From patchwork Tue Nov 24 18:07:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Winkler X-Patchwork-Id: 1405708 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=bRjdXk+Y; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CgX86633tz9sVC for ; Wed, 25 Nov 2020 05:08:38 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404282AbgKXSIE (ORCPT ); Tue, 24 Nov 2020 13:08:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404271AbgKXSIC (ORCPT ); Tue, 24 Nov 2020 13:08:02 -0500 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2063C061A4D for ; Tue, 24 Nov 2020 10:08:01 -0800 (PST) Received: by mail-qt1-x84a.google.com with SMTP id y5so16843782qtb.13 for ; Tue, 24 Nov 2020 10:08:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=jr6n+gGQ0gPUfD8Udg6Byq8ZbVVPkJmpa2QPyf3HxP0=; b=bRjdXk+YNRs6MGMHpIX7PpUx3mpM9cFJM/71xN+gyLK2BLi19VstuHwyktRYwQoaCS Veb2hjhaqQLqSh6rmORx+hGHxW9/EdaRy+yQ9o42B7NjlGknybT/Og3dvR2PWcTF/Pvd n32vpF3CAPSFFJ84aBNlG+vZvjkVt0y8DULM8AnzYd5sZ/N9K6RiJOBNQdJKi3JrEf8Y KzWIY+rgW5ddA3oMIT78HCvdNlcfT8Q8iNQka59QjBXcs+VMP5DB21kmYnxbhSdGHeyt hKcrx9qIoz8mB8HamXwima6aOi7SweqXE+ia2dMIpj+eV735ZUYhyKFxQ21vPvflyqv9 xYsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=jr6n+gGQ0gPUfD8Udg6Byq8ZbVVPkJmpa2QPyf3HxP0=; b=Il4L4H0OUPZnAytca4HscB6y7FbuGcfRHPC4mBpQD2fiEeJAyUAjMBpkc0aumF2jUj nVFA5+lO8flZRjthSIHI+47lm4fwAl8bQD/x/p+WfakjbWSspNV7Db95veEmkOiCIFyl c5ZCzbqwyOMXAfolKtcHVysPcfEo7Hih2cd791PodXBTKXBOUDGiTXz+rQ22YEESe2Ns zG/i7kxP1t73JgyySjYtEFAxtEZGNBXrbMDZMme+E7cj3yQPkHafYPCJcmaQYQNHL07P 4PG75AO2JK6nDrJoWoRzfRjwc3MIIk2KalHNi30hiXRBvYF7MWcgqvAxqBC6DnTJtwVR djXw== X-Gm-Message-State: AOAM532pStS2QPNsaFRA6miSgiIUieKU+dlA+NPeYYMASD1cvK/olod0 iwtcX3I+4ppIGHGIUwKZr8Ot649LJaLPAuqe1FWY X-Google-Smtp-Source: ABdhPJxU22Xs03oChrUB09+FOvQjo/u+MSGq91eBAAfhOgxcxBhGj5ZQrIVYFaaXRoIWJGq9iyH5G29iSj4a6BNuQOj1 Sender: "danielwinkler via sendgmr" X-Received: from danielwinkler-linux.mtv.corp.google.com ([2620:15c:202:201:f693:9fff:fef4:4e59]) (user=danielwinkler job=sendgmr) by 2002:a0c:ba20:: with SMTP id w32mr6092787qvf.50.1606241281016; Tue, 24 Nov 2020 10:08:01 -0800 (PST) Date: Tue, 24 Nov 2020 10:07:46 -0800 In-Reply-To: <20201124180746.1773091-1-danielwinkler@google.com> Message-Id: <20201124100610.v5.5.I5068c01cae3cea674a96e103a0cf4d8c81425a4f@changeid> Mime-Version: 1.0 References: <20201124180746.1773091-1-danielwinkler@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v5 5/5] Bluetooth: Change MGMT security info CMD to be more generic From: Daniel Winkler To: marcel@holtmann.org Cc: chromeos-bluetooth-upstreaming@chromium.org, linux-bluetooth@vger.kernel.org, Daniel Winkler , Sonny Sasaka , "David S. Miller" , Jakub Kicinski , Johan Hedberg , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org For advertising, we wish to know the LE tx power capabilities of the controller in userspace, so this patch edits the Security Info MGMT command to be more generic, such that other various controller capabilities can be included in the EIR data. This change also includes the LE min and max tx power into this newly-named command. The change was tested by manually verifying that the MGMT command returns the tx power range as expected in userspace. Reviewed-by: Sonny Sasaka Signed-off-by: Daniel Winkler --- Changes in v5: None Changes in v4: - Combine LE tx range into a single EIR field for MGMT capabilities cmd Changes in v3: - Re-using security info MGMT command to carry controller capabilities Changes in v2: - Fixed sparse error in Capabilities MGMT command include/net/bluetooth/mgmt.h | 15 +++++++++----- net/bluetooth/mgmt.c | 39 +++++++++++++++++++++++------------- 2 files changed, 35 insertions(+), 19 deletions(-) diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h index 2e18e4173e2fa5..f9a6638e20b3c6 100644 --- a/include/net/bluetooth/mgmt.h +++ b/include/net/bluetooth/mgmt.h @@ -686,11 +686,16 @@ struct mgmt_cp_set_blocked_keys { #define MGMT_OP_SET_WIDEBAND_SPEECH 0x0047 -#define MGMT_OP_READ_SECURITY_INFO 0x0048 -#define MGMT_READ_SECURITY_INFO_SIZE 0 -struct mgmt_rp_read_security_info { - __le16 sec_len; - __u8 sec[]; +#define MGMT_CAP_SEC_FLAGS 0x01 +#define MGMT_CAP_MAX_ENC_KEY_SIZE 0x02 +#define MGMT_CAP_SMP_MAX_ENC_KEY_SIZE 0x03 +#define MGMT_CAP_LE_TX_PWR 0x04 + +#define MGMT_OP_READ_CONTROLLER_CAP 0x0048 +#define MGMT_READ_CONTROLLER_CAP_SIZE 0 +struct mgmt_rp_read_controller_cap { + __le16 cap_len; + __u8 cap[0]; } __packed; #define MGMT_OP_READ_EXP_FEATURES_INFO 0x0049 diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 668a62c8181eb1..d8adf78a437e0b 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -110,7 +110,7 @@ static const u16 mgmt_commands[] = { MGMT_OP_SET_APPEARANCE, MGMT_OP_SET_BLOCKED_KEYS, MGMT_OP_SET_WIDEBAND_SPEECH, - MGMT_OP_READ_SECURITY_INFO, + MGMT_OP_READ_CONTROLLER_CAP, MGMT_OP_READ_EXP_FEATURES_INFO, MGMT_OP_SET_EXP_FEATURE, MGMT_OP_READ_DEF_SYSTEM_CONFIG, @@ -176,7 +176,7 @@ static const u16 mgmt_untrusted_commands[] = { MGMT_OP_READ_CONFIG_INFO, MGMT_OP_READ_EXT_INDEX_LIST, MGMT_OP_READ_EXT_INFO, - MGMT_OP_READ_SECURITY_INFO, + MGMT_OP_READ_CONTROLLER_CAP, MGMT_OP_READ_EXP_FEATURES_INFO, MGMT_OP_READ_DEF_SYSTEM_CONFIG, MGMT_OP_READ_DEF_RUNTIME_CONFIG, @@ -3710,13 +3710,14 @@ static int set_wideband_speech(struct sock *sk, struct hci_dev *hdev, return err; } -static int read_security_info(struct sock *sk, struct hci_dev *hdev, - void *data, u16 data_len) +static int read_controller_cap(struct sock *sk, struct hci_dev *hdev, + void *data, u16 data_len) { - char buf[16]; - struct mgmt_rp_read_security_info *rp = (void *)buf; - u16 sec_len = 0; + char buf[20]; + struct mgmt_rp_read_controller_cap *rp = (void *)buf; + u16 cap_len = 0; u8 flags = 0; + u8 tx_power_range[2]; bt_dev_dbg(hdev, "sock %p", sk); @@ -3740,23 +3741,33 @@ static int read_security_info(struct sock *sk, struct hci_dev *hdev, flags |= 0x08; /* Encryption key size enforcement (LE) */ - sec_len = eir_append_data(rp->sec, sec_len, 0x01, &flags, 1); + cap_len = eir_append_data(rp->cap, cap_len, MGMT_CAP_SEC_FLAGS, + &flags, 1); /* When the Read Simple Pairing Options command is supported, then * also max encryption key size information is provided. */ if (hdev->commands[41] & 0x08) - sec_len = eir_append_le16(rp->sec, sec_len, 0x02, + cap_len = eir_append_le16(rp->cap, cap_len, + MGMT_CAP_MAX_ENC_KEY_SIZE, hdev->max_enc_key_size); - sec_len = eir_append_le16(rp->sec, sec_len, 0x03, SMP_MAX_ENC_KEY_SIZE); + cap_len = eir_append_le16(rp->cap, cap_len, + MGMT_CAP_SMP_MAX_ENC_KEY_SIZE, + SMP_MAX_ENC_KEY_SIZE); + + /* Append the min/max LE tx power parameters */ + memcpy(&tx_power_range[0], &hdev->min_le_tx_power, 1); + memcpy(&tx_power_range[1], &hdev->max_le_tx_power, 1); + cap_len = eir_append_data(rp->cap, cap_len, MGMT_CAP_LE_TX_PWR, + tx_power_range, 2); - rp->sec_len = cpu_to_le16(sec_len); + rp->cap_len = cpu_to_le16(cap_len); hci_dev_unlock(hdev); - return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_SECURITY_INFO, 0, - rp, sizeof(*rp) + sec_len); + return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_CONTROLLER_CAP, 0, + rp, sizeof(*rp) + cap_len); } #ifdef CONFIG_BT_FEATURE_DEBUG @@ -8193,7 +8204,7 @@ static const struct hci_mgmt_handler mgmt_handlers[] = { { set_blocked_keys, MGMT_OP_SET_BLOCKED_KEYS_SIZE, HCI_MGMT_VAR_LEN }, { set_wideband_speech, MGMT_SETTING_SIZE }, - { read_security_info, MGMT_READ_SECURITY_INFO_SIZE, + { read_controller_cap, MGMT_READ_CONTROLLER_CAP_SIZE, HCI_MGMT_UNTRUSTED }, { read_exp_features_info, MGMT_READ_EXP_FEATURES_INFO_SIZE, HCI_MGMT_UNTRUSTED |