2 * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
3 * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
14 * This file implements a driver interface for the Linux Wireless Extensions.
15 * When used with WE-18 or newer, this interface can be used as-is with number
16 * of drivers. In addition to this, some of the common functions in this file
17 * can be used by other driver interface implementations that use generic WE
18 * ioctls, but require private ioctls for some of the functionality.
22 #include <sys/ioctl.h>
23 #include <net/if_arp.h>
25 #include "wireless_copy.h"
28 #include "common/ieee802_11_defs.h"
29 #include "common/wpa_common.h"
30 #include "priv_netlink.h"
33 #include "driver_wext.h"
36 static int wpa_driver_wext_flush_pmkid(void *priv);
37 static int wpa_driver_wext_get_range(void *priv);
38 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
39 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
40 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
43 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
49 os_memset(&iwr, 0, sizeof(iwr));
50 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
51 iwr.u.param.flags = idx & IW_AUTH_INDEX;
52 iwr.u.param.value = value;
54 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
55 if (errno != EOPNOTSUPP) {
56 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
57 "value 0x%x) failed: %s)",
58 idx, value, strerror(errno));
60 ret = errno == EOPNOTSUPP ? -2 : -1;
68 * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
69 * @priv: Pointer to private wext data from wpa_driver_wext_init()
70 * @bssid: Buffer for BSSID
71 * Returns: 0 on success, -1 on failure
73 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
75 struct wpa_driver_wext_data *drv = priv;
79 os_memset(&iwr, 0, sizeof(iwr));
80 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
82 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
83 perror("ioctl[SIOCGIWAP]");
86 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
93 * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
94 * @priv: Pointer to private wext data from wpa_driver_wext_init()
96 * Returns: 0 on success, -1 on failure
98 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
100 struct wpa_driver_wext_data *drv = priv;
104 os_memset(&iwr, 0, sizeof(iwr));
105 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
106 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
108 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
110 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
112 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
113 perror("ioctl[SIOCSIWAP]");
122 * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
123 * @priv: Pointer to private wext data from wpa_driver_wext_init()
124 * @ssid: Buffer for the SSID; must be at least 32 bytes long
125 * Returns: SSID length on success, -1 on failure
127 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
129 struct wpa_driver_wext_data *drv = priv;
133 os_memset(&iwr, 0, sizeof(iwr));
134 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
135 iwr.u.essid.pointer = (caddr_t) ssid;
136 iwr.u.essid.length = 32;
138 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
139 perror("ioctl[SIOCGIWESSID]");
142 ret = iwr.u.essid.length;
145 /* Some drivers include nul termination in the SSID, so let's
146 * remove it here before further processing. WE-21 changes this
147 * to explicitly require the length _not_ to include nul
149 if (ret > 0 && ssid[ret - 1] == '\0' &&
150 drv->we_version_compiled < 21)
159 * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
160 * @priv: Pointer to private wext data from wpa_driver_wext_init()
162 * @ssid_len: Length of SSID (0..32)
163 * Returns: 0 on success, -1 on failure
165 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
167 struct wpa_driver_wext_data *drv = priv;
175 os_memset(&iwr, 0, sizeof(iwr));
176 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
177 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
178 iwr.u.essid.flags = (ssid_len != 0);
179 os_memset(buf, 0, sizeof(buf));
180 os_memcpy(buf, ssid, ssid_len);
181 iwr.u.essid.pointer = (caddr_t) buf;
182 if (drv->we_version_compiled < 21) {
183 /* For historic reasons, set SSID length to include one extra
184 * character, C string nul termination, even though SSID is
185 * really an octet string that should not be presented as a C
186 * string. Some Linux drivers decrement the length by one and
187 * can thus end up missing the last octet of the SSID if the
188 * length is not incremented here. WE-21 changes this to
189 * explicitly require the length _not_ to include nul
194 iwr.u.essid.length = ssid_len;
196 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
197 perror("ioctl[SIOCSIWESSID]");
206 * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
207 * @priv: Pointer to private wext data from wpa_driver_wext_init()
208 * @freq: Frequency in MHz
209 * Returns: 0 on success, -1 on failure
211 int wpa_driver_wext_set_freq(void *priv, int freq)
213 struct wpa_driver_wext_data *drv = priv;
217 os_memset(&iwr, 0, sizeof(iwr));
218 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
219 iwr.u.freq.m = freq * 100000;
222 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
223 perror("ioctl[SIOCSIWFREQ]");
232 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
234 union wpa_event_data data;
236 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
239 os_memset(&data, 0, sizeof(data));
241 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
242 data.michael_mic_failure.unicast =
243 os_strstr(custom, " unicast ") != NULL;
244 /* TODO: parse parameters(?) */
245 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
246 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
249 u8 *req_ies = NULL, *resp_ies = NULL;
253 bytes = strspn(spos, "0123456789abcdefABCDEF");
254 if (!bytes || (bytes & 1))
258 req_ies = os_malloc(bytes);
261 hexstr2bin(spos, req_ies, bytes);
262 data.assoc_info.req_ies = req_ies;
263 data.assoc_info.req_ies_len = bytes;
267 data.assoc_info.resp_ies = NULL;
268 data.assoc_info.resp_ies_len = 0;
270 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
273 bytes = strspn(spos, "0123456789abcdefABCDEF");
274 if (!bytes || (bytes & 1))
278 resp_ies = os_malloc(bytes);
279 if (resp_ies == NULL)
281 hexstr2bin(spos, resp_ies, bytes);
282 data.assoc_info.resp_ies = resp_ies;
283 data.assoc_info.resp_ies_len = bytes;
286 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
291 #ifdef CONFIG_PEERKEY
292 } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
293 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
294 wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
295 "STKSTART.request '%s'", custom + 17);
298 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
299 #endif /* CONFIG_PEERKEY */
304 static int wpa_driver_wext_event_wireless_michaelmicfailure(
305 void *ctx, const char *ev, size_t len)
307 const struct iw_michaelmicfailure *mic;
308 union wpa_event_data data;
310 if (len < sizeof(*mic))
313 mic = (const struct iw_michaelmicfailure *) ev;
315 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
316 "flags=0x%x src_addr=" MACSTR, mic->flags,
317 MAC2STR(mic->src_addr.sa_data));
319 os_memset(&data, 0, sizeof(data));
320 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
321 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
327 static int wpa_driver_wext_event_wireless_pmkidcand(
328 struct wpa_driver_wext_data *drv, const char *ev, size_t len)
330 const struct iw_pmkid_cand *cand;
331 union wpa_event_data data;
334 if (len < sizeof(*cand))
337 cand = (const struct iw_pmkid_cand *) ev;
338 addr = (const u8 *) cand->bssid.sa_data;
340 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
341 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
342 cand->index, MAC2STR(addr));
344 os_memset(&data, 0, sizeof(data));
345 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
346 data.pmkid_candidate.index = cand->index;
347 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
348 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
354 static int wpa_driver_wext_event_wireless_assocreqie(
355 struct wpa_driver_wext_data *drv, const char *ev, int len)
360 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
362 os_free(drv->assoc_req_ies);
363 drv->assoc_req_ies = os_malloc(len);
364 if (drv->assoc_req_ies == NULL) {
365 drv->assoc_req_ies_len = 0;
368 os_memcpy(drv->assoc_req_ies, ev, len);
369 drv->assoc_req_ies_len = len;
375 static int wpa_driver_wext_event_wireless_assocrespie(
376 struct wpa_driver_wext_data *drv, const char *ev, int len)
381 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
383 os_free(drv->assoc_resp_ies);
384 drv->assoc_resp_ies = os_malloc(len);
385 if (drv->assoc_resp_ies == NULL) {
386 drv->assoc_resp_ies_len = 0;
389 os_memcpy(drv->assoc_resp_ies, ev, len);
390 drv->assoc_resp_ies_len = len;
396 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
398 union wpa_event_data data;
400 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
403 os_memset(&data, 0, sizeof(data));
404 if (drv->assoc_req_ies) {
405 data.assoc_info.req_ies = drv->assoc_req_ies;
406 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
408 if (drv->assoc_resp_ies) {
409 data.assoc_info.resp_ies = drv->assoc_resp_ies;
410 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
413 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
415 os_free(drv->assoc_req_ies);
416 drv->assoc_req_ies = NULL;
417 os_free(drv->assoc_resp_ies);
418 drv->assoc_resp_ies = NULL;
422 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
425 struct iw_event iwe_buf, *iwe = &iwe_buf;
426 char *pos, *end, *custom, *buf;
431 while (pos + IW_EV_LCP_LEN <= end) {
432 /* Event data may be unaligned, so make a local, aligned copy
433 * before processing. */
434 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
435 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
437 if (iwe->len <= IW_EV_LCP_LEN)
440 custom = pos + IW_EV_POINT_LEN;
441 if (drv->we_version_compiled > 18 &&
442 (iwe->cmd == IWEVMICHAELMICFAILURE ||
443 iwe->cmd == IWEVCUSTOM ||
444 iwe->cmd == IWEVASSOCREQIE ||
445 iwe->cmd == IWEVASSOCRESPIE ||
446 iwe->cmd == IWEVPMKIDCAND)) {
447 /* WE-19 removed the pointer from struct iw_point */
448 char *dpos = (char *) &iwe_buf.u.data.length;
449 int dlen = dpos - (char *) &iwe_buf;
450 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
451 sizeof(struct iw_event) - dlen);
453 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
454 custom += IW_EV_POINT_OFF;
459 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
461 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
462 if (is_zero_ether_addr(
463 (const u8 *) iwe->u.ap_addr.sa_data) ||
464 os_memcmp(iwe->u.ap_addr.sa_data,
465 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
467 os_free(drv->assoc_req_ies);
468 drv->assoc_req_ies = NULL;
469 os_free(drv->assoc_resp_ies);
470 drv->assoc_resp_ies = NULL;
471 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
475 wpa_driver_wext_event_assoc_ies(drv);
476 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
480 case IWEVMICHAELMICFAILURE:
481 if (custom + iwe->u.data.length > end) {
482 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
483 "IWEVMICHAELMICFAILURE length");
486 wpa_driver_wext_event_wireless_michaelmicfailure(
487 drv->ctx, custom, iwe->u.data.length);
490 if (custom + iwe->u.data.length > end) {
491 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
492 "IWEVCUSTOM length");
495 buf = os_malloc(iwe->u.data.length + 1);
498 os_memcpy(buf, custom, iwe->u.data.length);
499 buf[iwe->u.data.length] = '\0';
500 wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
504 drv->scan_complete_events = 1;
505 eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
507 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
511 if (custom + iwe->u.data.length > end) {
512 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
513 "IWEVASSOCREQIE length");
516 wpa_driver_wext_event_wireless_assocreqie(
517 drv, custom, iwe->u.data.length);
519 case IWEVASSOCRESPIE:
520 if (custom + iwe->u.data.length > end) {
521 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
522 "IWEVASSOCRESPIE length");
525 wpa_driver_wext_event_wireless_assocrespie(
526 drv, custom, iwe->u.data.length);
529 if (custom + iwe->u.data.length > end) {
530 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
531 "IWEVPMKIDCAND length");
534 wpa_driver_wext_event_wireless_pmkidcand(
535 drv, custom, iwe->u.data.length);
544 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
545 char *buf, size_t len, int del)
547 union wpa_event_data event;
549 os_memset(&event, 0, sizeof(event));
550 if (len > sizeof(event.interface_status.ifname))
551 len = sizeof(event.interface_status.ifname) - 1;
552 os_memcpy(event.interface_status.ifname, buf, len);
553 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
554 EVENT_INTERFACE_ADDED;
556 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
558 event.interface_status.ifname,
559 del ? "removed" : "added");
561 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
568 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
572 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
575 int attrlen, rta_len;
579 attr = (struct rtattr *) buf;
581 rta_len = RTA_ALIGN(sizeof(struct rtattr));
582 while (RTA_OK(attr, attrlen)) {
583 if (attr->rta_type == IFLA_IFNAME) {
584 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
590 attr = RTA_NEXT(attr, attrlen);
597 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
598 int ifindex, u8 *buf, size_t len)
600 if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
603 if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
604 drv->ifindex = if_nametoindex(drv->ifname);
605 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
607 wpa_driver_wext_finish_drv_init(drv);
615 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
618 struct wpa_driver_wext_data *drv = ctx;
619 int attrlen, rta_len;
622 if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
623 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
628 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
630 drv->operstate, ifi->ifi_flags,
631 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
632 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
633 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
634 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
636 * Some drivers send the association event before the operup event--in
637 * this case, lifting operstate in wpa_driver_wext_set_operstate()
638 * fails. This will hit us when wpa_supplicant does not need to do
639 * IEEE 802.1X authentication
641 if (drv->operstate == 1 &&
642 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
643 !(ifi->ifi_flags & IFF_RUNNING))
644 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
648 attr = (struct rtattr *) buf;
650 rta_len = RTA_ALIGN(sizeof(struct rtattr));
651 while (RTA_OK(attr, attrlen)) {
652 if (attr->rta_type == IFLA_WIRELESS) {
653 wpa_driver_wext_event_wireless(
654 drv, ((char *) attr) + rta_len,
655 attr->rta_len - rta_len);
656 } else if (attr->rta_type == IFLA_IFNAME) {
657 wpa_driver_wext_event_link(drv,
658 ((char *) attr) + rta_len,
659 attr->rta_len - rta_len, 0);
661 attr = RTA_NEXT(attr, attrlen);
666 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
669 struct wpa_driver_wext_data *drv = ctx;
670 int attrlen, rta_len;
674 attr = (struct rtattr *) buf;
676 rta_len = RTA_ALIGN(sizeof(struct rtattr));
677 while (RTA_OK(attr, attrlen)) {
678 if (attr->rta_type == IFLA_IFNAME) {
679 wpa_driver_wext_event_link(drv,
680 ((char *) attr) + rta_len,
681 attr->rta_len - rta_len, 1);
683 attr = RTA_NEXT(attr, attrlen);
688 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
689 const char *ifname, int *flags)
693 os_memset(&ifr, 0, sizeof(ifr));
694 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
695 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
696 perror("ioctl[SIOCGIFFLAGS]");
699 *flags = ifr.ifr_flags & 0xffff;
705 * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
706 * @drv: driver_wext private data
707 * @flags: Pointer to returned flags value
708 * Returns: 0 on success, -1 on failure
710 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
712 return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
716 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
717 const char *ifname, int flags)
721 os_memset(&ifr, 0, sizeof(ifr));
722 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
723 ifr.ifr_flags = flags & 0xffff;
724 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
725 perror("SIOCSIFFLAGS");
733 * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
734 * @drv: driver_wext private data
735 * @flags: New value for flags
736 * Returns: 0 on success, -1 on failure
738 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
740 return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
745 * wpa_driver_wext_init - Initialize WE driver interface
746 * @ctx: context to be used when calling wpa_supplicant functions,
747 * e.g., wpa_supplicant_event()
748 * @ifname: interface name, e.g., wlan0
749 * Returns: Pointer to private data, %NULL on failure
751 void * wpa_driver_wext_init(void *ctx, const char *ifname)
753 struct wpa_driver_wext_data *drv;
754 struct netlink_config *cfg;
756 drv = os_zalloc(sizeof(*drv));
760 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
762 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
763 if (drv->ioctl_sock < 0) {
764 perror("socket(PF_INET,SOCK_DGRAM)");
768 cfg = os_zalloc(sizeof(*cfg));
772 cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
773 cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
774 drv->netlink = netlink_init(cfg);
775 if (drv->netlink == NULL) {
782 if (wpa_driver_wext_finish_drv_init(drv) < 0)
785 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
790 netlink_deinit(drv->netlink);
792 close(drv->ioctl_sock);
799 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
803 if (wpa_driver_wext_get_ifflags(drv, &flags) != 0) {
804 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
809 if (!(flags & IFF_UP)) {
810 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
811 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
816 * Wait some time to allow driver to initialize before
817 * starting configuring the driver. This seems to be
818 * needed at least some drivers that load firmware etc.
819 * when the interface is set up.
821 wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
822 "a second for the driver to complete "
823 "initialization", drv->ifname);
829 * Make sure that the driver does not have any obsolete PMKID entries.
831 wpa_driver_wext_flush_pmkid(drv);
833 if (wpa_driver_wext_set_mode(drv, 0) < 0) {
834 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
836 /* Try to use it anyway */
839 wpa_driver_wext_get_range(drv);
842 * Unlock the driver's BSSID and force to a random SSID to clear any
843 * previous association the driver might have when the supplicant
846 wpa_driver_wext_disconnect(drv);
848 drv->ifindex = if_nametoindex(drv->ifname);
850 if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
852 * Host AP driver may use both wlan# and wifi# interface in
853 * wireless events. Since some of the versions included WE-18
854 * support, let's add the alternative ifindex also from
855 * driver_wext.c for the time being. This may be removed at
856 * some point once it is believed that old versions of the
857 * driver are not in use anymore.
859 char ifname2[IFNAMSIZ + 1];
860 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
861 os_memcpy(ifname2, "wifi", 4);
862 wpa_driver_wext_alternative_ifindex(drv, ifname2);
865 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
873 * wpa_driver_wext_deinit - Deinitialize WE driver interface
874 * @priv: Pointer to private wext data from wpa_driver_wext_init()
876 * Shut down driver interface and processing of driver events. Free
877 * private data buffer if one was allocated in wpa_driver_wext_init().
879 void wpa_driver_wext_deinit(void *priv)
881 struct wpa_driver_wext_data *drv = priv;
884 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
886 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
889 * Clear possibly configured driver parameters in order to make it
890 * easier to use the driver after wpa_supplicant has been terminated.
892 wpa_driver_wext_disconnect(drv);
894 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
895 netlink_deinit(drv->netlink);
897 if (drv->mlme_sock >= 0)
898 eloop_unregister_read_sock(drv->mlme_sock);
900 if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
901 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
903 close(drv->ioctl_sock);
904 if (drv->mlme_sock >= 0)
905 close(drv->mlme_sock);
906 os_free(drv->assoc_req_ies);
907 os_free(drv->assoc_resp_ies);
913 * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
915 * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
917 * This function can be used as registered timeout when starting a scan to
918 * generate a scan completed event if the driver does not report this.
920 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
922 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
923 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
928 * wpa_driver_wext_scan - Request the driver to initiate scan
929 * @priv: Pointer to private wext data from wpa_driver_wext_init()
930 * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
931 * Returns: 0 on success, -1 on failure
933 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
935 struct wpa_driver_wext_data *drv = priv;
937 int ret = 0, timeout;
938 struct iw_scan_req req;
939 const u8 *ssid = params->ssids[0].ssid;
940 size_t ssid_len = params->ssids[0].ssid_len;
942 if (ssid_len > IW_ESSID_MAX_SIZE) {
943 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
944 __FUNCTION__, (unsigned long) ssid_len);
948 os_memset(&iwr, 0, sizeof(iwr));
949 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
951 if (ssid && ssid_len) {
952 os_memset(&req, 0, sizeof(req));
953 req.essid_len = ssid_len;
954 req.bssid.sa_family = ARPHRD_ETHER;
955 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
956 os_memcpy(req.essid, ssid, ssid_len);
957 iwr.u.data.pointer = (caddr_t) &req;
958 iwr.u.data.length = sizeof(req);
959 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
962 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
963 perror("ioctl[SIOCSIWSCAN]");
967 /* Not all drivers generate "scan completed" wireless event, so try to
968 * read results after a timeout. */
970 if (drv->scan_complete_events) {
972 * The driver seems to deliver SIOCGIWSCAN events to notify
973 * when scan is complete, so use longer timeout to avoid race
974 * conditions with scanning and following association request.
978 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
979 "seconds", ret, timeout);
980 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
981 eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
988 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
995 res_buf_len = IW_SCAN_MAX_DATA;
997 res_buf = os_malloc(res_buf_len);
1000 os_memset(&iwr, 0, sizeof(iwr));
1001 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1002 iwr.u.data.pointer = res_buf;
1003 iwr.u.data.length = res_buf_len;
1005 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1008 if (errno == E2BIG && res_buf_len < 65535) {
1012 if (res_buf_len > 65535)
1013 res_buf_len = 65535; /* 16-bit length field */
1014 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1015 "trying larger buffer (%lu bytes)",
1016 (unsigned long) res_buf_len);
1018 perror("ioctl[SIOCGIWSCAN]");
1024 if (iwr.u.data.length > res_buf_len) {
1028 *len = iwr.u.data.length;
1035 * Data structure for collecting WEXT scan results. This is needed to allow
1036 * the various methods of reporting IEs to be combined into a single IE buffer.
1038 struct wext_scan_data {
1039 struct wpa_scan_res res;
1048 static void wext_get_scan_mode(struct iw_event *iwe,
1049 struct wext_scan_data *res)
1051 if (iwe->u.mode == IW_MODE_ADHOC)
1052 res->res.caps |= IEEE80211_CAP_IBSS;
1053 else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1054 res->res.caps |= IEEE80211_CAP_ESS;
1058 static void wext_get_scan_ssid(struct iw_event *iwe,
1059 struct wext_scan_data *res, char *custom,
1062 int ssid_len = iwe->u.essid.length;
1063 if (custom + ssid_len > end)
1065 if (iwe->u.essid.flags &&
1067 ssid_len <= IW_ESSID_MAX_SIZE) {
1068 os_memcpy(res->ssid, custom, ssid_len);
1069 res->ssid_len = ssid_len;
1074 static void wext_get_scan_freq(struct iw_event *iwe,
1075 struct wext_scan_data *res)
1077 int divi = 1000000, i;
1079 if (iwe->u.freq.e == 0) {
1081 * Some drivers do not report frequency, but a channel.
1082 * Try to map this to frequency by assuming they are using
1083 * IEEE 802.11b/g. But don't overwrite a previously parsed
1084 * frequency if the driver sends both frequency and channel,
1085 * since the driver may be sending an A-band channel that we
1086 * don't handle here.
1092 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1093 res->res.freq = 2407 + 5 * iwe->u.freq.m;
1095 } else if (iwe->u.freq.m == 14) {
1096 res->res.freq = 2484;
1101 if (iwe->u.freq.e > 6) {
1102 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1103 MACSTR " m=%d e=%d)",
1104 MAC2STR(res->res.bssid), iwe->u.freq.m,
1109 for (i = 0; i < iwe->u.freq.e; i++)
1111 res->res.freq = iwe->u.freq.m / divi;
1115 static void wext_get_scan_qual(struct iw_event *iwe,
1116 struct wext_scan_data *res)
1118 res->res.qual = iwe->u.qual.qual;
1119 res->res.noise = iwe->u.qual.noise;
1120 res->res.level = iwe->u.qual.level;
1121 if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1122 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1123 if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1124 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1125 if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1126 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1127 if (iwe->u.qual.updated & IW_QUAL_DBM)
1128 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1132 static void wext_get_scan_encode(struct iw_event *iwe,
1133 struct wext_scan_data *res)
1135 if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1136 res->res.caps |= IEEE80211_CAP_PRIVACY;
1140 static void wext_get_scan_rate(struct iw_event *iwe,
1141 struct wext_scan_data *res, char *pos,
1145 char *custom = pos + IW_EV_LCP_LEN;
1150 if (custom + clen > end)
1153 while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1154 /* Note: may be misaligned, make a local, aligned copy */
1155 os_memcpy(&p, custom, sizeof(struct iw_param));
1156 if (p.value > maxrate)
1158 clen -= sizeof(struct iw_param);
1159 custom += sizeof(struct iw_param);
1162 /* Convert the maxrate from WE-style (b/s units) to
1163 * 802.11 rates (500000 b/s units).
1165 res->maxrate = maxrate / 500000;
1169 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1170 struct wext_scan_data *res, char *custom,
1173 char *genie, *gpos, *gend;
1176 if (iwe->u.data.length == 0)
1179 gpos = genie = custom;
1180 gend = genie + iwe->u.data.length;
1182 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1186 tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1189 os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1191 res->ie_len += gend - gpos;
1195 static void wext_get_scan_custom(struct iw_event *iwe,
1196 struct wext_scan_data *res, char *custom,
1202 clen = iwe->u.data.length;
1203 if (custom + clen > end)
1206 if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1210 bytes = custom + clen - spos;
1211 if (bytes & 1 || bytes == 0)
1214 tmp = os_realloc(res->ie, res->ie_len + bytes);
1217 hexstr2bin(spos, tmp + res->ie_len, bytes);
1219 res->ie_len += bytes;
1220 } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1224 bytes = custom + clen - spos;
1225 if (bytes & 1 || bytes == 0)
1228 tmp = os_realloc(res->ie, res->ie_len + bytes);
1231 hexstr2bin(spos, tmp + res->ie_len, bytes);
1233 res->ie_len += bytes;
1234 } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1239 bytes = custom + clen - spos;
1241 wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1245 hexstr2bin(spos, bin, bytes);
1246 res->res.tsf += WPA_GET_BE64(bin);
1251 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1253 return drv->we_version_compiled > 18 &&
1254 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1255 cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1259 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1260 struct wext_scan_data *data)
1262 struct wpa_scan_res **tmp;
1263 struct wpa_scan_res *r;
1265 u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1267 /* Figure out whether we need to fake any IEs */
1269 end = pos + data->ie_len;
1270 while (pos && pos + 1 < end) {
1271 if (pos + 2 + pos[1] > end)
1273 if (pos[0] == WLAN_EID_SSID)
1275 else if (pos[0] == WLAN_EID_SUPP_RATES)
1277 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1283 if (ssid_ie == NULL)
1284 extra_len += 2 + data->ssid_len;
1285 if (rate_ie == NULL && data->maxrate)
1288 r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1291 os_memcpy(r, &data->res, sizeof(*r));
1292 r->ie_len = extra_len + data->ie_len;
1293 pos = (u8 *) (r + 1);
1294 if (ssid_ie == NULL) {
1296 * Generate a fake SSID IE since the driver did not report
1299 *pos++ = WLAN_EID_SSID;
1300 *pos++ = data->ssid_len;
1301 os_memcpy(pos, data->ssid, data->ssid_len);
1302 pos += data->ssid_len;
1304 if (rate_ie == NULL && data->maxrate) {
1306 * Generate a fake Supported Rates IE since the driver did not
1307 * report a full IE list.
1309 *pos++ = WLAN_EID_SUPP_RATES;
1311 *pos++ = data->maxrate;
1314 os_memcpy(pos, data->ie, data->ie_len);
1316 tmp = os_realloc(res->res,
1317 (res->num + 1) * sizeof(struct wpa_scan_res *));
1322 tmp[res->num++] = r;
1328 * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1329 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1330 * Returns: Scan results on success, -1 on failure
1332 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1334 struct wpa_driver_wext_data *drv = priv;
1335 size_t ap_num = 0, len;
1338 struct iw_event iwe_buf, *iwe = &iwe_buf;
1339 char *pos, *end, *custom;
1340 struct wpa_scan_results *res;
1341 struct wext_scan_data data;
1343 res_buf = wpa_driver_wext_giwscan(drv, &len);
1344 if (res_buf == NULL)
1350 res = os_zalloc(sizeof(*res));
1356 pos = (char *) res_buf;
1357 end = (char *) res_buf + len;
1358 os_memset(&data, 0, sizeof(data));
1360 while (pos + IW_EV_LCP_LEN <= end) {
1361 /* Event data may be unaligned, so make a local, aligned copy
1362 * before processing. */
1363 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1364 if (iwe->len <= IW_EV_LCP_LEN)
1367 custom = pos + IW_EV_POINT_LEN;
1368 if (wext_19_iw_point(drv, iwe->cmd)) {
1369 /* WE-19 removed the pointer from struct iw_point */
1370 char *dpos = (char *) &iwe_buf.u.data.length;
1371 int dlen = dpos - (char *) &iwe_buf;
1372 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1373 sizeof(struct iw_event) - dlen);
1375 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1376 custom += IW_EV_POINT_OFF;
1382 wpa_driver_wext_add_scan_entry(res, &data);
1385 os_memset(&data, 0, sizeof(data));
1386 os_memcpy(data.res.bssid,
1387 iwe->u.ap_addr.sa_data, ETH_ALEN);
1390 wext_get_scan_mode(iwe, &data);
1393 wext_get_scan_ssid(iwe, &data, custom, end);
1396 wext_get_scan_freq(iwe, &data);
1399 wext_get_scan_qual(iwe, &data);
1402 wext_get_scan_encode(iwe, &data);
1405 wext_get_scan_rate(iwe, &data, pos, end);
1408 wext_get_scan_iwevgenie(iwe, &data, custom, end);
1411 wext_get_scan_custom(iwe, &data, custom, end);
1420 wpa_driver_wext_add_scan_entry(res, &data);
1423 wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1424 (unsigned long) len, (unsigned long) res->num);
1430 static int wpa_driver_wext_get_range(void *priv)
1432 struct wpa_driver_wext_data *drv = priv;
1433 struct iw_range *range;
1439 * Use larger buffer than struct iw_range in order to allow the
1440 * structure to grow in the future.
1442 buflen = sizeof(struct iw_range) + 500;
1443 range = os_zalloc(buflen);
1447 os_memset(&iwr, 0, sizeof(iwr));
1448 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1449 iwr.u.data.pointer = (caddr_t) range;
1450 iwr.u.data.length = buflen;
1452 minlen = ((char *) &range->enc_capa) - (char *) range +
1453 sizeof(range->enc_capa);
1455 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1456 perror("ioctl[SIOCGIWRANGE]");
1459 } else if (iwr.u.data.length >= minlen &&
1460 range->we_version_compiled >= 18) {
1461 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1462 "WE(source)=%d enc_capa=0x%x",
1463 range->we_version_compiled,
1464 range->we_version_source,
1466 drv->has_capability = 1;
1467 drv->we_version_compiled = range->we_version_compiled;
1468 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1469 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1470 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1472 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1473 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1474 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1476 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1477 WPA_DRIVER_CAPA_ENC_WEP104;
1478 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1479 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1480 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1481 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1482 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1483 drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1484 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1485 WPA_DRIVER_AUTH_SHARED |
1486 WPA_DRIVER_AUTH_LEAP;
1487 drv->capa.max_scan_ssids = 1;
1489 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x "
1491 drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1493 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1494 "assuming WPA is not supported");
1502 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1505 struct iw_encode_ext *ext;
1509 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1511 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1517 os_memset(&iwr, 0, sizeof(iwr));
1518 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1520 ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1524 iwr.u.encoding.pointer = (caddr_t) ext;
1525 iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1526 ext->key_len = PMK_LEN;
1527 os_memcpy(&ext->key, psk, ext->key_len);
1528 ext->alg = IW_ENCODE_ALG_PMK;
1530 ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1532 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1539 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1540 const u8 *addr, int key_idx,
1541 int set_tx, const u8 *seq,
1543 const u8 *key, size_t key_len)
1545 struct wpa_driver_wext_data *drv = priv;
1548 struct iw_encode_ext *ext;
1550 if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1551 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1552 __FUNCTION__, (unsigned long) seq_len);
1556 ext = os_zalloc(sizeof(*ext) + key_len);
1559 os_memset(&iwr, 0, sizeof(iwr));
1560 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1561 iwr.u.encoding.flags = key_idx + 1;
1562 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1563 if (alg == WPA_ALG_NONE)
1564 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1565 iwr.u.encoding.pointer = (caddr_t) ext;
1566 iwr.u.encoding.length = sizeof(*ext) + key_len;
1569 os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1570 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1572 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1574 ext->addr.sa_family = ARPHRD_ETHER;
1576 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1578 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1579 if (key && key_len) {
1580 os_memcpy(ext + 1, key, key_len);
1581 ext->key_len = key_len;
1585 ext->alg = IW_ENCODE_ALG_NONE;
1588 ext->alg = IW_ENCODE_ALG_WEP;
1591 ext->alg = IW_ENCODE_ALG_TKIP;
1594 ext->alg = IW_ENCODE_ALG_CCMP;
1597 ext->alg = IW_ENCODE_ALG_PMK;
1599 #ifdef CONFIG_IEEE80211W
1601 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1603 #endif /* CONFIG_IEEE80211W */
1605 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1611 if (seq && seq_len) {
1612 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1613 os_memcpy(ext->rx_seq, seq, seq_len);
1616 if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1617 ret = errno == EOPNOTSUPP ? -2 : -1;
1618 if (errno == ENODEV) {
1620 * ndiswrapper seems to be returning incorrect error
1625 perror("ioctl[SIOCSIWENCODEEXT]");
1634 * wpa_driver_wext_set_key - Configure encryption key
1635 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1636 * @priv: Private driver interface data
1637 * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1638 * %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1639 * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1640 * broadcast/default keys
1641 * @key_idx: key index (0..3), usually 0 for unicast keys
1642 * @set_tx: Configure this key as the default Tx key (only used when
1643 * driver does not support separate unicast/individual key
1644 * @seq: Sequence number/packet number, seq_len octets, the next
1645 * packet number to be used for in replay protection; configured
1646 * for Rx keys (in most cases, this is only used with broadcast
1647 * keys and set to zero for unicast keys)
1648 * @seq_len: Length of the seq, depends on the algorithm:
1649 * TKIP: 6 octets, CCMP: 6 octets
1650 * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1652 * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1653 * TKIP: 32, CCMP: 16)
1654 * Returns: 0 on success, -1 on failure
1656 * This function uses SIOCSIWENCODEEXT by default, but tries to use
1657 * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1659 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1660 const u8 *addr, int key_idx,
1661 int set_tx, const u8 *seq, size_t seq_len,
1662 const u8 *key, size_t key_len)
1664 struct wpa_driver_wext_data *drv = priv;
1668 wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1670 __FUNCTION__, alg, key_idx, set_tx,
1671 (unsigned long) seq_len, (unsigned long) key_len);
1673 ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1674 seq, seq_len, key, key_len);
1679 (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1680 wpa_printf(MSG_DEBUG, "Driver did not support "
1681 "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1684 wpa_printf(MSG_DEBUG, "Driver did not support "
1685 "SIOCSIWENCODEEXT");
1689 os_memset(&iwr, 0, sizeof(iwr));
1690 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1691 iwr.u.encoding.flags = key_idx + 1;
1692 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1693 if (alg == WPA_ALG_NONE)
1694 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1695 iwr.u.encoding.pointer = (caddr_t) key;
1696 iwr.u.encoding.length = key_len;
1698 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1699 perror("ioctl[SIOCSIWENCODE]");
1703 if (set_tx && alg != WPA_ALG_NONE) {
1704 os_memset(&iwr, 0, sizeof(iwr));
1705 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1706 iwr.u.encoding.flags = key_idx + 1;
1707 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1708 iwr.u.encoding.pointer = (caddr_t) NULL;
1709 iwr.u.encoding.length = 0;
1710 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1711 perror("ioctl[SIOCSIWENCODE] (set_tx)");
1720 static int wpa_driver_wext_set_countermeasures(void *priv,
1723 struct wpa_driver_wext_data *drv = priv;
1724 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1725 return wpa_driver_wext_set_auth_param(drv,
1726 IW_AUTH_TKIP_COUNTERMEASURES,
1731 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1734 struct wpa_driver_wext_data *drv = priv;
1735 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1736 drv->use_crypt = enabled;
1737 return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1742 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1743 const u8 *addr, int cmd, int reason_code)
1746 struct iw_mlme mlme;
1749 os_memset(&iwr, 0, sizeof(iwr));
1750 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1751 os_memset(&mlme, 0, sizeof(mlme));
1753 mlme.reason_code = reason_code;
1754 mlme.addr.sa_family = ARPHRD_ETHER;
1755 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1756 iwr.u.data.pointer = (caddr_t) &mlme;
1757 iwr.u.data.length = sizeof(mlme);
1759 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1760 perror("ioctl[SIOCSIWMLME]");
1768 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1771 const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1776 * Only force-disconnect when the card is in infrastructure mode,
1777 * otherwise the driver might interpret the cleared BSSID and random
1778 * SSID as an attempt to create a new ad-hoc network.
1780 os_memset(&iwr, 0, sizeof(iwr));
1781 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1782 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1783 perror("ioctl[SIOCGIWMODE]");
1784 iwr.u.mode = IW_MODE_INFRA;
1787 if (iwr.u.mode == IW_MODE_INFRA) {
1789 * Clear the BSSID selection and set a random SSID to make sure
1790 * the driver will not be trying to associate with something
1791 * even if it does not understand SIOCSIWMLME commands (or
1792 * tries to associate automatically after deauth/disassoc).
1794 wpa_driver_wext_set_bssid(drv, null_bssid);
1796 for (i = 0; i < 32; i++)
1797 ssid[i] = rand() & 0xFF;
1798 wpa_driver_wext_set_ssid(drv, ssid, 32);
1803 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1806 struct wpa_driver_wext_data *drv = priv;
1808 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1809 ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1810 wpa_driver_wext_disconnect(drv);
1815 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1818 struct wpa_driver_wext_data *drv = priv;
1820 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1821 ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
1822 wpa_driver_wext_disconnect(drv);
1827 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1830 struct wpa_driver_wext_data *drv = priv;
1834 os_memset(&iwr, 0, sizeof(iwr));
1835 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1836 iwr.u.data.pointer = (caddr_t) ie;
1837 iwr.u.data.length = ie_len;
1839 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1840 perror("ioctl[SIOCSIWGENIE]");
1848 int wpa_driver_wext_cipher2wext(int cipher)
1852 return IW_AUTH_CIPHER_NONE;
1854 return IW_AUTH_CIPHER_WEP40;
1856 return IW_AUTH_CIPHER_TKIP;
1858 return IW_AUTH_CIPHER_CCMP;
1860 return IW_AUTH_CIPHER_WEP104;
1867 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1870 case KEY_MGMT_802_1X:
1871 case KEY_MGMT_802_1X_NO_WPA:
1872 return IW_AUTH_KEY_MGMT_802_1X;
1874 return IW_AUTH_KEY_MGMT_PSK;
1882 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1883 struct wpa_driver_associate_params *params)
1888 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1889 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1891 os_memset(&iwr, 0, sizeof(iwr));
1892 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1893 /* Just changing mode, not actual keys */
1894 iwr.u.encoding.flags = 0;
1895 iwr.u.encoding.pointer = (caddr_t) NULL;
1896 iwr.u.encoding.length = 0;
1899 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1900 * different things. Here they are used to indicate Open System vs.
1901 * Shared Key authentication algorithm. However, some drivers may use
1902 * them to select between open/restricted WEP encrypted (open = allow
1903 * both unencrypted and encrypted frames; restricted = only allow
1904 * encrypted frames).
1907 if (!drv->use_crypt) {
1908 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1910 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
1911 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1912 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
1913 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1916 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1917 perror("ioctl[SIOCSIWENCODE]");
1925 int wpa_driver_wext_associate(void *priv,
1926 struct wpa_driver_associate_params *params)
1928 struct wpa_driver_wext_data *drv = priv;
1930 int allow_unencrypted_eapol;
1933 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1935 if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
1938 if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
1940 if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
1944 * If the driver did not support SIOCSIWAUTH, fallback to
1945 * SIOCSIWENCODE here.
1947 if (drv->auth_alg_fallback &&
1948 wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
1951 if (!params->bssid &&
1952 wpa_driver_wext_set_bssid(drv, NULL) < 0)
1955 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1956 * from configuration, not from here, where only the selected suite is
1958 if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1961 if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1962 value = IW_AUTH_WPA_VERSION_DISABLED;
1963 else if (params->wpa_ie[0] == WLAN_EID_RSN)
1964 value = IW_AUTH_WPA_VERSION_WPA2;
1966 value = IW_AUTH_WPA_VERSION_WPA;
1967 if (wpa_driver_wext_set_auth_param(drv,
1968 IW_AUTH_WPA_VERSION, value) < 0)
1970 value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
1971 if (wpa_driver_wext_set_auth_param(drv,
1972 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1974 value = wpa_driver_wext_cipher2wext(params->group_suite);
1975 if (wpa_driver_wext_set_auth_param(drv,
1976 IW_AUTH_CIPHER_GROUP, value) < 0)
1978 value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
1979 if (wpa_driver_wext_set_auth_param(drv,
1980 IW_AUTH_KEY_MGMT, value) < 0)
1982 value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1983 params->pairwise_suite != CIPHER_NONE ||
1984 params->group_suite != CIPHER_NONE ||
1986 if (wpa_driver_wext_set_auth_param(drv,
1987 IW_AUTH_PRIVACY_INVOKED, value) < 0)
1990 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1991 * not using WPA. IEEE 802.1X specifies that these frames are not
1992 * encrypted, but WPA encrypts them when pairwise keys are in use. */
1993 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1994 params->key_mgmt_suite == KEY_MGMT_PSK)
1995 allow_unencrypted_eapol = 0;
1997 allow_unencrypted_eapol = 1;
1999 if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2001 if (wpa_driver_wext_set_auth_param(drv,
2002 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2003 allow_unencrypted_eapol) < 0)
2005 #ifdef CONFIG_IEEE80211W
2006 switch (params->mgmt_frame_protection) {
2007 case NO_MGMT_FRAME_PROTECTION:
2008 value = IW_AUTH_MFP_DISABLED;
2010 case MGMT_FRAME_PROTECTION_OPTIONAL:
2011 value = IW_AUTH_MFP_OPTIONAL;
2013 case MGMT_FRAME_PROTECTION_REQUIRED:
2014 value = IW_AUTH_MFP_REQUIRED;
2017 if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2019 #endif /* CONFIG_IEEE80211W */
2020 if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2022 if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2024 if (params->bssid &&
2025 wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2032 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2034 struct wpa_driver_wext_data *drv = priv;
2037 if (auth_alg & WPA_AUTH_ALG_OPEN)
2038 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2039 if (auth_alg & WPA_AUTH_ALG_SHARED)
2040 algs |= IW_AUTH_ALG_SHARED_KEY;
2041 if (auth_alg & WPA_AUTH_ALG_LEAP)
2042 algs |= IW_AUTH_ALG_LEAP;
2044 /* at least one algorithm should be set */
2045 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2048 res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2050 drv->auth_alg_fallback = res == -2;
2056 * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2057 * @priv: Pointer to private wext data from wpa_driver_wext_init()
2058 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2059 * Returns: 0 on success, -1 on failure
2061 int wpa_driver_wext_set_mode(void *priv, int mode)
2063 struct wpa_driver_wext_data *drv = priv;
2065 int ret = -1, flags;
2066 unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2068 os_memset(&iwr, 0, sizeof(iwr));
2069 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2070 iwr.u.mode = new_mode;
2071 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2076 if (errno != EBUSY) {
2077 perror("ioctl[SIOCSIWMODE]");
2081 /* mac80211 doesn't allow mode changes while the device is up, so if
2082 * the device isn't in the mode we're about to change to, take device
2083 * down, try to set the mode again, and bring it back up.
2085 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2086 perror("ioctl[SIOCGIWMODE]");
2090 if (iwr.u.mode == new_mode) {
2095 if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2096 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2098 /* Try to set the mode again while the interface is down */
2099 iwr.u.mode = new_mode;
2100 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2101 perror("ioctl[SIOCSIWMODE]");
2105 /* Ignore return value of get_ifflags to ensure that the device
2106 * is always up like it was before this function was called.
2108 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2109 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2117 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2118 u32 cmd, const u8 *bssid, const u8 *pmkid)
2121 struct iw_pmksa pmksa;
2124 os_memset(&iwr, 0, sizeof(iwr));
2125 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2126 os_memset(&pmksa, 0, sizeof(pmksa));
2128 pmksa.bssid.sa_family = ARPHRD_ETHER;
2130 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2132 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2133 iwr.u.data.pointer = (caddr_t) &pmksa;
2134 iwr.u.data.length = sizeof(pmksa);
2136 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2137 if (errno != EOPNOTSUPP)
2138 perror("ioctl[SIOCSIWPMKSA]");
2146 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2149 struct wpa_driver_wext_data *drv = priv;
2150 return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2154 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2157 struct wpa_driver_wext_data *drv = priv;
2158 return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2162 static int wpa_driver_wext_flush_pmkid(void *priv)
2164 struct wpa_driver_wext_data *drv = priv;
2165 return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2169 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2171 struct wpa_driver_wext_data *drv = priv;
2172 if (!drv->has_capability)
2174 os_memcpy(capa, &drv->capa, sizeof(*capa));
2179 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2182 if (ifname == NULL) {
2187 drv->ifindex2 = if_nametoindex(ifname);
2188 if (drv->ifindex2 <= 0)
2191 wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2192 "wireless events", drv->ifindex2, ifname);
2198 int wpa_driver_wext_set_operstate(void *priv, int state)
2200 struct wpa_driver_wext_data *drv = priv;
2202 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2203 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2204 drv->operstate = state;
2205 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2206 state ? IF_OPER_UP : IF_OPER_DORMANT);
2210 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2212 return drv->we_version_compiled;
2216 const struct wpa_driver_ops wpa_driver_wext_ops = {
2218 .desc = "Linux wireless extensions (generic)",
2219 .get_bssid = wpa_driver_wext_get_bssid,
2220 .get_ssid = wpa_driver_wext_get_ssid,
2221 .set_key = wpa_driver_wext_set_key,
2222 .set_countermeasures = wpa_driver_wext_set_countermeasures,
2223 .scan2 = wpa_driver_wext_scan,
2224 .get_scan_results2 = wpa_driver_wext_get_scan_results,
2225 .deauthenticate = wpa_driver_wext_deauthenticate,
2226 .disassociate = wpa_driver_wext_disassociate,
2227 .associate = wpa_driver_wext_associate,
2228 .init = wpa_driver_wext_init,
2229 .deinit = wpa_driver_wext_deinit,
2230 .add_pmkid = wpa_driver_wext_add_pmkid,
2231 .remove_pmkid = wpa_driver_wext_remove_pmkid,
2232 .flush_pmkid = wpa_driver_wext_flush_pmkid,
2233 .get_capa = wpa_driver_wext_get_capa,
2234 .set_operstate = wpa_driver_wext_set_operstate,