- inbounds/outbound now work for SOCKET layer.
- passthru.exe now uses MTU_MAX to prevent 122
errors.
- Further header parsing code hardening.
- Fix bug where Reserved2 was not zeroed.
This flag only affects inbound packets at the
WINDIVERT_LAYER_NETWORK layer.
If set, the handle will capture IP fragments,
but not reassembled IP packets.
If unset (the default), the handle will capture
reassembled IP packets, but not IP fragments.
- Add "length" for total packet length.
- Add "timestamp" for timestamp filtering.
- All filter language numbers are now signed.
- Add new macros: TRUE, FALSE, TCP, UDP, ICMP &
ICMPV6.
- Future-proof the WINDIVERT_FILTER struct.
- Socket (& flow) events are now associated with
a endpointId/parentEndpointId pair that allows
the tracking of socket operations.
- A single socket CLOSE event replaces the UNBIND
and DISCONNECT events.
- A new flag addr.Sniffed indicates if the event
was sniffed or not. Some events (CLOSE) are
always sniffed, regardless of the flags.
- All filter language numbers are now 128bit.
- socketdump.exe can now optionally block events.
- Add UNBIND/DISCONNECT events to the SOCKET
layer. These events can only be sniffed.
- Remove the RECV_PARTIAL flag. The user
application can just ignore the error code
instead.
- WINDIVERT_ADDRESS is now 64bytes. Some extra
padding added for future-proofing.
- Ignore SOCKET-layer REAUTHORIZE.
- The REFLECT layer returns the filter object
directly (no IPv4 "pseudo" packet).
This function decrements the ip.TTL or
ipv6.HopLimit field. For ipv4, it also updates
the checksum.
Also:
- Make WinDivertHelperParsePacket() work on a
single packet unless the pNext parameters are
provided.
- Update documentation.
Since pseudo checksums can now be arbitrary
values, the WinDivertHelperCalcChecksums function
no longer attempts to calculate the pseudo-
header checksum.
The MSVCRT*.dll dependency has been removed by:
(1) using Win32 API equivalents where possible,
and (2) re-implementing some basic C runtime
functions. This prevents multiple MSVCRTs from
being loaded at runtime (if the application uses
a different version than the DLL). The new
WinDivert.dll only depends on KERNEL32.dll and
ADVAPI32.dll.
Furthermore, the MINGW build has been extended
to generate a WinDivert.lib import library file.
This means that the MINGW DLL can now be used
directly by Visual Studio (any version).
For some reason pseudo checksums do not work on
some systems. The workaround is to modify
WinDivertSend() so that it calculates the full
checksums before forwarding the packet to the
driver.
This allows projects that are strictly "GPLv2
only" to use WinDivert without licensing issues.
See the FSF's compatibility matrix here:
https://www.gnu.org/licenses/gpl-faq.en.html
This change does not affect existing projects
that can continue to use the LGPLv3 as before.
Also, bump the WinDivert version to 1.4.1.
Bump version and change magic numbers to make the driver incompatible with
older versions. Also cleanup some driver checksum code missed by previous
commit.
* 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.
basil00