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__ "avdtp_initiator.c" 39 40 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "btstack.h" 47 #include "avdtp.h" 48 #include "avdtp_util.h" 49 #include "avdtp_initiator.h" 50 51 52 static int avdtp_initiator_send_signaling_cmd(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 53 uint8_t command[2]; 54 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 55 command[1] = (uint8_t)identifier; 56 return l2cap_send(cid, command, sizeof(command)); 57 } 58 59 static int avdtp_initiator_send_signaling_cmd_with_seid(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label, uint8_t sep_id){ 60 uint8_t command[3]; 61 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 62 command[1] = (uint8_t)identifier; 63 command[2] = sep_id << 2; 64 return l2cap_send(cid, command, sizeof(command)); 65 } 66 67 void avdtp_initiator_stream_config_subsm(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, int offset, avdtp_context_t * context){ 68 int status = 0; 69 avdtp_stream_endpoint_t * stream_endpoint = NULL; 70 71 uint8_t remote_sep_index; 72 avdtp_sep_t sep; 73 if (connection->initiator_connection_state == AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER) { 74 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE; 75 } else { 76 stream_endpoint = avdtp_stream_endpoint_associated_with_acp_seid(connection->acp_seid, context); 77 if (!stream_endpoint){ 78 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->int_seid, context); 79 } 80 if (!stream_endpoint) return; 81 sep.seid = connection->acp_seid; 82 83 if (stream_endpoint->initiator_config_state != AVDTP_INITIATOR_W4_ANSWER) return; 84 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 85 } 86 87 switch (connection->signaling_packet.message_type){ 88 case AVDTP_RESPONSE_ACCEPT_MSG: 89 switch (connection->signaling_packet.signal_identifier){ 90 case AVDTP_SI_DISCOVER:{ 91 log_info("AVDTP_SI_DISCOVER"); 92 if (connection->signaling_packet.transaction_label != connection->initiator_transaction_label){ 93 log_info(" unexpected transaction label, got %d, expected %d", connection->signaling_packet.transaction_label, connection->initiator_transaction_label); 94 status = BAD_HEADER_FORMAT; 95 break; 96 } 97 98 if (size == 3){ 99 log_info(" ERROR code %02x", packet[offset]); 100 status = packet[offset]; 101 break; 102 } 103 104 int i; 105 for (i = offset; i < size; i += 2){ 106 sep.seid = packet[i] >> 2; 107 offset++; 108 if (sep.seid < 0x01 || sep.seid > 0x3E){ 109 log_info(" invalid sep id"); 110 status = BAD_ACP_SEID; 111 break; 112 } 113 sep.in_use = (packet[i] >> 1) & 0x01; 114 sep.media_type = (avdtp_media_type_t)(packet[i+1] >> 4); 115 sep.type = (avdtp_sep_type_t)((packet[i+1] >> 3) & 0x01); 116 117 if (avdtp_find_remote_sep(connection, sep.seid) == 0xFF){ 118 connection->remote_seps[connection->remote_seps_num++] = sep; 119 } 120 avdtp_signaling_emit_sep(context->avdtp_callback, connection->l2cap_signaling_cid, sep); 121 } 122 break; 123 } 124 125 case AVDTP_SI_GET_CAPABILITIES: 126 case AVDTP_SI_GET_ALL_CAPABILITIES: 127 log_info("AVDTP_SI_GET(_ALL)_CAPABILITIES int %d, acp %d", connection->int_seid, connection->acp_seid); 128 sep.registered_service_categories = avdtp_unpack_service_capabilities(connection, &sep.capabilities, packet+offset, size-offset); 129 if (get_bit16(sep.registered_service_categories, AVDTP_MEDIA_CODEC)){ 130 switch (sep.capabilities.media_codec.media_codec_type){ 131 case AVDTP_CODEC_SBC: 132 avdtp_signaling_emit_media_codec_sbc_capability(context->avdtp_callback, connection->l2cap_signaling_cid, connection->int_seid, connection->acp_seid, sep.capabilities.media_codec); 133 break; 134 default: 135 avdtp_signaling_emit_media_codec_other_capability(context->avdtp_callback, connection->l2cap_signaling_cid, connection->int_seid, connection->acp_seid, sep.capabilities.media_codec); 136 break; 137 } 138 } 139 break; 140 141 case AVDTP_SI_GET_CONFIGURATION: 142 log_info("AVDTP_SI_GET_CONFIGURATION"); 143 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, packet+offset, size-offset); 144 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 145 switch (sep.configuration.media_codec.media_codec_type){ 146 case AVDTP_CODEC_SBC: 147 avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->l2cap_signaling_cid, connection->int_seid, connection->acp_seid, sep.configuration.media_codec); 148 break; 149 default: 150 avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->l2cap_signaling_cid, connection->int_seid, connection->acp_seid, sep.configuration.media_codec); 151 break; 152 } 153 } 154 break; 155 156 case AVDTP_SI_RECONFIGURE: 157 log_info("AVDTP_SI_RECONFIGURE"); 158 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+4, connection->signaling_packet.size-4); 159 // TODO check if configuration is supported 160 161 remote_sep_index = avdtp_find_remote_sep(connection, sep.seid); 162 if (remote_sep_index != 0xFF){ 163 stream_endpoint->remote_sep_index = remote_sep_index; 164 connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 165 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 166 log_info(" INT: update seid %d, to %p", connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 167 } 168 break; 169 170 case AVDTP_SI_SET_CONFIGURATION:{ 171 log_info("AVDTP_SI_SET_CONFIGURATION"); 172 sep.configured_service_categories = stream_endpoint->remote_capabilities_bitmap; 173 sep.configuration = stream_endpoint->remote_capabilities; 174 sep.in_use = 1; 175 // TODO check if configuration is supported 176 177 // find or add sep 178 remote_sep_index = avdtp_find_remote_sep(connection, sep.seid); 179 if (remote_sep_index != 0xFF){ 180 stream_endpoint->remote_sep_index = remote_sep_index; 181 } else { 182 stream_endpoint->remote_sep_index = connection->remote_seps_num; 183 stream_endpoint->connection->remote_seps_num++; 184 } 185 connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 186 log_info(" INT: configured remote seid %d, to %p", connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 187 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 188 break; 189 } 190 191 case AVDTP_SI_OPEN: 192 log_info("AVDTP_SI_OPEN"); 193 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM) { 194 log_error("AVDTP_SI_OPEN in wrong stream endpoint state"); 195 return; 196 } 197 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 198 connection->query_seid = stream_endpoint->sep.seid; 199 l2cap_create_channel(context->packet_handler, connection->remote_addr, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, NULL); 200 return; 201 case AVDTP_SI_START: 202 log_info("AVDTP_SI_START"); 203 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED) { 204 log_error("AVDTP_SI_START in wrong stream endpoint state"); 205 return; 206 } 207 log_info("AVDTP_STREAM_ENDPOINT_STREAMING"); 208 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 209 break; 210 case AVDTP_SI_SUSPEND: 211 log_info("AVDTP_SI_SUSPEND"); 212 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_STREAMING) { 213 log_error("AVDTP_SI_SUSPEND in wrong stream endpoint state"); 214 return; 215 } 216 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 217 break; 218 case AVDTP_SI_CLOSE: 219 log_info("AVDTP_SI_CLOSE"); 220 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 221 break; 222 case AVDTP_SI_ABORT: 223 log_info("AVDTP_SI_ABORT"); 224 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 225 break; 226 default: 227 status = 1; 228 log_info(" AVDTP_RESPONSE_ACCEPT_MSG, signal %d not implemented", connection->signaling_packet.signal_identifier); 229 break; 230 } 231 avdtp_signaling_emit_accept(context->avdtp_callback, connection->l2cap_signaling_cid, 0, connection->signaling_packet.signal_identifier, status); 232 connection->initiator_transaction_label++; 233 break; 234 case AVDTP_RESPONSE_REJECT_MSG: 235 log_info(" AVDTP_RESPONSE_REJECT_MSG signal %d", connection->signaling_packet.signal_identifier); 236 avdtp_signaling_emit_reject(context->avdtp_callback, connection->l2cap_signaling_cid, connection->int_seid, connection->signaling_packet.signal_identifier); 237 return; 238 case AVDTP_GENERAL_REJECT_MSG: 239 log_info(" AVDTP_GENERAL_REJECT_MSG signal %d", connection->signaling_packet.signal_identifier); 240 avdtp_signaling_emit_general_reject(context->avdtp_callback, connection->l2cap_signaling_cid, connection->int_seid, connection->signaling_packet.signal_identifier); 241 return; 242 default: 243 break; 244 } 245 } 246 247 void avdtp_initiator_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_context_t * context){ 248 int sent = 1; 249 switch (connection->initiator_connection_state){ 250 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS: 251 log_info(" INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS"); 252 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 253 avdtp_initiator_send_signaling_cmd(connection->l2cap_signaling_cid, AVDTP_SI_DISCOVER, connection->initiator_transaction_label); 254 break; 255 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES: 256 log_info(" INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES"); 257 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 258 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CAPABILITIES, connection->initiator_transaction_label, connection->acp_seid); 259 break; 260 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES: 261 log_info(" INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES"); 262 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 263 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_ALL_CAPABILITIES, connection->initiator_transaction_label, connection->acp_seid); 264 break; 265 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION: 266 log_info(" INT: AVDTP_INITIATOR_W4_GET_CONFIGURATION"); 267 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 268 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CONFIGURATION, connection->initiator_transaction_label, connection->acp_seid); 269 break; 270 default: 271 sent = 0; 272 break; 273 } 274 275 if (sent) return; 276 sent = 1; 277 278 avdtp_stream_endpoint_t * stream_endpoint = NULL; 279 280 stream_endpoint = avdtp_stream_endpoint_associated_with_acp_seid(connection->acp_seid, context); 281 if (!stream_endpoint){ 282 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->int_seid, context); 283 } 284 if (!stream_endpoint) return; 285 286 avdtp_initiator_stream_endpoint_state_t stream_endpoint_state = stream_endpoint->initiator_config_state; 287 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 288 289 if (stream_endpoint->start_stream){ 290 stream_endpoint->start_stream = 0; 291 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_OPENED){ 292 connection->int_seid = stream_endpoint->sep.seid; 293 connection->acp_seid = connection->remote_seps[stream_endpoint->remote_sep_index].seid; 294 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_START, connection->initiator_transaction_label++, connection->acp_seid); 295 return; 296 } 297 return; 298 } 299 300 if (stream_endpoint->stop_stream){ 301 stream_endpoint->stop_stream = 0; 302 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED){ 303 connection->int_seid = stream_endpoint->sep.seid; 304 connection->acp_seid = connection->remote_seps[stream_endpoint->remote_sep_index].seid; 305 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->initiator_transaction_label++, connection->acp_seid); 306 return; 307 } 308 } 309 310 if (stream_endpoint->abort_stream){ 311 stream_endpoint->abort_stream = 0; 312 switch (stream_endpoint->state){ 313 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 314 case AVDTP_STREAM_ENDPOINT_CLOSING: 315 case AVDTP_STREAM_ENDPOINT_OPENED: 316 case AVDTP_STREAM_ENDPOINT_STREAMING: 317 connection->int_seid = stream_endpoint->sep.seid; 318 connection->acp_seid = connection->remote_seps[stream_endpoint->remote_sep_index].seid; 319 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 320 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->initiator_transaction_label++, connection->acp_seid); 321 return; 322 default: 323 break; 324 } 325 } 326 327 if (stream_endpoint->suspend_stream){ 328 stream_endpoint->suspend_stream = 0; 329 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 330 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 331 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_SUSPEND, connection->initiator_transaction_label, connection->acp_seid); 332 return; 333 } 334 } 335 336 if (stream_endpoint->send_stream){ 337 stream_endpoint->send_stream = 0; 338 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 339 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 340 avdtp_streaming_emit_can_send_media_packet_now(context->avdtp_callback, stream_endpoint->l2cap_media_cid, stream_endpoint->sep.seid, stream_endpoint->sequence_number); 341 return; 342 } 343 } 344 345 346 switch (stream_endpoint_state){ 347 case AVDTP_INITIATOR_W2_SET_CONFIGURATION: 348 case AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID:{ 349 log_info(" INT: AVDTP_INITIATOR_W2_(RE)CONFIGURATION bitmap, int seid %d, acp seid %d", connection->int_seid, connection->acp_seid); 350 // log_info_hexdump( connection->remote_capabilities.media_codec.media_codec_information, connection->remote_capabilities.media_codec.media_codec_information_len); 351 connection->signaling_packet.acp_seid = connection->acp_seid; 352 connection->signaling_packet.int_seid = connection->int_seid; 353 354 connection->signaling_packet.signal_identifier = AVDTP_SI_SET_CONFIGURATION; 355 356 if (stream_endpoint_state == AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID){ 357 connection->signaling_packet.signal_identifier = AVDTP_SI_RECONFIGURE; 358 } 359 360 avdtp_prepare_capabilities(&connection->signaling_packet, connection->initiator_transaction_label, stream_endpoint->remote_capabilities_bitmap, stream_endpoint->remote_capabilities, connection->signaling_packet.signal_identifier); 361 l2cap_reserve_packet_buffer(); 362 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 363 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer); 364 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 365 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 366 log_info(" INT: fragmented"); 367 } 368 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 369 break; 370 } 371 case AVDTP_INITIATOR_FRAGMENTATED_COMMAND:{ 372 l2cap_reserve_packet_buffer(); 373 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 374 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer); 375 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 376 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 377 log_info(" INT: fragmented"); 378 } 379 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 380 break; 381 } 382 case AVDTP_INITIATOR_W2_OPEN_STREAM: 383 switch (stream_endpoint->state){ 384 case AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM: 385 log_info(" INT: AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM"); 386 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_OPEN, connection->initiator_transaction_label, connection->acp_seid); 387 break; 388 default: 389 sent = 0; 390 break; 391 } 392 break; 393 default: 394 sent = 0; 395 break; 396 } 397 398 // check fragmentation 399 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 400 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 401 } 402 } 403