2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
16 #include <sys/ioctl.h>
17 #include <net/if_arp.h>
18 #include <netlink/genl/genl.h>
19 #include <netlink/genl/family.h>
20 #include <netlink/genl/ctrl.h>
21 #include "nl80211_copy.h"
22 #include "wireless_copy.h"
27 #include "ieee802_11_defs.h"
29 #if defined(CONFIG_AP) || defined(HOSTAPD)
30 #include <netpacket/packet.h>
31 #include <linux/filter.h>
33 #include "radiotap_iter.h"
34 #endif /* CONFIG_AP || HOSTAPD */
38 #include "../hostapd/hostapd_defs.h"
41 #define ETH_P_ALL 0x0003
44 #endif /* CONFIG_AP */
47 #include <netlink/msg.h>
48 #include <netlink/attr.h>
50 #include <net/if_arp.h>
52 #include "../../hostapd/hostapd.h"
53 #include "../../hostapd/config.h"
54 #include "../../hostapd/hw_features.h"
55 #include "../../hostapd/mlme.h"
56 #include "../../hostapd/sta_flags.h"
57 #include "ieee802_11_common.h"
60 /* libnl 2.0 compatibility code */
61 #define nl_handle_alloc_cb nl_socket_alloc_cb
62 #define nl_handle_destroy nl_socket_free
63 #endif /* CONFIG_LIBNL20 */
69 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
72 #define IFF_DORMANT 0x20000 /* driver signals dormant */
75 #ifndef IF_OPER_DORMANT
76 #define IF_OPER_DORMANT 5
83 struct i802_bss *next;
84 char ifname[IFNAMSIZ + 1];
85 unsigned int beacon_set:1;
88 struct wpa_driver_nl80211_data {
91 int ioctl_sock; /* socket for ioctl() use */
92 char ifname[IFNAMSIZ + 1];
95 struct wpa_driver_capa capa;
100 int scan_complete_events;
102 struct nl_handle *nl_handle;
103 struct nl_cache *nl_cache;
105 struct genl_family *nl80211;
114 unsigned int beacon_set:1;
117 #endif /* CONFIG_AP */
120 struct hostapd_data *hapd;
122 int wext_sock; /* socket for wireless events */
123 int eapol_sock; /* socket for EAPOL frames */
124 int monitor_sock; /* socket for monitor */
127 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 */
158 #define wpa_supplicant_event(c, e, d) do { } while (0)
162 static int ack_handler(struct nl_msg *msg, void *arg)
169 static int finish_handler(struct nl_msg *msg, void *arg)
176 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
184 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
186 int (*valid_handler)(struct nl_msg *, void *),
192 cb = nl_cb_clone(drv->nl_cb);
196 err = nl_send_auto_complete(drv->nl_handle, msg);
202 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
203 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
204 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
207 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
208 valid_handler, valid_data);
211 nl_recvmsgs(drv->nl_handle, cb);
225 static int family_handler(struct nl_msg *msg, void *arg)
227 struct family_data *res = arg;
228 struct nlattr *tb[CTRL_ATTR_MAX + 1];
229 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
230 struct nlattr *mcgrp;
233 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
234 genlmsg_attrlen(gnlh, 0), NULL);
235 if (!tb[CTRL_ATTR_MCAST_GROUPS])
238 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
239 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
240 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
241 nla_len(mcgrp), NULL);
242 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
243 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
244 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
246 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
248 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
256 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
257 const char *family, const char *group)
261 struct family_data res = { group, -ENOENT };
266 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
267 0, 0, CTRL_CMD_GETFAMILY, 0);
268 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
270 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
281 static int wpa_driver_nl80211_send_oper_ifla(
282 struct wpa_driver_nl80211_data *drv,
283 int linkmode, int operstate)
287 struct ifinfomsg ifinfo;
294 os_memset(&req, 0, sizeof(req));
296 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
297 req.hdr.nlmsg_type = RTM_SETLINK;
298 req.hdr.nlmsg_flags = NLM_F_REQUEST;
299 req.hdr.nlmsg_seq = ++nl_seq;
300 req.hdr.nlmsg_pid = 0;
302 req.ifinfo.ifi_family = AF_UNSPEC;
303 req.ifinfo.ifi_type = 0;
304 req.ifinfo.ifi_index = drv->ifindex;
305 req.ifinfo.ifi_flags = 0;
306 req.ifinfo.ifi_change = 0;
308 if (linkmode != -1) {
309 rta = (struct rtattr *)
310 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
311 rta->rta_type = IFLA_LINKMODE;
312 rta->rta_len = RTA_LENGTH(sizeof(char));
313 *((char *) RTA_DATA(rta)) = linkmode;
314 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
315 RTA_LENGTH(sizeof(char));
317 if (operstate != -1) {
318 rta = (struct rtattr *)
319 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
320 rta->rta_type = IFLA_OPERSTATE;
321 rta->rta_len = RTA_LENGTH(sizeof(char));
322 *((char *) RTA_DATA(rta)) = operstate;
323 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
324 RTA_LENGTH(sizeof(char));
327 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
328 linkmode, operstate);
330 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
332 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
333 "%s (assume operstate is not supported)",
337 return ret < 0 ? -1 : 0;
341 static int wpa_driver_nl80211_set_auth_param(
342 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
347 os_memset(&iwr, 0, sizeof(iwr));
348 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
349 iwr.u.param.flags = idx & IW_AUTH_INDEX;
350 iwr.u.param.value = value;
352 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
353 if (errno != EOPNOTSUPP) {
354 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
355 "value 0x%x) failed: %s)",
356 idx, value, strerror(errno));
358 ret = errno == EOPNOTSUPP ? -2 : -1;
365 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
367 struct wpa_driver_nl80211_data *drv = priv;
368 if (!drv->associated)
370 os_memcpy(bssid, drv->bssid, ETH_ALEN);
375 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
377 struct wpa_driver_nl80211_data *drv = priv;
378 if (!drv->associated)
380 os_memcpy(ssid, drv->ssid, drv->ssid_len);
381 return drv->ssid_len;
385 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
386 void *ctx, char *buf, size_t len,
389 union wpa_event_data event;
391 os_memset(&event, 0, sizeof(event));
392 if (len > sizeof(event.interface_status.ifname))
393 len = sizeof(event.interface_status.ifname) - 1;
394 os_memcpy(event.interface_status.ifname, buf, len);
395 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
396 EVENT_INTERFACE_ADDED;
398 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
400 event.interface_status.ifname,
401 del ? "removed" : "added");
403 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
410 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
414 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
417 struct ifinfomsg *ifi;
418 int attrlen, _nlmsg_len, rta_len;
423 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
425 attrlen = h->nlmsg_len - _nlmsg_len;
429 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
431 rta_len = RTA_ALIGN(sizeof(struct rtattr));
432 while (RTA_OK(attr, attrlen)) {
433 if (attr->rta_type == IFLA_IFNAME) {
434 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
440 attr = RTA_NEXT(attr, attrlen);
447 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
448 int ifindex, struct nlmsghdr *h)
450 if (drv->ifindex == ifindex)
453 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
454 drv->ifindex = if_nametoindex(drv->ifname);
455 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
457 wpa_driver_nl80211_finish_drv_init(drv);
465 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
466 void *ctx, struct nlmsghdr *h,
469 struct ifinfomsg *ifi;
470 int attrlen, _nlmsg_len, rta_len;
471 struct rtattr * attr;
473 if (len < sizeof(*ifi))
478 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
479 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
484 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
486 drv->operstate, ifi->ifi_flags,
487 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
488 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
489 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
490 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
492 * Some drivers send the association event before the operup event--in
493 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
494 * fails. This will hit us when wpa_supplicant does not need to do
495 * IEEE 802.1X authentication
497 if (drv->operstate == 1 &&
498 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
499 !(ifi->ifi_flags & IFF_RUNNING))
500 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
502 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
504 attrlen = h->nlmsg_len - _nlmsg_len;
508 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
510 rta_len = RTA_ALIGN(sizeof(struct rtattr));
511 while (RTA_OK(attr, attrlen)) {
512 if (attr->rta_type == IFLA_IFNAME) {
513 wpa_driver_nl80211_event_link(
515 ((char *) attr) + rta_len,
516 attr->rta_len - rta_len, 0);
518 attr = RTA_NEXT(attr, attrlen);
523 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
524 void *ctx, struct nlmsghdr *h,
527 struct ifinfomsg *ifi;
528 int attrlen, _nlmsg_len, rta_len;
529 struct rtattr * attr;
531 if (len < sizeof(*ifi))
536 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
538 attrlen = h->nlmsg_len - _nlmsg_len;
542 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
544 rta_len = RTA_ALIGN(sizeof(struct rtattr));
545 while (RTA_OK(attr, attrlen)) {
546 if (attr->rta_type == IFLA_IFNAME) {
547 wpa_driver_nl80211_event_link(
549 ((char *) attr) + rta_len,
550 attr->rta_len - rta_len, 1);
552 attr = RTA_NEXT(attr, attrlen);
557 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
562 struct sockaddr_nl from;
568 fromlen = sizeof(from);
569 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
570 (struct sockaddr *) &from, &fromlen);
572 if (errno != EINTR && errno != EAGAIN)
573 perror("recvfrom(netlink)");
577 h = (struct nlmsghdr *) buf;
578 while (left >= (int) sizeof(*h)) {
582 plen = len - sizeof(*h);
583 if (len > left || plen < 0) {
584 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
585 "len=%d left=%d plen=%d",
590 switch (h->nlmsg_type) {
592 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
596 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
601 len = NLMSG_ALIGN(len);
603 h = (struct nlmsghdr *) ((char *) h + len);
607 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
611 if (--max_events > 0) {
613 * Try to receive all events in one eloop call in order to
614 * limit race condition on cases where AssocInfo event, Assoc
615 * event, and EAPOL frames are received more or less at the
616 * same time. We want to process the event messages first
617 * before starting EAPOL processing.
624 static int no_seq_check(struct nl_msg *msg, void *arg)
630 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
631 const u8 *frame, size_t len)
633 const struct ieee80211_mgmt *mgmt;
634 union wpa_event_data event;
636 mgmt = (const struct ieee80211_mgmt *) frame;
637 if (len < 24 + sizeof(mgmt->u.auth)) {
638 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
643 os_memset(&event, 0, sizeof(event));
644 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
645 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
646 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
647 if (len > 24 + sizeof(mgmt->u.auth)) {
648 event.auth.ies = mgmt->u.auth.variable;
649 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
652 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
656 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
657 const u8 *frame, size_t len)
659 const struct ieee80211_mgmt *mgmt;
660 union wpa_event_data event;
663 mgmt = (const struct ieee80211_mgmt *) frame;
664 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
665 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
670 status = le_to_host16(mgmt->u.assoc_resp.status_code);
671 if (status != WLAN_STATUS_SUCCESS) {
672 os_memset(&event, 0, sizeof(event));
673 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
674 event.assoc_reject.resp_ies =
675 (u8 *) mgmt->u.assoc_resp.variable;
676 event.assoc_reject.resp_ies_len =
677 len - 24 - sizeof(mgmt->u.assoc_resp);
679 event.assoc_reject.status_code = status;
681 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
686 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
688 os_memset(&event, 0, sizeof(event));
689 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
690 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
691 event.assoc_info.resp_ies_len =
692 len - 24 - sizeof(mgmt->u.assoc_resp);
695 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
699 static void mlme_event(struct wpa_driver_nl80211_data *drv,
700 enum nl80211_commands cmd, struct nlattr *frame)
703 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
708 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
709 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
710 nla_data(frame), nla_len(frame));
713 case NL80211_CMD_AUTHENTICATE:
714 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
716 case NL80211_CMD_ASSOCIATE:
717 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
719 case NL80211_CMD_DEAUTHENTICATE:
721 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
723 case NL80211_CMD_DISASSOCIATE:
725 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
733 static int process_event(struct nl_msg *msg, void *arg)
735 struct wpa_driver_nl80211_data *drv = arg;
736 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
737 struct nlattr *tb[NL80211_ATTR_MAX + 1];
739 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
740 genlmsg_attrlen(gnlh, 0), NULL);
742 if (tb[NL80211_ATTR_IFINDEX]) {
743 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
744 if (ifindex != drv->ifindex) {
745 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
746 " for foreign interface (ifindex %d)",
753 case NL80211_CMD_NEW_SCAN_RESULTS:
754 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
755 drv->scan_complete_events = 1;
756 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
758 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
760 case NL80211_CMD_SCAN_ABORTED:
761 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
763 * Need to indicate that scan results are available in order
764 * not to make wpa_supplicant stop its scanning.
766 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
768 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
770 case NL80211_CMD_AUTHENTICATE:
771 case NL80211_CMD_ASSOCIATE:
772 case NL80211_CMD_DEAUTHENTICATE:
773 case NL80211_CMD_DISASSOCIATE:
774 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
777 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
778 "(cmd=%d)", gnlh->cmd);
786 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
790 struct wpa_driver_nl80211_data *drv = eloop_ctx;
792 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
794 cb = nl_cb_clone(drv->nl_cb);
797 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
798 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
799 nl_recvmsgs(drv->nl_handle, cb);
804 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
805 const char *ifname, int *flags)
809 os_memset(&ifr, 0, sizeof(ifr));
810 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
811 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
812 perror("ioctl[SIOCGIFFLAGS]");
815 *flags = ifr.ifr_flags & 0xffff;
821 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
822 * @drv: driver_nl80211 private data
823 * @flags: Pointer to returned flags value
824 * Returns: 0 on success, -1 on failure
826 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
829 return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
833 static int wpa_driver_nl80211_set_ifflags_ifname(
834 struct wpa_driver_nl80211_data *drv,
835 const char *ifname, int flags)
839 os_memset(&ifr, 0, sizeof(ifr));
840 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
841 ifr.ifr_flags = flags & 0xffff;
842 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
843 perror("SIOCSIFFLAGS");
851 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
852 * @drv: driver_nl80211 private data
853 * @flags: New value for flags
854 * Returns: 0 on success, -1 on failure
856 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
859 return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
864 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
865 * @priv: driver_nl80211 private data
866 * @alpha2_arg: country to which to switch to
867 * Returns: 0 on success, -1 on failure
869 * This asks nl80211 to set the regulatory domain for given
870 * country ISO / IEC alpha2.
872 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
874 struct wpa_driver_nl80211_data *drv = priv;
880 goto nla_put_failure;
882 alpha2[0] = alpha2_arg[0];
883 alpha2[1] = alpha2_arg[1];
886 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
887 0, NL80211_CMD_REQ_SET_REG, 0);
889 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
890 if (send_and_recv_msgs(drv, msg, NULL, NULL))
898 struct wiphy_info_data {
904 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
906 struct nlattr *tb[NL80211_ATTR_MAX + 1];
907 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
908 struct wiphy_info_data *info = arg;
910 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
911 genlmsg_attrlen(gnlh, 0), NULL);
913 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
914 info->max_scan_ssids =
915 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
917 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
918 struct nlattr *nl_mode;
920 nla_for_each_nested(nl_mode,
921 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
922 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
923 info->ap_supported = 1;
933 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
934 struct wiphy_info_data *info)
938 os_memset(info, 0, sizeof(*info));
943 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
944 0, NL80211_CMD_GET_WIPHY, 0);
946 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
948 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
957 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
959 struct wiphy_info_data info;
960 if (wpa_driver_nl80211_get_info(drv, &info))
962 drv->has_capability = 1;
963 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
964 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
965 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
966 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
967 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
968 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
969 WPA_DRIVER_CAPA_ENC_WEP104 |
970 WPA_DRIVER_CAPA_ENC_TKIP |
971 WPA_DRIVER_CAPA_ENC_CCMP;
973 drv->capa.max_scan_ssids = info.max_scan_ssids;
974 if (info.ap_supported)
975 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
980 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
981 * @ctx: context to be used when calling wpa_supplicant functions,
982 * e.g., wpa_supplicant_event()
983 * @ifname: interface name, e.g., wlan0
984 * Returns: Pointer to private data, %NULL on failure
986 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
989 struct sockaddr_nl local;
990 struct wpa_driver_nl80211_data *drv;
992 drv = os_zalloc(sizeof(*drv));
996 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
998 drv->monitor_ifidx = -1;
999 drv->monitor_sock = -1;
1000 #endif /* CONFIG_AP */
1002 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1003 if (drv->nl_cb == NULL) {
1004 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1009 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1010 if (drv->nl_handle == NULL) {
1011 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1016 if (genl_connect(drv->nl_handle)) {
1017 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1022 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1023 if (drv->nl_cache == NULL) {
1024 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1029 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1030 if (drv->nl80211 == NULL) {
1031 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1036 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1038 ret = nl_socket_add_membership(drv->nl_handle, ret);
1040 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1041 "membership for scan events: %d (%s)",
1042 ret, strerror(-ret));
1046 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1048 ret = nl_socket_add_membership(drv->nl_handle, ret);
1050 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1051 "membership for mlme events: %d (%s)",
1052 ret, strerror(-ret));
1055 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1057 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1058 wpa_driver_nl80211_event_receive, drv, ctx);
1060 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1061 if (drv->ioctl_sock < 0) {
1062 perror("socket(PF_INET,SOCK_DGRAM)");
1066 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1068 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1072 os_memset(&local, 0, sizeof(local));
1073 local.nl_family = AF_NETLINK;
1074 local.nl_groups = RTMGRP_LINK;
1075 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1076 perror("bind(netlink)");
1081 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1083 drv->link_event_sock = s;
1085 if (wpa_driver_nl80211_finish_drv_init(drv))
1091 eloop_unregister_read_sock(drv->link_event_sock);
1092 close(drv->link_event_sock);
1094 close(drv->ioctl_sock);
1096 genl_family_put(drv->nl80211);
1098 nl_cache_free(drv->nl_cache);
1100 nl_handle_destroy(drv->nl_handle);
1102 nl_cb_put(drv->nl_cb);
1110 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1114 drv->ifindex = if_nametoindex(drv->ifname);
1116 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1117 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1118 "use managed mode");
1121 if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1122 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1126 if (!(flags & IFF_UP)) {
1127 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1128 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1134 wpa_driver_nl80211_capa(drv);
1136 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1143 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1144 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1146 * Shut down driver interface and processing of driver events. Free
1147 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1149 static void wpa_driver_nl80211_deinit(void *priv)
1151 struct wpa_driver_nl80211_data *drv = priv;
1155 if (drv->monitor_ifidx >= 0)
1156 nl80211_remove_iface(drv, drv->monitor_ifidx);
1157 if (drv->monitor_sock >= 0) {
1158 eloop_unregister_read_sock(drv->monitor_sock);
1159 close(drv->monitor_sock);
1161 #endif /* CONFIG_AP */
1163 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1165 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1167 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1169 eloop_unregister_read_sock(drv->link_event_sock);
1171 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1172 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1173 wpa_driver_nl80211_set_mode(drv, 0);
1175 close(drv->link_event_sock);
1176 close(drv->ioctl_sock);
1178 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1179 genl_family_put(drv->nl80211);
1180 nl_cache_free(drv->nl_cache);
1181 nl_handle_destroy(drv->nl_handle);
1182 nl_cb_put(drv->nl_cb);
1189 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1190 * @eloop_ctx: Unused
1191 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1193 * This function can be used as registered timeout when starting a scan to
1194 * generate a scan completed event if the driver does not report this.
1196 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1198 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1199 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1204 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1205 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1206 * @params: Scan parameters
1207 * Returns: 0 on success, -1 on failure
1209 static int wpa_driver_nl80211_scan(void *priv,
1210 struct wpa_driver_scan_params *params)
1212 struct wpa_driver_nl80211_data *drv = priv;
1213 int ret = 0, timeout;
1214 struct nl_msg *msg, *ssids, *freqs;
1217 msg = nlmsg_alloc();
1218 ssids = nlmsg_alloc();
1219 freqs = nlmsg_alloc();
1220 if (!msg || !ssids || !freqs) {
1227 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1228 NL80211_CMD_TRIGGER_SCAN, 0);
1230 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1232 for (i = 0; i < params->num_ssids; i++) {
1233 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1234 params->ssids[i].ssid);
1236 if (params->num_ssids)
1237 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1239 if (params->extra_ies) {
1240 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1244 if (params->freqs) {
1245 for (i = 0; params->freqs[i]; i++)
1246 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1247 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1250 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1253 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1254 "(%s)", ret, strerror(-ret));
1255 goto nla_put_failure;
1258 /* Not all drivers generate "scan completed" wireless event, so try to
1259 * read results after a timeout. */
1261 if (drv->scan_complete_events) {
1263 * The driver seems to deliver events to notify when scan is
1264 * complete, so use longer timeout to avoid race conditions
1265 * with scanning and following association request.
1269 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1270 "seconds", ret, timeout);
1271 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1272 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1283 static int bss_info_handler(struct nl_msg *msg, void *arg)
1285 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1286 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1287 struct nlattr *bss[NL80211_BSS_MAX + 1];
1288 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1289 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1290 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1291 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1292 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1293 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1294 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1295 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1296 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1298 struct wpa_scan_results *res = arg;
1299 struct wpa_scan_res **tmp;
1300 struct wpa_scan_res *r;
1304 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1305 genlmsg_attrlen(gnlh, 0), NULL);
1306 if (!tb[NL80211_ATTR_BSS])
1308 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1311 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1312 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1313 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1319 r = os_zalloc(sizeof(*r) + ie_len);
1322 if (bss[NL80211_BSS_BSSID])
1323 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1325 if (bss[NL80211_BSS_FREQUENCY])
1326 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1327 if (bss[NL80211_BSS_BEACON_INTERVAL])
1328 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1329 if (bss[NL80211_BSS_CAPABILITY])
1330 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1331 r->flags |= WPA_SCAN_NOISE_INVALID;
1332 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1333 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1334 r->level /= 100; /* mBm to dBm */
1335 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1336 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1337 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1338 r->flags |= WPA_SCAN_LEVEL_INVALID;
1340 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1341 if (bss[NL80211_BSS_TSF])
1342 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1345 os_memcpy(r + 1, ie, ie_len);
1347 tmp = os_realloc(res->res,
1348 (res->num + 1) * sizeof(struct wpa_scan_res *));
1353 tmp[res->num++] = r;
1361 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1362 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1363 * Returns: Scan results on success, -1 on failure
1365 static struct wpa_scan_results *
1366 wpa_driver_nl80211_get_scan_results(void *priv)
1368 struct wpa_driver_nl80211_data *drv = priv;
1370 struct wpa_scan_results *res;
1373 res = os_zalloc(sizeof(*res));
1376 msg = nlmsg_alloc();
1378 goto nla_put_failure;
1380 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1381 NL80211_CMD_GET_SCAN, 0);
1382 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1384 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1387 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1388 (unsigned long) res->num);
1391 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1392 "(%s)", ret, strerror(-ret));
1395 wpa_scan_results_free(res);
1400 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1401 const u8 *addr, int key_idx,
1402 int set_tx, const u8 *seq,
1404 const u8 *key, size_t key_len)
1406 struct wpa_driver_nl80211_data *drv = priv;
1410 wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1411 "seq_len=%lu key_len=%lu",
1412 __func__, alg, addr, key_idx, set_tx,
1413 (unsigned long) seq_len, (unsigned long) key_len);
1415 msg = nlmsg_alloc();
1419 if (alg == WPA_ALG_NONE) {
1420 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1421 NL80211_CMD_DEL_KEY, 0);
1423 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1424 NL80211_CMD_NEW_KEY, 0);
1425 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1429 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1432 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1436 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1439 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1441 #ifdef CONFIG_IEEE80211W
1443 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1445 #endif /* CONFIG_IEEE80211W */
1452 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1454 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1455 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1457 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1458 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1460 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1462 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1466 if (set_tx && alg != WPA_ALG_NONE) {
1467 msg = nlmsg_alloc();
1471 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1472 0, NL80211_CMD_SET_KEY, 0);
1473 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1474 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1475 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1477 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1479 wpa_printf(MSG_DEBUG, "nl80211: set default key "
1480 "failed; err=%d", err);
1492 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1493 const u8 *addr, int cmd, u16 reason_code)
1498 msg = nlmsg_alloc();
1502 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1504 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1505 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1506 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1508 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1511 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1512 "(%s)", ret, strerror(-ret));
1513 goto nla_put_failure;
1523 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1526 struct wpa_driver_nl80211_data *drv = priv;
1527 wpa_printf(MSG_DEBUG, "%s", __func__);
1528 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1533 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1536 struct wpa_driver_nl80211_data *drv = priv;
1537 wpa_printf(MSG_DEBUG, "%s", __func__);
1538 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1543 static int wpa_driver_nl80211_authenticate(
1544 void *priv, struct wpa_driver_auth_params *params)
1546 struct wpa_driver_nl80211_data *drv = priv;
1549 enum nl80211_auth_type type;
1551 drv->associated = 0;
1553 msg = nlmsg_alloc();
1557 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1560 for (i = 0; i < 4; i++) {
1561 if (!params->wep_key[i])
1563 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1564 i == params->wep_tx_keyidx, NULL, 0,
1566 params->wep_key_len[i]);
1569 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1570 NL80211_CMD_AUTHENTICATE, 0);
1572 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1573 if (params->bssid) {
1574 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1575 MAC2STR(params->bssid));
1576 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1579 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1580 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1583 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1584 params->ssid, params->ssid_len);
1585 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1588 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1590 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1592 * TODO: if multiple auth_alg options enabled, try them one by one if
1593 * the AP rejects authentication due to unknown auth alg
1595 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1596 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1597 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1598 type = NL80211_AUTHTYPE_SHARED_KEY;
1599 else if (params->auth_alg & AUTH_ALG_LEAP)
1600 type = NL80211_AUTHTYPE_NETWORK_EAP;
1601 else if (params->auth_alg & AUTH_ALG_FT)
1602 type = NL80211_AUTHTYPE_FT;
1604 goto nla_put_failure;
1605 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1606 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1608 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1611 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1612 "(%s)", ret, strerror(-ret));
1613 goto nla_put_failure;
1616 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1625 #if defined(CONFIG_AP) || defined(HOSTAPD)
1627 struct phy_info_arg {
1629 struct hostapd_hw_modes *modes;
1632 static int phy_info_handler(struct nl_msg *msg, void *arg)
1634 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1635 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1636 struct phy_info_arg *phy_info = arg;
1638 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1640 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1641 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1642 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1643 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1644 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1645 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1646 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1647 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1650 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1651 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1652 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1653 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1656 struct nlattr *nl_band;
1657 struct nlattr *nl_freq;
1658 struct nlattr *nl_rate;
1659 int rem_band, rem_freq, rem_rate;
1660 struct hostapd_hw_modes *mode;
1661 int idx, mode_is_set;
1663 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1664 genlmsg_attrlen(gnlh, 0), NULL);
1666 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1669 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1670 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1673 phy_info->modes = mode;
1677 mode = &phy_info->modes[*(phy_info->num_modes)];
1678 memset(mode, 0, sizeof(*mode));
1679 *(phy_info->num_modes) += 1;
1681 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1682 nla_len(nl_band), NULL);
1684 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1685 mode->ht_capab = nla_get_u16(
1686 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1689 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1690 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1691 nla_len(nl_freq), freq_policy);
1692 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1694 mode->num_channels++;
1697 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1698 if (!mode->channels)
1703 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1704 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1705 nla_len(nl_freq), freq_policy);
1706 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1709 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1710 mode->channels[idx].flag = 0;
1713 /* crude heuristic */
1714 if (mode->channels[idx].freq < 4000)
1715 mode->mode = HOSTAPD_MODE_IEEE80211B;
1717 mode->mode = HOSTAPD_MODE_IEEE80211A;
1721 /* crude heuristic */
1722 if (mode->channels[idx].freq < 4000)
1723 if (mode->channels[idx].freq == 2484)
1724 mode->channels[idx].chan = 14;
1726 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1728 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1730 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1731 mode->channels[idx].flag |=
1732 HOSTAPD_CHAN_DISABLED;
1733 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1734 mode->channels[idx].flag |=
1735 HOSTAPD_CHAN_PASSIVE_SCAN;
1736 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1737 mode->channels[idx].flag |=
1738 HOSTAPD_CHAN_NO_IBSS;
1739 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1740 mode->channels[idx].flag |=
1743 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1744 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1745 mode->channels[idx].max_tx_power =
1746 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1751 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1752 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1753 nla_len(nl_rate), rate_policy);
1754 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1759 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1765 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1766 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1767 nla_len(nl_rate), rate_policy);
1768 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1770 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1772 /* crude heuristic */
1773 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1774 mode->rates[idx].rate > 200)
1775 mode->mode = HOSTAPD_MODE_IEEE80211G;
1777 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1778 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1787 static struct hostapd_hw_modes *
1788 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1791 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1792 int i, mode11g_idx = -1;
1794 /* If only 802.11g mode is included, use it to construct matching
1795 * 802.11b mode data. */
1797 for (m = 0; m < *num_modes; m++) {
1798 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1799 return modes; /* 802.11b already included */
1800 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1804 if (mode11g_idx < 0)
1805 return modes; /* 2.4 GHz band not supported at all */
1807 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1809 return modes; /* Could not add 802.11b mode */
1811 mode = &nmodes[*num_modes];
1812 os_memset(mode, 0, sizeof(*mode));
1816 mode->mode = HOSTAPD_MODE_IEEE80211B;
1818 mode11g = &modes[mode11g_idx];
1819 mode->num_channels = mode11g->num_channels;
1820 mode->channels = os_malloc(mode11g->num_channels *
1821 sizeof(struct hostapd_channel_data));
1822 if (mode->channels == NULL) {
1824 return modes; /* Could not add 802.11b mode */
1826 os_memcpy(mode->channels, mode11g->channels,
1827 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1829 mode->num_rates = 0;
1830 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1831 if (mode->rates == NULL) {
1832 os_free(mode->channels);
1834 return modes; /* Could not add 802.11b mode */
1837 for (i = 0; i < mode11g->num_rates; i++) {
1838 if (mode11g->rates[i].rate > 110 ||
1839 mode11g->rates[i].flags &
1840 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1842 mode->rates[mode->num_rates] = mode11g->rates[i];
1844 if (mode->num_rates == 4)
1848 if (mode->num_rates == 0) {
1849 os_free(mode->channels);
1850 os_free(mode->rates);
1852 return modes; /* No 802.11b rates */
1855 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1862 static struct hostapd_hw_modes *
1863 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1865 struct wpa_driver_nl80211_data *drv = priv;
1867 struct phy_info_arg result = {
1868 .num_modes = num_modes,
1875 msg = nlmsg_alloc();
1879 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1880 0, NL80211_CMD_GET_WIPHY, 0);
1882 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1884 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1885 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1890 #endif /* CONFIG_AP || HOSTAPD */
1895 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1896 const void *data, size_t len,
1900 0x00, 0x00, /* radiotap version */
1901 0x0e, 0x00, /* radiotap length */
1902 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1903 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1905 0x00, 0x00, /* RX and TX flags to indicate that */
1906 0x00, 0x00, /* this is the injected frame directly */
1908 struct iovec iov[2] = {
1910 .iov_base = &rtap_hdr,
1911 .iov_len = sizeof(rtap_hdr),
1914 .iov_base = (void *) data,
1918 struct msghdr msg = {
1923 .msg_control = NULL,
1924 .msg_controllen = 0,
1929 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1931 return sendmsg(drv->monitor_sock, &msg, 0);
1935 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1938 struct wpa_driver_nl80211_data *drv = priv;
1939 struct ieee80211_mgmt *mgmt;
1940 int do_not_encrypt = 0;
1943 mgmt = (struct ieee80211_mgmt *) data;
1944 fc = le_to_host16(mgmt->frame_control);
1946 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
1947 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
1949 * Only one of the authentication frame types is encrypted.
1950 * In order for static WEP encryption to work properly (i.e.,
1951 * to not encrypt the frame), we need to tell mac80211 about
1952 * the frames that must not be encrypted.
1954 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1955 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
1956 if (auth_alg == WLAN_AUTH_OPEN ||
1957 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
1961 return wpa_driver_nl80211_send_frame(drv, data, data_len,
1966 static int wpa_driver_nl80211_set_beacon(void *priv,
1967 const u8 *head, size_t head_len,
1968 const u8 *tail, size_t tail_len,
1971 struct wpa_driver_nl80211_data *drv = priv;
1973 u8 cmd = NL80211_CMD_NEW_BEACON;
1976 msg = nlmsg_alloc();
1980 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
1982 if (drv->beacon_set)
1983 cmd = NL80211_CMD_SET_BEACON;
1985 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1987 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1988 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1989 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1990 if (!drv->beacon_int)
1991 drv->beacon_int = 100;
1992 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1993 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
1995 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1997 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
1998 ret, strerror(-ret));
2000 drv->beacon_set = 1;
2007 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2009 struct wpa_driver_nl80211_data *drv = priv;
2012 drv->beacon_int = value;
2014 if (!drv->beacon_set)
2017 msg = nlmsg_alloc();
2021 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2022 "(beacon_set=%d)", value, drv->beacon_set);
2023 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2024 0, NL80211_CMD_SET_BEACON, 0);
2025 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2027 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2029 return send_and_recv_msgs(drv, msg, NULL, NULL);
2035 static int wpa_driver_nl80211_set_freq2(
2036 struct wpa_driver_nl80211_data *drv,
2037 struct wpa_driver_associate_params *params)
2042 msg = nlmsg_alloc();
2046 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2047 NL80211_CMD_SET_WIPHY, 0);
2049 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2051 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2053 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2056 wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2057 "%d (%s)", params->freq, ret, strerror(-ret));
2063 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2068 msg = nlmsg_alloc();
2070 goto nla_put_failure;
2072 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2073 0, NL80211_CMD_DEL_INTERFACE, 0);
2074 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2076 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2079 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2084 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2085 const char *ifname, enum nl80211_iftype iftype)
2087 struct nl_msg *msg, *flags = NULL;
2091 msg = nlmsg_alloc();
2095 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2096 0, NL80211_CMD_NEW_INTERFACE, 0);
2097 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2098 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2099 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2101 if (iftype == NL80211_IFTYPE_MONITOR) {
2104 flags = nlmsg_alloc();
2106 goto nla_put_failure;
2108 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2110 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2115 goto nla_put_failure;
2118 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2121 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2126 ifidx = if_nametoindex(ifname);
2135 enum ieee80211_msg_type {
2136 ieee80211_msg_normal = 0,
2137 ieee80211_msg_tx_callback_ack = 1,
2138 ieee80211_msg_tx_callback_fail = 2,
2142 void ap_tx_status(void *ctx, const u8 *addr,
2143 const u8 *buf, size_t len, int ack);
2144 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2145 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2146 struct hostapd_frame_info *fi);
2147 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2150 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2152 struct ieee80211_hdr *hdr;
2153 u16 fc, type, stype;
2155 hdr = (struct ieee80211_hdr *) buf;
2156 fc = le_to_host16(hdr->frame_control);
2158 type = WLAN_FC_GET_TYPE(fc);
2159 stype = WLAN_FC_GET_STYPE(fc);
2162 case WLAN_FC_TYPE_MGMT:
2163 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2164 ok ? "ACK" : "fail");
2165 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2167 case WLAN_FC_TYPE_CTRL:
2168 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2169 ok ? "ACK" : "fail");
2171 case WLAN_FC_TYPE_DATA:
2172 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2175 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2182 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2183 u8 *buf, size_t len,
2184 struct hostapd_frame_info *hfi,
2185 enum ieee80211_msg_type msg_type)
2187 struct ieee80211_hdr *hdr;
2188 u16 fc, type, stype;
2189 size_t data_len = len;
2192 * PS-Poll frames are 16 bytes. All other frames are
2193 * 24 bytes or longer.
2198 hdr = (struct ieee80211_hdr *) buf;
2199 fc = le_to_host16(hdr->frame_control);
2201 type = WLAN_FC_GET_TYPE(fc);
2202 stype = WLAN_FC_GET_STYPE(fc);
2205 case WLAN_FC_TYPE_DATA:
2208 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2211 case WLAN_FC_FROMDS:
2218 case WLAN_FC_TYPE_CTRL:
2219 /* discard non-ps-poll frames */
2220 if (stype != WLAN_FC_STYPE_PSPOLL)
2223 case WLAN_FC_TYPE_MGMT:
2231 case ieee80211_msg_normal:
2232 /* continue processing */
2234 case ieee80211_msg_tx_callback_ack:
2235 handle_tx_callback(drv->ctx, buf, data_len, 1);
2237 case ieee80211_msg_tx_callback_fail:
2238 handle_tx_callback(drv->ctx, buf, data_len, 0);
2243 case WLAN_FC_TYPE_MGMT:
2244 if (stype != WLAN_FC_STYPE_BEACON &&
2245 stype != WLAN_FC_STYPE_PROBE_REQ)
2246 wpa_printf(MSG_MSGDUMP, "MGMT");
2247 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2249 case WLAN_FC_TYPE_CTRL:
2250 /* can only get here with PS-Poll frames */
2251 wpa_printf(MSG_DEBUG, "CTRL");
2252 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2254 case WLAN_FC_TYPE_DATA:
2255 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2261 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2263 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2265 unsigned char buf[3000];
2266 struct ieee80211_radiotap_iterator iter;
2268 struct hostapd_frame_info hfi;
2269 int injected = 0, failed = 0, msg_type, rxflags = 0;
2271 len = recv(sock, buf, sizeof(buf), 0);
2277 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2278 printf("received invalid radiotap frame\n");
2282 memset(&hfi, 0, sizeof(hfi));
2285 ret = ieee80211_radiotap_iterator_next(&iter);
2289 printf("received invalid radiotap frame (%d)\n", ret);
2292 switch (iter.this_arg_index) {
2293 case IEEE80211_RADIOTAP_FLAGS:
2294 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2297 case IEEE80211_RADIOTAP_RX_FLAGS:
2300 case IEEE80211_RADIOTAP_TX_FLAGS:
2302 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2303 IEEE80211_RADIOTAP_F_TX_FAIL;
2305 case IEEE80211_RADIOTAP_DATA_RETRIES:
2307 case IEEE80211_RADIOTAP_CHANNEL:
2308 /* TODO convert from freq/flags to channel number
2313 case IEEE80211_RADIOTAP_RATE:
2314 hfi.datarate = *iter.this_arg * 5;
2316 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2317 hfi.ssi_signal = *iter.this_arg;
2322 if (rxflags && injected)
2326 msg_type = ieee80211_msg_normal;
2328 msg_type = ieee80211_msg_tx_callback_fail;
2330 msg_type = ieee80211_msg_tx_callback_ack;
2332 handle_frame(drv, buf + iter.max_length,
2333 len - iter.max_length, &hfi, msg_type);
2338 * we post-process the filter code later and rewrite
2339 * this to the offset to the last instruction
2344 static struct sock_filter msock_filter_insns[] = {
2346 * do a little-endian load of the radiotap length field
2348 /* load lower byte into A */
2349 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2350 /* put it into X (== index register) */
2351 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2352 /* load upper byte into A */
2353 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2354 /* left-shift it by 8 */
2355 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2357 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2358 /* put result into X */
2359 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2362 * Allow management frames through, this also gives us those
2363 * management frames that we sent ourselves with status
2365 /* load the lower byte of the IEEE 802.11 frame control field */
2366 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2367 /* mask off frame type and version */
2368 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2369 /* accept frame if it's both 0, fall through otherwise */
2370 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2373 * TODO: add a bit to radiotap RX flags that indicates
2374 * that the sending station is not associated, then
2375 * add a filter here that filters on our DA and that flag
2376 * to allow us to deauth frames to that bad station.
2378 * Not a regression -- we didn't do it before either.
2383 * drop non-data frames, WDS frames
2385 /* load the lower byte of the frame control field */
2386 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2387 /* mask off QoS bit */
2388 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2389 /* drop non-data frames */
2390 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2391 /* load the upper byte of the frame control field */
2392 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2393 /* mask off toDS/fromDS */
2394 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2395 /* drop WDS frames */
2396 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2400 * add header length to index
2402 /* load the lower byte of the frame control field */
2403 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2404 /* mask off QoS bit */
2405 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2406 /* right shift it by 6 to give 0 or 2 */
2407 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2408 /* add data frame header length */
2409 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2410 /* add index, was start of 802.11 header */
2411 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2412 /* move to index, now start of LL header */
2413 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2416 * Accept empty data frames, we use those for
2419 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2420 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2423 * Accept EAPOL frames
2425 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2426 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2427 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2428 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2430 /* keep these last two statements or change the code below */
2431 /* return 0 == "DROP" */
2432 BPF_STMT(BPF_RET | BPF_K, 0),
2433 /* return ~0 == "keep all" */
2434 BPF_STMT(BPF_RET | BPF_K, ~0),
2437 static struct sock_fprog msock_filter = {
2438 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2439 .filter = msock_filter_insns,
2443 static int add_monitor_filter(int s)
2447 /* rewrite all PASS/FAIL jump offsets */
2448 for (idx = 0; idx < msock_filter.len; idx++) {
2449 struct sock_filter *insn = &msock_filter_insns[idx];
2451 if (BPF_CLASS(insn->code) == BPF_JMP) {
2452 if (insn->code == (BPF_JMP|BPF_JA)) {
2453 if (insn->k == PASS)
2454 insn->k = msock_filter.len - idx - 2;
2455 else if (insn->k == FAIL)
2456 insn->k = msock_filter.len - idx - 3;
2459 if (insn->jt == PASS)
2460 insn->jt = msock_filter.len - idx - 2;
2461 else if (insn->jt == FAIL)
2462 insn->jt = msock_filter.len - idx - 3;
2464 if (insn->jf == PASS)
2465 insn->jf = msock_filter.len - idx - 2;
2466 else if (insn->jf == FAIL)
2467 insn->jf = msock_filter.len - idx - 3;
2471 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2472 &msock_filter, sizeof(msock_filter))) {
2473 perror("SO_ATTACH_FILTER");
2482 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2485 struct sockaddr_ll ll;
2490 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2491 buf[IFNAMSIZ - 1] = '\0';
2493 drv->monitor_ifidx =
2494 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
2496 if (drv->monitor_ifidx < 0)
2499 if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0) {
2500 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
2504 if (!(flags & IFF_UP)) {
2505 if (wpa_driver_nl80211_set_ifflags_ifname(drv, buf,
2506 flags | IFF_UP) != 0)
2508 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
2514 memset(&ll, 0, sizeof(ll));
2515 ll.sll_family = AF_PACKET;
2516 ll.sll_ifindex = drv->monitor_ifidx;
2517 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2518 if (drv->monitor_sock < 0) {
2519 perror("socket[PF_PACKET,SOCK_RAW]");
2523 if (add_monitor_filter(drv->monitor_sock)) {
2524 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2525 "interface; do filtering in user space");
2526 /* This works, but will cost in performance. */
2529 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
2531 perror("monitor socket bind");
2535 optlen = sizeof(optval);
2538 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2539 perror("Failed to set socket priority");
2543 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2545 printf("Could not register monitor read socket\n");
2551 nl80211_remove_iface(drv, drv->monitor_ifidx);
2556 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2557 struct wpa_driver_associate_params *params)
2559 if (drv->monitor_ifidx < 0 &&
2560 nl80211_create_monitor_interface(drv))
2563 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2564 wpa_driver_nl80211_set_freq2(drv, params)) {
2565 nl80211_remove_iface(drv, drv->monitor_ifidx);
2566 drv->monitor_ifidx = -1;
2570 /* TODO: setup monitor interface (and add code somewhere to remove this
2571 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2575 #endif /* CONFIG_AP */
2578 static int wpa_driver_nl80211_associate(
2579 void *priv, struct wpa_driver_associate_params *params)
2581 struct wpa_driver_nl80211_data *drv = priv;
2586 if (params->mode == 2)
2587 return wpa_driver_nl80211_ap(drv, params);
2588 #endif /* CONFIG_AP */
2590 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2591 params->drop_unencrypted);
2593 drv->associated = 0;
2595 msg = nlmsg_alloc();
2599 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2601 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2602 NL80211_CMD_ASSOCIATE, 0);
2604 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2605 if (params->bssid) {
2606 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2607 MAC2STR(params->bssid));
2608 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2611 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2612 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2615 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2616 params->ssid, params->ssid_len);
2617 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2619 if (params->ssid_len > sizeof(drv->ssid))
2620 goto nla_put_failure;
2621 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2622 drv->ssid_len = params->ssid_len;
2624 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2626 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2629 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2632 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2633 "(%s)", ret, strerror(-ret));
2634 goto nla_put_failure;
2637 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2647 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2648 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2649 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2650 * Returns: 0 on success, -1 on failure
2652 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2655 int ret = -1, flags;
2661 nlmode = NL80211_IFTYPE_STATION;
2664 nlmode = NL80211_IFTYPE_ADHOC;
2667 nlmode = NL80211_IFTYPE_AP;
2673 msg = nlmsg_alloc();
2677 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2678 0, NL80211_CMD_SET_INTERFACE, 0);
2679 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2680 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2682 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2689 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2690 ret, strerror(-ret));
2694 /* mac80211 doesn't allow mode changes while the device is up, so
2695 * take the device down, try to set the mode again, and bring the
2698 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2699 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2701 /* Try to set the mode again while the interface is down */
2702 msg = nlmsg_alloc();
2706 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2707 0, NL80211_CMD_SET_INTERFACE, 0);
2708 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2709 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2710 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2712 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2713 "mode(try_again): %d (%s)",
2714 drv->ifname, ret, strerror(-ret));
2717 /* Ignore return value of get_ifflags to ensure that the device
2718 * is always up like it was before this function was called.
2720 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2721 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2728 static int wpa_driver_nl80211_get_capa(void *priv,
2729 struct wpa_driver_capa *capa)
2731 struct wpa_driver_nl80211_data *drv = priv;
2732 if (!drv->has_capability)
2734 os_memcpy(capa, &drv->capa, sizeof(*capa));
2739 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2741 struct wpa_driver_nl80211_data *drv = priv;
2743 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2744 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2745 drv->operstate = state;
2746 return wpa_driver_nl80211_send_oper_ifla(
2747 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2753 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2755 enum ieee80211_msg_type {
2756 ieee80211_msg_normal = 0,
2757 ieee80211_msg_tx_callback_ack = 1,
2758 ieee80211_msg_tx_callback_fail = 2,
2762 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2763 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2766 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2769 struct i802_bss *bss = &drv->bss;
2771 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2775 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2780 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2785 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2787 for (i = 0; i < drv->num_if_indices; i++) {
2788 if (drv->if_indices[i] == 0) {
2789 drv->if_indices[i] = ifidx;
2794 if (drv->if_indices != drv->default_if_indices)
2795 old = drv->if_indices;
2799 drv->if_indices = realloc(old,
2800 sizeof(int) * (drv->num_if_indices + 1));
2801 if (!drv->if_indices) {
2803 drv->if_indices = drv->default_if_indices;
2805 drv->if_indices = old;
2806 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2808 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2811 drv->if_indices[drv->num_if_indices] = ifidx;
2812 drv->num_if_indices++;
2816 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2820 for (i = 0; i < drv->num_if_indices; i++) {
2821 if (drv->if_indices[i] == ifidx) {
2822 drv->if_indices[i] = 0;
2829 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2833 for (i = 0; i < drv->num_if_indices; i++)
2834 if (drv->if_indices[i] == ifidx)
2841 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
2842 const char *ifname, int dev_up)
2846 if (drv->ioctl_sock < 0)
2849 memset(&ifr, 0, sizeof(ifr));
2850 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
2852 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
2853 perror("ioctl[SIOCGIFFLAGS]");
2854 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
2860 ifr.ifr_flags |= IFF_UP;
2862 ifr.ifr_flags &= ~IFF_UP;
2864 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
2865 perror("ioctl[SIOCSIFFLAGS]");
2873 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
2874 wpa_alg alg, const u8 *addr, int idx, const u8 *key,
2875 size_t key_len, int txkey)
2880 msg = nlmsg_alloc();
2884 if (alg == WPA_ALG_NONE) {
2885 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2886 0, NL80211_CMD_DEL_KEY, 0);
2888 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2889 0, NL80211_CMD_NEW_KEY, 0);
2890 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2894 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2897 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2901 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
2904 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
2907 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
2910 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2911 "algorithm %d", __func__, alg);
2918 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2919 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2920 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2922 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2927 * If we failed or don't need to set the default TX key (below),
2930 if (ret || !txkey || addr)
2933 msg = nlmsg_alloc();
2937 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2938 0, NL80211_CMD_SET_KEY, 0);
2939 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2940 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2941 if (alg == WPA_ALG_IGTK)
2942 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2944 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2946 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2955 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2956 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2957 size_t seq_len, const u8 *key, size_t key_len)
2959 struct wpa_driver_nl80211_data *drv = priv;
2962 ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx, key,
2971 static inline int min_int(int a, int b)
2979 static int get_key_handler(struct nl_msg *msg, void *arg)
2981 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2982 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2984 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2985 genlmsg_attrlen(gnlh, 0), NULL);
2988 * TODO: validate the key index and mac address!
2989 * Otherwise, there's a race condition as soon as
2990 * the kernel starts sending key notifications.
2993 if (tb[NL80211_ATTR_KEY_SEQ])
2994 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2995 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3000 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3003 struct wpa_driver_nl80211_data *drv = priv;
3006 msg = nlmsg_alloc();
3010 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3011 0, NL80211_CMD_GET_KEY, 0);
3014 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3015 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3016 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3020 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3026 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3029 struct wpa_driver_nl80211_data *drv = priv;
3031 u8 rates[NL80211_MAX_SUPP_RATES];
3035 msg = nlmsg_alloc();
3039 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3040 NL80211_CMD_SET_BSS, 0);
3042 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3043 rates[rates_len++] = basic_rates[i] / 5;
3045 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3047 /* TODO: multi-BSS support */
3048 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3050 return send_and_recv_msgs(drv, msg, NULL, NULL);
3056 static int i802_send_frame(void *priv, const void *data, size_t len,
3057 int encrypt, int flags)
3060 0x00, 0x00, /* radiotap version */
3061 0x0e, 0x00, /* radiotap length */
3062 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
3063 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
3065 0x00, 0x00, /* RX and TX flags to indicate that */
3066 0x00, 0x00, /* this is the injected frame directly */
3068 struct wpa_driver_nl80211_data *drv = priv;
3069 struct iovec iov[2] = {
3071 .iov_base = &rtap_hdr,
3072 .iov_len = sizeof(rtap_hdr),
3075 .iov_base = (void*)data,
3079 struct msghdr msg = {
3084 .msg_control = NULL,
3085 .msg_controllen = 0,
3090 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
3092 return sendmsg(drv->monitor_sock, &msg, flags);
3095 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
3098 struct ieee80211_mgmt *mgmt;
3099 int do_not_encrypt = 0;
3102 mgmt = (struct ieee80211_mgmt *) data;
3103 fc = le_to_host16(mgmt->frame_control);
3105 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
3106 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
3108 * Only one of the authentication frame types is encrypted.
3109 * In order for static WEP encryption to work properly (i.e.,
3110 * to not encrypt the frame), we need to tell mac80211 about
3111 * the frames that must not be encrypted.
3113 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
3114 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3115 if (auth_alg == WLAN_AUTH_OPEN ||
3116 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
3120 return i802_send_frame(priv, data, len, !do_not_encrypt, flags);
3123 /* Set kernel driver on given frequency (MHz) */
3124 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3126 struct wpa_driver_nl80211_data *drv = priv;
3129 msg = nlmsg_alloc();
3133 drv->last_freq = freq->freq;
3134 drv->last_freq_ht = freq->ht_enabled;
3136 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3137 NL80211_CMD_SET_WIPHY, 0);
3139 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3140 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3141 if (freq->ht_enabled) {
3142 switch (freq->sec_channel_offset) {
3144 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3145 NL80211_CHAN_HT40MINUS);
3148 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3149 NL80211_CHAN_HT40PLUS);
3152 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3158 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3165 static int i802_set_rts(void *priv, int rts)
3167 struct wpa_driver_nl80211_data *drv = priv;
3170 memset(&iwr, 0, sizeof(iwr));
3171 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3172 iwr.u.rts.value = rts;
3173 iwr.u.rts.fixed = 1;
3175 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3176 perror("ioctl[SIOCSIWRTS]");
3184 static int i802_set_frag(void *priv, int frag)
3186 struct wpa_driver_nl80211_data *drv = priv;
3189 memset(&iwr, 0, sizeof(iwr));
3190 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3191 iwr.u.frag.value = frag;
3192 iwr.u.frag.fixed = 1;
3194 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3195 perror("ioctl[SIOCSIWFRAG]");
3203 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3205 struct wpa_driver_nl80211_data *drv = priv;
3208 memset(&iwr, 0, sizeof(iwr));
3209 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3211 iwr.u.retry.value = short_retry;
3212 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3213 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3214 perror("ioctl[SIOCSIWRETRY(short)]");
3218 iwr.u.retry.value = long_retry;
3219 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3220 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3221 perror("ioctl[SIOCSIWRETRY(long)]");
3229 static int i802_flush(void *priv)
3231 struct wpa_driver_nl80211_data *drv = priv;
3234 msg = nlmsg_alloc();
3238 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3239 0, NL80211_CMD_DEL_STATION, 0);
3242 * XXX: FIX! this needs to flush all VLANs too
3244 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3245 if_nametoindex(drv->ifname));
3247 return send_and_recv_msgs(drv, msg, NULL, NULL);
3253 static int get_sta_handler(struct nl_msg *msg, void *arg)
3255 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3256 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3257 struct hostap_sta_driver_data *data = arg;
3258 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3259 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3260 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3261 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3262 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3263 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3264 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3267 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3268 genlmsg_attrlen(gnlh, 0), NULL);
3271 * TODO: validate the interface and mac address!
3272 * Otherwise, there's a race condition as soon as
3273 * the kernel starts sending station notifications.
3276 if (!tb[NL80211_ATTR_STA_INFO]) {
3277 wpa_printf(MSG_DEBUG, "sta stats missing!");
3280 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3281 tb[NL80211_ATTR_STA_INFO],
3283 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3287 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3288 data->inactive_msec =
3289 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3290 if (stats[NL80211_STA_INFO_RX_BYTES])
3291 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3292 if (stats[NL80211_STA_INFO_TX_BYTES])
3293 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3294 if (stats[NL80211_STA_INFO_RX_PACKETS])
3296 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3297 if (stats[NL80211_STA_INFO_TX_PACKETS])
3299 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3304 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3307 struct wpa_driver_nl80211_data *drv = priv;
3310 os_memset(data, 0, sizeof(*data));
3311 msg = nlmsg_alloc();
3315 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3316 0, NL80211_CMD_GET_STATION, 0);
3318 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3319 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3321 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3327 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3328 size_t data_len, int encrypt, const u8 *own_addr)
3330 struct wpa_driver_nl80211_data *drv = priv;
3331 struct ieee80211_hdr *hdr;
3336 int qos = sta->flags & WLAN_STA_WME;
3341 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3343 hdr = os_zalloc(len);
3345 printf("malloc() failed for i802_send_data(len=%lu)\n",
3346 (unsigned long) len);
3350 hdr->frame_control =
3351 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3352 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3354 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3355 #if 0 /* To be enabled if qos determination is added above */
3357 hdr->frame_control |=
3358 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3362 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3363 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3364 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3365 pos = (u8 *) (hdr + 1);
3367 #if 0 /* To be enabled if qos determination is added above */
3369 /* add an empty QoS header if needed */
3376 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3377 pos += sizeof(rfc1042_header);
3378 WPA_PUT_BE16(pos, ETH_P_PAE);
3380 memcpy(pos, data, data_len);
3382 res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
3386 perror("i802_send_eapol: send");
3387 printf("i802_send_eapol - packet len: %lu - failed\n",
3388 (unsigned long) len);
3395 static int i802_sta_add(const char *ifname, void *priv,
3396 struct hostapd_sta_add_params *params)
3398 struct wpa_driver_nl80211_data *drv = priv;
3402 msg = nlmsg_alloc();
3406 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3407 0, NL80211_CMD_NEW_STATION, 0);
3409 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3410 if_nametoindex(drv->ifname));
3411 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3412 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3413 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3414 params->supp_rates);
3415 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3416 params->listen_interval);
3418 #ifdef CONFIG_IEEE80211N
3419 if (params->ht_capabilities) {
3420 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3421 params->ht_capabilities->length,
3422 ¶ms->ht_capabilities->data);
3424 #endif /* CONFIG_IEEE80211N */
3426 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3428 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3429 "result: %d (%s)", ret, strerror(-ret));
3437 static int i802_sta_remove(void *priv, const u8 *addr)
3439 struct wpa_driver_nl80211_data *drv = priv;
3443 msg = nlmsg_alloc();
3447 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3448 0, NL80211_CMD_DEL_STATION, 0);
3450 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3451 if_nametoindex(drv->ifname));
3452 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3454 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3463 static int i802_sta_set_flags(void *priv, const u8 *addr,
3464 int total_flags, int flags_or, int flags_and)
3466 struct wpa_driver_nl80211_data *drv = priv;
3467 struct nl_msg *msg, *flags = NULL;
3469 msg = nlmsg_alloc();
3473 flags = nlmsg_alloc();
3479 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3480 0, NL80211_CMD_SET_STATION, 0);
3482 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3483 if_nametoindex(drv->ifname));
3484 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3486 if (total_flags & WLAN_STA_AUTHORIZED)
3487 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3489 if (total_flags & WLAN_STA_WMM)
3490 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3492 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3493 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3495 if (total_flags & WLAN_STA_MFP)
3496 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3498 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3499 goto nla_put_failure;
3503 return send_and_recv_msgs(drv, msg, NULL, NULL);
3510 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3511 int cw_min, int cw_max, int burst_time)
3513 struct wpa_driver_nl80211_data *drv = priv;
3515 struct nlattr *txq, *params;
3517 msg = nlmsg_alloc();
3521 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3522 0, NL80211_CMD_SET_WIPHY, 0);
3524 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3526 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3528 goto nla_put_failure;
3530 /* We are only sending parameters for a single TXQ at a time */
3531 params = nla_nest_start(msg, 1);
3533 goto nla_put_failure;
3535 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3536 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3537 * 32 usec, so need to convert the value here. */
3538 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3539 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3540 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3541 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3543 nla_nest_end(msg, params);
3545 nla_nest_end(msg, txq);
3547 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3554 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, int ifidx)
3558 /* stop listening for EAPOL on this interface */
3559 del_ifidx(drv, ifidx);
3561 msg = nlmsg_alloc();
3563 goto nla_put_failure;
3565 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3566 0, NL80211_CMD_DEL_INTERFACE, 0);
3567 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3569 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3572 printf("Failed to remove interface.\n");
3576 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3578 enum nl80211_iftype iftype,
3581 struct nl_msg *msg, *flags = NULL;
3587 msg = nlmsg_alloc();
3591 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3592 0, NL80211_CMD_NEW_INTERFACE, 0);
3593 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3594 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3595 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3597 if (iftype == NL80211_IFTYPE_MONITOR) {
3600 flags = nlmsg_alloc();
3602 goto nla_put_failure;
3604 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3606 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3611 goto nla_put_failure;
3614 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3617 printf("Failed to create interface %s.\n", ifname);
3621 ifidx = if_nametoindex(ifname);
3626 /* start listening for EAPOL on this interface */
3627 add_ifidx(drv, ifidx);
3631 case NL80211_IFTYPE_AP:
3632 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
3633 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
3634 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
3636 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
3637 nl80211_remove_iface(drv, ifidx);
3641 case NL80211_IFTYPE_WDS:
3642 memset(&iwr, 0, sizeof(iwr));
3643 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
3644 iwr.u.addr.sa_family = ARPHRD_ETHER;
3645 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
3646 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
3659 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3661 struct wpa_driver_nl80211_data *drv = priv;
3663 struct i802_bss *bss;
3665 bss = os_zalloc(sizeof(*bss));
3668 os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3670 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3675 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3676 nl80211_remove_iface(priv, ifidx);
3680 bss->next = drv->bss.next;
3681 drv->bss.next = bss;
3686 static int i802_bss_remove(void *priv, const char *ifname)
3688 struct wpa_driver_nl80211_data *drv = priv;
3689 struct i802_bss *bss, *prev;
3690 nl80211_remove_iface(priv, if_nametoindex(ifname));
3692 bss = drv->bss.next;
3694 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3695 prev->next = bss->next;
3706 static int i802_set_beacon(const char *iface, void *priv,
3707 const u8 *head, size_t head_len,
3708 const u8 *tail, size_t tail_len, int dtim_period)
3710 struct wpa_driver_nl80211_data *drv = priv;
3712 u8 cmd = NL80211_CMD_NEW_BEACON;
3714 struct i802_bss *bss;
3716 bss = get_bss(drv, iface);
3720 msg = nlmsg_alloc();
3724 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3725 iface, bss->beacon_set);
3726 if (bss->beacon_set)
3727 cmd = NL80211_CMD_SET_BEACON;
3729 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3731 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3732 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3733 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3734 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3735 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3737 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3739 bss->beacon_set = 1;
3746 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3750 msg = nlmsg_alloc();
3754 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3755 0, NL80211_CMD_DEL_BEACON, 0);
3756 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3758 return send_and_recv_msgs(drv, msg, NULL, NULL);
3764 static int i802_set_beacon_int(void *priv, int value)
3766 struct wpa_driver_nl80211_data *drv = priv;
3769 drv->beacon_int = value;
3771 if (!drv->bss.beacon_set)
3774 msg = nlmsg_alloc();
3778 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3779 "(beacon_set=%d)", value, drv->bss.beacon_set);
3780 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3781 0, NL80211_CMD_SET_BEACON, 0);
3782 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3784 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3786 return send_and_recv_msgs(drv, msg, NULL, NULL);
3792 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3794 struct wpa_driver_nl80211_data *drv = priv;
3797 msg = nlmsg_alloc();
3801 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3802 NL80211_CMD_SET_BSS, 0);
3805 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3807 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3809 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3811 /* TODO: multi-BSS support */
3812 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3814 return send_and_recv_msgs(drv, msg, NULL, NULL);
3820 static int i802_set_cts_protect(void *priv, int value)
3822 return i802_set_bss(priv, value, -1, -1);
3826 static int i802_set_preamble(void *priv, int value)
3828 return i802_set_bss(priv, -1, value, -1);
3832 static int i802_set_short_slot_time(void *priv, int value)
3834 return i802_set_bss(priv, -1, -1, value);
3838 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3841 case HOSTAPD_IF_VLAN:
3842 return NL80211_IFTYPE_AP_VLAN;
3843 case HOSTAPD_IF_WDS:
3844 return NL80211_IFTYPE_WDS;
3850 static int i802_if_add(const char *iface, void *priv,
3851 enum hostapd_driver_if_type type, char *ifname,
3854 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3860 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3861 char *ifname, const u8 *addr)
3863 /* unused at the moment */
3868 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3869 const char *ifname, const u8 *addr)
3871 nl80211_remove_iface(priv, if_nametoindex(ifname));
3876 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3877 const char *ifname, int vlan_id)
3879 struct wpa_driver_nl80211_data *drv = priv;
3882 msg = nlmsg_alloc();
3886 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3887 0, NL80211_CMD_SET_STATION, 0);
3889 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3890 if_nametoindex(drv->ifname));
3891 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3892 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3893 if_nametoindex(ifname));
3895 return send_and_recv_msgs(drv, msg, NULL, NULL);
3901 static int i802_set_country(void *priv, const char *country)
3903 struct wpa_driver_nl80211_data *drv = priv;
3907 msg = nlmsg_alloc();
3911 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3912 0, NL80211_CMD_REQ_SET_REG, 0);
3914 alpha2[0] = country[0];
3915 alpha2[1] = country[1];
3917 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
3919 return send_and_recv_msgs(drv, msg, NULL, NULL);
3925 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
3928 struct ieee80211_hdr *hdr;
3929 u16 fc, type, stype;
3931 hdr = (struct ieee80211_hdr *) buf;
3932 fc = le_to_host16(hdr->frame_control);
3934 type = WLAN_FC_GET_TYPE(fc);
3935 stype = WLAN_FC_GET_STYPE(fc);
3938 case WLAN_FC_TYPE_MGMT:
3939 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
3940 ok ? "ACK" : "fail");
3941 hostapd_mgmt_tx_cb(hapd, buf, len, stype, ok);
3943 case WLAN_FC_TYPE_CTRL:
3944 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
3945 ok ? "ACK" : "fail");
3947 case WLAN_FC_TYPE_DATA:
3948 hostapd_tx_status(hapd, hdr->addr1, buf, len, ok);
3951 printf("unknown TX callback frame type %d\n", type);
3957 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3958 struct hostapd_iface *iface, u8 *buf, size_t len,
3959 struct hostapd_frame_info *hfi,
3960 enum ieee80211_msg_type msg_type)
3962 struct ieee80211_hdr *hdr;
3963 u16 fc, type, stype;
3964 size_t data_len = len;
3965 struct hostapd_data *hapd = NULL;
3966 int broadcast_bssid = 0;
3971 * PS-Poll frames are 16 bytes. All other frames are
3972 * 24 bytes or longer.
3977 hdr = (struct ieee80211_hdr *) buf;
3978 fc = le_to_host16(hdr->frame_control);
3980 type = WLAN_FC_GET_TYPE(fc);
3981 stype = WLAN_FC_GET_STYPE(fc);
3984 case WLAN_FC_TYPE_DATA:
3987 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3991 case WLAN_FC_FROMDS:
3999 case WLAN_FC_TYPE_CTRL:
4000 /* discard non-ps-poll frames */
4001 if (stype != WLAN_FC_STYPE_PSPOLL)
4005 case WLAN_FC_TYPE_MGMT:
4013 /* find interface frame belongs to */
4014 for (i = 0; i < iface->num_bss; i++) {
4015 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
4016 hapd = iface->bss[i];
4022 hapd = iface->bss[0];
4024 if (bssid[0] != 0xff || bssid[1] != 0xff ||
4025 bssid[2] != 0xff || bssid[3] != 0xff ||
4026 bssid[4] != 0xff || bssid[5] != 0xff) {
4028 * Unknown BSSID - drop frame if this is not from
4029 * passive scanning or a beacon (at least ProbeReq
4030 * frames to other APs may be allowed through RX
4031 * filtering in the wlan hw/driver)
4033 if ((type != WLAN_FC_TYPE_MGMT ||
4034 stype != WLAN_FC_STYPE_BEACON))
4037 broadcast_bssid = 1;
4041 case ieee80211_msg_normal:
4042 /* continue processing */
4044 case ieee80211_msg_tx_callback_ack:
4045 handle_tx_callback(hapd, buf, data_len, 1);
4047 case ieee80211_msg_tx_callback_fail:
4048 handle_tx_callback(hapd, buf, data_len, 0);
4053 case WLAN_FC_TYPE_MGMT:
4054 if (stype != WLAN_FC_STYPE_BEACON &&
4055 stype != WLAN_FC_STYPE_PROBE_REQ)
4056 wpa_printf(MSG_MSGDUMP, "MGMT");
4057 if (broadcast_bssid) {
4058 for (i = 0; i < iface->num_bss; i++)
4059 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
4062 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
4064 case WLAN_FC_TYPE_CTRL:
4065 /* can only get here with PS-Poll frames */
4066 wpa_printf(MSG_DEBUG, "CTRL");
4067 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
4069 case WLAN_FC_TYPE_DATA:
4070 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
4076 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4078 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4079 struct sockaddr_ll lladdr;
4080 unsigned char buf[3000];
4082 socklen_t fromlen = sizeof(lladdr);
4084 len = recvfrom(sock, buf, sizeof(buf), 0,
4085 (struct sockaddr *)&lladdr, &fromlen);
4091 if (have_ifidx(drv, lladdr.sll_ifindex)) {
4092 struct hostapd_data *hapd;
4093 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
4096 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
4101 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
4103 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4105 unsigned char buf[3000];
4106 struct hostapd_data *hapd = drv->hapd;
4107 struct ieee80211_radiotap_iterator iter;
4109 struct hostapd_frame_info hfi;
4110 int injected = 0, failed = 0, msg_type, rxflags = 0;
4112 len = recv(sock, buf, sizeof(buf), 0);
4118 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
4119 printf("received invalid radiotap frame\n");
4123 memset(&hfi, 0, sizeof(hfi));
4126 ret = ieee80211_radiotap_iterator_next(&iter);
4130 printf("received invalid radiotap frame (%d)\n", ret);
4133 switch (iter.this_arg_index) {
4134 case IEEE80211_RADIOTAP_FLAGS:
4135 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
4138 case IEEE80211_RADIOTAP_RX_FLAGS:
4141 case IEEE80211_RADIOTAP_TX_FLAGS:
4143 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
4144 IEEE80211_RADIOTAP_F_TX_FAIL;
4146 case IEEE80211_RADIOTAP_DATA_RETRIES:
4148 case IEEE80211_RADIOTAP_CHANNEL:
4149 /* TODO convert from freq/flags to channel number
4154 case IEEE80211_RADIOTAP_RATE:
4155 hfi.datarate = *iter.this_arg * 5;
4157 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
4158 hfi.ssi_signal = *iter.this_arg;
4163 if (rxflags && injected)
4167 msg_type = ieee80211_msg_normal;
4169 msg_type = ieee80211_msg_tx_callback_fail;
4171 msg_type = ieee80211_msg_tx_callback_ack;
4173 handle_frame(drv, hapd->iface, buf + iter.max_length,
4174 len - iter.max_length, &hfi, msg_type);
4179 * we post-process the filter code later and rewrite
4180 * this to the offset to the last instruction
4185 static struct sock_filter msock_filter_insns[] = {
4187 * do a little-endian load of the radiotap length field
4189 /* load lower byte into A */
4190 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
4191 /* put it into X (== index register) */
4192 BPF_STMT(BPF_MISC| BPF_TAX, 0),
4193 /* load upper byte into A */
4194 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
4195 /* left-shift it by 8 */
4196 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
4198 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
4199 /* put result into X */
4200 BPF_STMT(BPF_MISC| BPF_TAX, 0),
4203 * Allow management frames through, this also gives us those
4204 * management frames that we sent ourselves with status
4206 /* load the lower byte of the IEEE 802.11 frame control field */
4207 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4208 /* mask off frame type and version */
4209 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
4210 /* accept frame if it's both 0, fall through otherwise */
4211 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
4214 * TODO: add a bit to radiotap RX flags that indicates
4215 * that the sending station is not associated, then
4216 * add a filter here that filters on our DA and that flag
4217 * to allow us to deauth frames to that bad station.
4219 * Not a regression -- we didn't do it before either.
4224 * drop non-data frames, WDS frames
4226 /* load the lower byte of the frame control field */
4227 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4228 /* mask off QoS bit */
4229 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
4230 /* drop non-data frames */
4231 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
4232 /* load the upper byte of the frame control field */
4233 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4234 /* mask off toDS/fromDS */
4235 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
4236 /* drop WDS frames */
4237 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
4241 * add header length to index
4243 /* load the lower byte of the frame control field */
4244 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4245 /* mask off QoS bit */
4246 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
4247 /* right shift it by 6 to give 0 or 2 */
4248 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
4249 /* add data frame header length */
4250 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
4251 /* add index, was start of 802.11 header */
4252 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
4253 /* move to index, now start of LL header */
4254 BPF_STMT(BPF_MISC | BPF_TAX, 0),
4257 * Accept empty data frames, we use those for
4260 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
4261 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
4264 * Accept EAPOL frames
4266 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
4267 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
4268 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
4269 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
4271 /* keep these last two statements or change the code below */
4272 /* return 0 == "DROP" */
4273 BPF_STMT(BPF_RET | BPF_K, 0),
4274 /* return ~0 == "keep all" */
4275 BPF_STMT(BPF_RET | BPF_K, ~0),
4278 static struct sock_fprog msock_filter = {
4279 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
4280 .filter = msock_filter_insns,
4284 static int add_monitor_filter(int s)
4288 /* rewrite all PASS/FAIL jump offsets */
4289 for (idx = 0; idx < msock_filter.len; idx++) {
4290 struct sock_filter *insn = &msock_filter_insns[idx];
4292 if (BPF_CLASS(insn->code) == BPF_JMP) {
4293 if (insn->code == (BPF_JMP|BPF_JA)) {
4294 if (insn->k == PASS)
4295 insn->k = msock_filter.len - idx - 2;
4296 else if (insn->k == FAIL)
4297 insn->k = msock_filter.len - idx - 3;
4300 if (insn->jt == PASS)
4301 insn->jt = msock_filter.len - idx - 2;
4302 else if (insn->jt == FAIL)
4303 insn->jt = msock_filter.len - idx - 3;
4305 if (insn->jf == PASS)
4306 insn->jf = msock_filter.len - idx - 2;
4307 else if (insn->jf == FAIL)
4308 insn->jf = msock_filter.len - idx - 3;
4312 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
4313 &msock_filter, sizeof(msock_filter))) {
4314 perror("SO_ATTACH_FILTER");
4322 static int nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
4325 struct sockaddr_ll ll;
4329 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
4330 buf[IFNAMSIZ - 1] = '\0';
4332 drv->monitor_ifidx =
4333 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
4335 if (drv->monitor_ifidx < 0)
4338 if (hostapd_set_iface_flags(drv, buf, 1))
4341 memset(&ll, 0, sizeof(ll));
4342 ll.sll_family = AF_PACKET;
4343 ll.sll_ifindex = drv->monitor_ifidx;
4344 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
4345 if (drv->monitor_sock < 0) {
4346 perror("socket[PF_PACKET,SOCK_RAW]");
4350 if (add_monitor_filter(drv->monitor_sock)) {
4351 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
4352 "interface; do filtering in user space");
4353 /* This works, but will cost in performance. */
4356 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
4358 perror("monitor socket bind");
4362 optlen = sizeof(optval);
4365 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
4366 perror("Failed to set socket priority");
4370 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
4372 printf("Could not register monitor read socket\n");
4378 nl80211_remove_iface(drv, drv->monitor_ifidx);
4383 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
4389 msg = nlmsg_alloc();
4393 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4394 0, NL80211_CMD_SET_INTERFACE, 0);
4395 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4396 if_nametoindex(ifname));
4397 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4399 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4403 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
4409 #ifdef CONFIG_IEEE80211N
4410 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
4411 int freq, u8 *ie, size_t ie_len)
4413 struct ieee802_11_elems elems;
4414 int ht, pri_chan = 0, sec_chan = 0;
4415 struct ieee80211_ht_operation *oper;
4416 struct hostapd_neighbor_bss *nnei;
4418 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
4419 ht = elems.ht_capabilities || elems.ht_operation;
4420 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
4421 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
4422 pri_chan = oper->control_chan;
4423 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
4424 if (oper->ht_param &
4425 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
4426 sec_chan = pri_chan + 4;
4427 else if (oper->ht_param &
4428 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
4429 sec_chan = pri_chan - 4;
4433 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
4434 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
4435 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
4437 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
4438 sizeof(struct hostapd_neighbor_bss));
4441 drv->neighbors = nnei;
4442 nnei = &nnei[drv->num_neighbors];
4443 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
4446 nnei->pri_chan = pri_chan;
4447 nnei->sec_chan = sec_chan;
4448 drv->num_neighbors++;
4452 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
4454 int divi = 1000000, i;
4456 if (iwe->u.freq.e == 0) {
4458 * Some drivers do not report frequency, but a channel.
4459 * Try to map this to frequency by assuming they are using
4460 * IEEE 802.11b/g. But don't overwrite a previously parsed
4461 * frequency if the driver sends both frequency and channel,
4462 * since the driver may be sending an A-band channel that we
4463 * don't handle here.
4469 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
4470 *freq = 2407 + 5 * iwe->u.freq.m;
4472 } else if (iwe->u.freq.m == 14) {
4478 if (iwe->u.freq.e > 6) {
4479 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
4480 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
4484 for (i = 0; i < iwe->u.freq.e; i++)
4486 *freq = iwe->u.freq.m / divi;
4491 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
4496 struct iw_event iwe_buf, *iwe = &iwe_buf;
4497 char *pos, *end, *custom;
4506 pos = (char *) res_buf;
4507 end = (char *) res_buf + len;
4509 while (pos + IW_EV_LCP_LEN <= end) {
4510 /* Event data may be unaligned, so make a local, aligned copy
4511 * before processing. */
4512 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4513 if (iwe->len <= IW_EV_LCP_LEN)
4516 custom = pos + IW_EV_POINT_LEN;
4517 if (iwe->cmd == IWEVGENIE) {
4518 /* WE-19 removed the pointer from struct iw_point */
4519 char *dpos = (char *) &iwe_buf.u.data.length;
4520 int dlen = dpos - (char *) &iwe_buf;
4521 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
4522 sizeof(struct iw_event) - dlen);
4524 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
4525 custom += IW_EV_POINT_OFF;
4531 i802_add_neighbor(drv, bssid, freq, ie,
4534 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
4540 i802_get_scan_freq(iwe, &freq);
4543 if (custom + iwe->u.data.length > end) {
4544 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4548 ie_len = iwe->u.data.length;
4556 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4562 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4569 res_buf_len = IW_SCAN_MAX_DATA;
4571 res_buf = os_malloc(res_buf_len);
4572 if (res_buf == NULL)
4574 os_memset(&iwr, 0, sizeof(iwr));
4575 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4576 iwr.u.data.pointer = res_buf;
4577 iwr.u.data.length = res_buf_len;
4579 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4582 if (errno == E2BIG && res_buf_len < 65535) {
4586 if (res_buf_len > 65535)
4587 res_buf_len = 65535; /* 16-bit length field */
4588 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4589 "trying larger buffer (%lu bytes)",
4590 (unsigned long) res_buf_len);
4592 perror("ioctl[SIOCGIWSCAN]");
4598 if (iwr.u.data.length > res_buf_len) {
4603 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4610 static int i802_is_event_wireless_scan_complete(char *data, int len)
4612 struct iw_event iwe_buf, *iwe = &iwe_buf;
4618 while (pos + IW_EV_LCP_LEN <= end) {
4619 /* Event data may be unaligned, so make a local, aligned copy
4620 * before processing. */
4621 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4622 if (iwe->cmd == SIOCGIWSCAN)
4632 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4634 struct ifinfomsg *ifi;
4635 int attrlen, _nlmsg_len, rta_len;
4636 struct rtattr *attr;
4638 if (len < (int) sizeof(*ifi))
4641 ifi = NLMSG_DATA(h);
4643 if (ifindex != ifi->ifi_index)
4644 return 0; /* event for foreign ifindex */
4646 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4648 attrlen = h->nlmsg_len - _nlmsg_len;
4652 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4654 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4655 while (RTA_OK(attr, attrlen)) {
4656 if (attr->rta_type == IFLA_WIRELESS &&
4657 i802_is_event_wireless_scan_complete(
4658 ((char *) attr) + rta_len,
4659 attr->rta_len - rta_len))
4661 attr = RTA_NEXT(attr, attrlen);
4668 static int i802_is_scan_complete(int s, int ifindex)
4674 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4676 perror("recv(netlink)");
4680 h = (struct nlmsghdr *) buf;
4681 while (left >= (int) sizeof(*h)) {
4685 plen = len - sizeof(*h);
4686 if (len > left || plen < 0) {
4687 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4688 "len=%d left=%d plen=%d",
4693 switch (h->nlmsg_type) {
4695 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4700 len = NLMSG_ALIGN(len);
4702 h = (struct nlmsghdr *) ((char *) h + len);
4709 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4712 int s, res, ifindex;
4713 struct sockaddr_nl local;
4718 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4719 "starting HT 20/40 MHz BSS");
4721 /* Request a new scan */
4722 /* TODO: would be enough to scan the selected band */
4723 os_memset(&iwr, 0, sizeof(iwr));
4724 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4725 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4726 perror("ioctl[SIOCSIWSCAN]");
4730 ifindex = if_nametoindex(drv->ifname);
4732 /* Wait for scan completion event or timeout */
4733 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4735 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4739 os_memset(&local, 0, sizeof(local));
4740 local.nl_family = AF_NETLINK;
4741 local.nl_groups = RTMGRP_LINK;
4742 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4743 perror("bind(netlink)");
4749 end += 30; /* Wait at most 30 seconds for scan results */
4752 tv.tv_sec = end > now ? end - now : 0;
4756 res = select(s + 1, &rfds, NULL, NULL, &tv);
4759 /* Assume results are ready after 10 seconds wait */
4763 if (i802_is_scan_complete(s, ifindex)) {
4764 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4769 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4770 /* Assume results are ready to be read now */
4777 return i802_get_ht_scan_res(drv);
4779 #endif /* CONFIG_IEEE80211N */
4782 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4786 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4787 if (drv->ioctl_sock < 0) {
4788 perror("socket[PF_INET,SOCK_DGRAM]");
4792 /* start listening for EAPOL on the default AP interface */
4793 add_ifidx(drv, if_nametoindex(drv->ifname));
4795 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4799 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4800 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4801 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4803 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4804 perror("ioctl(SIOCSIFHWADDR)");
4810 * initialise generic netlink and nl80211
4812 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4814 printf("Failed to allocate netlink callbacks.\n");
4818 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4819 if (!drv->nl_handle) {
4820 printf("Failed to allocate netlink handle.\n");
4824 if (genl_connect(drv->nl_handle)) {
4825 printf("Failed to connect to generic netlink.\n");
4829 #ifdef CONFIG_LIBNL20
4830 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4831 printf("Failed to allocate generic netlink cache.\n");
4834 #else /* CONFIG_LIBNL20 */
4835 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4836 if (!drv->nl_cache) {
4837 printf("Failed to allocate generic netlink cache.\n");
4840 #endif /* CONFIG_LIBNL20 */
4842 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4843 if (!drv->nl80211) {
4844 printf("nl80211 not found.\n");
4848 #ifdef CONFIG_IEEE80211N
4849 if (drv->ht_40mhz_scan) {
4850 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4851 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4852 i802_ht_scan(drv) ||
4853 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4854 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4855 "HT 40 MHz operations");
4859 #endif /* CONFIG_IEEE80211N */
4861 /* Initialise a monitor interface */
4862 if (nl80211_create_monitor_interface(drv))
4865 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4868 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4871 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4872 if (drv->eapol_sock < 0) {
4873 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4877 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4879 printf("Could not register read socket for eapol\n");
4883 memset(&ifr, 0, sizeof(ifr));
4884 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4885 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4886 perror("ioctl(SIOCGIFHWADDR)");
4890 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4891 printf("Invalid HW-addr family 0x%04x\n",
4892 ifr.ifr_hwaddr.sa_family);
4895 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4900 nl80211_remove_iface(drv, drv->monitor_ifidx);
4905 static int i802_get_inact_sec(void *priv, const u8 *addr)
4907 struct hostap_sta_driver_data data;
4910 data.inactive_msec = (unsigned long) -1;
4911 ret = i802_read_sta_data(priv, &data, addr);
4912 if (ret || data.inactive_msec == (unsigned long) -1)
4914 return data.inactive_msec / 1000;
4918 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4928 hostapd_wireless_event_wireless_custom(struct wpa_driver_nl80211_data *drv,
4931 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
4933 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
4936 pos = strstr(custom, "addr=");
4938 wpa_printf(MSG_DEBUG,
4939 "MLME-MICHAELMICFAILURE.indication "
4940 "without sender address ignored");
4944 if (hwaddr_aton(pos, addr) == 0) {
4945 hostapd_michael_mic_failure(drv->hapd, addr);
4947 wpa_printf(MSG_DEBUG,
4948 "MLME-MICHAELMICFAILURE.indication "
4949 "with invalid MAC address");
4955 static void hostapd_wireless_event_wireless(struct wpa_driver_nl80211_data *drv,
4956 char *data, int len)
4958 struct iw_event iwe_buf, *iwe = &iwe_buf;
4959 char *pos, *end, *custom, *buf;
4964 while (pos + IW_EV_LCP_LEN <= end) {
4965 /* Event data may be unaligned, so make a local, aligned copy
4966 * before processing. */
4967 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4968 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
4969 iwe->cmd, iwe->len);
4970 if (iwe->len <= IW_EV_LCP_LEN)
4973 custom = pos + IW_EV_POINT_LEN;
4974 if (drv->we_version > 18 &&
4975 (iwe->cmd == IWEVMICHAELMICFAILURE ||
4976 iwe->cmd == IWEVCUSTOM)) {
4977 /* WE-19 removed the pointer from struct iw_point */
4978 char *dpos = (char *) &iwe_buf.u.data.length;
4979 int dlen = dpos - (char *) &iwe_buf;
4980 memcpy(dpos, pos + IW_EV_LCP_LEN,
4981 sizeof(struct iw_event) - dlen);
4983 memcpy(&iwe_buf, pos, sizeof(struct iw_event));
4984 custom += IW_EV_POINT_OFF;
4989 if (custom + iwe->u.data.length > end)
4991 buf = malloc(iwe->u.data.length + 1);
4994 memcpy(buf, custom, iwe->u.data.length);
4995 buf[iwe->u.data.length] = '\0';
4996 hostapd_wireless_event_wireless_custom(drv, buf);
5006 static void hostapd_wireless_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
5007 struct nlmsghdr *h, int len)
5009 struct ifinfomsg *ifi;
5010 int attrlen, _nlmsg_len, rta_len;
5011 struct rtattr *attr;
5013 if (len < (int) sizeof(*ifi))
5016 ifi = NLMSG_DATA(h);
5018 /* TODO: use ifi->ifi_index to filter out wireless events from other
5021 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
5023 attrlen = h->nlmsg_len - _nlmsg_len;
5027 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
5029 rta_len = RTA_ALIGN(sizeof(struct rtattr));
5030 while (RTA_OK(attr, attrlen)) {
5031 if (attr->rta_type == IFLA_WIRELESS) {
5032 hostapd_wireless_event_wireless(
5033 drv, ((char *) attr) + rta_len,
5034 attr->rta_len - rta_len);
5036 attr = RTA_NEXT(attr, attrlen);
5041 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
5046 struct sockaddr_nl from;
5049 struct wpa_driver_nl80211_data *drv = eloop_ctx;
5051 fromlen = sizeof(from);
5052 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
5053 (struct sockaddr *) &from, &fromlen);
5055 if (errno != EINTR && errno != EAGAIN)
5056 perror("recvfrom(netlink)");
5060 h = (struct nlmsghdr *) buf;
5061 while (left >= (int) sizeof(*h)) {
5065 plen = len - sizeof(*h);
5066 if (len > left || plen < 0) {
5067 printf("Malformed netlink message: "
5068 "len=%d left=%d plen=%d\n",
5073 switch (h->nlmsg_type) {
5075 hostapd_wireless_event_rtm_newlink(drv, h, plen);
5079 len = NLMSG_ALIGN(len);
5081 h = (struct nlmsghdr *) ((char *) h + len);
5085 printf("%d extra bytes in the end of netlink message\n", left);
5090 static int hostap_get_we_version(struct wpa_driver_nl80211_data *drv)
5092 struct iw_range *range;
5097 drv->we_version = 0;
5100 * Use larger buffer than struct iw_range in order to allow the
5101 * structure to grow in the future.
5103 buflen = sizeof(struct iw_range) + 500;
5104 range = os_zalloc(buflen);
5108 memset(&iwr, 0, sizeof(iwr));
5109 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
5110 iwr.u.data.pointer = (caddr_t) range;
5111 iwr.u.data.length = buflen;
5113 minlen = ((char *) &range->enc_capa) - (char *) range +
5114 sizeof(range->enc_capa);
5116 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
5117 perror("ioctl[SIOCGIWRANGE]");
5120 } else if (iwr.u.data.length >= minlen &&
5121 range->we_version_compiled >= 18) {
5122 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
5123 "WE(source)=%d enc_capa=0x%x",
5124 range->we_version_compiled,
5125 range->we_version_source,
5127 drv->we_version = range->we_version_compiled;
5135 static int i802_wireless_event_init(struct wpa_driver_nl80211_data *drv)
5138 struct sockaddr_nl local;
5140 hostap_get_we_version(drv);
5142 drv->wext_sock = -1;
5144 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
5146 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
5150 memset(&local, 0, sizeof(local));
5151 local.nl_family = AF_NETLINK;
5152 local.nl_groups = RTMGRP_LINK;
5153 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
5154 perror("bind(netlink)");
5159 eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
5167 static void i802_wireless_event_deinit(struct wpa_driver_nl80211_data *drv)
5169 if (drv->wext_sock < 0)
5171 eloop_unregister_read_sock(drv->wext_sock);
5172 close(drv->wext_sock);
5176 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
5178 struct wpa_driver_nl80211_data *drv = priv;
5179 struct ieee80211_mgmt mgmt;
5181 memset(&mgmt, 0, sizeof(mgmt));
5182 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5183 WLAN_FC_STYPE_DEAUTH);
5184 memcpy(mgmt.da, addr, ETH_ALEN);
5185 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
5186 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
5187 mgmt.u.deauth.reason_code = host_to_le16(reason);
5188 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
5189 sizeof(mgmt.u.deauth), 0);
5193 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
5195 struct wpa_driver_nl80211_data *drv = priv;
5196 struct ieee80211_mgmt mgmt;
5198 memset(&mgmt, 0, sizeof(mgmt));
5199 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5200 WLAN_FC_STYPE_DISASSOC);
5201 memcpy(mgmt.da, addr, ETH_ALEN);
5202 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
5203 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
5204 mgmt.u.disassoc.reason_code = host_to_le16(reason);
5205 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
5206 sizeof(mgmt.u.disassoc), 0);
5210 static const struct hostapd_neighbor_bss *
5211 i802_get_neighbor_bss(void *priv, size_t *num)
5213 struct wpa_driver_nl80211_data *drv = priv;
5214 *num = drv->num_neighbors;
5215 return drv->neighbors;
5219 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
5221 struct wpa_driver_nl80211_data *drv;
5224 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
5226 printf("Could not allocate memory for i802 driver data\n");
5231 memcpy(drv->ifname, hapd->conf->iface, sizeof(drv->ifname));
5232 memcpy(drv->bss.ifname, hapd->conf->iface, sizeof(drv->bss.ifname));
5233 drv->ifindex = if_nametoindex(drv->ifname);
5235 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
5236 drv->if_indices = drv->default_if_indices;
5237 for (i = 0; i < hapd->iface->num_bss; i++) {
5238 struct hostapd_data *bss = hapd->iface->bss[i];
5239 if (bss->conf->bridge)
5240 add_ifidx(drv, if_nametoindex(bss->conf->bridge));
5242 drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
5244 if (i802_init_sockets(drv, bssid))
5247 if (i802_wireless_event_init(drv))
5258 static void *i802_init(struct hostapd_data *hapd)
5260 return i802_init_bssid(hapd, NULL);
5264 static void i802_deinit(void *priv)
5266 struct wpa_driver_nl80211_data *drv = priv;
5267 struct i802_bss *bss, *prev;
5269 i802_wireless_event_deinit(drv);
5271 if (drv->last_freq_ht) {
5272 /* Clear HT flags from the driver */
5273 struct hostapd_freq_params freq;
5274 os_memset(&freq, 0, sizeof(freq));
5275 freq.freq = drv->last_freq;
5276 i802_set_freq(priv, &freq);
5279 i802_del_beacon(drv);
5281 /* remove monitor interface */
5282 nl80211_remove_iface(drv, drv->monitor_ifidx);
5284 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
5286 if (drv->monitor_sock >= 0) {
5287 eloop_unregister_read_sock(drv->monitor_sock);
5288 close(drv->monitor_sock);
5290 if (drv->ioctl_sock >= 0)
5291 close(drv->ioctl_sock);
5292 if (drv->eapol_sock >= 0) {
5293 eloop_unregister_read_sock(drv->eapol_sock);
5294 close(drv->eapol_sock);
5297 genl_family_put(drv->nl80211);
5298 nl_cache_free(drv->nl_cache);
5299 nl_handle_destroy(drv->nl_handle);
5300 nl_cb_put(drv->nl_cb);
5302 if (drv->if_indices != drv->default_if_indices)
5303 free(drv->if_indices);
5305 os_free(drv->neighbors);
5307 bss = drv->bss.next;
5317 #endif /* HOSTAPD */
5320 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5322 .desc = "Linux nl80211/cfg80211",
5323 .get_bssid = wpa_driver_nl80211_get_bssid,
5324 .get_ssid = wpa_driver_nl80211_get_ssid,
5325 .set_key = wpa_driver_nl80211_set_key,
5326 .scan2 = wpa_driver_nl80211_scan,
5327 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5328 .deauthenticate = wpa_driver_nl80211_deauthenticate,
5329 .disassociate = wpa_driver_nl80211_disassociate,
5330 .authenticate = wpa_driver_nl80211_authenticate,
5331 .associate = wpa_driver_nl80211_associate,
5332 .init = wpa_driver_nl80211_init,
5333 .deinit = wpa_driver_nl80211_deinit,
5334 .get_capa = wpa_driver_nl80211_get_capa,
5335 .set_operstate = wpa_driver_nl80211_set_operstate,
5336 .set_country = wpa_driver_nl80211_set_country,
5338 .set_beacon = wpa_driver_nl80211_set_beacon,
5339 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
5340 .send_mlme = wpa_driver_nl80211_send_mlme,
5341 #endif /* CONFIG_AP */
5342 #if defined(CONFIG_AP) || defined(HOSTAPD)
5343 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5344 #endif /* CONFIG_AP || HOSTAPD */
5346 .hapd_init = i802_init,
5347 .init_bssid = i802_init_bssid,
5348 .hapd_deinit = i802_deinit,
5349 .hapd_set_key = i802_set_key,
5350 .get_seqnum = i802_get_seqnum,
5351 .flush = i802_flush,
5352 .read_sta_data = i802_read_sta_data,
5353 .hapd_send_eapol = i802_send_eapol,
5354 .sta_set_flags = i802_sta_set_flags,
5355 .sta_deauth = i802_sta_deauth,
5356 .sta_disassoc = i802_sta_disassoc,
5357 .sta_remove = i802_sta_remove,
5358 .send_mgmt_frame = i802_send_mgmt_frame,
5359 .sta_add = i802_sta_add,
5360 .get_inact_sec = i802_get_inact_sec,
5361 .sta_clear_stats = i802_sta_clear_stats,
5362 .set_freq = i802_set_freq,
5363 .set_rts = i802_set_rts,
5364 .set_frag = i802_set_frag,
5365 .set_retry = i802_set_retry,
5366 .set_rate_sets = i802_set_rate_sets,
5367 .hapd_set_beacon = i802_set_beacon,
5368 .hapd_set_beacon_int = i802_set_beacon_int,
5369 .set_cts_protect = i802_set_cts_protect,
5370 .set_preamble = i802_set_preamble,
5371 .set_short_slot_time = i802_set_short_slot_time,
5372 .set_tx_queue_params = i802_set_tx_queue_params,
5373 .bss_add = i802_bss_add,
5374 .bss_remove = i802_bss_remove,
5375 .if_add = i802_if_add,
5376 .if_update = i802_if_update,
5377 .if_remove = i802_if_remove,
5378 .set_sta_vlan = i802_set_sta_vlan,
5379 .hapd_set_country = i802_set_country,
5380 .get_neighbor_bss = i802_get_neighbor_bss,
5381 #endif /* HOSTAPD */