From patchwork Thu Jun 4 07:09:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Crispin X-Patchwork-Id: 11587003 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 85D6F1392 for ; Thu, 4 Jun 2020 07:10:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 769082074B for ; Thu, 4 Jun 2020 07:10:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727882AbgFDHKD (ORCPT ); Thu, 4 Jun 2020 03:10:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726890AbgFDHKC (ORCPT ); Thu, 4 Jun 2020 03:10:02 -0400 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4EF2DC03E96E for ; Thu, 4 Jun 2020 00:10:02 -0700 (PDT) Received: from [46.59.202.224] (helo=localhost.localdomain) by ds12 with esmtpa (Exim 4.89) (envelope-from ) id 1jgk0l-0001P3-Fi; Thu, 04 Jun 2020 09:09:59 +0200 From: John Crispin To: Johannes Berg Cc: linux-wireless@vger.kernel.org, ath11k@lists.infradead.org, John Crispin Subject: [PATCH 05/12] mac80211: add multiple bssid IE parsing Date: Thu, 4 Jun 2020 09:09:45 +0200 Message-Id: <20200604070952.15481-6-john@phrozen.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604070952.15481-1-john@phrozen.org> References: <20200604070952.15481-1-john@phrozen.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Drivers might need to know the offset and length of the IE. Add parsing code and propagate the values to the driver using the mutable struct. Signed-off-by: John Crispin --- include/net/mac80211.h | 5 +++++ net/mac80211/ieee80211_i.h | 2 ++ net/mac80211/tx.c | 10 ++++++++++ net/mac80211/util.c | 4 ++++ 4 files changed, 21 insertions(+) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index bb2edace71a9..1a98b3907aa7 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -4717,12 +4717,17 @@ void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets * to CSA counters. This array can contain zero values which * should be ignored. + * @mbssid_offset: position of mbssid_offset + * @mbssid_length: position of mbssid_offset */ struct ieee80211_mutable_offsets { u16 tim_offset; u16 tim_length; u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; + + u16 multiple_bssid_offset; + u16 multiple_bssid_length; }; /** diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 2502726d0a58..abe488424287 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1520,6 +1520,7 @@ struct ieee802_11_elems { u8 dtim_count; u8 dtim_period; const struct ieee80211_addba_ext_ie *addba_ext_ie; + u16 multiple_bssid_offset; /* length of them, respectively */ u8 ext_capab_len; @@ -1540,6 +1541,7 @@ struct ieee802_11_elems { u8 perr_len; u8 country_elem_len; u8 bssid_index_len; + u8 multiple_bssid_len; /* whether a parse error occurred while retrieving these elements */ bool parse_error; diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 49d35936cc9d..5e2879cd24b0 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -4747,11 +4747,21 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw, is_template); if (offs) { + struct ieee802_11_elems elems; + offs->tim_offset = beacon->head_len; offs->tim_length = skb->len - beacon->head_len; /* for AP the csa offsets are from tail */ csa_off_base = skb->len; + + ieee802_11_parse_elems(skb->head, skb->len, true, &elems, + sdata->wdev.address, NULL); + if (!elems.parse_error) + goto out; + + offs->multiple_bssid_offset = elems.multiple_bssid_offset; + offs->multiple_bssid_length = elems.multiple_bssid_len; } if (beacon->tail) diff --git a/net/mac80211/util.c b/net/mac80211/util.c index a7c4d6a44e21..bbe2f1d9166c 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1311,6 +1311,10 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, &crc : NULL, elem, elems); break; + case WLAN_EID_MULTIPLE_BSSID: + elems->multiple_bssid_offset = pos - start; + elems->multiple_bssid_len = elen; + break; default: break; }