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wifi: mac80211: Support parsing EPCS ML element

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Add support for parsing an ML element of type EPCS priority
access, which can optionally be included in EHT protected action
frames used to configure EPCS.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250102161730.5afdf65cff46.I0ffa30b40fbad47bc5b608b5fd46047a8c44e904@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ilan Peer 2025-01-02 16:20:01 +02:00 committed by Johannes Berg
parent 19aa842dcb
commit 24711d60f8
2 changed files with 31 additions and 0 deletions
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2
net/mac80211/ieee80211_i.h
View File

@ -1762,6 +1762,7 @@ struct ieee802_11_elems {
const struct ieee80211_eht_operation *eht_operation; const struct ieee80211_eht_operation *eht_operation;
const struct ieee80211_multi_link_elem *ml_basic; const struct ieee80211_multi_link_elem *ml_basic;
const struct ieee80211_multi_link_elem *ml_reconf; const struct ieee80211_multi_link_elem *ml_reconf;
const struct ieee80211_multi_link_elem *ml_epcs;
const struct ieee80211_bandwidth_indication *bandwidth_indication; const struct ieee80211_bandwidth_indication *bandwidth_indication;
const struct ieee80211_ttlm_elem *ttlm[IEEE80211_TTLM_MAX_CNT]; const struct ieee80211_ttlm_elem *ttlm[IEEE80211_TTLM_MAX_CNT];
@ -1792,6 +1793,7 @@ struct ieee802_11_elems {
/* mult-link element can be de-fragmented and thus u8 is not sufficient */ /* mult-link element can be de-fragmented and thus u8 is not sufficient */
size_t ml_basic_len; size_t ml_basic_len;
size_t ml_reconf_len; size_t ml_reconf_len;
size_t ml_epcs_len;
u8 ttlm_num; u8 ttlm_num;

29
net/mac80211/parse.c
View File

@ -44,6 +44,9 @@ struct ieee80211_elems_parse {
/* The reconfiguration Multi-Link element in the original elements */ /* The reconfiguration Multi-Link element in the original elements */
const struct element *ml_reconf_elem; const struct element *ml_reconf_elem;
/* The EPCS Multi-Link element in the original elements */
const struct element *ml_epcs_elem;
/* /*
* scratch buffer that can be used for various element parsing related * scratch buffer that can be used for various element parsing related
* tasks, e.g., element de-fragmentation etc. * tasks, e.g., element de-fragmentation etc.
@ -159,6 +162,9 @@ ieee80211_parse_extension_element(u32 *crc,
case IEEE80211_ML_CONTROL_TYPE_RECONF: case IEEE80211_ML_CONTROL_TYPE_RECONF:
elems_parse->ml_reconf_elem = elem; elems_parse->ml_reconf_elem = elem;
break; break;
case IEEE80211_ML_CONTROL_TYPE_PRIO_ACCESS:
elems_parse->ml_epcs_elem = elem;
break;
default: default:
break; break;
} }
@ -943,6 +949,27 @@ ieee80211_mle_defrag_reconf(struct ieee80211_elems_parse *elems_parse)
elems_parse->scratch_pos += ml_len; elems_parse->scratch_pos += ml_len;
} }
static void
ieee80211_mle_defrag_epcs(struct ieee80211_elems_parse *elems_parse)
{
struct ieee802_11_elems *elems = &elems_parse->elems;
ssize_t ml_len;
ml_len = cfg80211_defragment_element(elems_parse->ml_epcs_elem,
elems->ie_start,
elems->total_len,
elems_parse->scratch_pos,
elems_parse->scratch +
elems_parse->scratch_len -
elems_parse->scratch_pos,
WLAN_EID_FRAGMENT);
if (ml_len < 0)
return;
elems->ml_epcs = (void *)elems_parse->scratch_pos;
elems->ml_epcs_len = ml_len;
elems_parse->scratch_pos += ml_len;
}
struct ieee802_11_elems * struct ieee802_11_elems *
ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params) ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
{ {
@ -1001,6 +1028,8 @@ ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
ieee80211_mle_defrag_reconf(elems_parse); ieee80211_mle_defrag_reconf(elems_parse);
ieee80211_mle_defrag_epcs(elems_parse);
if (elems->tim && !elems->parse_error) { if (elems->tim && !elems->parse_error) {
const struct ieee80211_tim_ie *tim_ie = elems->tim; const struct ieee80211_tim_ie *tim_ie = elems->tim;