1 #include <net/if.h> 2 #include <errno.h> 3 #include <string.h> 4 #include <ctype.h> 5 #include <stdbool.h> 6 7 #include <netlink/genl/genl.h> 8 #include <netlink/genl/family.h> 9 #include <netlink/genl/ctrl.h> 10 #include <netlink/msg.h> 11 #include <netlink/attr.h> 12 13 #include "nl80211.h" 14 #include "iw.h" 15 16 #define WLAN_CAPABILITY_ESS (1<<0) 17 #define WLAN_CAPABILITY_IBSS (1<<1) 18 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2) 19 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3) 20 #define WLAN_CAPABILITY_PRIVACY (1<<4) 21 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5) 22 #define WLAN_CAPABILITY_PBCC (1<<6) 23 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7) 24 #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8) 25 #define WLAN_CAPABILITY_QOS (1<<9) 26 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10) 27 #define WLAN_CAPABILITY_APSD (1<<11) 28 #define WLAN_CAPABILITY_RADIO_MEASURE (1<<12) 29 #define WLAN_CAPABILITY_DSSS_OFDM (1<<13) 30 #define WLAN_CAPABILITY_DEL_BACK (1<<14) 31 #define WLAN_CAPABILITY_IMM_BACK (1<<15) 32 /* DMG (60gHz) 802.11ad */ 33 /* type - bits 0..1 */ 34 #define WLAN_CAPABILITY_DMG_TYPE_MASK (3<<0) 35 36 #define WLAN_CAPABILITY_DMG_TYPE_IBSS (1<<0) /* Tx by: STA */ 37 #define WLAN_CAPABILITY_DMG_TYPE_PBSS (2<<0) /* Tx by: PCP */ 38 #define WLAN_CAPABILITY_DMG_TYPE_AP (3<<0) /* Tx by: AP */ 39 40 #define WLAN_CAPABILITY_DMG_CBAP_ONLY (1<<2) 41 #define WLAN_CAPABILITY_DMG_CBAP_SOURCE (1<<3) 42 #define WLAN_CAPABILITY_DMG_PRIVACY (1<<4) 43 #define WLAN_CAPABILITY_DMG_ECPAC (1<<5) 44 45 #define WLAN_CAPABILITY_DMG_SPECTRUM_MGMT (1<<8) 46 #define WLAN_CAPABILITY_DMG_RADIO_MEASURE (1<<12) 47 48 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; 49 static unsigned char ieee80211_oui[3] = { 0x00, 0x0f, 0xac }; 50 static unsigned char wfa_oui[3] = { 0x50, 0x6f, 0x9a }; 51 52 struct scan_params { 53 bool unknown; 54 enum print_ie_type type; 55 bool show_both_ie_sets; 56 }; 57 58 #define IEEE80211_COUNTRY_EXTENSION_ID 201 59 60 union ieee80211_country_ie_triplet { 61 struct { 62 __u8 first_channel; 63 __u8 num_channels; 64 __s8 max_power; 65 } __attribute__ ((packed)) chans; 66 struct { 67 __u8 reg_extension_id; 68 __u8 reg_class; 69 __u8 coverage_class; 70 } __attribute__ ((packed)) ext; 71 } __attribute__ ((packed)); 72 73 static int parse_random_mac_addr(struct nl_msg *msg, char *arg) 74 { 75 char *a_addr, *a_mask, *sep; 76 unsigned char addr[ETH_ALEN], mask[ETH_ALEN]; 77 char *addrs = arg + 9; 78 79 if (*addrs != '=') 80 return 0; 81 82 addrs++; 83 sep = strchr(addrs, '/'); 84 a_addr = addrs; 85 86 if (!sep) 87 return 1; 88 89 *sep = 0; 90 a_mask = sep + 1; 91 if (mac_addr_a2n(addr, a_addr) || mac_addr_a2n(mask, a_mask)) 92 return 1; 93 94 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); 95 NLA_PUT(msg, NL80211_ATTR_MAC_MASK, ETH_ALEN, mask); 96 97 return 0; 98 nla_put_failure: 99 return -ENOBUFS; 100 } 101 102 int parse_sched_scan(struct nl_msg *msg, int *argc, char ***argv) 103 { 104 struct nl_msg *matchset = NULL, *freqs = NULL, *ssids = NULL; 105 struct nlattr *match = NULL; 106 enum { 107 ND_TOPLEVEL, 108 ND_MATCH, 109 ND_FREQS, 110 ND_ACTIVE, 111 } parse_state = ND_TOPLEVEL; 112 int c = *argc; 113 char *end, **v = *argv; 114 int err = 0, i = 0; 115 unsigned int freq, interval = 0, delay = 0; 116 bool have_matchset = false, have_freqs = false, have_ssids = false; 117 bool have_active = false, have_passive = false; 118 uint32_t flags = 0; 119 120 matchset = nlmsg_alloc(); 121 if (!matchset) { 122 err = -ENOBUFS; 123 goto out; 124 } 125 126 freqs = nlmsg_alloc(); 127 if (!freqs) { 128 err = -ENOBUFS; 129 goto out; 130 } 131 132 ssids = nlmsg_alloc(); 133 if (!ssids) { 134 err = -ENOMEM; 135 goto out; 136 } 137 138 while (c) { 139 switch (parse_state) { 140 case ND_TOPLEVEL: 141 if (!strcmp(v[0], "interval")) { 142 c--; v++; 143 if (c == 0) { 144 err = -EINVAL; 145 goto nla_put_failure; 146 } 147 148 if (interval) { 149 err = -EINVAL; 150 goto nla_put_failure; 151 } 152 interval = strtoul(v[0], &end, 10); 153 if (*end || !interval) { 154 err = -EINVAL; 155 goto nla_put_failure; 156 } 157 NLA_PUT_U32(msg, 158 NL80211_ATTR_SCHED_SCAN_INTERVAL, 159 interval); 160 } else if (!strcmp(v[0], "delay")) { 161 c--; v++; 162 if (c == 0) { 163 err = -EINVAL; 164 goto nla_put_failure; 165 } 166 167 if (delay) { 168 err = -EINVAL; 169 goto nla_put_failure; 170 } 171 delay = strtoul(v[0], &end, 10); 172 if (*end) { 173 err = -EINVAL; 174 goto nla_put_failure; 175 } 176 NLA_PUT_U32(msg, 177 NL80211_ATTR_SCHED_SCAN_DELAY, 178 delay); 179 } else if (!strcmp(v[0], "matches")) { 180 parse_state = ND_MATCH; 181 if (have_matchset) { 182 err = -EINVAL; 183 goto nla_put_failure; 184 } 185 186 i = 0; 187 } else if (!strcmp(v[0], "freqs")) { 188 parse_state = ND_FREQS; 189 if (have_freqs) { 190 err = -EINVAL; 191 goto nla_put_failure; 192 } 193 194 have_freqs = true; 195 i = 0; 196 } else if (!strcmp(v[0], "active")) { 197 parse_state = ND_ACTIVE; 198 if (have_active || have_passive) { 199 err = -EINVAL; 200 goto nla_put_failure; 201 } 202 203 have_active = true; 204 i = 0; 205 } else if (!strcmp(v[0], "passive")) { 206 if (have_active || have_passive) { 207 err = -EINVAL; 208 goto nla_put_failure; 209 } 210 211 have_passive = true; 212 } else if (!strncmp(v[0], "randomise", 9) || 213 !strncmp(v[0], "randomize", 9)) { 214 flags |= NL80211_SCAN_FLAG_RANDOM_ADDR; 215 if (c > 0) { 216 err = parse_random_mac_addr(msg, v[0]); 217 if (err) 218 goto nla_put_failure; 219 } 220 } else { 221 /* this element is not for us, so 222 * return to continue parsing. 223 */ 224 goto nla_put_failure; 225 } 226 c--; v++; 227 228 break; 229 case ND_MATCH: 230 if (!strcmp(v[0], "ssid")) { 231 c--; v++; 232 if (c == 0) { 233 err = -EINVAL; 234 goto nla_put_failure; 235 } 236 237 /* TODO: for now we can only have an 238 * SSID in the match, so we can start 239 * the match nest here. 240 */ 241 match = nla_nest_start(matchset, i); 242 if (!match) { 243 err = -ENOBUFS; 244 goto nla_put_failure; 245 } 246 247 NLA_PUT(matchset, 248 NL80211_SCHED_SCAN_MATCH_ATTR_SSID, 249 strlen(v[0]), v[0]); 250 nla_nest_end(matchset, match); 251 match = NULL; 252 253 have_matchset = true; 254 i++; 255 c--; v++; 256 } else { 257 /* other element that cannot be part 258 * of a match indicates the end of the 259 * match. */ 260 /* need at least one match in the matchset */ 261 if (i == 0) { 262 err = -EINVAL; 263 goto nla_put_failure; 264 } 265 266 parse_state = ND_TOPLEVEL; 267 } 268 269 break; 270 case ND_FREQS: 271 freq = strtoul(v[0], &end, 10); 272 if (*end) { 273 if (i == 0) { 274 err = -EINVAL; 275 goto nla_put_failure; 276 } 277 278 parse_state = ND_TOPLEVEL; 279 } else { 280 NLA_PUT_U32(freqs, i, freq); 281 i++; 282 c--; v++; 283 } 284 break; 285 case ND_ACTIVE: 286 if (!strcmp(v[0], "ssid")) { 287 c--; v++; 288 if (c == 0) { 289 err = -EINVAL; 290 goto nla_put_failure; 291 } 292 293 NLA_PUT(ssids, 294 NL80211_SCHED_SCAN_MATCH_ATTR_SSID, 295 strlen(v[0]), v[0]); 296 297 have_ssids = true; 298 i++; 299 c--; v++; 300 } else { 301 /* other element that cannot be part 302 * of a match indicates the end of the 303 * active set. */ 304 /* need at least one item in the set */ 305 if (i == 0) { 306 err = -EINVAL; 307 goto nla_put_failure; 308 } 309 310 parse_state = ND_TOPLEVEL; 311 } 312 break; 313 } 314 } 315 316 if (!have_ssids) 317 NLA_PUT(ssids, 1, 0, ""); 318 if (!have_passive) 319 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids); 320 if (have_freqs) 321 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs); 322 if (have_matchset) 323 nla_put_nested(msg, NL80211_ATTR_SCHED_SCAN_MATCH, matchset); 324 if (flags) 325 NLA_PUT_U32(msg, NL80211_ATTR_SCAN_FLAGS, flags); 326 327 nla_put_failure: 328 if (match) 329 nla_nest_end(msg, match); 330 nlmsg_free(freqs); 331 nlmsg_free(matchset); 332 333 out: 334 *argc = c; 335 *argv = v; 336 return err; 337 } 338 339 static int handle_scan(struct nl80211_state *state, 340 struct nl_cb *cb, 341 struct nl_msg *msg, 342 int argc, char **argv, 343 enum id_input id) 344 { 345 struct nl_msg *ssids = NULL, *freqs = NULL; 346 char *eptr; 347 int err = -ENOBUFS; 348 int i; 349 enum { 350 NONE, 351 FREQ, 352 IES, 353 SSID, 354 MESHID, 355 DONE, 356 } parse = NONE; 357 int freq; 358 bool passive = false, have_ssids = false, have_freqs = false; 359 size_t ies_len = 0, meshid_len = 0; 360 unsigned char *ies = NULL, *meshid = NULL, *tmpies; 361 unsigned int flags = 0; 362 363 ssids = nlmsg_alloc(); 364 if (!ssids) 365 return -ENOMEM; 366 367 freqs = nlmsg_alloc(); 368 if (!freqs) { 369 nlmsg_free(ssids); 370 return -ENOMEM; 371 } 372 373 for (i = 0; i < argc; i++) { 374 switch (parse) { 375 case NONE: 376 if (strcmp(argv[i], "freq") == 0) { 377 parse = FREQ; 378 have_freqs = true; 379 break; 380 } else if (strcmp(argv[i], "ies") == 0) { 381 parse = IES; 382 break; 383 } else if (strcmp(argv[i], "lowpri") == 0) { 384 flags |= NL80211_SCAN_FLAG_LOW_PRIORITY; 385 break; 386 } else if (strcmp(argv[i], "flush") == 0) { 387 flags |= NL80211_SCAN_FLAG_FLUSH; 388 break; 389 } else if (strcmp(argv[i], "ap-force") == 0) { 390 flags |= NL80211_SCAN_FLAG_AP; 391 break; 392 } else if (strncmp(argv[i], "randomise", 9) == 0 || 393 strncmp(argv[i], "randomize", 9) == 0) { 394 flags |= NL80211_SCAN_FLAG_RANDOM_ADDR; 395 err = parse_random_mac_addr(msg, argv[i]); 396 if (err) 397 goto nla_put_failure; 398 break; 399 } else if (strcmp(argv[i], "ssid") == 0) { 400 parse = SSID; 401 have_ssids = true; 402 break; 403 } else if (strcmp(argv[i], "passive") == 0) { 404 parse = DONE; 405 passive = true; 406 break; 407 } else if (strcmp(argv[i], "meshid") == 0) { 408 parse = MESHID; 409 break; 410 } 411 case DONE: 412 return 1; 413 case FREQ: 414 freq = strtoul(argv[i], &eptr, 10); 415 if (eptr != argv[i] + strlen(argv[i])) { 416 /* failed to parse as number -- maybe a tag? */ 417 i--; 418 parse = NONE; 419 continue; 420 } 421 NLA_PUT_U32(freqs, i, freq); 422 break; 423 case IES: 424 ies = parse_hex(argv[i], &ies_len); 425 if (!ies) 426 goto nla_put_failure; 427 parse = NONE; 428 break; 429 case SSID: 430 NLA_PUT(ssids, i, strlen(argv[i]), argv[i]); 431 break; 432 case MESHID: 433 meshid_len = strlen(argv[i]); 434 meshid = (unsigned char *) malloc(meshid_len + 2); 435 if (!meshid) 436 goto nla_put_failure; 437 meshid[0] = 114; /* mesh element id */ 438 meshid[1] = meshid_len; 439 memcpy(&meshid[2], argv[i], meshid_len); 440 meshid_len += 2; 441 parse = NONE; 442 break; 443 } 444 } 445 446 if (ies || meshid) { 447 tmpies = (unsigned char *) malloc(ies_len + meshid_len); 448 if (!tmpies) 449 goto nla_put_failure; 450 if (ies) { 451 memcpy(tmpies, ies, ies_len); 452 free(ies); 453 } 454 if (meshid) { 455 memcpy(&tmpies[ies_len], meshid, meshid_len); 456 free(meshid); 457 } 458 NLA_PUT(msg, NL80211_ATTR_IE, ies_len + meshid_len, tmpies); 459 free(tmpies); 460 } 461 462 if (!have_ssids) 463 NLA_PUT(ssids, 1, 0, ""); 464 if (!passive) 465 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids); 466 467 if (have_freqs) 468 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs); 469 if (flags) 470 NLA_PUT_U32(msg, NL80211_ATTR_SCAN_FLAGS, flags); 471 472 err = 0; 473 nla_put_failure: 474 nlmsg_free(ssids); 475 nlmsg_free(freqs); 476 return err; 477 } 478 479 static void tab_on_first(bool *first) 480 { 481 if (!*first) 482 printf("\t"); 483 else 484 *first = false; 485 } 486 487 static void print_ssid(const uint8_t type, uint8_t len, const uint8_t *data) 488 { 489 printf(" "); 490 print_ssid_escaped(len, data); 491 printf("\n"); 492 } 493 494 #define BSS_MEMBERSHIP_SELECTOR_VHT_PHY 126 495 #define BSS_MEMBERSHIP_SELECTOR_HT_PHY 127 496 497 static void print_supprates(const uint8_t type, uint8_t len, const uint8_t *data) 498 { 499 int i; 500 501 printf(" "); 502 503 for (i = 0; i < len; i++) { 504 int r = data[i] & 0x7f; 505 506 if (r == BSS_MEMBERSHIP_SELECTOR_VHT_PHY && data[i] & 0x80) 507 printf("VHT"); 508 else if (r == BSS_MEMBERSHIP_SELECTOR_HT_PHY && data[i] & 0x80) 509 printf("HT"); 510 else 511 printf("%d.%d", r/2, 5*(r&1)); 512 513 printf("%s ", data[i] & 0x80 ? "*" : ""); 514 } 515 printf("\n"); 516 } 517 518 static void print_ds(const uint8_t type, uint8_t len, const uint8_t *data) 519 { 520 printf(" channel %d\n", data[0]); 521 } 522 523 static const char *country_env_str(char environment) 524 { 525 switch (environment) { 526 case 'I': 527 return "Indoor only"; 528 case 'O': 529 return "Outdoor only"; 530 case ' ': 531 return "Indoor/Outdoor"; 532 default: 533 return "bogus"; 534 } 535 } 536 537 static void print_country(const uint8_t type, uint8_t len, const uint8_t *data) 538 { 539 printf(" %.*s", 2, data); 540 541 printf("\tEnvironment: %s\n", country_env_str(data[2])); 542 543 data += 3; 544 len -= 3; 545 546 if (len < 3) { 547 printf("\t\tNo country IE triplets present\n"); 548 return; 549 } 550 551 while (len >= 3) { 552 int end_channel; 553 union ieee80211_country_ie_triplet *triplet = (void *) data; 554 555 if (triplet->ext.reg_extension_id >= IEEE80211_COUNTRY_EXTENSION_ID) { 556 printf("\t\tExtension ID: %d Regulatory Class: %d Coverage class: %d (up to %dm)\n", 557 triplet->ext.reg_extension_id, 558 triplet->ext.reg_class, 559 triplet->ext.coverage_class, 560 triplet->ext.coverage_class * 450); 561 562 data += 3; 563 len -= 3; 564 continue; 565 } 566 567 /* 2 GHz */ 568 if (triplet->chans.first_channel <= 14) 569 end_channel = triplet->chans.first_channel + (triplet->chans.num_channels - 1); 570 else 571 end_channel = triplet->chans.first_channel + (4 * (triplet->chans.num_channels - 1)); 572 573 printf("\t\tChannels [%d - %d] @ %d dBm\n", triplet->chans.first_channel, end_channel, triplet->chans.max_power); 574 575 data += 3; 576 len -= 3; 577 } 578 579 return; 580 } 581 582 static void print_powerconstraint(const uint8_t type, uint8_t len, const uint8_t *data) 583 { 584 printf(" %d dB\n", data[0]); 585 } 586 587 static void print_tpcreport(const uint8_t type, uint8_t len, const uint8_t *data) 588 { 589 printf(" TX power: %d dBm\n", data[0]); 590 /* printf(" Link Margin (%d dB) is reserved in Beacons\n", data[1]); */ 591 } 592 593 static void print_erp(const uint8_t type, uint8_t len, const uint8_t *data) 594 { 595 if (data[0] == 0x00) 596 printf(" <no flags>"); 597 if (data[0] & 0x01) 598 printf(" NonERP_Present"); 599 if (data[0] & 0x02) 600 printf(" Use_Protection"); 601 if (data[0] & 0x04) 602 printf(" Barker_Preamble_Mode"); 603 printf("\n"); 604 } 605 606 static void print_cipher(const uint8_t *data) 607 { 608 if (memcmp(data, ms_oui, 3) == 0) { 609 switch (data[3]) { 610 case 0: 611 printf("Use group cipher suite"); 612 break; 613 case 1: 614 printf("WEP-40"); 615 break; 616 case 2: 617 printf("TKIP"); 618 break; 619 case 4: 620 printf("CCMP"); 621 break; 622 case 5: 623 printf("WEP-104"); 624 break; 625 default: 626 printf("%.02x-%.02x-%.02x:%d", 627 data[0], data[1] ,data[2], data[3]); 628 break; 629 } 630 } else if (memcmp(data, ieee80211_oui, 3) == 0) { 631 switch (data[3]) { 632 case 0: 633 printf("Use group cipher suite"); 634 break; 635 case 1: 636 printf("WEP-40"); 637 break; 638 case 2: 639 printf("TKIP"); 640 break; 641 case 4: 642 printf("CCMP"); 643 break; 644 case 5: 645 printf("WEP-104"); 646 break; 647 case 6: 648 printf("AES-128-CMAC"); 649 break; 650 case 7: 651 printf("NO-GROUP"); 652 break; 653 case 8: 654 printf("GCMP"); 655 break; 656 default: 657 printf("%.02x-%.02x-%.02x:%d", 658 data[0], data[1] ,data[2], data[3]); 659 break; 660 } 661 } else 662 printf("%.02x-%.02x-%.02x:%d", 663 data[0], data[1] ,data[2], data[3]); 664 } 665 666 static void print_auth(const uint8_t *data) 667 { 668 if (memcmp(data, ms_oui, 3) == 0) { 669 switch (data[3]) { 670 case 1: 671 printf("IEEE 802.1X"); 672 break; 673 case 2: 674 printf("PSK"); 675 break; 676 default: 677 printf("%.02x-%.02x-%.02x:%d", 678 data[0], data[1] ,data[2], data[3]); 679 break; 680 } 681 } else if (memcmp(data, ieee80211_oui, 3) == 0) { 682 switch (data[3]) { 683 case 1: 684 printf("IEEE 802.1X"); 685 break; 686 case 2: 687 printf("PSK"); 688 break; 689 case 3: 690 printf("FT/IEEE 802.1X"); 691 break; 692 case 4: 693 printf("FT/PSK"); 694 break; 695 case 5: 696 printf("IEEE 802.1X/SHA-256"); 697 break; 698 case 6: 699 printf("PSK/SHA-256"); 700 break; 701 case 7: 702 printf("TDLS/TPK"); 703 break; 704 default: 705 printf("%.02x-%.02x-%.02x:%d", 706 data[0], data[1] ,data[2], data[3]); 707 break; 708 } 709 } else if (memcmp(data, wfa_oui, 3) == 0) { 710 switch (data[3]) { 711 case 1: 712 printf("OSEN"); 713 break; 714 default: 715 printf("%.02x-%.02x-%.02x:%d", 716 data[0], data[1] ,data[2], data[3]); 717 break; 718 } 719 } else 720 printf("%.02x-%.02x-%.02x:%d", 721 data[0], data[1] ,data[2], data[3]); 722 } 723 724 static void _print_rsn_ie(const char *defcipher, const char *defauth, 725 uint8_t len, const uint8_t *data, int is_osen) 726 { 727 bool first = true; 728 __u16 count, capa; 729 int i; 730 731 if (!is_osen) { 732 __u16 version; 733 version = data[0] + (data[1] << 8); 734 tab_on_first(&first); 735 printf("\t * Version: %d\n", version); 736 737 data += 2; 738 len -= 2; 739 } 740 741 if (len < 4) { 742 tab_on_first(&first); 743 printf("\t * Group cipher: %s\n", defcipher); 744 printf("\t * Pairwise ciphers: %s\n", defcipher); 745 return; 746 } 747 748 tab_on_first(&first); 749 printf("\t * Group cipher: "); 750 print_cipher(data); 751 printf("\n"); 752 753 data += 4; 754 len -= 4; 755 756 if (len < 2) { 757 tab_on_first(&first); 758 printf("\t * Pairwise ciphers: %s\n", defcipher); 759 return; 760 } 761 762 count = data[0] | (data[1] << 8); 763 if (2 + (count * 4) > len) 764 goto invalid; 765 766 tab_on_first(&first); 767 printf("\t * Pairwise ciphers:"); 768 for (i = 0; i < count; i++) { 769 printf(" "); 770 print_cipher(data + 2 + (i * 4)); 771 } 772 printf("\n"); 773 774 data += 2 + (count * 4); 775 len -= 2 + (count * 4); 776 777 if (len < 2) { 778 tab_on_first(&first); 779 printf("\t * Authentication suites: %s\n", defauth); 780 return; 781 } 782 783 count = data[0] | (data[1] << 8); 784 if (2 + (count * 4) > len) 785 goto invalid; 786 787 tab_on_first(&first); 788 printf("\t * Authentication suites:"); 789 for (i = 0; i < count; i++) { 790 printf(" "); 791 print_auth(data + 2 + (i * 4)); 792 } 793 printf("\n"); 794 795 data += 2 + (count * 4); 796 len -= 2 + (count * 4); 797 798 if (len >= 2) { 799 capa = data[0] | (data[1] << 8); 800 tab_on_first(&first); 801 printf("\t * Capabilities:"); 802 if (capa & 0x0001) 803 printf(" PreAuth"); 804 if (capa & 0x0002) 805 printf(" NoPairwise"); 806 switch ((capa & 0x000c) >> 2) { 807 case 0: 808 printf(" 1-PTKSA-RC"); 809 break; 810 case 1: 811 printf(" 2-PTKSA-RC"); 812 break; 813 case 2: 814 printf(" 4-PTKSA-RC"); 815 break; 816 case 3: 817 printf(" 16-PTKSA-RC"); 818 break; 819 } 820 switch ((capa & 0x0030) >> 4) { 821 case 0: 822 printf(" 1-GTKSA-RC"); 823 break; 824 case 1: 825 printf(" 2-GTKSA-RC"); 826 break; 827 case 2: 828 printf(" 4-GTKSA-RC"); 829 break; 830 case 3: 831 printf(" 16-GTKSA-RC"); 832 break; 833 } 834 if (capa & 0x0040) 835 printf(" MFP-required"); 836 if (capa & 0x0080) 837 printf(" MFP-capable"); 838 if (capa & 0x0200) 839 printf(" Peerkey-enabled"); 840 if (capa & 0x0400) 841 printf(" SPP-AMSDU-capable"); 842 if (capa & 0x0800) 843 printf(" SPP-AMSDU-required"); 844 printf(" (0x%.4x)\n", capa); 845 data += 2; 846 len -= 2; 847 } 848 849 if (len >= 2) { 850 int pmkid_count = data[0] | (data[1] << 8); 851 852 if (len >= 2 + 16 * pmkid_count) { 853 tab_on_first(&first); 854 printf("\t * %d PMKIDs\n", pmkid_count); 855 /* not printing PMKID values */ 856 data += 2 + 16 * pmkid_count; 857 len -= 2 + 16 * pmkid_count; 858 } else 859 goto invalid; 860 } 861 862 if (len >= 4) { 863 tab_on_first(&first); 864 printf("\t * Group mgmt cipher suite: "); 865 print_cipher(data); 866 printf("\n"); 867 data += 4; 868 len -= 4; 869 } 870 871 invalid: 872 if (len != 0) { 873 printf("\t\t * bogus tail data (%d):", len); 874 while (len) { 875 printf(" %.2x", *data); 876 data++; 877 len--; 878 } 879 printf("\n"); 880 } 881 } 882 883 static void print_rsn_ie(const char *defcipher, const char *defauth, 884 uint8_t len, const uint8_t *data) 885 { 886 _print_rsn_ie(defcipher, defauth, len, data, 0); 887 } 888 889 static void print_osen_ie(const char *defcipher, const char *defauth, 890 uint8_t len, const uint8_t *data) 891 { 892 printf("\n\t"); 893 _print_rsn_ie(defcipher, defauth, len, data, 1); 894 } 895 896 static void print_rsn(const uint8_t type, uint8_t len, const uint8_t *data) 897 { 898 print_rsn_ie("CCMP", "IEEE 802.1X", len, data); 899 } 900 901 static void print_ht_capa(const uint8_t type, uint8_t len, const uint8_t *data) 902 { 903 printf("\n"); 904 print_ht_capability(data[0] | (data[1] << 8)); 905 print_ampdu_length(data[2] & 3); 906 print_ampdu_spacing((data[2] >> 2) & 7); 907 print_ht_mcs(data + 3); 908 } 909 910 static const char* ntype_11u(uint8_t t) 911 { 912 switch (t) { 913 case 0: return "Private"; 914 case 1: return "Private with Guest"; 915 case 2: return "Chargeable Public"; 916 case 3: return "Free Public"; 917 case 4: return "Personal Device"; 918 case 5: return "Emergency Services Only"; 919 case 14: return "Test or Experimental"; 920 case 15: return "Wildcard"; 921 default: return "Reserved"; 922 } 923 } 924 925 static const char* vgroup_11u(uint8_t t) 926 { 927 switch (t) { 928 case 0: return "Unspecified"; 929 case 1: return "Assembly"; 930 case 2: return "Business"; 931 case 3: return "Educational"; 932 case 4: return "Factory and Industrial"; 933 case 5: return "Institutional"; 934 case 6: return "Mercantile"; 935 case 7: return "Residential"; 936 case 8: return "Storage"; 937 case 9: return "Utility and Miscellaneous"; 938 case 10: return "Vehicular"; 939 case 11: return "Outdoor"; 940 default: return "Reserved"; 941 } 942 } 943 944 static void print_interworking(const uint8_t type, uint8_t len, const uint8_t *data) 945 { 946 /* See Section 7.3.2.92 in the 802.11u spec. */ 947 printf("\n"); 948 if (len >= 1) { 949 uint8_t ano = data[0]; 950 printf("\t\tNetwork Options: 0x%hx\n", (unsigned short)(ano)); 951 printf("\t\t\tNetwork Type: %i (%s)\n", 952 (int)(ano & 0xf), ntype_11u(ano & 0xf)); 953 if (ano & (1<<4)) 954 printf("\t\t\tInternet\n"); 955 if (ano & (1<<5)) 956 printf("\t\t\tASRA\n"); 957 if (ano & (1<<6)) 958 printf("\t\t\tESR\n"); 959 if (ano & (1<<7)) 960 printf("\t\t\tUESA\n"); 961 } 962 if ((len == 3) || (len == 9)) { 963 printf("\t\tVenue Group: %i (%s)\n", 964 (int)(data[1]), vgroup_11u(data[1])); 965 printf("\t\tVenue Type: %i\n", (int)(data[2])); 966 } 967 if (len == 9) 968 printf("\t\tHESSID: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n", 969 data[3], data[4], data[5], data[6], data[7], data[8]); 970 else if (len == 7) 971 printf("\t\tHESSID: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n", 972 data[1], data[2], data[3], data[4], data[5], data[6]); 973 } 974 975 static void print_11u_advert(const uint8_t type, uint8_t len, const uint8_t *data) 976 { 977 /* See Section 7.3.2.93 in the 802.11u spec. */ 978 /* TODO: This code below does not decode private protocol IDs */ 979 int idx = 0; 980 printf("\n"); 981 while (idx < (len - 1)) { 982 uint8_t qri = data[idx]; 983 uint8_t proto_id = data[idx + 1]; 984 printf("\t\tQuery Response Info: 0x%hx\n", (unsigned short)(qri)); 985 printf("\t\t\tQuery Response Length Limit: %i\n", 986 (qri & 0x7f)); 987 if (qri & (1<<7)) 988 printf("\t\t\tPAME-BI\n"); 989 switch(proto_id) { 990 case 0: 991 printf("\t\t\tANQP\n"); break; 992 case 1: 993 printf("\t\t\tMIH Information Service\n"); break; 994 case 2: 995 printf("\t\t\tMIH Command and Event Services Capability Discovery\n"); break; 996 case 3: 997 printf("\t\t\tEmergency Alert System (EAS)\n"); break; 998 case 221: 999 printf("\t\t\tVendor Specific\n"); break; 1000 default: 1001 printf("\t\t\tReserved: %i\n", proto_id); break; 1002 } 1003 idx += 2; 1004 } 1005 } 1006 1007 static void print_11u_rcon(const uint8_t type, uint8_t len, const uint8_t *data) 1008 { 1009 /* See Section 7.3.2.96 in the 802.11u spec. */ 1010 int idx = 0; 1011 int ln0 = data[1] & 0xf; 1012 int ln1 = ((data[1] & 0xf0) >> 4); 1013 int ln2 = 0; 1014 printf("\n"); 1015 1016 if (ln1) 1017 ln2 = len - 2 - ln0 - ln1; 1018 1019 printf("\t\tANQP OIs: %i\n", data[0]); 1020 1021 if (ln0 > 0) { 1022 printf("\t\tOI 1: "); 1023 if (2 + ln0 > len) { 1024 printf("Invalid IE length.\n"); 1025 } else { 1026 for (idx = 0; idx < ln0; idx++) { 1027 printf("%02hx", data[2 + idx]); 1028 } 1029 printf("\n"); 1030 } 1031 } 1032 1033 if (ln1 > 0) { 1034 printf("\t\tOI 2: "); 1035 if (2 + ln0 + ln1 > len) { 1036 printf("Invalid IE length.\n"); 1037 } else { 1038 for (idx = 0; idx < ln1; idx++) { 1039 printf("%02hx", data[2 + ln0 + idx]); 1040 } 1041 printf("\n"); 1042 } 1043 } 1044 1045 if (ln2 > 0) { 1046 printf("\t\tOI 3: "); 1047 if (2 + ln0 + ln1 + ln2 > len) { 1048 printf("Invalid IE length.\n"); 1049 } else { 1050 for (idx = 0; idx < ln2; idx++) { 1051 printf("%02hx", data[2 + ln0 + ln1 + idx]); 1052 } 1053 printf("\n"); 1054 } 1055 } 1056 } 1057 1058 static const char *ht_secondary_offset[4] = { 1059 "no secondary", 1060 "above", 1061 "[reserved!]", 1062 "below", 1063 }; 1064 1065 static void print_ht_op(const uint8_t type, uint8_t len, const uint8_t *data) 1066 { 1067 static const char *protection[4] = { 1068 "no", 1069 "nonmember", 1070 "20 MHz", 1071 "non-HT mixed", 1072 }; 1073 static const char *sta_chan_width[2] = { 1074 "20 MHz", 1075 "any", 1076 }; 1077 1078 printf("\n"); 1079 printf("\t\t * primary channel: %d\n", data[0]); 1080 printf("\t\t * secondary channel offset: %s\n", 1081 ht_secondary_offset[data[1] & 0x3]); 1082 printf("\t\t * STA channel width: %s\n", sta_chan_width[(data[1] & 0x4)>>2]); 1083 printf("\t\t * RIFS: %d\n", (data[1] & 0x8)>>3); 1084 printf("\t\t * HT protection: %s\n", protection[data[2] & 0x3]); 1085 printf("\t\t * non-GF present: %d\n", (data[2] & 0x4) >> 2); 1086 printf("\t\t * OBSS non-GF present: %d\n", (data[2] & 0x10) >> 4); 1087 printf("\t\t * dual beacon: %d\n", (data[4] & 0x40) >> 6); 1088 printf("\t\t * dual CTS protection: %d\n", (data[4] & 0x80) >> 7); 1089 printf("\t\t * STBC beacon: %d\n", data[5] & 0x1); 1090 printf("\t\t * L-SIG TXOP Prot: %d\n", (data[5] & 0x2) >> 1); 1091 printf("\t\t * PCO active: %d\n", (data[5] & 0x4) >> 2); 1092 printf("\t\t * PCO phase: %d\n", (data[5] & 0x8) >> 3); 1093 } 1094 1095 static void print_capabilities(const uint8_t type, uint8_t len, const uint8_t *data) 1096 { 1097 int i, base, bit; 1098 bool first = true; 1099 1100 1101 for (i = 0; i < len; i++) { 1102 base = i * 8; 1103 1104 for (bit = 0; bit < 8; bit++) { 1105 if (!(data[i] & (1 << bit))) 1106 continue; 1107 1108 if (!first) 1109 printf(","); 1110 else 1111 first = false; 1112 1113 #define CAPA(bit, name) case bit: printf(" " name); break 1114 1115 switch (bit + base) { 1116 CAPA(0, "HT Information Exchange Supported"); 1117 CAPA(1, "reserved (On-demand Beacon)"); 1118 CAPA(2, "Extended Channel Switching"); 1119 CAPA(3, "reserved (Wave Indication)"); 1120 CAPA(4, "PSMP Capability"); 1121 CAPA(5, "reserved (Service Interval Granularity)"); 1122 CAPA(6, "S-PSMP Capability"); 1123 CAPA(7, "Event"); 1124 CAPA(8, "Diagnostics"); 1125 CAPA(9, "Multicast Diagnostics"); 1126 CAPA(10, "Location Tracking"); 1127 CAPA(11, "FMS"); 1128 CAPA(12, "Proxy ARP Service"); 1129 CAPA(13, "Collocated Interference Reporting"); 1130 CAPA(14, "Civic Location"); 1131 CAPA(15, "Geospatial Location"); 1132 CAPA(16, "TFS"); 1133 CAPA(17, "WNM-Sleep Mode"); 1134 CAPA(18, "TIM Broadcast"); 1135 CAPA(19, "BSS Transition"); 1136 CAPA(20, "QoS Traffic Capability"); 1137 CAPA(21, "AC Station Count"); 1138 CAPA(22, "Multiple BSSID"); 1139 CAPA(23, "Timing Measurement"); 1140 CAPA(24, "Channel Usage"); 1141 CAPA(25, "SSID List"); 1142 CAPA(26, "DMS"); 1143 CAPA(27, "UTC TSF Offset"); 1144 CAPA(28, "TDLS Peer U-APSD Buffer STA Support"); 1145 CAPA(29, "TDLS Peer PSM Support"); 1146 CAPA(30, "TDLS channel switching"); 1147 CAPA(31, "Interworking"); 1148 CAPA(32, "QoS Map"); 1149 CAPA(33, "EBR"); 1150 CAPA(34, "SSPN Interface"); 1151 CAPA(35, "Reserved"); 1152 CAPA(36, "MSGCF Capability"); 1153 CAPA(37, "TDLS Support"); 1154 CAPA(38, "TDLS Prohibited"); 1155 CAPA(39, "TDLS Channel Switching Prohibited"); 1156 CAPA(40, "Reject Unadmitted Frame"); 1157 CAPA(44, "Identifier Location"); 1158 CAPA(45, "U-APSD Coexistence"); 1159 CAPA(46, "WNM-Notification"); 1160 CAPA(47, "Reserved"); 1161 CAPA(48, "UTF-8 SSID"); 1162 default: 1163 printf(" %d", bit); 1164 break; 1165 } 1166 #undef CAPA 1167 } 1168 } 1169 1170 printf("\n"); 1171 } 1172 1173 static void print_tim(const uint8_t type, uint8_t len, const uint8_t *data) 1174 { 1175 printf(" DTIM Count %u DTIM Period %u Bitmap Control 0x%x " 1176 "Bitmap[0] 0x%x", 1177 data[0], data[1], data[2], data[3]); 1178 if (len - 4) 1179 printf(" (+ %u octet%s)", len - 4, len - 4 == 1 ? "" : "s"); 1180 printf("\n"); 1181 } 1182 1183 static void print_ibssatim(const uint8_t type, uint8_t len, const uint8_t *data) 1184 { 1185 printf(" %d TUs", (data[1] << 8) + data[0]); 1186 } 1187 1188 static void print_vht_capa(const uint8_t type, uint8_t len, const uint8_t *data) 1189 { 1190 printf("\n"); 1191 print_vht_info(data[0] | (data[1] << 8) | 1192 (data[2] << 16) | (data[3] << 24), 1193 data + 4); 1194 } 1195 1196 static void print_vht_oper(const uint8_t type, uint8_t len, const uint8_t *data) 1197 { 1198 const char *chandwidths[] = { 1199 [0] = "20 or 40 MHz", 1200 [1] = "80 MHz", 1201 [3] = "80+80 MHz", 1202 [2] = "160 MHz", 1203 }; 1204 1205 printf("\n"); 1206 printf("\t\t * channel width: %d (%s)\n", data[0], 1207 data[0] < ARRAY_SIZE(chandwidths) ? chandwidths[data[0]] : "unknown"); 1208 printf("\t\t * center freq segment 1: %d\n", data[1]); 1209 printf("\t\t * center freq segment 2: %d\n", data[2]); 1210 printf("\t\t * VHT basic MCS set: 0x%.2x%.2x\n", data[4], data[3]); 1211 } 1212 1213 static void print_obss_scan_params(const uint8_t type, uint8_t len, const uint8_t *data) 1214 { 1215 printf("\n"); 1216 printf("\t\t * passive dwell: %d TUs\n", (data[1] << 8) | data[0]); 1217 printf("\t\t * active dwell: %d TUs\n", (data[3] << 8) | data[2]); 1218 printf("\t\t * channel width trigger scan interval: %d s\n", (data[5] << 8) | data[4]); 1219 printf("\t\t * scan passive total per channel: %d TUs\n", (data[7] << 8) | data[6]); 1220 printf("\t\t * scan active total per channel: %d TUs\n", (data[9] << 8) | data[8]); 1221 printf("\t\t * BSS width channel transition delay factor: %d\n", (data[11] << 8) | data[10]); 1222 printf("\t\t * OBSS Scan Activity Threshold: %d.%02d %%\n", 1223 ((data[13] << 8) | data[12]) / 100, ((data[13] << 8) | data[12]) % 100); 1224 } 1225 1226 static void print_secchan_offs(const uint8_t type, uint8_t len, const uint8_t *data) 1227 { 1228 if (data[0] < ARRAY_SIZE(ht_secondary_offset)) 1229 printf(" %s (%d)\n", ht_secondary_offset[data[0]], data[0]); 1230 else 1231 printf(" %d\n", data[0]); 1232 } 1233 1234 static void print_bss_load(const uint8_t type, uint8_t len, const uint8_t *data) 1235 { 1236 printf("\n"); 1237 printf("\t\t * station count: %d\n", (data[1] << 8) | data[0]); 1238 printf("\t\t * channel utilisation: %d/255\n", data[2]); 1239 printf("\t\t * available admission capacity: %d [*32us]\n", (data[4] << 8) | data[3]); 1240 } 1241 1242 static void print_mesh_conf(const uint8_t type, uint8_t len, const uint8_t *data) 1243 { 1244 printf("\n"); 1245 printf("\t\t * Active Path Selection Protocol ID: %d\n", data[0]); 1246 printf("\t\t * Active Path Selection Metric ID: %d\n", data[1]); 1247 printf("\t\t * Congestion Control Mode ID: %d\n", data[2]); 1248 printf("\t\t * Synchronization Method ID: %d\n", data[3]); 1249 printf("\t\t * Authentication Protocol ID: %d\n", data[4]); 1250 printf("\t\t * Mesh Formation Info:\n"); 1251 printf("\t\t\t Number of Peerings: %d\n", (data[5] & 0x7E) >> 1); 1252 if (data[5] & 0x01) 1253 printf("\t\t\t Connected to Mesh Gate\n"); 1254 if (data[5] & 0x80) 1255 printf("\t\t\t Connected to AS\n"); 1256 printf("\t\t * Mesh Capability\n"); 1257 if (data[6] & 0x01) 1258 printf("\t\t\t Accepting Additional Mesh Peerings\n"); 1259 if (data[6] & 0x02) 1260 printf("\t\t\t MCCA Supported\n"); 1261 if (data[6] & 0x04) 1262 printf("\t\t\t MCCA Enabled\n"); 1263 if (data[6] & 0x08) 1264 printf("\t\t\t Forwarding\n"); 1265 if (data[6] & 0x10) 1266 printf("\t\t\t MBCA Supported\n"); 1267 if (data[6] & 0x20) 1268 printf("\t\t\t TBTT Adjusting\n"); 1269 if (data[6] & 0x40) 1270 printf("\t\t\t Mesh Power Save Level\n"); 1271 } 1272 1273 struct ie_print { 1274 const char *name; 1275 void (*print)(const uint8_t type, uint8_t len, const uint8_t *data); 1276 uint8_t minlen, maxlen; 1277 uint8_t flags; 1278 }; 1279 1280 static void print_ie(const struct ie_print *p, const uint8_t type, 1281 uint8_t len, const uint8_t *data) 1282 { 1283 int i; 1284 1285 if (!p->print) 1286 return; 1287 1288 printf("\t%s:", p->name); 1289 if (len < p->minlen || len > p->maxlen) { 1290 if (len > 1) { 1291 printf(" <invalid: %d bytes:", len); 1292 for (i = 0; i < len; i++) 1293 printf(" %.02x", data[i]); 1294 printf(">\n"); 1295 } else if (len) 1296 printf(" <invalid: 1 byte: %.02x>\n", data[0]); 1297 else 1298 printf(" <invalid: no data>\n"); 1299 return; 1300 } 1301 1302 p->print(type, len, data); 1303 } 1304 1305 #define PRINT_IGN { \ 1306 .name = "IGNORE", \ 1307 .print = NULL, \ 1308 .minlen = 0, \ 1309 .maxlen = 255, \ 1310 } 1311 1312 static const struct ie_print ieprinters[] = { 1313 [0] = { "SSID", print_ssid, 0, 32, BIT(PRINT_SCAN) | BIT(PRINT_LINK), }, 1314 [1] = { "Supported rates", print_supprates, 0, 255, BIT(PRINT_SCAN), }, 1315 [3] = { "DS Parameter set", print_ds, 1, 1, BIT(PRINT_SCAN), }, 1316 [5] = { "TIM", print_tim, 4, 255, BIT(PRINT_SCAN), }, 1317 [6] = { "IBSS ATIM window", print_ibssatim, 2, 2, BIT(PRINT_SCAN), }, 1318 [7] = { "Country", print_country, 3, 255, BIT(PRINT_SCAN), }, 1319 [11] = { "BSS Load", print_bss_load, 5, 5, BIT(PRINT_SCAN), }, 1320 [32] = { "Power constraint", print_powerconstraint, 1, 1, BIT(PRINT_SCAN), }, 1321 [35] = { "TPC report", print_tpcreport, 2, 2, BIT(PRINT_SCAN), }, 1322 [42] = { "ERP", print_erp, 1, 255, BIT(PRINT_SCAN), }, 1323 [45] = { "HT capabilities", print_ht_capa, 26, 26, BIT(PRINT_SCAN), }, 1324 [47] = { "ERP D4.0", print_erp, 1, 255, BIT(PRINT_SCAN), }, 1325 [74] = { "Overlapping BSS scan params", print_obss_scan_params, 14, 255, BIT(PRINT_SCAN), }, 1326 [61] = { "HT operation", print_ht_op, 22, 22, BIT(PRINT_SCAN), }, 1327 [62] = { "Secondary Channel Offset", print_secchan_offs, 1, 1, BIT(PRINT_SCAN), }, 1328 [191] = { "VHT capabilities", print_vht_capa, 12, 255, BIT(PRINT_SCAN), }, 1329 [192] = { "VHT operation", print_vht_oper, 5, 255, BIT(PRINT_SCAN), }, 1330 [48] = { "RSN", print_rsn, 2, 255, BIT(PRINT_SCAN), }, 1331 [50] = { "Extended supported rates", print_supprates, 0, 255, BIT(PRINT_SCAN), }, 1332 [113] = { "MESH Configuration", print_mesh_conf, 7, 7, BIT(PRINT_SCAN), }, 1333 [114] = { "MESH ID", print_ssid, 0, 32, BIT(PRINT_SCAN) | BIT(PRINT_LINK), }, 1334 [127] = { "Extended capabilities", print_capabilities, 0, 255, BIT(PRINT_SCAN), }, 1335 [107] = { "802.11u Interworking", print_interworking, 0, 255, BIT(PRINT_SCAN), }, 1336 [108] = { "802.11u Advertisement", print_11u_advert, 0, 255, BIT(PRINT_SCAN), }, 1337 [111] = { "802.11u Roaming Consortium", print_11u_rcon, 0, 255, BIT(PRINT_SCAN), }, 1338 }; 1339 1340 static void print_wifi_wpa(const uint8_t type, uint8_t len, const uint8_t *data) 1341 { 1342 print_rsn_ie("TKIP", "IEEE 802.1X", len, data); 1343 } 1344 1345 static void print_wifi_osen(const uint8_t type, uint8_t len, const uint8_t *data) 1346 { 1347 print_osen_ie("OSEN", "OSEN", len, data); 1348 } 1349 1350 static bool print_wifi_wmm_param(const uint8_t *data, uint8_t len) 1351 { 1352 int i; 1353 static const char *aci_tbl[] = { "BE", "BK", "VI", "VO" }; 1354 1355 if (len < 19) 1356 goto invalid; 1357 1358 if (data[0] != 1) { 1359 printf("Parameter: not version 1: "); 1360 return false; 1361 } 1362 1363 printf("\t * Parameter version 1"); 1364 1365 data++; 1366 1367 if (data[0] & 0x80) 1368 printf("\n\t\t * u-APSD"); 1369 1370 data += 2; 1371 1372 for (i = 0; i < 4; i++) { 1373 printf("\n\t\t * %s:", aci_tbl[(data[0] >> 5) & 3]); 1374 if (data[0] & 0x10) 1375 printf(" acm"); 1376 printf(" CW %d-%d", (1 << (data[1] & 0xf)) - 1, 1377 (1 << (data[1] >> 4)) - 1); 1378 printf(", AIFSN %d", data[0] & 0xf); 1379 if (data[2] | data[3]) 1380 printf(", TXOP %d usec", (data[2] + (data[3] << 8)) * 32); 1381 data += 4; 1382 } 1383 1384 printf("\n"); 1385 return true; 1386 1387 invalid: 1388 printf("invalid: "); 1389 return false; 1390 } 1391 1392 static void print_wifi_wmm(const uint8_t type, uint8_t len, const uint8_t *data) 1393 { 1394 int i; 1395 1396 switch (data[0]) { 1397 case 0x00: 1398 printf(" information:"); 1399 break; 1400 case 0x01: 1401 if (print_wifi_wmm_param(data + 1, len - 1)) 1402 return; 1403 break; 1404 default: 1405 printf(" type %d:", data[0]); 1406 break; 1407 } 1408 1409 for(i = 1; i < len; i++) 1410 printf(" %.02x", data[i]); 1411 printf("\n"); 1412 } 1413 1414 static const char * wifi_wps_dev_passwd_id(uint16_t id) 1415 { 1416 switch (id) { 1417 case 0: 1418 return "Default (PIN)"; 1419 case 1: 1420 return "User-specified"; 1421 case 2: 1422 return "Machine-specified"; 1423 case 3: 1424 return "Rekey"; 1425 case 4: 1426 return "PushButton"; 1427 case 5: 1428 return "Registrar-specified"; 1429 default: 1430 return "??"; 1431 } 1432 } 1433 1434 static void print_wifi_wps(const uint8_t type, uint8_t len, const uint8_t *data) 1435 { 1436 bool first = true; 1437 __u16 subtype, sublen; 1438 1439 while (len >= 4) { 1440 subtype = (data[0] << 8) + data[1]; 1441 sublen = (data[2] << 8) + data[3]; 1442 if (sublen > len) 1443 break; 1444 1445 switch (subtype) { 1446 case 0x104a: 1447 tab_on_first(&first); 1448 printf("\t * Version: %d.%d\n", data[4] >> 4, data[4] & 0xF); 1449 break; 1450 case 0x1011: 1451 tab_on_first(&first); 1452 printf("\t * Device name: %.*s\n", sublen, data + 4); 1453 break; 1454 case 0x1012: { 1455 uint16_t id; 1456 tab_on_first(&first); 1457 if (sublen != 2) { 1458 printf("\t * Device Password ID: (invalid " 1459 "length %d)\n", sublen); 1460 break; 1461 } 1462 id = data[4] << 8 | data[5]; 1463 printf("\t * Device Password ID: %u (%s)\n", 1464 id, wifi_wps_dev_passwd_id(id)); 1465 break; 1466 } 1467 case 0x1021: 1468 tab_on_first(&first); 1469 printf("\t * Manufacturer: %.*s\n", sublen, data + 4); 1470 break; 1471 case 0x1023: 1472 tab_on_first(&first); 1473 printf("\t * Model: %.*s\n", sublen, data + 4); 1474 break; 1475 case 0x1024: 1476 tab_on_first(&first); 1477 printf("\t * Model Number: %.*s\n", sublen, data + 4); 1478 break; 1479 case 0x103b: { 1480 __u8 val = data[4]; 1481 tab_on_first(&first); 1482 printf("\t * Response Type: %d%s\n", 1483 val, val == 3 ? " (AP)" : ""); 1484 break; 1485 } 1486 case 0x103c: { 1487 __u8 val = data[4]; 1488 tab_on_first(&first); 1489 printf("\t * RF Bands: 0x%x\n", val); 1490 break; 1491 } 1492 case 0x1041: { 1493 __u8 val = data[4]; 1494 tab_on_first(&first); 1495 printf("\t * Selected Registrar: 0x%x\n", val); 1496 break; 1497 } 1498 case 0x1042: 1499 tab_on_first(&first); 1500 printf("\t * Serial Number: %.*s\n", sublen, data + 4); 1501 break; 1502 case 0x1044: { 1503 __u8 val = data[4]; 1504 tab_on_first(&first); 1505 printf("\t * Wi-Fi Protected Setup State: %d%s%s\n", 1506 val, 1507 val == 1 ? " (Unconfigured)" : "", 1508 val == 2 ? " (Configured)" : ""); 1509 break; 1510 } 1511 case 0x1047: 1512 tab_on_first(&first); 1513 printf("\t * UUID: "); 1514 if (sublen != 16) { 1515 printf("(invalid, length=%d)\n", sublen); 1516 break; 1517 } 1518 printf("%02x%02x%02x%02x-%02x%02x-%02x%02x-" 1519 "%02x%02x-%02x%02x%02x%02x%02x%02x\n", 1520 data[4], data[5], data[6], data[7], 1521 data[8], data[9], data[10], data[11], 1522 data[12], data[13], data[14], data[15], 1523 data[16], data[17], data[18], data[19]); 1524 break; 1525 case 0x1054: { 1526 tab_on_first(&first); 1527 if (sublen != 8) { 1528 printf("\t * Primary Device Type: (invalid " 1529 "length %d)\n", sublen); 1530 break; 1531 } 1532 printf("\t * Primary Device Type: " 1533 "%u-%02x%02x%02x%02x-%u\n", 1534 data[4] << 8 | data[5], 1535 data[6], data[7], data[8], data[9], 1536 data[10] << 8 | data[11]); 1537 break; 1538 } 1539 case 0x1057: { 1540 __u8 val = data[4]; 1541 tab_on_first(&first); 1542 printf("\t * AP setup locked: 0x%.2x\n", val); 1543 break; 1544 } 1545 case 0x1008: 1546 case 0x1053: { 1547 __u16 meth = (data[4] << 8) + data[5]; 1548 bool comma = false; 1549 tab_on_first(&first); 1550 printf("\t * %sConfig methods:", 1551 subtype == 0x1053 ? "Selected Registrar ": ""); 1552 #define T(bit, name) do { \ 1553 if (meth & (1<<bit)) { \ 1554 if (comma) \ 1555 printf(","); \ 1556 comma = true; \ 1557 printf(" " name); \ 1558 } } while (0) 1559 T(0, "USB"); 1560 T(1, "Ethernet"); 1561 T(2, "Label"); 1562 T(3, "Display"); 1563 T(4, "Ext. NFC"); 1564 T(5, "Int. NFC"); 1565 T(6, "NFC Intf."); 1566 T(7, "PBC"); 1567 T(8, "Keypad"); 1568 printf("\n"); 1569 break; 1570 #undef T 1571 } 1572 default: { 1573 const __u8 *subdata = data + 4; 1574 __u16 tmplen = sublen; 1575 1576 tab_on_first(&first); 1577 printf("\t * Unknown TLV (%#.4x, %d bytes):", 1578 subtype, tmplen); 1579 while (tmplen) { 1580 printf(" %.2x", *subdata); 1581 subdata++; 1582 tmplen--; 1583 } 1584 printf("\n"); 1585 break; 1586 } 1587 } 1588 1589 data += sublen + 4; 1590 len -= sublen + 4; 1591 } 1592 1593 if (len != 0) { 1594 printf("\t\t * bogus tail data (%d):", len); 1595 while (len) { 1596 printf(" %.2x", *data); 1597 data++; 1598 len--; 1599 } 1600 printf("\n"); 1601 } 1602 } 1603 1604 static const struct ie_print wifiprinters[] = { 1605 [1] = { "WPA", print_wifi_wpa, 2, 255, BIT(PRINT_SCAN), }, 1606 [2] = { "WMM", print_wifi_wmm, 1, 255, BIT(PRINT_SCAN), }, 1607 [4] = { "WPS", print_wifi_wps, 0, 255, BIT(PRINT_SCAN), }, 1608 }; 1609 1610 static inline void print_p2p(const uint8_t type, uint8_t len, const uint8_t *data) 1611 { 1612 bool first = true; 1613 __u8 subtype; 1614 __u16 sublen; 1615 1616 while (len >= 3) { 1617 subtype = data[0]; 1618 sublen = (data[2] << 8) + data[1]; 1619 1620 if (sublen > len - 3) 1621 break; 1622 1623 switch (subtype) { 1624 case 0x02: /* capability */ 1625 tab_on_first(&first); 1626 if (sublen < 2) { 1627 printf("\t * malformed capability\n"); 1628 break; 1629 } 1630 printf("\t * Group capa: 0x%.2x, Device capa: 0x%.2x\n", 1631 data[3], data[4]); 1632 break; 1633 case 0x0d: /* device info */ 1634 if (sublen < 6 + 2 + 8 + 1) { 1635 printf("\t * malformed device info\n"); 1636 break; 1637 } 1638 /* fall through for now */ 1639 case 0x00: /* status */ 1640 case 0x01: /* minor reason */ 1641 case 0x03: /* device ID */ 1642 case 0x04: /* GO intent */ 1643 case 0x05: /* configuration timeout */ 1644 case 0x06: /* listen channel */ 1645 case 0x07: /* group BSSID */ 1646 case 0x08: /* ext listen timing */ 1647 case 0x09: /* intended interface address */ 1648 case 0x0a: /* manageability */ 1649 case 0x0b: /* channel list */ 1650 case 0x0c: /* NoA */ 1651 case 0x0e: /* group info */ 1652 case 0x0f: /* group ID */ 1653 case 0x10: /* interface */ 1654 case 0x11: /* operating channel */ 1655 case 0x12: /* invitation flags */ 1656 case 0xdd: /* vendor specific */ 1657 default: { 1658 const __u8 *subdata = data + 4; 1659 __u16 tmplen = sublen; 1660 1661 tab_on_first(&first); 1662 printf("\t * Unknown TLV (%#.2x, %d bytes):", 1663 subtype, tmplen); 1664 while (tmplen) { 1665 printf(" %.2x", *subdata); 1666 subdata++; 1667 tmplen--; 1668 } 1669 printf("\n"); 1670 break; 1671 } 1672 } 1673 1674 data += sublen + 3; 1675 len -= sublen + 3; 1676 } 1677 1678 if (len != 0) { 1679 tab_on_first(&first); 1680 printf("\t * bogus tail data (%d):", len); 1681 while (len) { 1682 printf(" %.2x", *data); 1683 data++; 1684 len--; 1685 } 1686 printf("\n"); 1687 } 1688 } 1689 1690 static inline void print_hs20_ind(const uint8_t type, uint8_t len, const uint8_t *data) 1691 { 1692 /* I can't find the spec for this...just going off what wireshark uses. */ 1693 printf("\n"); 1694 if (len > 0) 1695 printf("\t\tDGAF: %i\n", (int)(data[0] & 0x1)); 1696 else 1697 printf("\t\tUnexpected length: %i\n", len); 1698 } 1699 1700 static const struct ie_print wfa_printers[] = { 1701 [9] = { "P2P", print_p2p, 2, 255, BIT(PRINT_SCAN), }, 1702 [16] = { "HotSpot 2.0 Indication", print_hs20_ind, 1, 255, BIT(PRINT_SCAN), }, 1703 [18] = { "HotSpot 2.0 OSEN", print_wifi_osen, 1, 255, BIT(PRINT_SCAN), }, 1704 }; 1705 1706 static void print_vendor(unsigned char len, unsigned char *data, 1707 bool unknown, enum print_ie_type ptype) 1708 { 1709 int i; 1710 1711 if (len < 3) { 1712 printf("\tVendor specific: <too short> data:"); 1713 for(i = 0; i < len; i++) 1714 printf(" %.02x", data[i]); 1715 printf("\n"); 1716 return; 1717 } 1718 1719 if (len >= 4 && memcmp(data, ms_oui, 3) == 0) { 1720 if (data[3] < ARRAY_SIZE(wifiprinters) && 1721 wifiprinters[data[3]].name && 1722 wifiprinters[data[3]].flags & BIT(ptype)) { 1723 print_ie(&wifiprinters[data[3]], data[3], len - 4, data + 4); 1724 return; 1725 } 1726 if (!unknown) 1727 return; 1728 printf("\tMS/WiFi %#.2x, data:", data[3]); 1729 for(i = 0; i < len - 4; i++) 1730 printf(" %.02x", data[i + 4]); 1731 printf("\n"); 1732 return; 1733 } 1734 1735 if (len >= 4 && memcmp(data, wfa_oui, 3) == 0) { 1736 if (data[3] < ARRAY_SIZE(wfa_printers) && 1737 wfa_printers[data[3]].name && 1738 wfa_printers[data[3]].flags & BIT(ptype)) { 1739 print_ie(&wfa_printers[data[3]], data[3], len - 4, data + 4); 1740 return; 1741 } 1742 if (!unknown) 1743 return; 1744 printf("\tWFA %#.2x, data:", data[3]); 1745 for(i = 0; i < len - 4; i++) 1746 printf(" %.02x", data[i + 4]); 1747 printf("\n"); 1748 return; 1749 } 1750 1751 if (!unknown) 1752 return; 1753 1754 printf("\tVendor specific: OUI %.2x:%.2x:%.2x, data:", 1755 data[0], data[1], data[2]); 1756 for (i = 3; i < len; i++) 1757 printf(" %.2x", data[i]); 1758 printf("\n"); 1759 } 1760 1761 void print_ies(unsigned char *ie, int ielen, bool unknown, 1762 enum print_ie_type ptype) 1763 { 1764 while (ielen >= 2 && ielen >= ie[1]) { 1765 if (ie[0] < ARRAY_SIZE(ieprinters) && 1766 ieprinters[ie[0]].name && 1767 ieprinters[ie[0]].flags & BIT(ptype)) { 1768 print_ie(&ieprinters[ie[0]], ie[0], ie[1], ie + 2); 1769 } else if (ie[0] == 221 /* vendor */) { 1770 print_vendor(ie[1], ie + 2, unknown, ptype); 1771 } else if (unknown) { 1772 int i; 1773 1774 printf("\tUnknown IE (%d):", ie[0]); 1775 for (i=0; i<ie[1]; i++) 1776 printf(" %.2x", ie[2+i]); 1777 printf("\n"); 1778 } 1779 ielen -= ie[1] + 2; 1780 ie += ie[1] + 2; 1781 } 1782 } 1783 1784 static void print_capa_dmg(__u16 capa) 1785 { 1786 switch (capa & WLAN_CAPABILITY_DMG_TYPE_MASK) { 1787 case WLAN_CAPABILITY_DMG_TYPE_AP: 1788 printf(" DMG_ESS"); 1789 break; 1790 case WLAN_CAPABILITY_DMG_TYPE_PBSS: 1791 printf(" DMG_PCP"); 1792 break; 1793 case WLAN_CAPABILITY_DMG_TYPE_IBSS: 1794 printf(" DMG_IBSS"); 1795 break; 1796 } 1797 1798 if (capa & WLAN_CAPABILITY_DMG_CBAP_ONLY) 1799 printf(" CBAP_Only"); 1800 if (capa & WLAN_CAPABILITY_DMG_CBAP_SOURCE) 1801 printf(" CBAP_Src"); 1802 if (capa & WLAN_CAPABILITY_DMG_PRIVACY) 1803 printf(" Privacy"); 1804 if (capa & WLAN_CAPABILITY_DMG_ECPAC) 1805 printf(" ECPAC"); 1806 if (capa & WLAN_CAPABILITY_DMG_SPECTRUM_MGMT) 1807 printf(" SpectrumMgmt"); 1808 if (capa & WLAN_CAPABILITY_DMG_RADIO_MEASURE) 1809 printf(" RadioMeasure"); 1810 } 1811 1812 static void print_capa_non_dmg(__u16 capa) 1813 { 1814 if (capa & WLAN_CAPABILITY_ESS) 1815 printf(" ESS"); 1816 if (capa & WLAN_CAPABILITY_IBSS) 1817 printf(" IBSS"); 1818 if (capa & WLAN_CAPABILITY_CF_POLLABLE) 1819 printf(" CfPollable"); 1820 if (capa & WLAN_CAPABILITY_CF_POLL_REQUEST) 1821 printf(" CfPollReq"); 1822 if (capa & WLAN_CAPABILITY_PRIVACY) 1823 printf(" Privacy"); 1824 if (capa & WLAN_CAPABILITY_SHORT_PREAMBLE) 1825 printf(" ShortPreamble"); 1826 if (capa & WLAN_CAPABILITY_PBCC) 1827 printf(" PBCC"); 1828 if (capa & WLAN_CAPABILITY_CHANNEL_AGILITY) 1829 printf(" ChannelAgility"); 1830 if (capa & WLAN_CAPABILITY_SPECTRUM_MGMT) 1831 printf(" SpectrumMgmt"); 1832 if (capa & WLAN_CAPABILITY_QOS) 1833 printf(" QoS"); 1834 if (capa & WLAN_CAPABILITY_SHORT_SLOT_TIME) 1835 printf(" ShortSlotTime"); 1836 if (capa & WLAN_CAPABILITY_APSD) 1837 printf(" APSD"); 1838 if (capa & WLAN_CAPABILITY_RADIO_MEASURE) 1839 printf(" RadioMeasure"); 1840 if (capa & WLAN_CAPABILITY_DSSS_OFDM) 1841 printf(" DSSS-OFDM"); 1842 if (capa & WLAN_CAPABILITY_DEL_BACK) 1843 printf(" DelayedBACK"); 1844 if (capa & WLAN_CAPABILITY_IMM_BACK) 1845 printf(" ImmediateBACK"); 1846 } 1847 1848 static int print_bss_handler(struct nl_msg *msg, void *arg) 1849 { 1850 struct nlattr *tb[NL80211_ATTR_MAX + 1]; 1851 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 1852 struct nlattr *bss[NL80211_BSS_MAX + 1]; 1853 char mac_addr[20], dev[20]; 1854 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1855 [NL80211_BSS_TSF] = { .type = NLA_U64 }, 1856 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 1857 [NL80211_BSS_BSSID] = { }, 1858 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, 1859 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, 1860 [NL80211_BSS_INFORMATION_ELEMENTS] = { }, 1861 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, 1862 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, 1863 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1864 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 }, 1865 [NL80211_BSS_BEACON_IES] = { }, 1866 }; 1867 struct scan_params *params = arg; 1868 int show = params->show_both_ie_sets ? 2 : 1; 1869 bool is_dmg = false; 1870 1871 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), 1872 genlmsg_attrlen(gnlh, 0), NULL); 1873 1874 if (!tb[NL80211_ATTR_BSS]) { 1875 fprintf(stderr, "bss info missing!\n"); 1876 return NL_SKIP; 1877 } 1878 if (nla_parse_nested(bss, NL80211_BSS_MAX, 1879 tb[NL80211_ATTR_BSS], 1880 bss_policy)) { 1881 fprintf(stderr, "failed to parse nested attributes!\n"); 1882 return NL_SKIP; 1883 } 1884 1885 if (!bss[NL80211_BSS_BSSID]) 1886 return NL_SKIP; 1887 1888 mac_addr_n2a(mac_addr, nla_data(bss[NL80211_BSS_BSSID])); 1889 printf("BSS %s", mac_addr); 1890 if (tb[NL80211_ATTR_IFINDEX]) { 1891 if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev); 1892 printf("(on %s)", dev); 1893 } 1894 1895 if (bss[NL80211_BSS_STATUS]) { 1896 switch (nla_get_u32(bss[NL80211_BSS_STATUS])) { 1897 case NL80211_BSS_STATUS_AUTHENTICATED: 1898 printf(" -- authenticated"); 1899 break; 1900 case NL80211_BSS_STATUS_ASSOCIATED: 1901 printf(" -- associated"); 1902 break; 1903 case NL80211_BSS_STATUS_IBSS_JOINED: 1904 printf(" -- joined"); 1905 break; 1906 default: 1907 printf(" -- unknown status: %d", 1908 nla_get_u32(bss[NL80211_BSS_STATUS])); 1909 break; 1910 } 1911 } 1912 printf("\n"); 1913 1914 if (bss[NL80211_BSS_TSF]) { 1915 unsigned long long tsf; 1916 tsf = (unsigned long long)nla_get_u64(bss[NL80211_BSS_TSF]); 1917 printf("\tTSF: %llu usec (%llud, %.2lld:%.2llu:%.2llu)\n", 1918 tsf, tsf/1000/1000/60/60/24, (tsf/1000/1000/60/60) % 24, 1919 (tsf/1000/1000/60) % 60, (tsf/1000/1000) % 60); 1920 } 1921 if (bss[NL80211_BSS_FREQUENCY]) { 1922 int freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]); 1923 printf("\tfreq: %d\n", freq); 1924 if (freq > 45000) 1925 is_dmg = true; 1926 } 1927 if (bss[NL80211_BSS_BEACON_INTERVAL]) 1928 printf("\tbeacon interval: %d TUs\n", 1929 nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL])); 1930 if (bss[NL80211_BSS_CAPABILITY]) { 1931 __u16 capa = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); 1932 printf("\tcapability:"); 1933 if (is_dmg) 1934 print_capa_dmg(capa); 1935 else 1936 print_capa_non_dmg(capa); 1937 printf(" (0x%.4x)\n", capa); 1938 } 1939 if (bss[NL80211_BSS_SIGNAL_MBM]) { 1940 int s = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]); 1941 printf("\tsignal: %d.%.2d dBm\n", s/100, s%100); 1942 } 1943 if (bss[NL80211_BSS_SIGNAL_UNSPEC]) { 1944 unsigned char s = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]); 1945 printf("\tsignal: %d/100\n", s); 1946 } 1947 if (bss[NL80211_BSS_SEEN_MS_AGO]) { 1948 int age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]); 1949 printf("\tlast seen: %d ms ago\n", age); 1950 } 1951 1952 if (bss[NL80211_BSS_INFORMATION_ELEMENTS] && show--) { 1953 if (bss[NL80211_BSS_BEACON_IES]) 1954 printf("\tInformation elements from Probe Response " 1955 "frame:\n"); 1956 print_ies(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]), 1957 nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]), 1958 params->unknown, params->type); 1959 } 1960 if (bss[NL80211_BSS_BEACON_IES] && show--) { 1961 printf("\tInformation elements from Beacon frame:\n"); 1962 print_ies(nla_data(bss[NL80211_BSS_BEACON_IES]), 1963 nla_len(bss[NL80211_BSS_BEACON_IES]), 1964 params->unknown, params->type); 1965 } 1966 1967 return NL_SKIP; 1968 } 1969 1970 static struct scan_params scan_params; 1971 1972 static int handle_scan_dump(struct nl80211_state *state, 1973 struct nl_cb *cb, 1974 struct nl_msg *msg, 1975 int argc, char **argv, 1976 enum id_input id) 1977 { 1978 if (argc > 1) 1979 return 1; 1980 1981 memset(&scan_params, 0, sizeof(scan_params)); 1982 1983 if (argc == 1 && !strcmp(argv[0], "-u")) 1984 scan_params.unknown = true; 1985 else if (argc == 1 && !strcmp(argv[0], "-b")) 1986 scan_params.show_both_ie_sets = true; 1987 1988 scan_params.type = PRINT_SCAN; 1989 1990 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_bss_handler, 1991 &scan_params); 1992 return 0; 1993 } 1994 1995 static int handle_scan_combined(struct nl80211_state *state, 1996 struct nl_cb *cb, 1997 struct nl_msg *msg, 1998 int argc, char **argv, 1999 enum id_input id) 2000 { 2001 char **trig_argv; 2002 static char *dump_argv[] = { 2003 NULL, 2004 "scan", 2005 "dump", 2006 NULL, 2007 }; 2008 static const __u32 cmds[] = { 2009 NL80211_CMD_NEW_SCAN_RESULTS, 2010 NL80211_CMD_SCAN_ABORTED, 2011 }; 2012 int trig_argc, dump_argc, err; 2013 2014 if (argc >= 3 && !strcmp(argv[2], "-u")) { 2015 dump_argc = 4; 2016 dump_argv[3] = "-u"; 2017 } else if (argc >= 3 && !strcmp(argv[2], "-b")) { 2018 dump_argc = 4; 2019 dump_argv[3] = "-b"; 2020 } else 2021 dump_argc = 3; 2022 2023 trig_argc = 3 + (argc - 2) + (3 - dump_argc); 2024 trig_argv = calloc(trig_argc, sizeof(*trig_argv)); 2025 if (!trig_argv) 2026 return -ENOMEM; 2027 trig_argv[0] = argv[0]; 2028 trig_argv[1] = "scan"; 2029 trig_argv[2] = "trigger"; 2030 int i; 2031 for (i = 0; i < argc - 2 - (dump_argc - 3); i++) 2032 trig_argv[i + 3] = argv[i + 2 + (dump_argc - 3)]; 2033 err = handle_cmd(state, id, trig_argc, trig_argv); 2034 free(trig_argv); 2035 if (err) 2036 return err; 2037 2038 /* 2039 * WARNING: DO NOT COPY THIS CODE INTO YOUR APPLICATION 2040 * 2041 * This code has a bug, which requires creating a separate 2042 * nl80211 socket to fix: 2043 * It is possible for a NL80211_CMD_NEW_SCAN_RESULTS or 2044 * NL80211_CMD_SCAN_ABORTED message to be sent by the kernel 2045 * before (!) we listen to it, because we only start listening 2046 * after we send our scan request. 2047 * 2048 * Doing it the other way around has a race condition as well, 2049 * if you first open the events socket you may get a notification 2050 * for a previous scan. 2051 * 2052 * The only proper way to fix this would be to listen to events 2053 * before sending the command, and for the kernel to send the 2054 * scan request along with the event, so that you can match up 2055 * whether the scan you requested was finished or aborted (this 2056 * may result in processing a scan that another application 2057 * requested, but that doesn't seem to be a problem). 2058 * 2059 * Alas, the kernel doesn't do that (yet). 2060 */ 2061 2062 if (listen_events(state, ARRAY_SIZE(cmds), cmds) == 2063 NL80211_CMD_SCAN_ABORTED) { 2064 printf("scan aborted!\n"); 2065 return 0; 2066 } 2067 2068 dump_argv[0] = argv[0]; 2069 return handle_cmd(state, id, dump_argc, dump_argv); 2070 } 2071 TOPLEVEL(scan, "[-u] [freq <freq>*] [ies <hex as 00:11:..>] [meshid <meshid>] [lowpri,flush,ap-force] [randomise[=<addr>/<mask>]] [ssid <ssid>*|passive]", 0, 0, 2072 CIB_NETDEV, handle_scan_combined, 2073 "Scan on the given frequencies and probe for the given SSIDs\n" 2074 "(or wildcard if not given) unless passive scanning is requested.\n" 2075 "If -u is specified print unknown data in the scan results.\n" 2076 "Specified (vendor) IEs must be well-formed."); 2077 COMMAND(scan, dump, "[-u]", 2078 NL80211_CMD_GET_SCAN, NLM_F_DUMP, CIB_NETDEV, handle_scan_dump, 2079 "Dump the current scan results. If -u is specified, print unknown\n" 2080 "data in scan results."); 2081 COMMAND(scan, trigger, "[freq <freq>*] [ies <hex as 00:11:..>] [meshid <meshid>] [lowpri,flush,ap-force] [randomise[=<addr>/<mask>]] [ssid <ssid>*|passive]", 2082 NL80211_CMD_TRIGGER_SCAN, 0, CIB_NETDEV, handle_scan, 2083 "Trigger a scan on the given frequencies with probing for the given\n" 2084 "SSIDs (or wildcard if not given) unless passive scanning is requested."); 2085 2086 2087 static int handle_start_sched_scan(struct nl80211_state *state, 2088 struct nl_cb *cb, struct nl_msg *msg, 2089 int argc, char **argv, enum id_input id) 2090 { 2091 return parse_sched_scan(msg, &argc, &argv); 2092 } 2093 2094 static int handle_stop_sched_scan(struct nl80211_state *state, struct nl_cb *cb, 2095 struct nl_msg *msg, int argc, char **argv, 2096 enum id_input id) 2097 { 2098 if (argc != 0) 2099 return 1; 2100 2101 return 0; 2102 } 2103 2104 COMMAND(scan, sched_start, 2105 SCHED_SCAN_OPTIONS, 2106 NL80211_CMD_START_SCHED_SCAN, 0, CIB_NETDEV, handle_start_sched_scan, 2107 "Start a scheduled scan at the specified interval on the given frequencies\n" 2108 "with probing for the given SSIDs (or wildcard if not given) unless passive\n" 2109 "scanning is requested. If matches are specified, only matching results\n" 2110 "will be returned."); 2111 COMMAND(scan, sched_stop, "", 2112 NL80211_CMD_STOP_SCHED_SCAN, 0, CIB_NETDEV, handle_stop_sched_scan, 2113 "Stop an ongoing scheduled scan."); 2114
