wintun/api, branch sr/api-improvements

Allow packet over-allocation on send

2021-04-13T21:56:04Z

Should client desire to prepare packets for Wintun inside the ring memory (e.g. to reduce memory copying), the final sending packet size is not always known at the WintunAllocateSendPacket() time. This commit modifies Wintun to calculate the packet size on delivery to NDIS. The packet size is derived from IPv4/IPv6 packet header. Signed-off-by: Simon Rozman

Allow optional padding before and after layer 3 packets

2021-04-13T21:56:04Z

To avoid additional packet memory allocation and copy when sending or receiving packets, this commit introduces additional available space before and after layer 3 IPv4 or IPv6 packet in the Wintun rings. Wintun will ignore data in those areas. Requested-by: David Woodhouse Signed-off-by: Simon Rozman

api: log Windows error message too when creating folder or file fails

2021-04-13T21:50:50Z

Signed-off-by: Simon Rozman

api: fix fallback log line printf template

2021-04-10T11:37:22Z

Signed-off-by: Simon Rozman

Fix © in resources

2021-03-19T11:04:23Z

The \xa9 is © on Windows-125x code pages. When Wintun was compiled on a Windows computer using UTF-8 as default code page (for "non-Unicode" programs), the Copyright notice in resources was wrong. Signed-off-by: Simon Rozman

project: add support for intermediate versioning

2021-03-19T10:52:11Z

While the Wintun driver is typically released only at . milestones, the wintun.dll did see some intermediate releases. To make MSI logic correctly decide to upgrade local wintun.dll file, the version inscribed in wintun.dll file resources should increment in those intermediate releases. MSI ignores file timestamps. One could use REINSTALLMODE=emus Installer property to force copying wintun.dll when its version doesn't change. But REINSTALLMODE applies to all files in the MSI session and would be an additional requirement when authoring MSI packages with wintun.dll. Bumping only the final ZIP filename version is not sufficient. Therefore, a . or .. versioning is introduced. Furthermore, we no longer distinguish between WintunVersion and WintunVersionStr. All our releases used strictly numeric . notation, making WintunVersion and WintunVersionStr always the same. When the driver didn't change, just bump the version in wintun.proj and run `msbuild wintun.proj /t:Zip` to rebuild the wintun.dll and make the new ZIP file. Signed-off-by: Simon Rozman

api: make .h filenames lowercase for building with MinGW on Linux

2021-03-16T09:11:00Z

MinGW supplies all Windows header files using lowercase filenames. This makes some of the #include lines in wintun.h fail to resolve the .h files correctly on a case-sensitive filesystem. Signed-off-by: Simon Rozman

api: elevate to SYSTEM in WintunEnumAdapters()

2021-03-08T12:48:29Z

The WintunEnumAdapters() requires namespace mutex. However, NamespaceTakePoolMutex() works as SYSTEM user only. WireGuard is using the WintunEnumAdapters() in its manager service to cleanup stale adapters. As the WireGuard manager service is running as SYSTEM, this requirement was not apparent before. This commit also extends the example project to list its existing adapters at start. Signed-off-by: Simon Rozman

api: upgrade logging

2021-02-16T03:19:21Z

Log runtime information to quickly check whether the values are sane when analyzing error logs sent in by users. Signed-off-by: Simon Rozman

api: tighten function parameter code analysis annotations

2021-02-04T18:00:17Z

Signed-off-by: Simon Rozman