2 * WPA Supplicant - driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2003-2008, 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.
16 #include <sys/ioctl.h>
17 #include <net/if_arp.h>
18 #include <netlink/genl/genl.h>
19 #include <netlink/genl/family.h>
20 #include <netlink/genl/ctrl.h>
21 #include "nl80211_copy.h"
22 #ifdef CONFIG_CLIENT_MLME
23 #include <netpacket/packet.h>
24 #include <linux/if_ether.h>
26 #include "radiotap_iter.h"
27 #endif /* CONFIG_CLIENT_MLME */
29 #include "wireless_copy.h"
33 #include "ieee802_11_defs.h"
36 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
39 #define IFF_DORMANT 0x20000 /* driver signals dormant */
42 #ifndef IF_OPER_DORMANT
43 #define IF_OPER_DORMANT 5
50 struct wpa_driver_nl80211_data {
54 char ifname[IFNAMSIZ + 1];
58 size_t assoc_req_ies_len;
60 size_t assoc_resp_ies_len;
61 struct wpa_driver_capa capa;
63 int we_version_compiled;
65 /* for set_auth_alg fallback */
67 int auth_alg_fallback;
71 char mlmedev[IFNAMSIZ + 1];
73 int scan_complete_events;
75 struct nl_handle *nl_handle;
76 struct nl_cache *nl_cache;
78 struct genl_family *nl80211;
80 #ifdef CONFIG_CLIENT_MLME
81 int monitor_sock; /* socket for monitor */
83 #endif /* CONFIG_CLIENT_MLME */
87 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
89 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
90 static int wpa_driver_nl80211_flush_pmkid(void *priv);
91 static int wpa_driver_nl80211_get_range(void *priv);
93 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
97 static int ack_handler(struct nl_msg *msg, void *arg)
104 static int finish_handler(struct nl_msg *msg, void *arg)
111 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
119 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
121 int (*valid_handler)(struct nl_msg *, void *),
127 cb = nl_cb_clone(drv->nl_cb);
131 err = nl_send_auto_complete(drv->nl_handle, msg);
137 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
138 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
139 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
142 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
143 valid_handler, valid_data);
146 nl_recvmsgs(drv->nl_handle, cb);
160 static int family_handler(struct nl_msg *msg, void *arg)
162 struct family_data *res = arg;
163 struct nlattr *tb[CTRL_ATTR_MAX + 1];
164 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
165 struct nlattr *mcgrp;
168 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
169 genlmsg_attrlen(gnlh, 0), NULL);
170 if (!tb[CTRL_ATTR_MCAST_GROUPS])
173 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
174 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
175 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
176 nla_len(mcgrp), NULL);
177 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
178 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
179 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
181 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
183 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
191 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
192 const char *family, const char *group)
196 struct family_data res = { group, -ENOENT };
201 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
202 0, 0, CTRL_CMD_GETFAMILY, 0);
203 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
205 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
216 static int wpa_driver_nl80211_send_oper_ifla(
217 struct wpa_driver_nl80211_data *drv,
218 int linkmode, int operstate)
222 struct ifinfomsg ifinfo;
229 os_memset(&req, 0, sizeof(req));
231 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
232 req.hdr.nlmsg_type = RTM_SETLINK;
233 req.hdr.nlmsg_flags = NLM_F_REQUEST;
234 req.hdr.nlmsg_seq = ++nl_seq;
235 req.hdr.nlmsg_pid = 0;
237 req.ifinfo.ifi_family = AF_UNSPEC;
238 req.ifinfo.ifi_type = 0;
239 req.ifinfo.ifi_index = drv->ifindex;
240 req.ifinfo.ifi_flags = 0;
241 req.ifinfo.ifi_change = 0;
243 if (linkmode != -1) {
244 rta = (struct rtattr *)
245 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
246 rta->rta_type = IFLA_LINKMODE;
247 rta->rta_len = RTA_LENGTH(sizeof(char));
248 *((char *) RTA_DATA(rta)) = linkmode;
249 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
250 RTA_LENGTH(sizeof(char));
252 if (operstate != -1) {
253 rta = (struct rtattr *)
254 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
255 rta->rta_type = IFLA_OPERSTATE;
256 rta->rta_len = RTA_LENGTH(sizeof(char));
257 *((char *) RTA_DATA(rta)) = operstate;
258 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
259 RTA_LENGTH(sizeof(char));
262 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
263 linkmode, operstate);
265 ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
267 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
268 "%s (assume operstate is not supported)",
272 return ret < 0 ? -1 : 0;
276 static int wpa_driver_nl80211_set_auth_param(
277 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
282 os_memset(&iwr, 0, sizeof(iwr));
283 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
284 iwr.u.param.flags = idx & IW_AUTH_INDEX;
285 iwr.u.param.value = value;
287 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
288 if (errno != EOPNOTSUPP) {
289 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
290 "value 0x%x) failed: %s)",
291 idx, value, strerror(errno));
293 ret = errno == EOPNOTSUPP ? -2 : -1;
300 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
302 struct wpa_driver_nl80211_data *drv = priv;
306 os_memset(&iwr, 0, sizeof(iwr));
307 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
309 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
310 perror("ioctl[SIOCGIWAP]");
313 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
319 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
321 struct wpa_driver_nl80211_data *drv = priv;
325 os_memset(&iwr, 0, sizeof(iwr));
326 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
327 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
329 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
331 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
333 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
334 perror("ioctl[SIOCSIWAP]");
342 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
344 struct wpa_driver_nl80211_data *drv = priv;
348 os_memset(&iwr, 0, sizeof(iwr));
349 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
350 iwr.u.essid.pointer = (caddr_t) ssid;
351 iwr.u.essid.length = 32;
353 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
354 perror("ioctl[SIOCGIWESSID]");
357 ret = iwr.u.essid.length;
360 /* Some drivers include nul termination in the SSID, so let's
361 * remove it here before further processing. WE-21 changes this
362 * to explicitly require the length _not_ to include nul
364 if (ret > 0 && ssid[ret - 1] == '\0' &&
365 drv->we_version_compiled < 21)
373 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
376 struct wpa_driver_nl80211_data *drv = priv;
384 os_memset(&iwr, 0, sizeof(iwr));
385 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
386 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
387 iwr.u.essid.flags = (ssid_len != 0);
388 os_memset(buf, 0, sizeof(buf));
389 os_memcpy(buf, ssid, ssid_len);
390 iwr.u.essid.pointer = (caddr_t) buf;
391 if (drv->we_version_compiled < 21) {
392 /* For historic reasons, set SSID length to include one extra
393 * character, C string nul termination, even though SSID is
394 * really an octet string that should not be presented as a C
395 * string. Some Linux drivers decrement the length by one and
396 * can thus end up missing the last octet of the SSID if the
397 * length is not incremented here. WE-21 changes this to
398 * explicitly require the length _not_ to include nul
403 iwr.u.essid.length = ssid_len;
405 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
406 perror("ioctl[SIOCSIWESSID]");
414 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
416 struct wpa_driver_nl80211_data *drv = priv;
420 os_memset(&iwr, 0, sizeof(iwr));
421 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
422 iwr.u.freq.m = freq * 100000;
425 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
426 perror("ioctl[SIOCSIWFREQ]");
435 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
437 union wpa_event_data data;
439 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
442 os_memset(&data, 0, sizeof(data));
444 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
445 data.michael_mic_failure.unicast =
446 os_strstr(custom, " unicast ") != NULL;
447 /* TODO: parse parameters(?) */
448 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
449 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
455 bytes = strspn(spos, "0123456789abcdefABCDEF");
456 if (!bytes || (bytes & 1))
460 data.assoc_info.req_ies = os_malloc(bytes);
461 if (data.assoc_info.req_ies == NULL)
464 data.assoc_info.req_ies_len = bytes;
465 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
469 data.assoc_info.resp_ies = NULL;
470 data.assoc_info.resp_ies_len = 0;
472 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
475 bytes = strspn(spos, "0123456789abcdefABCDEF");
476 if (!bytes || (bytes & 1))
480 data.assoc_info.resp_ies = os_malloc(bytes);
481 if (data.assoc_info.resp_ies == NULL)
484 data.assoc_info.resp_ies_len = bytes;
485 hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
488 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
491 os_free(data.assoc_info.resp_ies);
492 os_free(data.assoc_info.req_ies);
493 #ifdef CONFIG_PEERKEY
494 } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
495 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
496 wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
497 "STKSTART.request '%s'", custom + 17);
500 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
501 #endif /* CONFIG_PEERKEY */
506 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
507 void *ctx, const char *ev, size_t len)
509 const struct iw_michaelmicfailure *mic;
510 union wpa_event_data data;
512 if (len < sizeof(*mic))
515 mic = (const struct iw_michaelmicfailure *) ev;
517 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
518 "flags=0x%x src_addr=" MACSTR, mic->flags,
519 MAC2STR(mic->src_addr.sa_data));
521 os_memset(&data, 0, sizeof(data));
522 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
523 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
529 static int wpa_driver_nl80211_event_wireless_pmkidcand(
530 struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
532 const struct iw_pmkid_cand *cand;
533 union wpa_event_data data;
536 if (len < sizeof(*cand))
539 cand = (const struct iw_pmkid_cand *) ev;
540 addr = (const u8 *) cand->bssid.sa_data;
542 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
543 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
544 cand->index, MAC2STR(addr));
546 os_memset(&data, 0, sizeof(data));
547 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
548 data.pmkid_candidate.index = cand->index;
549 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
550 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
556 static int wpa_driver_nl80211_event_wireless_assocreqie(
557 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
562 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
564 os_free(drv->assoc_req_ies);
565 drv->assoc_req_ies = os_malloc(len);
566 if (drv->assoc_req_ies == NULL) {
567 drv->assoc_req_ies_len = 0;
570 os_memcpy(drv->assoc_req_ies, ev, len);
571 drv->assoc_req_ies_len = len;
577 static int wpa_driver_nl80211_event_wireless_assocrespie(
578 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
583 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
585 os_free(drv->assoc_resp_ies);
586 drv->assoc_resp_ies = os_malloc(len);
587 if (drv->assoc_resp_ies == NULL) {
588 drv->assoc_resp_ies_len = 0;
591 os_memcpy(drv->assoc_resp_ies, ev, len);
592 drv->assoc_resp_ies_len = len;
598 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
600 union wpa_event_data data;
602 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
605 os_memset(&data, 0, sizeof(data));
606 if (drv->assoc_req_ies) {
607 data.assoc_info.req_ies = drv->assoc_req_ies;
608 drv->assoc_req_ies = NULL;
609 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
611 if (drv->assoc_resp_ies) {
612 data.assoc_info.resp_ies = drv->assoc_resp_ies;
613 drv->assoc_resp_ies = NULL;
614 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
617 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
619 os_free(data.assoc_info.req_ies);
620 os_free(data.assoc_info.resp_ies);
624 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
625 void *ctx, char *data, int len)
627 struct iw_event iwe_buf, *iwe = &iwe_buf;
628 char *pos, *end, *custom, *buf;
633 while (pos + IW_EV_LCP_LEN <= end) {
634 /* Event data may be unaligned, so make a local, aligned copy
635 * before processing. */
636 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
637 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
639 if (iwe->len <= IW_EV_LCP_LEN)
642 custom = pos + IW_EV_POINT_LEN;
643 if (drv->we_version_compiled > 18 &&
644 (iwe->cmd == IWEVMICHAELMICFAILURE ||
645 iwe->cmd == IWEVCUSTOM ||
646 iwe->cmd == IWEVASSOCREQIE ||
647 iwe->cmd == IWEVASSOCRESPIE ||
648 iwe->cmd == IWEVPMKIDCAND)) {
649 /* WE-19 removed the pointer from struct iw_point */
650 char *dpos = (char *) &iwe_buf.u.data.length;
651 int dlen = dpos - (char *) &iwe_buf;
652 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
653 sizeof(struct iw_event) - dlen);
655 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
656 custom += IW_EV_POINT_OFF;
661 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
663 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
664 if (is_zero_ether_addr(
665 (const u8 *) iwe->u.ap_addr.sa_data) ||
666 os_memcmp(iwe->u.ap_addr.sa_data,
667 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
669 os_free(drv->assoc_req_ies);
670 drv->assoc_req_ies = NULL;
671 os_free(drv->assoc_resp_ies);
672 drv->assoc_resp_ies = NULL;
673 wpa_supplicant_event(ctx, EVENT_DISASSOC,
677 wpa_driver_nl80211_event_assoc_ies(drv);
678 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
681 case IWEVMICHAELMICFAILURE:
682 wpa_driver_nl80211_event_wireless_michaelmicfailure(
683 ctx, custom, iwe->u.data.length);
686 if (custom + iwe->u.data.length > end)
688 buf = os_malloc(iwe->u.data.length + 1);
691 os_memcpy(buf, custom, iwe->u.data.length);
692 buf[iwe->u.data.length] = '\0';
693 wpa_driver_nl80211_event_wireless_custom(ctx, buf);
697 wpa_driver_nl80211_event_wireless_assocreqie(
698 drv, custom, iwe->u.data.length);
700 case IWEVASSOCRESPIE:
701 wpa_driver_nl80211_event_wireless_assocrespie(
702 drv, custom, iwe->u.data.length);
705 wpa_driver_nl80211_event_wireless_pmkidcand(
706 drv, custom, iwe->u.data.length);
715 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
716 void *ctx, char *buf, size_t len,
719 union wpa_event_data event;
721 os_memset(&event, 0, sizeof(event));
722 if (len > sizeof(event.interface_status.ifname))
723 len = sizeof(event.interface_status.ifname) - 1;
724 os_memcpy(event.interface_status.ifname, buf, len);
725 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
726 EVENT_INTERFACE_ADDED;
728 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
730 event.interface_status.ifname,
731 del ? "removed" : "added");
733 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
740 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
744 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
747 struct ifinfomsg *ifi;
748 int attrlen, _nlmsg_len, rta_len;
753 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
755 attrlen = h->nlmsg_len - _nlmsg_len;
759 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
761 rta_len = RTA_ALIGN(sizeof(struct rtattr));
762 while (RTA_OK(attr, attrlen)) {
763 if (attr->rta_type == IFLA_IFNAME) {
764 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
770 attr = RTA_NEXT(attr, attrlen);
777 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
778 int ifindex, struct nlmsghdr *h)
780 if (drv->ifindex == ifindex)
783 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
784 drv->ifindex = if_nametoindex(drv->ifname);
785 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
787 wpa_driver_nl80211_finish_drv_init(drv);
795 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
796 void *ctx, struct nlmsghdr *h,
799 struct ifinfomsg *ifi;
800 int attrlen, _nlmsg_len, rta_len;
801 struct rtattr * attr;
803 if (len < sizeof(*ifi))
808 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
809 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
814 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
816 drv->operstate, ifi->ifi_flags,
817 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
818 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
819 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
820 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
822 * Some drivers send the association event before the operup event--in
823 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
824 * fails. This will hit us when wpa_supplicant does not need to do
825 * IEEE 802.1X authentication
827 if (drv->operstate == 1 &&
828 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
829 !(ifi->ifi_flags & IFF_RUNNING))
830 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
832 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
834 attrlen = h->nlmsg_len - _nlmsg_len;
838 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
840 rta_len = RTA_ALIGN(sizeof(struct rtattr));
841 while (RTA_OK(attr, attrlen)) {
842 if (attr->rta_type == IFLA_WIRELESS) {
843 wpa_driver_nl80211_event_wireless(
844 drv, ctx, ((char *) attr) + rta_len,
845 attr->rta_len - rta_len);
846 } else if (attr->rta_type == IFLA_IFNAME) {
847 wpa_driver_nl80211_event_link(
849 ((char *) attr) + rta_len,
850 attr->rta_len - rta_len, 0);
852 attr = RTA_NEXT(attr, attrlen);
857 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
858 void *ctx, struct nlmsghdr *h,
861 struct ifinfomsg *ifi;
862 int attrlen, _nlmsg_len, rta_len;
863 struct rtattr * attr;
865 if (len < sizeof(*ifi))
870 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
872 attrlen = h->nlmsg_len - _nlmsg_len;
876 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
878 rta_len = RTA_ALIGN(sizeof(struct rtattr));
879 while (RTA_OK(attr, attrlen)) {
880 if (attr->rta_type == IFLA_IFNAME) {
881 wpa_driver_nl80211_event_link(
883 ((char *) attr) + rta_len,
884 attr->rta_len - rta_len, 1);
886 attr = RTA_NEXT(attr, attrlen);
891 static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
896 struct sockaddr_nl from;
902 fromlen = sizeof(from);
903 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
904 (struct sockaddr *) &from, &fromlen);
906 if (errno != EINTR && errno != EAGAIN)
907 perror("recvfrom(netlink)");
911 h = (struct nlmsghdr *) buf;
912 while (left >= (int) sizeof(*h)) {
916 plen = len - sizeof(*h);
917 if (len > left || plen < 0) {
918 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
919 "len=%d left=%d plen=%d",
924 switch (h->nlmsg_type) {
926 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
930 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
935 len = NLMSG_ALIGN(len);
937 h = (struct nlmsghdr *) ((char *) h + len);
941 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
945 if (--max_events > 0) {
947 * Try to receive all events in one eloop call in order to
948 * limit race condition on cases where AssocInfo event, Assoc
949 * event, and EAPOL frames are received more or less at the
950 * same time. We want to process the event messages first
951 * before starting EAPOL processing.
958 static int no_seq_check(struct nl_msg *msg, void *arg)
964 static int process_event(struct nl_msg *msg, void *arg)
966 struct wpa_driver_nl80211_data *drv = arg;
967 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
968 struct nlattr *tb[NL80211_ATTR_MAX + 1];
970 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
971 genlmsg_attrlen(gnlh, 0), NULL);
973 if (tb[NL80211_ATTR_IFINDEX]) {
974 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
975 if (ifindex != drv->ifindex) {
976 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
977 " for foreign interface (ifindex %d)",
984 case NL80211_CMD_NEW_SCAN_RESULTS:
985 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
986 drv->scan_complete_events = 1;
987 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
989 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
991 case NL80211_CMD_SCAN_ABORTED:
992 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
994 * Need to indicate that scan results are available in order
995 * not to make wpa_supplicant stop its scanning.
997 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
999 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1002 wpa_printf(MSG_DEBUG, "nl0211: Ignored unknown event (cmd=%d)",
1011 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1015 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1017 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1019 cb = nl_cb_clone(drv->nl_cb);
1022 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1023 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1024 nl_recvmsgs(drv->nl_handle, cb);
1029 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
1030 const char *ifname, int *flags)
1034 os_memset(&ifr, 0, sizeof(ifr));
1035 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1036 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
1037 perror("ioctl[SIOCGIFFLAGS]");
1040 *flags = ifr.ifr_flags & 0xffff;
1046 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
1047 * @drv: driver_nl80211 private data
1048 * @flags: Pointer to returned flags value
1049 * Returns: 0 on success, -1 on failure
1051 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
1054 return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
1058 static int wpa_driver_nl80211_set_ifflags_ifname(
1059 struct wpa_driver_nl80211_data *drv,
1060 const char *ifname, int flags)
1064 os_memset(&ifr, 0, sizeof(ifr));
1065 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1066 ifr.ifr_flags = flags & 0xffff;
1067 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
1068 perror("SIOCSIFFLAGS");
1076 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1077 * @drv: driver_nl80211 private data
1078 * @flags: New value for flags
1079 * Returns: 0 on success, -1 on failure
1081 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
1084 return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
1089 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1090 * @priv: driver_nl80211 private data
1091 * @alpha2_arg: country to which to switch to
1092 * Returns: 0 on success, -1 on failure
1094 * This asks nl80211 to set the regulatory domain for given
1095 * country ISO / IEC alpha2.
1097 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1099 struct wpa_driver_nl80211_data *drv = priv;
1103 msg = nlmsg_alloc();
1105 goto nla_put_failure;
1107 alpha2[0] = alpha2_arg[0];
1108 alpha2[1] = alpha2_arg[1];
1111 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1112 0, NL80211_CMD_REQ_SET_REG, 0);
1114 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1115 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1123 static int wpa_driver_nl80211_set_probe_req_ie(void *priv, const u8 *ies,
1126 struct wpa_driver_nl80211_data *drv = priv;
1130 msg = nlmsg_alloc();
1134 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1135 NL80211_CMD_SET_MGMT_EXTRA_IE, 0);
1137 NLA_PUT_U8(msg, NL80211_ATTR_MGMT_SUBTYPE, 4 /* ProbeReq */);
1139 NLA_PUT(msg, NL80211_ATTR_IE, ies_len, ies);
1143 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1145 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1153 #ifdef CONFIG_CLIENT_MLME
1155 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
1156 int drop_unencrypted, int userspace_mlme)
1158 #ifdef NL80211_CMD_SET_VIF
1162 msg = nlmsg_alloc();
1166 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1167 NL80211_CMD_SET_VIF, 0);
1169 if (drop_unencrypted >= 0)
1170 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
1172 if (userspace_mlme >= 0)
1173 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
1178 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1180 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1185 #else /* NL80211_CMD_SET_VIF */
1187 #endif /* NL80211_CMD_SET_VIF */
1191 static int wpa_driver_nl80211_set_userspace_mlme(
1192 struct wpa_driver_nl80211_data *drv, int enabled)
1194 return nl80211_set_vif(drv, -1, enabled);
1198 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
1203 msg = nlmsg_alloc();
1205 goto nla_put_failure;
1207 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1208 0, NL80211_CMD_DEL_INTERFACE, 0);
1209 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
1210 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
1213 wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
1217 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
1218 const char *ifname, enum nl80211_iftype iftype)
1220 struct nl_msg *msg, *flags = NULL;
1224 msg = nlmsg_alloc();
1228 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1229 0, NL80211_CMD_NEW_INTERFACE, 0);
1230 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
1231 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1232 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1234 if (iftype == NL80211_IFTYPE_MONITOR) {
1235 flags = nlmsg_alloc();
1237 goto nla_put_failure;
1239 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1241 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1246 goto nla_put_failure;
1249 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1252 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
1257 ifidx = if_nametoindex(ifname);
1265 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1267 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1269 unsigned char buf[3000];
1270 struct ieee80211_radiotap_iterator iter;
1272 int injected = 0, failed = 0, rxflags = 0;
1273 struct ieee80211_rx_status rx_status;
1275 len = recv(sock, buf, sizeof(buf), 0);
1281 if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1282 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1287 os_memset(&rx_status, 0, sizeof(rx_status));
1290 ret = ieee80211_radiotap_iterator_next(&iter);
1294 wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1295 "radiotap frame (%d)", ret);
1298 switch (iter.this_arg_index) {
1299 case IEEE80211_RADIOTAP_FLAGS:
1300 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1303 case IEEE80211_RADIOTAP_RX_FLAGS:
1306 case IEEE80211_RADIOTAP_TX_FLAGS:
1308 failed = le_to_host16((*(u16 *) iter.this_arg)) &
1309 IEEE80211_RADIOTAP_F_TX_FAIL;
1311 case IEEE80211_RADIOTAP_DATA_RETRIES:
1313 case IEEE80211_RADIOTAP_CHANNEL:
1314 /* TODO convert from freq/flags to channel number
1315 * rx_status.channel = XXX;
1318 case IEEE80211_RADIOTAP_RATE:
1320 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1321 rx_status.ssi = *iter.this_arg;
1326 if (rxflags && injected)
1330 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1331 len - iter.max_length, &rx_status);
1332 } else if (failed) {
1333 /* TX failure callback */
1335 /* TX success (ACK) callback */
1340 static int wpa_driver_nl80211_create_monitor_interface(
1341 struct wpa_driver_nl80211_data *drv)
1344 struct sockaddr_ll ll;
1348 os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1349 buf[IFNAMSIZ - 1] = '\0';
1351 drv->monitor_ifidx =
1352 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1354 if (drv->monitor_ifidx < 0)
1357 if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1358 wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1360 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1365 os_memset(&ll, 0, sizeof(ll));
1366 ll.sll_family = AF_PACKET;
1367 ll.sll_ifindex = drv->monitor_ifidx;
1368 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1369 if (drv->monitor_sock < 0) {
1370 perror("socket[PF_PACKET,SOCK_RAW]");
1374 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1376 perror("monitor socket bind");
1380 optlen = sizeof(optval);
1383 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1384 perror("Failed to set socket priority");
1388 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1390 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1398 nl80211_remove_iface(drv, drv->monitor_ifidx);
1402 #endif /* CONFIG_CLIENT_MLME */
1405 struct wiphy_info_data {
1410 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1412 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1413 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1414 struct wiphy_info_data *info = arg;
1416 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1417 genlmsg_attrlen(gnlh, 0), NULL);
1419 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1420 info->max_scan_ssids =
1421 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1427 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1428 struct wiphy_info_data *info)
1432 os_memset(info, 0, sizeof(*info));
1433 msg = nlmsg_alloc();
1437 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1438 0, NL80211_CMD_GET_WIPHY, 0);
1440 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1442 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1451 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1453 struct wiphy_info_data info;
1454 if (wpa_driver_nl80211_get_info(drv, &info))
1456 drv->has_capability = 1;
1457 drv->capa.max_scan_ssids = info.max_scan_ssids;
1462 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1463 * @ctx: context to be used when calling wpa_supplicant functions,
1464 * e.g., wpa_supplicant_event()
1465 * @ifname: interface name, e.g., wlan0
1466 * Returns: Pointer to private data, %NULL on failure
1468 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1471 struct sockaddr_nl local;
1472 struct wpa_driver_nl80211_data *drv;
1474 drv = os_zalloc(sizeof(*drv));
1478 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1480 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1481 if (drv->nl_cb == NULL) {
1482 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1487 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1488 if (drv->nl_handle == NULL) {
1489 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1494 if (genl_connect(drv->nl_handle)) {
1495 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1500 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1501 if (drv->nl_cache == NULL) {
1502 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1507 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1508 if (drv->nl80211 == NULL) {
1509 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1514 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1516 ret = nl_socket_add_membership(drv->nl_handle, ret);
1518 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1519 "membership for scan events: %d (%s)",
1520 ret, strerror(-ret));
1523 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1524 wpa_driver_nl80211_event_receive, drv, ctx);
1526 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1527 if (drv->ioctl_sock < 0) {
1528 perror("socket(PF_INET,SOCK_DGRAM)");
1532 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1534 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1538 os_memset(&local, 0, sizeof(local));
1539 local.nl_family = AF_NETLINK;
1540 local.nl_groups = RTMGRP_LINK;
1541 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1542 perror("bind(netlink)");
1547 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
1549 drv->wext_event_sock = s;
1551 if (wpa_driver_nl80211_finish_drv_init(drv))
1557 eloop_unregister_read_sock(drv->wext_event_sock);
1558 close(drv->wext_event_sock);
1560 close(drv->ioctl_sock);
1562 genl_family_put(drv->nl80211);
1564 nl_cache_free(drv->nl_cache);
1566 nl_handle_destroy(drv->nl_handle);
1568 nl_cb_put(drv->nl_cb);
1576 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1580 if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1581 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1585 if (!(flags & IFF_UP)) {
1586 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1587 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1594 * Make sure that the driver does not have any obsolete PMKID entries.
1596 wpa_driver_nl80211_flush_pmkid(drv);
1598 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1599 printf("Could not configure driver to use managed mode\n");
1602 wpa_driver_nl80211_get_range(drv);
1604 drv->ifindex = if_nametoindex(drv->ifname);
1606 wpa_driver_nl80211_capa(drv);
1608 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1615 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1616 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1618 * Shut down driver interface and processing of driver events. Free
1619 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1621 static void wpa_driver_nl80211_deinit(void *priv)
1623 struct wpa_driver_nl80211_data *drv = priv;
1626 #ifdef CONFIG_CLIENT_MLME
1627 if (drv->monitor_sock >= 0) {
1628 eloop_unregister_read_sock(drv->monitor_sock);
1629 close(drv->monitor_sock);
1631 if (drv->monitor_ifidx > 0)
1632 nl80211_remove_iface(drv, drv->monitor_ifidx);
1633 if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1634 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1635 #endif /* CONFIG_CLIENT_MLME */
1637 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1640 * Clear possibly configured driver parameters in order to make it
1641 * easier to use the driver after wpa_supplicant has been terminated.
1643 (void) wpa_driver_nl80211_set_bssid(drv,
1644 (u8 *) "\x00\x00\x00\x00\x00\x00");
1646 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1648 eloop_unregister_read_sock(drv->wext_event_sock);
1650 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1651 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1653 close(drv->wext_event_sock);
1654 close(drv->ioctl_sock);
1655 os_free(drv->assoc_req_ies);
1656 os_free(drv->assoc_resp_ies);
1658 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1659 genl_family_put(drv->nl80211);
1660 nl_cache_free(drv->nl_cache);
1661 nl_handle_destroy(drv->nl_handle);
1662 nl_cb_put(drv->nl_cb);
1669 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1670 * @eloop_ctx: Unused
1671 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1673 * This function can be used as registered timeout when starting a scan to
1674 * generate a scan completed event if the driver does not report this.
1676 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1678 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1679 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1684 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1685 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1686 * @params: Scan parameters
1687 * Returns: 0 on success, -1 on failure
1689 static int wpa_driver_nl80211_scan(void *priv,
1690 struct wpa_driver_scan_params *params)
1692 struct wpa_driver_nl80211_data *drv = priv;
1693 int ret = 0, timeout;
1694 struct nl_msg *msg, *ssids;
1697 msg = nlmsg_alloc();
1698 ssids = nlmsg_alloc();
1699 if (!msg || !ssids) {
1705 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1706 NL80211_CMD_TRIGGER_SCAN, 0);
1708 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1710 for (i = 0; i < params->num_ssids; i++) {
1711 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1712 params->ssids[i].ssid);
1714 if (params->num_ssids)
1715 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1717 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1720 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1721 "(%s)", ret, strerror(-ret));
1722 goto nla_put_failure;
1725 /* Not all drivers generate "scan completed" wireless event, so try to
1726 * read results after a timeout. */
1728 if (drv->scan_complete_events) {
1730 * The driver seems to deliver SIOCGIWSCAN events to notify
1731 * when scan is complete, so use longer timeout to avoid race
1732 * conditions with scanning and following association request.
1736 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1737 "seconds", ret, timeout);
1738 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1739 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1749 static int bss_info_handler(struct nl_msg *msg, void *arg)
1751 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1752 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1753 struct nlattr *bss[NL80211_BSS_MAX + 1];
1754 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1755 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1756 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1757 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1758 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1759 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1760 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1761 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1762 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1764 struct wpa_scan_results *res = arg;
1765 struct wpa_scan_res **tmp;
1766 struct wpa_scan_res *r;
1770 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1771 genlmsg_attrlen(gnlh, 0), NULL);
1772 if (!tb[NL80211_ATTR_BSS])
1774 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1777 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1778 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1779 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1785 r = os_zalloc(sizeof(*r) + ie_len);
1788 if (bss[NL80211_BSS_BSSID])
1789 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1791 if (bss[NL80211_BSS_FREQUENCY])
1792 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1793 if (bss[NL80211_BSS_BEACON_INTERVAL])
1794 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1795 if (bss[NL80211_BSS_CAPABILITY])
1796 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1797 if (bss[NL80211_BSS_SIGNAL_UNSPEC])
1798 r->qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1799 if (bss[NL80211_BSS_SIGNAL_MBM])
1800 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1801 if (bss[NL80211_BSS_TSF])
1802 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1805 os_memcpy(r + 1, ie, ie_len);
1807 tmp = os_realloc(res->res,
1808 (res->num + 1) * sizeof(struct wpa_scan_res *));
1813 tmp[res->num++] = r;
1821 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1822 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1823 * Returns: Scan results on success, -1 on failure
1825 static struct wpa_scan_results *
1826 wpa_driver_nl80211_get_scan_results(void *priv)
1828 struct wpa_driver_nl80211_data *drv = priv;
1830 struct wpa_scan_results *res;
1833 res = os_zalloc(sizeof(*res));
1836 msg = nlmsg_alloc();
1838 goto nla_put_failure;
1840 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1841 NL80211_CMD_GET_SCAN, 0);
1842 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1844 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1847 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1848 (unsigned long) res->num);
1851 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1852 "(%s)", ret, strerror(-ret));
1855 wpa_scan_results_free(res);
1860 static int wpa_driver_nl80211_get_range(void *priv)
1862 struct wpa_driver_nl80211_data *drv = priv;
1863 struct iw_range *range;
1869 * Use larger buffer than struct iw_range in order to allow the
1870 * structure to grow in the future.
1872 buflen = sizeof(struct iw_range) + 500;
1873 range = os_zalloc(buflen);
1877 os_memset(&iwr, 0, sizeof(iwr));
1878 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1879 iwr.u.data.pointer = (caddr_t) range;
1880 iwr.u.data.length = buflen;
1882 minlen = ((char *) &range->enc_capa) - (char *) range +
1883 sizeof(range->enc_capa);
1885 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1886 perror("ioctl[SIOCGIWRANGE]");
1889 } else if (iwr.u.data.length >= minlen &&
1890 range->we_version_compiled >= 18) {
1891 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1892 "WE(source)=%d enc_capa=0x%x",
1893 range->we_version_compiled,
1894 range->we_version_source,
1896 drv->has_capability = 1;
1897 drv->we_version_compiled = range->we_version_compiled;
1898 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1899 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1900 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1902 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1903 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1904 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1906 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1907 WPA_DRIVER_CAPA_ENC_WEP104;
1908 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1909 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1910 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1911 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1912 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x",
1913 drv->capa.key_mgmt, drv->capa.enc);
1915 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1916 "assuming WPA is not supported");
1924 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1926 struct wpa_driver_nl80211_data *drv = priv;
1927 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1929 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1934 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1935 const u8 *addr, int key_idx,
1936 int set_tx, const u8 *seq,
1938 const u8 *key, size_t key_len)
1940 struct wpa_driver_nl80211_data *drv = priv;
1944 wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1945 "seq_len=%lu key_len=%lu",
1946 __func__, alg, addr, key_idx, set_tx,
1947 (unsigned long) seq_len, (unsigned long) key_len);
1949 msg = nlmsg_alloc();
1953 if (alg == WPA_ALG_NONE) {
1954 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1955 NL80211_CMD_DEL_KEY, 0);
1957 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1958 NL80211_CMD_NEW_KEY, 0);
1959 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1963 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1966 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1970 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1973 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1981 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1983 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1984 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1986 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1987 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1989 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1991 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1995 if (set_tx && alg != WPA_ALG_NONE) {
1996 msg = nlmsg_alloc();
2000 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2001 0, NL80211_CMD_SET_KEY, 0);
2002 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2003 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2004 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2006 err = send_and_recv_msgs(drv, msg, NULL, NULL);
2008 wpa_printf(MSG_DEBUG, "nl80211: set default key "
2009 "failed; err=%d", err);
2021 static int wpa_driver_nl80211_set_countermeasures(void *priv,
2024 struct wpa_driver_nl80211_data *drv = priv;
2025 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2026 return wpa_driver_nl80211_set_auth_param(drv,
2027 IW_AUTH_TKIP_COUNTERMEASURES,
2032 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
2035 struct wpa_driver_nl80211_data *drv = priv;
2036 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2037 drv->use_crypt = enabled;
2038 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2043 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2044 const u8 *addr, int cmd, int reason_code)
2047 struct iw_mlme mlme;
2050 os_memset(&iwr, 0, sizeof(iwr));
2051 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2052 os_memset(&mlme, 0, sizeof(mlme));
2054 mlme.reason_code = reason_code;
2055 mlme.addr.sa_family = ARPHRD_ETHER;
2056 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2057 iwr.u.data.pointer = (caddr_t) &mlme;
2058 iwr.u.data.length = sizeof(mlme);
2060 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2061 perror("ioctl[SIOCSIWMLME]");
2069 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2072 struct wpa_driver_nl80211_data *drv = priv;
2073 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2074 return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2078 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2081 struct wpa_driver_nl80211_data *drv = priv;
2082 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2083 return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2088 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2091 struct wpa_driver_nl80211_data *drv = priv;
2095 os_memset(&iwr, 0, sizeof(iwr));
2096 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2097 iwr.u.data.pointer = (caddr_t) ie;
2098 iwr.u.data.length = ie_len;
2100 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2101 perror("ioctl[SIOCSIWGENIE]");
2109 static int wpa_driver_nl80211_cipher2wext(int cipher)
2113 return IW_AUTH_CIPHER_NONE;
2115 return IW_AUTH_CIPHER_WEP40;
2117 return IW_AUTH_CIPHER_TKIP;
2119 return IW_AUTH_CIPHER_CCMP;
2121 return IW_AUTH_CIPHER_WEP104;
2128 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2131 case KEY_MGMT_802_1X:
2132 case KEY_MGMT_802_1X_NO_WPA:
2133 return IW_AUTH_KEY_MGMT_802_1X;
2135 return IW_AUTH_KEY_MGMT_PSK;
2143 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2144 struct wpa_driver_associate_params *params)
2149 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2150 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2152 os_memset(&iwr, 0, sizeof(iwr));
2153 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2154 /* Just changing mode, not actual keys */
2155 iwr.u.encoding.flags = 0;
2156 iwr.u.encoding.pointer = (caddr_t) NULL;
2157 iwr.u.encoding.length = 0;
2160 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2161 * different things. Here they are used to indicate Open System vs.
2162 * Shared Key authentication algorithm. However, some drivers may use
2163 * them to select between open/restricted WEP encrypted (open = allow
2164 * both unencrypted and encrypted frames; restricted = only allow
2165 * encrypted frames).
2168 if (!drv->use_crypt) {
2169 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2171 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2172 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2173 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2174 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2177 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2178 perror("ioctl[SIOCSIWENCODE]");
2186 static int wpa_driver_nl80211_associate(
2187 void *priv, struct wpa_driver_associate_params *params)
2189 struct wpa_driver_nl80211_data *drv = priv;
2191 int allow_unencrypted_eapol;
2194 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2197 * If the driver did not support SIOCSIWAUTH, fallback to
2198 * SIOCSIWENCODE here.
2200 if (drv->auth_alg_fallback &&
2201 wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2204 if (!params->bssid &&
2205 wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2208 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2209 * from configuration, not from here, where only the selected suite is
2211 if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2214 if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2215 value = IW_AUTH_WPA_VERSION_DISABLED;
2216 else if (params->wpa_ie[0] == WLAN_EID_RSN)
2217 value = IW_AUTH_WPA_VERSION_WPA2;
2219 value = IW_AUTH_WPA_VERSION_WPA;
2220 if (wpa_driver_nl80211_set_auth_param(drv,
2221 IW_AUTH_WPA_VERSION, value) < 0)
2223 value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2224 if (wpa_driver_nl80211_set_auth_param(drv,
2225 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2227 value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2228 if (wpa_driver_nl80211_set_auth_param(drv,
2229 IW_AUTH_CIPHER_GROUP, value) < 0)
2231 value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2232 if (wpa_driver_nl80211_set_auth_param(drv,
2233 IW_AUTH_KEY_MGMT, value) < 0)
2235 value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2236 params->pairwise_suite != CIPHER_NONE ||
2237 params->group_suite != CIPHER_NONE ||
2239 if (wpa_driver_nl80211_set_auth_param(drv,
2240 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2243 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2244 * not using WPA. IEEE 802.1X specifies that these frames are not
2245 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2246 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2247 params->key_mgmt_suite == KEY_MGMT_PSK)
2248 allow_unencrypted_eapol = 0;
2250 allow_unencrypted_eapol = 1;
2252 if (wpa_driver_nl80211_set_auth_param(drv,
2253 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2254 allow_unencrypted_eapol) < 0)
2256 if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2258 if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2260 if (params->bssid &&
2261 wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2268 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2270 struct wpa_driver_nl80211_data *drv = priv;
2273 if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2274 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2275 if (auth_alg & AUTH_ALG_SHARED_KEY)
2276 algs |= IW_AUTH_ALG_SHARED_KEY;
2277 if (auth_alg & AUTH_ALG_LEAP)
2278 algs |= IW_AUTH_ALG_LEAP;
2280 /* at least one algorithm should be set */
2281 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2284 res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2286 drv->auth_alg_fallback = res == -2;
2292 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2293 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2294 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2295 * Returns: 0 on success, -1 on failure
2297 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2299 struct wpa_driver_nl80211_data *drv = priv;
2300 int ret = -1, flags;
2303 msg = nlmsg_alloc();
2307 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2308 0, NL80211_CMD_SET_INTERFACE, 0);
2309 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2310 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2311 mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2313 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2320 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
2324 /* mac80211 doesn't allow mode changes while the device is up, so
2325 * take the device down, try to set the mode again, and bring the
2328 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2329 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2331 /* Try to set the mode again while the interface is down */
2332 msg = nlmsg_alloc();
2336 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2337 0, NL80211_CMD_SET_INTERFACE, 0);
2338 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2339 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2340 mode ? NL80211_IFTYPE_ADHOC :
2341 NL80211_IFTYPE_STATION);
2342 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2344 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2345 "mode", drv->ifname);
2348 /* Ignore return value of get_ifflags to ensure that the device
2349 * is always up like it was before this function was called.
2351 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2352 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2359 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2360 u32 cmd, const u8 *bssid, const u8 *pmkid)
2363 struct iw_pmksa pmksa;
2366 os_memset(&iwr, 0, sizeof(iwr));
2367 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2368 os_memset(&pmksa, 0, sizeof(pmksa));
2370 pmksa.bssid.sa_family = ARPHRD_ETHER;
2372 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2374 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2375 iwr.u.data.pointer = (caddr_t) &pmksa;
2376 iwr.u.data.length = sizeof(pmksa);
2378 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2379 if (errno != EOPNOTSUPP)
2380 perror("ioctl[SIOCSIWPMKSA]");
2388 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2391 struct wpa_driver_nl80211_data *drv = priv;
2392 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2396 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2399 struct wpa_driver_nl80211_data *drv = priv;
2400 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2404 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2406 struct wpa_driver_nl80211_data *drv = priv;
2407 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2411 static int wpa_driver_nl80211_get_capa(void *priv,
2412 struct wpa_driver_capa *capa)
2414 struct wpa_driver_nl80211_data *drv = priv;
2415 if (!drv->has_capability)
2417 os_memcpy(capa, &drv->capa, sizeof(*capa));
2422 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2424 struct wpa_driver_nl80211_data *drv = priv;
2426 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2427 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2428 drv->operstate = state;
2429 return wpa_driver_nl80211_send_oper_ifla(
2430 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2434 #ifdef CONFIG_CLIENT_MLME
2435 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2437 if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2438 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2442 if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2443 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2449 #endif /* CONFIG_CLIENT_MLME */
2452 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2454 #ifdef CONFIG_CLIENT_MLME
2455 struct wpa_driver_nl80211_data *drv = priv;
2460 wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2462 if (os_strstr(param, "use_mlme=1")) {
2463 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2464 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2466 if (wpa_driver_nl80211_open_mlme(drv))
2469 #endif /* CONFIG_CLIENT_MLME */
2475 #ifdef CONFIG_CLIENT_MLME
2477 struct phy_info_arg {
2479 struct wpa_hw_modes *modes;
2483 static int phy_info_handler(struct nl_msg *msg, void *arg)
2485 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2486 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2487 struct phy_info_arg *phy_info = arg;
2489 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2491 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2492 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2494 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2495 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2496 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2497 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2498 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2501 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2502 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2503 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2504 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2505 { .type = NLA_FLAG },
2508 struct nlattr *nl_band;
2509 struct nlattr *nl_freq;
2510 struct nlattr *nl_rate;
2511 int rem_band, rem_freq, rem_rate;
2512 struct wpa_hw_modes *mode;
2513 int idx, mode_is_set;
2515 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2516 genlmsg_attrlen(gnlh, 0), NULL);
2518 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2521 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2523 mode = os_realloc(phy_info->modes,
2524 (*phy_info->num_modes + 1) * sizeof(*mode));
2527 phy_info->modes = mode;
2531 mode = &phy_info->modes[*(phy_info->num_modes)];
2532 os_memset(mode, 0, sizeof(*mode));
2533 *(phy_info->num_modes) += 1;
2535 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2536 nla_len(nl_band), NULL);
2538 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2540 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2541 nla_data(nl_freq), nla_len(nl_freq),
2543 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2545 mode->num_channels++;
2548 mode->channels = os_zalloc(mode->num_channels *
2549 sizeof(struct wpa_channel_data));
2550 if (!mode->channels)
2555 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2557 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2558 nla_data(nl_freq), nla_len(nl_freq),
2560 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2563 mode->channels[idx].freq = nla_get_u32(
2564 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2565 mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2566 WPA_CHAN_W_ACTIVE_SCAN |
2570 /* crude heuristic */
2571 if (mode->channels[idx].freq < 4000)
2572 mode->mode = WPA_MODE_IEEE80211B;
2574 mode->mode = WPA_MODE_IEEE80211A;
2578 /* crude heuristic */
2579 if (mode->channels[idx].freq < 4000) {
2580 if (mode->channels[idx].freq == 2848)
2581 mode->channels[idx].chan = 14;
2583 mode->channels[idx].chan =
2584 (mode->channels[idx].freq -
2587 mode->channels[idx].chan =
2588 mode->channels[idx].freq / 5 - 1000;
2590 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2591 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2592 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2593 mode->channels[idx].flag &=
2594 ~WPA_CHAN_W_ACTIVE_SCAN;
2595 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2596 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2600 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2602 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2603 nla_data(nl_rate), nla_len(nl_rate),
2605 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2610 mode->rates = os_zalloc(mode->num_rates *
2611 sizeof(struct wpa_rate_data));
2617 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2619 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2620 nla_data(nl_rate), nla_len(nl_rate),
2622 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2624 mode->rates[idx].rate = nla_get_u32(
2625 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2627 /* crude heuristic */
2628 if (mode->mode == WPA_MODE_IEEE80211B &&
2629 mode->rates[idx].rate > 200)
2630 mode->mode = WPA_MODE_IEEE80211G;
2632 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2633 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2643 static struct wpa_hw_modes *
2644 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2646 struct wpa_driver_nl80211_data *drv = priv;
2648 struct phy_info_arg result = {
2649 .num_modes = num_modes,
2656 msg = nlmsg_alloc();
2660 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2661 0, NL80211_CMD_GET_WIPHY, 0);
2663 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2665 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2666 return result.modes;
2672 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2675 return wpa_driver_nl80211_set_freq(priv, freq);
2679 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2682 struct wpa_driver_nl80211_data *drv = priv;
2684 0x00, 0x00, /* radiotap version */
2685 0x0e, 0x00, /* radiotap length */
2686 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2687 0x0c, /* F_WEP | F_FRAG (encrypt/fragment if required) */
2689 0x00, 0x00, /* RX and TX flags to indicate that */
2690 0x00, 0x00, /* this is the injected frame directly */
2692 struct iovec iov[2] = {
2694 .iov_base = &rtap_hdr,
2695 .iov_len = sizeof(rtap_hdr),
2698 .iov_base = (void *) data,
2699 .iov_len = data_len,
2702 struct msghdr msg = {
2707 .msg_control = NULL,
2708 .msg_controllen = 0,
2712 if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2713 perror("send[MLME]");
2721 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2722 const u8 *supp_rates,
2723 size_t supp_rates_len)
2725 struct wpa_driver_nl80211_data *drv = priv;
2729 msg = nlmsg_alloc();
2733 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2734 0, NL80211_CMD_NEW_STATION, 0);
2736 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2737 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2738 /* TODO: Get proper Association ID and listen interval */
2739 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2740 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2742 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2744 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2745 /* ignore EEXIST, this happens if a STA associates while associated */
2746 if (ret == -EEXIST || ret >= 0)
2754 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2756 struct wpa_driver_nl80211_data *drv = priv;
2760 msg = nlmsg_alloc();
2764 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2765 0, NL80211_CMD_DEL_STATION, 0);
2767 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2768 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2772 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2779 #endif /* CONFIG_CLIENT_MLME */
2782 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2784 .desc = "Linux nl80211/cfg80211",
2785 .get_bssid = wpa_driver_nl80211_get_bssid,
2786 .get_ssid = wpa_driver_nl80211_get_ssid,
2787 .set_wpa = wpa_driver_nl80211_set_wpa,
2788 .set_key = wpa_driver_nl80211_set_key,
2789 .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2790 .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2791 .scan2 = wpa_driver_nl80211_scan,
2792 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2793 .deauthenticate = wpa_driver_nl80211_deauthenticate,
2794 .disassociate = wpa_driver_nl80211_disassociate,
2795 .set_mode = wpa_driver_nl80211_set_mode,
2796 .associate = wpa_driver_nl80211_associate,
2797 .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2798 .init = wpa_driver_nl80211_init,
2799 .deinit = wpa_driver_nl80211_deinit,
2800 .set_param = wpa_driver_nl80211_set_param,
2801 .add_pmkid = wpa_driver_nl80211_add_pmkid,
2802 .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2803 .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2804 .get_capa = wpa_driver_nl80211_get_capa,
2805 .set_operstate = wpa_driver_nl80211_set_operstate,
2806 .set_country = wpa_driver_nl80211_set_country,
2807 .set_probe_req_ie = wpa_driver_nl80211_set_probe_req_ie,
2808 #ifdef CONFIG_CLIENT_MLME
2809 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2810 .set_channel = wpa_driver_nl80211_set_channel,
2811 .set_ssid = wpa_driver_nl80211_set_ssid,
2812 .set_bssid = wpa_driver_nl80211_set_bssid,
2813 .send_mlme = wpa_driver_nl80211_send_mlme,
2814 .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2815 .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2816 #endif /* CONFIG_CLIENT_MLME */