feat(rdpeusb): implement urbdrc server processors

[uchouT (uchouT)]

Part of #1138

• Implement control and per-device urbdrc server processors, similar to the urbdrc client, maintaining a request_id -> pending_io at the state machine layer.
• introduce backend-facing rdpeusb::io request and completion types shared by client and server implementations.
• Refactor TsUrb variants, the rationale is documented in the 0d3d553 commit message.
• As a follow-up to feat(rdpeusb): implement urbdrc client #1365, handle no-ack OUT transfers through a dedicated client backend method.

Note

Types in rdpeusb::io define a system boundary, worth good design.

cc Marc-Andre Lureau (@elmarco)

[Marc-Andre Lureau (elmarco)]

lgtm, it could use more doc comments and tests, but I suppose this will come next.

How to trigger copilot checks? Benoît Cortier (@CBenoit)

[Benoît Cortier (CBenoit)]

I’m sorry, I need to trigger it manually for now, but I’m discussing internally about having them automatically

[Copilot]

Pull request overview

This PR adds the server-side RDPEUSB (URBDRC) protocol processors to ironrdp-rdpeusb, introduces a backend-facing rdpeusb::io data model shared by client/server, and refactors TS_URB representations to better separate headers from payload variants.

Changes:

• Implement UrbdrcControlServer and UrbdrcDeviceServer state machines with request tracking (request_id -> pending_io) and completion dispatching.
• Introduce crates/ironrdp-rdpeusb::io as a backend boundary for requests/completions used by both client and server.
• Refactor TS_URB types and related PDU utilities, plus adjust testsuite imports and the client backend trait to support no-ack OUT transfers.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
crates/ironrdp-testsuite-core/tests/rdpeusb/mod.rs	Update testsuite imports to new rdpeusb::io::device types.
crates/ironrdp-testsuite-core/tests/rdpeusb/device.rs	Switch device test helpers to rdpeusb::io::device module.
crates/ironrdp-testsuite-core/tests/rdpeusb/client.rs	Align test backend with new io::* request/completion types and no-ack OUT API.
crates/ironrdp-rdpeusb/src/lib.rs	Export new io module and server module.
crates/ironrdp-rdpeusb/src/io/mod.rs	Add shared backend-facing request/completion types and server IO request wrapper.
crates/ironrdp-rdpeusb/src/io/device.rs	Document and expose backend-neutral USB device descriptor/config information.
crates/ironrdp-rdpeusb/src/client.rs	Refactor client backend boundary to use io::* types; add no-ack OUT handler.
crates/ironrdp-rdpeusb/src/server.rs	New URBDRC server control/device processors with pending-IO tracking and completion routing.
crates/ironrdp-rdpeusb/src/pdu/utils.rs	Improve decode error typing for transfer request IDs.
crates/ironrdp-rdpeusb/src/pdu/completion/mod.rs	Adopt new RequestIdTransferInOut decode error type usage.
crates/ironrdp-rdpeusb/src/pdu/iface_manipulation.rs	Add DvcEncode impl for InterfaceRelease to support DVC message dispatch.
crates/ironrdp-rdpeusb/src/pdu/usb_dev/mod.rs	Update TS_URB access patterns and add DvcEncode impl for IoControl.
crates/ironrdp-rdpeusb/src/pdu/usb_dev/ts_urb/utils.rs	Update TS_URB utility imports and make TsUrbHeader Copy.
crates/ironrdp-rdpeusb/src/pdu/usb_dev/ts_urb/mod.rs	Refactor TS_URB in/out into {header, kind} structs and separate *Kind enums.

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