The Android Open Source Project | 845e012 | 2009-03-03 19:31:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * WPA Supplicant - driver interaction with BSD net80211 layer |
| 3 | * Copyright (c) 2004, Sam Leffler <sam@errno.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * Alternatively, this software may be distributed under the terms of BSD |
| 10 | * license. |
| 11 | * |
| 12 | * See README and COPYING for more details. |
| 13 | */ |
| 14 | |
| 15 | #include "includes.h" |
| 16 | #include <sys/ioctl.h> |
| 17 | |
| 18 | #include "common.h" |
| 19 | #include "driver.h" |
| 20 | #include "eloop.h" |
| 21 | #include "wpa_supplicant.h" |
| 22 | #include "l2_packet.h" |
| 23 | #include "wpa.h" /* XXX for RSN_INFO_ELEM */ |
| 24 | |
| 25 | #include <net/if.h> |
| 26 | #include <net/ethernet.h> |
| 27 | |
| 28 | #include <net80211/ieee80211.h> |
| 29 | #include <net80211/ieee80211_crypto.h> |
| 30 | #include <net80211/ieee80211_ioctl.h> |
| 31 | |
| 32 | struct wpa_driver_bsd_data { |
| 33 | int sock; /* open socket for 802.11 ioctls */ |
| 34 | int route; /* routing socket for events */ |
| 35 | char ifname[IFNAMSIZ+1]; /* interface name */ |
| 36 | unsigned int ifindex; /* interface index */ |
| 37 | void *ctx; |
| 38 | int prev_roaming; /* roaming state to restore on deinit */ |
| 39 | int prev_privacy; /* privacy state to restore on deinit */ |
| 40 | int prev_wpa; /* wpa state to restore on deinit */ |
| 41 | }; |
| 42 | |
| 43 | static int |
| 44 | set80211var(struct wpa_driver_bsd_data *drv, int op, const void *arg, int arg_len) |
| 45 | { |
| 46 | struct ieee80211req ireq; |
| 47 | |
| 48 | os_memset(&ireq, 0, sizeof(ireq)); |
| 49 | os_strncpy(ireq.i_name, drv->ifname, IFNAMSIZ); |
| 50 | ireq.i_type = op; |
| 51 | ireq.i_len = arg_len; |
| 52 | ireq.i_data = (void *) arg; |
| 53 | |
| 54 | if (ioctl(drv->sock, SIOCS80211, &ireq) < 0) { |
| 55 | fprintf(stderr, "ioctl[SIOCS80211, op %u, len %u]: %s\n", |
| 56 | op, arg_len, strerror(errno)); |
| 57 | return -1; |
| 58 | } |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static int |
| 63 | get80211var(struct wpa_driver_bsd_data *drv, int op, void *arg, int arg_len) |
| 64 | { |
| 65 | struct ieee80211req ireq; |
| 66 | |
| 67 | os_memset(&ireq, 0, sizeof(ireq)); |
| 68 | os_strncpy(ireq.i_name, drv->ifname, IFNAMSIZ); |
| 69 | ireq.i_type = op; |
| 70 | ireq.i_len = arg_len; |
| 71 | ireq.i_data = arg; |
| 72 | |
| 73 | if (ioctl(drv->sock, SIOCG80211, &ireq) < 0) { |
| 74 | fprintf(stderr, "ioctl[SIOCG80211, op %u, len %u]: %s\n", |
| 75 | op, arg_len, strerror(errno)); |
| 76 | return -1; |
| 77 | } |
| 78 | return ireq.i_len; |
| 79 | } |
| 80 | |
| 81 | static int |
| 82 | set80211param(struct wpa_driver_bsd_data *drv, int op, int arg) |
| 83 | { |
| 84 | struct ieee80211req ireq; |
| 85 | |
| 86 | os_memset(&ireq, 0, sizeof(ireq)); |
| 87 | os_strncpy(ireq.i_name, drv->ifname, IFNAMSIZ); |
| 88 | ireq.i_type = op; |
| 89 | ireq.i_val = arg; |
| 90 | |
| 91 | if (ioctl(drv->sock, SIOCS80211, &ireq) < 0) { |
| 92 | fprintf(stderr, "ioctl[SIOCS80211, op %u, arg 0x%x]: %s\n", |
| 93 | op, arg, strerror(errno)); |
| 94 | return -1; |
| 95 | } |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static int |
| 100 | get80211param(struct wpa_driver_bsd_data *drv, int op) |
| 101 | { |
| 102 | struct ieee80211req ireq; |
| 103 | |
| 104 | os_memset(&ireq, 0, sizeof(ireq)); |
| 105 | os_strncpy(ireq.i_name, drv->ifname, IFNAMSIZ); |
| 106 | ireq.i_type = op; |
| 107 | |
| 108 | if (ioctl(drv->sock, SIOCG80211, &ireq) < 0) { |
| 109 | fprintf(stderr, "ioctl[SIOCG80211, op %u]: %s\n", |
| 110 | op, strerror(errno)); |
| 111 | return -1; |
| 112 | } |
| 113 | return ireq.i_val; |
| 114 | } |
| 115 | |
| 116 | static int |
| 117 | getifflags(struct wpa_driver_bsd_data *drv, int *flags) |
| 118 | { |
| 119 | struct ifreq ifr; |
| 120 | |
| 121 | os_memset(&ifr, 0, sizeof(ifr)); |
| 122 | os_strncpy(ifr.ifr_name, drv->ifname, sizeof (ifr.ifr_name)); |
| 123 | if (ioctl(drv->sock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) { |
| 124 | perror("SIOCGIFFLAGS"); |
| 125 | return errno; |
| 126 | } |
| 127 | *flags = ifr.ifr_flags & 0xffff; |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static int |
| 132 | setifflags(struct wpa_driver_bsd_data *drv, int flags) |
| 133 | { |
| 134 | struct ifreq ifr; |
| 135 | |
| 136 | os_memset(&ifr, 0, sizeof(ifr)); |
| 137 | os_strncpy(ifr.ifr_name, drv->ifname, sizeof (ifr.ifr_name)); |
| 138 | ifr.ifr_flags = flags & 0xffff; |
| 139 | if (ioctl(drv->sock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) { |
| 140 | perror("SIOCSIFFLAGS"); |
| 141 | return errno; |
| 142 | } |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | static int |
| 147 | wpa_driver_bsd_get_bssid(void *priv, u8 *bssid) |
| 148 | { |
| 149 | struct wpa_driver_bsd_data *drv = priv; |
| 150 | |
| 151 | return get80211var(drv, IEEE80211_IOC_BSSID, |
| 152 | bssid, IEEE80211_ADDR_LEN) < 0 ? -1 : 0; |
| 153 | } |
| 154 | |
| 155 | #if 0 |
| 156 | static int |
| 157 | wpa_driver_bsd_set_bssid(void *priv, const char *bssid) |
| 158 | { |
| 159 | struct wpa_driver_bsd_data *drv = priv; |
| 160 | |
| 161 | return set80211var(drv, IEEE80211_IOC_BSSID, |
| 162 | bssid, IEEE80211_ADDR_LEN); |
| 163 | } |
| 164 | #endif |
| 165 | |
| 166 | static int |
| 167 | wpa_driver_bsd_get_ssid(void *priv, u8 *ssid) |
| 168 | { |
| 169 | struct wpa_driver_bsd_data *drv = priv; |
| 170 | |
| 171 | return get80211var(drv, IEEE80211_IOC_SSID, |
| 172 | ssid, IEEE80211_NWID_LEN); |
| 173 | } |
| 174 | |
| 175 | static int |
| 176 | wpa_driver_bsd_set_ssid(void *priv, const char *ssid, |
| 177 | size_t ssid_len) |
| 178 | { |
| 179 | struct wpa_driver_bsd_data *drv = priv; |
| 180 | |
| 181 | return set80211var(drv, IEEE80211_IOC_SSID, ssid, ssid_len); |
| 182 | } |
| 183 | |
| 184 | static int |
| 185 | wpa_driver_bsd_set_wpa_ie(struct wpa_driver_bsd_data *drv, |
| 186 | const char *wpa_ie, size_t wpa_ie_len) |
| 187 | { |
| 188 | return set80211var(drv, IEEE80211_IOC_OPTIE, wpa_ie, wpa_ie_len); |
| 189 | } |
| 190 | |
| 191 | static int |
| 192 | wpa_driver_bsd_set_wpa_internal(void *priv, int wpa, int privacy) |
| 193 | { |
| 194 | struct wpa_driver_bsd_data *drv = priv; |
| 195 | int ret = 0; |
| 196 | |
| 197 | wpa_printf(MSG_DEBUG, "%s: wpa=%d privacy=%d", |
| 198 | __FUNCTION__, wpa, privacy); |
| 199 | |
| 200 | if (!wpa && wpa_driver_bsd_set_wpa_ie(drv, NULL, 0) < 0) |
| 201 | ret = -1; |
| 202 | if (set80211param(drv, IEEE80211_IOC_PRIVACY, privacy) < 0) |
| 203 | ret = -1; |
| 204 | if (set80211param(drv, IEEE80211_IOC_WPA, wpa) < 0) |
| 205 | ret = -1; |
| 206 | |
| 207 | return ret; |
| 208 | } |
| 209 | |
| 210 | static int |
| 211 | wpa_driver_bsd_set_wpa(void *priv, int enabled) |
| 212 | { |
| 213 | wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled); |
| 214 | |
| 215 | return wpa_driver_bsd_set_wpa_internal(priv, enabled ? 3 : 0, enabled); |
| 216 | } |
| 217 | |
| 218 | static int |
| 219 | wpa_driver_bsd_del_key(struct wpa_driver_bsd_data *drv, int key_idx, |
| 220 | const unsigned char *addr) |
| 221 | { |
| 222 | struct ieee80211req_del_key wk; |
| 223 | |
| 224 | os_memset(&wk, 0, sizeof(wk)); |
| 225 | if (addr != NULL && |
| 226 | bcmp(addr, "\xff\xff\xff\xff\xff\xff", IEEE80211_ADDR_LEN) != 0) { |
| 227 | struct ether_addr ea; |
| 228 | |
| 229 | os_memcpy(&ea, addr, IEEE80211_ADDR_LEN); |
| 230 | wpa_printf(MSG_DEBUG, "%s: addr=%s keyidx=%d", |
| 231 | __func__, ether_ntoa(&ea), key_idx); |
| 232 | os_memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN); |
| 233 | wk.idk_keyix = (uint8_t) IEEE80211_KEYIX_NONE; |
| 234 | } else { |
| 235 | wpa_printf(MSG_DEBUG, "%s: keyidx=%d", __func__, key_idx); |
| 236 | wk.idk_keyix = key_idx; |
| 237 | } |
| 238 | return set80211var(drv, IEEE80211_IOC_DELKEY, &wk, sizeof(wk)); |
| 239 | } |
| 240 | |
| 241 | static int |
| 242 | wpa_driver_bsd_set_key(void *priv, wpa_alg alg, |
| 243 | const unsigned char *addr, int key_idx, int set_tx, |
| 244 | const u8 *seq, size_t seq_len, |
| 245 | const u8 *key, size_t key_len) |
| 246 | { |
| 247 | struct wpa_driver_bsd_data *drv = priv; |
| 248 | struct ieee80211req_key wk; |
| 249 | struct ether_addr ea; |
| 250 | char *alg_name; |
| 251 | u_int8_t cipher; |
| 252 | |
| 253 | if (alg == WPA_ALG_NONE) |
| 254 | return wpa_driver_bsd_del_key(drv, key_idx, addr); |
| 255 | |
| 256 | switch (alg) { |
| 257 | case WPA_ALG_WEP: |
| 258 | alg_name = "WEP"; |
| 259 | cipher = IEEE80211_CIPHER_WEP; |
| 260 | break; |
| 261 | case WPA_ALG_TKIP: |
| 262 | alg_name = "TKIP"; |
| 263 | cipher = IEEE80211_CIPHER_TKIP; |
| 264 | break; |
| 265 | case WPA_ALG_CCMP: |
| 266 | alg_name = "CCMP"; |
| 267 | cipher = IEEE80211_CIPHER_AES_CCM; |
| 268 | break; |
| 269 | default: |
| 270 | wpa_printf(MSG_DEBUG, "%s: unknown/unsupported algorithm %d", |
| 271 | __func__, alg); |
| 272 | return -1; |
| 273 | } |
| 274 | |
| 275 | os_memcpy(&ea, addr, IEEE80211_ADDR_LEN); |
| 276 | wpa_printf(MSG_DEBUG, |
| 277 | "%s: alg=%s addr=%s key_idx=%d set_tx=%d seq_len=%zu key_len=%zu", |
| 278 | __func__, alg_name, ether_ntoa(&ea), key_idx, set_tx, |
| 279 | seq_len, key_len); |
| 280 | |
| 281 | if (seq_len > sizeof(u_int64_t)) { |
| 282 | wpa_printf(MSG_DEBUG, "%s: seq_len %zu too big", |
| 283 | __func__, seq_len); |
| 284 | return -2; |
| 285 | } |
| 286 | if (key_len > sizeof(wk.ik_keydata)) { |
| 287 | wpa_printf(MSG_DEBUG, "%s: key length %zu too big", |
| 288 | __func__, key_len); |
| 289 | return -3; |
| 290 | } |
| 291 | |
| 292 | os_memset(&wk, 0, sizeof(wk)); |
| 293 | wk.ik_type = cipher; |
| 294 | wk.ik_flags = IEEE80211_KEY_RECV; |
| 295 | if (set_tx) |
| 296 | wk.ik_flags |= IEEE80211_KEY_XMIT; |
| 297 | os_memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN); |
| 298 | /* |
| 299 | * Deduce whether group/global or unicast key by checking |
| 300 | * the address (yech). Note also that we can only mark global |
| 301 | * keys default; doing this for a unicast key is an error. |
| 302 | */ |
| 303 | if (bcmp(addr, "\xff\xff\xff\xff\xff\xff", IEEE80211_ADDR_LEN) == 0) { |
| 304 | wk.ik_flags |= IEEE80211_KEY_GROUP; |
| 305 | wk.ik_keyix = key_idx; |
| 306 | } else { |
| 307 | wk.ik_keyix = (key_idx == 0 ? IEEE80211_KEYIX_NONE : key_idx); |
| 308 | } |
| 309 | if (wk.ik_keyix != IEEE80211_KEYIX_NONE && set_tx) |
| 310 | wk.ik_flags |= IEEE80211_KEY_DEFAULT; |
| 311 | wk.ik_keylen = key_len; |
| 312 | os_memcpy(&wk.ik_keyrsc, seq, seq_len); |
| 313 | os_memcpy(wk.ik_keydata, key, key_len); |
| 314 | |
| 315 | return set80211var(drv, IEEE80211_IOC_WPAKEY, &wk, sizeof(wk)); |
| 316 | } |
| 317 | |
| 318 | static int |
| 319 | wpa_driver_bsd_set_countermeasures(void *priv, int enabled) |
| 320 | { |
| 321 | struct wpa_driver_bsd_data *drv = priv; |
| 322 | |
| 323 | wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled); |
| 324 | return set80211param(drv, IEEE80211_IOC_COUNTERMEASURES, enabled); |
| 325 | } |
| 326 | |
| 327 | |
| 328 | static int |
| 329 | wpa_driver_bsd_set_drop_unencrypted(void *priv, int enabled) |
| 330 | { |
| 331 | struct wpa_driver_bsd_data *drv = priv; |
| 332 | |
| 333 | wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled); |
| 334 | return set80211param(drv, IEEE80211_IOC_DROPUNENCRYPTED, enabled); |
| 335 | } |
| 336 | |
| 337 | static int |
| 338 | wpa_driver_bsd_deauthenticate(void *priv, const u8 *addr, int reason_code) |
| 339 | { |
| 340 | struct wpa_driver_bsd_data *drv = priv; |
| 341 | struct ieee80211req_mlme mlme; |
| 342 | |
| 343 | wpa_printf(MSG_DEBUG, "%s", __func__); |
| 344 | os_memset(&mlme, 0, sizeof(mlme)); |
| 345 | mlme.im_op = IEEE80211_MLME_DEAUTH; |
| 346 | mlme.im_reason = reason_code; |
| 347 | os_memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN); |
| 348 | return set80211var(drv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme)); |
| 349 | } |
| 350 | |
| 351 | static int |
| 352 | wpa_driver_bsd_disassociate(void *priv, const u8 *addr, int reason_code) |
| 353 | { |
| 354 | struct wpa_driver_bsd_data *drv = priv; |
| 355 | struct ieee80211req_mlme mlme; |
| 356 | |
| 357 | wpa_printf(MSG_DEBUG, "%s", __func__); |
| 358 | os_memset(&mlme, 0, sizeof(mlme)); |
| 359 | mlme.im_op = IEEE80211_MLME_DISASSOC; |
| 360 | mlme.im_reason = reason_code; |
| 361 | os_memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN); |
| 362 | return set80211var(drv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme)); |
| 363 | } |
| 364 | |
| 365 | static int |
| 366 | wpa_driver_bsd_associate(void *priv, struct wpa_driver_associate_params *params) |
| 367 | { |
| 368 | struct wpa_driver_bsd_data *drv = priv; |
| 369 | struct ieee80211req_mlme mlme; |
| 370 | int privacy; |
| 371 | |
| 372 | wpa_printf(MSG_DEBUG, |
| 373 | "%s: ssid '%.*s' wpa ie len %u pairwise %u group %u key mgmt %u" |
| 374 | , __func__ |
| 375 | , params->ssid_len, params->ssid |
| 376 | , params->wpa_ie_len |
| 377 | , params->pairwise_suite |
| 378 | , params->group_suite |
| 379 | , params->key_mgmt_suite |
| 380 | ); |
| 381 | |
| 382 | /* XXX error handling is wrong but unclear what to do... */ |
| 383 | if (wpa_driver_bsd_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0) |
| 384 | return -1; |
| 385 | #ifndef NEW_FREEBSD_MLME_ASSOC |
| 386 | if (wpa_driver_bsd_set_ssid(drv, params->ssid, params->ssid_len) < 0) |
| 387 | return -1; |
| 388 | #endif |
| 389 | |
| 390 | privacy = !(params->pairwise_suite == CIPHER_NONE && |
| 391 | params->group_suite == CIPHER_NONE && |
| 392 | params->key_mgmt_suite == KEY_MGMT_NONE && |
| 393 | params->wpa_ie_len == 0); |
| 394 | wpa_printf(MSG_DEBUG, "%s: set PRIVACY %u", __func__, privacy); |
| 395 | |
| 396 | if (set80211param(drv, IEEE80211_IOC_PRIVACY, privacy) < 0) |
| 397 | return -1; |
| 398 | |
| 399 | if (params->wpa_ie_len && |
| 400 | set80211param(drv, IEEE80211_IOC_WPA, |
| 401 | params->wpa_ie[0] == RSN_INFO_ELEM ? 2 : 1) < 0) |
| 402 | return -1; |
| 403 | |
| 404 | os_memset(&mlme, 0, sizeof(mlme)); |
| 405 | mlme.im_op = IEEE80211_MLME_ASSOC; |
| 406 | #ifdef NEW_FREEBSD_MLME_ASSOC |
| 407 | if (params->ssid != NULL) |
| 408 | os_memcpy(mlme.im_ssid, params->ssid, params->ssid_len); |
| 409 | mlme.im_ssid_len = params->ssid_len; |
| 410 | #endif |
| 411 | if (params->bssid != NULL) |
| 412 | os_memcpy(mlme.im_macaddr, params->bssid, IEEE80211_ADDR_LEN); |
| 413 | if (set80211var(drv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme)) < 0) |
| 414 | return -1; |
| 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | static int |
| 419 | wpa_driver_bsd_set_auth_alg(void *priv, int auth_alg) |
| 420 | { |
| 421 | struct wpa_driver_bsd_data *drv = priv; |
| 422 | int authmode; |
| 423 | |
| 424 | if ((auth_alg & AUTH_ALG_OPEN_SYSTEM) && |
| 425 | (auth_alg & AUTH_ALG_SHARED_KEY)) |
| 426 | authmode = IEEE80211_AUTH_AUTO; |
| 427 | else if (auth_alg & AUTH_ALG_SHARED_KEY) |
| 428 | authmode = IEEE80211_AUTH_SHARED; |
| 429 | else |
| 430 | authmode = IEEE80211_AUTH_OPEN; |
| 431 | |
| 432 | return set80211param(drv, IEEE80211_IOC_AUTHMODE, authmode); |
| 433 | } |
| 434 | |
| 435 | static int |
| 436 | wpa_driver_bsd_scan(void *priv, const u8 *ssid, size_t ssid_len) |
| 437 | { |
| 438 | struct wpa_driver_bsd_data *drv = priv; |
| 439 | int flags; |
| 440 | |
| 441 | /* NB: interface must be marked UP to do a scan */ |
| 442 | if (getifflags(drv, &flags) != 0 || setifflags(drv, flags | IFF_UP) != 0) |
| 443 | return -1; |
| 444 | |
| 445 | /* set desired ssid before scan */ |
| 446 | if (wpa_driver_bsd_set_ssid(drv, ssid, ssid_len) < 0) |
| 447 | return -1; |
| 448 | |
| 449 | /* NB: net80211 delivers a scan complete event so no need to poll */ |
| 450 | return set80211param(drv, IEEE80211_IOC_SCAN_REQ, 0); |
| 451 | } |
| 452 | |
| 453 | #include <net/route.h> |
| 454 | #include <net80211/ieee80211_freebsd.h> |
| 455 | |
| 456 | static void |
| 457 | wpa_driver_bsd_event_receive(int sock, void *ctx, void *sock_ctx) |
| 458 | { |
| 459 | struct wpa_driver_bsd_data *drv = sock_ctx; |
| 460 | char buf[2048]; |
| 461 | struct if_announcemsghdr *ifan; |
| 462 | struct if_msghdr *ifm; |
| 463 | struct rt_msghdr *rtm; |
| 464 | union wpa_event_data event; |
| 465 | struct ieee80211_michael_event *mic; |
| 466 | int n; |
| 467 | |
| 468 | n = read(sock, buf, sizeof(buf)); |
| 469 | if (n < 0) { |
| 470 | if (errno != EINTR && errno != EAGAIN) |
| 471 | perror("read(PF_ROUTE)"); |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | rtm = (struct rt_msghdr *) buf; |
| 476 | if (rtm->rtm_version != RTM_VERSION) { |
| 477 | wpa_printf(MSG_DEBUG, "Routing message version %d not " |
| 478 | "understood\n", rtm->rtm_version); |
| 479 | return; |
| 480 | } |
| 481 | os_memset(&event, 0, sizeof(event)); |
| 482 | switch (rtm->rtm_type) { |
| 483 | case RTM_IFANNOUNCE: |
| 484 | ifan = (struct if_announcemsghdr *) rtm; |
| 485 | if (ifan->ifan_index != drv->ifindex) |
| 486 | break; |
| 487 | strlcpy(event.interface_status.ifname, drv->ifname, |
| 488 | sizeof(event.interface_status.ifname)); |
| 489 | switch (ifan->ifan_what) { |
| 490 | case IFAN_DEPARTURE: |
| 491 | event.interface_status.ievent = EVENT_INTERFACE_REMOVED; |
| 492 | default: |
| 493 | return; |
| 494 | } |
| 495 | wpa_printf(MSG_DEBUG, "RTM_IFANNOUNCE: Interface '%s' %s", |
| 496 | event.interface_status.ifname, |
| 497 | ifan->ifan_what == IFAN_DEPARTURE ? |
| 498 | "removed" : "added"); |
| 499 | wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event); |
| 500 | break; |
| 501 | case RTM_IEEE80211: |
| 502 | ifan = (struct if_announcemsghdr *) rtm; |
| 503 | if (ifan->ifan_index != drv->ifindex) |
| 504 | break; |
| 505 | switch (ifan->ifan_what) { |
| 506 | case RTM_IEEE80211_ASSOC: |
| 507 | case RTM_IEEE80211_REASSOC: |
| 508 | wpa_supplicant_event(ctx, EVENT_ASSOC, NULL); |
| 509 | break; |
| 510 | case RTM_IEEE80211_DISASSOC: |
| 511 | wpa_supplicant_event(ctx, EVENT_DISASSOC, NULL); |
| 512 | break; |
| 513 | case RTM_IEEE80211_SCAN: |
| 514 | wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL); |
| 515 | break; |
| 516 | case RTM_IEEE80211_REPLAY: |
| 517 | /* ignore */ |
| 518 | break; |
| 519 | case RTM_IEEE80211_MICHAEL: |
| 520 | mic = (struct ieee80211_michael_event *) &ifan[1]; |
| 521 | wpa_printf(MSG_DEBUG, |
| 522 | "Michael MIC failure wireless event: " |
| 523 | "keyix=%u src_addr=" MACSTR, mic->iev_keyix, |
| 524 | MAC2STR(mic->iev_src)); |
| 525 | |
| 526 | os_memset(&event, 0, sizeof(event)); |
| 527 | event.michael_mic_failure.unicast = |
| 528 | !IEEE80211_IS_MULTICAST(mic->iev_dst); |
| 529 | wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, |
| 530 | &event); |
| 531 | break; |
| 532 | } |
| 533 | break; |
| 534 | case RTM_IFINFO: |
| 535 | ifm = (struct if_msghdr *) rtm; |
| 536 | if (ifm->ifm_index != drv->ifindex) |
| 537 | break; |
| 538 | if ((rtm->rtm_flags & RTF_UP) == 0) { |
| 539 | strlcpy(event.interface_status.ifname, drv->ifname, |
| 540 | sizeof(event.interface_status.ifname)); |
| 541 | event.interface_status.ievent = EVENT_INTERFACE_REMOVED; |
| 542 | wpa_printf(MSG_DEBUG, "RTM_IFINFO: Interface '%s' DOWN", |
| 543 | event.interface_status.ifname); |
| 544 | wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event); |
| 545 | } |
| 546 | break; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | /* Compare function for sorting scan results. Return >0 if @b is consider |
| 551 | * better. */ |
| 552 | static int |
| 553 | wpa_scan_result_compar(const void *a, const void *b) |
| 554 | { |
| 555 | const struct wpa_scan_result *wa = a; |
| 556 | const struct wpa_scan_result *wb = b; |
| 557 | |
| 558 | /* WPA/WPA2 support preferred */ |
| 559 | if ((wb->wpa_ie_len || wb->rsn_ie_len) && |
| 560 | !(wa->wpa_ie_len || wa->rsn_ie_len)) |
| 561 | return 1; |
| 562 | if (!(wb->wpa_ie_len || wb->rsn_ie_len) && |
| 563 | (wa->wpa_ie_len || wa->rsn_ie_len)) |
| 564 | return -1; |
| 565 | |
| 566 | /* privacy support preferred */ |
| 567 | if ((wa->caps & IEEE80211_CAPINFO_PRIVACY) && |
| 568 | (wb->caps & IEEE80211_CAPINFO_PRIVACY) == 0) |
| 569 | return 1; |
| 570 | if ((wa->caps & IEEE80211_CAPINFO_PRIVACY) == 0 && |
| 571 | (wb->caps & IEEE80211_CAPINFO_PRIVACY)) |
| 572 | return -1; |
| 573 | |
| 574 | /* best/max rate preferred if signal level close enough XXX */ |
| 575 | if (wa->maxrate != wb->maxrate && abs(wb->level - wa->level) < 5) |
| 576 | return wb->maxrate - wa->maxrate; |
| 577 | |
| 578 | /* use freq for channel preference */ |
| 579 | |
| 580 | /* all things being equal, use signal level */ |
| 581 | return wb->level - wa->level; |
| 582 | } |
| 583 | |
| 584 | static int |
| 585 | getmaxrate(uint8_t rates[15], uint8_t nrates) |
| 586 | { |
| 587 | int i, maxrate = -1; |
| 588 | |
| 589 | for (i = 0; i < nrates; i++) { |
| 590 | int rate = rates[i] & IEEE80211_RATE_VAL; |
| 591 | if (rate > maxrate) |
| 592 | rate = maxrate; |
| 593 | } |
| 594 | return maxrate; |
| 595 | } |
| 596 | |
| 597 | /* unalligned little endian access */ |
| 598 | #define LE_READ_4(p) \ |
| 599 | ((u_int32_t) \ |
| 600 | ((((const u_int8_t *)(p))[0] ) | \ |
| 601 | (((const u_int8_t *)(p))[1] << 8) | \ |
| 602 | (((const u_int8_t *)(p))[2] << 16) | \ |
| 603 | (((const u_int8_t *)(p))[3] << 24))) |
| 604 | |
| 605 | static int __inline |
| 606 | iswpaoui(const u_int8_t *frm) |
| 607 | { |
| 608 | return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI); |
| 609 | } |
| 610 | |
| 611 | static int |
| 612 | wpa_driver_bsd_get_scan_results(void *priv, |
| 613 | struct wpa_scan_result *results, |
| 614 | size_t max_size) |
| 615 | { |
| 616 | #define min(a,b) ((a)>(b)?(b):(a)) |
| 617 | struct wpa_driver_bsd_data *drv = priv; |
| 618 | uint8_t buf[24*1024]; |
| 619 | uint8_t *cp, *vp; |
| 620 | struct ieee80211req_scan_result *sr; |
| 621 | struct wpa_scan_result *wsr; |
| 622 | int len, ielen; |
| 623 | |
| 624 | os_memset(results, 0, max_size * sizeof(struct wpa_scan_result)); |
| 625 | |
| 626 | len = get80211var(drv, IEEE80211_IOC_SCAN_RESULTS, buf, sizeof(buf)); |
| 627 | if (len < 0) |
| 628 | return -1; |
| 629 | cp = buf; |
| 630 | wsr = results; |
| 631 | while (len >= sizeof(struct ieee80211req_scan_result)) { |
| 632 | sr = (struct ieee80211req_scan_result *) cp; |
| 633 | os_memcpy(wsr->bssid, sr->isr_bssid, IEEE80211_ADDR_LEN); |
| 634 | wsr->ssid_len = sr->isr_ssid_len; |
| 635 | wsr->freq = sr->isr_freq; |
| 636 | wsr->noise = sr->isr_noise; |
| 637 | wsr->qual = sr->isr_rssi; |
| 638 | wsr->level = 0; /* XXX? */ |
| 639 | wsr->caps = sr->isr_capinfo; |
| 640 | wsr->maxrate = getmaxrate(sr->isr_rates, sr->isr_nrates); |
| 641 | vp = (u_int8_t *)(sr+1); |
| 642 | os_memcpy(wsr->ssid, vp, sr->isr_ssid_len); |
| 643 | if (sr->isr_ie_len > 0) { |
| 644 | vp += sr->isr_ssid_len; |
| 645 | ielen = sr->isr_ie_len; |
| 646 | while (ielen > 0) { |
| 647 | switch (vp[0]) { |
| 648 | case IEEE80211_ELEMID_VENDOR: |
| 649 | if (!iswpaoui(vp)) |
| 650 | break; |
| 651 | wsr->wpa_ie_len = |
| 652 | min(2+vp[1], SSID_MAX_WPA_IE_LEN); |
| 653 | os_memcpy(wsr->wpa_ie, vp, |
| 654 | wsr->wpa_ie_len); |
| 655 | break; |
| 656 | case IEEE80211_ELEMID_RSN: |
| 657 | wsr->rsn_ie_len = |
| 658 | min(2+vp[1], SSID_MAX_WPA_IE_LEN); |
| 659 | os_memcpy(wsr->rsn_ie, vp, |
| 660 | wsr->rsn_ie_len); |
| 661 | break; |
| 662 | } |
| 663 | ielen -= 2+vp[1]; |
| 664 | vp += 2+vp[1]; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | cp += sr->isr_len, len -= sr->isr_len; |
| 669 | wsr++; |
| 670 | } |
| 671 | qsort(results, wsr - results, sizeof(struct wpa_scan_result), |
| 672 | wpa_scan_result_compar); |
| 673 | |
| 674 | wpa_printf(MSG_DEBUG, "Received %d bytes of scan results (%d BSSes)", |
| 675 | len, wsr - results); |
| 676 | |
| 677 | return wsr - results; |
| 678 | #undef min |
| 679 | } |
| 680 | |
| 681 | static void * |
| 682 | wpa_driver_bsd_init(void *ctx, const char *ifname) |
| 683 | { |
| 684 | #define GETPARAM(drv, param, v) \ |
| 685 | (((v) = get80211param(drv, param)) != -1) |
| 686 | struct wpa_driver_bsd_data *drv; |
| 687 | |
| 688 | drv = os_zalloc(sizeof(*drv)); |
| 689 | if (drv == NULL) |
| 690 | return NULL; |
| 691 | /* |
| 692 | * NB: We require the interface name be mappable to an index. |
| 693 | * This implies we do not support having wpa_supplicant |
| 694 | * wait for an interface to appear. This seems ok; that |
| 695 | * doesn't belong here; it's really the job of devd. |
| 696 | */ |
| 697 | drv->ifindex = if_nametoindex(ifname); |
| 698 | if (drv->ifindex == 0) { |
| 699 | wpa_printf(MSG_DEBUG, "%s: interface %s does not exist", |
| 700 | __func__, ifname); |
| 701 | goto fail1; |
| 702 | } |
| 703 | drv->sock = socket(PF_INET, SOCK_DGRAM, 0); |
| 704 | if (drv->sock < 0) |
| 705 | goto fail1; |
| 706 | drv->route = socket(PF_ROUTE, SOCK_RAW, 0); |
| 707 | if (drv->route < 0) |
| 708 | goto fail; |
| 709 | eloop_register_read_sock(drv->route, |
| 710 | wpa_driver_bsd_event_receive, ctx, drv); |
| 711 | |
| 712 | drv->ctx = ctx; |
| 713 | os_strncpy(drv->ifname, ifname, sizeof(drv->ifname)); |
| 714 | |
| 715 | if (!GETPARAM(drv, IEEE80211_IOC_ROAMING, drv->prev_roaming)) { |
| 716 | wpa_printf(MSG_DEBUG, "%s: failed to get roaming state: %s", |
| 717 | __func__, strerror(errno)); |
| 718 | goto fail; |
| 719 | } |
| 720 | if (!GETPARAM(drv, IEEE80211_IOC_PRIVACY, drv->prev_privacy)) { |
| 721 | wpa_printf(MSG_DEBUG, "%s: failed to get privacy state: %s", |
| 722 | __func__, strerror(errno)); |
| 723 | goto fail; |
| 724 | } |
| 725 | if (!GETPARAM(drv, IEEE80211_IOC_WPA, drv->prev_wpa)) { |
| 726 | wpa_printf(MSG_DEBUG, "%s: failed to get wpa state: %s", |
| 727 | __func__, strerror(errno)); |
| 728 | goto fail; |
| 729 | } |
| 730 | if (set80211param(drv, IEEE80211_IOC_ROAMING, IEEE80211_ROAMING_MANUAL) < 0) { |
| 731 | wpa_printf(MSG_DEBUG, "%s: failed to set wpa_supplicant-based " |
| 732 | "roaming: %s", __func__, strerror(errno)); |
| 733 | goto fail; |
| 734 | } |
| 735 | |
| 736 | if (set80211param(drv, IEEE80211_IOC_WPA, 1+2) < 0) { |
| 737 | wpa_printf(MSG_DEBUG, "%s: failed to enable WPA support %s", |
| 738 | __func__, strerror(errno)); |
| 739 | goto fail; |
| 740 | } |
| 741 | |
| 742 | return drv; |
| 743 | fail: |
| 744 | close(drv->sock); |
| 745 | fail1: |
| 746 | os_free(drv); |
| 747 | return NULL; |
| 748 | #undef GETPARAM |
| 749 | } |
| 750 | |
| 751 | static void |
| 752 | wpa_driver_bsd_deinit(void *priv) |
| 753 | { |
| 754 | struct wpa_driver_bsd_data *drv = priv; |
| 755 | int flags; |
| 756 | |
| 757 | eloop_unregister_read_sock(drv->route); |
| 758 | |
| 759 | /* NB: mark interface down */ |
| 760 | if (getifflags(drv, &flags) == 0) |
| 761 | (void) setifflags(drv, flags &~ IFF_UP); |
| 762 | |
| 763 | wpa_driver_bsd_set_wpa_internal(drv, drv->prev_wpa, drv->prev_privacy); |
| 764 | if (set80211param(drv, IEEE80211_IOC_ROAMING, drv->prev_roaming) < 0) |
| 765 | wpa_printf(MSG_DEBUG, "%s: failed to restore roaming state", |
| 766 | __func__); |
| 767 | |
| 768 | (void) close(drv->route); /* ioctl socket */ |
| 769 | (void) close(drv->sock); /* event socket */ |
| 770 | os_free(drv); |
| 771 | } |
| 772 | |
| 773 | |
| 774 | const struct wpa_driver_ops wpa_driver_bsd_ops = { |
| 775 | .name = "bsd", |
| 776 | .desc = "BSD 802.11 support (Atheros, etc.)", |
| 777 | .init = wpa_driver_bsd_init, |
| 778 | .deinit = wpa_driver_bsd_deinit, |
| 779 | .get_bssid = wpa_driver_bsd_get_bssid, |
| 780 | .get_ssid = wpa_driver_bsd_get_ssid, |
| 781 | .set_wpa = wpa_driver_bsd_set_wpa, |
| 782 | .set_key = wpa_driver_bsd_set_key, |
| 783 | .set_countermeasures = wpa_driver_bsd_set_countermeasures, |
| 784 | .set_drop_unencrypted = wpa_driver_bsd_set_drop_unencrypted, |
| 785 | .scan = wpa_driver_bsd_scan, |
| 786 | .get_scan_results = wpa_driver_bsd_get_scan_results, |
| 787 | .deauthenticate = wpa_driver_bsd_deauthenticate, |
| 788 | .disassociate = wpa_driver_bsd_disassociate, |
| 789 | .associate = wpa_driver_bsd_associate, |
| 790 | .set_auth_alg = wpa_driver_bsd_set_auth_alg, |
| 791 | }; |