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 if ((d = opendir("/sys/class/net")) != NULL) 829 { 830 while ((e = readdir(d)) != NULL) 831 { 832 snprintf(buffer, sizeof(buffer), 833 "/sys/class/net/%s/phy80211/index", e->d_name); 834 if (nl80211_readint(buffer) != phyidx) 835 continue; 836 837 snprintf(buffer, sizeof(buffer), 838 "/sys/class/net/%s/ifindex", e->d_name); 839 cifidx = nl80211_readint(buffer); 840 841 if (cifidx < 0) 842 continue; 843 844 snprintf(buffer, sizeof(buffer), 845 "/sys/class/net/%s/link_mode", e->d_name); 846 clmode = nl80211_readint(buffer); 847 848 /* prefer non-supplicant-based devices */ 849 if ((ifidx < 0) || (cifidx < ifidx) || ((lmode == 1) && (clmode != 1))) 850 { 851 ifidx = cifidx; 852 lmode = clmode; 853 strncpy(nif, e->d_name, sizeof(nif) - 1); 854 } 855 } 856 857 closedir(d); 858 } 859 860 return nif[0] ? nif : NULL; 861 } 862 863 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg) 864 { 865 int *mode = arg; 866 struct nlattr **tb = nl80211_parse(msg); 867 const int ifmodes[NL80211_IFTYPE_MAX + 1] = { 868 IWINFO_OPMODE_UNKNOWN, /* unspecified */ 869 IWINFO_OPMODE_ADHOC, /* IBSS */ 870 IWINFO_OPMODE_CLIENT, /* managed */ 871 IWINFO_OPMODE_MASTER, /* AP */ 872 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */ 873 IWINFO_OPMODE_WDS, /* WDS */ 874 IWINFO_OPMODE_MONITOR, /* monitor */ 875 IWINFO_OPMODE_MESHPOINT, /* mesh point */ 876 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */ 877 IWINFO_OPMODE_P2P_GO, /* P2P-GO */ 878 }; 879 880 if (tb[NL80211_ATTR_IFTYPE]) 881 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])]; 882 883 return NL_SKIP; 884 } 885 886 887 static int nl80211_get_mode(const char *ifname, int *buf) 888 { 889 char *res; 890 891 *buf = IWINFO_OPMODE_UNKNOWN; 892 893 res = nl80211_phy2ifname(ifname); 894 895 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 896 nl80211_get_mode_cb, buf); 897 898 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0; 899 } 900 901 static int __nl80211_hostapd_query(const char *ifname, ...) 902 { 903 va_list ap, ap_cur; 904 char *phy, *search, *dest, *key, *val, buf[128]; 905 int len, mode, found = 0, match = 1; 906 FILE *fp; 907 908 if (nl80211_get_mode(ifname, &mode)) 909 return 0; 910 911 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN) 912 return 0; 913 914 phy = nl80211_ifname2phy(ifname); 915 916 if (!phy) 917 return 0; 918 919 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy); 920 fp = fopen(buf, "r"); 921 922 if (!fp) 923 return 0; 924 925 va_start(ap, ifname); 926 927 /* clear all destination buffers */ 928 va_copy(ap_cur, ap); 929 930 while ((search = va_arg(ap_cur, char *)) != NULL) 931 { 932 dest = va_arg(ap_cur, char *); 933 len = va_arg(ap_cur, int); 934 935 memset(dest, 0, len); 936 } 937 938 va_end(ap_cur); 939 940 /* iterate applicable lines and copy found values into dest buffers */ 941 while (fgets(buf, sizeof(buf), fp)) 942 { 943 key = strtok(buf, " =\t\n"); 944 val = strtok(NULL, "\n"); 945 946 if (!key || !val || !*key || *key == '#') 947 continue; 948 949 if (!strcmp(key, "interface") || !strcmp(key, "bss")) 950 match = !strcmp(ifname, val); 951 952 if (!match) 953 continue; 954 955 va_copy(ap_cur, ap); 956 957 while ((search = va_arg(ap_cur, char *)) != NULL) 958 { 959 dest = va_arg(ap_cur, char *); 960 len = va_arg(ap_cur, int); 961 962 if (!strcmp(search, key)) 963 { 964 strncpy(dest, val, len - 1); 965 found++; 966 break; 967 } 968 } 969 970 va_end(ap_cur); 971 } 972 973 fclose(fp); 974 975 va_end(ap); 976 977 return found; 978 } 979 980 #define nl80211_hostapd_query(ifname, ...) \ 981 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL) 982 983 984 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen) 985 { 986 fd_set rfds; 987 struct timeval tv = { 0, 256000 }; 988 989 FD_ZERO(&rfds); 990 FD_SET(sock, &rfds); 991 992 memset(buf, 0, blen); 993 994 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0) 995 return -1; 996 997 if (!FD_ISSET(sock, &rfds)) 998 return -1; 999 1000 return recv(sock, buf, blen - 1, 0); 1001 } 1002 1003 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local) 1004 { 1005 struct sockaddr_un remote = { 0 }; 1006 size_t remote_length, local_length; 1007 1008 int sock = socket(PF_UNIX, SOCK_DGRAM, 0); 1009 if (sock < 0) 1010 return sock; 1011 1012 remote.sun_family = AF_UNIX; 1013 remote_length = sizeof(remote.sun_family) + 1014 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname); 1015 1016 /* Set client socket file permissions so that bind() creates the client 1017 * socket with these permissions and there is no need to try to change 1018 * them with chmod() after bind() which would have potential issues with 1019 * race conditions. These permissions are needed to make sure the server 1020 * side (wpa_supplicant or hostapd) can reply to the control interface 1021 * messages. 1022 * 1023 * The lchown() calls below after bind() are also part of the needed 1024 * operations to allow the response to go through. Those are using the 1025 * no-deference-symlinks version to avoid races. */ 1026 fchmod(sock, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); 1027 1028 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0) 1029 { 1030 close(sock); 1031 return -1; 1032 } 1033 1034 if (connect(sock, (struct sockaddr *)&remote, remote_length)) 1035 { 1036 close(sock); 1037 return -1; 1038 } 1039 1040 local->sun_family = AF_UNIX; 1041 local_length = sizeof(local->sun_family) + 1042 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid()); 1043 1044 if (bind(sock, (struct sockaddr *)local, local_length) < 0) 1045 { 1046 close(sock); 1047 return -1; 1048 } 1049 1050 /* Set group even if we do not have privileges to change owner */ 1051 lchown(local->sun_path, -1, 101); 1052 lchown(local->sun_path, 101, 101); 1053 1054 return sock; 1055 } 1056 1057 static int __nl80211_wpactl_query(const char *ifname, ...) 1058 { 1059 va_list ap, ap_cur; 1060 struct sockaddr_un local = { 0 }; 1061 int len, mode, found = 0, sock = -1; 1062 char *search, *dest, *key, *val, *line, *pos, buf[512]; 1063 1064 if (nl80211_get_mode(ifname, &mode)) 1065 return 0; 1066 1067 if (mode != IWINFO_OPMODE_CLIENT && 1068 mode != IWINFO_OPMODE_ADHOC && 1069 mode != IWINFO_OPMODE_MESHPOINT) 1070 return 0; 1071 1072 sock = nl80211_wpactl_connect(ifname, &local); 1073 1074 if (sock < 0) 1075 return 0; 1076 1077 va_start(ap, ifname); 1078 1079 /* clear all destination buffers */ 1080 va_copy(ap_cur, ap); 1081 1082 while ((search = va_arg(ap_cur, char *)) != NULL) 1083 { 1084 dest = va_arg(ap_cur, char *); 1085 len = va_arg(ap_cur, int); 1086 1087 memset(dest, 0, len); 1088 } 1089 1090 va_end(ap_cur); 1091 1092 send(sock, "STATUS", 6, 0); 1093 1094 while (true) 1095 { 1096 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0) 1097 break; 1098 1099 if (buf[0] == '<') 1100 continue; 1101 1102 for (line = strtok_r(buf, "\n", &pos); 1103 line != NULL; 1104 line = strtok_r(NULL, "\n", &pos)) 1105 { 1106 key = strtok(line, "="); 1107 val = strtok(NULL, "\n"); 1108 1109 if (!key || !val) 1110 continue; 1111 1112 va_copy(ap_cur, ap); 1113 1114 while ((search = va_arg(ap_cur, char *)) != NULL) 1115 { 1116 dest = va_arg(ap_cur, char *); 1117 len = va_arg(ap_cur, int); 1118 1119 if (!strcmp(search, key)) 1120 { 1121 strncpy(dest, val, len - 1); 1122 found++; 1123 break; 1124 } 1125 } 1126 1127 va_end(ap_cur); 1128 } 1129 1130 break; 1131 } 1132 1133 va_end(ap); 1134 1135 close(sock); 1136 unlink(local.sun_path); 1137 1138 return found; 1139 } 1140 1141 #define nl80211_wpactl_query(ifname, ...) \ 1142 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL) 1143 1144 1145 static char * nl80211_ifadd(const char *ifname) 1146 { 1147 char path[PATH_MAX]; 1148 static char nif[IFNAMSIZ] = { 0 }; 1149 struct nl80211_msg_conveyor *req; 1150 FILE *sysfs; 1151 1152 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0); 1153 if (req) 1154 { 1155 snprintf(nif, sizeof(nif), "tmp.%s", ifname); 1156 1157 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif); 1158 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION); 1159 1160 nl80211_send(req, NULL, NULL); 1161 1162 snprintf(path, sizeof(path) - 1, 1163 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif); 1164 1165 if ((sysfs = fopen(path, "w")) != NULL) 1166 { 1167 fwrite("\n", 1, 2, sysfs); 1168 fclose(sysfs); 1169 } 1170 1171 return nif; 1172 1173 nla_put_failure: 1174 nl80211_free(req); 1175 } 1176 1177 return NULL; 1178 } 1179 1180 static void nl80211_ifdel(const char *ifname) 1181 { 1182 struct nl80211_msg_conveyor *req; 1183 1184 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0); 1185 if (req) 1186 { 1187 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname); 1188 1189 nl80211_send(req, NULL, NULL); 1190 return; 1191 1192 nla_put_failure: 1193 nl80211_free(req); 1194 } 1195 } 1196 1197 static void nl80211_hostapd_hup(const char *ifname) 1198 { 1199 int fd, pid = 0; 1200 char buf[32]; 1201 char *phy = nl80211_ifname2phy(ifname); 1202 1203 if (phy) 1204 { 1205 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy); 1206 if ((fd = open(buf, O_RDONLY)) >= 0) 1207 { 1208 if (read(fd, buf, sizeof(buf)) > 0) 1209 pid = atoi(buf); 1210 1211 close(fd); 1212 } 1213 1214 if (pid > 0) 1215 kill(pid, 1); 1216 } 1217 } 1218 1219 1220 static int nl80211_probe(const char *ifname) 1221 { 1222 return !!nl80211_ifname2phy(ifname); 1223 } 1224 1225 struct nl80211_ssid_bssid { 1226 unsigned char *ssid; 1227 unsigned char bssid[7]; 1228 }; 1229 1230 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg) 1231 { 1232 struct nl80211_ssid_bssid *sb = arg; 1233 struct nlattr **tb = nl80211_parse(msg); 1234 1235 if (tb[NL80211_ATTR_MAC]) { 1236 sb->bssid[0] = 1; 1237 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]), 1238 sizeof(sb->bssid) - 1); 1239 } 1240 1241 return NL_SKIP; 1242 } 1243 1244 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg) 1245 { 1246 int ielen; 1247 unsigned char *ie; 1248 struct nl80211_ssid_bssid *sb = arg; 1249 struct nlattr **tb = nl80211_parse(msg); 1250 struct nlattr *bss[NL80211_BSS_MAX + 1]; 1251 1252 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1253 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 1254 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1255 }; 1256 1257 if (!tb[NL80211_ATTR_BSS] || 1258 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 1259 bss_policy) || 1260 !bss[NL80211_BSS_BSSID] || 1261 !bss[NL80211_BSS_STATUS] || 1262 !bss[NL80211_BSS_INFORMATION_ELEMENTS]) 1263 { 1264 return NL_SKIP; 1265 } 1266 1267 switch (nla_get_u32(bss[NL80211_BSS_STATUS])) 1268 { 1269 case NL80211_BSS_STATUS_ASSOCIATED: 1270 case NL80211_BSS_STATUS_AUTHENTICATED: 1271 case NL80211_BSS_STATUS_IBSS_JOINED: 1272 1273 if (sb->ssid) 1274 { 1275 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1276 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1277 1278 while (ielen >= 2 && ielen >= ie[1]) 1279 { 1280 if (ie[0] == 0) 1281 { 1282 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE)); 1283 return NL_SKIP; 1284 } 1285 1286 ielen -= ie[1] + 2; 1287 ie += ie[1] + 2; 1288 } 1289 } 1290 else 1291 { 1292 sb->bssid[0] = 1; 1293 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6); 1294 return NL_SKIP; 1295 } 1296 1297 default: 1298 return NL_SKIP; 1299 } 1300 } 1301 1302 static int nl80211_get_ssid(const char *ifname, char *buf) 1303 { 1304 char *res; 1305 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf }; 1306 1307 /* try to find ssid from scan dump results */ 1308 res = nl80211_phy2ifname(ifname); 1309 sb.ssid[0] = 0; 1310 1311 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1312 nl80211_get_ssid_bssid_cb, &sb); 1313 1314 /* failed, try to find from hostapd info */ 1315 if (sb.ssid[0] == 0) 1316 nl80211_hostapd_query(ifname, "ssid", sb.ssid, 1317 IWINFO_ESSID_MAX_SIZE + 1); 1318 1319 /* failed, try to obtain Mesh ID */ 1320 if (sb.ssid[0] == 0) 1321 iwinfo_ubus_query(res ? res : ifname, "mesh_id", 1322 buf, IWINFO_ESSID_MAX_SIZE + 1); 1323 1324 return (sb.ssid[0] == 0) ? -1 : 0; 1325 } 1326 1327 static int nl80211_get_bssid(const char *ifname, char *buf) 1328 { 1329 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")]; 1330 struct nl80211_ssid_bssid sb = { }; 1331 1332 res = nl80211_phy2ifname(ifname); 1333 1334 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */ 1335 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1336 nl80211_get_macaddr_cb, &sb); 1337 1338 /* failed, try to find bssid from scan dump results */ 1339 if (sb.bssid[0] == 0) 1340 nl80211_request(res ? res : ifname, 1341 NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1342 nl80211_get_ssid_bssid_cb, &sb); 1343 1344 /* failed, try to find mac from hostapd info */ 1345 if ((sb.bssid[0] == 0) && 1346 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid))) 1347 { 1348 sb.bssid[0] = 1; 1349 sb.bssid[1] = strtol(&bssid[0], NULL, 16); 1350 sb.bssid[2] = strtol(&bssid[3], NULL, 16); 1351 sb.bssid[3] = strtol(&bssid[6], NULL, 16); 1352 sb.bssid[4] = strtol(&bssid[9], NULL, 16); 1353 sb.bssid[5] = strtol(&bssid[12], NULL, 16); 1354 sb.bssid[6] = strtol(&bssid[15], NULL, 16); 1355 } 1356 1357 if (sb.bssid[0]) 1358 { 1359 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", 1360 sb.bssid[1], sb.bssid[2], sb.bssid[3], 1361 sb.bssid[4], sb.bssid[5], sb.bssid[6]); 1362 1363 return 0; 1364 } 1365 1366 return -1; 1367 } 1368 1369 1370 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg) 1371 { 1372 int *freq = arg; 1373 struct nlattr **attr = nl80211_parse(msg); 1374 struct nlattr *binfo[NL80211_BSS_MAX + 1]; 1375 1376 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1377 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 1378 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1379 }; 1380 1381 if (attr[NL80211_ATTR_BSS] && 1382 !nla_parse_nested(binfo, NL80211_BSS_MAX, 1383 attr[NL80211_ATTR_BSS], bss_policy)) 1384 { 1385 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY]) 1386 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]); 1387 } 1388 1389 return NL_SKIP; 1390 } 1391 1392 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg) 1393 { 1394 int *freq = arg; 1395 struct nlattr **tb = nl80211_parse(msg); 1396 1397 if (tb[NL80211_ATTR_WIPHY_FREQ]) 1398 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]); 1399 1400 return NL_SKIP; 1401 } 1402 1403 static int nl80211_get_frequency(const char *ifname, int *buf) 1404 { 1405 char *res, channel[4] = { 0 }, hwmode[3] = { 0 }, ax[2] = { 0 }; 1406 1407 /* try to find frequency from interface info */ 1408 res = nl80211_phy2ifname(ifname); 1409 *buf = 0; 1410 1411 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1412 nl80211_get_frequency_info_cb, buf); 1413 1414 /* failed, try to find frequency from hostapd info */ 1415 if ((*buf == 0) && 1416 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode), 1417 "channel", channel, sizeof(channel), 1418 "ieee80211ax", ax, sizeof(ax)) >= 2) 1419 { 1420 *buf = nl80211_channel2freq(atoi(channel), hwmode, ax[0] == '1'); 1421 } 1422 1423 /* failed, try to find frequency from scan results */ 1424 if (*buf == 0) 1425 { 1426 res = nl80211_phy2ifname(ifname); 1427 1428 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1429 nl80211_get_frequency_scan_cb, buf); 1430 } 1431 1432 return (*buf == 0) ? -1 : 0; 1433 } 1434 1435 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg) 1436 { 1437 int *freq = arg; 1438 struct nlattr **tb = nl80211_parse(msg); 1439 1440 if (tb[NL80211_ATTR_CENTER_FREQ1]) 1441 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]); 1442 1443 return NL_SKIP; 1444 } 1445 1446 static int nl80211_get_center_freq1(const char *ifname, int *buf) 1447 { 1448 char *res; 1449 1450 /* try to find frequency from interface info */ 1451 res = nl80211_phy2ifname(ifname); 1452 *buf = 0; 1453 1454 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1455 nl80211_get_center_freq1_cb, buf); 1456 1457 return (*buf == 0) ? -1 : 0; 1458 } 1459 1460 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg) 1461 { 1462 int *freq = arg; 1463 struct nlattr **tb = nl80211_parse(msg); 1464 1465 if (tb[NL80211_ATTR_CENTER_FREQ2]) 1466 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]); 1467 1468 return NL_SKIP; 1469 } 1470 1471 static int nl80211_get_center_freq2(const char *ifname, int *buf) 1472 { 1473 char *res; 1474 1475 /* try to find frequency from interface info */ 1476 res = nl80211_phy2ifname(ifname); 1477 *buf = 0; 1478 1479 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1480 nl80211_get_center_freq2_cb, buf); 1481 1482 return (*buf == 0) ? -1 : 0; 1483 } 1484 1485 static int nl80211_get_channel(const char *ifname, int *buf) 1486 { 1487 if (!nl80211_get_frequency(ifname, buf)) 1488 { 1489 *buf = nl80211_freq2channel(*buf); 1490 return 0; 1491 } 1492 1493 return -1; 1494 } 1495 1496 static int nl80211_get_center_chan1(const char *ifname, int *buf) 1497 { 1498 if (!nl80211_get_center_freq1(ifname, buf)) 1499 { 1500 *buf = nl80211_freq2channel(*buf); 1501 return 0; 1502 } 1503 1504 return -1; 1505 } 1506 1507 static int nl80211_get_center_chan2(const char *ifname, int *buf) 1508 { 1509 if (!nl80211_get_center_freq2(ifname, buf)) 1510 { 1511 *buf = nl80211_freq2channel(*buf); 1512 return 0; 1513 } 1514 1515 return -1; 1516 } 1517 1518 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg) 1519 { 1520 int *buf = arg; 1521 struct nlattr **tb = nl80211_parse(msg); 1522 1523 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]) 1524 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])); 1525 1526 return NL_SKIP; 1527 } 1528 1529 static int nl80211_get_txpower(const char *ifname, int *buf) 1530 { 1531 char *res; 1532 1533 res = nl80211_phy2ifname(ifname); 1534 *buf = 0; 1535 1536 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1537 nl80211_get_txpower_cb, buf)) 1538 return -1; 1539 1540 return 0; 1541 } 1542 1543 1544 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg) 1545 { 1546 int8_t dbm; 1547 int16_t mbit; 1548 struct nl80211_rssi_rate *rr = arg; 1549 struct nlattr **attr = nl80211_parse(msg); 1550 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 1551 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 1552 1553 static const struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 1554 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 1555 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 1556 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 1557 [NL80211_STA_INFO_RX_BYTES64] = { .type = NLA_U64 }, 1558 [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 }, 1559 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 1560 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 1561 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 1562 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 1563 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 1564 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 1565 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 1566 }; 1567 1568 static const struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 1569 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 1570 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 1571 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 1572 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 1573 }; 1574 1575 if (attr[NL80211_ATTR_STA_INFO]) 1576 { 1577 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 1578 attr[NL80211_ATTR_STA_INFO], stats_policy)) 1579 { 1580 if (sinfo[NL80211_STA_INFO_SIGNAL]) 1581 { 1582 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 1583 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1); 1584 rr->rssi_samples++; 1585 } 1586 1587 if (sinfo[NL80211_STA_INFO_TX_BITRATE]) 1588 { 1589 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 1590 sinfo[NL80211_STA_INFO_TX_BITRATE], 1591 rate_policy)) 1592 { 1593 if (rinfo[NL80211_RATE_INFO_BITRATE]) 1594 { 1595 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]); 1596 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1); 1597 rr->rate_samples++; 1598 } 1599 } 1600 } 1601 } 1602 } 1603 1604 return NL_SKIP; 1605 } 1606 1607 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r) 1608 { 1609 DIR *d; 1610 struct dirent *de; 1611 1612 memset(r, 0, sizeof(*r)); 1613 1614 if ((d = opendir("/sys/class/net")) != NULL) 1615 { 1616 while ((de = readdir(d)) != NULL) 1617 { 1618 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 1619 (!de->d_name[strlen(ifname)] || 1620 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 1621 { 1622 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 1623 NLM_F_DUMP, nl80211_fill_signal_cb, r); 1624 } 1625 } 1626 1627 closedir(d); 1628 } 1629 } 1630 1631 static int nl80211_get_bitrate(const char *ifname, int *buf) 1632 { 1633 struct nl80211_rssi_rate rr; 1634 1635 nl80211_fill_signal(ifname, &rr); 1636 1637 if (rr.rate_samples) 1638 { 1639 *buf = (rr.rate * 100); 1640 return 0; 1641 } 1642 1643 return -1; 1644 } 1645 1646 static int nl80211_get_signal(const char *ifname, int *buf) 1647 { 1648 struct nl80211_rssi_rate rr; 1649 1650 nl80211_fill_signal(ifname, &rr); 1651 1652 if (rr.rssi_samples) 1653 { 1654 *buf = rr.rssi; 1655 return 0; 1656 } 1657 1658 return -1; 1659 } 1660 1661 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg) 1662 { 1663 int8_t *noise = arg; 1664 struct nlattr **tb = nl80211_parse(msg); 1665 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1]; 1666 1667 static const struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = { 1668 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 1669 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 1670 }; 1671 1672 if (!tb[NL80211_ATTR_SURVEY_INFO]) 1673 return NL_SKIP; 1674 1675 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX, 1676 tb[NL80211_ATTR_SURVEY_INFO], sp)) 1677 return NL_SKIP; 1678 1679 if (!si[NL80211_SURVEY_INFO_NOISE]) 1680 return NL_SKIP; 1681 1682 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE]) 1683 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]); 1684 1685 return NL_SKIP; 1686 } 1687 1688 1689 static int nl80211_get_noise(const char *ifname, int *buf) 1690 { 1691 int8_t noise = 0; 1692 1693 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP, 1694 nl80211_get_noise_cb, &noise)) 1695 goto out; 1696 1697 *buf = noise; 1698 return 0; 1699 1700 out: 1701 *buf = 0; 1702 return -1; 1703 } 1704 1705 static int nl80211_get_quality(const char *ifname, int *buf) 1706 { 1707 int signal; 1708 1709 if (!nl80211_get_signal(ifname, &signal)) 1710 { 1711 /* A positive signal level is usually just a quality 1712 * value, pass through as-is */ 1713 if (signal >= 0) 1714 { 1715 *buf = signal; 1716 } 1717 1718 /* The cfg80211 wext compat layer assumes a signal range 1719 * of -110 dBm to -40 dBm, the quality value is derived 1720 * by adding 110 to the signal level */ 1721 else 1722 { 1723 if (signal < -110) 1724 signal = -110; 1725 else if (signal > -40) 1726 signal = -40; 1727 1728 *buf = (signal + 110); 1729 } 1730 1731 return 0; 1732 } 1733 1734 return -1; 1735 } 1736 1737 static int nl80211_get_quality_max(const char *ifname, int *buf) 1738 { 1739 /* The cfg80211 wext compat layer assumes a maximum 1740 * quality of 70 */ 1741 *buf = 70; 1742 1743 return 0; 1744 } 1745 1746 static int nl80211_check_wepkey(const char *key) 1747 { 1748 if (key && *key) 1749 { 1750 switch (strlen(key)) 1751 { 1752 case 5: 1753 case 10: 1754 return IWINFO_CIPHER_WEP40; 1755 1756 case 13: 1757 case 26: 1758 return IWINFO_CIPHER_WEP104; 1759 } 1760 } 1761 1762 return 0; 1763 } 1764 1765 static const struct { 1766 const char *match; 1767 int version; 1768 int suite; 1769 } wpa_key_mgmt_strings[] = { 1770 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x }, 1771 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x }, 1772 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x }, 1773 { "EAP-SHA384", 4, IWINFO_KMGMT_8021x }, 1774 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x }, 1775 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK }, 1776 { "NONE", 0, IWINFO_KMGMT_NONE }, 1777 { "None", 0, IWINFO_KMGMT_NONE }, 1778 { "PSK", 0, IWINFO_KMGMT_PSK }, 1779 { "EAP", 0, IWINFO_KMGMT_8021x }, 1780 { "SAE", 4, IWINFO_KMGMT_SAE }, 1781 { "OWE", 4, IWINFO_KMGMT_OWE } 1782 }; 1783 1784 static void parse_wpa_suites(const char *str, int defversion, 1785 uint8_t *versions, uint8_t *suites) 1786 { 1787 size_t l; 1788 int i, version; 1789 const char *p, *q, *m, *sep = " \t\n,-+/"; 1790 1791 for (p = str; *p; ) 1792 { 1793 q = p; 1794 1795 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++) 1796 { 1797 m = wpa_key_mgmt_strings[i].match; 1798 l = strlen(m); 1799 1800 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1801 { 1802 if (wpa_key_mgmt_strings[i].version != 0) 1803 version = wpa_key_mgmt_strings[i].version; 1804 else 1805 version = defversion; 1806 1807 *versions |= version; 1808 *suites |= wpa_key_mgmt_strings[i].suite; 1809 1810 q += l; 1811 break; 1812 } 1813 } 1814 1815 if (q == p) 1816 q += strcspn(q, sep); 1817 1818 p = q + strspn(q, sep); 1819 } 1820 } 1821 1822 static const struct { 1823 const char *match; 1824 int cipher; 1825 } wpa_cipher_strings[] = { 1826 { "WEP-104", IWINFO_CIPHER_WEP104 }, 1827 { "WEP-40", IWINFO_CIPHER_WEP40 }, 1828 { "NONE", IWINFO_CIPHER_NONE }, 1829 { "TKIP", IWINFO_CIPHER_TKIP }, 1830 { "CCMP-256",IWINFO_CIPHER_CCMP256 }, 1831 { "CCMP", IWINFO_CIPHER_CCMP }, 1832 { "GCMP-256",IWINFO_CIPHER_GCMP256 }, 1833 { "GCMP", IWINFO_CIPHER_GCMP } 1834 }; 1835 1836 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers) 1837 { 1838 int i; 1839 size_t l; 1840 const char *m, *p, *q, *sep = " \t\n,-+/"; 1841 1842 for (p = str; *p; ) 1843 { 1844 q = p; 1845 1846 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++) 1847 { 1848 m = wpa_cipher_strings[i].match; 1849 l = strlen(m); 1850 1851 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1852 { 1853 *ciphers |= wpa_cipher_strings[i].cipher; 1854 1855 q += l; 1856 break; 1857 } 1858 } 1859 1860 if (q == p) 1861 q += strcspn(q, sep); 1862 1863 p = q + strspn(q, sep); 1864 } 1865 } 1866 1867 static int nl80211_get_encryption(const char *ifname, char *buf) 1868 { 1869 char *p; 1870 int opmode; 1871 uint8_t wpa_version = 0; 1872 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16]; 1873 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27]; 1874 char mode[16]; 1875 1876 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf; 1877 1878 /* WPA supplicant */ 1879 if (nl80211_wpactl_query(ifname, 1880 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise), 1881 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise), 1882 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1883 "mode", mode, sizeof(mode))) 1884 { 1885 /* WEP or Open */ 1886 if (!strcmp(wpa_key_mgmt, "NONE")) 1887 { 1888 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1889 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1890 1891 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) { 1892 c->enabled = 1; 1893 c->auth_suites = IWINFO_KMGMT_NONE; 1894 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 1895 } 1896 else { 1897 c->pair_ciphers = 0; 1898 c->group_ciphers = 0; 1899 } 1900 } 1901 1902 /* MESH with SAE */ 1903 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN")) 1904 { 1905 c->enabled = 1; 1906 c->wpa_version = 4; 1907 c->auth_suites = IWINFO_KMGMT_SAE; 1908 c->pair_ciphers = IWINFO_CIPHER_CCMP; 1909 c->group_ciphers = IWINFO_CIPHER_CCMP; 1910 } 1911 1912 /* WPA */ 1913 else 1914 { 1915 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1916 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1917 1918 p = wpa_key_mgmt; 1919 1920 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5)) 1921 { 1922 p += 5; 1923 wpa_version = 2; 1924 } 1925 else if (!strncmp(p, "WPA-", 4)) 1926 { 1927 p += 4; 1928 wpa_version = 1; 1929 } 1930 1931 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites); 1932 1933 c->enabled = !!(c->wpa_version && c->auth_suites); 1934 } 1935 1936 return 0; 1937 } 1938 1939 /* Hostapd */ 1940 else if (nl80211_hostapd_query(ifname, 1941 "wpa", wpa, sizeof(wpa), 1942 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1943 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise), 1944 "auth_algs", auth_algs, sizeof(auth_algs), 1945 "wep_key0", wep_key0, sizeof(wep_key0), 1946 "wep_key1", wep_key1, sizeof(wep_key1), 1947 "wep_key2", wep_key2, sizeof(wep_key2), 1948 "wep_key3", wep_key3, sizeof(wep_key3))) 1949 { 1950 c->wpa_version = 0; 1951 1952 if (wpa_key_mgmt[0]) 1953 { 1954 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t")) 1955 { 1956 if (!strncmp(p, "WPA-", 4)) 1957 p += 4; 1958 1959 if (!strncmp(p, "FT-", 3)) 1960 p += 3; 1961 1962 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites); 1963 } 1964 1965 c->enabled = c->wpa_version ? 1 : 0; 1966 } 1967 1968 if (wpa_pairwise[0]) 1969 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1970 1971 if (auth_algs[0]) 1972 { 1973 switch (atoi(auth_algs)) 1974 { 1975 case 1: 1976 c->auth_algs |= IWINFO_AUTH_OPEN; 1977 break; 1978 1979 case 2: 1980 c->auth_algs |= IWINFO_AUTH_SHARED; 1981 break; 1982 1983 case 3: 1984 c->auth_algs |= IWINFO_AUTH_OPEN; 1985 c->auth_algs |= IWINFO_AUTH_SHARED; 1986 break; 1987 } 1988 1989 c->pair_ciphers |= nl80211_check_wepkey(wep_key0); 1990 c->pair_ciphers |= nl80211_check_wepkey(wep_key1); 1991 c->pair_ciphers |= nl80211_check_wepkey(wep_key2); 1992 c->pair_ciphers |= nl80211_check_wepkey(wep_key3); 1993 1994 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0; 1995 } 1996 1997 c->group_ciphers = c->pair_ciphers; 1998 1999 return 0; 2000 } 2001 2002 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */ 2003 else if (!nl80211_get_mode(ifname, &opmode) && 2004 (opmode == IWINFO_OPMODE_ADHOC || 2005 opmode == IWINFO_OPMODE_MESHPOINT)) 2006 { 2007 c->enabled = 0; 2008 2009 return 0; 2010 } 2011 2012 2013 return -1; 2014 } 2015 2016 static int nl80211_get_phyname(const char *ifname, char *buf) 2017 { 2018 const char *name; 2019 2020 name = nl80211_ifname2phy(ifname); 2021 2022 if (name) 2023 { 2024 strcpy(buf, name); 2025 return 0; 2026 } 2027 else if ((name = nl80211_phy2ifname(ifname)) != NULL) 2028 { 2029 name = nl80211_ifname2phy(name); 2030 2031 if (name) 2032 { 2033 strcpy(buf, ifname); 2034 return 0; 2035 } 2036 } 2037 2038 return -1; 2039 } 2040 2041 2042 static void nl80211_parse_rateinfo(struct nlattr **ri, 2043 struct iwinfo_rate_entry *re) 2044 { 2045 if (ri[NL80211_RATE_INFO_BITRATE32]) 2046 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100; 2047 else if (ri[NL80211_RATE_INFO_BITRATE]) 2048 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100; 2049 2050 if (ri[NL80211_RATE_INFO_HE_MCS]) 2051 { 2052 re->is_he = 1; 2053 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]); 2054 2055 if (ri[NL80211_RATE_INFO_HE_NSS]) 2056 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]); 2057 if (ri[NL80211_RATE_INFO_HE_GI]) 2058 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]); 2059 if (ri[NL80211_RATE_INFO_HE_DCM]) 2060 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]); 2061 } 2062 else if (ri[NL80211_RATE_INFO_VHT_MCS]) 2063 { 2064 re->is_vht = 1; 2065 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]); 2066 2067 if (ri[NL80211_RATE_INFO_VHT_NSS]) 2068 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]); 2069 } 2070 else if (ri[NL80211_RATE_INFO_MCS]) 2071 { 2072 re->is_ht = 1; 2073 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]); 2074 } 2075 2076 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH]) 2077 re->mhz = 5; 2078 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH]) 2079 re->mhz = 10; 2080 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH]) 2081 re->mhz = 40; 2082 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH]) 2083 re->mhz = 80; 2084 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] || 2085 ri[NL80211_RATE_INFO_160_MHZ_WIDTH]) 2086 re->mhz = 160; 2087 else 2088 re->mhz = 20; 2089 2090 if (ri[NL80211_RATE_INFO_SHORT_GI]) 2091 re->is_short_gi = 1; 2092 2093 re->is_40mhz = (re->mhz == 40); 2094 } 2095 2096 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg) 2097 { 2098 struct nl80211_array_buf *arr = arg; 2099 struct iwinfo_survey_entry *e = arr->buf; 2100 struct nlattr **attr = nl80211_parse(msg); 2101 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1]; 2102 int rc; 2103 2104 static const struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = { 2105 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 2106 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 2107 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 }, 2108 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 }, 2109 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 }, 2110 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 }, 2111 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 }, 2112 }; 2113 2114 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX, 2115 attr[NL80211_ATTR_SURVEY_INFO], 2116 survey_policy); 2117 if (rc) 2118 return NL_SKIP; 2119 2120 /* advance to end of array */ 2121 e += arr->count; 2122 memset(e, 0, sizeof(*e)); 2123 2124 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY]) 2125 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]); 2126 2127 if (sinfo[NL80211_SURVEY_INFO_NOISE]) 2128 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]); 2129 2130 if (sinfo[NL80211_SURVEY_INFO_TIME]) 2131 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]); 2132 2133 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY]) 2134 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]); 2135 2136 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]) 2137 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]); 2138 2139 if (sinfo[NL80211_SURVEY_INFO_TIME_RX]) 2140 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]); 2141 2142 if (sinfo[NL80211_SURVEY_INFO_TIME_TX]) 2143 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]); 2144 2145 arr->count++; 2146 return NL_SKIP; 2147 } 2148 2149 2150 static void plink_state_to_str(char *dst, unsigned state) 2151 { 2152 switch (state) { 2153 case NL80211_PLINK_LISTEN: 2154 strcpy(dst, "LISTEN"); 2155 break; 2156 case NL80211_PLINK_OPN_SNT: 2157 strcpy(dst, "OPN_SNT"); 2158 break; 2159 case NL80211_PLINK_OPN_RCVD: 2160 strcpy(dst, "OPN_RCVD"); 2161 break; 2162 case NL80211_PLINK_CNF_RCVD: 2163 strcpy(dst, "CNF_RCVD"); 2164 break; 2165 case NL80211_PLINK_ESTAB: 2166 strcpy(dst, "ESTAB"); 2167 break; 2168 case NL80211_PLINK_HOLDING: 2169 strcpy(dst, "HOLDING"); 2170 break; 2171 case NL80211_PLINK_BLOCKED: 2172 strcpy(dst, "BLOCKED"); 2173 break; 2174 default: 2175 strcpy(dst, "UNKNOWN"); 2176 break; 2177 } 2178 } 2179 2180 static void power_mode_to_str(char *dst, struct nlattr *a) 2181 { 2182 enum nl80211_mesh_power_mode pm = nla_get_u32(a); 2183 2184 switch (pm) { 2185 case NL80211_MESH_POWER_ACTIVE: 2186 strcpy(dst, "ACTIVE"); 2187 break; 2188 case NL80211_MESH_POWER_LIGHT_SLEEP: 2189 strcpy(dst, "LIGHT SLEEP"); 2190 break; 2191 case NL80211_MESH_POWER_DEEP_SLEEP: 2192 strcpy(dst, "DEEP SLEEP"); 2193 break; 2194 default: 2195 strcpy(dst, "UNKNOWN"); 2196 break; 2197 } 2198 } 2199 2200 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg) 2201 { 2202 struct nl80211_array_buf *arr = arg; 2203 struct iwinfo_assoclist_entry *e = arr->buf; 2204 struct nlattr **attr = nl80211_parse(msg); 2205 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 2206 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 2207 struct nl80211_sta_flag_update *sta_flags; 2208 2209 static const struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 2210 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 2211 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 2212 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 2213 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED }, 2214 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 2215 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 2216 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 }, 2217 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 2218 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 2219 [NL80211_STA_INFO_RX_BYTES64] = { .type = NLA_U64 }, 2220 [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 }, 2221 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 }, 2222 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 }, 2223 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 }, 2224 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 }, 2225 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 }, 2226 [NL80211_STA_INFO_STA_FLAGS] = 2227 { .minlen = sizeof(struct nl80211_sta_flag_update) }, 2228 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 }, 2229 /* mesh */ 2230 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 2231 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 2232 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 2233 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 }, 2234 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 }, 2235 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 }, 2236 }; 2237 2238 static const struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 2239 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 2240 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 2241 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 2242 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 2243 }; 2244 2245 /* advance to end of array */ 2246 e += arr->count; 2247 memset(e, 0, sizeof(*e)); 2248 2249 if (attr[NL80211_ATTR_MAC]) 2250 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6); 2251 2252 if (attr[NL80211_ATTR_STA_INFO] && 2253 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 2254 attr[NL80211_ATTR_STA_INFO], stats_policy)) 2255 { 2256 if (sinfo[NL80211_STA_INFO_SIGNAL]) 2257 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 2258 2259 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG]) 2260 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]); 2261 2262 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME]) 2263 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]); 2264 2265 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME]) 2266 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]); 2267 2268 if (sinfo[NL80211_STA_INFO_RX_PACKETS]) 2269 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]); 2270 2271 if (sinfo[NL80211_STA_INFO_TX_PACKETS]) 2272 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]); 2273 2274 if (sinfo[NL80211_STA_INFO_RX_BITRATE] && 2275 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2276 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy)) 2277 nl80211_parse_rateinfo(rinfo, &e->rx_rate); 2278 2279 if (sinfo[NL80211_STA_INFO_TX_BITRATE] && 2280 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2281 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy)) 2282 nl80211_parse_rateinfo(rinfo, &e->tx_rate); 2283 2284 if (sinfo[NL80211_STA_INFO_RX_BYTES64]) 2285 e->rx_bytes = nla_get_u64(sinfo[NL80211_STA_INFO_RX_BYTES64]); 2286 else if (sinfo[NL80211_STA_INFO_RX_BYTES]) 2287 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]); 2288 2289 if (sinfo[NL80211_STA_INFO_TX_BYTES64]) 2290 e->tx_bytes = nla_get_u64(sinfo[NL80211_STA_INFO_TX_BYTES64]); 2291 else if (sinfo[NL80211_STA_INFO_TX_BYTES]) 2292 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]); 2293 2294 if (sinfo[NL80211_STA_INFO_TX_RETRIES]) 2295 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]); 2296 2297 if (sinfo[NL80211_STA_INFO_TX_FAILED]) 2298 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]); 2299 2300 if (sinfo[NL80211_STA_INFO_T_OFFSET]) 2301 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]); 2302 2303 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC]) 2304 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]); 2305 2306 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]) 2307 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]); 2308 2309 /* mesh */ 2310 if (sinfo[NL80211_STA_INFO_LLID]) 2311 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]); 2312 2313 if (sinfo[NL80211_STA_INFO_PLID]) 2314 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]); 2315 2316 if (sinfo[NL80211_STA_INFO_PLINK_STATE]) 2317 plink_state_to_str(e->plink_state, 2318 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE])); 2319 2320 if (sinfo[NL80211_STA_INFO_LOCAL_PM]) 2321 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]); 2322 if (sinfo[NL80211_STA_INFO_PEER_PM]) 2323 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]); 2324 if (sinfo[NL80211_STA_INFO_NONPEER_PM]) 2325 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]); 2326 2327 /* Station flags */ 2328 if (sinfo[NL80211_STA_INFO_STA_FLAGS]) 2329 { 2330 sta_flags = (struct nl80211_sta_flag_update *) 2331 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]); 2332 2333 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) && 2334 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED)) 2335 e->is_authorized = 1; 2336 2337 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) && 2338 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) 2339 e->is_authenticated = 1; 2340 2341 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) && 2342 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) 2343 e->is_preamble_short = 1; 2344 2345 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) && 2346 sta_flags->set & BIT(NL80211_STA_FLAG_WME)) 2347 e->is_wme = 1; 2348 2349 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) && 2350 sta_flags->set & BIT(NL80211_STA_FLAG_MFP)) 2351 e->is_mfp = 1; 2352 2353 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) && 2354 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER)) 2355 e->is_tdls = 1; 2356 } 2357 } 2358 2359 e->noise = 0; /* filled in by caller */ 2360 arr->count++; 2361 2362 return NL_SKIP; 2363 } 2364 2365 static int nl80211_get_survey(const char *ifname, char *buf, int *len) 2366 { 2367 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2368 int rc; 2369 2370 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY, 2371 NLM_F_DUMP, nl80211_get_survey_cb, &arr); 2372 if (!rc) 2373 *len = (arr.count * sizeof(struct iwinfo_survey_entry)); 2374 else 2375 *len = 0; 2376 2377 return 0; 2378 } 2379 2380 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len) 2381 { 2382 DIR *d; 2383 int i, noise = 0; 2384 struct dirent *de; 2385 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2386 struct iwinfo_assoclist_entry *e; 2387 2388 if ((d = opendir("/sys/class/net")) != NULL) 2389 { 2390 while ((de = readdir(d)) != NULL) 2391 { 2392 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 2393 (!de->d_name[strlen(ifname)] || 2394 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 2395 { 2396 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 2397 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr); 2398 } 2399 } 2400 2401 closedir(d); 2402 2403 if (!nl80211_get_noise(ifname, &noise)) 2404 for (i = 0, e = arr.buf; i < arr.count; i++, e++) 2405 e->noise = noise; 2406 2407 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry)); 2408 return 0; 2409 } 2410 2411 return -1; 2412 } 2413 2414 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg) 2415 { 2416 int *dbm_max = arg; 2417 int ch_cur, ch_cmp, bands_remain, freqs_remain; 2418 2419 struct nlattr **attr = nl80211_parse(msg); 2420 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2421 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2422 struct nlattr *band, *freq; 2423 2424 static const struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = { 2425 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 }, 2426 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG }, 2427 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG }, 2428 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG }, 2429 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG }, 2430 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 }, 2431 }; 2432 2433 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */ 2434 *dbm_max = -1; 2435 2436 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2437 { 2438 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), 2439 nla_len(band), NULL); 2440 2441 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 2442 { 2443 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2444 nla_data(freq), nla_len(freq), freq_policy); 2445 2446 ch_cmp = nl80211_freq2channel(nla_get_u32( 2447 freqs[NL80211_FREQUENCY_ATTR_FREQ])); 2448 2449 if ((!ch_cur || (ch_cmp == ch_cur)) && 2450 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) 2451 { 2452 *dbm_max = (int)(0.01 * nla_get_u32( 2453 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])); 2454 2455 break; 2456 } 2457 } 2458 } 2459 2460 return NL_SKIP; 2461 } 2462 2463 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len) 2464 { 2465 int err, ch_cur; 2466 int dbm_max = -1, dbm_cur, dbm_cnt; 2467 struct iwinfo_txpwrlist_entry entry; 2468 2469 if (nl80211_get_channel(ifname, &ch_cur)) 2470 ch_cur = 0; 2471 2472 /* initialize the value pointer with channel for callback */ 2473 dbm_max = ch_cur; 2474 2475 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 2476 nl80211_get_txpwrlist_cb, &dbm_max); 2477 2478 if (!err) 2479 { 2480 for (dbm_cur = 0, dbm_cnt = 0; 2481 dbm_cur < dbm_max; 2482 dbm_cur++, dbm_cnt++) 2483 { 2484 entry.dbm = dbm_cur; 2485 entry.mw = iwinfo_dbm2mw(dbm_cur); 2486 2487 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2488 } 2489 2490 entry.dbm = dbm_max; 2491 entry.mw = iwinfo_dbm2mw(dbm_max); 2492 2493 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2494 dbm_cnt++; 2495 2496 *len = dbm_cnt * sizeof(entry); 2497 return 0; 2498 } 2499 2500 return -1; 2501 } 2502 2503 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c) 2504 { 2505 int wpa_version = 0; 2506 char *p, *q, *proto, *suites; 2507 2508 c->enabled = 0; 2509 2510 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) { 2511 if (!strcmp(p, "WEP")) { 2512 c->enabled = 1; 2513 c->auth_suites = IWINFO_KMGMT_NONE; 2514 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2515 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2516 break; 2517 } 2518 2519 proto = strtok(p, "-"); 2520 suites = strtok(NULL, "]"); 2521 2522 if (!proto || !suites) 2523 continue; 2524 2525 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN")) 2526 wpa_version = 2; 2527 else if (!strcmp(proto, "WPA")) 2528 wpa_version = 1; 2529 else 2530 continue; 2531 2532 c->enabled = 1; 2533 2534 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites); 2535 parse_wpa_ciphers(suites, &c->pair_ciphers); 2536 } 2537 } 2538 2539 2540 struct nl80211_scanlist { 2541 struct iwinfo_scanlist_entry *e; 2542 int len; 2543 }; 2544 2545 2546 static void nl80211_get_scanlist_ie(struct nlattr **bss, 2547 struct iwinfo_scanlist_entry *e) 2548 { 2549 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2550 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2551 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; 2552 int len; 2553 2554 while (ielen >= 2 && ielen >= ie[1]) 2555 { 2556 switch (ie[0]) 2557 { 2558 case 0: /* SSID */ 2559 case 114: /* Mesh ID */ 2560 if (e->ssid[0] == 0) { 2561 len = min(ie[1], IWINFO_ESSID_MAX_SIZE); 2562 memcpy(e->ssid, ie + 2, len); 2563 e->ssid[len] = 0; 2564 } 2565 break; 2566 2567 case 48: /* RSN */ 2568 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1], 2569 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x); 2570 break; 2571 2572 case 221: /* Vendor */ 2573 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1) 2574 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4, 2575 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK); 2576 break; 2577 case 61: /* HT operation */ 2578 if (ie[1] >= 3) { 2579 e->ht_chan_info.primary_chan = ie[2]; 2580 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3; 2581 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2; 2582 } 2583 break; 2584 case 192: /* VHT operation */ 2585 if (ie[1] >= 3) { 2586 e->vht_chan_info.chan_width = ie[2]; 2587 e->vht_chan_info.center_chan_1 = ie[3]; 2588 e->vht_chan_info.center_chan_2 = ie[4]; 2589 } 2590 break; 2591 } 2592 2593 ielen -= ie[1] + 2; 2594 ie += ie[1] + 2; 2595 } 2596 } 2597 2598 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg) 2599 { 2600 int8_t rssi; 2601 uint16_t caps; 2602 2603 struct nl80211_scanlist *sl = arg; 2604 struct nlattr **tb = nl80211_parse(msg); 2605 struct nlattr *bss[NL80211_BSS_MAX + 1]; 2606 2607 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 2608 [NL80211_BSS_TSF] = { .type = NLA_U64 }, 2609 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 2610 [NL80211_BSS_BSSID] = { 0 }, 2611 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, 2612 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, 2613 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 2614 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, 2615 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, 2616 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 2617 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 }, 2618 [NL80211_BSS_BEACON_IES] = { 0 }, 2619 }; 2620 2621 if (!tb[NL80211_ATTR_BSS] || 2622 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 2623 bss_policy) || 2624 !bss[NL80211_BSS_BSSID]) 2625 { 2626 return NL_SKIP; 2627 } 2628 2629 if (bss[NL80211_BSS_CAPABILITY]) 2630 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); 2631 else 2632 caps = 0; 2633 2634 memset(sl->e, 0, sizeof(*sl->e)); 2635 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6); 2636 2637 if (caps & (1<<1)) 2638 sl->e->mode = IWINFO_OPMODE_ADHOC; 2639 else if (caps & (1<<0)) 2640 sl->e->mode = IWINFO_OPMODE_MASTER; 2641 else 2642 sl->e->mode = IWINFO_OPMODE_MESHPOINT; 2643 2644 if (caps & (1<<4)) 2645 sl->e->crypto.enabled = 1; 2646 2647 if (bss[NL80211_BSS_FREQUENCY]) 2648 { 2649 sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]); 2650 sl->e->band = nl80211_freq2band(sl->e->mhz); 2651 sl->e->channel = nl80211_freq2channel(sl->e->mhz); 2652 } 2653 2654 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) 2655 nl80211_get_scanlist_ie(bss, sl->e); 2656 2657 if (bss[NL80211_BSS_SIGNAL_MBM]) 2658 { 2659 sl->e->signal = 2660 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100); 2661 2662 rssi = sl->e->signal - 0x100; 2663 2664 if (rssi < -110) 2665 rssi = -110; 2666 else if (rssi > -40) 2667 rssi = -40; 2668 2669 sl->e->quality = (rssi + 110); 2670 sl->e->quality_max = 70; 2671 } 2672 2673 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version) 2674 { 2675 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2676 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2677 } 2678 2679 sl->e++; 2680 sl->len++; 2681 2682 return NL_SKIP; 2683 } 2684 2685 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len) 2686 { 2687 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf }; 2688 2689 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL)) 2690 goto out; 2691 2692 if (nl80211_wait("nl80211", "scan", 2693 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED)) 2694 goto out; 2695 2696 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 2697 nl80211_get_scanlist_cb, &sl)) 2698 goto out; 2699 2700 *len = sl.len * sizeof(struct iwinfo_scanlist_entry); 2701 return 0; 2702 2703 out: 2704 *len = 0; 2705 return -1; 2706 } 2707 2708 static int wpasupp_ssid_decode(const char *in, char *out, int outlen) 2709 { 2710 #define hex(x) \ 2711 (((x) >= 'a') ? ((x) - 'a' + 10) : \ 2712 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - ''))) 2713 2714 int len = 0; 2715 2716 while (*in) 2717 { 2718 if (len + 1 >= outlen) 2719 break; 2720 2721 switch (*in) 2722 { 2723 case '\\': 2724 in++; 2725 switch (*in) 2726 { 2727 case 'n': 2728 out[len++] = '\n'; in++; 2729 break; 2730 2731 case 'r': 2732 out[len++] = '\r'; in++; 2733 break; 2734 2735 case 't': 2736 out[len++] = '\t'; in++; 2737 break; 2738 2739 case 'e': 2740 out[len++] = '\033'; in++; 2741 break; 2742 2743 case 'x': 2744 if (isxdigit(*(in+1)) && isxdigit(*(in+2))) 2745 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2)); 2746 in += 3; 2747 break; 2748 2749 default: 2750 out[len++] = *in++; 2751 break; 2752 } 2753 break; 2754 2755 default: 2756 out[len++] = *in++; 2757 break; 2758 } 2759 } 2760 2761 if (outlen > len) 2762 out[len] = '\0'; 2763 2764 return len; 2765 } 2766 2767 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len) 2768 { 2769 int sock, qmax, rssi, tries, count = -1, ready = 0; 2770 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096]; 2771 struct sockaddr_un local = { 0 }; 2772 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf; 2773 2774 sock = nl80211_wpactl_connect(ifname, &local); 2775 2776 if (sock < 0) 2777 return sock; 2778 2779 send(sock, "ATTACH", 6, 0); 2780 send(sock, "SCAN", 4, 0); 2781 2782 /* 2783 * wait for scan results: 2784 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan 2785 * 72 channels at most. We'll also receive two "OK" messages acknowledging 2786 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra 2787 * time to process the results, so try 72 + 2 + 1 times. 2788 */ 2789 for (tries = 0; tries < 75; tries++) 2790 { 2791 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0) 2792 continue; 2793 2794 /* got an event notification */ 2795 if (reply[0] == '<') 2796 { 2797 /* scan results are ready */ 2798 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS")) 2799 { 2800 /* send "SCAN_RESULTS" command */ 2801 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12); 2802 break; 2803 } 2804 2805 /* is another unrelated event, retry */ 2806 tries--; 2807 } 2808 2809 /* scanning already in progress, keep awaiting results */ 2810 else if (!strcmp(reply, "FAIL-BUSY\n")) 2811 { 2812 tries--; 2813 } 2814 2815 /* another failure, abort */ 2816 else if (!strncmp(reply, "FAIL-", 5)) 2817 { 2818 break; 2819 } 2820 } 2821 2822 /* receive and parse scan results if the wait above didn't time out */ 2823 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0) 2824 { 2825 /* received an event notification, receive again */ 2826 if (reply[0] == '<') 2827 continue; 2828 2829 nl80211_get_quality_max(ifname, &qmax); 2830 2831 for (line = strtok_r(reply, "\n", &pos); 2832 line != NULL; 2833 line = strtok_r(NULL, "\n", &pos)) 2834 { 2835 /* skip header line */ 2836 if (count < 0) 2837 { 2838 count++; 2839 continue; 2840 } 2841 2842 bssid = strtok(line, "\t"); 2843 freq = strtok(NULL, "\t"); 2844 signal = strtok(NULL, "\t"); 2845 flags = strtok(NULL, "\t"); 2846 ssid = strtok(NULL, "\n"); 2847 2848 if (!bssid || !freq || !signal || !flags) 2849 continue; 2850 2851 /* BSSID */ 2852 e->mac[0] = strtol(&bssid[0], NULL, 16); 2853 e->mac[1] = strtol(&bssid[3], NULL, 16); 2854 e->mac[2] = strtol(&bssid[6], NULL, 16); 2855 e->mac[3] = strtol(&bssid[9], NULL, 16); 2856 e->mac[4] = strtol(&bssid[12], NULL, 16); 2857 e->mac[5] = strtol(&bssid[15], NULL, 16); 2858 2859 /* SSID */ 2860 if (ssid) 2861 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid)); 2862 else 2863 e->ssid[0] = 0; 2864 2865 /* Mode */ 2866 if (strstr(flags, "[MESH]")) 2867 e->mode = IWINFO_OPMODE_MESHPOINT; 2868 else if (strstr(flags, "[IBSS]")) 2869 e->mode = IWINFO_OPMODE_ADHOC; 2870 else 2871 e->mode = IWINFO_OPMODE_MASTER; 2872 2873 /* Channel */ 2874 e->mhz = atoi(freq); 2875 e->band = nl80211_freq2band(e->mhz); 2876 e->channel = nl80211_freq2channel(e->mhz); 2877 2878 /* Signal */ 2879 rssi = atoi(signal); 2880 e->signal = rssi; 2881 2882 /* Quality */ 2883 if (rssi < 0) 2884 { 2885 /* The cfg80211 wext compat layer assumes a signal range 2886 * of -110 dBm to -40 dBm, the quality value is derived 2887 * by adding 110 to the signal level */ 2888 if (rssi < -110) 2889 rssi = -110; 2890 else if (rssi > -40) 2891 rssi = -40; 2892 2893 e->quality = (rssi + 110); 2894 } 2895 else 2896 { 2897 e->quality = rssi; 2898 } 2899 2900 /* Max. Quality */ 2901 e->quality_max = qmax; 2902 2903 /* Crypto */ 2904 nl80211_get_scancrypto(flags, &e->crypto); 2905 2906 count++; 2907 e++; 2908 } 2909 2910 *len = count * sizeof(struct iwinfo_scanlist_entry); 2911 break; 2912 } 2913 2914 close(sock); 2915 unlink(local.sun_path); 2916 2917 return (count >= 0) ? 0 : -1; 2918 } 2919 2920 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len) 2921 { 2922 char *res; 2923 int rv, mode; 2924 2925 *len = 0; 2926 2927 /* Got a radioX pseudo interface, find some interface on it or create one */ 2928 if (!strncmp(ifname, "radio", 5)) 2929 { 2930 /* Reuse existing interface */ 2931 if ((res = nl80211_phy2ifname(ifname)) != NULL) 2932 { 2933 return nl80211_get_scanlist(res, buf, len); 2934 } 2935 2936 /* Need to spawn a temporary iface for scanning */ 2937 else if ((res = nl80211_ifadd(ifname)) != NULL) 2938 { 2939 rv = nl80211_get_scanlist(res, buf, len); 2940 nl80211_ifdel(res); 2941 return rv; 2942 } 2943 } 2944 2945 /* WPA supplicant */ 2946 if (!nl80211_get_scanlist_wpactl(ifname, buf, len)) 2947 { 2948 return 0; 2949 } 2950 2951 /* station / ad-hoc / monitor scan */ 2952 else if (!nl80211_get_mode(ifname, &mode) && 2953 (mode == IWINFO_OPMODE_ADHOC || 2954 mode == IWINFO_OPMODE_MASTER || 2955 mode == IWINFO_OPMODE_CLIENT || 2956 mode == IWINFO_OPMODE_MONITOR) && 2957 iwinfo_ifup(ifname)) 2958 { 2959 return nl80211_get_scanlist_nl(ifname, buf, len); 2960 } 2961 2962 /* AP scan */ 2963 else 2964 { 2965 /* Got a temp interface, don't create yet another one */ 2966 if (!strncmp(ifname, "tmp.", 4)) 2967 { 2968 if (!iwinfo_ifup(ifname)) 2969 return -1; 2970 2971 rv = nl80211_get_scanlist_nl(ifname, buf, len); 2972 iwinfo_ifdown(ifname); 2973 return rv; 2974 } 2975 2976 /* Spawn a new scan interface */ 2977 else 2978 { 2979 if (!(res = nl80211_ifadd(ifname))) 2980 return -1; 2981 2982 iwinfo_ifmac(res); 2983 2984 /* if we can take the new interface up, the driver supports an 2985 * additional interface and there's no need to tear down the ap */ 2986 if (iwinfo_ifup(res)) 2987 { 2988 rv = nl80211_get_scanlist_nl(res, buf, len); 2989 iwinfo_ifdown(res); 2990 } 2991 2992 /* driver cannot create secondary interface, take down ap 2993 * during scan */ 2994 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res)) 2995 { 2996 rv = nl80211_get_scanlist_nl(res, buf, len); 2997 iwinfo_ifdown(res); 2998 iwinfo_ifup(ifname); 2999 nl80211_hostapd_hup(ifname); 3000 } 3001 else 3002 rv = -1; 3003 3004 nl80211_ifdel(res); 3005 return rv; 3006 } 3007 } 3008 3009 return -1; 3010 } 3011 3012 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg) 3013 { 3014 int bands_remain, freqs_remain; 3015 3016 struct nl80211_array_buf *arr = arg; 3017 struct iwinfo_freqlist_entry *e; 3018 3019 struct nlattr **attr = nl80211_parse(msg); 3020 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 3021 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 3022 struct nlattr *band, *freq; 3023 3024 e = arr->buf; 3025 e += arr->count; 3026 3027 if (attr[NL80211_ATTR_WIPHY_BANDS]) { 3028 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 3029 { 3030 nla_parse(bands, NL80211_BAND_ATTR_MAX, 3031 nla_data(band), nla_len(band), NULL); 3032 3033 if (bands[NL80211_BAND_ATTR_FREQS]) { 3034 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 3035 { 3036 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 3037 nla_data(freq), nla_len(freq), NULL); 3038 3039 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] || 3040 freqs[NL80211_FREQUENCY_ATTR_DISABLED]) 3041 continue; 3042 3043 e->band = nl80211_get_band(band->nla_type); 3044 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]); 3045 e->channel = nl80211_freq2channel(e->mhz); 3046 3047 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS]) 3048 e->flags |= IWINFO_FREQ_NO_HT40MINUS; 3049 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS]) 3050 e->flags |= IWINFO_FREQ_NO_HT40PLUS; 3051 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ]) 3052 e->flags |= IWINFO_FREQ_NO_80MHZ; 3053 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ]) 3054 e->flags |= IWINFO_FREQ_NO_160MHZ; 3055 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ]) 3056 e->flags |= IWINFO_FREQ_NO_20MHZ; 3057 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ]) 3058 e->flags |= IWINFO_FREQ_NO_10MHZ; 3059 if (freqs[NL80211_FREQUENCY_ATTR_NO_HE]) 3060 e->flags |= IWINFO_FREQ_NO_HE; 3061 if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] && 3062 !freqs[NL80211_FREQUENCY_ATTR_RADAR]) 3063 e->flags |= IWINFO_FREQ_NO_IR; 3064 if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY]) 3065 e->flags |= IWINFO_FREQ_INDOOR_ONLY; 3066 3067 /* keep backwards compatibility */ 3068 e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0; 3069 3070 e++; 3071 arr->count++; 3072 } 3073 } 3074 } 3075 } 3076 3077 return NL_SKIP; 3078 } 3079 3080 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len) 3081 { 3082 struct nl80211_msg_conveyor *cv; 3083 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 3084 uint32_t features = nl80211_get_protocol_features(ifname); 3085 int flags; 3086 3087 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3088 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3089 if (!cv) 3090 goto out; 3091 3092 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3093 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr)) 3094 goto out; 3095 3096 *len = arr.count * sizeof(struct iwinfo_freqlist_entry); 3097 return 0; 3098 3099 nla_put_failure: 3100 nl80211_free(cv); 3101 out: 3102 *len = 0; 3103 return -1; 3104 } 3105 3106 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg) 3107 { 3108 char *buf = arg; 3109 struct nlattr **attr = nl80211_parse(msg); 3110 3111 if (attr[NL80211_ATTR_REG_ALPHA2]) 3112 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2); 3113 else 3114 buf[0] = 0; 3115 3116 return NL_SKIP; 3117 } 3118 3119 static int nl80211_get_country(const char *ifname, char *buf) 3120 { 3121 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0, 3122 nl80211_get_country_cb, buf)) 3123 return -1; 3124 3125 return 0; 3126 } 3127 3128 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len) 3129 { 3130 int count; 3131 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf; 3132 const struct iwinfo_iso3166_label *l; 3133 3134 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++) 3135 { 3136 e->iso3166 = l->iso3166; 3137 e->ccode[0] = (l->iso3166 / 256); 3138 e->ccode[1] = (l->iso3166 % 256); 3139 e->ccode[2] = 0; 3140 } 3141 3142 *len = (count * sizeof(struct iwinfo_country_entry)); 3143 return 0; 3144 } 3145 3146 3147 struct nl80211_modes 3148 { 3149 bool ok; 3150 uint32_t hw; 3151 uint32_t ht; 3152 3153 uint8_t bands; 3154 3155 uint16_t nl_ht; 3156 uint32_t nl_vht; 3157 uint16_t he_phy_cap[6]; 3158 }; 3159 3160 static void nl80211_eval_modelist(struct nl80211_modes *m) 3161 { 3162 /* Treat any nonzero capability as 11n */ 3163 if (m->nl_ht > 0) 3164 { 3165 m->hw |= IWINFO_80211_N; 3166 m->ht |= IWINFO_HTMODE_HT20; 3167 3168 if (m->nl_ht & (1 << 1)) 3169 m->ht |= IWINFO_HTMODE_HT40; 3170 } 3171 3172 if (m->he_phy_cap[0] != 0) { 3173 m->hw |= IWINFO_80211_AX; 3174 m->ht |= IWINFO_HTMODE_HE20; 3175 3176 if (m->he_phy_cap[0] & BIT(9)) 3177 m->ht |= IWINFO_HTMODE_HE40; 3178 if (m->he_phy_cap[0] & BIT(10)) 3179 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80; 3180 if (m->he_phy_cap[0] & BIT(11)) 3181 m->ht |= IWINFO_HTMODE_HE160; 3182 if (m->he_phy_cap[0] & BIT(12)) 3183 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80; 3184 } 3185 3186 if (m->bands & IWINFO_BAND_24) 3187 { 3188 m->hw |= IWINFO_80211_B; 3189 m->hw |= IWINFO_80211_G; 3190 } 3191 3192 if (m->bands & IWINFO_BAND_5) 3193 { 3194 /* Treat any nonzero capability as 11ac */ 3195 if (m->nl_vht > 0) 3196 { 3197 m->hw |= IWINFO_80211_AC; 3198 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80; 3199 3200 switch ((m->nl_vht >> 2) & 3) 3201 { 3202 case 2: 3203 m->ht |= IWINFO_HTMODE_VHT80_80; 3204 /* fall through */ 3205 3206 case 1: 3207 m->ht |= IWINFO_HTMODE_VHT160; 3208 } 3209 } 3210 else 3211 { 3212 m->hw |= IWINFO_80211_A; 3213 } 3214 } 3215 3216 if (m->bands & IWINFO_BAND_60) 3217 { 3218 m->hw |= IWINFO_80211_AD; 3219 } 3220 3221 } 3222 3223 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg) 3224 { 3225 struct nl80211_modes *m = arg; 3226 int bands_remain; 3227 struct nlattr **attr = nl80211_parse(msg); 3228 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 3229 struct nlattr *band; 3230 3231 if (attr[NL80211_ATTR_WIPHY_BANDS]) 3232 { 3233 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 3234 { 3235 m->bands |= nl80211_get_band(band->nla_type); 3236 3237 nla_parse(bands, NL80211_BAND_ATTR_MAX, 3238 nla_data(band), nla_len(band), NULL); 3239 3240 if (bands[NL80211_BAND_ATTR_HT_CAPA]) 3241 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]); 3242 3243 if (bands[NL80211_BAND_ATTR_VHT_CAPA]) 3244 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]); 3245 3246 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) { 3247 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1]; 3248 struct nlattr *nl_iftype; 3249 int rem_band; 3250 int len; 3251 3252 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) { 3253 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX, 3254 nla_data(nl_iftype), nla_len(nl_iftype), NULL); 3255 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) { 3256 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]); 3257 3258 if (len > sizeof(m->he_phy_cap) - 1) 3259 len = sizeof(m->he_phy_cap) - 1; 3260 memcpy(&((__u8 *)m->he_phy_cap)[1], 3261 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]), 3262 len); 3263 } 3264 } 3265 } 3266 } 3267 3268 m->ok = 1; 3269 } 3270 3271 return NL_SKIP; 3272 } 3273 3274 static int nl80211_get_hwmodelist(const char *ifname, int *buf) 3275 { 3276 struct nl80211_msg_conveyor *cv; 3277 struct nl80211_modes m = {}; 3278 uint32_t features = nl80211_get_protocol_features(ifname); 3279 int flags; 3280 3281 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3282 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3283 if (!cv) 3284 goto out; 3285 3286 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3287 if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) 3288 goto nla_put_failure; 3289 3290 nl80211_eval_modelist(&m); 3291 3292 *buf = m.hw; 3293 3294 return 0; 3295 3296 nla_put_failure: 3297 nl80211_free(cv); 3298 out: 3299 return -1; 3300 } 3301 3302 struct chan_info { 3303 int width; 3304 int mode; 3305 }; 3306 3307 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg) 3308 { 3309 struct nlattr **tb = nl80211_parse(msg); 3310 struct nlattr *cur; 3311 struct chan_info *chn = arg; 3312 3313 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH])) 3314 chn->width = nla_get_u32(cur); 3315 3316 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE])) 3317 chn->mode = nla_get_u32(cur); 3318 3319 return NL_SKIP; 3320 } 3321 3322 static int nl80211_get_htmode(const char *ifname, int *buf) 3323 { 3324 struct chan_info chn = { 0 }; 3325 char *res, b[2] = { 0 }; 3326 int err; 3327 bool he = false; 3328 3329 res = nl80211_phy2ifname(ifname); 3330 *buf = 0; 3331 3332 err = nl80211_request(res ? res : ifname, 3333 NL80211_CMD_GET_INTERFACE, 0, 3334 nl80211_get_htmode_cb, &chn); 3335 if (err) 3336 return -1; 3337 3338 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b))) 3339 he = b[0] == '1'; 3340 else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b))) 3341 he = b[0] == '6'; 3342 3343 switch (chn.width) { 3344 case NL80211_CHAN_WIDTH_20: 3345 if (he) 3346 *buf = IWINFO_HTMODE_HE20; 3347 else if (chn.mode == -1) 3348 *buf = IWINFO_HTMODE_VHT20; 3349 else 3350 *buf = IWINFO_HTMODE_HT20; 3351 break; 3352 case NL80211_CHAN_WIDTH_40: 3353 if (he) 3354 *buf = IWINFO_HTMODE_HE40; 3355 else if (chn.mode == -1) 3356 *buf = IWINFO_HTMODE_VHT40; 3357 else 3358 *buf = IWINFO_HTMODE_HT40; 3359 break; 3360 case NL80211_CHAN_WIDTH_80: 3361 if (he) 3362 *buf = IWINFO_HTMODE_HE80; 3363 else 3364 *buf = IWINFO_HTMODE_VHT80; 3365 break; 3366 case NL80211_CHAN_WIDTH_80P80: 3367 if (he) 3368 *buf = IWINFO_HTMODE_HE80_80; 3369 else 3370 *buf = IWINFO_HTMODE_VHT80_80; 3371 break; 3372 case NL80211_CHAN_WIDTH_160: 3373 if (he) 3374 *buf = IWINFO_HTMODE_HE160; 3375 else 3376 *buf = IWINFO_HTMODE_VHT160; 3377 break; 3378 case NL80211_CHAN_WIDTH_5: 3379 case NL80211_CHAN_WIDTH_10: 3380 case NL80211_CHAN_WIDTH_20_NOHT: 3381 *buf = IWINFO_HTMODE_NOHT; 3382 break; 3383 default: 3384 return -1; 3385 } 3386 3387 return 0; 3388 } 3389 3390 static int nl80211_get_htmodelist(const char *ifname, int *buf) 3391 { 3392 struct nl80211_msg_conveyor *cv; 3393 struct nl80211_modes m = {}; 3394 uint32_t features = nl80211_get_protocol_features(ifname); 3395 int flags; 3396 3397 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3398 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3399 if (!cv) 3400 goto out; 3401 3402 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3403 if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) 3404 goto nla_put_failure; 3405 3406 nl80211_eval_modelist(&m); 3407 3408 *buf = m.ht; 3409 3410 return 0; 3411 3412 nla_put_failure: 3413 nl80211_free(cv); 3414 out: 3415 return -1; 3416 } 3417 3418 3419 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg) 3420 { 3421 struct nlattr **attr = nl80211_parse(msg); 3422 struct nlattr *comb; 3423 int *ret = arg; 3424 int comb_rem, limit_rem, mode_rem; 3425 3426 *ret = 0; 3427 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS]) 3428 return NL_SKIP; 3429 3430 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem) 3431 { 3432 static const struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = { 3433 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED }, 3434 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 }, 3435 }; 3436 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1]; 3437 static const struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = { 3438 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED }, 3439 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 }, 3440 }; 3441 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1]; 3442 struct nlattr *limit; 3443 3444 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy); 3445 3446 if (!tb_comb[NL80211_IFACE_COMB_LIMITS]) 3447 continue; 3448 3449 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem) 3450 { 3451 struct nlattr *mode; 3452 3453 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy); 3454 3455 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] || 3456 !tb_limit[NL80211_IFACE_LIMIT_MAX]) 3457 continue; 3458 3459 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2) 3460 continue; 3461 3462 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) { 3463 if (nla_type(mode) == NL80211_IFTYPE_AP) 3464 *ret = 1; 3465 } 3466 } 3467 } 3468 3469 return NL_SKIP; 3470 } 3471 3472 static int nl80211_get_mbssid_support(const char *ifname, int *buf) 3473 { 3474 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 3475 nl80211_get_ifcomb_cb, buf)) 3476 return -1; 3477 3478 return 0; 3479 } 3480 3481 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname) 3482 { 3483 char *phy, path[PATH_MAX]; 3484 3485 /* Try to determine the phy name from the given interface */ 3486 phy = nl80211_ifname2phy(ifname); 3487 3488 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible", 3489 phy ? "ieee80211" : "net", phy ? phy : ifname); 3490 3491 if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0) 3492 return -1; 3493 3494 return 0; 3495 } 3496 3497 3498 static int nl80211_get_hardware_id(const char *ifname, char *buf) 3499 { 3500 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf; 3501 char *phy, num[8], path[PATH_MAX]; 3502 int i; 3503 3504 struct { const char *path; uint16_t *dest; } lookup[] = { 3505 { "vendor", &id->vendor_id }, 3506 { "device", &id->device_id }, 3507 { "subsystem_vendor", &id->subsystem_vendor_id }, 3508 { "subsystem_device", &id->subsystem_device_id }, 3509 { "../idVendor", &id->subsystem_vendor_id }, 3510 { "../idProduct", &id->subsystem_device_id } 3511 }; 3512 3513 memset(id, 0, sizeof(*id)); 3514 3515 /* Try to determine the phy name from the given interface */ 3516 phy = nl80211_ifname2phy(ifname); 3517 3518 for (i = 0; i < ARRAY_SIZE(lookup); i++) 3519 { 3520 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s", 3521 phy ? "ieee80211" : "net", 3522 phy ? phy : ifname, lookup[i].path); 3523 3524 if (nl80211_readstr(path, num, sizeof(num)) > 0) 3525 *lookup[i].dest = strtoul(num, NULL, 16); 3526 } 3527 3528 /* Failed to obtain hardware PCI/USB IDs... */ 3529 if (id->vendor_id == 0 && id->device_id == 0 && 3530 id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0) 3531 /* ... first fallback to FDT ... */ 3532 if (nl80211_hardware_id_from_fdt(id, ifname) == -1) 3533 /* ... then board config */ 3534 return iwinfo_hardware_id_from_mtd(id); 3535 3536 return 0; 3537 } 3538 3539 static const struct iwinfo_hardware_entry * 3540 nl80211_get_hardware_entry(const char *ifname) 3541 { 3542 struct iwinfo_hardware_id id; 3543 3544 if (nl80211_get_hardware_id(ifname, (char *)&id)) 3545 return NULL; 3546 3547 return iwinfo_hardware(&id); 3548 } 3549 3550 static int nl80211_get_hardware_name(const char *ifname, char *buf) 3551 { 3552 const struct iwinfo_hardware_entry *hw; 3553 3554 if (!(hw = nl80211_get_hardware_entry(ifname))) 3555 sprintf(buf, "Generic MAC80211"); 3556 else 3557 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name); 3558 3559 return 0; 3560 } 3561 3562 static int nl80211_get_txpower_offset(const char *ifname, int *buf) 3563 { 3564 const struct iwinfo_hardware_entry *hw; 3565 3566 if (!(hw = nl80211_get_hardware_entry(ifname))) 3567 return -1; 3568 3569 *buf = hw->txpower_offset; 3570 return 0; 3571 } 3572 3573 static int nl80211_get_frequency_offset(const char *ifname, int *buf) 3574 { 3575 const struct iwinfo_hardware_entry *hw; 3576 3577 if (!(hw = nl80211_get_hardware_entry(ifname))) 3578 return -1; 3579 3580 *buf = hw->frequency_offset; 3581 return 0; 3582 } 3583 3584 static int nl80211_lookup_phyname(const char *section, char *buf) 3585 { 3586 const char *name; 3587 int idx; 3588 3589 if (!strncmp(section, "path=", 5)) 3590 idx = nl80211_phy_idx_from_path(section + 5); 3591 else if (!strncmp(section, "macaddr=", 8)) 3592 idx = nl80211_phy_idx_from_macaddr(section + 8); 3593 else 3594 idx = nl80211_phy_idx_from_uci(section); 3595 3596 if (idx < 0) 3597 return -1; 3598 3599 name = nl80211_phyidx2name(idx); 3600 if (!name) 3601 return -1; 3602 3603 strcpy(buf, name); 3604 return 0; 3605 } 3606 3607 static int nl80211_phy_path(const char *phyname, const char **path) 3608 { 3609 if (strchr(phyname, '/')) 3610 return -1; 3611 3612 *path = nl80211_phy_path_str(phyname); 3613 if (!*path) 3614 return -1; 3615 3616 return 0; 3617 } 3618 3619 const struct iwinfo_ops nl80211_ops = { 3620 .name = "nl80211", 3621 .probe = nl80211_probe, 3622 .channel = nl80211_get_channel, 3623 .center_chan1 = nl80211_get_center_chan1, 3624 .center_chan2 = nl80211_get_center_chan2, 3625 .frequency = nl80211_get_frequency, 3626 .frequency_offset = nl80211_get_frequency_offset, 3627 .txpower = nl80211_get_txpower, 3628 .txpower_offset = nl80211_get_txpower_offset, 3629 .bitrate = nl80211_get_bitrate, 3630 .signal = nl80211_get_signal, 3631 .noise = nl80211_get_noise, 3632 .quality = nl80211_get_quality, 3633 .quality_max = nl80211_get_quality_max, 3634 .mbssid_support = nl80211_get_mbssid_support, 3635 .hwmodelist = nl80211_get_hwmodelist, 3636 .htmodelist = nl80211_get_htmodelist, 3637 .htmode = nl80211_get_htmode, 3638 .mode = nl80211_get_mode, 3639 .ssid = nl80211_get_ssid, 3640 .bssid = nl80211_get_bssid, 3641 .country = nl80211_get_country, 3642 .hardware_id = nl80211_get_hardware_id, 3643 .hardware_name = nl80211_get_hardware_name, 3644 .encryption = nl80211_get_encryption, 3645 .phyname = nl80211_get_phyname, 3646 .assoclist = nl80211_get_assoclist, 3647 .txpwrlist = nl80211_get_txpwrlist, 3648 .scanlist = nl80211_get_scanlist, 3649 .freqlist = nl80211_get_freqlist, 3650 .countrylist = nl80211_get_countrylist, 3651 .survey = nl80211_get_survey, 3652 .lookup_phy = nl80211_lookup_phyname, 3653 .phy_path = nl80211_phy_path, 3654 .close = nl80211_close 3655 }; 3656
This page was automatically generated by LXR 0.3.1. • OpenWrt