[Bug 60201] New: Implement SIO_AF_UNIX_GETPEERPID ioctl

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60201

            Bug ID: 60201
           Summary: Implement SIO_AF_UNIX_GETPEERPID ioctl
           Product: Wine
           Version: 11.10
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: winsock
          Assignee: [e-mail]
          Reporter: [e-mail]
  Target Milestone: ---
      Distribution: ---

Windows allows programs to retrieve the PID of the other side connected to a
Unix-domain socket with the SIO_AF_UNIX_GETPEERPID socket ioctl. This is
roughly equivalent to getsockopt(SO_PEERCRED) on Unix. It'd be nice to see this
ioctl implemented.

I'm not exactly sure how this option behaves if the socket is transferred to
another process, but as far as I can tell, Linux retains the old PID, and I'd
assume Windows behaves similarly, since otherwise there is no correct answer if
a socket handle is open in two processes at the same time.

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[Bug 60201] Implement SIO_AF_UNIX_GETPEERPID ioctl

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60201

Zeb Figura <[e-mail]> changed:

           What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #1 from Zeb Figura <[e-mail]> ---
What needs this?

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[Bug 60201] Implement SIO_AF_UNIX_GETPEERPID ioctl

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60201

--- Comment #2 from Alisa Sireneva <[e-mail]> ---
It's mostly used by userland socketpair() implementations, since Windows offers
no native socketpair() or abstract unix-domain sockets, and thus sockets have
to be tied to filesystem paths that can be raced.

Ocaml uses it
(https://github.com/ocaml/ocaml/blob/7ed5cf7f8e9d236e1650ac8418f88174523b15df...),
qemu uses it too
(https://github.com/qemu/qemu/blob/ae4f3443209ab154b48b706a146e5f557ab147cb/u...)
though I guess it's not something you want to run under Wine. I also want to
use it in an IPC library. The popularity here is a little hard to measure,
since most of the uses are transitive; all I know is that someone bothered to
implement it and googling "socketpair on Windows" mostly yields snippets that
are either insecure or use SIO_AF_UNIX_GETPEERPID.

There are also some other uses, e.g. dbus seemingly uses it for security
(https://dbus.freedesktop.org/doc/api/html/dbus-sysdeps-win_8c_source.html),
and glib exposes the API
(https://github.com/winlibs/glib/blob/ca9d6adf53e11099045a6d51116dd0b678faa1f...)
and it may be transitively used by PHP, but I'm not sure.

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[Bug 60201] Implement SIO_AF_UNIX_GETPEERPID ioctl

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60201

Ken Sharp <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |download, source

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