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wifi: cfg80211: use ML element parsing helpers

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Use the existing ML element parsing helpers and add a new
one for this (ieee80211_mle_get_mld_id).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240216135047.4da47b1f035b.I437a5570ac456449facb0b147851ef24a1e473c2@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2024-02-16 13:54:32 +02:00
parent 6bd14aee0b
commit 894dd84e49
2 changed files with 46 additions and 33 deletions
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include/linux/ieee80211.h
+38
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@@ -5115,6 +5115,44 @@ static inline u16 ieee80211_mle_get_mld_capa_op(const u8 *data)
return get_unaligned_le16(common);
}
/**
* ieee80211_mle_get_mld_id - returns the MLD ID
* @data: pointer to the multi link element
*
* The element is assumed to be of the correct type (BASIC) and big enough,
* this must be checked using ieee80211_mle_type_ok().
*
* If the MLD ID is not present, 0 will be returned.
*/
static inline u8 ieee80211_mle_get_mld_id(const u8 *data)
{
const struct ieee80211_multi_link_elem *mle = (const void *)data;
u16 control = le16_to_cpu(mle->control);
const u8 *common = mle->variable;
/*
* common points now at the beginning of
* ieee80211_mle_basic_common_info
*/
common += sizeof(struct ieee80211_mle_basic_common_info);
if (!(control & IEEE80211_MLC_BASIC_PRES_MLD_ID))
return 0;
if (control & IEEE80211_MLC_BASIC_PRES_LINK_ID)
common += 1;
if (control & IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT)
common += 1;
if (control & IEEE80211_MLC_BASIC_PRES_MED_SYNC_DELAY)
common += 2;
if (control & IEEE80211_MLC_BASIC_PRES_EML_CAPA)
common += 2;
if (control & IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP)
common += 2;
return *common;
}
/**
* ieee80211_mle_size_ok - validate multi-link element size
* @data: pointer to the element data