5 Commits

Include renames

Author	SHA1	Message	Date
enricobuehlerandClaude Fable 5	02a5bdb965	fix(gamepad): the virtual DualSense stops demanding a firmware update it cannot take ... The emulated pad's firmware-info feature report (0x20) advertised update version 0x0154 — a 2021-era number. PlayStation Accessories compares it against Sony's latest (0x0630 as of 2026-08) and offers an Update that can only end in "can't complete the update", since the virtual pad speaks no DFU; libScePad titles (Stellar Blade) surface the same nag in-game. A real pad plugged in directly reads up to date, which made the prompt look like punktfunk corrupting the controller. The old value was chosen to keep the kernel and SDL on the flag0 COMPATIBLE_VIBRATION convention, but parse_ds_output has since learned the firmware-≥2.24 COMPATIBLE_VIBRATION2 flag as well, so nothing depends on looking old anymore. Advertise 0x0999 — above anything Sony has shipped and comfortably ahead of their ~yearly cadence — instead of chasing their exact latest, which would resurrect the prompt on every Sony release. Writers that read the version now use the v2 flag; both conventions land in the same rumble plane. Bumped in both copies of the blob (host uhid + Windows driver); the DualSense Edge shares them, and its own versioning (0x0217 latest) sits below the new value too. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-08-01 10:24:20 +02:00
enricobuehlerandClaude Fable 5	15361b0091	fix(drivers/gamepad): drop the 1 s enumeration wait its own premise doomed, and gate the logger ... The PnP-identity fix established that the sealed channel is STRUCTURALLY unavailable while hidclass enumerates (the DATA section arrives over the HID interface those very queries create) — so device_type()'s bounded 1 s pump loop, reachable only for a devnode whose hardware ids matched nothing, could never succeed there: it burned a second of a WUDFHost dispatch thread mid-enumeration and then fell back to LAST_DEVTYPE anyway. The fallback chain is now wait-free (attached section → PnP identity → LAST_DEVTYPE), and the 8 ms timer refreshes LAST_DEVTYPE whenever the section is attached, so the last resort is always current. The logger also joins its siblings behind file_log_enabled(): a RELEASE driver without the opt-in no longer OutputDebugStringA's (+ CString + format! allocs) per logged event — the rumble OUTPUT hex dumps and the cyclic GET_STRING polls were sustained paths. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-07-31 00:59:50 +02:00
enricobuehler	00c29f82f2	fix(gamepad/windows): a pad enumerates as the controller it IS, not always a DualSense ... A Steam Deck client streaming to a Windows host had a stuck stick and a stuck d-pad. The virtual pad was enumerating with the DualSense VID/PID **and the DualSense report descriptor**, so Windows parsed the 64-byte Deck frame as DualSense report 0x01: LX = report[1] = 0x00 (stick hard left), LY = report[2] = 0x09 (hard up), and a d-pad hat of 0 — which is UP, held forever. The driver picked its identity from `device_type` in the sealed section, but hidclass asks for the descriptors and attributes while it STARTS the device, and the section can only be delivered over the HID device interface — which does not exist until those queries are answered. The channel was structurally unavailable at the only moment it was needed, so `device_type()`'s bounded wait always timed out and every identity fell back to DualSense. Not a race: DualShock 4 and the Edge enumerated as DualSenses too (verified on .173 — both report 054C:0CE6 with a 64-byte DualSense input report, while their on-demand strings read correctly). The devnode's own hardware ids carry the identity and are readable at EvtDeviceAdd, before anything is asked, so resolve it there. The section stays authoritative once attached; the old wait survives only for a devnode whose ids match nothing. `hwid_devtype_table_matches_the_driver` pins the host's hwid → device_type mapping against the driver's table, including the ordering trap that `pf_dualsense` is a prefix of `pf_dualsenseedge`.	2026-07-30 23:40:35 +02:00
enricobuehlerandClaude Fable 5	e90c5d5bcd	fix(gamepad): the output-report ring absorbs haptics-rate writers (PadShm v2.2) ... A field log (2026-07-30) showed a game driving the virtual DualSense's output endpoint at >2 kHz sustained for tens of seconds. The 8-slot ring — sized on the assumption that 2 kHz is double any real HID output rate — overflowed every 4 ms poll, which force-silenced rumble for each storm's whole duration and flooded the log at ~230 WARN lines/s (96 % of the user's 5000-line web-console export, evicting the session history it was needed to diagnose). Three legs, negotiated so every old/new host×driver pairing keeps working: - pf-driver-proto: the ring grows in place 8 -> 56 slots; PadShm becomes exactly one page (4096 B), the hard ceiling that keeps cross-generation section views mappable. A new out_ring_len field carries the driver's side of the length negotiation. Deliberately NOT a GAMEPAD_PROTO_VERSION bump (that fails closed - no pad at all). - pf-gamepad driver: picks its ring length from the host's out_ring_ver stamp (>= 2 + a full-size map -> 56) and echoes it before every ring_head bump (now a Release store), so an Acquire-observing drain always reads the modulo that indexed the slots it copies. - host drain: follows the echo (0 = old driver = 8); on genuine overflow it now salvages the legacy latest-report slot - the freshest coalesced state - instead of total silence, and the per-poll overflow WARN is rate-limited to 1 line/s per pad with a suppressed count. Verified on the Windows CI runner (drivers workspace build + clippy -D warnings against the WDK; 64 pf-inject tests incl. the new negotiation/ salvage/limiter tests; pf-inject clippy -D warnings) and on Linux via the CI docker image (82 pf-inject tests). DriverVer needs no manual bump - the installer stamps a strictly-increasing build timestamp per release. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>	2026-07-30 18:36:47 +02:00
enricobuehlerandClaude Opus 5	560e663aef	fix(drivers): the pad channel asks the devnode who to trust, not the mailbox ... A LocalService principal could take over a virtual pad's shared input section and forge HID input into the interactive desktop. The host duplicates each pad's unnamed DATA section into the driver's WUDFHost, and through gamepad proto v2 it learned that process from `driver_pid` in the named bootstrap mailbox. That mailbox has to be LocalService-writable — that is what the driver's own WUDFHost runs as — and the delivery gate, verify_is_wudfhost, only checks that the target's IMAGE is %SystemRoot%\System32\WUDFHost.exe. That image is world-executable. So anything running as LocalService — notably the deliberately de-privileged plugin runner — could spawn its own WUDFHost (CREATE_SUSPENDED parks it indefinitely with the right image path), publish that pid, and be handed SECTION_MAP_READ|WRITE on a live section. For pf-mouse that section drives a real absolute pointer, so it was desktop control; for the pads it was forged gamepad input plus a read of the remote user's controller state. The module docs claimed mailbox tampering "yields at worst a gamepad DoS, never a read or an injection". That was wrong, and the reasoning behind it — that a LocalService token is DACL-denied OpenProcess on a UMDF WUDFHost — only covers the REAL host, not one the attacker spawned itself. The pid now comes from the device stack (ChannelProof, proto 2 -> 3). The host asks the devnode it SwDeviceCreate'd who is serving it, looked up by the instance id PnP handed back, so a planted look-alike devnode is not a candidate and the kernel — not anything the attacker supplies — does the routing. Only the driver PnP actually bound to that device can answer. `driver_pid` survives as a liveness hint; a tamperer can still deny a pad, which squatting the name always allowed, but can no longer choose the recipient. Two rules keep the state machine honest around it: a delivery stands until its target process EXITS (judged on a retained SYNCHRONIZE handle, so a recycled pid cannot fake it, and UMDF's restart-after-driver-crash still re-attaches), and a pad with no SwDeviceCreate devnode refuses to deliver rather than fall back — unless an operator sets PUNKTFUNK_PAD_CHANNEL_TRUST_MAILBOX, which says so loudly. Three transports, because Windows carries different things to different driver shapes, and the obvious two did not survive contact with hidclass. Measured on .173 (Win11 26200): HidD_GetIndexedString is NOT forwarded to a UMDF HID minidriver at all — it failed for every index including ones the driver demonstrably serves through the named wrappers; and a private device interface registers and enumerates but cannot be OPENED (ERROR_GEN_FAILURE), because hidclass owns IRP_MJ_CREATE on a devnode it is the FDO for. That is exactly why pf-xusb was never affected: it is not a HID minidriver, so nothing sits above it. What works: * pf-xusb — a private IOCTL on its own GUID_DEVINTERFACE_XUSB. * pf-mouse — the HID serial string. Verified: PFCP:3:0:7296, and 7296 was a genuine service-spawned WUDFHost.exe. Safe here alone: nothing reads the virtual mouse's serial, whereas a pad's is SDL/Steam dedup material. * pf-gamepad — a HID feature report, and it cost NO report-descriptor change. The captured descriptors already declare far more Feature ids than the driver ever served: 0x85 is declared on DualSense, DualShock 4 and Edge alike and used to fail with STATUS_INVALID_PARAMETER, so hidclass lets it through and nothing can have depended on the old failure. The Deck's one feature report is unnumbered and Steam drives it command->response, so its proof rides that existing contract via a private two-byte command. Verified: feature 0x85 returned magic "PFCP", proto 3, pad_index 0, wudf_pid 18456 — and 18456 was a WUDFHost — with the product string still 'DualSense Wireless Controller'. Also renamed pf-dualsense -> pf-gamepad. One driver has always served four identities, so the old name read as if the other three lived elsewhere. ONLY the package identity moved (crate, INF/CAT/DLL, UMDF service, build script, CI lines, log file, env var). The four HARDWARE IDS are deliberately unchanged — they bind every devnode the host creates and every installed system — as are the Global\pfds-boot-<i> mailbox and PAD_MAGIC, which are wire contract. `driver install --gamepad` now retires the pre-rename store package first, matched on pf_dualsense.dll because that string appears only in the OLD inf; matching on the hardware ids would delete what we are about to install. On .173 that separated 14 stale packages from the 1 new one with 0 ambiguous, and the renamed package binds the old hwid (devgen root\pf_dualsense -> oem143.inf = pf_gamepad.inf). The repo's own pre-commit/pre-push rustfmt hooks named the old crate, so they caught the rename before the commit did — they now check pf-gamepad, and pf-mouse alongside it, which they had been missing relative to the CI line. Host and drivers MUST ship together: v2<->v3 fails closed in both directions by design, with the existing "update host + drivers together" diagnostic. The rename moved files that also carry the security change, so splitting this into two commits would mean reconstructing an intermediate state that was never gated. It is one commit on purpose. Gated on the windows-amd64 runner with cargo clean first (the box's clock lags, so stale artifacts would read as a vacuous green): clippy -D warnings clean for pf-inject, pf-capture and pf-driver-proto, drivers workspace build + the CI clippy line clean, cargo check --release -p punktfunk-host clean, 19 + 58 tests green. Also fixes pf-mouse still writing its debug log to world-writable C:\Users\Public, which the 2026-07-17 review moved for the other three drivers and missed here. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>	2026-07-28 16:54:40 +02:00