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