cache is exactly full.
    TrafficManagementModule::s_testNowMs += 2UL * 180000UL;
    const uint16_t cap = TrafficManagementModuleTestShim::nodeInfoCacheCapacityForTest();
    fillNodeInfoCacheWithKeylessStrangers(module, cap - 3u, 0x40000000);

    // The newcomer's insert must claim a keyless slot.
    module.handleReceived(makeNodeInfoPacket(kNewcomer, "newcomer", "nc"));

    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kTofu, key, nullptr));
    TEST_ASSERT_TRUE(module.copyPublicKey(kProven, key, nullptr));
    TEST_ASSERT_TRUE(module.copyPublicKey(kMember, key, nullptr));
    TEST_ASSERT_TRUE(module.peekNodeInfoFlagsForTest(kNewcomer) >= 0);
}

/**
 * Tiered LRU eviction, keyed tiers: in a cache saturated with TOFU-keyed strangers, keyed
 * inserts displace TOFU entries while a signer-proven stranger and a NodeDB member survive
 * (keyless < TOFU < signer-proven, +membership).
 */
static void test_tm_nodeinfo_eviction_tofuLosesBeforeProvenAndMember(void)
{
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    TrafficManagementModuleTestShim module;

    constexpr NodeNum kFillBase = 0x40000000;
    constexpr NodeNum kProven = 0x52000001, kMember = 0x52000002, kNew1 = 0x52000003, kNew2 = 0x52000004;

    const uint16_t cap = TrafficManagementModuleTestShim::nodeInfoCacheCapacityForTest();
    fillNodeInfoCacheWithTofuStrangers(module, cap - 2u, kFillBase);
    module.handleReceived(makeNodeInfoPacketWithKey(kProven, "proven", 0x22));
    module.markKeySignerProvenForTest(kProven);
    uint8_t memberKey[32];
    memset(memberKey, 0x33, sizeof(memberKey));
    module.onNodeKeyCommitted(kMember, memberKey, false);

    // Age the saturated cache so each newcomer is fresher than the remaining fillers
    // (otherwise the second insert would reclaim the first newcomer's equal-age slot).
    TrafficManagementModule::s_testNowMs += 2UL * 180000UL;
    module.handleReceived(makeNodeInfoPacketWithKey(kNew1, "new1", 0x44));
    module.handleReceived(makeNodeInfoPacketWithKey(kNew2, "new2", 0x55));

    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kProven, key, nullptr));
    TEST_ASSERT_TRUE(module.copyPublicKey(kMember, key, nullptr));
    TEST_ASSERT_TRUE(module.copyPublicKey(kNew1, key, nullptr));
    TEST_ASSERT_TRUE(module.copyPublicKey(kNew2, key, nullptr));
    // The two victims were the first TOFU fillers scanned, not the protected entries.
    TEST_ASSERT_FALSE(module.copyPublicKey(kFillBase + 0, key, nullptr));
    TEST_ASSERT_FALSE(module.copyPublicKey(kFillBase + 1, key, nullptr));
}

/**
 * Within-tier LRU: among same-tier entries the stalest observation is evicted first, not
 * whichever slot happens to be scanned first.
 */
static void test_tm_nodeinfo_eviction_withinTierStalestLoses(void)
{
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    TrafficManagementModuleTestShim module;

    constexpr NodeNum kFillBase = 0x40000000;
    constexpr NodeNum kStale = 0x53000001, kNewcomer = 0x53000002;
    module.handleReceived(makeNodeInfoPacketWithKey(kStale, "stale", 0x11));

    // Everything else is observed two ticks later...
    TrafficManagementModule::s_testNowMs += 2UL * 180000UL;
    const uint16_t cap = TrafficManagementModuleTestShim::nodeInfoCacheCapacityForTest();
    fillNodeInfoCacheWithTofuStrangers(module, cap - 1u, kFillBase);

    // ...so the newcomer's insert reclaims kStale's slot specifically.
    module.handleReceived(makeNodeInfoPacketWithKey(kNewcomer, "newcomer", 0x22));

    uint8_t key[32] = {0};
    TEST_ASSERT_FALSE(module.copyPublicKey(kStale, key, nullptr));
    TEST_ASSERT_TRUE(module.peekNodeInfoFlagsForTest(kNewcomer) >= 0);
    TEST_ASSERT_TRUE(module.copyPublicKey(kFillBase + 0, key, nullptr)); // fresher same-tier entry survives
}

/**
 * Member saturation: with every slot holding a NodeDB member, the write-through hooks skip
 * rather than churn one member out for another (spareMembers), while the packet path - a
 * genuinely observed frame - does evict a member.
 */
static void test_tm_nodeinfo_memberSaturated_hooksSkipPacketPathEvicts(void)
{
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();
    TrafficManagementModuleTestShim module;

    constexpr NodeNum kFillBase = 0x40000000;
    constexpr NodeNum kExtra = 0x54000001, kObserved = 0x54000002;

    const uint16_t cap = TrafficManagementModuleTestShim::nodeInfoCacheCapacityForTest();
    uint8_t k[32];
    memset(k, 0x11, sizeof(k));
    for (uint32_t i = 0; i < cap; i++)
        module.onNodeKeyCommitted(kFillBase + i, k, false);

    // Hook inserts for one more member: skipped rather than evicting an existing member.
    uint8_t extraKey[32];
    memset(extraKey, 0x22, sizeof(extraKey));
    module.onNodeKeyCommitted(kExtra, extraKey, false);
    uint8_t key[32] = {0};
    TEST_ASSERT_FALSE(module.copyPublicKey(kExtra, key, nullptr));
    module.onNodeIdentityCommitted(kExtra, makeCommittedUser("extra", 0x22), false);
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kExtra, out, nullptr));

    // The packet path may churn a member: the observed stranger lands (in the first-scanned
    // member's slot) and is correctly NOT marked a member itself.
    module.handleReceived(makeNodeInfoPacketWithKey(kObserved, "observed", 0x33));
    TEST_ASSERT_TRUE(module.copyPublicKey(kObserved, key, nullptr));
    const int flags = module.peekNodeInfoFlagsForTest(kObserved);
    TEST_ASSERT_TRUE(flags >= 0);
    TEST_ASSERT_TRUE(flags & kFlagObserved);
    TEST_ASSERT_FALSE(flags & kFlagMember);
    TEST_ASSERT_FALSE(module.copyPublicKey(kFillBase + 0, key, nullptr)); // the evicted member
}

/**
 * Full DB reset: NodeDB::resetNodes() purges this module's caches through purgeAll(), so no
 * identity, key, or next-hop hint survives a user-initiated "forget everything".
 */
static void test_tm_nodeinfo_resetNodes_purgesAllCaches(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();
    mockNodeDB->rollHotStore();

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    trafficManagementModule = &module; // the NodeDB purge hook reaches the module via the global

    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "victim", 0x37));
    module.setNextHop(kTargetNode, 0x42);
    uint8_t key[32] = {0};
    TEST_ASSERT_TRUE(module.copyPublicKey(kTargetNode, key, nullptr));
    TEST_ASSERT_EQUAL_UINT8(0x42, module.getNextHopHint(kTargetNode));

    mockNodeDB->resetNodes();

    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, key, nullptr));
    meshtastic_User out = meshtastic_User_init_zero;
    TEST_ASSERT_FALSE(module.copyUser(kTargetNode, out, nullptr));
    TEST_ASSERT_EQUAL_INT(-1, module.peekNodeInfoFlagsForTest(kTargetNode));
    TEST_ASSERT_EQUAL_UINT8(0, module.getNextHopHint(kTargetNode));
    // trafficManagementModule is reset in tearDown().
}

/**
 * A NodeInfo advertising OUR OWN public key is impersonating us and must never be cached
 * (mirrors NodeDB::updateUser()'s key hygiene for the store that feeds spoofed replies).
 */
static void test_tm_nodeinfo_cache_dropsFrameCarryingOwnerKey(void)
{
    mockNodeDB->clearCachedNode();
    TrafficManagementModuleTestShim module;

    owner.public_key.size = 32;
    memset(owner.public_key.bytes, 0x42, 32);

    module.handleReceived(makeNodeInfoPacketWithKey(kTargetNode, "imposter", 0x42));

    TEST_ASSERT_EQUAL_INT(-1, module.peekNodeInfoFlagsForTest(kTargetNode));
    uint8_t key[32] = {0};
    TEST_ASSERT_FALSE(module.copyPublicKey(kTargetNode, key, nullptr));
    // owner.public_key is reset in tearDown() (guaranteed even if an assertion above aborts).
}
#endif // !MESHTASTIC_EXCLUDE_PKI
#endif

/**
 * Verify the NodeDB-fallback direct-response path (no NodeInfo cache) refuses to spoof a
 * reply for a node NodeDB last heard beyond the serve window, but still answers a fresh one.
 */
static void test_tm_nodeinfo_directResponse_fallbackStaleEntryNotServed(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;

    // Drive getTime() to a known uptime so sinceLastSeen() is deterministic.
    setBootRelativeTimeForUnitTest(1000000);
    const uint32_t now = getTime();

    mockNodeDB->setCachedNode(kTargetNode);
    mockNodeDB->cachedNodeForTest().last_heard = now - (7UL * 60UL * 60UL); // 7 h ago -> stale
    // Signer-proven so staleness is the sole reason this is not served (isolates the gate under test).
    mockNodeDB->cachedNodeForTest().bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    resetRTCStateForTests();
}

/**
 * Verify the NodeDB-fallback path still answers when the node was heard recently.
 */
static void test_tm_nodeinfo_directResponse_fallbackFreshEntryServed(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;

    setBootRelativeTimeForUnitTest(1000000);
    const uint32_t now = getTime();

    mockNodeDB->setCachedNode(kTargetNode);
    mockNodeDB->cachedNodeForTest().last_heard = now - 60UL; // 1 min ago -> fresh
    // Signed-only replay gate (default) requires the target be a known signer to be served.
    mockNodeDB->cachedNodeForTest().bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(1, stats.nodeinfo_cache_hits);
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    resetRTCStateForTests();
}

/**
 * Per-target direct-response throttle on the NodeDB-fallback path (no PSRAM NodeInfo cache). The
 * per-target RAM table is not the cache, so it throttles this path identically: a burst for a fresh
 * node yields one spoofed reply per 60 s window, even from a different requester, then serves again.
 */
static void test_tm_nodeinfo_directResponse_fallbackThrottlesWithinWindow(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;

    setBootRelativeTimeForUnitTest(1000000);
    const uint32_t now = getTime();
    TrafficManagementModule::s_testNowMs = 3600000; // known base for the throttle windows

    mockNodeDB->setCachedNode(kTargetNode);
    mockNodeDB->cachedNodeForTest().last_heard = now - 60UL; // fresh, passes staleness gate
    // Signed-only replay gate (default) requires the target be a known signer to be served.
    mockNodeDB->cachedNodeForTest().bitfield |= NODEINFO_BITFIELD_HAS_XEDDSA_SIGNED_MASK;

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    // First request: served from the NodeDB fallback.
    request.id = 0xBBBB0001;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // Second request within the window, from a DIFFERENT requester so only the per-target axis can
    // throttle it: our spoofed TX is suppressed, but the request is NOT consumed - it CONTINUEs so
    // the genuine target (or another cache-holder) can answer.
    TrafficManagementModule::s_testNowMs += 5000; // 5 s < 60 s window
    request.from = kRemoteNode2;
    request.id = 0xBBBB0002;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_FALSE(module.ignoreRequestFlag());
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // Past the per-target window: served again. Back to the original requester (its 60 s per-requester
    // window from the first reply has also elapsed), so only the per-target release is under test.
    TrafficManagementModule::s_testNowMs += 60000; // now > 60 s since first reply
    request.from = kRemoteNode;
    request.id = 0xBBBB0003;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(2, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    resetRTCStateForTests();
}

/**
 * The per-requester and global-floor axes, isolated from per-target (which has its own cache/fallback
 * tests). Both bound spoofed direct replies by the unauthenticated requester address and by total
 * airtime; each step keeps the per-target axis fresh (distinct targets) so only the axis under test
 * gates the reply:
 *   - the same requester asking for a DIFFERENT target within 60 s is still throttled (the
 *     reflector-flood case: the per-target axis alone would not bound this);
 *   - a fresh requester is served, but only once the 1 s global floor has passed;
 *   - after the per-requester window elapses, the original requester is served again.
 */
static void test_tm_nodeinfo_directResponse_perRequesterAndGlobalFloor(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    mockNodeDB->clearCachedNode();

    const uint32_t base = 3600000;
    TrafficManagementModule::s_testNowMs = base;

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;

    // Three distinct, freshly-observed, signer-proven targets. Using a fresh target on each step keeps
    // the per-target axis from ever being the bound here, so the reply is gated only by the axis under
    // test: per-requester (step 2) or the global floor (step 4).
    constexpr NodeNum kTargetA = 0x33330001, kTargetB = 0x33330002, kTargetC = 0x33330003;
    constexpr NodeNum kRemoteNode3 = 0x66666666;
    for (NodeNum t : {kTargetA, kTargetB, kTargetC}) {
        module.handleReceived(makeNodeInfoPacket(t, "target-long", "tg"));
        module.markKeySignerProvenForTest(t);
    }

    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetA);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    // First reply for this requester: served.
    request.id = 0xC0DE0001;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // Same requester, DIFFERENT target, 10 s later: the per-target throttle can't fire (fresh entry),
    // but the per-requester window (60 s) still suppresses our TX. Forwarded, not sent.
    TrafficManagementModule::s_testNowMs = base + 10000;
    request.to = kTargetB;
    request.id = 0xC0DE0002;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(1, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // A DIFFERENT requester (fresh slot) is served - the 1 s global floor has long passed.
    request.from = kRemoteNode2;
    request.id = 0xC0DE0003;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(2, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // Yet a third fresh requester in the SAME instant, for a fresh target (so per-target can't be the
    // cause), is deferred by the 1 s global airtime floor. Forwarded, not sent.
    request.from = kRemoteNode3;
    request.to = kTargetC;
    request.id = 0xC0DE0004;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(2, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    // After the per-requester window elapses, the original requester is served again.
    TrafficManagementModule::s_testNowMs = base + 70000;
    request.from = kRemoteNode;
    request.to = kTargetA;
    request.id = 0xC0DE0005;
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(module.handleReceived(request)));
    TEST_ASSERT_EQUAL_UINT32(3, static_cast<uint32_t>(mockRouter.sentPackets.size()));
}

#if TMM_NODEINFO_REPLAY_SIGNED_GATE
/**
 * Replay gate (fallback path): a fresh NodeDB node that is NOT a known signer is withheld -
 * the courtesy reply is suppressed and the genuine request propagates (CONTINUE, no TX).
 */
static void test_tm_nodeinfo_directResponse_fallbackUnsignedNotServed(void)
{
    moduleConfig.traffic_management.nodeinfo_direct_response_max_hops = 10;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    setBootRelativeTimeForUnitTest(1000000);
    const uint32_t now = getTime();

    mockNodeDB->setCachedNode(kTargetNode);
    mockNodeDB->cachedNodeForTest().last_heard = now - 60UL; // fresh, passes staleness
    // Deliberately NOT flagged as a signer -> the signed-only gate must withhold the reply.

    MockRouter mockRouter;
    mockRouter.addInterface(std::unique_ptr<RadioInterface>(new MockRadioInterface()));
    MeshService mockService;
    router = &mockRouter;
    service = &mockService;

    TrafficManagementModuleTestShim module;
    module.dropNodeInfoCacheForTest(); // exercise the NodeDB fallback path
    meshtastic_MeshPacket request = makeDecodedPacket(meshtastic_PortNum_NODEINFO_APP, kRemoteNode, kTargetNode);
    request.decoded.want_response = true;
    request.hop_start = 3;
    request.hop_limit = 3;

    ProcessMessage result = module.handleReceived(request);
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_EQUAL_UINT32(0, static_cast<uint32_t>(mockRouter.sentPackets.size()));

    resetRTCStateForTests();
}
#endif // TMM_NODEINFO_REPLAY_SIGNED_GATE

/**
 * Verify relayed telemetry broadcasts are NOT hop-exhausted.
 * exhaust_hop_telemetry / exhaust_hop_position have been removed from the config
 * as "not suitable right now" - alterReceived must leave hop_limit unchanged.
 */
static void test_tm_alterReceived_telemetryBroadcast_hopLimitUnchanged(void)
{
    ScopedBusyAirTime busyChannel; // congestion present but exhaust is disabled
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode, NODENUM_BROADCAST);
    packet.hop_start = 5;
    packet.hop_limit = 3;

    module.alterReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_UINT8(3, packet.hop_limit); // unchanged
    TEST_ASSERT_EQUAL_UINT8(5, packet.hop_start); // unchanged
    TEST_ASSERT_FALSE(module.shouldExhaustHops(packet));
    TEST_ASSERT_EQUAL_UINT32(0, stats.hop_exhausted_packets);
}

/**
 * Verify alterReceived does not modify unicast or local-origin packets.
 * The precision clamp (the only active alterReceived path) only fires for
 * broadcast position packets from remote nodes - these should be untouched.
 */
static void test_tm_alterReceived_skipsLocalAndUnicast(void)
{
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket unicast = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode, kTargetNode);
    unicast.hop_start = 5;
    unicast.hop_limit = 3;
    module.alterReceived(unicast);
    TEST_ASSERT_EQUAL_UINT8(3, unicast.hop_limit);
    TEST_ASSERT_FALSE(module.shouldExhaustHops(unicast));

    meshtastic_MeshPacket fromUs = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kLocalNode, NODENUM_BROADCAST);
    fromUs.hop_start = 5;
    fromUs.hop_limit = 3;
    module.alterReceived(fromUs);
    TEST_ASSERT_EQUAL_UINT8(3, fromUs.hop_limit);
    TEST_ASSERT_FALSE(module.shouldExhaustHops(fromUs));

    meshtastic_TrafficManagementStats stats = module.getStats();
    TEST_ASSERT_EQUAL_UINT32(0, stats.hop_exhausted_packets);
}

/**
 * Verify position dedup window expires and later duplicates are allowed.
 * Important so periodic identical reports can resume after cooldown.
 */
static void test_tm_positionDedup_allowsDuplicateAfterIntervalExpires(void)
{
    // 360 s = 1 pos-tick (kPosTimeTickMs); advance the virtual clock past one tick period.
    moduleConfig.traffic_management.position_min_interval_secs = 360;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket second = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket third = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(second);
    TrafficManagementModule::s_testNowMs += 360001; // advance past one 6-min pos-tick (virtual clock)
    ProcessMessage r3 = module.handleReceived(third);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify interval=0 disables position deduplication.
 * Important because this is an explicit configuration escape hatch.
 */
static void test_tm_positionDedup_intervalZero_neverDrops(void)
{
    // position_min_interval_secs=0 disables the drop gate (shouldDropPosition returns false for any packet).
    moduleConfig.traffic_management.position_min_interval_secs = 0;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket second = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(second);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
}

/**
 * Verify precision values above 32 fall back to default precision.
 * Important so invalid config uses the documented default behavior.
 */
static void test_tm_positionDedup_precisionAbove32_usesDefaultPrecision(void)
{
    // Channel precision=99 is out of range; sanitizePositionPrecision falls back to default (19 bits).
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(99);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket second = makePositionPacket(kRemoteNode, 384221234, -1210845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(second);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
}

/**
 * Verify the dedup fingerprint does not collapse positions that are distinct at the
 * channel's *effective* precision. Dedup only runs on well-known (public) channels,
 * where precision is capped at MAX_POSITION_PRECISION_PUBLIC_KEY (15) regardless of the
 * channel's configured value - so the requested 32 is clamped to 15. Positions must
 * therefore differ in the top 15 bits (>= 2^17 raw units) to read as distinct; here
 * they differ by 2^18, well clear of the precision-15 grid, so neither is dropped.
 */
static void test_tm_positionDedup_distinctAtClampedChannelPrecision(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(32); // clamped to 15 on a public channel
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket second = makePositionPacket(kRemoteNode, 374221234 + (1 << 18), -1220845678 + (1 << 18));

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(second);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
}

/**
 * Verify channel precision=0 (no channel ceiling set) falls back to the firmware
 * default precision (19 bits / ~90 m cells). Positions more than one default grid
 * cell apart must remain distinct, not collapse into one fingerprint.
 */
static void test_tm_positionDedup_precisionZero_channelFallsBackToDefault(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    // precision=0 in the channel → getPositionPrecisionForChannel returns 0 → falls back to default 19 bits.
    installWellKnownPrimaryChannelWithPrecision(0);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket second = makePositionPacket(kRemoteNode, 384221234, -1210845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(second);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(0, stats.position_dedup_drops);
}

/**
 * Verify epoch reset invalidates stale position identity for dedup.
 * Important so reset paths cannot leak prior packet identity into new windows.
 */
static void test_tm_positionDedup_cacheFlush_doesNotDropFirstPacketAfterFlush(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterFlush = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket duplicate = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    module.flushCache();
    ProcessMessage r2 = module.handleReceived(afterFlush);
    ProcessMessage r3 = module.handleReceived(duplicate);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify non-position cache state does not make the first fingerprint-0 position look duplicated.
 * Important so unified cache entries from other features cannot leak into dedup decisions.
 */
static void test_tm_positionDedup_priorRateState_doesNotDropFirstFingerprintZero(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    moduleConfig.traffic_management.rate_limit_window_secs = 60;
    moduleConfig.traffic_management.rate_limit_max_packets = 10;
    installWellKnownPrimaryChannelWithPrecision(16);
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket telemetry = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode);
    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 0x12300000, 0x45600000);
    meshtastic_MeshPacket duplicate = makePositionPacket(kRemoteNode, 0x12300000, 0x45600000);

    ProcessMessage seeded = module.handleReceived(telemetry);
    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(duplicate);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(seeded));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify rate-limit counters reset after the window expires.
 * Important so temporary bursts do not cause persistent throttling.
 */
static void test_tm_rateLimit_resetsAfterWindowExpires(void)
{
    // 300 s = 1 rate-tick (kRateTimeTickMs); advance the virtual clock past one tick period.
    moduleConfig.traffic_management.rate_limit_window_secs = 300;
    moduleConfig.traffic_management.rate_limit_max_packets = 1;
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode);

    ProcessMessage r1 = module.handleReceived(packet);
    ProcessMessage r2 = module.handleReceived(packet);
    TrafficManagementModule::s_testNowMs += 300001; // advance past one 5-min rate-tick (virtual clock)
    ProcessMessage r3 = module.handleReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.rate_limit_drops);
}
/**
 * Verify unknown-packet tracking resets after its active window expires.
 * Important so old unknown traffic does not trigger delayed drops.
 */
static void test_tm_unknownPackets_resetAfterWindowExpires(void)
{
    moduleConfig.traffic_management.unknown_packet_threshold = 1;
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeUnknownPacket(kRemoteNode);

    ProcessMessage r1 = module.handleReceived(packet);
    ProcessMessage r2 = module.handleReceived(packet);
    TrafficManagementModule::s_testNowMs += 300001; // advance past 5 unknown-ticks (5 × 60s) (virtual clock)
    ProcessMessage r3 = module.handleReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.unknown_packet_drops);
}

/**
 * Verify unknown threshold values above the implementation cap (60) are clamped.
 * The counter is a 6-bit field (saturates at 63); threshold is capped at 60 so a
 * saturated reading always exceeds it. A config value of 300 should behave as 60.
 */
static void test_tm_unknownPackets_thresholdAbove255_clamps(void)
{
    moduleConfig.traffic_management.unknown_packet_threshold = 300;
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeUnknownPacket(kRemoteNode);

    for (int i = 0; i < 60; i++) {
        ProcessMessage result = module.handleReceived(packet);
        TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    }
    ProcessMessage dropped = module.handleReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(dropped));
    TEST_ASSERT_EQUAL_UINT32(1, stats.unknown_packet_drops);
}

/**
 * Verify relayed position broadcasts are NOT hop-exhausted.
 * exhaust_hop_position has been removed - alterReceived must leave hop_limit unchanged.
 */
static void test_tm_alterReceived_positionBroadcast_hopLimitUnchanged(void)
{
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makePositionPacket(kRemoteNode, 374221234, -1220845678, NODENUM_BROADCAST);
    packet.hop_start = 5;
    packet.hop_limit = 2;

    module.alterReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_UINT8(2, packet.hop_limit); // unchanged
    TEST_ASSERT_EQUAL_UINT8(5, packet.hop_start); // unchanged
    TEST_ASSERT_FALSE(module.shouldExhaustHops(packet));
    TEST_ASSERT_EQUAL_UINT32(0, stats.hop_exhausted_packets);
}
/**
 * Verify alterReceived ignores undecoded/encrypted packets.
 * Important so we never mutate packets that were not decoded by this module.
 */
static void test_tm_alterReceived_skipsUndecodedPackets(void)
{
    TrafficManagementModuleTestShim module;
    meshtastic_MeshPacket packet = makeUnknownPacket(kRemoteNode, NODENUM_BROADCAST);
    packet.hop_start = 5;
    packet.hop_limit = 3;

    module.alterReceived(packet);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_UINT8(5, packet.hop_start);
    TEST_ASSERT_EQUAL_UINT8(3, packet.hop_limit);
    TEST_ASSERT_FALSE(module.shouldExhaustHops(packet));
    TEST_ASSERT_EQUAL_UINT32(0, stats.hop_exhausted_packets);
}

/**
 * Verify shouldExhaustHops() always returns false - exhaust_hop_* features are
 * removed, so the exhaustRequested flag is never set.
 * Guards against accidental re-enablement without updating the flag logic.
 */
static void test_tm_alterReceived_exhaustFlagAlwaysFalse(void)
{
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket telemetry = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode, NODENUM_BROADCAST);
    telemetry.hop_start = 5;
    telemetry.hop_limit = 3;
    module.alterReceived(telemetry);
    TEST_ASSERT_FALSE(module.shouldExhaustHops(telemetry));

    meshtastic_MeshPacket text = makeDecodedPacket(meshtastic_PortNum_TEXT_MESSAGE_APP, kRemoteNode);
    ProcessMessage result = module.handleReceived(text);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(result));
    TEST_ASSERT_FALSE(module.shouldExhaustHops(telemetry));
    TEST_ASSERT_EQUAL_UINT32(0, stats.hop_exhausted_packets);
}

/**
 * Verify shouldExhaustHops() returns false for any packet regardless of from/id.
 * Since exhaust is removed, the from+id scope check is moot - this guards that
 * the always-false invariant holds across multiple distinct packets.
 */
static void test_tm_alterReceived_exhaustFlag_isPacketScoped(void)
{
    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket p1 = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kRemoteNode, NODENUM_BROADCAST);
    p1.id = 0x1010;
    p1.hop_start = 5;
    p1.hop_limit = 3;
    module.alterReceived(p1);

    meshtastic_MeshPacket p2 = makeDecodedPacket(meshtastic_PortNum_TELEMETRY_APP, kTargetNode, NODENUM_BROADCAST);
    p2.id = 0x2020;
    p2.hop_start = 4;
    p2.hop_limit = 0;

    TEST_ASSERT_FALSE(module.shouldExhaustHops(p1));
    TEST_ASSERT_FALSE(module.shouldExhaustHops(p2));
}

/**
 * Verify runOnce() returns sleep-forever interval when has_traffic_management is false.
 * TMM has no runtime enable flag - the presence bit is the only runtime gate.
 */
static void test_tm_runOnce_disabledReturnsMaxInterval(void)
{
    moduleConfig.has_traffic_management = false;
    TrafficManagementModuleTestShim module;

    int32_t interval = module.runOnce();

    TEST_ASSERT_EQUAL_INT32(INT32_MAX, interval);
}

/**
 * Verify runOnce() returns the maintenance cadence when enabled.
 * Important so periodic cache housekeeping continues at expected interval.
 */
static void test_tm_runOnce_enabledReturnsMaintenanceInterval(void)
{
    TrafficManagementModuleTestShim module;

    int32_t interval = module.runOnce();

    TEST_ASSERT_EQUAL_INT32(60 * 1000, interval);
}

// ---------------------------------------------------------------------------
// Next-hop overflow cache
// ---------------------------------------------------------------------------

/**
 * Round-trip set/get of a confirmed next hop, plus the input guards.
 */
static void test_tm_nextHop_setAndGetRoundTrip(void)
{
    TrafficManagementModuleTestShim module;

    // Unknown node yields no hint.
    TEST_ASSERT_EQUAL_UINT8(0, module.getNextHopHint(kTargetNode));

    // Store a confirmed hop and read it back.
    module.setNextHop(kTargetNode, 0x42);
    TEST_ASSERT_EQUAL_UINT8(0x42, module.getNextHopHint(kTargetNode));

    // Zero dest and zero byte are rejected (no spurious entry created).
    module.setNextHop(0, 0x42);
    module.setNextHop(kRemoteNode, 0);
    TEST_ASSERT_EQUAL_UINT8(0, module.getNextHopHint(kRemoteNode));

    // Last-write-wins on re-confirmation.
    module.setNextHop(kTargetNode, 0x99);
    TEST_ASSERT_EQUAL_UINT8(0x99, module.getNextHopHint(kTargetNode));
}

/**
 * The headline scenario: a node carrying a next hop in the hot NodeInfoLite DB
 * is warm-loaded into the TMM cache, then the hot DB is "rolled" (the node ages
 * out entirely). The hint must still be served - now exclusively from TMM.
 */
static void test_tm_nextHop_servedAfterNodeDbRoll(void)
{
    TrafficManagementModuleTestShim module;

    // Seed the hot NodeInfoLite DB with a node that has a confirmed next hop.
    mockNodeDB->setHotNode(kTargetNode, 0x42);

    // Warm-start the overflow cache from the hot DB.
    module.preloadNextHopsFromNodeDB();
    TEST_ASSERT_EQUAL_UINT8(0x42, module.getNextHopHint(kTargetNode));

    // Roll the main NodeInfoLite DB: the node is evicted from the hot store.
    mockNodeDB->rollHotStore();
    TEST_ASSERT_NULL(nodeDB->getMeshNode(kTargetNode)); // gone from the hot store

    // Hit is still served - proving it now comes from the TMM overflow cache.
    TEST_ASSERT_EQUAL_UINT8(0x42, module.getNextHopHint(kTargetNode));
}

/**
 * Preload must not clobber a freshly-learned (confirmed) hop with a possibly
 * stale persisted one from NodeInfoLite.
 */
static void test_tm_nextHop_preloadDoesNotClobberLearned(void)
{
    TrafficManagementModuleTestShim module;

    // A fresher confirmed hop is already cached.
    module.setNextHop(kTargetNode, 0x99);

    // The hot DB carries an older next hop for the same node.
    mockNodeDB->setHotNode(kTargetNode, 0x42);

    module.preloadNextHopsFromNodeDB();

    // The freshly-learned hop survives.
    TEST_ASSERT_EQUAL_UINT8(0x99, module.getNextHopHint(kTargetNode));
}

/**
 * A pure routing hint (no dedup/rate/unknown state) must survive the maintenance
 * sweep - next_hop != 0 keeps the slot alive even though it has no TTL.
 */
static void test_tm_nextHop_keptAliveAcrossMaintenanceSweep(void)
{
    TrafficManagementModuleTestShim module;

    module.setNextHop(kTargetNode, 0x42);

    // The sweep frees slots whose sub-stores are all empty; next_hop must veto that.
    module.runOnce();

    TEST_ASSERT_EQUAL_UINT8(0x42, module.getNextHopHint(kTargetNode));
}

// ---------------------------------------------------------------------------
// Role exceptions: TRACKER and LOST_AND_FOUND
// ---------------------------------------------------------------------------

/**
 * Verify TRACKER role caps the dedup window at 1 hour.
 * A duplicate position that would normally be blocked for 11 h (default) must
 * be forwarded once the 1-hour tracker cap expires.
 */
static void test_tm_trackerRole_capsDedupWindowAtOneHour(void)
{
    // Operator interval is 11 h - longer than the tracker cap.
    moduleConfig.traffic_management.position_min_interval_secs = default_traffic_mgmt_position_min_interval_secs;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TRACKER);

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterCap = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(dup); // still within 1-hour cap
    // Advance past 1 hour (tracker cap = 3600 s; pos-tick = 360 s → 10 ticks).
    TrafficManagementModule::s_testNowMs += (default_traffic_mgmt_tracker_position_min_interval_secs * 1000UL) + 1;
    ProcessMessage r3 = module.handleReceived(afterCap);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify TAK_TRACKER role receives the same 1-hour dedup cap as TRACKER.
 * Both roles share the same exception branch; this guards against future divergence.
 */
static void test_tm_takTrackerRole_capsDedupWindowAtOneHour(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = default_traffic_mgmt_position_min_interval_secs;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TAK_TRACKER);

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterCap = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(dup);
    TrafficManagementModule::s_testNowMs += (default_traffic_mgmt_tracker_position_min_interval_secs * 1000UL) + 1;
    ProcessMessage r3 = module.handleReceived(afterCap);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify the tracker role exception survives the node being evicted from BOTH the
 * hot and warm NodeDB stores - the TMM unified cache is the third fallback. The
 * role is cached on the entry while NodeDB still knows the node; once NodeDB
 * forgets it (getNodeRole → CLIENT), the cached role must keep the 1-hour cap
 * applied instead of reverting to the 11-hour default interval.
 */
static void test_tm_trackerRole_survivesNodeDbEvictionViaCachedRole(void)
{
    // Operator interval is 11 h - longer than the tracker cap.
    moduleConfig.traffic_management.position_min_interval_secs = default_traffic_mgmt_position_min_interval_secs;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TRACKER);

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterCap = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    // First packet: NodeDB knows the role; it is cached onto the TMM entry.
    ProcessMessage r1 = module.handleReceived(first);

    // Node ages out of NodeDB entirely (hot + warm). getNodeRole now returns CLIENT.
    mockNodeDB->clearCachedNode();

    ProcessMessage r2 = module.handleReceived(dup); // within 1-hour cap - still drop
    // Advance past the tracker cap (3600 s) but stay well under the 11-hour default.
    // Without the cached-role fallback this would still be inside the 11-hour window
    // (CLIENT → no exception) and wrongly drop; with it, the 1-hour cap lets it pass.
    TrafficManagementModule::s_testNowMs += (default_traffic_mgmt_tracker_position_min_interval_secs * 1000UL) + 1;
    ProcessMessage r3 = module.handleReceived(afterCap);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify a role change observed via NodeInfo updates the cached role (write-time update),
 * so an exception is dropped when a node is demoted from TRACKER back to CLIENT. The role
 * is read from the NodeInfo's User payload - the same event that updates NodeDB - not by
 * re-scanning NodeDB on the position path.
 */
static void test_tm_roleChange_viaNodeInfo_dropsTrackerException(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = default_traffic_mgmt_position_min_interval_secs;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TRACKER);

    TrafficManagementModuleTestShim module;

    // First position seeds the TMM entry with TRACKER (from NodeDB on isNew).
    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    ProcessMessage r1 = module.handleReceived(first);

    // The node demotes to CLIENT and announces it. The NodeInfo refresh must overwrite
    // the cached TRACKER role with CLIENT - even though the packet payload, not NodeDB,
    // is the source of truth here (NodeDB role left stale on purpose to prove the path).
    meshtastic_MeshPacket info = makeNodeInfoPacketWithRole(kRemoteNode, meshtastic_Config_DeviceConfig_Role_CLIENT);
    module.handleReceived(info);

    // Past the 1-hour tracker cap but within the 11-hour CLIENT interval. With the stale
    // TRACKER role this would pass; after the demotion it must drop (full interval applies).
    TrafficManagementModule::s_testNowMs += (default_traffic_mgmt_tracker_position_min_interval_secs * 1000UL) + 1;
    meshtastic_MeshPacket afterCap = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    ProcessMessage r2 = module.handleReceived(afterCap);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify a cached special (non-CLIENT) role pins the TMM entry through the maintenance
 * sweep: once the node's position state has expired and been cleared, the entry - and its
 * role - must still survive (role has no TTL), the same way a confirmed next-hop hint does.
 */
static void test_tm_specialRole_pinsEntryThroughSweep(void)
{
    // Short position interval → short pos TTL so the sweep clears pos state quickly.
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TRACKER);

    TrafficManagementModuleTestShim module;

    module.handleReceived(makePositionPacket(kRemoteNode, 374221234, -1220845678));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(meshtastic_Config_DeviceConfig_Role_TRACKER), module.peekCachedRole(kRemoteNode));

    // Advance well past the position TTL, then sweep: pos state is cleared but the role
    // (no TTL) must keep the entry alive. Without the role pin the entry would be reclaimed
    // and peekCachedRole would return -1.
    TrafficManagementModule::s_testNowMs += 60UL * 60UL * 1000UL; // 1 h
    module.runOnce();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(meshtastic_Config_DeviceConfig_Role_TRACKER), module.peekCachedRole(kRemoteNode));
}

/**
 * Verify special-role entries are evicted last. A tracker that is the OLDEST entry must
 * survive cache pressure that evicts many newer CLIENT entries, because a cached
 * special role marks the entry "preferred" (like a next-hop hint) in victim selection.
 */
static void test_tm_specialRole_evictedLastUnderPressure(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);

    TrafficManagementModuleTestShim module;

    // Oldest entry: a tracker. Seed its role from NodeDB on first position.
    const NodeNum tracker = 0xAA0000FF;
    mockNodeDB->setCachedNode(tracker);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TRACKER);
    module.handleReceived(makePositionPacket(tracker, 100, 200));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(meshtastic_Config_DeviceConfig_Role_TRACKER), module.peekCachedRole(tracker));

    mockNodeDB->clearCachedNode(); // every subsequent filler resolves to CLIENT (unprotected)

    // Fill past capacity with newer CLIENT nodes, forcing many evictions. The tracker is
    // the stalest entry but is "preferred", so an unprotected client must always be the
    // victim instead - the tracker must never be evicted.
    for (uint32_t i = 0; i < static_cast<uint32_t>(TRAFFIC_MANAGEMENT_CACHE_SIZE) + 50; i++) {
        const NodeNum filler = 0x01000000u + i;
        module.handleReceived(makePositionPacket(filler, 300 + static_cast<int>(i), 400 + static_cast<int>(i)));
    }

    TEST_ASSERT_EQUAL_INT(static_cast<int>(meshtastic_Config_DeviceConfig_Role_TRACKER), module.peekCachedRole(tracker));
}

/**
 * Verify the tracker cap never lengthens an operator-configured interval shorter
 * than the cap default. The cap is a ceiling, not a floor.
 */
static void test_tm_trackerRole_doesNotLengthenShorterOperatorInterval(void)
{
    // Operator set 5-minute interval - shorter than the 1-hour tracker cap.
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_TRACKER);

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterShortInterval = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(dup);
    // The 300 s operator interval rounds to 1 pos-tick (360 s) - dedup is tick-granular.
    // Advance past one full tick to verify the window is 1 tick (not the 10-tick tracker cap).
    TrafficManagementModule::s_testNowMs += 360'000UL + 1;
    ProcessMessage r3 = module.handleReceived(afterShortInterval);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify LOST_AND_FOUND role caps duplicate-position dedup at ~15 min (2 pos-ticks),
 * not the old one-tick fast-announce. A configured 11-hour interval is shortened to the
 * 15-min cap; a duplicate one tick later still drops, but one past the 2-tick cap passes.
 */
static void test_tm_lostAndFoundRole_capsDedupAtFifteenMinutes(void)
{
    // Long interval that would normally suppress duplicates for 11 h.
    moduleConfig.traffic_management.position_min_interval_secs = default_traffic_mgmt_position_min_interval_secs;
    installWellKnownPrimaryChannelWithPrecision(16);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_LOST_AND_FOUND);

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterOneTick = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterCap = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(dup); // same tick - drop
    // One pos-tick later: STILL within the 15-min (~2-tick) cap, unlike the old 1-tick exception.
    // (360 s = kPosTimeTickMs, kept as a literal because the constant is private to the module.)
    TrafficManagementModule::s_testNowMs += 360'000UL + 1;
    ProcessMessage r3 = module.handleReceived(afterOneTick); // still drop
    // Jump past the full cap (>= 2 ticks since the last packet): now it passes.
    TrafficManagementModule::s_testNowMs += 2 * 360'000UL;
    ProcessMessage r4 = module.handleReceived(afterCap);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r4));
    TEST_ASSERT_EQUAL_UINT32(2, stats.position_dedup_drops);
}

/**
 * Verify a node with unknown role (absent from NodeDB) is not granted any role
 * exception: the full configured interval applies, so a duplicate inside that
 * window is dropped exactly as for an ordinary CLIENT.
 */
static void test_tm_unknownRole_noDbEntry_appliesFullInterval(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);

    // No cached node - getMeshNode returns nullptr for kRemoteNode.
    mockNodeDB->clearCachedNode();

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket afterShort = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(dup); // within 300-s window - must drop
    // The 300 s operator interval rounds to 1 pos-tick (360 s) - dedup is tick-granular.
    // Advance past one full tick to confirm the packet passes without any tracker exception.
    TrafficManagementModule::s_testNowMs += 360'000UL + 1;
    ProcessMessage r3 = module.handleReceived(afterShort);
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r3));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify a node present in NodeDB but without user info (HAS_USER bit clear)
 * is not granted a role exception: it falls back to CLIENT and the full
 * configured interval applies.
 */
static void test_tm_unknownRole_noUserBit_appliesFullInterval(void)
{
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    installWellKnownPrimaryChannelWithPrecision(16);

    // Node is in NodeDB but the HAS_USER bit is NOT set - role must be ignored.
    mockNodeDB->setCachedNode(kRemoteNode);
    // Clear the HAS_USER bit that setCachedNode sets, leaving role at CLIENT default.
    mockNodeDB->cachedNodeForTest().bitfield &= ~NODEINFO_BITFIELD_HAS_USER_MASK;
    mockNodeDB->cachedNodeForTest().role = meshtastic_Config_DeviceConfig_Role_TRACKER;

    TrafficManagementModuleTestShim module;

    meshtastic_MeshPacket first = makePositionPacket(kRemoteNode, 374221234, -1220845678);
    meshtastic_MeshPacket dup = makePositionPacket(kRemoteNode, 374221234, -1220845678);

    ProcessMessage r1 = module.handleReceived(first);
    ProcessMessage r2 = module.handleReceived(dup); // within 300-s window - must drop
    meshtastic_TrafficManagementStats stats = module.getStats();

    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::CONTINUE), static_cast<int>(r1));
    TEST_ASSERT_EQUAL_INT(static_cast<int>(ProcessMessage::STOP), static_cast<int>(r2));
    TEST_ASSERT_EQUAL_UINT32(1, stats.position_dedup_drops);
}

/**
 * Verify a LOST_AND_FOUND origin now GETS the relayed precision clamp - the
 * anti-dox exemption was removed, so a relayed position more precise than the
 * channel setting is clamped down to the channel ceiling like any other node's.
 */
static void test_tm_lostAndFoundRole_getsAlterReceivedPrecisionClamp(void)
{
    // Set channel precision ceiling to 13 bits. Must be <= MAX_POSITION_PRECISION_PUBLIC_KEY
    // (15) - well-known channels have a public PSK (size==1), so getPositionPrecisionForChannel
    // clamps any value above 15 via usesPublicKey().
    installWellKnownPrimaryChannelWithPrecision(13);

    mockNodeDB->setCachedNode(kRemoteNode);
    mockNodeDB->setCachedNodeRole(meshtastic_Config_DeviceConfig_Role_LOST_AND_FOUND);

    TrafficManagementModuleTestShim module;

    // Full-precision packet - 32 bits - exceeds the channel cap.
    const uint32_t fullPrecision = 32;
    meshtastic_MeshPacket packet = makePositionPacketWithPrecision(kRemoteNode, 374221234, -1220845678, fullPrecision);
    packet.hop_start = 3;
    packet.hop_limit = 2; // relayed (hop_limit < hop_start) so clamp logic applies

    module.alterReceived(packet);

    meshtastic_Position out;
    TEST_ASSERT_TRUE(decodePositionPayload(packet, out));
    // Clamped to channel ceiling (13 bits) - lost-and-found is no longer exempt.
    // Note: precision must be <= MAX_POSITION_PRECISION_PUBLIC_KEY (15); well-known
    // channels always have a public PSK so getPositionPrecisionForChannel caps at 15.
    TEST_ASSERT_EQUAL_UINT32(13, out.precision_bits);
}

// ---------------------------------------------------------------------------
// Fuzz - crafted-nodenum blitz of the unified cache
// ---------------------------------------------------------------------------
// Floods handleReceived/alterReceived with crafted packets over a tiny node pool so the fixed-size
// cache churns hard while the virtual clock sweeps the rate/unknown/position windows; no crash, counters bounded.
static constexpr uint64_t FUZZ_SEED = 0x00D07E5701ULL;

static void test_tm_fuzz_nodenum_blitz(void)
{
    printf("  seed=0x%llx\n", (unsigned long long)FUZZ_SEED);
    rngSeed(FUZZ_SEED);

    // Activate the cache-tracked windows (the crafted-nodenum target). The nodeinfo direct-response
    // path (nodeinfo_direct_response_max_hops) is left OFF: it calls service->sendToMesh, and driving
    // that at fuzz volume needs a fully-wired MeshService/phone queue this fixture doesn't provide - the
    // deterministic test_tm_nodeinfo_directResponse_* tests cover it with single packets instead.
    moduleConfig.traffic_management.rate_limit_window_secs = 60;
    moduleConfig.traffic_management.rate_limit_max_packets = 3;
    moduleConfig.traffic_management.unknown_packet_threshold = 4;
    moduleConfig.traffic_management.position_min_interval_secs = 300;
    config.device.role = meshtastic_Config_DeviceConfig_Role_CLIENT;
    installWellKnownPrimaryChannel();

    static TrafficManagementModuleTestShim module; // static: OSThread-derived (see note in test_fuzz_packets E2)

    // Shared boundary pool (0/1/broadcast) plus this suite's well-known nodes.
    const NodeNum wellKnown[] = {kLocalNode, kRemoteNode, kTargetNode};
    const size_t wellKnownN = sizeof(wellKnown) / sizeof(wellKnown[0]);
    const meshtastic_PortNum ports[] = {
        meshtastic_PortNum_TEXT_MESSAGE_APP, meshtastic_PortNum_NODEINFO_APP, meshtastic_PortNum_POSITION_APP,
        meshtastic_PortNum_ROUTING_APP,      meshtastic_PortNum_ADMIN_APP,    meshtastic_PortNum_TELEMETRY_APP,
    };
    const size_t portsN = sizeof(ports) / sizeof(ports[0]);

    const unsigned ITERS = 30000;
    for (unsigned k = 0; k < ITERS; k++) {
        meshtastic_MeshPacket p = meshtastic_MeshPacket_init_zero;
        p.from = (rngRange(8) == 0) ? (NodeNum)rngNext() : rngEdgeNodeNum(wellKnown, wellKnownN);
        p.to = rngEdgeNodeNum(wellKnown, wellKnownN);
        p.id = rngNext();
        p.channel = 0;
        p.hop_start = (uint8_t)rngRange(8); // 0..7, wire-bounded
        p.hop_limit = (uint8_t)rngRange(8);
        p.decoded.want_response = (rngRange(2) == 0);

        if (rngRange(5) == 0) {
            // Undecoded / unknown packet - exercises the unknown-packet threshold path.
            p.which_payload_variant = meshtastic_MeshPacket_encrypted_tag;
            p.encrypted.size = rngRange(sizeof(p.encrypted.bytes) + 1);
            rngFill(p.encrypted.bytes, p.encrypted.size);
        } else {
            p.which_payload_variant = meshtastic_MeshPacket_decoded_tag;
            p.decoded.portnum = (rngRange(8) == 0) ? (meshtastic_PortNum)rngRange(80) : ports[rngRange(portsN)];
            p.decoded.has_bitfield = true;
            p.decoded.bitfield = (uint32_t)rngNext();
            if (p.decoded.portnum == meshtastic_PortNum_POSITION_APP && rngRange(2)) {
                meshtastic_Position pos = meshtastic_Position_init_zero;
                pos.has_latitude_i = true;
                pos.has_longitude_i = true;
                pos.latitude_i = (int32_t)rngNext();
                pos.longitude_i = (int32_t)rngNext();
                pos.precision_bits = rngRange(40); // includes >32 (the default-precision fallback)
                p.decoded.payload.size =
                    pb_encode_to_bytes(p.decoded.payload.bytes, sizeof(p.decoded.payload.bytes), &meshtastic_Position_msg, &pos);
            } else {
                // Random payload bytes: TMM's nested User/Position decode must fail cleanly.
                p.decoded.payload.size = rngRange(sizeof(p.decoded.payload.bytes) + 1);
                rngFill(p.decoded.payload.bytes, p.decoded.payload.size);
            }
        }

        (void)module.handleReceived(p);
        if (rngRange(3) == 0)
            module.alterReceived(p);

        // Advance the virtual clock so rate / unknown / position windows open and close under churn.
        if (rngRange(16) == 0)
            TrafficManagementModule::s_testNowMs += (rngRange(120) + 1) * 1000u;
        if (rngRange(1024) == 0)
            (void)module.runOnce(); // maintenance sweep: cache aging / eviction
    }

    // The cache never inspected more packets than we fed, and the run reached here without an ASan fault.
    TEST_ASSERT_TRUE_MESSAGE(module.getStats().packets_inspected <= ITERS, "packets_inspected overcounted");
}
} // namespace

void setUp(void)
{
    resetTrafficConfig();
}
void tearDown(void)
{
    // Runs even when a TEST_ASSERT_* aborts a test mid-way (Unity longjmps out, skipping any
    // cleanup the test itself does after the assertion), so per-test global state can never
    // dangle into later cases. The dangling-pointer path is concrete: a test points the global
    // at its stack `module`, and the next setUp()'s resetNodes() would then call
    // trafficManagementModule->purgeAll() on a destroyed object.
    trafficManagementModule = nullptr;
    owner.public_key.size = 0;
    memset(owner.public_key.bytes, 0, sizeof(owner.public_key.bytes));
    // Neutralize the RTC fake clock a fallback test may have set (the virtual s_testNowMs is
    // already reset by setUp via resetTrafficConfig).
    setBootRelativeTimeForUnitTest(0);
}

TM_TEST_ENTRY void setup()
{
    delay(10);
    delay(2000);

    initializeTestEnvironment();
    mockNodeDB = new MockNodeDB();
    nodeDB = mockNodeDB;

    UNITY_BEGIN();
    RUN_TEST(test_tm_moduleDisabled_doesNothing);
    RUN_TEST(test_tm_unknownPackets_dropOnNPlusOne);
    RUN_TEST(test_tm_positionDedup_dropsDuplicateWithinWindow);
    RUN_TEST(test_tm_positionDedup_allowsMovedPosition);
    RUN_TEST(test_tm_rateLimit_dropsOnlyAfterThreshold);
    RUN_TEST(test_tm_fromUs_bypassesPositionAndRateFilters);
    RUN_TEST(test_tm_localDestination_bypassesTransitFilters);
    RUN_TEST(test_tm_nodeinfo_routerClamp_skipsWhenTooManyHops);
    RUN_TEST(test_tm_nodeinfo_directResponse_respondsFromCache);
    RUN_TEST(test_tm_nodeinfo_directResponse_learnsRequestorNodeInfo);
    RUN_TEST(test_tm_nodeinfo_directResponse_ignoresUnsignedSignerIdentity);
    RUN_TEST(test_tm_nodeinfo_clientClamp_skipsWhenNotDirect);
    RUN_TEST(test_tm_nodeinfo_directResponse_withoutNodeDbEntry_skips);
    RUN_TEST(test_tm_nodeinfo_directResponse_fallbackStaleEntryNotServed);
    RUN_TEST(test_tm_nodeinfo_directResponse_fallbackFreshEntryServed);
    RUN_TEST(test_tm_nodeinfo_directResponse_fallbackThrottlesWithinWindow);
    RUN_TEST(test_tm_nodeinfo_directResponse_perRequesterAndGlobalFloor);
#if TMM_NODEINFO_REPLAY_SIGNED_GATE
    RUN_TEST(test_tm_nodeinfo_directResponse_fallbackUnsignedNotServed);
#endif
#if TMM_HAS_NODEINFO_CACHE
    RUN_TEST(test_tm_nodeinfo_directResponse_psramCacheRespondsAndPreservesBitfield);
    RUN_TEST(test_tm_nodeinfo_directResponse_psramMissDoesNotFallbackToNodeDb);
    RUN_TEST(test_tm_nodeinfo_directResponse_psramStaleEntryNotServed);
    RUN_TEST(test_tm_nodeinfo_directResponse_psramThrottlesWithinWindow);
#if !(MESHTASTIC_EXCLUDE_PKI)
    RUN_TEST(test_tm_nodeinfo_cache_rejectsMismatchedKey);
#if WARM_NODE_COUNT > 0
    RUN_TEST(test_tm_nodeinfo_cache_pinsAgainstWarmTierKey);
    RUN_TEST(test_tm_nodeinfo_gate_blocksUnsignedWarmSignerForgery);
    RUN_TEST(test_tm_nodeinfo_reconcile_seedsFromHotStoreButNeverServes);
    RUN_TEST(test_tm_nodeinfo_reconcile_seedsKeyOnlyFromWarmTier);
    RUN_TEST(test_tm_nodeinfo_reconcile_keepsTofuKeyOnKeylessHotIdentity);
    RUN_TEST(test_tm_nodeinfo_updateUserHook_writesThrough);
    RUN_TEST(test_tm_nodeinfo_removeNode_purgesCaches);
    RUN_TEST(test_tm_nodeinfo_noTimedEviction_quietKeyedEntrySurvives);
#endif
    RUN_TEST(test_tm_nodeinfo_copyPublicKey_servesTofuKey);
    RUN_TEST(test_tm_nodeinfo_copyPublicKey_upgradesToSignerProven);
    RUN_TEST(test_tm_nodeinfo_copyPublicKey_missReturnsFalse);
    RUN_TEST(test_tm_nodeinfo_copyUser_returnsCachedIdentity);
#if TMM_NODEINFO_REPLAY_SIGNED_GATE
    RUN_TEST(test_tm_nodeinfo_directResponse_psramUnsignedNotServed);
#endif
#endif
    RUN_TEST(test_tm_nodeinfo_keyHook_upsertsAndGovernsProvenance);
    RUN_TEST(test_tm_nodeinfo_tickSaturation_sweepClearsObserved);
    RUN_TEST(test_tm_nodeinfo_reconcileMembershipMarking);
    RUN_TEST(test_tm_nodeinfo_cache_normalizesSpoofedUserId);
    RUN_TEST(test_tm_nodeinfo_hooks_noopWhileModuleDisabled);
    RUN_TEST(test_tm_nodeinfo_identityHook_keySemantics);
    RUN_TEST(test_tm_nodeinfo_reads_gatedWhileModuleDisabled);
#if !(MESHTASTIC_EXCLUDE_PKI)
    RUN_TEST(test_tm_nodeinfo_eviction_keyedTiersOutrankKeyless);
    RUN_TEST(test_tm_nodeinfo_eviction_tofuLosesBeforeProvenAndMember);
    RUN_TEST(test_tm_nodeinfo_eviction_withinTierStalestLoses);
    RUN_TEST(test_tm_nodeinfo_memberSaturated_hooksSkipPacketPathEvicts);
    RUN_TEST(test_tm_nodeinfo_resetNodes_purgesAllCaches);
    RUN_TEST(test_tm_nodeinfo_cache_dropsFrameCarryingOwnerKey);
#endif
#endif
    RUN_TEST(test_tm_alterReceived_telemetryBroadcast_hopLimitUnchanged);
    RUN_TEST(test_tm_alterReceived_skipsLocalAndUnicast);
    RUN_TEST(test_tm_positionDedup_allowsDuplicateAfterIntervalExpires);
    RUN_TEST(test_tm_positionDedup_intervalZero_neverDrops);
    RUN_TEST(test_tm_positionDedup_precisionAbove32_usesDefaultPrecision);
    RUN_TEST(test_tm_positionDedup_distinctAtClampedChannelPrecision);
    RUN_TEST(test_tm_positionDedup_precisionZero_channelFallsBackToDefault);
    RUN_TEST(test_tm_positionDedup_cacheFlush_doesNotDropFirstPacketAfterFlush);
    RUN_TEST(test_tm_positionDedup_priorRateState_doesNotDropFirstFingerprintZero);
    RUN_TEST(test_tm_rateLimit_resetsAfterWindowExpires);
    RUN_TEST(test_tm_unknownPackets_resetAfterWindowExpires);
    RUN_TEST(test_tm_unknownPackets_thresholdAbove255_clamps);
    RUN_TEST(test_tm_alterReceived_positionBroadcast_hopLimitUnchanged);
    RUN_TEST(test_tm_alterReceived_skipsUndecodedPackets);
    RUN_TEST(test_tm_alterReceived_exhaustFlagAlwaysFalse);
    RUN_TEST(test_tm_alterReceived_exhaustFlag_isPacketScoped);
    RUN_TEST(test_tm_runOnce_disabledReturnsMaxInterval);
    RUN_TEST(test_tm_runOnce_enabledReturnsMaintenanceInterval);
    RUN_TEST(test_tm_nextHop_setAndGetRoundTrip);
    RUN_TEST(test_tm_nextHop_servedAfterNodeDbRoll);
    RUN_TEST(test_tm_nextHop_preloadDoesNotClobberLearned);
    RUN_TEST(test_tm_nextHop_keptAliveAcrossMaintenanceSweep);
    RUN_TEST(test_tm_trackerRole_capsDedupWindowAtOneHour);
    RUN_TEST(test_tm_takTrackerRole_capsDedupWindowAtOneHour);
    RUN_TEST(test_tm_trackerRole_survivesNodeDbEvictionViaCachedRole);
    RUN_TEST(test_tm_roleChange_viaNodeInfo_dropsTrackerException);
    RUN_TEST(test_tm_specialRole_pinsEntryThroughSweep);
    RUN_TEST(test_tm_specialRole_evictedLastUnderPressure);
    RUN_TEST(test_tm_trackerRole_doesNotLengthenShorterOperatorInterval);
    RUN_TEST(test_tm_lostAndFoundRole_capsDedupAtFifteenMinutes);
    RUN_TEST(test_tm_lostAndFoundRole_getsAlterReceivedPrecisionClamp);
    RUN_TEST(test_tm_unknownRole_noDbEntry_appliesFullInterval);
    RUN_TEST(test_tm_unknownRole_noUserBit_appliesFullInterval);
    RUN_TEST(test_tm_fuzz_nodenum_blitz);
    exit(UNITY_END());
}

TM_TEST_ENTRY void loop() {}

#else

void setUp(void) {}
void tearDown(void) {}

TM_TEST_ENTRY void setup()
{
    initializeTestEnvironment();
    UNITY_BEGIN();
    exit(UNITY_END());
}

TM_TEST_ENTRY void loop() {}

#endif