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1.14 changes merge
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@@ -396,10 +396,41 @@ mesh::Packet* RepeaterMesh::createSelfAdvert() {
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return createAdvert(self_id, app_data, app_data_len);
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}
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static uint8_t max_loop_minimal[] = { 0, /* 1-byte */ 4, /* 2-byte */ 2, /* 3-byte */ 1 };
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static uint8_t max_loop_moderate[] = { 0, /* 1-byte */ 2, /* 2-byte */ 1, /* 3-byte */ 1 };
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static uint8_t max_loop_strict[] = { 0, /* 1-byte */ 1, /* 2-byte */ 1, /* 3-byte */ 1 };
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bool RepeaterMesh::isLooped(const mesh::Packet* packet, const uint8_t max_counters[]) {
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uint8_t hash_size = packet->getPathHashSize();
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uint8_t hash_count = packet->getPathHashCount();
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uint8_t n = 0;
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const uint8_t* path = packet->path;
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while (hash_count > 0) {
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if (self_id.isHashMatch(path, hash_size)) n++;
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hash_count--;
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path += hash_size;
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}
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return n >= max_counters[hash_size];
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}
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bool RepeaterMesh::allowPacketForward(const mesh::Packet* packet) {
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if (_prefs.disable_fwd) return false;
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if (packet->isRouteFlood() && packet->getPathHashCount() >= _prefs.flood_max) return false;
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if (packet->isRouteFlood() && recv_pkt_region == nullptr) return false;
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if (packet->isRouteFlood() && _prefs.loop_detect != LOOP_DETECT_OFF) {
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const uint8_t* maximums;
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if (_prefs.loop_detect == LOOP_DETECT_MINIMAL) {
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maximums = max_loop_minimal;
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} else if (_prefs.loop_detect == LOOP_DETECT_MODERATE) {
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maximums = max_loop_moderate;
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} else {
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maximums = max_loop_strict;
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}
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if (isLooped(packet, maximums)) {
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MESH_DEBUG_PRINTLN("allowPacketForward: FLOOD packet loop detected!");
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return false;
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}
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}
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return true;
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}
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