From patchwork Tue Nov 3 09:17:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Crispin X-Patchwork-Id: 11876379 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 A00246A2 for ; Tue, 3 Nov 2020 09:17:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8296E22409 for ; Tue, 3 Nov 2020 09:17:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727328AbgKCJR5 (ORCPT ); Tue, 3 Nov 2020 04:17:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725993AbgKCJRw (ORCPT ); Tue, 3 Nov 2020 04:17:52 -0500 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44C9FC0617A6 for ; Tue, 3 Nov 2020 01:17:52 -0800 (PST) Received: from [149.224.151.57] (helo=localhost.localdomain) by ds12 with esmtpa (Exim 4.89) (envelope-from ) id 1kZsRo-0006BN-Pb; Tue, 03 Nov 2020 10:17:48 +0100 From: John Crispin To: Johannes Berg Cc: linux-wireless@vger.kernel.org, John Crispin , Aloka Dixit Subject: [PATCH V5 1/4] nl80211: add basic multiple bssid support Date: Tue, 3 Nov 2020 10:17:40 +0100 Message-Id: <20201103091743.1924854-2-john@phrozen.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201103091743.1924854-1-john@phrozen.org> References: <20201103091743.1924854-1-john@phrozen.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This patch adds support for passing the multiple bssid config to the kernel when an AP gets started. If the BSS is non-transmitting we need to pass * the ifidx of the transmitting parent * the BSS index in the set * the BSS count of the set * flag indicating if we want to do EMA * the multiple bssid elements as an array inside the beacon data This allows use to generate multiple bssid beacons aswell as EMA ones. Signed-off-by: Aloka Dixit Signed-off-by: John Crispin --- include/net/cfg80211.h | 33 +++++++++++++++++++++++++++++++++ include/uapi/linux/nl80211.h | 21 +++++++++++++++++++++ net/wireless/nl80211.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 88 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 661edfc8722e..0be0c11c95fd 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -497,6 +497,21 @@ struct ieee80211_supported_band { const struct ieee80211_sband_iftype_data *iftype_data; }; +/** + * struct ieee80211_multiple_bssid - AP settings for multi bssid + * + * @index: the index of this AP in the multi bssid group. + * @count: the total number of multi bssid peer APs. + * @parent: non-transmitted BSSs transmitted parents index + * @ema: Shall the beacons be sent out in EMA mode. + */ +struct ieee80211_multiple_bssid { + u8 index; + u8 count; + u32 parent; + bool ema; +}; + /** * ieee80211_get_sband_iftype_data - return sband data for a given iftype * @sband: the sband to search for the STA on @@ -1028,6 +1043,19 @@ struct cfg80211_crypto_settings { u8 sae_pwd_len; }; +/** + * struct cfg80211_multiple_bssid_data - multiple_bssid data + * @ies: array of extra information element(s) to add into Beacon frames for multiple + * bssid or %NULL + * @len: array of lengths of multiple_bssid.ies in octets + * @cnt: number of entries in multiple_bssid.ies + */ +struct cfg80211_multiple_bssid_data { + u8 *ies[NL80211_MULTIPLE_BSSID_IES_MAX]; + size_t len[NL80211_MULTIPLE_BSSID_IES_MAX]; + int cnt; +}; + /** * struct cfg80211_beacon_data - beacon data * @head: head portion of beacon (before TIM IE) @@ -1054,6 +1082,7 @@ struct cfg80211_crypto_settings { * Token (measurement type 11) * @lci_len: LCI data length * @civicloc_len: Civic location data length + * @multiple_bssid: multiple_bssid data */ struct cfg80211_beacon_data { const u8 *head, *tail; @@ -1072,6 +1101,8 @@ struct cfg80211_beacon_data { size_t probe_resp_len; size_t lci_len; size_t civicloc_len; + + struct cfg80211_multiple_bssid_data multiple_bssid; }; struct mac_address { @@ -1176,6 +1207,7 @@ enum cfg80211_ap_settings_flags { * @he_oper: HE operation IE (or %NULL if HE isn't enabled) * @fils_discovery: FILS discovery transmission parameters * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters + * @multiple_bssid: AP settings for multiple bssid */ struct cfg80211_ap_settings { struct cfg80211_chan_def chandef; @@ -1208,6 +1240,7 @@ struct cfg80211_ap_settings { struct cfg80211_he_bss_color he_bss_color; struct cfg80211_fils_discovery fils_discovery; struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp; + struct ieee80211_multiple_bssid multiple_bssid; }; /** diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 47700a2b9af9..91b338b0b9cb 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -2527,6 +2527,19 @@ enum nl80211_commands { * override mask. Used with NL80211_ATTR_S1G_CAPABILITY in * NL80211_CMD_ASSOCIATE or NL80211_CMD_CONNECT. * + * @NL80211_ATTR_MULTIPLE_BSSID_PARENT: If this is a Non-Transmitted BSSID, define + * the parent (transmitting) interface. + * + * @NL80211_ATTR_MULTIPLE_BSSID_INDEX: The index of this BSS inside the multi bssid + * element. + * + * @NL80211_ATTR_MULTIPLE_BSSID_COUNT: The number of BSSs inside the multi bssid element. + * + * @NL80211_ATTR_MULTIPLE_BSSID_IES: The Elements that describe our multiple BSS group. + * these get passed separately as the kernel might need to split them up for EMA VAP. + * + * @NL80211_ATTR_MULTIPLE_BSSID_EMA: Shall the multiple BSS beacons be sent out in EMA mode. + * * @NUM_NL80211_ATTR: total number of nl80211_attrs available * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use @@ -3016,6 +3029,12 @@ enum nl80211_attrs { NL80211_ATTR_S1G_CAPABILITY, NL80211_ATTR_S1G_CAPABILITY_MASK, + NL80211_ATTR_MULTIPLE_BSSID_PARENT, + NL80211_ATTR_MULTIPLE_BSSID_INDEX, + NL80211_ATTR_MULTIPLE_BSSID_COUNT, + NL80211_ATTR_MULTIPLE_BSSID_IES, + NL80211_ATTR_MULTIPLE_BSSID_EMA, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -3079,6 +3098,8 @@ enum nl80211_attrs { #define NL80211_CQM_TXE_MAX_INTVL 1800 +#define NL80211_MULTIPLE_BSSID_IES_MAX 8 + /** * enum nl80211_iftype - (virtual) interface types * diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 554796a6c6fe..45765d033d05 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -715,6 +715,11 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { NLA_POLICY_EXACT_LEN(IEEE80211_S1G_CAPABILITY_LEN), [NL80211_ATTR_S1G_CAPABILITY_MASK] = NLA_POLICY_EXACT_LEN(IEEE80211_S1G_CAPABILITY_LEN), + [NL80211_ATTR_MULTIPLE_BSSID_PARENT] = { .type = NLA_U32 }, + [NL80211_ATTR_MULTIPLE_BSSID_INDEX] = { .type = NLA_U8 }, + [NL80211_ATTR_MULTIPLE_BSSID_COUNT] = NLA_POLICY_RANGE(NLA_U8, 1, 16), + [NL80211_ATTR_MULTIPLE_BSSID_IES] = { .type = NLA_NESTED }, + [NL80211_ATTR_MULTIPLE_BSSID_EMA] = { .type = NLA_FLAG }, }; /* policy for the key attributes */ @@ -4867,6 +4872,21 @@ static int nl80211_parse_beacon(struct cfg80211_registered_device *rdev, bcn->ftm_responder = -1; } + if (attrs[NL80211_ATTR_MULTIPLE_BSSID_IES]) { + struct nlattr *nl_ie; + int rem_ie; + + nla_for_each_nested(nl_ie, attrs[NL80211_ATTR_MULTIPLE_BSSID_IES], rem_ie) { + if (bcn->multiple_bssid.cnt > NL80211_MULTIPLE_BSSID_IES_MAX) + return -EINVAL; + if (nla_type(nl_ie) != bcn->multiple_bssid.cnt + 1) + return -EINVAL; + bcn->multiple_bssid.ies[bcn->multiple_bssid.cnt] = nla_data(nl_ie); + bcn->multiple_bssid.len[bcn->multiple_bssid.cnt] = nla_len(nl_ie); + bcn->multiple_bssid.cnt++; + } + } + return 0; } @@ -5321,6 +5341,20 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) return err; } + if (info->attrs[NL80211_ATTR_MULTIPLE_BSSID_PARENT]) + params.multiple_bssid.parent = + nla_get_u32(info->attrs[NL80211_ATTR_MULTIPLE_BSSID_PARENT]); + + if (info->attrs[NL80211_ATTR_MULTIPLE_BSSID_INDEX]) + params.multiple_bssid.index = nla_get_u8( + info->attrs[NL80211_ATTR_MULTIPLE_BSSID_INDEX]); + + if (info->attrs[NL80211_ATTR_MULTIPLE_BSSID_COUNT]) + params.multiple_bssid.count = nla_get_u8( + info->attrs[NL80211_ATTR_MULTIPLE_BSSID_COUNT]); + params.multiple_bssid.ema = + nla_get_flag(info->attrs[NL80211_ATTR_MULTIPLE_BSSID_EMA]); + nl80211_calculate_ap_params(¶ms); if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])