wifi: mac80211: Use struct instead of macro for PERR frame

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The existing PERR_IE_* macros access HWMP PERR frame fields via hardcoded
byte offsets. Each PERR destination entry contains an optional 6-byte AE
(Address Extension) address followed by a reason code, making offset-based
access error-prone.

Introduce typed packed C structs to represent the PERR frame layout:
  - ieee80211_mesh_hwmp_perr: top-level frame containing TTL and
    destination count
  - ieee80211_mesh_hwmp_perr_dst: per-destination entry with optional AE
    address and variable-position reason code

Add ieee80211_mesh_hwmp_perr_get_rcode() to locate the reason code in
each destination entry depending on whether the AE flag is set.

This refactoring makes the PERR processing code consistent with the
struct-based approach adopted for PREQ and PREP in preceding patches.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
Link: https://patch.msgid.link/20260529230952.124754-3-masashi.honma@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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Masashi Honma 2026-05-30 08:09:45 +09:00 • committed by Johannes Berg

parent a91c65cb99

commit 68511e1632

2 changed files with 67 additions and 26 deletions

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62

include/linux/ieee80211-mesh.h

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31

net/mac80211/mesh_hwmp.c

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