expand relay_node and utilize to improve coverage knowledge

src/mesh/MeshTypes.h

@@ -37,12 +37,11 @@ enum RxSource {
  **/
 
 #ifdef USERPREFS_USE_COVERAGE_FILTER
-    #define HOP_MAX 15
+#define HOP_MAX 15
 #else
-    #define HOP_MAX 7
+#define HOP_MAX 7
 #endif
 
-
 /// We normally just use max 3 hops for sending reliable messages
 #define HOP_RELIABLE 3
 
@@ -53,7 +52,7 @@ enum RxSource {
 #define STALE_COVERAGE_SECONDS 60 * 60 * 0.5 // 1 hour
 
 // Size of the Bloom filter in bytes (128 bits)
-#define BLOOM_FILTER_SIZE_BYTES 16
+#define BLOOM_FILTER_SIZE_BYTES 13
 
 // Size of the Bloom filter in bits (128 bits)
 #define BLOOM_FILTER_SIZE_BITS (BLOOM_FILTER_SIZE_BYTES * 8)

src/mesh/NodeDB.cpp

@@ -498,7 +498,7 @@ void NodeDB::installDefaultConfig(bool preserveKey = false)
 #else
     config.lora.hop_limit = HOP_RELIABLE;
 #endif
-LOG_DEBUG("Hop Limit set to %x", config.lora.hop_limit);
+    LOG_DEBUG("Hop Limit set to %x", config.lora.hop_limit);
 #ifdef USERPREFS_CONFIG_LORA_IGNORE_MQTT
     config.lora.ignore_mqtt = USERPREFS_CONFIG_LORA_IGNORE_MQTT;
 #else
@@ -835,17 +835,12 @@ bool NodeDB::isValidCandidateForCoverage(const meshtastic_NodeInfoLite &node)
         LOG_DEBUG("Node 0x%x is not valid for coverage: Ignored", node.num);
         return false;
     }
-    // 3) Exclude nodes that aren't direct neighbors
+    // 3) Exclude MQTT-based nodes if desired
-    if (!node.has_hops_away || node.hops_away != 0) {
-        LOG_DEBUG("Node 0x%x is not valid for coverage: Not Direct Neighbor", node.num);
-        return false;
-    }
-    // 4) Exclude MQTT-based nodes if desired
     if (node.via_mqtt) {
         LOG_DEBUG("Node 0x%x is not valid for coverage: MQTT", node.num);
         return false;
     }
-    // 5) Must have last_heard
+    // 4) Must have last_heard
     if (node.last_heard == 0) {
         LOG_DEBUG("Node 0x%x is not valid for coverage: Missing Last Heard", node.num);
         return false;
@@ -869,7 +864,6 @@ bool NodeDB::isValidCandidateForCoverage(const meshtastic_NodeInfoLite &node)
 std::vector<NodeNum> NodeDB::getCoveredNodes(uint32_t timeWindowSecs)
 {
     uint32_t now = getTime();
-    NodeNum localNode = getNodeNum();
 
     // We'll collect (nodeNum, last_heard, snr) for both main DB + ephemeral
     struct NodeCandidate {
@@ -891,7 +885,7 @@ std::vector<NodeNum> NodeDB::getCoveredNodes(uint32_t timeWindowSecs)
 
         uint32_t age = now - node.last_heard;
         if (age <= timeWindowSecs) {
-            allCandidates.push_back(NodeCandidate{node.num, node.last_heard, node.snr});
+            allCandidates.push_back(NodeCandidate{node.relay_node, node.last_heard, node.snr});
         }
     }
 
@@ -903,9 +897,9 @@ std::vector<NodeNum> NodeDB::getCoveredNodes(uint32_t timeWindowSecs)
 
         uint32_t age = now - node.last_heard;
         if (age <= timeWindowSecs) {
-            allCandidates.push_back(NodeCandidate{node.num, node.last_heard, node.snr});
+            allCandidates.push_back(NodeCandidate{node.relay_node, node.last_heard, node.snr});
         } else {
-            LOG_DEBUG("Node 0x%x is not valid for coverage: Aged Out", node.num);
+            LOG_DEBUG("Node 0x%x is not valid for coverage: Aged Out", node.relay_node);
         }
     }
 
@@ -960,7 +954,7 @@ void NodeDB::cleanupMeshDB()
 
     for (int i = 0; i < numMeshNodes; i++) {
         if (meshNodes->at(i).has_user) {
-            if (meshNodes->at(i).has_hops_away && meshNodes->at(i).hops_away == 0 && meshNodes->at(i).last_heard > maxLastHeardDirectNeighbor_) {
+            if (meshNodes->at(i).last_heard > maxLastHeardDirectNeighbor_) {
                 maxLastHeardDirectNeighbor_ = meshNodes->at(i).last_heard;
             }
             if (meshNodes->at(i).user.public_key.size > 0) {

src/mesh/RadioInterface.cpp

@@ -637,8 +637,8 @@ size_t RadioInterface::beginSending(meshtastic_MeshPacket *p)
     radioBuffer.header.to = p->to;
     radioBuffer.header.id = p->id;
     radioBuffer.header.channel = p->channel;
-    radioBuffer.header.next_hop = 0;   // *** For future use ***
+    radioBuffer.header.next_hop = 0;                      // *** For future use ***
-    radioBuffer.header.relay_node = 0; // *** For future use ***
+    radioBuffer.header.relay_node = nodeDB->getNodeNum(); // *** For future use ***
     if (p->hop_limit > HOP_MAX) {
         LOG_WARN("hop limit %d is too high, setting to %d", p->hop_limit, HOP_RELIABLE);
         p->hop_limit = HOP_RELIABLE;

src/mesh/RadioInterface.h

@@ -42,7 +42,7 @@ typedef struct {
     uint8_t next_hop;
 
     // ***For future use*** Last byte of the NodeNum of the node that will relay/relayed this packet
-    uint8_t relay_node;
+    NodeNum relay_node;
 
     // A 16-byte Bloom filter that tracks coverage of the current node.
     uint8_t coverage_filter[BLOOM_FILTER_SIZE_BYTES] __attribute__((__aligned__));

src/mesh/generated/meshtastic/deviceonly.pb.h

@@ -92,6 +92,8 @@ typedef struct _meshtastic_NodeInfoLite {
     bool is_ignored;
     /* Last byte of the node number of the node that should be used as the next hop to reach this node. */
     uint8_t next_hop;
+    /* Node id of the relaying node. */
+    uint32_t relay_node;
 } meshtastic_NodeInfoLite;
 
 /* This message is never sent over the wire, but it is used for serializing DB

src/mesh/generated/meshtastic/mesh.pb.h

@@ -690,7 +690,7 @@ typedef struct _meshtastic_MqttClientProxyMessage {
 
 typedef PB_BYTES_ARRAY_T(256) meshtastic_MeshPacket_encrypted_t;
 typedef PB_BYTES_ARRAY_T(32) meshtastic_MeshPacket_public_key_t;
-typedef PB_BYTES_ARRAY_T(16) meshtastic_MeshPacket_coverage_filter_t;
+typedef PB_BYTES_ARRAY_T(13) meshtastic_MeshPacket_coverage_filter_t;
 /* A packet envelope sent/received over the mesh
  only payload_variant is sent in the payload portion of the LORA packet.
  The other fields are either not sent at all, or sent in the special 16 byte LORA header. */
@@ -770,7 +770,7 @@ typedef struct _meshtastic_MeshPacket {
     uint8_t next_hop;
     /* Last byte of the node number of the node that will relay/relayed this packet.
  Set by the firmware internally, clients are not supposed to set this. */
-    uint8_t relay_node;
+    uint32_t relay_node;
     /* *Never* sent over the radio links.
  Timestamp after which this packet may be sent.
  Set by the firmware internally, clients are not supposed to set this. */