Initial NODENUM_BROADCAST_NO_LORA implementation with NeighborInfo module (#5087)

* Initial NODENUM_BROADCAST_NO_LORA implementation with NeighborInfo module

* isBroadcast

* Trunkt

src/mesh/FloodingRouter.cpp

@@ -44,7 +44,7 @@ bool FloodingRouter::isRebroadcaster()
 void FloodingRouter::sniffReceived(const meshtastic_MeshPacket *p, const meshtastic_Routing *c)
 {
     bool isAckorReply = (p->which_payload_variant == meshtastic_MeshPacket_decoded_tag) && (p->decoded.request_id != 0);
-    if (isAckorReply && !isToUs(p) && p->to != NODENUM_BROADCAST) {
+    if (isAckorReply && !isToUs(p) && !isBroadcast(p->to)) {
         // do not flood direct message that is ACKed or replied to
         LOG_DEBUG("Rxd an ACK/reply not for me, cancel rebroadcast.");
         Router::cancelSending(p->to, p->decoded.request_id); // cancel rebroadcast for this DM

src/mesh/MeshModule.cpp

@@ -86,7 +86,7 @@ void MeshModule::callModules(meshtastic_MeshPacket &mp, RxSource src)
 
     // Was this message directed to us specifically?  Will be false if we are sniffing someone elses packets
     auto ourNodeNum = nodeDB->getNodeNum();
-    bool toUs = mp.to == NODENUM_BROADCAST || isToUs(&mp);
+    bool toUs = isBroadcast(mp.to) || isToUs(&mp);
 
     for (auto i = modules->begin(); i != modules->end(); ++i) {
         auto &pi = **i;

src/mesh/MeshTypes.h

@@ -57,4 +57,6 @@ bool isFromUs(const meshtastic_MeshPacket *p);
 bool isToUs(const meshtastic_MeshPacket *p);
 
 /* Some clients might not properly set priority, therefore we fix it here. */
-void fixPriority(meshtastic_MeshPacket *p);
+void fixPriority(meshtastic_MeshPacket *p);
+
+bool isBroadcast(uint32_t dest);

src/mesh/NodeDB.cpp

@@ -222,6 +222,11 @@ bool isToUs(const meshtastic_MeshPacket *p)
     return p->to == nodeDB->getNodeNum();
 }
 
+bool isBroadcast(uint32_t dest)
+{
+    return dest == NODENUM_BROADCAST || dest == NODENUM_BROADCAST_NO_LORA;
+}
+
 bool NodeDB::resetRadioConfig(bool factory_reset)
 {
     bool didFactoryReset = false;

src/mesh/RadioLibInterface.cpp

@@ -467,7 +467,10 @@ void RadioLibInterface::setStandby()
 void RadioLibInterface::startSend(meshtastic_MeshPacket *txp)
 {
     printPacket("Starting low level send", txp);
-    if (disabled || !config.lora.tx_enabled) {
+    if (txp->to == NODENUM_BROADCAST_NO_LORA) {
+        LOG_DEBUG("Drop Tx packet because dest is broadcast no-lora");
+        packetPool.release(txp);
+    } else if (disabled || !config.lora.tx_enabled) {
         LOG_WARN("Drop Tx packet because LoRa Tx disabled");
         packetPool.release(txp);
     } else {

src/mesh/Router.cpp

@@ -181,7 +181,7 @@ ErrorCode Router::sendLocal(meshtastic_MeshPacket *p, RxSource src)
     } else {
         // If we are sending a broadcast, we also treat it as if we just received it ourself
         // this allows local apps (and PCs) to see broadcasts sourced locally
-        if (p->to == NODENUM_BROADCAST) {
+        if (isBroadcast(p->to)) {
             handleReceived(p, src);
         }
 
@@ -240,7 +240,7 @@ ErrorCode Router::send(meshtastic_MeshPacket *p)
     // assert
 
     // Never set the want_ack flag on broadcast packets sent over the air.
-    if (p->to == NODENUM_BROADCAST)
+    if (isBroadcast(p->to))
         p->want_ack = false;
 
     // Up until this point we might have been using 0 for the from address (if it started with the phone), but when we send over
@@ -328,7 +328,7 @@ bool perhapsDecode(meshtastic_MeshPacket *p)
     memcpy(ScratchEncrypted, p->encrypted.bytes, rawSize);
 #if !(MESHTASTIC_EXCLUDE_PKI)
     // Attempt PKI decryption first
-    if (p->channel == 0 && isToUs(p) && p->to > 0 && p->to != NODENUM_BROADCAST && nodeDB->getMeshNode(p->from) != nullptr &&
+    if (p->channel == 0 && isToUs(p) && p->to > 0 && !isBroadcast(p->to) && nodeDB->getMeshNode(p->from) != nullptr &&
         nodeDB->getMeshNode(p->from)->user.public_key.size > 0 && nodeDB->getMeshNode(p->to)->user.public_key.size > 0 &&
         rawSize > MESHTASTIC_PKC_OVERHEAD) {
         LOG_DEBUG("Attempting PKI decryption");
@@ -493,7 +493,7 @@ meshtastic_Routing_Error perhapsEncode(meshtastic_MeshPacket *p)
             // Don't use PKC if it's not explicitly requested and a non-primary channel is requested
             !(p->pki_encrypted != true && p->channel > 0) &&
             // Check for valid keys and single node destination
-            config.security.private_key.size == 32 && p->to != NODENUM_BROADCAST && node != nullptr &&
+            config.security.private_key.size == 32 && !isBroadcast(p->to) && node != nullptr &&
             // Check for a known public key for the destination
             (node->user.public_key.size == 32) &&
             // Some portnums either make no sense to send with PKC
@@ -615,7 +615,7 @@ void Router::handleReceived(meshtastic_MeshPacket *p, RxSource src)
 #if !MESHTASTIC_EXCLUDE_MQTT
         // Mark as pki_encrypted if it is not yet decoded and MQTT encryption is also enabled, hash matches and it's a DM not to
         // us (because we would be able to decrypt it)
-        if (!decoded && moduleConfig.mqtt.encryption_enabled && p->channel == 0x00 && p->to != NODENUM_BROADCAST && !isToUs(p))
+        if (!decoded && moduleConfig.mqtt.encryption_enabled && p->channel == 0x00 && !isBroadcast(p->to) && !isToUs(p))
             p_encrypted->pki_encrypted = true;
         // After potentially altering it, publish received message to MQTT if we're not the original transmitter of the packet
         if ((decoded || p_encrypted->pki_encrypted) && moduleConfig.mqtt.enabled && !isFromUs(p) && mqtt)

src/modules/NeighborInfoModule.cpp

@@ -122,7 +122,7 @@ Will be used for broadcast.
 int32_t NeighborInfoModule::runOnce()
 {
     if (airTime->isTxAllowedChannelUtil(true) && airTime->isTxAllowedAirUtil()) {
-        sendNeighborInfo(NODENUM_BROADCAST, false);
+        sendNeighborInfo(NODENUM_BROADCAST_NO_LORA, false);
     }
     return Default::getConfiguredOrDefaultMs(moduleConfig.neighbor_info.update_interval, default_neighbor_info_broadcast_secs);
 }

src/modules/NodeInfoModule.cpp

@@ -16,7 +16,7 @@ bool NodeInfoModule::handleReceivedProtobuf(const meshtastic_MeshPacket &mp, mes
 
     bool hasChanged = nodeDB->updateUser(getFrom(&mp), p, mp.channel);
 
-    bool wasBroadcast = mp.to == NODENUM_BROADCAST;
+    bool wasBroadcast = isBroadcast(mp.to);
 
     // Show new nodes on LCD screen
     if (wasBroadcast) {

src/modules/RoutingModule.cpp

@@ -13,8 +13,7 @@ bool RoutingModule::handleReceivedProtobuf(const meshtastic_MeshPacket &mp, mesh
     printPacket("Routing sniffing", &mp);
     router->sniffReceived(&mp, r);
 
-    bool maybePKI =
+    bool maybePKI = mp.which_payload_variant == meshtastic_MeshPacket_encrypted_tag && mp.channel == 0 && !isBroadcast(mp.to);
-        mp.which_payload_variant == meshtastic_MeshPacket_encrypted_tag && mp.channel == 0 && mp.to != NODENUM_BROADCAST;
     // Beginning of logic whether to drop the packet based on Rebroadcast mode
     if (mp.which_payload_variant == meshtastic_MeshPacket_encrypted_tag &&
         (config.device.rebroadcast_mode == meshtastic_Config_DeviceConfig_RebroadcastMode_LOCAL_ONLY ||
@@ -28,7 +27,7 @@ bool RoutingModule::handleReceivedProtobuf(const meshtastic_MeshPacket &mp, mesh
 
     // FIXME - move this to a non promsicious PhoneAPI module?
     // Note: we are careful not to send back packets that started with the phone back to the phone
-    if ((mp.to == NODENUM_BROADCAST || isToUs(&mp)) && (mp.from != 0)) {
+    if ((isBroadcast(mp.to) || isToUs(&mp)) && (mp.from != 0)) {
         printPacket("Delivering rx packet", &mp);
         service->handleFromRadio(&mp);
     }