contrib/hostapd/hostapd/driver_atheros.c

   1 /*
   2  * hostapd / Driver interaction with Atheros 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  * Copyright (c) 2009, Atheros Communications
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Alternatively, this software may be distributed under the terms of BSD
  13  * license.
  14  *
  15  * See README and COPYING for more details.
  16  */
  17
  18 #include "includes.h"
  19 #include <net/if.h>
  20 #include <sys/ioctl.h>
  21
  22 #include "common.h"
  23 #ifndef _BYTE_ORDER
  24 #ifdef WORDS_BIGENDIAN
  25 #define _BYTE_ORDER _BIG_ENDIAN
  26 #else
  27 #define _BYTE_ORDER _LITTLE_ENDIAN
  28 #endif
  29 #endif /* _BYTE_ORDER */
  30
  31 #include <net80211/ieee80211.h>
  32 #include <net80211/_ieee80211.h>
  33 #include <net80211/ieee80211_crypto.h>
  34
  35 /*
  36  * Note, the ATH_WPS_IE setting must match with the driver build.. If the
  37  * driver does not include this, the IEEE80211_IOCTL_GETWPAIE ioctl will fail.
  38  */
  39 #define ATH_WPS_IE
  40 #include <net80211/ieee80211_ioctl.h>
  41
  42 #ifdef CONFIG_WPS
  43 #ifdef IEEE80211_IOCTL_FILTERFRAME
  44 #include <netpacket/packet.h>
  45
  46 #ifndef ETH_P_80211_RAW
  47 #define ETH_P_80211_RAW 0x0019
  48 #endif
  49 #endif /* IEEE80211_IOCTL_FILTERFRAME */
  50 #endif /* CONFIG_WPS */
  51
  52 /*
  53  * Avoid conflicts with hostapd definitions by undefining couple of defines
  54  * from madwifi header files.
  55  */
  56 #undef WPA_OUI_TYPE
  57 #undef WME_OUI_TYPE
  58
  59 #include "wireless_copy.h"
  60
  61 #include "hostapd.h"
  62 #include "driver.h"
  63 #include "eloop.h"
  64 #include "priv_netlink.h"
  65 #include "l2_packet/l2_packet.h"
  66
  67 #include "wps_hostapd.h"
  68 #include "ieee802_11_defs.h"
  69
  70
  71 struct madwifi_driver_data {
  72         struct hostapd_data *hapd;              /* back pointer */
  73
  74         char    iface[IFNAMSIZ + 1];
  75         int     ifindex;
  76         struct l2_packet_data *sock_xmit;       /* raw packet xmit socket */
  77         struct l2_packet_data *sock_recv;       /* raw packet recv socket */
  78         int     ioctl_sock;                     /* socket for ioctl() use */
  79         int     wext_sock;                      /* socket for wireless events */
  80         int     we_version;
  81         u8      acct_mac[ETH_ALEN];
  82         struct hostap_sta_driver_data acct_data;
  83
  84         struct l2_packet_data *sock_raw; /* raw 802.11 management frames */
  85 };
  86
  87 static int madwifi_sta_deauth(void *priv, const u8 *addr, int reason_code);
  88
  89 /* hostapd 0.7.x compatibility - START */
  90 #include "ieee802_1x.h"
  91 #include "sta_info.h"
  92 #include "wpa.h"
  93 #include "radius/radius.h"
  94 #include "ieee802_11.h"
  95 #include "accounting.h"
  96
  97 static int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
  98                                const u8 *ie, size_t ielen)
  99 {
 100         struct sta_info *sta;
 101         int new_assoc, res;
 102
 103         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 104                        HOSTAPD_LEVEL_INFO, "associated");
 105
 106         sta = ap_get_sta(hapd, addr);
 107         if (sta) {
 108                 accounting_sta_stop(hapd, sta);
 109         } else {
 110                 sta = ap_sta_add(hapd, addr);
 111                 if (sta == NULL)
 112                         return -1;
 113         }
 114         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
 115
 116         if (hapd->conf->wpa) {
 117                 if (ie == NULL || ielen == 0) {
 118                         if (hapd->conf->wps_state) {
 119                                 wpa_printf(MSG_DEBUG, "STA did not include "
 120                                            "WPA/RSN IE in (Re)Association "
 121                                            "Request - possible WPS use");
 122                                 sta->flags |= WLAN_STA_MAYBE_WPS;
 123                                 goto skip_wpa_check;
 124                         }
 125
 126                         wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
 127                         return -1;
 128                 }
 129                 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
 130                     os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
 131                         sta->flags |= WLAN_STA_WPS;
 132                         goto skip_wpa_check;
 133                 }
 134
 135                 if (sta->wpa_sm == NULL)
 136                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 137                                                         sta->addr);
 138                 if (sta->wpa_sm == NULL) {
 139                         wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
 140                                    "machine");
 141                         return -1;
 142                 }
 143                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 144                                           ie, ielen, NULL, 0);
 145                 if (res != WPA_IE_OK) {
 146                         wpa_printf(MSG_DEBUG, "WPA/RSN information element "
 147                                    "rejected? (res %u)", res);
 148                         wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
 149                         return -1;
 150                 }
 151         } else if (hapd->conf->wps_state) {
 152                 if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
 153                     os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
 154                         sta->flags |= WLAN_STA_WPS;
 155                 } else
 156                         sta->flags |= WLAN_STA_MAYBE_WPS;
 157         }
 158 skip_wpa_check:
 159
 160         new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
 161         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
 162         wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
 163
 164         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
 165
 166         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
 167
 168         return 0;
 169 }
 170
 171
 172 static void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
 173 {
 174         struct sta_info *sta;
 175
 176         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 177                        HOSTAPD_LEVEL_INFO, "disassociated");
 178
 179         sta = ap_get_sta(hapd, addr);
 180         if (sta == NULL) {
 181                 wpa_printf(MSG_DEBUG, "Disassociation notification for "
 182                            "unknown STA " MACSTR, MAC2STR(addr));
 183                 return;
 184         }
 185
 186         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 187         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
 188         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 189         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 190         ap_free_sta(hapd, sta);
 191 }
 192
 193
 194 static void hostapd_eapol_receive(struct hostapd_data *hapd, const u8 *sa,
 195                                   const u8 *buf, size_t len)
 196 {
 197         ieee802_1x_receive(hapd, sa, buf, len);
 198 }
 199
 200
 201 static void hostapd_michael_mic_failure(struct hostapd_data *hapd,
 202                                         const u8 *addr)
 203 {
 204         ieee80211_michael_mic_failure(hapd, addr, 1);
 205 }
 206 /* hostapd 0.7.x compatibility - END */
 207
 208 static int
 209 set80211priv(struct madwifi_driver_data *drv, int op, void *data, int len)
 210 {
 211         struct iwreq iwr;
 212         int do_inline = len < IFNAMSIZ;
 213
 214         /* Certain ioctls must use the non-inlined method */
 215         if (op == IEEE80211_IOCTL_SET_APPIEBUF ||
 216             op == IEEE80211_IOCTL_FILTERFRAME)
 217                 do_inline = 0;
 218
 219         memset(&iwr, 0, sizeof(iwr));
 220         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 221         if (do_inline) {
 222                 /*
 223                  * Argument data fits inline; put it there.
 224                  */
 225                 memcpy(iwr.u.name, data, len);
 226         } else {
 227                 /*
 228                  * Argument data too big for inline transfer; setup a
 229                  * parameter block instead; the kernel will transfer
 230                  * the data for the driver.
 231                  */
 232                 iwr.u.data.pointer = data;
 233                 iwr.u.data.length = len;
 234         }
 235
 236         if (ioctl(drv->ioctl_sock, op, &iwr) < 0) {
 237                 int first = IEEE80211_IOCTL_SETPARAM;
 238                 static const char *opnames[] = {
 239                         "ioctl[IEEE80211_IOCTL_SETPARAM]",
 240                         "ioctl[IEEE80211_IOCTL_GETPARAM]",
 241                         "ioctl[IEEE80211_IOCTL_SETKEY]",
 242                         "ioctl[IEEE80211_IOCTL_SETWMMPARAMS]",
 243                         "ioctl[IEEE80211_IOCTL_DELKEY]",
 244                         "ioctl[IEEE80211_IOCTL_GETWMMPARAMS]",
 245                         "ioctl[IEEE80211_IOCTL_SETMLME]",
 246                         "ioctl[IEEE80211_IOCTL_GETCHANINFO]",
 247                         "ioctl[IEEE80211_IOCTL_SETOPTIE]",
 248                         "ioctl[IEEE80211_IOCTL_GETOPTIE]",
 249                         "ioctl[IEEE80211_IOCTL_ADDMAC]",
 250                         "ioctl[IEEE80211_IOCTL_DELMAC]",
 251                         "ioctl[IEEE80211_IOCTL_GETCHANLIST]",
 252                         "ioctl[IEEE80211_IOCTL_SETCHANLIST]",
 253                         "ioctl[IEEE80211_IOCTL_KICKMAC]",
 254                         "ioctl[IEEE80211_IOCTL_CHANSWITCH]",
 255                         "ioctl[IEEE80211_IOCTL_GETMODE]",
 256                         "ioctl[IEEE80211_IOCTL_SETMODE]",
 257                         "ioctl[IEEE80211_IOCTL_GET_APPIEBUF]",
 258                         "ioctl[IEEE80211_IOCTL_SET_APPIEBUF]",
 259                         NULL,
 260                         "ioctl[IEEE80211_IOCTL_FILTERFRAME]",
 261                 };
 262                 int idx = op - first;
 263                 if (first <= op &&
 264                     idx < (int) (sizeof(opnames) / sizeof(opnames[0])) &&
 265                     opnames[idx])
 266                         perror(opnames[idx]);
 267                 else {
 268                         perror("ioctl[unknown???]");
 269                         wpa_printf(MSG_DEBUG, "Failed ioctl: 0x%x", op);
 270                 }
 271                 return -1;
 272         }
 273         return 0;
 274 }
 275
 276 static int
 277 set80211param(struct madwifi_driver_data *drv, int op, int arg)
 278 {
 279         struct iwreq iwr;
 280
 281         memset(&iwr, 0, sizeof(iwr));
 282         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
 283         iwr.u.mode = op;
 284         memcpy(iwr.u.name+sizeof(__u32), &arg, sizeof(arg));
 285
 286         if (ioctl(drv->ioctl_sock, IEEE80211_IOCTL_SETPARAM, &iwr) < 0) {
 287                 perror("ioctl[IEEE80211_IOCTL_SETPARAM]");
 288                 wpa_printf(MSG_DEBUG, "%s: Failed to set parameter (op %d "
 289                            "arg %d)", __func__, op, arg);
 290                 return -1;
 291         }
 292         return 0;
 293 }
 294
 295 #ifndef CONFIG_NO_STDOUT_DEBUG
 296 static const char *
 297 ether_sprintf(const u8 *addr)
 298 {
 299         static char buf[sizeof(MACSTR)];
 300
 301         if (addr != NULL)
 302                 snprintf(buf, sizeof(buf), MACSTR, MAC2STR(addr));
 303         else
 304                 snprintf(buf, sizeof(buf), MACSTR, 0,0,0,0,0,0);
 305         return buf;
 306 }
 307 #endif /* CONFIG_NO_STDOUT_DEBUG */
 308
 309 /*
 310  * Configure WPA parameters.
 311  */
 312 static int
 313 madwifi_configure_wpa(struct madwifi_driver_data *drv)
 314 {
 315         struct hostapd_data *hapd = drv->hapd;
 316         struct hostapd_bss_config *conf = hapd->conf;
 317         int v;
 318
 319         switch (conf->wpa_group) {
 320         case WPA_CIPHER_CCMP:
 321                 v = IEEE80211_CIPHER_AES_CCM;
 322                 break;
 323         case WPA_CIPHER_TKIP:
 324                 v = IEEE80211_CIPHER_TKIP;
 325                 break;
 326         case WPA_CIPHER_WEP104:
 327                 v = IEEE80211_CIPHER_WEP;
 328                 break;
 329         case WPA_CIPHER_WEP40:
 330                 v = IEEE80211_CIPHER_WEP;
 331                 break;
 332         case WPA_CIPHER_NONE:
 333                 v = IEEE80211_CIPHER_NONE;
 334                 break;
 335         default:
 336                 wpa_printf(MSG_ERROR, "Unknown group key cipher %u",
 337                            conf->wpa_group);
 338                 return -1;
 339         }
 340         wpa_printf(MSG_DEBUG, "%s: group key cipher=%d", __func__, v);
 341         if (set80211param(drv, IEEE80211_PARAM_MCASTCIPHER, v)) {
 342                 printf("Unable to set group key cipher to %u\n", v);
 343                 return -1;
 344         }
 345         if (v == IEEE80211_CIPHER_WEP) {
 346                 /* key length is done only for specific ciphers */
 347                 v = (conf->wpa_group == WPA_CIPHER_WEP104 ? 13 : 5);
 348                 if (set80211param(drv, IEEE80211_PARAM_MCASTKEYLEN, v)) {
 349                         printf("Unable to set group key length to %u\n", v);
 350                         return -1;
 351                 }
 352         }
 353
 354         v = 0;
 355         if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
 356                 v |= 1<<IEEE80211_CIPHER_AES_CCM;
 357         if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
 358                 v |= 1<<IEEE80211_CIPHER_TKIP;
 359         if (conf->wpa_pairwise & WPA_CIPHER_NONE)
 360                 v |= 1<<IEEE80211_CIPHER_NONE;
 361         wpa_printf(MSG_DEBUG, "%s: pairwise key ciphers=0x%x", __func__, v);
 362         if (set80211param(drv, IEEE80211_PARAM_UCASTCIPHERS, v)) {
 363                 printf("Unable to set pairwise key ciphers to 0x%x\n", v);
 364                 return -1;
 365         }
 366
 367         wpa_printf(MSG_DEBUG, "%s: key management algorithms=0x%x",
 368                    __func__, conf->wpa_key_mgmt);
 369         if (set80211param(drv, IEEE80211_PARAM_KEYMGTALGS, conf->wpa_key_mgmt)) {
 370                 printf("Unable to set key management algorithms to 0x%x\n",
 371                         conf->wpa_key_mgmt);
 372                 return -1;
 373         }
 374
 375         v = 0;
 376         if (conf->rsn_preauth)
 377                 v |= BIT(0);
 378         wpa_printf(MSG_DEBUG, "%s: rsn capabilities=0x%x",
 379                    __func__, conf->rsn_preauth);
 380         if (set80211param(drv, IEEE80211_PARAM_RSNCAPS, v)) {
 381                 printf("Unable to set RSN capabilities to 0x%x\n", v);
 382                 return -1;
 383         }
 384
 385         wpa_printf(MSG_DEBUG, "%s: enable WPA=0x%x", __func__, conf->wpa);
 386         if (set80211param(drv, IEEE80211_PARAM_WPA, conf->wpa)) {
 387                 printf("Unable to set WPA to %u\n", conf->wpa);
 388                 return -1;
 389         }
 390         return 0;
 391 }
 392
 393
 394 static int
 395 madwifi_set_iface_flags(void *priv, int dev_up)
 396 {
 397         struct madwifi_driver_data *drv = priv;
 398         struct ifreq ifr;
 399
 400         wpa_printf(MSG_DEBUG, "%s: dev_up=%d", __func__, dev_up);
 401
 402         if (drv->ioctl_sock < 0)
 403                 return -1;
 404
 405         memset(&ifr, 0, sizeof(ifr));
 406         os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
 407
 408         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 409                 perror("ioctl[SIOCGIFFLAGS]");
 410                 return -1;
 411         }
 412
 413         if (dev_up)
 414                 ifr.ifr_flags |= IFF_UP;
 415         else
 416                 ifr.ifr_flags &= ~IFF_UP;
 417
 418         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 419                 perror("ioctl[SIOCSIFFLAGS]");
 420                 return -1;
 421         }
 422
 423         if (dev_up) {
 424                 memset(&ifr, 0, sizeof(ifr));
 425                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
 426                 ifr.ifr_mtu = HOSTAPD_MTU;
 427                 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
 428                         perror("ioctl[SIOCSIFMTU]");
 429                         printf("Setting MTU failed - trying to survive with "
 430                                "current value\n");
 431                 }
 432         }
 433
 434         return 0;
 435 }
 436
 437 static int
 438 madwifi_set_ieee8021x(const char *ifname, void *priv, int enabled)
 439 {
 440         struct madwifi_driver_data *drv = priv;
 441         struct hostapd_data *hapd = drv->hapd;
 442         struct hostapd_bss_config *conf = hapd->conf;
 443
 444         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);
 445
 446         if (!enabled) {
 447                 /* XXX restore state */
 448                 return set80211param(priv, IEEE80211_PARAM_AUTHMODE,
 449                         IEEE80211_AUTH_AUTO);
 450         }
 451         if (!conf->wpa && !conf->ieee802_1x) {
 452                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 453                         HOSTAPD_LEVEL_WARNING, "No 802.1X or WPA enabled!");
 454                 return -1;
 455         }
 456         if (conf->wpa && madwifi_configure_wpa(drv) != 0) {
 457                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 458                         HOSTAPD_LEVEL_WARNING, "Error configuring WPA state!");
 459                 return -1;
 460         }
 461         if (set80211param(priv, IEEE80211_PARAM_AUTHMODE,
 462                 (conf->wpa ?  IEEE80211_AUTH_WPA : IEEE80211_AUTH_8021X))) {
 463                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
 464                         HOSTAPD_LEVEL_WARNING, "Error enabling WPA/802.1X!");
 465                 return -1;
 466         }
 467
 468         return 0;
 469 }
 470
 471 static int
 472 madwifi_set_privacy(const char *ifname, void *priv, int enabled)
 473 {
 474         struct madwifi_driver_data *drv = priv;
 475
 476         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);
 477
 478         return set80211param(drv, IEEE80211_PARAM_PRIVACY, enabled);
 479 }
 480
 481 static int
 482 madwifi_set_sta_authorized(void *priv, const u8 *addr, int authorized)
 483 {
 484         struct madwifi_driver_data *drv = priv;
 485         struct ieee80211req_mlme mlme;
 486         int ret;
 487
 488         wpa_printf(MSG_DEBUG, "%s: addr=%s authorized=%d",
 489                    __func__, ether_sprintf(addr), authorized);
 490
 491         if (authorized)
 492                 mlme.im_op = IEEE80211_MLME_AUTHORIZE;
 493         else
 494                 mlme.im_op = IEEE80211_MLME_UNAUTHORIZE;
 495         mlme.im_reason = 0;
 496         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 497         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
 498         if (ret < 0) {
 499                 wpa_printf(MSG_DEBUG, "%s: Failed to %sauthorize STA " MACSTR,
 500                            __func__, authorized ? "" : "un", MAC2STR(addr));
 501         }
 502
 503         return ret;
 504 }
 505
 506 static int
 507 madwifi_sta_set_flags(void *priv, const u8 *addr, int total_flags,
 508                       int flags_or, int flags_and)
 509 {
 510         /* For now, only support setting Authorized flag */
 511         if (flags_or & WLAN_STA_AUTHORIZED)
 512                 return madwifi_set_sta_authorized(priv, addr, 1);
 513         if (!(flags_and & WLAN_STA_AUTHORIZED))
 514                 return madwifi_set_sta_authorized(priv, addr, 0);
 515         return 0;
 516 }
 517
 518 static int
 519 madwifi_del_key(void *priv, const u8 *addr, int key_idx)
 520 {
 521         struct madwifi_driver_data *drv = priv;
 522         struct ieee80211req_del_key wk;
 523         int ret;
 524
 525         wpa_printf(MSG_DEBUG, "%s: addr=%s key_idx=%d",
 526                    __func__, ether_sprintf(addr), key_idx);
 527
 528         memset(&wk, 0, sizeof(wk));
 529         if (addr != NULL) {
 530                 memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
 531                 wk.idk_keyix = (u8) IEEE80211_KEYIX_NONE;
 532         } else {
 533                 wk.idk_keyix = key_idx;
 534         }
 535
 536         ret = set80211priv(drv, IEEE80211_IOCTL_DELKEY, &wk, sizeof(wk));
 537         if (ret < 0) {
 538                 wpa_printf(MSG_DEBUG, "%s: Failed to delete key (addr %s"
 539                            " key_idx %d)", __func__, ether_sprintf(addr),
 540                            key_idx);
 541         }
 542
 543         return ret;
 544 }
 545
 546 static int
 547 madwifi_set_key(const char *ifname, void *priv, const char *alg,
 548                 const u8 *addr, int key_idx,
 549                 const u8 *key, size_t key_len, int txkey)
 550 {
 551         struct madwifi_driver_data *drv = priv;
 552         struct ieee80211req_key wk;
 553         u_int8_t cipher;
 554         int ret;
 555
 556         if (strcmp(alg, "none") == 0)
 557                 return madwifi_del_key(drv, addr, key_idx);
 558
 559         wpa_printf(MSG_DEBUG, "%s: alg=%s addr=%s key_idx=%d",
 560                    __func__, alg, ether_sprintf(addr), key_idx);
 561
 562         if (strcmp(alg, "WEP") == 0)
 563                 cipher = IEEE80211_CIPHER_WEP;
 564         else if (strcmp(alg, "TKIP") == 0)
 565                 cipher = IEEE80211_CIPHER_TKIP;
 566         else if (strcmp(alg, "CCMP") == 0)
 567                 cipher = IEEE80211_CIPHER_AES_CCM;
 568         else {
 569                 printf("%s: unknown/unsupported algorithm %s\n",
 570                         __func__, alg);
 571                 return -1;
 572         }
 573
 574         if (key_len > sizeof(wk.ik_keydata)) {
 575                 printf("%s: key length %lu too big\n", __func__,
 576                        (unsigned long) key_len);
 577                 return -3;
 578         }
 579
 580         memset(&wk, 0, sizeof(wk));
 581         wk.ik_type = cipher;
 582         wk.ik_flags = IEEE80211_KEY_RECV | IEEE80211_KEY_XMIT;
 583         if (addr == NULL) {
 584                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 585                 wk.ik_keyix = key_idx;
 586                 wk.ik_flags |= IEEE80211_KEY_DEFAULT;
 587         } else {
 588                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 589                 wk.ik_keyix = IEEE80211_KEYIX_NONE;
 590         }
 591         wk.ik_keylen = key_len;
 592         memcpy(wk.ik_keydata, key, key_len);
 593
 594         ret = set80211priv(drv, IEEE80211_IOCTL_SETKEY, &wk, sizeof(wk));
 595         if (ret < 0) {
 596                 wpa_printf(MSG_DEBUG, "%s: Failed to set key (addr %s"
 597                            " key_idx %d alg '%s' key_len %lu txkey %d)",
 598                            __func__, ether_sprintf(wk.ik_macaddr), key_idx,
 599                            alg, (unsigned long) key_len, txkey);
 600         }
 601
 602         return ret;
 603 }
 604
 605
 606 static int
 607 madwifi_get_seqnum(const char *ifname, void *priv, const u8 *addr, int idx,
 608                    u8 *seq)
 609 {
 610         struct madwifi_driver_data *drv = priv;
 611         struct ieee80211req_key wk;
 612
 613         wpa_printf(MSG_DEBUG, "%s: addr=%s idx=%d",
 614                    __func__, ether_sprintf(addr), idx);
 615
 616         memset(&wk, 0, sizeof(wk));
 617         if (addr == NULL)
 618                 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
 619         else
 620                 memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
 621         wk.ik_keyix = idx;
 622
 623         if (set80211priv(drv, IEEE80211_IOCTL_GETKEY, &wk, sizeof(wk))) {
 624                 wpa_printf(MSG_DEBUG, "%s: Failed to get encryption data "
 625                            "(addr " MACSTR " key_idx %d)",
 626                            __func__, MAC2STR(wk.ik_macaddr), idx);
 627                 return -1;
 628         }
 629
 630 #ifdef WORDS_BIGENDIAN
 631         {
 632                 /*
 633                  * wk.ik_keytsc is in host byte order (big endian), need to
 634                  * swap it to match with the byte order used in WPA.
 635                  */
 636                 int i;
 637                 u8 tmp[WPA_KEY_RSC_LEN];
 638                 memcpy(tmp, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
 639                 for (i = 0; i < WPA_KEY_RSC_LEN; i++) {
 640                         seq[i] = tmp[WPA_KEY_RSC_LEN - i - 1];
 641                 }
 642         }
 643 #else /* WORDS_BIGENDIAN */
 644         memcpy(seq, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
 645 #endif /* WORDS_BIGENDIAN */
 646         return 0;
 647 }
 648
 649
 650 static int
 651 madwifi_flush(void *priv)
 652 {
 653         u8 allsta[IEEE80211_ADDR_LEN];
 654         memset(allsta, 0xff, IEEE80211_ADDR_LEN);
 655         return madwifi_sta_deauth(priv, allsta, IEEE80211_REASON_AUTH_LEAVE);
 656 }
 657
 658
 659 static int
 660 madwifi_read_sta_driver_data(void *priv, struct hostap_sta_driver_data *data,
 661                              const u8 *addr)
 662 {
 663         struct madwifi_driver_data *drv = priv;
 664         struct ieee80211req_sta_stats stats;
 665
 666         memset(data, 0, sizeof(*data));
 667
 668         /*
 669          * Fetch statistics for station from the system.
 670          */
 671         memset(&stats, 0, sizeof(stats));
 672         memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
 673         if (set80211priv(drv, IEEE80211_IOCTL_STA_STATS,
 674                          &stats, sizeof(stats))) {
 675                 wpa_printf(MSG_DEBUG, "%s: Failed to fetch STA stats (addr "
 676                            MACSTR ")", __func__, MAC2STR(addr));
 677                 if (memcmp(addr, drv->acct_mac, ETH_ALEN) == 0) {
 678                         memcpy(data, &drv->acct_data, sizeof(*data));
 679                         return 0;
 680                 }
 681
 682                 printf("Failed to get station stats information element.\n");
 683                 return -1;
 684         }
 685
 686         data->rx_packets = stats.is_stats.ns_rx_data;
 687         data->rx_bytes = stats.is_stats.ns_rx_bytes;
 688         data->tx_packets = stats.is_stats.ns_tx_data;
 689         data->tx_bytes = stats.is_stats.ns_tx_bytes;
 690         return 0;
 691 }
 692
 693
 694 static int
 695 madwifi_sta_clear_stats(void *priv, const u8 *addr)
 696 {
 697         struct madwifi_driver_data *drv = priv;
 698         struct ieee80211req_mlme mlme;
 699         int ret;
 700
 701         wpa_printf(MSG_DEBUG, "%s: addr=%s", __func__, ether_sprintf(addr));
 702
 703         mlme.im_op = IEEE80211_MLME_CLEAR_STATS;
 704         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 705         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme,
 706                            sizeof(mlme));
 707         if (ret < 0) {
 708                 wpa_printf(MSG_DEBUG, "%s: Failed to clear STA stats (addr "
 709                            MACSTR ")", __func__, MAC2STR(addr));
 710         }
 711
 712         return ret;
 713 }
 714
 715
 716 static int
 717 madwifi_set_opt_ie(const char *ifname, void *priv, const u8 *ie, size_t ie_len)
 718 {
 719         /*
 720          * Do nothing; we setup parameters at startup that define the
 721          * contents of the beacon information element.
 722          */
 723         return 0;
 724 }
 725
 726 static int
 727 madwifi_sta_deauth(void *priv, const u8 *addr, int reason_code)
 728 {
 729         struct madwifi_driver_data *drv = priv;
 730         struct ieee80211req_mlme mlme;
 731         int ret;
 732
 733         wpa_printf(MSG_DEBUG, "%s: addr=%s reason_code=%d",
 734                    __func__, ether_sprintf(addr), reason_code);
 735
 736         mlme.im_op = IEEE80211_MLME_DEAUTH;
 737         mlme.im_reason = reason_code;
 738         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 739         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
 740         if (ret < 0) {
 741                 wpa_printf(MSG_DEBUG, "%s: Failed to deauth STA (addr " MACSTR
 742                            " reason %d)",
 743                            __func__, MAC2STR(addr), reason_code);
 744         }
 745
 746         return ret;
 747 }
 748
 749 static int
 750 madwifi_sta_disassoc(void *priv, const u8 *addr, int reason_code)
 751 {
 752         struct madwifi_driver_data *drv = priv;
 753         struct ieee80211req_mlme mlme;
 754         int ret;
 755
 756         wpa_printf(MSG_DEBUG, "%s: addr=%s reason_code=%d",
 757                    __func__, ether_sprintf(addr), reason_code);
 758
 759         mlme.im_op = IEEE80211_MLME_DISASSOC;
 760         mlme.im_reason = reason_code;
 761         memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
 762         ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
 763         if (ret < 0) {
 764                 wpa_printf(MSG_DEBUG, "%s: Failed to disassoc STA (addr "
 765                            MACSTR " reason %d)",
 766                            __func__, MAC2STR(addr), reason_code);
 767         }
 768
 769         return ret;
 770 }
 771
 772 #ifdef CONFIG_WPS
 773 static void madwifi_raw_receive(void *ctx, const u8 *src_addr, const u8 *buf,
 774                                 size_t len)
 775 {
 776         struct madwifi_driver_data *drv = ctx;
 777         const struct ieee80211_mgmt *mgmt;
 778         const u8 *end, *ie;
 779         u16 fc;
 780         size_t ie_len;
 781
 782         /* Send Probe Request information to WPS processing */
 783
 784         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 785                 return;
 786         mgmt = (const struct ieee80211_mgmt *) buf;
 787
 788         fc = le_to_host16(mgmt->frame_control);
 789         if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
 790             WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_PROBE_REQ)
 791                 return;
 792
 793         end = buf + len;
 794         ie = mgmt->u.probe_req.variable;
 795         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 796
 797         hostapd_wps_probe_req_rx(drv->hapd, mgmt->sa, ie, ie_len);
 798 }
 799 #endif /* CONFIG_WPS */
 800
 801 static int madwifi_receive_probe_req(struct madwifi_driver_data *drv)
 802 {
 803         int ret = 0;
 804 #ifdef CONFIG_WPS
 805         struct ieee80211req_set_filter filt;
 806
 807         wpa_printf(MSG_DEBUG, "%s Enter", __func__);
 808         filt.app_filterype = IEEE80211_FILTER_TYPE_PROBE_REQ;
 809
 810         ret = set80211priv(drv, IEEE80211_IOCTL_FILTERFRAME, &filt,
 811                            sizeof(struct ieee80211req_set_filter));
 812         if (ret)
 813                 return ret;
 814
 815         drv->sock_raw = l2_packet_init(drv->iface, NULL, ETH_P_80211_RAW,
 816                                        madwifi_raw_receive, drv, 1);
 817         if (drv->sock_raw == NULL)
 818                 return -1;
 819 #endif /* CONFIG_WPS */
 820         return ret;
 821 }
 822
 823 #ifdef CONFIG_WPS
 824 static int
 825 madwifi_set_wps_ie(void *priv, const u8 *ie, size_t len, u32 frametype)
 826 {
 827         struct madwifi_driver_data *drv = priv;
 828         u8 buf[256];
 829         struct ieee80211req_getset_appiebuf *beac_ie;
 830
 831         wpa_printf(MSG_DEBUG, "%s buflen = %lu", __func__,
 832                    (unsigned long) len);
 833
 834         beac_ie = (struct ieee80211req_getset_appiebuf *) buf;
 835         beac_ie->app_frmtype = frametype;
 836         beac_ie->app_buflen = len;
 837         memcpy(&(beac_ie->app_buf[0]), ie, len);
 838
 839         return set80211priv(drv, IEEE80211_IOCTL_SET_APPIEBUF, beac_ie,
 840                             sizeof(struct ieee80211req_getset_appiebuf) + len);
 841 }
 842
 843 static int
 844 madwifi_set_wps_beacon_ie(const char *ifname, void *priv, const u8 *ie,
 845                           size_t len)
 846 {
 847         return madwifi_set_wps_ie(priv, ie, len, IEEE80211_APPIE_FRAME_BEACON);
 848 }
 849
 850 static int
 851 madwifi_set_wps_probe_resp_ie(const char *ifname, void *priv, const u8 *ie,
 852                               size_t len)
 853 {
 854         return madwifi_set_wps_ie(priv, ie, len,
 855                                   IEEE80211_APPIE_FRAME_PROBE_RESP);
 856 }
 857 #else /* CONFIG_WPS */
 858 #define madwifi_set_wps_beacon_ie NULL
 859 #define madwifi_set_wps_probe_resp_ie NULL
 860 #endif /* CONFIG_WPS */
 861
 862 static int
 863 madwifi_new_sta(struct madwifi_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
 864 {
 865         struct hostapd_data *hapd = drv->hapd;
 866         struct ieee80211req_wpaie ie;
 867         int ielen = 0, res;
 868         u8 *iebuf = NULL;
 869
 870         /*
 871          * Fetch negotiated WPA/RSN parameters from the system.
 872          */
 873         memset(&ie, 0, sizeof(ie));
 874         memcpy(ie.wpa_macaddr, addr, IEEE80211_ADDR_LEN);
 875         if (set80211priv(drv, IEEE80211_IOCTL_GETWPAIE, &ie, sizeof(ie))) {
 876                 /*
 877                  * See ATH_WPS_IE comment in the beginning of the file for a
 878                  * possible cause for the failure..
 879                  */
 880                 wpa_printf(MSG_DEBUG, "%s: Failed to get WPA/RSN IE: %s",
 881                            __func__, strerror(errno));
 882                 goto no_ie;
 883         }
 884         wpa_hexdump(MSG_MSGDUMP, "madwifi req WPA IE",
 885                     ie.wpa_ie, IEEE80211_MAX_OPT_IE);
 886         wpa_hexdump(MSG_MSGDUMP, "madwifi req RSN IE",
 887                     ie.rsn_ie, IEEE80211_MAX_OPT_IE);
 888         iebuf = ie.wpa_ie;
 889         /* madwifi seems to return some random data if WPA/RSN IE is not set.
 890          * Assume the IE was not included if the IE type is unknown. */
 891         if (iebuf[0] != WLAN_EID_VENDOR_SPECIFIC)
 892                 iebuf[1] = 0;
 893         if (iebuf[1] == 0 && ie.rsn_ie[1] > 0) {
 894                 /* madwifi-ng svn #1453 added rsn_ie. Use it, if wpa_ie was not
 895                  * set. This is needed for WPA2. */
 896                 iebuf = ie.rsn_ie;
 897                 if (iebuf[0] != WLAN_EID_RSN)
 898                         iebuf[1] = 0;
 899         }
 900
 901         ielen = iebuf[1];
 902         if (ielen == 0)
 903                 iebuf = NULL;
 904         else
 905                 ielen += 2;
 906
 907 no_ie:
 908         res = hostapd_notif_assoc(hapd, addr, iebuf, ielen);
 909
 910         if (memcmp(addr, drv->acct_mac, ETH_ALEN) == 0) {
 911                 /* Cached accounting data is not valid anymore. */
 912                 memset(drv->acct_mac, 0, ETH_ALEN);
 913                 memset(&drv->acct_data, 0, sizeof(drv->acct_data));
 914         }
 915
 916         return res;
 917 }
 918
 919 static void
 920 madwifi_wireless_event_wireless_custom(struct madwifi_driver_data *drv,
 921                                        char *custom, char *end)
 922 {
 923         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
 924
 925         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 926                 char *pos;
 927                 u8 addr[ETH_ALEN];
 928                 pos = strstr(custom, "addr=");
 929                 if (pos == NULL) {
 930                         wpa_printf(MSG_DEBUG,
 931                                    "MLME-MICHAELMICFAILURE.indication "
 932                                    "without sender address ignored");
 933                         return;
 934                 }
 935                 pos += 5;
 936                 if (hwaddr_aton(pos, addr) == 0) {
 937                         hostapd_michael_mic_failure(drv->hapd, addr);
 938                 } else {
 939                         wpa_printf(MSG_DEBUG,
 940                                    "MLME-MICHAELMICFAILURE.indication "
 941                                    "with invalid MAC address");
 942                 }
 943         } else if (strncmp(custom, "STA-TRAFFIC-STAT", 16) == 0) {
 944                 char *key, *value;
 945                 u32 val;
 946                 key = custom;
 947                 while ((key = strchr(key, '\n')) != NULL) {
 948                         key++;
 949                         value = strchr(key, '=');
 950                         if (value == NULL)
 951                                 continue;
 952                         *value++ = '\0';
 953                         val = strtoul(value, NULL, 10);
 954                         if (strcmp(key, "mac") == 0)
 955                                 hwaddr_aton(value, drv->acct_mac);
 956                         else if (strcmp(key, "rx_packets") == 0)
 957                                 drv->acct_data.rx_packets = val;
 958                         else if (strcmp(key, "tx_packets") == 0)
 959                                 drv->acct_data.tx_packets = val;
 960                         else if (strcmp(key, "rx_bytes") == 0)
 961                                 drv->acct_data.rx_bytes = val;
 962                         else if (strcmp(key, "tx_bytes") == 0)
 963                                 drv->acct_data.tx_bytes = val;
 964                         key = value;
 965                 }
 966 #ifdef CONFIG_WPS
 967         } else if (strncmp(custom, "PUSH-BUTTON.indication", 22) == 0) {
 968                 /* Some atheros kernels send push button as a wireless event */
 969                 /* PROBLEM! this event is received for ALL BSSs ...
 970                  * so all are enabled for WPS... ugh.
 971                  */
 972                 hostapd_wps_button_pushed(drv->hapd);
 973         } else if (strncmp(custom, "Manage.prob_req ", 16) == 0) {
 974                 /*
 975                  * Atheros driver uses a hack to pass Probe Request frames as a
 976                  * binary data in the custom wireless event. The old way (using
 977                  * packet sniffing) didn't work when bridging.
 978                  * Format: "Manage.prob_req <frame len>" | zero padding | frame
 979                  */
 980 #define WPS_FRAM_TAG_SIZE 30 /* hardcoded in driver */
 981                 int len = atoi(custom + 16);
 982                 if (len < 0 || custom + WPS_FRAM_TAG_SIZE + len > end) {
 983                         wpa_printf(MSG_DEBUG, "Invalid Manage.prob_req event "
 984                                    "length %d", len);
 985                         return;
 986                 }
 987                 madwifi_raw_receive(drv, NULL,
 988                                     (u8 *) custom + WPS_FRAM_TAG_SIZE, len);
 989 #endif /* CONFIG_WPS */
 990         }
 991 }
 992
 993 static void
 994 madwifi_wireless_event_wireless(struct madwifi_driver_data *drv,
 995                                 char *data, int len)
 996 {
 997         struct iw_event iwe_buf, *iwe = &iwe_buf;
 998         char *pos, *end, *custom, *buf;
 999
1000         pos = data;
1001         end = data + len;
1002
1003         while (pos + IW_EV_LCP_LEN <= end) {
1004                 /* Event data may be unaligned, so make a local, aligned copy
1005                  * before processing. */
1006                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1007                 wpa_printf(MSG_MSGDUMP, "Wireless event: cmd=0x%x len=%d",
1008                            iwe->cmd, iwe->len);
1009                 if (iwe->len <= IW_EV_LCP_LEN)
1010                         return;
1011
1012                 custom = pos + IW_EV_POINT_LEN;
1013                 if (drv->we_version > 18 &&
1014                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
1015                      iwe->cmd == IWEVASSOCREQIE ||
1016                      iwe->cmd == IWEVCUSTOM)) {
1017                         /* WE-19 removed the pointer from struct iw_point */
1018                         char *dpos = (char *) &iwe_buf.u.data.length;
1019                         int dlen = dpos - (char *) &iwe_buf;
1020                         memcpy(dpos, pos + IW_EV_LCP_LEN,
1021                                sizeof(struct iw_event) - dlen);
1022                 } else {
1023                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1024                         custom += IW_EV_POINT_OFF;
1025                 }
1026
1027                 switch (iwe->cmd) {
1028                 case IWEVEXPIRED:
1029                         hostapd_notif_disassoc(drv->hapd,
1030                                                (u8 *) iwe->u.addr.sa_data);
1031                         break;
1032                 case IWEVREGISTERED:
1033                         madwifi_new_sta(drv, (u8 *) iwe->u.addr.sa_data);
1034                         break;
1035                 case IWEVASSOCREQIE:
1036                         /* Driver hack.. Use IWEVASSOCREQIE to bypass
1037                          * IWEVCUSTOM size limitations. Need to handle this
1038                          * just like IWEVCUSTOM.
1039                          */
1040                 case IWEVCUSTOM:
1041                         if (custom + iwe->u.data.length > end)
1042                                 return;
1043                         buf = malloc(iwe->u.data.length + 1);
1044                         if (buf == NULL)
1045                                 return;         /* XXX */
1046                         memcpy(buf, custom, iwe->u.data.length);
1047                         buf[iwe->u.data.length] = '\0';
1048                         madwifi_wireless_event_wireless_custom(
1049                                 drv, buf, buf + iwe->u.data.length);
1050                         free(buf);
1051                         break;
1052                 }
1053
1054                 pos += iwe->len;
1055         }
1056 }
1057
1058
1059 static void
1060 madwifi_wireless_event_rtm_newlink(struct madwifi_driver_data *drv,
1061                                                struct nlmsghdr *h, int len)
1062 {
1063         struct ifinfomsg *ifi;
1064         int attrlen, nlmsg_len, rta_len;
1065         struct rtattr * attr;
1066
1067         if (len < (int) sizeof(*ifi))
1068                 return;
1069
1070         ifi = NLMSG_DATA(h);
1071
1072         if (ifi->ifi_index != drv->ifindex)
1073                 return;
1074
1075         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
1076
1077         attrlen = h->nlmsg_len - nlmsg_len;
1078         if (attrlen < 0)
1079                 return;
1080
1081         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
1082
1083         rta_len = RTA_ALIGN(sizeof(struct rtattr));
1084         while (RTA_OK(attr, attrlen)) {
1085                 if (attr->rta_type == IFLA_WIRELESS) {
1086                         madwifi_wireless_event_wireless(
1087                                 drv, ((char *) attr) + rta_len,
1088                                 attr->rta_len - rta_len);
1089                 }
1090                 attr = RTA_NEXT(attr, attrlen);
1091         }
1092 }
1093
1094
1095 static void
1096 madwifi_wireless_event_receive(int sock, void *eloop_ctx, void *sock_ctx)
1097 {
1098         char buf[256];
1099         int left;
1100         struct sockaddr_nl from;
1101         socklen_t fromlen;
1102         struct nlmsghdr *h;
1103         struct madwifi_driver_data *drv = eloop_ctx;
1104
1105         fromlen = sizeof(from);
1106         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
1107                         (struct sockaddr *) &from, &fromlen);
1108         if (left < 0) {
1109                 if (errno != EINTR && errno != EAGAIN)
1110                         perror("recvfrom(netlink)");
1111                 return;
1112         }
1113
1114         h = (struct nlmsghdr *) buf;
1115         while (left >= (int) sizeof(*h)) {
1116                 int len, plen;
1117
1118                 len = h->nlmsg_len;
1119                 plen = len - sizeof(*h);
1120                 if (len > left || plen < 0) {
1121                         printf("Malformed netlink message: "
1122                                "len=%d left=%d plen=%d\n",
1123                                len, left, plen);
1124                         break;
1125                 }
1126
1127                 switch (h->nlmsg_type) {
1128                 case RTM_NEWLINK:
1129                         madwifi_wireless_event_rtm_newlink(drv, h, plen);
1130                         break;
1131                 }
1132
1133                 len = NLMSG_ALIGN(len);
1134                 left -= len;
1135                 h = (struct nlmsghdr *) ((char *) h + len);
1136         }
1137
1138         if (left > 0) {
1139                 printf("%d extra bytes in the end of netlink message\n", left);
1140         }
1141 }
1142
1143
1144 static int
1145 madwifi_get_we_version(struct madwifi_driver_data *drv)
1146 {
1147         struct iw_range *range;
1148         struct iwreq iwr;
1149         int minlen;
1150         size_t buflen;
1151
1152         drv->we_version = 0;
1153
1154         /*
1155          * Use larger buffer than struct iw_range in order to allow the
1156          * structure to grow in the future.
1157          */
1158         buflen = sizeof(struct iw_range) + 500;
1159         range = os_zalloc(buflen);
1160         if (range == NULL)
1161                 return -1;
1162
1163         memset(&iwr, 0, sizeof(iwr));
1164         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1165         iwr.u.data.pointer = (caddr_t) range;
1166         iwr.u.data.length = buflen;
1167
1168         minlen = ((char *) &range->enc_capa) - (char *) range +
1169                 sizeof(range->enc_capa);
1170
1171         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1172                 perror("ioctl[SIOCGIWRANGE]");
1173                 free(range);
1174                 return -1;
1175         } else if (iwr.u.data.length >= minlen &&
1176                    range->we_version_compiled >= 18) {
1177                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1178                            "WE(source)=%d enc_capa=0x%x",
1179                            range->we_version_compiled,
1180                            range->we_version_source,
1181                            range->enc_capa);
1182                 drv->we_version = range->we_version_compiled;
1183         }
1184
1185         free(range);
1186         return 0;
1187 }
1188
1189
1190 static int
1191 madwifi_wireless_event_init(void *priv)
1192 {
1193         struct madwifi_driver_data *drv = priv;
1194         int s;
1195         struct sockaddr_nl local;
1196
1197         madwifi_get_we_version(drv);
1198
1199         drv->wext_sock = -1;
1200
1201         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1202         if (s < 0) {
1203                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1204                 return -1;
1205         }
1206
1207         memset(&local, 0, sizeof(local));
1208         local.nl_family = AF_NETLINK;
1209         local.nl_groups = RTMGRP_LINK;
1210         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1211                 perror("bind(netlink)");
1212                 close(s);
1213                 return -1;
1214         }
1215
1216         eloop_register_read_sock(s, madwifi_wireless_event_receive, drv, NULL);
1217         drv->wext_sock = s;
1218
1219         return 0;
1220 }
1221
1222
1223 static void
1224 madwifi_wireless_event_deinit(void *priv)
1225 {
1226         struct madwifi_driver_data *drv = priv;
1227
1228         if (drv != NULL) {
1229                 if (drv->wext_sock < 0)
1230                         return;
1231                 eloop_unregister_read_sock(drv->wext_sock);
1232                 close(drv->wext_sock);
1233         }
1234 }
1235
1236
1237 static int
1238 madwifi_send_eapol(void *priv, const u8 *addr, const u8 *data, size_t data_len,
1239                    int encrypt, const u8 *own_addr)
1240 {
1241         struct madwifi_driver_data *drv = priv;
1242         unsigned char buf[3000];
1243         unsigned char *bp = buf;
1244         struct l2_ethhdr *eth;
1245         size_t len;
1246         int status;
1247
1248         /*
1249          * Prepend the Ethernet header.  If the caller left us
1250          * space at the front we could just insert it but since
1251          * we don't know we copy to a local buffer.  Given the frequency
1252          * and size of frames this probably doesn't matter.
1253          */
1254         len = data_len + sizeof(struct l2_ethhdr);
1255         if (len > sizeof(buf)) {
1256                 bp = malloc(len);
1257                 if (bp == NULL) {
1258                         printf("EAPOL frame discarded, cannot malloc temp "
1259                                "buffer of size %lu!\n", (unsigned long) len);
1260                         return -1;
1261                 }
1262         }
1263         eth = (struct l2_ethhdr *) bp;
1264         memcpy(eth->h_dest, addr, ETH_ALEN);
1265         memcpy(eth->h_source, own_addr, ETH_ALEN);
1266         eth->h_proto = host_to_be16(ETH_P_EAPOL);
1267         memcpy(eth+1, data, data_len);
1268
1269         wpa_hexdump(MSG_MSGDUMP, "TX EAPOL", bp, len);
1270
1271         status = l2_packet_send(drv->sock_xmit, addr, ETH_P_EAPOL, bp, len);
1272
1273         if (bp != buf)
1274                 free(bp);
1275         return status;
1276 }
1277
1278 static void
1279 handle_read(void *ctx, const u8 *src_addr, const u8 *buf, size_t len)
1280 {
1281         struct madwifi_driver_data *drv = ctx;
1282         hostapd_eapol_receive(drv->hapd, src_addr,
1283                               buf + sizeof(struct l2_ethhdr),
1284                               len - sizeof(struct l2_ethhdr));
1285 }
1286
1287 static void *
1288 madwifi_init(struct hostapd_data *hapd)
1289 {
1290         struct madwifi_driver_data *drv;
1291         struct ifreq ifr;
1292         struct iwreq iwr;
1293
1294         drv = os_zalloc(sizeof(struct madwifi_driver_data));
1295         if (drv == NULL) {
1296                 printf("Could not allocate memory for madwifi driver data\n");
1297                 return NULL;
1298         }
1299
1300         drv->hapd = hapd;
1301         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1302         if (drv->ioctl_sock < 0) {
1303                 perror("socket[PF_INET,SOCK_DGRAM]");
1304                 goto bad;
1305         }
1306         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
1307
1308         memset(&ifr, 0, sizeof(ifr));
1309         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1310         if (ioctl(drv->ioctl_sock, SIOCGIFINDEX, &ifr) != 0) {
1311                 perror("ioctl(SIOCGIFINDEX)");
1312                 goto bad;
1313         }
1314         drv->ifindex = ifr.ifr_ifindex;
1315
1316         drv->sock_xmit = l2_packet_init(drv->iface, NULL, ETH_P_EAPOL,
1317                                         handle_read, drv, 1);
1318         if (drv->sock_xmit == NULL)
1319                 goto bad;
1320         if (l2_packet_get_own_addr(drv->sock_xmit, hapd->own_addr))
1321                 goto bad;
1322         if (hapd->conf->bridge[0] != '\0') {
1323                 wpa_printf(MSG_DEBUG, "Configure bridge %s for EAPOL traffic.",
1324                            hapd->conf->bridge);
1325                 drv->sock_recv = l2_packet_init(hapd->conf->bridge, NULL,
1326                                                 ETH_P_EAPOL, handle_read, drv,
1327                                                 1);
1328                 if (drv->sock_recv == NULL)
1329                         goto bad;
1330         } else
1331                 drv->sock_recv = drv->sock_xmit;
1332
1333         memset(&iwr, 0, sizeof(iwr));
1334         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1335
1336         iwr.u.mode = IW_MODE_MASTER;
1337
1338         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0) {
1339                 perror("ioctl[SIOCSIWMODE]");
1340                 printf("Could not set interface to master mode!\n");
1341                 goto bad;
1342         }
1343
1344         madwifi_set_iface_flags(drv, 0);        /* mark down during setup */
1345         madwifi_set_privacy(drv->iface, drv, 0); /* default to no privacy */
1346
1347         madwifi_receive_probe_req(drv);
1348
1349         return drv;
1350 bad:
1351         if (drv->sock_xmit != NULL)
1352                 l2_packet_deinit(drv->sock_xmit);
1353         if (drv->ioctl_sock >= 0)
1354                 close(drv->ioctl_sock);
1355         if (drv != NULL)
1356                 free(drv);
1357         return NULL;
1358 }
1359
1360
1361 static void
1362 madwifi_deinit(void *priv)
1363 {
1364         struct madwifi_driver_data *drv = priv;
1365
1366         (void) madwifi_set_iface_flags(drv, 0);
1367         if (drv->ioctl_sock >= 0)
1368                 close(drv->ioctl_sock);
1369         if (drv->sock_recv != NULL && drv->sock_recv != drv->sock_xmit)
1370                 l2_packet_deinit(drv->sock_recv);
1371         if (drv->sock_xmit != NULL)
1372                 l2_packet_deinit(drv->sock_xmit);
1373         if (drv->sock_raw)
1374                 l2_packet_deinit(drv->sock_raw);
1375         free(drv);
1376 }
1377
1378 static int
1379 madwifi_set_ssid(const char *ifname, void *priv, const u8 *buf, int len)
1380 {
1381         struct madwifi_driver_data *drv = priv;
1382         struct iwreq iwr;
1383
1384         memset(&iwr, 0, sizeof(iwr));
1385         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1386         iwr.u.essid.flags = 1; /* SSID active */
1387         iwr.u.essid.pointer = (caddr_t) buf;
1388         iwr.u.essid.length = len + 1;
1389
1390         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
1391                 perror("ioctl[SIOCSIWESSID]");
1392                 printf("len=%d\n", len);
1393                 return -1;
1394         }
1395         return 0;
1396 }
1397
1398 static int
1399 madwifi_get_ssid(const char *ifname, void *priv, u8 *buf, int len)
1400 {
1401         struct madwifi_driver_data *drv = priv;
1402         struct iwreq iwr;
1403         int ret = 0;
1404
1405         memset(&iwr, 0, sizeof(iwr));
1406         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1407         iwr.u.essid.pointer = (caddr_t) buf;
1408         iwr.u.essid.length = len;
1409
1410         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
1411                 perror("ioctl[SIOCGIWESSID]");
1412                 ret = -1;
1413         } else
1414                 ret = iwr.u.essid.length;
1415
1416         return ret;
1417 }
1418
1419 static int
1420 madwifi_set_countermeasures(void *priv, int enabled)
1421 {
1422         struct madwifi_driver_data *drv = priv;
1423         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
1424         return set80211param(drv, IEEE80211_PARAM_COUNTERMEASURES, enabled);
1425 }
1426
1427 static int
1428 madwifi_commit(void *priv)
1429 {
1430         return madwifi_set_iface_flags(priv, 1);
1431 }
1432
1433 const struct wpa_driver_ops wpa_driver_atheros_ops = {
1434         .name                   = "atheros",
1435         .init                   = madwifi_init,
1436         .deinit                 = madwifi_deinit,
1437         .set_ieee8021x          = madwifi_set_ieee8021x,
1438         .set_privacy            = madwifi_set_privacy,
1439         .set_encryption         = madwifi_set_key,
1440         .get_seqnum             = madwifi_get_seqnum,
1441         .flush                  = madwifi_flush,
1442         .set_generic_elem       = madwifi_set_opt_ie,
1443         .wireless_event_init    = madwifi_wireless_event_init,
1444         .wireless_event_deinit  = madwifi_wireless_event_deinit,
1445         .sta_set_flags          = madwifi_sta_set_flags,
1446         .read_sta_data          = madwifi_read_sta_driver_data,
1447         .send_eapol             = madwifi_send_eapol,
1448         .sta_disassoc           = madwifi_sta_disassoc,
1449         .sta_deauth             = madwifi_sta_deauth,
1450         .set_ssid               = madwifi_set_ssid,
1451         .get_ssid               = madwifi_get_ssid,
1452         .set_countermeasures    = madwifi_set_countermeasures,
1453         .sta_clear_stats        = madwifi_sta_clear_stats,
1454         .commit                 = madwifi_commit,
1455         .set_wps_beacon_ie      = madwifi_set_wps_beacon_ie,
1456         .set_wps_probe_resp_ie  = madwifi_set_wps_probe_resp_ie,
1457 };