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nl80211: Fix hostapd error path
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009-2010, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <fcntl.h>
24 #include <net/if.h>
25 #include <netlink/genl/genl.h>
26 #include <netlink/genl/family.h>
27 #include <netlink/genl/ctrl.h>
28 #include <linux/rtnetlink.h>
29 #include <netpacket/packet.h>
30 #include <linux/filter.h>
31 #include "nl80211_copy.h"
32
33 #include "common.h"
34 #include "eloop.h"
35 #include "utils/list.h"
36 #include "common/ieee802_11_defs.h"
37 #include "common/ieee802_11_common.h"
38 #include "l2_packet/l2_packet.h"
39 #include "netlink.h"
40 #include "linux_ioctl.h"
41 #include "radiotap.h"
42 #include "radiotap_iter.h"
43 #include "rfkill.h"
44 #include "driver.h"
45
46 #ifdef CONFIG_LIBNL20
47 /* libnl 2.0 compatibility code */
48 #define nl_handle nl_sock
49 #define nl80211_handle_alloc nl_socket_alloc_cb
50 #define nl80211_handle_destroy nl_socket_free
51 #else
52 /*
53 * libnl 1.1 has a bug, it tries to allocate socket numbers densely
54 * but when you free a socket again it will mess up its bitmap and
55 * and use the wrong number the next time it needs a socket ID.
56 * Therefore, we wrap the handle alloc/destroy and add our own pid
57 * accounting.
58 */
59 static uint32_t port_bitmap[32] = { 0 };
60
61 static struct nl_handle *nl80211_handle_alloc(void *cb)
62 {
63 struct nl_handle *handle;
64 uint32_t pid = getpid() & 0x3FFFFF;
65 int i;
66
67 handle = nl_handle_alloc_cb(cb);
68
69 for (i = 0; i < 1024; i++) {
70 if (port_bitmap[i / 32] & (1 << (i % 32)))
71 continue;
72 port_bitmap[i / 32] |= 1 << (i % 32);
73 pid += i << 22;
74 break;
75 }
76
77 nl_socket_set_local_port(handle, pid);
78
79 return handle;
80 }
81
82 static void nl80211_handle_destroy(struct nl_handle *handle)
83 {
84 uint32_t port = nl_socket_get_local_port(handle);
85
86 port >>= 22;
87 port_bitmap[port / 32] &= ~(1 << (port % 32));
88
89 nl_handle_destroy(handle);
90 }
91
92 static inline int __genl_ctrl_alloc_cache(struct nl_handle *h,
93 struct nl_cache **cache)
94 {
95 struct nl_cache *tmp = genl_ctrl_alloc_cache(h);
96 if (!tmp)
97 return -ENOMEM;
98 *cache = tmp;
99 return 0;
100 }
101 #define genl_ctrl_alloc_cache __genl_ctrl_alloc_cache
102 #endif /* CONFIG_LIBNL20 */
103
104
105 #ifndef IFF_LOWER_UP
106 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
107 #endif
108 #ifndef IFF_DORMANT
109 #define IFF_DORMANT 0x20000 /* driver signals dormant */
110 #endif
111
112 #ifndef IF_OPER_DORMANT
113 #define IF_OPER_DORMANT 5
114 #endif
115 #ifndef IF_OPER_UP
116 #define IF_OPER_UP 6
117 #endif
118
119 struct nl80211_global {
120 struct dl_list interfaces;
121 int if_add_ifindex;
122 struct netlink_data *netlink;
123 };
124
125 static void nl80211_global_deinit(void *priv);
126
127 struct i802_bss {
128 struct wpa_driver_nl80211_data *drv;
129 struct i802_bss *next;
130 int ifindex;
131 char ifname[IFNAMSIZ + 1];
132 char brname[IFNAMSIZ];
133 unsigned int beacon_set:1;
134 unsigned int added_if_into_bridge:1;
135 unsigned int added_bridge:1;
136 };
137
138 struct wpa_driver_nl80211_data {
139 struct nl80211_global *global;
140 struct dl_list list;
141 u8 addr[ETH_ALEN];
142 char phyname[32];
143 void *ctx;
144 int ioctl_sock; /* socket for ioctl() use */
145 int ifindex;
146 int if_removed;
147 int if_disabled;
148 int ignore_if_down_event;
149 struct rfkill_data *rfkill;
150 struct wpa_driver_capa capa;
151 int has_capability;
152
153 int operstate;
154
155 int scan_complete_events;
156
157 struct nl_handle *nl_handle;
158 struct nl_handle *nl_handle_event;
159 struct nl_handle *nl_handle_preq;
160 struct nl_cache *nl_cache;
161 struct nl_cache *nl_cache_event;
162 struct nl_cache *nl_cache_preq;
163 struct nl_cb *nl_cb;
164 struct genl_family *nl80211;
165
166 u8 auth_bssid[ETH_ALEN];
167 u8 bssid[ETH_ALEN];
168 int associated;
169 u8 ssid[32];
170 size_t ssid_len;
171 enum nl80211_iftype nlmode;
172 enum nl80211_iftype ap_scan_as_station;
173 unsigned int assoc_freq;
174
175 int monitor_sock;
176 int monitor_ifidx;
177 int no_monitor_iface_capab;
178 int disable_11b_rates;
179
180 unsigned int pending_remain_on_chan:1;
181
182 u64 remain_on_chan_cookie;
183 u64 send_action_cookie;
184
185 unsigned int last_mgmt_freq;
186 unsigned int ap_oper_freq;
187
188 struct wpa_driver_scan_filter *filter_ssids;
189 size_t num_filter_ssids;
190
191 struct i802_bss first_bss;
192
193 #ifdef CONFIG_AP
194 struct l2_packet_data *l2;
195 #endif /* CONFIG_AP */
196
197 #ifdef HOSTAPD
198 int eapol_sock; /* socket for EAPOL frames */
199
200 int default_if_indices[16];
201 int *if_indices;
202 int num_if_indices;
203
204 int last_freq;
205 int last_freq_ht;
206 #endif /* HOSTAPD */
207 };
208
209
210 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
211 void *timeout_ctx);
212 static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
213 enum nl80211_iftype nlmode);
214 static int
215 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
216 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
217 const u8 *addr, int cmd, u16 reason_code,
218 int local_state_change);
219 static void nl80211_remove_monitor_interface(
220 struct wpa_driver_nl80211_data *drv);
221 static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
222 unsigned int freq, unsigned int wait,
223 const u8 *buf, size_t buf_len, u64 *cookie);
224 static int wpa_driver_nl80211_probe_req_report(void *priv, int report);
225
226 #ifdef HOSTAPD
227 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
228 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
229 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
230 static int wpa_driver_nl80211_if_remove(void *priv,
231 enum wpa_driver_if_type type,
232 const char *ifname);
233 #else /* HOSTAPD */
234 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
235 {
236 return 0;
237 }
238 #endif /* HOSTAPD */
239
240 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
241 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
242 int ifindex, int disabled);
243
244 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv);
245
246
247 static int is_ap_interface(enum nl80211_iftype nlmode)
248 {
249 return (nlmode == NL80211_IFTYPE_AP ||
250 nlmode == NL80211_IFTYPE_P2P_GO);
251 }
252
253
254 static int is_sta_interface(enum nl80211_iftype nlmode)
255 {
256 return (nlmode == NL80211_IFTYPE_STATION ||
257 nlmode == NL80211_IFTYPE_P2P_CLIENT);
258 }
259
260
261 struct nl80211_bss_info_arg {
262 struct wpa_driver_nl80211_data *drv;
263 struct wpa_scan_results *res;
264 unsigned int assoc_freq;
265 u8 assoc_bssid[ETH_ALEN];
266 };
267
268 static int bss_info_handler(struct nl_msg *msg, void *arg);
269
270
271 /* nl80211 code */
272 static int ack_handler(struct nl_msg *msg, void *arg)
273 {
274 int *err = arg;
275 *err = 0;
276 return NL_STOP;
277 }
278
279 static int finish_handler(struct nl_msg *msg, void *arg)
280 {
281 int *ret = arg;
282 *ret = 0;
283 return NL_SKIP;
284 }
285
286 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
287 void *arg)
288 {
289 int *ret = arg;
290 *ret = err->error;
291 return NL_SKIP;
292 }
293
294
295 static int no_seq_check(struct nl_msg *msg, void *arg)
296 {
297 return NL_OK;
298 }
299
300
301 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
302 struct nl_handle *nl_handle, struct nl_msg *msg,
303 int (*valid_handler)(struct nl_msg *, void *),
304 void *valid_data)
305 {
306 struct nl_cb *cb;
307 int err = -ENOMEM;
308
309 cb = nl_cb_clone(drv->nl_cb);
310 if (!cb)
311 goto out;
312
313 err = nl_send_auto_complete(nl_handle, msg);
314 if (err < 0)
315 goto out;
316
317 err = 1;
318
319 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
320 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
321 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
322
323 if (valid_handler)
324 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
325 valid_handler, valid_data);
326
327 while (err > 0)
328 nl_recvmsgs(nl_handle, cb);
329 out:
330 nl_cb_put(cb);
331 nlmsg_free(msg);
332 return err;
333 }
334
335
336 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
337 struct nl_msg *msg,
338 int (*valid_handler)(struct nl_msg *, void *),
339 void *valid_data)
340 {
341 return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
342 valid_data);
343 }
344
345
346 struct family_data {
347 const char *group;
348 int id;
349 };
350
351
352 static int family_handler(struct nl_msg *msg, void *arg)
353 {
354 struct family_data *res = arg;
355 struct nlattr *tb[CTRL_ATTR_MAX + 1];
356 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
357 struct nlattr *mcgrp;
358 int i;
359
360 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
361 genlmsg_attrlen(gnlh, 0), NULL);
362 if (!tb[CTRL_ATTR_MCAST_GROUPS])
363 return NL_SKIP;
364
365 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
366 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
367 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
368 nla_len(mcgrp), NULL);
369 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
370 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
371 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
372 res->group,
373 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
374 continue;
375 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
376 break;
377 };
378
379 return NL_SKIP;
380 }
381
382
383 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
384 const char *family, const char *group)
385 {
386 struct nl_msg *msg;
387 int ret = -1;
388 struct family_data res = { group, -ENOENT };
389
390 msg = nlmsg_alloc();
391 if (!msg)
392 return -ENOMEM;
393 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
394 0, 0, CTRL_CMD_GETFAMILY, 0);
395 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
396
397 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
398 msg = NULL;
399 if (ret == 0)
400 ret = res.id;
401
402 nla_put_failure:
403 nlmsg_free(msg);
404 return ret;
405 }
406
407
408 static void * nl80211_cmd(struct wpa_driver_nl80211_data *drv,
409 struct nl_msg *msg, int flags, uint8_t cmd)
410 {
411 return genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
412 flags, cmd, 0);
413 }
414
415
416 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
417 {
418 struct i802_bss *bss = priv;
419 struct wpa_driver_nl80211_data *drv = bss->drv;
420 if (!drv->associated)
421 return -1;
422 os_memcpy(bssid, drv->bssid, ETH_ALEN);
423 return 0;
424 }
425
426
427 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
428 {
429 struct i802_bss *bss = priv;
430 struct wpa_driver_nl80211_data *drv = bss->drv;
431 if (!drv->associated)
432 return -1;
433 os_memcpy(ssid, drv->ssid, drv->ssid_len);
434 return drv->ssid_len;
435 }
436
437
438 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
439 char *buf, size_t len, int del)
440 {
441 union wpa_event_data event;
442
443 os_memset(&event, 0, sizeof(event));
444 if (len > sizeof(event.interface_status.ifname))
445 len = sizeof(event.interface_status.ifname) - 1;
446 os_memcpy(event.interface_status.ifname, buf, len);
447 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
448 EVENT_INTERFACE_ADDED;
449
450 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
451 del ? "DEL" : "NEW",
452 event.interface_status.ifname,
453 del ? "removed" : "added");
454
455 if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
456 if (del)
457 drv->if_removed = 1;
458 else
459 drv->if_removed = 0;
460 }
461
462 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
463 }
464
465
466 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
467 u8 *buf, size_t len)
468 {
469 int attrlen, rta_len;
470 struct rtattr *attr;
471
472 attrlen = len;
473 attr = (struct rtattr *) buf;
474
475 rta_len = RTA_ALIGN(sizeof(struct rtattr));
476 while (RTA_OK(attr, attrlen)) {
477 if (attr->rta_type == IFLA_IFNAME) {
478 if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
479 == 0)
480 return 1;
481 else
482 break;
483 }
484 attr = RTA_NEXT(attr, attrlen);
485 }
486
487 return 0;
488 }
489
490
491 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
492 int ifindex, u8 *buf, size_t len)
493 {
494 if (drv->ifindex == ifindex)
495 return 1;
496
497 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
498 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
499 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
500 "interface");
501 wpa_driver_nl80211_finish_drv_init(drv);
502 return 1;
503 }
504
505 return 0;
506 }
507
508
509 static struct wpa_driver_nl80211_data *
510 nl80211_find_drv(struct nl80211_global *global, int idx, u8 *buf, size_t len)
511 {
512 struct wpa_driver_nl80211_data *drv;
513 dl_list_for_each(drv, &global->interfaces,
514 struct wpa_driver_nl80211_data, list) {
515 if (wpa_driver_nl80211_own_ifindex(drv, idx, buf, len) ||
516 have_ifidx(drv, idx))
517 return drv;
518 }
519 return NULL;
520 }
521
522
523 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
524 struct ifinfomsg *ifi,
525 u8 *buf, size_t len)
526 {
527 struct nl80211_global *global = ctx;
528 struct wpa_driver_nl80211_data *drv;
529 int attrlen, rta_len;
530 struct rtattr *attr;
531 u32 brid = 0;
532
533 drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
534 if (!drv) {
535 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
536 "ifindex %d", ifi->ifi_index);
537 return;
538 }
539
540 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
541 "(%s%s%s%s)",
542 drv->operstate, ifi->ifi_flags,
543 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
544 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
545 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
546 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
547
548 if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
549 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
550 if (drv->ignore_if_down_event) {
551 wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down "
552 "event generated by mode change");
553 drv->ignore_if_down_event = 0;
554 } else {
555 drv->if_disabled = 1;
556 wpa_supplicant_event(drv->ctx,
557 EVENT_INTERFACE_DISABLED, NULL);
558 }
559 }
560
561 if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
562 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
563 drv->if_disabled = 0;
564 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
565 }
566
567 /*
568 * Some drivers send the association event before the operup event--in
569 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
570 * fails. This will hit us when wpa_supplicant does not need to do
571 * IEEE 802.1X authentication
572 */
573 if (drv->operstate == 1 &&
574 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
575 !(ifi->ifi_flags & IFF_RUNNING))
576 netlink_send_oper_ifla(drv->global->netlink, drv->ifindex,
577 -1, IF_OPER_UP);
578
579 attrlen = len;
580 attr = (struct rtattr *) buf;
581 rta_len = RTA_ALIGN(sizeof(struct rtattr));
582 while (RTA_OK(attr, attrlen)) {
583 if (attr->rta_type == IFLA_IFNAME) {
584 wpa_driver_nl80211_event_link(
585 drv,
586 ((char *) attr) + rta_len,
587 attr->rta_len - rta_len, 0);
588 } else if (attr->rta_type == IFLA_MASTER)
589 brid = nla_get_u32((struct nlattr *) attr);
590 attr = RTA_NEXT(attr, attrlen);
591 }
592
593 #ifdef HOSTAPD
594 if (ifi->ifi_family == AF_BRIDGE && brid) {
595 /* device has been added to bridge */
596 char namebuf[IFNAMSIZ];
597 if_indextoname(brid, namebuf);
598 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
599 brid, namebuf);
600 add_ifidx(drv, brid);
601 }
602 #endif /* HOSTAPD */
603 }
604
605
606 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
607 struct ifinfomsg *ifi,
608 u8 *buf, size_t len)
609 {
610 struct nl80211_global *global = ctx;
611 struct wpa_driver_nl80211_data *drv;
612 int attrlen, rta_len;
613 struct rtattr *attr;
614 u32 brid = 0;
615
616 drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
617 if (!drv) {
618 wpa_printf(MSG_DEBUG, "nl80211: Ignore dellink event for "
619 "foreign ifindex %d", ifi->ifi_index);
620 return;
621 }
622
623 attrlen = len;
624 attr = (struct rtattr *) buf;
625
626 rta_len = RTA_ALIGN(sizeof(struct rtattr));
627 while (RTA_OK(attr, attrlen)) {
628 if (attr->rta_type == IFLA_IFNAME) {
629 wpa_driver_nl80211_event_link(
630 drv,
631 ((char *) attr) + rta_len,
632 attr->rta_len - rta_len, 1);
633 } else if (attr->rta_type == IFLA_MASTER)
634 brid = nla_get_u32((struct nlattr *) attr);
635 attr = RTA_NEXT(attr, attrlen);
636 }
637
638 #ifdef HOSTAPD
639 if (ifi->ifi_family == AF_BRIDGE && brid) {
640 /* device has been removed from bridge */
641 char namebuf[IFNAMSIZ];
642 if_indextoname(brid, namebuf);
643 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
644 "%s", brid, namebuf);
645 del_ifidx(drv, brid);
646 }
647 #endif /* HOSTAPD */
648 }
649
650
651 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
652 const u8 *frame, size_t len)
653 {
654 const struct ieee80211_mgmt *mgmt;
655 union wpa_event_data event;
656
657 mgmt = (const struct ieee80211_mgmt *) frame;
658 if (len < 24 + sizeof(mgmt->u.auth)) {
659 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
660 "frame");
661 return;
662 }
663
664 os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
665 os_memset(&event, 0, sizeof(event));
666 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
667 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
668 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
669 if (len > 24 + sizeof(mgmt->u.auth)) {
670 event.auth.ies = mgmt->u.auth.variable;
671 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
672 }
673
674 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
675 }
676
677
678 static unsigned int nl80211_get_assoc_freq(struct wpa_driver_nl80211_data *drv)
679 {
680 struct nl_msg *msg;
681 int ret;
682 struct nl80211_bss_info_arg arg;
683
684 os_memset(&arg, 0, sizeof(arg));
685 msg = nlmsg_alloc();
686 if (!msg)
687 goto nla_put_failure;
688
689 nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SCAN);
690 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
691
692 arg.drv = drv;
693 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
694 msg = NULL;
695 if (ret == 0) {
696 wpa_printf(MSG_DEBUG, "nl80211: Operating frequency for the "
697 "associated BSS from scan results: %u MHz",
698 arg.assoc_freq);
699 return arg.assoc_freq ? arg.assoc_freq : drv->assoc_freq;
700 }
701 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
702 "(%s)", ret, strerror(-ret));
703 nla_put_failure:
704 nlmsg_free(msg);
705 return drv->assoc_freq;
706 }
707
708
709 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
710 const u8 *frame, size_t len)
711 {
712 const struct ieee80211_mgmt *mgmt;
713 union wpa_event_data event;
714 u16 status;
715
716 mgmt = (const struct ieee80211_mgmt *) frame;
717 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
718 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
719 "frame");
720 return;
721 }
722
723 status = le_to_host16(mgmt->u.assoc_resp.status_code);
724 if (status != WLAN_STATUS_SUCCESS) {
725 os_memset(&event, 0, sizeof(event));
726 event.assoc_reject.bssid = mgmt->bssid;
727 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
728 event.assoc_reject.resp_ies =
729 (u8 *) mgmt->u.assoc_resp.variable;
730 event.assoc_reject.resp_ies_len =
731 len - 24 - sizeof(mgmt->u.assoc_resp);
732 }
733 event.assoc_reject.status_code = status;
734
735 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
736 return;
737 }
738
739 drv->associated = 1;
740 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
741
742 os_memset(&event, 0, sizeof(event));
743 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
744 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
745 event.assoc_info.resp_ies_len =
746 len - 24 - sizeof(mgmt->u.assoc_resp);
747 }
748
749 event.assoc_info.freq = drv->assoc_freq;
750
751 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
752 }
753
754
755 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
756 enum nl80211_commands cmd, struct nlattr *status,
757 struct nlattr *addr, struct nlattr *req_ie,
758 struct nlattr *resp_ie)
759 {
760 union wpa_event_data event;
761
762 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
763 /*
764 * Avoid reporting two association events that would confuse
765 * the core code.
766 */
767 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
768 "when using userspace SME", cmd);
769 return;
770 }
771
772 os_memset(&event, 0, sizeof(event));
773 if (cmd == NL80211_CMD_CONNECT &&
774 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
775 if (addr)
776 event.assoc_reject.bssid = nla_data(addr);
777 if (resp_ie) {
778 event.assoc_reject.resp_ies = nla_data(resp_ie);
779 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
780 }
781 event.assoc_reject.status_code = nla_get_u16(status);
782 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
783 return;
784 }
785
786 drv->associated = 1;
787 if (addr)
788 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
789
790 if (req_ie) {
791 event.assoc_info.req_ies = nla_data(req_ie);
792 event.assoc_info.req_ies_len = nla_len(req_ie);
793 }
794 if (resp_ie) {
795 event.assoc_info.resp_ies = nla_data(resp_ie);
796 event.assoc_info.resp_ies_len = nla_len(resp_ie);
797 }
798
799 event.assoc_info.freq = nl80211_get_assoc_freq(drv);
800
801 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
802 }
803
804
805 static void mlme_event_disconnect(struct wpa_driver_nl80211_data *drv,
806 struct nlattr *reason, struct nlattr *addr)
807 {
808 union wpa_event_data data;
809
810 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
811 /*
812 * Avoid reporting two disassociation events that could
813 * confuse the core code.
814 */
815 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
816 "event when using userspace SME");
817 return;
818 }
819
820 drv->associated = 0;
821 os_memset(&data, 0, sizeof(data));
822 if (reason)
823 data.disassoc_info.reason_code = nla_get_u16(reason);
824 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
825 }
826
827
828 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
829 enum nl80211_commands cmd, struct nlattr *addr)
830 {
831 union wpa_event_data event;
832 enum wpa_event_type ev;
833
834 if (nla_len(addr) != ETH_ALEN)
835 return;
836
837 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
838 cmd, MAC2STR((u8 *) nla_data(addr)));
839
840 if (cmd == NL80211_CMD_AUTHENTICATE)
841 ev = EVENT_AUTH_TIMED_OUT;
842 else if (cmd == NL80211_CMD_ASSOCIATE)
843 ev = EVENT_ASSOC_TIMED_OUT;
844 else
845 return;
846
847 os_memset(&event, 0, sizeof(event));
848 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
849 wpa_supplicant_event(drv->ctx, ev, &event);
850 }
851
852
853 static void mlme_event_mgmt(struct wpa_driver_nl80211_data *drv,
854 struct nlattr *freq, const u8 *frame, size_t len)
855 {
856 const struct ieee80211_mgmt *mgmt;
857 union wpa_event_data event;
858 u16 fc, stype;
859
860 mgmt = (const struct ieee80211_mgmt *) frame;
861 if (len < 24) {
862 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
863 return;
864 }
865
866 fc = le_to_host16(mgmt->frame_control);
867 stype = WLAN_FC_GET_STYPE(fc);
868
869 os_memset(&event, 0, sizeof(event));
870 if (freq) {
871 event.rx_action.freq = nla_get_u32(freq);
872 drv->last_mgmt_freq = event.rx_action.freq;
873 }
874 if (stype == WLAN_FC_STYPE_ACTION) {
875 event.rx_action.da = mgmt->da;
876 event.rx_action.sa = mgmt->sa;
877 event.rx_action.bssid = mgmt->bssid;
878 event.rx_action.category = mgmt->u.action.category;
879 event.rx_action.data = &mgmt->u.action.category + 1;
880 event.rx_action.len = frame + len - event.rx_action.data;
881 wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
882 } else {
883 event.rx_mgmt.frame = frame;
884 event.rx_mgmt.frame_len = len;
885 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
886 }
887 }
888
889
890 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
891 struct nlattr *cookie, const u8 *frame,
892 size_t len, struct nlattr *ack)
893 {
894 union wpa_event_data event;
895 const struct ieee80211_hdr *hdr;
896 u16 fc;
897 u64 cookie_val;
898
899 if (!cookie)
900 return;
901
902 cookie_val = nla_get_u64(cookie);
903 wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
904 "(ack=%d)",
905 (long long unsigned int) cookie_val,
906 cookie_val == drv->send_action_cookie ?
907 " (match)" : " (unknown)", ack != NULL);
908 if (cookie_val != drv->send_action_cookie)
909 return;
910
911 hdr = (const struct ieee80211_hdr *) frame;
912 fc = le_to_host16(hdr->frame_control);
913
914 os_memset(&event, 0, sizeof(event));
915 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
916 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
917 event.tx_status.dst = hdr->addr1;
918 event.tx_status.data = frame;
919 event.tx_status.data_len = len;
920 event.tx_status.ack = ack != NULL;
921 wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
922 }
923
924
925 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
926 enum wpa_event_type type,
927 const u8 *frame, size_t len)
928 {
929 const struct ieee80211_mgmt *mgmt;
930 union wpa_event_data event;
931 const u8 *bssid = NULL;
932 u16 reason_code = 0;
933
934 mgmt = (const struct ieee80211_mgmt *) frame;
935 if (len >= 24) {
936 bssid = mgmt->bssid;
937
938 if (drv->associated != 0 &&
939 os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
940 os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
941 /*
942 * We have presumably received this deauth as a
943 * response to a clear_state_mismatch() outgoing
944 * deauth. Don't let it take us offline!
945 */
946 wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
947 "from Unknown BSSID " MACSTR " -- ignoring",
948 MAC2STR(bssid));
949 return;
950 }
951 }
952
953 drv->associated = 0;
954 os_memset(&event, 0, sizeof(event));
955
956 /* Note: Same offset for Reason Code in both frame subtypes */
957 if (len >= 24 + sizeof(mgmt->u.deauth))
958 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
959
960 if (type == EVENT_DISASSOC) {
961 event.disassoc_info.addr = bssid;
962 event.disassoc_info.reason_code = reason_code;
963 if (frame + len > mgmt->u.disassoc.variable) {
964 event.disassoc_info.ie = mgmt->u.disassoc.variable;
965 event.disassoc_info.ie_len = frame + len -
966 mgmt->u.disassoc.variable;
967 }
968 } else {
969 event.deauth_info.addr = bssid;
970 event.deauth_info.reason_code = reason_code;
971 if (frame + len > mgmt->u.deauth.variable) {
972 event.deauth_info.ie = mgmt->u.deauth.variable;
973 event.deauth_info.ie_len = frame + len -
974 mgmt->u.deauth.variable;
975 }
976 }
977
978 wpa_supplicant_event(drv->ctx, type, &event);
979 }
980
981
982 static void mlme_event_unprot_disconnect(struct wpa_driver_nl80211_data *drv,
983 enum wpa_event_type type,
984 const u8 *frame, size_t len)
985 {
986 const struct ieee80211_mgmt *mgmt;
987 union wpa_event_data event;
988 u16 reason_code = 0;
989
990 if (len < 24)
991 return;
992
993 mgmt = (const struct ieee80211_mgmt *) frame;
994
995 os_memset(&event, 0, sizeof(event));
996 /* Note: Same offset for Reason Code in both frame subtypes */
997 if (len >= 24 + sizeof(mgmt->u.deauth))
998 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
999
1000 if (type == EVENT_UNPROT_DISASSOC) {
1001 event.unprot_disassoc.sa = mgmt->sa;
1002 event.unprot_disassoc.da = mgmt->da;
1003 event.unprot_disassoc.reason_code = reason_code;
1004 } else {
1005 event.unprot_deauth.sa = mgmt->sa;
1006 event.unprot_deauth.da = mgmt->da;
1007 event.unprot_deauth.reason_code = reason_code;
1008 }
1009
1010 wpa_supplicant_event(drv->ctx, type, &event);
1011 }
1012
1013
1014 static void mlme_event(struct wpa_driver_nl80211_data *drv,
1015 enum nl80211_commands cmd, struct nlattr *frame,
1016 struct nlattr *addr, struct nlattr *timed_out,
1017 struct nlattr *freq, struct nlattr *ack,
1018 struct nlattr *cookie)
1019 {
1020 if (timed_out && addr) {
1021 mlme_timeout_event(drv, cmd, addr);
1022 return;
1023 }
1024
1025 if (frame == NULL) {
1026 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
1027 "data", cmd);
1028 return;
1029 }
1030
1031 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
1032 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
1033 nla_data(frame), nla_len(frame));
1034
1035 switch (cmd) {
1036 case NL80211_CMD_AUTHENTICATE:
1037 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
1038 break;
1039 case NL80211_CMD_ASSOCIATE:
1040 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
1041 break;
1042 case NL80211_CMD_DEAUTHENTICATE:
1043 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
1044 nla_data(frame), nla_len(frame));
1045 break;
1046 case NL80211_CMD_DISASSOCIATE:
1047 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
1048 nla_data(frame), nla_len(frame));
1049 break;
1050 case NL80211_CMD_FRAME:
1051 mlme_event_mgmt(drv, freq, nla_data(frame), nla_len(frame));
1052 break;
1053 case NL80211_CMD_FRAME_TX_STATUS:
1054 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
1055 nla_len(frame), ack);
1056 break;
1057 case NL80211_CMD_UNPROT_DEAUTHENTICATE:
1058 mlme_event_unprot_disconnect(drv, EVENT_UNPROT_DEAUTH,
1059 nla_data(frame), nla_len(frame));
1060 break;
1061 case NL80211_CMD_UNPROT_DISASSOCIATE:
1062 mlme_event_unprot_disconnect(drv, EVENT_UNPROT_DISASSOC,
1063 nla_data(frame), nla_len(frame));
1064 break;
1065 default:
1066 break;
1067 }
1068 }
1069
1070
1071 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
1072 struct nlattr *tb[])
1073 {
1074 union wpa_event_data data;
1075
1076 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
1077 os_memset(&data, 0, sizeof(data));
1078 if (tb[NL80211_ATTR_MAC]) {
1079 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
1080 nla_data(tb[NL80211_ATTR_MAC]),
1081 nla_len(tb[NL80211_ATTR_MAC]));
1082 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
1083 }
1084 if (tb[NL80211_ATTR_KEY_SEQ]) {
1085 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
1086 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
1087 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
1088 }
1089 if (tb[NL80211_ATTR_KEY_TYPE]) {
1090 enum nl80211_key_type key_type =
1091 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
1092 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
1093 if (key_type == NL80211_KEYTYPE_PAIRWISE)
1094 data.michael_mic_failure.unicast = 1;
1095 } else
1096 data.michael_mic_failure.unicast = 1;
1097
1098 if (tb[NL80211_ATTR_KEY_IDX]) {
1099 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
1100 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
1101 }
1102
1103 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
1104 }
1105
1106
1107 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
1108 struct nlattr *tb[])
1109 {
1110 if (tb[NL80211_ATTR_MAC] == NULL) {
1111 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
1112 "event");
1113 return;
1114 }
1115 os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
1116 drv->associated = 1;
1117 wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
1118 MAC2STR(drv->bssid));
1119
1120 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
1121 }
1122
1123
1124 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
1125 int cancel_event, struct nlattr *tb[])
1126 {
1127 unsigned int freq, chan_type, duration;
1128 union wpa_event_data data;
1129 u64 cookie;
1130
1131 if (tb[NL80211_ATTR_WIPHY_FREQ])
1132 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1133 else
1134 freq = 0;
1135
1136 if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1137 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1138 else
1139 chan_type = 0;
1140
1141 if (tb[NL80211_ATTR_DURATION])
1142 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
1143 else
1144 duration = 0;
1145
1146 if (tb[NL80211_ATTR_COOKIE])
1147 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
1148 else
1149 cookie = 0;
1150
1151 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
1152 "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
1153 cancel_event, freq, chan_type, duration,
1154 (long long unsigned int) cookie,
1155 cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
1156
1157 if (cookie != drv->remain_on_chan_cookie)
1158 return; /* not for us */
1159
1160 if (cancel_event)
1161 drv->pending_remain_on_chan = 0;
1162
1163 os_memset(&data, 0, sizeof(data));
1164 data.remain_on_channel.freq = freq;
1165 data.remain_on_channel.duration = duration;
1166 wpa_supplicant_event(drv->ctx, cancel_event ?
1167 EVENT_CANCEL_REMAIN_ON_CHANNEL :
1168 EVENT_REMAIN_ON_CHANNEL, &data);
1169 }
1170
1171
1172 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
1173 struct nlattr *tb[])
1174 {
1175 union wpa_event_data event;
1176 struct nlattr *nl;
1177 int rem;
1178 struct scan_info *info;
1179 #define MAX_REPORT_FREQS 50
1180 int freqs[MAX_REPORT_FREQS];
1181 int num_freqs = 0;
1182
1183 os_memset(&event, 0, sizeof(event));
1184 info = &event.scan_info;
1185 info->aborted = aborted;
1186
1187 if (tb[NL80211_ATTR_SCAN_SSIDS]) {
1188 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
1189 struct wpa_driver_scan_ssid *s =
1190 &info->ssids[info->num_ssids];
1191 s->ssid = nla_data(nl);
1192 s->ssid_len = nla_len(nl);
1193 info->num_ssids++;
1194 if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
1195 break;
1196 }
1197 }
1198 if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
1199 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
1200 {
1201 freqs[num_freqs] = nla_get_u32(nl);
1202 num_freqs++;
1203 if (num_freqs == MAX_REPORT_FREQS - 1)
1204 break;
1205 }
1206 info->freqs = freqs;
1207 info->num_freqs = num_freqs;
1208 }
1209 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
1210 }
1211
1212
1213 static int get_link_signal(struct nl_msg *msg, void *arg)
1214 {
1215 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1216 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1217 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1218 static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
1219 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1220 };
1221 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1222 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1223 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1224 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1225 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1226 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1227 };
1228 struct wpa_signal_info *sig_change = arg;
1229
1230 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1231 genlmsg_attrlen(gnlh, 0), NULL);
1232 if (!tb[NL80211_ATTR_STA_INFO] ||
1233 nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1234 tb[NL80211_ATTR_STA_INFO], policy))
1235 return NL_SKIP;
1236 if (!sinfo[NL80211_STA_INFO_SIGNAL])
1237 return NL_SKIP;
1238
1239 sig_change->current_signal =
1240 (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1241
1242 if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
1243 if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1244 sinfo[NL80211_STA_INFO_TX_BITRATE],
1245 rate_policy)) {
1246 sig_change->current_txrate = 0;
1247 } else {
1248 if (rinfo[NL80211_RATE_INFO_BITRATE]) {
1249 sig_change->current_txrate =
1250 nla_get_u16(rinfo[
1251 NL80211_RATE_INFO_BITRATE]) * 100;
1252 }
1253 }
1254 }
1255
1256 return NL_SKIP;
1257 }
1258
1259
1260 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
1261 struct wpa_signal_info *sig)
1262 {
1263 struct nl_msg *msg;
1264
1265 sig->current_signal = -9999;
1266 sig->current_txrate = 0;
1267
1268 msg = nlmsg_alloc();
1269 if (!msg)
1270 return -ENOMEM;
1271
1272 nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_STATION);
1273
1274 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1275 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
1276
1277 return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1278 nla_put_failure:
1279 return -ENOBUFS;
1280 }
1281
1282
1283 static int get_link_noise(struct nl_msg *msg, void *arg)
1284 {
1285 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1286 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1287 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1288 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1289 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1290 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1291 };
1292 struct wpa_signal_info *sig_change = arg;
1293
1294 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1295 genlmsg_attrlen(gnlh, 0), NULL);
1296
1297 if (!tb[NL80211_ATTR_SURVEY_INFO]) {
1298 wpa_printf(MSG_DEBUG, "nl80211: survey data missing!");
1299 return NL_SKIP;
1300 }
1301
1302 if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1303 tb[NL80211_ATTR_SURVEY_INFO],
1304 survey_policy)) {
1305 wpa_printf(MSG_DEBUG, "nl80211: failed to parse nested "
1306 "attributes!");
1307 return NL_SKIP;
1308 }
1309
1310 if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1311 return NL_SKIP;
1312
1313 if (nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
1314 sig_change->frequency)
1315 return NL_SKIP;
1316
1317 if (!sinfo[NL80211_SURVEY_INFO_NOISE])
1318 return NL_SKIP;
1319
1320 sig_change->current_noise =
1321 (s8) nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1322
1323 return NL_SKIP;
1324 }
1325
1326
1327 static int nl80211_get_link_noise(struct wpa_driver_nl80211_data *drv,
1328 struct wpa_signal_info *sig_change)
1329 {
1330 struct nl_msg *msg;
1331
1332 sig_change->current_noise = 9999;
1333 sig_change->frequency = drv->assoc_freq;
1334
1335 msg = nlmsg_alloc();
1336 if (!msg)
1337 return -ENOMEM;
1338
1339 nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);
1340
1341 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1342
1343 return send_and_recv_msgs(drv, msg, get_link_noise, sig_change);
1344 nla_put_failure:
1345 return -ENOBUFS;
1346 }
1347
1348
1349 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1350 struct nlattr *tb[])
1351 {
1352 static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1353 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1354 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1355 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1356 [NL80211_ATTR_CQM_PKT_LOSS_EVENT] = { .type = NLA_U32 },
1357 };
1358 struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1359 enum nl80211_cqm_rssi_threshold_event event;
1360 union wpa_event_data ed;
1361 struct wpa_signal_info sig;
1362 int res;
1363
1364 if (tb[NL80211_ATTR_CQM] == NULL ||
1365 nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1366 cqm_policy)) {
1367 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1368 return;
1369 }
1370
1371 os_memset(&ed, 0, sizeof(ed));
1372
1373 if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]) {
1374 if (!tb[NL80211_ATTR_MAC])
1375 return;
1376 os_memcpy(ed.low_ack.addr, nla_data(tb[NL80211_ATTR_MAC]),
1377 ETH_ALEN);
1378 wpa_supplicant_event(drv->ctx, EVENT_STATION_LOW_ACK, &ed);
1379 return;
1380 }
1381
1382 if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1383 return;
1384 event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1385
1386 if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1387 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1388 "event: RSSI high");
1389 ed.signal_change.above_threshold = 1;
1390 } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1391 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1392 "event: RSSI low");
1393 ed.signal_change.above_threshold = 0;
1394 } else
1395 return;
1396
1397 res = nl80211_get_link_signal(drv, &sig);
1398 if (res == 0) {
1399 ed.signal_change.current_signal = sig.current_signal;
1400 ed.signal_change.current_txrate = sig.current_txrate;
1401 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm txrate: %d",
1402 sig.current_signal, sig.current_txrate);
1403 }
1404
1405 res = nl80211_get_link_noise(drv, &sig);
1406 if (res == 0) {
1407 ed.signal_change.current_noise = sig.current_noise;
1408 wpa_printf(MSG_DEBUG, "nl80211: Noise: %d dBm",
1409 sig.current_noise);
1410 }
1411
1412 wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1413 }
1414
1415
1416 static void nl80211_new_station_event(struct wpa_driver_nl80211_data *drv,
1417 struct nlattr **tb)
1418 {
1419 u8 *addr;
1420 union wpa_event_data data;
1421
1422 if (tb[NL80211_ATTR_MAC] == NULL)
1423 return;
1424 addr = nla_data(tb[NL80211_ATTR_MAC]);
1425 wpa_printf(MSG_DEBUG, "nl80211: New station " MACSTR, MAC2STR(addr));
1426
1427 if (is_ap_interface(drv->nlmode) && drv->no_monitor_iface_capab) {
1428 u8 *ies = NULL;
1429 size_t ies_len = 0;
1430 if (tb[NL80211_ATTR_IE]) {
1431 ies = nla_data(tb[NL80211_ATTR_IE]);
1432 ies_len = nla_len(tb[NL80211_ATTR_IE]);
1433 }
1434 wpa_hexdump(MSG_DEBUG, "nl80211: Assoc Req IEs", ies, ies_len);
1435 drv_event_assoc(drv->ctx, addr, ies, ies_len, 0);
1436 return;
1437 }
1438
1439 if (drv->nlmode != NL80211_IFTYPE_ADHOC)
1440 return;
1441
1442 os_memset(&data, 0, sizeof(data));
1443 os_memcpy(data.ibss_rsn_start.peer, addr, ETH_ALEN);
1444 wpa_supplicant_event(drv->ctx, EVENT_IBSS_RSN_START, &data);
1445 }
1446
1447
1448 static void nl80211_del_station_event(struct wpa_driver_nl80211_data *drv,
1449 struct nlattr **tb)
1450 {
1451 u8 *addr;
1452 union wpa_event_data data;
1453
1454 if (tb[NL80211_ATTR_MAC] == NULL)
1455 return;
1456 addr = nla_data(tb[NL80211_ATTR_MAC]);
1457 wpa_printf(MSG_DEBUG, "nl80211: Delete station " MACSTR,
1458 MAC2STR(addr));
1459
1460 if (is_ap_interface(drv->nlmode) && drv->no_monitor_iface_capab) {
1461 drv_event_disassoc(drv->ctx, addr);
1462 return;
1463 }
1464
1465 if (drv->nlmode != NL80211_IFTYPE_ADHOC)
1466 return;
1467
1468 os_memset(&data, 0, sizeof(data));
1469 os_memcpy(data.ibss_peer_lost.peer, addr, ETH_ALEN);
1470 wpa_supplicant_event(drv->ctx, EVENT_IBSS_PEER_LOST, &data);
1471 }
1472
1473
1474 static void nl80211_rekey_offload_event(struct wpa_driver_nl80211_data *drv,
1475 struct nlattr **tb)
1476 {
1477 struct nlattr *rekey_info[NUM_NL80211_REKEY_DATA];
1478 static struct nla_policy rekey_policy[NUM_NL80211_REKEY_DATA] = {
1479 [NL80211_REKEY_DATA_KEK] = {
1480 .minlen = NL80211_KEK_LEN,
1481 .maxlen = NL80211_KEK_LEN,
1482 },
1483 [NL80211_REKEY_DATA_KCK] = {
1484 .minlen = NL80211_KCK_LEN,
1485 .maxlen = NL80211_KCK_LEN,
1486 },
1487 [NL80211_REKEY_DATA_REPLAY_CTR] = {
1488 .minlen = NL80211_REPLAY_CTR_LEN,
1489 .maxlen = NL80211_REPLAY_CTR_LEN,
1490 },
1491 };
1492 union wpa_event_data data;
1493
1494 if (!tb[NL80211_ATTR_MAC])
1495 return;
1496 if (!tb[NL80211_ATTR_REKEY_DATA])
1497 return;
1498 if (nla_parse_nested(rekey_info, MAX_NL80211_REKEY_DATA,
1499 tb[NL80211_ATTR_REKEY_DATA], rekey_policy))
1500 return;
1501 if (!rekey_info[NL80211_REKEY_DATA_REPLAY_CTR])
1502 return;
1503
1504 os_memset(&data, 0, sizeof(data));
1505 data.driver_gtk_rekey.bssid = nla_data(tb[NL80211_ATTR_MAC]);
1506 wpa_printf(MSG_DEBUG, "nl80211: Rekey offload event for BSSID " MACSTR,
1507 MAC2STR(data.driver_gtk_rekey.bssid));
1508 data.driver_gtk_rekey.replay_ctr =
1509 nla_data(rekey_info[NL80211_REKEY_DATA_REPLAY_CTR]);
1510 wpa_hexdump(MSG_DEBUG, "nl80211: Rekey offload - Replay Counter",
1511 data.driver_gtk_rekey.replay_ctr, NL80211_REPLAY_CTR_LEN);
1512 wpa_supplicant_event(drv->ctx, EVENT_DRIVER_GTK_REKEY, &data);
1513 }
1514
1515
1516 static void nl80211_pmksa_candidate_event(struct wpa_driver_nl80211_data *drv,
1517 struct nlattr **tb)
1518 {
1519 struct nlattr *cand[NUM_NL80211_PMKSA_CANDIDATE];
1520 static struct nla_policy cand_policy[NUM_NL80211_PMKSA_CANDIDATE] = {
1521 [NL80211_PMKSA_CANDIDATE_INDEX] = { .type = NLA_U32 },
1522 [NL80211_PMKSA_CANDIDATE_BSSID] = {
1523 .minlen = ETH_ALEN,
1524 .maxlen = ETH_ALEN,
1525 },
1526 [NL80211_PMKSA_CANDIDATE_PREAUTH] = { .type = NLA_FLAG },
1527 };
1528 union wpa_event_data data;
1529
1530 if (!tb[NL80211_ATTR_PMKSA_CANDIDATE])
1531 return;
1532 if (nla_parse_nested(cand, MAX_NL80211_PMKSA_CANDIDATE,
1533 tb[NL80211_ATTR_PMKSA_CANDIDATE], cand_policy))
1534 return;
1535 if (!cand[NL80211_PMKSA_CANDIDATE_INDEX] ||
1536 !cand[NL80211_PMKSA_CANDIDATE_BSSID])
1537 return;
1538
1539 os_memset(&data, 0, sizeof(data));
1540 os_memcpy(data.pmkid_candidate.bssid,
1541 nla_data(cand[NL80211_PMKSA_CANDIDATE_BSSID]), ETH_ALEN);
1542 data.pmkid_candidate.index =
1543 nla_get_u32(cand[NL80211_PMKSA_CANDIDATE_INDEX]);
1544 data.pmkid_candidate.preauth =
1545 cand[NL80211_PMKSA_CANDIDATE_PREAUTH] != NULL;
1546 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
1547 }
1548
1549
1550 static int process_event(struct nl_msg *msg, void *arg)
1551 {
1552 struct wpa_driver_nl80211_data *drv = arg;
1553 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1554 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1555
1556 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1557 genlmsg_attrlen(gnlh, 0), NULL);
1558
1559 if (tb[NL80211_ATTR_IFINDEX]) {
1560 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1561 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1562 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1563 " for foreign interface (ifindex %d)",
1564 gnlh->cmd, ifindex);
1565 return NL_SKIP;
1566 }
1567 }
1568
1569 if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED &&
1570 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1571 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1572 wpa_driver_nl80211_set_mode(&drv->first_bss,
1573 drv->ap_scan_as_station);
1574 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
1575 }
1576
1577 switch (gnlh->cmd) {
1578 case NL80211_CMD_TRIGGER_SCAN:
1579 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1580 break;
1581 case NL80211_CMD_START_SCHED_SCAN:
1582 wpa_printf(MSG_DEBUG, "nl80211: Sched scan started");
1583 break;
1584 case NL80211_CMD_SCHED_SCAN_STOPPED:
1585 wpa_printf(MSG_DEBUG, "nl80211: Sched scan stopped");
1586 wpa_supplicant_event(drv->ctx, EVENT_SCHED_SCAN_STOPPED, NULL);
1587 break;
1588 case NL80211_CMD_NEW_SCAN_RESULTS:
1589 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1590 drv->scan_complete_events = 1;
1591 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1592 drv->ctx);
1593 send_scan_event(drv, 0, tb);
1594 break;
1595 case NL80211_CMD_SCHED_SCAN_RESULTS:
1596 wpa_printf(MSG_DEBUG,
1597 "nl80211: New sched scan results available");
1598 send_scan_event(drv, 0, tb);
1599 break;
1600 case NL80211_CMD_SCAN_ABORTED:
1601 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1602 /*
1603 * Need to indicate that scan results are available in order
1604 * not to make wpa_supplicant stop its scanning.
1605 */
1606 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1607 drv->ctx);
1608 send_scan_event(drv, 1, tb);
1609 break;
1610 case NL80211_CMD_AUTHENTICATE:
1611 case NL80211_CMD_ASSOCIATE:
1612 case NL80211_CMD_DEAUTHENTICATE:
1613 case NL80211_CMD_DISASSOCIATE:
1614 case NL80211_CMD_FRAME:
1615 case NL80211_CMD_FRAME_TX_STATUS:
1616 case NL80211_CMD_UNPROT_DEAUTHENTICATE:
1617 case NL80211_CMD_UNPROT_DISASSOCIATE:
1618 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1619 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1620 tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1621 tb[NL80211_ATTR_COOKIE]);
1622 break;
1623 case NL80211_CMD_CONNECT:
1624 case NL80211_CMD_ROAM:
1625 mlme_event_connect(drv, gnlh->cmd,
1626 tb[NL80211_ATTR_STATUS_CODE],
1627 tb[NL80211_ATTR_MAC],
1628 tb[NL80211_ATTR_REQ_IE],
1629 tb[NL80211_ATTR_RESP_IE]);
1630 break;
1631 case NL80211_CMD_DISCONNECT:
1632 mlme_event_disconnect(drv, tb[NL80211_ATTR_REASON_CODE],
1633 tb[NL80211_ATTR_MAC]);
1634 break;
1635 case NL80211_CMD_MICHAEL_MIC_FAILURE:
1636 mlme_event_michael_mic_failure(drv, tb);
1637 break;
1638 case NL80211_CMD_JOIN_IBSS:
1639 mlme_event_join_ibss(drv, tb);
1640 break;
1641 case NL80211_CMD_REMAIN_ON_CHANNEL:
1642 mlme_event_remain_on_channel(drv, 0, tb);
1643 break;
1644 case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1645 mlme_event_remain_on_channel(drv, 1, tb);
1646 break;
1647 case NL80211_CMD_NOTIFY_CQM:
1648 nl80211_cqm_event(drv, tb);
1649 break;
1650 case NL80211_CMD_REG_CHANGE:
1651 wpa_printf(MSG_DEBUG, "nl80211: Regulatory domain change");
1652 wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
1653 NULL);
1654 break;
1655 case NL80211_CMD_REG_BEACON_HINT:
1656 wpa_printf(MSG_DEBUG, "nl80211: Regulatory beacon hint");
1657 wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
1658 NULL);
1659 break;
1660 case NL80211_CMD_NEW_STATION:
1661 nl80211_new_station_event(drv, tb);
1662 break;
1663 case NL80211_CMD_DEL_STATION:
1664 nl80211_del_station_event(drv, tb);
1665 break;
1666 case NL80211_CMD_SET_REKEY_OFFLOAD:
1667 nl80211_rekey_offload_event(drv, tb);
1668 break;
1669 case NL80211_CMD_PMKSA_CANDIDATE:
1670 nl80211_pmksa_candidate_event(drv, tb);
1671 break;
1672 default:
1673 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1674 "(cmd=%d)", gnlh->cmd);
1675 break;
1676 }
1677
1678 return NL_SKIP;
1679 }
1680
1681
1682 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1683 void *handle)
1684 {
1685 struct nl_cb *cb;
1686 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1687
1688 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1689
1690 cb = nl_cb_clone(drv->nl_cb);
1691 if (!cb)
1692 return;
1693 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1694 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1695 nl_recvmsgs(handle, cb);
1696 nl_cb_put(cb);
1697 }
1698
1699
1700 /**
1701 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1702 * @priv: driver_nl80211 private data
1703 * @alpha2_arg: country to which to switch to
1704 * Returns: 0 on success, -1 on failure
1705 *
1706 * This asks nl80211 to set the regulatory domain for given
1707 * country ISO / IEC alpha2.
1708 */
1709 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1710 {
1711 struct i802_bss *bss = priv;
1712 struct wpa_driver_nl80211_data *drv = bss->drv;
1713 char alpha2[3];
1714 struct nl_msg *msg;
1715
1716 msg = nlmsg_alloc();
1717 if (!msg)
1718 return -ENOMEM;
1719
1720 alpha2[0] = alpha2_arg[0];
1721 alpha2[1] = alpha2_arg[1];
1722 alpha2[2] = '\0';
1723
1724 nl80211_cmd(drv, msg, 0, NL80211_CMD_REQ_SET_REG);
1725
1726 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1727 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1728 return -EINVAL;
1729 return 0;
1730 nla_put_failure:
1731 return -EINVAL;
1732 }
1733
1734
1735 struct wiphy_info_data {
1736 struct wpa_driver_capa *capa;
1737
1738 unsigned int error:1;
1739 };
1740
1741
1742 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1743 {
1744 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1745 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1746 struct wiphy_info_data *info = arg;
1747 int p2p_go_supported = 0, p2p_client_supported = 0;
1748 int p2p_concurrent = 0;
1749 int auth_supported = 0, connect_supported = 0;
1750 struct wpa_driver_capa *capa = info->capa;
1751 static struct nla_policy
1752 iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
1753 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
1754 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
1755 [NL80211_IFACE_COMB_STA_AP_BI_MATCH] = { .type = NLA_FLAG },
1756 [NL80211_IFACE_COMB_NUM_CHANNELS] = { .type = NLA_U32 },
1757 },
1758 iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
1759 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
1760 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
1761 };
1762
1763 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1764 genlmsg_attrlen(gnlh, 0), NULL);
1765
1766 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1767 capa->max_scan_ssids =
1768 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1769
1770 if (tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS])
1771 capa->max_sched_scan_ssids =
1772 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS]);
1773
1774 if (tb[NL80211_ATTR_MAX_MATCH_SETS])
1775 capa->max_match_sets =
1776 nla_get_u8(tb[NL80211_ATTR_MAX_MATCH_SETS]);
1777
1778 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1779 struct nlattr *nl_mode;
1780 int i;
1781 nla_for_each_nested(nl_mode,
1782 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1783 switch (nla_type(nl_mode)) {
1784 case NL80211_IFTYPE_AP:
1785 capa->flags |= WPA_DRIVER_FLAGS_AP;
1786 break;
1787 case NL80211_IFTYPE_P2P_GO:
1788 p2p_go_supported = 1;
1789 break;
1790 case NL80211_IFTYPE_P2P_CLIENT:
1791 p2p_client_supported = 1;
1792 break;
1793 }
1794 }
1795 }
1796
1797 if (tb[NL80211_ATTR_INTERFACE_COMBINATIONS]) {
1798 struct nlattr *nl_combi;
1799 int rem_combi;
1800
1801 nla_for_each_nested(nl_combi,
1802 tb[NL80211_ATTR_INTERFACE_COMBINATIONS],
1803 rem_combi) {
1804 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
1805 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
1806 struct nlattr *nl_limit, *nl_mode;
1807 int err, rem_limit, rem_mode;
1808 int combination_has_p2p = 0, combination_has_mgd = 0;
1809
1810 err = nla_parse_nested(tb_comb, MAX_NL80211_IFACE_COMB,
1811 nl_combi,
1812 iface_combination_policy);
1813 if (err || !tb_comb[NL80211_IFACE_COMB_LIMITS] ||
1814 !tb_comb[NL80211_IFACE_COMB_MAXNUM] ||
1815 !tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS])
1816 goto broken_combination;
1817
1818 nla_for_each_nested(nl_limit,
1819 tb_comb[NL80211_IFACE_COMB_LIMITS],
1820 rem_limit) {
1821 err = nla_parse_nested(tb_limit,
1822 MAX_NL80211_IFACE_LIMIT,
1823 nl_limit,
1824 iface_limit_policy);
1825 if (err ||
1826 !tb_limit[NL80211_IFACE_LIMIT_TYPES])
1827 goto broken_combination;
1828
1829 nla_for_each_nested(
1830 nl_mode,
1831 tb_limit[NL80211_IFACE_LIMIT_TYPES],
1832 rem_mode) {
1833 int ift = nla_type(nl_mode);
1834 if (ift == NL80211_IFTYPE_P2P_GO ||
1835 ift == NL80211_IFTYPE_P2P_CLIENT)
1836 combination_has_p2p = 1;
1837 if (ift == NL80211_IFTYPE_STATION)
1838 combination_has_mgd = 1;
1839 }
1840 if (combination_has_p2p && combination_has_mgd)
1841 break;
1842 }
1843
1844 if (combination_has_p2p && combination_has_mgd) {
1845 p2p_concurrent = 1;
1846 break;
1847 }
1848
1849 broken_combination:
1850 ;
1851 }
1852 }
1853
1854 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1855 struct nlattr *nl_cmd;
1856 int i;
1857
1858 nla_for_each_nested(nl_cmd,
1859 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1860 switch (nla_get_u32(nl_cmd)) {
1861 case NL80211_CMD_AUTHENTICATE:
1862 auth_supported = 1;
1863 break;
1864 case NL80211_CMD_CONNECT:
1865 connect_supported = 1;
1866 break;
1867 case NL80211_CMD_START_SCHED_SCAN:
1868 capa->sched_scan_supported = 1;
1869 break;
1870 }
1871 }
1872 }
1873
1874 if (tb[NL80211_ATTR_OFFCHANNEL_TX_OK]) {
1875 wpa_printf(MSG_DEBUG, "nl80211: Using driver-based "
1876 "off-channel TX");
1877 capa->flags |= WPA_DRIVER_FLAGS_OFFCHANNEL_TX;
1878 }
1879
1880 if (tb[NL80211_ATTR_ROAM_SUPPORT]) {
1881 wpa_printf(MSG_DEBUG, "nl80211: Using driver-based roaming");
1882 capa->flags |= WPA_DRIVER_FLAGS_BSS_SELECTION;
1883 }
1884
1885 /* default to 5000 since early versions of mac80211 don't set it */
1886 capa->max_remain_on_chan = 5000;
1887
1888 if (tb[NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION])
1889 capa->max_remain_on_chan =
1890 nla_get_u32(tb[NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION]);
1891
1892 if (auth_supported)
1893 capa->flags |= WPA_DRIVER_FLAGS_SME;
1894 else if (!connect_supported) {
1895 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1896 "authentication/association or connect commands");
1897 info->error = 1;
1898 }
1899
1900 if (p2p_go_supported && p2p_client_supported)
1901 capa->flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1902 if (p2p_concurrent) {
1903 wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
1904 "interface (driver advertised support)");
1905 capa->flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
1906 capa->flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
1907 }
1908
1909 return NL_SKIP;
1910 }
1911
1912
1913 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1914 struct wiphy_info_data *info)
1915 {
1916 struct nl_msg *msg;
1917
1918 os_memset(info, 0, sizeof(*info));
1919 info->capa = &drv->capa;
1920
1921 msg = nlmsg_alloc();
1922 if (!msg)
1923 return -1;
1924
1925 nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_WIPHY);
1926
1927 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1928
1929 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1930 return 0;
1931 msg = NULL;
1932 nla_put_failure:
1933 nlmsg_free(msg);
1934 return -1;
1935 }
1936
1937
1938 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1939 {
1940 struct wiphy_info_data info;
1941 if (wpa_driver_nl80211_get_info(drv, &info))
1942 return -1;
1943
1944 if (info.error)
1945 return -1;
1946
1947 drv->has_capability = 1;
1948 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1949 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1950 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1951 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1952 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1953 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1954 WPA_DRIVER_CAPA_ENC_WEP104 |
1955 WPA_DRIVER_CAPA_ENC_TKIP |
1956 WPA_DRIVER_CAPA_ENC_CCMP;
1957 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1958 WPA_DRIVER_AUTH_SHARED |
1959 WPA_DRIVER_AUTH_LEAP;
1960
1961 drv->capa.flags |= WPA_DRIVER_FLAGS_SANE_ERROR_CODES;
1962 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1963 drv->capa.flags |= WPA_DRIVER_FLAGS_EAPOL_TX_STATUS;
1964 drv->capa.flags |= WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS;
1965
1966 return 0;
1967 }
1968
1969
1970 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1971 {
1972 int ret;
1973
1974 /* Initialize generic netlink and nl80211 */
1975
1976 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1977 if (drv->nl_cb == NULL) {
1978 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1979 "callbacks");
1980 goto err1;
1981 }
1982
1983 drv->nl_handle = nl80211_handle_alloc(drv->nl_cb);
1984 if (drv->nl_handle == NULL) {
1985 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1986 "callbacks");
1987 goto err2;
1988 }
1989
1990 drv->nl_handle_event = nl80211_handle_alloc(drv->nl_cb);
1991 if (drv->nl_handle_event == NULL) {
1992 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1993 "callbacks (event)");
1994 goto err2b;
1995 }
1996
1997 if (genl_connect(drv->nl_handle)) {
1998 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1999 "netlink");
2000 goto err3;
2001 }
2002
2003 if (genl_connect(drv->nl_handle_event)) {
2004 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
2005 "netlink (event)");
2006 goto err3;
2007 }
2008
2009 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
2010 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
2011 "netlink cache");
2012 goto err3;
2013 }
2014 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
2015 0) {
2016 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
2017 "netlink cache (event)");
2018 goto err3b;
2019 }
2020
2021 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2022 if (drv->nl80211 == NULL) {
2023 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
2024 "found");
2025 goto err4;
2026 }
2027
2028 ret = nl_get_multicast_id(drv, "nl80211", "scan");
2029 if (ret >= 0)
2030 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
2031 if (ret < 0) {
2032 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
2033 "membership for scan events: %d (%s)",
2034 ret, strerror(-ret));
2035 goto err4;
2036 }
2037
2038 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
2039 if (ret >= 0)
2040 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
2041 if (ret < 0) {
2042 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
2043 "membership for mlme events: %d (%s)",
2044 ret, strerror(-ret));
2045 goto err4;
2046 }
2047
2048 ret = nl_get_multicast_id(drv, "nl80211", "regulatory");
2049 if (ret >= 0)
2050 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
2051 if (ret < 0) {
2052 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
2053 "membership for regulatory events: %d (%s)",
2054 ret, strerror(-ret));
2055 /* Continue without regulatory events */
2056 }
2057
2058 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
2059 wpa_driver_nl80211_event_receive, drv,
2060 drv->nl_handle_event);
2061
2062 return 0;
2063
2064 err4:
2065 nl_cache_free(drv->nl_cache_event);
2066 err3b:
2067 nl_cache_free(drv->nl_cache);
2068 err3:
2069 nl80211_handle_destroy(drv->nl_handle_event);
2070 err2b:
2071 nl80211_handle_destroy(drv->nl_handle);
2072 err2:
2073 nl_cb_put(drv->nl_cb);
2074 err1:
2075 return -1;
2076 }
2077
2078
2079 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
2080 {
2081 wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
2082 /*
2083 * This may be for any interface; use ifdown event to disable
2084 * interface.
2085 */
2086 }
2087
2088
2089 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
2090 {
2091 struct wpa_driver_nl80211_data *drv = ctx;
2092 wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
2093 if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
2094 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
2095 "after rfkill unblock");
2096 return;
2097 }
2098 /* rtnetlink ifup handler will report interface as enabled */
2099 }
2100
2101
2102 static void nl80211_get_phy_name(struct wpa_driver_nl80211_data *drv)
2103 {
2104 /* Find phy (radio) to which this interface belongs */
2105 char buf[90], *pos;
2106 int f, rv;
2107
2108 drv->phyname[0] = '\0';
2109 snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
2110 drv->first_bss.ifname);
2111 f = open(buf, O_RDONLY);
2112 if (f < 0) {
2113 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
2114 buf, strerror(errno));
2115 return;
2116 }
2117
2118 rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
2119 close(f);
2120 if (rv < 0) {
2121 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
2122 buf, strerror(errno));
2123 return;
2124 }
2125
2126 drv->phyname[rv] = '\0';
2127 pos = os_strchr(drv->phyname, '\n');
2128 if (pos)
2129 *pos = '\0';
2130 wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
2131 drv->first_bss.ifname, drv->phyname);
2132 }
2133
2134
2135 #ifdef CONFIG_AP
2136 static void nl80211_l2_read(void *ctx, const u8 *src_addr, const u8 *buf,
2137 size_t len)
2138 {
2139 wpa_printf(MSG_DEBUG, "nl80211: l2_packet read %u",
2140 (unsigned int) len);
2141 }
2142 #endif /* CONFIG_AP */
2143
2144
2145 /**
2146 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
2147 * @ctx: context to be used when calling wpa_supplicant functions,
2148 * e.g., wpa_supplicant_event()
2149 * @ifname: interface name, e.g., wlan0
2150 * @global_priv: private driver global data from global_init()
2151 * Returns: Pointer to private data, %NULL on failure
2152 */
2153 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
2154 void *global_priv)
2155 {
2156 struct wpa_driver_nl80211_data *drv;
2157 struct rfkill_config *rcfg;
2158 struct i802_bss *bss;
2159
2160 drv = os_zalloc(sizeof(*drv));
2161 if (drv == NULL)
2162 return NULL;
2163 drv->global = global_priv;
2164 drv->ctx = ctx;
2165 bss = &drv->first_bss;
2166 bss->drv = drv;
2167 os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
2168 drv->monitor_ifidx = -1;
2169 drv->monitor_sock = -1;
2170 drv->ioctl_sock = -1;
2171 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
2172
2173 if (wpa_driver_nl80211_init_nl(drv)) {
2174 os_free(drv);
2175 return NULL;
2176 }
2177
2178 nl80211_get_phy_name(drv);
2179
2180 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
2181 if (drv->ioctl_sock < 0) {
2182 perror("socket(PF_INET,SOCK_DGRAM)");
2183 goto failed;
2184 }
2185
2186 rcfg = os_zalloc(sizeof(*rcfg));
2187 if (rcfg == NULL)
2188 goto failed;
2189 rcfg->ctx = drv;
2190 os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
2191 rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
2192 rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
2193 drv->rfkill = rfkill_init(rcfg);
2194 if (drv->rfkill == NULL) {
2195 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
2196 os_free(rcfg);
2197 }
2198
2199 if (wpa_driver_nl80211_finish_drv_init(drv))
2200 goto failed;
2201
2202 #ifdef CONFIG_AP
2203 drv->l2 = l2_packet_init(ifname, NULL, ETH_P_EAPOL,
2204 nl80211_l2_read, drv, 0);
2205 #endif /* CONFIG_AP */
2206
2207 if (drv->global)
2208 dl_list_add(&drv->global->interfaces, &drv->list);
2209
2210 return bss;
2211
2212 failed:
2213 rfkill_deinit(drv->rfkill);
2214 if (drv->ioctl_sock >= 0)
2215 close(drv->ioctl_sock);
2216
2217 genl_family_put(drv->nl80211);
2218 nl_cache_free(drv->nl_cache);
2219 nl80211_handle_destroy(drv->nl_handle);
2220 nl_cb_put(drv->nl_cb);
2221 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
2222
2223 os_free(drv);
2224 return NULL;
2225 }
2226
2227
2228 static int nl80211_register_frame(struct wpa_driver_nl80211_data *drv,
2229 struct nl_handle *nl_handle,
2230 u16 type, const u8 *match, size_t match_len)
2231 {
2232 struct nl_msg *msg;
2233 int ret = -1;
2234
2235 msg = nlmsg_alloc();
2236 if (!msg)
2237 return -1;
2238
2239 nl80211_cmd(drv, msg, 0, NL80211_CMD_REGISTER_ACTION);
2240
2241 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2242 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, type);
2243 NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
2244
2245 ret = send_and_recv(drv, nl_handle, msg, NULL, NULL);
2246 msg = NULL;
2247 if (ret) {
2248 wpa_printf(MSG_DEBUG, "nl80211: Register frame command "
2249 "failed (type=%u): ret=%d (%s)",
2250 type, ret, strerror(-ret));
2251 wpa_hexdump(MSG_DEBUG, "nl80211: Register frame match",
2252 match, match_len);
2253 goto nla_put_failure;
2254 }
2255 ret = 0;
2256 nla_put_failure:
2257 nlmsg_free(msg);
2258 return ret;
2259 }
2260
2261
2262 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
2263 const u8 *match, size_t match_len)
2264 {
2265 u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
2266 return nl80211_register_frame(drv, drv->nl_handle_event,
2267 type, match, match_len);
2268 }
2269
2270
2271 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
2272 {
2273 #if defined(CONFIG_P2P) || defined(CONFIG_INTERWORKING)
2274 /* GAS Initial Request */
2275 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
2276 return -1;
2277 /* GAS Initial Response */
2278 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
2279 return -1;
2280 /* GAS Comeback Request */
2281 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
2282 return -1;
2283 /* GAS Comeback Response */
2284 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
2285 return -1;
2286 #endif /* CONFIG_P2P || CONFIG_INTERWORKING */
2287 #ifdef CONFIG_P2P
2288 /* P2P Public Action */
2289 if (nl80211_register_action_frame(drv,
2290 (u8 *) "\x04\x09\x50\x6f\x9a\x09",
2291 6) < 0)
2292 return -1;
2293 /* P2P Action */
2294 if (nl80211_register_action_frame(drv,
2295 (u8 *) "\x7f\x50\x6f\x9a\x09",
2296 5) < 0)
2297 return -1;
2298 #endif /* CONFIG_P2P */
2299 #ifdef CONFIG_IEEE80211W
2300 /* SA Query Response */
2301 if (nl80211_register_action_frame(drv, (u8 *) "\x08\x01", 2) < 0)
2302 return -1;
2303 #endif /* CONFIG_IEEE80211W */
2304
2305 /* FT Action frames */
2306 if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
2307 return -1;
2308 else
2309 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
2310 WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
2311
2312 /* WNM - BSS Transition Management Request */
2313 if (nl80211_register_action_frame(drv, (u8 *) "\x0a\x07", 2) < 0)
2314 return -1;
2315
2316 return 0;
2317 }
2318
2319
2320 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
2321 {
2322 wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
2323 }
2324
2325
2326 static int
2327 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
2328 {
2329 struct i802_bss *bss = &drv->first_bss;
2330 int send_rfkill_event = 0;
2331
2332 drv->ifindex = if_nametoindex(bss->ifname);
2333 drv->first_bss.ifindex = drv->ifindex;
2334
2335 #ifndef HOSTAPD
2336 /*
2337 * Make sure the interface starts up in station mode unless this is a
2338 * dynamically added interface (e.g., P2P) that was already configured
2339 * with proper iftype.
2340 */
2341 if ((drv->global == NULL ||
2342 drv->ifindex != drv->global->if_add_ifindex) &&
2343 wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION) < 0) {
2344 wpa_printf(MSG_ERROR, "nl80211: Could not configure driver to "
2345 "use managed mode");
2346 return -1;
2347 }
2348
2349 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
2350 if (rfkill_is_blocked(drv->rfkill)) {
2351 wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
2352 "interface '%s' due to rfkill",
2353 bss->ifname);
2354 drv->if_disabled = 1;
2355 send_rfkill_event = 1;
2356 } else {
2357 wpa_printf(MSG_ERROR, "nl80211: Could not set "
2358 "interface '%s' UP", bss->ifname);
2359 return -1;
2360 }
2361 }
2362
2363 netlink_send_oper_ifla(drv->global->netlink, drv->ifindex,
2364 1, IF_OPER_DORMANT);
2365 #endif /* HOSTAPD */
2366
2367 if (wpa_driver_nl80211_capa(drv))
2368 return -1;
2369
2370 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, drv->addr))
2371 return -1;
2372
2373 if (nl80211_register_action_frames(drv) < 0) {
2374 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
2375 "frame processing - ignore for now");
2376 /*
2377 * Older kernel versions did not support this, so ignore the
2378 * error for now. Some functionality may not be available
2379 * because of this.
2380 */
2381 }
2382
2383 if (send_rfkill_event) {
2384 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
2385 drv, drv->ctx);
2386 }
2387
2388 return 0;
2389 }
2390
2391
2392 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
2393 {
2394 struct nl_msg *msg;
2395
2396 msg = nlmsg_alloc();
2397 if (!msg)
2398 return -ENOMEM;
2399
2400 nl80211_cmd(drv, msg, 0, NL80211_CMD_DEL_BEACON);
2401 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2402
2403 return send_and_recv_msgs(drv, msg, NULL, NULL);
2404 nla_put_failure:
2405 return -ENOBUFS;
2406 }
2407
2408
2409 /**
2410 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
2411 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
2412 *
2413 * Shut down driver interface and processing of driver events. Free
2414 * private data buffer if one was allocated in wpa_driver_nl80211_init().
2415 */
2416 static void wpa_driver_nl80211_deinit(void *priv)
2417 {
2418 struct i802_bss *bss = priv;
2419 struct wpa_driver_nl80211_data *drv = bss->drv;
2420
2421 #ifdef CONFIG_AP
2422 if (drv->l2)
2423 l2_packet_deinit(drv->l2);
2424 #endif /* CONFIG_AP */
2425
2426 if (drv->nl_handle_preq)
2427 wpa_driver_nl80211_probe_req_report(bss, 0);
2428 if (bss->added_if_into_bridge) {
2429 if (linux_br_del_if(drv->ioctl_sock, bss->brname, bss->ifname)
2430 < 0)
2431 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
2432 "interface %s from bridge %s: %s",
2433 bss->ifname, bss->brname, strerror(errno));
2434 }
2435 if (bss->added_bridge) {
2436 if (linux_br_del(drv->ioctl_sock, bss->brname) < 0)
2437 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
2438 "bridge %s: %s",
2439 bss->brname, strerror(errno));
2440 }
2441
2442 nl80211_remove_monitor_interface(drv);
2443
2444 if (is_ap_interface(drv->nlmode))
2445 wpa_driver_nl80211_del_beacon(drv);
2446
2447 #ifdef HOSTAPD
2448 if (drv->last_freq_ht) {
2449 /* Clear HT flags from the driver */
2450 struct hostapd_freq_params freq;
2451 os_memset(&freq, 0, sizeof(freq));
2452 freq.freq = drv->last_freq;
2453 i802_set_freq(priv, &freq);
2454 }
2455
2456 if (drv->eapol_sock >= 0) {
2457 eloop_unregister_read_sock(drv->eapol_sock);
2458 close(drv->eapol_sock);
2459 }
2460
2461 if (drv->if_indices != drv->default_if_indices)
2462 os_free(drv->if_indices);
2463 #endif /* HOSTAPD */
2464
2465 if (drv->disable_11b_rates)
2466 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
2467
2468 netlink_send_oper_ifla(drv->global->netlink, drv->ifindex, 0,
2469 IF_OPER_UP);
2470 rfkill_deinit(drv->rfkill);
2471
2472 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
2473
2474 (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
2475 wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION);
2476
2477 if (drv->ioctl_sock >= 0)
2478 close(drv->ioctl_sock);
2479
2480 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
2481 genl_family_put(drv->nl80211);
2482 nl_cache_free(drv->nl_cache);
2483 nl_cache_free(drv->nl_cache_event);
2484 nl80211_handle_destroy(drv->nl_handle);
2485 nl80211_handle_destroy(drv->nl_handle_event);
2486 nl_cb_put(drv->nl_cb);
2487
2488 os_free(drv->filter_ssids);
2489
2490 if (drv->global)
2491 dl_list_del(&drv->list);
2492
2493 os_free(drv);
2494 }
2495
2496
2497 /**
2498 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
2499 * @eloop_ctx: Driver private data
2500 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
2501 *
2502 * This function can be used as registered timeout when starting a scan to
2503 * generate a scan completed event if the driver does not report this.
2504 */
2505 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
2506 {
2507 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2508 if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED) {
2509 wpa_driver_nl80211_set_mode(&drv->first_bss,
2510 drv->ap_scan_as_station);
2511 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
2512 }
2513 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
2514 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
2515 }
2516
2517
2518 /**
2519 * wpa_driver_nl80211_scan - Request the driver to initiate scan
2520 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2521 * @params: Scan parameters
2522 * Returns: 0 on success, -1 on failure
2523 */
2524 static int wpa_driver_nl80211_scan(void *priv,
2525 struct wpa_driver_scan_params *params)
2526 {
2527 struct i802_bss *bss = priv;
2528 struct wpa_driver_nl80211_data *drv = bss->drv;
2529 int ret = 0, timeout;
2530 struct nl_msg *msg, *ssids, *freqs, *rates;
2531 size_t i;
2532
2533 msg = nlmsg_alloc();
2534 ssids = nlmsg_alloc();
2535 freqs = nlmsg_alloc();
2536 rates = nlmsg_alloc();
2537 if (!msg || !ssids || !freqs || !rates) {
2538 nlmsg_free(msg);
2539 nlmsg_free(ssids);
2540 nlmsg_free(freqs);
2541 nlmsg_free(rates);
2542 return -1;
2543 }
2544
2545 os_free(drv->filter_ssids);
2546 drv->filter_ssids = params->filter_ssids;
2547 params->filter_ssids = NULL;
2548 drv->num_filter_ssids = params->num_filter_ssids;
2549
2550 nl80211_cmd(drv, msg, 0, NL80211_CMD_TRIGGER_SCAN);
2551
2552 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2553
2554 for (i = 0; i < params->num_ssids; i++) {
2555 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
2556 params->ssids[i].ssid,
2557 params->ssids[i].ssid_len);
2558 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
2559 params->ssids[i].ssid);
2560 }
2561 if (params->num_ssids)
2562 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
2563
2564 if (params->extra_ies) {
2565 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
2566 params->extra_ies, params->extra_ies_len);
2567 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
2568 params->extra_ies);
2569 }
2570
2571 if (params->freqs) {
2572 for (i = 0; params->freqs[i]; i++) {
2573 wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
2574 "MHz", params->freqs[i]);
2575 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
2576 }
2577 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
2578 }
2579
2580 if (params->p2p_probe) {
2581 /*
2582 * Remove 2.4 GHz rates 1, 2, 5.5, 11 Mbps from supported rates
2583 * by masking out everything else apart from the OFDM rates 6,
2584 * 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS rates. All 5 GHz
2585 * rates are left enabled.
2586 */
2587 NLA_PUT(rates, NL80211_BAND_2GHZ, 8,
2588 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
2589 nla_put_nested(msg, NL80211_ATTR_SCAN_SUPP_RATES, rates);
2590 }
2591
2592 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2593 msg = NULL;
2594 if (ret) {
2595 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
2596 "(%s)", ret, strerror(-ret));
2597 #ifdef HOSTAPD
2598 if (is_ap_interface(drv->nlmode)) {
2599 /*
2600 * mac80211 does not allow scan requests in AP mode, so
2601 * try to do this in station mode.
2602 */
2603 if (wpa_driver_nl80211_set_mode(
2604 bss, NL80211_IFTYPE_STATION))
2605 goto nla_put_failure;
2606
2607 if (wpa_driver_nl80211_scan(drv, params)) {
2608 wpa_driver_nl80211_set_mode(bss, drv->nlmode);
2609 goto nla_put_failure;
2610 }
2611
2612 /* Restore AP mode when processing scan results */
2613 drv->ap_scan_as_station = drv->nlmode;
2614 ret = 0;
2615 } else
2616 goto nla_put_failure;
2617 #else /* HOSTAPD */
2618 goto nla_put_failure;
2619 #endif /* HOSTAPD */
2620 }
2621
2622 /* Not all drivers generate "scan completed" wireless event, so try to
2623 * read results after a timeout. */
2624 timeout = 10;
2625 if (drv->scan_complete_events) {
2626 /*
2627 * The driver seems to deliver events to notify when scan is
2628 * complete, so use longer timeout to avoid race conditions
2629 * with scanning and following association request.
2630 */
2631 timeout = 30;
2632 }
2633 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
2634 "seconds", ret, timeout);
2635 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
2636 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
2637 drv, drv->ctx);
2638
2639 nla_put_failure:
2640 nlmsg_free(ssids);
2641 nlmsg_free(msg);
2642 nlmsg_free(freqs);
2643 nlmsg_free(rates);
2644 return ret;
2645 }
2646
2647
2648 /**
2649 * wpa_driver_nl80211_sched_scan - Initiate a scheduled scan
2650 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2651 * @params: Scan parameters
2652 * @interval: Interval between scan cycles in milliseconds
2653 * Returns: 0 on success, -1 on failure or if not supported
2654 */
2655 static int wpa_driver_nl80211_sched_scan(void *priv,
2656 struct wpa_driver_scan_params *params,
2657 u32 interval)
2658 {
2659 struct i802_bss *bss = priv;
2660 struct wpa_driver_nl80211_data *drv = bss->drv;
2661 int ret = 0;
2662 struct nl_msg *msg, *ssids, *freqs, *match_set_ssid, *match_sets;
2663 size_t i;
2664
2665 msg = nlmsg_alloc();
2666 ssids = nlmsg_alloc();
2667 freqs = nlmsg_alloc();
2668 if (!msg || !ssids || !freqs) {
2669 nlmsg_free(msg);
2670 nlmsg_free(ssids);
2671 nlmsg_free(freqs);
2672 return -1;
2673 }
2674
2675 os_free(drv->filter_ssids);
2676 drv->filter_ssids = params->filter_ssids;
2677 params->filter_ssids = NULL;
2678 drv->num_filter_ssids = params->num_filter_ssids;
2679
2680 nl80211_cmd(drv, msg, 0, NL80211_CMD_START_SCHED_SCAN);
2681
2682 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2683
2684 NLA_PUT_U32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL, interval);
2685
2686 if (drv->num_filter_ssids) {
2687 match_sets = nlmsg_alloc();
2688
2689 for (i = 0; i < drv->num_filter_ssids; i++) {
2690 wpa_hexdump_ascii(MSG_MSGDUMP,
2691 "nl80211: Sched scan filter SSID",
2692 drv->filter_ssids[i].ssid,
2693 drv->filter_ssids[i].ssid_len);
2694
2695 match_set_ssid = nlmsg_alloc();
2696 nla_put(match_set_ssid,
2697 NL80211_ATTR_SCHED_SCAN_MATCH_SSID,
2698 drv->filter_ssids[i].ssid_len,
2699 drv->filter_ssids[i].ssid);
2700
2701 nla_put_nested(match_sets, i + 1, match_set_ssid);
2702
2703 nlmsg_free(match_set_ssid);
2704 }
2705
2706 nla_put_nested(msg, NL80211_ATTR_SCHED_SCAN_MATCH,
2707 match_sets);
2708 nlmsg_free(match_sets);
2709 }
2710
2711 for (i = 0; i < params->num_ssids; i++) {
2712 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan SSID",
2713 params->ssids[i].ssid,
2714 params->ssids[i].ssid_len);
2715 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
2716 params->ssids[i].ssid);
2717 }
2718 if (params->num_ssids)
2719 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
2720
2721 if (params->extra_ies) {
2722 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan extra IEs",
2723 params->extra_ies, params->extra_ies_len);
2724 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
2725 params->extra_ies);
2726 }
2727
2728 if (params->freqs) {
2729 for (i = 0; params->freqs[i]; i++) {
2730 wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
2731 "MHz", params->freqs[i]);
2732 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
2733 }
2734 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
2735 }
2736
2737 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2738
2739 /* TODO: if we get an error here, we should fall back to normal scan */
2740
2741 msg = NULL;
2742 if (ret) {
2743 wpa_printf(MSG_DEBUG, "nl80211: Sched scan start failed: "
2744 "ret=%d (%s)", ret, strerror(-ret));
2745 goto nla_put_failure;
2746 }
2747
2748 wpa_printf(MSG_DEBUG, "nl80211: Sched scan requested (ret=%d) - "
2749 "scan interval %d msec", ret, interval);
2750
2751 nla_put_failure:
2752 nlmsg_free(ssids);
2753 nlmsg_free(msg);
2754 nlmsg_free(freqs);
2755 return ret;
2756 }
2757
2758
2759 /**
2760 * wpa_driver_nl80211_stop_sched_scan - Stop a scheduled scan
2761 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2762 * Returns: 0 on success, -1 on failure or if not supported
2763 */
2764 static int wpa_driver_nl80211_stop_sched_scan(void *priv)
2765 {
2766 struct i802_bss *bss = priv;
2767 struct wpa_driver_nl80211_data *drv = bss->drv;
2768 int ret = 0;
2769 struct nl_msg *msg;
2770
2771 msg = nlmsg_alloc();
2772 if (!msg)
2773 return -1;
2774
2775 nl80211_cmd(drv, msg, 0, NL80211_CMD_STOP_SCHED_SCAN);
2776
2777 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2778
2779 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2780 msg = NULL;
2781 if (ret) {
2782 wpa_printf(MSG_DEBUG, "nl80211: Sched scan stop failed: "
2783 "ret=%d (%s)", ret, strerror(-ret));
2784 goto nla_put_failure;
2785 }
2786
2787 wpa_printf(MSG_DEBUG, "nl80211: Sched scan stop sent (ret=%d)", ret);
2788
2789 nla_put_failure:
2790 nlmsg_free(msg);
2791 return ret;
2792 }
2793
2794
2795 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
2796 {
2797 const u8 *end, *pos;
2798
2799 if (ies == NULL)
2800 return NULL;
2801
2802 pos = ies;
2803 end = ies + ies_len;
2804
2805 while (pos + 1 < end) {
2806 if (pos + 2 + pos[1] > end)
2807 break;
2808 if (pos[0] == ie)
2809 return pos;
2810 pos += 2 + pos[1];
2811 }
2812
2813 return NULL;
2814 }
2815
2816
2817 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
2818 const u8 *ie, size_t ie_len)
2819 {
2820 const u8 *ssid;
2821 size_t i;
2822
2823 if (drv->filter_ssids == NULL)
2824 return 0;
2825
2826 ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
2827 if (ssid == NULL)
2828 return 1;
2829
2830 for (i = 0; i < drv->num_filter_ssids; i++) {
2831 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
2832 os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
2833 0)
2834 return 0;
2835 }
2836
2837 return 1;
2838 }
2839
2840
2841 static int bss_info_handler(struct nl_msg *msg, void *arg)
2842 {
2843 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2844 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2845 struct nlattr *bss[NL80211_BSS_MAX + 1];
2846 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2847 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
2848 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2849 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2850 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2851 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2852 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
2853 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2854 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2855 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2856 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2857 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
2858 };
2859 struct nl80211_bss_info_arg *_arg = arg;
2860 struct wpa_scan_results *res = _arg->res;
2861 struct wpa_scan_res **tmp;
2862 struct wpa_scan_res *r;
2863 const u8 *ie, *beacon_ie;
2864 size_t ie_len, beacon_ie_len;
2865 u8 *pos;
2866 size_t i;
2867
2868 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2869 genlmsg_attrlen(gnlh, 0), NULL);
2870 if (!tb[NL80211_ATTR_BSS])
2871 return NL_SKIP;
2872 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2873 bss_policy))
2874 return NL_SKIP;
2875 if (bss[NL80211_BSS_STATUS]) {
2876 enum nl80211_bss_status status;
2877 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2878 if (status == NL80211_BSS_STATUS_ASSOCIATED &&
2879 bss[NL80211_BSS_FREQUENCY]) {
2880 _arg->assoc_freq =
2881 nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2882 wpa_printf(MSG_DEBUG, "nl80211: Associated on %u MHz",
2883 _arg->assoc_freq);
2884 }
2885 if (status == NL80211_BSS_STATUS_ASSOCIATED &&
2886 bss[NL80211_BSS_BSSID]) {
2887 os_memcpy(_arg->assoc_bssid,
2888 nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
2889 wpa_printf(MSG_DEBUG, "nl80211: Associated with "
2890 MACSTR, MAC2STR(_arg->assoc_bssid));
2891 }
2892 }
2893 if (!res)
2894 return NL_SKIP;
2895 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2896 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2897 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2898 } else {
2899 ie = NULL;
2900 ie_len = 0;
2901 }
2902 if (bss[NL80211_BSS_BEACON_IES]) {
2903 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2904 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2905 } else {
2906 beacon_ie = NULL;
2907 beacon_ie_len = 0;
2908 }
2909
2910 if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2911 ie ? ie_len : beacon_ie_len))
2912 return NL_SKIP;
2913
2914 r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2915 if (r == NULL)
2916 return NL_SKIP;
2917 if (bss[NL80211_BSS_BSSID])
2918 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2919 ETH_ALEN);
2920 if (bss[NL80211_BSS_FREQUENCY])
2921 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2922 if (bss[NL80211_BSS_BEACON_INTERVAL])
2923 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2924 if (bss[NL80211_BSS_CAPABILITY])
2925 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2926 r->flags |= WPA_SCAN_NOISE_INVALID;
2927 if (bss[NL80211_BSS_SIGNAL_MBM]) {
2928 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2929 r->level /= 100; /* mBm to dBm */
2930 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2931 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2932 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2933 r->flags |= WPA_SCAN_LEVEL_INVALID;
2934 } else
2935 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2936 if (bss[NL80211_BSS_TSF])
2937 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2938 if (bss[NL80211_BSS_SEEN_MS_AGO])
2939 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2940 r->ie_len = ie_len;
2941 pos = (u8 *) (r + 1);
2942 if (ie) {
2943 os_memcpy(pos, ie, ie_len);
2944 pos += ie_len;
2945 }
2946 r->beacon_ie_len = beacon_ie_len;
2947 if (beacon_ie)
2948 os_memcpy(pos, beacon_ie, beacon_ie_len);
2949
2950 if (bss[NL80211_BSS_STATUS]) {
2951 enum nl80211_bss_status status;
2952 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2953 switch (status) {
2954 case NL80211_BSS_STATUS_AUTHENTICATED:
2955 r->flags |= WPA_SCAN_AUTHENTICATED;
2956 break;
2957 case NL80211_BSS_STATUS_ASSOCIATED:
2958 r->flags |= WPA_SCAN_ASSOCIATED;
2959 break;
2960 default:
2961 break;
2962 }
2963 }
2964
2965 /*
2966 * cfg80211 maintains separate BSS table entries for APs if the same
2967 * BSSID,SSID pair is seen on multiple channels. wpa_supplicant does
2968 * not use frequency as a separate key in the BSS table, so filter out
2969 * duplicated entries. Prefer associated BSS entry in such a case in
2970 * order to get the correct frequency into the BSS table.
2971 */
2972 for (i = 0; i < res->num; i++) {
2973 const u8 *s1, *s2;
2974 if (os_memcmp(res->res[i]->bssid, r->bssid, ETH_ALEN) != 0)
2975 continue;
2976
2977 s1 = nl80211_get_ie((u8 *) (res->res[i] + 1),
2978 res->res[i]->ie_len, WLAN_EID_SSID);
2979 s2 = nl80211_get_ie((u8 *) (r + 1), r->ie_len, WLAN_EID_SSID);
2980 if (s1 == NULL || s2 == NULL || s1[1] != s2[1] ||
2981 os_memcmp(s1, s2, 2 + s1[1]) != 0)
2982 continue;
2983
2984 /* Same BSSID,SSID was already included in scan results */
2985 wpa_printf(MSG_DEBUG, "nl80211: Remove duplicated scan result "
2986 "for " MACSTR, MAC2STR(r->bssid));
2987
2988 if ((r->flags & WPA_SCAN_ASSOCIATED) &&
2989 !(res->res[i]->flags & WPA_SCAN_ASSOCIATED)) {
2990 os_free(res->res[i]);
2991 res->res[i] = r;
2992 } else
2993 os_free(r);
2994 return NL_SKIP;
2995 }
2996
2997 tmp = os_realloc(res->res,
2998 (res->num + 1) * sizeof(struct wpa_scan_res *));
2999 if (tmp == NULL) {
3000 os_free(r);
3001 return NL_SKIP;
3002 }
3003 tmp[res->num++] = r;
3004 res->res = tmp;
3005
3006 return NL_SKIP;
3007 }
3008
3009
3010 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
3011 const u8 *addr)
3012 {
3013 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
3014 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
3015 "mismatch (" MACSTR ")", MAC2STR(addr));
3016 wpa_driver_nl80211_mlme(drv, addr,
3017 NL80211_CMD_DEAUTHENTICATE,
3018 WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
3019 }
3020 }
3021
3022
3023 static void wpa_driver_nl80211_check_bss_status(
3024 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
3025 {
3026 size_t i;
3027
3028 for (i = 0; i < res->num; i++) {
3029 struct wpa_scan_res *r = res->res[i];
3030 if (r->flags & WPA_SCAN_AUTHENTICATED) {
3031 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
3032 "indicates BSS status with " MACSTR
3033 " as authenticated",
3034 MAC2STR(r->bssid));
3035 if (is_sta_interface(drv->nlmode) &&
3036 os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
3037 os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
3038 0) {
3039 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
3040 " in local state (auth=" MACSTR
3041 " assoc=" MACSTR ")",
3042 MAC2STR(drv->auth_bssid),
3043 MAC2STR(drv->bssid));
3044 clear_state_mismatch(drv, r->bssid);
3045 }
3046 }
3047
3048 if (r->flags & WPA_SCAN_ASSOCIATED) {
3049 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
3050 "indicate BSS status with " MACSTR
3051 " as associated",
3052 MAC2STR(r->bssid));
3053 if (is_sta_interface(drv->nlmode) &&
3054 !drv->associated) {
3055 wpa_printf(MSG_DEBUG, "nl80211: Local state "
3056 "(not associated) does not match "
3057 "with BSS state");
3058 clear_state_mismatch(drv, r->bssid);
3059 } else if (is_sta_interface(drv->nlmode) &&
3060 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
3061 0) {
3062 wpa_printf(MSG_DEBUG, "nl80211: Local state "
3063 "(associated with " MACSTR ") does "
3064 "not match with BSS state",
3065 MAC2STR(drv->bssid));
3066 clear_state_mismatch(drv, r->bssid);
3067 clear_state_mismatch(drv, drv->bssid);
3068 }
3069 }
3070 }
3071 }
3072
3073
3074 static void wpa_scan_results_free(struct wpa_scan_results *res)
3075 {
3076 size_t i;
3077
3078 if (res == NULL)
3079 return;
3080
3081 for (i = 0; i < res->num; i++)
3082 os_free(res->res[i]);
3083 os_free(res->res);
3084 os_free(res);
3085 }
3086
3087
3088 static struct wpa_scan_results *
3089 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
3090 {
3091 struct nl_msg *msg;
3092 struct wpa_scan_results *res;
3093 int ret;
3094 struct nl80211_bss_info_arg arg;
3095
3096 res = os_zalloc(sizeof(*res));
3097 if (res == NULL)
3098 return NULL;
3099 msg = nlmsg_alloc();
3100 if (!msg)
3101 goto nla_put_failure;
3102
3103 nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SCAN);
3104 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3105
3106 arg.drv = drv;
3107 arg.res = res;
3108 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
3109 msg = NULL;
3110 if (ret == 0) {
3111 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
3112 (unsigned long) res->num);
3113 return res;
3114 }
3115 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
3116 "(%s)", ret, strerror(-ret));
3117 nla_put_failure:
3118 nlmsg_free(msg);
3119 wpa_scan_results_free(res);
3120 return NULL;
3121 }
3122
3123
3124 /**
3125 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
3126 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
3127 * Returns: Scan results on success, -1 on failure
3128 */
3129 static struct wpa_scan_results *
3130 wpa_driver_nl80211_get_scan_results(void *priv)
3131 {
3132 struct i802_bss *bss = priv;
3133 struct wpa_driver_nl80211_data *drv = bss->drv;
3134 struct wpa_scan_results *res;
3135
3136 res = nl80211_get_scan_results(drv);
3137 if (res)
3138 wpa_driver_nl80211_check_bss_status(drv, res);
3139 return res;
3140 }
3141
3142
3143 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
3144 {
3145 struct wpa_scan_results *res;
3146 size_t i;
3147
3148 res = nl80211_get_scan_results(drv);
3149 if (res == NULL) {
3150 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
3151 return;
3152 }
3153
3154 wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
3155 for (i = 0; i < res->num; i++) {
3156 struct wpa_scan_res *r = res->res[i];
3157 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
3158 (int) i, (int) res->num, MAC2STR(r->bssid),
3159 r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
3160 r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
3161 }
3162
3163 wpa_scan_results_free(res);
3164 }
3165
3166
3167 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
3168 enum wpa_alg alg, const u8 *addr,
3169 int key_idx, int set_tx,
3170 const u8 *seq, size_t seq_len,
3171 const u8 *key, size_t key_len)
3172 {
3173 struct i802_bss *bss = priv;
3174 struct wpa_driver_nl80211_data *drv = bss->drv;
3175 int ifindex = if_nametoindex(ifname);
3176 struct nl_msg *msg;
3177 int ret;
3178
3179 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
3180 "set_tx=%d seq_len=%lu key_len=%lu",
3181 __func__, ifindex, alg, addr, key_idx, set_tx,
3182 (unsigned long) seq_len, (unsigned long) key_len);
3183
3184 msg = nlmsg_alloc();
3185 if (!msg)
3186 return -ENOMEM;
3187
3188 if (alg == WPA_ALG_NONE) {
3189 nl80211_cmd(drv, msg, 0, NL80211_CMD_DEL_KEY);
3190 } else {
3191 nl80211_cmd(drv, msg, 0, NL80211_CMD_NEW_KEY);
3192 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
3193 switch (alg) {
3194 case WPA_ALG_WEP:
3195 if (key_len == 5)
3196 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3197 WLAN_CIPHER_SUITE_WEP40);
3198 else
3199 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3200 WLAN_CIPHER_SUITE_WEP104);
3201 break;
3202 case WPA_ALG_TKIP:
3203 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3204 WLAN_CIPHER_SUITE_TKIP);
3205 break;
3206 case WPA_ALG_CCMP:
3207 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3208 WLAN_CIPHER_SUITE_CCMP);
3209 break;
3210 case WPA_ALG_IGTK:
3211 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3212 WLAN_CIPHER_SUITE_AES_CMAC);
3213 break;
3214 default:
3215 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
3216 "algorithm %d", __func__, alg);
3217 nlmsg_free(msg);
3218 return -1;
3219 }
3220 }
3221
3222 if (seq && seq_len)
3223 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
3224
3225 if (addr && !is_broadcast_ether_addr(addr)) {
3226 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
3227 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3228
3229 if (alg != WPA_ALG_WEP && key_idx && !set_tx) {
3230 wpa_printf(MSG_DEBUG, " RSN IBSS RX GTK");
3231 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE,
3232 NL80211_KEYTYPE_GROUP);
3233 }
3234 } else if (addr && is_broadcast_ether_addr(addr)) {
3235 struct nl_msg *types;
3236 int err;
3237 wpa_printf(MSG_DEBUG, " broadcast key");
3238 types = nlmsg_alloc();
3239 if (!types)
3240 goto nla_put_failure;
3241 NLA_PUT_FLAG(types, NL80211_KEY_DEFAULT_TYPE_MULTICAST);
3242 err = nla_put_nested(msg, NL80211_ATTR_KEY_DEFAULT_TYPES,
3243 types);
3244 nlmsg_free(types);
3245 if (err)
3246 goto nla_put_failure;
3247 }
3248 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
3249 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3250
3251 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3252 if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
3253 ret = 0;
3254 if (ret)
3255 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
3256 ret, strerror(-ret));
3257
3258 /*
3259 * If we failed or don't need to set the default TX key (below),
3260 * we're done here.
3261 */
3262 if (ret || !set_tx || alg == WPA_ALG_NONE)
3263 return ret;
3264 if (is_ap_interface(drv->nlmode) && addr &&
3265 !is_broadcast_ether_addr(addr))
3266 return ret;
3267
3268 msg = nlmsg_alloc();
3269 if (!msg)
3270 return -ENOMEM;
3271
3272 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_KEY);
3273 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
3274 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3275 if (alg == WPA_ALG_IGTK)
3276 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
3277 else
3278 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
3279 if (addr && is_broadcast_ether_addr(addr)) {
3280 struct nl_msg *types;
3281 int err;
3282 types = nlmsg_alloc();
3283 if (!types)
3284 goto nla_put_failure;
3285 NLA_PUT_FLAG(types, NL80211_KEY_DEFAULT_TYPE_MULTICAST);
3286 err = nla_put_nested(msg, NL80211_ATTR_KEY_DEFAULT_TYPES,
3287 types);
3288 nlmsg_free(types);
3289 if (err)
3290 goto nla_put_failure;
3291 } else if (addr) {
3292 struct nl_msg *types;
3293 int err;
3294 types = nlmsg_alloc();
3295 if (!types)
3296 goto nla_put_failure;
3297 NLA_PUT_FLAG(types, NL80211_KEY_DEFAULT_TYPE_UNICAST);
3298 err = nla_put_nested(msg, NL80211_ATTR_KEY_DEFAULT_TYPES,
3299 types);
3300 nlmsg_free(types);
3301 if (err)
3302 goto nla_put_failure;
3303 }
3304
3305 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3306 if (ret == -ENOENT)
3307 ret = 0;
3308 if (ret)
3309 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
3310 "err=%d %s)", ret, strerror(-ret));
3311 return ret;
3312
3313 nla_put_failure:
3314 return -ENOBUFS;
3315 }
3316
3317
3318 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
3319 int key_idx, int defkey,
3320 const u8 *seq, size_t seq_len,
3321 const u8 *key, size_t key_len)
3322 {
3323 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
3324 if (!key_attr)
3325 return -1;
3326
3327 if (defkey && alg == WPA_ALG_IGTK)
3328 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
3329 else if (defkey)
3330 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
3331
3332 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
3333
3334 switch (alg) {
3335 case WPA_ALG_WEP:
3336 if (key_len == 5)
3337 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3338 WLAN_CIPHER_SUITE_WEP40);
3339 else
3340 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3341 WLAN_CIPHER_SUITE_WEP104);
3342 break;
3343 case WPA_ALG_TKIP:
3344 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
3345 break;
3346 case WPA_ALG_CCMP:
3347 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
3348 break;
3349 case WPA_ALG_IGTK:
3350 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3351 WLAN_CIPHER_SUITE_AES_CMAC);
3352 break;
3353 default:
3354 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
3355 "algorithm %d", __func__, alg);
3356 return -1;
3357 }
3358
3359 if (seq && seq_len)
3360 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
3361
3362 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
3363
3364 nla_nest_end(msg, key_attr);
3365
3366 return 0;
3367 nla_put_failure:
3368 return -1;
3369 }
3370
3371
3372 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
3373 struct nl_msg *msg)
3374 {
3375 int i, privacy = 0;
3376 struct nlattr *nl_keys, *nl_key;
3377
3378 for (i = 0; i < 4; i++) {
3379 if (!params->wep_key[i])
3380 continue;
3381 privacy = 1;
3382 break;
3383 }
3384 if (params->wps == WPS_MODE_PRIVACY)
3385 privacy = 1;
3386 if (params->pairwise_suite &&
3387 params->pairwise_suite != WPA_CIPHER_NONE)
3388 privacy = 1;
3389
3390 if (!privacy)
3391 return 0;
3392
3393 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
3394
3395 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
3396 if (!nl_keys)
3397 goto nla_put_failure;
3398
3399 for (i = 0; i < 4; i++) {
3400 if (!params->wep_key[i])
3401 continue;
3402
3403 nl_key = nla_nest_start(msg, i);
3404 if (!nl_key)
3405 goto nla_put_failure;
3406
3407 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
3408 params->wep_key[i]);
3409 if (params->wep_key_len[i] == 5)
3410 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3411 WLAN_CIPHER_SUITE_WEP40);
3412 else
3413 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3414 WLAN_CIPHER_SUITE_WEP104);
3415
3416 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
3417
3418 if (i == params->wep_tx_keyidx)
3419 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
3420
3421 nla_nest_end(msg, nl_key);
3422 }
3423 nla_nest_end(msg, nl_keys);
3424
3425 return 0;
3426
3427 nla_put_failure:
3428 return -ENOBUFS;
3429 }
3430
3431
3432 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
3433 const u8 *addr, int cmd, u16 reason_code,
3434 int local_state_change)
3435 {
3436 int ret = -1;
3437 struct nl_msg *msg;
3438
3439 msg = nlmsg_alloc();
3440 if (!msg)
3441 return -1;
3442
3443 nl80211_cmd(drv, msg, 0, cmd);
3444
3445 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3446 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
3447 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3448 if (local_state_change)
3449 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
3450
3451 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3452 msg = NULL;
3453 if (ret) {
3454 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3455 "(%s)", ret, strerror(-ret));
3456 goto nla_put_failure;
3457 }
3458 ret = 0;
3459
3460 nla_put_failure:
3461 nlmsg_free(msg);
3462 return ret;
3463 }
3464
3465
3466 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
3467 const u8 *addr, int reason_code)
3468 {
3469 wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
3470 __func__, MAC2STR(addr), reason_code);
3471 drv->associated = 0;
3472 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
3473 reason_code, 0);
3474 }
3475
3476
3477 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
3478 int reason_code)
3479 {
3480 struct i802_bss *bss = priv;
3481 struct wpa_driver_nl80211_data *drv = bss->drv;
3482 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3483 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
3484 wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
3485 __func__, MAC2STR(addr), reason_code);
3486 drv->associated = 0;
3487 if (drv->nlmode == NL80211_IFTYPE_ADHOC)
3488 return nl80211_leave_ibss(drv);
3489 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
3490 reason_code, 0);
3491 }
3492
3493
3494 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
3495 int reason_code)
3496 {
3497 struct i802_bss *bss = priv;
3498 struct wpa_driver_nl80211_data *drv = bss->drv;
3499 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3500 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
3501 wpa_printf(MSG_DEBUG, "%s", __func__);
3502 drv->associated = 0;
3503 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
3504 reason_code, 0);
3505 }
3506
3507
3508 static int wpa_driver_nl80211_authenticate(
3509 void *priv, struct wpa_driver_auth_params *params)
3510 {
3511 struct i802_bss *bss = priv;
3512 struct wpa_driver_nl80211_data *drv = bss->drv;
3513 int ret = -1, i;
3514 struct nl_msg *msg;
3515 enum nl80211_auth_type type;
3516 enum nl80211_iftype nlmode;
3517 int count = 0;
3518
3519 drv->associated = 0;
3520 os_memset(drv->auth_bssid, 0, ETH_ALEN);
3521 /* FIX: IBSS mode */
3522 nlmode = params->p2p ?
3523 NL80211_IFTYPE_P2P_CLIENT : NL80211_IFTYPE_STATION;
3524 if (drv->nlmode != nlmode &&
3525 wpa_driver_nl80211_set_mode(priv, nlmode) < 0)
3526 return -1;
3527
3528 retry:
3529 msg = nlmsg_alloc();
3530 if (!msg)
3531 return -1;
3532
3533 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
3534 drv->ifindex);
3535
3536 nl80211_cmd(drv, msg, 0, NL80211_CMD_AUTHENTICATE);
3537
3538 for (i = 0; i < 4; i++) {
3539 if (!params->wep_key[i])
3540 continue;
3541 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
3542 NULL, i,
3543 i == params->wep_tx_keyidx, NULL, 0,
3544 params->wep_key[i],
3545 params->wep_key_len[i]);
3546 if (params->wep_tx_keyidx != i)
3547 continue;
3548 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
3549 params->wep_key[i], params->wep_key_len[i])) {
3550 nlmsg_free(msg);
3551 return -1;
3552 }
3553 }
3554
3555 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3556 if (params->bssid) {
3557 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3558 MAC2STR(params->bssid));
3559 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3560 }
3561 if (params->freq) {
3562 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3563 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3564 }
3565 if (params->ssid) {
3566 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3567 params->ssid, params->ssid_len);
3568 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3569 params->ssid);
3570 }
3571 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
3572 if (params->ie)
3573 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
3574 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3575 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3576 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3577 type = NL80211_AUTHTYPE_SHARED_KEY;
3578 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3579 type = NL80211_AUTHTYPE_NETWORK_EAP;
3580 else if (params->auth_alg & WPA_AUTH_ALG_FT)
3581 type = NL80211_AUTHTYPE_FT;
3582 else
3583 goto nla_put_failure;
3584 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3585 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3586 if (params->local_state_change) {
3587 wpa_printf(MSG_DEBUG, " * Local state change only");
3588 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
3589 }
3590
3591 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3592 msg = NULL;
3593 if (ret) {
3594 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3595 "(%s)", ret, strerror(-ret));
3596 count++;
3597 if (ret == -EALREADY && count == 1 && params->bssid &&
3598 !params->local_state_change) {
3599 /*
3600 * mac80211 does not currently accept new
3601 * authentication if we are already authenticated. As a
3602 * workaround, force deauthentication and try again.
3603 */
3604 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
3605 "after forced deauthentication");
3606 wpa_driver_nl80211_deauthenticate(
3607 bss, params->bssid,
3608 WLAN_REASON_PREV_AUTH_NOT_VALID);
3609 nlmsg_free(msg);
3610 goto retry;
3611 }
3612 goto nla_put_failure;
3613 }
3614 ret = 0;
3615 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
3616 "successfully");
3617
3618 nla_put_failure:
3619 nlmsg_free(msg);
3620 return ret;
3621 }
3622
3623
3624 struct phy_info_arg {
3625 u16 *num_modes;
3626 struct hostapd_hw_modes *modes;
3627 };
3628
3629 static int phy_info_handler(struct nl_msg *msg, void *arg)
3630 {
3631 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
3632 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3633 struct phy_info_arg *phy_info = arg;
3634
3635 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
3636
3637 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
3638 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
3639 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
3640 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
3641 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
3642 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
3643 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
3644 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
3645 };
3646
3647 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
3648 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
3649 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
3650 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
3651 };
3652
3653 struct nlattr *nl_band;
3654 struct nlattr *nl_freq;
3655 struct nlattr *nl_rate;
3656 int rem_band, rem_freq, rem_rate;
3657 struct hostapd_hw_modes *mode;
3658 int idx, mode_is_set;
3659
3660 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3661 genlmsg_attrlen(gnlh, 0), NULL);
3662
3663 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
3664 return NL_SKIP;
3665
3666 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
3667 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
3668 if (!mode)
3669 return NL_SKIP;
3670 phy_info->modes = mode;
3671
3672 mode_is_set = 0;
3673
3674 mode = &phy_info->modes[*(phy_info->num_modes)];
3675 memset(mode, 0, sizeof(*mode));
3676 *(phy_info->num_modes) += 1;
3677
3678 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
3679 nla_len(nl_band), NULL);
3680
3681 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
3682 mode->ht_capab = nla_get_u16(
3683 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
3684 }
3685
3686 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
3687 mode->a_mpdu_params |= nla_get_u8(
3688 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
3689 0x03;
3690 }
3691
3692 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
3693 mode->a_mpdu_params |= nla_get_u8(
3694 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
3695 2;
3696 }
3697
3698 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
3699 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
3700 u8 *mcs;
3701 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
3702 os_memcpy(mode->mcs_set, mcs, 16);
3703 }
3704
3705 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3706 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3707 nla_len(nl_freq), freq_policy);
3708 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3709 continue;
3710 mode->num_channels++;
3711 }
3712
3713 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
3714 if (!mode->channels)
3715 return NL_SKIP;
3716
3717 idx = 0;
3718
3719 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3720 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3721 nla_len(nl_freq), freq_policy);
3722 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3723 continue;
3724
3725 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
3726 mode->channels[idx].flag = 0;
3727
3728 if (!mode_is_set) {
3729 /* crude heuristic */
3730 if (mode->channels[idx].freq < 4000)
3731 mode->mode = HOSTAPD_MODE_IEEE80211B;
3732 else
3733 mode->mode = HOSTAPD_MODE_IEEE80211A;
3734 mode_is_set = 1;
3735 }
3736
3737 /* crude heuristic */
3738 if (mode->channels[idx].freq < 4000)
3739 if (mode->channels[idx].freq == 2484)
3740 mode->channels[idx].chan = 14;
3741 else
3742 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
3743 else
3744 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
3745
3746 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3747 mode->channels[idx].flag |=
3748 HOSTAPD_CHAN_DISABLED;
3749 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
3750 mode->channels[idx].flag |=
3751 HOSTAPD_CHAN_PASSIVE_SCAN;
3752 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
3753 mode->channels[idx].flag |=
3754 HOSTAPD_CHAN_NO_IBSS;
3755 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
3756 mode->channels[idx].flag |=
3757 HOSTAPD_CHAN_RADAR;
3758
3759 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
3760 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3761 mode->channels[idx].max_tx_power =
3762 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
3763
3764 idx++;
3765 }
3766
3767 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3768 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3769 nla_len(nl_rate), rate_policy);
3770 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
3771 continue;
3772 mode->num_rates++;
3773 }
3774
3775 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
3776 if (!mode->rates)
3777 return NL_SKIP;
3778
3779 idx = 0;
3780
3781 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3782 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3783 nla_len(nl_rate), rate_policy);
3784 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
3785 continue;
3786 mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
3787
3788 /* crude heuristic */
3789 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
3790 mode->rates[idx] > 200)
3791 mode->mode = HOSTAPD_MODE_IEEE80211G;
3792
3793 idx++;
3794 }
3795 }
3796
3797 return NL_SKIP;
3798 }
3799
3800 static struct hostapd_hw_modes *
3801 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
3802 {
3803 u16 m;
3804 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
3805 int i, mode11g_idx = -1;
3806
3807 /* If only 802.11g mode is included, use it to construct matching
3808 * 802.11b mode data. */
3809
3810 for (m = 0; m < *num_modes; m++) {
3811 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
3812 return modes; /* 802.11b already included */
3813 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
3814 mode11g_idx = m;
3815 }
3816
3817 if (mode11g_idx < 0)
3818 return modes; /* 2.4 GHz band not supported at all */
3819
3820 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
3821 if (nmodes == NULL)
3822 return modes; /* Could not add 802.11b mode */
3823
3824 mode = &nmodes[*num_modes];
3825 os_memset(mode, 0, sizeof(*mode));
3826 (*num_modes)++;
3827 modes = nmodes;
3828
3829 mode->mode = HOSTAPD_MODE_IEEE80211B;
3830
3831 mode11g = &modes[mode11g_idx];
3832 mode->num_channels = mode11g->num_channels;
3833 mode->channels = os_malloc(mode11g->num_channels *
3834 sizeof(struct hostapd_channel_data));
3835 if (mode->channels == NULL) {
3836 (*num_modes)--;
3837 return modes; /* Could not add 802.11b mode */
3838 }
3839 os_memcpy(mode->channels, mode11g->channels,
3840 mode11g->num_channels * sizeof(struct hostapd_channel_data));
3841
3842 mode->num_rates = 0;
3843 mode->rates = os_malloc(4 * sizeof(int));
3844 if (mode->rates == NULL) {
3845 os_free(mode->channels);
3846 (*num_modes)--;
3847 return modes; /* Could not add 802.11b mode */
3848 }
3849
3850 for (i = 0; i < mode11g->num_rates; i++) {
3851 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
3852 mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
3853 continue;
3854 mode->rates[mode->num_rates] = mode11g->rates[i];
3855 mode->num_rates++;
3856 if (mode->num_rates == 4)
3857 break;
3858 }
3859
3860 if (mode->num_rates == 0) {
3861 os_free(mode->channels);
3862 os_free(mode->rates);
3863 (*num_modes)--;
3864 return modes; /* No 802.11b rates */
3865 }
3866
3867 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
3868 "information");
3869
3870 return modes;
3871 }
3872
3873
3874 static void nl80211_set_ht40_mode(struct hostapd_hw_modes *mode, int start,
3875 int end)
3876 {
3877 int c;
3878
3879 for (c = 0; c < mode->num_channels; c++) {
3880 struct hostapd_channel_data *chan = &mode->channels[c];
3881 if (chan->freq - 10 >= start && chan->freq + 10 <= end)
3882 chan->flag |= HOSTAPD_CHAN_HT40;
3883 }
3884 }
3885
3886
3887 static void nl80211_set_ht40_mode_sec(struct hostapd_hw_modes *mode, int start,
3888 int end)
3889 {
3890 int c;
3891
3892 for (c = 0; c < mode->num_channels; c++) {
3893 struct hostapd_channel_data *chan = &mode->channels[c];
3894 if (!(chan->flag & HOSTAPD_CHAN_HT40))
3895 continue;
3896 if (chan->freq - 30 >= start && chan->freq - 10 <= end)
3897 chan->flag |= HOSTAPD_CHAN_HT40MINUS;
3898 if (chan->freq + 10 >= start && chan->freq + 30 <= end)
3899 chan->flag |= HOSTAPD_CHAN_HT40PLUS;
3900 }
3901 }
3902
3903
3904 static void nl80211_reg_rule_ht40(struct nlattr *tb[],
3905 struct phy_info_arg *results)
3906 {
3907 u32 start, end, max_bw;
3908 u16 m;
3909
3910 if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
3911 tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
3912 tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
3913 return;
3914
3915 start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
3916 end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
3917 max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
3918
3919 wpa_printf(MSG_DEBUG, "nl80211: %u-%u @ %u MHz",
3920 start, end, max_bw);
3921 if (max_bw < 40)
3922 return;
3923
3924 for (m = 0; m < *results->num_modes; m++) {
3925 if (!(results->modes[m].ht_capab &
3926 HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
3927 continue;
3928 nl80211_set_ht40_mode(&results->modes[m], start, end);
3929 }
3930 }
3931
3932
3933 static void nl80211_reg_rule_sec(struct nlattr *tb[],
3934 struct phy_info_arg *results)
3935 {
3936 u32 start, end, max_bw;
3937 u16 m;
3938
3939 if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
3940 tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
3941 tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
3942 return;
3943
3944 start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
3945 end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
3946 max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
3947
3948 if (max_bw < 20)
3949 return;
3950
3951 for (m = 0; m < *results->num_modes; m++) {
3952 if (!(results->modes[m].ht_capab &
3953 HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
3954 continue;
3955 nl80211_set_ht40_mode_sec(&results->modes[m], start, end);
3956 }
3957 }
3958
3959
3960 static int nl80211_get_reg(struct nl_msg *msg, void *arg)
3961 {
3962 struct phy_info_arg *results = arg;
3963 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
3964 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3965 struct nlattr *nl_rule;
3966 struct nlattr *tb_rule[NL80211_FREQUENCY_ATTR_MAX + 1];
3967 int rem_rule;
3968 static struct nla_policy reg_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
3969 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
3970 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
3971 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
3972 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
3973 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
3974 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
3975 };
3976
3977 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3978 genlmsg_attrlen(gnlh, 0), NULL);
3979 if (!tb_msg[NL80211_ATTR_REG_ALPHA2] ||
3980 !tb_msg[NL80211_ATTR_REG_RULES]) {
3981 wpa_printf(MSG_DEBUG, "nl80211: No regulatory information "
3982 "available");
3983 return NL_SKIP;
3984 }
3985
3986 wpa_printf(MSG_DEBUG, "nl80211: Regulatory information - country=%s",
3987 (char *) nla_data(tb_msg[NL80211_ATTR_REG_ALPHA2]));
3988
3989 nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
3990 {
3991 nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
3992 nla_data(nl_rule), nla_len(nl_rule), reg_policy);
3993 nl80211_reg_rule_ht40(tb_rule, results);
3994 }
3995
3996 nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
3997 {
3998 nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
3999 nla_data(nl_rule), nla_len(nl_rule), reg_policy);
4000 nl80211_reg_rule_sec(tb_rule, results);
4001 }
4002
4003 return NL_SKIP;
4004 }
4005
4006
4007 static int nl80211_set_ht40_flags(struct wpa_driver_nl80211_data *drv,
4008 struct phy_info_arg *results)
4009 {
4010 struct nl_msg *msg;
4011
4012 msg = nlmsg_alloc();
4013 if (!msg)
4014 return -ENOMEM;
4015
4016 nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_REG);
4017 return send_and_recv_msgs(drv, msg, nl80211_get_reg, results);
4018 }
4019
4020
4021 static struct hostapd_hw_modes *
4022 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
4023 {
4024 struct i802_bss *bss = priv;
4025 struct wpa_driver_nl80211_data *drv = bss->drv;
4026 struct nl_msg *msg;
4027 struct phy_info_arg result = {
4028 .num_modes = num_modes,
4029 .modes = NULL,
4030 };
4031
4032 *num_modes = 0;
4033 *flags = 0;
4034
4035 msg = nlmsg_alloc();
4036 if (!msg)
4037 return NULL;
4038
4039 nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_WIPHY);
4040
4041 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4042
4043 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0) {
4044 nl80211_set_ht40_flags(drv, &result);
4045 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
4046 }
4047 nla_put_failure:
4048 return NULL;
4049 }
4050
4051
4052 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
4053 const void *data, size_t len,
4054 int encrypt)
4055 {
4056 __u8 rtap_hdr[] = {
4057 0x00, 0x00, /* radiotap version */
4058 0x0e, 0x00, /* radiotap length */
4059 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
4060 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
4061 0x00, /* padding */
4062 0x00, 0x00, /* RX and TX flags to indicate that */
4063 0x00, 0x00, /* this is the injected frame directly */
4064 };
4065 struct iovec iov[2] = {
4066 {
4067 .iov_base = &rtap_hdr,
4068 .iov_len = sizeof(rtap_hdr),
4069 },
4070 {
4071 .iov_base = (void *) data,
4072 .iov_len = len,
4073 }
4074 };
4075 struct msghdr msg = {
4076 .msg_name = NULL,
4077 .msg_namelen = 0,
4078 .msg_iov = iov,
4079 .msg_iovlen = 2,
4080 .msg_control = NULL,
4081 .msg_controllen = 0,
4082 .msg_flags = 0,
4083 };
4084 int res;
4085
4086 if (encrypt)
4087 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
4088
4089 if (drv->monitor_sock < 0) {
4090 wpa_printf(MSG_DEBUG, "nl80211: No monitor socket available "
4091 "for %s", __func__);
4092 return -1;
4093 }
4094
4095 res = sendmsg(drv->monitor_sock, &msg, 0);
4096 if (res < 0) {
4097 wpa_printf(MSG_INFO, "nl80211: sendmsg: %s", strerror(errno));
4098 return -1;
4099 }
4100 return 0;
4101 }
4102
4103
4104 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
4105 size_t data_len)
4106 {
4107 struct i802_bss *bss = priv;
4108 struct wpa_driver_nl80211_data *drv = bss->drv;
4109 struct ieee80211_mgmt *mgmt;
4110 int encrypt = 1;
4111 u16 fc;
4112
4113 mgmt = (struct ieee80211_mgmt *) data;
4114 fc = le_to_host16(mgmt->frame_control);
4115
4116 if (is_sta_interface(drv->nlmode) &&
4117 WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
4118 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
4119 /*
4120 * The use of last_mgmt_freq is a bit of a hack,
4121 * but it works due to the single-threaded nature
4122 * of wpa_supplicant.
4123 */
4124 return nl80211_send_frame_cmd(drv, drv->last_mgmt_freq, 0,
4125 data, data_len, NULL);
4126 }
4127
4128 if (drv->no_monitor_iface_capab && is_ap_interface(drv->nlmode)) {
4129 return nl80211_send_frame_cmd(drv, drv->ap_oper_freq, 0,
4130 data, data_len, NULL);
4131 }
4132
4133 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
4134 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
4135 /*
4136 * Only one of the authentication frame types is encrypted.
4137 * In order for static WEP encryption to work properly (i.e.,
4138 * to not encrypt the frame), we need to tell mac80211 about
4139 * the frames that must not be encrypted.
4140 */
4141 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
4142 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
4143 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
4144 encrypt = 0;
4145 }
4146
4147 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
4148 }
4149
4150
4151 static int nl80211_set_ap_isolate(struct i802_bss *bss, int enabled)
4152 {
4153 struct wpa_driver_nl80211_data *drv = bss->drv;
4154 struct nl_msg *msg;
4155
4156 msg = nlmsg_alloc();
4157 if (!msg)
4158 return -ENOMEM;
4159
4160 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_BSS);
4161
4162 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4163 NLA_PUT_U8(msg, NL80211_ATTR_AP_ISOLATE, enabled);
4164
4165 return send_and_recv_msgs(drv, msg, NULL, NULL);
4166 nla_put_failure:
4167 return -ENOBUFS;
4168 }
4169
4170
4171 static int nl80211_set_bss(struct i802_bss *bss, int cts, int preamble,
4172 int slot, int ht_opmode)
4173 {
4174 struct wpa_driver_nl80211_data *drv = bss->drv;
4175 struct nl_msg *msg;
4176
4177 msg = nlmsg_alloc();
4178 if (!msg)
4179 return -ENOMEM;
4180
4181 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_BSS);
4182
4183 if (cts >= 0)
4184 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4185 if (preamble >= 0)
4186 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4187 if (slot >= 0)
4188 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4189 if (ht_opmode >= 0)
4190 NLA_PUT_U16(msg, NL80211_ATTR_BSS_HT_OPMODE, ht_opmode);
4191 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4192
4193 return send_and_recv_msgs(drv, msg, NULL, NULL);
4194 nla_put_failure:
4195 return -ENOBUFS;
4196 }
4197
4198
4199 static int wpa_driver_nl80211_set_ap(void *priv,
4200 struct wpa_driver_ap_params *params)
4201 {
4202 struct i802_bss *bss = priv;
4203 struct wpa_driver_nl80211_data *drv = bss->drv;
4204 struct nl_msg *msg;
4205 u8 cmd = NL80211_CMD_NEW_BEACON;
4206 int ret;
4207 int beacon_set;
4208 int ifindex = if_nametoindex(bss->ifname);
4209 int num_suites;
4210 u32 suites[10];
4211 u32 ver;
4212
4213 beacon_set = bss->beacon_set;
4214
4215 msg = nlmsg_alloc();
4216 if (!msg)
4217 return -ENOMEM;
4218
4219 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
4220 beacon_set);
4221 if (beacon_set)
4222 cmd = NL80211_CMD_SET_BEACON;
4223
4224 nl80211_cmd(drv, msg, 0, cmd);
4225 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, params->head_len, params->head);
4226 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, params->tail_len, params->tail);
4227 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4228 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, params->beacon_int);
4229 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, params->dtim_period);
4230 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4231 params->ssid);
4232 switch (params->hide_ssid) {
4233 case NO_SSID_HIDING:
4234 NLA_PUT_U32(msg, NL80211_ATTR_HIDDEN_SSID,
4235 NL80211_HIDDEN_SSID_NOT_IN_USE);
4236 break;
4237 case HIDDEN_SSID_ZERO_LEN:
4238 NLA_PUT_U32(msg, NL80211_ATTR_HIDDEN_SSID,
4239 NL80211_HIDDEN_SSID_ZERO_LEN);
4240 break;
4241 case HIDDEN_SSID_ZERO_CONTENTS:
4242 NLA_PUT_U32(msg, NL80211_ATTR_HIDDEN_SSID,
4243 NL80211_HIDDEN_SSID_ZERO_CONTENTS);
4244 break;
4245 }
4246 if (params->privacy)
4247 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
4248 if ((params->auth_algs & (WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED)) ==
4249 (WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED)) {
4250 /* Leave out the attribute */
4251 } else if (params->auth_algs & WPA_AUTH_ALG_SHARED)
4252 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE,
4253 NL80211_AUTHTYPE_SHARED_KEY);
4254 else
4255 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE,
4256 NL80211_AUTHTYPE_OPEN_SYSTEM);
4257
4258 ver = 0;
4259 if (params->wpa_version & WPA_PROTO_WPA)
4260 ver |= NL80211_WPA_VERSION_1;
4261 if (params->wpa_version & WPA_PROTO_RSN)
4262 ver |= NL80211_WPA_VERSION_2;
4263 if (ver)
4264 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
4265
4266 num_suites = 0;
4267 if (params->key_mgmt_suites & WPA_KEY_MGMT_IEEE8021X)
4268 suites[num_suites++] = WLAN_AKM_SUITE_8021X;
4269 if (params->key_mgmt_suites & WPA_KEY_MGMT_PSK)
4270 suites[num_suites++] = WLAN_AKM_SUITE_PSK;
4271 if (num_suites) {
4272 NLA_PUT(msg, NL80211_ATTR_AKM_SUITES,
4273 num_suites * sizeof(u32), suites);
4274 }
4275
4276 num_suites = 0;
4277 if (params->pairwise_ciphers & WPA_CIPHER_CCMP)
4278 suites[num_suites++] = WLAN_CIPHER_SUITE_CCMP;
4279 if (params->pairwise_ciphers & WPA_CIPHER_TKIP)
4280 suites[num_suites++] = WLAN_CIPHER_SUITE_TKIP;
4281 if (params->pairwise_ciphers & WPA_CIPHER_WEP104)
4282 suites[num_suites++] = WLAN_CIPHER_SUITE_WEP104;
4283 if (params->pairwise_ciphers & WPA_CIPHER_WEP40)
4284 suites[num_suites++] = WLAN_CIPHER_SUITE_WEP40;
4285 if (num_suites) {
4286 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
4287 num_suites * sizeof(u32), suites);
4288 }
4289
4290 switch (params->group_cipher) {
4291 case WPA_CIPHER_CCMP:
4292 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4293 WLAN_CIPHER_SUITE_CCMP);
4294 break;
4295 case WPA_CIPHER_TKIP:
4296 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4297 WLAN_CIPHER_SUITE_TKIP);
4298 break;
4299 case WPA_CIPHER_WEP104:
4300 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4301 WLAN_CIPHER_SUITE_WEP104);
4302 break;
4303 case WPA_CIPHER_WEP40:
4304 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4305 WLAN_CIPHER_SUITE_WEP40);
4306 break;
4307 }
4308
4309 if (params->beacon_ies) {
4310 NLA_PUT(msg, NL80211_ATTR_IE, wpabuf_len(params->beacon_ies),
4311 wpabuf_head(params->beacon_ies));
4312 }
4313 if (params->proberesp_ies) {
4314 NLA_PUT(msg, NL80211_ATTR_IE_PROBE_RESP,
4315 wpabuf_len(params->proberesp_ies),
4316 wpabuf_head(params->proberesp_ies));
4317 }
4318 if (params->assocresp_ies) {
4319 NLA_PUT(msg, NL80211_ATTR_IE_ASSOC_RESP,
4320 wpabuf_len(params->assocresp_ies),
4321 wpabuf_head(params->assocresp_ies));
4322 }
4323
4324 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4325 if (ret) {
4326 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
4327 ret, strerror(-ret));
4328 } else {
4329 bss->beacon_set = 1;
4330 ret = nl80211_set_ap_isolate(bss, params->isolate);
4331 if (!params->isolate && ret) {
4332 wpa_printf(MSG_DEBUG, "nl80211: Ignore AP isolation "
4333 "configuration error since isolation is "
4334 "not used");
4335 ret = 0;
4336 }
4337
4338 nl80211_set_bss(bss, params->cts_protect, params->preamble,
4339 params->short_slot_time, params->ht_opmode);
4340 }
4341 return ret;
4342 nla_put_failure:
4343 return -ENOBUFS;
4344 }
4345
4346
4347 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
4348 int freq, int ht_enabled,
4349 int sec_channel_offset)
4350 {
4351 struct nl_msg *msg;
4352 int ret;
4353
4354 wpa_printf(MSG_DEBUG, "nl80211: Set freq %d (ht_enabled=%d "
4355 "sec_channel_offset=%d)",
4356 freq, ht_enabled, sec_channel_offset);
4357 msg = nlmsg_alloc();
4358 if (!msg)
4359 return -1;
4360
4361 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_WIPHY);
4362
4363 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4364 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4365 if (ht_enabled) {
4366 switch (sec_channel_offset) {
4367 case -1:
4368 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
4369 NL80211_CHAN_HT40MINUS);
4370 break;
4371 case 1:
4372 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
4373 NL80211_CHAN_HT40PLUS);
4374 break;
4375 default:
4376 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
4377 NL80211_CHAN_HT20);
4378 break;
4379 }
4380 }
4381
4382 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4383 if (ret == 0)
4384 return 0;
4385 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
4386 "%d (%s)", freq, ret, strerror(-ret));
4387 nla_put_failure:
4388 return -1;
4389 }
4390
4391
4392 static u32 sta_flags_nl80211(int flags)
4393 {
4394 u32 f = 0;
4395
4396 if (flags & WPA_STA_AUTHORIZED)
4397 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
4398 if (flags & WPA_STA_WMM)
4399 f |= BIT(NL80211_STA_FLAG_WME);
4400 if (flags & WPA_STA_SHORT_PREAMBLE)
4401 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
4402 if (flags & WPA_STA_MFP)
4403 f |= BIT(NL80211_STA_FLAG_MFP);
4404
4405 return f;
4406 }
4407
4408
4409 static int wpa_driver_nl80211_sta_add(void *priv,
4410 struct hostapd_sta_add_params *params)
4411 {
4412 struct i802_bss *bss = priv;
4413 struct wpa_driver_nl80211_data *drv = bss->drv;
4414 struct nl_msg *msg;
4415 struct nl80211_sta_flag_update upd;
4416 int ret = -ENOBUFS;
4417
4418 msg = nlmsg_alloc();
4419 if (!msg)
4420 return -ENOMEM;
4421
4422 nl80211_cmd(drv, msg, 0, NL80211_CMD_NEW_STATION);
4423
4424 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4425 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
4426 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
4427 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
4428 params->supp_rates);
4429 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
4430 params->listen_interval);
4431 if (params->ht_capabilities) {
4432 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
4433 sizeof(*params->ht_capabilities),
4434 params->ht_capabilities);
4435 }
4436
4437 os_memset(&upd, 0, sizeof(upd));
4438 upd.mask = sta_flags_nl80211(params->flags);
4439 upd.set = upd.mask;
4440 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4441
4442 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4443 if (ret)
4444 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
4445 "result: %d (%s)", ret, strerror(-ret));
4446 if (ret == -EEXIST)
4447 ret = 0;
4448 nla_put_failure:
4449 return ret;
4450 }
4451
4452
4453 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
4454 {
4455 struct i802_bss *bss = priv;
4456 struct wpa_driver_nl80211_data *drv = bss->drv;
4457 struct nl_msg *msg;
4458 int ret;
4459
4460 msg = nlmsg_alloc();
4461 if (!msg)
4462 return -ENOMEM;
4463
4464 nl80211_cmd(drv, msg, 0, NL80211_CMD_DEL_STATION);
4465
4466 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4467 if_nametoindex(bss->ifname));
4468 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4469
4470 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4471 if (ret == -ENOENT)
4472 return 0;
4473 return ret;
4474 nla_put_failure:
4475 return -ENOBUFS;
4476 }
4477
4478
4479 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
4480 int ifidx)
4481 {
4482 struct nl_msg *msg;
4483
4484 wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
4485
4486 #ifdef HOSTAPD
4487 /* stop listening for EAPOL on this interface */
4488 del_ifidx(drv, ifidx);
4489 #endif /* HOSTAPD */
4490
4491 msg = nlmsg_alloc();
4492 if (!msg)
4493 goto nla_put_failure;
4494
4495 nl80211_cmd(drv, msg, 0, NL80211_CMD_DEL_INTERFACE);
4496 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
4497
4498 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4499 return;
4500 nla_put_failure:
4501 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
4502 }
4503
4504
4505 static const char * nl80211_iftype_str(enum nl80211_iftype mode)
4506 {
4507 switch (mode) {
4508 case NL80211_IFTYPE_ADHOC:
4509 return "ADHOC";
4510 case NL80211_IFTYPE_STATION:
4511 return "STATION";
4512 case NL80211_IFTYPE_AP:
4513 return "AP";
4514 case NL80211_IFTYPE_MONITOR:
4515 return "MONITOR";
4516 case NL80211_IFTYPE_P2P_CLIENT:
4517 return "P2P_CLIENT";
4518 case NL80211_IFTYPE_P2P_GO:
4519 return "P2P_GO";
4520 default:
4521 return "unknown";
4522 }
4523 }
4524
4525
4526 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
4527 const char *ifname,
4528 enum nl80211_iftype iftype,
4529 const u8 *addr, int wds)
4530 {
4531 struct nl_msg *msg, *flags = NULL;
4532 int ifidx;
4533 int ret = -ENOBUFS;
4534
4535 wpa_printf(MSG_DEBUG, "nl80211: Create interface iftype %d (%s)",
4536 iftype, nl80211_iftype_str(iftype));
4537
4538 msg = nlmsg_alloc();
4539 if (!msg)
4540 return -1;
4541
4542 nl80211_cmd(drv, msg, 0, NL80211_CMD_NEW_INTERFACE);
4543 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4544 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
4545 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
4546
4547 if (iftype == NL80211_IFTYPE_MONITOR) {
4548 int err;
4549
4550 flags = nlmsg_alloc();
4551 if (!flags)
4552 goto nla_put_failure;
4553
4554 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
4555
4556 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
4557
4558 nlmsg_free(flags);
4559
4560 if (err)
4561 goto nla_put_failure;
4562 } else if (wds) {
4563 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
4564 }
4565
4566 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4567 if (ret) {
4568 nla_put_failure:
4569 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
4570 ifname, ret, strerror(-ret));
4571 return ret;
4572 }
4573
4574 ifidx = if_nametoindex(ifname);
4575 wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
4576 ifname, ifidx);
4577
4578 if (ifidx <= 0)
4579 return -1;
4580
4581 #ifdef HOSTAPD
4582 /* start listening for EAPOL on this interface */
4583 add_ifidx(drv, ifidx);
4584 #endif /* HOSTAPD */
4585
4586 if (addr && iftype != NL80211_IFTYPE_MONITOR &&
4587 linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
4588 nl80211_remove_iface(drv, ifidx);
4589 return -1;
4590 }
4591
4592 return ifidx;
4593 }
4594
4595
4596 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
4597 const char *ifname, enum nl80211_iftype iftype,
4598 const u8 *addr, int wds)
4599 {
4600 int ret;
4601
4602 ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
4603
4604 /* if error occurred and interface exists already */
4605 if (ret == -ENFILE && if_nametoindex(ifname)) {
4606 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
4607
4608 /* Try to remove the interface that was already there. */
4609 nl80211_remove_iface(drv, if_nametoindex(ifname));
4610
4611 /* Try to create the interface again */
4612 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
4613 wds);
4614 }
4615
4616 if (ret >= 0 && drv->disable_11b_rates)
4617 nl80211_disable_11b_rates(drv, ret, 1);
4618
4619 return ret;
4620 }
4621
4622
4623 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
4624 {
4625 struct ieee80211_hdr *hdr;
4626 u16 fc;
4627 union wpa_event_data event;
4628
4629 hdr = (struct ieee80211_hdr *) buf;
4630 fc = le_to_host16(hdr->frame_control);
4631
4632 os_memset(&event, 0, sizeof(event));
4633 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
4634 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
4635 event.tx_status.dst = hdr->addr1;
4636 event.tx_status.data = buf;
4637 event.tx_status.data_len = len;
4638 event.tx_status.ack = ok;
4639 wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
4640 }
4641
4642
4643 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
4644 u8 *buf, size_t len)
4645 {
4646 struct ieee80211_hdr *hdr = (void *)buf;
4647 u16 fc;
4648 union wpa_event_data event;
4649
4650 if (len < sizeof(*hdr))
4651 return;
4652
4653 fc = le_to_host16(hdr->frame_control);
4654
4655 os_memset(&event, 0, sizeof(event));
4656 event.rx_from_unknown.bssid = get_hdr_bssid(hdr, len);
4657 event.rx_from_unknown.addr = hdr->addr2;
4658 event.rx_from_unknown.wds = (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) ==
4659 (WLAN_FC_FROMDS | WLAN_FC_TODS);
4660 wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
4661 }
4662
4663
4664 static void handle_frame(struct wpa_driver_nl80211_data *drv,
4665 u8 *buf, size_t len, int datarate, int ssi_signal)
4666 {
4667 struct ieee80211_hdr *hdr;
4668 u16 fc;
4669 union wpa_event_data event;
4670
4671 hdr = (struct ieee80211_hdr *) buf;
4672 fc = le_to_host16(hdr->frame_control);
4673
4674 switch (WLAN_FC_GET_TYPE(fc)) {
4675 case WLAN_FC_TYPE_MGMT:
4676 os_memset(&event, 0, sizeof(event));
4677 event.rx_mgmt.frame = buf;
4678 event.rx_mgmt.frame_len = len;
4679 event.rx_mgmt.datarate = datarate;
4680 event.rx_mgmt.ssi_signal = ssi_signal;
4681 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
4682 break;
4683 case WLAN_FC_TYPE_CTRL:
4684 /* can only get here with PS-Poll frames */
4685 wpa_printf(MSG_DEBUG, "CTRL");
4686 from_unknown_sta(drv, buf, len);
4687 break;
4688 case WLAN_FC_TYPE_DATA:
4689 from_unknown_sta(drv, buf, len);
4690 break;
4691 }
4692 }
4693
4694
4695 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
4696 {
4697 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4698 int len;
4699 unsigned char buf[3000];
4700 struct ieee80211_radiotap_iterator iter;
4701 int ret;
4702 int datarate = 0, ssi_signal = 0;
4703 int injected = 0, failed = 0, rxflags = 0;
4704
4705 len = recv(sock, buf, sizeof(buf), 0);
4706 if (len < 0) {
4707 perror("recv");
4708 return;
4709 }
4710
4711 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
4712 printf("received invalid radiotap frame\n");
4713 return;
4714 }
4715
4716 while (1) {
4717 ret = ieee80211_radiotap_iterator_next(&iter);
4718 if (ret == -ENOENT)
4719 break;
4720 if (ret) {
4721 printf("received invalid radiotap frame (%d)\n", ret);
4722 return;
4723 }
4724 switch (iter.this_arg_index) {
4725 case IEEE80211_RADIOTAP_FLAGS:
4726 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
4727 len -= 4;
4728 break;
4729 case IEEE80211_RADIOTAP_RX_FLAGS:
4730 rxflags = 1;
4731 break;
4732 case IEEE80211_RADIOTAP_TX_FLAGS:
4733 injected = 1;
4734 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
4735 IEEE80211_RADIOTAP_F_TX_FAIL;
4736 break;
4737 case IEEE80211_RADIOTAP_DATA_RETRIES:
4738 break;
4739 case IEEE80211_RADIOTAP_CHANNEL:
4740 /* TODO: convert from freq/flags to channel number */
4741 break;
4742 case IEEE80211_RADIOTAP_RATE:
4743 datarate = *iter.this_arg * 5;
4744 break;
4745 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
4746 ssi_signal = *iter.this_arg;
4747 break;
4748 }
4749 }
4750
4751 if (rxflags && injected)
4752 return;
4753
4754 if (!injected)
4755 handle_frame(drv, buf + iter.max_length,
4756 len - iter.max_length, datarate, ssi_signal);
4757 else
4758 handle_tx_callback(drv->ctx, buf + iter.max_length,
4759 len - iter.max_length, !failed);
4760 }
4761
4762
4763 /*
4764 * we post-process the filter code later and rewrite
4765 * this to the offset to the last instruction
4766 */
4767 #define PASS 0xFF
4768 #define FAIL 0xFE
4769
4770 static struct sock_filter msock_filter_insns[] = {
4771 /*
4772 * do a little-endian load of the radiotap length field
4773 */
4774 /* load lower byte into A */
4775 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
4776 /* put it into X (== index register) */
4777 BPF_STMT(BPF_MISC| BPF_TAX, 0),
4778 /* load upper byte into A */
4779 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
4780 /* left-shift it by 8 */
4781 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
4782 /* or with X */
4783 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
4784 /* put result into X */
4785 BPF_STMT(BPF_MISC| BPF_TAX, 0),
4786
4787 /*
4788 * Allow management frames through, this also gives us those
4789 * management frames that we sent ourselves with status
4790 */
4791 /* load the lower byte of the IEEE 802.11 frame control field */
4792 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4793 /* mask off frame type and version */
4794 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
4795 /* accept frame if it's both 0, fall through otherwise */
4796 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
4797
4798 /*
4799 * TODO: add a bit to radiotap RX flags that indicates
4800 * that the sending station is not associated, then
4801 * add a filter here that filters on our DA and that flag
4802 * to allow us to deauth frames to that bad station.
4803 *
4804 * For now allow all To DS data frames through.
4805 */
4806 /* load the IEEE 802.11 frame control field */
4807 BPF_STMT(BPF_LD | BPF_H | BPF_IND, 0),
4808 /* mask off frame type, version and DS status */
4809 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0F03),
4810 /* accept frame if version 0, type 2 and To DS, fall through otherwise
4811 */
4812 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0801, PASS, 0),
4813
4814 #if 0
4815 /*
4816 * drop non-data frames
4817 */
4818 /* load the lower byte of the frame control field */
4819 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4820 /* mask off QoS bit */
4821 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
4822 /* drop non-data frames */
4823 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
4824 #endif
4825 /* load the upper byte of the frame control field */
4826 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
4827 /* mask off toDS/fromDS */
4828 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
4829 /* accept WDS frames */
4830 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, PASS, 0),
4831
4832 /*
4833 * add header length to index
4834 */
4835 /* load the lower byte of the frame control field */
4836 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4837 /* mask off QoS bit */
4838 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
4839 /* right shift it by 6 to give 0 or 2 */
4840 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
4841 /* add data frame header length */
4842 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
4843 /* add index, was start of 802.11 header */
4844 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
4845 /* move to index, now start of LL header */
4846 BPF_STMT(BPF_MISC | BPF_TAX, 0),
4847
4848 /*
4849 * Accept empty data frames, we use those for
4850 * polling activity.
4851 */
4852 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
4853 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
4854
4855 /*
4856 * Accept EAPOL frames
4857 */
4858 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
4859 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
4860 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
4861 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
4862
4863 /* keep these last two statements or change the code below */
4864 /* return 0 == "DROP" */
4865 BPF_STMT(BPF_RET | BPF_K, 0),
4866 /* return ~0 == "keep all" */
4867 BPF_STMT(BPF_RET | BPF_K, ~0),
4868 };
4869
4870 static struct sock_fprog msock_filter = {
4871 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
4872 .filter = msock_filter_insns,
4873 };
4874
4875
4876 static int add_monitor_filter(int s)
4877 {
4878 int idx;
4879
4880 /* rewrite all PASS/FAIL jump offsets */
4881 for (idx = 0; idx < msock_filter.len; idx++) {
4882 struct sock_filter *insn = &msock_filter_insns[idx];
4883
4884 if (BPF_CLASS(insn->code) == BPF_JMP) {
4885 if (insn->code == (BPF_JMP|BPF_JA)) {
4886 if (insn->k == PASS)
4887 insn->k = msock_filter.len - idx - 2;
4888 else if (insn->k == FAIL)
4889 insn->k = msock_filter.len - idx - 3;
4890 }
4891
4892 if (insn->jt == PASS)
4893 insn->jt = msock_filter.len - idx - 2;
4894 else if (insn->jt == FAIL)
4895 insn->jt = msock_filter.len - idx - 3;
4896
4897 if (insn->jf == PASS)
4898 insn->jf = msock_filter.len - idx - 2;
4899 else if (insn->jf == FAIL)
4900 insn->jf = msock_filter.len - idx - 3;
4901 }
4902 }
4903
4904 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
4905 &msock_filter, sizeof(msock_filter))) {
4906 perror("SO_ATTACH_FILTER");
4907 return -1;
4908 }
4909
4910 return 0;
4911 }
4912
4913
4914 static void nl80211_remove_monitor_interface(
4915 struct wpa_driver_nl80211_data *drv)
4916 {
4917 if (drv->monitor_ifidx >= 0) {
4918 nl80211_remove_iface(drv, drv->monitor_ifidx);
4919 drv->monitor_ifidx = -1;
4920 }
4921 if (drv->monitor_sock >= 0) {
4922 eloop_unregister_read_sock(drv->monitor_sock);
4923 close(drv->monitor_sock);
4924 drv->monitor_sock = -1;
4925 }
4926 }
4927
4928
4929 static int
4930 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
4931 {
4932 char buf[IFNAMSIZ];
4933 struct sockaddr_ll ll;
4934 int optval;
4935 socklen_t optlen;
4936
4937 if (os_strncmp(drv->first_bss.ifname, "p2p-", 4) == 0) {
4938 /*
4939 * P2P interface name is of the format p2p-%s-%d. For monitor
4940 * interface name corresponding to P2P GO, replace "p2p-" with
4941 * "mon-" to retain the same interface name length and to
4942 * indicate that it is a monitor interface.
4943 */
4944 snprintf(buf, IFNAMSIZ, "mon-%s", drv->first_bss.ifname + 4);
4945 } else {
4946 /* Non-P2P interface with AP functionality. */
4947 snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
4948 }
4949
4950 buf[IFNAMSIZ - 1] = '\0';
4951
4952 drv->monitor_ifidx =
4953 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
4954 0);
4955
4956 if (drv->monitor_ifidx == -EOPNOTSUPP) {
4957 wpa_printf(MSG_DEBUG, "nl80211: Driver does not support "
4958 "monitor interface type - try to run without it");
4959 drv->no_monitor_iface_capab = 1;
4960 }
4961
4962 if (drv->monitor_ifidx < 0)
4963 return -1;
4964
4965 if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
4966 goto error;
4967
4968 memset(&ll, 0, sizeof(ll));
4969 ll.sll_family = AF_PACKET;
4970 ll.sll_ifindex = drv->monitor_ifidx;
4971 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
4972 if (drv->monitor_sock < 0) {
4973 perror("socket[PF_PACKET,SOCK_RAW]");
4974 goto error;
4975 }
4976
4977 if (add_monitor_filter(drv->monitor_sock)) {
4978 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
4979 "interface; do filtering in user space");
4980 /* This works, but will cost in performance. */
4981 }
4982
4983 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
4984 perror("monitor socket bind");
4985 goto error;
4986 }
4987
4988 optlen = sizeof(optval);
4989 optval = 20;
4990 if (setsockopt
4991 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
4992 perror("Failed to set socket priority");
4993 goto error;
4994 }
4995
4996 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
4997 drv, NULL)) {
4998 printf("Could not register monitor read socket\n");
4999 goto error;
5000 }
5001
5002 return 0;
5003 error:
5004 nl80211_remove_monitor_interface(drv);
5005 return -1;
5006 }
5007
5008
5009 #ifdef CONFIG_AP
5010 static int nl80211_send_eapol_data(struct i802_bss *bss,
5011 const u8 *addr, const u8 *data,
5012 size_t data_len, const u8 *own_addr)
5013 {
5014 if (bss->drv->l2 == NULL) {
5015 wpa_printf(MSG_DEBUG, "nl80211: No l2_packet to send EAPOL");
5016 return -1;
5017 }
5018
5019 if (l2_packet_send(bss->drv->l2, addr, ETH_P_EAPOL, data, data_len) <
5020 0)
5021 return -1;
5022 return 0;
5023 }
5024 #endif /* CONFIG_AP */
5025
5026
5027 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
5028
5029 static int wpa_driver_nl80211_hapd_send_eapol(
5030 void *priv, const u8 *addr, const u8 *data,
5031 size_t data_len, int encrypt, const u8 *own_addr, u32 flags)
5032 {
5033 struct i802_bss *bss = priv;
5034 struct wpa_driver_nl80211_data *drv = bss->drv;
5035 struct ieee80211_hdr *hdr;
5036 size_t len;
5037 u8 *pos;
5038 int res;
5039 int qos = flags & WPA_STA_WMM;
5040
5041 #ifdef CONFIG_AP
5042 if (drv->no_monitor_iface_capab)
5043 return nl80211_send_eapol_data(bss, addr, data, data_len,
5044 own_addr);
5045 #endif /* CONFIG_AP */
5046
5047 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
5048 data_len;
5049 hdr = os_zalloc(len);
5050 if (hdr == NULL) {
5051 printf("malloc() failed for i802_send_data(len=%lu)\n",
5052 (unsigned long) len);
5053 return -1;
5054 }
5055
5056 hdr->frame_control =
5057 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
5058 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
5059 if (encrypt)
5060 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
5061 if (qos) {
5062 hdr->frame_control |=
5063 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
5064 }
5065
5066 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
5067 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
5068 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
5069 pos = (u8 *) (hdr + 1);
5070
5071 if (qos) {
5072 /* add an empty QoS header if needed */
5073 pos[0] = 0;
5074 pos[1] = 0;
5075 pos += 2;
5076 }
5077
5078 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
5079 pos += sizeof(rfc1042_header);
5080 WPA_PUT_BE16(pos, ETH_P_PAE);
5081 pos += 2;
5082 memcpy(pos, data, data_len);
5083
5084 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
5085 if (res < 0) {
5086 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
5087 "failed: %d (%s)",
5088 (unsigned long) len, errno, strerror(errno));
5089 }
5090 os_free(hdr);
5091
5092 return res;
5093 }
5094
5095
5096 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
5097 int total_flags,
5098 int flags_or, int flags_and)
5099 {
5100 struct i802_bss *bss = priv;
5101 struct wpa_driver_nl80211_data *drv = bss->drv;
5102 struct nl_msg *msg, *flags = NULL;
5103 struct nl80211_sta_flag_update upd;
5104
5105 msg = nlmsg_alloc();
5106 if (!msg)
5107 return -ENOMEM;
5108
5109 flags = nlmsg_alloc();
5110 if (!flags) {
5111 nlmsg_free(msg);
5112 return -ENOMEM;
5113 }
5114
5115 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_STATION);
5116
5117 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5118 if_nametoindex(bss->ifname));
5119 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5120
5121 /*
5122 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
5123 * can be removed eventually.
5124 */
5125 if (total_flags & WPA_STA_AUTHORIZED)
5126 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
5127
5128 if (total_flags & WPA_STA_WMM)
5129 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
5130
5131 if (total_flags & WPA_STA_SHORT_PREAMBLE)
5132 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
5133
5134 if (total_flags & WPA_STA_MFP)
5135 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
5136
5137 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
5138 goto nla_put_failure;
5139
5140 os_memset(&upd, 0, sizeof(upd));
5141 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
5142 upd.set = sta_flags_nl80211(flags_or);
5143 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
5144
5145 nlmsg_free(flags);
5146
5147 return send_and_recv_msgs(drv, msg, NULL, NULL);
5148 nla_put_failure:
5149 nlmsg_free(flags);
5150 return -ENOBUFS;
5151 }
5152
5153
5154 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
5155 struct wpa_driver_associate_params *params)
5156 {
5157 enum nl80211_iftype nlmode;
5158
5159 if (params->p2p) {
5160 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
5161 "group (GO)");
5162 nlmode = NL80211_IFTYPE_P2P_GO;
5163 } else
5164 nlmode = NL80211_IFTYPE_AP;
5165
5166 if (wpa_driver_nl80211_set_mode(&drv->first_bss, nlmode) ||
5167 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
5168 nl80211_remove_monitor_interface(drv);
5169 return -1;
5170 }
5171
5172 if (drv->no_monitor_iface_capab) {
5173 if (wpa_driver_nl80211_probe_req_report(&drv->first_bss, 1) < 0)
5174 {
5175 wpa_printf(MSG_DEBUG, "nl80211: Failed to enable "
5176 "Probe Request frame reporting in AP mode");
5177 /* Try to survive without this */
5178 }
5179 }
5180
5181 drv->ap_oper_freq = params->freq;
5182
5183 return 0;
5184 }
5185
5186
5187 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
5188 {
5189 struct nl_msg *msg;
5190 int ret = -1;
5191
5192 msg = nlmsg_alloc();
5193 if (!msg)
5194 return -1;
5195
5196 nl80211_cmd(drv, msg, 0, NL80211_CMD_LEAVE_IBSS);
5197 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5198 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5199 msg = NULL;
5200 if (ret) {
5201 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
5202 "(%s)", ret, strerror(-ret));
5203 goto nla_put_failure;
5204 }
5205
5206 ret = 0;
5207 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
5208
5209 nla_put_failure:
5210 nlmsg_free(msg);
5211 return ret;
5212 }
5213
5214
5215 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
5216 struct wpa_driver_associate_params *params)
5217 {
5218 struct nl_msg *msg;
5219 int ret = -1;
5220 int count = 0;
5221
5222 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
5223
5224 if (wpa_driver_nl80211_set_mode(&drv->first_bss,
5225 NL80211_IFTYPE_ADHOC)) {
5226 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
5227 "IBSS mode");
5228 return -1;
5229 }
5230
5231 retry:
5232 msg = nlmsg_alloc();
5233 if (!msg)
5234 return -1;
5235
5236 nl80211_cmd(drv, msg, 0, NL80211_CMD_JOIN_IBSS);
5237 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5238
5239 if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
5240 goto nla_put_failure;
5241
5242 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
5243 params->ssid, params->ssid_len);
5244 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
5245 params->ssid);
5246 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
5247 drv->ssid_len = params->ssid_len;
5248
5249 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
5250 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
5251
5252 ret = nl80211_set_conn_keys(params, msg);
5253 if (ret)
5254 goto nla_put_failure;
5255
5256 if (params->wpa_ie) {
5257 wpa_hexdump(MSG_DEBUG,
5258 " * Extra IEs for Beacon/Probe Response frames",
5259 params->wpa_ie, params->wpa_ie_len);
5260 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
5261 params->wpa_ie);
5262 }
5263
5264 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5265 msg = NULL;
5266 if (ret) {
5267 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
5268 ret, strerror(-ret));
5269 count++;
5270 if (ret == -EALREADY && count == 1) {
5271 wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
5272 "forced leave");
5273 nl80211_leave_ibss(drv);
5274 nlmsg_free(msg);
5275 goto retry;
5276 }
5277
5278 goto nla_put_failure;
5279 }
5280 ret = 0;
5281 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
5282
5283 nla_put_failure:
5284 nlmsg_free(msg);
5285 return ret;
5286 }
5287
5288
5289 static unsigned int nl80211_get_assoc_bssid(struct wpa_driver_nl80211_data *drv,
5290 u8 *bssid)
5291 {
5292 struct nl_msg *msg;
5293 int ret;
5294 struct nl80211_bss_info_arg arg;
5295
5296 os_memset(&arg, 0, sizeof(arg));
5297 msg = nlmsg_alloc();
5298 if (!msg)
5299 goto nla_put_failure;
5300
5301 nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SCAN);
5302 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5303
5304 arg.drv = drv;
5305 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
5306 msg = NULL;
5307 if (ret == 0) {
5308 if (is_zero_ether_addr(arg.assoc_bssid))
5309 return -ENOTCONN;
5310 os_memcpy(bssid, arg.assoc_bssid, ETH_ALEN);
5311 return 0;
5312 }
5313 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
5314 "(%s)", ret, strerror(-ret));
5315 nla_put_failure:
5316 nlmsg_free(msg);
5317 return drv->assoc_freq;
5318 }
5319
5320
5321 static int nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
5322 const u8 *bssid)
5323 {
5324 u8 addr[ETH_ALEN];
5325
5326 if (bssid == NULL) {
5327 int res = nl80211_get_assoc_bssid(drv, addr);
5328 if (res)
5329 return res;
5330 bssid = addr;
5331 }
5332
5333 return wpa_driver_nl80211_disconnect(drv, bssid,
5334 WLAN_REASON_PREV_AUTH_NOT_VALID);
5335 }
5336
5337
5338 static int wpa_driver_nl80211_connect(
5339 struct wpa_driver_nl80211_data *drv,
5340 struct wpa_driver_associate_params *params)
5341 {
5342 struct nl_msg *msg;
5343 enum nl80211_auth_type type;
5344 int ret = 0;
5345 int algs;
5346
5347 msg = nlmsg_alloc();
5348 if (!msg)
5349 return -1;
5350
5351 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
5352 nl80211_cmd(drv, msg, 0, NL80211_CMD_CONNECT);
5353
5354 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5355 if (params->bssid) {
5356 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
5357 MAC2STR(params->bssid));
5358 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
5359 }
5360 if (params->freq) {
5361 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
5362 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
5363 }
5364 if (params->ssid) {
5365 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
5366 params->ssid, params->ssid_len);
5367 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
5368 params->ssid);
5369 if (params->ssid_len > sizeof(drv->ssid))
5370 goto nla_put_failure;
5371 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
5372 drv->ssid_len = params->ssid_len;
5373 }
5374 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
5375 if (params->wpa_ie)
5376 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
5377 params->wpa_ie);
5378
5379 algs = 0;
5380 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
5381 algs++;
5382 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
5383 algs++;
5384 if (params->auth_alg & WPA_AUTH_ALG_LEAP)
5385 algs++;
5386 if (algs > 1) {
5387 wpa_printf(MSG_DEBUG, " * Leave out Auth Type for automatic "
5388 "selection");
5389 goto skip_auth_type;
5390 }
5391
5392 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
5393 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
5394 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
5395 type = NL80211_AUTHTYPE_SHARED_KEY;
5396 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
5397 type = NL80211_AUTHTYPE_NETWORK_EAP;
5398 else if (params->auth_alg & WPA_AUTH_ALG_FT)
5399 type = NL80211_AUTHTYPE_FT;
5400 else
5401 goto nla_put_failure;
5402
5403 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
5404 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
5405
5406 skip_auth_type:
5407 if (params->wpa_proto) {
5408 enum nl80211_wpa_versions ver = 0;
5409
5410 if (params->wpa_proto & WPA_PROTO_WPA)
5411 ver |= NL80211_WPA_VERSION_1;
5412 if (params->wpa_proto & WPA_PROTO_RSN)
5413 ver |= NL80211_WPA_VERSION_2;
5414
5415 wpa_printf(MSG_DEBUG, " * WPA Versions 0x%x", ver);
5416 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
5417 }
5418
5419 if (params->pairwise_suite != CIPHER_NONE) {
5420 int cipher;
5421
5422 switch (params->pairwise_suite) {
5423 case CIPHER_WEP40:
5424 cipher = WLAN_CIPHER_SUITE_WEP40;
5425 break;
5426 case CIPHER_WEP104:
5427 cipher = WLAN_CIPHER_SUITE_WEP104;
5428 break;
5429 case CIPHER_CCMP:
5430 cipher = WLAN_CIPHER_SUITE_CCMP;
5431 break;
5432 case CIPHER_TKIP:
5433 default:
5434 cipher = WLAN_CIPHER_SUITE_TKIP;
5435 break;
5436 }
5437 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
5438 }
5439
5440 if (params->group_suite != CIPHER_NONE) {
5441 int cipher;
5442
5443 switch (params->group_suite) {
5444 case CIPHER_WEP40:
5445 cipher = WLAN_CIPHER_SUITE_WEP40;
5446 break;
5447 case CIPHER_WEP104:
5448 cipher = WLAN_CIPHER_SUITE_WEP104;
5449 break;
5450 case CIPHER_CCMP:
5451 cipher = WLAN_CIPHER_SUITE_CCMP;
5452 break;
5453 case CIPHER_TKIP:
5454 default:
5455 cipher = WLAN_CIPHER_SUITE_TKIP;
5456 break;
5457 }
5458 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
5459 }
5460
5461 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
5462 params->key_mgmt_suite == KEY_MGMT_PSK) {
5463 int mgmt = WLAN_AKM_SUITE_PSK;
5464
5465 switch (params->key_mgmt_suite) {
5466 case KEY_MGMT_802_1X:
5467 mgmt = WLAN_AKM_SUITE_8021X;
5468 break;
5469 case KEY_MGMT_PSK:
5470 default:
5471 mgmt = WLAN_AKM_SUITE_PSK;
5472 break;
5473 }
5474 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
5475 }
5476
5477 ret = nl80211_set_conn_keys(params, msg);
5478 if (ret)
5479 goto nla_put_failure;
5480
5481 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5482 msg = NULL;
5483 if (ret) {
5484 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
5485 "(%s)", ret, strerror(-ret));
5486 /*
5487 * cfg80211 does not currently accept new connection if we are
5488 * already connected. As a workaround, force disconnection and
5489 * try again once the driver indicates it completed
5490 * disconnection.
5491 */
5492 if (ret == -EALREADY)
5493 nl80211_disconnect(drv, params->bssid);
5494 goto nla_put_failure;
5495 }
5496 ret = 0;
5497 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
5498
5499 nla_put_failure:
5500 nlmsg_free(msg);
5501 return ret;
5502
5503 }
5504
5505
5506 static int wpa_driver_nl80211_associate(
5507 void *priv, struct wpa_driver_associate_params *params)
5508 {
5509 struct i802_bss *bss = priv;
5510 struct wpa_driver_nl80211_data *drv = bss->drv;
5511 int ret = -1;
5512 struct nl_msg *msg;
5513
5514 if (params->mode == IEEE80211_MODE_AP)
5515 return wpa_driver_nl80211_ap(drv, params);
5516
5517 if (params->mode == IEEE80211_MODE_IBSS)
5518 return wpa_driver_nl80211_ibss(drv, params);
5519
5520 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
5521 enum nl80211_iftype nlmode = params->p2p ?
5522 NL80211_IFTYPE_P2P_CLIENT : NL80211_IFTYPE_STATION;
5523
5524 if (wpa_driver_nl80211_set_mode(priv, nlmode) < 0)
5525 return -1;
5526 return wpa_driver_nl80211_connect(drv, params);
5527 }
5528
5529 drv->associated = 0;
5530
5531 msg = nlmsg_alloc();
5532 if (!msg)
5533 return -1;
5534
5535 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
5536 drv->ifindex);
5537 nl80211_cmd(drv, msg, 0, NL80211_CMD_ASSOCIATE);
5538
5539 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5540 if (params->bssid) {
5541 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
5542 MAC2STR(params->bssid));
5543 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
5544 }
5545 if (params->freq) {
5546 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
5547 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
5548 drv->assoc_freq = params->freq;
5549 } else
5550 drv->assoc_freq = 0;
5551 if (params->ssid) {
5552 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
5553 params->ssid, params->ssid_len);
5554 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
5555 params->ssid);
5556 if (params->ssid_len > sizeof(drv->ssid))
5557 goto nla_put_failure;
5558 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
5559 drv->ssid_len = params->ssid_len;
5560 }
5561 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
5562 if (params->wpa_ie)
5563 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
5564 params->wpa_ie);
5565
5566 if (params->pairwise_suite != CIPHER_NONE) {
5567 int cipher;
5568
5569 switch (params->pairwise_suite) {
5570 case CIPHER_WEP40:
5571 cipher = WLAN_CIPHER_SUITE_WEP40;
5572 break;
5573 case CIPHER_WEP104:
5574 cipher = WLAN_CIPHER_SUITE_WEP104;
5575 break;
5576 case CIPHER_CCMP:
5577 cipher = WLAN_CIPHER_SUITE_CCMP;
5578 break;
5579 case CIPHER_TKIP:
5580 default:
5581 cipher = WLAN_CIPHER_SUITE_TKIP;
5582 break;
5583 }
5584 wpa_printf(MSG_DEBUG, " * pairwise=0x%x", cipher);
5585 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
5586 }
5587
5588 if (params->group_suite != CIPHER_NONE) {
5589 int cipher;
5590
5591 switch (params->group_suite) {
5592 case CIPHER_WEP40:
5593 cipher = WLAN_CIPHER_SUITE_WEP40;
5594 break;
5595 case CIPHER_WEP104:
5596 cipher = WLAN_CIPHER_SUITE_WEP104;
5597 break;
5598 case CIPHER_CCMP:
5599 cipher = WLAN_CIPHER_SUITE_CCMP;
5600 break;
5601 case CIPHER_TKIP:
5602 default:
5603 cipher = WLAN_CIPHER_SUITE_TKIP;
5604 break;
5605 }
5606 wpa_printf(MSG_DEBUG, " * group=0x%x", cipher);
5607 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
5608 }
5609
5610 #ifdef CONFIG_IEEE80211W
5611 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
5612 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
5613 #endif /* CONFIG_IEEE80211W */
5614
5615 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
5616
5617 if (params->prev_bssid) {
5618 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
5619 MAC2STR(params->prev_bssid));
5620 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
5621 params->prev_bssid);
5622 }
5623
5624 if (params->p2p)
5625 wpa_printf(MSG_DEBUG, " * P2P group");
5626
5627 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5628 msg = NULL;
5629 if (ret) {
5630 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
5631 "(%s)", ret, strerror(-ret));
5632 nl80211_dump_scan(drv);
5633 goto nla_put_failure;
5634 }
5635 ret = 0;
5636 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
5637 "successfully");
5638
5639 nla_put_failure:
5640 nlmsg_free(msg);
5641 return ret;
5642 }
5643
5644
5645 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
5646 int ifindex, enum nl80211_iftype mode)
5647 {
5648 struct nl_msg *msg;
5649 int ret = -ENOBUFS;
5650
5651 wpa_printf(MSG_DEBUG, "nl80211: Set mode ifindex %d iftype %d (%s)",
5652 ifindex, mode, nl80211_iftype_str(mode));
5653
5654 msg = nlmsg_alloc();
5655 if (!msg)
5656 return -ENOMEM;
5657
5658 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_INTERFACE);
5659 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5660 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
5661
5662 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5663 if (!ret)
5664 return 0;
5665 nla_put_failure:
5666 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
5667 " %d (%s)", ifindex, mode, ret, strerror(-ret));
5668 return ret;
5669 }
5670
5671
5672 static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
5673 enum nl80211_iftype nlmode)
5674 {
5675 struct wpa_driver_nl80211_data *drv = bss->drv;
5676 int ret = -1;
5677 int i;
5678 int was_ap = is_ap_interface(drv->nlmode);
5679
5680 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
5681 drv->nlmode = nlmode;
5682 ret = 0;
5683 goto done;
5684 }
5685
5686 if (nlmode == drv->nlmode) {
5687 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
5688 "requested mode - ignore error");
5689 ret = 0;
5690 goto done; /* Already in the requested mode */
5691 }
5692
5693 /* mac80211 doesn't allow mode changes while the device is up, so
5694 * take the device down, try to set the mode again, and bring the
5695 * device back up.
5696 */
5697 wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
5698 "interface down");
5699 for (i = 0; i < 10; i++) {
5700 int res;
5701 res = linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
5702 if (res == -EACCES || res == -ENODEV)
5703 break;
5704 if (res == 0) {
5705 /* Try to set the mode again while the interface is
5706 * down */
5707 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
5708 if (ret == -EACCES)
5709 break;
5710 res = linux_set_iface_flags(drv->ioctl_sock,
5711 bss->ifname, 1);
5712 if (res && !ret)
5713 ret = -1;
5714 else if (ret != -EBUSY)
5715 break;
5716 } else
5717 wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
5718 "interface down");
5719 os_sleep(0, 100000);
5720 }
5721
5722 if (!ret) {
5723 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
5724 "interface is down");
5725 drv->nlmode = nlmode;
5726 drv->ignore_if_down_event = 1;
5727 }
5728
5729 done:
5730 if (!ret && is_ap_interface(nlmode)) {
5731 /* Setup additional AP mode functionality if needed */
5732 if (!drv->no_monitor_iface_capab && drv->monitor_ifidx < 0 &&
5733 nl80211_create_monitor_interface(drv) &&
5734 !drv->no_monitor_iface_capab)
5735 return -1;
5736 } else if (!ret && !is_ap_interface(nlmode)) {
5737 /* Remove additional AP mode functionality */
5738 if (was_ap && drv->no_monitor_iface_capab)
5739 wpa_driver_nl80211_probe_req_report(bss, 0);
5740 nl80211_remove_monitor_interface(drv);
5741 bss->beacon_set = 0;
5742 }
5743
5744 if (ret)
5745 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
5746 "from %d failed", nlmode, drv->nlmode);
5747
5748 return ret;
5749 }
5750
5751
5752 static int wpa_driver_nl80211_get_capa(void *priv,
5753 struct wpa_driver_capa *capa)
5754 {
5755 struct i802_bss *bss = priv;
5756 struct wpa_driver_nl80211_data *drv = bss->drv;
5757 if (!drv->has_capability)
5758 return -1;
5759 os_memcpy(capa, &drv->capa, sizeof(*capa));
5760 return 0;
5761 }
5762
5763
5764 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
5765 {
5766 struct i802_bss *bss = priv;
5767 struct wpa_driver_nl80211_data *drv = bss->drv;
5768
5769 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
5770 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
5771 drv->operstate = state;
5772 return netlink_send_oper_ifla(drv->global->netlink, drv->ifindex, -1,
5773 state ? IF_OPER_UP : IF_OPER_DORMANT);
5774 }
5775
5776
5777 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
5778 {
5779 struct i802_bss *bss = priv;
5780 struct wpa_driver_nl80211_data *drv = bss->drv;
5781 struct nl_msg *msg;
5782 struct nl80211_sta_flag_update upd;
5783
5784 msg = nlmsg_alloc();
5785 if (!msg)
5786 return -ENOMEM;
5787
5788 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_STATION);
5789
5790 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5791 if_nametoindex(bss->ifname));
5792 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
5793
5794 os_memset(&upd, 0, sizeof(upd));
5795 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
5796 if (authorized)
5797 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
5798 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
5799
5800 return send_and_recv_msgs(drv, msg, NULL, NULL);
5801 nla_put_failure:
5802 return -ENOBUFS;
5803 }
5804
5805
5806 /* Set kernel driver on given frequency (MHz) */
5807 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
5808 {
5809 struct i802_bss *bss = priv;
5810 struct wpa_driver_nl80211_data *drv = bss->drv;
5811 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
5812 freq->sec_channel_offset);
5813 }
5814
5815
5816 #if defined(HOSTAPD) || defined(CONFIG_AP)
5817
5818 static inline int min_int(int a, int b)
5819 {
5820 if (a < b)
5821 return a;
5822 return b;
5823 }
5824
5825
5826 static int get_key_handler(struct nl_msg *msg, void *arg)
5827 {
5828 struct nlattr *tb[NL80211_ATTR_MAX + 1];
5829 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5830
5831 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5832 genlmsg_attrlen(gnlh, 0), NULL);
5833
5834 /*
5835 * TODO: validate the key index and mac address!
5836 * Otherwise, there's a race condition as soon as
5837 * the kernel starts sending key notifications.
5838 */
5839
5840 if (tb[NL80211_ATTR_KEY_SEQ])
5841 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
5842 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
5843 return NL_SKIP;
5844 }
5845
5846
5847 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
5848 int idx, u8 *seq)
5849 {
5850 struct i802_bss *bss = priv;
5851 struct wpa_driver_nl80211_data *drv = bss->drv;
5852 struct nl_msg *msg;
5853
5854 msg = nlmsg_alloc();
5855 if (!msg)
5856 return -ENOMEM;
5857
5858 nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_KEY);
5859
5860 if (addr)
5861 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5862 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
5863 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
5864
5865 memset(seq, 0, 6);
5866
5867 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
5868 nla_put_failure:
5869 return -ENOBUFS;
5870 }
5871
5872
5873 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
5874 int mode)
5875 {
5876 struct i802_bss *bss = priv;
5877 struct wpa_driver_nl80211_data *drv = bss->drv;
5878 struct nl_msg *msg;
5879 u8 rates[NL80211_MAX_SUPP_RATES];
5880 u8 rates_len = 0;
5881 int i;
5882
5883 msg = nlmsg_alloc();
5884 if (!msg)
5885 return -ENOMEM;
5886
5887 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_BSS);
5888
5889 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
5890 rates[rates_len++] = basic_rates[i] / 5;
5891
5892 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
5893
5894 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
5895
5896 return send_and_recv_msgs(drv, msg, NULL, NULL);
5897 nla_put_failure:
5898 return -ENOBUFS;
5899 }
5900
5901
5902 static int i802_set_rts(void *priv, int rts)
5903 {
5904 struct i802_bss *bss = priv;
5905 struct wpa_driver_nl80211_data *drv = bss->drv;
5906 struct nl_msg *msg;
5907 int ret = -ENOBUFS;
5908 u32 val;
5909
5910 msg = nlmsg_alloc();
5911 if (!msg)
5912 return -ENOMEM;
5913
5914 if (rts >= 2347)
5915 val = (u32) -1;
5916 else
5917 val = rts;
5918
5919 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_WIPHY);
5920 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5921 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
5922
5923 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5924 if (!ret)
5925 return 0;
5926 nla_put_failure:
5927 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
5928 "%d (%s)", rts, ret, strerror(-ret));
5929 return ret;
5930 }
5931
5932
5933 static int i802_set_frag(void *priv, int frag)
5934 {
5935 struct i802_bss *bss = priv;
5936 struct wpa_driver_nl80211_data *drv = bss->drv;
5937 struct nl_msg *msg;
5938 int ret = -ENOBUFS;
5939 u32 val;
5940
5941 msg = nlmsg_alloc();
5942 if (!msg)
5943 return -ENOMEM;
5944
5945 if (frag >= 2346)
5946 val = (u32) -1;
5947 else
5948 val = frag;
5949
5950 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_WIPHY);
5951 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5952 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
5953
5954 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5955 if (!ret)
5956 return 0;
5957 nla_put_failure:
5958 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
5959 "%d: %d (%s)", frag, ret, strerror(-ret));
5960 return ret;
5961 }
5962
5963
5964 static int i802_flush(void *priv)
5965 {
5966 struct i802_bss *bss = priv;
5967 struct wpa_driver_nl80211_data *drv = bss->drv;
5968 struct nl_msg *msg;
5969
5970 msg = nlmsg_alloc();
5971 if (!msg)
5972 return -1;
5973
5974 nl80211_cmd(drv, msg, 0, NL80211_CMD_DEL_STATION);
5975
5976 /*
5977 * XXX: FIX! this needs to flush all VLANs too
5978 */
5979 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5980 if_nametoindex(bss->ifname));
5981
5982 return send_and_recv_msgs(drv, msg, NULL, NULL);
5983 nla_put_failure:
5984 return -ENOBUFS;
5985 }
5986
5987
5988 static int get_sta_handler(struct nl_msg *msg, void *arg)
5989 {
5990 struct nlattr *tb[NL80211_ATTR_MAX + 1];
5991 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5992 struct hostap_sta_driver_data *data = arg;
5993 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
5994 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
5995 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
5996 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
5997 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
5998 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
5999 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
6000 };
6001
6002 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
6003 genlmsg_attrlen(gnlh, 0), NULL);
6004
6005 /*
6006 * TODO: validate the interface and mac address!
6007 * Otherwise, there's a race condition as soon as
6008 * the kernel starts sending station notifications.
6009 */
6010
6011 if (!tb[NL80211_ATTR_STA_INFO]) {
6012 wpa_printf(MSG_DEBUG, "sta stats missing!");
6013 return NL_SKIP;
6014 }
6015 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
6016 tb[NL80211_ATTR_STA_INFO],
6017 stats_policy)) {
6018 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
6019 return NL_SKIP;
6020 }
6021
6022 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
6023 data->inactive_msec =
6024 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
6025 if (stats[NL80211_STA_INFO_RX_BYTES])
6026 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
6027 if (stats[NL80211_STA_INFO_TX_BYTES])
6028 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
6029 if (stats[NL80211_STA_INFO_RX_PACKETS])
6030 data->rx_packets =
6031 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
6032 if (stats[NL80211_STA_INFO_TX_PACKETS])
6033 data->tx_packets =
6034 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
6035
6036 return NL_SKIP;
6037 }
6038
6039 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
6040 const u8 *addr)
6041 {
6042 struct i802_bss *bss = priv;
6043 struct wpa_driver_nl80211_data *drv = bss->drv;
6044 struct nl_msg *msg;
6045
6046 os_memset(data, 0, sizeof(*data));
6047 msg = nlmsg_alloc();
6048 if (!msg)
6049 return -ENOMEM;
6050
6051 nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_STATION);
6052
6053 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6054 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
6055
6056 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
6057 nla_put_failure:
6058 return -ENOBUFS;
6059 }
6060
6061
6062 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
6063 int cw_min, int cw_max, int burst_time)
6064 {
6065 struct i802_bss *bss = priv;
6066 struct wpa_driver_nl80211_data *drv = bss->drv;
6067 struct nl_msg *msg;
6068 struct nlattr *txq, *params;
6069
6070 msg = nlmsg_alloc();
6071 if (!msg)
6072 return -1;
6073
6074 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_WIPHY);
6075
6076 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
6077
6078 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
6079 if (!txq)
6080 goto nla_put_failure;
6081
6082 /* We are only sending parameters for a single TXQ at a time */
6083 params = nla_nest_start(msg, 1);
6084 if (!params)
6085 goto nla_put_failure;
6086
6087 switch (queue) {
6088 case 0:
6089 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VO);
6090 break;
6091 case 1:
6092 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VI);
6093 break;
6094 case 2:
6095 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BE);
6096 break;
6097 case 3:
6098 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BK);
6099 break;
6100 }
6101 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
6102 * 32 usec, so need to convert the value here. */
6103 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
6104 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
6105 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
6106 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
6107
6108 nla_nest_end(msg, params);
6109
6110 nla_nest_end(msg, txq);
6111
6112 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
6113 return 0;
6114 nla_put_failure:
6115 return -1;
6116 }
6117
6118
6119 static int i802_set_sta_vlan(void *priv, const u8 *addr,
6120 const char *ifname, int vlan_id)
6121 {
6122 struct i802_bss *bss = priv;
6123 struct wpa_driver_nl80211_data *drv = bss->drv;
6124 struct nl_msg *msg;
6125 int ret = -ENOBUFS;
6126
6127 msg = nlmsg_alloc();
6128 if (!msg)
6129 return -ENOMEM;
6130
6131 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_STATION);
6132
6133 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
6134 if_nametoindex(bss->ifname));
6135 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6136 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
6137 if_nametoindex(ifname));
6138
6139 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6140 if (ret < 0) {
6141 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
6142 MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
6143 MAC2STR(addr), ifname, vlan_id, ret,
6144 strerror(-ret));
6145 }
6146 nla_put_failure:
6147 return ret;
6148 }
6149
6150
6151 static int i802_get_inact_sec(void *priv, const u8 *addr)
6152 {
6153 struct hostap_sta_driver_data data;
6154 int ret;
6155
6156 data.inactive_msec = (unsigned long) -1;
6157 ret = i802_read_sta_data(priv, &data, addr);
6158 if (ret || data.inactive_msec == (unsigned long) -1)
6159 return -1;
6160 return data.inactive_msec / 1000;
6161 }
6162
6163
6164 static int i802_sta_clear_stats(void *priv, const u8 *addr)
6165 {
6166 #if 0
6167 /* TODO */
6168 #endif
6169 return 0;
6170 }
6171
6172
6173 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
6174 int reason)
6175 {
6176 struct i802_bss *bss = priv;
6177 struct ieee80211_mgmt mgmt;
6178
6179 memset(&mgmt, 0, sizeof(mgmt));
6180 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
6181 WLAN_FC_STYPE_DEAUTH);
6182 memcpy(mgmt.da, addr, ETH_ALEN);
6183 memcpy(mgmt.sa, own_addr, ETH_ALEN);
6184 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
6185 mgmt.u.deauth.reason_code = host_to_le16(reason);
6186 return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
6187 IEEE80211_HDRLEN +
6188 sizeof(mgmt.u.deauth));
6189 }
6190
6191
6192 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
6193 int reason)
6194 {
6195 struct i802_bss *bss = priv;
6196 struct ieee80211_mgmt mgmt;
6197
6198 memset(&mgmt, 0, sizeof(mgmt));
6199 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
6200 WLAN_FC_STYPE_DISASSOC);
6201 memcpy(mgmt.da, addr, ETH_ALEN);
6202 memcpy(mgmt.sa, own_addr, ETH_ALEN);
6203 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
6204 mgmt.u.disassoc.reason_code = host_to_le16(reason);
6205 return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
6206 IEEE80211_HDRLEN +
6207 sizeof(mgmt.u.disassoc));
6208 }
6209
6210 #endif /* HOSTAPD || CONFIG_AP */
6211
6212 #ifdef HOSTAPD
6213
6214 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
6215 {
6216 int i;
6217 int *old;
6218
6219 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
6220 ifidx);
6221 for (i = 0; i < drv->num_if_indices; i++) {
6222 if (drv->if_indices[i] == 0) {
6223 drv->if_indices[i] = ifidx;
6224 return;
6225 }
6226 }
6227
6228 if (drv->if_indices != drv->default_if_indices)
6229 old = drv->if_indices;
6230 else
6231 old = NULL;
6232
6233 drv->if_indices = os_realloc(old,
6234 sizeof(int) * (drv->num_if_indices + 1));
6235 if (!drv->if_indices) {
6236 if (!old)
6237 drv->if_indices = drv->default_if_indices;
6238 else
6239 drv->if_indices = old;
6240 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
6241 "interfaces");
6242 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
6243 return;
6244 } else if (!old)
6245 os_memcpy(drv->if_indices, drv->default_if_indices,
6246 sizeof(drv->default_if_indices));
6247 drv->if_indices[drv->num_if_indices] = ifidx;
6248 drv->num_if_indices++;
6249 }
6250
6251
6252 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
6253 {
6254 int i;
6255
6256 for (i = 0; i < drv->num_if_indices; i++) {
6257 if (drv->if_indices[i] == ifidx) {
6258 drv->if_indices[i] = 0;
6259 break;
6260 }
6261 }
6262 }
6263
6264
6265 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
6266 {
6267 int i;
6268
6269 for (i = 0; i < drv->num_if_indices; i++)
6270 if (drv->if_indices[i] == ifidx)
6271 return 1;
6272
6273 return 0;
6274 }
6275
6276
6277 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val,
6278 const char *bridge_ifname)
6279 {
6280 struct i802_bss *bss = priv;
6281 struct wpa_driver_nl80211_data *drv = bss->drv;
6282 char name[IFNAMSIZ + 1];
6283
6284 os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
6285 wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
6286 " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
6287 if (val) {
6288 if (!if_nametoindex(name)) {
6289 if (nl80211_create_iface(drv, name,
6290 NL80211_IFTYPE_AP_VLAN,
6291 NULL, 1) < 0)
6292 return -1;
6293 if (bridge_ifname &&
6294 linux_br_add_if(drv->ioctl_sock, bridge_ifname,
6295 name) < 0)
6296 return -1;
6297 }
6298 linux_set_iface_flags(drv->ioctl_sock, name, 1);
6299 return i802_set_sta_vlan(priv, addr, name, 0);
6300 } else {
6301 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
6302 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
6303 name);
6304 }
6305 }
6306
6307
6308 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
6309 {
6310 struct wpa_driver_nl80211_data *drv = eloop_ctx;
6311 struct sockaddr_ll lladdr;
6312 unsigned char buf[3000];
6313 int len;
6314 socklen_t fromlen = sizeof(lladdr);
6315
6316 len = recvfrom(sock, buf, sizeof(buf), 0,
6317 (struct sockaddr *)&lladdr, &fromlen);
6318 if (len < 0) {
6319 perror("recv");
6320 return;
6321 }
6322
6323 if (have_ifidx(drv, lladdr.sll_ifindex))
6324 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
6325 }
6326
6327
6328 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
6329 struct i802_bss *bss,
6330 const char *brname, const char *ifname)
6331 {
6332 int ifindex;
6333 char in_br[IFNAMSIZ];
6334
6335 os_strlcpy(bss->brname, brname, IFNAMSIZ);
6336 ifindex = if_nametoindex(brname);
6337 if (ifindex == 0) {
6338 /*
6339 * Bridge was configured, but the bridge device does
6340 * not exist. Try to add it now.
6341 */
6342 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
6343 wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
6344 "bridge interface %s: %s",
6345 brname, strerror(errno));
6346 return -1;
6347 }
6348 bss->added_bridge = 1;
6349 add_ifidx(drv, if_nametoindex(brname));
6350 }
6351
6352 if (linux_br_get(in_br, ifname) == 0) {
6353 if (os_strcmp(in_br, brname) == 0)
6354 return 0; /* already in the bridge */
6355
6356 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
6357 "bridge %s", ifname, in_br);
6358 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
6359 wpa_printf(MSG_ERROR, "nl80211: Failed to "
6360 "remove interface %s from bridge "
6361 "%s: %s",
6362 ifname, brname, strerror(errno));
6363 return -1;
6364 }
6365 }
6366
6367 wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
6368 ifname, brname);
6369 if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
6370 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
6371 "into bridge %s: %s",
6372 ifname, brname, strerror(errno));
6373 return -1;
6374 }
6375 bss->added_if_into_bridge = 1;
6376
6377 return 0;
6378 }
6379
6380
6381 static void *i802_init(struct hostapd_data *hapd,
6382 struct wpa_init_params *params)
6383 {
6384 struct wpa_driver_nl80211_data *drv;
6385 struct i802_bss *bss;
6386 size_t i;
6387 char brname[IFNAMSIZ];
6388 int ifindex, br_ifindex;
6389 int br_added = 0;
6390
6391 bss = wpa_driver_nl80211_init(hapd, params->ifname,
6392 params->global_priv);
6393 if (bss == NULL)
6394 return NULL;
6395
6396 drv = bss->drv;
6397 drv->nlmode = NL80211_IFTYPE_AP;
6398 drv->eapol_sock = -1;
6399
6400 if (linux_br_get(brname, params->ifname) == 0) {
6401 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
6402 params->ifname, brname);
6403 br_ifindex = if_nametoindex(brname);
6404 } else {
6405 brname[0] = '\0';
6406 br_ifindex = 0;
6407 }
6408
6409 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
6410 drv->if_indices = drv->default_if_indices;
6411 for (i = 0; i < params->num_bridge; i++) {
6412 if (params->bridge[i]) {
6413 ifindex = if_nametoindex(params->bridge[i]);
6414 if (ifindex)
6415 add_ifidx(drv, ifindex);
6416 if (ifindex == br_ifindex)
6417 br_added = 1;
6418 }
6419 }
6420 if (!br_added && br_ifindex &&
6421 (params->num_bridge == 0 || !params->bridge[0]))
6422 add_ifidx(drv, br_ifindex);
6423
6424 /* start listening for EAPOL on the default AP interface */
6425 add_ifidx(drv, drv->ifindex);
6426
6427 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
6428 goto failed;
6429
6430 if (params->bssid) {
6431 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
6432 params->bssid))
6433 goto failed;
6434 }
6435
6436 if (wpa_driver_nl80211_set_mode(bss, drv->nlmode)) {
6437 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
6438 "into AP mode", bss->ifname);
6439 goto failed;
6440 }
6441
6442 if (params->num_bridge && params->bridge[0] &&
6443 i802_check_bridge(drv, bss, params->bridge[0], params->ifname) < 0)
6444 goto failed;
6445
6446 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
6447 goto failed;
6448
6449 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
6450 if (drv->eapol_sock < 0) {
6451 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
6452 goto failed;
6453 }
6454
6455 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
6456 {
6457 printf("Could not register read socket for eapol\n");
6458 goto failed;
6459 }
6460
6461 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
6462 goto failed;
6463
6464 return bss;
6465
6466 failed:
6467 wpa_driver_nl80211_deinit(bss);
6468 return NULL;
6469 }
6470
6471
6472 static void i802_deinit(void *priv)
6473 {
6474 wpa_driver_nl80211_deinit(priv);
6475 }
6476
6477 #endif /* HOSTAPD */
6478
6479
6480 static enum nl80211_iftype wpa_driver_nl80211_if_type(
6481 enum wpa_driver_if_type type)
6482 {
6483 switch (type) {
6484 case WPA_IF_STATION:
6485 return NL80211_IFTYPE_STATION;
6486 case WPA_IF_P2P_CLIENT:
6487 case WPA_IF_P2P_GROUP:
6488 return NL80211_IFTYPE_P2P_CLIENT;
6489 case WPA_IF_AP_VLAN:
6490 return NL80211_IFTYPE_AP_VLAN;
6491 case WPA_IF_AP_BSS:
6492 return NL80211_IFTYPE_AP;
6493 case WPA_IF_P2P_GO:
6494 return NL80211_IFTYPE_P2P_GO;
6495 }
6496 return -1;
6497 }
6498
6499
6500 #ifdef CONFIG_P2P
6501
6502 static int nl80211_addr_in_use(struct nl80211_global *global, const u8 *addr)
6503 {
6504 struct wpa_driver_nl80211_data *drv;
6505 dl_list_for_each(drv, &global->interfaces,
6506 struct wpa_driver_nl80211_data, list) {
6507 if (os_memcmp(addr, drv->addr, ETH_ALEN) == 0)
6508 return 1;
6509 }
6510 return 0;
6511 }
6512
6513
6514 static int nl80211_p2p_interface_addr(struct wpa_driver_nl80211_data *drv,
6515 u8 *new_addr)
6516 {
6517 unsigned int idx;
6518
6519 if (!drv->global)
6520 return -1;
6521
6522 os_memcpy(new_addr, drv->addr, ETH_ALEN);
6523 for (idx = 0; idx < 64; idx++) {
6524 new_addr[0] = drv->addr[0] | 0x02;
6525 new_addr[0] ^= idx << 2;
6526 if (!nl80211_addr_in_use(drv->global, new_addr))
6527 break;
6528 }
6529 if (idx == 64)
6530 return -1;
6531
6532 wpa_printf(MSG_DEBUG, "nl80211: Assigned new P2P Interface Address "
6533 MACSTR, MAC2STR(new_addr));
6534
6535 return 0;
6536 }
6537
6538 #endif /* CONFIG_P2P */
6539
6540
6541 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
6542 const char *ifname, const u8 *addr,
6543 void *bss_ctx, void **drv_priv,
6544 char *force_ifname, u8 *if_addr,
6545 const char *bridge)
6546 {
6547 struct i802_bss *bss = priv;
6548 struct wpa_driver_nl80211_data *drv = bss->drv;
6549 int ifidx;
6550 #ifdef HOSTAPD
6551 struct i802_bss *new_bss = NULL;
6552
6553 if (type == WPA_IF_AP_BSS) {
6554 new_bss = os_zalloc(sizeof(*new_bss));
6555 if (new_bss == NULL)
6556 return -1;
6557 }
6558 #endif /* HOSTAPD */
6559
6560 if (addr)
6561 os_memcpy(if_addr, addr, ETH_ALEN);
6562 ifidx = nl80211_create_iface(drv, ifname,
6563 wpa_driver_nl80211_if_type(type), addr,
6564 0);
6565 if (ifidx < 0) {
6566 #ifdef HOSTAPD
6567 os_free(new_bss);
6568 #endif /* HOSTAPD */
6569 return -1;
6570 }
6571
6572 if (!addr &&
6573 linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0) {
6574 nl80211_remove_iface(drv, ifidx);
6575 return -1;
6576 }
6577
6578 #ifdef CONFIG_P2P
6579 if (!addr &&
6580 (type == WPA_IF_P2P_CLIENT || type == WPA_IF_P2P_GROUP ||
6581 type == WPA_IF_P2P_GO)) {
6582 /* Enforce unique P2P Interface Address */
6583 u8 new_addr[ETH_ALEN], own_addr[ETH_ALEN];
6584
6585 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr)
6586 < 0 ||
6587 linux_get_ifhwaddr(drv->ioctl_sock, ifname, new_addr) < 0)
6588 {
6589 nl80211_remove_iface(drv, ifidx);
6590 return -1;
6591 }
6592 if (os_memcmp(own_addr, new_addr, ETH_ALEN) == 0) {
6593 wpa_printf(MSG_DEBUG, "nl80211: Allocate new address "
6594 "for P2P group interface");
6595 if (nl80211_p2p_interface_addr(drv, new_addr) < 0) {
6596 nl80211_remove_iface(drv, ifidx);
6597 return -1;
6598 }
6599 if (linux_set_ifhwaddr(drv->ioctl_sock, ifname,
6600 new_addr) < 0) {
6601 nl80211_remove_iface(drv, ifidx);
6602 return -1;
6603 }
6604 }
6605 os_memcpy(if_addr, new_addr, ETH_ALEN);
6606 }
6607 #endif /* CONFIG_P2P */
6608
6609 #ifdef HOSTAPD
6610 if (bridge &&
6611 i802_check_bridge(drv, new_bss, bridge, ifname) < 0) {
6612 wpa_printf(MSG_ERROR, "nl80211: Failed to add the new "
6613 "interface %s to a bridge %s", ifname, bridge);
6614 nl80211_remove_iface(drv, ifidx);
6615 os_free(new_bss);
6616 return -1;
6617 }
6618
6619 if (type == WPA_IF_AP_BSS) {
6620 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
6621 nl80211_remove_iface(drv, ifidx);
6622 os_free(new_bss);
6623 return -1;
6624 }
6625 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
6626 new_bss->ifindex = ifidx;
6627 new_bss->drv = drv;
6628 new_bss->next = drv->first_bss.next;
6629 drv->first_bss.next = new_bss;
6630 if (drv_priv)
6631 *drv_priv = new_bss;
6632 }
6633 #endif /* HOSTAPD */
6634
6635 if (drv->global)
6636 drv->global->if_add_ifindex = ifidx;
6637
6638 return 0;
6639 }
6640
6641
6642 static int wpa_driver_nl80211_if_remove(void *priv,
6643 enum wpa_driver_if_type type,
6644 const char *ifname)
6645 {
6646 struct i802_bss *bss = priv;
6647 struct wpa_driver_nl80211_data *drv = bss->drv;
6648 int ifindex = if_nametoindex(ifname);
6649
6650 wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
6651 __func__, type, ifname, ifindex);
6652 if (ifindex <= 0)
6653 return -1;
6654
6655 #ifdef HOSTAPD
6656 if (bss->added_if_into_bridge) {
6657 if (linux_br_del_if(drv->ioctl_sock, bss->brname, bss->ifname)
6658 < 0)
6659 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
6660 "interface %s from bridge %s: %s",
6661 bss->ifname, bss->brname, strerror(errno));
6662 }
6663 if (bss->added_bridge) {
6664 if (linux_br_del(drv->ioctl_sock, bss->brname) < 0)
6665 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
6666 "bridge %s: %s",
6667 bss->brname, strerror(errno));
6668 }
6669 #endif /* HOSTAPD */
6670
6671 nl80211_remove_iface(drv, ifindex);
6672
6673 #ifdef HOSTAPD
6674 if (type != WPA_IF_AP_BSS)
6675 return 0;
6676
6677 if (bss != &drv->first_bss) {
6678 struct i802_bss *tbss;
6679
6680 for (tbss = &drv->first_bss; tbss; tbss = tbss->next) {
6681 if (tbss->next == bss) {
6682 tbss->next = bss->next;
6683 os_free(bss);
6684 bss = NULL;
6685 break;
6686 }
6687 }
6688 if (bss)
6689 wpa_printf(MSG_INFO, "nl80211: %s - could not find "
6690 "BSS %p in the list", __func__, bss);
6691 }
6692 #endif /* HOSTAPD */
6693
6694 return 0;
6695 }
6696
6697
6698 static int cookie_handler(struct nl_msg *msg, void *arg)
6699 {
6700 struct nlattr *tb[NL80211_ATTR_MAX + 1];
6701 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
6702 u64 *cookie = arg;
6703 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
6704 genlmsg_attrlen(gnlh, 0), NULL);
6705 if (tb[NL80211_ATTR_COOKIE])
6706 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
6707 return NL_SKIP;
6708 }
6709
6710
6711 static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
6712 unsigned int freq, unsigned int wait,
6713 const u8 *buf, size_t buf_len,
6714 u64 *cookie_out)
6715 {
6716 struct nl_msg *msg;
6717 u64 cookie;
6718 int ret = -1;
6719
6720 msg = nlmsg_alloc();
6721 if (!msg)
6722 return -1;
6723
6724 nl80211_cmd(drv, msg, 0, NL80211_CMD_FRAME);
6725
6726 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6727 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6728 if (wait)
6729 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, wait);
6730 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
6731 NLA_PUT(msg, NL80211_ATTR_FRAME, buf_len, buf);
6732
6733 cookie = 0;
6734 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
6735 msg = NULL;
6736 if (ret) {
6737 wpa_printf(MSG_DEBUG, "nl80211: Frame command failed: ret=%d "
6738 "(%s) (freq=%u wait=%u)", ret, strerror(-ret),
6739 freq, wait);
6740 goto nla_put_failure;
6741 }
6742 wpa_printf(MSG_DEBUG, "nl80211: Frame TX command accepted; "
6743 "cookie 0x%llx", (long long unsigned int) cookie);
6744
6745 if (cookie_out)
6746 *cookie_out = cookie;
6747
6748 nla_put_failure:
6749 nlmsg_free(msg);
6750 return ret;
6751 }
6752
6753
6754 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
6755 unsigned int wait_time,
6756 const u8 *dst, const u8 *src,
6757 const u8 *bssid,
6758 const u8 *data, size_t data_len)
6759 {
6760 struct i802_bss *bss = priv;
6761 struct wpa_driver_nl80211_data *drv = bss->drv;
6762 int ret = -1;
6763 u8 *buf;
6764 struct ieee80211_hdr *hdr;
6765
6766 wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d, "
6767 "wait=%d ms)", drv->ifindex, wait_time);
6768
6769 buf = os_zalloc(24 + data_len);
6770 if (buf == NULL)
6771 return ret;
6772 os_memcpy(buf + 24, data, data_len);
6773 hdr = (struct ieee80211_hdr *) buf;
6774 hdr->frame_control =
6775 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
6776 os_memcpy(hdr->addr1, dst, ETH_ALEN);
6777 os_memcpy(hdr->addr2, src, ETH_ALEN);
6778 os_memcpy(hdr->addr3, bssid, ETH_ALEN);
6779
6780 if (is_ap_interface(drv->nlmode))
6781 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
6782 else
6783 ret = nl80211_send_frame_cmd(drv, freq, wait_time, buf,
6784 24 + data_len,
6785 &drv->send_action_cookie);
6786
6787 os_free(buf);
6788 return ret;
6789 }
6790
6791
6792 static void wpa_driver_nl80211_send_action_cancel_wait(void *priv)
6793 {
6794 struct i802_bss *bss = priv;
6795 struct wpa_driver_nl80211_data *drv = bss->drv;
6796 struct nl_msg *msg;
6797 int ret;
6798
6799 msg = nlmsg_alloc();
6800 if (!msg)
6801 return;
6802
6803 nl80211_cmd(drv, msg, 0, NL80211_CMD_FRAME_WAIT_CANCEL);
6804
6805 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6806 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->send_action_cookie);
6807
6808 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6809 msg = NULL;
6810 if (ret)
6811 wpa_printf(MSG_DEBUG, "nl80211: wait cancel failed: ret=%d "
6812 "(%s)", ret, strerror(-ret));
6813
6814 nla_put_failure:
6815 nlmsg_free(msg);
6816 }
6817
6818
6819 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
6820 unsigned int duration)
6821 {
6822 struct i802_bss *bss = priv;
6823 struct wpa_driver_nl80211_data *drv = bss->drv;
6824 struct nl_msg *msg;
6825 int ret;
6826 u64 cookie;
6827
6828 msg = nlmsg_alloc();
6829 if (!msg)
6830 return -1;
6831
6832 nl80211_cmd(drv, msg, 0, NL80211_CMD_REMAIN_ON_CHANNEL);
6833
6834 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6835 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6836 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6837
6838 cookie = 0;
6839 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
6840 if (ret == 0) {
6841 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
6842 "0x%llx for freq=%u MHz duration=%u",
6843 (long long unsigned int) cookie, freq, duration);
6844 drv->remain_on_chan_cookie = cookie;
6845 drv->pending_remain_on_chan = 1;
6846 return 0;
6847 }
6848 wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
6849 "(freq=%d duration=%u): %d (%s)",
6850 freq, duration, ret, strerror(-ret));
6851 nla_put_failure:
6852 return -1;
6853 }
6854
6855
6856 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
6857 {
6858 struct i802_bss *bss = priv;
6859 struct wpa_driver_nl80211_data *drv = bss->drv;
6860 struct nl_msg *msg;
6861 int ret;
6862
6863 if (!drv->pending_remain_on_chan) {
6864 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
6865 "to cancel");
6866 return -1;
6867 }
6868
6869 wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
6870 "0x%llx",
6871 (long long unsigned int) drv->remain_on_chan_cookie);
6872
6873 msg = nlmsg_alloc();
6874 if (!msg)
6875 return -1;
6876
6877 nl80211_cmd(drv, msg, 0, NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL);
6878
6879 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6880 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
6881
6882 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6883 if (ret == 0)
6884 return 0;
6885 wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
6886 "%d (%s)", ret, strerror(-ret));
6887 nla_put_failure:
6888 return -1;
6889 }
6890
6891
6892 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
6893 {
6894 struct i802_bss *bss = priv;
6895 struct wpa_driver_nl80211_data *drv = bss->drv;
6896
6897 if (!report) {
6898 if (drv->nl_handle_preq) {
6899 eloop_unregister_read_sock(
6900 nl_socket_get_fd(drv->nl_handle_preq));
6901 nl_cache_free(drv->nl_cache_preq);
6902 nl80211_handle_destroy(drv->nl_handle_preq);
6903 drv->nl_handle_preq = NULL;
6904 }
6905 return 0;
6906 }
6907
6908 if (drv->nl_handle_preq) {
6909 wpa_printf(MSG_DEBUG, "nl80211: Probe Request reporting "
6910 "already on!");
6911 return 0;
6912 }
6913
6914 drv->nl_handle_preq = nl80211_handle_alloc(drv->nl_cb);
6915 if (drv->nl_handle_preq == NULL) {
6916 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate "
6917 "netlink callbacks (preq)");
6918 goto out_err1;
6919 }
6920
6921 if (genl_connect(drv->nl_handle_preq)) {
6922 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to "
6923 "generic netlink (preq)");
6924 goto out_err2;
6925 return -1;
6926 }
6927
6928 if (genl_ctrl_alloc_cache(drv->nl_handle_preq,
6929 &drv->nl_cache_preq) < 0) {
6930 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
6931 "netlink cache (preq)");
6932 goto out_err2;
6933 }
6934
6935 if (nl80211_register_frame(drv, drv->nl_handle_preq,
6936 (WLAN_FC_TYPE_MGMT << 2) |
6937 (WLAN_FC_STYPE_PROBE_REQ << 4),
6938 NULL, 0) < 0) {
6939 goto out_err3;
6940 }
6941
6942 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_preq),
6943 wpa_driver_nl80211_event_receive, drv,
6944 drv->nl_handle_preq);
6945
6946 return 0;
6947
6948 out_err3:
6949 nl_cache_free(drv->nl_cache_preq);
6950 out_err2:
6951 nl80211_handle_destroy(drv->nl_handle_preq);
6952 drv->nl_handle_preq = NULL;
6953 out_err1:
6954 return -1;
6955 }
6956
6957
6958 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
6959 int ifindex, int disabled)
6960 {
6961 struct nl_msg *msg;
6962 struct nlattr *bands, *band;
6963 int ret;
6964
6965 msg = nlmsg_alloc();
6966 if (!msg)
6967 return -1;
6968
6969 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_TX_BITRATE_MASK);
6970 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
6971
6972 bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
6973 if (!bands)
6974 goto nla_put_failure;
6975
6976 /*
6977 * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
6978 * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
6979 * rates. All 5 GHz rates are left enabled.
6980 */
6981 band = nla_nest_start(msg, NL80211_BAND_2GHZ);
6982 if (!band)
6983 goto nla_put_failure;
6984 NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
6985 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
6986 nla_nest_end(msg, band);
6987
6988 nla_nest_end(msg, bands);
6989
6990 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6991 msg = NULL;
6992 if (ret) {
6993 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
6994 "(%s)", ret, strerror(-ret));
6995 }
6996
6997 return ret;
6998
6999 nla_put_failure:
7000 nlmsg_free(msg);
7001 return -1;
7002 }
7003
7004
7005 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
7006 {
7007 struct i802_bss *bss = priv;
7008 struct wpa_driver_nl80211_data *drv = bss->drv;
7009 drv->disable_11b_rates = disabled;
7010 return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
7011 }
7012
7013
7014 static int wpa_driver_nl80211_deinit_ap(void *priv)
7015 {
7016 struct i802_bss *bss = priv;
7017 struct wpa_driver_nl80211_data *drv = bss->drv;
7018 if (!is_ap_interface(drv->nlmode))
7019 return -1;
7020 wpa_driver_nl80211_del_beacon(drv);
7021 return wpa_driver_nl80211_set_mode(priv, NL80211_IFTYPE_STATION);
7022 }
7023
7024
7025 static void wpa_driver_nl80211_resume(void *priv)
7026 {
7027 struct i802_bss *bss = priv;
7028 struct wpa_driver_nl80211_data *drv = bss->drv;
7029 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
7030 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
7031 "resume event");
7032 }
7033 }
7034
7035
7036 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
7037 const u8 *ies, size_t ies_len)
7038 {
7039 struct i802_bss *bss = priv;
7040 struct wpa_driver_nl80211_data *drv = bss->drv;
7041 int ret;
7042 u8 *data, *pos;
7043 size_t data_len;
7044 u8 own_addr[ETH_ALEN];
7045
7046 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
7047 return -1;
7048
7049 if (action != 1) {
7050 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
7051 "action %d", action);
7052 return -1;
7053 }
7054
7055 /*
7056 * Action frame payload:
7057 * Category[1] = 6 (Fast BSS Transition)
7058 * Action[1] = 1 (Fast BSS Transition Request)
7059 * STA Address
7060 * Target AP Address
7061 * FT IEs
7062 */
7063
7064 data_len = 2 + 2 * ETH_ALEN + ies_len;
7065 data = os_malloc(data_len);
7066 if (data == NULL)
7067 return -1;
7068 pos = data;
7069 *pos++ = 0x06; /* FT Action category */
7070 *pos++ = action;
7071 os_memcpy(pos, own_addr, ETH_ALEN);
7072 pos += ETH_ALEN;
7073 os_memcpy(pos, target_ap, ETH_ALEN);
7074 pos += ETH_ALEN;
7075 os_memcpy(pos, ies, ies_len);
7076
7077 ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, 0,
7078 drv->bssid, own_addr, drv->bssid,
7079 data, data_len);
7080 os_free(data);
7081
7082 return ret;
7083 }
7084
7085
7086 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
7087 {
7088 struct i802_bss *bss = priv;
7089 struct wpa_driver_nl80211_data *drv = bss->drv;
7090 struct nl_msg *msg, *cqm = NULL;
7091
7092 wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
7093 "hysteresis=%d", threshold, hysteresis);
7094
7095 msg = nlmsg_alloc();
7096 if (!msg)
7097 return -1;
7098
7099 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_CQM);
7100
7101 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
7102
7103 cqm = nlmsg_alloc();
7104 if (cqm == NULL)
7105 return -1;
7106
7107 NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
7108 NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
7109 nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
7110
7111 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
7112 return 0;
7113 msg = NULL;
7114
7115 nla_put_failure:
7116 if (cqm)
7117 nlmsg_free(cqm);
7118 nlmsg_free(msg);
7119 return -1;
7120 }
7121
7122
7123 static int nl80211_signal_poll(void *priv, struct wpa_signal_info *si)
7124 {
7125 struct i802_bss *bss = priv;
7126 struct wpa_driver_nl80211_data *drv = bss->drv;
7127 int res;
7128
7129 os_memset(si, 0, sizeof(*si));
7130 res = nl80211_get_link_signal(drv, si);
7131 if (res != 0)
7132 return res;
7133
7134 return nl80211_get_link_noise(drv, si);
7135 }
7136
7137
7138 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
7139 int encrypt)
7140 {
7141 struct i802_bss *bss = priv;
7142 struct wpa_driver_nl80211_data *drv = bss->drv;
7143 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
7144 }
7145
7146
7147 static int nl80211_set_param(void *priv, const char *param)
7148 {
7149 wpa_printf(MSG_DEBUG, "nl80211: driver param='%s'", param);
7150 if (param == NULL)
7151 return 0;
7152
7153 #ifdef CONFIG_P2P
7154 if (os_strstr(param, "use_p2p_group_interface=1")) {
7155 struct i802_bss *bss = priv;
7156 struct wpa_driver_nl80211_data *drv = bss->drv;
7157
7158 wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
7159 "interface");
7160 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
7161 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
7162 }
7163 #endif /* CONFIG_P2P */
7164
7165 return 0;
7166 }
7167
7168
7169 static void * nl80211_global_init(void)
7170 {
7171 struct nl80211_global *global;
7172 struct netlink_config *cfg;
7173
7174 global = os_zalloc(sizeof(*global));
7175 if (global == NULL)
7176 return NULL;
7177 dl_list_init(&global->interfaces);
7178 global->if_add_ifindex = -1;
7179
7180 cfg = os_zalloc(sizeof(*cfg));
7181 if (cfg == NULL)
7182 goto err;
7183
7184 cfg->ctx = global;
7185 cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
7186 cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
7187 global->netlink = netlink_init(cfg);
7188 if (global->netlink == NULL) {
7189 os_free(cfg);
7190 goto err;
7191 }
7192
7193 return global;
7194
7195 err:
7196 nl80211_global_deinit(global);
7197 return NULL;
7198 }
7199
7200
7201 static void nl80211_global_deinit(void *priv)
7202 {
7203 struct nl80211_global *global = priv;
7204 if (global == NULL)
7205 return;
7206 if (!dl_list_empty(&global->interfaces)) {
7207 wpa_printf(MSG_ERROR, "nl80211: %u interface(s) remain at "
7208 "nl80211_global_deinit",
7209 dl_list_len(&global->interfaces));
7210 }
7211
7212 if (global->netlink)
7213 netlink_deinit(global->netlink);
7214
7215 os_free(global);
7216 }
7217
7218
7219 static const char * nl80211_get_radio_name(void *priv)
7220 {
7221 struct i802_bss *bss = priv;
7222 struct wpa_driver_nl80211_data *drv = bss->drv;
7223 return drv->phyname;
7224 }
7225
7226
7227 static int nl80211_pmkid(struct i802_bss *bss, int cmd, const u8 *bssid,
7228 const u8 *pmkid)
7229 {
7230 struct nl_msg *msg;
7231
7232 msg = nlmsg_alloc();
7233 if (!msg)
7234 return -ENOMEM;
7235
7236 nl80211_cmd(bss->drv, msg, 0, cmd);
7237
7238 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
7239 if (pmkid)
7240 NLA_PUT(msg, NL80211_ATTR_PMKID, 16, pmkid);
7241 if (bssid)
7242 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7243
7244 return send_and_recv_msgs(bss->drv, msg, NULL, NULL);
7245 nla_put_failure:
7246 return -ENOBUFS;
7247 }
7248
7249
7250 static int nl80211_add_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
7251 {
7252 struct i802_bss *bss = priv;
7253 wpa_printf(MSG_DEBUG, "nl80211: Add PMKID for " MACSTR, MAC2STR(bssid));
7254 return nl80211_pmkid(bss, NL80211_CMD_SET_PMKSA, bssid, pmkid);
7255 }
7256
7257
7258 static int nl80211_remove_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
7259 {
7260 struct i802_bss *bss = priv;
7261 wpa_printf(MSG_DEBUG, "nl80211: Delete PMKID for " MACSTR,
7262 MAC2STR(bssid));
7263 return nl80211_pmkid(bss, NL80211_CMD_DEL_PMKSA, bssid, pmkid);
7264 }
7265
7266
7267 static int nl80211_flush_pmkid(void *priv)
7268 {
7269 struct i802_bss *bss = priv;
7270 wpa_printf(MSG_DEBUG, "nl80211: Flush PMKIDs");
7271 return nl80211_pmkid(bss, NL80211_CMD_FLUSH_PMKSA, NULL, NULL);
7272 }
7273
7274
7275 static void nl80211_set_rekey_info(void *priv, const u8 *kek, const u8 *kck,
7276 const u8 *replay_ctr)
7277 {
7278 struct i802_bss *bss = priv;
7279 struct wpa_driver_nl80211_data *drv = bss->drv;
7280 struct nlattr *replay_nested;
7281 struct nl_msg *msg;
7282
7283 msg = nlmsg_alloc();
7284 if (!msg)
7285 return;
7286
7287 nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7288
7289 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
7290
7291 replay_nested = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7292 if (!replay_nested)
7293 goto nla_put_failure;
7294
7295 NLA_PUT(msg, NL80211_REKEY_DATA_KEK, NL80211_KEK_LEN, kek);
7296 NLA_PUT(msg, NL80211_REKEY_DATA_KCK, NL80211_KCK_LEN, kck);
7297 NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR, NL80211_REPLAY_CTR_LEN,
7298 replay_ctr);
7299
7300 nla_nest_end(msg, replay_nested);
7301
7302 send_and_recv_msgs(drv, msg, NULL, NULL);
7303 return;
7304 nla_put_failure:
7305 nlmsg_free(msg);
7306 }
7307
7308
7309 static void nl80211_poll_client(void *priv, const u8 *own_addr, const u8 *addr,
7310 int qos)
7311 {
7312 struct i802_bss *bss = priv;
7313 struct {
7314 struct ieee80211_hdr hdr;
7315 u16 qos_ctl;
7316 } STRUCT_PACKED nulldata;
7317 size_t size;
7318
7319 /* Send data frame to poll STA and check whether this frame is ACKed */
7320
7321 os_memset(&nulldata, 0, sizeof(nulldata));
7322
7323 if (qos) {
7324 nulldata.hdr.frame_control =
7325 IEEE80211_FC(WLAN_FC_TYPE_DATA,
7326 WLAN_FC_STYPE_QOS_NULL);
7327 size = sizeof(nulldata);
7328 } else {
7329 nulldata.hdr.frame_control =
7330 IEEE80211_FC(WLAN_FC_TYPE_DATA,
7331 WLAN_FC_STYPE_NULLFUNC);
7332 size = sizeof(struct ieee80211_hdr);
7333 }
7334
7335 nulldata.hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
7336 os_memcpy(nulldata.hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN);
7337 os_memcpy(nulldata.hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
7338 os_memcpy(nulldata.hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
7339
7340 if (wpa_driver_nl80211_send_mlme(bss, (u8 *) &nulldata, size) < 0)
7341 wpa_printf(MSG_DEBUG, "nl80211_send_null_frame: Failed to "
7342 "send poll frame");
7343 }
7344
7345
7346 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
7347 .name = "nl80211",
7348 .desc = "Linux nl80211/cfg80211",
7349 .get_bssid = wpa_driver_nl80211_get_bssid,
7350 .get_ssid = wpa_driver_nl80211_get_ssid,
7351 .set_key = wpa_driver_nl80211_set_key,
7352 .scan2 = wpa_driver_nl80211_scan,
7353 .sched_scan = wpa_driver_nl80211_sched_scan,
7354 .stop_sched_scan = wpa_driver_nl80211_stop_sched_scan,
7355 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
7356 .deauthenticate = wpa_driver_nl80211_deauthenticate,
7357 .disassociate = wpa_driver_nl80211_disassociate,
7358 .authenticate = wpa_driver_nl80211_authenticate,
7359 .associate = wpa_driver_nl80211_associate,
7360 .global_init = nl80211_global_init,
7361 .global_deinit = nl80211_global_deinit,
7362 .init2 = wpa_driver_nl80211_init,
7363 .deinit = wpa_driver_nl80211_deinit,
7364 .get_capa = wpa_driver_nl80211_get_capa,
7365 .set_operstate = wpa_driver_nl80211_set_operstate,
7366 .set_supp_port = wpa_driver_nl80211_set_supp_port,
7367 .set_country = wpa_driver_nl80211_set_country,
7368 .set_ap = wpa_driver_nl80211_set_ap,
7369 .if_add = wpa_driver_nl80211_if_add,
7370 .if_remove = wpa_driver_nl80211_if_remove,
7371 .send_mlme = wpa_driver_nl80211_send_mlme,
7372 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
7373 .sta_add = wpa_driver_nl80211_sta_add,
7374 .sta_remove = wpa_driver_nl80211_sta_remove,
7375 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
7376 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
7377 #ifdef HOSTAPD
7378 .hapd_init = i802_init,
7379 .hapd_deinit = i802_deinit,
7380 .set_wds_sta = i802_set_wds_sta,
7381 #endif /* HOSTAPD */
7382 #if defined(HOSTAPD) || defined(CONFIG_AP)
7383 .get_seqnum = i802_get_seqnum,
7384 .flush = i802_flush,
7385 .read_sta_data = i802_read_sta_data,
7386 .get_inact_sec = i802_get_inact_sec,
7387 .sta_clear_stats = i802_sta_clear_stats,
7388 .set_rts = i802_set_rts,
7389 .set_frag = i802_set_frag,
7390 .set_tx_queue_params = i802_set_tx_queue_params,
7391 .set_sta_vlan = i802_set_sta_vlan,
7392 .set_rate_sets = i802_set_rate_sets,
7393 .sta_deauth = i802_sta_deauth,
7394 .sta_disassoc = i802_sta_disassoc,
7395 #endif /* HOSTAPD || CONFIG_AP */
7396 .set_freq = i802_set_freq,
7397 .send_action = wpa_driver_nl80211_send_action,
7398 .send_action_cancel_wait = wpa_driver_nl80211_send_action_cancel_wait,
7399 .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
7400 .cancel_remain_on_channel =
7401 wpa_driver_nl80211_cancel_remain_on_channel,
7402 .probe_req_report = wpa_driver_nl80211_probe_req_report,
7403 .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
7404 .deinit_ap = wpa_driver_nl80211_deinit_ap,
7405 .resume = wpa_driver_nl80211_resume,
7406 .send_ft_action = nl80211_send_ft_action,
7407 .signal_monitor = nl80211_signal_monitor,
7408 .signal_poll = nl80211_signal_poll,
7409 .send_frame = nl80211_send_frame,
7410 .set_param = nl80211_set_param,
7411 .get_radio_name = nl80211_get_radio_name,
7412 .add_pmkid = nl80211_add_pmkid,
7413 .remove_pmkid = nl80211_remove_pmkid,
7414 .flush_pmkid = nl80211_flush_pmkid,
7415 .set_rekey_info = nl80211_set_rekey_info,
7416 .poll_client = nl80211_poll_client,
7417 };
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