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>
22 #include <netlink/genl/genl.h>
23 #include <netlink/genl/family.h>
24 #include <netlink/genl/ctrl.h>
25 #include "nl80211_copy.h"
26 #include "wireless_copy.h"
31 #include "ieee802_11_defs.h"
33 #if defined(CONFIG_AP) || defined(HOSTAPD)
34 #include <netpacket/packet.h>
35 #include <linux/filter.h>
37 #include "radiotap_iter.h"
38 #endif /* CONFIG_AP || HOSTAPD */
42 #include "../hostapd/hostapd_defs.h"
45 #define ETH_P_ALL 0x0003
48 #endif /* CONFIG_AP */
51 #include <netlink/msg.h>
52 #include <netlink/attr.h>
54 #include <net/if_arp.h>
56 #include "../../hostapd/hostapd.h"
57 #include "../../hostapd/config.h"
58 #include "../../hostapd/hw_features.h"
59 #include "../../hostapd/mlme.h"
60 #include "../../hostapd/sta_flags.h"
61 #include "ieee802_11_common.h"
64 /* libnl 2.0 compatibility code */
65 #define nl_handle_alloc_cb nl_socket_alloc_cb
66 #define nl_handle_destroy nl_socket_free
67 #endif /* CONFIG_LIBNL20 */
73 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
76 #define IFF_DORMANT 0x20000 /* driver signals dormant */
79 #ifndef IF_OPER_DORMANT
80 #define IF_OPER_DORMANT 5
86 enum ieee80211_msg_type {
87 ieee80211_msg_normal = 0,
88 ieee80211_msg_tx_callback_ack = 1,
89 ieee80211_msg_tx_callback_fail = 2,
93 struct i802_bss *next;
94 char ifname[IFNAMSIZ + 1];
95 unsigned int beacon_set:1;
98 struct wpa_driver_nl80211_data {
101 int ioctl_sock; /* socket for ioctl() use */
102 char ifname[IFNAMSIZ + 1];
105 struct wpa_driver_capa capa;
110 int scan_complete_events;
112 struct nl_handle *nl_handle;
113 struct nl_cache *nl_cache;
115 struct genl_family *nl80211;
124 unsigned int beacon_set:1;
127 #endif /* CONFIG_AP */
130 struct hostapd_data *hapd;
132 int eapol_sock; /* socket for EAPOL frames */
133 int monitor_sock; /* socket for monitor */
136 int default_if_indices[16];
142 unsigned int ht_40mhz_scan:1;
146 struct hostapd_neighbor_bss *neighbors;
147 size_t num_neighbors;
152 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
154 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
157 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
160 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
162 #endif /* CONFIG_AP */
165 static void handle_frame(struct wpa_driver_nl80211_data *drv,
167 struct hostapd_frame_info *hfi,
168 enum ieee80211_msg_type msg_type);
169 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
170 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
175 static int ack_handler(struct nl_msg *msg, void *arg)
182 static int finish_handler(struct nl_msg *msg, void *arg)
189 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
198 static int no_seq_check(struct nl_msg *msg, void *arg)
204 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
206 int (*valid_handler)(struct nl_msg *, void *),
212 cb = nl_cb_clone(drv->nl_cb);
216 err = nl_send_auto_complete(drv->nl_handle, msg);
222 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
223 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
224 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
227 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
228 valid_handler, valid_data);
231 nl_recvmsgs(drv->nl_handle, cb);
245 static int family_handler(struct nl_msg *msg, void *arg)
247 struct family_data *res = arg;
248 struct nlattr *tb[CTRL_ATTR_MAX + 1];
249 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
250 struct nlattr *mcgrp;
253 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
254 genlmsg_attrlen(gnlh, 0), NULL);
255 if (!tb[CTRL_ATTR_MCAST_GROUPS])
258 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
259 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
260 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
261 nla_len(mcgrp), NULL);
262 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
263 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
264 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
266 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
268 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
276 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
277 const char *family, const char *group)
281 struct family_data res = { group, -ENOENT };
286 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
287 0, 0, CTRL_CMD_GETFAMILY, 0);
288 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
290 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
301 static int wpa_driver_nl80211_send_oper_ifla(
302 struct wpa_driver_nl80211_data *drv,
303 int linkmode, int operstate)
307 struct ifinfomsg ifinfo;
314 os_memset(&req, 0, sizeof(req));
316 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
317 req.hdr.nlmsg_type = RTM_SETLINK;
318 req.hdr.nlmsg_flags = NLM_F_REQUEST;
319 req.hdr.nlmsg_seq = ++nl_seq;
320 req.hdr.nlmsg_pid = 0;
322 req.ifinfo.ifi_family = AF_UNSPEC;
323 req.ifinfo.ifi_type = 0;
324 req.ifinfo.ifi_index = drv->ifindex;
325 req.ifinfo.ifi_flags = 0;
326 req.ifinfo.ifi_change = 0;
328 if (linkmode != -1) {
329 rta = (struct rtattr *)
330 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
331 rta->rta_type = IFLA_LINKMODE;
332 rta->rta_len = RTA_LENGTH(sizeof(char));
333 *((char *) RTA_DATA(rta)) = linkmode;
334 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
335 RTA_LENGTH(sizeof(char));
337 if (operstate != -1) {
338 rta = (struct rtattr *)
339 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
340 rta->rta_type = IFLA_OPERSTATE;
341 rta->rta_len = RTA_LENGTH(sizeof(char));
342 *((char *) RTA_DATA(rta)) = operstate;
343 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
344 RTA_LENGTH(sizeof(char));
347 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
348 linkmode, operstate);
350 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
352 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
353 "%s (assume operstate is not supported)",
357 return ret < 0 ? -1 : 0;
361 static int wpa_driver_nl80211_set_auth_param(
362 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
367 os_memset(&iwr, 0, sizeof(iwr));
368 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
369 iwr.u.param.flags = idx & IW_AUTH_INDEX;
370 iwr.u.param.value = value;
372 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
373 if (errno != EOPNOTSUPP) {
374 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
375 "value 0x%x) failed: %s)",
376 idx, value, strerror(errno));
378 ret = errno == EOPNOTSUPP ? -2 : -1;
385 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
387 struct wpa_driver_nl80211_data *drv = priv;
388 if (!drv->associated)
390 os_memcpy(bssid, drv->bssid, ETH_ALEN);
395 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
397 struct wpa_driver_nl80211_data *drv = priv;
398 if (!drv->associated)
400 os_memcpy(ssid, drv->ssid, drv->ssid_len);
401 return drv->ssid_len;
406 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
407 void *ctx, char *buf, size_t len,
410 union wpa_event_data event;
412 os_memset(&event, 0, sizeof(event));
413 if (len > sizeof(event.interface_status.ifname))
414 len = sizeof(event.interface_status.ifname) - 1;
415 os_memcpy(event.interface_status.ifname, buf, len);
416 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
417 EVENT_INTERFACE_ADDED;
419 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
421 event.interface_status.ifname,
422 del ? "removed" : "added");
424 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
431 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
435 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
438 struct ifinfomsg *ifi;
439 int attrlen, _nlmsg_len, rta_len;
444 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
446 attrlen = h->nlmsg_len - _nlmsg_len;
450 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
452 rta_len = RTA_ALIGN(sizeof(struct rtattr));
453 while (RTA_OK(attr, attrlen)) {
454 if (attr->rta_type == IFLA_IFNAME) {
455 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
461 attr = RTA_NEXT(attr, attrlen);
468 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
469 int ifindex, struct nlmsghdr *h)
471 if (drv->ifindex == ifindex)
474 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
475 drv->ifindex = if_nametoindex(drv->ifname);
476 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
478 wpa_driver_nl80211_finish_drv_init(drv);
486 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
487 void *ctx, struct nlmsghdr *h,
490 struct ifinfomsg *ifi;
491 int attrlen, _nlmsg_len, rta_len;
492 struct rtattr * attr;
494 if (len < sizeof(*ifi))
499 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
500 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
505 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
507 drv->operstate, ifi->ifi_flags,
508 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
509 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
510 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
511 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
513 * Some drivers send the association event before the operup event--in
514 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
515 * fails. This will hit us when wpa_supplicant does not need to do
516 * IEEE 802.1X authentication
518 if (drv->operstate == 1 &&
519 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
520 !(ifi->ifi_flags & IFF_RUNNING))
521 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
523 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
525 attrlen = h->nlmsg_len - _nlmsg_len;
529 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
531 rta_len = RTA_ALIGN(sizeof(struct rtattr));
532 while (RTA_OK(attr, attrlen)) {
533 if (attr->rta_type == IFLA_IFNAME) {
534 wpa_driver_nl80211_event_link(
536 ((char *) attr) + rta_len,
537 attr->rta_len - rta_len, 0);
539 attr = RTA_NEXT(attr, attrlen);
544 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
545 void *ctx, struct nlmsghdr *h,
548 struct ifinfomsg *ifi;
549 int attrlen, _nlmsg_len, rta_len;
550 struct rtattr * attr;
552 if (len < sizeof(*ifi))
557 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
559 attrlen = h->nlmsg_len - _nlmsg_len;
563 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
565 rta_len = RTA_ALIGN(sizeof(struct rtattr));
566 while (RTA_OK(attr, attrlen)) {
567 if (attr->rta_type == IFLA_IFNAME) {
568 wpa_driver_nl80211_event_link(
570 ((char *) attr) + rta_len,
571 attr->rta_len - rta_len, 1);
573 attr = RTA_NEXT(attr, attrlen);
578 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
583 struct sockaddr_nl from;
589 fromlen = sizeof(from);
590 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
591 (struct sockaddr *) &from, &fromlen);
593 if (errno != EINTR && errno != EAGAIN)
594 perror("recvfrom(netlink)");
598 h = (struct nlmsghdr *) buf;
599 while (left >= (int) sizeof(*h)) {
603 plen = len - sizeof(*h);
604 if (len > left || plen < 0) {
605 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
606 "len=%d left=%d plen=%d",
611 switch (h->nlmsg_type) {
613 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
617 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
622 len = NLMSG_ALIGN(len);
624 h = (struct nlmsghdr *) ((char *) h + len);
628 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
632 if (--max_events > 0) {
634 * Try to receive all events in one eloop call in order to
635 * limit race condition on cases where AssocInfo event, Assoc
636 * event, and EAPOL frames are received more or less at the
637 * same time. We want to process the event messages first
638 * before starting EAPOL processing.
645 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
646 const u8 *frame, size_t len)
648 const struct ieee80211_mgmt *mgmt;
649 union wpa_event_data event;
651 mgmt = (const struct ieee80211_mgmt *) frame;
652 if (len < 24 + sizeof(mgmt->u.auth)) {
653 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
658 os_memset(&event, 0, sizeof(event));
659 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
660 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
661 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
662 if (len > 24 + sizeof(mgmt->u.auth)) {
663 event.auth.ies = mgmt->u.auth.variable;
664 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
667 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
671 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
672 const u8 *frame, size_t len)
674 const struct ieee80211_mgmt *mgmt;
675 union wpa_event_data event;
678 mgmt = (const struct ieee80211_mgmt *) frame;
679 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
680 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
685 status = le_to_host16(mgmt->u.assoc_resp.status_code);
686 if (status != WLAN_STATUS_SUCCESS) {
687 os_memset(&event, 0, sizeof(event));
688 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
689 event.assoc_reject.resp_ies =
690 (u8 *) mgmt->u.assoc_resp.variable;
691 event.assoc_reject.resp_ies_len =
692 len - 24 - sizeof(mgmt->u.assoc_resp);
694 event.assoc_reject.status_code = status;
696 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
701 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
703 os_memset(&event, 0, sizeof(event));
704 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
705 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
706 event.assoc_info.resp_ies_len =
707 len - 24 - sizeof(mgmt->u.assoc_resp);
710 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
714 static void mlme_event(struct wpa_driver_nl80211_data *drv,
715 enum nl80211_commands cmd, struct nlattr *frame)
718 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
723 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
724 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
725 nla_data(frame), nla_len(frame));
728 case NL80211_CMD_AUTHENTICATE:
729 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
731 case NL80211_CMD_ASSOCIATE:
732 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
734 case NL80211_CMD_DEAUTHENTICATE:
736 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
738 case NL80211_CMD_DISASSOCIATE:
740 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
750 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
754 if (tb[NL80211_ATTR_MAC])
755 hostapd_michael_mic_failure(drv->hapd,
756 nla_data(tb[NL80211_ATTR_MAC]));
758 union wpa_event_data data;
760 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
761 os_memset(&data, 0, sizeof(data));
762 if (tb[NL80211_ATTR_MAC]) {
763 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
764 nla_data(tb[NL80211_ATTR_MAC]),
765 nla_len(tb[NL80211_ATTR_MAC]));
767 if (tb[NL80211_ATTR_KEY_SEQ]) {
768 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
769 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
770 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
772 if (tb[NL80211_ATTR_KEY_TYPE]) {
773 enum nl80211_key_type key_type =
774 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
775 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
776 if (key_type == NL80211_KEYTYPE_PAIRWISE)
777 data.michael_mic_failure.unicast = 1;
779 data.michael_mic_failure.unicast = 1;
781 if (tb[NL80211_ATTR_KEY_IDX]) {
782 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
783 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
786 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
791 static int process_event(struct nl_msg *msg, void *arg)
793 struct wpa_driver_nl80211_data *drv = arg;
794 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
795 struct nlattr *tb[NL80211_ATTR_MAX + 1];
797 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
798 genlmsg_attrlen(gnlh, 0), NULL);
800 if (tb[NL80211_ATTR_IFINDEX]) {
801 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
802 if (ifindex != drv->ifindex) {
803 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
804 " for foreign interface (ifindex %d)",
812 case NL80211_CMD_NEW_SCAN_RESULTS:
813 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
814 drv->scan_complete_events = 1;
815 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
817 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
819 case NL80211_CMD_SCAN_ABORTED:
820 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
822 * Need to indicate that scan results are available in order
823 * not to make wpa_supplicant stop its scanning.
825 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
827 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
829 case NL80211_CMD_AUTHENTICATE:
830 case NL80211_CMD_ASSOCIATE:
831 case NL80211_CMD_DEAUTHENTICATE:
832 case NL80211_CMD_DISASSOCIATE:
833 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
836 case NL80211_CMD_MICHAEL_MIC_FAILURE:
837 mlme_event_michael_mic_failure(drv, tb);
840 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
841 "(cmd=%d)", gnlh->cmd);
849 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
853 struct wpa_driver_nl80211_data *drv = eloop_ctx;
855 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
857 cb = nl_cb_clone(drv->nl_cb);
860 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
861 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
862 nl_recvmsgs(drv->nl_handle, cb);
867 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
868 const char *ifname, int dev_up)
872 if (drv->ioctl_sock < 0)
875 os_memset(&ifr, 0, sizeof(ifr));
876 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
878 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
879 perror("ioctl[SIOCGIFFLAGS]");
880 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
886 if (ifr.ifr_flags & IFF_UP)
888 ifr.ifr_flags |= IFF_UP;
890 if (!(ifr.ifr_flags & IFF_UP))
892 ifr.ifr_flags &= ~IFF_UP;
895 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
896 perror("ioctl[SIOCSIFFLAGS]");
905 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
906 * @priv: driver_nl80211 private data
907 * @alpha2_arg: country to which to switch to
908 * Returns: 0 on success, -1 on failure
910 * This asks nl80211 to set the regulatory domain for given
911 * country ISO / IEC alpha2.
913 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
915 struct wpa_driver_nl80211_data *drv = priv;
923 alpha2[0] = alpha2_arg[0];
924 alpha2[1] = alpha2_arg[1];
927 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
928 0, NL80211_CMD_REQ_SET_REG, 0);
930 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
931 if (send_and_recv_msgs(drv, msg, NULL, NULL))
939 struct wiphy_info_data {
945 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
947 struct nlattr *tb[NL80211_ATTR_MAX + 1];
948 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
949 struct wiphy_info_data *info = arg;
951 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
952 genlmsg_attrlen(gnlh, 0), NULL);
954 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
955 info->max_scan_ssids =
956 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
958 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
959 struct nlattr *nl_mode;
961 nla_for_each_nested(nl_mode,
962 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
963 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
964 info->ap_supported = 1;
974 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
975 struct wiphy_info_data *info)
979 os_memset(info, 0, sizeof(*info));
984 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
985 0, NL80211_CMD_GET_WIPHY, 0);
987 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
989 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
998 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1000 struct wiphy_info_data info;
1001 if (wpa_driver_nl80211_get_info(drv, &info))
1003 drv->has_capability = 1;
1004 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1005 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1006 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1007 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1008 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1009 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1010 WPA_DRIVER_CAPA_ENC_WEP104 |
1011 WPA_DRIVER_CAPA_ENC_TKIP |
1012 WPA_DRIVER_CAPA_ENC_CCMP;
1014 drv->capa.max_scan_ssids = info.max_scan_ssids;
1015 if (info.ap_supported)
1016 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1021 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1022 * @ctx: context to be used when calling wpa_supplicant functions,
1023 * e.g., wpa_supplicant_event()
1024 * @ifname: interface name, e.g., wlan0
1025 * Returns: Pointer to private data, %NULL on failure
1027 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1030 struct sockaddr_nl local;
1031 struct wpa_driver_nl80211_data *drv;
1033 drv = os_zalloc(sizeof(*drv));
1037 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1039 drv->monitor_ifidx = -1;
1040 drv->monitor_sock = -1;
1041 #endif /* CONFIG_AP */
1043 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1044 if (drv->nl_cb == NULL) {
1045 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1050 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1051 if (drv->nl_handle == NULL) {
1052 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1057 if (genl_connect(drv->nl_handle)) {
1058 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1063 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1064 if (drv->nl_cache == NULL) {
1065 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1070 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1071 if (drv->nl80211 == NULL) {
1072 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1077 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1079 ret = nl_socket_add_membership(drv->nl_handle, ret);
1081 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1082 "membership for scan events: %d (%s)",
1083 ret, strerror(-ret));
1087 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1089 ret = nl_socket_add_membership(drv->nl_handle, ret);
1091 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1092 "membership for mlme events: %d (%s)",
1093 ret, strerror(-ret));
1096 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1098 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1099 wpa_driver_nl80211_event_receive, drv, ctx);
1101 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1102 if (drv->ioctl_sock < 0) {
1103 perror("socket(PF_INET,SOCK_DGRAM)");
1107 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1109 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1113 os_memset(&local, 0, sizeof(local));
1114 local.nl_family = AF_NETLINK;
1115 local.nl_groups = RTMGRP_LINK;
1116 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1117 perror("bind(netlink)");
1123 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1125 #endif /* HOSTAPD */
1126 drv->link_event_sock = s;
1128 if (wpa_driver_nl80211_finish_drv_init(drv))
1134 eloop_unregister_read_sock(drv->link_event_sock);
1135 close(drv->link_event_sock);
1137 close(drv->ioctl_sock);
1139 genl_family_put(drv->nl80211);
1141 nl_cache_free(drv->nl_cache);
1143 nl_handle_destroy(drv->nl_handle);
1145 nl_cb_put(drv->nl_cb);
1153 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1155 drv->ifindex = if_nametoindex(drv->ifname);
1157 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1158 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1159 "use managed mode");
1162 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1163 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1168 wpa_driver_nl80211_capa(drv);
1170 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1177 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1178 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1180 * Shut down driver interface and processing of driver events. Free
1181 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1183 static void wpa_driver_nl80211_deinit(void *priv)
1185 struct wpa_driver_nl80211_data *drv = priv;
1188 if (drv->monitor_ifidx >= 0)
1189 nl80211_remove_iface(drv, drv->monitor_ifidx);
1190 if (drv->monitor_sock >= 0) {
1191 eloop_unregister_read_sock(drv->monitor_sock);
1192 close(drv->monitor_sock);
1194 #endif /* CONFIG_AP */
1196 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1198 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1200 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1202 eloop_unregister_read_sock(drv->link_event_sock);
1204 hostapd_set_iface_flags(drv, drv->ifname, 0);
1205 wpa_driver_nl80211_set_mode(drv, 0);
1207 close(drv->link_event_sock);
1208 close(drv->ioctl_sock);
1210 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1211 genl_family_put(drv->nl80211);
1212 nl_cache_free(drv->nl_cache);
1213 nl_handle_destroy(drv->nl_handle);
1214 nl_cb_put(drv->nl_cb);
1221 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1222 * @eloop_ctx: Unused
1223 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1225 * This function can be used as registered timeout when starting a scan to
1226 * generate a scan completed event if the driver does not report this.
1228 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1230 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1232 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1233 #endif /* HOSTAPD */
1238 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1239 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1240 * @params: Scan parameters
1241 * Returns: 0 on success, -1 on failure
1243 static int wpa_driver_nl80211_scan(void *priv,
1244 struct wpa_driver_scan_params *params)
1246 struct wpa_driver_nl80211_data *drv = priv;
1247 int ret = 0, timeout;
1248 struct nl_msg *msg, *ssids, *freqs;
1251 msg = nlmsg_alloc();
1252 ssids = nlmsg_alloc();
1253 freqs = nlmsg_alloc();
1254 if (!msg || !ssids || !freqs) {
1261 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1262 NL80211_CMD_TRIGGER_SCAN, 0);
1264 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1266 for (i = 0; i < params->num_ssids; i++) {
1267 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1268 params->ssids[i].ssid);
1270 if (params->num_ssids)
1271 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1273 if (params->extra_ies) {
1274 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1278 if (params->freqs) {
1279 for (i = 0; params->freqs[i]; i++)
1280 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1281 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1284 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1287 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1288 "(%s)", ret, strerror(-ret));
1289 goto nla_put_failure;
1292 /* Not all drivers generate "scan completed" wireless event, so try to
1293 * read results after a timeout. */
1295 if (drv->scan_complete_events) {
1297 * The driver seems to deliver events to notify when scan is
1298 * complete, so use longer timeout to avoid race conditions
1299 * with scanning and following association request.
1303 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1304 "seconds", ret, timeout);
1305 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1306 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1317 static int bss_info_handler(struct nl_msg *msg, void *arg)
1319 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1320 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1321 struct nlattr *bss[NL80211_BSS_MAX + 1];
1322 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1323 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1324 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1325 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1326 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1327 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1328 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1329 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1330 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1332 struct wpa_scan_results *res = arg;
1333 struct wpa_scan_res **tmp;
1334 struct wpa_scan_res *r;
1338 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1339 genlmsg_attrlen(gnlh, 0), NULL);
1340 if (!tb[NL80211_ATTR_BSS])
1342 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1345 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1346 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1347 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1353 r = os_zalloc(sizeof(*r) + ie_len);
1356 if (bss[NL80211_BSS_BSSID])
1357 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1359 if (bss[NL80211_BSS_FREQUENCY])
1360 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1361 if (bss[NL80211_BSS_BEACON_INTERVAL])
1362 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1363 if (bss[NL80211_BSS_CAPABILITY])
1364 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1365 r->flags |= WPA_SCAN_NOISE_INVALID;
1366 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1367 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1368 r->level /= 100; /* mBm to dBm */
1369 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1370 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1371 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1372 r->flags |= WPA_SCAN_LEVEL_INVALID;
1374 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1375 if (bss[NL80211_BSS_TSF])
1376 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1379 os_memcpy(r + 1, ie, ie_len);
1381 tmp = os_realloc(res->res,
1382 (res->num + 1) * sizeof(struct wpa_scan_res *));
1387 tmp[res->num++] = r;
1395 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1396 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1397 * Returns: Scan results on success, -1 on failure
1399 static struct wpa_scan_results *
1400 wpa_driver_nl80211_get_scan_results(void *priv)
1402 struct wpa_driver_nl80211_data *drv = priv;
1404 struct wpa_scan_results *res;
1407 res = os_zalloc(sizeof(*res));
1410 msg = nlmsg_alloc();
1412 goto nla_put_failure;
1414 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1415 NL80211_CMD_GET_SCAN, 0);
1416 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1418 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1421 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1422 (unsigned long) res->num);
1425 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1426 "(%s)", ret, strerror(-ret));
1429 wpa_scan_results_free(res);
1434 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1435 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1436 const u8 *seq, size_t seq_len,
1437 const u8 *key, size_t key_len)
1442 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1443 "set_tx=%d seq_len=%lu key_len=%lu",
1444 __func__, ifindex, alg, addr, key_idx, set_tx,
1445 (unsigned long) seq_len, (unsigned long) key_len);
1447 msg = nlmsg_alloc();
1451 if (alg == WPA_ALG_NONE) {
1452 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1453 0, NL80211_CMD_DEL_KEY, 0);
1455 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1456 0, NL80211_CMD_NEW_KEY, 0);
1457 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1461 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1464 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1468 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1471 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1474 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1477 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1478 "algorithm %d", __func__, alg);
1485 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1487 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1489 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1490 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1492 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1493 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1495 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1496 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1499 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1500 ret, strerror(-ret));
1503 * If we failed or don't need to set the default TX key (below),
1506 if (ret || !set_tx || alg == WPA_ALG_NONE)
1508 #ifdef HOSTAPD /* FIX: is this needed? */
1511 #endif /* HOSTAPD */
1513 msg = nlmsg_alloc();
1517 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1518 0, NL80211_CMD_SET_KEY, 0);
1519 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1520 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1521 if (alg == WPA_ALG_IGTK)
1522 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1524 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1526 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1530 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1531 "err=%d %s)", ret, strerror(-ret));
1539 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1540 const u8 *addr, int key_idx,
1541 int set_tx, const u8 *seq,
1543 const u8 *key, size_t key_len)
1545 struct wpa_driver_nl80211_data *drv = priv;
1546 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1547 seq_len, key, key_len);
1551 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1552 const u8 *addr, int cmd, u16 reason_code)
1557 msg = nlmsg_alloc();
1561 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1563 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1564 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1565 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1567 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1570 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1571 "(%s)", ret, strerror(-ret));
1572 goto nla_put_failure;
1582 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1585 struct wpa_driver_nl80211_data *drv = priv;
1586 wpa_printf(MSG_DEBUG, "%s", __func__);
1587 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1592 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1595 struct wpa_driver_nl80211_data *drv = priv;
1596 wpa_printf(MSG_DEBUG, "%s", __func__);
1597 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1602 static int wpa_driver_nl80211_authenticate(
1603 void *priv, struct wpa_driver_auth_params *params)
1605 struct wpa_driver_nl80211_data *drv = priv;
1608 enum nl80211_auth_type type;
1610 drv->associated = 0;
1612 msg = nlmsg_alloc();
1616 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1619 for (i = 0; i < 4; i++) {
1620 if (!params->wep_key[i])
1622 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1623 i == params->wep_tx_keyidx, NULL, 0,
1625 params->wep_key_len[i]);
1628 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1629 NL80211_CMD_AUTHENTICATE, 0);
1631 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1632 if (params->bssid) {
1633 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1634 MAC2STR(params->bssid));
1635 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1638 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1639 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1642 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1643 params->ssid, params->ssid_len);
1644 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1647 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1649 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1651 * TODO: if multiple auth_alg options enabled, try them one by one if
1652 * the AP rejects authentication due to unknown auth alg
1654 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1655 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1656 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1657 type = NL80211_AUTHTYPE_SHARED_KEY;
1658 else if (params->auth_alg & AUTH_ALG_LEAP)
1659 type = NL80211_AUTHTYPE_NETWORK_EAP;
1660 else if (params->auth_alg & AUTH_ALG_FT)
1661 type = NL80211_AUTHTYPE_FT;
1663 goto nla_put_failure;
1664 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1665 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1667 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1670 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1671 "(%s)", ret, strerror(-ret));
1672 goto nla_put_failure;
1675 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1684 #if defined(CONFIG_AP) || defined(HOSTAPD)
1686 struct phy_info_arg {
1688 struct hostapd_hw_modes *modes;
1691 static int phy_info_handler(struct nl_msg *msg, void *arg)
1693 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1694 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1695 struct phy_info_arg *phy_info = arg;
1697 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1699 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1700 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1701 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1702 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1703 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1704 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1705 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1706 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1709 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1710 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1711 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1712 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1715 struct nlattr *nl_band;
1716 struct nlattr *nl_freq;
1717 struct nlattr *nl_rate;
1718 int rem_band, rem_freq, rem_rate;
1719 struct hostapd_hw_modes *mode;
1720 int idx, mode_is_set;
1722 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1723 genlmsg_attrlen(gnlh, 0), NULL);
1725 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1728 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1729 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1732 phy_info->modes = mode;
1736 mode = &phy_info->modes[*(phy_info->num_modes)];
1737 memset(mode, 0, sizeof(*mode));
1738 *(phy_info->num_modes) += 1;
1740 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1741 nla_len(nl_band), NULL);
1743 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1744 mode->ht_capab = nla_get_u16(
1745 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1748 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1749 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1750 nla_len(nl_freq), freq_policy);
1751 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1753 mode->num_channels++;
1756 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1757 if (!mode->channels)
1762 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1763 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1764 nla_len(nl_freq), freq_policy);
1765 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1768 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1769 mode->channels[idx].flag = 0;
1772 /* crude heuristic */
1773 if (mode->channels[idx].freq < 4000)
1774 mode->mode = HOSTAPD_MODE_IEEE80211B;
1776 mode->mode = HOSTAPD_MODE_IEEE80211A;
1780 /* crude heuristic */
1781 if (mode->channels[idx].freq < 4000)
1782 if (mode->channels[idx].freq == 2484)
1783 mode->channels[idx].chan = 14;
1785 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1787 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1789 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1790 mode->channels[idx].flag |=
1791 HOSTAPD_CHAN_DISABLED;
1792 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1793 mode->channels[idx].flag |=
1794 HOSTAPD_CHAN_PASSIVE_SCAN;
1795 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1796 mode->channels[idx].flag |=
1797 HOSTAPD_CHAN_NO_IBSS;
1798 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1799 mode->channels[idx].flag |=
1802 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1803 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1804 mode->channels[idx].max_tx_power =
1805 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1810 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1811 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1812 nla_len(nl_rate), rate_policy);
1813 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1818 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1824 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1825 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1826 nla_len(nl_rate), rate_policy);
1827 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1829 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1831 /* crude heuristic */
1832 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1833 mode->rates[idx].rate > 200)
1834 mode->mode = HOSTAPD_MODE_IEEE80211G;
1836 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1837 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1846 static struct hostapd_hw_modes *
1847 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1850 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1851 int i, mode11g_idx = -1;
1853 /* If only 802.11g mode is included, use it to construct matching
1854 * 802.11b mode data. */
1856 for (m = 0; m < *num_modes; m++) {
1857 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1858 return modes; /* 802.11b already included */
1859 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1863 if (mode11g_idx < 0)
1864 return modes; /* 2.4 GHz band not supported at all */
1866 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1868 return modes; /* Could not add 802.11b mode */
1870 mode = &nmodes[*num_modes];
1871 os_memset(mode, 0, sizeof(*mode));
1875 mode->mode = HOSTAPD_MODE_IEEE80211B;
1877 mode11g = &modes[mode11g_idx];
1878 mode->num_channels = mode11g->num_channels;
1879 mode->channels = os_malloc(mode11g->num_channels *
1880 sizeof(struct hostapd_channel_data));
1881 if (mode->channels == NULL) {
1883 return modes; /* Could not add 802.11b mode */
1885 os_memcpy(mode->channels, mode11g->channels,
1886 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1888 mode->num_rates = 0;
1889 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1890 if (mode->rates == NULL) {
1891 os_free(mode->channels);
1893 return modes; /* Could not add 802.11b mode */
1896 for (i = 0; i < mode11g->num_rates; i++) {
1897 if (mode11g->rates[i].rate > 110 ||
1898 mode11g->rates[i].flags &
1899 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1901 mode->rates[mode->num_rates] = mode11g->rates[i];
1903 if (mode->num_rates == 4)
1907 if (mode->num_rates == 0) {
1908 os_free(mode->channels);
1909 os_free(mode->rates);
1911 return modes; /* No 802.11b rates */
1914 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1921 static struct hostapd_hw_modes *
1922 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1924 struct wpa_driver_nl80211_data *drv = priv;
1926 struct phy_info_arg result = {
1927 .num_modes = num_modes,
1934 msg = nlmsg_alloc();
1938 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1939 0, NL80211_CMD_GET_WIPHY, 0);
1941 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1943 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1944 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1950 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1951 const void *data, size_t len,
1955 0x00, 0x00, /* radiotap version */
1956 0x0e, 0x00, /* radiotap length */
1957 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1958 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1960 0x00, 0x00, /* RX and TX flags to indicate that */
1961 0x00, 0x00, /* this is the injected frame directly */
1963 struct iovec iov[2] = {
1965 .iov_base = &rtap_hdr,
1966 .iov_len = sizeof(rtap_hdr),
1969 .iov_base = (void *) data,
1973 struct msghdr msg = {
1978 .msg_control = NULL,
1979 .msg_controllen = 0,
1984 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1986 return sendmsg(drv->monitor_sock, &msg, 0);
1990 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1993 struct wpa_driver_nl80211_data *drv = priv;
1994 struct ieee80211_mgmt *mgmt;
1995 int do_not_encrypt = 0;
1998 mgmt = (struct ieee80211_mgmt *) data;
1999 fc = le_to_host16(mgmt->frame_control);
2001 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2002 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2004 * Only one of the authentication frame types is encrypted.
2005 * In order for static WEP encryption to work properly (i.e.,
2006 * to not encrypt the frame), we need to tell mac80211 about
2007 * the frames that must not be encrypted.
2009 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2010 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2011 if (auth_alg == WLAN_AUTH_OPEN ||
2012 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2016 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2020 #endif /* CONFIG_AP || HOSTAPD */
2025 static int wpa_driver_nl80211_set_beacon(void *priv,
2026 const u8 *head, size_t head_len,
2027 const u8 *tail, size_t tail_len,
2030 struct wpa_driver_nl80211_data *drv = priv;
2032 u8 cmd = NL80211_CMD_NEW_BEACON;
2035 msg = nlmsg_alloc();
2039 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2041 if (drv->beacon_set)
2042 cmd = NL80211_CMD_SET_BEACON;
2044 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2046 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2047 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2048 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2049 if (!drv->beacon_int)
2050 drv->beacon_int = 100;
2051 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2052 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2054 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2056 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2057 ret, strerror(-ret));
2059 drv->beacon_set = 1;
2066 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2068 struct wpa_driver_nl80211_data *drv = priv;
2071 drv->beacon_int = value;
2073 if (!drv->beacon_set)
2076 msg = nlmsg_alloc();
2080 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2081 "(beacon_set=%d)", value, drv->beacon_set);
2082 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2083 0, NL80211_CMD_SET_BEACON, 0);
2084 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2086 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2088 return send_and_recv_msgs(drv, msg, NULL, NULL);
2094 static int wpa_driver_nl80211_set_freq2(
2095 struct wpa_driver_nl80211_data *drv,
2096 struct wpa_driver_associate_params *params)
2101 msg = nlmsg_alloc();
2105 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2106 NL80211_CMD_SET_WIPHY, 0);
2108 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2110 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2112 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2115 wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2116 "%d (%s)", params->freq, ret, strerror(-ret));
2121 #endif /* CONFIG_AP */
2123 #if defined(CONFIG_AP) || defined(HOSTAPD)
2125 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2131 /* stop listening for EAPOL on this interface */
2132 del_ifidx(drv, ifidx);
2133 #endif /* HOSTAPD */
2135 msg = nlmsg_alloc();
2137 goto nla_put_failure;
2139 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2140 0, NL80211_CMD_DEL_INTERFACE, 0);
2141 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2143 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2146 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2151 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2152 const char *ifname, enum nl80211_iftype iftype,
2155 struct nl_msg *msg, *flags = NULL;
2161 #endif /* HOSTAPD */
2163 msg = nlmsg_alloc();
2167 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2168 0, NL80211_CMD_NEW_INTERFACE, 0);
2169 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2170 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2171 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2173 if (iftype == NL80211_IFTYPE_MONITOR) {
2176 flags = nlmsg_alloc();
2178 goto nla_put_failure;
2180 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2182 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2187 goto nla_put_failure;
2190 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2193 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2198 ifidx = if_nametoindex(ifname);
2204 /* start listening for EAPOL on this interface */
2205 add_ifidx(drv, ifidx);
2209 case NL80211_IFTYPE_AP:
2210 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2211 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2212 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2214 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2215 nl80211_remove_iface(drv, ifidx);
2219 case NL80211_IFTYPE_WDS:
2220 memset(&iwr, 0, sizeof(iwr));
2221 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2222 iwr.u.addr.sa_family = ARPHRD_ETHER;
2223 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2224 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2232 #endif /* HOSTAPD */
2237 #endif /* CONFIG_AP || HOSTAPD */
2241 void ap_tx_status(void *ctx, const u8 *addr,
2242 const u8 *buf, size_t len, int ack);
2243 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2244 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2245 struct hostapd_frame_info *fi);
2246 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2248 #endif /* CONFIG_AP */
2250 #if defined(CONFIG_AP) || defined(HOSTAPD)
2252 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2254 struct ieee80211_hdr *hdr;
2255 u16 fc, type, stype;
2257 hdr = (struct ieee80211_hdr *) buf;
2258 fc = le_to_host16(hdr->frame_control);
2260 type = WLAN_FC_GET_TYPE(fc);
2261 stype = WLAN_FC_GET_STYPE(fc);
2264 case WLAN_FC_TYPE_MGMT:
2265 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2266 ok ? "ACK" : "fail");
2268 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2270 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2271 #endif /* HOSTAPD */
2273 case WLAN_FC_TYPE_CTRL:
2274 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2275 ok ? "ACK" : "fail");
2277 case WLAN_FC_TYPE_DATA:
2279 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2281 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2282 #endif /* HOSTAPD */
2285 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2291 #endif /* CONFIG_AP || HOSTAPD */
2295 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2296 u8 *buf, size_t len,
2297 struct hostapd_frame_info *hfi,
2298 enum ieee80211_msg_type msg_type)
2300 struct ieee80211_hdr *hdr;
2301 u16 fc, type, stype;
2302 size_t data_len = len;
2305 * PS-Poll frames are 16 bytes. All other frames are
2306 * 24 bytes or longer.
2311 hdr = (struct ieee80211_hdr *) buf;
2312 fc = le_to_host16(hdr->frame_control);
2314 type = WLAN_FC_GET_TYPE(fc);
2315 stype = WLAN_FC_GET_STYPE(fc);
2318 case WLAN_FC_TYPE_DATA:
2321 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2324 case WLAN_FC_FROMDS:
2331 case WLAN_FC_TYPE_CTRL:
2332 /* discard non-ps-poll frames */
2333 if (stype != WLAN_FC_STYPE_PSPOLL)
2336 case WLAN_FC_TYPE_MGMT:
2344 case ieee80211_msg_normal:
2345 /* continue processing */
2347 case ieee80211_msg_tx_callback_ack:
2348 handle_tx_callback(drv->ctx, buf, data_len, 1);
2350 case ieee80211_msg_tx_callback_fail:
2351 handle_tx_callback(drv->ctx, buf, data_len, 0);
2356 case WLAN_FC_TYPE_MGMT:
2357 if (stype != WLAN_FC_STYPE_BEACON &&
2358 stype != WLAN_FC_STYPE_PROBE_REQ)
2359 wpa_printf(MSG_MSGDUMP, "MGMT");
2360 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2362 case WLAN_FC_TYPE_CTRL:
2363 /* can only get here with PS-Poll frames */
2364 wpa_printf(MSG_DEBUG, "CTRL");
2365 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2367 case WLAN_FC_TYPE_DATA:
2368 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2373 #endif /* CONFIG_AP */
2375 #if defined(CONFIG_AP) || defined(HOSTAPD)
2377 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2379 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2381 unsigned char buf[3000];
2382 struct ieee80211_radiotap_iterator iter;
2384 struct hostapd_frame_info hfi;
2385 int injected = 0, failed = 0, msg_type, rxflags = 0;
2387 len = recv(sock, buf, sizeof(buf), 0);
2393 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2394 printf("received invalid radiotap frame\n");
2398 memset(&hfi, 0, sizeof(hfi));
2401 ret = ieee80211_radiotap_iterator_next(&iter);
2405 printf("received invalid radiotap frame (%d)\n", ret);
2408 switch (iter.this_arg_index) {
2409 case IEEE80211_RADIOTAP_FLAGS:
2410 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2413 case IEEE80211_RADIOTAP_RX_FLAGS:
2416 case IEEE80211_RADIOTAP_TX_FLAGS:
2418 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2419 IEEE80211_RADIOTAP_F_TX_FAIL;
2421 case IEEE80211_RADIOTAP_DATA_RETRIES:
2423 case IEEE80211_RADIOTAP_CHANNEL:
2424 /* TODO convert from freq/flags to channel number
2429 case IEEE80211_RADIOTAP_RATE:
2430 hfi.datarate = *iter.this_arg * 5;
2432 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2433 hfi.ssi_signal = *iter.this_arg;
2438 if (rxflags && injected)
2442 msg_type = ieee80211_msg_normal;
2444 msg_type = ieee80211_msg_tx_callback_fail;
2446 msg_type = ieee80211_msg_tx_callback_ack;
2448 handle_frame(drv, buf + iter.max_length,
2449 len - iter.max_length, &hfi, msg_type);
2454 * we post-process the filter code later and rewrite
2455 * this to the offset to the last instruction
2460 static struct sock_filter msock_filter_insns[] = {
2462 * do a little-endian load of the radiotap length field
2464 /* load lower byte into A */
2465 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2466 /* put it into X (== index register) */
2467 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2468 /* load upper byte into A */
2469 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2470 /* left-shift it by 8 */
2471 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2473 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2474 /* put result into X */
2475 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2478 * Allow management frames through, this also gives us those
2479 * management frames that we sent ourselves with status
2481 /* load the lower byte of the IEEE 802.11 frame control field */
2482 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2483 /* mask off frame type and version */
2484 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2485 /* accept frame if it's both 0, fall through otherwise */
2486 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2489 * TODO: add a bit to radiotap RX flags that indicates
2490 * that the sending station is not associated, then
2491 * add a filter here that filters on our DA and that flag
2492 * to allow us to deauth frames to that bad station.
2494 * Not a regression -- we didn't do it before either.
2499 * drop non-data frames, WDS frames
2501 /* load the lower byte of the frame control field */
2502 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2503 /* mask off QoS bit */
2504 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2505 /* drop non-data frames */
2506 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2507 /* load the upper byte of the frame control field */
2508 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2509 /* mask off toDS/fromDS */
2510 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2511 /* drop WDS frames */
2512 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2516 * add header length to index
2518 /* load the lower byte of the frame control field */
2519 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2520 /* mask off QoS bit */
2521 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2522 /* right shift it by 6 to give 0 or 2 */
2523 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2524 /* add data frame header length */
2525 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2526 /* add index, was start of 802.11 header */
2527 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2528 /* move to index, now start of LL header */
2529 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2532 * Accept empty data frames, we use those for
2535 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2536 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2539 * Accept EAPOL frames
2541 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2542 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2543 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2544 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2546 /* keep these last two statements or change the code below */
2547 /* return 0 == "DROP" */
2548 BPF_STMT(BPF_RET | BPF_K, 0),
2549 /* return ~0 == "keep all" */
2550 BPF_STMT(BPF_RET | BPF_K, ~0),
2553 static struct sock_fprog msock_filter = {
2554 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2555 .filter = msock_filter_insns,
2559 static int add_monitor_filter(int s)
2563 /* rewrite all PASS/FAIL jump offsets */
2564 for (idx = 0; idx < msock_filter.len; idx++) {
2565 struct sock_filter *insn = &msock_filter_insns[idx];
2567 if (BPF_CLASS(insn->code) == BPF_JMP) {
2568 if (insn->code == (BPF_JMP|BPF_JA)) {
2569 if (insn->k == PASS)
2570 insn->k = msock_filter.len - idx - 2;
2571 else if (insn->k == FAIL)
2572 insn->k = msock_filter.len - idx - 3;
2575 if (insn->jt == PASS)
2576 insn->jt = msock_filter.len - idx - 2;
2577 else if (insn->jt == FAIL)
2578 insn->jt = msock_filter.len - idx - 3;
2580 if (insn->jf == PASS)
2581 insn->jf = msock_filter.len - idx - 2;
2582 else if (insn->jf == FAIL)
2583 insn->jf = msock_filter.len - idx - 3;
2587 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2588 &msock_filter, sizeof(msock_filter))) {
2589 perror("SO_ATTACH_FILTER");
2598 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2601 struct sockaddr_ll ll;
2605 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2606 buf[IFNAMSIZ - 1] = '\0';
2608 drv->monitor_ifidx =
2609 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2611 if (drv->monitor_ifidx < 0)
2614 if (hostapd_set_iface_flags(drv, buf, 1))
2617 memset(&ll, 0, sizeof(ll));
2618 ll.sll_family = AF_PACKET;
2619 ll.sll_ifindex = drv->monitor_ifidx;
2620 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2621 if (drv->monitor_sock < 0) {
2622 perror("socket[PF_PACKET,SOCK_RAW]");
2626 if (add_monitor_filter(drv->monitor_sock)) {
2627 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2628 "interface; do filtering in user space");
2629 /* This works, but will cost in performance. */
2632 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2633 perror("monitor socket bind");
2637 optlen = sizeof(optval);
2640 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2641 perror("Failed to set socket priority");
2645 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2647 printf("Could not register monitor read socket\n");
2653 nl80211_remove_iface(drv, drv->monitor_ifidx);
2657 #endif /* CONFIG_AP || HOSTAPD */
2661 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2662 struct wpa_driver_associate_params *params)
2664 if (drv->monitor_ifidx < 0 &&
2665 nl80211_create_monitor_interface(drv))
2668 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2669 wpa_driver_nl80211_set_freq2(drv, params)) {
2670 nl80211_remove_iface(drv, drv->monitor_ifidx);
2671 drv->monitor_ifidx = -1;
2675 /* TODO: setup monitor interface (and add code somewhere to remove this
2676 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2680 #endif /* CONFIG_AP */
2683 static int wpa_driver_nl80211_associate(
2684 void *priv, struct wpa_driver_associate_params *params)
2686 struct wpa_driver_nl80211_data *drv = priv;
2691 if (params->mode == 2)
2692 return wpa_driver_nl80211_ap(drv, params);
2693 #endif /* CONFIG_AP */
2695 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2696 params->drop_unencrypted);
2698 drv->associated = 0;
2700 msg = nlmsg_alloc();
2704 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2706 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2707 NL80211_CMD_ASSOCIATE, 0);
2709 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2710 if (params->bssid) {
2711 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2712 MAC2STR(params->bssid));
2713 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2716 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2717 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2720 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2721 params->ssid, params->ssid_len);
2722 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2724 if (params->ssid_len > sizeof(drv->ssid))
2725 goto nla_put_failure;
2726 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2727 drv->ssid_len = params->ssid_len;
2729 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2731 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2734 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2737 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2738 "(%s)", ret, strerror(-ret));
2739 goto nla_put_failure;
2742 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2752 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2753 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2754 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2755 * Returns: 0 on success, -1 on failure
2757 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2766 nlmode = NL80211_IFTYPE_STATION;
2769 nlmode = NL80211_IFTYPE_ADHOC;
2772 nlmode = NL80211_IFTYPE_AP;
2778 msg = nlmsg_alloc();
2782 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2783 0, NL80211_CMD_SET_INTERFACE, 0);
2784 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2785 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2787 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2794 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2795 ret, strerror(-ret));
2799 /* mac80211 doesn't allow mode changes while the device is up, so
2800 * take the device down, try to set the mode again, and bring the
2803 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2804 /* Try to set the mode again while the interface is down */
2805 msg = nlmsg_alloc();
2809 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2810 0, NL80211_CMD_SET_INTERFACE, 0);
2811 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2812 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2813 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2815 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2816 "mode(try_again): %d (%s)",
2817 drv->ifname, ret, strerror(-ret));
2820 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2828 static int wpa_driver_nl80211_get_capa(void *priv,
2829 struct wpa_driver_capa *capa)
2831 struct wpa_driver_nl80211_data *drv = priv;
2832 if (!drv->has_capability)
2834 os_memcpy(capa, &drv->capa, sizeof(*capa));
2839 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2841 struct wpa_driver_nl80211_data *drv = priv;
2843 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2844 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2845 drv->operstate = state;
2846 return wpa_driver_nl80211_send_oper_ifla(
2847 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2853 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2855 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2856 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2859 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2862 struct i802_bss *bss = &drv->bss;
2864 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2868 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2873 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2878 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2880 for (i = 0; i < drv->num_if_indices; i++) {
2881 if (drv->if_indices[i] == 0) {
2882 drv->if_indices[i] = ifidx;
2887 if (drv->if_indices != drv->default_if_indices)
2888 old = drv->if_indices;
2892 drv->if_indices = realloc(old,
2893 sizeof(int) * (drv->num_if_indices + 1));
2894 if (!drv->if_indices) {
2896 drv->if_indices = drv->default_if_indices;
2898 drv->if_indices = old;
2899 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2901 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2904 drv->if_indices[drv->num_if_indices] = ifidx;
2905 drv->num_if_indices++;
2909 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2913 for (i = 0; i < drv->num_if_indices; i++) {
2914 if (drv->if_indices[i] == ifidx) {
2915 drv->if_indices[i] = 0;
2922 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2926 for (i = 0; i < drv->num_if_indices; i++)
2927 if (drv->if_indices[i] == ifidx)
2934 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2935 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2936 size_t seq_len, const u8 *key, size_t key_len)
2938 struct wpa_driver_nl80211_data *drv = priv;
2939 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2940 set_tx, seq, seq_len, key, key_len);
2944 static inline int min_int(int a, int b)
2952 static int get_key_handler(struct nl_msg *msg, void *arg)
2954 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2955 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2957 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2958 genlmsg_attrlen(gnlh, 0), NULL);
2961 * TODO: validate the key index and mac address!
2962 * Otherwise, there's a race condition as soon as
2963 * the kernel starts sending key notifications.
2966 if (tb[NL80211_ATTR_KEY_SEQ])
2967 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2968 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
2973 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
2976 struct wpa_driver_nl80211_data *drv = priv;
2979 msg = nlmsg_alloc();
2983 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2984 0, NL80211_CMD_GET_KEY, 0);
2987 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2988 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2989 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
2993 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
2999 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3002 struct wpa_driver_nl80211_data *drv = priv;
3004 u8 rates[NL80211_MAX_SUPP_RATES];
3008 msg = nlmsg_alloc();
3012 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3013 NL80211_CMD_SET_BSS, 0);
3015 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3016 rates[rates_len++] = basic_rates[i] / 5;
3018 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3020 /* TODO: multi-BSS support */
3021 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3023 return send_and_recv_msgs(drv, msg, NULL, NULL);
3029 /* Set kernel driver on given frequency (MHz) */
3030 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3032 struct wpa_driver_nl80211_data *drv = priv;
3035 msg = nlmsg_alloc();
3039 drv->last_freq = freq->freq;
3040 drv->last_freq_ht = freq->ht_enabled;
3042 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3043 NL80211_CMD_SET_WIPHY, 0);
3045 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3046 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3047 if (freq->ht_enabled) {
3048 switch (freq->sec_channel_offset) {
3050 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3051 NL80211_CHAN_HT40MINUS);
3054 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3055 NL80211_CHAN_HT40PLUS);
3058 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3064 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3071 static int i802_set_rts(void *priv, int rts)
3073 struct wpa_driver_nl80211_data *drv = priv;
3076 memset(&iwr, 0, sizeof(iwr));
3077 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3078 iwr.u.rts.value = rts;
3079 iwr.u.rts.fixed = 1;
3081 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3082 perror("ioctl[SIOCSIWRTS]");
3090 static int i802_set_frag(void *priv, int frag)
3092 struct wpa_driver_nl80211_data *drv = priv;
3095 memset(&iwr, 0, sizeof(iwr));
3096 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3097 iwr.u.frag.value = frag;
3098 iwr.u.frag.fixed = 1;
3100 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3101 perror("ioctl[SIOCSIWFRAG]");
3109 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3111 struct wpa_driver_nl80211_data *drv = priv;
3114 memset(&iwr, 0, sizeof(iwr));
3115 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3117 iwr.u.retry.value = short_retry;
3118 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3119 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3120 perror("ioctl[SIOCSIWRETRY(short)]");
3124 iwr.u.retry.value = long_retry;
3125 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3126 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3127 perror("ioctl[SIOCSIWRETRY(long)]");
3135 static int i802_flush(void *priv)
3137 struct wpa_driver_nl80211_data *drv = priv;
3140 msg = nlmsg_alloc();
3144 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3145 0, NL80211_CMD_DEL_STATION, 0);
3148 * XXX: FIX! this needs to flush all VLANs too
3150 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3151 if_nametoindex(drv->ifname));
3153 return send_and_recv_msgs(drv, msg, NULL, NULL);
3159 static int get_sta_handler(struct nl_msg *msg, void *arg)
3161 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3162 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3163 struct hostap_sta_driver_data *data = arg;
3164 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3165 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3166 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3167 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3168 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3169 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3170 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3173 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3174 genlmsg_attrlen(gnlh, 0), NULL);
3177 * TODO: validate the interface and mac address!
3178 * Otherwise, there's a race condition as soon as
3179 * the kernel starts sending station notifications.
3182 if (!tb[NL80211_ATTR_STA_INFO]) {
3183 wpa_printf(MSG_DEBUG, "sta stats missing!");
3186 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3187 tb[NL80211_ATTR_STA_INFO],
3189 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3193 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3194 data->inactive_msec =
3195 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3196 if (stats[NL80211_STA_INFO_RX_BYTES])
3197 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3198 if (stats[NL80211_STA_INFO_TX_BYTES])
3199 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3200 if (stats[NL80211_STA_INFO_RX_PACKETS])
3202 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3203 if (stats[NL80211_STA_INFO_TX_PACKETS])
3205 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3210 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3213 struct wpa_driver_nl80211_data *drv = priv;
3216 os_memset(data, 0, sizeof(*data));
3217 msg = nlmsg_alloc();
3221 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3222 0, NL80211_CMD_GET_STATION, 0);
3224 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3225 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3227 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3233 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3234 size_t data_len, int encrypt, const u8 *own_addr)
3236 struct wpa_driver_nl80211_data *drv = priv;
3237 struct ieee80211_hdr *hdr;
3242 int qos = sta->flags & WLAN_STA_WME;
3247 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3249 hdr = os_zalloc(len);
3251 printf("malloc() failed for i802_send_data(len=%lu)\n",
3252 (unsigned long) len);
3256 hdr->frame_control =
3257 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3258 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3260 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3261 #if 0 /* To be enabled if qos determination is added above */
3263 hdr->frame_control |=
3264 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3268 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3269 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3270 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3271 pos = (u8 *) (hdr + 1);
3273 #if 0 /* To be enabled if qos determination is added above */
3275 /* add an empty QoS header if needed */
3282 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3283 pos += sizeof(rfc1042_header);
3284 WPA_PUT_BE16(pos, ETH_P_PAE);
3286 memcpy(pos, data, data_len);
3288 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3290 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3292 (unsigned long) len, errno, strerror(errno));
3300 static int i802_sta_add(const char *ifname, void *priv,
3301 struct hostapd_sta_add_params *params)
3303 struct wpa_driver_nl80211_data *drv = priv;
3307 msg = nlmsg_alloc();
3311 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3312 0, NL80211_CMD_NEW_STATION, 0);
3314 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3315 if_nametoindex(drv->ifname));
3316 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3317 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3318 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3319 params->supp_rates);
3320 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3321 params->listen_interval);
3323 #ifdef CONFIG_IEEE80211N
3324 if (params->ht_capabilities) {
3325 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3326 params->ht_capabilities->length,
3327 ¶ms->ht_capabilities->data);
3329 #endif /* CONFIG_IEEE80211N */
3331 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3333 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3334 "result: %d (%s)", ret, strerror(-ret));
3342 static int i802_sta_remove(void *priv, const u8 *addr)
3344 struct wpa_driver_nl80211_data *drv = priv;
3348 msg = nlmsg_alloc();
3352 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3353 0, NL80211_CMD_DEL_STATION, 0);
3355 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3356 if_nametoindex(drv->ifname));
3357 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3359 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3368 static int i802_sta_set_flags(void *priv, const u8 *addr,
3369 int total_flags, int flags_or, int flags_and)
3371 struct wpa_driver_nl80211_data *drv = priv;
3372 struct nl_msg *msg, *flags = NULL;
3374 msg = nlmsg_alloc();
3378 flags = nlmsg_alloc();
3384 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3385 0, NL80211_CMD_SET_STATION, 0);
3387 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3388 if_nametoindex(drv->ifname));
3389 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3391 if (total_flags & WLAN_STA_AUTHORIZED)
3392 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3394 if (total_flags & WLAN_STA_WMM)
3395 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3397 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3398 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3400 if (total_flags & WLAN_STA_MFP)
3401 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3403 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3404 goto nla_put_failure;
3408 return send_and_recv_msgs(drv, msg, NULL, NULL);
3415 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3416 int cw_min, int cw_max, int burst_time)
3418 struct wpa_driver_nl80211_data *drv = priv;
3420 struct nlattr *txq, *params;
3422 msg = nlmsg_alloc();
3426 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3427 0, NL80211_CMD_SET_WIPHY, 0);
3429 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3431 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3433 goto nla_put_failure;
3435 /* We are only sending parameters for a single TXQ at a time */
3436 params = nla_nest_start(msg, 1);
3438 goto nla_put_failure;
3440 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3441 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3442 * 32 usec, so need to convert the value here. */
3443 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3444 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3445 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3446 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3448 nla_nest_end(msg, params);
3450 nla_nest_end(msg, txq);
3452 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3459 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3461 struct wpa_driver_nl80211_data *drv = priv;
3463 struct i802_bss *bss;
3465 bss = os_zalloc(sizeof(*bss));
3468 os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3470 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3475 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3476 nl80211_remove_iface(priv, ifidx);
3480 bss->next = drv->bss.next;
3481 drv->bss.next = bss;
3486 static int i802_bss_remove(void *priv, const char *ifname)
3488 struct wpa_driver_nl80211_data *drv = priv;
3489 struct i802_bss *bss, *prev;
3490 nl80211_remove_iface(priv, if_nametoindex(ifname));
3492 bss = drv->bss.next;
3494 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3495 prev->next = bss->next;
3506 static int i802_set_beacon(const char *iface, void *priv,
3507 const u8 *head, size_t head_len,
3508 const u8 *tail, size_t tail_len, int dtim_period)
3510 struct wpa_driver_nl80211_data *drv = priv;
3512 u8 cmd = NL80211_CMD_NEW_BEACON;
3514 struct i802_bss *bss;
3516 bss = get_bss(drv, iface);
3520 msg = nlmsg_alloc();
3524 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3525 iface, bss->beacon_set);
3526 if (bss->beacon_set)
3527 cmd = NL80211_CMD_SET_BEACON;
3529 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3531 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3532 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3533 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3534 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3535 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3537 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3539 bss->beacon_set = 1;
3546 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3550 msg = nlmsg_alloc();
3554 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3555 0, NL80211_CMD_DEL_BEACON, 0);
3556 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3558 return send_and_recv_msgs(drv, msg, NULL, NULL);
3564 static int i802_set_beacon_int(void *priv, int value)
3566 struct wpa_driver_nl80211_data *drv = priv;
3569 drv->beacon_int = value;
3571 if (!drv->bss.beacon_set)
3574 msg = nlmsg_alloc();
3578 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3579 "(beacon_set=%d)", value, drv->bss.beacon_set);
3580 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3581 0, NL80211_CMD_SET_BEACON, 0);
3582 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3584 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3586 return send_and_recv_msgs(drv, msg, NULL, NULL);
3592 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3594 struct wpa_driver_nl80211_data *drv = priv;
3597 msg = nlmsg_alloc();
3601 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3602 NL80211_CMD_SET_BSS, 0);
3605 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3607 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3609 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3611 /* TODO: multi-BSS support */
3612 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3614 return send_and_recv_msgs(drv, msg, NULL, NULL);
3620 static int i802_set_cts_protect(void *priv, int value)
3622 return i802_set_bss(priv, value, -1, -1);
3626 static int i802_set_preamble(void *priv, int value)
3628 return i802_set_bss(priv, -1, value, -1);
3632 static int i802_set_short_slot_time(void *priv, int value)
3634 return i802_set_bss(priv, -1, -1, value);
3638 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3641 case HOSTAPD_IF_VLAN:
3642 return NL80211_IFTYPE_AP_VLAN;
3643 case HOSTAPD_IF_WDS:
3644 return NL80211_IFTYPE_WDS;
3650 static int i802_if_add(const char *iface, void *priv,
3651 enum hostapd_driver_if_type type, char *ifname,
3654 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3660 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3661 char *ifname, const u8 *addr)
3663 /* unused at the moment */
3668 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3669 const char *ifname, const u8 *addr)
3671 nl80211_remove_iface(priv, if_nametoindex(ifname));
3676 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3677 const char *ifname, int vlan_id)
3679 struct wpa_driver_nl80211_data *drv = priv;
3682 msg = nlmsg_alloc();
3686 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3687 0, NL80211_CMD_SET_STATION, 0);
3689 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3690 if_nametoindex(drv->ifname));
3691 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3692 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3693 if_nametoindex(ifname));
3695 return send_and_recv_msgs(drv, msg, NULL, NULL);
3701 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3702 u8 *buf, size_t len,
3703 struct hostapd_frame_info *hfi,
3704 enum ieee80211_msg_type msg_type)
3706 struct hostapd_iface *iface = drv->hapd->iface;
3707 struct ieee80211_hdr *hdr;
3708 u16 fc, type, stype;
3709 size_t data_len = len;
3710 struct hostapd_data *hapd = NULL;
3711 int broadcast_bssid = 0;
3716 * PS-Poll frames are 16 bytes. All other frames are
3717 * 24 bytes or longer.
3722 hdr = (struct ieee80211_hdr *) buf;
3723 fc = le_to_host16(hdr->frame_control);
3725 type = WLAN_FC_GET_TYPE(fc);
3726 stype = WLAN_FC_GET_STYPE(fc);
3729 case WLAN_FC_TYPE_DATA:
3732 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3736 case WLAN_FC_FROMDS:
3744 case WLAN_FC_TYPE_CTRL:
3745 /* discard non-ps-poll frames */
3746 if (stype != WLAN_FC_STYPE_PSPOLL)
3750 case WLAN_FC_TYPE_MGMT:
3758 /* find interface frame belongs to */
3759 for (i = 0; i < iface->num_bss; i++) {
3760 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3761 hapd = iface->bss[i];
3767 hapd = iface->bss[0];
3769 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3770 bssid[2] != 0xff || bssid[3] != 0xff ||
3771 bssid[4] != 0xff || bssid[5] != 0xff) {
3773 * Unknown BSSID - drop frame if this is not from
3774 * passive scanning or a beacon (at least ProbeReq
3775 * frames to other APs may be allowed through RX
3776 * filtering in the wlan hw/driver)
3778 if ((type != WLAN_FC_TYPE_MGMT ||
3779 stype != WLAN_FC_STYPE_BEACON))
3782 broadcast_bssid = 1;
3786 case ieee80211_msg_normal:
3787 /* continue processing */
3789 case ieee80211_msg_tx_callback_ack:
3790 handle_tx_callback(hapd, buf, data_len, 1);
3792 case ieee80211_msg_tx_callback_fail:
3793 handle_tx_callback(hapd, buf, data_len, 0);
3798 case WLAN_FC_TYPE_MGMT:
3799 if (stype != WLAN_FC_STYPE_BEACON &&
3800 stype != WLAN_FC_STYPE_PROBE_REQ)
3801 wpa_printf(MSG_MSGDUMP, "MGMT");
3802 if (broadcast_bssid) {
3803 for (i = 0; i < iface->num_bss; i++)
3804 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3807 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3809 case WLAN_FC_TYPE_CTRL:
3810 /* can only get here with PS-Poll frames */
3811 wpa_printf(MSG_DEBUG, "CTRL");
3812 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3814 case WLAN_FC_TYPE_DATA:
3815 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3821 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3823 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3824 struct sockaddr_ll lladdr;
3825 unsigned char buf[3000];
3827 socklen_t fromlen = sizeof(lladdr);
3829 len = recvfrom(sock, buf, sizeof(buf), 0,
3830 (struct sockaddr *)&lladdr, &fromlen);
3836 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3837 struct hostapd_data *hapd;
3838 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3841 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3846 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3852 msg = nlmsg_alloc();
3856 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3857 0, NL80211_CMD_SET_INTERFACE, 0);
3858 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3859 if_nametoindex(ifname));
3860 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3862 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3866 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3872 #ifdef CONFIG_IEEE80211N
3873 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3874 int freq, u8 *ie, size_t ie_len)
3876 struct ieee802_11_elems elems;
3877 int ht, pri_chan = 0, sec_chan = 0;
3878 struct ieee80211_ht_operation *oper;
3879 struct hostapd_neighbor_bss *nnei;
3881 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3882 ht = elems.ht_capabilities || elems.ht_operation;
3883 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3884 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3885 pri_chan = oper->control_chan;
3886 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3887 if (oper->ht_param &
3888 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3889 sec_chan = pri_chan + 4;
3890 else if (oper->ht_param &
3891 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3892 sec_chan = pri_chan - 4;
3896 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3897 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3898 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3900 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3901 sizeof(struct hostapd_neighbor_bss));
3904 drv->neighbors = nnei;
3905 nnei = &nnei[drv->num_neighbors];
3906 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3909 nnei->pri_chan = pri_chan;
3910 nnei->sec_chan = sec_chan;
3911 drv->num_neighbors++;
3915 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3917 int divi = 1000000, i;
3919 if (iwe->u.freq.e == 0) {
3921 * Some drivers do not report frequency, but a channel.
3922 * Try to map this to frequency by assuming they are using
3923 * IEEE 802.11b/g. But don't overwrite a previously parsed
3924 * frequency if the driver sends both frequency and channel,
3925 * since the driver may be sending an A-band channel that we
3926 * don't handle here.
3932 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3933 *freq = 2407 + 5 * iwe->u.freq.m;
3935 } else if (iwe->u.freq.m == 14) {
3941 if (iwe->u.freq.e > 6) {
3942 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3943 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3947 for (i = 0; i < iwe->u.freq.e; i++)
3949 *freq = iwe->u.freq.m / divi;
3954 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3959 struct iw_event iwe_buf, *iwe = &iwe_buf;
3960 char *pos, *end, *custom;
3969 pos = (char *) res_buf;
3970 end = (char *) res_buf + len;
3972 while (pos + IW_EV_LCP_LEN <= end) {
3973 /* Event data may be unaligned, so make a local, aligned copy
3974 * before processing. */
3975 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3976 if (iwe->len <= IW_EV_LCP_LEN)
3979 custom = pos + IW_EV_POINT_LEN;
3980 if (iwe->cmd == IWEVGENIE) {
3981 /* WE-19 removed the pointer from struct iw_point */
3982 char *dpos = (char *) &iwe_buf.u.data.length;
3983 int dlen = dpos - (char *) &iwe_buf;
3984 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3985 sizeof(struct iw_event) - dlen);
3987 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3988 custom += IW_EV_POINT_OFF;
3994 i802_add_neighbor(drv, bssid, freq, ie,
3997 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
4003 i802_get_scan_freq(iwe, &freq);
4006 if (custom + iwe->u.data.length > end) {
4007 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4011 ie_len = iwe->u.data.length;
4019 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4025 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4032 res_buf_len = IW_SCAN_MAX_DATA;
4034 res_buf = os_malloc(res_buf_len);
4035 if (res_buf == NULL)
4037 os_memset(&iwr, 0, sizeof(iwr));
4038 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4039 iwr.u.data.pointer = res_buf;
4040 iwr.u.data.length = res_buf_len;
4042 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4045 if (errno == E2BIG && res_buf_len < 65535) {
4049 if (res_buf_len > 65535)
4050 res_buf_len = 65535; /* 16-bit length field */
4051 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4052 "trying larger buffer (%lu bytes)",
4053 (unsigned long) res_buf_len);
4055 perror("ioctl[SIOCGIWSCAN]");
4061 if (iwr.u.data.length > res_buf_len) {
4066 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4073 static int i802_is_event_wireless_scan_complete(char *data, int len)
4075 struct iw_event iwe_buf, *iwe = &iwe_buf;
4081 while (pos + IW_EV_LCP_LEN <= end) {
4082 /* Event data may be unaligned, so make a local, aligned copy
4083 * before processing. */
4084 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4085 if (iwe->cmd == SIOCGIWSCAN)
4095 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4097 struct ifinfomsg *ifi;
4098 int attrlen, _nlmsg_len, rta_len;
4099 struct rtattr *attr;
4101 if (len < (int) sizeof(*ifi))
4104 ifi = NLMSG_DATA(h);
4106 if (ifindex != ifi->ifi_index)
4107 return 0; /* event for foreign ifindex */
4109 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4111 attrlen = h->nlmsg_len - _nlmsg_len;
4115 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4117 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4118 while (RTA_OK(attr, attrlen)) {
4119 if (attr->rta_type == IFLA_WIRELESS &&
4120 i802_is_event_wireless_scan_complete(
4121 ((char *) attr) + rta_len,
4122 attr->rta_len - rta_len))
4124 attr = RTA_NEXT(attr, attrlen);
4131 static int i802_is_scan_complete(int s, int ifindex)
4137 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4139 perror("recv(netlink)");
4143 h = (struct nlmsghdr *) buf;
4144 while (left >= (int) sizeof(*h)) {
4148 plen = len - sizeof(*h);
4149 if (len > left || plen < 0) {
4150 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4151 "len=%d left=%d plen=%d",
4156 switch (h->nlmsg_type) {
4158 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4163 len = NLMSG_ALIGN(len);
4165 h = (struct nlmsghdr *) ((char *) h + len);
4172 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4175 int s, res, ifindex;
4176 struct sockaddr_nl local;
4181 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4182 "starting HT 20/40 MHz BSS");
4184 /* Request a new scan */
4185 /* TODO: would be enough to scan the selected band */
4186 os_memset(&iwr, 0, sizeof(iwr));
4187 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4188 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4189 perror("ioctl[SIOCSIWSCAN]");
4193 ifindex = if_nametoindex(drv->ifname);
4195 /* Wait for scan completion event or timeout */
4196 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4198 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4202 os_memset(&local, 0, sizeof(local));
4203 local.nl_family = AF_NETLINK;
4204 local.nl_groups = RTMGRP_LINK;
4205 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4206 perror("bind(netlink)");
4212 end += 30; /* Wait at most 30 seconds for scan results */
4215 tv.tv_sec = end > now ? end - now : 0;
4219 res = select(s + 1, &rfds, NULL, NULL, &tv);
4222 /* Assume results are ready after 10 seconds wait */
4226 if (i802_is_scan_complete(s, ifindex)) {
4227 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4232 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4233 /* Assume results are ready to be read now */
4240 return i802_get_ht_scan_res(drv);
4242 #endif /* CONFIG_IEEE80211N */
4245 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4250 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4251 if (drv->ioctl_sock < 0) {
4252 perror("socket[PF_INET,SOCK_DGRAM]");
4256 /* start listening for EAPOL on the default AP interface */
4257 add_ifidx(drv, if_nametoindex(drv->ifname));
4259 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4263 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4264 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4265 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4267 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4268 perror("ioctl(SIOCSIFHWADDR)");
4274 * initialise generic netlink and nl80211
4276 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4278 printf("Failed to allocate netlink callbacks.\n");
4282 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4283 if (!drv->nl_handle) {
4284 printf("Failed to allocate netlink handle.\n");
4288 if (genl_connect(drv->nl_handle)) {
4289 printf("Failed to connect to generic netlink.\n");
4293 #ifdef CONFIG_LIBNL20
4294 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4295 printf("Failed to allocate generic netlink cache.\n");
4298 #else /* CONFIG_LIBNL20 */
4299 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4300 if (!drv->nl_cache) {
4301 printf("Failed to allocate generic netlink cache.\n");
4304 #endif /* CONFIG_LIBNL20 */
4306 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4307 if (!drv->nl80211) {
4308 printf("nl80211 not found.\n");
4312 ret = nl_get_multicast_id(drv, "nl80211", "scan");
4314 ret = nl_socket_add_membership(drv->nl_handle, ret);
4316 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4317 "membership for scan events: %d (%s)",
4318 ret, strerror(-ret));
4321 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4323 ret = nl_socket_add_membership(drv->nl_handle, ret);
4325 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4326 "membership for mlme events: %d (%s)",
4327 ret, strerror(-ret));
4330 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4331 wpa_driver_nl80211_event_receive, drv,
4334 #ifdef CONFIG_IEEE80211N
4335 if (drv->ht_40mhz_scan) {
4336 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4337 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4338 i802_ht_scan(drv) ||
4339 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4340 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4341 "HT 40 MHz operations");
4345 #endif /* CONFIG_IEEE80211N */
4347 /* Initialise a monitor interface */
4348 if (nl80211_create_monitor_interface(drv))
4351 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4354 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4357 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4358 if (drv->eapol_sock < 0) {
4359 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4363 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4365 printf("Could not register read socket for eapol\n");
4369 memset(&ifr, 0, sizeof(ifr));
4370 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4371 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4372 perror("ioctl(SIOCGIFHWADDR)");
4376 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4377 printf("Invalid HW-addr family 0x%04x\n",
4378 ifr.ifr_hwaddr.sa_family);
4381 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4386 nl80211_remove_iface(drv, drv->monitor_ifidx);
4391 static int i802_get_inact_sec(void *priv, const u8 *addr)
4393 struct hostap_sta_driver_data data;
4396 data.inactive_msec = (unsigned long) -1;
4397 ret = i802_read_sta_data(priv, &data, addr);
4398 if (ret || data.inactive_msec == (unsigned long) -1)
4400 return data.inactive_msec / 1000;
4404 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4413 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4415 struct wpa_driver_nl80211_data *drv = priv;
4416 struct ieee80211_mgmt mgmt;
4418 memset(&mgmt, 0, sizeof(mgmt));
4419 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4420 WLAN_FC_STYPE_DEAUTH);
4421 memcpy(mgmt.da, addr, ETH_ALEN);
4422 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4423 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4424 mgmt.u.deauth.reason_code = host_to_le16(reason);
4425 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4427 sizeof(mgmt.u.deauth));
4431 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4433 struct wpa_driver_nl80211_data *drv = priv;
4434 struct ieee80211_mgmt mgmt;
4436 memset(&mgmt, 0, sizeof(mgmt));
4437 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4438 WLAN_FC_STYPE_DISASSOC);
4439 memcpy(mgmt.da, addr, ETH_ALEN);
4440 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4441 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4442 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4443 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4445 sizeof(mgmt.u.disassoc));
4449 static const struct hostapd_neighbor_bss *
4450 i802_get_neighbor_bss(void *priv, size_t *num)
4452 struct wpa_driver_nl80211_data *drv = priv;
4453 *num = drv->num_neighbors;
4454 return drv->neighbors;
4458 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
4460 struct wpa_driver_nl80211_data *drv;
4463 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4465 printf("Could not allocate memory for i802 driver data\n");
4470 memcpy(drv->ifname, hapd->conf->iface, sizeof(drv->ifname));
4471 memcpy(drv->bss.ifname, hapd->conf->iface, sizeof(drv->bss.ifname));
4472 drv->ifindex = if_nametoindex(drv->ifname);
4474 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4475 drv->if_indices = drv->default_if_indices;
4476 for (i = 0; i < hapd->iface->num_bss; i++) {
4477 struct hostapd_data *bss = hapd->iface->bss[i];
4478 if (bss->conf->bridge)
4479 add_ifidx(drv, if_nametoindex(bss->conf->bridge));
4481 drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
4483 if (i802_init_sockets(drv, bssid))
4494 static void *i802_init(struct hostapd_data *hapd)
4496 return i802_init_bssid(hapd, NULL);
4500 static void i802_deinit(void *priv)
4502 struct wpa_driver_nl80211_data *drv = priv;
4503 struct i802_bss *bss, *prev;
4505 if (drv->last_freq_ht) {
4506 /* Clear HT flags from the driver */
4507 struct hostapd_freq_params freq;
4508 os_memset(&freq, 0, sizeof(freq));
4509 freq.freq = drv->last_freq;
4510 i802_set_freq(priv, &freq);
4513 i802_del_beacon(drv);
4515 /* remove monitor interface */
4516 nl80211_remove_iface(drv, drv->monitor_ifidx);
4518 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4520 if (drv->monitor_sock >= 0) {
4521 eloop_unregister_read_sock(drv->monitor_sock);
4522 close(drv->monitor_sock);
4524 if (drv->ioctl_sock >= 0)
4525 close(drv->ioctl_sock);
4526 if (drv->eapol_sock >= 0) {
4527 eloop_unregister_read_sock(drv->eapol_sock);
4528 close(drv->eapol_sock);
4531 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4532 genl_family_put(drv->nl80211);
4533 nl_cache_free(drv->nl_cache);
4534 nl_handle_destroy(drv->nl_handle);
4535 nl_cb_put(drv->nl_cb);
4537 if (drv->if_indices != drv->default_if_indices)
4538 free(drv->if_indices);
4540 os_free(drv->neighbors);
4542 bss = drv->bss.next;
4552 #endif /* HOSTAPD */
4555 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4557 .desc = "Linux nl80211/cfg80211",
4558 .get_bssid = wpa_driver_nl80211_get_bssid,
4559 .get_ssid = wpa_driver_nl80211_get_ssid,
4560 .set_key = wpa_driver_nl80211_set_key,
4561 .scan2 = wpa_driver_nl80211_scan,
4562 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4563 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4564 .disassociate = wpa_driver_nl80211_disassociate,
4565 .authenticate = wpa_driver_nl80211_authenticate,
4566 .associate = wpa_driver_nl80211_associate,
4567 .init = wpa_driver_nl80211_init,
4568 .deinit = wpa_driver_nl80211_deinit,
4569 .get_capa = wpa_driver_nl80211_get_capa,
4570 .set_operstate = wpa_driver_nl80211_set_operstate,
4571 .set_country = wpa_driver_nl80211_set_country,
4573 .set_beacon = wpa_driver_nl80211_set_beacon,
4574 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4575 .send_mlme = wpa_driver_nl80211_send_mlme,
4576 #endif /* CONFIG_AP */
4577 #if defined(CONFIG_AP) || defined(HOSTAPD)
4578 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4579 #endif /* CONFIG_AP || HOSTAPD */
4581 .hapd_init = i802_init,
4582 .init_bssid = i802_init_bssid,
4583 .hapd_deinit = i802_deinit,
4584 .hapd_set_key = i802_set_key,
4585 .get_seqnum = i802_get_seqnum,
4586 .flush = i802_flush,
4587 .read_sta_data = i802_read_sta_data,
4588 .hapd_send_eapol = i802_send_eapol,
4589 .sta_set_flags = i802_sta_set_flags,
4590 .sta_deauth = i802_sta_deauth,
4591 .sta_disassoc = i802_sta_disassoc,
4592 .sta_remove = i802_sta_remove,
4593 .sta_add = i802_sta_add,
4594 .get_inact_sec = i802_get_inact_sec,
4595 .sta_clear_stats = i802_sta_clear_stats,
4596 .set_freq = i802_set_freq,
4597 .set_rts = i802_set_rts,
4598 .set_frag = i802_set_frag,
4599 .set_retry = i802_set_retry,
4600 .set_rate_sets = i802_set_rate_sets,
4601 .hapd_set_beacon = i802_set_beacon,
4602 .hapd_set_beacon_int = i802_set_beacon_int,
4603 .set_cts_protect = i802_set_cts_protect,
4604 .set_preamble = i802_set_preamble,
4605 .set_short_slot_time = i802_set_short_slot_time,
4606 .set_tx_queue_params = i802_set_tx_queue_params,
4607 .bss_add = i802_bss_add,
4608 .bss_remove = i802_bss_remove,
4609 .if_add = i802_if_add,
4610 .if_update = i802_if_update,
4611 .if_remove = i802_if_remove,
4612 .set_sta_vlan = i802_set_sta_vlan,
4613 .get_neighbor_bss = i802_get_neighbor_bss,
4614 #endif /* HOSTAPD */