Iter 14 — moves the v0.7.0 Python stub into the Rust production tree
so the sensing-server can decode incoming UDP datagrams by leading
magic and apply mesh-aligned timestamps to in-flight CSI frames.
Module: v2/crates/wifi-densepose-hardware/src/sync_packet.rs
Public surface (re-exported from the crate root):
- SyncPacket — 32-byte decoded packet
- SyncPacketFlags — bit0=leader, bit1=valid, bit2=smoothed
- SYNC_PACKET_MAGIC = 0xC511A110, SYNC_PACKET_SIZE = 32
Tests (all 7 passing, plus 122 existing hardware-crate tests still pass):
* follower_typical_packet_roundtrips — reproduces COM9 sync-pkt #1
from §A0.12, including the 1,163,565 µs offset §A0.10 measured
* leader_packet_has_local_close_to_epoch — COM12 leader case
(flags=0x03, epoch ≈ local, offset = -7 µs call-stack only)
* magic_mismatch_is_typed_error
* short_packet_is_typed_error
* all_flag_combinations_roundtrip — every (leader,valid,smoothed) triple
* sync_and_csi_magics_differ — host can dispatch by leading u32
* wire_size_constant_is_correct
Uses the existing ParseError variants (InvalidMagic, InsufficientData) so
the sensing-server's dispatch code can treat sync-packet decode failures
the same way it treats CSI frame decode failures.
Co-Authored-By: claude-flow <ruv@ruv.net>
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