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, 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 2 is reserved for indicating ACKed frame (TX 169 * callbacks), and version 1 for indicating failed frame (no ACK, TX 170 * callbacks) */ 171 if (ver == 1 || ver == 2) { 172 handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0); 173 return; 174 } else if (ver != 0) { 175 printf("unknown protocol version %d\n", ver); 176 return; 177 } 178 179 switch (type) { 180 case WLAN_FC_TYPE_MGMT: 181 os_memset(&event, 0, sizeof(event)); 182 event.rx_mgmt.frame = buf; 183 event.rx_mgmt.frame_len = data_len; 184 wpa_supplicant_event(drv->hapd, EVENT_RX_MGMT, &event); 185 break; 186 case WLAN_FC_TYPE_CTRL: 187 wpa_printf(MSG_DEBUG, "CTRL"); 188 break; 189 case WLAN_FC_TYPE_DATA: 190 wpa_printf(MSG_DEBUG, "DATA"); 191 handle_data(drv, buf, data_len, stype); 192 break; 193 default: 194 wpa_printf(MSG_DEBUG, "unknown frame type %d", type); 195 break; 196 } 197 } 198 199 200 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx) 201 { 202 struct hostap_driver_data *drv = eloop_ctx; 203 int len; 204 unsigned char buf[3000]; 205 206 len = recv(sock, buf, sizeof(buf), 0); 207 if (len < 0) { 208 wpa_printf(MSG_ERROR, "recv: %s", strerror(errno)); 209 return; 210 } 211 212 handle_frame(drv, buf, len); 213 } 214 215 216 static int hostap_init_sockets(struct hostap_driver_data *drv, u8 *own_addr) 217 { 218 struct ifreq ifr; 219 struct sockaddr_ll addr; 220 221 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); 222 if (drv->sock < 0) { 223 wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s", 224 strerror(errno)); 225 return -1; 226 } 227 228 if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) { 229 wpa_printf(MSG_ERROR, "Could not register read socket"); 230 return -1; 231 } 232 233 memset(&ifr, 0, sizeof(ifr)); 234 if (os_snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", 235 drv->iface) >= (int) sizeof(ifr.ifr_name)) { 236 wpa_printf(MSG_ERROR, "hostap: AP interface name truncated"); 237 return -1; 238 } 239 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) { 240 wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s", 241 strerror(errno)); 242 return -1; 243 } 244 245 if (hostap_set_iface_flags(drv, 1)) { 246 return -1; 247 } 248 249 memset(&addr, 0, sizeof(addr)); 250 addr.sll_family = AF_PACKET; 251 addr.sll_ifindex = ifr.ifr_ifindex; 252 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d", 253 addr.sll_ifindex); 254 255 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 256 wpa_printf(MSG_ERROR, "bind: %s", strerror(errno)); 257 return -1; 258 } 259 260 return linux_get_ifhwaddr(drv->sock, drv->iface, own_addr); 261 } 262 263 264 static int hostap_send_mlme(void *priv, const u8 *msg, size_t len, int noack, 265 unsigned int freq, 266 const u16 *csa_offs, size_t csa_offs_len, 267 int no_encrypt, unsigned int wait) 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, 0, NULL, 0, 0, 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 os_free(hdr); 323 324 return res; 325 } 326 327 328 static int hostap_sta_set_flags(void *priv, const u8 *addr, 329 unsigned int total_flags, unsigned int flags_or, 330 unsigned int flags_and) 331 { 332 struct hostap_driver_data *drv = priv; 333 struct prism2_hostapd_param param; 334 335 if (flags_or & WPA_STA_AUTHORIZED) 336 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */ 337 if (!(flags_and & WPA_STA_AUTHORIZED)) 338 flags_and = ~BIT(5); 339 else 340 flags_and = ~0; 341 memset(¶m, 0, sizeof(param)); 342 param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA; 343 memcpy(param.sta_addr, addr, ETH_ALEN); 344 param.u.set_flags_sta.flags_or = flags_or; 345 param.u.set_flags_sta.flags_and = flags_and; 346 return hostapd_ioctl(drv, ¶m, sizeof(param)); 347 } 348 349 350 static int hostap_set_iface_flags(void *priv, int dev_up) 351 { 352 struct hostap_driver_data *drv = priv; 353 struct ifreq ifr; 354 char ifname[IFNAMSIZ]; 355 356 if (os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface) >= IFNAMSIZ) { 357 wpa_printf(MSG_ERROR, "hostap: AP interface name truncated"); 358 return -1; 359 } 360 if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0) 361 return -1; 362 363 if (dev_up) { 364 memset(&ifr, 0, sizeof(ifr)); 365 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); 366 ifr.ifr_mtu = HOSTAPD_MTU; 367 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) { 368 wpa_printf(MSG_INFO, 369 "Setting MTU failed - trying to survive with current value: ioctl[SIOCSIFMTU]: %s", 370 strerror(errno)); 371 } 372 } 373 374 return 0; 375 } 376 377 378 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param, 379 int len) 380 { 381 struct hostap_driver_data *drv = priv; 382 struct iwreq iwr; 383 384 memset(&iwr, 0, sizeof(iwr)); 385 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 386 iwr.u.data.pointer = (caddr_t) param; 387 iwr.u.data.length = len; 388 389 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) { 390 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_HOSTAPD]: %s", 391 strerror(errno)); 392 return -1; 393 } 394 395 return 0; 396 } 397 398 399 static int wpa_driver_hostap_set_key(void *priv, 400 struct wpa_driver_set_key_params *params) 401 { 402 struct hostap_driver_data *drv = priv; 403 struct prism2_hostapd_param *param; 404 u8 *buf; 405 size_t blen; 406 int ret = 0; 407 enum wpa_alg alg = params->alg; 408 const u8 *addr = params->addr; 409 int key_idx = params->key_idx; 410 int set_tx = params->set_tx; 411 const u8 *key = params->key; 412 size_t key_len = params->key_len; 413 414 blen = sizeof(*param) + key_len; 415 buf = os_zalloc(blen); 416 if (buf == NULL) 417 return -1; 418 419 param = (struct prism2_hostapd_param *) buf; 420 param->cmd = PRISM2_SET_ENCRYPTION; 421 if (addr == NULL) 422 memset(param->sta_addr, 0xff, ETH_ALEN); 423 else 424 memcpy(param->sta_addr, addr, ETH_ALEN); 425 switch (alg) { 426 case WPA_ALG_NONE: 427 os_strlcpy((char *) param->u.crypt.alg, "NONE", 428 HOSTAP_CRYPT_ALG_NAME_LEN); 429 break; 430 case WPA_ALG_WEP: 431 os_strlcpy((char *) param->u.crypt.alg, "WEP", 432 HOSTAP_CRYPT_ALG_NAME_LEN); 433 break; 434 case WPA_ALG_TKIP: 435 os_strlcpy((char *) param->u.crypt.alg, "TKIP", 436 HOSTAP_CRYPT_ALG_NAME_LEN); 437 break; 438 case WPA_ALG_CCMP: 439 os_strlcpy((char *) param->u.crypt.alg, "CCMP", 440 HOSTAP_CRYPT_ALG_NAME_LEN); 441 break; 442 default: 443 os_free(buf); 444 return -1; 445 } 446 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0; 447 param->u.crypt.idx = key_idx; 448 param->u.crypt.key_len = key_len; 449 memcpy((u8 *) (param + 1), key, key_len); 450 451 if (hostapd_ioctl(drv, param, blen)) { 452 printf("Failed to set encryption.\n"); 453 ret = -1; 454 } 455 free(buf); 456 457 return ret; 458 } 459 460 461 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr, 462 int idx, u8 *seq) 463 { 464 struct hostap_driver_data *drv = priv; 465 struct prism2_hostapd_param *param; 466 u8 *buf; 467 size_t blen; 468 int ret = 0; 469 470 blen = sizeof(*param) + 32; 471 buf = os_zalloc(blen); 472 if (buf == NULL) 473 return -1; 474 475 param = (struct prism2_hostapd_param *) buf; 476 param->cmd = PRISM2_GET_ENCRYPTION; 477 if (addr == NULL) 478 os_memset(param->sta_addr, 0xff, ETH_ALEN); 479 else 480 os_memcpy(param->sta_addr, addr, ETH_ALEN); 481 param->u.crypt.idx = idx; 482 483 if (hostapd_ioctl(drv, param, blen)) { 484 printf("Failed to get encryption.\n"); 485 ret = -1; 486 } else { 487 os_memcpy(seq, param->u.crypt.seq, 8); 488 } 489 os_free(buf); 490 491 return ret; 492 } 493 494 495 static int hostap_ioctl_prism2param(void *priv, int param, int value) 496 { 497 struct hostap_driver_data *drv = priv; 498 struct iwreq iwr; 499 int *i; 500 501 memset(&iwr, 0, sizeof(iwr)); 502 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 503 i = (int *) iwr.u.name; 504 *i++ = param; 505 *i++ = value; 506 507 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) { 508 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_PRISM2_PARAM]: %s", 509 strerror(errno)); 510 return -1; 511 } 512 513 return 0; 514 } 515 516 517 static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params) 518 { 519 struct hostap_driver_data *drv = priv; 520 int enabled = params->enabled; 521 522 /* enable kernel driver support for IEEE 802.1X */ 523 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) { 524 printf("Could not setup IEEE 802.1X support in kernel driver." 525 "\n"); 526 return -1; 527 } 528 529 if (!enabled) 530 return 0; 531 532 /* use host driver implementation of encryption to allow 533 * individual keys and passing plaintext EAPOL frames */ 534 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) || 535 hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) { 536 printf("Could not setup host-based encryption in kernel " 537 "driver.\n"); 538 return -1; 539 } 540 541 return 0; 542 } 543 544 545 static int hostap_set_privacy(void *priv, int enabled) 546 { 547 struct hostap_drvier_data *drv = priv; 548 549 return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED, 550 enabled); 551 } 552 553 554 static int hostap_set_ssid(void *priv, const u8 *buf, int len) 555 { 556 struct hostap_driver_data *drv = priv; 557 struct iwreq iwr; 558 559 memset(&iwr, 0, sizeof(iwr)); 560 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 561 iwr.u.essid.flags = 1; /* SSID active */ 562 iwr.u.essid.pointer = (caddr_t) buf; 563 iwr.u.essid.length = len + 1; 564 565 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) { 566 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID,len=%d]: %s", 567 len, strerror(errno)); 568 return -1; 569 } 570 571 return 0; 572 } 573 574 575 static int hostap_flush(void *priv) 576 { 577 struct hostap_driver_data *drv = priv; 578 struct prism2_hostapd_param param; 579 580 memset(¶m, 0, sizeof(param)); 581 param.cmd = PRISM2_HOSTAPD_FLUSH; 582 return hostapd_ioctl(drv, ¶m, sizeof(param)); 583 } 584 585 586 static int hostap_read_sta_data(void *priv, 587 struct hostap_sta_driver_data *data, 588 const u8 *addr) 589 { 590 struct hostap_driver_data *drv = priv; 591 char buf[1024], line[128], *pos; 592 FILE *f; 593 unsigned long val; 594 595 memset(data, 0, sizeof(*data)); 596 snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR, 597 drv->iface, MAC2STR(addr)); 598 599 f = fopen(buf, "r"); 600 if (!f) 601 return -1; 602 /* Need to read proc file with in one piece, so use large enough 603 * buffer. */ 604 setbuffer(f, buf, sizeof(buf)); 605 606 while (fgets(line, sizeof(line), f)) { 607 pos = strchr(line, '='); 608 if (!pos) 609 continue; 610 *pos++ = '\0'; 611 val = strtoul(pos, NULL, 10); 612 if (strcmp(line, "rx_packets") == 0) 613 data->rx_packets = val; 614 else if (strcmp(line, "tx_packets") == 0) 615 data->tx_packets = val; 616 else if (strcmp(line, "rx_bytes") == 0) 617 data->rx_bytes = val; 618 else if (strcmp(line, "tx_bytes") == 0) 619 data->tx_bytes = val; 620 } 621 622 fclose(f); 623 624 return 0; 625 } 626 627 628 static int hostap_sta_add(void *priv, struct hostapd_sta_add_params *params) 629 { 630 struct hostap_driver_data *drv = priv; 631 struct prism2_hostapd_param param; 632 int tx_supp_rates = 0; 633 size_t i; 634 635 #define WLAN_RATE_1M BIT(0) 636 #define WLAN_RATE_2M BIT(1) 637 #define WLAN_RATE_5M5 BIT(2) 638 #define WLAN_RATE_11M BIT(3) 639 640 for (i = 0; i < params->supp_rates_len; i++) { 641 if ((params->supp_rates[i] & 0x7f) == 2) 642 tx_supp_rates |= WLAN_RATE_1M; 643 if ((params->supp_rates[i] & 0x7f) == 4) 644 tx_supp_rates |= WLAN_RATE_2M; 645 if ((params->supp_rates[i] & 0x7f) == 11) 646 tx_supp_rates |= WLAN_RATE_5M5; 647 if ((params->supp_rates[i] & 0x7f) == 22) 648 tx_supp_rates |= WLAN_RATE_11M; 649 } 650 651 memset(¶m, 0, sizeof(param)); 652 param.cmd = PRISM2_HOSTAPD_ADD_STA; 653 memcpy(param.sta_addr, params->addr, ETH_ALEN); 654 param.u.add_sta.aid = params->aid; 655 param.u.add_sta.capability = params->capability; 656 param.u.add_sta.tx_supp_rates = tx_supp_rates; 657 return hostapd_ioctl(drv, ¶m, sizeof(param)); 658 } 659 660 661 static int hostap_sta_remove(void *priv, const u8 *addr) 662 { 663 struct hostap_driver_data *drv = priv; 664 struct prism2_hostapd_param param; 665 666 hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED); 667 668 memset(¶m, 0, sizeof(param)); 669 param.cmd = PRISM2_HOSTAPD_REMOVE_STA; 670 memcpy(param.sta_addr, addr, ETH_ALEN); 671 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 672 printf("Could not remove station from kernel driver.\n"); 673 return -1; 674 } 675 return 0; 676 } 677 678 679 static int hostap_get_inact_sec(void *priv, const u8 *addr) 680 { 681 struct hostap_driver_data *drv = priv; 682 struct prism2_hostapd_param param; 683 684 memset(¶m, 0, sizeof(param)); 685 param.cmd = PRISM2_HOSTAPD_GET_INFO_STA; 686 memcpy(param.sta_addr, addr, ETH_ALEN); 687 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 688 return -1; 689 } 690 691 return param.u.get_info_sta.inactive_sec; 692 } 693 694 695 static int hostap_sta_clear_stats(void *priv, const u8 *addr) 696 { 697 struct hostap_driver_data *drv = priv; 698 struct prism2_hostapd_param param; 699 700 memset(¶m, 0, sizeof(param)); 701 param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS; 702 memcpy(param.sta_addr, addr, ETH_ALEN); 703 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 704 return -1; 705 } 706 707 return 0; 708 } 709 710 711 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv) 712 { 713 struct prism2_hostapd_param *param; 714 int res; 715 size_t blen, elem_len; 716 717 elem_len = drv->generic_ie_len + drv->wps_ie_len; 718 blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len; 719 if (blen < sizeof(*param)) 720 blen = sizeof(*param); 721 722 param = os_zalloc(blen); 723 if (param == NULL) 724 return -1; 725 726 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT; 727 param->u.generic_elem.len = elem_len; 728 if (drv->generic_ie) { 729 os_memcpy(param->u.generic_elem.data, drv->generic_ie, 730 drv->generic_ie_len); 731 } 732 if (drv->wps_ie) { 733 os_memcpy(¶m->u.generic_elem.data[drv->generic_ie_len], 734 drv->wps_ie, drv->wps_ie_len); 735 } 736 wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE", 737 param->u.generic_elem.data, elem_len); 738 res = hostapd_ioctl(drv, param, blen); 739 740 os_free(param); 741 742 return res; 743 } 744 745 746 static int hostap_set_generic_elem(void *priv, 747 const u8 *elem, size_t elem_len) 748 { 749 struct hostap_driver_data *drv = priv; 750 751 os_free(drv->generic_ie); 752 drv->generic_ie = NULL; 753 drv->generic_ie_len = 0; 754 if (elem) { 755 drv->generic_ie = os_memdup(elem, elem_len); 756 if (drv->generic_ie == NULL) 757 return -1; 758 drv->generic_ie_len = elem_len; 759 } 760 761 return hostapd_ioctl_set_generic_elem(drv); 762 } 763 764 765 static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon, 766 const struct wpabuf *proberesp, 767 const struct wpabuf *assocresp) 768 { 769 struct hostap_driver_data *drv = priv; 770 771 /* 772 * Host AP driver supports only one set of extra IEs, so we need to 773 * use the Probe Response IEs also for Beacon frames since they include 774 * more information. 775 */ 776 777 os_free(drv->wps_ie); 778 drv->wps_ie = NULL; 779 drv->wps_ie_len = 0; 780 if (proberesp) { 781 drv->wps_ie = os_memdup(wpabuf_head(proberesp), 782 wpabuf_len(proberesp)); 783 if (drv->wps_ie == NULL) 784 return -1; 785 drv->wps_ie_len = wpabuf_len(proberesp); 786 } 787 788 return hostapd_ioctl_set_generic_elem(drv); 789 } 790 791 792 static void 793 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv, 794 char *custom) 795 { 796 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom); 797 798 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) { 799 char *pos; 800 u8 addr[ETH_ALEN]; 801 pos = strstr(custom, "addr="); 802 if (pos == NULL) { 803 wpa_printf(MSG_DEBUG, 804 "MLME-MICHAELMICFAILURE.indication " 805 "without sender address ignored"); 806 return; 807 } 808 pos += 5; 809 if (hwaddr_aton(pos, addr) == 0) { 810 union wpa_event_data data; 811 os_memset(&data, 0, sizeof(data)); 812 data.michael_mic_failure.unicast = 1; 813 data.michael_mic_failure.src = addr; 814 wpa_supplicant_event(drv->hapd, 815 EVENT_MICHAEL_MIC_FAILURE, &data); 816 } else { 817 wpa_printf(MSG_DEBUG, 818 "MLME-MICHAELMICFAILURE.indication " 819 "with invalid MAC address"); 820 } 821 } 822 } 823 824 825 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv, 826 char *data, unsigned int len) 827 { 828 struct iw_event iwe_buf, *iwe = &iwe_buf; 829 char *pos, *end, *custom, *buf; 830 831 pos = data; 832 end = data + len; 833 834 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) { 835 /* Event data may be unaligned, so make a local, aligned copy 836 * before processing. */ 837 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); 838 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d", 839 iwe->cmd, iwe->len); 840 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos) 841 return; 842 843 custom = pos + IW_EV_POINT_LEN; 844 if (drv->we_version > 18 && 845 (iwe->cmd == IWEVMICHAELMICFAILURE || 846 iwe->cmd == IWEVCUSTOM)) { 847 /* WE-19 removed the pointer from struct iw_point */ 848 char *dpos = (char *) &iwe_buf.u.data.length; 849 int dlen = dpos - (char *) &iwe_buf; 850 memcpy(dpos, pos + IW_EV_LCP_LEN, 851 sizeof(struct iw_event) - dlen); 852 } else { 853 memcpy(&iwe_buf, pos, sizeof(struct iw_event)); 854 custom += IW_EV_POINT_OFF; 855 } 856 857 switch (iwe->cmd) { 858 case IWEVCUSTOM: 859 if (iwe->u.data.length > end - custom) 860 return; 861 buf = malloc(iwe->u.data.length + 1); 862 if (buf == NULL) 863 return; 864 memcpy(buf, custom, iwe->u.data.length); 865 buf[iwe->u.data.length] = '\0'; 866 hostapd_wireless_event_wireless_custom(drv, buf); 867 free(buf); 868 break; 869 } 870 871 pos += iwe->len; 872 } 873 } 874 875 876 static void hostapd_wireless_event_rtm_newlink(void *ctx, 877 struct ifinfomsg *ifi, 878 u8 *buf, size_t len) 879 { 880 struct hostap_driver_data *drv = ctx; 881 int attrlen, rta_len; 882 struct rtattr *attr; 883 884 /* TODO: use ifi->ifi_index to filter out wireless events from other 885 * interfaces */ 886 887 attrlen = len; 888 attr = (struct rtattr *) buf; 889 890 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 891 while (RTA_OK(attr, attrlen)) { 892 if (attr->rta_type == IFLA_WIRELESS) { 893 hostapd_wireless_event_wireless( 894 drv, ((char *) attr) + rta_len, 895 attr->rta_len - rta_len); 896 } 897 attr = RTA_NEXT(attr, attrlen); 898 } 899 } 900 901 902 static int hostap_get_we_version(struct hostap_driver_data *drv) 903 { 904 struct iw_range *range; 905 struct iwreq iwr; 906 int minlen; 907 size_t buflen; 908 909 drv->we_version = 0; 910 911 /* 912 * Use larger buffer than struct iw_range in order to allow the 913 * structure to grow in the future. 914 */ 915 buflen = sizeof(struct iw_range) + 500; 916 range = os_zalloc(buflen); 917 if (range == NULL) 918 return -1; 919 920 memset(&iwr, 0, sizeof(iwr)); 921 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 922 iwr.u.data.pointer = (caddr_t) range; 923 iwr.u.data.length = buflen; 924 925 minlen = ((char *) &range->enc_capa) - (char *) range + 926 sizeof(range->enc_capa); 927 928 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) { 929 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s", 930 strerror(errno)); 931 os_free(range); 932 return -1; 933 } else if (iwr.u.data.length >= minlen && 934 range->we_version_compiled >= 18) { 935 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d " 936 "WE(source)=%d enc_capa=0x%x", 937 range->we_version_compiled, 938 range->we_version_source, 939 range->enc_capa); 940 drv->we_version = range->we_version_compiled; 941 } 942 943 free(range); 944 return 0; 945 } 946 947 948 static int hostap_wireless_event_init(struct hostap_driver_data *drv) 949 { 950 struct netlink_config *cfg; 951 952 hostap_get_we_version(drv); 953 954 cfg = os_zalloc(sizeof(*cfg)); 955 if (cfg == NULL) 956 return -1; 957 cfg->ctx = drv; 958 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink; 959 drv->netlink = netlink_init(cfg); 960 if (drv->netlink == NULL) { 961 os_free(cfg); 962 return -1; 963 } 964 965 return 0; 966 } 967 968 969 static void * hostap_init(struct hostapd_data *hapd, 970 struct wpa_init_params *params) 971 { 972 struct hostap_driver_data *drv; 973 974 drv = os_zalloc(sizeof(struct hostap_driver_data)); 975 if (drv == NULL) { 976 printf("Could not allocate memory for hostapd driver data\n"); 977 return NULL; 978 } 979 980 drv->hapd = hapd; 981 drv->ioctl_sock = drv->sock = -1; 982 memcpy(drv->iface, params->ifname, sizeof(drv->iface)); 983 984 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); 985 if (drv->ioctl_sock < 0) { 986 wpa_printf(MSG_ERROR, "socket[PF_INET,SOCK_DGRAM]: %s", 987 strerror(errno)); 988 os_free(drv); 989 return NULL; 990 } 991 992 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) { 993 wpa_printf(MSG_ERROR, 994 "Could not enable hostapd mode for interface %s", 995 drv->iface); 996 close(drv->ioctl_sock); 997 os_free(drv); 998 return NULL; 999 } 1000 1001 if (hostap_init_sockets(drv, params->own_addr) || 1002 hostap_wireless_event_init(drv)) { 1003 close(drv->ioctl_sock); 1004 os_free(drv); 1005 return NULL; 1006 } 1007 1008 return drv; 1009 } 1010 1011 1012 static void hostap_driver_deinit(void *priv) 1013 { 1014 struct hostap_driver_data *drv = priv; 1015 1016 netlink_deinit(drv->netlink); 1017 (void) hostap_set_iface_flags(drv, 0); 1018 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0); 1019 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0); 1020 1021 if (drv->ioctl_sock >= 0) 1022 close(drv->ioctl_sock); 1023 1024 if (drv->sock >= 0) 1025 close(drv->sock); 1026 1027 os_free(drv->generic_ie); 1028 os_free(drv->wps_ie); 1029 1030 free(drv); 1031 } 1032 1033 1034 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr, 1035 u16 reason) 1036 { 1037 struct hostap_driver_data *drv = priv; 1038 struct ieee80211_mgmt mgmt; 1039 1040 if (is_broadcast_ether_addr(addr)) { 1041 /* 1042 * New Prism2.5/3 STA firmware versions seem to have issues 1043 * with this broadcast deauth frame. This gets the firmware in 1044 * odd state where nothing works correctly, so let's skip 1045 * sending this for the hostap driver. 1046 */ 1047 return 0; 1048 } 1049 1050 memset(&mgmt, 0, sizeof(mgmt)); 1051 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1052 WLAN_FC_STYPE_DEAUTH); 1053 memcpy(mgmt.da, addr, ETH_ALEN); 1054 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1055 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1056 mgmt.u.deauth.reason_code = host_to_le16(reason); 1057 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1058 sizeof(mgmt.u.deauth), 0, 0, NULL, 0, 0, 0); 1059 } 1060 1061 1062 static int hostap_set_freq(void *priv, struct hostapd_freq_params *freq) 1063 { 1064 struct hostap_driver_data *drv = priv; 1065 struct iwreq iwr; 1066 1067 os_memset(&iwr, 0, sizeof(iwr)); 1068 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 1069 iwr.u.freq.m = freq->channel; 1070 iwr.u.freq.e = 0; 1071 1072 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) { 1073 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s", 1074 strerror(errno)); 1075 return -1; 1076 } 1077 1078 return 0; 1079 } 1080 1081 1082 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr, 1083 u16 reason) 1084 { 1085 struct hostap_driver_data *drv = priv; 1086 struct ieee80211_mgmt mgmt; 1087 1088 memset(&mgmt, 0, sizeof(mgmt)); 1089 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1090 WLAN_FC_STYPE_DISASSOC); 1091 memcpy(mgmt.da, addr, ETH_ALEN); 1092 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1093 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1094 mgmt.u.disassoc.reason_code = host_to_le16(reason); 1095 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1096 sizeof(mgmt.u.disassoc), 0, 0, NULL, 0, 0, 0); 1097 } 1098 1099 1100 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv, 1101 u16 *num_modes, 1102 u16 *flags, u8 *dfs) 1103 { 1104 struct hostapd_hw_modes *mode; 1105 int i, clen, rlen; 1106 const short chan2freq[14] = { 1107 2412, 2417, 2422, 2427, 2432, 2437, 2442, 1108 2447, 2452, 2457, 2462, 2467, 2472, 2484 1109 }; 1110 1111 mode = os_zalloc(sizeof(struct hostapd_hw_modes)); 1112 if (mode == NULL) 1113 return NULL; 1114 1115 *num_modes = 1; 1116 *flags = 0; 1117 *dfs = 0; 1118 1119 mode->mode = HOSTAPD_MODE_IEEE80211B; 1120 mode->num_channels = 14; 1121 mode->num_rates = 4; 1122 1123 clen = mode->num_channels * sizeof(struct hostapd_channel_data); 1124 rlen = mode->num_rates * sizeof(int); 1125 1126 mode->channels = os_zalloc(clen); 1127 mode->rates = os_zalloc(rlen); 1128 if (mode->channels == NULL || mode->rates == NULL) { 1129 os_free(mode->channels); 1130 os_free(mode->rates); 1131 os_free(mode); 1132 return NULL; 1133 } 1134 1135 for (i = 0; i < 14; i++) { 1136 mode->channels[i].chan = i + 1; 1137 mode->channels[i].freq = chan2freq[i]; 1138 mode->channels[i].allowed_bw = HOSTAPD_CHAN_WIDTH_20; 1139 /* TODO: Get allowed channel list from the driver */ 1140 if (i >= 11) 1141 mode->channels[i].flag = HOSTAPD_CHAN_DISABLED; 1142 } 1143 1144 mode->rates[0] = 10; 1145 mode->rates[1] = 20; 1146 mode->rates[2] = 55; 1147 mode->rates[3] = 110; 1148 1149 return mode; 1150 } 1151 1152 1153 static void wpa_driver_hostap_poll_client(void *priv, const u8 *own_addr, 1154 const u8 *addr, int qos) 1155 { 1156 struct ieee80211_hdr hdr; 1157 1158 os_memset(&hdr, 0, sizeof(hdr)); 1159 1160 /* 1161 * WLAN_FC_STYPE_NULLFUNC would be more appropriate, 1162 * but it is apparently not retried so TX Exc events 1163 * are not received for it. 1164 * This is the reason the driver overrides the default 1165 * handling. 1166 */ 1167 hdr.frame_control = IEEE80211_FC(WLAN_FC_TYPE_DATA, 1168 WLAN_FC_STYPE_DATA); 1169 1170 hdr.frame_control |= 1171 host_to_le16(WLAN_FC_FROMDS); 1172 os_memcpy(hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN); 1173 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 1174 os_memcpy(hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 1175 1176 hostap_send_mlme(priv, (u8 *)&hdr, sizeof(hdr), 0, 0, NULL, 0, 0, 0); 1177 } 1178 1179 1180 const struct wpa_driver_ops wpa_driver_hostap_ops = { 1181 .name = "hostap", 1182 .desc = "Host AP driver (Intersil Prism2/2.5/3)", 1183 .set_key = wpa_driver_hostap_set_key, 1184 .hapd_init = hostap_init, 1185 .hapd_deinit = hostap_driver_deinit, 1186 .set_ieee8021x = hostap_set_ieee8021x, 1187 .set_privacy = hostap_set_privacy, 1188 .get_seqnum = hostap_get_seqnum, 1189 .flush = hostap_flush, 1190 .set_generic_elem = hostap_set_generic_elem, 1191 .read_sta_data = hostap_read_sta_data, 1192 .hapd_send_eapol = hostap_send_eapol, 1193 .sta_set_flags = hostap_sta_set_flags, 1194 .sta_deauth = hostap_sta_deauth, 1195 .sta_disassoc = hostap_sta_disassoc, 1196 .sta_remove = hostap_sta_remove, 1197 .hapd_set_ssid = hostap_set_ssid, 1198 .send_mlme = hostap_send_mlme, 1199 .sta_add = hostap_sta_add, 1200 .get_inact_sec = hostap_get_inact_sec, 1201 .sta_clear_stats = hostap_sta_clear_stats, 1202 .get_hw_feature_data = hostap_get_hw_feature_data, 1203 .set_ap_wps_ie = hostap_set_ap_wps_ie, 1204 .set_freq = hostap_set_freq, 1205 .poll_client = wpa_driver_hostap_poll_client, 1206 }; 1207