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