The wire-stack audit checked the transport layer by hand and found it clean:
PacketHeader's seven fields match ACE's Pack order exactly, the optional-header
sections are parsed in ACE's order, and PacketHeaderFlags is a twenty-three of
twenty-three value match including the sparse gaps between 0x04 and 0x100 and
between 0x00800000 and 0x01000000.
Clean is worth freezing. These bits are not design choices; each one gates an
optional-header section, so a single wrong value shifts every following
section's offset and takes the packet checksum with it. The failure would not
look like a wrong flag, it would look like a corrupt connection. The enum is
small enough to pin exhaustively, so this transcribes ACE's declaration and
asserts both directions: every ACE flag exists here with ACE's value, and we
declare nothing ACE does not.
Core.Net tests go 630 to 654.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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