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 static void avrcp_browsing_target_emit_set_browsed_player(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t browsed_player_id){ 123 btstack_assert(callback != NULL); 124 125 uint8_t event[10]; 126 int pos = 0; 127 event[pos++] = HCI_EVENT_AVRCP_META; 128 event[pos++] = sizeof(event) - 2; 129 event[pos++] = AVRCP_SUBEVENT_BROWSING_SET_BROWSED_PLAYER; 130 little_endian_store_16(event, pos, browsing_cid); 131 pos += 2; 132 little_endian_store_16(event, pos, browsed_player_id); 133 pos += 2; 134 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 135 } 136 137 138 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 139 UNUSED(size); 140 avrcp_browsing_connection_t * browsing_connection; 141 142 switch (packet_type) { 143 case L2CAP_DATA_PACKET:{ 144 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 145 if (!browsing_connection) break; 146 int pos = 0; 147 uint8_t transport_header = packet[pos++]; 148 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 149 browsing_connection->transaction_label = transport_header >> 4; 150 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 151 switch (avctp_packet_type){ 152 case AVRCP_SINGLE_PACKET: 153 case AVRCP_START_PACKET: 154 browsing_connection->subunit_type = packet[pos++] >> 2; 155 browsing_connection->subunit_id = 0; 156 browsing_connection->command_opcode = packet[pos++]; 157 browsing_connection->num_packets = 1; 158 if (avctp_packet_type == AVRCP_START_PACKET){ 159 browsing_connection->num_packets = packet[pos++]; 160 } 161 browsing_connection->pdu_id = packet[pos++]; 162 break; 163 default: 164 break; 165 } 166 switch (avctp_packet_type){ 167 case AVRCP_SINGLE_PACKET: 168 case AVRCP_END_PACKET: 169 switch(browsing_connection->pdu_id){ 170 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 171 browsing_connection->scope = packet[pos++]; 172 browsing_connection->start_item = big_endian_read_32(packet, pos); 173 pos += 4; 174 browsing_connection->end_item = big_endian_read_32(packet, pos); 175 pos += 4; 176 uint8_t attr_count = packet[pos++]; 177 178 while (attr_count){ 179 uint32_t attr_id = big_endian_read_32(packet, pos); 180 pos += 4; 181 browsing_connection->attr_bitmap |= (1 << attr_id); 182 attr_count--; 183 } 184 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 185 break; 186 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 187 // send total num items 188 browsing_connection->scope = packet[pos++]; 189 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 190 break; 191 } 192 case AVRCP_PDU_ID_SET_BROWSED_PLAYER: 193 // param length (2), player_id (2) 194 if (big_endian_read_16(packet, pos) != 2){ 195 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 196 break; 197 } 198 avrcp_browsing_target_emit_set_browsed_player(avrcp_target_context.browsing_avrcp_callback, channel, big_endian_read_16(packet, pos+2)); 199 break; 200 default: 201 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 202 log_info("not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 203 break; 204 } 205 browsing_connection->state = AVCTP_CONNECTION_OPENED; 206 break; 207 default: 208 break; 209 } 210 break; 211 } 212 213 case HCI_EVENT_PACKET: 214 switch (hci_event_packet_get_type(packet)){ 215 case L2CAP_EVENT_CAN_SEND_NOW: 216 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 217 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 218 browsing_connection->state = AVCTP_CONNECTION_OPENED; 219 avrcp_browsing_target_handle_can_send_now(browsing_connection); 220 break; 221 default: 222 break; 223 } 224 break; 225 226 default: 227 break; 228 } 229 } 230 231 void avrcp_browsing_target_init(void){ 232 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 233 avrcp_browsing_register_target_packet_handler(avrcp_browsing_target_packet_handler); 234 } 235 236 void avrcp_browsing_target_deinit(void){ 237 avrcp_controller_context.browsing_packet_handler = NULL; 238 } 239 240 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 241 btstack_assert(callback != NULL); 242 avrcp_target_context.browsing_avrcp_callback = callback; 243 } 244 245 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){ 246 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 247 if (!avrcp_connection){ 248 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 249 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 250 } 251 252 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 253 if (!connection){ 254 log_info("Could not find a browsing connection."); 255 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 256 } 257 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 258 259 // TODO: handle response to SetAddressedPlayer 260 261 uint16_t pos = 0; 262 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 263 big_endian_store_16(connection->cmd_operands, pos, attr_list_size); 264 pos += 2; 265 266 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 267 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 268 pos += 2; 269 270 // TODO: fragmentation 271 if (attr_list_size > sizeof(connection->cmd_operands)){ 272 connection->attr_list = attr_list; 273 connection->attr_list_size = attr_list_size; 274 log_info(" todo: list too big, invoke fragmentation"); 275 return 1; 276 } 277 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 278 pos += attr_list_size; 279 connection->cmd_operands_length = pos; 280 281 connection->state = AVCTP_W2_SEND_RESPONSE; 282 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 283 return ERROR_CODE_SUCCESS; 284 } 285 286 uint8_t avrcp_browsing_target_send_accept_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint16_t browsed_player_id, uint8_t * response, uint16_t response_size){ 287 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 288 if (!avrcp_connection){ 289 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 290 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 291 } 292 293 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 294 if (!connection){ 295 log_info("Could not find a browsing connection."); 296 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 297 } 298 299 if (connection->state != AVCTP_CONNECTION_OPENED) { 300 log_info("Browsing connection wrong state."); 301 return ERROR_CODE_COMMAND_DISALLOWED; 302 } 303 304 connection->browsed_player_id = browsed_player_id; 305 306 uint16_t pos = 0; 307 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 308 big_endian_store_16(connection->cmd_operands, pos, response_size + 2 + 1); // uuid counter + status 309 pos += 2; 310 311 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 312 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 313 pos += 2; 314 315 // TODO: fragmentation 316 if (response_size > sizeof(connection->cmd_operands)){ 317 connection->attr_list = response; 318 connection->attr_list_size = response_size; 319 log_info(" todo: list too big, invoke fragmentation"); 320 return 1; 321 } 322 323 (void)memcpy(&connection->cmd_operands[pos], response, response_size); 324 pos += response_size; 325 connection->cmd_operands_length = pos; 326 327 connection->state = AVCTP_W2_SEND_RESPONSE; 328 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 329 return ERROR_CODE_SUCCESS; 330 } 331 332 uint8_t avrcp_browsing_target_send_reject_set_browsed_player(uint16_t avrcp_browsing_cid, avrcp_status_code_t status){ 333 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 334 if (!avrcp_connection){ 335 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 336 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 337 } 338 339 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 340 if (!connection){ 341 log_info("Could not find a browsing connection."); 342 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 343 } 344 345 if (connection->state != AVCTP_CONNECTION_OPENED) { 346 log_info("Browsing connection wrong state."); 347 return ERROR_CODE_COMMAND_DISALLOWED; 348 } 349 350 int pos = 0; 351 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 352 big_endian_store_16(connection->cmd_operands, pos, 1); 353 connection->cmd_operands[pos++] = status; 354 connection->cmd_operands_length = pos; 355 356 connection->state = AVCTP_W2_SEND_RESPONSE; 357 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 358 return ERROR_CODE_SUCCESS; 359 } 360 361 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){ 362 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 363 if (!avrcp_connection){ 364 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 365 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 366 } 367 368 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 369 if (!connection){ 370 log_info("Could not find a browsing connection."); 371 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 372 } 373 374 if (connection->state != AVCTP_CONNECTION_OPENED) { 375 log_info("Browsing connection wrong state."); 376 return ERROR_CODE_COMMAND_DISALLOWED; 377 } 378 379 int pos = 0; 380 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 381 big_endian_store_16(connection->cmd_operands, pos, 7); 382 pos += 2; 383 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 384 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 385 pos += 2; 386 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 387 pos += 4; 388 connection->cmd_operands_length = pos; 389 390 connection->state = AVCTP_W2_SEND_RESPONSE; 391 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 392 return ERROR_CODE_SUCCESS; 393 } 394 395