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0489390882
Before this patch, a sniffer attached to a VRF used as the receiving interface of L3 tunneled packets detects them as malformed packets and it complains about that (i.e.: tcpdump shows bogus packets). The reason is that a tunneled L3 packet does not carry any L2 information and when the VRF is set as the receiving interface of a decapsulated L3 packet, no mac header is currently set or valid. Therefore, the purpose of this patch consists of adding a MAC header to any packet which is directly received on the VRF interface ONLY IF: i) a sniffer is attached on the VRF and ii) the mac header is not set. In this case, the mac address of the VRF is copied in both the destination and the source address of the ethernet header. The protocol type is set either to IPv4 or IPv6, depending on which L3 packet is received. Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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.