iwinfo_nl80211.c

   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
  30 #include "iwinfo_nl80211.h"
  31
  32 #define min(x, y) ((x) < (y)) ? (x) : (y)
  33
  34 #define BIT(x) (1ULL<<(x))
  35
  36 static struct nl80211_state *nls = NULL;
  37
  38 static void nl80211_close(void)
  39 {
  40         if (nls)
  41         {
  42                 if (nls->nlctrl)
  43                         genl_family_put(nls->nlctrl);
  44
  45                 if (nls->nl80211)
  46                         genl_family_put(nls->nl80211);
  47
  48                 if (nls->nl_sock)
  49                         nl_socket_free(nls->nl_sock);
  50
  51                 if (nls->nl_cache)
  52                         nl_cache_free(nls->nl_cache);
  53
  54                 free(nls);
  55                 nls = NULL;
  56         }
  57 }
  58
  59 static int nl80211_init(void)
  60 {
  61         int err, fd;
  62
  63         if (!nls)
  64         {
  65                 nls = malloc(sizeof(struct nl80211_state));
  66                 if (!nls) {
  67                         err = -ENOMEM;
  68                         goto err;
  69                 }
  70
  71                 memset(nls, 0, sizeof(*nls));
  72
  73                 nls->nl_sock = nl_socket_alloc();
  74                 if (!nls->nl_sock) {
  75                         err = -ENOMEM;
  76                         goto err;
  77                 }
  78
  79                 if (genl_connect(nls->nl_sock)) {
  80                         err = -ENOLINK;
  81                         goto err;
  82                 }
  83
  84                 fd = nl_socket_get_fd(nls->nl_sock);
  85                 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
  86                         err = -EINVAL;
  87                         goto err;
  88                 }
  89
  90                 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
  91                         err = -ENOMEM;
  92                         goto err;
  93                 }
  94
  95                 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
  96                 if (!nls->nl80211) {
  97                         err = -ENOENT;
  98                         goto err;
  99                 }
 100
 101                 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
 102                 if (!nls->nlctrl) {
 103                         err = -ENOENT;
 104                         goto err;
 105                 }
 106         }
 107
 108         return 0;
 109
 110
 111 err:
 112         nl80211_close();
 113         return err;
 114 }
 115
 116 static int nl80211_readint(const char *path)
 117 {
 118         int fd;
 119         int rv = -1;
 120         char buffer[16];
 121
 122         if ((fd = open(path, O_RDONLY)) > -1)
 123         {
 124                 if (read(fd, buffer, sizeof(buffer)) > 0)
 125                         rv = atoi(buffer);
 126
 127                 close(fd);
 128         }
 129
 130         return rv;
 131 }
 132
 133 static int nl80211_readstr(const char *path, char *buffer, int length)
 134 {
 135         int fd;
 136         int rv = -1;
 137
 138         if ((fd = open(path, O_RDONLY)) > -1)
 139         {
 140                 if ((rv = read(fd, buffer, length - 1)) > 0)
 141                 {
 142                         if (buffer[rv - 1] == '\n')
 143                                 rv--;
 144
 145                         buffer[rv] = 0;
 146                 }
 147
 148                 close(fd);
 149         }
 150
 151         return rv;
 152 }
 153
 154
 155 static int nl80211_msg_error(struct sockaddr_nl *nla,
 156         struct nlmsgerr *err, void *arg)
 157 {
 158         int *ret = arg;
 159         *ret = err->error;
 160         return NL_STOP;
 161 }
 162
 163 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
 164 {
 165         int *ret = arg;
 166         *ret = 0;
 167         return NL_SKIP;
 168 }
 169
 170 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
 171 {
 172         int *ret = arg;
 173         *ret = 0;
 174         return NL_STOP;
 175 }
 176
 177 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
 178 {
 179         return NL_SKIP;
 180 }
 181
 182 static void nl80211_free(struct nl80211_msg_conveyor *cv)
 183 {
 184         if (cv)
 185         {
 186                 if (cv->cb)
 187                         nl_cb_put(cv->cb);
 188
 189                 if (cv->msg)
 190                         nlmsg_free(cv->msg);
 191
 192                 cv->cb  = NULL;
 193                 cv->msg = NULL;
 194         }
 195 }
 196
 197 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
 198                                                  int cmd, int flags)
 199 {
 200         static struct nl80211_msg_conveyor cv;
 201
 202         struct nl_msg *req = NULL;
 203         struct nl_cb *cb = NULL;
 204
 205         req = nlmsg_alloc();
 206         if (!req)
 207                 goto err;
 208
 209         cb = nl_cb_alloc(NL_CB_DEFAULT);
 210         if (!cb)
 211                 goto err;
 212
 213         genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
 214
 215         cv.msg = req;
 216         cv.cb  = cb;
 217
 218         return &cv;
 219
 220 err:
 221         if (req)
 222                 nlmsg_free(req);
 223
 224         return NULL;
 225 }
 226
 227 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
 228 {
 229         if (nl80211_init() < 0)
 230                 return NULL;
 231
 232         return nl80211_new(nls->nlctrl, cmd, flags);
 233 }
 234
 235 static int nl80211_phy_idx_from_uci_path(struct uci_section *s)
 236 {
 237         const char *opt;
 238         char buf[128];
 239         int idx = -1;
 240         glob_t gl;
 241
 242         opt = uci_lookup_option_string(uci_ctx, s, "path");
 243         if (!opt)
 244                 return -1;
 245
 246         snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt);  /**/
 247         if (glob(buf, 0, NULL, &gl))
 248                 snprintf(buf, sizeof(buf), "/sys/devices/platform/%s/ieee80211/*/index", opt);  /**/
 249
 250         if (glob(buf, 0, NULL, &gl))
 251                 return -1;
 252
 253         if (gl.gl_pathc > 0)
 254                 idx = nl80211_readint(gl.gl_pathv[0]);
 255
 256         globfree(&gl);
 257
 258         return idx;
 259 }
 260
 261 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
 262 {
 263         const char *opt;
 264         char buf[128];
 265         int i, idx = -1;
 266         glob_t gl;
 267
 268         opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
 269         if (!opt)
 270                 return -1;
 271
 272         snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*");   /**/
 273         if (glob(buf, 0, NULL, &gl))
 274                 return -1;
 275
 276         for (i = 0; i < gl.gl_pathc; i++)
 277         {
 278                 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
 279                 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
 280                         continue;
 281
 282                 if (fnmatch(opt, buf, FNM_CASEFOLD))
 283                         continue;
 284
 285                 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
 286                 if ((idx = nl80211_readint(buf)) > -1)
 287                         break;
 288         }
 289
 290         globfree(&gl);
 291
 292         return idx;
 293 }
 294
 295 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
 296 {
 297         const char *opt;
 298         char buf[128];
 299
 300         opt = uci_lookup_option_string(uci_ctx, s, "phy");
 301         if (!opt)
 302                 return -1;
 303
 304         snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
 305         return nl80211_readint(buf);
 306 }
 307
 308 static int nl80211_phy_idx_from_uci(const char *name)
 309 {
 310         struct uci_section *s;
 311         int idx = -1;
 312
 313         s = iwinfo_uci_get_radio(name, "mac80211");
 314         if (!s)
 315                 goto free;
 316
 317         idx = nl80211_phy_idx_from_uci_path(s);
 318
 319         if (idx < 0)
 320                 idx = nl80211_phy_idx_from_uci_macaddr(s);
 321
 322         if (idx < 0)
 323                 idx = nl80211_phy_idx_from_uci_phy(s);
 324
 325 free:
 326         iwinfo_uci_free();
 327         return idx;
 328 }
 329
 330 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
 331                                                  int cmd, int flags)
 332 {
 333         int ifidx = -1, phyidx = -1;
 334         struct nl80211_msg_conveyor *cv;
 335
 336         if (ifname == NULL)
 337                 return NULL;
 338
 339         if (nl80211_init() < 0)
 340                 return NULL;
 341
 342         if (!strncmp(ifname, "phy", 3))
 343                 phyidx = atoi(&ifname[3]);
 344         else if (!strncmp(ifname, "radio", 5))
 345                 phyidx = nl80211_phy_idx_from_uci(ifname);
 346         else if (!strncmp(ifname, "mon.", 4))
 347                 ifidx = if_nametoindex(&ifname[4]);
 348         else
 349                 ifidx = if_nametoindex(ifname);
 350
 351         /* Valid ifidx must be greater than 0 */
 352         if ((ifidx <= 0) && (phyidx < 0))
 353                 return NULL;
 354
 355         cv = nl80211_new(nls->nl80211, cmd, flags);
 356         if (!cv)
 357                 return NULL;
 358
 359         if (ifidx > -1)
 360                 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
 361
 362         if (phyidx > -1)
 363                 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
 364
 365         return cv;
 366
 367 nla_put_failure:
 368         nl80211_free(cv);
 369         return NULL;
 370 }
 371
 372 static struct nl80211_msg_conveyor * nl80211_send(
 373         struct nl80211_msg_conveyor *cv,
 374         int (*cb_func)(struct nl_msg *, void *), void *cb_arg
 375 ) {
 376         static struct nl80211_msg_conveyor rcv;
 377         int err = 1;
 378
 379         if (cb_func)
 380                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
 381         else
 382                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
 383
 384         if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
 385                 goto err;
 386
 387         nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
 388         nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
 389         nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
 390
 391         while (err > 0)
 392                 nl_recvmsgs(nls->nl_sock, cv->cb);
 393
 394         return &rcv;
 395
 396 err:
 397         nl_cb_put(cv->cb);
 398         nlmsg_free(cv->msg);
 399
 400         return NULL;
 401 }
 402
 403 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
 404 {
 405         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 406         static struct nlattr *attr[NL80211_ATTR_MAX + 1];
 407
 408         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 409                   genlmsg_attrlen(gnlh, 0), NULL);
 410
 411         return attr;
 412 }
 413
 414
 415 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
 416 {
 417         struct nl80211_group_conveyor *cv = arg;
 418
 419         struct nlattr **attr = nl80211_parse(msg);
 420         struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
 421         struct nlattr *mgrp;
 422         int mgrpidx;
 423
 424         if (!attr[CTRL_ATTR_MCAST_GROUPS])
 425                 return NL_SKIP;
 426
 427         nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
 428         {
 429                 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
 430                           nla_data(mgrp), nla_len(mgrp), NULL);
 431
 432                 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
 433                     mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
 434                     !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
 435                              cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
 436                 {
 437                         cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
 438                         break;
 439                 }
 440         }
 441
 442         return NL_SKIP;
 443 }
 444
 445 static int nl80211_subscribe(const char *family, const char *group)
 446 {
 447         struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
 448         struct nl80211_msg_conveyor *req;
 449
 450         req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
 451         if (req)
 452         {
 453                 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
 454                 nl80211_send(req, nl80211_subscribe_cb, &cv);
 455
 456 nla_put_failure:
 457                 nl80211_free(req);
 458         }
 459
 460         return nl_socket_add_membership(nls->nl_sock, cv.id);
 461 }
 462
 463
 464 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
 465 {
 466         struct nl80211_event_conveyor *cv = arg;
 467         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 468
 469         if (gnlh->cmd == cv->wait)
 470                 cv->recv = gnlh->cmd;
 471
 472         return NL_SKIP;
 473 }
 474
 475 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
 476 {
 477         return NL_OK;
 478 }
 479
 480 static int nl80211_wait(const char *family, const char *group, int cmd)
 481 {
 482         struct nl80211_event_conveyor cv = { .wait = cmd };
 483         struct nl_cb *cb;
 484         int err = 0;
 485
 486         if (nl80211_subscribe(family, group))
 487                 return -ENOENT;
 488
 489         cb = nl_cb_alloc(NL_CB_DEFAULT);
 490
 491         if (!cb)
 492                 return -ENOMEM;
 493
 494         nl_cb_err(cb,                  NL_CB_CUSTOM, nl80211_msg_error,      &err);
 495         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
 496         nl_cb_set(cb, NL_CB_VALID,     NL_CB_CUSTOM, nl80211_wait_cb,        &cv );
 497
 498         while (!cv.recv && !err)
 499                 nl_recvmsgs(nls->nl_sock, cb);
 500
 501         nl_cb_put(cb);
 502
 503         return err;
 504 }
 505
 506
 507 static int nl80211_freq2channel(int freq)
 508 {
 509         if (freq == 2484)
 510                 return 14;
 511         else if (freq < 2484)
 512                 return (freq - 2407) / 5;
 513         else if (freq >= 4910 && freq <= 4980)
 514                 return (freq - 4000) / 5;
 515         else
 516                 return (freq - 5000) / 5;
 517 }
 518
 519 static int nl80211_channel2freq(int channel, const char *band)
 520 {
 521         if (!band || band[0] != 'a')
 522         {
 523                 if (channel == 14)
 524                         return 2484;
 525                 else if (channel < 14)
 526                         return (channel * 5) + 2407;
 527         }
 528         else
 529         {
 530                 if (channel >= 182 && channel <= 196)
 531                         return (channel * 5) + 4000;
 532                 else
 533                         return (channel * 5) + 5000;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
 540 {
 541         char *buf = arg;
 542         struct nlattr **attr = nl80211_parse(msg);
 543
 544         if (attr[NL80211_ATTR_WIPHY_NAME])
 545                 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
 546                        nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
 547         else
 548                 buf[0] = 0;
 549
 550         return NL_SKIP;
 551 }
 552
 553 static char * nl80211_ifname2phy(const char *ifname)
 554 {
 555         static char phy[32] = { 0 };
 556         struct nl80211_msg_conveyor *req;
 557
 558         memset(phy, 0, sizeof(phy));
 559
 560         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
 561         if (req)
 562         {
 563                 nl80211_send(req, nl80211_ifname2phy_cb, phy);
 564                 nl80211_free(req);
 565         }
 566
 567         return phy[0] ? phy : NULL;
 568 }
 569
 570 static char * nl80211_phy2ifname(const char *ifname)
 571 {
 572         int ifidx = -1, cifidx = -1, phyidx = -1;
 573         char buffer[64];
 574         static char nif[IFNAMSIZ] = { 0 };
 575
 576         DIR *d;
 577         struct dirent *e;
 578
 579         /* Only accept phy name of the form phy%d or radio%d */
 580         if (!ifname)
 581                 return NULL;
 582         else if (!strncmp(ifname, "phy", 3))
 583                 phyidx = atoi(&ifname[3]);
 584         else if (!strncmp(ifname, "radio", 5))
 585                 phyidx = nl80211_phy_idx_from_uci(ifname);
 586         else
 587                 return NULL;
 588
 589         memset(nif, 0, sizeof(nif));
 590
 591         if (phyidx > -1)
 592         {
 593                 if ((d = opendir("/sys/class/net")) != NULL)
 594                 {
 595                         while ((e = readdir(d)) != NULL)
 596                         {
 597                                 snprintf(buffer, sizeof(buffer),
 598                                          "/sys/class/net/%s/phy80211/index", e->d_name);
 599
 600                                 if (nl80211_readint(buffer) == phyidx)
 601                                 {
 602                                         snprintf(buffer, sizeof(buffer),
 603                                                  "/sys/class/net/%s/ifindex", e->d_name);
 604
 605                                         if ((cifidx = nl80211_readint(buffer)) >= 0 &&
 606                                             ((ifidx < 0) || (cifidx < ifidx)))
 607                                         {
 608                                                 ifidx = cifidx;
 609                                                 strncpy(nif, e->d_name, sizeof(nif) - 1);
 610                                         }
 611                                 }
 612                         }
 613
 614                         closedir(d);
 615                 }
 616         }
 617
 618         return nif[0] ? nif : NULL;
 619 }
 620
 621 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
 622 {
 623         int *mode = arg;
 624         struct nlattr **tb = nl80211_parse(msg);
 625         const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
 626                 IWINFO_OPMODE_UNKNOWN,          /* unspecified */
 627                 IWINFO_OPMODE_ADHOC,            /* IBSS */
 628                 IWINFO_OPMODE_CLIENT,           /* managed */
 629                 IWINFO_OPMODE_MASTER,           /* AP */
 630                 IWINFO_OPMODE_AP_VLAN,          /* AP/VLAN */
 631                 IWINFO_OPMODE_WDS,                      /* WDS */
 632                 IWINFO_OPMODE_MONITOR,          /* monitor */
 633                 IWINFO_OPMODE_MESHPOINT,        /* mesh point */
 634                 IWINFO_OPMODE_P2P_CLIENT,       /* P2P-client */
 635                 IWINFO_OPMODE_P2P_GO,           /* P2P-GO */
 636         };
 637
 638         if (tb[NL80211_ATTR_IFTYPE])
 639                 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
 640
 641         return NL_SKIP;
 642 }
 643
 644
 645 static int nl80211_get_mode(const char *ifname, int *buf)
 646 {
 647         char *res;
 648         struct nl80211_msg_conveyor *req;
 649
 650         res = nl80211_phy2ifname(ifname);
 651         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 652         *buf = IWINFO_OPMODE_UNKNOWN;
 653
 654         if (req)
 655         {
 656                 nl80211_send(req, nl80211_get_mode_cb, buf);
 657                 nl80211_free(req);
 658         }
 659
 660         return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
 661 }
 662
 663 static int __nl80211_hostapd_query(const char *ifname, ...)
 664 {
 665         va_list ap, ap_cur;
 666         char *phy, *search, *dest, *key, *val, buf[128];
 667         int len, mode, found = 0, match = 1;
 668         FILE *fp;
 669
 670         if (nl80211_get_mode(ifname, &mode))
 671                 return 0;
 672
 673         if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
 674                 return 0;
 675
 676         phy = nl80211_ifname2phy(ifname);
 677
 678         if (!phy)
 679                 return 0;
 680
 681         snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
 682         fp = fopen(buf, "r");
 683
 684         if (!fp)
 685                 return 0;
 686
 687         va_start(ap, ifname);
 688
 689         /* clear all destination buffers */
 690         va_copy(ap_cur, ap);
 691
 692         while ((search = va_arg(ap_cur, char *)) != NULL)
 693         {
 694                 dest = va_arg(ap_cur, char *);
 695                 len  = va_arg(ap_cur, int);
 696
 697                 memset(dest, 0, len);
 698         }
 699
 700         va_end(ap_cur);
 701
 702         /* iterate applicable lines and copy found values into dest buffers */
 703         while (fgets(buf, sizeof(buf), fp))
 704         {
 705                 key = strtok(buf, " =\t\n");
 706                 val = strtok(NULL, "\n");
 707
 708                 if (!key || !val || !*key || *key == '#')
 709                         continue;
 710
 711                 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
 712                         match = !strcmp(ifname, val);
 713
 714                 if (!match)
 715                         continue;
 716
 717                 va_copy(ap_cur, ap);
 718
 719                 while ((search = va_arg(ap_cur, char *)) != NULL)
 720                 {
 721                         dest = va_arg(ap_cur, char *);
 722                         len  = va_arg(ap_cur, int);
 723
 724                         if (!strcmp(search, key))
 725                         {
 726                                 strncpy(dest, val, len - 1);
 727                                 found++;
 728                                 break;
 729                         }
 730                 }
 731
 732                 va_end(ap_cur);
 733         }
 734
 735         fclose(fp);
 736
 737         va_end(ap);
 738
 739         return found;
 740 }
 741
 742 #define nl80211_hostapd_query(ifname, ...) \
 743         __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
 744
 745
 746 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
 747 {
 748         fd_set rfds;
 749         struct timeval tv = { 0, 256000 };
 750
 751         FD_ZERO(&rfds);
 752         FD_SET(sock, &rfds);
 753
 754         memset(buf, 0, blen);
 755
 756         if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
 757                 return -1;
 758
 759         if (!FD_ISSET(sock, &rfds))
 760                 return -1;
 761
 762         return recv(sock, buf, blen - 1, 0);
 763 }
 764
 765 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
 766 {
 767         struct sockaddr_un remote = { 0 };
 768         size_t remote_length, local_length;
 769
 770         int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
 771         if (sock < 0)
 772                 return sock;
 773
 774         remote.sun_family = AF_UNIX;
 775         remote_length = sizeof(remote.sun_family) +
 776                 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
 777                         ifname, ifname);
 778
 779         if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
 780         {
 781                 close(sock);
 782                 return -1;
 783         }
 784
 785         if (connect(sock, (struct sockaddr *)&remote, remote_length))
 786         {
 787                 remote_length = sizeof(remote.sun_family) +
 788                         sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
 789
 790                 if (connect(sock, (struct sockaddr *)&remote, remote_length))
 791                 {
 792                         close(sock);
 793                         return -1;
 794                 }
 795         }
 796
 797         local->sun_family = AF_UNIX;
 798         local_length = sizeof(local->sun_family) +
 799                 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
 800
 801         if (bind(sock, (struct sockaddr *)local, local_length) < 0)
 802         {
 803                 close(sock);
 804                 return -1;
 805         }
 806
 807         return sock;
 808 }
 809
 810 static int __nl80211_wpactl_query(const char *ifname, ...)
 811 {
 812         va_list ap, ap_cur;
 813         struct sockaddr_un local = { 0 };
 814         int len, mode, found = 0, sock = -1;
 815         char *search, *dest, *key, *val, *line, *pos, buf[512];
 816
 817         if (nl80211_get_mode(ifname, &mode))
 818                 return 0;
 819
 820         if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC)
 821                 return 0;
 822
 823         sock = nl80211_wpactl_connect(ifname, &local);
 824
 825         if (sock < 0)
 826                 return 0;
 827
 828         va_start(ap, ifname);
 829
 830         /* clear all destination buffers */
 831         va_copy(ap_cur, ap);
 832
 833         while ((search = va_arg(ap_cur, char *)) != NULL)
 834         {
 835                 dest = va_arg(ap_cur, char *);
 836                 len  = va_arg(ap_cur, int);
 837
 838                 memset(dest, 0, len);
 839         }
 840
 841         va_end(ap_cur);
 842
 843         send(sock, "STATUS", 6, 0);
 844
 845         while (true)
 846         {
 847                 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
 848                         break;
 849
 850                 if (buf[0] == '<')
 851                         continue;
 852
 853                 for (line = strtok_r(buf, "\n", &pos);
 854                          line != NULL;
 855                          line = strtok_r(NULL, "\n", &pos))
 856                 {
 857                         key = strtok(line, "=");
 858                         val = strtok(NULL, "\n");
 859
 860                         if (!key || !val)
 861                                 continue;
 862
 863                         va_copy(ap_cur, ap);
 864
 865                         while ((search = va_arg(ap_cur, char *)) != NULL)
 866                         {
 867                                 dest = va_arg(ap_cur, char *);
 868                                 len  = va_arg(ap_cur, int);
 869
 870                                 if (!strcmp(search, key))
 871                                 {
 872                                         strncpy(dest, val, len - 1);
 873                                         found++;
 874                                         break;
 875                                 }
 876                         }
 877
 878                         va_end(ap_cur);
 879                 }
 880
 881                 break;
 882         }
 883
 884         va_end(ap);
 885
 886         close(sock);
 887         unlink(local.sun_path);
 888
 889         return found;
 890 }
 891
 892 #define nl80211_wpactl_query(ifname, ...) \
 893         __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
 894
 895
 896 static char * nl80211_ifadd(const char *ifname)
 897 {
 898         char *rv = NULL, path[PATH_MAX];
 899         static char nif[IFNAMSIZ] = { 0 };
 900         struct nl80211_msg_conveyor *req;
 901         FILE *sysfs;
 902
 903         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 904         if (req)
 905         {
 906                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 907
 908                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 909                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 910
 911                 nl80211_send(req, NULL, NULL);
 912
 913                 snprintf(path, sizeof(path) - 1,
 914                          "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
 915
 916                 if ((sysfs = fopen(path, "w")) != NULL)
 917                 {
 918                         fwrite("0\n", 1, 2, sysfs);
 919                         fclose(sysfs);
 920                 }
 921
 922                 rv = nif;
 923
 924         nla_put_failure:
 925                 nl80211_free(req);
 926         }
 927
 928         return rv;
 929 }
 930
 931 static void nl80211_ifdel(const char *ifname)
 932 {
 933         struct nl80211_msg_conveyor *req;
 934
 935         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 936         if (req)
 937         {
 938                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 939
 940                 nl80211_send(req, NULL, NULL);
 941
 942         nla_put_failure:
 943                 nl80211_free(req);
 944         }
 945 }
 946
 947 static void nl80211_hostapd_hup(const char *ifname)
 948 {
 949         int fd, pid = 0;
 950         char buf[32];
 951         char *phy = nl80211_ifname2phy(ifname);
 952
 953         if (phy)
 954         {
 955                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 956                 if ((fd = open(buf, O_RDONLY)) >= 0)
 957                 {
 958                         if (read(fd, buf, sizeof(buf)) > 0)
 959                                 pid = atoi(buf);
 960
 961                         close(fd);
 962                 }
 963
 964                 if (pid > 0)
 965                         kill(pid, 1);
 966         }
 967 }
 968
 969
 970 static int nl80211_probe(const char *ifname)
 971 {
 972         return !!nl80211_ifname2phy(ifname);
 973 }
 974
 975 struct nl80211_ssid_bssid {
 976         unsigned char *ssid;
 977         unsigned char bssid[7];
 978 };
 979
 980 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
 981 {
 982         int ielen;
 983         unsigned char *ie;
 984         struct nl80211_ssid_bssid *sb = arg;
 985         struct nlattr **tb = nl80211_parse(msg);
 986         struct nlattr *bss[NL80211_BSS_MAX + 1];
 987
 988         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 989                 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
 990                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
 991         };
 992
 993         if (!tb[NL80211_ATTR_BSS] ||
 994             nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
 995                              bss_policy) ||
 996             !bss[NL80211_BSS_BSSID] ||
 997             !bss[NL80211_BSS_STATUS] ||
 998             !bss[NL80211_BSS_INFORMATION_ELEMENTS])
 999         {
1000                 return NL_SKIP;
1001         }
1002
1003         switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1004         {
1005         case NL80211_BSS_STATUS_ASSOCIATED:
1006         case NL80211_BSS_STATUS_AUTHENTICATED:
1007         case NL80211_BSS_STATUS_IBSS_JOINED:
1008
1009                 if (sb->ssid)
1010                 {
1011                         ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1012                         ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1013
1014                         while (ielen >= 2 && ielen >= ie[1])
1015                         {
1016                                 if (ie[0] == 0)
1017                                 {
1018                                         memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1019                                         return NL_SKIP;
1020                                 }
1021
1022                                 ielen -= ie[1] + 2;
1023                                 ie += ie[1] + 2;
1024                         }
1025                 }
1026                 else
1027                 {
1028                         sb->bssid[0] = 1;
1029                         memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1030                         return NL_SKIP;
1031                 }
1032
1033         default:
1034                 return NL_SKIP;
1035         }
1036 }
1037
1038 static int nl80211_get_ssid(const char *ifname, char *buf)
1039 {
1040         char *res;
1041         struct nl80211_msg_conveyor *req;
1042         struct nl80211_ssid_bssid sb;
1043
1044         /* try to find ssid from scan dump results */
1045         res = nl80211_phy2ifname(ifname);
1046         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1047
1048         sb.ssid = (unsigned char *)buf;
1049         *buf = 0;
1050
1051         if (req)
1052         {
1053                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
1054                 nl80211_free(req);
1055         }
1056
1057         /* failed, try to find from hostapd info */
1058         if (*buf == 0)
1059                 nl80211_hostapd_query(ifname, "ssid", buf, IWINFO_ESSID_MAX_SIZE + 1);
1060
1061         return (*buf == 0) ? -1 : 0;
1062 }
1063
1064 static int nl80211_get_bssid(const char *ifname, char *buf)
1065 {
1066         char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1067         struct nl80211_msg_conveyor *req;
1068         struct nl80211_ssid_bssid sb;
1069
1070         /* try to find bssid from scan dump results */
1071         res = nl80211_phy2ifname(ifname);
1072         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1073
1074         sb.ssid = NULL;
1075         sb.bssid[0] = 0;
1076
1077         if (req)
1078         {
1079                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
1080                 nl80211_free(req);
1081         }
1082
1083         /* failed, try to find mac from hostapd info */
1084         if ((sb.bssid[0] == 0) &&
1085             nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1086         {
1087                 sb.bssid[0] = 1;
1088                 sb.bssid[1] = strtol(&bssid[0],  NULL, 16);
1089                 sb.bssid[2] = strtol(&bssid[3],  NULL, 16);
1090                 sb.bssid[3] = strtol(&bssid[6],  NULL, 16);
1091                 sb.bssid[4] = strtol(&bssid[9],  NULL, 16);
1092                 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1093                 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1094         }
1095
1096         if (sb.bssid[0])
1097         {
1098                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1099                         sb.bssid[1], sb.bssid[2], sb.bssid[3],
1100                         sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1101
1102                 return 0;
1103         }
1104
1105         return -1;
1106 }
1107
1108
1109 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1110 {
1111         int *freq = arg;
1112         struct nlattr **attr = nl80211_parse(msg);
1113         struct nlattr *binfo[NL80211_BSS_MAX + 1];
1114
1115         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1116                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1117                 [NL80211_BSS_STATUS]    = { .type = NLA_U32 },
1118         };
1119
1120         if (attr[NL80211_ATTR_BSS] &&
1121             !nla_parse_nested(binfo, NL80211_BSS_MAX,
1122                               attr[NL80211_ATTR_BSS], bss_policy))
1123         {
1124                 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1125                         *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1126         }
1127
1128         return NL_SKIP;
1129 }
1130
1131 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1132 {
1133         int *freq = arg;
1134         struct nlattr **tb = nl80211_parse(msg);
1135
1136         if (tb[NL80211_ATTR_WIPHY_FREQ])
1137                 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1138
1139         return NL_SKIP;
1140 }
1141
1142 static int nl80211_get_frequency(const char *ifname, int *buf)
1143 {
1144         char *res, channel[4], hwmode[2];
1145         struct nl80211_msg_conveyor *req;
1146
1147         /* try to find frequency from interface info */
1148         res = nl80211_phy2ifname(ifname);
1149         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
1150         *buf = 0;
1151
1152         if (req)
1153         {
1154                 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
1155                 nl80211_free(req);
1156         }
1157
1158         /* failed, try to find frequency from hostapd info */
1159         if ((*buf == 0) &&
1160             nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1161                                           "channel", channel, sizeof(channel)) == 2)
1162         {
1163                 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1164         }
1165
1166         /* failed, try to find frequency from scan results */
1167         if (*buf == 0)
1168         {
1169                 res = nl80211_phy2ifname(ifname);
1170                 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1171
1172                 if (req)
1173                 {
1174                         nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1175                         nl80211_free(req);
1176                 }
1177         }
1178
1179         return (*buf == 0) ? -1 : 0;
1180 }
1181
1182 static int nl80211_get_channel(const char *ifname, int *buf)
1183 {
1184         if (!nl80211_get_frequency(ifname, buf))
1185         {
1186                 *buf = nl80211_freq2channel(*buf);
1187                 return 0;
1188         }
1189
1190         return -1;
1191 }
1192
1193 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1194 {
1195         int *buf = arg;
1196         struct nlattr **tb = nl80211_parse(msg);
1197
1198         if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1199                 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1200
1201         return NL_SKIP;
1202 }
1203
1204 static int nl80211_get_txpower(const char *ifname, int *buf)
1205 {
1206         char *res;
1207         struct nl80211_msg_conveyor *req;
1208
1209         res = nl80211_phy2ifname(ifname);
1210         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
1211
1212         if (req)
1213         {
1214                 *buf = 0;
1215                 nl80211_send(req, nl80211_get_txpower_cb, buf);
1216                 nl80211_free(req);
1217                 if (*buf)
1218                         return 0;
1219         }
1220
1221         return -1;
1222 }
1223
1224
1225 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1226 {
1227         int8_t dbm;
1228         int16_t mbit;
1229         struct nl80211_rssi_rate *rr = arg;
1230         struct nlattr **attr = nl80211_parse(msg);
1231         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1232         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1233
1234         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1235                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1236                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1237                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1238                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1239                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1240                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1241                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1242                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1243                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1244                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1245         };
1246
1247         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1248                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1249                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1250                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1251                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1252         };
1253
1254         if (attr[NL80211_ATTR_STA_INFO])
1255         {
1256                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1257                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1258                 {
1259                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1260                         {
1261                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1262                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1263                         }
1264
1265                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1266                         {
1267                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1268                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1269                                                       rate_policy))
1270                                 {
1271                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1272                                         {
1273                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1274                                                 rr->rate = rr->rate
1275                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1276                                         }
1277                                 }
1278                         }
1279                 }
1280         }
1281
1282         return NL_SKIP;
1283 }
1284
1285 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1286 {
1287         DIR *d;
1288         struct dirent *de;
1289         struct nl80211_msg_conveyor *req;
1290
1291         r->rssi = 0;
1292         r->rate = 0;
1293
1294         if ((d = opendir("/sys/class/net")) != NULL)
1295         {
1296                 while ((de = readdir(d)) != NULL)
1297                 {
1298                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1299                             (!de->d_name[strlen(ifname)] ||
1300                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1301                         {
1302                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1303                                                   NLM_F_DUMP);
1304
1305                                 if (req)
1306                                 {
1307                                         nl80211_send(req, nl80211_fill_signal_cb, r);
1308                                         nl80211_free(req);
1309                                 }
1310                         }
1311                 }
1312
1313                 closedir(d);
1314         }
1315 }
1316
1317 static int nl80211_get_bitrate(const char *ifname, int *buf)
1318 {
1319         struct nl80211_rssi_rate rr;
1320
1321         nl80211_fill_signal(ifname, &rr);
1322
1323         if (rr.rate)
1324         {
1325                 *buf = (rr.rate * 100);
1326                 return 0;
1327         }
1328
1329         return -1;
1330 }
1331
1332 static int nl80211_get_signal(const char *ifname, int *buf)
1333 {
1334         struct nl80211_rssi_rate rr;
1335
1336         nl80211_fill_signal(ifname, &rr);
1337
1338         if (rr.rssi)
1339         {
1340                 *buf = rr.rssi;
1341                 return 0;
1342         }
1343
1344         return -1;
1345 }
1346
1347 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1348 {
1349         int8_t *noise = arg;
1350         struct nlattr **tb = nl80211_parse(msg);
1351         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1352
1353         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1354                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1355                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1356         };
1357
1358         if (!tb[NL80211_ATTR_SURVEY_INFO])
1359                 return NL_SKIP;
1360
1361         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1362                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1363                 return NL_SKIP;
1364
1365         if (!si[NL80211_SURVEY_INFO_NOISE])
1366                 return NL_SKIP;
1367
1368         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1369                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1370
1371         return NL_SKIP;
1372 }
1373
1374
1375 static int nl80211_get_noise(const char *ifname, int *buf)
1376 {
1377         int8_t noise;
1378         struct nl80211_msg_conveyor *req;
1379
1380         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1381         if (req)
1382         {
1383                 noise = 0;
1384
1385                 nl80211_send(req, nl80211_get_noise_cb, &noise);
1386                 nl80211_free(req);
1387
1388                 if (noise)
1389                 {
1390                         *buf = noise;
1391                         return 0;
1392                 }
1393         }
1394
1395         return -1;
1396 }
1397
1398 static int nl80211_get_quality(const char *ifname, int *buf)
1399 {
1400         int signal;
1401
1402         if (!nl80211_get_signal(ifname, &signal))
1403         {
1404                 /* A positive signal level is usually just a quality
1405                  * value, pass through as-is */
1406                 if (signal >= 0)
1407                 {
1408                         *buf = signal;
1409                 }
1410
1411                 /* The cfg80211 wext compat layer assumes a signal range
1412                  * of -110 dBm to -40 dBm, the quality value is derived
1413                  * by adding 110 to the signal level */
1414                 else
1415                 {
1416                         if (signal < -110)
1417                                 signal = -110;
1418                         else if (signal > -40)
1419                                 signal = -40;
1420
1421                         *buf = (signal + 110);
1422                 }
1423
1424                 return 0;
1425         }
1426
1427         return -1;
1428 }
1429
1430 static int nl80211_get_quality_max(const char *ifname, int *buf)
1431 {
1432         /* The cfg80211 wext compat layer assumes a maximum
1433          * quality of 70 */
1434         *buf = 70;
1435
1436         return 0;
1437 }
1438
1439 static int nl80211_check_wepkey(const char *key)
1440 {
1441         if (key && *key)
1442         {
1443                 switch (strlen(key))
1444                 {
1445                 case 5:
1446                 case 10:
1447                         return IWINFO_CIPHER_WEP40;
1448
1449                 case 13:
1450                 case 26:
1451                         return IWINFO_CIPHER_WEP104;
1452                 }
1453         }
1454
1455         return 0;
1456 }
1457
1458 static int nl80211_get_encryption(const char *ifname, char *buf)
1459 {
1460         char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1461         char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1462
1463         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1464
1465         /* WPA supplicant */
1466         if (nl80211_wpactl_query(ifname,
1467                         "pairwise_cipher", wpa_pairwise,  sizeof(wpa_pairwise),
1468                         "group_cipher",    wpa_groupwise, sizeof(wpa_groupwise),
1469                         "key_mgmt",        wpa_key_mgmt,  sizeof(wpa_key_mgmt)))
1470         {
1471                 /* WEP */
1472                 if (!strcmp(wpa_key_mgmt, "NONE"))
1473                 {
1474                         if (strstr(wpa_pairwise, "WEP-40"))
1475                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1476                         else if (strstr(wpa_pairwise, "WEP-104"))
1477                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1478
1479                         if (strstr(wpa_groupwise, "WEP-40"))
1480                                 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1481                         else if (strstr(wpa_groupwise, "WEP-104"))
1482                                 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1483
1484                         c->enabled      = !!(c->pair_ciphers | c->group_ciphers);
1485                         c->auth_suites |= IWINFO_KMGMT_NONE;
1486                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1487                 }
1488
1489                 /* WPA */
1490                 else if (strstr(wpa_key_mgmt, "WPA"))
1491                 {
1492                         if (strstr(wpa_pairwise, "TKIP"))
1493                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1494                         else if (strstr(wpa_pairwise, "CCMP"))
1495                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1496                         else if (strstr(wpa_pairwise, "NONE"))
1497                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1498                         else if (strstr(wpa_pairwise, "WEP-40"))
1499                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1500                         else if (strstr(wpa_pairwise, "WEP-104"))
1501                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1502
1503                         if (strstr(wpa_groupwise, "TKIP"))
1504                                 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1505                         else if (strstr(wpa_groupwise, "CCMP"))
1506                                 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1507                         else if (strstr(wpa_groupwise, "NONE"))
1508                                 c->group_ciphers |= IWINFO_CIPHER_NONE;
1509                         else if (strstr(wpa_groupwise, "WEP-40"))
1510                                 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1511                         else if (strstr(wpa_groupwise, "WEP-104"))
1512                                 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1513
1514                         if (strstr(wpa_key_mgmt, "WPA2"))
1515                                 c->wpa_version = 2;
1516                         else if (strstr(wpa_key_mgmt, "WPA"))
1517                                 c->wpa_version = 1;
1518
1519                         if (strstr(wpa_key_mgmt, "PSK"))
1520                                 c->auth_suites |= IWINFO_KMGMT_PSK;
1521                         else if (strstr(wpa_key_mgmt, "EAP") ||
1522                                  strstr(wpa_key_mgmt, "802.1X"))
1523                                 c->auth_suites |= IWINFO_KMGMT_8021x;
1524                         else if (strstr(wpa_key_mgmt, "NONE"))
1525                                 c->auth_suites |= IWINFO_KMGMT_NONE;
1526
1527                         c->enabled = !!(c->wpa_version && c->auth_suites);
1528                 }
1529
1530                 return 0;
1531         }
1532
1533         /* Hostapd */
1534         else if (nl80211_hostapd_query(ifname,
1535                                 "wpa",          wpa,          sizeof(wpa),
1536                                 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1537                                 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1538                                 "auth_algs",    auth_algs,    sizeof(auth_algs),
1539                                 "wep_key0",     wep_key0,     sizeof(wep_key0),
1540                                 "wep_key1",     wep_key1,     sizeof(wep_key1),
1541                                 "wep_key2",     wep_key2,     sizeof(wep_key2),
1542                                 "wep_key3",     wep_key3,     sizeof(wep_key3)))
1543         {
1544                 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1545
1546                 if (wpa_key_mgmt[0])
1547                 {
1548                         if (strstr(wpa_key_mgmt, "PSK"))
1549                                 c->auth_suites |= IWINFO_KMGMT_PSK;
1550
1551                         if (strstr(wpa_key_mgmt, "EAP"))
1552                                 c->auth_suites |= IWINFO_KMGMT_8021x;
1553
1554                         if (strstr(wpa_key_mgmt, "NONE"))
1555                                 c->auth_suites |= IWINFO_KMGMT_NONE;
1556                 }
1557                 else
1558                 {
1559                         c->auth_suites |= IWINFO_KMGMT_PSK;
1560                 }
1561
1562                 if (wpa_pairwise[0])
1563                 {
1564                         if (strstr(wpa_pairwise, "TKIP"))
1565                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1566
1567                         if (strstr(wpa_pairwise, "CCMP"))
1568                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1569
1570                         if (strstr(wpa_pairwise, "NONE"))
1571                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1572                 }
1573
1574                 if (auth_algs[0])
1575                 {
1576                         switch(atoi(auth_algs))
1577                         {
1578                         case 1:
1579                                 c->auth_algs |= IWINFO_AUTH_OPEN;
1580                                 break;
1581
1582                         case 2:
1583                                 c->auth_algs |= IWINFO_AUTH_SHARED;
1584                                 break;
1585
1586                         case 3:
1587                                 c->auth_algs |= IWINFO_AUTH_OPEN;
1588                                 c->auth_algs |= IWINFO_AUTH_SHARED;
1589                                 break;
1590                         }
1591
1592                         c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1593                         c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1594                         c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1595                         c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1596                 }
1597
1598                 c->group_ciphers = c->pair_ciphers;
1599                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1600
1601                 return 0;
1602         }
1603
1604         return -1;
1605 }
1606
1607 static int nl80211_get_phyname(const char *ifname, char *buf)
1608 {
1609         const char *name;
1610
1611         name = nl80211_ifname2phy(ifname);
1612
1613         if (name)
1614         {
1615                 strcpy(buf, name);
1616                 return 0;
1617         }
1618         else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1619         {
1620                 name = nl80211_ifname2phy(name);
1621
1622                 if (name)
1623                 {
1624                         strcpy(buf, ifname);
1625                         return 0;
1626                 }
1627         }
1628
1629         return -1;
1630 }
1631
1632
1633 static void nl80211_parse_rateinfo(struct nlattr **ri,
1634                                    struct iwinfo_rate_entry *re)
1635 {
1636         if (ri[NL80211_RATE_INFO_BITRATE32])
1637                 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1638         else if (ri[NL80211_RATE_INFO_BITRATE])
1639                 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1640
1641         if (ri[NL80211_RATE_INFO_VHT_MCS])
1642         {
1643                 re->is_vht = 1;
1644                 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1645
1646                 if (ri[NL80211_RATE_INFO_VHT_NSS])
1647                         re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1648         }
1649         else if (ri[NL80211_RATE_INFO_MCS])
1650         {
1651                 re->is_ht = 1;
1652                 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1653         }
1654
1655         if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1656                 re->mhz = 5;
1657         else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1658                 re->mhz = 10;
1659         else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1660                 re->mhz = 40;
1661         else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1662                 re->mhz = 80;
1663         else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1664                  ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1665                 re->mhz = 160;
1666         else
1667                 re->mhz = 20;
1668
1669         if (ri[NL80211_RATE_INFO_SHORT_GI])
1670                 re->is_short_gi = 1;
1671
1672         re->is_40mhz = (re->mhz == 40);
1673 }
1674
1675 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1676 {
1677         struct nl80211_array_buf *arr = arg;
1678         struct iwinfo_assoclist_entry *e = arr->buf;
1679         struct nlattr **attr = nl80211_parse(msg);
1680         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1681         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1682         struct nl80211_sta_flag_update *sta_flags;
1683
1684         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1685                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1686                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1687                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1688                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1689                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1690                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1691                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1692                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1693                 [NL80211_STA_INFO_TX_RETRIES]    = { .type = NLA_U32    },
1694                 [NL80211_STA_INFO_TX_FAILED]     = { .type = NLA_U32    },
1695                 [NL80211_STA_INFO_T_OFFSET]      = { .type = NLA_U64    },
1696                 [NL80211_STA_INFO_STA_FLAGS] =
1697                         { .minlen = sizeof(struct nl80211_sta_flag_update) },
1698         };
1699
1700         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1701                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1702                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1703                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1704                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1705         };
1706
1707         /* advance to end of array */
1708         e += arr->count;
1709         memset(e, 0, sizeof(*e));
1710
1711         if (attr[NL80211_ATTR_MAC])
1712                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1713
1714         if (attr[NL80211_ATTR_STA_INFO] &&
1715             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1716                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1717         {
1718                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1719                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1720
1721                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1722                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1723
1724                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1725                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1726
1727                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1728                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1729
1730                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1731                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1732                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1733                         nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1734
1735                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1736                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1737                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1738                         nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1739
1740                 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1741                         e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1742
1743                 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1744                         e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1745
1746                 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1747                         e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1748
1749                 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1750                         e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1751
1752                 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1753                         e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1754
1755                 /* Station flags */
1756                 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1757                 {
1758                         sta_flags = (struct nl80211_sta_flag_update *)
1759                                 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1760
1761                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1762                             sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1763                                 e->is_authorized = 1;
1764
1765                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1766                             sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1767                                 e->is_authenticated = 1;
1768
1769                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1770                             sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1771                                 e->is_preamble_short = 1;
1772
1773                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1774                             sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1775                                 e->is_wme = 1;
1776
1777                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1778                             sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1779                                 e->is_mfp = 1;
1780
1781                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1782                             sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1783                                 e->is_tdls = 1;
1784                 }
1785         }
1786
1787         e->noise = 0; /* filled in by caller */
1788         arr->count++;
1789
1790         return NL_SKIP;
1791 }
1792
1793 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1794 {
1795         DIR *d;
1796         int i, noise = 0;
1797         struct dirent *de;
1798         struct nl80211_msg_conveyor *req;
1799         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1800         struct iwinfo_assoclist_entry *e;
1801
1802         if ((d = opendir("/sys/class/net")) != NULL)
1803         {
1804                 while ((de = readdir(d)) != NULL)
1805                 {
1806                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1807                             (!de->d_name[strlen(ifname)] ||
1808                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1809                         {
1810                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1811                                                   NLM_F_DUMP);
1812
1813                                 if (req)
1814                                 {
1815                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1816                                         nl80211_free(req);
1817                                 }
1818                         }
1819                 }
1820
1821                 closedir(d);
1822
1823                 if (!nl80211_get_noise(ifname, &noise))
1824                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1825                                 e->noise = noise;
1826
1827                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1828                 return 0;
1829         }
1830
1831         return -1;
1832 }
1833
1834 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1835 {
1836         int *dbm_max = arg;
1837         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1838
1839         struct nlattr **attr = nl80211_parse(msg);
1840         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1841         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1842         struct nlattr *band, *freq;
1843
1844         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1845                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1846                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1847                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1848                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1849                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1850                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1851         };
1852
1853         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1854         *dbm_max = -1;
1855
1856         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1857         {
1858                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1859                           nla_len(band), NULL);
1860
1861                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1862                 {
1863                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1864                                   nla_data(freq), nla_len(freq), freq_policy);
1865
1866                         ch_cmp = nl80211_freq2channel(nla_get_u32(
1867                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1868
1869                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
1870                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1871                         {
1872                                 *dbm_max = (int)(0.01 * nla_get_u32(
1873                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1874
1875                                 break;
1876                         }
1877                 }
1878         }
1879
1880         return NL_SKIP;
1881 }
1882
1883 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1884 {
1885         int ch_cur;
1886         int dbm_max = -1, dbm_cur, dbm_cnt;
1887         struct nl80211_msg_conveyor *req;
1888         struct iwinfo_txpwrlist_entry entry;
1889
1890         if (nl80211_get_channel(ifname, &ch_cur))
1891                 ch_cur = 0;
1892
1893         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1894         if (req)
1895         {
1896                 /* initialize the value pointer with channel for callback */
1897                 dbm_max = ch_cur;
1898
1899                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1900                 nl80211_free(req);
1901         }
1902
1903         if (dbm_max > 0)
1904         {
1905                 for (dbm_cur = 0, dbm_cnt = 0;
1906                      dbm_cur < dbm_max;
1907                      dbm_cur++, dbm_cnt++)
1908                 {
1909                         entry.dbm = dbm_cur;
1910                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1911
1912                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1913                 }
1914
1915                 entry.dbm = dbm_max;
1916                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1917
1918                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1919                 dbm_cnt++;
1920
1921                 *len = dbm_cnt * sizeof(entry);
1922                 return 0;
1923         }
1924
1925         return -1;
1926 }
1927
1928 static void nl80211_get_scancrypto(const char *spec,
1929         struct iwinfo_crypto_entry *c)
1930 {
1931         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1932         {
1933                 c->enabled = 1;
1934
1935                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1936                         c->wpa_version = 3;
1937
1938                 else if (strstr(spec, "WPA2"))
1939                         c->wpa_version = 2;
1940
1941                 else if (strstr(spec, "WPA"))
1942                         c->wpa_version = 1;
1943
1944                 else if (strstr(spec, "WEP"))
1945                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1946
1947
1948                 if (strstr(spec, "PSK"))
1949                         c->auth_suites |= IWINFO_KMGMT_PSK;
1950
1951                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1952                         c->auth_suites |= IWINFO_KMGMT_8021x;
1953
1954                 if (strstr(spec, "WPA-NONE"))
1955                         c->auth_suites |= IWINFO_KMGMT_NONE;
1956
1957
1958                 if (strstr(spec, "TKIP"))
1959                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1960
1961                 if (strstr(spec, "CCMP"))
1962                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1963
1964                 if (strstr(spec, "WEP-40"))
1965                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1966
1967                 if (strstr(spec, "WEP-104"))
1968                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1969
1970                 c->group_ciphers = c->pair_ciphers;
1971         }
1972         else
1973         {
1974                 c->enabled = 0;
1975         }
1976 }
1977
1978
1979 struct nl80211_scanlist {
1980         struct iwinfo_scanlist_entry *e;
1981         int len;
1982 };
1983
1984
1985 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1986                                     struct iwinfo_scanlist_entry *e)
1987 {
1988         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1989         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1990         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1991         int len;
1992
1993         while (ielen >= 2 && ielen >= ie[1])
1994         {
1995                 switch (ie[0])
1996                 {
1997                 case 0: /* SSID */
1998                         len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1999                         memcpy(e->ssid, ie + 2, len);
2000                         e->ssid[len] = 0;
2001                         break;
2002
2003                 case 48: /* RSN */
2004                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2005                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2006                         break;
2007
2008                 case 221: /* Vendor */
2009                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2010                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2011                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2012                         break;
2013                 }
2014
2015                 ielen -= ie[1] + 2;
2016                 ie += ie[1] + 2;
2017         }
2018 }
2019
2020 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2021 {
2022         int8_t rssi;
2023         uint16_t caps;
2024
2025         struct nl80211_scanlist *sl = arg;
2026         struct nlattr **tb = nl80211_parse(msg);
2027         struct nlattr *bss[NL80211_BSS_MAX + 1];
2028
2029         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2030                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
2031                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
2032                 [NL80211_BSS_BSSID]                = { 0 },
2033                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
2034                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
2035                 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2036                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
2037                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
2038                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
2039                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
2040                 [NL80211_BSS_BEACON_IES]           = { 0 },
2041         };
2042
2043         if (!tb[NL80211_ATTR_BSS] ||
2044                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2045                                  bss_policy) ||
2046                 !bss[NL80211_BSS_BSSID])
2047         {
2048                 return NL_SKIP;
2049         }
2050
2051         if (bss[NL80211_BSS_CAPABILITY])
2052                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2053         else
2054                 caps = 0;
2055
2056         memset(sl->e, 0, sizeof(*sl->e));
2057         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2058
2059         if (caps & (1<<1))
2060                 sl->e->mode = IWINFO_OPMODE_ADHOC;
2061         else if (caps & (1<<0))
2062                 sl->e->mode = IWINFO_OPMODE_MASTER;
2063         else
2064                 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2065
2066         if (caps & (1<<4))
2067                 sl->e->crypto.enabled = 1;
2068
2069         if (bss[NL80211_BSS_FREQUENCY])
2070                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2071                         bss[NL80211_BSS_FREQUENCY]));
2072
2073         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2074                 nl80211_get_scanlist_ie(bss, sl->e);
2075
2076         if (bss[NL80211_BSS_SIGNAL_MBM])
2077         {
2078                 sl->e->signal =
2079                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2080
2081                 rssi = sl->e->signal - 0x100;
2082
2083                 if (rssi < -110)
2084                         rssi = -110;
2085                 else if (rssi > -40)
2086                         rssi = -40;
2087
2088                 sl->e->quality = (rssi + 110);
2089                 sl->e->quality_max = 70;
2090         }
2091
2092         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2093         {
2094                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2095                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2096         }
2097
2098         sl->e++;
2099         sl->len++;
2100
2101         return NL_SKIP;
2102 }
2103
2104 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2105 {
2106         struct nl80211_msg_conveyor *req;
2107         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2108
2109         req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
2110         if (req)
2111         {
2112                 nl80211_send(req, NULL, NULL);
2113                 nl80211_free(req);
2114         }
2115
2116         nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
2117
2118         req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
2119         if (req)
2120         {
2121                 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
2122                 nl80211_free(req);
2123         }
2124
2125         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2126         return *len ? 0 : -1;
2127 }
2128
2129 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2130 {
2131 #define hex(x) \
2132         (((x) >= 'a') ? ((x) - 'a' + 10) : \
2133                 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2134
2135         int len = 0;
2136
2137         while (*in)
2138         {
2139                 if (len + 1 >= outlen)
2140                         break;
2141
2142                 switch (*in)
2143                 {
2144                 case '\\':
2145                         in++;
2146                         switch (*in)
2147                         {
2148                         case 'n':
2149                                 out[len++] = '\n'; in++;
2150                                 break;
2151
2152                         case 'r':
2153                                 out[len++] = '\r'; in++;
2154                                 break;
2155
2156                         case 't':
2157                                 out[len++] = '\t'; in++;
2158                                 break;
2159
2160                         case 'e':
2161                                 out[len++] = '\033'; in++;
2162                                 break;
2163
2164                         case 'x':
2165                                 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2166                                         out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2167                                 in += 3;
2168                                 break;
2169
2170                         default:
2171                                 out[len++] = *in++;
2172                                 break;
2173                         }
2174                         break;
2175
2176                 default:
2177                         out[len++] = *in++;
2178                         break;
2179                 }
2180         }
2181
2182         if (outlen > len)
2183                 out[len] = '\0';
2184
2185         return len;
2186 }
2187
2188 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2189 {
2190         int sock, qmax, rssi, tries, count = -1, ready = 0;
2191         char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2192         struct sockaddr_un local = { 0 };
2193         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2194
2195         sock = nl80211_wpactl_connect(ifname, &local);
2196
2197         if (sock < 0)
2198                 return sock;
2199
2200         send(sock, "ATTACH", 6, 0);
2201         send(sock, "SCAN", 4, 0);
2202
2203         /*
2204          * wait for scan results:
2205          *   nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2206          *   72 channels at most. We'll also receive two "OK" messages acknowledging
2207          *   the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2208          *   time to process the results, so try 72 + 2 + 1 times.
2209          */
2210         for (tries = 0; tries < 75; tries++)
2211         {
2212                 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2213                         continue;
2214
2215                 /* got an event notification */
2216                 if (reply[0] == '<')
2217                 {
2218                         /* scan results are ready */
2219                         if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2220                         {
2221                                 /* send "SCAN_RESULTS" command */
2222                                 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2223                                 break;
2224                         }
2225
2226                         /* is another unrelated event, retry */
2227                         tries--;
2228                 }
2229         }
2230
2231         /* receive and parse scan results if the wait above didn't time out */
2232         if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2233         {
2234                 nl80211_get_quality_max(ifname, &qmax);
2235
2236                 for (line = strtok_r(reply, "\n", &pos);
2237                      line != NULL;
2238                      line = strtok_r(NULL, "\n", &pos))
2239                 {
2240                         /* skip header line */
2241                         if (count < 0)
2242                         {
2243                                 count++;
2244                                 continue;
2245                         }
2246
2247                         bssid  = strtok(line, "\t");
2248                         freq   = strtok(NULL, "\t");
2249                         signal = strtok(NULL, "\t");
2250                         flags  = strtok(NULL, "\t");
2251                         ssid   = strtok(NULL, "\n");
2252
2253                         if (!bssid || !freq || !signal || !flags || !ssid)
2254                                 continue;
2255
2256                         /* BSSID */
2257                         e->mac[0] = strtol(&bssid[0],  NULL, 16);
2258                         e->mac[1] = strtol(&bssid[3],  NULL, 16);
2259                         e->mac[2] = strtol(&bssid[6],  NULL, 16);
2260                         e->mac[3] = strtol(&bssid[9],  NULL, 16);
2261                         e->mac[4] = strtol(&bssid[12], NULL, 16);
2262                         e->mac[5] = strtol(&bssid[15], NULL, 16);
2263
2264                         /* SSID */
2265                         wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2266
2267                         /* Mode */
2268                         if (strstr(flags, "[MESH]"))
2269                                 e->mode = IWINFO_OPMODE_MESHPOINT;
2270                         else if (strstr(flags, "[IBSS]"))
2271                                 e->mode = IWINFO_OPMODE_ADHOC;
2272                         else
2273                                 e->mode = IWINFO_OPMODE_MASTER;
2274
2275                         /* Channel */
2276                         e->channel = nl80211_freq2channel(atoi(freq));
2277
2278                         /* Signal */
2279                         rssi = atoi(signal);
2280                         e->signal = rssi;
2281
2282                         /* Quality */
2283                         if (rssi < 0)
2284                         {
2285                                 /* The cfg80211 wext compat layer assumes a signal range
2286                                  * of -110 dBm to -40 dBm, the quality value is derived
2287                                  * by adding 110 to the signal level */
2288                                 if (rssi < -110)
2289                                         rssi = -110;
2290                                 else if (rssi > -40)
2291                                         rssi = -40;
2292
2293                                 e->quality = (rssi + 110);
2294                         }
2295                         else
2296                         {
2297                                 e->quality = rssi;
2298                         }
2299
2300                         /* Max. Quality */
2301                         e->quality_max = qmax;
2302
2303                         /* Crypto */
2304                         nl80211_get_scancrypto(flags, &e->crypto);
2305
2306                         count++;
2307                         e++;
2308                 }
2309
2310                 *len = count * sizeof(struct iwinfo_scanlist_entry);
2311         }
2312
2313         close(sock);
2314         unlink(local.sun_path);
2315
2316         return (count >= 0) ? 0 : -1;
2317 }
2318
2319 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2320 {
2321         char *res;
2322         int rv, mode;
2323
2324         *len = 0;
2325
2326         /* Got a radioX pseudo interface, find some interface on it or create one */
2327         if (!strncmp(ifname, "radio", 5))
2328         {
2329                 /* Reuse existing interface */
2330                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2331                 {
2332                         return nl80211_get_scanlist(res, buf, len);
2333                 }
2334
2335                 /* Need to spawn a temporary iface for scanning */
2336                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2337                 {
2338                         rv = nl80211_get_scanlist(res, buf, len);
2339                         nl80211_ifdel(res);
2340                         return rv;
2341                 }
2342         }
2343
2344         /* WPA supplicant */
2345         if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2346         {
2347                 return 0;
2348         }
2349
2350         /* station / ad-hoc / monitor scan */
2351         else if (!nl80211_get_mode(ifname, &mode) &&
2352                  (mode == IWINFO_OPMODE_ADHOC ||
2353                   mode == IWINFO_OPMODE_MASTER ||
2354                   mode == IWINFO_OPMODE_CLIENT ||
2355                   mode == IWINFO_OPMODE_MONITOR) &&
2356                  iwinfo_ifup(ifname))
2357         {
2358                 return nl80211_get_scanlist_nl(ifname, buf, len);
2359         }
2360
2361         /* AP scan */
2362         else
2363         {
2364                 /* Got a temp interface, don't create yet another one */
2365                 if (!strncmp(ifname, "tmp.", 4))
2366                 {
2367                         if (!iwinfo_ifup(ifname))
2368                                 return -1;
2369
2370                         rv = nl80211_get_scanlist_nl(ifname, buf, len);
2371                         iwinfo_ifdown(ifname);
2372                         return rv;
2373                 }
2374
2375                 /* Spawn a new scan interface */
2376                 else
2377                 {
2378                         if (!(res = nl80211_ifadd(ifname)))
2379                                 return -1;
2380
2381                         iwinfo_ifmac(res);
2382
2383                         /* if we can take the new interface up, the driver supports an
2384                          * additional interface and there's no need to tear down the ap */
2385                         if (iwinfo_ifup(res))
2386                         {
2387                                 rv = nl80211_get_scanlist_nl(res, buf, len);
2388                                 iwinfo_ifdown(res);
2389                         }
2390
2391                         /* driver cannot create secondary interface, take down ap
2392                          * during scan */
2393                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2394                         {
2395                                 rv = nl80211_get_scanlist_nl(res, buf, len);
2396                                 iwinfo_ifdown(res);
2397                                 iwinfo_ifup(ifname);
2398                                 nl80211_hostapd_hup(ifname);
2399                         }
2400
2401                         nl80211_ifdel(res);
2402                         return rv;
2403                 }
2404         }
2405
2406         return -1;
2407 }
2408
2409 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2410 {
2411         int bands_remain, freqs_remain;
2412
2413         struct nl80211_array_buf *arr = arg;
2414         struct iwinfo_freqlist_entry *e = arr->buf;
2415
2416         struct nlattr **attr = nl80211_parse(msg);
2417         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2418         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2419         struct nlattr *band, *freq;
2420
2421         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2422         {
2423                 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2424                           nla_data(band), nla_len(band), NULL);
2425
2426                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2427                 {
2428                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2429                                   nla_data(freq), nla_len(freq), NULL);
2430
2431                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2432                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2433                                 continue;
2434
2435                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2436                         e->channel = nl80211_freq2channel(e->mhz);
2437
2438                         e->restricted = (
2439                                 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2440                                 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2441                         ) ? 1 : 0;
2442
2443                         e++;
2444                         arr->count++;
2445                 }
2446         }
2447
2448         return NL_SKIP;
2449 }
2450
2451 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2452 {
2453         struct nl80211_msg_conveyor *req;
2454         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2455
2456         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2457         if (req)
2458         {
2459                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2460                 nl80211_free(req);
2461         }
2462
2463         if (arr.count > 0)
2464         {
2465                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2466                 return 0;
2467         }
2468
2469         return -1;
2470 }
2471
2472 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2473 {
2474         char *buf = arg;
2475         struct nlattr **attr = nl80211_parse(msg);
2476
2477         if (attr[NL80211_ATTR_REG_ALPHA2])
2478                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2479         else
2480                 buf[0] = 0;
2481
2482         return NL_SKIP;
2483 }
2484
2485 static int nl80211_get_country(const char *ifname, char *buf)
2486 {
2487         int rv = -1;
2488         struct nl80211_msg_conveyor *req;
2489
2490         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2491         if (req)
2492         {
2493                 nl80211_send(req, nl80211_get_country_cb, buf);
2494                 nl80211_free(req);
2495
2496                 if (buf[0])
2497                         rv = 0;
2498         }
2499
2500         return rv;
2501 }
2502
2503 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2504 {
2505         int count;
2506         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2507         const struct iwinfo_iso3166_label *l;
2508
2509         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2510         {
2511                 e->iso3166 = l->iso3166;
2512                 e->ccode[0] = (l->iso3166 / 256);
2513                 e->ccode[1] = (l->iso3166 % 256);
2514                 e->ccode[2] = 0;
2515         }
2516
2517         *len = (count * sizeof(struct iwinfo_country_entry));
2518         return 0;
2519 }
2520
2521
2522 struct nl80211_modes
2523 {
2524         bool ok;
2525         uint32_t hw;
2526         uint32_t ht;
2527 };
2528
2529 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2530 {
2531         struct nl80211_modes *m = arg;
2532         int bands_remain, freqs_remain;
2533         uint16_t caps = 0;
2534         uint32_t vht_caps = 0;
2535         struct nlattr **attr = nl80211_parse(msg);
2536         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2537         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2538         struct nlattr *band, *freq;
2539
2540         if (attr[NL80211_ATTR_WIPHY_BANDS])
2541         {
2542                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2543                 {
2544                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2545                                   nla_data(band), nla_len(band), NULL);
2546
2547                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2548                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2549
2550                         /* Treat any nonzero capability as 11n */
2551                         if (caps > 0)
2552                         {
2553                                 m->hw |= IWINFO_80211_N;
2554                                 m->ht |= IWINFO_HTMODE_HT20;
2555
2556                                 if (caps & (1 << 1))
2557                                         m->ht |= IWINFO_HTMODE_HT40;
2558                         }
2559
2560                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2561                                             freqs_remain)
2562                         {
2563                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2564                                           nla_data(freq), nla_len(freq), NULL);
2565
2566                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2567                                         continue;
2568
2569                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2570                                 {
2571                                         m->hw |= IWINFO_80211_B;
2572                                         m->hw |= IWINFO_80211_G;
2573                                 }
2574                                 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2575                                 {
2576                                         vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2577
2578                                         /* Treat any nonzero capability as 11ac */
2579                                         if (vht_caps > 0)
2580                                         {
2581                                                 m->hw |= IWINFO_80211_AC;
2582                                                 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2583
2584                                                 switch ((vht_caps >> 2) & 3)
2585                                                 {
2586                                                 case 2:
2587                                                         m->ht |= IWINFO_HTMODE_VHT80_80;
2588                                                         /* fall through */
2589
2590                                                 case 1:
2591                                                         m->ht |= IWINFO_HTMODE_VHT160;
2592                                                 }
2593                                         }
2594                                 }
2595                                 else if (!(m->hw & IWINFO_80211_AC))
2596                                 {
2597                                         m->hw |= IWINFO_80211_A;
2598                                 }
2599                         }
2600                 }
2601
2602                 m->ok = 1;
2603         }
2604
2605         return NL_SKIP;
2606 }
2607
2608 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2609 {
2610         struct nl80211_msg_conveyor *req;
2611         struct nl80211_modes m = { 0 };
2612
2613         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2614         if (req)
2615         {
2616                 nl80211_send(req, nl80211_get_modelist_cb, &m);
2617                 nl80211_free(req);
2618         }
2619
2620         if (m.ok)
2621         {
2622                 *buf = m.hw;
2623                 return 0;
2624         }
2625
2626         return -1;
2627 }
2628
2629 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2630 {
2631         struct nl80211_msg_conveyor *req;
2632         struct nl80211_modes m = { 0 };
2633
2634         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2635         if (req)
2636         {
2637                 nl80211_send(req, nl80211_get_modelist_cb, &m);
2638                 nl80211_free(req);
2639         }
2640
2641         if (m.ok)
2642         {
2643                 *buf = m.ht;
2644                 return 0;
2645         }
2646
2647         return -1;
2648 }
2649
2650
2651 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2652 {
2653         struct nlattr **attr = nl80211_parse(msg);
2654         struct nlattr *comb;
2655         int *ret = arg;
2656         int comb_rem, limit_rem, mode_rem;
2657
2658         *ret = 0;
2659         if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2660                 return NL_SKIP;
2661
2662         nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2663         {
2664                 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2665                         [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2666                         [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2667                 };
2668                 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2669                 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2670                         [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2671                         [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2672                 };
2673                 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2674                 struct nlattr *limit;
2675
2676                 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2677
2678                 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2679                         continue;
2680
2681                 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2682                 {
2683                         struct nlattr *mode;
2684
2685                         nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2686
2687                         if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2688                             !tb_limit[NL80211_IFACE_LIMIT_MAX])
2689                                 continue;
2690
2691                         if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2692                                 continue;
2693
2694                         nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2695                                 if (nla_type(mode) == NL80211_IFTYPE_AP)
2696                                         *ret = 1;
2697                         }
2698                 }
2699         }
2700
2701         return NL_SKIP;
2702 }
2703
2704 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2705 {
2706         struct nl80211_msg_conveyor *req;
2707
2708         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2709         if (!req)
2710                 return -1;
2711
2712         nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2713         nl80211_free(req);
2714         return 0;
2715 }
2716
2717 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2718 {
2719         int rv = -1;
2720         char *res;
2721
2722         /* Got a radioX pseudo interface, find some interface on it or create one */
2723         if (!strncmp(ifname, "radio", 5))
2724         {
2725                 /* Reuse existing interface */
2726                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2727                 {
2728                         rv = wext_ops.hardware_id(res, buf);
2729                 }
2730
2731                 /* Need to spawn a temporary iface for finding IDs */
2732                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2733                 {
2734                         rv = wext_ops.hardware_id(res, buf);
2735                         nl80211_ifdel(res);
2736                 }
2737         }
2738         else
2739         {
2740                 rv = wext_ops.hardware_id(ifname, buf);
2741         }
2742
2743         /* Failed to obtain hardware IDs, search board config */
2744         if (rv)
2745         {
2746                 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2747         }
2748
2749         return rv;
2750 }
2751
2752 static const struct iwinfo_hardware_entry *
2753 nl80211_get_hardware_entry(const char *ifname)
2754 {
2755         struct iwinfo_hardware_id id;
2756
2757         if (nl80211_get_hardware_id(ifname, (char *)&id))
2758                 return NULL;
2759
2760         return iwinfo_hardware(&id);
2761 }
2762
2763 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2764 {
2765         const struct iwinfo_hardware_entry *hw;
2766
2767         if (!(hw = nl80211_get_hardware_entry(ifname)))
2768                 sprintf(buf, "Generic MAC80211");
2769         else
2770                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2771
2772         return 0;
2773 }
2774
2775 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2776 {
2777         const struct iwinfo_hardware_entry *hw;
2778
2779         if (!(hw = nl80211_get_hardware_entry(ifname)))
2780                 return -1;
2781
2782         *buf = hw->txpower_offset;
2783         return 0;
2784 }
2785
2786 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2787 {
2788         const struct iwinfo_hardware_entry *hw;
2789
2790         if (!(hw = nl80211_get_hardware_entry(ifname)))
2791                 return -1;
2792
2793         *buf = hw->frequency_offset;
2794         return 0;
2795 }
2796
2797 static int nl80211_lookup_phyname(const char *section, char *buf)
2798 {
2799         int idx;
2800
2801         if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2802                 return -1;
2803
2804         sprintf(buf, "phy%d", idx);
2805         return 0;
2806 }
2807
2808 const struct iwinfo_ops nl80211_ops = {
2809         .name             = "nl80211",
2810         .probe            = nl80211_probe,
2811         .channel          = nl80211_get_channel,
2812         .frequency        = nl80211_get_frequency,
2813         .frequency_offset = nl80211_get_frequency_offset,
2814         .txpower          = nl80211_get_txpower,
2815         .txpower_offset   = nl80211_get_txpower_offset,
2816         .bitrate          = nl80211_get_bitrate,
2817         .signal           = nl80211_get_signal,
2818         .noise            = nl80211_get_noise,
2819         .quality          = nl80211_get_quality,
2820         .quality_max      = nl80211_get_quality_max,
2821         .mbssid_support   = nl80211_get_mbssid_support,
2822         .hwmodelist       = nl80211_get_hwmodelist,
2823         .htmodelist       = nl80211_get_htmodelist,
2824         .mode             = nl80211_get_mode,
2825         .ssid             = nl80211_get_ssid,
2826         .bssid            = nl80211_get_bssid,
2827         .country          = nl80211_get_country,
2828         .hardware_id      = nl80211_get_hardware_id,
2829         .hardware_name    = nl80211_get_hardware_name,
2830         .encryption       = nl80211_get_encryption,
2831         .phyname          = nl80211_get_phyname,
2832         .assoclist        = nl80211_get_assoclist,
2833         .txpwrlist        = nl80211_get_txpwrlist,
2834         .scanlist         = nl80211_get_scanlist,
2835         .freqlist         = nl80211_get_freqlist,
2836         .countrylist      = nl80211_get_countrylist,
2837         .lookup_phy       = nl80211_lookup_phyname,
2838         .close            = nl80211_close
2839 };