Prep work for better Store and Forward (#8999)

* make channels.h getHash public

* router.* make the encrypted packet copy available for modules to access

* Update src/mesh/Router.h

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Set p_encrypted to nullptr after release

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/mesh/Channels.h

@@ -96,6 +96,8 @@ class Channels
 
     bool setDefaultPresetCryptoForHash(ChannelHash channelHash);
 
+    int16_t getHash(ChannelIndex i) { return hashes[i]; }
+
   private:
     /** Given a channel index, change to use the crypto key specified by that index
      *
@@ -113,8 +115,6 @@ class Channels
      */
     int16_t generateHash(ChannelIndex channelNum);
 
-    int16_t getHash(ChannelIndex i) { return hashes[i]; }
-
     /**
      * Validate a channel, fixing any errors as needed
      */

src/mesh/Router.cpp

@@ -692,7 +692,7 @@ void Router::handleReceived(meshtastic_MeshPacket *p, RxSource src)
 
     // Store a copy of encrypted packet for MQTT
     DEBUG_HEAP_BEFORE;
-    meshtastic_MeshPacket *p_encrypted = packetPool.allocCopy(*p);
+    p_encrypted = packetPool.allocCopy(*p);
     DEBUG_HEAP_AFTER("Router::handleReceived", p_encrypted);
 
     // Take those raw bytes and convert them back into a well structured protobuf we can understand
@@ -758,6 +758,7 @@ void Router::handleReceived(meshtastic_MeshPacket *p, RxSource src)
     }
 
     packetPool.release(p_encrypted); // Release the encrypted packet
+    p_encrypted = nullptr;
 }
 
 void Router::perhapsHandleReceived(meshtastic_MeshPacket *p)

src/mesh/Router.h

@@ -91,6 +91,9 @@ class Router : protected concurrency::OSThread, protected PacketHistory
         before us */
     uint32_t rxDupe = 0, txRelayCanceled = 0;
 
+    // pointer to the encrypted packet
+    meshtastic_MeshPacket *p_encrypted = nullptr;
+
   protected:
     friend class RoutingModule;