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