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-rw-r--r--net/wireless/scan.c154
1 files changed, 11 insertions, 143 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index b9eb91f485f8..75e6e032bb3a 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -2312,118 +2312,6 @@ cfg80211_inform_bss_data(struct wiphy *wiphy,
}
EXPORT_SYMBOL(cfg80211_inform_bss_data);
-static void
-cfg80211_parse_mbssid_frame_data(struct wiphy *wiphy,
- struct cfg80211_inform_bss *data,
- struct ieee80211_mgmt *mgmt, size_t len,
- struct cfg80211_non_tx_bss *non_tx_data,
- gfp_t gfp)
-{
- enum cfg80211_bss_frame_type ftype;
- const u8 *ie = mgmt->u.probe_resp.variable;
- size_t ielen = len - offsetof(struct ieee80211_mgmt,
- u.probe_resp.variable);
-
- ftype = ieee80211_is_beacon(mgmt->frame_control) ?
- CFG80211_BSS_FTYPE_BEACON : CFG80211_BSS_FTYPE_PRESP;
-
- cfg80211_parse_mbssid_data(wiphy, data, ftype, mgmt->bssid,
- le64_to_cpu(mgmt->u.probe_resp.timestamp),
- le16_to_cpu(mgmt->u.probe_resp.beacon_int),
- ie, ielen, non_tx_data, gfp);
-}
-
-static void
-cfg80211_update_notlisted_nontrans(struct wiphy *wiphy,
- struct cfg80211_bss *nontrans_bss,
- struct ieee80211_mgmt *mgmt, size_t len)
-{
- u8 *ie, *new_ie, *pos;
- const struct element *nontrans_ssid;
- const u8 *trans_ssid, *mbssid;
- size_t ielen = len - offsetof(struct ieee80211_mgmt,
- u.probe_resp.variable);
- size_t new_ie_len;
- struct cfg80211_bss_ies *new_ies;
- const struct cfg80211_bss_ies *old;
- size_t cpy_len;
-
- lockdep_assert_held(&wiphy_to_rdev(wiphy)->bss_lock);
-
- ie = mgmt->u.probe_resp.variable;
-
- new_ie_len = ielen;
- trans_ssid = cfg80211_find_ie(WLAN_EID_SSID, ie, ielen);
- if (!trans_ssid)
- return;
- new_ie_len -= trans_ssid[1];
- mbssid = cfg80211_find_ie(WLAN_EID_MULTIPLE_BSSID, ie, ielen);
- /*
- * It's not valid to have the MBSSID element before SSID
- * ignore if that happens - the code below assumes it is
- * after (while copying things inbetween).
- */
- if (!mbssid || mbssid < trans_ssid)
- return;
- new_ie_len -= mbssid[1];
-
- nontrans_ssid = ieee80211_bss_get_elem(nontrans_bss, WLAN_EID_SSID);
- if (!nontrans_ssid)
- return;
-
- new_ie_len += nontrans_ssid->datalen;
-
- /* generate new ie for nontrans BSS
- * 1. replace SSID with nontrans BSS' SSID
- * 2. skip MBSSID IE
- */
- new_ie = kzalloc(new_ie_len, GFP_ATOMIC);
- if (!new_ie)
- return;
-
- new_ies = kzalloc(sizeof(*new_ies) + new_ie_len, GFP_ATOMIC);
- if (!new_ies)
- goto out_free;
-
- pos = new_ie;
-
- /* copy the nontransmitted SSID */
- cpy_len = nontrans_ssid->datalen + 2;
- memcpy(pos, nontrans_ssid, cpy_len);
- pos += cpy_len;
- /* copy the IEs between SSID and MBSSID */
- cpy_len = trans_ssid[1] + 2;
- memcpy(pos, (trans_ssid + cpy_len), (mbssid - (trans_ssid + cpy_len)));
- pos += (mbssid - (trans_ssid + cpy_len));
- /* copy the IEs after MBSSID */
- cpy_len = mbssid[1] + 2;
- memcpy(pos, mbssid + cpy_len, ((ie + ielen) - (mbssid + cpy_len)));
-
- /* update ie */
- new_ies->len = new_ie_len;
- new_ies->tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp);
- new_ies->from_beacon = ieee80211_is_beacon(mgmt->frame_control);
- memcpy(new_ies->data, new_ie, new_ie_len);
- if (ieee80211_is_probe_resp(mgmt->frame_control)) {
- old = rcu_access_pointer(nontrans_bss->proberesp_ies);
- rcu_assign_pointer(nontrans_bss->proberesp_ies, new_ies);
- rcu_assign_pointer(nontrans_bss->ies, new_ies);
- if (old)
- kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head);
- } else {
- old = rcu_access_pointer(nontrans_bss->beacon_ies);
- rcu_assign_pointer(nontrans_bss->beacon_ies, new_ies);
- cfg80211_update_hidden_bsses(bss_from_pub(nontrans_bss),
- new_ies, old);
- rcu_assign_pointer(nontrans_bss->ies, new_ies);
- if (old)
- kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head);
- }
-
-out_free:
- kfree(new_ie);
-}
-
/* cfg80211_inform_bss_width_frame helper */
static struct cfg80211_bss *
cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
@@ -2565,51 +2453,31 @@ cfg80211_inform_bss_frame_data(struct wiphy *wiphy,
struct ieee80211_mgmt *mgmt, size_t len,
gfp_t gfp)
{
- struct cfg80211_bss *res, *tmp_bss;
+ struct cfg80211_bss *res;
const u8 *ie = mgmt->u.probe_resp.variable;
- const struct cfg80211_bss_ies *ies1, *ies2;
size_t ielen = len - offsetof(struct ieee80211_mgmt,
u.probe_resp.variable);
+ enum cfg80211_bss_frame_type ftype;
struct cfg80211_non_tx_bss non_tx_data = {};
res = cfg80211_inform_single_bss_frame_data(wiphy, data, mgmt,
len, gfp);
+ if (!res)
+ return NULL;
/* don't do any further MBSSID handling for S1G */
if (ieee80211_is_s1g_beacon(mgmt->frame_control))
return res;
- if (!res || !wiphy->support_mbssid ||
- !cfg80211_find_elem(WLAN_EID_MULTIPLE_BSSID, ie, ielen))
- return res;
- if (wiphy->support_only_he_mbssid &&
- !cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, ie, ielen))
- return res;
-
+ ftype = ieee80211_is_beacon(mgmt->frame_control) ?
+ CFG80211_BSS_FTYPE_BEACON : CFG80211_BSS_FTYPE_PRESP;
non_tx_data.tx_bss = res;
- /* process each non-transmitting bss */
- cfg80211_parse_mbssid_frame_data(wiphy, data, mgmt, len,
- &non_tx_data, gfp);
-
- spin_lock_bh(&wiphy_to_rdev(wiphy)->bss_lock);
- /* check if the res has other nontransmitting bss which is not
- * in MBSSID IE
- */
- ies1 = rcu_access_pointer(res->ies);
-
- /* go through nontrans_list, if the timestamp of the BSS is
- * earlier than the timestamp of the transmitting BSS then
- * update it
- */
- list_for_each_entry(tmp_bss, &res->nontrans_list,
- nontrans_list) {
- ies2 = rcu_access_pointer(tmp_bss->ies);
- if (ies2->tsf < ies1->tsf)
- cfg80211_update_notlisted_nontrans(wiphy, tmp_bss,
- mgmt, len);
- }
- spin_unlock_bh(&wiphy_to_rdev(wiphy)->bss_lock);
+ /* process each non-transmitting bss */
+ cfg80211_parse_mbssid_data(wiphy, data, ftype, mgmt->bssid,
+ le64_to_cpu(mgmt->u.probe_resp.timestamp),
+ le16_to_cpu(mgmt->u.probe_resp.beacon_int),
+ ie, ielen, &non_tx_data, gfp);
return res;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-13 06:35:08 +0000