Cancel rebroadcast in Tx queue upon receiving another rebroadcast (#2538)

* Make portduino great again

* Upon receiving packet that was seen recently, cancel a rebroadcast if there was one in Tx queue already

---------

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

arch/portduino/portduino.ini

@@ -1,6 +1,6 @@
 ; The Portduino based sim environment on top of any host OS, all hardware will be simulated
 [portduino_base]
-platform = https://github.com/meshtastic/platform-native.git#096b3c3e9c5c8e19d4c3b6cd803fffef2a9be4c5
+platform = https://github.com/meshtastic/platform-native.git#489ff929dca0bb768256ba2de45f95815111490f
 framework = arduino
 
 build_src_filter = 
@@ -27,4 +27,4 @@ lib_deps =
 build_flags =
   ${arduino_base.build_flags}
   -fPIC
-  -Isrc/platform/portduino
+  -Isrc/platform/portduino

src/mesh/FloodingRouter.cpp

@@ -21,6 +21,7 @@ bool FloodingRouter::shouldFilterReceived(const meshtastic_MeshPacket *p)
 {
     if (wasSeenRecently(p)) { // Note: this will also add a recent packet record
         printPacket("Ignoring incoming msg, because we've already seen it", p);
+        Router::cancelSending(p->from, p->id); // cancel rebroadcast of this message *if* there was already one
         return true;
     }
 
@@ -62,4 +63,4 @@ void FloodingRouter::sniffReceived(const meshtastic_MeshPacket *p, const meshtas
     }
     // handle the packet as normal
     Router::sniffReceived(p, c);
-}
+}