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feat(rdp): printer redirection, saved as PostScript

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An optional 'Nexus Terminal' printer (IronRDP's PostScript driver
announce) appears on the remote desktop; each job is written to
'Nexus print <time>.ps' in Downloads, with a toast saying where. Jobs
are capped at 256 MiB and empty jobs leave no file. The shared drive and
the printer now share one RDPDR backend (rdp_devices); the printer
works on every platform, the drive on Linux and macOS.

Tested with a unit test driving create/write/close; xrdp has no printer
redirection, so not exercised against a server.
This commit is contained in:
Andy Dixon
2026-10-12 18:14:31 +01:00
parent b798422735
commit 2fa56e0723
11 changed files with 354 additions and 139 deletions
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docs/user-manual.md
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@@ -167,7 +167,7 @@ Use SSH tunnelling for VNC whenever possible. If a VNC profile has no tunnel, Ne
- **RDP**: domain (optional), password storage mode, **Certificate Policy** and **Allow servers without NLA**. The username, host and port (3389) are the profile's own.
- **Display**: **Scale to Fit**, a fixed **Width** and **Height** (0 × 0 fits the tab) and **Resize With Tab**.
- **Proxy**: **SOCKS5** or **HTTP CONNECT**, with an optional username and password.
- **Devices**: **Play Remote Audio**, and on Linux and macOS a **Shared Folder** that appears on the remote desktop as a drive named Nexus. The server can read and change everything in that folder and nothing outside it: paths that try to leave it (`..`, or symlinks pointing elsewhere) are refused.
- **Devices**: **Play Remote Audio**; **Redirect Printer**, which adds a *Nexus Terminal* printer on the remote desktop whose jobs are saved as PostScript files in your Downloads folder (up to 256 MiB per job); and on Linux and macOS a **Shared Folder** that appears on the remote desktop as a drive named Nexus. The server can read and change everything in that folder and nothing outside it: paths that try to leave it (`..`, or symlinks pointing elsewhere) are refused.
- **SSH Tunnel**: carry RDP through SSH, as for VNC. Use either a proxy or a tunnel, not both.
Nexus Terminal logs on with Network Level Authentication (CredSSP, NTLM), so your password is checked before a session is set up. Servers without NLA, such as xrdp, need **Allow servers without NLA**; the password is then passed to the server's own logon. Kerberos and smart cards are not supported.