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mac80211: split extra TDLS IEs in setup frames

Browse source 
When building TDLS setup frames, use the IE order mandates in the
specification, splitting extra IEs coming from usermode.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arik Nemtsov 2014-07-17 17:14:20 +03:00 committed by Johannes Berg
parent 46792a2dfc
commit f09a87d274
1 changed files with 70 additions and 7 deletions
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77
net/mac80211/tdls.c
View file

@ -78,25 +78,91 @@ static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
memcpy(lnkid->resp_sta, peer, ETH_ALEN);
}
static void
ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, const u8 *peer,
u8 action_code, const u8 *extra_ies,
size_t extra_ies_len)
{
enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
size_t offset = 0, noffset;
u8 *pos;
ieee80211_add_srates_ie(sdata, skb, false, band);
ieee80211_add_ext_srates_ie(sdata, skb, false, band);
/* add any custom IEs that go before Extended Capabilities */
if (extra_ies_len) {
static const u8 before_ext_cap[] = {
WLAN_EID_SUPP_RATES,
WLAN_EID_COUNTRY,
WLAN_EID_EXT_SUPP_RATES,
WLAN_EID_SUPPORTED_CHANNELS,
WLAN_EID_RSN,
};
noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
before_ext_cap,
ARRAY_SIZE(before_ext_cap),
offset);
pos = skb_put(skb, noffset - offset);
memcpy(pos, extra_ies + offset, noffset - offset);
offset = noffset;
}
ieee80211_tdls_add_ext_capab(skb);
/* add any custom IEs that go before HT capabilities */
if (extra_ies_len) {
static const u8 before_ht_cap[] = {
WLAN_EID_SUPP_RATES,
WLAN_EID_COUNTRY,
WLAN_EID_EXT_SUPP_RATES,
WLAN_EID_SUPPORTED_CHANNELS,
WLAN_EID_RSN,
WLAN_EID_EXT_CAPABILITY,
WLAN_EID_QOS_CAPA,
WLAN_EID_FAST_BSS_TRANSITION,
WLAN_EID_TIMEOUT_INTERVAL,
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
};
noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
before_ht_cap,
ARRAY_SIZE(before_ht_cap),
offset);
pos = skb_put(skb, noffset - offset);
memcpy(pos, extra_ies + offset, noffset - offset);
offset = noffset;
}
/* add any remaining IEs */
if (extra_ies_len) {
noffset = extra_ies_len;
pos = skb_put(skb, noffset - offset);
memcpy(pos, extra_ies + offset, noffset - offset);
}
}
static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, const u8 *peer,
u8 action_code, bool initiator,
const u8 *extra_ies, size_t extra_ies_len)
{
const u8 *init_addr, *rsp_addr;
enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
switch (action_code) {
case WLAN_TDLS_SETUP_REQUEST:
case WLAN_TDLS_SETUP_RESPONSE:
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
ieee80211_add_srates_ie(sdata, skb, false, band);
ieee80211_add_ext_srates_ie(sdata, skb, false, band);
ieee80211_tdls_add_ext_capab(skb);
ieee80211_tdls_add_setup_start_ies(sdata, skb, peer,
action_code, extra_ies,
extra_ies_len);
break;
case WLAN_TDLS_SETUP_CONFIRM:
case WLAN_TDLS_TEARDOWN:
case WLAN_TDLS_DISCOVERY_REQUEST:
if (extra_ies_len)
memcpy(skb_put(skb, extra_ies_len), extra_ies,
extra_ies_len);
break;
}
@ -108,9 +174,6 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
rsp_addr = sdata->vif.addr;
}
if (extra_ies_len)
memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
ieee80211_tdls_add_link_ie(skb, init_addr, rsp_addr,
sdata->u.mgd.bssid);
}