1 /* 2 * iwinfo - Wireless Information Library - NL80211 Backend 3 * 4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org> 5 * 6 * The iwinfo library is free software: you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License version 2 8 * as published by the Free Software Foundation. 9 * 10 * The iwinfo library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 13 * See the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/. 17 * 18 * The signal handling code is derived from the official madwifi tools, 19 * wlanconfig.c in particular. The encryption property handling was 20 * inspired by the hostapd madwifi driver. 21 * 22 * Parts of this code are derived from the Linux iw utility. 23 */ 24 25 #include <sys/stat.h> 26 #include <limits.h> 27 #include <glob.h> 28 #include <fnmatch.h> 29 #include <stdarg.h> 30 #include <stdlib.h> 31 32 #include "iwinfo_nl80211.h" 33 34 #define min(x, y) ((x) < (y)) ? (x) : (y) 35 36 #define BIT(x) (1ULL<<(x)) 37 38 static struct nl80211_state *nls = NULL; 39 40 static void nl80211_close(void) 41 { 42 if (nls) 43 { 44 if (nls->nlctrl) 45 genl_family_put(nls->nlctrl); 46 47 if (nls->nl80211) 48 genl_family_put(nls->nl80211); 49 50 if (nls->nl_sock) 51 nl_socket_free(nls->nl_sock); 52 53 if (nls->nl_cache) 54 nl_cache_free(nls->nl_cache); 55 56 free(nls); 57 nls = NULL; 58 } 59 } 60 61 static int nl80211_init(void) 62 { 63 int err, fd; 64 65 if (!nls) 66 { 67 nls = malloc(sizeof(struct nl80211_state)); 68 if (!nls) { 69 err = -ENOMEM; 70 goto err; 71 } 72 73 memset(nls, 0, sizeof(*nls)); 74 75 nls->nl_sock = nl_socket_alloc(); 76 if (!nls->nl_sock) { 77 err = -ENOMEM; 78 goto err; 79 } 80 81 if (genl_connect(nls->nl_sock)) { 82 err = -ENOLINK; 83 goto err; 84 } 85 86 fd = nl_socket_get_fd(nls->nl_sock); 87 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) { 88 err = -EINVAL; 89 goto err; 90 } 91 92 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) { 93 err = -ENOMEM; 94 goto err; 95 } 96 97 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211"); 98 if (!nls->nl80211) { 99 err = -ENOENT; 100 goto err; 101 } 102 103 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl"); 104 if (!nls->nlctrl) { 105 err = -ENOENT; 106 goto err; 107 } 108 } 109 110 return 0; 111 112 113 err: 114 nl80211_close(); 115 return err; 116 } 117 118 static int nl80211_readint(const char *path) 119 { 120 int fd; 121 int rv = -1; 122 char buffer[16]; 123 124 if ((fd = open(path, O_RDONLY)) > -1) 125 { 126 if (read(fd, buffer, sizeof(buffer)) > 0) 127 rv = atoi(buffer); 128 129 close(fd); 130 } 131 132 return rv; 133 } 134 135 static int nl80211_readstr(const char *path, char *buffer, int length) 136 { 137 int fd; 138 int rv = -1; 139 140 if ((fd = open(path, O_RDONLY)) > -1) 141 { 142 if ((rv = read(fd, buffer, length - 1)) > 0) 143 { 144 if (buffer[rv - 1] == '\n') 145 rv--; 146 147 buffer[rv] = 0; 148 } 149 150 close(fd); 151 } 152 153 return rv; 154 } 155 156 static int nl80211_get_band(int nla_type) 157 { 158 switch (nla_type) 159 { 160 case NL80211_BAND_2GHZ: 161 return IWINFO_BAND_24; 162 case NL80211_BAND_5GHZ: 163 return IWINFO_BAND_5; 164 case NL80211_BAND_6GHZ: 165 return IWINFO_BAND_6; 166 case NL80211_BAND_60GHZ: 167 return IWINFO_BAND_60; 168 } 169 170 return 0; 171 } 172 173 174 static int nl80211_msg_error(struct sockaddr_nl *nla, 175 struct nlmsgerr *err, void *arg) 176 { 177 int *ret = arg; 178 *ret = err->error; 179 return NL_STOP; 180 } 181 182 static int nl80211_msg_finish(struct nl_msg *msg, void *arg) 183 { 184 int *ret = arg; 185 *ret = 0; 186 return NL_SKIP; 187 } 188 189 static int nl80211_msg_ack(struct nl_msg *msg, void *arg) 190 { 191 int *ret = arg; 192 *ret = 0; 193 return NL_STOP; 194 } 195 196 static int nl80211_msg_response(struct nl_msg *msg, void *arg) 197 { 198 return NL_SKIP; 199 } 200 201 static void nl80211_free(struct nl80211_msg_conveyor *cv) 202 { 203 if (cv) 204 { 205 if (cv->cb) 206 nl_cb_put(cv->cb); 207 208 if (cv->msg) 209 nlmsg_free(cv->msg); 210 211 cv->cb = NULL; 212 cv->msg = NULL; 213 } 214 } 215 216 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family, 217 int cmd, int flags) 218 { 219 static struct nl80211_msg_conveyor cv; 220 221 struct nl_msg *req = NULL; 222 struct nl_cb *cb = NULL; 223 224 req = nlmsg_alloc(); 225 if (!req) 226 goto err; 227 228 cb = nl_cb_alloc(NL_CB_DEFAULT); 229 if (!cb) 230 goto err; 231 232 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0); 233 234 cv.msg = req; 235 cv.cb = cb; 236 237 return &cv; 238 239 err: 240 if (req) 241 nlmsg_free(req); 242 243 return NULL; 244 } 245 246 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags) 247 { 248 if (nl80211_init() < 0) 249 return NULL; 250 251 return nl80211_new(nls->nlctrl, cmd, flags); 252 } 253 254 static const char *nl80211_phy_path_str(const char *phyname) 255 { 256 static char path[PATH_MAX]; 257 const char *prefix = "/sys/devices/"; 258 int prefix_len = strlen(prefix); 259 int buf_len, offset; 260 struct dirent *e; 261 char buf[512], *link; 262 int phy_idx; 263 int seq = 0; 264 DIR *d; 265 266 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", phyname); 267 phy_idx = nl80211_readint(buf); 268 if (phy_idx < 0) 269 return NULL; 270 271 buf_len = snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", phyname); 272 link = realpath(buf, path); 273 if (!link) 274 return NULL; 275 276 if (strncmp(link, prefix, prefix_len) != 0) 277 return NULL; 278 279 link += prefix_len; 280 281 prefix = "platform/"; 282 prefix_len = strlen(prefix); 283 if (!strncmp(link, prefix, prefix_len) && strstr(link, "/pci")) 284 link += prefix_len; 285 286 snprintf(buf + buf_len, sizeof(buf) - buf_len, "/ieee80211"); 287 d = opendir(buf); 288 if (!d) 289 return link; 290 291 while ((e = readdir(d)) != NULL) { 292 int cur_idx; 293 294 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name); 295 cur_idx = nl80211_readint(buf); 296 if (cur_idx < 0) 297 continue; 298 299 if (cur_idx >= phy_idx) 300 continue; 301 302 seq++; 303 } 304 305 closedir(d); 306 307 if (!seq) 308 return link; 309 310 offset = link - path + strlen(link); 311 snprintf(path + offset, sizeof(path) - offset, "+%d", seq); 312 313 return link; 314 } 315 316 static int nl80211_phy_idx_from_path(const char *path) 317 { 318 char buf[512]; 319 struct dirent *e; 320 const char *cur_path; 321 int cur_path_len; 322 int path_len; 323 int idx = -1; 324 DIR *d; 325 326 if (!path) 327 return -1; 328 329 path_len = strlen(path); 330 if (!path_len) 331 return -1; 332 333 d = opendir("/sys/class/ieee80211"); 334 if (!d) 335 return -1; 336 337 while ((e = readdir(d)) != NULL) { 338 cur_path = nl80211_phy_path_str(e->d_name); 339 if (!cur_path) 340 continue; 341 342 cur_path_len = strlen(cur_path); 343 if (cur_path_len < path_len) 344 continue; 345 346 if (strcmp(cur_path + cur_path_len - path_len, path) != 0) 347 continue; 348 349 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name); 350 idx = nl80211_readint(buf); 351 352 if (idx >= 0) 353 break; 354 } 355 356 closedir(d); 357 358 return idx; 359 } 360 361 static int nl80211_phy_idx_from_macaddr(const char *opt) 362 { 363 char buf[128]; 364 int i, idx = -1; 365 glob_t gl; 366 367 if (!opt) 368 return -1; 369 370 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); 371 if (glob(buf, 0, NULL, &gl)) 372 return -1; 373 374 for (i = 0; i < gl.gl_pathc; i++) 375 { 376 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]); 377 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0) 378 continue; 379 380 if (fnmatch(opt, buf, FNM_CASEFOLD)) 381 continue; 382 383 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]); 384 if ((idx = nl80211_readint(buf)) > -1) 385 break; 386 } 387 388 globfree(&gl); 389 390 return idx; 391 } 392 393 static int nl80211_phy_idx_from_phy(const char *opt) 394 { 395 char buf[128]; 396 397 if (!opt) 398 return -1; 399 400 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt); 401 return nl80211_readint(buf); 402 } 403 404 static int nl80211_phy_idx_from_uci(const char *name) 405 { 406 struct uci_section *s; 407 const char *opt; 408 int idx = -1; 409 410 s = iwinfo_uci_get_radio(name, "mac80211"); 411 if (!s) 412 goto out; 413 414 opt = uci_lookup_option_string(uci_ctx, s, "path"); 415 idx = nl80211_phy_idx_from_path(opt); 416 if (idx >= 0) 417 goto out; 418 419 opt = uci_lookup_option_string(uci_ctx, s, "macaddr"); 420 idx = nl80211_phy_idx_from_macaddr(opt); 421 if (idx >= 0) 422 goto out; 423 424 opt = uci_lookup_option_string(uci_ctx, s, "phy"); 425 idx = nl80211_phy_idx_from_phy(opt); 426 427 out: 428 iwinfo_uci_free(); 429 return idx; 430 } 431 432 static bool nl80211_is_ifname(const char *name) 433 { 434 struct stat st; 435 char buffer[PATH_MAX]; 436 437 snprintf(buffer, sizeof(buffer), "/sys/class/net/%s", name); 438 return !lstat(buffer, &st); 439 } 440 441 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, 442 int cmd, int flags) 443 { 444 unsigned int ifidx = 0; 445 int phyidx = -1; 446 struct nl80211_msg_conveyor *cv; 447 448 if (ifname == NULL) 449 return NULL; 450 451 if (nl80211_init() < 0) 452 return NULL; 453 454 if (!strncmp(ifname, "mon.", 4)) 455 ifidx = if_nametoindex(&ifname[4]); 456 else if (nl80211_is_ifname(ifname)) 457 ifidx = if_nametoindex(ifname); 458 else 459 { 460 phyidx = nl80211_phy_idx_from_phy(ifname); 461 if (phyidx < 0) 462 phyidx = nl80211_phy_idx_from_uci(ifname); 463 } 464 465 /* Valid ifidx must be greater than 0 */ 466 if ((ifidx <= 0) && (phyidx < 0)) 467 return NULL; 468 469 cv = nl80211_new(nls->nl80211, cmd, flags); 470 if (!cv) 471 return NULL; 472 473 if (ifidx > 0) 474 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx); 475 else if (phyidx > -1) 476 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx); 477 478 return cv; 479 480 nla_put_failure: 481 nl80211_free(cv); 482 return NULL; 483 } 484 485 static int nl80211_send(struct nl80211_msg_conveyor *cv, 486 int (*cb_func)(struct nl_msg *, void *), 487 void *cb_arg) 488 { 489 static struct nl80211_msg_conveyor rcv; 490 int err; 491 492 if (cb_func) 493 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg); 494 else 495 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv); 496 497 err = nl_send_auto_complete(nls->nl_sock, cv->msg); 498 499 if (err < 0) 500 goto out; 501 502 err = 1; 503 504 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err); 505 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err); 506 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err); 507 508 while (err > 0) 509 nl_recvmsgs(nls->nl_sock, cv->cb); 510 511 out: 512 nl80211_free(cv); 513 return err; 514 } 515 516 static int nl80211_request(const char *ifname, int cmd, int flags, 517 int (*cb_func)(struct nl_msg *, void *), 518 void *cb_arg) 519 { 520 struct nl80211_msg_conveyor *cv; 521 522 cv = nl80211_msg(ifname, cmd, flags); 523 524 if (!cv) 525 return -ENOMEM; 526 527 return nl80211_send(cv, cb_func, cb_arg); 528 } 529 530 static struct nlattr ** nl80211_parse(struct nl_msg *msg) 531 { 532 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 533 static struct nlattr *attr[NL80211_ATTR_MAX + 1]; 534 535 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), 536 genlmsg_attrlen(gnlh, 0), NULL); 537 538 return attr; 539 } 540 541 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg) 542 { 543 uint32_t *features = arg; 544 struct nlattr **attr = nl80211_parse(msg); 545 546 if (attr[NL80211_ATTR_PROTOCOL_FEATURES]) 547 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]); 548 549 return NL_SKIP; 550 } 551 552 static int nl80211_get_protocol_features(const char *ifname) 553 { 554 struct nl80211_msg_conveyor *req; 555 uint32_t features = 0; 556 557 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0); 558 if (req) { 559 nl80211_send(req, nl80211_get_protocol_features_cb, &features); 560 nl80211_free(req); 561 } 562 563 return features; 564 } 565 566 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg) 567 { 568 struct nl80211_group_conveyor *cv = arg; 569 570 struct nlattr **attr = nl80211_parse(msg); 571 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1]; 572 struct nlattr *mgrp; 573 int mgrpidx; 574 575 if (!attr[CTRL_ATTR_MCAST_GROUPS]) 576 return NL_SKIP; 577 578 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx) 579 { 580 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX, 581 nla_data(mgrp), nla_len(mgrp), NULL); 582 583 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] && 584 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] && 585 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]), 586 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]))) 587 { 588 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]); 589 break; 590 } 591 } 592 593 return NL_SKIP; 594 } 595 596 static int nl80211_subscribe(const char *family, const char *group) 597 { 598 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT }; 599 struct nl80211_msg_conveyor *req; 600 int err; 601 602 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0); 603 if (req) 604 { 605 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family); 606 err = nl80211_send(req, nl80211_subscribe_cb, &cv); 607 608 if (err) 609 return err; 610 611 return nl_socket_add_membership(nls->nl_sock, cv.id); 612 613 nla_put_failure: 614 nl80211_free(req); 615 } 616 617 return -ENOMEM; 618 } 619 620 621 static int nl80211_wait_cb(struct nl_msg *msg, void *arg) 622 { 623 struct nl80211_event_conveyor *cv = arg; 624 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 625 626 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32))) 627 cv->recv = gnlh->cmd; 628 629 return NL_SKIP; 630 } 631 632 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg) 633 { 634 return NL_OK; 635 } 636 637 static int __nl80211_wait(const char *family, const char *group, ...) 638 { 639 struct nl80211_event_conveyor cv = { }; 640 struct nl_cb *cb; 641 int err = 0; 642 int cmd; 643 va_list ap; 644 645 if (nl80211_subscribe(family, group)) 646 return -ENOENT; 647 648 cb = nl_cb_alloc(NL_CB_DEFAULT); 649 650 if (!cb) 651 return -ENOMEM; 652 653 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err); 654 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL); 655 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv ); 656 657 va_start(ap, group); 658 659 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int)) 660 cv.wait[cmd / 32] |= (1 << (cmd % 32)); 661 662 va_end(ap); 663 664 while (!cv.recv && !err) 665 nl_recvmsgs(nls->nl_sock, cb); 666 667 nl_cb_put(cb); 668 669 return err; 670 } 671 672 #define nl80211_wait(family, group, ...) \ 673 __nl80211_wait(family, group, __VA_ARGS__, 0) 674 675 /* This is linux's ieee80211_freq_khz_to_channel() which is: 676 * SPDX-License-Identifier: GPL-2.0 677 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> 678 * Copyright 2013-2014 Intel Mobile Communications GmbH 679 * Copyright 2017 Intel Deutschland GmbH 680 * Copyright (C) 2018-2022 Intel Corporation 681 */ 682 static int nl80211_freq2channel(int freq) 683 { 684 if (freq == 2484) 685 return 14; 686 else if (freq < 2484) 687 return (freq - 2407) / 5; 688 else if (freq >= 4910 && freq <= 4980) 689 return (freq - 4000) / 5; 690 else if (freq < 5925) 691 return (freq - 5000) / 5; 692 else if (freq == 5935) 693 return 2; 694 else if (freq <= 45000) /* DMG band lower limit */ 695 /* see 802.11ax D6.1 27.3.22.2 */ 696 return (freq - 5950) / 5; 697 else if (freq >= 58320 && freq <= 70200) 698 return (freq - 56160) / 2160; 699 else 700 return 0; 701 } 702 703 /* This is linux's ieee80211_channel_to_freq_khz() which is: 704 * SPDX-License-Identifier: GPL-2.0 705 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> 706 * Copyright 2013-2014 Intel Mobile Communications GmbH 707 * Copyright 2017 Intel Deutschland GmbH 708 * Copyright (C) 2018-2022 Intel Corporation 709 */ 710 static int nl80211_channel2freq(int channel, const char *band, bool ax) 711 { 712 if (channel < 1) 713 return 0; 714 715 if (!band || band[0] != 'a') 716 { 717 if (channel == 14) 718 return 2484; 719 else if (channel < 14) 720 return (channel * 5) + 2407; 721 } 722 else if (strcmp(band, "ad") == 0) 723 { 724 if (channel < 7) 725 return 56160 + 2160 * channel; 726 } 727 else if (ax) 728 { 729 if (channel == 2) 730 return 5935; 731 if (channel < 233) 732 return (channel * 5) + 5950; 733 } 734 else 735 { 736 if (channel >= 182 && channel <= 196) 737 return (channel * 5) + 4000; 738 else 739 return (channel * 5) + 5000; 740 } 741 742 return 0; 743 } 744 745 static uint8_t nl80211_freq2band(int freq) 746 { 747 if (freq >= 2412 && freq <= 2484) 748 return IWINFO_BAND_24; 749 else if (freq >= 5160 && freq <= 5885) 750 return IWINFO_BAND_5; 751 else if (freq >= 5925 && freq <= 7125) 752 return IWINFO_BAND_6; 753 else if (freq >= 58320 && freq <= 69120) 754 return IWINFO_BAND_60; 755 756 return 0; 757 } 758 759 static int nl80211_phyname_cb(struct nl_msg *msg, void *arg) 760 { 761 char *buf = arg; 762 struct nlattr **attr = nl80211_parse(msg); 763 764 if (attr[NL80211_ATTR_WIPHY_NAME]) 765 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]), 766 nla_len(attr[NL80211_ATTR_WIPHY_NAME])); 767 else 768 buf[0] = 0; 769 770 return NL_SKIP; 771 } 772 773 static char * nl80211_ifname2phy(const char *ifname) 774 { 775 static char phy[32] = { 0 }; 776 777 memset(phy, 0, sizeof(phy)); 778 779 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 780 nl80211_phyname_cb, phy); 781 782 return phy[0] ? phy : NULL; 783 } 784 785 static char * nl80211_phyidx2name(unsigned int idx) 786 { 787 struct nl80211_msg_conveyor *cv; 788 static char phy[32] = { 0 }; 789 790 if (nl80211_init() < 0) 791 return NULL; 792 793 cv = nl80211_new(nls->nl80211, NL80211_CMD_GET_WIPHY, 0); 794 if (!cv) 795 return NULL; 796 797 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, idx); 798 799 memset(phy, 0, sizeof(phy)); 800 nl80211_send(cv, nl80211_phyname_cb, phy); 801 802 return phy[0] ? phy : NULL; 803 804 nla_put_failure: 805 return NULL; 806 } 807 808 static char * nl80211_phy2ifname(const char *ifname) 809 { 810 int ifidx = -1, cifidx, lmode = 1, clmode, phyidx; 811 char buffer[512]; 812 static char nif[IFNAMSIZ] = { 0 }; 813 DIR *d; 814 struct dirent *e; 815 816 /* Only accept phy name in the form of phy%d or radio%d */ 817 if (!ifname) 818 return NULL; 819 820 phyidx = nl80211_phy_idx_from_phy(ifname); 821 if (phyidx < 0) 822 phyidx = nl80211_phy_idx_from_uci(ifname);; 823 if (phyidx < 0) 824 return NULL; 825 826 memset(nif, 0, sizeof(nif)); 827 828 snprintf(buffer, sizeof(buffer), 829 "/sys/class/ieee80211/phy%d/device/net", phyidx); 830 831 if ((d = opendir(buffer)) != NULL) 832 { 833 while ((e = readdir(d)) != NULL) 834 { 835 snprintf(buffer, sizeof(buffer), 836 "/sys/class/net/%s/ifindex", e->d_name); 837 cifidx = nl80211_readint(buffer); 838 839 if (cifidx < 0) 840 continue; 841 842 snprintf(buffer, sizeof(buffer), 843 "/sys/class/net/%s/link_mode", e->d_name); 844 clmode = nl80211_readint(buffer); 845 846 /* prefer non-supplicant-based devices */ 847 if ((ifidx < 0) || (cifidx < ifidx) || ((lmode == 1) && (clmode != 1))) 848 { 849 ifidx = cifidx; 850 lmode = clmode; 851 strncpy(nif, e->d_name, sizeof(nif) - 1); 852 } 853 } 854 855 closedir(d); 856 } 857 858 return nif[0] ? nif : NULL; 859 } 860 861 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg) 862 { 863 int *mode = arg; 864 struct nlattr **tb = nl80211_parse(msg); 865 const int ifmodes[NL80211_IFTYPE_MAX + 1] = { 866 IWINFO_OPMODE_UNKNOWN, /* unspecified */ 867 IWINFO_OPMODE_ADHOC, /* IBSS */ 868 IWINFO_OPMODE_CLIENT, /* managed */ 869 IWINFO_OPMODE_MASTER, /* AP */ 870 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */ 871 IWINFO_OPMODE_WDS, /* WDS */ 872 IWINFO_OPMODE_MONITOR, /* monitor */ 873 IWINFO_OPMODE_MESHPOINT, /* mesh point */ 874 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */ 875 IWINFO_OPMODE_P2P_GO, /* P2P-GO */ 876 }; 877 878 if (tb[NL80211_ATTR_IFTYPE]) 879 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])]; 880 881 return NL_SKIP; 882 } 883 884 885 static int nl80211_get_mode(const char *ifname, int *buf) 886 { 887 char *res; 888 889 *buf = IWINFO_OPMODE_UNKNOWN; 890 891 res = nl80211_phy2ifname(ifname); 892 893 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 894 nl80211_get_mode_cb, buf); 895 896 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0; 897 } 898 899 static int __nl80211_hostapd_query(const char *ifname, ...) 900 { 901 va_list ap, ap_cur; 902 char *phy, *search, *dest, *key, *val, buf[128]; 903 int len, mode, found = 0, match = 1; 904 FILE *fp; 905 906 if (nl80211_get_mode(ifname, &mode)) 907 return 0; 908 909 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN) 910 return 0; 911 912 phy = nl80211_ifname2phy(ifname); 913 914 if (!phy) 915 return 0; 916 917 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy); 918 fp = fopen(buf, "r"); 919 920 if (!fp) 921 return 0; 922 923 va_start(ap, ifname); 924 925 /* clear all destination buffers */ 926 va_copy(ap_cur, ap); 927 928 while ((search = va_arg(ap_cur, char *)) != NULL) 929 { 930 dest = va_arg(ap_cur, char *); 931 len = va_arg(ap_cur, int); 932 933 memset(dest, 0, len); 934 } 935 936 va_end(ap_cur); 937 938 /* iterate applicable lines and copy found values into dest buffers */ 939 while (fgets(buf, sizeof(buf), fp)) 940 { 941 key = strtok(buf, " =\t\n"); 942 val = strtok(NULL, "\n"); 943 944 if (!key || !val || !*key || *key == '#') 945 continue; 946 947 if (!strcmp(key, "interface") || !strcmp(key, "bss")) 948 match = !strcmp(ifname, val); 949 950 if (!match) 951 continue; 952 953 va_copy(ap_cur, ap); 954 955 while ((search = va_arg(ap_cur, char *)) != NULL) 956 { 957 dest = va_arg(ap_cur, char *); 958 len = va_arg(ap_cur, int); 959 960 if (!strcmp(search, key)) 961 { 962 strncpy(dest, val, len - 1); 963 found++; 964 break; 965 } 966 } 967 968 va_end(ap_cur); 969 } 970 971 fclose(fp); 972 973 va_end(ap); 974 975 return found; 976 } 977 978 #define nl80211_hostapd_query(ifname, ...) \ 979 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL) 980 981 982 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen) 983 { 984 fd_set rfds; 985 struct timeval tv = { 0, 256000 }; 986 987 FD_ZERO(&rfds); 988 FD_SET(sock, &rfds); 989 990 memset(buf, 0, blen); 991 992 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0) 993 return -1; 994 995 if (!FD_ISSET(sock, &rfds)) 996 return -1; 997 998 return recv(sock, buf, blen - 1, 0); 999 } 1000 1001 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local) 1002 { 1003 struct sockaddr_un remote = { 0 }; 1004 size_t remote_length, local_length; 1005 1006 int sock = socket(PF_UNIX, SOCK_DGRAM, 0); 1007 if (sock < 0) 1008 return sock; 1009 1010 remote.sun_family = AF_UNIX; 1011 remote_length = sizeof(remote.sun_family) + 1012 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname); 1013 1014 /* Set client socket file permissions so that bind() creates the client 1015 * socket with these permissions and there is no need to try to change 1016 * them with chmod() after bind() which would have potential issues with 1017 * race conditions. These permissions are needed to make sure the server 1018 * side (wpa_supplicant or hostapd) can reply to the control interface 1019 * messages. 1020 * 1021 * The lchown() calls below after bind() are also part of the needed 1022 * operations to allow the response to go through. Those are using the 1023 * no-deference-symlinks version to avoid races. */ 1024 fchmod(sock, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); 1025 1026 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0) 1027 { 1028 close(sock); 1029 return -1; 1030 } 1031 1032 if (connect(sock, (struct sockaddr *)&remote, remote_length)) 1033 { 1034 close(sock); 1035 return -1; 1036 } 1037 1038 local->sun_family = AF_UNIX; 1039 local_length = sizeof(local->sun_family) + 1040 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid()); 1041 1042 if (bind(sock, (struct sockaddr *)local, local_length) < 0) 1043 { 1044 close(sock); 1045 return -1; 1046 } 1047 1048 /* Set group even if we do not have privileges to change owner */ 1049 lchown(local->sun_path, -1, 101); 1050 lchown(local->sun_path, 101, 101); 1051 1052 return sock; 1053 } 1054 1055 static int __nl80211_wpactl_query(const char *ifname, ...) 1056 { 1057 va_list ap, ap_cur; 1058 struct sockaddr_un local = { 0 }; 1059 int len, mode, found = 0, sock = -1; 1060 char *search, *dest, *key, *val, *line, *pos, buf[512]; 1061 1062 if (nl80211_get_mode(ifname, &mode)) 1063 return 0; 1064 1065 if (mode != IWINFO_OPMODE_CLIENT && 1066 mode != IWINFO_OPMODE_ADHOC && 1067 mode != IWINFO_OPMODE_MESHPOINT) 1068 return 0; 1069 1070 sock = nl80211_wpactl_connect(ifname, &local); 1071 1072 if (sock < 0) 1073 return 0; 1074 1075 va_start(ap, ifname); 1076 1077 /* clear all destination buffers */ 1078 va_copy(ap_cur, ap); 1079 1080 while ((search = va_arg(ap_cur, char *)) != NULL) 1081 { 1082 dest = va_arg(ap_cur, char *); 1083 len = va_arg(ap_cur, int); 1084 1085 memset(dest, 0, len); 1086 } 1087 1088 va_end(ap_cur); 1089 1090 send(sock, "STATUS", 6, 0); 1091 1092 while (true) 1093 { 1094 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0) 1095 break; 1096 1097 if (buf[0] == '<') 1098 continue; 1099 1100 for (line = strtok_r(buf, "\n", &pos); 1101 line != NULL; 1102 line = strtok_r(NULL, "\n", &pos)) 1103 { 1104 key = strtok(line, "="); 1105 val = strtok(NULL, "\n"); 1106 1107 if (!key || !val) 1108 continue; 1109 1110 va_copy(ap_cur, ap); 1111 1112 while ((search = va_arg(ap_cur, char *)) != NULL) 1113 { 1114 dest = va_arg(ap_cur, char *); 1115 len = va_arg(ap_cur, int); 1116 1117 if (!strcmp(search, key)) 1118 { 1119 strncpy(dest, val, len - 1); 1120 found++; 1121 break; 1122 } 1123 } 1124 1125 va_end(ap_cur); 1126 } 1127 1128 break; 1129 } 1130 1131 va_end(ap); 1132 1133 close(sock); 1134 unlink(local.sun_path); 1135 1136 return found; 1137 } 1138 1139 #define nl80211_wpactl_query(ifname, ...) \ 1140 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL) 1141 1142 1143 static char * nl80211_ifadd(const char *ifname) 1144 { 1145 char path[PATH_MAX]; 1146 static char nif[IFNAMSIZ] = { 0 }; 1147 struct nl80211_msg_conveyor *req; 1148 FILE *sysfs; 1149 1150 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0); 1151 if (req) 1152 { 1153 snprintf(nif, sizeof(nif), "tmp.%s", ifname); 1154 1155 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif); 1156 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION); 1157 1158 nl80211_send(req, NULL, NULL); 1159 1160 snprintf(path, sizeof(path) - 1, 1161 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif); 1162 1163 if ((sysfs = fopen(path, "w")) != NULL) 1164 { 1165 fwrite("\n", 1, 2, sysfs); 1166 fclose(sysfs); 1167 } 1168 1169 return nif; 1170 1171 nla_put_failure: 1172 nl80211_free(req); 1173 } 1174 1175 return NULL; 1176 } 1177 1178 static void nl80211_ifdel(const char *ifname) 1179 { 1180 struct nl80211_msg_conveyor *req; 1181 1182 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0); 1183 if (req) 1184 { 1185 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname); 1186 1187 nl80211_send(req, NULL, NULL); 1188 return; 1189 1190 nla_put_failure: 1191 nl80211_free(req); 1192 } 1193 } 1194 1195 static void nl80211_hostapd_hup(const char *ifname) 1196 { 1197 int fd, pid = 0; 1198 char buf[32]; 1199 char *phy = nl80211_ifname2phy(ifname); 1200 1201 if (phy) 1202 { 1203 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy); 1204 if ((fd = open(buf, O_RDONLY)) >= 0) 1205 { 1206 if (read(fd, buf, sizeof(buf)) > 0) 1207 pid = atoi(buf); 1208 1209 close(fd); 1210 } 1211 1212 if (pid > 0) 1213 kill(pid, 1); 1214 } 1215 } 1216 1217 1218 static int nl80211_probe(const char *ifname) 1219 { 1220 return !!nl80211_ifname2phy(ifname); 1221 } 1222 1223 struct nl80211_ssid_bssid { 1224 unsigned char *ssid; 1225 unsigned char bssid[7]; 1226 }; 1227 1228 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg) 1229 { 1230 struct nl80211_ssid_bssid *sb = arg; 1231 struct nlattr **tb = nl80211_parse(msg); 1232 1233 if (tb[NL80211_ATTR_MAC]) { 1234 sb->bssid[0] = 1; 1235 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]), 1236 sizeof(sb->bssid) - 1); 1237 } 1238 1239 return NL_SKIP; 1240 } 1241 1242 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg) 1243 { 1244 int ielen; 1245 unsigned char *ie; 1246 struct nl80211_ssid_bssid *sb = arg; 1247 struct nlattr **tb = nl80211_parse(msg); 1248 struct nlattr *bss[NL80211_BSS_MAX + 1]; 1249 1250 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1251 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 1252 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1253 }; 1254 1255 if (!tb[NL80211_ATTR_BSS] || 1256 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 1257 bss_policy) || 1258 !bss[NL80211_BSS_BSSID] || 1259 !bss[NL80211_BSS_STATUS] || 1260 !bss[NL80211_BSS_INFORMATION_ELEMENTS]) 1261 { 1262 return NL_SKIP; 1263 } 1264 1265 switch (nla_get_u32(bss[NL80211_BSS_STATUS])) 1266 { 1267 case NL80211_BSS_STATUS_ASSOCIATED: 1268 case NL80211_BSS_STATUS_AUTHENTICATED: 1269 case NL80211_BSS_STATUS_IBSS_JOINED: 1270 1271 if (sb->ssid) 1272 { 1273 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1274 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1275 1276 while (ielen >= 2 && ielen >= ie[1]) 1277 { 1278 if (ie[0] == 0) 1279 { 1280 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE)); 1281 return NL_SKIP; 1282 } 1283 1284 ielen -= ie[1] + 2; 1285 ie += ie[1] + 2; 1286 } 1287 } 1288 else 1289 { 1290 sb->bssid[0] = 1; 1291 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6); 1292 return NL_SKIP; 1293 } 1294 1295 default: 1296 return NL_SKIP; 1297 } 1298 } 1299 1300 static int nl80211_get_ssid(const char *ifname, char *buf) 1301 { 1302 char *res; 1303 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf }; 1304 1305 /* try to find ssid from scan dump results */ 1306 res = nl80211_phy2ifname(ifname); 1307 sb.ssid[0] = 0; 1308 1309 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1310 nl80211_get_ssid_bssid_cb, &sb); 1311 1312 /* failed, try to find from hostapd info */ 1313 if (sb.ssid[0] == 0) 1314 nl80211_hostapd_query(ifname, "ssid", sb.ssid, 1315 IWINFO_ESSID_MAX_SIZE + 1); 1316 1317 /* failed, try to obtain Mesh ID */ 1318 if (sb.ssid[0] == 0) 1319 iwinfo_ubus_query(res ? res : ifname, "mesh_id", 1320 buf, IWINFO_ESSID_MAX_SIZE + 1); 1321 1322 return (sb.ssid[0] == 0) ? -1 : 0; 1323 } 1324 1325 static int nl80211_get_bssid(const char *ifname, char *buf) 1326 { 1327 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")]; 1328 struct nl80211_ssid_bssid sb = { }; 1329 1330 res = nl80211_phy2ifname(ifname); 1331 1332 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */ 1333 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1334 nl80211_get_macaddr_cb, &sb); 1335 1336 /* failed, try to find bssid from scan dump results */ 1337 if (sb.bssid[0] == 0) 1338 nl80211_request(res ? res : ifname, 1339 NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1340 nl80211_get_ssid_bssid_cb, &sb); 1341 1342 /* failed, try to find mac from hostapd info */ 1343 if ((sb.bssid[0] == 0) && 1344 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid))) 1345 { 1346 sb.bssid[0] = 1; 1347 sb.bssid[1] = strtol(&bssid[0], NULL, 16); 1348 sb.bssid[2] = strtol(&bssid[3], NULL, 16); 1349 sb.bssid[3] = strtol(&bssid[6], NULL, 16); 1350 sb.bssid[4] = strtol(&bssid[9], NULL, 16); 1351 sb.bssid[5] = strtol(&bssid[12], NULL, 16); 1352 sb.bssid[6] = strtol(&bssid[15], NULL, 16); 1353 } 1354 1355 if (sb.bssid[0]) 1356 { 1357 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", 1358 sb.bssid[1], sb.bssid[2], sb.bssid[3], 1359 sb.bssid[4], sb.bssid[5], sb.bssid[6]); 1360 1361 return 0; 1362 } 1363 1364 return -1; 1365 } 1366 1367 1368 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg) 1369 { 1370 int *freq = arg; 1371 struct nlattr **attr = nl80211_parse(msg); 1372 struct nlattr *binfo[NL80211_BSS_MAX + 1]; 1373 1374 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1375 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 1376 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1377 }; 1378 1379 if (attr[NL80211_ATTR_BSS] && 1380 !nla_parse_nested(binfo, NL80211_BSS_MAX, 1381 attr[NL80211_ATTR_BSS], bss_policy)) 1382 { 1383 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY]) 1384 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]); 1385 } 1386 1387 return NL_SKIP; 1388 } 1389 1390 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg) 1391 { 1392 int *freq = arg; 1393 struct nlattr **tb = nl80211_parse(msg); 1394 1395 if (tb[NL80211_ATTR_WIPHY_FREQ]) 1396 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]); 1397 1398 return NL_SKIP; 1399 } 1400 1401 static int nl80211_get_frequency(const char *ifname, int *buf) 1402 { 1403 char *res, channel[4] = { 0 }, hwmode[3] = { 0 }, ax[2] = { 0 }; 1404 1405 /* try to find frequency from interface info */ 1406 res = nl80211_phy2ifname(ifname); 1407 *buf = 0; 1408 1409 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1410 nl80211_get_frequency_info_cb, buf); 1411 1412 /* failed, try to find frequency from hostapd info */ 1413 if ((*buf == 0) && 1414 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode), 1415 "channel", channel, sizeof(channel), 1416 "ieee80211ax", ax, sizeof(ax)) >= 2) 1417 { 1418 *buf = nl80211_channel2freq(atoi(channel), hwmode, ax[0] == '1'); 1419 } 1420 1421 /* failed, try to find frequency from scan results */ 1422 if (*buf == 0) 1423 { 1424 res = nl80211_phy2ifname(ifname); 1425 1426 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1427 nl80211_get_frequency_scan_cb, buf); 1428 } 1429 1430 return (*buf == 0) ? -1 : 0; 1431 } 1432 1433 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg) 1434 { 1435 int *freq = arg; 1436 struct nlattr **tb = nl80211_parse(msg); 1437 1438 if (tb[NL80211_ATTR_CENTER_FREQ1]) 1439 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]); 1440 1441 return NL_SKIP; 1442 } 1443 1444 static int nl80211_get_center_freq1(const char *ifname, int *buf) 1445 { 1446 char *res; 1447 1448 /* try to find frequency from interface info */ 1449 res = nl80211_phy2ifname(ifname); 1450 *buf = 0; 1451 1452 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1453 nl80211_get_center_freq1_cb, buf); 1454 1455 return (*buf == 0) ? -1 : 0; 1456 } 1457 1458 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg) 1459 { 1460 int *freq = arg; 1461 struct nlattr **tb = nl80211_parse(msg); 1462 1463 if (tb[NL80211_ATTR_CENTER_FREQ2]) 1464 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]); 1465 1466 return NL_SKIP; 1467 } 1468 1469 static int nl80211_get_center_freq2(const char *ifname, int *buf) 1470 { 1471 char *res; 1472 1473 /* try to find frequency from interface info */ 1474 res = nl80211_phy2ifname(ifname); 1475 *buf = 0; 1476 1477 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1478 nl80211_get_center_freq2_cb, buf); 1479 1480 return (*buf == 0) ? -1 : 0; 1481 } 1482 1483 static int nl80211_get_channel(const char *ifname, int *buf) 1484 { 1485 if (!nl80211_get_frequency(ifname, buf)) 1486 { 1487 *buf = nl80211_freq2channel(*buf); 1488 return 0; 1489 } 1490 1491 return -1; 1492 } 1493 1494 static int nl80211_get_center_chan1(const char *ifname, int *buf) 1495 { 1496 if (!nl80211_get_center_freq1(ifname, buf)) 1497 { 1498 *buf = nl80211_freq2channel(*buf); 1499 return 0; 1500 } 1501 1502 return -1; 1503 } 1504 1505 static int nl80211_get_center_chan2(const char *ifname, int *buf) 1506 { 1507 if (!nl80211_get_center_freq2(ifname, buf)) 1508 { 1509 *buf = nl80211_freq2channel(*buf); 1510 return 0; 1511 } 1512 1513 return -1; 1514 } 1515 1516 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg) 1517 { 1518 int *buf = arg; 1519 struct nlattr **tb = nl80211_parse(msg); 1520 1521 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]) 1522 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])); 1523 1524 return NL_SKIP; 1525 } 1526 1527 static int nl80211_get_txpower(const char *ifname, int *buf) 1528 { 1529 char *res; 1530 1531 res = nl80211_phy2ifname(ifname); 1532 *buf = 0; 1533 1534 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1535 nl80211_get_txpower_cb, buf)) 1536 return -1; 1537 1538 return 0; 1539 } 1540 1541 1542 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg) 1543 { 1544 int8_t dbm; 1545 int16_t mbit; 1546 struct nl80211_rssi_rate *rr = arg; 1547 struct nlattr **attr = nl80211_parse(msg); 1548 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 1549 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 1550 1551 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 1552 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 1553 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 1554 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 1555 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 1556 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 1557 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 1558 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 1559 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 1560 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 1561 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 1562 }; 1563 1564 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 1565 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 1566 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 1567 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 1568 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 1569 }; 1570 1571 if (attr[NL80211_ATTR_STA_INFO]) 1572 { 1573 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 1574 attr[NL80211_ATTR_STA_INFO], stats_policy)) 1575 { 1576 if (sinfo[NL80211_STA_INFO_SIGNAL]) 1577 { 1578 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 1579 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1); 1580 rr->rssi_samples++; 1581 } 1582 1583 if (sinfo[NL80211_STA_INFO_TX_BITRATE]) 1584 { 1585 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 1586 sinfo[NL80211_STA_INFO_TX_BITRATE], 1587 rate_policy)) 1588 { 1589 if (rinfo[NL80211_RATE_INFO_BITRATE]) 1590 { 1591 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]); 1592 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1); 1593 rr->rate_samples++; 1594 } 1595 } 1596 } 1597 } 1598 } 1599 1600 return NL_SKIP; 1601 } 1602 1603 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r) 1604 { 1605 DIR *d; 1606 struct dirent *de; 1607 1608 memset(r, 0, sizeof(*r)); 1609 1610 if ((d = opendir("/sys/class/net")) != NULL) 1611 { 1612 while ((de = readdir(d)) != NULL) 1613 { 1614 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 1615 (!de->d_name[strlen(ifname)] || 1616 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 1617 { 1618 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 1619 NLM_F_DUMP, nl80211_fill_signal_cb, r); 1620 } 1621 } 1622 1623 closedir(d); 1624 } 1625 } 1626 1627 static int nl80211_get_bitrate(const char *ifname, int *buf) 1628 { 1629 struct nl80211_rssi_rate rr; 1630 1631 nl80211_fill_signal(ifname, &rr); 1632 1633 if (rr.rate_samples) 1634 { 1635 *buf = (rr.rate * 100); 1636 return 0; 1637 } 1638 1639 return -1; 1640 } 1641 1642 static int nl80211_get_signal(const char *ifname, int *buf) 1643 { 1644 struct nl80211_rssi_rate rr; 1645 1646 nl80211_fill_signal(ifname, &rr); 1647 1648 if (rr.rssi_samples) 1649 { 1650 *buf = rr.rssi; 1651 return 0; 1652 } 1653 1654 return -1; 1655 } 1656 1657 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg) 1658 { 1659 int8_t *noise = arg; 1660 struct nlattr **tb = nl80211_parse(msg); 1661 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1]; 1662 1663 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = { 1664 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 1665 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 1666 }; 1667 1668 if (!tb[NL80211_ATTR_SURVEY_INFO]) 1669 return NL_SKIP; 1670 1671 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX, 1672 tb[NL80211_ATTR_SURVEY_INFO], sp)) 1673 return NL_SKIP; 1674 1675 if (!si[NL80211_SURVEY_INFO_NOISE]) 1676 return NL_SKIP; 1677 1678 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE]) 1679 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]); 1680 1681 return NL_SKIP; 1682 } 1683 1684 1685 static int nl80211_get_noise(const char *ifname, int *buf) 1686 { 1687 int8_t noise = 0; 1688 1689 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP, 1690 nl80211_get_noise_cb, &noise)) 1691 goto out; 1692 1693 *buf = noise; 1694 return 0; 1695 1696 out: 1697 *buf = 0; 1698 return -1; 1699 } 1700 1701 static int nl80211_get_quality(const char *ifname, int *buf) 1702 { 1703 int signal; 1704 1705 if (!nl80211_get_signal(ifname, &signal)) 1706 { 1707 /* A positive signal level is usually just a quality 1708 * value, pass through as-is */ 1709 if (signal >= 0) 1710 { 1711 *buf = signal; 1712 } 1713 1714 /* The cfg80211 wext compat layer assumes a signal range 1715 * of -110 dBm to -40 dBm, the quality value is derived 1716 * by adding 110 to the signal level */ 1717 else 1718 { 1719 if (signal < -110) 1720 signal = -110; 1721 else if (signal > -40) 1722 signal = -40; 1723 1724 *buf = (signal + 110); 1725 } 1726 1727 return 0; 1728 } 1729 1730 return -1; 1731 } 1732 1733 static int nl80211_get_quality_max(const char *ifname, int *buf) 1734 { 1735 /* The cfg80211 wext compat layer assumes a maximum 1736 * quality of 70 */ 1737 *buf = 70; 1738 1739 return 0; 1740 } 1741 1742 static int nl80211_check_wepkey(const char *key) 1743 { 1744 if (key && *key) 1745 { 1746 switch (strlen(key)) 1747 { 1748 case 5: 1749 case 10: 1750 return IWINFO_CIPHER_WEP40; 1751 1752 case 13: 1753 case 26: 1754 return IWINFO_CIPHER_WEP104; 1755 } 1756 } 1757 1758 return 0; 1759 } 1760 1761 static struct { 1762 const char *match; 1763 int version; 1764 int suite; 1765 } wpa_key_mgmt_strings[] = { 1766 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x }, 1767 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x }, 1768 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x }, 1769 { "EAP-SHA384", 4, IWINFO_KMGMT_8021x }, 1770 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x }, 1771 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK }, 1772 { "NONE", 0, IWINFO_KMGMT_NONE }, 1773 { "None", 0, IWINFO_KMGMT_NONE }, 1774 { "PSK", 0, IWINFO_KMGMT_PSK }, 1775 { "EAP", 0, IWINFO_KMGMT_8021x }, 1776 { "SAE", 4, IWINFO_KMGMT_SAE }, 1777 { "OWE", 4, IWINFO_KMGMT_OWE } 1778 }; 1779 1780 static void parse_wpa_suites(const char *str, int defversion, 1781 uint8_t *versions, uint8_t *suites) 1782 { 1783 size_t l; 1784 int i, version; 1785 const char *p, *q, *m, *sep = " \t\n,-+/"; 1786 1787 for (p = str; *p; ) 1788 { 1789 q = p; 1790 1791 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++) 1792 { 1793 m = wpa_key_mgmt_strings[i].match; 1794 l = strlen(m); 1795 1796 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1797 { 1798 if (wpa_key_mgmt_strings[i].version != 0) 1799 version = wpa_key_mgmt_strings[i].version; 1800 else 1801 version = defversion; 1802 1803 *versions |= version; 1804 *suites |= wpa_key_mgmt_strings[i].suite; 1805 1806 q += l; 1807 break; 1808 } 1809 } 1810 1811 if (q == p) 1812 q += strcspn(q, sep); 1813 1814 p = q + strspn(q, sep); 1815 } 1816 } 1817 1818 static struct { 1819 const char *match; 1820 int cipher; 1821 } wpa_cipher_strings[] = { 1822 { "WEP-104", IWINFO_CIPHER_WEP104 }, 1823 { "WEP-40", IWINFO_CIPHER_WEP40 }, 1824 { "NONE", IWINFO_CIPHER_NONE }, 1825 { "TKIP", IWINFO_CIPHER_TKIP }, 1826 { "CCMP-256",IWINFO_CIPHER_CCMP256 }, 1827 { "CCMP", IWINFO_CIPHER_CCMP }, 1828 { "GCMP-256",IWINFO_CIPHER_GCMP256 }, 1829 { "GCMP", IWINFO_CIPHER_GCMP } 1830 }; 1831 1832 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers) 1833 { 1834 int i; 1835 size_t l; 1836 const char *m, *p, *q, *sep = " \t\n,-+/"; 1837 1838 for (p = str; *p; ) 1839 { 1840 q = p; 1841 1842 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++) 1843 { 1844 m = wpa_cipher_strings[i].match; 1845 l = strlen(m); 1846 1847 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1848 { 1849 *ciphers |= wpa_cipher_strings[i].cipher; 1850 1851 q += l; 1852 break; 1853 } 1854 } 1855 1856 if (q == p) 1857 q += strcspn(q, sep); 1858 1859 p = q + strspn(q, sep); 1860 } 1861 } 1862 1863 static int nl80211_get_encryption(const char *ifname, char *buf) 1864 { 1865 char *p; 1866 int opmode; 1867 uint8_t wpa_version = 0; 1868 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16]; 1869 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27]; 1870 char mode[16]; 1871 1872 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf; 1873 1874 /* WPA supplicant */ 1875 if (nl80211_wpactl_query(ifname, 1876 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise), 1877 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise), 1878 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1879 "mode", mode, sizeof(mode))) 1880 { 1881 /* WEP or Open */ 1882 if (!strcmp(wpa_key_mgmt, "NONE")) 1883 { 1884 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1885 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1886 1887 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) { 1888 c->enabled = 1; 1889 c->auth_suites = IWINFO_KMGMT_NONE; 1890 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 1891 } 1892 else { 1893 c->pair_ciphers = 0; 1894 c->group_ciphers = 0; 1895 } 1896 } 1897 1898 /* MESH with SAE */ 1899 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN")) 1900 { 1901 c->enabled = 1; 1902 c->wpa_version = 4; 1903 c->auth_suites = IWINFO_KMGMT_SAE; 1904 c->pair_ciphers = IWINFO_CIPHER_CCMP; 1905 c->group_ciphers = IWINFO_CIPHER_CCMP; 1906 } 1907 1908 /* WPA */ 1909 else 1910 { 1911 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1912 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1913 1914 p = wpa_key_mgmt; 1915 1916 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5)) 1917 { 1918 p += 5; 1919 wpa_version = 2; 1920 } 1921 else if (!strncmp(p, "WPA-", 4)) 1922 { 1923 p += 4; 1924 wpa_version = 1; 1925 } 1926 1927 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites); 1928 1929 c->enabled = !!(c->wpa_version && c->auth_suites); 1930 } 1931 1932 return 0; 1933 } 1934 1935 /* Hostapd */ 1936 else if (nl80211_hostapd_query(ifname, 1937 "wpa", wpa, sizeof(wpa), 1938 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1939 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise), 1940 "auth_algs", auth_algs, sizeof(auth_algs), 1941 "wep_key0", wep_key0, sizeof(wep_key0), 1942 "wep_key1", wep_key1, sizeof(wep_key1), 1943 "wep_key2", wep_key2, sizeof(wep_key2), 1944 "wep_key3", wep_key3, sizeof(wep_key3))) 1945 { 1946 c->wpa_version = 0; 1947 1948 if (wpa_key_mgmt[0]) 1949 { 1950 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t")) 1951 { 1952 if (!strncmp(p, "WPA-", 4)) 1953 p += 4; 1954 1955 if (!strncmp(p, "FT-", 3)) 1956 p += 3; 1957 1958 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites); 1959 } 1960 1961 c->enabled = c->wpa_version ? 1 : 0; 1962 } 1963 1964 if (wpa_pairwise[0]) 1965 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1966 1967 if (auth_algs[0]) 1968 { 1969 switch (atoi(auth_algs)) 1970 { 1971 case 1: 1972 c->auth_algs |= IWINFO_AUTH_OPEN; 1973 break; 1974 1975 case 2: 1976 c->auth_algs |= IWINFO_AUTH_SHARED; 1977 break; 1978 1979 case 3: 1980 c->auth_algs |= IWINFO_AUTH_OPEN; 1981 c->auth_algs |= IWINFO_AUTH_SHARED; 1982 break; 1983 } 1984 1985 c->pair_ciphers |= nl80211_check_wepkey(wep_key0); 1986 c->pair_ciphers |= nl80211_check_wepkey(wep_key1); 1987 c->pair_ciphers |= nl80211_check_wepkey(wep_key2); 1988 c->pair_ciphers |= nl80211_check_wepkey(wep_key3); 1989 1990 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0; 1991 } 1992 1993 c->group_ciphers = c->pair_ciphers; 1994 1995 return 0; 1996 } 1997 1998 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */ 1999 else if (!nl80211_get_mode(ifname, &opmode) && 2000 (opmode == IWINFO_OPMODE_ADHOC || 2001 opmode == IWINFO_OPMODE_MESHPOINT)) 2002 { 2003 c->enabled = 0; 2004 2005 return 0; 2006 } 2007 2008 2009 return -1; 2010 } 2011 2012 static int nl80211_get_phyname(const char *ifname, char *buf) 2013 { 2014 const char *name; 2015 2016 name = nl80211_ifname2phy(ifname); 2017 2018 if (name) 2019 { 2020 strcpy(buf, name); 2021 return 0; 2022 } 2023 else if ((name = nl80211_phy2ifname(ifname)) != NULL) 2024 { 2025 name = nl80211_ifname2phy(name); 2026 2027 if (name) 2028 { 2029 strcpy(buf, ifname); 2030 return 0; 2031 } 2032 } 2033 2034 return -1; 2035 } 2036 2037 2038 static void nl80211_parse_rateinfo(struct nlattr **ri, 2039 struct iwinfo_rate_entry *re) 2040 { 2041 if (ri[NL80211_RATE_INFO_BITRATE32]) 2042 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100; 2043 else if (ri[NL80211_RATE_INFO_BITRATE]) 2044 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100; 2045 2046 if (ri[NL80211_RATE_INFO_HE_MCS]) 2047 { 2048 re->is_he = 1; 2049 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]); 2050 2051 if (ri[NL80211_RATE_INFO_HE_NSS]) 2052 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]); 2053 if (ri[NL80211_RATE_INFO_HE_GI]) 2054 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]); 2055 if (ri[NL80211_RATE_INFO_HE_DCM]) 2056 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]); 2057 } 2058 else if (ri[NL80211_RATE_INFO_VHT_MCS]) 2059 { 2060 re->is_vht = 1; 2061 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]); 2062 2063 if (ri[NL80211_RATE_INFO_VHT_NSS]) 2064 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]); 2065 } 2066 else if (ri[NL80211_RATE_INFO_MCS]) 2067 { 2068 re->is_ht = 1; 2069 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]); 2070 } 2071 2072 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH]) 2073 re->mhz = 5; 2074 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH]) 2075 re->mhz = 10; 2076 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH]) 2077 re->mhz = 40; 2078 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH]) 2079 re->mhz = 80; 2080 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] || 2081 ri[NL80211_RATE_INFO_160_MHZ_WIDTH]) 2082 re->mhz = 160; 2083 else 2084 re->mhz = 20; 2085 2086 if (ri[NL80211_RATE_INFO_SHORT_GI]) 2087 re->is_short_gi = 1; 2088 2089 re->is_40mhz = (re->mhz == 40); 2090 } 2091 2092 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg) 2093 { 2094 struct nl80211_array_buf *arr = arg; 2095 struct iwinfo_survey_entry *e = arr->buf; 2096 struct nlattr **attr = nl80211_parse(msg); 2097 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1]; 2098 int rc; 2099 2100 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = { 2101 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 2102 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 2103 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 }, 2104 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 }, 2105 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 }, 2106 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 }, 2107 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 }, 2108 }; 2109 2110 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX, 2111 attr[NL80211_ATTR_SURVEY_INFO], 2112 survey_policy); 2113 if (rc) 2114 return NL_SKIP; 2115 2116 /* advance to end of array */ 2117 e += arr->count; 2118 memset(e, 0, sizeof(*e)); 2119 2120 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY]) 2121 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]); 2122 2123 if (sinfo[NL80211_SURVEY_INFO_NOISE]) 2124 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]); 2125 2126 if (sinfo[NL80211_SURVEY_INFO_TIME]) 2127 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]); 2128 2129 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY]) 2130 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]); 2131 2132 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]) 2133 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]); 2134 2135 if (sinfo[NL80211_SURVEY_INFO_TIME_RX]) 2136 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]); 2137 2138 if (sinfo[NL80211_SURVEY_INFO_TIME_TX]) 2139 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]); 2140 2141 arr->count++; 2142 return NL_SKIP; 2143 } 2144 2145 2146 static void plink_state_to_str(char *dst, unsigned state) 2147 { 2148 switch (state) { 2149 case NL80211_PLINK_LISTEN: 2150 strcpy(dst, "LISTEN"); 2151 break; 2152 case NL80211_PLINK_OPN_SNT: 2153 strcpy(dst, "OPN_SNT"); 2154 break; 2155 case NL80211_PLINK_OPN_RCVD: 2156 strcpy(dst, "OPN_RCVD"); 2157 break; 2158 case NL80211_PLINK_CNF_RCVD: 2159 strcpy(dst, "CNF_RCVD"); 2160 break; 2161 case NL80211_PLINK_ESTAB: 2162 strcpy(dst, "ESTAB"); 2163 break; 2164 case NL80211_PLINK_HOLDING: 2165 strcpy(dst, "HOLDING"); 2166 break; 2167 case NL80211_PLINK_BLOCKED: 2168 strcpy(dst, "BLOCKED"); 2169 break; 2170 default: 2171 strcpy(dst, "UNKNOWN"); 2172 break; 2173 } 2174 } 2175 2176 static void power_mode_to_str(char *dst, struct nlattr *a) 2177 { 2178 enum nl80211_mesh_power_mode pm = nla_get_u32(a); 2179 2180 switch (pm) { 2181 case NL80211_MESH_POWER_ACTIVE: 2182 strcpy(dst, "ACTIVE"); 2183 break; 2184 case NL80211_MESH_POWER_LIGHT_SLEEP: 2185 strcpy(dst, "LIGHT SLEEP"); 2186 break; 2187 case NL80211_MESH_POWER_DEEP_SLEEP: 2188 strcpy(dst, "DEEP SLEEP"); 2189 break; 2190 default: 2191 strcpy(dst, "UNKNOWN"); 2192 break; 2193 } 2194 } 2195 2196 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg) 2197 { 2198 struct nl80211_array_buf *arr = arg; 2199 struct iwinfo_assoclist_entry *e = arr->buf; 2200 struct nlattr **attr = nl80211_parse(msg); 2201 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 2202 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 2203 struct nl80211_sta_flag_update *sta_flags; 2204 2205 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 2206 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 2207 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 2208 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 2209 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED }, 2210 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 2211 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 2212 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 }, 2213 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 2214 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 2215 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 }, 2216 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 }, 2217 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 }, 2218 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 }, 2219 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 }, 2220 [NL80211_STA_INFO_STA_FLAGS] = 2221 { .minlen = sizeof(struct nl80211_sta_flag_update) }, 2222 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 }, 2223 /* mesh */ 2224 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 2225 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 2226 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 2227 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 }, 2228 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 }, 2229 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 }, 2230 }; 2231 2232 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 2233 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 2234 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 2235 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 2236 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 2237 }; 2238 2239 /* advance to end of array */ 2240 e += arr->count; 2241 memset(e, 0, sizeof(*e)); 2242 2243 if (attr[NL80211_ATTR_MAC]) 2244 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6); 2245 2246 if (attr[NL80211_ATTR_STA_INFO] && 2247 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 2248 attr[NL80211_ATTR_STA_INFO], stats_policy)) 2249 { 2250 if (sinfo[NL80211_STA_INFO_SIGNAL]) 2251 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 2252 2253 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG]) 2254 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]); 2255 2256 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME]) 2257 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]); 2258 2259 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME]) 2260 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]); 2261 2262 if (sinfo[NL80211_STA_INFO_RX_PACKETS]) 2263 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]); 2264 2265 if (sinfo[NL80211_STA_INFO_TX_PACKETS]) 2266 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]); 2267 2268 if (sinfo[NL80211_STA_INFO_RX_BITRATE] && 2269 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2270 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy)) 2271 nl80211_parse_rateinfo(rinfo, &e->rx_rate); 2272 2273 if (sinfo[NL80211_STA_INFO_TX_BITRATE] && 2274 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2275 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy)) 2276 nl80211_parse_rateinfo(rinfo, &e->tx_rate); 2277 2278 if (sinfo[NL80211_STA_INFO_RX_BYTES]) 2279 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]); 2280 2281 if (sinfo[NL80211_STA_INFO_TX_BYTES]) 2282 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]); 2283 2284 if (sinfo[NL80211_STA_INFO_TX_RETRIES]) 2285 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]); 2286 2287 if (sinfo[NL80211_STA_INFO_TX_FAILED]) 2288 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]); 2289 2290 if (sinfo[NL80211_STA_INFO_T_OFFSET]) 2291 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]); 2292 2293 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC]) 2294 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]); 2295 2296 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]) 2297 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]); 2298 2299 /* mesh */ 2300 if (sinfo[NL80211_STA_INFO_LLID]) 2301 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]); 2302 2303 if (sinfo[NL80211_STA_INFO_PLID]) 2304 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]); 2305 2306 if (sinfo[NL80211_STA_INFO_PLINK_STATE]) 2307 plink_state_to_str(e->plink_state, 2308 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE])); 2309 2310 if (sinfo[NL80211_STA_INFO_LOCAL_PM]) 2311 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]); 2312 if (sinfo[NL80211_STA_INFO_PEER_PM]) 2313 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]); 2314 if (sinfo[NL80211_STA_INFO_NONPEER_PM]) 2315 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]); 2316 2317 /* Station flags */ 2318 if (sinfo[NL80211_STA_INFO_STA_FLAGS]) 2319 { 2320 sta_flags = (struct nl80211_sta_flag_update *) 2321 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]); 2322 2323 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) && 2324 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED)) 2325 e->is_authorized = 1; 2326 2327 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) && 2328 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) 2329 e->is_authenticated = 1; 2330 2331 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) && 2332 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) 2333 e->is_preamble_short = 1; 2334 2335 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) && 2336 sta_flags->set & BIT(NL80211_STA_FLAG_WME)) 2337 e->is_wme = 1; 2338 2339 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) && 2340 sta_flags->set & BIT(NL80211_STA_FLAG_MFP)) 2341 e->is_mfp = 1; 2342 2343 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) && 2344 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER)) 2345 e->is_tdls = 1; 2346 } 2347 } 2348 2349 e->noise = 0; /* filled in by caller */ 2350 arr->count++; 2351 2352 return NL_SKIP; 2353 } 2354 2355 static int nl80211_get_survey(const char *ifname, char *buf, int *len) 2356 { 2357 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2358 int rc; 2359 2360 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY, 2361 NLM_F_DUMP, nl80211_get_survey_cb, &arr); 2362 if (!rc) 2363 *len = (arr.count * sizeof(struct iwinfo_survey_entry)); 2364 else 2365 *len = 0; 2366 2367 return 0; 2368 } 2369 2370 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len) 2371 { 2372 DIR *d; 2373 int i, noise = 0; 2374 struct dirent *de; 2375 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2376 struct iwinfo_assoclist_entry *e; 2377 2378 if ((d = opendir("/sys/class/net")) != NULL) 2379 { 2380 while ((de = readdir(d)) != NULL) 2381 { 2382 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 2383 (!de->d_name[strlen(ifname)] || 2384 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 2385 { 2386 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 2387 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr); 2388 } 2389 } 2390 2391 closedir(d); 2392 2393 if (!nl80211_get_noise(ifname, &noise)) 2394 for (i = 0, e = arr.buf; i < arr.count; i++, e++) 2395 e->noise = noise; 2396 2397 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry)); 2398 return 0; 2399 } 2400 2401 return -1; 2402 } 2403 2404 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg) 2405 { 2406 int *dbm_max = arg; 2407 int ch_cur, ch_cmp, bands_remain, freqs_remain; 2408 2409 struct nlattr **attr = nl80211_parse(msg); 2410 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2411 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2412 struct nlattr *band, *freq; 2413 2414 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = { 2415 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 }, 2416 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG }, 2417 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG }, 2418 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG }, 2419 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG }, 2420 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 }, 2421 }; 2422 2423 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */ 2424 *dbm_max = -1; 2425 2426 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2427 { 2428 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), 2429 nla_len(band), NULL); 2430 2431 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 2432 { 2433 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2434 nla_data(freq), nla_len(freq), freq_policy); 2435 2436 ch_cmp = nl80211_freq2channel(nla_get_u32( 2437 freqs[NL80211_FREQUENCY_ATTR_FREQ])); 2438 2439 if ((!ch_cur || (ch_cmp == ch_cur)) && 2440 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) 2441 { 2442 *dbm_max = (int)(0.01 * nla_get_u32( 2443 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])); 2444 2445 break; 2446 } 2447 } 2448 } 2449 2450 return NL_SKIP; 2451 } 2452 2453 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len) 2454 { 2455 int err, ch_cur; 2456 int dbm_max = -1, dbm_cur, dbm_cnt; 2457 struct iwinfo_txpwrlist_entry entry; 2458 2459 if (nl80211_get_channel(ifname, &ch_cur)) 2460 ch_cur = 0; 2461 2462 /* initialize the value pointer with channel for callback */ 2463 dbm_max = ch_cur; 2464 2465 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 2466 nl80211_get_txpwrlist_cb, &dbm_max); 2467 2468 if (!err) 2469 { 2470 for (dbm_cur = 0, dbm_cnt = 0; 2471 dbm_cur < dbm_max; 2472 dbm_cur++, dbm_cnt++) 2473 { 2474 entry.dbm = dbm_cur; 2475 entry.mw = iwinfo_dbm2mw(dbm_cur); 2476 2477 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2478 } 2479 2480 entry.dbm = dbm_max; 2481 entry.mw = iwinfo_dbm2mw(dbm_max); 2482 2483 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2484 dbm_cnt++; 2485 2486 *len = dbm_cnt * sizeof(entry); 2487 return 0; 2488 } 2489 2490 return -1; 2491 } 2492 2493 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c) 2494 { 2495 int wpa_version = 0; 2496 char *p, *q, *proto, *suites; 2497 2498 c->enabled = 0; 2499 2500 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) { 2501 if (!strcmp(p, "WEP")) { 2502 c->enabled = 1; 2503 c->auth_suites = IWINFO_KMGMT_NONE; 2504 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2505 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2506 break; 2507 } 2508 2509 proto = strtok(p, "-"); 2510 suites = strtok(NULL, "]"); 2511 2512 if (!proto || !suites) 2513 continue; 2514 2515 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN")) 2516 wpa_version = 2; 2517 else if (!strcmp(proto, "WPA")) 2518 wpa_version = 1; 2519 else 2520 continue; 2521 2522 c->enabled = 1; 2523 2524 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites); 2525 parse_wpa_ciphers(suites, &c->pair_ciphers); 2526 } 2527 } 2528 2529 2530 struct nl80211_scanlist { 2531 struct iwinfo_scanlist_entry *e; 2532 int len; 2533 }; 2534 2535 2536 static void nl80211_get_scanlist_ie(struct nlattr **bss, 2537 struct iwinfo_scanlist_entry *e) 2538 { 2539 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2540 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2541 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; 2542 int len; 2543 2544 while (ielen >= 2 && ielen >= ie[1]) 2545 { 2546 switch (ie[0]) 2547 { 2548 case 0: /* SSID */ 2549 case 114: /* Mesh ID */ 2550 if (e->ssid[0] == 0) { 2551 len = min(ie[1], IWINFO_ESSID_MAX_SIZE); 2552 memcpy(e->ssid, ie + 2, len); 2553 e->ssid[len] = 0; 2554 } 2555 break; 2556 2557 case 48: /* RSN */ 2558 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1], 2559 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x); 2560 break; 2561 2562 case 221: /* Vendor */ 2563 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1) 2564 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4, 2565 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK); 2566 break; 2567 case 61: /* HT operation */ 2568 if (ie[1] >= 3) { 2569 e->ht_chan_info.primary_chan = ie[2]; 2570 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3; 2571 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2; 2572 } 2573 break; 2574 case 192: /* VHT operation */ 2575 if (ie[1] >= 3) { 2576 e->vht_chan_info.chan_width = ie[2]; 2577 e->vht_chan_info.center_chan_1 = ie[3]; 2578 e->vht_chan_info.center_chan_2 = ie[4]; 2579 } 2580 break; 2581 } 2582 2583 ielen -= ie[1] + 2; 2584 ie += ie[1] + 2; 2585 } 2586 } 2587 2588 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg) 2589 { 2590 int8_t rssi; 2591 uint16_t caps; 2592 2593 struct nl80211_scanlist *sl = arg; 2594 struct nlattr **tb = nl80211_parse(msg); 2595 struct nlattr *bss[NL80211_BSS_MAX + 1]; 2596 2597 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 2598 [NL80211_BSS_TSF] = { .type = NLA_U64 }, 2599 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 2600 [NL80211_BSS_BSSID] = { 0 }, 2601 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, 2602 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, 2603 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 2604 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, 2605 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, 2606 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 2607 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 }, 2608 [NL80211_BSS_BEACON_IES] = { 0 }, 2609 }; 2610 2611 if (!tb[NL80211_ATTR_BSS] || 2612 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 2613 bss_policy) || 2614 !bss[NL80211_BSS_BSSID]) 2615 { 2616 return NL_SKIP; 2617 } 2618 2619 if (bss[NL80211_BSS_CAPABILITY]) 2620 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); 2621 else 2622 caps = 0; 2623 2624 memset(sl->e, 0, sizeof(*sl->e)); 2625 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6); 2626 2627 if (caps & (1<<1)) 2628 sl->e->mode = IWINFO_OPMODE_ADHOC; 2629 else if (caps & (1<<0)) 2630 sl->e->mode = IWINFO_OPMODE_MASTER; 2631 else 2632 sl->e->mode = IWINFO_OPMODE_MESHPOINT; 2633 2634 if (caps & (1<<4)) 2635 sl->e->crypto.enabled = 1; 2636 2637 if (bss[NL80211_BSS_FREQUENCY]) 2638 { 2639 sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]); 2640 sl->e->band = nl80211_freq2band(sl->e->mhz); 2641 sl->e->channel = nl80211_freq2channel(sl->e->mhz); 2642 } 2643 2644 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) 2645 nl80211_get_scanlist_ie(bss, sl->e); 2646 2647 if (bss[NL80211_BSS_SIGNAL_MBM]) 2648 { 2649 sl->e->signal = 2650 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100); 2651 2652 rssi = sl->e->signal - 0x100; 2653 2654 if (rssi < -110) 2655 rssi = -110; 2656 else if (rssi > -40) 2657 rssi = -40; 2658 2659 sl->e->quality = (rssi + 110); 2660 sl->e->quality_max = 70; 2661 } 2662 2663 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version) 2664 { 2665 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2666 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2667 } 2668 2669 sl->e++; 2670 sl->len++; 2671 2672 return NL_SKIP; 2673 } 2674 2675 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len) 2676 { 2677 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf }; 2678 2679 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL)) 2680 goto out; 2681 2682 if (nl80211_wait("nl80211", "scan", 2683 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED)) 2684 goto out; 2685 2686 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 2687 nl80211_get_scanlist_cb, &sl)) 2688 goto out; 2689 2690 *len = sl.len * sizeof(struct iwinfo_scanlist_entry); 2691 return 0; 2692 2693 out: 2694 *len = 0; 2695 return -1; 2696 } 2697 2698 static int wpasupp_ssid_decode(const char *in, char *out, int outlen) 2699 { 2700 #define hex(x) \ 2701 (((x) >= 'a') ? ((x) - 'a' + 10) : \ 2702 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - ''))) 2703 2704 int len = 0; 2705 2706 while (*in) 2707 { 2708 if (len + 1 >= outlen) 2709 break; 2710 2711 switch (*in) 2712 { 2713 case '\\': 2714 in++; 2715 switch (*in) 2716 { 2717 case 'n': 2718 out[len++] = '\n'; in++; 2719 break; 2720 2721 case 'r': 2722 out[len++] = '\r'; in++; 2723 break; 2724 2725 case 't': 2726 out[len++] = '\t'; in++; 2727 break; 2728 2729 case 'e': 2730 out[len++] = '\033'; in++; 2731 break; 2732 2733 case 'x': 2734 if (isxdigit(*(in+1)) && isxdigit(*(in+2))) 2735 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2)); 2736 in += 3; 2737 break; 2738 2739 default: 2740 out[len++] = *in++; 2741 break; 2742 } 2743 break; 2744 2745 default: 2746 out[len++] = *in++; 2747 break; 2748 } 2749 } 2750 2751 if (outlen > len) 2752 out[len] = '\0'; 2753 2754 return len; 2755 } 2756 2757 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len) 2758 { 2759 int sock, qmax, rssi, tries, count = -1, ready = 0; 2760 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096]; 2761 struct sockaddr_un local = { 0 }; 2762 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf; 2763 2764 sock = nl80211_wpactl_connect(ifname, &local); 2765 2766 if (sock < 0) 2767 return sock; 2768 2769 send(sock, "ATTACH", 6, 0); 2770 send(sock, "SCAN", 4, 0); 2771 2772 /* 2773 * wait for scan results: 2774 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan 2775 * 72 channels at most. We'll also receive two "OK" messages acknowledging 2776 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra 2777 * time to process the results, so try 72 + 2 + 1 times. 2778 */ 2779 for (tries = 0; tries < 75; tries++) 2780 { 2781 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0) 2782 continue; 2783 2784 /* got an event notification */ 2785 if (reply[0] == '<') 2786 { 2787 /* scan results are ready */ 2788 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS")) 2789 { 2790 /* send "SCAN_RESULTS" command */ 2791 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12); 2792 break; 2793 } 2794 2795 /* is another unrelated event, retry */ 2796 tries--; 2797 } 2798 2799 /* scanning already in progress, keep awaiting results */ 2800 else if (!strcmp(reply, "FAIL-BUSY\n")) 2801 { 2802 tries--; 2803 } 2804 2805 /* another failure, abort */ 2806 else if (!strncmp(reply, "FAIL-", 5)) 2807 { 2808 break; 2809 } 2810 } 2811 2812 /* receive and parse scan results if the wait above didn't time out */ 2813 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0) 2814 { 2815 /* received an event notification, receive again */ 2816 if (reply[0] == '<') 2817 continue; 2818 2819 nl80211_get_quality_max(ifname, &qmax); 2820 2821 for (line = strtok_r(reply, "\n", &pos); 2822 line != NULL; 2823 line = strtok_r(NULL, "\n", &pos)) 2824 { 2825 /* skip header line */ 2826 if (count < 0) 2827 { 2828 count++; 2829 continue; 2830 } 2831 2832 bssid = strtok(line, "\t"); 2833 freq = strtok(NULL, "\t"); 2834 signal = strtok(NULL, "\t"); 2835 flags = strtok(NULL, "\t"); 2836 ssid = strtok(NULL, "\n"); 2837 2838 if (!bssid || !freq || !signal || !flags) 2839 continue; 2840 2841 /* BSSID */ 2842 e->mac[0] = strtol(&bssid[0], NULL, 16); 2843 e->mac[1] = strtol(&bssid[3], NULL, 16); 2844 e->mac[2] = strtol(&bssid[6], NULL, 16); 2845 e->mac[3] = strtol(&bssid[9], NULL, 16); 2846 e->mac[4] = strtol(&bssid[12], NULL, 16); 2847 e->mac[5] = strtol(&bssid[15], NULL, 16); 2848 2849 /* SSID */ 2850 if (ssid) 2851 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid)); 2852 else 2853 e->ssid[0] = 0; 2854 2855 /* Mode */ 2856 if (strstr(flags, "[MESH]")) 2857 e->mode = IWINFO_OPMODE_MESHPOINT; 2858 else if (strstr(flags, "[IBSS]")) 2859 e->mode = IWINFO_OPMODE_ADHOC; 2860 else 2861 e->mode = IWINFO_OPMODE_MASTER; 2862 2863 /* Channel */ 2864 e->mhz = atoi(freq); 2865 e->band = nl80211_freq2band(e->mhz); 2866 e->channel = nl80211_freq2channel(e->mhz); 2867 2868 /* Signal */ 2869 rssi = atoi(signal); 2870 e->signal = rssi; 2871 2872 /* Quality */ 2873 if (rssi < 0) 2874 { 2875 /* The cfg80211 wext compat layer assumes a signal range 2876 * of -110 dBm to -40 dBm, the quality value is derived 2877 * by adding 110 to the signal level */ 2878 if (rssi < -110) 2879 rssi = -110; 2880 else if (rssi > -40) 2881 rssi = -40; 2882 2883 e->quality = (rssi + 110); 2884 } 2885 else 2886 { 2887 e->quality = rssi; 2888 } 2889 2890 /* Max. Quality */ 2891 e->quality_max = qmax; 2892 2893 /* Crypto */ 2894 nl80211_get_scancrypto(flags, &e->crypto); 2895 2896 count++; 2897 e++; 2898 } 2899 2900 *len = count * sizeof(struct iwinfo_scanlist_entry); 2901 break; 2902 } 2903 2904 close(sock); 2905 unlink(local.sun_path); 2906 2907 return (count >= 0) ? 0 : -1; 2908 } 2909 2910 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len) 2911 { 2912 char *res; 2913 int rv, mode; 2914 2915 *len = 0; 2916 2917 /* Got a radioX pseudo interface, find some interface on it or create one */ 2918 if (!strncmp(ifname, "radio", 5)) 2919 { 2920 /* Reuse existing interface */ 2921 if ((res = nl80211_phy2ifname(ifname)) != NULL) 2922 { 2923 return nl80211_get_scanlist(res, buf, len); 2924 } 2925 2926 /* Need to spawn a temporary iface for scanning */ 2927 else if ((res = nl80211_ifadd(ifname)) != NULL) 2928 { 2929 rv = nl80211_get_scanlist(res, buf, len); 2930 nl80211_ifdel(res); 2931 return rv; 2932 } 2933 } 2934 2935 /* WPA supplicant */ 2936 if (!nl80211_get_scanlist_wpactl(ifname, buf, len)) 2937 { 2938 return 0; 2939 } 2940 2941 /* station / ad-hoc / monitor scan */ 2942 else if (!nl80211_get_mode(ifname, &mode) && 2943 (mode == IWINFO_OPMODE_ADHOC || 2944 mode == IWINFO_OPMODE_MASTER || 2945 mode == IWINFO_OPMODE_CLIENT || 2946 mode == IWINFO_OPMODE_MONITOR) && 2947 iwinfo_ifup(ifname)) 2948 { 2949 return nl80211_get_scanlist_nl(ifname, buf, len); 2950 } 2951 2952 /* AP scan */ 2953 else 2954 { 2955 /* Got a temp interface, don't create yet another one */ 2956 if (!strncmp(ifname, "tmp.", 4)) 2957 { 2958 if (!iwinfo_ifup(ifname)) 2959 return -1; 2960 2961 rv = nl80211_get_scanlist_nl(ifname, buf, len); 2962 iwinfo_ifdown(ifname); 2963 return rv; 2964 } 2965 2966 /* Spawn a new scan interface */ 2967 else 2968 { 2969 if (!(res = nl80211_ifadd(ifname))) 2970 return -1; 2971 2972 iwinfo_ifmac(res); 2973 2974 /* if we can take the new interface up, the driver supports an 2975 * additional interface and there's no need to tear down the ap */ 2976 if (iwinfo_ifup(res)) 2977 { 2978 rv = nl80211_get_scanlist_nl(res, buf, len); 2979 iwinfo_ifdown(res); 2980 } 2981 2982 /* driver cannot create secondary interface, take down ap 2983 * during scan */ 2984 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res)) 2985 { 2986 rv = nl80211_get_scanlist_nl(res, buf, len); 2987 iwinfo_ifdown(res); 2988 iwinfo_ifup(ifname); 2989 nl80211_hostapd_hup(ifname); 2990 } 2991 else 2992 rv = -1; 2993 2994 nl80211_ifdel(res); 2995 return rv; 2996 } 2997 } 2998 2999 return -1; 3000 } 3001 3002 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg) 3003 { 3004 int bands_remain, freqs_remain; 3005 3006 struct nl80211_array_buf *arr = arg; 3007 struct iwinfo_freqlist_entry *e; 3008 3009 struct nlattr **attr = nl80211_parse(msg); 3010 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 3011 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 3012 struct nlattr *band, *freq; 3013 3014 e = arr->buf; 3015 e += arr->count; 3016 3017 if (attr[NL80211_ATTR_WIPHY_BANDS]) { 3018 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 3019 { 3020 nla_parse(bands, NL80211_BAND_ATTR_MAX, 3021 nla_data(band), nla_len(band), NULL); 3022 3023 if (bands[NL80211_BAND_ATTR_FREQS]) { 3024 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 3025 { 3026 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 3027 nla_data(freq), nla_len(freq), NULL); 3028 3029 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] || 3030 freqs[NL80211_FREQUENCY_ATTR_DISABLED]) 3031 continue; 3032 3033 e->band = nl80211_get_band(band->nla_type); 3034 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]); 3035 e->channel = nl80211_freq2channel(e->mhz); 3036 3037 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS]) 3038 e->flags |= IWINFO_FREQ_NO_HT40MINUS; 3039 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS]) 3040 e->flags |= IWINFO_FREQ_NO_HT40PLUS; 3041 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ]) 3042 e->flags |= IWINFO_FREQ_NO_80MHZ; 3043 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ]) 3044 e->flags |= IWINFO_FREQ_NO_160MHZ; 3045 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ]) 3046 e->flags |= IWINFO_FREQ_NO_20MHZ; 3047 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ]) 3048 e->flags |= IWINFO_FREQ_NO_10MHZ; 3049 if (freqs[NL80211_FREQUENCY_ATTR_NO_HE]) 3050 e->flags |= IWINFO_FREQ_NO_HE; 3051 if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] && 3052 !freqs[NL80211_FREQUENCY_ATTR_RADAR]) 3053 e->flags |= IWINFO_FREQ_NO_IR; 3054 if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY]) 3055 e->flags |= IWINFO_FREQ_INDOOR_ONLY; 3056 3057 /* keep backwards compatibility */ 3058 e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0; 3059 3060 e++; 3061 arr->count++; 3062 } 3063 } 3064 } 3065 } 3066 3067 return NL_SKIP; 3068 } 3069 3070 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len) 3071 { 3072 struct nl80211_msg_conveyor *cv; 3073 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 3074 uint32_t features = nl80211_get_protocol_features(ifname); 3075 int flags; 3076 3077 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3078 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3079 if (!cv) 3080 goto out; 3081 3082 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3083 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr)) 3084 goto out; 3085 3086 *len = arr.count * sizeof(struct iwinfo_freqlist_entry); 3087 return 0; 3088 3089 nla_put_failure: 3090 nl80211_free(cv); 3091 out: 3092 *len = 0; 3093 return -1; 3094 } 3095 3096 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg) 3097 { 3098 char *buf = arg; 3099 struct nlattr **attr = nl80211_parse(msg); 3100 3101 if (attr[NL80211_ATTR_REG_ALPHA2]) 3102 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2); 3103 else 3104 buf[0] = 0; 3105 3106 return NL_SKIP; 3107 } 3108 3109 static int nl80211_get_country(const char *ifname, char *buf) 3110 { 3111 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0, 3112 nl80211_get_country_cb, buf)) 3113 return -1; 3114 3115 return 0; 3116 } 3117 3118 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len) 3119 { 3120 int count; 3121 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf; 3122 const struct iwinfo_iso3166_label *l; 3123 3124 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++) 3125 { 3126 e->iso3166 = l->iso3166; 3127 e->ccode[0] = (l->iso3166 / 256); 3128 e->ccode[1] = (l->iso3166 % 256); 3129 e->ccode[2] = 0; 3130 } 3131 3132 *len = (count * sizeof(struct iwinfo_country_entry)); 3133 return 0; 3134 } 3135 3136 3137 struct nl80211_modes 3138 { 3139 bool ok; 3140 uint32_t hw; 3141 uint32_t ht; 3142 3143 uint8_t bands; 3144 3145 uint16_t nl_ht; 3146 uint32_t nl_vht; 3147 uint16_t he_phy_cap[6]; 3148 }; 3149 3150 static void nl80211_eval_modelist(struct nl80211_modes *m) 3151 { 3152 /* Treat any nonzero capability as 11n */ 3153 if (m->nl_ht > 0) 3154 { 3155 m->hw |= IWINFO_80211_N; 3156 m->ht |= IWINFO_HTMODE_HT20; 3157 3158 if (m->nl_ht & (1 << 1)) 3159 m->ht |= IWINFO_HTMODE_HT40; 3160 } 3161 3162 if (m->he_phy_cap[0] != 0) { 3163 m->hw |= IWINFO_80211_AX; 3164 m->ht |= IWINFO_HTMODE_HE20; 3165 3166 if (m->he_phy_cap[0] & BIT(9)) 3167 m->ht |= IWINFO_HTMODE_HE40; 3168 if (m->he_phy_cap[0] & BIT(10)) 3169 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80; 3170 if (m->he_phy_cap[0] & BIT(11)) 3171 m->ht |= IWINFO_HTMODE_HE160; 3172 if (m->he_phy_cap[0] & BIT(12)) 3173 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80; 3174 } 3175 3176 if (m->bands & IWINFO_BAND_24) 3177 { 3178 m->hw |= IWINFO_80211_B; 3179 m->hw |= IWINFO_80211_G; 3180 } 3181 3182 if (m->bands & IWINFO_BAND_5) 3183 { 3184 /* Treat any nonzero capability as 11ac */ 3185 if (m->nl_vht > 0) 3186 { 3187 m->hw |= IWINFO_80211_AC; 3188 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80; 3189 3190 switch ((m->nl_vht >> 2) & 3) 3191 { 3192 case 2: 3193 m->ht |= IWINFO_HTMODE_VHT80_80; 3194 /* fall through */ 3195 3196 case 1: 3197 m->ht |= IWINFO_HTMODE_VHT160; 3198 } 3199 } 3200 else 3201 { 3202 m->hw |= IWINFO_80211_A; 3203 } 3204 } 3205 3206 if (m->bands & IWINFO_BAND_60) 3207 { 3208 m->hw |= IWINFO_80211_AD; 3209 } 3210 3211 } 3212 3213 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg) 3214 { 3215 struct nl80211_modes *m = arg; 3216 int bands_remain; 3217 struct nlattr **attr = nl80211_parse(msg); 3218 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 3219 struct nlattr *band; 3220 3221 if (attr[NL80211_ATTR_WIPHY_BANDS]) 3222 { 3223 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 3224 { 3225 m->bands |= nl80211_get_band(band->nla_type); 3226 3227 nla_parse(bands, NL80211_BAND_ATTR_MAX, 3228 nla_data(band), nla_len(band), NULL); 3229 3230 if (bands[NL80211_BAND_ATTR_HT_CAPA]) 3231 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]); 3232 3233 if (bands[NL80211_BAND_ATTR_VHT_CAPA]) 3234 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]); 3235 3236 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) { 3237 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1]; 3238 struct nlattr *nl_iftype; 3239 int rem_band; 3240 int len; 3241 3242 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) { 3243 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX, 3244 nla_data(nl_iftype), nla_len(nl_iftype), NULL); 3245 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) { 3246 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]); 3247 3248 if (len > sizeof(m->he_phy_cap) - 1) 3249 len = sizeof(m->he_phy_cap) - 1; 3250 memcpy(&((__u8 *)m->he_phy_cap)[1], 3251 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]), 3252 len); 3253 } 3254 } 3255 } 3256 } 3257 3258 m->ok = 1; 3259 } 3260 3261 return NL_SKIP; 3262 } 3263 3264 static int nl80211_get_hwmodelist(const char *ifname, int *buf) 3265 { 3266 struct nl80211_msg_conveyor *cv; 3267 struct nl80211_modes m = {}; 3268 uint32_t features = nl80211_get_protocol_features(ifname); 3269 int flags; 3270 3271 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3272 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3273 if (!cv) 3274 goto out; 3275 3276 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3277 if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) 3278 goto nla_put_failure; 3279 3280 nl80211_eval_modelist(&m); 3281 3282 *buf = m.hw; 3283 3284 return 0; 3285 3286 nla_put_failure: 3287 nl80211_free(cv); 3288 out: 3289 return -1; 3290 } 3291 3292 struct chan_info { 3293 int width; 3294 int mode; 3295 }; 3296 3297 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg) 3298 { 3299 struct nlattr **tb = nl80211_parse(msg); 3300 struct nlattr *cur; 3301 struct chan_info *chn = arg; 3302 3303 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH])) 3304 chn->width = nla_get_u32(cur); 3305 3306 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE])) 3307 chn->mode = nla_get_u32(cur); 3308 3309 return NL_SKIP; 3310 } 3311 3312 static int nl80211_get_htmode(const char *ifname, int *buf) 3313 { 3314 struct chan_info chn = { 0 }; 3315 char *res, b[2] = { 0 }; 3316 int err; 3317 bool he = false; 3318 3319 res = nl80211_phy2ifname(ifname); 3320 *buf = 0; 3321 3322 err = nl80211_request(res ? res : ifname, 3323 NL80211_CMD_GET_INTERFACE, 0, 3324 nl80211_get_htmode_cb, &chn); 3325 if (err) 3326 return -1; 3327 3328 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b))) 3329 he = b[0] == '1'; 3330 else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b))) 3331 he = b[0] == '6'; 3332 3333 switch (chn.width) { 3334 case NL80211_CHAN_WIDTH_20: 3335 if (he) 3336 *buf = IWINFO_HTMODE_HE20; 3337 else if (chn.mode == -1) 3338 *buf = IWINFO_HTMODE_VHT20; 3339 else 3340 *buf = IWINFO_HTMODE_HT20; 3341 break; 3342 case NL80211_CHAN_WIDTH_40: 3343 if (he) 3344 *buf = IWINFO_HTMODE_HE40; 3345 else if (chn.mode == -1) 3346 *buf = IWINFO_HTMODE_VHT40; 3347 else 3348 *buf = IWINFO_HTMODE_HT40; 3349 break; 3350 case NL80211_CHAN_WIDTH_80: 3351 if (he) 3352 *buf = IWINFO_HTMODE_HE80; 3353 else 3354 *buf = IWINFO_HTMODE_VHT80; 3355 break; 3356 case NL80211_CHAN_WIDTH_80P80: 3357 if (he) 3358 *buf = IWINFO_HTMODE_HE80_80; 3359 else 3360 *buf = IWINFO_HTMODE_VHT80_80; 3361 break; 3362 case NL80211_CHAN_WIDTH_160: 3363 if (he) 3364 *buf = IWINFO_HTMODE_HE160; 3365 else 3366 *buf = IWINFO_HTMODE_VHT160; 3367 break; 3368 case NL80211_CHAN_WIDTH_5: 3369 case NL80211_CHAN_WIDTH_10: 3370 case NL80211_CHAN_WIDTH_20_NOHT: 3371 *buf = IWINFO_HTMODE_NOHT; 3372 break; 3373 default: 3374 return -1; 3375 } 3376 3377 return 0; 3378 } 3379 3380 static int nl80211_get_htmodelist(const char *ifname, int *buf) 3381 { 3382 struct nl80211_msg_conveyor *cv; 3383 struct nl80211_modes m = {}; 3384 uint32_t features = nl80211_get_protocol_features(ifname); 3385 int flags; 3386 3387 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3388 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3389 if (!cv) 3390 goto out; 3391 3392 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3393 if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) 3394 goto nla_put_failure; 3395 3396 nl80211_eval_modelist(&m); 3397 3398 *buf = m.ht; 3399 3400 return 0; 3401 3402 nla_put_failure: 3403 nl80211_free(cv); 3404 out: 3405 return -1; 3406 } 3407 3408 3409 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg) 3410 { 3411 struct nlattr **attr = nl80211_parse(msg); 3412 struct nlattr *comb; 3413 int *ret = arg; 3414 int comb_rem, limit_rem, mode_rem; 3415 3416 *ret = 0; 3417 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS]) 3418 return NL_SKIP; 3419 3420 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem) 3421 { 3422 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = { 3423 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED }, 3424 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 }, 3425 }; 3426 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1]; 3427 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = { 3428 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED }, 3429 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 }, 3430 }; 3431 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1]; 3432 struct nlattr *limit; 3433 3434 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy); 3435 3436 if (!tb_comb[NL80211_IFACE_COMB_LIMITS]) 3437 continue; 3438 3439 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem) 3440 { 3441 struct nlattr *mode; 3442 3443 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy); 3444 3445 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] || 3446 !tb_limit[NL80211_IFACE_LIMIT_MAX]) 3447 continue; 3448 3449 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2) 3450 continue; 3451 3452 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) { 3453 if (nla_type(mode) == NL80211_IFTYPE_AP) 3454 *ret = 1; 3455 } 3456 } 3457 } 3458 3459 return NL_SKIP; 3460 } 3461 3462 static int nl80211_get_mbssid_support(const char *ifname, int *buf) 3463 { 3464 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 3465 nl80211_get_ifcomb_cb, buf)) 3466 return -1; 3467 3468 return 0; 3469 } 3470 3471 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname) 3472 { 3473 char *phy, path[PATH_MAX]; 3474 3475 /* Try to determine the phy name from the given interface */ 3476 phy = nl80211_ifname2phy(ifname); 3477 3478 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible", 3479 phy ? "ieee80211" : "net", phy ? phy : ifname); 3480 3481 if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0) 3482 return -1; 3483 3484 return 0; 3485 } 3486 3487 3488 static int nl80211_get_hardware_id(const char *ifname, char *buf) 3489 { 3490 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf; 3491 char *phy, num[8], path[PATH_MAX]; 3492 int i; 3493 3494 struct { const char *path; uint16_t *dest; } lookup[] = { 3495 { "vendor", &id->vendor_id }, 3496 { "device", &id->device_id }, 3497 { "subsystem_vendor", &id->subsystem_vendor_id }, 3498 { "subsystem_device", &id->subsystem_device_id }, 3499 { "../idVendor", &id->subsystem_vendor_id }, 3500 { "../idProduct", &id->subsystem_device_id } 3501 }; 3502 3503 memset(id, 0, sizeof(*id)); 3504 3505 /* Try to determine the phy name from the given interface */ 3506 phy = nl80211_ifname2phy(ifname); 3507 3508 for (i = 0; i < ARRAY_SIZE(lookup); i++) 3509 { 3510 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s", 3511 phy ? "ieee80211" : "net", 3512 phy ? phy : ifname, lookup[i].path); 3513 3514 if (nl80211_readstr(path, num, sizeof(num)) > 0) 3515 *lookup[i].dest = strtoul(num, NULL, 16); 3516 } 3517 3518 /* Failed to obtain hardware PCI/USB IDs... */ 3519 if (id->vendor_id == 0 && id->device_id == 0 && 3520 id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0) 3521 /* ... first fallback to FDT ... */ 3522 if (nl80211_hardware_id_from_fdt(id, ifname) == -1) 3523 /* ... then board config */ 3524 return iwinfo_hardware_id_from_mtd(id); 3525 3526 return 0; 3527 } 3528 3529 static const struct iwinfo_hardware_entry * 3530 nl80211_get_hardware_entry(const char *ifname) 3531 { 3532 struct iwinfo_hardware_id id; 3533 3534 if (nl80211_get_hardware_id(ifname, (char *)&id)) 3535 return NULL; 3536 3537 return iwinfo_hardware(&id); 3538 } 3539 3540 static int nl80211_get_hardware_name(const char *ifname, char *buf) 3541 { 3542 const struct iwinfo_hardware_entry *hw; 3543 3544 if (!(hw = nl80211_get_hardware_entry(ifname))) 3545 sprintf(buf, "Generic MAC80211"); 3546 else 3547 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name); 3548 3549 return 0; 3550 } 3551 3552 static int nl80211_get_txpower_offset(const char *ifname, int *buf) 3553 { 3554 const struct iwinfo_hardware_entry *hw; 3555 3556 if (!(hw = nl80211_get_hardware_entry(ifname))) 3557 return -1; 3558 3559 *buf = hw->txpower_offset; 3560 return 0; 3561 } 3562 3563 static int nl80211_get_frequency_offset(const char *ifname, int *buf) 3564 { 3565 const struct iwinfo_hardware_entry *hw; 3566 3567 if (!(hw = nl80211_get_hardware_entry(ifname))) 3568 return -1; 3569 3570 *buf = hw->frequency_offset; 3571 return 0; 3572 } 3573 3574 static int nl80211_lookup_phyname(const char *section, char *buf) 3575 { 3576 const char *name; 3577 int idx; 3578 3579 if (!strncmp(section, "path=", 5)) 3580 idx = nl80211_phy_idx_from_path(section + 5); 3581 else if (!strncmp(section, "macaddr=", 8)) 3582 idx = nl80211_phy_idx_from_macaddr(section + 8); 3583 else 3584 idx = nl80211_phy_idx_from_uci(section); 3585 3586 if (idx < 0) 3587 return -1; 3588 3589 name = nl80211_phyidx2name(idx); 3590 if (!name) 3591 return -1; 3592 3593 strcpy(buf, name); 3594 return 0; 3595 } 3596 3597 static int nl80211_phy_path(const char *phyname, const char **path) 3598 { 3599 if (strchr(phyname, '/')) 3600 return -1; 3601 3602 *path = nl80211_phy_path_str(phyname); 3603 if (!*path) 3604 return -1; 3605 3606 return 0; 3607 } 3608 3609 const struct iwinfo_ops nl80211_ops = { 3610 .name = "nl80211", 3611 .probe = nl80211_probe, 3612 .channel = nl80211_get_channel, 3613 .center_chan1 = nl80211_get_center_chan1, 3614 .center_chan2 = nl80211_get_center_chan2, 3615 .frequency = nl80211_get_frequency, 3616 .frequency_offset = nl80211_get_frequency_offset, 3617 .txpower = nl80211_get_txpower, 3618 .txpower_offset = nl80211_get_txpower_offset, 3619 .bitrate = nl80211_get_bitrate, 3620 .signal = nl80211_get_signal, 3621 .noise = nl80211_get_noise, 3622 .quality = nl80211_get_quality, 3623 .quality_max = nl80211_get_quality_max, 3624 .mbssid_support = nl80211_get_mbssid_support, 3625 .hwmodelist = nl80211_get_hwmodelist, 3626 .htmodelist = nl80211_get_htmodelist, 3627 .htmode = nl80211_get_htmode, 3628 .mode = nl80211_get_mode, 3629 .ssid = nl80211_get_ssid, 3630 .bssid = nl80211_get_bssid, 3631 .country = nl80211_get_country, 3632 .hardware_id = nl80211_get_hardware_id, 3633 .hardware_name = nl80211_get_hardware_name, 3634 .encryption = nl80211_get_encryption, 3635 .phyname = nl80211_get_phyname, 3636 .assoclist = nl80211_get_assoclist, 3637 .txpwrlist = nl80211_get_txpwrlist, 3638 .scanlist = nl80211_get_scanlist, 3639 .freqlist = nl80211_get_freqlist, 3640 .countrylist = nl80211_get_countrylist, 3641 .survey = nl80211_get_survey, 3642 .lookup_phy = nl80211_lookup_phyname, 3643 .phy_path = nl80211_phy_path, 3644 .close = nl80211_close 3645 }; 3646
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