SF4 Netplay Launcher v0.4.8

SF4 Netplay Launcher v0.4.8

Client stability hotfix for the GGPO Assertion Failed dialog that could appear immediately after both players received SF4R.

Install

1. Download sf4-netplay-launcher-*-0.4.8.zip from Releases.
2. Extract the full zip to a new folder.
3. Run preflight.cmd, then Launcher.exe.
4. Confirm both players show v0.4.8 and host a fresh room.

Both players must use the same release. Do not copy only Sidecar.dll or mix v0.4.8 with an older GGPO.dll.

Fixes

• Rejects late SF4R/SF4W relay control replies before GGPO parses them as game packets.
• Rejects short, unknown-type, truncated, and oversized GGPO UDP messages before logging or dispatch.
• Prevents untrusted UDP input from opening GGPO assertion dialogs.
• Preserves valid GGPO synchronization traffic and the v0.4.7 match-generation/rematch protocol.

Verification

• Native loopback regression coverage injects the exact SF4R@ failure pattern plus short and malformed GGPO packets.
• The same test sends a valid GGPO sync request afterward and requires a valid sync reply.
• VPS transport regression remains unchanged because this is a client receive-boundary fix; no relay redeployment is required.