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 #include "wireless_copy.h"
  23
  24 #include "common.h"
  25 #include "driver.h"
  26 #include "eloop.h"
  27 #include "ieee802_11_defs.h"
  28
  29 #ifndef IFF_LOWER_UP
  30 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  31 #endif
  32 #ifndef IFF_DORMANT
  33 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  34 #endif
  35
  36 #ifndef IF_OPER_DORMANT
  37 #define IF_OPER_DORMANT 5
  38 #endif
  39 #ifndef IF_OPER_UP
  40 #define IF_OPER_UP 6
  41 #endif
  42
  43
  44 #ifndef NO_WEXT_COMPAT
  45 /*
  46  * Fall back to WEXT association, if the kernel does not support nl80211 MLME
  47  * commands. This is temporary backwards compatibility version that will be
  48  * removed at some point.
  49  */
  50 #define WEXT_COMPAT
  51 #endif /* NO_WEXT_COMPAT */
  52
  53
  54 struct wpa_driver_nl80211_data {
  55         void *ctx;
  56         int wext_event_sock;
  57         int ioctl_sock;
  58         char ifname[IFNAMSIZ + 1];
  59         int ifindex;
  60         int if_removed;
  61         struct wpa_driver_capa capa;
  62         int has_capability;
  63         int we_version_compiled;
  64
  65 #ifdef WEXT_COMPAT
  66         u8 *assoc_req_ies;
  67         size_t assoc_req_ies_len;
  68         u8 *assoc_resp_ies;
  69         size_t assoc_resp_ies_len;
  70
  71         /* for set_auth_alg fallback */
  72         int use_crypt;
  73         int auth_alg_fallback;
  74 #endif /* WEXT_COMPAT */
  75
  76         int operstate;
  77
  78         char mlmedev[IFNAMSIZ + 1];
  79
  80         int scan_complete_events;
  81
  82         struct nl_handle *nl_handle;
  83         struct nl_cache *nl_cache;
  84         struct nl_cb *nl_cb;
  85         struct genl_family *nl80211;
  86
  87         u8 bssid[ETH_ALEN];
  88         int associated;
  89         u8 ssid[32];
  90         size_t ssid_len;
  91 };
  92
  93
  94 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
  95                                             void *timeout_ctx);
  96 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
  97                                        int mode);
  98 #ifdef WEXT_COMPAT
  99 static int wpa_driver_nl80211_flush_pmkid(void *priv);
 100 #endif /* WEXT_COMPAT */
 101 static int wpa_driver_nl80211_get_range(void *priv);
 102 static int
 103 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 104
 105
 106 /* nl80211 code */
 107 static int ack_handler(struct nl_msg *msg, void *arg)
 108 {
 109         int *err = arg;
 110         *err = 0;
 111         return NL_STOP;
 112 }
 113
 114 static int finish_handler(struct nl_msg *msg, void *arg)
 115 {
 116         int *ret = arg;
 117         *ret = 0;
 118         return NL_SKIP;
 119 }
 120
 121 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 122                          void *arg)
 123 {
 124         int *ret = arg;
 125         *ret = err->error;
 126         return NL_SKIP;
 127 }
 128
 129 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 130                               struct nl_msg *msg,
 131                               int (*valid_handler)(struct nl_msg *, void *),
 132                               void *valid_data)
 133 {
 134         struct nl_cb *cb;
 135         int err = -ENOMEM;
 136
 137         cb = nl_cb_clone(drv->nl_cb);
 138         if (!cb)
 139                 goto out;
 140
 141         err = nl_send_auto_complete(drv->nl_handle, msg);
 142         if (err < 0)
 143                 goto out;
 144
 145         err = 1;
 146
 147         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 148         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 149         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 150
 151         if (valid_handler)
 152                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 153                           valid_handler, valid_data);
 154
 155         while (err > 0)
 156                 nl_recvmsgs(drv->nl_handle, cb);
 157  out:
 158         nl_cb_put(cb);
 159         nlmsg_free(msg);
 160         return err;
 161 }
 162
 163
 164 struct family_data {
 165         const char *group;
 166         int id;
 167 };
 168
 169
 170 static int family_handler(struct nl_msg *msg, void *arg)
 171 {
 172         struct family_data *res = arg;
 173         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 174         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 175         struct nlattr *mcgrp;
 176         int i;
 177
 178         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 179                   genlmsg_attrlen(gnlh, 0), NULL);
 180         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 181                 return NL_SKIP;
 182
 183         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 184                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 185                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 186                           nla_len(mcgrp), NULL);
 187                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 188                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 189                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 190                                res->group,
 191                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 192                         continue;
 193                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 194                 break;
 195         };
 196
 197         return NL_SKIP;
 198 }
 199
 200
 201 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 202                                const char *family, const char *group)
 203 {
 204         struct nl_msg *msg;
 205         int ret = -1;
 206         struct family_data res = { group, -ENOENT };
 207
 208         msg = nlmsg_alloc();
 209         if (!msg)
 210                 return -ENOMEM;
 211         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 212                     0, 0, CTRL_CMD_GETFAMILY, 0);
 213         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 214
 215         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 216         msg = NULL;
 217         if (ret == 0)
 218                 ret = res.id;
 219
 220 nla_put_failure:
 221         nlmsg_free(msg);
 222         return ret;
 223 }
 224
 225
 226 static int wpa_driver_nl80211_send_oper_ifla(
 227         struct wpa_driver_nl80211_data *drv,
 228         int linkmode, int operstate)
 229 {
 230         struct {
 231                 struct nlmsghdr hdr;
 232                 struct ifinfomsg ifinfo;
 233                 char opts[16];
 234         } req;
 235         struct rtattr *rta;
 236         static int nl_seq;
 237         ssize_t ret;
 238
 239         os_memset(&req, 0, sizeof(req));
 240
 241         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 242         req.hdr.nlmsg_type = RTM_SETLINK;
 243         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 244         req.hdr.nlmsg_seq = ++nl_seq;
 245         req.hdr.nlmsg_pid = 0;
 246
 247         req.ifinfo.ifi_family = AF_UNSPEC;
 248         req.ifinfo.ifi_type = 0;
 249         req.ifinfo.ifi_index = drv->ifindex;
 250         req.ifinfo.ifi_flags = 0;
 251         req.ifinfo.ifi_change = 0;
 252
 253         if (linkmode != -1) {
 254                 rta = (struct rtattr *)
 255                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 256                 rta->rta_type = IFLA_LINKMODE;
 257                 rta->rta_len = RTA_LENGTH(sizeof(char));
 258                 *((char *) RTA_DATA(rta)) = linkmode;
 259                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 260                         RTA_LENGTH(sizeof(char));
 261         }
 262         if (operstate != -1) {
 263                 rta = (struct rtattr *)
 264                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 265                 rta->rta_type = IFLA_OPERSTATE;
 266                 rta->rta_len = RTA_LENGTH(sizeof(char));
 267                 *((char *) RTA_DATA(rta)) = operstate;
 268                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 269                         RTA_LENGTH(sizeof(char));
 270         }
 271
 272         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 273                    linkmode, operstate);
 274
 275         ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
 276         if (ret < 0) {
 277                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 278                            "%s (assume operstate is not supported)",
 279                            strerror(errno));
 280         }
 281
 282         return ret < 0 ? -1 : 0;
 283 }
 284
 285
 286 static int wpa_driver_nl80211_set_auth_param(
 287         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 288 {
 289         struct iwreq iwr;
 290         int ret = 0;
 291
 292         os_memset(&iwr, 0, sizeof(iwr));
 293         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 294         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 295         iwr.u.param.value = value;
 296
 297         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 298                 if (errno != EOPNOTSUPP) {
 299                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 300                                    "value 0x%x) failed: %s)",
 301                                    idx, value, strerror(errno));
 302                 }
 303                 ret = errno == EOPNOTSUPP ? -2 : -1;
 304         }
 305
 306         return ret;
 307 }
 308
 309
 310 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 311 {
 312         struct wpa_driver_nl80211_data *drv = priv;
 313 #ifdef WEXT_COMPAT
 314         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
 315                 struct iwreq iwr;
 316                 int ret = 0;
 317
 318                 os_memset(&iwr, 0, sizeof(iwr));
 319                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 320
 321                 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 322                         perror("ioctl[SIOCGIWAP]");
 323                         ret = -1;
 324                 }
 325                 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 326
 327                 return ret;
 328         }
 329 #endif /* WEXT_COMPAT */
 330         if (!drv->associated)
 331                 return -1;
 332         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 333         return 0;
 334 }
 335
 336
 337 #ifdef WEXT_COMPAT
 338 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 339 {
 340         struct wpa_driver_nl80211_data *drv = priv;
 341         struct iwreq iwr;
 342         int ret = 0;
 343
 344         os_memset(&iwr, 0, sizeof(iwr));
 345         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 346         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 347         if (bssid)
 348                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 349         else
 350                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 351
 352         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 353                 perror("ioctl[SIOCSIWAP]");
 354                 ret = -1;
 355         }
 356
 357         return ret;
 358 }
 359 #endif /* WEXT_COMPAT */
 360
 361
 362 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 363 {
 364         struct wpa_driver_nl80211_data *drv = priv;
 365 #ifdef WEXT_COMPAT
 366         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
 367                 struct iwreq iwr;
 368                 int ret = 0;
 369
 370                 os_memset(&iwr, 0, sizeof(iwr));
 371                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 372                 iwr.u.essid.pointer = (caddr_t) ssid;
 373                 iwr.u.essid.length = 32;
 374
 375                 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 376                         perror("ioctl[SIOCGIWESSID]");
 377                         ret = -1;
 378                 } else {
 379                         ret = iwr.u.essid.length;
 380                         if (ret > 32)
 381                                 ret = 32;
 382                         /*
 383                          * Some drivers include nul termination in the SSID, so
 384                          * let's remove it here before further processing.
 385                          * WE-21 changes this to explicitly require the length
 386                          * _not_ to include nul termination.
 387                          */
 388                         if (ret > 0 && ssid[ret - 1] == '\0' &&
 389                             drv->we_version_compiled < 21)
 390                                 ret--;
 391                 }
 392
 393                 return ret;
 394         }
 395 #endif /* WEXT_COMPAT */
 396         if (!drv->associated)
 397                 return -1;
 398         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 399         return drv->ssid_len;
 400 }
 401
 402
 403 #ifdef WEXT_COMPAT
 404 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 405                                        size_t ssid_len)
 406 {
 407         struct wpa_driver_nl80211_data *drv = priv;
 408         struct iwreq iwr;
 409         int ret = 0;
 410         char buf[33];
 411
 412         if (ssid_len > 32)
 413                 return -1;
 414
 415         os_memset(&iwr, 0, sizeof(iwr));
 416         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 417         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 418         iwr.u.essid.flags = (ssid_len != 0);
 419         os_memset(buf, 0, sizeof(buf));
 420         os_memcpy(buf, ssid, ssid_len);
 421         iwr.u.essid.pointer = (caddr_t) buf;
 422         if (drv->we_version_compiled < 21) {
 423                 /* For historic reasons, set SSID length to include one extra
 424                  * character, C string nul termination, even though SSID is
 425                  * really an octet string that should not be presented as a C
 426                  * string. Some Linux drivers decrement the length by one and
 427                  * can thus end up missing the last octet of the SSID if the
 428                  * length is not incremented here. WE-21 changes this to
 429                  * explicitly require the length _not_ to include nul
 430                  * termination. */
 431                 if (ssid_len)
 432                         ssid_len++;
 433         }
 434         iwr.u.essid.length = ssid_len;
 435
 436         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 437                 perror("ioctl[SIOCSIWESSID]");
 438                 ret = -1;
 439         }
 440
 441         return ret;
 442 }
 443
 444
 445 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 446 {
 447         struct wpa_driver_nl80211_data *drv = priv;
 448         struct iwreq iwr;
 449         int ret = 0;
 450
 451         os_memset(&iwr, 0, sizeof(iwr));
 452         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 453         iwr.u.freq.m = freq * 100000;
 454         iwr.u.freq.e = 1;
 455
 456         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 457                 perror("ioctl[SIOCSIWFREQ]");
 458                 ret = -1;
 459         }
 460
 461         return ret;
 462 }
 463
 464
 465 static void
 466 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 467 {
 468         union wpa_event_data data;
 469
 470         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 471                    custom);
 472
 473         os_memset(&data, 0, sizeof(data));
 474         /* Host AP driver */
 475         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 476                 data.michael_mic_failure.unicast =
 477                         os_strstr(custom, " unicast ") != NULL;
 478                 /* TODO: parse parameters(?) */
 479                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 480         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 481                 char *spos;
 482                 int bytes;
 483
 484                 spos = custom + 17;
 485
 486                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 487                 if (!bytes || (bytes & 1))
 488                         return;
 489                 bytes /= 2;
 490
 491                 data.assoc_info.req_ies = os_malloc(bytes);
 492                 if (data.assoc_info.req_ies == NULL)
 493                         return;
 494
 495                 data.assoc_info.req_ies_len = bytes;
 496                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 497
 498                 spos += bytes * 2;
 499
 500                 data.assoc_info.resp_ies = NULL;
 501                 data.assoc_info.resp_ies_len = 0;
 502
 503                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 504                         spos += 9;
 505
 506                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 507                         if (!bytes || (bytes & 1))
 508                                 goto done;
 509                         bytes /= 2;
 510
 511                         data.assoc_info.resp_ies = os_malloc(bytes);
 512                         if (data.assoc_info.resp_ies == NULL)
 513                                 goto done;
 514
 515                         data.assoc_info.resp_ies_len = bytes;
 516                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 517                 }
 518
 519                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 520
 521         done:
 522                 os_free(data.assoc_info.resp_ies);
 523                 os_free(data.assoc_info.req_ies);
 524 #ifdef CONFIG_PEERKEY
 525         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 526                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 527                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 528                                    "STKSTART.request '%s'", custom + 17);
 529                         return;
 530                 }
 531                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 532 #endif /* CONFIG_PEERKEY */
 533         }
 534 }
 535 #endif /* WEXT_COMPAT */
 536
 537
 538 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 539         void *ctx, const char *ev, size_t len)
 540 {
 541         const struct iw_michaelmicfailure *mic;
 542         union wpa_event_data data;
 543
 544         if (len < sizeof(*mic))
 545                 return -1;
 546
 547         mic = (const struct iw_michaelmicfailure *) ev;
 548
 549         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 550                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 551                    MAC2STR(mic->src_addr.sa_data));
 552
 553         os_memset(&data, 0, sizeof(data));
 554         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 555         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 556
 557         return 0;
 558 }
 559
 560
 561 #ifdef WEXT_COMPAT
 562 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 563         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 564 {
 565         const struct iw_pmkid_cand *cand;
 566         union wpa_event_data data;
 567         const u8 *addr;
 568
 569         if (len < sizeof(*cand))
 570                 return -1;
 571
 572         cand = (const struct iw_pmkid_cand *) ev;
 573         addr = (const u8 *) cand->bssid.sa_data;
 574
 575         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 576                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 577                    cand->index, MAC2STR(addr));
 578
 579         os_memset(&data, 0, sizeof(data));
 580         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 581         data.pmkid_candidate.index = cand->index;
 582         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 583         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 584
 585         return 0;
 586 }
 587
 588
 589 static int wpa_driver_nl80211_event_wireless_assocreqie(
 590         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 591 {
 592         if (len < 0)
 593                 return -1;
 594
 595         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 596                     len);
 597         os_free(drv->assoc_req_ies);
 598         drv->assoc_req_ies = os_malloc(len);
 599         if (drv->assoc_req_ies == NULL) {
 600                 drv->assoc_req_ies_len = 0;
 601                 return -1;
 602         }
 603         os_memcpy(drv->assoc_req_ies, ev, len);
 604         drv->assoc_req_ies_len = len;
 605
 606         return 0;
 607 }
 608
 609
 610 static int wpa_driver_nl80211_event_wireless_assocrespie(
 611         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 612 {
 613         if (len < 0)
 614                 return -1;
 615
 616         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 617                     len);
 618         os_free(drv->assoc_resp_ies);
 619         drv->assoc_resp_ies = os_malloc(len);
 620         if (drv->assoc_resp_ies == NULL) {
 621                 drv->assoc_resp_ies_len = 0;
 622                 return -1;
 623         }
 624         os_memcpy(drv->assoc_resp_ies, ev, len);
 625         drv->assoc_resp_ies_len = len;
 626
 627         return 0;
 628 }
 629
 630
 631 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 632 {
 633         union wpa_event_data data;
 634
 635         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 636                 return;
 637
 638         os_memset(&data, 0, sizeof(data));
 639         if (drv->assoc_req_ies) {
 640                 data.assoc_info.req_ies = drv->assoc_req_ies;
 641                 drv->assoc_req_ies = NULL;
 642                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 643         }
 644         if (drv->assoc_resp_ies) {
 645                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 646                 drv->assoc_resp_ies = NULL;
 647                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 648         }
 649
 650         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 651
 652         os_free(data.assoc_info.req_ies);
 653         os_free(data.assoc_info.resp_ies);
 654 }
 655 #endif /* WEXT_COMPAT */
 656
 657
 658 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 659                                            void *ctx, char *data, int len)
 660 {
 661         struct iw_event iwe_buf, *iwe = &iwe_buf;
 662         char *pos, *end, *custom;
 663 #ifdef WEXT_COMPAT
 664         char *buf;
 665 #endif /* WEXT_COMPAT */
 666
 667         pos = data;
 668         end = data + len;
 669
 670         while (pos + IW_EV_LCP_LEN <= end) {
 671                 /* Event data may be unaligned, so make a local, aligned copy
 672                  * before processing. */
 673                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 674                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 675                            iwe->cmd, iwe->len);
 676                 if (iwe->len <= IW_EV_LCP_LEN)
 677                         return;
 678
 679                 custom = pos + IW_EV_POINT_LEN;
 680                 if (drv->we_version_compiled > 18 &&
 681                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 682                      iwe->cmd == IWEVCUSTOM ||
 683                      iwe->cmd == IWEVASSOCREQIE ||
 684                      iwe->cmd == IWEVASSOCRESPIE ||
 685                      iwe->cmd == IWEVPMKIDCAND)) {
 686                         /* WE-19 removed the pointer from struct iw_point */
 687                         char *dpos = (char *) &iwe_buf.u.data.length;
 688                         int dlen = dpos - (char *) &iwe_buf;
 689                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 690                                   sizeof(struct iw_event) - dlen);
 691                 } else {
 692                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 693                         custom += IW_EV_POINT_OFF;
 694                 }
 695
 696                 switch (iwe->cmd) {
 697 #ifdef WEXT_COMPAT
 698                 case SIOCGIWAP:
 699                         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
 700                                 break;
 701                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 702                                    MACSTR,
 703                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 704                         if (is_zero_ether_addr(
 705                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 706                             os_memcmp(iwe->u.ap_addr.sa_data,
 707                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 708                             0) {
 709                                 os_free(drv->assoc_req_ies);
 710                                 drv->assoc_req_ies = NULL;
 711                                 os_free(drv->assoc_resp_ies);
 712                                 drv->assoc_resp_ies = NULL;
 713                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 714                                                      NULL);
 715
 716                         } else {
 717                                 wpa_driver_nl80211_event_assoc_ies(drv);
 718                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 719                         }
 720                         break;
 721 #endif /* WEXT_COMPAT */
 722                 case IWEVMICHAELMICFAILURE:
 723                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 724                                 ctx, custom, iwe->u.data.length);
 725                         break;
 726 #ifdef WEXT_COMPAT
 727                 case IWEVCUSTOM:
 728                         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
 729                                 break;
 730                         if (custom + iwe->u.data.length > end)
 731                                 return;
 732                         buf = os_malloc(iwe->u.data.length + 1);
 733                         if (buf == NULL)
 734                                 return;
 735                         os_memcpy(buf, custom, iwe->u.data.length);
 736                         buf[iwe->u.data.length] = '\0';
 737                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 738                         os_free(buf);
 739                         break;
 740                 case IWEVASSOCREQIE:
 741                         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
 742                                 break;
 743                         wpa_driver_nl80211_event_wireless_assocreqie(
 744                                 drv, custom, iwe->u.data.length);
 745                         break;
 746                 case IWEVASSOCRESPIE:
 747                         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
 748                                 break;
 749                         wpa_driver_nl80211_event_wireless_assocrespie(
 750                                 drv, custom, iwe->u.data.length);
 751                         break;
 752                 case IWEVPMKIDCAND:
 753                         wpa_driver_nl80211_event_wireless_pmkidcand(
 754                                 drv, custom, iwe->u.data.length);
 755                         break;
 756 #endif /* WEXT_COMPAT */
 757                 }
 758
 759                 pos += iwe->len;
 760         }
 761 }
 762
 763
 764 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 765                                           void *ctx, char *buf, size_t len,
 766                                           int del)
 767 {
 768         union wpa_event_data event;
 769
 770         os_memset(&event, 0, sizeof(event));
 771         if (len > sizeof(event.interface_status.ifname))
 772                 len = sizeof(event.interface_status.ifname) - 1;
 773         os_memcpy(event.interface_status.ifname, buf, len);
 774         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 775                 EVENT_INTERFACE_ADDED;
 776
 777         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 778                    del ? "DEL" : "NEW",
 779                    event.interface_status.ifname,
 780                    del ? "removed" : "added");
 781
 782         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 783                 if (del)
 784                         drv->if_removed = 1;
 785                 else
 786                         drv->if_removed = 0;
 787         }
 788
 789         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 790 }
 791
 792
 793 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 794                                          struct nlmsghdr *h)
 795 {
 796         struct ifinfomsg *ifi;
 797         int attrlen, _nlmsg_len, rta_len;
 798         struct rtattr *attr;
 799
 800         ifi = NLMSG_DATA(h);
 801
 802         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 803
 804         attrlen = h->nlmsg_len - _nlmsg_len;
 805         if (attrlen < 0)
 806                 return 0;
 807
 808         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 809
 810         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 811         while (RTA_OK(attr, attrlen)) {
 812                 if (attr->rta_type == IFLA_IFNAME) {
 813                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 814                             == 0)
 815                                 return 1;
 816                         else
 817                                 break;
 818                 }
 819                 attr = RTA_NEXT(attr, attrlen);
 820         }
 821
 822         return 0;
 823 }
 824
 825
 826 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 827                                           int ifindex, struct nlmsghdr *h)
 828 {
 829         if (drv->ifindex == ifindex)
 830                 return 1;
 831
 832         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 833                 drv->ifindex = if_nametoindex(drv->ifname);
 834                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 835                            "interface");
 836                 wpa_driver_nl80211_finish_drv_init(drv);
 837                 return 1;
 838         }
 839
 840         return 0;
 841 }
 842
 843
 844 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 845                                               void *ctx, struct nlmsghdr *h,
 846                                               size_t len)
 847 {
 848         struct ifinfomsg *ifi;
 849         int attrlen, _nlmsg_len, rta_len;
 850         struct rtattr * attr;
 851
 852         if (len < sizeof(*ifi))
 853                 return;
 854
 855         ifi = NLMSG_DATA(h);
 856
 857         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 858                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 859                            ifi->ifi_index);
 860                 return;
 861         }
 862
 863         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 864                    "(%s%s%s%s)",
 865                    drv->operstate, ifi->ifi_flags,
 866                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 867                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 868                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 869                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 870         /*
 871          * Some drivers send the association event before the operup event--in
 872          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 873          * fails. This will hit us when wpa_supplicant does not need to do
 874          * IEEE 802.1X authentication
 875          */
 876         if (drv->operstate == 1 &&
 877             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 878             !(ifi->ifi_flags & IFF_RUNNING))
 879                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 880
 881         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 882
 883         attrlen = h->nlmsg_len - _nlmsg_len;
 884         if (attrlen < 0)
 885                 return;
 886
 887         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 888
 889         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 890         while (RTA_OK(attr, attrlen)) {
 891                 if (attr->rta_type == IFLA_WIRELESS) {
 892                         wpa_driver_nl80211_event_wireless(
 893                                 drv, ctx, ((char *) attr) + rta_len,
 894                                 attr->rta_len - rta_len);
 895                 } else if (attr->rta_type == IFLA_IFNAME) {
 896                         wpa_driver_nl80211_event_link(
 897                                 drv, ctx,
 898                                 ((char *) attr) + rta_len,
 899                                 attr->rta_len - rta_len, 0);
 900                 }
 901                 attr = RTA_NEXT(attr, attrlen);
 902         }
 903 }
 904
 905
 906 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 907                                               void *ctx, struct nlmsghdr *h,
 908                                               size_t len)
 909 {
 910         struct ifinfomsg *ifi;
 911         int attrlen, _nlmsg_len, rta_len;
 912         struct rtattr * attr;
 913
 914         if (len < sizeof(*ifi))
 915                 return;
 916
 917         ifi = NLMSG_DATA(h);
 918
 919         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 920
 921         attrlen = h->nlmsg_len - _nlmsg_len;
 922         if (attrlen < 0)
 923                 return;
 924
 925         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 926
 927         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 928         while (RTA_OK(attr, attrlen)) {
 929                 if (attr->rta_type == IFLA_IFNAME) {
 930                         wpa_driver_nl80211_event_link(
 931                                 drv, ctx,
 932                                 ((char *) attr) + rta_len,
 933                                 attr->rta_len - rta_len, 1);
 934                 }
 935                 attr = RTA_NEXT(attr, attrlen);
 936         }
 937 }
 938
 939
 940 static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
 941                                                   void *sock_ctx)
 942 {
 943         char buf[8192];
 944         int left;
 945         struct sockaddr_nl from;
 946         socklen_t fromlen;
 947         struct nlmsghdr *h;
 948         int max_events = 10;
 949
 950 try_again:
 951         fromlen = sizeof(from);
 952         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 953                         (struct sockaddr *) &from, &fromlen);
 954         if (left < 0) {
 955                 if (errno != EINTR && errno != EAGAIN)
 956                         perror("recvfrom(netlink)");
 957                 return;
 958         }
 959
 960         h = (struct nlmsghdr *) buf;
 961         while (left >= (int) sizeof(*h)) {
 962                 int len, plen;
 963
 964                 len = h->nlmsg_len;
 965                 plen = len - sizeof(*h);
 966                 if (len > left || plen < 0) {
 967                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 968                                    "len=%d left=%d plen=%d",
 969                                    len, left, plen);
 970                         break;
 971                 }
 972
 973                 switch (h->nlmsg_type) {
 974                 case RTM_NEWLINK:
 975                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 976                                                           h, plen);
 977                         break;
 978                 case RTM_DELLINK:
 979                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 980                                                           h, plen);
 981                         break;
 982                 }
 983
 984                 len = NLMSG_ALIGN(len);
 985                 left -= len;
 986                 h = (struct nlmsghdr *) ((char *) h + len);
 987         }
 988
 989         if (left > 0) {
 990                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 991                            "message", left);
 992         }
 993
 994         if (--max_events > 0) {
 995                 /*
 996                  * Try to receive all events in one eloop call in order to
 997                  * limit race condition on cases where AssocInfo event, Assoc
 998                  * event, and EAPOL frames are received more or less at the
 999                  * same time. We want to process the event messages first
1000                  * before starting EAPOL processing.
1001                  */
1002                 goto try_again;
1003         }
1004 }
1005
1006
1007 static int no_seq_check(struct nl_msg *msg, void *arg)
1008 {
1009         return NL_OK;
1010 }
1011
1012
1013 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
1014                             const u8 *frame, size_t len)
1015 {
1016         const struct ieee80211_mgmt *mgmt;
1017         union wpa_event_data event;
1018
1019         mgmt = (const struct ieee80211_mgmt *) frame;
1020         if (len < 24 + sizeof(mgmt->u.auth)) {
1021                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
1022                            "frame");
1023                 return;
1024         }
1025
1026         os_memset(&event, 0, sizeof(event));
1027         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
1028         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
1029         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
1030         if (len > 24 + sizeof(mgmt->u.auth)) {
1031                 event.auth.ies = mgmt->u.auth.variable;
1032                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
1033         }
1034
1035         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
1036 }
1037
1038
1039 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
1040                             const u8 *frame, size_t len)
1041 {
1042         const struct ieee80211_mgmt *mgmt;
1043         union wpa_event_data event;
1044         u16 status;
1045
1046         mgmt = (const struct ieee80211_mgmt *) frame;
1047         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
1048                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
1049                            "frame");
1050                 return;
1051         }
1052
1053         status = le_to_host16(mgmt->u.assoc_resp.status_code);
1054         if (status != WLAN_STATUS_SUCCESS) {
1055                 wpa_printf(MSG_DEBUG, "nl80211: Association failed: status "
1056                            "code %d", status);
1057                 /* TODO: notify SME so that things like SA Query and comeback
1058                  * time can be implemented */
1059                 return;
1060         }
1061
1062         drv->associated = 1;
1063         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
1064
1065         os_memset(&event, 0, sizeof(event));
1066         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
1067                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
1068                 event.assoc_info.resp_ies_len =
1069                         len - 24 - sizeof(mgmt->u.assoc_req);
1070         }
1071
1072         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
1073 }
1074
1075
1076 static void mlme_event(struct wpa_driver_nl80211_data *drv,
1077                        enum nl80211_commands cmd, struct nlattr *frame)
1078 {
1079         if (frame == NULL) {
1080                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
1081                            "data", cmd);
1082                 return;
1083         }
1084
1085         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
1086         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
1087                     nla_data(frame), nla_len(frame));
1088
1089         switch (cmd) {
1090         case NL80211_CMD_AUTHENTICATE:
1091                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
1092                 break;
1093         case NL80211_CMD_ASSOCIATE:
1094                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
1095                 break;
1096         case NL80211_CMD_DEAUTHENTICATE:
1097                 drv->associated = 0;
1098                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
1099                 break;
1100         case NL80211_CMD_DISASSOCIATE:
1101                 drv->associated = 0;
1102                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
1103                 break;
1104         default:
1105                 break;
1106         }
1107 }
1108
1109
1110 static int process_event(struct nl_msg *msg, void *arg)
1111 {
1112         struct wpa_driver_nl80211_data *drv = arg;
1113         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1114         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1115
1116         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1117                   genlmsg_attrlen(gnlh, 0), NULL);
1118
1119         if (tb[NL80211_ATTR_IFINDEX]) {
1120                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1121                 if (ifindex != drv->ifindex) {
1122                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1123                                    " for foreign interface (ifindex %d)",
1124                                    gnlh->cmd, ifindex);
1125                         return NL_SKIP;
1126                 }
1127         }
1128
1129         switch (gnlh->cmd) {
1130         case NL80211_CMD_NEW_SCAN_RESULTS:
1131                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1132                 drv->scan_complete_events = 1;
1133                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1134                                      drv->ctx);
1135                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1136                 break;
1137         case NL80211_CMD_SCAN_ABORTED:
1138                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1139                 /*
1140                  * Need to indicate that scan results are available in order
1141                  * not to make wpa_supplicant stop its scanning.
1142                  */
1143                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1144                                      drv->ctx);
1145                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1146                 break;
1147         case NL80211_CMD_AUTHENTICATE:
1148         case NL80211_CMD_ASSOCIATE:
1149         case NL80211_CMD_DEAUTHENTICATE:
1150         case NL80211_CMD_DISASSOCIATE:
1151                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
1152                 break;
1153         default:
1154                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1155                            "(cmd=%d)", gnlh->cmd);
1156                 break;
1157         }
1158
1159         return NL_SKIP;
1160 }
1161
1162
1163 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1164                                              void *sock_ctx)
1165 {
1166         struct nl_cb *cb;
1167         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1168
1169         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1170
1171         cb = nl_cb_clone(drv->nl_cb);
1172         if (!cb)
1173                 return;
1174         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1175         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1176         nl_recvmsgs(drv->nl_handle, cb);
1177         nl_cb_put(cb);
1178 }
1179
1180
1181 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
1182                                               const char *ifname, int *flags)
1183 {
1184         struct ifreq ifr;
1185
1186         os_memset(&ifr, 0, sizeof(ifr));
1187         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1188         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
1189                 perror("ioctl[SIOCGIFFLAGS]");
1190                 return -1;
1191         }
1192         *flags = ifr.ifr_flags & 0xffff;
1193         return 0;
1194 }
1195
1196
1197 /**
1198  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
1199  * @drv: driver_nl80211 private data
1200  * @flags: Pointer to returned flags value
1201  * Returns: 0 on success, -1 on failure
1202  */
1203 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
1204                                           int *flags)
1205 {
1206         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
1207 }
1208
1209
1210 static int wpa_driver_nl80211_set_ifflags_ifname(
1211         struct wpa_driver_nl80211_data *drv,
1212         const char *ifname, int flags)
1213 {
1214         struct ifreq ifr;
1215
1216         os_memset(&ifr, 0, sizeof(ifr));
1217         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1218         ifr.ifr_flags = flags & 0xffff;
1219         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
1220                 perror("SIOCSIFFLAGS");
1221                 return -1;
1222         }
1223         return 0;
1224 }
1225
1226
1227 /**
1228  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1229  * @drv: driver_nl80211 private data
1230  * @flags: New value for flags
1231  * Returns: 0 on success, -1 on failure
1232  */
1233 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
1234                                           int flags)
1235 {
1236         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
1237 }
1238
1239
1240 /**
1241  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1242  * @priv: driver_nl80211 private data
1243  * @alpha2_arg: country to which to switch to
1244  * Returns: 0 on success, -1 on failure
1245  *
1246  * This asks nl80211 to set the regulatory domain for given
1247  * country ISO / IEC alpha2.
1248  */
1249 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1250 {
1251         struct wpa_driver_nl80211_data *drv = priv;
1252         char alpha2[3];
1253         struct nl_msg *msg;
1254
1255         msg = nlmsg_alloc();
1256         if (!msg)
1257                 goto nla_put_failure;
1258
1259         alpha2[0] = alpha2_arg[0];
1260         alpha2[1] = alpha2_arg[1];
1261         alpha2[2] = '\0';
1262
1263         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1264                     0, NL80211_CMD_REQ_SET_REG, 0);
1265
1266         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1267         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1268                 return -EINVAL;
1269         return 0;
1270 nla_put_failure:
1271         return -EINVAL;
1272 }
1273
1274
1275 struct wiphy_info_data {
1276         int max_scan_ssids;
1277 };
1278
1279
1280 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1281 {
1282         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1283         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1284         struct wiphy_info_data *info = arg;
1285
1286         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1287                   genlmsg_attrlen(gnlh, 0), NULL);
1288
1289         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1290                 info->max_scan_ssids =
1291                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1292
1293         return NL_SKIP;
1294 }
1295
1296
1297 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1298                                        struct wiphy_info_data *info)
1299 {
1300         struct nl_msg *msg;
1301
1302         os_memset(info, 0, sizeof(*info));
1303         msg = nlmsg_alloc();
1304         if (!msg)
1305                 return -1;
1306
1307         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1308                     0, NL80211_CMD_GET_WIPHY, 0);
1309
1310         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1311
1312         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1313                 return 0;
1314         msg = NULL;
1315 nla_put_failure:
1316         nlmsg_free(msg);
1317         return -1;
1318 }
1319
1320
1321 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1322 {
1323         struct wiphy_info_data info;
1324         if (wpa_driver_nl80211_get_info(drv, &info))
1325                 return;
1326         drv->has_capability = 1;
1327         drv->capa.max_scan_ssids = info.max_scan_ssids;
1328 }
1329
1330
1331 /**
1332  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1333  * @ctx: context to be used when calling wpa_supplicant functions,
1334  * e.g., wpa_supplicant_event()
1335  * @ifname: interface name, e.g., wlan0
1336  * Returns: Pointer to private data, %NULL on failure
1337  */
1338 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1339 {
1340         int s, ret;
1341         struct sockaddr_nl local;
1342         struct wpa_driver_nl80211_data *drv;
1343
1344         drv = os_zalloc(sizeof(*drv));
1345         if (drv == NULL)
1346                 return NULL;
1347         drv->ctx = ctx;
1348         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1349
1350         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1351         if (drv->nl_cb == NULL) {
1352                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1353                            "callbacks");
1354                 goto err1;
1355         }
1356
1357         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1358         if (drv->nl_handle == NULL) {
1359                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1360                            "callbacks");
1361                 goto err2;
1362         }
1363
1364         if (genl_connect(drv->nl_handle)) {
1365                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1366                            "netlink");
1367                 goto err3;
1368         }
1369
1370         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1371         if (drv->nl_cache == NULL) {
1372                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1373                            "netlink cache");
1374                 goto err3;
1375         }
1376
1377         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1378         if (drv->nl80211 == NULL) {
1379                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1380                            "found");
1381                 goto err4;
1382         }
1383
1384         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1385         if (ret >= 0)
1386                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1387         if (ret < 0) {
1388                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1389                            "membership for scan events: %d (%s)",
1390                            ret, strerror(-ret));
1391                 goto err4;
1392         }
1393
1394         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1395         if (ret >= 0)
1396                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1397 #ifdef WEXT_COMPAT
1398         if (ret < 0) {
1399                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
1400                            "membership for mlme events: %d (%s)",
1401                            ret, strerror(-ret));
1402                 /* Use WEXT for association request */
1403         } else
1404                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1405 #else /* WEXT_COMPAT */
1406         if (ret < 0) {
1407                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1408                            "membership for mlme events: %d (%s)",
1409                            ret, strerror(-ret));
1410                 goto err4;
1411         }
1412         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1413 #endif /* WEXT_COMPAT */
1414
1415         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1416                                  wpa_driver_nl80211_event_receive, drv, ctx);
1417
1418         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1419         if (drv->ioctl_sock < 0) {
1420                 perror("socket(PF_INET,SOCK_DGRAM)");
1421                 goto err5;
1422         }
1423
1424         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1425         if (s < 0) {
1426                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1427                 goto err6;
1428         }
1429
1430         os_memset(&local, 0, sizeof(local));
1431         local.nl_family = AF_NETLINK;
1432         local.nl_groups = RTMGRP_LINK;
1433         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1434                 perror("bind(netlink)");
1435                 close(s);
1436                 goto err6;
1437         }
1438
1439         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
1440                                  ctx);
1441         drv->wext_event_sock = s;
1442
1443         if (wpa_driver_nl80211_finish_drv_init(drv))
1444                 goto err7;
1445
1446         return drv;
1447
1448 err7:
1449         eloop_unregister_read_sock(drv->wext_event_sock);
1450         close(drv->wext_event_sock);
1451 err6:
1452         close(drv->ioctl_sock);
1453 err5:
1454         genl_family_put(drv->nl80211);
1455 err4:
1456         nl_cache_free(drv->nl_cache);
1457 err3:
1458         nl_handle_destroy(drv->nl_handle);
1459 err2:
1460         nl_cb_put(drv->nl_cb);
1461 err1:
1462         os_free(drv);
1463         return NULL;
1464 }
1465
1466
1467 static int
1468 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1469 {
1470         int flags;
1471
1472         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1473                 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1474                            drv->ifname);
1475                 return -1;
1476         }
1477         if (!(flags & IFF_UP)) {
1478                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1479                         wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1480                                    "UP", drv->ifname);
1481                         return -1;
1482                 }
1483         }
1484
1485 #ifdef WEXT_COMPAT
1486         /*
1487          * Make sure that the driver does not have any obsolete PMKID entries.
1488          */
1489         wpa_driver_nl80211_flush_pmkid(drv);
1490 #endif /* WEXT_COMPAT */
1491
1492         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1493                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1494                            "use managed mode");
1495         }
1496
1497         wpa_driver_nl80211_get_range(drv);
1498
1499         drv->ifindex = if_nametoindex(drv->ifname);
1500
1501         wpa_driver_nl80211_capa(drv);
1502
1503         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1504
1505         return 0;
1506 }
1507
1508
1509 /**
1510  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1511  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1512  *
1513  * Shut down driver interface and processing of driver events. Free
1514  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1515  */
1516 static void wpa_driver_nl80211_deinit(void *priv)
1517 {
1518         struct wpa_driver_nl80211_data *drv = priv;
1519         int flags;
1520
1521         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1522
1523 #ifdef WEXT_COMPAT
1524         /*
1525          * Clear possibly configured driver parameters in order to make it
1526          * easier to use the driver after wpa_supplicant has been terminated.
1527          */
1528         (void) wpa_driver_nl80211_set_bssid(drv,
1529                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1530 #endif /* WEXT_COMPAT */
1531         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1532
1533         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1534
1535         eloop_unregister_read_sock(drv->wext_event_sock);
1536
1537         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1538                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1539
1540         close(drv->wext_event_sock);
1541         close(drv->ioctl_sock);
1542 #ifdef WEXT_COMPAT
1543         os_free(drv->assoc_req_ies);
1544         os_free(drv->assoc_resp_ies);
1545 #endif /* WEXT_COMPAT */
1546
1547         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1548         genl_family_put(drv->nl80211);
1549         nl_cache_free(drv->nl_cache);
1550         nl_handle_destroy(drv->nl_handle);
1551         nl_cb_put(drv->nl_cb);
1552
1553         os_free(drv);
1554 }
1555
1556
1557 /**
1558  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1559  * @eloop_ctx: Unused
1560  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1561  *
1562  * This function can be used as registered timeout when starting a scan to
1563  * generate a scan completed event if the driver does not report this.
1564  */
1565 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1566 {
1567         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1568         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1569 }
1570
1571
1572 /**
1573  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1574  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1575  * @params: Scan parameters
1576  * Returns: 0 on success, -1 on failure
1577  */
1578 static int wpa_driver_nl80211_scan(void *priv,
1579                                    struct wpa_driver_scan_params *params)
1580 {
1581         struct wpa_driver_nl80211_data *drv = priv;
1582         int ret = 0, timeout;
1583         struct nl_msg *msg, *ssids;
1584         size_t i;
1585
1586         msg = nlmsg_alloc();
1587         ssids = nlmsg_alloc();
1588         if (!msg || !ssids) {
1589                 nlmsg_free(msg);
1590                 nlmsg_free(ssids);
1591                 return -1;
1592         }
1593
1594         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1595                     NL80211_CMD_TRIGGER_SCAN, 0);
1596
1597         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1598
1599         for (i = 0; i < params->num_ssids; i++) {
1600                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1601                         params->ssids[i].ssid);
1602         }
1603         if (params->num_ssids)
1604                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1605
1606         if (params->extra_ies) {
1607                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1608                         params->extra_ies);
1609         }
1610
1611         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1612         msg = NULL;
1613         if (ret) {
1614                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1615                            "(%s)", ret, strerror(-ret));
1616                 goto nla_put_failure;
1617         }
1618
1619         /* Not all drivers generate "scan completed" wireless event, so try to
1620          * read results after a timeout. */
1621         timeout = 10;
1622         if (drv->scan_complete_events) {
1623                 /*
1624                  * The driver seems to deliver events to notify when scan is
1625                  * complete, so use longer timeout to avoid race conditions
1626                  * with scanning and following association request.
1627                  */
1628                 timeout = 30;
1629         }
1630         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1631                    "seconds", ret, timeout);
1632         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1633         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1634                                drv, drv->ctx);
1635
1636 nla_put_failure:
1637         nlmsg_free(ssids);
1638         nlmsg_free(msg);
1639         return ret;
1640 }
1641
1642
1643 static int bss_info_handler(struct nl_msg *msg, void *arg)
1644 {
1645         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1646         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1647         struct nlattr *bss[NL80211_BSS_MAX + 1];
1648         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1649                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1650                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1651                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1652                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1653                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1654                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1655                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1656                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1657         };
1658         struct wpa_scan_results *res = arg;
1659         struct wpa_scan_res **tmp;
1660         struct wpa_scan_res *r;
1661         const u8 *ie;
1662         size_t ie_len;
1663
1664         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1665                   genlmsg_attrlen(gnlh, 0), NULL);
1666         if (!tb[NL80211_ATTR_BSS])
1667                 return NL_SKIP;
1668         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1669                              bss_policy))
1670                 return NL_SKIP;
1671         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1672                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1673                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1674         } else {
1675                 ie = NULL;
1676                 ie_len = 0;
1677         }
1678
1679         r = os_zalloc(sizeof(*r) + ie_len);
1680         if (r == NULL)
1681                 return NL_SKIP;
1682         if (bss[NL80211_BSS_BSSID])
1683                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1684                           ETH_ALEN);
1685         if (bss[NL80211_BSS_FREQUENCY])
1686                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1687         if (bss[NL80211_BSS_BEACON_INTERVAL])
1688                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1689         if (bss[NL80211_BSS_CAPABILITY])
1690                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1691         r->flags |= WPA_SCAN_NOISE_INVALID;
1692         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1693                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1694                 r->level /= 100; /* mBm to dBm */
1695                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1696         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1697                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1698                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1699         } else
1700                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1701         if (bss[NL80211_BSS_TSF])
1702                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1703         r->ie_len = ie_len;
1704         if (ie)
1705                 os_memcpy(r + 1, ie, ie_len);
1706
1707         tmp = os_realloc(res->res,
1708                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1709         if (tmp == NULL) {
1710                 os_free(r);
1711                 return NL_SKIP;
1712         }
1713         tmp[res->num++] = r;
1714         res->res = tmp;
1715
1716         return NL_SKIP;
1717 }
1718
1719
1720 /**
1721  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1722  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1723  * Returns: Scan results on success, -1 on failure
1724  */
1725 static struct wpa_scan_results *
1726 wpa_driver_nl80211_get_scan_results(void *priv)
1727 {
1728         struct wpa_driver_nl80211_data *drv = priv;
1729         struct nl_msg *msg;
1730         struct wpa_scan_results *res;
1731         int ret;
1732
1733         res = os_zalloc(sizeof(*res));
1734         if (res == NULL)
1735                 return 0;
1736         msg = nlmsg_alloc();
1737         if (!msg)
1738                 goto nla_put_failure;
1739
1740         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1741                     NL80211_CMD_GET_SCAN, 0);
1742         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1743
1744         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1745         msg = NULL;
1746         if (ret == 0) {
1747                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1748                            (unsigned long) res->num);
1749                 return res;
1750         }
1751         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1752                    "(%s)", ret, strerror(-ret));
1753 nla_put_failure:
1754         nlmsg_free(msg);
1755         wpa_scan_results_free(res);
1756         return NULL;
1757 }
1758
1759
1760 static int wpa_driver_nl80211_get_range(void *priv)
1761 {
1762         struct wpa_driver_nl80211_data *drv = priv;
1763         struct iw_range *range;
1764         struct iwreq iwr;
1765         int minlen;
1766         size_t buflen;
1767
1768         /*
1769          * Use larger buffer than struct iw_range in order to allow the
1770          * structure to grow in the future.
1771          */
1772         buflen = sizeof(struct iw_range) + 500;
1773         range = os_zalloc(buflen);
1774         if (range == NULL)
1775                 return -1;
1776
1777         os_memset(&iwr, 0, sizeof(iwr));
1778         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1779         iwr.u.data.pointer = (caddr_t) range;
1780         iwr.u.data.length = buflen;
1781
1782         minlen = ((char *) &range->enc_capa) - (char *) range +
1783                 sizeof(range->enc_capa);
1784
1785         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1786                 perror("ioctl[SIOCGIWRANGE]");
1787                 os_free(range);
1788                 return -1;
1789         } else if (iwr.u.data.length >= minlen &&
1790                    range->we_version_compiled >= 18) {
1791                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1792                            "WE(source)=%d enc_capa=0x%x",
1793                            range->we_version_compiled,
1794                            range->we_version_source,
1795                            range->enc_capa);
1796                 drv->has_capability = 1;
1797                 drv->we_version_compiled = range->we_version_compiled;
1798                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1799                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1800                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1801                 }
1802                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1803                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1804                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1805                 }
1806                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1807                         WPA_DRIVER_CAPA_ENC_WEP104;
1808                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1809                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1810                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1811                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1812                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1813                            drv->capa.key_mgmt, drv->capa.enc);
1814         } else {
1815                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1816                            "assuming WPA is not supported");
1817         }
1818
1819         os_free(range);
1820         return 0;
1821 }
1822
1823
1824 #ifdef WEXT_COMPAT
1825 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1826 {
1827         struct wpa_driver_nl80211_data *drv = priv;
1828         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
1829                 return 0;
1830         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1831
1832         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1833                                               enabled);
1834 }
1835 #endif /* WEXT_COMPAT */
1836
1837
1838 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1839                                       const u8 *addr, int key_idx,
1840                                       int set_tx, const u8 *seq,
1841                                       size_t seq_len,
1842                                       const u8 *key, size_t key_len)
1843 {
1844         struct wpa_driver_nl80211_data *drv = priv;
1845         int err;
1846         struct nl_msg *msg;
1847
1848         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1849                    "seq_len=%lu key_len=%lu",
1850                    __func__, alg, addr, key_idx, set_tx,
1851                    (unsigned long) seq_len, (unsigned long) key_len);
1852
1853         msg = nlmsg_alloc();
1854         if (msg == NULL)
1855                 return -1;
1856
1857         if (alg == WPA_ALG_NONE) {
1858                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1859                             NL80211_CMD_DEL_KEY, 0);
1860         } else {
1861                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1862                             NL80211_CMD_NEW_KEY, 0);
1863                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1864                 switch (alg) {
1865                 case WPA_ALG_WEP:
1866                         if (key_len == 5)
1867                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1868                                             0x000FAC01);
1869                         else
1870                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1871                                             0x000FAC05);
1872                         break;
1873                 case WPA_ALG_TKIP:
1874                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1875                         break;
1876                 case WPA_ALG_CCMP:
1877                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1878                         break;
1879                 default:
1880                         nlmsg_free(msg);
1881                         return -1;
1882                 }
1883         }
1884
1885         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1886         {
1887                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1888                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1889         }
1890         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1891         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1892
1893         err = send_and_recv_msgs(drv, msg, NULL, NULL);
1894         if (err) {
1895                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1896                 return -1;
1897         }
1898
1899         if (set_tx && alg != WPA_ALG_NONE) {
1900                 msg = nlmsg_alloc();
1901                 if (msg == NULL)
1902                         return -1;
1903
1904                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1905                             0, NL80211_CMD_SET_KEY, 0);
1906                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1907                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1908                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1909
1910                 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1911                 if (err) {
1912                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
1913                                    "failed; err=%d", err);
1914                         return -1;
1915                 }
1916         }
1917
1918         return 0;
1919
1920 nla_put_failure:
1921         return -ENOBUFS;
1922 }
1923
1924
1925 #ifdef WEXT_COMPAT
1926 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1927                                                int enabled)
1928 {
1929         struct wpa_driver_nl80211_data *drv = priv;
1930         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
1931                 return 0;
1932         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1933         return wpa_driver_nl80211_set_auth_param(drv,
1934                                               IW_AUTH_TKIP_COUNTERMEASURES,
1935                                               enabled);
1936 }
1937 #endif /* WEXT_COMPAT */
1938
1939
1940 #ifdef WEXT_COMPAT
1941 static int wpa_driver_nl80211_mlme_wext(struct wpa_driver_nl80211_data *drv,
1942                                         const u8 *addr, int cmd,
1943                                         int reason_code)
1944 {
1945         struct iwreq iwr;
1946         struct iw_mlme mlme;
1947         int ret = 0;
1948
1949         os_memset(&iwr, 0, sizeof(iwr));
1950         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1951         os_memset(&mlme, 0, sizeof(mlme));
1952         mlme.cmd = cmd;
1953         mlme.reason_code = reason_code;
1954         mlme.addr.sa_family = ARPHRD_ETHER;
1955         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1956         iwr.u.data.pointer = (caddr_t) &mlme;
1957         iwr.u.data.length = sizeof(mlme);
1958
1959         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1960                 perror("ioctl[SIOCSIWMLME]");
1961                 ret = -1;
1962         }
1963
1964         return ret;
1965 }
1966 #endif /* WEXT_COMPAT */
1967
1968
1969 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1970                                    const u8 *addr, int cmd, u16 reason_code)
1971 {
1972         int ret = -1;
1973         struct nl_msg *msg;
1974
1975         msg = nlmsg_alloc();
1976         if (!msg)
1977                 return -1;
1978
1979         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1980
1981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1982         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1983         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1984
1985         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1986         msg = NULL;
1987         if (ret) {
1988                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1989                            "(%s)", ret, strerror(-ret));
1990                 goto nla_put_failure;
1991         }
1992         ret = 0;
1993
1994 nla_put_failure:
1995         nlmsg_free(msg);
1996         return ret;
1997 }
1998
1999
2000 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2001                                              int reason_code)
2002 {
2003         struct wpa_driver_nl80211_data *drv = priv;
2004         wpa_printf(MSG_DEBUG, "%s", __func__);
2005 #ifdef WEXT_COMPAT
2006         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2007                 return wpa_driver_nl80211_mlme_wext(drv, addr, IW_MLME_DEAUTH,
2008                                                     reason_code);
2009 #endif /* WEXT_COMPAT */
2010
2011         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2012                                        reason_code);
2013 }
2014
2015
2016 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2017                                            int reason_code)
2018 {
2019         struct wpa_driver_nl80211_data *drv = priv;
2020         wpa_printf(MSG_DEBUG, "%s", __func__);
2021 #ifdef WEXT_COMPAT
2022         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2023                 return wpa_driver_nl80211_mlme_wext(drv, addr,
2024                                                     IW_MLME_DISASSOC,
2025                                                     reason_code);
2026 #endif /* WEXT_COMPAT */
2027         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2028                                        reason_code);
2029 }
2030
2031
2032 #ifdef WEXT_COMPAT
2033 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2034                                       size_t ie_len)
2035 {
2036         struct wpa_driver_nl80211_data *drv = priv;
2037         struct iwreq iwr;
2038         int ret = 0;
2039
2040         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
2041                 return 0;
2042         os_memset(&iwr, 0, sizeof(iwr));
2043         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2044         iwr.u.data.pointer = (caddr_t) ie;
2045         iwr.u.data.length = ie_len;
2046
2047         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2048                 perror("ioctl[SIOCSIWGENIE]");
2049                 ret = -1;
2050         }
2051
2052         return ret;
2053 }
2054
2055
2056 static int wpa_driver_nl80211_cipher2wext(int cipher)
2057 {
2058         switch (cipher) {
2059         case CIPHER_NONE:
2060                 return IW_AUTH_CIPHER_NONE;
2061         case CIPHER_WEP40:
2062                 return IW_AUTH_CIPHER_WEP40;
2063         case CIPHER_TKIP:
2064                 return IW_AUTH_CIPHER_TKIP;
2065         case CIPHER_CCMP:
2066                 return IW_AUTH_CIPHER_CCMP;
2067         case CIPHER_WEP104:
2068                 return IW_AUTH_CIPHER_WEP104;
2069         default:
2070                 return 0;
2071         }
2072 }
2073
2074
2075 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2076 {
2077         switch (keymgmt) {
2078         case KEY_MGMT_802_1X:
2079         case KEY_MGMT_802_1X_NO_WPA:
2080                 return IW_AUTH_KEY_MGMT_802_1X;
2081         case KEY_MGMT_PSK:
2082                 return IW_AUTH_KEY_MGMT_PSK;
2083         default:
2084                 return 0;
2085         }
2086 }
2087
2088
2089 static int
2090 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2091                                   struct wpa_driver_associate_params *params)
2092 {
2093         struct iwreq iwr;
2094         int ret = 0;
2095
2096         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2097                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2098
2099         os_memset(&iwr, 0, sizeof(iwr));
2100         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2101         /* Just changing mode, not actual keys */
2102         iwr.u.encoding.flags = 0;
2103         iwr.u.encoding.pointer = (caddr_t) NULL;
2104         iwr.u.encoding.length = 0;
2105
2106         /*
2107          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2108          * different things. Here they are used to indicate Open System vs.
2109          * Shared Key authentication algorithm. However, some drivers may use
2110          * them to select between open/restricted WEP encrypted (open = allow
2111          * both unencrypted and encrypted frames; restricted = only allow
2112          * encrypted frames).
2113          */
2114
2115         if (!drv->use_crypt) {
2116                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2117         } else {
2118                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2119                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2120                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2121                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2122         }
2123
2124         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2125                 perror("ioctl[SIOCSIWENCODE]");
2126                 ret = -1;
2127         }
2128
2129         return ret;
2130 }
2131
2132
2133 static int wpa_driver_nl80211_set_auth_alg(struct wpa_driver_nl80211_data *drv,
2134                                            int auth_alg)
2135 {
2136         int algs = 0, res;
2137
2138         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2139                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2140         if (auth_alg & AUTH_ALG_SHARED_KEY)
2141                 algs |= IW_AUTH_ALG_SHARED_KEY;
2142         if (auth_alg & AUTH_ALG_LEAP)
2143                 algs |= IW_AUTH_ALG_LEAP;
2144         if (algs == 0) {
2145                 /* at least one algorithm should be set */
2146                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2147         }
2148
2149         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2150                                              algs);
2151         drv->auth_alg_fallback = res == -2;
2152         return res;
2153 }
2154
2155
2156 static int wpa_driver_nl80211_associate_wext(
2157         void *priv, struct wpa_driver_associate_params *params)
2158 {
2159         struct wpa_driver_nl80211_data *drv = priv;
2160         int ret = 0;
2161         int allow_unencrypted_eapol;
2162         int value;
2163
2164         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2165
2166         wpa_driver_nl80211_set_mode(drv, params->mode);
2167         wpa_driver_nl80211_set_auth_alg(drv, params->auth_alg);
2168
2169         /*
2170          * If the driver did not support SIOCSIWAUTH, fallback to
2171          * SIOCSIWENCODE here.
2172          */
2173         if (drv->auth_alg_fallback &&
2174             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2175                 ret = -1;
2176
2177         if (!params->bssid &&
2178             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2179                 ret = -1;
2180
2181         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2182          * from configuration, not from here, where only the selected suite is
2183          * available */
2184         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2185             < 0)
2186                 ret = -1;
2187         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2188                 value = IW_AUTH_WPA_VERSION_DISABLED;
2189         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2190                 value = IW_AUTH_WPA_VERSION_WPA2;
2191         else
2192                 value = IW_AUTH_WPA_VERSION_WPA;
2193         if (wpa_driver_nl80211_set_auth_param(drv,
2194                                            IW_AUTH_WPA_VERSION, value) < 0)
2195                 ret = -1;
2196         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2197         if (wpa_driver_nl80211_set_auth_param(drv,
2198                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2199                 ret = -1;
2200         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2201         if (wpa_driver_nl80211_set_auth_param(drv,
2202                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2203                 ret = -1;
2204         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2205         if (wpa_driver_nl80211_set_auth_param(drv,
2206                                            IW_AUTH_KEY_MGMT, value) < 0)
2207                 ret = -1;
2208         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2209                 params->pairwise_suite != CIPHER_NONE ||
2210                 params->group_suite != CIPHER_NONE ||
2211                 params->wpa_ie_len;
2212         if (wpa_driver_nl80211_set_auth_param(drv,
2213                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2214                 ret = -1;
2215
2216         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2217          * not using WPA. IEEE 802.1X specifies that these frames are not
2218          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2219         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2220             params->key_mgmt_suite == KEY_MGMT_PSK)
2221                 allow_unencrypted_eapol = 0;
2222         else
2223                 allow_unencrypted_eapol = 1;
2224
2225         if (wpa_driver_nl80211_set_auth_param(drv,
2226                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2227                                            allow_unencrypted_eapol) < 0)
2228                 ret = -1;
2229         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2230                 ret = -1;
2231         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2232                 ret = -1;
2233         if (params->bssid &&
2234             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2235                 ret = -1;
2236
2237         return ret;
2238 }
2239 #endif /* WEXT_COMPAT */
2240
2241
2242 static int wpa_driver_nl80211_authenticate(
2243         void *priv, struct wpa_driver_auth_params *params)
2244 {
2245         struct wpa_driver_nl80211_data *drv = priv;
2246         int ret = -1;
2247         struct nl_msg *msg;
2248         enum nl80211_auth_type type;
2249
2250         drv->associated = 0;
2251
2252         msg = nlmsg_alloc();
2253         if (!msg)
2254                 return -1;
2255
2256         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2257                    drv->ifindex);
2258         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2259                     NL80211_CMD_AUTHENTICATE, 0);
2260
2261         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2262         if (params->bssid) {
2263                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2264                            MAC2STR(params->bssid));
2265                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2266         }
2267         if (params->freq) {
2268                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2269                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2270         }
2271         if (params->ssid) {
2272                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2273                                   params->ssid, params->ssid_len);
2274                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2275                         params->ssid);
2276         }
2277         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2278         if (params->ie)
2279                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2280         /*
2281          * TODO: if multiple auth_alg options enabled, try them one by one if
2282          * the AP rejects authentication due to unknown auth alg
2283          */
2284         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2285                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2286         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2287                 type = NL80211_AUTHTYPE_SHARED_KEY;
2288         else if (params->auth_alg & AUTH_ALG_LEAP)
2289                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2290         else if (params->auth_alg & AUTH_ALG_FT)
2291                 type = NL80211_AUTHTYPE_FT;
2292         else
2293                 goto nla_put_failure;
2294         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2295         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2296
2297         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2298         msg = NULL;
2299         if (ret) {
2300                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2301                            "(%s)", ret, strerror(-ret));
2302                 goto nla_put_failure;
2303         }
2304         ret = 0;
2305         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2306                    "successfully");
2307
2308 nla_put_failure:
2309         nlmsg_free(msg);
2310         return ret;
2311 }
2312
2313
2314 static int wpa_driver_nl80211_associate(
2315         void *priv, struct wpa_driver_associate_params *params)
2316 {
2317         struct wpa_driver_nl80211_data *drv = priv;
2318         int ret = -1;
2319         struct nl_msg *msg;
2320
2321         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2322                                           params->drop_unencrypted);
2323
2324 #ifdef WEXT_COMPAT
2325         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2326                 return wpa_driver_nl80211_associate_wext(drv, params);
2327 #endif /* WEXT_COMPAT */
2328
2329         drv->associated = 0;
2330
2331         msg = nlmsg_alloc();
2332         if (!msg)
2333                 return -1;
2334
2335         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2336                    drv->ifindex);
2337         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2338                     NL80211_CMD_ASSOCIATE, 0);
2339
2340         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2341         if (params->bssid) {
2342                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2343                            MAC2STR(params->bssid));
2344                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2345         }
2346         if (params->freq) {
2347                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2348                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2349         }
2350         if (params->ssid) {
2351                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2352                                   params->ssid, params->ssid_len);
2353                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2354                         params->ssid);
2355                 if (params->ssid_len > sizeof(drv->ssid))
2356                         goto nla_put_failure;
2357                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2358                 drv->ssid_len = params->ssid_len;
2359         }
2360         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2361         if (params->wpa_ie)
2362                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2363                         params->wpa_ie);
2364
2365         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2366         msg = NULL;
2367         if (ret) {
2368                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2369                            "(%s)", ret, strerror(-ret));
2370                 goto nla_put_failure;
2371         }
2372         ret = 0;
2373         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2374                    "successfully");
2375
2376 nla_put_failure:
2377         nlmsg_free(msg);
2378         return ret;
2379 }
2380
2381
2382 /**
2383  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2384  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2385  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2386  * Returns: 0 on success, -1 on failure
2387  */
2388 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2389                                        int mode)
2390 {
2391         int ret = -1, flags;
2392         struct nl_msg *msg;
2393
2394         msg = nlmsg_alloc();
2395         if (!msg)
2396                 return -1;
2397
2398         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2399                     0, NL80211_CMD_SET_INTERFACE, 0);
2400         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2401         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2402                     mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2403
2404         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2405         if (!ret)
2406                 return 0;
2407         else
2408                 goto try_again;
2409
2410 nla_put_failure:
2411         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
2412         return -1;
2413
2414 try_again:
2415         /* mac80211 doesn't allow mode changes while the device is up, so
2416          * take the device down, try to set the mode again, and bring the
2417          * device back up.
2418          */
2419         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2420                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2421
2422                 /* Try to set the mode again while the interface is down */
2423                 msg = nlmsg_alloc();
2424                 if (!msg)
2425                         return -1;
2426
2427                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2428                             0, NL80211_CMD_SET_INTERFACE, 0);
2429                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2430                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2431                             mode ? NL80211_IFTYPE_ADHOC :
2432                             NL80211_IFTYPE_STATION);
2433                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2434                 if (ret) {
2435                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2436                                    "mode", drv->ifname);
2437                 }
2438
2439                 /* Ignore return value of get_ifflags to ensure that the device
2440                  * is always up like it was before this function was called.
2441                  */
2442                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2443                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2444         }
2445
2446         return ret;
2447 }
2448
2449
2450 #ifdef WEXT_COMPAT
2451
2452 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2453                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2454 {
2455         struct iwreq iwr;
2456         struct iw_pmksa pmksa;
2457         int ret = 0;
2458
2459         os_memset(&iwr, 0, sizeof(iwr));
2460         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2461         os_memset(&pmksa, 0, sizeof(pmksa));
2462         pmksa.cmd = cmd;
2463         pmksa.bssid.sa_family = ARPHRD_ETHER;
2464         if (bssid)
2465                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2466         if (pmkid)
2467                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2468         iwr.u.data.pointer = (caddr_t) &pmksa;
2469         iwr.u.data.length = sizeof(pmksa);
2470
2471         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2472                 if (errno != EOPNOTSUPP)
2473                         perror("ioctl[SIOCSIWPMKSA]");
2474                 ret = -1;
2475         }
2476
2477         return ret;
2478 }
2479
2480
2481 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2482                                      const u8 *pmkid)
2483 {
2484         struct wpa_driver_nl80211_data *drv = priv;
2485         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2486 }
2487
2488
2489 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2490                                         const u8 *pmkid)
2491 {
2492         struct wpa_driver_nl80211_data *drv = priv;
2493         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2494 }
2495
2496
2497 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2498 {
2499         struct wpa_driver_nl80211_data *drv = priv;
2500         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2501 }
2502
2503 #endif /* WEXT_COMPAT */
2504
2505
2506 static int wpa_driver_nl80211_get_capa(void *priv,
2507                                        struct wpa_driver_capa *capa)
2508 {
2509         struct wpa_driver_nl80211_data *drv = priv;
2510         if (!drv->has_capability)
2511                 return -1;
2512         os_memcpy(capa, &drv->capa, sizeof(*capa));
2513         return 0;
2514 }
2515
2516
2517 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2518 {
2519         struct wpa_driver_nl80211_data *drv = priv;
2520
2521         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2522                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2523         drv->operstate = state;
2524         return wpa_driver_nl80211_send_oper_ifla(
2525                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2526 }
2527
2528
2529 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2530         .name = "nl80211",
2531         .desc = "Linux nl80211/cfg80211",
2532         .get_bssid = wpa_driver_nl80211_get_bssid,
2533         .get_ssid = wpa_driver_nl80211_get_ssid,
2534         .set_key = wpa_driver_nl80211_set_key,
2535         .scan2 = wpa_driver_nl80211_scan,
2536         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2537         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2538         .disassociate = wpa_driver_nl80211_disassociate,
2539         .authenticate = wpa_driver_nl80211_authenticate,
2540         .associate = wpa_driver_nl80211_associate,
2541         .init = wpa_driver_nl80211_init,
2542         .deinit = wpa_driver_nl80211_deinit,
2543         .get_capa = wpa_driver_nl80211_get_capa,
2544         .set_operstate = wpa_driver_nl80211_set_operstate,
2545         .set_country = wpa_driver_nl80211_set_country,
2546 #ifdef WEXT_COMPAT
2547         .set_wpa = wpa_driver_nl80211_set_wpa,
2548         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2549         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2550         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2551         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2552 #endif /* WEXT_COMPAT */
2553 };