1 /* 2 * Driver interaction with Linux Host AP driver 3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 #include <sys/ioctl.h> 11 12 #include "linux_wext.h" 13 #include "common.h" 14 #include "driver.h" 15 #include "driver_wext.h" 16 #include "eloop.h" 17 #include "driver_hostap.h" 18 19 20 #include <net/if_arp.h> 21 #include <netpacket/packet.h> 22 23 #include "priv_netlink.h" 24 #include "netlink.h" 25 #include "linux_ioctl.h" 26 #include "common/ieee802_11_defs.h" 27 #include "common/ieee802_11_common.h" 28 29 30 /* MTU to be set for the wlan#ap device; this is mainly needed for IEEE 802.1X 31 * frames that might be longer than normal default MTU and they are not 32 * fragmented */ 33 #define HOSTAPD_MTU 2290 34 35 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 36 37 struct hostap_driver_data { 38 struct hostapd_data *hapd; 39 40 char iface[IFNAMSIZ + 1]; 41 int sock; /* raw packet socket for driver access */ 42 int ioctl_sock; /* socket for ioctl() use */ 43 struct netlink_data *netlink; 44 45 int we_version; 46 47 u8 *generic_ie; 48 size_t generic_ie_len; 49 u8 *wps_ie; 50 size_t wps_ie_len; 51 }; 52 53 54 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param, 55 int len); 56 static int hostap_set_iface_flags(void *priv, int dev_up); 57 58 static void handle_data(struct hostap_driver_data *drv, u8 *buf, size_t len, 59 u16 stype) 60 { 61 struct ieee80211_hdr *hdr; 62 u16 fc, ethertype; 63 u8 *pos, *sa; 64 size_t left; 65 union wpa_event_data event; 66 67 if (len < sizeof(struct ieee80211_hdr)) 68 return; 69 70 hdr = (struct ieee80211_hdr *) buf; 71 fc = le_to_host16(hdr->frame_control); 72 73 if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) { 74 printf("Not ToDS data frame (fc=0x%04x)\n", fc); 75 return; 76 } 77 78 sa = hdr->addr2; 79 os_memset(&event, 0, sizeof(event)); 80 event.rx_from_unknown.bssid = get_hdr_bssid(hdr, len); 81 event.rx_from_unknown.addr = sa; 82 wpa_supplicant_event(drv->hapd, EVENT_RX_FROM_UNKNOWN, &event); 83 84 pos = (u8 *) (hdr + 1); 85 left = len - sizeof(*hdr); 86 87 if (left < sizeof(rfc1042_header)) { 88 printf("Too short data frame\n"); 89 return; 90 } 91 92 if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) { 93 printf("Data frame with no RFC1042 header\n"); 94 return; 95 } 96 pos += sizeof(rfc1042_header); 97 left -= sizeof(rfc1042_header); 98 99 if (left < 2) { 100 printf("No ethertype in data frame\n"); 101 return; 102 } 103 104 ethertype = WPA_GET_BE16(pos); 105 pos += 2; 106 left -= 2; 107 switch (ethertype) { 108 case ETH_P_PAE: 109 drv_event_eapol_rx(drv->hapd, sa, pos, left); 110 break; 111 112 default: 113 printf("Unknown ethertype 0x%04x in data frame\n", ethertype); 114 break; 115 } 116 } 117 118 119 static void handle_tx_callback(struct hostap_driver_data *drv, u8 *buf, 120 size_t len, int ok) 121 { 122 struct ieee80211_hdr *hdr; 123 u16 fc; 124 union wpa_event_data event; 125 126 hdr = (struct ieee80211_hdr *) buf; 127 fc = le_to_host16(hdr->frame_control); 128 129 os_memset(&event, 0, sizeof(event)); 130 event.tx_status.type = WLAN_FC_GET_TYPE(fc); 131 event.tx_status.stype = WLAN_FC_GET_STYPE(fc); 132 event.tx_status.dst = hdr->addr1; 133 event.tx_status.data = buf; 134 event.tx_status.data_len = len; 135 event.tx_status.ack = ok; 136 wpa_supplicant_event(drv->hapd, EVENT_TX_STATUS, &event); 137 } 138 139 140 static void handle_frame(struct hostap_driver_data *drv, u8 *buf, size_t len) 141 { 142 struct ieee80211_hdr *hdr; 143 u16 fc, extra_len, type, stype; 144 size_t data_len = len; 145 int ver; 146 union wpa_event_data event; 147 148 /* PSPOLL is only 16 bytes, but driver does not (at least yet) pass 149 * these to user space */ 150 if (len < 24) { 151 wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)", 152 (unsigned long) len); 153 return; 154 } 155 156 hdr = (struct ieee80211_hdr *) buf; 157 fc = le_to_host16(hdr->frame_control); 158 type = WLAN_FC_GET_TYPE(fc); 159 stype = WLAN_FC_GET_STYPE(fc); 160 161 if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) { 162 wpa_hexdump(MSG_MSGDUMP, "Received management frame", 163 buf, len); 164 } 165 166 ver = fc & WLAN_FC_PVER; 167 168 /* protocol version 3 is reserved for indicating extra data after the 169 * payload, version 2 for indicating ACKed frame (TX callbacks), and 170 * version 1 for indicating failed frame (no ACK, TX callbacks) */ 171 if (ver == 3) { 172 u8 *pos = buf + len - 2; 173 extra_len = WPA_GET_LE16(pos); 174 printf("extra data in frame (elen=%d)\n", extra_len); 175 if ((size_t) extra_len + 2 > len) { 176 printf(" extra data overflow\n"); 177 return; 178 } 179 len -= extra_len + 2; 180 } else if (ver == 1 || ver == 2) { 181 handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0); 182 return; 183 } else if (ver != 0) { 184 printf("unknown protocol version %d\n", ver); 185 return; 186 } 187 188 switch (type) { 189 case WLAN_FC_TYPE_MGMT: 190 os_memset(&event, 0, sizeof(event)); 191 event.rx_mgmt.frame = buf; 192 event.rx_mgmt.frame_len = data_len; 193 wpa_supplicant_event(drv->hapd, EVENT_RX_MGMT, &event); 194 break; 195 case WLAN_FC_TYPE_CTRL: 196 wpa_printf(MSG_DEBUG, "CTRL"); 197 break; 198 case WLAN_FC_TYPE_DATA: 199 wpa_printf(MSG_DEBUG, "DATA"); 200 handle_data(drv, buf, data_len, stype); 201 break; 202 default: 203 wpa_printf(MSG_DEBUG, "unknown frame type %d", type); 204 break; 205 } 206 } 207 208 209 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx) 210 { 211 struct hostap_driver_data *drv = eloop_ctx; 212 int len; 213 unsigned char buf[3000]; 214 215 len = recv(sock, buf, sizeof(buf), 0); 216 if (len < 0) { 217 wpa_printf(MSG_ERROR, "recv: %s", strerror(errno)); 218 return; 219 } 220 221 handle_frame(drv, buf, len); 222 } 223 224 225 static int hostap_init_sockets(struct hostap_driver_data *drv, u8 *own_addr) 226 { 227 struct ifreq ifr; 228 struct sockaddr_ll addr; 229 230 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); 231 if (drv->sock < 0) { 232 wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s", 233 strerror(errno)); 234 return -1; 235 } 236 237 if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) { 238 wpa_printf(MSG_ERROR, "Could not register read socket"); 239 return -1; 240 } 241 242 memset(&ifr, 0, sizeof(ifr)); 243 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", drv->iface); 244 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) { 245 wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s", 246 strerror(errno)); 247 return -1; 248 } 249 250 if (hostap_set_iface_flags(drv, 1)) { 251 return -1; 252 } 253 254 memset(&addr, 0, sizeof(addr)); 255 addr.sll_family = AF_PACKET; 256 addr.sll_ifindex = ifr.ifr_ifindex; 257 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d", 258 addr.sll_ifindex); 259 260 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 261 wpa_printf(MSG_ERROR, "bind: %s", strerror(errno)); 262 return -1; 263 } 264 265 return linux_get_ifhwaddr(drv->sock, drv->iface, own_addr); 266 } 267 268 269 static int hostap_send_mlme(void *priv, const u8 *msg, size_t len, int noack) 270 { 271 struct hostap_driver_data *drv = priv; 272 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg; 273 int res; 274 275 /* Request TX callback */ 276 hdr->frame_control |= host_to_le16(BIT(1)); 277 res = send(drv->sock, msg, len, 0); 278 hdr->frame_control &= ~host_to_le16(BIT(1)); 279 280 return res; 281 } 282 283 284 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data, 285 size_t data_len, int encrypt, const u8 *own_addr, 286 u32 flags) 287 { 288 struct hostap_driver_data *drv = priv; 289 struct ieee80211_hdr *hdr; 290 size_t len; 291 u8 *pos; 292 int res; 293 294 len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len; 295 hdr = os_zalloc(len); 296 if (hdr == NULL) { 297 printf("malloc() failed for hostapd_send_data(len=%lu)\n", 298 (unsigned long) len); 299 return -1; 300 } 301 302 hdr->frame_control = 303 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA); 304 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS); 305 if (encrypt) 306 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP); 307 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN); 308 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 309 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 310 311 pos = (u8 *) (hdr + 1); 312 memcpy(pos, rfc1042_header, sizeof(rfc1042_header)); 313 pos += sizeof(rfc1042_header); 314 *((u16 *) pos) = htons(ETH_P_PAE); 315 pos += 2; 316 memcpy(pos, data, data_len); 317 318 res = hostap_send_mlme(drv, (u8 *) hdr, len, 0); 319 if (res < 0) { 320 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - " 321 "failed: %d (%s)", 322 (unsigned long) len, errno, strerror(errno)); 323 } 324 free(hdr); 325 326 return res; 327 } 328 329 330 static int hostap_sta_set_flags(void *priv, const u8 *addr, 331 int total_flags, int flags_or, int flags_and) 332 { 333 struct hostap_driver_data *drv = priv; 334 struct prism2_hostapd_param param; 335 336 if (flags_or & WPA_STA_AUTHORIZED) 337 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */ 338 if (!(flags_and & WPA_STA_AUTHORIZED)) 339 flags_and = ~BIT(5); 340 else 341 flags_and = ~0; 342 memset(¶m, 0, sizeof(param)); 343 param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA; 344 memcpy(param.sta_addr, addr, ETH_ALEN); 345 param.u.set_flags_sta.flags_or = flags_or; 346 param.u.set_flags_sta.flags_and = flags_and; 347 return hostapd_ioctl(drv, ¶m, sizeof(param)); 348 } 349 350 351 static int hostap_set_iface_flags(void *priv, int dev_up) 352 { 353 struct hostap_driver_data *drv = priv; 354 struct ifreq ifr; 355 char ifname[IFNAMSIZ]; 356 357 os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface); 358 if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0) 359 return -1; 360 361 if (dev_up) { 362 memset(&ifr, 0, sizeof(ifr)); 363 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); 364 ifr.ifr_mtu = HOSTAPD_MTU; 365 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) { 366 wpa_printf(MSG_INFO, 367 "Setting MTU failed - trying to survive with current value: ioctl[SIOCSIFMTU]: %s", 368 strerror(errno)); 369 } 370 } 371 372 return 0; 373 } 374 375 376 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param, 377 int len) 378 { 379 struct hostap_driver_data *drv = priv; 380 struct iwreq iwr; 381 382 memset(&iwr, 0, sizeof(iwr)); 383 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 384 iwr.u.data.pointer = (caddr_t) param; 385 iwr.u.data.length = len; 386 387 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) { 388 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_HOSTAPD]: %s", 389 strerror(errno)); 390 return -1; 391 } 392 393 return 0; 394 } 395 396 397 static int wpa_driver_hostap_set_key(const char *ifname, void *priv, 398 enum wpa_alg alg, const u8 *addr, 399 int key_idx, int set_tx, 400 const u8 *seq, size_t seq_len, 401 const u8 *key, size_t key_len) 402 { 403 struct hostap_driver_data *drv = priv; 404 struct prism2_hostapd_param *param; 405 u8 *buf; 406 size_t blen; 407 int ret = 0; 408 409 blen = sizeof(*param) + key_len; 410 buf = os_zalloc(blen); 411 if (buf == NULL) 412 return -1; 413 414 param = (struct prism2_hostapd_param *) buf; 415 param->cmd = PRISM2_SET_ENCRYPTION; 416 if (addr == NULL) 417 memset(param->sta_addr, 0xff, ETH_ALEN); 418 else 419 memcpy(param->sta_addr, addr, ETH_ALEN); 420 switch (alg) { 421 case WPA_ALG_NONE: 422 os_strlcpy((char *) param->u.crypt.alg, "NONE", 423 HOSTAP_CRYPT_ALG_NAME_LEN); 424 break; 425 case WPA_ALG_WEP: 426 os_strlcpy((char *) param->u.crypt.alg, "WEP", 427 HOSTAP_CRYPT_ALG_NAME_LEN); 428 break; 429 case WPA_ALG_TKIP: 430 os_strlcpy((char *) param->u.crypt.alg, "TKIP", 431 HOSTAP_CRYPT_ALG_NAME_LEN); 432 break; 433 case WPA_ALG_CCMP: 434 os_strlcpy((char *) param->u.crypt.alg, "CCMP", 435 HOSTAP_CRYPT_ALG_NAME_LEN); 436 break; 437 default: 438 os_free(buf); 439 return -1; 440 } 441 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0; 442 param->u.crypt.idx = key_idx; 443 param->u.crypt.key_len = key_len; 444 memcpy((u8 *) (param + 1), key, key_len); 445 446 if (hostapd_ioctl(drv, param, blen)) { 447 printf("Failed to set encryption.\n"); 448 ret = -1; 449 } 450 free(buf); 451 452 return ret; 453 } 454 455 456 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr, 457 int idx, u8 *seq) 458 { 459 struct hostap_driver_data *drv = priv; 460 struct prism2_hostapd_param *param; 461 u8 *buf; 462 size_t blen; 463 int ret = 0; 464 465 blen = sizeof(*param) + 32; 466 buf = os_zalloc(blen); 467 if (buf == NULL) 468 return -1; 469 470 param = (struct prism2_hostapd_param *) buf; 471 param->cmd = PRISM2_GET_ENCRYPTION; 472 if (addr == NULL) 473 memset(param->sta_addr, 0xff, ETH_ALEN); 474 else 475 memcpy(param->sta_addr, addr, ETH_ALEN); 476 param->u.crypt.idx = idx; 477 478 if (hostapd_ioctl(drv, param, blen)) { 479 printf("Failed to get encryption.\n"); 480 ret = -1; 481 } else { 482 memcpy(seq, param->u.crypt.seq, 8); 483 } 484 free(buf); 485 486 return ret; 487 } 488 489 490 static int hostap_ioctl_prism2param(void *priv, int param, int value) 491 { 492 struct hostap_driver_data *drv = priv; 493 struct iwreq iwr; 494 int *i; 495 496 memset(&iwr, 0, sizeof(iwr)); 497 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 498 i = (int *) iwr.u.name; 499 *i++ = param; 500 *i++ = value; 501 502 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) { 503 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_PRISM2_PARAM]: %s", 504 strerror(errno)); 505 return -1; 506 } 507 508 return 0; 509 } 510 511 512 static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params) 513 { 514 struct hostap_driver_data *drv = priv; 515 int enabled = params->enabled; 516 517 /* enable kernel driver support for IEEE 802.1X */ 518 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) { 519 printf("Could not setup IEEE 802.1X support in kernel driver." 520 "\n"); 521 return -1; 522 } 523 524 if (!enabled) 525 return 0; 526 527 /* use host driver implementation of encryption to allow 528 * individual keys and passing plaintext EAPOL frames */ 529 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) || 530 hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) { 531 printf("Could not setup host-based encryption in kernel " 532 "driver.\n"); 533 return -1; 534 } 535 536 return 0; 537 } 538 539 540 static int hostap_set_privacy(void *priv, int enabled) 541 { 542 struct hostap_drvier_data *drv = priv; 543 544 return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED, 545 enabled); 546 } 547 548 549 static int hostap_set_ssid(void *priv, const u8 *buf, int len) 550 { 551 struct hostap_driver_data *drv = priv; 552 struct iwreq iwr; 553 554 memset(&iwr, 0, sizeof(iwr)); 555 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 556 iwr.u.essid.flags = 1; /* SSID active */ 557 iwr.u.essid.pointer = (caddr_t) buf; 558 iwr.u.essid.length = len + 1; 559 560 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) { 561 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID,len=%d]: %s", 562 len, strerror(errno)); 563 return -1; 564 } 565 566 return 0; 567 } 568 569 570 static int hostap_flush(void *priv) 571 { 572 struct hostap_driver_data *drv = priv; 573 struct prism2_hostapd_param param; 574 575 memset(¶m, 0, sizeof(param)); 576 param.cmd = PRISM2_HOSTAPD_FLUSH; 577 return hostapd_ioctl(drv, ¶m, sizeof(param)); 578 } 579 580 581 static int hostap_read_sta_data(void *priv, 582 struct hostap_sta_driver_data *data, 583 const u8 *addr) 584 { 585 struct hostap_driver_data *drv = priv; 586 char buf[1024], line[128], *pos; 587 FILE *f; 588 unsigned long val; 589 590 memset(data, 0, sizeof(*data)); 591 snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR, 592 drv->iface, MAC2STR(addr)); 593 594 f = fopen(buf, "r"); 595 if (!f) 596 return -1; 597 /* Need to read proc file with in one piece, so use large enough 598 * buffer. */ 599 setbuffer(f, buf, sizeof(buf)); 600 601 while (fgets(line, sizeof(line), f)) { 602 pos = strchr(line, '='); 603 if (!pos) 604 continue; 605 *pos++ = '\0'; 606 val = strtoul(pos, NULL, 10); 607 if (strcmp(line, "rx_packets") == 0) 608 data->rx_packets = val; 609 else if (strcmp(line, "tx_packets") == 0) 610 data->tx_packets = val; 611 else if (strcmp(line, "rx_bytes") == 0) 612 data->rx_bytes = val; 613 else if (strcmp(line, "tx_bytes") == 0) 614 data->tx_bytes = val; 615 } 616 617 fclose(f); 618 619 return 0; 620 } 621 622 623 static int hostap_sta_add(void *priv, struct hostapd_sta_add_params *params) 624 { 625 struct hostap_driver_data *drv = priv; 626 struct prism2_hostapd_param param; 627 int tx_supp_rates = 0; 628 size_t i; 629 630 #define WLAN_RATE_1M BIT(0) 631 #define WLAN_RATE_2M BIT(1) 632 #define WLAN_RATE_5M5 BIT(2) 633 #define WLAN_RATE_11M BIT(3) 634 635 for (i = 0; i < params->supp_rates_len; i++) { 636 if ((params->supp_rates[i] & 0x7f) == 2) 637 tx_supp_rates |= WLAN_RATE_1M; 638 if ((params->supp_rates[i] & 0x7f) == 4) 639 tx_supp_rates |= WLAN_RATE_2M; 640 if ((params->supp_rates[i] & 0x7f) == 11) 641 tx_supp_rates |= WLAN_RATE_5M5; 642 if ((params->supp_rates[i] & 0x7f) == 22) 643 tx_supp_rates |= WLAN_RATE_11M; 644 } 645 646 memset(¶m, 0, sizeof(param)); 647 param.cmd = PRISM2_HOSTAPD_ADD_STA; 648 memcpy(param.sta_addr, params->addr, ETH_ALEN); 649 param.u.add_sta.aid = params->aid; 650 param.u.add_sta.capability = params->capability; 651 param.u.add_sta.tx_supp_rates = tx_supp_rates; 652 return hostapd_ioctl(drv, ¶m, sizeof(param)); 653 } 654 655 656 static int hostap_sta_remove(void *priv, const u8 *addr) 657 { 658 struct hostap_driver_data *drv = priv; 659 struct prism2_hostapd_param param; 660 661 hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED); 662 663 memset(¶m, 0, sizeof(param)); 664 param.cmd = PRISM2_HOSTAPD_REMOVE_STA; 665 memcpy(param.sta_addr, addr, ETH_ALEN); 666 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 667 printf("Could not remove station from kernel driver.\n"); 668 return -1; 669 } 670 return 0; 671 } 672 673 674 static int hostap_get_inact_sec(void *priv, const u8 *addr) 675 { 676 struct hostap_driver_data *drv = priv; 677 struct prism2_hostapd_param param; 678 679 memset(¶m, 0, sizeof(param)); 680 param.cmd = PRISM2_HOSTAPD_GET_INFO_STA; 681 memcpy(param.sta_addr, addr, ETH_ALEN); 682 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 683 return -1; 684 } 685 686 return param.u.get_info_sta.inactive_sec; 687 } 688 689 690 static int hostap_sta_clear_stats(void *priv, const u8 *addr) 691 { 692 struct hostap_driver_data *drv = priv; 693 struct prism2_hostapd_param param; 694 695 memset(¶m, 0, sizeof(param)); 696 param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS; 697 memcpy(param.sta_addr, addr, ETH_ALEN); 698 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 699 return -1; 700 } 701 702 return 0; 703 } 704 705 706 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv) 707 { 708 struct prism2_hostapd_param *param; 709 int res; 710 size_t blen, elem_len; 711 712 elem_len = drv->generic_ie_len + drv->wps_ie_len; 713 blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len; 714 if (blen < sizeof(*param)) 715 blen = sizeof(*param); 716 717 param = os_zalloc(blen); 718 if (param == NULL) 719 return -1; 720 721 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT; 722 param->u.generic_elem.len = elem_len; 723 if (drv->generic_ie) { 724 os_memcpy(param->u.generic_elem.data, drv->generic_ie, 725 drv->generic_ie_len); 726 } 727 if (drv->wps_ie) { 728 os_memcpy(¶m->u.generic_elem.data[drv->generic_ie_len], 729 drv->wps_ie, drv->wps_ie_len); 730 } 731 wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE", 732 param->u.generic_elem.data, elem_len); 733 res = hostapd_ioctl(drv, param, blen); 734 735 os_free(param); 736 737 return res; 738 } 739 740 741 static int hostap_set_generic_elem(void *priv, 742 const u8 *elem, size_t elem_len) 743 { 744 struct hostap_driver_data *drv = priv; 745 746 os_free(drv->generic_ie); 747 drv->generic_ie = NULL; 748 drv->generic_ie_len = 0; 749 if (elem) { 750 drv->generic_ie = os_malloc(elem_len); 751 if (drv->generic_ie == NULL) 752 return -1; 753 os_memcpy(drv->generic_ie, elem, elem_len); 754 drv->generic_ie_len = elem_len; 755 } 756 757 return hostapd_ioctl_set_generic_elem(drv); 758 } 759 760 761 static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon, 762 const struct wpabuf *proberesp, 763 const struct wpabuf *assocresp) 764 { 765 struct hostap_driver_data *drv = priv; 766 767 /* 768 * Host AP driver supports only one set of extra IEs, so we need to 769 * use the Probe Response IEs also for Beacon frames since they include 770 * more information. 771 */ 772 773 os_free(drv->wps_ie); 774 drv->wps_ie = NULL; 775 drv->wps_ie_len = 0; 776 if (proberesp) { 777 drv->wps_ie = os_malloc(wpabuf_len(proberesp)); 778 if (drv->wps_ie == NULL) 779 return -1; 780 os_memcpy(drv->wps_ie, wpabuf_head(proberesp), 781 wpabuf_len(proberesp)); 782 drv->wps_ie_len = wpabuf_len(proberesp); 783 } 784 785 return hostapd_ioctl_set_generic_elem(drv); 786 } 787 788 789 static void 790 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv, 791 char *custom) 792 { 793 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom); 794 795 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) { 796 char *pos; 797 u8 addr[ETH_ALEN]; 798 pos = strstr(custom, "addr="); 799 if (pos == NULL) { 800 wpa_printf(MSG_DEBUG, 801 "MLME-MICHAELMICFAILURE.indication " 802 "without sender address ignored"); 803 return; 804 } 805 pos += 5; 806 if (hwaddr_aton(pos, addr) == 0) { 807 union wpa_event_data data; 808 os_memset(&data, 0, sizeof(data)); 809 data.michael_mic_failure.unicast = 1; 810 data.michael_mic_failure.src = addr; 811 wpa_supplicant_event(drv->hapd, 812 EVENT_MICHAEL_MIC_FAILURE, &data); 813 } else { 814 wpa_printf(MSG_DEBUG, 815 "MLME-MICHAELMICFAILURE.indication " 816 "with invalid MAC address"); 817 } 818 } 819 } 820 821 822 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv, 823 char *data, int len) 824 { 825 struct iw_event iwe_buf, *iwe = &iwe_buf; 826 char *pos, *end, *custom, *buf; 827 828 pos = data; 829 end = data + len; 830 831 while (pos + IW_EV_LCP_LEN <= end) { 832 /* Event data may be unaligned, so make a local, aligned copy 833 * before processing. */ 834 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); 835 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d", 836 iwe->cmd, iwe->len); 837 if (iwe->len <= IW_EV_LCP_LEN) 838 return; 839 840 custom = pos + IW_EV_POINT_LEN; 841 if (drv->we_version > 18 && 842 (iwe->cmd == IWEVMICHAELMICFAILURE || 843 iwe->cmd == IWEVCUSTOM)) { 844 /* WE-19 removed the pointer from struct iw_point */ 845 char *dpos = (char *) &iwe_buf.u.data.length; 846 int dlen = dpos - (char *) &iwe_buf; 847 memcpy(dpos, pos + IW_EV_LCP_LEN, 848 sizeof(struct iw_event) - dlen); 849 } else { 850 memcpy(&iwe_buf, pos, sizeof(struct iw_event)); 851 custom += IW_EV_POINT_OFF; 852 } 853 854 switch (iwe->cmd) { 855 case IWEVCUSTOM: 856 if (custom + iwe->u.data.length > end) 857 return; 858 buf = malloc(iwe->u.data.length + 1); 859 if (buf == NULL) 860 return; 861 memcpy(buf, custom, iwe->u.data.length); 862 buf[iwe->u.data.length] = '\0'; 863 hostapd_wireless_event_wireless_custom(drv, buf); 864 free(buf); 865 break; 866 } 867 868 pos += iwe->len; 869 } 870 } 871 872 873 static void hostapd_wireless_event_rtm_newlink(void *ctx, 874 struct ifinfomsg *ifi, 875 u8 *buf, size_t len) 876 { 877 struct hostap_driver_data *drv = ctx; 878 int attrlen, rta_len; 879 struct rtattr *attr; 880 881 /* TODO: use ifi->ifi_index to filter out wireless events from other 882 * interfaces */ 883 884 attrlen = len; 885 attr = (struct rtattr *) buf; 886 887 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 888 while (RTA_OK(attr, attrlen)) { 889 if (attr->rta_type == IFLA_WIRELESS) { 890 hostapd_wireless_event_wireless( 891 drv, ((char *) attr) + rta_len, 892 attr->rta_len - rta_len); 893 } 894 attr = RTA_NEXT(attr, attrlen); 895 } 896 } 897 898 899 static int hostap_get_we_version(struct hostap_driver_data *drv) 900 { 901 struct iw_range *range; 902 struct iwreq iwr; 903 int minlen; 904 size_t buflen; 905 906 drv->we_version = 0; 907 908 /* 909 * Use larger buffer than struct iw_range in order to allow the 910 * structure to grow in the future. 911 */ 912 buflen = sizeof(struct iw_range) + 500; 913 range = os_zalloc(buflen); 914 if (range == NULL) 915 return -1; 916 917 memset(&iwr, 0, sizeof(iwr)); 918 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 919 iwr.u.data.pointer = (caddr_t) range; 920 iwr.u.data.length = buflen; 921 922 minlen = ((char *) &range->enc_capa) - (char *) range + 923 sizeof(range->enc_capa); 924 925 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) { 926 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s", 927 strerror(errno)); 928 os_free(range); 929 return -1; 930 } else if (iwr.u.data.length >= minlen && 931 range->we_version_compiled >= 18) { 932 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d " 933 "WE(source)=%d enc_capa=0x%x", 934 range->we_version_compiled, 935 range->we_version_source, 936 range->enc_capa); 937 drv->we_version = range->we_version_compiled; 938 } 939 940 free(range); 941 return 0; 942 } 943 944 945 static int hostap_wireless_event_init(struct hostap_driver_data *drv) 946 { 947 struct netlink_config *cfg; 948 949 hostap_get_we_version(drv); 950 951 cfg = os_zalloc(sizeof(*cfg)); 952 if (cfg == NULL) 953 return -1; 954 cfg->ctx = drv; 955 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink; 956 drv->netlink = netlink_init(cfg); 957 if (drv->netlink == NULL) { 958 os_free(cfg); 959 return -1; 960 } 961 962 return 0; 963 } 964 965 966 static void * hostap_init(struct hostapd_data *hapd, 967 struct wpa_init_params *params) 968 { 969 struct hostap_driver_data *drv; 970 971 drv = os_zalloc(sizeof(struct hostap_driver_data)); 972 if (drv == NULL) { 973 printf("Could not allocate memory for hostapd driver data\n"); 974 return NULL; 975 } 976 977 drv->hapd = hapd; 978 drv->ioctl_sock = drv->sock = -1; 979 memcpy(drv->iface, params->ifname, sizeof(drv->iface)); 980 981 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); 982 if (drv->ioctl_sock < 0) { 983 wpa_printf(MSG_ERROR, "socket[PF_INET,SOCK_DGRAM]: %s", 984 strerror(errno)); 985 os_free(drv); 986 return NULL; 987 } 988 989 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) { 990 wpa_printf(MSG_ERROR, 991 "Could not enable hostapd mode for interface %s", 992 drv->iface); 993 close(drv->ioctl_sock); 994 os_free(drv); 995 return NULL; 996 } 997 998 if (hostap_init_sockets(drv, params->own_addr) || 999 hostap_wireless_event_init(drv)) { 1000 close(drv->ioctl_sock); 1001 os_free(drv); 1002 return NULL; 1003 } 1004 1005 return drv; 1006 } 1007 1008 1009 static void hostap_driver_deinit(void *priv) 1010 { 1011 struct hostap_driver_data *drv = priv; 1012 1013 netlink_deinit(drv->netlink); 1014 (void) hostap_set_iface_flags(drv, 0); 1015 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0); 1016 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0); 1017 1018 if (drv->ioctl_sock >= 0) 1019 close(drv->ioctl_sock); 1020 1021 if (drv->sock >= 0) 1022 close(drv->sock); 1023 1024 os_free(drv->generic_ie); 1025 os_free(drv->wps_ie); 1026 1027 free(drv); 1028 } 1029 1030 1031 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr, 1032 int reason) 1033 { 1034 struct hostap_driver_data *drv = priv; 1035 struct ieee80211_mgmt mgmt; 1036 1037 if (is_broadcast_ether_addr(addr)) { 1038 /* 1039 * New Prism2.5/3 STA firmware versions seem to have issues 1040 * with this broadcast deauth frame. This gets the firmware in 1041 * odd state where nothing works correctly, so let's skip 1042 * sending this for the hostap driver. 1043 */ 1044 return 0; 1045 } 1046 1047 memset(&mgmt, 0, sizeof(mgmt)); 1048 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1049 WLAN_FC_STYPE_DEAUTH); 1050 memcpy(mgmt.da, addr, ETH_ALEN); 1051 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1052 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1053 mgmt.u.deauth.reason_code = host_to_le16(reason); 1054 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1055 sizeof(mgmt.u.deauth), 0); 1056 } 1057 1058 1059 static int hostap_set_freq(void *priv, struct hostapd_freq_params *freq) 1060 { 1061 struct hostap_driver_data *drv = priv; 1062 struct iwreq iwr; 1063 1064 os_memset(&iwr, 0, sizeof(iwr)); 1065 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 1066 iwr.u.freq.m = freq->channel; 1067 iwr.u.freq.e = 0; 1068 1069 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) { 1070 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s", 1071 strerror(errno)); 1072 return -1; 1073 } 1074 1075 return 0; 1076 } 1077 1078 1079 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr, 1080 int reason) 1081 { 1082 struct hostap_driver_data *drv = priv; 1083 struct ieee80211_mgmt mgmt; 1084 1085 memset(&mgmt, 0, sizeof(mgmt)); 1086 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1087 WLAN_FC_STYPE_DISASSOC); 1088 memcpy(mgmt.da, addr, ETH_ALEN); 1089 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1090 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1091 mgmt.u.disassoc.reason_code = host_to_le16(reason); 1092 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1093 sizeof(mgmt.u.disassoc), 0); 1094 } 1095 1096 1097 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv, 1098 u16 *num_modes, 1099 u16 *flags) 1100 { 1101 struct hostapd_hw_modes *mode; 1102 int i, clen, rlen; 1103 const short chan2freq[14] = { 1104 2412, 2417, 2422, 2427, 2432, 2437, 2442, 1105 2447, 2452, 2457, 2462, 2467, 2472, 2484 1106 }; 1107 1108 mode = os_zalloc(sizeof(struct hostapd_hw_modes)); 1109 if (mode == NULL) 1110 return NULL; 1111 1112 *num_modes = 1; 1113 *flags = 0; 1114 1115 mode->mode = HOSTAPD_MODE_IEEE80211B; 1116 mode->num_channels = 14; 1117 mode->num_rates = 4; 1118 1119 clen = mode->num_channels * sizeof(struct hostapd_channel_data); 1120 rlen = mode->num_rates * sizeof(int); 1121 1122 mode->channels = os_zalloc(clen); 1123 mode->rates = os_zalloc(rlen); 1124 if (mode->channels == NULL || mode->rates == NULL) { 1125 os_free(mode->channels); 1126 os_free(mode->rates); 1127 os_free(mode); 1128 return NULL; 1129 } 1130 1131 for (i = 0; i < 14; i++) { 1132 mode->channels[i].chan = i + 1; 1133 mode->channels[i].freq = chan2freq[i]; 1134 /* TODO: Get allowed channel list from the driver */ 1135 if (i >= 11) 1136 mode->channels[i].flag = HOSTAPD_CHAN_DISABLED; 1137 } 1138 1139 mode->rates[0] = 10; 1140 mode->rates[1] = 20; 1141 mode->rates[2] = 55; 1142 mode->rates[3] = 110; 1143 1144 return mode; 1145 } 1146 1147 1148 static void wpa_driver_hostap_poll_client(void *priv, const u8 *own_addr, 1149 const u8 *addr, int qos) 1150 { 1151 struct ieee80211_hdr hdr; 1152 1153 os_memset(&hdr, 0, sizeof(hdr)); 1154 1155 /* 1156 * WLAN_FC_STYPE_NULLFUNC would be more appropriate, 1157 * but it is apparently not retried so TX Exc events 1158 * are not received for it. 1159 * This is the reason the driver overrides the default 1160 * handling. 1161 */ 1162 hdr.frame_control = IEEE80211_FC(WLAN_FC_TYPE_DATA, 1163 WLAN_FC_STYPE_DATA); 1164 1165 hdr.frame_control |= 1166 host_to_le16(WLAN_FC_FROMDS); 1167 os_memcpy(hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN); 1168 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 1169 os_memcpy(hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 1170 1171 hostap_send_mlme(priv, (u8 *)&hdr, sizeof(hdr), 0); 1172 } 1173 1174 1175 const struct wpa_driver_ops wpa_driver_hostap_ops = { 1176 .name = "hostap", 1177 .desc = "Host AP driver (Intersil Prism2/2.5/3)", 1178 .set_key = wpa_driver_hostap_set_key, 1179 .hapd_init = hostap_init, 1180 .hapd_deinit = hostap_driver_deinit, 1181 .set_ieee8021x = hostap_set_ieee8021x, 1182 .set_privacy = hostap_set_privacy, 1183 .get_seqnum = hostap_get_seqnum, 1184 .flush = hostap_flush, 1185 .set_generic_elem = hostap_set_generic_elem, 1186 .read_sta_data = hostap_read_sta_data, 1187 .hapd_send_eapol = hostap_send_eapol, 1188 .sta_set_flags = hostap_sta_set_flags, 1189 .sta_deauth = hostap_sta_deauth, 1190 .sta_disassoc = hostap_sta_disassoc, 1191 .sta_remove = hostap_sta_remove, 1192 .hapd_set_ssid = hostap_set_ssid, 1193 .send_mlme = hostap_send_mlme, 1194 .sta_add = hostap_sta_add, 1195 .get_inact_sec = hostap_get_inact_sec, 1196 .sta_clear_stats = hostap_sta_clear_stats, 1197 .get_hw_feature_data = hostap_get_hw_feature_data, 1198 .set_ap_wps_ie = hostap_set_ap_wps_ie, 1199 .set_freq = hostap_set_freq, 1200 .poll_client = wpa_driver_hostap_poll_client, 1201 }; 1202