vcs.maemo.org Git - wpasupplicant/blob - src/drivers/driver_nl80211.c

   1 /*
   2  * WPA Supplicant - driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <net/if_arp.h>
  18 #include <netlink/genl/genl.h>
  19 #include <netlink/genl/family.h>
  20 #include <netlink/genl/ctrl.h>
  21 #include "nl80211_copy.h"
  22 #ifdef CONFIG_CLIENT_MLME
  23 #include <netpacket/packet.h>
  24 #include <linux/if_ether.h>
  25 #include "radiotap.h"
  26 #include "radiotap_iter.h"
  27 #endif /* CONFIG_CLIENT_MLME */
  28
  29 #include "wireless_copy.h"
  30 #include "common.h"
  31 #include "driver.h"
  32 #include "eloop.h"
  33 #include "ieee802_11_defs.h"
  34
  35 #ifndef IFF_LOWER_UP
  36 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  37 #endif
  38 #ifndef IFF_DORMANT
  39 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  40 #endif
  41
  42 #ifndef IF_OPER_DORMANT
  43 #define IF_OPER_DORMANT 5
  44 #endif
  45 #ifndef IF_OPER_UP
  46 #define IF_OPER_UP 6
  47 #endif
  48
  49
  50 struct wpa_driver_nl80211_data {
  51         void *ctx;
  52         int wext_event_sock;
  53         int ioctl_sock;
  54         char ifname[IFNAMSIZ + 1];
  55         int ifindex;
  56         int if_removed;
  57         u8 *assoc_req_ies;
  58         size_t assoc_req_ies_len;
  59         u8 *assoc_resp_ies;
  60         size_t assoc_resp_ies_len;
  61         struct wpa_driver_capa capa;
  62         int has_capability;
  63         int we_version_compiled;
  64
  65         /* for set_auth_alg fallback */
  66         int use_crypt;
  67         int auth_alg_fallback;
  68
  69         int operstate;
  70
  71         char mlmedev[IFNAMSIZ + 1];
  72
  73         int scan_complete_events;
  74
  75         struct nl_handle *nl_handle;
  76         struct nl_cache *nl_cache;
  77         struct nl_cb *nl_cb;
  78         struct genl_family *nl80211;
  79
  80 #ifdef CONFIG_CLIENT_MLME
  81         int monitor_sock; /* socket for monitor */
  82         int monitor_ifidx;
  83 #endif /* CONFIG_CLIENT_MLME */
  84 };
  85
  86
  87 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
  88                                             void *timeout_ctx);
  89 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
  90 static int wpa_driver_nl80211_flush_pmkid(void *priv);
  91 static int wpa_driver_nl80211_get_range(void *priv);
  92 static int
  93 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
  94
  95
  96 /* nl80211 code */
  97 static int ack_handler(struct nl_msg *msg, void *arg)
  98 {
  99         int *err = arg;
 100         *err = 0;
 101         return NL_STOP;
 102 }
 103
 104 static int finish_handler(struct nl_msg *msg, void *arg)
 105 {
 106         int *ret = arg;
 107         *ret = 0;
 108         return NL_SKIP;
 109 }
 110
 111 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 112                          void *arg)
 113 {
 114         int *ret = arg;
 115         *ret = err->error;
 116         return NL_SKIP;
 117 }
 118
 119 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 120                               struct nl_msg *msg,
 121                               int (*valid_handler)(struct nl_msg *, void *),
 122                               void *valid_data)
 123 {
 124         struct nl_cb *cb;
 125         int err = -ENOMEM;
 126
 127         cb = nl_cb_clone(drv->nl_cb);
 128         if (!cb)
 129                 goto out;
 130
 131         err = nl_send_auto_complete(drv->nl_handle, msg);
 132         if (err < 0)
 133                 goto out;
 134
 135         err = 1;
 136
 137         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 138         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 139         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 140
 141         if (valid_handler)
 142                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 143                           valid_handler, valid_data);
 144
 145         while (err > 0)
 146                 nl_recvmsgs(drv->nl_handle, cb);
 147  out:
 148         nl_cb_put(cb);
 149         nlmsg_free(msg);
 150         return err;
 151 }
 152
 153
 154 struct family_data {
 155         const char *group;
 156         int id;
 157 };
 158
 159
 160 static int family_handler(struct nl_msg *msg, void *arg)
 161 {
 162         struct family_data *res = arg;
 163         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 164         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 165         struct nlattr *mcgrp;
 166         int i;
 167
 168         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 169                   genlmsg_attrlen(gnlh, 0), NULL);
 170         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 171                 return NL_SKIP;
 172
 173         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 174                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 175                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 176                           nla_len(mcgrp), NULL);
 177                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 178                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 179                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 180                                res->group,
 181                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 182                         continue;
 183                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 184                 break;
 185         };
 186
 187         return NL_SKIP;
 188 }
 189
 190
 191 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 192                                const char *family, const char *group)
 193 {
 194         struct nl_msg *msg;
 195         int ret = -1;
 196         struct family_data res = { group, -ENOENT };
 197
 198         msg = nlmsg_alloc();
 199         if (!msg)
 200                 return -ENOMEM;
 201         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 202                     0, 0, CTRL_CMD_GETFAMILY, 0);
 203         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 204
 205         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 206         msg = NULL;
 207         if (ret == 0)
 208                 ret = res.id;
 209
 210 nla_put_failure:
 211         nlmsg_free(msg);
 212         return ret;
 213 }
 214
 215
 216 static int wpa_driver_nl80211_send_oper_ifla(
 217         struct wpa_driver_nl80211_data *drv,
 218         int linkmode, int operstate)
 219 {
 220         struct {
 221                 struct nlmsghdr hdr;
 222                 struct ifinfomsg ifinfo;
 223                 char opts[16];
 224         } req;
 225         struct rtattr *rta;
 226         static int nl_seq;
 227         ssize_t ret;
 228
 229         os_memset(&req, 0, sizeof(req));
 230
 231         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 232         req.hdr.nlmsg_type = RTM_SETLINK;
 233         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 234         req.hdr.nlmsg_seq = ++nl_seq;
 235         req.hdr.nlmsg_pid = 0;
 236
 237         req.ifinfo.ifi_family = AF_UNSPEC;
 238         req.ifinfo.ifi_type = 0;
 239         req.ifinfo.ifi_index = drv->ifindex;
 240         req.ifinfo.ifi_flags = 0;
 241         req.ifinfo.ifi_change = 0;
 242
 243         if (linkmode != -1) {
 244                 rta = (struct rtattr *)
 245                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 246                 rta->rta_type = IFLA_LINKMODE;
 247                 rta->rta_len = RTA_LENGTH(sizeof(char));
 248                 *((char *) RTA_DATA(rta)) = linkmode;
 249                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 250                         RTA_LENGTH(sizeof(char));
 251         }
 252         if (operstate != -1) {
 253                 rta = (struct rtattr *)
 254                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 255                 rta->rta_type = IFLA_OPERSTATE;
 256                 rta->rta_len = RTA_LENGTH(sizeof(char));
 257                 *((char *) RTA_DATA(rta)) = operstate;
 258                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 259                         RTA_LENGTH(sizeof(char));
 260         }
 261
 262         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 263                    linkmode, operstate);
 264
 265         ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
 266         if (ret < 0) {
 267                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 268                            "%s (assume operstate is not supported)",
 269                            strerror(errno));
 270         }
 271
 272         return ret < 0 ? -1 : 0;
 273 }
 274
 275
 276 static int wpa_driver_nl80211_set_auth_param(
 277         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 278 {
 279         struct iwreq iwr;
 280         int ret = 0;
 281
 282         os_memset(&iwr, 0, sizeof(iwr));
 283         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 284         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 285         iwr.u.param.value = value;
 286
 287         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 288                 if (errno != EOPNOTSUPP) {
 289                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 290                                    "value 0x%x) failed: %s)",
 291                                    idx, value, strerror(errno));
 292                 }
 293                 ret = errno == EOPNOTSUPP ? -2 : -1;
 294         }
 295
 296         return ret;
 297 }
 298
 299
 300 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 301 {
 302         struct wpa_driver_nl80211_data *drv = priv;
 303         struct iwreq iwr;
 304         int ret = 0;
 305
 306         os_memset(&iwr, 0, sizeof(iwr));
 307         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 308
 309         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 310                 perror("ioctl[SIOCGIWAP]");
 311                 ret = -1;
 312         }
 313         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 314
 315         return ret;
 316 }
 317
 318
 319 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 320 {
 321         struct wpa_driver_nl80211_data *drv = priv;
 322         struct iwreq iwr;
 323         int ret = 0;
 324
 325         os_memset(&iwr, 0, sizeof(iwr));
 326         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 327         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 328         if (bssid)
 329                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 330         else
 331                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 332
 333         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 334                 perror("ioctl[SIOCSIWAP]");
 335                 ret = -1;
 336         }
 337
 338         return ret;
 339 }
 340
 341
 342 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 343 {
 344         struct wpa_driver_nl80211_data *drv = priv;
 345         struct iwreq iwr;
 346         int ret = 0;
 347
 348         os_memset(&iwr, 0, sizeof(iwr));
 349         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 350         iwr.u.essid.pointer = (caddr_t) ssid;
 351         iwr.u.essid.length = 32;
 352
 353         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 354                 perror("ioctl[SIOCGIWESSID]");
 355                 ret = -1;
 356         } else {
 357                 ret = iwr.u.essid.length;
 358                 if (ret > 32)
 359                         ret = 32;
 360                 /* Some drivers include nul termination in the SSID, so let's
 361                  * remove it here before further processing. WE-21 changes this
 362                  * to explicitly require the length _not_ to include nul
 363                  * termination. */
 364                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 365                     drv->we_version_compiled < 21)
 366                         ret--;
 367         }
 368
 369         return ret;
 370 }
 371
 372
 373 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 374                                        size_t ssid_len)
 375 {
 376         struct wpa_driver_nl80211_data *drv = priv;
 377         struct iwreq iwr;
 378         int ret = 0;
 379         char buf[33];
 380
 381         if (ssid_len > 32)
 382                 return -1;
 383
 384         os_memset(&iwr, 0, sizeof(iwr));
 385         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 386         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 387         iwr.u.essid.flags = (ssid_len != 0);
 388         os_memset(buf, 0, sizeof(buf));
 389         os_memcpy(buf, ssid, ssid_len);
 390         iwr.u.essid.pointer = (caddr_t) buf;
 391         if (drv->we_version_compiled < 21) {
 392                 /* For historic reasons, set SSID length to include one extra
 393                  * character, C string nul termination, even though SSID is
 394                  * really an octet string that should not be presented as a C
 395                  * string. Some Linux drivers decrement the length by one and
 396                  * can thus end up missing the last octet of the SSID if the
 397                  * length is not incremented here. WE-21 changes this to
 398                  * explicitly require the length _not_ to include nul
 399                  * termination. */
 400                 if (ssid_len)
 401                         ssid_len++;
 402         }
 403         iwr.u.essid.length = ssid_len;
 404
 405         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 406                 perror("ioctl[SIOCSIWESSID]");
 407                 ret = -1;
 408         }
 409
 410         return ret;
 411 }
 412
 413
 414 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 415 {
 416         struct wpa_driver_nl80211_data *drv = priv;
 417         struct iwreq iwr;
 418         int ret = 0;
 419
 420         os_memset(&iwr, 0, sizeof(iwr));
 421         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 422         iwr.u.freq.m = freq * 100000;
 423         iwr.u.freq.e = 1;
 424
 425         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 426                 perror("ioctl[SIOCSIWFREQ]");
 427                 ret = -1;
 428         }
 429
 430         return ret;
 431 }
 432
 433
 434 static void
 435 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 436 {
 437         union wpa_event_data data;
 438
 439         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 440                    custom);
 441
 442         os_memset(&data, 0, sizeof(data));
 443         /* Host AP driver */
 444         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 445                 data.michael_mic_failure.unicast =
 446                         os_strstr(custom, " unicast ") != NULL;
 447                 /* TODO: parse parameters(?) */
 448                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 449         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 450                 char *spos;
 451                 int bytes;
 452
 453                 spos = custom + 17;
 454
 455                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 456                 if (!bytes || (bytes & 1))
 457                         return;
 458                 bytes /= 2;
 459
 460                 data.assoc_info.req_ies = os_malloc(bytes);
 461                 if (data.assoc_info.req_ies == NULL)
 462                         return;
 463
 464                 data.assoc_info.req_ies_len = bytes;
 465                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 466
 467                 spos += bytes * 2;
 468
 469                 data.assoc_info.resp_ies = NULL;
 470                 data.assoc_info.resp_ies_len = 0;
 471
 472                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 473                         spos += 9;
 474
 475                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 476                         if (!bytes || (bytes & 1))
 477                                 goto done;
 478                         bytes /= 2;
 479
 480                         data.assoc_info.resp_ies = os_malloc(bytes);
 481                         if (data.assoc_info.resp_ies == NULL)
 482                                 goto done;
 483
 484                         data.assoc_info.resp_ies_len = bytes;
 485                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 486                 }
 487
 488                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 489
 490         done:
 491                 os_free(data.assoc_info.resp_ies);
 492                 os_free(data.assoc_info.req_ies);
 493 #ifdef CONFIG_PEERKEY
 494         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 495                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 496                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 497                                    "STKSTART.request '%s'", custom + 17);
 498                         return;
 499                 }
 500                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 501 #endif /* CONFIG_PEERKEY */
 502         }
 503 }
 504
 505
 506 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 507         void *ctx, const char *ev, size_t len)
 508 {
 509         const struct iw_michaelmicfailure *mic;
 510         union wpa_event_data data;
 511
 512         if (len < sizeof(*mic))
 513                 return -1;
 514
 515         mic = (const struct iw_michaelmicfailure *) ev;
 516
 517         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 518                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 519                    MAC2STR(mic->src_addr.sa_data));
 520
 521         os_memset(&data, 0, sizeof(data));
 522         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 523         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 524
 525         return 0;
 526 }
 527
 528
 529 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 530         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 531 {
 532         const struct iw_pmkid_cand *cand;
 533         union wpa_event_data data;
 534         const u8 *addr;
 535
 536         if (len < sizeof(*cand))
 537                 return -1;
 538
 539         cand = (const struct iw_pmkid_cand *) ev;
 540         addr = (const u8 *) cand->bssid.sa_data;
 541
 542         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 543                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 544                    cand->index, MAC2STR(addr));
 545
 546         os_memset(&data, 0, sizeof(data));
 547         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 548         data.pmkid_candidate.index = cand->index;
 549         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 550         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 551
 552         return 0;
 553 }
 554
 555
 556 static int wpa_driver_nl80211_event_wireless_assocreqie(
 557         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 558 {
 559         if (len < 0)
 560                 return -1;
 561
 562         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 563                     len);
 564         os_free(drv->assoc_req_ies);
 565         drv->assoc_req_ies = os_malloc(len);
 566         if (drv->assoc_req_ies == NULL) {
 567                 drv->assoc_req_ies_len = 0;
 568                 return -1;
 569         }
 570         os_memcpy(drv->assoc_req_ies, ev, len);
 571         drv->assoc_req_ies_len = len;
 572
 573         return 0;
 574 }
 575
 576
 577 static int wpa_driver_nl80211_event_wireless_assocrespie(
 578         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 579 {
 580         if (len < 0)
 581                 return -1;
 582
 583         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 584                     len);
 585         os_free(drv->assoc_resp_ies);
 586         drv->assoc_resp_ies = os_malloc(len);
 587         if (drv->assoc_resp_ies == NULL) {
 588                 drv->assoc_resp_ies_len = 0;
 589                 return -1;
 590         }
 591         os_memcpy(drv->assoc_resp_ies, ev, len);
 592         drv->assoc_resp_ies_len = len;
 593
 594         return 0;
 595 }
 596
 597
 598 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 599 {
 600         union wpa_event_data data;
 601
 602         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 603                 return;
 604
 605         os_memset(&data, 0, sizeof(data));
 606         if (drv->assoc_req_ies) {
 607                 data.assoc_info.req_ies = drv->assoc_req_ies;
 608                 drv->assoc_req_ies = NULL;
 609                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 610         }
 611         if (drv->assoc_resp_ies) {
 612                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 613                 drv->assoc_resp_ies = NULL;
 614                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 615         }
 616
 617         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 618
 619         os_free(data.assoc_info.req_ies);
 620         os_free(data.assoc_info.resp_ies);
 621 }
 622
 623
 624 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 625                                            void *ctx, char *data, int len)
 626 {
 627         struct iw_event iwe_buf, *iwe = &iwe_buf;
 628         char *pos, *end, *custom, *buf;
 629
 630         pos = data;
 631         end = data + len;
 632
 633         while (pos + IW_EV_LCP_LEN <= end) {
 634                 /* Event data may be unaligned, so make a local, aligned copy
 635                  * before processing. */
 636                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 637                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 638                            iwe->cmd, iwe->len);
 639                 if (iwe->len <= IW_EV_LCP_LEN)
 640                         return;
 641
 642                 custom = pos + IW_EV_POINT_LEN;
 643                 if (drv->we_version_compiled > 18 &&
 644                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 645                      iwe->cmd == IWEVCUSTOM ||
 646                      iwe->cmd == IWEVASSOCREQIE ||
 647                      iwe->cmd == IWEVASSOCRESPIE ||
 648                      iwe->cmd == IWEVPMKIDCAND)) {
 649                         /* WE-19 removed the pointer from struct iw_point */
 650                         char *dpos = (char *) &iwe_buf.u.data.length;
 651                         int dlen = dpos - (char *) &iwe_buf;
 652                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 653                                   sizeof(struct iw_event) - dlen);
 654                 } else {
 655                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 656                         custom += IW_EV_POINT_OFF;
 657                 }
 658
 659                 switch (iwe->cmd) {
 660                 case SIOCGIWAP:
 661                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 662                                    MACSTR,
 663                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 664                         if (is_zero_ether_addr(
 665                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 666                             os_memcmp(iwe->u.ap_addr.sa_data,
 667                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 668                             0) {
 669                                 os_free(drv->assoc_req_ies);
 670                                 drv->assoc_req_ies = NULL;
 671                                 os_free(drv->assoc_resp_ies);
 672                                 drv->assoc_resp_ies = NULL;
 673                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 674                                                      NULL);
 675
 676                         } else {
 677                                 wpa_driver_nl80211_event_assoc_ies(drv);
 678                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 679                         }
 680                         break;
 681                 case IWEVMICHAELMICFAILURE:
 682                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 683                                 ctx, custom, iwe->u.data.length);
 684                         break;
 685                 case IWEVCUSTOM:
 686                         if (custom + iwe->u.data.length > end)
 687                                 return;
 688                         buf = os_malloc(iwe->u.data.length + 1);
 689                         if (buf == NULL)
 690                                 return;
 691                         os_memcpy(buf, custom, iwe->u.data.length);
 692                         buf[iwe->u.data.length] = '\0';
 693                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 694                         os_free(buf);
 695                         break;
 696                 case IWEVASSOCREQIE:
 697                         wpa_driver_nl80211_event_wireless_assocreqie(
 698                                 drv, custom, iwe->u.data.length);
 699                         break;
 700                 case IWEVASSOCRESPIE:
 701                         wpa_driver_nl80211_event_wireless_assocrespie(
 702                                 drv, custom, iwe->u.data.length);
 703                         break;
 704                 case IWEVPMKIDCAND:
 705                         wpa_driver_nl80211_event_wireless_pmkidcand(
 706                                 drv, custom, iwe->u.data.length);
 707                         break;
 708                 }
 709
 710                 pos += iwe->len;
 711         }
 712 }
 713
 714
 715 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 716                                           void *ctx, char *buf, size_t len,
 717                                           int del)
 718 {
 719         union wpa_event_data event;
 720
 721         os_memset(&event, 0, sizeof(event));
 722         if (len > sizeof(event.interface_status.ifname))
 723                 len = sizeof(event.interface_status.ifname) - 1;
 724         os_memcpy(event.interface_status.ifname, buf, len);
 725         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 726                 EVENT_INTERFACE_ADDED;
 727
 728         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 729                    del ? "DEL" : "NEW",
 730                    event.interface_status.ifname,
 731                    del ? "removed" : "added");
 732
 733         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 734                 if (del)
 735                         drv->if_removed = 1;
 736                 else
 737                         drv->if_removed = 0;
 738         }
 739
 740         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 741 }
 742
 743
 744 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 745                                          struct nlmsghdr *h)
 746 {
 747         struct ifinfomsg *ifi;
 748         int attrlen, _nlmsg_len, rta_len;
 749         struct rtattr *attr;
 750
 751         ifi = NLMSG_DATA(h);
 752
 753         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 754
 755         attrlen = h->nlmsg_len - _nlmsg_len;
 756         if (attrlen < 0)
 757                 return 0;
 758
 759         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 760
 761         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 762         while (RTA_OK(attr, attrlen)) {
 763                 if (attr->rta_type == IFLA_IFNAME) {
 764                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 765                             == 0)
 766                                 return 1;
 767                         else
 768                                 break;
 769                 }
 770                 attr = RTA_NEXT(attr, attrlen);
 771         }
 772
 773         return 0;
 774 }
 775
 776
 777 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 778                                           int ifindex, struct nlmsghdr *h)
 779 {
 780         if (drv->ifindex == ifindex)
 781                 return 1;
 782
 783         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 784                 drv->ifindex = if_nametoindex(drv->ifname);
 785                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 786                            "interface");
 787                 wpa_driver_nl80211_finish_drv_init(drv);
 788                 return 1;
 789         }
 790
 791         return 0;
 792 }
 793
 794
 795 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 796                                               void *ctx, struct nlmsghdr *h,
 797                                               size_t len)
 798 {
 799         struct ifinfomsg *ifi;
 800         int attrlen, _nlmsg_len, rta_len;
 801         struct rtattr * attr;
 802
 803         if (len < sizeof(*ifi))
 804                 return;
 805
 806         ifi = NLMSG_DATA(h);
 807
 808         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 809                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 810                            ifi->ifi_index);
 811                 return;
 812         }
 813
 814         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 815                    "(%s%s%s%s)",
 816                    drv->operstate, ifi->ifi_flags,
 817                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 818                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 819                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 820                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 821         /*
 822          * Some drivers send the association event before the operup event--in
 823          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 824          * fails. This will hit us when wpa_supplicant does not need to do
 825          * IEEE 802.1X authentication
 826          */
 827         if (drv->operstate == 1 &&
 828             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 829             !(ifi->ifi_flags & IFF_RUNNING))
 830                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 831
 832         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 833
 834         attrlen = h->nlmsg_len - _nlmsg_len;
 835         if (attrlen < 0)
 836                 return;
 837
 838         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 839
 840         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 841         while (RTA_OK(attr, attrlen)) {
 842                 if (attr->rta_type == IFLA_WIRELESS) {
 843                         wpa_driver_nl80211_event_wireless(
 844                                 drv, ctx, ((char *) attr) + rta_len,
 845                                 attr->rta_len - rta_len);
 846                 } else if (attr->rta_type == IFLA_IFNAME) {
 847                         wpa_driver_nl80211_event_link(
 848                                 drv, ctx,
 849                                 ((char *) attr) + rta_len,
 850                                 attr->rta_len - rta_len, 0);
 851                 }
 852                 attr = RTA_NEXT(attr, attrlen);
 853         }
 854 }
 855
 856
 857 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 858                                               void *ctx, struct nlmsghdr *h,
 859                                               size_t len)
 860 {
 861         struct ifinfomsg *ifi;
 862         int attrlen, _nlmsg_len, rta_len;
 863         struct rtattr * attr;
 864
 865         if (len < sizeof(*ifi))
 866                 return;
 867
 868         ifi = NLMSG_DATA(h);
 869
 870         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 871
 872         attrlen = h->nlmsg_len - _nlmsg_len;
 873         if (attrlen < 0)
 874                 return;
 875
 876         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 877
 878         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 879         while (RTA_OK(attr, attrlen)) {
 880                 if (attr->rta_type == IFLA_IFNAME) {
 881                         wpa_driver_nl80211_event_link(
 882                                 drv, ctx,
 883                                 ((char *) attr) + rta_len,
 884                                 attr->rta_len - rta_len, 1);
 885                 }
 886                 attr = RTA_NEXT(attr, attrlen);
 887         }
 888 }
 889
 890
 891 static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
 892                                                   void *sock_ctx)
 893 {
 894         char buf[8192];
 895         int left;
 896         struct sockaddr_nl from;
 897         socklen_t fromlen;
 898         struct nlmsghdr *h;
 899         int max_events = 10;
 900
 901 try_again:
 902         fromlen = sizeof(from);
 903         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 904                         (struct sockaddr *) &from, &fromlen);
 905         if (left < 0) {
 906                 if (errno != EINTR && errno != EAGAIN)
 907                         perror("recvfrom(netlink)");
 908                 return;
 909         }
 910
 911         h = (struct nlmsghdr *) buf;
 912         while (left >= (int) sizeof(*h)) {
 913                 int len, plen;
 914
 915                 len = h->nlmsg_len;
 916                 plen = len - sizeof(*h);
 917                 if (len > left || plen < 0) {
 918                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 919                                    "len=%d left=%d plen=%d",
 920                                    len, left, plen);
 921                         break;
 922                 }
 923
 924                 switch (h->nlmsg_type) {
 925                 case RTM_NEWLINK:
 926                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 927                                                           h, plen);
 928                         break;
 929                 case RTM_DELLINK:
 930                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 931                                                           h, plen);
 932                         break;
 933                 }
 934
 935                 len = NLMSG_ALIGN(len);
 936                 left -= len;
 937                 h = (struct nlmsghdr *) ((char *) h + len);
 938         }
 939
 940         if (left > 0) {
 941                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 942                            "message", left);
 943         }
 944
 945         if (--max_events > 0) {
 946                 /*
 947                  * Try to receive all events in one eloop call in order to
 948                  * limit race condition on cases where AssocInfo event, Assoc
 949                  * event, and EAPOL frames are received more or less at the
 950                  * same time. We want to process the event messages first
 951                  * before starting EAPOL processing.
 952                  */
 953                 goto try_again;
 954         }
 955 }
 956
 957
 958 static int no_seq_check(struct nl_msg *msg, void *arg)
 959 {
 960         return NL_OK;
 961 }
 962
 963
 964 static int process_event(struct nl_msg *msg, void *arg)
 965 {
 966         struct wpa_driver_nl80211_data *drv = arg;
 967         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 968         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 969
 970         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 971                   genlmsg_attrlen(gnlh, 0), NULL);
 972
 973         if (tb[NL80211_ATTR_IFINDEX]) {
 974                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 975                 if (ifindex != drv->ifindex) {
 976                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 977                                    " for foreign interface (ifindex %d)",
 978                                    gnlh->cmd, ifindex);
 979                         return NL_SKIP;
 980                 }
 981         }
 982
 983         switch (gnlh->cmd) {
 984         case NL80211_CMD_NEW_SCAN_RESULTS:
 985                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 986                 drv->scan_complete_events = 1;
 987                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 988                                      drv->ctx);
 989                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 990                 break;
 991         case NL80211_CMD_SCAN_ABORTED:
 992                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 993                 /*
 994                  * Need to indicate that scan results are available in order
 995                  * not to make wpa_supplicant stop its scanning.
 996                  */
 997                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 998                                      drv->ctx);
 999                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1000                 break;
1001         default:
1002                 wpa_printf(MSG_DEBUG, "nl0211: Ignored unknown event (cmd=%d)",
1003                            gnlh->cmd);
1004                 break;
1005         }
1006
1007         return NL_SKIP;
1008 }
1009
1010
1011 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1012                                              void *sock_ctx)
1013 {
1014         struct nl_cb *cb;
1015         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1016
1017         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1018
1019         cb = nl_cb_clone(drv->nl_cb);
1020         if (!cb)
1021                 return;
1022         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1023         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1024         nl_recvmsgs(drv->nl_handle, cb);
1025         nl_cb_put(cb);
1026 }
1027
1028
1029 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
1030                                               const char *ifname, int *flags)
1031 {
1032         struct ifreq ifr;
1033
1034         os_memset(&ifr, 0, sizeof(ifr));
1035         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1036         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
1037                 perror("ioctl[SIOCGIFFLAGS]");
1038                 return -1;
1039         }
1040         *flags = ifr.ifr_flags & 0xffff;
1041         return 0;
1042 }
1043
1044
1045 /**
1046  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
1047  * @drv: driver_nl80211 private data
1048  * @flags: Pointer to returned flags value
1049  * Returns: 0 on success, -1 on failure
1050  */
1051 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
1052                                           int *flags)
1053 {
1054         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
1055 }
1056
1057
1058 static int wpa_driver_nl80211_set_ifflags_ifname(
1059         struct wpa_driver_nl80211_data *drv,
1060         const char *ifname, int flags)
1061 {
1062         struct ifreq ifr;
1063
1064         os_memset(&ifr, 0, sizeof(ifr));
1065         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1066         ifr.ifr_flags = flags & 0xffff;
1067         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
1068                 perror("SIOCSIFFLAGS");
1069                 return -1;
1070         }
1071         return 0;
1072 }
1073
1074
1075 /**
1076  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1077  * @drv: driver_nl80211 private data
1078  * @flags: New value for flags
1079  * Returns: 0 on success, -1 on failure
1080  */
1081 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
1082                                           int flags)
1083 {
1084         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
1085 }
1086
1087
1088 /**
1089  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1090  * @priv: driver_nl80211 private data
1091  * @alpha2_arg: country to which to switch to
1092  * Returns: 0 on success, -1 on failure
1093  *
1094  * This asks nl80211 to set the regulatory domain for given
1095  * country ISO / IEC alpha2.
1096  */
1097 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1098 {
1099         struct wpa_driver_nl80211_data *drv = priv;
1100         char alpha2[3];
1101         struct nl_msg *msg;
1102
1103         msg = nlmsg_alloc();
1104         if (!msg)
1105                 goto nla_put_failure;
1106
1107         alpha2[0] = alpha2_arg[0];
1108         alpha2[1] = alpha2_arg[1];
1109         alpha2[2] = '\0';
1110
1111         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1112                     0, NL80211_CMD_REQ_SET_REG, 0);
1113
1114         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1115         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1116                 return -EINVAL;
1117         return 0;
1118 nla_put_failure:
1119         return -EINVAL;
1120 }
1121
1122
1123 #ifdef CONFIG_CLIENT_MLME
1124
1125 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
1126                            int drop_unencrypted, int userspace_mlme)
1127 {
1128 #ifdef NL80211_CMD_SET_VIF
1129         struct nl_msg *msg;
1130         int ret = -1;
1131
1132         msg = nlmsg_alloc();
1133         if (!msg)
1134                 return -ENOMEM;
1135
1136         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1137                     NL80211_CMD_SET_VIF, 0);
1138
1139         if (drop_unencrypted >= 0)
1140                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
1141                            drop_unencrypted);
1142         if (userspace_mlme >= 0)
1143                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
1144                            userspace_mlme);
1145
1146         ret = 0;
1147
1148         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1149
1150         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1151         return ret;
1152
1153 nla_put_failure:
1154         return -ENOBUFS;
1155 #else /* NL80211_CMD_SET_VIF */
1156         return -1;
1157 #endif /* NL80211_CMD_SET_VIF */
1158 }
1159
1160
1161 static int wpa_driver_nl80211_set_userspace_mlme(
1162         struct wpa_driver_nl80211_data *drv, int enabled)
1163 {
1164         return nl80211_set_vif(drv, -1, enabled);
1165 }
1166
1167
1168 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
1169                                  int ifidx)
1170 {
1171         struct nl_msg *msg;
1172
1173         msg = nlmsg_alloc();
1174         if (!msg)
1175                 goto nla_put_failure;
1176
1177         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1178                     0, NL80211_CMD_DEL_INTERFACE, 0);
1179         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
1180         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
1181                 return;
1182 nla_put_failure:
1183         wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
1184 }
1185
1186
1187 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
1188                                 const char *ifname, enum nl80211_iftype iftype)
1189 {
1190         struct nl_msg *msg, *flags = NULL;
1191         int ifidx, err;
1192         int ret = -ENOBUFS;
1193
1194         msg = nlmsg_alloc();
1195         if (!msg)
1196                 return -1;
1197
1198         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1199                     0, NL80211_CMD_NEW_INTERFACE, 0);
1200         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
1201         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1202         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1203
1204         if (iftype == NL80211_IFTYPE_MONITOR) {
1205                 flags = nlmsg_alloc();
1206                 if (!flags)
1207                         goto nla_put_failure;
1208
1209                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1210
1211                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1212
1213                 nlmsg_free(flags);
1214
1215                 if (err)
1216                         goto nla_put_failure;
1217         }
1218
1219         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1220         if (ret) {
1221         nla_put_failure:
1222                 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
1223                            ret);
1224                 return ret;
1225         }
1226
1227         ifidx = if_nametoindex(ifname);
1228         if (ifidx <= 0)
1229                 return -1;
1230
1231         return ifidx;
1232 }
1233
1234
1235 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1236 {
1237         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1238         int len;
1239         unsigned char buf[3000];
1240         struct ieee80211_radiotap_iterator iter;
1241         int ret;
1242         int injected = 0, failed = 0, rxflags = 0;
1243         struct ieee80211_rx_status rx_status;
1244
1245         len = recv(sock, buf, sizeof(buf), 0);
1246         if (len < 0) {
1247                 perror("recv");
1248                 return;
1249         }
1250
1251         if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1252                 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1253                            "frame");
1254                 return;
1255         }
1256
1257         os_memset(&rx_status, 0, sizeof(rx_status));
1258
1259         while (1) {
1260                 ret = ieee80211_radiotap_iterator_next(&iter);
1261                 if (ret == -ENOENT)
1262                         break;
1263                 if (ret) {
1264                         wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1265                                    "radiotap frame (%d)", ret);
1266                         return;
1267                 }
1268                 switch (iter.this_arg_index) {
1269                 case IEEE80211_RADIOTAP_FLAGS:
1270                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1271                                 len -= 4;
1272                         break;
1273                 case IEEE80211_RADIOTAP_RX_FLAGS:
1274                         rxflags = 1;
1275                         break;
1276                 case IEEE80211_RADIOTAP_TX_FLAGS:
1277                         injected = 1;
1278                         failed = le_to_host16((*(u16 *) iter.this_arg)) &
1279                                 IEEE80211_RADIOTAP_F_TX_FAIL;
1280                         break;
1281                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1282                         break;
1283                 case IEEE80211_RADIOTAP_CHANNEL:
1284                         /* TODO convert from freq/flags to channel number
1285                          * rx_status.channel = XXX;
1286                         */
1287                         break;
1288                 case IEEE80211_RADIOTAP_RATE:
1289                         break;
1290                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1291                         rx_status.ssi = *iter.this_arg;
1292                         break;
1293                 }
1294         }
1295
1296         if (rxflags && injected)
1297                 return;
1298
1299         if (!injected) {
1300                 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1301                                       len - iter.max_length, &rx_status);
1302         } else if (failed) {
1303                 /* TX failure callback */
1304         } else {
1305                 /* TX success (ACK) callback */
1306         }
1307 }
1308
1309
1310 static int wpa_driver_nl80211_create_monitor_interface(
1311         struct wpa_driver_nl80211_data *drv)
1312 {
1313         char buf[IFNAMSIZ];
1314         struct sockaddr_ll ll;
1315         int optval, flags;
1316         socklen_t optlen;
1317
1318         os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1319         buf[IFNAMSIZ - 1] = '\0';
1320
1321         drv->monitor_ifidx =
1322                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1323
1324         if (drv->monitor_ifidx < 0)
1325                 return -1;
1326
1327         if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1328             wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1329             0) {
1330                 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1331                            "UP", buf);
1332                 goto error;
1333         }
1334
1335         os_memset(&ll, 0, sizeof(ll));
1336         ll.sll_family = AF_PACKET;
1337         ll.sll_ifindex = drv->monitor_ifidx;
1338         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1339         if (drv->monitor_sock < 0) {
1340                 perror("socket[PF_PACKET,SOCK_RAW]");
1341                 goto error;
1342         }
1343
1344         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1345                  sizeof(ll)) < 0) {
1346                 perror("monitor socket bind");
1347                 goto error;
1348         }
1349
1350         optlen = sizeof(optval);
1351         optval = 20;
1352         if (setsockopt
1353             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1354                 perror("Failed to set socket priority");
1355                 goto error;
1356         }
1357
1358         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1359                                      drv, NULL)) {
1360                 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1361                            "read socket");
1362                 goto error;
1363         }
1364
1365         return 0;
1366
1367  error:
1368         nl80211_remove_iface(drv, drv->monitor_ifidx);
1369         return -1;
1370 }
1371
1372 #endif /* CONFIG_CLIENT_MLME */
1373
1374
1375 struct wiphy_info_data {
1376         int max_scan_ssids;
1377 };
1378
1379
1380 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1381 {
1382         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1383         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1384         struct wiphy_info_data *info = arg;
1385
1386         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1387                   genlmsg_attrlen(gnlh, 0), NULL);
1388
1389         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1390                 info->max_scan_ssids =
1391                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1392
1393         return NL_SKIP;
1394 }
1395
1396
1397 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1398                                        struct wiphy_info_data *info)
1399 {
1400         struct nl_msg *msg;
1401
1402         os_memset(info, 0, sizeof(*info));
1403         msg = nlmsg_alloc();
1404         if (!msg)
1405                 return -1;
1406
1407         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1408                     0, NL80211_CMD_GET_WIPHY, 0);
1409
1410         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1411
1412         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1413                 return 0;
1414         msg = NULL;
1415 nla_put_failure:
1416         nlmsg_free(msg);
1417         return -1;
1418 }
1419
1420
1421 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1422 {
1423         struct wiphy_info_data info;
1424         if (wpa_driver_nl80211_get_info(drv, &info))
1425                 return;
1426         drv->has_capability = 1;
1427         drv->capa.max_scan_ssids = info.max_scan_ssids;
1428 }
1429
1430
1431 /**
1432  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1433  * @ctx: context to be used when calling wpa_supplicant functions,
1434  * e.g., wpa_supplicant_event()
1435  * @ifname: interface name, e.g., wlan0
1436  * Returns: Pointer to private data, %NULL on failure
1437  */
1438 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1439 {
1440         int s, ret;
1441         struct sockaddr_nl local;
1442         struct wpa_driver_nl80211_data *drv;
1443
1444         drv = os_zalloc(sizeof(*drv));
1445         if (drv == NULL)
1446                 return NULL;
1447         drv->ctx = ctx;
1448         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1449
1450         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1451         if (drv->nl_cb == NULL) {
1452                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1453                            "callbacks");
1454                 goto err1;
1455         }
1456
1457         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1458         if (drv->nl_handle == NULL) {
1459                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1460                            "callbacks");
1461                 goto err2;
1462         }
1463
1464         if (genl_connect(drv->nl_handle)) {
1465                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1466                            "netlink");
1467                 goto err3;
1468         }
1469
1470         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1471         if (drv->nl_cache == NULL) {
1472                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1473                            "netlink cache");
1474                 goto err3;
1475         }
1476
1477         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1478         if (drv->nl80211 == NULL) {
1479                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1480                            "found");
1481                 goto err4;
1482         }
1483
1484         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1485         if (ret >= 0)
1486                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1487         if (ret < 0) {
1488                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1489                            "membership for scan events: %d (%s)",
1490                            ret, strerror(-ret));
1491                 goto err4;
1492         }
1493         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1494                                  wpa_driver_nl80211_event_receive, drv, ctx);
1495
1496         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1497         if (drv->ioctl_sock < 0) {
1498                 perror("socket(PF_INET,SOCK_DGRAM)");
1499                 goto err5;
1500         }
1501
1502         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1503         if (s < 0) {
1504                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1505                 goto err6;
1506         }
1507
1508         os_memset(&local, 0, sizeof(local));
1509         local.nl_family = AF_NETLINK;
1510         local.nl_groups = RTMGRP_LINK;
1511         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1512                 perror("bind(netlink)");
1513                 close(s);
1514                 goto err6;
1515         }
1516
1517         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
1518                                  ctx);
1519         drv->wext_event_sock = s;
1520
1521         if (wpa_driver_nl80211_finish_drv_init(drv))
1522                 goto err7;
1523
1524         return drv;
1525
1526 err7:
1527         eloop_unregister_read_sock(drv->wext_event_sock);
1528         close(drv->wext_event_sock);
1529 err6:
1530         close(drv->ioctl_sock);
1531 err5:
1532         genl_family_put(drv->nl80211);
1533 err4:
1534         nl_cache_free(drv->nl_cache);
1535 err3:
1536         nl_handle_destroy(drv->nl_handle);
1537 err2:
1538         nl_cb_put(drv->nl_cb);
1539 err1:
1540         os_free(drv);
1541         return NULL;
1542 }
1543
1544
1545 static int
1546 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1547 {
1548         int flags;
1549
1550         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1551                 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1552                            drv->ifname);
1553                 return -1;
1554         }
1555         if (!(flags & IFF_UP)) {
1556                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1557                         wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1558                                    "UP", drv->ifname);
1559                         return -1;
1560                 }
1561         }
1562
1563         /*
1564          * Make sure that the driver does not have any obsolete PMKID entries.
1565          */
1566         wpa_driver_nl80211_flush_pmkid(drv);
1567
1568         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1569                 printf("Could not configure driver to use managed mode\n");
1570         }
1571
1572         wpa_driver_nl80211_get_range(drv);
1573
1574         drv->ifindex = if_nametoindex(drv->ifname);
1575
1576         wpa_driver_nl80211_capa(drv);
1577
1578         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1579
1580         return 0;
1581 }
1582
1583
1584 /**
1585  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1586  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1587  *
1588  * Shut down driver interface and processing of driver events. Free
1589  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1590  */
1591 static void wpa_driver_nl80211_deinit(void *priv)
1592 {
1593         struct wpa_driver_nl80211_data *drv = priv;
1594         int flags;
1595
1596 #ifdef CONFIG_CLIENT_MLME
1597         if (drv->monitor_sock >= 0) {
1598                 eloop_unregister_read_sock(drv->monitor_sock);
1599                 close(drv->monitor_sock);
1600         }
1601         if (drv->monitor_ifidx > 0)
1602                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1603         if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1604                 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1605 #endif /* CONFIG_CLIENT_MLME */
1606
1607         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1608
1609         /*
1610          * Clear possibly configured driver parameters in order to make it
1611          * easier to use the driver after wpa_supplicant has been terminated.
1612          */
1613         (void) wpa_driver_nl80211_set_bssid(drv,
1614                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1615
1616         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1617
1618         eloop_unregister_read_sock(drv->wext_event_sock);
1619
1620         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1621                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1622
1623         close(drv->wext_event_sock);
1624         close(drv->ioctl_sock);
1625         os_free(drv->assoc_req_ies);
1626         os_free(drv->assoc_resp_ies);
1627
1628         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1629         genl_family_put(drv->nl80211);
1630         nl_cache_free(drv->nl_cache);
1631         nl_handle_destroy(drv->nl_handle);
1632         nl_cb_put(drv->nl_cb);
1633
1634         os_free(drv);
1635 }
1636
1637
1638 /**
1639  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1640  * @eloop_ctx: Unused
1641  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1642  *
1643  * This function can be used as registered timeout when starting a scan to
1644  * generate a scan completed event if the driver does not report this.
1645  */
1646 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1647 {
1648         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1649         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1650 }
1651
1652
1653 /**
1654  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1655  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1656  * @params: Scan parameters
1657  * Returns: 0 on success, -1 on failure
1658  */
1659 static int wpa_driver_nl80211_scan(void *priv,
1660                                    struct wpa_driver_scan_params *params)
1661 {
1662         struct wpa_driver_nl80211_data *drv = priv;
1663         int ret = 0, timeout;
1664         struct nl_msg *msg, *ssids;
1665         size_t i;
1666
1667         msg = nlmsg_alloc();
1668         ssids = nlmsg_alloc();
1669         if (!msg || !ssids) {
1670                 nlmsg_free(msg);
1671                 nlmsg_free(ssids);
1672                 return -1;
1673         }
1674
1675         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1676                     NL80211_CMD_TRIGGER_SCAN, 0);
1677
1678         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1679
1680         for (i = 0; i < params->num_ssids; i++) {
1681                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1682                         params->ssids[i].ssid);
1683         }
1684         if (params->num_ssids)
1685                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1686
1687         if (params->extra_ies) {
1688                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1689                         params->extra_ies);
1690         }
1691
1692         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1693         msg = NULL;
1694         if (ret) {
1695                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1696                            "(%s)", ret, strerror(-ret));
1697                 goto nla_put_failure;
1698         }
1699
1700         /* Not all drivers generate "scan completed" wireless event, so try to
1701          * read results after a timeout. */
1702         timeout = 10;
1703         if (drv->scan_complete_events) {
1704                 /*
1705                  * The driver seems to deliver events to notify when scan is
1706                  * complete, so use longer timeout to avoid race conditions
1707                  * with scanning and following association request.
1708                  */
1709                 timeout = 30;
1710         }
1711         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1712                    "seconds", ret, timeout);
1713         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1714         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1715                                drv, drv->ctx);
1716
1717 nla_put_failure:
1718         nlmsg_free(ssids);
1719         nlmsg_free(msg);
1720         return ret;
1721 }
1722
1723
1724 static int bss_info_handler(struct nl_msg *msg, void *arg)
1725 {
1726         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1727         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1728         struct nlattr *bss[NL80211_BSS_MAX + 1];
1729         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1730                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1731                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1732                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1733                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1734                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1735                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1736                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1737                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1738         };
1739         struct wpa_scan_results *res = arg;
1740         struct wpa_scan_res **tmp;
1741         struct wpa_scan_res *r;
1742         const u8 *ie;
1743         size_t ie_len;
1744
1745         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1746                   genlmsg_attrlen(gnlh, 0), NULL);
1747         if (!tb[NL80211_ATTR_BSS])
1748                 return NL_SKIP;
1749         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1750                              bss_policy))
1751                 return NL_SKIP;
1752         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1753                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1754                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1755         } else {
1756                 ie = NULL;
1757                 ie_len = 0;
1758         }
1759
1760         r = os_zalloc(sizeof(*r) + ie_len);
1761         if (r == NULL)
1762                 return NL_SKIP;
1763         if (bss[NL80211_BSS_BSSID])
1764                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1765                           ETH_ALEN);
1766         if (bss[NL80211_BSS_FREQUENCY])
1767                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1768         if (bss[NL80211_BSS_BEACON_INTERVAL])
1769                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1770         if (bss[NL80211_BSS_CAPABILITY])
1771                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1772         if (bss[NL80211_BSS_SIGNAL_UNSPEC])
1773                 r->qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1774         if (bss[NL80211_BSS_SIGNAL_MBM])
1775                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1776         if (bss[NL80211_BSS_TSF])
1777                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1778         r->ie_len = ie_len;
1779         if (ie)
1780                 os_memcpy(r + 1, ie, ie_len);
1781
1782         tmp = os_realloc(res->res,
1783                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1784         if (tmp == NULL) {
1785                 os_free(r);
1786                 return NL_SKIP;
1787         }
1788         tmp[res->num++] = r;
1789         res->res = tmp;
1790
1791         return NL_SKIP;
1792 }
1793
1794
1795 /**
1796  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1797  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1798  * Returns: Scan results on success, -1 on failure
1799  */
1800 static struct wpa_scan_results *
1801 wpa_driver_nl80211_get_scan_results(void *priv)
1802 {
1803         struct wpa_driver_nl80211_data *drv = priv;
1804         struct nl_msg *msg;
1805         struct wpa_scan_results *res;
1806         int ret;
1807
1808         res = os_zalloc(sizeof(*res));
1809         if (res == NULL)
1810                 return 0;
1811         msg = nlmsg_alloc();
1812         if (!msg)
1813                 goto nla_put_failure;
1814
1815         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1816                     NL80211_CMD_GET_SCAN, 0);
1817         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1818
1819         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1820         msg = NULL;
1821         if (ret == 0) {
1822                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1823                            (unsigned long) res->num);
1824                 return res;
1825         }
1826         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1827                    "(%s)", ret, strerror(-ret));
1828 nla_put_failure:
1829         nlmsg_free(msg);
1830         wpa_scan_results_free(res);
1831         return NULL;
1832 }
1833
1834
1835 static int wpa_driver_nl80211_get_range(void *priv)
1836 {
1837         struct wpa_driver_nl80211_data *drv = priv;
1838         struct iw_range *range;
1839         struct iwreq iwr;
1840         int minlen;
1841         size_t buflen;
1842
1843         /*
1844          * Use larger buffer than struct iw_range in order to allow the
1845          * structure to grow in the future.
1846          */
1847         buflen = sizeof(struct iw_range) + 500;
1848         range = os_zalloc(buflen);
1849         if (range == NULL)
1850                 return -1;
1851
1852         os_memset(&iwr, 0, sizeof(iwr));
1853         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1854         iwr.u.data.pointer = (caddr_t) range;
1855         iwr.u.data.length = buflen;
1856
1857         minlen = ((char *) &range->enc_capa) - (char *) range +
1858                 sizeof(range->enc_capa);
1859
1860         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1861                 perror("ioctl[SIOCGIWRANGE]");
1862                 os_free(range);
1863                 return -1;
1864         } else if (iwr.u.data.length >= minlen &&
1865                    range->we_version_compiled >= 18) {
1866                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1867                            "WE(source)=%d enc_capa=0x%x",
1868                            range->we_version_compiled,
1869                            range->we_version_source,
1870                            range->enc_capa);
1871                 drv->has_capability = 1;
1872                 drv->we_version_compiled = range->we_version_compiled;
1873                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1874                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1875                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1876                 }
1877                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1878                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1879                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1880                 }
1881                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1882                         WPA_DRIVER_CAPA_ENC_WEP104;
1883                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1884                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1885                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1886                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1887                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1888                            drv->capa.key_mgmt, drv->capa.enc);
1889         } else {
1890                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1891                            "assuming WPA is not supported");
1892         }
1893
1894         os_free(range);
1895         return 0;
1896 }
1897
1898
1899 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1900 {
1901         struct wpa_driver_nl80211_data *drv = priv;
1902         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1903
1904         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1905                                               enabled);
1906 }
1907
1908
1909 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1910                                       const u8 *addr, int key_idx,
1911                                       int set_tx, const u8 *seq,
1912                                       size_t seq_len,
1913                                       const u8 *key, size_t key_len)
1914 {
1915         struct wpa_driver_nl80211_data *drv = priv;
1916         int err;
1917         struct nl_msg *msg;
1918
1919         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1920                    "seq_len=%lu key_len=%lu",
1921                    __func__, alg, addr, key_idx, set_tx,
1922                    (unsigned long) seq_len, (unsigned long) key_len);
1923
1924         msg = nlmsg_alloc();
1925         if (msg == NULL)
1926                 return -1;
1927
1928         if (alg == WPA_ALG_NONE) {
1929                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1930                             NL80211_CMD_DEL_KEY, 0);
1931         } else {
1932                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1933                             NL80211_CMD_NEW_KEY, 0);
1934                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1935                 switch (alg) {
1936                 case WPA_ALG_WEP:
1937                         if (key_len == 5)
1938                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1939                                             0x000FAC01);
1940                         else
1941                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1942                                             0x000FAC05);
1943                         break;
1944                 case WPA_ALG_TKIP:
1945                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1946                         break;
1947                 case WPA_ALG_CCMP:
1948                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1949                         break;
1950                 default:
1951                         nlmsg_free(msg);
1952                         return -1;
1953                 }
1954         }
1955
1956         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1957         {
1958                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1959                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1960         }
1961         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1962         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1963
1964         err = send_and_recv_msgs(drv, msg, NULL, NULL);
1965         if (err) {
1966                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1967                 return -1;
1968         }
1969
1970         if (set_tx && alg != WPA_ALG_NONE) {
1971                 msg = nlmsg_alloc();
1972                 if (msg == NULL)
1973                         return -1;
1974
1975                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1976                             0, NL80211_CMD_SET_KEY, 0);
1977                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1978                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1979                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1980
1981                 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1982                 if (err) {
1983                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
1984                                    "failed; err=%d", err);
1985                         return -1;
1986                 }
1987         }
1988
1989         return 0;
1990
1991 nla_put_failure:
1992         return -ENOBUFS;
1993 }
1994
1995
1996 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1997                                                int enabled)
1998 {
1999         struct wpa_driver_nl80211_data *drv = priv;
2000         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2001         return wpa_driver_nl80211_set_auth_param(drv,
2002                                               IW_AUTH_TKIP_COUNTERMEASURES,
2003                                               enabled);
2004 }
2005
2006
2007 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
2008                                                 int enabled)
2009 {
2010         struct wpa_driver_nl80211_data *drv = priv;
2011         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2012         drv->use_crypt = enabled;
2013         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2014                                               enabled);
2015 }
2016
2017
2018 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2019                                 const u8 *addr, int cmd, int reason_code)
2020 {
2021         struct iwreq iwr;
2022         struct iw_mlme mlme;
2023         int ret = 0;
2024
2025         os_memset(&iwr, 0, sizeof(iwr));
2026         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2027         os_memset(&mlme, 0, sizeof(mlme));
2028         mlme.cmd = cmd;
2029         mlme.reason_code = reason_code;
2030         mlme.addr.sa_family = ARPHRD_ETHER;
2031         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2032         iwr.u.data.pointer = (caddr_t) &mlme;
2033         iwr.u.data.length = sizeof(mlme);
2034
2035         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2036                 perror("ioctl[SIOCSIWMLME]");
2037                 ret = -1;
2038         }
2039
2040         return ret;
2041 }
2042
2043
2044 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2045                                           int reason_code)
2046 {
2047         struct wpa_driver_nl80211_data *drv = priv;
2048         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2049         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2050 }
2051
2052
2053 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2054                                         int reason_code)
2055 {
2056         struct wpa_driver_nl80211_data *drv = priv;
2057         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2058         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2059                                     reason_code);
2060 }
2061
2062
2063 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2064                                       size_t ie_len)
2065 {
2066         struct wpa_driver_nl80211_data *drv = priv;
2067         struct iwreq iwr;
2068         int ret = 0;
2069
2070         os_memset(&iwr, 0, sizeof(iwr));
2071         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2072         iwr.u.data.pointer = (caddr_t) ie;
2073         iwr.u.data.length = ie_len;
2074
2075         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2076                 perror("ioctl[SIOCSIWGENIE]");
2077                 ret = -1;
2078         }
2079
2080         return ret;
2081 }
2082
2083
2084 static int wpa_driver_nl80211_cipher2wext(int cipher)
2085 {
2086         switch (cipher) {
2087         case CIPHER_NONE:
2088                 return IW_AUTH_CIPHER_NONE;
2089         case CIPHER_WEP40:
2090                 return IW_AUTH_CIPHER_WEP40;
2091         case CIPHER_TKIP:
2092                 return IW_AUTH_CIPHER_TKIP;
2093         case CIPHER_CCMP:
2094                 return IW_AUTH_CIPHER_CCMP;
2095         case CIPHER_WEP104:
2096                 return IW_AUTH_CIPHER_WEP104;
2097         default:
2098                 return 0;
2099         }
2100 }
2101
2102
2103 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2104 {
2105         switch (keymgmt) {
2106         case KEY_MGMT_802_1X:
2107         case KEY_MGMT_802_1X_NO_WPA:
2108                 return IW_AUTH_KEY_MGMT_802_1X;
2109         case KEY_MGMT_PSK:
2110                 return IW_AUTH_KEY_MGMT_PSK;
2111         default:
2112                 return 0;
2113         }
2114 }
2115
2116
2117 static int
2118 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2119                                   struct wpa_driver_associate_params *params)
2120 {
2121         struct iwreq iwr;
2122         int ret = 0;
2123
2124         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2125                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2126
2127         os_memset(&iwr, 0, sizeof(iwr));
2128         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2129         /* Just changing mode, not actual keys */
2130         iwr.u.encoding.flags = 0;
2131         iwr.u.encoding.pointer = (caddr_t) NULL;
2132         iwr.u.encoding.length = 0;
2133
2134         /*
2135          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2136          * different things. Here they are used to indicate Open System vs.
2137          * Shared Key authentication algorithm. However, some drivers may use
2138          * them to select between open/restricted WEP encrypted (open = allow
2139          * both unencrypted and encrypted frames; restricted = only allow
2140          * encrypted frames).
2141          */
2142
2143         if (!drv->use_crypt) {
2144                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2145         } else {
2146                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2147                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2148                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2149                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2150         }
2151
2152         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2153                 perror("ioctl[SIOCSIWENCODE]");
2154                 ret = -1;
2155         }
2156
2157         return ret;
2158 }
2159
2160
2161 static int wpa_driver_nl80211_associate(
2162         void *priv, struct wpa_driver_associate_params *params)
2163 {
2164         struct wpa_driver_nl80211_data *drv = priv;
2165         int ret = 0;
2166         int allow_unencrypted_eapol;
2167         int value;
2168
2169         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2170
2171         /*
2172          * If the driver did not support SIOCSIWAUTH, fallback to
2173          * SIOCSIWENCODE here.
2174          */
2175         if (drv->auth_alg_fallback &&
2176             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2177                 ret = -1;
2178
2179         if (!params->bssid &&
2180             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2181                 ret = -1;
2182
2183         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2184          * from configuration, not from here, where only the selected suite is
2185          * available */
2186         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2187             < 0)
2188                 ret = -1;
2189         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2190                 value = IW_AUTH_WPA_VERSION_DISABLED;
2191         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2192                 value = IW_AUTH_WPA_VERSION_WPA2;
2193         else
2194                 value = IW_AUTH_WPA_VERSION_WPA;
2195         if (wpa_driver_nl80211_set_auth_param(drv,
2196                                            IW_AUTH_WPA_VERSION, value) < 0)
2197                 ret = -1;
2198         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2199         if (wpa_driver_nl80211_set_auth_param(drv,
2200                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2201                 ret = -1;
2202         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2203         if (wpa_driver_nl80211_set_auth_param(drv,
2204                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2205                 ret = -1;
2206         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2207         if (wpa_driver_nl80211_set_auth_param(drv,
2208                                            IW_AUTH_KEY_MGMT, value) < 0)
2209                 ret = -1;
2210         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2211                 params->pairwise_suite != CIPHER_NONE ||
2212                 params->group_suite != CIPHER_NONE ||
2213                 params->wpa_ie_len;
2214         if (wpa_driver_nl80211_set_auth_param(drv,
2215                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2216                 ret = -1;
2217
2218         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2219          * not using WPA. IEEE 802.1X specifies that these frames are not
2220          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2221         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2222             params->key_mgmt_suite == KEY_MGMT_PSK)
2223                 allow_unencrypted_eapol = 0;
2224         else
2225                 allow_unencrypted_eapol = 1;
2226
2227         if (wpa_driver_nl80211_set_auth_param(drv,
2228                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2229                                            allow_unencrypted_eapol) < 0)
2230                 ret = -1;
2231         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2232                 ret = -1;
2233         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2234                 ret = -1;
2235         if (params->bssid &&
2236             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2237                 ret = -1;
2238
2239         return ret;
2240 }
2241
2242
2243 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2244 {
2245         struct wpa_driver_nl80211_data *drv = priv;
2246         int algs = 0, res;
2247
2248         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2249                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2250         if (auth_alg & AUTH_ALG_SHARED_KEY)
2251                 algs |= IW_AUTH_ALG_SHARED_KEY;
2252         if (auth_alg & AUTH_ALG_LEAP)
2253                 algs |= IW_AUTH_ALG_LEAP;
2254         if (algs == 0) {
2255                 /* at least one algorithm should be set */
2256                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2257         }
2258
2259         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2260                                              algs);
2261         drv->auth_alg_fallback = res == -2;
2262         return res;
2263 }
2264
2265
2266 /**
2267  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2268  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2269  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2270  * Returns: 0 on success, -1 on failure
2271  */
2272 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2273 {
2274         struct wpa_driver_nl80211_data *drv = priv;
2275         int ret = -1, flags;
2276         struct nl_msg *msg;
2277
2278         msg = nlmsg_alloc();
2279         if (!msg)
2280                 return -1;
2281
2282         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2283                     0, NL80211_CMD_SET_INTERFACE, 0);
2284         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2285         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2286                     mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2287
2288         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2289         if (!ret)
2290                 return 0;
2291         else
2292                 goto try_again;
2293
2294 nla_put_failure:
2295         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
2296         return -1;
2297
2298 try_again:
2299         /* mac80211 doesn't allow mode changes while the device is up, so
2300          * take the device down, try to set the mode again, and bring the
2301          * device back up.
2302          */
2303         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2304                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2305
2306                 /* Try to set the mode again while the interface is down */
2307                 msg = nlmsg_alloc();
2308                 if (!msg)
2309                         return -1;
2310
2311                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2312                             0, NL80211_CMD_SET_INTERFACE, 0);
2313                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2314                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2315                             mode ? NL80211_IFTYPE_ADHOC :
2316                             NL80211_IFTYPE_STATION);
2317                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2318                 if (ret) {
2319                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2320                                    "mode", drv->ifname);
2321                 }
2322
2323                 /* Ignore return value of get_ifflags to ensure that the device
2324                  * is always up like it was before this function was called.
2325                  */
2326                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2327                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2328         }
2329
2330         return ret;
2331 }
2332
2333
2334 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2335                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2336 {
2337         struct iwreq iwr;
2338         struct iw_pmksa pmksa;
2339         int ret = 0;
2340
2341         os_memset(&iwr, 0, sizeof(iwr));
2342         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2343         os_memset(&pmksa, 0, sizeof(pmksa));
2344         pmksa.cmd = cmd;
2345         pmksa.bssid.sa_family = ARPHRD_ETHER;
2346         if (bssid)
2347                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2348         if (pmkid)
2349                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2350         iwr.u.data.pointer = (caddr_t) &pmksa;
2351         iwr.u.data.length = sizeof(pmksa);
2352
2353         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2354                 if (errno != EOPNOTSUPP)
2355                         perror("ioctl[SIOCSIWPMKSA]");
2356                 ret = -1;
2357         }
2358
2359         return ret;
2360 }
2361
2362
2363 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2364                                      const u8 *pmkid)
2365 {
2366         struct wpa_driver_nl80211_data *drv = priv;
2367         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2368 }
2369
2370
2371 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2372                                         const u8 *pmkid)
2373 {
2374         struct wpa_driver_nl80211_data *drv = priv;
2375         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2376 }
2377
2378
2379 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2380 {
2381         struct wpa_driver_nl80211_data *drv = priv;
2382         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2383 }
2384
2385
2386 static int wpa_driver_nl80211_get_capa(void *priv,
2387                                        struct wpa_driver_capa *capa)
2388 {
2389         struct wpa_driver_nl80211_data *drv = priv;
2390         if (!drv->has_capability)
2391                 return -1;
2392         os_memcpy(capa, &drv->capa, sizeof(*capa));
2393         return 0;
2394 }
2395
2396
2397 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2398 {
2399         struct wpa_driver_nl80211_data *drv = priv;
2400
2401         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2402                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2403         drv->operstate = state;
2404         return wpa_driver_nl80211_send_oper_ifla(
2405                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2406 }
2407
2408
2409 #ifdef CONFIG_CLIENT_MLME
2410 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2411 {
2412         if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2413                 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2414                            "MLME");
2415                 return -1;
2416         }
2417         if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2418                 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2419                            "interface");
2420                 return -1;
2421         }
2422         return 0;
2423 }
2424 #endif /* CONFIG_CLIENT_MLME */
2425
2426
2427 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2428 {
2429 #ifdef CONFIG_CLIENT_MLME
2430         struct wpa_driver_nl80211_data *drv = priv;
2431
2432         if (param == NULL)
2433                 return 0;
2434
2435         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2436
2437         if (os_strstr(param, "use_mlme=1")) {
2438                 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2439                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2440
2441                 if (wpa_driver_nl80211_open_mlme(drv))
2442                         return -1;
2443         }
2444 #endif /* CONFIG_CLIENT_MLME */
2445
2446         return 0;
2447 }
2448
2449
2450 #ifdef CONFIG_CLIENT_MLME
2451
2452 struct phy_info_arg {
2453         u16 *num_modes;
2454         struct wpa_hw_modes *modes;
2455 };
2456
2457
2458 static int phy_info_handler(struct nl_msg *msg, void *arg)
2459 {
2460         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2461         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2462         struct phy_info_arg *phy_info = arg;
2463
2464         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2465
2466         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2467         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2468                 = {
2469                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2470                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2471                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2472                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2473                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2474         };
2475
2476         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2477         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2478                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2479                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2480                 { .type = NLA_FLAG },
2481         };
2482
2483         struct nlattr *nl_band;
2484         struct nlattr *nl_freq;
2485         struct nlattr *nl_rate;
2486         int rem_band, rem_freq, rem_rate;
2487         struct wpa_hw_modes *mode;
2488         int idx, mode_is_set;
2489
2490         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2491                   genlmsg_attrlen(gnlh, 0), NULL);
2492
2493         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2494                 return NL_SKIP;
2495
2496         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2497                             rem_band) {
2498                 mode = os_realloc(phy_info->modes,
2499                                   (*phy_info->num_modes + 1) * sizeof(*mode));
2500                 if (!mode)
2501                         return NL_SKIP;
2502                 phy_info->modes = mode;
2503
2504                 mode_is_set = 0;
2505
2506                 mode = &phy_info->modes[*(phy_info->num_modes)];
2507                 os_memset(mode, 0, sizeof(*mode));
2508                 *(phy_info->num_modes) += 1;
2509
2510                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2511                           nla_len(nl_band), NULL);
2512
2513                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2514                                     rem_freq) {
2515                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2516                                   nla_data(nl_freq), nla_len(nl_freq),
2517                                   freq_policy);
2518                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2519                                 continue;
2520                         mode->num_channels++;
2521                 }
2522
2523                 mode->channels = os_zalloc(mode->num_channels *
2524                                            sizeof(struct wpa_channel_data));
2525                 if (!mode->channels)
2526                         return NL_SKIP;
2527
2528                 idx = 0;
2529
2530                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2531                                     rem_freq) {
2532                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2533                                   nla_data(nl_freq), nla_len(nl_freq),
2534                                   freq_policy);
2535                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2536                                 continue;
2537
2538                         mode->channels[idx].freq = nla_get_u32(
2539                                 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2540                         mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2541                                 WPA_CHAN_W_ACTIVE_SCAN |
2542                                 WPA_CHAN_W_IBSS;
2543
2544                         if (!mode_is_set) {
2545                                 /* crude heuristic */
2546                                 if (mode->channels[idx].freq < 4000)
2547                                         mode->mode = WPA_MODE_IEEE80211B;
2548                                 else
2549                                         mode->mode = WPA_MODE_IEEE80211A;
2550                                 mode_is_set = 1;
2551                         }
2552
2553                         /* crude heuristic */
2554                         if (mode->channels[idx].freq < 4000) {
2555                                 if (mode->channels[idx].freq == 2848)
2556                                         mode->channels[idx].chan = 14;
2557                                 else
2558                                         mode->channels[idx].chan =
2559                                                 (mode->channels[idx].freq -
2560                                                  2407) / 5;
2561                         } else
2562                                 mode->channels[idx].chan =
2563                                         mode->channels[idx].freq / 5 - 1000;
2564
2565                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2566                                 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2567                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2568                                 mode->channels[idx].flag &=
2569                                         ~WPA_CHAN_W_ACTIVE_SCAN;
2570                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2571                                 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2572                         idx++;
2573                 }
2574
2575                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2576                                     rem_rate) {
2577                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2578                                   nla_data(nl_rate), nla_len(nl_rate),
2579                                   rate_policy);
2580                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2581                                 continue;
2582                         mode->num_rates++;
2583                 }
2584
2585                 mode->rates = os_zalloc(mode->num_rates *
2586                                         sizeof(struct wpa_rate_data));
2587                 if (!mode->rates)
2588                         return NL_SKIP;
2589
2590                 idx = 0;
2591
2592                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2593                                     rem_rate) {
2594                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2595                                   nla_data(nl_rate), nla_len(nl_rate),
2596                                   rate_policy);
2597                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2598                                 continue;
2599                         mode->rates[idx].rate = nla_get_u32(
2600                                 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2601
2602                         /* crude heuristic */
2603                         if (mode->mode == WPA_MODE_IEEE80211B &&
2604                             mode->rates[idx].rate > 200)
2605                                 mode->mode = WPA_MODE_IEEE80211G;
2606
2607                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2608                                 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2609
2610                         idx++;
2611                 }
2612         }
2613
2614         return NL_SKIP;
2615 }
2616
2617
2618 static struct wpa_hw_modes *
2619 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2620 {
2621         struct wpa_driver_nl80211_data *drv = priv;
2622         struct nl_msg *msg;
2623         struct phy_info_arg result = {
2624                 .num_modes = num_modes,
2625                 .modes = NULL,
2626         };
2627
2628         *num_modes = 0;
2629         *flags = 0;
2630
2631         msg = nlmsg_alloc();
2632         if (!msg)
2633                 return NULL;
2634
2635         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2636                     0, NL80211_CMD_GET_WIPHY, 0);
2637
2638         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2639
2640         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2641                 return result.modes;
2642 nla_put_failure:
2643         return NULL;
2644 }
2645
2646
2647 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2648                                           int chan, int freq)
2649 {
2650         return wpa_driver_nl80211_set_freq(priv, freq);
2651 }
2652
2653
2654 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2655                                         size_t data_len)
2656 {
2657         struct wpa_driver_nl80211_data *drv = priv;
2658         __u8 rtap_hdr[] = {
2659                 0x00, 0x00, /* radiotap version */
2660                 0x0e, 0x00, /* radiotap length */
2661                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2662                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
2663                 0x00,       /* padding */
2664                 0x00, 0x00, /* RX and TX flags to indicate that */
2665                 0x00, 0x00, /* this is the injected frame directly */
2666         };
2667         struct iovec iov[2] = {
2668                 {
2669                         .iov_base = &rtap_hdr,
2670                         .iov_len = sizeof(rtap_hdr),
2671                 },
2672                 {
2673                         .iov_base = (void *) data,
2674                         .iov_len = data_len,
2675                 }
2676         };
2677         struct msghdr msg = {
2678                 .msg_name = NULL,
2679                 .msg_namelen = 0,
2680                 .msg_iov = iov,
2681                 .msg_iovlen = 2,
2682                 .msg_control = NULL,
2683                 .msg_controllen = 0,
2684                 .msg_flags = 0,
2685         };
2686
2687         if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2688                 perror("send[MLME]");
2689                 return -1;
2690         }
2691
2692         return 0;
2693 }
2694
2695
2696 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2697                                            const u8 *supp_rates,
2698                                            size_t supp_rates_len)
2699 {
2700         struct wpa_driver_nl80211_data *drv = priv;
2701         struct nl_msg *msg;
2702         int ret = -1;
2703
2704         msg = nlmsg_alloc();
2705         if (!msg)
2706                 return -ENOMEM;
2707
2708         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2709                     0, NL80211_CMD_NEW_STATION, 0);
2710
2711         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2712         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2713         /* TODO: Get proper Association ID and listen interval */
2714         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2715         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2716                 supp_rates);
2717         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2718
2719         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2720         /* ignore EEXIST, this happens if a STA associates while associated */
2721         if (ret == -EEXIST || ret >= 0)
2722                 ret = 0;
2723
2724 nla_put_failure:
2725         return ret;
2726 }
2727
2728
2729 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2730 {
2731         struct wpa_driver_nl80211_data *drv = priv;
2732         struct nl_msg *msg;
2733         int ret = -1;
2734
2735         msg = nlmsg_alloc();
2736         if (!msg)
2737                 return -ENOMEM;
2738
2739         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2740                     0, NL80211_CMD_DEL_STATION, 0);
2741
2742         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2743         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2744
2745         ret = 0;
2746
2747         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2748         return ret;
2749
2750 nla_put_failure:
2751         return -ENOBUFS;
2752 }
2753
2754 #endif /* CONFIG_CLIENT_MLME */
2755
2756
2757 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2758         .name = "nl80211",
2759         .desc = "Linux nl80211/cfg80211",
2760         .get_bssid = wpa_driver_nl80211_get_bssid,
2761         .get_ssid = wpa_driver_nl80211_get_ssid,
2762         .set_wpa = wpa_driver_nl80211_set_wpa,
2763         .set_key = wpa_driver_nl80211_set_key,
2764         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2765         .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2766         .scan2 = wpa_driver_nl80211_scan,
2767         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2768         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2769         .disassociate = wpa_driver_nl80211_disassociate,
2770         .set_mode = wpa_driver_nl80211_set_mode,
2771         .associate = wpa_driver_nl80211_associate,
2772         .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2773         .init = wpa_driver_nl80211_init,
2774         .deinit = wpa_driver_nl80211_deinit,
2775         .set_param = wpa_driver_nl80211_set_param,
2776         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2777         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2778         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2779         .get_capa = wpa_driver_nl80211_get_capa,
2780         .set_operstate = wpa_driver_nl80211_set_operstate,
2781         .set_country = wpa_driver_nl80211_set_country,
2782 #ifdef CONFIG_CLIENT_MLME
2783         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2784         .set_channel = wpa_driver_nl80211_set_channel,
2785         .set_ssid = wpa_driver_nl80211_set_ssid,
2786         .set_bssid = wpa_driver_nl80211_set_bssid,
2787         .send_mlme = wpa_driver_nl80211_send_mlme,
2788         .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2789         .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2790 #endif /* CONFIG_CLIENT_MLME */
2791 };