From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8881EC33C99 for ; Wed, 8 Jan 2020 00:34:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5FB6E206F0 for ; Wed, 8 Jan 2020 00:34:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HhJhZ6Jb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727135AbgAHAeE (ORCPT ); Tue, 7 Jan 2020 19:34:04 -0500 Received: from mail-pg1-f196.google.com ([209.85.215.196]:41322 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726281AbgAHAeD (ORCPT ); Tue, 7 Jan 2020 19:34:03 -0500 Received: by mail-pg1-f196.google.com with SMTP id x8so666766pgk.8 for ; Tue, 07 Jan 2020 16:34:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=mdvyyyvPpQFaJbQGLewzvFtpyc9kHqej1Sc18Z5t20Y=; b=HhJhZ6JbtVbTc9Z3tWPTrBC7dYlGj5VUuKuN1jDpB31phyLcrf212m6XwP9fs9iy6b gRh7cnjqBfx2/3a6fbNgWvj+FN5OEKRgpEgeUO+RkPLTuRc+ptrbuAj3lx3II4RRXhFc 7e8sUG5e/7wdcfSpHtIH4Ng2PYqbb2/ajPwGQoNBslks8jWBzZdvAjIzy6ipuiQkui62 THBw3AtTah9vMJm8sHN85L7f3EfKhaFQ9b8iDIeBc3IlxbrGgP3QChXCygKjMowNiviz UF/sVFLnR750BXNxIgfbzbDm02RMqb7u1e9Tk5UR4KE3sdmWPENavXKdmCsQZzbY+Tjh MW2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mdvyyyvPpQFaJbQGLewzvFtpyc9kHqej1Sc18Z5t20Y=; b=f0hQoawuQUHF3jcKWRQUT5j8XTempco80Nip58pOn12vjROl94dcCXn3Z+FUBV87VG 3+CbshifVWrm+47wguQ9ihVnD5CNicox9C7R6FiK2H31xZGWhxCOQP5yINyq+8bjr7S3 YG0PDMw1bFJThImKyJtiolX0GCS0Q7Ayeb6hiOducxDifH9EqkKKXVh8eR8JmCb+YOzx MgBBBesvTVozKbAD/dAArw2UtfEmlyqKUmhOPgsGxbuHUTlaBOtGUm4o9DkNaOCkdqii 84da4OAHarFfnuHRzncZdCp8nITKYQFAOJR8bPOhfLtbXtS39pSVdXvGQIXvcR53dC6+ fSvg== X-Gm-Message-State: APjAAAW1uUgqXzYoJplX7HGwJmjKc+Nq48z4oJcWQJPWpi67YsZf6drB 9c/gy0LwW5dn8LvGdxeFP8MPURB8qno= X-Google-Smtp-Source: APXvYqwJNi/eVNHx7riRPoOneDcoz6fCxAYsk/vcjVtJ3dB05F54H07u2edvo37QPp1Uomk0NbdsxA== X-Received: by 2002:a63:b141:: with SMTP id g1mr2543433pgp.168.1578443642630; Tue, 07 Jan 2020 16:34:02 -0800 (PST) Received: from localhost.localdomain ([192.102.209.43]) by smtp.gmail.com with ESMTPSA id u10sm925805pgg.41.2020.01.07.16.34.01 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jan 2020 16:34:01 -0800 (PST) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH BlueZ 18/22] shared/gatt-client: Add support for Read Multiple Variable Length Date: Tue, 7 Jan 2020 16:33:38 -0800 Message-Id: <20200108003342.15458-19-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200108003342.15458-1-luiz.dentz@gmail.com> References: <20200108003342.15458-1-luiz.dentz@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz The Read Multiple Variable Length Request is used to request that the server read two or more values of a set of attributes that have a variable or unknown value length and return their values in a Read Multiple Variable Length Response. --- src/shared/gatt-client.c | 37 +++++++++++++++++++++++++++++++++---- 1 file changed, 33 insertions(+), 4 deletions(-) diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c index d4758c2de..aecf0ca5a 100644 --- a/src/shared/gatt-client.c +++ b/src/shared/gatt-client.c @@ -2639,7 +2639,9 @@ static void read_multiple_cb(uint8_t opcode, const void *pdu, uint16_t length, uint8_t att_ecode; bool success; - if (opcode != BT_ATT_OP_READ_MULT_RSP || (!pdu && length)) { + if ((opcode != BT_ATT_OP_READ_MULT_RSP && + opcode != BT_ATT_OP_READ_MULT_VL_RSP) || + (!pdu && length)) { success = false; if (opcode == BT_ATT_OP_ERROR_RSP) @@ -2654,8 +2656,31 @@ static void read_multiple_cb(uint8_t opcode, const void *pdu, uint16_t length, att_ecode = 0; } - if (op->callback) + if (!op->callback) + return; + + if (opcode == BT_ATT_OP_READ_MULT_RSP) { op->callback(success, att_ecode, pdu, length, op->user_data); + return; + } + + /* Parse response */ + while (length >= 2) { + uint16_t len; + + len = get_le16(pdu); + length -= 2; + pdu += 2; + + /* The Length Value Tuple List may be truncated within the + * first two octets of a tuple due to the size limits of the + * current ATT_MTU. + */ + if (len > length) + length = len; + + op->callback(success, att_ecode, pdu, len, op->user_data); + } } unsigned int bt_gatt_client_read_multiple(struct bt_gatt_client *client, @@ -2667,6 +2692,7 @@ unsigned int bt_gatt_client_read_multiple(struct bt_gatt_client *client, uint8_t pdu[num_handles * 2]; struct request *req; struct read_op *op; + uint8_t opcode; int i; if (!client) @@ -2696,8 +2722,11 @@ unsigned int bt_gatt_client_read_multiple(struct bt_gatt_client *client, for (i = 0; i < num_handles; i++) put_le16(handles[i], pdu + (2 * i)); - req->att_id = bt_att_send(client->att, BT_ATT_OP_READ_MULT_REQ, - pdu, sizeof(pdu), + opcode = bt_gatt_client_get_features(client) & + BT_GATT_CHRC_CLI_FEAT_EATT ? BT_ATT_OP_READ_MULT_VL_REQ : + BT_GATT_CHRC_CLI_FEAT_EATT; + + req->att_id = bt_att_send(client->att, opcode, pdu, sizeof(pdu), read_multiple_cb, req, request_unref); if (!req->att_id) { -- 2.21.0