From patchwork Fri Oct 14 16:41:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Berg X-Patchwork-Id: 13007206 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEDE3C433FE for ; Fri, 14 Oct 2022 16:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230376AbiJNQmW (ORCPT ); Fri, 14 Oct 2022 12:42:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230332AbiJNQmV (ORCPT ); Fri, 14 Oct 2022 12:42:21 -0400 Received: from sipsolutions.net (s3.sipsolutions.net [IPv6:2a01:4f8:191:4433::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC3AF1BE1CF; Fri, 14 Oct 2022 09:42:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Content-Type:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-To: Resent-Cc:Resent-Message-ID; bh=KpXge4+rVoZIw8QW9HWNtJMdoQKNqLOLNcFesvoxsZU=; t=1665765740; x=1666975340; b=XSJJOlCmUzkoLBjmx/P42b7hBQpmRw2xmS8W+m5T8YZ6hEu I0NQYjn9BcapFqVD3j4RBKZiVgtdT5BKViV43w5282m8rB77pvacveHa5Yq5kX7KVtEgOlgGIC2OZ cBmmJbzgxKsNLUjM81riM9fvsEzytw9O7hNmqpbNZ29FsZgpfFtZzdVtw/RsfBKeCkZ4TwFfuFW0s NKe5SfLPLdPgc6MXgxJYxEWUKJiJYpXhK5QQY0a5wmJE9iw7n3Rt61Rr8Gn/0P4hMgGpXAbhvidoS PVUn8Ucg34jhHIcMlBMF9dDNu3zW18r6+hwm2nRyYG1fXb8FNtf3xQuvdetoCLWw==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1ojNlH-006gql-20; Fri, 14 Oct 2022 18:42:16 +0200 From: Johannes Berg To: linux-wireless@vger.kernel.org, stable@vger.kernel.org Cc: Felix Fietkau , Thadeu Lima de Souza Cascardo , Marcus Meissner , Jiri Kosina , Johannes Berg Subject: [RFC v5.10 1/3] mac80211: mlme: find auth challenge directly Date: Fri, 14 Oct 2022 18:41:48 +0200 Message-Id: <20221014164150.24310-2-johannes@sipsolutions.net> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221014164150.24310-1-johannes@sipsolutions.net> References: <20221014164150.24310-1-johannes@sipsolutions.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Johannes Berg There's no need to parse all elements etc. just to find the authentication challenge - use cfg80211_find_elem() instead. This also allows us to remove WLAN_EID_CHALLENGE handling from the element parsing entirely. Link: https://lore.kernel.org/r/20210920154009.45f9b3a15722.Ice3159ffad03a007d6154cbf1fb3a8c48489e86f@changeid Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 2 -- net/mac80211/mlme.c | 11 ++++++----- net/mac80211/util.c | 4 ---- 3 files changed, 6 insertions(+), 11 deletions(-) diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index bcc94cc1b620..e11f6d3fbd2b 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1485,7 +1485,6 @@ struct ieee802_11_elems { const u8 *supp_rates; const u8 *ds_params; const struct ieee80211_tim_ie *tim; - const u8 *challenge; const u8 *rsn; const u8 *rsnx; const u8 *erp_info; @@ -1538,7 +1537,6 @@ struct ieee802_11_elems { u8 ssid_len; u8 supp_rates_len; u8 tim_len; - u8 challenge_len; u8 rsn_len; u8 rsnx_len; u8 ext_supp_rates_len; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 3988403064ab..9e70cb86b420 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2899,14 +2899,14 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, { struct ieee80211_local *local = sdata->local; struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; + const struct element *challenge; u8 *pos; - struct ieee802_11_elems elems; u32 tx_flags = 0; pos = mgmt->u.auth.variable; - ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, - mgmt->bssid, auth_data->bss->bssid); - if (!elems.challenge) + challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, + len - (pos - (u8 *)mgmt)); + if (!challenge) return; auth_data->expected_transaction = 4; drv_mgd_prepare_tx(sdata->local, sdata, 0); @@ -2914,7 +2914,8 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | IEEE80211_TX_INTFL_MLME_CONN_TX; ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, - elems.challenge - 2, elems.challenge_len + 2, + (void *)challenge, + challenge->datalen + sizeof(*challenge), auth_data->bss->bssid, auth_data->bss->bssid, auth_data->key, auth_data->key_len, auth_data->key_idx, tx_flags); diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 11d5686893c6..e6b5d164a0ee 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1124,10 +1124,6 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, } else elem_parse_failed = true; break; - case WLAN_EID_CHALLENGE: - elems->challenge = pos; - elems->challenge_len = elen; - break; case WLAN_EID_VENDOR_SPECIFIC: if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && pos[2] == 0xf2) {