From patchwork Wed Jul 15 23:05:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aloka Dixit X-Patchwork-Id: 11666427 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 664F417C5 for ; Wed, 15 Jul 2020 23:05:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 491392065D for ; Wed, 15 Jul 2020 23:05:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="AOJnCstK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726986AbgGOXF3 (ORCPT ); Wed, 15 Jul 2020 19:05:29 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:64626 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726578AbgGOXF2 (ORCPT ); Wed, 15 Jul 2020 19:05:28 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1594854327; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=fVm5bhZrXZ3cqvDPhcIHbSekphBXcIX4s/OyZPjhb5E=; b=AOJnCstKqHcbtQER5FO3UoZ+tEEemwW02367WWlWdwDIl59WdCJJ1sAWoCUnRPfgkC4m0dyd X5sePHhWI3LrkncaIIZLoqMYJeLQpawJ0XyMhdc1LRYgfSXpSIULFCUVjI9OJQDPx0I8DXpi rtKSMn+r04MnyyLP/uqfKY1j/To= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n20.prod.us-west-2.postgun.com with SMTP id 5f0f8bb12991e765cdde6e13 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 15 Jul 2020 23:05:21 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 54FFDC433C9; Wed, 15 Jul 2020 23:05:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from alokad-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: alokad) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3BF2BC433CA; Wed, 15 Jul 2020 23:05:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3BF2BC433CA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=alokad@codeaurora.org From: Aloka Dixit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Aloka Dixit Subject: [PATCH v3 1/2] nl80211: Unsolicited broadcast probe response support Date: Wed, 15 Jul 2020 16:05:13 -0700 Message-Id: <20200715230514.26792-2-alokad@codeaurora.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200715230514.26792-1-alokad@codeaurora.org> References: <20200715230514.26792-1-alokad@codeaurora.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This patch adds new attributes to support unsolicited broadcast probe response transmission used for in-band discovery in 6GHz band (IEEE P802.11ax/D6.0 26.17.2.3.2, AP behavior for fast passive scanning). The new attribute, NL80211_ATTR_UNSOL_BCAST_PROBE_RESP, is nested which supports following parameters: (1) NL80211_UNSOL_BCAST_PROBE_RESP_INT - Packet interval (2) NL80211_UNSOL_BCAST_PROBE_RESP_TMPL - Template data Signed-off-by: Aloka Dixit --- include/net/cfg80211.h | 18 ++++++++++++++ include/uapi/linux/nl80211.h | 32 ++++++++++++++++++++++++ net/wireless/nl80211.c | 47 ++++++++++++++++++++++++++++++++++++ 3 files changed, 97 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index fc7e8807838d..884050bf5c74 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1047,6 +1047,22 @@ struct cfg80211_acl_data { struct mac_address mac_addrs[]; }; +/** + * struct cfg80211_unsol_bcast_probe_resp - Unsolicited broadcast probe + * response parameters in 6GHz. + * + * @interval: Packet interval in TUs. Maximum allowed is 20 TU, as mentioned + * in IEEE P802.11ax/D6.0 26.17.2.3.2 - AP behavior for fast passive + * scanning + * @tmpl_len: Template length + * @tmpl: Template data for probe response + */ +struct cfg80211_unsol_bcast_probe_resp { + u32 interval; + size_t tmpl_len; + const u8 *tmpl; +}; + /** * enum cfg80211_ap_settings_flags - AP settings flags * @@ -1094,6 +1110,7 @@ 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) + * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters */ struct cfg80211_ap_settings { struct cfg80211_chan_def chandef; @@ -1124,6 +1141,7 @@ struct cfg80211_ap_settings { u32 flags; struct ieee80211_he_obss_pd he_obss_pd; struct cfg80211_he_bss_color he_bss_color; + struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp; }; /** diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 4e6339ab1fce..f3e6a37f0df8 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_UNSOL_BCAST_PROBE_RESP: Optional parameter to configure + * unsolicited broadcast probe response. It is a nested attribute, see + * &enum nl80211_unsol_bcast_probe_resp_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_UNSOL_BCAST_PROBE_RESP, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -6922,4 +6928,30 @@ enum nl80211_iftype_akm_attributes { NL80211_IFTYPE_AKM_ATTR_MAX = __NL80211_IFTYPE_AKM_ATTR_LAST - 1, }; +/** + * enum nl80211_unsol_bcast_probe_resp_attributes - Unsolicited broadcast probe + * response configuration. Applicable only in 6GHz. + * + * @__NL80211_UNSOL_BCAST_PROBE_RESP_INVALID: Invalid + * + * @NL80211_UNSOL_BCAST_PROBE_RESP_INT: Maximum packet interval (u32, TU). + * Allowed range: 0..20 (TU = Time Unit). IEEE P802.11ax/D6.0 + * 26.17.2.3.2 (AP behavior for fast passive scanning. + * @NL80211_UNSOL_BCAST_PROBE_RESP_TMPL: Unsolicited broadcast probe response + * frame template (binary). + * + * @__NL80211_UNSOL_BCAST_PROBE_RESP_LAST: Internal + * @NL80211_UNSOL_BCAST_PROBE_RESP_MAX: highest attribute + */ +enum nl80211_unsol_bcast_probe_resp_attributes { + __NL80211_UNSOL_BCAST_PROBE_RESP_INVALID, + + NL80211_UNSOL_BCAST_PROBE_RESP_INT, + NL80211_UNSOL_BCAST_PROBE_RESP_TMPL, + + /* keep last */ + __NL80211_UNSOL_BCAST_PROBE_RESP_LAST, + NL80211_UNSOL_BCAST_PROBE_RESP_MAX = + __NL80211_UNSOL_BCAST_PROBE_RESP_LAST - 1 +}; #endif /* __LINUX_NL80211_H */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 263ae395ad44..d42056421e55 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -338,6 +338,13 @@ static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = { [NL80211_TXRATE_GI] = { .type = NLA_U8 }, }; +static const struct nla_policy +unsol_bcast_probe_resp_policy[NL80211_UNSOL_BCAST_PROBE_RESP_MAX + 1] = { + [NL80211_UNSOL_BCAST_PROBE_RESP_INT] = NLA_POLICY_MAX(NLA_U32, 20), + [NL80211_UNSOL_BCAST_PROBE_RESP_TMPL] = { .type = NLA_BINARY, + .len = IEEE80211_MAX_DATA_LEN } +}; + static const struct nla_policy nl80211_tid_config_attr_policy[NL80211_TID_CONFIG_ATTR_MAX + 1] = { [NL80211_TID_CONFIG_ATTR_VIF_SUPP] = { .type = NLA_U64 }, @@ -658,6 +665,9 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { .type = NLA_EXACT_LEN, .len = sizeof(struct ieee80211_he_6ghz_capa), }, + + [NL80211_ATTR_UNSOL_BCAST_PROBE_RESP] = + NLA_POLICY_NESTED(unsol_bcast_probe_resp_policy), }; /* policy for the key attributes */ @@ -4721,6 +4731,35 @@ static int nl80211_parse_he_bss_color(struct nlattr *attrs, return 0; } +static int +nl80211_parse_unsol_bcast_probe_resp(struct nlattr *attrs, + struct cfg80211_ap_settings *params) +{ + struct nlattr *tmpl; + struct nlattr *tb[NL80211_UNSOL_BCAST_PROBE_RESP_MAX + 1]; + int ret; + struct cfg80211_unsol_bcast_probe_resp *presp = + ¶ms->unsol_bcast_probe_resp; + + ret = nla_parse_nested(tb, NL80211_UNSOL_BCAST_PROBE_RESP_MAX, attrs, + unsol_bcast_probe_resp_policy, NULL); + if (ret) + return ret; + + if (!tb[NL80211_UNSOL_BCAST_PROBE_RESP_INT]) + return -EINVAL; + + presp->interval = nla_get_u32(tb[NL80211_UNSOL_BCAST_PROBE_RESP_INT]); + + tmpl = tb[NL80211_UNSOL_BCAST_PROBE_RESP_TMPL]; + if (tmpl) { + presp->tmpl = nla_data(tmpl); + presp->tmpl_len = nla_len(tmpl); + } + + return 0; +} + static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params, const u8 *rates) { @@ -5027,6 +5066,14 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) return err; } + if (info->attrs[NL80211_ATTR_UNSOL_BCAST_PROBE_RESP]) { + err = nl80211_parse_unsol_bcast_probe_resp( + info->attrs[NL80211_ATTR_UNSOL_BCAST_PROBE_RESP], + ¶ms); + if (err) + return err; + } + nl80211_calculate_ap_params(¶ms); if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT]) From patchwork Wed Jul 15 23:05:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aloka Dixit X-Patchwork-Id: 11666429 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8273C17C7 for ; 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Wed, 15 Jul 2020 23:05:23 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 552E5C433C9; Wed, 15 Jul 2020 23:05:23 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from alokad-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: alokad) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9AA9AC433C6; Wed, 15 Jul 2020 23:05:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 9AA9AC433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=alokad@codeaurora.org From: Aloka Dixit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Aloka Dixit Subject: [PATCH v3 2/2] mac80211: Unsolicited broadcast probe response support Date: Wed, 15 Jul 2020 16:05:14 -0700 Message-Id: <20200715230514.26792-3-alokad@codeaurora.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200715230514.26792-1-alokad@codeaurora.org> References: <20200715230514.26792-1-alokad@codeaurora.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This patch adds mac80211 support to configure unsolicited broadcast probe response transmission for in-band discovery in 6GHz. Changes include functions to store and retrieve probe response template, and packet interval (0 - 20 TUs). Setting interval to 0 disables the unsolicited broadcast probe response transmission. Signed-off-by: Aloka Dixit --- include/net/mac80211.h | 21 +++++++++++++++++++ net/mac80211/cfg.c | 42 ++++++++++++++++++++++++++++++++++++++ net/mac80211/ieee80211_i.h | 7 +++++++ net/mac80211/tx.c | 26 +++++++++++++++++++++++ 4 files changed, 96 insertions(+) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 11d5610d2ad5..90800558725c 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -317,6 +317,8 @@ 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_UNSOL_BCAST_PROBE_RESP: Unsolicited broadcast probe response + * status changed. * */ enum ieee80211_bss_change { @@ -350,6 +352,7 @@ 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_UNSOL_BCAST_PROBE_RESP = 1<<30, /* when adding here, make sure to change ieee80211_reconfig */ }; @@ -607,6 +610,8 @@ 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 + * @unsol_bcast_probe_resp_interval: Unsolicited broadcast probe response + * interval. */ struct ieee80211_bss_conf { const u8 *bssid; @@ -674,6 +679,7 @@ struct ieee80211_bss_conf { } he_oper; struct ieee80211_he_obss_pd he_obss_pd; struct cfg80211_he_bss_color he_bss_color; + u32 unsol_bcast_probe_resp_interval; }; /** @@ -6558,4 +6564,19 @@ u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw, */ bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable); + +/** + * ieee80211_get_unsol_bcast_probe_resp_tmpl - Get unsolicited broadcast + * probe response 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: Unsolicited broadcast probe response template. %NULL on error. + */ +struct sk_buff * +ieee80211_get_unsol_bcast_probe_resp_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..3db24325f545 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -837,6 +837,32 @@ static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata, return 0; } +static int +ieee80211_set_unsol_bcast_probe_resp(struct ieee80211_sub_if_data *sdata, + struct cfg80211_unsol_bcast_probe_resp *params) +{ + struct unsol_bcast_probe_resp_data *new, *old = NULL; + + sdata->vif.bss_conf.unsol_bcast_probe_resp_interval = + params->interval; + + if (!params->tmpl || !params->tmpl_len) /* Optional template */ + return 0; + + old = sdata_dereference(sdata->u.ap.unsol_bcast_probe_resp, 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.unsol_bcast_probe_resp, 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 +1129,15 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, } changed |= err; + err = ieee80211_set_unsol_bcast_probe_resp(sdata, + ¶ms->unsol_bcast_probe_resp); + if (err < 0) { + ieee80211_vif_release_channel(sdata); + return err; + } else if (err == 0) { + changed |= BSS_CHANGED_UNSOL_BCAST_PROBE_RESP; + } + err = drv_start_ap(sdata->local, sdata); if (err) { old = sdata_dereference(sdata->u.ap.beacon, sdata); @@ -1158,6 +1193,7 @@ 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 unsol_bcast_probe_resp_data *old_unsol_bcast_probe_resp; struct cfg80211_chan_def chandef; sdata_assert_lock(sdata); @@ -1166,6 +1202,9 @@ 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_unsol_bcast_probe_resp = + sdata_dereference(sdata->u.ap.unsol_bcast_probe_resp, + sdata); /* abort any running channel switch */ mutex_lock(&local->mtx); @@ -1189,9 +1228,12 @@ 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.unsol_bcast_probe_resp, NULL); kfree_rcu(old_beacon, rcu_head); if (old_probe_resp) kfree_rcu(old_probe_resp, rcu_head); + if (old_unsol_bcast_probe_resp) + kfree_rcu(old_unsol_bcast_probe_resp, 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..b54108ef3560 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -272,6 +272,12 @@ struct probe_resp { u8 data[]; }; +struct unsol_bcast_probe_resp_data { + struct rcu_head rcu_head; + int len; + u8 data[]; +}; + 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 unsol_bcast_probe_resp_data __rcu *unsol_bcast_probe_resp; /* 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..3657dc799ca5 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -4998,6 +4998,32 @@ struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, } EXPORT_SYMBOL(ieee80211_proberesp_get); +struct sk_buff * +ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct sk_buff *skb = NULL; + struct unsol_bcast_probe_resp_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.unsol_bcast_probe_resp); + 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_unsol_bcast_probe_resp_tmpl); + struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif) {