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