From: Ilan Peer Date: Thu, 2 Jan 2025 14:20:01 +0000 (+0200) Subject: wifi: mac80211: Support parsing EPCS ML element X-Git-Tag: v6.12.19~118 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ae5106e5df84c4d79aa2e2bfd9f935202e14a6d;p=thirdparty%2Fkernel%2Fstable.git wifi: mac80211: Support parsing EPCS ML element [ Upstream commit 24711d60f8492a30622e419cee643d59264ea939 ] 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 Reviewed-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20250102161730.5afdf65cff46.I0ffa30b40fbad47bc5b608b5fd46047a8c44e904@changeid Signed-off-by: Johannes Berg Stable-dep-of: 99ca2c28e6b6 ("wifi: mac80211: fix MLE non-inheritance parsing") Signed-off-by: Sasha Levin --- diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 7a0242e937d36..bfe0514efca37 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1751,6 +1751,7 @@ struct ieee802_11_elems { const struct ieee80211_eht_operation *eht_operation; const struct ieee80211_multi_link_elem *ml_basic; 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_ttlm_elem *ttlm[IEEE80211_TTLM_MAX_CNT]; @@ -1781,6 +1782,7 @@ struct ieee802_11_elems { /* mult-link element can be de-fragmented and thus u8 is not sufficient */ size_t ml_basic_len; size_t ml_reconf_len; + size_t ml_epcs_len; u8 ttlm_num; diff --git a/net/mac80211/parse.c b/net/mac80211/parse.c index 279c5143b3356..cd318c1c67bec 100644 --- a/net/mac80211/parse.c +++ b/net/mac80211/parse.c @@ -44,6 +44,9 @@ struct ieee80211_elems_parse { /* The reconfiguration Multi-Link element in the original elements */ 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 * tasks, e.g., element de-fragmentation etc. @@ -159,6 +162,9 @@ ieee80211_parse_extension_element(u32 *crc, case IEEE80211_ML_CONTROL_TYPE_RECONF: elems_parse->ml_reconf_elem = elem; break; + case IEEE80211_ML_CONTROL_TYPE_PRIO_ACCESS: + elems_parse->ml_epcs_elem = elem; + break; default: break; } @@ -943,6 +949,27 @@ ieee80211_mle_defrag_reconf(struct ieee80211_elems_parse *elems_parse) 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 * 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_epcs(elems_parse); + if (elems->tim && !elems->parse_error) { const struct ieee80211_tim_ie *tim_ie = elems->tim;