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Better checking for fallback to flooding

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This commit is contained in:
GUVWAF
2024-11-05 21:27:10 +01:00
parent bb64b1480b
commit 24ff7c0bfb
3 changed files with 26 additions and 8 deletions
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24
src/mesh/PacketHistory.cpp
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@@ -29,6 +29,7 @@ bool PacketHistory::wasSeenRecently(const meshtastic_MeshPacket *p, bool withUpd
r.rxTimeMsec = millis();
r.next_hop = p->next_hop;
r.relayed_by[0] = p->relay_node;
LOG_INFO("Add relayed_by 0x%x for id=0x%x", p->relay_node, r.id);
auto found = recentPackets.find(r);
bool seenRecently = (found != recentPackets.end()); // found not equal to .end() means packet was seen recently
@@ -48,10 +49,15 @@ bool PacketHistory::wasSeenRecently(const meshtastic_MeshPacket *p, bool withUpd
}
if (seenRecently) {
// If it was seen with a next-hop not set to us, relayer is still the same and now it's NO_NEXT_HOP_PREFERENCE, it's a
// fallback to flooding, so we consider it unseen because we might need to handle it now
if (found->next_hop != NO_NEXT_HOP_PREFERENCE && found->next_hop != nodeDB->getLastByteOfNodeNum(nodeDB->getNodeNum()) &&
found->relayed_by[0] == p->relay_node && p->next_hop == NO_NEXT_HOP_PREFERENCE) {
// If it was seen with a next-hop not set to us and now it's NO_NEXT_HOP_PREFERENCE, relayer relayed already before, it's
// a fallback to flooding. If we didn't already relay and the next-hop neither, consider it unseen because we might need
// to handle it now
uint8_t ourRelayID = nodeDB->getLastByteOfNodeNum(nodeDB->getNodeNum());
if (found->sender != nodeDB->getNodeNum() && found->next_hop != NO_NEXT_HOP_PREFERENCE &&
p->next_hop == NO_NEXT_HOP_PREFERENCE && found->next_hop != nodeDB->getLastByteOfNodeNum(nodeDB->getNodeNum()) &&
p->relay_node != 0 && wasRelayer(p->relay_node, found) && !wasRelayer(ourRelayID, found) &&
!wasRelayer(found->next_hop, found)) {
LOG_WARN("Fallback to flooding, consider unseen relay_node=0x%x", p->relay_node);
seenRecently = false;
}
}
@@ -113,11 +119,19 @@ bool PacketHistory::wasRelayer(const uint8_t relayer, const uint32_t id, const N
return false;
}
return wasRelayer(relayer, found);
}
/* Check if a certain node was a relayer of a packet in the history given iterator
* @return true if node was indeed a relayer, false if not */
bool PacketHistory::wasRelayer(const uint8_t relayer, std::unordered_set<PacketRecord, PacketRecordHashFunction>::iterator r)
{
for (uint8_t i = 0; i < NUM_RELAYERS; i++) {
if (found->relayed_by[i] == relayer) {
if (r->relayed_by[i] == relayer) {
return true;
}
}
return false;
}
// Remove a relayer from the list of relayers of a packet in the history given an ID and sender