This patchset adds support for FILS discovery transmission as per
IEEE Std 802.11ai-2016.
This is the next version in the series given below:
FILS discovery and bcast probe resp support.
Unsolicited broadcast probe response support is now split into
a separate patchset.
Aloka Dixit (2):
nl80211: Add FILS discovery support
mac80211: Add FILS discovery transmission support
include/net/cfg80211.h | 25 ++++++++++++++++
include/net/mac80211.h | 31 ++++++++++++++++++++
include/uapi/linux/nl80211.h | 46 +++++++++++++++++++++++++++++
net/mac80211/cfg.c | 46 +++++++++++++++++++++++++++++
net/mac80211/ieee80211_i.h | 7 +++++
net/mac80211/tx.c | 25 ++++++++++++++++
net/wireless/nl80211.c | 57 ++++++++++++++++++++++++++++++++++++
7 files changed, 237 insertions(+)
--
2.25.0
This patch adds mac80211 support to configure FILS discovery
transmission.
Changes include functions to store and retrieve FILS discovery
template, minimum and maximum packet intervals, beacon response
window and option to omit replicated probe responses.
Signed-off-by: Aloka Dixit <[email protected]>
---
v3: Only FILS discovery related implementation
v2: FILS discovery and bcast probe resp support
include/net/mac80211.h | 31 +++++++++++++++++++++++++
net/mac80211/cfg.c | 46 ++++++++++++++++++++++++++++++++++++++
net/mac80211/ieee80211_i.h | 7 ++++++
net/mac80211/tx.c | 25 +++++++++++++++++++++
4 files changed, 109 insertions(+)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 11d5610d2ad5..19daa61ed22d 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -317,6 +317,7 @@ struct ieee80211_vif_chanctx_switch {
* @BSS_CHANGED_TWT: TWT status changed
* @BSS_CHANGED_HE_OBSS_PD: OBSS Packet Detection status changed.
* @BSS_CHANGED_HE_BSS_COLOR: BSS Color has changed
+ * @BSS_CHANGED_FILS_DISCOVERY: FILS discovery status changed.
*
*/
enum ieee80211_bss_change {
@@ -350,6 +351,7 @@ enum ieee80211_bss_change {
BSS_CHANGED_TWT = 1<<27,
BSS_CHANGED_HE_OBSS_PD = 1<<28,
BSS_CHANGED_HE_BSS_COLOR = 1<<29,
+ BSS_CHANGED_FILS_DISCOVERY = 1<<30,
/* when adding here, make sure to change ieee80211_reconfig */
};
@@ -490,6 +492,22 @@ struct ieee80211_ftm_responder_params {
size_t civicloc_len;
};
+/**
+ * struct ieee80211_fils_discovery - FILS discovery parameters from
+ * IEEE Std 802.11ai-2016, Annex C.3 MIB detail.
+ *
+ * @min_interval: Minimum packet interval in TUs (0 - 10000)
+ * @max_interval: Maximum packet interval in TUs (0 - 10000)
+ * @bcn_resp_win: Beacon response window in unit of 0.1 msec (0 - 1000000)
+ * @omit_replicate_probe_resp: Omit replicate_probe_response
+ */
+struct ieee80211_fils_discovery {
+ u32 min_interval;
+ u32 max_interval;
+ u32 bcn_resp_win;
+ bool omit_replicate_probe_resp;
+};
+
/**
* struct ieee80211_bss_conf - holds the BSS's changing parameters
*
@@ -607,6 +625,7 @@ struct ieee80211_ftm_responder_params {
* @he_oper: HE operation information of the AP we are connected to
* @he_obss_pd: OBSS Packet Detection parameters.
* @he_bss_color: BSS coloring settings, if BSS supports HE
+ * @fils_discovery: FILS discovery configuration
*/
struct ieee80211_bss_conf {
const u8 *bssid;
@@ -674,6 +693,7 @@ struct ieee80211_bss_conf {
} he_oper;
struct ieee80211_he_obss_pd he_obss_pd;
struct cfg80211_he_bss_color he_bss_color;
+ struct ieee80211_fils_discovery fils_discovery;
};
/**
@@ -6558,4 +6578,15 @@ u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
*/
bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable);
+/**
+ * ieee80211_get_fils_discovery_tmpl - Get FILS discovery template.
+ * @hw: pointer obtained from ieee80211_alloc_hw().
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * The driver is responsible for freeing the returned skb.
+ *
+ * Return: FILS discovery template. %NULL on error.
+ */
+struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif);
#endif /* MAC80211_H */
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9b360544ad6f..664602f145cf 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -837,6 +837,35 @@ static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
return 0;
}
+static int ieee80211_set_fils_discovery(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_fils_discovery *params)
+{
+ struct fils_discovery_data *new, *old = NULL;
+ struct ieee80211_fils_discovery *fd;
+
+ fd = &sdata->vif.bss_conf.fils_discovery;
+ fd->min_interval = params->min_interval;
+ fd->max_interval = params->max_interval;
+ fd->bcn_resp_win = params->bcn_resp_win;
+ fd->omit_replicate_probe_resp = params->omit_replicate_probe_resp;
+
+ if (!params->tmpl || !params->tmpl_len) /* Optional template */
+ return 0;
+
+ old = sdata_dereference(sdata->u.ap.fils_discovery, sdata);
+ new = kzalloc(sizeof(*new) + params->tmpl_len, GFP_KERNEL);
+ if (!new)
+ return -ENOMEM;
+ new->len = params->tmpl_len;
+ memcpy(new->data, params->tmpl, params->tmpl_len);
+ rcu_assign_pointer(sdata->u.ap.fils_discovery, new);
+
+ if (old)
+ kfree_rcu(old, rcu_head);
+
+ return 0;
+}
+
static int ieee80211_set_ftm_responder_params(
struct ieee80211_sub_if_data *sdata,
const u8 *lci, size_t lci_len,
@@ -1103,6 +1132,17 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
}
changed |= err;
+ if (params->fils_discovery.enabled) {
+ err = ieee80211_set_fils_discovery(sdata,
+ ¶ms->fils_discovery);
+ if (err < 0) {
+ ieee80211_vif_release_channel(sdata);
+ return err;
+ } else if (err == 0) {
+ changed |= BSS_CHANGED_FILS_DISCOVERY;
+ }
+ }
+
err = drv_start_ap(sdata->local, sdata);
if (err) {
old = sdata_dereference(sdata->u.ap.beacon, sdata);
@@ -1158,6 +1198,7 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
struct ieee80211_local *local = sdata->local;
struct beacon_data *old_beacon;
struct probe_resp *old_probe_resp;
+ struct fils_discovery_data *old_fils_discovery;
struct cfg80211_chan_def chandef;
sdata_assert_lock(sdata);
@@ -1166,6 +1207,8 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
if (!old_beacon)
return -ENOENT;
old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
+ old_fils_discovery = sdata_dereference(sdata->u.ap.fils_discovery,
+ sdata);
/* abort any running channel switch */
mutex_lock(&local->mtx);
@@ -1189,9 +1232,12 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
/* remove beacon and probe response */
RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
+ RCU_INIT_POINTER(sdata->u.ap.fils_discovery, NULL);
kfree_rcu(old_beacon, rcu_head);
if (old_probe_resp)
kfree_rcu(old_probe_resp, rcu_head);
+ if (old_fils_discovery)
+ kfree_rcu(old_fils_discovery, rcu_head);
kfree(sdata->vif.bss_conf.ftmr_params);
sdata->vif.bss_conf.ftmr_params = NULL;
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index ec1a71ac65f2..479c1691630b 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -272,6 +272,12 @@ struct probe_resp {
u8 data[];
};
+struct fils_discovery_data {
+ struct rcu_head rcu_head;
+ int len;
+ u8 data[0];
+};
+
struct ps_data {
/* yes, this looks ugly, but guarantees that we can later use
* bitmap_empty :)
@@ -287,6 +293,7 @@ struct ps_data {
struct ieee80211_if_ap {
struct beacon_data __rcu *beacon;
struct probe_resp __rcu *probe_resp;
+ struct fils_discovery_data __rcu *fils_discovery;
/* to be used after channel switch. */
struct cfg80211_beacon_data *next_beacon;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index e9ce658141f5..9c1044782561 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -4998,6 +4998,31 @@ struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
}
EXPORT_SYMBOL(ieee80211_proberesp_get);
+struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct sk_buff *skb = NULL;
+ struct fils_discovery_data *tmpl = NULL;
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+ if (sdata->vif.type != NL80211_IFTYPE_AP)
+ return NULL;
+
+ rcu_read_lock();
+ tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
+ if (!tmpl) {
+ rcu_read_unlock();
+ return NULL;
+ }
+
+ skb = dev_alloc_skb(tmpl->len);
+ if (skb)
+ skb_put_data(skb, tmpl->data, tmpl->len);
+ rcu_read_unlock();
+ return skb;
+}
+EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
+
struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
--
2.25.0
This patch adds new attributes to support FILS discovery transmission.
FILS discovery attribute, NL80211_ATTR_FILS_DISCOVERY, is nested which
supports following parameters (IEEE Std 802.11ai-2016, Annex C.3 MIB
detail):
(1) NL80211_FILS_DISCOVERY_INT_MIN - Minimum packet interval
(2) NL80211_FILS_DISCOVERY_INT_MAX - Maximum packet interval
(3) NL80211_FILS_DISCOVERY_BCN_RESP_WIN - Beacon response window
(4) NL80211_FILS_DISCOVERY_OMIT_REPLICATE_PROBE_RESP - Send single
broadcast probe response for multiple probe requests.
(5) NL80211_FILS_DISCOVERY_TMPL - Template data (optional)
Signed-off-by: Aloka Dixit <[email protected]>
---
v3: Only FILS discovery related implementation
v2: FILS discovery and bcast probe resp support
include/net/cfg80211.h | 25 ++++++++++++++++
include/uapi/linux/nl80211.h | 46 +++++++++++++++++++++++++++++
net/wireless/nl80211.c | 57 ++++++++++++++++++++++++++++++++++++
3 files changed, 128 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index b58ad1a3f695..8993bb9f93b3 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1047,6 +1047,29 @@ struct cfg80211_acl_data {
struct mac_address mac_addrs[];
};
+/**
+ * struct cfg80211_fils_discovery - FILS discovery parameters from
+ * IEEE Std 802.11ai-2016, Annex C.3 MIB detail.
+ *
+ * @enabled: Set to true if FILS discovery transmission is enabled
+ * @min_interval: Minimum packet interval in TUs (0 - 10000)
+ * @max_interval: Maximum packet interval in TUs (0 - 10000)
+ * @bcn_resp_win: Beacon response window in unit of 0.1 msec (0 - 1000000)
+ * @omit_replicate_probe_resp: Omit replicate_probe_response
+ * @tmpl_len: Template length
+ * @tmpl: Template data from IEEE Std 802.11ai-2016 9.6.8.36 FILS discovery
+ * frame (Figure 9-687a).
+ */
+struct cfg80211_fils_discovery {
+ bool enabled;
+ u32 min_interval;
+ u32 max_interval;
+ u32 bcn_resp_win;
+ bool omit_replicate_probe_resp;
+ size_t tmpl_len;
+ const u8 *tmpl;
+};
+
/**
* enum cfg80211_ap_settings_flags - AP settings flags
*
@@ -1094,6 +1117,7 @@ enum cfg80211_ap_settings_flags {
* @he_obss_pd: OBSS Packet Detection settings
* @he_bss_color: BSS Color settings
* @he_oper: HE operation IE (or %NULL if HE isn't enabled)
+ * @fils_discovery: FILS discovery transmission parameters
*/
struct cfg80211_ap_settings {
struct cfg80211_chan_def chandef;
@@ -1124,6 +1148,7 @@ struct cfg80211_ap_settings {
u32 flags;
struct ieee80211_he_obss_pd he_obss_pd;
struct cfg80211_he_bss_color he_bss_color;
+ struct cfg80211_fils_discovery fils_discovery;
};
/**
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index dad8c8f8581f..a5dad7a27acc 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2505,6 +2505,10 @@ enum nl80211_commands {
* @NL80211_ATTR_HE_6GHZ_CAPABILITY: HE 6 GHz Band Capability element (from
* association request when used with NL80211_CMD_NEW_STATION).
*
+ * @NL80211_ATTR_FILS_DISCOVERY: Optional parameter to configure FILS
+ * discovery. It is a nested attribute, see
+ * &enum nl80211_fils_discovery_attributes.
+ *
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -2987,6 +2991,8 @@ enum nl80211_attrs {
NL80211_ATTR_HE_6GHZ_CAPABILITY,
+ NL80211_ATTR_FILS_DISCOVERY,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -6922,4 +6928,44 @@ enum nl80211_iftype_akm_attributes {
NL80211_IFTYPE_AKM_ATTR_MAX = __NL80211_IFTYPE_AKM_ATTR_LAST - 1,
};
+/**
+ * enum nl80211_fils_discovery_attributes - FILS discovery configuration
+ * from IEEE Std 802.11ai-2016, Annex C.3 MIB detail.
+ *
+ * @__NL80211_FILS_DISCOVERY_INVALID: Invalid
+ *
+ * @NL80211_FILS_DISCOVERY_INT_MIN: Minimum packet interval (u32, TU).
+ * Allowed range: 0..10000 (TU = Time Unit)
+ * @NL80211_FILS_DISCOVERY_INT_MAX: Maximum packet interval (u32, TU).
+ * Allowed range: 0..10000 (TU = Time Unit)
+ * @NL80211_FILS_DISCOVERY_BCN_RESP_WIN: Beacon response window (u32, 0.1 msec)
+ * Allowed range: 0..1000000
+ * Device doesn't respond to a probe request if the duration until next
+ * TBTT is less than this value.
+ * @NL80211_FILS_DISCOVERY_OMIT_REPLICATE_PROBE_RESP: Omit replicated probe
+ * responses (flag).
+ * If set to true, the device may send a single broadcast probe response
+ * for one or more probe requests instead of individual responses.
+ * @NL80211_FILS_DISCOVERY_TMPL: Optional FILS discovery template.
+ * It has contents of IEEE Std 802.11ai-2016 9.6.8.36 FILS discovery frame
+ * (Figure 9-687a).
+ * It may include 6GHz specific data specified in IEEE P802.11ax/D6.0,
+ * 9.6.7.36 FILS Discovery frame format.
+ *
+ * @__NL80211_FILS_DISCOVERY_LAST: Internal
+ * @NL80211_FILS_DISCOVERY_MAX: highest attribute
+ */
+enum nl80211_fils_discovery_attributes {
+ __NL80211_FILS_DISCOVERY_INVALID,
+
+ NL80211_FILS_DISCOVERY_INT_MIN,
+ NL80211_FILS_DISCOVERY_INT_MAX,
+ NL80211_FILS_DISCOVERY_BCN_RESP_WIN,
+ NL80211_FILS_DISCOVERY_OMIT_REPLICATE_PROBE_RESP,
+ NL80211_FILS_DISCOVERY_TMPL,
+
+ /* keep last */
+ __NL80211_FILS_DISCOVERY_LAST,
+ NL80211_FILS_DISCOVERY_MAX = __NL80211_FILS_DISCOVERY_LAST - 1
+};
#endif /* __LINUX_NL80211_H */
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 263ae395ad44..04f50ea67f25 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -360,6 +360,16 @@ nl80211_tid_config_attr_policy[NL80211_TID_CONFIG_ATTR_MAX + 1] = {
NLA_POLICY_NESTED(nl80211_txattr_policy),
};
+static const struct nla_policy
+fils_discovery_policy[NL80211_FILS_DISCOVERY_MAX + 1] = {
+ [NL80211_FILS_DISCOVERY_INT_MIN] = NLA_POLICY_MAX(NLA_U32, 10000),
+ [NL80211_FILS_DISCOVERY_INT_MAX] = NLA_POLICY_MAX(NLA_U32, 10000),
+ [NL80211_FILS_DISCOVERY_BCN_RESP_WIN] = { .type = NLA_U32 },
+ [NL80211_FILS_DISCOVERY_OMIT_REPLICATE_PROBE_RESP] = { .type = NLA_FLAG },
+ [NL80211_FILS_DISCOVERY_TMPL] = { .type = NLA_BINARY,
+ .len = IEEE80211_MAX_DATA_LEN }
+};
+
static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD },
[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
@@ -658,6 +668,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
.type = NLA_EXACT_LEN,
.len = sizeof(struct ieee80211_he_6ghz_capa),
},
+ [NL80211_ATTR_FILS_DISCOVERY] =
+ NLA_POLICY_NESTED(fils_discovery_policy),
};
/* policy for the key attributes */
@@ -4721,6 +4733,44 @@ static int nl80211_parse_he_bss_color(struct nlattr *attrs,
return 0;
}
+static int nl80211_parse_fils_discovery(struct nlattr *attrs,
+ struct cfg80211_ap_settings *params)
+{
+ struct nlattr *tmpl;
+ struct nlattr *tb[NL80211_FILS_DISCOVERY_MAX + 1];
+ int ret;
+ struct cfg80211_fils_discovery *fd = ¶ms->fils_discovery;
+
+ ret = nla_parse_nested(tb, NL80211_FILS_DISCOVERY_MAX, attrs,
+ fils_discovery_policy, NULL);
+ if (ret)
+ return ret;
+
+ if (!tb[NL80211_FILS_DISCOVERY_INT_MIN] ||
+ !tb[NL80211_FILS_DISCOVERY_INT_MAX] ||
+ !tb[NL80211_FILS_DISCOVERY_BCN_RESP_WIN])
+ return -EINVAL;
+
+ fd->enabled = true;
+ fd->min_interval = nla_get_u32(tb[NL80211_FILS_DISCOVERY_INT_MIN]);
+ fd->max_interval = nla_get_u32(tb[NL80211_FILS_DISCOVERY_INT_MAX]);
+ fd->bcn_resp_win =
+ nla_get_u32(tb[NL80211_FILS_DISCOVERY_BCN_RESP_WIN]);
+ if (fd->bcn_resp_win > 1000000)
+ fd->bcn_resp_win = 1000000;
+
+ fd->omit_replicate_probe_resp =
+ nla_get_flag(tb[NL80211_FILS_DISCOVERY_OMIT_REPLICATE_PROBE_RESP]);
+
+ tmpl = tb[NL80211_FILS_DISCOVERY_TMPL];
+ if (tmpl) {
+ fd->tmpl = nla_data(tmpl);
+ fd->tmpl_len = nla_len(tmpl);
+ }
+
+ return 0;
+}
+
static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
const u8 *rates)
{
@@ -5027,6 +5077,13 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
return err;
}
+ if (info->attrs[NL80211_ATTR_FILS_DISCOVERY]) {
+ err = nl80211_parse_fils_discovery(info->attrs[NL80211_ATTR_FILS_DISCOVERY],
+ ¶ms);
+ if (err)
+ return err;
+ }
+
nl80211_calculate_ap_params(¶ms);
if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])
--
2.25.0
On 6/2/2020 3:38 AM, Aloka Dixit wrote:
> This patchset adds support for FILS discovery transmission as per
> IEEE Std 802.11ai-2016.
>
> This is the next version in the series given below:
> FILS discovery and bcast probe resp support.
> Unsolicited broadcast probe response support is now split into
> a separate patchset.
Hi Aloka,
What is your motivation for the split? As you stated earlier FILS
discovery and unsollicited probe responses are mutual exclusive as it
only eats up airtime to do both. I tend to agree to that earlier
statement so I would like to see some arguments for doing the split.
Regards,
Arend
> Aloka Dixit (2):
> nl80211: Add FILS discovery support
> mac80211: Add FILS discovery transmission support
>
> include/net/cfg80211.h | 25 ++++++++++++++++
> include/net/mac80211.h | 31 ++++++++++++++++++++
> include/uapi/linux/nl80211.h | 46 +++++++++++++++++++++++++++++
> net/mac80211/cfg.c | 46 +++++++++++++++++++++++++++++
> net/mac80211/ieee80211_i.h | 7 +++++
> net/mac80211/tx.c | 25 ++++++++++++++++
> net/wireless/nl80211.c | 57 ++++++++++++++++++++++++++++++++++++
> 7 files changed, 237 insertions(+)
>
On 2020-06-04 00:38, Arend Van Spriel wrote:
> On 6/2/2020 3:38 AM, Aloka Dixit wrote:
>> This patchset adds support for FILS discovery transmission as per
>> IEEE Std 802.11ai-2016.
>>
>> This is the next version in the series given below:
>> FILS discovery and bcast probe resp support.
>> Unsolicited broadcast probe response support is now split into
>> a separate patchset.
>
> Hi Aloka,
>
> What is your motivation for the split? As you stated earlier FILS
> discovery and unsollicited probe responses are mutual exclusive as it
> only eats up airtime to do both. I tend to agree to that earlier
> statement so I would like to see some arguments for doing the split.
>
Hi Arend,
Two reasons to split the patches:
(1) Unsolicited broadcast probe response is specific to 6GHz whereas
FILS discovery is applicable in all bands. I haven't added a check for
6GHz for the former in nl80211 and mac80211 code because I expect the
application and driver implementations to add it.
(2) IEEE P802.11ax/D6.0 mentions that a device "may" skip FILS discovery
transmission and instead schedule unsolicited broadcast probe response
(if enabled) in 6GHz, but it is not mandatory.
So it made sense to have two separate attributes and let the driver
and/or FW implementation decide if both can be active at the same time.
nl80211 and mac80211 shouldn't make that decision.
With separate attributes, having separate patches are easier to review.
> Regards,
> Arend
>
>> Aloka Dixit (2):
>> nl80211: Add FILS discovery support
>> mac80211: Add FILS discovery transmission support
>>
>> include/net/cfg80211.h | 25 ++++++++++++++++
>> include/net/mac80211.h | 31 ++++++++++++++++++++
>> include/uapi/linux/nl80211.h | 46 +++++++++++++++++++++++++++++
>> net/mac80211/cfg.c | 46 +++++++++++++++++++++++++++++
>> net/mac80211/ieee80211_i.h | 7 +++++
>> net/mac80211/tx.c | 25 ++++++++++++++++
>> net/wireless/nl80211.c | 57
>> ++++++++++++++++++++++++++++++++++++
>> 7 files changed, 237 insertions(+)
>>
On 2020-06-13 17:47, Aloka Dixit wrote:
> On 2020-06-04 00:38, Arend Van Spriel wrote:
>> On 6/2/2020 3:38 AM, Aloka Dixit wrote:
>>> This patchset adds support for FILS discovery transmission as per
>>> IEEE Std 802.11ai-2016.
>>>
>>> This is the next version in the series given below:
>>> FILS discovery and bcast probe resp support.
>>> Unsolicited broadcast probe response support is now split into
>>> a separate patchset.
>>
>> Hi Aloka,
>>
>> What is your motivation for the split? As you stated earlier FILS
>> discovery and unsollicited probe responses are mutual exclusive as it
>> only eats up airtime to do both. I tend to agree to that earlier
>> statement so I would like to see some arguments for doing the split.
>>
>
> Hi Arend,
> Two reasons to split the patches:
> (1) Unsolicited broadcast probe response is specific to 6GHz whereas
> FILS discovery is applicable in all bands. I haven't added a check for
> 6GHz for the former in nl80211 and mac80211 code because I expect the
> application and driver implementations to add it.
> (2) IEEE P802.11ax/D6.0 mentions that a device "may" skip FILS
> discovery transmission and instead schedule unsolicited broadcast
> probe response (if enabled) in 6GHz, but it is not mandatory.
> So it made sense to have two separate attributes and let the driver
> and/or FW implementation decide if both can be active at the same
> time. nl80211 and mac80211 shouldn't make that decision.
> With separate attributes, having separate patches are easier to review.
>
>
The second point I added above is not entirely correct - if unsolicited
broadcast response is active then FILS discovery must be omitted, but if
it is not active, then also device may choose to send probe response
instead of FILS discovery.
But that decision should not be made at nl80211 or mac80211.
>> Regards,
>> Arend
>>
>>> Aloka Dixit (2):
>>> nl80211: Add FILS discovery support
>>> mac80211: Add FILS discovery transmission support
>>>
>>> include/net/cfg80211.h | 25 ++++++++++++++++
>>> include/net/mac80211.h | 31 ++++++++++++++++++++
>>> include/uapi/linux/nl80211.h | 46 +++++++++++++++++++++++++++++
>>> net/mac80211/cfg.c | 46 +++++++++++++++++++++++++++++
>>> net/mac80211/ieee80211_i.h | 7 +++++
>>> net/mac80211/tx.c | 25 ++++++++++++++++
>>> net/wireless/nl80211.c | 57
>>> ++++++++++++++++++++++++++++++++++++
>>> 7 files changed, 237 insertions(+)
>>>