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