Add nodedb channel handling (#2384)

* send ourNodeInfo to channel we got a message we heared someone new

* store node-channel into nodeDB

* use channel from nodeDb to send local messages

* update protobufs

* fmt and fix braces

* respect requested channel for local send, only store channel while getting a nodeinfo packet

---------

Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mesh/MeshService.cpp

@@ -77,8 +77,8 @@ int MeshService::handleFromRadio(const meshtastic_MeshPacket *mp)
 
     nodeDB.updateFrom(*mp); // update our DB state based off sniffing every RX packet from the radio
     if (mp->which_payload_variant == meshtastic_MeshPacket_decoded_tag && !nodeDB.getNode(mp->from)->has_user && nodeInfoModule) {
-        LOG_INFO("Heard a node we don't know, sending NodeInfo and asking for a response.\n");
-        nodeInfoModule->sendOurNodeInfo(mp->from, true);
+        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);
     }
 
     printPacket("Forwarding to phone", mp);
@@ -242,13 +242,13 @@ void MeshService::sendNetworkPing(NodeNum dest, bool wantReplies)
 
     if (node->has_position && (node->position.latitude_i != 0 || node->position.longitude_i != 0)) {
         if (positionModule) {
-            LOG_INFO("Sending position ping to 0x%x, wantReplies=%d\n", dest, wantReplies);
-            positionModule->sendOurPosition(dest, wantReplies);
+            LOG_INFO("Sending position ping to 0x%x, wantReplies=%d, channel=%d\n", dest, wantReplies, node->channel);
+            positionModule->sendOurPosition(dest, wantReplies, node->channel);
         }
     } else {
         if (nodeInfoModule) {
-            LOG_INFO("Sending nodeinfo ping to 0x%x, wantReplies=%d\n", dest, wantReplies);
-            nodeInfoModule->sendOurNodeInfo(dest, wantReplies);
+            LOG_INFO("Sending nodeinfo ping to 0x%x, wantReplies=%d, channel=%d\n", dest, wantReplies, node->channel);
+            nodeInfoModule->sendOurNodeInfo(dest, wantReplies, node->channel);
         }
     }
 }

src/mesh/NodeDB.cpp

@@ -721,7 +721,7 @@ void NodeDB::updateUser(uint32_t nodeId, const meshtastic_User &p)
 void NodeDB::updateFrom(const meshtastic_MeshPacket &mp)
 {
     if (mp.which_payload_variant == meshtastic_MeshPacket_decoded_tag && mp.from) {
-        LOG_DEBUG("Update DB node 0x%x, rx_time=%u\n", mp.from, mp.rx_time);
+        LOG_DEBUG("Update DB node 0x%x, rx_time=%u, channel=%d\n", mp.from, mp.rx_time, mp.channel);
 
         meshtastic_NodeInfo *info = getOrCreateNode(getFrom(&mp));
         if (!info) {
@@ -733,9 +733,22 @@ void NodeDB::updateFrom(const meshtastic_MeshPacket &mp)
 
         if (mp.rx_snr)
             info->snr = mp.rx_snr; // keep the most recent SNR we received for this node.
+
+        if (mp.decoded.portnum == meshtastic_PortNum_NODEINFO_APP) {
+            info->channel = mp.channel;
+        }
     }
 }
 
+uint8_t NodeDB::getNodeChannel(NodeNum n)
+{
+    meshtastic_NodeInfo *info = getNode(n);
+    if (!info) {
+        return 0; // defaults to PRIMARY
+    }
+    return info->channel;
+}
+
 /// Find a node in our DB, return null for missing
 /// NOTE: This function might be called from an ISR
 meshtastic_NodeInfo *NodeDB::getNode(NodeNum n)

src/mesh/NodeDB.h

@@ -113,6 +113,9 @@ class NodeDB
     /// pick a provisional nodenum we hope no one is using
     void pickNewNodeNum();
 
+    // get channel channel index we heard a nodeNum on, defaults to 0 if not found
+    uint8_t getNodeChannel(NodeNum n);
+
     /// Find a node in our DB, return null for missing
     meshtastic_NodeInfo *getNode(NodeNum n);
 

src/mesh/Router.cpp

@@ -173,6 +173,10 @@ ErrorCode Router::sendLocal(meshtastic_MeshPacket *p, RxSource src)
             handleReceived(p, src);
         }
 
+        if (p->channel) // don't override if a channel was requested
+            p->channel = nodeDB.getNodeChannel(p->to);
+        LOG_DEBUG("localSend to channel %d\n", p->channel);
+
         return send(p);
     }
 }