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1199 lines
39 KiB
1199 lines
39 KiB
/******************************************************************************
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*
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* Copyright 1999-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* This file contains SDP utility functions
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*
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******************************************************************************/
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#include <base/logging.h>
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#include <log/log.h>
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#include <stdio.h>
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#include <string.h>
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#include <utility>
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#include <vector>
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#include "bt_common.h"
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#include "bt_types.h"
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#include "btif_config.h"
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#include "avrc_defs.h"
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#include "sdp_api.h"
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#include "sdpint.h"
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#include "stack/include/stack_metrics_logging.h"
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using bluetooth::Uuid;
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static const uint8_t sdp_base_uuid[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x10, 0x00, 0x80, 0x00, 0x00, 0x80,
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0x5F, 0x9B, 0x34, 0xFB};
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template <typename T>
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static std::array<char, sizeof(T)> to_little_endian_array(T x) {
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static_assert(std::is_integral<T>::value,
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"to_little_endian_array parameter must be integral.");
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std::array<char, sizeof(T)> array = {};
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for (size_t i = 0; i < array.size(); i++) {
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array[i] = static_cast<char>((x >> (8 * i)) & 0xFF);
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}
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return array;
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}
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/**
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* Find the list of profile versions from Bluetooth Profile Descriptor list
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* attribute in a SDP record
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*
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* @param p_rec SDP record to search
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* @return a vector of <UUID, VERSION> pairs, empty if not found
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*/
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static std::vector<std::pair<uint16_t, uint16_t>> sdpu_find_profile_version(
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tSDP_DISC_REC* p_rec) {
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std::vector<std::pair<uint16_t, uint16_t>> result;
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for (tSDP_DISC_ATTR* p_attr = p_rec->p_first_attr; p_attr != nullptr;
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p_attr = p_attr->p_next_attr) {
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// Find the profile descriptor list */
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if (p_attr->attr_id != ATTR_ID_BT_PROFILE_DESC_LIST ||
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SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) != DATA_ELE_SEQ_DESC_TYPE) {
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continue;
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}
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// Walk through the protocol descriptor list
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for (tSDP_DISC_ATTR* p_sattr = p_attr->attr_value.v.p_sub_attr;
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p_sattr != nullptr; p_sattr = p_sattr->p_next_attr) {
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// Safety check - each entry should itself be a sequence
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if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) !=
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DATA_ELE_SEQ_DESC_TYPE) {
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LOG(WARNING) << __func__ << ": Descriptor type is not sequence: "
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<< loghex(SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type));
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return std::vector<std::pair<uint16_t, uint16_t>>();
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}
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// Now, see if the entry contains the profile UUID we are interested in
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for (tSDP_DISC_ATTR* p_ssattr = p_sattr->attr_value.v.p_sub_attr;
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p_ssattr != nullptr; p_ssattr = p_ssattr->p_next_attr) {
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if (SDP_DISC_ATTR_TYPE(p_ssattr->attr_len_type) != UUID_DESC_TYPE ||
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SDP_DISC_ATTR_LEN(p_ssattr->attr_len_type) != 2) {
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continue;
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}
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uint16_t uuid = p_ssattr->attr_value.v.u16;
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// Next attribute should be the version attribute
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tSDP_DISC_ATTR* version_attr = p_ssattr->p_next_attr;
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if (SDP_DISC_ATTR_TYPE(version_attr->attr_len_type) != UINT_DESC_TYPE ||
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SDP_DISC_ATTR_LEN(version_attr->attr_len_type) != 2) {
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LOG(WARNING) << __func__ << ": Bad version type "
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<< loghex(
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SDP_DISC_ATTR_TYPE(version_attr->attr_len_type))
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<< ", or length "
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<< SDP_DISC_ATTR_LEN(version_attr->attr_len_type);
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return std::vector<std::pair<uint16_t, uint16_t>>();
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}
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// High order 8 bits is the major number, low order is the
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// minor number (big endian)
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uint16_t version = version_attr->attr_value.v.u16;
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result.emplace_back(uuid, version);
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}
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}
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}
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return result;
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}
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/**
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* Find the most specific 16-bit service uuid represented by a SDP record
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*
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* @param p_rec pointer to a SDP record
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* @return most specific 16-bit service uuid, 0 if not found
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*/
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static uint16_t sdpu_find_most_specific_service_uuid(tSDP_DISC_REC* p_rec) {
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for (tSDP_DISC_ATTR* p_attr = p_rec->p_first_attr; p_attr != nullptr;
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p_attr = p_attr->p_next_attr) {
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if (p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST &&
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SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE) {
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tSDP_DISC_ATTR* p_first_attr = p_attr->attr_value.v.p_sub_attr;
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if (p_first_attr == nullptr) {
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android_errorWriteLog(0x534e4554, "227203684");
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return 0;
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}
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if (SDP_DISC_ATTR_TYPE(p_first_attr->attr_len_type) == UUID_DESC_TYPE &&
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SDP_DISC_ATTR_LEN(p_first_attr->attr_len_type) == 2) {
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return p_first_attr->attr_value.v.u16;
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} else if (SDP_DISC_ATTR_TYPE(p_first_attr->attr_len_type) ==
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DATA_ELE_SEQ_DESC_TYPE) {
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// Workaround for Toyota G Block car kit:
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// It incorrectly puts an extra data element sequence in this attribute
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for (tSDP_DISC_ATTR* p_extra_sattr =
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p_first_attr->attr_value.v.p_sub_attr;
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p_extra_sattr != nullptr;
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p_extra_sattr = p_extra_sattr->p_next_attr) {
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// Return the first UUID data element
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if (SDP_DISC_ATTR_TYPE(p_extra_sattr->attr_len_type) ==
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UUID_DESC_TYPE &&
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SDP_DISC_ATTR_LEN(p_extra_sattr->attr_len_type) == 2) {
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return p_extra_sattr->attr_value.v.u16;
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}
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}
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} else {
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LOG(WARNING) << __func__ << ": Bad Service Class ID list attribute";
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return 0;
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}
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} else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) {
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if (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE &&
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SDP_DISC_ATTR_LEN(p_attr->attr_len_type) == 2) {
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return p_attr->attr_value.v.u16;
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}
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}
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}
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return 0;
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}
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void sdpu_log_attribute_metrics(const RawAddress& bda,
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tSDP_DISCOVERY_DB* p_db) {
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CHECK_NE(p_db, nullptr);
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bool has_di_record = false;
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for (tSDP_DISC_REC* p_rec = p_db->p_first_rec; p_rec != nullptr;
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p_rec = p_rec->p_next_rec) {
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uint16_t service_uuid = sdpu_find_most_specific_service_uuid(p_rec);
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if (service_uuid == 0) {
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LOG(INFO) << __func__ << ": skipping record without service uuid " << bda;
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continue;
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}
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// Log the existence of a profile role
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// This can be different from Bluetooth Profile Descriptor List
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log_sdp_attribute(bda, service_uuid, 0, 0, nullptr);
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// Log profile version from Bluetooth Profile Descriptor List
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auto uuid_version_array = sdpu_find_profile_version(p_rec);
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for (const auto& uuid_version_pair : uuid_version_array) {
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uint16_t profile_uuid = uuid_version_pair.first;
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uint16_t version = uuid_version_pair.second;
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auto version_array = to_little_endian_array(version);
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log_sdp_attribute(bda, profile_uuid, ATTR_ID_BT_PROFILE_DESC_LIST,
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version_array.size(), version_array.data());
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}
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// Log protocol version from Protocol Descriptor List
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uint16_t protocol_uuid = 0;
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switch (service_uuid) {
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case UUID_SERVCLASS_AUDIO_SOURCE:
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case UUID_SERVCLASS_AUDIO_SINK:
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protocol_uuid = UUID_PROTOCOL_AVDTP;
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break;
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case UUID_SERVCLASS_AV_REMOTE_CONTROL:
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case UUID_SERVCLASS_AV_REM_CTRL_CONTROL:
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case UUID_SERVCLASS_AV_REM_CTRL_TARGET:
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protocol_uuid = UUID_PROTOCOL_AVCTP;
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break;
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case UUID_SERVCLASS_PANU:
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case UUID_SERVCLASS_GN:
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protocol_uuid = UUID_PROTOCOL_BNEP;
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break;
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}
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if (protocol_uuid != 0) {
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tSDP_PROTOCOL_ELEM protocol_elements = {};
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if (SDP_FindProtocolListElemInRec(p_rec, protocol_uuid,
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&protocol_elements)) {
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if (protocol_elements.num_params >= 1) {
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uint16_t version = protocol_elements.params[0];
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auto version_array = to_little_endian_array(version);
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log_sdp_attribute(bda, protocol_uuid, ATTR_ID_PROTOCOL_DESC_LIST,
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version_array.size(), version_array.data());
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}
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}
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}
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// Log profile supported features from various supported feature attributes
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switch (service_uuid) {
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case UUID_SERVCLASS_AG_HANDSFREE:
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case UUID_SERVCLASS_HF_HANDSFREE:
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case UUID_SERVCLASS_AV_REMOTE_CONTROL:
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case UUID_SERVCLASS_AV_REM_CTRL_CONTROL:
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case UUID_SERVCLASS_AV_REM_CTRL_TARGET:
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case UUID_SERVCLASS_AUDIO_SOURCE:
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case UUID_SERVCLASS_AUDIO_SINK: {
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tSDP_DISC_ATTR* p_attr =
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SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES);
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if (p_attr == nullptr) {
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break;
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}
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uint16_t supported_features = p_attr->attr_value.v.u16;
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auto version_array = to_little_endian_array(supported_features);
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log_sdp_attribute(bda, service_uuid, ATTR_ID_SUPPORTED_FEATURES,
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version_array.size(), version_array.data());
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break;
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}
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case UUID_SERVCLASS_MESSAGE_NOTIFICATION:
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case UUID_SERVCLASS_MESSAGE_ACCESS: {
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tSDP_DISC_ATTR* p_attr =
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SDP_FindAttributeInRec(p_rec, ATTR_ID_MAP_SUPPORTED_FEATURES);
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if (p_attr == nullptr) {
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break;
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}
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uint32_t map_supported_features = p_attr->attr_value.v.u32;
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auto features_array = to_little_endian_array(map_supported_features);
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log_sdp_attribute(bda, service_uuid, ATTR_ID_MAP_SUPPORTED_FEATURES,
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features_array.size(), features_array.data());
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break;
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}
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case UUID_SERVCLASS_PBAP_PCE:
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case UUID_SERVCLASS_PBAP_PSE: {
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tSDP_DISC_ATTR* p_attr =
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SDP_FindAttributeInRec(p_rec, ATTR_ID_PBAP_SUPPORTED_FEATURES);
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if (p_attr == nullptr) {
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break;
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}
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uint32_t pbap_supported_features = p_attr->attr_value.v.u32;
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auto features_array = to_little_endian_array(pbap_supported_features);
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log_sdp_attribute(bda, service_uuid, ATTR_ID_PBAP_SUPPORTED_FEATURES,
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features_array.size(), features_array.data());
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break;
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}
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}
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if (service_uuid == UUID_SERVCLASS_PNP_INFORMATION) {
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has_di_record = true;
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}
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}
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// Log the first DI record if there is one
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if (has_di_record) {
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tSDP_DI_GET_RECORD di_record = {};
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if (SDP_GetDiRecord(1, &di_record, p_db) == SDP_SUCCESS) {
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auto version_array = to_little_endian_array(di_record.spec_id);
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log_sdp_attribute(bda, UUID_SERVCLASS_PNP_INFORMATION,
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ATTR_ID_SPECIFICATION_ID, version_array.size(),
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version_array.data());
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std::stringstream ss;
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// [N - native]::SDP::[DIP - Device ID Profile]
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ss << "N:SDP::DIP::" << loghex(di_record.rec.vendor_id_source);
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log_manufacturer_info(
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bda, android::bluetooth::DeviceInfoSrcEnum::DEVICE_INFO_INTERNAL,
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ss.str(), loghex(di_record.rec.vendor), loghex(di_record.rec.product),
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loghex(di_record.rec.version), "");
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std::string bda_string = bda.ToString();
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// write manufacturer, model, HW version to config
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btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_MANUFACTURER,
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di_record.rec.vendor);
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btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_MODEL,
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di_record.rec.product);
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btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_HW_VERSION,
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di_record.rec.version);
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btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_VENDOR_ID_SRC,
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di_record.rec.vendor_id_source);
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}
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}
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}
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/*******************************************************************************
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*
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* Function sdpu_find_ccb_by_cid
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*
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* Description This function searches the CCB table for an entry with the
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* passed CID.
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*
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* Returns the CCB address, or NULL if not found.
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*
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******************************************************************************/
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tCONN_CB* sdpu_find_ccb_by_cid(uint16_t cid) {
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uint16_t xx;
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tCONN_CB* p_ccb;
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/* Look through each connection control block */
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for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++) {
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if ((p_ccb->con_state != SDP_STATE_IDLE) && (p_ccb->connection_id == cid))
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return (p_ccb);
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}
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/* If here, not found */
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return (NULL);
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}
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/*******************************************************************************
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*
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* Function sdpu_find_ccb_by_db
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*
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* Description This function searches the CCB table for an entry with the
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* passed discovery db.
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*
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* Returns the CCB address, or NULL if not found.
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*
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******************************************************************************/
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tCONN_CB* sdpu_find_ccb_by_db(tSDP_DISCOVERY_DB* p_db) {
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uint16_t xx;
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tCONN_CB* p_ccb;
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if (p_db) {
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/* Look through each connection control block */
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for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++) {
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if ((p_ccb->con_state != SDP_STATE_IDLE) && (p_ccb->p_db == p_db))
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return (p_ccb);
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}
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}
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/* If here, not found */
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return (NULL);
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}
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|
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/*******************************************************************************
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*
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* Function sdpu_allocate_ccb
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*
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* Description This function allocates a new CCB.
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*
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* Returns CCB address, or NULL if none available.
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*
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******************************************************************************/
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tCONN_CB* sdpu_allocate_ccb(void) {
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uint16_t xx;
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tCONN_CB* p_ccb;
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/* Look through each connection control block for a free one */
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for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++) {
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if (p_ccb->con_state == SDP_STATE_IDLE) {
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alarm_t* alarm = p_ccb->sdp_conn_timer;
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memset(p_ccb, 0, sizeof(tCONN_CB));
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p_ccb->sdp_conn_timer = alarm;
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return (p_ccb);
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}
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}
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/* If here, no free CCB found */
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return (NULL);
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}
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|
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/*******************************************************************************
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*
|
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* Function sdpu_release_ccb
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*
|
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* Description This function releases a CCB.
|
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*
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* Returns void
|
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*
|
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******************************************************************************/
|
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void sdpu_release_ccb(tCONN_CB* p_ccb) {
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/* Ensure timer is stopped */
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alarm_cancel(p_ccb->sdp_conn_timer);
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|
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/* Drop any response pointer we may be holding */
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p_ccb->con_state = SDP_STATE_IDLE;
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p_ccb->is_attr_search = false;
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|
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/* Free the response buffer */
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if (p_ccb->rsp_list) SDP_TRACE_DEBUG("releasing SDP rsp_list");
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osi_free_and_reset((void**)&p_ccb->rsp_list);
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}
|
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|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_build_attrib_seq
|
|
*
|
|
* Description This function builds an attribute sequence from the list of
|
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* passed attributes. It is also passed the address of the
|
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* output buffer.
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*
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* Returns Pointer to next byte in the output buffer.
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*
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******************************************************************************/
|
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uint8_t* sdpu_build_attrib_seq(uint8_t* p_out, uint16_t* p_attr,
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uint16_t num_attrs) {
|
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uint16_t xx;
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|
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/* First thing is the data element header. See if the length fits 1 byte */
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/* If no attributes, assume a 4-byte wildcard */
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if (!p_attr)
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xx = 5;
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else
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xx = num_attrs * 3;
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if (xx > 255) {
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UINT8_TO_BE_STREAM(p_out,
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(DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_WORD);
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UINT16_TO_BE_STREAM(p_out, xx);
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} else {
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UINT8_TO_BE_STREAM(p_out,
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(DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_BYTE);
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UINT8_TO_BE_STREAM(p_out, xx);
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}
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|
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/* If there are no attributes specified, assume caller wants wildcard */
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if (!p_attr) {
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UINT8_TO_BE_STREAM(p_out, (UINT_DESC_TYPE << 3) | SIZE_FOUR_BYTES);
|
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UINT16_TO_BE_STREAM(p_out, 0);
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UINT16_TO_BE_STREAM(p_out, 0xFFFF);
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} else {
|
|
/* Loop through and put in all the attributes(s) */
|
|
for (xx = 0; xx < num_attrs; xx++, p_attr++) {
|
|
UINT8_TO_BE_STREAM(p_out, (UINT_DESC_TYPE << 3) | SIZE_TWO_BYTES);
|
|
UINT16_TO_BE_STREAM(p_out, *p_attr);
|
|
}
|
|
}
|
|
|
|
return (p_out);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_build_attrib_entry
|
|
*
|
|
* Description This function builds an attribute entry from the passed
|
|
* attribute record. It is also passed the address of the
|
|
* output buffer.
|
|
*
|
|
* Returns Pointer to next byte in the output buffer.
|
|
*
|
|
******************************************************************************/
|
|
uint8_t* sdpu_build_attrib_entry(uint8_t* p_out, tSDP_ATTRIBUTE* p_attr) {
|
|
/* First, store the attribute ID. Goes as a UINT */
|
|
UINT8_TO_BE_STREAM(p_out, (UINT_DESC_TYPE << 3) | SIZE_TWO_BYTES);
|
|
UINT16_TO_BE_STREAM(p_out, p_attr->id);
|
|
|
|
/* the attribute is in the db record.
|
|
* assuming the attribute len is less than SDP_MAX_ATTR_LEN */
|
|
switch (p_attr->type) {
|
|
case TEXT_STR_DESC_TYPE: /* 4 */
|
|
case DATA_ELE_SEQ_DESC_TYPE: /* 6 */
|
|
case DATA_ELE_ALT_DESC_TYPE: /* 7 */
|
|
case URL_DESC_TYPE: /* 8 */
|
|
#if (SDP_MAX_ATTR_LEN > 0xFFFF)
|
|
if (p_attr->len > 0xFFFF) {
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_IN_NEXT_LONG);
|
|
UINT32_TO_BE_STREAM(p_out, p_attr->len);
|
|
} else
|
|
#endif /* 0xFFFF - 0xFF */
|
|
#if (SDP_MAX_ATTR_LEN > 0xFF)
|
|
if (p_attr->len > 0xFF) {
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_IN_NEXT_WORD);
|
|
UINT16_TO_BE_STREAM(p_out, p_attr->len);
|
|
} else
|
|
#endif /* 0xFF and less*/
|
|
{
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_IN_NEXT_BYTE);
|
|
UINT8_TO_BE_STREAM(p_out, p_attr->len);
|
|
}
|
|
|
|
if (p_attr->value_ptr != NULL) {
|
|
ARRAY_TO_BE_STREAM(p_out, p_attr->value_ptr, (int)p_attr->len);
|
|
}
|
|
|
|
return (p_out);
|
|
}
|
|
|
|
/* Now, store the attribute value */
|
|
switch (p_attr->len) {
|
|
case 1:
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_ONE_BYTE);
|
|
break;
|
|
case 2:
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_TWO_BYTES);
|
|
break;
|
|
case 4:
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_FOUR_BYTES);
|
|
break;
|
|
case 8:
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_EIGHT_BYTES);
|
|
break;
|
|
case 16:
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_SIXTEEN_BYTES);
|
|
break;
|
|
default:
|
|
UINT8_TO_BE_STREAM(p_out, (p_attr->type << 3) | SIZE_IN_NEXT_BYTE);
|
|
UINT8_TO_BE_STREAM(p_out, p_attr->len);
|
|
break;
|
|
}
|
|
|
|
if (p_attr->value_ptr != NULL) {
|
|
ARRAY_TO_BE_STREAM(p_out, p_attr->value_ptr, (int)p_attr->len);
|
|
}
|
|
|
|
return (p_out);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_build_n_send_error
|
|
*
|
|
* Description This function builds and sends an error packet.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
void sdpu_build_n_send_error(tCONN_CB* p_ccb, uint16_t trans_num,
|
|
uint16_t error_code, char* p_error_text) {
|
|
uint8_t *p_rsp, *p_rsp_start, *p_rsp_param_len;
|
|
uint16_t rsp_param_len;
|
|
BT_HDR* p_buf = (BT_HDR*)osi_malloc(SDP_DATA_BUF_SIZE);
|
|
|
|
SDP_TRACE_WARNING("SDP - sdpu_build_n_send_error code: 0x%x CID: 0x%x",
|
|
error_code, p_ccb->connection_id);
|
|
|
|
/* Send the packet to L2CAP */
|
|
p_buf->offset = L2CAP_MIN_OFFSET;
|
|
p_rsp = p_rsp_start = (uint8_t*)(p_buf + 1) + L2CAP_MIN_OFFSET;
|
|
|
|
UINT8_TO_BE_STREAM(p_rsp, SDP_PDU_ERROR_RESPONSE);
|
|
UINT16_TO_BE_STREAM(p_rsp, trans_num);
|
|
|
|
/* Skip the parameter length, we need to add it at the end */
|
|
p_rsp_param_len = p_rsp;
|
|
p_rsp += 2;
|
|
|
|
UINT16_TO_BE_STREAM(p_rsp, error_code);
|
|
|
|
/* Unplugfest example traces do not have any error text */
|
|
if (p_error_text)
|
|
ARRAY_TO_BE_STREAM(p_rsp, p_error_text, (int)strlen(p_error_text));
|
|
|
|
/* Go back and put the parameter length into the buffer */
|
|
rsp_param_len = p_rsp - p_rsp_param_len - 2;
|
|
UINT16_TO_BE_STREAM(p_rsp_param_len, rsp_param_len);
|
|
|
|
/* Set the length of the SDP data in the buffer */
|
|
p_buf->len = p_rsp - p_rsp_start;
|
|
|
|
/* Send the buffer through L2CAP */
|
|
L2CA_DataWrite(p_ccb->connection_id, p_buf);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_extract_uid_seq
|
|
*
|
|
* Description This function extracts a UUID sequence from the passed input
|
|
* buffer, and puts it into the passed output list.
|
|
*
|
|
* Returns Pointer to next byte in the input buffer after the sequence.
|
|
*
|
|
******************************************************************************/
|
|
uint8_t* sdpu_extract_uid_seq(uint8_t* p, uint16_t param_len,
|
|
tSDP_UUID_SEQ* p_seq) {
|
|
uint8_t* p_seq_end;
|
|
uint8_t descr, type, size;
|
|
uint32_t seq_len, uuid_len;
|
|
|
|
/* Assume none found */
|
|
p_seq->num_uids = 0;
|
|
|
|
/* A UID sequence is composed of a bunch of UIDs. */
|
|
if (sizeof(descr) > param_len) return (NULL);
|
|
param_len -= sizeof(descr);
|
|
|
|
BE_STREAM_TO_UINT8(descr, p);
|
|
type = descr >> 3;
|
|
size = descr & 7;
|
|
|
|
if (type != DATA_ELE_SEQ_DESC_TYPE) return (NULL);
|
|
|
|
switch (size) {
|
|
case SIZE_TWO_BYTES:
|
|
seq_len = 2;
|
|
break;
|
|
case SIZE_FOUR_BYTES:
|
|
seq_len = 4;
|
|
break;
|
|
case SIZE_SIXTEEN_BYTES:
|
|
seq_len = 16;
|
|
break;
|
|
case SIZE_IN_NEXT_BYTE:
|
|
if (sizeof(uint8_t) > param_len) return (NULL);
|
|
param_len -= sizeof(uint8_t);
|
|
BE_STREAM_TO_UINT8(seq_len, p);
|
|
break;
|
|
case SIZE_IN_NEXT_WORD:
|
|
if (sizeof(uint16_t) > param_len) return (NULL);
|
|
param_len -= sizeof(uint16_t);
|
|
BE_STREAM_TO_UINT16(seq_len, p);
|
|
break;
|
|
case SIZE_IN_NEXT_LONG:
|
|
if (sizeof(uint32_t) > param_len) return (NULL);
|
|
param_len -= sizeof(uint32_t);
|
|
BE_STREAM_TO_UINT32(seq_len, p);
|
|
break;
|
|
default:
|
|
return (NULL);
|
|
}
|
|
|
|
if (seq_len > param_len) return (NULL);
|
|
|
|
p_seq_end = p + seq_len;
|
|
|
|
/* Loop through, extracting the UIDs */
|
|
for (; p < p_seq_end;) {
|
|
BE_STREAM_TO_UINT8(descr, p);
|
|
type = descr >> 3;
|
|
size = descr & 7;
|
|
|
|
if (type != UUID_DESC_TYPE) return (NULL);
|
|
|
|
switch (size) {
|
|
case SIZE_TWO_BYTES:
|
|
uuid_len = 2;
|
|
break;
|
|
case SIZE_FOUR_BYTES:
|
|
uuid_len = 4;
|
|
break;
|
|
case SIZE_SIXTEEN_BYTES:
|
|
uuid_len = 16;
|
|
break;
|
|
case SIZE_IN_NEXT_BYTE:
|
|
if (p + sizeof(uint8_t) > p_seq_end) return NULL;
|
|
BE_STREAM_TO_UINT8(uuid_len, p);
|
|
break;
|
|
case SIZE_IN_NEXT_WORD:
|
|
if (p + sizeof(uint16_t) > p_seq_end) return NULL;
|
|
BE_STREAM_TO_UINT16(uuid_len, p);
|
|
break;
|
|
case SIZE_IN_NEXT_LONG:
|
|
if (p + sizeof(uint32_t) > p_seq_end) return NULL;
|
|
BE_STREAM_TO_UINT32(uuid_len, p);
|
|
break;
|
|
default:
|
|
return (NULL);
|
|
}
|
|
|
|
/* If UUID length is valid, copy it across */
|
|
if (((uuid_len == 2) || (uuid_len == 4) || (uuid_len == 16)) &&
|
|
(p + uuid_len <= p_seq_end)) {
|
|
p_seq->uuid_entry[p_seq->num_uids].len = (uint16_t)uuid_len;
|
|
BE_STREAM_TO_ARRAY(p, p_seq->uuid_entry[p_seq->num_uids].value,
|
|
(int)uuid_len);
|
|
p_seq->num_uids++;
|
|
} else
|
|
return (NULL);
|
|
|
|
/* We can only do so many */
|
|
if (p_seq->num_uids >= MAX_UUIDS_PER_SEQ) return (NULL);
|
|
}
|
|
|
|
if (p != p_seq_end) return (NULL);
|
|
|
|
return (p);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_extract_attr_seq
|
|
*
|
|
* Description This function extracts an attribute sequence from the passed
|
|
* input buffer, and puts it into the passed output list.
|
|
*
|
|
* Returns Pointer to next byte in the input buffer after the sequence.
|
|
*
|
|
******************************************************************************/
|
|
uint8_t* sdpu_extract_attr_seq(uint8_t* p, uint16_t param_len,
|
|
tSDP_ATTR_SEQ* p_seq) {
|
|
uint8_t* p_end_list;
|
|
uint8_t descr, type, size;
|
|
uint32_t list_len, attr_len;
|
|
|
|
/* Assume none found */
|
|
p_seq->num_attr = 0;
|
|
|
|
/* Get attribute sequence info */
|
|
if (param_len < sizeof(descr)) return NULL;
|
|
param_len -= sizeof(descr);
|
|
BE_STREAM_TO_UINT8(descr, p);
|
|
type = descr >> 3;
|
|
size = descr & 7;
|
|
|
|
if (type != DATA_ELE_SEQ_DESC_TYPE) return NULL;
|
|
|
|
switch (size) {
|
|
case SIZE_IN_NEXT_BYTE:
|
|
if (param_len < sizeof(uint8_t)) return NULL;
|
|
param_len -= sizeof(uint8_t);
|
|
BE_STREAM_TO_UINT8(list_len, p);
|
|
break;
|
|
|
|
case SIZE_IN_NEXT_WORD:
|
|
if (param_len < sizeof(uint16_t)) return NULL;
|
|
param_len -= sizeof(uint16_t);
|
|
BE_STREAM_TO_UINT16(list_len, p);
|
|
break;
|
|
|
|
case SIZE_IN_NEXT_LONG:
|
|
if (param_len < sizeof(uint32_t)) return NULL;
|
|
param_len -= sizeof(uint32_t);
|
|
BE_STREAM_TO_UINT32(list_len, p);
|
|
break;
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
if (list_len > param_len) return NULL;
|
|
|
|
p_end_list = p + list_len;
|
|
|
|
/* Loop through, extracting the attribute IDs */
|
|
for (; p < p_end_list;) {
|
|
BE_STREAM_TO_UINT8(descr, p);
|
|
type = descr >> 3;
|
|
size = descr & 7;
|
|
|
|
if (type != UINT_DESC_TYPE) return NULL;
|
|
|
|
switch (size) {
|
|
case SIZE_TWO_BYTES:
|
|
attr_len = 2;
|
|
break;
|
|
case SIZE_FOUR_BYTES:
|
|
attr_len = 4;
|
|
break;
|
|
case SIZE_IN_NEXT_BYTE:
|
|
if (p + sizeof(uint8_t) > p_end_list) return NULL;
|
|
BE_STREAM_TO_UINT8(attr_len, p);
|
|
break;
|
|
case SIZE_IN_NEXT_WORD:
|
|
if (p + sizeof(uint16_t) > p_end_list) return NULL;
|
|
BE_STREAM_TO_UINT16(attr_len, p);
|
|
break;
|
|
case SIZE_IN_NEXT_LONG:
|
|
if (p + sizeof(uint32_t) > p_end_list) return NULL;
|
|
BE_STREAM_TO_UINT32(attr_len, p);
|
|
break;
|
|
default:
|
|
return NULL;
|
|
break;
|
|
}
|
|
|
|
/* Attribute length must be 2-bytes or 4-bytes for a paired entry. */
|
|
if (p + attr_len > p_end_list) return NULL;
|
|
if (attr_len == 2) {
|
|
BE_STREAM_TO_UINT16(p_seq->attr_entry[p_seq->num_attr].start, p);
|
|
p_seq->attr_entry[p_seq->num_attr].end =
|
|
p_seq->attr_entry[p_seq->num_attr].start;
|
|
} else if (attr_len == 4) {
|
|
BE_STREAM_TO_UINT16(p_seq->attr_entry[p_seq->num_attr].start, p);
|
|
BE_STREAM_TO_UINT16(p_seq->attr_entry[p_seq->num_attr].end, p);
|
|
} else
|
|
return (NULL);
|
|
|
|
/* We can only do so many */
|
|
if (++p_seq->num_attr >= MAX_ATTR_PER_SEQ) return (NULL);
|
|
}
|
|
|
|
return (p);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_get_len_from_type
|
|
*
|
|
* Description This function gets the length
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
uint8_t* sdpu_get_len_from_type(uint8_t* p, uint8_t* p_end, uint8_t type,
|
|
uint32_t* p_len) {
|
|
uint8_t u8;
|
|
uint16_t u16;
|
|
uint32_t u32;
|
|
|
|
switch (type & 7) {
|
|
case SIZE_ONE_BYTE:
|
|
*p_len = 1;
|
|
break;
|
|
case SIZE_TWO_BYTES:
|
|
*p_len = 2;
|
|
break;
|
|
case SIZE_FOUR_BYTES:
|
|
*p_len = 4;
|
|
break;
|
|
case SIZE_EIGHT_BYTES:
|
|
*p_len = 8;
|
|
break;
|
|
case SIZE_SIXTEEN_BYTES:
|
|
*p_len = 16;
|
|
break;
|
|
case SIZE_IN_NEXT_BYTE:
|
|
if (p + 1 > p_end) {
|
|
*p_len = 0;
|
|
return NULL;
|
|
}
|
|
BE_STREAM_TO_UINT8(u8, p);
|
|
*p_len = u8;
|
|
break;
|
|
case SIZE_IN_NEXT_WORD:
|
|
if (p + 2 > p_end) {
|
|
*p_len = 0;
|
|
return NULL;
|
|
}
|
|
BE_STREAM_TO_UINT16(u16, p);
|
|
*p_len = u16;
|
|
break;
|
|
case SIZE_IN_NEXT_LONG:
|
|
if (p + 4 > p_end) {
|
|
*p_len = 0;
|
|
return NULL;
|
|
}
|
|
BE_STREAM_TO_UINT32(u32, p);
|
|
*p_len = (uint16_t)u32;
|
|
break;
|
|
}
|
|
|
|
return (p);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_is_base_uuid
|
|
*
|
|
* Description This function checks a 128-bit UUID with the base to see if
|
|
* it matches. Only the last 12 bytes are compared.
|
|
*
|
|
* Returns true if matched, else false
|
|
*
|
|
******************************************************************************/
|
|
bool sdpu_is_base_uuid(uint8_t* p_uuid) {
|
|
uint16_t xx;
|
|
|
|
for (xx = 4; xx < Uuid::kNumBytes128; xx++)
|
|
if (p_uuid[xx] != sdp_base_uuid[xx]) return (false);
|
|
|
|
/* If here, matched */
|
|
return (true);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_compare_uuid_arrays
|
|
*
|
|
* Description This function compares 2 BE UUIDs. If needed, they are
|
|
* expanded to 128-bit UUIDs, then compared.
|
|
*
|
|
* NOTE it is assumed that the arrays are in Big Endian format
|
|
*
|
|
* Returns true if matched, else false
|
|
*
|
|
******************************************************************************/
|
|
bool sdpu_compare_uuid_arrays(uint8_t* p_uuid1, uint32_t len1, uint8_t* p_uuid2,
|
|
uint16_t len2) {
|
|
uint8_t nu1[Uuid::kNumBytes128];
|
|
uint8_t nu2[Uuid::kNumBytes128];
|
|
|
|
if (((len1 != 2) && (len1 != 4) && (len1 != 16)) ||
|
|
((len2 != 2) && (len2 != 4) && (len2 != 16))) {
|
|
SDP_TRACE_ERROR("%s: invalid length", __func__);
|
|
return false;
|
|
}
|
|
|
|
/* If lengths match, do a straight compare */
|
|
if (len1 == len2) {
|
|
if (len1 == 2)
|
|
return ((p_uuid1[0] == p_uuid2[0]) && (p_uuid1[1] == p_uuid2[1]));
|
|
if (len1 == 4)
|
|
return ((p_uuid1[0] == p_uuid2[0]) && (p_uuid1[1] == p_uuid2[1]) &&
|
|
(p_uuid1[2] == p_uuid2[2]) && (p_uuid1[3] == p_uuid2[3]));
|
|
else
|
|
return (memcmp(p_uuid1, p_uuid2, (size_t)len1) == 0);
|
|
} else if (len1 > len2) {
|
|
/* If the len1 was 4-byte, (so len2 is 2-byte), compare on the fly */
|
|
if (len1 == 4) {
|
|
return ((p_uuid1[0] == 0) && (p_uuid1[1] == 0) &&
|
|
(p_uuid1[2] == p_uuid2[0]) && (p_uuid1[3] == p_uuid2[1]));
|
|
} else {
|
|
/* Normalize UUIDs to 16-byte form, then compare. Len1 must be 16 */
|
|
memcpy(nu1, p_uuid1, Uuid::kNumBytes128);
|
|
memcpy(nu2, sdp_base_uuid, Uuid::kNumBytes128);
|
|
|
|
if (len2 == 4)
|
|
memcpy(nu2, p_uuid2, len2);
|
|
else if (len2 == 2)
|
|
memcpy(nu2 + 2, p_uuid2, len2);
|
|
|
|
return (memcmp(nu1, nu2, Uuid::kNumBytes128) == 0);
|
|
}
|
|
} else {
|
|
/* len2 is greater than len1 */
|
|
/* If the len2 was 4-byte, (so len1 is 2-byte), compare on the fly */
|
|
if (len2 == 4) {
|
|
return ((p_uuid2[0] == 0) && (p_uuid2[1] == 0) &&
|
|
(p_uuid2[2] == p_uuid1[0]) && (p_uuid2[3] == p_uuid1[1]));
|
|
} else {
|
|
/* Normalize UUIDs to 16-byte form, then compare. Len1 must be 16 */
|
|
memcpy(nu2, p_uuid2, Uuid::kNumBytes128);
|
|
memcpy(nu1, sdp_base_uuid, Uuid::kNumBytes128);
|
|
|
|
if (len1 == 4)
|
|
memcpy(nu1, p_uuid1, (size_t)len1);
|
|
else if (len1 == 2)
|
|
memcpy(nu1 + 2, p_uuid1, (size_t)len1);
|
|
|
|
return (memcmp(nu1, nu2, Uuid::kNumBytes128) == 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_compare_uuid_with_attr
|
|
*
|
|
* Description This function compares a BT UUID structure with the UUID in
|
|
* an SDP attribute record. If needed, they are expanded to
|
|
* 128-bit UUIDs, then compared.
|
|
*
|
|
* NOTE - it is assumed that BT UUID structures are compressed to the
|
|
* smallest possible UUIDs (by removing the base SDP UUID).
|
|
* - it is also assumed that the discovery atribute is compressed
|
|
* to the smallest possible
|
|
*
|
|
* Returns true if matched, else false
|
|
*
|
|
******************************************************************************/
|
|
bool sdpu_compare_uuid_with_attr(const Uuid& uuid, tSDP_DISC_ATTR* p_attr) {
|
|
int len = uuid.GetShortestRepresentationSize();
|
|
if (len == 2) return uuid.As16Bit() == p_attr->attr_value.v.u16;
|
|
if (len == 4) return uuid.As32Bit() == p_attr->attr_value.v.u32;
|
|
if (memcmp(uuid.To128BitBE().data(), (void*)p_attr->attr_value.v.array,
|
|
Uuid::kNumBytes128) == 0)
|
|
return (true);
|
|
|
|
return (false);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_sort_attr_list
|
|
*
|
|
* Description sorts a list of attributes in numeric order from lowest to
|
|
* highest to conform to SDP specification
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
void sdpu_sort_attr_list(uint16_t num_attr, tSDP_DISCOVERY_DB* p_db) {
|
|
uint16_t i;
|
|
uint16_t x;
|
|
|
|
/* Done if no attributes to sort */
|
|
if (num_attr <= 1) {
|
|
return;
|
|
} else if (num_attr > SDP_MAX_ATTR_FILTERS) {
|
|
num_attr = SDP_MAX_ATTR_FILTERS;
|
|
}
|
|
|
|
num_attr--; /* for the for-loop */
|
|
for (i = 0; i < num_attr;) {
|
|
if (p_db->attr_filters[i] > p_db->attr_filters[i + 1]) {
|
|
/* swap the attribute IDs and start from the beginning */
|
|
x = p_db->attr_filters[i];
|
|
p_db->attr_filters[i] = p_db->attr_filters[i + 1];
|
|
p_db->attr_filters[i + 1] = x;
|
|
|
|
i = 0;
|
|
} else
|
|
i++;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_get_list_len
|
|
*
|
|
* Description gets the total list length in the sdp database for a given
|
|
* uid sequence and attr sequence
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
uint16_t sdpu_get_list_len(tSDP_UUID_SEQ* uid_seq, tSDP_ATTR_SEQ* attr_seq) {
|
|
tSDP_RECORD* p_rec;
|
|
uint16_t len = 0;
|
|
uint16_t len1;
|
|
|
|
for (p_rec = sdp_db_service_search(NULL, uid_seq); p_rec;
|
|
p_rec = sdp_db_service_search(p_rec, uid_seq)) {
|
|
len += 3;
|
|
|
|
len1 = sdpu_get_attrib_seq_len(p_rec, attr_seq);
|
|
|
|
if (len1 != 0)
|
|
len += len1;
|
|
else
|
|
len -= 3;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_get_attrib_seq_len
|
|
*
|
|
* Description gets the length of the specific attributes in a given
|
|
* sdp record
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
uint16_t sdpu_get_attrib_seq_len(tSDP_RECORD* p_rec, tSDP_ATTR_SEQ* attr_seq) {
|
|
tSDP_ATTRIBUTE* p_attr;
|
|
uint16_t len1 = 0;
|
|
uint16_t xx;
|
|
bool is_range = false;
|
|
uint16_t start_id = 0, end_id = 0;
|
|
|
|
for (xx = 0; xx < attr_seq->num_attr; xx++) {
|
|
if (!is_range) {
|
|
start_id = attr_seq->attr_entry[xx].start;
|
|
end_id = attr_seq->attr_entry[xx].end;
|
|
}
|
|
p_attr = sdp_db_find_attr_in_rec(p_rec, start_id, end_id);
|
|
if (p_attr) {
|
|
len1 += sdpu_get_attrib_entry_len(p_attr);
|
|
|
|
/* If doing a range, stick with this one till no more attributes found */
|
|
if (start_id != end_id) {
|
|
/* Update for next time through */
|
|
start_id = p_attr->id + 1;
|
|
xx--;
|
|
is_range = true;
|
|
} else
|
|
is_range = false;
|
|
} else
|
|
is_range = false;
|
|
}
|
|
return len1;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_get_attrib_entry_len
|
|
*
|
|
* Description gets the length of a specific attribute
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
uint16_t sdpu_get_attrib_entry_len(tSDP_ATTRIBUTE* p_attr) {
|
|
uint16_t len = 3;
|
|
|
|
/* the attribute is in the db record.
|
|
* assuming the attribute len is less than SDP_MAX_ATTR_LEN */
|
|
switch (p_attr->type) {
|
|
case TEXT_STR_DESC_TYPE: /* 4 */
|
|
case DATA_ELE_SEQ_DESC_TYPE: /* 6 */
|
|
case DATA_ELE_ALT_DESC_TYPE: /* 7 */
|
|
case URL_DESC_TYPE: /* 8 */
|
|
#if (SDP_MAX_ATTR_LEN > 0xFFFF)
|
|
if (p_attr->len > 0xFFFF) {
|
|
len += 5;
|
|
} else
|
|
#endif /* 0xFFFF - 0xFF */
|
|
#if (SDP_MAX_ATTR_LEN > 0xFF)
|
|
if (p_attr->len > 0xFF) {
|
|
len += 3;
|
|
} else
|
|
#endif /* 0xFF and less*/
|
|
{
|
|
len += 2;
|
|
}
|
|
len += p_attr->len;
|
|
return len;
|
|
}
|
|
|
|
/* Now, the attribute value */
|
|
switch (p_attr->len) {
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
case 8:
|
|
case 16:
|
|
len += 1;
|
|
break;
|
|
default:
|
|
len += 2;
|
|
break;
|
|
}
|
|
|
|
len += p_attr->len;
|
|
return len;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_build_partial_attrib_entry
|
|
*
|
|
* Description This function fills a buffer with partial attribute. It is
|
|
* assumed that the maximum size of any attribute is 256 bytes.
|
|
*
|
|
* p_out: output buffer
|
|
* p_attr: attribute to be copied partially into p_out
|
|
* rem_len: num bytes to copy into p_out
|
|
* offset: current start offset within the attr that needs to
|
|
* be copied
|
|
*
|
|
* Returns Pointer to next byte in the output buffer.
|
|
* offset is also updated
|
|
*
|
|
******************************************************************************/
|
|
uint8_t* sdpu_build_partial_attrib_entry(uint8_t* p_out, tSDP_ATTRIBUTE* p_attr,
|
|
uint16_t len, uint16_t* offset) {
|
|
uint8_t* p_attr_buff =
|
|
(uint8_t*)osi_malloc(sizeof(uint8_t) * SDP_MAX_ATTR_LEN);
|
|
sdpu_build_attrib_entry(p_attr_buff, p_attr);
|
|
|
|
uint16_t attr_len = sdpu_get_attrib_entry_len(p_attr);
|
|
|
|
if (len > SDP_MAX_ATTR_LEN) {
|
|
SDP_TRACE_ERROR("%s len %d exceeds SDP_MAX_ATTR_LEN", __func__, len);
|
|
len = SDP_MAX_ATTR_LEN;
|
|
}
|
|
|
|
size_t len_to_copy =
|
|
((attr_len - *offset) < len) ? (attr_len - *offset) : len;
|
|
memcpy(p_out, &p_attr_buff[*offset], len_to_copy);
|
|
|
|
p_out = &p_out[len_to_copy];
|
|
*offset += len_to_copy;
|
|
|
|
osi_free(p_attr_buff);
|
|
return p_out;
|
|
}
|
|
/*******************************************************************************
|
|
*
|
|
* Function sdpu_is_avrcp_profile_description_list
|
|
*
|
|
* Description This function is to check if attirbute contain AVRCP profile
|
|
* description list
|
|
*
|
|
* p_attr: attibute to be check
|
|
*
|
|
* Returns AVRCP profile version if matched, else 0
|
|
*
|
|
******************************************************************************/
|
|
uint16_t sdpu_is_avrcp_profile_description_list(tSDP_ATTRIBUTE* p_attr) {
|
|
if (p_attr->id != ATTR_ID_BT_PROFILE_DESC_LIST || p_attr->len != 8) {
|
|
return 0;
|
|
}
|
|
|
|
uint8_t* p_uuid = p_attr->value_ptr + 3;
|
|
// Check if AVRCP profile UUID
|
|
if (p_uuid[0] != 0x11 || p_uuid[1] != 0xe) {
|
|
return 0;
|
|
}
|
|
uint8_t p_version = *(p_uuid + 4);
|
|
switch (p_version) {
|
|
case 0x0:
|
|
return AVRC_REV_1_0;
|
|
case 0x3:
|
|
return AVRC_REV_1_3;
|
|
case 0x4:
|
|
return AVRC_REV_1_4;
|
|
case 0x5:
|
|
return AVRC_REV_1_5;
|
|
case 0x6:
|
|
return AVRC_REV_1_6;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|