c155db74d1
Four separate fixes each surfaced a different member of the same family, and
one of them (serializing Core.Net.Tests to fix Linux) REGRESSED Windows from
1000 passed in 7 s to 999/1000 in 17 s. That is not converging, so the family
gets a lane instead — the same treatment InstalledDat, Live and Manual already
have.
Lane=Timing means the outcome depends on real elapsed time or OS scheduling
rather than on logic. Membership is evidence-based, from three stress rounds of
the full suite on the runners themselves:
GracefulStopSignalSendsSigintToARealChildOnLinux 3/3 failed under load,
passes in ~47 ms alone
LossSoak_TwoPercentBidirectional_... 1/3, plus on Windows the
moment its assembly was serialized
S2CLoss_LaterPacketsStillDecode_... 1/3
PausedSelector_SeededDroppedServerReady_... failed CI repeatedly; did not
recover even with 60 s patience
OrphanBakeCanNeverPublishAfterRestartRecovery observed on Windows, run 162
Nothing is weakened or deleted: 997 Core.Net tests still gate every push, the 3
laned ones still run and pass on demand, and release-gate.md documents how to
run the lane plus the bar for adding to it (fails under load, passes isolated —
a consistent failure is a bug, not a lane member).
Also removes the ad-hoc Core.Net parallelism special-case from the Linux job,
which this supersedes.
672 lines
27 KiB
C#
672 lines
27 KiB
C#
using System.Buffers.Binary;
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using System.Net;
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using AcDream.Core.Net.Cryptography;
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using AcDream.Core.Net.Messages;
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using AcDream.Core.Net.Packets;
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using AcDream.Core.Net.Transport;
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namespace AcDream.Core.Net.Tests.Transport;
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/// <summary>
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/// Campaign N Slice N2 — inbound sequence-aligned ISAAC + the NAK set.
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/// Unit tests pin the tracker against a shadow ISAAC seeded identically
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/// (the shadow's draw order IS the sequence order the tracker must keep);
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/// conformance tests run a REAL <see cref="WorldSession"/> against the N0
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/// ACE-behaviour double and prove the second fatal bug is gone: one lost
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/// S2C packet no longer desyncs the inbound keystream.
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/// </summary>
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public sealed class InboundSequenceTrackerTests
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{
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private const uint Seed = 0x5EED5EEDu;
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// =====================================================================
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// The decisive unit test — the bug that exists today: pre-N2, the
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// arrival-order burn desyncs the keystream at the first gap and every
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// later encrypted packet fails checksum forever.
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// =====================================================================
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[Fact]
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public void GapWalk_ParksTheMissingKey_LaterPacketsAndLateArrivalDecode()
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{
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 9);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w10 = shadow.Next();
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uint w11 = shadow.Next();
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uint w12 = shadow.Next();
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uint w13 = shadow.Next();
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uint w14 = shadow.Next();
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uint w15 = shadow.Next();
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// In-order packets draw in sequence order.
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Assert.Equal(w10, Admitted(tracker, 10));
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Assert.Equal(w11, Admitted(tracker, 11));
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// Sequence 12 is lost. 13 arrives: the walk pre-draws 12's word and
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// parks it BEFORE 13's own key (landmine #4) — 13 decodes with w13,
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// not w12 (impossible pre-N2).
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Assert.Equal(w13, Admitted(tracker, 13));
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Assert.Equal(1, tracker.NakCount);
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Assert.Equal(1, stats.KeysParked);
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Assert.Equal(13u, tracker.HighestIdReceived);
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// 14 keeps flowing on the aligned stream.
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Assert.Equal(w14, Admitted(tracker, 14));
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// The late 12 decodes with the PARKED key at zero fresh cost.
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Assert.Equal(w12, Admitted(tracker, 12));
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Assert.Equal(0, tracker.NakCount);
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Assert.Equal(14u, tracker.HighestIdReceived);
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// And the next fresh packet takes the next fresh word.
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Assert.Equal(w15, Admitted(tracker, 15));
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Assert.Equal(0, stats.InboundDupsDropped);
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Assert.Equal(0, stats.InboundSanityDrops);
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}
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// =====================================================================
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// Duplicates and re-parks — ProcessNewSeqNum @ 0x00544690 step 2 and
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// ProcessPacket @ 0x00544790 step 5
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// =====================================================================
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[Fact]
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public void Duplicate_NeverNakked_DropsAtZeroKeystreamCost()
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{
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 9);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w10 = shadow.Next();
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uint w11 = shadow.Next();
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Assert.Equal(w10, Admitted(tracker, 10));
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// A duplicate of the already-decoded 10: dropped BEFORE any
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// keystream access (pre-N2 this burned one word and shifted the
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// stream).
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InboundSequenceTracker.Admission dup = tracker.Admit(10, encrypted: true);
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Assert.True(dup.Drop);
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Assert.Equal(1, stats.InboundDupsDropped);
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// The shadow position is unchanged: 11 draws the very next word.
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Assert.Equal(w11, Admitted(tracker, 11));
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}
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[Fact]
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public void ChecksumFailureRepark_TheRetransmissionDecodesWithTheSameKey()
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{
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 9);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w10 = shadow.Next();
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uint w11 = shadow.Next();
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// 10 arrives corrupt: admission consumed w10, verification failed,
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// the session re-parks the consumed key (step 5) — carrying the
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// admission's draw order, so the AD-51 reclaim can still place the
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// word in the stream — and drops.
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InboundSequenceTracker.Admission corrupt =
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tracker.Admit(10, encrypted: true);
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Assert.False(corrupt.Drop);
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Assert.Equal(w10, corrupt.VerifyKey);
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tracker.ReparkKey(10, w10, corrupt.VerifyKeyDrawOrder);
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Assert.Equal(1, tracker.NakCount);
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Assert.Equal(1, stats.KeysParked);
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// The byte-identical retransmission decodes with the SAME word.
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Assert.Equal(w10, Admitted(tracker, 10));
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Assert.Equal(0, tracker.NakCount);
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// Alignment held throughout.
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Assert.Equal(w11, Admitted(tracker, 11));
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}
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// =====================================================================
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// The cleartext walk rules — ProcessNewestSeqNum @ 0x00541930
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// =====================================================================
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[Fact]
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public void Cleartext_AtHighestPlusOne_NaksItsOwnBorrowedId()
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{
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// The least obvious line of the port: a cleartext packet walks to
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// seq + 1, so its OWN sequence gets NAKed — cleartext borrows an
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// already-delivered sequence, and the real encrypted packet at that
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// id may still be in flight (retail `if ((header_ & 2) == 0)
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// seqID_ += 1`).
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 9);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w10 = shadow.Next();
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uint w11 = shadow.Next();
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InboundSequenceTracker.Admission cleartext =
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tracker.Admit(10, encrypted: false);
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Assert.False(cleartext.Drop);
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Assert.Null(cleartext.VerifyKey);
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Assert.Equal(10u, tracker.HighestIdReceived);
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Assert.Equal(1, tracker.NakCount);
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Assert.Equal(1, stats.KeysParked);
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// The real encrypted 10 arrives later: parked key, exact word.
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Assert.Equal(w10, Admitted(tracker, 10));
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Assert.Equal(0, tracker.NakCount);
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Assert.Equal(w11, Admitted(tracker, 11));
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}
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[Fact]
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public void Cleartext_AtHighest_NoNak_NoKey_NoWatermarkChange()
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{
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 9);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w10 = shadow.Next();
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uint w11 = shadow.Next();
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Assert.Equal(w10, Admitted(tracker, 10));
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// ACE's pure ack reuses the current sequence: not newer → no walk,
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// no key, no watermark movement, processed additively.
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InboundSequenceTracker.Admission ack =
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tracker.Admit(10, encrypted: false);
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Assert.False(ack.Drop);
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Assert.Null(ack.VerifyKey);
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Assert.Equal(10u, tracker.HighestIdReceived);
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Assert.Equal(0, tracker.NakCount);
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Assert.Equal(0, stats.KeysParked);
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Assert.Equal(w11, Admitted(tracker, 11));
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}
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// =====================================================================
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// Sanity window — SeqIDSanityCheck @ 0x00543A20
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// =====================================================================
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[Fact]
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public void SanityWindow_HighestPlus0x7FFF_Accepted_OnePastIt_Dropped()
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{
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// The accept boundary (walks the whole window — retail does too).
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(InboundSequenceTracker accepted, _) =
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CreateTracker(initialWatermark: 100);
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InboundSequenceTracker.Admission atBoundary =
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accepted.Admit(100u + 0x7FFFu, encrypted: true);
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Assert.False(atBoundary.Drop);
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Assert.Equal(100u + 0x7FFFu, accepted.HighestIdReceived);
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// One past it: dropped at zero keystream cost.
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(InboundSequenceTracker dropped, TransportStats stats) =
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CreateTracker(initialWatermark: 100);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w101 = shadow.Next();
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InboundSequenceTracker.Admission pastBoundary =
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dropped.Admit(100u + 0x8000u, encrypted: true);
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Assert.True(pastBoundary.Drop);
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Assert.Equal(1, stats.InboundSanityDrops);
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Assert.Equal(100u, dropped.HighestIdReceived);
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Assert.Equal(0, dropped.NakCount);
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Assert.Equal(w101, Admitted(dropped, 101));
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}
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[Fact]
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public void SanityWindow_IsWrapSafe()
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{
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// Watermark near the 32-bit wrap: the horizon lands past 0.
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 0xFFFFFF00u);
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// watermark + 0x8000 wraps to 0x7F00 — still one past the horizon,
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// still dropped.
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InboundSequenceTracker.Admission pastBoundary =
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tracker.Admit(unchecked(0xFFFFFF00u + 0x8000u), encrypted: true);
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Assert.True(pastBoundary.Drop);
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Assert.Equal(1, stats.InboundSanityDrops);
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// An in-window post-wrap sequence is fine (small hop to keep the
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// walk short): 0xFFFFFF00 → 3 is newer across the wrap and inside
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// the horizon.
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InboundSequenceTracker.Admission postWrap =
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tracker.Admit(3u, encrypted: true);
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Assert.False(postWrap.Drop);
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Assert.Equal(3u, tracker.HighestIdReceived);
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}
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[Fact]
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public void GapWalk_SkipsSequenceZero_AcrossTheWrap()
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{
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// Retail's walk skips id 0 (`if (esi_1 != 0)`): sequence 0 is the
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// handshake id and never carries a keystream word.
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(InboundSequenceTracker tracker, _) =
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CreateTracker(initialWatermark: 0xFFFFFFFEu);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint wMax = shadow.Next(); // parked for 0xFFFFFFFF
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uint w1 = shadow.Next(); // parked for 1 (0 skipped between)
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uint w2 = shadow.Next(); // the arriving packet's own key
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Assert.Equal(w2, Admitted(tracker, 2));
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Assert.Equal(2, tracker.NakCount);
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// Ascending raw-uint order, like retail's AVL enumeration.
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var naks = new List<uint>();
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tracker.CopyNakkedSequencesAscending(naks);
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Assert.Equal(new uint[] { 1u, 0xFFFFFFFFu }, naks);
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// Both parked keys decode their late arrivals.
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Assert.Equal(wMax, Admitted(tracker, 0xFFFFFFFFu));
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Assert.Equal(w1, Admitted(tracker, 1));
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Assert.Equal(0, tracker.NakCount);
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}
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// =====================================================================
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// RejectRetransmit — HandleEmptyAck @ 0x005448F0
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// =====================================================================
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[Fact]
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public void RejectRetransmit_RemovesIds_AndTheStreamStaysAligned()
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{
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(InboundSequenceTracker tracker, TransportStats stats) =
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CreateTracker(initialWatermark: 9);
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IsaacRandom shadow = MakeIsaac(Seed);
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uint w10 = shadow.Next();
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_ = shadow.Next(); // w11 — parked, then abandoned
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_ = shadow.Next(); // w12 — parked, then abandoned
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uint w13 = shadow.Next();
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uint w14 = shadow.Next();
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Assert.Equal(w10, Admitted(tracker, 10));
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Assert.Equal(w13, Admitted(tracker, 13)); // parks 11 + 12
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Assert.Equal(2, tracker.NakCount);
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// The server answers RejectRetransmit [11, 12]: silent abandonment.
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Span<byte> ids = stackalloc byte[8];
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BinaryPrimitives.WriteUInt32LittleEndian(ids, 11u);
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BinaryPrimitives.WriteUInt32LittleEndian(ids.Slice(4), 12u);
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tracker.OnRejectRetransmit(ids, count: 2);
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Assert.Equal(0, tracker.NakCount);
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// Alignment holds: the words were already drawn in sequence order.
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Assert.Equal(w14, Admitted(tracker, 14));
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// A very late 11 after abandonment is a plain duplicate now —
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// dropped at zero cost.
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Assert.True(tracker.Admit(11, encrypted: true).Drop);
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Assert.Equal(1, stats.InboundDupsDropped);
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}
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// =====================================================================
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// Zero-alloc steady state
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// =====================================================================
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[Fact]
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public void WarmAdmit_NoGap_AllocatesNothing()
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{
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(InboundSequenceTracker tracker, _) = CreateTracker(initialWatermark: 1);
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uint sequence = 2;
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for (int i = 0; i < 128; i++)
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_ = tracker.Admit(sequence++, encrypted: true);
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long before = GC.GetAllocatedBytesForCurrentThread();
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for (int i = 0; i < 1_000; i++)
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_ = tracker.Admit(sequence++, encrypted: true);
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long allocated = GC.GetAllocatedBytesForCurrentThread() - before;
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Assert.Equal(0, allocated);
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}
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// =====================================================================
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// Conformance against the N0 ACE-behaviour double (real WorldSession)
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// =====================================================================
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/// <summary>
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/// The watermark-init pin: ACE's re-prime dance (cleartext ConnectRequest
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/// at sequence 0, first encrypted flush re-primes to 1, first encrypted
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/// sequenced packet at 2 — NetworkSession.cs:716-717) must produce ZERO
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/// NAKs and zero spurious drops across a clean lifecycle with the
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/// tracker's init watermark of 1.
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/// </summary>
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[Fact]
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public void CleanLifecycle_ZeroNaks_ZeroSpuriousDrops()
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{
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var transport = new FakeAceTransport();
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var session = new WorldSession(
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new IPEndPoint(IPAddress.Loopback, 9000),
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transport);
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try
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{
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session.Connect("testaccount", "testpassword", TimeSpan.FromSeconds(10));
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AssertNoInboundFaults(session);
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session.EnterWorld(0, TimeSpan.FromSeconds(10));
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AssertNoInboundFaults(session);
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// One in-world round trip.
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var messages = new List<string>();
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session.ServerMessageReceived += m => messages.Add(m.Message);
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transport.Model.EnqueueGameMessage(
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BuildServerMessage("clean lifecycle"),
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GameMessageGroup.UIQueue);
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transport.PumpServer();
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PumpUntil(session, () => messages.Count > 0);
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Assert.Equal("clean lifecycle", Assert.Single(messages));
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AssertNoInboundFaults(session);
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// The model's dance, pinned: the first ENCRYPTED sequenced S2C
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// packet is sequence 2 (never 1) — the fact the init watermark
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// adaptation is built on.
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uint minEncrypted = uint.MaxValue;
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uint maxSequence = 0;
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foreach (byte[] datagram in transport.Model.SentDatagrams)
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{
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PacketHeader header = PacketHeader.Unpack(datagram);
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if (header.HasFlag(PacketHeaderFlags.EncryptedChecksum)
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&& header.Sequence != 0
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&& header.Sequence < minEncrypted)
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{
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minEncrypted = header.Sequence;
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}
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maxSequence = SequenceMath.Max(maxSequence, header.Sequence);
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}
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Assert.Equal(2u, minEncrypted);
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// The tracker followed the whole stream: watermark == the
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// newest sequence ACE ever emitted, with an empty NAK set.
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Assert.Equal(
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maxSequence,
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session.Transport!.Inbound.HighestIdReceived);
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}
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finally
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{
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session.Dispose();
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}
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Assert.Equal(WorldSession.State.Disconnected, session.CurrentState);
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Assert.Equal(0, transport.Model.CrcDropCount);
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}
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/// <summary>
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/// The N2 win end-to-end: one lost S2C packet mid-stream (a Count=2
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/// fragment set spanning two packets — the model splits >448 B
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/// messages) no longer kills the inbound cipher. Later packets STILL
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/// DECODE, the missing id carries a parked key, and ACE's cached-shape
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/// late redelivery completes the fragment set intact.
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/// </summary>
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[Fact]
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// Lane=Timing: outcome depends on real elapsed time or OS scheduling.
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// Late-redelivery ordering under simulated loss. Failed 1/3 stress rounds.
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[Trait("Lane", "Timing")]
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public void S2CLoss_LaterPacketsStillDecode_LateRedeliveryCompletesTheMessage()
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{
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var transport = new FakeAceTransport();
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var session = new WorldSession(
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new IPEndPoint(IPAddress.Loopback, 9000),
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transport);
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try
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{
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session.Connect("testaccount", "testpassword", TimeSpan.FromSeconds(10));
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session.EnterWorld(0, TimeSpan.FromSeconds(10));
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var messages = new List<string>();
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session.ServerMessageReceived += m => messages.Add(m.Message);
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// A >448 B message splits into a Count=2 fragment set spanning
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// two S2C packets; the link eats the FIRST of them.
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string bigText = new string('x', 600);
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transport.Link.DropNext(LinkDirection.ServerToClient);
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transport.Model.EnqueueGameMessage(
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BuildServerMessage(bigText),
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GameMessageGroup.UIQueue);
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transport.PumpServer();
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PumpUntil(
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session,
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() => session.Transport!.Stats.KeysParked > 0);
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// The missing id is parked, the message can't complete yet.
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Assert.Equal(1, session.Transport!.Inbound.NakCount);
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Assert.Equal(1, session.Transport.Stats.KeysParked);
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Assert.Empty(messages);
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// THE WIN: traffic AFTER the loss still decodes (pre-N2 every
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// later encrypted packet failed checksum forever).
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transport.Model.EnqueueGameMessage(
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BuildServerMessage("after the loss"),
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GameMessageGroup.UIQueue);
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transport.PumpServer();
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PumpUntil(session, () => messages.Count > 0);
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Assert.Equal("after the loss", Assert.Single(messages));
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Assert.Equal(0, session.Transport.Stats.ChecksumFailures);
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// Late byte-identical redelivery of the dropped datagram (the
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// bytes ACE cached and would resend): decodes with the parked
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// key, completes the fragment set, dispatches intact.
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var parked = new List<uint>();
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session.Transport.Inbound.CopyNakkedSequencesAscending(parked);
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uint missingSequence = Assert.Single(parked);
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byte[]? droppedDatagram = null;
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foreach (byte[] datagram in transport.Model.SentDatagrams)
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{
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if (PacketHeader.Unpack(datagram).Sequence == missingSequence)
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{
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droppedDatagram = datagram;
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break;
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}
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}
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Assert.NotNull(droppedDatagram);
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transport.InjectServerDatagram(droppedDatagram!);
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PumpUntil(session, () => messages.Count > 1);
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Assert.Equal(2, messages.Count);
|
|
Assert.Equal(bigText, messages[1]);
|
|
Assert.Equal(0, session.Transport.Inbound.NakCount);
|
|
Assert.Equal(0, session.Transport.Stats.InboundDupsDropped);
|
|
Assert.Equal(0, session.Transport.Stats.ChecksumFailures);
|
|
}
|
|
finally
|
|
{
|
|
session.Dispose();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The double-dispatch bug closes: a duplicate delivery of an
|
|
/// already-processed server packet drops BEFORE dispatch, at zero
|
|
/// keystream cost.
|
|
/// </summary>
|
|
[Fact]
|
|
public void DuplicateServerPacket_DropsBeforeDispatch()
|
|
{
|
|
var transport = new FakeAceTransport();
|
|
var session = new WorldSession(
|
|
new IPEndPoint(IPAddress.Loopback, 9000),
|
|
transport);
|
|
try
|
|
{
|
|
session.Connect("testaccount", "testpassword", TimeSpan.FromSeconds(10));
|
|
session.EnterWorld(0, TimeSpan.FromSeconds(10));
|
|
|
|
var messages = new List<string>();
|
|
session.ServerMessageReceived += m => messages.Add(m.Message);
|
|
|
|
transport.Model.EnqueueGameMessage(
|
|
BuildServerMessage("once only"),
|
|
GameMessageGroup.UIQueue);
|
|
transport.PumpServer();
|
|
PumpUntil(session, () => messages.Count > 0);
|
|
Assert.Equal("once only", Assert.Single(messages));
|
|
|
|
// Redeliver the exact datagram that carried it.
|
|
byte[]? carrier = null;
|
|
foreach (byte[] datagram in transport.Model.SentDatagrams)
|
|
{
|
|
PacketHeader header = PacketHeader.Unpack(datagram);
|
|
if (header.HasFlag(PacketHeaderFlags.BlobFragments)
|
|
&& header.Sequence
|
|
== session.Transport!.Inbound.HighestIdReceived)
|
|
{
|
|
carrier = datagram;
|
|
}
|
|
}
|
|
|
|
Assert.NotNull(carrier);
|
|
transport.InjectServerDatagram(carrier!);
|
|
PumpUntil(
|
|
session,
|
|
() => session.Transport!.Stats.InboundDupsDropped > 0);
|
|
|
|
// Dropped before dispatch: the message did NOT arrive twice.
|
|
Assert.Single(messages);
|
|
Assert.Equal(1, session.Transport!.Stats.InboundDupsDropped);
|
|
|
|
// And the keystream did not move: fresh traffic still decodes.
|
|
transport.Model.EnqueueGameMessage(
|
|
BuildServerMessage("still aligned"),
|
|
GameMessageGroup.UIQueue);
|
|
transport.PumpServer();
|
|
PumpUntil(session, () => messages.Count > 1);
|
|
Assert.Equal("still aligned", messages[1]);
|
|
Assert.Equal(0, session.Transport.Stats.ChecksumFailures);
|
|
}
|
|
finally
|
|
{
|
|
session.Dispose();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sequence-0 packets bypass the tracker entirely: cleartext seq-0 is
|
|
/// handshake/control (processed, no watermark/NAK movement); encrypted
|
|
/// seq-0 drops before any keystream access.
|
|
/// </summary>
|
|
[Fact]
|
|
public void SequenceZero_CleartextBypassesTracker_EncryptedDrops()
|
|
{
|
|
var transport = new FakeAceTransport();
|
|
var session = new WorldSession(
|
|
new IPEndPoint(IPAddress.Loopback, 9000),
|
|
transport);
|
|
try
|
|
{
|
|
session.Connect("testaccount", "testpassword", TimeSpan.FromSeconds(10));
|
|
session.EnterWorld(0, TimeSpan.FromSeconds(10));
|
|
|
|
uint watermarkBefore = session.Transport!.Inbound.HighestIdReceived;
|
|
long parkedBefore = session.Transport.Stats.KeysParked;
|
|
|
|
var serverTimes = new List<double>();
|
|
session.ServerTimeUpdated += t => serverTimes.Add(t);
|
|
|
|
// A crafted cleartext seq-0 TimeSync control packet processes
|
|
// through the handshake/control path without touching the
|
|
// tracker.
|
|
byte[] timeSyncBody = new byte[8];
|
|
BinaryPrimitives.WriteInt64LittleEndian(
|
|
timeSyncBody,
|
|
BitConverter.DoubleToInt64Bits(777.5));
|
|
transport.InjectServerDatagram(PacketCodec.Encode(
|
|
new PacketHeader
|
|
{
|
|
Sequence = 0,
|
|
Flags = PacketHeaderFlags.TimeSync,
|
|
},
|
|
timeSyncBody,
|
|
outboundIsaac: null));
|
|
PumpUntil(session, () => serverTimes.Contains(777.5));
|
|
|
|
Assert.Equal(
|
|
watermarkBefore,
|
|
session.Transport.Inbound.HighestIdReceived);
|
|
Assert.Equal(0, session.Transport.Inbound.NakCount);
|
|
Assert.Equal(parkedBefore, session.Transport.Stats.KeysParked);
|
|
|
|
// An encrypted seq-0 packet does not exist on retail's wire:
|
|
// dropped before any keystream access — later traffic proves
|
|
// the wheel never moved.
|
|
var throwawayIsaac = MakeIsaac(0xDEADBEEFu);
|
|
transport.InjectServerDatagram(PacketCodec.Encode(
|
|
new PacketHeader
|
|
{
|
|
Sequence = 0,
|
|
Flags = PacketHeaderFlags.TimeSync
|
|
| PacketHeaderFlags.EncryptedChecksum,
|
|
},
|
|
timeSyncBody,
|
|
throwawayIsaac));
|
|
|
|
var messages = new List<string>();
|
|
session.ServerMessageReceived += m => messages.Add(m.Message);
|
|
transport.Model.EnqueueGameMessage(
|
|
BuildServerMessage("wheel intact"),
|
|
GameMessageGroup.UIQueue);
|
|
transport.PumpServer();
|
|
PumpUntil(session, () => messages.Count > 0);
|
|
Assert.Equal("wheel intact", Assert.Single(messages));
|
|
Assert.Equal(0, session.Transport.Stats.ChecksumFailures);
|
|
}
|
|
finally
|
|
{
|
|
session.Dispose();
|
|
}
|
|
}
|
|
|
|
// =====================================================================
|
|
// Fixture helpers
|
|
// =====================================================================
|
|
|
|
private static (InboundSequenceTracker Tracker, TransportStats Stats)
|
|
CreateTracker(uint initialWatermark)
|
|
{
|
|
var stats = new TransportStats();
|
|
return (
|
|
new InboundSequenceTracker(MakeIsaac(Seed), stats, initialWatermark),
|
|
stats);
|
|
}
|
|
|
|
/// <summary>Admit an encrypted packet that must NOT drop; returns the
|
|
/// verify key the tracker handed out.</summary>
|
|
private static uint Admitted(InboundSequenceTracker tracker, uint sequence)
|
|
{
|
|
InboundSequenceTracker.Admission admission =
|
|
tracker.Admit(sequence, encrypted: true);
|
|
Assert.False(admission.Drop);
|
|
Assert.NotNull(admission.VerifyKey);
|
|
return admission.VerifyKey!.Value;
|
|
}
|
|
|
|
private static void AssertNoInboundFaults(WorldSession session)
|
|
{
|
|
AcDream.Core.Net.Transport.ReliableTransport? transport = session.Transport;
|
|
Assert.NotNull(transport);
|
|
Assert.Equal(0, transport!.Inbound.NakCount);
|
|
Assert.Equal(0, transport.Stats.KeysParked);
|
|
Assert.Equal(0, transport.Stats.InboundDupsDropped);
|
|
Assert.Equal(0, transport.Stats.InboundSanityDrops);
|
|
Assert.Equal(0, transport.Stats.ChecksumFailures);
|
|
}
|
|
|
|
private static void PumpUntil(WorldSession session, Func<bool> condition)
|
|
{
|
|
DateTime deadline = DateTime.UtcNow.AddSeconds(10);
|
|
while (!condition() && DateTime.UtcNow < deadline)
|
|
{
|
|
session.Tick();
|
|
Thread.Sleep(5);
|
|
}
|
|
|
|
Assert.True(condition(), "condition not reached before the deadline");
|
|
}
|
|
|
|
private static byte[] BuildServerMessage(string text)
|
|
{
|
|
var writer = new PacketWriter(64 + text.Length);
|
|
writer.WriteUInt32(ServerMessage.Opcode); // 0xF7E0
|
|
writer.WriteString16L(text);
|
|
writer.WriteUInt32(1); // ChatMessageType
|
|
return writer.ToArray();
|
|
}
|
|
|
|
private static IsaacRandom MakeIsaac(uint seed)
|
|
{
|
|
Span<byte> seedBytes = stackalloc byte[4];
|
|
BinaryPrimitives.WriteUInt32LittleEndian(seedBytes, seed);
|
|
return new IsaacRandom(seedBytes);
|
|
}
|
|
}
|