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With can_create_echo_skb() the skb which is forwarded to the peer CAN interface shares the sk pointer from the originating socket. This makes the CAN frame show up in the peer namespace as a TX packet. With the use of skb_clone() analogue to the handling in gw.c the peer skb gets a new start in the peer namespace and correctly appears as a RX packet. Link: https://lore.kernel.org/all/20220309120416.83514-4-socketcan@hartkopp.net Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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.