summaryrefslogtreecommitdiffstats
path: root/net/mac80211/scan.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/mac80211/scan.c')
-rw-r--r--net/mac80211/scan.c75
1 files changed, 40 insertions, 35 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 95413413f98c..b58f75da9c84 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -8,6 +8,7 @@
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2013-2015 Intel Mobile Communications GmbH
* Copyright 2016-2017 Intel Deutschland GmbH
+ * Copyright (C) 2018-2019 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -61,7 +62,6 @@ struct ieee80211_bss *
ieee80211_bss_info_update(struct ieee80211_local *local,
struct ieee80211_rx_status *rx_status,
struct ieee80211_mgmt *mgmt, size_t len,
- struct ieee802_11_elems *elems,
struct ieee80211_channel *channel)
{
bool beacon = ieee80211_is_beacon(mgmt->frame_control);
@@ -73,6 +73,9 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
};
bool signal_valid;
struct ieee80211_sub_if_data *scan_sdata;
+ struct ieee802_11_elems elems;
+ size_t baselen;
+ u8 *elements;
if (rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)
bss_meta.signal = 0; /* invalid signal indication */
@@ -106,6 +109,22 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
mgmt, len, GFP_ATOMIC);
if (!cbss)
return NULL;
+
+ if (ieee80211_is_probe_resp(mgmt->frame_control)) {
+ elements = mgmt->u.probe_resp.variable;
+ baselen = offsetof(struct ieee80211_mgmt,
+ u.probe_resp.variable);
+ } else {
+ baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable);
+ elements = mgmt->u.beacon.variable;
+ }
+
+ if (baselen > len)
+ return NULL;
+
+ ieee802_11_parse_elems(elements, len - baselen, false, &elems,
+ mgmt->bssid, cbss->bssid);
+
/* In case the signal is invalid update the status */
signal_valid = abs(channel->center_freq - cbss->channel->center_freq)
<= local->hw.wiphy->max_adj_channel_rssi_comp;
@@ -119,7 +138,7 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
else
bss->device_ts_presp = rx_status->device_timestamp;
- if (elems->parse_error) {
+ if (elems.parse_error) {
if (beacon)
bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON;
else
@@ -132,45 +151,45 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
}
/* save the ERP value so that it is available at association time */
- if (elems->erp_info && (!elems->parse_error ||
- !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) {
- bss->erp_value = elems->erp_info[0];
+ if (elems.erp_info && (!elems.parse_error ||
+ !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) {
+ bss->erp_value = elems.erp_info[0];
bss->has_erp_value = true;
- if (!elems->parse_error)
+ if (!elems.parse_error)
bss->valid_data |= IEEE80211_BSS_VALID_ERP;
}
/* replace old supported rates if we get new values */
- if (!elems->parse_error ||
+ if (!elems.parse_error ||
!(bss->valid_data & IEEE80211_BSS_VALID_RATES)) {
srlen = 0;
- if (elems->supp_rates) {
+ if (elems.supp_rates) {
clen = IEEE80211_MAX_SUPP_RATES;
- if (clen > elems->supp_rates_len)
- clen = elems->supp_rates_len;
- memcpy(bss->supp_rates, elems->supp_rates, clen);
+ if (clen > elems.supp_rates_len)
+ clen = elems.supp_rates_len;
+ memcpy(bss->supp_rates, elems.supp_rates, clen);
srlen += clen;
}
- if (elems->ext_supp_rates) {
+ if (elems.ext_supp_rates) {
clen = IEEE80211_MAX_SUPP_RATES - srlen;
- if (clen > elems->ext_supp_rates_len)
- clen = elems->ext_supp_rates_len;
- memcpy(bss->supp_rates + srlen, elems->ext_supp_rates,
+ if (clen > elems.ext_supp_rates_len)
+ clen = elems.ext_supp_rates_len;
+ memcpy(bss->supp_rates + srlen, elems.ext_supp_rates,
clen);
srlen += clen;
}
if (srlen) {
bss->supp_rates_len = srlen;
- if (!elems->parse_error)
+ if (!elems.parse_error)
bss->valid_data |= IEEE80211_BSS_VALID_RATES;
}
}
- if (!elems->parse_error ||
+ if (!elems.parse_error ||
!(bss->valid_data & IEEE80211_BSS_VALID_WMM)) {
- bss->wmm_used = elems->wmm_param || elems->wmm_info;
- bss->uapsd_supported = is_uapsd_supported(elems);
- if (!elems->parse_error)
+ bss->wmm_used = elems.wmm_param || elems.wmm_info;
+ bss->uapsd_supported = is_uapsd_supported(&elems);
+ if (!elems.parse_error)
bss->valid_data |= IEEE80211_BSS_VALID_WMM;
}
@@ -206,10 +225,7 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
struct ieee80211_sub_if_data *sdata1, *sdata2;
struct ieee80211_mgmt *mgmt = (void *)skb->data;
struct ieee80211_bss *bss;
- u8 *elements;
struct ieee80211_channel *channel;
- size_t baselen;
- struct ieee802_11_elems elems;
if (skb->len < 24 ||
(!ieee80211_is_probe_resp(mgmt->frame_control) &&
@@ -244,26 +260,15 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
!ieee80211_scan_accept_presp(sdata2, sched_scan_req_flags,
mgmt->da))
return;
-
- elements = mgmt->u.probe_resp.variable;
- baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
- } else {
- baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable);
- elements = mgmt->u.beacon.variable;
}
- if (baselen > skb->len)
- return;
-
- ieee802_11_parse_elems(elements, skb->len - baselen, false, &elems);
-
channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
return;
bss = ieee80211_bss_info_update(local, rx_status,
- mgmt, skb->len, &elems,
+ mgmt, skb->len,
channel);
if (bss)
ieee80211_rx_bss_put(local, bss);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-08 05:52:16 +0100