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mac80211: add parsing of TDLS specific IEs

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These are used in TDLS channel switching code.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arik Nemtsov 2014-11-09 18:50:18 +02:00 committed by Johannes Berg
parent 1057d35ede
commit 5383758443
3 changed files with 33 additions and 0 deletions
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15
include/linux/ieee80211.h
View file

@ -1067,6 +1067,12 @@ struct ieee80211_pspoll {
/* TDLS */
/* Channel switch timing */
struct ieee80211_ch_switch_timing {
__le16 switch_time;
__le16 switch_timeout;
} __packed;
/* Link-id information element */
struct ieee80211_tdls_lnkie {
u8 ie_type; /* Link Identifier IE */
@ -1108,6 +1114,15 @@ struct ieee80211_tdls_data {
u8 dialog_token;
u8 variable[0];
} __packed discover_req;
struct {
u8 target_channel;
u8 oper_class;
u8 variable[0];
} __packed chan_switch_req;
struct {
__le16 status_code;
u8 variable[0];
} __packed chan_switch_resp;
} u;
} __packed;

2
net/mac80211/ieee80211_i.h
View file

@ -1400,6 +1400,8 @@ struct ieee802_11_elems {
size_t total_len;
/* pointers to IEs */
const struct ieee80211_tdls_lnkie *lnk_id;
const struct ieee80211_ch_switch_timing *ch_sw_timing;
const u8 *ext_capab;
const u8 *ssid;
const u8 *supp_rates;

16
net/mac80211/util.c
View file

@ -832,6 +832,8 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
case WLAN_EID_CHAN_SWITCH_PARAM:
case WLAN_EID_EXT_CAPABILITY:
case WLAN_EID_CHAN_SWITCH_TIMING:
case WLAN_EID_LINK_ID:
/*
* not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
* that if the content gets bigger it might be needed more than once
@ -851,6 +853,20 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
elem_parse_failed = false;
switch (id) {
case WLAN_EID_LINK_ID:
if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
elem_parse_failed = true;
break;
}
elems->lnk_id = (void *)(pos - 2);
break;
case WLAN_EID_CHAN_SWITCH_TIMING:
if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
elem_parse_failed = true;
break;
}
elems->ch_sw_timing = (void *)pos;
break;
case WLAN_EID_EXT_CAPABILITY:
elems->ext_capab = pos;
elems->ext_capab_len = elen;