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 <limits.h> 26 #include <glob.h> 27 #include <fnmatch.h> 28 #include <stdarg.h> 29 #include <stdlib.h> 30 31 #include "iwinfo_nl80211.h" 32 33 #define min(x, y) ((x) < (y)) ? (x) : (y) 34 35 #define BIT(x) (1ULL<<(x)) 36 37 static struct nl80211_state *nls = NULL; 38 39 static void nl80211_close(void) 40 { 41 if (nls) 42 { 43 if (nls->nlctrl) 44 genl_family_put(nls->nlctrl); 45 46 if (nls->nl80211) 47 genl_family_put(nls->nl80211); 48 49 if (nls->nl_sock) 50 nl_socket_free(nls->nl_sock); 51 52 if (nls->nl_cache) 53 nl_cache_free(nls->nl_cache); 54 55 free(nls); 56 nls = NULL; 57 } 58 } 59 60 static int nl80211_init(void) 61 { 62 int err, fd; 63 64 if (!nls) 65 { 66 nls = malloc(sizeof(struct nl80211_state)); 67 if (!nls) { 68 err = -ENOMEM; 69 goto err; 70 } 71 72 memset(nls, 0, sizeof(*nls)); 73 74 nls->nl_sock = nl_socket_alloc(); 75 if (!nls->nl_sock) { 76 err = -ENOMEM; 77 goto err; 78 } 79 80 if (genl_connect(nls->nl_sock)) { 81 err = -ENOLINK; 82 goto err; 83 } 84 85 fd = nl_socket_get_fd(nls->nl_sock); 86 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) { 87 err = -EINVAL; 88 goto err; 89 } 90 91 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) { 92 err = -ENOMEM; 93 goto err; 94 } 95 96 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211"); 97 if (!nls->nl80211) { 98 err = -ENOENT; 99 goto err; 100 } 101 102 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl"); 103 if (!nls->nlctrl) { 104 err = -ENOENT; 105 goto err; 106 } 107 } 108 109 return 0; 110 111 112 err: 113 nl80211_close(); 114 return err; 115 } 116 117 static int nl80211_readint(const char *path) 118 { 119 int fd; 120 int rv = -1; 121 char buffer[16]; 122 123 if ((fd = open(path, O_RDONLY)) > -1) 124 { 125 if (read(fd, buffer, sizeof(buffer)) > 0) 126 rv = atoi(buffer); 127 128 close(fd); 129 } 130 131 return rv; 132 } 133 134 static int nl80211_readstr(const char *path, char *buffer, int length) 135 { 136 int fd; 137 int rv = -1; 138 139 if ((fd = open(path, O_RDONLY)) > -1) 140 { 141 if ((rv = read(fd, buffer, length - 1)) > 0) 142 { 143 if (buffer[rv - 1] == '\n') 144 rv--; 145 146 buffer[rv] = 0; 147 } 148 149 close(fd); 150 } 151 152 return rv; 153 } 154 155 156 static int nl80211_msg_error(struct sockaddr_nl *nla, 157 struct nlmsgerr *err, void *arg) 158 { 159 int *ret = arg; 160 *ret = err->error; 161 return NL_STOP; 162 } 163 164 static int nl80211_msg_finish(struct nl_msg *msg, void *arg) 165 { 166 int *ret = arg; 167 *ret = 0; 168 return NL_SKIP; 169 } 170 171 static int nl80211_msg_ack(struct nl_msg *msg, void *arg) 172 { 173 int *ret = arg; 174 *ret = 0; 175 return NL_STOP; 176 } 177 178 static int nl80211_msg_response(struct nl_msg *msg, void *arg) 179 { 180 return NL_SKIP; 181 } 182 183 static void nl80211_free(struct nl80211_msg_conveyor *cv) 184 { 185 if (cv) 186 { 187 if (cv->cb) 188 nl_cb_put(cv->cb); 189 190 if (cv->msg) 191 nlmsg_free(cv->msg); 192 193 cv->cb = NULL; 194 cv->msg = NULL; 195 } 196 } 197 198 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family, 199 int cmd, int flags) 200 { 201 static struct nl80211_msg_conveyor cv; 202 203 struct nl_msg *req = NULL; 204 struct nl_cb *cb = NULL; 205 206 req = nlmsg_alloc(); 207 if (!req) 208 goto err; 209 210 cb = nl_cb_alloc(NL_CB_DEFAULT); 211 if (!cb) 212 goto err; 213 214 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0); 215 216 cv.msg = req; 217 cv.cb = cb; 218 219 return &cv; 220 221 err: 222 if (req) 223 nlmsg_free(req); 224 225 return NULL; 226 } 227 228 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags) 229 { 230 if (nl80211_init() < 0) 231 return NULL; 232 233 return nl80211_new(nls->nlctrl, cmd, flags); 234 } 235 236 static const char *nl80211_phy_path_str(const char *phyname) 237 { 238 static char path[PATH_MAX]; 239 const char *prefix = "/sys/devices/"; 240 int prefix_len = strlen(prefix); 241 int buf_len, offset; 242 struct dirent *e; 243 char buf[128], *link; 244 int phy_id; 245 int seq = 0; 246 DIR *d; 247 248 if (strncmp(phyname, "phy", 3) != 0) 249 return NULL; 250 251 phy_id = atoi(phyname + 3); 252 buf_len = snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", phyname); 253 link = realpath(buf, path); 254 if (!link) 255 return NULL; 256 257 if (strncmp(link, prefix, prefix_len) != 0) 258 return NULL; 259 260 link += prefix_len; 261 262 prefix = "platform/"; 263 prefix_len = strlen(prefix); 264 if (!strncmp(link, prefix, prefix_len) && strstr(link, "/pci")) 265 link += prefix_len; 266 267 snprintf(buf + buf_len, sizeof(buf) - buf_len, "/ieee80211"); 268 d = opendir(buf); 269 if (!d) 270 return link; 271 272 while ((e = readdir(d)) != NULL) { 273 int cur_id; 274 275 if (strncmp(e->d_name, "phy", 3) != 0) 276 continue; 277 278 cur_id = atoi(e->d_name + 3); 279 if (cur_id >= phy_id) 280 continue; 281 282 seq++; 283 } 284 285 closedir(d); 286 287 if (!seq) 288 return link; 289 290 offset = link - path + strlen(link); 291 snprintf(path + offset, sizeof(path) - offset, "+%d", seq); 292 293 return link; 294 } 295 296 static int nl80211_phy_idx_from_path(const char *path) 297 { 298 char buf[128]; 299 struct dirent *e; 300 const char *cur_path; 301 int cur_path_len; 302 int path_len; 303 int idx = -1; 304 DIR *d; 305 306 if (!path) 307 return -1; 308 309 path_len = strlen(path); 310 if (!path_len) 311 return -1; 312 313 d = opendir("/sys/class/ieee80211"); 314 if (!d) 315 return -1; 316 317 while ((e = readdir(d)) != NULL) { 318 cur_path = nl80211_phy_path_str(e->d_name); 319 if (!cur_path) 320 continue; 321 322 cur_path_len = strlen(cur_path); 323 if (cur_path_len < path_len) 324 continue; 325 326 if (strcmp(cur_path + cur_path_len - path_len, path) != 0) 327 continue; 328 329 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name); 330 idx = nl80211_readint(buf); 331 332 if (idx >= 0) 333 break; 334 } 335 336 closedir(d); 337 338 return idx; 339 } 340 341 static int nl80211_phy_idx_from_macaddr(const char *opt) 342 { 343 char buf[128]; 344 int i, idx = -1; 345 glob_t gl; 346 347 if (!opt) 348 return -1; 349 350 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/ 351 if (glob(buf, 0, NULL, &gl)) 352 return -1; 353 354 for (i = 0; i < gl.gl_pathc; i++) 355 { 356 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]); 357 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0) 358 continue; 359 360 if (fnmatch(opt, buf, FNM_CASEFOLD)) 361 continue; 362 363 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]); 364 if ((idx = nl80211_readint(buf)) > -1) 365 break; 366 } 367 368 globfree(&gl); 369 370 return idx; 371 } 372 373 static int nl80211_phy_idx_from_phy(const char *opt) 374 { 375 char buf[128]; 376 377 if (!opt) 378 return -1; 379 380 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt); 381 return nl80211_readint(buf); 382 } 383 384 static int nl80211_phy_idx_from_uci(const char *name) 385 { 386 struct uci_section *s; 387 const char *opt; 388 int idx = -1; 389 390 s = iwinfo_uci_get_radio(name, "mac80211"); 391 if (!s) 392 goto out; 393 394 opt = uci_lookup_option_string(uci_ctx, s, "path"); 395 idx = nl80211_phy_idx_from_path(opt); 396 if (idx >= 0) 397 goto out; 398 399 opt = uci_lookup_option_string(uci_ctx, s, "macaddr"); 400 idx = nl80211_phy_idx_from_macaddr(opt); 401 if (idx >= 0) 402 goto out; 403 404 opt = uci_lookup_option_string(uci_ctx, s, "phy"); 405 idx = nl80211_phy_idx_from_phy(opt); 406 407 out: 408 iwinfo_uci_free(); 409 return idx; 410 } 411 412 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, 413 int cmd, int flags) 414 { 415 int ifidx = -1, phyidx = -1; 416 struct nl80211_msg_conveyor *cv; 417 418 if (ifname == NULL) 419 return NULL; 420 421 if (nl80211_init() < 0) 422 return NULL; 423 424 if (!strncmp(ifname, "phy", 3)) 425 phyidx = atoi(&ifname[3]); 426 else if (!strncmp(ifname, "radio", 5)) 427 phyidx = nl80211_phy_idx_from_uci(ifname); 428 429 if (!strncmp(ifname, "mon.", 4)) 430 ifidx = if_nametoindex(&ifname[4]); 431 else 432 ifidx = if_nametoindex(ifname); 433 434 /* Valid ifidx must be greater than 0 */ 435 if ((ifidx <= 0) && (phyidx < 0)) 436 return NULL; 437 438 cv = nl80211_new(nls->nl80211, cmd, flags); 439 if (!cv) 440 return NULL; 441 442 if (ifidx > 0) 443 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx); 444 else if (phyidx > -1) 445 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx); 446 447 return cv; 448 449 nla_put_failure: 450 nl80211_free(cv); 451 return NULL; 452 } 453 454 static int nl80211_send(struct nl80211_msg_conveyor *cv, 455 int (*cb_func)(struct nl_msg *, void *), 456 void *cb_arg) 457 { 458 static struct nl80211_msg_conveyor rcv; 459 int err; 460 461 if (cb_func) 462 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg); 463 else 464 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv); 465 466 err = nl_send_auto_complete(nls->nl_sock, cv->msg); 467 468 if (err < 0) 469 goto out; 470 471 err = 1; 472 473 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err); 474 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err); 475 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err); 476 477 while (err > 0) 478 nl_recvmsgs(nls->nl_sock, cv->cb); 479 480 out: 481 nl80211_free(cv); 482 return err; 483 } 484 485 static int nl80211_request(const char *ifname, int cmd, int flags, 486 int (*cb_func)(struct nl_msg *, void *), 487 void *cb_arg) 488 { 489 struct nl80211_msg_conveyor *cv; 490 491 cv = nl80211_msg(ifname, cmd, flags); 492 493 if (!cv) 494 return -ENOMEM; 495 496 return nl80211_send(cv, cb_func, cb_arg); 497 } 498 499 static struct nlattr ** nl80211_parse(struct nl_msg *msg) 500 { 501 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 502 static struct nlattr *attr[NL80211_ATTR_MAX + 1]; 503 504 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), 505 genlmsg_attrlen(gnlh, 0), NULL); 506 507 return attr; 508 } 509 510 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg) 511 { 512 uint32_t *features = arg; 513 struct nlattr **attr = nl80211_parse(msg); 514 515 if (attr[NL80211_ATTR_PROTOCOL_FEATURES]) 516 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]); 517 518 return NL_SKIP; 519 } 520 521 static int nl80211_get_protocol_features(const char *ifname) 522 { 523 struct nl80211_msg_conveyor *req; 524 uint32_t features = 0; 525 526 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0); 527 if (req) { 528 nl80211_send(req, nl80211_get_protocol_features_cb, &features); 529 nl80211_free(req); 530 } 531 532 return features; 533 } 534 535 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg) 536 { 537 struct nl80211_group_conveyor *cv = arg; 538 539 struct nlattr **attr = nl80211_parse(msg); 540 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1]; 541 struct nlattr *mgrp; 542 int mgrpidx; 543 544 if (!attr[CTRL_ATTR_MCAST_GROUPS]) 545 return NL_SKIP; 546 547 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx) 548 { 549 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX, 550 nla_data(mgrp), nla_len(mgrp), NULL); 551 552 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] && 553 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] && 554 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]), 555 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]))) 556 { 557 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]); 558 break; 559 } 560 } 561 562 return NL_SKIP; 563 } 564 565 static int nl80211_subscribe(const char *family, const char *group) 566 { 567 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT }; 568 struct nl80211_msg_conveyor *req; 569 int err; 570 571 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0); 572 if (req) 573 { 574 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family); 575 err = nl80211_send(req, nl80211_subscribe_cb, &cv); 576 577 if (err) 578 return err; 579 580 return nl_socket_add_membership(nls->nl_sock, cv.id); 581 582 nla_put_failure: 583 nl80211_free(req); 584 } 585 586 return -ENOMEM; 587 } 588 589 590 static int nl80211_wait_cb(struct nl_msg *msg, void *arg) 591 { 592 struct nl80211_event_conveyor *cv = arg; 593 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 594 595 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32))) 596 cv->recv = gnlh->cmd; 597 598 return NL_SKIP; 599 } 600 601 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg) 602 { 603 return NL_OK; 604 } 605 606 static int __nl80211_wait(const char *family, const char *group, ...) 607 { 608 struct nl80211_event_conveyor cv = { }; 609 struct nl_cb *cb; 610 int err = 0; 611 int cmd; 612 va_list ap; 613 614 if (nl80211_subscribe(family, group)) 615 return -ENOENT; 616 617 cb = nl_cb_alloc(NL_CB_DEFAULT); 618 619 if (!cb) 620 return -ENOMEM; 621 622 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err); 623 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL); 624 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv ); 625 626 va_start(ap, group); 627 628 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int)) 629 cv.wait[cmd / 32] |= (1 << (cmd % 32)); 630 631 va_end(ap); 632 633 while (!cv.recv && !err) 634 nl_recvmsgs(nls->nl_sock, cb); 635 636 nl_cb_put(cb); 637 638 return err; 639 } 640 641 #define nl80211_wait(family, group, ...) \ 642 __nl80211_wait(family, group, __VA_ARGS__, 0) 643 644 645 static int nl80211_freq2channel(int freq) 646 { 647 if (freq == 2484) 648 return 14; 649 else if (freq < 2484) 650 return (freq - 2407) / 5; 651 else if (freq >= 4910 && freq <= 4980) 652 return (freq - 4000) / 5; 653 else if(freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) 654 return (freq - 56160) / 2160; 655 else 656 return (freq - 5000) / 5; 657 } 658 659 static int nl80211_channel2freq(int channel, const char *band) 660 { 661 if (!band || band[0] != 'a') 662 { 663 if (channel == 14) 664 return 2484; 665 else if (channel < 14) 666 return (channel * 5) + 2407; 667 } 668 else if ( strcmp(band, "ad") == 0) 669 { 670 return 56160 + 2160 * channel; 671 } 672 else 673 { 674 if (channel >= 182 && channel <= 196) 675 return (channel * 5) + 4000; 676 else 677 return (channel * 5) + 5000; 678 } 679 680 return 0; 681 } 682 683 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg) 684 { 685 char *buf = arg; 686 struct nlattr **attr = nl80211_parse(msg); 687 688 if (attr[NL80211_ATTR_WIPHY_NAME]) 689 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]), 690 nla_len(attr[NL80211_ATTR_WIPHY_NAME])); 691 else 692 buf[0] = 0; 693 694 return NL_SKIP; 695 } 696 697 static char * nl80211_ifname2phy(const char *ifname) 698 { 699 static char phy[32] = { 0 }; 700 701 memset(phy, 0, sizeof(phy)); 702 703 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 704 nl80211_ifname2phy_cb, phy); 705 706 return phy[0] ? phy : NULL; 707 } 708 709 static char * nl80211_phy2ifname(const char *ifname) 710 { 711 int ifidx = -1, cifidx = -1, phyidx = -1; 712 char buffer[64]; 713 static char nif[IFNAMSIZ] = { 0 }; 714 715 DIR *d; 716 struct dirent *e; 717 718 /* Only accept phy name of the form phy%d or radio%d */ 719 if (!ifname) 720 return NULL; 721 else if (!strncmp(ifname, "phy", 3)) 722 phyidx = atoi(&ifname[3]); 723 else if (!strncmp(ifname, "radio", 5)) 724 phyidx = nl80211_phy_idx_from_uci(ifname); 725 else 726 return NULL; 727 728 memset(nif, 0, sizeof(nif)); 729 730 if (phyidx > -1) 731 { 732 if ((d = opendir("/sys/class/net")) != NULL) 733 { 734 while ((e = readdir(d)) != NULL) 735 { 736 snprintf(buffer, sizeof(buffer), 737 "/sys/class/net/%s/phy80211/index", e->d_name); 738 739 if (nl80211_readint(buffer) == phyidx) 740 { 741 snprintf(buffer, sizeof(buffer), 742 "/sys/class/net/%s/ifindex", e->d_name); 743 744 if ((cifidx = nl80211_readint(buffer)) >= 0 && 745 ((ifidx < 0) || (cifidx < ifidx))) 746 { 747 ifidx = cifidx; 748 strncpy(nif, e->d_name, sizeof(nif) - 1); 749 } 750 } 751 } 752 753 closedir(d); 754 } 755 } 756 757 return nif[0] ? nif : NULL; 758 } 759 760 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg) 761 { 762 int *mode = arg; 763 struct nlattr **tb = nl80211_parse(msg); 764 const int ifmodes[NL80211_IFTYPE_MAX + 1] = { 765 IWINFO_OPMODE_UNKNOWN, /* unspecified */ 766 IWINFO_OPMODE_ADHOC, /* IBSS */ 767 IWINFO_OPMODE_CLIENT, /* managed */ 768 IWINFO_OPMODE_MASTER, /* AP */ 769 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */ 770 IWINFO_OPMODE_WDS, /* WDS */ 771 IWINFO_OPMODE_MONITOR, /* monitor */ 772 IWINFO_OPMODE_MESHPOINT, /* mesh point */ 773 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */ 774 IWINFO_OPMODE_P2P_GO, /* P2P-GO */ 775 }; 776 777 if (tb[NL80211_ATTR_IFTYPE]) 778 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])]; 779 780 return NL_SKIP; 781 } 782 783 784 static int nl80211_get_mode(const char *ifname, int *buf) 785 { 786 char *res; 787 788 *buf = IWINFO_OPMODE_UNKNOWN; 789 790 res = nl80211_phy2ifname(ifname); 791 792 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 793 nl80211_get_mode_cb, buf); 794 795 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0; 796 } 797 798 static int __nl80211_hostapd_query(const char *ifname, ...) 799 { 800 va_list ap, ap_cur; 801 char *phy, *search, *dest, *key, *val, buf[128]; 802 int len, mode, found = 0, match = 1; 803 FILE *fp; 804 805 if (nl80211_get_mode(ifname, &mode)) 806 return 0; 807 808 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN) 809 return 0; 810 811 phy = nl80211_ifname2phy(ifname); 812 813 if (!phy) 814 return 0; 815 816 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy); 817 fp = fopen(buf, "r"); 818 819 if (!fp) 820 return 0; 821 822 va_start(ap, ifname); 823 824 /* clear all destination buffers */ 825 va_copy(ap_cur, ap); 826 827 while ((search = va_arg(ap_cur, char *)) != NULL) 828 { 829 dest = va_arg(ap_cur, char *); 830 len = va_arg(ap_cur, int); 831 832 memset(dest, 0, len); 833 } 834 835 va_end(ap_cur); 836 837 /* iterate applicable lines and copy found values into dest buffers */ 838 while (fgets(buf, sizeof(buf), fp)) 839 { 840 key = strtok(buf, " =\t\n"); 841 val = strtok(NULL, "\n"); 842 843 if (!key || !val || !*key || *key == '#') 844 continue; 845 846 if (!strcmp(key, "interface") || !strcmp(key, "bss")) 847 match = !strcmp(ifname, val); 848 849 if (!match) 850 continue; 851 852 va_copy(ap_cur, ap); 853 854 while ((search = va_arg(ap_cur, char *)) != NULL) 855 { 856 dest = va_arg(ap_cur, char *); 857 len = va_arg(ap_cur, int); 858 859 if (!strcmp(search, key)) 860 { 861 strncpy(dest, val, len - 1); 862 found++; 863 break; 864 } 865 } 866 867 va_end(ap_cur); 868 } 869 870 fclose(fp); 871 872 va_end(ap); 873 874 return found; 875 } 876 877 #define nl80211_hostapd_query(ifname, ...) \ 878 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL) 879 880 881 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen) 882 { 883 fd_set rfds; 884 struct timeval tv = { 0, 256000 }; 885 886 FD_ZERO(&rfds); 887 FD_SET(sock, &rfds); 888 889 memset(buf, 0, blen); 890 891 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0) 892 return -1; 893 894 if (!FD_ISSET(sock, &rfds)) 895 return -1; 896 897 return recv(sock, buf, blen - 1, 0); 898 } 899 900 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local) 901 { 902 struct sockaddr_un remote = { 0 }; 903 size_t remote_length, local_length; 904 905 int sock = socket(PF_UNIX, SOCK_DGRAM, 0); 906 if (sock < 0) 907 return sock; 908 909 remote.sun_family = AF_UNIX; 910 remote_length = sizeof(remote.sun_family) + 911 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s", 912 ifname, ifname); 913 914 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0) 915 { 916 close(sock); 917 return -1; 918 } 919 920 if (connect(sock, (struct sockaddr *)&remote, remote_length)) 921 { 922 remote_length = sizeof(remote.sun_family) + 923 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname); 924 925 if (connect(sock, (struct sockaddr *)&remote, remote_length)) 926 { 927 close(sock); 928 return -1; 929 } 930 } 931 932 local->sun_family = AF_UNIX; 933 local_length = sizeof(local->sun_family) + 934 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid()); 935 936 if (bind(sock, (struct sockaddr *)local, local_length) < 0) 937 { 938 close(sock); 939 return -1; 940 } 941 942 return sock; 943 } 944 945 static int __nl80211_wpactl_query(const char *ifname, ...) 946 { 947 va_list ap, ap_cur; 948 struct sockaddr_un local = { 0 }; 949 int len, mode, found = 0, sock = -1; 950 char *search, *dest, *key, *val, *line, *pos, buf[512]; 951 952 if (nl80211_get_mode(ifname, &mode)) 953 return 0; 954 955 if (mode != IWINFO_OPMODE_CLIENT && 956 mode != IWINFO_OPMODE_ADHOC && 957 mode != IWINFO_OPMODE_MESHPOINT) 958 return 0; 959 960 sock = nl80211_wpactl_connect(ifname, &local); 961 962 if (sock < 0) 963 return 0; 964 965 va_start(ap, ifname); 966 967 /* clear all destination buffers */ 968 va_copy(ap_cur, ap); 969 970 while ((search = va_arg(ap_cur, char *)) != NULL) 971 { 972 dest = va_arg(ap_cur, char *); 973 len = va_arg(ap_cur, int); 974 975 memset(dest, 0, len); 976 } 977 978 va_end(ap_cur); 979 980 send(sock, "STATUS", 6, 0); 981 982 while (true) 983 { 984 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0) 985 break; 986 987 if (buf[0] == '<') 988 continue; 989 990 for (line = strtok_r(buf, "\n", &pos); 991 line != NULL; 992 line = strtok_r(NULL, "\n", &pos)) 993 { 994 key = strtok(line, "="); 995 val = strtok(NULL, "\n"); 996 997 if (!key || !val) 998 continue; 999 1000 va_copy(ap_cur, ap); 1001 1002 while ((search = va_arg(ap_cur, char *)) != NULL) 1003 { 1004 dest = va_arg(ap_cur, char *); 1005 len = va_arg(ap_cur, int); 1006 1007 if (!strcmp(search, key)) 1008 { 1009 strncpy(dest, val, len - 1); 1010 found++; 1011 break; 1012 } 1013 } 1014 1015 va_end(ap_cur); 1016 } 1017 1018 break; 1019 } 1020 1021 va_end(ap); 1022 1023 close(sock); 1024 unlink(local.sun_path); 1025 1026 return found; 1027 } 1028 1029 #define nl80211_wpactl_query(ifname, ...) \ 1030 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL) 1031 1032 1033 static char * nl80211_ifadd(const char *ifname) 1034 { 1035 char path[PATH_MAX]; 1036 static char nif[IFNAMSIZ] = { 0 }; 1037 struct nl80211_msg_conveyor *req; 1038 FILE *sysfs; 1039 1040 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0); 1041 if (req) 1042 { 1043 snprintf(nif, sizeof(nif), "tmp.%s", ifname); 1044 1045 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif); 1046 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION); 1047 1048 nl80211_send(req, NULL, NULL); 1049 1050 snprintf(path, sizeof(path) - 1, 1051 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif); 1052 1053 if ((sysfs = fopen(path, "w")) != NULL) 1054 { 1055 fwrite("\n", 1, 2, sysfs); 1056 fclose(sysfs); 1057 } 1058 1059 return nif; 1060 1061 nla_put_failure: 1062 nl80211_free(req); 1063 } 1064 1065 return NULL; 1066 } 1067 1068 static void nl80211_ifdel(const char *ifname) 1069 { 1070 struct nl80211_msg_conveyor *req; 1071 int err; 1072 1073 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0); 1074 if (req) 1075 { 1076 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname); 1077 1078 nl80211_send(req, NULL, NULL); 1079 return; 1080 1081 nla_put_failure: 1082 nl80211_free(req); 1083 } 1084 } 1085 1086 static void nl80211_hostapd_hup(const char *ifname) 1087 { 1088 int fd, pid = 0; 1089 char buf[32]; 1090 char *phy = nl80211_ifname2phy(ifname); 1091 1092 if (phy) 1093 { 1094 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy); 1095 if ((fd = open(buf, O_RDONLY)) >= 0) 1096 { 1097 if (read(fd, buf, sizeof(buf)) > 0) 1098 pid = atoi(buf); 1099 1100 close(fd); 1101 } 1102 1103 if (pid > 0) 1104 kill(pid, 1); 1105 } 1106 } 1107 1108 1109 static int nl80211_probe(const char *ifname) 1110 { 1111 return !!nl80211_ifname2phy(ifname); 1112 } 1113 1114 struct nl80211_ssid_bssid { 1115 unsigned char *ssid; 1116 unsigned char bssid[7]; 1117 }; 1118 1119 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg) 1120 { 1121 struct nl80211_ssid_bssid *sb = arg; 1122 struct nlattr **tb = nl80211_parse(msg); 1123 1124 if (tb[NL80211_ATTR_MAC]) { 1125 sb->bssid[0] = 1; 1126 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]), 1127 sizeof(sb->bssid) - 1); 1128 } 1129 1130 return NL_SKIP; 1131 } 1132 1133 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg) 1134 { 1135 int ielen; 1136 unsigned char *ie; 1137 struct nl80211_ssid_bssid *sb = arg; 1138 struct nlattr **tb = nl80211_parse(msg); 1139 struct nlattr *bss[NL80211_BSS_MAX + 1]; 1140 1141 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1142 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 1143 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1144 }; 1145 1146 if (!tb[NL80211_ATTR_BSS] || 1147 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 1148 bss_policy) || 1149 !bss[NL80211_BSS_BSSID] || 1150 !bss[NL80211_BSS_STATUS] || 1151 !bss[NL80211_BSS_INFORMATION_ELEMENTS]) 1152 { 1153 return NL_SKIP; 1154 } 1155 1156 switch (nla_get_u32(bss[NL80211_BSS_STATUS])) 1157 { 1158 case NL80211_BSS_STATUS_ASSOCIATED: 1159 case NL80211_BSS_STATUS_AUTHENTICATED: 1160 case NL80211_BSS_STATUS_IBSS_JOINED: 1161 1162 if (sb->ssid) 1163 { 1164 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1165 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1166 1167 while (ielen >= 2 && ielen >= ie[1]) 1168 { 1169 if (ie[0] == 0) 1170 { 1171 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE)); 1172 return NL_SKIP; 1173 } 1174 1175 ielen -= ie[1] + 2; 1176 ie += ie[1] + 2; 1177 } 1178 } 1179 else 1180 { 1181 sb->bssid[0] = 1; 1182 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6); 1183 return NL_SKIP; 1184 } 1185 1186 default: 1187 return NL_SKIP; 1188 } 1189 } 1190 1191 static int nl80211_get_ssid(const char *ifname, char *buf) 1192 { 1193 char *res; 1194 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf }; 1195 1196 /* try to find ssid from scan dump results */ 1197 res = nl80211_phy2ifname(ifname); 1198 sb.ssid[0] = 0; 1199 1200 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1201 nl80211_get_ssid_bssid_cb, &sb); 1202 1203 /* failed, try to find from hostapd info */ 1204 if (sb.ssid[0] == 0) 1205 nl80211_hostapd_query(ifname, "ssid", sb.ssid, 1206 IWINFO_ESSID_MAX_SIZE + 1); 1207 1208 /* failed, try to obtain Mesh ID */ 1209 if (sb.ssid[0] == 0) 1210 iwinfo_ubus_query(res ? res : ifname, "mesh_id", 1211 sb.ssid, IWINFO_ESSID_MAX_SIZE + 1); 1212 1213 return (sb.ssid[0] == 0) ? -1 : 0; 1214 } 1215 1216 static int nl80211_get_bssid(const char *ifname, char *buf) 1217 { 1218 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")]; 1219 struct nl80211_ssid_bssid sb = { }; 1220 1221 res = nl80211_phy2ifname(ifname); 1222 1223 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */ 1224 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1225 nl80211_get_macaddr_cb, &sb); 1226 1227 /* failed, try to find bssid from scan dump results */ 1228 if (sb.bssid[0] == 0) 1229 nl80211_request(res ? res : ifname, 1230 NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1231 nl80211_get_ssid_bssid_cb, &sb); 1232 1233 /* failed, try to find mac from hostapd info */ 1234 if ((sb.bssid[0] == 0) && 1235 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid))) 1236 { 1237 sb.bssid[0] = 1; 1238 sb.bssid[1] = strtol(&bssid[0], NULL, 16); 1239 sb.bssid[2] = strtol(&bssid[3], NULL, 16); 1240 sb.bssid[3] = strtol(&bssid[6], NULL, 16); 1241 sb.bssid[4] = strtol(&bssid[9], NULL, 16); 1242 sb.bssid[5] = strtol(&bssid[12], NULL, 16); 1243 sb.bssid[6] = strtol(&bssid[15], NULL, 16); 1244 } 1245 1246 if (sb.bssid[0]) 1247 { 1248 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", 1249 sb.bssid[1], sb.bssid[2], sb.bssid[3], 1250 sb.bssid[4], sb.bssid[5], sb.bssid[6]); 1251 1252 return 0; 1253 } 1254 1255 return -1; 1256 } 1257 1258 1259 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg) 1260 { 1261 int *freq = arg; 1262 struct nlattr **attr = nl80211_parse(msg); 1263 struct nlattr *binfo[NL80211_BSS_MAX + 1]; 1264 1265 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1266 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 1267 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1268 }; 1269 1270 if (attr[NL80211_ATTR_BSS] && 1271 !nla_parse_nested(binfo, NL80211_BSS_MAX, 1272 attr[NL80211_ATTR_BSS], bss_policy)) 1273 { 1274 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY]) 1275 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]); 1276 } 1277 1278 return NL_SKIP; 1279 } 1280 1281 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg) 1282 { 1283 int *freq = arg; 1284 struct nlattr **tb = nl80211_parse(msg); 1285 1286 if (tb[NL80211_ATTR_WIPHY_FREQ]) 1287 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]); 1288 1289 return NL_SKIP; 1290 } 1291 1292 static int nl80211_get_frequency(const char *ifname, int *buf) 1293 { 1294 char *res, channel[4], hwmode[3]; 1295 1296 /* try to find frequency from interface info */ 1297 res = nl80211_phy2ifname(ifname); 1298 *buf = 0; 1299 1300 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1301 nl80211_get_frequency_info_cb, buf); 1302 1303 /* failed, try to find frequency from hostapd info */ 1304 if ((*buf == 0) && 1305 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode), 1306 "channel", channel, sizeof(channel)) == 2) 1307 { 1308 *buf = nl80211_channel2freq(atoi(channel), hwmode); 1309 } 1310 1311 /* failed, try to find frequency from scan results */ 1312 if (*buf == 0) 1313 { 1314 res = nl80211_phy2ifname(ifname); 1315 1316 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1317 nl80211_get_frequency_scan_cb, buf); 1318 } 1319 1320 return (*buf == 0) ? -1 : 0; 1321 } 1322 1323 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg) 1324 { 1325 int *freq = arg; 1326 struct nlattr **tb = nl80211_parse(msg); 1327 1328 if (tb[NL80211_ATTR_CENTER_FREQ1]) 1329 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]); 1330 1331 return NL_SKIP; 1332 } 1333 1334 static int nl80211_get_center_freq1(const char *ifname, int *buf) 1335 { 1336 char *res; 1337 1338 /* try to find frequency from interface info */ 1339 res = nl80211_phy2ifname(ifname); 1340 *buf = 0; 1341 1342 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1343 nl80211_get_center_freq1_cb, buf); 1344 1345 return (*buf == 0) ? -1 : 0; 1346 } 1347 1348 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg) 1349 { 1350 int *freq = arg; 1351 struct nlattr **tb = nl80211_parse(msg); 1352 1353 if (tb[NL80211_ATTR_CENTER_FREQ2]) 1354 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]); 1355 1356 return NL_SKIP; 1357 } 1358 1359 static int nl80211_get_center_freq2(const char *ifname, int *buf) 1360 { 1361 char *res; 1362 1363 /* try to find frequency from interface info */ 1364 res = nl80211_phy2ifname(ifname); 1365 *buf = 0; 1366 1367 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1368 nl80211_get_center_freq2_cb, buf); 1369 1370 return (*buf == 0) ? -1 : 0; 1371 } 1372 1373 static int nl80211_get_channel(const char *ifname, int *buf) 1374 { 1375 if (!nl80211_get_frequency(ifname, buf)) 1376 { 1377 *buf = nl80211_freq2channel(*buf); 1378 return 0; 1379 } 1380 1381 return -1; 1382 } 1383 1384 static int nl80211_get_center_chan1(const char *ifname, int *buf) 1385 { 1386 if (!nl80211_get_center_freq1(ifname, buf)) 1387 { 1388 *buf = nl80211_freq2channel(*buf); 1389 return 0; 1390 } 1391 1392 return -1; 1393 } 1394 1395 static int nl80211_get_center_chan2(const char *ifname, int *buf) 1396 { 1397 if (!nl80211_get_center_freq2(ifname, buf)) 1398 { 1399 *buf = nl80211_freq2channel(*buf); 1400 return 0; 1401 } 1402 1403 return -1; 1404 } 1405 1406 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg) 1407 { 1408 int *buf = arg; 1409 struct nlattr **tb = nl80211_parse(msg); 1410 1411 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]) 1412 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])); 1413 1414 return NL_SKIP; 1415 } 1416 1417 static int nl80211_get_txpower(const char *ifname, int *buf) 1418 { 1419 char *res; 1420 1421 res = nl80211_phy2ifname(ifname); 1422 *buf = 0; 1423 1424 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1425 nl80211_get_txpower_cb, buf)) 1426 return -1; 1427 1428 return 0; 1429 } 1430 1431 1432 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg) 1433 { 1434 int8_t dbm; 1435 int16_t mbit; 1436 struct nl80211_rssi_rate *rr = arg; 1437 struct nlattr **attr = nl80211_parse(msg); 1438 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 1439 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 1440 1441 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 1442 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 1443 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 1444 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 1445 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 1446 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 1447 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 1448 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 1449 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 1450 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 1451 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 1452 }; 1453 1454 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 1455 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 1456 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 1457 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 1458 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 1459 }; 1460 1461 if (attr[NL80211_ATTR_STA_INFO]) 1462 { 1463 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 1464 attr[NL80211_ATTR_STA_INFO], stats_policy)) 1465 { 1466 if (sinfo[NL80211_STA_INFO_SIGNAL]) 1467 { 1468 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 1469 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1); 1470 rr->rssi_samples++; 1471 } 1472 1473 if (sinfo[NL80211_STA_INFO_TX_BITRATE]) 1474 { 1475 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 1476 sinfo[NL80211_STA_INFO_TX_BITRATE], 1477 rate_policy)) 1478 { 1479 if (rinfo[NL80211_RATE_INFO_BITRATE]) 1480 { 1481 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]); 1482 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1); 1483 rr->rate_samples++; 1484 } 1485 } 1486 } 1487 } 1488 } 1489 1490 return NL_SKIP; 1491 } 1492 1493 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r) 1494 { 1495 DIR *d; 1496 struct dirent *de; 1497 1498 memset(r, 0, sizeof(*r)); 1499 1500 if ((d = opendir("/sys/class/net")) != NULL) 1501 { 1502 while ((de = readdir(d)) != NULL) 1503 { 1504 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 1505 (!de->d_name[strlen(ifname)] || 1506 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 1507 { 1508 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 1509 NLM_F_DUMP, nl80211_fill_signal_cb, r); 1510 } 1511 } 1512 1513 closedir(d); 1514 } 1515 } 1516 1517 static int nl80211_get_bitrate(const char *ifname, int *buf) 1518 { 1519 struct nl80211_rssi_rate rr; 1520 1521 nl80211_fill_signal(ifname, &rr); 1522 1523 if (rr.rate_samples) 1524 { 1525 *buf = (rr.rate * 100); 1526 return 0; 1527 } 1528 1529 return -1; 1530 } 1531 1532 static int nl80211_get_signal(const char *ifname, int *buf) 1533 { 1534 struct nl80211_rssi_rate rr; 1535 1536 nl80211_fill_signal(ifname, &rr); 1537 1538 if (rr.rssi_samples) 1539 { 1540 *buf = rr.rssi; 1541 return 0; 1542 } 1543 1544 return -1; 1545 } 1546 1547 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg) 1548 { 1549 int8_t *noise = arg; 1550 struct nlattr **tb = nl80211_parse(msg); 1551 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1]; 1552 1553 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = { 1554 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 1555 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 1556 }; 1557 1558 if (!tb[NL80211_ATTR_SURVEY_INFO]) 1559 return NL_SKIP; 1560 1561 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX, 1562 tb[NL80211_ATTR_SURVEY_INFO], sp)) 1563 return NL_SKIP; 1564 1565 if (!si[NL80211_SURVEY_INFO_NOISE]) 1566 return NL_SKIP; 1567 1568 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE]) 1569 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]); 1570 1571 return NL_SKIP; 1572 } 1573 1574 1575 static int nl80211_get_noise(const char *ifname, int *buf) 1576 { 1577 int8_t noise = 0; 1578 1579 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP, 1580 nl80211_get_noise_cb, &noise)) 1581 goto out; 1582 1583 *buf = noise; 1584 return 0; 1585 1586 out: 1587 *buf = 0; 1588 return -1; 1589 } 1590 1591 static int nl80211_get_quality(const char *ifname, int *buf) 1592 { 1593 int signal; 1594 1595 if (!nl80211_get_signal(ifname, &signal)) 1596 { 1597 /* A positive signal level is usually just a quality 1598 * value, pass through as-is */ 1599 if (signal >= 0) 1600 { 1601 *buf = signal; 1602 } 1603 1604 /* The cfg80211 wext compat layer assumes a signal range 1605 * of -110 dBm to -40 dBm, the quality value is derived 1606 * by adding 110 to the signal level */ 1607 else 1608 { 1609 if (signal < -110) 1610 signal = -110; 1611 else if (signal > -40) 1612 signal = -40; 1613 1614 *buf = (signal + 110); 1615 } 1616 1617 return 0; 1618 } 1619 1620 return -1; 1621 } 1622 1623 static int nl80211_get_quality_max(const char *ifname, int *buf) 1624 { 1625 /* The cfg80211 wext compat layer assumes a maximum 1626 * quality of 70 */ 1627 *buf = 70; 1628 1629 return 0; 1630 } 1631 1632 static int nl80211_check_wepkey(const char *key) 1633 { 1634 if (key && *key) 1635 { 1636 switch (strlen(key)) 1637 { 1638 case 5: 1639 case 10: 1640 return IWINFO_CIPHER_WEP40; 1641 1642 case 13: 1643 case 26: 1644 return IWINFO_CIPHER_WEP104; 1645 } 1646 } 1647 1648 return 0; 1649 } 1650 1651 static struct { 1652 const char *match; 1653 int version; 1654 int suite; 1655 } wpa_key_mgmt_strings[] = { 1656 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x }, 1657 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x }, 1658 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x }, 1659 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x }, 1660 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK }, 1661 { "NONE", 0, IWINFO_KMGMT_NONE }, 1662 { "None", 0, IWINFO_KMGMT_NONE }, 1663 { "PSK", 0, IWINFO_KMGMT_PSK }, 1664 { "EAP", 0, IWINFO_KMGMT_8021x }, 1665 { "SAE", 4, IWINFO_KMGMT_SAE }, 1666 { "OWE", 4, IWINFO_KMGMT_OWE } 1667 }; 1668 1669 static void parse_wpa_suites(const char *str, int defversion, 1670 uint8_t *versions, uint8_t *suites) 1671 { 1672 size_t l; 1673 int i, version; 1674 const char *p, *q, *m, *sep = " \t\n,-+/"; 1675 1676 for (p = str; *p; ) 1677 { 1678 q = p; 1679 1680 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++) 1681 { 1682 m = wpa_key_mgmt_strings[i].match; 1683 l = strlen(m); 1684 1685 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1686 { 1687 if (wpa_key_mgmt_strings[i].version != 0) 1688 version = wpa_key_mgmt_strings[i].version; 1689 else 1690 version = defversion; 1691 1692 *versions |= version; 1693 *suites |= wpa_key_mgmt_strings[i].suite; 1694 1695 q += l; 1696 break; 1697 } 1698 } 1699 1700 if (q == p) 1701 q += strcspn(q, sep); 1702 1703 p = q + strspn(q, sep); 1704 } 1705 } 1706 1707 static struct { 1708 const char *match; 1709 int cipher; 1710 } wpa_cipher_strings[] = { 1711 { "WEP-104", IWINFO_CIPHER_WEP104 }, 1712 { "WEP-40", IWINFO_CIPHER_WEP40 }, 1713 { "NONE", IWINFO_CIPHER_NONE }, 1714 { "TKIP", IWINFO_CIPHER_TKIP }, 1715 { "CCMP", IWINFO_CIPHER_CCMP }, 1716 { "GCMP", IWINFO_CIPHER_GCMP } 1717 }; 1718 1719 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers) 1720 { 1721 int i; 1722 size_t l; 1723 const char *m, *p, *q, *sep = " \t\n,-+/"; 1724 1725 for (p = str; *p; ) 1726 { 1727 q = p; 1728 1729 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++) 1730 { 1731 m = wpa_cipher_strings[i].match; 1732 l = strlen(m); 1733 1734 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1735 { 1736 *ciphers |= wpa_cipher_strings[i].cipher; 1737 1738 q += l; 1739 break; 1740 } 1741 } 1742 1743 if (q == p) 1744 q += strcspn(q, sep); 1745 1746 p = q + strspn(q, sep); 1747 } 1748 } 1749 1750 static int nl80211_get_encryption(const char *ifname, char *buf) 1751 { 1752 char *p; 1753 int opmode; 1754 uint8_t wpa_version = 0; 1755 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16]; 1756 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27]; 1757 char mode[16]; 1758 1759 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf; 1760 1761 /* WPA supplicant */ 1762 if (nl80211_wpactl_query(ifname, 1763 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise), 1764 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise), 1765 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1766 "mode", mode, sizeof(mode))) 1767 { 1768 /* WEP or Open */ 1769 if (!strcmp(wpa_key_mgmt, "NONE")) 1770 { 1771 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1772 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1773 1774 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) { 1775 c->enabled = 1; 1776 c->auth_suites = IWINFO_KMGMT_NONE; 1777 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 1778 } 1779 else { 1780 c->pair_ciphers = 0; 1781 c->group_ciphers = 0; 1782 } 1783 } 1784 1785 /* MESH with SAE */ 1786 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN")) 1787 { 1788 c->enabled = 1; 1789 c->wpa_version = 4; 1790 c->auth_suites = IWINFO_KMGMT_SAE; 1791 c->pair_ciphers = IWINFO_CIPHER_CCMP; 1792 c->group_ciphers = IWINFO_CIPHER_CCMP; 1793 } 1794 1795 /* WPA */ 1796 else 1797 { 1798 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1799 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1800 1801 p = wpa_key_mgmt; 1802 1803 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5)) 1804 { 1805 p += 5; 1806 wpa_version = 2; 1807 } 1808 else if (!strncmp(p, "WPA-", 4)) 1809 { 1810 p += 4; 1811 wpa_version = 1; 1812 } 1813 1814 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites); 1815 1816 c->enabled = !!(c->wpa_version && c->auth_suites); 1817 } 1818 1819 return 0; 1820 } 1821 1822 /* Hostapd */ 1823 else if (nl80211_hostapd_query(ifname, 1824 "wpa", wpa, sizeof(wpa), 1825 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1826 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise), 1827 "auth_algs", auth_algs, sizeof(auth_algs), 1828 "wep_key0", wep_key0, sizeof(wep_key0), 1829 "wep_key1", wep_key1, sizeof(wep_key1), 1830 "wep_key2", wep_key2, sizeof(wep_key2), 1831 "wep_key3", wep_key3, sizeof(wep_key3))) 1832 { 1833 c->wpa_version = 0; 1834 1835 if (wpa_key_mgmt[0]) 1836 { 1837 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t")) 1838 { 1839 if (!strncmp(p, "WPA-", 4)) 1840 p += 4; 1841 1842 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites); 1843 } 1844 1845 c->enabled = c->wpa_version ? 1 : 0; 1846 } 1847 1848 if (wpa_pairwise[0]) 1849 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1850 1851 if (auth_algs[0]) 1852 { 1853 switch (atoi(auth_algs)) 1854 { 1855 case 1: 1856 c->auth_algs |= IWINFO_AUTH_OPEN; 1857 break; 1858 1859 case 2: 1860 c->auth_algs |= IWINFO_AUTH_SHARED; 1861 break; 1862 1863 case 3: 1864 c->auth_algs |= IWINFO_AUTH_OPEN; 1865 c->auth_algs |= IWINFO_AUTH_SHARED; 1866 break; 1867 } 1868 1869 c->pair_ciphers |= nl80211_check_wepkey(wep_key0); 1870 c->pair_ciphers |= nl80211_check_wepkey(wep_key1); 1871 c->pair_ciphers |= nl80211_check_wepkey(wep_key2); 1872 c->pair_ciphers |= nl80211_check_wepkey(wep_key3); 1873 1874 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0; 1875 } 1876 1877 c->group_ciphers = c->pair_ciphers; 1878 1879 return 0; 1880 } 1881 1882 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */ 1883 else if (!nl80211_get_mode(ifname, &opmode) && 1884 (opmode == IWINFO_OPMODE_ADHOC || 1885 opmode == IWINFO_OPMODE_MESHPOINT)) 1886 { 1887 c->enabled = 0; 1888 1889 return 0; 1890 } 1891 1892 1893 return -1; 1894 } 1895 1896 static int nl80211_get_phyname(const char *ifname, char *buf) 1897 { 1898 const char *name; 1899 1900 name = nl80211_ifname2phy(ifname); 1901 1902 if (name) 1903 { 1904 strcpy(buf, name); 1905 return 0; 1906 } 1907 else if ((name = nl80211_phy2ifname(ifname)) != NULL) 1908 { 1909 name = nl80211_ifname2phy(name); 1910 1911 if (name) 1912 { 1913 strcpy(buf, ifname); 1914 return 0; 1915 } 1916 } 1917 1918 return -1; 1919 } 1920 1921 1922 static void nl80211_parse_rateinfo(struct nlattr **ri, 1923 struct iwinfo_rate_entry *re) 1924 { 1925 if (ri[NL80211_RATE_INFO_BITRATE32]) 1926 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100; 1927 else if (ri[NL80211_RATE_INFO_BITRATE]) 1928 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100; 1929 1930 if (ri[NL80211_RATE_INFO_HE_MCS]) 1931 { 1932 re->is_he = 1; 1933 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]); 1934 1935 if (ri[NL80211_RATE_INFO_HE_NSS]) 1936 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]); 1937 if (ri[NL80211_RATE_INFO_HE_GI]) 1938 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]); 1939 if (ri[NL80211_RATE_INFO_HE_DCM]) 1940 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]); 1941 } 1942 else if (ri[NL80211_RATE_INFO_VHT_MCS]) 1943 { 1944 re->is_vht = 1; 1945 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]); 1946 1947 if (ri[NL80211_RATE_INFO_VHT_NSS]) 1948 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]); 1949 } 1950 else if (ri[NL80211_RATE_INFO_MCS]) 1951 { 1952 re->is_ht = 1; 1953 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]); 1954 } 1955 1956 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH]) 1957 re->mhz = 5; 1958 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH]) 1959 re->mhz = 10; 1960 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH]) 1961 re->mhz = 40; 1962 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH]) 1963 re->mhz = 80; 1964 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] || 1965 ri[NL80211_RATE_INFO_160_MHZ_WIDTH]) 1966 re->mhz = 160; 1967 else 1968 re->mhz = 20; 1969 1970 if (ri[NL80211_RATE_INFO_SHORT_GI]) 1971 re->is_short_gi = 1; 1972 1973 re->is_40mhz = (re->mhz == 40); 1974 } 1975 1976 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg) 1977 { 1978 struct nl80211_array_buf *arr = arg; 1979 struct iwinfo_survey_entry *e = arr->buf; 1980 struct nlattr **attr = nl80211_parse(msg); 1981 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1]; 1982 int rc; 1983 1984 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = { 1985 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 1986 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 1987 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 }, 1988 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 }, 1989 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 }, 1990 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 }, 1991 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 }, 1992 }; 1993 1994 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX, 1995 attr[NL80211_ATTR_SURVEY_INFO], 1996 survey_policy); 1997 if (rc) 1998 return NL_SKIP; 1999 2000 /* advance to end of array */ 2001 e += arr->count; 2002 memset(e, 0, sizeof(*e)); 2003 2004 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY]) 2005 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]); 2006 2007 if (sinfo[NL80211_SURVEY_INFO_NOISE]) 2008 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]); 2009 2010 if (sinfo[NL80211_SURVEY_INFO_TIME]) 2011 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]); 2012 2013 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY]) 2014 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]); 2015 2016 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]) 2017 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]); 2018 2019 if (sinfo[NL80211_SURVEY_INFO_TIME_RX]) 2020 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]); 2021 2022 if (sinfo[NL80211_SURVEY_INFO_TIME_TX]) 2023 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]); 2024 2025 arr->count++; 2026 return NL_SKIP; 2027 } 2028 2029 2030 static void plink_state_to_str(char *dst, unsigned state) 2031 { 2032 switch (state) { 2033 case NL80211_PLINK_LISTEN: 2034 strcpy(dst, "LISTEN"); 2035 break; 2036 case NL80211_PLINK_OPN_SNT: 2037 strcpy(dst, "OPN_SNT"); 2038 break; 2039 case NL80211_PLINK_OPN_RCVD: 2040 strcpy(dst, "OPN_RCVD"); 2041 break; 2042 case NL80211_PLINK_CNF_RCVD: 2043 strcpy(dst, "CNF_RCVD"); 2044 break; 2045 case NL80211_PLINK_ESTAB: 2046 strcpy(dst, "ESTAB"); 2047 break; 2048 case NL80211_PLINK_HOLDING: 2049 strcpy(dst, "HOLDING"); 2050 break; 2051 case NL80211_PLINK_BLOCKED: 2052 strcpy(dst, "BLOCKED"); 2053 break; 2054 default: 2055 strcpy(dst, "UNKNOWN"); 2056 break; 2057 } 2058 } 2059 2060 static void power_mode_to_str(char *dst, struct nlattr *a) 2061 { 2062 enum nl80211_mesh_power_mode pm = nla_get_u32(a); 2063 2064 switch (pm) { 2065 case NL80211_MESH_POWER_ACTIVE: 2066 strcpy(dst, "ACTIVE"); 2067 break; 2068 case NL80211_MESH_POWER_LIGHT_SLEEP: 2069 strcpy(dst, "LIGHT SLEEP"); 2070 break; 2071 case NL80211_MESH_POWER_DEEP_SLEEP: 2072 strcpy(dst, "DEEP SLEEP"); 2073 break; 2074 default: 2075 strcpy(dst, "UNKNOWN"); 2076 break; 2077 } 2078 } 2079 2080 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg) 2081 { 2082 struct nl80211_array_buf *arr = arg; 2083 struct iwinfo_assoclist_entry *e = arr->buf; 2084 struct nlattr **attr = nl80211_parse(msg); 2085 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 2086 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 2087 struct nl80211_sta_flag_update *sta_flags; 2088 2089 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 2090 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 2091 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 2092 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 2093 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED }, 2094 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 2095 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 2096 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 }, 2097 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 2098 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 2099 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 }, 2100 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 }, 2101 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 }, 2102 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 }, 2103 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 }, 2104 [NL80211_STA_INFO_STA_FLAGS] = 2105 { .minlen = sizeof(struct nl80211_sta_flag_update) }, 2106 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 }, 2107 /* mesh */ 2108 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 2109 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 2110 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 2111 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 }, 2112 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 }, 2113 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 }, 2114 }; 2115 2116 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 2117 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 2118 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 2119 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 2120 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 2121 }; 2122 2123 /* advance to end of array */ 2124 e += arr->count; 2125 memset(e, 0, sizeof(*e)); 2126 2127 if (attr[NL80211_ATTR_MAC]) 2128 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6); 2129 2130 if (attr[NL80211_ATTR_STA_INFO] && 2131 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 2132 attr[NL80211_ATTR_STA_INFO], stats_policy)) 2133 { 2134 if (sinfo[NL80211_STA_INFO_SIGNAL]) 2135 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 2136 2137 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG]) 2138 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]); 2139 2140 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME]) 2141 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]); 2142 2143 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME]) 2144 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]); 2145 2146 if (sinfo[NL80211_STA_INFO_RX_PACKETS]) 2147 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]); 2148 2149 if (sinfo[NL80211_STA_INFO_TX_PACKETS]) 2150 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]); 2151 2152 if (sinfo[NL80211_STA_INFO_RX_BITRATE] && 2153 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2154 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy)) 2155 nl80211_parse_rateinfo(rinfo, &e->rx_rate); 2156 2157 if (sinfo[NL80211_STA_INFO_TX_BITRATE] && 2158 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2159 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy)) 2160 nl80211_parse_rateinfo(rinfo, &e->tx_rate); 2161 2162 if (sinfo[NL80211_STA_INFO_RX_BYTES]) 2163 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]); 2164 2165 if (sinfo[NL80211_STA_INFO_TX_BYTES]) 2166 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]); 2167 2168 if (sinfo[NL80211_STA_INFO_TX_RETRIES]) 2169 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]); 2170 2171 if (sinfo[NL80211_STA_INFO_TX_FAILED]) 2172 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]); 2173 2174 if (sinfo[NL80211_STA_INFO_T_OFFSET]) 2175 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]); 2176 2177 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC]) 2178 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]); 2179 2180 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]) 2181 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]); 2182 2183 /* mesh */ 2184 if (sinfo[NL80211_STA_INFO_LLID]) 2185 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]); 2186 2187 if (sinfo[NL80211_STA_INFO_PLID]) 2188 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]); 2189 2190 if (sinfo[NL80211_STA_INFO_PLINK_STATE]) 2191 plink_state_to_str(e->plink_state, 2192 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE])); 2193 2194 if (sinfo[NL80211_STA_INFO_LOCAL_PM]) 2195 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]); 2196 if (sinfo[NL80211_STA_INFO_PEER_PM]) 2197 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]); 2198 if (sinfo[NL80211_STA_INFO_NONPEER_PM]) 2199 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]); 2200 2201 /* Station flags */ 2202 if (sinfo[NL80211_STA_INFO_STA_FLAGS]) 2203 { 2204 sta_flags = (struct nl80211_sta_flag_update *) 2205 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]); 2206 2207 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) && 2208 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED)) 2209 e->is_authorized = 1; 2210 2211 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) && 2212 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) 2213 e->is_authenticated = 1; 2214 2215 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) && 2216 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) 2217 e->is_preamble_short = 1; 2218 2219 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) && 2220 sta_flags->set & BIT(NL80211_STA_FLAG_WME)) 2221 e->is_wme = 1; 2222 2223 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) && 2224 sta_flags->set & BIT(NL80211_STA_FLAG_MFP)) 2225 e->is_mfp = 1; 2226 2227 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) && 2228 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER)) 2229 e->is_tdls = 1; 2230 } 2231 } 2232 2233 e->noise = 0; /* filled in by caller */ 2234 arr->count++; 2235 2236 return NL_SKIP; 2237 } 2238 2239 static int nl80211_get_survey(const char *ifname, char *buf, int *len) 2240 { 2241 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2242 int rc; 2243 2244 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY, 2245 NLM_F_DUMP, nl80211_get_survey_cb, &arr); 2246 if (!rc) 2247 *len = (arr.count * sizeof(struct iwinfo_survey_entry)); 2248 else 2249 *len = 0; 2250 2251 return 0; 2252 } 2253 2254 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len) 2255 { 2256 DIR *d; 2257 int i, noise = 0; 2258 struct dirent *de; 2259 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2260 struct iwinfo_assoclist_entry *e; 2261 2262 if ((d = opendir("/sys/class/net")) != NULL) 2263 { 2264 while ((de = readdir(d)) != NULL) 2265 { 2266 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 2267 (!de->d_name[strlen(ifname)] || 2268 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 2269 { 2270 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 2271 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr); 2272 } 2273 } 2274 2275 closedir(d); 2276 2277 if (!nl80211_get_noise(ifname, &noise)) 2278 for (i = 0, e = arr.buf; i < arr.count; i++, e++) 2279 e->noise = noise; 2280 2281 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry)); 2282 return 0; 2283 } 2284 2285 return -1; 2286 } 2287 2288 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg) 2289 { 2290 int *dbm_max = arg; 2291 int ch_cur, ch_cmp, bands_remain, freqs_remain; 2292 2293 struct nlattr **attr = nl80211_parse(msg); 2294 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2295 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2296 struct nlattr *band, *freq; 2297 2298 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = { 2299 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 }, 2300 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG }, 2301 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG }, 2302 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG }, 2303 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG }, 2304 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 }, 2305 }; 2306 2307 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */ 2308 *dbm_max = -1; 2309 2310 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2311 { 2312 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), 2313 nla_len(band), NULL); 2314 2315 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 2316 { 2317 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2318 nla_data(freq), nla_len(freq), freq_policy); 2319 2320 ch_cmp = nl80211_freq2channel(nla_get_u32( 2321 freqs[NL80211_FREQUENCY_ATTR_FREQ])); 2322 2323 if ((!ch_cur || (ch_cmp == ch_cur)) && 2324 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) 2325 { 2326 *dbm_max = (int)(0.01 * nla_get_u32( 2327 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])); 2328 2329 break; 2330 } 2331 } 2332 } 2333 2334 return NL_SKIP; 2335 } 2336 2337 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len) 2338 { 2339 int err, ch_cur; 2340 int dbm_max = -1, dbm_cur, dbm_cnt; 2341 struct nl80211_msg_conveyor *req; 2342 struct iwinfo_txpwrlist_entry entry; 2343 2344 if (nl80211_get_channel(ifname, &ch_cur)) 2345 ch_cur = 0; 2346 2347 /* initialize the value pointer with channel for callback */ 2348 dbm_max = ch_cur; 2349 2350 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 2351 nl80211_get_txpwrlist_cb, &dbm_max); 2352 2353 if (!err) 2354 { 2355 for (dbm_cur = 0, dbm_cnt = 0; 2356 dbm_cur < dbm_max; 2357 dbm_cur++, dbm_cnt++) 2358 { 2359 entry.dbm = dbm_cur; 2360 entry.mw = iwinfo_dbm2mw(dbm_cur); 2361 2362 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2363 } 2364 2365 entry.dbm = dbm_max; 2366 entry.mw = iwinfo_dbm2mw(dbm_max); 2367 2368 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2369 dbm_cnt++; 2370 2371 *len = dbm_cnt * sizeof(entry); 2372 return 0; 2373 } 2374 2375 return -1; 2376 } 2377 2378 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c) 2379 { 2380 int wpa_version = 0; 2381 char *p, *q, *proto, *suites; 2382 2383 c->enabled = 0; 2384 2385 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) { 2386 if (!strcmp(p, "WEP")) { 2387 c->enabled = 1; 2388 c->auth_suites = IWINFO_KMGMT_NONE; 2389 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2390 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2391 break; 2392 } 2393 2394 proto = strtok(p, "-"); 2395 suites = strtok(NULL, "]"); 2396 2397 if (!proto || !suites) 2398 continue; 2399 2400 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN")) 2401 wpa_version = 2; 2402 else if (!strcmp(proto, "WPA")) 2403 wpa_version = 1; 2404 else 2405 continue; 2406 2407 c->enabled = 1; 2408 2409 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites); 2410 parse_wpa_ciphers(suites, &c->pair_ciphers); 2411 } 2412 } 2413 2414 2415 struct nl80211_scanlist { 2416 struct iwinfo_scanlist_entry *e; 2417 int len; 2418 }; 2419 2420 2421 static void nl80211_get_scanlist_ie(struct nlattr **bss, 2422 struct iwinfo_scanlist_entry *e) 2423 { 2424 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2425 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2426 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; 2427 int len; 2428 2429 while (ielen >= 2 && ielen >= ie[1]) 2430 { 2431 switch (ie[0]) 2432 { 2433 case 0: /* SSID */ 2434 case 114: /* Mesh ID */ 2435 if (e->ssid[0] == 0) { 2436 len = min(ie[1], IWINFO_ESSID_MAX_SIZE); 2437 memcpy(e->ssid, ie + 2, len); 2438 e->ssid[len] = 0; 2439 } 2440 break; 2441 2442 case 48: /* RSN */ 2443 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1], 2444 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x); 2445 break; 2446 2447 case 221: /* Vendor */ 2448 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1) 2449 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4, 2450 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK); 2451 break; 2452 case 61: /* HT oeration */ 2453 if (ie[1] >= 3) { 2454 e->ht_chan_info.primary_chan = ie[2]; 2455 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3; 2456 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2; 2457 } 2458 break; 2459 case 192: /* VHT operation */ 2460 if (ie[1] >= 3) { 2461 e->vht_chan_info.chan_width = ie[2]; 2462 e->vht_chan_info.center_chan_1 = ie[3]; 2463 e->vht_chan_info.center_chan_2 = ie[4]; 2464 } 2465 break; 2466 } 2467 2468 ielen -= ie[1] + 2; 2469 ie += ie[1] + 2; 2470 } 2471 } 2472 2473 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg) 2474 { 2475 int8_t rssi; 2476 uint16_t caps; 2477 2478 struct nl80211_scanlist *sl = arg; 2479 struct nlattr **tb = nl80211_parse(msg); 2480 struct nlattr *bss[NL80211_BSS_MAX + 1]; 2481 2482 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 2483 [NL80211_BSS_TSF] = { .type = NLA_U64 }, 2484 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 2485 [NL80211_BSS_BSSID] = { 0 }, 2486 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, 2487 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, 2488 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 2489 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, 2490 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, 2491 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 2492 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 }, 2493 [NL80211_BSS_BEACON_IES] = { 0 }, 2494 }; 2495 2496 if (!tb[NL80211_ATTR_BSS] || 2497 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 2498 bss_policy) || 2499 !bss[NL80211_BSS_BSSID]) 2500 { 2501 return NL_SKIP; 2502 } 2503 2504 if (bss[NL80211_BSS_CAPABILITY]) 2505 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); 2506 else 2507 caps = 0; 2508 2509 memset(sl->e, 0, sizeof(*sl->e)); 2510 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6); 2511 2512 if (caps & (1<<1)) 2513 sl->e->mode = IWINFO_OPMODE_ADHOC; 2514 else if (caps & (1<<0)) 2515 sl->e->mode = IWINFO_OPMODE_MASTER; 2516 else 2517 sl->e->mode = IWINFO_OPMODE_MESHPOINT; 2518 2519 if (caps & (1<<4)) 2520 sl->e->crypto.enabled = 1; 2521 2522 if (bss[NL80211_BSS_FREQUENCY]) 2523 sl->e->channel = nl80211_freq2channel(nla_get_u32( 2524 bss[NL80211_BSS_FREQUENCY])); 2525 2526 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) 2527 nl80211_get_scanlist_ie(bss, sl->e); 2528 2529 if (bss[NL80211_BSS_SIGNAL_MBM]) 2530 { 2531 sl->e->signal = 2532 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100); 2533 2534 rssi = sl->e->signal - 0x100; 2535 2536 if (rssi < -110) 2537 rssi = -110; 2538 else if (rssi > -40) 2539 rssi = -40; 2540 2541 sl->e->quality = (rssi + 110); 2542 sl->e->quality_max = 70; 2543 } 2544 2545 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version) 2546 { 2547 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2548 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2549 } 2550 2551 sl->e++; 2552 sl->len++; 2553 2554 return NL_SKIP; 2555 } 2556 2557 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len) 2558 { 2559 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf }; 2560 2561 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL)) 2562 goto out; 2563 2564 if (nl80211_wait("nl80211", "scan", 2565 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED)) 2566 goto out; 2567 2568 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 2569 nl80211_get_scanlist_cb, &sl)) 2570 goto out; 2571 2572 *len = sl.len * sizeof(struct iwinfo_scanlist_entry); 2573 return 0; 2574 2575 out: 2576 *len = 0; 2577 return -1; 2578 } 2579 2580 static int wpasupp_ssid_decode(const char *in, char *out, int outlen) 2581 { 2582 #define hex(x) \ 2583 (((x) >= 'a') ? ((x) - 'a' + 10) : \ 2584 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - ''))) 2585 2586 int len = 0; 2587 2588 while (*in) 2589 { 2590 if (len + 1 >= outlen) 2591 break; 2592 2593 switch (*in) 2594 { 2595 case '\\': 2596 in++; 2597 switch (*in) 2598 { 2599 case 'n': 2600 out[len++] = '\n'; in++; 2601 break; 2602 2603 case 'r': 2604 out[len++] = '\r'; in++; 2605 break; 2606 2607 case 't': 2608 out[len++] = '\t'; in++; 2609 break; 2610 2611 case 'e': 2612 out[len++] = '\033'; in++; 2613 break; 2614 2615 case 'x': 2616 if (isxdigit(*(in+1)) && isxdigit(*(in+2))) 2617 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2)); 2618 in += 3; 2619 break; 2620 2621 default: 2622 out[len++] = *in++; 2623 break; 2624 } 2625 break; 2626 2627 default: 2628 out[len++] = *in++; 2629 break; 2630 } 2631 } 2632 2633 if (outlen > len) 2634 out[len] = '\0'; 2635 2636 return len; 2637 } 2638 2639 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len) 2640 { 2641 int sock, qmax, rssi, tries, count = -1, ready = 0; 2642 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096]; 2643 struct sockaddr_un local = { 0 }; 2644 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf; 2645 2646 sock = nl80211_wpactl_connect(ifname, &local); 2647 2648 if (sock < 0) 2649 return sock; 2650 2651 send(sock, "ATTACH", 6, 0); 2652 send(sock, "SCAN", 4, 0); 2653 2654 /* 2655 * wait for scan results: 2656 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan 2657 * 72 channels at most. We'll also receive two "OK" messages acknowledging 2658 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra 2659 * time to process the results, so try 72 + 2 + 1 times. 2660 */ 2661 for (tries = 0; tries < 75; tries++) 2662 { 2663 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0) 2664 continue; 2665 2666 /* got an event notification */ 2667 if (reply[0] == '<') 2668 { 2669 /* scan results are ready */ 2670 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS")) 2671 { 2672 /* send "SCAN_RESULTS" command */ 2673 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12); 2674 break; 2675 } 2676 2677 /* is another unrelated event, retry */ 2678 tries--; 2679 } 2680 2681 /* scanning already in progress, keep awaiting results */ 2682 else if (!strcmp(reply, "FAIL-BUSY\n")) 2683 { 2684 tries--; 2685 } 2686 2687 /* another failure, abort */ 2688 else if (!strncmp(reply, "FAIL-", 5)) 2689 { 2690 break; 2691 } 2692 } 2693 2694 /* receive and parse scan results if the wait above didn't time out */ 2695 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0) 2696 { 2697 /* received an event notification, receive again */ 2698 if (reply[0] == '<') 2699 continue; 2700 2701 nl80211_get_quality_max(ifname, &qmax); 2702 2703 for (line = strtok_r(reply, "\n", &pos); 2704 line != NULL; 2705 line = strtok_r(NULL, "\n", &pos)) 2706 { 2707 /* skip header line */ 2708 if (count < 0) 2709 { 2710 count++; 2711 continue; 2712 } 2713 2714 bssid = strtok(line, "\t"); 2715 freq = strtok(NULL, "\t"); 2716 signal = strtok(NULL, "\t"); 2717 flags = strtok(NULL, "\t"); 2718 ssid = strtok(NULL, "\n"); 2719 2720 if (!bssid || !freq || !signal || !flags) 2721 continue; 2722 2723 /* BSSID */ 2724 e->mac[0] = strtol(&bssid[0], NULL, 16); 2725 e->mac[1] = strtol(&bssid[3], NULL, 16); 2726 e->mac[2] = strtol(&bssid[6], NULL, 16); 2727 e->mac[3] = strtol(&bssid[9], NULL, 16); 2728 e->mac[4] = strtol(&bssid[12], NULL, 16); 2729 e->mac[5] = strtol(&bssid[15], NULL, 16); 2730 2731 /* SSID */ 2732 if (ssid) 2733 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid)); 2734 else 2735 e->ssid[0] = 0; 2736 2737 /* Mode */ 2738 if (strstr(flags, "[MESH]")) 2739 e->mode = IWINFO_OPMODE_MESHPOINT; 2740 else if (strstr(flags, "[IBSS]")) 2741 e->mode = IWINFO_OPMODE_ADHOC; 2742 else 2743 e->mode = IWINFO_OPMODE_MASTER; 2744 2745 /* Channel */ 2746 e->channel = nl80211_freq2channel(atoi(freq)); 2747 2748 /* Signal */ 2749 rssi = atoi(signal); 2750 e->signal = rssi; 2751 2752 /* Quality */ 2753 if (rssi < 0) 2754 { 2755 /* The cfg80211 wext compat layer assumes a signal range 2756 * of -110 dBm to -40 dBm, the quality value is derived 2757 * by adding 110 to the signal level */ 2758 if (rssi < -110) 2759 rssi = -110; 2760 else if (rssi > -40) 2761 rssi = -40; 2762 2763 e->quality = (rssi + 110); 2764 } 2765 else 2766 { 2767 e->quality = rssi; 2768 } 2769 2770 /* Max. Quality */ 2771 e->quality_max = qmax; 2772 2773 /* Crypto */ 2774 nl80211_get_scancrypto(flags, &e->crypto); 2775 2776 count++; 2777 e++; 2778 } 2779 2780 *len = count * sizeof(struct iwinfo_scanlist_entry); 2781 break; 2782 } 2783 2784 close(sock); 2785 unlink(local.sun_path); 2786 2787 return (count >= 0) ? 0 : -1; 2788 } 2789 2790 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len) 2791 { 2792 char *res; 2793 int rv, mode; 2794 2795 *len = 0; 2796 2797 /* Got a radioX pseudo interface, find some interface on it or create one */ 2798 if (!strncmp(ifname, "radio", 5)) 2799 { 2800 /* Reuse existing interface */ 2801 if ((res = nl80211_phy2ifname(ifname)) != NULL) 2802 { 2803 return nl80211_get_scanlist(res, buf, len); 2804 } 2805 2806 /* Need to spawn a temporary iface for scanning */ 2807 else if ((res = nl80211_ifadd(ifname)) != NULL) 2808 { 2809 rv = nl80211_get_scanlist(res, buf, len); 2810 nl80211_ifdel(res); 2811 return rv; 2812 } 2813 } 2814 2815 /* WPA supplicant */ 2816 if (!nl80211_get_scanlist_wpactl(ifname, buf, len)) 2817 { 2818 return 0; 2819 } 2820 2821 /* station / ad-hoc / monitor scan */ 2822 else if (!nl80211_get_mode(ifname, &mode) && 2823 (mode == IWINFO_OPMODE_ADHOC || 2824 mode == IWINFO_OPMODE_MASTER || 2825 mode == IWINFO_OPMODE_CLIENT || 2826 mode == IWINFO_OPMODE_MONITOR) && 2827 iwinfo_ifup(ifname)) 2828 { 2829 return nl80211_get_scanlist_nl(ifname, buf, len); 2830 } 2831 2832 /* AP scan */ 2833 else 2834 { 2835 /* Got a temp interface, don't create yet another one */ 2836 if (!strncmp(ifname, "tmp.", 4)) 2837 { 2838 if (!iwinfo_ifup(ifname)) 2839 return -1; 2840 2841 rv = nl80211_get_scanlist_nl(ifname, buf, len); 2842 iwinfo_ifdown(ifname); 2843 return rv; 2844 } 2845 2846 /* Spawn a new scan interface */ 2847 else 2848 { 2849 if (!(res = nl80211_ifadd(ifname))) 2850 return -1; 2851 2852 iwinfo_ifmac(res); 2853 2854 /* if we can take the new interface up, the driver supports an 2855 * additional interface and there's no need to tear down the ap */ 2856 if (iwinfo_ifup(res)) 2857 { 2858 rv = nl80211_get_scanlist_nl(res, buf, len); 2859 iwinfo_ifdown(res); 2860 } 2861 2862 /* driver cannot create secondary interface, take down ap 2863 * during scan */ 2864 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res)) 2865 { 2866 rv = nl80211_get_scanlist_nl(res, buf, len); 2867 iwinfo_ifdown(res); 2868 iwinfo_ifup(ifname); 2869 nl80211_hostapd_hup(ifname); 2870 } 2871 2872 nl80211_ifdel(res); 2873 return rv; 2874 } 2875 } 2876 2877 return -1; 2878 } 2879 2880 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg) 2881 { 2882 int bands_remain, freqs_remain; 2883 2884 struct nl80211_array_buf *arr = arg; 2885 struct iwinfo_freqlist_entry *e; 2886 2887 struct nlattr **attr = nl80211_parse(msg); 2888 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2889 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2890 struct nlattr *band, *freq; 2891 2892 e = arr->buf; 2893 e += arr->count; 2894 2895 if (attr[NL80211_ATTR_WIPHY_BANDS]) { 2896 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2897 { 2898 nla_parse(bands, NL80211_BAND_ATTR_MAX, 2899 nla_data(band), nla_len(band), NULL); 2900 2901 if (bands[NL80211_BAND_ATTR_FREQS]) { 2902 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 2903 { 2904 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2905 nla_data(freq), nla_len(freq), NULL); 2906 2907 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] || 2908 freqs[NL80211_FREQUENCY_ATTR_DISABLED]) 2909 continue; 2910 2911 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]); 2912 e->channel = nl80211_freq2channel(e->mhz); 2913 2914 e->restricted = ( 2915 freqs[NL80211_FREQUENCY_ATTR_NO_IR] && 2916 !freqs[NL80211_FREQUENCY_ATTR_RADAR] 2917 ) ? 1 : 0; 2918 2919 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS]) 2920 e->flags |= IWINFO_FREQ_NO_HT40MINUS; 2921 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS]) 2922 e->flags |= IWINFO_FREQ_NO_HT40PLUS; 2923 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ]) 2924 e->flags |= IWINFO_FREQ_NO_80MHZ; 2925 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ]) 2926 e->flags |= IWINFO_FREQ_NO_160MHZ; 2927 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ]) 2928 e->flags |= IWINFO_FREQ_NO_20MHZ; 2929 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ]) 2930 e->flags |= IWINFO_FREQ_NO_10MHZ; 2931 2932 e++; 2933 arr->count++; 2934 } 2935 } 2936 } 2937 } 2938 2939 return NL_SKIP; 2940 } 2941 2942 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len) 2943 { 2944 struct nl80211_msg_conveyor *cv; 2945 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2946 uint32_t features = nl80211_get_protocol_features(ifname); 2947 int flags; 2948 2949 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 2950 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 2951 if (!cv) 2952 goto out; 2953 2954 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 2955 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr)) 2956 goto out; 2957 2958 *len = arr.count * sizeof(struct iwinfo_freqlist_entry); 2959 return 0; 2960 2961 nla_put_failure: 2962 nl80211_free(cv); 2963 out: 2964 *len = 0; 2965 return -1; 2966 } 2967 2968 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg) 2969 { 2970 char *buf = arg; 2971 struct nlattr **attr = nl80211_parse(msg); 2972 2973 if (attr[NL80211_ATTR_REG_ALPHA2]) 2974 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2); 2975 else 2976 buf[0] = 0; 2977 2978 return NL_SKIP; 2979 } 2980 2981 static int nl80211_get_country(const char *ifname, char *buf) 2982 { 2983 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0, 2984 nl80211_get_country_cb, buf)) 2985 return -1; 2986 2987 return 0; 2988 } 2989 2990 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len) 2991 { 2992 int count; 2993 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf; 2994 const struct iwinfo_iso3166_label *l; 2995 2996 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++) 2997 { 2998 e->iso3166 = l->iso3166; 2999 e->ccode[0] = (l->iso3166 / 256); 3000 e->ccode[1] = (l->iso3166 % 256); 3001 e->ccode[2] = 0; 3002 } 3003 3004 *len = (count * sizeof(struct iwinfo_country_entry)); 3005 return 0; 3006 } 3007 3008 3009 struct nl80211_modes 3010 { 3011 bool ok; 3012 uint32_t hw; 3013 uint32_t ht; 3014 3015 uint8_t bands; 3016 3017 uint16_t nl_ht; 3018 uint32_t nl_vht; 3019 uint16_t he_phy_cap[6]; 3020 }; 3021 3022 static int nl80211_eval_modelist(struct nl80211_modes *m) 3023 { 3024 /* Treat any nonzero capability as 11n */ 3025 if (m->nl_ht > 0) 3026 { 3027 m->hw |= IWINFO_80211_N; 3028 m->ht |= IWINFO_HTMODE_HT20; 3029 3030 if (m->nl_ht & (1 << 1)) 3031 m->ht |= IWINFO_HTMODE_HT40; 3032 } 3033 3034 if (m->he_phy_cap[0] != 0) { 3035 m->hw |= IWINFO_80211_AX; 3036 m->ht |= IWINFO_HTMODE_HE20; 3037 3038 if (m->he_phy_cap[0] & BIT(9)) 3039 m->ht |= IWINFO_HTMODE_HE40; 3040 if (m->he_phy_cap[0] & BIT(10)) 3041 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80; 3042 if (m->he_phy_cap[0] & BIT(11)) 3043 m->ht |= IWINFO_HTMODE_HE160; 3044 if (m->he_phy_cap[0] & BIT(12)) 3045 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80; 3046 } 3047 3048 if (m->bands & IWINFO_BAND_24) 3049 { 3050 m->hw |= IWINFO_80211_B; 3051 m->hw |= IWINFO_80211_G; 3052 } 3053 3054 if (m->bands & IWINFO_BAND_5) 3055 { 3056 /* Treat any nonzero capability as 11ac */ 3057 if (m->nl_vht > 0) 3058 { 3059 m->hw |= IWINFO_80211_AC; 3060 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80; 3061 3062 switch ((m->nl_vht >> 2) & 3) 3063 { 3064 case 2: 3065 m->ht |= IWINFO_HTMODE_VHT80_80; 3066 /* fall through */ 3067 3068 case 1: 3069 m->ht |= IWINFO_HTMODE_VHT160; 3070 } 3071 } 3072 else 3073 { 3074 m->hw |= IWINFO_80211_A; 3075 } 3076 } 3077 3078 if (m->bands & IWINFO_BAND_60) 3079 { 3080 m->hw |= IWINFO_80211_AD; 3081 } 3082 3083 } 3084 3085 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg) 3086 { 3087 struct nl80211_modes *m = arg; 3088 int bands_remain, freqs_remain; 3089 uint16_t caps = 0; 3090 uint32_t vht_caps = 0; 3091 struct nlattr **attr = nl80211_parse(msg); 3092 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 3093 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 3094 struct nlattr *band, *freq; 3095 uint32_t freq_mhz; 3096 3097 if (attr[NL80211_ATTR_WIPHY_BANDS]) 3098 { 3099 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 3100 { 3101 nla_parse(bands, NL80211_BAND_ATTR_MAX, 3102 nla_data(band), nla_len(band), NULL); 3103 3104 if (bands[NL80211_BAND_ATTR_HT_CAPA]) 3105 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]); 3106 3107 if (bands[NL80211_BAND_ATTR_VHT_CAPA]) 3108 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]); 3109 3110 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) { 3111 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1]; 3112 struct nlattr *nl_iftype; 3113 int rem_band; 3114 int len; 3115 3116 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) { 3117 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX, 3118 nla_data(nl_iftype), nla_len(nl_iftype), NULL); 3119 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) { 3120 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]); 3121 3122 if (len > sizeof(m->he_phy_cap) - 1) 3123 len = sizeof(m->he_phy_cap) - 1; 3124 memcpy(&((__u8 *)m->he_phy_cap)[1], 3125 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]), 3126 len); 3127 } 3128 } 3129 } 3130 3131 if (bands[NL80211_BAND_ATTR_FREQS]) { 3132 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], 3133 freqs_remain) 3134 { 3135 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 3136 nla_data(freq), nla_len(freq), NULL); 3137 3138 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ]) 3139 continue; 3140 3141 freq_mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]); 3142 3143 if (freq_mhz > 2400 && freq_mhz < 2485) 3144 { 3145 m->bands |= IWINFO_BAND_24; 3146 } 3147 else if (freq_mhz > 5000 && freq_mhz < 5850) 3148 { 3149 m->bands |= IWINFO_BAND_5; 3150 } 3151 else if (freq_mhz > 6000 && freq_mhz < 7120) 3152 { 3153 m->bands |= IWINFO_BAND_6; 3154 } 3155 else if (freq_mhz >= 56160) 3156 { 3157 m->bands |= IWINFO_BAND_60; 3158 } 3159 } 3160 } 3161 } 3162 3163 m->ok = 1; 3164 } 3165 3166 return NL_SKIP; 3167 } 3168 3169 static int nl80211_get_hwmodelist(const char *ifname, int *buf) 3170 { 3171 struct nl80211_msg_conveyor *cv; 3172 struct nl80211_modes m = {}; 3173 uint32_t features = nl80211_get_protocol_features(ifname); 3174 int flags; 3175 3176 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3177 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3178 if (!cv) 3179 goto out; 3180 3181 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3182 if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) 3183 goto nla_put_failure; 3184 3185 nl80211_eval_modelist(&m); 3186 3187 *buf = m.hw; 3188 3189 return 0; 3190 3191 nla_put_failure: 3192 nl80211_free(cv); 3193 out: 3194 return -1; 3195 } 3196 3197 struct chan_info { 3198 int width; 3199 int mode; 3200 }; 3201 3202 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg) 3203 { 3204 struct nlattr **tb = nl80211_parse(msg); 3205 struct nlattr *cur; 3206 struct chan_info *chn = arg; 3207 3208 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH])) 3209 chn->width = nla_get_u32(cur); 3210 3211 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE])) 3212 chn->mode = nla_get_u32(cur); 3213 3214 return NL_SKIP; 3215 } 3216 3217 static int nl80211_get_htmode(const char *ifname, int *buf) 3218 { 3219 struct chan_info chn = { .width = 0, .mode = 0 }; 3220 char *res; 3221 int err; 3222 3223 res = nl80211_phy2ifname(ifname); 3224 *buf = 0; 3225 3226 err = nl80211_request(res ? res : ifname, 3227 NL80211_CMD_GET_INTERFACE, 0, 3228 nl80211_get_htmode_cb, &chn); 3229 if (err) 3230 return -1; 3231 3232 switch (chn.width) { 3233 case NL80211_CHAN_WIDTH_20: 3234 if (chn.mode == -1) 3235 *buf = IWINFO_HTMODE_VHT20; 3236 else 3237 *buf = IWINFO_HTMODE_HT20; 3238 break; 3239 case NL80211_CHAN_WIDTH_40: 3240 if (chn.mode == -1) 3241 *buf = IWINFO_HTMODE_VHT40; 3242 else 3243 *buf = IWINFO_HTMODE_HT40; 3244 break; 3245 case NL80211_CHAN_WIDTH_80: 3246 *buf = IWINFO_HTMODE_VHT80; 3247 break; 3248 case NL80211_CHAN_WIDTH_80P80: 3249 *buf = IWINFO_HTMODE_VHT80_80; 3250 break; 3251 case NL80211_CHAN_WIDTH_160: 3252 *buf = IWINFO_HTMODE_VHT160; 3253 break; 3254 case NL80211_CHAN_WIDTH_5: 3255 case NL80211_CHAN_WIDTH_10: 3256 case NL80211_CHAN_WIDTH_20_NOHT: 3257 *buf = IWINFO_HTMODE_NOHT; 3258 break; 3259 default: 3260 return -1; 3261 } 3262 3263 return 0; 3264 } 3265 3266 static int nl80211_get_htmodelist(const char *ifname, int *buf) 3267 { 3268 struct nl80211_msg_conveyor *cv; 3269 struct nl80211_modes m = {}; 3270 uint32_t features = nl80211_get_protocol_features(ifname); 3271 int flags; 3272 3273 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 3274 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 3275 if (!cv) 3276 goto out; 3277 3278 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 3279 if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) 3280 goto nla_put_failure; 3281 3282 nl80211_eval_modelist(&m); 3283 3284 *buf = m.ht; 3285 3286 return 0; 3287 3288 nla_put_failure: 3289 nl80211_free(cv); 3290 out: 3291 return -1; 3292 } 3293 3294 3295 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg) 3296 { 3297 struct nlattr **attr = nl80211_parse(msg); 3298 struct nlattr *comb; 3299 int *ret = arg; 3300 int comb_rem, limit_rem, mode_rem; 3301 3302 *ret = 0; 3303 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS]) 3304 return NL_SKIP; 3305 3306 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem) 3307 { 3308 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = { 3309 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED }, 3310 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 }, 3311 }; 3312 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1]; 3313 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = { 3314 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED }, 3315 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 }, 3316 }; 3317 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1]; 3318 struct nlattr *limit; 3319 3320 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy); 3321 3322 if (!tb_comb[NL80211_IFACE_COMB_LIMITS]) 3323 continue; 3324 3325 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem) 3326 { 3327 struct nlattr *mode; 3328 3329 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy); 3330 3331 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] || 3332 !tb_limit[NL80211_IFACE_LIMIT_MAX]) 3333 continue; 3334 3335 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2) 3336 continue; 3337 3338 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) { 3339 if (nla_type(mode) == NL80211_IFTYPE_AP) 3340 *ret = 1; 3341 } 3342 } 3343 } 3344 3345 return NL_SKIP; 3346 } 3347 3348 static int nl80211_get_mbssid_support(const char *ifname, int *buf) 3349 { 3350 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 3351 nl80211_get_ifcomb_cb, buf)) 3352 return -1; 3353 3354 return 0; 3355 } 3356 3357 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname) 3358 { 3359 char *phy, compat[64], path[PATH_MAX]; 3360 int i; 3361 3362 /* Try to determine the phy name from the given interface */ 3363 phy = nl80211_ifname2phy(ifname); 3364 3365 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible", 3366 phy ? "ieee80211" : "net", phy ? phy : ifname); 3367 3368 if (nl80211_readstr(path, compat, sizeof(compat)) <= 0) 3369 return -1; 3370 3371 if (!strcmp(compat, "qca,ar9130-wmac")) { 3372 id->vendor_id = 0x168c; 3373 id->device_id = 0x0029; 3374 id->subsystem_vendor_id = 0x168c; 3375 id->subsystem_device_id = 0x9130; 3376 } else if (!strcmp(compat, "qca,ar9330-wmac")) { 3377 id->vendor_id = 0x168c; 3378 id->device_id = 0x0030; 3379 id->subsystem_vendor_id = 0x168c; 3380 id->subsystem_device_id = 0x9330; 3381 } else if (!strcmp(compat, "qca,ar9340-wmac")) { 3382 id->vendor_id = 0x168c; 3383 id->device_id = 0x0030; 3384 id->subsystem_vendor_id = 0x168c; 3385 id->subsystem_device_id = 0x9340; 3386 } else if (!strcmp(compat, "qca,qca9530-wmac")) { 3387 id->vendor_id = 0x168c; 3388 id->device_id = 0x0033; 3389 id->subsystem_vendor_id = 0x168c; 3390 id->subsystem_device_id = 0x9530; 3391 } else if (!strcmp(compat, "qca,qca9550-wmac")) { 3392 id->vendor_id = 0x168c; 3393 id->device_id = 0x0033; 3394 id->subsystem_vendor_id = 0x168c; 3395 id->subsystem_device_id = 0x9550; 3396 } else if (!strcmp(compat, "qca,qca9560-wmac")) { 3397 id->vendor_id = 0x168c; 3398 id->device_id = 0x0033; 3399 id->subsystem_vendor_id = 0x168c; 3400 id->subsystem_device_id = 0x9560; 3401 } else if (!strcmp(compat, "qcom,ipq4019-wifi")) { 3402 id->vendor_id = 0x168c; 3403 id->device_id = 0x003c; 3404 id->subsystem_vendor_id = 0x168c; 3405 id->subsystem_device_id = 0x4019; 3406 } else if (!strcmp(compat, "mediatek,mt7622-wmac")) { 3407 id->vendor_id = 0x14c3; 3408 id->device_id = 0x7622; 3409 id->subsystem_vendor_id = 0x14c3; 3410 id->subsystem_device_id = 0x7622; 3411 } 3412 return (id->vendor_id && id->device_id) ? 0 : -1; 3413 } 3414 3415 3416 static int nl80211_get_hardware_id(const char *ifname, char *buf) 3417 { 3418 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf; 3419 char *phy, num[8], path[PATH_MAX]; 3420 int i; 3421 3422 struct { const char *path; uint16_t *dest; } lookup[] = { 3423 { "vendor", &id->vendor_id }, 3424 { "device", &id->device_id }, 3425 { "subsystem_vendor", &id->subsystem_vendor_id }, 3426 { "subsystem_device", &id->subsystem_device_id } 3427 }; 3428 3429 memset(id, 0, sizeof(*id)); 3430 3431 /* Try to determine the phy name from the given interface */ 3432 phy = nl80211_ifname2phy(ifname); 3433 3434 for (i = 0; i < ARRAY_SIZE(lookup); i++) 3435 { 3436 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s", 3437 phy ? "ieee80211" : "net", 3438 phy ? phy : ifname, lookup[i].path); 3439 3440 if (nl80211_readstr(path, num, sizeof(num)) > 0) 3441 *lookup[i].dest = strtoul(num, NULL, 16); 3442 } 3443 3444 /* Failed to obtain hardware IDs, try FDT */ 3445 if (id->vendor_id == 0 || id->device_id == 0) 3446 if (!nl80211_hardware_id_from_fdt(id, ifname)) 3447 return 0; 3448 3449 /* Failed to obtain hardware IDs, search board config */ 3450 if (id->vendor_id == 0 || id->device_id == 0) 3451 return iwinfo_hardware_id_from_mtd(id); 3452 3453 return 0; 3454 } 3455 3456 static const struct iwinfo_hardware_entry * 3457 nl80211_get_hardware_entry(const char *ifname) 3458 { 3459 struct iwinfo_hardware_id id; 3460 3461 if (nl80211_get_hardware_id(ifname, (char *)&id)) 3462 return NULL; 3463 3464 return iwinfo_hardware(&id); 3465 } 3466 3467 static int nl80211_get_hardware_name(const char *ifname, char *buf) 3468 { 3469 const struct iwinfo_hardware_entry *hw; 3470 3471 if (!(hw = nl80211_get_hardware_entry(ifname))) 3472 sprintf(buf, "Generic MAC80211"); 3473 else 3474 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name); 3475 3476 return 0; 3477 } 3478 3479 static int nl80211_get_txpower_offset(const char *ifname, int *buf) 3480 { 3481 const struct iwinfo_hardware_entry *hw; 3482 3483 if (!(hw = nl80211_get_hardware_entry(ifname))) 3484 return -1; 3485 3486 *buf = hw->txpower_offset; 3487 return 0; 3488 } 3489 3490 static int nl80211_get_frequency_offset(const char *ifname, int *buf) 3491 { 3492 const struct iwinfo_hardware_entry *hw; 3493 3494 if (!(hw = nl80211_get_hardware_entry(ifname))) 3495 return -1; 3496 3497 *buf = hw->frequency_offset; 3498 return 0; 3499 } 3500 3501 static int nl80211_lookup_phyname(const char *section, char *buf) 3502 { 3503 int idx; 3504 3505 if (!strncmp(section, "path=", 5)) 3506 idx = nl80211_phy_idx_from_path(section + 5); 3507 else if (!strncmp(section, "macaddr=", 8)) 3508 idx = nl80211_phy_idx_from_macaddr(section + 8); 3509 else 3510 idx = nl80211_phy_idx_from_uci(section); 3511 3512 if (idx < 0) 3513 return -1; 3514 3515 sprintf(buf, "phy%d", idx); 3516 return 0; 3517 } 3518 3519 static int nl80211_phy_path(const char *phyname, const char **path) 3520 { 3521 if (strncmp(phyname, "phy", 3) != 0) 3522 return -1; 3523 3524 if (strchr(phyname, '/')) 3525 return -1; 3526 3527 *path = nl80211_phy_path_str(phyname); 3528 if (!*path) 3529 return -1; 3530 3531 return 0; 3532 } 3533 3534 const struct iwinfo_ops nl80211_ops = { 3535 .name = "nl80211", 3536 .probe = nl80211_probe, 3537 .channel = nl80211_get_channel, 3538 .center_chan1 = nl80211_get_center_chan1, 3539 .center_chan2 = nl80211_get_center_chan2, 3540 .frequency = nl80211_get_frequency, 3541 .frequency_offset = nl80211_get_frequency_offset, 3542 .txpower = nl80211_get_txpower, 3543 .txpower_offset = nl80211_get_txpower_offset, 3544 .bitrate = nl80211_get_bitrate, 3545 .signal = nl80211_get_signal, 3546 .noise = nl80211_get_noise, 3547 .quality = nl80211_get_quality, 3548 .quality_max = nl80211_get_quality_max, 3549 .mbssid_support = nl80211_get_mbssid_support, 3550 .hwmodelist = nl80211_get_hwmodelist, 3551 .htmodelist = nl80211_get_htmodelist, 3552 .htmode = nl80211_get_htmode, 3553 .mode = nl80211_get_mode, 3554 .ssid = nl80211_get_ssid, 3555 .bssid = nl80211_get_bssid, 3556 .country = nl80211_get_country, 3557 .hardware_id = nl80211_get_hardware_id, 3558 .hardware_name = nl80211_get_hardware_name, 3559 .encryption = nl80211_get_encryption, 3560 .phyname = nl80211_get_phyname, 3561 .assoclist = nl80211_get_assoclist, 3562 .txpwrlist = nl80211_get_txpwrlist, 3563 .scanlist = nl80211_get_scanlist, 3564 .freqlist = nl80211_get_freqlist, 3565 .countrylist = nl80211_get_countrylist, 3566 .survey = nl80211_get_survey, 3567 .lookup_phy = nl80211_lookup_phyname, 3568 .phy_path = nl80211_phy_path, 3569 .close = nl80211_close 3570 }; 3571
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