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 = aliasing_hide_typecast(
245 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
247 rta->rta_type = IFLA_LINKMODE;
248 rta->rta_len = RTA_LENGTH(sizeof(char));
249 *((char *) RTA_DATA(rta)) = linkmode;
250 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
251 RTA_LENGTH(sizeof(char));
253 if (operstate != -1) {
254 rta = (struct rtattr *)
255 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
256 rta->rta_type = IFLA_OPERSTATE;
257 rta->rta_len = RTA_LENGTH(sizeof(char));
258 *((char *) RTA_DATA(rta)) = operstate;
259 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
260 RTA_LENGTH(sizeof(char));
263 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
264 linkmode, operstate);
266 ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
268 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
269 "%s (assume operstate is not supported)",
273 return ret < 0 ? -1 : 0;
277 static int wpa_driver_nl80211_set_auth_param(
278 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
283 os_memset(&iwr, 0, sizeof(iwr));
284 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
285 iwr.u.param.flags = idx & IW_AUTH_INDEX;
286 iwr.u.param.value = value;
288 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
289 if (errno != EOPNOTSUPP) {
290 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
291 "value 0x%x) failed: %s)",
292 idx, value, strerror(errno));
294 ret = errno == EOPNOTSUPP ? -2 : -1;
301 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
303 struct wpa_driver_nl80211_data *drv = priv;
307 os_memset(&iwr, 0, sizeof(iwr));
308 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
310 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
311 perror("ioctl[SIOCGIWAP]");
314 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
320 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
322 struct wpa_driver_nl80211_data *drv = priv;
326 os_memset(&iwr, 0, sizeof(iwr));
327 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
328 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
330 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
332 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
334 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
335 perror("ioctl[SIOCSIWAP]");
343 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
345 struct wpa_driver_nl80211_data *drv = priv;
349 os_memset(&iwr, 0, sizeof(iwr));
350 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
351 iwr.u.essid.pointer = (caddr_t) ssid;
352 iwr.u.essid.length = 32;
354 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
355 perror("ioctl[SIOCGIWESSID]");
358 ret = iwr.u.essid.length;
361 /* Some drivers include nul termination in the SSID, so let's
362 * remove it here before further processing. WE-21 changes this
363 * to explicitly require the length _not_ to include nul
365 if (ret > 0 && ssid[ret - 1] == '\0' &&
366 drv->we_version_compiled < 21)
374 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
377 struct wpa_driver_nl80211_data *drv = priv;
385 os_memset(&iwr, 0, sizeof(iwr));
386 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
387 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
388 iwr.u.essid.flags = (ssid_len != 0);
389 os_memset(buf, 0, sizeof(buf));
390 os_memcpy(buf, ssid, ssid_len);
391 iwr.u.essid.pointer = (caddr_t) buf;
392 if (drv->we_version_compiled < 21) {
393 /* For historic reasons, set SSID length to include one extra
394 * character, C string nul termination, even though SSID is
395 * really an octet string that should not be presented as a C
396 * string. Some Linux drivers decrement the length by one and
397 * can thus end up missing the last octet of the SSID if the
398 * length is not incremented here. WE-21 changes this to
399 * explicitly require the length _not_ to include nul
404 iwr.u.essid.length = ssid_len;
406 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
407 perror("ioctl[SIOCSIWESSID]");
415 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
417 struct wpa_driver_nl80211_data *drv = priv;
421 os_memset(&iwr, 0, sizeof(iwr));
422 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
423 iwr.u.freq.m = freq * 100000;
426 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
427 perror("ioctl[SIOCSIWFREQ]");
436 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
438 union wpa_event_data data;
440 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
443 os_memset(&data, 0, sizeof(data));
445 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
446 data.michael_mic_failure.unicast =
447 os_strstr(custom, " unicast ") != NULL;
448 /* TODO: parse parameters(?) */
449 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
450 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
456 bytes = strspn(spos, "0123456789abcdefABCDEF");
457 if (!bytes || (bytes & 1))
461 data.assoc_info.req_ies = os_malloc(bytes);
462 if (data.assoc_info.req_ies == NULL)
465 data.assoc_info.req_ies_len = bytes;
466 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
470 data.assoc_info.resp_ies = NULL;
471 data.assoc_info.resp_ies_len = 0;
473 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
476 bytes = strspn(spos, "0123456789abcdefABCDEF");
477 if (!bytes || (bytes & 1))
481 data.assoc_info.resp_ies = os_malloc(bytes);
482 if (data.assoc_info.resp_ies == NULL)
485 data.assoc_info.resp_ies_len = bytes;
486 hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
489 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
492 os_free(data.assoc_info.resp_ies);
493 os_free(data.assoc_info.req_ies);
494 #ifdef CONFIG_PEERKEY
495 } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
496 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
497 wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
498 "STKSTART.request '%s'", custom + 17);
501 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
502 #endif /* CONFIG_PEERKEY */
507 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
508 void *ctx, const char *ev, size_t len)
510 const struct iw_michaelmicfailure *mic;
511 union wpa_event_data data;
513 if (len < sizeof(*mic))
516 mic = (const struct iw_michaelmicfailure *) ev;
518 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
519 "flags=0x%x src_addr=" MACSTR, mic->flags,
520 MAC2STR(mic->src_addr.sa_data));
522 os_memset(&data, 0, sizeof(data));
523 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
524 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
530 static int wpa_driver_nl80211_event_wireless_pmkidcand(
531 struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
533 const struct iw_pmkid_cand *cand;
534 union wpa_event_data data;
537 if (len < sizeof(*cand))
540 cand = (const struct iw_pmkid_cand *) ev;
541 addr = (const u8 *) cand->bssid.sa_data;
543 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
544 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
545 cand->index, MAC2STR(addr));
547 os_memset(&data, 0, sizeof(data));
548 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
549 data.pmkid_candidate.index = cand->index;
550 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
551 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
557 static int wpa_driver_nl80211_event_wireless_assocreqie(
558 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
563 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
565 os_free(drv->assoc_req_ies);
566 drv->assoc_req_ies = os_malloc(len);
567 if (drv->assoc_req_ies == NULL) {
568 drv->assoc_req_ies_len = 0;
571 os_memcpy(drv->assoc_req_ies, ev, len);
572 drv->assoc_req_ies_len = len;
578 static int wpa_driver_nl80211_event_wireless_assocrespie(
579 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
584 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
586 os_free(drv->assoc_resp_ies);
587 drv->assoc_resp_ies = os_malloc(len);
588 if (drv->assoc_resp_ies == NULL) {
589 drv->assoc_resp_ies_len = 0;
592 os_memcpy(drv->assoc_resp_ies, ev, len);
593 drv->assoc_resp_ies_len = len;
599 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
601 union wpa_event_data data;
603 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
606 os_memset(&data, 0, sizeof(data));
607 if (drv->assoc_req_ies) {
608 data.assoc_info.req_ies = drv->assoc_req_ies;
609 drv->assoc_req_ies = NULL;
610 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
612 if (drv->assoc_resp_ies) {
613 data.assoc_info.resp_ies = drv->assoc_resp_ies;
614 drv->assoc_resp_ies = NULL;
615 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
618 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
620 os_free(data.assoc_info.req_ies);
621 os_free(data.assoc_info.resp_ies);
625 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
626 void *ctx, char *data, int len)
628 struct iw_event iwe_buf, *iwe = &iwe_buf;
629 char *pos, *end, *custom, *buf;
634 while (pos + IW_EV_LCP_LEN <= end) {
635 /* Event data may be unaligned, so make a local, aligned copy
636 * before processing. */
637 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
638 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
640 if (iwe->len <= IW_EV_LCP_LEN)
643 custom = pos + IW_EV_POINT_LEN;
644 if (drv->we_version_compiled > 18 &&
645 (iwe->cmd == IWEVMICHAELMICFAILURE ||
646 iwe->cmd == IWEVCUSTOM ||
647 iwe->cmd == IWEVASSOCREQIE ||
648 iwe->cmd == IWEVASSOCRESPIE ||
649 iwe->cmd == IWEVPMKIDCAND)) {
650 /* WE-19 removed the pointer from struct iw_point */
651 char *dpos = (char *) &iwe_buf.u.data.length;
652 int dlen = dpos - (char *) &iwe_buf;
653 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
654 sizeof(struct iw_event) - dlen);
656 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
657 custom += IW_EV_POINT_OFF;
662 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
664 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
665 if (is_zero_ether_addr(
666 (const u8 *) iwe->u.ap_addr.sa_data) ||
667 os_memcmp(iwe->u.ap_addr.sa_data,
668 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
670 os_free(drv->assoc_req_ies);
671 drv->assoc_req_ies = NULL;
672 os_free(drv->assoc_resp_ies);
673 drv->assoc_resp_ies = NULL;
674 wpa_supplicant_event(ctx, EVENT_DISASSOC,
678 wpa_driver_nl80211_event_assoc_ies(drv);
679 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
682 case IWEVMICHAELMICFAILURE:
683 wpa_driver_nl80211_event_wireless_michaelmicfailure(
684 ctx, custom, iwe->u.data.length);
687 if (custom + iwe->u.data.length > end)
689 buf = os_malloc(iwe->u.data.length + 1);
692 os_memcpy(buf, custom, iwe->u.data.length);
693 buf[iwe->u.data.length] = '\0';
694 wpa_driver_nl80211_event_wireless_custom(ctx, buf);
698 wpa_driver_nl80211_event_wireless_assocreqie(
699 drv, custom, iwe->u.data.length);
701 case IWEVASSOCRESPIE:
702 wpa_driver_nl80211_event_wireless_assocrespie(
703 drv, custom, iwe->u.data.length);
706 wpa_driver_nl80211_event_wireless_pmkidcand(
707 drv, custom, iwe->u.data.length);
716 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
717 void *ctx, char *buf, size_t len,
720 union wpa_event_data event;
722 os_memset(&event, 0, sizeof(event));
723 if (len > sizeof(event.interface_status.ifname))
724 len = sizeof(event.interface_status.ifname) - 1;
725 os_memcpy(event.interface_status.ifname, buf, len);
726 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
727 EVENT_INTERFACE_ADDED;
729 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
731 event.interface_status.ifname,
732 del ? "removed" : "added");
734 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
741 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
745 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
748 struct ifinfomsg *ifi;
749 int attrlen, _nlmsg_len, rta_len;
754 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
756 attrlen = h->nlmsg_len - _nlmsg_len;
760 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
762 rta_len = RTA_ALIGN(sizeof(struct rtattr));
763 while (RTA_OK(attr, attrlen)) {
764 if (attr->rta_type == IFLA_IFNAME) {
765 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
771 attr = RTA_NEXT(attr, attrlen);
778 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
779 int ifindex, struct nlmsghdr *h)
781 if (drv->ifindex == ifindex)
784 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
785 drv->ifindex = if_nametoindex(drv->ifname);
786 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
788 wpa_driver_nl80211_finish_drv_init(drv);
796 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
797 void *ctx, struct nlmsghdr *h,
800 struct ifinfomsg *ifi;
801 int attrlen, _nlmsg_len, rta_len;
802 struct rtattr * attr;
804 if (len < sizeof(*ifi))
809 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
810 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
815 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
817 drv->operstate, ifi->ifi_flags,
818 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
819 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
820 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
821 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
823 * Some drivers send the association event before the operup event--in
824 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
825 * fails. This will hit us when wpa_supplicant does not need to do
826 * IEEE 802.1X authentication
828 if (drv->operstate == 1 &&
829 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
830 !(ifi->ifi_flags & IFF_RUNNING))
831 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
833 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
835 attrlen = h->nlmsg_len - _nlmsg_len;
839 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
841 rta_len = RTA_ALIGN(sizeof(struct rtattr));
842 while (RTA_OK(attr, attrlen)) {
843 if (attr->rta_type == IFLA_WIRELESS) {
844 wpa_driver_nl80211_event_wireless(
845 drv, ctx, ((char *) attr) + rta_len,
846 attr->rta_len - rta_len);
847 } else if (attr->rta_type == IFLA_IFNAME) {
848 wpa_driver_nl80211_event_link(
850 ((char *) attr) + rta_len,
851 attr->rta_len - rta_len, 0);
853 attr = RTA_NEXT(attr, attrlen);
858 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
859 void *ctx, struct nlmsghdr *h,
862 struct ifinfomsg *ifi;
863 int attrlen, _nlmsg_len, rta_len;
864 struct rtattr * attr;
866 if (len < sizeof(*ifi))
871 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
873 attrlen = h->nlmsg_len - _nlmsg_len;
877 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
879 rta_len = RTA_ALIGN(sizeof(struct rtattr));
880 while (RTA_OK(attr, attrlen)) {
881 if (attr->rta_type == IFLA_IFNAME) {
882 wpa_driver_nl80211_event_link(
884 ((char *) attr) + rta_len,
885 attr->rta_len - rta_len, 1);
887 attr = RTA_NEXT(attr, attrlen);
892 static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
897 struct sockaddr_nl from;
903 fromlen = sizeof(from);
904 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
905 (struct sockaddr *) &from, &fromlen);
907 if (errno != EINTR && errno != EAGAIN)
908 perror("recvfrom(netlink)");
912 h = (struct nlmsghdr *) buf;
913 while (left >= (int) sizeof(*h)) {
917 plen = len - sizeof(*h);
918 if (len > left || plen < 0) {
919 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
920 "len=%d left=%d plen=%d",
925 switch (h->nlmsg_type) {
927 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
931 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
936 len = NLMSG_ALIGN(len);
938 h = (struct nlmsghdr *) ((char *) h + len);
942 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
946 if (--max_events > 0) {
948 * Try to receive all events in one eloop call in order to
949 * limit race condition on cases where AssocInfo event, Assoc
950 * event, and EAPOL frames are received more or less at the
951 * same time. We want to process the event messages first
952 * before starting EAPOL processing.
959 static int no_seq_check(struct nl_msg *msg, void *arg)
965 static int process_event(struct nl_msg *msg, void *arg)
967 struct wpa_driver_nl80211_data *drv = arg;
968 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
969 struct nlattr *tb[NL80211_ATTR_MAX + 1];
971 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
972 genlmsg_attrlen(gnlh, 0), NULL);
974 if (tb[NL80211_ATTR_IFINDEX]) {
975 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
976 if (ifindex != drv->ifindex) {
977 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
978 " for foreign interface (ifindex %d)",
985 case NL80211_CMD_TRIGGER_SCAN:
986 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
988 case NL80211_CMD_NEW_SCAN_RESULTS:
989 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
990 drv->scan_complete_events = 1;
991 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
993 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
995 case NL80211_CMD_SCAN_ABORTED:
996 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
998 * Need to indicate that scan results are available in order
999 * not to make wpa_supplicant stop its scanning.
1001 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1003 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1006 wpa_printf(MSG_DEBUG, "nl0211: Ignored unknown event (cmd=%d)",
1015 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1019 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1021 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1023 cb = nl_cb_clone(drv->nl_cb);
1026 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1027 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1028 nl_recvmsgs(drv->nl_handle, cb);
1033 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
1034 const char *ifname, int *flags)
1038 os_memset(&ifr, 0, sizeof(ifr));
1039 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1040 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
1041 perror("ioctl[SIOCGIFFLAGS]");
1044 *flags = ifr.ifr_flags & 0xffff;
1050 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
1051 * @drv: driver_nl80211 private data
1052 * @flags: Pointer to returned flags value
1053 * Returns: 0 on success, -1 on failure
1055 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
1058 return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
1062 static int wpa_driver_nl80211_set_ifflags_ifname(
1063 struct wpa_driver_nl80211_data *drv,
1064 const char *ifname, int flags)
1068 os_memset(&ifr, 0, sizeof(ifr));
1069 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1070 ifr.ifr_flags = flags & 0xffff;
1071 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
1072 perror("SIOCSIFFLAGS");
1080 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1081 * @drv: driver_nl80211 private data
1082 * @flags: New value for flags
1083 * Returns: 0 on success, -1 on failure
1085 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
1088 return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
1093 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1094 * @priv: driver_nl80211 private data
1095 * @alpha2_arg: country to which to switch to
1096 * Returns: 0 on success, -1 on failure
1098 * This asks nl80211 to set the regulatory domain for given
1099 * country ISO / IEC alpha2.
1101 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1103 struct wpa_driver_nl80211_data *drv = priv;
1107 msg = nlmsg_alloc();
1109 goto nla_put_failure;
1111 alpha2[0] = alpha2_arg[0];
1112 alpha2[1] = alpha2_arg[1];
1115 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1116 0, NL80211_CMD_REQ_SET_REG, 0);
1118 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1119 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1127 static int wpa_driver_nl80211_set_probe_req_ie(void *priv, const u8 *ies,
1130 struct wpa_driver_nl80211_data *drv = priv;
1134 msg = nlmsg_alloc();
1138 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1139 NL80211_CMD_SET_MGMT_EXTRA_IE, 0);
1141 NLA_PUT_U8(msg, NL80211_ATTR_MGMT_SUBTYPE, 4 /* ProbeReq */);
1143 NLA_PUT(msg, NL80211_ATTR_IE, ies_len, ies);
1147 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1149 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1157 #ifdef CONFIG_CLIENT_MLME
1159 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
1160 int drop_unencrypted, int userspace_mlme)
1162 #ifdef NL80211_CMD_SET_VIF
1166 msg = nlmsg_alloc();
1170 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1171 NL80211_CMD_SET_VIF, 0);
1173 if (drop_unencrypted >= 0)
1174 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
1176 if (userspace_mlme >= 0)
1177 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
1182 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1184 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1189 #else /* NL80211_CMD_SET_VIF */
1191 #endif /* NL80211_CMD_SET_VIF */
1195 static int wpa_driver_nl80211_set_userspace_mlme(
1196 struct wpa_driver_nl80211_data *drv, int enabled)
1198 return nl80211_set_vif(drv, -1, enabled);
1202 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
1207 msg = nlmsg_alloc();
1209 goto nla_put_failure;
1211 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1212 0, NL80211_CMD_DEL_INTERFACE, 0);
1213 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
1214 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
1217 wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
1221 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
1222 const char *ifname, enum nl80211_iftype iftype)
1224 struct nl_msg *msg, *flags = NULL;
1228 msg = nlmsg_alloc();
1232 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1233 0, NL80211_CMD_NEW_INTERFACE, 0);
1234 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
1235 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1236 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1238 if (iftype == NL80211_IFTYPE_MONITOR) {
1239 flags = nlmsg_alloc();
1241 goto nla_put_failure;
1243 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1245 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1250 goto nla_put_failure;
1253 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1256 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
1261 ifidx = if_nametoindex(ifname);
1269 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1271 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1273 unsigned char buf[3000];
1274 struct ieee80211_radiotap_iterator iter;
1276 int injected = 0, failed = 0, rxflags = 0;
1277 struct ieee80211_rx_status rx_status;
1279 len = recv(sock, buf, sizeof(buf), 0);
1285 if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1286 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1291 os_memset(&rx_status, 0, sizeof(rx_status));
1294 ret = ieee80211_radiotap_iterator_next(&iter);
1298 wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1299 "radiotap frame (%d)", ret);
1302 switch (iter.this_arg_index) {
1303 case IEEE80211_RADIOTAP_FLAGS:
1304 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1307 case IEEE80211_RADIOTAP_RX_FLAGS:
1310 case IEEE80211_RADIOTAP_TX_FLAGS:
1312 failed = le_to_host16((*(u16 *) iter.this_arg)) &
1313 IEEE80211_RADIOTAP_F_TX_FAIL;
1315 case IEEE80211_RADIOTAP_DATA_RETRIES:
1317 case IEEE80211_RADIOTAP_CHANNEL:
1318 /* TODO convert from freq/flags to channel number
1319 * rx_status.channel = XXX;
1322 case IEEE80211_RADIOTAP_RATE:
1324 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1325 rx_status.ssi = *iter.this_arg;
1330 if (rxflags && injected)
1334 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1335 len - iter.max_length, &rx_status);
1336 } else if (failed) {
1337 /* TX failure callback */
1339 /* TX success (ACK) callback */
1344 static int wpa_driver_nl80211_create_monitor_interface(
1345 struct wpa_driver_nl80211_data *drv)
1348 struct sockaddr_ll ll;
1352 os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1353 buf[IFNAMSIZ - 1] = '\0';
1355 drv->monitor_ifidx =
1356 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1358 if (drv->monitor_ifidx < 0)
1361 if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1362 wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1364 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1369 os_memset(&ll, 0, sizeof(ll));
1370 ll.sll_family = AF_PACKET;
1371 ll.sll_ifindex = drv->monitor_ifidx;
1372 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1373 if (drv->monitor_sock < 0) {
1374 perror("socket[PF_PACKET,SOCK_RAW]");
1378 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1380 perror("monitor socket bind");
1384 optlen = sizeof(optval);
1387 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1388 perror("Failed to set socket priority");
1392 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1394 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1402 nl80211_remove_iface(drv, drv->monitor_ifidx);
1406 #endif /* CONFIG_CLIENT_MLME */
1410 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1411 * @ctx: context to be used when calling wpa_supplicant functions,
1412 * e.g., wpa_supplicant_event()
1413 * @ifname: interface name, e.g., wlan0
1414 * Returns: Pointer to private data, %NULL on failure
1416 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1419 struct sockaddr_nl local;
1420 struct wpa_driver_nl80211_data *drv;
1422 drv = os_zalloc(sizeof(*drv));
1426 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1428 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1429 if (drv->nl_cb == NULL) {
1430 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1435 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1436 if (drv->nl_handle == NULL) {
1437 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1442 if (genl_connect(drv->nl_handle)) {
1443 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1448 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1449 if (drv->nl_cache == NULL) {
1450 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1455 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1456 if (drv->nl80211 == NULL) {
1457 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1462 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1464 ret = nl_socket_add_membership(drv->nl_handle, ret);
1466 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1467 "membership for scan events: %d (%s)",
1468 ret, strerror(-ret));
1471 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1472 wpa_driver_nl80211_event_receive, drv, ctx);
1474 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1475 if (drv->ioctl_sock < 0) {
1476 perror("socket(PF_INET,SOCK_DGRAM)");
1480 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1482 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1486 os_memset(&local, 0, sizeof(local));
1487 local.nl_family = AF_NETLINK;
1488 local.nl_groups = RTMGRP_LINK;
1489 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1490 perror("bind(netlink)");
1495 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
1497 drv->wext_event_sock = s;
1499 wpa_driver_nl80211_finish_drv_init(drv);
1504 close(drv->ioctl_sock);
1506 genl_family_put(drv->nl80211);
1508 nl_cache_free(drv->nl_cache);
1510 nl_handle_destroy(drv->nl_handle);
1512 nl_cb_put(drv->nl_cb);
1520 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1524 drv->ifindex = if_nametoindex(drv->ifname);
1526 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1527 printf("Could not configure driver to use managed mode\n");
1530 if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
1531 printf("Could not get interface '%s' flags\n", drv->ifname);
1532 else if (!(flags & IFF_UP)) {
1533 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1534 printf("Could not set interface '%s' UP\n",
1540 * Make sure that the driver does not have any obsolete PMKID entries.
1542 wpa_driver_nl80211_flush_pmkid(drv);
1544 wpa_driver_nl80211_get_range(drv);
1546 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1551 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1552 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1554 * Shut down driver interface and processing of driver events. Free
1555 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1557 static void wpa_driver_nl80211_deinit(void *priv)
1559 struct wpa_driver_nl80211_data *drv = priv;
1562 #ifdef CONFIG_CLIENT_MLME
1563 if (drv->monitor_sock >= 0) {
1564 eloop_unregister_read_sock(drv->monitor_sock);
1565 close(drv->monitor_sock);
1567 if (drv->monitor_ifidx > 0)
1568 nl80211_remove_iface(drv, drv->monitor_ifidx);
1569 if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1570 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1571 #endif /* CONFIG_CLIENT_MLME */
1573 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1576 * Clear possibly configured driver parameters in order to make it
1577 * easier to use the driver after wpa_supplicant has been terminated.
1579 (void) wpa_driver_nl80211_set_bssid(drv,
1580 (u8 *) "\x00\x00\x00\x00\x00\x00");
1582 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1584 eloop_unregister_read_sock(drv->wext_event_sock);
1586 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1587 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1589 close(drv->wext_event_sock);
1590 close(drv->ioctl_sock);
1591 os_free(drv->assoc_req_ies);
1592 os_free(drv->assoc_resp_ies);
1594 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1595 genl_family_put(drv->nl80211);
1596 nl_cache_free(drv->nl_cache);
1597 nl_handle_destroy(drv->nl_handle);
1598 nl_cb_put(drv->nl_cb);
1605 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1606 * @eloop_ctx: Unused
1607 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1609 * This function can be used as registered timeout when starting a scan to
1610 * generate a scan completed event if the driver does not report this.
1612 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1614 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1615 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1620 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1621 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1622 * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1623 * all SSIDs (either active scan with broadcast SSID or passive
1625 * @ssid_len: Length of the SSID
1626 * Returns: 0 on success, -1 on failure
1628 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1630 struct wpa_driver_nl80211_data *drv = priv;
1631 int ret = 0, timeout;
1632 struct nl_msg *msg, *ssids;
1634 msg = nlmsg_alloc();
1635 ssids = nlmsg_alloc();
1636 if (!msg || !ssids) {
1642 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1643 NL80211_CMD_TRIGGER_SCAN, 0);
1645 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1647 if (ssid && ssid_len) {
1648 /* Request an active scan for a specific SSID */
1649 NLA_PUT(ssids, 1, ssid_len, ssid);
1651 /* Request an active scan for wildcard SSID */
1652 NLA_PUT(ssids, 1, 0, "");
1654 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1656 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1659 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1660 "(%s)", ret, strerror(-ret));
1661 goto nla_put_failure;
1664 /* Not all drivers generate "scan completed" wireless event, so try to
1665 * read results after a timeout. */
1667 if (drv->scan_complete_events) {
1669 * The driver seems to deliver SIOCGIWSCAN events to notify
1670 * when scan is complete, so use longer timeout to avoid race
1671 * conditions with scanning and following association request.
1675 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1676 "seconds", ret, timeout);
1677 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1678 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1688 static int bss_info_handler(struct nl_msg *msg, void *arg)
1690 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1691 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1692 struct nlattr *bss[NL80211_BSS_MAX + 1];
1693 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1694 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1695 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1696 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1697 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1698 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1699 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1700 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1701 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1703 struct wpa_scan_results *res = arg;
1704 struct wpa_scan_res **tmp;
1705 struct wpa_scan_res *r;
1709 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1710 genlmsg_attrlen(gnlh, 0), NULL);
1711 if (!tb[NL80211_ATTR_BSS])
1713 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1716 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1717 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1718 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1724 r = os_zalloc(sizeof(*r) + ie_len);
1727 if (bss[NL80211_BSS_BSSID])
1728 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1730 if (bss[NL80211_BSS_FREQUENCY])
1731 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1732 if (bss[NL80211_BSS_BEACON_INTERVAL])
1733 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1734 if (bss[NL80211_BSS_CAPABILITY])
1735 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1736 if (bss[NL80211_BSS_SIGNAL_UNSPEC])
1737 r->qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1738 if (bss[NL80211_BSS_SIGNAL_MBM])
1739 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1740 if (bss[NL80211_BSS_TSF])
1741 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1744 os_memcpy(r + 1, ie, ie_len);
1746 tmp = os_realloc(res->res,
1747 (res->num + 1) * sizeof(struct wpa_scan_res *));
1752 tmp[res->num++] = r;
1760 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1761 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1762 * Returns: Scan results on success, -1 on failure
1764 static struct wpa_scan_results *
1765 wpa_driver_nl80211_get_scan_results(void *priv)
1767 struct wpa_driver_nl80211_data *drv = priv;
1769 struct wpa_scan_results *res;
1772 res = os_zalloc(sizeof(*res));
1775 msg = nlmsg_alloc();
1777 goto nla_put_failure;
1779 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1780 NL80211_CMD_GET_SCAN, 0);
1781 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1783 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1786 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1787 (unsigned long) res->num);
1790 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1791 "(%s)", ret, strerror(-ret));
1794 wpa_scan_results_free(res);
1799 static int wpa_driver_nl80211_get_range(void *priv)
1801 struct wpa_driver_nl80211_data *drv = priv;
1802 struct iw_range *range;
1808 * Use larger buffer than struct iw_range in order to allow the
1809 * structure to grow in the future.
1811 buflen = sizeof(struct iw_range) + 500;
1812 range = os_zalloc(buflen);
1816 os_memset(&iwr, 0, sizeof(iwr));
1817 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1818 iwr.u.data.pointer = (caddr_t) range;
1819 iwr.u.data.length = buflen;
1821 minlen = ((char *) &range->enc_capa) - (char *) range +
1822 sizeof(range->enc_capa);
1824 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1825 perror("ioctl[SIOCGIWRANGE]");
1828 } else if (iwr.u.data.length >= minlen &&
1829 range->we_version_compiled >= 18) {
1830 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1831 "WE(source)=%d enc_capa=0x%x",
1832 range->we_version_compiled,
1833 range->we_version_source,
1835 drv->has_capability = 1;
1836 drv->we_version_compiled = range->we_version_compiled;
1837 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1838 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1839 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1841 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1842 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1843 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1845 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1846 WPA_DRIVER_CAPA_ENC_WEP104;
1847 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1848 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1849 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1850 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1851 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1852 WPA_DRIVER_AUTH_SHARED |
1853 WPA_DRIVER_AUTH_LEAP;
1854 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x",
1855 drv->capa.key_mgmt, drv->capa.enc);
1857 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1858 "assuming WPA is not supported");
1866 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1868 struct wpa_driver_nl80211_data *drv = priv;
1869 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1871 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1876 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1877 const u8 *addr, int key_idx,
1878 int set_tx, const u8 *seq,
1880 const u8 *key, size_t key_len)
1882 struct wpa_driver_nl80211_data *drv = priv;
1886 wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1887 "seq_len=%lu key_len=%lu",
1888 __func__, alg, addr, key_idx, set_tx,
1889 (unsigned long) seq_len, (unsigned long) key_len);
1891 msg = nlmsg_alloc();
1895 if (alg == WPA_ALG_NONE) {
1896 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1897 NL80211_CMD_DEL_KEY, 0);
1899 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1900 NL80211_CMD_NEW_KEY, 0);
1901 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1905 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1908 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1912 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1915 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1917 #ifdef CONFIG_IEEE80211W
1919 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1921 #endif /* CONFIG_IEEE80211W */
1928 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1930 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1931 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1933 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1934 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1936 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1938 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1942 if (set_tx && alg != WPA_ALG_NONE) {
1943 msg = nlmsg_alloc();
1947 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1948 0, NL80211_CMD_SET_KEY, 0);
1949 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1950 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1951 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1953 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1955 wpa_printf(MSG_DEBUG, "nl80211: set default key "
1956 "failed; err=%d", err);
1968 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1971 struct wpa_driver_nl80211_data *drv = priv;
1972 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1973 return wpa_driver_nl80211_set_auth_param(drv,
1974 IW_AUTH_TKIP_COUNTERMEASURES,
1979 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
1982 struct wpa_driver_nl80211_data *drv = priv;
1983 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1984 drv->use_crypt = enabled;
1985 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1990 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1991 const u8 *addr, int cmd, int reason_code)
1994 struct iw_mlme mlme;
1997 os_memset(&iwr, 0, sizeof(iwr));
1998 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1999 os_memset(&mlme, 0, sizeof(mlme));
2001 mlme.reason_code = reason_code;
2002 mlme.addr.sa_family = ARPHRD_ETHER;
2003 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2004 iwr.u.data.pointer = (caddr_t) &mlme;
2005 iwr.u.data.length = sizeof(mlme);
2007 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2008 perror("ioctl[SIOCSIWMLME]");
2016 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2019 struct wpa_driver_nl80211_data *drv = priv;
2020 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2021 return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2025 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2028 struct wpa_driver_nl80211_data *drv = priv;
2029 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2030 return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2035 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2038 struct wpa_driver_nl80211_data *drv = priv;
2042 os_memset(&iwr, 0, sizeof(iwr));
2043 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2044 iwr.u.data.pointer = (caddr_t) ie;
2045 iwr.u.data.length = ie_len;
2047 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2048 perror("ioctl[SIOCSIWGENIE]");
2056 static int wpa_driver_nl80211_cipher2wext(int cipher)
2060 return IW_AUTH_CIPHER_NONE;
2062 return IW_AUTH_CIPHER_WEP40;
2064 return IW_AUTH_CIPHER_TKIP;
2066 return IW_AUTH_CIPHER_CCMP;
2068 return IW_AUTH_CIPHER_WEP104;
2075 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2078 case KEY_MGMT_802_1X:
2079 case KEY_MGMT_802_1X_NO_WPA:
2080 return IW_AUTH_KEY_MGMT_802_1X;
2082 return IW_AUTH_KEY_MGMT_PSK;
2090 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2091 struct wpa_driver_associate_params *params)
2096 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2097 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2099 os_memset(&iwr, 0, sizeof(iwr));
2100 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2101 /* Just changing mode, not actual keys */
2102 iwr.u.encoding.flags = 0;
2103 iwr.u.encoding.pointer = (caddr_t) NULL;
2104 iwr.u.encoding.length = 0;
2107 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2108 * different things. Here they are used to indicate Open System vs.
2109 * Shared Key authentication algorithm. However, some drivers may use
2110 * them to select between open/restricted WEP encrypted (open = allow
2111 * both unencrypted and encrypted frames; restricted = only allow
2112 * encrypted frames).
2115 if (!drv->use_crypt) {
2116 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2118 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2119 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2120 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2121 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2124 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2125 perror("ioctl[SIOCSIWENCODE]");
2133 static int wpa_driver_nl80211_associate(
2134 void *priv, struct wpa_driver_associate_params *params)
2136 struct wpa_driver_nl80211_data *drv = priv;
2138 int allow_unencrypted_eapol;
2141 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2144 * If the driver did not support SIOCSIWAUTH, fallback to
2145 * SIOCSIWENCODE here.
2147 if (drv->auth_alg_fallback &&
2148 wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2151 if (!params->bssid &&
2152 wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2155 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2156 * from configuration, not from here, where only the selected suite is
2158 if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2161 if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2162 value = IW_AUTH_WPA_VERSION_DISABLED;
2163 else if (params->wpa_ie[0] == WLAN_EID_RSN)
2164 value = IW_AUTH_WPA_VERSION_WPA2;
2166 value = IW_AUTH_WPA_VERSION_WPA;
2167 if (wpa_driver_nl80211_set_auth_param(drv,
2168 IW_AUTH_WPA_VERSION, value) < 0)
2170 value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2171 if (wpa_driver_nl80211_set_auth_param(drv,
2172 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2174 value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2175 if (wpa_driver_nl80211_set_auth_param(drv,
2176 IW_AUTH_CIPHER_GROUP, value) < 0)
2178 value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2179 if (wpa_driver_nl80211_set_auth_param(drv,
2180 IW_AUTH_KEY_MGMT, value) < 0)
2182 value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2183 params->pairwise_suite != CIPHER_NONE ||
2184 params->group_suite != CIPHER_NONE ||
2186 if (wpa_driver_nl80211_set_auth_param(drv,
2187 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2190 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2191 * not using WPA. IEEE 802.1X specifies that these frames are not
2192 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2193 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2194 params->key_mgmt_suite == KEY_MGMT_PSK)
2195 allow_unencrypted_eapol = 0;
2197 allow_unencrypted_eapol = 1;
2199 if (wpa_driver_nl80211_set_auth_param(drv,
2200 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2201 allow_unencrypted_eapol) < 0)
2203 if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2205 if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2207 if (params->bssid &&
2208 wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2215 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2217 struct wpa_driver_nl80211_data *drv = priv;
2220 if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2221 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2222 if (auth_alg & AUTH_ALG_SHARED_KEY)
2223 algs |= IW_AUTH_ALG_SHARED_KEY;
2224 if (auth_alg & AUTH_ALG_LEAP)
2225 algs |= IW_AUTH_ALG_LEAP;
2227 /* at least one algorithm should be set */
2228 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2231 res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2233 drv->auth_alg_fallback = res == -2;
2239 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2240 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2241 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2242 * Returns: 0 on success, -1 on failure
2244 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2246 struct wpa_driver_nl80211_data *drv = priv;
2247 int ret = -1, flags;
2250 msg = nlmsg_alloc();
2254 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2255 0, NL80211_CMD_SET_INTERFACE, 0);
2256 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2257 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2258 mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2260 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2267 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2268 ret, strerror(-ret));
2272 /* mac80211 doesn't allow mode changes while the device is up, so
2273 * take the device down, try to set the mode again, and bring the
2276 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2277 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2279 /* Try to set the mode again while the interface is down */
2280 msg = nlmsg_alloc();
2284 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2285 0, NL80211_CMD_SET_INTERFACE, 0);
2286 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2287 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2288 mode ? NL80211_IFTYPE_ADHOC :
2289 NL80211_IFTYPE_STATION);
2290 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2292 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2293 "mode(try_again): %d (%s)",
2294 drv->ifname, ret, strerror(-ret));
2297 /* Ignore return value of get_ifflags to ensure that the device
2298 * is always up like it was before this function was called.
2300 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2301 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2308 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2309 u32 cmd, const u8 *bssid, const u8 *pmkid)
2312 struct iw_pmksa pmksa;
2315 os_memset(&iwr, 0, sizeof(iwr));
2316 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2317 os_memset(&pmksa, 0, sizeof(pmksa));
2319 pmksa.bssid.sa_family = ARPHRD_ETHER;
2321 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2323 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2324 iwr.u.data.pointer = (caddr_t) &pmksa;
2325 iwr.u.data.length = sizeof(pmksa);
2327 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2328 if (errno != EOPNOTSUPP)
2329 perror("ioctl[SIOCSIWPMKSA]");
2337 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2340 struct wpa_driver_nl80211_data *drv = priv;
2341 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2345 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2348 struct wpa_driver_nl80211_data *drv = priv;
2349 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2353 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2355 struct wpa_driver_nl80211_data *drv = priv;
2356 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2360 static int wpa_driver_nl80211_get_capa(void *priv,
2361 struct wpa_driver_capa *capa)
2363 struct wpa_driver_nl80211_data *drv = priv;
2364 if (!drv->has_capability)
2366 os_memcpy(capa, &drv->capa, sizeof(*capa));
2371 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2373 struct wpa_driver_nl80211_data *drv = priv;
2375 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2376 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2377 drv->operstate = state;
2378 return wpa_driver_nl80211_send_oper_ifla(
2379 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2383 #ifdef CONFIG_CLIENT_MLME
2384 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2386 if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2387 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2391 if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2392 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2398 #endif /* CONFIG_CLIENT_MLME */
2401 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2403 #ifdef CONFIG_CLIENT_MLME
2404 struct wpa_driver_nl80211_data *drv = priv;
2409 wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2411 if (os_strstr(param, "use_mlme=1")) {
2412 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2413 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2415 if (wpa_driver_nl80211_open_mlme(drv))
2418 #endif /* CONFIG_CLIENT_MLME */
2424 #ifdef CONFIG_CLIENT_MLME
2426 struct phy_info_arg {
2428 struct wpa_hw_modes *modes;
2432 static int phy_info_handler(struct nl_msg *msg, void *arg)
2434 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2435 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2436 struct phy_info_arg *phy_info = arg;
2438 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2440 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2441 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2443 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2444 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2445 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2446 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2447 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2450 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2451 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2452 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2453 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2454 { .type = NLA_FLAG },
2457 struct nlattr *nl_band;
2458 struct nlattr *nl_freq;
2459 struct nlattr *nl_rate;
2460 int rem_band, rem_freq, rem_rate;
2461 struct wpa_hw_modes *mode;
2462 int idx, mode_is_set;
2464 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2465 genlmsg_attrlen(gnlh, 0), NULL);
2467 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2470 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2472 mode = os_realloc(phy_info->modes,
2473 (*phy_info->num_modes + 1) * sizeof(*mode));
2476 phy_info->modes = mode;
2480 mode = &phy_info->modes[*(phy_info->num_modes)];
2481 os_memset(mode, 0, sizeof(*mode));
2482 *(phy_info->num_modes) += 1;
2484 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2485 nla_len(nl_band), NULL);
2487 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2489 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2490 nla_data(nl_freq), nla_len(nl_freq),
2492 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2494 mode->num_channels++;
2497 mode->channels = os_zalloc(mode->num_channels *
2498 sizeof(struct wpa_channel_data));
2499 if (!mode->channels)
2504 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2506 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2507 nla_data(nl_freq), nla_len(nl_freq),
2509 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2512 mode->channels[idx].freq = nla_get_u32(
2513 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2514 mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2515 WPA_CHAN_W_ACTIVE_SCAN |
2519 /* crude heuristic */
2520 if (mode->channels[idx].freq < 4000)
2521 mode->mode = WPA_MODE_IEEE80211B;
2523 mode->mode = WPA_MODE_IEEE80211A;
2527 /* crude heuristic */
2528 if (mode->channels[idx].freq < 4000) {
2529 if (mode->channels[idx].freq == 2484)
2530 mode->channels[idx].chan = 14;
2532 mode->channels[idx].chan =
2533 (mode->channels[idx].freq -
2536 mode->channels[idx].chan =
2537 mode->channels[idx].freq / 5 - 1000;
2539 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2540 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2541 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2542 mode->channels[idx].flag &=
2543 ~WPA_CHAN_W_ACTIVE_SCAN;
2544 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2545 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2549 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2551 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2552 nla_data(nl_rate), nla_len(nl_rate),
2554 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2559 mode->rates = os_zalloc(mode->num_rates *
2560 sizeof(struct wpa_rate_data));
2566 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2568 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2569 nla_data(nl_rate), nla_len(nl_rate),
2571 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2573 mode->rates[idx].rate = nla_get_u32(
2574 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2576 /* crude heuristic */
2577 if (mode->mode == WPA_MODE_IEEE80211B &&
2578 mode->rates[idx].rate > 200)
2579 mode->mode = WPA_MODE_IEEE80211G;
2581 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2582 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2592 static struct wpa_hw_modes *
2593 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2595 struct wpa_driver_nl80211_data *drv = priv;
2597 struct phy_info_arg result = {
2598 .num_modes = num_modes,
2605 msg = nlmsg_alloc();
2609 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2610 0, NL80211_CMD_GET_WIPHY, 0);
2612 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2614 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2615 return result.modes;
2621 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2624 return wpa_driver_nl80211_set_freq(priv, freq);
2628 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2631 struct wpa_driver_nl80211_data *drv = priv;
2633 0x00, 0x00, /* radiotap version */
2634 0x0e, 0x00, /* radiotap length */
2635 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2636 0x0c, /* F_WEP | F_FRAG (encrypt/fragment if required) */
2638 0x00, 0x00, /* RX and TX flags to indicate that */
2639 0x00, 0x00, /* this is the injected frame directly */
2641 struct iovec iov[2] = {
2643 .iov_base = &rtap_hdr,
2644 .iov_len = sizeof(rtap_hdr),
2647 .iov_base = (void *) data,
2648 .iov_len = data_len,
2651 struct msghdr msg = {
2656 .msg_control = NULL,
2657 .msg_controllen = 0,
2661 if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2662 perror("send[MLME]");
2670 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2671 const u8 *supp_rates,
2672 size_t supp_rates_len)
2674 struct wpa_driver_nl80211_data *drv = priv;
2678 msg = nlmsg_alloc();
2682 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2683 0, NL80211_CMD_NEW_STATION, 0);
2685 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2686 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2687 /* TODO: Get proper Association ID and listen interval */
2688 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2689 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2691 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2693 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2694 /* ignore EEXIST, this happens if a STA associates while associated */
2695 if (ret == -EEXIST || ret >= 0)
2703 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2705 struct wpa_driver_nl80211_data *drv = priv;
2709 msg = nlmsg_alloc();
2713 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2714 0, NL80211_CMD_DEL_STATION, 0);
2716 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2717 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2721 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2728 #endif /* CONFIG_CLIENT_MLME */
2731 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2733 .desc = "Linux nl80211/cfg80211",
2734 .get_bssid = wpa_driver_nl80211_get_bssid,
2735 .get_ssid = wpa_driver_nl80211_get_ssid,
2736 .set_wpa = wpa_driver_nl80211_set_wpa,
2737 .set_key = wpa_driver_nl80211_set_key,
2738 .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2739 .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2740 .scan = wpa_driver_nl80211_scan,
2741 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2742 .deauthenticate = wpa_driver_nl80211_deauthenticate,
2743 .disassociate = wpa_driver_nl80211_disassociate,
2744 .set_mode = wpa_driver_nl80211_set_mode,
2745 .associate = wpa_driver_nl80211_associate,
2746 .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2747 .init = wpa_driver_nl80211_init,
2748 .deinit = wpa_driver_nl80211_deinit,
2749 .set_param = wpa_driver_nl80211_set_param,
2750 .add_pmkid = wpa_driver_nl80211_add_pmkid,
2751 .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2752 .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2753 .get_capa = wpa_driver_nl80211_get_capa,
2754 .set_operstate = wpa_driver_nl80211_set_operstate,
2755 .set_country = wpa_driver_nl80211_set_country,
2756 .set_probe_req_ie = wpa_driver_nl80211_set_probe_req_ie,
2757 #ifdef CONFIG_CLIENT_MLME
2758 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2759 .set_channel = wpa_driver_nl80211_set_channel,
2760 .set_ssid = wpa_driver_nl80211_set_ssid,
2761 .set_bssid = wpa_driver_nl80211_set_bssid,
2762 .send_mlme = wpa_driver_nl80211_send_mlme,
2763 .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2764 .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2765 #endif /* CONFIG_CLIENT_MLME */