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 "../../hostapd/hostapd.h"
52 #include "../../hostapd/sta_flags.h"
53 #include "ieee802_11_common.h"
56 /* libnl 2.0 compatibility code */
57 #define nl_handle_alloc_cb nl_socket_alloc_cb
58 #define nl_handle_destroy nl_socket_free
59 #endif /* CONFIG_LIBNL20 */
65 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
68 #define IFF_DORMANT 0x20000 /* driver signals dormant */
71 #ifndef IF_OPER_DORMANT
72 #define IF_OPER_DORMANT 5
78 enum ieee80211_msg_type {
79 ieee80211_msg_normal = 0,
80 ieee80211_msg_tx_callback_ack = 1,
81 ieee80211_msg_tx_callback_fail = 2,
85 struct i802_bss *next;
87 unsigned int beacon_set:1;
90 struct wpa_driver_nl80211_data {
93 int ioctl_sock; /* socket for ioctl() use */
94 char ifname[IFNAMSIZ + 1];
97 struct wpa_driver_capa capa;
102 int scan_complete_events;
104 struct nl_handle *nl_handle;
105 struct nl_cache *nl_cache;
107 struct genl_family *nl80211;
116 unsigned int beacon_set:1;
119 #endif /* CONFIG_AP */
122 struct hostapd_data *hapd;
124 int eapol_sock; /* socket for EAPOL frames */
125 int monitor_sock; /* socket for monitor */
128 int default_if_indices[16];
134 unsigned int ht_40mhz_scan:1;
138 struct hostapd_neighbor_bss *neighbors;
139 size_t num_neighbors;
144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
146 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
149 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
152 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
154 #endif /* CONFIG_AP */
157 static void handle_frame(struct wpa_driver_nl80211_data *drv,
159 struct hostapd_frame_info *hfi,
160 enum ieee80211_msg_type msg_type);
161 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
162 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
163 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
169 static int ack_handler(struct nl_msg *msg, void *arg)
176 static int finish_handler(struct nl_msg *msg, void *arg)
183 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
192 static int no_seq_check(struct nl_msg *msg, void *arg)
198 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
200 int (*valid_handler)(struct nl_msg *, void *),
206 cb = nl_cb_clone(drv->nl_cb);
210 err = nl_send_auto_complete(drv->nl_handle, msg);
216 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
217 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
218 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
221 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
222 valid_handler, valid_data);
225 nl_recvmsgs(drv->nl_handle, cb);
239 static int family_handler(struct nl_msg *msg, void *arg)
241 struct family_data *res = arg;
242 struct nlattr *tb[CTRL_ATTR_MAX + 1];
243 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
244 struct nlattr *mcgrp;
247 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
248 genlmsg_attrlen(gnlh, 0), NULL);
249 if (!tb[CTRL_ATTR_MCAST_GROUPS])
252 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
253 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
254 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
255 nla_len(mcgrp), NULL);
256 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
257 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
258 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
260 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
262 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
270 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
271 const char *family, const char *group)
275 struct family_data res = { group, -ENOENT };
280 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
281 0, 0, CTRL_CMD_GETFAMILY, 0);
282 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
284 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
295 static int wpa_driver_nl80211_send_oper_ifla(
296 struct wpa_driver_nl80211_data *drv,
297 int linkmode, int operstate)
301 struct ifinfomsg ifinfo;
308 os_memset(&req, 0, sizeof(req));
310 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
311 req.hdr.nlmsg_type = RTM_SETLINK;
312 req.hdr.nlmsg_flags = NLM_F_REQUEST;
313 req.hdr.nlmsg_seq = ++nl_seq;
314 req.hdr.nlmsg_pid = 0;
316 req.ifinfo.ifi_family = AF_UNSPEC;
317 req.ifinfo.ifi_type = 0;
318 req.ifinfo.ifi_index = drv->ifindex;
319 req.ifinfo.ifi_flags = 0;
320 req.ifinfo.ifi_change = 0;
322 if (linkmode != -1) {
323 rta = (struct rtattr *)
324 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
325 rta->rta_type = IFLA_LINKMODE;
326 rta->rta_len = RTA_LENGTH(sizeof(char));
327 *((char *) RTA_DATA(rta)) = linkmode;
328 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
329 RTA_LENGTH(sizeof(char));
331 if (operstate != -1) {
332 rta = (struct rtattr *)
333 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
334 rta->rta_type = IFLA_OPERSTATE;
335 rta->rta_len = RTA_LENGTH(sizeof(char));
336 *((char *) RTA_DATA(rta)) = operstate;
337 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
338 RTA_LENGTH(sizeof(char));
341 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
342 linkmode, operstate);
344 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
346 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
347 "%s (assume operstate is not supported)",
351 return ret < 0 ? -1 : 0;
355 static int wpa_driver_nl80211_set_auth_param(
356 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
361 os_memset(&iwr, 0, sizeof(iwr));
362 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
363 iwr.u.param.flags = idx & IW_AUTH_INDEX;
364 iwr.u.param.value = value;
366 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
367 if (errno != EOPNOTSUPP) {
368 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
369 "value 0x%x) failed: %s)",
370 idx, value, strerror(errno));
372 ret = errno == EOPNOTSUPP ? -2 : -1;
379 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
381 struct wpa_driver_nl80211_data *drv = priv;
382 if (!drv->associated)
384 os_memcpy(bssid, drv->bssid, ETH_ALEN);
389 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
391 struct wpa_driver_nl80211_data *drv = priv;
392 if (!drv->associated)
394 os_memcpy(ssid, drv->ssid, drv->ssid_len);
395 return drv->ssid_len;
400 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
401 void *ctx, char *buf, size_t len,
404 union wpa_event_data event;
406 os_memset(&event, 0, sizeof(event));
407 if (len > sizeof(event.interface_status.ifname))
408 len = sizeof(event.interface_status.ifname) - 1;
409 os_memcpy(event.interface_status.ifname, buf, len);
410 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
411 EVENT_INTERFACE_ADDED;
413 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
415 event.interface_status.ifname,
416 del ? "removed" : "added");
418 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
425 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
429 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
432 struct ifinfomsg *ifi;
433 int attrlen, _nlmsg_len, rta_len;
438 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
440 attrlen = h->nlmsg_len - _nlmsg_len;
444 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
446 rta_len = RTA_ALIGN(sizeof(struct rtattr));
447 while (RTA_OK(attr, attrlen)) {
448 if (attr->rta_type == IFLA_IFNAME) {
449 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
455 attr = RTA_NEXT(attr, attrlen);
462 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
463 int ifindex, struct nlmsghdr *h)
465 if (drv->ifindex == ifindex)
468 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
469 drv->ifindex = if_nametoindex(drv->ifname);
470 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
472 wpa_driver_nl80211_finish_drv_init(drv);
480 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
481 void *ctx, struct nlmsghdr *h,
484 struct ifinfomsg *ifi;
485 int attrlen, _nlmsg_len, rta_len;
486 struct rtattr * attr;
488 if (len < sizeof(*ifi))
493 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
494 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
499 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
501 drv->operstate, ifi->ifi_flags,
502 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
503 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
504 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
505 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
507 * Some drivers send the association event before the operup event--in
508 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
509 * fails. This will hit us when wpa_supplicant does not need to do
510 * IEEE 802.1X authentication
512 if (drv->operstate == 1 &&
513 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
514 !(ifi->ifi_flags & IFF_RUNNING))
515 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
517 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
519 attrlen = h->nlmsg_len - _nlmsg_len;
523 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
525 rta_len = RTA_ALIGN(sizeof(struct rtattr));
526 while (RTA_OK(attr, attrlen)) {
527 if (attr->rta_type == IFLA_IFNAME) {
528 wpa_driver_nl80211_event_link(
530 ((char *) attr) + rta_len,
531 attr->rta_len - rta_len, 0);
533 attr = RTA_NEXT(attr, attrlen);
538 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
539 void *ctx, struct nlmsghdr *h,
542 struct ifinfomsg *ifi;
543 int attrlen, _nlmsg_len, rta_len;
544 struct rtattr * attr;
546 if (len < sizeof(*ifi))
551 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
553 attrlen = h->nlmsg_len - _nlmsg_len;
557 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
559 rta_len = RTA_ALIGN(sizeof(struct rtattr));
560 while (RTA_OK(attr, attrlen)) {
561 if (attr->rta_type == IFLA_IFNAME) {
562 wpa_driver_nl80211_event_link(
564 ((char *) attr) + rta_len,
565 attr->rta_len - rta_len, 1);
567 attr = RTA_NEXT(attr, attrlen);
572 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
577 struct sockaddr_nl from;
583 fromlen = sizeof(from);
584 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
585 (struct sockaddr *) &from, &fromlen);
587 if (errno != EINTR && errno != EAGAIN)
588 perror("recvfrom(netlink)");
592 h = (struct nlmsghdr *) buf;
593 while (left >= (int) sizeof(*h)) {
597 plen = len - sizeof(*h);
598 if (len > left || plen < 0) {
599 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
600 "len=%d left=%d plen=%d",
605 switch (h->nlmsg_type) {
607 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
611 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
616 len = NLMSG_ALIGN(len);
618 h = (struct nlmsghdr *) ((char *) h + len);
622 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
626 if (--max_events > 0) {
628 * Try to receive all events in one eloop call in order to
629 * limit race condition on cases where AssocInfo event, Assoc
630 * event, and EAPOL frames are received more or less at the
631 * same time. We want to process the event messages first
632 * before starting EAPOL processing.
639 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
640 const u8 *frame, size_t len)
642 const struct ieee80211_mgmt *mgmt;
643 union wpa_event_data event;
645 mgmt = (const struct ieee80211_mgmt *) frame;
646 if (len < 24 + sizeof(mgmt->u.auth)) {
647 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
652 os_memset(&event, 0, sizeof(event));
653 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
654 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
655 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
656 if (len > 24 + sizeof(mgmt->u.auth)) {
657 event.auth.ies = mgmt->u.auth.variable;
658 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
661 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
665 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
666 const u8 *frame, size_t len)
668 const struct ieee80211_mgmt *mgmt;
669 union wpa_event_data event;
672 mgmt = (const struct ieee80211_mgmt *) frame;
673 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
674 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
679 status = le_to_host16(mgmt->u.assoc_resp.status_code);
680 if (status != WLAN_STATUS_SUCCESS) {
681 os_memset(&event, 0, sizeof(event));
682 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
683 event.assoc_reject.resp_ies =
684 (u8 *) mgmt->u.assoc_resp.variable;
685 event.assoc_reject.resp_ies_len =
686 len - 24 - sizeof(mgmt->u.assoc_resp);
688 event.assoc_reject.status_code = status;
690 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
695 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
697 os_memset(&event, 0, sizeof(event));
698 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
699 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
700 event.assoc_info.resp_ies_len =
701 len - 24 - sizeof(mgmt->u.assoc_resp);
704 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
708 static void mlme_event(struct wpa_driver_nl80211_data *drv,
709 enum nl80211_commands cmd, struct nlattr *frame)
712 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
717 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
718 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
719 nla_data(frame), nla_len(frame));
722 case NL80211_CMD_AUTHENTICATE:
723 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
725 case NL80211_CMD_ASSOCIATE:
726 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
728 case NL80211_CMD_DEAUTHENTICATE:
730 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
732 case NL80211_CMD_DISASSOCIATE:
734 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
744 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
748 if (tb[NL80211_ATTR_MAC])
749 hostapd_michael_mic_failure(drv->hapd,
750 nla_data(tb[NL80211_ATTR_MAC]));
752 union wpa_event_data data;
754 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
755 os_memset(&data, 0, sizeof(data));
756 if (tb[NL80211_ATTR_MAC]) {
757 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
758 nla_data(tb[NL80211_ATTR_MAC]),
759 nla_len(tb[NL80211_ATTR_MAC]));
761 if (tb[NL80211_ATTR_KEY_SEQ]) {
762 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
763 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
764 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
766 if (tb[NL80211_ATTR_KEY_TYPE]) {
767 enum nl80211_key_type key_type =
768 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
769 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
770 if (key_type == NL80211_KEYTYPE_PAIRWISE)
771 data.michael_mic_failure.unicast = 1;
773 data.michael_mic_failure.unicast = 1;
775 if (tb[NL80211_ATTR_KEY_IDX]) {
776 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
777 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
780 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
785 static int process_event(struct nl_msg *msg, void *arg)
787 struct wpa_driver_nl80211_data *drv = arg;
788 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
789 struct nlattr *tb[NL80211_ATTR_MAX + 1];
791 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
792 genlmsg_attrlen(gnlh, 0), NULL);
794 if (tb[NL80211_ATTR_IFINDEX]) {
795 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
796 if (ifindex != drv->ifindex) {
797 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
798 " for foreign interface (ifindex %d)",
806 case NL80211_CMD_NEW_SCAN_RESULTS:
807 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
808 drv->scan_complete_events = 1;
809 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
811 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
813 case NL80211_CMD_SCAN_ABORTED:
814 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
816 * Need to indicate that scan results are available in order
817 * not to make wpa_supplicant stop its scanning.
819 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
821 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
823 case NL80211_CMD_AUTHENTICATE:
824 case NL80211_CMD_ASSOCIATE:
825 case NL80211_CMD_DEAUTHENTICATE:
826 case NL80211_CMD_DISASSOCIATE:
827 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
830 case NL80211_CMD_MICHAEL_MIC_FAILURE:
831 mlme_event_michael_mic_failure(drv, tb);
834 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
835 "(cmd=%d)", gnlh->cmd);
843 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
847 struct wpa_driver_nl80211_data *drv = eloop_ctx;
849 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
851 cb = nl_cb_clone(drv->nl_cb);
854 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
855 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
856 nl_recvmsgs(drv->nl_handle, cb);
861 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
862 const char *ifname, int dev_up)
866 if (drv->ioctl_sock < 0)
869 os_memset(&ifr, 0, sizeof(ifr));
870 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
872 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
873 perror("ioctl[SIOCGIFFLAGS]");
874 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
880 if (ifr.ifr_flags & IFF_UP)
882 ifr.ifr_flags |= IFF_UP;
884 if (!(ifr.ifr_flags & IFF_UP))
886 ifr.ifr_flags &= ~IFF_UP;
889 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
890 perror("ioctl[SIOCSIFFLAGS]");
899 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
900 * @priv: driver_nl80211 private data
901 * @alpha2_arg: country to which to switch to
902 * Returns: 0 on success, -1 on failure
904 * This asks nl80211 to set the regulatory domain for given
905 * country ISO / IEC alpha2.
907 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
909 struct wpa_driver_nl80211_data *drv = priv;
917 alpha2[0] = alpha2_arg[0];
918 alpha2[1] = alpha2_arg[1];
921 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
922 0, NL80211_CMD_REQ_SET_REG, 0);
924 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
925 if (send_and_recv_msgs(drv, msg, NULL, NULL))
933 struct wiphy_info_data {
939 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
941 struct nlattr *tb[NL80211_ATTR_MAX + 1];
942 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
943 struct wiphy_info_data *info = arg;
945 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
946 genlmsg_attrlen(gnlh, 0), NULL);
948 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
949 info->max_scan_ssids =
950 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
952 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
953 struct nlattr *nl_mode;
955 nla_for_each_nested(nl_mode,
956 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
957 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
958 info->ap_supported = 1;
968 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
969 struct wiphy_info_data *info)
973 os_memset(info, 0, sizeof(*info));
978 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
979 0, NL80211_CMD_GET_WIPHY, 0);
981 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
983 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
992 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
994 struct wiphy_info_data info;
995 if (wpa_driver_nl80211_get_info(drv, &info))
997 drv->has_capability = 1;
998 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
999 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1000 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1001 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1002 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1003 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1004 WPA_DRIVER_CAPA_ENC_WEP104 |
1005 WPA_DRIVER_CAPA_ENC_TKIP |
1006 WPA_DRIVER_CAPA_ENC_CCMP;
1008 drv->capa.max_scan_ssids = info.max_scan_ssids;
1009 if (info.ap_supported)
1010 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1015 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1016 * @ctx: context to be used when calling wpa_supplicant functions,
1017 * e.g., wpa_supplicant_event()
1018 * @ifname: interface name, e.g., wlan0
1019 * Returns: Pointer to private data, %NULL on failure
1021 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1024 struct sockaddr_nl local;
1025 struct wpa_driver_nl80211_data *drv;
1027 drv = os_zalloc(sizeof(*drv));
1031 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1033 drv->monitor_ifidx = -1;
1034 drv->monitor_sock = -1;
1035 #endif /* CONFIG_AP */
1037 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1038 if (drv->nl_cb == NULL) {
1039 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1044 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1045 if (drv->nl_handle == NULL) {
1046 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1051 if (genl_connect(drv->nl_handle)) {
1052 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1057 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1058 if (drv->nl_cache == NULL) {
1059 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1064 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1065 if (drv->nl80211 == NULL) {
1066 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1071 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1073 ret = nl_socket_add_membership(drv->nl_handle, ret);
1075 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1076 "membership for scan events: %d (%s)",
1077 ret, strerror(-ret));
1081 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1083 ret = nl_socket_add_membership(drv->nl_handle, ret);
1085 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1086 "membership for mlme events: %d (%s)",
1087 ret, strerror(-ret));
1090 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1092 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1093 wpa_driver_nl80211_event_receive, drv, ctx);
1095 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1096 if (drv->ioctl_sock < 0) {
1097 perror("socket(PF_INET,SOCK_DGRAM)");
1101 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1103 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1107 os_memset(&local, 0, sizeof(local));
1108 local.nl_family = AF_NETLINK;
1109 local.nl_groups = RTMGRP_LINK;
1110 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1111 perror("bind(netlink)");
1117 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1119 #endif /* HOSTAPD */
1120 drv->link_event_sock = s;
1122 if (wpa_driver_nl80211_finish_drv_init(drv))
1128 eloop_unregister_read_sock(drv->link_event_sock);
1129 close(drv->link_event_sock);
1131 close(drv->ioctl_sock);
1133 genl_family_put(drv->nl80211);
1135 nl_cache_free(drv->nl_cache);
1137 nl_handle_destroy(drv->nl_handle);
1139 nl_cb_put(drv->nl_cb);
1147 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1149 drv->ifindex = if_nametoindex(drv->ifname);
1151 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1152 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1153 "use managed mode");
1156 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1157 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1162 wpa_driver_nl80211_capa(drv);
1164 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1171 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1172 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1174 * Shut down driver interface and processing of driver events. Free
1175 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1177 static void wpa_driver_nl80211_deinit(void *priv)
1179 struct wpa_driver_nl80211_data *drv = priv;
1182 if (drv->monitor_ifidx >= 0)
1183 nl80211_remove_iface(drv, drv->monitor_ifidx);
1184 if (drv->monitor_sock >= 0) {
1185 eloop_unregister_read_sock(drv->monitor_sock);
1186 close(drv->monitor_sock);
1188 #endif /* CONFIG_AP */
1190 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1192 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1194 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1196 eloop_unregister_read_sock(drv->link_event_sock);
1198 hostapd_set_iface_flags(drv, drv->ifname, 0);
1199 wpa_driver_nl80211_set_mode(drv, 0);
1201 close(drv->link_event_sock);
1202 close(drv->ioctl_sock);
1204 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1205 genl_family_put(drv->nl80211);
1206 nl_cache_free(drv->nl_cache);
1207 nl_handle_destroy(drv->nl_handle);
1208 nl_cb_put(drv->nl_cb);
1215 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1216 * @eloop_ctx: Unused
1217 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1219 * This function can be used as registered timeout when starting a scan to
1220 * generate a scan completed event if the driver does not report this.
1222 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1224 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1226 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1227 #endif /* HOSTAPD */
1232 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1233 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1234 * @params: Scan parameters
1235 * Returns: 0 on success, -1 on failure
1237 static int wpa_driver_nl80211_scan(void *priv,
1238 struct wpa_driver_scan_params *params)
1240 struct wpa_driver_nl80211_data *drv = priv;
1241 int ret = 0, timeout;
1242 struct nl_msg *msg, *ssids, *freqs;
1245 msg = nlmsg_alloc();
1246 ssids = nlmsg_alloc();
1247 freqs = nlmsg_alloc();
1248 if (!msg || !ssids || !freqs) {
1255 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1256 NL80211_CMD_TRIGGER_SCAN, 0);
1258 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1260 for (i = 0; i < params->num_ssids; i++) {
1261 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1262 params->ssids[i].ssid);
1264 if (params->num_ssids)
1265 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1267 if (params->extra_ies) {
1268 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1272 if (params->freqs) {
1273 for (i = 0; params->freqs[i]; i++)
1274 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1275 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1278 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1281 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1282 "(%s)", ret, strerror(-ret));
1283 goto nla_put_failure;
1286 /* Not all drivers generate "scan completed" wireless event, so try to
1287 * read results after a timeout. */
1289 if (drv->scan_complete_events) {
1291 * The driver seems to deliver events to notify when scan is
1292 * complete, so use longer timeout to avoid race conditions
1293 * with scanning and following association request.
1297 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1298 "seconds", ret, timeout);
1299 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1300 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1311 static int bss_info_handler(struct nl_msg *msg, void *arg)
1313 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1314 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1315 struct nlattr *bss[NL80211_BSS_MAX + 1];
1316 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1317 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1318 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1319 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1320 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1321 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1322 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1323 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1324 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1326 struct wpa_scan_results *res = arg;
1327 struct wpa_scan_res **tmp;
1328 struct wpa_scan_res *r;
1332 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1333 genlmsg_attrlen(gnlh, 0), NULL);
1334 if (!tb[NL80211_ATTR_BSS])
1336 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1339 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1340 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1341 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1347 r = os_zalloc(sizeof(*r) + ie_len);
1350 if (bss[NL80211_BSS_BSSID])
1351 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1353 if (bss[NL80211_BSS_FREQUENCY])
1354 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1355 if (bss[NL80211_BSS_BEACON_INTERVAL])
1356 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1357 if (bss[NL80211_BSS_CAPABILITY])
1358 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1359 r->flags |= WPA_SCAN_NOISE_INVALID;
1360 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1361 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1362 r->level /= 100; /* mBm to dBm */
1363 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1364 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1365 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1366 r->flags |= WPA_SCAN_LEVEL_INVALID;
1368 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1369 if (bss[NL80211_BSS_TSF])
1370 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1373 os_memcpy(r + 1, ie, ie_len);
1375 tmp = os_realloc(res->res,
1376 (res->num + 1) * sizeof(struct wpa_scan_res *));
1381 tmp[res->num++] = r;
1389 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1390 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1391 * Returns: Scan results on success, -1 on failure
1393 static struct wpa_scan_results *
1394 wpa_driver_nl80211_get_scan_results(void *priv)
1396 struct wpa_driver_nl80211_data *drv = priv;
1398 struct wpa_scan_results *res;
1401 res = os_zalloc(sizeof(*res));
1404 msg = nlmsg_alloc();
1406 goto nla_put_failure;
1408 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1409 NL80211_CMD_GET_SCAN, 0);
1410 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1412 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1415 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1416 (unsigned long) res->num);
1419 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1420 "(%s)", ret, strerror(-ret));
1423 wpa_scan_results_free(res);
1428 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1429 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1430 const u8 *seq, size_t seq_len,
1431 const u8 *key, size_t key_len)
1436 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1437 "set_tx=%d seq_len=%lu key_len=%lu",
1438 __func__, ifindex, alg, addr, key_idx, set_tx,
1439 (unsigned long) seq_len, (unsigned long) key_len);
1441 msg = nlmsg_alloc();
1445 if (alg == WPA_ALG_NONE) {
1446 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1447 0, NL80211_CMD_DEL_KEY, 0);
1449 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1450 0, NL80211_CMD_NEW_KEY, 0);
1451 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1455 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1458 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1462 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1465 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1468 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1471 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1472 "algorithm %d", __func__, alg);
1479 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1481 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1483 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1484 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1486 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1487 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1489 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1490 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1493 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1494 ret, strerror(-ret));
1497 * If we failed or don't need to set the default TX key (below),
1500 if (ret || !set_tx || alg == WPA_ALG_NONE)
1502 #ifdef HOSTAPD /* FIX: is this needed? */
1505 #endif /* HOSTAPD */
1507 msg = nlmsg_alloc();
1511 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1512 0, NL80211_CMD_SET_KEY, 0);
1513 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1514 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1515 if (alg == WPA_ALG_IGTK)
1516 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1518 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1520 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1524 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1525 "err=%d %s)", ret, strerror(-ret));
1533 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1534 const u8 *addr, int key_idx,
1535 int set_tx, const u8 *seq,
1537 const u8 *key, size_t key_len)
1539 struct wpa_driver_nl80211_data *drv = priv;
1540 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1541 seq_len, key, key_len);
1545 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1546 const u8 *addr, int cmd, u16 reason_code)
1551 msg = nlmsg_alloc();
1555 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1557 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1558 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1559 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1561 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1564 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1565 "(%s)", ret, strerror(-ret));
1566 goto nla_put_failure;
1576 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1579 struct wpa_driver_nl80211_data *drv = priv;
1580 wpa_printf(MSG_DEBUG, "%s", __func__);
1581 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1586 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1589 struct wpa_driver_nl80211_data *drv = priv;
1590 wpa_printf(MSG_DEBUG, "%s", __func__);
1591 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1596 static int wpa_driver_nl80211_authenticate(
1597 void *priv, struct wpa_driver_auth_params *params)
1599 struct wpa_driver_nl80211_data *drv = priv;
1602 enum nl80211_auth_type type;
1604 drv->associated = 0;
1606 msg = nlmsg_alloc();
1610 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1613 for (i = 0; i < 4; i++) {
1614 if (!params->wep_key[i])
1616 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1617 i == params->wep_tx_keyidx, NULL, 0,
1619 params->wep_key_len[i]);
1622 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1623 NL80211_CMD_AUTHENTICATE, 0);
1625 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1626 if (params->bssid) {
1627 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1628 MAC2STR(params->bssid));
1629 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1632 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1633 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1636 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1637 params->ssid, params->ssid_len);
1638 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1641 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1643 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1645 * TODO: if multiple auth_alg options enabled, try them one by one if
1646 * the AP rejects authentication due to unknown auth alg
1648 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1649 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1650 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1651 type = NL80211_AUTHTYPE_SHARED_KEY;
1652 else if (params->auth_alg & AUTH_ALG_LEAP)
1653 type = NL80211_AUTHTYPE_NETWORK_EAP;
1654 else if (params->auth_alg & AUTH_ALG_FT)
1655 type = NL80211_AUTHTYPE_FT;
1657 goto nla_put_failure;
1658 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1659 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1661 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1664 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1665 "(%s)", ret, strerror(-ret));
1666 goto nla_put_failure;
1669 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1678 #if defined(CONFIG_AP) || defined(HOSTAPD)
1680 struct phy_info_arg {
1682 struct hostapd_hw_modes *modes;
1685 static int phy_info_handler(struct nl_msg *msg, void *arg)
1687 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1688 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1689 struct phy_info_arg *phy_info = arg;
1691 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1693 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1694 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1695 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1696 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1697 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1698 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1699 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1700 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1703 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1704 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1705 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1706 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1709 struct nlattr *nl_band;
1710 struct nlattr *nl_freq;
1711 struct nlattr *nl_rate;
1712 int rem_band, rem_freq, rem_rate;
1713 struct hostapd_hw_modes *mode;
1714 int idx, mode_is_set;
1716 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1717 genlmsg_attrlen(gnlh, 0), NULL);
1719 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1722 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1723 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1726 phy_info->modes = mode;
1730 mode = &phy_info->modes[*(phy_info->num_modes)];
1731 memset(mode, 0, sizeof(*mode));
1732 *(phy_info->num_modes) += 1;
1734 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1735 nla_len(nl_band), NULL);
1737 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1738 mode->ht_capab = nla_get_u16(
1739 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1742 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1743 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1744 nla_len(nl_freq), freq_policy);
1745 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1747 mode->num_channels++;
1750 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1751 if (!mode->channels)
1756 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1757 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1758 nla_len(nl_freq), freq_policy);
1759 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1762 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1763 mode->channels[idx].flag = 0;
1766 /* crude heuristic */
1767 if (mode->channels[idx].freq < 4000)
1768 mode->mode = HOSTAPD_MODE_IEEE80211B;
1770 mode->mode = HOSTAPD_MODE_IEEE80211A;
1774 /* crude heuristic */
1775 if (mode->channels[idx].freq < 4000)
1776 if (mode->channels[idx].freq == 2484)
1777 mode->channels[idx].chan = 14;
1779 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1781 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1783 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1784 mode->channels[idx].flag |=
1785 HOSTAPD_CHAN_DISABLED;
1786 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1787 mode->channels[idx].flag |=
1788 HOSTAPD_CHAN_PASSIVE_SCAN;
1789 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1790 mode->channels[idx].flag |=
1791 HOSTAPD_CHAN_NO_IBSS;
1792 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1793 mode->channels[idx].flag |=
1796 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1797 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1798 mode->channels[idx].max_tx_power =
1799 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1804 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1805 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1806 nla_len(nl_rate), rate_policy);
1807 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1812 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1818 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1819 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1820 nla_len(nl_rate), rate_policy);
1821 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1823 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1825 /* crude heuristic */
1826 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1827 mode->rates[idx].rate > 200)
1828 mode->mode = HOSTAPD_MODE_IEEE80211G;
1830 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1831 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1840 static struct hostapd_hw_modes *
1841 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1844 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1845 int i, mode11g_idx = -1;
1847 /* If only 802.11g mode is included, use it to construct matching
1848 * 802.11b mode data. */
1850 for (m = 0; m < *num_modes; m++) {
1851 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1852 return modes; /* 802.11b already included */
1853 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1857 if (mode11g_idx < 0)
1858 return modes; /* 2.4 GHz band not supported at all */
1860 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1862 return modes; /* Could not add 802.11b mode */
1864 mode = &nmodes[*num_modes];
1865 os_memset(mode, 0, sizeof(*mode));
1869 mode->mode = HOSTAPD_MODE_IEEE80211B;
1871 mode11g = &modes[mode11g_idx];
1872 mode->num_channels = mode11g->num_channels;
1873 mode->channels = os_malloc(mode11g->num_channels *
1874 sizeof(struct hostapd_channel_data));
1875 if (mode->channels == NULL) {
1877 return modes; /* Could not add 802.11b mode */
1879 os_memcpy(mode->channels, mode11g->channels,
1880 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1882 mode->num_rates = 0;
1883 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1884 if (mode->rates == NULL) {
1885 os_free(mode->channels);
1887 return modes; /* Could not add 802.11b mode */
1890 for (i = 0; i < mode11g->num_rates; i++) {
1891 if (mode11g->rates[i].rate > 110 ||
1892 mode11g->rates[i].flags &
1893 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1895 mode->rates[mode->num_rates] = mode11g->rates[i];
1897 if (mode->num_rates == 4)
1901 if (mode->num_rates == 0) {
1902 os_free(mode->channels);
1903 os_free(mode->rates);
1905 return modes; /* No 802.11b rates */
1908 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1915 static struct hostapd_hw_modes *
1916 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1918 struct wpa_driver_nl80211_data *drv = priv;
1920 struct phy_info_arg result = {
1921 .num_modes = num_modes,
1928 msg = nlmsg_alloc();
1932 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1933 0, NL80211_CMD_GET_WIPHY, 0);
1935 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1937 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1938 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1944 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1945 const void *data, size_t len,
1949 0x00, 0x00, /* radiotap version */
1950 0x0e, 0x00, /* radiotap length */
1951 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1952 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1954 0x00, 0x00, /* RX and TX flags to indicate that */
1955 0x00, 0x00, /* this is the injected frame directly */
1957 struct iovec iov[2] = {
1959 .iov_base = &rtap_hdr,
1960 .iov_len = sizeof(rtap_hdr),
1963 .iov_base = (void *) data,
1967 struct msghdr msg = {
1972 .msg_control = NULL,
1973 .msg_controllen = 0,
1978 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1980 return sendmsg(drv->monitor_sock, &msg, 0);
1984 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1987 struct wpa_driver_nl80211_data *drv = priv;
1988 struct ieee80211_mgmt *mgmt;
1989 int do_not_encrypt = 0;
1992 mgmt = (struct ieee80211_mgmt *) data;
1993 fc = le_to_host16(mgmt->frame_control);
1995 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
1996 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
1998 * Only one of the authentication frame types is encrypted.
1999 * In order for static WEP encryption to work properly (i.e.,
2000 * to not encrypt the frame), we need to tell mac80211 about
2001 * the frames that must not be encrypted.
2003 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2004 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2005 if (auth_alg == WLAN_AUTH_OPEN ||
2006 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2010 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2015 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2016 const u8 *head, size_t head_len,
2017 const u8 *tail, size_t tail_len,
2020 struct wpa_driver_nl80211_data *drv = priv;
2022 u8 cmd = NL80211_CMD_NEW_BEACON;
2026 struct i802_bss *bss;
2028 bss = get_bss(drv, ifindex);
2031 beacon_set = bss->beacon_set;
2033 beacon_set = drv->beacon_set;
2034 #endif /* HOSTAPD */
2036 msg = nlmsg_alloc();
2040 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2043 cmd = NL80211_CMD_SET_BEACON;
2045 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2047 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2048 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2049 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2050 if (!drv->beacon_int)
2051 drv->beacon_int = 100;
2052 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2053 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2055 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2057 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2058 ret, strerror(-ret));
2061 bss->beacon_set = 1;
2063 drv->beacon_set = 1;
2064 #endif /* HOSTAPD */
2072 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2074 struct wpa_driver_nl80211_data *drv = priv;
2077 drv->beacon_int = value;
2080 if (!drv->bss.beacon_set)
2083 if (!drv->beacon_set)
2085 #endif /* HOSTAPD */
2087 msg = nlmsg_alloc();
2091 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2092 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2093 0, NL80211_CMD_SET_BEACON, 0);
2094 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2096 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2098 return send_and_recv_msgs(drv, msg, NULL, NULL);
2104 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2105 int freq, int ht_enabled,
2106 int sec_channel_offset)
2111 msg = nlmsg_alloc();
2115 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2116 NL80211_CMD_SET_WIPHY, 0);
2118 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2119 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2121 switch (sec_channel_offset) {
2123 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2124 NL80211_CHAN_HT40MINUS);
2127 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2128 NL80211_CHAN_HT40PLUS);
2131 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2137 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2140 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2141 "%d (%s)", freq, ret, strerror(-ret));
2146 #endif /* CONFIG_AP || HOSTAPD */
2151 static int wpa_driver_nl80211_set_beacon(void *priv,
2152 const u8 *head, size_t head_len,
2153 const u8 *tail, size_t tail_len,
2156 struct wpa_driver_nl80211_data *drv = priv;
2157 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2163 #endif /* CONFIG_AP */
2165 #if defined(CONFIG_AP) || defined(HOSTAPD)
2167 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2173 /* stop listening for EAPOL on this interface */
2174 del_ifidx(drv, ifidx);
2175 #endif /* HOSTAPD */
2177 msg = nlmsg_alloc();
2179 goto nla_put_failure;
2181 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2182 0, NL80211_CMD_DEL_INTERFACE, 0);
2183 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2185 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2188 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2193 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2194 const char *ifname, enum nl80211_iftype iftype,
2197 struct nl_msg *msg, *flags = NULL;
2203 #endif /* HOSTAPD */
2205 msg = nlmsg_alloc();
2209 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2210 0, NL80211_CMD_NEW_INTERFACE, 0);
2211 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2212 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2213 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2215 if (iftype == NL80211_IFTYPE_MONITOR) {
2218 flags = nlmsg_alloc();
2220 goto nla_put_failure;
2222 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2224 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2229 goto nla_put_failure;
2232 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2235 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2240 ifidx = if_nametoindex(ifname);
2246 /* start listening for EAPOL on this interface */
2247 add_ifidx(drv, ifidx);
2251 case NL80211_IFTYPE_AP:
2252 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2253 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2254 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2256 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2257 nl80211_remove_iface(drv, ifidx);
2261 case NL80211_IFTYPE_WDS:
2262 memset(&iwr, 0, sizeof(iwr));
2263 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2264 iwr.u.addr.sa_family = ARPHRD_ETHER;
2265 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2266 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2274 #endif /* HOSTAPD */
2279 #endif /* CONFIG_AP || HOSTAPD */
2283 void ap_tx_status(void *ctx, const u8 *addr,
2284 const u8 *buf, size_t len, int ack);
2285 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2286 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2287 struct hostapd_frame_info *fi);
2288 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2290 #endif /* CONFIG_AP */
2292 #if defined(CONFIG_AP) || defined(HOSTAPD)
2294 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2296 struct ieee80211_hdr *hdr;
2297 u16 fc, type, stype;
2299 hdr = (struct ieee80211_hdr *) buf;
2300 fc = le_to_host16(hdr->frame_control);
2302 type = WLAN_FC_GET_TYPE(fc);
2303 stype = WLAN_FC_GET_STYPE(fc);
2306 case WLAN_FC_TYPE_MGMT:
2307 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2308 ok ? "ACK" : "fail");
2310 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2312 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2313 #endif /* HOSTAPD */
2315 case WLAN_FC_TYPE_CTRL:
2316 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2317 ok ? "ACK" : "fail");
2319 case WLAN_FC_TYPE_DATA:
2321 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2323 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2324 #endif /* HOSTAPD */
2327 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2333 #endif /* CONFIG_AP || HOSTAPD */
2337 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2338 u8 *buf, size_t len,
2339 struct hostapd_frame_info *hfi,
2340 enum ieee80211_msg_type msg_type)
2342 struct ieee80211_hdr *hdr;
2343 u16 fc, type, stype;
2344 size_t data_len = len;
2347 * PS-Poll frames are 16 bytes. All other frames are
2348 * 24 bytes or longer.
2353 hdr = (struct ieee80211_hdr *) buf;
2354 fc = le_to_host16(hdr->frame_control);
2356 type = WLAN_FC_GET_TYPE(fc);
2357 stype = WLAN_FC_GET_STYPE(fc);
2360 case WLAN_FC_TYPE_DATA:
2363 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2366 case WLAN_FC_FROMDS:
2373 case WLAN_FC_TYPE_CTRL:
2374 /* discard non-ps-poll frames */
2375 if (stype != WLAN_FC_STYPE_PSPOLL)
2378 case WLAN_FC_TYPE_MGMT:
2386 case ieee80211_msg_normal:
2387 /* continue processing */
2389 case ieee80211_msg_tx_callback_ack:
2390 handle_tx_callback(drv->ctx, buf, data_len, 1);
2392 case ieee80211_msg_tx_callback_fail:
2393 handle_tx_callback(drv->ctx, buf, data_len, 0);
2398 case WLAN_FC_TYPE_MGMT:
2399 if (stype != WLAN_FC_STYPE_BEACON &&
2400 stype != WLAN_FC_STYPE_PROBE_REQ)
2401 wpa_printf(MSG_MSGDUMP, "MGMT");
2402 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2404 case WLAN_FC_TYPE_CTRL:
2405 /* can only get here with PS-Poll frames */
2406 wpa_printf(MSG_DEBUG, "CTRL");
2407 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2409 case WLAN_FC_TYPE_DATA:
2410 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2415 #endif /* CONFIG_AP */
2417 #if defined(CONFIG_AP) || defined(HOSTAPD)
2419 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2421 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2423 unsigned char buf[3000];
2424 struct ieee80211_radiotap_iterator iter;
2426 struct hostapd_frame_info hfi;
2427 int injected = 0, failed = 0, msg_type, rxflags = 0;
2429 len = recv(sock, buf, sizeof(buf), 0);
2435 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2436 printf("received invalid radiotap frame\n");
2440 memset(&hfi, 0, sizeof(hfi));
2443 ret = ieee80211_radiotap_iterator_next(&iter);
2447 printf("received invalid radiotap frame (%d)\n", ret);
2450 switch (iter.this_arg_index) {
2451 case IEEE80211_RADIOTAP_FLAGS:
2452 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2455 case IEEE80211_RADIOTAP_RX_FLAGS:
2458 case IEEE80211_RADIOTAP_TX_FLAGS:
2460 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2461 IEEE80211_RADIOTAP_F_TX_FAIL;
2463 case IEEE80211_RADIOTAP_DATA_RETRIES:
2465 case IEEE80211_RADIOTAP_CHANNEL:
2466 /* TODO convert from freq/flags to channel number
2471 case IEEE80211_RADIOTAP_RATE:
2472 hfi.datarate = *iter.this_arg * 5;
2474 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2475 hfi.ssi_signal = *iter.this_arg;
2480 if (rxflags && injected)
2484 msg_type = ieee80211_msg_normal;
2486 msg_type = ieee80211_msg_tx_callback_fail;
2488 msg_type = ieee80211_msg_tx_callback_ack;
2490 handle_frame(drv, buf + iter.max_length,
2491 len - iter.max_length, &hfi, msg_type);
2496 * we post-process the filter code later and rewrite
2497 * this to the offset to the last instruction
2502 static struct sock_filter msock_filter_insns[] = {
2504 * do a little-endian load of the radiotap length field
2506 /* load lower byte into A */
2507 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2508 /* put it into X (== index register) */
2509 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2510 /* load upper byte into A */
2511 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2512 /* left-shift it by 8 */
2513 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2515 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2516 /* put result into X */
2517 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2520 * Allow management frames through, this also gives us those
2521 * management frames that we sent ourselves with status
2523 /* load the lower byte of the IEEE 802.11 frame control field */
2524 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2525 /* mask off frame type and version */
2526 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2527 /* accept frame if it's both 0, fall through otherwise */
2528 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2531 * TODO: add a bit to radiotap RX flags that indicates
2532 * that the sending station is not associated, then
2533 * add a filter here that filters on our DA and that flag
2534 * to allow us to deauth frames to that bad station.
2536 * Not a regression -- we didn't do it before either.
2541 * drop non-data frames, WDS frames
2543 /* load the lower byte of the frame control field */
2544 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2545 /* mask off QoS bit */
2546 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2547 /* drop non-data frames */
2548 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2549 /* load the upper byte of the frame control field */
2550 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2551 /* mask off toDS/fromDS */
2552 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2553 /* drop WDS frames */
2554 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2558 * add header length to index
2560 /* load the lower byte of the frame control field */
2561 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2562 /* mask off QoS bit */
2563 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2564 /* right shift it by 6 to give 0 or 2 */
2565 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2566 /* add data frame header length */
2567 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2568 /* add index, was start of 802.11 header */
2569 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2570 /* move to index, now start of LL header */
2571 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2574 * Accept empty data frames, we use those for
2577 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2578 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2581 * Accept EAPOL frames
2583 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2584 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2585 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2586 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2588 /* keep these last two statements or change the code below */
2589 /* return 0 == "DROP" */
2590 BPF_STMT(BPF_RET | BPF_K, 0),
2591 /* return ~0 == "keep all" */
2592 BPF_STMT(BPF_RET | BPF_K, ~0),
2595 static struct sock_fprog msock_filter = {
2596 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2597 .filter = msock_filter_insns,
2601 static int add_monitor_filter(int s)
2605 /* rewrite all PASS/FAIL jump offsets */
2606 for (idx = 0; idx < msock_filter.len; idx++) {
2607 struct sock_filter *insn = &msock_filter_insns[idx];
2609 if (BPF_CLASS(insn->code) == BPF_JMP) {
2610 if (insn->code == (BPF_JMP|BPF_JA)) {
2611 if (insn->k == PASS)
2612 insn->k = msock_filter.len - idx - 2;
2613 else if (insn->k == FAIL)
2614 insn->k = msock_filter.len - idx - 3;
2617 if (insn->jt == PASS)
2618 insn->jt = msock_filter.len - idx - 2;
2619 else if (insn->jt == FAIL)
2620 insn->jt = msock_filter.len - idx - 3;
2622 if (insn->jf == PASS)
2623 insn->jf = msock_filter.len - idx - 2;
2624 else if (insn->jf == FAIL)
2625 insn->jf = msock_filter.len - idx - 3;
2629 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2630 &msock_filter, sizeof(msock_filter))) {
2631 perror("SO_ATTACH_FILTER");
2640 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2643 struct sockaddr_ll ll;
2647 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2648 buf[IFNAMSIZ - 1] = '\0';
2650 drv->monitor_ifidx =
2651 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2653 if (drv->monitor_ifidx < 0)
2656 if (hostapd_set_iface_flags(drv, buf, 1))
2659 memset(&ll, 0, sizeof(ll));
2660 ll.sll_family = AF_PACKET;
2661 ll.sll_ifindex = drv->monitor_ifidx;
2662 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2663 if (drv->monitor_sock < 0) {
2664 perror("socket[PF_PACKET,SOCK_RAW]");
2668 if (add_monitor_filter(drv->monitor_sock)) {
2669 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2670 "interface; do filtering in user space");
2671 /* This works, but will cost in performance. */
2674 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2675 perror("monitor socket bind");
2679 optlen = sizeof(optval);
2682 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2683 perror("Failed to set socket priority");
2687 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2689 printf("Could not register monitor read socket\n");
2695 nl80211_remove_iface(drv, drv->monitor_ifidx);
2699 #endif /* CONFIG_AP || HOSTAPD */
2703 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2704 struct wpa_driver_associate_params *params)
2706 if (drv->monitor_ifidx < 0 &&
2707 nl80211_create_monitor_interface(drv))
2710 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2711 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2712 nl80211_remove_iface(drv, drv->monitor_ifidx);
2713 drv->monitor_ifidx = -1;
2717 /* TODO: setup monitor interface (and add code somewhere to remove this
2718 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2722 #endif /* CONFIG_AP */
2725 static int wpa_driver_nl80211_associate(
2726 void *priv, struct wpa_driver_associate_params *params)
2728 struct wpa_driver_nl80211_data *drv = priv;
2733 if (params->mode == 2)
2734 return wpa_driver_nl80211_ap(drv, params);
2735 #endif /* CONFIG_AP */
2737 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2738 params->drop_unencrypted);
2740 drv->associated = 0;
2742 msg = nlmsg_alloc();
2746 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2748 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2749 NL80211_CMD_ASSOCIATE, 0);
2751 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2752 if (params->bssid) {
2753 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2754 MAC2STR(params->bssid));
2755 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2758 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2759 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2762 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2763 params->ssid, params->ssid_len);
2764 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2766 if (params->ssid_len > sizeof(drv->ssid))
2767 goto nla_put_failure;
2768 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2769 drv->ssid_len = params->ssid_len;
2771 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2773 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2776 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2779 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2780 "(%s)", ret, strerror(-ret));
2781 goto nla_put_failure;
2784 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2794 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2795 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2796 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2797 * Returns: 0 on success, -1 on failure
2799 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2808 nlmode = NL80211_IFTYPE_STATION;
2811 nlmode = NL80211_IFTYPE_ADHOC;
2814 nlmode = NL80211_IFTYPE_AP;
2820 msg = nlmsg_alloc();
2824 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2825 0, NL80211_CMD_SET_INTERFACE, 0);
2826 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2827 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2829 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2836 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2837 ret, strerror(-ret));
2841 /* mac80211 doesn't allow mode changes while the device is up, so
2842 * take the device down, try to set the mode again, and bring the
2845 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2846 /* Try to set the mode again while the interface is down */
2847 msg = nlmsg_alloc();
2851 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2852 0, NL80211_CMD_SET_INTERFACE, 0);
2853 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2854 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2855 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2857 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2858 "mode(try_again): %d (%s)",
2859 drv->ifname, ret, strerror(-ret));
2862 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2870 static int wpa_driver_nl80211_get_capa(void *priv,
2871 struct wpa_driver_capa *capa)
2873 struct wpa_driver_nl80211_data *drv = priv;
2874 if (!drv->has_capability)
2876 os_memcpy(capa, &drv->capa, sizeof(*capa));
2881 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2883 struct wpa_driver_nl80211_data *drv = priv;
2885 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2886 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2887 drv->operstate = state;
2888 return wpa_driver_nl80211_send_oper_ifla(
2889 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2895 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2897 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2898 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2901 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2904 struct i802_bss *bss = &drv->bss;
2906 if (ifindex == bss->ifindex)
2910 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2915 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2920 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2922 for (i = 0; i < drv->num_if_indices; i++) {
2923 if (drv->if_indices[i] == 0) {
2924 drv->if_indices[i] = ifidx;
2929 if (drv->if_indices != drv->default_if_indices)
2930 old = drv->if_indices;
2934 drv->if_indices = realloc(old,
2935 sizeof(int) * (drv->num_if_indices + 1));
2936 if (!drv->if_indices) {
2938 drv->if_indices = drv->default_if_indices;
2940 drv->if_indices = old;
2941 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2943 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2946 drv->if_indices[drv->num_if_indices] = ifidx;
2947 drv->num_if_indices++;
2951 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2955 for (i = 0; i < drv->num_if_indices; i++) {
2956 if (drv->if_indices[i] == ifidx) {
2957 drv->if_indices[i] = 0;
2964 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2968 for (i = 0; i < drv->num_if_indices; i++)
2969 if (drv->if_indices[i] == ifidx)
2976 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2977 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2978 size_t seq_len, const u8 *key, size_t key_len)
2980 struct wpa_driver_nl80211_data *drv = priv;
2981 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2982 set_tx, seq, seq_len, key, key_len);
2986 static inline int min_int(int a, int b)
2994 static int get_key_handler(struct nl_msg *msg, void *arg)
2996 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2997 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2999 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3000 genlmsg_attrlen(gnlh, 0), NULL);
3003 * TODO: validate the key index and mac address!
3004 * Otherwise, there's a race condition as soon as
3005 * the kernel starts sending key notifications.
3008 if (tb[NL80211_ATTR_KEY_SEQ])
3009 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3010 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3015 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3018 struct wpa_driver_nl80211_data *drv = priv;
3021 msg = nlmsg_alloc();
3025 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3026 0, NL80211_CMD_GET_KEY, 0);
3029 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3030 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3031 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3035 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3041 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3044 struct wpa_driver_nl80211_data *drv = priv;
3046 u8 rates[NL80211_MAX_SUPP_RATES];
3050 msg = nlmsg_alloc();
3054 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3055 NL80211_CMD_SET_BSS, 0);
3057 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3058 rates[rates_len++] = basic_rates[i] / 5;
3060 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3062 /* TODO: multi-BSS support */
3063 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3065 return send_and_recv_msgs(drv, msg, NULL, NULL);
3071 /* Set kernel driver on given frequency (MHz) */
3072 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3074 struct wpa_driver_nl80211_data *drv = priv;
3075 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3076 freq->sec_channel_offset);
3080 static int i802_set_rts(void *priv, int rts)
3082 struct wpa_driver_nl80211_data *drv = priv;
3085 memset(&iwr, 0, sizeof(iwr));
3086 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3087 iwr.u.rts.value = rts;
3088 iwr.u.rts.fixed = 1;
3090 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3091 perror("ioctl[SIOCSIWRTS]");
3099 static int i802_set_frag(void *priv, int frag)
3101 struct wpa_driver_nl80211_data *drv = priv;
3104 memset(&iwr, 0, sizeof(iwr));
3105 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3106 iwr.u.frag.value = frag;
3107 iwr.u.frag.fixed = 1;
3109 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3110 perror("ioctl[SIOCSIWFRAG]");
3118 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3120 struct wpa_driver_nl80211_data *drv = priv;
3123 memset(&iwr, 0, sizeof(iwr));
3124 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3126 iwr.u.retry.value = short_retry;
3127 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3128 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3129 perror("ioctl[SIOCSIWRETRY(short)]");
3133 iwr.u.retry.value = long_retry;
3134 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3135 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3136 perror("ioctl[SIOCSIWRETRY(long)]");
3144 static int i802_flush(void *priv)
3146 struct wpa_driver_nl80211_data *drv = priv;
3149 msg = nlmsg_alloc();
3153 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3154 0, NL80211_CMD_DEL_STATION, 0);
3157 * XXX: FIX! this needs to flush all VLANs too
3159 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3160 if_nametoindex(drv->ifname));
3162 return send_and_recv_msgs(drv, msg, NULL, NULL);
3168 static int get_sta_handler(struct nl_msg *msg, void *arg)
3170 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3171 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3172 struct hostap_sta_driver_data *data = arg;
3173 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3174 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3175 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3176 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3177 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3178 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3179 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3182 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3183 genlmsg_attrlen(gnlh, 0), NULL);
3186 * TODO: validate the interface and mac address!
3187 * Otherwise, there's a race condition as soon as
3188 * the kernel starts sending station notifications.
3191 if (!tb[NL80211_ATTR_STA_INFO]) {
3192 wpa_printf(MSG_DEBUG, "sta stats missing!");
3195 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3196 tb[NL80211_ATTR_STA_INFO],
3198 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3202 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3203 data->inactive_msec =
3204 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3205 if (stats[NL80211_STA_INFO_RX_BYTES])
3206 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3207 if (stats[NL80211_STA_INFO_TX_BYTES])
3208 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3209 if (stats[NL80211_STA_INFO_RX_PACKETS])
3211 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3212 if (stats[NL80211_STA_INFO_TX_PACKETS])
3214 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3219 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3222 struct wpa_driver_nl80211_data *drv = priv;
3225 os_memset(data, 0, sizeof(*data));
3226 msg = nlmsg_alloc();
3230 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3231 0, NL80211_CMD_GET_STATION, 0);
3233 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3234 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3236 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3242 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3243 size_t data_len, int encrypt, const u8 *own_addr)
3245 struct wpa_driver_nl80211_data *drv = priv;
3246 struct ieee80211_hdr *hdr;
3251 int qos = sta->flags & WLAN_STA_WME;
3256 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3258 hdr = os_zalloc(len);
3260 printf("malloc() failed for i802_send_data(len=%lu)\n",
3261 (unsigned long) len);
3265 hdr->frame_control =
3266 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3267 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3269 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3270 #if 0 /* To be enabled if qos determination is added above */
3272 hdr->frame_control |=
3273 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3277 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3278 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3279 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3280 pos = (u8 *) (hdr + 1);
3282 #if 0 /* To be enabled if qos determination is added above */
3284 /* add an empty QoS header if needed */
3291 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3292 pos += sizeof(rfc1042_header);
3293 WPA_PUT_BE16(pos, ETH_P_PAE);
3295 memcpy(pos, data, data_len);
3297 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3299 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3301 (unsigned long) len, errno, strerror(errno));
3309 static int i802_sta_add(const char *ifname, void *priv,
3310 struct hostapd_sta_add_params *params)
3312 struct wpa_driver_nl80211_data *drv = priv;
3316 msg = nlmsg_alloc();
3320 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3321 0, NL80211_CMD_NEW_STATION, 0);
3323 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3324 if_nametoindex(drv->ifname));
3325 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3326 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3327 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3328 params->supp_rates);
3329 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3330 params->listen_interval);
3332 #ifdef CONFIG_IEEE80211N
3333 if (params->ht_capabilities) {
3334 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3335 params->ht_capabilities->length,
3336 ¶ms->ht_capabilities->data);
3338 #endif /* CONFIG_IEEE80211N */
3340 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3342 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3343 "result: %d (%s)", ret, strerror(-ret));
3351 static int i802_sta_remove(void *priv, const u8 *addr)
3353 struct wpa_driver_nl80211_data *drv = priv;
3357 msg = nlmsg_alloc();
3361 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3362 0, NL80211_CMD_DEL_STATION, 0);
3364 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3365 if_nametoindex(drv->ifname));
3366 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3368 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3377 static int i802_sta_set_flags(void *priv, const u8 *addr,
3378 int total_flags, int flags_or, int flags_and)
3380 struct wpa_driver_nl80211_data *drv = priv;
3381 struct nl_msg *msg, *flags = NULL;
3383 msg = nlmsg_alloc();
3387 flags = nlmsg_alloc();
3393 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3394 0, NL80211_CMD_SET_STATION, 0);
3396 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3397 if_nametoindex(drv->ifname));
3398 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3400 if (total_flags & WLAN_STA_AUTHORIZED)
3401 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3403 if (total_flags & WLAN_STA_WMM)
3404 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3406 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3407 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3409 if (total_flags & WLAN_STA_MFP)
3410 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3412 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3413 goto nla_put_failure;
3417 return send_and_recv_msgs(drv, msg, NULL, NULL);
3424 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3425 int cw_min, int cw_max, int burst_time)
3427 struct wpa_driver_nl80211_data *drv = priv;
3429 struct nlattr *txq, *params;
3431 msg = nlmsg_alloc();
3435 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3436 0, NL80211_CMD_SET_WIPHY, 0);
3438 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3440 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3442 goto nla_put_failure;
3444 /* We are only sending parameters for a single TXQ at a time */
3445 params = nla_nest_start(msg, 1);
3447 goto nla_put_failure;
3449 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3450 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3451 * 32 usec, so need to convert the value here. */
3452 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3453 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3454 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3455 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3457 nla_nest_end(msg, params);
3459 nla_nest_end(msg, txq);
3461 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3468 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3470 struct wpa_driver_nl80211_data *drv = priv;
3472 struct i802_bss *bss;
3474 bss = os_zalloc(sizeof(*bss));
3477 bss->ifindex = if_nametoindex(ifname);
3479 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3484 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3485 nl80211_remove_iface(priv, ifidx);
3489 bss->next = drv->bss.next;
3490 drv->bss.next = bss;
3495 static int i802_bss_remove(void *priv, const char *ifname)
3497 struct wpa_driver_nl80211_data *drv = priv;
3498 struct i802_bss *bss, *prev;
3499 int ifindex = if_nametoindex(ifname);
3500 nl80211_remove_iface(priv, ifindex);
3502 bss = drv->bss.next;
3504 if (ifindex == bss->ifindex) {
3505 prev->next = bss->next;
3516 static int i802_set_beacon(const char *iface, void *priv,
3517 const u8 *head, size_t head_len,
3518 const u8 *tail, size_t tail_len, int dtim_period)
3520 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3527 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3531 msg = nlmsg_alloc();
3535 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3536 0, NL80211_CMD_DEL_BEACON, 0);
3537 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3539 return send_and_recv_msgs(drv, msg, NULL, NULL);
3545 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3547 struct wpa_driver_nl80211_data *drv = priv;
3550 msg = nlmsg_alloc();
3554 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3555 NL80211_CMD_SET_BSS, 0);
3558 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3560 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3562 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3564 /* TODO: multi-BSS support */
3565 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3567 return send_and_recv_msgs(drv, msg, NULL, NULL);
3573 static int i802_set_cts_protect(void *priv, int value)
3575 return i802_set_bss(priv, value, -1, -1);
3579 static int i802_set_preamble(void *priv, int value)
3581 return i802_set_bss(priv, -1, value, -1);
3585 static int i802_set_short_slot_time(void *priv, int value)
3587 return i802_set_bss(priv, -1, -1, value);
3591 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3594 case HOSTAPD_IF_VLAN:
3595 return NL80211_IFTYPE_AP_VLAN;
3596 case HOSTAPD_IF_WDS:
3597 return NL80211_IFTYPE_WDS;
3603 static int i802_if_add(const char *iface, void *priv,
3604 enum hostapd_driver_if_type type, char *ifname,
3607 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3613 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3614 char *ifname, const u8 *addr)
3616 /* unused at the moment */
3621 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3622 const char *ifname, const u8 *addr)
3624 nl80211_remove_iface(priv, if_nametoindex(ifname));
3629 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3630 const char *ifname, int vlan_id)
3632 struct wpa_driver_nl80211_data *drv = priv;
3635 msg = nlmsg_alloc();
3639 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3640 0, NL80211_CMD_SET_STATION, 0);
3642 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3643 if_nametoindex(drv->ifname));
3644 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3645 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3646 if_nametoindex(ifname));
3648 return send_and_recv_msgs(drv, msg, NULL, NULL);
3654 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3655 u8 *buf, size_t len,
3656 struct hostapd_frame_info *hfi,
3657 enum ieee80211_msg_type msg_type)
3659 struct hostapd_iface *iface = drv->hapd->iface;
3660 struct ieee80211_hdr *hdr;
3661 u16 fc, type, stype;
3662 size_t data_len = len;
3663 struct hostapd_data *hapd = NULL;
3664 int broadcast_bssid = 0;
3669 * PS-Poll frames are 16 bytes. All other frames are
3670 * 24 bytes or longer.
3675 hdr = (struct ieee80211_hdr *) buf;
3676 fc = le_to_host16(hdr->frame_control);
3678 type = WLAN_FC_GET_TYPE(fc);
3679 stype = WLAN_FC_GET_STYPE(fc);
3682 case WLAN_FC_TYPE_DATA:
3685 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3689 case WLAN_FC_FROMDS:
3697 case WLAN_FC_TYPE_CTRL:
3698 /* discard non-ps-poll frames */
3699 if (stype != WLAN_FC_STYPE_PSPOLL)
3703 case WLAN_FC_TYPE_MGMT:
3711 /* find interface frame belongs to */
3712 for (i = 0; i < iface->num_bss; i++) {
3713 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3714 hapd = iface->bss[i];
3720 hapd = iface->bss[0];
3722 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3723 bssid[2] != 0xff || bssid[3] != 0xff ||
3724 bssid[4] != 0xff || bssid[5] != 0xff) {
3726 * Unknown BSSID - drop frame if this is not from
3727 * passive scanning or a beacon (at least ProbeReq
3728 * frames to other APs may be allowed through RX
3729 * filtering in the wlan hw/driver)
3731 if ((type != WLAN_FC_TYPE_MGMT ||
3732 stype != WLAN_FC_STYPE_BEACON))
3735 broadcast_bssid = 1;
3739 case ieee80211_msg_normal:
3740 /* continue processing */
3742 case ieee80211_msg_tx_callback_ack:
3743 handle_tx_callback(hapd, buf, data_len, 1);
3745 case ieee80211_msg_tx_callback_fail:
3746 handle_tx_callback(hapd, buf, data_len, 0);
3751 case WLAN_FC_TYPE_MGMT:
3752 if (stype != WLAN_FC_STYPE_BEACON &&
3753 stype != WLAN_FC_STYPE_PROBE_REQ)
3754 wpa_printf(MSG_MSGDUMP, "MGMT");
3755 if (broadcast_bssid) {
3756 for (i = 0; i < iface->num_bss; i++)
3757 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3760 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3762 case WLAN_FC_TYPE_CTRL:
3763 /* can only get here with PS-Poll frames */
3764 wpa_printf(MSG_DEBUG, "CTRL");
3765 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3767 case WLAN_FC_TYPE_DATA:
3768 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3774 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3776 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3777 struct sockaddr_ll lladdr;
3778 unsigned char buf[3000];
3780 socklen_t fromlen = sizeof(lladdr);
3782 len = recvfrom(sock, buf, sizeof(buf), 0,
3783 (struct sockaddr *)&lladdr, &fromlen);
3789 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3790 struct hostapd_data *hapd;
3791 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3794 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3799 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3805 msg = nlmsg_alloc();
3809 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3810 0, NL80211_CMD_SET_INTERFACE, 0);
3811 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3812 if_nametoindex(ifname));
3813 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3815 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3819 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3825 #ifdef CONFIG_IEEE80211N
3826 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3827 int freq, u8 *ie, size_t ie_len)
3829 struct ieee802_11_elems elems;
3830 int ht, pri_chan = 0, sec_chan = 0;
3831 struct ieee80211_ht_operation *oper;
3832 struct hostapd_neighbor_bss *nnei;
3834 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3835 ht = elems.ht_capabilities || elems.ht_operation;
3836 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3837 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3838 pri_chan = oper->control_chan;
3839 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3840 if (oper->ht_param &
3841 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3842 sec_chan = pri_chan + 4;
3843 else if (oper->ht_param &
3844 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3845 sec_chan = pri_chan - 4;
3849 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3850 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3851 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3853 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3854 sizeof(struct hostapd_neighbor_bss));
3857 drv->neighbors = nnei;
3858 nnei = &nnei[drv->num_neighbors];
3859 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3862 nnei->pri_chan = pri_chan;
3863 nnei->sec_chan = sec_chan;
3864 drv->num_neighbors++;
3868 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3870 int divi = 1000000, i;
3872 if (iwe->u.freq.e == 0) {
3874 * Some drivers do not report frequency, but a channel.
3875 * Try to map this to frequency by assuming they are using
3876 * IEEE 802.11b/g. But don't overwrite a previously parsed
3877 * frequency if the driver sends both frequency and channel,
3878 * since the driver may be sending an A-band channel that we
3879 * don't handle here.
3885 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3886 *freq = 2407 + 5 * iwe->u.freq.m;
3888 } else if (iwe->u.freq.m == 14) {
3894 if (iwe->u.freq.e > 6) {
3895 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3896 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3900 for (i = 0; i < iwe->u.freq.e; i++)
3902 *freq = iwe->u.freq.m / divi;
3907 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3912 struct iw_event iwe_buf, *iwe = &iwe_buf;
3913 char *pos, *end, *custom;
3922 pos = (char *) res_buf;
3923 end = (char *) res_buf + len;
3925 while (pos + IW_EV_LCP_LEN <= end) {
3926 /* Event data may be unaligned, so make a local, aligned copy
3927 * before processing. */
3928 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3929 if (iwe->len <= IW_EV_LCP_LEN)
3932 custom = pos + IW_EV_POINT_LEN;
3933 if (iwe->cmd == IWEVGENIE) {
3934 /* WE-19 removed the pointer from struct iw_point */
3935 char *dpos = (char *) &iwe_buf.u.data.length;
3936 int dlen = dpos - (char *) &iwe_buf;
3937 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3938 sizeof(struct iw_event) - dlen);
3940 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3941 custom += IW_EV_POINT_OFF;
3947 i802_add_neighbor(drv, bssid, freq, ie,
3950 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3956 i802_get_scan_freq(iwe, &freq);
3959 if (custom + iwe->u.data.length > end) {
3960 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3964 ie_len = iwe->u.data.length;
3972 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3978 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
3985 res_buf_len = IW_SCAN_MAX_DATA;
3987 res_buf = os_malloc(res_buf_len);
3988 if (res_buf == NULL)
3990 os_memset(&iwr, 0, sizeof(iwr));
3991 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3992 iwr.u.data.pointer = res_buf;
3993 iwr.u.data.length = res_buf_len;
3995 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
3998 if (errno == E2BIG && res_buf_len < 65535) {
4002 if (res_buf_len > 65535)
4003 res_buf_len = 65535; /* 16-bit length field */
4004 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4005 "trying larger buffer (%lu bytes)",
4006 (unsigned long) res_buf_len);
4008 perror("ioctl[SIOCGIWSCAN]");
4014 if (iwr.u.data.length > res_buf_len) {
4019 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4026 static int i802_is_event_wireless_scan_complete(char *data, int len)
4028 struct iw_event iwe_buf, *iwe = &iwe_buf;
4034 while (pos + IW_EV_LCP_LEN <= end) {
4035 /* Event data may be unaligned, so make a local, aligned copy
4036 * before processing. */
4037 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4038 if (iwe->cmd == SIOCGIWSCAN)
4048 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4050 struct ifinfomsg *ifi;
4051 int attrlen, _nlmsg_len, rta_len;
4052 struct rtattr *attr;
4054 if (len < (int) sizeof(*ifi))
4057 ifi = NLMSG_DATA(h);
4059 if (ifindex != ifi->ifi_index)
4060 return 0; /* event for foreign ifindex */
4062 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4064 attrlen = h->nlmsg_len - _nlmsg_len;
4068 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4070 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4071 while (RTA_OK(attr, attrlen)) {
4072 if (attr->rta_type == IFLA_WIRELESS &&
4073 i802_is_event_wireless_scan_complete(
4074 ((char *) attr) + rta_len,
4075 attr->rta_len - rta_len))
4077 attr = RTA_NEXT(attr, attrlen);
4084 static int i802_is_scan_complete(int s, int ifindex)
4090 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4092 perror("recv(netlink)");
4096 h = (struct nlmsghdr *) buf;
4097 while (left >= (int) sizeof(*h)) {
4101 plen = len - sizeof(*h);
4102 if (len > left || plen < 0) {
4103 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4104 "len=%d left=%d plen=%d",
4109 switch (h->nlmsg_type) {
4111 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4116 len = NLMSG_ALIGN(len);
4118 h = (struct nlmsghdr *) ((char *) h + len);
4125 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4128 int s, res, ifindex;
4129 struct sockaddr_nl local;
4134 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4135 "starting HT 20/40 MHz BSS");
4137 /* Request a new scan */
4138 /* TODO: would be enough to scan the selected band */
4139 os_memset(&iwr, 0, sizeof(iwr));
4140 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4141 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4142 perror("ioctl[SIOCSIWSCAN]");
4146 ifindex = if_nametoindex(drv->ifname);
4148 /* Wait for scan completion event or timeout */
4149 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4151 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4155 os_memset(&local, 0, sizeof(local));
4156 local.nl_family = AF_NETLINK;
4157 local.nl_groups = RTMGRP_LINK;
4158 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4159 perror("bind(netlink)");
4165 end += 30; /* Wait at most 30 seconds for scan results */
4168 tv.tv_sec = end > now ? end - now : 0;
4172 res = select(s + 1, &rfds, NULL, NULL, &tv);
4175 /* Assume results are ready after 10 seconds wait */
4179 if (i802_is_scan_complete(s, ifindex)) {
4180 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4185 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4186 /* Assume results are ready to be read now */
4193 return i802_get_ht_scan_res(drv);
4195 #endif /* CONFIG_IEEE80211N */
4198 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4203 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4204 if (drv->ioctl_sock < 0) {
4205 perror("socket[PF_INET,SOCK_DGRAM]");
4209 /* start listening for EAPOL on the default AP interface */
4210 add_ifidx(drv, if_nametoindex(drv->ifname));
4212 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4216 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4217 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4218 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4220 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4221 perror("ioctl(SIOCSIFHWADDR)");
4227 * initialise generic netlink and nl80211
4229 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4231 printf("Failed to allocate netlink callbacks.\n");
4235 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4236 if (!drv->nl_handle) {
4237 printf("Failed to allocate netlink handle.\n");
4241 if (genl_connect(drv->nl_handle)) {
4242 printf("Failed to connect to generic netlink.\n");
4246 #ifdef CONFIG_LIBNL20
4247 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4248 printf("Failed to allocate generic netlink cache.\n");
4251 #else /* CONFIG_LIBNL20 */
4252 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4253 if (!drv->nl_cache) {
4254 printf("Failed to allocate generic netlink cache.\n");
4257 #endif /* CONFIG_LIBNL20 */
4259 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4260 if (!drv->nl80211) {
4261 printf("nl80211 not found.\n");
4265 ret = nl_get_multicast_id(drv, "nl80211", "scan");
4267 ret = nl_socket_add_membership(drv->nl_handle, ret);
4269 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4270 "membership for scan events: %d (%s)",
4271 ret, strerror(-ret));
4274 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4276 ret = nl_socket_add_membership(drv->nl_handle, ret);
4278 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4279 "membership for mlme events: %d (%s)",
4280 ret, strerror(-ret));
4283 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4284 wpa_driver_nl80211_event_receive, drv,
4287 #ifdef CONFIG_IEEE80211N
4288 if (drv->ht_40mhz_scan) {
4289 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4290 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4291 i802_ht_scan(drv) ||
4292 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4293 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4294 "HT 40 MHz operations");
4298 #endif /* CONFIG_IEEE80211N */
4300 /* Initialise a monitor interface */
4301 if (nl80211_create_monitor_interface(drv))
4304 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4307 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4310 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4311 if (drv->eapol_sock < 0) {
4312 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4316 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4318 printf("Could not register read socket for eapol\n");
4322 memset(&ifr, 0, sizeof(ifr));
4323 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4324 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4325 perror("ioctl(SIOCGIFHWADDR)");
4329 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4330 printf("Invalid HW-addr family 0x%04x\n",
4331 ifr.ifr_hwaddr.sa_family);
4334 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4339 nl80211_remove_iface(drv, drv->monitor_ifidx);
4344 static int i802_get_inact_sec(void *priv, const u8 *addr)
4346 struct hostap_sta_driver_data data;
4349 data.inactive_msec = (unsigned long) -1;
4350 ret = i802_read_sta_data(priv, &data, addr);
4351 if (ret || data.inactive_msec == (unsigned long) -1)
4353 return data.inactive_msec / 1000;
4357 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4366 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4368 struct wpa_driver_nl80211_data *drv = priv;
4369 struct ieee80211_mgmt mgmt;
4371 memset(&mgmt, 0, sizeof(mgmt));
4372 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4373 WLAN_FC_STYPE_DEAUTH);
4374 memcpy(mgmt.da, addr, ETH_ALEN);
4375 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4376 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4377 mgmt.u.deauth.reason_code = host_to_le16(reason);
4378 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4380 sizeof(mgmt.u.deauth));
4384 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4386 struct wpa_driver_nl80211_data *drv = priv;
4387 struct ieee80211_mgmt mgmt;
4389 memset(&mgmt, 0, sizeof(mgmt));
4390 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4391 WLAN_FC_STYPE_DISASSOC);
4392 memcpy(mgmt.da, addr, ETH_ALEN);
4393 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4394 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4395 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4396 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4398 sizeof(mgmt.u.disassoc));
4402 static const struct hostapd_neighbor_bss *
4403 i802_get_neighbor_bss(void *priv, size_t *num)
4405 struct wpa_driver_nl80211_data *drv = priv;
4406 *num = drv->num_neighbors;
4407 return drv->neighbors;
4411 static void *i802_init(struct hostapd_data *hapd,
4412 struct wpa_init_params *params)
4414 struct wpa_driver_nl80211_data *drv;
4417 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4419 printf("Could not allocate memory for i802 driver data\n");
4424 memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4425 drv->ifindex = if_nametoindex(drv->ifname);
4426 drv->bss.ifindex = drv->ifindex;
4428 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4429 drv->if_indices = drv->default_if_indices;
4430 for (i = 0; i < params->num_bridge; i++) {
4431 if (params->bridge[i])
4432 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4434 drv->ht_40mhz_scan = params->ht_40mhz_scan;
4436 if (i802_init_sockets(drv, params->bssid))
4447 static void i802_deinit(void *priv)
4449 struct wpa_driver_nl80211_data *drv = priv;
4450 struct i802_bss *bss, *prev;
4452 if (drv->last_freq_ht) {
4453 /* Clear HT flags from the driver */
4454 struct hostapd_freq_params freq;
4455 os_memset(&freq, 0, sizeof(freq));
4456 freq.freq = drv->last_freq;
4457 i802_set_freq(priv, &freq);
4460 i802_del_beacon(drv);
4462 /* remove monitor interface */
4463 nl80211_remove_iface(drv, drv->monitor_ifidx);
4465 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4467 if (drv->monitor_sock >= 0) {
4468 eloop_unregister_read_sock(drv->monitor_sock);
4469 close(drv->monitor_sock);
4471 if (drv->ioctl_sock >= 0)
4472 close(drv->ioctl_sock);
4473 if (drv->eapol_sock >= 0) {
4474 eloop_unregister_read_sock(drv->eapol_sock);
4475 close(drv->eapol_sock);
4478 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4479 genl_family_put(drv->nl80211);
4480 nl_cache_free(drv->nl_cache);
4481 nl_handle_destroy(drv->nl_handle);
4482 nl_cb_put(drv->nl_cb);
4484 if (drv->if_indices != drv->default_if_indices)
4485 free(drv->if_indices);
4487 os_free(drv->neighbors);
4489 bss = drv->bss.next;
4499 #endif /* HOSTAPD */
4502 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4504 .desc = "Linux nl80211/cfg80211",
4505 .get_bssid = wpa_driver_nl80211_get_bssid,
4506 .get_ssid = wpa_driver_nl80211_get_ssid,
4507 .set_key = wpa_driver_nl80211_set_key,
4508 .scan2 = wpa_driver_nl80211_scan,
4509 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4510 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4511 .disassociate = wpa_driver_nl80211_disassociate,
4512 .authenticate = wpa_driver_nl80211_authenticate,
4513 .associate = wpa_driver_nl80211_associate,
4514 .init = wpa_driver_nl80211_init,
4515 .deinit = wpa_driver_nl80211_deinit,
4516 .get_capa = wpa_driver_nl80211_get_capa,
4517 .set_operstate = wpa_driver_nl80211_set_operstate,
4518 .set_country = wpa_driver_nl80211_set_country,
4520 .set_beacon = wpa_driver_nl80211_set_beacon,
4521 #endif /* CONFIG_AP */
4522 #if defined(CONFIG_AP) || defined(HOSTAPD)
4523 .send_mlme = wpa_driver_nl80211_send_mlme,
4524 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4525 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4526 #endif /* CONFIG_AP || HOSTAPD */
4528 .hapd_init = i802_init,
4529 .hapd_deinit = i802_deinit,
4530 .hapd_set_key = i802_set_key,
4531 .get_seqnum = i802_get_seqnum,
4532 .flush = i802_flush,
4533 .read_sta_data = i802_read_sta_data,
4534 .hapd_send_eapol = i802_send_eapol,
4535 .sta_set_flags = i802_sta_set_flags,
4536 .sta_deauth = i802_sta_deauth,
4537 .sta_disassoc = i802_sta_disassoc,
4538 .sta_remove = i802_sta_remove,
4539 .sta_add = i802_sta_add,
4540 .get_inact_sec = i802_get_inact_sec,
4541 .sta_clear_stats = i802_sta_clear_stats,
4542 .set_freq = i802_set_freq,
4543 .set_rts = i802_set_rts,
4544 .set_frag = i802_set_frag,
4545 .set_retry = i802_set_retry,
4546 .set_rate_sets = i802_set_rate_sets,
4547 .hapd_set_beacon = i802_set_beacon,
4548 .set_cts_protect = i802_set_cts_protect,
4549 .set_preamble = i802_set_preamble,
4550 .set_short_slot_time = i802_set_short_slot_time,
4551 .set_tx_queue_params = i802_set_tx_queue_params,
4552 .bss_add = i802_bss_add,
4553 .bss_remove = i802_bss_remove,
4554 .if_add = i802_if_add,
4555 .if_update = i802_if_update,
4556 .if_remove = i802_if_remove,
4557 .set_sta_vlan = i802_set_sta_vlan,
4558 .get_neighbor_bss = i802_get_neighbor_bss,
4559 #endif /* HOSTAPD */