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         {
 530                 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
 531                         "/var/run/wpa_supplicant/%s", ifname);
 532
 533                 if (connect(sock, (struct sockaddr *) &remote, remote_length))
 534                         goto out;
 535         }
 536
 537         local.sun_family = AF_UNIX;
 538         local_length = sizeof(local.sun_family) +
 539                 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
 540
 541         if (bind(sock, (struct sockaddr *) &local, local_length))
 542                 goto out;
 543
 544
 545         if (event)
 546         {
 547                 send(sock, "ATTACH", 6, 0);
 548
 549                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
 550                         goto out;
 551         }
 552
 553
 554         send(sock, cmd, strlen(cmd), 0);
 555
 556         /* we might have to scan up to 72 channels / 256ms per channel */
 557         /* this makes up to 18.5s hence 10 tries */
 558         while( numtry++ < 10 )
 559         {
 560                 char *bracket;
 561
 562                 /* make sure there is a terminating nul byte */
 563                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
 564                 {
 565                         if (event)
 566                                 continue;
 567
 568                         break;
 569                 }
 570
 571                 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
 572                         break;
 573
 574                 /* there may be more than max(numtry) BSS-ADDED events */
 575                 /* ignore them similar to wpa_cli */
 576                 if (buffer[0] == '<' &&
 577                                 (bracket=strchr(buffer,'>')) != NULL &&
 578                                 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
 579                         numtry--;
 580         }
 581
 582         rv = buffer;
 583
 584 out:
 585         close(sock);
 586
 587         if (local.sun_family)
 588                 unlink(local.sun_path);
 589
 590         return rv;
 591 }
 592
 593 static inline int nl80211_readint(const char *path)
 594 {
 595         int fd;
 596         int rv = -1;
 597         char buffer[16];
 598
 599         if ((fd = open(path, O_RDONLY)) > -1)
 600         {
 601                 if (read(fd, buffer, sizeof(buffer)) > 0)
 602                         rv = atoi(buffer);
 603
 604                 close(fd);
 605         }
 606
 607         return rv;
 608 }
 609
 610 static char * nl80211_phy2ifname(const char *ifname)
 611 {
 612         int fd, ifidx = -1, cifidx = -1, phyidx = -1;
 613         char buffer[64];
 614         static char nif[IFNAMSIZ] = { 0 };
 615
 616         DIR *d;
 617         struct dirent *e;
 618
 619         if (!ifname)
 620                 return NULL;
 621         else if (!strncmp(ifname, "phy", 3))
 622                 phyidx = atoi(&ifname[3]);
 623         else if (!strncmp(ifname, "radio", 5))
 624                 phyidx = atoi(&ifname[5]);
 625
 626         memset(nif, 0, sizeof(nif));
 627
 628         if (phyidx > -1)
 629         {
 630                 if ((d = opendir("/sys/class/net")) != NULL)
 631                 {
 632                         while ((e = readdir(d)) != NULL)
 633                         {
 634                                 snprintf(buffer, sizeof(buffer),
 635                                          "/sys/class/net/%s/phy80211/index", e->d_name);
 636
 637                                 if (nl80211_readint(buffer) == phyidx)
 638                                 {
 639                                         snprintf(buffer, sizeof(buffer),
 640                                                  "/sys/class/net/%s/ifindex", e->d_name);
 641
 642                                         if ((cifidx = nl80211_readint(buffer)) >= 0 &&
 643                                             ((ifidx < 0) || (cifidx < ifidx)))
 644                                         {
 645                                                 ifidx = cifidx;
 646                                                 strncpy(nif, e->d_name, sizeof(nif));
 647                                         }
 648                                 }
 649                         }
 650
 651                         closedir(d);
 652                 }
 653         }
 654
 655         return nif[0] ? nif : NULL;
 656 }
 657
 658 static char * nl80211_ifadd(const char *ifname)
 659 {
 660         int phyidx;
 661         char *rv = NULL;
 662         static char nif[IFNAMSIZ] = { 0 };
 663         struct nl80211_msg_conveyor *req, *res;
 664
 665         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 666         if (req)
 667         {
 668                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 669
 670                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 671                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 672
 673                 nl80211_send(req, NULL, NULL);
 674
 675                 rv = nif;
 676
 677         nla_put_failure:
 678                 nl80211_free(req);
 679         }
 680
 681         return rv;
 682 }
 683
 684 static void nl80211_ifdel(const char *ifname)
 685 {
 686         struct nl80211_msg_conveyor *req;
 687
 688         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 689         if (req)
 690         {
 691                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 692
 693                 nl80211_send(req, NULL, NULL);
 694
 695         nla_put_failure:
 696                 nl80211_free(req);
 697         }
 698 }
 699
 700 static void nl80211_hostapd_hup(const char *ifname)
 701 {
 702         int fd, pid = 0;
 703         char buf[32];
 704         char *phy = nl80211_ifname2phy(ifname);
 705
 706         if (phy)
 707         {
 708                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 709                 if ((fd = open(buf, O_RDONLY)) > 0)
 710                 {
 711                         if (read(fd, buf, sizeof(buf)) > 0)
 712                                 pid = atoi(buf);
 713
 714                         close(fd);
 715                 }
 716
 717                 if (pid > 0)
 718                         kill(pid, 1);
 719         }
 720 }
 721
 722
 723 int nl80211_probe(const char *ifname)
 724 {
 725         return !!nl80211_ifname2phy(ifname);
 726 }
 727
 728 void nl80211_close(void)
 729 {
 730         if (nls)
 731         {
 732                 if (nls->nlctrl)
 733                         genl_family_put(nls->nlctrl);
 734
 735                 if (nls->nl80211)
 736                         genl_family_put(nls->nl80211);
 737
 738                 if (nls->nl_sock)
 739                         nl_socket_free(nls->nl_sock);
 740
 741                 if (nls->nl_cache)
 742                         nl_cache_free(nls->nl_cache);
 743
 744                 free(nls);
 745                 nls = NULL;
 746         }
 747 }
 748
 749
 750 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
 751 {
 752         int *mode = arg;
 753         struct nlattr **tb = nl80211_parse(msg);
 754         const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
 755                 IWINFO_OPMODE_UNKNOWN,          /* unspecified */
 756                 IWINFO_OPMODE_ADHOC,            /* IBSS */
 757                 IWINFO_OPMODE_CLIENT,           /* managed */
 758                 IWINFO_OPMODE_MASTER,           /* AP */
 759                 IWINFO_OPMODE_AP_VLAN,          /* AP/VLAN */
 760                 IWINFO_OPMODE_WDS,                      /* WDS */
 761                 IWINFO_OPMODE_MONITOR,          /* monitor */
 762                 IWINFO_OPMODE_MESHPOINT,        /* mesh point */
 763                 IWINFO_OPMODE_P2P_CLIENT,       /* P2P-client */
 764                 IWINFO_OPMODE_P2P_GO,           /* P2P-GO */
 765         };
 766
 767         if (tb[NL80211_ATTR_IFTYPE])
 768                 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
 769
 770         return NL_SKIP;
 771 }
 772
 773 int nl80211_get_mode(const char *ifname, int *buf)
 774 {
 775         char *res;
 776         struct nl80211_msg_conveyor *req;
 777
 778         res = nl80211_phy2ifname(ifname);
 779         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 780         *buf = IWINFO_OPMODE_UNKNOWN;
 781
 782         if (req)
 783         {
 784                 nl80211_send(req, nl80211_get_mode_cb, buf);
 785                 nl80211_free(req);
 786         }
 787
 788         return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
 789 }
 790
 791
 792 struct nl80211_ssid_bssid {
 793         unsigned char *ssid;
 794         unsigned char bssid[7];
 795 };
 796
 797 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
 798 {
 799         int ielen;
 800         unsigned char *ie;
 801         struct nl80211_ssid_bssid *sb = arg;
 802         struct nlattr **tb = nl80211_parse(msg);
 803         struct nlattr *bss[NL80211_BSS_MAX + 1];
 804
 805         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 806                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
 807                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
 808         };
 809
 810         if (!tb[NL80211_ATTR_BSS] ||
 811             nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
 812                              bss_policy) ||
 813             !bss[NL80211_BSS_BSSID] ||
 814             !bss[NL80211_BSS_STATUS] ||
 815             !bss[NL80211_BSS_INFORMATION_ELEMENTS])
 816         {
 817                 return NL_SKIP;
 818         }
 819
 820         switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
 821         {
 822         case NL80211_BSS_STATUS_ASSOCIATED:
 823         case NL80211_BSS_STATUS_AUTHENTICATED:
 824         case NL80211_BSS_STATUS_IBSS_JOINED:
 825
 826                 if (sb->ssid)
 827                 {
 828                         ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
 829                         ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
 830
 831                         while (ielen >= 2 && ielen >= ie[1])
 832                         {
 833                                 if (ie[0] == 0)
 834                                 {
 835                                         memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
 836                                         return NL_SKIP;
 837                                 }
 838
 839                                 ielen -= ie[1] + 2;
 840                                 ie += ie[1] + 2;
 841                         }
 842                 }
 843                 else
 844                 {
 845                         sb->bssid[0] = 1;
 846                         memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
 847                         return NL_SKIP;
 848                 }
 849
 850         default:
 851                 return NL_SKIP;
 852         }
 853 }
 854
 855 int nl80211_get_ssid(const char *ifname, char *buf)
 856 {
 857         char *res;
 858         struct nl80211_msg_conveyor *req;
 859         struct nl80211_ssid_bssid sb;
 860
 861         /* try to find ssid from scan dump results */
 862         res = nl80211_phy2ifname(ifname);
 863         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
 864
 865         sb.ssid = buf;
 866         *buf = 0;
 867
 868         if (req)
 869         {
 870                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
 871                 nl80211_free(req);
 872         }
 873
 874         /* failed, try to find from hostapd info */
 875         if ((*buf == 0) &&
 876             (res = nl80211_hostapd_info(ifname)) &&
 877             (res = nl80211_getval(ifname, res, "ssid")))
 878         {
 879                 memcpy(buf, res, strlen(res));
 880         }
 881
 882         return (*buf == 0) ? -1 : 0;
 883 }
 884
 885 int nl80211_get_bssid(const char *ifname, char *buf)
 886 {
 887         char *res;
 888         struct nl80211_msg_conveyor *req;
 889         struct nl80211_ssid_bssid sb;
 890
 891         /* try to find bssid from scan dump results */
 892         res = nl80211_phy2ifname(ifname);
 893         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
 894
 895         sb.ssid = NULL;
 896         sb.bssid[0] = 0;
 897
 898         if (req)
 899         {
 900                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
 901                 nl80211_free(req);
 902         }
 903
 904         /* failed, try to find mac from hostapd info */
 905         if ((sb.bssid[0] == 0) &&
 906             (res = nl80211_hostapd_info(ifname)) &&
 907             (res = nl80211_getval(ifname, res, "bssid")))
 908         {
 909                 sb.bssid[0] = 1;
 910                 sb.bssid[1] = strtol(&res[0],  NULL, 16);
 911                 sb.bssid[2] = strtol(&res[3],  NULL, 16);
 912                 sb.bssid[3] = strtol(&res[6],  NULL, 16);
 913                 sb.bssid[4] = strtol(&res[9],  NULL, 16);
 914                 sb.bssid[5] = strtol(&res[12], NULL, 16);
 915                 sb.bssid[6] = strtol(&res[15], NULL, 16);
 916         }
 917
 918         if (sb.bssid[0])
 919         {
 920                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 921                         sb.bssid[1], sb.bssid[2], sb.bssid[3],
 922                         sb.bssid[4], sb.bssid[5], sb.bssid[6]);
 923
 924                 return 0;
 925         }
 926
 927         return -1;
 928 }
 929
 930
 931 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
 932 {
 933         int *freq = arg;
 934         struct nlattr **attr = nl80211_parse(msg);
 935         struct nlattr *binfo[NL80211_BSS_MAX + 1];
 936
 937         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
 938                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
 939                 [NL80211_BSS_STATUS]    = { .type = NLA_U32 },
 940         };
 941
 942         if (attr[NL80211_ATTR_BSS] &&
 943             !nla_parse_nested(binfo, NL80211_BSS_MAX,
 944                               attr[NL80211_ATTR_BSS], bss_policy))
 945         {
 946                 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
 947                         *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
 948         }
 949
 950         return NL_SKIP;
 951 }
 952
 953 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
 954 {
 955         int *freq = arg;
 956         struct nlattr **tb = nl80211_parse(msg);
 957
 958         if (tb[NL80211_ATTR_WIPHY_FREQ])
 959                 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 960
 961         return NL_SKIP;
 962 }
 963
 964 int nl80211_get_frequency(const char *ifname, int *buf)
 965 {
 966         int chn;
 967         char *res, *channel;
 968         struct nl80211_msg_conveyor *req;
 969
 970         /* try to find frequency from interface info */
 971         res = nl80211_phy2ifname(ifname);
 972         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
 973         *buf = 0;
 974
 975         if (req)
 976         {
 977                 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
 978                 nl80211_free(req);
 979         }
 980
 981         /* failed, try to find frequency from hostapd info */
 982         if ((*buf == 0) &&
 983             (res = nl80211_hostapd_info(ifname)) &&
 984             (channel = nl80211_getval(NULL, res, "channel")))
 985         {
 986                 chn = atoi(channel);
 987                 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
 988         }
 989         else
 990         {
 991                 /* failed, try to find frequency from scan results */
 992                 if (*buf == 0)
 993                 {
 994                         res = nl80211_phy2ifname(ifname);
 995                         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
 996                                           NLM_F_DUMP);
 997
 998                         if (req)
 999                         {
1000                                 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1001                                 nl80211_free(req);
1002                         }
1003                 }
1004         }
1005
1006         return (*buf == 0) ? -1 : 0;
1007 }
1008
1009 int nl80211_get_channel(const char *ifname, int *buf)
1010 {
1011         if (!nl80211_get_frequency(ifname, buf))
1012         {
1013                 *buf = nl80211_freq2channel(*buf);
1014                 return 0;
1015         }
1016
1017         return -1;
1018 }
1019
1020
1021 int nl80211_get_txpower(const char *ifname, int *buf)
1022 {
1023 #if 0
1024         char *res;
1025         char path[PATH_MAX];
1026
1027         res = nl80211_ifname2phy(ifname);
1028         snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1029                  res ? res : ifname);
1030
1031         if ((*buf = nl80211_readint(path)) > -1)
1032                 return 0;
1033 #endif
1034
1035         return wext_get_txpower(ifname, buf);
1036 }
1037
1038
1039 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1040 {
1041         int8_t dbm;
1042         int16_t mbit;
1043         struct nl80211_rssi_rate *rr = arg;
1044         struct nlattr **attr = nl80211_parse(msg);
1045         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1046         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1047
1048         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1049                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1050                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1051                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1052                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1053                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1054                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1055                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1056                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1057                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1058                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1059         };
1060
1061         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1062                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1063                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1064                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1065                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1066         };
1067
1068         if (attr[NL80211_ATTR_STA_INFO])
1069         {
1070                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1071                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1072                 {
1073                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1074                         {
1075                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1076                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1077                         }
1078
1079                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1080                         {
1081                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1082                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1083                                                       rate_policy))
1084                                 {
1085                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1086                                         {
1087                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1088                                                 rr->rate = rr->rate
1089                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1090                                         }
1091                                 }
1092                         }
1093                 }
1094         }
1095
1096         return NL_SKIP;
1097 }
1098
1099 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1100 {
1101         DIR *d;
1102         struct dirent *de;
1103         struct nl80211_msg_conveyor *req;
1104
1105         r->rssi = 0;
1106         r->rate = 0;
1107
1108         if ((d = opendir("/sys/class/net")) != NULL)
1109         {
1110                 while ((de = readdir(d)) != NULL)
1111                 {
1112                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1113                             (!de->d_name[strlen(ifname)] ||
1114                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1115                         {
1116                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1117                                                   NLM_F_DUMP);
1118
1119                                 if (req)
1120                                 {
1121                                         nl80211_send(req, nl80211_fill_signal_cb, r);
1122                                         nl80211_free(req);
1123                                 }
1124                         }
1125                 }
1126
1127                 closedir(d);
1128         }
1129 }
1130
1131 int nl80211_get_bitrate(const char *ifname, int *buf)
1132 {
1133         struct nl80211_rssi_rate rr;
1134
1135         nl80211_fill_signal(ifname, &rr);
1136
1137         if (rr.rate)
1138         {
1139                 *buf = (rr.rate * 100);
1140                 return 0;
1141         }
1142
1143         return -1;
1144 }
1145
1146 int nl80211_get_signal(const char *ifname, int *buf)
1147 {
1148         struct nl80211_rssi_rate rr;
1149
1150         nl80211_fill_signal(ifname, &rr);
1151
1152         if (rr.rssi)
1153         {
1154                 *buf = rr.rssi;
1155                 return 0;
1156         }
1157
1158         return -1;
1159 }
1160
1161 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1162 {
1163         int8_t *noise = arg;
1164         struct nlattr **tb = nl80211_parse(msg);
1165         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1166
1167         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1168                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1169                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1170         };
1171
1172         if (!tb[NL80211_ATTR_SURVEY_INFO])
1173                 return NL_SKIP;
1174
1175         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1176                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1177                 return NL_SKIP;
1178
1179         if (!si[NL80211_SURVEY_INFO_NOISE])
1180                 return NL_SKIP;
1181
1182         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1183                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1184
1185         return NL_SKIP;
1186 }
1187
1188
1189 int nl80211_get_noise(const char *ifname, int *buf)
1190 {
1191         int8_t noise;
1192         struct nl80211_msg_conveyor *req;
1193
1194         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1195         if (req)
1196         {
1197                 noise = 0;
1198
1199                 nl80211_send(req, nl80211_get_noise_cb, &noise);
1200                 nl80211_free(req);
1201
1202                 if (noise)
1203                 {
1204                         *buf = noise;
1205                         return 0;
1206                 }
1207         }
1208
1209         return -1;
1210 }
1211
1212 int nl80211_get_quality(const char *ifname, int *buf)
1213 {
1214         int signal;
1215
1216         if (!nl80211_get_signal(ifname, &signal))
1217         {
1218                 /* A positive signal level is usually just a quality
1219                  * value, pass through as-is */
1220                 if (signal >= 0)
1221                 {
1222                         *buf = signal;
1223                 }
1224
1225                 /* The cfg80211 wext compat layer assumes a signal range
1226                  * of -110 dBm to -40 dBm, the quality value is derived
1227                  * by adding 110 to the signal level */
1228                 else
1229                 {
1230                         if (signal < -110)
1231                                 signal = -110;
1232                         else if (signal > -40)
1233                                 signal = -40;
1234
1235                         *buf = (signal + 110);
1236                 }
1237
1238                 return 0;
1239         }
1240
1241         return -1;
1242 }
1243
1244 int nl80211_get_quality_max(const char *ifname, int *buf)
1245 {
1246         /* The cfg80211 wext compat layer assumes a maximum
1247          * quality of 70 */
1248         *buf = 70;
1249
1250         return 0;
1251 }
1252
1253 int nl80211_get_encryption(const char *ifname, char *buf)
1254 {
1255         int i;
1256         char k[9];
1257         char *val, *res;
1258         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1259
1260         /* WPA supplicant */
1261         if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1262             (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1263         {
1264                 /* WEP */
1265                 if (strstr(val, "WEP"))
1266                 {
1267                         if (strstr(val, "WEP-40"))
1268                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1269
1270                         else if (strstr(val, "WEP-104"))
1271                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1272
1273                         c->enabled       = 1;
1274                         c->group_ciphers = c->pair_ciphers;
1275
1276                         c->auth_suites |= IWINFO_KMGMT_NONE;
1277                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1278                 }
1279
1280                 /* WPA */
1281                 else
1282                 {
1283                         if (strstr(val, "TKIP"))
1284                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1285
1286                         else if (strstr(val, "CCMP"))
1287                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1288
1289                         else if (strstr(val, "NONE"))
1290                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1291
1292                         else if (strstr(val, "WEP-40"))
1293                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1294
1295                         else if (strstr(val, "WEP-104"))
1296                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1297
1298
1299                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
1300                         {
1301                                 if (strstr(val, "TKIP"))
1302                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
1303
1304                                 else if (strstr(val, "CCMP"))
1305                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
1306
1307                                 else if (strstr(val, "NONE"))
1308                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
1309
1310                                 else if (strstr(val, "WEP-40"))
1311                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
1312
1313                                 else if (strstr(val, "WEP-104"))
1314                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
1315                         }
1316
1317
1318                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1319                         {
1320                                 if (strstr(val, "WPA2"))
1321                                         c->wpa_version = 2;
1322
1323                                 else if (strstr(val, "WPA"))
1324                                         c->wpa_version = 1;
1325
1326
1327                                 if (strstr(val, "PSK"))
1328                                         c->auth_suites |= IWINFO_KMGMT_PSK;
1329
1330                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1331                                         c->auth_suites |= IWINFO_KMGMT_8021x;
1332
1333                                 else if (strstr(val, "NONE"))
1334                                         c->auth_suites |= IWINFO_KMGMT_NONE;
1335                         }
1336
1337                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1338                 }
1339
1340                 return 0;
1341         }
1342
1343         /* Hostapd */
1344         else if ((res = nl80211_hostapd_info(ifname)))
1345         {
1346                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1347                         c->wpa_version = atoi(val);
1348
1349                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1350
1351                 if (!val || strstr(val, "PSK"))
1352                         c->auth_suites |= IWINFO_KMGMT_PSK;
1353
1354                 if (val && strstr(val, "EAP"))
1355                         c->auth_suites |= IWINFO_KMGMT_8021x;
1356
1357                 if (val && strstr(val, "NONE"))
1358                         c->auth_suites |= IWINFO_KMGMT_NONE;
1359
1360                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1361                 {
1362                         if (strstr(val, "TKIP"))
1363                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1364
1365                         if (strstr(val, "CCMP"))
1366                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1367
1368                         if (strstr(val, "NONE"))
1369                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1370                 }
1371
1372                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1373                 {
1374                         switch(atoi(val)) {
1375                                 case 1:
1376                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1377                                         break;
1378
1379                                 case 2:
1380                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1381                                         break;
1382
1383                                 case 3:
1384                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1385                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1386                                         break;
1387
1388                                 default:
1389                                         break;
1390                         }
1391
1392                         for (i = 0; i < 4; i++)
1393                         {
1394                                 snprintf(k, sizeof(k), "wep_key%d", i);
1395
1396                                 if ((val = nl80211_getval(ifname, res, k)))
1397                                 {
1398                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1399                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1400
1401                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1402                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1403                                 }
1404                         }
1405                 }
1406
1407                 c->group_ciphers = c->pair_ciphers;
1408                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1409
1410                 return 0;
1411         }
1412
1413         return -1;
1414 }
1415
1416 int nl80211_get_phyname(const char *ifname, char *buf)
1417 {
1418         const char *name;
1419
1420         name = nl80211_ifname2phy(ifname);
1421
1422         if (name)
1423         {
1424                 strcpy(buf, name);
1425                 return 0;
1426         }
1427         else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1428         {
1429                 name = nl80211_ifname2phy(name);
1430
1431                 if (name)
1432                 {
1433                         strcpy(buf, ifname);
1434                         return 0;
1435                 }
1436         }
1437
1438         return -1;
1439 }
1440
1441
1442 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1443 {
1444         struct nl80211_array_buf *arr = arg;
1445         struct iwinfo_assoclist_entry *e = arr->buf;
1446         struct nlattr **attr = nl80211_parse(msg);
1447         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1448         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1449
1450         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1451                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1452                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1453                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1454                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1455                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1456                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1457         };
1458
1459         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1460                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1461                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1462                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1463                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1464         };
1465
1466         /* advance to end of array */
1467         e += arr->count;
1468         memset(e, 0, sizeof(*e));
1469
1470         if (attr[NL80211_ATTR_MAC])
1471                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1472
1473         if (attr[NL80211_ATTR_STA_INFO] &&
1474             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1475                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1476         {
1477                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1478                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1479
1480                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1481                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1482
1483                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1484                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1485
1486                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1487                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1488
1489                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1490                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1491                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1492                 {
1493                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1494                                 e->rx_rate.rate =
1495                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1496
1497                         if (rinfo[NL80211_RATE_INFO_MCS])
1498                                 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1499
1500                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1501                                 e->rx_rate.is_40mhz = 1;
1502
1503                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1504                                 e->rx_rate.is_short_gi = 1;
1505                 }
1506
1507                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1508                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1509                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1510                 {
1511                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1512                                 e->tx_rate.rate =
1513                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1514
1515                         if (rinfo[NL80211_RATE_INFO_MCS])
1516                                 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1517
1518                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1519                                 e->tx_rate.is_40mhz = 1;
1520
1521                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1522                                 e->tx_rate.is_short_gi = 1;
1523                 }
1524         }
1525
1526         e->noise = 0; /* filled in by caller */
1527         arr->count++;
1528
1529         return NL_SKIP;
1530 }
1531
1532 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1533 {
1534         DIR *d;
1535         int i, noise = 0;
1536         struct dirent *de;
1537         struct nl80211_msg_conveyor *req;
1538         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1539         struct iwinfo_assoclist_entry *e;
1540
1541         if ((d = opendir("/sys/class/net")) != NULL)
1542         {
1543                 while ((de = readdir(d)) != NULL)
1544                 {
1545                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1546                             (!de->d_name[strlen(ifname)] ||
1547                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1548                         {
1549                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1550                                                   NLM_F_DUMP);
1551
1552                                 if (req)
1553                                 {
1554                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1555                                         nl80211_free(req);
1556                                 }
1557                         }
1558                 }
1559
1560                 closedir(d);
1561
1562                 if (!nl80211_get_noise(ifname, &noise))
1563                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1564                                 e->noise = noise;
1565
1566                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1567                 return 0;
1568         }
1569
1570         return -1;
1571 }
1572
1573 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1574 {
1575         int *dbm_max = arg;
1576         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1577
1578         struct nlattr **attr = nl80211_parse(msg);
1579         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1580         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1581         struct nlattr *band, *freq;
1582
1583         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1584                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1585                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1586                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1587                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1588                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1589                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1590         };
1591
1592         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1593         *dbm_max = -1;
1594
1595         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1596         {
1597                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1598                           nla_len(band), NULL);
1599
1600                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1601                 {
1602                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1603                                   nla_data(freq), nla_len(freq), freq_policy);
1604
1605                         ch_cmp = nl80211_freq2channel(nla_get_u32(
1606                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1607
1608                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
1609                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1610                         {
1611                                 *dbm_max = (int)(0.01 * nla_get_u32(
1612                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1613
1614                                 break;
1615                         }
1616                 }
1617         }
1618
1619         return NL_SKIP;
1620 }
1621
1622 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1623 {
1624         int ch_cur;
1625         int dbm_max = -1, dbm_cur, dbm_cnt;
1626         struct nl80211_msg_conveyor *req;
1627         struct iwinfo_txpwrlist_entry entry;
1628
1629         if (nl80211_get_channel(ifname, &ch_cur))
1630                 ch_cur = 0;
1631
1632         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1633         if (req)
1634         {
1635                 /* initialize the value pointer with channel for callback */
1636                 dbm_max = ch_cur;
1637
1638                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1639                 nl80211_free(req);
1640         }
1641
1642         if (dbm_max > 0)
1643         {
1644                 for (dbm_cur = 0, dbm_cnt = 0;
1645                      dbm_cur < dbm_max;
1646                      dbm_cur++, dbm_cnt++)
1647                 {
1648                         entry.dbm = dbm_cur;
1649                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1650
1651                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1652                 }
1653
1654                 entry.dbm = dbm_max;
1655                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1656
1657                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1658                 dbm_cnt++;
1659
1660                 *len = dbm_cnt * sizeof(entry);
1661                 return 0;
1662         }
1663
1664         return -1;
1665 }
1666
1667 static void nl80211_get_scancrypto(const char *spec,
1668         struct iwinfo_crypto_entry *c)
1669 {
1670         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1671         {
1672                 c->enabled = 1;
1673
1674                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1675                         c->wpa_version = 3;
1676
1677                 else if (strstr(spec, "WPA2"))
1678                         c->wpa_version = 2;
1679
1680                 else if (strstr(spec, "WPA"))
1681                         c->wpa_version = 1;
1682
1683                 else if (strstr(spec, "WEP"))
1684                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1685
1686
1687                 if (strstr(spec, "PSK"))
1688                         c->auth_suites |= IWINFO_KMGMT_PSK;
1689
1690                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1691                         c->auth_suites |= IWINFO_KMGMT_8021x;
1692
1693                 if (strstr(spec, "WPA-NONE"))
1694                         c->auth_suites |= IWINFO_KMGMT_NONE;
1695
1696
1697                 if (strstr(spec, "TKIP"))
1698                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1699
1700                 if (strstr(spec, "CCMP"))
1701                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1702
1703                 if (strstr(spec, "WEP-40"))
1704                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1705
1706                 if (strstr(spec, "WEP-104"))
1707                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1708
1709                 c->group_ciphers = c->pair_ciphers;
1710         }
1711         else
1712         {
1713                 c->enabled = 0;
1714         }
1715 }
1716
1717
1718 struct nl80211_scanlist {
1719         struct iwinfo_scanlist_entry *e;
1720         int len;
1721 };
1722
1723
1724 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1725                                     struct iwinfo_scanlist_entry *e)
1726 {
1727         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1728         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1729         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1730
1731         while (ielen >= 2 && ielen >= ie[1])
1732         {
1733                 switch (ie[0])
1734                 {
1735                 case 0: /* SSID */
1736                         memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1737                         break;
1738
1739                 case 48: /* RSN */
1740                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1741                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1742                         break;
1743
1744                 case 221: /* Vendor */
1745                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1746                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1747                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1748                         break;
1749                 }
1750
1751                 ielen -= ie[1] + 2;
1752                 ie += ie[1] + 2;
1753         }
1754 }
1755
1756 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1757 {
1758         int8_t rssi;
1759         uint16_t caps;
1760
1761         struct nl80211_scanlist *sl = arg;
1762         struct nlattr **tb = nl80211_parse(msg);
1763         struct nlattr *bss[NL80211_BSS_MAX + 1];
1764
1765         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1766                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
1767                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
1768                 [NL80211_BSS_BSSID]                = {                 },
1769                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
1770                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
1771                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
1772                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
1773                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
1774                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
1775                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
1776                 [NL80211_BSS_BEACON_IES]           = {                 },
1777         };
1778
1779         if (!tb[NL80211_ATTR_BSS] ||
1780                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1781                                  bss_policy) ||
1782                 !bss[NL80211_BSS_BSSID])
1783         {
1784                 return NL_SKIP;
1785         }
1786
1787         if (bss[NL80211_BSS_CAPABILITY])
1788                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1789         else
1790                 caps = 0;
1791
1792         memset(sl->e, 0, sizeof(*sl->e));
1793         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1794
1795         if (caps & (1<<1))
1796                 sl->e->mode = IWINFO_OPMODE_ADHOC;
1797         else if (caps & (1<<0))
1798                 sl->e->mode = IWINFO_OPMODE_MASTER;
1799         else
1800                 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1801
1802         if (caps & (1<<4))
1803                 sl->e->crypto.enabled = 1;
1804
1805         if (bss[NL80211_BSS_FREQUENCY])
1806                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1807                         bss[NL80211_BSS_FREQUENCY]));
1808
1809         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1810                 nl80211_get_scanlist_ie(bss, sl->e);
1811
1812         if (bss[NL80211_BSS_SIGNAL_MBM])
1813         {
1814                 sl->e->signal =
1815                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1816
1817                 rssi = sl->e->signal - 0x100;
1818
1819                 if (rssi < -110)
1820                         rssi = -110;
1821                 else if (rssi > -40)
1822                         rssi = -40;
1823
1824                 sl->e->quality = (rssi + 110);
1825                 sl->e->quality_max = 70;
1826         }
1827
1828         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1829         {
1830                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1831                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1832         }
1833
1834         sl->e++;
1835         sl->len++;
1836
1837         return NL_SKIP;
1838 }
1839
1840 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1841 {
1842         struct nl80211_msg_conveyor *req;
1843         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1844
1845         req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1846         if (req)
1847         {
1848                 nl80211_send(req, NULL, NULL);
1849                 nl80211_free(req);
1850         }
1851
1852         nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1853
1854         req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1855         if (req)
1856         {
1857                 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1858                 nl80211_free(req);
1859         }
1860
1861         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1862         return *len ? 0 : -1;
1863 }
1864
1865 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1866 {
1867         int freq, rssi, qmax, count;
1868         char *res;
1869         char ssid[128] = { 0 };
1870         char bssid[18] = { 0 };
1871         char cipher[256] = { 0 };
1872
1873         /* Got a radioX pseudo interface, find some interface on it or create one */
1874         if (!strncmp(ifname, "radio", 5))
1875         {
1876                 /* Reuse existing interface */
1877                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1878                 {
1879                         return nl80211_get_scanlist(res, buf, len);
1880                 }
1881
1882                 /* Need to spawn a temporary iface for scanning */
1883                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1884                 {
1885                         count = nl80211_get_scanlist(res, buf, len);
1886                         nl80211_ifdel(res);
1887                         return count;
1888                 }
1889         }
1890
1891         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1892
1893         /* WPA supplicant */
1894         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1895         {
1896                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1897                 {
1898                         nl80211_get_quality_max(ifname, &qmax);
1899
1900                         count = -1;
1901
1902                         do {
1903                                 if (res[0] == '<')
1904                                 {
1905                                         /* skip log lines */
1906                                         goto nextline;
1907                                 }
1908                                 if (count < 0)
1909                                 {
1910                                         /* skip header line */
1911                                         count++;
1912                                         goto nextline;
1913                                 }
1914                                 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1915                                               bssid, &freq, &rssi, cipher, ssid) < 5)
1916                                 {
1917                                         /* skip malformed lines */
1918                                         goto nextline;
1919                                 }
1920                                 /* BSSID */
1921                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1922                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1923                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1924                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1925                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1926                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1927
1928                                 /* SSID */
1929                                 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1930
1931                                 /* Mode (assume master) */
1932                                 if (strstr(cipher,"[MESH]"))
1933                                         e->mode = IWINFO_OPMODE_MESHPOINT;
1934                                 else
1935                                         e->mode = IWINFO_OPMODE_MASTER;
1936
1937                                 /* Channel */
1938                                 e->channel = nl80211_freq2channel(freq);
1939
1940                                 /* Signal */
1941                                 e->signal = rssi;
1942
1943                                 /* Quality */
1944                                 if (rssi < 0)
1945                                 {
1946                                         /* The cfg80211 wext compat layer assumes a signal range
1947                                          * of -110 dBm to -40 dBm, the quality value is derived
1948                                          * by adding 110 to the signal level */
1949                                         if (rssi < -110)
1950                                                 rssi = -110;
1951                                         else if (rssi > -40)
1952                                                 rssi = -40;
1953
1954                                         e->quality = (rssi + 110);
1955                                 }
1956                                 else
1957                                 {
1958                                         e->quality = rssi;
1959                                 }
1960
1961                                 /* Max. Quality */
1962                                 e->quality_max = qmax;
1963
1964                                 /* Crypto */
1965                                 nl80211_get_scancrypto(cipher, &e->crypto);
1966
1967                                 count++;
1968                                 e++;
1969
1970                                 memset(ssid, 0, sizeof(ssid));
1971                                 memset(bssid, 0, sizeof(bssid));
1972                                 memset(cipher, 0, sizeof(cipher));
1973
1974                         nextline:
1975                                 /* advance to next line */
1976                                 while( *res && *res++ != '\n' );
1977                         }
1978                         while( *res );
1979
1980                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1981                         return 0;
1982                 }
1983         }
1984
1985         /* AP scan */
1986         else
1987         {
1988                 /* Got a temp interface, don't create yet another one */
1989                 if (!strncmp(ifname, "tmp.", 4))
1990                 {
1991                         if (!iwinfo_ifup(ifname))
1992                                 return -1;
1993
1994                         nl80211_get_scanlist_nl(ifname, buf, len);
1995                         iwinfo_ifdown(ifname);
1996                         return 0;
1997                 }
1998
1999                 /* Spawn a new scan interface */
2000                 else
2001                 {
2002                         if (!(res = nl80211_ifadd(ifname)))
2003                                 goto out;
2004
2005                         if (!iwinfo_ifmac(res))
2006                                 goto out;
2007
2008                         /* if we can take the new interface up, the driver supports an
2009                          * additional interface and there's no need to tear down the ap */
2010                         if (iwinfo_ifup(res))
2011                         {
2012                                 nl80211_get_scanlist_nl(res, buf, len);
2013                                 iwinfo_ifdown(res);
2014                         }
2015
2016                         /* driver cannot create secondary interface, take down ap
2017                          * during scan */
2018                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2019                         {
2020                                 nl80211_get_scanlist_nl(res, buf, len);
2021                                 iwinfo_ifdown(res);
2022                                 iwinfo_ifup(ifname);
2023                                 nl80211_hostapd_hup(ifname);
2024                         }
2025
2026                 out:
2027                         nl80211_ifdel(res);
2028                         return 0;
2029                 }
2030         }
2031
2032         return -1;
2033 }
2034
2035 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2036 {
2037         int bands_remain, freqs_remain;
2038
2039         struct nl80211_array_buf *arr = arg;
2040         struct iwinfo_freqlist_entry *e = arr->buf;
2041
2042         struct nlattr **attr = nl80211_parse(msg);
2043         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2044         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2045         struct nlattr *band, *freq;
2046
2047         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2048                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
2049                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
2050                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2051                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
2052                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
2053                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
2054         };
2055
2056         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2057         {
2058                 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2059                           nla_data(band), nla_len(band), NULL);
2060
2061                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2062                 {
2063                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2064                                   nla_data(freq), nla_len(freq), NULL);
2065
2066                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2067                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2068                                 continue;
2069
2070                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2071                         e->channel = nl80211_freq2channel(e->mhz);
2072
2073                         e->restricted = (
2074                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2075                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
2076                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2077                         ) ? 1 : 0;
2078
2079                         e++;
2080                         arr->count++;
2081                 }
2082         }
2083
2084         return NL_SKIP;
2085 }
2086
2087 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2088 {
2089         struct nl80211_msg_conveyor *req;
2090         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2091
2092         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2093         if (req)
2094         {
2095                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2096                 nl80211_free(req);
2097         }
2098
2099         if (arr.count > 0)
2100         {
2101                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2102                 return 0;
2103         }
2104
2105         return -1;
2106 }
2107
2108 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2109 {
2110         char *buf = arg;
2111         struct nlattr **attr = nl80211_parse(msg);
2112
2113         if (attr[NL80211_ATTR_REG_ALPHA2])
2114                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2115         else
2116                 buf[0] = 0;
2117
2118         return NL_SKIP;
2119 }
2120
2121 int nl80211_get_country(const char *ifname, char *buf)
2122 {
2123         int rv = -1;
2124         struct nl80211_msg_conveyor *req;
2125
2126         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2127         if (req)
2128         {
2129                 nl80211_send(req, nl80211_get_country_cb, buf);
2130                 nl80211_free(req);
2131
2132                 if (buf[0])
2133                         rv = 0;
2134         }
2135
2136         return rv;
2137 }
2138
2139 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2140 {
2141         int i, count;
2142         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2143         const struct iwinfo_iso3166_label *l;
2144
2145         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2146         {
2147                 e->iso3166 = l->iso3166;
2148                 e->ccode[0] = (l->iso3166 / 256);
2149                 e->ccode[1] = (l->iso3166 % 256);
2150         }
2151
2152         *len = (count * sizeof(struct iwinfo_country_entry));
2153         return 0;
2154 }
2155
2156 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2157 {
2158         int *modes = arg;
2159         int bands_remain, freqs_remain;
2160         uint16_t caps = 0;
2161         struct nlattr **attr = nl80211_parse(msg);
2162         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2163         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2164         struct nlattr *band, *freq;
2165
2166         *modes = 0;
2167
2168         if (attr[NL80211_ATTR_WIPHY_BANDS])
2169         {
2170                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2171                 {
2172                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2173                                   nla_data(band), nla_len(band), NULL);
2174
2175                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2176                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2177
2178                         /* Treat any nonzero capability as 11n */
2179                         if (caps > 0)
2180                                 *modes |= IWINFO_80211_N;
2181
2182                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2183                                             freqs_remain)
2184                         {
2185                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2186                                           nla_data(freq), nla_len(freq), NULL);
2187
2188                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2189                                         continue;
2190
2191                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2192                                 {
2193                                         *modes |= IWINFO_80211_B;
2194                                         *modes |= IWINFO_80211_G;
2195                                 }
2196                                 else
2197                                 {
2198                                         *modes |= IWINFO_80211_A;
2199                                 }
2200                         }
2201                 }
2202         }
2203
2204         return NL_SKIP;
2205 }
2206
2207 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2208 {
2209         struct nl80211_msg_conveyor *req;
2210
2211         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2212         if (req)
2213         {
2214                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2215                 nl80211_free(req);
2216         }
2217
2218         return *buf ? 0 : -1;
2219 }
2220
2221 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2222 {
2223         struct nlattr **attr = nl80211_parse(msg);
2224         struct nlattr *comb;
2225         int *ret = arg;
2226         int comb_rem, limit_rem, mode_rem;
2227
2228         *ret = 0;
2229         if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2230                 return NL_SKIP;
2231
2232         nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2233         {
2234                 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2235                         [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2236                         [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2237                 };
2238                 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
2239                 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2240                         [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2241                         [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2242                 };
2243                 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
2244                 struct nlattr *limit;
2245
2246                 nla_parse_nested(tb_comb, NL80211_BAND_ATTR_MAX, comb, iface_combination_policy);
2247
2248                 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2249                         continue;
2250
2251                 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2252                 {
2253                         struct nlattr *mode;
2254
2255                         nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2256
2257                         if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2258                             !tb_limit[NL80211_IFACE_LIMIT_MAX])
2259                                 continue;
2260
2261                         if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2262                                 continue;
2263
2264                         nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2265                                 if (nla_type(mode) == NL80211_IFTYPE_AP)
2266                                         *ret = 1;
2267                         }
2268                 }
2269         }
2270
2271         return NL_SKIP;
2272 }
2273
2274 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2275 {
2276         struct nl80211_msg_conveyor *req;
2277
2278         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2279         if (!req)
2280                 return -1;
2281
2282         nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2283         nl80211_free(req);
2284         return 0;
2285 }
2286
2287 int nl80211_get_hardware_id(const char *ifname, char *buf)
2288 {
2289         int rv;
2290         char *res;
2291
2292         /* Got a radioX pseudo interface, find some interface on it or create one */
2293         if (!strncmp(ifname, "radio", 5))
2294         {
2295                 /* Reuse existing interface */
2296                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2297                 {
2298                         rv = wext_get_hardware_id(res, buf);
2299                 }
2300
2301                 /* Need to spawn a temporary iface for finding IDs */
2302                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2303                 {
2304                         rv = wext_get_hardware_id(res, buf);
2305                         nl80211_ifdel(res);
2306                 }
2307         }
2308         else
2309         {
2310                 rv = wext_get_hardware_id(ifname, buf);
2311         }
2312
2313         /* Failed to obtain hardware IDs, search board config */
2314         if (rv)
2315         {
2316                 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2317         }
2318
2319         return rv;
2320 }
2321
2322 static const struct iwinfo_hardware_entry *
2323 nl80211_get_hardware_entry(const char *ifname)
2324 {
2325         struct iwinfo_hardware_id id;
2326
2327         if (nl80211_get_hardware_id(ifname, (char *)&id))
2328                 return NULL;
2329
2330         return iwinfo_hardware(&id);
2331 }
2332
2333 int nl80211_get_hardware_name(const char *ifname, char *buf)
2334 {
2335         const struct iwinfo_hardware_entry *hw;
2336
2337         if (!(hw = nl80211_get_hardware_entry(ifname)))
2338                 sprintf(buf, "Generic MAC80211");
2339         else
2340                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2341
2342         return 0;
2343 }
2344
2345 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2346 {
2347         const struct iwinfo_hardware_entry *hw;
2348
2349         if (!(hw = nl80211_get_hardware_entry(ifname)))
2350                 return -1;
2351
2352         *buf = hw->txpower_offset;
2353         return 0;
2354 }
2355
2356 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2357 {
2358         const struct iwinfo_hardware_entry *hw;
2359
2360         if (!(hw = nl80211_get_hardware_entry(ifname)))
2361                 return -1;
2362
2363         *buf = hw->frequency_offset;
2364         return 0;
2365 }