1 /* 2 * Driver interaction with Linux Host AP driver 3 * Copyright (c) 2003-2005, Jouni Malinen <j (at) 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 unsigned int freq) 271 { 272 struct hostap_driver_data *drv = priv; 273 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg; 274 int res; 275 276 /* Request TX callback */ 277 hdr->frame_control |= host_to_le16(BIT(1)); 278 res = send(drv->sock, msg, len, 0); 279 hdr->frame_control &= ~host_to_le16(BIT(1)); 280 281 return res; 282 } 283 284 285 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data, 286 size_t data_len, int encrypt, const u8 *own_addr, 287 u32 flags) 288 { 289 struct hostap_driver_data *drv = priv; 290 struct ieee80211_hdr *hdr; 291 size_t len; 292 u8 *pos; 293 int res; 294 295 len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len; 296 hdr = os_zalloc(len); 297 if (hdr == NULL) { 298 printf("malloc() failed for hostapd_send_data(len=%lu)\n", 299 (unsigned long) len); 300 return -1; 301 } 302 303 hdr->frame_control = 304 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA); 305 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS); 306 if (encrypt) 307 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP); 308 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN); 309 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 310 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 311 312 pos = (u8 *) (hdr + 1); 313 memcpy(pos, rfc1042_header, sizeof(rfc1042_header)); 314 pos += sizeof(rfc1042_header); 315 *((u16 *) pos) = htons(ETH_P_PAE); 316 pos += 2; 317 memcpy(pos, data, data_len); 318 319 res = hostap_send_mlme(drv, (u8 *) hdr, len, 0); 320 if (res < 0) { 321 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - " 322 "failed: %d (%s)", 323 (unsigned long) len, errno, strerror(errno)); 324 } 325 os_free(hdr); 326 327 return res; 328 } 329 330 331 static int hostap_sta_set_flags(void *priv, const u8 *addr, 332 int total_flags, int flags_or, int flags_and) 333 { 334 struct hostap_driver_data *drv = priv; 335 struct prism2_hostapd_param param; 336 337 if (flags_or & WPA_STA_AUTHORIZED) 338 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */ 339 if (!(flags_and & WPA_STA_AUTHORIZED)) 340 flags_and = ~BIT(5); 341 else 342 flags_and = ~0; 343 memset(¶m, 0, sizeof(param)); 344 param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA; 345 memcpy(param.sta_addr, addr, ETH_ALEN); 346 param.u.set_flags_sta.flags_or = flags_or; 347 param.u.set_flags_sta.flags_and = flags_and; 348 return hostapd_ioctl(drv, ¶m, sizeof(param)); 349 } 350 351 352 static int hostap_set_iface_flags(void *priv, int dev_up) 353 { 354 struct hostap_driver_data *drv = priv; 355 struct ifreq ifr; 356 char ifname[IFNAMSIZ]; 357 358 os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface); 359 if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0) 360 return -1; 361 362 if (dev_up) { 363 memset(&ifr, 0, sizeof(ifr)); 364 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); 365 ifr.ifr_mtu = HOSTAPD_MTU; 366 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) { 367 wpa_printf(MSG_INFO, 368 "Setting MTU failed - trying to survive with current value: ioctl[SIOCSIFMTU]: %s", 369 strerror(errno)); 370 } 371 } 372 373 return 0; 374 } 375 376 377 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param, 378 int len) 379 { 380 struct hostap_driver_data *drv = priv; 381 struct iwreq iwr; 382 383 memset(&iwr, 0, sizeof(iwr)); 384 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 385 iwr.u.data.pointer = (caddr_t) param; 386 iwr.u.data.length = len; 387 388 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) { 389 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_HOSTAPD]: %s", 390 strerror(errno)); 391 return -1; 392 } 393 394 return 0; 395 } 396 397 398 static int wpa_driver_hostap_set_key(const char *ifname, void *priv, 399 enum wpa_alg alg, const u8 *addr, 400 int key_idx, int set_tx, 401 const u8 *seq, size_t seq_len, 402 const u8 *key, size_t key_len) 403 { 404 struct hostap_driver_data *drv = priv; 405 struct prism2_hostapd_param *param; 406 u8 *buf; 407 size_t blen; 408 int ret = 0; 409 410 blen = sizeof(*param) + key_len; 411 buf = os_zalloc(blen); 412 if (buf == NULL) 413 return -1; 414 415 param = (struct prism2_hostapd_param *) buf; 416 param->cmd = PRISM2_SET_ENCRYPTION; 417 if (addr == NULL) 418 memset(param->sta_addr, 0xff, ETH_ALEN); 419 else 420 memcpy(param->sta_addr, addr, ETH_ALEN); 421 switch (alg) { 422 case WPA_ALG_NONE: 423 os_strlcpy((char *) param->u.crypt.alg, "NONE", 424 HOSTAP_CRYPT_ALG_NAME_LEN); 425 break; 426 case WPA_ALG_WEP: 427 os_strlcpy((char *) param->u.crypt.alg, "WEP", 428 HOSTAP_CRYPT_ALG_NAME_LEN); 429 break; 430 case WPA_ALG_TKIP: 431 os_strlcpy((char *) param->u.crypt.alg, "TKIP", 432 HOSTAP_CRYPT_ALG_NAME_LEN); 433 break; 434 case WPA_ALG_CCMP: 435 os_strlcpy((char *) param->u.crypt.alg, "CCMP", 436 HOSTAP_CRYPT_ALG_NAME_LEN); 437 break; 438 default: 439 os_free(buf); 440 return -1; 441 } 442 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0; 443 param->u.crypt.idx = key_idx; 444 param->u.crypt.key_len = key_len; 445 memcpy((u8 *) (param + 1), key, key_len); 446 447 if (hostapd_ioctl(drv, param, blen)) { 448 printf("Failed to set encryption.\n"); 449 ret = -1; 450 } 451 free(buf); 452 453 return ret; 454 } 455 456 457 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr, 458 int idx, u8 *seq) 459 { 460 struct hostap_driver_data *drv = priv; 461 struct prism2_hostapd_param *param; 462 u8 *buf; 463 size_t blen; 464 int ret = 0; 465 466 blen = sizeof(*param) + 32; 467 buf = os_zalloc(blen); 468 if (buf == NULL) 469 return -1; 470 471 param = (struct prism2_hostapd_param *) buf; 472 param->cmd = PRISM2_GET_ENCRYPTION; 473 if (addr == NULL) 474 os_memset(param->sta_addr, 0xff, ETH_ALEN); 475 else 476 os_memcpy(param->sta_addr, addr, ETH_ALEN); 477 param->u.crypt.idx = idx; 478 479 if (hostapd_ioctl(drv, param, blen)) { 480 printf("Failed to get encryption.\n"); 481 ret = -1; 482 } else { 483 os_memcpy(seq, param->u.crypt.seq, 8); 484 } 485 os_free(buf); 486 487 return ret; 488 } 489 490 491 static int hostap_ioctl_prism2param(void *priv, int param, int value) 492 { 493 struct hostap_driver_data *drv = priv; 494 struct iwreq iwr; 495 int *i; 496 497 memset(&iwr, 0, sizeof(iwr)); 498 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 499 i = (int *) iwr.u.name; 500 *i++ = param; 501 *i++ = value; 502 503 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) { 504 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_PRISM2_PARAM]: %s", 505 strerror(errno)); 506 return -1; 507 } 508 509 return 0; 510 } 511 512 513 static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params) 514 { 515 struct hostap_driver_data *drv = priv; 516 int enabled = params->enabled; 517 518 /* enable kernel driver support for IEEE 802.1X */ 519 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) { 520 printf("Could not setup IEEE 802.1X support in kernel driver." 521 "\n"); 522 return -1; 523 } 524 525 if (!enabled) 526 return 0; 527 528 /* use host driver implementation of encryption to allow 529 * individual keys and passing plaintext EAPOL frames */ 530 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) || 531 hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) { 532 printf("Could not setup host-based encryption in kernel " 533 "driver.\n"); 534 return -1; 535 } 536 537 return 0; 538 } 539 540 541 static int hostap_set_privacy(void *priv, int enabled) 542 { 543 struct hostap_drvier_data *drv = priv; 544 545 return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED, 546 enabled); 547 } 548 549 550 static int hostap_set_ssid(void *priv, const u8 *buf, int len) 551 { 552 struct hostap_driver_data *drv = priv; 553 struct iwreq iwr; 554 555 memset(&iwr, 0, sizeof(iwr)); 556 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 557 iwr.u.essid.flags = 1; /* SSID active */ 558 iwr.u.essid.pointer = (caddr_t) buf; 559 iwr.u.essid.length = len + 1; 560 561 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) { 562 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID,len=%d]: %s", 563 len, strerror(errno)); 564 return -1; 565 } 566 567 return 0; 568 } 569 570 571 static int hostap_flush(void *priv) 572 { 573 struct hostap_driver_data *drv = priv; 574 struct prism2_hostapd_param param; 575 576 memset(¶m, 0, sizeof(param)); 577 param.cmd = PRISM2_HOSTAPD_FLUSH; 578 return hostapd_ioctl(drv, ¶m, sizeof(param)); 579 } 580 581 582 static int hostap_read_sta_data(void *priv, 583 struct hostap_sta_driver_data *data, 584 const u8 *addr) 585 { 586 struct hostap_driver_data *drv = priv; 587 char buf[1024], line[128], *pos; 588 FILE *f; 589 unsigned long val; 590 591 memset(data, 0, sizeof(*data)); 592 snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR, 593 drv->iface, MAC2STR(addr)); 594 595 f = fopen(buf, "r"); 596 if (!f) 597 return -1; 598 /* Need to read proc file with in one piece, so use large enough 599 * buffer. */ 600 setbuffer(f, buf, sizeof(buf)); 601 602 while (fgets(line, sizeof(line), f)) { 603 pos = strchr(line, '='); 604 if (!pos) 605 continue; 606 *pos++ = '\0'; 607 val = strtoul(pos, NULL, 10); 608 if (strcmp(line, "rx_packets") == 0) 609 data->rx_packets = val; 610 else if (strcmp(line, "tx_packets") == 0) 611 data->tx_packets = val; 612 else if (strcmp(line, "rx_bytes") == 0) 613 data->rx_bytes = val; 614 else if (strcmp(line, "tx_bytes") == 0) 615 data->tx_bytes = val; 616 } 617 618 fclose(f); 619 620 return 0; 621 } 622 623 624 static int hostap_sta_add(void *priv, struct hostapd_sta_add_params *params) 625 { 626 struct hostap_driver_data *drv = priv; 627 struct prism2_hostapd_param param; 628 int tx_supp_rates = 0; 629 size_t i; 630 631 #define WLAN_RATE_1M BIT(0) 632 #define WLAN_RATE_2M BIT(1) 633 #define WLAN_RATE_5M5 BIT(2) 634 #define WLAN_RATE_11M BIT(3) 635 636 for (i = 0; i < params->supp_rates_len; i++) { 637 if ((params->supp_rates[i] & 0x7f) == 2) 638 tx_supp_rates |= WLAN_RATE_1M; 639 if ((params->supp_rates[i] & 0x7f) == 4) 640 tx_supp_rates |= WLAN_RATE_2M; 641 if ((params->supp_rates[i] & 0x7f) == 11) 642 tx_supp_rates |= WLAN_RATE_5M5; 643 if ((params->supp_rates[i] & 0x7f) == 22) 644 tx_supp_rates |= WLAN_RATE_11M; 645 } 646 647 memset(¶m, 0, sizeof(param)); 648 param.cmd = PRISM2_HOSTAPD_ADD_STA; 649 memcpy(param.sta_addr, params->addr, ETH_ALEN); 650 param.u.add_sta.aid = params->aid; 651 param.u.add_sta.capability = params->capability; 652 param.u.add_sta.tx_supp_rates = tx_supp_rates; 653 return hostapd_ioctl(drv, ¶m, sizeof(param)); 654 } 655 656 657 static int hostap_sta_remove(void *priv, const u8 *addr) 658 { 659 struct hostap_driver_data *drv = priv; 660 struct prism2_hostapd_param param; 661 662 hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED); 663 664 memset(¶m, 0, sizeof(param)); 665 param.cmd = PRISM2_HOSTAPD_REMOVE_STA; 666 memcpy(param.sta_addr, addr, ETH_ALEN); 667 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 668 printf("Could not remove station from kernel driver.\n"); 669 return -1; 670 } 671 return 0; 672 } 673 674 675 static int hostap_get_inact_sec(void *priv, const u8 *addr) 676 { 677 struct hostap_driver_data *drv = priv; 678 struct prism2_hostapd_param param; 679 680 memset(¶m, 0, sizeof(param)); 681 param.cmd = PRISM2_HOSTAPD_GET_INFO_STA; 682 memcpy(param.sta_addr, addr, ETH_ALEN); 683 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 684 return -1; 685 } 686 687 return param.u.get_info_sta.inactive_sec; 688 } 689 690 691 static int hostap_sta_clear_stats(void *priv, const u8 *addr) 692 { 693 struct hostap_driver_data *drv = priv; 694 struct prism2_hostapd_param param; 695 696 memset(¶m, 0, sizeof(param)); 697 param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS; 698 memcpy(param.sta_addr, addr, ETH_ALEN); 699 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 700 return -1; 701 } 702 703 return 0; 704 } 705 706 707 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv) 708 { 709 struct prism2_hostapd_param *param; 710 int res; 711 size_t blen, elem_len; 712 713 elem_len = drv->generic_ie_len + drv->wps_ie_len; 714 blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len; 715 if (blen < sizeof(*param)) 716 blen = sizeof(*param); 717 718 param = os_zalloc(blen); 719 if (param == NULL) 720 return -1; 721 722 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT; 723 param->u.generic_elem.len = elem_len; 724 if (drv->generic_ie) { 725 os_memcpy(param->u.generic_elem.data, drv->generic_ie, 726 drv->generic_ie_len); 727 } 728 if (drv->wps_ie) { 729 os_memcpy(¶m->u.generic_elem.data[drv->generic_ie_len], 730 drv->wps_ie, drv->wps_ie_len); 731 } 732 wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE", 733 param->u.generic_elem.data, elem_len); 734 res = hostapd_ioctl(drv, param, blen); 735 736 os_free(param); 737 738 return res; 739 } 740 741 742 static int hostap_set_generic_elem(void *priv, 743 const u8 *elem, size_t elem_len) 744 { 745 struct hostap_driver_data *drv = priv; 746 747 os_free(drv->generic_ie); 748 drv->generic_ie = NULL; 749 drv->generic_ie_len = 0; 750 if (elem) { 751 drv->generic_ie = os_malloc(elem_len); 752 if (drv->generic_ie == NULL) 753 return -1; 754 os_memcpy(drv->generic_ie, elem, elem_len); 755 drv->generic_ie_len = elem_len; 756 } 757 758 return hostapd_ioctl_set_generic_elem(drv); 759 } 760 761 762 static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon, 763 const struct wpabuf *proberesp, 764 const struct wpabuf *assocresp) 765 { 766 struct hostap_driver_data *drv = priv; 767 768 /* 769 * Host AP driver supports only one set of extra IEs, so we need to 770 * use the Probe Response IEs also for Beacon frames since they include 771 * more information. 772 */ 773 774 os_free(drv->wps_ie); 775 drv->wps_ie = NULL; 776 drv->wps_ie_len = 0; 777 if (proberesp) { 778 drv->wps_ie = os_malloc(wpabuf_len(proberesp)); 779 if (drv->wps_ie == NULL) 780 return -1; 781 os_memcpy(drv->wps_ie, wpabuf_head(proberesp), 782 wpabuf_len(proberesp)); 783 drv->wps_ie_len = wpabuf_len(proberesp); 784 } 785 786 return hostapd_ioctl_set_generic_elem(drv); 787 } 788 789 790 static void 791 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv, 792 char *custom) 793 { 794 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom); 795 796 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) { 797 char *pos; 798 u8 addr[ETH_ALEN]; 799 pos = strstr(custom, "addr="); 800 if (pos == NULL) { 801 wpa_printf(MSG_DEBUG, 802 "MLME-MICHAELMICFAILURE.indication " 803 "without sender address ignored"); 804 return; 805 } 806 pos += 5; 807 if (hwaddr_aton(pos, addr) == 0) { 808 union wpa_event_data data; 809 os_memset(&data, 0, sizeof(data)); 810 data.michael_mic_failure.unicast = 1; 811 data.michael_mic_failure.src = addr; 812 wpa_supplicant_event(drv->hapd, 813 EVENT_MICHAEL_MIC_FAILURE, &data); 814 } else { 815 wpa_printf(MSG_DEBUG, 816 "MLME-MICHAELMICFAILURE.indication " 817 "with invalid MAC address"); 818 } 819 } 820 } 821 822 823 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv, 824 char *data, int len) 825 { 826 struct iw_event iwe_buf, *iwe = &iwe_buf; 827 char *pos, *end, *custom, *buf; 828 829 pos = data; 830 end = data + len; 831 832 while (pos + IW_EV_LCP_LEN <= end) { 833 /* Event data may be unaligned, so make a local, aligned copy 834 * before processing. */ 835 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); 836 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d", 837 iwe->cmd, iwe->len); 838 if (iwe->len <= IW_EV_LCP_LEN) 839 return; 840 841 custom = pos + IW_EV_POINT_LEN; 842 if (drv->we_version > 18 && 843 (iwe->cmd == IWEVMICHAELMICFAILURE || 844 iwe->cmd == IWEVCUSTOM)) { 845 /* WE-19 removed the pointer from struct iw_point */ 846 char *dpos = (char *) &iwe_buf.u.data.length; 847 int dlen = dpos - (char *) &iwe_buf; 848 memcpy(dpos, pos + IW_EV_LCP_LEN, 849 sizeof(struct iw_event) - dlen); 850 } else { 851 memcpy(&iwe_buf, pos, sizeof(struct iw_event)); 852 custom += IW_EV_POINT_OFF; 853 } 854 855 switch (iwe->cmd) { 856 case IWEVCUSTOM: 857 if (custom + iwe->u.data.length > end) 858 return; 859 buf = malloc(iwe->u.data.length + 1); 860 if (buf == NULL) 861 return; 862 memcpy(buf, custom, iwe->u.data.length); 863 buf[iwe->u.data.length] = '\0'; 864 hostapd_wireless_event_wireless_custom(drv, buf); 865 free(buf); 866 break; 867 } 868 869 pos += iwe->len; 870 } 871 } 872 873 874 static void hostapd_wireless_event_rtm_newlink(void *ctx, 875 struct ifinfomsg *ifi, 876 u8 *buf, size_t len) 877 { 878 struct hostap_driver_data *drv = ctx; 879 int attrlen, rta_len; 880 struct rtattr *attr; 881 882 /* TODO: use ifi->ifi_index to filter out wireless events from other 883 * interfaces */ 884 885 attrlen = len; 886 attr = (struct rtattr *) buf; 887 888 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 889 while (RTA_OK(attr, attrlen)) { 890 if (attr->rta_type == IFLA_WIRELESS) { 891 hostapd_wireless_event_wireless( 892 drv, ((char *) attr) + rta_len, 893 attr->rta_len - rta_len); 894 } 895 attr = RTA_NEXT(attr, attrlen); 896 } 897 } 898 899 900 static int hostap_get_we_version(struct hostap_driver_data *drv) 901 { 902 struct iw_range *range; 903 struct iwreq iwr; 904 int minlen; 905 size_t buflen; 906 907 drv->we_version = 0; 908 909 /* 910 * Use larger buffer than struct iw_range in order to allow the 911 * structure to grow in the future. 912 */ 913 buflen = sizeof(struct iw_range) + 500; 914 range = os_zalloc(buflen); 915 if (range == NULL) 916 return -1; 917 918 memset(&iwr, 0, sizeof(iwr)); 919 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 920 iwr.u.data.pointer = (caddr_t) range; 921 iwr.u.data.length = buflen; 922 923 minlen = ((char *) &range->enc_capa) - (char *) range + 924 sizeof(range->enc_capa); 925 926 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) { 927 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s", 928 strerror(errno)); 929 os_free(range); 930 return -1; 931 } else if (iwr.u.data.length >= minlen && 932 range->we_version_compiled >= 18) { 933 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d " 934 "WE(source)=%d enc_capa=0x%x", 935 range->we_version_compiled, 936 range->we_version_source, 937 range->enc_capa); 938 drv->we_version = range->we_version_compiled; 939 } 940 941 free(range); 942 return 0; 943 } 944 945 946 static int hostap_wireless_event_init(struct hostap_driver_data *drv) 947 { 948 struct netlink_config *cfg; 949 950 hostap_get_we_version(drv); 951 952 cfg = os_zalloc(sizeof(*cfg)); 953 if (cfg == NULL) 954 return -1; 955 cfg->ctx = drv; 956 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink; 957 drv->netlink = netlink_init(cfg); 958 if (drv->netlink == NULL) { 959 os_free(cfg); 960 return -1; 961 } 962 963 return 0; 964 } 965 966 967 static void * hostap_init(struct hostapd_data *hapd, 968 struct wpa_init_params *params) 969 { 970 struct hostap_driver_data *drv; 971 972 drv = os_zalloc(sizeof(struct hostap_driver_data)); 973 if (drv == NULL) { 974 printf("Could not allocate memory for hostapd driver data\n"); 975 return NULL; 976 } 977 978 drv->hapd = hapd; 979 drv->ioctl_sock = drv->sock = -1; 980 memcpy(drv->iface, params->ifname, sizeof(drv->iface)); 981 982 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); 983 if (drv->ioctl_sock < 0) { 984 wpa_printf(MSG_ERROR, "socket[PF_INET,SOCK_DGRAM]: %s", 985 strerror(errno)); 986 os_free(drv); 987 return NULL; 988 } 989 990 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) { 991 wpa_printf(MSG_ERROR, 992 "Could not enable hostapd mode for interface %s", 993 drv->iface); 994 close(drv->ioctl_sock); 995 os_free(drv); 996 return NULL; 997 } 998 999 if (hostap_init_sockets(drv, params->own_addr) || 1000 hostap_wireless_event_init(drv)) { 1001 close(drv->ioctl_sock); 1002 os_free(drv); 1003 return NULL; 1004 } 1005 1006 return drv; 1007 } 1008 1009 1010 static void hostap_driver_deinit(void *priv) 1011 { 1012 struct hostap_driver_data *drv = priv; 1013 1014 netlink_deinit(drv->netlink); 1015 (void) hostap_set_iface_flags(drv, 0); 1016 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0); 1017 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0); 1018 1019 if (drv->ioctl_sock >= 0) 1020 close(drv->ioctl_sock); 1021 1022 if (drv->sock >= 0) 1023 close(drv->sock); 1024 1025 os_free(drv->generic_ie); 1026 os_free(drv->wps_ie); 1027 1028 free(drv); 1029 } 1030 1031 1032 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr, 1033 int reason) 1034 { 1035 struct hostap_driver_data *drv = priv; 1036 struct ieee80211_mgmt mgmt; 1037 1038 if (is_broadcast_ether_addr(addr)) { 1039 /* 1040 * New Prism2.5/3 STA firmware versions seem to have issues 1041 * with this broadcast deauth frame. This gets the firmware in 1042 * odd state where nothing works correctly, so let's skip 1043 * sending this for the hostap driver. 1044 */ 1045 return 0; 1046 } 1047 1048 memset(&mgmt, 0, sizeof(mgmt)); 1049 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1050 WLAN_FC_STYPE_DEAUTH); 1051 memcpy(mgmt.da, addr, ETH_ALEN); 1052 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1053 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1054 mgmt.u.deauth.reason_code = host_to_le16(reason); 1055 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1056 sizeof(mgmt.u.deauth), 0); 1057 } 1058 1059 1060 static int hostap_set_freq(void *priv, struct hostapd_freq_params *freq) 1061 { 1062 struct hostap_driver_data *drv = priv; 1063 struct iwreq iwr; 1064 1065 os_memset(&iwr, 0, sizeof(iwr)); 1066 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 1067 iwr.u.freq.m = freq->channel; 1068 iwr.u.freq.e = 0; 1069 1070 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) { 1071 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s", 1072 strerror(errno)); 1073 return -1; 1074 } 1075 1076 return 0; 1077 } 1078 1079 1080 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr, 1081 int reason) 1082 { 1083 struct hostap_driver_data *drv = priv; 1084 struct ieee80211_mgmt mgmt; 1085 1086 memset(&mgmt, 0, sizeof(mgmt)); 1087 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1088 WLAN_FC_STYPE_DISASSOC); 1089 memcpy(mgmt.da, addr, ETH_ALEN); 1090 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1091 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1092 mgmt.u.disassoc.reason_code = host_to_le16(reason); 1093 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1094 sizeof(mgmt.u.disassoc), 0); 1095 } 1096 1097 1098 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv, 1099 u16 *num_modes, 1100 u16 *flags) 1101 { 1102 struct hostapd_hw_modes *mode; 1103 int i, clen, rlen; 1104 const short chan2freq[14] = { 1105 2412, 2417, 2422, 2427, 2432, 2437, 2442, 1106 2447, 2452, 2457, 2462, 2467, 2472, 2484 1107 }; 1108 1109 mode = os_zalloc(sizeof(struct hostapd_hw_modes)); 1110 if (mode == NULL) 1111 return NULL; 1112 1113 *num_modes = 1; 1114 *flags = 0; 1115 1116 mode->mode = HOSTAPD_MODE_IEEE80211B; 1117 mode->num_channels = 14; 1118 mode->num_rates = 4; 1119 1120 clen = mode->num_channels * sizeof(struct hostapd_channel_data); 1121 rlen = mode->num_rates * sizeof(int); 1122 1123 mode->channels = os_zalloc(clen); 1124 mode->rates = os_zalloc(rlen); 1125 if (mode->channels == NULL || mode->rates == NULL) { 1126 os_free(mode->channels); 1127 os_free(mode->rates); 1128 os_free(mode); 1129 return NULL; 1130 } 1131 1132 for (i = 0; i < 14; i++) { 1133 mode->channels[i].chan = i + 1; 1134 mode->channels[i].freq = chan2freq[i]; 1135 /* TODO: Get allowed channel list from the driver */ 1136 if (i >= 11) 1137 mode->channels[i].flag = HOSTAPD_CHAN_DISABLED; 1138 } 1139 1140 mode->rates[0] = 10; 1141 mode->rates[1] = 20; 1142 mode->rates[2] = 55; 1143 mode->rates[3] = 110; 1144 1145 return mode; 1146 } 1147 1148 1149 static void wpa_driver_hostap_poll_client(void *priv, const u8 *own_addr, 1150 const u8 *addr, int qos) 1151 { 1152 struct ieee80211_hdr hdr; 1153 1154 os_memset(&hdr, 0, sizeof(hdr)); 1155 1156 /* 1157 * WLAN_FC_STYPE_NULLFUNC would be more appropriate, 1158 * but it is apparently not retried so TX Exc events 1159 * are not received for it. 1160 * This is the reason the driver overrides the default 1161 * handling. 1162 */ 1163 hdr.frame_control = IEEE80211_FC(WLAN_FC_TYPE_DATA, 1164 WLAN_FC_STYPE_DATA); 1165 1166 hdr.frame_control |= 1167 host_to_le16(WLAN_FC_FROMDS); 1168 os_memcpy(hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN); 1169 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 1170 os_memcpy(hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 1171 1172 hostap_send_mlme(priv, (u8 *)&hdr, sizeof(hdr), 0); 1173 } 1174 1175 1176 const struct wpa_driver_ops wpa_driver_hostap_ops = { 1177 .name = "hostap", 1178 .desc = "Host AP driver (Intersil Prism2/2.5/3)", 1179 .set_key = wpa_driver_hostap_set_key, 1180 .hapd_init = hostap_init, 1181 .hapd_deinit = hostap_driver_deinit, 1182 .set_ieee8021x = hostap_set_ieee8021x, 1183 .set_privacy = hostap_set_privacy, 1184 .get_seqnum = hostap_get_seqnum, 1185 .flush = hostap_flush, 1186 .set_generic_elem = hostap_set_generic_elem, 1187 .read_sta_data = hostap_read_sta_data, 1188 .hapd_send_eapol = hostap_send_eapol, 1189 .sta_set_flags = hostap_sta_set_flags, 1190 .sta_deauth = hostap_sta_deauth, 1191 .sta_disassoc = hostap_sta_disassoc, 1192 .sta_remove = hostap_sta_remove, 1193 .hapd_set_ssid = hostap_set_ssid, 1194 .send_mlme = hostap_send_mlme, 1195 .sta_add = hostap_sta_add, 1196 .get_inact_sec = hostap_get_inact_sec, 1197 .sta_clear_stats = hostap_sta_clear_stats, 1198 .get_hw_feature_data = hostap_get_hw_feature_data, 1199 .set_ap_wps_ie = hostap_set_ap_wps_ie, 1200 .set_freq = hostap_set_freq, 1201 .poll_client = wpa_driver_hostap_poll_client, 1202 }; 1203
