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 { 268 struct hostap_driver_data *drv = priv; 269 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg; 270 int res; 271 272 /* Request TX callback */ 273 hdr->frame_control |= host_to_le16(BIT(1)); 274 res = send(drv->sock, msg, len, 0); 275 hdr->frame_control &= ~host_to_le16(BIT(1)); 276 277 return res; 278 } 279 280 281 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data, 282 size_t data_len, int encrypt, const u8 *own_addr, 283 u32 flags) 284 { 285 struct hostap_driver_data *drv = priv; 286 struct ieee80211_hdr *hdr; 287 size_t len; 288 u8 *pos; 289 int res; 290 291 len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len; 292 hdr = os_zalloc(len); 293 if (hdr == NULL) { 294 printf("malloc() failed for hostapd_send_data(len=%lu)\n", 295 (unsigned long) len); 296 return -1; 297 } 298 299 hdr->frame_control = 300 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA); 301 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS); 302 if (encrypt) 303 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP); 304 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN); 305 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 306 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 307 308 pos = (u8 *) (hdr + 1); 309 memcpy(pos, rfc1042_header, sizeof(rfc1042_header)); 310 pos += sizeof(rfc1042_header); 311 *((u16 *) pos) = htons(ETH_P_PAE); 312 pos += 2; 313 memcpy(pos, data, data_len); 314 315 res = hostap_send_mlme(drv, (u8 *) hdr, len, 0, 0, NULL, 0); 316 if (res < 0) { 317 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - " 318 "failed: %d (%s)", 319 (unsigned long) len, errno, strerror(errno)); 320 } 321 os_free(hdr); 322 323 return res; 324 } 325 326 327 static int hostap_sta_set_flags(void *priv, const u8 *addr, 328 unsigned int total_flags, unsigned int flags_or, 329 unsigned 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 if (os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface) >= IFNAMSIZ) { 356 wpa_printf(MSG_ERROR, "hostap: AP interface name truncated"); 357 return -1; 358 } 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_memdup(elem, elem_len); 752 if (drv->generic_ie == NULL) 753 return -1; 754 drv->generic_ie_len = elem_len; 755 } 756 757 return hostapd_ioctl_set_generic_elem(drv); 758 } 759 760 761 static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon, 762 const struct wpabuf *proberesp, 763 const struct wpabuf *assocresp) 764 { 765 struct hostap_driver_data *drv = priv; 766 767 /* 768 * Host AP driver supports only one set of extra IEs, so we need to 769 * use the Probe Response IEs also for Beacon frames since they include 770 * more information. 771 */ 772 773 os_free(drv->wps_ie); 774 drv->wps_ie = NULL; 775 drv->wps_ie_len = 0; 776 if (proberesp) { 777 drv->wps_ie = os_memdup(wpabuf_head(proberesp), 778 wpabuf_len(proberesp)); 779 if (drv->wps_ie == NULL) 780 return -1; 781 drv->wps_ie_len = wpabuf_len(proberesp); 782 } 783 784 return hostapd_ioctl_set_generic_elem(drv); 785 } 786 787 788 static void 789 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv, 790 char *custom) 791 { 792 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom); 793 794 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) { 795 char *pos; 796 u8 addr[ETH_ALEN]; 797 pos = strstr(custom, "addr="); 798 if (pos == NULL) { 799 wpa_printf(MSG_DEBUG, 800 "MLME-MICHAELMICFAILURE.indication " 801 "without sender address ignored"); 802 return; 803 } 804 pos += 5; 805 if (hwaddr_aton(pos, addr) == 0) { 806 union wpa_event_data data; 807 os_memset(&data, 0, sizeof(data)); 808 data.michael_mic_failure.unicast = 1; 809 data.michael_mic_failure.src = addr; 810 wpa_supplicant_event(drv->hapd, 811 EVENT_MICHAEL_MIC_FAILURE, &data); 812 } else { 813 wpa_printf(MSG_DEBUG, 814 "MLME-MICHAELMICFAILURE.indication " 815 "with invalid MAC address"); 816 } 817 } 818 } 819 820 821 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv, 822 char *data, unsigned int len) 823 { 824 struct iw_event iwe_buf, *iwe = &iwe_buf; 825 char *pos, *end, *custom, *buf; 826 827 pos = data; 828 end = data + len; 829 830 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) { 831 /* Event data may be unaligned, so make a local, aligned copy 832 * before processing. */ 833 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); 834 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d", 835 iwe->cmd, iwe->len); 836 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos) 837 return; 838 839 custom = pos + IW_EV_POINT_LEN; 840 if (drv->we_version > 18 && 841 (iwe->cmd == IWEVMICHAELMICFAILURE || 842 iwe->cmd == IWEVCUSTOM)) { 843 /* WE-19 removed the pointer from struct iw_point */ 844 char *dpos = (char *) &iwe_buf.u.data.length; 845 int dlen = dpos - (char *) &iwe_buf; 846 memcpy(dpos, pos + IW_EV_LCP_LEN, 847 sizeof(struct iw_event) - dlen); 848 } else { 849 memcpy(&iwe_buf, pos, sizeof(struct iw_event)); 850 custom += IW_EV_POINT_OFF; 851 } 852 853 switch (iwe->cmd) { 854 case IWEVCUSTOM: 855 if (iwe->u.data.length > end - custom) 856 return; 857 buf = malloc(iwe->u.data.length + 1); 858 if (buf == NULL) 859 return; 860 memcpy(buf, custom, iwe->u.data.length); 861 buf[iwe->u.data.length] = '\0'; 862 hostapd_wireless_event_wireless_custom(drv, buf); 863 free(buf); 864 break; 865 } 866 867 pos += iwe->len; 868 } 869 } 870 871 872 static void hostapd_wireless_event_rtm_newlink(void *ctx, 873 struct ifinfomsg *ifi, 874 u8 *buf, size_t len) 875 { 876 struct hostap_driver_data *drv = ctx; 877 int attrlen, rta_len; 878 struct rtattr *attr; 879 880 /* TODO: use ifi->ifi_index to filter out wireless events from other 881 * interfaces */ 882 883 attrlen = len; 884 attr = (struct rtattr *) buf; 885 886 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 887 while (RTA_OK(attr, attrlen)) { 888 if (attr->rta_type == IFLA_WIRELESS) { 889 hostapd_wireless_event_wireless( 890 drv, ((char *) attr) + rta_len, 891 attr->rta_len - rta_len); 892 } 893 attr = RTA_NEXT(attr, attrlen); 894 } 895 } 896 897 898 static int hostap_get_we_version(struct hostap_driver_data *drv) 899 { 900 struct iw_range *range; 901 struct iwreq iwr; 902 int minlen; 903 size_t buflen; 904 905 drv->we_version = 0; 906 907 /* 908 * Use larger buffer than struct iw_range in order to allow the 909 * structure to grow in the future. 910 */ 911 buflen = sizeof(struct iw_range) + 500; 912 range = os_zalloc(buflen); 913 if (range == NULL) 914 return -1; 915 916 memset(&iwr, 0, sizeof(iwr)); 917 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 918 iwr.u.data.pointer = (caddr_t) range; 919 iwr.u.data.length = buflen; 920 921 minlen = ((char *) &range->enc_capa) - (char *) range + 922 sizeof(range->enc_capa); 923 924 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) { 925 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s", 926 strerror(errno)); 927 os_free(range); 928 return -1; 929 } else if (iwr.u.data.length >= minlen && 930 range->we_version_compiled >= 18) { 931 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d " 932 "WE(source)=%d enc_capa=0x%x", 933 range->we_version_compiled, 934 range->we_version_source, 935 range->enc_capa); 936 drv->we_version = range->we_version_compiled; 937 } 938 939 free(range); 940 return 0; 941 } 942 943 944 static int hostap_wireless_event_init(struct hostap_driver_data *drv) 945 { 946 struct netlink_config *cfg; 947 948 hostap_get_we_version(drv); 949 950 cfg = os_zalloc(sizeof(*cfg)); 951 if (cfg == NULL) 952 return -1; 953 cfg->ctx = drv; 954 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink; 955 drv->netlink = netlink_init(cfg); 956 if (drv->netlink == NULL) { 957 os_free(cfg); 958 return -1; 959 } 960 961 return 0; 962 } 963 964 965 static void * hostap_init(struct hostapd_data *hapd, 966 struct wpa_init_params *params) 967 { 968 struct hostap_driver_data *drv; 969 970 drv = os_zalloc(sizeof(struct hostap_driver_data)); 971 if (drv == NULL) { 972 printf("Could not allocate memory for hostapd driver data\n"); 973 return NULL; 974 } 975 976 drv->hapd = hapd; 977 drv->ioctl_sock = drv->sock = -1; 978 memcpy(drv->iface, params->ifname, sizeof(drv->iface)); 979 980 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); 981 if (drv->ioctl_sock < 0) { 982 wpa_printf(MSG_ERROR, "socket[PF_INET,SOCK_DGRAM]: %s", 983 strerror(errno)); 984 os_free(drv); 985 return NULL; 986 } 987 988 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) { 989 wpa_printf(MSG_ERROR, 990 "Could not enable hostapd mode for interface %s", 991 drv->iface); 992 close(drv->ioctl_sock); 993 os_free(drv); 994 return NULL; 995 } 996 997 if (hostap_init_sockets(drv, params->own_addr) || 998 hostap_wireless_event_init(drv)) { 999 close(drv->ioctl_sock); 1000 os_free(drv); 1001 return NULL; 1002 } 1003 1004 return drv; 1005 } 1006 1007 1008 static void hostap_driver_deinit(void *priv) 1009 { 1010 struct hostap_driver_data *drv = priv; 1011 1012 netlink_deinit(drv->netlink); 1013 (void) hostap_set_iface_flags(drv, 0); 1014 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0); 1015 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0); 1016 1017 if (drv->ioctl_sock >= 0) 1018 close(drv->ioctl_sock); 1019 1020 if (drv->sock >= 0) 1021 close(drv->sock); 1022 1023 os_free(drv->generic_ie); 1024 os_free(drv->wps_ie); 1025 1026 free(drv); 1027 } 1028 1029 1030 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr, 1031 u16 reason) 1032 { 1033 struct hostap_driver_data *drv = priv; 1034 struct ieee80211_mgmt mgmt; 1035 1036 if (is_broadcast_ether_addr(addr)) { 1037 /* 1038 * New Prism2.5/3 STA firmware versions seem to have issues 1039 * with this broadcast deauth frame. This gets the firmware in 1040 * odd state where nothing works correctly, so let's skip 1041 * sending this for the hostap driver. 1042 */ 1043 return 0; 1044 } 1045 1046 memset(&mgmt, 0, sizeof(mgmt)); 1047 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1048 WLAN_FC_STYPE_DEAUTH); 1049 memcpy(mgmt.da, addr, ETH_ALEN); 1050 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1051 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1052 mgmt.u.deauth.reason_code = host_to_le16(reason); 1053 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1054 sizeof(mgmt.u.deauth), 0, 0, NULL, 0); 1055 } 1056 1057 1058 static int hostap_set_freq(void *priv, struct hostapd_freq_params *freq) 1059 { 1060 struct hostap_driver_data *drv = priv; 1061 struct iwreq iwr; 1062 1063 os_memset(&iwr, 0, sizeof(iwr)); 1064 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 1065 iwr.u.freq.m = freq->channel; 1066 iwr.u.freq.e = 0; 1067 1068 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) { 1069 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s", 1070 strerror(errno)); 1071 return -1; 1072 } 1073 1074 return 0; 1075 } 1076 1077 1078 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr, 1079 u16 reason) 1080 { 1081 struct hostap_driver_data *drv = priv; 1082 struct ieee80211_mgmt mgmt; 1083 1084 memset(&mgmt, 0, sizeof(mgmt)); 1085 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1086 WLAN_FC_STYPE_DISASSOC); 1087 memcpy(mgmt.da, addr, ETH_ALEN); 1088 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1089 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1090 mgmt.u.disassoc.reason_code = host_to_le16(reason); 1091 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1092 sizeof(mgmt.u.disassoc), 0, 0, NULL, 0); 1093 } 1094 1095 1096 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv, 1097 u16 *num_modes, 1098 u16 *flags, u8 *dfs) 1099 { 1100 struct hostapd_hw_modes *mode; 1101 int i, clen, rlen; 1102 const short chan2freq[14] = { 1103 2412, 2417, 2422, 2427, 2432, 2437, 2442, 1104 2447, 2452, 2457, 2462, 2467, 2472, 2484 1105 }; 1106 1107 mode = os_zalloc(sizeof(struct hostapd_hw_modes)); 1108 if (mode == NULL) 1109 return NULL; 1110 1111 *num_modes = 1; 1112 *flags = 0; 1113 *dfs = 0; 1114 1115 mode->mode = HOSTAPD_MODE_IEEE80211B; 1116 mode->num_channels = 14; 1117 mode->num_rates = 4; 1118 1119 clen = mode->num_channels * sizeof(struct hostapd_channel_data); 1120 rlen = mode->num_rates * sizeof(int); 1121 1122 mode->channels = os_zalloc(clen); 1123 mode->rates = os_zalloc(rlen); 1124 if (mode->channels == NULL || mode->rates == NULL) { 1125 os_free(mode->channels); 1126 os_free(mode->rates); 1127 os_free(mode); 1128 return NULL; 1129 } 1130 1131 for (i = 0; i < 14; i++) { 1132 mode->channels[i].chan = i + 1; 1133 mode->channels[i].freq = chan2freq[i]; 1134 mode->channels[i].allowed_bw = HOSTAPD_CHAN_WIDTH_20; 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, 0, NULL, 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