Swmarly Valheim Networking

Unified server-first Valheim networking and performance tuning.

Features

• Adaptive per-peer send budgets and queue recovery
• Fixed-rate all-peer synchronization
• Zstandard compression with vanilla-peer fallback
• Dirty-set synchronization, relay throttling, and Top-K selection
• Receive caps and persistent diagnostics
• Steam send-rate, buffer, and low-latency tuning
• Dedicated-server frame, save, GC, WearNTear, and ownership tuning
• Optional client send budget, shared map, interpolation, and prediction
• Floating item/log diagnostics and cleanup

Installation

Install SwmarlyValheimNetworking.dll and its bundled managed dependencies on the dedicated server under BepInEx/plugins/SwmarlyValheimNetworking/. Vanilla clients can join by default.

Remove SmoothServer, ValheimTune, FiresGhettoNetworking, BetterNetworking, ServerSideMap, and Serverside Simulations before enabling this package. Those mods patch overlapping Valheim networking/map methods.

Target build: Valheim 1.0.7 / network version 39 / BepInEx 5.4.2350.

Changelog — Swmarly Valheim Networking

0.1.9 — forward-compatible runtime validation

• Compatible Valheim hotfixes and minor updates can remain active when the validated runtime surface is unchanged.
• Fundamental method, field, signature, Steam API, or asserted-IL changes still fail closed.
• KnownGoodBuilds remains an explicit verification record rather than the only activation gate.

0.1.8 — Valheim 1.0.12 runtime compatibility

• Recognize Valheim 1.0.12 Version.c_networkVersion and network version 40.
• Validate the verified bool ZDOMan.SendZDOs(ZDOPeer, bool) signature.
• Keep client-only ZSyncTransform.SyncPosition IL checks out of dedicated-server preflight.
• Preserve the explicit known-build allow-list and fail-closed behavior.

0.1.7 — release version correction

• Corrected the plugin, project, and Thunderstore package version to 0.1.7.
• No networking behavior or compatibility policy changed in this version.

0.1.4 — TargetPortal compatibility

• Automatically keeps vanilla ZDO sync-list handling when TargetPortal is loaded, preserving TargetPortal's forced portal advertisements and correct player removal after portal travel.
• The remaining networking, queue, compression, and performance modules stay enabled.

0.1.3 — portal sync fix

• Preserve vanilla invalid-sector removal when dirty-set synchronization drops a known ZDO outside a peer's active area, preventing players from remaining visible at their old portal.

0.1.2 — safer defaults

• Shared server-side map synchronization is now disabled by default.
• The optional map self-test is also disabled by default.

0.1.1 — compatibility and safety pass

• Fail closed on unknown game builds and detected overlapping networking/map mods.
• Added live module enable/disable lifecycle handling.
• Hardened compression handshakes, malformed-frame handling, shared-map validation, and map saves.
• Fixed package license notices and updated the BepInEx dependency to 5.4.2350.

0.1.0 — Valheim 1.0.7 / network version 39

• Initial unified release for Valheim 1.0.7.
• One BepInEx plugin identity combining the compatible transport, synchronization, server-performance, and client-smoothing features selected from SmoothServer, ValheimTune, and FiresGhettoNetworking.
• Safe compatibility gate: unsupported game builds leave replacement patches inactive instead of continuing against unknown method layouts.
• Vanilla clients remain supported by default; shared compression activates only after a safe per-peer handshake.