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mac80211: convert S1G beacon to scan results

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This commit finds the correct offset for Information
Elements in S1G beacon frames so they can be reported in
scan results.

Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
Link: https://lore.kernel.org/r/20200922022818.15855-8-thomas@adapt-ip.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Thomas Pedersen 2020-09-21 19:28:08 -07:00 committed by Johannes Berg
parent 66b0564d7e
commit cd418ba63f
4 changed files with 40 additions and 5 deletions
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3
net/mac80211/ieee80211_i.h
View File

@ -1535,6 +1535,9 @@ struct ieee802_11_elems {
u8 dtim_count;
u8 dtim_period;
const struct ieee80211_addba_ext_ie *addba_ext_ie;
const struct ieee80211_s1g_cap *s1g_capab;
const struct ieee80211_s1g_oper_ie *s1g_oper;
const struct ieee80211_s1g_bcn_compat_ie *s1g_bcn_compat;
/* length of them, respectively */
u8 ext_capab_len;

3
net/mac80211/rx.c
View File

@ -4578,7 +4578,8 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
ieee80211_verify_alignment(&rx);
if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) ||
ieee80211_is_beacon(hdr->frame_control)))
ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_s1g_beacon(hdr->frame_control)))
ieee80211_scan_rx(local, skb);
if (ieee80211_is_data(fc)) {

17
net/mac80211/scan.c
View File

@ -146,7 +146,8 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
struct ieee80211_mgmt *mgmt, size_t len,
struct ieee80211_channel *channel)
{
bool beacon = ieee80211_is_beacon(mgmt->frame_control);
bool beacon = ieee80211_is_beacon(mgmt->frame_control) ||
ieee80211_is_s1g_beacon(mgmt->frame_control);
struct cfg80211_bss *cbss, *non_tx_cbss;
struct ieee80211_bss *bss, *non_tx_bss;
struct cfg80211_inform_bss bss_meta = {
@ -195,6 +196,11 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
elements = mgmt->u.probe_resp.variable;
baselen = offsetof(struct ieee80211_mgmt,
u.probe_resp.variable);
} else if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
struct ieee80211_ext *ext = (void *) mgmt;
baselen = offsetof(struct ieee80211_ext, u.s1g_beacon.variable);
elements = ext->u.s1g_beacon.variable;
} else {
baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable);
elements = mgmt->u.beacon.variable;
@ -246,9 +252,12 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
struct ieee80211_bss *bss;
struct ieee80211_channel *channel;
if (skb->len < 24 ||
(!ieee80211_is_probe_resp(mgmt->frame_control) &&
!ieee80211_is_beacon(mgmt->frame_control)))
if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
if (skb->len < 15)
return;
} else if (skb->len < 24 ||
(!ieee80211_is_probe_resp(mgmt->frame_control) &&
!ieee80211_is_beacon(mgmt->frame_control)))
return;
sdata1 = rcu_dereference(local->scan_sdata);

22
net/mac80211/util.c
View File

@ -1003,6 +1003,10 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
case WLAN_EID_LINK_ID:
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
case WLAN_EID_RSNX:
case WLAN_EID_S1G_BCN_COMPAT:
case WLAN_EID_S1G_CAPABILITIES:
case WLAN_EID_S1G_OPERATION:
case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
/*
* not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
* that if the content gets bigger it might be needed more than once
@ -1288,6 +1292,24 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
&crc : NULL,
elem, elems);
break;
case WLAN_EID_S1G_CAPABILITIES:
if (elen == sizeof(*elems->s1g_capab))
elems->s1g_capab = (void *)pos;
else
elem_parse_failed = true;
break;
case WLAN_EID_S1G_OPERATION:
if (elen == sizeof(*elems->s1g_oper))
elems->s1g_oper = (void *)pos;
else
elem_parse_failed = true;
break;
case WLAN_EID_S1G_BCN_COMPAT:
if (elen == sizeof(*elems->s1g_bcn_compat))
elems->s1g_bcn_compat = (void *)pos;
else
elem_parse_failed = true;
break;
default:
break;
}