Ignore MQTT by default and then don't transmit downlink over LoRa

src/mesh/FloodingRouter.cpp

@@ -44,7 +44,8 @@ void FloodingRouter::sniffReceived(const meshtastic_MeshPacket *p, const meshtas
     }
     if ((p->to != getNodeNum()) && (p->hop_limit > 0) && (getFrom(p) != getNodeNum())) {
         if (p->id != 0) {
-            if (config.device.role != meshtastic_Config_DeviceConfig_Role_CLIENT_MUTE) {
+            if (config.device.role != meshtastic_Config_DeviceConfig_Role_CLIENT_MUTE &&
+                !(p->via_mqtt && config.lora.ignore_mqtt)) {
                 meshtastic_MeshPacket *tosend = packetPool.allocCopy(*p); // keep a copy because we will be sending it
 
                 tosend->hop_limit--; // bump down the hop count
@@ -54,7 +55,7 @@ void FloodingRouter::sniffReceived(const meshtastic_MeshPacket *p, const meshtas
                 // We are careful not to call our hooked version of send() - because we don't want to check this again
                 Router::send(tosend);
             } else {
-                LOG_DEBUG("Not rebroadcasting. Role = Role_ClientMute\n");
+                LOG_DEBUG("Not rebroadcasting. Role = Role_ClientMute or packet came via MQTT with ignore MQTT set\n");
             }
         } else {
             LOG_DEBUG("Ignoring a simple (0 id) broadcast\n");

src/mesh/MeshService.cpp

@@ -92,7 +92,7 @@ int MeshService::handleFromRadio(const meshtastic_MeshPacket *mp)
             "Received telemetry response. Skip sending our NodeInfo because this potentially a Repeater which will ignore our "
             "request for its NodeInfo.\n");
     } else if (mp->which_payload_variant == meshtastic_MeshPacket_decoded_tag && !nodeDB->getMeshNode(mp->from)->has_user &&
-               nodeInfoModule) {
+               nodeInfoModule && !(mp->via_mqtt && config.lora.ignore_mqtt)) {
         LOG_INFO("Heard a node on channel %d we don't know, sending NodeInfo and asking for a response.\n", mp->channel);
         nodeInfoModule->sendOurNodeInfo(mp->from, true, mp->channel);
     }

src/mesh/NodeDB.cpp

@@ -243,7 +243,7 @@ void NodeDB::installDefaultConfig()
     config.lora.region = meshtastic_Config_LoRaConfig_RegionCode_UNSET;
     config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST;
     config.lora.hop_limit = HOP_RELIABLE;
-    config.lora.ignore_mqtt = false;
+    config.lora.ignore_mqtt = true;
 #ifdef PIN_GPS_EN
     config.position.gps_en_gpio = PIN_GPS_EN;
 #endif

src/mesh/Router.cpp

@@ -486,7 +486,18 @@ void Router::handleReceived(meshtastic_MeshPacket *p, RxSource src)
 void Router::perhapsHandleReceived(meshtastic_MeshPacket *p)
 {
     // assert(radioConfig.has_preferences);
-    bool ignore = is_in_repeated(config.lora.ignore_incoming, p->from) || (config.lora.ignore_mqtt && p->via_mqtt);
+    bool ignore = is_in_repeated(config.lora.ignore_incoming, p->from);
+
+    if (p->via_mqtt && config.lora.ignore_mqtt) {
+        bool allow_mqtt = false;
+        // Check if this packet was received via MQTT on a channel we have downlink enabled (in that case packet is decoded here)
+        if (moduleConfig.mqtt.enabled && p->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
+            meshtastic_Channel channel = channels.getByIndex(p->channel);
+            if (channel.has_settings && channel.settings.downlink_enabled)
+                allow_mqtt = true;
+        }
+        ignore |= !allow_mqtt;
+    }
 
     if (ignore) {
         LOG_DEBUG("Ignoring incoming message, 0x%x is in our ignore list or came via MQTT\n", p->from);

src/modules/AdminModule.cpp

@@ -394,9 +394,7 @@ void AdminModule::handleSetConfig(const meshtastic_Config &c)
         if (isRegionUnset && config.lora.region > meshtastic_Config_LoRaConfig_RegionCode_UNSET) {
             config.lora.tx_enabled = true;
             initRegion();
-            if (myRegion->dutyCycle < 100) {
-                config.lora.ignore_mqtt = true; // Ignore MQTT by default if region has a duty cycle limit
-            }
+            config.lora.ignore_mqtt = true; // Ignore MQTT by default
             if (strcmp(moduleConfig.mqtt.root, default_mqtt_root) == 0) {
                 sprintf(moduleConfig.mqtt.root, "%s/%s", default_mqtt_root, myRegion->name);
                 changes = SEGMENT_CONFIG | SEGMENT_MODULECONFIG;