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

   1 /*
   2  * WPA Supplicant - driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <net/if_arp.h>
  18 #include <netlink/genl/genl.h>
  19 #include <netlink/genl/family.h>
  20 #include <netlink/genl/ctrl.h>
  21 #include <linux/nl80211.h>
  22
  23 #include "wireless_copy.h"
  24 #include "common.h"
  25 #include "driver.h"
  26 #include "eloop.h"
  27 #include "ieee802_11_defs.h"
  28
  29 #ifndef IFF_LOWER_UP
  30 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  31 #endif
  32 #ifndef IFF_DORMANT
  33 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  34 #endif
  35
  36 #ifndef IF_OPER_DORMANT
  37 #define IF_OPER_DORMANT 5
  38 #endif
  39 #ifndef IF_OPER_UP
  40 #define IF_OPER_UP 6
  41 #endif
  42
  43
  44 struct wpa_driver_nl80211_data {
  45         void *ctx;
  46         int event_sock;
  47         int ioctl_sock;
  48         char ifname[IFNAMSIZ + 1];
  49         int ifindex;
  50         int if_removed;
  51         u8 *assoc_req_ies;
  52         size_t assoc_req_ies_len;
  53         u8 *assoc_resp_ies;
  54         size_t assoc_resp_ies_len;
  55         struct wpa_driver_capa capa;
  56         int has_capability;
  57         int we_version_compiled;
  58
  59         /* for set_auth_alg fallback */
  60         int use_crypt;
  61         int auth_alg_fallback;
  62
  63         int operstate;
  64
  65         char mlmedev[IFNAMSIZ + 1];
  66
  67         int scan_complete_events;
  68
  69         struct nl_handle *nl_handle;
  70         struct nl_cache *nl_cache;
  71         struct nl_cb *nl_cb;
  72         struct genl_family *nl80211;
  73 };
  74
  75
  76 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
  77                                             void *timeout_ctx);
  78 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
  79 static int wpa_driver_nl80211_flush_pmkid(void *priv);
  80 static int wpa_driver_nl80211_get_range(void *priv);
  81 static void
  82 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
  83
  84
  85 static int wpa_driver_nl80211_send_oper_ifla(
  86         struct wpa_driver_nl80211_data *drv,
  87         int linkmode, int operstate)
  88 {
  89         struct {
  90                 struct nlmsghdr hdr;
  91                 struct ifinfomsg ifinfo;
  92                 char opts[16];
  93         } req;
  94         struct rtattr *rta;
  95         static int nl_seq;
  96         ssize_t ret;
  97
  98         os_memset(&req, 0, sizeof(req));
  99
 100         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 101         req.hdr.nlmsg_type = RTM_SETLINK;
 102         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 103         req.hdr.nlmsg_seq = ++nl_seq;
 104         req.hdr.nlmsg_pid = 0;
 105
 106         req.ifinfo.ifi_family = AF_UNSPEC;
 107         req.ifinfo.ifi_type = 0;
 108         req.ifinfo.ifi_index = drv->ifindex;
 109         req.ifinfo.ifi_flags = 0;
 110         req.ifinfo.ifi_change = 0;
 111
 112         if (linkmode != -1) {
 113                 rta = (struct rtattr *)
 114                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 115                 rta->rta_type = IFLA_LINKMODE;
 116                 rta->rta_len = RTA_LENGTH(sizeof(char));
 117                 *((char *) RTA_DATA(rta)) = linkmode;
 118                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 119                         RTA_LENGTH(sizeof(char));
 120         }
 121         if (operstate != -1) {
 122                 rta = (struct rtattr *)
 123                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 124                 rta->rta_type = IFLA_OPERSTATE;
 125                 rta->rta_len = RTA_LENGTH(sizeof(char));
 126                 *((char *) RTA_DATA(rta)) = operstate;
 127                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 128                         RTA_LENGTH(sizeof(char));
 129         }
 130
 131         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 132                    linkmode, operstate);
 133
 134         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 135         if (ret < 0) {
 136                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 137                            "%s (assume operstate is not supported)",
 138                            strerror(errno));
 139         }
 140
 141         return ret < 0 ? -1 : 0;
 142 }
 143
 144
 145 static int wpa_driver_nl80211_set_auth_param(
 146         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 147 {
 148         struct iwreq iwr;
 149         int ret = 0;
 150
 151         os_memset(&iwr, 0, sizeof(iwr));
 152         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 153         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 154         iwr.u.param.value = value;
 155
 156         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 157                 if (errno != EOPNOTSUPP) {
 158                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 159                                    "value 0x%x) failed: %s)",
 160                                    idx, value, strerror(errno));
 161                 }
 162                 ret = errno == EOPNOTSUPP ? -2 : -1;
 163         }
 164
 165         return ret;
 166 }
 167
 168
 169 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 170 {
 171         struct wpa_driver_nl80211_data *drv = priv;
 172         struct iwreq iwr;
 173         int ret = 0;
 174
 175         os_memset(&iwr, 0, sizeof(iwr));
 176         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 177
 178         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 179                 perror("ioctl[SIOCGIWAP]");
 180                 ret = -1;
 181         }
 182         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 183
 184         return ret;
 185 }
 186
 187
 188 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 189 {
 190         struct wpa_driver_nl80211_data *drv = priv;
 191         struct iwreq iwr;
 192         int ret = 0;
 193
 194         os_memset(&iwr, 0, sizeof(iwr));
 195         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 196         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 197         if (bssid)
 198                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 199         else
 200                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 201
 202         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 203                 perror("ioctl[SIOCSIWAP]");
 204                 ret = -1;
 205         }
 206
 207         return ret;
 208 }
 209
 210
 211 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 212 {
 213         struct wpa_driver_nl80211_data *drv = priv;
 214         struct iwreq iwr;
 215         int ret = 0;
 216
 217         os_memset(&iwr, 0, sizeof(iwr));
 218         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 219         iwr.u.essid.pointer = (caddr_t) ssid;
 220         iwr.u.essid.length = 32;
 221
 222         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 223                 perror("ioctl[SIOCGIWESSID]");
 224                 ret = -1;
 225         } else {
 226                 ret = iwr.u.essid.length;
 227                 if (ret > 32)
 228                         ret = 32;
 229                 /* Some drivers include nul termination in the SSID, so let's
 230                  * remove it here before further processing. WE-21 changes this
 231                  * to explicitly require the length _not_ to include nul
 232                  * termination. */
 233                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 234                     drv->we_version_compiled < 21)
 235                         ret--;
 236         }
 237
 238         return ret;
 239 }
 240
 241
 242 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 243                                        size_t ssid_len)
 244 {
 245         struct wpa_driver_nl80211_data *drv = priv;
 246         struct iwreq iwr;
 247         int ret = 0;
 248         char buf[33];
 249
 250         if (ssid_len > 32)
 251                 return -1;
 252
 253         os_memset(&iwr, 0, sizeof(iwr));
 254         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 255         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 256         iwr.u.essid.flags = (ssid_len != 0);
 257         os_memset(buf, 0, sizeof(buf));
 258         os_memcpy(buf, ssid, ssid_len);
 259         iwr.u.essid.pointer = (caddr_t) buf;
 260         if (drv->we_version_compiled < 21) {
 261                 /* For historic reasons, set SSID length to include one extra
 262                  * character, C string nul termination, even though SSID is
 263                  * really an octet string that should not be presented as a C
 264                  * string. Some Linux drivers decrement the length by one and
 265                  * can thus end up missing the last octet of the SSID if the
 266                  * length is not incremented here. WE-21 changes this to
 267                  * explicitly require the length _not_ to include nul
 268                  * termination. */
 269                 if (ssid_len)
 270                         ssid_len++;
 271         }
 272         iwr.u.essid.length = ssid_len;
 273
 274         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 275                 perror("ioctl[SIOCSIWESSID]");
 276                 ret = -1;
 277         }
 278
 279         return ret;
 280 }
 281
 282
 283 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 284 {
 285         struct wpa_driver_nl80211_data *drv = priv;
 286         struct iwreq iwr;
 287         int ret = 0;
 288
 289         os_memset(&iwr, 0, sizeof(iwr));
 290         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 291         iwr.u.freq.m = freq * 100000;
 292         iwr.u.freq.e = 1;
 293
 294         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 295                 perror("ioctl[SIOCSIWFREQ]");
 296                 ret = -1;
 297         }
 298
 299         return ret;
 300 }
 301
 302
 303 static void
 304 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 305 {
 306         union wpa_event_data data;
 307
 308         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 309                    custom);
 310
 311         os_memset(&data, 0, sizeof(data));
 312         /* Host AP driver */
 313         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 314                 data.michael_mic_failure.unicast =
 315                         os_strstr(custom, " unicast ") != NULL;
 316                 /* TODO: parse parameters(?) */
 317                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 318         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 319                 char *spos;
 320                 int bytes;
 321
 322                 spos = custom + 17;
 323
 324                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 325                 if (!bytes || (bytes & 1))
 326                         return;
 327                 bytes /= 2;
 328
 329                 data.assoc_info.req_ies = os_malloc(bytes);
 330                 if (data.assoc_info.req_ies == NULL)
 331                         return;
 332
 333                 data.assoc_info.req_ies_len = bytes;
 334                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 335
 336                 spos += bytes * 2;
 337
 338                 data.assoc_info.resp_ies = NULL;
 339                 data.assoc_info.resp_ies_len = 0;
 340
 341                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 342                         spos += 9;
 343
 344                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 345                         if (!bytes || (bytes & 1))
 346                                 goto done;
 347                         bytes /= 2;
 348
 349                         data.assoc_info.resp_ies = os_malloc(bytes);
 350                         if (data.assoc_info.resp_ies == NULL)
 351                                 goto done;
 352
 353                         data.assoc_info.resp_ies_len = bytes;
 354                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 355                 }
 356
 357                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 358
 359         done:
 360                 os_free(data.assoc_info.resp_ies);
 361                 os_free(data.assoc_info.req_ies);
 362 #ifdef CONFIG_PEERKEY
 363         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 364                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 365                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 366                                    "STKSTART.request '%s'", custom + 17);
 367                         return;
 368                 }
 369                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 370 #endif /* CONFIG_PEERKEY */
 371         }
 372 }
 373
 374
 375 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 376         void *ctx, const char *ev, size_t len)
 377 {
 378         const struct iw_michaelmicfailure *mic;
 379         union wpa_event_data data;
 380
 381         if (len < sizeof(*mic))
 382                 return -1;
 383
 384         mic = (const struct iw_michaelmicfailure *) ev;
 385
 386         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 387                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 388                    MAC2STR(mic->src_addr.sa_data));
 389
 390         os_memset(&data, 0, sizeof(data));
 391         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 392         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 393
 394         return 0;
 395 }
 396
 397
 398 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 399         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 400 {
 401         const struct iw_pmkid_cand *cand;
 402         union wpa_event_data data;
 403         const u8 *addr;
 404
 405         if (len < sizeof(*cand))
 406                 return -1;
 407
 408         cand = (const struct iw_pmkid_cand *) ev;
 409         addr = (const u8 *) cand->bssid.sa_data;
 410
 411         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 412                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 413                    cand->index, MAC2STR(addr));
 414
 415         os_memset(&data, 0, sizeof(data));
 416         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 417         data.pmkid_candidate.index = cand->index;
 418         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 419         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 420
 421         return 0;
 422 }
 423
 424
 425 static int wpa_driver_nl80211_event_wireless_assocreqie(
 426         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 427 {
 428         if (len < 0)
 429                 return -1;
 430
 431         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 432                     len);
 433         os_free(drv->assoc_req_ies);
 434         drv->assoc_req_ies = os_malloc(len);
 435         if (drv->assoc_req_ies == NULL) {
 436                 drv->assoc_req_ies_len = 0;
 437                 return -1;
 438         }
 439         os_memcpy(drv->assoc_req_ies, ev, len);
 440         drv->assoc_req_ies_len = len;
 441
 442         return 0;
 443 }
 444
 445
 446 static int wpa_driver_nl80211_event_wireless_assocrespie(
 447         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 448 {
 449         if (len < 0)
 450                 return -1;
 451
 452         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 453                     len);
 454         os_free(drv->assoc_resp_ies);
 455         drv->assoc_resp_ies = os_malloc(len);
 456         if (drv->assoc_resp_ies == NULL) {
 457                 drv->assoc_resp_ies_len = 0;
 458                 return -1;
 459         }
 460         os_memcpy(drv->assoc_resp_ies, ev, len);
 461         drv->assoc_resp_ies_len = len;
 462
 463         return 0;
 464 }
 465
 466
 467 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 468 {
 469         union wpa_event_data data;
 470
 471         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 472                 return;
 473
 474         os_memset(&data, 0, sizeof(data));
 475         if (drv->assoc_req_ies) {
 476                 data.assoc_info.req_ies = drv->assoc_req_ies;
 477                 drv->assoc_req_ies = NULL;
 478                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 479         }
 480         if (drv->assoc_resp_ies) {
 481                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 482                 drv->assoc_resp_ies = NULL;
 483                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 484         }
 485
 486         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 487
 488         os_free(data.assoc_info.req_ies);
 489         os_free(data.assoc_info.resp_ies);
 490 }
 491
 492
 493 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 494                                            void *ctx, char *data, int len)
 495 {
 496         struct iw_event iwe_buf, *iwe = &iwe_buf;
 497         char *pos, *end, *custom, *buf;
 498
 499         pos = data;
 500         end = data + len;
 501
 502         while (pos + IW_EV_LCP_LEN <= end) {
 503                 /* Event data may be unaligned, so make a local, aligned copy
 504                  * before processing. */
 505                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 506                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 507                            iwe->cmd, iwe->len);
 508                 if (iwe->len <= IW_EV_LCP_LEN)
 509                         return;
 510
 511                 custom = pos + IW_EV_POINT_LEN;
 512                 if (drv->we_version_compiled > 18 &&
 513                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 514                      iwe->cmd == IWEVCUSTOM ||
 515                      iwe->cmd == IWEVASSOCREQIE ||
 516                      iwe->cmd == IWEVASSOCRESPIE ||
 517                      iwe->cmd == IWEVPMKIDCAND)) {
 518                         /* WE-19 removed the pointer from struct iw_point */
 519                         char *dpos = (char *) &iwe_buf.u.data.length;
 520                         int dlen = dpos - (char *) &iwe_buf;
 521                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 522                                   sizeof(struct iw_event) - dlen);
 523                 } else {
 524                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 525                         custom += IW_EV_POINT_OFF;
 526                 }
 527
 528                 switch (iwe->cmd) {
 529                 case SIOCGIWAP:
 530                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 531                                    MACSTR,
 532                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 533                         if (is_zero_ether_addr(
 534                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 535                             os_memcmp(iwe->u.ap_addr.sa_data,
 536                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 537                             0) {
 538                                 os_free(drv->assoc_req_ies);
 539                                 drv->assoc_req_ies = NULL;
 540                                 os_free(drv->assoc_resp_ies);
 541                                 drv->assoc_resp_ies = NULL;
 542                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 543                                                      NULL);
 544
 545                         } else {
 546                                 wpa_driver_nl80211_event_assoc_ies(drv);
 547                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 548                         }
 549                         break;
 550                 case IWEVMICHAELMICFAILURE:
 551                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 552                                 ctx, custom, iwe->u.data.length);
 553                         break;
 554                 case IWEVCUSTOM:
 555                         if (custom + iwe->u.data.length > end)
 556                                 return;
 557                         buf = os_malloc(iwe->u.data.length + 1);
 558                         if (buf == NULL)
 559                                 return;
 560                         os_memcpy(buf, custom, iwe->u.data.length);
 561                         buf[iwe->u.data.length] = '\0';
 562                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 563                         os_free(buf);
 564                         break;
 565                 case SIOCGIWSCAN:
 566                         drv->scan_complete_events = 1;
 567                         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout,
 568                                              drv, ctx);
 569                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 570                         break;
 571                 case IWEVASSOCREQIE:
 572                         wpa_driver_nl80211_event_wireless_assocreqie(
 573                                 drv, custom, iwe->u.data.length);
 574                         break;
 575                 case IWEVASSOCRESPIE:
 576                         wpa_driver_nl80211_event_wireless_assocrespie(
 577                                 drv, custom, iwe->u.data.length);
 578                         break;
 579                 case IWEVPMKIDCAND:
 580                         wpa_driver_nl80211_event_wireless_pmkidcand(
 581                                 drv, custom, iwe->u.data.length);
 582                         break;
 583                 }
 584
 585                 pos += iwe->len;
 586         }
 587 }
 588
 589
 590 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 591                                           void *ctx, char *buf, size_t len,
 592                                           int del)
 593 {
 594         union wpa_event_data event;
 595
 596         os_memset(&event, 0, sizeof(event));
 597         if (len > sizeof(event.interface_status.ifname))
 598                 len = sizeof(event.interface_status.ifname) - 1;
 599         os_memcpy(event.interface_status.ifname, buf, len);
 600         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 601                 EVENT_INTERFACE_ADDED;
 602
 603         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 604                    del ? "DEL" : "NEW",
 605                    event.interface_status.ifname,
 606                    del ? "removed" : "added");
 607
 608         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 609                 if (del)
 610                         drv->if_removed = 1;
 611                 else
 612                         drv->if_removed = 0;
 613         }
 614
 615         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 616 }
 617
 618
 619 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 620                                          struct nlmsghdr *h)
 621 {
 622         struct ifinfomsg *ifi;
 623         int attrlen, _nlmsg_len, rta_len;
 624         struct rtattr *attr;
 625
 626         ifi = NLMSG_DATA(h);
 627
 628         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 629
 630         attrlen = h->nlmsg_len - _nlmsg_len;
 631         if (attrlen < 0)
 632                 return 0;
 633
 634         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 635
 636         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 637         while (RTA_OK(attr, attrlen)) {
 638                 if (attr->rta_type == IFLA_IFNAME) {
 639                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 640                             == 0)
 641                                 return 1;
 642                         else
 643                                 break;
 644                 }
 645                 attr = RTA_NEXT(attr, attrlen);
 646         }
 647
 648         return 0;
 649 }
 650
 651
 652 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 653                                           int ifindex, struct nlmsghdr *h)
 654 {
 655         if (drv->ifindex == ifindex)
 656                 return 1;
 657
 658         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 659                 drv->ifindex = if_nametoindex(drv->ifname);
 660                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 661                            "interface");
 662                 wpa_driver_nl80211_finish_drv_init(drv);
 663                 return 1;
 664         }
 665
 666         return 0;
 667 }
 668
 669
 670 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 671                                               void *ctx, struct nlmsghdr *h,
 672                                               size_t len)
 673 {
 674         struct ifinfomsg *ifi;
 675         int attrlen, _nlmsg_len, rta_len;
 676         struct rtattr * attr;
 677
 678         if (len < sizeof(*ifi))
 679                 return;
 680
 681         ifi = NLMSG_DATA(h);
 682
 683         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 684                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 685                            ifi->ifi_index);
 686                 return;
 687         }
 688
 689         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 690                    "(%s%s%s%s)",
 691                    drv->operstate, ifi->ifi_flags,
 692                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 693                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 694                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 695                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 696         /*
 697          * Some drivers send the association event before the operup event--in
 698          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 699          * fails. This will hit us when wpa_supplicant does not need to do
 700          * IEEE 802.1X authentication
 701          */
 702         if (drv->operstate == 1 &&
 703             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 704             !(ifi->ifi_flags & IFF_RUNNING))
 705                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 706
 707         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 708
 709         attrlen = h->nlmsg_len - _nlmsg_len;
 710         if (attrlen < 0)
 711                 return;
 712
 713         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 714
 715         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 716         while (RTA_OK(attr, attrlen)) {
 717                 if (attr->rta_type == IFLA_WIRELESS) {
 718                         wpa_driver_nl80211_event_wireless(
 719                                 drv, ctx, ((char *) attr) + rta_len,
 720                                 attr->rta_len - rta_len);
 721                 } else if (attr->rta_type == IFLA_IFNAME) {
 722                         wpa_driver_nl80211_event_link(
 723                                 drv, ctx,
 724                                 ((char *) attr) + rta_len,
 725                                 attr->rta_len - rta_len, 0);
 726                 }
 727                 attr = RTA_NEXT(attr, attrlen);
 728         }
 729 }
 730
 731
 732 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 733                                               void *ctx, struct nlmsghdr *h,
 734                                               size_t len)
 735 {
 736         struct ifinfomsg *ifi;
 737         int attrlen, _nlmsg_len, rta_len;
 738         struct rtattr * attr;
 739
 740         if (len < sizeof(*ifi))
 741                 return;
 742
 743         ifi = NLMSG_DATA(h);
 744
 745         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 746
 747         attrlen = h->nlmsg_len - _nlmsg_len;
 748         if (attrlen < 0)
 749                 return;
 750
 751         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 752
 753         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 754         while (RTA_OK(attr, attrlen)) {
 755                 if (attr->rta_type == IFLA_IFNAME) {
 756                         wpa_driver_nl80211_event_link(
 757                                 drv, ctx,
 758                                 ((char *) attr) + rta_len,
 759                                 attr->rta_len - rta_len, 1);
 760                 }
 761                 attr = RTA_NEXT(attr, attrlen);
 762         }
 763 }
 764
 765
 766 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 767                                           void *sock_ctx)
 768 {
 769         char buf[8192];
 770         int left;
 771         struct sockaddr_nl from;
 772         socklen_t fromlen;
 773         struct nlmsghdr *h;
 774         int max_events = 10;
 775
 776 try_again:
 777         fromlen = sizeof(from);
 778         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 779                         (struct sockaddr *) &from, &fromlen);
 780         if (left < 0) {
 781                 if (errno != EINTR && errno != EAGAIN)
 782                         perror("recvfrom(netlink)");
 783                 return;
 784         }
 785
 786         h = (struct nlmsghdr *) buf;
 787         while (left >= (int) sizeof(*h)) {
 788                 int len, plen;
 789
 790                 len = h->nlmsg_len;
 791                 plen = len - sizeof(*h);
 792                 if (len > left || plen < 0) {
 793                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 794                                    "len=%d left=%d plen=%d",
 795                                    len, left, plen);
 796                         break;
 797                 }
 798
 799                 switch (h->nlmsg_type) {
 800                 case RTM_NEWLINK:
 801                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 802                                                           h, plen);
 803                         break;
 804                 case RTM_DELLINK:
 805                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 806                                                           h, plen);
 807                         break;
 808                 }
 809
 810                 len = NLMSG_ALIGN(len);
 811                 left -= len;
 812                 h = (struct nlmsghdr *) ((char *) h + len);
 813         }
 814
 815         if (left > 0) {
 816                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 817                            "message", left);
 818         }
 819
 820         if (--max_events > 0) {
 821                 /*
 822                  * Try to receive all events in one eloop call in order to
 823                  * limit race condition on cases where AssocInfo event, Assoc
 824                  * event, and EAPOL frames are received more or less at the
 825                  * same time. We want to process the event messages first
 826                  * before starting EAPOL processing.
 827                  */
 828                 goto try_again;
 829         }
 830 }
 831
 832
 833 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
 834                                               const char *ifname, int *flags)
 835 {
 836         struct ifreq ifr;
 837
 838         os_memset(&ifr, 0, sizeof(ifr));
 839         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 840         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 841                 perror("ioctl[SIOCGIFFLAGS]");
 842                 return -1;
 843         }
 844         *flags = ifr.ifr_flags & 0xffff;
 845         return 0;
 846 }
 847
 848
 849 /**
 850  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 851  * @drv: driver_nl80211 private data
 852  * @flags: Pointer to returned flags value
 853  * Returns: 0 on success, -1 on failure
 854  */
 855 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
 856                                           int *flags)
 857 {
 858         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
 859 }
 860
 861
 862 static int wpa_driver_nl80211_set_ifflags_ifname(
 863         struct wpa_driver_nl80211_data *drv,
 864         const char *ifname, int flags)
 865 {
 866         struct ifreq ifr;
 867
 868         os_memset(&ifr, 0, sizeof(ifr));
 869         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 870         ifr.ifr_flags = flags & 0xffff;
 871         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 872                 perror("SIOCSIFFLAGS");
 873                 return -1;
 874         }
 875         return 0;
 876 }
 877
 878
 879 /**
 880  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 881  * @drv: driver_nl80211 private data
 882  * @flags: New value for flags
 883  * Returns: 0 on success, -1 on failure
 884  */
 885 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
 886                                           int flags)
 887 {
 888         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
 889 }
 890
 891
 892 /**
 893  * wpa_driver_nl80211_init - Initialize WE driver interface
 894  * @ctx: context to be used when calling wpa_supplicant functions,
 895  * e.g., wpa_supplicant_event()
 896  * @ifname: interface name, e.g., wlan0
 897  * Returns: Pointer to private data, %NULL on failure
 898  */
 899 void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
 900 {
 901         int s;
 902         struct sockaddr_nl local;
 903         struct wpa_driver_nl80211_data *drv;
 904
 905         drv = os_zalloc(sizeof(*drv));
 906         if (drv == NULL)
 907                 return NULL;
 908         drv->ctx = ctx;
 909         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 910
 911         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
 912         if (drv->nl_cb == NULL) {
 913                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
 914                            "callbacks");
 915                 goto err1;
 916         }
 917
 918         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
 919         if (drv->nl_handle == NULL) {
 920                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
 921                            "callbacks");
 922                 goto err2;
 923         }
 924
 925         if (genl_connect(drv->nl_handle)) {
 926                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
 927                            "netlink");
 928                 goto err3;
 929         }
 930
 931         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
 932         if (drv->nl_cache == NULL) {
 933                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
 934                            "netlink cache");
 935                 goto err3;
 936         }
 937
 938         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
 939         if (drv->nl80211 == NULL) {
 940                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
 941                            "found");
 942                 goto err4;
 943         }
 944
 945         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 946         if (drv->ioctl_sock < 0) {
 947                 perror("socket(PF_INET,SOCK_DGRAM)");
 948                 goto err5;
 949         }
 950
 951         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 952         if (s < 0) {
 953                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 954                 goto err6;
 955         }
 956
 957         os_memset(&local, 0, sizeof(local));
 958         local.nl_family = AF_NETLINK;
 959         local.nl_groups = RTMGRP_LINK;
 960         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 961                 perror("bind(netlink)");
 962                 close(s);
 963                 goto err6;
 964         }
 965
 966         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive, drv,
 967                                  ctx);
 968         drv->event_sock = s;
 969
 970         wpa_driver_nl80211_finish_drv_init(drv);
 971
 972         return drv;
 973
 974 err6:
 975         close(drv->ioctl_sock);
 976 err5:
 977         genl_family_put(drv->nl80211);
 978 err4:
 979         nl_cache_free(drv->nl_cache);
 980 err3:
 981         nl_handle_destroy(drv->nl_handle);
 982 err2:
 983         nl_cb_put(drv->nl_cb);
 984 err1:
 985         os_free(drv);
 986         return NULL;
 987 }
 988
 989
 990 static void
 991 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
 992 {
 993         int flags;
 994
 995         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
 996                 printf("Could not get interface '%s' flags\n", drv->ifname);
 997         else if (!(flags & IFF_UP)) {
 998                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
 999                         printf("Could not set interface '%s' UP\n",
1000                                drv->ifname);
1001                 } else {
1002                         /*
1003                          * Wait some time to allow driver to initialize before
1004                          * starting configuring the driver. This seems to be
1005                          * needed at least some drivers that load firmware etc.
1006                          * when the interface is set up.
1007                          */
1008                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1009                                    "a second for the driver to complete "
1010                                    "initialization", drv->ifname);
1011                         sleep(1);
1012                 }
1013         }
1014
1015         /*
1016          * Make sure that the driver does not have any obsolete PMKID entries.
1017          */
1018         wpa_driver_nl80211_flush_pmkid(drv);
1019
1020         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1021                 printf("Could not configure driver to use managed mode\n");
1022         }
1023
1024         wpa_driver_nl80211_get_range(drv);
1025
1026         drv->ifindex = if_nametoindex(drv->ifname);
1027
1028         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1029 }
1030
1031
1032 /**
1033  * wpa_driver_nl80211_deinit - Deinitialize WE driver interface
1034  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1035  *
1036  * Shut down driver interface and processing of driver events. Free
1037  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1038  */
1039 void wpa_driver_nl80211_deinit(void *priv)
1040 {
1041         struct wpa_driver_nl80211_data *drv = priv;
1042         int flags;
1043
1044         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1045
1046         /*
1047          * Clear possibly configured driver parameters in order to make it
1048          * easier to use the driver after wpa_supplicant has been terminated.
1049          */
1050         (void) wpa_driver_nl80211_set_bssid(drv,
1051                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1052
1053         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1054
1055         eloop_unregister_read_sock(drv->event_sock);
1056
1057         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1058                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1059
1060         close(drv->event_sock);
1061         close(drv->ioctl_sock);
1062         os_free(drv->assoc_req_ies);
1063         os_free(drv->assoc_resp_ies);
1064
1065         genl_family_put(drv->nl80211);
1066         nl_cache_free(drv->nl_cache);
1067         nl_handle_destroy(drv->nl_handle);
1068         nl_cb_put(drv->nl_cb);
1069
1070         os_free(drv);
1071 }
1072
1073
1074 /**
1075  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1076  * @eloop_ctx: Unused
1077  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1078  *
1079  * This function can be used as registered timeout when starting a scan to
1080  * generate a scan completed event if the driver does not report this.
1081  */
1082 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1083 {
1084         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1085         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1086 }
1087
1088
1089 /**
1090  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1091  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1092  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1093  *      all SSIDs (either active scan with broadcast SSID or passive
1094  *      scan
1095  * @ssid_len: Length of the SSID
1096  * Returns: 0 on success, -1 on failure
1097  */
1098 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1099 {
1100         struct wpa_driver_nl80211_data *drv = priv;
1101         struct iwreq iwr;
1102         int ret = 0, timeout;
1103         struct iw_scan_req req;
1104
1105         if (ssid_len > IW_ESSID_MAX_SIZE) {
1106                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1107                            __FUNCTION__, (unsigned long) ssid_len);
1108                 return -1;
1109         }
1110
1111         os_memset(&iwr, 0, sizeof(iwr));
1112         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1113
1114         if (ssid && ssid_len) {
1115                 os_memset(&req, 0, sizeof(req));
1116                 req.essid_len = ssid_len;
1117                 req.bssid.sa_family = ARPHRD_ETHER;
1118                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1119                 os_memcpy(req.essid, ssid, ssid_len);
1120                 iwr.u.data.pointer = (caddr_t) &req;
1121                 iwr.u.data.length = sizeof(req);
1122                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1123         }
1124
1125         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1126                 perror("ioctl[SIOCSIWSCAN]");
1127                 ret = -1;
1128         }
1129
1130         /* Not all drivers generate "scan completed" wireless event, so try to
1131          * read results after a timeout. */
1132         timeout = 5;
1133         if (drv->scan_complete_events) {
1134                 /*
1135                  * The driver seems to deliver SIOCGIWSCAN events to notify
1136                  * when scan is complete, so use longer timeout to avoid race
1137                  * conditions with scanning and following association request.
1138                  */
1139                 timeout = 30;
1140         }
1141         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1142                    "seconds", ret, timeout);
1143         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1144         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout, drv,
1145                                drv->ctx);
1146
1147         return ret;
1148 }
1149
1150
1151 static u8 * wpa_driver_nl80211_giwscan(struct wpa_driver_nl80211_data *drv,
1152                                     size_t *len)
1153 {
1154         struct iwreq iwr;
1155         u8 *res_buf;
1156         size_t res_buf_len;
1157
1158         res_buf_len = IW_SCAN_MAX_DATA;
1159         for (;;) {
1160                 res_buf = os_malloc(res_buf_len);
1161                 if (res_buf == NULL)
1162                         return NULL;
1163                 os_memset(&iwr, 0, sizeof(iwr));
1164                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1165                 iwr.u.data.pointer = res_buf;
1166                 iwr.u.data.length = res_buf_len;
1167
1168                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1169                         break;
1170
1171                 if (errno == E2BIG && res_buf_len < 100000) {
1172                         os_free(res_buf);
1173                         res_buf = NULL;
1174                         res_buf_len *= 2;
1175                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1176                                    "trying larger buffer (%lu bytes)",
1177                                    (unsigned long) res_buf_len);
1178                 } else {
1179                         perror("ioctl[SIOCGIWSCAN]");
1180                         os_free(res_buf);
1181                         return NULL;
1182                 }
1183         }
1184
1185         if (iwr.u.data.length > res_buf_len) {
1186                 os_free(res_buf);
1187                 return NULL;
1188         }
1189         *len = iwr.u.data.length;
1190
1191         return res_buf;
1192 }
1193
1194
1195 /*
1196  * Data structure for collecting WEXT scan results. This is needed to allow
1197  * the various methods of reporting IEs to be combined into a single IE buffer.
1198  */
1199 struct wext_scan_data {
1200         struct wpa_scan_res res;
1201         u8 *ie;
1202         size_t ie_len;
1203         u8 ssid[32];
1204         size_t ssid_len;
1205         int maxrate;
1206 };
1207
1208
1209 static void wext_get_scan_mode(struct iw_event *iwe,
1210                                struct wext_scan_data *res)
1211 {
1212         if (iwe->u.mode == IW_MODE_ADHOC)
1213                 res->res.caps |= IEEE80211_CAP_IBSS;
1214         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1215                 res->res.caps |= IEEE80211_CAP_ESS;
1216 }
1217
1218
1219 static void wext_get_scan_ssid(struct iw_event *iwe,
1220                                struct wext_scan_data *res, char *custom,
1221                                char *end)
1222 {
1223         int ssid_len = iwe->u.essid.length;
1224         if (custom + ssid_len > end)
1225                 return;
1226         if (iwe->u.essid.flags &&
1227             ssid_len > 0 &&
1228             ssid_len <= IW_ESSID_MAX_SIZE) {
1229                 os_memcpy(res->ssid, custom, ssid_len);
1230                 res->ssid_len = ssid_len;
1231         }
1232 }
1233
1234
1235 static void wext_get_scan_freq(struct iw_event *iwe,
1236                                struct wext_scan_data *res)
1237 {
1238         int divi = 1000000, i;
1239
1240         if (iwe->u.freq.e == 0) {
1241                 /*
1242                  * Some drivers do not report frequency, but a channel.
1243                  * Try to map this to frequency by assuming they are using
1244                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1245                  * frequency if the driver sends both frequency and channel,
1246                  * since the driver may be sending an A-band channel that we
1247                  * don't handle here.
1248                  */
1249
1250                 if (res->res.freq)
1251                         return;
1252
1253                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1254                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1255                         return;
1256                 } else if (iwe->u.freq.m == 14) {
1257                         res->res.freq = 2484;
1258                         return;
1259                 }
1260         }
1261
1262         if (iwe->u.freq.e > 6) {
1263                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1264                            MACSTR " m=%d e=%d)",
1265                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1266                            iwe->u.freq.e);
1267                 return;
1268         }
1269
1270         for (i = 0; i < iwe->u.freq.e; i++)
1271                 divi /= 10;
1272         res->res.freq = iwe->u.freq.m / divi;
1273 }
1274
1275
1276 static void wext_get_scan_qual(struct iw_event *iwe,
1277                                struct wext_scan_data *res)
1278 {
1279         res->res.qual = iwe->u.qual.qual;
1280         res->res.noise = iwe->u.qual.noise;
1281         res->res.level = iwe->u.qual.level;
1282 }
1283
1284
1285 static void wext_get_scan_encode(struct iw_event *iwe,
1286                                  struct wext_scan_data *res)
1287 {
1288         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1289                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1290 }
1291
1292
1293 static void wext_get_scan_rate(struct iw_event *iwe,
1294                                struct wext_scan_data *res, char *pos,
1295                                char *end)
1296 {
1297         int maxrate;
1298         char *custom = pos + IW_EV_LCP_LEN;
1299         struct iw_param p;
1300         size_t clen;
1301
1302         clen = iwe->len;
1303         if (custom + clen > end)
1304                 return;
1305         maxrate = 0;
1306         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1307                 /* Note: may be misaligned, make a local, aligned copy */
1308                 os_memcpy(&p, custom, sizeof(struct iw_param));
1309                 if (p.value > maxrate)
1310                         maxrate = p.value;
1311                 clen -= sizeof(struct iw_param);
1312                 custom += sizeof(struct iw_param);
1313         }
1314
1315         /* Convert the maxrate from WE-style (b/s units) to
1316          * 802.11 rates (500000 b/s units).
1317          */
1318         res->maxrate = maxrate / 500000;
1319 }
1320
1321
1322 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1323                                     struct wext_scan_data *res, char *custom,
1324                                     char *end)
1325 {
1326         char *genie, *gpos, *gend;
1327         u8 *tmp;
1328
1329         gpos = genie = custom;
1330         gend = genie + iwe->u.data.length;
1331         if (gend > end) {
1332                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1333                 return;
1334         }
1335
1336         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1337         if (tmp == NULL)
1338                 return;
1339         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1340         res->ie = tmp;
1341         res->ie_len += gend - gpos;
1342 }
1343
1344
1345 static void wext_get_scan_custom(struct iw_event *iwe,
1346                                  struct wext_scan_data *res, char *custom,
1347                                  char *end)
1348 {
1349         size_t clen;
1350         u8 *tmp;
1351
1352         clen = iwe->u.data.length;
1353         if (custom + clen > end)
1354                 return;
1355
1356         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1357                 char *spos;
1358                 int bytes;
1359                 spos = custom + 7;
1360                 bytes = custom + clen - spos;
1361                 if (bytes & 1)
1362                         return;
1363                 bytes /= 2;
1364                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1365                 if (tmp == NULL)
1366                         return;
1367                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1368                 res->ie = tmp;
1369                 res->ie_len += bytes;
1370         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1371                 char *spos;
1372                 int bytes;
1373                 spos = custom + 7;
1374                 bytes = custom + clen - spos;
1375                 if (bytes & 1)
1376                         return;
1377                 bytes /= 2;
1378                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1379                 if (tmp == NULL)
1380                         return;
1381                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1382                 res->ie = tmp;
1383                 res->ie_len += bytes;
1384         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1385                 char *spos;
1386                 int bytes;
1387                 u8 bin[8];
1388                 spos = custom + 4;
1389                 bytes = custom + clen - spos;
1390                 if (bytes != 16) {
1391                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1392                         return;
1393                 }
1394                 bytes /= 2;
1395                 hexstr2bin(spos, bin, bytes);
1396                 res->res.tsf += WPA_GET_BE64(bin);
1397         }
1398 }
1399
1400
1401 static int wext_19_iw_point(struct wpa_driver_nl80211_data *drv, u16 cmd)
1402 {
1403         return drv->we_version_compiled > 18 &&
1404                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1405                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1406 }
1407
1408
1409 static void wpa_driver_nl80211_add_scan_entry(struct wpa_scan_results *res,
1410                                            struct wext_scan_data *data)
1411 {
1412         struct wpa_scan_res **tmp;
1413         struct wpa_scan_res *r;
1414         size_t extra_len;
1415         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1416
1417         /* Figure out whether we need to fake any IEs */
1418         pos = data->ie;
1419         end = pos + data->ie_len;
1420         while (pos && pos + 1 < end) {
1421                 if (pos + 2 + pos[1] > end)
1422                         break;
1423                 if (pos[0] == WLAN_EID_SSID)
1424                         ssid_ie = pos;
1425                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1426                         rate_ie = pos;
1427                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1428                         rate_ie = pos;
1429                 pos += 2 + pos[1];
1430         }
1431
1432         extra_len = 0;
1433         if (ssid_ie == NULL)
1434                 extra_len += 2 + data->ssid_len;
1435         if (rate_ie == NULL && data->maxrate)
1436                 extra_len += 3;
1437
1438         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1439         if (r == NULL)
1440                 return;
1441         os_memcpy(r, &data->res, sizeof(*r));
1442         r->ie_len = extra_len + data->ie_len;
1443         pos = (u8 *) (r + 1);
1444         if (ssid_ie == NULL) {
1445                 /*
1446                  * Generate a fake SSID IE since the driver did not report
1447                  * a full IE list.
1448                  */
1449                 *pos++ = WLAN_EID_SSID;
1450                 *pos++ = data->ssid_len;
1451                 os_memcpy(pos, data->ssid, data->ssid_len);
1452                 pos += data->ssid_len;
1453         }
1454         if (rate_ie == NULL && data->maxrate) {
1455                 /*
1456                  * Generate a fake Supported Rates IE since the driver did not
1457                  * report a full IE list.
1458                  */
1459                 *pos++ = WLAN_EID_SUPP_RATES;
1460                 *pos++ = 1;
1461                 *pos++ = data->maxrate;
1462         }
1463         if (data->ie)
1464                 os_memcpy(pos, data->ie, data->ie_len);
1465
1466         tmp = os_realloc(res->res,
1467                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1468         if (tmp == NULL) {
1469                 os_free(r);
1470                 return;
1471         }
1472         tmp[res->num++] = r;
1473         res->res = tmp;
1474 }
1475
1476
1477 /**
1478  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1479  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1480  * Returns: Scan results on success, -1 on failure
1481  */
1482 struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv)
1483 {
1484         struct wpa_driver_nl80211_data *drv = priv;
1485         size_t ap_num = 0, len;
1486         int first;
1487         u8 *res_buf;
1488         struct iw_event iwe_buf, *iwe = &iwe_buf;
1489         char *pos, *end, *custom;
1490         struct wpa_scan_results *res;
1491         struct wext_scan_data data;
1492
1493         res_buf = wpa_driver_nl80211_giwscan(drv, &len);
1494         if (res_buf == NULL)
1495                 return NULL;
1496
1497         ap_num = 0;
1498         first = 1;
1499
1500         res = os_zalloc(sizeof(*res));
1501         if (res == NULL) {
1502                 os_free(res_buf);
1503                 return NULL;
1504         }
1505
1506         pos = (char *) res_buf;
1507         end = (char *) res_buf + len;
1508         os_memset(&data, 0, sizeof(data));
1509
1510         while (pos + IW_EV_LCP_LEN <= end) {
1511                 /* Event data may be unaligned, so make a local, aligned copy
1512                  * before processing. */
1513                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1514                 if (iwe->len <= IW_EV_LCP_LEN)
1515                         break;
1516
1517                 custom = pos + IW_EV_POINT_LEN;
1518                 if (wext_19_iw_point(drv, iwe->cmd)) {
1519                         /* WE-19 removed the pointer from struct iw_point */
1520                         char *dpos = (char *) &iwe_buf.u.data.length;
1521                         int dlen = dpos - (char *) &iwe_buf;
1522                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1523                                   sizeof(struct iw_event) - dlen);
1524                 } else {
1525                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1526                         custom += IW_EV_POINT_OFF;
1527                 }
1528
1529                 switch (iwe->cmd) {
1530                 case SIOCGIWAP:
1531                         if (!first)
1532                                 wpa_driver_nl80211_add_scan_entry(res, &data);
1533                         first = 0;
1534                         os_free(data.ie);
1535                         os_memset(&data, 0, sizeof(data));
1536                         os_memcpy(data.res.bssid,
1537                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1538                         break;
1539                 case SIOCGIWMODE:
1540                         wext_get_scan_mode(iwe, &data);
1541                         break;
1542                 case SIOCGIWESSID:
1543                         wext_get_scan_ssid(iwe, &data, custom, end);
1544                         break;
1545                 case SIOCGIWFREQ:
1546                         wext_get_scan_freq(iwe, &data);
1547                         break;
1548                 case IWEVQUAL:
1549                         wext_get_scan_qual(iwe, &data);
1550                         break;
1551                 case SIOCGIWENCODE:
1552                         wext_get_scan_encode(iwe, &data);
1553                         break;
1554                 case SIOCGIWRATE:
1555                         wext_get_scan_rate(iwe, &data, pos, end);
1556                         break;
1557                 case IWEVGENIE:
1558                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1559                         break;
1560                 case IWEVCUSTOM:
1561                         wext_get_scan_custom(iwe, &data, custom, end);
1562                         break;
1563                 }
1564
1565                 pos += iwe->len;
1566         }
1567         os_free(res_buf);
1568         res_buf = NULL;
1569         if (!first)
1570                 wpa_driver_nl80211_add_scan_entry(res, &data);
1571         os_free(data.ie);
1572
1573         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1574                    (unsigned long) len, (unsigned long) res->num);
1575
1576         return res;
1577 }
1578
1579
1580 static int wpa_driver_nl80211_get_range(void *priv)
1581 {
1582         struct wpa_driver_nl80211_data *drv = priv;
1583         struct iw_range *range;
1584         struct iwreq iwr;
1585         int minlen;
1586         size_t buflen;
1587
1588         /*
1589          * Use larger buffer than struct iw_range in order to allow the
1590          * structure to grow in the future.
1591          */
1592         buflen = sizeof(struct iw_range) + 500;
1593         range = os_zalloc(buflen);
1594         if (range == NULL)
1595                 return -1;
1596
1597         os_memset(&iwr, 0, sizeof(iwr));
1598         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1599         iwr.u.data.pointer = (caddr_t) range;
1600         iwr.u.data.length = buflen;
1601
1602         minlen = ((char *) &range->enc_capa) - (char *) range +
1603                 sizeof(range->enc_capa);
1604
1605         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1606                 perror("ioctl[SIOCGIWRANGE]");
1607                 os_free(range);
1608                 return -1;
1609         } else if (iwr.u.data.length >= minlen &&
1610                    range->we_version_compiled >= 18) {
1611                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1612                            "WE(source)=%d enc_capa=0x%x",
1613                            range->we_version_compiled,
1614                            range->we_version_source,
1615                            range->enc_capa);
1616                 drv->has_capability = 1;
1617                 drv->we_version_compiled = range->we_version_compiled;
1618                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1619                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1620                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1621                 }
1622                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1623                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1624                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1625                 }
1626                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1627                         WPA_DRIVER_CAPA_ENC_WEP104;
1628                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1629                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1630                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1631                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1632                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1633                            drv->capa.key_mgmt, drv->capa.enc);
1634         } else {
1635                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1636                            "assuming WPA is not supported");
1637         }
1638
1639         os_free(range);
1640         return 0;
1641 }
1642
1643
1644 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1645 {
1646         struct wpa_driver_nl80211_data *drv = priv;
1647         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1648
1649         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1650                                               enabled);
1651 }
1652
1653
1654 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1655                                       const u8 *addr, int key_idx,
1656                                       int set_tx, const u8 *seq,
1657                                       size_t seq_len,
1658                                       const u8 *key, size_t key_len)
1659 {
1660         struct wpa_driver_nl80211_data *drv = priv;
1661         int ret = -1, err;
1662         struct nl_msg *msg;
1663
1664         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1665                    "seq_len=%lu key_len=%lu",
1666                    __func__, alg, addr, key_idx, set_tx,
1667                    (unsigned long) seq_len, (unsigned long) key_len);
1668
1669         msg = nlmsg_alloc();
1670         if (msg == NULL)
1671                 return -1;
1672
1673         if (alg == WPA_ALG_NONE) {
1674                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1675                             NL80211_CMD_DEL_KEY, 0);
1676         } else {
1677                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1678                             NL80211_CMD_NEW_KEY, 0);
1679                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1680                 switch (alg) {
1681                 case WPA_ALG_WEP:
1682                         if (key_len == 5)
1683                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1684                                             0x000FAC01);
1685                         else
1686                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1687                                             0x000FAC05);
1688                         break;
1689                 case WPA_ALG_TKIP:
1690                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1691                         break;
1692                 case WPA_ALG_CCMP:
1693                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1694                         break;
1695                 default:
1696                         nlmsg_free(msg);
1697                         return -1;
1698                 }
1699         }
1700
1701         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1702         {
1703                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1704                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1705         }
1706         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1707         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1708
1709         err = 0;
1710         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1711             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
1712                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1713                 nlmsg_free(msg);
1714                 return -1;
1715         }
1716
1717         if (set_tx && alg != WPA_ALG_NONE) {
1718                 nlmsg_free(msg);
1719                 msg = nlmsg_alloc();
1720                 if (msg == NULL)
1721                         return -1;
1722
1723                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1724                             0, NL80211_CMD_SET_KEY, 0);
1725                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1726                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1727                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1728
1729                 err = 0;
1730                 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1731                     (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
1732                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
1733                                    "failed; err=%d", err);
1734                         nlmsg_free(msg);
1735                         return -1;
1736                 }
1737         }
1738
1739         ret = 0;
1740
1741 nla_put_failure:
1742         nlmsg_free(msg);
1743         return ret;
1744 }
1745
1746
1747 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1748                                                int enabled)
1749 {
1750         struct wpa_driver_nl80211_data *drv = priv;
1751         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1752         return wpa_driver_nl80211_set_auth_param(drv,
1753                                               IW_AUTH_TKIP_COUNTERMEASURES,
1754                                               enabled);
1755 }
1756
1757
1758 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
1759                                                 int enabled)
1760 {
1761         struct wpa_driver_nl80211_data *drv = priv;
1762         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1763         drv->use_crypt = enabled;
1764         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1765                                               enabled);
1766 }
1767
1768
1769 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1770                                 const u8 *addr, int cmd, int reason_code)
1771 {
1772         struct iwreq iwr;
1773         struct iw_mlme mlme;
1774         int ret = 0;
1775
1776         os_memset(&iwr, 0, sizeof(iwr));
1777         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1778         os_memset(&mlme, 0, sizeof(mlme));
1779         mlme.cmd = cmd;
1780         mlme.reason_code = reason_code;
1781         mlme.addr.sa_family = ARPHRD_ETHER;
1782         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1783         iwr.u.data.pointer = (caddr_t) &mlme;
1784         iwr.u.data.length = sizeof(mlme);
1785
1786         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1787                 perror("ioctl[SIOCSIWMLME]");
1788                 ret = -1;
1789         }
1790
1791         return ret;
1792 }
1793
1794
1795 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1796                                           int reason_code)
1797 {
1798         struct wpa_driver_nl80211_data *drv = priv;
1799         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1800         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1801 }
1802
1803
1804 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1805                                         int reason_code)
1806 {
1807         struct wpa_driver_nl80211_data *drv = priv;
1808         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1809         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
1810                                     reason_code);
1811 }
1812
1813
1814 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
1815                                       size_t ie_len)
1816 {
1817         struct wpa_driver_nl80211_data *drv = priv;
1818         struct iwreq iwr;
1819         int ret = 0;
1820
1821         os_memset(&iwr, 0, sizeof(iwr));
1822         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1823         iwr.u.data.pointer = (caddr_t) ie;
1824         iwr.u.data.length = ie_len;
1825
1826         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1827                 perror("ioctl[SIOCSIWGENIE]");
1828                 ret = -1;
1829         }
1830
1831         return ret;
1832 }
1833
1834
1835 static int wpa_driver_nl80211_cipher2wext(int cipher)
1836 {
1837         switch (cipher) {
1838         case CIPHER_NONE:
1839                 return IW_AUTH_CIPHER_NONE;
1840         case CIPHER_WEP40:
1841                 return IW_AUTH_CIPHER_WEP40;
1842         case CIPHER_TKIP:
1843                 return IW_AUTH_CIPHER_TKIP;
1844         case CIPHER_CCMP:
1845                 return IW_AUTH_CIPHER_CCMP;
1846         case CIPHER_WEP104:
1847                 return IW_AUTH_CIPHER_WEP104;
1848         default:
1849                 return 0;
1850         }
1851 }
1852
1853
1854 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
1855 {
1856         switch (keymgmt) {
1857         case KEY_MGMT_802_1X:
1858         case KEY_MGMT_802_1X_NO_WPA:
1859                 return IW_AUTH_KEY_MGMT_802_1X;
1860         case KEY_MGMT_PSK:
1861                 return IW_AUTH_KEY_MGMT_PSK;
1862         default:
1863                 return 0;
1864         }
1865 }
1866
1867
1868 static int
1869 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
1870                                   struct wpa_driver_associate_params *params)
1871 {
1872         struct iwreq iwr;
1873         int ret = 0;
1874
1875         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1876                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1877
1878         os_memset(&iwr, 0, sizeof(iwr));
1879         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1880         /* Just changing mode, not actual keys */
1881         iwr.u.encoding.flags = 0;
1882         iwr.u.encoding.pointer = (caddr_t) NULL;
1883         iwr.u.encoding.length = 0;
1884
1885         /*
1886          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1887          * different things. Here they are used to indicate Open System vs.
1888          * Shared Key authentication algorithm. However, some drivers may use
1889          * them to select between open/restricted WEP encrypted (open = allow
1890          * both unencrypted and encrypted frames; restricted = only allow
1891          * encrypted frames).
1892          */
1893
1894         if (!drv->use_crypt) {
1895                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1896         } else {
1897                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1898                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1899                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1900                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1901         }
1902
1903         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1904                 perror("ioctl[SIOCSIWENCODE]");
1905                 ret = -1;
1906         }
1907
1908         return ret;
1909 }
1910
1911
1912 static int wpa_driver_nl80211_associate(
1913         void *priv, struct wpa_driver_associate_params *params)
1914 {
1915         struct wpa_driver_nl80211_data *drv = priv;
1916         int ret = 0;
1917         int allow_unencrypted_eapol;
1918         int value;
1919
1920         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1921
1922         /*
1923          * If the driver did not support SIOCSIWAUTH, fallback to
1924          * SIOCSIWENCODE here.
1925          */
1926         if (drv->auth_alg_fallback &&
1927             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
1928                 ret = -1;
1929
1930         if (!params->bssid &&
1931             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
1932                 ret = -1;
1933
1934         if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
1935                 ret = -1;
1936         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1937          * from configuration, not from here, where only the selected suite is
1938          * available */
1939         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1940             < 0)
1941                 ret = -1;
1942         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1943                 value = IW_AUTH_WPA_VERSION_DISABLED;
1944         else if (params->wpa_ie[0] == WLAN_EID_RSN)
1945                 value = IW_AUTH_WPA_VERSION_WPA2;
1946         else
1947                 value = IW_AUTH_WPA_VERSION_WPA;
1948         if (wpa_driver_nl80211_set_auth_param(drv,
1949                                            IW_AUTH_WPA_VERSION, value) < 0)
1950                 ret = -1;
1951         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
1952         if (wpa_driver_nl80211_set_auth_param(drv,
1953                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1954                 ret = -1;
1955         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
1956         if (wpa_driver_nl80211_set_auth_param(drv,
1957                                            IW_AUTH_CIPHER_GROUP, value) < 0)
1958                 ret = -1;
1959         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
1960         if (wpa_driver_nl80211_set_auth_param(drv,
1961                                            IW_AUTH_KEY_MGMT, value) < 0)
1962                 ret = -1;
1963         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1964                 params->pairwise_suite != CIPHER_NONE ||
1965                 params->group_suite != CIPHER_NONE ||
1966                 params->wpa_ie_len;
1967         if (wpa_driver_nl80211_set_auth_param(drv,
1968                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
1969                 ret = -1;
1970
1971         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1972          * not using WPA. IEEE 802.1X specifies that these frames are not
1973          * encrypted, but WPA encrypts them when pairwise keys are in use. */
1974         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1975             params->key_mgmt_suite == KEY_MGMT_PSK)
1976                 allow_unencrypted_eapol = 0;
1977         else
1978                 allow_unencrypted_eapol = 1;
1979
1980         if (wpa_driver_nl80211_set_auth_param(drv,
1981                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
1982                                            allow_unencrypted_eapol) < 0)
1983                 ret = -1;
1984         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
1985                 ret = -1;
1986         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
1987                 ret = -1;
1988         if (params->bssid &&
1989             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
1990                 ret = -1;
1991
1992         return ret;
1993 }
1994
1995
1996 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
1997 {
1998         struct wpa_driver_nl80211_data *drv = priv;
1999         int algs = 0, res;
2000
2001         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2002                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2003         if (auth_alg & AUTH_ALG_SHARED_KEY)
2004                 algs |= IW_AUTH_ALG_SHARED_KEY;
2005         if (auth_alg & AUTH_ALG_LEAP)
2006                 algs |= IW_AUTH_ALG_LEAP;
2007         if (algs == 0) {
2008                 /* at least one algorithm should be set */
2009                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2010         }
2011
2012         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2013                                              algs);
2014         drv->auth_alg_fallback = res == -2;
2015         return res;
2016 }
2017
2018
2019 /**
2020  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2021  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2022  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2023  * Returns: 0 on success, -1 on failure
2024  */
2025 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2026 {
2027         struct wpa_driver_nl80211_data *drv = priv;
2028         int ret = -1, flags;
2029         struct nl_msg *msg;
2030
2031         msg = nlmsg_alloc();
2032         if (!msg)
2033                 return -1;
2034
2035         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2036                     0, NL80211_CMD_SET_INTERFACE, 0);
2037         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2038         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2039                     mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2040
2041         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2042             nl_wait_for_ack(drv->nl_handle) < 0)
2043                 goto try_again;
2044
2045         nlmsg_free(msg);
2046         return 0;
2047
2048 nla_put_failure:
2049         nlmsg_free(msg);
2050         return -1;
2051
2052 try_again:
2053         /* mac80211 doesn't allow mode changes while the device is up, so
2054          * take the device down, try to set the mode again, and bring the
2055          * device back up.
2056          */
2057         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2058                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2059
2060                 /* Try to set the mode again while the interface is down */
2061                 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2062                     nl_wait_for_ack(drv->nl_handle) < 0) {
2063                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2064                                    "mode", drv->ifname);
2065                 } else
2066                         ret = 0;
2067
2068                 /* Ignore return value of get_ifflags to ensure that the device
2069                  * is always up like it was before this function was called.
2070                  */
2071                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2072                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2073         }
2074
2075         nlmsg_free(msg);
2076         return ret;
2077 }
2078
2079
2080 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2081                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2082 {
2083         struct iwreq iwr;
2084         struct iw_pmksa pmksa;
2085         int ret = 0;
2086
2087         os_memset(&iwr, 0, sizeof(iwr));
2088         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2089         os_memset(&pmksa, 0, sizeof(pmksa));
2090         pmksa.cmd = cmd;
2091         pmksa.bssid.sa_family = ARPHRD_ETHER;
2092         if (bssid)
2093                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2094         if (pmkid)
2095                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2096         iwr.u.data.pointer = (caddr_t) &pmksa;
2097         iwr.u.data.length = sizeof(pmksa);
2098
2099         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2100                 if (errno != EOPNOTSUPP)
2101                         perror("ioctl[SIOCSIWPMKSA]");
2102                 ret = -1;
2103         }
2104
2105         return ret;
2106 }
2107
2108
2109 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2110                                      const u8 *pmkid)
2111 {
2112         struct wpa_driver_nl80211_data *drv = priv;
2113         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2114 }
2115
2116
2117 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2118                                         const u8 *pmkid)
2119 {
2120         struct wpa_driver_nl80211_data *drv = priv;
2121         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2122 }
2123
2124
2125 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2126 {
2127         struct wpa_driver_nl80211_data *drv = priv;
2128         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2129 }
2130
2131
2132 static int wpa_driver_nl80211_get_capa(void *priv,
2133                                        struct wpa_driver_capa *capa)
2134 {
2135         struct wpa_driver_nl80211_data *drv = priv;
2136         if (!drv->has_capability)
2137                 return -1;
2138         os_memcpy(capa, &drv->capa, sizeof(*capa));
2139         return 0;
2140 }
2141
2142
2143 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2144 {
2145         struct wpa_driver_nl80211_data *drv = priv;
2146
2147         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2148                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2149         drv->operstate = state;
2150         return wpa_driver_nl80211_send_oper_ifla(
2151                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2152 }
2153
2154
2155 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2156         .name = "nl80211",
2157         .desc = "Linux nl80211/cfg80211",
2158         .get_bssid = wpa_driver_nl80211_get_bssid,
2159         .get_ssid = wpa_driver_nl80211_get_ssid,
2160         .set_wpa = wpa_driver_nl80211_set_wpa,
2161         .set_key = wpa_driver_nl80211_set_key,
2162         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2163         .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2164         .scan = wpa_driver_nl80211_scan,
2165         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2166         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2167         .disassociate = wpa_driver_nl80211_disassociate,
2168         .associate = wpa_driver_nl80211_associate,
2169         .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2170         .init = wpa_driver_nl80211_init,
2171         .deinit = wpa_driver_nl80211_deinit,
2172         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2173         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2174         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2175         .get_capa = wpa_driver_nl80211_get_capa,
2176         .set_operstate = wpa_driver_nl80211_set_operstate,
2177 };