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