Campaign N Slice N6, the final implementation slice.
ConnectResponse handshake retransmit:
- While the connection is unconfirmed, the Connect character-list pump
resends the IDENTICAL cleartext ConnectResponse (same sequence 1, same
cookie, the one encoded datagram - no new outbound state) on retail's
strict 0.333333333 s gate. Retail: ClientNet::ProcessConnection
@ 0x00545450, case cs_ConnectionRequestAcked @ 0x0054547B (the constant
load at 0x00545481; the mask-0x41 strictly-greater x87 test at
0x0054548C); ClientNet::SendConnectAck @ 0x005440F0 re-stamps
lastSentHandshake_ (0x00544102) and rebuilds the same cookie packet.
- Confirmation = the first checksum-valid post-negotiation packet whose
header lacks the ConnectRequest flag: retail's cs_ConnectionRequestAcked
-> cs_Connected edge (ClientNet::ProcessPacket @ 0x00545100, the 0x40000
exclusion at 0x0054514E, SetConnectionState(..., 5) at 0x00545160).
- The cadence rides the TransportClock (virtual-clock testable through
TransportClockSource); the Connect deadline stays wall-clock.
- ACE safety pinned against the N0 model: a duplicate while still
AuthConnectResponse re-routes idempotently through NetworkManager's
pre-route; after acceptance CheckState clause 2 drops it pre-CRC at
zero keystream cost.
- Pre-N6, one lost ConnectResponse was a hang to the Connect deadline;
the N5 decorator deliberately arms after this window, so nothing
covered it.
FragmentAssembler eviction (divergence register row AD-52):
- Partials evict 60 s after their last ACCEPTED fragment; the stamp
refreshes on every new fragment (retail's re-stamp rule,
ArrivedEphInfo::UpdateNetBlobID @ 0x0054AE00), so a merely-slow partial
can never age out - 60 s is a floor, not a tunable. Swept from
ReliableTransport.Sweep on retail's 5 s flush cadence
(Indicator::FlushTimedOutEphInfo @ 0x0054A3D0, the gate at 0x0054A3DC;
per-entry ArrivedEphInfo::fTimedOut @ 0x0054AE30). N4's RejectRetransmit
abandonment made an unrecoverable partial a REACHABLE permanent state;
the TTL reclaims it.
- A 64-entry completed-sequence ring drops late duplicate fragments of
already-completed messages instead of allocating a fresh partial that
can never complete (the completed-then-duplicate leak).
Fold-ins:
- N5 review LOW-5: NetProbeTests + LossyTransportDecoratorTests (the
static NetDiagnostics / Console.SetOut mutators) share one
DisableParallelization xunit collection so they never run alongside
classes constructing WorldSession.
- Campaign section 9: N6 ledger row recorded; N5 row verified carrying
4e290f00.
Gates: 757 Core.Net Release tests green (10 new); full solution Release
green (0 failures / 5 skips); connected lifecycle gate PASS; the
N5-strengthened connected loss gate PASS on its first live run (2%/seed 1:
dropped out=3 in=10, resends=1 nak-in=1 nak-out=5, cksum-fail=0
sanity-drop=0 uncached-nak=0).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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