src/drivers/driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, 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  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "driver.h"
  28 #include "eloop.h"
  29 #include "priv_netlink.h"
  30 #include "driver_wext.h"
  31 #include "ieee802_11_defs.h"
  32 #include "wpa_common.h"
  33
  34 #ifdef CONFIG_CLIENT_MLME
  35 #include <netpacket/packet.h>
  36 /* old definitions from net/mac80211 */
  37
  38 typedef u32 __bitwise __be32;
  39 typedef u64 __bitwise __be64;
  40
  41 #define PRISM2_IOCTL_PRISM2_PARAM (SIOCIWFIRSTPRIV + 0)
  42 #define PRISM2_IOCTL_GET_PRISM2_PARAM (SIOCIWFIRSTPRIV + 1)
  43 #define PRISM2_IOCTL_HOSTAPD (SIOCIWFIRSTPRIV + 3)
  44
  45 #define PRISM2_PARAM_USER_SPACE_MLME 1045
  46 #define PRISM2_PARAM_MGMT_IF            1046
  47 #define PRISM2_HOSTAPD_ADD_STA 2
  48 #define PRISM2_HOSTAPD_REMOVE_STA 3
  49 #define PRISM2_HOSTAPD_GET_HW_FEATURES  1002
  50 #define PRISM2_HOSTAPD_MAX_BUF_SIZE     2048
  51
  52 #ifndef ALIGNED
  53 #define ALIGNED __attribute__ ((aligned))
  54 #endif
  55
  56 struct prism2_hostapd_param {
  57         u32 cmd;
  58         u8 sta_addr[ETH_ALEN];
  59         u8 pad[2];
  60         union {
  61                 struct {
  62                         u16 aid;
  63                         u16 capability;
  64                         u8 supp_rates[32];
  65                         u8 wds_flags;
  66 #define IEEE80211_STA_DYNAMIC_ENC BIT(0)
  67                         u8 enc_flags;
  68                         u16 listen_interval;
  69                 } add_sta;
  70                 struct {
  71                         u16 num_modes;
  72                         u16 flags;
  73                         u8 data[0] ALIGNED; /* num_modes * feature data */
  74                 } hw_features;
  75                 struct {
  76                         u16 mode; /* MODE_* */
  77                         u16 num_supported_rates;
  78                         u16 num_basic_rates;
  79                         u8 data[0] ALIGNED; /* num_supported_rates * u16 +
  80                                              * num_basic_rates * u16 */
  81                 } set_rate_sets;
  82                 struct {
  83                         u16 mode; /* MODE_* */
  84                         u16 chan;
  85                         u32 flag;
  86                         u8 power_level; /* regulatory limit in dBm */
  87                         u8 antenna_max;
  88                 } set_channel_flag;
  89                 struct {
  90                         u32 rd;
  91                 } set_regulatory_domain;
  92                 struct {
  93                         u32 queue;
  94                         s32 aifs;
  95                         u32 cw_min;
  96                         u32 cw_max;
  97                         u32 burst_time; /* maximum burst time in 0.1 ms, i.e.,
  98                                          * 10 = 1 ms */
  99                 } tx_queue_params;
 100         } u;
 101 };
 102
 103 struct hostapd_ioctl_hw_modes_hdr {
 104         int mode;
 105         int num_channels;
 106         int num_rates;
 107 };
 108
 109 /*
 110  * frame format for the management interface that is slated
 111  * to be replaced by "cooked monitor" with radiotap
 112  */
 113 #define IEEE80211_FI_VERSION 0x80211001
 114 struct ieee80211_frame_info {
 115         __be32 version;
 116         __be32 length;
 117         __be64 mactime;
 118         __be64 hosttime;
 119         __be32 phytype;
 120         __be32 channel;
 121         __be32 datarate;
 122         __be32 antenna;
 123         __be32 priority;
 124         __be32 ssi_type;
 125         __be32 ssi_signal;
 126         __be32 ssi_noise;
 127         __be32 preamble;
 128         __be32 encoding;
 129
 130         /* Note: this structure is otherwise identical to capture format used
 131          * in linux-wlan-ng, but this additional field is used to provide meta
 132          * data about the frame to hostapd. This was the easiest method for
 133          * providing this information, but this might change in the future. */
 134         __be32 msg_type;
 135 } __attribute__ ((packed));
 136
 137 /* old mode definitions */
 138 enum {
 139         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
 140         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
 141         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
 142         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
 143         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
 144         NUM_IEEE80211_MODES = 5
 145 };
 146
 147 #ifndef ETH_P_ALL
 148 #define ETH_P_ALL 0x0003
 149 #endif
 150 #endif /* CONFIG_CLIENT_MLME */
 151
 152
 153
 154
 155 static int wpa_driver_wext_flush_pmkid(void *priv);
 156 static int wpa_driver_wext_get_range(void *priv);
 157 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
 158
 159
 160 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
 161                                           int linkmode, int operstate)
 162 {
 163         struct {
 164                 struct nlmsghdr hdr;
 165                 struct ifinfomsg ifinfo;
 166                 char opts[16];
 167         } req;
 168         struct rtattr *rta;
 169         static int nl_seq;
 170         ssize_t ret;
 171
 172         os_memset(&req, 0, sizeof(req));
 173
 174         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 175         req.hdr.nlmsg_type = RTM_SETLINK;
 176         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 177         req.hdr.nlmsg_seq = ++nl_seq;
 178         req.hdr.nlmsg_pid = 0;
 179
 180         req.ifinfo.ifi_family = AF_UNSPEC;
 181         req.ifinfo.ifi_type = 0;
 182         req.ifinfo.ifi_index = drv->ifindex;
 183         req.ifinfo.ifi_flags = 0;
 184         req.ifinfo.ifi_change = 0;
 185
 186         if (linkmode != -1) {
 187                 rta = (struct rtattr *)
 188                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 189                 rta->rta_type = IFLA_LINKMODE;
 190                 rta->rta_len = RTA_LENGTH(sizeof(char));
 191                 *((char *) RTA_DATA(rta)) = linkmode;
 192                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 193                         RTA_LENGTH(sizeof(char));
 194         }
 195         if (operstate != -1) {
 196                 rta = (struct rtattr *)
 197                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 198                 rta->rta_type = IFLA_OPERSTATE;
 199                 rta->rta_len = RTA_LENGTH(sizeof(char));
 200                 *((char *) RTA_DATA(rta)) = operstate;
 201                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 202                         RTA_LENGTH(sizeof(char));
 203         }
 204
 205         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 206                    linkmode, operstate);
 207
 208         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 209         if (ret < 0) {
 210                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 211                            "%s (assume operstate is not supported)",
 212                            strerror(errno));
 213         }
 214
 215         return ret < 0 ? -1 : 0;
 216 }
 217
 218
 219 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 220                                    int idx, u32 value)
 221 {
 222         struct iwreq iwr;
 223         int ret = 0;
 224
 225         os_memset(&iwr, 0, sizeof(iwr));
 226         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 227         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 228         iwr.u.param.value = value;
 229
 230         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 231                 if (errno != EOPNOTSUPP) {
 232                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 233                                    "value 0x%x) failed: %s)",
 234                                    idx, value, strerror(errno));
 235                 }
 236                 ret = errno == EOPNOTSUPP ? -2 : -1;
 237         }
 238
 239         return ret;
 240 }
 241
 242
 243 /**
 244  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 245  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 246  * @bssid: Buffer for BSSID
 247  * Returns: 0 on success, -1 on failure
 248  */
 249 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 250 {
 251         struct wpa_driver_wext_data *drv = priv;
 252         struct iwreq iwr;
 253         int ret = 0;
 254
 255         os_memset(&iwr, 0, sizeof(iwr));
 256         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 257
 258         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 259                 perror("ioctl[SIOCGIWAP]");
 260                 ret = -1;
 261         }
 262         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 263
 264         return ret;
 265 }
 266
 267
 268 /**
 269  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 270  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 271  * @bssid: BSSID
 272  * Returns: 0 on success, -1 on failure
 273  */
 274 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 275 {
 276         struct wpa_driver_wext_data *drv = priv;
 277         struct iwreq iwr;
 278         int ret = 0;
 279
 280         os_memset(&iwr, 0, sizeof(iwr));
 281         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 282         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 283         if (bssid)
 284                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 285         else
 286                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 287
 288         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 289                 perror("ioctl[SIOCSIWAP]");
 290                 ret = -1;
 291         }
 292
 293         return ret;
 294 }
 295
 296
 297 /**
 298  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 299  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 300  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 301  * Returns: SSID length on success, -1 on failure
 302  */
 303 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 304 {
 305         struct wpa_driver_wext_data *drv = priv;
 306         struct iwreq iwr;
 307         int ret = 0;
 308
 309         os_memset(&iwr, 0, sizeof(iwr));
 310         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 311         iwr.u.essid.pointer = (caddr_t) ssid;
 312         iwr.u.essid.length = 32;
 313
 314         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 315                 perror("ioctl[SIOCGIWESSID]");
 316                 ret = -1;
 317         } else {
 318                 ret = iwr.u.essid.length;
 319                 if (ret > 32)
 320                         ret = 32;
 321                 /* Some drivers include nul termination in the SSID, so let's
 322                  * remove it here before further processing. WE-21 changes this
 323                  * to explicitly require the length _not_ to include nul
 324                  * termination. */
 325                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 326                     drv->we_version_compiled < 21)
 327                         ret--;
 328         }
 329
 330         return ret;
 331 }
 332
 333
 334 /**
 335  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 336  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 337  * @ssid: SSID
 338  * @ssid_len: Length of SSID (0..32)
 339  * Returns: 0 on success, -1 on failure
 340  */
 341 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 342 {
 343         struct wpa_driver_wext_data *drv = priv;
 344         struct iwreq iwr;
 345         int ret = 0;
 346         char buf[33];
 347
 348         if (ssid_len > 32)
 349                 return -1;
 350
 351         os_memset(&iwr, 0, sizeof(iwr));
 352         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 353         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 354         iwr.u.essid.flags = (ssid_len != 0);
 355         os_memset(buf, 0, sizeof(buf));
 356         os_memcpy(buf, ssid, ssid_len);
 357         iwr.u.essid.pointer = (caddr_t) buf;
 358         if (drv->we_version_compiled < 21) {
 359                 /* For historic reasons, set SSID length to include one extra
 360                  * character, C string nul termination, even though SSID is
 361                  * really an octet string that should not be presented as a C
 362                  * string. Some Linux drivers decrement the length by one and
 363                  * can thus end up missing the last octet of the SSID if the
 364                  * length is not incremented here. WE-21 changes this to
 365                  * explicitly require the length _not_ to include nul
 366                  * termination. */
 367                 if (ssid_len)
 368                         ssid_len++;
 369         }
 370         iwr.u.essid.length = ssid_len;
 371
 372         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 373                 perror("ioctl[SIOCSIWESSID]");
 374                 ret = -1;
 375         }
 376
 377         return ret;
 378 }
 379
 380
 381 /**
 382  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 383  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 384  * @freq: Frequency in MHz
 385  * Returns: 0 on success, -1 on failure
 386  */
 387 int wpa_driver_wext_set_freq(void *priv, int freq)
 388 {
 389         struct wpa_driver_wext_data *drv = priv;
 390         struct iwreq iwr;
 391         int ret = 0;
 392
 393         os_memset(&iwr, 0, sizeof(iwr));
 394         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 395         iwr.u.freq.m = freq * 100000;
 396         iwr.u.freq.e = 1;
 397
 398         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 399                 perror("ioctl[SIOCSIWFREQ]");
 400                 ret = -1;
 401         }
 402
 403         return ret;
 404 }
 405
 406
 407 static void
 408 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 409 {
 410         union wpa_event_data data;
 411
 412         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 413                    custom);
 414
 415         os_memset(&data, 0, sizeof(data));
 416         /* Host AP driver */
 417         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 418                 data.michael_mic_failure.unicast =
 419                         os_strstr(custom, " unicast ") != NULL;
 420                 /* TODO: parse parameters(?) */
 421                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 422         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 423                 char *spos;
 424                 int bytes;
 425
 426                 spos = custom + 17;
 427
 428                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 429                 if (!bytes || (bytes & 1))
 430                         return;
 431                 bytes /= 2;
 432
 433                 data.assoc_info.req_ies = os_malloc(bytes);
 434                 if (data.assoc_info.req_ies == NULL)
 435                         return;
 436
 437                 data.assoc_info.req_ies_len = bytes;
 438                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 439
 440                 spos += bytes * 2;
 441
 442                 data.assoc_info.resp_ies = NULL;
 443                 data.assoc_info.resp_ies_len = 0;
 444
 445                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 446                         spos += 9;
 447
 448                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 449                         if (!bytes || (bytes & 1))
 450                                 goto done;
 451                         bytes /= 2;
 452
 453                         data.assoc_info.resp_ies = os_malloc(bytes);
 454                         if (data.assoc_info.resp_ies == NULL)
 455                                 goto done;
 456
 457                         data.assoc_info.resp_ies_len = bytes;
 458                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 459                 }
 460
 461                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 462
 463         done:
 464                 os_free(data.assoc_info.resp_ies);
 465                 os_free(data.assoc_info.req_ies);
 466 #ifdef CONFIG_PEERKEY
 467         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 468                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 469                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 470                                    "STKSTART.request '%s'", custom + 17);
 471                         return;
 472                 }
 473                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 474 #endif /* CONFIG_PEERKEY */
 475         }
 476 }
 477
 478
 479 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 480         void *ctx, const char *ev, size_t len)
 481 {
 482         const struct iw_michaelmicfailure *mic;
 483         union wpa_event_data data;
 484
 485         if (len < sizeof(*mic))
 486                 return -1;
 487
 488         mic = (const struct iw_michaelmicfailure *) ev;
 489
 490         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 491                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 492                    MAC2STR(mic->src_addr.sa_data));
 493
 494         os_memset(&data, 0, sizeof(data));
 495         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 496         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 497
 498         return 0;
 499 }
 500
 501
 502 static int wpa_driver_wext_event_wireless_pmkidcand(
 503         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 504 {
 505         const struct iw_pmkid_cand *cand;
 506         union wpa_event_data data;
 507         const u8 *addr;
 508
 509         if (len < sizeof(*cand))
 510                 return -1;
 511
 512         cand = (const struct iw_pmkid_cand *) ev;
 513         addr = (const u8 *) cand->bssid.sa_data;
 514
 515         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 516                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 517                    cand->index, MAC2STR(addr));
 518
 519         os_memset(&data, 0, sizeof(data));
 520         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 521         data.pmkid_candidate.index = cand->index;
 522         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 523         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 524
 525         return 0;
 526 }
 527
 528
 529 static int wpa_driver_wext_event_wireless_assocreqie(
 530         struct wpa_driver_wext_data *drv, const char *ev, int len)
 531 {
 532         if (len < 0)
 533                 return -1;
 534
 535         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 536                     len);
 537         os_free(drv->assoc_req_ies);
 538         drv->assoc_req_ies = os_malloc(len);
 539         if (drv->assoc_req_ies == NULL) {
 540                 drv->assoc_req_ies_len = 0;
 541                 return -1;
 542         }
 543         os_memcpy(drv->assoc_req_ies, ev, len);
 544         drv->assoc_req_ies_len = len;
 545
 546         return 0;
 547 }
 548
 549
 550 static int wpa_driver_wext_event_wireless_assocrespie(
 551         struct wpa_driver_wext_data *drv, const char *ev, int len)
 552 {
 553         if (len < 0)
 554                 return -1;
 555
 556         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 557                     len);
 558         os_free(drv->assoc_resp_ies);
 559         drv->assoc_resp_ies = os_malloc(len);
 560         if (drv->assoc_resp_ies == NULL) {
 561                 drv->assoc_resp_ies_len = 0;
 562                 return -1;
 563         }
 564         os_memcpy(drv->assoc_resp_ies, ev, len);
 565         drv->assoc_resp_ies_len = len;
 566
 567         return 0;
 568 }
 569
 570
 571 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 572 {
 573         union wpa_event_data data;
 574
 575         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 576                 return;
 577
 578         os_memset(&data, 0, sizeof(data));
 579         if (drv->assoc_req_ies) {
 580                 data.assoc_info.req_ies = drv->assoc_req_ies;
 581                 drv->assoc_req_ies = NULL;
 582                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 583         }
 584         if (drv->assoc_resp_ies) {
 585                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 586                 drv->assoc_resp_ies = NULL;
 587                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 588         }
 589
 590         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 591
 592         os_free(data.assoc_info.req_ies);
 593         os_free(data.assoc_info.resp_ies);
 594 }
 595
 596
 597 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 598                                            void *ctx, char *data, int len)
 599 {
 600         struct iw_event iwe_buf, *iwe = &iwe_buf;
 601         char *pos, *end, *custom, *buf;
 602
 603         pos = data;
 604         end = data + len;
 605
 606         while (pos + IW_EV_LCP_LEN <= end) {
 607                 /* Event data may be unaligned, so make a local, aligned copy
 608                  * before processing. */
 609                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 610                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 611                            iwe->cmd, iwe->len);
 612                 if (iwe->len <= IW_EV_LCP_LEN)
 613                         return;
 614
 615                 custom = pos + IW_EV_POINT_LEN;
 616                 if (drv->we_version_compiled > 18 &&
 617                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 618                      iwe->cmd == IWEVCUSTOM ||
 619                      iwe->cmd == IWEVASSOCREQIE ||
 620                      iwe->cmd == IWEVASSOCRESPIE ||
 621                      iwe->cmd == IWEVPMKIDCAND)) {
 622                         /* WE-19 removed the pointer from struct iw_point */
 623                         char *dpos = (char *) &iwe_buf.u.data.length;
 624                         int dlen = dpos - (char *) &iwe_buf;
 625                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 626                                   sizeof(struct iw_event) - dlen);
 627                 } else {
 628                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 629                         custom += IW_EV_POINT_OFF;
 630                 }
 631
 632                 switch (iwe->cmd) {
 633                 case SIOCGIWAP:
 634                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 635                                    MACSTR,
 636                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 637                         if (is_zero_ether_addr(
 638                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 639                             os_memcmp(iwe->u.ap_addr.sa_data,
 640                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 641                             0) {
 642                                 os_free(drv->assoc_req_ies);
 643                                 drv->assoc_req_ies = NULL;
 644                                 os_free(drv->assoc_resp_ies);
 645                                 drv->assoc_resp_ies = NULL;
 646                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 647                                                      NULL);
 648
 649                         } else {
 650                                 wpa_driver_wext_event_assoc_ies(drv);
 651                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 652                         }
 653                         break;
 654                 case IWEVMICHAELMICFAILURE:
 655                         wpa_driver_wext_event_wireless_michaelmicfailure(
 656                                 ctx, custom, iwe->u.data.length);
 657                         break;
 658                 case IWEVCUSTOM:
 659                         if (custom + iwe->u.data.length > end)
 660                                 return;
 661                         buf = os_malloc(iwe->u.data.length + 1);
 662                         if (buf == NULL)
 663                                 return;
 664                         os_memcpy(buf, custom, iwe->u.data.length);
 665                         buf[iwe->u.data.length] = '\0';
 666                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 667                         os_free(buf);
 668                         break;
 669                 case SIOCGIWSCAN:
 670                         drv->scan_complete_events = 1;
 671                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 672                                              drv, ctx);
 673                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 674                         break;
 675                 case IWEVASSOCREQIE:
 676                         wpa_driver_wext_event_wireless_assocreqie(
 677                                 drv, custom, iwe->u.data.length);
 678                         break;
 679                 case IWEVASSOCRESPIE:
 680                         wpa_driver_wext_event_wireless_assocrespie(
 681                                 drv, custom, iwe->u.data.length);
 682                         break;
 683                 case IWEVPMKIDCAND:
 684                         wpa_driver_wext_event_wireless_pmkidcand(
 685                                 drv, custom, iwe->u.data.length);
 686                         break;
 687                 }
 688
 689                 pos += iwe->len;
 690         }
 691 }
 692
 693
 694 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 695                                        void *ctx, char *buf, size_t len,
 696                                        int del)
 697 {
 698         union wpa_event_data event;
 699
 700         os_memset(&event, 0, sizeof(event));
 701         if (len > sizeof(event.interface_status.ifname))
 702                 len = sizeof(event.interface_status.ifname) - 1;
 703         os_memcpy(event.interface_status.ifname, buf, len);
 704         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 705                 EVENT_INTERFACE_ADDED;
 706
 707         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 708                    del ? "DEL" : "NEW",
 709                    event.interface_status.ifname,
 710                    del ? "removed" : "added");
 711
 712         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 713                 if (del)
 714                         drv->if_removed = 1;
 715                 else
 716                         drv->if_removed = 0;
 717         }
 718
 719         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 720 }
 721
 722
 723 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 724                                       struct nlmsghdr *h)
 725 {
 726         struct ifinfomsg *ifi;
 727         int attrlen, nlmsg_len, rta_len;
 728         struct rtattr *attr;
 729
 730         ifi = NLMSG_DATA(h);
 731
 732         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 733
 734         attrlen = h->nlmsg_len - nlmsg_len;
 735         if (attrlen < 0)
 736                 return 0;
 737
 738         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 739
 740         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 741         while (RTA_OK(attr, attrlen)) {
 742                 if (attr->rta_type == IFLA_IFNAME) {
 743                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 744                             == 0)
 745                                 return 1;
 746                         else
 747                                 break;
 748                 }
 749                 attr = RTA_NEXT(attr, attrlen);
 750         }
 751
 752         return 0;
 753 }
 754
 755
 756 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 757                                        int ifindex, struct nlmsghdr *h)
 758 {
 759         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 760                 return 1;
 761
 762         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 763                 drv->ifindex = if_nametoindex(drv->ifname);
 764                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 765                            "interface");
 766                 wpa_driver_wext_finish_drv_init(drv);
 767                 return 1;
 768         }
 769
 770         return 0;
 771 }
 772
 773
 774 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 775                                               void *ctx, struct nlmsghdr *h,
 776                                               size_t len)
 777 {
 778         struct ifinfomsg *ifi;
 779         int attrlen, nlmsg_len, rta_len;
 780         struct rtattr * attr;
 781
 782         if (len < sizeof(*ifi))
 783                 return;
 784
 785         ifi = NLMSG_DATA(h);
 786
 787         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 788                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 789                            ifi->ifi_index);
 790                 return;
 791         }
 792
 793         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 794                    "(%s%s%s%s)",
 795                    drv->operstate, ifi->ifi_flags,
 796                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 797                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 798                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 799                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 800         /*
 801          * Some drivers send the association event before the operup event--in
 802          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 803          * fails. This will hit us when wpa_supplicant does not need to do
 804          * IEEE 802.1X authentication
 805          */
 806         if (drv->operstate == 1 &&
 807             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 808             !(ifi->ifi_flags & IFF_RUNNING))
 809                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 810
 811         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 812
 813         attrlen = h->nlmsg_len - nlmsg_len;
 814         if (attrlen < 0)
 815                 return;
 816
 817         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 818
 819         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 820         while (RTA_OK(attr, attrlen)) {
 821                 if (attr->rta_type == IFLA_WIRELESS) {
 822                         wpa_driver_wext_event_wireless(
 823                                 drv, ctx, ((char *) attr) + rta_len,
 824                                 attr->rta_len - rta_len);
 825                 } else if (attr->rta_type == IFLA_IFNAME) {
 826                         wpa_driver_wext_event_link(drv, ctx,
 827                                                    ((char *) attr) + rta_len,
 828                                                    attr->rta_len - rta_len, 0);
 829                 }
 830                 attr = RTA_NEXT(attr, attrlen);
 831         }
 832 }
 833
 834
 835 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 836                                               void *ctx, struct nlmsghdr *h,
 837                                               size_t len)
 838 {
 839         struct ifinfomsg *ifi;
 840         int attrlen, nlmsg_len, rta_len;
 841         struct rtattr * attr;
 842
 843         if (len < sizeof(*ifi))
 844                 return;
 845
 846         ifi = NLMSG_DATA(h);
 847
 848         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 849
 850         attrlen = h->nlmsg_len - nlmsg_len;
 851         if (attrlen < 0)
 852                 return;
 853
 854         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 855
 856         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 857         while (RTA_OK(attr, attrlen)) {
 858                 if (attr->rta_type == IFLA_IFNAME) {
 859                         wpa_driver_wext_event_link(drv,  ctx,
 860                                                    ((char *) attr) + rta_len,
 861                                                    attr->rta_len - rta_len, 1);
 862                 }
 863                 attr = RTA_NEXT(attr, attrlen);
 864         }
 865 }
 866
 867
 868 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 869                                           void *sock_ctx)
 870 {
 871         char buf[8192];
 872         int left;
 873         struct sockaddr_nl from;
 874         socklen_t fromlen;
 875         struct nlmsghdr *h;
 876         int max_events = 10;
 877
 878 try_again:
 879         fromlen = sizeof(from);
 880         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 881                         (struct sockaddr *) &from, &fromlen);
 882         if (left < 0) {
 883                 if (errno != EINTR && errno != EAGAIN)
 884                         perror("recvfrom(netlink)");
 885                 return;
 886         }
 887
 888         h = (struct nlmsghdr *) buf;
 889         while (left >= (int) sizeof(*h)) {
 890                 int len, plen;
 891
 892                 len = h->nlmsg_len;
 893                 plen = len - sizeof(*h);
 894                 if (len > left || plen < 0) {
 895                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 896                                    "len=%d left=%d plen=%d",
 897                                    len, left, plen);
 898                         break;
 899                 }
 900
 901                 switch (h->nlmsg_type) {
 902                 case RTM_NEWLINK:
 903                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 904                                                           h, plen);
 905                         break;
 906                 case RTM_DELLINK:
 907                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 908                                                           h, plen);
 909                         break;
 910                 }
 911
 912                 len = NLMSG_ALIGN(len);
 913                 left -= len;
 914                 h = (struct nlmsghdr *) ((char *) h + len);
 915         }
 916
 917         if (left > 0) {
 918                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 919                            "message", left);
 920         }
 921
 922         if (--max_events > 0) {
 923                 /*
 924                  * Try to receive all events in one eloop call in order to
 925                  * limit race condition on cases where AssocInfo event, Assoc
 926                  * event, and EAPOL frames are received more or less at the
 927                  * same time. We want to process the event messages first
 928                  * before starting EAPOL processing.
 929                  */
 930                 goto try_again;
 931         }
 932 }
 933
 934
 935 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 936                                               const char *ifname, int *flags)
 937 {
 938         struct ifreq ifr;
 939
 940         os_memset(&ifr, 0, sizeof(ifr));
 941         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 942         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 943                 perror("ioctl[SIOCGIFFLAGS]");
 944                 return -1;
 945         }
 946         *flags = ifr.ifr_flags & 0xffff;
 947         return 0;
 948 }
 949
 950
 951 /**
 952  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 953  * @drv: driver_wext private data
 954  * @flags: Pointer to returned flags value
 955  * Returns: 0 on success, -1 on failure
 956  */
 957 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 958 {
 959         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 960 }
 961
 962
 963 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 964                                               const char *ifname, int flags)
 965 {
 966         struct ifreq ifr;
 967
 968         os_memset(&ifr, 0, sizeof(ifr));
 969         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 970         ifr.ifr_flags = flags & 0xffff;
 971         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 972                 perror("SIOCSIFFLAGS");
 973                 return -1;
 974         }
 975         return 0;
 976 }
 977
 978
 979 #ifdef CONFIG_CLIENT_MLME
 980
 981 static int wpa_driver_prism2_param_set(struct wpa_driver_wext_data *drv,
 982                                        int param, int value)
 983 {
 984         struct iwreq iwr;
 985         int *i;
 986
 987         os_memset(&iwr, 0, sizeof(iwr));
 988         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 989         i = (int *) iwr.u.name;
 990         *i++ = param;
 991         *i++ = value;
 992
 993         return ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr);
 994 }
 995
 996
 997 static int wpa_driver_prism2_param_get(struct wpa_driver_wext_data *drv,
 998                                        int param)
 999 {
1000         struct iwreq iwr;
1001         int *i;
1002
1003         os_memset(&iwr, 0, sizeof(iwr));
1004         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1005         i = (int *) iwr.u.name;
1006         *i = param;
1007
1008         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_GET_PRISM2_PARAM, &iwr) < 0) {
1009                 perror("ioctl[PRISM2_IOCTL_GET_PRISM2_PARAM]");
1010                 return -1;
1011         }
1012
1013         return *i;
1014 }
1015
1016 #endif /* CONFIG_CLIENT_MLME */
1017
1018
1019 /**
1020  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1021  * @drv: driver_wext private data
1022  * @flags: New value for flags
1023  * Returns: 0 on success, -1 on failure
1024  */
1025 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
1026 {
1027         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
1028 }
1029
1030
1031 /**
1032  * wpa_driver_wext_init - Initialize WE driver interface
1033  * @ctx: context to be used when calling wpa_supplicant functions,
1034  * e.g., wpa_supplicant_event()
1035  * @ifname: interface name, e.g., wlan0
1036  * Returns: Pointer to private data, %NULL on failure
1037  */
1038 void * wpa_driver_wext_init(void *ctx, const char *ifname)
1039 {
1040         int s;
1041         struct sockaddr_nl local;
1042         struct wpa_driver_wext_data *drv;
1043
1044         drv = os_zalloc(sizeof(*drv));
1045         if (drv == NULL)
1046                 return NULL;
1047         drv->ctx = ctx;
1048         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1049
1050         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1051         if (drv->ioctl_sock < 0) {
1052                 perror("socket(PF_INET,SOCK_DGRAM)");
1053                 os_free(drv);
1054                 return NULL;
1055         }
1056
1057         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1058         if (s < 0) {
1059                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1060                 close(drv->ioctl_sock);
1061                 os_free(drv);
1062                 return NULL;
1063         }
1064
1065         os_memset(&local, 0, sizeof(local));
1066         local.nl_family = AF_NETLINK;
1067         local.nl_groups = RTMGRP_LINK;
1068         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1069                 perror("bind(netlink)");
1070                 close(s);
1071                 close(drv->ioctl_sock);
1072                 os_free(drv);
1073                 return NULL;
1074         }
1075
1076         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
1077         drv->event_sock = s;
1078
1079         drv->mlme_sock = -1;
1080
1081         wpa_driver_wext_finish_drv_init(drv);
1082
1083         return drv;
1084 }
1085
1086
1087 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
1088 {
1089         int flags;
1090
1091         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
1092                 printf("Could not get interface '%s' flags\n", drv->ifname);
1093         else if (!(flags & IFF_UP)) {
1094                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1095                         printf("Could not set interface '%s' UP\n",
1096                                drv->ifname);
1097                 } else {
1098                         /*
1099                          * Wait some time to allow driver to initialize before
1100                          * starting configuring the driver. This seems to be
1101                          * needed at least some drivers that load firmware etc.
1102                          * when the interface is set up.
1103                          */
1104                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1105                                    "a second for the driver to complete "
1106                                    "initialization", drv->ifname);
1107                         sleep(1);
1108                 }
1109         }
1110
1111         /*
1112          * Make sure that the driver does not have any obsolete PMKID entries.
1113          */
1114         wpa_driver_wext_flush_pmkid(drv);
1115
1116         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1117                 printf("Could not configure driver to use managed mode\n");
1118         }
1119
1120         wpa_driver_wext_get_range(drv);
1121
1122         drv->ifindex = if_nametoindex(drv->ifname);
1123
1124         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
1125                 /*
1126                  * Host AP driver may use both wlan# and wifi# interface in
1127                  * wireless events. Since some of the versions included WE-18
1128                  * support, let's add the alternative ifindex also from
1129                  * driver_wext.c for the time being. This may be removed at
1130                  * some point once it is believed that old versions of the
1131                  * driver are not in use anymore.
1132                  */
1133                 char ifname2[IFNAMSIZ + 1];
1134                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
1135                 os_memcpy(ifname2, "wifi", 4);
1136                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1137         }
1138
1139         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1140 }
1141
1142
1143 /**
1144  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1145  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1146  *
1147  * Shut down driver interface and processing of driver events. Free
1148  * private data buffer if one was allocated in wpa_driver_wext_init().
1149  */
1150 void wpa_driver_wext_deinit(void *priv)
1151 {
1152         struct wpa_driver_wext_data *drv = priv;
1153         int flags;
1154
1155         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1156
1157         /*
1158          * Clear possibly configured driver parameters in order to make it
1159          * easier to use the driver after wpa_supplicant has been terminated.
1160          */
1161         (void) wpa_driver_wext_set_bssid(drv,
1162                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1163
1164         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1165
1166         eloop_unregister_read_sock(drv->event_sock);
1167         if (drv->mlme_sock >= 0)
1168                 eloop_unregister_read_sock(drv->mlme_sock);
1169
1170         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1171                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1172
1173 #ifdef CONFIG_CLIENT_MLME
1174         if (drv->mlmedev[0]) {
1175                 if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev,
1176                                                        &flags) == 0)
1177                         (void) wpa_driver_wext_set_ifflags_ifname(
1178                                 drv, drv->mlmedev, flags & ~IFF_UP);
1179                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 0);
1180                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME,
1181                                             0);
1182         }
1183 #endif /* CONFIG_CLIENT_MLME */
1184
1185         close(drv->event_sock);
1186         close(drv->ioctl_sock);
1187         if (drv->mlme_sock >= 0)
1188                 close(drv->mlme_sock);
1189         os_free(drv->assoc_req_ies);
1190         os_free(drv->assoc_resp_ies);
1191         os_free(drv);
1192 }
1193
1194
1195 /**
1196  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1197  * @eloop_ctx: Unused
1198  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1199  *
1200  * This function can be used as registered timeout when starting a scan to
1201  * generate a scan completed event if the driver does not report this.
1202  */
1203 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1204 {
1205         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1206         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1207 }
1208
1209
1210 /**
1211  * wpa_driver_wext_scan - Request the driver to initiate scan
1212  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1213  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1214  *      all SSIDs (either active scan with broadcast SSID or passive
1215  *      scan
1216  * @ssid_len: Length of the SSID
1217  * Returns: 0 on success, -1 on failure
1218  */
1219 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1220 {
1221         struct wpa_driver_wext_data *drv = priv;
1222         struct iwreq iwr;
1223         int ret = 0, timeout;
1224         struct iw_scan_req req;
1225
1226         if (ssid_len > IW_ESSID_MAX_SIZE) {
1227                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1228                            __FUNCTION__, (unsigned long) ssid_len);
1229                 return -1;
1230         }
1231
1232         os_memset(&iwr, 0, sizeof(iwr));
1233         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1234
1235         if (ssid && ssid_len) {
1236                 os_memset(&req, 0, sizeof(req));
1237                 req.essid_len = ssid_len;
1238                 req.bssid.sa_family = ARPHRD_ETHER;
1239                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1240                 os_memcpy(req.essid, ssid, ssid_len);
1241                 iwr.u.data.pointer = (caddr_t) &req;
1242                 iwr.u.data.length = sizeof(req);
1243                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1244         }
1245
1246         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1247                 perror("ioctl[SIOCSIWSCAN]");
1248                 ret = -1;
1249         }
1250
1251         /* Not all drivers generate "scan completed" wireless event, so try to
1252          * read results after a timeout. */
1253         timeout = 5;
1254         if (drv->scan_complete_events) {
1255                 /*
1256                  * The driver seems to deliver SIOCGIWSCAN events to notify
1257                  * when scan is complete, so use longer timeout to avoid race
1258                  * conditions with scanning and following association request.
1259                  */
1260                 timeout = 30;
1261         }
1262         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1263                    "seconds", ret, timeout);
1264         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1265         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1266                                drv->ctx);
1267
1268         return ret;
1269 }
1270
1271
1272 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1273                                     size_t *len)
1274 {
1275         struct iwreq iwr;
1276         u8 *res_buf;
1277         size_t res_buf_len;
1278
1279         res_buf_len = IW_SCAN_MAX_DATA;
1280         for (;;) {
1281                 res_buf = os_malloc(res_buf_len);
1282                 if (res_buf == NULL)
1283                         return NULL;
1284                 os_memset(&iwr, 0, sizeof(iwr));
1285                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1286                 iwr.u.data.pointer = res_buf;
1287                 iwr.u.data.length = res_buf_len;
1288
1289                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1290                         break;
1291
1292                 if (errno == E2BIG && res_buf_len < 100000) {
1293                         os_free(res_buf);
1294                         res_buf = NULL;
1295                         res_buf_len *= 2;
1296                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1297                                    "trying larger buffer (%lu bytes)",
1298                                    (unsigned long) res_buf_len);
1299                 } else {
1300                         perror("ioctl[SIOCGIWSCAN]");
1301                         os_free(res_buf);
1302                         return NULL;
1303                 }
1304         }
1305
1306         if (iwr.u.data.length > res_buf_len) {
1307                 os_free(res_buf);
1308                 return NULL;
1309         }
1310         *len = iwr.u.data.length;
1311
1312         return res_buf;
1313 }
1314
1315
1316 /*
1317  * Data structure for collecting WEXT scan results. This is needed to allow
1318  * the various methods of reporting IEs to be combined into a single IE buffer.
1319  */
1320 struct wext_scan_data {
1321         struct wpa_scan_res res;
1322         u8 *ie;
1323         size_t ie_len;
1324         u8 ssid[32];
1325         size_t ssid_len;
1326         int maxrate;
1327 };
1328
1329
1330 static void wext_get_scan_mode(struct iw_event *iwe,
1331                                struct wext_scan_data *res)
1332 {
1333         if (iwe->u.mode == IW_MODE_ADHOC)
1334                 res->res.caps |= IEEE80211_CAP_IBSS;
1335         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1336                 res->res.caps |= IEEE80211_CAP_ESS;
1337 }
1338
1339
1340 static void wext_get_scan_ssid(struct iw_event *iwe,
1341                                struct wext_scan_data *res, char *custom,
1342                                char *end)
1343 {
1344         int ssid_len = iwe->u.essid.length;
1345         if (custom + ssid_len > end)
1346                 return;
1347         if (iwe->u.essid.flags &&
1348             ssid_len > 0 &&
1349             ssid_len <= IW_ESSID_MAX_SIZE) {
1350                 os_memcpy(res->ssid, custom, ssid_len);
1351                 res->ssid_len = ssid_len;
1352         }
1353 }
1354
1355
1356 static void wext_get_scan_freq(struct iw_event *iwe,
1357                                struct wext_scan_data *res)
1358 {
1359         int divi = 1000000, i;
1360
1361         if (iwe->u.freq.e == 0) {
1362                 /*
1363                  * Some drivers do not report frequency, but a channel.
1364                  * Try to map this to frequency by assuming they are using
1365                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1366                  * frequency if the driver sends both frequency and channel,
1367                  * since the driver may be sending an A-band channel that we
1368                  * don't handle here.
1369                  */
1370
1371                 if (res->res.freq)
1372                         return;
1373
1374                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1375                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1376                         return;
1377                 } else if (iwe->u.freq.m == 14) {
1378                         res->res.freq = 2484;
1379                         return;
1380                 }
1381         }
1382
1383         if (iwe->u.freq.e > 6) {
1384                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1385                            MACSTR " m=%d e=%d)",
1386                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1387                            iwe->u.freq.e);
1388                 return;
1389         }
1390
1391         for (i = 0; i < iwe->u.freq.e; i++)
1392                 divi /= 10;
1393         res->res.freq = iwe->u.freq.m / divi;
1394 }
1395
1396
1397 static void wext_get_scan_qual(struct iw_event *iwe,
1398                                struct wext_scan_data *res)
1399 {
1400         res->res.qual = iwe->u.qual.qual;
1401         res->res.noise = iwe->u.qual.noise;
1402         res->res.level = iwe->u.qual.level;
1403 }
1404
1405
1406 static void wext_get_scan_encode(struct iw_event *iwe,
1407                                  struct wext_scan_data *res)
1408 {
1409         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1410                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1411 }
1412
1413
1414 static void wext_get_scan_rate(struct iw_event *iwe,
1415                                struct wext_scan_data *res, char *pos,
1416                                char *end)
1417 {
1418         int maxrate;
1419         char *custom = pos + IW_EV_LCP_LEN;
1420         struct iw_param p;
1421         size_t clen;
1422
1423         clen = iwe->len;
1424         if (custom + clen > end)
1425                 return;
1426         maxrate = 0;
1427         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1428                 /* Note: may be misaligned, make a local, aligned copy */
1429                 os_memcpy(&p, custom, sizeof(struct iw_param));
1430                 if (p.value > maxrate)
1431                         maxrate = p.value;
1432                 clen -= sizeof(struct iw_param);
1433                 custom += sizeof(struct iw_param);
1434         }
1435
1436         /* Convert the maxrate from WE-style (b/s units) to
1437          * 802.11 rates (500000 b/s units).
1438          */
1439         res->maxrate = maxrate / 500000;
1440 }
1441
1442
1443 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1444                                     struct wext_scan_data *res, char *custom,
1445                                     char *end)
1446 {
1447         char *genie, *gpos, *gend;
1448         u8 *tmp;
1449
1450         if (iwe->u.data.length == 0)
1451                 return;
1452
1453         gpos = genie = custom;
1454         gend = genie + iwe->u.data.length;
1455         if (gend > end) {
1456                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1457                 return;
1458         }
1459
1460         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1461         if (tmp == NULL)
1462                 return;
1463         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1464         res->ie = tmp;
1465         res->ie_len += gend - gpos;
1466 }
1467
1468
1469 static void wext_get_scan_custom(struct iw_event *iwe,
1470                                  struct wext_scan_data *res, char *custom,
1471                                  char *end)
1472 {
1473         size_t clen;
1474         u8 *tmp;
1475
1476         clen = iwe->u.data.length;
1477         if (custom + clen > end)
1478                 return;
1479
1480         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1481                 char *spos;
1482                 int bytes;
1483                 spos = custom + 7;
1484                 bytes = custom + clen - spos;
1485                 if (bytes & 1 || bytes == 0)
1486                         return;
1487                 bytes /= 2;
1488                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1489                 if (tmp == NULL)
1490                         return;
1491                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1492                 res->ie = tmp;
1493                 res->ie_len += bytes;
1494         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1495                 char *spos;
1496                 int bytes;
1497                 spos = custom + 7;
1498                 bytes = custom + clen - spos;
1499                 if (bytes & 1 || bytes == 0)
1500                         return;
1501                 bytes /= 2;
1502                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1503                 if (tmp == NULL)
1504                         return;
1505                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1506                 res->ie = tmp;
1507                 res->ie_len += bytes;
1508         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1509                 char *spos;
1510                 int bytes;
1511                 u8 bin[8];
1512                 spos = custom + 4;
1513                 bytes = custom + clen - spos;
1514                 if (bytes != 16) {
1515                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1516                         return;
1517                 }
1518                 bytes /= 2;
1519                 hexstr2bin(spos, bin, bytes);
1520                 res->res.tsf += WPA_GET_BE64(bin);
1521         }
1522 }
1523
1524
1525 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1526 {
1527         return drv->we_version_compiled > 18 &&
1528                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1529                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1530 }
1531
1532
1533 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1534                                            struct wext_scan_data *data)
1535 {
1536         struct wpa_scan_res **tmp;
1537         struct wpa_scan_res *r;
1538         size_t extra_len;
1539         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1540
1541         /* Figure out whether we need to fake any IEs */
1542         pos = data->ie;
1543         end = pos + data->ie_len;
1544         while (pos && pos + 1 < end) {
1545                 if (pos + 2 + pos[1] > end)
1546                         break;
1547                 if (pos[0] == WLAN_EID_SSID)
1548                         ssid_ie = pos;
1549                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1550                         rate_ie = pos;
1551                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1552                         rate_ie = pos;
1553                 pos += 2 + pos[1];
1554         }
1555
1556         extra_len = 0;
1557         if (ssid_ie == NULL)
1558                 extra_len += 2 + data->ssid_len;
1559         if (rate_ie == NULL && data->maxrate)
1560                 extra_len += 3;
1561
1562         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1563         if (r == NULL)
1564                 return;
1565         os_memcpy(r, &data->res, sizeof(*r));
1566         r->ie_len = extra_len + data->ie_len;
1567         pos = (u8 *) (r + 1);
1568         if (ssid_ie == NULL) {
1569                 /*
1570                  * Generate a fake SSID IE since the driver did not report
1571                  * a full IE list.
1572                  */
1573                 *pos++ = WLAN_EID_SSID;
1574                 *pos++ = data->ssid_len;
1575                 os_memcpy(pos, data->ssid, data->ssid_len);
1576                 pos += data->ssid_len;
1577         }
1578         if (rate_ie == NULL && data->maxrate) {
1579                 /*
1580                  * Generate a fake Supported Rates IE since the driver did not
1581                  * report a full IE list.
1582                  */
1583                 *pos++ = WLAN_EID_SUPP_RATES;
1584                 *pos++ = 1;
1585                 *pos++ = data->maxrate;
1586         }
1587         if (data->ie)
1588                 os_memcpy(pos, data->ie, data->ie_len);
1589
1590         tmp = os_realloc(res->res,
1591                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1592         if (tmp == NULL) {
1593                 os_free(r);
1594                 return;
1595         }
1596         tmp[res->num++] = r;
1597         res->res = tmp;
1598 }
1599
1600
1601 /**
1602  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1603  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1604  * Returns: Scan results on success, -1 on failure
1605  */
1606 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1607 {
1608         struct wpa_driver_wext_data *drv = priv;
1609         size_t ap_num = 0, len;
1610         int first;
1611         u8 *res_buf;
1612         struct iw_event iwe_buf, *iwe = &iwe_buf;
1613         char *pos, *end, *custom;
1614         struct wpa_scan_results *res;
1615         struct wext_scan_data data;
1616
1617         res_buf = wpa_driver_wext_giwscan(drv, &len);
1618         if (res_buf == NULL)
1619                 return NULL;
1620
1621         ap_num = 0;
1622         first = 1;
1623
1624         res = os_zalloc(sizeof(*res));
1625         if (res == NULL) {
1626                 os_free(res_buf);
1627                 return NULL;
1628         }
1629
1630         pos = (char *) res_buf;
1631         end = (char *) res_buf + len;
1632         os_memset(&data, 0, sizeof(data));
1633
1634         while (pos + IW_EV_LCP_LEN <= end) {
1635                 /* Event data may be unaligned, so make a local, aligned copy
1636                  * before processing. */
1637                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1638                 if (iwe->len <= IW_EV_LCP_LEN)
1639                         break;
1640
1641                 custom = pos + IW_EV_POINT_LEN;
1642                 if (wext_19_iw_point(drv, iwe->cmd)) {
1643                         /* WE-19 removed the pointer from struct iw_point */
1644                         char *dpos = (char *) &iwe_buf.u.data.length;
1645                         int dlen = dpos - (char *) &iwe_buf;
1646                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1647                                   sizeof(struct iw_event) - dlen);
1648                 } else {
1649                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1650                         custom += IW_EV_POINT_OFF;
1651                 }
1652
1653                 switch (iwe->cmd) {
1654                 case SIOCGIWAP:
1655                         if (!first)
1656                                 wpa_driver_wext_add_scan_entry(res, &data);
1657                         first = 0;
1658                         os_free(data.ie);
1659                         os_memset(&data, 0, sizeof(data));
1660                         os_memcpy(data.res.bssid,
1661                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1662                         break;
1663                 case SIOCGIWMODE:
1664                         wext_get_scan_mode(iwe, &data);
1665                         break;
1666                 case SIOCGIWESSID:
1667                         wext_get_scan_ssid(iwe, &data, custom, end);
1668                         break;
1669                 case SIOCGIWFREQ:
1670                         wext_get_scan_freq(iwe, &data);
1671                         break;
1672                 case IWEVQUAL:
1673                         wext_get_scan_qual(iwe, &data);
1674                         break;
1675                 case SIOCGIWENCODE:
1676                         wext_get_scan_encode(iwe, &data);
1677                         break;
1678                 case SIOCGIWRATE:
1679                         wext_get_scan_rate(iwe, &data, pos, end);
1680                         break;
1681                 case IWEVGENIE:
1682                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1683                         break;
1684                 case IWEVCUSTOM:
1685                         wext_get_scan_custom(iwe, &data, custom, end);
1686                         break;
1687                 }
1688
1689                 pos += iwe->len;
1690         }
1691         os_free(res_buf);
1692         res_buf = NULL;
1693         if (!first)
1694                 wpa_driver_wext_add_scan_entry(res, &data);
1695         os_free(data.ie);
1696
1697         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1698                    (unsigned long) len, (unsigned long) res->num);
1699
1700         return res;
1701 }
1702
1703
1704 static int wpa_driver_wext_get_range(void *priv)
1705 {
1706         struct wpa_driver_wext_data *drv = priv;
1707         struct iw_range *range;
1708         struct iwreq iwr;
1709         int minlen;
1710         size_t buflen;
1711
1712         /*
1713          * Use larger buffer than struct iw_range in order to allow the
1714          * structure to grow in the future.
1715          */
1716         buflen = sizeof(struct iw_range) + 500;
1717         range = os_zalloc(buflen);
1718         if (range == NULL)
1719                 return -1;
1720
1721         os_memset(&iwr, 0, sizeof(iwr));
1722         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1723         iwr.u.data.pointer = (caddr_t) range;
1724         iwr.u.data.length = buflen;
1725
1726         minlen = ((char *) &range->enc_capa) - (char *) range +
1727                 sizeof(range->enc_capa);
1728
1729         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1730                 perror("ioctl[SIOCGIWRANGE]");
1731                 os_free(range);
1732                 return -1;
1733         } else if (iwr.u.data.length >= minlen &&
1734                    range->we_version_compiled >= 18) {
1735                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1736                            "WE(source)=%d enc_capa=0x%x",
1737                            range->we_version_compiled,
1738                            range->we_version_source,
1739                            range->enc_capa);
1740                 drv->has_capability = 1;
1741                 drv->we_version_compiled = range->we_version_compiled;
1742                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1743                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1744                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1745                 }
1746                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1747                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1748                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1749                 }
1750                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1751                         WPA_DRIVER_CAPA_ENC_WEP104;
1752                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1753                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1754                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1755                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1756                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1757                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1758
1759                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1760                            "flags 0x%x",
1761                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1762         } else {
1763                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1764                            "assuming WPA is not supported");
1765         }
1766
1767         os_free(range);
1768         return 0;
1769 }
1770
1771
1772 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1773 {
1774         struct wpa_driver_wext_data *drv = priv;
1775         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1776
1777         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1778                                               enabled);
1779 }
1780
1781
1782 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1783                                    const u8 *psk)
1784 {
1785         struct iw_encode_ext *ext;
1786         struct iwreq iwr;
1787         int ret;
1788
1789         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1790
1791         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1792                 return 0;
1793
1794         if (!psk)
1795                 return 0;
1796
1797         os_memset(&iwr, 0, sizeof(iwr));
1798         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1799
1800         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1801         if (ext == NULL)
1802                 return -1;
1803
1804         iwr.u.encoding.pointer = (caddr_t) ext;
1805         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1806         ext->key_len = PMK_LEN;
1807         os_memcpy(&ext->key, psk, ext->key_len);
1808         ext->alg = IW_ENCODE_ALG_PMK;
1809
1810         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1811         if (ret < 0)
1812                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1813         os_free(ext);
1814
1815         return ret;
1816 }
1817
1818
1819 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1820                                        const u8 *addr, int key_idx,
1821                                        int set_tx, const u8 *seq,
1822                                        size_t seq_len,
1823                                        const u8 *key, size_t key_len)
1824 {
1825         struct wpa_driver_wext_data *drv = priv;
1826         struct iwreq iwr;
1827         int ret = 0;
1828         struct iw_encode_ext *ext;
1829
1830         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1831                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1832                            __FUNCTION__, (unsigned long) seq_len);
1833                 return -1;
1834         }
1835
1836         ext = os_zalloc(sizeof(*ext) + key_len);
1837         if (ext == NULL)
1838                 return -1;
1839         os_memset(&iwr, 0, sizeof(iwr));
1840         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1841         iwr.u.encoding.flags = key_idx + 1;
1842         if (alg == WPA_ALG_NONE)
1843                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1844         iwr.u.encoding.pointer = (caddr_t) ext;
1845         iwr.u.encoding.length = sizeof(*ext) + key_len;
1846
1847         if (addr == NULL ||
1848             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1849                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1850         if (set_tx)
1851                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1852
1853         ext->addr.sa_family = ARPHRD_ETHER;
1854         if (addr)
1855                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1856         else
1857                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1858         if (key && key_len) {
1859                 os_memcpy(ext + 1, key, key_len);
1860                 ext->key_len = key_len;
1861         }
1862         switch (alg) {
1863         case WPA_ALG_NONE:
1864                 ext->alg = IW_ENCODE_ALG_NONE;
1865                 break;
1866         case WPA_ALG_WEP:
1867                 ext->alg = IW_ENCODE_ALG_WEP;
1868                 break;
1869         case WPA_ALG_TKIP:
1870                 ext->alg = IW_ENCODE_ALG_TKIP;
1871                 break;
1872         case WPA_ALG_CCMP:
1873                 ext->alg = IW_ENCODE_ALG_CCMP;
1874                 break;
1875         case WPA_ALG_PMK:
1876                 ext->alg = IW_ENCODE_ALG_PMK;
1877                 break;
1878 #ifdef WEXT_MFP_PENDING
1879 #ifdef CONFIG_IEEE80211W
1880         case WPA_ALG_IGTK:
1881                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1882                 break;
1883 #endif /* CONFIG_IEEE80211W */
1884 #endif /* WEXT_MFP_PENDING */
1885         default:
1886                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1887                            __FUNCTION__, alg);
1888                 os_free(ext);
1889                 return -1;
1890         }
1891
1892         if (seq && seq_len) {
1893                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1894                 os_memcpy(ext->rx_seq, seq, seq_len);
1895         }
1896
1897         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1898                 ret = errno == EOPNOTSUPP ? -2 : -1;
1899                 if (errno == ENODEV) {
1900                         /*
1901                          * ndiswrapper seems to be returning incorrect error
1902                          * code.. */
1903                         ret = -2;
1904                 }
1905
1906                 perror("ioctl[SIOCSIWENCODEEXT]");
1907         }
1908
1909         os_free(ext);
1910         return ret;
1911 }
1912
1913
1914 /**
1915  * wpa_driver_wext_set_key - Configure encryption key
1916  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1917  * @priv: Private driver interface data
1918  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1919  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1920  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1921  *      broadcast/default keys
1922  * @key_idx: key index (0..3), usually 0 for unicast keys
1923  * @set_tx: Configure this key as the default Tx key (only used when
1924  *      driver does not support separate unicast/individual key
1925  * @seq: Sequence number/packet number, seq_len octets, the next
1926  *      packet number to be used for in replay protection; configured
1927  *      for Rx keys (in most cases, this is only used with broadcast
1928  *      keys and set to zero for unicast keys)
1929  * @seq_len: Length of the seq, depends on the algorithm:
1930  *      TKIP: 6 octets, CCMP: 6 octets
1931  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1932  *      8-byte Rx Mic Key
1933  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1934  *      TKIP: 32, CCMP: 16)
1935  * Returns: 0 on success, -1 on failure
1936  *
1937  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1938  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1939  */
1940 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1941                             const u8 *addr, int key_idx,
1942                             int set_tx, const u8 *seq, size_t seq_len,
1943                             const u8 *key, size_t key_len)
1944 {
1945         struct wpa_driver_wext_data *drv = priv;
1946         struct iwreq iwr;
1947         int ret = 0;
1948
1949         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1950                    "key_len=%lu",
1951                    __FUNCTION__, alg, key_idx, set_tx,
1952                    (unsigned long) seq_len, (unsigned long) key_len);
1953
1954         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1955                                           seq, seq_len, key, key_len);
1956         if (ret == 0)
1957                 return 0;
1958
1959         if (ret == -2 &&
1960             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1961                 wpa_printf(MSG_DEBUG, "Driver did not support "
1962                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1963                 ret = 0;
1964         } else {
1965                 wpa_printf(MSG_DEBUG, "Driver did not support "
1966                            "SIOCSIWENCODEEXT");
1967                 return ret;
1968         }
1969
1970         os_memset(&iwr, 0, sizeof(iwr));
1971         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1972         iwr.u.encoding.flags = key_idx + 1;
1973         if (alg == WPA_ALG_NONE)
1974                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1975         iwr.u.encoding.pointer = (caddr_t) key;
1976         iwr.u.encoding.length = key_len;
1977
1978         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1979                 perror("ioctl[SIOCSIWENCODE]");
1980                 ret = -1;
1981         }
1982
1983         if (set_tx && alg != WPA_ALG_NONE) {
1984                 os_memset(&iwr, 0, sizeof(iwr));
1985                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1986                 iwr.u.encoding.flags = key_idx + 1;
1987                 iwr.u.encoding.pointer = (caddr_t) NULL;
1988                 iwr.u.encoding.length = 0;
1989                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1990                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1991                         ret = -1;
1992                 }
1993         }
1994
1995         return ret;
1996 }
1997
1998
1999 static int wpa_driver_wext_set_countermeasures(void *priv,
2000                                                int enabled)
2001 {
2002         struct wpa_driver_wext_data *drv = priv;
2003         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2004         return wpa_driver_wext_set_auth_param(drv,
2005                                               IW_AUTH_TKIP_COUNTERMEASURES,
2006                                               enabled);
2007 }
2008
2009
2010 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
2011                                                 int enabled)
2012 {
2013         struct wpa_driver_wext_data *drv = priv;
2014         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2015         drv->use_crypt = enabled;
2016         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2017                                               enabled);
2018 }
2019
2020
2021 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
2022                                 const u8 *addr, int cmd, int reason_code)
2023 {
2024         struct iwreq iwr;
2025         struct iw_mlme mlme;
2026         int ret = 0;
2027
2028         os_memset(&iwr, 0, sizeof(iwr));
2029         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2030         os_memset(&mlme, 0, sizeof(mlme));
2031         mlme.cmd = cmd;
2032         mlme.reason_code = reason_code;
2033         mlme.addr.sa_family = ARPHRD_ETHER;
2034         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2035         iwr.u.data.pointer = (caddr_t) &mlme;
2036         iwr.u.data.length = sizeof(mlme);
2037
2038         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2039                 perror("ioctl[SIOCSIWMLME]");
2040                 ret = -1;
2041         }
2042
2043         return ret;
2044 }
2045
2046
2047 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
2048                                           int reason_code)
2049 {
2050         struct wpa_driver_wext_data *drv = priv;
2051         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2052         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2053 }
2054
2055
2056 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
2057                                         int reason_code)
2058 {
2059         struct wpa_driver_wext_data *drv = priv;
2060         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2061         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
2062                                     reason_code);
2063 }
2064
2065
2066 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2067                                       size_t ie_len)
2068 {
2069         struct wpa_driver_wext_data *drv = priv;
2070         struct iwreq iwr;
2071         int ret = 0;
2072
2073         os_memset(&iwr, 0, sizeof(iwr));
2074         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2075         iwr.u.data.pointer = (caddr_t) ie;
2076         iwr.u.data.length = ie_len;
2077
2078         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2079                 perror("ioctl[SIOCSIWGENIE]");
2080                 ret = -1;
2081         }
2082
2083         return ret;
2084 }
2085
2086
2087 int wpa_driver_wext_cipher2wext(int cipher)
2088 {
2089         switch (cipher) {
2090         case CIPHER_NONE:
2091                 return IW_AUTH_CIPHER_NONE;
2092         case CIPHER_WEP40:
2093                 return IW_AUTH_CIPHER_WEP40;
2094         case CIPHER_TKIP:
2095                 return IW_AUTH_CIPHER_TKIP;
2096         case CIPHER_CCMP:
2097                 return IW_AUTH_CIPHER_CCMP;
2098         case CIPHER_WEP104:
2099                 return IW_AUTH_CIPHER_WEP104;
2100         default:
2101                 return 0;
2102         }
2103 }
2104
2105
2106 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2107 {
2108         switch (keymgmt) {
2109         case KEY_MGMT_802_1X:
2110         case KEY_MGMT_802_1X_NO_WPA:
2111                 return IW_AUTH_KEY_MGMT_802_1X;
2112         case KEY_MGMT_PSK:
2113                 return IW_AUTH_KEY_MGMT_PSK;
2114         default:
2115                 return 0;
2116         }
2117 }
2118
2119
2120 static int
2121 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2122                                   struct wpa_driver_associate_params *params)
2123 {
2124         struct iwreq iwr;
2125         int ret = 0;
2126
2127         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2128                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2129
2130         os_memset(&iwr, 0, sizeof(iwr));
2131         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2132         /* Just changing mode, not actual keys */
2133         iwr.u.encoding.flags = 0;
2134         iwr.u.encoding.pointer = (caddr_t) NULL;
2135         iwr.u.encoding.length = 0;
2136
2137         /*
2138          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2139          * different things. Here they are used to indicate Open System vs.
2140          * Shared Key authentication algorithm. However, some drivers may use
2141          * them to select between open/restricted WEP encrypted (open = allow
2142          * both unencrypted and encrypted frames; restricted = only allow
2143          * encrypted frames).
2144          */
2145
2146         if (!drv->use_crypt) {
2147                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2148         } else {
2149                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2150                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2151                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2152                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2153         }
2154
2155         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2156                 perror("ioctl[SIOCSIWENCODE]");
2157                 ret = -1;
2158         }
2159
2160         return ret;
2161 }
2162
2163
2164 int wpa_driver_wext_associate(void *priv,
2165                               struct wpa_driver_associate_params *params)
2166 {
2167         struct wpa_driver_wext_data *drv = priv;
2168         int ret = 0;
2169         int allow_unencrypted_eapol;
2170         int value;
2171
2172         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2173
2174         /*
2175          * If the driver did not support SIOCSIWAUTH, fallback to
2176          * SIOCSIWENCODE here.
2177          */
2178         if (drv->auth_alg_fallback &&
2179             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2180                 ret = -1;
2181
2182         if (!params->bssid &&
2183             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2184                 ret = -1;
2185
2186         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2187                 ret = -1;
2188         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2189          * from configuration, not from here, where only the selected suite is
2190          * available */
2191         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2192             < 0)
2193                 ret = -1;
2194         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2195                 value = IW_AUTH_WPA_VERSION_DISABLED;
2196         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2197                 value = IW_AUTH_WPA_VERSION_WPA2;
2198         else
2199                 value = IW_AUTH_WPA_VERSION_WPA;
2200         if (wpa_driver_wext_set_auth_param(drv,
2201                                            IW_AUTH_WPA_VERSION, value) < 0)
2202                 ret = -1;
2203         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2204         if (wpa_driver_wext_set_auth_param(drv,
2205                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2206                 ret = -1;
2207         value = wpa_driver_wext_cipher2wext(params->group_suite);
2208         if (wpa_driver_wext_set_auth_param(drv,
2209                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2210                 ret = -1;
2211         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2212         if (wpa_driver_wext_set_auth_param(drv,
2213                                            IW_AUTH_KEY_MGMT, value) < 0)
2214                 ret = -1;
2215         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2216                 params->pairwise_suite != CIPHER_NONE ||
2217                 params->group_suite != CIPHER_NONE ||
2218                 params->wpa_ie_len;
2219         if (wpa_driver_wext_set_auth_param(drv,
2220                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2221                 ret = -1;
2222
2223         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2224          * not using WPA. IEEE 802.1X specifies that these frames are not
2225          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2226         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2227             params->key_mgmt_suite == KEY_MGMT_PSK)
2228                 allow_unencrypted_eapol = 0;
2229         else
2230                 allow_unencrypted_eapol = 1;
2231
2232         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2233                 ret = -1;
2234         if (wpa_driver_wext_set_auth_param(drv,
2235                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2236                                            allow_unencrypted_eapol) < 0)
2237                 ret = -1;
2238 #ifdef WEXT_MFP_PENDING
2239 #ifdef CONFIG_IEEE80211W
2240         switch (params->mgmt_frame_protection) {
2241         case NO_MGMT_FRAME_PROTECTION:
2242                 value = IW_AUTH_MFP_DISABLED;
2243                 break;
2244         case MGMT_FRAME_PROTECTION_OPTIONAL:
2245                 value = IW_AUTH_MFP_OPTIONAL;
2246                 break;
2247         case MGMT_FRAME_PROTECTION_REQUIRED:
2248                 value = IW_AUTH_MFP_REQUIRED;
2249                 break;
2250         };
2251         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2252                 ret = -1;
2253 #endif /* CONFIG_IEEE80211W */
2254 #endif /* WEXT_MFP_PENDING */
2255         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2256                 ret = -1;
2257         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2258                 ret = -1;
2259         if (params->bssid &&
2260             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2261                 ret = -1;
2262
2263         return ret;
2264 }
2265
2266
2267 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2268 {
2269         struct wpa_driver_wext_data *drv = priv;
2270         int algs = 0, res;
2271
2272         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2273                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2274         if (auth_alg & AUTH_ALG_SHARED_KEY)
2275                 algs |= IW_AUTH_ALG_SHARED_KEY;
2276         if (auth_alg & AUTH_ALG_LEAP)
2277                 algs |= IW_AUTH_ALG_LEAP;
2278         if (algs == 0) {
2279                 /* at least one algorithm should be set */
2280                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2281         }
2282
2283         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2284                                              algs);
2285         drv->auth_alg_fallback = res == -2;
2286         return res;
2287 }
2288
2289
2290 /**
2291  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2292  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2293  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2294  * Returns: 0 on success, -1 on failure
2295  */
2296 int wpa_driver_wext_set_mode(void *priv, int mode)
2297 {
2298         struct wpa_driver_wext_data *drv = priv;
2299         struct iwreq iwr;
2300         int ret = -1, flags;
2301         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2302
2303         os_memset(&iwr, 0, sizeof(iwr));
2304         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2305         iwr.u.mode = new_mode;
2306         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2307                 ret = 0;
2308                 goto done;
2309         }
2310
2311         if (errno != EBUSY) {
2312                 perror("ioctl[SIOCSIWMODE]");
2313                 goto done;
2314         }
2315
2316         /* mac80211 doesn't allow mode changes while the device is up, so if
2317          * the device isn't in the mode we're about to change to, take device
2318          * down, try to set the mode again, and bring it back up.
2319          */
2320         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2321                 perror("ioctl[SIOCGIWMODE]");
2322                 goto done;
2323         }
2324
2325         if (iwr.u.mode == new_mode) {
2326                 ret = 0;
2327                 goto done;
2328         }
2329
2330         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2331                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2332
2333                 /* Try to set the mode again while the interface is down */
2334                 iwr.u.mode = new_mode;
2335                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2336                         perror("ioctl[SIOCSIWMODE]");
2337                 else
2338                         ret = 0;
2339
2340                 /* Ignore return value of get_ifflags to ensure that the device
2341                  * is always up like it was before this function was called.
2342                  */
2343                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2344                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2345         }
2346
2347 done:
2348         return ret;
2349 }
2350
2351
2352 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2353                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2354 {
2355         struct iwreq iwr;
2356         struct iw_pmksa pmksa;
2357         int ret = 0;
2358
2359         os_memset(&iwr, 0, sizeof(iwr));
2360         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2361         os_memset(&pmksa, 0, sizeof(pmksa));
2362         pmksa.cmd = cmd;
2363         pmksa.bssid.sa_family = ARPHRD_ETHER;
2364         if (bssid)
2365                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2366         if (pmkid)
2367                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2368         iwr.u.data.pointer = (caddr_t) &pmksa;
2369         iwr.u.data.length = sizeof(pmksa);
2370
2371         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2372                 if (errno != EOPNOTSUPP)
2373                         perror("ioctl[SIOCSIWPMKSA]");
2374                 ret = -1;
2375         }
2376
2377         return ret;
2378 }
2379
2380
2381 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2382                                      const u8 *pmkid)
2383 {
2384         struct wpa_driver_wext_data *drv = priv;
2385         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2386 }
2387
2388
2389 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2390                                         const u8 *pmkid)
2391 {
2392         struct wpa_driver_wext_data *drv = priv;
2393         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2394 }
2395
2396
2397 static int wpa_driver_wext_flush_pmkid(void *priv)
2398 {
2399         struct wpa_driver_wext_data *drv = priv;
2400         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2401 }
2402
2403
2404 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2405 {
2406         struct wpa_driver_wext_data *drv = priv;
2407         if (!drv->has_capability)
2408                 return -1;
2409         os_memcpy(capa, &drv->capa, sizeof(*capa));
2410         return 0;
2411 }
2412
2413
2414 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2415                                         const char *ifname)
2416 {
2417         if (ifname == NULL) {
2418                 drv->ifindex2 = -1;
2419                 return 0;
2420         }
2421
2422         drv->ifindex2 = if_nametoindex(ifname);
2423         if (drv->ifindex2 <= 0)
2424                 return -1;
2425
2426         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2427                    "wireless events", drv->ifindex2, ifname);
2428
2429         return 0;
2430 }
2431
2432
2433 int wpa_driver_wext_set_operstate(void *priv, int state)
2434 {
2435         struct wpa_driver_wext_data *drv = priv;
2436
2437         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2438                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2439         drv->operstate = state;
2440         return wpa_driver_wext_send_oper_ifla(
2441                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2442 }
2443
2444
2445 #ifdef CONFIG_CLIENT_MLME
2446 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2447                          struct prism2_hostapd_param *param, int len)
2448 {
2449         struct iwreq iwr;
2450
2451         os_memset(&iwr, 0, sizeof(iwr));
2452         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2453         iwr.u.data.pointer = (caddr_t) param;
2454         iwr.u.data.length = len;
2455
2456         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2457                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2458                 return -1;
2459         }
2460
2461         return 0;
2462 }
2463
2464
2465 static struct wpa_hw_modes *
2466 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2467 {
2468         struct wpa_driver_wext_data *drv = priv;
2469         struct prism2_hostapd_param *param;
2470         u8 *pos, *end;
2471         struct wpa_hw_modes *modes = NULL;
2472         int i;
2473
2474         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2475         if (param == NULL)
2476                 return NULL;
2477         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2478
2479         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2480                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2481                 goto out;
2482         }
2483
2484         *num_modes = param->u.hw_features.num_modes;
2485         *flags = param->u.hw_features.flags;
2486
2487         pos = param->u.hw_features.data;
2488         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2489                 (param->u.hw_features.data - (u8 *) param);
2490
2491         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2492         if (modes == NULL)
2493                 goto out;
2494
2495         for (i = 0; i < *num_modes; i++) {
2496                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2497                 struct wpa_hw_modes *feature;
2498                 int clen, rlen;
2499
2500                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2501                 pos = (u8 *) (hdr + 1);
2502                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2503                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2504
2505                 feature = &modes[i];
2506                 switch (hdr->mode) {
2507                 case MODE_IEEE80211A:
2508                         feature->mode = WPA_MODE_IEEE80211A;
2509                         break;
2510                 case MODE_IEEE80211B:
2511                         feature->mode = WPA_MODE_IEEE80211B;
2512                         break;
2513                 case MODE_IEEE80211G:
2514                         feature->mode = WPA_MODE_IEEE80211G;
2515                         break;
2516                 case MODE_ATHEROS_TURBO:
2517                 case MODE_ATHEROS_TURBOG:
2518                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2519                                    "get_hw_features data", hdr->mode);
2520                         pos += clen + rlen;
2521                         continue;
2522                 default:
2523                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2524                                    "get_hw_features data", hdr->mode);
2525                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2526                         modes = NULL;
2527                         break;
2528                 }
2529                 feature->num_channels = hdr->num_channels;
2530                 feature->num_rates = hdr->num_rates;
2531
2532                 feature->channels = os_malloc(clen);
2533                 feature->rates = os_malloc(rlen);
2534                 if (!feature->channels || !feature->rates ||
2535                     pos + clen + rlen > end) {
2536                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2537                         modes = NULL;
2538                         break;
2539                 }
2540
2541                 os_memcpy(feature->channels, pos, clen);
2542                 pos += clen;
2543                 os_memcpy(feature->rates, pos, rlen);
2544                 pos += rlen;
2545         }
2546
2547 out:
2548         os_free(param);
2549         return modes;
2550 }
2551
2552
2553 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2554                                 int freq)
2555 {
2556         return wpa_driver_wext_set_freq(priv, freq);
2557 }
2558
2559
2560 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2561                                       void *sock_ctx)
2562 {
2563         struct wpa_driver_wext_data *drv = eloop_ctx;
2564         int len;
2565         unsigned char buf[3000];
2566         struct ieee80211_frame_info *fi;
2567         struct ieee80211_rx_status rx_status;
2568
2569         len = recv(sock, buf, sizeof(buf), 0);
2570         if (len < 0) {
2571                 perror("recv[MLME]");
2572                 return;
2573         }
2574
2575         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2576                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2577                            len);
2578                 return;
2579         }
2580
2581         fi = (struct ieee80211_frame_info *) buf;
2582         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2583                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2584                            "0x%x", ntohl(fi->version));
2585                 return;
2586         }
2587
2588         os_memset(&rx_status, 0, sizeof(rx_status));
2589         rx_status.ssi = ntohl(fi->ssi_signal);
2590         rx_status.channel = ntohl(fi->channel);
2591
2592         wpa_supplicant_sta_rx(drv->ctx,
2593                               buf + sizeof(struct ieee80211_frame_info),
2594                               len - sizeof(struct ieee80211_frame_info),
2595                               &rx_status);
2596 }
2597
2598
2599 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2600 {
2601         int flags, ifindex, s;
2602         struct sockaddr_ll addr;
2603         struct ifreq ifr;
2604
2605         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME, 1) <
2606             0) {
2607                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2608                            "use user space MLME");
2609                 return -1;
2610         }
2611
2612         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 1) < 0) {
2613                 wpa_printf(MSG_ERROR, "WEXT: Failed to add management "
2614                            "interface for user space MLME");
2615                 return -1;
2616         }
2617
2618         ifindex = wpa_driver_prism2_param_get(drv, PRISM2_PARAM_MGMT_IF);
2619         if (ifindex <= 0) {
2620                 wpa_printf(MSG_ERROR, "WEXT: MLME management device not "
2621                            "found");
2622                 return -1;
2623         }
2624
2625         os_memset(&ifr, 0, sizeof(ifr));
2626         ifr.ifr_ifindex = ifindex;
2627         if (ioctl(drv->ioctl_sock, SIOCGIFNAME, &ifr) != 0) {
2628                 perror("ioctl(SIOCGIFNAME)");
2629                 return -1;
2630         }
2631         os_strlcpy(drv->mlmedev, ifr.ifr_name, sizeof(drv->mlmedev));
2632         wpa_printf(MSG_DEBUG, "WEXT: MLME management device '%s'",
2633                    drv->mlmedev);
2634
2635         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2636             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2637                                                   flags | IFF_UP) != 0) {
2638                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2639                            "'%s' UP", drv->mlmedev);
2640                 return -1;
2641         }
2642
2643         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2644         if (s < 0) {
2645                 perror("socket[PF_PACKET,SOCK_RAW]");
2646                 return -1;
2647         }
2648
2649         os_memset(&addr, 0, sizeof(addr));
2650         addr.sll_family = AF_PACKET;
2651         addr.sll_ifindex = ifindex;
2652
2653         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2654                 perror("bind(MLME)");
2655                 return -1;
2656         }
2657
2658         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2659         {
2660                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2661                            "socket");
2662                 close(s);
2663                 return -1;
2664         }
2665
2666         return s;
2667 }
2668
2669
2670 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2671                                      size_t data_len)
2672 {
2673         struct wpa_driver_wext_data *drv = priv;
2674         int ret;
2675
2676         ret = send(drv->mlme_sock, data, data_len, 0);
2677         if (ret < 0) {
2678                 perror("send[MLME]");
2679                 return -1;
2680         }
2681
2682         return 0;
2683 }
2684
2685
2686 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2687                                         const u8 *supp_rates,
2688                                         size_t supp_rates_len)
2689 {
2690         struct wpa_driver_wext_data *drv = priv;
2691         struct prism2_hostapd_param param;
2692         size_t len;
2693
2694         os_memset(&param, 0, sizeof(param));
2695         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2696         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2697         len = supp_rates_len;
2698         if (len > sizeof(param.u.add_sta.supp_rates))
2699                 len = sizeof(param.u.add_sta.supp_rates);
2700         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2701         return hostapd_ioctl(drv, &param, sizeof(param));
2702 }
2703
2704
2705 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2706 {
2707         struct wpa_driver_wext_data *drv = priv;
2708         struct prism2_hostapd_param param;
2709
2710         os_memset(&param, 0, sizeof(param));
2711         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2712         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2713         return hostapd_ioctl(drv, &param, sizeof(param));
2714 }
2715
2716 #endif /* CONFIG_CLIENT_MLME */
2717
2718
2719 static int wpa_driver_wext_set_param(void *priv, const char *param)
2720 {
2721 #ifdef CONFIG_CLIENT_MLME
2722         struct wpa_driver_wext_data *drv = priv;
2723
2724         if (param == NULL)
2725                 return 0;
2726
2727         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2728
2729         if (os_strstr(param, "use_mlme=1")) {
2730                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME");
2731                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2732
2733                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2734                 if (drv->mlme_sock < 0)
2735                         return -1;
2736         }
2737 #endif /* CONFIG_CLIENT_MLME */
2738
2739         return 0;
2740 }
2741
2742
2743 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2744 {
2745         return drv->we_version_compiled;
2746 }
2747
2748
2749 const struct wpa_driver_ops wpa_driver_wext_ops = {
2750         .name = "wext",
2751         .desc = "Linux wireless extensions (generic)",
2752         .get_bssid = wpa_driver_wext_get_bssid,
2753         .get_ssid = wpa_driver_wext_get_ssid,
2754         .set_wpa = wpa_driver_wext_set_wpa,
2755         .set_key = wpa_driver_wext_set_key,
2756         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2757         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2758         .scan = wpa_driver_wext_scan,
2759         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2760         .deauthenticate = wpa_driver_wext_deauthenticate,
2761         .disassociate = wpa_driver_wext_disassociate,
2762         .associate = wpa_driver_wext_associate,
2763         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2764         .init = wpa_driver_wext_init,
2765         .deinit = wpa_driver_wext_deinit,
2766         .set_param = wpa_driver_wext_set_param,
2767         .add_pmkid = wpa_driver_wext_add_pmkid,
2768         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2769         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2770         .get_capa = wpa_driver_wext_get_capa,
2771         .set_operstate = wpa_driver_wext_set_operstate,
2772 #ifdef CONFIG_CLIENT_MLME
2773         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2774         .set_channel = wpa_driver_wext_set_channel,
2775         .set_ssid = wpa_driver_wext_set_ssid,
2776         .set_bssid = wpa_driver_wext_set_bssid,
2777         .send_mlme = wpa_driver_wext_send_mlme,
2778         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2779         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2780 #endif /* CONFIG_CLIENT_MLME */
2781 };