driver_hostap.c revision 1f69aa52ea2e0a73ac502565df8c666ee49cab6a
1/* 2 * Driver interaction with Linux Host AP driver 3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "includes.h" 16#include <sys/ioctl.h> 17 18#include "linux_wext.h" 19#include "common.h" 20#include "driver.h" 21#include "driver_wext.h" 22#include "eloop.h" 23#include "driver_hostap.h" 24 25 26#include <net/if_arp.h> 27#include <netpacket/packet.h> 28 29#include "priv_netlink.h" 30#include "netlink.h" 31#include "linux_ioctl.h" 32#include "common/ieee802_11_defs.h" 33#include "common/ieee802_11_common.h" 34 35 36/* MTU to be set for the wlan#ap device; this is mainly needed for IEEE 802.1X 37 * frames that might be longer than normal default MTU and they are not 38 * fragmented */ 39#define HOSTAPD_MTU 2290 40 41static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 42 43struct hostap_driver_data { 44 struct hostapd_data *hapd; 45 46 char iface[IFNAMSIZ + 1]; 47 int sock; /* raw packet socket for driver access */ 48 int ioctl_sock; /* socket for ioctl() use */ 49 struct netlink_data *netlink; 50 51 int we_version; 52 53 u8 *generic_ie; 54 size_t generic_ie_len; 55 u8 *wps_ie; 56 size_t wps_ie_len; 57}; 58 59 60static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param, 61 int len); 62static int hostap_set_iface_flags(void *priv, int dev_up); 63 64static void handle_data(struct hostap_driver_data *drv, u8 *buf, size_t len, 65 u16 stype) 66{ 67 struct ieee80211_hdr *hdr; 68 u16 fc, ethertype; 69 u8 *pos, *sa; 70 size_t left; 71 union wpa_event_data event; 72 73 if (len < sizeof(struct ieee80211_hdr)) 74 return; 75 76 hdr = (struct ieee80211_hdr *) buf; 77 fc = le_to_host16(hdr->frame_control); 78 79 if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) { 80 printf("Not ToDS data frame (fc=0x%04x)\n", fc); 81 return; 82 } 83 84 sa = hdr->addr2; 85 os_memset(&event, 0, sizeof(event)); 86 event.rx_from_unknown.bssid = get_hdr_bssid(hdr, len); 87 event.rx_from_unknown.addr = sa; 88 wpa_supplicant_event(drv->hapd, EVENT_RX_FROM_UNKNOWN, &event); 89 90 pos = (u8 *) (hdr + 1); 91 left = len - sizeof(*hdr); 92 93 if (left < sizeof(rfc1042_header)) { 94 printf("Too short data frame\n"); 95 return; 96 } 97 98 if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) { 99 printf("Data frame with no RFC1042 header\n"); 100 return; 101 } 102 pos += sizeof(rfc1042_header); 103 left -= sizeof(rfc1042_header); 104 105 if (left < 2) { 106 printf("No ethertype in data frame\n"); 107 return; 108 } 109 110 ethertype = WPA_GET_BE16(pos); 111 pos += 2; 112 left -= 2; 113 switch (ethertype) { 114 case ETH_P_PAE: 115 drv_event_eapol_rx(drv->hapd, sa, pos, left); 116 break; 117 118 default: 119 printf("Unknown ethertype 0x%04x in data frame\n", ethertype); 120 break; 121 } 122} 123 124 125static void handle_tx_callback(struct hostap_driver_data *drv, u8 *buf, 126 size_t len, int ok) 127{ 128 struct ieee80211_hdr *hdr; 129 u16 fc; 130 union wpa_event_data event; 131 132 hdr = (struct ieee80211_hdr *) buf; 133 fc = le_to_host16(hdr->frame_control); 134 135 os_memset(&event, 0, sizeof(event)); 136 event.tx_status.type = WLAN_FC_GET_TYPE(fc); 137 event.tx_status.stype = WLAN_FC_GET_STYPE(fc); 138 event.tx_status.dst = hdr->addr1; 139 event.tx_status.data = buf; 140 event.tx_status.data_len = len; 141 event.tx_status.ack = ok; 142 wpa_supplicant_event(drv->hapd, EVENT_TX_STATUS, &event); 143} 144 145 146static void handle_frame(struct hostap_driver_data *drv, u8 *buf, size_t len) 147{ 148 struct ieee80211_hdr *hdr; 149 u16 fc, extra_len, type, stype; 150 size_t data_len = len; 151 int ver; 152 union wpa_event_data event; 153 154 /* PSPOLL is only 16 bytes, but driver does not (at least yet) pass 155 * these to user space */ 156 if (len < 24) { 157 wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)", 158 (unsigned long) len); 159 return; 160 } 161 162 hdr = (struct ieee80211_hdr *) buf; 163 fc = le_to_host16(hdr->frame_control); 164 type = WLAN_FC_GET_TYPE(fc); 165 stype = WLAN_FC_GET_STYPE(fc); 166 167 if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) { 168 wpa_hexdump(MSG_MSGDUMP, "Received management frame", 169 buf, len); 170 } 171 172 ver = fc & WLAN_FC_PVER; 173 174 /* protocol version 3 is reserved for indicating extra data after the 175 * payload, version 2 for indicating ACKed frame (TX callbacks), and 176 * version 1 for indicating failed frame (no ACK, TX callbacks) */ 177 if (ver == 3) { 178 u8 *pos = buf + len - 2; 179 extra_len = WPA_GET_LE16(pos); 180 printf("extra data in frame (elen=%d)\n", extra_len); 181 if ((size_t) extra_len + 2 > len) { 182 printf(" extra data overflow\n"); 183 return; 184 } 185 len -= extra_len + 2; 186 } else if (ver == 1 || ver == 2) { 187 handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0); 188 return; 189 } else if (ver != 0) { 190 printf("unknown protocol version %d\n", ver); 191 return; 192 } 193 194 switch (type) { 195 case WLAN_FC_TYPE_MGMT: 196 os_memset(&event, 0, sizeof(event)); 197 event.rx_mgmt.frame = buf; 198 event.rx_mgmt.frame_len = data_len; 199 wpa_supplicant_event(drv->hapd, EVENT_RX_MGMT, &event); 200 break; 201 case WLAN_FC_TYPE_CTRL: 202 wpa_printf(MSG_DEBUG, "CTRL"); 203 break; 204 case WLAN_FC_TYPE_DATA: 205 wpa_printf(MSG_DEBUG, "DATA"); 206 handle_data(drv, buf, data_len, stype); 207 break; 208 default: 209 wpa_printf(MSG_DEBUG, "unknown frame type %d", type); 210 break; 211 } 212} 213 214 215static void handle_read(int sock, void *eloop_ctx, void *sock_ctx) 216{ 217 struct hostap_driver_data *drv = eloop_ctx; 218 int len; 219 unsigned char buf[3000]; 220 221 len = recv(sock, buf, sizeof(buf), 0); 222 if (len < 0) { 223 perror("recv"); 224 return; 225 } 226 227 handle_frame(drv, buf, len); 228} 229 230 231static int hostap_init_sockets(struct hostap_driver_data *drv, u8 *own_addr) 232{ 233 struct ifreq ifr; 234 struct sockaddr_ll addr; 235 236 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); 237 if (drv->sock < 0) { 238 perror("socket[PF_PACKET,SOCK_RAW]"); 239 return -1; 240 } 241 242 if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) { 243 printf("Could not register read socket\n"); 244 return -1; 245 } 246 247 memset(&ifr, 0, sizeof(ifr)); 248 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", drv->iface); 249 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) { 250 perror("ioctl(SIOCGIFINDEX)"); 251 return -1; 252 } 253 254 if (hostap_set_iface_flags(drv, 1)) { 255 return -1; 256 } 257 258 memset(&addr, 0, sizeof(addr)); 259 addr.sll_family = AF_PACKET; 260 addr.sll_ifindex = ifr.ifr_ifindex; 261 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d", 262 addr.sll_ifindex); 263 264 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 265 perror("bind"); 266 return -1; 267 } 268 269 return linux_get_ifhwaddr(drv->sock, drv->iface, own_addr); 270} 271 272 273static int hostap_send_mlme(void *priv, const u8 *msg, size_t len, int noack) 274{ 275 struct hostap_driver_data *drv = priv; 276 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg; 277 int res; 278 279 /* Request TX callback */ 280 hdr->frame_control |= host_to_le16(BIT(1)); 281 res = send(drv->sock, msg, len, 0); 282 hdr->frame_control &= ~host_to_le16(BIT(1)); 283 284 return res; 285} 286 287 288static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data, 289 size_t data_len, int encrypt, const u8 *own_addr, 290 u32 flags) 291{ 292 struct hostap_driver_data *drv = priv; 293 struct ieee80211_hdr *hdr; 294 size_t len; 295 u8 *pos; 296 int res; 297 298 len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len; 299 hdr = os_zalloc(len); 300 if (hdr == NULL) { 301 printf("malloc() failed for hostapd_send_data(len=%lu)\n", 302 (unsigned long) len); 303 return -1; 304 } 305 306 hdr->frame_control = 307 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA); 308 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS); 309 if (encrypt) 310 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP); 311 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN); 312 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 313 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 314 315 pos = (u8 *) (hdr + 1); 316 memcpy(pos, rfc1042_header, sizeof(rfc1042_header)); 317 pos += sizeof(rfc1042_header); 318 *((u16 *) pos) = htons(ETH_P_PAE); 319 pos += 2; 320 memcpy(pos, data, data_len); 321 322 res = hostap_send_mlme(drv, (u8 *) hdr, len, 0); 323 if (res < 0) { 324 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - " 325 "failed: %d (%s)", 326 (unsigned long) len, errno, strerror(errno)); 327 } 328 free(hdr); 329 330 return res; 331} 332 333 334static int hostap_sta_set_flags(void *priv, const u8 *addr, 335 int total_flags, int flags_or, int flags_and) 336{ 337 struct hostap_driver_data *drv = priv; 338 struct prism2_hostapd_param param; 339 340 if (flags_or & WPA_STA_AUTHORIZED) 341 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */ 342 if (!(flags_and & WPA_STA_AUTHORIZED)) 343 flags_and = ~BIT(5); 344 else 345 flags_and = ~0; 346 memset(¶m, 0, sizeof(param)); 347 param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA; 348 memcpy(param.sta_addr, addr, ETH_ALEN); 349 param.u.set_flags_sta.flags_or = flags_or; 350 param.u.set_flags_sta.flags_and = flags_and; 351 return hostapd_ioctl(drv, ¶m, sizeof(param)); 352} 353 354 355static int hostap_set_iface_flags(void *priv, int dev_up) 356{ 357 struct hostap_driver_data *drv = priv; 358 struct ifreq ifr; 359 char ifname[IFNAMSIZ]; 360 361 os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface); 362 if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0) 363 return -1; 364 365 if (dev_up) { 366 memset(&ifr, 0, sizeof(ifr)); 367 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); 368 ifr.ifr_mtu = HOSTAPD_MTU; 369 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) { 370 perror("ioctl[SIOCSIFMTU]"); 371 printf("Setting MTU failed - trying to survive with " 372 "current value\n"); 373 } 374 } 375 376 return 0; 377} 378 379 380static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param, 381 int len) 382{ 383 struct hostap_driver_data *drv = priv; 384 struct iwreq iwr; 385 386 memset(&iwr, 0, sizeof(iwr)); 387 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 388 iwr.u.data.pointer = (caddr_t) param; 389 iwr.u.data.length = len; 390 391 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) { 392 perror("ioctl[PRISM2_IOCTL_HOSTAPD]"); 393 return -1; 394 } 395 396 return 0; 397} 398 399 400static int wpa_driver_hostap_set_key(const char *ifname, void *priv, 401 enum wpa_alg alg, const u8 *addr, 402 int key_idx, int set_tx, 403 const u8 *seq, size_t seq_len, 404 const u8 *key, size_t key_len) 405{ 406 struct hostap_driver_data *drv = priv; 407 struct prism2_hostapd_param *param; 408 u8 *buf; 409 size_t blen; 410 int ret = 0; 411 412 blen = sizeof(*param) + key_len; 413 buf = os_zalloc(blen); 414 if (buf == NULL) 415 return -1; 416 417 param = (struct prism2_hostapd_param *) buf; 418 param->cmd = PRISM2_SET_ENCRYPTION; 419 if (addr == NULL) 420 memset(param->sta_addr, 0xff, ETH_ALEN); 421 else 422 memcpy(param->sta_addr, addr, ETH_ALEN); 423 switch (alg) { 424 case WPA_ALG_NONE: 425 os_strlcpy((char *) param->u.crypt.alg, "NONE", 426 HOSTAP_CRYPT_ALG_NAME_LEN); 427 break; 428 case WPA_ALG_WEP: 429 os_strlcpy((char *) param->u.crypt.alg, "WEP", 430 HOSTAP_CRYPT_ALG_NAME_LEN); 431 break; 432 case WPA_ALG_TKIP: 433 os_strlcpy((char *) param->u.crypt.alg, "TKIP", 434 HOSTAP_CRYPT_ALG_NAME_LEN); 435 break; 436 case WPA_ALG_CCMP: 437 os_strlcpy((char *) param->u.crypt.alg, "CCMP", 438 HOSTAP_CRYPT_ALG_NAME_LEN); 439 break; 440 default: 441 os_free(buf); 442 return -1; 443 } 444 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0; 445 param->u.crypt.idx = key_idx; 446 param->u.crypt.key_len = key_len; 447 memcpy((u8 *) (param + 1), key, key_len); 448 449 if (hostapd_ioctl(drv, param, blen)) { 450 printf("Failed to set encryption.\n"); 451 ret = -1; 452 } 453 free(buf); 454 455 return ret; 456} 457 458 459static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr, 460 int idx, u8 *seq) 461{ 462 struct hostap_driver_data *drv = priv; 463 struct prism2_hostapd_param *param; 464 u8 *buf; 465 size_t blen; 466 int ret = 0; 467 468 blen = sizeof(*param) + 32; 469 buf = os_zalloc(blen); 470 if (buf == NULL) 471 return -1; 472 473 param = (struct prism2_hostapd_param *) buf; 474 param->cmd = PRISM2_GET_ENCRYPTION; 475 if (addr == NULL) 476 memset(param->sta_addr, 0xff, ETH_ALEN); 477 else 478 memcpy(param->sta_addr, addr, ETH_ALEN); 479 param->u.crypt.idx = idx; 480 481 if (hostapd_ioctl(drv, param, blen)) { 482 printf("Failed to get encryption.\n"); 483 ret = -1; 484 } else { 485 memcpy(seq, param->u.crypt.seq, 8); 486 } 487 free(buf); 488 489 return ret; 490} 491 492 493static int hostap_ioctl_prism2param(void *priv, int param, int value) 494{ 495 struct hostap_driver_data *drv = priv; 496 struct iwreq iwr; 497 int *i; 498 499 memset(&iwr, 0, sizeof(iwr)); 500 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 501 i = (int *) iwr.u.name; 502 *i++ = param; 503 *i++ = value; 504 505 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) { 506 perror("ioctl[PRISM2_IOCTL_PRISM2_PARAM]"); 507 return -1; 508 } 509 510 return 0; 511} 512 513 514static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params) 515{ 516 struct hostap_driver_data *drv = priv; 517 int enabled = params->enabled; 518 519 /* enable kernel driver support for IEEE 802.1X */ 520 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) { 521 printf("Could not setup IEEE 802.1X support in kernel driver." 522 "\n"); 523 return -1; 524 } 525 526 if (!enabled) 527 return 0; 528 529 /* use host driver implementation of encryption to allow 530 * individual keys and passing plaintext EAPOL frames */ 531 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) || 532 hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) { 533 printf("Could not setup host-based encryption in kernel " 534 "driver.\n"); 535 return -1; 536 } 537 538 return 0; 539} 540 541 542static int hostap_set_privacy(void *priv, int enabled) 543{ 544 struct hostap_drvier_data *drv = priv; 545 546 return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED, 547 enabled); 548} 549 550 551static int hostap_set_ssid(void *priv, const u8 *buf, int len) 552{ 553 struct hostap_driver_data *drv = priv; 554 struct iwreq iwr; 555 556 memset(&iwr, 0, sizeof(iwr)); 557 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 558 iwr.u.essid.flags = 1; /* SSID active */ 559 iwr.u.essid.pointer = (caddr_t) buf; 560 iwr.u.essid.length = len + 1; 561 562 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) { 563 perror("ioctl[SIOCSIWESSID]"); 564 printf("len=%d\n", len); 565 return -1; 566 } 567 568 return 0; 569} 570 571 572static int hostap_flush(void *priv) 573{ 574 struct hostap_driver_data *drv = priv; 575 struct prism2_hostapd_param param; 576 577 memset(¶m, 0, sizeof(param)); 578 param.cmd = PRISM2_HOSTAPD_FLUSH; 579 return hostapd_ioctl(drv, ¶m, sizeof(param)); 580} 581 582 583static int hostap_read_sta_data(void *priv, 584 struct hostap_sta_driver_data *data, 585 const u8 *addr) 586{ 587 struct hostap_driver_data *drv = priv; 588 char buf[1024], line[128], *pos; 589 FILE *f; 590 unsigned long val; 591 592 memset(data, 0, sizeof(*data)); 593 snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR, 594 drv->iface, MAC2STR(addr)); 595 596 f = fopen(buf, "r"); 597 if (!f) 598 return -1; 599 /* Need to read proc file with in one piece, so use large enough 600 * buffer. */ 601 setbuffer(f, buf, sizeof(buf)); 602 603 while (fgets(line, sizeof(line), f)) { 604 pos = strchr(line, '='); 605 if (!pos) 606 continue; 607 *pos++ = '\0'; 608 val = strtoul(pos, NULL, 10); 609 if (strcmp(line, "rx_packets") == 0) 610 data->rx_packets = val; 611 else if (strcmp(line, "tx_packets") == 0) 612 data->tx_packets = val; 613 else if (strcmp(line, "rx_bytes") == 0) 614 data->rx_bytes = val; 615 else if (strcmp(line, "tx_bytes") == 0) 616 data->tx_bytes = val; 617 } 618 619 fclose(f); 620 621 return 0; 622} 623 624 625static int hostap_sta_add(void *priv, struct hostapd_sta_add_params *params) 626{ 627 struct hostap_driver_data *drv = priv; 628 struct prism2_hostapd_param param; 629 int tx_supp_rates = 0; 630 size_t i; 631 632#define WLAN_RATE_1M BIT(0) 633#define WLAN_RATE_2M BIT(1) 634#define WLAN_RATE_5M5 BIT(2) 635#define WLAN_RATE_11M BIT(3) 636 637 for (i = 0; i < params->supp_rates_len; i++) { 638 if ((params->supp_rates[i] & 0x7f) == 2) 639 tx_supp_rates |= WLAN_RATE_1M; 640 if ((params->supp_rates[i] & 0x7f) == 4) 641 tx_supp_rates |= WLAN_RATE_2M; 642 if ((params->supp_rates[i] & 0x7f) == 11) 643 tx_supp_rates |= WLAN_RATE_5M5; 644 if ((params->supp_rates[i] & 0x7f) == 22) 645 tx_supp_rates |= WLAN_RATE_11M; 646 } 647 648 memset(¶m, 0, sizeof(param)); 649 param.cmd = PRISM2_HOSTAPD_ADD_STA; 650 memcpy(param.sta_addr, params->addr, ETH_ALEN); 651 param.u.add_sta.aid = params->aid; 652 param.u.add_sta.capability = params->capability; 653 param.u.add_sta.tx_supp_rates = tx_supp_rates; 654 return hostapd_ioctl(drv, ¶m, sizeof(param)); 655} 656 657 658static int hostap_sta_remove(void *priv, const u8 *addr) 659{ 660 struct hostap_driver_data *drv = priv; 661 struct prism2_hostapd_param param; 662 663 hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED); 664 665 memset(¶m, 0, sizeof(param)); 666 param.cmd = PRISM2_HOSTAPD_REMOVE_STA; 667 memcpy(param.sta_addr, addr, ETH_ALEN); 668 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 669 printf("Could not remove station from kernel driver.\n"); 670 return -1; 671 } 672 return 0; 673} 674 675 676static int hostap_get_inact_sec(void *priv, const u8 *addr) 677{ 678 struct hostap_driver_data *drv = priv; 679 struct prism2_hostapd_param param; 680 681 memset(¶m, 0, sizeof(param)); 682 param.cmd = PRISM2_HOSTAPD_GET_INFO_STA; 683 memcpy(param.sta_addr, addr, ETH_ALEN); 684 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 685 return -1; 686 } 687 688 return param.u.get_info_sta.inactive_sec; 689} 690 691 692static int hostap_sta_clear_stats(void *priv, const u8 *addr) 693{ 694 struct hostap_driver_data *drv = priv; 695 struct prism2_hostapd_param param; 696 697 memset(¶m, 0, sizeof(param)); 698 param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS; 699 memcpy(param.sta_addr, addr, ETH_ALEN); 700 if (hostapd_ioctl(drv, ¶m, sizeof(param))) { 701 return -1; 702 } 703 704 return 0; 705} 706 707 708static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv) 709{ 710 struct prism2_hostapd_param *param; 711 int res; 712 size_t blen, elem_len; 713 714 elem_len = drv->generic_ie_len + drv->wps_ie_len; 715 blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len; 716 if (blen < sizeof(*param)) 717 blen = sizeof(*param); 718 719 param = os_zalloc(blen); 720 if (param == NULL) 721 return -1; 722 723 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT; 724 param->u.generic_elem.len = elem_len; 725 if (drv->generic_ie) { 726 os_memcpy(param->u.generic_elem.data, drv->generic_ie, 727 drv->generic_ie_len); 728 } 729 if (drv->wps_ie) { 730 os_memcpy(¶m->u.generic_elem.data[drv->generic_ie_len], 731 drv->wps_ie, drv->wps_ie_len); 732 } 733 wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE", 734 param->u.generic_elem.data, elem_len); 735 res = hostapd_ioctl(drv, param, blen); 736 737 os_free(param); 738 739 return res; 740} 741 742 743static int hostap_set_generic_elem(void *priv, 744 const u8 *elem, size_t elem_len) 745{ 746 struct hostap_driver_data *drv = priv; 747 748 os_free(drv->generic_ie); 749 drv->generic_ie = NULL; 750 drv->generic_ie_len = 0; 751 if (elem) { 752 drv->generic_ie = os_malloc(elem_len); 753 if (drv->generic_ie == NULL) 754 return -1; 755 os_memcpy(drv->generic_ie, elem, elem_len); 756 drv->generic_ie_len = elem_len; 757 } 758 759 return hostapd_ioctl_set_generic_elem(drv); 760} 761 762 763static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon, 764 const struct wpabuf *proberesp, 765 const struct wpabuf *assocresp) 766{ 767 struct hostap_driver_data *drv = priv; 768 769 /* 770 * Host AP driver supports only one set of extra IEs, so we need to 771 * use the Probe Response IEs also for Beacon frames since they include 772 * more information. 773 */ 774 775 os_free(drv->wps_ie); 776 drv->wps_ie = NULL; 777 drv->wps_ie_len = 0; 778 if (proberesp) { 779 drv->wps_ie = os_malloc(wpabuf_len(proberesp)); 780 if (drv->wps_ie == NULL) 781 return -1; 782 os_memcpy(drv->wps_ie, wpabuf_head(proberesp), 783 wpabuf_len(proberesp)); 784 drv->wps_ie_len = wpabuf_len(proberesp); 785 } 786 787 return hostapd_ioctl_set_generic_elem(drv); 788} 789 790 791static void 792hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv, 793 char *custom) 794{ 795 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom); 796 797 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) { 798 char *pos; 799 u8 addr[ETH_ALEN]; 800 pos = strstr(custom, "addr="); 801 if (pos == NULL) { 802 wpa_printf(MSG_DEBUG, 803 "MLME-MICHAELMICFAILURE.indication " 804 "without sender address ignored"); 805 return; 806 } 807 pos += 5; 808 if (hwaddr_aton(pos, addr) == 0) { 809 union wpa_event_data data; 810 os_memset(&data, 0, sizeof(data)); 811 data.michael_mic_failure.unicast = 1; 812 data.michael_mic_failure.src = addr; 813 wpa_supplicant_event(drv->hapd, 814 EVENT_MICHAEL_MIC_FAILURE, &data); 815 } else { 816 wpa_printf(MSG_DEBUG, 817 "MLME-MICHAELMICFAILURE.indication " 818 "with invalid MAC address"); 819 } 820 } 821} 822 823 824static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv, 825 char *data, int len) 826{ 827 struct iw_event iwe_buf, *iwe = &iwe_buf; 828 char *pos, *end, *custom, *buf; 829 830 pos = data; 831 end = data + len; 832 833 while (pos + IW_EV_LCP_LEN <= end) { 834 /* Event data may be unaligned, so make a local, aligned copy 835 * before processing. */ 836 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); 837 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d", 838 iwe->cmd, iwe->len); 839 if (iwe->len <= IW_EV_LCP_LEN) 840 return; 841 842 custom = pos + IW_EV_POINT_LEN; 843 if (drv->we_version > 18 && 844 (iwe->cmd == IWEVMICHAELMICFAILURE || 845 iwe->cmd == IWEVCUSTOM)) { 846 /* WE-19 removed the pointer from struct iw_point */ 847 char *dpos = (char *) &iwe_buf.u.data.length; 848 int dlen = dpos - (char *) &iwe_buf; 849 memcpy(dpos, pos + IW_EV_LCP_LEN, 850 sizeof(struct iw_event) - dlen); 851 } else { 852 memcpy(&iwe_buf, pos, sizeof(struct iw_event)); 853 custom += IW_EV_POINT_OFF; 854 } 855 856 switch (iwe->cmd) { 857 case IWEVCUSTOM: 858 if (custom + iwe->u.data.length > end) 859 return; 860 buf = malloc(iwe->u.data.length + 1); 861 if (buf == NULL) 862 return; 863 memcpy(buf, custom, iwe->u.data.length); 864 buf[iwe->u.data.length] = '\0'; 865 hostapd_wireless_event_wireless_custom(drv, buf); 866 free(buf); 867 break; 868 } 869 870 pos += iwe->len; 871 } 872} 873 874 875static void hostapd_wireless_event_rtm_newlink(void *ctx, 876 struct ifinfomsg *ifi, 877 u8 *buf, size_t len) 878{ 879 struct hostap_driver_data *drv = ctx; 880 int attrlen, rta_len; 881 struct rtattr *attr; 882 883 /* TODO: use ifi->ifi_index to filter out wireless events from other 884 * interfaces */ 885 886 attrlen = len; 887 attr = (struct rtattr *) buf; 888 889 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 890 while (RTA_OK(attr, attrlen)) { 891 if (attr->rta_type == IFLA_WIRELESS) { 892 hostapd_wireless_event_wireless( 893 drv, ((char *) attr) + rta_len, 894 attr->rta_len - rta_len); 895 } 896 attr = RTA_NEXT(attr, attrlen); 897 } 898} 899 900 901static int hostap_get_we_version(struct hostap_driver_data *drv) 902{ 903 struct iw_range *range; 904 struct iwreq iwr; 905 int minlen; 906 size_t buflen; 907 908 drv->we_version = 0; 909 910 /* 911 * Use larger buffer than struct iw_range in order to allow the 912 * structure to grow in the future. 913 */ 914 buflen = sizeof(struct iw_range) + 500; 915 range = os_zalloc(buflen); 916 if (range == NULL) 917 return -1; 918 919 memset(&iwr, 0, sizeof(iwr)); 920 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ); 921 iwr.u.data.pointer = (caddr_t) range; 922 iwr.u.data.length = buflen; 923 924 minlen = ((char *) &range->enc_capa) - (char *) range + 925 sizeof(range->enc_capa); 926 927 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) { 928 perror("ioctl[SIOCGIWRANGE]"); 929 free(range); 930 return -1; 931 } else if (iwr.u.data.length >= minlen && 932 range->we_version_compiled >= 18) { 933 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d " 934 "WE(source)=%d enc_capa=0x%x", 935 range->we_version_compiled, 936 range->we_version_source, 937 range->enc_capa); 938 drv->we_version = range->we_version_compiled; 939 } 940 941 free(range); 942 return 0; 943} 944 945 946static int hostap_wireless_event_init(struct hostap_driver_data *drv) 947{ 948 struct netlink_config *cfg; 949 950 hostap_get_we_version(drv); 951 952 cfg = os_zalloc(sizeof(*cfg)); 953 if (cfg == NULL) 954 return -1; 955 cfg->ctx = drv; 956 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink; 957 drv->netlink = netlink_init(cfg); 958 if (drv->netlink == NULL) { 959 os_free(cfg); 960 return -1; 961 } 962 963 return 0; 964} 965 966 967static void * hostap_init(struct hostapd_data *hapd, 968 struct wpa_init_params *params) 969{ 970 struct hostap_driver_data *drv; 971 972 drv = os_zalloc(sizeof(struct hostap_driver_data)); 973 if (drv == NULL) { 974 printf("Could not allocate memory for hostapd driver data\n"); 975 return NULL; 976 } 977 978 drv->hapd = hapd; 979 drv->ioctl_sock = drv->sock = -1; 980 memcpy(drv->iface, params->ifname, sizeof(drv->iface)); 981 982 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); 983 if (drv->ioctl_sock < 0) { 984 perror("socket[PF_INET,SOCK_DGRAM]"); 985 free(drv); 986 return NULL; 987 } 988 989 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) { 990 printf("Could not enable hostapd mode for interface %s\n", 991 drv->iface); 992 close(drv->ioctl_sock); 993 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 free(drv); 1001 return NULL; 1002 } 1003 1004 return drv; 1005} 1006 1007 1008static 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 1030static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr, 1031 int 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); 1055} 1056 1057 1058static 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 perror("ioctl[SIOCSIWFREQ]"); 1070 return -1; 1071 } 1072 1073 return 0; 1074} 1075 1076 1077static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr, 1078 int reason) 1079{ 1080 struct hostap_driver_data *drv = priv; 1081 struct ieee80211_mgmt mgmt; 1082 1083 memset(&mgmt, 0, sizeof(mgmt)); 1084 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1085 WLAN_FC_STYPE_DISASSOC); 1086 memcpy(mgmt.da, addr, ETH_ALEN); 1087 memcpy(mgmt.sa, own_addr, ETH_ALEN); 1088 memcpy(mgmt.bssid, own_addr, ETH_ALEN); 1089 mgmt.u.disassoc.reason_code = host_to_le16(reason); 1090 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN + 1091 sizeof(mgmt.u.disassoc), 0); 1092} 1093 1094 1095static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv, 1096 u16 *num_modes, 1097 u16 *flags) 1098{ 1099 struct hostapd_hw_modes *mode; 1100 int i, clen, rlen; 1101 const short chan2freq[14] = { 1102 2412, 2417, 2422, 2427, 2432, 2437, 2442, 1103 2447, 2452, 2457, 2462, 2467, 2472, 2484 1104 }; 1105 1106 mode = os_zalloc(sizeof(struct hostapd_hw_modes)); 1107 if (mode == NULL) 1108 return NULL; 1109 1110 *num_modes = 1; 1111 *flags = 0; 1112 1113 mode->mode = HOSTAPD_MODE_IEEE80211B; 1114 mode->num_channels = 14; 1115 mode->num_rates = 4; 1116 1117 clen = mode->num_channels * sizeof(struct hostapd_channel_data); 1118 rlen = mode->num_rates * sizeof(int); 1119 1120 mode->channels = os_zalloc(clen); 1121 mode->rates = os_zalloc(rlen); 1122 if (mode->channels == NULL || mode->rates == NULL) { 1123 os_free(mode->channels); 1124 os_free(mode->rates); 1125 os_free(mode); 1126 return NULL; 1127 } 1128 1129 for (i = 0; i < 14; i++) { 1130 mode->channels[i].chan = i + 1; 1131 mode->channels[i].freq = chan2freq[i]; 1132 /* TODO: Get allowed channel list from the driver */ 1133 if (i >= 11) 1134 mode->channels[i].flag = HOSTAPD_CHAN_DISABLED; 1135 } 1136 1137 mode->rates[0] = 10; 1138 mode->rates[1] = 20; 1139 mode->rates[2] = 55; 1140 mode->rates[3] = 110; 1141 1142 return mode; 1143} 1144 1145 1146static void wpa_driver_hostap_poll_client(void *priv, const u8 *own_addr, 1147 const u8 *addr, int qos) 1148{ 1149 struct ieee80211_hdr hdr; 1150 1151 os_memset(&hdr, 0, sizeof(hdr)); 1152 1153 /* 1154 * WLAN_FC_STYPE_NULLFUNC would be more appropriate, 1155 * but it is apparently not retried so TX Exc events 1156 * are not received for it. 1157 * This is the reason the driver overrides the default 1158 * handling. 1159 */ 1160 hdr.frame_control = IEEE80211_FC(WLAN_FC_TYPE_DATA, 1161 WLAN_FC_STYPE_DATA); 1162 1163 hdr.frame_control |= 1164 host_to_le16(WLAN_FC_FROMDS); 1165 os_memcpy(hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN); 1166 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN); 1167 os_memcpy(hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN); 1168 1169 hostap_send_mlme(priv, (u8 *)&hdr, sizeof(hdr), 0); 1170} 1171 1172 1173const struct wpa_driver_ops wpa_driver_hostap_ops = { 1174 .name = "hostap", 1175 .desc = "Host AP driver (Intersil Prism2/2.5/3)", 1176 .set_key = wpa_driver_hostap_set_key, 1177 .hapd_init = hostap_init, 1178 .hapd_deinit = hostap_driver_deinit, 1179 .set_ieee8021x = hostap_set_ieee8021x, 1180 .set_privacy = hostap_set_privacy, 1181 .get_seqnum = hostap_get_seqnum, 1182 .flush = hostap_flush, 1183 .set_generic_elem = hostap_set_generic_elem, 1184 .read_sta_data = hostap_read_sta_data, 1185 .hapd_send_eapol = hostap_send_eapol, 1186 .sta_set_flags = hostap_sta_set_flags, 1187 .sta_deauth = hostap_sta_deauth, 1188 .sta_disassoc = hostap_sta_disassoc, 1189 .sta_remove = hostap_sta_remove, 1190 .hapd_set_ssid = hostap_set_ssid, 1191 .send_mlme = hostap_send_mlme, 1192 .sta_add = hostap_sta_add, 1193 .get_inact_sec = hostap_get_inact_sec, 1194 .sta_clear_stats = hostap_sta_clear_stats, 1195 .get_hw_feature_data = hostap_get_hw_feature_data, 1196 .set_ap_wps_ie = hostap_set_ap_wps_ie, 1197 .set_freq = hostap_set_freq, 1198 .poll_client = wpa_driver_hostap_poll_client, 1199}; 1200