| /****************************************************************************** |
| * |
| * Copyright 1999-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * This file contains SDP utility functions |
| * |
| ******************************************************************************/ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <utility> |
| #include <vector> |
| |
| #include "bt_common.h" |
| #include "bt_types.h" |
| #include "btif_config.h" |
| |
| #include "avrc_defs.h" |
| #include "sdp_api.h" |
| #include "sdpint.h" |
| |
| #include "stack/include/stack_metrics_logging.h" |
| |
| using bluetooth::Uuid; |
| static const uint8_t sdp_base_uuid[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x10, 0x00, 0x80, 0x00, 0x00, 0x80, |
| 0x5F, 0x9B, 0x34, 0xFB}; |
| |
| template <typename T> |
| static std::array<char, sizeof(T)> to_little_endian_array(T x) { |
| static_assert(std::is_integral<T>::value, |
| "to_little_endian_array parameter must be integral."); |
| std::array<char, sizeof(T)> array = {}; |
| for (size_t i = 0; i < array.size(); i++) { |
| array[i] = static_cast<char>((x >> (8 * i)) & 0xFF); |
| } |
| return array; |
| } |
| |
| /** |
| * Find the list of profile versions from Bluetooth Profile Descriptor list |
| * attribute in a SDP record |
| * |
| * @param p_rec SDP record to search |
| * @return a vector of <UUID, VERSION> pairs, empty if not found |
| */ |
| static std::vector<std::pair<uint16_t, uint16_t>> sdpu_find_profile_version( |
| tSDP_DISC_REC* p_rec) { |
| std::vector<std::pair<uint16_t, uint16_t>> result; |
| for (tSDP_DISC_ATTR* p_attr = p_rec->p_first_attr; p_attr != nullptr; |
| p_attr = p_attr->p_next_attr) { |
| // Find the profile descriptor list */ |
| if (p_attr->attr_id != ATTR_ID_BT_PROFILE_DESC_LIST || |
| SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) != DATA_ELE_SEQ_DESC_TYPE) { |
| continue; |
| } |
| // Walk through the protocol descriptor list |
| for (tSDP_DISC_ATTR* p_sattr = p_attr->attr_value.v.p_sub_attr; |
| p_sattr != nullptr; p_sattr = p_sattr->p_next_attr) { |
| // Safety check - each entry should itself be a sequence |
| if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) != |
| DATA_ELE_SEQ_DESC_TYPE) { |
| LOG(WARNING) << __func__ << ": Descriptor type is not sequence: " |
| << loghex(SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type)); |
| return std::vector<std::pair<uint16_t, uint16_t>>(); |
| } |
| // Now, see if the entry contains the profile UUID we are interested in |
| for (tSDP_DISC_ATTR* p_ssattr = p_sattr->attr_value.v.p_sub_attr; |
| p_ssattr != nullptr; p_ssattr = p_ssattr->p_next_attr) { |
| if (SDP_DISC_ATTR_TYPE(p_ssattr->attr_len_type) != UUID_DESC_TYPE || |
| SDP_DISC_ATTR_LEN(p_ssattr->attr_len_type) != 2) { |
| continue; |
| } |
| uint16_t uuid = p_ssattr->attr_value.v.u16; |
| // Next attribute should be the version attribute |
| tSDP_DISC_ATTR* version_attr = p_ssattr->p_next_attr; |
| if (SDP_DISC_ATTR_TYPE(version_attr->attr_len_type) != UINT_DESC_TYPE || |
| SDP_DISC_ATTR_LEN(version_attr->attr_len_type) != 2) { |
| LOG(WARNING) << __func__ << ": Bad version type " |
| << loghex( |
| SDP_DISC_ATTR_TYPE(version_attr->attr_len_type)) |
| << ", or length " |
| << SDP_DISC_ATTR_LEN(version_attr->attr_len_type); |
| return std::vector<std::pair<uint16_t, uint16_t>>(); |
| } |
| // High order 8 bits is the major number, low order is the |
| // minor number (big endian) |
| uint16_t version = version_attr->attr_value.v.u16; |
| result.emplace_back(uuid, version); |
| } |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Find the most specific 16-bit service uuid represented by a SDP record |
| * |
| * @param p_rec pointer to a SDP record |
| * @return most specific 16-bit service uuid, 0 if not found |
| */ |
| static uint16_t sdpu_find_most_specific_service_uuid(tSDP_DISC_REC* p_rec) { |
| for (tSDP_DISC_ATTR* p_attr = p_rec->p_first_attr; p_attr != nullptr; |
| p_attr = p_attr->p_next_attr) { |
| if (p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST && |
| SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE) { |
| tSDP_DISC_ATTR* p_first_attr = p_attr->attr_value.v.p_sub_attr; |
| if (SDP_DISC_ATTR_TYPE(p_first_attr->attr_len_type) == UUID_DESC_TYPE && |
| SDP_DISC_ATTR_LEN(p_first_attr->attr_len_type) == 2) { |
| return p_first_attr->attr_value.v.u16; |
| } else if (SDP_DISC_ATTR_TYPE(p_first_attr->attr_len_type) == |
| DATA_ELE_SEQ_DESC_TYPE) { |
| // Workaround for Toyota G Block car kit: |
| // It incorrectly puts an extra data element sequence in this attribute |
| for (tSDP_DISC_ATTR* p_extra_sattr = |
| p_first_attr->attr_value.v.p_sub_attr; |
| p_extra_sattr != nullptr; |
| p_extra_sattr = p_extra_sattr->p_next_attr) { |
| // Return the first UUID data element |
| if (SDP_DISC_ATTR_TYPE(p_extra_sattr->attr_len_type) == |
| UUID_DESC_TYPE && |
| SDP_DISC_ATTR_LEN(p_extra_sattr->attr_len_type) == 2) { |
| return p_extra_sattr->attr_value.v.u16; |
| } |
| } |
| } else { |
| LOG(WARNING) << __func__ << ": Bad Service Class ID list attribute"; |
| return 0; |
| } |
| } else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) { |
| if (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE && |
| SDP_DISC_ATTR_LEN(p_attr->attr_len_type) == 2) { |
| return p_attr->attr_value.v.u16; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| void sdpu_log_attribute_metrics(const RawAddress& bda, |
| tSDP_DISCOVERY_DB* p_db) { |
| CHECK_NE(p_db, nullptr); |
| bool has_di_record = false; |
| for (tSDP_DISC_REC* p_rec = p_db->p_first_rec; p_rec != nullptr; |
| p_rec = p_rec->p_next_rec) { |
| uint16_t service_uuid = sdpu_find_most_specific_service_uuid(p_rec); |
| if (service_uuid == 0) { |
| LOG(INFO) << __func__ << ": skipping record without service uuid " << bda; |
| continue; |
| } |
| // Log the existence of a profile role |
| // This can be different from Bluetooth Profile Descriptor List |
| log_sdp_attribute(bda, service_uuid, 0, 0, nullptr); |
| // Log profile version from Bluetooth Profile Descriptor List |
| auto uuid_version_array = sdpu_find_profile_version(p_rec); |
| for (const auto& uuid_version_pair : uuid_version_array) { |
| uint16_t profile_uuid = uuid_version_pair.first; |
| uint16_t version = uuid_version_pair.second; |
| auto version_array = to_little_endian_array(version); |
| log_sdp_attribute(bda, profile_uuid, ATTR_ID_BT_PROFILE_DESC_LIST, |
| version_array.size(), version_array.data()); |
| } |
| // Log protocol version from Protocol Descriptor List |
| uint16_t protocol_uuid = 0; |
| switch (service_uuid) { |
| case UUID_SERVCLASS_AUDIO_SOURCE: |
| case UUID_SERVCLASS_AUDIO_SINK: |
| protocol_uuid = UUID_PROTOCOL_AVDTP; |
| break; |
| case UUID_SERVCLASS_AV_REMOTE_CONTROL: |
| case UUID_SERVCLASS_AV_REM_CTRL_CONTROL: |
| case UUID_SERVCLASS_AV_REM_CTRL_TARGET: |
| protocol_uuid = UUID_PROTOCOL_AVCTP; |
| break; |
| case UUID_SERVCLASS_PANU: |
| case UUID_SERVCLASS_GN: |
| protocol_uuid = UUID_PROTOCOL_BNEP; |
| break; |
| } |
| if (protocol_uuid != 0) { |
| tSDP_PROTOCOL_ELEM protocol_elements = {}; |
| if (SDP_FindProtocolListElemInRec(p_rec, protocol_uuid, |
| &protocol_elements)) { |
| if (protocol_elements.num_params >= 1) { |
| uint16_t version = protocol_elements.params[0]; |
| auto version_array = to_little_endian_array(version); |
| log_sdp_attribute(bda, protocol_uuid, ATTR_ID_PROTOCOL_DESC_LIST, |
| version_array.size(), version_array.data()); |
| } |
| } |
| } |
| // Log profile supported features from various supported feature attributes |
| switch (service_uuid) { |
| case UUID_SERVCLASS_AG_HANDSFREE: |
| case UUID_SERVCLASS_HF_HANDSFREE: |
| case UUID_SERVCLASS_AV_REMOTE_CONTROL: |
| case UUID_SERVCLASS_AV_REM_CTRL_CONTROL: |
| case UUID_SERVCLASS_AV_REM_CTRL_TARGET: |
| case UUID_SERVCLASS_AUDIO_SOURCE: |
| case UUID_SERVCLASS_AUDIO_SINK: { |
| tSDP_DISC_ATTR* p_attr = |
| SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES); |
| if (p_attr == nullptr) { |
| break; |
| } |
| uint16_t supported_features = p_attr->attr_value.v.u16; |
| auto version_array = to_little_endian_array(supported_features); |
| log_sdp_attribute(bda, service_uuid, ATTR_ID_SUPPORTED_FEATURES, |
| version_array.size(), version_array.data()); |
| break; |
| } |
| case UUID_SERVCLASS_MESSAGE_NOTIFICATION: |
| case UUID_SERVCLASS_MESSAGE_ACCESS: { |
| tSDP_DISC_ATTR* p_attr = |
| SDP_FindAttributeInRec(p_rec, ATTR_ID_MAP_SUPPORTED_FEATURES); |
| if (p_attr == nullptr) { |
| break; |
| } |
| uint32_t map_supported_features = p_attr->attr_value.v.u32; |
| auto features_array = to_little_endian_array(map_supported_features); |
| log_sdp_attribute(bda, service_uuid, ATTR_ID_MAP_SUPPORTED_FEATURES, |
| features_array.size(), features_array.data()); |
| break; |
| } |
| case UUID_SERVCLASS_PBAP_PCE: |
| case UUID_SERVCLASS_PBAP_PSE: { |
| tSDP_DISC_ATTR* p_attr = |
| SDP_FindAttributeInRec(p_rec, ATTR_ID_PBAP_SUPPORTED_FEATURES); |
| if (p_attr == nullptr) { |
| break; |
| } |
| uint32_t pbap_supported_features = p_attr->attr_value.v.u32; |
| auto features_array = to_little_endian_array(pbap_supported_features); |
| log_sdp_attribute(bda, service_uuid, ATTR_ID_PBAP_SUPPORTED_FEATURES, |
| features_array.size(), features_array.data()); |
| break; |
| } |
| } |
| if (service_uuid == UUID_SERVCLASS_PNP_INFORMATION) { |
| has_di_record = true; |
| } |
| } |
| // Log the first DI record if there is one |
| if (has_di_record) { |
| tSDP_DI_GET_RECORD di_record = {}; |
| if (SDP_GetDiRecord(1, &di_record, p_db) == SDP_SUCCESS) { |
| auto version_array = to_little_endian_array(di_record.spec_id); |
| log_sdp_attribute(bda, UUID_SERVCLASS_PNP_INFORMATION, |
| ATTR_ID_SPECIFICATION_ID, version_array.size(), |
| version_array.data()); |
| std::stringstream ss; |
| // [N - native]::SDP::[DIP - Device ID Profile] |
| ss << "N:SDP::DIP::" << loghex(di_record.rec.vendor_id_source); |
| log_manufacturer_info( |
| bda, android::bluetooth::DeviceInfoSrcEnum::DEVICE_INFO_INTERNAL, |
| ss.str(), loghex(di_record.rec.vendor), loghex(di_record.rec.product), |
| loghex(di_record.rec.version), ""); |
| |
| std::string bda_string = bda.ToString(); |
| // write manufacturer, model, HW version to config |
| btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_MANUFACTURER, |
| di_record.rec.vendor); |
| btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_MODEL, |
| di_record.rec.product); |
| btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_HW_VERSION, |
| di_record.rec.version); |
| btif_config_set_int(bda_string, BT_CONFIG_KEY_SDP_DI_VENDOR_ID_SRC, |
| di_record.rec.vendor_id_source); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function sdpu_find_ccb_by_cid |
| * |
| * Description This function searches the CCB table for an entry with the |
| * passed CID. |
| * |
| * Returns the CCB address, or NULL if not found. |
| * |
| ******************************************************************************/ |
| tCONN_CB* sdpu_find_ccb_by_cid(uint16_t cid) { |
| uint16_t xx; |
| tCONN_CB* p_ccb; |
| |
| /* Look through each connection control block */ |
| for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++) { |
| if ((p_ccb->con_state != SDP_STATE_IDLE) && (p_ccb->connection_id == cid)) |
| return (p_ccb); |
| } |
| |
| /* If here, not found */ |
| return (NULL); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function sdpu_find_ccb_by_db |
| * |
| * Description This function searches the CCB table for an entry with the |
| * passed discovery db. |
| * |
| * Returns the CCB address, or NULL if not found. |
| * |
| ******************************************************************************/ |
| tCONN_CB* sdpu_find_ccb_by_db(tSDP_DISCOVERY_DB* p_db) { |
| uint16_t xx; |
| tCONN_CB* p_ccb; |
| |
| if (p_db) { |
| /* Look through each connection control block */ |
| for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++) { |
| if ((p_ccb->con_state != SDP_STATE_IDLE) && (p_ccb->p_db == p_db)) |
| return (p_ccb); |
| } |
| } |
| /* If here, not found */ |
| return (NULL); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function sdpu_allocate_ccb |
| * |
| * Description This function allocates a new CCB. |
| * |
| * Returns CCB address, or NULL if none available. |
| * |
| ******************************************************************************/ |
| tCONN_CB* sdpu_allocate_ccb(void) { |
| uint16_t xx; |
| tCONN_CB* p_ccb; |
| |
| /* Look through each connection control block for a free one */ |
| for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++) { |
| if (p_ccb->con_state == SDP_STATE_IDLE) { |
| alarm_t* alarm = p_ccb->sdp_conn_timer; |
| memset(p_ccb, 0, sizeof(tCONN_CB)); |
| p_ccb->sdp_conn_timer = alarm; |
| return (p_ccb); |
| } |
| } |
| |
| /* If here, no free CCB found */ |
| return (NULL); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function sdpu_release_ccb |
| * |
| * Description This function releases a CCB. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void sdpu_release_ccb(tCONN_CB* p_ccb) { |
| /* Ensure timer is stopped */ |
| alarm_cancel(p_ccb->sdp_conn_timer); |
| |
| /* Drop any response pointer we may be holding */ |
| p_ccb->con_state = SDP_STATE_IDLE; |
| p_ccb->is_attr_search = false; |
| |
| /* Free the response buffer */ |
| if (p_ccb->rsp_list) SDP_TRACE_DEBUG("releasing SDP rsp_list"); |
| osi_free_and_reset((void**)&p_ccb->rsp_list); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function sdpu_build_attrib_seq |
| * |
| * Description This function builds an attribute sequence from the list of |
| * passed attributes. It is also passed the address of the |
| * output buffer. |
| * |
| * Returns Pointer to next byte in the output buffer. |
| * |
| ******************************************************************************/ |
| uint8_t* sdpu_build_attrib_seq(uint8_t* p_out, uint16_t* p_attr, |
| uint16_t num_attrs) { |
| uint16_t xx; |
| |
| /* First thing is the data element header. See if the length fits 1 byte */ |
| /* If no attributes, assume a 4-byte wildcard */ |
| if (!p_attr) |
| xx = 5; |
| else |
| xx = num_attrs * 3; |
| |
| if (xx > 255) { |
| UINT8_TO_BE_STREAM(p_out, |
| (DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_WORD); |
| UINT16_TO_BE_STREAM(p_out, xx); |
| } else { |
| UINT8_TO_BE_STREAM(p_out, |
| (DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_BYTE); |
| UINT8_TO_BE_STREAM(p_out, xx); |
| } |
| |
| /* If there are no attributes specified, assume caller wants wildcard */ |
| if (!p_attr) { |
| UINT8_TO_BE_STREAM(p_out, (UINT_DESC_TYPE << 3) | SIZE_FOUR_BYTES); |
| UINT16_TO_BE_STREAM(p_out, 0); |
| UINT16_TO_BE_STREAM(p_out, 0xFFFF); |
| } 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; |
| } |
| } |
