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_browsing.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 54 // l2cap_reserve_packet_buffer(); 55 // uint8_t * packet = l2cap_get_outgoing_buffer(); 56 uint8_t packet[300]; 57 connection->packet_type = AVRCP_SINGLE_PACKET; 58 59 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 60 // Profile IDentifier (PID) 61 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 62 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 63 (void)memcpy(packet + pos, connection->cmd_operands, 64 connection->cmd_operands_length); 65 66 pos += connection->cmd_operands_length; 67 connection->wait_to_send = false; 68 // return l2cap_send_prepared(connection->l2cap_browsing_cid, pos); 69 return l2cap_send(connection->l2cap_browsing_cid, packet, pos); 70 } 71 72 73 static uint8_t avrcp_browsing_target_response_general_reject(avrcp_browsing_connection_t * connection, avrcp_status_code_t status){ 74 // AVRCP_CTYPE_RESPONSE_REJECTED 75 int pos = 0; 76 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 77 // connection->cmd_operands[pos++] = 0; 78 // param length 79 big_endian_store_16(connection->cmd_operands, pos, 1); 80 pos += 2; 81 connection->cmd_operands[pos++] = status; 82 connection->cmd_operands_length = 4; 83 connection->state = AVCTP_W2_SEND_RESPONSE; 84 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 85 return ERROR_CODE_SUCCESS; 86 } 87 88 static void avrcp_browsing_target_emit_get_folder_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 89 btstack_assert(callback != NULL); 90 91 uint8_t event[10]; 92 int pos = 0; 93 event[pos++] = HCI_EVENT_AVRCP_META; 94 event[pos++] = sizeof(event) - 2; 95 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_FOLDER_ITEMS; 96 little_endian_store_16(event, pos, browsing_cid); 97 pos += 2; 98 event[pos++] = connection->scope; 99 big_endian_store_32(event, pos, connection->attr_bitmap); 100 pos += 4; 101 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 102 } 103 104 static void avrcp_browsing_target_emit_get_total_num_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 105 btstack_assert(callback != NULL); 106 107 uint8_t event[10]; 108 int pos = 0; 109 event[pos++] = HCI_EVENT_AVRCP_META; 110 event[pos++] = sizeof(event) - 2; 111 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_TOTAL_NUM_ITEMS; 112 little_endian_store_16(event, pos, browsing_cid); 113 pos += 2; 114 event[pos++] = connection->scope; 115 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 116 } 117 118 119 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 120 UNUSED(size); 121 avrcp_browsing_connection_t * browsing_connection; 122 123 switch (packet_type) { 124 case L2CAP_DATA_PACKET:{ 125 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 126 if (!browsing_connection) break; 127 int pos = 0; 128 uint8_t transport_header = packet[pos++]; 129 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 130 browsing_connection->transaction_label = transport_header >> 4; 131 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 132 switch (avctp_packet_type){ 133 case AVRCP_SINGLE_PACKET: 134 case AVRCP_START_PACKET: 135 browsing_connection->subunit_type = packet[pos++] >> 2; 136 browsing_connection->subunit_id = 0; 137 browsing_connection->command_opcode = packet[pos++]; 138 browsing_connection->num_packets = 1; 139 if (avctp_packet_type == AVRCP_START_PACKET){ 140 browsing_connection->num_packets = packet[pos++]; 141 } 142 browsing_connection->pdu_id = packet[pos++]; 143 break; 144 default: 145 break; 146 } 147 switch (avctp_packet_type){ 148 case AVRCP_SINGLE_PACKET: 149 case AVRCP_END_PACKET: 150 switch(browsing_connection->pdu_id){ 151 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 152 printf("\n"); 153 browsing_connection->scope = packet[pos++]; 154 browsing_connection->start_item = big_endian_read_32(packet, pos); 155 pos += 4; 156 browsing_connection->end_item = big_endian_read_32(packet, pos); 157 pos += 4; 158 uint8_t attr_count = packet[pos++]; 159 160 while (attr_count){ 161 uint32_t attr_id = big_endian_read_32(packet, pos); 162 pos += 4; 163 browsing_connection->attr_bitmap |= (1 << attr_id); 164 attr_count--; 165 } 166 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 167 break; 168 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 169 // send total num items 170 browsing_connection->scope = packet[pos++]; 171 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 172 break; 173 } 174 default: 175 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 176 log_info("not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 177 break; 178 } 179 browsing_connection->state = AVCTP_CONNECTION_OPENED; 180 break; 181 default: 182 break; 183 } 184 break; 185 } 186 187 case HCI_EVENT_PACKET: 188 switch (hci_event_packet_get_type(packet)){ 189 case L2CAP_EVENT_CAN_SEND_NOW: 190 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 191 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 192 browsing_connection->state = AVCTP_CONNECTION_OPENED; 193 avrcp_browsing_target_handle_can_send_now(browsing_connection); 194 break; 195 default: 196 break; 197 } 198 break; 199 200 default: 201 break; 202 } 203 } 204 205 void avrcp_browsing_target_init(void){ 206 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 207 avrcp_browsing_register_target_packet_handler(avrcp_browsing_target_packet_handler); 208 } 209 210 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 211 btstack_assert(callback != NULL); 212 avrcp_target_context.browsing_avrcp_callback = callback; 213 } 214 215 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){ 216 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 217 if (!avrcp_connection){ 218 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 219 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 220 } 221 222 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 223 if (!connection){ 224 log_info("Could not find a browsing connection."); 225 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 226 } 227 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 228 229 // TODO: handle response to SetAddressedPlayer 230 231 uint16_t pos = 0; 232 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 233 big_endian_store_16(connection->cmd_operands, pos, attr_list_size); 234 pos += 2; 235 236 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 237 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 238 pos += 2; 239 240 // TODO: fragmentation 241 if (attr_list_size > sizeof(connection->cmd_operands)){ 242 connection->attr_list = attr_list; 243 connection->attr_list_size = attr_list_size; 244 log_info(" todo: list too big, invoke fragmentation"); 245 return 1; 246 } 247 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 248 pos += attr_list_size; 249 connection->cmd_operands_length = pos; 250 // printf_hexdump(connection->cmd_operands, connection->cmd_operands_length); 251 252 connection->state = AVCTP_W2_SEND_RESPONSE; 253 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 254 return ERROR_CODE_SUCCESS; 255 } 256 257 258 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){ 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("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 262 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 263 } 264 265 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 266 if (!connection){ 267 log_info("Could not find a browsing connection."); 268 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 269 } 270 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 271 272 if (connection->state != AVCTP_CONNECTION_OPENED) { 273 log_info("Browsing connection wrong state."); 274 return ERROR_CODE_COMMAND_DISALLOWED; 275 } 276 277 int pos = 0; 278 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 279 big_endian_store_16(connection->cmd_operands, pos, 7); 280 pos += 2; 281 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 282 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 283 pos += 2; 284 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 285 pos += 4; 286 connection->cmd_operands_length = pos; 287 288 connection->state = AVCTP_W2_SEND_RESPONSE; 289 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 290 return ERROR_CODE_SUCCESS; 291 } 292 293