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>

1 files changed, 3 insertions, 1 deletions

diff --git a/api/wintun.h b/api/wintun.h
index 0917a6c..dadac10 100644
--- a/api/wintun.h
+++ b/api/wintun.h
@@ -206,6 +206,8 @@ typedef BOOL(CALLBACK *WINTUN_LOGGER_FUNC)(_In_ WINTUN_LOGGER_LEVEL Level, _In_z
 /**
  * Sets logger callback function.
  *
- * @param NewLogger     Pointer to callback function to use as a new global logger.
+ * @param NewLogger     Pointer to callback function to use as a new global logger. NewLogger may be called from various
+ *                      threads concurrently. Should the logging require serialization, you must handle serialization in
+ *                      NewLogger.
  */
 typedef void(WINAPI *WINTUN_SET_LOGGER_FUNC)(_In_ WINTUN_LOGGER_FUNC NewLogger);