usr.sbin/802_11/hostapd/driver_dragonfly.c

   1 /*
   2  * Host AP - driver interaction with BSD net80211 layer
   3  * Copyright (c) 2004, Sam Leffler <sam@errno.com>
   4  * Copyright (c) 2004, 2Wire, Inc
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  *
  15  * $FreeBSD: src/usr.sbin/wpa/hostapd/driver_freebsd.c,v 1.2.2.1 2006/03/24 01:43:18 sam Exp $
  16  * $DragonFly: src/usr.sbin/802_11/hostapd/driver_dragonfly.c,v 1.1 2006/09/02 05:40:35 sephe Exp $
  17  */
  18 #include <sys/endian.h>
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <unistd.h>
  22 #include <string.h>
  23 #include <sys/ioctl.h>
  24 #include <errno.h>
  25
  26 #include <sys/socket.h>
  27 #include <net/if.h>
  28 #include <netinet/in.h>
  29
  30 #include <netproto/802_11/ieee80211.h>
  31 #include <netproto/802_11/ieee80211_crypto.h>
  32 #include <netproto/802_11/ieee80211_ioctl.h>
  33
  34 #include "hostapd.h"
  35 #include "driver.h"
  36 #include "ieee802_1x.h"
  37 #include "eloop.h"
  38 #include "sta_info.h"
  39 #include "l2_packet.h"
  40
  41 #include "eapol_sm.h"
  42 #include "wpa.h"
  43 #include "radius.h"
  44 #include "ieee802_11.h"
  45 #include "common.h"
  46 #include "hostap_common.h"
  47
  48 struct bsd_driver_data {
  49         struct driver_ops ops;                  /* base class */
  50         struct hostapd_data *hapd;              /* back pointer */
  51
  52         char    iface[IFNAMSIZ + 1];
  53         struct l2_packet_data *sock_xmit;       /* raw packet xmit socket */
  54         int     ioctl_sock;                     /* socket for ioctl() use */
  55         int     wext_sock;                      /* socket for wireless events */
  56 };
  57
  58 static const struct driver_ops bsd_driver_ops;
  59
  60 static int bsd_sta_deauth(void *priv, u8 *addr, int reason_code);
  61
  62 static int
  63 set80211var(struct bsd_driver_data *drv, int op, const void *arg, int arg_len)
  64 {
  65         struct ieee80211req ireq;
  66
  67         memset(&ireq, 0, sizeof(ireq));
  68         strncpy(ireq.i_name, drv->iface, IFNAMSIZ);
  69         ireq.i_type = op;
  70         ireq.i_len = arg_len;
  71         ireq.i_data = (void *) arg;
  72
  73         if (ioctl(drv->ioctl_sock, SIOCS80211, &ireq) < 0) {
  74                 perror("ioctl[SIOCS80211]");
  75                 return -1;
  76         }
  77         return 0;
  78 }
  79
  80 static int
  81 get80211var(struct bsd_driver_data *drv, int op, void *arg, int arg_len)
  82 {
  83         struct ieee80211req ireq;
  84
  85         memset(&ireq, 0, sizeof(ireq));
  86         strncpy(ireq.i_name, drv->iface, IFNAMSIZ);
  87         ireq.i_type = op;
  88         ireq.i_len = arg_len;
  89         ireq.i_data = arg;
  90
  91         if (ioctl(drv->ioctl_sock, SIOCG80211, &ireq) < 0) {
  92                 perror("ioctl[SIOCG80211]");
  93                 return -1;
  94         }
  95         return ireq.i_len;
  96 }
  97
  98 static int
  99 set80211param(struct bsd_driver_data *drv, int op, int arg)
 100 {
 101         struct ieee80211req ireq;
 102
 103         memset(&ireq, 0, sizeof(ireq));
 104         strncpy(ireq.i_name, drv->iface, IFNAMSIZ);
 105         ireq.i_type = op;
 106         ireq.i_val = arg;
 107
 108         if (ioctl(drv->ioctl_sock, SIOCS80211, &ireq) < 0) {
 109                 perror("ioctl[SIOCS80211]");
 110                 return -1;
 111         }
 112         return 0;
 113 }
 114
 115 static const char *
 116 ether_sprintf(const u8 *addr)
 117 {
 118         static char buf[sizeof(MACSTR)];
 119
 120         if (addr != NULL)
 121                 snprintf(buf, sizeof(buf), MACSTR, MAC2STR(addr));
 122         else
 123                 snprintf(buf, sizeof(buf), MACSTR, 0,0,0,0,0,0);
 124         return buf;
 125 }
 126
 127 /*
 128  * Configure WPA parameters.
 129  */
 130 static int
 131 bsd_configure_wpa(struct bsd_driver_data *drv)
 132 {
 133         static const char *ciphernames[] =
 134                 { "WEP", "TKIP", "AES-OCB", "AES-CCM", "CKIP", "NONE" };
 135         hostapd *hapd = drv->hapd;
 136         struct hostapd_config *conf = hapd->conf;
 137         int v;
 138
 139         switch (conf->wpa_group) {
 140         case WPA_CIPHER_CCMP:
 141                 v = IEEE80211_CIPHER_AES_CCM;
 142                 break;
 143         case WPA_CIPHER_TKIP:
 144                 v = IEEE80211_CIPHER_TKIP;
 145                 break;
 146         case WPA_CIPHER_WEP104:
 147                 v = IEEE80211_CIPHER_WEP;
 148                 break;
 149         case WPA_CIPHER_WEP40:
 150                 v = IEEE80211_CIPHER_WEP;
 151                 break;
 152         case WPA_CIPHER_NONE:
 153                 v = IEEE80211_CIPHER_NONE;
 154                 break;
 155         default:
 156                 printf("Unknown group key cipher %u\n",
 157                         conf->wpa_group);
 158                 return -1;
 159         }
 160         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 161                 "%s: group key cipher=%s (%u)\n", __func__, ciphernames[v], v);
 162         if (set80211param(drv, IEEE80211_IOC_MCASTCIPHER, v)) {
 163                 printf("Unable to set group key cipher to %u (%s)\n",
 164                         v, ciphernames[v]);
 165                 return -1;
 166         }
 167         if (v == IEEE80211_CIPHER_WEP) {
 168                 /* key length is done only for specific ciphers */
 169                 v = (conf->wpa_group == WPA_CIPHER_WEP104 ? 13 : 5);
 170                 if (set80211param(drv, IEEE80211_IOC_MCASTKEYLEN, v)) {
 171                         printf("Unable to set group key length to %u\n", v);
 172                         return -1;
 173                 }
 174         }
 175
 176         v = 0;
 177         if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
 178                 v |= 1<<IEEE80211_CIPHER_AES_CCM;
 179         if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
 180                 v |= 1<<IEEE80211_CIPHER_TKIP;
 181         if (conf->wpa_pairwise & WPA_CIPHER_NONE)
 182                 v |= 1<<IEEE80211_CIPHER_NONE;
 183         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 184                 "%s: pairwise key ciphers=0x%x\n", __func__, v);
 185         if (set80211param(drv, IEEE80211_IOC_UCASTCIPHERS, v)) {
 186                 printf("Unable to set pairwise key ciphers to 0x%x\n", v);
 187                 return -1;
 188         }
 189
 190         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 191                 "%s: key management algorithms=0x%x\n",
 192                 __func__, conf->wpa_key_mgmt);
 193         if (set80211param(drv, IEEE80211_IOC_KEYMGTALGS, conf->wpa_key_mgmt)) {
 194                 printf("Unable to set key management algorithms to 0x%x\n",
 195                         conf->wpa_key_mgmt);
 196                 return -1;
 197         }
 198
 199         v = 0;
 200         if (conf->rsn_preauth)
 201                 v |= BIT(0);
 202         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 203                 "%s: rsn capabilities=0x%x\n", __func__, conf->rsn_preauth);
 204         if (set80211param(drv, IEEE80211_IOC_RSNCAPS, v)) {
 205                 printf("Unable to set RSN capabilities to 0x%x\n", v);
 206                 return -1;
 207         }
 208
 209         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 210                 "%s: enable WPA= 0x%x\n", __func__, conf->wpa);
 211         if (set80211param(drv, IEEE80211_IOC_WPA, conf->wpa)) {
 212                 printf("Unable to set WPA to %u\n", conf->wpa);
 213                 return -1;
 214         }
 215         return 0;
 216 }
 217
 218
 219 static int
 220 bsd_set_iface_flags(void *priv, int dev_up)
 221 {
 222         struct bsd_driver_data *drv = priv;
 223         hostapd *hapd = drv->hapd;
 224         struct ifreq ifr;
 225
 226         HOSTAPD_DEBUG(HOSTAPD_DEBUG_VERBOSE,
 227                 "%s: dev_up=%d\n", __func__, dev_up);
 228
 229         if (drv->ioctl_sock < 0)
 230                 return -1;
 231
 232         memset(&ifr, 0, sizeof(ifr));
 233         snprintf(ifr.ifr_name, IFNAMSIZ, "%s", drv->iface);
 234
 235         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 236                 perror("ioctl[SIOCGIFFLAGS]");
 237                 return -1;
 238         }
 239
 240         if (dev_up)
 241                 ifr.ifr_flags |= IFF_UP;
 242         else
 243                 ifr.ifr_flags &= ~IFF_UP;
 244
 245         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 246                 perror("ioctl[SIOCSIFFLAGS]");
 247                 return -1;
 248         }
 249
 250         if (dev_up) {
 251                 memset(&ifr, 0, sizeof(ifr));
 252                 snprintf(ifr.ifr_name, IFNAMSIZ, "%s", drv->iface);
 253                 ifr.ifr_mtu = HOSTAPD_MTU;
 254                 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
 255                         perror("ioctl[SIOCSIFMTU]");
 256                         printf("Setting MTU failed - trying to survive with "
 257                                "current value\n");
 258                 }
 259         }
 260
 261         return 0;
 262 }
 263
 264 static int
 265 bsd_set_ieee8021x(void *priv, int enabled)
 266 {
 267         struct bsd_driver_data *drv = priv;
 268         hostapd *hapd = drv->hapd;
 269         struct hostapd_config *conf = hapd->conf;
 270
 271         HOSTAPD_DEBUG(HOSTAPD_DEBUG_VERBOSE,
 272                 "%s: enabled=%d\n", __func__, enabled);
 273
 274         if (!enabled) {
 275                 /* XXX restore state */
 276                 return set80211param(priv, IEEE80211_IOC_AUTHMODE,
 277                         IEEE80211_AUTH_AUTO);
 278         }
 279         if (!conf->wpa && !conf->ieee802_1x) {
 280                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 281                         HOSTAPD_LEVEL_WARNING, "No 802.1X or WPA enabled!");
 282                 return -1;
 283         }
 284         if (conf->wpa && bsd_configure_wpa(drv) != 0) {
 285                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 286                         HOSTAPD_LEVEL_WARNING, "Error configuring WPA state!");
 287                 return -1;
 288         }
 289         if (set80211param(priv, IEEE80211_IOC_AUTHMODE,
 290                 (conf->wpa ?  IEEE80211_AUTH_WPA : IEEE80211_AUTH_8021X))) {
 291                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 292                         HOSTAPD_LEVEL_WARNING, "Error enabling WPA/802.1X!");
 293                 return -1;
 294         }
 295         return bsd_set_iface_flags(priv, 1);
 296 }
 297
 298 static int
 299 bsd_set_privacy(void *priv, int enabled)
 300 {
 301         struct bsd_driver_data *drv = priv;
 302         hostapd *hapd = drv->hapd;
 303
 304         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 305                 "%s: enabled=%d\n", __func__, enabled);
 306
 307         return set80211param(priv, IEEE80211_IOC_PRIVACY, enabled);
 308 }
 309
 310 static int
 311 bsd_set_sta_authorized(void *priv, u8 *addr, int authorized)
 312 {
 313         struct bsd_driver_data *drv = priv;
 314         hostapd *hapd = drv->hapd;
 315         struct ieee80211req_mlme mlme;
 316
 317         HOSTAPD_DEBUG(HOSTAPD_DEBUG_VERBOSE,
 318                 "%s: addr=%s authorized=%d\n",
 319                 __func__, ether_sprintf(addr), authorized);
 320
 321         if (authorized)
 322                 mlme.im_op = IEEE80211_MLME_AUTHORIZE;
 323         else
 324                 mlme.im_op = IEEE80211_MLME_UNAUTHORIZE;
 325         mlme.im_reason = 0;
 326         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 327         return set80211var(priv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
 328 }
 329
 330 static int
 331 bsd_del_key(void *priv, unsigned char *addr, int key_idx)
 332 {
 333         struct bsd_driver_data *drv = priv;
 334         hostapd *hapd = drv->hapd;
 335         struct ieee80211req_del_key wk;
 336
 337         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 338                 "%s: addr=%s key_idx=%d\n",
 339                 __func__, ether_sprintf(addr), key_idx);
 340
 341         memset(&wk, 0, sizeof(wk));
 342         if (addr != NULL) {
 343                 memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
 344                 wk.idk_keyix = (u_int8_t) IEEE80211_KEYIX_NONE; /* XXX */
 345         } else {
 346                 wk.idk_keyix = key_idx;
 347         }
 348
 349         return set80211var(priv, IEEE80211_IOC_DELKEY, &wk, sizeof(wk));
 350 }
 351
 352 static int
 353 bsd_set_key(void *priv, const char *alg,
 354              unsigned char *addr, int key_idx,
 355              u8 *key, size_t key_len)
 356 {
 357         struct bsd_driver_data *drv = priv;
 358         hostapd *hapd = drv->hapd;
 359         struct ieee80211req_key wk;
 360         u_int8_t cipher;
 361
 362         if (strcmp(alg, "none") == 0)
 363                 return bsd_del_key(priv, addr, key_idx);
 364
 365         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 366                 "%s: alg=%s addr=%s key_idx=%d\n",
 367                 __func__, alg, ether_sprintf(addr), key_idx);
 368
 369         if (strcmp(alg, "WEP") == 0)
 370                 cipher = IEEE80211_CIPHER_WEP;
 371         else if (strcmp(alg, "TKIP") == 0)
 372                 cipher = IEEE80211_CIPHER_TKIP;
 373         else if (strcmp(alg, "CCMP") == 0)
 374                 cipher = IEEE80211_CIPHER_AES_CCM;
 375         else {
 376                 printf("%s: unknown/unsupported algorithm %s\n",
 377                         __func__, alg);
 378                 return -1;
 379         }
 380
 381         if (key_len > sizeof(wk.ik_keydata)) {
 382                 printf("%s: key length %d too big\n", __func__, key_len);
 383                 return -3;
 384         }
 385
 386         memset(&wk, 0, sizeof(wk));
 387         wk.ik_type = cipher;
 388         wk.ik_flags = IEEE80211_KEY_RECV | IEEE80211_KEY_XMIT;
 389         if (addr == NULL) {
 390                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 391                 wk.ik_keyix = key_idx;
 392                 wk.ik_flags |= IEEE80211_KEY_DEFAULT | IEEE80211_KEY_GROUP;
 393         } else {
 394                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 395                 wk.ik_keyix = IEEE80211_KEYIX_NONE;
 396         }
 397         wk.ik_keylen = key_len;
 398         memcpy(wk.ik_keydata, key, key_len);
 399
 400         return set80211var(priv, IEEE80211_IOC_WPAKEY, &wk, sizeof(wk));
 401 }
 402
 403
 404 static int
 405 bsd_get_seqnum(void *priv, u8 *addr, int idx, u8 *seq)
 406 {
 407         struct bsd_driver_data *drv = priv;
 408         hostapd *hapd = drv->hapd;
 409         struct ieee80211req_key wk;
 410
 411         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 412                 "%s: addr=%s idx=%d\n", __func__, ether_sprintf(addr), idx);
 413
 414         memset(&wk, 0, sizeof(wk));
 415         if (addr == NULL)
 416                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 417         else
 418                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 419         wk.ik_keyix = idx;
 420
 421         if (get80211var(drv, IEEE80211_IOC_WPAKEY, &wk, sizeof(wk)) < 0) {
 422                 printf("Failed to get encryption.\n");
 423                 return -1;
 424         } else {
 425                 /* NB: upper layer expects tsc in network order */
 426                 wk.ik_keytsc = htole64(wk.ik_keytsc);
 427                 memcpy(seq, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
 428                 return 0;
 429         }
 430 }
 431
 432
 433 static int
 434 bsd_flush(void *priv)
 435 {
 436         u8 allsta[IEEE80211_ADDR_LEN];
 437
 438         memset(allsta, 0xff, IEEE80211_ADDR_LEN);
 439         return bsd_sta_deauth(priv, allsta, IEEE80211_REASON_AUTH_LEAVE);
 440 }
 441
 442
 443 static int
 444 bsd_read_sta_driver_data(void *priv, struct hostap_sta_driver_data *data,
 445                                         u8 *addr)
 446 {
 447         struct bsd_driver_data *drv = priv;
 448         struct ieee80211req_sta_stats stats;
 449
 450         memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
 451         if (get80211var(drv, IEEE80211_IOC_STA_STATS, &stats, sizeof(stats)) > 0) {
 452                 /* XXX? do packets counts include non-data frames? */
 453                 data->rx_packets = stats.is_stats.ns_rx_data;
 454                 data->rx_bytes = stats.is_stats.ns_rx_bytes;
 455                 data->tx_packets = stats.is_stats.ns_tx_data;
 456                 data->tx_bytes = stats.is_stats.ns_tx_bytes;
 457         }
 458         return 0;
 459 }
 460
 461 static int
 462 bsd_sta_clear_stats(void *priv, u8 *addr)
 463 {
 464         struct bsd_driver_data *drv = priv;
 465         hostapd *hapd = drv->hapd;
 466         struct ieee80211req_sta_stats stats;
 467
 468         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "%s: addr=%s\n",
 469                       __func__, ether_sprintf(addr));
 470
 471         /* zero station statistics */
 472         memset(&stats, 0, sizeof(stats));
 473         memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
 474         return set80211var(drv, IEEE80211_IOC_STA_STATS, &stats, sizeof(stats));
 475 }
 476
 477 static int
 478 bsd_set_opt_ie(void *priv, const u8 *ie, size_t ie_len)
 479 {
 480         /*
 481          * Do nothing; we setup parameters at startup that define the
 482          * contents of the beacon information element.
 483          */
 484         return 0;
 485 }
 486
 487 static int
 488 bsd_sta_deauth(void *priv, u8 *addr, int reason_code)
 489 {
 490         struct bsd_driver_data *drv = priv;
 491         hostapd *hapd = drv->hapd;
 492         struct ieee80211req_mlme mlme;
 493
 494         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 495                 "%s: addr=%s reason_code=%d\n",
 496                 __func__, ether_sprintf(addr), reason_code);
 497
 498         mlme.im_op = IEEE80211_MLME_DEAUTH;
 499         mlme.im_reason = reason_code;
 500         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 501         return set80211var(priv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
 502 }
 503
 504 static int
 505 bsd_sta_disassoc(void *priv, u8 *addr, int reason_code)
 506 {
 507         struct bsd_driver_data *drv = priv;
 508         hostapd *hapd = drv->hapd;
 509         struct ieee80211req_mlme mlme;
 510
 511         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 512                 "%s: addr=%s reason_code=%d\n",
 513                 __func__, ether_sprintf(addr), reason_code);
 514
 515         mlme.im_reason = reason_code;
 516         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 517         return set80211var(priv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
 518 }
 519
 520 static int
 521 bsd_del_sta(struct bsd_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 522 {
 523         struct hostapd_data *hapd = drv->hapd;
 524         struct hostapd_config *conf = hapd->conf;
 525         struct sta_info *sta;
 526
 527         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 528                 HOSTAPD_LEVEL_INFO, "deassociated");
 529
 530         sta = ap_get_sta(hapd, addr);
 531         if (sta != NULL) {
 532                 sta->flags &= ~WLAN_STA_ASSOC;
 533                 if (conf->wpa)
 534                         wpa_sm_event(hapd, sta, WPA_DISASSOC);
 535                 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 536                 ieee802_1x_set_port_enabled(hapd, sta, 0);
 537                 ap_free_sta(hapd, sta);
 538         }
 539         return 0;
 540 }
 541
 542 static int
 543 bsd_new_sta(struct bsd_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 544 {
 545         struct hostapd_data *hapd = drv->hapd;
 546         struct hostapd_config *conf = hapd->conf;
 547         struct sta_info *sta;
 548         struct ieee80211req_wpaie ie;
 549         int new_assoc, ielen, res;
 550
 551         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 552                 HOSTAPD_LEVEL_INFO, "associated");
 553
 554         sta = ap_sta_add(hapd, addr);
 555         if (sta == NULL)
 556                 return -1;
 557         /*
 558          * Fetch and validate any negotiated WPA/RSN parameters.
 559          */
 560         if (conf->wpa) {
 561                 memset(&ie, 0, sizeof(ie));
 562                 memcpy(ie.wpa_macaddr, addr, IEEE80211_ADDR_LEN);
 563                 if (get80211var(drv, IEEE80211_IOC_WPAIE, &ie, sizeof(ie)) < 0) {
 564                         printf("Failed to get WPA/RSN information element.\n");
 565                         return -1;              /* XXX not right */
 566                 }
 567                 ielen = ie.wpa_ie[1];
 568                 if (ielen == 0) {
 569                         printf("No WPA/RSN information element for station!\n");
 570                         return -1;              /* XXX not right */
 571                 }
 572                 ielen += 2;
 573                 res = wpa_validate_wpa_ie(hapd, sta, ie.wpa_ie, ielen,
 574                                 ie.wpa_ie[0] == WLAN_EID_RSN ?
 575                                     HOSTAPD_WPA_VERSION_WPA2 :
 576                                     HOSTAPD_WPA_VERSION_WPA);
 577                 if (res != WPA_IE_OK) {
 578                         printf("WPA/RSN information element rejected? "
 579                                 "(res %u)\n", res);
 580                         return -1;
 581                 }
 582                 if (sta->wpa_ie != NULL)
 583                         free(sta->wpa_ie);
 584                 sta->wpa_ie = malloc(ielen);
 585                 if (sta->wpa_ie == NULL) {
 586                         printf("No memory for WPA/RSN information element!\n");
 587                         return -1;
 588                 }
 589                 memcpy(sta->wpa_ie, ie.wpa_ie, ielen);
 590                 sta->wpa_ie_len = ielen;
 591         } else {
 592                 if (sta->wpa_ie != NULL)
 593                         free(sta->wpa_ie);
 594                 sta->wpa_ie = NULL;
 595                 sta->wpa_ie_len = 0;
 596         }
 597
 598         /*
 599          * Now that the internal station state is setup
 600          * kick the authenticator into action.
 601          */
 602         new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
 603         sta->flags |= WLAN_STA_ASSOC;
 604         if (new_assoc) {
 605                 if (conf->wpa)
 606                         wpa_sm_event(hapd, sta, WPA_ASSOC);
 607                 hostapd_new_assoc_sta(hapd, sta, !new_assoc);
 608         } else {
 609                 if (conf->wpa)
 610                         wpa_sm_event(hapd, sta, WPA_REAUTH);
 611         }
 612         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
 613         return 0;
 614 }
 615
 616 #include <net/route.h>
 617 #include <netproto/802_11/ieee80211_dragonfly.h>
 618
 619 static void
 620 bsd_wireless_event_receive(int sock, void *ctx, void *sock_ctx)
 621 {
 622         struct bsd_driver_data *drv = ctx;
 623         struct hostapd_data *hapd = drv->hapd;
 624         char buf[2048];
 625         struct if_announcemsghdr *ifan;
 626         struct rt_msghdr *rtm;
 627         struct ieee80211_michael_event *mic;
 628         struct ieee80211_join_event *join;
 629         struct ieee80211_leave_event *leave;
 630         int n;
 631
 632         n = read(sock, buf, sizeof(buf));
 633         if (n < 0) {
 634                 if (errno != EINTR && errno != EAGAIN)
 635                         perror("read(PF_ROUTE)");
 636                 return;
 637         }
 638
 639         rtm = (struct rt_msghdr *) buf;
 640         if (rtm->rtm_version != RTM_VERSION) {
 641                 wpa_printf(MSG_DEBUG, "Routing message version %d not "
 642                         "understood\n", rtm->rtm_version);
 643                 return;
 644         }
 645         ifan = (struct if_announcemsghdr *) rtm;
 646         switch (rtm->rtm_type) {
 647         case RTM_IEEE80211:
 648                 switch (ifan->ifan_what) {
 649                 case RTM_IEEE80211_ASSOC:
 650                 case RTM_IEEE80211_REASSOC:
 651                 case RTM_IEEE80211_DISASSOC:
 652                 case RTM_IEEE80211_SCAN:
 653                         break;
 654                 case RTM_IEEE80211_LEAVE:
 655                         leave = (struct ieee80211_leave_event *) &ifan[1];
 656                         bsd_del_sta(drv, leave->iev_addr);
 657                         break;
 658                 case RTM_IEEE80211_JOIN:
 659 #ifdef RTM_IEEE80211_REJOIN
 660                 case RTM_IEEE80211_REJOIN:
 661 #endif
 662                         join = (struct ieee80211_join_event *) &ifan[1];
 663                         bsd_new_sta(drv, join->iev_addr);
 664                         break;
 665                 case RTM_IEEE80211_REPLAY:
 666                         /* ignore */
 667                         break;
 668                 case RTM_IEEE80211_MICHAEL:
 669                         mic = (struct ieee80211_michael_event *) &ifan[1];
 670                         wpa_printf(MSG_DEBUG,
 671                                 "Michael MIC failure wireless event: "
 672                                 "keyix=%u src_addr=" MACSTR, mic->iev_keyix,
 673                                 MAC2STR(mic->iev_src));
 674                         ieee80211_michael_mic_failure(hapd, mic->iev_src, 1);
 675                         break;
 676                 }
 677                 break;
 678         }
 679 }
 680
 681 static int
 682 bsd_wireless_event_init(void *priv)
 683 {
 684         struct bsd_driver_data *drv = priv;
 685         int s;
 686
 687         drv->wext_sock = -1;
 688
 689         s = socket(PF_ROUTE, SOCK_RAW, 0);
 690         if (s < 0) {
 691                 perror("socket(PF_ROUTE,SOCK_RAW)");
 692                 return -1;
 693         }
 694         eloop_register_read_sock(s, bsd_wireless_event_receive, drv, NULL);
 695         drv->wext_sock = s;
 696
 697         return 0;
 698 }
 699
 700 static void
 701 bsd_wireless_event_deinit(void *priv)
 702 {
 703         struct bsd_driver_data *drv = priv;
 704
 705         if (drv != NULL) {
 706                 if (drv->wext_sock < 0)
 707                         return;
 708                 eloop_unregister_read_sock(drv->wext_sock);
 709                 close(drv->wext_sock);
 710         }
 711 }
 712
 713
 714 static int
 715 bsd_send_eapol(void *priv, u8 *addr, u8 *data, size_t data_len, int encrypt)
 716 {
 717         struct bsd_driver_data *drv = priv;
 718         hostapd *hapd = drv->hapd;
 719         unsigned char buf[3000];
 720         unsigned char *bp = buf;
 721         struct l2_ethhdr *eth;
 722         size_t len;
 723         int status;
 724
 725         /*
 726          * Prepend the Etherent header.  If the caller left us
 727          * space at the front we could just insert it but since
 728          * we don't know we copy to a local buffer.  Given the frequency
 729          * and size of frames this probably doesn't matter.
 730          */
 731         len = data_len + sizeof(struct l2_ethhdr);
 732         if (len > sizeof(buf)) {
 733                 bp = malloc(len);
 734                 if (bp == NULL) {
 735                         printf("EAPOL frame discarded, cannot malloc temp "
 736                                 "buffer of size %u!\n", len);
 737                         return -1;
 738                 }
 739         }
 740         eth = (struct l2_ethhdr *) bp;
 741         memcpy(eth->h_dest, addr, ETH_ALEN);
 742         memcpy(eth->h_source, drv->hapd->own_addr, ETH_ALEN);
 743         eth->h_proto = htons(ETH_P_EAPOL);
 744         memcpy(eth+1, data, data_len);
 745
 746         if (HOSTAPD_DEBUG_COND(HOSTAPD_DEBUG_MSGDUMPS))
 747                 hostapd_hexdump("TX EAPOL", bp, len);
 748
 749         status = l2_packet_send(drv->sock_xmit, addr, ETH_P_EAPOL, bp, len);
 750
 751         if (bp != buf)
 752                 free(bp);
 753         return status;
 754 }
 755
 756 static void
 757 handle_read(void *ctx, const u8 *src_addr, const u8 *buf, size_t len)
 758 {
 759         struct bsd_driver_data *drv = ctx;
 760         hostapd *hapd = drv->hapd;
 761         struct sta_info *sta;
 762
 763         sta = ap_get_sta(hapd, src_addr);
 764         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
 765                 printf("Data frame from not associated STA %s\n",
 766                        ether_sprintf(src_addr));
 767                 /* XXX cannot happen */
 768                 return;
 769         }
 770         ieee802_1x_receive(hapd, src_addr, buf + sizeof(struct l2_ethhdr),
 771                            len - sizeof(struct l2_ethhdr));
 772 }
 773
 774 static int
 775 bsd_get_ssid(void *priv, u8 *buf, int len)
 776 {
 777         struct bsd_driver_data *drv = priv;
 778         hostapd *hapd = drv->hapd;
 779         int ssid_len = get80211var(priv, IEEE80211_IOC_SSID, buf, len);
 780
 781         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "%s: ssid=\"%.*s\"\n",
 782                 __func__, ssid_len, buf);
 783
 784         return ssid_len;
 785 }
 786
 787 static int
 788 bsd_set_ssid(void *priv, u8 *buf, int len)
 789 {
 790         struct bsd_driver_data *drv = priv;
 791         hostapd *hapd = drv->hapd;
 792
 793         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "%s: ssid=\"%.*s\"\n",
 794                 __func__, len, buf);
 795
 796         return set80211var(priv, IEEE80211_IOC_SSID, buf, len);
 797 }
 798
 799 static int
 800 bsd_set_countermeasures(void *priv, int enabled)
 801 {
 802         struct bsd_driver_data *drv = priv;
 803
 804         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 805         return set80211param(drv, IEEE80211_IOC_COUNTERMEASURES, enabled);
 806 }
 807
 808 static int
 809 bsd_init(struct hostapd_data *hapd)
 810 {
 811         struct bsd_driver_data *drv;
 812
 813         drv = malloc(sizeof(struct bsd_driver_data));
 814         if (drv == NULL) {
 815                 printf("Could not allocate memory for bsd driver data\n");
 816                 goto bad;
 817         }
 818
 819         memset(drv, 0, sizeof(*drv));
 820         drv->ops = bsd_driver_ops;
 821         drv->hapd = hapd;
 822         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 823         if (drv->ioctl_sock < 0) {
 824                 perror("socket[PF_INET,SOCK_DGRAM]");
 825                 goto bad;
 826         }
 827         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
 828
 829         drv->sock_xmit = l2_packet_init(drv->iface, NULL, ETH_P_EAPOL,
 830                                         handle_read, drv, 1);
 831         if (drv->sock_xmit == NULL)
 832                 goto bad;
 833         if (l2_packet_get_own_addr(drv->sock_xmit, hapd->own_addr))
 834                 goto bad;
 835
 836         bsd_set_iface_flags(drv, 0);    /* mark down during setup */
 837
 838         hapd->driver = &drv->ops;
 839         return 0;
 840 bad:
 841         if (drv->sock_xmit != NULL)
 842                 l2_packet_deinit(drv->sock_xmit);
 843         if (drv->ioctl_sock >= 0)
 844                 close(drv->ioctl_sock);
 845         if (drv != NULL)
 846                 free(drv);
 847         return -1;
 848 }
 849
 850
 851 static void
 852 bsd_deinit(void *priv)
 853 {
 854         struct bsd_driver_data *drv = priv;
 855
 856         drv->hapd->driver = NULL;
 857
 858         (void) bsd_set_iface_flags(drv, 0);
 859         if (drv->ioctl_sock >= 0)
 860                 close(drv->ioctl_sock);
 861         if (drv->sock_xmit != NULL)
 862                 l2_packet_deinit(drv->sock_xmit);
 863         free(drv);
 864 }
 865
 866 static const struct driver_ops bsd_driver_ops = {
 867         .name                   = "bsd",
 868         .init                   = bsd_init,
 869         .deinit                 = bsd_deinit,
 870         .set_ieee8021x          = bsd_set_ieee8021x,
 871         .set_privacy            = bsd_set_privacy,
 872         .set_encryption         = bsd_set_key,
 873         .get_seqnum             = bsd_get_seqnum,
 874         .flush                  = bsd_flush,
 875         .set_generic_elem       = bsd_set_opt_ie,
 876         .wireless_event_init    = bsd_wireless_event_init,
 877         .wireless_event_deinit  = bsd_wireless_event_deinit,
 878         .set_sta_authorized     = bsd_set_sta_authorized,
 879         .read_sta_data          = bsd_read_sta_driver_data,
 880         .send_eapol             = bsd_send_eapol,
 881         .sta_disassoc           = bsd_sta_disassoc,
 882         .sta_deauth             = bsd_sta_deauth,
 883         .set_ssid               = bsd_set_ssid,
 884         .get_ssid               = bsd_get_ssid,
 885         .set_countermeasures    = bsd_set_countermeasures,
 886         .sta_clear_stats        = bsd_sta_clear_stats,
 887 };
 888
 889 void bsd_driver_register(void)
 890 {
 891         driver_register(bsd_driver_ops.name, &bsd_driver_ops);
 892 }