Robert Lubos cd85e0ef82 net: ipv6: Fix Neighbor Advertisement processing w/o TLLA option
According to RFC 4861, ch. 7.2.5:

 "If the Override flag is set, or the supplied link-layer address
  is the same as that in the cache, or no Target Link-Layer Address
  option was supplied, the received advertisement MUST update the
  Neighbor Cache entry as follows

  ...

  If the Solicited flag is set, the state of the entry MUST be
  set to REACHABLE"

This indicates that Target Link-Layer Address option does not need to be
present in the received solicited Neighbor Advertisement to confirm
reachability. Therefore remove `tllao_offset` variable check from the
if condition responsible for updating cache entry. No further changes in
the logic are required because if TLLA option is missing,
`lladdr_changed` will be set to false, so no LL address will be updated.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
(cherry picked from commit 02c153c8b1)
2025-02-20 10:44:32 -08:00
2025-02-11 10:19:42 -08:00
2025-02-04 16:29:39 -06:00
2022-04-28 08:55:39 -04:00
2024-10-22 19:04:37 -04:00
2024-11-15 17:27:32 -06:00
2024-12-27 12:06:38 -08:00

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The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM (Cortex-A,
Cortex-R, Cortex-M), Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V,
SPARC, MIPS, and a large number of `supported boards`_.

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Getting Started
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Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.

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Resources
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Here's a quick summary of resources to help you find your way around:

Getting Started
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  | 📖 `Zephyr Documentation`_
  | 🚀 `Getting Started Guide`_
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  | 💻 `Code samples`_

Code and Development
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.. _Zephyr Project Website: https://www.zephyrproject.org
.. _Discord Server: https://chat.zephyrproject.org
.. _supported boards: https://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: https://docs.zephyrproject.org
.. _Introduction to Zephyr: https://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: https://docs.zephyrproject.org/latest/develop/getting_started/index.html
.. _Contribution Guide: https://docs.zephyrproject.org/latest/contribute/index.html
.. _Source Code Repository: https://github.com/zephyrproject-rtos/zephyr
.. _GitHub Issues: https://github.com/zephyrproject-rtos/zephyr/issues
.. _Releases: https://github.com/zephyrproject-rtos/zephyr/releases
.. _Project Wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
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.. _Other project mailing lists: https://lists.zephyrproject.org/g/main/subgroups
.. _Code samples: https://docs.zephyrproject.org/latest/samples/index.html
.. _Security documentation: https://docs.zephyrproject.org/latest/security/index.html
.. _Security Advisories Repository: https://github.com/zephyrproject-rtos/zephyr/security
.. _Tips when asking for help: https://docs.zephyrproject.org/latest/develop/getting_started/index.html#asking-for-help
.. _Zephyr Tech Talks: https://www.zephyrproject.org/tech-talks
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