src/drivers/driver_hostap.c

   1 /*
   2  * Driver interaction with Linux Host AP driver
   3  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #include <sys/ioctl.h>
  11
  12 #include "linux_wext.h"
  13 #include "common.h"
  14 #include "driver.h"
  15 #include "driver_wext.h"
  16 #include "eloop.h"
  17 #include "driver_hostap.h"
  18
  19
  20 #include <net/if_arp.h>
  21 #include <netpacket/packet.h>
  22
  23 #include "priv_netlink.h"
  24 #include "netlink.h"
  25 #include "linux_ioctl.h"
  26 #include "common/ieee802_11_defs.h"
  27 #include "common/ieee802_11_common.h"
  28
  29
  30 /* MTU to be set for the wlan#ap device; this is mainly needed for IEEE 802.1X
  31  * frames that might be longer than normal default MTU and they are not
  32  * fragmented */
  33 #define HOSTAPD_MTU 2290
  34
  35 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
  36
  37 struct hostap_driver_data {
  38         struct hostapd_data *hapd;
  39
  40         char iface[IFNAMSIZ + 1];
  41         int sock; /* raw packet socket for driver access */
  42         int ioctl_sock; /* socket for ioctl() use */
  43         struct netlink_data *netlink;
  44
  45         int we_version;
  46
  47         u8 *generic_ie;
  48         size_t generic_ie_len;
  49         u8 *wps_ie;
  50         size_t wps_ie_len;
  51 };
  52
  53
  54 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
  55                          int len);
  56 static int hostap_set_iface_flags(void *priv, int dev_up);
  57
  58 static void handle_data(struct hostap_driver_data *drv, u8 *buf, size_t len,
  59                         u16 stype)
  60 {
  61         struct ieee80211_hdr *hdr;
  62         u16 fc, ethertype;
  63         u8 *pos, *sa;
  64         size_t left;
  65         union wpa_event_data event;
  66
  67         if (len < sizeof(struct ieee80211_hdr))
  68                 return;
  69
  70         hdr = (struct ieee80211_hdr *) buf;
  71         fc = le_to_host16(hdr->frame_control);
  72
  73         if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) {
  74                 printf("Not ToDS data frame (fc=0x%04x)\n", fc);
  75                 return;
  76         }
  77
  78         sa = hdr->addr2;
  79         os_memset(&event, 0, sizeof(event));
  80         event.rx_from_unknown.bssid = get_hdr_bssid(hdr, len);
  81         event.rx_from_unknown.addr = sa;
  82         wpa_supplicant_event(drv->hapd, EVENT_RX_FROM_UNKNOWN, &event);
  83
  84         pos = (u8 *) (hdr + 1);
  85         left = len - sizeof(*hdr);
  86
  87         if (left < sizeof(rfc1042_header)) {
  88                 printf("Too short data frame\n");
  89                 return;
  90         }
  91
  92         if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) {
  93                 printf("Data frame with no RFC1042 header\n");
  94                 return;
  95         }
  96         pos += sizeof(rfc1042_header);
  97         left -= sizeof(rfc1042_header);
  98
  99         if (left < 2) {
 100                 printf("No ethertype in data frame\n");
 101                 return;
 102         }
 103
 104         ethertype = WPA_GET_BE16(pos);
 105         pos += 2;
 106         left -= 2;
 107         switch (ethertype) {
 108         case ETH_P_PAE:
 109                 drv_event_eapol_rx(drv->hapd, sa, pos, left);
 110                 break;
 111
 112         default:
 113                 printf("Unknown ethertype 0x%04x in data frame\n", ethertype);
 114                 break;
 115         }
 116 }
 117
 118
 119 static void handle_tx_callback(struct hostap_driver_data *drv, u8 *buf,
 120                                size_t len, int ok)
 121 {
 122         struct ieee80211_hdr *hdr;
 123         u16 fc;
 124         union wpa_event_data event;
 125
 126         hdr = (struct ieee80211_hdr *) buf;
 127         fc = le_to_host16(hdr->frame_control);
 128
 129         os_memset(&event, 0, sizeof(event));
 130         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 131         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 132         event.tx_status.dst = hdr->addr1;
 133         event.tx_status.data = buf;
 134         event.tx_status.data_len = len;
 135         event.tx_status.ack = ok;
 136         wpa_supplicant_event(drv->hapd, EVENT_TX_STATUS, &event);
 137 }
 138
 139
 140 static void handle_frame(struct hostap_driver_data *drv, u8 *buf, size_t len)
 141 {
 142         struct ieee80211_hdr *hdr;
 143         u16 fc, type, stype;
 144         size_t data_len = len;
 145         int ver;
 146         union wpa_event_data event;
 147
 148         /* PSPOLL is only 16 bytes, but driver does not (at least yet) pass
 149          * these to user space */
 150         if (len < 24) {
 151                 wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)",
 152                            (unsigned long) len);
 153                 return;
 154         }
 155
 156         hdr = (struct ieee80211_hdr *) buf;
 157         fc = le_to_host16(hdr->frame_control);
 158         type = WLAN_FC_GET_TYPE(fc);
 159         stype = WLAN_FC_GET_STYPE(fc);
 160
 161         if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) {
 162                 wpa_hexdump(MSG_MSGDUMP, "Received management frame",
 163                             buf, len);
 164         }
 165
 166         ver = fc & WLAN_FC_PVER;
 167
 168         /* protocol version 2 is reserved for indicating ACKed frame (TX
 169          * callbacks), and version 1 for indicating failed frame (no ACK, TX
 170          * callbacks) */
 171         if (ver == 1 || ver == 2) {
 172                 handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0);
 173                 return;
 174         } else if (ver != 0) {
 175                 printf("unknown protocol version %d\n", ver);
 176                 return;
 177         }
 178
 179         switch (type) {
 180         case WLAN_FC_TYPE_MGMT:
 181                 os_memset(&event, 0, sizeof(event));
 182                 event.rx_mgmt.frame = buf;
 183                 event.rx_mgmt.frame_len = data_len;
 184                 wpa_supplicant_event(drv->hapd, EVENT_RX_MGMT, &event);
 185                 break;
 186         case WLAN_FC_TYPE_CTRL:
 187                 wpa_printf(MSG_DEBUG, "CTRL");
 188                 break;
 189         case WLAN_FC_TYPE_DATA:
 190                 wpa_printf(MSG_DEBUG, "DATA");
 191                 handle_data(drv, buf, data_len, stype);
 192                 break;
 193         default:
 194                 wpa_printf(MSG_DEBUG, "unknown frame type %d", type);
 195                 break;
 196         }
 197 }
 198
 199
 200 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
 201 {
 202         struct hostap_driver_data *drv = eloop_ctx;
 203         int len;
 204         unsigned char buf[3000];
 205
 206         len = recv(sock, buf, sizeof(buf), 0);
 207         if (len < 0) {
 208                 wpa_printf(MSG_ERROR, "recv: %s", strerror(errno));
 209                 return;
 210         }
 211
 212         handle_frame(drv, buf, len);
 213 }
 214
 215
 216 static int hostap_init_sockets(struct hostap_driver_data *drv, u8 *own_addr)
 217 {
 218         struct ifreq ifr;
 219         struct sockaddr_ll addr;
 220
 221         drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 222         if (drv->sock < 0) {
 223                 wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s",
 224                            strerror(errno));
 225                 return -1;
 226         }
 227
 228         if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) {
 229                 wpa_printf(MSG_ERROR, "Could not register read socket");
 230                 return -1;
 231         }
 232
 233         memset(&ifr, 0, sizeof(ifr));
 234         snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", drv->iface);
 235         if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
 236                 wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s",
 237                            strerror(errno));
 238                 return -1;
 239         }
 240
 241         if (hostap_set_iface_flags(drv, 1)) {
 242                 return -1;
 243         }
 244
 245         memset(&addr, 0, sizeof(addr));
 246         addr.sll_family = AF_PACKET;
 247         addr.sll_ifindex = ifr.ifr_ifindex;
 248         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
 249                    addr.sll_ifindex);
 250
 251         if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 252                 wpa_printf(MSG_ERROR, "bind: %s", strerror(errno));
 253                 return -1;
 254         }
 255
 256         return linux_get_ifhwaddr(drv->sock, drv->iface, own_addr);
 257 }
 258
 259
 260 static int hostap_send_mlme(void *priv, const u8 *msg, size_t len, int noack,
 261                             unsigned int freq,
 262                             const u16 *csa_offs, size_t csa_offs_len)
 263 {
 264         struct hostap_driver_data *drv = priv;
 265         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg;
 266         int res;
 267
 268         /* Request TX callback */
 269         hdr->frame_control |= host_to_le16(BIT(1));
 270         res = send(drv->sock, msg, len, 0);
 271         hdr->frame_control &= ~host_to_le16(BIT(1));
 272
 273         return res;
 274 }
 275
 276
 277 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data,
 278                              size_t data_len, int encrypt, const u8 *own_addr,
 279                              u32 flags)
 280 {
 281         struct hostap_driver_data *drv = priv;
 282         struct ieee80211_hdr *hdr;
 283         size_t len;
 284         u8 *pos;
 285         int res;
 286
 287         len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len;
 288         hdr = os_zalloc(len);
 289         if (hdr == NULL) {
 290                 printf("malloc() failed for hostapd_send_data(len=%lu)\n",
 291                        (unsigned long) len);
 292                 return -1;
 293         }
 294
 295         hdr->frame_control =
 296                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 297         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 298         if (encrypt)
 299                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 300         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 301         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 302         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 303
 304         pos = (u8 *) (hdr + 1);
 305         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 306         pos += sizeof(rfc1042_header);
 307         *((u16 *) pos) = htons(ETH_P_PAE);
 308         pos += 2;
 309         memcpy(pos, data, data_len);
 310
 311         res = hostap_send_mlme(drv, (u8 *) hdr, len, 0, 0, NULL, 0);
 312         if (res < 0) {
 313                 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - "
 314                            "failed: %d (%s)",
 315                            (unsigned long) len, errno, strerror(errno));
 316         }
 317         os_free(hdr);
 318
 319         return res;
 320 }
 321
 322
 323 static int hostap_sta_set_flags(void *priv, const u8 *addr,
 324                                 unsigned int total_flags, unsigned int flags_or,
 325                                 unsigned int flags_and)
 326 {
 327         struct hostap_driver_data *drv = priv;
 328         struct prism2_hostapd_param param;
 329
 330         if (flags_or & WPA_STA_AUTHORIZED)
 331                 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */
 332         if (!(flags_and & WPA_STA_AUTHORIZED))
 333                 flags_and = ~BIT(5);
 334         else
 335                 flags_and = ~0;
 336         memset(&param, 0, sizeof(param));
 337         param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA;
 338         memcpy(param.sta_addr, addr, ETH_ALEN);
 339         param.u.set_flags_sta.flags_or = flags_or;
 340         param.u.set_flags_sta.flags_and = flags_and;
 341         return hostapd_ioctl(drv, &param, sizeof(param));
 342 }
 343
 344
 345 static int hostap_set_iface_flags(void *priv, int dev_up)
 346 {
 347         struct hostap_driver_data *drv = priv;
 348         struct ifreq ifr;
 349         char ifname[IFNAMSIZ];
 350
 351         os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface);
 352         if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0)
 353                 return -1;
 354
 355         if (dev_up) {
 356                 memset(&ifr, 0, sizeof(ifr));
 357                 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 358                 ifr.ifr_mtu = HOSTAPD_MTU;
 359                 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
 360                         wpa_printf(MSG_INFO,
 361                                    "Setting MTU failed - trying to survive with current value: ioctl[SIOCSIFMTU]: %s",
 362                                    strerror(errno));
 363                 }
 364         }
 365
 366         return 0;
 367 }
 368
 369
 370 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
 371                          int len)
 372 {
 373         struct hostap_driver_data *drv = priv;
 374         struct iwreq iwr;
 375
 376         memset(&iwr, 0, sizeof(iwr));
 377         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 378         iwr.u.data.pointer = (caddr_t) param;
 379         iwr.u.data.length = len;
 380
 381         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
 382                 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_HOSTAPD]: %s",
 383                            strerror(errno));
 384                 return -1;
 385         }
 386
 387         return 0;
 388 }
 389
 390
 391 static int wpa_driver_hostap_set_key(const char *ifname, void *priv,
 392                                      enum wpa_alg alg, const u8 *addr,
 393                                      int key_idx, int set_tx,
 394                                      const u8 *seq, size_t seq_len,
 395                                      const u8 *key, size_t key_len)
 396 {
 397         struct hostap_driver_data *drv = priv;
 398         struct prism2_hostapd_param *param;
 399         u8 *buf;
 400         size_t blen;
 401         int ret = 0;
 402
 403         blen = sizeof(*param) + key_len;
 404         buf = os_zalloc(blen);
 405         if (buf == NULL)
 406                 return -1;
 407
 408         param = (struct prism2_hostapd_param *) buf;
 409         param->cmd = PRISM2_SET_ENCRYPTION;
 410         if (addr == NULL)
 411                 memset(param->sta_addr, 0xff, ETH_ALEN);
 412         else
 413                 memcpy(param->sta_addr, addr, ETH_ALEN);
 414         switch (alg) {
 415         case WPA_ALG_NONE:
 416                 os_strlcpy((char *) param->u.crypt.alg, "NONE",
 417                            HOSTAP_CRYPT_ALG_NAME_LEN);
 418                 break;
 419         case WPA_ALG_WEP:
 420                 os_strlcpy((char *) param->u.crypt.alg, "WEP",
 421                            HOSTAP_CRYPT_ALG_NAME_LEN);
 422                 break;
 423         case WPA_ALG_TKIP:
 424                 os_strlcpy((char *) param->u.crypt.alg, "TKIP",
 425                            HOSTAP_CRYPT_ALG_NAME_LEN);
 426                 break;
 427         case WPA_ALG_CCMP:
 428                 os_strlcpy((char *) param->u.crypt.alg, "CCMP",
 429                            HOSTAP_CRYPT_ALG_NAME_LEN);
 430                 break;
 431         default:
 432                 os_free(buf);
 433                 return -1;
 434         }
 435         param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
 436         param->u.crypt.idx = key_idx;
 437         param->u.crypt.key_len = key_len;
 438         memcpy((u8 *) (param + 1), key, key_len);
 439
 440         if (hostapd_ioctl(drv, param, blen)) {
 441                 printf("Failed to set encryption.\n");
 442                 ret = -1;
 443         }
 444         free(buf);
 445
 446         return ret;
 447 }
 448
 449
 450 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr,
 451                              int idx, u8 *seq)
 452 {
 453         struct hostap_driver_data *drv = priv;
 454         struct prism2_hostapd_param *param;
 455         u8 *buf;
 456         size_t blen;
 457         int ret = 0;
 458
 459         blen = sizeof(*param) + 32;
 460         buf = os_zalloc(blen);
 461         if (buf == NULL)
 462                 return -1;
 463
 464         param = (struct prism2_hostapd_param *) buf;
 465         param->cmd = PRISM2_GET_ENCRYPTION;
 466         if (addr == NULL)
 467                 os_memset(param->sta_addr, 0xff, ETH_ALEN);
 468         else
 469                 os_memcpy(param->sta_addr, addr, ETH_ALEN);
 470         param->u.crypt.idx = idx;
 471
 472         if (hostapd_ioctl(drv, param, blen)) {
 473                 printf("Failed to get encryption.\n");
 474                 ret = -1;
 475         } else {
 476                 os_memcpy(seq, param->u.crypt.seq, 8);
 477         }
 478         os_free(buf);
 479
 480         return ret;
 481 }
 482
 483
 484 static int hostap_ioctl_prism2param(void *priv, int param, int value)
 485 {
 486         struct hostap_driver_data *drv = priv;
 487         struct iwreq iwr;
 488         int *i;
 489
 490         memset(&iwr, 0, sizeof(iwr));
 491         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 492         i = (int *) iwr.u.name;
 493         *i++ = param;
 494         *i++ = value;
 495
 496         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
 497                 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_PRISM2_PARAM]: %s",
 498                            strerror(errno));
 499                 return -1;
 500         }
 501
 502         return 0;
 503 }
 504
 505
 506 static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params)
 507 {
 508         struct hostap_driver_data *drv = priv;
 509         int enabled = params->enabled;
 510
 511         /* enable kernel driver support for IEEE 802.1X */
 512         if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) {
 513                 printf("Could not setup IEEE 802.1X support in kernel driver."
 514                        "\n");
 515                 return -1;
 516         }
 517
 518         if (!enabled)
 519                 return 0;
 520
 521         /* use host driver implementation of encryption to allow
 522          * individual keys and passing plaintext EAPOL frames */
 523         if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) ||
 524             hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) {
 525                 printf("Could not setup host-based encryption in kernel "
 526                        "driver.\n");
 527                 return -1;
 528         }
 529
 530         return 0;
 531 }
 532
 533
 534 static int hostap_set_privacy(void *priv, int enabled)
 535 {
 536         struct hostap_drvier_data *drv = priv;
 537
 538         return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
 539                                         enabled);
 540 }
 541
 542
 543 static int hostap_set_ssid(void *priv, const u8 *buf, int len)
 544 {
 545         struct hostap_driver_data *drv = priv;
 546         struct iwreq iwr;
 547
 548         memset(&iwr, 0, sizeof(iwr));
 549         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 550         iwr.u.essid.flags = 1; /* SSID active */
 551         iwr.u.essid.pointer = (caddr_t) buf;
 552         iwr.u.essid.length = len + 1;
 553
 554         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 555                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID,len=%d]: %s",
 556                            len, strerror(errno));
 557                 return -1;
 558         }
 559
 560         return 0;
 561 }
 562
 563
 564 static int hostap_flush(void *priv)
 565 {
 566         struct hostap_driver_data *drv = priv;
 567         struct prism2_hostapd_param param;
 568
 569         memset(&param, 0, sizeof(param));
 570         param.cmd = PRISM2_HOSTAPD_FLUSH;
 571         return hostapd_ioctl(drv, &param, sizeof(param));
 572 }
 573
 574
 575 static int hostap_read_sta_data(void *priv,
 576                                 struct hostap_sta_driver_data *data,
 577                                 const u8 *addr)
 578 {
 579         struct hostap_driver_data *drv = priv;
 580         char buf[1024], line[128], *pos;
 581         FILE *f;
 582         unsigned long val;
 583
 584         memset(data, 0, sizeof(*data));
 585         snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR,
 586                  drv->iface, MAC2STR(addr));
 587
 588         f = fopen(buf, "r");
 589         if (!f)
 590                 return -1;
 591         /* Need to read proc file with in one piece, so use large enough
 592          * buffer. */
 593         setbuffer(f, buf, sizeof(buf));
 594
 595         while (fgets(line, sizeof(line), f)) {
 596                 pos = strchr(line, '=');
 597                 if (!pos)
 598                         continue;
 599                 *pos++ = '\0';
 600                 val = strtoul(pos, NULL, 10);
 601                 if (strcmp(line, "rx_packets") == 0)
 602                         data->rx_packets = val;
 603                 else if (strcmp(line, "tx_packets") == 0)
 604                         data->tx_packets = val;
 605                 else if (strcmp(line, "rx_bytes") == 0)
 606                         data->rx_bytes = val;
 607                 else if (strcmp(line, "tx_bytes") == 0)
 608                         data->tx_bytes = val;
 609         }
 610
 611         fclose(f);
 612
 613         return 0;
 614 }
 615
 616
 617 static int hostap_sta_add(void *priv, struct hostapd_sta_add_params *params)
 618 {
 619         struct hostap_driver_data *drv = priv;
 620         struct prism2_hostapd_param param;
 621         int tx_supp_rates = 0;
 622         size_t i;
 623
 624 #define WLAN_RATE_1M BIT(0)
 625 #define WLAN_RATE_2M BIT(1)
 626 #define WLAN_RATE_5M5 BIT(2)
 627 #define WLAN_RATE_11M BIT(3)
 628
 629         for (i = 0; i < params->supp_rates_len; i++) {
 630                 if ((params->supp_rates[i] & 0x7f) == 2)
 631                         tx_supp_rates |= WLAN_RATE_1M;
 632                 if ((params->supp_rates[i] & 0x7f) == 4)
 633                         tx_supp_rates |= WLAN_RATE_2M;
 634                 if ((params->supp_rates[i] & 0x7f) == 11)
 635                         tx_supp_rates |= WLAN_RATE_5M5;
 636                 if ((params->supp_rates[i] & 0x7f) == 22)
 637                         tx_supp_rates |= WLAN_RATE_11M;
 638         }
 639
 640         memset(&param, 0, sizeof(param));
 641         param.cmd = PRISM2_HOSTAPD_ADD_STA;
 642         memcpy(param.sta_addr, params->addr, ETH_ALEN);
 643         param.u.add_sta.aid = params->aid;
 644         param.u.add_sta.capability = params->capability;
 645         param.u.add_sta.tx_supp_rates = tx_supp_rates;
 646         return hostapd_ioctl(drv, &param, sizeof(param));
 647 }
 648
 649
 650 static int hostap_sta_remove(void *priv, const u8 *addr)
 651 {
 652         struct hostap_driver_data *drv = priv;
 653         struct prism2_hostapd_param param;
 654
 655         hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED);
 656
 657         memset(&param, 0, sizeof(param));
 658         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
 659         memcpy(param.sta_addr, addr, ETH_ALEN);
 660         if (hostapd_ioctl(drv, &param, sizeof(param))) {
 661                 printf("Could not remove station from kernel driver.\n");
 662                 return -1;
 663         }
 664         return 0;
 665 }
 666
 667
 668 static int hostap_get_inact_sec(void *priv, const u8 *addr)
 669 {
 670         struct hostap_driver_data *drv = priv;
 671         struct prism2_hostapd_param param;
 672
 673         memset(&param, 0, sizeof(param));
 674         param.cmd = PRISM2_HOSTAPD_GET_INFO_STA;
 675         memcpy(param.sta_addr, addr, ETH_ALEN);
 676         if (hostapd_ioctl(drv, &param, sizeof(param))) {
 677                 return -1;
 678         }
 679
 680         return param.u.get_info_sta.inactive_sec;
 681 }
 682
 683
 684 static int hostap_sta_clear_stats(void *priv, const u8 *addr)
 685 {
 686         struct hostap_driver_data *drv = priv;
 687         struct prism2_hostapd_param param;
 688
 689         memset(&param, 0, sizeof(param));
 690         param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS;
 691         memcpy(param.sta_addr, addr, ETH_ALEN);
 692         if (hostapd_ioctl(drv, &param, sizeof(param))) {
 693                 return -1;
 694         }
 695
 696         return 0;
 697 }
 698
 699
 700 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv)
 701 {
 702         struct prism2_hostapd_param *param;
 703         int res;
 704         size_t blen, elem_len;
 705
 706         elem_len = drv->generic_ie_len + drv->wps_ie_len;
 707         blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len;
 708         if (blen < sizeof(*param))
 709                 blen = sizeof(*param);
 710
 711         param = os_zalloc(blen);
 712         if (param == NULL)
 713                 return -1;
 714
 715         param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
 716         param->u.generic_elem.len = elem_len;
 717         if (drv->generic_ie) {
 718                 os_memcpy(param->u.generic_elem.data, drv->generic_ie,
 719                           drv->generic_ie_len);
 720         }
 721         if (drv->wps_ie) {
 722                 os_memcpy(&param->u.generic_elem.data[drv->generic_ie_len],
 723                           drv->wps_ie, drv->wps_ie_len);
 724         }
 725         wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE",
 726                     param->u.generic_elem.data, elem_len);
 727         res = hostapd_ioctl(drv, param, blen);
 728
 729         os_free(param);
 730
 731         return res;
 732 }
 733
 734
 735 static int hostap_set_generic_elem(void *priv,
 736                                    const u8 *elem, size_t elem_len)
 737 {
 738         struct hostap_driver_data *drv = priv;
 739
 740         os_free(drv->generic_ie);
 741         drv->generic_ie = NULL;
 742         drv->generic_ie_len = 0;
 743         if (elem) {
 744                 drv->generic_ie = os_memdup(elem, elem_len);
 745                 if (drv->generic_ie == NULL)
 746                         return -1;
 747                 drv->generic_ie_len = elem_len;
 748         }
 749
 750         return hostapd_ioctl_set_generic_elem(drv);
 751 }
 752
 753
 754 static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon,
 755                                 const struct wpabuf *proberesp,
 756                                 const struct wpabuf *assocresp)
 757 {
 758         struct hostap_driver_data *drv = priv;
 759
 760         /*
 761          * Host AP driver supports only one set of extra IEs, so we need to
 762          * use the Probe Response IEs also for Beacon frames since they include
 763          * more information.
 764          */
 765
 766         os_free(drv->wps_ie);
 767         drv->wps_ie = NULL;
 768         drv->wps_ie_len = 0;
 769         if (proberesp) {
 770                 drv->wps_ie = os_memdup(wpabuf_head(proberesp),
 771                                         wpabuf_len(proberesp));
 772                 if (drv->wps_ie == NULL)
 773                         return -1;
 774                 drv->wps_ie_len = wpabuf_len(proberesp);
 775         }
 776
 777         return hostapd_ioctl_set_generic_elem(drv);
 778 }
 779
 780
 781 static void
 782 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv,
 783                                        char *custom)
 784 {
 785         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
 786
 787         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 788                 char *pos;
 789                 u8 addr[ETH_ALEN];
 790                 pos = strstr(custom, "addr=");
 791                 if (pos == NULL) {
 792                         wpa_printf(MSG_DEBUG,
 793                                    "MLME-MICHAELMICFAILURE.indication "
 794                                    "without sender address ignored");
 795                         return;
 796                 }
 797                 pos += 5;
 798                 if (hwaddr_aton(pos, addr) == 0) {
 799                         union wpa_event_data data;
 800                         os_memset(&data, 0, sizeof(data));
 801                         data.michael_mic_failure.unicast = 1;
 802                         data.michael_mic_failure.src = addr;
 803                         wpa_supplicant_event(drv->hapd,
 804                                              EVENT_MICHAEL_MIC_FAILURE, &data);
 805                 } else {
 806                         wpa_printf(MSG_DEBUG,
 807                                    "MLME-MICHAELMICFAILURE.indication "
 808                                    "with invalid MAC address");
 809                 }
 810         }
 811 }
 812
 813
 814 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv,
 815                                             char *data, unsigned int len)
 816 {
 817         struct iw_event iwe_buf, *iwe = &iwe_buf;
 818         char *pos, *end, *custom, *buf;
 819
 820         pos = data;
 821         end = data + len;
 822
 823         while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
 824                 /* Event data may be unaligned, so make a local, aligned copy
 825                  * before processing. */
 826                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 827                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 828                            iwe->cmd, iwe->len);
 829                 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
 830                         return;
 831
 832                 custom = pos + IW_EV_POINT_LEN;
 833                 if (drv->we_version > 18 &&
 834                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 835                      iwe->cmd == IWEVCUSTOM)) {
 836                         /* WE-19 removed the pointer from struct iw_point */
 837                         char *dpos = (char *) &iwe_buf.u.data.length;
 838                         int dlen = dpos - (char *) &iwe_buf;
 839                         memcpy(dpos, pos + IW_EV_LCP_LEN,
 840                                sizeof(struct iw_event) - dlen);
 841                 } else {
 842                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 843                         custom += IW_EV_POINT_OFF;
 844                 }
 845
 846                 switch (iwe->cmd) {
 847                 case IWEVCUSTOM:
 848                         if (iwe->u.data.length > end - custom)
 849                                 return;
 850                         buf = malloc(iwe->u.data.length + 1);
 851                         if (buf == NULL)
 852                                 return;
 853                         memcpy(buf, custom, iwe->u.data.length);
 854                         buf[iwe->u.data.length] = '\0';
 855                         hostapd_wireless_event_wireless_custom(drv, buf);
 856                         free(buf);
 857                         break;
 858                 }
 859
 860                 pos += iwe->len;
 861         }
 862 }
 863
 864
 865 static void hostapd_wireless_event_rtm_newlink(void *ctx,
 866                                                struct ifinfomsg *ifi,
 867                                                u8 *buf, size_t len)
 868 {
 869         struct hostap_driver_data *drv = ctx;
 870         int attrlen, rta_len;
 871         struct rtattr *attr;
 872
 873         /* TODO: use ifi->ifi_index to filter out wireless events from other
 874          * interfaces */
 875
 876         attrlen = len;
 877         attr = (struct rtattr *) buf;
 878
 879         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 880         while (RTA_OK(attr, attrlen)) {
 881                 if (attr->rta_type == IFLA_WIRELESS) {
 882                         hostapd_wireless_event_wireless(
 883                                 drv, ((char *) attr) + rta_len,
 884                                 attr->rta_len - rta_len);
 885                 }
 886                 attr = RTA_NEXT(attr, attrlen);
 887         }
 888 }
 889
 890
 891 static int hostap_get_we_version(struct hostap_driver_data *drv)
 892 {
 893         struct iw_range *range;
 894         struct iwreq iwr;
 895         int minlen;
 896         size_t buflen;
 897
 898         drv->we_version = 0;
 899
 900         /*
 901          * Use larger buffer than struct iw_range in order to allow the
 902          * structure to grow in the future.
 903          */
 904         buflen = sizeof(struct iw_range) + 500;
 905         range = os_zalloc(buflen);
 906         if (range == NULL)
 907                 return -1;
 908
 909         memset(&iwr, 0, sizeof(iwr));
 910         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 911         iwr.u.data.pointer = (caddr_t) range;
 912         iwr.u.data.length = buflen;
 913
 914         minlen = ((char *) &range->enc_capa) - (char *) range +
 915                 sizeof(range->enc_capa);
 916
 917         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
 918                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s",
 919                            strerror(errno));
 920                 os_free(range);
 921                 return -1;
 922         } else if (iwr.u.data.length >= minlen &&
 923                    range->we_version_compiled >= 18) {
 924                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
 925                            "WE(source)=%d enc_capa=0x%x",
 926                            range->we_version_compiled,
 927                            range->we_version_source,
 928                            range->enc_capa);
 929                 drv->we_version = range->we_version_compiled;
 930         }
 931
 932         free(range);
 933         return 0;
 934 }
 935
 936
 937 static int hostap_wireless_event_init(struct hostap_driver_data *drv)
 938 {
 939         struct netlink_config *cfg;
 940
 941         hostap_get_we_version(drv);
 942
 943         cfg = os_zalloc(sizeof(*cfg));
 944         if (cfg == NULL)
 945                 return -1;
 946         cfg->ctx = drv;
 947         cfg->newlink_cb = hostapd_wireless_event_rtm_newlink;
 948         drv->netlink = netlink_init(cfg);
 949         if (drv->netlink == NULL) {
 950                 os_free(cfg);
 951                 return -1;
 952         }
 953
 954         return 0;
 955 }
 956
 957
 958 static void * hostap_init(struct hostapd_data *hapd,
 959                           struct wpa_init_params *params)
 960 {
 961         struct hostap_driver_data *drv;
 962
 963         drv = os_zalloc(sizeof(struct hostap_driver_data));
 964         if (drv == NULL) {
 965                 printf("Could not allocate memory for hostapd driver data\n");
 966                 return NULL;
 967         }
 968
 969         drv->hapd = hapd;
 970         drv->ioctl_sock = drv->sock = -1;
 971         memcpy(drv->iface, params->ifname, sizeof(drv->iface));
 972
 973         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 974         if (drv->ioctl_sock < 0) {
 975                 wpa_printf(MSG_ERROR, "socket[PF_INET,SOCK_DGRAM]: %s",
 976                            strerror(errno));
 977                 os_free(drv);
 978                 return NULL;
 979         }
 980
 981         if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) {
 982                 wpa_printf(MSG_ERROR,
 983                            "Could not enable hostapd mode for interface %s",
 984                            drv->iface);
 985                 close(drv->ioctl_sock);
 986                 os_free(drv);
 987                 return NULL;
 988         }
 989
 990         if (hostap_init_sockets(drv, params->own_addr) ||
 991             hostap_wireless_event_init(drv)) {
 992                 close(drv->ioctl_sock);
 993                 os_free(drv);
 994                 return NULL;
 995         }
 996
 997         return drv;
 998 }
 999
1000
1001 static void hostap_driver_deinit(void *priv)
1002 {
1003         struct hostap_driver_data *drv = priv;
1004
1005         netlink_deinit(drv->netlink);
1006         (void) hostap_set_iface_flags(drv, 0);
1007         (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0);
1008         (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0);
1009
1010         if (drv->ioctl_sock >= 0)
1011                 close(drv->ioctl_sock);
1012
1013         if (drv->sock >= 0)
1014                 close(drv->sock);
1015
1016         os_free(drv->generic_ie);
1017         os_free(drv->wps_ie);
1018
1019         free(drv);
1020 }
1021
1022
1023 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
1024                              int reason)
1025 {
1026         struct hostap_driver_data *drv = priv;
1027         struct ieee80211_mgmt mgmt;
1028
1029         if (is_broadcast_ether_addr(addr)) {
1030                 /*
1031                  * New Prism2.5/3 STA firmware versions seem to have issues
1032                  * with this broadcast deauth frame. This gets the firmware in
1033                  * odd state where nothing works correctly, so let's skip
1034                  * sending this for the hostap driver.
1035                  */
1036                 return 0;
1037         }
1038
1039         memset(&mgmt, 0, sizeof(mgmt));
1040         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1041                                           WLAN_FC_STYPE_DEAUTH);
1042         memcpy(mgmt.da, addr, ETH_ALEN);
1043         memcpy(mgmt.sa, own_addr, ETH_ALEN);
1044         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
1045         mgmt.u.deauth.reason_code = host_to_le16(reason);
1046         return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN +
1047                                 sizeof(mgmt.u.deauth), 0, 0, NULL, 0);
1048 }
1049
1050
1051 static int hostap_set_freq(void *priv, struct hostapd_freq_params *freq)
1052 {
1053         struct hostap_driver_data *drv = priv;
1054         struct iwreq iwr;
1055
1056         os_memset(&iwr, 0, sizeof(iwr));
1057         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1058         iwr.u.freq.m = freq->channel;
1059         iwr.u.freq.e = 0;
1060
1061         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
1062                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s",
1063                            strerror(errno));
1064                 return -1;
1065         }
1066
1067         return 0;
1068 }
1069
1070
1071 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
1072                                int reason)
1073 {
1074         struct hostap_driver_data *drv = priv;
1075         struct ieee80211_mgmt mgmt;
1076
1077         memset(&mgmt, 0, sizeof(mgmt));
1078         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1079                                           WLAN_FC_STYPE_DISASSOC);
1080         memcpy(mgmt.da, addr, ETH_ALEN);
1081         memcpy(mgmt.sa, own_addr, ETH_ALEN);
1082         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
1083         mgmt.u.disassoc.reason_code = host_to_le16(reason);
1084         return  hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN +
1085                                  sizeof(mgmt.u.disassoc), 0, 0, NULL, 0);
1086 }
1087
1088
1089 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv,
1090                                                             u16 *num_modes,
1091                                                             u16 *flags)
1092 {
1093         struct hostapd_hw_modes *mode;
1094         int i, clen, rlen;
1095         const short chan2freq[14] = {
1096                 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1097                 2447, 2452, 2457, 2462, 2467, 2472, 2484
1098         };
1099
1100         mode = os_zalloc(sizeof(struct hostapd_hw_modes));
1101         if (mode == NULL)
1102                 return NULL;
1103
1104         *num_modes = 1;
1105         *flags = 0;
1106
1107         mode->mode = HOSTAPD_MODE_IEEE80211B;
1108         mode->num_channels = 14;
1109         mode->num_rates = 4;
1110
1111         clen = mode->num_channels * sizeof(struct hostapd_channel_data);
1112         rlen = mode->num_rates * sizeof(int);
1113
1114         mode->channels = os_zalloc(clen);
1115         mode->rates = os_zalloc(rlen);
1116         if (mode->channels == NULL || mode->rates == NULL) {
1117                 os_free(mode->channels);
1118                 os_free(mode->rates);
1119                 os_free(mode);
1120                 return NULL;
1121         }
1122
1123         for (i = 0; i < 14; i++) {
1124                 mode->channels[i].chan = i + 1;
1125                 mode->channels[i].freq = chan2freq[i];
1126                 /* TODO: Get allowed channel list from the driver */
1127                 if (i >= 11)
1128                         mode->channels[i].flag = HOSTAPD_CHAN_DISABLED;
1129         }
1130
1131         mode->rates[0] = 10;
1132         mode->rates[1] = 20;
1133         mode->rates[2] = 55;
1134         mode->rates[3] = 110;
1135
1136         return mode;
1137 }
1138
1139
1140 static void wpa_driver_hostap_poll_client(void *priv, const u8 *own_addr,
1141                                           const u8 *addr, int qos)
1142 {
1143         struct ieee80211_hdr hdr;
1144
1145         os_memset(&hdr, 0, sizeof(hdr));
1146
1147         /*
1148          * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
1149          * but it is apparently not retried so TX Exc events
1150          * are not received for it.
1151          * This is the reason the driver overrides the default
1152          * handling.
1153          */
1154         hdr.frame_control = IEEE80211_FC(WLAN_FC_TYPE_DATA,
1155                                          WLAN_FC_STYPE_DATA);
1156
1157         hdr.frame_control |=
1158                 host_to_le16(WLAN_FC_FROMDS);
1159         os_memcpy(hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN);
1160         os_memcpy(hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
1161         os_memcpy(hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
1162
1163         hostap_send_mlme(priv, (u8 *)&hdr, sizeof(hdr), 0, 0, NULL, 0);
1164 }
1165
1166
1167 const struct wpa_driver_ops wpa_driver_hostap_ops = {
1168         .name = "hostap",
1169         .desc = "Host AP driver (Intersil Prism2/2.5/3)",
1170         .set_key = wpa_driver_hostap_set_key,
1171         .hapd_init = hostap_init,
1172         .hapd_deinit = hostap_driver_deinit,
1173         .set_ieee8021x = hostap_set_ieee8021x,
1174         .set_privacy = hostap_set_privacy,
1175         .get_seqnum = hostap_get_seqnum,
1176         .flush = hostap_flush,
1177         .set_generic_elem = hostap_set_generic_elem,
1178         .read_sta_data = hostap_read_sta_data,
1179         .hapd_send_eapol = hostap_send_eapol,
1180         .sta_set_flags = hostap_sta_set_flags,
1181         .sta_deauth = hostap_sta_deauth,
1182         .sta_disassoc = hostap_sta_disassoc,
1183         .sta_remove = hostap_sta_remove,
1184         .hapd_set_ssid = hostap_set_ssid,
1185         .send_mlme = hostap_send_mlme,
1186         .sta_add = hostap_sta_add,
1187         .get_inact_sec = hostap_get_inact_sec,
1188         .sta_clear_stats = hostap_sta_clear_stats,
1189         .get_hw_feature_data = hostap_get_hw_feature_data,
1190         .set_ap_wps_ie = hostap_set_ap_wps_ie,
1191         .set_freq = hostap_set_freq,
1192         .poll_client = wpa_driver_hostap_poll_client,
1193 };