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 1.6 2007/07/09 16:26:48 sam Exp $
  16  * $DragonFly: src/usr.sbin/802_11/hostapd/driver_dragonfly.c,v 1.3 2007/08/07 11:25:36 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, const 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", "*BAD*", "CKIP", "NONE" };
 135         struct hostapd_data *hapd = drv->hapd;
 136         struct hostapd_bss_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         struct hostapd_data *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(const char *ifname, void *priv, int enabled)
 266 {
 267         struct bsd_driver_data *drv = priv;
 268         struct hostapd_data *hapd = drv->hapd;
 269         struct hostapd_bss_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(const char *ifname, void *priv, int enabled)
 300 {
 301         struct bsd_driver_data *drv = priv;
 302         struct hostapd_data *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, const u8 *addr, int authorized)
 312 {
 313         struct bsd_driver_data *drv = priv;
 314         struct hostapd_data *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_sta_set_flags(void *priv, const u8 *addr, int flags_or, int flags_and)
 332 {
 333         /* For now, only support setting Authorized flag */
 334         if (flags_or & WLAN_STA_AUTHORIZED)
 335                 return bsd_set_sta_authorized(priv, addr, 1);
 336         if (!(flags_and & WLAN_STA_AUTHORIZED))
 337                 return bsd_set_sta_authorized(priv, addr, 0);
 338         return 0;
 339 }
 340
 341 static int
 342 bsd_del_key(void *priv, const unsigned char *addr, int key_idx)
 343 {
 344         struct bsd_driver_data *drv = priv;
 345         struct hostapd_data *hapd = drv->hapd;
 346         struct ieee80211req_del_key wk;
 347
 348         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 349                 "%s: addr=%s key_idx=%d\n",
 350                 __func__, ether_sprintf(addr), key_idx);
 351
 352         memset(&wk, 0, sizeof(wk));
 353         if (addr != NULL) {
 354                 memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
 355                 wk.idk_keyix = (u_int8_t) IEEE80211_KEYIX_NONE; /* XXX */
 356         } else {
 357                 wk.idk_keyix = key_idx;
 358         }
 359
 360         return set80211var(priv, IEEE80211_IOC_DELKEY, &wk, sizeof(wk));
 361 }
 362
 363 static int
 364 bsd_set_key(const char *ifname, void *priv, const char *alg,
 365             const u8 *addr, int key_idx,
 366             const u8 *key, size_t key_len, int txkey)
 367 {
 368         struct bsd_driver_data *drv = priv;
 369         struct hostapd_data *hapd = drv->hapd;
 370         struct ieee80211req_key wk;
 371         u_int8_t cipher;
 372
 373         if (strcmp(alg, "none") == 0)
 374                 return bsd_del_key(priv, addr, key_idx);
 375
 376         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 377                 "%s: alg=%s addr=%s key_idx=%d\n",
 378                 __func__, alg, ether_sprintf(addr), key_idx);
 379
 380         if (strcmp(alg, "WEP") == 0)
 381                 cipher = IEEE80211_CIPHER_WEP;
 382         else if (strcmp(alg, "TKIP") == 0)
 383                 cipher = IEEE80211_CIPHER_TKIP;
 384         else if (strcmp(alg, "CCMP") == 0)
 385                 cipher = IEEE80211_CIPHER_AES_CCM;
 386         else {
 387                 printf("%s: unknown/unsupported algorithm %s\n",
 388                         __func__, alg);
 389                 return -1;
 390         }
 391
 392         if (key_len > sizeof(wk.ik_keydata)) {
 393                 printf("%s: key length %d too big\n", __func__, key_len);
 394                 return -3;
 395         }
 396
 397         memset(&wk, 0, sizeof(wk));
 398         wk.ik_type = cipher;
 399         wk.ik_flags = IEEE80211_KEY_RECV | IEEE80211_KEY_XMIT;
 400         if (addr == NULL) {
 401                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 402                 wk.ik_keyix = key_idx;
 403                 wk.ik_flags |= IEEE80211_KEY_DEFAULT | IEEE80211_KEY_GROUP;
 404         } else {
 405                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 406                 wk.ik_keyix = IEEE80211_KEYIX_NONE;
 407         }
 408         wk.ik_keylen = key_len;
 409         memcpy(wk.ik_keydata, key, key_len);
 410
 411         return set80211var(priv, IEEE80211_IOC_WPAKEY, &wk, sizeof(wk));
 412 }
 413
 414
 415 static int
 416 bsd_get_seqnum(const char *ifname, void *priv, const u8 *addr, int idx,
 417                u8 *seq)
 418 {
 419         struct bsd_driver_data *drv = priv;
 420         struct hostapd_data *hapd = drv->hapd;
 421         struct ieee80211req_key wk;
 422
 423         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 424                 "%s: addr=%s idx=%d\n", __func__, ether_sprintf(addr), idx);
 425
 426         memset(&wk, 0, sizeof(wk));
 427         if (addr == NULL)
 428                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 429         else
 430                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 431         wk.ik_keyix = idx;
 432
 433         if (get80211var(drv, IEEE80211_IOC_WPAKEY, &wk, sizeof(wk)) < 0) {
 434                 printf("Failed to get encryption.\n");
 435                 return -1;
 436         } else {
 437                 /* NB: upper layer expects tsc in network order */
 438                 wk.ik_keytsc = htole64(wk.ik_keytsc);
 439                 memcpy(seq, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
 440                 return 0;
 441         }
 442 }
 443
 444
 445 static int
 446 bsd_flush(void *priv)
 447 {
 448         u8 allsta[IEEE80211_ADDR_LEN];
 449
 450         memset(allsta, 0xff, IEEE80211_ADDR_LEN);
 451         return bsd_sta_deauth(priv, allsta, IEEE80211_REASON_AUTH_LEAVE);
 452 }
 453
 454
 455 static int
 456 bsd_read_sta_driver_data(void *priv, struct hostap_sta_driver_data *data,
 457                          const u8 *addr)
 458 {
 459         struct bsd_driver_data *drv = priv;
 460         struct ieee80211req_sta_stats stats;
 461
 462         memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
 463         if (get80211var(drv, IEEE80211_IOC_STA_STATS, &stats, sizeof(stats)) > 0) {
 464                 /* XXX? do packets counts include non-data frames? */
 465                 data->rx_packets = stats.is_stats.ns_rx_data;
 466                 data->rx_bytes = stats.is_stats.ns_rx_bytes;
 467                 data->tx_packets = stats.is_stats.ns_tx_data;
 468                 data->tx_bytes = stats.is_stats.ns_tx_bytes;
 469         }
 470         return 0;
 471 }
 472
 473 static int
 474 bsd_sta_clear_stats(void *priv, const u8 *addr)
 475 {
 476         struct bsd_driver_data *drv = priv;
 477         struct hostapd_data *hapd = drv->hapd;
 478         struct ieee80211req_sta_stats stats;
 479
 480         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "%s: addr=%s\n",
 481                       __func__, ether_sprintf(addr));
 482
 483         /* zero station statistics */
 484         memset(&stats, 0, sizeof(stats));
 485         memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
 486         return set80211var(drv, IEEE80211_IOC_STA_STATS, &stats, sizeof(stats));
 487 }
 488
 489 static int
 490 bsd_set_opt_ie(const char *ifname, void *priv, const u8 *ie, size_t ie_len)
 491 {
 492         /*
 493          * Do nothing; we setup parameters at startup that define the
 494          * contents of the beacon information element.
 495          */
 496         return 0;
 497 }
 498
 499 static int
 500 bsd_sta_deauth(void *priv, const u8 *addr, int reason_code)
 501 {
 502         struct bsd_driver_data *drv = priv;
 503         struct hostapd_data *hapd = drv->hapd;
 504         struct ieee80211req_mlme mlme;
 505
 506         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 507                 "%s: addr=%s reason_code=%d\n",
 508                 __func__, ether_sprintf(addr), reason_code);
 509
 510         mlme.im_op = IEEE80211_MLME_DEAUTH;
 511         mlme.im_reason = reason_code;
 512         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 513         return set80211var(priv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
 514 }
 515
 516 static int
 517 bsd_sta_disassoc(void *priv, const u8 *addr, int reason_code)
 518 {
 519         struct bsd_driver_data *drv = priv;
 520         struct hostapd_data *hapd = drv->hapd;
 521         struct ieee80211req_mlme mlme;
 522
 523         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
 524                 "%s: addr=%s reason_code=%d\n",
 525                 __func__, ether_sprintf(addr), reason_code);
 526
 527         mlme.im_reason = reason_code;
 528         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 529         return set80211var(priv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
 530 }
 531
 532 static int
 533 bsd_del_sta(struct bsd_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 534 {
 535         struct hostapd_data *hapd = drv->hapd;
 536         struct hostapd_bss_config *conf = hapd->conf;
 537         struct sta_info *sta;
 538
 539         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 540                 HOSTAPD_LEVEL_INFO, "deassociated");
 541
 542         sta = ap_get_sta(hapd, addr);
 543         if (sta != NULL) {
 544                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 545                 if (conf->wpa)
 546                         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
 547                 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 548                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 549                 ap_free_sta(hapd, sta);
 550         }
 551         return 0;
 552 }
 553
 554 static int
 555 bsd_new_sta(struct bsd_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 556 {
 557         struct hostapd_data *hapd = drv->hapd;
 558         struct hostapd_bss_config *conf = hapd->conf;
 559         struct sta_info *sta;
 560         struct ieee80211req_wpaie ie;
 561         int new_assoc, ielen, res;
 562
 563         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 564                 HOSTAPD_LEVEL_INFO, "associated");
 565
 566         sta = ap_sta_add(hapd, addr);
 567         if (sta == NULL)
 568                 return -1;
 569         /*
 570          * Fetch and validate any negotiated WPA/RSN parameters.
 571          */
 572         if (conf->wpa) {
 573                 memset(&ie, 0, sizeof(ie));
 574                 memcpy(ie.wpa_macaddr, addr, IEEE80211_ADDR_LEN);
 575                 if (get80211var(drv, IEEE80211_IOC_WPAIE, &ie, sizeof(ie)) < 0) {
 576                         printf("Failed to get WPA/RSN information element.\n");
 577                         return -1;              /* XXX not right */
 578                 }
 579                 if (ie.wpa_ie[1] == 0) {
 580                         printf("No WPA/RSN information element for station!\n");
 581                         return -1;              /* XXX not right */
 582                 }
 583                 if (sta->wpa_sm == NULL)
 584                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 585                                                         sta->addr);
 586                 if (sta->wpa_sm == NULL) {
 587                         printf("Failed to initialize WPA state machine\n");
 588                         return -1;
 589                 }
 590                 ielen = 2 + ie.wpa_ie[1];
 591                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 592                                           ie.wpa_ie, ielen);
 593                 if (res != WPA_IE_OK) {
 594                         printf("WPA/RSN information element rejected? "
 595                                 "(res %u)\n", res);
 596                         return -1;
 597                 }
 598         }
 599
 600         /*
 601          * Now that the internal station state is setup
 602          * kick the authenticator into action.
 603          */
 604         new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
 605         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
 606         wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
 607         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
 608         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
 609
 610         return 0;
 611 }
 612
 613 #include <net/route.h>
 614 #include <netproto/802_11/ieee80211_dragonfly.h>
 615
 616 static void
 617 bsd_wireless_event_receive(int sock, void *ctx, void *sock_ctx)
 618 {
 619         struct bsd_driver_data *drv = ctx;
 620         struct hostapd_data *hapd = drv->hapd;
 621         char buf[2048];
 622         struct if_announcemsghdr *ifan;
 623         struct rt_msghdr *rtm;
 624         struct ieee80211_michael_event *mic;
 625         struct ieee80211_join_event *join;
 626         struct ieee80211_leave_event *leave;
 627         int n;
 628
 629         n = read(sock, buf, sizeof(buf));
 630         if (n < 0) {
 631                 if (errno != EINTR && errno != EAGAIN)
 632                         perror("read(PF_ROUTE)");
 633                 return;
 634         }
 635
 636         rtm = (struct rt_msghdr *) buf;
 637         if (rtm->rtm_version != RTM_VERSION) {
 638                 wpa_printf(MSG_DEBUG, "Routing message version %d not "
 639                         "understood\n", rtm->rtm_version);
 640                 return;
 641         }
 642         ifan = (struct if_announcemsghdr *) rtm;
 643         switch (rtm->rtm_type) {
 644         case RTM_IEEE80211:
 645                 switch (ifan->ifan_what) {
 646                 case RTM_IEEE80211_ASSOC:
 647                 case RTM_IEEE80211_REASSOC:
 648                 case RTM_IEEE80211_DISASSOC:
 649                 case RTM_IEEE80211_SCAN:
 650                         break;
 651                 case RTM_IEEE80211_LEAVE:
 652                         leave = (struct ieee80211_leave_event *) &ifan[1];
 653                         bsd_del_sta(drv, leave->iev_addr);
 654                         break;
 655                 case RTM_IEEE80211_JOIN:
 656 #ifdef RTM_IEEE80211_REJOIN
 657                 case RTM_IEEE80211_REJOIN:
 658 #endif
 659                         join = (struct ieee80211_join_event *) &ifan[1];
 660                         bsd_new_sta(drv, join->iev_addr);
 661                         break;
 662                 case RTM_IEEE80211_REPLAY:
 663                         /* ignore */
 664                         break;
 665                 case RTM_IEEE80211_MICHAEL:
 666                         mic = (struct ieee80211_michael_event *) &ifan[1];
 667                         wpa_printf(MSG_DEBUG,
 668                                 "Michael MIC failure wireless event: "
 669                                 "keyix=%u src_addr=" MACSTR, mic->iev_keyix,
 670                                 MAC2STR(mic->iev_src));
 671                         ieee80211_michael_mic_failure(hapd, mic->iev_src, 1);
 672                         break;
 673                 }
 674                 break;
 675         }
 676 }
 677
 678 static int
 679 bsd_wireless_event_init(void *priv)
 680 {
 681         struct bsd_driver_data *drv = priv;
 682         int s;
 683
 684         drv->wext_sock = -1;
 685
 686         s = socket(PF_ROUTE, SOCK_RAW, 0);
 687         if (s < 0) {
 688                 perror("socket(PF_ROUTE,SOCK_RAW)");
 689                 return -1;
 690         }
 691         eloop_register_read_sock(s, bsd_wireless_event_receive, drv, NULL);
 692         drv->wext_sock = s;
 693
 694         return 0;
 695 }
 696
 697 static void
 698 bsd_wireless_event_deinit(void *priv)
 699 {
 700         struct bsd_driver_data *drv = priv;
 701
 702         if (drv != NULL) {
 703                 if (drv->wext_sock < 0)
 704                         return;
 705                 eloop_unregister_read_sock(drv->wext_sock);
 706                 close(drv->wext_sock);
 707         }
 708 }
 709
 710
 711 static int
 712 bsd_send_eapol(void *priv, const u8 *addr, const u8 *data, size_t data_len,
 713                int encrypt, const u8 *own_addr)
 714 {
 715         struct bsd_driver_data *drv = priv;
 716         struct hostapd_data *hapd = drv->hapd;
 717         unsigned char buf[3000];
 718         unsigned char *bp = buf;
 719         struct l2_ethhdr *eth;
 720         size_t len;
 721         int status;
 722
 723         /*
 724          * Prepend the Etherent header.  If the caller left us
 725          * space at the front we could just insert it but since
 726          * we don't know we copy to a local buffer.  Given the frequency
 727          * and size of frames this probably doesn't matter.
 728          */
 729         len = data_len + sizeof(struct l2_ethhdr);
 730         if (len > sizeof(buf)) {
 731                 bp = malloc(len);
 732                 if (bp == NULL) {
 733                         printf("EAPOL frame discarded, cannot malloc temp "
 734                                 "buffer of size %u!\n", len);
 735                         return -1;
 736                 }
 737         }
 738         eth = (struct l2_ethhdr *) bp;
 739         memcpy(eth->h_dest, addr, ETH_ALEN);
 740         memcpy(eth->h_source, own_addr, ETH_ALEN);
 741         eth->h_proto = htons(ETH_P_EAPOL);
 742         memcpy(eth+1, data, data_len);
 743
 744         wpa_hexdump(MSG_MSGDUMP, "TX EAPOL", bp, len);
 745
 746         status = l2_packet_send(drv->sock_xmit, addr, ETH_P_EAPOL, bp, len);
 747
 748         if (bp != buf)
 749                 free(bp);
 750         return status;
 751 }
 752
 753 static void
 754 handle_read(void *ctx, const u8 *src_addr, const u8 *buf, size_t len)
 755 {
 756         struct bsd_driver_data *drv = ctx;
 757         struct hostapd_data *hapd = drv->hapd;
 758         struct sta_info *sta;
 759
 760         sta = ap_get_sta(hapd, src_addr);
 761         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
 762                 printf("Data frame from not associated STA %s\n",
 763                        ether_sprintf(src_addr));
 764                 /* XXX cannot happen */
 765                 return;
 766         }
 767         ieee802_1x_receive(hapd, src_addr, buf + sizeof(struct l2_ethhdr),
 768                            len - sizeof(struct l2_ethhdr));
 769 }
 770
 771 static int
 772 bsd_get_ssid(const char *ifname, void *priv, u8 *buf, int len)
 773 {
 774         struct bsd_driver_data *drv = priv;
 775         struct hostapd_data *hapd = drv->hapd;
 776         int ssid_len = get80211var(priv, IEEE80211_IOC_SSID, buf, len);
 777
 778         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "%s: ssid=\"%.*s\"\n",
 779                 __func__, ssid_len, buf);
 780
 781         return ssid_len;
 782 }
 783
 784 static int
 785 bsd_set_ssid(const char *ifname, void *priv, const u8 *buf, int len)
 786 {
 787         struct bsd_driver_data *drv = priv;
 788         struct hostapd_data *hapd = drv->hapd;
 789
 790         HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "%s: ssid=\"%.*s\"\n",
 791                 __func__, len, buf);
 792
 793         return set80211var(priv, IEEE80211_IOC_SSID, buf, len);
 794 }
 795
 796 static int
 797 bsd_set_countermeasures(void *priv, int enabled)
 798 {
 799         struct bsd_driver_data *drv = priv;
 800
 801         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 802         return set80211param(drv, IEEE80211_IOC_COUNTERMEASURES, enabled);
 803 }
 804
 805 static int
 806 bsd_init(struct hostapd_data *hapd)
 807 {
 808         struct bsd_driver_data *drv;
 809
 810         drv = malloc(sizeof(struct bsd_driver_data));
 811         if (drv == NULL) {
 812                 printf("Could not allocate memory for bsd driver data\n");
 813                 goto bad;
 814         }
 815
 816         memset(drv, 0, sizeof(*drv));
 817         drv->ops = bsd_driver_ops;
 818         drv->hapd = hapd;
 819         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 820         if (drv->ioctl_sock < 0) {
 821                 perror("socket[PF_INET,SOCK_DGRAM]");
 822                 goto bad;
 823         }
 824         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
 825
 826         drv->sock_xmit = l2_packet_init(drv->iface, NULL, ETH_P_EAPOL,
 827                                         handle_read, drv, 1);
 828         if (drv->sock_xmit == NULL)
 829                 goto bad;
 830         if (l2_packet_get_own_addr(drv->sock_xmit, hapd->own_addr))
 831                 goto bad;
 832
 833         bsd_set_iface_flags(drv, 0);    /* mark down during setup */
 834
 835         hapd->driver = &drv->ops;
 836         return 0;
 837 bad:
 838         if (drv != NULL) {
 839                 if (drv->sock_xmit != NULL)
 840                         l2_packet_deinit(drv->sock_xmit);
 841                 if (drv->ioctl_sock >= 0)
 842                         close(drv->ioctl_sock);
 843                 free(drv);
 844         }
 845         return -1;
 846 }
 847
 848
 849 static void
 850 bsd_deinit(void *priv)
 851 {
 852         struct bsd_driver_data *drv = priv;
 853
 854         drv->hapd->driver = NULL;
 855
 856         (void) bsd_set_iface_flags(drv, 0);
 857         if (drv->ioctl_sock >= 0)
 858                 close(drv->ioctl_sock);
 859         if (drv->sock_xmit != NULL)
 860                 l2_packet_deinit(drv->sock_xmit);
 861         free(drv);
 862 }
 863
 864 static const struct driver_ops bsd_driver_ops = {
 865         .name                   = "bsd",
 866         .init                   = bsd_init,
 867         .deinit                 = bsd_deinit,
 868         .set_ieee8021x          = bsd_set_ieee8021x,
 869         .set_privacy            = bsd_set_privacy,
 870         .set_encryption         = bsd_set_key,
 871         .get_seqnum             = bsd_get_seqnum,
 872         .flush                  = bsd_flush,
 873         .set_generic_elem       = bsd_set_opt_ie,
 874         .wireless_event_init    = bsd_wireless_event_init,
 875         .wireless_event_deinit  = bsd_wireless_event_deinit,
 876         .sta_set_flags          = bsd_sta_set_flags,
 877         .read_sta_data          = bsd_read_sta_driver_data,
 878         .send_eapol             = bsd_send_eapol,
 879         .sta_disassoc           = bsd_sta_disassoc,
 880         .sta_deauth             = bsd_sta_deauth,
 881         .set_ssid               = bsd_set_ssid,
 882         .get_ssid               = bsd_get_ssid,
 883         .set_countermeasures    = bsd_set_countermeasures,
 884         .sta_clear_stats        = bsd_sta_clear_stats,
 885 };
 886
 887 void bsd_driver_register(void)
 888 {
 889         driver_register(bsd_driver_ops.name, &bsd_driver_ops);
 890 }