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 int nl80211_phy_idx_from_uci_path(struct uci_section *s) 237 { 238 size_t linklen, pathlen; 239 char buf[128], *link; 240 struct dirent *e; 241 const char *path; 242 int idx = -1; 243 DIR *d; 244 245 path = uci_lookup_option_string(uci_ctx, s, "path"); 246 if (!path) 247 return -1; 248 249 if ((d = opendir("/sys/class/ieee80211")) != NULL) 250 { 251 while ((e = readdir(d)) != NULL) 252 { 253 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", e->d_name); 254 255 link = realpath(buf, NULL); 256 257 if (link == NULL) 258 continue; 259 260 linklen = strlen(link); 261 pathlen = strlen(path); 262 263 if (pathlen >= linklen || strcmp(link + (linklen - pathlen), path)) 264 linklen = 0; 265 266 free(link); 267 268 if (linklen == 0) 269 continue; 270 271 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name); 272 273 idx = nl80211_readint(buf); 274 275 if (idx >= 0) 276 break; 277 } 278 279 closedir(d); 280 } 281 282 return idx; 283 } 284 285 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s) 286 { 287 const char *opt; 288 char buf[128]; 289 int i, idx = -1; 290 glob_t gl; 291 292 opt = uci_lookup_option_string(uci_ctx, s, "macaddr"); 293 if (!opt) 294 return -1; 295 296 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/ 297 if (glob(buf, 0, NULL, &gl)) 298 return -1; 299 300 for (i = 0; i < gl.gl_pathc; i++) 301 { 302 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]); 303 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0) 304 continue; 305 306 if (fnmatch(opt, buf, FNM_CASEFOLD)) 307 continue; 308 309 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]); 310 if ((idx = nl80211_readint(buf)) > -1) 311 break; 312 } 313 314 globfree(&gl); 315 316 return idx; 317 } 318 319 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s) 320 { 321 const char *opt; 322 char buf[128]; 323 324 opt = uci_lookup_option_string(uci_ctx, s, "phy"); 325 if (!opt) 326 return -1; 327 328 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt); 329 return nl80211_readint(buf); 330 } 331 332 static int nl80211_phy_idx_from_uci(const char *name) 333 { 334 struct uci_section *s; 335 int idx = -1; 336 337 s = iwinfo_uci_get_radio(name, "mac80211"); 338 if (!s) 339 goto free; 340 341 idx = nl80211_phy_idx_from_uci_path(s); 342 343 if (idx < 0) 344 idx = nl80211_phy_idx_from_uci_macaddr(s); 345 346 if (idx < 0) 347 idx = nl80211_phy_idx_from_uci_phy(s); 348 349 free: 350 iwinfo_uci_free(); 351 return idx; 352 } 353 354 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, 355 int cmd, int flags) 356 { 357 int ifidx = -1, phyidx = -1; 358 struct nl80211_msg_conveyor *cv; 359 360 if (ifname == NULL) 361 return NULL; 362 363 if (nl80211_init() < 0) 364 return NULL; 365 366 if (!strncmp(ifname, "phy", 3)) 367 phyidx = atoi(&ifname[3]); 368 else if (!strncmp(ifname, "radio", 5)) 369 phyidx = nl80211_phy_idx_from_uci(ifname); 370 371 if (!strncmp(ifname, "mon.", 4)) 372 ifidx = if_nametoindex(&ifname[4]); 373 else 374 ifidx = if_nametoindex(ifname); 375 376 /* Valid ifidx must be greater than 0 */ 377 if ((ifidx <= 0) && (phyidx < 0)) 378 return NULL; 379 380 cv = nl80211_new(nls->nl80211, cmd, flags); 381 if (!cv) 382 return NULL; 383 384 if (ifidx > 0) 385 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx); 386 else if (phyidx > -1) 387 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx); 388 389 return cv; 390 391 nla_put_failure: 392 nl80211_free(cv); 393 return NULL; 394 } 395 396 static int nl80211_send(struct nl80211_msg_conveyor *cv, 397 int (*cb_func)(struct nl_msg *, void *), 398 void *cb_arg) 399 { 400 static struct nl80211_msg_conveyor rcv; 401 int err; 402 403 if (cb_func) 404 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg); 405 else 406 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv); 407 408 err = nl_send_auto_complete(nls->nl_sock, cv->msg); 409 410 if (err < 0) 411 goto out; 412 413 err = 1; 414 415 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err); 416 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err); 417 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err); 418 419 while (err > 0) 420 nl_recvmsgs(nls->nl_sock, cv->cb); 421 422 out: 423 nl80211_free(cv); 424 return err; 425 } 426 427 static int nl80211_request(const char *ifname, int cmd, int flags, 428 int (*cb_func)(struct nl_msg *, void *), 429 void *cb_arg) 430 { 431 struct nl80211_msg_conveyor *cv; 432 433 cv = nl80211_msg(ifname, cmd, flags); 434 435 if (!cv) 436 return -ENOMEM; 437 438 return nl80211_send(cv, cb_func, cb_arg); 439 } 440 441 static struct nlattr ** nl80211_parse(struct nl_msg *msg) 442 { 443 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 444 static struct nlattr *attr[NL80211_ATTR_MAX + 1]; 445 446 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), 447 genlmsg_attrlen(gnlh, 0), NULL); 448 449 return attr; 450 } 451 452 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg) 453 { 454 uint32_t *features = arg; 455 struct nlattr **attr = nl80211_parse(msg); 456 457 if (attr[NL80211_ATTR_PROTOCOL_FEATURES]) 458 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]); 459 460 return NL_SKIP; 461 } 462 463 static int nl80211_get_protocol_features(const char *ifname) 464 { 465 struct nl80211_msg_conveyor *req; 466 uint32_t features = 0; 467 468 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0); 469 if (req) { 470 nl80211_send(req, nl80211_get_protocol_features_cb, &features); 471 nl80211_free(req); 472 } 473 474 return features; 475 } 476 477 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg) 478 { 479 struct nl80211_group_conveyor *cv = arg; 480 481 struct nlattr **attr = nl80211_parse(msg); 482 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1]; 483 struct nlattr *mgrp; 484 int mgrpidx; 485 486 if (!attr[CTRL_ATTR_MCAST_GROUPS]) 487 return NL_SKIP; 488 489 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx) 490 { 491 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX, 492 nla_data(mgrp), nla_len(mgrp), NULL); 493 494 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] && 495 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] && 496 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]), 497 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]))) 498 { 499 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]); 500 break; 501 } 502 } 503 504 return NL_SKIP; 505 } 506 507 static int nl80211_subscribe(const char *family, const char *group) 508 { 509 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT }; 510 struct nl80211_msg_conveyor *req; 511 int err; 512 513 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0); 514 if (req) 515 { 516 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family); 517 err = nl80211_send(req, nl80211_subscribe_cb, &cv); 518 519 if (err) 520 return err; 521 522 return nl_socket_add_membership(nls->nl_sock, cv.id); 523 524 nla_put_failure: 525 nl80211_free(req); 526 } 527 528 return -ENOMEM; 529 } 530 531 532 static int nl80211_wait_cb(struct nl_msg *msg, void *arg) 533 { 534 struct nl80211_event_conveyor *cv = arg; 535 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); 536 537 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32))) 538 cv->recv = gnlh->cmd; 539 540 return NL_SKIP; 541 } 542 543 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg) 544 { 545 return NL_OK; 546 } 547 548 static int __nl80211_wait(const char *family, const char *group, ...) 549 { 550 struct nl80211_event_conveyor cv = { }; 551 struct nl_cb *cb; 552 int err = 0; 553 int cmd; 554 va_list ap; 555 556 if (nl80211_subscribe(family, group)) 557 return -ENOENT; 558 559 cb = nl_cb_alloc(NL_CB_DEFAULT); 560 561 if (!cb) 562 return -ENOMEM; 563 564 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err); 565 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL); 566 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv ); 567 568 va_start(ap, group); 569 570 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int)) 571 cv.wait[cmd / 32] |= (1 << (cmd % 32)); 572 573 va_end(ap); 574 575 while (!cv.recv && !err) 576 nl_recvmsgs(nls->nl_sock, cb); 577 578 nl_cb_put(cb); 579 580 return err; 581 } 582 583 #define nl80211_wait(family, group, ...) \ 584 __nl80211_wait(family, group, __VA_ARGS__, 0) 585 586 587 static int nl80211_freq2channel(int freq) 588 { 589 if (freq == 2484) 590 return 14; 591 else if (freq < 2484) 592 return (freq - 2407) / 5; 593 else if (freq >= 4910 && freq <= 4980) 594 return (freq - 4000) / 5; 595 else if(freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) 596 return (freq - 56160) / 2160; 597 else 598 return (freq - 5000) / 5; 599 } 600 601 static int nl80211_channel2freq(int channel, const char *band) 602 { 603 if (!band || band[0] != 'a') 604 { 605 if (channel == 14) 606 return 2484; 607 else if (channel < 14) 608 return (channel * 5) + 2407; 609 } 610 else if ( strcmp(band, "ad") == 0) 611 { 612 return 56160 + 2160 * channel; 613 } 614 else 615 { 616 if (channel >= 182 && channel <= 196) 617 return (channel * 5) + 4000; 618 else 619 return (channel * 5) + 5000; 620 } 621 622 return 0; 623 } 624 625 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg) 626 { 627 char *buf = arg; 628 struct nlattr **attr = nl80211_parse(msg); 629 630 if (attr[NL80211_ATTR_WIPHY_NAME]) 631 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]), 632 nla_len(attr[NL80211_ATTR_WIPHY_NAME])); 633 else 634 buf[0] = 0; 635 636 return NL_SKIP; 637 } 638 639 static char * nl80211_ifname2phy(const char *ifname) 640 { 641 static char phy[32] = { 0 }; 642 643 memset(phy, 0, sizeof(phy)); 644 645 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 646 nl80211_ifname2phy_cb, phy); 647 648 return phy[0] ? phy : NULL; 649 } 650 651 static char * nl80211_phy2ifname(const char *ifname) 652 { 653 int ifidx = -1, cifidx = -1, phyidx = -1; 654 char buffer[64]; 655 static char nif[IFNAMSIZ] = { 0 }; 656 657 DIR *d; 658 struct dirent *e; 659 660 /* Only accept phy name of the form phy%d or radio%d */ 661 if (!ifname) 662 return NULL; 663 else if (!strncmp(ifname, "phy", 3)) 664 phyidx = atoi(&ifname[3]); 665 else if (!strncmp(ifname, "radio", 5)) 666 phyidx = nl80211_phy_idx_from_uci(ifname); 667 else 668 return NULL; 669 670 memset(nif, 0, sizeof(nif)); 671 672 if (phyidx > -1) 673 { 674 if ((d = opendir("/sys/class/net")) != NULL) 675 { 676 while ((e = readdir(d)) != NULL) 677 { 678 snprintf(buffer, sizeof(buffer), 679 "/sys/class/net/%s/phy80211/index", e->d_name); 680 681 if (nl80211_readint(buffer) == phyidx) 682 { 683 snprintf(buffer, sizeof(buffer), 684 "/sys/class/net/%s/ifindex", e->d_name); 685 686 if ((cifidx = nl80211_readint(buffer)) >= 0 && 687 ((ifidx < 0) || (cifidx < ifidx))) 688 { 689 ifidx = cifidx; 690 strncpy(nif, e->d_name, sizeof(nif) - 1); 691 } 692 } 693 } 694 695 closedir(d); 696 } 697 } 698 699 return nif[0] ? nif : NULL; 700 } 701 702 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg) 703 { 704 int *mode = arg; 705 struct nlattr **tb = nl80211_parse(msg); 706 const int ifmodes[NL80211_IFTYPE_MAX + 1] = { 707 IWINFO_OPMODE_UNKNOWN, /* unspecified */ 708 IWINFO_OPMODE_ADHOC, /* IBSS */ 709 IWINFO_OPMODE_CLIENT, /* managed */ 710 IWINFO_OPMODE_MASTER, /* AP */ 711 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */ 712 IWINFO_OPMODE_WDS, /* WDS */ 713 IWINFO_OPMODE_MONITOR, /* monitor */ 714 IWINFO_OPMODE_MESHPOINT, /* mesh point */ 715 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */ 716 IWINFO_OPMODE_P2P_GO, /* P2P-GO */ 717 }; 718 719 if (tb[NL80211_ATTR_IFTYPE]) 720 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])]; 721 722 return NL_SKIP; 723 } 724 725 726 static int nl80211_get_mode(const char *ifname, int *buf) 727 { 728 char *res; 729 730 *buf = IWINFO_OPMODE_UNKNOWN; 731 732 res = nl80211_phy2ifname(ifname); 733 734 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 735 nl80211_get_mode_cb, buf); 736 737 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0; 738 } 739 740 static int __nl80211_hostapd_query(const char *ifname, ...) 741 { 742 va_list ap, ap_cur; 743 char *phy, *search, *dest, *key, *val, buf[128]; 744 int len, mode, found = 0, match = 1; 745 FILE *fp; 746 747 if (nl80211_get_mode(ifname, &mode)) 748 return 0; 749 750 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN) 751 return 0; 752 753 phy = nl80211_ifname2phy(ifname); 754 755 if (!phy) 756 return 0; 757 758 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy); 759 fp = fopen(buf, "r"); 760 761 if (!fp) 762 return 0; 763 764 va_start(ap, ifname); 765 766 /* clear all destination buffers */ 767 va_copy(ap_cur, ap); 768 769 while ((search = va_arg(ap_cur, char *)) != NULL) 770 { 771 dest = va_arg(ap_cur, char *); 772 len = va_arg(ap_cur, int); 773 774 memset(dest, 0, len); 775 } 776 777 va_end(ap_cur); 778 779 /* iterate applicable lines and copy found values into dest buffers */ 780 while (fgets(buf, sizeof(buf), fp)) 781 { 782 key = strtok(buf, " =\t\n"); 783 val = strtok(NULL, "\n"); 784 785 if (!key || !val || !*key || *key == '#') 786 continue; 787 788 if (!strcmp(key, "interface") || !strcmp(key, "bss")) 789 match = !strcmp(ifname, val); 790 791 if (!match) 792 continue; 793 794 va_copy(ap_cur, ap); 795 796 while ((search = va_arg(ap_cur, char *)) != NULL) 797 { 798 dest = va_arg(ap_cur, char *); 799 len = va_arg(ap_cur, int); 800 801 if (!strcmp(search, key)) 802 { 803 strncpy(dest, val, len - 1); 804 found++; 805 break; 806 } 807 } 808 809 va_end(ap_cur); 810 } 811 812 fclose(fp); 813 814 va_end(ap); 815 816 return found; 817 } 818 819 #define nl80211_hostapd_query(ifname, ...) \ 820 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL) 821 822 823 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen) 824 { 825 fd_set rfds; 826 struct timeval tv = { 0, 256000 }; 827 828 FD_ZERO(&rfds); 829 FD_SET(sock, &rfds); 830 831 memset(buf, 0, blen); 832 833 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0) 834 return -1; 835 836 if (!FD_ISSET(sock, &rfds)) 837 return -1; 838 839 return recv(sock, buf, blen - 1, 0); 840 } 841 842 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local) 843 { 844 struct sockaddr_un remote = { 0 }; 845 size_t remote_length, local_length; 846 847 int sock = socket(PF_UNIX, SOCK_DGRAM, 0); 848 if (sock < 0) 849 return sock; 850 851 remote.sun_family = AF_UNIX; 852 remote_length = sizeof(remote.sun_family) + 853 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s", 854 ifname, ifname); 855 856 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0) 857 { 858 close(sock); 859 return -1; 860 } 861 862 if (connect(sock, (struct sockaddr *)&remote, remote_length)) 863 { 864 remote_length = sizeof(remote.sun_family) + 865 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname); 866 867 if (connect(sock, (struct sockaddr *)&remote, remote_length)) 868 { 869 close(sock); 870 return -1; 871 } 872 } 873 874 local->sun_family = AF_UNIX; 875 local_length = sizeof(local->sun_family) + 876 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid()); 877 878 if (bind(sock, (struct sockaddr *)local, local_length) < 0) 879 { 880 close(sock); 881 return -1; 882 } 883 884 return sock; 885 } 886 887 static int __nl80211_wpactl_query(const char *ifname, ...) 888 { 889 va_list ap, ap_cur; 890 struct sockaddr_un local = { 0 }; 891 int len, mode, found = 0, sock = -1; 892 char *search, *dest, *key, *val, *line, *pos, buf[512]; 893 894 if (nl80211_get_mode(ifname, &mode)) 895 return 0; 896 897 if (mode != IWINFO_OPMODE_CLIENT && 898 mode != IWINFO_OPMODE_ADHOC && 899 mode != IWINFO_OPMODE_MESHPOINT) 900 return 0; 901 902 sock = nl80211_wpactl_connect(ifname, &local); 903 904 if (sock < 0) 905 return 0; 906 907 va_start(ap, ifname); 908 909 /* clear all destination buffers */ 910 va_copy(ap_cur, ap); 911 912 while ((search = va_arg(ap_cur, char *)) != NULL) 913 { 914 dest = va_arg(ap_cur, char *); 915 len = va_arg(ap_cur, int); 916 917 memset(dest, 0, len); 918 } 919 920 va_end(ap_cur); 921 922 send(sock, "STATUS", 6, 0); 923 924 while (true) 925 { 926 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0) 927 break; 928 929 if (buf[0] == '<') 930 continue; 931 932 for (line = strtok_r(buf, "\n", &pos); 933 line != NULL; 934 line = strtok_r(NULL, "\n", &pos)) 935 { 936 key = strtok(line, "="); 937 val = strtok(NULL, "\n"); 938 939 if (!key || !val) 940 continue; 941 942 va_copy(ap_cur, ap); 943 944 while ((search = va_arg(ap_cur, char *)) != NULL) 945 { 946 dest = va_arg(ap_cur, char *); 947 len = va_arg(ap_cur, int); 948 949 if (!strcmp(search, key)) 950 { 951 strncpy(dest, val, len - 1); 952 found++; 953 break; 954 } 955 } 956 957 va_end(ap_cur); 958 } 959 960 break; 961 } 962 963 va_end(ap); 964 965 close(sock); 966 unlink(local.sun_path); 967 968 return found; 969 } 970 971 #define nl80211_wpactl_query(ifname, ...) \ 972 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL) 973 974 975 static char * nl80211_ifadd(const char *ifname) 976 { 977 char path[PATH_MAX]; 978 static char nif[IFNAMSIZ] = { 0 }; 979 struct nl80211_msg_conveyor *req; 980 FILE *sysfs; 981 982 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0); 983 if (req) 984 { 985 snprintf(nif, sizeof(nif), "tmp.%s", ifname); 986 987 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif); 988 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION); 989 990 nl80211_send(req, NULL, NULL); 991 992 snprintf(path, sizeof(path) - 1, 993 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif); 994 995 if ((sysfs = fopen(path, "w")) != NULL) 996 { 997 fwrite("\n", 1, 2, sysfs); 998 fclose(sysfs); 999 } 1000 1001 return nif; 1002 1003 nla_put_failure: 1004 nl80211_free(req); 1005 } 1006 1007 return NULL; 1008 } 1009 1010 static void nl80211_ifdel(const char *ifname) 1011 { 1012 struct nl80211_msg_conveyor *req; 1013 int err; 1014 1015 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0); 1016 if (req) 1017 { 1018 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname); 1019 1020 nl80211_send(req, NULL, NULL); 1021 return; 1022 1023 nla_put_failure: 1024 nl80211_free(req); 1025 } 1026 } 1027 1028 static void nl80211_hostapd_hup(const char *ifname) 1029 { 1030 int fd, pid = 0; 1031 char buf[32]; 1032 char *phy = nl80211_ifname2phy(ifname); 1033 1034 if (phy) 1035 { 1036 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy); 1037 if ((fd = open(buf, O_RDONLY)) >= 0) 1038 { 1039 if (read(fd, buf, sizeof(buf)) > 0) 1040 pid = atoi(buf); 1041 1042 close(fd); 1043 } 1044 1045 if (pid > 0) 1046 kill(pid, 1); 1047 } 1048 } 1049 1050 1051 static int nl80211_probe(const char *ifname) 1052 { 1053 return !!nl80211_ifname2phy(ifname); 1054 } 1055 1056 struct nl80211_ssid_bssid { 1057 unsigned char *ssid; 1058 unsigned char bssid[7]; 1059 }; 1060 1061 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg) 1062 { 1063 struct nl80211_ssid_bssid *sb = arg; 1064 struct nlattr **tb = nl80211_parse(msg); 1065 1066 if (tb[NL80211_ATTR_MAC]) { 1067 sb->bssid[0] = 1; 1068 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]), 1069 sizeof(sb->bssid) - 1); 1070 } 1071 1072 return NL_SKIP; 1073 } 1074 1075 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg) 1076 { 1077 int ielen; 1078 unsigned char *ie; 1079 struct nl80211_ssid_bssid *sb = arg; 1080 struct nlattr **tb = nl80211_parse(msg); 1081 struct nlattr *bss[NL80211_BSS_MAX + 1]; 1082 1083 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1084 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 1085 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1086 }; 1087 1088 if (!tb[NL80211_ATTR_BSS] || 1089 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 1090 bss_policy) || 1091 !bss[NL80211_BSS_BSSID] || 1092 !bss[NL80211_BSS_STATUS] || 1093 !bss[NL80211_BSS_INFORMATION_ELEMENTS]) 1094 { 1095 return NL_SKIP; 1096 } 1097 1098 switch (nla_get_u32(bss[NL80211_BSS_STATUS])) 1099 { 1100 case NL80211_BSS_STATUS_ASSOCIATED: 1101 case NL80211_BSS_STATUS_AUTHENTICATED: 1102 case NL80211_BSS_STATUS_IBSS_JOINED: 1103 1104 if (sb->ssid) 1105 { 1106 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1107 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 1108 1109 while (ielen >= 2 && ielen >= ie[1]) 1110 { 1111 if (ie[0] == 0) 1112 { 1113 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE)); 1114 return NL_SKIP; 1115 } 1116 1117 ielen -= ie[1] + 2; 1118 ie += ie[1] + 2; 1119 } 1120 } 1121 else 1122 { 1123 sb->bssid[0] = 1; 1124 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6); 1125 return NL_SKIP; 1126 } 1127 1128 default: 1129 return NL_SKIP; 1130 } 1131 } 1132 1133 static int nl80211_get_ssid(const char *ifname, char *buf) 1134 { 1135 char *res; 1136 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf }; 1137 1138 /* try to find ssid from scan dump results */ 1139 res = nl80211_phy2ifname(ifname); 1140 sb.ssid[0] = 0; 1141 1142 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1143 nl80211_get_ssid_bssid_cb, &sb); 1144 1145 /* failed, try to find from hostapd info */ 1146 if (sb.ssid[0] == 0) 1147 nl80211_hostapd_query(ifname, "ssid", sb.ssid, 1148 IWINFO_ESSID_MAX_SIZE + 1); 1149 1150 /* failed, try to obtain Mesh ID */ 1151 if (sb.ssid[0] == 0) 1152 iwinfo_ubus_query(res ? res : ifname, "mesh_id", 1153 sb.ssid, IWINFO_ESSID_MAX_SIZE + 1); 1154 1155 return (sb.ssid[0] == 0) ? -1 : 0; 1156 } 1157 1158 static int nl80211_get_bssid(const char *ifname, char *buf) 1159 { 1160 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")]; 1161 struct nl80211_ssid_bssid sb = { }; 1162 1163 res = nl80211_phy2ifname(ifname); 1164 1165 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */ 1166 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1167 nl80211_get_macaddr_cb, &sb); 1168 1169 /* failed, try to find bssid from scan dump results */ 1170 if (sb.bssid[0] == 0) 1171 nl80211_request(res ? res : ifname, 1172 NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1173 nl80211_get_ssid_bssid_cb, &sb); 1174 1175 /* failed, try to find mac from hostapd info */ 1176 if ((sb.bssid[0] == 0) && 1177 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid))) 1178 { 1179 sb.bssid[0] = 1; 1180 sb.bssid[1] = strtol(&bssid[0], NULL, 16); 1181 sb.bssid[2] = strtol(&bssid[3], NULL, 16); 1182 sb.bssid[3] = strtol(&bssid[6], NULL, 16); 1183 sb.bssid[4] = strtol(&bssid[9], NULL, 16); 1184 sb.bssid[5] = strtol(&bssid[12], NULL, 16); 1185 sb.bssid[6] = strtol(&bssid[15], NULL, 16); 1186 } 1187 1188 if (sb.bssid[0]) 1189 { 1190 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", 1191 sb.bssid[1], sb.bssid[2], sb.bssid[3], 1192 sb.bssid[4], sb.bssid[5], sb.bssid[6]); 1193 1194 return 0; 1195 } 1196 1197 return -1; 1198 } 1199 1200 1201 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg) 1202 { 1203 int *freq = arg; 1204 struct nlattr **attr = nl80211_parse(msg); 1205 struct nlattr *binfo[NL80211_BSS_MAX + 1]; 1206 1207 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 1208 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 1209 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 1210 }; 1211 1212 if (attr[NL80211_ATTR_BSS] && 1213 !nla_parse_nested(binfo, NL80211_BSS_MAX, 1214 attr[NL80211_ATTR_BSS], bss_policy)) 1215 { 1216 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY]) 1217 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]); 1218 } 1219 1220 return NL_SKIP; 1221 } 1222 1223 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg) 1224 { 1225 int *freq = arg; 1226 struct nlattr **tb = nl80211_parse(msg); 1227 1228 if (tb[NL80211_ATTR_WIPHY_FREQ]) 1229 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]); 1230 1231 return NL_SKIP; 1232 } 1233 1234 static int nl80211_get_frequency(const char *ifname, int *buf) 1235 { 1236 char *res, channel[4], hwmode[3]; 1237 1238 /* try to find frequency from interface info */ 1239 res = nl80211_phy2ifname(ifname); 1240 *buf = 0; 1241 1242 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1243 nl80211_get_frequency_info_cb, buf); 1244 1245 /* failed, try to find frequency from hostapd info */ 1246 if ((*buf == 0) && 1247 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode), 1248 "channel", channel, sizeof(channel)) == 2) 1249 { 1250 *buf = nl80211_channel2freq(atoi(channel), hwmode); 1251 } 1252 1253 /* failed, try to find frequency from scan results */ 1254 if (*buf == 0) 1255 { 1256 res = nl80211_phy2ifname(ifname); 1257 1258 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 1259 nl80211_get_frequency_scan_cb, buf); 1260 } 1261 1262 return (*buf == 0) ? -1 : 0; 1263 } 1264 1265 static int nl80211_get_channel(const char *ifname, int *buf) 1266 { 1267 if (!nl80211_get_frequency(ifname, buf)) 1268 { 1269 *buf = nl80211_freq2channel(*buf); 1270 return 0; 1271 } 1272 1273 return -1; 1274 } 1275 1276 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg) 1277 { 1278 int *buf = arg; 1279 struct nlattr **tb = nl80211_parse(msg); 1280 1281 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]) 1282 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])); 1283 1284 return NL_SKIP; 1285 } 1286 1287 static int nl80211_get_txpower(const char *ifname, int *buf) 1288 { 1289 char *res; 1290 1291 res = nl80211_phy2ifname(ifname); 1292 *buf = 0; 1293 1294 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, 1295 nl80211_get_txpower_cb, buf)) 1296 return -1; 1297 1298 return 0; 1299 } 1300 1301 1302 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg) 1303 { 1304 int8_t dbm; 1305 int16_t mbit; 1306 struct nl80211_rssi_rate *rr = arg; 1307 struct nlattr **attr = nl80211_parse(msg); 1308 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 1309 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 1310 1311 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 1312 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 1313 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 1314 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 1315 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 1316 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 1317 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 1318 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 1319 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 1320 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 1321 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 1322 }; 1323 1324 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 1325 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 1326 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 1327 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 1328 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 1329 }; 1330 1331 if (attr[NL80211_ATTR_STA_INFO]) 1332 { 1333 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 1334 attr[NL80211_ATTR_STA_INFO], stats_policy)) 1335 { 1336 if (sinfo[NL80211_STA_INFO_SIGNAL]) 1337 { 1338 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 1339 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1); 1340 rr->rssi_samples++; 1341 } 1342 1343 if (sinfo[NL80211_STA_INFO_TX_BITRATE]) 1344 { 1345 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 1346 sinfo[NL80211_STA_INFO_TX_BITRATE], 1347 rate_policy)) 1348 { 1349 if (rinfo[NL80211_RATE_INFO_BITRATE]) 1350 { 1351 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]); 1352 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1); 1353 rr->rate_samples++; 1354 } 1355 } 1356 } 1357 } 1358 } 1359 1360 return NL_SKIP; 1361 } 1362 1363 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r) 1364 { 1365 DIR *d; 1366 struct dirent *de; 1367 1368 memset(r, 0, sizeof(*r)); 1369 1370 if ((d = opendir("/sys/class/net")) != NULL) 1371 { 1372 while ((de = readdir(d)) != NULL) 1373 { 1374 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 1375 (!de->d_name[strlen(ifname)] || 1376 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 1377 { 1378 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 1379 NLM_F_DUMP, nl80211_fill_signal_cb, r); 1380 } 1381 } 1382 1383 closedir(d); 1384 } 1385 } 1386 1387 static int nl80211_get_bitrate(const char *ifname, int *buf) 1388 { 1389 struct nl80211_rssi_rate rr; 1390 1391 nl80211_fill_signal(ifname, &rr); 1392 1393 if (rr.rate_samples) 1394 { 1395 *buf = (rr.rate * 100); 1396 return 0; 1397 } 1398 1399 return -1; 1400 } 1401 1402 static int nl80211_get_signal(const char *ifname, int *buf) 1403 { 1404 struct nl80211_rssi_rate rr; 1405 1406 nl80211_fill_signal(ifname, &rr); 1407 1408 if (rr.rssi_samples) 1409 { 1410 *buf = rr.rssi; 1411 return 0; 1412 } 1413 1414 return -1; 1415 } 1416 1417 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg) 1418 { 1419 int8_t *noise = arg; 1420 struct nlattr **tb = nl80211_parse(msg); 1421 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1]; 1422 1423 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = { 1424 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 1425 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 1426 }; 1427 1428 if (!tb[NL80211_ATTR_SURVEY_INFO]) 1429 return NL_SKIP; 1430 1431 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX, 1432 tb[NL80211_ATTR_SURVEY_INFO], sp)) 1433 return NL_SKIP; 1434 1435 if (!si[NL80211_SURVEY_INFO_NOISE]) 1436 return NL_SKIP; 1437 1438 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE]) 1439 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]); 1440 1441 return NL_SKIP; 1442 } 1443 1444 1445 static int nl80211_get_noise(const char *ifname, int *buf) 1446 { 1447 int8_t noise = 0; 1448 1449 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP, 1450 nl80211_get_noise_cb, &noise)) 1451 goto out; 1452 1453 *buf = noise; 1454 return 0; 1455 1456 out: 1457 *buf = 0; 1458 return -1; 1459 } 1460 1461 static int nl80211_get_quality(const char *ifname, int *buf) 1462 { 1463 int signal; 1464 1465 if (!nl80211_get_signal(ifname, &signal)) 1466 { 1467 /* A positive signal level is usually just a quality 1468 * value, pass through as-is */ 1469 if (signal >= 0) 1470 { 1471 *buf = signal; 1472 } 1473 1474 /* The cfg80211 wext compat layer assumes a signal range 1475 * of -110 dBm to -40 dBm, the quality value is derived 1476 * by adding 110 to the signal level */ 1477 else 1478 { 1479 if (signal < -110) 1480 signal = -110; 1481 else if (signal > -40) 1482 signal = -40; 1483 1484 *buf = (signal + 110); 1485 } 1486 1487 return 0; 1488 } 1489 1490 return -1; 1491 } 1492 1493 static int nl80211_get_quality_max(const char *ifname, int *buf) 1494 { 1495 /* The cfg80211 wext compat layer assumes a maximum 1496 * quality of 70 */ 1497 *buf = 70; 1498 1499 return 0; 1500 } 1501 1502 static int nl80211_check_wepkey(const char *key) 1503 { 1504 if (key && *key) 1505 { 1506 switch (strlen(key)) 1507 { 1508 case 5: 1509 case 10: 1510 return IWINFO_CIPHER_WEP40; 1511 1512 case 13: 1513 case 26: 1514 return IWINFO_CIPHER_WEP104; 1515 } 1516 } 1517 1518 return 0; 1519 } 1520 1521 static struct { 1522 const char *match; 1523 int version; 1524 int suite; 1525 } wpa_key_mgmt_strings[] = { 1526 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x }, 1527 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x }, 1528 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x }, 1529 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x }, 1530 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK }, 1531 { "NONE", 0, IWINFO_KMGMT_NONE }, 1532 { "None", 0, IWINFO_KMGMT_NONE }, 1533 { "PSK", 0, IWINFO_KMGMT_PSK }, 1534 { "EAP", 0, IWINFO_KMGMT_8021x }, 1535 { "SAE", 4, IWINFO_KMGMT_SAE }, 1536 { "OWE", 4, IWINFO_KMGMT_OWE } 1537 }; 1538 1539 static void parse_wpa_suites(const char *str, int defversion, 1540 uint8_t *versions, uint8_t *suites) 1541 { 1542 size_t l; 1543 int i, version; 1544 const char *p, *q, *m, *sep = " \t\n,-+/"; 1545 1546 for (p = str; *p; ) 1547 { 1548 q = p; 1549 1550 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++) 1551 { 1552 m = wpa_key_mgmt_strings[i].match; 1553 l = strlen(m); 1554 1555 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1556 { 1557 if (wpa_key_mgmt_strings[i].version != 0) 1558 version = wpa_key_mgmt_strings[i].version; 1559 else 1560 version = defversion; 1561 1562 *versions |= version; 1563 *suites |= wpa_key_mgmt_strings[i].suite; 1564 1565 q += l; 1566 break; 1567 } 1568 } 1569 1570 if (q == p) 1571 q += strcspn(q, sep); 1572 1573 p = q + strspn(q, sep); 1574 } 1575 } 1576 1577 static struct { 1578 const char *match; 1579 int cipher; 1580 } wpa_cipher_strings[] = { 1581 { "WEP-104", IWINFO_CIPHER_WEP104 }, 1582 { "WEP-40", IWINFO_CIPHER_WEP40 }, 1583 { "NONE", IWINFO_CIPHER_NONE }, 1584 { "TKIP", IWINFO_CIPHER_TKIP }, 1585 { "CCMP", IWINFO_CIPHER_CCMP } 1586 }; 1587 1588 static void parse_wpa_ciphers(const char *str, uint8_t *ciphers) 1589 { 1590 int i; 1591 size_t l; 1592 const char *m, *p, *q, *sep = " \t\n,-+/"; 1593 1594 for (p = str; *p; ) 1595 { 1596 q = p; 1597 1598 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++) 1599 { 1600 m = wpa_cipher_strings[i].match; 1601 l = strlen(m); 1602 1603 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) 1604 { 1605 *ciphers |= wpa_cipher_strings[i].cipher; 1606 1607 q += l; 1608 break; 1609 } 1610 } 1611 1612 if (q == p) 1613 q += strcspn(q, sep); 1614 1615 p = q + strspn(q, sep); 1616 } 1617 } 1618 1619 static int nl80211_get_encryption(const char *ifname, char *buf) 1620 { 1621 char *p; 1622 int opmode; 1623 uint8_t wpa_version = 0; 1624 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16]; 1625 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27]; 1626 char mode[16]; 1627 1628 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf; 1629 1630 /* WPA supplicant */ 1631 if (nl80211_wpactl_query(ifname, 1632 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise), 1633 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise), 1634 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1635 "mode", mode, sizeof(mode))) 1636 { 1637 /* WEP or Open */ 1638 if (!strcmp(wpa_key_mgmt, "NONE")) 1639 { 1640 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1641 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1642 1643 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) { 1644 c->enabled = 1; 1645 c->auth_suites = IWINFO_KMGMT_NONE; 1646 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 1647 } 1648 else { 1649 c->pair_ciphers = 0; 1650 c->group_ciphers = 0; 1651 } 1652 } 1653 1654 /* MESH with SAE */ 1655 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN")) 1656 { 1657 c->enabled = 1; 1658 c->wpa_version = 4; 1659 c->auth_suites = IWINFO_KMGMT_SAE; 1660 c->pair_ciphers = IWINFO_CIPHER_CCMP; 1661 c->group_ciphers = IWINFO_CIPHER_CCMP; 1662 } 1663 1664 /* WPA */ 1665 else 1666 { 1667 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1668 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); 1669 1670 p = wpa_key_mgmt; 1671 1672 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5)) 1673 { 1674 p += 5; 1675 wpa_version = 2; 1676 } 1677 else if (!strncmp(p, "WPA-", 4)) 1678 { 1679 p += 4; 1680 wpa_version = 1; 1681 } 1682 1683 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites); 1684 1685 c->enabled = !!(c->wpa_version && c->auth_suites); 1686 } 1687 1688 return 0; 1689 } 1690 1691 /* Hostapd */ 1692 else if (nl80211_hostapd_query(ifname, 1693 "wpa", wpa, sizeof(wpa), 1694 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), 1695 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise), 1696 "auth_algs", auth_algs, sizeof(auth_algs), 1697 "wep_key0", wep_key0, sizeof(wep_key0), 1698 "wep_key1", wep_key1, sizeof(wep_key1), 1699 "wep_key2", wep_key2, sizeof(wep_key2), 1700 "wep_key3", wep_key3, sizeof(wep_key3))) 1701 { 1702 c->wpa_version = 0; 1703 1704 if (wpa_key_mgmt[0]) 1705 { 1706 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t")) 1707 { 1708 if (!strncmp(p, "WPA-", 4)) 1709 p += 4; 1710 1711 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites); 1712 } 1713 1714 c->enabled = c->wpa_version ? 1 : 0; 1715 } 1716 1717 if (wpa_pairwise[0]) 1718 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); 1719 1720 if (auth_algs[0]) 1721 { 1722 switch (atoi(auth_algs)) 1723 { 1724 case 1: 1725 c->auth_algs |= IWINFO_AUTH_OPEN; 1726 break; 1727 1728 case 2: 1729 c->auth_algs |= IWINFO_AUTH_SHARED; 1730 break; 1731 1732 case 3: 1733 c->auth_algs |= IWINFO_AUTH_OPEN; 1734 c->auth_algs |= IWINFO_AUTH_SHARED; 1735 break; 1736 } 1737 1738 c->pair_ciphers |= nl80211_check_wepkey(wep_key0); 1739 c->pair_ciphers |= nl80211_check_wepkey(wep_key1); 1740 c->pair_ciphers |= nl80211_check_wepkey(wep_key2); 1741 c->pair_ciphers |= nl80211_check_wepkey(wep_key3); 1742 1743 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0; 1744 } 1745 1746 c->group_ciphers = c->pair_ciphers; 1747 1748 return 0; 1749 } 1750 1751 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */ 1752 else if (!nl80211_get_mode(ifname, &opmode) && 1753 (opmode == IWINFO_OPMODE_ADHOC || 1754 opmode == IWINFO_OPMODE_MESHPOINT)) 1755 { 1756 c->enabled = 0; 1757 1758 return 0; 1759 } 1760 1761 1762 return -1; 1763 } 1764 1765 static int nl80211_get_phyname(const char *ifname, char *buf) 1766 { 1767 const char *name; 1768 1769 name = nl80211_ifname2phy(ifname); 1770 1771 if (name) 1772 { 1773 strcpy(buf, name); 1774 return 0; 1775 } 1776 else if ((name = nl80211_phy2ifname(ifname)) != NULL) 1777 { 1778 name = nl80211_ifname2phy(name); 1779 1780 if (name) 1781 { 1782 strcpy(buf, ifname); 1783 return 0; 1784 } 1785 } 1786 1787 return -1; 1788 } 1789 1790 1791 static void nl80211_parse_rateinfo(struct nlattr **ri, 1792 struct iwinfo_rate_entry *re) 1793 { 1794 if (ri[NL80211_RATE_INFO_BITRATE32]) 1795 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100; 1796 else if (ri[NL80211_RATE_INFO_BITRATE]) 1797 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100; 1798 1799 if (ri[NL80211_RATE_INFO_VHT_MCS]) 1800 { 1801 re->is_vht = 1; 1802 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]); 1803 1804 if (ri[NL80211_RATE_INFO_VHT_NSS]) 1805 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]); 1806 } 1807 else if (ri[NL80211_RATE_INFO_MCS]) 1808 { 1809 re->is_ht = 1; 1810 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]); 1811 } 1812 1813 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH]) 1814 re->mhz = 5; 1815 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH]) 1816 re->mhz = 10; 1817 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH]) 1818 re->mhz = 40; 1819 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH]) 1820 re->mhz = 80; 1821 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] || 1822 ri[NL80211_RATE_INFO_160_MHZ_WIDTH]) 1823 re->mhz = 160; 1824 else 1825 re->mhz = 20; 1826 1827 if (ri[NL80211_RATE_INFO_SHORT_GI]) 1828 re->is_short_gi = 1; 1829 1830 re->is_40mhz = (re->mhz == 40); 1831 } 1832 1833 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg) 1834 { 1835 struct nl80211_array_buf *arr = arg; 1836 struct iwinfo_survey_entry *e = arr->buf; 1837 struct nlattr **attr = nl80211_parse(msg); 1838 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1]; 1839 int rc; 1840 1841 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = { 1842 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, 1843 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, 1844 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 }, 1845 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 }, 1846 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 }, 1847 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 }, 1848 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 }, 1849 }; 1850 1851 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX, 1852 attr[NL80211_ATTR_SURVEY_INFO], 1853 survey_policy); 1854 if (rc) 1855 return NL_SKIP; 1856 1857 /* advance to end of array */ 1858 e += arr->count; 1859 memset(e, 0, sizeof(*e)); 1860 1861 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY]) 1862 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]); 1863 1864 if (sinfo[NL80211_SURVEY_INFO_NOISE]) 1865 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]); 1866 1867 if (sinfo[NL80211_SURVEY_INFO_TIME]) 1868 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]); 1869 1870 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY]) 1871 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]); 1872 1873 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]) 1874 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]); 1875 1876 if (sinfo[NL80211_SURVEY_INFO_TIME_RX]) 1877 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]); 1878 1879 if (sinfo[NL80211_SURVEY_INFO_TIME_TX]) 1880 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]); 1881 1882 arr->count++; 1883 return NL_SKIP; 1884 } 1885 1886 1887 static void plink_state_to_str(char *dst, unsigned state) 1888 { 1889 switch (state) { 1890 case NL80211_PLINK_LISTEN: 1891 strcpy(dst, "LISTEN"); 1892 break; 1893 case NL80211_PLINK_OPN_SNT: 1894 strcpy(dst, "OPN_SNT"); 1895 break; 1896 case NL80211_PLINK_OPN_RCVD: 1897 strcpy(dst, "OPN_RCVD"); 1898 break; 1899 case NL80211_PLINK_CNF_RCVD: 1900 strcpy(dst, "CNF_RCVD"); 1901 break; 1902 case NL80211_PLINK_ESTAB: 1903 strcpy(dst, "ESTAB"); 1904 break; 1905 case NL80211_PLINK_HOLDING: 1906 strcpy(dst, "HOLDING"); 1907 break; 1908 case NL80211_PLINK_BLOCKED: 1909 strcpy(dst, "BLOCKED"); 1910 break; 1911 default: 1912 strcpy(dst, "UNKNOWN"); 1913 break; 1914 } 1915 } 1916 1917 static void power_mode_to_str(char *dst, struct nlattr *a) 1918 { 1919 enum nl80211_mesh_power_mode pm = nla_get_u32(a); 1920 1921 switch (pm) { 1922 case NL80211_MESH_POWER_ACTIVE: 1923 strcpy(dst, "ACTIVE"); 1924 break; 1925 case NL80211_MESH_POWER_LIGHT_SLEEP: 1926 strcpy(dst, "LIGHT SLEEP"); 1927 break; 1928 case NL80211_MESH_POWER_DEEP_SLEEP: 1929 strcpy(dst, "DEEP SLEEP"); 1930 break; 1931 default: 1932 strcpy(dst, "UNKNOWN"); 1933 break; 1934 } 1935 } 1936 1937 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg) 1938 { 1939 struct nl80211_array_buf *arr = arg; 1940 struct iwinfo_assoclist_entry *e = arr->buf; 1941 struct nlattr **attr = nl80211_parse(msg); 1942 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; 1943 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; 1944 struct nl80211_sta_flag_update *sta_flags; 1945 1946 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { 1947 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, 1948 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, 1949 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, 1950 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED }, 1951 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, 1952 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, 1953 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 }, 1954 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, 1955 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, 1956 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 }, 1957 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 }, 1958 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 }, 1959 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 }, 1960 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 }, 1961 [NL80211_STA_INFO_STA_FLAGS] = 1962 { .minlen = sizeof(struct nl80211_sta_flag_update) }, 1963 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 }, 1964 /* mesh */ 1965 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, 1966 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, 1967 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, 1968 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 }, 1969 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 }, 1970 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 }, 1971 }; 1972 1973 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { 1974 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, 1975 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, 1976 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, 1977 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, 1978 }; 1979 1980 /* advance to end of array */ 1981 e += arr->count; 1982 memset(e, 0, sizeof(*e)); 1983 1984 if (attr[NL80211_ATTR_MAC]) 1985 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6); 1986 1987 if (attr[NL80211_ATTR_STA_INFO] && 1988 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, 1989 attr[NL80211_ATTR_STA_INFO], stats_policy)) 1990 { 1991 if (sinfo[NL80211_STA_INFO_SIGNAL]) 1992 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); 1993 1994 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG]) 1995 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]); 1996 1997 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME]) 1998 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]); 1999 2000 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME]) 2001 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]); 2002 2003 if (sinfo[NL80211_STA_INFO_RX_PACKETS]) 2004 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]); 2005 2006 if (sinfo[NL80211_STA_INFO_TX_PACKETS]) 2007 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]); 2008 2009 if (sinfo[NL80211_STA_INFO_RX_BITRATE] && 2010 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2011 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy)) 2012 nl80211_parse_rateinfo(rinfo, &e->rx_rate); 2013 2014 if (sinfo[NL80211_STA_INFO_TX_BITRATE] && 2015 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, 2016 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy)) 2017 nl80211_parse_rateinfo(rinfo, &e->tx_rate); 2018 2019 if (sinfo[NL80211_STA_INFO_RX_BYTES]) 2020 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]); 2021 2022 if (sinfo[NL80211_STA_INFO_TX_BYTES]) 2023 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]); 2024 2025 if (sinfo[NL80211_STA_INFO_TX_RETRIES]) 2026 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]); 2027 2028 if (sinfo[NL80211_STA_INFO_TX_FAILED]) 2029 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]); 2030 2031 if (sinfo[NL80211_STA_INFO_T_OFFSET]) 2032 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]); 2033 2034 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC]) 2035 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]); 2036 2037 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]) 2038 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]); 2039 2040 /* mesh */ 2041 if (sinfo[NL80211_STA_INFO_LLID]) 2042 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]); 2043 2044 if (sinfo[NL80211_STA_INFO_PLID]) 2045 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]); 2046 2047 if (sinfo[NL80211_STA_INFO_PLINK_STATE]) 2048 plink_state_to_str(e->plink_state, 2049 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE])); 2050 2051 if (sinfo[NL80211_STA_INFO_LOCAL_PM]) 2052 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]); 2053 if (sinfo[NL80211_STA_INFO_PEER_PM]) 2054 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]); 2055 if (sinfo[NL80211_STA_INFO_NONPEER_PM]) 2056 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]); 2057 2058 /* Station flags */ 2059 if (sinfo[NL80211_STA_INFO_STA_FLAGS]) 2060 { 2061 sta_flags = (struct nl80211_sta_flag_update *) 2062 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]); 2063 2064 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) && 2065 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED)) 2066 e->is_authorized = 1; 2067 2068 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) && 2069 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) 2070 e->is_authenticated = 1; 2071 2072 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) && 2073 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) 2074 e->is_preamble_short = 1; 2075 2076 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) && 2077 sta_flags->set & BIT(NL80211_STA_FLAG_WME)) 2078 e->is_wme = 1; 2079 2080 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) && 2081 sta_flags->set & BIT(NL80211_STA_FLAG_MFP)) 2082 e->is_mfp = 1; 2083 2084 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) && 2085 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER)) 2086 e->is_tdls = 1; 2087 } 2088 } 2089 2090 e->noise = 0; /* filled in by caller */ 2091 arr->count++; 2092 2093 return NL_SKIP; 2094 } 2095 2096 static int nl80211_get_survey(const char *ifname, char *buf, int *len) 2097 { 2098 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2099 int rc; 2100 2101 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY, 2102 NLM_F_DUMP, nl80211_get_survey_cb, &arr); 2103 if (!rc) 2104 *len = (arr.count * sizeof(struct iwinfo_survey_entry)); 2105 else 2106 *len = 0; 2107 2108 return 0; 2109 } 2110 2111 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len) 2112 { 2113 DIR *d; 2114 int i, noise = 0; 2115 struct dirent *de; 2116 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2117 struct iwinfo_assoclist_entry *e; 2118 2119 if ((d = opendir("/sys/class/net")) != NULL) 2120 { 2121 while ((de = readdir(d)) != NULL) 2122 { 2123 if (!strncmp(de->d_name, ifname, strlen(ifname)) && 2124 (!de->d_name[strlen(ifname)] || 2125 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) 2126 { 2127 nl80211_request(de->d_name, NL80211_CMD_GET_STATION, 2128 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr); 2129 } 2130 } 2131 2132 closedir(d); 2133 2134 if (!nl80211_get_noise(ifname, &noise)) 2135 for (i = 0, e = arr.buf; i < arr.count; i++, e++) 2136 e->noise = noise; 2137 2138 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry)); 2139 return 0; 2140 } 2141 2142 return -1; 2143 } 2144 2145 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg) 2146 { 2147 int *dbm_max = arg; 2148 int ch_cur, ch_cmp, bands_remain, freqs_remain; 2149 2150 struct nlattr **attr = nl80211_parse(msg); 2151 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2152 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2153 struct nlattr *band, *freq; 2154 2155 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = { 2156 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 }, 2157 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG }, 2158 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG }, 2159 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG }, 2160 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG }, 2161 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 }, 2162 }; 2163 2164 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */ 2165 *dbm_max = -1; 2166 2167 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2168 { 2169 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), 2170 nla_len(band), NULL); 2171 2172 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 2173 { 2174 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2175 nla_data(freq), nla_len(freq), freq_policy); 2176 2177 ch_cmp = nl80211_freq2channel(nla_get_u32( 2178 freqs[NL80211_FREQUENCY_ATTR_FREQ])); 2179 2180 if ((!ch_cur || (ch_cmp == ch_cur)) && 2181 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) 2182 { 2183 *dbm_max = (int)(0.01 * nla_get_u32( 2184 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])); 2185 2186 break; 2187 } 2188 } 2189 } 2190 2191 return NL_SKIP; 2192 } 2193 2194 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len) 2195 { 2196 int err, ch_cur; 2197 int dbm_max = -1, dbm_cur, dbm_cnt; 2198 struct nl80211_msg_conveyor *req; 2199 struct iwinfo_txpwrlist_entry entry; 2200 2201 if (nl80211_get_channel(ifname, &ch_cur)) 2202 ch_cur = 0; 2203 2204 /* initialize the value pointer with channel for callback */ 2205 dbm_max = ch_cur; 2206 2207 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 2208 nl80211_get_txpwrlist_cb, &dbm_max); 2209 2210 if (!err) 2211 { 2212 for (dbm_cur = 0, dbm_cnt = 0; 2213 dbm_cur < dbm_max; 2214 dbm_cur++, dbm_cnt++) 2215 { 2216 entry.dbm = dbm_cur; 2217 entry.mw = iwinfo_dbm2mw(dbm_cur); 2218 2219 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2220 } 2221 2222 entry.dbm = dbm_max; 2223 entry.mw = iwinfo_dbm2mw(dbm_max); 2224 2225 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); 2226 dbm_cnt++; 2227 2228 *len = dbm_cnt * sizeof(entry); 2229 return 0; 2230 } 2231 2232 return -1; 2233 } 2234 2235 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c) 2236 { 2237 int wpa_version = 0; 2238 char *p, *q, *proto, *suites; 2239 2240 c->enabled = 0; 2241 2242 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) { 2243 if (!strcmp(p, "WEP")) { 2244 c->enabled = 1; 2245 c->auth_suites = IWINFO_KMGMT_NONE; 2246 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2247 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2248 break; 2249 } 2250 2251 proto = strtok(p, "-"); 2252 suites = strtok(NULL, "]"); 2253 2254 if (!proto || !suites) 2255 continue; 2256 2257 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN")) 2258 wpa_version = 2; 2259 else if (!strcmp(proto, "WPA")) 2260 wpa_version = 1; 2261 else 2262 continue; 2263 2264 c->enabled = 1; 2265 2266 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites); 2267 parse_wpa_ciphers(suites, &c->pair_ciphers); 2268 } 2269 } 2270 2271 2272 struct nl80211_scanlist { 2273 struct iwinfo_scanlist_entry *e; 2274 int len; 2275 }; 2276 2277 2278 static void nl80211_get_scanlist_ie(struct nlattr **bss, 2279 struct iwinfo_scanlist_entry *e) 2280 { 2281 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2282 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); 2283 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; 2284 int len; 2285 2286 while (ielen >= 2 && ielen >= ie[1]) 2287 { 2288 switch (ie[0]) 2289 { 2290 case 0: /* SSID */ 2291 case 114: /* Mesh ID */ 2292 if (e->ssid[0] == 0) { 2293 len = min(ie[1], IWINFO_ESSID_MAX_SIZE); 2294 memcpy(e->ssid, ie + 2, len); 2295 e->ssid[len] = 0; 2296 } 2297 break; 2298 2299 case 48: /* RSN */ 2300 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1], 2301 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x); 2302 break; 2303 2304 case 221: /* Vendor */ 2305 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1) 2306 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4, 2307 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK); 2308 break; 2309 } 2310 2311 ielen -= ie[1] + 2; 2312 ie += ie[1] + 2; 2313 } 2314 } 2315 2316 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg) 2317 { 2318 int8_t rssi; 2319 uint16_t caps; 2320 2321 struct nl80211_scanlist *sl = arg; 2322 struct nlattr **tb = nl80211_parse(msg); 2323 struct nlattr *bss[NL80211_BSS_MAX + 1]; 2324 2325 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { 2326 [NL80211_BSS_TSF] = { .type = NLA_U64 }, 2327 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, 2328 [NL80211_BSS_BSSID] = { 0 }, 2329 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, 2330 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, 2331 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, 2332 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, 2333 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, 2334 [NL80211_BSS_STATUS] = { .type = NLA_U32 }, 2335 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 }, 2336 [NL80211_BSS_BEACON_IES] = { 0 }, 2337 }; 2338 2339 if (!tb[NL80211_ATTR_BSS] || 2340 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], 2341 bss_policy) || 2342 !bss[NL80211_BSS_BSSID]) 2343 { 2344 return NL_SKIP; 2345 } 2346 2347 if (bss[NL80211_BSS_CAPABILITY]) 2348 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); 2349 else 2350 caps = 0; 2351 2352 memset(sl->e, 0, sizeof(*sl->e)); 2353 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6); 2354 2355 if (caps & (1<<1)) 2356 sl->e->mode = IWINFO_OPMODE_ADHOC; 2357 else if (caps & (1<<0)) 2358 sl->e->mode = IWINFO_OPMODE_MASTER; 2359 else 2360 sl->e->mode = IWINFO_OPMODE_MESHPOINT; 2361 2362 if (caps & (1<<4)) 2363 sl->e->crypto.enabled = 1; 2364 2365 if (bss[NL80211_BSS_FREQUENCY]) 2366 sl->e->channel = nl80211_freq2channel(nla_get_u32( 2367 bss[NL80211_BSS_FREQUENCY])); 2368 2369 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) 2370 nl80211_get_scanlist_ie(bss, sl->e); 2371 2372 if (bss[NL80211_BSS_SIGNAL_MBM]) 2373 { 2374 sl->e->signal = 2375 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100); 2376 2377 rssi = sl->e->signal - 0x100; 2378 2379 if (rssi < -110) 2380 rssi = -110; 2381 else if (rssi > -40) 2382 rssi = -40; 2383 2384 sl->e->quality = (rssi + 110); 2385 sl->e->quality_max = 70; 2386 } 2387 2388 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version) 2389 { 2390 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; 2391 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; 2392 } 2393 2394 sl->e++; 2395 sl->len++; 2396 2397 return NL_SKIP; 2398 } 2399 2400 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len) 2401 { 2402 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf }; 2403 2404 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL)) 2405 goto out; 2406 2407 if (nl80211_wait("nl80211", "scan", 2408 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED)) 2409 goto out; 2410 2411 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, 2412 nl80211_get_scanlist_cb, &sl)) 2413 goto out; 2414 2415 *len = sl.len * sizeof(struct iwinfo_scanlist_entry); 2416 return 0; 2417 2418 out: 2419 *len = 0; 2420 return -1; 2421 } 2422 2423 static int wpasupp_ssid_decode(const char *in, char *out, int outlen) 2424 { 2425 #define hex(x) \ 2426 (((x) >= 'a') ? ((x) - 'a' + 10) : \ 2427 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - ''))) 2428 2429 int len = 0; 2430 2431 while (*in) 2432 { 2433 if (len + 1 >= outlen) 2434 break; 2435 2436 switch (*in) 2437 { 2438 case '\\': 2439 in++; 2440 switch (*in) 2441 { 2442 case 'n': 2443 out[len++] = '\n'; in++; 2444 break; 2445 2446 case 'r': 2447 out[len++] = '\r'; in++; 2448 break; 2449 2450 case 't': 2451 out[len++] = '\t'; in++; 2452 break; 2453 2454 case 'e': 2455 out[len++] = '\033'; in++; 2456 break; 2457 2458 case 'x': 2459 if (isxdigit(*(in+1)) && isxdigit(*(in+2))) 2460 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2)); 2461 in += 3; 2462 break; 2463 2464 default: 2465 out[len++] = *in++; 2466 break; 2467 } 2468 break; 2469 2470 default: 2471 out[len++] = *in++; 2472 break; 2473 } 2474 } 2475 2476 if (outlen > len) 2477 out[len] = '\0'; 2478 2479 return len; 2480 } 2481 2482 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len) 2483 { 2484 int sock, qmax, rssi, tries, count = -1, ready = 0; 2485 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096]; 2486 struct sockaddr_un local = { 0 }; 2487 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf; 2488 2489 sock = nl80211_wpactl_connect(ifname, &local); 2490 2491 if (sock < 0) 2492 return sock; 2493 2494 send(sock, "ATTACH", 6, 0); 2495 send(sock, "SCAN", 4, 0); 2496 2497 /* 2498 * wait for scan results: 2499 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan 2500 * 72 channels at most. We'll also receive two "OK" messages acknowledging 2501 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra 2502 * time to process the results, so try 72 + 2 + 1 times. 2503 */ 2504 for (tries = 0; tries < 75; tries++) 2505 { 2506 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0) 2507 continue; 2508 2509 /* got an event notification */ 2510 if (reply[0] == '<') 2511 { 2512 /* scan results are ready */ 2513 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS")) 2514 { 2515 /* send "SCAN_RESULTS" command */ 2516 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12); 2517 break; 2518 } 2519 2520 /* is another unrelated event, retry */ 2521 tries--; 2522 } 2523 2524 /* scanning already in progress, keep awaiting results */ 2525 else if (!strcmp(reply, "FAIL-BUSY\n")) 2526 { 2527 tries--; 2528 } 2529 2530 /* another failure, abort */ 2531 else if (!strncmp(reply, "FAIL-", 5)) 2532 { 2533 break; 2534 } 2535 } 2536 2537 /* receive and parse scan results if the wait above didn't time out */ 2538 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0) 2539 { 2540 /* received an event notification, receive again */ 2541 if (reply[0] == '<') 2542 continue; 2543 2544 nl80211_get_quality_max(ifname, &qmax); 2545 2546 for (line = strtok_r(reply, "\n", &pos); 2547 line != NULL; 2548 line = strtok_r(NULL, "\n", &pos)) 2549 { 2550 /* skip header line */ 2551 if (count < 0) 2552 { 2553 count++; 2554 continue; 2555 } 2556 2557 bssid = strtok(line, "\t"); 2558 freq = strtok(NULL, "\t"); 2559 signal = strtok(NULL, "\t"); 2560 flags = strtok(NULL, "\t"); 2561 ssid = strtok(NULL, "\n"); 2562 2563 if (!bssid || !freq || !signal || !flags) 2564 continue; 2565 2566 /* BSSID */ 2567 e->mac[0] = strtol(&bssid[0], NULL, 16); 2568 e->mac[1] = strtol(&bssid[3], NULL, 16); 2569 e->mac[2] = strtol(&bssid[6], NULL, 16); 2570 e->mac[3] = strtol(&bssid[9], NULL, 16); 2571 e->mac[4] = strtol(&bssid[12], NULL, 16); 2572 e->mac[5] = strtol(&bssid[15], NULL, 16); 2573 2574 /* SSID */ 2575 if (ssid) 2576 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid)); 2577 else 2578 e->ssid[0] = 0; 2579 2580 /* Mode */ 2581 if (strstr(flags, "[MESH]")) 2582 e->mode = IWINFO_OPMODE_MESHPOINT; 2583 else if (strstr(flags, "[IBSS]")) 2584 e->mode = IWINFO_OPMODE_ADHOC; 2585 else 2586 e->mode = IWINFO_OPMODE_MASTER; 2587 2588 /* Channel */ 2589 e->channel = nl80211_freq2channel(atoi(freq)); 2590 2591 /* Signal */ 2592 rssi = atoi(signal); 2593 e->signal = rssi; 2594 2595 /* Quality */ 2596 if (rssi < 0) 2597 { 2598 /* The cfg80211 wext compat layer assumes a signal range 2599 * of -110 dBm to -40 dBm, the quality value is derived 2600 * by adding 110 to the signal level */ 2601 if (rssi < -110) 2602 rssi = -110; 2603 else if (rssi > -40) 2604 rssi = -40; 2605 2606 e->quality = (rssi + 110); 2607 } 2608 else 2609 { 2610 e->quality = rssi; 2611 } 2612 2613 /* Max. Quality */ 2614 e->quality_max = qmax; 2615 2616 /* Crypto */ 2617 nl80211_get_scancrypto(flags, &e->crypto); 2618 2619 count++; 2620 e++; 2621 } 2622 2623 *len = count * sizeof(struct iwinfo_scanlist_entry); 2624 break; 2625 } 2626 2627 close(sock); 2628 unlink(local.sun_path); 2629 2630 return (count >= 0) ? 0 : -1; 2631 } 2632 2633 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len) 2634 { 2635 char *res; 2636 int rv, mode; 2637 2638 *len = 0; 2639 2640 /* Got a radioX pseudo interface, find some interface on it or create one */ 2641 if (!strncmp(ifname, "radio", 5)) 2642 { 2643 /* Reuse existing interface */ 2644 if ((res = nl80211_phy2ifname(ifname)) != NULL) 2645 { 2646 return nl80211_get_scanlist(res, buf, len); 2647 } 2648 2649 /* Need to spawn a temporary iface for scanning */ 2650 else if ((res = nl80211_ifadd(ifname)) != NULL) 2651 { 2652 rv = nl80211_get_scanlist(res, buf, len); 2653 nl80211_ifdel(res); 2654 return rv; 2655 } 2656 } 2657 2658 /* WPA supplicant */ 2659 if (!nl80211_get_scanlist_wpactl(ifname, buf, len)) 2660 { 2661 return 0; 2662 } 2663 2664 /* station / ad-hoc / monitor scan */ 2665 else if (!nl80211_get_mode(ifname, &mode) && 2666 (mode == IWINFO_OPMODE_ADHOC || 2667 mode == IWINFO_OPMODE_MASTER || 2668 mode == IWINFO_OPMODE_CLIENT || 2669 mode == IWINFO_OPMODE_MONITOR) && 2670 iwinfo_ifup(ifname)) 2671 { 2672 return nl80211_get_scanlist_nl(ifname, buf, len); 2673 } 2674 2675 /* AP scan */ 2676 else 2677 { 2678 /* Got a temp interface, don't create yet another one */ 2679 if (!strncmp(ifname, "tmp.", 4)) 2680 { 2681 if (!iwinfo_ifup(ifname)) 2682 return -1; 2683 2684 rv = nl80211_get_scanlist_nl(ifname, buf, len); 2685 iwinfo_ifdown(ifname); 2686 return rv; 2687 } 2688 2689 /* Spawn a new scan interface */ 2690 else 2691 { 2692 if (!(res = nl80211_ifadd(ifname))) 2693 return -1; 2694 2695 iwinfo_ifmac(res); 2696 2697 /* if we can take the new interface up, the driver supports an 2698 * additional interface and there's no need to tear down the ap */ 2699 if (iwinfo_ifup(res)) 2700 { 2701 rv = nl80211_get_scanlist_nl(res, buf, len); 2702 iwinfo_ifdown(res); 2703 } 2704 2705 /* driver cannot create secondary interface, take down ap 2706 * during scan */ 2707 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res)) 2708 { 2709 rv = nl80211_get_scanlist_nl(res, buf, len); 2710 iwinfo_ifdown(res); 2711 iwinfo_ifup(ifname); 2712 nl80211_hostapd_hup(ifname); 2713 } 2714 2715 nl80211_ifdel(res); 2716 return rv; 2717 } 2718 } 2719 2720 return -1; 2721 } 2722 2723 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg) 2724 { 2725 int bands_remain, freqs_remain; 2726 2727 struct nl80211_array_buf *arr = arg; 2728 struct iwinfo_freqlist_entry *e; 2729 2730 struct nlattr **attr = nl80211_parse(msg); 2731 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2732 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2733 struct nlattr *band, *freq; 2734 2735 e = arr->buf; 2736 e += arr->count; 2737 2738 if (attr[NL80211_ATTR_WIPHY_BANDS]) { 2739 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2740 { 2741 nla_parse(bands, NL80211_BAND_ATTR_MAX, 2742 nla_data(band), nla_len(band), NULL); 2743 2744 if (bands[NL80211_BAND_ATTR_FREQS]) { 2745 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) 2746 { 2747 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2748 nla_data(freq), nla_len(freq), NULL); 2749 2750 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] || 2751 freqs[NL80211_FREQUENCY_ATTR_DISABLED]) 2752 continue; 2753 2754 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]); 2755 e->channel = nl80211_freq2channel(e->mhz); 2756 2757 e->restricted = ( 2758 freqs[NL80211_FREQUENCY_ATTR_NO_IR] && 2759 !freqs[NL80211_FREQUENCY_ATTR_RADAR] 2760 ) ? 1 : 0; 2761 2762 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS]) 2763 e->flags |= IWINFO_FREQ_NO_HT40MINUS; 2764 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS]) 2765 e->flags |= IWINFO_FREQ_NO_HT40PLUS; 2766 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ]) 2767 e->flags |= IWINFO_FREQ_NO_80MHZ; 2768 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ]) 2769 e->flags |= IWINFO_FREQ_NO_160MHZ; 2770 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ]) 2771 e->flags |= IWINFO_FREQ_NO_20MHZ; 2772 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ]) 2773 e->flags |= IWINFO_FREQ_NO_10MHZ; 2774 2775 e++; 2776 arr->count++; 2777 } 2778 } 2779 } 2780 } 2781 2782 return NL_SKIP; 2783 } 2784 2785 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len) 2786 { 2787 struct nl80211_msg_conveyor *cv; 2788 struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; 2789 uint32_t features = nl80211_get_protocol_features(ifname); 2790 int flags; 2791 2792 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; 2793 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); 2794 if (!cv) 2795 goto out; 2796 2797 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); 2798 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr)) 2799 goto out; 2800 2801 *len = arr.count * sizeof(struct iwinfo_freqlist_entry); 2802 return 0; 2803 2804 nla_put_failure: 2805 nl80211_free(cv); 2806 out: 2807 *len = 0; 2808 return -1; 2809 } 2810 2811 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg) 2812 { 2813 char *buf = arg; 2814 struct nlattr **attr = nl80211_parse(msg); 2815 2816 if (attr[NL80211_ATTR_REG_ALPHA2]) 2817 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2); 2818 else 2819 buf[0] = 0; 2820 2821 return NL_SKIP; 2822 } 2823 2824 static int nl80211_get_country(const char *ifname, char *buf) 2825 { 2826 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0, 2827 nl80211_get_country_cb, buf)) 2828 return -1; 2829 2830 return 0; 2831 } 2832 2833 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len) 2834 { 2835 int count; 2836 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf; 2837 const struct iwinfo_iso3166_label *l; 2838 2839 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++) 2840 { 2841 e->iso3166 = l->iso3166; 2842 e->ccode[0] = (l->iso3166 / 256); 2843 e->ccode[1] = (l->iso3166 % 256); 2844 e->ccode[2] = 0; 2845 } 2846 2847 *len = (count * sizeof(struct iwinfo_country_entry)); 2848 return 0; 2849 } 2850 2851 2852 struct nl80211_modes 2853 { 2854 bool ok; 2855 uint32_t hw; 2856 uint32_t ht; 2857 }; 2858 2859 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg) 2860 { 2861 struct nl80211_modes *m = arg; 2862 int bands_remain, freqs_remain; 2863 uint16_t caps = 0; 2864 uint32_t vht_caps = 0; 2865 struct nlattr **attr = nl80211_parse(msg); 2866 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; 2867 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; 2868 struct nlattr *band, *freq; 2869 2870 if (attr[NL80211_ATTR_WIPHY_BANDS]) 2871 { 2872 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) 2873 { 2874 nla_parse(bands, NL80211_BAND_ATTR_MAX, 2875 nla_data(band), nla_len(band), NULL); 2876 2877 if (bands[NL80211_BAND_ATTR_HT_CAPA]) 2878 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]); 2879 2880 /* Treat any nonzero capability as 11n */ 2881 if (caps > 0) 2882 { 2883 m->hw |= IWINFO_80211_N; 2884 m->ht |= IWINFO_HTMODE_HT20; 2885 2886 if (caps & (1 << 1)) 2887 m->ht |= IWINFO_HTMODE_HT40; 2888 } 2889 2890 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], 2891 freqs_remain) 2892 { 2893 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, 2894 nla_data(freq), nla_len(freq), NULL); 2895 2896 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ]) 2897 continue; 2898 2899 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485) 2900 { 2901 m->hw |= IWINFO_80211_B; 2902 m->hw |= IWINFO_80211_G; 2903 } 2904 else if (bands[NL80211_BAND_ATTR_VHT_CAPA]) 2905 { 2906 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]); 2907 2908 /* Treat any nonzero capability as 11ac */ 2909 if (vht_caps > 0) 2910 { 2911 m->hw |= IWINFO_80211_AC; 2912 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80; 2913 2914 switch ((vht_caps >> 2) & 3) 2915 { 2916 case 2: 2917 m->ht |= IWINFO_HTMODE_VHT80_80; 2918 /* fall through */ 2919 2920 case 1: 2921 m->ht |= IWINFO_HTMODE_VHT160; 2922 } 2923 } 2924 } 2925 else if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) >= 56160) 2926 { 2927 m->hw |= IWINFO_80211_AD; 2928 } 2929 else if (!(m->hw & IWINFO_80211_AC)) 2930 { 2931 m->hw |= IWINFO_80211_A; 2932 } 2933 } 2934 } 2935 2936 m->ok = 1; 2937 } 2938 2939 return NL_SKIP; 2940 } 2941 2942 static int nl80211_get_hwmodelist(const char *ifname, int *buf) 2943 { 2944 struct nl80211_modes m = { 0 }; 2945 2946 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 2947 nl80211_get_modelist_cb, &m)) 2948 goto out; 2949 2950 if (!m.ok) 2951 goto out; 2952 2953 *buf = m.hw; 2954 return 0; 2955 2956 out: 2957 *buf = 0; 2958 return -1; 2959 } 2960 2961 struct chan_info { 2962 int width; 2963 int mode; 2964 }; 2965 2966 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg) 2967 { 2968 struct nlattr **tb = nl80211_parse(msg); 2969 struct nlattr *cur; 2970 struct chan_info *chn = arg; 2971 2972 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH])) 2973 chn->width = nla_get_u32(cur); 2974 2975 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE])) 2976 chn->mode = nla_get_u32(cur); 2977 2978 return NL_SKIP; 2979 } 2980 2981 static int nl80211_get_htmode(const char *ifname, int *buf) 2982 { 2983 struct chan_info chn = { .width = 0, .mode = 0 }; 2984 char *res; 2985 int err; 2986 2987 res = nl80211_phy2ifname(ifname); 2988 *buf = 0; 2989 2990 err = nl80211_request(res ? res : ifname, 2991 NL80211_CMD_GET_INTERFACE, 0, 2992 nl80211_get_htmode_cb, &chn); 2993 if (err) 2994 return -1; 2995 2996 switch (chn.width) { 2997 case NL80211_CHAN_WIDTH_20: 2998 if (chn.mode == -1) 2999 *buf = IWINFO_HTMODE_VHT20; 3000 else 3001 *buf = IWINFO_HTMODE_HT20; 3002 break; 3003 case NL80211_CHAN_WIDTH_40: 3004 if (chn.mode == -1) 3005 *buf = IWINFO_HTMODE_VHT40; 3006 else 3007 *buf = IWINFO_HTMODE_HT40; 3008 break; 3009 case NL80211_CHAN_WIDTH_80: 3010 *buf = IWINFO_HTMODE_VHT80; 3011 break; 3012 case NL80211_CHAN_WIDTH_80P80: 3013 *buf = IWINFO_HTMODE_VHT80_80; 3014 break; 3015 case NL80211_CHAN_WIDTH_160: 3016 *buf = IWINFO_HTMODE_VHT160; 3017 break; 3018 case NL80211_CHAN_WIDTH_5: 3019 case NL80211_CHAN_WIDTH_10: 3020 case NL80211_CHAN_WIDTH_20_NOHT: 3021 *buf = IWINFO_HTMODE_NOHT; 3022 break; 3023 default: 3024 return -1; 3025 } 3026 3027 return 0; 3028 } 3029 3030 static int nl80211_get_htmodelist(const char *ifname, int *buf) 3031 { 3032 struct nl80211_modes m = { 0 }; 3033 3034 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 3035 nl80211_get_modelist_cb, &m)) 3036 goto out; 3037 3038 if (!m.ok) 3039 goto out; 3040 3041 *buf = m.ht; 3042 return 0; 3043 3044 out: 3045 *buf = 0; 3046 return -1; 3047 } 3048 3049 3050 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg) 3051 { 3052 struct nlattr **attr = nl80211_parse(msg); 3053 struct nlattr *comb; 3054 int *ret = arg; 3055 int comb_rem, limit_rem, mode_rem; 3056 3057 *ret = 0; 3058 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS]) 3059 return NL_SKIP; 3060 3061 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem) 3062 { 3063 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = { 3064 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED }, 3065 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 }, 3066 }; 3067 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1]; 3068 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = { 3069 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED }, 3070 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 }, 3071 }; 3072 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1]; 3073 struct nlattr *limit; 3074 3075 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy); 3076 3077 if (!tb_comb[NL80211_IFACE_COMB_LIMITS]) 3078 continue; 3079 3080 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem) 3081 { 3082 struct nlattr *mode; 3083 3084 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy); 3085 3086 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] || 3087 !tb_limit[NL80211_IFACE_LIMIT_MAX]) 3088 continue; 3089 3090 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2) 3091 continue; 3092 3093 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) { 3094 if (nla_type(mode) == NL80211_IFTYPE_AP) 3095 *ret = 1; 3096 } 3097 } 3098 } 3099 3100 return NL_SKIP; 3101 } 3102 3103 static int nl80211_get_mbssid_support(const char *ifname, int *buf) 3104 { 3105 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, 3106 nl80211_get_ifcomb_cb, buf)) 3107 return -1; 3108 3109 return 0; 3110 } 3111 3112 static int nl80211_get_hardware_id(const char *ifname, char *buf) 3113 { 3114 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf; 3115 char *phy, num[8], path[PATH_MAX]; 3116 int i; 3117 3118 struct { const char *path; uint16_t *dest; } lookup[] = { 3119 { "vendor", &id->vendor_id }, 3120 { "device", &id->device_id }, 3121 { "subsystem_vendor", &id->subsystem_vendor_id }, 3122 { "subsystem_device", &id->subsystem_device_id } 3123 }; 3124 3125 memset(id, 0, sizeof(*id)); 3126 3127 /* Try to determine the phy name from the given interface */ 3128 phy = nl80211_ifname2phy(ifname); 3129 3130 for (i = 0; i < ARRAY_SIZE(lookup); i++) 3131 { 3132 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s", 3133 phy ? "ieee80211" : "net", 3134 phy ? phy : ifname, lookup[i].path); 3135 3136 if (nl80211_readstr(path, num, sizeof(num)) > 0) 3137 *lookup[i].dest = strtoul(num, NULL, 16); 3138 } 3139 3140 /* Failed to obtain hardware IDs, search board config */ 3141 if (id->vendor_id == 0 || id->device_id == 0) 3142 return iwinfo_hardware_id_from_mtd(id); 3143 3144 return 0; 3145 } 3146 3147 static const struct iwinfo_hardware_entry * 3148 nl80211_get_hardware_entry(const char *ifname) 3149 { 3150 struct iwinfo_hardware_id id; 3151 3152 if (nl80211_get_hardware_id(ifname, (char *)&id)) 3153 return NULL; 3154 3155 return iwinfo_hardware(&id); 3156 } 3157 3158 static int nl80211_get_hardware_name(const char *ifname, char *buf) 3159 { 3160 const struct iwinfo_hardware_entry *hw; 3161 3162 if (!(hw = nl80211_get_hardware_entry(ifname))) 3163 sprintf(buf, "Generic MAC80211"); 3164 else 3165 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name); 3166 3167 return 0; 3168 } 3169 3170 static int nl80211_get_txpower_offset(const char *ifname, int *buf) 3171 { 3172 const struct iwinfo_hardware_entry *hw; 3173 3174 if (!(hw = nl80211_get_hardware_entry(ifname))) 3175 return -1; 3176 3177 *buf = hw->txpower_offset; 3178 return 0; 3179 } 3180 3181 static int nl80211_get_frequency_offset(const char *ifname, int *buf) 3182 { 3183 const struct iwinfo_hardware_entry *hw; 3184 3185 if (!(hw = nl80211_get_hardware_entry(ifname))) 3186 return -1; 3187 3188 *buf = hw->frequency_offset; 3189 return 0; 3190 } 3191 3192 static int nl80211_lookup_phyname(const char *section, char *buf) 3193 { 3194 int idx; 3195 3196 if ((idx = nl80211_phy_idx_from_uci(section)) < 0) 3197 return -1; 3198 3199 sprintf(buf, "phy%d", idx); 3200 return 0; 3201 } 3202 3203 const struct iwinfo_ops nl80211_ops = { 3204 .name = "nl80211", 3205 .probe = nl80211_probe, 3206 .channel = nl80211_get_channel, 3207 .frequency = nl80211_get_frequency, 3208 .frequency_offset = nl80211_get_frequency_offset, 3209 .txpower = nl80211_get_txpower, 3210 .txpower_offset = nl80211_get_txpower_offset, 3211 .bitrate = nl80211_get_bitrate, 3212 .signal = nl80211_get_signal, 3213 .noise = nl80211_get_noise, 3214 .quality = nl80211_get_quality, 3215 .quality_max = nl80211_get_quality_max, 3216 .mbssid_support = nl80211_get_mbssid_support, 3217 .hwmodelist = nl80211_get_hwmodelist, 3218 .htmodelist = nl80211_get_htmodelist, 3219 .htmode = nl80211_get_htmode, 3220 .mode = nl80211_get_mode, 3221 .ssid = nl80211_get_ssid, 3222 .bssid = nl80211_get_bssid, 3223 .country = nl80211_get_country, 3224 .hardware_id = nl80211_get_hardware_id, 3225 .hardware_name = nl80211_get_hardware_name, 3226 .encryption = nl80211_get_encryption, 3227 .phyname = nl80211_get_phyname, 3228 .assoclist = nl80211_get_assoclist, 3229 .txpwrlist = nl80211_get_txpwrlist, 3230 .scanlist = nl80211_get_scanlist, 3231 .freqlist = nl80211_get_freqlist, 3232 .countrylist = nl80211_get_countrylist, 3233 .survey = nl80211_get_survey, 3234 .lookup_phy = nl80211_lookup_phyname, 3235 .close = nl80211_close 3236 }; 3237
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