diff options
| author | Masashi Honma <masashi.honma@gmail.com> | 2026-05-30 08:09:48 +0900 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2026-06-03 14:07:07 +0200 |
| commit | 4ec9ea8a58859c260ae32e097aa643975572e58b (patch) | |
| tree | 10205373ac9cf2a93a578b3447bc0de644e38ad8 /include/linux | |
| parent | d158e54476ea9667c33dfa2c8d87c7cc32b40f1b (diff) | |
wifi: mac80211: Fix PERR frame processing
There are no issues with the PERR processing itself; however, to maintain
consistency with the previous PREQ/PREP code modifications, I will create a
new mesh_path_parse_error_frame() function to separately implement the
frame format validation and the "not supported" check.
Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
Link: https://patch.msgid.link/20260529230952.124754-6-masashi.honma@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ieee80211-mesh.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/ieee80211-mesh.h b/include/linux/ieee80211-mesh.h index 482ac0c6d759..7eb15834531c 100644 --- a/include/linux/ieee80211-mesh.h +++ b/include/linux/ieee80211-mesh.h @@ -403,4 +403,40 @@ static inline bool ieee80211_mesh_prep_size_ok(const u8 *pos, u8 elen) return elen == needed; } +/* IEEE Std 802.11-2016 9.4.2.115 PERR element */ +static inline bool ieee80211_mesh_perr_size_ok(const u8 *pos, u8 elen) +{ + struct ieee80211_mesh_hwmp_perr *perr_elem = (void *)pos; + const u8 *start = pos; + u8 number_of_dst; + int needed; + int i; + + needed = sizeof(struct ieee80211_mesh_hwmp_perr); + + /* Check if the element contains number of dst */ + if (elen < needed) + return false; + + pos += sizeof(struct ieee80211_mesh_hwmp_perr); + number_of_dst = perr_elem->number_of_dst; + + for (i = 0; i < number_of_dst; i++) { + struct ieee80211_mesh_hwmp_perr_dst *dst = (void *)pos; + u8 dst_len = sizeof(struct ieee80211_mesh_hwmp_perr_dst); + + /* Check if the element contains flags */ + if (elen < pos - start + dst_len) + return false; + + dst_len += ((dst->flags & AE_F) ? ETH_ALEN : 0) + /* Destination External Address */ + + 2 /* Reason Code */; + needed += dst_len; + pos += dst_len; + } + + return elen == needed; +} + #endif /* LINUX_IEEE80211_MESH_H */ |