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Reject flood trace and control packets

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mikecarper committed 2026-09-17 17:30:43 -07:00
1 parent eb9d41ee75
commit e4db57dbef
6 files changed
+160 -19
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src/Packet.h
+14
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@@ -84,6 +84,20 @@ public:
bool isRouteFlood() const { return getRouteType() == ROUTE_TYPE_FLOOD || getRouteType() == ROUTE_TYPE_TRANSPORT_FLOOD; }
bool isRouteDirect() const { return getRouteType() == ROUTE_TYPE_DIRECT || getRouteType() == ROUTE_TYPE_TRANSPORT_DIRECT; }
// TRACE gathers per-hop state and CONTROL can carry local discovery state.
// Neither has flood semantics. Keep this header-only so raw receive sinks
// can reject a prohibited packet before exporting it to USB/MQTT/bridges.
static bool isDirectOnlyPayloadType(uint8_t payload_type) {
return payload_type == PAYLOAD_TYPE_TRACE || payload_type == PAYLOAD_TYPE_CONTROL;
}
static bool violatesRoutePolicy(uint8_t packet_header) {
const uint8_t route = packet_header & PH_ROUTE_MASK;
const uint8_t payload_type = (packet_header >> PH_TYPE_SHIFT) & PH_TYPE_MASK;
return (route == ROUTE_TYPE_FLOOD || route == ROUTE_TYPE_TRANSPORT_FLOOD)
&& isDirectOnlyPayloadType(payload_type);
}
bool violatesRoutePolicy() const { return violatesRoutePolicy(header); }
bool hasTransportCodes() const { return getRouteType() == ROUTE_TYPE_TRANSPORT_FLOOD || getRouteType() == ROUTE_TYPE_TRANSPORT_DIRECT; }
/**