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To enable the TKIP/CCMP replay protection, the frames has to be processed in the right order. However, the device is not able to re-order the frames during BlockAck sessions. Mac80211 is able to reorder the frames, but it need the information about the BlockAck sessions start and stop. Unfortunately, since the BlockAck is fully handled by the hardware, these frames were not forwarded to the host. So, if the driver ask to mac80211 to apply the replay protection, it drop all misordered frames. So, until now, the driver explicitly asked to mac80211 to not apply the CCMP/TKIP replay protection. The situation has changed with the API 3.4 of the device firmware. The firmware forward the BlockAck information. Mac80211 is now able to correctly reorder the frames. There is no more reasons to drop cryptographic data. This patch also impact the older firmwares. There will be a performance impact on these firmware (since the misordered frames will dropped). However, we can't keep the replay protection disabled. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200701150707.222985-12-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.