Broadcast neighbor info

also update trunk

src/modules/NeighborInfoModule.h

@@ -0,0 +1,72 @@
+#pragma once
+#include "ProtobufModule.h"
+
+/*
+ * Neighborinfo module for sending info on each node's 0-hop neighbors to the mesh
+ */
+class NeighborInfoModule : public ProtobufModule<meshtastic_NeighborInfo>, private concurrency::OSThread
+{
+    meshtastic_Neighbor *neighbors;
+    pb_size_t *numNeighbors;
+
+  public:
+    /*
+     * Expose the constructor
+     */
+    NeighborInfoModule();
+
+    /* Reset neighbor info after clearing nodeDB*/
+    void resetNeighbors();
+
+    bool saveProtoForModule();
+
+  protected:
+    // Note: this holds our local info.
+    meshtastic_NeighborInfo neighborState;
+
+    /*
+     * Called to handle a particular incoming message
+     * @return true if you've guaranteed you've handled this message and no other handlers should be considered for it
+     */
+    virtual bool handleReceivedProtobuf(const meshtastic_MeshPacket &mp, meshtastic_NeighborInfo *nb) override;
+
+    /*
+     * Collect neighbor info from the nodeDB's history, capping at a maximum number of entries and max time
+     * @return the number of entries collected
+     */
+    uint32_t collectNeighborInfo(meshtastic_NeighborInfo *neighborInfo);
+
+    /* Allocate a new NeighborInfo packet */
+    meshtastic_NeighborInfo *allocateNeighborInfoPacket();
+
+    /// Find a neighbor in our DB, create an empty neighbor if missing
+    meshtastic_Neighbor *getOrCreateNeighbor(NodeNum n, int snr);
+
+    /*
+     * Send info on our node's neighbors into the mesh
+     */
+    void sendNeighborInfo(NodeNum dest = NODENUM_BROADCAST, bool wantReplies = false);
+
+    size_t getNumNeighbors() { return *numNeighbors; }
+
+    meshtastic_Neighbor *getNeighborByIndex(size_t x)
+    {
+        assert(x < *numNeighbors);
+        return &neighbors[x];
+    }
+
+    /* update neighbors with subpacket sniffed from network */
+    void updateNeighbors(const meshtastic_MeshPacket &mp, meshtastic_NeighborInfo *np);
+
+    void loadProtoForModule();
+
+    /* Does our periodic broadcast */
+    int32_t runOnce() override;
+
+    /* These are for debugging only */
+    void printNeighborInfo(const char *header, const meshtastic_NeighborInfo *np);
+    void printNodeDBNodes(const char *header);
+    void printNodeDBNeighbors(const char *header);
+    void printNodeDBSelection(const char *header, const meshtastic_NeighborInfo *np);
+};
+extern NeighborInfoModule *neighborInfoModule;