package/network/utils/iwinfo/src/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 "iwinfo/nl80211.h"
  26 #include "iwinfo/wext.h"
  27
  28 #define min(x, y) ((x) < (y)) ? (x) : (y)
  29
  30 static struct nl80211_state *nls = NULL;
  31
  32 static int nl80211_init(void)
  33 {
  34         int err, fd;
  35
  36         if (!nls)
  37         {
  38                 nls = malloc(sizeof(struct nl80211_state));
  39                 if (!nls) {
  40                         err = -ENOMEM;
  41                         goto err;
  42                 }
  43
  44                 memset(nls, 0, sizeof(*nls));
  45
  46                 nls->nl_sock = nl_socket_alloc();
  47                 if (!nls->nl_sock) {
  48                         err = -ENOMEM;
  49                         goto err;
  50                 }
  51
  52                 if (genl_connect(nls->nl_sock)) {
  53                         err = -ENOLINK;
  54                         goto err;
  55                 }
  56
  57                 fd = nl_socket_get_fd(nls->nl_sock);
  58                 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
  59                         err = -EINVAL;
  60                         goto err;
  61                 }
  62
  63                 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
  64                         err = -ENOMEM;
  65                         goto err;
  66                 }
  67
  68                 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
  69                 if (!nls->nl80211) {
  70                         err = -ENOENT;
  71                         goto err;
  72                 }
  73
  74                 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
  75                 if (!nls->nlctrl) {
  76                         err = -ENOENT;
  77                         goto err;
  78                 }
  79         }
  80
  81         return 0;
  82
  83
  84 err:
  85         nl80211_close();
  86         return err;
  87 }
  88
  89
  90 static int nl80211_msg_error(struct sockaddr_nl *nla,
  91         struct nlmsgerr *err, void *arg)
  92 {
  93         int *ret = arg;
  94         *ret = err->error;
  95         return NL_STOP;
  96 }
  97
  98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
  99 {
 100         int *ret = arg;
 101         *ret = 0;
 102         return NL_SKIP;
 103 }
 104
 105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
 106 {
 107         int *ret = arg;
 108         *ret = 0;
 109         return NL_STOP;
 110 }
 111
 112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
 113 {
 114         return NL_SKIP;
 115 }
 116
 117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
 118 {
 119         if (cv)
 120         {
 121                 if (cv->cb)
 122                         nl_cb_put(cv->cb);
 123
 124                 if (cv->msg)
 125                         nlmsg_free(cv->msg);
 126
 127                 cv->cb  = NULL;
 128                 cv->msg = NULL;
 129         }
 130 }
 131
 132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
 133                                                  int cmd, int flags)
 134 {
 135         static struct nl80211_msg_conveyor cv;
 136
 137         struct nl_msg *req = NULL;
 138         struct nl_cb *cb = NULL;
 139
 140         req = nlmsg_alloc();
 141         if (!req)
 142                 goto err;
 143
 144         cb = nl_cb_alloc(NL_CB_DEFAULT);
 145         if (!cb)
 146                 goto err;
 147
 148         genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
 149
 150         cv.msg = req;
 151         cv.cb  = cb;
 152
 153         return &cv;
 154
 155 err:
 156 nla_put_failure:
 157         if (cb)
 158                 nl_cb_put(cb);
 159
 160         if (req)
 161                 nlmsg_free(req);
 162
 163         return NULL;
 164 }
 165
 166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
 167 {
 168         if (nl80211_init() < 0)
 169                 return NULL;
 170
 171         return nl80211_new(nls->nlctrl, cmd, flags);
 172 }
 173
 174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
 175                                                  int cmd, int flags)
 176 {
 177         int ifidx = -1, phyidx = -1;
 178         struct nl80211_msg_conveyor *cv;
 179
 180         if (nl80211_init() < 0)
 181                 return NULL;
 182
 183         if (!strncmp(ifname, "phy", 3))
 184                 phyidx = atoi(&ifname[3]);
 185         else if (!strncmp(ifname, "radio", 5))
 186                 phyidx = atoi(&ifname[5]);
 187         else if (!strncmp(ifname, "mon.", 4))
 188                 ifidx = if_nametoindex(&ifname[4]);
 189         else
 190                 ifidx = if_nametoindex(ifname);
 191
 192         if ((ifidx < 0) && (phyidx < 0))
 193                 return NULL;
 194
 195         cv = nl80211_new(nls->nl80211, cmd, flags);
 196         if (!cv)
 197                 return NULL;
 198
 199         if (ifidx > -1)
 200                 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
 201
 202         if (phyidx > -1)
 203                 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
 204
 205         return cv;
 206
 207 nla_put_failure:
 208         nl80211_free(cv);
 209         return NULL;
 210 }
 211
 212 static struct nl80211_msg_conveyor * nl80211_send(
 213         struct nl80211_msg_conveyor *cv,
 214         int (*cb_func)(struct nl_msg *, void *), void *cb_arg
 215 ) {
 216         static struct nl80211_msg_conveyor rcv;
 217         int err = 1;
 218
 219         if (cb_func)
 220                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
 221         else
 222                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
 223
 224         if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
 225                 goto err;
 226
 227         nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
 228         nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
 229         nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
 230
 231         while (err > 0)
 232                 nl_recvmsgs(nls->nl_sock, cv->cb);
 233
 234         return &rcv;
 235
 236 err:
 237         nl_cb_put(cv->cb);
 238         nlmsg_free(cv->msg);
 239
 240         return NULL;
 241 }
 242
 243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
 244 {
 245         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 246         static struct nlattr *attr[NL80211_ATTR_MAX + 1];
 247
 248         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 249                   genlmsg_attrlen(gnlh, 0), NULL);
 250
 251         return attr;
 252 }
 253
 254
 255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
 256 {
 257         struct nl80211_group_conveyor *cv = arg;
 258
 259         struct nlattr **attr = nl80211_parse(msg);
 260         struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
 261         struct nlattr *mgrp;
 262         int mgrpidx;
 263
 264         if (!attr[CTRL_ATTR_MCAST_GROUPS])
 265                 return NL_SKIP;
 266
 267         nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
 268         {
 269                 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
 270                           nla_data(mgrp), nla_len(mgrp), NULL);
 271
 272                 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
 273                     mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
 274                     !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
 275                              cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
 276                 {
 277                         cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
 278                         break;
 279                 }
 280         }
 281
 282         return NL_SKIP;
 283 }
 284
 285 static int nl80211_subscribe(const char *family, const char *group)
 286 {
 287         struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
 288         struct nl80211_msg_conveyor *req;
 289
 290         req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
 291         if (req)
 292         {
 293                 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
 294                 nl80211_send(req, nl80211_subscribe_cb, &cv);
 295
 296 nla_put_failure:
 297                 nl80211_free(req);
 298         }
 299
 300         return nl_socket_add_membership(nls->nl_sock, cv.id);
 301 }
 302
 303
 304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
 305 {
 306         struct nl80211_event_conveyor *cv = arg;
 307         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 308
 309         if (gnlh->cmd == cv->wait)
 310                 cv->recv = gnlh->cmd;
 311
 312         return NL_SKIP;
 313 }
 314
 315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
 316 {
 317         return NL_OK;
 318 }
 319
 320 static int nl80211_wait(const char *family, const char *group, int cmd)
 321 {
 322         struct nl80211_event_conveyor cv = { .wait = cmd };
 323         struct nl_cb *cb;
 324
 325         if (nl80211_subscribe(family, group))
 326                 return -ENOENT;
 327
 328         cb = nl_cb_alloc(NL_CB_DEFAULT);
 329
 330         if (!cb)
 331                 return -ENOMEM;
 332
 333         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
 334         nl_cb_set(cb, NL_CB_VALID,     NL_CB_CUSTOM, nl80211_wait_cb,        &cv );
 335
 336         while (!cv.recv)
 337                 nl_recvmsgs(nls->nl_sock, cb);
 338
 339         nl_cb_put(cb);
 340
 341         return 0;
 342 }
 343
 344
 345 static int nl80211_freq2channel(int freq)
 346 {
 347         if (freq == 2484)
 348                 return 14;
 349
 350         if (freq < 2484)
 351                 return (freq - 2407) / 5;
 352
 353         return (freq / 5) - 1000;
 354 }
 355
 356 static int nl80211_channel2freq(int channel, const char *band)
 357 {
 358         if (channel == 14)
 359                 return 2484;
 360
 361         if ((channel < 14) && (!band || band[0] != 'a'))
 362                 return (channel * 5) + 2407;
 363
 364         if (channel > 0)
 365                 return (1000 + channel) * 5;
 366
 367         return 0;
 368 }
 369
 370 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
 371 {
 372         int i, len;
 373         char lkey[64] = { 0 };
 374         const char *ln = buf;
 375         static char lval[256] = { 0 };
 376
 377         int matched_if = ifname ? 0 : 1;
 378
 379
 380         for( i = 0, len = strlen(buf); i < len; i++ )
 381         {
 382                 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
 383                 {
 384                         ln++;
 385                 }
 386                 else if (!lkey[0] && (buf[i] == '='))
 387                 {
 388                         if ((&buf[i] - ln) > 0)
 389                                 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
 390                 }
 391                 else if (buf[i] == '\n')
 392                 {
 393                         if (lkey[0])
 394                         {
 395                                 memcpy(lval, ln + strlen(lkey) + 1,
 396                                         min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
 397
 398                                 if ((ifname != NULL) &&
 399                                     (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
 400                                 {
 401                                         matched_if = !strcmp(lval, ifname);
 402                                 }
 403                                 else if (matched_if && !strcmp(lkey, key))
 404                                 {
 405                                         return lval;
 406                                 }
 407                         }
 408
 409                         ln = &buf[i+1];
 410                         memset(lkey, 0, sizeof(lkey));
 411                         memset(lval, 0, sizeof(lval));
 412                 }
 413         }
 414
 415         return NULL;
 416 }
 417
 418 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
 419 {
 420         char *buf = arg;
 421         struct nlattr **attr = nl80211_parse(msg);
 422
 423         if (attr[NL80211_ATTR_WIPHY_NAME])
 424                 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
 425                        nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
 426         else
 427                 buf[0] = 0;
 428
 429         return NL_SKIP;
 430 }
 431
 432 static char * nl80211_ifname2phy(const char *ifname)
 433 {
 434         static char phy[32] = { 0 };
 435         struct nl80211_msg_conveyor *req;
 436
 437         memset(phy, 0, sizeof(phy));
 438
 439         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
 440         if (req)
 441         {
 442                 nl80211_send(req, nl80211_ifname2phy_cb, phy);
 443                 nl80211_free(req);
 444         }
 445
 446         return phy[0] ? phy : NULL;
 447 }
 448
 449 static char * nl80211_hostapd_info(const char *ifname)
 450 {
 451         int mode;
 452         char *phy;
 453         char path[32] = { 0 };
 454         static char buf[4096] = { 0 };
 455         FILE *conf;
 456
 457         if (nl80211_get_mode(ifname, &mode))
 458                 return NULL;
 459
 460         if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
 461             (phy = nl80211_ifname2phy(ifname)) != NULL)
 462         {
 463                 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
 464
 465                 if ((conf = fopen(path, "r")) != NULL)
 466                 {
 467                         fread(buf, sizeof(buf) - 1, 1, conf);
 468                         fclose(conf);
 469
 470                         return buf;
 471                 }
 472         }
 473
 474         return NULL;
 475 }
 476
 477 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
 478 {
 479         fd_set rfds;
 480         struct timeval tv = { 2, 0 };
 481
 482         FD_ZERO(&rfds);
 483         FD_SET(sock, &rfds);
 484
 485         memset(buf, 0, blen);
 486
 487
 488         if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
 489                 return -1;
 490
 491         if (!FD_ISSET(sock, &rfds))
 492                 return -1;
 493
 494         return recv(sock, buf, blen, 0);
 495 }
 496
 497 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
 498                                                                    const char *event)
 499 {
 500         int numtry = 0;
 501         int sock = -1;
 502         char *rv = NULL;
 503         size_t remote_length, local_length;
 504         static char buffer[10240] = { 0 };
 505
 506         struct sockaddr_un local = { 0 };
 507         struct sockaddr_un remote = { 0 };
 508
 509
 510         sock = socket(PF_UNIX, SOCK_DGRAM, 0);
 511         if (sock < 0)
 512                 return NULL;
 513
 514         remote.sun_family = AF_UNIX;
 515         remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
 516                 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
 517
 518         if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
 519                 goto out;
 520
 521         if (connect(sock, (struct sockaddr *) &remote, remote_length))
 522                 goto out;
 523
 524         local.sun_family = AF_UNIX;
 525         local_length = sizeof(local.sun_family) +
 526                 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
 527
 528         if (bind(sock, (struct sockaddr *) &local, local_length))
 529                 goto out;
 530
 531
 532         if (event)
 533         {
 534                 send(sock, "ATTACH", 6, 0);
 535
 536                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
 537                         goto out;
 538         }
 539
 540
 541         send(sock, cmd, strlen(cmd), 0);
 542
 543         while( numtry++ < 5 )
 544         {
 545                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
 546                 {
 547                         if (event)
 548                                 continue;
 549
 550                         break;
 551                 }
 552
 553                 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
 554                         break;
 555         }
 556
 557         rv = buffer;
 558
 559 out:
 560         close(sock);
 561
 562         if (local.sun_family)
 563                 unlink(local.sun_path);
 564
 565         return rv;
 566 }
 567
 568 static inline int nl80211_readint(const char *path)
 569 {
 570         int fd;
 571         int rv = -1;
 572         char buffer[16];
 573
 574         if ((fd = open(path, O_RDONLY)) > -1)
 575         {
 576                 if (read(fd, buffer, sizeof(buffer)) > 0)
 577                         rv = atoi(buffer);
 578
 579                 close(fd);
 580         }
 581
 582         return rv;
 583 }
 584
 585 static char * nl80211_phy2ifname(const char *ifname)
 586 {
 587         int fd, ifidx = -1, cifidx = -1, phyidx = -1;
 588         char buffer[64];
 589         static char nif[IFNAMSIZ] = { 0 };
 590
 591         DIR *d;
 592         struct dirent *e;
 593
 594         if (!ifname)
 595                 return NULL;
 596         else if (!strncmp(ifname, "phy", 3))
 597                 phyidx = atoi(&ifname[3]);
 598         else if (!strncmp(ifname, "radio", 5))
 599                 phyidx = atoi(&ifname[5]);
 600
 601         memset(nif, 0, sizeof(nif));
 602
 603         if (phyidx > -1)
 604         {
 605                 if ((d = opendir("/sys/class/net")) != NULL)
 606                 {
 607                         while ((e = readdir(d)) != NULL)
 608                         {
 609                                 snprintf(buffer, sizeof(buffer),
 610                                          "/sys/class/net/%s/phy80211/index", e->d_name);
 611
 612                                 if (nl80211_readint(buffer) == phyidx)
 613                                 {
 614                                         snprintf(buffer, sizeof(buffer),
 615                                                  "/sys/class/net/%s/ifindex", e->d_name);
 616
 617                                         if ((cifidx = nl80211_readint(buffer)) >= 0 &&
 618                                             ((ifidx < 0) || (cifidx < ifidx)))
 619                                         {
 620                                                 ifidx = cifidx;
 621                                                 strncpy(nif, e->d_name, sizeof(nif));
 622                                         }
 623                                 }
 624                         }
 625
 626                         closedir(d);
 627                 }
 628         }
 629
 630         return nif[0] ? nif : NULL;
 631 }
 632
 633 static char * nl80211_ifadd(const char *ifname)
 634 {
 635         int phyidx;
 636         char *rv = NULL;
 637         static char nif[IFNAMSIZ] = { 0 };
 638         struct nl80211_msg_conveyor *req, *res;
 639
 640         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 641         if (req)
 642         {
 643                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 644
 645                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 646                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 647
 648                 nl80211_send(req, NULL, NULL);
 649
 650                 rv = nif;
 651
 652         nla_put_failure:
 653                 nl80211_free(req);
 654         }
 655
 656         return rv;
 657 }
 658
 659 static void nl80211_ifdel(const char *ifname)
 660 {
 661         struct nl80211_msg_conveyor *req;
 662
 663         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 664         if (req)
 665         {
 666                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 667
 668                 nl80211_send(req, NULL, NULL);
 669
 670         nla_put_failure:
 671                 nl80211_free(req);
 672         }
 673 }
 674
 675 static void nl80211_hostapd_hup(const char *ifname)
 676 {
 677         int fd, pid = 0;
 678         char buf[32];
 679         char *phy = nl80211_ifname2phy(ifname);
 680
 681         if (phy)
 682         {
 683                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 684                 if ((fd = open(buf, O_RDONLY)) > 0)
 685                 {
 686                         if (read(fd, buf, sizeof(buf)) > 0)
 687                                 pid = atoi(buf);
 688
 689                         close(fd);
 690                 }
 691
 692                 if (pid > 0)
 693                         kill(pid, 1);
 694         }
 695 }
 696
 697
 698 int nl80211_probe(const char *ifname)
 699 {
 700         return !!nl80211_ifname2phy(ifname);
 701 }
 702
 703 void nl80211_close(void)
 704 {
 705         if (nls)
 706         {
 707                 if (nls->nlctrl)
 708                         genl_family_put(nls->nlctrl);
 709
 710                 if (nls->nl80211)
 711                         genl_family_put(nls->nl80211);
 712
 713                 if (nls->nl_sock)
 714                         nl_socket_free(nls->nl_sock);
 715
 716                 if (nls->nl_cache)
 717                         nl_cache_free(nls->nl_cache);
 718
 719                 free(nls);
 720                 nls = NULL;
 721         }
 722 }
 723
 724
 725 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
 726 {
 727         int *mode = arg;
 728         struct nlattr **tb = nl80211_parse(msg);
 729         const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
 730                 IWINFO_OPMODE_UNKNOWN,          /* unspecified */
 731                 IWINFO_OPMODE_ADHOC,            /* IBSS */
 732                 IWINFO_OPMODE_CLIENT,           /* managed */
 733                 IWINFO_OPMODE_MASTER,           /* AP */
 734                 IWINFO_OPMODE_AP_VLAN,          /* AP/VLAN */
 735                 IWINFO_OPMODE_WDS,                      /* WDS */
 736                 IWINFO_OPMODE_MONITOR,          /* monitor */
 737                 IWINFO_OPMODE_MESHPOINT,        /* mesh point */
 738                 IWINFO_OPMODE_P2P_CLIENT,       /* P2P-client */
 739                 IWINFO_OPMODE_P2P_GO,           /* P2P-GO */
 740         };
 741
 742         if (tb[NL80211_ATTR_IFTYPE])
 743                 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
 744
 745         return NL_SKIP;
 746 }
 747
 748 int nl80211_get_mode(const char *ifname, int *buf)
 749 {
 750         char *res;
 751         struct nl80211_msg_conveyor *req;
 752
 753         res = nl80211_phy2ifname(ifname);
 754         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 755         *buf = IWINFO_OPMODE_UNKNOWN;
 756
 757         if (req)
 758         {
 759                 nl80211_send(req, nl80211_get_mode_cb, buf);
 760                 nl80211_free(req);
 761         }
 762
 763         return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
 764 }
 765
 766
 767 struct nl80211_ssid_bssid {
 768         unsigned char *ssid;
 769         unsigned char bssid[7];
 770 };
 771
 772 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
 773 {
 774         int ielen;
 775         unsigned char *ie;
 776         struct nl80211_ssid_bssid *sb = arg;
 777         struct nlattr **tb = nl80211_parse(msg);
 778         struct nlattr *bss[NL80211_BSS_MAX + 1];
 779
 780         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 781                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
 782                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
 783         };
 784
 785         if (!tb[NL80211_ATTR_BSS] ||
 786             nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
 787                              bss_policy) ||
 788             !bss[NL80211_BSS_BSSID] ||
 789             !bss[NL80211_BSS_STATUS] ||
 790             !bss[NL80211_BSS_INFORMATION_ELEMENTS])
 791         {
 792                 return NL_SKIP;
 793         }
 794
 795         switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
 796         {
 797         case NL80211_BSS_STATUS_ASSOCIATED:
 798         case NL80211_BSS_STATUS_AUTHENTICATED:
 799         case NL80211_BSS_STATUS_IBSS_JOINED:
 800
 801                 if (sb->ssid)
 802                 {
 803                         ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
 804                         ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
 805
 806                         while (ielen >= 2 && ielen >= ie[1])
 807                         {
 808                                 if (ie[0] == 0)
 809                                 {
 810                                         memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
 811                                         return NL_SKIP;
 812                                 }
 813
 814                                 ielen -= ie[1] + 2;
 815                                 ie += ie[1] + 2;
 816                         }
 817                 }
 818                 else
 819                 {
 820                         sb->bssid[0] = 1;
 821                         memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
 822                         return NL_SKIP;
 823                 }
 824
 825         default:
 826                 return NL_SKIP;
 827         }
 828 }
 829
 830 int nl80211_get_ssid(const char *ifname, char *buf)
 831 {
 832         char *res;
 833         struct nl80211_msg_conveyor *req;
 834         struct nl80211_ssid_bssid sb;
 835
 836         /* try to find ssid from scan dump results */
 837         res = nl80211_phy2ifname(ifname);
 838         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
 839
 840         sb.ssid = buf;
 841         *buf = 0;
 842
 843         if (req)
 844         {
 845                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
 846                 nl80211_free(req);
 847         }
 848
 849         /* failed, try to find from hostapd info */
 850         if ((*buf == 0) &&
 851             (res = nl80211_hostapd_info(ifname)) &&
 852             (res = nl80211_getval(ifname, res, "ssid")))
 853         {
 854                 memcpy(buf, res, strlen(res));
 855         }
 856
 857         return (*buf == 0) ? -1 : 0;
 858 }
 859
 860 int nl80211_get_bssid(const char *ifname, char *buf)
 861 {
 862         char *res;
 863         struct nl80211_msg_conveyor *req;
 864         struct nl80211_ssid_bssid sb;
 865
 866         /* try to find bssid from scan dump results */
 867         res = nl80211_phy2ifname(ifname);
 868         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
 869
 870         sb.ssid = NULL;
 871         sb.bssid[0] = 0;
 872
 873         if (req)
 874         {
 875                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
 876                 nl80211_free(req);
 877         }
 878
 879         /* failed, try to find mac from hostapd info */
 880         if ((sb.bssid[0] == 0) &&
 881             (res = nl80211_hostapd_info(ifname)) &&
 882             (res = nl80211_getval(ifname, res, "bssid")))
 883         {
 884                 sb.bssid[0] = 1;
 885                 sb.bssid[1] = strtol(&res[0],  NULL, 16);
 886                 sb.bssid[2] = strtol(&res[3],  NULL, 16);
 887                 sb.bssid[3] = strtol(&res[6],  NULL, 16);
 888                 sb.bssid[4] = strtol(&res[9],  NULL, 16);
 889                 sb.bssid[5] = strtol(&res[12], NULL, 16);
 890                 sb.bssid[6] = strtol(&res[15], NULL, 16);
 891         }
 892
 893         if (sb.bssid[0])
 894         {
 895                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 896                         sb.bssid[1], sb.bssid[2], sb.bssid[3],
 897                         sb.bssid[4], sb.bssid[5], sb.bssid[6]);
 898
 899                 return 0;
 900         }
 901
 902         return -1;
 903 }
 904
 905
 906 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
 907 {
 908         int *freq = arg;
 909         struct nlattr **attr = nl80211_parse(msg);
 910         struct nlattr *binfo[NL80211_BSS_MAX + 1];
 911
 912         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 913                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
 914         };
 915
 916         if (attr[NL80211_ATTR_BSS] &&
 917             !nla_parse_nested(binfo, NL80211_BSS_MAX,
 918                               attr[NL80211_ATTR_BSS], bss_policy))
 919         {
 920                 if (binfo[NL80211_BSS_FREQUENCY])
 921                         *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
 922         }
 923
 924         return NL_SKIP;
 925 }
 926
 927 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
 928 {
 929         int *freq = arg;
 930         struct nlattr **tb = nl80211_parse(msg);
 931
 932         if (tb[NL80211_ATTR_WIPHY_FREQ])
 933                 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 934
 935         return NL_SKIP;
 936 }
 937
 938 int nl80211_get_frequency(const char *ifname, int *buf)
 939 {
 940         char *res, *channel;
 941         struct nl80211_msg_conveyor *req;
 942
 943         /* try to find frequency from interface info */
 944         res = nl80211_phy2ifname(ifname);
 945         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 946         *buf = 0;
 947
 948         if (req)
 949         {
 950                 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
 951                 nl80211_free(req);
 952         }
 953
 954         /* failed, try to find frequency from hostapd info */
 955         if ((*buf == 0) &&
 956             (res = nl80211_hostapd_info(ifname)) &&
 957             (channel = nl80211_getval(NULL, res, "channel")))
 958         {
 959                 *buf = nl80211_channel2freq(atoi(channel),
 960                                             nl80211_getval(NULL, res, "hw_mode"));
 961         }
 962         else
 963         {
 964                 /* failed, try to find frequency from scan results */
 965                 if (*buf == 0)
 966                 {
 967                         res = nl80211_phy2ifname(ifname);
 968                         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
 969                                           NLM_F_DUMP);
 970
 971                         if (req)
 972                         {
 973                                 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
 974                                 nl80211_free(req);
 975                         }
 976                 }
 977         }
 978
 979         return (*buf == 0) ? -1 : 0;
 980 }
 981
 982 int nl80211_get_channel(const char *ifname, int *buf)
 983 {
 984         if (!nl80211_get_frequency(ifname, buf))
 985         {
 986                 *buf = nl80211_freq2channel(*buf);
 987                 return 0;
 988         }
 989
 990         return -1;
 991 }
 992
 993
 994 int nl80211_get_txpower(const char *ifname, int *buf)
 995 {
 996         char *res;
 997         char path[PATH_MAX];
 998
 999         res = nl80211_ifname2phy(ifname);
1000         snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1001                  res ? res : ifname);
1002
1003         if ((*buf = nl80211_readint(path)) > -1)
1004                 return 0;
1005
1006         return wext_get_txpower(ifname, buf);
1007 }
1008
1009
1010 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1011 {
1012         int8_t dbm;
1013         int16_t mbit;
1014         struct nl80211_rssi_rate *rr = arg;
1015         struct nlattr **attr = nl80211_parse(msg);
1016         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1017         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1018
1019         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1020                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1021                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1022                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1023                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1024                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1025                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1026                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1027                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1028                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1029                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1030         };
1031
1032         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1033                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1034                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1035                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1036                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1037         };
1038
1039         if (attr[NL80211_ATTR_STA_INFO])
1040         {
1041                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1042                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1043                 {
1044                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1045                         {
1046                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1047                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1048                         }
1049
1050                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1051                         {
1052                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1053                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1054                                                       rate_policy))
1055                                 {
1056                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1057                                         {
1058                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1059                                                 rr->rate = rr->rate
1060                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1061                                         }
1062                                 }
1063                         }
1064                 }
1065         }
1066
1067         return NL_SKIP;
1068 }
1069
1070 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1071 {
1072         DIR *d;
1073         struct dirent *de;
1074         struct nl80211_msg_conveyor *req;
1075
1076         r->rssi = 0;
1077         r->rate = 0;
1078
1079         if ((d = opendir("/sys/class/net")) != NULL)
1080         {
1081                 while ((de = readdir(d)) != NULL)
1082                 {
1083                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1084                             (!de->d_name[strlen(ifname)] ||
1085                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1086                         {
1087                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1088                                                   NLM_F_DUMP);
1089
1090                                 if (req)
1091                                 {
1092                                         nl80211_send(req, nl80211_fill_signal_cb, r);
1093                                         nl80211_free(req);
1094                                 }
1095                         }
1096                 }
1097
1098                 closedir(d);
1099         }
1100 }
1101
1102 int nl80211_get_bitrate(const char *ifname, int *buf)
1103 {
1104         struct nl80211_rssi_rate rr;
1105
1106         nl80211_fill_signal(ifname, &rr);
1107
1108         if (rr.rate)
1109         {
1110                 *buf = (rr.rate * 100);
1111                 return 0;
1112         }
1113
1114         return -1;
1115 }
1116
1117 int nl80211_get_signal(const char *ifname, int *buf)
1118 {
1119         struct nl80211_rssi_rate rr;
1120
1121         nl80211_fill_signal(ifname, &rr);
1122
1123         if (rr.rssi)
1124         {
1125                 *buf = rr.rssi;
1126                 return 0;
1127         }
1128
1129         return -1;
1130 }
1131
1132 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1133 {
1134         int8_t *noise = arg;
1135         struct nlattr **tb = nl80211_parse(msg);
1136         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1137
1138         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1139                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1140                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1141         };
1142
1143         if (!tb[NL80211_ATTR_SURVEY_INFO])
1144                 return NL_SKIP;
1145
1146         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1147                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1148                 return NL_SKIP;
1149
1150         if (!si[NL80211_SURVEY_INFO_NOISE])
1151                 return NL_SKIP;
1152
1153         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1154                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1155
1156         return NL_SKIP;
1157 }
1158
1159
1160 int nl80211_get_noise(const char *ifname, int *buf)
1161 {
1162         int8_t noise;
1163         struct nl80211_msg_conveyor *req;
1164
1165         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1166         if (req)
1167         {
1168                 noise = 0;
1169
1170                 nl80211_send(req, nl80211_get_noise_cb, &noise);
1171                 nl80211_free(req);
1172
1173                 if (noise)
1174                 {
1175                         *buf = noise;
1176                         return 0;
1177                 }
1178         }
1179
1180         return -1;
1181 }
1182
1183 int nl80211_get_quality(const char *ifname, int *buf)
1184 {
1185         int signal;
1186
1187         if (!nl80211_get_signal(ifname, &signal))
1188         {
1189                 /* A positive signal level is usually just a quality
1190                  * value, pass through as-is */
1191                 if (signal >= 0)
1192                 {
1193                         *buf = signal;
1194                 }
1195
1196                 /* The cfg80211 wext compat layer assumes a signal range
1197                  * of -110 dBm to -40 dBm, the quality value is derived
1198                  * by adding 110 to the signal level */
1199                 else
1200                 {
1201                         if (signal < -110)
1202                                 signal = -110;
1203                         else if (signal > -40)
1204                                 signal = -40;
1205
1206                         *buf = (signal + 110);
1207                 }
1208
1209                 return 0;
1210         }
1211
1212         return -1;
1213 }
1214
1215 int nl80211_get_quality_max(const char *ifname, int *buf)
1216 {
1217         /* The cfg80211 wext compat layer assumes a maximum
1218          * quality of 70 */
1219         *buf = 70;
1220
1221         return 0;
1222 }
1223
1224 int nl80211_get_encryption(const char *ifname, char *buf)
1225 {
1226         int i;
1227         char k[9];
1228         char *val, *res;
1229         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1230
1231         /* WPA supplicant */
1232         if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1233             (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1234         {
1235                 /* WEP */
1236                 if (strstr(val, "WEP"))
1237                 {
1238                         if (strstr(val, "WEP-40"))
1239                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1240
1241                         else if (strstr(val, "WEP-104"))
1242                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1243
1244                         c->enabled       = 1;
1245                         c->group_ciphers = c->pair_ciphers;
1246
1247                         c->auth_suites |= IWINFO_KMGMT_NONE;
1248                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1249                 }
1250
1251                 /* WPA */
1252                 else
1253                 {
1254                         if (strstr(val, "TKIP"))
1255                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1256
1257                         else if (strstr(val, "CCMP"))
1258                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1259
1260                         else if (strstr(val, "NONE"))
1261                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1262
1263                         else if (strstr(val, "WEP-40"))
1264                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1265
1266                         else if (strstr(val, "WEP-104"))
1267                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1268
1269
1270                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
1271                         {
1272                                 if (strstr(val, "TKIP"))
1273                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
1274
1275                                 else if (strstr(val, "CCMP"))
1276                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
1277
1278                                 else if (strstr(val, "NONE"))
1279                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
1280
1281                                 else if (strstr(val, "WEP-40"))
1282                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
1283
1284                                 else if (strstr(val, "WEP-104"))
1285                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
1286                         }
1287
1288
1289                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1290                         {
1291                                 if (strstr(val, "WPA2"))
1292                                         c->wpa_version = 2;
1293
1294                                 else if (strstr(val, "WPA"))
1295                                         c->wpa_version = 1;
1296
1297
1298                                 if (strstr(val, "PSK"))
1299                                         c->auth_suites |= IWINFO_KMGMT_PSK;
1300
1301                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1302                                         c->auth_suites |= IWINFO_KMGMT_8021x;
1303
1304                                 else if (strstr(val, "NONE"))
1305                                         c->auth_suites |= IWINFO_KMGMT_NONE;
1306                         }
1307
1308                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1309                 }
1310
1311                 return 0;
1312         }
1313
1314         /* Hostapd */
1315         else if ((res = nl80211_hostapd_info(ifname)))
1316         {
1317                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1318                         c->wpa_version = atoi(val);
1319
1320                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1321
1322                 if (!val || strstr(val, "PSK"))
1323                         c->auth_suites |= IWINFO_KMGMT_PSK;
1324
1325                 if (val && strstr(val, "EAP"))
1326                         c->auth_suites |= IWINFO_KMGMT_8021x;
1327
1328                 if (val && strstr(val, "NONE"))
1329                         c->auth_suites |= IWINFO_KMGMT_NONE;
1330
1331                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1332                 {
1333                         if (strstr(val, "TKIP"))
1334                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1335
1336                         if (strstr(val, "CCMP"))
1337                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1338
1339                         if (strstr(val, "NONE"))
1340                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1341                 }
1342
1343                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1344                 {
1345                         switch(atoi(val)) {
1346                                 case 1:
1347                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1348                                         break;
1349
1350                                 case 2:
1351                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1352                                         break;
1353
1354                                 case 3:
1355                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1356                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1357                                         break;
1358
1359                                 default:
1360                                         break;
1361                         }
1362
1363                         for (i = 0; i < 4; i++)
1364                         {
1365                                 snprintf(k, sizeof(k), "wep_key%d", i);
1366
1367                                 if ((val = nl80211_getval(ifname, res, k)))
1368                                 {
1369                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1370                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1371
1372                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1373                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1374                                 }
1375                         }
1376                 }
1377
1378                 c->group_ciphers = c->pair_ciphers;
1379                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1380
1381                 return 0;
1382         }
1383
1384         return -1;
1385 }
1386
1387
1388 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1389 {
1390         struct nl80211_array_buf *arr = arg;
1391         struct iwinfo_assoclist_entry *e = arr->buf;
1392         struct nlattr **attr = nl80211_parse(msg);
1393         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1394         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1395
1396         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1397                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1398                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1399                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1400                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1401                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1402                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1403         };
1404
1405         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1406                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1407                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1408                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1409                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1410         };
1411
1412         /* advance to end of array */
1413         e += arr->count;
1414         memset(e, 0, sizeof(*e));
1415
1416         if (attr[NL80211_ATTR_MAC])
1417                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1418
1419         if (attr[NL80211_ATTR_STA_INFO] &&
1420             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1421                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1422         {
1423                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1424                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1425
1426                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1427                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1428
1429                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1430                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1431
1432                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1433                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1434
1435                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1436                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1437                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1438                 {
1439                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1440                                 e->rx_rate.rate =
1441                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1442
1443                         if (rinfo[NL80211_RATE_INFO_MCS])
1444                                 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1445
1446                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1447                                 e->rx_rate.is_40mhz = 1;
1448
1449                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1450                                 e->rx_rate.is_short_gi = 1;
1451                 }
1452
1453                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1454                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1455                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1456                 {
1457                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1458                                 e->tx_rate.rate =
1459                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1460
1461                         if (rinfo[NL80211_RATE_INFO_MCS])
1462                                 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1463
1464                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1465                                 e->tx_rate.is_40mhz = 1;
1466
1467                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1468                                 e->tx_rate.is_short_gi = 1;
1469                 }
1470         }
1471
1472         e->noise = 0; /* filled in by caller */
1473         arr->count++;
1474
1475         return NL_SKIP;
1476 }
1477
1478 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1479 {
1480         DIR *d;
1481         int i, noise = 0;
1482         struct dirent *de;
1483         struct nl80211_msg_conveyor *req;
1484         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1485         struct iwinfo_assoclist_entry *e;
1486
1487         if ((d = opendir("/sys/class/net")) != NULL)
1488         {
1489                 while ((de = readdir(d)) != NULL)
1490                 {
1491                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1492                             (!de->d_name[strlen(ifname)] ||
1493                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1494                         {
1495                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1496                                                   NLM_F_DUMP);
1497
1498                                 if (req)
1499                                 {
1500                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1501                                         nl80211_free(req);
1502                                 }
1503                         }
1504                 }
1505
1506                 closedir(d);
1507
1508                 if (!nl80211_get_noise(ifname, &noise))
1509                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1510                                 e->noise = noise;
1511
1512                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1513                 return 0;
1514         }
1515
1516         return -1;
1517 }
1518
1519 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1520 {
1521         int *dbm_max = arg;
1522         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1523
1524         struct nlattr **attr = nl80211_parse(msg);
1525         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1526         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1527         struct nlattr *band, *freq;
1528
1529         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1530                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1531                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1532                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1533                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1534                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1535                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1536         };
1537
1538         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1539         *dbm_max = -1;
1540
1541         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1542         {
1543                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1544                           nla_len(band), NULL);
1545
1546                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1547                 {
1548                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1549                                   nla_data(freq), nla_len(freq), freq_policy);
1550
1551                         ch_cmp = nl80211_freq2channel(nla_get_u32(
1552                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1553
1554                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
1555                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1556                         {
1557                                 *dbm_max = (int)(0.01 * nla_get_u32(
1558                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1559
1560                                 break;
1561                         }
1562                 }
1563         }
1564
1565         return NL_SKIP;
1566 }
1567
1568 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1569 {
1570         int ch_cur;
1571         int dbm_max = -1, dbm_cur, dbm_cnt;
1572         struct nl80211_msg_conveyor *req;
1573         struct iwinfo_txpwrlist_entry entry;
1574
1575         if (nl80211_get_channel(ifname, &ch_cur))
1576                 ch_cur = 0;
1577
1578         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1579         if (req)
1580         {
1581                 /* initialize the value pointer with channel for callback */
1582                 dbm_max = ch_cur;
1583
1584                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1585                 nl80211_free(req);
1586         }
1587
1588         if (dbm_max > 0)
1589         {
1590                 for (dbm_cur = 0, dbm_cnt = 0;
1591                      dbm_cur < dbm_max;
1592                      dbm_cur++, dbm_cnt++)
1593                 {
1594                         entry.dbm = dbm_cur;
1595                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1596
1597                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1598                 }
1599
1600                 entry.dbm = dbm_max;
1601                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1602
1603                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1604                 dbm_cnt++;
1605
1606                 *len = dbm_cnt * sizeof(entry);
1607                 return 0;
1608         }
1609
1610         return -1;
1611 }
1612
1613 static void nl80211_get_scancrypto(const char *spec,
1614         struct iwinfo_crypto_entry *c)
1615 {
1616         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1617         {
1618                 c->enabled = 1;
1619
1620                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1621                         c->wpa_version = 3;
1622
1623                 else if (strstr(spec, "WPA2"))
1624                         c->wpa_version = 2;
1625
1626                 else if (strstr(spec, "WPA"))
1627                         c->wpa_version = 1;
1628
1629                 else if (strstr(spec, "WEP"))
1630                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1631
1632
1633                 if (strstr(spec, "PSK"))
1634                         c->auth_suites |= IWINFO_KMGMT_PSK;
1635
1636                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1637                         c->auth_suites |= IWINFO_KMGMT_8021x;
1638
1639                 if (strstr(spec, "WPA-NONE"))
1640                         c->auth_suites |= IWINFO_KMGMT_NONE;
1641
1642
1643                 if (strstr(spec, "TKIP"))
1644                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1645
1646                 if (strstr(spec, "CCMP"))
1647                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1648
1649                 if (strstr(spec, "WEP-40"))
1650                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1651
1652                 if (strstr(spec, "WEP-104"))
1653                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1654
1655                 c->group_ciphers = c->pair_ciphers;
1656         }
1657         else
1658         {
1659                 c->enabled = 0;
1660         }
1661 }
1662
1663
1664 struct nl80211_scanlist {
1665         struct iwinfo_scanlist_entry *e;
1666         int len;
1667 };
1668
1669
1670 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1671                                     struct iwinfo_scanlist_entry *e)
1672 {
1673         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1674         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1675         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1676
1677         while (ielen >= 2 && ielen >= ie[1])
1678         {
1679                 switch (ie[0])
1680                 {
1681                 case 0: /* SSID */
1682                         memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1683                         break;
1684
1685                 case 48: /* RSN */
1686                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1687                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1688                         break;
1689
1690                 case 221: /* Vendor */
1691                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1692                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1693                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1694                         break;
1695                 }
1696
1697                 ielen -= ie[1] + 2;
1698                 ie += ie[1] + 2;
1699         }
1700 }
1701
1702 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1703 {
1704         int8_t rssi;
1705         uint16_t caps;
1706
1707         struct nl80211_scanlist *sl = arg;
1708         struct nlattr **tb = nl80211_parse(msg);
1709         struct nlattr *bss[NL80211_BSS_MAX + 1];
1710
1711         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1712                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
1713                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
1714                 [NL80211_BSS_BSSID]                = {                 },
1715                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
1716                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
1717                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
1718                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
1719                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
1720                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
1721                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
1722                 [NL80211_BSS_BEACON_IES]           = {                 },
1723         };
1724
1725         if (!tb[NL80211_ATTR_BSS] ||
1726                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1727                                  bss_policy) ||
1728                 !bss[NL80211_BSS_BSSID])
1729         {
1730                 return NL_SKIP;
1731         }
1732
1733         if (bss[NL80211_BSS_CAPABILITY])
1734                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1735         else
1736                 caps = 0;
1737
1738         memset(sl->e, 0, sizeof(*sl->e));
1739         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1740
1741         if (caps & (1<<1))
1742                 sl->e->mode = IWINFO_OPMODE_ADHOC;
1743         else
1744                 sl->e->mode = IWINFO_OPMODE_MASTER;
1745
1746         if (caps & (1<<4))
1747                 sl->e->crypto.enabled = 1;
1748
1749         if (bss[NL80211_BSS_FREQUENCY])
1750                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1751                         bss[NL80211_BSS_FREQUENCY]));
1752
1753         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1754                 nl80211_get_scanlist_ie(bss, sl->e);
1755
1756         if (bss[NL80211_BSS_SIGNAL_MBM])
1757         {
1758                 sl->e->signal =
1759                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1760
1761                 rssi = sl->e->signal - 0x100;
1762
1763                 if (rssi < -110)
1764                         rssi = -110;
1765                 else if (rssi > -40)
1766                         rssi = -40;
1767
1768                 sl->e->quality = (rssi + 110);
1769                 sl->e->quality_max = 70;
1770         }
1771
1772         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1773         {
1774                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1775                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1776         }
1777
1778         sl->e++;
1779         sl->len++;
1780
1781         return NL_SKIP;
1782 }
1783
1784 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1785 {
1786         struct nl80211_msg_conveyor *req;
1787         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1788
1789         req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1790         if (req)
1791         {
1792                 nl80211_send(req, NULL, NULL);
1793                 nl80211_free(req);
1794         }
1795
1796         nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1797
1798         req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1799         if (req)
1800         {
1801                 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1802                 nl80211_free(req);
1803         }
1804
1805         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1806         return *len ? 0 : -1;
1807 }
1808
1809 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1810 {
1811         int freq, rssi, qmax, count;
1812         char *res;
1813         char ssid[128] = { 0 };
1814         char bssid[18] = { 0 };
1815         char cipher[256] = { 0 };
1816
1817         /* Got a radioX pseudo interface, find some interface on it or create one */
1818         if (!strncmp(ifname, "radio", 5))
1819         {
1820                 /* Reuse existing interface */
1821                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1822                 {
1823                         return nl80211_get_scanlist(res, buf, len);
1824                 }
1825
1826                 /* Need to spawn a temporary iface for scanning */
1827                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1828                 {
1829                         count = nl80211_get_scanlist(res, buf, len);
1830                         nl80211_ifdel(res);
1831                         return count;
1832                 }
1833         }
1834
1835         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1836
1837         /* WPA supplicant */
1838         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1839         {
1840                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1841                 {
1842                         nl80211_get_quality_max(ifname, &qmax);
1843
1844                         /* skip header line */
1845                         while (*res++ != '\n');
1846
1847                         count = 0;
1848
1849                         while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1850                                       bssid, &freq, &rssi, cipher, ssid) > 0)
1851                         {
1852                                 /* BSSID */
1853                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1854                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1855                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1856                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1857                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1858                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1859
1860                                 /* SSID */
1861                                 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1862
1863                                 /* Mode (assume master) */
1864                                 e->mode = IWINFO_OPMODE_MASTER;
1865
1866                                 /* Channel */
1867                                 e->channel = nl80211_freq2channel(freq);
1868
1869                                 /* Signal */
1870                                 e->signal = rssi;
1871
1872                                 /* Quality */
1873                                 if (rssi < 0)
1874                                 {
1875                                         /* The cfg80211 wext compat layer assumes a signal range
1876                                          * of -110 dBm to -40 dBm, the quality value is derived
1877                                          * by adding 110 to the signal level */
1878                                         if (rssi < -110)
1879                                                 rssi = -110;
1880                                         else if (rssi > -40)
1881                                                 rssi = -40;
1882
1883                                         e->quality = (rssi + 110);
1884                                 }
1885                                 else
1886                                 {
1887                                         e->quality = rssi;
1888                                 }
1889
1890                                 /* Max. Quality */
1891                                 e->quality_max = qmax;
1892
1893                                 /* Crypto */
1894                                 nl80211_get_scancrypto(cipher, &e->crypto);
1895
1896                                 /* advance to next line */
1897                                 while (*res && *res++ != '\n');
1898
1899                                 count++;
1900                                 e++;
1901
1902                                 memset(ssid, 0, sizeof(ssid));
1903                                 memset(bssid, 0, sizeof(bssid));
1904                                 memset(cipher, 0, sizeof(cipher));
1905                         }
1906
1907                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1908                         return 0;
1909                 }
1910         }
1911
1912         /* AP scan */
1913         else
1914         {
1915                 /* Got a temp interface, don't create yet another one */
1916                 if (!strncmp(ifname, "tmp.", 4))
1917                 {
1918                         if (!iwinfo_ifup(ifname))
1919                                 return -1;
1920
1921                         nl80211_get_scanlist_nl(ifname, buf, len);
1922                         iwinfo_ifdown(ifname);
1923                         return 0;
1924                 }
1925
1926                 /* Spawn a new scan interface */
1927                 else
1928                 {
1929                         if (!(res = nl80211_ifadd(ifname)))
1930                                 goto out;
1931
1932                         if (!iwinfo_ifmac(res))
1933                                 goto out;
1934
1935                         /* if we can take the new interface up, the driver supports an
1936                          * additional interface and there's no need to tear down the ap */
1937                         if (iwinfo_ifup(res))
1938                         {
1939                                 nl80211_get_scanlist_nl(res, buf, len);
1940                                 iwinfo_ifdown(res);
1941                         }
1942
1943                         /* driver cannot create secondary interface, take down ap
1944                          * during scan */
1945                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1946                         {
1947                                 nl80211_get_scanlist_nl(res, buf, len);
1948                                 iwinfo_ifdown(res);
1949                                 iwinfo_ifup(ifname);
1950                                 nl80211_hostapd_hup(ifname);
1951                         }
1952
1953                 out:
1954                         nl80211_ifdel(res);
1955                         return 0;
1956                 }
1957         }
1958
1959         return -1;
1960 }
1961
1962 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1963 {
1964         int bands_remain, freqs_remain;
1965
1966         struct nl80211_array_buf *arr = arg;
1967         struct iwinfo_freqlist_entry *e = arr->buf;
1968
1969         struct nlattr **attr = nl80211_parse(msg);
1970         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1971         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1972         struct nlattr *band, *freq;
1973
1974         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1975                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1976                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1977                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1978                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1979                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1980                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1981         };
1982
1983         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1984         {
1985                 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1986                           nla_data(band), nla_len(band), NULL);
1987
1988                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1989                 {
1990                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1991                                   nla_data(freq), nla_len(freq), NULL);
1992
1993                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1994                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
1995                                 continue;
1996
1997                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1998                         e->channel = nl80211_freq2channel(e->mhz);
1999
2000                         e->restricted = (
2001                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2002                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
2003                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2004                         ) ? 1 : 0;
2005
2006                         e++;
2007                         arr->count++;
2008                 }
2009         }
2010
2011         return NL_SKIP;
2012 }
2013
2014 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2015 {
2016         struct nl80211_msg_conveyor *req;
2017         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2018
2019         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2020         if (req)
2021         {
2022                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2023                 nl80211_free(req);
2024         }
2025
2026         if (arr.count > 0)
2027         {
2028                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2029                 return 0;
2030         }
2031
2032         return -1;
2033 }
2034
2035 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2036 {
2037         char *buf = arg;
2038         struct nlattr **attr = nl80211_parse(msg);
2039
2040         if (attr[NL80211_ATTR_REG_ALPHA2])
2041                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2042         else
2043                 buf[0] = 0;
2044
2045         return NL_SKIP;
2046 }
2047
2048 int nl80211_get_country(const char *ifname, char *buf)
2049 {
2050         int rv = -1;
2051         struct nl80211_msg_conveyor *req;
2052
2053         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2054         if (req)
2055         {
2056                 nl80211_send(req, nl80211_get_country_cb, buf);
2057                 nl80211_free(req);
2058
2059                 if (buf[0])
2060                         rv = 0;
2061         }
2062
2063         return rv;
2064 }
2065
2066 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2067 {
2068         int i, count;
2069         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2070         const struct iwinfo_iso3166_label *l;
2071
2072         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2073         {
2074                 e->iso3166 = l->iso3166;
2075                 e->ccode[0] = (l->iso3166 / 256);
2076                 e->ccode[1] = (l->iso3166 % 256);
2077         }
2078
2079         *len = (count * sizeof(struct iwinfo_country_entry));
2080         return 0;
2081 }
2082
2083 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2084 {
2085         int *modes = arg;
2086         int bands_remain, freqs_remain;
2087         uint16_t caps = 0;
2088         struct nlattr **attr = nl80211_parse(msg);
2089         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2090         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2091         struct nlattr *band, *freq;
2092
2093         *modes = 0;
2094
2095         if (attr[NL80211_ATTR_WIPHY_BANDS])
2096         {
2097                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2098                 {
2099                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2100                                   nla_data(band), nla_len(band), NULL);
2101
2102                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2103                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2104
2105                         /* Treat any nonzero capability as 11n */
2106                         if (caps > 0)
2107                                 *modes |= IWINFO_80211_N;
2108
2109                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2110                                             freqs_remain)
2111                         {
2112                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2113                                           nla_data(freq), nla_len(freq), NULL);
2114
2115                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2116                                         continue;
2117
2118                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2119                                 {
2120                                         *modes |= IWINFO_80211_B;
2121                                         *modes |= IWINFO_80211_G;
2122                                 }
2123                                 else
2124                                 {
2125                                         *modes |= IWINFO_80211_A;
2126                                 }
2127                         }
2128                 }
2129         }
2130
2131         return NL_SKIP;
2132 }
2133
2134 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2135 {
2136         struct nl80211_msg_conveyor *req;
2137
2138         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2139         if (req)
2140         {
2141                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2142                 nl80211_free(req);
2143         }
2144
2145         return *buf ? 0 : -1;
2146 }
2147
2148 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2149 {
2150         /* Test whether we can create another interface */
2151         char *nif = nl80211_ifadd(ifname);
2152
2153         if (nif)
2154         {
2155                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2156
2157                 iwinfo_ifdown(nif);
2158                 nl80211_ifdel(nif);
2159
2160                 return 0;
2161         }
2162
2163         return -1;
2164 }
2165
2166 int nl80211_get_hardware_id(const char *ifname, char *buf)
2167 {
2168         int rv;
2169         char *res;
2170
2171         /* Got a radioX pseudo interface, find some interface on it or create one */
2172         if (!strncmp(ifname, "radio", 5))
2173         {
2174                 /* Reuse existing interface */
2175                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2176                 {
2177                         rv = wext_get_hardware_id(res, buf);
2178                 }
2179
2180                 /* Need to spawn a temporary iface for finding IDs */
2181                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2182                 {
2183                         rv = wext_get_hardware_id(res, buf);
2184                         nl80211_ifdel(res);
2185                 }
2186         }
2187         else
2188         {
2189                 rv = wext_get_hardware_id(ifname, buf);
2190         }
2191
2192         /* Failed to obtain hardware IDs, search board config */
2193         if (rv)
2194         {
2195                 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2196         }
2197
2198         return rv;
2199 }
2200
2201 static const struct iwinfo_hardware_entry *
2202 nl80211_get_hardware_entry(const char *ifname)
2203 {
2204         struct iwinfo_hardware_id id;
2205
2206         if (nl80211_get_hardware_id(ifname, (char *)&id))
2207                 return NULL;
2208
2209         return iwinfo_hardware(&id);
2210 }
2211
2212 int nl80211_get_hardware_name(const char *ifname, char *buf)
2213 {
2214         const struct iwinfo_hardware_entry *hw;
2215
2216         if (!(hw = nl80211_get_hardware_entry(ifname)))
2217                 sprintf(buf, "Generic MAC80211");
2218         else
2219                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2220
2221         return 0;
2222 }
2223
2224 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2225 {
2226         const struct iwinfo_hardware_entry *hw;
2227
2228         if (!(hw = nl80211_get_hardware_entry(ifname)))
2229                 return -1;
2230
2231         *buf = hw->txpower_offset;
2232         return 0;
2233 }
2234
2235 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2236 {
2237         const struct iwinfo_hardware_entry *hw;
2238
2239         if (!(hw = nl80211_get_hardware_entry(ifname)))
2240                 return -1;
2241
2242         *buf = hw->frequency_offset;
2243         return 0;
2244 }