2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009, Atheros Communications
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * Alternatively, this software may be distributed under the terms of BSD
16 * See README and COPYING for more details.
20 #include <sys/ioctl.h>
21 #include <net/if_arp.h>
23 #include <netlink/genl/genl.h>
24 #include <netlink/genl/family.h>
25 #include <netlink/genl/ctrl.h>
26 #include "nl80211_copy.h"
28 #include "wireless_copy.h"
34 #include "ieee802_11_defs.h"
36 #if defined(CONFIG_AP) || defined(HOSTAPD)
37 #include <netpacket/packet.h>
38 #include <linux/filter.h>
40 #include "radiotap_iter.h"
42 #include "../../hostapd/hostapd_defs.h"
43 #include "../../hostapd/sta_flags.h"
44 #endif /* CONFIG_AP || HOSTAPD */
47 #include "ieee802_11_common.h"
51 /* libnl 2.0 compatibility code */
52 #define nl_handle nl_sock
53 #define nl_handle_alloc_cb nl_socket_alloc_cb
54 #define nl_handle_destroy nl_socket_free
55 #endif /* CONFIG_LIBNL20 */
59 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
62 #define IFF_DORMANT 0x20000 /* driver signals dormant */
65 #ifndef IF_OPER_DORMANT
66 #define IF_OPER_DORMANT 5
73 struct i802_bss *next;
75 unsigned int beacon_set:1;
78 struct wpa_driver_nl80211_data {
81 int ioctl_sock; /* socket for ioctl() use */
82 char ifname[IFNAMSIZ + 1];
85 struct wpa_driver_capa capa;
90 int scan_complete_events;
92 struct nl_handle *nl_handle;
93 struct nl_handle *nl_handle_event;
94 struct nl_cache *nl_cache;
95 struct nl_cache *nl_cache_event;
97 struct genl_family *nl80211;
104 int ap_scan_as_station;
111 unsigned int beacon_set:1;
112 #endif /* CONFIG_AP */
115 int eapol_sock; /* socket for EAPOL frames */
117 int default_if_indices[16];
129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
135 #if defined(CONFIG_AP) || defined(HOSTAPD)
136 static void nl80211_remove_monitor_interface(
137 struct wpa_driver_nl80211_data *drv);
138 #endif /* CONFIG_AP || HOSTAPD */
141 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
143 #endif /* CONFIG_AP */
146 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
147 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
148 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
150 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
152 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
157 static int ack_handler(struct nl_msg *msg, void *arg)
164 static int finish_handler(struct nl_msg *msg, void *arg)
171 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
180 static int no_seq_check(struct nl_msg *msg, void *arg)
186 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
188 int (*valid_handler)(struct nl_msg *, void *),
194 cb = nl_cb_clone(drv->nl_cb);
198 err = nl_send_auto_complete(drv->nl_handle, msg);
204 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
205 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
206 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
209 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
210 valid_handler, valid_data);
213 nl_recvmsgs(drv->nl_handle, cb);
227 static int family_handler(struct nl_msg *msg, void *arg)
229 struct family_data *res = arg;
230 struct nlattr *tb[CTRL_ATTR_MAX + 1];
231 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
232 struct nlattr *mcgrp;
235 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
236 genlmsg_attrlen(gnlh, 0), NULL);
237 if (!tb[CTRL_ATTR_MCAST_GROUPS])
240 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
241 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
242 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
243 nla_len(mcgrp), NULL);
244 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
245 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
246 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
248 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
250 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
258 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
259 const char *family, const char *group)
263 struct family_data res = { group, -ENOENT };
268 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
269 0, 0, CTRL_CMD_GETFAMILY, 0);
270 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
272 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
284 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
285 const char *ifname, u8 *addr)
289 os_memset(&ifr, 0, sizeof(ifr));
290 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
291 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
292 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
293 ifname, errno, strerror(errno));
297 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
298 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
299 ifname, ifr.ifr_hwaddr.sa_family);
302 os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
308 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
309 const char *ifname, const u8 *addr)
313 os_memset(&ifr, 0, sizeof(ifr));
314 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
315 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
316 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
318 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
319 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
320 ifname, errno, strerror(errno));
331 static int wpa_driver_nl80211_send_oper_ifla(
332 struct wpa_driver_nl80211_data *drv,
333 int linkmode, int operstate)
337 struct ifinfomsg ifinfo;
344 os_memset(&req, 0, sizeof(req));
346 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
347 req.hdr.nlmsg_type = RTM_SETLINK;
348 req.hdr.nlmsg_flags = NLM_F_REQUEST;
349 req.hdr.nlmsg_seq = ++nl_seq;
350 req.hdr.nlmsg_pid = 0;
352 req.ifinfo.ifi_family = AF_UNSPEC;
353 req.ifinfo.ifi_type = 0;
354 req.ifinfo.ifi_index = drv->ifindex;
355 req.ifinfo.ifi_flags = 0;
356 req.ifinfo.ifi_change = 0;
358 if (linkmode != -1) {
359 rta = aliasing_hide_typecast(
360 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
362 rta->rta_type = IFLA_LINKMODE;
363 rta->rta_len = RTA_LENGTH(sizeof(char));
364 *((char *) RTA_DATA(rta)) = linkmode;
365 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
366 RTA_LENGTH(sizeof(char));
368 if (operstate != -1) {
369 rta = (struct rtattr *)
370 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
371 rta->rta_type = IFLA_OPERSTATE;
372 rta->rta_len = RTA_LENGTH(sizeof(char));
373 *((char *) RTA_DATA(rta)) = operstate;
374 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
375 RTA_LENGTH(sizeof(char));
378 wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
379 linkmode, operstate);
381 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
383 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
384 " %s (assume operstate is not supported)",
388 return ret < 0 ? -1 : 0;
393 static int wpa_driver_nl80211_set_auth_param(
394 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
399 os_memset(&iwr, 0, sizeof(iwr));
400 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
401 iwr.u.param.flags = idx & IW_AUTH_INDEX;
402 iwr.u.param.value = value;
404 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
405 if (errno != EOPNOTSUPP) {
406 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
407 "value 0x%x) failed: %s)",
408 idx, value, strerror(errno));
410 ret = errno == EOPNOTSUPP ? -2 : -1;
418 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
420 struct wpa_driver_nl80211_data *drv = priv;
421 if (!drv->associated)
423 os_memcpy(bssid, drv->bssid, ETH_ALEN);
428 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
430 struct wpa_driver_nl80211_data *drv = priv;
431 if (!drv->associated)
433 os_memcpy(ssid, drv->ssid, drv->ssid_len);
434 return drv->ssid_len;
438 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
439 void *ctx, char *buf, size_t len,
442 union wpa_event_data event;
444 os_memset(&event, 0, sizeof(event));
445 if (len > sizeof(event.interface_status.ifname))
446 len = sizeof(event.interface_status.ifname) - 1;
447 os_memcpy(event.interface_status.ifname, buf, len);
448 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
449 EVENT_INTERFACE_ADDED;
451 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
453 event.interface_status.ifname,
454 del ? "removed" : "added");
456 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
463 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
467 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
470 struct ifinfomsg *ifi;
471 int attrlen, _nlmsg_len, rta_len;
476 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
478 attrlen = h->nlmsg_len - _nlmsg_len;
482 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
484 rta_len = RTA_ALIGN(sizeof(struct rtattr));
485 while (RTA_OK(attr, attrlen)) {
486 if (attr->rta_type == IFLA_IFNAME) {
487 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
493 attr = RTA_NEXT(attr, attrlen);
500 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
501 int ifindex, struct nlmsghdr *h)
503 if (drv->ifindex == ifindex)
506 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
507 drv->ifindex = if_nametoindex(drv->ifname);
508 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
510 wpa_driver_nl80211_finish_drv_init(drv);
518 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
519 void *ctx, struct nlmsghdr *h,
522 struct ifinfomsg *ifi;
523 int attrlen, _nlmsg_len, rta_len;
524 struct rtattr * attr;
526 if (len < sizeof(*ifi))
531 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
532 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
537 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
539 drv->operstate, ifi->ifi_flags,
540 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
541 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
542 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
543 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
545 * Some drivers send the association event before the operup event--in
546 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
547 * fails. This will hit us when wpa_supplicant does not need to do
548 * IEEE 802.1X authentication
550 if (drv->operstate == 1 &&
551 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
552 !(ifi->ifi_flags & IFF_RUNNING))
553 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
555 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
557 attrlen = h->nlmsg_len - _nlmsg_len;
561 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
563 rta_len = RTA_ALIGN(sizeof(struct rtattr));
564 while (RTA_OK(attr, attrlen)) {
565 if (attr->rta_type == IFLA_IFNAME) {
566 wpa_driver_nl80211_event_link(
568 ((char *) attr) + rta_len,
569 attr->rta_len - rta_len, 0);
571 attr = RTA_NEXT(attr, attrlen);
576 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
577 void *ctx, struct nlmsghdr *h,
580 struct ifinfomsg *ifi;
581 int attrlen, _nlmsg_len, rta_len;
582 struct rtattr * attr;
584 if (len < sizeof(*ifi))
589 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
591 attrlen = h->nlmsg_len - _nlmsg_len;
595 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
597 rta_len = RTA_ALIGN(sizeof(struct rtattr));
598 while (RTA_OK(attr, attrlen)) {
599 if (attr->rta_type == IFLA_IFNAME) {
600 wpa_driver_nl80211_event_link(
602 ((char *) attr) + rta_len,
603 attr->rta_len - rta_len, 1);
605 attr = RTA_NEXT(attr, attrlen);
610 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
615 struct sockaddr_nl from;
621 fromlen = sizeof(from);
622 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
623 (struct sockaddr *) &from, &fromlen);
625 if (errno != EINTR && errno != EAGAIN)
626 perror("recvfrom(netlink)");
630 h = (struct nlmsghdr *) buf;
631 while (left >= (int) sizeof(*h)) {
635 plen = len - sizeof(*h);
636 if (len > left || plen < 0) {
637 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
638 "len=%d left=%d plen=%d",
643 switch (h->nlmsg_type) {
645 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
649 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
654 len = NLMSG_ALIGN(len);
656 h = (struct nlmsghdr *) ((char *) h + len);
660 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
664 if (--max_events > 0) {
666 * Try to receive all events in one eloop call in order to
667 * limit race condition on cases where AssocInfo event, Assoc
668 * event, and EAPOL frames are received more or less at the
669 * same time. We want to process the event messages first
670 * before starting EAPOL processing.
677 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
678 const u8 *frame, size_t len)
680 const struct ieee80211_mgmt *mgmt;
681 union wpa_event_data event;
683 mgmt = (const struct ieee80211_mgmt *) frame;
684 if (len < 24 + sizeof(mgmt->u.auth)) {
685 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
690 os_memset(&event, 0, sizeof(event));
691 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
692 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
693 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
694 if (len > 24 + sizeof(mgmt->u.auth)) {
695 event.auth.ies = mgmt->u.auth.variable;
696 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
699 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
703 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
704 const u8 *frame, size_t len)
706 const struct ieee80211_mgmt *mgmt;
707 union wpa_event_data event;
710 mgmt = (const struct ieee80211_mgmt *) frame;
711 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
712 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
717 status = le_to_host16(mgmt->u.assoc_resp.status_code);
718 if (status != WLAN_STATUS_SUCCESS) {
719 os_memset(&event, 0, sizeof(event));
720 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
721 event.assoc_reject.resp_ies =
722 (u8 *) mgmt->u.assoc_resp.variable;
723 event.assoc_reject.resp_ies_len =
724 len - 24 - sizeof(mgmt->u.assoc_resp);
726 event.assoc_reject.status_code = status;
728 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
733 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
735 os_memset(&event, 0, sizeof(event));
736 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
737 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
738 event.assoc_info.resp_ies_len =
739 len - 24 - sizeof(mgmt->u.assoc_resp);
742 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
745 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
746 enum nl80211_commands cmd, struct nlattr *status,
747 struct nlattr *addr, struct nlattr *req_ie,
748 struct nlattr *resp_ie)
750 union wpa_event_data event;
752 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
754 * Avoid reporting two association events that would confuse
757 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
758 "when using userspace SME", cmd);
762 os_memset(&event, 0, sizeof(event));
763 if (cmd == NL80211_CMD_CONNECT &&
764 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
766 event.assoc_reject.resp_ies = nla_data(resp_ie);
767 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
769 event.assoc_reject.status_code = nla_get_u16(status);
770 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
776 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
779 event.assoc_info.req_ies = nla_data(req_ie);
780 event.assoc_info.req_ies_len = nla_len(req_ie);
783 event.assoc_info.resp_ies = nla_data(resp_ie);
784 event.assoc_info.resp_ies_len = nla_len(resp_ie);
787 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
790 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
791 enum nl80211_commands cmd, struct nlattr *addr)
793 union wpa_event_data event;
794 enum wpa_event_type ev;
796 if (nla_len(addr) != ETH_ALEN)
799 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
800 cmd, MAC2STR((u8 *) nla_data(addr)));
802 if (cmd == NL80211_CMD_AUTHENTICATE)
803 ev = EVENT_AUTH_TIMED_OUT;
804 else if (cmd == NL80211_CMD_ASSOCIATE)
805 ev = EVENT_ASSOC_TIMED_OUT;
809 os_memset(&event, 0, sizeof(event));
810 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
811 wpa_supplicant_event(drv->ctx, ev, &event);
815 static void mlme_event(struct wpa_driver_nl80211_data *drv,
816 enum nl80211_commands cmd, struct nlattr *frame,
817 struct nlattr *addr, struct nlattr *timed_out)
819 if (timed_out && addr) {
820 mlme_timeout_event(drv, cmd, addr);
825 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
830 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
831 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
832 nla_data(frame), nla_len(frame));
835 case NL80211_CMD_AUTHENTICATE:
836 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
838 case NL80211_CMD_ASSOCIATE:
839 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
841 case NL80211_CMD_DEAUTHENTICATE:
843 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
845 case NL80211_CMD_DISASSOCIATE:
847 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
857 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
860 union wpa_event_data data;
862 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
863 os_memset(&data, 0, sizeof(data));
864 if (tb[NL80211_ATTR_MAC]) {
865 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
866 nla_data(tb[NL80211_ATTR_MAC]),
867 nla_len(tb[NL80211_ATTR_MAC]));
868 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
870 if (tb[NL80211_ATTR_KEY_SEQ]) {
871 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
872 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
873 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
875 if (tb[NL80211_ATTR_KEY_TYPE]) {
876 enum nl80211_key_type key_type =
877 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
878 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
879 if (key_type == NL80211_KEYTYPE_PAIRWISE)
880 data.michael_mic_failure.unicast = 1;
882 data.michael_mic_failure.unicast = 1;
884 if (tb[NL80211_ATTR_KEY_IDX]) {
885 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
886 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
889 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
893 static int process_event(struct nl_msg *msg, void *arg)
895 struct wpa_driver_nl80211_data *drv = arg;
896 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
897 struct nlattr *tb[NL80211_ATTR_MAX + 1];
899 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
900 genlmsg_attrlen(gnlh, 0), NULL);
902 if (tb[NL80211_ATTR_IFINDEX]) {
903 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
904 if (ifindex != drv->ifindex) {
905 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
906 " for foreign interface (ifindex %d)",
912 if (drv->ap_scan_as_station &&
913 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
914 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
915 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
916 drv->ap_scan_as_station = 0;
920 case NL80211_CMD_TRIGGER_SCAN:
921 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
923 case NL80211_CMD_NEW_SCAN_RESULTS:
924 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
925 drv->scan_complete_events = 1;
926 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
928 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
930 case NL80211_CMD_SCAN_ABORTED:
931 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
933 * Need to indicate that scan results are available in order
934 * not to make wpa_supplicant stop its scanning.
936 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
938 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
941 case NL80211_CMD_AUTHENTICATE:
942 case NL80211_CMD_ASSOCIATE:
943 case NL80211_CMD_DEAUTHENTICATE:
944 case NL80211_CMD_DISASSOCIATE:
945 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
946 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
948 case NL80211_CMD_CONNECT:
949 case NL80211_CMD_ROAM:
950 mlme_event_connect(drv, gnlh->cmd,
951 tb[NL80211_ATTR_STATUS_CODE],
952 tb[NL80211_ATTR_MAC],
953 tb[NL80211_ATTR_REQ_IE],
954 tb[NL80211_ATTR_RESP_IE]);
956 case NL80211_CMD_DISCONNECT:
957 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
959 * Avoid reporting two disassociation events that could
960 * confuse the core code.
962 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
963 "event when using userspace SME");
967 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
970 case NL80211_CMD_MICHAEL_MIC_FAILURE:
971 mlme_event_michael_mic_failure(drv, tb);
974 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
975 "(cmd=%d)", gnlh->cmd);
983 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
987 struct wpa_driver_nl80211_data *drv = eloop_ctx;
989 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
991 cb = nl_cb_clone(drv->nl_cb);
994 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
995 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
996 nl_recvmsgs(drv->nl_handle_event, cb);
1001 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
1002 const char *ifname, int dev_up)
1006 if (drv->ioctl_sock < 0)
1009 os_memset(&ifr, 0, sizeof(ifr));
1010 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1012 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
1013 perror("ioctl[SIOCGIFFLAGS]");
1014 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
1020 if (ifr.ifr_flags & IFF_UP)
1022 ifr.ifr_flags |= IFF_UP;
1024 if (!(ifr.ifr_flags & IFF_UP))
1026 ifr.ifr_flags &= ~IFF_UP;
1029 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
1030 perror("ioctl[SIOCSIFFLAGS]");
1039 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1040 * @priv: driver_nl80211 private data
1041 * @alpha2_arg: country to which to switch to
1042 * Returns: 0 on success, -1 on failure
1044 * This asks nl80211 to set the regulatory domain for given
1045 * country ISO / IEC alpha2.
1047 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1049 struct wpa_driver_nl80211_data *drv = priv;
1053 msg = nlmsg_alloc();
1057 alpha2[0] = alpha2_arg[0];
1058 alpha2[1] = alpha2_arg[1];
1061 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1062 0, NL80211_CMD_REQ_SET_REG, 0);
1064 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1065 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1074 struct wiphy_info_data {
1078 int connect_supported;
1082 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1084 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1085 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1086 struct wiphy_info_data *info = arg;
1088 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1089 genlmsg_attrlen(gnlh, 0), NULL);
1091 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1092 info->max_scan_ssids =
1093 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1095 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1096 struct nlattr *nl_mode;
1098 nla_for_each_nested(nl_mode,
1099 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1100 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1101 info->ap_supported = 1;
1107 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1108 struct nlattr *nl_cmd;
1111 nla_for_each_nested(nl_cmd,
1112 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1113 u32 cmd = nla_get_u32(nl_cmd);
1114 if (cmd == NL80211_CMD_AUTHENTICATE)
1115 info->auth_supported = 1;
1116 else if (cmd == NL80211_CMD_CONNECT)
1117 info->connect_supported = 1;
1125 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1126 struct wiphy_info_data *info)
1130 os_memset(info, 0, sizeof(*info));
1131 msg = nlmsg_alloc();
1135 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1136 0, NL80211_CMD_GET_WIPHY, 0);
1138 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1140 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1149 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1151 struct wiphy_info_data info;
1152 if (wpa_driver_nl80211_get_info(drv, &info))
1154 drv->has_capability = 1;
1155 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1156 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1157 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1158 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1159 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1160 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1161 WPA_DRIVER_CAPA_ENC_WEP104 |
1162 WPA_DRIVER_CAPA_ENC_TKIP |
1163 WPA_DRIVER_CAPA_ENC_CCMP;
1165 drv->capa.max_scan_ssids = info.max_scan_ssids;
1166 if (info.ap_supported)
1167 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1169 if (info.auth_supported)
1170 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1171 else if (!info.connect_supported) {
1172 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1173 "authentication/association or connect commands");
1177 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1181 #endif /* HOSTAPD */
1184 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1189 /* Initialize generic netlink and nl80211 */
1191 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1192 if (drv->nl_cb == NULL) {
1193 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1198 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1199 if (drv->nl_handle == NULL) {
1200 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1205 drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1206 if (drv->nl_handle_event == NULL) {
1207 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1208 "callbacks (event)");
1212 if (genl_connect(drv->nl_handle)) {
1213 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1218 if (genl_connect(drv->nl_handle_event)) {
1219 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1224 #ifdef CONFIG_LIBNL20
1225 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1226 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1230 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1232 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1233 "netlink cache (event)");
1236 #else /* CONFIG_LIBNL20 */
1237 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1238 if (drv->nl_cache == NULL) {
1239 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1243 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1244 if (drv->nl_cache_event == NULL) {
1245 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1246 "netlink cache (event)");
1249 #endif /* CONFIG_LIBNL20 */
1251 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1252 if (drv->nl80211 == NULL) {
1253 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1258 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1260 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1262 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1263 "membership for scan events: %d (%s)",
1264 ret, strerror(-ret));
1268 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1270 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1272 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1273 "membership for mlme events: %d (%s)",
1274 ret, strerror(-ret));
1278 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1279 wpa_driver_nl80211_event_receive, drv, ctx);
1284 nl_cache_free(drv->nl_cache_event);
1286 nl_cache_free(drv->nl_cache);
1288 nl_handle_destroy(drv->nl_handle_event);
1290 nl_handle_destroy(drv->nl_handle);
1292 nl_cb_put(drv->nl_cb);
1298 static int wpa_driver_nl80211_init_link_events(
1299 struct wpa_driver_nl80211_data *drv)
1305 struct sockaddr_nl local;
1307 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1309 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1313 os_memset(&local, 0, sizeof(local));
1314 local.nl_family = AF_NETLINK;
1315 local.nl_groups = RTMGRP_LINK;
1316 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1317 perror("bind(netlink)");
1322 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1324 drv->link_event_sock = s;
1327 #endif /* HOSTAPD */
1332 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1333 * @ctx: context to be used when calling wpa_supplicant functions,
1334 * e.g., wpa_supplicant_event()
1335 * @ifname: interface name, e.g., wlan0
1336 * Returns: Pointer to private data, %NULL on failure
1338 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1340 struct wpa_driver_nl80211_data *drv;
1342 drv = os_zalloc(sizeof(*drv));
1346 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1347 drv->monitor_ifidx = -1;
1348 drv->monitor_sock = -1;
1349 drv->link_event_sock = -1;
1350 drv->ioctl_sock = -1;
1352 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1357 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1358 if (drv->ioctl_sock < 0) {
1359 perror("socket(PF_INET,SOCK_DGRAM)");
1363 if (wpa_driver_nl80211_init_link_events(drv) ||
1364 wpa_driver_nl80211_finish_drv_init(drv))
1370 if (drv->link_event_sock >= 0) {
1371 eloop_unregister_read_sock(drv->link_event_sock);
1372 close(drv->link_event_sock);
1374 if (drv->ioctl_sock >= 0)
1375 close(drv->ioctl_sock);
1377 genl_family_put(drv->nl80211);
1378 nl_cache_free(drv->nl_cache);
1379 nl_handle_destroy(drv->nl_handle);
1380 nl_cb_put(drv->nl_cb);
1388 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1390 drv->ifindex = if_nametoindex(drv->ifname);
1393 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1394 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1395 "use managed mode");
1398 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1399 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1404 if (wpa_driver_nl80211_capa(drv))
1407 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1408 #endif /* HOSTAPD */
1415 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1417 struct i802_bss *bss, *prev;
1418 bss = drv->bss.next;
1425 #endif /* HOSTAPD */
1428 #if defined(CONFIG_AP) || defined(HOSTAPD)
1429 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1433 msg = nlmsg_alloc();
1437 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1438 0, NL80211_CMD_DEL_BEACON, 0);
1439 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1441 return send_and_recv_msgs(drv, msg, NULL, NULL);
1445 #endif /* CONFIG_AP || HOSTAPD */
1449 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1450 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1452 * Shut down driver interface and processing of driver events. Free
1453 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1455 static void wpa_driver_nl80211_deinit(void *priv)
1457 struct wpa_driver_nl80211_data *drv = priv;
1459 #if defined(CONFIG_AP) || defined(HOSTAPD)
1460 nl80211_remove_monitor_interface(drv);
1461 if (drv->monitor_sock >= 0) {
1462 eloop_unregister_read_sock(drv->monitor_sock);
1463 close(drv->monitor_sock);
1466 if (drv->nlmode == NL80211_IFTYPE_AP)
1467 wpa_driver_nl80211_del_beacon(drv);
1468 #endif /* CONFIG_AP || HOSTAPD */
1471 if (drv->last_freq_ht) {
1472 /* Clear HT flags from the driver */
1473 struct hostapd_freq_params freq;
1474 os_memset(&freq, 0, sizeof(freq));
1475 freq.freq = drv->last_freq;
1476 i802_set_freq(priv, &freq);
1479 if (drv->eapol_sock >= 0) {
1480 eloop_unregister_read_sock(drv->eapol_sock);
1481 close(drv->eapol_sock);
1484 if (drv->if_indices != drv->default_if_indices)
1485 os_free(drv->if_indices);
1487 wpa_driver_nl80211_free_bss(drv);
1490 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1491 #endif /* NO_WEXT */
1493 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1495 if (drv->link_event_sock >= 0) {
1496 eloop_unregister_read_sock(drv->link_event_sock);
1497 close(drv->link_event_sock);
1499 #endif /* HOSTAPD */
1501 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1503 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1504 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1506 if (drv->ioctl_sock >= 0)
1507 close(drv->ioctl_sock);
1509 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1510 genl_family_put(drv->nl80211);
1511 nl_cache_free(drv->nl_cache);
1512 nl_cache_free(drv->nl_cache_event);
1513 nl_handle_destroy(drv->nl_handle);
1514 nl_handle_destroy(drv->nl_handle_event);
1515 nl_cb_put(drv->nl_cb);
1522 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1523 * @eloop_ctx: Driver private data
1524 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1526 * This function can be used as registered timeout when starting a scan to
1527 * generate a scan completed event if the driver does not report this.
1529 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1531 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1532 if (drv->ap_scan_as_station) {
1533 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1534 drv->ap_scan_as_station = 0;
1536 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1537 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1542 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1543 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1544 * @params: Scan parameters
1545 * Returns: 0 on success, -1 on failure
1547 static int wpa_driver_nl80211_scan(void *priv,
1548 struct wpa_driver_scan_params *params)
1550 struct wpa_driver_nl80211_data *drv = priv;
1551 int ret = 0, timeout;
1552 struct nl_msg *msg, *ssids, *freqs;
1555 msg = nlmsg_alloc();
1556 ssids = nlmsg_alloc();
1557 freqs = nlmsg_alloc();
1558 if (!msg || !ssids || !freqs) {
1565 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1566 NL80211_CMD_TRIGGER_SCAN, 0);
1568 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1570 for (i = 0; i < params->num_ssids; i++) {
1571 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1572 params->ssids[i].ssid);
1574 if (params->num_ssids)
1575 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1577 if (params->extra_ies) {
1578 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1582 if (params->freqs) {
1583 for (i = 0; params->freqs[i]; i++)
1584 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1585 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1588 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1591 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1592 "(%s)", ret, strerror(-ret));
1594 if (drv->nlmode == NL80211_IFTYPE_AP) {
1596 * mac80211 does not allow scan requests in AP mode, so
1597 * try to do this in station mode.
1599 if (wpa_driver_nl80211_set_mode(drv,
1600 IEEE80211_MODE_INFRA))
1601 goto nla_put_failure;
1603 if (wpa_driver_nl80211_scan(drv, params)) {
1604 wpa_driver_nl80211_set_mode(drv,
1606 goto nla_put_failure;
1609 /* Restore AP mode when processing scan results */
1610 drv->ap_scan_as_station = 1;
1613 goto nla_put_failure;
1615 goto nla_put_failure;
1616 #endif /* HOSTAPD */
1619 /* Not all drivers generate "scan completed" wireless event, so try to
1620 * read results after a timeout. */
1622 if (drv->scan_complete_events) {
1624 * The driver seems to deliver events to notify when scan is
1625 * complete, so use longer timeout to avoid race conditions
1626 * with scanning and following association request.
1630 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1631 "seconds", ret, timeout);
1632 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1633 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1644 static int bss_info_handler(struct nl_msg *msg, void *arg)
1646 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1647 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1648 struct nlattr *bss[NL80211_BSS_MAX + 1];
1649 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1650 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1651 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1652 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1653 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1654 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1655 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1656 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1657 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1658 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1660 struct wpa_scan_results *res = arg;
1661 struct wpa_scan_res **tmp;
1662 struct wpa_scan_res *r;
1666 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1667 genlmsg_attrlen(gnlh, 0), NULL);
1668 if (!tb[NL80211_ATTR_BSS])
1670 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1673 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1674 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1675 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1681 r = os_zalloc(sizeof(*r) + ie_len);
1684 if (bss[NL80211_BSS_BSSID])
1685 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1687 if (bss[NL80211_BSS_FREQUENCY])
1688 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1689 if (bss[NL80211_BSS_BEACON_INTERVAL])
1690 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1691 if (bss[NL80211_BSS_CAPABILITY])
1692 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1693 r->flags |= WPA_SCAN_NOISE_INVALID;
1694 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1695 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1696 r->level /= 100; /* mBm to dBm */
1697 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1698 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1699 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1700 r->flags |= WPA_SCAN_LEVEL_INVALID;
1702 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1703 if (bss[NL80211_BSS_TSF])
1704 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1705 if (bss[NL80211_BSS_SEEN_MS_AGO])
1706 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1709 os_memcpy(r + 1, ie, ie_len);
1711 tmp = os_realloc(res->res,
1712 (res->num + 1) * sizeof(struct wpa_scan_res *));
1717 tmp[res->num++] = r;
1725 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1726 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1727 * Returns: Scan results on success, -1 on failure
1729 static struct wpa_scan_results *
1730 wpa_driver_nl80211_get_scan_results(void *priv)
1732 struct wpa_driver_nl80211_data *drv = priv;
1734 struct wpa_scan_results *res;
1737 res = os_zalloc(sizeof(*res));
1740 msg = nlmsg_alloc();
1742 goto nla_put_failure;
1744 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1745 NL80211_CMD_GET_SCAN, 0);
1746 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1748 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1751 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1752 (unsigned long) res->num);
1755 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1756 "(%s)", ret, strerror(-ret));
1759 wpa_scan_results_free(res);
1764 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1765 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1766 const u8 *seq, size_t seq_len,
1767 const u8 *key, size_t key_len)
1772 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1773 "set_tx=%d seq_len=%lu key_len=%lu",
1774 __func__, ifindex, alg, addr, key_idx, set_tx,
1775 (unsigned long) seq_len, (unsigned long) key_len);
1777 msg = nlmsg_alloc();
1781 if (alg == WPA_ALG_NONE) {
1782 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1783 0, NL80211_CMD_DEL_KEY, 0);
1785 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1786 0, NL80211_CMD_NEW_KEY, 0);
1787 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1791 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1792 WLAN_CIPHER_SUITE_WEP40);
1794 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1795 WLAN_CIPHER_SUITE_WEP104);
1798 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1799 WLAN_CIPHER_SUITE_TKIP);
1802 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1803 WLAN_CIPHER_SUITE_CCMP);
1806 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1807 WLAN_CIPHER_SUITE_AES_CMAC);
1810 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1811 "algorithm %d", __func__, alg);
1818 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1820 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1822 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1823 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1825 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1826 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1828 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1829 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1832 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1833 ret, strerror(-ret));
1836 * If we failed or don't need to set the default TX key (below),
1839 if (ret || !set_tx || alg == WPA_ALG_NONE)
1841 #ifdef HOSTAPD /* FIX: is this needed? */
1844 #endif /* HOSTAPD */
1846 msg = nlmsg_alloc();
1850 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1851 0, NL80211_CMD_SET_KEY, 0);
1852 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1853 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1854 if (alg == WPA_ALG_IGTK)
1855 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1857 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1859 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1863 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1864 "err=%d %s)", ret, strerror(-ret));
1873 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1874 int key_idx, int defkey,
1875 const u8 *seq, size_t seq_len,
1876 const u8 *key, size_t key_len)
1878 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1882 if (defkey && alg == WPA_ALG_IGTK)
1883 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1885 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1887 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1892 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1893 WLAN_CIPHER_SUITE_WEP40);
1895 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1896 WLAN_CIPHER_SUITE_WEP104);
1899 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1902 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1905 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1906 WLAN_CIPHER_SUITE_AES_CMAC);
1909 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1910 "algorithm %d", __func__, alg);
1915 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1917 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1919 nla_nest_end(msg, key_attr);
1927 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1931 struct nlattr *nl_keys, *nl_key;
1933 for (i = 0; i < 4; i++) {
1934 if (!params->wep_key[i])
1942 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1944 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1946 goto nla_put_failure;
1948 for (i = 0; i < 4; i++) {
1949 if (!params->wep_key[i])
1952 nl_key = nla_nest_start(msg, i);
1954 goto nla_put_failure;
1956 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1957 params->wep_key[i]);
1958 if (params->wep_key_len[i] == 5)
1959 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1960 WLAN_CIPHER_SUITE_WEP40);
1962 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1963 WLAN_CIPHER_SUITE_WEP104);
1965 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1967 if (i == params->wep_tx_keyidx)
1968 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1970 nla_nest_end(msg, nl_key);
1972 nla_nest_end(msg, nl_keys);
1981 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1982 const u8 *addr, int key_idx,
1983 int set_tx, const u8 *seq,
1985 const u8 *key, size_t key_len)
1987 struct wpa_driver_nl80211_data *drv = priv;
1988 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1989 seq_len, key, key_len);
1993 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1994 const u8 *addr, int cmd, u16 reason_code)
1999 msg = nlmsg_alloc();
2003 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2005 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2006 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2007 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2009 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2012 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2013 "(%s)", ret, strerror(-ret));
2014 goto nla_put_failure;
2024 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2025 const u8 *addr, int reason_code)
2027 wpa_printf(MSG_DEBUG, "%s", __func__);
2028 drv->associated = 0;
2029 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2034 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2037 struct wpa_driver_nl80211_data *drv = priv;
2038 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2039 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2040 wpa_printf(MSG_DEBUG, "%s", __func__);
2041 drv->associated = 0;
2042 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2047 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2050 struct wpa_driver_nl80211_data *drv = priv;
2051 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2052 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2053 wpa_printf(MSG_DEBUG, "%s", __func__);
2054 drv->associated = 0;
2055 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2060 static int wpa_driver_nl80211_authenticate(
2061 void *priv, struct wpa_driver_auth_params *params)
2063 struct wpa_driver_nl80211_data *drv = priv;
2066 enum nl80211_auth_type type;
2069 drv->associated = 0;
2072 msg = nlmsg_alloc();
2076 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2079 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2080 NL80211_CMD_AUTHENTICATE, 0);
2082 for (i = 0; i < 4; i++) {
2083 if (!params->wep_key[i])
2085 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
2086 i == params->wep_tx_keyidx, NULL, 0,
2088 params->wep_key_len[i]);
2089 if (params->wep_tx_keyidx != i)
2091 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2092 params->wep_key[i], params->wep_key_len[i])) {
2098 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2099 if (params->bssid) {
2100 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2101 MAC2STR(params->bssid));
2102 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2105 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2106 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2109 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2110 params->ssid, params->ssid_len);
2111 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2114 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
2116 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2118 * TODO: if multiple auth_alg options enabled, try them one by one if
2119 * the AP rejects authentication due to unknown auth alg
2121 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2122 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2123 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2124 type = NL80211_AUTHTYPE_SHARED_KEY;
2125 else if (params->auth_alg & AUTH_ALG_LEAP)
2126 type = NL80211_AUTHTYPE_NETWORK_EAP;
2127 else if (params->auth_alg & AUTH_ALG_FT)
2128 type = NL80211_AUTHTYPE_FT;
2130 goto nla_put_failure;
2131 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
2132 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2134 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2137 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2138 "(%s)", ret, strerror(-ret));
2140 if (ret == -EALREADY && count == 1 && params->bssid) {
2142 * mac80211 does not currently accept new
2143 * authentication if we are already authenticated. As a
2144 * workaround, force deauthentication and try again.
2146 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2147 "after forced deauthentication");
2148 wpa_driver_nl80211_deauthenticate(
2150 WLAN_REASON_PREV_AUTH_NOT_VALID);
2154 goto nla_put_failure;
2157 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2165 #endif /* HOSTAPD */
2168 #if defined(CONFIG_AP) || defined(HOSTAPD)
2170 struct phy_info_arg {
2172 struct hostapd_hw_modes *modes;
2175 static int phy_info_handler(struct nl_msg *msg, void *arg)
2177 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2178 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2179 struct phy_info_arg *phy_info = arg;
2181 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2183 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2184 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2185 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2186 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2187 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2188 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2189 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2190 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2193 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2194 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2195 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2196 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2199 struct nlattr *nl_band;
2200 struct nlattr *nl_freq;
2201 struct nlattr *nl_rate;
2202 int rem_band, rem_freq, rem_rate;
2203 struct hostapd_hw_modes *mode;
2204 int idx, mode_is_set;
2206 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2207 genlmsg_attrlen(gnlh, 0), NULL);
2209 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2212 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2213 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2216 phy_info->modes = mode;
2220 mode = &phy_info->modes[*(phy_info->num_modes)];
2221 memset(mode, 0, sizeof(*mode));
2222 *(phy_info->num_modes) += 1;
2224 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2225 nla_len(nl_band), NULL);
2227 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2228 mode->ht_capab = nla_get_u16(
2229 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2232 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2233 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2235 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2236 os_memcpy(mode->mcs_set, mcs, 16);
2239 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2240 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2241 nla_len(nl_freq), freq_policy);
2242 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2244 mode->num_channels++;
2247 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2248 if (!mode->channels)
2253 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2254 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2255 nla_len(nl_freq), freq_policy);
2256 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2259 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2260 mode->channels[idx].flag = 0;
2263 /* crude heuristic */
2264 if (mode->channels[idx].freq < 4000)
2265 mode->mode = HOSTAPD_MODE_IEEE80211B;
2267 mode->mode = HOSTAPD_MODE_IEEE80211A;
2271 /* crude heuristic */
2272 if (mode->channels[idx].freq < 4000)
2273 if (mode->channels[idx].freq == 2484)
2274 mode->channels[idx].chan = 14;
2276 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2278 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2280 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2281 mode->channels[idx].flag |=
2282 HOSTAPD_CHAN_DISABLED;
2283 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2284 mode->channels[idx].flag |=
2285 HOSTAPD_CHAN_PASSIVE_SCAN;
2286 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2287 mode->channels[idx].flag |=
2288 HOSTAPD_CHAN_NO_IBSS;
2289 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2290 mode->channels[idx].flag |=
2293 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2294 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2295 mode->channels[idx].max_tx_power =
2296 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2301 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2302 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2303 nla_len(nl_rate), rate_policy);
2304 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2309 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2315 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2316 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2317 nla_len(nl_rate), rate_policy);
2318 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2320 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2322 /* crude heuristic */
2323 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2324 mode->rates[idx].rate > 200)
2325 mode->mode = HOSTAPD_MODE_IEEE80211G;
2327 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2328 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2337 static struct hostapd_hw_modes *
2338 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2341 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2342 int i, mode11g_idx = -1;
2344 /* If only 802.11g mode is included, use it to construct matching
2345 * 802.11b mode data. */
2347 for (m = 0; m < *num_modes; m++) {
2348 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2349 return modes; /* 802.11b already included */
2350 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2354 if (mode11g_idx < 0)
2355 return modes; /* 2.4 GHz band not supported at all */
2357 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2359 return modes; /* Could not add 802.11b mode */
2361 mode = &nmodes[*num_modes];
2362 os_memset(mode, 0, sizeof(*mode));
2366 mode->mode = HOSTAPD_MODE_IEEE80211B;
2368 mode11g = &modes[mode11g_idx];
2369 mode->num_channels = mode11g->num_channels;
2370 mode->channels = os_malloc(mode11g->num_channels *
2371 sizeof(struct hostapd_channel_data));
2372 if (mode->channels == NULL) {
2374 return modes; /* Could not add 802.11b mode */
2376 os_memcpy(mode->channels, mode11g->channels,
2377 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2379 mode->num_rates = 0;
2380 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2381 if (mode->rates == NULL) {
2382 os_free(mode->channels);
2384 return modes; /* Could not add 802.11b mode */
2387 for (i = 0; i < mode11g->num_rates; i++) {
2388 if (mode11g->rates[i].rate > 110 ||
2389 mode11g->rates[i].flags &
2390 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2392 mode->rates[mode->num_rates] = mode11g->rates[i];
2394 if (mode->num_rates == 4)
2398 if (mode->num_rates == 0) {
2399 os_free(mode->channels);
2400 os_free(mode->rates);
2402 return modes; /* No 802.11b rates */
2405 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2412 static struct hostapd_hw_modes *
2413 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2415 struct wpa_driver_nl80211_data *drv = priv;
2417 struct phy_info_arg result = {
2418 .num_modes = num_modes,
2425 msg = nlmsg_alloc();
2429 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2430 0, NL80211_CMD_GET_WIPHY, 0);
2432 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2434 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2435 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2441 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2442 const void *data, size_t len,
2446 0x00, 0x00, /* radiotap version */
2447 0x0e, 0x00, /* radiotap length */
2448 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2449 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2451 0x00, 0x00, /* RX and TX flags to indicate that */
2452 0x00, 0x00, /* this is the injected frame directly */
2454 struct iovec iov[2] = {
2456 .iov_base = &rtap_hdr,
2457 .iov_len = sizeof(rtap_hdr),
2460 .iov_base = (void *) data,
2464 struct msghdr msg = {
2469 .msg_control = NULL,
2470 .msg_controllen = 0,
2475 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2477 return sendmsg(drv->monitor_sock, &msg, 0);
2481 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2484 struct wpa_driver_nl80211_data *drv = priv;
2485 struct ieee80211_mgmt *mgmt;
2489 mgmt = (struct ieee80211_mgmt *) data;
2490 fc = le_to_host16(mgmt->frame_control);
2492 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2493 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2495 * Only one of the authentication frame types is encrypted.
2496 * In order for static WEP encryption to work properly (i.e.,
2497 * to not encrypt the frame), we need to tell mac80211 about
2498 * the frames that must not be encrypted.
2500 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2501 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2502 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2506 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2510 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2511 const u8 *head, size_t head_len,
2512 const u8 *tail, size_t tail_len,
2515 struct wpa_driver_nl80211_data *drv = priv;
2517 u8 cmd = NL80211_CMD_NEW_BEACON;
2521 struct i802_bss *bss;
2523 bss = get_bss(drv, ifindex);
2526 beacon_set = bss->beacon_set;
2528 beacon_set = drv->beacon_set;
2529 #endif /* HOSTAPD */
2531 msg = nlmsg_alloc();
2535 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2538 cmd = NL80211_CMD_SET_BEACON;
2540 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2542 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2543 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2544 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2545 if (!drv->beacon_int)
2546 drv->beacon_int = 100;
2547 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2548 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2550 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2552 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2553 ret, strerror(-ret));
2556 bss->beacon_set = 1;
2558 drv->beacon_set = 1;
2559 #endif /* HOSTAPD */
2567 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2569 struct wpa_driver_nl80211_data *drv = priv;
2572 drv->beacon_int = value;
2575 if (!drv->bss.beacon_set)
2578 if (!drv->beacon_set)
2580 #endif /* HOSTAPD */
2582 msg = nlmsg_alloc();
2586 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2587 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2588 0, NL80211_CMD_SET_BEACON, 0);
2589 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2591 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2593 return send_and_recv_msgs(drv, msg, NULL, NULL);
2599 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2600 int freq, int ht_enabled,
2601 int sec_channel_offset)
2606 msg = nlmsg_alloc();
2610 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2611 NL80211_CMD_SET_WIPHY, 0);
2613 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2614 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2616 switch (sec_channel_offset) {
2618 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2619 NL80211_CHAN_HT40MINUS);
2622 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2623 NL80211_CHAN_HT40PLUS);
2626 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2632 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2635 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2636 "%d (%s)", freq, ret, strerror(-ret));
2642 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2643 struct hostapd_sta_add_params *params)
2645 struct wpa_driver_nl80211_data *drv = priv;
2649 msg = nlmsg_alloc();
2653 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2654 0, NL80211_CMD_NEW_STATION, 0);
2656 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2657 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2658 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2659 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2660 params->supp_rates);
2661 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2662 params->listen_interval);
2664 #ifdef CONFIG_IEEE80211N
2665 if (params->ht_capabilities) {
2666 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2667 params->ht_capabilities->length,
2668 ¶ms->ht_capabilities->data);
2670 #endif /* CONFIG_IEEE80211N */
2672 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2674 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2675 "result: %d (%s)", ret, strerror(-ret));
2683 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2685 struct wpa_driver_nl80211_data *drv = priv;
2689 msg = nlmsg_alloc();
2693 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2694 0, NL80211_CMD_DEL_STATION, 0);
2696 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2697 if_nametoindex(drv->ifname));
2698 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2700 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2708 #endif /* CONFIG_AP || HOSTAPD */
2713 static int wpa_driver_nl80211_set_beacon(void *priv,
2714 const u8 *head, size_t head_len,
2715 const u8 *tail, size_t tail_len,
2718 struct wpa_driver_nl80211_data *drv = priv;
2719 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2725 #endif /* CONFIG_AP */
2727 #if defined(CONFIG_AP) || defined(HOSTAPD)
2729 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2735 /* stop listening for EAPOL on this interface */
2736 del_ifidx(drv, ifidx);
2737 #endif /* HOSTAPD */
2739 msg = nlmsg_alloc();
2741 goto nla_put_failure;
2743 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2744 0, NL80211_CMD_DEL_INTERFACE, 0);
2745 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2747 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2750 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2755 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2757 enum nl80211_iftype iftype,
2760 struct nl_msg *msg, *flags = NULL;
2764 msg = nlmsg_alloc();
2768 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2769 0, NL80211_CMD_NEW_INTERFACE, 0);
2770 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2771 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2772 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2774 if (iftype == NL80211_IFTYPE_MONITOR) {
2777 flags = nlmsg_alloc();
2779 goto nla_put_failure;
2781 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2783 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2788 goto nla_put_failure;
2791 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2794 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2795 ifname, ret, strerror(-ret));
2799 ifidx = if_nametoindex(ifname);
2805 /* start listening for EAPOL on this interface */
2806 add_ifidx(drv, ifidx);
2808 if (addr && iftype == NL80211_IFTYPE_AP &&
2809 set_ifhwaddr(drv, ifname, addr)) {
2810 nl80211_remove_iface(drv, ifidx);
2813 #endif /* HOSTAPD */
2817 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2818 const char *ifname, enum nl80211_iftype iftype,
2823 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2825 /* if error occured and interface exists already */
2826 if (ret == -ENFILE && if_nametoindex(ifname)) {
2827 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2829 /* Try to remove the interface that was already there. */
2830 nl80211_remove_iface(drv, if_nametoindex(ifname));
2832 /* Try to create the interface again */
2833 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2839 #endif /* CONFIG_AP || HOSTAPD */
2843 void ap_tx_status(void *ctx, const u8 *addr,
2844 const u8 *buf, size_t len, int ack);
2845 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2846 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2847 struct hostapd_frame_info *fi);
2848 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2850 #endif /* CONFIG_AP */
2852 #if defined(CONFIG_AP) || defined(HOSTAPD)
2854 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2856 struct ieee80211_hdr *hdr;
2857 u16 fc, type, stype;
2859 hdr = (struct ieee80211_hdr *) buf;
2860 fc = le_to_host16(hdr->frame_control);
2862 type = WLAN_FC_GET_TYPE(fc);
2863 stype = WLAN_FC_GET_STYPE(fc);
2866 case WLAN_FC_TYPE_MGMT:
2867 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2868 ok ? "ACK" : "fail");
2870 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2872 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2873 #endif /* HOSTAPD */
2875 case WLAN_FC_TYPE_CTRL:
2876 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2877 ok ? "ACK" : "fail");
2879 case WLAN_FC_TYPE_DATA:
2881 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2883 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2884 #endif /* HOSTAPD */
2887 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2894 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2895 struct ieee80211_hdr *hdr, size_t len)
2898 hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2900 ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2901 #endif /* HOSTAPD */
2905 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2906 u8 *buf, size_t len,
2907 struct hostapd_frame_info *hfi)
2909 struct ieee80211_hdr *hdr;
2912 hdr = (struct ieee80211_hdr *) buf;
2913 fc = le_to_host16(hdr->frame_control);
2914 stype = WLAN_FC_GET_STYPE(fc);
2916 switch (WLAN_FC_GET_TYPE(fc)) {
2917 case WLAN_FC_TYPE_MGMT:
2918 if (stype != WLAN_FC_STYPE_BEACON &&
2919 stype != WLAN_FC_STYPE_PROBE_REQ)
2920 wpa_printf(MSG_MSGDUMP, "MGMT");
2922 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2924 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2925 #endif /* HOSTAPD */
2927 case WLAN_FC_TYPE_CTRL:
2928 /* can only get here with PS-Poll frames */
2929 wpa_printf(MSG_DEBUG, "CTRL");
2930 from_unknown_sta(drv, hdr, len);
2932 case WLAN_FC_TYPE_DATA:
2933 from_unknown_sta(drv, hdr, len);
2939 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2941 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2943 unsigned char buf[3000];
2944 struct ieee80211_radiotap_iterator iter;
2946 struct hostapd_frame_info hfi;
2947 int injected = 0, failed = 0, rxflags = 0;
2949 len = recv(sock, buf, sizeof(buf), 0);
2955 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2956 printf("received invalid radiotap frame\n");
2960 memset(&hfi, 0, sizeof(hfi));
2963 ret = ieee80211_radiotap_iterator_next(&iter);
2967 printf("received invalid radiotap frame (%d)\n", ret);
2970 switch (iter.this_arg_index) {
2971 case IEEE80211_RADIOTAP_FLAGS:
2972 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2975 case IEEE80211_RADIOTAP_RX_FLAGS:
2978 case IEEE80211_RADIOTAP_TX_FLAGS:
2980 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2981 IEEE80211_RADIOTAP_F_TX_FAIL;
2983 case IEEE80211_RADIOTAP_DATA_RETRIES:
2985 case IEEE80211_RADIOTAP_CHANNEL:
2986 /* TODO convert from freq/flags to channel number
2991 case IEEE80211_RADIOTAP_RATE:
2992 hfi.datarate = *iter.this_arg * 5;
2994 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2995 hfi.ssi_signal = *iter.this_arg;
3000 if (rxflags && injected)
3004 handle_frame(drv, buf + iter.max_length,
3005 len - iter.max_length, &hfi);
3007 handle_tx_callback(drv->ctx, buf + iter.max_length,
3008 len - iter.max_length, !failed);
3013 * we post-process the filter code later and rewrite
3014 * this to the offset to the last instruction
3019 static struct sock_filter msock_filter_insns[] = {
3021 * do a little-endian load of the radiotap length field
3023 /* load lower byte into A */
3024 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
3025 /* put it into X (== index register) */
3026 BPF_STMT(BPF_MISC| BPF_TAX, 0),
3027 /* load upper byte into A */
3028 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
3029 /* left-shift it by 8 */
3030 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3032 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3033 /* put result into X */
3034 BPF_STMT(BPF_MISC| BPF_TAX, 0),
3037 * Allow management frames through, this also gives us those
3038 * management frames that we sent ourselves with status
3040 /* load the lower byte of the IEEE 802.11 frame control field */
3041 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3042 /* mask off frame type and version */
3043 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3044 /* accept frame if it's both 0, fall through otherwise */
3045 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3048 * TODO: add a bit to radiotap RX flags that indicates
3049 * that the sending station is not associated, then
3050 * add a filter here that filters on our DA and that flag
3051 * to allow us to deauth frames to that bad station.
3053 * Not a regression -- we didn't do it before either.
3058 * drop non-data frames, WDS frames
3060 /* load the lower byte of the frame control field */
3061 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3062 /* mask off QoS bit */
3063 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
3064 /* drop non-data frames */
3065 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
3066 /* load the upper byte of the frame control field */
3067 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3068 /* mask off toDS/fromDS */
3069 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
3070 /* drop WDS frames */
3071 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
3075 * add header length to index
3077 /* load the lower byte of the frame control field */
3078 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3079 /* mask off QoS bit */
3080 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
3081 /* right shift it by 6 to give 0 or 2 */
3082 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
3083 /* add data frame header length */
3084 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
3085 /* add index, was start of 802.11 header */
3086 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
3087 /* move to index, now start of LL header */
3088 BPF_STMT(BPF_MISC | BPF_TAX, 0),
3091 * Accept empty data frames, we use those for
3094 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
3095 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3098 * Accept EAPOL frames
3100 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
3101 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3102 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
3103 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3105 /* keep these last two statements or change the code below */
3106 /* return 0 == "DROP" */
3107 BPF_STMT(BPF_RET | BPF_K, 0),
3108 /* return ~0 == "keep all" */
3109 BPF_STMT(BPF_RET | BPF_K, ~0),
3112 static struct sock_fprog msock_filter = {
3113 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3114 .filter = msock_filter_insns,
3118 static int add_monitor_filter(int s)
3122 /* rewrite all PASS/FAIL jump offsets */
3123 for (idx = 0; idx < msock_filter.len; idx++) {
3124 struct sock_filter *insn = &msock_filter_insns[idx];
3126 if (BPF_CLASS(insn->code) == BPF_JMP) {
3127 if (insn->code == (BPF_JMP|BPF_JA)) {
3128 if (insn->k == PASS)
3129 insn->k = msock_filter.len - idx - 2;
3130 else if (insn->k == FAIL)
3131 insn->k = msock_filter.len - idx - 3;
3134 if (insn->jt == PASS)
3135 insn->jt = msock_filter.len - idx - 2;
3136 else if (insn->jt == FAIL)
3137 insn->jt = msock_filter.len - idx - 3;
3139 if (insn->jf == PASS)
3140 insn->jf = msock_filter.len - idx - 2;
3141 else if (insn->jf == FAIL)
3142 insn->jf = msock_filter.len - idx - 3;
3146 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3147 &msock_filter, sizeof(msock_filter))) {
3148 perror("SO_ATTACH_FILTER");
3156 static void nl80211_remove_monitor_interface(
3157 struct wpa_driver_nl80211_data *drv)
3159 if (drv->monitor_ifidx >= 0) {
3160 nl80211_remove_iface(drv, drv->monitor_ifidx);
3161 drv->monitor_ifidx = -1;
3167 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3170 struct sockaddr_ll ll;
3174 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3175 buf[IFNAMSIZ - 1] = '\0';
3177 drv->monitor_ifidx =
3178 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3180 if (drv->monitor_ifidx < 0)
3183 if (hostapd_set_iface_flags(drv, buf, 1))
3186 memset(&ll, 0, sizeof(ll));
3187 ll.sll_family = AF_PACKET;
3188 ll.sll_ifindex = drv->monitor_ifidx;
3189 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3190 if (drv->monitor_sock < 0) {
3191 perror("socket[PF_PACKET,SOCK_RAW]");
3195 if (add_monitor_filter(drv->monitor_sock)) {
3196 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3197 "interface; do filtering in user space");
3198 /* This works, but will cost in performance. */
3201 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3202 perror("monitor socket bind");
3206 optlen = sizeof(optval);
3209 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3210 perror("Failed to set socket priority");
3214 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3216 printf("Could not register monitor read socket\n");
3222 nl80211_remove_monitor_interface(drv);
3227 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3229 static int wpa_driver_nl80211_hapd_send_eapol(
3230 void *priv, const u8 *addr, const u8 *data,
3231 size_t data_len, int encrypt, const u8 *own_addr)
3233 struct wpa_driver_nl80211_data *drv = priv;
3234 struct ieee80211_hdr *hdr;
3239 int qos = sta->flags & WLAN_STA_WME;
3244 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3246 hdr = os_zalloc(len);
3248 printf("malloc() failed for i802_send_data(len=%lu)\n",
3249 (unsigned long) len);
3253 hdr->frame_control =
3254 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3255 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3257 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3258 #if 0 /* To be enabled if qos determination is added above */
3260 hdr->frame_control |=
3261 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3265 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3266 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3267 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3268 pos = (u8 *) (hdr + 1);
3270 #if 0 /* To be enabled if qos determination is added above */
3272 /* add an empty QoS header if needed */
3279 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3280 pos += sizeof(rfc1042_header);
3281 WPA_PUT_BE16(pos, ETH_P_PAE);
3283 memcpy(pos, data, data_len);
3285 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3287 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3289 (unsigned long) len, errno, strerror(errno));
3297 static u32 sta_flags_nl80211(int flags)
3301 if (flags & WLAN_STA_AUTHORIZED)
3302 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3303 if (flags & WLAN_STA_WMM)
3304 f |= BIT(NL80211_STA_FLAG_WME);
3305 if (flags & WLAN_STA_SHORT_PREAMBLE)
3306 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3307 if (flags & WLAN_STA_MFP)
3308 f |= BIT(NL80211_STA_FLAG_MFP);
3314 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3315 int total_flags, int flags_or,
3318 struct wpa_driver_nl80211_data *drv = priv;
3319 struct nl_msg *msg, *flags = NULL;
3320 struct nl80211_sta_flag_update upd;
3322 msg = nlmsg_alloc();
3326 flags = nlmsg_alloc();
3332 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3333 0, NL80211_CMD_SET_STATION, 0);
3335 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3336 if_nametoindex(drv->ifname));
3337 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3340 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3341 * can be removed eventually.
3343 if (total_flags & WLAN_STA_AUTHORIZED)
3344 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3346 if (total_flags & WLAN_STA_WMM)
3347 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3349 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3350 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3352 if (total_flags & WLAN_STA_MFP)
3353 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3355 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3356 goto nla_put_failure;
3358 os_memset(&upd, 0, sizeof(upd));
3359 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3360 upd.set = sta_flags_nl80211(flags_or);
3361 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3365 return send_and_recv_msgs(drv, msg, NULL, NULL);
3371 #endif /* CONFIG_AP || HOSTAPD */
3375 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3376 struct wpa_driver_associate_params *params)
3378 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3379 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3380 nl80211_remove_monitor_interface(drv);
3384 /* TODO: setup monitor interface (and add code somewhere to remove this
3385 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3389 #endif /* CONFIG_AP */
3393 static int wpa_driver_nl80211_connect(
3394 struct wpa_driver_nl80211_data *drv,
3395 struct wpa_driver_associate_params *params)
3398 enum nl80211_auth_type type;
3401 msg = nlmsg_alloc();
3405 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3406 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3407 NL80211_CMD_CONNECT, 0);
3409 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3410 if (params->bssid) {
3411 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3412 MAC2STR(params->bssid));
3413 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3416 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3417 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3420 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3421 params->ssid, params->ssid_len);
3422 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3424 if (params->ssid_len > sizeof(drv->ssid))
3425 goto nla_put_failure;
3426 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3427 drv->ssid_len = params->ssid_len;
3429 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3431 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3434 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3435 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3436 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3437 type = NL80211_AUTHTYPE_SHARED_KEY;
3438 else if (params->auth_alg & AUTH_ALG_LEAP)
3439 type = NL80211_AUTHTYPE_NETWORK_EAP;
3440 else if (params->auth_alg & AUTH_ALG_FT)
3441 type = NL80211_AUTHTYPE_FT;
3443 goto nla_put_failure;
3445 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3446 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3448 if (params->wpa_ie && params->wpa_ie_len) {
3449 enum nl80211_wpa_versions ver;
3451 if (params->wpa_ie[0] == WLAN_EID_RSN)
3452 ver = NL80211_WPA_VERSION_2;
3454 ver = NL80211_WPA_VERSION_1;
3456 wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
3457 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3460 if (params->pairwise_suite != CIPHER_NONE) {
3461 int cipher = IW_AUTH_CIPHER_NONE;
3463 switch (params->pairwise_suite) {
3465 cipher = WLAN_CIPHER_SUITE_WEP40;
3468 cipher = WLAN_CIPHER_SUITE_WEP104;
3471 cipher = WLAN_CIPHER_SUITE_CCMP;
3475 cipher = WLAN_CIPHER_SUITE_TKIP;
3478 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3481 if (params->group_suite != CIPHER_NONE) {
3482 int cipher = IW_AUTH_CIPHER_NONE;
3484 switch (params->group_suite) {
3486 cipher = WLAN_CIPHER_SUITE_WEP40;
3489 cipher = WLAN_CIPHER_SUITE_WEP104;
3492 cipher = WLAN_CIPHER_SUITE_CCMP;
3496 cipher = WLAN_CIPHER_SUITE_TKIP;
3499 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3502 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3503 params->key_mgmt_suite == KEY_MGMT_PSK) {
3504 int mgmt = WLAN_AKM_SUITE_PSK;
3506 switch (params->key_mgmt_suite) {
3507 case KEY_MGMT_802_1X:
3508 mgmt = WLAN_AKM_SUITE_8021X;
3512 mgmt = WLAN_AKM_SUITE_PSK;
3515 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3518 ret = nl80211_set_conn_keys(params, msg);
3520 goto nla_put_failure;
3522 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3525 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3526 "(%s)", ret, strerror(-ret));
3527 goto nla_put_failure;
3530 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3539 static int wpa_driver_nl80211_associate(
3540 void *priv, struct wpa_driver_associate_params *params)
3542 struct wpa_driver_nl80211_data *drv = priv;
3547 if (params->mode == 2)
3548 return wpa_driver_nl80211_ap(drv, params);
3549 #endif /* CONFIG_AP */
3551 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3552 return wpa_driver_nl80211_connect(drv, params);
3555 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
3556 params->drop_unencrypted);
3557 #endif /* NO_WEXT */
3559 drv->associated = 0;
3561 msg = nlmsg_alloc();
3565 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3567 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3568 NL80211_CMD_ASSOCIATE, 0);
3570 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3571 if (params->bssid) {
3572 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3573 MAC2STR(params->bssid));
3574 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3577 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3578 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3581 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3582 params->ssid, params->ssid_len);
3583 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3585 if (params->ssid_len > sizeof(drv->ssid))
3586 goto nla_put_failure;
3587 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3588 drv->ssid_len = params->ssid_len;
3590 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3592 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3595 #ifdef CONFIG_IEEE80211W
3596 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3597 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3598 #endif /* CONFIG_IEEE80211W */
3600 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3602 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3605 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3606 "(%s)", ret, strerror(-ret));
3607 goto nla_put_failure;
3610 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3617 #endif /* HOSTAPD */
3620 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3621 int ifindex, int mode)
3626 msg = nlmsg_alloc();
3630 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3631 0, NL80211_CMD_SET_INTERFACE, 0);
3632 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3633 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3635 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3639 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3640 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3645 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3647 struct wpa_driver_nl80211_data *drv = priv;
3653 nlmode = NL80211_IFTYPE_STATION;
3656 nlmode = NL80211_IFTYPE_ADHOC;
3659 nlmode = NL80211_IFTYPE_AP;
3665 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3666 drv->nlmode = nlmode;
3671 if (nlmode == drv->nlmode) {
3673 goto done; /* Already in the requested mode */
3676 /* mac80211 doesn't allow mode changes while the device is up, so
3677 * take the device down, try to set the mode again, and bring the
3680 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3681 /* Try to set the mode again while the interface is down */
3682 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3683 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3688 drv->nlmode = nlmode;
3691 #if defined(CONFIG_AP) || defined(HOSTAPD)
3692 if (!ret && nlmode == NL80211_IFTYPE_AP) {
3693 /* Setup additional AP mode functionality if needed */
3694 if (drv->monitor_ifidx < 0 &&
3695 nl80211_create_monitor_interface(drv))
3697 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3698 /* Remove additional AP mode functionality */
3699 nl80211_remove_monitor_interface(drv);
3701 #endif /* CONFIG_AP || HOSTAPD */
3709 static int wpa_driver_nl80211_get_capa(void *priv,
3710 struct wpa_driver_capa *capa)
3712 struct wpa_driver_nl80211_data *drv = priv;
3713 if (!drv->has_capability)
3715 os_memcpy(capa, &drv->capa, sizeof(*capa));
3720 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3722 struct wpa_driver_nl80211_data *drv = priv;
3724 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3725 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3726 drv->operstate = state;
3727 return wpa_driver_nl80211_send_oper_ifla(
3728 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3732 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3734 struct wpa_driver_nl80211_data *drv = priv;
3736 struct nl80211_sta_flag_update upd;
3738 msg = nlmsg_alloc();
3742 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3743 0, NL80211_CMD_SET_STATION, 0);
3745 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3746 if_nametoindex(drv->ifname));
3747 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3749 os_memset(&upd, 0, sizeof(upd));
3750 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3752 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3753 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3755 return send_and_recv_msgs(drv, msg, NULL, NULL);
3760 #endif /* HOSTAPD */
3765 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3768 struct i802_bss *bss = &drv->bss;
3770 if (ifindex == bss->ifindex)
3774 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3779 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3784 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3786 for (i = 0; i < drv->num_if_indices; i++) {
3787 if (drv->if_indices[i] == 0) {
3788 drv->if_indices[i] = ifidx;
3793 if (drv->if_indices != drv->default_if_indices)
3794 old = drv->if_indices;
3798 drv->if_indices = realloc(old,
3799 sizeof(int) * (drv->num_if_indices + 1));
3800 if (!drv->if_indices) {
3802 drv->if_indices = drv->default_if_indices;
3804 drv->if_indices = old;
3805 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3807 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3810 drv->if_indices[drv->num_if_indices] = ifidx;
3811 drv->num_if_indices++;
3815 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3819 for (i = 0; i < drv->num_if_indices; i++) {
3820 if (drv->if_indices[i] == ifidx) {
3821 drv->if_indices[i] = 0;
3828 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3832 for (i = 0; i < drv->num_if_indices; i++)
3833 if (drv->if_indices[i] == ifidx)
3840 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3841 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3842 size_t seq_len, const u8 *key, size_t key_len)
3844 struct wpa_driver_nl80211_data *drv = priv;
3845 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3846 set_tx, seq, seq_len, key, key_len);
3850 static inline int min_int(int a, int b)
3858 static int get_key_handler(struct nl_msg *msg, void *arg)
3860 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3861 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3863 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3864 genlmsg_attrlen(gnlh, 0), NULL);
3867 * TODO: validate the key index and mac address!
3868 * Otherwise, there's a race condition as soon as
3869 * the kernel starts sending key notifications.
3872 if (tb[NL80211_ATTR_KEY_SEQ])
3873 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3874 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3879 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3882 struct wpa_driver_nl80211_data *drv = priv;
3885 msg = nlmsg_alloc();
3889 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3890 0, NL80211_CMD_GET_KEY, 0);
3893 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3894 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3895 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3899 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3905 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3908 struct wpa_driver_nl80211_data *drv = priv;
3910 u8 rates[NL80211_MAX_SUPP_RATES];
3914 msg = nlmsg_alloc();
3918 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3919 NL80211_CMD_SET_BSS, 0);
3921 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3922 rates[rates_len++] = basic_rates[i] / 5;
3924 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3926 /* TODO: multi-BSS support */
3927 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3929 return send_and_recv_msgs(drv, msg, NULL, NULL);
3935 /* Set kernel driver on given frequency (MHz) */
3936 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3938 struct wpa_driver_nl80211_data *drv = priv;
3939 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3940 freq->sec_channel_offset);
3944 static int i802_set_rts(void *priv, int rts)
3946 struct wpa_driver_nl80211_data *drv = priv;
3951 msg = nlmsg_alloc();
3960 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3961 0, NL80211_CMD_SET_WIPHY, 0);
3962 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3963 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3965 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3969 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3970 "%d (%s)", rts, ret, strerror(-ret));
3975 static int i802_set_frag(void *priv, int frag)
3977 struct wpa_driver_nl80211_data *drv = priv;
3982 msg = nlmsg_alloc();
3991 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3992 0, NL80211_CMD_SET_WIPHY, 0);
3993 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3994 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3996 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4000 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4001 "%d: %d (%s)", frag, ret, strerror(-ret));
4006 static int i802_flush(void *priv)
4008 struct wpa_driver_nl80211_data *drv = priv;
4011 msg = nlmsg_alloc();
4015 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4016 0, NL80211_CMD_DEL_STATION, 0);
4019 * XXX: FIX! this needs to flush all VLANs too
4021 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4022 if_nametoindex(drv->ifname));
4024 return send_and_recv_msgs(drv, msg, NULL, NULL);
4030 static int get_sta_handler(struct nl_msg *msg, void *arg)
4032 struct nlattr *tb[NL80211_ATTR_MAX + 1];
4033 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4034 struct hostap_sta_driver_data *data = arg;
4035 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4036 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4037 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4038 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4039 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4040 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4041 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4044 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4045 genlmsg_attrlen(gnlh, 0), NULL);
4048 * TODO: validate the interface and mac address!
4049 * Otherwise, there's a race condition as soon as
4050 * the kernel starts sending station notifications.
4053 if (!tb[NL80211_ATTR_STA_INFO]) {
4054 wpa_printf(MSG_DEBUG, "sta stats missing!");
4057 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4058 tb[NL80211_ATTR_STA_INFO],
4060 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4064 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4065 data->inactive_msec =
4066 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4067 if (stats[NL80211_STA_INFO_RX_BYTES])
4068 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4069 if (stats[NL80211_STA_INFO_TX_BYTES])
4070 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4071 if (stats[NL80211_STA_INFO_RX_PACKETS])
4073 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4074 if (stats[NL80211_STA_INFO_TX_PACKETS])
4076 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4081 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4084 struct wpa_driver_nl80211_data *drv = priv;
4087 os_memset(data, 0, sizeof(*data));
4088 msg = nlmsg_alloc();
4092 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4093 0, NL80211_CMD_GET_STATION, 0);
4095 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4096 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4098 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4104 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4105 int cw_min, int cw_max, int burst_time)
4107 struct wpa_driver_nl80211_data *drv = priv;
4109 struct nlattr *txq, *params;
4111 msg = nlmsg_alloc();
4115 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4116 0, NL80211_CMD_SET_WIPHY, 0);
4118 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4120 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4122 goto nla_put_failure;
4124 /* We are only sending parameters for a single TXQ at a time */
4125 params = nla_nest_start(msg, 1);
4127 goto nla_put_failure;
4129 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4130 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4131 * 32 usec, so need to convert the value here. */
4132 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4133 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4134 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4135 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4137 nla_nest_end(msg, params);
4139 nla_nest_end(msg, txq);
4141 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4148 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4150 struct wpa_driver_nl80211_data *drv = priv;
4152 struct i802_bss *bss;
4154 bss = os_zalloc(sizeof(*bss));
4158 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4163 bss->ifindex = ifidx;
4164 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4165 nl80211_remove_iface(priv, ifidx);
4169 bss->next = drv->bss.next;
4170 drv->bss.next = bss;
4175 static int i802_bss_remove(void *priv, const char *ifname)
4177 struct wpa_driver_nl80211_data *drv = priv;
4178 struct i802_bss *bss, *prev;
4179 int ifindex = if_nametoindex(ifname);
4180 nl80211_remove_iface(priv, ifindex);
4182 bss = drv->bss.next;
4184 if (ifindex == bss->ifindex) {
4185 prev->next = bss->next;
4196 static int i802_set_beacon(const char *iface, void *priv,
4197 const u8 *head, size_t head_len,
4198 const u8 *tail, size_t tail_len, int dtim_period)
4200 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
4207 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4209 struct wpa_driver_nl80211_data *drv = priv;
4212 msg = nlmsg_alloc();
4216 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4217 NL80211_CMD_SET_BSS, 0);
4220 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4222 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4224 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4226 /* TODO: multi-BSS support */
4227 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4229 return send_and_recv_msgs(drv, msg, NULL, NULL);
4235 static int i802_set_cts_protect(void *priv, int value)
4237 return i802_set_bss(priv, value, -1, -1);
4241 static int i802_set_preamble(void *priv, int value)
4243 return i802_set_bss(priv, -1, value, -1);
4247 static int i802_set_short_slot_time(void *priv, int value)
4249 return i802_set_bss(priv, -1, -1, value);
4253 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4256 case HOSTAPD_IF_VLAN:
4257 return NL80211_IFTYPE_AP_VLAN;
4263 static int i802_if_add(const char *iface, void *priv,
4264 enum hostapd_driver_if_type type, char *ifname,
4267 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4273 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4274 char *ifname, const u8 *addr)
4276 /* unused at the moment */
4281 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4282 const char *ifname, const u8 *addr)
4284 nl80211_remove_iface(priv, if_nametoindex(ifname));
4289 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4290 const char *ifname, int vlan_id)
4292 struct wpa_driver_nl80211_data *drv = priv;
4295 msg = nlmsg_alloc();
4299 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4300 0, NL80211_CMD_SET_STATION, 0);
4302 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4303 if_nametoindex(drv->ifname));
4304 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4305 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4306 if_nametoindex(ifname));
4308 return send_and_recv_msgs(drv, msg, NULL, NULL);
4314 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4316 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4317 struct sockaddr_ll lladdr;
4318 unsigned char buf[3000];
4320 socklen_t fromlen = sizeof(lladdr);
4322 len = recvfrom(sock, buf, sizeof(buf), 0,
4323 (struct sockaddr *)&lladdr, &fromlen);
4329 if (have_ifidx(drv, lladdr.sll_ifindex)) {
4331 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4334 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4339 static int i802_get_inact_sec(void *priv, const u8 *addr)
4341 struct hostap_sta_driver_data data;
4344 data.inactive_msec = (unsigned long) -1;
4345 ret = i802_read_sta_data(priv, &data, addr);
4346 if (ret || data.inactive_msec == (unsigned long) -1)
4348 return data.inactive_msec / 1000;
4352 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4361 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4364 struct wpa_driver_nl80211_data *drv = priv;
4365 struct ieee80211_mgmt mgmt;
4367 memset(&mgmt, 0, sizeof(mgmt));
4368 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4369 WLAN_FC_STYPE_DEAUTH);
4370 memcpy(mgmt.da, addr, ETH_ALEN);
4371 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4372 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4373 mgmt.u.deauth.reason_code = host_to_le16(reason);
4374 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4376 sizeof(mgmt.u.deauth));
4380 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4383 struct wpa_driver_nl80211_data *drv = priv;
4384 struct ieee80211_mgmt mgmt;
4386 memset(&mgmt, 0, sizeof(mgmt));
4387 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4388 WLAN_FC_STYPE_DISASSOC);
4389 memcpy(mgmt.da, addr, ETH_ALEN);
4390 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4391 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4392 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4393 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4395 sizeof(mgmt.u.disassoc));
4399 static void *i802_init(struct hostapd_data *hapd,
4400 struct wpa_init_params *params)
4402 struct wpa_driver_nl80211_data *drv;
4405 drv = wpa_driver_nl80211_init(hapd, params->ifname);
4409 drv->bss.ifindex = drv->ifindex;
4411 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4412 drv->if_indices = drv->default_if_indices;
4413 for (i = 0; i < params->num_bridge; i++) {
4414 if (params->bridge[i])
4415 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4418 /* start listening for EAPOL on the default AP interface */
4419 add_ifidx(drv, drv->ifindex);
4421 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4424 if (params->bssid) {
4425 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4429 if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
4430 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4431 "into AP mode", drv->ifname);
4435 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4438 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4439 if (drv->eapol_sock < 0) {
4440 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4444 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4446 printf("Could not register read socket for eapol\n");
4450 if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4456 nl80211_remove_monitor_interface(drv);
4457 if (drv->ioctl_sock >= 0)
4458 close(drv->ioctl_sock);
4460 genl_family_put(drv->nl80211);
4461 nl_cache_free(drv->nl_cache);
4462 nl_handle_destroy(drv->nl_handle);
4463 nl_cb_put(drv->nl_cb);
4470 static void i802_deinit(void *priv)
4472 wpa_driver_nl80211_deinit(priv);
4475 #endif /* HOSTAPD */
4478 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4480 .desc = "Linux nl80211/cfg80211",
4482 .get_bssid = wpa_driver_nl80211_get_bssid,
4483 .get_ssid = wpa_driver_nl80211_get_ssid,
4484 .set_key = wpa_driver_nl80211_set_key,
4485 #endif /* HOSTAPD */
4486 .scan2 = wpa_driver_nl80211_scan,
4487 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4489 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4490 .disassociate = wpa_driver_nl80211_disassociate,
4491 .authenticate = wpa_driver_nl80211_authenticate,
4492 .associate = wpa_driver_nl80211_associate,
4493 .init = wpa_driver_nl80211_init,
4494 .deinit = wpa_driver_nl80211_deinit,
4495 .get_capa = wpa_driver_nl80211_get_capa,
4496 .set_operstate = wpa_driver_nl80211_set_operstate,
4497 .set_supp_port = wpa_driver_nl80211_set_supp_port,
4498 #endif /* HOSTAPD */
4499 .set_country = wpa_driver_nl80211_set_country,
4500 .set_mode = wpa_driver_nl80211_set_mode,
4502 .set_beacon = wpa_driver_nl80211_set_beacon,
4503 #endif /* CONFIG_AP */
4504 #if defined(CONFIG_AP) || defined(HOSTAPD)
4505 .send_mlme = wpa_driver_nl80211_send_mlme,
4506 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4507 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4508 .sta_add = wpa_driver_nl80211_sta_add,
4509 .sta_remove = wpa_driver_nl80211_sta_remove,
4510 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4511 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4512 #endif /* CONFIG_AP || HOSTAPD */
4514 .hapd_init = i802_init,
4515 .hapd_deinit = i802_deinit,
4516 .hapd_set_key = i802_set_key,
4517 .get_seqnum = i802_get_seqnum,
4518 .flush = i802_flush,
4519 .read_sta_data = i802_read_sta_data,
4520 .sta_deauth = i802_sta_deauth,
4521 .sta_disassoc = i802_sta_disassoc,
4522 .get_inact_sec = i802_get_inact_sec,
4523 .sta_clear_stats = i802_sta_clear_stats,
4524 .set_freq = i802_set_freq,
4525 .set_rts = i802_set_rts,
4526 .set_frag = i802_set_frag,
4527 .set_rate_sets = i802_set_rate_sets,
4528 .hapd_set_beacon = i802_set_beacon,
4529 .set_cts_protect = i802_set_cts_protect,
4530 .set_preamble = i802_set_preamble,
4531 .set_short_slot_time = i802_set_short_slot_time,
4532 .set_tx_queue_params = i802_set_tx_queue_params,
4533 .bss_add = i802_bss_add,
4534 .bss_remove = i802_bss_remove,
4535 .if_add = i802_if_add,
4536 .if_update = i802_if_update,
4537 .if_remove = i802_if_remove,
4538 .set_sta_vlan = i802_set_sta_vlan,
4539 #endif /* HOSTAPD */