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wifi: mac80211: add API to parse multi-link element 

Add the necessary API to parse the multi-link element in
the future. For now, link only to the element when found
so we can use it in the client-side code later.

Later, we'll need to fill this in to deal with element
fragmentation, parse the STA profile, etc.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-06-30 13:48:22 +02:00
parent af4f2aa35a
commit 425f4b5fce
2 changed files with 10 additions and 0 deletions
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5
net/mac80211/ieee80211_i.h
View File

@ -1658,6 +1658,7 @@ struct ieee802_11_elems {
const struct ieee80211_aid_response_ie *aid_resp;
const struct ieee80211_eht_cap_elem *eht_cap;
const struct ieee80211_eht_operation *eht_operation;
const struct ieee80211_multi_link_elem *multi_link;
/* length of them, respectively */
u8 ext_capab_len;
@ -2161,6 +2162,8 @@ static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
* @bss: the BSS to parse this as, for multi-BSSID cases this can
* represent a non-transmitting BSS in which case the data
* for that non-transmitting BSS is returned
* @link_id: the link ID to parse elements for, if a STA profile
* is present in the multi-link element, or -1 to ignore
*/
struct ieee80211_elems_parse_params {
const u8 *start;
@ -2169,6 +2172,7 @@ struct ieee80211_elems_parse_params {
u64 filter;
u32 crc;
struct cfg80211_bss *bss;
int link_id;
};
struct ieee802_11_elems *
@ -2186,6 +2190,7 @@ ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
.filter = filter,
.crc = crc,
.bss = bss,
.link_id = -1,
};
return ieee802_11_parse_elems_full(&params);

5
net/mac80211/util.c
View File

@ -1022,6 +1022,10 @@ static void ieee80211_parse_extension_element(u32 *crc,
if (ieee80211_eht_oper_size_ok(data, len))
elems->eht_operation = data;
break;
case WLAN_EID_EXT_EHT_MULTI_LINK:
if (ieee80211_mle_size_ok(data, len))
elems->multi_link = (void *)data;
break;
}
}
@ -1524,6 +1528,7 @@ ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
.start = nontransmitted_profile,
.len = nontransmitted_profile_len,
.action = params->action,
.link_id = params->link_id,
};
_ieee802_11_parse_elems_full(&sub, elems, NULL);