1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp_browsing_target.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <inttypes.h> 43 #include "classic/avrcp.h" 44 #include "classic/avrcp_browsing.h" 45 #include "classic/avrcp_browsing_target.h" 46 #include "classic/avrcp_target.h" 47 #include "classic/avrcp_controller.h" 48 49 #include "bluetooth_sdp.h" 50 #include "btstack_debug.h" 51 #include "btstack_event.h" 52 53 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 54 55 static int avrcp_browsing_target_handle_can_send_now(avrcp_browsing_connection_t * connection){ 56 int pos = 0; 57 58 // l2cap_reserve_packet_buffer(); 59 // uint8_t * packet = l2cap_get_outgoing_buffer(); 60 uint8_t packet[300]; 61 connection->packet_type = AVRCP_SINGLE_PACKET; 62 63 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 64 // Profile IDentifier (PID) 65 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 66 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 67 (void)memcpy(packet + pos, connection->cmd_operands, 68 connection->cmd_operands_length); 69 70 pos += connection->cmd_operands_length; 71 connection->wait_to_send = false; 72 // return l2cap_send_prepared(connection->l2cap_browsing_cid, pos); 73 return l2cap_send(connection->l2cap_browsing_cid, packet, pos); 74 } 75 76 77 static uint8_t avrcp_browsing_target_response_general_reject(avrcp_browsing_connection_t * connection, avrcp_status_code_t status){ 78 // AVRCP_CTYPE_RESPONSE_REJECTED 79 int pos = 0; 80 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 81 // connection->cmd_operands[pos++] = 0; 82 // param length 83 big_endian_store_16(connection->cmd_operands, pos, 1); 84 pos += 2; 85 connection->cmd_operands[pos++] = status; 86 connection->cmd_operands_length = 4; 87 connection->state = AVCTP_W2_SEND_RESPONSE; 88 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 89 return ERROR_CODE_SUCCESS; 90 } 91 92 static void avrcp_browsing_target_emit_get_folder_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 93 btstack_assert(callback != NULL); 94 95 uint8_t event[10]; 96 int pos = 0; 97 event[pos++] = HCI_EVENT_AVRCP_META; 98 event[pos++] = sizeof(event) - 2; 99 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_FOLDER_ITEMS; 100 little_endian_store_16(event, pos, browsing_cid); 101 pos += 2; 102 event[pos++] = connection->scope; 103 big_endian_store_32(event, pos, connection->attr_bitmap); 104 pos += 4; 105 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 106 } 107 108 static void avrcp_browsing_target_emit_get_total_num_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 109 btstack_assert(callback != NULL); 110 111 uint8_t event[10]; 112 int pos = 0; 113 event[pos++] = HCI_EVENT_AVRCP_META; 114 event[pos++] = sizeof(event) - 2; 115 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_TOTAL_NUM_ITEMS; 116 little_endian_store_16(event, pos, browsing_cid); 117 pos += 2; 118 event[pos++] = connection->scope; 119 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 120 } 121 122 123 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 124 UNUSED(size); 125 avrcp_browsing_connection_t * browsing_connection; 126 127 switch (packet_type) { 128 case L2CAP_DATA_PACKET:{ 129 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 130 if (!browsing_connection) break; 131 int pos = 0; 132 uint8_t transport_header = packet[pos++]; 133 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 134 browsing_connection->transaction_label = transport_header >> 4; 135 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 136 switch (avctp_packet_type){ 137 case AVRCP_SINGLE_PACKET: 138 case AVRCP_START_PACKET: 139 browsing_connection->subunit_type = packet[pos++] >> 2; 140 browsing_connection->subunit_id = 0; 141 browsing_connection->command_opcode = packet[pos++]; 142 browsing_connection->num_packets = 1; 143 if (avctp_packet_type == AVRCP_START_PACKET){ 144 browsing_connection->num_packets = packet[pos++]; 145 } 146 browsing_connection->pdu_id = packet[pos++]; 147 break; 148 default: 149 break; 150 } 151 switch (avctp_packet_type){ 152 case AVRCP_SINGLE_PACKET: 153 case AVRCP_END_PACKET: 154 switch(browsing_connection->pdu_id){ 155 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 156 browsing_connection->scope = packet[pos++]; 157 browsing_connection->start_item = big_endian_read_32(packet, pos); 158 pos += 4; 159 browsing_connection->end_item = big_endian_read_32(packet, pos); 160 pos += 4; 161 uint8_t attr_count = packet[pos++]; 162 163 while (attr_count){ 164 uint32_t attr_id = big_endian_read_32(packet, pos); 165 pos += 4; 166 browsing_connection->attr_bitmap |= (1 << attr_id); 167 attr_count--; 168 } 169 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 170 break; 171 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 172 // send total num items 173 browsing_connection->scope = packet[pos++]; 174 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 175 break; 176 } 177 default: 178 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 179 log_info("not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 180 break; 181 } 182 browsing_connection->state = AVCTP_CONNECTION_OPENED; 183 break; 184 default: 185 break; 186 } 187 break; 188 } 189 190 case HCI_EVENT_PACKET: 191 switch (hci_event_packet_get_type(packet)){ 192 case L2CAP_EVENT_CAN_SEND_NOW: 193 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 194 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 195 browsing_connection->state = AVCTP_CONNECTION_OPENED; 196 avrcp_browsing_target_handle_can_send_now(browsing_connection); 197 break; 198 default: 199 break; 200 } 201 break; 202 203 default: 204 break; 205 } 206 } 207 208 void avrcp_browsing_target_init(void){ 209 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 210 avrcp_browsing_register_target_packet_handler(avrcp_browsing_target_packet_handler); 211 } 212 213 void avrcp_browsing_target_deinit(void){ 214 avrcp_controller_context.browsing_packet_handler = NULL; 215 } 216 217 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 218 btstack_assert(callback != NULL); 219 avrcp_target_context.browsing_avrcp_callback = callback; 220 } 221 222 uint8_t avrcp_browsing_target_send_get_folder_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint8_t * attr_list, uint16_t attr_list_size){ 223 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 224 if (!avrcp_connection){ 225 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 226 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 227 } 228 229 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 230 if (!connection){ 231 log_info("Could not find a browsing connection."); 232 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 233 } 234 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 235 236 // TODO: handle response to SetAddressedPlayer 237 238 uint16_t pos = 0; 239 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 240 big_endian_store_16(connection->cmd_operands, pos, attr_list_size); 241 pos += 2; 242 243 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 244 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 245 pos += 2; 246 247 // TODO: fragmentation 248 if (attr_list_size > sizeof(connection->cmd_operands)){ 249 connection->attr_list = attr_list; 250 connection->attr_list_size = attr_list_size; 251 log_info(" todo: list too big, invoke fragmentation"); 252 return 1; 253 } 254 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 255 pos += attr_list_size; 256 connection->cmd_operands_length = pos; 257 258 connection->state = AVCTP_W2_SEND_RESPONSE; 259 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 260 return ERROR_CODE_SUCCESS; 261 } 262 263 264 uint8_t avrcp_browsing_target_send_get_total_num_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint32_t total_num_items){ 265 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 266 if (!avrcp_connection){ 267 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 268 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 269 } 270 271 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 272 if (!connection){ 273 log_info("Could not find a browsing connection."); 274 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 275 } 276 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 277 278 if (connection->state != AVCTP_CONNECTION_OPENED) { 279 log_info("Browsing connection wrong state."); 280 return ERROR_CODE_COMMAND_DISALLOWED; 281 } 282 283 int pos = 0; 284 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 285 big_endian_store_16(connection->cmd_operands, pos, 7); 286 pos += 2; 287 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 288 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 289 pos += 2; 290 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 291 pos += 4; 292 connection->cmd_operands_length = pos; 293 294 connection->state = AVCTP_W2_SEND_RESPONSE; 295 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 296 return ERROR_CODE_SUCCESS; 297 } 298 299