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 BLUEKITCHEN 24 * GMBH 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->message_body[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 avctp_packet_type_t avctp_packet_type = (avctp_packet_type_t)((transport_header & 0x0F) >> 2); 151 switch (avctp_packet_type){ 152 case AVCTP_SINGLE_PACKET: 153 case AVCTP_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 == AVCTP_START_PACKET){ 159 browsing_connection->num_packets = packet[pos++]; 160 } 161 browsing_connection->pdu_id = packet[pos++]; 162 163 switch(browsing_connection->pdu_id){ 164 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 165 browsing_connection->scope = packet[pos++]; 166 browsing_connection->start_item = big_endian_read_32(packet, pos); 167 pos += 4; 168 browsing_connection->end_item = big_endian_read_32(packet, pos); 169 pos += 4; 170 uint8_t attr_count = packet[pos++]; 171 172 while (attr_count){ 173 uint32_t attr_id = big_endian_read_32(packet, pos); 174 pos += 4; 175 browsing_connection->attr_bitmap |= (1 << attr_id); 176 attr_count--; 177 } 178 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 179 break; 180 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 181 // send total num items 182 browsing_connection->scope = packet[pos++]; 183 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 184 break; 185 } 186 case AVRCP_PDU_ID_SET_BROWSED_PLAYER: 187 // param length (2), player_id (2) 188 if ( (pos + 2) > size ){ 189 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 190 break; 191 } 192 if (big_endian_read_16(packet, pos) != 2){ 193 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 194 break; 195 } 196 if ( (pos + 4) > size ){ 197 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_PLAYER_ID); 198 break; 199 } 200 201 avrcp_browsing_target_emit_set_browsed_player(avrcp_target_context.browsing_avrcp_callback, channel, big_endian_read_16(packet, pos+2)); 202 break; 203 default: 204 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 205 log_info("not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 206 break; 207 } 208 browsing_connection->state = AVCTP_CONNECTION_OPENED; 209 break; 210 default: 211 break; 212 } 213 break; 214 } 215 216 case HCI_EVENT_PACKET: 217 switch (hci_event_packet_get_type(packet)){ 218 case L2CAP_EVENT_CAN_SEND_NOW: 219 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 220 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 221 browsing_connection->state = AVCTP_CONNECTION_OPENED; 222 avrcp_browsing_target_handle_can_send_now(browsing_connection); 223 break; 224 default: 225 break; 226 } 227 break; 228 229 default: 230 break; 231 } 232 } 233 234 void avrcp_browsing_target_init(void){ 235 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 236 avrcp_browsing_register_target_packet_handler(avrcp_browsing_target_packet_handler); 237 } 238 239 void avrcp_browsing_target_deinit(void){ 240 avrcp_controller_context.browsing_packet_handler = NULL; 241 } 242 243 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 244 btstack_assert(callback != NULL); 245 avrcp_target_context.browsing_avrcp_callback = callback; 246 } 247 248 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){ 249 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 250 if (!avrcp_connection){ 251 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 252 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 253 } 254 255 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 256 if (!connection){ 257 log_info("Could not find a browsing connection."); 258 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 259 } 260 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 261 262 // TODO: handle response to SetAddressedPlayer 263 264 uint16_t pos = 0; 265 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 266 big_endian_store_16(connection->cmd_operands, pos, attr_list_size); 267 pos += 2; 268 269 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 270 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 271 pos += 2; 272 273 // TODO: fragmentation 274 if (attr_list_size > sizeof(connection->cmd_operands)){ 275 connection->attr_list = attr_list; 276 connection->attr_list_size = attr_list_size; 277 log_info(" todo: list too big, invoke fragmentation"); 278 return 1; 279 } 280 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 281 pos += attr_list_size; 282 btstack_assert(pos <= 255); 283 connection->cmd_operands_length = (uint8_t) pos; 284 285 connection->state = AVCTP_W2_SEND_RESPONSE; 286 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 287 return ERROR_CODE_SUCCESS; 288 } 289 290 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){ 291 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 292 if (!avrcp_connection){ 293 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 294 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 295 } 296 297 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 298 if (!connection){ 299 log_info("Could not find a browsing connection."); 300 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 301 } 302 303 if (connection->state != AVCTP_CONNECTION_OPENED) { 304 log_info("Browsing connection wrong state."); 305 return ERROR_CODE_COMMAND_DISALLOWED; 306 } 307 308 connection->browsed_player_id = browsed_player_id; 309 310 uint16_t pos = 0; 311 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 312 big_endian_store_16(connection->cmd_operands, pos, response_size + 2 + 1); // uuid counter + status 313 pos += 2; 314 315 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 316 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 317 pos += 2; 318 319 // TODO: fragmentation 320 if (response_size > sizeof(connection->cmd_operands)){ 321 connection->attr_list = response; 322 connection->attr_list_size = response_size; 323 log_info(" todo: list too big, invoke fragmentation"); 324 return 1; 325 } 326 327 (void)memcpy(&connection->cmd_operands[pos], response, response_size); 328 pos += response_size; 329 btstack_assert(pos <= 255); 330 connection->cmd_operands_length = (uint8_t) pos; 331 332 connection->state = AVCTP_W2_SEND_RESPONSE; 333 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 334 return ERROR_CODE_SUCCESS; 335 } 336 337 uint8_t avrcp_browsing_target_send_reject_set_browsed_player(uint16_t avrcp_browsing_cid, avrcp_status_code_t status){ 338 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 339 if (!avrcp_connection){ 340 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 341 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 342 } 343 344 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 345 if (!connection){ 346 log_info("Could not find a browsing connection."); 347 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 348 } 349 350 if (connection->state != AVCTP_CONNECTION_OPENED) { 351 log_info("Browsing connection wrong state."); 352 return ERROR_CODE_COMMAND_DISALLOWED; 353 } 354 355 int pos = 0; 356 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 357 big_endian_store_16(connection->cmd_operands, pos, 1); 358 pos += 2; 359 connection->cmd_operands[pos++] = status; 360 connection->cmd_operands_length = pos; 361 362 connection->state = AVCTP_W2_SEND_RESPONSE; 363 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 364 return ERROR_CODE_SUCCESS; 365 } 366 367 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){ 368 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 369 if (!avrcp_connection){ 370 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 371 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 372 } 373 374 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 375 if (!connection){ 376 log_info("Could not find a browsing connection."); 377 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 378 } 379 380 if (connection->state != AVCTP_CONNECTION_OPENED) { 381 log_info("Browsing connection wrong state."); 382 return ERROR_CODE_COMMAND_DISALLOWED; 383 } 384 385 int pos = 0; 386 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 387 big_endian_store_16(connection->cmd_operands, pos, 7); 388 pos += 2; 389 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 390 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 391 pos += 2; 392 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 393 pos += 4; 394 connection->cmd_operands_length = pos; 395 396 connection->state = AVCTP_W2_SEND_RESPONSE; 397 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 398 return ERROR_CODE_SUCCESS; 399 } 400 401