contrib/hostapd/hostapd/driver_madwifi.c

   1 /*
   2  * hostapd / Driver interaction with MADWIFI 802.11 driver
   3  * Copyright (c) 2004, Sam Leffler <sam@errno.com>
   4  * Copyright (c) 2004, Video54 Technologies
   5  * Copyright (c) 2005-2007, Jouni Malinen <j@w1.fi>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Alternatively, this software may be distributed under the terms of BSD
  12  * license.
  13  *
  14  * See README and COPYING for more details.
  15  */
  16
  17 #include "includes.h"
  18 #include <net/if.h>
  19 #include <sys/ioctl.h>
  20
  21 #include <include/compat.h>
  22 #include <net80211/ieee80211.h>
  23 #ifdef WME_NUM_AC
  24 /* Assume this is built against BSD branch of madwifi driver. */
  25 #define MADWIFI_BSD
  26 #include <net80211/_ieee80211.h>
  27 #endif /* WME_NUM_AC */
  28 #include <net80211/ieee80211_crypto.h>
  29 #include <net80211/ieee80211_ioctl.h>
  30
  31 #ifdef CONFIG_WPS
  32 #ifdef IEEE80211_IOCTL_FILTERFRAME
  33 #include <netpacket/packet.h>
  34
  35 #ifndef ETH_P_80211_RAW
  36 #define ETH_P_80211_RAW 0x0019
  37 #endif
  38 #endif /* IEEE80211_IOCTL_FILTERFRAME */
  39 #endif /* CONFIG_WPS */
  40
  41 /*
  42  * Avoid conflicts with hostapd definitions by undefining couple of defines
  43  * from madwifi header files.
  44  */
  45 #undef RSN_VERSION
  46 #undef WPA_VERSION
  47 #undef WPA_OUI_TYPE
  48 #undef WME_OUI_TYPE
  49
  50
  51 #ifdef IEEE80211_IOCTL_SETWMMPARAMS
  52 /* Assume this is built against madwifi-ng */
  53 #define MADWIFI_NG
  54 #endif /* IEEE80211_IOCTL_SETWMMPARAMS */
  55
  56 #include "wireless_copy.h"
  57
  58 #include "hostapd.h"
  59 #include "driver.h"
  60 #include "ieee802_1x.h"
  61 #include "eloop.h"
  62 #include "priv_netlink.h"
  63 #include "sta_info.h"
  64 #include "l2_packet/l2_packet.h"
  65
  66 #include "wpa.h"
  67 #include "radius/radius.h"
  68 #include "ieee802_11.h"
  69 #include "accounting.h"
  70 #include "common.h"
  71 #include "wps_hostapd.h"
  72
  73
  74 struct madwifi_driver_data {
  75         struct hostapd_data *hapd;              /* back pointer */
  76
  77         char    iface[IFNAMSIZ + 1];
  78         int     ifindex;
  79         struct l2_packet_data *sock_xmit;       /* raw packet xmit socket */
  80         struct l2_packet_data *sock_recv;       /* raw packet recv socket */
  81         int     ioctl_sock;                     /* socket for ioctl() use */
  82         int     wext_sock;                      /* socket for wireless events */
  83         int     we_version;
  84         u8      acct_mac[ETH_ALEN];
  85         struct hostap_sta_driver_data acct_data;
  86
  87         struct l2_packet_data *sock_raw; /* raw 802.11 management frames */
  88 };
  89
  90 static int madwifi_sta_deauth(void *priv, const u8 *addr, int reason_code);
  91
  92 static int
  93 set80211priv(struct madwifi_driver_data *drv, int op, void *data, int len)
  94 {
  95         struct iwreq iwr;
  96         int do_inline = len < IFNAMSIZ;
  97
  98         memset(&iwr, 0, sizeof(iwr));
  99         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 100 #ifdef IEEE80211_IOCTL_FILTERFRAME
 101         /* FILTERFRAME must be NOT inline, regardless of size. */
 102         if (op == IEEE80211_IOCTL_FILTERFRAME)
 103                 do_inline = 0;
 104 #endif /* IEEE80211_IOCTL_FILTERFRAME */
 105         if (op == IEEE80211_IOCTL_SET_APPIEBUF)
 106                 do_inline = 0;
 107         if (do_inline) {
 108                 /*
 109                  * Argument data fits inline; put it there.
 110                  */
 111                 memcpy(iwr.u.name, data, len);
 112         } else {
 113                 /*
 114                  * Argument data too big for inline transfer; setup a
 115                  * parameter block instead; the kernel will transfer
 116                  * the data for the driver.
 117                  */
 118                 iwr.u.data.pointer = data;
 119                 iwr.u.data.length = len;
 120         }
 121
 122         if (ioctl(drv->ioctl_sock, op, &iwr) < 0) {
 123 #ifdef MADWIFI_NG
 124                 int first = IEEE80211_IOCTL_SETPARAM;
 125                 static const char *opnames[] = {
 126                         "ioctl[IEEE80211_IOCTL_SETPARAM]",
 127                         "ioctl[IEEE80211_IOCTL_GETPARAM]",
 128                         "ioctl[IEEE80211_IOCTL_SETMODE]",
 129                         "ioctl[IEEE80211_IOCTL_GETMODE]",
 130                         "ioctl[IEEE80211_IOCTL_SETWMMPARAMS]",
 131                         "ioctl[IEEE80211_IOCTL_GETWMMPARAMS]",
 132                         "ioctl[IEEE80211_IOCTL_SETCHANLIST]",
 133                         "ioctl[IEEE80211_IOCTL_GETCHANLIST]",
 134                         "ioctl[IEEE80211_IOCTL_CHANSWITCH]",
 135                         "ioctl[IEEE80211_IOCTL_GET_APPIEBUF]",
 136                         "ioctl[IEEE80211_IOCTL_SET_APPIEBUF]",
 137                         "ioctl[IEEE80211_IOCTL_GETSCANRESULTS]",
 138                         "ioctl[IEEE80211_IOCTL_FILTERFRAME]",
 139                         "ioctl[IEEE80211_IOCTL_GETCHANINFO]",
 140                         "ioctl[IEEE80211_IOCTL_SETOPTIE]",
 141                         "ioctl[IEEE80211_IOCTL_GETOPTIE]",
 142                         "ioctl[IEEE80211_IOCTL_SETMLME]",
 143                         NULL,
 144                         "ioctl[IEEE80211_IOCTL_SETKEY]",
 145                         NULL,
 146                         "ioctl[IEEE80211_IOCTL_DELKEY]",
 147                         NULL,
 148                         "ioctl[IEEE80211_IOCTL_ADDMAC]",
 149                         NULL,
 150                         "ioctl[IEEE80211_IOCTL_DELMAC]",
 151                         NULL,
 152                         "ioctl[IEEE80211_IOCTL_WDSMAC]",
 153                         NULL,
 154                         "ioctl[IEEE80211_IOCTL_WDSDELMAC]",
 155                         NULL,
 156                         "ioctl[IEEE80211_IOCTL_KICKMAC]",
 157                 };
 158 #else /* MADWIFI_NG */
 159                 int first = IEEE80211_IOCTL_SETPARAM;
 160                 static const char *opnames[] = {
 161                         "ioctl[IEEE80211_IOCTL_SETPARAM]",
 162                         "ioctl[IEEE80211_IOCTL_GETPARAM]",
 163                         "ioctl[IEEE80211_IOCTL_SETKEY]",
 164                         "ioctl[SIOCIWFIRSTPRIV+3]",
 165                         "ioctl[IEEE80211_IOCTL_DELKEY]",
 166                         "ioctl[SIOCIWFIRSTPRIV+5]",
 167                         "ioctl[IEEE80211_IOCTL_SETMLME]",
 168                         "ioctl[SIOCIWFIRSTPRIV+7]",
 169                         "ioctl[IEEE80211_IOCTL_SETOPTIE]",
 170                         "ioctl[IEEE80211_IOCTL_GETOPTIE]",
 171                         "ioctl[IEEE80211_IOCTL_ADDMAC]",
 172                         "ioctl[SIOCIWFIRSTPRIV+11]",
 173                         "ioctl[IEEE80211_IOCTL_DELMAC]",
 174                         "ioctl[SIOCIWFIRSTPRIV+13]",
 175                         "ioctl[IEEE80211_IOCTL_CHANLIST]",
 176                         "ioctl[SIOCIWFIRSTPRIV+15]",
 177                         "ioctl[IEEE80211_IOCTL_GETRSN]",
 178                         "ioctl[SIOCIWFIRSTPRIV+17]",
 179                         "ioctl[IEEE80211_IOCTL_GETKEY]",
 180                 };
 181 #endif /* MADWIFI_NG */
 182                 int idx = op - first;
 183                 if (first <= op &&
 184                     idx < (int) (sizeof(opnames) / sizeof(opnames[0])) &&
 185                     opnames[idx])
 186                         perror(opnames[idx]);
 187                 else
 188                         perror("ioctl[unknown???]");
 189                 return -1;
 190         }
 191         return 0;
 192 }
 193
 194 static int
 195 set80211param(struct madwifi_driver_data *drv, int op, int arg)
 196 {
 197         struct iwreq iwr;
 198
 199         memset(&iwr, 0, sizeof(iwr));
 200         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 201         iwr.u.mode = op;
 202         memcpy(iwr.u.name+sizeof(__u32), &arg, sizeof(arg));
 203
 204         if (ioctl(drv->ioctl_sock, IEEE80211_IOCTL_SETPARAM, &iwr) < 0) {
 205                 perror("ioctl[IEEE80211_IOCTL_SETPARAM]");
 206                 wpa_printf(MSG_DEBUG, "%s: Failed to set parameter (op %d "
 207                            "arg %d)", __func__, op, arg);
 208                 return -1;
 209         }
 210         return 0;
 211 }
 212
 213 static const char *
 214 ether_sprintf(const u8 *addr)
 215 {
 216         static char buf[sizeof(MACSTR)];
 217
 218         if (addr != NULL)
 219                 snprintf(buf, sizeof(buf), MACSTR, MAC2STR(addr));
 220         else
 221                 snprintf(buf, sizeof(buf), MACSTR, 0,0,0,0,0,0);
 222         return buf;
 223 }
 224
 225 /*
 226  * Configure WPA parameters.
 227  */
 228 static int
 229 madwifi_configure_wpa(struct madwifi_driver_data *drv)
 230 {
 231         struct hostapd_data *hapd = drv->hapd;
 232         struct hostapd_bss_config *conf = hapd->conf;
 233         int v;
 234
 235         switch (conf->wpa_group) {
 236         case WPA_CIPHER_CCMP:
 237                 v = IEEE80211_CIPHER_AES_CCM;
 238                 break;
 239         case WPA_CIPHER_TKIP:
 240                 v = IEEE80211_CIPHER_TKIP;
 241                 break;
 242         case WPA_CIPHER_WEP104:
 243                 v = IEEE80211_CIPHER_WEP;
 244                 break;
 245         case WPA_CIPHER_WEP40:
 246                 v = IEEE80211_CIPHER_WEP;
 247                 break;
 248         case WPA_CIPHER_NONE:
 249                 v = IEEE80211_CIPHER_NONE;
 250                 break;
 251         default:
 252                 wpa_printf(MSG_ERROR, "Unknown group key cipher %u",
 253                            conf->wpa_group);
 254                 return -1;
 255         }
 256         wpa_printf(MSG_DEBUG, "%s: group key cipher=%d", __func__, v);
 257         if (set80211param(drv, IEEE80211_PARAM_MCASTCIPHER, v)) {
 258                 printf("Unable to set group key cipher to %u\n", v);
 259                 return -1;
 260         }
 261         if (v == IEEE80211_CIPHER_WEP) {
 262                 /* key length is done only for specific ciphers */
 263                 v = (conf->wpa_group == WPA_CIPHER_WEP104 ? 13 : 5);
 264                 if (set80211param(drv, IEEE80211_PARAM_MCASTKEYLEN, v)) {
 265                         printf("Unable to set group key length to %u\n", v);
 266                         return -1;
 267                 }
 268         }
 269
 270         v = 0;
 271         if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
 272                 v |= 1<<IEEE80211_CIPHER_AES_CCM;
 273         if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
 274                 v |= 1<<IEEE80211_CIPHER_TKIP;
 275         if (conf->wpa_pairwise & WPA_CIPHER_NONE)
 276                 v |= 1<<IEEE80211_CIPHER_NONE;
 277         wpa_printf(MSG_DEBUG, "%s: pairwise key ciphers=0x%x", __func__, v);
 278         if (set80211param(drv, IEEE80211_PARAM_UCASTCIPHERS, v)) {
 279                 printf("Unable to set pairwise key ciphers to 0x%x\n", v);
 280                 return -1;
 281         }
 282
 283         wpa_printf(MSG_DEBUG, "%s: key management algorithms=0x%x",
 284                    __func__, conf->wpa_key_mgmt);
 285         if (set80211param(drv, IEEE80211_PARAM_KEYMGTALGS, conf->wpa_key_mgmt)) {
 286                 printf("Unable to set key management algorithms to 0x%x\n",
 287                         conf->wpa_key_mgmt);
 288                 return -1;
 289         }
 290
 291         v = 0;
 292         if (conf->rsn_preauth)
 293                 v |= BIT(0);
 294         wpa_printf(MSG_DEBUG, "%s: rsn capabilities=0x%x",
 295                    __func__, conf->rsn_preauth);
 296         if (set80211param(drv, IEEE80211_PARAM_RSNCAPS, v)) {
 297                 printf("Unable to set RSN capabilities to 0x%x\n", v);
 298                 return -1;
 299         }
 300
 301         wpa_printf(MSG_DEBUG, "%s: enable WPA=0x%x", __func__, conf->wpa);
 302         if (set80211param(drv, IEEE80211_PARAM_WPA, conf->wpa)) {
 303                 printf("Unable to set WPA to %u\n", conf->wpa);
 304                 return -1;
 305         }
 306         return 0;
 307 }
 308
 309
 310 static int
 311 madwifi_set_iface_flags(void *priv, int dev_up)
 312 {
 313         struct madwifi_driver_data *drv = priv;
 314         struct ifreq ifr;
 315
 316         wpa_printf(MSG_DEBUG, "%s: dev_up=%d", __func__, dev_up);
 317
 318         if (drv->ioctl_sock < 0)
 319                 return -1;
 320
 321         memset(&ifr, 0, sizeof(ifr));
 322         os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
 323
 324         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 325                 perror("ioctl[SIOCGIFFLAGS]");
 326                 return -1;
 327         }
 328
 329         if (dev_up)
 330                 ifr.ifr_flags |= IFF_UP;
 331         else
 332                 ifr.ifr_flags &= ~IFF_UP;
 333
 334         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 335                 perror("ioctl[SIOCSIFFLAGS]");
 336                 return -1;
 337         }
 338
 339         if (dev_up) {
 340                 memset(&ifr, 0, sizeof(ifr));
 341                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
 342                 ifr.ifr_mtu = HOSTAPD_MTU;
 343                 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
 344                         perror("ioctl[SIOCSIFMTU]");
 345                         printf("Setting MTU failed - trying to survive with "
 346                                "current value\n");
 347                 }
 348         }
 349
 350         return 0;
 351 }
 352
 353 static int
 354 madwifi_set_ieee8021x(const char *ifname, void *priv, int enabled)
 355 {
 356         struct madwifi_driver_data *drv = priv;
 357         struct hostapd_data *hapd = drv->hapd;
 358         struct hostapd_bss_config *conf = hapd->conf;
 359
 360         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);
 361
 362         if (!enabled) {
 363                 /* XXX restore state */
 364                 return set80211param(priv, IEEE80211_PARAM_AUTHMODE,
 365                         IEEE80211_AUTH_AUTO);
 366         }
 367         if (!conf->wpa && !conf->ieee802_1x) {
 368                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 369                         HOSTAPD_LEVEL_WARNING, "No 802.1X or WPA enabled!");
 370                 return -1;
 371         }
 372         if (conf->wpa && madwifi_configure_wpa(drv) != 0) {
 373                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 374                         HOSTAPD_LEVEL_WARNING, "Error configuring WPA state!");
 375                 return -1;
 376         }
 377         if (set80211param(priv, IEEE80211_PARAM_AUTHMODE,
 378                 (conf->wpa ?  IEEE80211_AUTH_WPA : IEEE80211_AUTH_8021X))) {
 379                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 380                         HOSTAPD_LEVEL_WARNING, "Error enabling WPA/802.1X!");
 381                 return -1;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static int
 388 madwifi_set_privacy(const char *ifname, void *priv, int enabled)
 389 {
 390         struct madwifi_driver_data *drv = priv;
 391
 392         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);
 393
 394         return set80211param(drv, IEEE80211_PARAM_PRIVACY, enabled);
 395 }
 396
 397 static int
 398 madwifi_set_sta_authorized(void *priv, const u8 *addr, int authorized)
 399 {
 400         struct madwifi_driver_data *drv = priv;
 401         struct ieee80211req_mlme mlme;
 402         int ret;
 403
 404         wpa_printf(MSG_DEBUG, "%s: addr=%s authorized=%d",
 405                    __func__, ether_sprintf(addr), authorized);
 406
 407         if (authorized)
 408                 mlme.im_op = IEEE80211_MLME_AUTHORIZE;
 409         else
 410                 mlme.im_op = IEEE80211_MLME_UNAUTHORIZE;
 411         mlme.im_reason = 0;
 412         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 413         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
 414         if (ret < 0) {
 415                 wpa_printf(MSG_DEBUG, "%s: Failed to %sauthorize STA " MACSTR,
 416                            __func__, authorized ? "" : "un", MAC2STR(addr));
 417         }
 418
 419         return ret;
 420 }
 421
 422 static int
 423 madwifi_sta_set_flags(void *priv, const u8 *addr, int total_flags,
 424                       int flags_or, int flags_and)
 425 {
 426         /* For now, only support setting Authorized flag */
 427         if (flags_or & WLAN_STA_AUTHORIZED)
 428                 return madwifi_set_sta_authorized(priv, addr, 1);
 429         if (!(flags_and & WLAN_STA_AUTHORIZED))
 430                 return madwifi_set_sta_authorized(priv, addr, 0);
 431         return 0;
 432 }
 433
 434 static int
 435 madwifi_del_key(void *priv, const u8 *addr, int key_idx)
 436 {
 437         struct madwifi_driver_data *drv = priv;
 438         struct ieee80211req_del_key wk;
 439         int ret;
 440
 441         wpa_printf(MSG_DEBUG, "%s: addr=%s key_idx=%d",
 442                    __func__, ether_sprintf(addr), key_idx);
 443
 444         memset(&wk, 0, sizeof(wk));
 445         if (addr != NULL) {
 446                 memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
 447                 wk.idk_keyix = (u8) IEEE80211_KEYIX_NONE;
 448         } else {
 449                 wk.idk_keyix = key_idx;
 450         }
 451
 452         ret = set80211priv(drv, IEEE80211_IOCTL_DELKEY, &wk, sizeof(wk));
 453         if (ret < 0) {
 454                 wpa_printf(MSG_DEBUG, "%s: Failed to delete key (addr %s"
 455                            " key_idx %d)", __func__, ether_sprintf(addr),
 456                            key_idx);
 457         }
 458
 459         return ret;
 460 }
 461
 462 static int
 463 madwifi_set_key(const char *ifname, void *priv, const char *alg,
 464                 const u8 *addr, int key_idx,
 465                 const u8 *key, size_t key_len, int txkey)
 466 {
 467         struct madwifi_driver_data *drv = priv;
 468         struct ieee80211req_key wk;
 469         u_int8_t cipher;
 470         int ret;
 471
 472         if (strcmp(alg, "none") == 0)
 473                 return madwifi_del_key(drv, addr, key_idx);
 474
 475         wpa_printf(MSG_DEBUG, "%s: alg=%s addr=%s key_idx=%d",
 476                    __func__, alg, ether_sprintf(addr), key_idx);
 477
 478         if (strcmp(alg, "WEP") == 0)
 479                 cipher = IEEE80211_CIPHER_WEP;
 480         else if (strcmp(alg, "TKIP") == 0)
 481                 cipher = IEEE80211_CIPHER_TKIP;
 482         else if (strcmp(alg, "CCMP") == 0)
 483                 cipher = IEEE80211_CIPHER_AES_CCM;
 484         else {
 485                 printf("%s: unknown/unsupported algorithm %s\n",
 486                         __func__, alg);
 487                 return -1;
 488         }
 489
 490         if (key_len > sizeof(wk.ik_keydata)) {
 491                 printf("%s: key length %lu too big\n", __func__,
 492                        (unsigned long) key_len);
 493                 return -3;
 494         }
 495
 496         memset(&wk, 0, sizeof(wk));
 497         wk.ik_type = cipher;
 498         wk.ik_flags = IEEE80211_KEY_RECV | IEEE80211_KEY_XMIT;
 499         if (addr == NULL) {
 500                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 501                 wk.ik_keyix = key_idx;
 502                 wk.ik_flags |= IEEE80211_KEY_DEFAULT;
 503         } else {
 504                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 505                 wk.ik_keyix = IEEE80211_KEYIX_NONE;
 506         }
 507         wk.ik_keylen = key_len;
 508         memcpy(wk.ik_keydata, key, key_len);
 509
 510         ret = set80211priv(drv, IEEE80211_IOCTL_SETKEY, &wk, sizeof(wk));
 511         if (ret < 0) {
 512                 wpa_printf(MSG_DEBUG, "%s: Failed to set key (addr %s"
 513                            " key_idx %d alg '%s' key_len %lu txkey %d)",
 514                            __func__, ether_sprintf(wk.ik_macaddr), key_idx,
 515                            alg, (unsigned long) key_len, txkey);
 516         }
 517
 518         return ret;
 519 }
 520
 521
 522 static int
 523 madwifi_get_seqnum(const char *ifname, void *priv, const u8 *addr, int idx,
 524                    u8 *seq)
 525 {
 526         struct madwifi_driver_data *drv = priv;
 527         struct ieee80211req_key wk;
 528
 529         wpa_printf(MSG_DEBUG, "%s: addr=%s idx=%d",
 530                    __func__, ether_sprintf(addr), idx);
 531
 532         memset(&wk, 0, sizeof(wk));
 533         if (addr == NULL)
 534                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 535         else
 536                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 537         wk.ik_keyix = idx;
 538
 539         if (set80211priv(drv, IEEE80211_IOCTL_GETKEY, &wk, sizeof(wk))) {
 540                 wpa_printf(MSG_DEBUG, "%s: Failed to get encryption data "
 541                            "(addr " MACSTR " key_idx %d)",
 542                            __func__, MAC2STR(wk.ik_macaddr), idx);
 543                 return -1;
 544         }
 545
 546 #ifdef WORDS_BIGENDIAN
 547         {
 548                 /*
 549                  * wk.ik_keytsc is in host byte order (big endian), need to
 550                  * swap it to match with the byte order used in WPA.
 551                  */
 552                 int i;
 553                 u8 tmp[WPA_KEY_RSC_LEN];
 554                 memcpy(tmp, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
 555                 for (i = 0; i < WPA_KEY_RSC_LEN; i++) {
 556                         seq[i] = tmp[WPA_KEY_RSC_LEN - i - 1];
 557                 }
 558         }
 559 #else /* WORDS_BIGENDIAN */
 560         memcpy(seq, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
 561 #endif /* WORDS_BIGENDIAN */
 562         return 0;
 563 }
 564
 565
 566 static int
 567 madwifi_flush(void *priv)
 568 {
 569 #ifdef MADWIFI_BSD
 570         u8 allsta[IEEE80211_ADDR_LEN];
 571         memset(allsta, 0xff, IEEE80211_ADDR_LEN);
 572         return madwifi_sta_deauth(priv, allsta, IEEE80211_REASON_AUTH_LEAVE);
 573 #else /* MADWIFI_BSD */
 574         return 0;               /* XXX */
 575 #endif /* MADWIFI_BSD */
 576 }
 577
 578
 579 static int
 580 madwifi_read_sta_driver_data(void *priv, struct hostap_sta_driver_data *data,
 581                              const u8 *addr)
 582 {
 583         struct madwifi_driver_data *drv = priv;
 584
 585 #ifdef MADWIFI_BSD
 586         struct ieee80211req_sta_stats stats;
 587
 588         memset(data, 0, sizeof(*data));
 589
 590         /*
 591          * Fetch statistics for station from the system.
 592          */
 593         memset(&stats, 0, sizeof(stats));
 594         memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
 595         if (set80211priv(drv,
 596 #ifdef MADWIFI_NG
 597                          IEEE80211_IOCTL_STA_STATS,
 598 #else /* MADWIFI_NG */
 599                          IEEE80211_IOCTL_GETSTASTATS,
 600 #endif /* MADWIFI_NG */
 601                          &stats, sizeof(stats))) {
 602                 wpa_printf(MSG_DEBUG, "%s: Failed to fetch STA stats (addr "
 603                            MACSTR ")", __func__, MAC2STR(addr));
 604                 if (memcmp(addr, drv->acct_mac, ETH_ALEN) == 0) {
 605                         memcpy(data, &drv->acct_data, sizeof(*data));
 606                         return 0;
 607                 }
 608
 609                 printf("Failed to get station stats information element.\n");
 610                 return -1;
 611         }
 612
 613         data->rx_packets = stats.is_stats.ns_rx_data;
 614         data->rx_bytes = stats.is_stats.ns_rx_bytes;
 615         data->tx_packets = stats.is_stats.ns_tx_data;
 616         data->tx_bytes = stats.is_stats.ns_tx_bytes;
 617         return 0;
 618
 619 #else /* MADWIFI_BSD */
 620
 621         char buf[1024], line[128], *pos;
 622         FILE *f;
 623         unsigned long val;
 624
 625         memset(data, 0, sizeof(*data));
 626         snprintf(buf, sizeof(buf), "/proc/net/madwifi/%s/" MACSTR,
 627                  drv->iface, MAC2STR(addr));
 628
 629         f = fopen(buf, "r");
 630         if (!f) {
 631                 if (memcmp(addr, drv->acct_mac, ETH_ALEN) != 0)
 632                         return -1;
 633                 memcpy(data, &drv->acct_data, sizeof(*data));
 634                 return 0;
 635         }
 636         /* Need to read proc file with in one piece, so use large enough
 637          * buffer. */
 638         setbuffer(f, buf, sizeof(buf));
 639
 640         while (fgets(line, sizeof(line), f)) {
 641                 pos = strchr(line, '=');
 642                 if (!pos)
 643                         continue;
 644                 *pos++ = '\0';
 645                 val = strtoul(pos, NULL, 10);
 646                 if (strcmp(line, "rx_packets") == 0)
 647                         data->rx_packets = val;
 648                 else if (strcmp(line, "tx_packets") == 0)
 649                         data->tx_packets = val;
 650                 else if (strcmp(line, "rx_bytes") == 0)
 651                         data->rx_bytes = val;
 652                 else if (strcmp(line, "tx_bytes") == 0)
 653                         data->tx_bytes = val;
 654         }
 655
 656         fclose(f);
 657
 658         return 0;
 659 #endif /* MADWIFI_BSD */
 660 }
 661
 662
 663 static int
 664 madwifi_sta_clear_stats(void *priv, const u8 *addr)
 665 {
 666 #if defined(MADWIFI_BSD) && defined(IEEE80211_MLME_CLEAR_STATS)
 667         struct madwifi_driver_data *drv = priv;
 668         struct ieee80211req_mlme mlme;
 669         int ret;
 670
 671         wpa_printf(MSG_DEBUG, "%s: addr=%s", __func__, ether_sprintf(addr));
 672
 673         mlme.im_op = IEEE80211_MLME_CLEAR_STATS;
 674         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 675         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme,
 676                            sizeof(mlme));
 677         if (ret < 0) {
 678                 wpa_printf(MSG_DEBUG, "%s: Failed to clear STA stats (addr "
 679                            MACSTR ")", __func__, MAC2STR(addr));
 680         }
 681
 682         return ret;
 683 #else /* MADWIFI_BSD && IEEE80211_MLME_CLEAR_STATS */
 684         return 0; /* FIX */
 685 #endif /* MADWIFI_BSD && IEEE80211_MLME_CLEAR_STATS */
 686 }
 687
 688
 689 static int
 690 madwifi_set_opt_ie(const char *ifname, void *priv, const u8 *ie, size_t ie_len)
 691 {
 692         /*
 693          * Do nothing; we setup parameters at startup that define the
 694          * contents of the beacon information element.
 695          */
 696         return 0;
 697 }
 698
 699 static int
 700 madwifi_sta_deauth(void *priv, const u8 *addr, int reason_code)
 701 {
 702         struct madwifi_driver_data *drv = priv;
 703         struct ieee80211req_mlme mlme;
 704         int ret;
 705
 706         wpa_printf(MSG_DEBUG, "%s: addr=%s reason_code=%d",
 707                    __func__, ether_sprintf(addr), reason_code);
 708
 709         mlme.im_op = IEEE80211_MLME_DEAUTH;
 710         mlme.im_reason = reason_code;
 711         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 712         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
 713         if (ret < 0) {
 714                 wpa_printf(MSG_DEBUG, "%s: Failed to deauth STA (addr " MACSTR
 715                            " reason %d)",
 716                            __func__, MAC2STR(addr), reason_code);
 717         }
 718
 719         return ret;
 720 }
 721
 722 static int
 723 madwifi_sta_disassoc(void *priv, const u8 *addr, int reason_code)
 724 {
 725         struct madwifi_driver_data *drv = priv;
 726         struct ieee80211req_mlme mlme;
 727         int ret;
 728
 729         wpa_printf(MSG_DEBUG, "%s: addr=%s reason_code=%d",
 730                    __func__, ether_sprintf(addr), reason_code);
 731
 732         mlme.im_op = IEEE80211_MLME_DISASSOC;
 733         mlme.im_reason = reason_code;
 734         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 735         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
 736         if (ret < 0) {
 737                 wpa_printf(MSG_DEBUG, "%s: Failed to disassoc STA (addr "
 738                            MACSTR " reason %d)",
 739                            __func__, MAC2STR(addr), reason_code);
 740         }
 741
 742         return ret;
 743 }
 744
 745 #ifdef CONFIG_WPS
 746 #ifdef IEEE80211_IOCTL_FILTERFRAME
 747 static void madwifi_raw_receive(void *ctx, const u8 *src_addr, const u8 *buf,
 748                                 size_t len)
 749 {
 750         struct madwifi_driver_data *drv = ctx;
 751         const struct ieee80211_mgmt *mgmt;
 752         const u8 *end, *ie;
 753         u16 fc;
 754         size_t ie_len;
 755
 756         /* Send Probe Request information to WPS processing */
 757
 758         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 759                 return;
 760         mgmt = (const struct ieee80211_mgmt *) buf;
 761
 762         fc = le_to_host16(mgmt->frame_control);
 763         if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
 764             WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_PROBE_REQ)
 765                 return;
 766
 767         end = buf + len;
 768         ie = mgmt->u.probe_req.variable;
 769         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 770
 771         hostapd_wps_probe_req_rx(drv->hapd, mgmt->sa, ie, ie_len);
 772 }
 773 #endif /* IEEE80211_IOCTL_FILTERFRAME */
 774 #endif /* CONFIG_WPS */
 775
 776 static int madwifi_receive_probe_req(struct madwifi_driver_data *drv)
 777 {
 778         int ret = 0;
 779 #ifdef CONFIG_WPS
 780 #ifdef IEEE80211_IOCTL_FILTERFRAME
 781         struct ieee80211req_set_filter filt;
 782
 783         wpa_printf(MSG_DEBUG, "%s Enter", __func__);
 784         filt.app_filterype = IEEE80211_FILTER_TYPE_PROBE_REQ;
 785
 786         ret = set80211priv(drv, IEEE80211_IOCTL_FILTERFRAME, &filt,
 787                            sizeof(struct ieee80211req_set_filter));
 788         if (ret)
 789                 return ret;
 790
 791         drv->sock_raw = l2_packet_init(drv->iface, NULL, ETH_P_80211_RAW,
 792                                        madwifi_raw_receive, drv, 1);
 793         if (drv->sock_raw == NULL)
 794                 return -1;
 795 #endif /* IEEE80211_IOCTL_FILTERFRAME */
 796 #endif /* CONFIG_WPS */
 797         return ret;
 798 }
 799
 800 static int
 801 madwifi_del_sta(struct madwifi_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 802 {
 803         struct hostapd_data *hapd = drv->hapd;
 804         struct sta_info *sta;
 805
 806         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 807                 HOSTAPD_LEVEL_INFO, "disassociated");
 808
 809         sta = ap_get_sta(hapd, addr);
 810         if (sta != NULL) {
 811                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 812                 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
 813                 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 814                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 815                 ap_free_sta(hapd, sta);
 816         }
 817         return 0;
 818 }
 819
 820 #ifdef CONFIG_WPS
 821 static int
 822 madwifi_set_wps_ie(void *priv, const u8 *ie, size_t len, u32 frametype)
 823 {
 824         struct madwifi_driver_data *drv = priv;
 825         u8 buf[256];
 826         struct ieee80211req_getset_appiebuf *beac_ie;
 827
 828         wpa_printf(MSG_DEBUG, "%s buflen = %lu", __func__,
 829                    (unsigned long) len);
 830
 831         beac_ie = (struct ieee80211req_getset_appiebuf *) buf;
 832         beac_ie->app_frmtype = frametype;
 833         beac_ie->app_buflen = len;
 834         memcpy(&(beac_ie->app_buf[0]), ie, len);
 835
 836         return set80211priv(drv, IEEE80211_IOCTL_SET_APPIEBUF, beac_ie,
 837                             sizeof(struct ieee80211req_getset_appiebuf) + len);
 838 }
 839
 840 static int
 841 madwifi_set_wps_beacon_ie(const char *ifname, void *priv, const u8 *ie,
 842                           size_t len)
 843 {
 844         return madwifi_set_wps_ie(priv, ie, len, IEEE80211_APPIE_FRAME_BEACON);
 845 }
 846
 847 static int
 848 madwifi_set_wps_probe_resp_ie(const char *ifname, void *priv, const u8 *ie,
 849                               size_t len)
 850 {
 851         return madwifi_set_wps_ie(priv, ie, len,
 852                                   IEEE80211_APPIE_FRAME_PROBE_RESP);
 853 }
 854 #else /* CONFIG_WPS */
 855 #define madwifi_set_wps_beacon_ie NULL
 856 #define madwifi_set_wps_probe_resp_ie NULL
 857 #endif /* CONFIG_WPS */
 858
 859 static int
 860 madwifi_process_wpa_ie(struct madwifi_driver_data *drv, struct sta_info *sta)
 861 {
 862         struct hostapd_data *hapd = drv->hapd;
 863         struct ieee80211req_wpaie ie;
 864         int ielen, res;
 865         u8 *iebuf;
 866
 867         /*
 868          * Fetch negotiated WPA/RSN parameters from the system.
 869          */
 870         memset(&ie, 0, sizeof(ie));
 871         memcpy(ie.wpa_macaddr, sta->addr, IEEE80211_ADDR_LEN);
 872         if (set80211priv(drv, IEEE80211_IOCTL_GETWPAIE, &ie, sizeof(ie))) {
 873                 wpa_printf(MSG_ERROR, "%s: Failed to get WPA/RSN IE",
 874                            __func__);
 875                 printf("Failed to get WPA/RSN information element.\n");
 876                 return -1;              /* XXX not right */
 877         }
 878         wpa_hexdump(MSG_MSGDUMP, "madwifi req WPA IE",
 879                     ie.wpa_ie, IEEE80211_MAX_OPT_IE);
 880         iebuf = ie.wpa_ie;
 881         /* madwifi seems to return some random data if WPA/RSN IE is not set.
 882          * Assume the IE was not included if the IE type is unknown. */
 883         if (iebuf[0] != WLAN_EID_VENDOR_SPECIFIC)
 884                 iebuf[1] = 0;
 885 #ifdef MADWIFI_NG
 886         wpa_hexdump(MSG_MSGDUMP, "madwifi req RSN IE",
 887                     ie.rsn_ie, IEEE80211_MAX_OPT_IE);
 888         if (iebuf[1] == 0 && ie.rsn_ie[1] > 0) {
 889                 /* madwifi-ng svn #1453 added rsn_ie. Use it, if wpa_ie was not
 890                  * set. This is needed for WPA2. */
 891                 iebuf = ie.rsn_ie;
 892                 if (iebuf[0] != WLAN_EID_RSN)
 893                         iebuf[1] = 0;
 894         }
 895 #endif /* MADWIFI_NG */
 896         ielen = iebuf[1];
 897         if (ielen == 0) {
 898 #ifdef CONFIG_WPS
 899                 if (hapd->conf->wps_state) {
 900                         wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE "
 901                                    "in (Re)Association Request - possible WPS "
 902                                    "use");
 903                         sta->flags |= WLAN_STA_MAYBE_WPS;
 904                         return 0;
 905                 }
 906 #endif /* CONFIG_WPS */
 907                 printf("No WPA/RSN information element for station!?\n");
 908                 return -1;              /* XXX not right */
 909         }
 910         ielen += 2;
 911         if (sta->wpa_sm == NULL)
 912                 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr);
 913         if (sta->wpa_sm == NULL) {
 914                 printf("Failed to initialize WPA state machine\n");
 915                 return -1;
 916         }
 917         res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 918                                   iebuf, ielen, NULL, 0);
 919         if (res != WPA_IE_OK) {
 920                 printf("WPA/RSN information element rejected? (res %u)\n", res);
 921                 return -1;
 922         }
 923         return 0;
 924 }
 925
 926 static int
 927 madwifi_new_sta(struct madwifi_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 928 {
 929         struct hostapd_data *hapd = drv->hapd;
 930         struct sta_info *sta;
 931         int new_assoc;
 932
 933         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 934                 HOSTAPD_LEVEL_INFO, "associated");
 935
 936         sta = ap_get_sta(hapd, addr);
 937         if (sta) {
 938                 accounting_sta_stop(hapd, sta);
 939         } else {
 940                 sta = ap_sta_add(hapd, addr);
 941                 if (sta == NULL)
 942                         return -1;
 943         }
 944
 945         if (memcmp(addr, drv->acct_mac, ETH_ALEN) == 0) {
 946                 /* Cached accounting data is not valid anymore. */
 947                 memset(drv->acct_mac, 0, ETH_ALEN);
 948                 memset(&drv->acct_data, 0, sizeof(drv->acct_data));
 949         }
 950
 951         if (hapd->conf->wpa) {
 952                 if (madwifi_process_wpa_ie(drv, sta))
 953                         return -1;
 954         }
 955
 956         /*
 957          * Now that the internal station state is setup
 958          * kick the authenticator into action.
 959          */
 960         new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
 961         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
 962         wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
 963         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
 964         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
 965         return 0;
 966 }
 967
 968 static void
 969 madwifi_wireless_event_wireless_custom(struct madwifi_driver_data *drv,
 970                                        char *custom)
 971 {
 972         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
 973
 974         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 975                 char *pos;
 976                 u8 addr[ETH_ALEN];
 977                 pos = strstr(custom, "addr=");
 978                 if (pos == NULL) {
 979                         wpa_printf(MSG_DEBUG,
 980                                    "MLME-MICHAELMICFAILURE.indication "
 981                                    "without sender address ignored");
 982                         return;
 983                 }
 984                 pos += 5;
 985                 if (hwaddr_aton(pos, addr) == 0) {
 986                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
 987                 } else {
 988                         wpa_printf(MSG_DEBUG,
 989                                    "MLME-MICHAELMICFAILURE.indication "
 990                                    "with invalid MAC address");
 991                 }
 992         } else if (strncmp(custom, "STA-TRAFFIC-STAT", 16) == 0) {
 993                 char *key, *value;
 994                 u32 val;
 995                 key = custom;
 996                 while ((key = strchr(key, '\n')) != NULL) {
 997                         key++;
 998                         value = strchr(key, '=');
 999                         if (value == NULL)
1000                                 continue;
1001                         *value++ = '\0';
1002                         val = strtoul(value, NULL, 10);
1003                         if (strcmp(key, "mac") == 0)
1004                                 hwaddr_aton(value, drv->acct_mac);
1005                         else if (strcmp(key, "rx_packets") == 0)
1006                                 drv->acct_data.rx_packets = val;
1007                         else if (strcmp(key, "tx_packets") == 0)
1008                                 drv->acct_data.tx_packets = val;
1009                         else if (strcmp(key, "rx_bytes") == 0)
1010                                 drv->acct_data.rx_bytes = val;
1011                         else if (strcmp(key, "tx_bytes") == 0)
1012                                 drv->acct_data.tx_bytes = val;
1013                         key = value;
1014                 }
1015         }
1016 }
1017
1018 static void
1019 madwifi_wireless_event_wireless(struct madwifi_driver_data *drv,
1020                                             char *data, int len)
1021 {
1022         struct iw_event iwe_buf, *iwe = &iwe_buf;
1023         char *pos, *end, *custom, *buf;
1024
1025         pos = data;
1026         end = data + len;
1027
1028         while (pos + IW_EV_LCP_LEN <= end) {
1029                 /* Event data may be unaligned, so make a local, aligned copy
1030                  * before processing. */
1031                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1032                 wpa_printf(MSG_MSGDUMP, "Wireless event: cmd=0x%x len=%d",
1033                            iwe->cmd, iwe->len);
1034                 if (iwe->len <= IW_EV_LCP_LEN)
1035                         return;
1036
1037                 custom = pos + IW_EV_POINT_LEN;
1038                 if (drv->we_version > 18 &&
1039                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
1040                      iwe->cmd == IWEVCUSTOM)) {
1041                         /* WE-19 removed the pointer from struct iw_point */
1042                         char *dpos = (char *) &iwe_buf.u.data.length;
1043                         int dlen = dpos - (char *) &iwe_buf;
1044                         memcpy(dpos, pos + IW_EV_LCP_LEN,
1045                                sizeof(struct iw_event) - dlen);
1046                 } else {
1047                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1048                         custom += IW_EV_POINT_OFF;
1049                 }
1050
1051                 switch (iwe->cmd) {
1052                 case IWEVEXPIRED:
1053                         madwifi_del_sta(drv, (u8 *) iwe->u.addr.sa_data);
1054                         break;
1055                 case IWEVREGISTERED:
1056                         madwifi_new_sta(drv, (u8 *) iwe->u.addr.sa_data);
1057                         break;
1058                 case IWEVCUSTOM:
1059                         if (custom + iwe->u.data.length > end)
1060                                 return;
1061                         buf = malloc(iwe->u.data.length + 1);
1062                         if (buf == NULL)
1063                                 return;         /* XXX */
1064                         memcpy(buf, custom, iwe->u.data.length);
1065                         buf[iwe->u.data.length] = '\0';
1066                         madwifi_wireless_event_wireless_custom(drv, buf);
1067                         free(buf);
1068                         break;
1069                 }
1070
1071                 pos += iwe->len;
1072         }
1073 }
1074
1075
1076 static void
1077 madwifi_wireless_event_rtm_newlink(struct madwifi_driver_data *drv,
1078                                                struct nlmsghdr *h, int len)
1079 {
1080         struct ifinfomsg *ifi;
1081         int attrlen, nlmsg_len, rta_len;
1082         struct rtattr * attr;
1083
1084         if (len < (int) sizeof(*ifi))
1085                 return;
1086
1087         ifi = NLMSG_DATA(h);
1088
1089         if (ifi->ifi_index != drv->ifindex)
1090                 return;
1091
1092         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
1093
1094         attrlen = h->nlmsg_len - nlmsg_len;
1095         if (attrlen < 0)
1096                 return;
1097
1098         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
1099
1100         rta_len = RTA_ALIGN(sizeof(struct rtattr));
1101         while (RTA_OK(attr, attrlen)) {
1102                 if (attr->rta_type == IFLA_WIRELESS) {
1103                         madwifi_wireless_event_wireless(
1104                                 drv, ((char *) attr) + rta_len,
1105                                 attr->rta_len - rta_len);
1106                 }
1107                 attr = RTA_NEXT(attr, attrlen);
1108         }
1109 }
1110
1111
1112 static void
1113 madwifi_wireless_event_receive(int sock, void *eloop_ctx, void *sock_ctx)
1114 {
1115         char buf[256];
1116         int left;
1117         struct sockaddr_nl from;
1118         socklen_t fromlen;
1119         struct nlmsghdr *h;
1120         struct madwifi_driver_data *drv = eloop_ctx;
1121
1122         fromlen = sizeof(from);
1123         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
1124                         (struct sockaddr *) &from, &fromlen);
1125         if (left < 0) {
1126                 if (errno != EINTR && errno != EAGAIN)
1127                         perror("recvfrom(netlink)");
1128                 return;
1129         }
1130
1131         h = (struct nlmsghdr *) buf;
1132         while (left >= (int) sizeof(*h)) {
1133                 int len, plen;
1134
1135                 len = h->nlmsg_len;
1136                 plen = len - sizeof(*h);
1137                 if (len > left || plen < 0) {
1138                         printf("Malformed netlink message: "
1139                                "len=%d left=%d plen=%d\n",
1140                                len, left, plen);
1141                         break;
1142                 }
1143
1144                 switch (h->nlmsg_type) {
1145                 case RTM_NEWLINK:
1146                         madwifi_wireless_event_rtm_newlink(drv, h, plen);
1147                         break;
1148                 }
1149
1150                 len = NLMSG_ALIGN(len);
1151                 left -= len;
1152                 h = (struct nlmsghdr *) ((char *) h + len);
1153         }
1154
1155         if (left > 0) {
1156                 printf("%d extra bytes in the end of netlink message\n", left);
1157         }
1158 }
1159
1160
1161 static int
1162 madwifi_get_we_version(struct madwifi_driver_data *drv)
1163 {
1164         struct iw_range *range;
1165         struct iwreq iwr;
1166         int minlen;
1167         size_t buflen;
1168
1169         drv->we_version = 0;
1170
1171         /*
1172          * Use larger buffer than struct iw_range in order to allow the
1173          * structure to grow in the future.
1174          */
1175         buflen = sizeof(struct iw_range) + 500;
1176         range = os_zalloc(buflen);
1177         if (range == NULL)
1178                 return -1;
1179
1180         memset(&iwr, 0, sizeof(iwr));
1181         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1182         iwr.u.data.pointer = (caddr_t) range;
1183         iwr.u.data.length = buflen;
1184
1185         minlen = ((char *) &range->enc_capa) - (char *) range +
1186                 sizeof(range->enc_capa);
1187
1188         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1189                 perror("ioctl[SIOCGIWRANGE]");
1190                 free(range);
1191                 return -1;
1192         } else if (iwr.u.data.length >= minlen &&
1193                    range->we_version_compiled >= 18) {
1194                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1195                            "WE(source)=%d enc_capa=0x%x",
1196                            range->we_version_compiled,
1197                            range->we_version_source,
1198                            range->enc_capa);
1199                 drv->we_version = range->we_version_compiled;
1200         }
1201
1202         free(range);
1203         return 0;
1204 }
1205
1206
1207 static int
1208 madwifi_wireless_event_init(void *priv)
1209 {
1210         struct madwifi_driver_data *drv = priv;
1211         int s;
1212         struct sockaddr_nl local;
1213
1214         madwifi_get_we_version(drv);
1215
1216         drv->wext_sock = -1;
1217
1218         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1219         if (s < 0) {
1220                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1221                 return -1;
1222         }
1223
1224         memset(&local, 0, sizeof(local));
1225         local.nl_family = AF_NETLINK;
1226         local.nl_groups = RTMGRP_LINK;
1227         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1228                 perror("bind(netlink)");
1229                 close(s);
1230                 return -1;
1231         }
1232
1233         eloop_register_read_sock(s, madwifi_wireless_event_receive, drv, NULL);
1234         drv->wext_sock = s;
1235
1236         return 0;
1237 }
1238
1239
1240 static void
1241 madwifi_wireless_event_deinit(void *priv)
1242 {
1243         struct madwifi_driver_data *drv = priv;
1244
1245         if (drv != NULL) {
1246                 if (drv->wext_sock < 0)
1247                         return;
1248                 eloop_unregister_read_sock(drv->wext_sock);
1249                 close(drv->wext_sock);
1250         }
1251 }
1252
1253
1254 static int
1255 madwifi_send_eapol(void *priv, const u8 *addr, const u8 *data, size_t data_len,
1256                    int encrypt, const u8 *own_addr)
1257 {
1258         struct madwifi_driver_data *drv = priv;
1259         unsigned char buf[3000];
1260         unsigned char *bp = buf;
1261         struct l2_ethhdr *eth;
1262         size_t len;
1263         int status;
1264
1265         /*
1266          * Prepend the Ethernet header.  If the caller left us
1267          * space at the front we could just insert it but since
1268          * we don't know we copy to a local buffer.  Given the frequency
1269          * and size of frames this probably doesn't matter.
1270          */
1271         len = data_len + sizeof(struct l2_ethhdr);
1272         if (len > sizeof(buf)) {
1273                 bp = malloc(len);
1274                 if (bp == NULL) {
1275                         printf("EAPOL frame discarded, cannot malloc temp "
1276                                "buffer of size %lu!\n", (unsigned long) len);
1277                         return -1;
1278                 }
1279         }
1280         eth = (struct l2_ethhdr *) bp;
1281         memcpy(eth->h_dest, addr, ETH_ALEN);
1282         memcpy(eth->h_source, own_addr, ETH_ALEN);
1283         eth->h_proto = htons(ETH_P_EAPOL);
1284         memcpy(eth+1, data, data_len);
1285
1286         wpa_hexdump(MSG_MSGDUMP, "TX EAPOL", bp, len);
1287
1288         status = l2_packet_send(drv->sock_xmit, addr, ETH_P_EAPOL, bp, len);
1289
1290         if (bp != buf)
1291                 free(bp);
1292         return status;
1293 }
1294
1295 static void
1296 handle_read(void *ctx, const u8 *src_addr, const u8 *buf, size_t len)
1297 {
1298         struct madwifi_driver_data *drv = ctx;
1299         struct hostapd_data *hapd = drv->hapd;
1300         struct sta_info *sta;
1301
1302         sta = ap_get_sta(hapd, src_addr);
1303         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1304                 printf("Data frame from not associated STA %s\n",
1305                        ether_sprintf(src_addr));
1306                 /* XXX cannot happen */
1307                 return;
1308         }
1309         ieee802_1x_receive(hapd, src_addr, buf + sizeof(struct l2_ethhdr),
1310                            len - sizeof(struct l2_ethhdr));
1311 }
1312
1313 static void *
1314 madwifi_init(struct hostapd_data *hapd)
1315 {
1316         struct madwifi_driver_data *drv;
1317         struct ifreq ifr;
1318         struct iwreq iwr;
1319
1320         drv = os_zalloc(sizeof(struct madwifi_driver_data));
1321         if (drv == NULL) {
1322                 printf("Could not allocate memory for madwifi driver data\n");
1323                 return NULL;
1324         }
1325
1326         drv->hapd = hapd;
1327         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1328         if (drv->ioctl_sock < 0) {
1329                 perror("socket[PF_INET,SOCK_DGRAM]");
1330                 goto bad;
1331         }
1332         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
1333
1334         memset(&ifr, 0, sizeof(ifr));
1335         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1336         if (ioctl(drv->ioctl_sock, SIOCGIFINDEX, &ifr) != 0) {
1337                 perror("ioctl(SIOCGIFINDEX)");
1338                 goto bad;
1339         }
1340         drv->ifindex = ifr.ifr_ifindex;
1341
1342         drv->sock_xmit = l2_packet_init(drv->iface, NULL, ETH_P_EAPOL,
1343                                         handle_read, drv, 1);
1344         if (drv->sock_xmit == NULL)
1345                 goto bad;
1346         if (l2_packet_get_own_addr(drv->sock_xmit, hapd->own_addr))
1347                 goto bad;
1348         if (hapd->conf->bridge[0] != '\0') {
1349                 wpa_printf(MSG_DEBUG, "Configure bridge %s for EAPOL traffic.",
1350                            hapd->conf->bridge);
1351                 drv->sock_recv = l2_packet_init(hapd->conf->bridge, NULL,
1352                                                 ETH_P_EAPOL, handle_read, drv,
1353                                                 1);
1354                 if (drv->sock_recv == NULL)
1355                         goto bad;
1356         } else
1357                 drv->sock_recv = drv->sock_xmit;
1358
1359         memset(&iwr, 0, sizeof(iwr));
1360         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1361
1362         iwr.u.mode = IW_MODE_MASTER;
1363
1364         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0) {
1365                 perror("ioctl[SIOCSIWMODE]");
1366                 printf("Could not set interface to master mode!\n");
1367                 goto bad;
1368         }
1369
1370         madwifi_set_iface_flags(drv, 0);        /* mark down during setup */
1371         madwifi_set_privacy(drv->iface, drv, 0); /* default to no privacy */
1372
1373         madwifi_receive_probe_req(drv);
1374
1375         return drv;
1376 bad:
1377         if (drv->sock_xmit != NULL)
1378                 l2_packet_deinit(drv->sock_xmit);
1379         if (drv->ioctl_sock >= 0)
1380                 close(drv->ioctl_sock);
1381         if (drv != NULL)
1382                 free(drv);
1383         return NULL;
1384 }
1385
1386
1387 static void
1388 madwifi_deinit(void *priv)
1389 {
1390         struct madwifi_driver_data *drv = priv;
1391
1392         (void) madwifi_set_iface_flags(drv, 0);
1393         if (drv->ioctl_sock >= 0)
1394                 close(drv->ioctl_sock);
1395         if (drv->sock_recv != NULL && drv->sock_recv != drv->sock_xmit)
1396                 l2_packet_deinit(drv->sock_recv);
1397         if (drv->sock_xmit != NULL)
1398                 l2_packet_deinit(drv->sock_xmit);
1399         if (drv->sock_raw)
1400                 l2_packet_deinit(drv->sock_raw);
1401         free(drv);
1402 }
1403
1404 static int
1405 madwifi_set_ssid(const char *ifname, void *priv, const u8 *buf, int len)
1406 {
1407         struct madwifi_driver_data *drv = priv;
1408         struct iwreq iwr;
1409
1410         memset(&iwr, 0, sizeof(iwr));
1411         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1412         iwr.u.essid.flags = 1; /* SSID active */
1413         iwr.u.essid.pointer = (caddr_t) buf;
1414         iwr.u.essid.length = len + 1;
1415
1416         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
1417                 perror("ioctl[SIOCSIWESSID]");
1418                 printf("len=%d\n", len);
1419                 return -1;
1420         }
1421         return 0;
1422 }
1423
1424 static int
1425 madwifi_get_ssid(const char *ifname, void *priv, u8 *buf, int len)
1426 {
1427         struct madwifi_driver_data *drv = priv;
1428         struct iwreq iwr;
1429         int ret = 0;
1430
1431         memset(&iwr, 0, sizeof(iwr));
1432         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1433         iwr.u.essid.pointer = (caddr_t) buf;
1434         iwr.u.essid.length = len;
1435
1436         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
1437                 perror("ioctl[SIOCGIWESSID]");
1438                 ret = -1;
1439         } else
1440                 ret = iwr.u.essid.length;
1441
1442         return ret;
1443 }
1444
1445 static int
1446 madwifi_set_countermeasures(void *priv, int enabled)
1447 {
1448         struct madwifi_driver_data *drv = priv;
1449         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
1450         return set80211param(drv, IEEE80211_PARAM_COUNTERMEASURES, enabled);
1451 }
1452
1453 static int
1454 madwifi_commit(void *priv)
1455 {
1456         return madwifi_set_iface_flags(priv, 1);
1457 }
1458
1459 const struct wpa_driver_ops wpa_driver_madwifi_ops = {
1460         .name                   = "madwifi",
1461         .init                   = madwifi_init,
1462         .deinit                 = madwifi_deinit,
1463         .set_ieee8021x          = madwifi_set_ieee8021x,
1464         .set_privacy            = madwifi_set_privacy,
1465         .set_encryption         = madwifi_set_key,
1466         .get_seqnum             = madwifi_get_seqnum,
1467         .flush                  = madwifi_flush,
1468         .set_generic_elem       = madwifi_set_opt_ie,
1469         .wireless_event_init    = madwifi_wireless_event_init,
1470         .wireless_event_deinit  = madwifi_wireless_event_deinit,
1471         .sta_set_flags          = madwifi_sta_set_flags,
1472         .read_sta_data          = madwifi_read_sta_driver_data,
1473         .send_eapol             = madwifi_send_eapol,
1474         .sta_disassoc           = madwifi_sta_disassoc,
1475         .sta_deauth             = madwifi_sta_deauth,
1476         .set_ssid               = madwifi_set_ssid,
1477         .get_ssid               = madwifi_get_ssid,
1478         .set_countermeasures    = madwifi_set_countermeasures,
1479         .sta_clear_stats        = madwifi_sta_clear_stats,
1480         .commit                 = madwifi_commit,
1481         .set_wps_beacon_ie      = madwifi_set_wps_beacon_ie,
1482         .set_wps_probe_resp_ie  = madwifi_set_wps_probe_resp_ie,
1483 };