Commit Graph

9 Commits

Author SHA1 Message Date
Jason A. Donenfeld
7964694e1e api: elevate only when needed for system operations
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-10-31 10:41:49 +01:00
Simon Rozman
eeb42a5f12 api: make #ifdef-s more descriptive
Suggested-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-31 10:41:48 +01:00
Simon Rozman
faf7d3771c api: connect rundll32 child with parent using stdout and stderr
The WintunCreateAdapter()+CreateAdapter() and WintunDeleteAdapter()+
DeleteAdapter() communicate using Unicode anonymous pipes now. This
allows the WintunCreateAdapter() to exactly determine the adapter
CreateAdapter() just created by its GUID rather than its name - avoiding
the possible ambiguity caused by same-adapter-name ordinal suffixes.
This also allows exact retrieval of the result code and pending reboot
flag from the rundll32 child process.

Furthermore, CreateAdapter() and DeleteAdapter() are now available in
_DEBUG for all platforms to allow testing. It took a #pragma comment(
linker, "/EXPORT") trick to stop compiler from decorating function names
and exporting as _CreateAdapter@16() and _DeleteAdapter@16() in x86.

Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:01 +01:00
Simon Rozman
0fdd9fbb85 api: use standard C void
Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:01 +01:00
Simon Rozman
c049a8f853 api: make logger callback return a dummy value
Go supports only callbacks that return "something" of a size up to
uintptr. It panics on void-returning callbacks.

Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:01 +01:00
Simon Rozman
2d20564f0a api: redirect log to stderr in rundll32 invocations
The WoW64 client will provide stdio handles to read the log messages.
Furthermore, the rundll32 calls could return results using stdout.

Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:00 +01:00
Simon Rozman
8bfe692c97 api: arrange rundll32 a console logger
Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:00 +01:00
Simon Rozman
369801cdfa api: elevate rundll32 calls to SYSTEM
I need this for debugging. In production environment, WoW64 clients will
already call rundll32 elevated to SYSTEM.

Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:00 +01:00
Simon Rozman
5925f914e4 api: add support for WoW64
Some functions of SetupAPI only work when invoked from a native process.
Registry and filesystem reflection makes them fail on WoW64. For WoW64
processes, a minimum set of rundll32 functions are provided.

Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:50:59 +01:00