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 pb_transport_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, pb_transport_cid); 147 event[6] = MESH_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 pb_transport_cid, uint8_t reason){ 152 uint8_t event[6] = { HCI_EVENT_MESH_META, 3, MESH_SUBEVENT_PB_TRANSPORT_LINK_CLOSED}; 153 little_endian_store_16(event, 3, pb_transport_cid); 154 event[5] = reason; 155 pb_adv_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void pb_adv_handle_bearer_control(uint32_t link_id, uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 159 UNUSED(transaction_nr); 160 UNUSED(size); 161 162 uint8_t bearer_opcode = pdu[0] >> 2; 163 uint8_t reason; 164 const uint8_t * own_device_uuid; 165 switch (bearer_opcode){ 166 case MESH_GENERIC_PROVISIONING_LINK_OPEN: // Open a session on a bearer with a device 167 // does it match our device_uuid? 168 own_device_uuid = mesh_node_get_device_uuid(); 169 if (!own_device_uuid) break; 170 if (memcmp(&pdu[1], own_device_uuid, 16) != 0) break; 171 switch(link_state){ 172 case LINK_STATE_W4_OPEN: 173 pb_adv_link_id = link_id; 174 pb_adv_provisioner_role = 0; 175 pb_adv_msg_in_transaction_nr = 0xff; // first transaction nr will be 0x00 176 pb_adv_msg_in_transaction_nr_prev = 0xff; 177 log_info("link open, id %08x", pb_adv_link_id); 178 printf("PB-ADV: Link Open %08x\n", pb_adv_link_id); 179 link_state = LINK_STATE_W2_SEND_ACK; 180 adv_bearer_request_can_send_now_for_provisioning_pdu(); 181 pb_adv_emit_link_open(0, pb_adv_cid); 182 break; 183 case LINK_STATE_OPEN: 184 if (pb_adv_link_id != link_id) break; 185 log_info("link open, resend ACK"); 186 link_state = LINK_STATE_W2_SEND_ACK; 187 adv_bearer_request_can_send_now_for_provisioning_pdu(); 188 break; 189 default: 190 break; 191 } 192 break; 193 #ifdef ENABLE_MESH_PROVISIONER 194 case MESH_GENERIC_PROVISIONING_LINK_ACK: // Acknowledge a session on a bearer 195 if (link_state != LINK_STATE_W4_ACK) break; 196 link_state = LINK_STATE_OPEN; 197 pb_adv_msg_out_transaction_nr = 0; 198 pb_adv_msg_in_transaction_nr = 0x7f; // first transaction nr will be 0x80 199 pb_adv_msg_in_transaction_nr_prev = 0x7f; 200 btstack_run_loop_remove_timer(&pb_adv_random_delay_timer); 201 log_info("link open, id %08x", pb_adv_link_id); 202 printf("PB-ADV: Link Open %08x\n", pb_adv_link_id); 203 pb_adv_emit_link_open(0, pb_adv_cid); 204 break; 205 #endif 206 case MESH_GENERIC_PROVISIONING_LINK_CLOSE: // Close a session on a bearer 207 // does it match link id 208 if (link_id != pb_adv_link_id) break; 209 reason = pdu[1]; 210 link_state = LINK_STATE_W4_OPEN; 211 log_info("link close, reason %x", reason); 212 pb_adv_emit_link_close(pb_adv_cid, reason); 213 break; 214 default: 215 log_info("BearerOpcode %x reserved for future use\n", bearer_opcode); 216 break; 217 } 218 } 219 220 static void pb_adv_pdu_complete(void){ 221 222 // Verify FCS 223 uint8_t pdu_crc = btstack_crc8_calc((uint8_t*)pb_adv_msg_in_buffer, pb_adv_msg_in_len); 224 if (pdu_crc != pb_adv_msg_in_fcs){ 225 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)); 226 return; 227 } 228 229 printf("PB-ADV: %02x complete\n", pb_adv_msg_in_transaction_nr); 230 231 // transaction complete 232 pb_adv_msg_in_transaction_nr_prev = pb_adv_msg_in_transaction_nr; 233 if (pb_adv_provisioner_role){ 234 pb_adv_msg_in_transaction_nr = 0x7f; // invalid 235 } else { 236 pb_adv_msg_in_transaction_nr = 0xff; // invalid 237 } 238 239 // Ack Transaction 240 pb_adv_msg_in_send_ack = 1; 241 pb_adv_run(); 242 243 // Forward to Provisioning 244 pb_adv_packet_handler(PROVISIONING_DATA_PACKET, 0, pb_adv_msg_in_buffer, pb_adv_msg_in_len); 245 } 246 247 static void pb_adv_handle_transaction_start(uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 248 249 // resend ack if packet from previous transaction received 250 if (transaction_nr != 0xff && transaction_nr == pb_adv_msg_in_transaction_nr_prev){ 251 printf("PB_ADV: %02x transaction complete, resending ack \n", transaction_nr); 252 pb_adv_msg_in_send_ack = 1; 253 return; 254 } 255 256 // new transaction? 257 if (transaction_nr != pb_adv_msg_in_transaction_nr){ 258 259 // check len 260 uint16_t msg_len = big_endian_read_16(pdu, 1); 261 if (msg_len > MESH_PB_ADV_MAX_PDU_SIZE){ 262 // abort transaction 263 return; 264 } 265 266 // check num segments 267 uint8_t last_segment = pdu[0] >> 2; 268 if (last_segment >= MESH_PB_ADV_MAX_SEGMENTS){ 269 // abort transaction 270 return; 271 } 272 273 printf("PB-ADV: %02x started\n", transaction_nr); 274 275 pb_adv_msg_in_transaction_nr = transaction_nr; 276 pb_adv_msg_in_len = msg_len; 277 pb_adv_msg_in_fcs = pdu[3]; 278 pb_adv_msg_in_last_segment = last_segment; 279 280 // set bits for segments 1..n (segment 0 already received in this message) 281 pb_adv_msg_in_segments_missing = (1 << last_segment) - 1; 282 283 // store payload 284 uint16_t payload_len = size - 4; 285 (void)memcpy(pb_adv_msg_in_buffer, &pdu[4], payload_len); 286 287 // complete? 288 if (pb_adv_msg_in_segments_missing == 0){ 289 pb_adv_pdu_complete(); 290 } 291 } 292 } 293 294 static void pb_adv_handle_transaction_cont(uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 295 296 // check transaction nr 297 if (transaction_nr != 0xff && transaction_nr == pb_adv_msg_in_transaction_nr_prev){ 298 printf("PB_ADV: %02x transaction complete, resending resending ack\n", transaction_nr); 299 pb_adv_msg_in_send_ack = 1; 300 return; 301 } 302 303 if (transaction_nr != pb_adv_msg_in_transaction_nr){ 304 printf("PB-ADV: %02x received msg for transaction nr %x\n", pb_adv_msg_in_transaction_nr, transaction_nr); 305 return; 306 } 307 308 // validate seg nr 309 uint8_t seg = pdu[0] >> 2; 310 if (seg >= MESH_PB_ADV_MAX_SEGMENTS || seg == 0){ 311 return; 312 } 313 314 // check if segment already received 315 uint8_t seg_mask = 1 << (seg-1); 316 if ((pb_adv_msg_in_segments_missing & seg_mask) == 0){ 317 printf("PB-ADV: %02x, segment %u already received\n", transaction_nr, seg); 318 return; 319 } 320 printf("PB-ADV: %02x, segment %u stored\n", transaction_nr, seg); 321 322 // calculate offset and fragment size 323 uint16_t msg_pos = MESH_PB_ADV_START_PAYLOAD + (seg-1) * MESH_PB_ADV_CONT_PAYLOAD; 324 uint16_t fragment_size = size - 1; 325 326 // check size if last segment 327 if (seg == pb_adv_msg_in_last_segment && (msg_pos + fragment_size) != pb_adv_msg_in_len){ 328 // last segment has invalid size 329 return; 330 } 331 332 // store segment and mark as received 333 (void)memcpy(&pb_adv_msg_in_buffer[msg_pos], &pdu[1], fragment_size); 334 pb_adv_msg_in_segments_missing &= ~seg_mask; 335 336 // last segment 337 if (pb_adv_msg_in_segments_missing == 0){ 338 pb_adv_pdu_complete(); 339 } 340 } 341 342 static void pb_adv_outgoing_transation_complete(uint8_t status){ 343 // stop sending 344 pb_adv_msg_out_active = 0; 345 // emit done 346 pb_adv_emit_pdu_sent(status); 347 // keep track of ack'ed transactions 348 pb_adv_msg_out_completed_transaction_nr = pb_adv_msg_out_transaction_nr; 349 // increment outgoing transaction nr 350 pb_adv_msg_out_transaction_nr++; 351 if (pb_adv_msg_out_transaction_nr == 0x00){ 352 // Device role 353 pb_adv_msg_out_transaction_nr = 0x80; 354 } 355 if (pb_adv_msg_out_transaction_nr == 0x80){ 356 // Provisioner role 357 pb_adv_msg_out_transaction_nr = 0x00; 358 } 359 } 360 361 static void pb_adv_handle_transaction_ack(uint8_t transaction_nr, const uint8_t * pdu, uint16_t size){ 362 UNUSED(pdu); 363 UNUSED(size); 364 if (transaction_nr == pb_adv_msg_out_transaction_nr){ 365 printf("PB-ADV: %02x ACK received\n", transaction_nr); 366 pb_adv_outgoing_transation_complete(ERROR_CODE_SUCCESS); 367 } else if (transaction_nr == pb_adv_msg_out_completed_transaction_nr){ 368 // Transaction ack received again 369 } else { 370 printf("PB-ADV: %02x unexpected Transaction ACK %x recevied\n", pb_adv_msg_out_transaction_nr, transaction_nr); 371 } 372 } 373 374 static int pb_adv_packet_to_send(void){ 375 return pb_adv_msg_in_send_ack || pb_adv_msg_out_active || (link_state == LINK_STATE_W4_ACK); 376 } 377 378 static void pb_adv_timer_handler(btstack_timer_source_t * ts){ 379 UNUSED(ts); 380 pb_adv_random_delay_active = 0; 381 if (!pb_adv_packet_to_send()) return; 382 adv_bearer_request_can_send_now_for_provisioning_pdu(); 383 } 384 385 static void pb_adv_run(void){ 386 if (!pb_adv_packet_to_send()) return; 387 if (pb_adv_random_delay_active) return; 388 389 // spec recommends 20-50 ms, we use 20-51 ms 390 pb_adv_random_delay_active = 1; 391 uint16_t random_delay_ms = 20 + (pb_adv_random() & 0x1f); 392 log_info("random delay %u ms", random_delay_ms); 393 btstack_run_loop_set_timer_handler(&pb_adv_random_delay_timer, &pb_adv_timer_handler); 394 btstack_run_loop_set_timer(&pb_adv_random_delay_timer, random_delay_ms); 395 btstack_run_loop_add_timer(&pb_adv_random_delay_timer); 396 } 397 398 static void pb_adv_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 399 UNUSED(channel); 400 401 if (packet_type != HCI_EVENT_PACKET) return; 402 const uint8_t * data; 403 uint8_t length; 404 uint32_t link_id; 405 uint8_t transaction_nr; 406 uint8_t generic_provisioning_control; 407 switch(packet[0]){ 408 case GAP_EVENT_ADVERTISING_REPORT: 409 // data starts at offset 12 410 data = &packet[12]; 411 // PDB ADV PDU 412 length = data[0]; 413 414 // validate length field 415 if ((12 + length) > size) return; 416 417 link_id = big_endian_read_32(data, 2); 418 transaction_nr = data[6]; 419 // generic provision PDU 420 generic_provisioning_control = data[7]; 421 mesh_gpcf_format_t generic_provisioning_control_format = (mesh_gpcf_format_t) generic_provisioning_control & 3; 422 423 // unless, we're waiting for LINK_OPEN, check link_id 424 if (link_state != LINK_STATE_W4_OPEN){ 425 if (link_id != pb_adv_link_id) break; 426 } 427 428 if (generic_provisioning_control_format == MESH_GPCF_PROV_BEARER_CONTROL){ 429 pb_adv_handle_bearer_control(link_id, transaction_nr, &data[7], length-6); 430 break; 431 } 432 433 // verify link id and link state 434 if (link_state != LINK_STATE_OPEN) break; 435 436 switch (generic_provisioning_control_format){ 437 case MESH_GPCF_TRANSACTION_START: 438 pb_adv_handle_transaction_start(transaction_nr, &data[7], length-6); 439 break; 440 case MESH_GPCF_TRANSACTION_CONT: 441 pb_adv_handle_transaction_cont(transaction_nr, &data[7], length-6); 442 break; 443 case MESH_GPCF_TRANSACTION_ACK: 444 pb_adv_handle_transaction_ack(transaction_nr, &data[7], length-6); 445 break; 446 default: 447 break; 448 } 449 pb_adv_run(); 450 break; 451 case HCI_EVENT_MESH_META: 452 switch(packet[2]){ 453 case MESH_SUBEVENT_CAN_SEND_NOW: 454 #ifdef ENABLE_MESH_PROVISIONER 455 if (link_state == LINK_STATE_W4_ACK){ 456 // build packet 457 uint8_t buffer[22]; 458 big_endian_store_32(buffer, 0, pb_adv_link_id); 459 buffer[4] = 0; // Transaction ID = 0 460 buffer[5] = (0 << 2) | 3; // Link Open | Provisioning Bearer Control 461 (void)memcpy(&buffer[6], pb_adv_peer_device_uuid, 16); 462 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 463 log_info("link open %08x", pb_adv_link_id); 464 printf("PB-ADV: Sending Link Open for device uuid: "); 465 printf_hexdump(pb_adv_peer_device_uuid, 16); 466 btstack_run_loop_set_timer_handler(&pb_adv_random_delay_timer, &pb_adv_timer_handler); 467 btstack_run_loop_set_timer(&pb_adv_random_delay_timer, PB_ADV_LINK_OPEN_RETRANSMIT_MS); 468 btstack_run_loop_add_timer(&pb_adv_random_delay_timer); 469 break; 470 } 471 #endif 472 if (link_state == LINK_STATE_CLOSING){ 473 log_info("link close %08x", pb_adv_link_id); 474 printf("PB-ADV: Sending Link Close\n"); 475 // build packet 476 uint8_t buffer[7]; 477 big_endian_store_32(buffer, 0, pb_adv_link_id); 478 buffer[4] = 0; // Transaction ID = 0 479 buffer[5] = (2 << 2) | 3; // Link Close | Provisioning Bearer Control 480 buffer[6] = pb_adv_link_close_reason; 481 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 482 pb_adv_link_close_countdown--; 483 if (pb_adv_link_close_countdown) { 484 adv_bearer_request_can_send_now_for_provisioning_pdu(); 485 } else { 486 link_state = LINK_STATE_W4_OPEN; 487 } 488 break; 489 } 490 if (link_state == LINK_STATE_W2_SEND_ACK){ 491 link_state = LINK_STATE_OPEN; 492 pb_adv_msg_out_transaction_nr = 0x80; 493 // build packet 494 uint8_t buffer[6]; 495 big_endian_store_32(buffer, 0, pb_adv_link_id); 496 buffer[4] = 0; 497 buffer[5] = (1 << 2) | 3; // Link Ack | Provisioning Bearer Control 498 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 499 log_info("link ack %08x", pb_adv_link_id); 500 printf("PB-ADV: Sending Link Open Ack\n"); 501 break; 502 } 503 if (pb_adv_msg_in_send_ack){ 504 pb_adv_msg_in_send_ack = 0; 505 uint8_t buffer[6]; 506 big_endian_store_32(buffer, 0, pb_adv_link_id); 507 buffer[4] = pb_adv_msg_in_transaction_nr_prev; 508 buffer[5] = MESH_GPCF_TRANSACTION_ACK; 509 adv_bearer_send_provisioning_pdu(buffer, sizeof(buffer)); 510 log_info("transaction ack %08x", pb_adv_link_id); 511 printf("PB-ADV: %02x sending ACK\n", pb_adv_msg_in_transaction_nr_prev); 512 pb_adv_run(); 513 break; 514 } 515 if (pb_adv_msg_out_active){ 516 517 // check timeout for outgoing message 518 // since uint32_t is used and time now must be greater than pb_adv_msg_out_start, 519 // this claculation is correct even when the run loop time overruns 520 uint32_t transaction_time_ms = btstack_run_loop_get_time_ms() - pb_adv_msg_out_start; 521 if (transaction_time_ms >= MESH_GENERIC_PROVISIONING_TRANSACTION_TIMEOUT_MS){ 522 pb_adv_outgoing_transation_complete(ERROR_CODE_CONNECTION_TIMEOUT); 523 return; 524 } 525 526 uint8_t buffer[29]; // ADV MTU 527 big_endian_store_32(buffer, 0, pb_adv_link_id); 528 buffer[4] = pb_adv_msg_out_transaction_nr; 529 uint16_t bytes_left; 530 uint16_t pos; 531 if (pb_adv_msg_out_pos == 0){ 532 // Transaction start 533 int seg_n = pb_adv_msg_out_len / 24; 534 pb_adv_msg_out_seg = 0; 535 buffer[5] = seg_n << 2 | MESH_GPCF_TRANSACTION_START; 536 big_endian_store_16(buffer, 6, pb_adv_msg_out_len); 537 buffer[8] = btstack_crc8_calc((uint8_t*)pb_adv_msg_out_buffer, pb_adv_msg_out_len); 538 pos = 9; 539 bytes_left = 24 - 4; 540 printf("PB-ADV: %02x Sending Start: ", pb_adv_msg_out_transaction_nr); 541 } else { 542 // Transaction continue 543 buffer[5] = pb_adv_msg_out_seg << 2 | MESH_GPCF_TRANSACTION_CONT; 544 pos = 6; 545 bytes_left = 24 - 1; 546 printf("PB-ADV: %02x Sending Cont: ", pb_adv_msg_out_transaction_nr); 547 } 548 pb_adv_msg_out_seg++; 549 uint16_t bytes_to_copy = btstack_min(bytes_left, pb_adv_msg_out_len - pb_adv_msg_out_pos); 550 (void)memcpy(&buffer[pos], 551 &pb_adv_msg_out_buffer[pb_adv_msg_out_pos], 552 bytes_to_copy); 553 pos += bytes_to_copy; 554 printf("bytes %02u, pos %02u, len %02u: ", bytes_to_copy, pb_adv_msg_out_pos, pb_adv_msg_out_len); 555 printf_hexdump(buffer, pos); 556 pb_adv_msg_out_pos += bytes_to_copy; 557 558 if (pb_adv_msg_out_pos == pb_adv_msg_out_len){ 559 // done 560 pb_adv_msg_out_pos = 0; 561 } 562 adv_bearer_send_provisioning_pdu(buffer, pos); 563 pb_adv_run(); 564 break; 565 } 566 break; 567 default: 568 break; 569 } 570 default: 571 break; 572 } 573 } 574 575 void pb_adv_init(void){ 576 adv_bearer_register_for_provisioning_pdu(&pb_adv_handler); 577 pb_adv_lfsr = 0x12345678; 578 pb_adv_random(); 579 } 580 581 void pb_adv_register_packet_handler(btstack_packet_handler_t packet_handler){ 582 pb_adv_packet_handler = packet_handler; 583 } 584 585 void pb_adv_send_pdu(uint16_t pb_transport_cid, const uint8_t * pdu, uint16_t size){ 586 UNUSED(pb_transport_cid); 587 printf("PB-ADV: Send packet "); 588 printf_hexdump(pdu, size); 589 pb_adv_msg_out_buffer = pdu; 590 pb_adv_msg_out_len = size; 591 pb_adv_msg_out_pos = 0; 592 pb_adv_msg_out_start = btstack_run_loop_get_time_ms(); 593 pb_adv_msg_out_active = 1; 594 pb_adv_run(); 595 } 596 597 /** 598 * Close Link 599 * @param pb_transport_cid 600 */ 601 void pb_adv_close_link(uint16_t pb_transport_cid, uint8_t reason){ 602 switch (link_state){ 603 case LINK_STATE_W4_ACK: 604 case LINK_STATE_OPEN: 605 case LINK_STATE_W2_SEND_ACK: 606 pb_adv_emit_link_close(pb_transport_cid, 0); 607 link_state = LINK_STATE_CLOSING; 608 pb_adv_link_close_countdown = 3; 609 pb_adv_link_close_reason = reason; 610 adv_bearer_request_can_send_now_for_provisioning_pdu(); 611 break; 612 case LINK_STATE_W4_OPEN: 613 case LINK_STATE_CLOSING: 614 // nothing to do 615 break; 616 } 617 } 618 619 #ifdef ENABLE_MESH_PROVISIONER 620 uint16_t pb_adv_create_link(const uint8_t * device_uuid){ 621 if (link_state != LINK_STATE_W4_OPEN) return 0; 622 623 pb_adv_peer_device_uuid = device_uuid; 624 pb_adv_provisioner_role = 1; 625 626 // create new 32-bit link id 627 pb_adv_link_id = pb_adv_random(); 628 629 // after sending OPEN, we wait for an ACK 630 link_state = LINK_STATE_W4_ACK; 631 632 // request outgoing 633 adv_bearer_request_can_send_now_for_provisioning_pdu(); 634 635 // dummy pb_adv_cid 636 return pb_adv_cid; 637 } 638 #endif 639 640