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 <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_browsing_target.h" 48 49 #define PSM_AVCTP_BROWSING 0x001b 50 51 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 52 53 static void avrcp_browsing_target_request_can_send_now(avrcp_browsing_connection_t * connection, uint16_t l2cap_cid){ 54 connection->wait_to_send = 1; 55 l2cap_request_can_send_now_event(l2cap_cid); 56 } 57 58 static int avrcp_browsing_target_handle_can_send_now(avrcp_browsing_connection_t * connection){ 59 int pos = 0; 60 // printf("avrcp_browsing_target_handle_can_send_now, cmd_operands_length %d\n", connection->cmd_operands_length); 61 // printf_hexdump(connection->cmd_operands, connection->cmd_operands_length); 62 63 // l2cap_reserve_packet_buffer(); 64 // uint8_t * packet = l2cap_get_outgoing_buffer(); 65 uint8_t packet[300]; 66 connection->packet_type = AVRCP_SINGLE_PACKET; 67 68 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 69 // Profile IDentifier (PID) 70 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 71 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 72 (void)memcpy(packet + pos, connection->cmd_operands, 73 connection->cmd_operands_length); 74 75 pos += connection->cmd_operands_length; 76 connection->wait_to_send = 0; 77 // return l2cap_send_prepared(connection->l2cap_browsing_cid, pos); 78 return l2cap_send(connection->l2cap_browsing_cid, packet, pos); 79 } 80 81 82 static uint8_t avrcp_browsing_target_response_general_reject(avrcp_browsing_connection_t * connection, avrcp_status_code_t status){ 83 // AVRCP_CTYPE_RESPONSE_REJECTED 84 int pos = 0; 85 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 86 // connection->cmd_operands[pos++] = 0; 87 // param length 88 big_endian_store_16(connection->cmd_operands, pos, 1); 89 pos += 2; 90 connection->cmd_operands[pos++] = status; 91 connection->cmd_operands_length = 4; 92 connection->state = AVCTP_W2_SEND_RESPONSE; 93 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 94 return ERROR_CODE_SUCCESS; 95 } 96 97 static void avrcp_browsing_target_emit_get_folder_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 98 btstack_assert(callback != NULL); 99 100 uint8_t event[10]; 101 int pos = 0; 102 event[pos++] = HCI_EVENT_AVRCP_META; 103 event[pos++] = sizeof(event) - 2; 104 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_FOLDER_ITEMS; 105 little_endian_store_16(event, pos, browsing_cid); 106 pos += 2; 107 event[pos++] = connection->scope; 108 big_endian_store_32(event, pos, connection->attr_bitmap); 109 pos += 4; 110 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 111 } 112 113 static void avrcp_browsing_target_emit_get_total_num_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 114 btstack_assert(callback != NULL); 115 116 uint8_t event[10]; 117 int pos = 0; 118 event[pos++] = HCI_EVENT_AVRCP_META; 119 event[pos++] = sizeof(event) - 2; 120 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_TOTAL_NUM_ITEMS; 121 little_endian_store_16(event, pos, browsing_cid); 122 pos += 2; 123 event[pos++] = connection->scope; 124 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 125 } 126 127 128 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 129 avrcp_browsing_connection_t * browsing_connection; 130 131 switch (packet_type) { 132 case L2CAP_DATA_PACKET:{ 133 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 134 if (!browsing_connection) break; 135 int pos = 0; 136 uint8_t transport_header = packet[pos++]; 137 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 138 browsing_connection->transaction_label = transport_header >> 4; 139 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 140 switch (avctp_packet_type){ 141 case AVRCP_SINGLE_PACKET: 142 case AVRCP_START_PACKET: 143 browsing_connection->subunit_type = packet[pos++] >> 2; 144 browsing_connection->subunit_id = 0; 145 browsing_connection->command_opcode = packet[pos++]; 146 browsing_connection->num_packets = 1; 147 if (avctp_packet_type == AVRCP_START_PACKET){ 148 browsing_connection->num_packets = packet[pos++]; 149 } 150 browsing_connection->pdu_id = packet[pos++]; 151 break; 152 default: 153 break; 154 } 155 switch (avctp_packet_type){ 156 case AVRCP_SINGLE_PACKET: 157 case AVRCP_END_PACKET: 158 switch(browsing_connection->pdu_id){ 159 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 160 printf("\n"); 161 browsing_connection->scope = packet[pos++]; 162 browsing_connection->start_item = big_endian_read_32(packet, pos); 163 pos += 4; 164 browsing_connection->end_item = big_endian_read_32(packet, pos); 165 pos += 4; 166 uint8_t attr_count = packet[pos++]; 167 168 while (attr_count){ 169 uint32_t attr_id = big_endian_read_32(packet, pos); 170 pos += 4; 171 browsing_connection->attr_bitmap |= (1 << attr_id); 172 attr_count--; 173 } 174 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 175 break; 176 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 177 // send total num items 178 browsing_connection->scope = packet[pos++]; 179 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 180 break; 181 } 182 default: 183 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 184 log_info(" not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 185 break; 186 } 187 browsing_connection->state = AVCTP_CONNECTION_OPENED; 188 break; 189 default: 190 break; 191 } 192 break; 193 } 194 195 case HCI_EVENT_PACKET: 196 switch (hci_event_packet_get_type(packet)){ 197 case L2CAP_EVENT_CAN_SEND_NOW: 198 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 199 if (!browsing_connection) break; 200 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 201 browsing_connection->state = AVCTP_CONNECTION_OPENED; 202 avrcp_browsing_target_handle_can_send_now(browsing_connection); 203 break; 204 default: 205 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_target_context); 206 break; 207 } 208 break; 209 210 default: 211 break; 212 } 213 } 214 215 void avrcp_browsing_target_init(void){ 216 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 217 l2cap_register_service(&avrcp_browsing_target_packet_handler, PSM_AVCTP_BROWSING, 0xffff, gap_get_security_level()); 218 } 219 220 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 221 btstack_assert(callback != NULL); 222 avrcp_target_context.browsing_avrcp_callback = callback; 223 } 224 225 uint8_t avrcp_browsing_target_connect(bd_addr_t bd_addr, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){ 226 return avrcp_browsing_connect(bd_addr, AVRCP_TARGET, avrcp_browsing_target_packet_handler, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 227 } 228 229 uint8_t avrcp_browsing_target_disconnect(uint16_t avrcp_browsing_cid){ 230 return avrcp_browsing_disconnect(avrcp_browsing_cid, AVRCP_TARGET); 231 } 232 233 uint8_t avrcp_browsing_target_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config){ 234 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 235 if (!avrcp_connection){ 236 log_error("avrcp_browsing_decline_incoming_connection: could not find a connection."); 237 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 238 } 239 if (!avrcp_connection->browsing_connection){ 240 log_error("avrcp_browsing_decline_incoming_connection: no browsing connection."); 241 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 242 } 243 244 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 245 log_error("avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state."); 246 return ERROR_CODE_COMMAND_DISALLOWED; 247 } 248 249 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 250 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 251 avrcp_connection->browsing_connection->ertm_buffer_size = size; 252 (void)memcpy(&avrcp_connection->browsing_connection->ertm_config, 253 ertm_config, sizeof(l2cap_ertm_config_t)); 254 l2cap_accept_ertm_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid, &avrcp_connection->browsing_connection->ertm_config, avrcp_connection->browsing_connection->ertm_buffer, avrcp_connection->browsing_connection->ertm_buffer_size); 255 return ERROR_CODE_SUCCESS; 256 } 257 258 uint8_t avrcp_browsing_target_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 259 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 260 if (!avrcp_connection){ 261 log_error("avrcp_browsing_decline_incoming_connection: could not find a connection."); 262 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 263 } 264 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 265 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 266 267 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 268 // free connection 269 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 270 avrcp_connection->browsing_connection = NULL; 271 return ERROR_CODE_SUCCESS; 272 } 273 274 uint8_t avrcp_subevent_browsing_get_folder_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint8_t * attr_list, uint16_t attr_list_size){ 275 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 276 if (!avrcp_connection){ 277 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 278 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 279 } 280 281 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 282 if (!connection){ 283 log_info("avrcp_subevent_browsing_get_folder_items_response: could not find a connection."); 284 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 285 } 286 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 287 288 if (connection->state != AVCTP_CONNECTION_OPENED) { 289 log_info("avrcp_subevent_browsing_get_folder_items_response: wrong state."); 290 return ERROR_CODE_COMMAND_DISALLOWED; 291 } 292 int pos = 0; 293 294 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 295 big_endian_store_16(connection->cmd_operands, pos, attr_list_size); 296 pos += 2; 297 298 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 299 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 300 pos += 2; 301 302 // TODO: fragmentation 303 if (attr_list_size > sizeof(connection->cmd_operands)){ 304 connection->attr_list = attr_list; 305 connection->attr_list_size = attr_list_size; 306 log_info(" todo: list too big, invoke fragmentation"); 307 return 1; 308 } 309 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 310 pos += attr_list_size; 311 connection->cmd_operands_length = pos; 312 // printf_hexdump(connection->cmd_operands, connection->cmd_operands_length); 313 314 connection->state = AVCTP_W2_SEND_RESPONSE; 315 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 316 return ERROR_CODE_SUCCESS; 317 } 318 319 320 uint8_t avrcp_subevent_browsing_get_total_num_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint32_t total_num_items){ 321 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 322 if (!avrcp_connection){ 323 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 324 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 325 } 326 327 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 328 if (!connection){ 329 log_info("avrcp_subevent_browsing_get_folder_items_response: could not find a connection."); 330 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 331 } 332 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 333 334 if (connection->state != AVCTP_CONNECTION_OPENED) { 335 log_info("avrcp_subevent_browsing_get_folder_items_response: wrong state."); 336 return ERROR_CODE_COMMAND_DISALLOWED; 337 } 338 339 int pos = 0; 340 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 341 big_endian_store_16(connection->cmd_operands, pos, 7); 342 pos += 2; 343 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 344 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 345 pos += 2; 346 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 347 pos += 4; 348 connection->cmd_operands_length = pos; 349 350 connection->state = AVCTP_W2_SEND_RESPONSE; 351 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 352 return ERROR_CODE_SUCCESS; 353 } 354 355