Keep vanetza-idf in obu-firmware, so a plain clone builds the firmware

obu-firmware builds against the vanetza-idf C-ITS library, which until now
came from the colleague's microbu-esp32c5 tree beside the repository and was
not tracked here, so a clone of this repository could not build the firmware
it ships. The library alone is now part of obu-firmware, as
obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit
cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from
there by default; -DVANETZA_IDF_DIR still points the build elsewhere.

The rest of the colleague's tree (their own VAM firmware, PKI tooling,
station-link Python tools, the V2X2MAP bridge) stays out of this repository
and gitignored; nothing is pushed to their repository. NOTES.md, docs/06,
TODO.md and the pcap verifier's usage line point at the new location.

obu-firmware/external/vanetza-idf/vanetza/geonet/mib.cpp

@@ -0,0 +1,66 @@
+#include "mib.hpp"
+#include <boost/units/systems/si/prefixes.hpp>
+
+namespace vanetza
+{
+namespace geonet
+{
+
+using namespace vanetza::units::si;
+using vanetza::units::degrees;
+using boost::units::si::kilo;
+using boost::units::si::milli;
+
+const auto milliseconds = milli * seconds;
+
+ManagementInformationBase::ManagementInformationBase() :
+    itsGnLocalAddrConfMethod(AddrConfMethod::Managed),
+    itsGnProtocolVersion(1),
+    itsGnIsMobile(true),
+    itsGnIfType(InterfaceType::ITS_G5),
+    itsGnMinimumUpdateFrequencyEPV(1.0 / (1000.0 * milliseconds)),
+    itsGnPaiInterval(80 * meters),
+    itsGnMaxSduSize(1398),
+    itsGnMaxGeoNetworkingHeaderSize(88),
+    itsGnLifetimeLocTE(20 * seconds),
+    itsGnSecurity(false),
+    itsGnSnDecapResultHandling(SecurityDecapHandling::Strict),
+    itsGnLocationServiceMaxRetrans(10),
+    itsGnLocationServiceRetransmitTimer(1 * seconds),
+    itsGnLocationServicePacketBufferSize(1024),
+    itsGnBeaconServiceRetransmitTimer(3 * seconds),
+    itsGnBeaconServiceMaxJitter(itsGnBeaconServiceRetransmitTimer / 4.0),
+    itsGnDefaultHopLimit(10),
+    itsGnDPLLength(8),
+    itsGnMaxPacketLifetime(Lifetime::Base::Hundred_Seconds, 6),
+    itsGnDefaultPacketLifetime(Lifetime::Base::Ten_Seconds, 6),
+    itsGnMaxPacketDataRate(100),
+    itsGnMaxPacketDataRateEmaBeta(0.9),
+    itsGnMaxGeoAreaSize(10 * kilo * kilo * square_meters),
+    itsGnMinPacketRepetitionInterval(100 * milliseconds),
+    itsGnNonAreaForwardingAlgorithm(UnicastForwarding::Greedy),
+    itsGnAreaForwardingAlgorithm(BroadcastForwarding::CBF),
+    itsGnCbfMinTime(1 * milliseconds),
+    itsGnCbfMaxTime(100 * milliseconds),
+    itsGnDefaultMaxCommunicationRange(1000 * meters),
+    itsGnBroadcastCBFDefSectorAngle(30 * degrees),
+    itsGnUcForwardingPacketBufferSize(256),
+    itsGnBcForwardingPacketBufferSize(1024),
+    itsGnCbfPacketBufferSize(256),
+    itsGnDefaultTrafficClass(false, false, 0),
+    vanetzaDefaultSeed(0xc0114c2c),
+    vanetzaCbfMaxCounter(1),
+    vanetzaDeferInitialBeacon(Clock::duration::zero()),
+    vanetzaDisableBeaconing(false),
+    vanetzaMultiHopDuplicateAddressDetection(false),
+    vanetzaFadingCbfCounter(false),
+    vanetzaFadingCbfCounterLifetime(4.0 * itsGnCbfMaxTime),
+    vanetzaNeighbourFlagExpiry(Clock::duration::zero()),
+    vanetzaGbcMemoryCapacity(0),
+    vanetzaGbcPassUpOutsideDestination(false)
+{
+}
+
+} // namespace geonet
+} // namespace vanetza
+