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 static int wpa_driver_nl80211_send_oper_ifla(
  97         struct wpa_driver_nl80211_data *drv,
  98         int linkmode, int operstate)
  99 {
 100         struct {
 101                 struct nlmsghdr hdr;
 102                 struct ifinfomsg ifinfo;
 103                 char opts[16];
 104         } req;
 105         struct rtattr *rta;
 106         static int nl_seq;
 107         ssize_t ret;
 108
 109         os_memset(&req, 0, sizeof(req));
 110
 111         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 112         req.hdr.nlmsg_type = RTM_SETLINK;
 113         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 114         req.hdr.nlmsg_seq = ++nl_seq;
 115         req.hdr.nlmsg_pid = 0;
 116
 117         req.ifinfo.ifi_family = AF_UNSPEC;
 118         req.ifinfo.ifi_type = 0;
 119         req.ifinfo.ifi_index = drv->ifindex;
 120         req.ifinfo.ifi_flags = 0;
 121         req.ifinfo.ifi_change = 0;
 122
 123         if (linkmode != -1) {
 124                 rta = (struct rtattr *)
 125                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 126                 rta->rta_type = IFLA_LINKMODE;
 127                 rta->rta_len = RTA_LENGTH(sizeof(char));
 128                 *((char *) RTA_DATA(rta)) = linkmode;
 129                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 130                         RTA_LENGTH(sizeof(char));
 131         }
 132         if (operstate != -1) {
 133                 rta = (struct rtattr *)
 134                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 135                 rta->rta_type = IFLA_OPERSTATE;
 136                 rta->rta_len = RTA_LENGTH(sizeof(char));
 137                 *((char *) RTA_DATA(rta)) = operstate;
 138                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 139                         RTA_LENGTH(sizeof(char));
 140         }
 141
 142         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 143                    linkmode, operstate);
 144
 145         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 146         if (ret < 0) {
 147                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 148                            "%s (assume operstate is not supported)",
 149                            strerror(errno));
 150         }
 151
 152         return ret < 0 ? -1 : 0;
 153 }
 154
 155
 156 static int wpa_driver_nl80211_set_auth_param(
 157         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 158 {
 159         struct iwreq iwr;
 160         int ret = 0;
 161
 162         os_memset(&iwr, 0, sizeof(iwr));
 163         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 164         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 165         iwr.u.param.value = value;
 166
 167         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 168                 if (errno != EOPNOTSUPP) {
 169                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 170                                    "value 0x%x) failed: %s)",
 171                                    idx, value, strerror(errno));
 172                 }
 173                 ret = errno == EOPNOTSUPP ? -2 : -1;
 174         }
 175
 176         return ret;
 177 }
 178
 179
 180 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 181 {
 182         struct wpa_driver_nl80211_data *drv = priv;
 183         struct iwreq iwr;
 184         int ret = 0;
 185
 186         os_memset(&iwr, 0, sizeof(iwr));
 187         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 188
 189         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 190                 perror("ioctl[SIOCGIWAP]");
 191                 ret = -1;
 192         }
 193         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 194
 195         return ret;
 196 }
 197
 198
 199 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 200 {
 201         struct wpa_driver_nl80211_data *drv = priv;
 202         struct iwreq iwr;
 203         int ret = 0;
 204
 205         os_memset(&iwr, 0, sizeof(iwr));
 206         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 207         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 208         if (bssid)
 209                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 210         else
 211                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 212
 213         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 214                 perror("ioctl[SIOCSIWAP]");
 215                 ret = -1;
 216         }
 217
 218         return ret;
 219 }
 220
 221
 222 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 223 {
 224         struct wpa_driver_nl80211_data *drv = priv;
 225         struct iwreq iwr;
 226         int ret = 0;
 227
 228         os_memset(&iwr, 0, sizeof(iwr));
 229         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 230         iwr.u.essid.pointer = (caddr_t) ssid;
 231         iwr.u.essid.length = 32;
 232
 233         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 234                 perror("ioctl[SIOCGIWESSID]");
 235                 ret = -1;
 236         } else {
 237                 ret = iwr.u.essid.length;
 238                 if (ret > 32)
 239                         ret = 32;
 240                 /* Some drivers include nul termination in the SSID, so let's
 241                  * remove it here before further processing. WE-21 changes this
 242                  * to explicitly require the length _not_ to include nul
 243                  * termination. */
 244                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 245                     drv->we_version_compiled < 21)
 246                         ret--;
 247         }
 248
 249         return ret;
 250 }
 251
 252
 253 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 254                                        size_t ssid_len)
 255 {
 256         struct wpa_driver_nl80211_data *drv = priv;
 257         struct iwreq iwr;
 258         int ret = 0;
 259         char buf[33];
 260
 261         if (ssid_len > 32)
 262                 return -1;
 263
 264         os_memset(&iwr, 0, sizeof(iwr));
 265         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 266         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 267         iwr.u.essid.flags = (ssid_len != 0);
 268         os_memset(buf, 0, sizeof(buf));
 269         os_memcpy(buf, ssid, ssid_len);
 270         iwr.u.essid.pointer = (caddr_t) buf;
 271         if (drv->we_version_compiled < 21) {
 272                 /* For historic reasons, set SSID length to include one extra
 273                  * character, C string nul termination, even though SSID is
 274                  * really an octet string that should not be presented as a C
 275                  * string. Some Linux drivers decrement the length by one and
 276                  * can thus end up missing the last octet of the SSID if the
 277                  * length is not incremented here. WE-21 changes this to
 278                  * explicitly require the length _not_ to include nul
 279                  * termination. */
 280                 if (ssid_len)
 281                         ssid_len++;
 282         }
 283         iwr.u.essid.length = ssid_len;
 284
 285         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 286                 perror("ioctl[SIOCSIWESSID]");
 287                 ret = -1;
 288         }
 289
 290         return ret;
 291 }
 292
 293
 294 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 295 {
 296         struct wpa_driver_nl80211_data *drv = priv;
 297         struct iwreq iwr;
 298         int ret = 0;
 299
 300         os_memset(&iwr, 0, sizeof(iwr));
 301         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 302         iwr.u.freq.m = freq * 100000;
 303         iwr.u.freq.e = 1;
 304
 305         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 306                 perror("ioctl[SIOCSIWFREQ]");
 307                 ret = -1;
 308         }
 309
 310         return ret;
 311 }
 312
 313
 314 static void
 315 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 316 {
 317         union wpa_event_data data;
 318
 319         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 320                    custom);
 321
 322         os_memset(&data, 0, sizeof(data));
 323         /* Host AP driver */
 324         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 325                 data.michael_mic_failure.unicast =
 326                         os_strstr(custom, " unicast ") != NULL;
 327                 /* TODO: parse parameters(?) */
 328                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 329         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 330                 char *spos;
 331                 int bytes;
 332
 333                 spos = custom + 17;
 334
 335                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 336                 if (!bytes || (bytes & 1))
 337                         return;
 338                 bytes /= 2;
 339
 340                 data.assoc_info.req_ies = os_malloc(bytes);
 341                 if (data.assoc_info.req_ies == NULL)
 342                         return;
 343
 344                 data.assoc_info.req_ies_len = bytes;
 345                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 346
 347                 spos += bytes * 2;
 348
 349                 data.assoc_info.resp_ies = NULL;
 350                 data.assoc_info.resp_ies_len = 0;
 351
 352                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 353                         spos += 9;
 354
 355                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 356                         if (!bytes || (bytes & 1))
 357                                 goto done;
 358                         bytes /= 2;
 359
 360                         data.assoc_info.resp_ies = os_malloc(bytes);
 361                         if (data.assoc_info.resp_ies == NULL)
 362                                 goto done;
 363
 364                         data.assoc_info.resp_ies_len = bytes;
 365                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 366                 }
 367
 368                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 369
 370         done:
 371                 os_free(data.assoc_info.resp_ies);
 372                 os_free(data.assoc_info.req_ies);
 373 #ifdef CONFIG_PEERKEY
 374         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 375                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 376                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 377                                    "STKSTART.request '%s'", custom + 17);
 378                         return;
 379                 }
 380                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 381 #endif /* CONFIG_PEERKEY */
 382         }
 383 }
 384
 385
 386 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 387         void *ctx, const char *ev, size_t len)
 388 {
 389         const struct iw_michaelmicfailure *mic;
 390         union wpa_event_data data;
 391
 392         if (len < sizeof(*mic))
 393                 return -1;
 394
 395         mic = (const struct iw_michaelmicfailure *) ev;
 396
 397         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 398                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 399                    MAC2STR(mic->src_addr.sa_data));
 400
 401         os_memset(&data, 0, sizeof(data));
 402         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 403         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 404
 405         return 0;
 406 }
 407
 408
 409 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 410         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 411 {
 412         const struct iw_pmkid_cand *cand;
 413         union wpa_event_data data;
 414         const u8 *addr;
 415
 416         if (len < sizeof(*cand))
 417                 return -1;
 418
 419         cand = (const struct iw_pmkid_cand *) ev;
 420         addr = (const u8 *) cand->bssid.sa_data;
 421
 422         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 423                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 424                    cand->index, MAC2STR(addr));
 425
 426         os_memset(&data, 0, sizeof(data));
 427         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 428         data.pmkid_candidate.index = cand->index;
 429         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 430         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 431
 432         return 0;
 433 }
 434
 435
 436 static int wpa_driver_nl80211_event_wireless_assocreqie(
 437         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 438 {
 439         if (len < 0)
 440                 return -1;
 441
 442         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 443                     len);
 444         os_free(drv->assoc_req_ies);
 445         drv->assoc_req_ies = os_malloc(len);
 446         if (drv->assoc_req_ies == NULL) {
 447                 drv->assoc_req_ies_len = 0;
 448                 return -1;
 449         }
 450         os_memcpy(drv->assoc_req_ies, ev, len);
 451         drv->assoc_req_ies_len = len;
 452
 453         return 0;
 454 }
 455
 456
 457 static int wpa_driver_nl80211_event_wireless_assocrespie(
 458         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 459 {
 460         if (len < 0)
 461                 return -1;
 462
 463         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 464                     len);
 465         os_free(drv->assoc_resp_ies);
 466         drv->assoc_resp_ies = os_malloc(len);
 467         if (drv->assoc_resp_ies == NULL) {
 468                 drv->assoc_resp_ies_len = 0;
 469                 return -1;
 470         }
 471         os_memcpy(drv->assoc_resp_ies, ev, len);
 472         drv->assoc_resp_ies_len = len;
 473
 474         return 0;
 475 }
 476
 477
 478 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 479 {
 480         union wpa_event_data data;
 481
 482         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 483                 return;
 484
 485         os_memset(&data, 0, sizeof(data));
 486         if (drv->assoc_req_ies) {
 487                 data.assoc_info.req_ies = drv->assoc_req_ies;
 488                 drv->assoc_req_ies = NULL;
 489                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 490         }
 491         if (drv->assoc_resp_ies) {
 492                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 493                 drv->assoc_resp_ies = NULL;
 494                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 495         }
 496
 497         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 498
 499         os_free(data.assoc_info.req_ies);
 500         os_free(data.assoc_info.resp_ies);
 501 }
 502
 503
 504 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 505                                            void *ctx, char *data, int len)
 506 {
 507         struct iw_event iwe_buf, *iwe = &iwe_buf;
 508         char *pos, *end, *custom, *buf;
 509
 510         pos = data;
 511         end = data + len;
 512
 513         while (pos + IW_EV_LCP_LEN <= end) {
 514                 /* Event data may be unaligned, so make a local, aligned copy
 515                  * before processing. */
 516                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 517                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 518                            iwe->cmd, iwe->len);
 519                 if (iwe->len <= IW_EV_LCP_LEN)
 520                         return;
 521
 522                 custom = pos + IW_EV_POINT_LEN;
 523                 if (drv->we_version_compiled > 18 &&
 524                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 525                      iwe->cmd == IWEVCUSTOM ||
 526                      iwe->cmd == IWEVASSOCREQIE ||
 527                      iwe->cmd == IWEVASSOCRESPIE ||
 528                      iwe->cmd == IWEVPMKIDCAND)) {
 529                         /* WE-19 removed the pointer from struct iw_point */
 530                         char *dpos = (char *) &iwe_buf.u.data.length;
 531                         int dlen = dpos - (char *) &iwe_buf;
 532                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 533                                   sizeof(struct iw_event) - dlen);
 534                 } else {
 535                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 536                         custom += IW_EV_POINT_OFF;
 537                 }
 538
 539                 switch (iwe->cmd) {
 540                 case SIOCGIWAP:
 541                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 542                                    MACSTR,
 543                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 544                         if (is_zero_ether_addr(
 545                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 546                             os_memcmp(iwe->u.ap_addr.sa_data,
 547                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 548                             0) {
 549                                 os_free(drv->assoc_req_ies);
 550                                 drv->assoc_req_ies = NULL;
 551                                 os_free(drv->assoc_resp_ies);
 552                                 drv->assoc_resp_ies = NULL;
 553                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 554                                                      NULL);
 555
 556                         } else {
 557                                 wpa_driver_nl80211_event_assoc_ies(drv);
 558                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 559                         }
 560                         break;
 561                 case IWEVMICHAELMICFAILURE:
 562                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 563                                 ctx, custom, iwe->u.data.length);
 564                         break;
 565                 case IWEVCUSTOM:
 566                         if (custom + iwe->u.data.length > end)
 567                                 return;
 568                         buf = os_malloc(iwe->u.data.length + 1);
 569                         if (buf == NULL)
 570                                 return;
 571                         os_memcpy(buf, custom, iwe->u.data.length);
 572                         buf[iwe->u.data.length] = '\0';
 573                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 574                         os_free(buf);
 575                         break;
 576                 case SIOCGIWSCAN:
 577                         drv->scan_complete_events = 1;
 578                         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout,
 579                                              drv, ctx);
 580                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 581                         break;
 582                 case IWEVASSOCREQIE:
 583                         wpa_driver_nl80211_event_wireless_assocreqie(
 584                                 drv, custom, iwe->u.data.length);
 585                         break;
 586                 case IWEVASSOCRESPIE:
 587                         wpa_driver_nl80211_event_wireless_assocrespie(
 588                                 drv, custom, iwe->u.data.length);
 589                         break;
 590                 case IWEVPMKIDCAND:
 591                         wpa_driver_nl80211_event_wireless_pmkidcand(
 592                                 drv, custom, iwe->u.data.length);
 593                         break;
 594                 }
 595
 596                 pos += iwe->len;
 597         }
 598 }
 599
 600
 601 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 602                                           void *ctx, char *buf, size_t len,
 603                                           int del)
 604 {
 605         union wpa_event_data event;
 606
 607         os_memset(&event, 0, sizeof(event));
 608         if (len > sizeof(event.interface_status.ifname))
 609                 len = sizeof(event.interface_status.ifname) - 1;
 610         os_memcpy(event.interface_status.ifname, buf, len);
 611         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 612                 EVENT_INTERFACE_ADDED;
 613
 614         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 615                    del ? "DEL" : "NEW",
 616                    event.interface_status.ifname,
 617                    del ? "removed" : "added");
 618
 619         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 620                 if (del)
 621                         drv->if_removed = 1;
 622                 else
 623                         drv->if_removed = 0;
 624         }
 625
 626         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 627 }
 628
 629
 630 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 631                                          struct nlmsghdr *h)
 632 {
 633         struct ifinfomsg *ifi;
 634         int attrlen, _nlmsg_len, rta_len;
 635         struct rtattr *attr;
 636
 637         ifi = NLMSG_DATA(h);
 638
 639         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 640
 641         attrlen = h->nlmsg_len - _nlmsg_len;
 642         if (attrlen < 0)
 643                 return 0;
 644
 645         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 646
 647         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 648         while (RTA_OK(attr, attrlen)) {
 649                 if (attr->rta_type == IFLA_IFNAME) {
 650                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 651                             == 0)
 652                                 return 1;
 653                         else
 654                                 break;
 655                 }
 656                 attr = RTA_NEXT(attr, attrlen);
 657         }
 658
 659         return 0;
 660 }
 661
 662
 663 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 664                                           int ifindex, struct nlmsghdr *h)
 665 {
 666         if (drv->ifindex == ifindex)
 667                 return 1;
 668
 669         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 670                 drv->ifindex = if_nametoindex(drv->ifname);
 671                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 672                            "interface");
 673                 wpa_driver_nl80211_finish_drv_init(drv);
 674                 return 1;
 675         }
 676
 677         return 0;
 678 }
 679
 680
 681 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 682                                               void *ctx, struct nlmsghdr *h,
 683                                               size_t len)
 684 {
 685         struct ifinfomsg *ifi;
 686         int attrlen, _nlmsg_len, rta_len;
 687         struct rtattr * attr;
 688
 689         if (len < sizeof(*ifi))
 690                 return;
 691
 692         ifi = NLMSG_DATA(h);
 693
 694         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 695                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 696                            ifi->ifi_index);
 697                 return;
 698         }
 699
 700         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 701                    "(%s%s%s%s)",
 702                    drv->operstate, ifi->ifi_flags,
 703                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 704                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 705                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 706                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 707         /*
 708          * Some drivers send the association event before the operup event--in
 709          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 710          * fails. This will hit us when wpa_supplicant does not need to do
 711          * IEEE 802.1X authentication
 712          */
 713         if (drv->operstate == 1 &&
 714             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 715             !(ifi->ifi_flags & IFF_RUNNING))
 716                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 717
 718         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 719
 720         attrlen = h->nlmsg_len - _nlmsg_len;
 721         if (attrlen < 0)
 722                 return;
 723
 724         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 725
 726         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 727         while (RTA_OK(attr, attrlen)) {
 728                 if (attr->rta_type == IFLA_WIRELESS) {
 729                         wpa_driver_nl80211_event_wireless(
 730                                 drv, ctx, ((char *) attr) + rta_len,
 731                                 attr->rta_len - rta_len);
 732                 } else if (attr->rta_type == IFLA_IFNAME) {
 733                         wpa_driver_nl80211_event_link(
 734                                 drv, ctx,
 735                                 ((char *) attr) + rta_len,
 736                                 attr->rta_len - rta_len, 0);
 737                 }
 738                 attr = RTA_NEXT(attr, attrlen);
 739         }
 740 }
 741
 742
 743 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 744                                               void *ctx, struct nlmsghdr *h,
 745                                               size_t len)
 746 {
 747         struct ifinfomsg *ifi;
 748         int attrlen, _nlmsg_len, rta_len;
 749         struct rtattr * attr;
 750
 751         if (len < sizeof(*ifi))
 752                 return;
 753
 754         ifi = NLMSG_DATA(h);
 755
 756         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 757
 758         attrlen = h->nlmsg_len - _nlmsg_len;
 759         if (attrlen < 0)
 760                 return;
 761
 762         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 763
 764         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 765         while (RTA_OK(attr, attrlen)) {
 766                 if (attr->rta_type == IFLA_IFNAME) {
 767                         wpa_driver_nl80211_event_link(
 768                                 drv, ctx,
 769                                 ((char *) attr) + rta_len,
 770                                 attr->rta_len - rta_len, 1);
 771                 }
 772                 attr = RTA_NEXT(attr, attrlen);
 773         }
 774 }
 775
 776
 777 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 778                                           void *sock_ctx)
 779 {
 780         char buf[8192];
 781         int left;
 782         struct sockaddr_nl from;
 783         socklen_t fromlen;
 784         struct nlmsghdr *h;
 785         int max_events = 10;
 786
 787 try_again:
 788         fromlen = sizeof(from);
 789         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 790                         (struct sockaddr *) &from, &fromlen);
 791         if (left < 0) {
 792                 if (errno != EINTR && errno != EAGAIN)
 793                         perror("recvfrom(netlink)");
 794                 return;
 795         }
 796
 797         h = (struct nlmsghdr *) buf;
 798         while (left >= (int) sizeof(*h)) {
 799                 int len, plen;
 800
 801                 len = h->nlmsg_len;
 802                 plen = len - sizeof(*h);
 803                 if (len > left || plen < 0) {
 804                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 805                                    "len=%d left=%d plen=%d",
 806                                    len, left, plen);
 807                         break;
 808                 }
 809
 810                 switch (h->nlmsg_type) {
 811                 case RTM_NEWLINK:
 812                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 813                                                           h, plen);
 814                         break;
 815                 case RTM_DELLINK:
 816                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 817                                                           h, plen);
 818                         break;
 819                 }
 820
 821                 len = NLMSG_ALIGN(len);
 822                 left -= len;
 823                 h = (struct nlmsghdr *) ((char *) h + len);
 824         }
 825
 826         if (left > 0) {
 827                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 828                            "message", left);
 829         }
 830
 831         if (--max_events > 0) {
 832                 /*
 833                  * Try to receive all events in one eloop call in order to
 834                  * limit race condition on cases where AssocInfo event, Assoc
 835                  * event, and EAPOL frames are received more or less at the
 836                  * same time. We want to process the event messages first
 837                  * before starting EAPOL processing.
 838                  */
 839                 goto try_again;
 840         }
 841 }
 842
 843
 844 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
 845                                               const char *ifname, int *flags)
 846 {
 847         struct ifreq ifr;
 848
 849         os_memset(&ifr, 0, sizeof(ifr));
 850         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 851         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 852                 perror("ioctl[SIOCGIFFLAGS]");
 853                 return -1;
 854         }
 855         *flags = ifr.ifr_flags & 0xffff;
 856         return 0;
 857 }
 858
 859
 860 /**
 861  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 862  * @drv: driver_nl80211 private data
 863  * @flags: Pointer to returned flags value
 864  * Returns: 0 on success, -1 on failure
 865  */
 866 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
 867                                           int *flags)
 868 {
 869         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
 870 }
 871
 872
 873 static int wpa_driver_nl80211_set_ifflags_ifname(
 874         struct wpa_driver_nl80211_data *drv,
 875         const char *ifname, int flags)
 876 {
 877         struct ifreq ifr;
 878
 879         os_memset(&ifr, 0, sizeof(ifr));
 880         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 881         ifr.ifr_flags = flags & 0xffff;
 882         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 883                 perror("SIOCSIFFLAGS");
 884                 return -1;
 885         }
 886         return 0;
 887 }
 888
 889
 890 /**
 891  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 892  * @drv: driver_nl80211 private data
 893  * @flags: New value for flags
 894  * Returns: 0 on success, -1 on failure
 895  */
 896 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
 897                                           int flags)
 898 {
 899         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
 900 }
 901
 902
 903 #ifdef CONFIG_CLIENT_MLME
 904
 905 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
 906                            int drop_unencrypted, int userspace_mlme)
 907 {
 908 #ifdef NL80211_CMD_SET_VIF
 909         struct nl_msg *msg;
 910         int ret = -1;
 911
 912         msg = nlmsg_alloc();
 913         if (!msg)
 914                 goto out;
 915
 916         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
 917                     NL80211_CMD_SET_VIF, 0);
 918
 919         if (drop_unencrypted >= 0)
 920                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
 921                            drop_unencrypted);
 922         if (userspace_mlme >= 0)
 923                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
 924                            userspace_mlme);
 925
 926         ret = 0;
 927
 928         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 929
 930         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 931             nl_wait_for_ack(drv->nl_handle) < 0) {
 932                 ret = -1;
 933         }
 934
 935 nla_put_failure:
 936         nlmsg_free(msg);
 937
 938 out:
 939         return ret;
 940 #else /* NL80211_CMD_SET_VIF */
 941         return -1;
 942 #endif /* NL80211_CMD_SET_VIF */
 943 }
 944
 945
 946 static int wpa_driver_nl80211_set_userspace_mlme(
 947         struct wpa_driver_nl80211_data *drv, int enabled)
 948 {
 949         return nl80211_set_vif(drv, -1, enabled);
 950 }
 951
 952
 953 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 954                                  int ifidx)
 955 {
 956         struct nl_msg *msg;
 957
 958         msg = nlmsg_alloc();
 959         if (!msg)
 960                 goto nla_put_failure;
 961
 962         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 963                     0, NL80211_CMD_DEL_INTERFACE, 0);
 964         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 965         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 966             nl_wait_for_ack(drv->nl_handle) < 0) {
 967         nla_put_failure:
 968                 wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
 969         }
 970         nlmsg_free(msg);
 971 }
 972
 973
 974 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
 975                                 const char *ifname, enum nl80211_iftype iftype)
 976 {
 977         struct nl_msg *msg, *flags = NULL;
 978         int ifidx, err;
 979
 980         msg = nlmsg_alloc();
 981         if (!msg)
 982                 return -1;
 983
 984         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 985                     0, NL80211_CMD_NEW_INTERFACE, 0);
 986         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
 987         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 988         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 989
 990         if (iftype == NL80211_IFTYPE_MONITOR) {
 991                 flags = nlmsg_alloc();
 992                 if (!flags)
 993                         goto nla_put_failure;
 994
 995                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 996
 997                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 998
 999                 nlmsg_free(flags);
1000
1001                 if (err)
1002                         goto nla_put_failure;
1003         }
1004
1005         err = nl_send_auto_complete(drv->nl_handle, msg);
1006         if (err < 0)
1007                 wpa_printf(MSG_ERROR, "nl80211: nl_send_auto_complete failed: "
1008                            "%d (create_iface)", err);
1009         else {
1010                 err = nl_wait_for_ack(drv->nl_handle);
1011                 if (err < 0)
1012                         wpa_printf(MSG_ERROR, "nl80211: nl_wait_for_ack "
1013                                    "failed: %d (create_iface)", err);
1014         }
1015         if (err < 0) {
1016  nla_put_failure:
1017                 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface "
1018                            "%s.", ifname);
1019                 nlmsg_free(msg);
1020                 return -1;
1021         }
1022
1023         nlmsg_free(msg);
1024
1025         ifidx = if_nametoindex(ifname);
1026         if (ifidx <= 0)
1027                 return -1;
1028
1029         return ifidx;
1030 }
1031
1032
1033 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1034 {
1035         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1036         int len;
1037         unsigned char buf[3000];
1038         struct ieee80211_radiotap_iterator iter;
1039         int ret;
1040         int injected = 0, failed = 0, rxflags = 0;
1041         struct ieee80211_rx_status rx_status;
1042
1043         len = recv(sock, buf, sizeof(buf), 0);
1044         if (len < 0) {
1045                 perror("recv");
1046                 return;
1047         }
1048
1049         if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1050                 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1051                            "frame");
1052                 return;
1053         }
1054
1055         os_memset(&rx_status, 0, sizeof(rx_status));
1056
1057         while (1) {
1058                 ret = ieee80211_radiotap_iterator_next(&iter);
1059                 if (ret == -ENOENT)
1060                         break;
1061                 if (ret) {
1062                         wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1063                                    "radiotap frame (%d)", ret);
1064                         return;
1065                 }
1066                 switch (iter.this_arg_index) {
1067                 case IEEE80211_RADIOTAP_FLAGS:
1068                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1069                                 len -= 4;
1070                         break;
1071                 case IEEE80211_RADIOTAP_RX_FLAGS:
1072                         rxflags = 1;
1073                         break;
1074                 case IEEE80211_RADIOTAP_TX_FLAGS:
1075                         injected = 1;
1076                         failed = le_to_host16((*(u16 *) iter.this_arg)) &
1077                                 IEEE80211_RADIOTAP_F_TX_FAIL;
1078                         break;
1079                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1080                         break;
1081                 case IEEE80211_RADIOTAP_CHANNEL:
1082                         /* TODO convert from freq/flags to channel number
1083                          * rx_status.channel = XXX;
1084                         */
1085                         break;
1086                 case IEEE80211_RADIOTAP_RATE:
1087                         break;
1088                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1089                         rx_status.ssi = *iter.this_arg;
1090                         break;
1091                 }
1092         }
1093
1094         if (rxflags && injected)
1095                 return;
1096
1097         if (!injected) {
1098                 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1099                                       len - iter.max_length, &rx_status);
1100         } else if (failed) {
1101                 /* TX failure callback */
1102         } else {
1103                 /* TX success (ACK) callback */
1104         }
1105 }
1106
1107
1108 static int wpa_driver_nl80211_create_monitor_interface(
1109         struct wpa_driver_nl80211_data *drv)
1110 {
1111         char buf[IFNAMSIZ];
1112         struct sockaddr_ll ll;
1113         int optval, flags;
1114         socklen_t optlen;
1115
1116         os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1117         buf[IFNAMSIZ - 1] = '\0';
1118
1119         drv->monitor_ifidx =
1120                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1121
1122         if (drv->monitor_ifidx < 0)
1123                 return -1;
1124
1125         if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1126             wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1127             0) {
1128                 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1129                            "UP", buf);
1130                 goto error;
1131         }
1132
1133         os_memset(&ll, 0, sizeof(ll));
1134         ll.sll_family = AF_PACKET;
1135         ll.sll_ifindex = drv->monitor_ifidx;
1136         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1137         if (drv->monitor_sock < 0) {
1138                 perror("socket[PF_PACKET,SOCK_RAW]");
1139                 goto error;
1140         }
1141
1142         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1143                  sizeof(ll)) < 0) {
1144                 perror("monitor socket bind");
1145                 goto error;
1146         }
1147
1148         optlen = sizeof(optval);
1149         optval = 20;
1150         if (setsockopt
1151             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1152                 perror("Failed to set socket priority");
1153                 goto error;
1154         }
1155
1156         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1157                                      drv, NULL)) {
1158                 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1159                            "read socket");
1160                 goto error;
1161         }
1162
1163         return 0;
1164
1165  error:
1166         nl80211_remove_iface(drv, drv->monitor_ifidx);
1167         return -1;
1168 }
1169
1170 #endif /* CONFIG_CLIENT_MLME */
1171
1172
1173 /**
1174  * wpa_driver_nl80211_init - Initialize WE driver interface
1175  * @ctx: context to be used when calling wpa_supplicant functions,
1176  * e.g., wpa_supplicant_event()
1177  * @ifname: interface name, e.g., wlan0
1178  * Returns: Pointer to private data, %NULL on failure
1179  */
1180 void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1181 {
1182         int s;
1183         struct sockaddr_nl local;
1184         struct wpa_driver_nl80211_data *drv;
1185
1186         drv = os_zalloc(sizeof(*drv));
1187         if (drv == NULL)
1188                 return NULL;
1189         drv->ctx = ctx;
1190         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1191
1192         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1193         if (drv->nl_cb == NULL) {
1194                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1195                            "callbacks");
1196                 goto err1;
1197         }
1198
1199         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1200         if (drv->nl_handle == NULL) {
1201                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1202                            "callbacks");
1203                 goto err2;
1204         }
1205
1206         if (genl_connect(drv->nl_handle)) {
1207                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1208                            "netlink");
1209                 goto err3;
1210         }
1211
1212         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1213         if (drv->nl_cache == NULL) {
1214                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1215                            "netlink cache");
1216                 goto err3;
1217         }
1218
1219         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1220         if (drv->nl80211 == NULL) {
1221                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1222                            "found");
1223                 goto err4;
1224         }
1225
1226         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1227         if (drv->ioctl_sock < 0) {
1228                 perror("socket(PF_INET,SOCK_DGRAM)");
1229                 goto err5;
1230         }
1231
1232         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1233         if (s < 0) {
1234                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1235                 goto err6;
1236         }
1237
1238         os_memset(&local, 0, sizeof(local));
1239         local.nl_family = AF_NETLINK;
1240         local.nl_groups = RTMGRP_LINK;
1241         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1242                 perror("bind(netlink)");
1243                 close(s);
1244                 goto err6;
1245         }
1246
1247         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive, drv,
1248                                  ctx);
1249         drv->event_sock = s;
1250
1251         wpa_driver_nl80211_finish_drv_init(drv);
1252
1253         return drv;
1254
1255 err6:
1256         close(drv->ioctl_sock);
1257 err5:
1258         genl_family_put(drv->nl80211);
1259 err4:
1260         nl_cache_free(drv->nl_cache);
1261 err3:
1262         nl_handle_destroy(drv->nl_handle);
1263 err2:
1264         nl_cb_put(drv->nl_cb);
1265 err1:
1266         os_free(drv);
1267         return NULL;
1268 }
1269
1270
1271 static void
1272 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1273 {
1274         int flags;
1275
1276         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
1277                 printf("Could not get interface '%s' flags\n", drv->ifname);
1278         else if (!(flags & IFF_UP)) {
1279                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1280                         printf("Could not set interface '%s' UP\n",
1281                                drv->ifname);
1282                 } else {
1283                         /*
1284                          * Wait some time to allow driver to initialize before
1285                          * starting configuring the driver. This seems to be
1286                          * needed at least some drivers that load firmware etc.
1287                          * when the interface is set up.
1288                          */
1289                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1290                                    "a second for the driver to complete "
1291                                    "initialization", drv->ifname);
1292                         sleep(1);
1293                 }
1294         }
1295
1296         /*
1297          * Make sure that the driver does not have any obsolete PMKID entries.
1298          */
1299         wpa_driver_nl80211_flush_pmkid(drv);
1300
1301         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1302                 printf("Could not configure driver to use managed mode\n");
1303         }
1304
1305         wpa_driver_nl80211_get_range(drv);
1306
1307         drv->ifindex = if_nametoindex(drv->ifname);
1308
1309         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1310 }
1311
1312
1313 /**
1314  * wpa_driver_nl80211_deinit - Deinitialize WE driver interface
1315  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1316  *
1317  * Shut down driver interface and processing of driver events. Free
1318  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1319  */
1320 void wpa_driver_nl80211_deinit(void *priv)
1321 {
1322         struct wpa_driver_nl80211_data *drv = priv;
1323         int flags;
1324
1325 #ifdef CONFIG_CLIENT_MLME
1326         if (drv->monitor_sock >= 0) {
1327                 eloop_unregister_read_sock(drv->monitor_sock);
1328                 close(drv->monitor_sock);
1329         }
1330         if (drv->monitor_ifidx > 0)
1331                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1332         if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1333                 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1334 #endif /* CONFIG_CLIENT_MLME */
1335
1336         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1337
1338         /*
1339          * Clear possibly configured driver parameters in order to make it
1340          * easier to use the driver after wpa_supplicant has been terminated.
1341          */
1342         (void) wpa_driver_nl80211_set_bssid(drv,
1343                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1344
1345         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1346
1347         eloop_unregister_read_sock(drv->event_sock);
1348
1349         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1350                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1351
1352         close(drv->event_sock);
1353         close(drv->ioctl_sock);
1354         os_free(drv->assoc_req_ies);
1355         os_free(drv->assoc_resp_ies);
1356
1357         genl_family_put(drv->nl80211);
1358         nl_cache_free(drv->nl_cache);
1359         nl_handle_destroy(drv->nl_handle);
1360         nl_cb_put(drv->nl_cb);
1361
1362         os_free(drv);
1363 }
1364
1365
1366 /**
1367  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1368  * @eloop_ctx: Unused
1369  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1370  *
1371  * This function can be used as registered timeout when starting a scan to
1372  * generate a scan completed event if the driver does not report this.
1373  */
1374 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1375 {
1376         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1377         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1378 }
1379
1380
1381 /**
1382  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1383  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1384  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1385  *      all SSIDs (either active scan with broadcast SSID or passive
1386  *      scan
1387  * @ssid_len: Length of the SSID
1388  * Returns: 0 on success, -1 on failure
1389  */
1390 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1391 {
1392         struct wpa_driver_nl80211_data *drv = priv;
1393         struct iwreq iwr;
1394         int ret = 0, timeout;
1395         struct iw_scan_req req;
1396
1397         if (ssid_len > IW_ESSID_MAX_SIZE) {
1398                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1399                            __FUNCTION__, (unsigned long) ssid_len);
1400                 return -1;
1401         }
1402
1403         os_memset(&iwr, 0, sizeof(iwr));
1404         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1405
1406         if (ssid && ssid_len) {
1407                 os_memset(&req, 0, sizeof(req));
1408                 req.essid_len = ssid_len;
1409                 req.bssid.sa_family = ARPHRD_ETHER;
1410                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1411                 os_memcpy(req.essid, ssid, ssid_len);
1412                 iwr.u.data.pointer = (caddr_t) &req;
1413                 iwr.u.data.length = sizeof(req);
1414                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1415         }
1416
1417         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1418                 perror("ioctl[SIOCSIWSCAN]");
1419                 ret = -1;
1420         }
1421
1422         /* Not all drivers generate "scan completed" wireless event, so try to
1423          * read results after a timeout. */
1424         timeout = 5;
1425         if (drv->scan_complete_events) {
1426                 /*
1427                  * The driver seems to deliver SIOCGIWSCAN events to notify
1428                  * when scan is complete, so use longer timeout to avoid race
1429                  * conditions with scanning and following association request.
1430                  */
1431                 timeout = 30;
1432         }
1433         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1434                    "seconds", ret, timeout);
1435         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1436         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout, drv,
1437                                drv->ctx);
1438
1439         return ret;
1440 }
1441
1442
1443 static u8 * wpa_driver_nl80211_giwscan(struct wpa_driver_nl80211_data *drv,
1444                                     size_t *len)
1445 {
1446         struct iwreq iwr;
1447         u8 *res_buf;
1448         size_t res_buf_len;
1449
1450         res_buf_len = IW_SCAN_MAX_DATA;
1451         for (;;) {
1452                 res_buf = os_malloc(res_buf_len);
1453                 if (res_buf == NULL)
1454                         return NULL;
1455                 os_memset(&iwr, 0, sizeof(iwr));
1456                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1457                 iwr.u.data.pointer = res_buf;
1458                 iwr.u.data.length = res_buf_len;
1459
1460                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1461                         break;
1462
1463                 if (errno == E2BIG && res_buf_len < 100000) {
1464                         os_free(res_buf);
1465                         res_buf = NULL;
1466                         res_buf_len *= 2;
1467                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1468                                    "trying larger buffer (%lu bytes)",
1469                                    (unsigned long) res_buf_len);
1470                 } else {
1471                         perror("ioctl[SIOCGIWSCAN]");
1472                         os_free(res_buf);
1473                         return NULL;
1474                 }
1475         }
1476
1477         if (iwr.u.data.length > res_buf_len) {
1478                 os_free(res_buf);
1479                 return NULL;
1480         }
1481         *len = iwr.u.data.length;
1482
1483         return res_buf;
1484 }
1485
1486
1487 /*
1488  * Data structure for collecting WEXT scan results. This is needed to allow
1489  * the various methods of reporting IEs to be combined into a single IE buffer.
1490  */
1491 struct wext_scan_data {
1492         struct wpa_scan_res res;
1493         u8 *ie;
1494         size_t ie_len;
1495         u8 ssid[32];
1496         size_t ssid_len;
1497         int maxrate;
1498 };
1499
1500
1501 static void wext_get_scan_mode(struct iw_event *iwe,
1502                                struct wext_scan_data *res)
1503 {
1504         if (iwe->u.mode == IW_MODE_ADHOC)
1505                 res->res.caps |= IEEE80211_CAP_IBSS;
1506         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1507                 res->res.caps |= IEEE80211_CAP_ESS;
1508 }
1509
1510
1511 static void wext_get_scan_ssid(struct iw_event *iwe,
1512                                struct wext_scan_data *res, char *custom,
1513                                char *end)
1514 {
1515         int ssid_len = iwe->u.essid.length;
1516         if (custom + ssid_len > end)
1517                 return;
1518         if (iwe->u.essid.flags &&
1519             ssid_len > 0 &&
1520             ssid_len <= IW_ESSID_MAX_SIZE) {
1521                 os_memcpy(res->ssid, custom, ssid_len);
1522                 res->ssid_len = ssid_len;
1523         }
1524 }
1525
1526
1527 static void wext_get_scan_freq(struct iw_event *iwe,
1528                                struct wext_scan_data *res)
1529 {
1530         int divi = 1000000, i;
1531
1532         if (iwe->u.freq.e == 0) {
1533                 /*
1534                  * Some drivers do not report frequency, but a channel.
1535                  * Try to map this to frequency by assuming they are using
1536                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1537                  * frequency if the driver sends both frequency and channel,
1538                  * since the driver may be sending an A-band channel that we
1539                  * don't handle here.
1540                  */
1541
1542                 if (res->res.freq)
1543                         return;
1544
1545                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1546                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1547                         return;
1548                 } else if (iwe->u.freq.m == 14) {
1549                         res->res.freq = 2484;
1550                         return;
1551                 }
1552         }
1553
1554         if (iwe->u.freq.e > 6) {
1555                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1556                            MACSTR " m=%d e=%d)",
1557                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1558                            iwe->u.freq.e);
1559                 return;
1560         }
1561
1562         for (i = 0; i < iwe->u.freq.e; i++)
1563                 divi /= 10;
1564         res->res.freq = iwe->u.freq.m / divi;
1565 }
1566
1567
1568 static void wext_get_scan_qual(struct iw_event *iwe,
1569                                struct wext_scan_data *res)
1570 {
1571         res->res.qual = iwe->u.qual.qual;
1572         res->res.noise = iwe->u.qual.noise;
1573         res->res.level = iwe->u.qual.level;
1574 }
1575
1576
1577 static void wext_get_scan_encode(struct iw_event *iwe,
1578                                  struct wext_scan_data *res)
1579 {
1580         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1581                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1582 }
1583
1584
1585 static void wext_get_scan_rate(struct iw_event *iwe,
1586                                struct wext_scan_data *res, char *pos,
1587                                char *end)
1588 {
1589         int maxrate;
1590         char *custom = pos + IW_EV_LCP_LEN;
1591         struct iw_param p;
1592         size_t clen;
1593
1594         clen = iwe->len;
1595         if (custom + clen > end)
1596                 return;
1597         maxrate = 0;
1598         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1599                 /* Note: may be misaligned, make a local, aligned copy */
1600                 os_memcpy(&p, custom, sizeof(struct iw_param));
1601                 if (p.value > maxrate)
1602                         maxrate = p.value;
1603                 clen -= sizeof(struct iw_param);
1604                 custom += sizeof(struct iw_param);
1605         }
1606
1607         /* Convert the maxrate from WE-style (b/s units) to
1608          * 802.11 rates (500000 b/s units).
1609          */
1610         res->maxrate = maxrate / 500000;
1611 }
1612
1613
1614 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1615                                     struct wext_scan_data *res, char *custom,
1616                                     char *end)
1617 {
1618         char *genie, *gpos, *gend;
1619         u8 *tmp;
1620
1621         if (iwe->u.data.length == 0)
1622                 return;
1623
1624         gpos = genie = custom;
1625         gend = genie + iwe->u.data.length;
1626         if (gend > end) {
1627                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1628                 return;
1629         }
1630
1631         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1632         if (tmp == NULL)
1633                 return;
1634         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1635         res->ie = tmp;
1636         res->ie_len += gend - gpos;
1637 }
1638
1639
1640 static void wext_get_scan_custom(struct iw_event *iwe,
1641                                  struct wext_scan_data *res, char *custom,
1642                                  char *end)
1643 {
1644         size_t clen;
1645         u8 *tmp;
1646
1647         clen = iwe->u.data.length;
1648         if (custom + clen > end)
1649                 return;
1650
1651         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1652                 char *spos;
1653                 int bytes;
1654                 spos = custom + 7;
1655                 bytes = custom + clen - spos;
1656                 if (bytes & 1 || bytes == 0)
1657                         return;
1658                 bytes /= 2;
1659                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1660                 if (tmp == NULL)
1661                         return;
1662                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1663                 res->ie = tmp;
1664                 res->ie_len += bytes;
1665         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1666                 char *spos;
1667                 int bytes;
1668                 spos = custom + 7;
1669                 bytes = custom + clen - spos;
1670                 if (bytes & 1 || bytes == 0)
1671                         return;
1672                 bytes /= 2;
1673                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1674                 if (tmp == NULL)
1675                         return;
1676                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1677                 res->ie = tmp;
1678                 res->ie_len += bytes;
1679         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1680                 char *spos;
1681                 int bytes;
1682                 u8 bin[8];
1683                 spos = custom + 4;
1684                 bytes = custom + clen - spos;
1685                 if (bytes != 16) {
1686                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1687                         return;
1688                 }
1689                 bytes /= 2;
1690                 hexstr2bin(spos, bin, bytes);
1691                 res->res.tsf += WPA_GET_BE64(bin);
1692         }
1693 }
1694
1695
1696 static int wext_19_iw_point(struct wpa_driver_nl80211_data *drv, u16 cmd)
1697 {
1698         return drv->we_version_compiled > 18 &&
1699                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1700                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1701 }
1702
1703
1704 static void wpa_driver_nl80211_add_scan_entry(struct wpa_scan_results *res,
1705                                            struct wext_scan_data *data)
1706 {
1707         struct wpa_scan_res **tmp;
1708         struct wpa_scan_res *r;
1709         size_t extra_len;
1710         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1711
1712         /* Figure out whether we need to fake any IEs */
1713         pos = data->ie;
1714         end = pos + data->ie_len;
1715         while (pos && pos + 1 < end) {
1716                 if (pos + 2 + pos[1] > end)
1717                         break;
1718                 if (pos[0] == WLAN_EID_SSID)
1719                         ssid_ie = pos;
1720                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1721                         rate_ie = pos;
1722                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1723                         rate_ie = pos;
1724                 pos += 2 + pos[1];
1725         }
1726
1727         extra_len = 0;
1728         if (ssid_ie == NULL)
1729                 extra_len += 2 + data->ssid_len;
1730         if (rate_ie == NULL && data->maxrate)
1731                 extra_len += 3;
1732
1733         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1734         if (r == NULL)
1735                 return;
1736         os_memcpy(r, &data->res, sizeof(*r));
1737         r->ie_len = extra_len + data->ie_len;
1738         pos = (u8 *) (r + 1);
1739         if (ssid_ie == NULL) {
1740                 /*
1741                  * Generate a fake SSID IE since the driver did not report
1742                  * a full IE list.
1743                  */
1744                 *pos++ = WLAN_EID_SSID;
1745                 *pos++ = data->ssid_len;
1746                 os_memcpy(pos, data->ssid, data->ssid_len);
1747                 pos += data->ssid_len;
1748         }
1749         if (rate_ie == NULL && data->maxrate) {
1750                 /*
1751                  * Generate a fake Supported Rates IE since the driver did not
1752                  * report a full IE list.
1753                  */
1754                 *pos++ = WLAN_EID_SUPP_RATES;
1755                 *pos++ = 1;
1756                 *pos++ = data->maxrate;
1757         }
1758         if (data->ie)
1759                 os_memcpy(pos, data->ie, data->ie_len);
1760
1761         tmp = os_realloc(res->res,
1762                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1763         if (tmp == NULL) {
1764                 os_free(r);
1765                 return;
1766         }
1767         tmp[res->num++] = r;
1768         res->res = tmp;
1769 }
1770
1771
1772 /**
1773  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1774  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1775  * Returns: Scan results on success, -1 on failure
1776  */
1777 struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv)
1778 {
1779         struct wpa_driver_nl80211_data *drv = priv;
1780         size_t ap_num = 0, len;
1781         int first;
1782         u8 *res_buf;
1783         struct iw_event iwe_buf, *iwe = &iwe_buf;
1784         char *pos, *end, *custom;
1785         struct wpa_scan_results *res;
1786         struct wext_scan_data data;
1787
1788         res_buf = wpa_driver_nl80211_giwscan(drv, &len);
1789         if (res_buf == NULL)
1790                 return NULL;
1791
1792         ap_num = 0;
1793         first = 1;
1794
1795         res = os_zalloc(sizeof(*res));
1796         if (res == NULL) {
1797                 os_free(res_buf);
1798                 return NULL;
1799         }
1800
1801         pos = (char *) res_buf;
1802         end = (char *) res_buf + len;
1803         os_memset(&data, 0, sizeof(data));
1804
1805         while (pos + IW_EV_LCP_LEN <= end) {
1806                 /* Event data may be unaligned, so make a local, aligned copy
1807                  * before processing. */
1808                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1809                 if (iwe->len <= IW_EV_LCP_LEN)
1810                         break;
1811
1812                 custom = pos + IW_EV_POINT_LEN;
1813                 if (wext_19_iw_point(drv, iwe->cmd)) {
1814                         /* WE-19 removed the pointer from struct iw_point */
1815                         char *dpos = (char *) &iwe_buf.u.data.length;
1816                         int dlen = dpos - (char *) &iwe_buf;
1817                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1818                                   sizeof(struct iw_event) - dlen);
1819                 } else {
1820                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1821                         custom += IW_EV_POINT_OFF;
1822                 }
1823
1824                 switch (iwe->cmd) {
1825                 case SIOCGIWAP:
1826                         if (!first)
1827                                 wpa_driver_nl80211_add_scan_entry(res, &data);
1828                         first = 0;
1829                         os_free(data.ie);
1830                         os_memset(&data, 0, sizeof(data));
1831                         os_memcpy(data.res.bssid,
1832                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1833                         break;
1834                 case SIOCGIWMODE:
1835                         wext_get_scan_mode(iwe, &data);
1836                         break;
1837                 case SIOCGIWESSID:
1838                         wext_get_scan_ssid(iwe, &data, custom, end);
1839                         break;
1840                 case SIOCGIWFREQ:
1841                         wext_get_scan_freq(iwe, &data);
1842                         break;
1843                 case IWEVQUAL:
1844                         wext_get_scan_qual(iwe, &data);
1845                         break;
1846                 case SIOCGIWENCODE:
1847                         wext_get_scan_encode(iwe, &data);
1848                         break;
1849                 case SIOCGIWRATE:
1850                         wext_get_scan_rate(iwe, &data, pos, end);
1851                         break;
1852                 case IWEVGENIE:
1853                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1854                         break;
1855                 case IWEVCUSTOM:
1856                         wext_get_scan_custom(iwe, &data, custom, end);
1857                         break;
1858                 }
1859
1860                 pos += iwe->len;
1861         }
1862         os_free(res_buf);
1863         res_buf = NULL;
1864         if (!first)
1865                 wpa_driver_nl80211_add_scan_entry(res, &data);
1866         os_free(data.ie);
1867
1868         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1869                    (unsigned long) len, (unsigned long) res->num);
1870
1871         return res;
1872 }
1873
1874
1875 static int wpa_driver_nl80211_get_range(void *priv)
1876 {
1877         struct wpa_driver_nl80211_data *drv = priv;
1878         struct iw_range *range;
1879         struct iwreq iwr;
1880         int minlen;
1881         size_t buflen;
1882
1883         /*
1884          * Use larger buffer than struct iw_range in order to allow the
1885          * structure to grow in the future.
1886          */
1887         buflen = sizeof(struct iw_range) + 500;
1888         range = os_zalloc(buflen);
1889         if (range == NULL)
1890                 return -1;
1891
1892         os_memset(&iwr, 0, sizeof(iwr));
1893         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1894         iwr.u.data.pointer = (caddr_t) range;
1895         iwr.u.data.length = buflen;
1896
1897         minlen = ((char *) &range->enc_capa) - (char *) range +
1898                 sizeof(range->enc_capa);
1899
1900         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1901                 perror("ioctl[SIOCGIWRANGE]");
1902                 os_free(range);
1903                 return -1;
1904         } else if (iwr.u.data.length >= minlen &&
1905                    range->we_version_compiled >= 18) {
1906                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1907                            "WE(source)=%d enc_capa=0x%x",
1908                            range->we_version_compiled,
1909                            range->we_version_source,
1910                            range->enc_capa);
1911                 drv->has_capability = 1;
1912                 drv->we_version_compiled = range->we_version_compiled;
1913                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1914                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1915                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1916                 }
1917                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1918                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1919                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1920                 }
1921                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1922                         WPA_DRIVER_CAPA_ENC_WEP104;
1923                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1924                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1925                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1926                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1927                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1928                            drv->capa.key_mgmt, drv->capa.enc);
1929         } else {
1930                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1931                            "assuming WPA is not supported");
1932         }
1933
1934         os_free(range);
1935         return 0;
1936 }
1937
1938
1939 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1940 {
1941         struct wpa_driver_nl80211_data *drv = priv;
1942         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1943
1944         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1945                                               enabled);
1946 }
1947
1948
1949 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1950                                       const u8 *addr, int key_idx,
1951                                       int set_tx, const u8 *seq,
1952                                       size_t seq_len,
1953                                       const u8 *key, size_t key_len)
1954 {
1955         struct wpa_driver_nl80211_data *drv = priv;
1956         int ret = -1, err;
1957         struct nl_msg *msg;
1958
1959         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1960                    "seq_len=%lu key_len=%lu",
1961                    __func__, alg, addr, key_idx, set_tx,
1962                    (unsigned long) seq_len, (unsigned long) key_len);
1963
1964         msg = nlmsg_alloc();
1965         if (msg == NULL)
1966                 return -1;
1967
1968         if (alg == WPA_ALG_NONE) {
1969                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1970                             NL80211_CMD_DEL_KEY, 0);
1971         } else {
1972                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1973                             NL80211_CMD_NEW_KEY, 0);
1974                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1975                 switch (alg) {
1976                 case WPA_ALG_WEP:
1977                         if (key_len == 5)
1978                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1979                                             0x000FAC01);
1980                         else
1981                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1982                                             0x000FAC05);
1983                         break;
1984                 case WPA_ALG_TKIP:
1985                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1986                         break;
1987                 case WPA_ALG_CCMP:
1988                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1989                         break;
1990                 default:
1991                         nlmsg_free(msg);
1992                         return -1;
1993                 }
1994         }
1995
1996         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1997         {
1998                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1999                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2000         }
2001         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2002         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2003
2004         err = 0;
2005         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2006             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
2007                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
2008                 nlmsg_free(msg);
2009                 return -1;
2010         }
2011
2012         if (set_tx && alg != WPA_ALG_NONE) {
2013                 nlmsg_free(msg);
2014                 msg = nlmsg_alloc();
2015                 if (msg == NULL)
2016                         return -1;
2017
2018                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2019                             0, NL80211_CMD_SET_KEY, 0);
2020                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2021                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2022                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2023
2024                 err = 0;
2025                 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2026                     (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
2027                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
2028                                    "failed; err=%d", err);
2029                         nlmsg_free(msg);
2030                         return -1;
2031                 }
2032         }
2033
2034         ret = 0;
2035
2036 nla_put_failure:
2037         nlmsg_free(msg);
2038         return ret;
2039 }
2040
2041
2042 static int wpa_driver_nl80211_set_countermeasures(void *priv,
2043                                                int enabled)
2044 {
2045         struct wpa_driver_nl80211_data *drv = priv;
2046         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2047         return wpa_driver_nl80211_set_auth_param(drv,
2048                                               IW_AUTH_TKIP_COUNTERMEASURES,
2049                                               enabled);
2050 }
2051
2052
2053 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
2054                                                 int enabled)
2055 {
2056         struct wpa_driver_nl80211_data *drv = priv;
2057         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2058         drv->use_crypt = enabled;
2059         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2060                                               enabled);
2061 }
2062
2063
2064 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2065                                 const u8 *addr, int cmd, int reason_code)
2066 {
2067         struct iwreq iwr;
2068         struct iw_mlme mlme;
2069         int ret = 0;
2070
2071         os_memset(&iwr, 0, sizeof(iwr));
2072         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2073         os_memset(&mlme, 0, sizeof(mlme));
2074         mlme.cmd = cmd;
2075         mlme.reason_code = reason_code;
2076         mlme.addr.sa_family = ARPHRD_ETHER;
2077         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2078         iwr.u.data.pointer = (caddr_t) &mlme;
2079         iwr.u.data.length = sizeof(mlme);
2080
2081         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2082                 perror("ioctl[SIOCSIWMLME]");
2083                 ret = -1;
2084         }
2085
2086         return ret;
2087 }
2088
2089
2090 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2091                                           int reason_code)
2092 {
2093         struct wpa_driver_nl80211_data *drv = priv;
2094         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2095         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2096 }
2097
2098
2099 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2100                                         int reason_code)
2101 {
2102         struct wpa_driver_nl80211_data *drv = priv;
2103         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2104         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2105                                     reason_code);
2106 }
2107
2108
2109 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2110                                       size_t ie_len)
2111 {
2112         struct wpa_driver_nl80211_data *drv = priv;
2113         struct iwreq iwr;
2114         int ret = 0;
2115
2116         os_memset(&iwr, 0, sizeof(iwr));
2117         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2118         iwr.u.data.pointer = (caddr_t) ie;
2119         iwr.u.data.length = ie_len;
2120
2121         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2122                 perror("ioctl[SIOCSIWGENIE]");
2123                 ret = -1;
2124         }
2125
2126         return ret;
2127 }
2128
2129
2130 static int wpa_driver_nl80211_cipher2wext(int cipher)
2131 {
2132         switch (cipher) {
2133         case CIPHER_NONE:
2134                 return IW_AUTH_CIPHER_NONE;
2135         case CIPHER_WEP40:
2136                 return IW_AUTH_CIPHER_WEP40;
2137         case CIPHER_TKIP:
2138                 return IW_AUTH_CIPHER_TKIP;
2139         case CIPHER_CCMP:
2140                 return IW_AUTH_CIPHER_CCMP;
2141         case CIPHER_WEP104:
2142                 return IW_AUTH_CIPHER_WEP104;
2143         default:
2144                 return 0;
2145         }
2146 }
2147
2148
2149 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2150 {
2151         switch (keymgmt) {
2152         case KEY_MGMT_802_1X:
2153         case KEY_MGMT_802_1X_NO_WPA:
2154                 return IW_AUTH_KEY_MGMT_802_1X;
2155         case KEY_MGMT_PSK:
2156                 return IW_AUTH_KEY_MGMT_PSK;
2157         default:
2158                 return 0;
2159         }
2160 }
2161
2162
2163 static int
2164 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2165                                   struct wpa_driver_associate_params *params)
2166 {
2167         struct iwreq iwr;
2168         int ret = 0;
2169
2170         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2171                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2172
2173         os_memset(&iwr, 0, sizeof(iwr));
2174         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2175         /* Just changing mode, not actual keys */
2176         iwr.u.encoding.flags = 0;
2177         iwr.u.encoding.pointer = (caddr_t) NULL;
2178         iwr.u.encoding.length = 0;
2179
2180         /*
2181          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2182          * different things. Here they are used to indicate Open System vs.
2183          * Shared Key authentication algorithm. However, some drivers may use
2184          * them to select between open/restricted WEP encrypted (open = allow
2185          * both unencrypted and encrypted frames; restricted = only allow
2186          * encrypted frames).
2187          */
2188
2189         if (!drv->use_crypt) {
2190                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2191         } else {
2192                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2193                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2194                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2195                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2196         }
2197
2198         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2199                 perror("ioctl[SIOCSIWENCODE]");
2200                 ret = -1;
2201         }
2202
2203         return ret;
2204 }
2205
2206
2207 static int wpa_driver_nl80211_associate(
2208         void *priv, struct wpa_driver_associate_params *params)
2209 {
2210         struct wpa_driver_nl80211_data *drv = priv;
2211         int ret = 0;
2212         int allow_unencrypted_eapol;
2213         int value;
2214
2215         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2216
2217         /*
2218          * If the driver did not support SIOCSIWAUTH, fallback to
2219          * SIOCSIWENCODE here.
2220          */
2221         if (drv->auth_alg_fallback &&
2222             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2223                 ret = -1;
2224
2225         if (!params->bssid &&
2226             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2227                 ret = -1;
2228
2229         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2230          * from configuration, not from here, where only the selected suite is
2231          * available */
2232         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2233             < 0)
2234                 ret = -1;
2235         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2236                 value = IW_AUTH_WPA_VERSION_DISABLED;
2237         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2238                 value = IW_AUTH_WPA_VERSION_WPA2;
2239         else
2240                 value = IW_AUTH_WPA_VERSION_WPA;
2241         if (wpa_driver_nl80211_set_auth_param(drv,
2242                                            IW_AUTH_WPA_VERSION, value) < 0)
2243                 ret = -1;
2244         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2245         if (wpa_driver_nl80211_set_auth_param(drv,
2246                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2247                 ret = -1;
2248         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2249         if (wpa_driver_nl80211_set_auth_param(drv,
2250                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2251                 ret = -1;
2252         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2253         if (wpa_driver_nl80211_set_auth_param(drv,
2254                                            IW_AUTH_KEY_MGMT, value) < 0)
2255                 ret = -1;
2256         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2257                 params->pairwise_suite != CIPHER_NONE ||
2258                 params->group_suite != CIPHER_NONE ||
2259                 params->wpa_ie_len;
2260         if (wpa_driver_nl80211_set_auth_param(drv,
2261                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2262                 ret = -1;
2263
2264         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2265          * not using WPA. IEEE 802.1X specifies that these frames are not
2266          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2267         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2268             params->key_mgmt_suite == KEY_MGMT_PSK)
2269                 allow_unencrypted_eapol = 0;
2270         else
2271                 allow_unencrypted_eapol = 1;
2272
2273         if (wpa_driver_nl80211_set_auth_param(drv,
2274                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2275                                            allow_unencrypted_eapol) < 0)
2276                 ret = -1;
2277         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2278                 ret = -1;
2279         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2280                 ret = -1;
2281         if (params->bssid &&
2282             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2283                 ret = -1;
2284
2285         return ret;
2286 }
2287
2288
2289 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2290 {
2291         struct wpa_driver_nl80211_data *drv = priv;
2292         int algs = 0, res;
2293
2294         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2295                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2296         if (auth_alg & AUTH_ALG_SHARED_KEY)
2297                 algs |= IW_AUTH_ALG_SHARED_KEY;
2298         if (auth_alg & AUTH_ALG_LEAP)
2299                 algs |= IW_AUTH_ALG_LEAP;
2300         if (algs == 0) {
2301                 /* at least one algorithm should be set */
2302                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2303         }
2304
2305         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2306                                              algs);
2307         drv->auth_alg_fallback = res == -2;
2308         return res;
2309 }
2310
2311
2312 /**
2313  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2314  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2315  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2316  * Returns: 0 on success, -1 on failure
2317  */
2318 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2319 {
2320         struct wpa_driver_nl80211_data *drv = priv;
2321         int ret = -1, flags;
2322         struct nl_msg *msg;
2323
2324         msg = nlmsg_alloc();
2325         if (!msg)
2326                 return -1;
2327
2328         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2329                     0, NL80211_CMD_SET_INTERFACE, 0);
2330         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2331         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2332                     mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2333
2334         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2335             nl_wait_for_ack(drv->nl_handle) < 0)
2336                 goto try_again;
2337
2338         nlmsg_free(msg);
2339         return 0;
2340
2341 nla_put_failure:
2342         nlmsg_free(msg);
2343         return -1;
2344
2345 try_again:
2346         /* mac80211 doesn't allow mode changes while the device is up, so
2347          * take the device down, try to set the mode again, and bring the
2348          * device back up.
2349          */
2350         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2351                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2352
2353                 /* Try to set the mode again while the interface is down */
2354                 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2355                     nl_wait_for_ack(drv->nl_handle) < 0) {
2356                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2357                                    "mode", drv->ifname);
2358                 } else
2359                         ret = 0;
2360
2361                 /* Ignore return value of get_ifflags to ensure that the device
2362                  * is always up like it was before this function was called.
2363                  */
2364                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2365                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2366         }
2367
2368         nlmsg_free(msg);
2369         return ret;
2370 }
2371
2372
2373 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2374                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2375 {
2376         struct iwreq iwr;
2377         struct iw_pmksa pmksa;
2378         int ret = 0;
2379
2380         os_memset(&iwr, 0, sizeof(iwr));
2381         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2382         os_memset(&pmksa, 0, sizeof(pmksa));
2383         pmksa.cmd = cmd;
2384         pmksa.bssid.sa_family = ARPHRD_ETHER;
2385         if (bssid)
2386                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2387         if (pmkid)
2388                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2389         iwr.u.data.pointer = (caddr_t) &pmksa;
2390         iwr.u.data.length = sizeof(pmksa);
2391
2392         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2393                 if (errno != EOPNOTSUPP)
2394                         perror("ioctl[SIOCSIWPMKSA]");
2395                 ret = -1;
2396         }
2397
2398         return ret;
2399 }
2400
2401
2402 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2403                                      const u8 *pmkid)
2404 {
2405         struct wpa_driver_nl80211_data *drv = priv;
2406         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2407 }
2408
2409
2410 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2411                                         const u8 *pmkid)
2412 {
2413         struct wpa_driver_nl80211_data *drv = priv;
2414         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2415 }
2416
2417
2418 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2419 {
2420         struct wpa_driver_nl80211_data *drv = priv;
2421         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2422 }
2423
2424
2425 static int wpa_driver_nl80211_get_capa(void *priv,
2426                                        struct wpa_driver_capa *capa)
2427 {
2428         struct wpa_driver_nl80211_data *drv = priv;
2429         if (!drv->has_capability)
2430                 return -1;
2431         os_memcpy(capa, &drv->capa, sizeof(*capa));
2432         return 0;
2433 }
2434
2435
2436 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2437 {
2438         struct wpa_driver_nl80211_data *drv = priv;
2439
2440         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2441                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2442         drv->operstate = state;
2443         return wpa_driver_nl80211_send_oper_ifla(
2444                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2445 }
2446
2447
2448 #ifdef CONFIG_CLIENT_MLME
2449 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2450 {
2451         if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2452                 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2453                            "MLME");
2454                 return -1;
2455         }
2456         if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2457                 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2458                            "interface");
2459                 return -1;
2460         }
2461         return 0;
2462 }
2463 #endif /* CONFIG_CLIENT_MLME */
2464
2465
2466 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2467 {
2468 #ifdef CONFIG_CLIENT_MLME
2469         struct wpa_driver_nl80211_data *drv = priv;
2470
2471         if (param == NULL)
2472                 return 0;
2473
2474         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2475
2476         if (os_strstr(param, "use_mlme=1")) {
2477                 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2478                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2479
2480                 if (wpa_driver_nl80211_open_mlme(drv))
2481                         return -1;
2482         }
2483 #endif /* CONFIG_CLIENT_MLME */
2484
2485         return 0;
2486 }
2487
2488
2489 #ifdef CONFIG_CLIENT_MLME
2490
2491 static int ack_wait_handler(struct nl_msg *msg, void *arg)
2492 {
2493         int *finished = arg;
2494
2495         *finished = 1;
2496         return NL_STOP;
2497 }
2498
2499
2500 struct phy_info_arg {
2501         u16 *num_modes;
2502         struct wpa_hw_modes *modes;
2503         int error;
2504 };
2505
2506
2507 static int phy_info_handler(struct nl_msg *msg, void *arg)
2508 {
2509         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2510         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2511         struct phy_info_arg *phy_info = arg;
2512
2513         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2514
2515         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2516         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2517                 = {
2518                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2519                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2520                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2521                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2522                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2523         };
2524
2525         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2526         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2527                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2528                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2529                 { .type = NLA_FLAG },
2530         };
2531
2532         struct nlattr *nl_band;
2533         struct nlattr *nl_freq;
2534         struct nlattr *nl_rate;
2535         int rem_band, rem_freq, rem_rate;
2536         struct wpa_hw_modes *mode;
2537         int idx, mode_is_set;
2538
2539         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2540                   genlmsg_attrlen(gnlh, 0), NULL);
2541
2542         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2543                 return NL_SKIP;
2544
2545         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2546                             rem_band) {
2547                 mode = os_realloc(phy_info->modes,
2548                                   (*phy_info->num_modes + 1) * sizeof(*mode));
2549                 if (!mode)
2550                         return NL_SKIP;
2551                 phy_info->modes = mode;
2552
2553                 mode_is_set = 0;
2554
2555                 mode = &phy_info->modes[*(phy_info->num_modes)];
2556                 os_memset(mode, 0, sizeof(*mode));
2557                 *(phy_info->num_modes) += 1;
2558
2559                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2560                           nla_len(nl_band), NULL);
2561
2562                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2563                                     rem_freq) {
2564                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2565                                   nla_data(nl_freq), nla_len(nl_freq),
2566                                   freq_policy);
2567                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2568                                 continue;
2569                         mode->num_channels++;
2570                 }
2571
2572                 mode->channels = os_zalloc(mode->num_channels *
2573                                            sizeof(struct wpa_channel_data));
2574                 if (!mode->channels)
2575                         return NL_SKIP;
2576
2577                 idx = 0;
2578
2579                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2580                                     rem_freq) {
2581                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2582                                   nla_data(nl_freq), nla_len(nl_freq),
2583                                   freq_policy);
2584                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2585                                 continue;
2586
2587                         mode->channels[idx].freq = nla_get_u32(
2588                                 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2589                         mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2590                                 WPA_CHAN_W_ACTIVE_SCAN |
2591                                 WPA_CHAN_W_IBSS;
2592
2593                         if (!mode_is_set) {
2594                                 /* crude heuristic */
2595                                 if (mode->channels[idx].freq < 4000)
2596                                         mode->mode = WPA_MODE_IEEE80211B;
2597                                 else
2598                                         mode->mode = WPA_MODE_IEEE80211A;
2599                                 mode_is_set = 1;
2600                         }
2601
2602                         /* crude heuristic */
2603                         if (mode->channels[idx].freq < 4000) {
2604                                 if (mode->channels[idx].freq == 2848)
2605                                         mode->channels[idx].chan = 14;
2606                                 else
2607                                         mode->channels[idx].chan =
2608                                                 (mode->channels[idx].freq -
2609                                                  2407) / 5;
2610                         } else
2611                                 mode->channels[idx].chan =
2612                                         mode->channels[idx].freq / 5 - 1000;
2613
2614                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2615                                 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2616                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2617                                 mode->channels[idx].flag &=
2618                                         ~WPA_CHAN_W_ACTIVE_SCAN;
2619                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2620                                 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2621                         idx++;
2622                 }
2623
2624                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2625                                     rem_rate) {
2626                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2627                                   nla_data(nl_rate), nla_len(nl_rate),
2628                                   rate_policy);
2629                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2630                                 continue;
2631                         mode->num_rates++;
2632                 }
2633
2634                 mode->rates = os_zalloc(mode->num_rates *
2635                                         sizeof(struct wpa_rate_data));
2636                 if (!mode->rates)
2637                         return NL_SKIP;
2638
2639                 idx = 0;
2640
2641                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2642                                     rem_rate) {
2643                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2644                                   nla_data(nl_rate), nla_len(nl_rate),
2645                                   rate_policy);
2646                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2647                                 continue;
2648                         mode->rates[idx].rate = nla_get_u32(
2649                                 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2650
2651                         /* crude heuristic */
2652                         if (mode->mode == WPA_MODE_IEEE80211B &&
2653                             mode->rates[idx].rate > 200)
2654                                 mode->mode = WPA_MODE_IEEE80211G;
2655
2656                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2657                                 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2658
2659                         idx++;
2660                 }
2661         }
2662
2663         phy_info->error = 0;
2664
2665         return NL_SKIP;
2666 }
2667
2668
2669 static struct wpa_hw_modes *
2670 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2671 {
2672         struct wpa_driver_nl80211_data *drv = priv;
2673         struct nl_msg *msg;
2674         int err = -1;
2675         struct nl_cb *cb = NULL;
2676         int finished = 0;
2677         struct phy_info_arg result = {
2678                 .num_modes = num_modes,
2679                 .modes = NULL,
2680                 .error = 1,
2681         };
2682
2683         *num_modes = 0;
2684         *flags = 0;
2685
2686         msg = nlmsg_alloc();
2687         if (!msg)
2688                 return NULL;
2689
2690         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2691                     0, NL80211_CMD_GET_WIPHY, 0);
2692
2693         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2694
2695         cb = nl_cb_clone(drv->nl_cb);
2696         if (!cb)
2697                 goto out;
2698
2699         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
2700                 goto out;
2701
2702         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
2703         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
2704
2705         err = nl_recvmsgs(drv->nl_handle, cb);
2706
2707         if (!finished)
2708                 err = nl_wait_for_ack(drv->nl_handle);
2709
2710         if (err < 0 || result.error) {
2711                 wpa_supplicant_sta_free_hw_features(result.modes, *num_modes);
2712                 result.modes = NULL;
2713         }
2714
2715  out:
2716         nl_cb_put(cb);
2717  nla_put_failure:
2718         if (err)
2719                 fprintf(stderr, "failed to get information: %d\n", err);
2720         nlmsg_free(msg);
2721         return result.modes;
2722 }
2723
2724
2725 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2726                                           int chan, int freq)
2727 {
2728         return wpa_driver_nl80211_set_freq(priv, freq);
2729 }
2730
2731
2732 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2733                                         size_t data_len)
2734 {
2735         struct wpa_driver_nl80211_data *drv = priv;
2736         __u8 rtap_hdr[] = {
2737                 0x00, 0x00, /* radiotap version */
2738                 0x0e, 0x00, /* radiotap length */
2739                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2740                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
2741                 0x00,       /* padding */
2742                 0x00, 0x00, /* RX and TX flags to indicate that */
2743                 0x00, 0x00, /* this is the injected frame directly */
2744         };
2745         struct iovec iov[2] = {
2746                 {
2747                         .iov_base = &rtap_hdr,
2748                         .iov_len = sizeof(rtap_hdr),
2749                 },
2750                 {
2751                         .iov_base = (void *) data,
2752                         .iov_len = data_len,
2753                 }
2754         };
2755         struct msghdr msg = {
2756                 .msg_name = NULL,
2757                 .msg_namelen = 0,
2758                 .msg_iov = iov,
2759                 .msg_iovlen = 2,
2760                 .msg_control = NULL,
2761                 .msg_controllen = 0,
2762                 .msg_flags = 0,
2763         };
2764
2765         if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2766                 perror("send[MLME]");
2767                 return -1;
2768         }
2769
2770         return 0;
2771 }
2772
2773
2774 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2775                                            const u8 *supp_rates,
2776                                            size_t supp_rates_len)
2777 {
2778         struct wpa_driver_nl80211_data *drv = priv;
2779         struct nl_msg *msg;
2780         int ret = -1;
2781
2782         msg = nlmsg_alloc();
2783         if (!msg)
2784                 goto out;
2785
2786         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2787                     0, NL80211_CMD_NEW_STATION, 0);
2788
2789         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2790         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2791         /* TODO: Get proper Association ID and listen interval */
2792         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2793         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2794                 supp_rates);
2795         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2796
2797         ret = nl_send_auto_complete(drv->nl_handle, msg);
2798         if (ret < 0)
2799                 goto nla_put_failure;
2800
2801         ret = nl_wait_for_ack(drv->nl_handle);
2802         /* ignore EEXIST, this happens if a STA associates while associated */
2803         if (ret == -EEXIST || ret >= 0)
2804                 ret = 0;
2805
2806  nla_put_failure:
2807         nlmsg_free(msg);
2808
2809  out:
2810         return ret;
2811 }
2812
2813
2814 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2815 {
2816         struct wpa_driver_nl80211_data *drv = priv;
2817         struct nl_msg *msg;
2818         int ret = -1;
2819
2820         msg = nlmsg_alloc();
2821         if (!msg)
2822                 goto out;
2823
2824         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2825                     0, NL80211_CMD_DEL_STATION, 0);
2826
2827         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2828         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2829
2830         ret = 0;
2831
2832         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
2833             nl_wait_for_ack(drv->nl_handle) < 0) {
2834                 ret = -1;
2835         }
2836
2837  nla_put_failure:
2838         nlmsg_free(msg);
2839
2840  out:
2841         return ret;
2842 }
2843
2844 #endif /* CONFIG_CLIENT_MLME */
2845
2846
2847 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2848         .name = "nl80211",
2849         .desc = "Linux nl80211/cfg80211",
2850         .get_bssid = wpa_driver_nl80211_get_bssid,
2851         .get_ssid = wpa_driver_nl80211_get_ssid,
2852         .set_wpa = wpa_driver_nl80211_set_wpa,
2853         .set_key = wpa_driver_nl80211_set_key,
2854         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2855         .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2856         .scan = wpa_driver_nl80211_scan,
2857         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2858         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2859         .disassociate = wpa_driver_nl80211_disassociate,
2860         .set_mode = wpa_driver_nl80211_set_mode,
2861         .associate = wpa_driver_nl80211_associate,
2862         .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2863         .init = wpa_driver_nl80211_init,
2864         .deinit = wpa_driver_nl80211_deinit,
2865         .set_param = wpa_driver_nl80211_set_param,
2866         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2867         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2868         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2869         .get_capa = wpa_driver_nl80211_get_capa,
2870         .set_operstate = wpa_driver_nl80211_set_operstate,
2871 #ifdef CONFIG_CLIENT_MLME
2872         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2873         .set_channel = wpa_driver_nl80211_set_channel,
2874         .set_ssid = wpa_driver_nl80211_set_ssid,
2875         .set_bssid = wpa_driver_nl80211_set_bssid,
2876         .send_mlme = wpa_driver_nl80211_send_mlme,
2877         .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2878         .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2879 #endif /* CONFIG_CLIENT_MLME */
2880 };