1) Remove the dependency on the WdfCoInstaller*.dll file. This file appears
to be unnecessary for Windows 7 and up, and for patched Vista+2008.
2) Remove the WinDivert.inf file (only used by the co-installer).
3) 32/64-bit versions of the driver are now explicitly named, meaning that
the two can co-exist in the same directory.
4) The 32-bit WinDivert.dll can now automatically load the 64-bit driver on
64-bit Windows. This means it is possible to write 32-bit WinDivert
applications that automatically work on 64-bit windows.
5) WinDivert.dll now schedules the WinDivert service to be deleted right
away. This should fix some cases where the service is never deleted,
even during reboot.
6) Updated build scripts to reflect the changes.
NET_BUFFERs in a single NET_BUFFER_LIST. Apparently this should only
ever occur in the FORWARD layer in certain circumstances, and even then each
fragment should be indicated individually anyway. This change removes a lot
of needless complexity.
the original packet. The former turns out to be problematic, since there is
no guarantee that something else (e.g. another callout driver)
modifies/overwrites the packet data whilst it is in the queue. Copying the
data is not ideal either, but seems to be the only way to ensure the packet
is not changed later.
* Re-brand "DIVERT" to "WINDIVERT" throughout the code-base.
* New flags:
> WINDIVERT_FLAG_PASSTHRU: Do not drop nor capture packets. Useful
for injection-only handles.
> WINDIVERT_FLAG_NO_CHECKSUM: Do not guarantee that diverted packets
have a correct checksum.
NOTE: Not yet tested!
* New default values and limits for various WinDivert parameters,
including WINDIVERT_PARAM_QUEUE_LEN, WINDIVERT_PARAM_QUEUE_TIME, and
the maximum filter length.
* New extended WinDivert functions that support asynchronous I/O:
> WinDivertRecvEx(..)
> WinDivertSendEx(..)
NOTE: Not yet tested!
* The WinDivert driver now services reads (receives) out-of-band.
The motivation is because WFP callouts are run at DISPATCH_LEVEL, so
we should not be doing expensive work in the ClassifyFn. This is also
the same reason why the filter length has been restricted.
* Use type 0 for FwpsInjectionHandleCreate0 for the FORWARD layer.
* Use FWPS_FIELD_IPFORWARD_V{4|6}_DESTINATION_INTERFACE_INDEX to get addr->IfIdx
* Replace FWP_ACTION_CONTINUE with FWP_ACTION_PERMIT.
Name and version:
* Now officially called 'WinDivert'
* Now officially working towards a version 1.0 release
New features:
* WinDivert now supports a packet-sniffing mode. This mode merely
copies packets, and does not drop the original.
* WinDivert now also supports a packet-dropping mode.
* WinDivert now supports filter priorities.
* WinDivert now supports a forwarded packet layer (WARNING: untested).
* WinDivert now supports get/set parameters such as packet queue length and
time.
* WinDivert now supports larger filters (but use at own risk).
* WinDivert now uninstalls the driver on program exit/library unload
* Different versions of WinDivert can co-exist on the same machine
(WARNING: untested, as there is currently only one version).
New License:
* WinDivert is now LGPL. This is less restrictive than the GPL so WinDivert
can be linked to by commercial software (under the terms of the LGPL
license).
Technical:
* Cleaner IOCTL interface.
* Cleaner driver implementation.
* Thread local events in WinDivert.dll
* Many minor tweaks and fixes.
includes making the driver handle I/O requests in parallel, and changing
the library such that it uses overlapped I/O. Overall the package is
now significantly faster.
- The divert driver now only adds WFP callouts when a filter is set,
instead of when a handle is created.
- The divert driver now attempts to avoid adding WFP callouts that are
superfluous with respect to the filter.
- The divert driver now explicitly deletes filters and callouts during
cleanup. This appears to resolve a bug where network connectivity is
sometimes lost.
- Added a new sample program: passthru.exe. This example doesn't do anything
interesting but is useful for speed testing.
- Rename build.sh to mingw-build.sh to avoid confusion.
context, resulting in an occasional BSOD.
- Fix bug where the driver rejects the "false" filter.
- Update documentation to reflect that the "false" filter is still useful
for packet injection.
- Make the pAddr arg for DivertRecv() optional
- Make the i386 user binaries compatible with an amd64 driver.
(useful for projects not yet ported to amd64)
data itself. This makes for a much cleaner interface.
sys/divert.c
dll/divert.c
include/*.h
DivertRecv and DivertSend now use IOCTLs instead of reads/writes.
The 'address' parameter is passed by pointer to the driver, which
writes directly to it (after sanity checks).
This means that the data buffer now only contains the packet, which
help to avoid some messy code.
examples/*/*.c
Update the examples to reflect the new API.
doc/divert.html
Update the documentation to reflect the new API.
basil00