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 <linux/nl80211.h>
  22 #ifdef CONFIG_CLIENT_MLME
  23 #include <netpacket/packet.h>
  24 #include <linux/if_ether.h>
  25 #include "radiotap.h"
  26 #include "radiotap_iter.h"
  27 #endif /* CONFIG_CLIENT_MLME */
  28
  29 #include "wireless_copy.h"
  30 #include "common.h"
  31 #include "driver.h"
  32 #include "eloop.h"
  33 #include "ieee802_11_defs.h"
  34
  35 #ifndef IFF_LOWER_UP
  36 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  37 #endif
  38 #ifndef IFF_DORMANT
  39 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  40 #endif
  41
  42 #ifndef IF_OPER_DORMANT
  43 #define IF_OPER_DORMANT 5
  44 #endif
  45 #ifndef IF_OPER_UP
  46 #define IF_OPER_UP 6
  47 #endif
  48
  49
  50 struct wpa_driver_nl80211_data {
  51         void *ctx;
  52         int event_sock;
  53         int ioctl_sock;
  54         char ifname[IFNAMSIZ + 1];
  55         int ifindex;
  56         int if_removed;
  57         u8 *assoc_req_ies;
  58         size_t assoc_req_ies_len;
  59         u8 *assoc_resp_ies;
  60         size_t assoc_resp_ies_len;
  61         struct wpa_driver_capa capa;
  62         int has_capability;
  63         int we_version_compiled;
  64
  65         /* for set_auth_alg fallback */
  66         int use_crypt;
  67         int auth_alg_fallback;
  68
  69         int operstate;
  70
  71         char mlmedev[IFNAMSIZ + 1];
  72
  73         int scan_complete_events;
  74
  75         struct nl_handle *nl_handle;
  76         struct nl_cache *nl_cache;
  77         struct nl_cb *nl_cb;
  78         struct genl_family *nl80211;
  79
  80 #ifdef CONFIG_CLIENT_MLME
  81         int monitor_sock; /* socket for monitor */
  82         int monitor_ifidx;
  83 #endif /* CONFIG_CLIENT_MLME */
  84 };
  85
  86
  87 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
  88                                             void *timeout_ctx);
  89 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
  90 static int wpa_driver_nl80211_flush_pmkid(void *priv);
  91 static int wpa_driver_nl80211_get_range(void *priv);
  92 static void
  93 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
  94
  95
  96 /* nl80211 code */
  97 static int ack_handler(struct nl_msg *msg, void *arg)
  98 {
  99         int *err = arg;
 100         *err = 0;
 101         return NL_STOP;
 102 }
 103
 104 static int finish_handler(struct nl_msg *msg, void *arg)
 105 {
 106         int *ret = arg;
 107         *ret = 0;
 108         return NL_SKIP;
 109 }
 110
 111 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 112                          void *arg)
 113 {
 114         int *ret = arg;
 115         *ret = err->error;
 116         return NL_SKIP;
 117 }
 118
 119 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 120                               struct nl_msg *msg,
 121                               int (*valid_handler)(struct nl_msg *, void *),
 122                               void *valid_data)
 123 {
 124         struct nl_cb *cb;
 125         int err = -ENOMEM;
 126
 127         cb = nl_cb_clone(drv->nl_cb);
 128         if (!cb)
 129                 goto out;
 130
 131         err = nl_send_auto_complete(drv->nl_handle, msg);
 132         if (err < 0)
 133                 goto out;
 134
 135         err = 1;
 136
 137         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 138         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 139         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 140
 141         if (valid_handler)
 142                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 143                           valid_handler, valid_data);
 144
 145         while (err > 0)
 146                 nl_recvmsgs(drv->nl_handle, cb);
 147  out:
 148         nl_cb_put(cb);
 149         nlmsg_free(msg);
 150         return err;
 151 }
 152
 153
 154 static int wpa_driver_nl80211_send_oper_ifla(
 155         struct wpa_driver_nl80211_data *drv,
 156         int linkmode, int operstate)
 157 {
 158         struct {
 159                 struct nlmsghdr hdr;
 160                 struct ifinfomsg ifinfo;
 161                 char opts[16];
 162         } req;
 163         struct rtattr *rta;
 164         static int nl_seq;
 165         ssize_t ret;
 166
 167         os_memset(&req, 0, sizeof(req));
 168
 169         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 170         req.hdr.nlmsg_type = RTM_SETLINK;
 171         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 172         req.hdr.nlmsg_seq = ++nl_seq;
 173         req.hdr.nlmsg_pid = 0;
 174
 175         req.ifinfo.ifi_family = AF_UNSPEC;
 176         req.ifinfo.ifi_type = 0;
 177         req.ifinfo.ifi_index = drv->ifindex;
 178         req.ifinfo.ifi_flags = 0;
 179         req.ifinfo.ifi_change = 0;
 180
 181         if (linkmode != -1) {
 182                 rta = (struct rtattr *)
 183                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 184                 rta->rta_type = IFLA_LINKMODE;
 185                 rta->rta_len = RTA_LENGTH(sizeof(char));
 186                 *((char *) RTA_DATA(rta)) = linkmode;
 187                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 188                         RTA_LENGTH(sizeof(char));
 189         }
 190         if (operstate != -1) {
 191                 rta = (struct rtattr *)
 192                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 193                 rta->rta_type = IFLA_OPERSTATE;
 194                 rta->rta_len = RTA_LENGTH(sizeof(char));
 195                 *((char *) RTA_DATA(rta)) = operstate;
 196                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 197                         RTA_LENGTH(sizeof(char));
 198         }
 199
 200         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 201                    linkmode, operstate);
 202
 203         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 204         if (ret < 0) {
 205                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 206                            "%s (assume operstate is not supported)",
 207                            strerror(errno));
 208         }
 209
 210         return ret < 0 ? -1 : 0;
 211 }
 212
 213
 214 static int wpa_driver_nl80211_set_auth_param(
 215         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 216 {
 217         struct iwreq iwr;
 218         int ret = 0;
 219
 220         os_memset(&iwr, 0, sizeof(iwr));
 221         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 222         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 223         iwr.u.param.value = value;
 224
 225         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 226                 if (errno != EOPNOTSUPP) {
 227                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 228                                    "value 0x%x) failed: %s)",
 229                                    idx, value, strerror(errno));
 230                 }
 231                 ret = errno == EOPNOTSUPP ? -2 : -1;
 232         }
 233
 234         return ret;
 235 }
 236
 237
 238 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 239 {
 240         struct wpa_driver_nl80211_data *drv = priv;
 241         struct iwreq iwr;
 242         int ret = 0;
 243
 244         os_memset(&iwr, 0, sizeof(iwr));
 245         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 246
 247         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 248                 perror("ioctl[SIOCGIWAP]");
 249                 ret = -1;
 250         }
 251         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 252
 253         return ret;
 254 }
 255
 256
 257 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 258 {
 259         struct wpa_driver_nl80211_data *drv = priv;
 260         struct iwreq iwr;
 261         int ret = 0;
 262
 263         os_memset(&iwr, 0, sizeof(iwr));
 264         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 265         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 266         if (bssid)
 267                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 268         else
 269                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 270
 271         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 272                 perror("ioctl[SIOCSIWAP]");
 273                 ret = -1;
 274         }
 275
 276         return ret;
 277 }
 278
 279
 280 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 281 {
 282         struct wpa_driver_nl80211_data *drv = priv;
 283         struct iwreq iwr;
 284         int ret = 0;
 285
 286         os_memset(&iwr, 0, sizeof(iwr));
 287         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 288         iwr.u.essid.pointer = (caddr_t) ssid;
 289         iwr.u.essid.length = 32;
 290
 291         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 292                 perror("ioctl[SIOCGIWESSID]");
 293                 ret = -1;
 294         } else {
 295                 ret = iwr.u.essid.length;
 296                 if (ret > 32)
 297                         ret = 32;
 298                 /* Some drivers include nul termination in the SSID, so let's
 299                  * remove it here before further processing. WE-21 changes this
 300                  * to explicitly require the length _not_ to include nul
 301                  * termination. */
 302                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 303                     drv->we_version_compiled < 21)
 304                         ret--;
 305         }
 306
 307         return ret;
 308 }
 309
 310
 311 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 312                                        size_t ssid_len)
 313 {
 314         struct wpa_driver_nl80211_data *drv = priv;
 315         struct iwreq iwr;
 316         int ret = 0;
 317         char buf[33];
 318
 319         if (ssid_len > 32)
 320                 return -1;
 321
 322         os_memset(&iwr, 0, sizeof(iwr));
 323         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 324         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 325         iwr.u.essid.flags = (ssid_len != 0);
 326         os_memset(buf, 0, sizeof(buf));
 327         os_memcpy(buf, ssid, ssid_len);
 328         iwr.u.essid.pointer = (caddr_t) buf;
 329         if (drv->we_version_compiled < 21) {
 330                 /* For historic reasons, set SSID length to include one extra
 331                  * character, C string nul termination, even though SSID is
 332                  * really an octet string that should not be presented as a C
 333                  * string. Some Linux drivers decrement the length by one and
 334                  * can thus end up missing the last octet of the SSID if the
 335                  * length is not incremented here. WE-21 changes this to
 336                  * explicitly require the length _not_ to include nul
 337                  * termination. */
 338                 if (ssid_len)
 339                         ssid_len++;
 340         }
 341         iwr.u.essid.length = ssid_len;
 342
 343         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 344                 perror("ioctl[SIOCSIWESSID]");
 345                 ret = -1;
 346         }
 347
 348         return ret;
 349 }
 350
 351
 352 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 353 {
 354         struct wpa_driver_nl80211_data *drv = priv;
 355         struct iwreq iwr;
 356         int ret = 0;
 357
 358         os_memset(&iwr, 0, sizeof(iwr));
 359         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 360         iwr.u.freq.m = freq * 100000;
 361         iwr.u.freq.e = 1;
 362
 363         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 364                 perror("ioctl[SIOCSIWFREQ]");
 365                 ret = -1;
 366         }
 367
 368         return ret;
 369 }
 370
 371
 372 static void
 373 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 374 {
 375         union wpa_event_data data;
 376
 377         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 378                    custom);
 379
 380         os_memset(&data, 0, sizeof(data));
 381         /* Host AP driver */
 382         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 383                 data.michael_mic_failure.unicast =
 384                         os_strstr(custom, " unicast ") != NULL;
 385                 /* TODO: parse parameters(?) */
 386                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 387         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 388                 char *spos;
 389                 int bytes;
 390
 391                 spos = custom + 17;
 392
 393                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 394                 if (!bytes || (bytes & 1))
 395                         return;
 396                 bytes /= 2;
 397
 398                 data.assoc_info.req_ies = os_malloc(bytes);
 399                 if (data.assoc_info.req_ies == NULL)
 400                         return;
 401
 402                 data.assoc_info.req_ies_len = bytes;
 403                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 404
 405                 spos += bytes * 2;
 406
 407                 data.assoc_info.resp_ies = NULL;
 408                 data.assoc_info.resp_ies_len = 0;
 409
 410                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 411                         spos += 9;
 412
 413                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 414                         if (!bytes || (bytes & 1))
 415                                 goto done;
 416                         bytes /= 2;
 417
 418                         data.assoc_info.resp_ies = os_malloc(bytes);
 419                         if (data.assoc_info.resp_ies == NULL)
 420                                 goto done;
 421
 422                         data.assoc_info.resp_ies_len = bytes;
 423                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 424                 }
 425
 426                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 427
 428         done:
 429                 os_free(data.assoc_info.resp_ies);
 430                 os_free(data.assoc_info.req_ies);
 431 #ifdef CONFIG_PEERKEY
 432         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 433                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 434                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 435                                    "STKSTART.request '%s'", custom + 17);
 436                         return;
 437                 }
 438                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 439 #endif /* CONFIG_PEERKEY */
 440         }
 441 }
 442
 443
 444 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 445         void *ctx, const char *ev, size_t len)
 446 {
 447         const struct iw_michaelmicfailure *mic;
 448         union wpa_event_data data;
 449
 450         if (len < sizeof(*mic))
 451                 return -1;
 452
 453         mic = (const struct iw_michaelmicfailure *) ev;
 454
 455         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 456                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 457                    MAC2STR(mic->src_addr.sa_data));
 458
 459         os_memset(&data, 0, sizeof(data));
 460         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 461         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 462
 463         return 0;
 464 }
 465
 466
 467 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 468         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 469 {
 470         const struct iw_pmkid_cand *cand;
 471         union wpa_event_data data;
 472         const u8 *addr;
 473
 474         if (len < sizeof(*cand))
 475                 return -1;
 476
 477         cand = (const struct iw_pmkid_cand *) ev;
 478         addr = (const u8 *) cand->bssid.sa_data;
 479
 480         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 481                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 482                    cand->index, MAC2STR(addr));
 483
 484         os_memset(&data, 0, sizeof(data));
 485         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 486         data.pmkid_candidate.index = cand->index;
 487         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 488         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 489
 490         return 0;
 491 }
 492
 493
 494 static int wpa_driver_nl80211_event_wireless_assocreqie(
 495         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 496 {
 497         if (len < 0)
 498                 return -1;
 499
 500         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 501                     len);
 502         os_free(drv->assoc_req_ies);
 503         drv->assoc_req_ies = os_malloc(len);
 504         if (drv->assoc_req_ies == NULL) {
 505                 drv->assoc_req_ies_len = 0;
 506                 return -1;
 507         }
 508         os_memcpy(drv->assoc_req_ies, ev, len);
 509         drv->assoc_req_ies_len = len;
 510
 511         return 0;
 512 }
 513
 514
 515 static int wpa_driver_nl80211_event_wireless_assocrespie(
 516         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 517 {
 518         if (len < 0)
 519                 return -1;
 520
 521         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 522                     len);
 523         os_free(drv->assoc_resp_ies);
 524         drv->assoc_resp_ies = os_malloc(len);
 525         if (drv->assoc_resp_ies == NULL) {
 526                 drv->assoc_resp_ies_len = 0;
 527                 return -1;
 528         }
 529         os_memcpy(drv->assoc_resp_ies, ev, len);
 530         drv->assoc_resp_ies_len = len;
 531
 532         return 0;
 533 }
 534
 535
 536 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 537 {
 538         union wpa_event_data data;
 539
 540         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 541                 return;
 542
 543         os_memset(&data, 0, sizeof(data));
 544         if (drv->assoc_req_ies) {
 545                 data.assoc_info.req_ies = drv->assoc_req_ies;
 546                 drv->assoc_req_ies = NULL;
 547                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 548         }
 549         if (drv->assoc_resp_ies) {
 550                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 551                 drv->assoc_resp_ies = NULL;
 552                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 553         }
 554
 555         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 556
 557         os_free(data.assoc_info.req_ies);
 558         os_free(data.assoc_info.resp_ies);
 559 }
 560
 561
 562 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 563                                            void *ctx, char *data, int len)
 564 {
 565         struct iw_event iwe_buf, *iwe = &iwe_buf;
 566         char *pos, *end, *custom, *buf;
 567
 568         pos = data;
 569         end = data + len;
 570
 571         while (pos + IW_EV_LCP_LEN <= end) {
 572                 /* Event data may be unaligned, so make a local, aligned copy
 573                  * before processing. */
 574                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 575                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 576                            iwe->cmd, iwe->len);
 577                 if (iwe->len <= IW_EV_LCP_LEN)
 578                         return;
 579
 580                 custom = pos + IW_EV_POINT_LEN;
 581                 if (drv->we_version_compiled > 18 &&
 582                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 583                      iwe->cmd == IWEVCUSTOM ||
 584                      iwe->cmd == IWEVASSOCREQIE ||
 585                      iwe->cmd == IWEVASSOCRESPIE ||
 586                      iwe->cmd == IWEVPMKIDCAND)) {
 587                         /* WE-19 removed the pointer from struct iw_point */
 588                         char *dpos = (char *) &iwe_buf.u.data.length;
 589                         int dlen = dpos - (char *) &iwe_buf;
 590                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 591                                   sizeof(struct iw_event) - dlen);
 592                 } else {
 593                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 594                         custom += IW_EV_POINT_OFF;
 595                 }
 596
 597                 switch (iwe->cmd) {
 598                 case SIOCGIWAP:
 599                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 600                                    MACSTR,
 601                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 602                         if (is_zero_ether_addr(
 603                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 604                             os_memcmp(iwe->u.ap_addr.sa_data,
 605                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 606                             0) {
 607                                 os_free(drv->assoc_req_ies);
 608                                 drv->assoc_req_ies = NULL;
 609                                 os_free(drv->assoc_resp_ies);
 610                                 drv->assoc_resp_ies = NULL;
 611                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 612                                                      NULL);
 613
 614                         } else {
 615                                 wpa_driver_nl80211_event_assoc_ies(drv);
 616                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 617                         }
 618                         break;
 619                 case IWEVMICHAELMICFAILURE:
 620                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 621                                 ctx, custom, iwe->u.data.length);
 622                         break;
 623                 case IWEVCUSTOM:
 624                         if (custom + iwe->u.data.length > end)
 625                                 return;
 626                         buf = os_malloc(iwe->u.data.length + 1);
 627                         if (buf == NULL)
 628                                 return;
 629                         os_memcpy(buf, custom, iwe->u.data.length);
 630                         buf[iwe->u.data.length] = '\0';
 631                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 632                         os_free(buf);
 633                         break;
 634                 case SIOCGIWSCAN:
 635                         drv->scan_complete_events = 1;
 636                         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout,
 637                                              drv, ctx);
 638                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 639                         break;
 640                 case IWEVASSOCREQIE:
 641                         wpa_driver_nl80211_event_wireless_assocreqie(
 642                                 drv, custom, iwe->u.data.length);
 643                         break;
 644                 case IWEVASSOCRESPIE:
 645                         wpa_driver_nl80211_event_wireless_assocrespie(
 646                                 drv, custom, iwe->u.data.length);
 647                         break;
 648                 case IWEVPMKIDCAND:
 649                         wpa_driver_nl80211_event_wireless_pmkidcand(
 650                                 drv, custom, iwe->u.data.length);
 651                         break;
 652                 }
 653
 654                 pos += iwe->len;
 655         }
 656 }
 657
 658
 659 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 660                                           void *ctx, char *buf, size_t len,
 661                                           int del)
 662 {
 663         union wpa_event_data event;
 664
 665         os_memset(&event, 0, sizeof(event));
 666         if (len > sizeof(event.interface_status.ifname))
 667                 len = sizeof(event.interface_status.ifname) - 1;
 668         os_memcpy(event.interface_status.ifname, buf, len);
 669         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 670                 EVENT_INTERFACE_ADDED;
 671
 672         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 673                    del ? "DEL" : "NEW",
 674                    event.interface_status.ifname,
 675                    del ? "removed" : "added");
 676
 677         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 678                 if (del)
 679                         drv->if_removed = 1;
 680                 else
 681                         drv->if_removed = 0;
 682         }
 683
 684         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 685 }
 686
 687
 688 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 689                                          struct nlmsghdr *h)
 690 {
 691         struct ifinfomsg *ifi;
 692         int attrlen, _nlmsg_len, rta_len;
 693         struct rtattr *attr;
 694
 695         ifi = NLMSG_DATA(h);
 696
 697         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 698
 699         attrlen = h->nlmsg_len - _nlmsg_len;
 700         if (attrlen < 0)
 701                 return 0;
 702
 703         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 704
 705         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 706         while (RTA_OK(attr, attrlen)) {
 707                 if (attr->rta_type == IFLA_IFNAME) {
 708                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 709                             == 0)
 710                                 return 1;
 711                         else
 712                                 break;
 713                 }
 714                 attr = RTA_NEXT(attr, attrlen);
 715         }
 716
 717         return 0;
 718 }
 719
 720
 721 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 722                                           int ifindex, struct nlmsghdr *h)
 723 {
 724         if (drv->ifindex == ifindex)
 725                 return 1;
 726
 727         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 728                 drv->ifindex = if_nametoindex(drv->ifname);
 729                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 730                            "interface");
 731                 wpa_driver_nl80211_finish_drv_init(drv);
 732                 return 1;
 733         }
 734
 735         return 0;
 736 }
 737
 738
 739 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 740                                               void *ctx, struct nlmsghdr *h,
 741                                               size_t len)
 742 {
 743         struct ifinfomsg *ifi;
 744         int attrlen, _nlmsg_len, rta_len;
 745         struct rtattr * attr;
 746
 747         if (len < sizeof(*ifi))
 748                 return;
 749
 750         ifi = NLMSG_DATA(h);
 751
 752         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 753                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 754                            ifi->ifi_index);
 755                 return;
 756         }
 757
 758         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 759                    "(%s%s%s%s)",
 760                    drv->operstate, ifi->ifi_flags,
 761                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 762                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 763                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 764                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 765         /*
 766          * Some drivers send the association event before the operup event--in
 767          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 768          * fails. This will hit us when wpa_supplicant does not need to do
 769          * IEEE 802.1X authentication
 770          */
 771         if (drv->operstate == 1 &&
 772             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 773             !(ifi->ifi_flags & IFF_RUNNING))
 774                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 775
 776         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 777
 778         attrlen = h->nlmsg_len - _nlmsg_len;
 779         if (attrlen < 0)
 780                 return;
 781
 782         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 783
 784         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 785         while (RTA_OK(attr, attrlen)) {
 786                 if (attr->rta_type == IFLA_WIRELESS) {
 787                         wpa_driver_nl80211_event_wireless(
 788                                 drv, ctx, ((char *) attr) + rta_len,
 789                                 attr->rta_len - rta_len);
 790                 } else if (attr->rta_type == IFLA_IFNAME) {
 791                         wpa_driver_nl80211_event_link(
 792                                 drv, ctx,
 793                                 ((char *) attr) + rta_len,
 794                                 attr->rta_len - rta_len, 0);
 795                 }
 796                 attr = RTA_NEXT(attr, attrlen);
 797         }
 798 }
 799
 800
 801 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 802                                               void *ctx, struct nlmsghdr *h,
 803                                               size_t len)
 804 {
 805         struct ifinfomsg *ifi;
 806         int attrlen, _nlmsg_len, rta_len;
 807         struct rtattr * attr;
 808
 809         if (len < sizeof(*ifi))
 810                 return;
 811
 812         ifi = NLMSG_DATA(h);
 813
 814         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 815
 816         attrlen = h->nlmsg_len - _nlmsg_len;
 817         if (attrlen < 0)
 818                 return;
 819
 820         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 821
 822         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 823         while (RTA_OK(attr, attrlen)) {
 824                 if (attr->rta_type == IFLA_IFNAME) {
 825                         wpa_driver_nl80211_event_link(
 826                                 drv, ctx,
 827                                 ((char *) attr) + rta_len,
 828                                 attr->rta_len - rta_len, 1);
 829                 }
 830                 attr = RTA_NEXT(attr, attrlen);
 831         }
 832 }
 833
 834
 835 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 836                                           void *sock_ctx)
 837 {
 838         char buf[8192];
 839         int left;
 840         struct sockaddr_nl from;
 841         socklen_t fromlen;
 842         struct nlmsghdr *h;
 843         int max_events = 10;
 844
 845 try_again:
 846         fromlen = sizeof(from);
 847         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 848                         (struct sockaddr *) &from, &fromlen);
 849         if (left < 0) {
 850                 if (errno != EINTR && errno != EAGAIN)
 851                         perror("recvfrom(netlink)");
 852                 return;
 853         }
 854
 855         h = (struct nlmsghdr *) buf;
 856         while (left >= (int) sizeof(*h)) {
 857                 int len, plen;
 858
 859                 len = h->nlmsg_len;
 860                 plen = len - sizeof(*h);
 861                 if (len > left || plen < 0) {
 862                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 863                                    "len=%d left=%d plen=%d",
 864                                    len, left, plen);
 865                         break;
 866                 }
 867
 868                 switch (h->nlmsg_type) {
 869                 case RTM_NEWLINK:
 870                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 871                                                           h, plen);
 872                         break;
 873                 case RTM_DELLINK:
 874                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 875                                                           h, plen);
 876                         break;
 877                 }
 878
 879                 len = NLMSG_ALIGN(len);
 880                 left -= len;
 881                 h = (struct nlmsghdr *) ((char *) h + len);
 882         }
 883
 884         if (left > 0) {
 885                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 886                            "message", left);
 887         }
 888
 889         if (--max_events > 0) {
 890                 /*
 891                  * Try to receive all events in one eloop call in order to
 892                  * limit race condition on cases where AssocInfo event, Assoc
 893                  * event, and EAPOL frames are received more or less at the
 894                  * same time. We want to process the event messages first
 895                  * before starting EAPOL processing.
 896                  */
 897                 goto try_again;
 898         }
 899 }
 900
 901
 902 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
 903                                               const char *ifname, int *flags)
 904 {
 905         struct ifreq ifr;
 906
 907         os_memset(&ifr, 0, sizeof(ifr));
 908         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 909         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 910                 perror("ioctl[SIOCGIFFLAGS]");
 911                 return -1;
 912         }
 913         *flags = ifr.ifr_flags & 0xffff;
 914         return 0;
 915 }
 916
 917
 918 /**
 919  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 920  * @drv: driver_nl80211 private data
 921  * @flags: Pointer to returned flags value
 922  * Returns: 0 on success, -1 on failure
 923  */
 924 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
 925                                           int *flags)
 926 {
 927         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
 928 }
 929
 930
 931 static int wpa_driver_nl80211_set_ifflags_ifname(
 932         struct wpa_driver_nl80211_data *drv,
 933         const char *ifname, int flags)
 934 {
 935         struct ifreq ifr;
 936
 937         os_memset(&ifr, 0, sizeof(ifr));
 938         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 939         ifr.ifr_flags = flags & 0xffff;
 940         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 941                 perror("SIOCSIFFLAGS");
 942                 return -1;
 943         }
 944         return 0;
 945 }
 946
 947
 948 /**
 949  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 950  * @drv: driver_nl80211 private data
 951  * @flags: New value for flags
 952  * Returns: 0 on success, -1 on failure
 953  */
 954 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
 955                                           int flags)
 956 {
 957         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
 958 }
 959
 960
 961 #ifdef CONFIG_CLIENT_MLME
 962
 963 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
 964                            int drop_unencrypted, int userspace_mlme)
 965 {
 966 #ifdef NL80211_CMD_SET_VIF
 967         struct nl_msg *msg;
 968         int ret = -1;
 969
 970         msg = nlmsg_alloc();
 971         if (!msg)
 972                 return -ENOMEM;
 973
 974         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
 975                     NL80211_CMD_SET_VIF, 0);
 976
 977         if (drop_unencrypted >= 0)
 978                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
 979                            drop_unencrypted);
 980         if (userspace_mlme >= 0)
 981                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
 982                            userspace_mlme);
 983
 984         ret = 0;
 985
 986         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 987
 988         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 989         return ret;
 990
 991 nla_put_failure:
 992         return -ENOBUFS;
 993 #else /* NL80211_CMD_SET_VIF */
 994         return -1;
 995 #endif /* NL80211_CMD_SET_VIF */
 996 }
 997
 998
 999 static int wpa_driver_nl80211_set_userspace_mlme(
1000         struct wpa_driver_nl80211_data *drv, int enabled)
1001 {
1002         return nl80211_set_vif(drv, -1, enabled);
1003 }
1004
1005
1006 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
1007                                  int ifidx)
1008 {
1009         struct nl_msg *msg;
1010
1011         msg = nlmsg_alloc();
1012         if (!msg)
1013                 goto nla_put_failure;
1014
1015         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1016                     0, NL80211_CMD_DEL_INTERFACE, 0);
1017         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
1018         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
1019                 return;
1020 nla_put_failure:
1021         wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
1022 }
1023
1024
1025 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
1026                                 const char *ifname, enum nl80211_iftype iftype)
1027 {
1028         struct nl_msg *msg, *flags = NULL;
1029         int ifidx, err;
1030         int ret = -ENOBUFS;
1031
1032         msg = nlmsg_alloc();
1033         if (!msg)
1034                 return -1;
1035
1036         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1037                     0, NL80211_CMD_NEW_INTERFACE, 0);
1038         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
1039         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1040         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1041
1042         if (iftype == NL80211_IFTYPE_MONITOR) {
1043                 flags = nlmsg_alloc();
1044                 if (!flags)
1045                         goto nla_put_failure;
1046
1047                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1048
1049                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1050
1051                 nlmsg_free(flags);
1052
1053                 if (err)
1054                         goto nla_put_failure;
1055         }
1056
1057         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1058         if (ret) {
1059         nla_put_failure:
1060                 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
1061                            ret);
1062                 return ret;
1063         }
1064
1065         ifidx = if_nametoindex(ifname);
1066         if (ifidx <= 0)
1067                 return -1;
1068
1069         return ifidx;
1070 }
1071
1072
1073 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1074 {
1075         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1076         int len;
1077         unsigned char buf[3000];
1078         struct ieee80211_radiotap_iterator iter;
1079         int ret;
1080         int injected = 0, failed = 0, rxflags = 0;
1081         struct ieee80211_rx_status rx_status;
1082
1083         len = recv(sock, buf, sizeof(buf), 0);
1084         if (len < 0) {
1085                 perror("recv");
1086                 return;
1087         }
1088
1089         if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1090                 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1091                            "frame");
1092                 return;
1093         }
1094
1095         os_memset(&rx_status, 0, sizeof(rx_status));
1096
1097         while (1) {
1098                 ret = ieee80211_radiotap_iterator_next(&iter);
1099                 if (ret == -ENOENT)
1100                         break;
1101                 if (ret) {
1102                         wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1103                                    "radiotap frame (%d)", ret);
1104                         return;
1105                 }
1106                 switch (iter.this_arg_index) {
1107                 case IEEE80211_RADIOTAP_FLAGS:
1108                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1109                                 len -= 4;
1110                         break;
1111                 case IEEE80211_RADIOTAP_RX_FLAGS:
1112                         rxflags = 1;
1113                         break;
1114                 case IEEE80211_RADIOTAP_TX_FLAGS:
1115                         injected = 1;
1116                         failed = le_to_host16((*(u16 *) iter.this_arg)) &
1117                                 IEEE80211_RADIOTAP_F_TX_FAIL;
1118                         break;
1119                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1120                         break;
1121                 case IEEE80211_RADIOTAP_CHANNEL:
1122                         /* TODO convert from freq/flags to channel number
1123                          * rx_status.channel = XXX;
1124                         */
1125                         break;
1126                 case IEEE80211_RADIOTAP_RATE:
1127                         break;
1128                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1129                         rx_status.ssi = *iter.this_arg;
1130                         break;
1131                 }
1132         }
1133
1134         if (rxflags && injected)
1135                 return;
1136
1137         if (!injected) {
1138                 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1139                                       len - iter.max_length, &rx_status);
1140         } else if (failed) {
1141                 /* TX failure callback */
1142         } else {
1143                 /* TX success (ACK) callback */
1144         }
1145 }
1146
1147
1148 static int wpa_driver_nl80211_create_monitor_interface(
1149         struct wpa_driver_nl80211_data *drv)
1150 {
1151         char buf[IFNAMSIZ];
1152         struct sockaddr_ll ll;
1153         int optval, flags;
1154         socklen_t optlen;
1155
1156         os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1157         buf[IFNAMSIZ - 1] = '\0';
1158
1159         drv->monitor_ifidx =
1160                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1161
1162         if (drv->monitor_ifidx < 0)
1163                 return -1;
1164
1165         if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1166             wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1167             0) {
1168                 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1169                            "UP", buf);
1170                 goto error;
1171         }
1172
1173         os_memset(&ll, 0, sizeof(ll));
1174         ll.sll_family = AF_PACKET;
1175         ll.sll_ifindex = drv->monitor_ifidx;
1176         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1177         if (drv->monitor_sock < 0) {
1178                 perror("socket[PF_PACKET,SOCK_RAW]");
1179                 goto error;
1180         }
1181
1182         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1183                  sizeof(ll)) < 0) {
1184                 perror("monitor socket bind");
1185                 goto error;
1186         }
1187
1188         optlen = sizeof(optval);
1189         optval = 20;
1190         if (setsockopt
1191             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1192                 perror("Failed to set socket priority");
1193                 goto error;
1194         }
1195
1196         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1197                                      drv, NULL)) {
1198                 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1199                            "read socket");
1200                 goto error;
1201         }
1202
1203         return 0;
1204
1205  error:
1206         nl80211_remove_iface(drv, drv->monitor_ifidx);
1207         return -1;
1208 }
1209
1210 #endif /* CONFIG_CLIENT_MLME */
1211
1212
1213 /**
1214  * wpa_driver_nl80211_init - Initialize WE driver interface
1215  * @ctx: context to be used when calling wpa_supplicant functions,
1216  * e.g., wpa_supplicant_event()
1217  * @ifname: interface name, e.g., wlan0
1218  * Returns: Pointer to private data, %NULL on failure
1219  */
1220 void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1221 {
1222         int s;
1223         struct sockaddr_nl local;
1224         struct wpa_driver_nl80211_data *drv;
1225
1226         drv = os_zalloc(sizeof(*drv));
1227         if (drv == NULL)
1228                 return NULL;
1229         drv->ctx = ctx;
1230         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1231
1232         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1233         if (drv->nl_cb == NULL) {
1234                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1235                            "callbacks");
1236                 goto err1;
1237         }
1238
1239         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1240         if (drv->nl_handle == NULL) {
1241                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1242                            "callbacks");
1243                 goto err2;
1244         }
1245
1246         if (genl_connect(drv->nl_handle)) {
1247                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1248                            "netlink");
1249                 goto err3;
1250         }
1251
1252         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1253         if (drv->nl_cache == NULL) {
1254                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1255                            "netlink cache");
1256                 goto err3;
1257         }
1258
1259         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1260         if (drv->nl80211 == NULL) {
1261                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1262                            "found");
1263                 goto err4;
1264         }
1265
1266         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1267         if (drv->ioctl_sock < 0) {
1268                 perror("socket(PF_INET,SOCK_DGRAM)");
1269                 goto err5;
1270         }
1271
1272         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1273         if (s < 0) {
1274                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1275                 goto err6;
1276         }
1277
1278         os_memset(&local, 0, sizeof(local));
1279         local.nl_family = AF_NETLINK;
1280         local.nl_groups = RTMGRP_LINK;
1281         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1282                 perror("bind(netlink)");
1283                 close(s);
1284                 goto err6;
1285         }
1286
1287         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive, drv,
1288                                  ctx);
1289         drv->event_sock = s;
1290
1291         wpa_driver_nl80211_finish_drv_init(drv);
1292
1293         return drv;
1294
1295 err6:
1296         close(drv->ioctl_sock);
1297 err5:
1298         genl_family_put(drv->nl80211);
1299 err4:
1300         nl_cache_free(drv->nl_cache);
1301 err3:
1302         nl_handle_destroy(drv->nl_handle);
1303 err2:
1304         nl_cb_put(drv->nl_cb);
1305 err1:
1306         os_free(drv);
1307         return NULL;
1308 }
1309
1310
1311 static void
1312 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1313 {
1314         int flags;
1315
1316         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
1317                 printf("Could not get interface '%s' flags\n", drv->ifname);
1318         else if (!(flags & IFF_UP)) {
1319                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1320                         printf("Could not set interface '%s' UP\n",
1321                                drv->ifname);
1322                 } else {
1323                         /*
1324                          * Wait some time to allow driver to initialize before
1325                          * starting configuring the driver. This seems to be
1326                          * needed at least some drivers that load firmware etc.
1327                          * when the interface is set up.
1328                          */
1329                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1330                                    "a second for the driver to complete "
1331                                    "initialization", drv->ifname);
1332                         sleep(1);
1333                 }
1334         }
1335
1336         /*
1337          * Make sure that the driver does not have any obsolete PMKID entries.
1338          */
1339         wpa_driver_nl80211_flush_pmkid(drv);
1340
1341         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1342                 printf("Could not configure driver to use managed mode\n");
1343         }
1344
1345         wpa_driver_nl80211_get_range(drv);
1346
1347         drv->ifindex = if_nametoindex(drv->ifname);
1348
1349         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1350 }
1351
1352
1353 /**
1354  * wpa_driver_nl80211_deinit - Deinitialize WE driver interface
1355  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1356  *
1357  * Shut down driver interface and processing of driver events. Free
1358  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1359  */
1360 void wpa_driver_nl80211_deinit(void *priv)
1361 {
1362         struct wpa_driver_nl80211_data *drv = priv;
1363         int flags;
1364
1365 #ifdef CONFIG_CLIENT_MLME
1366         if (drv->monitor_sock >= 0) {
1367                 eloop_unregister_read_sock(drv->monitor_sock);
1368                 close(drv->monitor_sock);
1369         }
1370         if (drv->monitor_ifidx > 0)
1371                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1372         if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1373                 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1374 #endif /* CONFIG_CLIENT_MLME */
1375
1376         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1377
1378         /*
1379          * Clear possibly configured driver parameters in order to make it
1380          * easier to use the driver after wpa_supplicant has been terminated.
1381          */
1382         (void) wpa_driver_nl80211_set_bssid(drv,
1383                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1384
1385         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1386
1387         eloop_unregister_read_sock(drv->event_sock);
1388
1389         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1390                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1391
1392         close(drv->event_sock);
1393         close(drv->ioctl_sock);
1394         os_free(drv->assoc_req_ies);
1395         os_free(drv->assoc_resp_ies);
1396
1397         genl_family_put(drv->nl80211);
1398         nl_cache_free(drv->nl_cache);
1399         nl_handle_destroy(drv->nl_handle);
1400         nl_cb_put(drv->nl_cb);
1401
1402         os_free(drv);
1403 }
1404
1405
1406 /**
1407  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1408  * @eloop_ctx: Unused
1409  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1410  *
1411  * This function can be used as registered timeout when starting a scan to
1412  * generate a scan completed event if the driver does not report this.
1413  */
1414 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1415 {
1416         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1417         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1418 }
1419
1420
1421 /**
1422  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1423  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1424  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1425  *      all SSIDs (either active scan with broadcast SSID or passive
1426  *      scan
1427  * @ssid_len: Length of the SSID
1428  * Returns: 0 on success, -1 on failure
1429  */
1430 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1431 {
1432         struct wpa_driver_nl80211_data *drv = priv;
1433         struct iwreq iwr;
1434         int ret = 0, timeout;
1435         struct iw_scan_req req;
1436
1437         if (ssid_len > IW_ESSID_MAX_SIZE) {
1438                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1439                            __FUNCTION__, (unsigned long) ssid_len);
1440                 return -1;
1441         }
1442
1443         os_memset(&iwr, 0, sizeof(iwr));
1444         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1445
1446         if (ssid && ssid_len) {
1447                 os_memset(&req, 0, sizeof(req));
1448                 req.essid_len = ssid_len;
1449                 req.bssid.sa_family = ARPHRD_ETHER;
1450                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1451                 os_memcpy(req.essid, ssid, ssid_len);
1452                 iwr.u.data.pointer = (caddr_t) &req;
1453                 iwr.u.data.length = sizeof(req);
1454                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1455         }
1456
1457         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1458                 perror("ioctl[SIOCSIWSCAN]");
1459                 ret = -1;
1460         }
1461
1462         /* Not all drivers generate "scan completed" wireless event, so try to
1463          * read results after a timeout. */
1464         timeout = 5;
1465         if (drv->scan_complete_events) {
1466                 /*
1467                  * The driver seems to deliver SIOCGIWSCAN events to notify
1468                  * when scan is complete, so use longer timeout to avoid race
1469                  * conditions with scanning and following association request.
1470                  */
1471                 timeout = 30;
1472         }
1473         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1474                    "seconds", ret, timeout);
1475         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1476         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout, drv,
1477                                drv->ctx);
1478
1479         return ret;
1480 }
1481
1482
1483 static u8 * wpa_driver_nl80211_giwscan(struct wpa_driver_nl80211_data *drv,
1484                                     size_t *len)
1485 {
1486         struct iwreq iwr;
1487         u8 *res_buf;
1488         size_t res_buf_len;
1489
1490         res_buf_len = IW_SCAN_MAX_DATA;
1491         for (;;) {
1492                 res_buf = os_malloc(res_buf_len);
1493                 if (res_buf == NULL)
1494                         return NULL;
1495                 os_memset(&iwr, 0, sizeof(iwr));
1496                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1497                 iwr.u.data.pointer = res_buf;
1498                 iwr.u.data.length = res_buf_len;
1499
1500                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1501                         break;
1502
1503                 if (errno == E2BIG && res_buf_len < 100000) {
1504                         os_free(res_buf);
1505                         res_buf = NULL;
1506                         res_buf_len *= 2;
1507                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1508                                    "trying larger buffer (%lu bytes)",
1509                                    (unsigned long) res_buf_len);
1510                 } else {
1511                         perror("ioctl[SIOCGIWSCAN]");
1512                         os_free(res_buf);
1513                         return NULL;
1514                 }
1515         }
1516
1517         if (iwr.u.data.length > res_buf_len) {
1518                 os_free(res_buf);
1519                 return NULL;
1520         }
1521         *len = iwr.u.data.length;
1522
1523         return res_buf;
1524 }
1525
1526
1527 /*
1528  * Data structure for collecting WEXT scan results. This is needed to allow
1529  * the various methods of reporting IEs to be combined into a single IE buffer.
1530  */
1531 struct wext_scan_data {
1532         struct wpa_scan_res res;
1533         u8 *ie;
1534         size_t ie_len;
1535         u8 ssid[32];
1536         size_t ssid_len;
1537         int maxrate;
1538 };
1539
1540
1541 static void wext_get_scan_mode(struct iw_event *iwe,
1542                                struct wext_scan_data *res)
1543 {
1544         if (iwe->u.mode == IW_MODE_ADHOC)
1545                 res->res.caps |= IEEE80211_CAP_IBSS;
1546         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1547                 res->res.caps |= IEEE80211_CAP_ESS;
1548 }
1549
1550
1551 static void wext_get_scan_ssid(struct iw_event *iwe,
1552                                struct wext_scan_data *res, char *custom,
1553                                char *end)
1554 {
1555         int ssid_len = iwe->u.essid.length;
1556         if (custom + ssid_len > end)
1557                 return;
1558         if (iwe->u.essid.flags &&
1559             ssid_len > 0 &&
1560             ssid_len <= IW_ESSID_MAX_SIZE) {
1561                 os_memcpy(res->ssid, custom, ssid_len);
1562                 res->ssid_len = ssid_len;
1563         }
1564 }
1565
1566
1567 static void wext_get_scan_freq(struct iw_event *iwe,
1568                                struct wext_scan_data *res)
1569 {
1570         int divi = 1000000, i;
1571
1572         if (iwe->u.freq.e == 0) {
1573                 /*
1574                  * Some drivers do not report frequency, but a channel.
1575                  * Try to map this to frequency by assuming they are using
1576                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1577                  * frequency if the driver sends both frequency and channel,
1578                  * since the driver may be sending an A-band channel that we
1579                  * don't handle here.
1580                  */
1581
1582                 if (res->res.freq)
1583                         return;
1584
1585                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1586                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1587                         return;
1588                 } else if (iwe->u.freq.m == 14) {
1589                         res->res.freq = 2484;
1590                         return;
1591                 }
1592         }
1593
1594         if (iwe->u.freq.e > 6) {
1595                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1596                            MACSTR " m=%d e=%d)",
1597                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1598                            iwe->u.freq.e);
1599                 return;
1600         }
1601
1602         for (i = 0; i < iwe->u.freq.e; i++)
1603                 divi /= 10;
1604         res->res.freq = iwe->u.freq.m / divi;
1605 }
1606
1607
1608 static void wext_get_scan_qual(struct iw_event *iwe,
1609                                struct wext_scan_data *res)
1610 {
1611         res->res.qual = iwe->u.qual.qual;
1612         res->res.noise = iwe->u.qual.noise;
1613         res->res.level = iwe->u.qual.level;
1614 }
1615
1616
1617 static void wext_get_scan_encode(struct iw_event *iwe,
1618                                  struct wext_scan_data *res)
1619 {
1620         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1621                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1622 }
1623
1624
1625 static void wext_get_scan_rate(struct iw_event *iwe,
1626                                struct wext_scan_data *res, char *pos,
1627                                char *end)
1628 {
1629         int maxrate;
1630         char *custom = pos + IW_EV_LCP_LEN;
1631         struct iw_param p;
1632         size_t clen;
1633
1634         clen = iwe->len;
1635         if (custom + clen > end)
1636                 return;
1637         maxrate = 0;
1638         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1639                 /* Note: may be misaligned, make a local, aligned copy */
1640                 os_memcpy(&p, custom, sizeof(struct iw_param));
1641                 if (p.value > maxrate)
1642                         maxrate = p.value;
1643                 clen -= sizeof(struct iw_param);
1644                 custom += sizeof(struct iw_param);
1645         }
1646
1647         /* Convert the maxrate from WE-style (b/s units) to
1648          * 802.11 rates (500000 b/s units).
1649          */
1650         res->maxrate = maxrate / 500000;
1651 }
1652
1653
1654 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1655                                     struct wext_scan_data *res, char *custom,
1656                                     char *end)
1657 {
1658         char *genie, *gpos, *gend;
1659         u8 *tmp;
1660
1661         if (iwe->u.data.length == 0)
1662                 return;
1663
1664         gpos = genie = custom;
1665         gend = genie + iwe->u.data.length;
1666         if (gend > end) {
1667                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1668                 return;
1669         }
1670
1671         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1672         if (tmp == NULL)
1673                 return;
1674         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1675         res->ie = tmp;
1676         res->ie_len += gend - gpos;
1677 }
1678
1679
1680 static void wext_get_scan_custom(struct iw_event *iwe,
1681                                  struct wext_scan_data *res, char *custom,
1682                                  char *end)
1683 {
1684         size_t clen;
1685         u8 *tmp;
1686
1687         clen = iwe->u.data.length;
1688         if (custom + clen > end)
1689                 return;
1690
1691         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1692                 char *spos;
1693                 int bytes;
1694                 spos = custom + 7;
1695                 bytes = custom + clen - spos;
1696                 if (bytes & 1 || bytes == 0)
1697                         return;
1698                 bytes /= 2;
1699                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1700                 if (tmp == NULL)
1701                         return;
1702                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1703                 res->ie = tmp;
1704                 res->ie_len += bytes;
1705         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1706                 char *spos;
1707                 int bytes;
1708                 spos = custom + 7;
1709                 bytes = custom + clen - spos;
1710                 if (bytes & 1 || bytes == 0)
1711                         return;
1712                 bytes /= 2;
1713                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1714                 if (tmp == NULL)
1715                         return;
1716                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1717                 res->ie = tmp;
1718                 res->ie_len += bytes;
1719         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1720                 char *spos;
1721                 int bytes;
1722                 u8 bin[8];
1723                 spos = custom + 4;
1724                 bytes = custom + clen - spos;
1725                 if (bytes != 16) {
1726                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1727                         return;
1728                 }
1729                 bytes /= 2;
1730                 hexstr2bin(spos, bin, bytes);
1731                 res->res.tsf += WPA_GET_BE64(bin);
1732         }
1733 }
1734
1735
1736 static int wext_19_iw_point(struct wpa_driver_nl80211_data *drv, u16 cmd)
1737 {
1738         return drv->we_version_compiled > 18 &&
1739                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1740                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1741 }
1742
1743
1744 static void wpa_driver_nl80211_add_scan_entry(struct wpa_scan_results *res,
1745                                            struct wext_scan_data *data)
1746 {
1747         struct wpa_scan_res **tmp;
1748         struct wpa_scan_res *r;
1749         size_t extra_len;
1750         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1751
1752         /* Figure out whether we need to fake any IEs */
1753         pos = data->ie;
1754         end = pos + data->ie_len;
1755         while (pos && pos + 1 < end) {
1756                 if (pos + 2 + pos[1] > end)
1757                         break;
1758                 if (pos[0] == WLAN_EID_SSID)
1759                         ssid_ie = pos;
1760                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1761                         rate_ie = pos;
1762                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1763                         rate_ie = pos;
1764                 pos += 2 + pos[1];
1765         }
1766
1767         extra_len = 0;
1768         if (ssid_ie == NULL)
1769                 extra_len += 2 + data->ssid_len;
1770         if (rate_ie == NULL && data->maxrate)
1771                 extra_len += 3;
1772
1773         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1774         if (r == NULL)
1775                 return;
1776         os_memcpy(r, &data->res, sizeof(*r));
1777         r->ie_len = extra_len + data->ie_len;
1778         pos = (u8 *) (r + 1);
1779         if (ssid_ie == NULL) {
1780                 /*
1781                  * Generate a fake SSID IE since the driver did not report
1782                  * a full IE list.
1783                  */
1784                 *pos++ = WLAN_EID_SSID;
1785                 *pos++ = data->ssid_len;
1786                 os_memcpy(pos, data->ssid, data->ssid_len);
1787                 pos += data->ssid_len;
1788         }
1789         if (rate_ie == NULL && data->maxrate) {
1790                 /*
1791                  * Generate a fake Supported Rates IE since the driver did not
1792                  * report a full IE list.
1793                  */
1794                 *pos++ = WLAN_EID_SUPP_RATES;
1795                 *pos++ = 1;
1796                 *pos++ = data->maxrate;
1797         }
1798         if (data->ie)
1799                 os_memcpy(pos, data->ie, data->ie_len);
1800
1801         tmp = os_realloc(res->res,
1802                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1803         if (tmp == NULL) {
1804                 os_free(r);
1805                 return;
1806         }
1807         tmp[res->num++] = r;
1808         res->res = tmp;
1809 }
1810
1811
1812 /**
1813  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1814  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1815  * Returns: Scan results on success, -1 on failure
1816  */
1817 struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv)
1818 {
1819         struct wpa_driver_nl80211_data *drv = priv;
1820         size_t ap_num = 0, len;
1821         int first;
1822         u8 *res_buf;
1823         struct iw_event iwe_buf, *iwe = &iwe_buf;
1824         char *pos, *end, *custom;
1825         struct wpa_scan_results *res;
1826         struct wext_scan_data data;
1827
1828         res_buf = wpa_driver_nl80211_giwscan(drv, &len);
1829         if (res_buf == NULL)
1830                 return NULL;
1831
1832         ap_num = 0;
1833         first = 1;
1834
1835         res = os_zalloc(sizeof(*res));
1836         if (res == NULL) {
1837                 os_free(res_buf);
1838                 return NULL;
1839         }
1840
1841         pos = (char *) res_buf;
1842         end = (char *) res_buf + len;
1843         os_memset(&data, 0, sizeof(data));
1844
1845         while (pos + IW_EV_LCP_LEN <= end) {
1846                 /* Event data may be unaligned, so make a local, aligned copy
1847                  * before processing. */
1848                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1849                 if (iwe->len <= IW_EV_LCP_LEN)
1850                         break;
1851
1852                 custom = pos + IW_EV_POINT_LEN;
1853                 if (wext_19_iw_point(drv, iwe->cmd)) {
1854                         /* WE-19 removed the pointer from struct iw_point */
1855                         char *dpos = (char *) &iwe_buf.u.data.length;
1856                         int dlen = dpos - (char *) &iwe_buf;
1857                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1858                                   sizeof(struct iw_event) - dlen);
1859                 } else {
1860                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1861                         custom += IW_EV_POINT_OFF;
1862                 }
1863
1864                 switch (iwe->cmd) {
1865                 case SIOCGIWAP:
1866                         if (!first)
1867                                 wpa_driver_nl80211_add_scan_entry(res, &data);
1868                         first = 0;
1869                         os_free(data.ie);
1870                         os_memset(&data, 0, sizeof(data));
1871                         os_memcpy(data.res.bssid,
1872                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1873                         break;
1874                 case SIOCGIWMODE:
1875                         wext_get_scan_mode(iwe, &data);
1876                         break;
1877                 case SIOCGIWESSID:
1878                         wext_get_scan_ssid(iwe, &data, custom, end);
1879                         break;
1880                 case SIOCGIWFREQ:
1881                         wext_get_scan_freq(iwe, &data);
1882                         break;
1883                 case IWEVQUAL:
1884                         wext_get_scan_qual(iwe, &data);
1885                         break;
1886                 case SIOCGIWENCODE:
1887                         wext_get_scan_encode(iwe, &data);
1888                         break;
1889                 case SIOCGIWRATE:
1890                         wext_get_scan_rate(iwe, &data, pos, end);
1891                         break;
1892                 case IWEVGENIE:
1893                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1894                         break;
1895                 case IWEVCUSTOM:
1896                         wext_get_scan_custom(iwe, &data, custom, end);
1897                         break;
1898                 }
1899
1900                 pos += iwe->len;
1901         }
1902         os_free(res_buf);
1903         res_buf = NULL;
1904         if (!first)
1905                 wpa_driver_nl80211_add_scan_entry(res, &data);
1906         os_free(data.ie);
1907
1908         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1909                    (unsigned long) len, (unsigned long) res->num);
1910
1911         return res;
1912 }
1913
1914
1915 static int wpa_driver_nl80211_get_range(void *priv)
1916 {
1917         struct wpa_driver_nl80211_data *drv = priv;
1918         struct iw_range *range;
1919         struct iwreq iwr;
1920         int minlen;
1921         size_t buflen;
1922
1923         /*
1924          * Use larger buffer than struct iw_range in order to allow the
1925          * structure to grow in the future.
1926          */
1927         buflen = sizeof(struct iw_range) + 500;
1928         range = os_zalloc(buflen);
1929         if (range == NULL)
1930                 return -1;
1931
1932         os_memset(&iwr, 0, sizeof(iwr));
1933         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1934         iwr.u.data.pointer = (caddr_t) range;
1935         iwr.u.data.length = buflen;
1936
1937         minlen = ((char *) &range->enc_capa) - (char *) range +
1938                 sizeof(range->enc_capa);
1939
1940         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1941                 perror("ioctl[SIOCGIWRANGE]");
1942                 os_free(range);
1943                 return -1;
1944         } else if (iwr.u.data.length >= minlen &&
1945                    range->we_version_compiled >= 18) {
1946                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1947                            "WE(source)=%d enc_capa=0x%x",
1948                            range->we_version_compiled,
1949                            range->we_version_source,
1950                            range->enc_capa);
1951                 drv->has_capability = 1;
1952                 drv->we_version_compiled = range->we_version_compiled;
1953                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1954                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1955                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1956                 }
1957                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1958                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1959                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1960                 }
1961                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1962                         WPA_DRIVER_CAPA_ENC_WEP104;
1963                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1964                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1965                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1966                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1967                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1968                            drv->capa.key_mgmt, drv->capa.enc);
1969         } else {
1970                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1971                            "assuming WPA is not supported");
1972         }
1973
1974         os_free(range);
1975         return 0;
1976 }
1977
1978
1979 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1980 {
1981         struct wpa_driver_nl80211_data *drv = priv;
1982         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1983
1984         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1985                                               enabled);
1986 }
1987
1988
1989 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1990                                       const u8 *addr, int key_idx,
1991                                       int set_tx, const u8 *seq,
1992                                       size_t seq_len,
1993                                       const u8 *key, size_t key_len)
1994 {
1995         struct wpa_driver_nl80211_data *drv = priv;
1996         int err;
1997         struct nl_msg *msg;
1998
1999         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
2000                    "seq_len=%lu key_len=%lu",
2001                    __func__, alg, addr, key_idx, set_tx,
2002                    (unsigned long) seq_len, (unsigned long) key_len);
2003
2004         msg = nlmsg_alloc();
2005         if (msg == NULL)
2006                 return -1;
2007
2008         if (alg == WPA_ALG_NONE) {
2009                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2010                             NL80211_CMD_DEL_KEY, 0);
2011         } else {
2012                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2013                             NL80211_CMD_NEW_KEY, 0);
2014                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2015                 switch (alg) {
2016                 case WPA_ALG_WEP:
2017                         if (key_len == 5)
2018                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2019                                             0x000FAC01);
2020                         else
2021                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2022                                             0x000FAC05);
2023                         break;
2024                 case WPA_ALG_TKIP:
2025                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
2026                         break;
2027                 case WPA_ALG_CCMP:
2028                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
2029                         break;
2030                 default:
2031                         nlmsg_free(msg);
2032                         return -1;
2033                 }
2034         }
2035
2036         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2037         {
2038                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2039                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2040         }
2041         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2042         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2043
2044         err = send_and_recv_msgs(drv, msg, NULL, NULL);
2045         if (err) {
2046                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
2047                 return -1;
2048         }
2049
2050         if (set_tx && alg != WPA_ALG_NONE) {
2051                 msg = nlmsg_alloc();
2052                 if (msg == NULL)
2053                         return -1;
2054
2055                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2056                             0, NL80211_CMD_SET_KEY, 0);
2057                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2058                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2059                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2060
2061                 err = send_and_recv_msgs(drv, msg, NULL, NULL);
2062                 if (err) {
2063                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
2064                                    "failed; err=%d", err);
2065                         return -1;
2066                 }
2067         }
2068
2069         return 0;
2070
2071 nla_put_failure:
2072         return -ENOBUFS;
2073 }
2074
2075
2076 static int wpa_driver_nl80211_set_countermeasures(void *priv,
2077                                                int enabled)
2078 {
2079         struct wpa_driver_nl80211_data *drv = priv;
2080         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2081         return wpa_driver_nl80211_set_auth_param(drv,
2082                                               IW_AUTH_TKIP_COUNTERMEASURES,
2083                                               enabled);
2084 }
2085
2086
2087 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
2088                                                 int enabled)
2089 {
2090         struct wpa_driver_nl80211_data *drv = priv;
2091         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2092         drv->use_crypt = enabled;
2093         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2094                                               enabled);
2095 }
2096
2097
2098 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2099                                 const u8 *addr, int cmd, int reason_code)
2100 {
2101         struct iwreq iwr;
2102         struct iw_mlme mlme;
2103         int ret = 0;
2104
2105         os_memset(&iwr, 0, sizeof(iwr));
2106         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2107         os_memset(&mlme, 0, sizeof(mlme));
2108         mlme.cmd = cmd;
2109         mlme.reason_code = reason_code;
2110         mlme.addr.sa_family = ARPHRD_ETHER;
2111         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2112         iwr.u.data.pointer = (caddr_t) &mlme;
2113         iwr.u.data.length = sizeof(mlme);
2114
2115         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2116                 perror("ioctl[SIOCSIWMLME]");
2117                 ret = -1;
2118         }
2119
2120         return ret;
2121 }
2122
2123
2124 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2125                                           int reason_code)
2126 {
2127         struct wpa_driver_nl80211_data *drv = priv;
2128         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2129         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2130 }
2131
2132
2133 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2134                                         int reason_code)
2135 {
2136         struct wpa_driver_nl80211_data *drv = priv;
2137         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2138         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2139                                     reason_code);
2140 }
2141
2142
2143 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2144                                       size_t ie_len)
2145 {
2146         struct wpa_driver_nl80211_data *drv = priv;
2147         struct iwreq iwr;
2148         int ret = 0;
2149
2150         os_memset(&iwr, 0, sizeof(iwr));
2151         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2152         iwr.u.data.pointer = (caddr_t) ie;
2153         iwr.u.data.length = ie_len;
2154
2155         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2156                 perror("ioctl[SIOCSIWGENIE]");
2157                 ret = -1;
2158         }
2159
2160         return ret;
2161 }
2162
2163
2164 static int wpa_driver_nl80211_cipher2wext(int cipher)
2165 {
2166         switch (cipher) {
2167         case CIPHER_NONE:
2168                 return IW_AUTH_CIPHER_NONE;
2169         case CIPHER_WEP40:
2170                 return IW_AUTH_CIPHER_WEP40;
2171         case CIPHER_TKIP:
2172                 return IW_AUTH_CIPHER_TKIP;
2173         case CIPHER_CCMP:
2174                 return IW_AUTH_CIPHER_CCMP;
2175         case CIPHER_WEP104:
2176                 return IW_AUTH_CIPHER_WEP104;
2177         default:
2178                 return 0;
2179         }
2180 }
2181
2182
2183 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2184 {
2185         switch (keymgmt) {
2186         case KEY_MGMT_802_1X:
2187         case KEY_MGMT_802_1X_NO_WPA:
2188                 return IW_AUTH_KEY_MGMT_802_1X;
2189         case KEY_MGMT_PSK:
2190                 return IW_AUTH_KEY_MGMT_PSK;
2191         default:
2192                 return 0;
2193         }
2194 }
2195
2196
2197 static int
2198 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2199                                   struct wpa_driver_associate_params *params)
2200 {
2201         struct iwreq iwr;
2202         int ret = 0;
2203
2204         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2205                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2206
2207         os_memset(&iwr, 0, sizeof(iwr));
2208         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2209         /* Just changing mode, not actual keys */
2210         iwr.u.encoding.flags = 0;
2211         iwr.u.encoding.pointer = (caddr_t) NULL;
2212         iwr.u.encoding.length = 0;
2213
2214         /*
2215          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2216          * different things. Here they are used to indicate Open System vs.
2217          * Shared Key authentication algorithm. However, some drivers may use
2218          * them to select between open/restricted WEP encrypted (open = allow
2219          * both unencrypted and encrypted frames; restricted = only allow
2220          * encrypted frames).
2221          */
2222
2223         if (!drv->use_crypt) {
2224                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2225         } else {
2226                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2227                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2228                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2229                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2230         }
2231
2232         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2233                 perror("ioctl[SIOCSIWENCODE]");
2234                 ret = -1;
2235         }
2236
2237         return ret;
2238 }
2239
2240
2241 static int wpa_driver_nl80211_associate(
2242         void *priv, struct wpa_driver_associate_params *params)
2243 {
2244         struct wpa_driver_nl80211_data *drv = priv;
2245         int ret = 0;
2246         int allow_unencrypted_eapol;
2247         int value;
2248
2249         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2250
2251         /*
2252          * If the driver did not support SIOCSIWAUTH, fallback to
2253          * SIOCSIWENCODE here.
2254          */
2255         if (drv->auth_alg_fallback &&
2256             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2257                 ret = -1;
2258
2259         if (!params->bssid &&
2260             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2261                 ret = -1;
2262
2263         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2264          * from configuration, not from here, where only the selected suite is
2265          * available */
2266         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2267             < 0)
2268                 ret = -1;
2269         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2270                 value = IW_AUTH_WPA_VERSION_DISABLED;
2271         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2272                 value = IW_AUTH_WPA_VERSION_WPA2;
2273         else
2274                 value = IW_AUTH_WPA_VERSION_WPA;
2275         if (wpa_driver_nl80211_set_auth_param(drv,
2276                                            IW_AUTH_WPA_VERSION, value) < 0)
2277                 ret = -1;
2278         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2279         if (wpa_driver_nl80211_set_auth_param(drv,
2280                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2281                 ret = -1;
2282         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2283         if (wpa_driver_nl80211_set_auth_param(drv,
2284                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2285                 ret = -1;
2286         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2287         if (wpa_driver_nl80211_set_auth_param(drv,
2288                                            IW_AUTH_KEY_MGMT, value) < 0)
2289                 ret = -1;
2290         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2291                 params->pairwise_suite != CIPHER_NONE ||
2292                 params->group_suite != CIPHER_NONE ||
2293                 params->wpa_ie_len;
2294         if (wpa_driver_nl80211_set_auth_param(drv,
2295                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2296                 ret = -1;
2297
2298         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2299          * not using WPA. IEEE 802.1X specifies that these frames are not
2300          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2301         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2302             params->key_mgmt_suite == KEY_MGMT_PSK)
2303                 allow_unencrypted_eapol = 0;
2304         else
2305                 allow_unencrypted_eapol = 1;
2306
2307         if (wpa_driver_nl80211_set_auth_param(drv,
2308                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2309                                            allow_unencrypted_eapol) < 0)
2310                 ret = -1;
2311         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2312                 ret = -1;
2313         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2314                 ret = -1;
2315         if (params->bssid &&
2316             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2317                 ret = -1;
2318
2319         return ret;
2320 }
2321
2322
2323 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2324 {
2325         struct wpa_driver_nl80211_data *drv = priv;
2326         int algs = 0, res;
2327
2328         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2329                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2330         if (auth_alg & AUTH_ALG_SHARED_KEY)
2331                 algs |= IW_AUTH_ALG_SHARED_KEY;
2332         if (auth_alg & AUTH_ALG_LEAP)
2333                 algs |= IW_AUTH_ALG_LEAP;
2334         if (algs == 0) {
2335                 /* at least one algorithm should be set */
2336                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2337         }
2338
2339         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2340                                              algs);
2341         drv->auth_alg_fallback = res == -2;
2342         return res;
2343 }
2344
2345
2346 /**
2347  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2348  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2349  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2350  * Returns: 0 on success, -1 on failure
2351  */
2352 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2353 {
2354         struct wpa_driver_nl80211_data *drv = priv;
2355         int ret = -1, flags;
2356         struct nl_msg *msg;
2357
2358         msg = nlmsg_alloc();
2359         if (!msg)
2360                 return -1;
2361
2362         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2363                     0, NL80211_CMD_SET_INTERFACE, 0);
2364         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2365         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2366                     mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2367
2368         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2369         if (!ret)
2370                 return 0;
2371         else
2372                 goto try_again;
2373
2374 nla_put_failure:
2375         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
2376         return -1;
2377
2378 try_again:
2379         /* mac80211 doesn't allow mode changes while the device is up, so
2380          * take the device down, try to set the mode again, and bring the
2381          * device back up.
2382          */
2383         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2384                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2385
2386                 /* Try to set the mode again while the interface is down */
2387                 msg = nlmsg_alloc();
2388                 if (!msg)
2389                         return -1;
2390
2391                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2392                             0, NL80211_CMD_SET_INTERFACE, 0);
2393                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2394                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2395                             mode ? NL80211_IFTYPE_ADHOC :
2396                             NL80211_IFTYPE_STATION);
2397                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2398                 if (ret) {
2399                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2400                                    "mode", drv->ifname);
2401                 }
2402
2403                 /* Ignore return value of get_ifflags to ensure that the device
2404                  * is always up like it was before this function was called.
2405                  */
2406                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2407                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2408         }
2409
2410         return ret;
2411 }
2412
2413
2414 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2415                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2416 {
2417         struct iwreq iwr;
2418         struct iw_pmksa pmksa;
2419         int ret = 0;
2420
2421         os_memset(&iwr, 0, sizeof(iwr));
2422         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2423         os_memset(&pmksa, 0, sizeof(pmksa));
2424         pmksa.cmd = cmd;
2425         pmksa.bssid.sa_family = ARPHRD_ETHER;
2426         if (bssid)
2427                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2428         if (pmkid)
2429                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2430         iwr.u.data.pointer = (caddr_t) &pmksa;
2431         iwr.u.data.length = sizeof(pmksa);
2432
2433         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2434                 if (errno != EOPNOTSUPP)
2435                         perror("ioctl[SIOCSIWPMKSA]");
2436                 ret = -1;
2437         }
2438
2439         return ret;
2440 }
2441
2442
2443 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2444                                      const u8 *pmkid)
2445 {
2446         struct wpa_driver_nl80211_data *drv = priv;
2447         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2448 }
2449
2450
2451 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2452                                         const u8 *pmkid)
2453 {
2454         struct wpa_driver_nl80211_data *drv = priv;
2455         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2456 }
2457
2458
2459 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2460 {
2461         struct wpa_driver_nl80211_data *drv = priv;
2462         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2463 }
2464
2465
2466 static int wpa_driver_nl80211_get_capa(void *priv,
2467                                        struct wpa_driver_capa *capa)
2468 {
2469         struct wpa_driver_nl80211_data *drv = priv;
2470         if (!drv->has_capability)
2471                 return -1;
2472         os_memcpy(capa, &drv->capa, sizeof(*capa));
2473         return 0;
2474 }
2475
2476
2477 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2478 {
2479         struct wpa_driver_nl80211_data *drv = priv;
2480
2481         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2482                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2483         drv->operstate = state;
2484         return wpa_driver_nl80211_send_oper_ifla(
2485                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2486 }
2487
2488
2489 #ifdef CONFIG_CLIENT_MLME
2490 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2491 {
2492         if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2493                 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2494                            "MLME");
2495                 return -1;
2496         }
2497         if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2498                 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2499                            "interface");
2500                 return -1;
2501         }
2502         return 0;
2503 }
2504 #endif /* CONFIG_CLIENT_MLME */
2505
2506
2507 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2508 {
2509 #ifdef CONFIG_CLIENT_MLME
2510         struct wpa_driver_nl80211_data *drv = priv;
2511
2512         if (param == NULL)
2513                 return 0;
2514
2515         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2516
2517         if (os_strstr(param, "use_mlme=1")) {
2518                 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2519                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2520
2521                 if (wpa_driver_nl80211_open_mlme(drv))
2522                         return -1;
2523         }
2524 #endif /* CONFIG_CLIENT_MLME */
2525
2526         return 0;
2527 }
2528
2529
2530 #ifdef CONFIG_CLIENT_MLME
2531
2532 struct phy_info_arg {
2533         u16 *num_modes;
2534         struct wpa_hw_modes *modes;
2535 };
2536
2537
2538 static int phy_info_handler(struct nl_msg *msg, void *arg)
2539 {
2540         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2541         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2542         struct phy_info_arg *phy_info = arg;
2543
2544         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2545
2546         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2547         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2548                 = {
2549                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2550                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2551                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2552                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2553                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2554         };
2555
2556         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2557         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2558                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2559                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2560                 { .type = NLA_FLAG },
2561         };
2562
2563         struct nlattr *nl_band;
2564         struct nlattr *nl_freq;
2565         struct nlattr *nl_rate;
2566         int rem_band, rem_freq, rem_rate;
2567         struct wpa_hw_modes *mode;
2568         int idx, mode_is_set;
2569
2570         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2571                   genlmsg_attrlen(gnlh, 0), NULL);
2572
2573         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2574                 return NL_SKIP;
2575
2576         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2577                             rem_band) {
2578                 mode = os_realloc(phy_info->modes,
2579                                   (*phy_info->num_modes + 1) * sizeof(*mode));
2580                 if (!mode)
2581                         return NL_SKIP;
2582                 phy_info->modes = mode;
2583
2584                 mode_is_set = 0;
2585
2586                 mode = &phy_info->modes[*(phy_info->num_modes)];
2587                 os_memset(mode, 0, sizeof(*mode));
2588                 *(phy_info->num_modes) += 1;
2589
2590                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2591                           nla_len(nl_band), NULL);
2592
2593                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2594                                     rem_freq) {
2595                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2596                                   nla_data(nl_freq), nla_len(nl_freq),
2597                                   freq_policy);
2598                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2599                                 continue;
2600                         mode->num_channels++;
2601                 }
2602
2603                 mode->channels = os_zalloc(mode->num_channels *
2604                                            sizeof(struct wpa_channel_data));
2605                 if (!mode->channels)
2606                         return NL_SKIP;
2607
2608                 idx = 0;
2609
2610                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2611                                     rem_freq) {
2612                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2613                                   nla_data(nl_freq), nla_len(nl_freq),
2614                                   freq_policy);
2615                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2616                                 continue;
2617
2618                         mode->channels[idx].freq = nla_get_u32(
2619                                 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2620                         mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2621                                 WPA_CHAN_W_ACTIVE_SCAN |
2622                                 WPA_CHAN_W_IBSS;
2623
2624                         if (!mode_is_set) {
2625                                 /* crude heuristic */
2626                                 if (mode->channels[idx].freq < 4000)
2627                                         mode->mode = WPA_MODE_IEEE80211B;
2628                                 else
2629                                         mode->mode = WPA_MODE_IEEE80211A;
2630                                 mode_is_set = 1;
2631                         }
2632
2633                         /* crude heuristic */
2634                         if (mode->channels[idx].freq < 4000) {
2635                                 if (mode->channels[idx].freq == 2848)
2636                                         mode->channels[idx].chan = 14;
2637                                 else
2638                                         mode->channels[idx].chan =
2639                                                 (mode->channels[idx].freq -
2640                                                  2407) / 5;
2641                         } else
2642                                 mode->channels[idx].chan =
2643                                         mode->channels[idx].freq / 5 - 1000;
2644
2645                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2646                                 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2647                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2648                                 mode->channels[idx].flag &=
2649                                         ~WPA_CHAN_W_ACTIVE_SCAN;
2650                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2651                                 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2652                         idx++;
2653                 }
2654
2655                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2656                                     rem_rate) {
2657                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2658                                   nla_data(nl_rate), nla_len(nl_rate),
2659                                   rate_policy);
2660                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2661                                 continue;
2662                         mode->num_rates++;
2663                 }
2664
2665                 mode->rates = os_zalloc(mode->num_rates *
2666                                         sizeof(struct wpa_rate_data));
2667                 if (!mode->rates)
2668                         return NL_SKIP;
2669
2670                 idx = 0;
2671
2672                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2673                                     rem_rate) {
2674                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2675                                   nla_data(nl_rate), nla_len(nl_rate),
2676                                   rate_policy);
2677                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2678                                 continue;
2679                         mode->rates[idx].rate = nla_get_u32(
2680                                 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2681
2682                         /* crude heuristic */
2683                         if (mode->mode == WPA_MODE_IEEE80211B &&
2684                             mode->rates[idx].rate > 200)
2685                                 mode->mode = WPA_MODE_IEEE80211G;
2686
2687                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2688                                 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2689
2690                         idx++;
2691                 }
2692         }
2693
2694         return NL_SKIP;
2695 }
2696
2697
2698 static struct wpa_hw_modes *
2699 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2700 {
2701         struct wpa_driver_nl80211_data *drv = priv;
2702         struct nl_msg *msg;
2703         struct phy_info_arg result = {
2704                 .num_modes = num_modes,
2705                 .modes = NULL,
2706         };
2707
2708         *num_modes = 0;
2709         *flags = 0;
2710
2711         msg = nlmsg_alloc();
2712         if (!msg)
2713                 return NULL;
2714
2715         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2716                     0, NL80211_CMD_GET_WIPHY, 0);
2717
2718         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2719
2720         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2721                 return result.modes;
2722 nla_put_failure:
2723         return NULL;
2724 }
2725
2726
2727 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2728                                           int chan, int freq)
2729 {
2730         return wpa_driver_nl80211_set_freq(priv, freq);
2731 }
2732
2733
2734 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2735                                         size_t data_len)
2736 {
2737         struct wpa_driver_nl80211_data *drv = priv;
2738         __u8 rtap_hdr[] = {
2739                 0x00, 0x00, /* radiotap version */
2740                 0x0e, 0x00, /* radiotap length */
2741                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2742                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
2743                 0x00,       /* padding */
2744                 0x00, 0x00, /* RX and TX flags to indicate that */
2745                 0x00, 0x00, /* this is the injected frame directly */
2746         };
2747         struct iovec iov[2] = {
2748                 {
2749                         .iov_base = &rtap_hdr,
2750                         .iov_len = sizeof(rtap_hdr),
2751                 },
2752                 {
2753                         .iov_base = (void *) data,
2754                         .iov_len = data_len,
2755                 }
2756         };
2757         struct msghdr msg = {
2758                 .msg_name = NULL,
2759                 .msg_namelen = 0,
2760                 .msg_iov = iov,
2761                 .msg_iovlen = 2,
2762                 .msg_control = NULL,
2763                 .msg_controllen = 0,
2764                 .msg_flags = 0,
2765         };
2766
2767         if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2768                 perror("send[MLME]");
2769                 return -1;
2770         }
2771
2772         return 0;
2773 }
2774
2775
2776 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2777                                            const u8 *supp_rates,
2778                                            size_t supp_rates_len)
2779 {
2780         struct wpa_driver_nl80211_data *drv = priv;
2781         struct nl_msg *msg;
2782         int ret = -1;
2783
2784         msg = nlmsg_alloc();
2785         if (!msg)
2786                 return -ENOMEM;
2787
2788         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2789                     0, NL80211_CMD_NEW_STATION, 0);
2790
2791         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2792         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2793         /* TODO: Get proper Association ID and listen interval */
2794         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2795         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2796                 supp_rates);
2797         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2798
2799         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2800         /* ignore EEXIST, this happens if a STA associates while associated */
2801         if (ret == -EEXIST || ret >= 0)
2802                 ret = 0;
2803
2804 nla_put_failure:
2805         return ret;
2806 }
2807
2808
2809 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2810 {
2811         struct wpa_driver_nl80211_data *drv = priv;
2812         struct nl_msg *msg;
2813         int ret = -1;
2814
2815         msg = nlmsg_alloc();
2816         if (!msg)
2817                 return -ENOMEM;
2818
2819         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2820                     0, NL80211_CMD_DEL_STATION, 0);
2821
2822         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2823         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2824
2825         ret = 0;
2826
2827         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2828         return ret;
2829
2830 nla_put_failure:
2831         return -ENOBUFS;
2832 }
2833
2834 #endif /* CONFIG_CLIENT_MLME */
2835
2836
2837 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2838         .name = "nl80211",
2839         .desc = "Linux nl80211/cfg80211",
2840         .get_bssid = wpa_driver_nl80211_get_bssid,
2841         .get_ssid = wpa_driver_nl80211_get_ssid,
2842         .set_wpa = wpa_driver_nl80211_set_wpa,
2843         .set_key = wpa_driver_nl80211_set_key,
2844         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2845         .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2846         .scan = wpa_driver_nl80211_scan,
2847         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2848         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2849         .disassociate = wpa_driver_nl80211_disassociate,
2850         .set_mode = wpa_driver_nl80211_set_mode,
2851         .associate = wpa_driver_nl80211_associate,
2852         .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2853         .init = wpa_driver_nl80211_init,
2854         .deinit = wpa_driver_nl80211_deinit,
2855         .set_param = wpa_driver_nl80211_set_param,
2856         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2857         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2858         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2859         .get_capa = wpa_driver_nl80211_get_capa,
2860         .set_operstate = wpa_driver_nl80211_set_operstate,
2861 #ifdef CONFIG_CLIENT_MLME
2862         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2863         .set_channel = wpa_driver_nl80211_set_channel,
2864         .set_ssid = wpa_driver_nl80211_set_ssid,
2865         .set_bssid = wpa_driver_nl80211_set_bssid,
2866         .send_mlme = wpa_driver_nl80211_send_mlme,
2867         .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2868         .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2869 #endif /* CONFIG_CLIENT_MLME */
2870 };