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The current icmp_rcv function drops all unknown ICMP types, including ICMP_EXT_ECHOREPLY (type 43). In order to parse Extended Echo Reply messages, we have to pass these packets to the ping_rcv function, which does not do any other filtering and passes the packet to the designated socket. Pass incoming RFC 8335 ICMP Extended Echo Reply packets to the ping_rcv handler instead of discarding the packet. Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.