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         else if (freq < 2484)
 350                 return (freq - 2407) / 5;
 351         else if (freq >= 4910 && freq <= 4980)
 352                 return (freq - 4000) / 5;
 353         else
 354                 return (freq - 5000) / 5;
 355 }
 356
 357 static int nl80211_channel2freq(int channel, const char *band)
 358 {
 359         if (!band || band[0] != 'a')
 360         {
 361                 if (channel == 14)
 362                         return 2484;
 363                 else if (channel < 14)
 364                         return (channel * 5) + 2407;
 365         }
 366         else
 367         {
 368                 if (channel >= 182 && channel <= 196)
 369                         return (channel * 5) + 4000;
 370                 else
 371                         return (channel * 5) + 5000;
 372         }
 373
 374         return 0;
 375 }
 376
 377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
 378 {
 379         int i, len;
 380         char lkey[64] = { 0 };
 381         const char *ln = buf;
 382         static char lval[256] = { 0 };
 383
 384         int matched_if = ifname ? 0 : 1;
 385
 386
 387         for( i = 0, len = strlen(buf); i < len; i++ )
 388         {
 389                 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
 390                 {
 391                         ln++;
 392                 }
 393                 else if (!lkey[0] && (buf[i] == '='))
 394                 {
 395                         if ((&buf[i] - ln) > 0)
 396                                 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
 397                 }
 398                 else if (buf[i] == '\n')
 399                 {
 400                         if (lkey[0])
 401                         {
 402                                 memcpy(lval, ln + strlen(lkey) + 1,
 403                                         min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
 404
 405                                 if ((ifname != NULL) &&
 406                                     (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
 407                                 {
 408                                         matched_if = !strcmp(lval, ifname);
 409                                 }
 410                                 else if (matched_if && !strcmp(lkey, key))
 411                                 {
 412                                         return lval;
 413                                 }
 414                         }
 415
 416                         ln = &buf[i+1];
 417                         memset(lkey, 0, sizeof(lkey));
 418                         memset(lval, 0, sizeof(lval));
 419                 }
 420         }
 421
 422         return NULL;
 423 }
 424
 425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
 426 {
 427         char *buf = arg;
 428         struct nlattr **attr = nl80211_parse(msg);
 429
 430         if (attr[NL80211_ATTR_WIPHY_NAME])
 431                 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
 432                        nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
 433         else
 434                 buf[0] = 0;
 435
 436         return NL_SKIP;
 437 }
 438
 439 static char * nl80211_ifname2phy(const char *ifname)
 440 {
 441         static char phy[32] = { 0 };
 442         struct nl80211_msg_conveyor *req;
 443
 444         memset(phy, 0, sizeof(phy));
 445
 446         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
 447         if (req)
 448         {
 449                 nl80211_send(req, nl80211_ifname2phy_cb, phy);
 450                 nl80211_free(req);
 451         }
 452
 453         return phy[0] ? phy : NULL;
 454 }
 455
 456 static char * nl80211_hostapd_info(const char *ifname)
 457 {
 458         int mode;
 459         char *phy;
 460         char path[32] = { 0 };
 461         static char buf[4096] = { 0 };
 462         FILE *conf;
 463
 464         if (nl80211_get_mode(ifname, &mode))
 465                 return NULL;
 466
 467         if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
 468             (phy = nl80211_ifname2phy(ifname)) != NULL)
 469         {
 470                 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
 471
 472                 if ((conf = fopen(path, "r")) != NULL)
 473                 {
 474                         fread(buf, sizeof(buf) - 1, 1, conf);
 475                         fclose(conf);
 476
 477                         return buf;
 478                 }
 479         }
 480
 481         return NULL;
 482 }
 483
 484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
 485 {
 486         fd_set rfds;
 487         struct timeval tv = { 2, 0 };
 488
 489         FD_ZERO(&rfds);
 490         FD_SET(sock, &rfds);
 491
 492         memset(buf, 0, blen);
 493
 494
 495         if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
 496                 return -1;
 497
 498         if (!FD_ISSET(sock, &rfds))
 499                 return -1;
 500
 501         return recv(sock, buf, blen, 0);
 502 }
 503
 504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
 505                                                                    const char *event)
 506 {
 507         int numtry = 0;
 508         int sock = -1;
 509         char *rv = NULL;
 510         size_t remote_length, local_length;
 511         static char buffer[10240] = { 0 };
 512
 513         struct sockaddr_un local = { 0 };
 514         struct sockaddr_un remote = { 0 };
 515
 516
 517         sock = socket(PF_UNIX, SOCK_DGRAM, 0);
 518         if (sock < 0)
 519                 return NULL;
 520
 521         remote.sun_family = AF_UNIX;
 522         remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
 523                 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
 524
 525         if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
 526                 goto out;
 527
 528         if (connect(sock, (struct sockaddr *) &remote, remote_length))
 529                 goto out;
 530
 531         local.sun_family = AF_UNIX;
 532         local_length = sizeof(local.sun_family) +
 533                 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
 534
 535         if (bind(sock, (struct sockaddr *) &local, local_length))
 536                 goto out;
 537
 538
 539         if (event)
 540         {
 541                 send(sock, "ATTACH", 6, 0);
 542
 543                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
 544                         goto out;
 545         }
 546
 547
 548         send(sock, cmd, strlen(cmd), 0);
 549
 550         /* we might have to scan up to 72 channels / 256ms per channel */
 551         /* this makes up to 18.5s hence 10 tries */
 552         while( numtry++ < 10 )
 553         {
 554                 char *bracket;
 555
 556                 /* make sure there is a terminating nul byte */
 557                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
 558                 {
 559                         if (event)
 560                                 continue;
 561
 562                         break;
 563                 }
 564
 565                 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
 566                         break;
 567
 568                 /* there may be more than max(numtry) BSS-ADDED events */
 569                 /* ignore them similar to wpa_cli */
 570                 if (buffer[0] == '<' &&
 571                                 (bracket=strchr(buffer,'>')) != NULL &&
 572                                 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
 573                         numtry--;
 574         }
 575
 576         rv = buffer;
 577
 578 out:
 579         close(sock);
 580
 581         if (local.sun_family)
 582                 unlink(local.sun_path);
 583
 584         return rv;
 585 }
 586
 587 static inline int nl80211_readint(const char *path)
 588 {
 589         int fd;
 590         int rv = -1;
 591         char buffer[16];
 592
 593         if ((fd = open(path, O_RDONLY)) > -1)
 594         {
 595                 if (read(fd, buffer, sizeof(buffer)) > 0)
 596                         rv = atoi(buffer);
 597
 598                 close(fd);
 599         }
 600
 601         return rv;
 602 }
 603
 604 static char * nl80211_phy2ifname(const char *ifname)
 605 {
 606         int fd, ifidx = -1, cifidx = -1, phyidx = -1;
 607         char buffer[64];
 608         static char nif[IFNAMSIZ] = { 0 };
 609
 610         DIR *d;
 611         struct dirent *e;
 612
 613         if (!ifname)
 614                 return NULL;
 615         else if (!strncmp(ifname, "phy", 3))
 616                 phyidx = atoi(&ifname[3]);
 617         else if (!strncmp(ifname, "radio", 5))
 618                 phyidx = atoi(&ifname[5]);
 619
 620         memset(nif, 0, sizeof(nif));
 621
 622         if (phyidx > -1)
 623         {
 624                 if ((d = opendir("/sys/class/net")) != NULL)
 625                 {
 626                         while ((e = readdir(d)) != NULL)
 627                         {
 628                                 snprintf(buffer, sizeof(buffer),
 629                                          "/sys/class/net/%s/phy80211/index", e->d_name);
 630
 631                                 if (nl80211_readint(buffer) == phyidx)
 632                                 {
 633                                         snprintf(buffer, sizeof(buffer),
 634                                                  "/sys/class/net/%s/ifindex", e->d_name);
 635
 636                                         if ((cifidx = nl80211_readint(buffer)) >= 0 &&
 637                                             ((ifidx < 0) || (cifidx < ifidx)))
 638                                         {
 639                                                 ifidx = cifidx;
 640                                                 strncpy(nif, e->d_name, sizeof(nif));
 641                                         }
 642                                 }
 643                         }
 644
 645                         closedir(d);
 646                 }
 647         }
 648
 649         return nif[0] ? nif : NULL;
 650 }
 651
 652 static char * nl80211_ifadd(const char *ifname)
 653 {
 654         int phyidx;
 655         char *rv = NULL;
 656         static char nif[IFNAMSIZ] = { 0 };
 657         struct nl80211_msg_conveyor *req, *res;
 658
 659         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 660         if (req)
 661         {
 662                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 663
 664                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 665                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 666
 667                 nl80211_send(req, NULL, NULL);
 668
 669                 rv = nif;
 670
 671         nla_put_failure:
 672                 nl80211_free(req);
 673         }
 674
 675         return rv;
 676 }
 677
 678 static void nl80211_ifdel(const char *ifname)
 679 {
 680         struct nl80211_msg_conveyor *req;
 681
 682         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 683         if (req)
 684         {
 685                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 686
 687                 nl80211_send(req, NULL, NULL);
 688
 689         nla_put_failure:
 690                 nl80211_free(req);
 691         }
 692 }
 693
 694 static void nl80211_hostapd_hup(const char *ifname)
 695 {
 696         int fd, pid = 0;
 697         char buf[32];
 698         char *phy = nl80211_ifname2phy(ifname);
 699
 700         if (phy)
 701         {
 702                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 703                 if ((fd = open(buf, O_RDONLY)) > 0)
 704                 {
 705                         if (read(fd, buf, sizeof(buf)) > 0)
 706                                 pid = atoi(buf);
 707
 708                         close(fd);
 709                 }
 710
 711                 if (pid > 0)
 712                         kill(pid, 1);
 713         }
 714 }
 715
 716
 717 int nl80211_probe(const char *ifname)
 718 {
 719         return !!nl80211_ifname2phy(ifname);
 720 }
 721
 722 void nl80211_close(void)
 723 {
 724         if (nls)
 725         {
 726                 if (nls->nlctrl)
 727                         genl_family_put(nls->nlctrl);
 728
 729                 if (nls->nl80211)
 730                         genl_family_put(nls->nl80211);
 731
 732                 if (nls->nl_sock)
 733                         nl_socket_free(nls->nl_sock);
 734
 735                 if (nls->nl_cache)
 736                         nl_cache_free(nls->nl_cache);
 737
 738                 free(nls);
 739                 nls = NULL;
 740         }
 741 }
 742
 743
 744 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
 745 {
 746         int *mode = arg;
 747         struct nlattr **tb = nl80211_parse(msg);
 748         const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
 749                 IWINFO_OPMODE_UNKNOWN,          /* unspecified */
 750                 IWINFO_OPMODE_ADHOC,            /* IBSS */
 751                 IWINFO_OPMODE_CLIENT,           /* managed */
 752                 IWINFO_OPMODE_MASTER,           /* AP */
 753                 IWINFO_OPMODE_AP_VLAN,          /* AP/VLAN */
 754                 IWINFO_OPMODE_WDS,                      /* WDS */
 755                 IWINFO_OPMODE_MONITOR,          /* monitor */
 756                 IWINFO_OPMODE_MESHPOINT,        /* mesh point */
 757                 IWINFO_OPMODE_P2P_CLIENT,       /* P2P-client */
 758                 IWINFO_OPMODE_P2P_GO,           /* P2P-GO */
 759         };
 760
 761         if (tb[NL80211_ATTR_IFTYPE])
 762                 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
 763
 764         return NL_SKIP;
 765 }
 766
 767 int nl80211_get_mode(const char *ifname, int *buf)
 768 {
 769         char *res;
 770         struct nl80211_msg_conveyor *req;
 771
 772         res = nl80211_phy2ifname(ifname);
 773         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 774         *buf = IWINFO_OPMODE_UNKNOWN;
 775
 776         if (req)
 777         {
 778                 nl80211_send(req, nl80211_get_mode_cb, buf);
 779                 nl80211_free(req);
 780         }
 781
 782         return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
 783 }
 784
 785
 786 struct nl80211_ssid_bssid {
 787         unsigned char *ssid;
 788         unsigned char bssid[7];
 789 };
 790
 791 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
 792 {
 793         int ielen;
 794         unsigned char *ie;
 795         struct nl80211_ssid_bssid *sb = arg;
 796         struct nlattr **tb = nl80211_parse(msg);
 797         struct nlattr *bss[NL80211_BSS_MAX + 1];
 798
 799         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 800                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
 801                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
 802         };
 803
 804         if (!tb[NL80211_ATTR_BSS] ||
 805             nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
 806                              bss_policy) ||
 807             !bss[NL80211_BSS_BSSID] ||
 808             !bss[NL80211_BSS_STATUS] ||
 809             !bss[NL80211_BSS_INFORMATION_ELEMENTS])
 810         {
 811                 return NL_SKIP;
 812         }
 813
 814         switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
 815         {
 816         case NL80211_BSS_STATUS_ASSOCIATED:
 817         case NL80211_BSS_STATUS_AUTHENTICATED:
 818         case NL80211_BSS_STATUS_IBSS_JOINED:
 819
 820                 if (sb->ssid)
 821                 {
 822                         ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
 823                         ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
 824
 825                         while (ielen >= 2 && ielen >= ie[1])
 826                         {
 827                                 if (ie[0] == 0)
 828                                 {
 829                                         memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
 830                                         return NL_SKIP;
 831                                 }
 832
 833                                 ielen -= ie[1] + 2;
 834                                 ie += ie[1] + 2;
 835                         }
 836                 }
 837                 else
 838                 {
 839                         sb->bssid[0] = 1;
 840                         memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
 841                         return NL_SKIP;
 842                 }
 843
 844         default:
 845                 return NL_SKIP;
 846         }
 847 }
 848
 849 int nl80211_get_ssid(const char *ifname, char *buf)
 850 {
 851         char *res;
 852         struct nl80211_msg_conveyor *req;
 853         struct nl80211_ssid_bssid sb;
 854
 855         /* try to find ssid from scan dump results */
 856         res = nl80211_phy2ifname(ifname);
 857         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
 858
 859         sb.ssid = buf;
 860         *buf = 0;
 861
 862         if (req)
 863         {
 864                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
 865                 nl80211_free(req);
 866         }
 867
 868         /* failed, try to find from hostapd info */
 869         if ((*buf == 0) &&
 870             (res = nl80211_hostapd_info(ifname)) &&
 871             (res = nl80211_getval(ifname, res, "ssid")))
 872         {
 873                 memcpy(buf, res, strlen(res));
 874         }
 875
 876         return (*buf == 0) ? -1 : 0;
 877 }
 878
 879 int nl80211_get_bssid(const char *ifname, char *buf)
 880 {
 881         char *res;
 882         struct nl80211_msg_conveyor *req;
 883         struct nl80211_ssid_bssid sb;
 884
 885         /* try to find bssid from scan dump results */
 886         res = nl80211_phy2ifname(ifname);
 887         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
 888
 889         sb.ssid = NULL;
 890         sb.bssid[0] = 0;
 891
 892         if (req)
 893         {
 894                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
 895                 nl80211_free(req);
 896         }
 897
 898         /* failed, try to find mac from hostapd info */
 899         if ((sb.bssid[0] == 0) &&
 900             (res = nl80211_hostapd_info(ifname)) &&
 901             (res = nl80211_getval(ifname, res, "bssid")))
 902         {
 903                 sb.bssid[0] = 1;
 904                 sb.bssid[1] = strtol(&res[0],  NULL, 16);
 905                 sb.bssid[2] = strtol(&res[3],  NULL, 16);
 906                 sb.bssid[3] = strtol(&res[6],  NULL, 16);
 907                 sb.bssid[4] = strtol(&res[9],  NULL, 16);
 908                 sb.bssid[5] = strtol(&res[12], NULL, 16);
 909                 sb.bssid[6] = strtol(&res[15], NULL, 16);
 910         }
 911
 912         if (sb.bssid[0])
 913         {
 914                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 915                         sb.bssid[1], sb.bssid[2], sb.bssid[3],
 916                         sb.bssid[4], sb.bssid[5], sb.bssid[6]);
 917
 918                 return 0;
 919         }
 920
 921         return -1;
 922 }
 923
 924
 925 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
 926 {
 927         int *freq = arg;
 928         struct nlattr **attr = nl80211_parse(msg);
 929         struct nlattr *binfo[NL80211_BSS_MAX + 1];
 930
 931         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 932                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
 933                 [NL80211_BSS_STATUS]    = { .type = NLA_U32 },
 934         };
 935
 936         if (attr[NL80211_ATTR_BSS] &&
 937             !nla_parse_nested(binfo, NL80211_BSS_MAX,
 938                               attr[NL80211_ATTR_BSS], bss_policy))
 939         {
 940                 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
 941                         *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
 942         }
 943
 944         return NL_SKIP;
 945 }
 946
 947 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
 948 {
 949         int *freq = arg;
 950         struct nlattr **tb = nl80211_parse(msg);
 951
 952         if (tb[NL80211_ATTR_WIPHY_FREQ])
 953                 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 954
 955         return NL_SKIP;
 956 }
 957
 958 int nl80211_get_frequency(const char *ifname, int *buf)
 959 {
 960         int chn;
 961         char *res, *channel;
 962         struct nl80211_msg_conveyor *req;
 963
 964         /* try to find frequency from interface info */
 965         res = nl80211_phy2ifname(ifname);
 966         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 967         *buf = 0;
 968
 969         if (req)
 970         {
 971                 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
 972                 nl80211_free(req);
 973         }
 974
 975         /* failed, try to find frequency from hostapd info */
 976         if ((*buf == 0) &&
 977             (res = nl80211_hostapd_info(ifname)) &&
 978             (channel = nl80211_getval(NULL, res, "channel")))
 979         {
 980                 chn = atoi(channel);
 981                 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
 982         }
 983         else
 984         {
 985                 /* failed, try to find frequency from scan results */
 986                 if (*buf == 0)
 987                 {
 988                         res = nl80211_phy2ifname(ifname);
 989                         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
 990                                           NLM_F_DUMP);
 991
 992                         if (req)
 993                         {
 994                                 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
 995                                 nl80211_free(req);
 996                         }
 997                 }
 998         }
 999
1000         return (*buf == 0) ? -1 : 0;
1001 }
1002
1003 int nl80211_get_channel(const char *ifname, int *buf)
1004 {
1005         if (!nl80211_get_frequency(ifname, buf))
1006         {
1007                 *buf = nl80211_freq2channel(*buf);
1008                 return 0;
1009         }
1010
1011         return -1;
1012 }
1013
1014
1015 int nl80211_get_txpower(const char *ifname, int *buf)
1016 {
1017 #if 0
1018         char *res;
1019         char path[PATH_MAX];
1020
1021         res = nl80211_ifname2phy(ifname);
1022         snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1023                  res ? res : ifname);
1024
1025         if ((*buf = nl80211_readint(path)) > -1)
1026                 return 0;
1027 #endif
1028
1029         return wext_get_txpower(ifname, buf);
1030 }
1031
1032
1033 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1034 {
1035         int8_t dbm;
1036         int16_t mbit;
1037         struct nl80211_rssi_rate *rr = arg;
1038         struct nlattr **attr = nl80211_parse(msg);
1039         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1040         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1041
1042         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1043                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1044                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1045                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1046                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1047                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1048                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1049                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1050                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1051                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1052                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1053         };
1054
1055         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1056                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1057                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1058                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1059                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1060         };
1061
1062         if (attr[NL80211_ATTR_STA_INFO])
1063         {
1064                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1065                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1066                 {
1067                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1068                         {
1069                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1070                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1071                         }
1072
1073                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1074                         {
1075                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1076                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1077                                                       rate_policy))
1078                                 {
1079                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1080                                         {
1081                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1082                                                 rr->rate = rr->rate
1083                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1084                                         }
1085                                 }
1086                         }
1087                 }
1088         }
1089
1090         return NL_SKIP;
1091 }
1092
1093 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1094 {
1095         DIR *d;
1096         struct dirent *de;
1097         struct nl80211_msg_conveyor *req;
1098
1099         r->rssi = 0;
1100         r->rate = 0;
1101
1102         if ((d = opendir("/sys/class/net")) != NULL)
1103         {
1104                 while ((de = readdir(d)) != NULL)
1105                 {
1106                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1107                             (!de->d_name[strlen(ifname)] ||
1108                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1109                         {
1110                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1111                                                   NLM_F_DUMP);
1112
1113                                 if (req)
1114                                 {
1115                                         nl80211_send(req, nl80211_fill_signal_cb, r);
1116                                         nl80211_free(req);
1117                                 }
1118                         }
1119                 }
1120
1121                 closedir(d);
1122         }
1123 }
1124
1125 int nl80211_get_bitrate(const char *ifname, int *buf)
1126 {
1127         struct nl80211_rssi_rate rr;
1128
1129         nl80211_fill_signal(ifname, &rr);
1130
1131         if (rr.rate)
1132         {
1133                 *buf = (rr.rate * 100);
1134                 return 0;
1135         }
1136
1137         return -1;
1138 }
1139
1140 int nl80211_get_signal(const char *ifname, int *buf)
1141 {
1142         struct nl80211_rssi_rate rr;
1143
1144         nl80211_fill_signal(ifname, &rr);
1145
1146         if (rr.rssi)
1147         {
1148                 *buf = rr.rssi;
1149                 return 0;
1150         }
1151
1152         return -1;
1153 }
1154
1155 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1156 {
1157         int8_t *noise = arg;
1158         struct nlattr **tb = nl80211_parse(msg);
1159         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1160
1161         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1162                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1163                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1164         };
1165
1166         if (!tb[NL80211_ATTR_SURVEY_INFO])
1167                 return NL_SKIP;
1168
1169         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1170                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1171                 return NL_SKIP;
1172
1173         if (!si[NL80211_SURVEY_INFO_NOISE])
1174                 return NL_SKIP;
1175
1176         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1177                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1178
1179         return NL_SKIP;
1180 }
1181
1182
1183 int nl80211_get_noise(const char *ifname, int *buf)
1184 {
1185         int8_t noise;
1186         struct nl80211_msg_conveyor *req;
1187
1188         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1189         if (req)
1190         {
1191                 noise = 0;
1192
1193                 nl80211_send(req, nl80211_get_noise_cb, &noise);
1194                 nl80211_free(req);
1195
1196                 if (noise)
1197                 {
1198                         *buf = noise;
1199                         return 0;
1200                 }
1201         }
1202
1203         return -1;
1204 }
1205
1206 int nl80211_get_quality(const char *ifname, int *buf)
1207 {
1208         int signal;
1209
1210         if (!nl80211_get_signal(ifname, &signal))
1211         {
1212                 /* A positive signal level is usually just a quality
1213                  * value, pass through as-is */
1214                 if (signal >= 0)
1215                 {
1216                         *buf = signal;
1217                 }
1218
1219                 /* The cfg80211 wext compat layer assumes a signal range
1220                  * of -110 dBm to -40 dBm, the quality value is derived
1221                  * by adding 110 to the signal level */
1222                 else
1223                 {
1224                         if (signal < -110)
1225                                 signal = -110;
1226                         else if (signal > -40)
1227                                 signal = -40;
1228
1229                         *buf = (signal + 110);
1230                 }
1231
1232                 return 0;
1233         }
1234
1235         return -1;
1236 }
1237
1238 int nl80211_get_quality_max(const char *ifname, int *buf)
1239 {
1240         /* The cfg80211 wext compat layer assumes a maximum
1241          * quality of 70 */
1242         *buf = 70;
1243
1244         return 0;
1245 }
1246
1247 int nl80211_get_encryption(const char *ifname, char *buf)
1248 {
1249         int i;
1250         char k[9];
1251         char *val, *res;
1252         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1253
1254         /* WPA supplicant */
1255         if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1256             (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1257         {
1258                 /* WEP */
1259                 if (strstr(val, "WEP"))
1260                 {
1261                         if (strstr(val, "WEP-40"))
1262                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1263
1264                         else if (strstr(val, "WEP-104"))
1265                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1266
1267                         c->enabled       = 1;
1268                         c->group_ciphers = c->pair_ciphers;
1269
1270                         c->auth_suites |= IWINFO_KMGMT_NONE;
1271                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1272                 }
1273
1274                 /* WPA */
1275                 else
1276                 {
1277                         if (strstr(val, "TKIP"))
1278                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1279
1280                         else if (strstr(val, "CCMP"))
1281                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1282
1283                         else if (strstr(val, "NONE"))
1284                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1285
1286                         else if (strstr(val, "WEP-40"))
1287                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1288
1289                         else if (strstr(val, "WEP-104"))
1290                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1291
1292
1293                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
1294                         {
1295                                 if (strstr(val, "TKIP"))
1296                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
1297
1298                                 else if (strstr(val, "CCMP"))
1299                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
1300
1301                                 else if (strstr(val, "NONE"))
1302                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
1303
1304                                 else if (strstr(val, "WEP-40"))
1305                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
1306
1307                                 else if (strstr(val, "WEP-104"))
1308                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
1309                         }
1310
1311
1312                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1313                         {
1314                                 if (strstr(val, "WPA2"))
1315                                         c->wpa_version = 2;
1316
1317                                 else if (strstr(val, "WPA"))
1318                                         c->wpa_version = 1;
1319
1320
1321                                 if (strstr(val, "PSK"))
1322                                         c->auth_suites |= IWINFO_KMGMT_PSK;
1323
1324                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1325                                         c->auth_suites |= IWINFO_KMGMT_8021x;
1326
1327                                 else if (strstr(val, "NONE"))
1328                                         c->auth_suites |= IWINFO_KMGMT_NONE;
1329                         }
1330
1331                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1332                 }
1333
1334                 return 0;
1335         }
1336
1337         /* Hostapd */
1338         else if ((res = nl80211_hostapd_info(ifname)))
1339         {
1340                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1341                         c->wpa_version = atoi(val);
1342
1343                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1344
1345                 if (!val || strstr(val, "PSK"))
1346                         c->auth_suites |= IWINFO_KMGMT_PSK;
1347
1348                 if (val && strstr(val, "EAP"))
1349                         c->auth_suites |= IWINFO_KMGMT_8021x;
1350
1351                 if (val && strstr(val, "NONE"))
1352                         c->auth_suites |= IWINFO_KMGMT_NONE;
1353
1354                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1355                 {
1356                         if (strstr(val, "TKIP"))
1357                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1358
1359                         if (strstr(val, "CCMP"))
1360                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1361
1362                         if (strstr(val, "NONE"))
1363                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1364                 }
1365
1366                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1367                 {
1368                         switch(atoi(val)) {
1369                                 case 1:
1370                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1371                                         break;
1372
1373                                 case 2:
1374                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1375                                         break;
1376
1377                                 case 3:
1378                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1379                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1380                                         break;
1381
1382                                 default:
1383                                         break;
1384                         }
1385
1386                         for (i = 0; i < 4; i++)
1387                         {
1388                                 snprintf(k, sizeof(k), "wep_key%d", i);
1389
1390                                 if ((val = nl80211_getval(ifname, res, k)))
1391                                 {
1392                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1393                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1394
1395                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1396                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1397                                 }
1398                         }
1399                 }
1400
1401                 c->group_ciphers = c->pair_ciphers;
1402                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1403
1404                 return 0;
1405         }
1406
1407         return -1;
1408 }
1409
1410
1411 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1412 {
1413         struct nl80211_array_buf *arr = arg;
1414         struct iwinfo_assoclist_entry *e = arr->buf;
1415         struct nlattr **attr = nl80211_parse(msg);
1416         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1417         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1418
1419         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1420                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1421                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1422                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1423                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1424                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1425                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1426         };
1427
1428         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1429                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1430                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1431                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1432                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1433         };
1434
1435         /* advance to end of array */
1436         e += arr->count;
1437         memset(e, 0, sizeof(*e));
1438
1439         if (attr[NL80211_ATTR_MAC])
1440                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1441
1442         if (attr[NL80211_ATTR_STA_INFO] &&
1443             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1444                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1445         {
1446                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1447                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1448
1449                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1450                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1451
1452                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1453                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1454
1455                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1456                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1457
1458                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1459                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1460                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1461                 {
1462                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1463                                 e->rx_rate.rate =
1464                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1465
1466                         if (rinfo[NL80211_RATE_INFO_MCS])
1467                                 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1468
1469                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1470                                 e->rx_rate.is_40mhz = 1;
1471
1472                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1473                                 e->rx_rate.is_short_gi = 1;
1474                 }
1475
1476                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1477                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1478                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1479                 {
1480                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1481                                 e->tx_rate.rate =
1482                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1483
1484                         if (rinfo[NL80211_RATE_INFO_MCS])
1485                                 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1486
1487                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1488                                 e->tx_rate.is_40mhz = 1;
1489
1490                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1491                                 e->tx_rate.is_short_gi = 1;
1492                 }
1493         }
1494
1495         e->noise = 0; /* filled in by caller */
1496         arr->count++;
1497
1498         return NL_SKIP;
1499 }
1500
1501 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1502 {
1503         DIR *d;
1504         int i, noise = 0;
1505         struct dirent *de;
1506         struct nl80211_msg_conveyor *req;
1507         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1508         struct iwinfo_assoclist_entry *e;
1509
1510         if ((d = opendir("/sys/class/net")) != NULL)
1511         {
1512                 while ((de = readdir(d)) != NULL)
1513                 {
1514                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1515                             (!de->d_name[strlen(ifname)] ||
1516                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1517                         {
1518                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1519                                                   NLM_F_DUMP);
1520
1521                                 if (req)
1522                                 {
1523                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1524                                         nl80211_free(req);
1525                                 }
1526                         }
1527                 }
1528
1529                 closedir(d);
1530
1531                 if (!nl80211_get_noise(ifname, &noise))
1532                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1533                                 e->noise = noise;
1534
1535                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1536                 return 0;
1537         }
1538
1539         return -1;
1540 }
1541
1542 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1543 {
1544         int *dbm_max = arg;
1545         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1546
1547         struct nlattr **attr = nl80211_parse(msg);
1548         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1549         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1550         struct nlattr *band, *freq;
1551
1552         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1553                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1554                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1555                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1556                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1557                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1558                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1559         };
1560
1561         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1562         *dbm_max = -1;
1563
1564         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1565         {
1566                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1567                           nla_len(band), NULL);
1568
1569                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1570                 {
1571                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1572                                   nla_data(freq), nla_len(freq), freq_policy);
1573
1574                         ch_cmp = nl80211_freq2channel(nla_get_u32(
1575                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1576
1577                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
1578                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1579                         {
1580                                 *dbm_max = (int)(0.01 * nla_get_u32(
1581                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1582
1583                                 break;
1584                         }
1585                 }
1586         }
1587
1588         return NL_SKIP;
1589 }
1590
1591 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1592 {
1593         int ch_cur;
1594         int dbm_max = -1, dbm_cur, dbm_cnt;
1595         struct nl80211_msg_conveyor *req;
1596         struct iwinfo_txpwrlist_entry entry;
1597
1598         if (nl80211_get_channel(ifname, &ch_cur))
1599                 ch_cur = 0;
1600
1601         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1602         if (req)
1603         {
1604                 /* initialize the value pointer with channel for callback */
1605                 dbm_max = ch_cur;
1606
1607                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1608                 nl80211_free(req);
1609         }
1610
1611         if (dbm_max > 0)
1612         {
1613                 for (dbm_cur = 0, dbm_cnt = 0;
1614                      dbm_cur < dbm_max;
1615                      dbm_cur++, dbm_cnt++)
1616                 {
1617                         entry.dbm = dbm_cur;
1618                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1619
1620                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1621                 }
1622
1623                 entry.dbm = dbm_max;
1624                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1625
1626                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1627                 dbm_cnt++;
1628
1629                 *len = dbm_cnt * sizeof(entry);
1630                 return 0;
1631         }
1632
1633         return -1;
1634 }
1635
1636 static void nl80211_get_scancrypto(const char *spec,
1637         struct iwinfo_crypto_entry *c)
1638 {
1639         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1640         {
1641                 c->enabled = 1;
1642
1643                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1644                         c->wpa_version = 3;
1645
1646                 else if (strstr(spec, "WPA2"))
1647                         c->wpa_version = 2;
1648
1649                 else if (strstr(spec, "WPA"))
1650                         c->wpa_version = 1;
1651
1652                 else if (strstr(spec, "WEP"))
1653                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1654
1655
1656                 if (strstr(spec, "PSK"))
1657                         c->auth_suites |= IWINFO_KMGMT_PSK;
1658
1659                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1660                         c->auth_suites |= IWINFO_KMGMT_8021x;
1661
1662                 if (strstr(spec, "WPA-NONE"))
1663                         c->auth_suites |= IWINFO_KMGMT_NONE;
1664
1665
1666                 if (strstr(spec, "TKIP"))
1667                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1668
1669                 if (strstr(spec, "CCMP"))
1670                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1671
1672                 if (strstr(spec, "WEP-40"))
1673                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1674
1675                 if (strstr(spec, "WEP-104"))
1676                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1677
1678                 c->group_ciphers = c->pair_ciphers;
1679         }
1680         else
1681         {
1682                 c->enabled = 0;
1683         }
1684 }
1685
1686
1687 struct nl80211_scanlist {
1688         struct iwinfo_scanlist_entry *e;
1689         int len;
1690 };
1691
1692
1693 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1694                                     struct iwinfo_scanlist_entry *e)
1695 {
1696         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1697         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1698         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1699
1700         while (ielen >= 2 && ielen >= ie[1])
1701         {
1702                 switch (ie[0])
1703                 {
1704                 case 0: /* SSID */
1705                         memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1706                         break;
1707
1708                 case 48: /* RSN */
1709                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1710                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1711                         break;
1712
1713                 case 221: /* Vendor */
1714                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1715                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1716                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1717                         break;
1718                 }
1719
1720                 ielen -= ie[1] + 2;
1721                 ie += ie[1] + 2;
1722         }
1723 }
1724
1725 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1726 {
1727         int8_t rssi;
1728         uint16_t caps;
1729
1730         struct nl80211_scanlist *sl = arg;
1731         struct nlattr **tb = nl80211_parse(msg);
1732         struct nlattr *bss[NL80211_BSS_MAX + 1];
1733
1734         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1735                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
1736                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
1737                 [NL80211_BSS_BSSID]                = {                 },
1738                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
1739                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
1740                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
1741                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
1742                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
1743                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
1744                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
1745                 [NL80211_BSS_BEACON_IES]           = {                 },
1746         };
1747
1748         if (!tb[NL80211_ATTR_BSS] ||
1749                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1750                                  bss_policy) ||
1751                 !bss[NL80211_BSS_BSSID])
1752         {
1753                 return NL_SKIP;
1754         }
1755
1756         if (bss[NL80211_BSS_CAPABILITY])
1757                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1758         else
1759                 caps = 0;
1760
1761         memset(sl->e, 0, sizeof(*sl->e));
1762         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1763
1764         if (caps & (1<<1))
1765                 sl->e->mode = IWINFO_OPMODE_ADHOC;
1766         else if (caps & (1<<0))
1767                 sl->e->mode = IWINFO_OPMODE_MASTER;
1768         else
1769                 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1770
1771         if (caps & (1<<4))
1772                 sl->e->crypto.enabled = 1;
1773
1774         if (bss[NL80211_BSS_FREQUENCY])
1775                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1776                         bss[NL80211_BSS_FREQUENCY]));
1777
1778         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1779                 nl80211_get_scanlist_ie(bss, sl->e);
1780
1781         if (bss[NL80211_BSS_SIGNAL_MBM])
1782         {
1783                 sl->e->signal =
1784                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1785
1786                 rssi = sl->e->signal - 0x100;
1787
1788                 if (rssi < -110)
1789                         rssi = -110;
1790                 else if (rssi > -40)
1791                         rssi = -40;
1792
1793                 sl->e->quality = (rssi + 110);
1794                 sl->e->quality_max = 70;
1795         }
1796
1797         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1798         {
1799                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1800                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1801         }
1802
1803         sl->e++;
1804         sl->len++;
1805
1806         return NL_SKIP;
1807 }
1808
1809 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1810 {
1811         struct nl80211_msg_conveyor *req;
1812         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1813
1814         req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1815         if (req)
1816         {
1817                 nl80211_send(req, NULL, NULL);
1818                 nl80211_free(req);
1819         }
1820
1821         nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1822
1823         req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1824         if (req)
1825         {
1826                 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1827                 nl80211_free(req);
1828         }
1829
1830         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1831         return *len ? 0 : -1;
1832 }
1833
1834 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1835 {
1836         int freq, rssi, qmax, count;
1837         char *res;
1838         char ssid[128] = { 0 };
1839         char bssid[18] = { 0 };
1840         char cipher[256] = { 0 };
1841
1842         /* Got a radioX pseudo interface, find some interface on it or create one */
1843         if (!strncmp(ifname, "radio", 5))
1844         {
1845                 /* Reuse existing interface */
1846                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1847                 {
1848                         return nl80211_get_scanlist(res, buf, len);
1849                 }
1850
1851                 /* Need to spawn a temporary iface for scanning */
1852                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1853                 {
1854                         count = nl80211_get_scanlist(res, buf, len);
1855                         nl80211_ifdel(res);
1856                         return count;
1857                 }
1858         }
1859
1860         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1861
1862         /* WPA supplicant */
1863         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1864         {
1865                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1866                 {
1867                         nl80211_get_quality_max(ifname, &qmax);
1868
1869                         count = -1;
1870
1871                         do {
1872                                 if (res[0] == '<')
1873                                 {
1874                                         /* skip log lines */
1875                                         goto nextline;
1876                                 }
1877                                 if (count < 0)
1878                                 {
1879                                         /* skip header line */
1880                                         count++;
1881                                         goto nextline;
1882                                 }
1883                                 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1884                                               bssid, &freq, &rssi, cipher, ssid) < 5)
1885                                 {
1886                                         /* skip malformed lines */
1887                                         goto nextline;
1888                                 }
1889                                 /* BSSID */
1890                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1891                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1892                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1893                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1894                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1895                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1896
1897                                 /* SSID */
1898                                 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1899
1900                                 /* Mode (assume master) */
1901                                 if (strstr(cipher,"[MESH]"))
1902                                         e->mode = IWINFO_OPMODE_MESHPOINT;
1903                                 else
1904                                         e->mode = IWINFO_OPMODE_MASTER;
1905
1906                                 /* Channel */
1907                                 e->channel = nl80211_freq2channel(freq);
1908
1909                                 /* Signal */
1910                                 e->signal = rssi;
1911
1912                                 /* Quality */
1913                                 if (rssi < 0)
1914                                 {
1915                                         /* The cfg80211 wext compat layer assumes a signal range
1916                                          * of -110 dBm to -40 dBm, the quality value is derived
1917                                          * by adding 110 to the signal level */
1918                                         if (rssi < -110)
1919                                                 rssi = -110;
1920                                         else if (rssi > -40)
1921                                                 rssi = -40;
1922
1923                                         e->quality = (rssi + 110);
1924                                 }
1925                                 else
1926                                 {
1927                                         e->quality = rssi;
1928                                 }
1929
1930                                 /* Max. Quality */
1931                                 e->quality_max = qmax;
1932
1933                                 /* Crypto */
1934                                 nl80211_get_scancrypto(cipher, &e->crypto);
1935
1936                                 count++;
1937                                 e++;
1938
1939                                 memset(ssid, 0, sizeof(ssid));
1940                                 memset(bssid, 0, sizeof(bssid));
1941                                 memset(cipher, 0, sizeof(cipher));
1942
1943                         nextline:
1944                                 /* advance to next line */
1945                                 while( *res && *res++ != '\n' );
1946                         }
1947                         while( *res );
1948
1949                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1950                         return 0;
1951                 }
1952         }
1953
1954         /* AP scan */
1955         else
1956         {
1957                 /* Got a temp interface, don't create yet another one */
1958                 if (!strncmp(ifname, "tmp.", 4))
1959                 {
1960                         if (!iwinfo_ifup(ifname))
1961                                 return -1;
1962
1963                         nl80211_get_scanlist_nl(ifname, buf, len);
1964                         iwinfo_ifdown(ifname);
1965                         return 0;
1966                 }
1967
1968                 /* Spawn a new scan interface */
1969                 else
1970                 {
1971                         if (!(res = nl80211_ifadd(ifname)))
1972                                 goto out;
1973
1974                         if (!iwinfo_ifmac(res))
1975                                 goto out;
1976
1977                         /* if we can take the new interface up, the driver supports an
1978                          * additional interface and there's no need to tear down the ap */
1979                         if (iwinfo_ifup(res))
1980                         {
1981                                 nl80211_get_scanlist_nl(res, buf, len);
1982                                 iwinfo_ifdown(res);
1983                         }
1984
1985                         /* driver cannot create secondary interface, take down ap
1986                          * during scan */
1987                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1988                         {
1989                                 nl80211_get_scanlist_nl(res, buf, len);
1990                                 iwinfo_ifdown(res);
1991                                 iwinfo_ifup(ifname);
1992                                 nl80211_hostapd_hup(ifname);
1993                         }
1994
1995                 out:
1996                         nl80211_ifdel(res);
1997                         return 0;
1998                 }
1999         }
2000
2001         return -1;
2002 }
2003
2004 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2005 {
2006         int bands_remain, freqs_remain;
2007
2008         struct nl80211_array_buf *arr = arg;
2009         struct iwinfo_freqlist_entry *e = arr->buf;
2010
2011         struct nlattr **attr = nl80211_parse(msg);
2012         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2013         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2014         struct nlattr *band, *freq;
2015
2016         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2017                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
2018                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
2019                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2020                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
2021                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
2022                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
2023         };
2024
2025         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2026         {
2027                 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2028                           nla_data(band), nla_len(band), NULL);
2029
2030                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2031                 {
2032                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2033                                   nla_data(freq), nla_len(freq), NULL);
2034
2035                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2036                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2037                                 continue;
2038
2039                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2040                         e->channel = nl80211_freq2channel(e->mhz);
2041
2042                         e->restricted = (
2043                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2044                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
2045                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2046                         ) ? 1 : 0;
2047
2048                         e++;
2049                         arr->count++;
2050                 }
2051         }
2052
2053         return NL_SKIP;
2054 }
2055
2056 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2057 {
2058         struct nl80211_msg_conveyor *req;
2059         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2060
2061         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2062         if (req)
2063         {
2064                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2065                 nl80211_free(req);
2066         }
2067
2068         if (arr.count > 0)
2069         {
2070                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2071                 return 0;
2072         }
2073
2074         return -1;
2075 }
2076
2077 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2078 {
2079         char *buf = arg;
2080         struct nlattr **attr = nl80211_parse(msg);
2081
2082         if (attr[NL80211_ATTR_REG_ALPHA2])
2083                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2084         else
2085                 buf[0] = 0;
2086
2087         return NL_SKIP;
2088 }
2089
2090 int nl80211_get_country(const char *ifname, char *buf)
2091 {
2092         int rv = -1;
2093         struct nl80211_msg_conveyor *req;
2094
2095         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2096         if (req)
2097         {
2098                 nl80211_send(req, nl80211_get_country_cb, buf);
2099                 nl80211_free(req);
2100
2101                 if (buf[0])
2102                         rv = 0;
2103         }
2104
2105         return rv;
2106 }
2107
2108 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2109 {
2110         int i, count;
2111         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2112         const struct iwinfo_iso3166_label *l;
2113
2114         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2115         {
2116                 e->iso3166 = l->iso3166;
2117                 e->ccode[0] = (l->iso3166 / 256);
2118                 e->ccode[1] = (l->iso3166 % 256);
2119         }
2120
2121         *len = (count * sizeof(struct iwinfo_country_entry));
2122         return 0;
2123 }
2124
2125 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2126 {
2127         int *modes = arg;
2128         int bands_remain, freqs_remain;
2129         uint16_t caps = 0;
2130         struct nlattr **attr = nl80211_parse(msg);
2131         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2132         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2133         struct nlattr *band, *freq;
2134
2135         *modes = 0;
2136
2137         if (attr[NL80211_ATTR_WIPHY_BANDS])
2138         {
2139                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2140                 {
2141                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2142                                   nla_data(band), nla_len(band), NULL);
2143
2144                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2145                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2146
2147                         /* Treat any nonzero capability as 11n */
2148                         if (caps > 0)
2149                                 *modes |= IWINFO_80211_N;
2150
2151                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2152                                             freqs_remain)
2153                         {
2154                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2155                                           nla_data(freq), nla_len(freq), NULL);
2156
2157                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2158                                         continue;
2159
2160                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2161                                 {
2162                                         *modes |= IWINFO_80211_B;
2163                                         *modes |= IWINFO_80211_G;
2164                                 }
2165                                 else
2166                                 {
2167                                         *modes |= IWINFO_80211_A;
2168                                 }
2169                         }
2170                 }
2171         }
2172
2173         return NL_SKIP;
2174 }
2175
2176 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2177 {
2178         struct nl80211_msg_conveyor *req;
2179
2180         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2181         if (req)
2182         {
2183                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2184                 nl80211_free(req);
2185         }
2186
2187         return *buf ? 0 : -1;
2188 }
2189
2190 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2191 {
2192         /* Test whether we can create another interface */
2193         char *nif = nl80211_ifadd(ifname);
2194
2195         if (nif)
2196         {
2197                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2198
2199                 iwinfo_ifdown(nif);
2200                 nl80211_ifdel(nif);
2201
2202                 return 0;
2203         }
2204
2205         return -1;
2206 }
2207
2208 int nl80211_get_hardware_id(const char *ifname, char *buf)
2209 {
2210         int rv;
2211         char *res;
2212
2213         /* Got a radioX pseudo interface, find some interface on it or create one */
2214         if (!strncmp(ifname, "radio", 5))
2215         {
2216                 /* Reuse existing interface */
2217                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2218                 {
2219                         rv = wext_get_hardware_id(res, buf);
2220                 }
2221
2222                 /* Need to spawn a temporary iface for finding IDs */
2223                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2224                 {
2225                         rv = wext_get_hardware_id(res, buf);
2226                         nl80211_ifdel(res);
2227                 }
2228         }
2229         else
2230         {
2231                 rv = wext_get_hardware_id(ifname, buf);
2232         }
2233
2234         /* Failed to obtain hardware IDs, search board config */
2235         if (rv)
2236         {
2237                 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2238         }
2239
2240         return rv;
2241 }
2242
2243 static const struct iwinfo_hardware_entry *
2244 nl80211_get_hardware_entry(const char *ifname)
2245 {
2246         struct iwinfo_hardware_id id;
2247
2248         if (nl80211_get_hardware_id(ifname, (char *)&id))
2249                 return NULL;
2250
2251         return iwinfo_hardware(&id);
2252 }
2253
2254 int nl80211_get_hardware_name(const char *ifname, char *buf)
2255 {
2256         const struct iwinfo_hardware_entry *hw;
2257
2258         if (!(hw = nl80211_get_hardware_entry(ifname)))
2259                 sprintf(buf, "Generic MAC80211");
2260         else
2261                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2262
2263         return 0;
2264 }
2265
2266 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2267 {
2268         const struct iwinfo_hardware_entry *hw;
2269
2270         if (!(hw = nl80211_get_hardware_entry(ifname)))
2271                 return -1;
2272
2273         *buf = hw->txpower_offset;
2274         return 0;
2275 }
2276
2277 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2278 {
2279         const struct iwinfo_hardware_entry *hw;
2280
2281         if (!(hw = nl80211_get_hardware_entry(ifname)))
2282                 return -1;
2283
2284         *buf = hw->frequency_offset;
2285         return 0;
2286 }