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ModernUO/Projects/Server
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Kamron Batman ee600d02ac
fix(network): stop silently dropping packets when the send buffer is full 
NetState.Send had three failure modes once the send buffer filled, none of
them visible:

  - No writable space: GetSendBuffer returned false and the packet was
    dropped with no log and no disconnect. The client stayed connected
    while quietly missing game state.

  - Some space but not enough: NetworkCompression.Compress hit its guard
    and returned 0, so CommitWrite(0) ran and the packet was dropped the
    same way.

  - One to three bytes writable: Compress computes
    safeOutputLength = (nuint)output.Length - 4, which underflows for
    those sizes. The hot loop's bounds check never trips and it writes
    past the span, corrupting the in-flight region of the ring buffer.
    Reachable because callers only check for non-zero space.

Compress now refuses an output too small to bound, and Send reports
exhaustion instead of dropping: it logs and disconnects with the bytes
needed, writable, awaiting acknowledgement, and total capacity. Those
numbers separate a slow client holding the buffer from a buffer genuinely
too small for the shard, which is the case that warrants raising
network.sendBufferSize.

Tests cover the underflow via sentinel bytes around the output window and
were confirmed to fail without the guard.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-27 22:55:37 -07:00
..
Buffers feat(buffers): add :L lowercase format spec to RawInterpolatedStringHandler (#2440) 2026-05-03 18:24:57 -07:00
Client feat: Add zero-alloc interpolation handler to ValueStringBuilder, replace all StringBuilder usage (#2387) 2026-03-22 14:23:44 -07:00
Collections feat(network): pluggable connection filters; file blocklist + contribute-first CrowdSec (#2542) 2026-07-25 11:59:37 -07:00
Comparers fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Compression feat(pathfinding): .swb format v8 compact index (#3b) (#2471) 2026-06-07 01:22:20 -07:00
Configuration fix(console): stop headless servers from pegging a CPU core (#2535) 2026-07-16 18:52:43 -07:00
Console fix(console): stop headless servers from pegging a CPU core (#2535) 2026-07-16 18:52:43 -07:00
ContextMenus fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Events fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Exceptions fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
GarbageCollection chore: Use var everywhere (#2294) 2025-12-27 16:47:28 -08:00
Geometry fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Items fix: Streamlines insurance. Insurance only executes when enabled. (#2550) 2026-07-26 09:47:49 -07:00
Json fix(json): Rectangle3DConverter loses a z-level on write (#2506) 2026-06-25 23:42:49 -07:00
Localization feat: Add zero-alloc interpolation handler to ValueStringBuilder, replace all StringBuilder usage (#2387) 2026-03-22 14:23:44 -07:00
Maps fix: Fixes pathfinding prebake and pathfinding multi-fallthrough. (#2478) 2026-06-08 11:59:24 -07:00
Menus feat: Pre-Publish 14 Crafting (supersedes #2181, #2381) (#2476) 2026-06-07 20:27:22 -07:00
Migrations refactor: decompose mobile/corpse hair, delete VirtualHairInfo, fix removal serial (#2462) (#2463) 2026-06-06 14:33:28 -07:00
Mobiles fix: Streamlines insurance. Insurance only executes when enabled. (#2550) 2026-07-26 09:47:49 -07:00
Network fix(network): stop silently dropping packets when the send buffer is full 2026-07-27 22:55:37 -07:00
PropertyList fix(opl): only apply the ':#' cliloc marker to integer values (#2540) 2026-07-19 10:49:16 -07:00
Random fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Regions fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Serialization perf(saves): eliminate world-save freeze bottlenecks (~9.5x faster freeze) (#2525) 2026-07-16 22:53:28 -07:00
Targeting chore: Use var everywhere (#2294) 2025-12-27 16:47:28 -08:00
Text feat: Add zero-alloc interpolation handler to ValueStringBuilder, replace all StringBuilder usage (#2387) 2026-03-22 14:23:44 -07:00
TileMatrix feat(pathfinding): JSONL recorder + public bake helpers (#2449) 2026-05-06 13:06:28 -07:00
Timer feat: Adds dynamic thread idle to address CPU usage (#2370) 2026-03-13 23:53:49 -07:00
TimeZones fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Utilities feat(network): pluggable connection filters; file blocklist + contribute-first CrowdSec (#2542) 2026-07-25 11:59:37 -07:00
World perf(saves): eliminate world-save freeze bottlenecks (~9.5x faster freeze) (#2525) 2026-07-16 22:53:28 -07:00
AssemblyHandler.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Attributes.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
CityInfo.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Commands.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Effects.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
EntityFinalizationTracker.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
EventLoopTasks.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
ExpansionInfo.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
FeatureFlags.cs fix: Streamlines insurance. Insurance only executes when enabled. (#2550) 2026-07-26 09:47:49 -07:00
Guild.cs perf(saves): eliminate world-save freeze bottlenecks (~9.5x faster freeze) (#2525) 2026-07-16 22:53:28 -07:00
HuePicker.cs fix: Cleans up core code (#1187) 2022-10-10 21:47:08 -07:00
IAccount.cs fix: Fixes looking up accounts that were renamed. (#2078) 2025-01-18 17:11:43 -08:00
IEntity.cs perf(saves): eliminate world-save freeze bottlenecks (~9.5x faster freeze) (#2525) 2026-07-16 22:53:28 -07:00
Interfaces.cs feat: Add CanSpawnMobile overload with props Z-range support. (#2293) 2025-12-27 17:01:15 -08:00
IVirtualCheckGump.cs feat: Moves gumps out of the core (#1916) 2024-08-09 19:07:32 -07:00
KeywordList.cs fix: Cleans up core code (#1187) 2022-10-10 21:47:08 -07:00
Main.cs feat(network): pluggable connection filters; file blocklist + contribute-first CrowdSec (#2542) 2026-07-25 11:59:37 -07:00
MessageType.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Module.cs fix: Fixes sending packets and sidesteps a major issue with stackalloc and PGO in .NET 8 (#1607) 2023-11-21 12:18:20 -08:00
Party.cs fix: Cleans up core code (#1187) 2022-10-10 21:47:08 -07:00
Poison.cs feat: Refactor Poison system, implement Darkglow & Parasitic effects (#2385) 2026-03-21 21:27:22 -07:00
Prompt.cs fix: Cleans up core code (#1187) 2022-10-10 21:47:08 -07:00
Race.cs fix: Fixes TryParse for Race (#1244) 2022-11-12 00:31:25 -08:00
SecureTrade.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Serial.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
Server.csproj feat(network): consume IORingGroup 1.0.8 and expose send tuning 2026-07-27 22:55:22 -07:00
Skills.cs chore: Use var everywhere (#2294) 2025-12-27 16:47:28 -08:00
TileData.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
TileList.cs fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00