dist/wpa/hostapd/driver_hostap.c

   1 /*
   2  * hostapd / Kernel driver communication with Linux Host AP driver
   3  * Copyright (c) 2002-2007, 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
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17
  18 #ifdef USE_KERNEL_HEADERS
  19 /* compat-wireless does not include linux/compiler.h to define __user, so
  20  * define it here */
  21 #ifndef __user
  22 #define __user
  23 #endif /* __user */
  24 #include <asm/types.h>
  25 #include <linux/if_packet.h>
  26 #include <linux/if_ether.h>   /* The L2 protocols */
  27 #include <linux/if_arp.h>
  28 #include <linux/wireless.h>
  29 #else /* USE_KERNEL_HEADERS */
  30 #include <net/if_arp.h>
  31 #include <netpacket/packet.h>
  32 #include "wireless_copy.h"
  33 #endif /* USE_KERNEL_HEADERS */
  34
  35 #include "hostapd.h"
  36 #include "driver.h"
  37 #include "ieee802_1x.h"
  38 #include "eloop.h"
  39 #include "priv_netlink.h"
  40 #include "ieee802_11.h"
  41 #include "sta_info.h"
  42 #include "hostap_common.h"
  43 #include "hw_features.h"
  44
  45
  46 struct hostap_driver_data {
  47         struct hostapd_data *hapd;
  48
  49         char iface[IFNAMSIZ + 1];
  50         int sock; /* raw packet socket for driver access */
  51         int ioctl_sock; /* socket for ioctl() use */
  52         int wext_sock; /* socket for wireless events */
  53
  54         int we_version;
  55
  56         u8 *generic_ie;
  57         size_t generic_ie_len;
  58 };
  59
  60
  61 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
  62                          int len);
  63 static int hostap_set_iface_flags(void *priv, int dev_up);
  64
  65 static void handle_data(struct hostapd_data *hapd, u8 *buf, size_t len,
  66                         u16 stype)
  67 {
  68         struct ieee80211_hdr *hdr;
  69         u16 fc, ethertype;
  70         u8 *pos, *sa;
  71         size_t left;
  72         struct sta_info *sta;
  73
  74         if (len < sizeof(struct ieee80211_hdr))
  75                 return;
  76
  77         hdr = (struct ieee80211_hdr *) buf;
  78         fc = le_to_host16(hdr->frame_control);
  79
  80         if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) {
  81                 printf("Not ToDS data frame (fc=0x%04x)\n", fc);
  82                 return;
  83         }
  84
  85         sa = hdr->addr2;
  86         sta = ap_get_sta(hapd, sa);
  87         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
  88                 printf("Data frame from not associated STA " MACSTR "\n",
  89                        MAC2STR(sa));
  90                 if (sta && (sta->flags & WLAN_STA_AUTH))
  91                         hostapd_sta_disassoc(
  92                                 hapd, sa,
  93                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
  94                 else
  95                         hostapd_sta_deauth(
  96                                 hapd, sa,
  97                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
  98                 return;
  99         }
 100
 101         pos = (u8 *) (hdr + 1);
 102         left = len - sizeof(*hdr);
 103
 104         if (left < sizeof(rfc1042_header)) {
 105                 printf("Too short data frame\n");
 106                 return;
 107         }
 108
 109         if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) {
 110                 printf("Data frame with no RFC1042 header\n");
 111                 return;
 112         }
 113         pos += sizeof(rfc1042_header);
 114         left -= sizeof(rfc1042_header);
 115
 116         if (left < 2) {
 117                 printf("No ethertype in data frame\n");
 118                 return;
 119         }
 120
 121         ethertype = WPA_GET_BE16(pos);
 122         pos += 2;
 123         left -= 2;
 124         switch (ethertype) {
 125         case ETH_P_PAE:
 126                 ieee802_1x_receive(hapd, sa, pos, left);
 127                 break;
 128
 129         default:
 130                 printf("Unknown ethertype 0x%04x in data frame\n", ethertype);
 131                 break;
 132         }
 133 }
 134
 135
 136 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
 137                                int ok)
 138 {
 139         struct ieee80211_hdr *hdr;
 140         u16 fc, type, stype;
 141         struct sta_info *sta;
 142
 143         hdr = (struct ieee80211_hdr *) buf;
 144         fc = le_to_host16(hdr->frame_control);
 145
 146         type = WLAN_FC_GET_TYPE(fc);
 147         stype = WLAN_FC_GET_STYPE(fc);
 148
 149         switch (type) {
 150         case WLAN_FC_TYPE_MGMT:
 151                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
 152                            ok ? "ACK" : "fail");
 153                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
 154                 break;
 155         case WLAN_FC_TYPE_CTRL:
 156                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
 157                            ok ? "ACK" : "fail");
 158                 break;
 159         case WLAN_FC_TYPE_DATA:
 160                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
 161                            ok ? "ACK" : "fail");
 162                 sta = ap_get_sta(hapd, hdr->addr1);
 163                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
 164                         wpa_printf(MSG_DEBUG, "STA " MACSTR
 165                                    " %s pending activity poll",
 166                                    MAC2STR(sta->addr),
 167                                    ok ? "ACKed" : "did not ACK");
 168                         if (ok)
 169                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
 170                 }
 171                 if (sta)
 172                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
 173                 break;
 174         default:
 175                 printf("unknown TX callback frame type %d\n", type);
 176                 break;
 177         }
 178 }
 179
 180
 181 static void handle_frame(struct hostapd_data *hapd, u8 *buf, size_t len)
 182 {
 183         struct ieee80211_hdr *hdr;
 184         u16 fc, extra_len, type, stype;
 185         unsigned char *extra = NULL;
 186         size_t data_len = len;
 187         int ver;
 188
 189         /* PSPOLL is only 16 bytes, but driver does not (at least yet) pass
 190          * these to user space */
 191         if (len < 24) {
 192                 wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)",
 193                            (unsigned long) len);
 194                 return;
 195         }
 196
 197         hdr = (struct ieee80211_hdr *) buf;
 198         fc = le_to_host16(hdr->frame_control);
 199         type = WLAN_FC_GET_TYPE(fc);
 200         stype = WLAN_FC_GET_STYPE(fc);
 201
 202         if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) {
 203                 wpa_hexdump(MSG_MSGDUMP, "Received management frame",
 204                             buf, len);
 205         }
 206
 207         ver = fc & WLAN_FC_PVER;
 208
 209         /* protocol version 3 is reserved for indicating extra data after the
 210          * payload, version 2 for indicating ACKed frame (TX callbacks), and
 211          * version 1 for indicating failed frame (no ACK, TX callbacks) */
 212         if (ver == 3) {
 213                 u8 *pos = buf + len - 2;
 214                 extra_len = WPA_GET_LE16(pos);
 215                 printf("extra data in frame (elen=%d)\n", extra_len);
 216                 if ((size_t) extra_len + 2 > len) {
 217                         printf("  extra data overflow\n");
 218                         return;
 219                 }
 220                 len -= extra_len + 2;
 221                 extra = buf + len;
 222         } else if (ver == 1 || ver == 2) {
 223                 handle_tx_callback(hapd, buf, data_len, ver == 2 ? 1 : 0);
 224                 return;
 225         } else if (ver != 0) {
 226                 printf("unknown protocol version %d\n", ver);
 227                 return;
 228         }
 229
 230         switch (type) {
 231         case WLAN_FC_TYPE_MGMT:
 232                 if (stype != WLAN_FC_STYPE_BEACON)
 233                         wpa_printf(MSG_MSGDUMP, "MGMT");
 234                 ieee802_11_mgmt(hapd, buf, data_len, stype, NULL);
 235                 break;
 236         case WLAN_FC_TYPE_CTRL:
 237                 wpa_printf(MSG_DEBUG, "CTRL");
 238                 break;
 239         case WLAN_FC_TYPE_DATA:
 240                 wpa_printf(MSG_DEBUG, "DATA");
 241                 handle_data(hapd, buf, data_len, stype);
 242                 break;
 243         default:
 244                 wpa_printf(MSG_DEBUG, "unknown frame type %d", type);
 245                 break;
 246         }
 247 }
 248
 249
 250 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
 251 {
 252         struct hostapd_data *hapd = (struct hostapd_data *) eloop_ctx;
 253         int len;
 254         unsigned char buf[3000];
 255
 256         len = recv(sock, buf, sizeof(buf), 0);
 257         if (len < 0) {
 258                 perror("recv");
 259                 return;
 260         }
 261
 262         handle_frame(hapd, buf, len);
 263 }
 264
 265
 266 static int hostap_init_sockets(struct hostap_driver_data *drv)
 267 {
 268         struct ifreq ifr;
 269         struct sockaddr_ll addr;
 270
 271         drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 272         if (drv->sock < 0) {
 273                 perror("socket[PF_PACKET,SOCK_RAW]");
 274                 return -1;
 275         }
 276
 277         if (eloop_register_read_sock(drv->sock, handle_read, drv->hapd, NULL))
 278         {
 279                 printf("Could not register read socket\n");
 280                 return -1;
 281         }
 282
 283         memset(&ifr, 0, sizeof(ifr));
 284         snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", drv->iface);
 285         if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
 286                 perror("ioctl(SIOCGIFINDEX)");
 287                 return -1;
 288         }
 289
 290         if (hostap_set_iface_flags(drv, 1)) {
 291                 return -1;
 292         }
 293
 294         memset(&addr, 0, sizeof(addr));
 295         addr.sll_family = AF_PACKET;
 296         addr.sll_ifindex = ifr.ifr_ifindex;
 297         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
 298                    addr.sll_ifindex);
 299
 300         if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 301                 perror("bind");
 302                 return -1;
 303         }
 304
 305         memset(&ifr, 0, sizeof(ifr));
 306         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
 307         if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
 308                 perror("ioctl(SIOCGIFHWADDR)");
 309                 return -1;
 310         }
 311
 312         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 313                 printf("Invalid HW-addr family 0x%04x\n",
 314                        ifr.ifr_hwaddr.sa_family);
 315                 return -1;
 316         }
 317         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 318
 319         return 0;
 320 }
 321
 322
 323 static int hostap_send_mgmt_frame(void *priv, const void *msg, size_t len,
 324                                   int flags)
 325 {
 326         struct hostap_driver_data *drv = priv;
 327
 328         return send(drv->sock, msg, len, flags);
 329 }
 330
 331
 332 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data,
 333                              size_t data_len, int encrypt, const u8 *own_addr)
 334 {
 335         struct hostap_driver_data *drv = priv;
 336         struct ieee80211_hdr *hdr;
 337         size_t len;
 338         u8 *pos;
 339         int res;
 340
 341         len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len;
 342         hdr = os_zalloc(len);
 343         if (hdr == NULL) {
 344                 printf("malloc() failed for hostapd_send_data(len=%lu)\n",
 345                        (unsigned long) len);
 346                 return -1;
 347         }
 348
 349         hdr->frame_control =
 350                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 351         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 352         /* Request TX callback */
 353         hdr->frame_control |= host_to_le16(BIT(1));
 354         if (encrypt)
 355                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 356         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 357         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 358         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 359
 360         pos = (u8 *) (hdr + 1);
 361         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 362         pos += sizeof(rfc1042_header);
 363         *((u16 *) pos) = htons(ETH_P_PAE);
 364         pos += 2;
 365         memcpy(pos, data, data_len);
 366
 367         res = hostap_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
 368         free(hdr);
 369
 370         if (res < 0) {
 371                 perror("hostapd_send_eapol: send");
 372                 printf("hostapd_send_eapol - packet len: %lu - failed\n",
 373                        (unsigned long) len);
 374         }
 375
 376         return res;
 377 }
 378
 379
 380 static int hostap_sta_set_flags(void *priv, const u8 *addr,
 381                                 int total_flags, int flags_or, int flags_and)
 382 {
 383         struct hostap_driver_data *drv = priv;
 384         struct prism2_hostapd_param param;
 385
 386         memset(&param, 0, sizeof(param));
 387         param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA;
 388         memcpy(param.sta_addr, addr, ETH_ALEN);
 389         param.u.set_flags_sta.flags_or = flags_or;
 390         param.u.set_flags_sta.flags_and = flags_and;
 391         return hostapd_ioctl(drv, &param, sizeof(param));
 392 }
 393
 394
 395 static int hostap_set_iface_flags(void *priv, int dev_up)
 396 {
 397         struct hostap_driver_data *drv = priv;
 398         struct ifreq ifr;
 399
 400         if (drv->ioctl_sock < 0)
 401                 return -1;
 402
 403         memset(&ifr, 0, sizeof(ifr));
 404         snprintf(ifr.ifr_name, IFNAMSIZ, "%sap", drv->iface);
 405
 406         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 407                 perror("ioctl[SIOCGIFFLAGS]");
 408                 return -1;
 409         }
 410
 411         if (dev_up)
 412                 ifr.ifr_flags |= IFF_UP;
 413         else
 414                 ifr.ifr_flags &= ~IFF_UP;
 415
 416         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 417                 perror("ioctl[SIOCSIFFLAGS]");
 418                 return -1;
 419         }
 420
 421         if (dev_up) {
 422                 memset(&ifr, 0, sizeof(ifr));
 423                 snprintf(ifr.ifr_name, IFNAMSIZ, "%sap", drv->iface);
 424                 ifr.ifr_mtu = HOSTAPD_MTU;
 425                 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
 426                         perror("ioctl[SIOCSIFMTU]");
 427                         printf("Setting MTU failed - trying to survive with "
 428                                "current value\n");
 429                 }
 430         }
 431
 432         return 0;
 433 }
 434
 435
 436 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
 437                          int len)
 438 {
 439         struct hostap_driver_data *drv = priv;
 440         struct iwreq iwr;
 441
 442         memset(&iwr, 0, sizeof(iwr));
 443         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 444         iwr.u.data.pointer = (caddr_t) param;
 445         iwr.u.data.length = len;
 446
 447         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
 448                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
 449                 return -1;
 450         }
 451
 452         return 0;
 453 }
 454
 455
 456 static int hostap_set_encryption(const char *ifname, void *priv,
 457                                  const char *alg, const u8 *addr,
 458                                  int idx, const u8 *key, size_t key_len,
 459                                  int txkey)
 460 {
 461         struct hostap_driver_data *drv = priv;
 462         struct prism2_hostapd_param *param;
 463         u8 *buf;
 464         size_t blen;
 465         int ret = 0;
 466
 467         blen = sizeof(*param) + key_len;
 468         buf = os_zalloc(blen);
 469         if (buf == NULL)
 470                 return -1;
 471
 472         param = (struct prism2_hostapd_param *) buf;
 473         param->cmd = PRISM2_SET_ENCRYPTION;
 474         if (addr == NULL)
 475                 memset(param->sta_addr, 0xff, ETH_ALEN);
 476         else
 477                 memcpy(param->sta_addr, addr, ETH_ALEN);
 478         os_strlcpy((char *) param->u.crypt.alg, alg,
 479                    HOSTAP_CRYPT_ALG_NAME_LEN);
 480         param->u.crypt.flags = txkey ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
 481         param->u.crypt.idx = idx;
 482         param->u.crypt.key_len = key_len;
 483         memcpy((u8 *) (param + 1), key, key_len);
 484
 485         if (hostapd_ioctl(drv, param, blen)) {
 486                 printf("Failed to set encryption.\n");
 487                 ret = -1;
 488         }
 489         free(buf);
 490
 491         return ret;
 492 }
 493
 494
 495 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr,
 496                              int idx, u8 *seq)
 497 {
 498         struct hostap_driver_data *drv = priv;
 499         struct prism2_hostapd_param *param;
 500         u8 *buf;
 501         size_t blen;
 502         int ret = 0;
 503
 504         blen = sizeof(*param) + 32;
 505         buf = os_zalloc(blen);
 506         if (buf == NULL)
 507                 return -1;
 508
 509         param = (struct prism2_hostapd_param *) buf;
 510         param->cmd = PRISM2_GET_ENCRYPTION;
 511         if (addr == NULL)
 512                 memset(param->sta_addr, 0xff, ETH_ALEN);
 513         else
 514                 memcpy(param->sta_addr, addr, ETH_ALEN);
 515         param->u.crypt.idx = idx;
 516
 517         if (hostapd_ioctl(drv, param, blen)) {
 518                 printf("Failed to get encryption.\n");
 519                 ret = -1;
 520         } else {
 521                 memcpy(seq, param->u.crypt.seq, 8);
 522         }
 523         free(buf);
 524
 525         return ret;
 526 }
 527
 528
 529 static int hostap_ioctl_prism2param(void *priv, int param, int value)
 530 {
 531         struct hostap_driver_data *drv = priv;
 532         struct iwreq iwr;
 533         int *i;
 534
 535         memset(&iwr, 0, sizeof(iwr));
 536         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 537         i = (int *) iwr.u.name;
 538         *i++ = param;
 539         *i++ = value;
 540
 541         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
 542                 perror("ioctl[PRISM2_IOCTL_PRISM2_PARAM]");
 543                 return -1;
 544         }
 545
 546         return 0;
 547 }
 548
 549
 550 static int hostap_set_ieee8021x(const char *ifname, void *priv, int enabled)
 551 {
 552         struct hostap_driver_data *drv = priv;
 553
 554         /* enable kernel driver support for IEEE 802.1X */
 555         if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) {
 556                 printf("Could not setup IEEE 802.1X support in kernel driver."
 557                        "\n");
 558                 return -1;
 559         }
 560
 561         if (!enabled)
 562                 return 0;
 563
 564         /* use host driver implementation of encryption to allow
 565          * individual keys and passing plaintext EAPOL frames */
 566         if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) ||
 567             hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) {
 568                 printf("Could not setup host-based encryption in kernel "
 569                        "driver.\n");
 570                 return -1;
 571         }
 572
 573         return 0;
 574 }
 575
 576
 577 static int hostap_set_privacy(const char *ifname, void *priv, int enabled)
 578 {
 579         struct hostap_drvier_data *drv = priv;
 580
 581         return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
 582                                         enabled);
 583 }
 584
 585
 586 static int hostap_set_ssid(const char *ifname, void *priv, const u8 *buf,
 587                            int len)
 588 {
 589         struct hostap_driver_data *drv = priv;
 590         struct iwreq iwr;
 591
 592         memset(&iwr, 0, sizeof(iwr));
 593         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 594         iwr.u.essid.flags = 1; /* SSID active */
 595         iwr.u.essid.pointer = (caddr_t) buf;
 596         iwr.u.essid.length = len + 1;
 597
 598         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 599                 perror("ioctl[SIOCSIWESSID]");
 600                 printf("len=%d\n", len);
 601                 return -1;
 602         }
 603
 604         return 0;
 605 }
 606
 607
 608 static int hostap_flush(void *priv)
 609 {
 610         struct hostap_driver_data *drv = priv;
 611         struct prism2_hostapd_param param;
 612
 613         memset(&param, 0, sizeof(param));
 614         param.cmd = PRISM2_HOSTAPD_FLUSH;
 615         return hostapd_ioctl(drv, &param, sizeof(param));
 616 }
 617
 618
 619 static int hostap_read_sta_data(void *priv,
 620                                 struct hostap_sta_driver_data *data,
 621                                 const u8 *addr)
 622 {
 623         struct hostap_driver_data *drv = priv;
 624         char buf[1024], line[128], *pos;
 625         FILE *f;
 626         unsigned long val;
 627
 628         memset(data, 0, sizeof(*data));
 629         snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR,
 630                  drv->iface, MAC2STR(addr));
 631
 632         f = fopen(buf, "r");
 633         if (!f)
 634                 return -1;
 635         /* Need to read proc file with in one piece, so use large enough
 636          * buffer. */
 637         setbuffer(f, buf, sizeof(buf));
 638
 639         while (fgets(line, sizeof(line), f)) {
 640                 pos = strchr(line, '=');
 641                 if (!pos)
 642                         continue;
 643                 *pos++ = '\0';
 644                 val = strtoul(pos, NULL, 10);
 645                 if (strcmp(line, "rx_packets") == 0)
 646                         data->rx_packets = val;
 647                 else if (strcmp(line, "tx_packets") == 0)
 648                         data->tx_packets = val;
 649                 else if (strcmp(line, "rx_bytes") == 0)
 650                         data->rx_bytes = val;
 651                 else if (strcmp(line, "tx_bytes") == 0)
 652                         data->tx_bytes = val;
 653         }
 654
 655         fclose(f);
 656
 657         return 0;
 658 }
 659
 660
 661 static int hostap_sta_add(const char *ifname, void *priv, const u8 *addr,
 662                           u16 aid, u16 capability, u8 *supp_rates,
 663                           size_t supp_rates_len, int flags,
 664                           u16 listen_interval)
 665 {
 666         struct hostap_driver_data *drv = priv;
 667         struct prism2_hostapd_param param;
 668         int tx_supp_rates = 0;
 669         size_t i;
 670
 671 #define WLAN_RATE_1M BIT(0)
 672 #define WLAN_RATE_2M BIT(1)
 673 #define WLAN_RATE_5M5 BIT(2)
 674 #define WLAN_RATE_11M BIT(3)
 675
 676         for (i = 0; i < supp_rates_len; i++) {
 677                 if ((supp_rates[i] & 0x7f) == 2)
 678                         tx_supp_rates |= WLAN_RATE_1M;
 679                 if ((supp_rates[i] & 0x7f) == 4)
 680                         tx_supp_rates |= WLAN_RATE_2M;
 681                 if ((supp_rates[i] & 0x7f) == 11)
 682                         tx_supp_rates |= WLAN_RATE_5M5;
 683                 if ((supp_rates[i] & 0x7f) == 22)
 684                         tx_supp_rates |= WLAN_RATE_11M;
 685         }
 686
 687         memset(&param, 0, sizeof(param));
 688         param.cmd = PRISM2_HOSTAPD_ADD_STA;
 689         memcpy(param.sta_addr, addr, ETH_ALEN);
 690         param.u.add_sta.aid = aid;
 691         param.u.add_sta.capability = capability;
 692         param.u.add_sta.tx_supp_rates = tx_supp_rates;
 693         return hostapd_ioctl(drv, &param, sizeof(param));
 694 }
 695
 696
 697 static int hostap_sta_remove(void *priv, const u8 *addr)
 698 {
 699         struct hostap_driver_data *drv = priv;
 700         struct prism2_hostapd_param param;
 701
 702         hostap_sta_set_flags(drv, addr, 0, 0, ~WLAN_STA_AUTHORIZED);
 703
 704         memset(&param, 0, sizeof(param));
 705         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
 706         memcpy(param.sta_addr, addr, ETH_ALEN);
 707         if (hostapd_ioctl(drv, &param, sizeof(param))) {
 708                 printf("Could not remove station from kernel driver.\n");
 709                 return -1;
 710         }
 711         return 0;
 712 }
 713
 714
 715 static int hostap_get_inact_sec(void *priv, const u8 *addr)
 716 {
 717         struct hostap_driver_data *drv = priv;
 718         struct prism2_hostapd_param param;
 719
 720         memset(&param, 0, sizeof(param));
 721         param.cmd = PRISM2_HOSTAPD_GET_INFO_STA;
 722         memcpy(param.sta_addr, addr, ETH_ALEN);
 723         if (hostapd_ioctl(drv, &param, sizeof(param))) {
 724                 return -1;
 725         }
 726
 727         return param.u.get_info_sta.inactive_sec;
 728 }
 729
 730
 731 static int hostap_sta_clear_stats(void *priv, const u8 *addr)
 732 {
 733         struct hostap_driver_data *drv = priv;
 734         struct prism2_hostapd_param param;
 735
 736         memset(&param, 0, sizeof(param));
 737         param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS;
 738         memcpy(param.sta_addr, addr, ETH_ALEN);
 739         if (hostapd_ioctl(drv, &param, sizeof(param))) {
 740                 return -1;
 741         }
 742
 743         return 0;
 744 }
 745
 746
 747 static int hostap_set_assoc_ap(void *priv, const u8 *addr)
 748 {
 749         struct hostap_driver_data *drv = priv;
 750         struct prism2_hostapd_param param;
 751
 752         memset(&param, 0, sizeof(param));
 753         param.cmd = PRISM2_HOSTAPD_SET_ASSOC_AP_ADDR;
 754         memcpy(param.sta_addr, addr, ETH_ALEN);
 755         if (hostapd_ioctl(drv, &param, sizeof(param)))
 756                 return -1;
 757
 758         return 0;
 759 }
 760
 761
 762 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv)
 763 {
 764         struct prism2_hostapd_param *param;
 765         int res;
 766         size_t blen, elem_len;
 767
 768         elem_len = drv->generic_ie_len;
 769         blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len;
 770         if (blen < sizeof(*param))
 771                 blen = sizeof(*param);
 772
 773         param = os_zalloc(blen);
 774         if (param == NULL)
 775                 return -1;
 776
 777         param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
 778         param->u.generic_elem.len = elem_len;
 779         if (drv->generic_ie) {
 780                 os_memcpy(param->u.generic_elem.data, drv->generic_ie,
 781                           drv->generic_ie_len);
 782         }
 783         wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE",
 784                     param->u.generic_elem.data, elem_len);
 785         res = hostapd_ioctl(drv, param, blen);
 786
 787         os_free(param);
 788
 789         return res;
 790 }
 791
 792
 793 static int hostap_set_generic_elem(const char *ifname, void *priv,
 794                                    const u8 *elem, size_t elem_len)
 795 {
 796         struct hostap_driver_data *drv = priv;
 797
 798         os_free(drv->generic_ie);
 799         drv->generic_ie = NULL;
 800         drv->generic_ie_len = 0;
 801         if (elem) {
 802                 drv->generic_ie = os_malloc(elem_len);
 803                 if (drv->generic_ie == NULL)
 804                         return -1;
 805                 os_memcpy(drv->generic_ie, elem, elem_len);
 806                 drv->generic_ie_len = elem_len;
 807         }
 808
 809         return hostapd_ioctl_set_generic_elem(drv);
 810 }
 811
 812
 813 static void
 814 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv,
 815                                        char *custom)
 816 {
 817         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
 818
 819         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 820                 char *pos;
 821                 u8 addr[ETH_ALEN];
 822                 pos = strstr(custom, "addr=");
 823                 if (pos == NULL) {
 824                         wpa_printf(MSG_DEBUG,
 825                                    "MLME-MICHAELMICFAILURE.indication "
 826                                    "without sender address ignored");
 827                         return;
 828                 }
 829                 pos += 5;
 830                 if (hwaddr_aton(pos, addr) == 0) {
 831                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
 832                 } else {
 833                         wpa_printf(MSG_DEBUG,
 834                                    "MLME-MICHAELMICFAILURE.indication "
 835                                    "with invalid MAC address");
 836                 }
 837         }
 838 }
 839
 840
 841 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv,
 842                                             char *data, int len)
 843 {
 844         struct iw_event iwe_buf, *iwe = &iwe_buf;
 845         char *pos, *end, *custom, *buf;
 846
 847         pos = data;
 848         end = data + len;
 849
 850         while (pos + IW_EV_LCP_LEN <= end) {
 851                 /* Event data may be unaligned, so make a local, aligned copy
 852                  * before processing. */
 853                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 854                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 855                            iwe->cmd, iwe->len);
 856                 if (iwe->len <= IW_EV_LCP_LEN)
 857                         return;
 858
 859                 custom = pos + IW_EV_POINT_LEN;
 860                 if (drv->we_version > 18 &&
 861                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 862                      iwe->cmd == IWEVCUSTOM)) {
 863                         /* WE-19 removed the pointer from struct iw_point */
 864                         char *dpos = (char *) &iwe_buf.u.data.length;
 865                         int dlen = dpos - (char *) &iwe_buf;
 866                         memcpy(dpos, pos + IW_EV_LCP_LEN,
 867                                sizeof(struct iw_event) - dlen);
 868                 } else {
 869                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 870                         custom += IW_EV_POINT_OFF;
 871                 }
 872
 873                 switch (iwe->cmd) {
 874                 case IWEVCUSTOM:
 875                         if (custom + iwe->u.data.length > end)
 876                                 return;
 877                         buf = malloc(iwe->u.data.length + 1);
 878                         if (buf == NULL)
 879                                 return;
 880                         memcpy(buf, custom, iwe->u.data.length);
 881                         buf[iwe->u.data.length] = '\0';
 882                         hostapd_wireless_event_wireless_custom(drv, buf);
 883                         free(buf);
 884                         break;
 885                 }
 886
 887                 pos += iwe->len;
 888         }
 889 }
 890
 891
 892 static void hostapd_wireless_event_rtm_newlink(struct hostap_driver_data *drv,
 893                                                struct nlmsghdr *h, int len)
 894 {
 895         struct ifinfomsg *ifi;
 896         int attrlen, nlmsg_len, rta_len;
 897         struct rtattr * attr;
 898
 899         if (len < (int) sizeof(*ifi))
 900                 return;
 901
 902         ifi = NLMSG_DATA(h);
 903
 904         /* TODO: use ifi->ifi_index to filter out wireless events from other
 905          * interfaces */
 906
 907         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 908
 909         attrlen = h->nlmsg_len - nlmsg_len;
 910         if (attrlen < 0)
 911                 return;
 912
 913         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 914
 915         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 916         while (RTA_OK(attr, attrlen)) {
 917                 if (attr->rta_type == IFLA_WIRELESS) {
 918                         hostapd_wireless_event_wireless(
 919                                 drv, ((char *) attr) + rta_len,
 920                                 attr->rta_len - rta_len);
 921                 }
 922                 attr = RTA_NEXT(attr, attrlen);
 923         }
 924 }
 925
 926
 927 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
 928                                            void *sock_ctx)
 929 {
 930         char buf[256];
 931         int left;
 932         struct sockaddr_nl from;
 933         socklen_t fromlen;
 934         struct nlmsghdr *h;
 935         struct hostap_driver_data *drv = eloop_ctx;
 936
 937         fromlen = sizeof(from);
 938         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 939                         (struct sockaddr *) &from, &fromlen);
 940         if (left < 0) {
 941                 if (errno != EINTR && errno != EAGAIN)
 942                         perror("recvfrom(netlink)");
 943                 return;
 944         }
 945
 946         h = (struct nlmsghdr *) buf;
 947         while (left >= (int) sizeof(*h)) {
 948                 int len, plen;
 949
 950                 len = h->nlmsg_len;
 951                 plen = len - sizeof(*h);
 952                 if (len > left || plen < 0) {
 953                         printf("Malformed netlink message: "
 954                                "len=%d left=%d plen=%d\n",
 955                                len, left, plen);
 956                         break;
 957                 }
 958
 959                 switch (h->nlmsg_type) {
 960                 case RTM_NEWLINK:
 961                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
 962                         break;
 963                 }
 964
 965                 len = NLMSG_ALIGN(len);
 966                 left -= len;
 967                 h = (struct nlmsghdr *) ((char *) h + len);
 968         }
 969
 970         if (left > 0) {
 971                 printf("%d extra bytes in the end of netlink message\n", left);
 972         }
 973 }
 974
 975
 976 static int hostap_get_we_version(struct hostap_driver_data *drv)
 977 {
 978         struct iw_range *range;
 979         struct iwreq iwr;
 980         int minlen;
 981         size_t buflen;
 982
 983         drv->we_version = 0;
 984
 985         /*
 986          * Use larger buffer than struct iw_range in order to allow the
 987          * structure to grow in the future.
 988          */
 989         buflen = sizeof(struct iw_range) + 500;
 990         range = os_zalloc(buflen);
 991         if (range == NULL)
 992                 return -1;
 993
 994         memset(&iwr, 0, sizeof(iwr));
 995         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 996         iwr.u.data.pointer = (caddr_t) range;
 997         iwr.u.data.length = buflen;
 998
 999         minlen = ((char *) &range->enc_capa) - (char *) range +
1000                 sizeof(range->enc_capa);
1001
1002         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1003                 perror("ioctl[SIOCGIWRANGE]");
1004                 free(range);
1005                 return -1;
1006         } else if (iwr.u.data.length >= minlen &&
1007                    range->we_version_compiled >= 18) {
1008                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1009                            "WE(source)=%d enc_capa=0x%x",
1010                            range->we_version_compiled,
1011                            range->we_version_source,
1012                            range->enc_capa);
1013                 drv->we_version = range->we_version_compiled;
1014         }
1015
1016         free(range);
1017         return 0;
1018 }
1019
1020
1021 static int hostap_wireless_event_init(void *priv)
1022 {
1023         struct hostap_driver_data *drv = priv;
1024         int s;
1025         struct sockaddr_nl local;
1026
1027         hostap_get_we_version(drv);
1028
1029         drv->wext_sock = -1;
1030
1031         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1032         if (s < 0) {
1033                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1034                 return -1;
1035         }
1036
1037         memset(&local, 0, sizeof(local));
1038         local.nl_family = AF_NETLINK;
1039         local.nl_groups = RTMGRP_LINK;
1040         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1041                 perror("bind(netlink)");
1042                 close(s);
1043                 return -1;
1044         }
1045
1046         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
1047                                  NULL);
1048         drv->wext_sock = s;
1049
1050         return 0;
1051 }
1052
1053
1054 static void hostap_wireless_event_deinit(void *priv)
1055 {
1056         struct hostap_driver_data *drv = priv;
1057         if (drv->wext_sock < 0)
1058                 return;
1059         eloop_unregister_read_sock(drv->wext_sock);
1060         close(drv->wext_sock);
1061 }
1062
1063
1064 static void * hostap_init(struct hostapd_data *hapd)
1065 {
1066         struct hostap_driver_data *drv;
1067
1068         drv = os_zalloc(sizeof(struct hostap_driver_data));
1069         if (drv == NULL) {
1070                 printf("Could not allocate memory for hostapd driver data\n");
1071                 return NULL;
1072         }
1073
1074         drv->hapd = hapd;
1075         drv->ioctl_sock = drv->sock = -1;
1076         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
1077
1078         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1079         if (drv->ioctl_sock < 0) {
1080                 perror("socket[PF_INET,SOCK_DGRAM]");
1081                 free(drv);
1082                 return NULL;
1083         }
1084
1085         if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) {
1086                 printf("Could not enable hostapd mode for interface %s\n",
1087                        drv->iface);
1088                 close(drv->ioctl_sock);
1089                 free(drv);
1090                 return NULL;
1091         }
1092
1093         if (hapd->conf->assoc_ap &&
1094             hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 1)) {
1095                 printf("Could not enable hostapd STA mode for interface %s\n",
1096                        drv->iface);
1097                 close(drv->ioctl_sock);
1098                 free(drv);
1099                 return NULL;
1100         }
1101
1102         if (hostap_init_sockets(drv)) {
1103                 close(drv->ioctl_sock);
1104                 free(drv);
1105                 return NULL;
1106         }
1107
1108         return drv;
1109 }
1110
1111
1112 static void hostap_driver_deinit(void *priv)
1113 {
1114         struct hostap_driver_data *drv = priv;
1115
1116         (void) hostap_set_iface_flags(drv, 0);
1117         (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0);
1118         (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0);
1119
1120         if (drv->ioctl_sock >= 0)
1121                 close(drv->ioctl_sock);
1122
1123         if (drv->sock >= 0)
1124                 close(drv->sock);
1125
1126         os_free(drv->generic_ie);
1127
1128         free(drv);
1129 }
1130
1131
1132 static int hostap_sta_deauth(void *priv, const u8 *addr, int reason)
1133 {
1134         struct hostap_driver_data *drv = priv;
1135         struct ieee80211_mgmt mgmt;
1136
1137         memset(&mgmt, 0, sizeof(mgmt));
1138         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1139                                           WLAN_FC_STYPE_DEAUTH);
1140         memcpy(mgmt.da, addr, ETH_ALEN);
1141         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
1142         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
1143         mgmt.u.deauth.reason_code = host_to_le16(reason);
1144         return hostap_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
1145                                       sizeof(mgmt.u.deauth), 0);
1146 }
1147
1148
1149 static int hostap_sta_disassoc(void *priv, const u8 *addr, int reason)
1150 {
1151         struct hostap_driver_data *drv = priv;
1152         struct ieee80211_mgmt mgmt;
1153
1154         memset(&mgmt, 0, sizeof(mgmt));
1155         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1156                                           WLAN_FC_STYPE_DISASSOC);
1157         memcpy(mgmt.da, addr, ETH_ALEN);
1158         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
1159         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
1160         mgmt.u.disassoc.reason_code = host_to_le16(reason);
1161         return  hostap_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
1162                                        sizeof(mgmt.u.disassoc), 0);
1163 }
1164
1165
1166 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv,
1167                                                             u16 *num_modes,
1168                                                             u16 *flags)
1169 {
1170         struct hostapd_hw_modes *mode;
1171         int i, clen, rlen;
1172         const short chan2freq[14] = {
1173                 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1174                 2447, 2452, 2457, 2462, 2467, 2472, 2484
1175         };
1176
1177         mode = os_zalloc(sizeof(struct hostapd_hw_modes));
1178         if (mode == NULL)
1179                 return NULL;
1180
1181         *num_modes = 1;
1182         *flags = 0;
1183
1184         mode->mode = HOSTAPD_MODE_IEEE80211B;
1185         mode->num_channels = 14;
1186         mode->num_rates = 4;
1187
1188         clen = mode->num_channels * sizeof(struct hostapd_channel_data);
1189         rlen = mode->num_rates * sizeof(struct hostapd_rate_data);
1190
1191         mode->channels = os_zalloc(clen);
1192         mode->rates = os_zalloc(rlen);
1193         if (mode->channels == NULL || mode->rates == NULL) {
1194                 hostapd_free_hw_features(mode, *num_modes);
1195                 return NULL;
1196         }
1197
1198         for (i = 0; i < 14; i++) {
1199                 mode->channels[i].chan = i + 1;
1200                 mode->channels[i].freq = chan2freq[i];
1201         }
1202
1203         mode->rates[0].rate = 10;
1204         mode->rates[0].flags = HOSTAPD_RATE_CCK;
1205         mode->rates[1].rate = 20;
1206         mode->rates[1].flags = HOSTAPD_RATE_CCK;
1207         mode->rates[2].rate = 55;
1208         mode->rates[2].flags = HOSTAPD_RATE_CCK;
1209         mode->rates[3].rate = 110;
1210         mode->rates[3].flags = HOSTAPD_RATE_CCK;
1211
1212         return mode;
1213 }
1214
1215
1216 const struct wpa_driver_ops wpa_driver_hostap_ops = {
1217         .name = "hostap",
1218         .init = hostap_init,
1219         .deinit = hostap_driver_deinit,
1220         .wireless_event_init = hostap_wireless_event_init,
1221         .wireless_event_deinit = hostap_wireless_event_deinit,
1222         .set_ieee8021x = hostap_set_ieee8021x,
1223         .set_privacy = hostap_set_privacy,
1224         .set_encryption = hostap_set_encryption,
1225         .get_seqnum = hostap_get_seqnum,
1226         .flush = hostap_flush,
1227         .set_generic_elem = hostap_set_generic_elem,
1228         .read_sta_data = hostap_read_sta_data,
1229         .send_eapol = hostap_send_eapol,
1230         .sta_set_flags = hostap_sta_set_flags,
1231         .sta_deauth = hostap_sta_deauth,
1232         .sta_disassoc = hostap_sta_disassoc,
1233         .sta_remove = hostap_sta_remove,
1234         .set_ssid = hostap_set_ssid,
1235         .send_mgmt_frame = hostap_send_mgmt_frame,
1236         .set_assoc_ap = hostap_set_assoc_ap,
1237         .sta_add = hostap_sta_add,
1238         .get_inact_sec = hostap_get_inact_sec,
1239         .sta_clear_stats = hostap_sta_clear_stats,
1240         .get_hw_feature_data = hostap_get_hw_feature_data,
1241 };