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Limit flood advert packet forwarding, implements #1223

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This commit is contained in:
Matthias Wientapper
2026-01-07 21:24:25 +01:00
parent 4b7684c7df
commit bd4c4cf69d
1 changed files with 8 additions and 0 deletions
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8
examples/simple_repeater/MyMesh.cpp
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@@ -390,6 +390,14 @@ bool MyMesh::allowPacketForward(const mesh::Packet *packet) {
MESH_DEBUG_PRINTLN("allowPacketForward: unknown transport code, or wildcard not allowed for FLOOD packet");
return false;
}
// Limit flood advert paket forwarding using a probabilistic reduction defined by P(h) = 0.308^(hops-1)
// https://github.com/meshcore-dev/MeshCore/issues/1223
double_t roll_dice = (double)rand() / RAND_MAX;
double_t forw_prob = pow(0.308, packet->path_len - 1);
if (packet->getPayloadType() == PAYLOAD_TYPE_ADVERT && packet->isRouteFlood() && roll_dice > forw_prob)
return false;
// all other packets
return true;
}