1 /* 2 * Copyright (C) 2014 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__ "pb_adv.c" 39 40 #include "pb_adv.h" 41 42 #include <stdint.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "btstack_util.h" 50 51 #include "mesh/adv_bearer.h" 52 #include "mesh/beacon.h" 53 #include "mesh/mesh_node.h" 54 #include "mesh/provisioning.h" 55 56 #define PB_ADV_LINK_OPEN_RETRANSMIT_MS 1000 57 58 static void pb_adv_run(void); 59 60 /* taps: 32 31 29 1; characteristic polynomial: x^32 + x^31 + x^29 + x + 1 */ 61 #define LFSR(a) ((a >> 1) ^ (uint32_t)((0 - (a & 1u)) & 0xd0000001u)) 62 63 // PB-ADV - Provisioning Bearer using Advertisement Bearer 64 65 #define MESH_GENERIC_PROVISIONING_LINK_OPEN 0x00 66 #define MESH_GENERIC_PROVISIONING_LINK_ACK 0x01 67 #define MESH_GENERIC_PROVISIONING_LINK_CLOSE 0x02 68 69 #define MESH_GENERIC_PROVISIONING_TRANSACTION_TIMEOUT_MS 30000 70 71 #define MESH_PB_ADV_MAX_PDU_SIZE 100 72 #define MESH_PB_ADV_MAX_SEGMENTS 8 73 #define MESH_PB_ADV_START_PAYLOAD 20 74 #define MESH_PB_ADV_CONT_PAYLOAD 23 75 76 typedef enum mesh_gpcf_format { 77 MESH_GPCF_TRANSACTION_START = 0, 78 MESH_GPCF_TRANSACTION_ACK, 79 MESH_GPCF_TRANSACTION_CONT, 80 MESH_GPCF_PROV_BEARER_CONTROL, 81 } mesh_gpcf_format_t; 82 83 typedef enum { 84 LINK_STATE_W4_OPEN, 85 LINK_STATE_W2_SEND_ACK, 86 LINK_STATE_W4_ACK, 87 LINK_STATE_OPEN, 88 LINK_STATE_CLOSING, 89 } link_state_t; 90 static link_state_t link_state; 91 92 #ifdef ENABLE_MESH_PROVISIONER 93 static const uint8_t * pb_adv_peer_device_uuid; 94 #endif 95 96 static uint8_t pb_adv_msg_in_buffer[MESH_PB_ADV_MAX_PDU_SIZE]; // TODO: how large are prov messages? 97 98 // single adv link 99 static uint16_t pb_adv_cid = 1; 100 static uint8_t pb_adv_provisioner_role; 101 102 // link state 103 static uint32_t pb_adv_link_id; 104 static uint8_t pb_adv_link_close_reason; 105 static uint8_t pb_adv_link_close_countdown; 106 107 // random delay for outgoing packets 108 static uint32_t pb_adv_lfsr; 109 static uint8_t pb_adv_random_delay_active; 110 static btstack_timer_source_t pb_adv_random_delay_timer; 111 112 // incoming message 113 static uint8_t pb_adv_msg_in_transaction_nr_prev; 114 static uint16_t pb_adv_msg_in_len; // 115 static uint8_t pb_adv_msg_in_fcs; 116 static uint8_t pb_adv_msg_in_last_segment; 117 static uint8_t pb_adv_msg_in_segments_missing; // bitfield for segmentes 1-n 118 static uint8_t pb_adv_msg_in_transaction_nr; 119 static uint8_t pb_adv_msg_in_send_ack; 120 121 // oputgoing message 122 static uint8_t pb_adv_msg_out_active; 123 static uint8_t pb_adv_msg_out_transaction_nr; 124 static uint8_t pb_adv_msg_out_completed_transaction_nr; 125 static uint16_t pb_adv_msg_out_len; 126 static uint16_t pb_adv_msg_out_pos; 127 static uint8_t pb_adv_msg_out_seg; 128 static uint32_t pb_adv_msg_out_start; 129 static const uint8_t * pb_adv_msg_out_buffer; 130 131 static btstack_packet_handler_t pb_adv_packet_handler; 132 133 // poor man's random number generator 134 static uint32_t pb_adv_random(void){ 135 pb_adv_lfsr = LFSR(pb_adv_lfsr); 136 return pb_adv_lfsr; 137 } 138 139 static void pb_adv_emit_pdu_sent(uint8_t status){ 140 uint8_t event[] = { HCI_EVENT_MESH_META, 2, MESH_SUBEVENT_PB_TRANSPORT_PDU_SENT, status}; 141 pb_adv_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 142 } 143 144 static void pb_adv_emit_link_open(uint8_t status, uint16_t the_pb_adv_cid){ 145 uint8_t event[7] = { HCI_EVENT_MESH_META, 5, MESH_SUBEVENT_PB_TRANSPORT_LINK_OPEN, status}; 146 little_endian_store_16(event, 4, the_pb_adv_cid); 147 event[6] = PB_TYPE_ADV; 148 pb_adv_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 149 } 150 151 static void pb_adv_emit_link_close(uint16_t the_pb_adv_cid, uint8_t reason){ 152 uint8_t event[5] = { HCI_EVENT_MESH_META, 3, MESH_SUBEVENT_PB_TRANSPORT_LINK_CLOSED}; 153 little_endian_store_16(event, 4, the_pb_adv_cid); 154 pb_adv_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 155 } 156 157 static void pb_adv_handle_bearer_control(uint32_t link_id, uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 158 uint8_t bearer_opcode = pdu[0] >> 2; 159 uint8_t reason; 160 const uint8_t * own_device_uuid; 161 switch (bearer_opcode){ 162 case MESH_GENERIC_PROVISIONING_LINK_OPEN: // Open a session on a bearer with a device 163 // does it match our device_uuid? 164 own_device_uuid = mesh_node_get_device_uuid(); 165 if (!own_device_uuid) break; 166 if (memcmp(&pdu[1], own_device_uuid, 16) != 0) break; 167 switch(link_state){ 168 case LINK_STATE_W4_OPEN: 169 pb_adv_link_id = link_id; 170 pb_adv_provisioner_role = 0; 171 pb_adv_msg_in_transaction_nr = 0xff; // first transaction nr will be 0x00 172 pb_adv_msg_in_transaction_nr_prev = 0xff; 173 log_info("link open, id %08x", pb_adv_link_id); 174 printf("PB-ADV: Link Open %08x\n", pb_adv_link_id); 175 link_state = LINK_STATE_W2_SEND_ACK; 176 adv_bearer_request_can_send_now_for_provisioning_pdu(); 177 pb_adv_emit_link_open(0, pb_adv_cid); 178 break; 179 case LINK_STATE_OPEN: 180 if (pb_adv_link_id != link_id) break; 181 log_info("link open, resend ACK"); 182 link_state = LINK_STATE_W2_SEND_ACK; 183 adv_bearer_request_can_send_now_for_provisioning_pdu(); 184 break; 185 default: 186 break; 187 } 188 break; 189 #ifdef ENABLE_MESH_PROVISIONER 190 case MESH_GENERIC_PROVISIONING_LINK_ACK: // Acknowledge a session on a bearer 191 if (link_state != LINK_STATE_W4_ACK) break; 192 link_state = LINK_STATE_OPEN; 193 pb_adv_msg_out_transaction_nr = 0; 194 pb_adv_msg_in_transaction_nr = 0x7f; // first transaction nr will be 0x80 195 pb_adv_msg_in_transaction_nr_prev = 0x7f; 196 btstack_run_loop_remove_timer(&pb_adv_random_delay_timer); 197 log_info("link open, id %08x", pb_adv_link_id); 198 printf("PB-ADV: Link Open %08x\n", pb_adv_link_id); 199 pb_adv_emit_link_open(0, pb_adv_cid); 200 break; 201 #endif 202 case MESH_GENERIC_PROVISIONING_LINK_CLOSE: // Close a session on a bearer 203 // does it match link id 204 if (link_id != pb_adv_link_id) break; 205 reason = pdu[1]; 206 link_state = LINK_STATE_W4_OPEN; 207 log_info("link close, reason %x", reason); 208 pb_adv_emit_link_close(pb_adv_cid, reason); 209 break; 210 default: 211 log_info("BearerOpcode %x reserved for future use\n", bearer_opcode); 212 break; 213 } 214 } 215 216 static void pb_adv_pdu_complete(void){ 217 218 // Verify FCS 219 uint8_t pdu_crc = btstack_crc8_calc((uint8_t*)pb_adv_msg_in_buffer, pb_adv_msg_in_len); 220 if (pdu_crc != pb_adv_msg_in_fcs){ 221 printf("Incoming PDU: fcs %02x, calculated %02x -> drop packet\n", pb_adv_msg_in_fcs, btstack_crc8_calc(pb_adv_msg_in_buffer, pb_adv_msg_in_len)); 222 return; 223 } 224 225 printf("PB-ADV: %02x complete\n", pb_adv_msg_in_transaction_nr); 226 227 // transaction complete 228 pb_adv_msg_in_transaction_nr_prev = pb_adv_msg_in_transaction_nr; 229 if (pb_adv_provisioner_role){ 230 pb_adv_msg_in_transaction_nr = 0x7f; // invalid 231 } else { 232 pb_adv_msg_in_transaction_nr = 0xff; // invalid 233 } 234 235 // Ack Transaction 236 pb_adv_msg_in_send_ack = 1; 237 pb_adv_run(); 238 239 // Forward to Provisioning 240 pb_adv_packet_handler(PROVISIONING_DATA_PACKET, 0, pb_adv_msg_in_buffer, pb_adv_msg_in_len); 241 } 242 243 static void pb_adv_handle_transaction_start(uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 244 245 // resend ack if packet from previous transaction received 246 if (transaction_nr != 0xff && transaction_nr == pb_adv_msg_in_transaction_nr_prev){ 247 printf("PB_ADV: %02x transaction complete, resending ack \n", transaction_nr); 248 pb_adv_msg_in_send_ack = 1; 249 return; 250 } 251 252 // new transaction? 253 if (transaction_nr != pb_adv_msg_in_transaction_nr){ 254 255 // check len 256 uint16_t msg_len = big_endian_read_16(pdu, 1); 257 if (msg_len > MESH_PB_ADV_MAX_PDU_SIZE){ 258 // abort transaction 259 return; 260 } 261 262 // check num segments 263 uint8_t last_segment = pdu[0] >> 2; 264 if (last_segment >= MESH_PB_ADV_MAX_SEGMENTS){ 265 // abort transaction 266 return; 267 } 268 269 printf("PB-ADV: %02x started\n", transaction_nr); 270 271 pb_adv_msg_in_transaction_nr = transaction_nr; 272 pb_adv_msg_in_len = msg_len; 273 pb_adv_msg_in_fcs = pdu[3]; 274 pb_adv_msg_in_last_segment = last_segment; 275 276 // set bits for segments 1..n (segment 0 already received in this message) 277 pb_adv_msg_in_segments_missing = (1 << last_segment) - 1; 278 279 // store payload 280 uint16_t payload_len = size - 4; 281 memcpy(pb_adv_msg_in_buffer, &pdu[4], payload_len); 282 283 // complete? 284 if (pb_adv_msg_in_segments_missing == 0){ 285 pb_adv_pdu_complete(); 286 } 287 } 288 } 289 290 static void pb_adv_handle_transaction_cont(uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 291 292 // check transaction nr 293 if (transaction_nr != 0xff && transaction_nr == pb_adv_msg_in_transaction_nr_prev){ 294 printf("PB_ADV: %02x transaction complete, resending resending ack\n", transaction_nr); 295 pb_adv_msg_in_send_ack = 1; 296 return; 297 } 298 299 if (transaction_nr != pb_adv_msg_in_transaction_nr){ 300 printf("PB-ADV: %02x received msg for transaction nr %x\n", pb_adv_msg_in_transaction_nr, transaction_nr); 301 return; 302 } 303 304 // validate seg nr 305 uint8_t seg = pdu[0] >> 2; 306 if (seg >= MESH_PB_ADV_MAX_SEGMENTS || seg == 0){ 307 return; 308 } 309 310 // check if segment already received 311 uint8_t seg_mask = 1 << (seg-1); 312 if ((pb_adv_msg_in_segments_missing & seg_mask) == 0){ 313 printf("PB-ADV: %02x, segment %u already received\n", transaction_nr, seg); 314 return; 315 } 316 printf("PB-ADV: %02x, segment %u stored\n", transaction_nr, seg); 317 318 // calculate offset and fragment size 319 uint16_t msg_pos = MESH_PB_ADV_START_PAYLOAD + (seg-1) * MESH_PB_ADV_CONT_PAYLOAD; 320 uint16_t fragment_size = size - 1; 321 322 // check size if last segment 323 if (seg == pb_adv_msg_in_last_segment && (msg_pos + fragment_size) != pb_adv_msg_in_len){ 324 // last segment has invalid size 325 return; 326 } 327 328 // store segment and mark as received 329 memcpy(&pb_adv_msg_in_buffer[msg_pos], &pdu[1], fragment_size); 330 pb_adv_msg_in_segments_missing &= ~seg_mask; 331 332 // last segment 333 if (pb_adv_msg_in_segments_missing == 0){ 334 pb_adv_pdu_complete(); 335 } 336 } 337 338 static void pb_adv_outgoing_transation_complete(uint8_t status){ 339 // stop sending 340 pb_adv_msg_out_active = 0; 341 // emit done 342 pb_adv_emit_pdu_sent(status); 343 // keep track of ack'ed transactions 344 pb_adv_msg_out_completed_transaction_nr = pb_adv_msg_out_transaction_nr; 345 // increment outgoing transaction nr 346 pb_adv_msg_out_transaction_nr++; 347 if (pb_adv_msg_out_transaction_nr == 0x00){ 348 // Device role 349 pb_adv_msg_out_transaction_nr = 0x80; 350 } 351 if (pb_adv_msg_out_transaction_nr == 0x80){ 352 // Provisioner role 353 pb_adv_msg_out_transaction_nr = 0x00; 354 } 355 } 356 357 static void pb_adv_handle_transaction_ack(uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 358 if (transaction_nr == pb_adv_msg_out_transaction_nr){ 359 printf("PB-ADV: %02x ACK received\n", transaction_nr); 360 pb_adv_outgoing_transation_complete(ERROR_CODE_SUCCESS); 361 } else if (transaction_nr == pb_adv_msg_out_completed_transaction_nr){ 362 // Transaction ack received again 363 } else { 364 printf("PB-ADV: %02x unexpected Transaction ACK %x recevied\n", pb_adv_msg_out_transaction_nr, transaction_nr); 365 } 366 } 367 368 static int pb_adv_packet_to_send(void){ 369 return pb_adv_msg_in_send_ack || pb_adv_msg_out_active || (link_state == LINK_STATE_W4_ACK); 370 } 371 372 static void pb_adv_timer_handler(btstack_timer_source_t * ts){ 373 UNUSED(ts); 374 pb_adv_random_delay_active = 0; 375 if (!pb_adv_packet_to_send()) return; 376 adv_bearer_request_can_send_now_for_provisioning_pdu(); 377 } 378 379 static void pb_adv_run(void){ 380 if (!pb_adv_packet_to_send()) return; 381 if (pb_adv_random_delay_active) return; 382 383 // spec recommends 20-50 ms, we use 20-51 ms 384 pb_adv_random_delay_active = 1; 385 uint16_t random_delay_ms = 20 + (pb_adv_random() & 0x1f); 386 log_info("random delay %u ms", random_delay_ms); 387 btstack_run_loop_set_timer_handler(&pb_adv_random_delay_timer, &pb_adv_timer_handler); 388 btstack_run_loop_set_timer(&pb_adv_random_delay_timer, random_delay_ms); 389 btstack_run_loop_add_timer(&pb_adv_random_delay_timer); 390 } 391 392 static void pb_adv_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 393 UNUSED(channel); 394 395 if (packet_type != HCI_EVENT_PACKET) return; 396 const uint8_t * data; 397 uint8_t length; 398 uint32_t link_id; 399 uint8_t transaction_nr; 400 uint8_t generic_provisioning_control; 401 switch(packet[0]){ 402 case GAP_EVENT_ADVERTISING_REPORT: 403 404 data = gap_event_advertising_report_get_data(packet); 405 // PDB ADV PDU 406 length = data[0]; 407 link_id = big_endian_read_32(data, 2); 408 transaction_nr = data[6]; 409 // generic provision PDU 410 generic_provisioning_control = data[7]; 411 mesh_gpcf_format_t generic_provisioning_control_format = (mesh_gpcf_format_t) generic_provisioning_control & 3; 412 413 // unless, we're waiting for LINK_OPEN, check link_id 414 if (link_state != LINK_STATE_W4_OPEN){ 415 if (link_id != pb_adv_link_id) break; 416 } 417 418 if (generic_provisioning_control_format == MESH_GPCF_PROV_BEARER_CONTROL){ 419 pb_adv_handle_bearer_control(link_id, transaction_nr, &data[7], length-6); 420 break; 421 } 422 423 // verify link id and link state 424 if (link_state != LINK_STATE_OPEN) break; 425 426 switch (generic_provisioning_control_format){ 427 case MESH_GPCF_TRANSACTION_START: 428 pb_adv_handle_transaction_start(transaction_nr, &data[7], length-6); 429 break; 430 case MESH_GPCF_TRANSACTION_CONT: 431 pb_adv_handle_transaction_cont(transaction_nr, &data[7], length-6); 432 break; 433 case MESH_GPCF_TRANSACTION_ACK: 434 pb_adv_handle_transaction_ack(transaction_nr, &data[7], length-6); 435 break; 436 default: 437 break; 438 } 439 pb_adv_run(); 440 break; 441 case HCI_EVENT_MESH_META: 442 switch(packet[2]){ 443 case MESH_SUBEVENT_CAN_SEND_NOW: 444 if (link_state == LINK_STATE_W4_ACK){ 445 // build packet 446 uint8_t buffer[22]; 447 big_endian_store_32(buffer, 0, pb_adv_link_id); 448 buffer[4] = 0; // Transaction ID = 0 449 buffer[5] = (0 << 2) | 3; // Link Open | Provisioning Bearer Control 450 memcpy(&buffer[6], pb_adv_peer_device_uuid, 16); 451 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 452 log_info("link open %08x", pb_adv_link_id); 453 printf("PB-ADV: Sending Link Open for device uuid: "); 454 printf_hexdump(pb_adv_peer_device_uuid, 16); 455 btstack_run_loop_set_timer_handler(&pb_adv_random_delay_timer, &pb_adv_timer_handler); 456 btstack_run_loop_set_timer(&pb_adv_random_delay_timer, PB_ADV_LINK_OPEN_RETRANSMIT_MS); 457 btstack_run_loop_add_timer(&pb_adv_random_delay_timer); 458 break; 459 } 460 if (link_state == LINK_STATE_CLOSING){ 461 log_info("link close %08x", pb_adv_link_id); 462 printf("PB-ADV: Sending Link Close\n"); 463 // build packet 464 uint8_t buffer[7]; 465 big_endian_store_32(buffer, 0, pb_adv_link_id); 466 buffer[4] = 0; // Transaction ID = 0 467 buffer[5] = (2 << 2) | 3; // Link Close | Provisioning Bearer Control 468 buffer[6] = pb_adv_link_close_reason; 469 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 470 pb_adv_link_close_countdown--; 471 if (pb_adv_link_close_countdown) { 472 adv_bearer_request_can_send_now_for_provisioning_pdu(); 473 } else { 474 link_state = LINK_STATE_W4_OPEN; 475 } 476 break; 477 } 478 if (link_state == LINK_STATE_W2_SEND_ACK){ 479 link_state = LINK_STATE_OPEN; 480 pb_adv_msg_out_transaction_nr = 0x80; 481 // build packet 482 uint8_t buffer[6]; 483 big_endian_store_32(buffer, 0, pb_adv_link_id); 484 buffer[4] = 0; 485 buffer[5] = (1 << 2) | 3; // Link Ack | Provisioning Bearer Control 486 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 487 log_info("link ack %08x", pb_adv_link_id); 488 printf("PB-ADV: Sending Link Open Ack\n"); 489 break; 490 } 491 if (pb_adv_msg_in_send_ack){ 492 pb_adv_msg_in_send_ack = 0; 493 uint8_t buffer[6]; 494 big_endian_store_32(buffer, 0, pb_adv_link_id); 495 buffer[4] = pb_adv_msg_in_transaction_nr_prev; 496 buffer[5] = MESH_GPCF_TRANSACTION_ACK; 497 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 498 log_info("transaction ack %08x", pb_adv_link_id); 499 printf("PB-ADV: %02x sending ACK\n", pb_adv_msg_in_transaction_nr_prev); 500 pb_adv_run(); 501 break; 502 } 503 if (pb_adv_msg_out_active){ 504 505 // check timeout for outgoing message 506 // since uint32_t is used and time now must be greater than pb_adv_msg_out_start, 507 // this claculation is correct even when the run loop time overruns 508 uint32_t transaction_time_ms = btstack_run_loop_get_time_ms() - pb_adv_msg_out_start; 509 if (transaction_time_ms >= MESH_GENERIC_PROVISIONING_TRANSACTION_TIMEOUT_MS){ 510 pb_adv_outgoing_transation_complete(ERROR_CODE_CONNECTION_TIMEOUT); 511 return; 512 } 513 514 uint8_t buffer[29]; // ADV MTU 515 big_endian_store_32(buffer, 0, pb_adv_link_id); 516 buffer[4] = pb_adv_msg_out_transaction_nr; 517 uint16_t bytes_left; 518 uint16_t pos; 519 if (pb_adv_msg_out_pos == 0){ 520 // Transaction start 521 int seg_n = pb_adv_msg_out_len / 24; 522 pb_adv_msg_out_seg = 0; 523 buffer[5] = seg_n << 2 | MESH_GPCF_TRANSACTION_START; 524 big_endian_store_16(buffer, 6, pb_adv_msg_out_len); 525 buffer[8] = btstack_crc8_calc((uint8_t*)pb_adv_msg_out_buffer, pb_adv_msg_out_len); 526 pos = 9; 527 bytes_left = 24 - 4; 528 printf("PB-ADV: %02x Sending Start: ", pb_adv_msg_out_transaction_nr); 529 } else { 530 // Transaction continue 531 buffer[5] = pb_adv_msg_out_seg << 2 | MESH_GPCF_TRANSACTION_CONT; 532 pos = 6; 533 bytes_left = 24 - 1; 534 printf("PB-ADV: %02x Sending Cont: ", pb_adv_msg_out_transaction_nr); 535 } 536 pb_adv_msg_out_seg++; 537 uint16_t bytes_to_copy = btstack_min(bytes_left, pb_adv_msg_out_len - pb_adv_msg_out_pos); 538 memcpy(&buffer[pos], &pb_adv_msg_out_buffer[pb_adv_msg_out_pos], bytes_to_copy); 539 pos += bytes_to_copy; 540 printf("bytes %02u, pos %02u, len %02u: ", bytes_to_copy, pb_adv_msg_out_pos, pb_adv_msg_out_len); 541 printf_hexdump(buffer, pos); 542 pb_adv_msg_out_pos += bytes_to_copy; 543 544 if (pb_adv_msg_out_pos == pb_adv_msg_out_len){ 545 // done 546 pb_adv_msg_out_pos = 0; 547 } 548 adv_bearer_send_provisioning_pdu(buffer, pos); 549 pb_adv_run(); 550 break; 551 } 552 break; 553 default: 554 break; 555 } 556 default: 557 break; 558 } 559 } 560 561 void pb_adv_init(void){ 562 adv_bearer_register_for_provisioning_pdu(&pb_adv_handler); 563 pb_adv_lfsr = 0x12345678; 564 pb_adv_random(); 565 } 566 567 void pb_adv_register_packet_handler(btstack_packet_handler_t packet_handler){ 568 pb_adv_packet_handler = packet_handler; 569 } 570 571 void pb_adv_send_pdu(uint16_t the_pb_adv_cid, const uint8_t * pdu, uint16_t size){ 572 UNUSED(the_pb_adv_cid); 573 printf("PB-ADV: Send packet "); 574 printf_hexdump(pdu, size); 575 pb_adv_msg_out_buffer = pdu; 576 pb_adv_msg_out_len = size; 577 pb_adv_msg_out_pos = 0; 578 pb_adv_msg_out_start = btstack_run_loop_get_time_ms(); 579 pb_adv_msg_out_active = 1; 580 pb_adv_run(); 581 } 582 583 /** 584 * Close Link 585 * @param the_pb_adv_cid 586 */ 587 void pb_adv_close_link(uint16_t the_pb_adv_cid, uint8_t reason){ 588 switch (link_state){ 589 case LINK_STATE_W4_ACK: 590 case LINK_STATE_OPEN: 591 case LINK_STATE_W2_SEND_ACK: 592 pb_adv_emit_link_close(the_pb_adv_cid, 0); 593 link_state = LINK_STATE_CLOSING; 594 pb_adv_link_close_countdown = 3; 595 pb_adv_link_close_reason = reason; 596 adv_bearer_request_can_send_now_for_provisioning_pdu(); 597 break; 598 case LINK_STATE_W4_OPEN: 599 case LINK_STATE_CLOSING: 600 // nothing to do 601 break; 602 } 603 } 604 605 #ifdef ENABLE_MESH_PROVISIONER 606 uint16_t pb_adv_create_link(const uint8_t * device_uuid){ 607 if (link_state != LINK_STATE_W4_OPEN) return 0; 608 609 pb_adv_peer_device_uuid = device_uuid; 610 pb_adv_provisioner_role = 1; 611 612 // create new 32-bit link id 613 pb_adv_link_id = pb_adv_random(); 614 615 // after sending OPEN, we wait for an ACK 616 link_state = LINK_STATE_W4_ACK; 617 618 // request outgoing 619 adv_bearer_request_can_send_now_for_provisioning_pdu(); 620 621 // dummy pb_adv_cid 622 return pb_adv_cid; 623 } 624 #endif 625 626