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         int chn;
 948         char *res, *channel;
 949         struct nl80211_msg_conveyor *req;
 950
 951         /* try to find frequency from interface info */
 952         res = nl80211_phy2ifname(ifname);
 953         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 954         *buf = 0;
 955
 956         if (req)
 957         {
 958                 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
 959                 nl80211_free(req);
 960         }
 961
 962         /* failed, try to find frequency from hostapd info */
 963         if ((*buf == 0) &&
 964             (res = nl80211_hostapd_info(ifname)) &&
 965             (channel = nl80211_getval(NULL, res, "channel")))
 966         {
 967                 chn = atoi(channel);
 968                 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
 969         }
 970         else
 971         {
 972                 /* failed, try to find frequency from scan results */
 973                 if (*buf == 0)
 974                 {
 975                         res = nl80211_phy2ifname(ifname);
 976                         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
 977                                           NLM_F_DUMP);
 978
 979                         if (req)
 980                         {
 981                                 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
 982                                 nl80211_free(req);
 983                         }
 984                 }
 985         }
 986
 987         return (*buf == 0) ? -1 : 0;
 988 }
 989
 990 int nl80211_get_channel(const char *ifname, int *buf)
 991 {
 992         if (!nl80211_get_frequency(ifname, buf))
 993         {
 994                 *buf = nl80211_freq2channel(*buf);
 995                 return 0;
 996         }
 997
 998         return -1;
 999 }
1000
1001
1002 int nl80211_get_txpower(const char *ifname, int *buf)
1003 {
1004 #if 0
1005         char *res;
1006         char path[PATH_MAX];
1007
1008         res = nl80211_ifname2phy(ifname);
1009         snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1010                  res ? res : ifname);
1011
1012         if ((*buf = nl80211_readint(path)) > -1)
1013                 return 0;
1014 #endif
1015
1016         return wext_get_txpower(ifname, buf);
1017 }
1018
1019
1020 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1021 {
1022         int8_t dbm;
1023         int16_t mbit;
1024         struct nl80211_rssi_rate *rr = arg;
1025         struct nlattr **attr = nl80211_parse(msg);
1026         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1027         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1028
1029         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1030                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1031                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1032                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1033                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1034                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1035                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1036                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1037                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1038                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1039                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1040         };
1041
1042         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1043                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1044                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1045                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1046                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1047         };
1048
1049         if (attr[NL80211_ATTR_STA_INFO])
1050         {
1051                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1052                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1053                 {
1054                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1055                         {
1056                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1057                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1058                         }
1059
1060                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1061                         {
1062                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1063                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1064                                                       rate_policy))
1065                                 {
1066                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1067                                         {
1068                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1069                                                 rr->rate = rr->rate
1070                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1071                                         }
1072                                 }
1073                         }
1074                 }
1075         }
1076
1077         return NL_SKIP;
1078 }
1079
1080 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1081 {
1082         DIR *d;
1083         struct dirent *de;
1084         struct nl80211_msg_conveyor *req;
1085
1086         r->rssi = 0;
1087         r->rate = 0;
1088
1089         if ((d = opendir("/sys/class/net")) != NULL)
1090         {
1091                 while ((de = readdir(d)) != NULL)
1092                 {
1093                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1094                             (!de->d_name[strlen(ifname)] ||
1095                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1096                         {
1097                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1098                                                   NLM_F_DUMP);
1099
1100                                 if (req)
1101                                 {
1102                                         nl80211_send(req, nl80211_fill_signal_cb, r);
1103                                         nl80211_free(req);
1104                                 }
1105                         }
1106                 }
1107
1108                 closedir(d);
1109         }
1110 }
1111
1112 int nl80211_get_bitrate(const char *ifname, int *buf)
1113 {
1114         struct nl80211_rssi_rate rr;
1115
1116         nl80211_fill_signal(ifname, &rr);
1117
1118         if (rr.rate)
1119         {
1120                 *buf = (rr.rate * 100);
1121                 return 0;
1122         }
1123
1124         return -1;
1125 }
1126
1127 int nl80211_get_signal(const char *ifname, int *buf)
1128 {
1129         struct nl80211_rssi_rate rr;
1130
1131         nl80211_fill_signal(ifname, &rr);
1132
1133         if (rr.rssi)
1134         {
1135                 *buf = rr.rssi;
1136                 return 0;
1137         }
1138
1139         return -1;
1140 }
1141
1142 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1143 {
1144         int8_t *noise = arg;
1145         struct nlattr **tb = nl80211_parse(msg);
1146         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1147
1148         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1149                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1150                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1151         };
1152
1153         if (!tb[NL80211_ATTR_SURVEY_INFO])
1154                 return NL_SKIP;
1155
1156         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1157                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1158                 return NL_SKIP;
1159
1160         if (!si[NL80211_SURVEY_INFO_NOISE])
1161                 return NL_SKIP;
1162
1163         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1164                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1165
1166         return NL_SKIP;
1167 }
1168
1169
1170 int nl80211_get_noise(const char *ifname, int *buf)
1171 {
1172         int8_t noise;
1173         struct nl80211_msg_conveyor *req;
1174
1175         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1176         if (req)
1177         {
1178                 noise = 0;
1179
1180                 nl80211_send(req, nl80211_get_noise_cb, &noise);
1181                 nl80211_free(req);
1182
1183                 if (noise)
1184                 {
1185                         *buf = noise;
1186                         return 0;
1187                 }
1188         }
1189
1190         return -1;
1191 }
1192
1193 int nl80211_get_quality(const char *ifname, int *buf)
1194 {
1195         int signal;
1196
1197         if (!nl80211_get_signal(ifname, &signal))
1198         {
1199                 /* A positive signal level is usually just a quality
1200                  * value, pass through as-is */
1201                 if (signal >= 0)
1202                 {
1203                         *buf = signal;
1204                 }
1205
1206                 /* The cfg80211 wext compat layer assumes a signal range
1207                  * of -110 dBm to -40 dBm, the quality value is derived
1208                  * by adding 110 to the signal level */
1209                 else
1210                 {
1211                         if (signal < -110)
1212                                 signal = -110;
1213                         else if (signal > -40)
1214                                 signal = -40;
1215
1216                         *buf = (signal + 110);
1217                 }
1218
1219                 return 0;
1220         }
1221
1222         return -1;
1223 }
1224
1225 int nl80211_get_quality_max(const char *ifname, int *buf)
1226 {
1227         /* The cfg80211 wext compat layer assumes a maximum
1228          * quality of 70 */
1229         *buf = 70;
1230
1231         return 0;
1232 }
1233
1234 int nl80211_get_encryption(const char *ifname, char *buf)
1235 {
1236         int i;
1237         char k[9];
1238         char *val, *res;
1239         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1240
1241         /* WPA supplicant */
1242         if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1243             (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1244         {
1245                 /* WEP */
1246                 if (strstr(val, "WEP"))
1247                 {
1248                         if (strstr(val, "WEP-40"))
1249                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1250
1251                         else if (strstr(val, "WEP-104"))
1252                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1253
1254                         c->enabled       = 1;
1255                         c->group_ciphers = c->pair_ciphers;
1256
1257                         c->auth_suites |= IWINFO_KMGMT_NONE;
1258                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1259                 }
1260
1261                 /* WPA */
1262                 else
1263                 {
1264                         if (strstr(val, "TKIP"))
1265                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1266
1267                         else if (strstr(val, "CCMP"))
1268                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1269
1270                         else if (strstr(val, "NONE"))
1271                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1272
1273                         else if (strstr(val, "WEP-40"))
1274                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1275
1276                         else if (strstr(val, "WEP-104"))
1277                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1278
1279
1280                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
1281                         {
1282                                 if (strstr(val, "TKIP"))
1283                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
1284
1285                                 else if (strstr(val, "CCMP"))
1286                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
1287
1288                                 else if (strstr(val, "NONE"))
1289                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
1290
1291                                 else if (strstr(val, "WEP-40"))
1292                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
1293
1294                                 else if (strstr(val, "WEP-104"))
1295                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
1296                         }
1297
1298
1299                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1300                         {
1301                                 if (strstr(val, "WPA2"))
1302                                         c->wpa_version = 2;
1303
1304                                 else if (strstr(val, "WPA"))
1305                                         c->wpa_version = 1;
1306
1307
1308                                 if (strstr(val, "PSK"))
1309                                         c->auth_suites |= IWINFO_KMGMT_PSK;
1310
1311                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1312                                         c->auth_suites |= IWINFO_KMGMT_8021x;
1313
1314                                 else if (strstr(val, "NONE"))
1315                                         c->auth_suites |= IWINFO_KMGMT_NONE;
1316                         }
1317
1318                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1319                 }
1320
1321                 return 0;
1322         }
1323
1324         /* Hostapd */
1325         else if ((res = nl80211_hostapd_info(ifname)))
1326         {
1327                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1328                         c->wpa_version = atoi(val);
1329
1330                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1331
1332                 if (!val || strstr(val, "PSK"))
1333                         c->auth_suites |= IWINFO_KMGMT_PSK;
1334
1335                 if (val && strstr(val, "EAP"))
1336                         c->auth_suites |= IWINFO_KMGMT_8021x;
1337
1338                 if (val && strstr(val, "NONE"))
1339                         c->auth_suites |= IWINFO_KMGMT_NONE;
1340
1341                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1342                 {
1343                         if (strstr(val, "TKIP"))
1344                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1345
1346                         if (strstr(val, "CCMP"))
1347                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1348
1349                         if (strstr(val, "NONE"))
1350                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1351                 }
1352
1353                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1354                 {
1355                         switch(atoi(val)) {
1356                                 case 1:
1357                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1358                                         break;
1359
1360                                 case 2:
1361                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1362                                         break;
1363
1364                                 case 3:
1365                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1366                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1367                                         break;
1368
1369                                 default:
1370                                         break;
1371                         }
1372
1373                         for (i = 0; i < 4; i++)
1374                         {
1375                                 snprintf(k, sizeof(k), "wep_key%d", i);
1376
1377                                 if ((val = nl80211_getval(ifname, res, k)))
1378                                 {
1379                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1380                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1381
1382                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1383                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1384                                 }
1385                         }
1386                 }
1387
1388                 c->group_ciphers = c->pair_ciphers;
1389                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1390
1391                 return 0;
1392         }
1393
1394         return -1;
1395 }
1396
1397
1398 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1399 {
1400         struct nl80211_array_buf *arr = arg;
1401         struct iwinfo_assoclist_entry *e = arr->buf;
1402         struct nlattr **attr = nl80211_parse(msg);
1403         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1404         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1405
1406         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1407                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1408                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1409                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1410                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1411                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1412                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1413         };
1414
1415         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1416                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1417                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1418                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1419                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1420         };
1421
1422         /* advance to end of array */
1423         e += arr->count;
1424         memset(e, 0, sizeof(*e));
1425
1426         if (attr[NL80211_ATTR_MAC])
1427                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1428
1429         if (attr[NL80211_ATTR_STA_INFO] &&
1430             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1431                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1432         {
1433                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1434                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1435
1436                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1437                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1438
1439                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1440                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1441
1442                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1443                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1444
1445                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1446                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1447                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1448                 {
1449                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1450                                 e->rx_rate.rate =
1451                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1452
1453                         if (rinfo[NL80211_RATE_INFO_MCS])
1454                                 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1455
1456                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1457                                 e->rx_rate.is_40mhz = 1;
1458
1459                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1460                                 e->rx_rate.is_short_gi = 1;
1461                 }
1462
1463                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1464                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1465                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1466                 {
1467                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1468                                 e->tx_rate.rate =
1469                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1470
1471                         if (rinfo[NL80211_RATE_INFO_MCS])
1472                                 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1473
1474                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1475                                 e->tx_rate.is_40mhz = 1;
1476
1477                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1478                                 e->tx_rate.is_short_gi = 1;
1479                 }
1480         }
1481
1482         e->noise = 0; /* filled in by caller */
1483         arr->count++;
1484
1485         return NL_SKIP;
1486 }
1487
1488 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1489 {
1490         DIR *d;
1491         int i, noise = 0;
1492         struct dirent *de;
1493         struct nl80211_msg_conveyor *req;
1494         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1495         struct iwinfo_assoclist_entry *e;
1496
1497         if ((d = opendir("/sys/class/net")) != NULL)
1498         {
1499                 while ((de = readdir(d)) != NULL)
1500                 {
1501                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1502                             (!de->d_name[strlen(ifname)] ||
1503                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1504                         {
1505                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1506                                                   NLM_F_DUMP);
1507
1508                                 if (req)
1509                                 {
1510                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1511                                         nl80211_free(req);
1512                                 }
1513                         }
1514                 }
1515
1516                 closedir(d);
1517
1518                 if (!nl80211_get_noise(ifname, &noise))
1519                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1520                                 e->noise = noise;
1521
1522                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1523                 return 0;
1524         }
1525
1526         return -1;
1527 }
1528
1529 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1530 {
1531         int *dbm_max = arg;
1532         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1533
1534         struct nlattr **attr = nl80211_parse(msg);
1535         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1536         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1537         struct nlattr *band, *freq;
1538
1539         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1540                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1541                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1542                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1543                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1544                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1545                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1546         };
1547
1548         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1549         *dbm_max = -1;
1550
1551         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1552         {
1553                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1554                           nla_len(band), NULL);
1555
1556                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1557                 {
1558                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1559                                   nla_data(freq), nla_len(freq), freq_policy);
1560
1561                         ch_cmp = nl80211_freq2channel(nla_get_u32(
1562                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1563
1564                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
1565                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1566                         {
1567                                 *dbm_max = (int)(0.01 * nla_get_u32(
1568                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1569
1570                                 break;
1571                         }
1572                 }
1573         }
1574
1575         return NL_SKIP;
1576 }
1577
1578 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1579 {
1580         int ch_cur;
1581         int dbm_max = -1, dbm_cur, dbm_cnt;
1582         struct nl80211_msg_conveyor *req;
1583         struct iwinfo_txpwrlist_entry entry;
1584
1585         if (nl80211_get_channel(ifname, &ch_cur))
1586                 ch_cur = 0;
1587
1588         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1589         if (req)
1590         {
1591                 /* initialize the value pointer with channel for callback */
1592                 dbm_max = ch_cur;
1593
1594                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1595                 nl80211_free(req);
1596         }
1597
1598         if (dbm_max > 0)
1599         {
1600                 for (dbm_cur = 0, dbm_cnt = 0;
1601                      dbm_cur < dbm_max;
1602                      dbm_cur++, dbm_cnt++)
1603                 {
1604                         entry.dbm = dbm_cur;
1605                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1606
1607                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1608                 }
1609
1610                 entry.dbm = dbm_max;
1611                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1612
1613                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1614                 dbm_cnt++;
1615
1616                 *len = dbm_cnt * sizeof(entry);
1617                 return 0;
1618         }
1619
1620         return -1;
1621 }
1622
1623 static void nl80211_get_scancrypto(const char *spec,
1624         struct iwinfo_crypto_entry *c)
1625 {
1626         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1627         {
1628                 c->enabled = 1;
1629
1630                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1631                         c->wpa_version = 3;
1632
1633                 else if (strstr(spec, "WPA2"))
1634                         c->wpa_version = 2;
1635
1636                 else if (strstr(spec, "WPA"))
1637                         c->wpa_version = 1;
1638
1639                 else if (strstr(spec, "WEP"))
1640                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1641
1642
1643                 if (strstr(spec, "PSK"))
1644                         c->auth_suites |= IWINFO_KMGMT_PSK;
1645
1646                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1647                         c->auth_suites |= IWINFO_KMGMT_8021x;
1648
1649                 if (strstr(spec, "WPA-NONE"))
1650                         c->auth_suites |= IWINFO_KMGMT_NONE;
1651
1652
1653                 if (strstr(spec, "TKIP"))
1654                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1655
1656                 if (strstr(spec, "CCMP"))
1657                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1658
1659                 if (strstr(spec, "WEP-40"))
1660                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1661
1662                 if (strstr(spec, "WEP-104"))
1663                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1664
1665                 c->group_ciphers = c->pair_ciphers;
1666         }
1667         else
1668         {
1669                 c->enabled = 0;
1670         }
1671 }
1672
1673
1674 struct nl80211_scanlist {
1675         struct iwinfo_scanlist_entry *e;
1676         int len;
1677 };
1678
1679
1680 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1681                                     struct iwinfo_scanlist_entry *e)
1682 {
1683         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1684         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1685         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1686
1687         while (ielen >= 2 && ielen >= ie[1])
1688         {
1689                 switch (ie[0])
1690                 {
1691                 case 0: /* SSID */
1692                         memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1693                         break;
1694
1695                 case 48: /* RSN */
1696                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1697                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1698                         break;
1699
1700                 case 221: /* Vendor */
1701                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1702                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1703                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1704                         break;
1705                 }
1706
1707                 ielen -= ie[1] + 2;
1708                 ie += ie[1] + 2;
1709         }
1710 }
1711
1712 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1713 {
1714         int8_t rssi;
1715         uint16_t caps;
1716
1717         struct nl80211_scanlist *sl = arg;
1718         struct nlattr **tb = nl80211_parse(msg);
1719         struct nlattr *bss[NL80211_BSS_MAX + 1];
1720
1721         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1722                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
1723                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
1724                 [NL80211_BSS_BSSID]                = {                 },
1725                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
1726                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
1727                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
1728                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
1729                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
1730                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
1731                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
1732                 [NL80211_BSS_BEACON_IES]           = {                 },
1733         };
1734
1735         if (!tb[NL80211_ATTR_BSS] ||
1736                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1737                                  bss_policy) ||
1738                 !bss[NL80211_BSS_BSSID])
1739         {
1740                 return NL_SKIP;
1741         }
1742
1743         if (bss[NL80211_BSS_CAPABILITY])
1744                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1745         else
1746                 caps = 0;
1747
1748         memset(sl->e, 0, sizeof(*sl->e));
1749         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1750
1751         if (caps & (1<<1))
1752                 sl->e->mode = IWINFO_OPMODE_ADHOC;
1753         else
1754                 sl->e->mode = IWINFO_OPMODE_MASTER;
1755
1756         if (caps & (1<<4))
1757                 sl->e->crypto.enabled = 1;
1758
1759         if (bss[NL80211_BSS_FREQUENCY])
1760                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1761                         bss[NL80211_BSS_FREQUENCY]));
1762
1763         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1764                 nl80211_get_scanlist_ie(bss, sl->e);
1765
1766         if (bss[NL80211_BSS_SIGNAL_MBM])
1767         {
1768                 sl->e->signal =
1769                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1770
1771                 rssi = sl->e->signal - 0x100;
1772
1773                 if (rssi < -110)
1774                         rssi = -110;
1775                 else if (rssi > -40)
1776                         rssi = -40;
1777
1778                 sl->e->quality = (rssi + 110);
1779                 sl->e->quality_max = 70;
1780         }
1781
1782         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1783         {
1784                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1785                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1786         }
1787
1788         sl->e++;
1789         sl->len++;
1790
1791         return NL_SKIP;
1792 }
1793
1794 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1795 {
1796         struct nl80211_msg_conveyor *req;
1797         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1798
1799         req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1800         if (req)
1801         {
1802                 nl80211_send(req, NULL, NULL);
1803                 nl80211_free(req);
1804         }
1805
1806         nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1807
1808         req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1809         if (req)
1810         {
1811                 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1812                 nl80211_free(req);
1813         }
1814
1815         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1816         return *len ? 0 : -1;
1817 }
1818
1819 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1820 {
1821         int freq, rssi, qmax, count;
1822         char *res;
1823         char ssid[128] = { 0 };
1824         char bssid[18] = { 0 };
1825         char cipher[256] = { 0 };
1826
1827         /* Got a radioX pseudo interface, find some interface on it or create one */
1828         if (!strncmp(ifname, "radio", 5))
1829         {
1830                 /* Reuse existing interface */
1831                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1832                 {
1833                         return nl80211_get_scanlist(res, buf, len);
1834                 }
1835
1836                 /* Need to spawn a temporary iface for scanning */
1837                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1838                 {
1839                         count = nl80211_get_scanlist(res, buf, len);
1840                         nl80211_ifdel(res);
1841                         return count;
1842                 }
1843         }
1844
1845         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1846
1847         /* WPA supplicant */
1848         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1849         {
1850                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1851                 {
1852                         nl80211_get_quality_max(ifname, &qmax);
1853
1854                         /* skip header line */
1855                         while (*res++ != '\n');
1856
1857                         count = 0;
1858
1859                         while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1860                                       bssid, &freq, &rssi, cipher, ssid) > 0)
1861                         {
1862                                 /* BSSID */
1863                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1864                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1865                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1866                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1867                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1868                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1869
1870                                 /* SSID */
1871                                 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1872
1873                                 /* Mode (assume master) */
1874                                 e->mode = IWINFO_OPMODE_MASTER;
1875
1876                                 /* Channel */
1877                                 e->channel = nl80211_freq2channel(freq);
1878
1879                                 /* Signal */
1880                                 e->signal = rssi;
1881
1882                                 /* Quality */
1883                                 if (rssi < 0)
1884                                 {
1885                                         /* The cfg80211 wext compat layer assumes a signal range
1886                                          * of -110 dBm to -40 dBm, the quality value is derived
1887                                          * by adding 110 to the signal level */
1888                                         if (rssi < -110)
1889                                                 rssi = -110;
1890                                         else if (rssi > -40)
1891                                                 rssi = -40;
1892
1893                                         e->quality = (rssi + 110);
1894                                 }
1895                                 else
1896                                 {
1897                                         e->quality = rssi;
1898                                 }
1899
1900                                 /* Max. Quality */
1901                                 e->quality_max = qmax;
1902
1903                                 /* Crypto */
1904                                 nl80211_get_scancrypto(cipher, &e->crypto);
1905
1906                                 /* advance to next line */
1907                                 while (*res && *res++ != '\n');
1908
1909                                 count++;
1910                                 e++;
1911
1912                                 memset(ssid, 0, sizeof(ssid));
1913                                 memset(bssid, 0, sizeof(bssid));
1914                                 memset(cipher, 0, sizeof(cipher));
1915                         }
1916
1917                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1918                         return 0;
1919                 }
1920         }
1921
1922         /* AP scan */
1923         else
1924         {
1925                 /* Got a temp interface, don't create yet another one */
1926                 if (!strncmp(ifname, "tmp.", 4))
1927                 {
1928                         if (!iwinfo_ifup(ifname))
1929                                 return -1;
1930
1931                         nl80211_get_scanlist_nl(ifname, buf, len);
1932                         iwinfo_ifdown(ifname);
1933                         return 0;
1934                 }
1935
1936                 /* Spawn a new scan interface */
1937                 else
1938                 {
1939                         if (!(res = nl80211_ifadd(ifname)))
1940                                 goto out;
1941
1942                         if (!iwinfo_ifmac(res))
1943                                 goto out;
1944
1945                         /* if we can take the new interface up, the driver supports an
1946                          * additional interface and there's no need to tear down the ap */
1947                         if (iwinfo_ifup(res))
1948                         {
1949                                 nl80211_get_scanlist_nl(res, buf, len);
1950                                 iwinfo_ifdown(res);
1951                         }
1952
1953                         /* driver cannot create secondary interface, take down ap
1954                          * during scan */
1955                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1956                         {
1957                                 nl80211_get_scanlist_nl(res, buf, len);
1958                                 iwinfo_ifdown(res);
1959                                 iwinfo_ifup(ifname);
1960                                 nl80211_hostapd_hup(ifname);
1961                         }
1962
1963                 out:
1964                         nl80211_ifdel(res);
1965                         return 0;
1966                 }
1967         }
1968
1969         return -1;
1970 }
1971
1972 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1973 {
1974         int bands_remain, freqs_remain;
1975
1976         struct nl80211_array_buf *arr = arg;
1977         struct iwinfo_freqlist_entry *e = arr->buf;
1978
1979         struct nlattr **attr = nl80211_parse(msg);
1980         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1981         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1982         struct nlattr *band, *freq;
1983
1984         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1985                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1986                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1987                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1988                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1989                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1990                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1991         };
1992
1993         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1994         {
1995                 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1996                           nla_data(band), nla_len(band), NULL);
1997
1998                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1999                 {
2000                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2001                                   nla_data(freq), nla_len(freq), NULL);
2002
2003                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2004                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2005                                 continue;
2006
2007                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2008                         e->channel = nl80211_freq2channel(e->mhz);
2009
2010                         e->restricted = (
2011                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2012                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
2013                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2014                         ) ? 1 : 0;
2015
2016                         e++;
2017                         arr->count++;
2018                 }
2019         }
2020
2021         return NL_SKIP;
2022 }
2023
2024 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2025 {
2026         struct nl80211_msg_conveyor *req;
2027         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2028
2029         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2030         if (req)
2031         {
2032                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2033                 nl80211_free(req);
2034         }
2035
2036         if (arr.count > 0)
2037         {
2038                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2039                 return 0;
2040         }
2041
2042         return -1;
2043 }
2044
2045 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2046 {
2047         char *buf = arg;
2048         struct nlattr **attr = nl80211_parse(msg);
2049
2050         if (attr[NL80211_ATTR_REG_ALPHA2])
2051                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2052         else
2053                 buf[0] = 0;
2054
2055         return NL_SKIP;
2056 }
2057
2058 int nl80211_get_country(const char *ifname, char *buf)
2059 {
2060         int rv = -1;
2061         struct nl80211_msg_conveyor *req;
2062
2063         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2064         if (req)
2065         {
2066                 nl80211_send(req, nl80211_get_country_cb, buf);
2067                 nl80211_free(req);
2068
2069                 if (buf[0])
2070                         rv = 0;
2071         }
2072
2073         return rv;
2074 }
2075
2076 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2077 {
2078         int i, count;
2079         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2080         const struct iwinfo_iso3166_label *l;
2081
2082         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2083         {
2084                 e->iso3166 = l->iso3166;
2085                 e->ccode[0] = (l->iso3166 / 256);
2086                 e->ccode[1] = (l->iso3166 % 256);
2087         }
2088
2089         *len = (count * sizeof(struct iwinfo_country_entry));
2090         return 0;
2091 }
2092
2093 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2094 {
2095         int *modes = arg;
2096         int bands_remain, freqs_remain;
2097         uint16_t caps = 0;
2098         struct nlattr **attr = nl80211_parse(msg);
2099         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2100         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2101         struct nlattr *band, *freq;
2102
2103         *modes = 0;
2104
2105         if (attr[NL80211_ATTR_WIPHY_BANDS])
2106         {
2107                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2108                 {
2109                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2110                                   nla_data(band), nla_len(band), NULL);
2111
2112                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2113                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2114
2115                         /* Treat any nonzero capability as 11n */
2116                         if (caps > 0)
2117                                 *modes |= IWINFO_80211_N;
2118
2119                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2120                                             freqs_remain)
2121                         {
2122                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2123                                           nla_data(freq), nla_len(freq), NULL);
2124
2125                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2126                                         continue;
2127
2128                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2129                                 {
2130                                         *modes |= IWINFO_80211_B;
2131                                         *modes |= IWINFO_80211_G;
2132                                 }
2133                                 else
2134                                 {
2135                                         *modes |= IWINFO_80211_A;
2136                                 }
2137                         }
2138                 }
2139         }
2140
2141         return NL_SKIP;
2142 }
2143
2144 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2145 {
2146         struct nl80211_msg_conveyor *req;
2147
2148         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2149         if (req)
2150         {
2151                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2152                 nl80211_free(req);
2153         }
2154
2155         return *buf ? 0 : -1;
2156 }
2157
2158 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2159 {
2160         /* Test whether we can create another interface */
2161         char *nif = nl80211_ifadd(ifname);
2162
2163         if (nif)
2164         {
2165                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2166
2167                 iwinfo_ifdown(nif);
2168                 nl80211_ifdel(nif);
2169
2170                 return 0;
2171         }
2172
2173         return -1;
2174 }
2175
2176 int nl80211_get_hardware_id(const char *ifname, char *buf)
2177 {
2178         int rv;
2179         char *res;
2180
2181         /* Got a radioX pseudo interface, find some interface on it or create one */
2182         if (!strncmp(ifname, "radio", 5))
2183         {
2184                 /* Reuse existing interface */
2185                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2186                 {
2187                         rv = wext_get_hardware_id(res, buf);
2188                 }
2189
2190                 /* Need to spawn a temporary iface for finding IDs */
2191                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2192                 {
2193                         rv = wext_get_hardware_id(res, buf);
2194                         nl80211_ifdel(res);
2195                 }
2196         }
2197         else
2198         {
2199                 rv = wext_get_hardware_id(ifname, buf);
2200         }
2201
2202         /* Failed to obtain hardware IDs, search board config */
2203         if (rv)
2204         {
2205                 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2206         }
2207
2208         return rv;
2209 }
2210
2211 static const struct iwinfo_hardware_entry *
2212 nl80211_get_hardware_entry(const char *ifname)
2213 {
2214         struct iwinfo_hardware_id id;
2215
2216         if (nl80211_get_hardware_id(ifname, (char *)&id))
2217                 return NULL;
2218
2219         return iwinfo_hardware(&id);
2220 }
2221
2222 int nl80211_get_hardware_name(const char *ifname, char *buf)
2223 {
2224         const struct iwinfo_hardware_entry *hw;
2225
2226         if (!(hw = nl80211_get_hardware_entry(ifname)))
2227                 sprintf(buf, "Generic MAC80211");
2228         else
2229                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2230
2231         return 0;
2232 }
2233
2234 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2235 {
2236         const struct iwinfo_hardware_entry *hw;
2237
2238         if (!(hw = nl80211_get_hardware_entry(ifname)))
2239                 return -1;
2240
2241         *buf = hw->txpower_offset;
2242         return 0;
2243 }
2244
2245 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2246 {
2247         const struct iwinfo_hardware_entry *hw;
2248
2249         if (!(hw = nl80211_get_hardware_entry(ifname)))
2250                 return -1;
2251
2252         *buf = hw->frequency_offset;
2253         return 0;
2254 }