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Add BSSID to TX/RX Action frame driver ops
[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, 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 <net/if.h>
22 #include <netlink/genl/genl.h>
23 #include <netlink/genl/family.h>
24 #include <netlink/genl/ctrl.h>
25 #include <netpacket/packet.h>
26 #include <linux/filter.h>
27 #include "nl80211_copy.h"
28
29 #include "common.h"
30 #include "eloop.h"
31 #include "common/ieee802_11_defs.h"
32 #include "netlink.h"
33 #include "linux_ioctl.h"
34 #include "radiotap.h"
35 #include "radiotap_iter.h"
36 #include "driver.h"
37
38 #ifdef CONFIG_LIBNL20
39 /* libnl 2.0 compatibility code */
40 #define nl_handle nl_sock
41 #define nl_handle_alloc_cb nl_socket_alloc_cb
42 #define nl_handle_destroy nl_socket_free
43 #endif /* CONFIG_LIBNL20 */
44
45
46 #ifndef IFF_LOWER_UP
47 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
48 #endif
49 #ifndef IFF_DORMANT
50 #define IFF_DORMANT 0x20000 /* driver signals dormant */
51 #endif
52
53 #ifndef IF_OPER_DORMANT
54 #define IF_OPER_DORMANT 5
55 #endif
56 #ifndef IF_OPER_UP
57 #define IF_OPER_UP 6
58 #endif
59
60 struct i802_bss {
61 struct i802_bss *next;
62 int ifindex;
63 unsigned int beacon_set:1;
64 };
65
66 struct wpa_driver_nl80211_data {
67 void *ctx;
68 struct netlink_data *netlink;
69 int ioctl_sock; /* socket for ioctl() use */
70 char ifname[IFNAMSIZ + 1];
71 int ifindex;
72 int if_removed;
73 struct wpa_driver_capa capa;
74 int has_capability;
75
76 int operstate;
77
78 int scan_complete_events;
79
80 struct nl_handle *nl_handle;
81 struct nl_handle *nl_handle_event;
82 struct nl_cache *nl_cache;
83 struct nl_cache *nl_cache_event;
84 struct nl_cb *nl_cb;
85 struct genl_family *nl80211;
86
87 u8 auth_bssid[ETH_ALEN];
88 u8 bssid[ETH_ALEN];
89 int associated;
90 u8 ssid[32];
91 size_t ssid_len;
92 int nlmode;
93 int ap_scan_as_station;
94 unsigned int assoc_freq;
95
96 int monitor_sock;
97 int monitor_ifidx;
98 int probe_req_report;
99 int disable_11b_rates;
100
101 unsigned int beacon_set:1;
102 unsigned int pending_remain_on_chan:1;
103
104 u64 remain_on_chan_cookie;
105
106 #ifdef HOSTAPD
107 int eapol_sock; /* socket for EAPOL frames */
108
109 int default_if_indices[16];
110 int *if_indices;
111 int num_if_indices;
112
113 struct i802_bss bss;
114
115 int last_freq;
116 int last_freq_ht;
117 #endif /* HOSTAPD */
118 };
119
120
121 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
122 void *timeout_ctx);
123 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
124 static int
125 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
126 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
127 const u8 *addr, int cmd, u16 reason_code);
128 static void nl80211_remove_monitor_interface(
129 struct wpa_driver_nl80211_data *drv);
130
131 #ifdef HOSTAPD
132 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
133 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
134 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
135 int ifindex);
136 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
137 static int wpa_driver_nl80211_if_remove(void *priv,
138 enum wpa_driver_if_type type,
139 const char *ifname);
140 #endif /* HOSTAPD */
141
142 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
143 void *timeout_ctx);
144 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
145 int ifindex, int disabled);
146
147
148 /* nl80211 code */
149 static int ack_handler(struct nl_msg *msg, void *arg)
150 {
151 int *err = arg;
152 *err = 0;
153 return NL_STOP;
154 }
155
156 static int finish_handler(struct nl_msg *msg, void *arg)
157 {
158 int *ret = arg;
159 *ret = 0;
160 return NL_SKIP;
161 }
162
163 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
164 void *arg)
165 {
166 int *ret = arg;
167 *ret = err->error;
168 return NL_SKIP;
169 }
170
171
172 static int no_seq_check(struct nl_msg *msg, void *arg)
173 {
174 return NL_OK;
175 }
176
177
178 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
179 struct nl_msg *msg,
180 int (*valid_handler)(struct nl_msg *, void *),
181 void *valid_data)
182 {
183 struct nl_cb *cb;
184 int err = -ENOMEM;
185
186 cb = nl_cb_clone(drv->nl_cb);
187 if (!cb)
188 goto out;
189
190 err = nl_send_auto_complete(drv->nl_handle, msg);
191 if (err < 0)
192 goto out;
193
194 err = 1;
195
196 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
197 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
198 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
199
200 if (valid_handler)
201 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
202 valid_handler, valid_data);
203
204 while (err > 0)
205 nl_recvmsgs(drv->nl_handle, cb);
206 out:
207 nl_cb_put(cb);
208 nlmsg_free(msg);
209 return err;
210 }
211
212
213 struct family_data {
214 const char *group;
215 int id;
216 };
217
218
219 static int family_handler(struct nl_msg *msg, void *arg)
220 {
221 struct family_data *res = arg;
222 struct nlattr *tb[CTRL_ATTR_MAX + 1];
223 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
224 struct nlattr *mcgrp;
225 int i;
226
227 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
228 genlmsg_attrlen(gnlh, 0), NULL);
229 if (!tb[CTRL_ATTR_MCAST_GROUPS])
230 return NL_SKIP;
231
232 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
233 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
234 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
235 nla_len(mcgrp), NULL);
236 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
237 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
238 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
239 res->group,
240 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
241 continue;
242 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
243 break;
244 };
245
246 return NL_SKIP;
247 }
248
249
250 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
251 const char *family, const char *group)
252 {
253 struct nl_msg *msg;
254 int ret = -1;
255 struct family_data res = { group, -ENOENT };
256
257 msg = nlmsg_alloc();
258 if (!msg)
259 return -ENOMEM;
260 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
261 0, 0, CTRL_CMD_GETFAMILY, 0);
262 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
263
264 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
265 msg = NULL;
266 if (ret == 0)
267 ret = res.id;
268
269 nla_put_failure:
270 nlmsg_free(msg);
271 return ret;
272 }
273
274
275 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
276 {
277 struct wpa_driver_nl80211_data *drv = priv;
278 if (!drv->associated)
279 return -1;
280 os_memcpy(bssid, drv->bssid, ETH_ALEN);
281 return 0;
282 }
283
284
285 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
286 {
287 struct wpa_driver_nl80211_data *drv = priv;
288 if (!drv->associated)
289 return -1;
290 os_memcpy(ssid, drv->ssid, drv->ssid_len);
291 return drv->ssid_len;
292 }
293
294
295 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
296 char *buf, size_t len, int del)
297 {
298 union wpa_event_data event;
299
300 os_memset(&event, 0, sizeof(event));
301 if (len > sizeof(event.interface_status.ifname))
302 len = sizeof(event.interface_status.ifname) - 1;
303 os_memcpy(event.interface_status.ifname, buf, len);
304 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
305 EVENT_INTERFACE_ADDED;
306
307 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
308 del ? "DEL" : "NEW",
309 event.interface_status.ifname,
310 del ? "removed" : "added");
311
312 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
313 if (del)
314 drv->if_removed = 1;
315 else
316 drv->if_removed = 0;
317 }
318
319 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
320 }
321
322
323 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
324 u8 *buf, size_t len)
325 {
326 int attrlen, rta_len;
327 struct rtattr *attr;
328
329 attrlen = len;
330 attr = (struct rtattr *) buf;
331
332 rta_len = RTA_ALIGN(sizeof(struct rtattr));
333 while (RTA_OK(attr, attrlen)) {
334 if (attr->rta_type == IFLA_IFNAME) {
335 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
336 == 0)
337 return 1;
338 else
339 break;
340 }
341 attr = RTA_NEXT(attr, attrlen);
342 }
343
344 return 0;
345 }
346
347
348 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
349 int ifindex, u8 *buf, size_t len)
350 {
351 if (drv->ifindex == ifindex)
352 return 1;
353
354 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
355 drv->ifindex = if_nametoindex(drv->ifname);
356 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
357 "interface");
358 wpa_driver_nl80211_finish_drv_init(drv);
359 return 1;
360 }
361
362 return 0;
363 }
364
365
366 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
367 struct ifinfomsg *ifi,
368 u8 *buf, size_t len)
369 {
370 struct wpa_driver_nl80211_data *drv = ctx;
371 int attrlen, rta_len;
372 struct rtattr *attr;
373
374 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
375 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
376 ifi->ifi_index);
377 return;
378 }
379
380 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
381 "(%s%s%s%s)",
382 drv->operstate, ifi->ifi_flags,
383 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
384 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
385 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
386 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
387 /*
388 * Some drivers send the association event before the operup event--in
389 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
390 * fails. This will hit us when wpa_supplicant does not need to do
391 * IEEE 802.1X authentication
392 */
393 if (drv->operstate == 1 &&
394 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
395 !(ifi->ifi_flags & IFF_RUNNING))
396 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
397 -1, IF_OPER_UP);
398
399 attrlen = len;
400 attr = (struct rtattr *) buf;
401 rta_len = RTA_ALIGN(sizeof(struct rtattr));
402 while (RTA_OK(attr, attrlen)) {
403 if (attr->rta_type == IFLA_IFNAME) {
404 wpa_driver_nl80211_event_link(
405 drv,
406 ((char *) attr) + rta_len,
407 attr->rta_len - rta_len, 0);
408 }
409 attr = RTA_NEXT(attr, attrlen);
410 }
411 }
412
413
414 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
415 struct ifinfomsg *ifi,
416 u8 *buf, size_t len)
417 {
418 struct wpa_driver_nl80211_data *drv = ctx;
419 int attrlen, rta_len;
420 struct rtattr *attr;
421
422 attrlen = len;
423 attr = (struct rtattr *) buf;
424
425 rta_len = RTA_ALIGN(sizeof(struct rtattr));
426 while (RTA_OK(attr, attrlen)) {
427 if (attr->rta_type == IFLA_IFNAME) {
428 wpa_driver_nl80211_event_link(
429 drv,
430 ((char *) attr) + rta_len,
431 attr->rta_len - rta_len, 1);
432 }
433 attr = RTA_NEXT(attr, attrlen);
434 }
435 }
436
437
438 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
439 const u8 *frame, size_t len)
440 {
441 const struct ieee80211_mgmt *mgmt;
442 union wpa_event_data event;
443
444 mgmt = (const struct ieee80211_mgmt *) frame;
445 if (len < 24 + sizeof(mgmt->u.auth)) {
446 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
447 "frame");
448 return;
449 }
450
451 os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
452 os_memset(&event, 0, sizeof(event));
453 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
454 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
455 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
456 if (len > 24 + sizeof(mgmt->u.auth)) {
457 event.auth.ies = mgmt->u.auth.variable;
458 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
459 }
460
461 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
462 }
463
464
465 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
466 const u8 *frame, size_t len)
467 {
468 const struct ieee80211_mgmt *mgmt;
469 union wpa_event_data event;
470 u16 status;
471
472 mgmt = (const struct ieee80211_mgmt *) frame;
473 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
474 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
475 "frame");
476 return;
477 }
478
479 status = le_to_host16(mgmt->u.assoc_resp.status_code);
480 if (status != WLAN_STATUS_SUCCESS) {
481 os_memset(&event, 0, sizeof(event));
482 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
483 event.assoc_reject.resp_ies =
484 (u8 *) mgmt->u.assoc_resp.variable;
485 event.assoc_reject.resp_ies_len =
486 len - 24 - sizeof(mgmt->u.assoc_resp);
487 }
488 event.assoc_reject.status_code = status;
489
490 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
491 return;
492 }
493
494 drv->associated = 1;
495 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
496
497 os_memset(&event, 0, sizeof(event));
498 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
499 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
500 event.assoc_info.resp_ies_len =
501 len - 24 - sizeof(mgmt->u.assoc_resp);
502 }
503
504 event.assoc_info.freq = drv->assoc_freq;
505
506 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
507 }
508
509
510 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
511 enum nl80211_commands cmd, struct nlattr *status,
512 struct nlattr *addr, struct nlattr *req_ie,
513 struct nlattr *resp_ie)
514 {
515 union wpa_event_data event;
516
517 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
518 /*
519 * Avoid reporting two association events that would confuse
520 * the core code.
521 */
522 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
523 "when using userspace SME", cmd);
524 return;
525 }
526
527 os_memset(&event, 0, sizeof(event));
528 if (cmd == NL80211_CMD_CONNECT &&
529 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
530 if (resp_ie) {
531 event.assoc_reject.resp_ies = nla_data(resp_ie);
532 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
533 }
534 event.assoc_reject.status_code = nla_get_u16(status);
535 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
536 return;
537 }
538
539 drv->associated = 1;
540 if (addr)
541 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
542
543 if (req_ie) {
544 event.assoc_info.req_ies = nla_data(req_ie);
545 event.assoc_info.req_ies_len = nla_len(req_ie);
546 }
547 if (resp_ie) {
548 event.assoc_info.resp_ies = nla_data(resp_ie);
549 event.assoc_info.resp_ies_len = nla_len(resp_ie);
550 }
551
552 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
553 }
554
555
556 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
557 enum nl80211_commands cmd, struct nlattr *addr)
558 {
559 union wpa_event_data event;
560 enum wpa_event_type ev;
561
562 if (nla_len(addr) != ETH_ALEN)
563 return;
564
565 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
566 cmd, MAC2STR((u8 *) nla_data(addr)));
567
568 if (cmd == NL80211_CMD_AUTHENTICATE)
569 ev = EVENT_AUTH_TIMED_OUT;
570 else if (cmd == NL80211_CMD_ASSOCIATE)
571 ev = EVENT_ASSOC_TIMED_OUT;
572 else
573 return;
574
575 os_memset(&event, 0, sizeof(event));
576 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
577 wpa_supplicant_event(drv->ctx, ev, &event);
578 }
579
580
581 static void mlme_event(struct wpa_driver_nl80211_data *drv,
582 enum nl80211_commands cmd, struct nlattr *frame,
583 struct nlattr *addr, struct nlattr *timed_out)
584 {
585 if (timed_out && addr) {
586 mlme_timeout_event(drv, cmd, addr);
587 return;
588 }
589
590 if (frame == NULL) {
591 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
592 "data", cmd);
593 return;
594 }
595
596 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
597 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
598 nla_data(frame), nla_len(frame));
599
600 switch (cmd) {
601 case NL80211_CMD_AUTHENTICATE:
602 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
603 break;
604 case NL80211_CMD_ASSOCIATE:
605 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
606 break;
607 case NL80211_CMD_DEAUTHENTICATE:
608 drv->associated = 0;
609 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
610 break;
611 case NL80211_CMD_DISASSOCIATE:
612 drv->associated = 0;
613 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
614 break;
615 default:
616 break;
617 }
618 }
619
620
621 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
622 struct nlattr *tb[])
623 {
624 union wpa_event_data data;
625
626 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
627 os_memset(&data, 0, sizeof(data));
628 if (tb[NL80211_ATTR_MAC]) {
629 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
630 nla_data(tb[NL80211_ATTR_MAC]),
631 nla_len(tb[NL80211_ATTR_MAC]));
632 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
633 }
634 if (tb[NL80211_ATTR_KEY_SEQ]) {
635 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
636 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
637 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
638 }
639 if (tb[NL80211_ATTR_KEY_TYPE]) {
640 enum nl80211_key_type key_type =
641 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
642 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
643 if (key_type == NL80211_KEYTYPE_PAIRWISE)
644 data.michael_mic_failure.unicast = 1;
645 } else
646 data.michael_mic_failure.unicast = 1;
647
648 if (tb[NL80211_ATTR_KEY_IDX]) {
649 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
650 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
651 }
652
653 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
654 }
655
656
657 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
658 struct nlattr *tb[])
659 {
660 if (tb[NL80211_ATTR_MAC] == NULL) {
661 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
662 "event");
663 return;
664 }
665 os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
666 drv->associated = 1;
667 wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
668 MAC2STR(drv->bssid));
669
670 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
671 }
672
673
674 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
675 int cancel_event, struct nlattr *tb[])
676 {
677 unsigned int freq, chan_type, duration;
678 union wpa_event_data data;
679 u64 cookie;
680
681 if (tb[NL80211_ATTR_WIPHY_FREQ])
682 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
683 else
684 freq = 0;
685
686 if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
687 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
688 else
689 chan_type = 0;
690
691 if (tb[NL80211_ATTR_DURATION])
692 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
693 else
694 duration = 0;
695
696 if (tb[NL80211_ATTR_COOKIE])
697 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
698 else
699 cookie = 0;
700
701 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
702 "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
703 cancel_event, freq, chan_type, duration,
704 (long long unsigned int) cookie,
705 cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
706
707 if (cookie != drv->remain_on_chan_cookie)
708 return; /* not for us */
709
710 drv->pending_remain_on_chan = !cancel_event;
711
712 os_memset(&data, 0, sizeof(data));
713 data.remain_on_channel.freq = freq;
714 data.remain_on_channel.duration = duration;
715 wpa_supplicant_event(drv->ctx, cancel_event ?
716 EVENT_CANCEL_REMAIN_ON_CHANNEL :
717 EVENT_REMAIN_ON_CHANNEL, &data);
718 }
719
720
721 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
722 struct nlattr *tb[])
723 {
724 union wpa_event_data event;
725 struct nlattr *nl;
726 int rem;
727 struct scan_info *info;
728 #define MAX_REPORT_FREQS 50
729 int freqs[MAX_REPORT_FREQS];
730 int num_freqs = 0;
731
732 os_memset(&event, 0, sizeof(event));
733 info = &event.scan_info;
734 info->aborted = aborted;
735
736 if (tb[NL80211_ATTR_SCAN_SSIDS]) {
737 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
738 struct wpa_driver_scan_ssid *s =
739 &info->ssids[info->num_ssids];
740 s->ssid = nla_data(nl);
741 s->ssid_len = nla_len(nl);
742 info->num_ssids++;
743 if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
744 break;
745 }
746 }
747 if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
748 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
749 {
750 freqs[num_freqs] = nla_get_u32(nl);
751 num_freqs++;
752 if (num_freqs == MAX_REPORT_FREQS - 1)
753 break;
754 }
755 info->freqs = freqs;
756 info->num_freqs = num_freqs;
757 }
758 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
759 }
760
761
762 static int process_event(struct nl_msg *msg, void *arg)
763 {
764 struct wpa_driver_nl80211_data *drv = arg;
765 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
766 struct nlattr *tb[NL80211_ATTR_MAX + 1];
767
768 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
769 genlmsg_attrlen(gnlh, 0), NULL);
770
771 if (tb[NL80211_ATTR_IFINDEX]) {
772 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
773 if (ifindex != drv->ifindex) {
774 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
775 " for foreign interface (ifindex %d)",
776 gnlh->cmd, ifindex);
777 return NL_SKIP;
778 }
779 }
780
781 if (drv->ap_scan_as_station &&
782 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
783 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
784 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
785 drv->ap_scan_as_station = 0;
786 }
787
788 switch (gnlh->cmd) {
789 case NL80211_CMD_TRIGGER_SCAN:
790 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
791 break;
792 case NL80211_CMD_NEW_SCAN_RESULTS:
793 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
794 drv->scan_complete_events = 1;
795 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
796 drv->ctx);
797 send_scan_event(drv, 0, tb);
798 break;
799 case NL80211_CMD_SCAN_ABORTED:
800 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
801 /*
802 * Need to indicate that scan results are available in order
803 * not to make wpa_supplicant stop its scanning.
804 */
805 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
806 drv->ctx);
807 send_scan_event(drv, 1, tb);
808 break;
809 case NL80211_CMD_AUTHENTICATE:
810 case NL80211_CMD_ASSOCIATE:
811 case NL80211_CMD_DEAUTHENTICATE:
812 case NL80211_CMD_DISASSOCIATE:
813 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
814 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
815 break;
816 case NL80211_CMD_CONNECT:
817 case NL80211_CMD_ROAM:
818 mlme_event_connect(drv, gnlh->cmd,
819 tb[NL80211_ATTR_STATUS_CODE],
820 tb[NL80211_ATTR_MAC],
821 tb[NL80211_ATTR_REQ_IE],
822 tb[NL80211_ATTR_RESP_IE]);
823 break;
824 case NL80211_CMD_DISCONNECT:
825 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
826 /*
827 * Avoid reporting two disassociation events that could
828 * confuse the core code.
829 */
830 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
831 "event when using userspace SME");
832 break;
833 }
834 drv->associated = 0;
835 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
836 break;
837 case NL80211_CMD_MICHAEL_MIC_FAILURE:
838 mlme_event_michael_mic_failure(drv, tb);
839 break;
840 case NL80211_CMD_JOIN_IBSS:
841 mlme_event_join_ibss(drv, tb);
842 break;
843 case NL80211_CMD_REMAIN_ON_CHANNEL:
844 mlme_event_remain_on_channel(drv, 0, tb);
845 break;
846 case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
847 mlme_event_remain_on_channel(drv, 1, tb);
848 break;
849 default:
850 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
851 "(cmd=%d)", gnlh->cmd);
852 break;
853 }
854
855 return NL_SKIP;
856 }
857
858
859 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
860 void *sock_ctx)
861 {
862 struct nl_cb *cb;
863 struct wpa_driver_nl80211_data *drv = eloop_ctx;
864
865 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
866
867 cb = nl_cb_clone(drv->nl_cb);
868 if (!cb)
869 return;
870 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
871 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
872 nl_recvmsgs(drv->nl_handle_event, cb);
873 nl_cb_put(cb);
874 }
875
876
877 /**
878 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
879 * @priv: driver_nl80211 private data
880 * @alpha2_arg: country to which to switch to
881 * Returns: 0 on success, -1 on failure
882 *
883 * This asks nl80211 to set the regulatory domain for given
884 * country ISO / IEC alpha2.
885 */
886 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
887 {
888 struct wpa_driver_nl80211_data *drv = priv;
889 char alpha2[3];
890 struct nl_msg *msg;
891
892 msg = nlmsg_alloc();
893 if (!msg)
894 return -ENOMEM;
895
896 alpha2[0] = alpha2_arg[0];
897 alpha2[1] = alpha2_arg[1];
898 alpha2[2] = '\0';
899
900 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
901 0, NL80211_CMD_REQ_SET_REG, 0);
902
903 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
904 if (send_and_recv_msgs(drv, msg, NULL, NULL))
905 return -EINVAL;
906 return 0;
907 nla_put_failure:
908 return -EINVAL;
909 }
910
911
912 #ifndef HOSTAPD
913 struct wiphy_info_data {
914 int max_scan_ssids;
915 int ap_supported;
916 int auth_supported;
917 int connect_supported;
918 };
919
920
921 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
922 {
923 struct nlattr *tb[NL80211_ATTR_MAX + 1];
924 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
925 struct wiphy_info_data *info = arg;
926
927 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
928 genlmsg_attrlen(gnlh, 0), NULL);
929
930 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
931 info->max_scan_ssids =
932 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
933
934 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
935 struct nlattr *nl_mode;
936 int i;
937 nla_for_each_nested(nl_mode,
938 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
939 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
940 info->ap_supported = 1;
941 break;
942 }
943 }
944 }
945
946 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
947 struct nlattr *nl_cmd;
948 int i;
949
950 nla_for_each_nested(nl_cmd,
951 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
952 u32 cmd = nla_get_u32(nl_cmd);
953 if (cmd == NL80211_CMD_AUTHENTICATE)
954 info->auth_supported = 1;
955 else if (cmd == NL80211_CMD_CONNECT)
956 info->connect_supported = 1;
957 }
958 }
959
960 return NL_SKIP;
961 }
962
963
964 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
965 struct wiphy_info_data *info)
966 {
967 struct nl_msg *msg;
968
969 os_memset(info, 0, sizeof(*info));
970 msg = nlmsg_alloc();
971 if (!msg)
972 return -1;
973
974 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
975 0, NL80211_CMD_GET_WIPHY, 0);
976
977 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
978
979 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
980 return 0;
981 msg = NULL;
982 nla_put_failure:
983 nlmsg_free(msg);
984 return -1;
985 }
986
987
988 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
989 {
990 struct wiphy_info_data info;
991 if (wpa_driver_nl80211_get_info(drv, &info))
992 return -1;
993 drv->has_capability = 1;
994 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
995 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
996 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
997 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
998 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
999 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1000 WPA_DRIVER_CAPA_ENC_WEP104 |
1001 WPA_DRIVER_CAPA_ENC_TKIP |
1002 WPA_DRIVER_CAPA_ENC_CCMP;
1003 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1004 WPA_DRIVER_AUTH_SHARED |
1005 WPA_DRIVER_AUTH_LEAP;
1006
1007 drv->capa.max_scan_ssids = info.max_scan_ssids;
1008 if (info.ap_supported)
1009 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1010
1011 if (info.auth_supported)
1012 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1013 else if (!info.connect_supported) {
1014 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1015 "authentication/association or connect commands");
1016 return -1;
1017 }
1018
1019 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1020
1021 return 0;
1022 }
1023 #endif /* HOSTAPD */
1024
1025
1026 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1027 void *ctx)
1028 {
1029 int ret;
1030
1031 /* Initialize generic netlink and nl80211 */
1032
1033 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1034 if (drv->nl_cb == NULL) {
1035 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1036 "callbacks");
1037 goto err1;
1038 }
1039
1040 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1041 if (drv->nl_handle == NULL) {
1042 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1043 "callbacks");
1044 goto err2;
1045 }
1046
1047 drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1048 if (drv->nl_handle_event == NULL) {
1049 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1050 "callbacks (event)");
1051 goto err2b;
1052 }
1053
1054 if (genl_connect(drv->nl_handle)) {
1055 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1056 "netlink");
1057 goto err3;
1058 }
1059
1060 if (genl_connect(drv->nl_handle_event)) {
1061 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1062 "netlink (event)");
1063 goto err3;
1064 }
1065
1066 #ifdef CONFIG_LIBNL20
1067 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1068 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1069 "netlink cache");
1070 goto err3;
1071 }
1072 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1073 0) {
1074 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1075 "netlink cache (event)");
1076 goto err3b;
1077 }
1078 #else /* CONFIG_LIBNL20 */
1079 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1080 if (drv->nl_cache == NULL) {
1081 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1082 "netlink cache");
1083 goto err3;
1084 }
1085 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1086 if (drv->nl_cache_event == NULL) {
1087 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1088 "netlink cache (event)");
1089 goto err3b;
1090 }
1091 #endif /* CONFIG_LIBNL20 */
1092
1093 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1094 if (drv->nl80211 == NULL) {
1095 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1096 "found");
1097 goto err4;
1098 }
1099
1100 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1101 if (ret >= 0)
1102 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1103 if (ret < 0) {
1104 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1105 "membership for scan events: %d (%s)",
1106 ret, strerror(-ret));
1107 goto err4;
1108 }
1109
1110 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1111 if (ret >= 0)
1112 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1113 if (ret < 0) {
1114 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1115 "membership for mlme events: %d (%s)",
1116 ret, strerror(-ret));
1117 goto err4;
1118 }
1119
1120 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1121 wpa_driver_nl80211_event_receive, drv, ctx);
1122
1123 return 0;
1124
1125 err4:
1126 nl_cache_free(drv->nl_cache_event);
1127 err3b:
1128 nl_cache_free(drv->nl_cache);
1129 err3:
1130 nl_handle_destroy(drv->nl_handle_event);
1131 err2b:
1132 nl_handle_destroy(drv->nl_handle);
1133 err2:
1134 nl_cb_put(drv->nl_cb);
1135 err1:
1136 return -1;
1137 }
1138
1139
1140 /**
1141 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1142 * @ctx: context to be used when calling wpa_supplicant functions,
1143 * e.g., wpa_supplicant_event()
1144 * @ifname: interface name, e.g., wlan0
1145 * Returns: Pointer to private data, %NULL on failure
1146 */
1147 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1148 {
1149 struct wpa_driver_nl80211_data *drv;
1150 struct netlink_config *cfg;
1151
1152 drv = os_zalloc(sizeof(*drv));
1153 if (drv == NULL)
1154 return NULL;
1155 drv->ctx = ctx;
1156 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1157 drv->monitor_ifidx = -1;
1158 drv->monitor_sock = -1;
1159 drv->ioctl_sock = -1;
1160
1161 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1162 os_free(drv);
1163 return NULL;
1164 }
1165
1166 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1167 if (drv->ioctl_sock < 0) {
1168 perror("socket(PF_INET,SOCK_DGRAM)");
1169 goto failed;
1170 }
1171
1172 cfg = os_zalloc(sizeof(*cfg));
1173 if (cfg == NULL)
1174 goto failed;
1175 cfg->ctx = drv;
1176 cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1177 cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1178 drv->netlink = netlink_init(cfg);
1179 if (drv->netlink == NULL) {
1180 os_free(cfg);
1181 goto failed;
1182 }
1183 if (wpa_driver_nl80211_finish_drv_init(drv))
1184 goto failed;
1185
1186 return drv;
1187
1188 failed:
1189 netlink_deinit(drv->netlink);
1190 if (drv->ioctl_sock >= 0)
1191 close(drv->ioctl_sock);
1192
1193 genl_family_put(drv->nl80211);
1194 nl_cache_free(drv->nl_cache);
1195 nl_handle_destroy(drv->nl_handle);
1196 nl_cb_put(drv->nl_cb);
1197
1198 os_free(drv);
1199 return NULL;
1200 }
1201
1202
1203 static int
1204 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1205 {
1206 drv->ifindex = if_nametoindex(drv->ifname);
1207
1208 #ifndef HOSTAPD
1209 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1210 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1211 "use managed mode");
1212 }
1213
1214 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
1215 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1216 drv->ifname);
1217 return -1;
1218 }
1219
1220 if (wpa_driver_nl80211_capa(drv))
1221 return -1;
1222
1223 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1224 1, IF_OPER_DORMANT);
1225 #endif /* HOSTAPD */
1226
1227 return 0;
1228 }
1229
1230
1231 #ifdef HOSTAPD
1232 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1233 {
1234 struct i802_bss *bss, *prev;
1235 bss = drv->bss.next;
1236 while (bss) {
1237 prev = bss;
1238 bss = bss->next;
1239 os_free(bss);
1240 }
1241 }
1242 #endif /* HOSTAPD */
1243
1244
1245 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1246 {
1247 struct nl_msg *msg;
1248
1249 msg = nlmsg_alloc();
1250 if (!msg)
1251 return -ENOMEM;
1252
1253 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1254 0, NL80211_CMD_DEL_BEACON, 0);
1255 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1256
1257 return send_and_recv_msgs(drv, msg, NULL, NULL);
1258 nla_put_failure:
1259 return -ENOBUFS;
1260 }
1261
1262
1263 /**
1264 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1265 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1266 *
1267 * Shut down driver interface and processing of driver events. Free
1268 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1269 */
1270 static void wpa_driver_nl80211_deinit(void *priv)
1271 {
1272 struct wpa_driver_nl80211_data *drv = priv;
1273
1274 nl80211_remove_monitor_interface(drv);
1275
1276 if (drv->nlmode == NL80211_IFTYPE_AP)
1277 wpa_driver_nl80211_del_beacon(drv);
1278
1279 #ifdef HOSTAPD
1280 if (drv->last_freq_ht) {
1281 /* Clear HT flags from the driver */
1282 struct hostapd_freq_params freq;
1283 os_memset(&freq, 0, sizeof(freq));
1284 freq.freq = drv->last_freq;
1285 i802_set_freq(priv, &freq);
1286 }
1287
1288 if (drv->eapol_sock >= 0) {
1289 eloop_unregister_read_sock(drv->eapol_sock);
1290 close(drv->eapol_sock);
1291 }
1292
1293 if (drv->if_indices != drv->default_if_indices)
1294 os_free(drv->if_indices);
1295
1296 wpa_driver_nl80211_free_bss(drv);
1297 #endif /* HOSTAPD */
1298
1299 if (drv->disable_11b_rates)
1300 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1301
1302 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1303 netlink_deinit(drv->netlink);
1304
1305 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1306
1307 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1308 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1309
1310 if (drv->ioctl_sock >= 0)
1311 close(drv->ioctl_sock);
1312
1313 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1314 genl_family_put(drv->nl80211);
1315 nl_cache_free(drv->nl_cache);
1316 nl_cache_free(drv->nl_cache_event);
1317 nl_handle_destroy(drv->nl_handle);
1318 nl_handle_destroy(drv->nl_handle_event);
1319 nl_cb_put(drv->nl_cb);
1320
1321 eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1322 drv, NULL);
1323
1324 os_free(drv);
1325 }
1326
1327
1328 /**
1329 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1330 * @eloop_ctx: Driver private data
1331 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1332 *
1333 * This function can be used as registered timeout when starting a scan to
1334 * generate a scan completed event if the driver does not report this.
1335 */
1336 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1337 {
1338 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1339 if (drv->ap_scan_as_station) {
1340 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1341 drv->ap_scan_as_station = 0;
1342 }
1343 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1344 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1345 }
1346
1347
1348 /**
1349 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1350 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1351 * @params: Scan parameters
1352 * Returns: 0 on success, -1 on failure
1353 */
1354 static int wpa_driver_nl80211_scan(void *priv,
1355 struct wpa_driver_scan_params *params)
1356 {
1357 struct wpa_driver_nl80211_data *drv = priv;
1358 int ret = 0, timeout;
1359 struct nl_msg *msg, *ssids, *freqs;
1360 size_t i;
1361
1362 msg = nlmsg_alloc();
1363 ssids = nlmsg_alloc();
1364 freqs = nlmsg_alloc();
1365 if (!msg || !ssids || !freqs) {
1366 nlmsg_free(msg);
1367 nlmsg_free(ssids);
1368 nlmsg_free(freqs);
1369 return -1;
1370 }
1371
1372 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1373 NL80211_CMD_TRIGGER_SCAN, 0);
1374
1375 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1376
1377 for (i = 0; i < params->num_ssids; i++) {
1378 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1379 params->ssids[i].ssid);
1380 }
1381 if (params->num_ssids)
1382 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1383
1384 if (params->extra_ies) {
1385 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1386 params->extra_ies);
1387 }
1388
1389 if (params->freqs) {
1390 for (i = 0; params->freqs[i]; i++)
1391 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1392 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1393 }
1394
1395 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1396 msg = NULL;
1397 if (ret) {
1398 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1399 "(%s)", ret, strerror(-ret));
1400 #ifdef HOSTAPD
1401 if (drv->nlmode == NL80211_IFTYPE_AP) {
1402 /*
1403 * mac80211 does not allow scan requests in AP mode, so
1404 * try to do this in station mode.
1405 */
1406 if (wpa_driver_nl80211_set_mode(drv,
1407 IEEE80211_MODE_INFRA))
1408 goto nla_put_failure;
1409
1410 if (wpa_driver_nl80211_scan(drv, params)) {
1411 wpa_driver_nl80211_set_mode(drv,
1412 IEEE80211_MODE_AP);
1413 goto nla_put_failure;
1414 }
1415
1416 /* Restore AP mode when processing scan results */
1417 drv->ap_scan_as_station = 1;
1418 ret = 0;
1419 } else
1420 goto nla_put_failure;
1421 #else /* HOSTAPD */
1422 goto nla_put_failure;
1423 #endif /* HOSTAPD */
1424 }
1425
1426 /* Not all drivers generate "scan completed" wireless event, so try to
1427 * read results after a timeout. */
1428 timeout = 10;
1429 if (drv->scan_complete_events) {
1430 /*
1431 * The driver seems to deliver events to notify when scan is
1432 * complete, so use longer timeout to avoid race conditions
1433 * with scanning and following association request.
1434 */
1435 timeout = 30;
1436 }
1437 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1438 "seconds", ret, timeout);
1439 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1440 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1441 drv, drv->ctx);
1442
1443 nla_put_failure:
1444 nlmsg_free(ssids);
1445 nlmsg_free(msg);
1446 nlmsg_free(freqs);
1447 return ret;
1448 }
1449
1450
1451 static int bss_info_handler(struct nl_msg *msg, void *arg)
1452 {
1453 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1454 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1455 struct nlattr *bss[NL80211_BSS_MAX + 1];
1456 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1457 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1458 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1459 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1460 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1461 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1462 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1463 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1464 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1465 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1466 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1467 };
1468 struct wpa_scan_results *res = arg;
1469 struct wpa_scan_res **tmp;
1470 struct wpa_scan_res *r;
1471 const u8 *ie;
1472 size_t ie_len;
1473
1474 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1475 genlmsg_attrlen(gnlh, 0), NULL);
1476 if (!tb[NL80211_ATTR_BSS])
1477 return NL_SKIP;
1478 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1479 bss_policy))
1480 return NL_SKIP;
1481 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1482 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1483 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1484 } else {
1485 ie = NULL;
1486 ie_len = 0;
1487 }
1488
1489 r = os_zalloc(sizeof(*r) + ie_len);
1490 if (r == NULL)
1491 return NL_SKIP;
1492 if (bss[NL80211_BSS_BSSID])
1493 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1494 ETH_ALEN);
1495 if (bss[NL80211_BSS_FREQUENCY])
1496 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1497 if (bss[NL80211_BSS_BEACON_INTERVAL])
1498 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1499 if (bss[NL80211_BSS_CAPABILITY])
1500 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1501 r->flags |= WPA_SCAN_NOISE_INVALID;
1502 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1503 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1504 r->level /= 100; /* mBm to dBm */
1505 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1506 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1507 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1508 r->flags |= WPA_SCAN_LEVEL_INVALID;
1509 } else
1510 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1511 if (bss[NL80211_BSS_TSF])
1512 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1513 if (bss[NL80211_BSS_SEEN_MS_AGO])
1514 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1515 r->ie_len = ie_len;
1516 if (ie)
1517 os_memcpy(r + 1, ie, ie_len);
1518
1519 if (bss[NL80211_BSS_STATUS]) {
1520 enum nl80211_bss_status status;
1521 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1522 switch (status) {
1523 case NL80211_BSS_STATUS_AUTHENTICATED:
1524 r->flags |= WPA_SCAN_AUTHENTICATED;
1525 break;
1526 case NL80211_BSS_STATUS_ASSOCIATED:
1527 r->flags |= WPA_SCAN_ASSOCIATED;
1528 break;
1529 default:
1530 break;
1531 }
1532 }
1533
1534 tmp = os_realloc(res->res,
1535 (res->num + 1) * sizeof(struct wpa_scan_res *));
1536 if (tmp == NULL) {
1537 os_free(r);
1538 return NL_SKIP;
1539 }
1540 tmp[res->num++] = r;
1541 res->res = tmp;
1542
1543 return NL_SKIP;
1544 }
1545
1546
1547 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1548 const u8 *addr)
1549 {
1550 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1551 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1552 "mismatch");
1553 wpa_driver_nl80211_mlme(drv, addr,
1554 NL80211_CMD_DEAUTHENTICATE,
1555 WLAN_REASON_PREV_AUTH_NOT_VALID);
1556 }
1557 }
1558
1559
1560 static void wpa_driver_nl80211_check_bss_status(
1561 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1562 {
1563 size_t i;
1564
1565 for (i = 0; i < res->num; i++) {
1566 struct wpa_scan_res *r = res->res[i];
1567 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1568 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1569 "indicates BSS status with " MACSTR
1570 " as authenticated",
1571 MAC2STR(r->bssid));
1572 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1573 os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1574 os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1575 0) {
1576 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1577 " in local state (auth=" MACSTR
1578 " assoc=" MACSTR ")",
1579 MAC2STR(drv->auth_bssid),
1580 MAC2STR(drv->bssid));
1581 }
1582 }
1583
1584 if (r->flags & WPA_SCAN_ASSOCIATED) {
1585 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1586 "indicate BSS status with " MACSTR
1587 " as associated",
1588 MAC2STR(r->bssid));
1589 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1590 !drv->associated) {
1591 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1592 "(not associated) does not match "
1593 "with BSS state");
1594 clear_state_mismatch(drv, r->bssid);
1595 } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1596 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1597 0) {
1598 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1599 "(associated with " MACSTR ") does "
1600 "not match with BSS state",
1601 MAC2STR(drv->bssid));
1602 clear_state_mismatch(drv, r->bssid);
1603 clear_state_mismatch(drv, drv->bssid);
1604 }
1605 }
1606 }
1607 }
1608
1609
1610 static void wpa_scan_results_free(struct wpa_scan_results *res)
1611 {
1612 size_t i;
1613
1614 if (res == NULL)
1615 return;
1616
1617 for (i = 0; i < res->num; i++)
1618 os_free(res->res[i]);
1619 os_free(res->res);
1620 os_free(res);
1621 }
1622
1623
1624 /**
1625 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1626 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1627 * Returns: Scan results on success, -1 on failure
1628 */
1629 static struct wpa_scan_results *
1630 wpa_driver_nl80211_get_scan_results(void *priv)
1631 {
1632 struct wpa_driver_nl80211_data *drv = priv;
1633 struct nl_msg *msg;
1634 struct wpa_scan_results *res;
1635 int ret;
1636
1637 res = os_zalloc(sizeof(*res));
1638 if (res == NULL)
1639 return NULL;
1640 msg = nlmsg_alloc();
1641 if (!msg)
1642 goto nla_put_failure;
1643
1644 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1645 NL80211_CMD_GET_SCAN, 0);
1646 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1647
1648 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1649 msg = NULL;
1650 if (ret == 0) {
1651 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1652 (unsigned long) res->num);
1653 wpa_driver_nl80211_check_bss_status(drv, res);
1654 return res;
1655 }
1656 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1657 "(%s)", ret, strerror(-ret));
1658 nla_put_failure:
1659 nlmsg_free(msg);
1660 wpa_scan_results_free(res);
1661 return NULL;
1662 }
1663
1664
1665 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1666 enum wpa_alg alg, const u8 *addr,
1667 int key_idx, int set_tx,
1668 const u8 *seq, size_t seq_len,
1669 const u8 *key, size_t key_len)
1670 {
1671 struct wpa_driver_nl80211_data *drv = priv;
1672 int ifindex = if_nametoindex(ifname);
1673 struct nl_msg *msg;
1674 int ret;
1675
1676 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1677 "set_tx=%d seq_len=%lu key_len=%lu",
1678 __func__, ifindex, alg, addr, key_idx, set_tx,
1679 (unsigned long) seq_len, (unsigned long) key_len);
1680
1681 msg = nlmsg_alloc();
1682 if (!msg)
1683 return -ENOMEM;
1684
1685 if (alg == WPA_ALG_NONE) {
1686 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1687 0, NL80211_CMD_DEL_KEY, 0);
1688 } else {
1689 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1690 0, NL80211_CMD_NEW_KEY, 0);
1691 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1692 switch (alg) {
1693 case WPA_ALG_WEP:
1694 if (key_len == 5)
1695 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1696 WLAN_CIPHER_SUITE_WEP40);
1697 else
1698 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1699 WLAN_CIPHER_SUITE_WEP104);
1700 break;
1701 case WPA_ALG_TKIP:
1702 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1703 WLAN_CIPHER_SUITE_TKIP);
1704 break;
1705 case WPA_ALG_CCMP:
1706 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1707 WLAN_CIPHER_SUITE_CCMP);
1708 break;
1709 case WPA_ALG_IGTK:
1710 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1711 WLAN_CIPHER_SUITE_AES_CMAC);
1712 break;
1713 default:
1714 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1715 "algorithm %d", __func__, alg);
1716 nlmsg_free(msg);
1717 return -1;
1718 }
1719 }
1720
1721 if (seq && seq_len)
1722 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1723
1724 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1725 {
1726 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1727 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1728 }
1729 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1730 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1731
1732 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1733 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1734 ret = 0;
1735 if (ret)
1736 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1737 ret, strerror(-ret));
1738
1739 /*
1740 * If we failed or don't need to set the default TX key (below),
1741 * we're done here.
1742 */
1743 if (ret || !set_tx || alg == WPA_ALG_NONE)
1744 return ret;
1745 #ifdef HOSTAPD /* FIX: is this needed? */
1746 if (addr)
1747 return ret;
1748 #endif /* HOSTAPD */
1749
1750 msg = nlmsg_alloc();
1751 if (!msg)
1752 return -ENOMEM;
1753
1754 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1755 0, NL80211_CMD_SET_KEY, 0);
1756 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1757 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1758 if (alg == WPA_ALG_IGTK)
1759 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1760 else
1761 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1762
1763 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1764 if (ret == -ENOENT)
1765 ret = 0;
1766 if (ret)
1767 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1768 "err=%d %s)", ret, strerror(-ret));
1769 return ret;
1770
1771 nla_put_failure:
1772 return -ENOBUFS;
1773 }
1774
1775
1776 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
1777 int key_idx, int defkey,
1778 const u8 *seq, size_t seq_len,
1779 const u8 *key, size_t key_len)
1780 {
1781 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1782 if (!key_attr)
1783 return -1;
1784
1785 if (defkey && alg == WPA_ALG_IGTK)
1786 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1787 else if (defkey)
1788 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1789
1790 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1791
1792 switch (alg) {
1793 case WPA_ALG_WEP:
1794 if (key_len == 5)
1795 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1796 WLAN_CIPHER_SUITE_WEP40);
1797 else
1798 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1799 WLAN_CIPHER_SUITE_WEP104);
1800 break;
1801 case WPA_ALG_TKIP:
1802 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1803 break;
1804 case WPA_ALG_CCMP:
1805 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1806 break;
1807 case WPA_ALG_IGTK:
1808 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1809 WLAN_CIPHER_SUITE_AES_CMAC);
1810 break;
1811 default:
1812 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1813 "algorithm %d", __func__, alg);
1814 return -1;
1815 }
1816
1817 if (seq && seq_len)
1818 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1819
1820 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1821
1822 nla_nest_end(msg, key_attr);
1823
1824 return 0;
1825 nla_put_failure:
1826 return -1;
1827 }
1828
1829
1830 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1831 struct nl_msg *msg)
1832 {
1833 int i, privacy = 0;
1834 struct nlattr *nl_keys, *nl_key;
1835
1836 for (i = 0; i < 4; i++) {
1837 if (!params->wep_key[i])
1838 continue;
1839 privacy = 1;
1840 break;
1841 }
1842 if (!privacy)
1843 return 0;
1844
1845 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1846
1847 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1848 if (!nl_keys)
1849 goto nla_put_failure;
1850
1851 for (i = 0; i < 4; i++) {
1852 if (!params->wep_key[i])
1853 continue;
1854
1855 nl_key = nla_nest_start(msg, i);
1856 if (!nl_key)
1857 goto nla_put_failure;
1858
1859 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1860 params->wep_key[i]);
1861 if (params->wep_key_len[i] == 5)
1862 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1863 WLAN_CIPHER_SUITE_WEP40);
1864 else
1865 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1866 WLAN_CIPHER_SUITE_WEP104);
1867
1868 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1869
1870 if (i == params->wep_tx_keyidx)
1871 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1872
1873 nla_nest_end(msg, nl_key);
1874 }
1875 nla_nest_end(msg, nl_keys);
1876
1877 return 0;
1878
1879 nla_put_failure:
1880 return -ENOBUFS;
1881 }
1882
1883
1884 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1885 const u8 *addr, int cmd, u16 reason_code)
1886 {
1887 int ret = -1;
1888 struct nl_msg *msg;
1889
1890 msg = nlmsg_alloc();
1891 if (!msg)
1892 return -1;
1893
1894 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1895
1896 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1897 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1898 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1899
1900 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1901 msg = NULL;
1902 if (ret) {
1903 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1904 "(%s)", ret, strerror(-ret));
1905 goto nla_put_failure;
1906 }
1907 ret = 0;
1908
1909 nla_put_failure:
1910 nlmsg_free(msg);
1911 return ret;
1912 }
1913
1914
1915 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1916 const u8 *addr, int reason_code)
1917 {
1918 wpa_printf(MSG_DEBUG, "%s", __func__);
1919 drv->associated = 0;
1920 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1921 reason_code);
1922 }
1923
1924
1925 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1926 int reason_code)
1927 {
1928 struct wpa_driver_nl80211_data *drv = priv;
1929 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1930 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1931 wpa_printf(MSG_DEBUG, "%s", __func__);
1932 drv->associated = 0;
1933 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1934 reason_code);
1935 }
1936
1937
1938 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1939 int reason_code)
1940 {
1941 struct wpa_driver_nl80211_data *drv = priv;
1942 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1943 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1944 wpa_printf(MSG_DEBUG, "%s", __func__);
1945 drv->associated = 0;
1946 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1947 reason_code);
1948 }
1949
1950
1951 static int wpa_driver_nl80211_authenticate(
1952 void *priv, struct wpa_driver_auth_params *params)
1953 {
1954 struct wpa_driver_nl80211_data *drv = priv;
1955 int ret = -1, i;
1956 struct nl_msg *msg;
1957 enum nl80211_auth_type type;
1958 int count = 0;
1959
1960 drv->associated = 0;
1961 os_memset(drv->auth_bssid, 0, ETH_ALEN);
1962
1963 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1964 return -1;
1965
1966 retry:
1967 msg = nlmsg_alloc();
1968 if (!msg)
1969 return -1;
1970
1971 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1972 drv->ifindex);
1973
1974 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1975 NL80211_CMD_AUTHENTICATE, 0);
1976
1977 for (i = 0; i < 4; i++) {
1978 if (!params->wep_key[i])
1979 continue;
1980 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1981 i,
1982 i == params->wep_tx_keyidx, NULL, 0,
1983 params->wep_key[i],
1984 params->wep_key_len[i]);
1985 if (params->wep_tx_keyidx != i)
1986 continue;
1987 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1988 params->wep_key[i], params->wep_key_len[i])) {
1989 nlmsg_free(msg);
1990 return -1;
1991 }
1992 }
1993
1994 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1995 if (params->bssid) {
1996 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1997 MAC2STR(params->bssid));
1998 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1999 }
2000 if (params->freq) {
2001 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2002 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2003 }
2004 if (params->ssid) {
2005 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2006 params->ssid, params->ssid_len);
2007 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2008 params->ssid);
2009 }
2010 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
2011 if (params->ie)
2012 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2013 /*
2014 * TODO: if multiple auth_alg options enabled, try them one by one if
2015 * the AP rejects authentication due to unknown auth alg
2016 */
2017 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2018 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2019 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2020 type = NL80211_AUTHTYPE_SHARED_KEY;
2021 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2022 type = NL80211_AUTHTYPE_NETWORK_EAP;
2023 else if (params->auth_alg & WPA_AUTH_ALG_FT)
2024 type = NL80211_AUTHTYPE_FT;
2025 else
2026 goto nla_put_failure;
2027 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
2028 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2029
2030 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2031 msg = NULL;
2032 if (ret) {
2033 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2034 "(%s)", ret, strerror(-ret));
2035 count++;
2036 if (ret == -EALREADY && count == 1 && params->bssid) {
2037 /*
2038 * mac80211 does not currently accept new
2039 * authentication if we are already authenticated. As a
2040 * workaround, force deauthentication and try again.
2041 */
2042 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2043 "after forced deauthentication");
2044 wpa_driver_nl80211_deauthenticate(
2045 drv, params->bssid,
2046 WLAN_REASON_PREV_AUTH_NOT_VALID);
2047 nlmsg_free(msg);
2048 goto retry;
2049 }
2050 goto nla_put_failure;
2051 }
2052 ret = 0;
2053 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2054 "successfully");
2055
2056 nla_put_failure:
2057 nlmsg_free(msg);
2058 return ret;
2059 }
2060
2061
2062 struct phy_info_arg {
2063 u16 *num_modes;
2064 struct hostapd_hw_modes *modes;
2065 };
2066
2067 static int phy_info_handler(struct nl_msg *msg, void *arg)
2068 {
2069 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2070 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2071 struct phy_info_arg *phy_info = arg;
2072
2073 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2074
2075 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2076 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2077 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2078 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2079 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2080 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2081 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2082 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2083 };
2084
2085 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2086 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2087 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2088 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2089 };
2090
2091 struct nlattr *nl_band;
2092 struct nlattr *nl_freq;
2093 struct nlattr *nl_rate;
2094 int rem_band, rem_freq, rem_rate;
2095 struct hostapd_hw_modes *mode;
2096 int idx, mode_is_set;
2097
2098 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2099 genlmsg_attrlen(gnlh, 0), NULL);
2100
2101 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2102 return NL_SKIP;
2103
2104 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2105 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2106 if (!mode)
2107 return NL_SKIP;
2108 phy_info->modes = mode;
2109
2110 mode_is_set = 0;
2111
2112 mode = &phy_info->modes[*(phy_info->num_modes)];
2113 memset(mode, 0, sizeof(*mode));
2114 *(phy_info->num_modes) += 1;
2115
2116 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2117 nla_len(nl_band), NULL);
2118
2119 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2120 mode->ht_capab = nla_get_u16(
2121 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2122 }
2123
2124 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2125 mode->a_mpdu_params |= nla_get_u8(
2126 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2127 0x03;
2128 }
2129
2130 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2131 mode->a_mpdu_params |= nla_get_u8(
2132 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2133 2;
2134 }
2135
2136 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2137 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2138 u8 *mcs;
2139 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2140 os_memcpy(mode->mcs_set, mcs, 16);
2141 }
2142
2143 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2144 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2145 nla_len(nl_freq), freq_policy);
2146 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2147 continue;
2148 mode->num_channels++;
2149 }
2150
2151 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2152 if (!mode->channels)
2153 return NL_SKIP;
2154
2155 idx = 0;
2156
2157 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2158 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2159 nla_len(nl_freq), freq_policy);
2160 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2161 continue;
2162
2163 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2164 mode->channels[idx].flag = 0;
2165
2166 if (!mode_is_set) {
2167 /* crude heuristic */
2168 if (mode->channels[idx].freq < 4000)
2169 mode->mode = HOSTAPD_MODE_IEEE80211B;
2170 else
2171 mode->mode = HOSTAPD_MODE_IEEE80211A;
2172 mode_is_set = 1;
2173 }
2174
2175 /* crude heuristic */
2176 if (mode->channels[idx].freq < 4000)
2177 if (mode->channels[idx].freq == 2484)
2178 mode->channels[idx].chan = 14;
2179 else
2180 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2181 else
2182 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2183
2184 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2185 mode->channels[idx].flag |=
2186 HOSTAPD_CHAN_DISABLED;
2187 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2188 mode->channels[idx].flag |=
2189 HOSTAPD_CHAN_PASSIVE_SCAN;
2190 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2191 mode->channels[idx].flag |=
2192 HOSTAPD_CHAN_NO_IBSS;
2193 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2194 mode->channels[idx].flag |=
2195 HOSTAPD_CHAN_RADAR;
2196
2197 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2198 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2199 mode->channels[idx].max_tx_power =
2200 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2201
2202 idx++;
2203 }
2204
2205 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2206 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2207 nla_len(nl_rate), rate_policy);
2208 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2209 continue;
2210 mode->num_rates++;
2211 }
2212
2213 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2214 if (!mode->rates)
2215 return NL_SKIP;
2216
2217 idx = 0;
2218
2219 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2220 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2221 nla_len(nl_rate), rate_policy);
2222 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2223 continue;
2224 mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2225
2226 /* crude heuristic */
2227 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2228 mode->rates[idx] > 200)
2229 mode->mode = HOSTAPD_MODE_IEEE80211G;
2230
2231 idx++;
2232 }
2233 }
2234
2235 return NL_SKIP;
2236 }
2237
2238 static struct hostapd_hw_modes *
2239 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2240 {
2241 u16 m;
2242 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2243 int i, mode11g_idx = -1;
2244
2245 /* If only 802.11g mode is included, use it to construct matching
2246 * 802.11b mode data. */
2247
2248 for (m = 0; m < *num_modes; m++) {
2249 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2250 return modes; /* 802.11b already included */
2251 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2252 mode11g_idx = m;
2253 }
2254
2255 if (mode11g_idx < 0)
2256 return modes; /* 2.4 GHz band not supported at all */
2257
2258 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2259 if (nmodes == NULL)
2260 return modes; /* Could not add 802.11b mode */
2261
2262 mode = &nmodes[*num_modes];
2263 os_memset(mode, 0, sizeof(*mode));
2264 (*num_modes)++;
2265 modes = nmodes;
2266
2267 mode->mode = HOSTAPD_MODE_IEEE80211B;
2268
2269 mode11g = &modes[mode11g_idx];
2270 mode->num_channels = mode11g->num_channels;
2271 mode->channels = os_malloc(mode11g->num_channels *
2272 sizeof(struct hostapd_channel_data));
2273 if (mode->channels == NULL) {
2274 (*num_modes)--;
2275 return modes; /* Could not add 802.11b mode */
2276 }
2277 os_memcpy(mode->channels, mode11g->channels,
2278 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2279
2280 mode->num_rates = 0;
2281 mode->rates = os_malloc(4 * sizeof(int));
2282 if (mode->rates == NULL) {
2283 os_free(mode->channels);
2284 (*num_modes)--;
2285 return modes; /* Could not add 802.11b mode */
2286 }
2287
2288 for (i = 0; i < mode11g->num_rates; i++) {
2289 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2290 mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2291 continue;
2292 mode->rates[mode->num_rates] = mode11g->rates[i];
2293 mode->num_rates++;
2294 if (mode->num_rates == 4)
2295 break;
2296 }
2297
2298 if (mode->num_rates == 0) {
2299 os_free(mode->channels);
2300 os_free(mode->rates);
2301 (*num_modes)--;
2302 return modes; /* No 802.11b rates */
2303 }
2304
2305 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2306 "information");
2307
2308 return modes;
2309 }
2310
2311
2312 static struct hostapd_hw_modes *
2313 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2314 {
2315 struct wpa_driver_nl80211_data *drv = priv;
2316 struct nl_msg *msg;
2317 struct phy_info_arg result = {
2318 .num_modes = num_modes,
2319 .modes = NULL,
2320 };
2321
2322 *num_modes = 0;
2323 *flags = 0;
2324
2325 msg = nlmsg_alloc();
2326 if (!msg)
2327 return NULL;
2328
2329 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2330 0, NL80211_CMD_GET_WIPHY, 0);
2331
2332 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2333
2334 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2335 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2336 nla_put_failure:
2337 return NULL;
2338 }
2339
2340
2341 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2342 const void *data, size_t len,
2343 int encrypt)
2344 {
2345 __u8 rtap_hdr[] = {
2346 0x00, 0x00, /* radiotap version */
2347 0x0e, 0x00, /* radiotap length */
2348 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2349 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2350 0x00, /* padding */
2351 0x00, 0x00, /* RX and TX flags to indicate that */
2352 0x00, 0x00, /* this is the injected frame directly */
2353 };
2354 struct iovec iov[2] = {
2355 {
2356 .iov_base = &rtap_hdr,
2357 .iov_len = sizeof(rtap_hdr),
2358 },
2359 {
2360 .iov_base = (void *) data,
2361 .iov_len = len,
2362 }
2363 };
2364 struct msghdr msg = {
2365 .msg_name = NULL,
2366 .msg_namelen = 0,
2367 .msg_iov = iov,
2368 .msg_iovlen = 2,
2369 .msg_control = NULL,
2370 .msg_controllen = 0,
2371 .msg_flags = 0,
2372 };
2373
2374 if (encrypt)
2375 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2376
2377 return sendmsg(drv->monitor_sock, &msg, 0);
2378 }
2379
2380
2381 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2382 size_t data_len)
2383 {
2384 struct wpa_driver_nl80211_data *drv = priv;
2385 struct ieee80211_mgmt *mgmt;
2386 int encrypt = 1;
2387 u16 fc;
2388
2389 mgmt = (struct ieee80211_mgmt *) data;
2390 fc = le_to_host16(mgmt->frame_control);
2391
2392 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2393 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2394 /*
2395 * Only one of the authentication frame types is encrypted.
2396 * In order for static WEP encryption to work properly (i.e.,
2397 * to not encrypt the frame), we need to tell mac80211 about
2398 * the frames that must not be encrypted.
2399 */
2400 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2401 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2402 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2403 encrypt = 0;
2404 }
2405
2406 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2407 }
2408
2409
2410 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2411 const u8 *head, size_t head_len,
2412 const u8 *tail, size_t tail_len,
2413 int dtim_period, int beacon_int)
2414 {
2415 struct wpa_driver_nl80211_data *drv = priv;
2416 struct nl_msg *msg;
2417 u8 cmd = NL80211_CMD_NEW_BEACON;
2418 int ret;
2419 int beacon_set;
2420 int ifindex = if_nametoindex(ifname);
2421 #ifdef HOSTAPD
2422 struct i802_bss *bss;
2423
2424 bss = get_bss(drv, ifindex);
2425 if (bss == NULL)
2426 return -ENOENT;
2427 beacon_set = bss->beacon_set;
2428 #else /* HOSTAPD */
2429 beacon_set = drv->beacon_set;
2430 #endif /* HOSTAPD */
2431
2432 msg = nlmsg_alloc();
2433 if (!msg)
2434 return -ENOMEM;
2435
2436 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2437 beacon_set);
2438 if (beacon_set)
2439 cmd = NL80211_CMD_SET_BEACON;
2440
2441 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2442 0, cmd, 0);
2443 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2444 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2445 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2446 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2447 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2448
2449 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2450 if (ret) {
2451 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2452 ret, strerror(-ret));
2453 } else {
2454 #ifdef HOSTAPD
2455 bss->beacon_set = 1;
2456 #else /* HOSTAPD */
2457 drv->beacon_set = 1;
2458 #endif /* HOSTAPD */
2459 }
2460 return ret;
2461 nla_put_failure:
2462 return -ENOBUFS;
2463 }
2464
2465
2466 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2467 int freq, int ht_enabled,
2468 int sec_channel_offset)
2469 {
2470 struct nl_msg *msg;
2471 int ret;
2472
2473 msg = nlmsg_alloc();
2474 if (!msg)
2475 return -1;
2476
2477 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2478 NL80211_CMD_SET_WIPHY, 0);
2479
2480 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2481 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2482 if (ht_enabled) {
2483 switch (sec_channel_offset) {
2484 case -1:
2485 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2486 NL80211_CHAN_HT40MINUS);
2487 break;
2488 case 1:
2489 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2490 NL80211_CHAN_HT40PLUS);
2491 break;
2492 default:
2493 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2494 NL80211_CHAN_HT20);
2495 break;
2496 }
2497 }
2498
2499 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2500 if (ret == 0)
2501 return 0;
2502 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2503 "%d (%s)", freq, ret, strerror(-ret));
2504 nla_put_failure:
2505 return -1;
2506 }
2507
2508
2509 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2510 struct hostapd_sta_add_params *params)
2511 {
2512 struct wpa_driver_nl80211_data *drv = priv;
2513 struct nl_msg *msg;
2514 int ret = -ENOBUFS;
2515
2516 msg = nlmsg_alloc();
2517 if (!msg)
2518 return -ENOMEM;
2519
2520 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2521 0, NL80211_CMD_NEW_STATION, 0);
2522
2523 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2524 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2525 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2526 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2527 params->supp_rates);
2528 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2529 params->listen_interval);
2530 if (params->ht_capabilities) {
2531 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2532 sizeof(*params->ht_capabilities),
2533 params->ht_capabilities);
2534 }
2535
2536 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2537 if (ret)
2538 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2539 "result: %d (%s)", ret, strerror(-ret));
2540 if (ret == -EEXIST)
2541 ret = 0;
2542 nla_put_failure:
2543 return ret;
2544 }
2545
2546
2547 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2548 {
2549 struct wpa_driver_nl80211_data *drv = priv;
2550 struct nl_msg *msg;
2551 int ret;
2552
2553 msg = nlmsg_alloc();
2554 if (!msg)
2555 return -ENOMEM;
2556
2557 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2558 0, NL80211_CMD_DEL_STATION, 0);
2559
2560 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2561 if_nametoindex(drv->ifname));
2562 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2563
2564 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2565 if (ret == -ENOENT)
2566 return 0;
2567 return ret;
2568 nla_put_failure:
2569 return -ENOBUFS;
2570 }
2571
2572
2573 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2574 int ifidx)
2575 {
2576 struct nl_msg *msg;
2577
2578 wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2579
2580 #ifdef HOSTAPD
2581 /* stop listening for EAPOL on this interface */
2582 del_ifidx(drv, ifidx);
2583 #endif /* HOSTAPD */
2584
2585 msg = nlmsg_alloc();
2586 if (!msg)
2587 goto nla_put_failure;
2588
2589 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2590 0, NL80211_CMD_DEL_INTERFACE, 0);
2591 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2592
2593 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2594 return;
2595 nla_put_failure:
2596 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2597 ifidx);
2598 }
2599
2600
2601 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2602 const char *ifname,
2603 enum nl80211_iftype iftype,
2604 const u8 *addr, int wds)
2605 {
2606 struct nl_msg *msg, *flags = NULL;
2607 int ifidx;
2608 int ret = -ENOBUFS;
2609
2610 msg = nlmsg_alloc();
2611 if (!msg)
2612 return -1;
2613
2614 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2615 0, NL80211_CMD_NEW_INTERFACE, 0);
2616 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2617 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2618 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2619
2620 if (iftype == NL80211_IFTYPE_MONITOR) {
2621 int err;
2622
2623 flags = nlmsg_alloc();
2624 if (!flags)
2625 goto nla_put_failure;
2626
2627 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2628
2629 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2630
2631 nlmsg_free(flags);
2632
2633 if (err)
2634 goto nla_put_failure;
2635 } else if (wds) {
2636 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2637 }
2638
2639 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2640 if (ret) {
2641 nla_put_failure:
2642 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2643 ifname, ret, strerror(-ret));
2644 return ret;
2645 }
2646
2647 ifidx = if_nametoindex(ifname);
2648 wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2649 ifname, ifidx);
2650
2651 if (ifidx <= 0)
2652 return -1;
2653
2654 #ifdef HOSTAPD
2655 /* start listening for EAPOL on this interface */
2656 add_ifidx(drv, ifidx);
2657 #endif /* HOSTAPD */
2658
2659 if (addr && iftype != NL80211_IFTYPE_MONITOR &&
2660 linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
2661 nl80211_remove_iface(drv, ifidx);
2662 return -1;
2663 }
2664
2665 return ifidx;
2666 }
2667
2668
2669 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2670 const char *ifname, enum nl80211_iftype iftype,
2671 const u8 *addr, int wds)
2672 {
2673 int ret;
2674
2675 ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2676
2677 /* if error occured and interface exists already */
2678 if (ret == -ENFILE && if_nametoindex(ifname)) {
2679 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2680
2681 /* Try to remove the interface that was already there. */
2682 nl80211_remove_iface(drv, if_nametoindex(ifname));
2683
2684 /* Try to create the interface again */
2685 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2686 wds);
2687 }
2688
2689 if (ret >= 0 && drv->disable_11b_rates)
2690 nl80211_disable_11b_rates(drv, ret, 1);
2691
2692 return ret;
2693 }
2694
2695
2696 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2697 {
2698 struct ieee80211_hdr *hdr;
2699 u16 fc;
2700 union wpa_event_data event;
2701
2702 hdr = (struct ieee80211_hdr *) buf;
2703 fc = le_to_host16(hdr->frame_control);
2704
2705 os_memset(&event, 0, sizeof(event));
2706 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2707 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2708 event.tx_status.dst = hdr->addr1;
2709 event.tx_status.data = buf;
2710 event.tx_status.data_len = len;
2711 event.tx_status.ack = ok;
2712 wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2713 }
2714
2715
2716 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2717 u8 *buf, size_t len)
2718 {
2719 union wpa_event_data event;
2720 os_memset(&event, 0, sizeof(event));
2721 event.rx_from_unknown.frame = buf;
2722 event.rx_from_unknown.len = len;
2723 wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2724 }
2725
2726
2727 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2728 u8 *buf, size_t len, int datarate, int ssi_signal)
2729 {
2730 struct ieee80211_hdr *hdr;
2731 u16 fc;
2732 union wpa_event_data event;
2733
2734 hdr = (struct ieee80211_hdr *) buf;
2735 fc = le_to_host16(hdr->frame_control);
2736
2737 switch (WLAN_FC_GET_TYPE(fc)) {
2738 case WLAN_FC_TYPE_MGMT:
2739 os_memset(&event, 0, sizeof(event));
2740 event.rx_mgmt.frame = buf;
2741 event.rx_mgmt.frame_len = len;
2742 event.rx_mgmt.datarate = datarate;
2743 event.rx_mgmt.ssi_signal = ssi_signal;
2744 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2745 break;
2746 case WLAN_FC_TYPE_CTRL:
2747 /* can only get here with PS-Poll frames */
2748 wpa_printf(MSG_DEBUG, "CTRL");
2749 from_unknown_sta(drv, buf, len);
2750 break;
2751 case WLAN_FC_TYPE_DATA:
2752 from_unknown_sta(drv, buf, len);
2753 break;
2754 }
2755 }
2756
2757
2758 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2759 {
2760 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2761 int len;
2762 unsigned char buf[3000];
2763 struct ieee80211_radiotap_iterator iter;
2764 int ret;
2765 int datarate = 0, ssi_signal = 0;
2766 int injected = 0, failed = 0, rxflags = 0;
2767
2768 len = recv(sock, buf, sizeof(buf), 0);
2769 if (len < 0) {
2770 perror("recv");
2771 return;
2772 }
2773
2774 if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
2775 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
2776 "frame since Probe Request reporting is disabled");
2777 return;
2778 }
2779
2780 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2781 printf("received invalid radiotap frame\n");
2782 return;
2783 }
2784
2785 while (1) {
2786 ret = ieee80211_radiotap_iterator_next(&iter);
2787 if (ret == -ENOENT)
2788 break;
2789 if (ret) {
2790 printf("received invalid radiotap frame (%d)\n", ret);
2791 return;
2792 }
2793 switch (iter.this_arg_index) {
2794 case IEEE80211_RADIOTAP_FLAGS:
2795 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2796 len -= 4;
2797 break;
2798 case IEEE80211_RADIOTAP_RX_FLAGS:
2799 rxflags = 1;
2800 break;
2801 case IEEE80211_RADIOTAP_TX_FLAGS:
2802 injected = 1;
2803 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2804 IEEE80211_RADIOTAP_F_TX_FAIL;
2805 break;
2806 case IEEE80211_RADIOTAP_DATA_RETRIES:
2807 break;
2808 case IEEE80211_RADIOTAP_CHANNEL:
2809 /* TODO: convert from freq/flags to channel number */
2810 break;
2811 case IEEE80211_RADIOTAP_RATE:
2812 datarate = *iter.this_arg * 5;
2813 break;
2814 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2815 ssi_signal = *iter.this_arg;
2816 break;
2817 }
2818 }
2819
2820 if (rxflags && injected)
2821 return;
2822
2823 if (!injected)
2824 handle_frame(drv, buf + iter.max_length,
2825 len - iter.max_length, datarate, ssi_signal);
2826 else
2827 handle_tx_callback(drv->ctx, buf + iter.max_length,
2828 len - iter.max_length, !failed);
2829 }
2830
2831
2832 /*
2833 * we post-process the filter code later and rewrite
2834 * this to the offset to the last instruction
2835 */
2836 #define PASS 0xFF
2837 #define FAIL 0xFE
2838
2839 static struct sock_filter msock_filter_insns[] = {
2840 /*
2841 * do a little-endian load of the radiotap length field
2842 */
2843 /* load lower byte into A */
2844 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2845 /* put it into X (== index register) */
2846 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2847 /* load upper byte into A */
2848 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2849 /* left-shift it by 8 */
2850 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2851 /* or with X */
2852 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2853 /* put result into X */
2854 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2855
2856 /*
2857 * Allow management frames through, this also gives us those
2858 * management frames that we sent ourselves with status
2859 */
2860 /* load the lower byte of the IEEE 802.11 frame control field */
2861 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2862 /* mask off frame type and version */
2863 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2864 /* accept frame if it's both 0, fall through otherwise */
2865 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2866
2867 /*
2868 * TODO: add a bit to radiotap RX flags that indicates
2869 * that the sending station is not associated, then
2870 * add a filter here that filters on our DA and that flag
2871 * to allow us to deauth frames to that bad station.
2872 *
2873 * Not a regression -- we didn't do it before either.
2874 */
2875
2876 #if 0
2877 /*
2878 * drop non-data frames
2879 */
2880 /* load the lower byte of the frame control field */
2881 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2882 /* mask off QoS bit */
2883 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2884 /* drop non-data frames */
2885 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2886 #endif
2887 /* load the upper byte of the frame control field */
2888 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
2889 /* mask off toDS/fromDS */
2890 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2891 /* accept WDS frames */
2892 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, PASS, 0),
2893
2894 /*
2895 * add header length to index
2896 */
2897 /* load the lower byte of the frame control field */
2898 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2899 /* mask off QoS bit */
2900 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2901 /* right shift it by 6 to give 0 or 2 */
2902 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2903 /* add data frame header length */
2904 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2905 /* add index, was start of 802.11 header */
2906 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2907 /* move to index, now start of LL header */
2908 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2909
2910 /*
2911 * Accept empty data frames, we use those for
2912 * polling activity.
2913 */
2914 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2915 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2916
2917 /*
2918 * Accept EAPOL frames
2919 */
2920 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2921 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2922 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2923 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2924
2925 /* keep these last two statements or change the code below */
2926 /* return 0 == "DROP" */
2927 BPF_STMT(BPF_RET | BPF_K, 0),
2928 /* return ~0 == "keep all" */
2929 BPF_STMT(BPF_RET | BPF_K, ~0),
2930 };
2931
2932 static struct sock_fprog msock_filter = {
2933 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2934 .filter = msock_filter_insns,
2935 };
2936
2937
2938 static int add_monitor_filter(int s)
2939 {
2940 int idx;
2941
2942 /* rewrite all PASS/FAIL jump offsets */
2943 for (idx = 0; idx < msock_filter.len; idx++) {
2944 struct sock_filter *insn = &msock_filter_insns[idx];
2945
2946 if (BPF_CLASS(insn->code) == BPF_JMP) {
2947 if (insn->code == (BPF_JMP|BPF_JA)) {
2948 if (insn->k == PASS)
2949 insn->k = msock_filter.len - idx - 2;
2950 else if (insn->k == FAIL)
2951 insn->k = msock_filter.len - idx - 3;
2952 }
2953
2954 if (insn->jt == PASS)
2955 insn->jt = msock_filter.len - idx - 2;
2956 else if (insn->jt == FAIL)
2957 insn->jt = msock_filter.len - idx - 3;
2958
2959 if (insn->jf == PASS)
2960 insn->jf = msock_filter.len - idx - 2;
2961 else if (insn->jf == FAIL)
2962 insn->jf = msock_filter.len - idx - 3;
2963 }
2964 }
2965
2966 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2967 &msock_filter, sizeof(msock_filter))) {
2968 perror("SO_ATTACH_FILTER");
2969 return -1;
2970 }
2971
2972 return 0;
2973 }
2974
2975
2976 static void nl80211_remove_monitor_interface(
2977 struct wpa_driver_nl80211_data *drv)
2978 {
2979 if (drv->monitor_ifidx >= 0) {
2980 nl80211_remove_iface(drv, drv->monitor_ifidx);
2981 drv->monitor_ifidx = -1;
2982 }
2983 if (drv->monitor_sock >= 0) {
2984 eloop_unregister_read_sock(drv->monitor_sock);
2985 close(drv->monitor_sock);
2986 drv->monitor_sock = -1;
2987 }
2988 }
2989
2990
2991 static int
2992 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2993 {
2994 char buf[IFNAMSIZ];
2995 struct sockaddr_ll ll;
2996 int optval;
2997 socklen_t optlen;
2998
2999 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3000 buf[IFNAMSIZ - 1] = '\0';
3001
3002 drv->monitor_ifidx =
3003 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3004 0);
3005
3006 if (drv->monitor_ifidx < 0)
3007 return -1;
3008
3009 if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3010 goto error;
3011
3012 memset(&ll, 0, sizeof(ll));
3013 ll.sll_family = AF_PACKET;
3014 ll.sll_ifindex = drv->monitor_ifidx;
3015 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3016 if (drv->monitor_sock < 0) {
3017 perror("socket[PF_PACKET,SOCK_RAW]");
3018 goto error;
3019 }
3020
3021 if (add_monitor_filter(drv->monitor_sock)) {
3022 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3023 "interface; do filtering in user space");
3024 /* This works, but will cost in performance. */
3025 }
3026
3027 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3028 perror("monitor socket bind");
3029 goto error;
3030 }
3031
3032 optlen = sizeof(optval);
3033 optval = 20;
3034 if (setsockopt
3035 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3036 perror("Failed to set socket priority");
3037 goto error;
3038 }
3039
3040 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3041 drv, NULL)) {
3042 printf("Could not register monitor read socket\n");
3043 goto error;
3044 }
3045
3046 return 0;
3047 error:
3048 nl80211_remove_monitor_interface(drv);
3049 return -1;
3050 }
3051
3052
3053 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3054
3055 static int wpa_driver_nl80211_hapd_send_eapol(
3056 void *priv, const u8 *addr, const u8 *data,
3057 size_t data_len, int encrypt, const u8 *own_addr)
3058 {
3059 struct wpa_driver_nl80211_data *drv = priv;
3060 struct ieee80211_hdr *hdr;
3061 size_t len;
3062 u8 *pos;
3063 int res;
3064 #if 0 /* FIX */
3065 int qos = sta->flags & WPA_STA_WMM;
3066 #else
3067 int qos = 0;
3068 #endif
3069
3070 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3071 data_len;
3072 hdr = os_zalloc(len);
3073 if (hdr == NULL) {
3074 printf("malloc() failed for i802_send_data(len=%lu)\n",
3075 (unsigned long) len);
3076 return -1;
3077 }
3078
3079 hdr->frame_control =
3080 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3081 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3082 if (encrypt)
3083 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3084 #if 0 /* To be enabled if qos determination is added above */
3085 if (qos) {
3086 hdr->frame_control |=
3087 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3088 }
3089 #endif
3090
3091 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3092 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3093 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3094 pos = (u8 *) (hdr + 1);
3095
3096 #if 0 /* To be enabled if qos determination is added above */
3097 if (qos) {
3098 /* add an empty QoS header if needed */
3099 pos[0] = 0;
3100 pos[1] = 0;
3101 pos += 2;
3102 }
3103 #endif
3104
3105 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3106 pos += sizeof(rfc1042_header);
3107 WPA_PUT_BE16(pos, ETH_P_PAE);
3108 pos += 2;
3109 memcpy(pos, data, data_len);
3110
3111 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3112 if (res < 0) {
3113 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3114 "failed: %d (%s)",
3115 (unsigned long) len, errno, strerror(errno));
3116 }
3117 os_free(hdr);
3118
3119 return res;
3120 }
3121
3122
3123 static u32 sta_flags_nl80211(int flags)
3124 {
3125 u32 f = 0;
3126
3127 if (flags & WPA_STA_AUTHORIZED)
3128 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3129 if (flags & WPA_STA_WMM)
3130 f |= BIT(NL80211_STA_FLAG_WME);
3131 if (flags & WPA_STA_SHORT_PREAMBLE)
3132 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3133 if (flags & WPA_STA_MFP)
3134 f |= BIT(NL80211_STA_FLAG_MFP);
3135
3136 return f;
3137 }
3138
3139
3140 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3141 int total_flags, int flags_or,
3142 int flags_and)
3143 {
3144 struct wpa_driver_nl80211_data *drv = priv;
3145 struct nl_msg *msg, *flags = NULL;
3146 struct nl80211_sta_flag_update upd;
3147
3148 msg = nlmsg_alloc();
3149 if (!msg)
3150 return -ENOMEM;
3151
3152 flags = nlmsg_alloc();
3153 if (!flags) {
3154 nlmsg_free(msg);
3155 return -ENOMEM;
3156 }
3157
3158 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3159 0, NL80211_CMD_SET_STATION, 0);
3160
3161 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3162 if_nametoindex(drv->ifname));
3163 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3164
3165 /*
3166 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3167 * can be removed eventually.
3168 */
3169 if (total_flags & WPA_STA_AUTHORIZED)
3170 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3171
3172 if (total_flags & WPA_STA_WMM)
3173 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3174
3175 if (total_flags & WPA_STA_SHORT_PREAMBLE)
3176 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3177
3178 if (total_flags & WPA_STA_MFP)
3179 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3180
3181 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3182 goto nla_put_failure;
3183
3184 os_memset(&upd, 0, sizeof(upd));
3185 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3186 upd.set = sta_flags_nl80211(flags_or);
3187 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3188
3189 nlmsg_free(flags);
3190
3191 return send_and_recv_msgs(drv, msg, NULL, NULL);
3192 nla_put_failure:
3193 nlmsg_free(flags);
3194 return -ENOBUFS;
3195 }
3196
3197
3198 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3199 struct wpa_driver_associate_params *params)
3200 {
3201 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3202 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3203 nl80211_remove_monitor_interface(drv);
3204 return -1;
3205 }
3206
3207 /* TODO: setup monitor interface (and add code somewhere to remove this
3208 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3209
3210 return 0;
3211 }
3212
3213
3214 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3215 {
3216 struct nl_msg *msg;
3217 int ret = -1;
3218
3219 msg = nlmsg_alloc();
3220 if (!msg)
3221 return -1;
3222
3223 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3224 NL80211_CMD_LEAVE_IBSS, 0);
3225 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3226 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3227 msg = NULL;
3228 if (ret) {
3229 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3230 "(%s)", ret, strerror(-ret));
3231 goto nla_put_failure;
3232 }
3233
3234 ret = 0;
3235 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3236
3237 nla_put_failure:
3238 nlmsg_free(msg);
3239 return ret;
3240 }
3241
3242
3243 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3244 struct wpa_driver_associate_params *params)
3245 {
3246 struct nl_msg *msg;
3247 int ret = -1;
3248 int count = 0;
3249
3250 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3251
3252 if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3253 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3254 "IBSS mode");
3255 return -1;
3256 }
3257
3258 retry:
3259 msg = nlmsg_alloc();
3260 if (!msg)
3261 return -1;
3262
3263 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3264 NL80211_CMD_JOIN_IBSS, 0);
3265 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3266
3267 if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3268 goto nla_put_failure;
3269
3270 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3271 params->ssid, params->ssid_len);
3272 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3273 params->ssid);
3274 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3275 drv->ssid_len = params->ssid_len;
3276
3277 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3278 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3279
3280 ret = nl80211_set_conn_keys(params, msg);
3281 if (ret)
3282 goto nla_put_failure;
3283
3284 if (params->wpa_ie) {
3285 wpa_hexdump(MSG_DEBUG,
3286 " * Extra IEs for Beacon/Probe Response frames",
3287 params->wpa_ie, params->wpa_ie_len);
3288 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3289 params->wpa_ie);
3290 }
3291
3292 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3293 msg = NULL;
3294 if (ret) {
3295 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3296 ret, strerror(-ret));
3297 count++;
3298 if (ret == -EALREADY && count == 1) {
3299 wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3300 "forced leave");
3301 nl80211_leave_ibss(drv);
3302 nlmsg_free(msg);
3303 goto retry;
3304 }
3305
3306 goto nla_put_failure;
3307 }
3308 ret = 0;
3309 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3310
3311 nla_put_failure:
3312 nlmsg_free(msg);
3313 return ret;
3314 }
3315
3316
3317 static int wpa_driver_nl80211_connect(
3318 struct wpa_driver_nl80211_data *drv,
3319 struct wpa_driver_associate_params *params)
3320 {
3321 struct nl_msg *msg;
3322 enum nl80211_auth_type type;
3323 int ret = 0;
3324
3325 msg = nlmsg_alloc();
3326 if (!msg)
3327 return -1;
3328
3329 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3330 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3331 NL80211_CMD_CONNECT, 0);
3332
3333 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3334 if (params->bssid) {
3335 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3336 MAC2STR(params->bssid));
3337 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3338 }
3339 if (params->freq) {
3340 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3341 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3342 }
3343 if (params->ssid) {
3344 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3345 params->ssid, params->ssid_len);
3346 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3347 params->ssid);
3348 if (params->ssid_len > sizeof(drv->ssid))
3349 goto nla_put_failure;
3350 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3351 drv->ssid_len = params->ssid_len;
3352 }
3353 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3354 if (params->wpa_ie)
3355 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3356 params->wpa_ie);
3357
3358 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3359 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3360 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3361 type = NL80211_AUTHTYPE_SHARED_KEY;
3362 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3363 type = NL80211_AUTHTYPE_NETWORK_EAP;
3364 else if (params->auth_alg & WPA_AUTH_ALG_FT)
3365 type = NL80211_AUTHTYPE_FT;
3366 else
3367 goto nla_put_failure;
3368
3369 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3370 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3371
3372 if (params->wpa_ie && params->wpa_ie_len) {
3373 enum nl80211_wpa_versions ver;
3374
3375 if (params->wpa_ie[0] == WLAN_EID_RSN)
3376 ver = NL80211_WPA_VERSION_2;
3377 else
3378 ver = NL80211_WPA_VERSION_1;
3379
3380 wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
3381 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3382 }
3383
3384 if (params->pairwise_suite != CIPHER_NONE) {
3385 int cipher;
3386
3387 switch (params->pairwise_suite) {
3388 case CIPHER_WEP40:
3389 cipher = WLAN_CIPHER_SUITE_WEP40;
3390 break;
3391 case CIPHER_WEP104:
3392 cipher = WLAN_CIPHER_SUITE_WEP104;
3393 break;
3394 case CIPHER_CCMP:
3395 cipher = WLAN_CIPHER_SUITE_CCMP;
3396 break;
3397 case CIPHER_TKIP:
3398 default:
3399 cipher = WLAN_CIPHER_SUITE_TKIP;
3400 break;
3401 }
3402 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3403 }
3404
3405 if (params->group_suite != CIPHER_NONE) {
3406 int cipher;
3407
3408 switch (params->group_suite) {
3409 case CIPHER_WEP40:
3410 cipher = WLAN_CIPHER_SUITE_WEP40;
3411 break;
3412 case CIPHER_WEP104:
3413 cipher = WLAN_CIPHER_SUITE_WEP104;
3414 break;
3415 case CIPHER_CCMP:
3416 cipher = WLAN_CIPHER_SUITE_CCMP;
3417 break;
3418 case CIPHER_TKIP:
3419 default:
3420 cipher = WLAN_CIPHER_SUITE_TKIP;
3421 break;
3422 }
3423 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3424 }
3425
3426 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3427 params->key_mgmt_suite == KEY_MGMT_PSK) {
3428 int mgmt = WLAN_AKM_SUITE_PSK;
3429
3430 switch (params->key_mgmt_suite) {
3431 case KEY_MGMT_802_1X:
3432 mgmt = WLAN_AKM_SUITE_8021X;
3433 break;
3434 case KEY_MGMT_PSK:
3435 default:
3436 mgmt = WLAN_AKM_SUITE_PSK;
3437 break;
3438 }
3439 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3440 }
3441
3442 ret = nl80211_set_conn_keys(params, msg);
3443 if (ret)
3444 goto nla_put_failure;
3445
3446 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3447 msg = NULL;
3448 if (ret) {
3449 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3450 "(%s)", ret, strerror(-ret));
3451 goto nla_put_failure;
3452 }
3453 ret = 0;
3454 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3455
3456 nla_put_failure:
3457 nlmsg_free(msg);
3458 return ret;
3459
3460 }
3461
3462
3463 static int wpa_driver_nl80211_associate(
3464 void *priv, struct wpa_driver_associate_params *params)
3465 {
3466 struct wpa_driver_nl80211_data *drv = priv;
3467 int ret = -1;
3468 struct nl_msg *msg;
3469
3470 if (params->mode == IEEE80211_MODE_AP)
3471 return wpa_driver_nl80211_ap(drv, params);
3472
3473 if (params->mode == IEEE80211_MODE_IBSS)
3474 return wpa_driver_nl80211_ibss(drv, params);
3475
3476 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3477 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3478 return -1;
3479 return wpa_driver_nl80211_connect(drv, params);
3480 }
3481
3482 drv->associated = 0;
3483
3484 msg = nlmsg_alloc();
3485 if (!msg)
3486 return -1;
3487
3488 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3489 drv->ifindex);
3490 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3491 NL80211_CMD_ASSOCIATE, 0);
3492
3493 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3494 if (params->bssid) {
3495 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3496 MAC2STR(params->bssid));
3497 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3498 }
3499 if (params->freq) {
3500 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3501 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3502 drv->assoc_freq = params->freq;
3503 } else
3504 drv->assoc_freq = 0;
3505 if (params->ssid) {
3506 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3507 params->ssid, params->ssid_len);
3508 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3509 params->ssid);
3510 if (params->ssid_len > sizeof(drv->ssid))
3511 goto nla_put_failure;
3512 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3513 drv->ssid_len = params->ssid_len;
3514 }
3515 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3516 if (params->wpa_ie)
3517 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3518 params->wpa_ie);
3519
3520 #ifdef CONFIG_IEEE80211W
3521 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3522 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3523 #endif /* CONFIG_IEEE80211W */
3524
3525 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3526
3527 if (params->prev_bssid) {
3528 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
3529 MAC2STR(params->prev_bssid));
3530 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3531 params->prev_bssid);
3532 }
3533
3534 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3535 msg = NULL;
3536 if (ret) {
3537 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3538 "(%s)", ret, strerror(-ret));
3539 goto nla_put_failure;
3540 }
3541 ret = 0;
3542 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3543 "successfully");
3544
3545 nla_put_failure:
3546 nlmsg_free(msg);
3547 return ret;
3548 }
3549
3550
3551 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3552 int ifindex, int mode)
3553 {
3554 struct nl_msg *msg;
3555 int ret = -ENOBUFS;
3556
3557 msg = nlmsg_alloc();
3558 if (!msg)
3559 return -ENOMEM;
3560
3561 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3562 0, NL80211_CMD_SET_INTERFACE, 0);
3563 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3564 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3565
3566 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3567 if (!ret)
3568 return 0;
3569 nla_put_failure:
3570 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3571 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3572 return ret;
3573 }
3574
3575
3576 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3577 {
3578 struct wpa_driver_nl80211_data *drv = priv;
3579 int ret = -1;
3580 int nlmode;
3581
3582 switch (mode) {
3583 case 0:
3584 nlmode = NL80211_IFTYPE_STATION;
3585 break;
3586 case 1:
3587 nlmode = NL80211_IFTYPE_ADHOC;
3588 break;
3589 case 2:
3590 nlmode = NL80211_IFTYPE_AP;
3591 break;
3592 default:
3593 return -1;
3594 }
3595
3596 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3597 drv->nlmode = nlmode;
3598 ret = 0;
3599 goto done;
3600 }
3601
3602 if (nlmode == drv->nlmode) {
3603 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3604 "requested mode - ignore error");
3605 ret = 0;
3606 goto done; /* Already in the requested mode */
3607 }
3608
3609 /* mac80211 doesn't allow mode changes while the device is up, so
3610 * take the device down, try to set the mode again, and bring the
3611 * device back up.
3612 */
3613 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
3614 /* Try to set the mode again while the interface is down */
3615 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3616 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1))
3617 ret = -1;
3618 }
3619
3620 if (!ret) {
3621 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3622 "interface is down");
3623 drv->nlmode = nlmode;
3624 }
3625
3626 done:
3627 if (!ret && nlmode == NL80211_IFTYPE_AP) {
3628 /* Setup additional AP mode functionality if needed */
3629 if (drv->monitor_ifidx < 0 &&
3630 nl80211_create_monitor_interface(drv))
3631 return -1;
3632 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3633 /* Remove additional AP mode functionality */
3634 nl80211_remove_monitor_interface(drv);
3635 }
3636
3637 if (ret)
3638 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3639 "from %d failed", nlmode, drv->nlmode);
3640
3641 return ret;
3642 }
3643
3644
3645 static int wpa_driver_nl80211_get_capa(void *priv,
3646 struct wpa_driver_capa *capa)
3647 {
3648 struct wpa_driver_nl80211_data *drv = priv;
3649 if (!drv->has_capability)
3650 return -1;
3651 os_memcpy(capa, &drv->capa, sizeof(*capa));
3652 return 0;
3653 }
3654
3655
3656 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3657 {
3658 struct wpa_driver_nl80211_data *drv = priv;
3659
3660 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3661 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3662 drv->operstate = state;
3663 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3664 state ? IF_OPER_UP : IF_OPER_DORMANT);
3665 }
3666
3667
3668 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3669 {
3670 struct wpa_driver_nl80211_data *drv = priv;
3671 struct nl_msg *msg;
3672 struct nl80211_sta_flag_update upd;
3673
3674 msg = nlmsg_alloc();
3675 if (!msg)
3676 return -ENOMEM;
3677
3678 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3679 0, NL80211_CMD_SET_STATION, 0);
3680
3681 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3682 if_nametoindex(drv->ifname));
3683 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3684
3685 os_memset(&upd, 0, sizeof(upd));
3686 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3687 if (authorized)
3688 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3689 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3690
3691 return send_and_recv_msgs(drv, msg, NULL, NULL);
3692 nla_put_failure:
3693 return -ENOBUFS;
3694 }
3695
3696
3697 #ifdef HOSTAPD
3698
3699 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3700 int ifindex)
3701 {
3702 struct i802_bss *bss = &drv->bss;
3703 while (bss) {
3704 if (ifindex == bss->ifindex)
3705 return bss;
3706 bss = bss->next;
3707 }
3708 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3709 return NULL;
3710 }
3711
3712
3713 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3714 {
3715 int i;
3716 int *old;
3717
3718 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3719 ifidx);
3720 for (i = 0; i < drv->num_if_indices; i++) {
3721 if (drv->if_indices[i] == 0) {
3722 drv->if_indices[i] = ifidx;
3723 return;
3724 }
3725 }
3726
3727 if (drv->if_indices != drv->default_if_indices)
3728 old = drv->if_indices;
3729 else
3730 old = NULL;
3731
3732 drv->if_indices = os_realloc(old,
3733 sizeof(int) * (drv->num_if_indices + 1));
3734 if (!drv->if_indices) {
3735 if (!old)
3736 drv->if_indices = drv->default_if_indices;
3737 else
3738 drv->if_indices = old;
3739 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3740 "interfaces");
3741 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3742 return;
3743 }
3744 drv->if_indices[drv->num_if_indices] = ifidx;
3745 drv->num_if_indices++;
3746 }
3747
3748
3749 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3750 {
3751 int i;
3752
3753 for (i = 0; i < drv->num_if_indices; i++) {
3754 if (drv->if_indices[i] == ifidx) {
3755 drv->if_indices[i] = 0;
3756 break;
3757 }
3758 }
3759 }
3760
3761
3762 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3763 {
3764 int i;
3765
3766 for (i = 0; i < drv->num_if_indices; i++)
3767 if (drv->if_indices[i] == ifidx)
3768 return 1;
3769
3770 return 0;
3771 }
3772
3773
3774 static inline int min_int(int a, int b)
3775 {
3776 if (a < b)
3777 return a;
3778 return b;
3779 }
3780
3781
3782 static int get_key_handler(struct nl_msg *msg, void *arg)
3783 {
3784 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3785 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3786
3787 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3788 genlmsg_attrlen(gnlh, 0), NULL);
3789
3790 /*
3791 * TODO: validate the key index and mac address!
3792 * Otherwise, there's a race condition as soon as
3793 * the kernel starts sending key notifications.
3794 */
3795
3796 if (tb[NL80211_ATTR_KEY_SEQ])
3797 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3798 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3799 return NL_SKIP;
3800 }
3801
3802
3803 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3804 int idx, u8 *seq)
3805 {
3806 struct wpa_driver_nl80211_data *drv = priv;
3807 struct nl_msg *msg;
3808
3809 msg = nlmsg_alloc();
3810 if (!msg)
3811 return -ENOMEM;
3812
3813 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3814 0, NL80211_CMD_GET_KEY, 0);
3815
3816 if (addr)
3817 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3818 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3819 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3820
3821 memset(seq, 0, 6);
3822
3823 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3824 nla_put_failure:
3825 return -ENOBUFS;
3826 }
3827
3828
3829 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3830 int mode)
3831 {
3832 struct wpa_driver_nl80211_data *drv = priv;
3833 struct nl_msg *msg;
3834 u8 rates[NL80211_MAX_SUPP_RATES];
3835 u8 rates_len = 0;
3836 int i;
3837
3838 msg = nlmsg_alloc();
3839 if (!msg)
3840 return -ENOMEM;
3841
3842 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3843 NL80211_CMD_SET_BSS, 0);
3844
3845 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3846 rates[rates_len++] = basic_rates[i] / 5;
3847
3848 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3849
3850 /* TODO: multi-BSS support */
3851 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3852
3853 return send_and_recv_msgs(drv, msg, NULL, NULL);
3854 nla_put_failure:
3855 return -ENOBUFS;
3856 }
3857
3858
3859 /* Set kernel driver on given frequency (MHz) */
3860 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3861 {
3862 struct wpa_driver_nl80211_data *drv = priv;
3863 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3864 freq->sec_channel_offset);
3865 }
3866
3867
3868 static int i802_set_rts(void *priv, int rts)
3869 {
3870 struct wpa_driver_nl80211_data *drv = priv;
3871 struct nl_msg *msg;
3872 int ret = -ENOBUFS;
3873 u32 val;
3874
3875 msg = nlmsg_alloc();
3876 if (!msg)
3877 return -ENOMEM;
3878
3879 if (rts >= 2347)
3880 val = (u32) -1;
3881 else
3882 val = rts;
3883
3884 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3885 0, NL80211_CMD_SET_WIPHY, 0);
3886 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3887 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3888
3889 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3890 if (!ret)
3891 return 0;
3892 nla_put_failure:
3893 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3894 "%d (%s)", rts, ret, strerror(-ret));
3895 return ret;
3896 }
3897
3898
3899 static int i802_set_frag(void *priv, int frag)
3900 {
3901 struct wpa_driver_nl80211_data *drv = priv;
3902 struct nl_msg *msg;
3903 int ret = -ENOBUFS;
3904 u32 val;
3905
3906 msg = nlmsg_alloc();
3907 if (!msg)
3908 return -ENOMEM;
3909
3910 if (frag >= 2346)
3911 val = (u32) -1;
3912 else
3913 val = frag;
3914
3915 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3916 0, NL80211_CMD_SET_WIPHY, 0);
3917 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3918 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3919
3920 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3921 if (!ret)
3922 return 0;
3923 nla_put_failure:
3924 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3925 "%d: %d (%s)", frag, ret, strerror(-ret));
3926 return ret;
3927 }
3928
3929
3930 static int i802_flush(void *priv)
3931 {
3932 struct wpa_driver_nl80211_data *drv = priv;
3933 struct nl_msg *msg;
3934
3935 msg = nlmsg_alloc();
3936 if (!msg)
3937 return -1;
3938
3939 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3940 0, NL80211_CMD_DEL_STATION, 0);
3941
3942 /*
3943 * XXX: FIX! this needs to flush all VLANs too
3944 */
3945 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3946 if_nametoindex(drv->ifname));
3947
3948 return send_and_recv_msgs(drv, msg, NULL, NULL);
3949 nla_put_failure:
3950 return -ENOBUFS;
3951 }
3952
3953
3954 static int get_sta_handler(struct nl_msg *msg, void *arg)
3955 {
3956 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3957 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3958 struct hostap_sta_driver_data *data = arg;
3959 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3960 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3961 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3962 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3963 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3964 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3965 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3966 };
3967
3968 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3969 genlmsg_attrlen(gnlh, 0), NULL);
3970
3971 /*
3972 * TODO: validate the interface and mac address!
3973 * Otherwise, there's a race condition as soon as
3974 * the kernel starts sending station notifications.
3975 */
3976
3977 if (!tb[NL80211_ATTR_STA_INFO]) {
3978 wpa_printf(MSG_DEBUG, "sta stats missing!");
3979 return NL_SKIP;
3980 }
3981 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3982 tb[NL80211_ATTR_STA_INFO],
3983 stats_policy)) {
3984 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3985 return NL_SKIP;
3986 }
3987
3988 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3989 data->inactive_msec =
3990 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3991 if (stats[NL80211_STA_INFO_RX_BYTES])
3992 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3993 if (stats[NL80211_STA_INFO_TX_BYTES])
3994 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3995 if (stats[NL80211_STA_INFO_RX_PACKETS])
3996 data->rx_packets =
3997 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3998 if (stats[NL80211_STA_INFO_TX_PACKETS])
3999 data->tx_packets =
4000 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4001
4002 return NL_SKIP;
4003 }
4004
4005 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4006 const u8 *addr)
4007 {
4008 struct wpa_driver_nl80211_data *drv = priv;
4009 struct nl_msg *msg;
4010
4011 os_memset(data, 0, sizeof(*data));
4012 msg = nlmsg_alloc();
4013 if (!msg)
4014 return -ENOMEM;
4015
4016 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4017 0, NL80211_CMD_GET_STATION, 0);
4018
4019 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4020 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4021
4022 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4023 nla_put_failure:
4024 return -ENOBUFS;
4025 }
4026
4027
4028 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4029 int cw_min, int cw_max, int burst_time)
4030 {
4031 struct wpa_driver_nl80211_data *drv = priv;
4032 struct nl_msg *msg;
4033 struct nlattr *txq, *params;
4034
4035 msg = nlmsg_alloc();
4036 if (!msg)
4037 return -1;
4038
4039 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4040 0, NL80211_CMD_SET_WIPHY, 0);
4041
4042 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4043
4044 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4045 if (!txq)
4046 goto nla_put_failure;
4047
4048 /* We are only sending parameters for a single TXQ at a time */
4049 params = nla_nest_start(msg, 1);
4050 if (!params)
4051 goto nla_put_failure;
4052
4053 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4054 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4055 * 32 usec, so need to convert the value here. */
4056 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4057 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4058 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4059 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4060
4061 nla_nest_end(msg, params);
4062
4063 nla_nest_end(msg, txq);
4064
4065 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4066 return 0;
4067 nla_put_failure:
4068 return -1;
4069 }
4070
4071
4072 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4073 {
4074 struct wpa_driver_nl80211_data *drv = priv;
4075 struct nl_msg *msg;
4076
4077 msg = nlmsg_alloc();
4078 if (!msg)
4079 return -ENOMEM;
4080
4081 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4082 NL80211_CMD_SET_BSS, 0);
4083
4084 if (cts >= 0)
4085 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4086 if (preamble >= 0)
4087 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4088 if (slot >= 0)
4089 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4090
4091 /* TODO: multi-BSS support */
4092 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4093
4094 return send_and_recv_msgs(drv, msg, NULL, NULL);
4095 nla_put_failure:
4096 return -ENOBUFS;
4097 }
4098
4099
4100 static int i802_set_cts_protect(void *priv, int value)
4101 {
4102 return i802_set_bss(priv, value, -1, -1);
4103 }
4104
4105
4106 static int i802_set_preamble(void *priv, int value)
4107 {
4108 return i802_set_bss(priv, -1, value, -1);
4109 }
4110
4111
4112 static int i802_set_short_slot_time(void *priv, int value)
4113 {
4114 return i802_set_bss(priv, -1, -1, value);
4115 }
4116
4117
4118 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4119 const char *ifname, int vlan_id)
4120 {
4121 struct wpa_driver_nl80211_data *drv = priv;
4122 struct nl_msg *msg;
4123
4124 msg = nlmsg_alloc();
4125 if (!msg)
4126 return -ENOMEM;
4127
4128 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4129 0, NL80211_CMD_SET_STATION, 0);
4130
4131 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4132 if_nametoindex(drv->ifname));
4133 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4134 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4135 if_nametoindex(ifname));
4136
4137 return send_and_recv_msgs(drv, msg, NULL, NULL);
4138 nla_put_failure:
4139 return -ENOBUFS;
4140 }
4141
4142
4143 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4144 {
4145 struct wpa_driver_nl80211_data *drv = priv;
4146 char name[16];
4147
4148 os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4149 if (val) {
4150 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4151 NULL, 1) < 0)
4152 return -1;
4153 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4154 return i802_set_sta_vlan(priv, addr, name, 0);
4155 } else {
4156 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4157 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4158 name);
4159 }
4160 }
4161
4162
4163 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4164 {
4165 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4166 struct sockaddr_ll lladdr;
4167 unsigned char buf[3000];
4168 int len;
4169 socklen_t fromlen = sizeof(lladdr);
4170
4171 len = recvfrom(sock, buf, sizeof(buf), 0,
4172 (struct sockaddr *)&lladdr, &fromlen);
4173 if (len < 0) {
4174 perror("recv");
4175 return;
4176 }
4177
4178 if (have_ifidx(drv, lladdr.sll_ifindex))
4179 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4180 }
4181
4182
4183 static int i802_get_inact_sec(void *priv, const u8 *addr)
4184 {
4185 struct hostap_sta_driver_data data;
4186 int ret;
4187
4188 data.inactive_msec = (unsigned long) -1;
4189 ret = i802_read_sta_data(priv, &data, addr);
4190 if (ret || data.inactive_msec == (unsigned long) -1)
4191 return -1;
4192 return data.inactive_msec / 1000;
4193 }
4194
4195
4196 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4197 {
4198 #if 0
4199 /* TODO */
4200 #endif
4201 return 0;
4202 }
4203
4204
4205 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4206 int reason)
4207 {
4208 struct wpa_driver_nl80211_data *drv = priv;
4209 struct ieee80211_mgmt mgmt;
4210
4211 memset(&mgmt, 0, sizeof(mgmt));
4212 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4213 WLAN_FC_STYPE_DEAUTH);
4214 memcpy(mgmt.da, addr, ETH_ALEN);
4215 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4216 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4217 mgmt.u.deauth.reason_code = host_to_le16(reason);
4218 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4219 IEEE80211_HDRLEN +
4220 sizeof(mgmt.u.deauth));
4221 }
4222
4223
4224 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4225 int reason)
4226 {
4227 struct wpa_driver_nl80211_data *drv = priv;
4228 struct ieee80211_mgmt mgmt;
4229
4230 memset(&mgmt, 0, sizeof(mgmt));
4231 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4232 WLAN_FC_STYPE_DISASSOC);
4233 memcpy(mgmt.da, addr, ETH_ALEN);
4234 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4235 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4236 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4237 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4238 IEEE80211_HDRLEN +
4239 sizeof(mgmt.u.disassoc));
4240 }
4241
4242
4243 static void *i802_init(struct hostapd_data *hapd,
4244 struct wpa_init_params *params)
4245 {
4246 struct wpa_driver_nl80211_data *drv;
4247 size_t i;
4248
4249 drv = wpa_driver_nl80211_init(hapd, params->ifname);
4250 if (drv == NULL)
4251 return NULL;
4252
4253 drv->bss.ifindex = drv->ifindex;
4254
4255 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4256 drv->if_indices = drv->default_if_indices;
4257 for (i = 0; i < params->num_bridge; i++) {
4258 if (params->bridge[i])
4259 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4260 }
4261
4262 /* start listening for EAPOL on the default AP interface */
4263 add_ifidx(drv, drv->ifindex);
4264
4265 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0))
4266 goto failed;
4267
4268 if (params->bssid) {
4269 if (linux_set_ifhwaddr(drv->ioctl_sock, drv->ifname,
4270 params->bssid))
4271 goto failed;
4272 }
4273
4274 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4275 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4276 "into AP mode", drv->ifname);
4277 goto failed;
4278 }
4279
4280 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1))
4281 goto failed;
4282
4283 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4284 if (drv->eapol_sock < 0) {
4285 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4286 goto failed;
4287 }
4288
4289 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4290 {
4291 printf("Could not register read socket for eapol\n");
4292 goto failed;
4293 }
4294
4295 if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, params->own_addr))
4296 goto failed;
4297
4298 return drv;
4299
4300 failed:
4301 nl80211_remove_monitor_interface(drv);
4302 if (drv->ioctl_sock >= 0)
4303 close(drv->ioctl_sock);
4304
4305 genl_family_put(drv->nl80211);
4306 nl_cache_free(drv->nl_cache);
4307 nl_handle_destroy(drv->nl_handle);
4308 nl_cb_put(drv->nl_cb);
4309
4310 os_free(drv);
4311 return NULL;
4312 }
4313
4314
4315 static void i802_deinit(void *priv)
4316 {
4317 wpa_driver_nl80211_deinit(priv);
4318 }
4319
4320 #endif /* HOSTAPD */
4321
4322
4323 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4324 enum wpa_driver_if_type type)
4325 {
4326 switch (type) {
4327 case WPA_IF_STATION:
4328 return NL80211_IFTYPE_STATION;
4329 case WPA_IF_AP_VLAN:
4330 return NL80211_IFTYPE_AP_VLAN;
4331 case WPA_IF_AP_BSS:
4332 return NL80211_IFTYPE_AP;
4333 }
4334 return -1;
4335 }
4336
4337
4338 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4339 enum wpa_driver_if_type type,
4340 const char *ifname, const u8 *addr,
4341 void *bss_ctx)
4342 {
4343 struct wpa_driver_nl80211_data *drv = priv;
4344 int ifidx;
4345 #ifdef HOSTAPD
4346 struct i802_bss *bss = NULL;
4347
4348 if (type == WPA_IF_AP_BSS) {
4349 bss = os_zalloc(sizeof(*bss));
4350 if (bss == NULL)
4351 return -1;
4352 }
4353 #endif /* HOSTAPD */
4354
4355 ifidx = nl80211_create_iface(drv, ifname,
4356 wpa_driver_nl80211_if_type(type), addr,
4357 0);
4358 if (ifidx < 0) {
4359 #ifdef HOSTAPD
4360 os_free(bss);
4361 #endif /* HOSTAPD */
4362 return -1;
4363 }
4364
4365 #ifdef HOSTAPD
4366 if (type == WPA_IF_AP_BSS) {
4367 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4368 nl80211_remove_iface(drv, ifidx);
4369 os_free(bss);
4370 return -1;
4371 }
4372 bss->ifindex = ifidx;
4373 bss->next = drv->bss.next;
4374 drv->bss.next = bss;
4375 }
4376 #endif /* HOSTAPD */
4377
4378 return 0;
4379 }
4380
4381
4382 static int wpa_driver_nl80211_if_remove(void *priv,
4383 enum wpa_driver_if_type type,
4384 const char *ifname)
4385 {
4386 struct wpa_driver_nl80211_data *drv = priv;
4387 int ifindex = if_nametoindex(ifname);
4388
4389 nl80211_remove_iface(drv, ifindex);
4390
4391 #ifdef HOSTAPD
4392 if (type == WPA_IF_AP_BSS) {
4393 struct i802_bss *bss, *prev;
4394 prev = &drv->bss;
4395 bss = drv->bss.next;
4396 while (bss) {
4397 if (ifindex == bss->ifindex) {
4398 prev->next = bss->next;
4399 os_free(bss);
4400 break;
4401 }
4402 prev = bss;
4403 bss = bss->next;
4404 }
4405 }
4406 #endif /* HOSTAPD */
4407
4408 return 0;
4409 }
4410
4411
4412 static int cookie_handler(struct nl_msg *msg, void *arg)
4413 {
4414 struct nlattr *tb[NL80211_ATTR_MAX + 1];
4415 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4416 u64 *cookie = arg;
4417 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4418 genlmsg_attrlen(gnlh, 0), NULL);
4419 if (tb[NL80211_ATTR_COOKIE])
4420 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4421 return NL_SKIP;
4422 }
4423
4424
4425 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
4426 unsigned int duration)
4427 {
4428 struct wpa_driver_nl80211_data *drv = priv;
4429 struct nl_msg *msg;
4430 int ret;
4431 u64 cookie;
4432
4433 msg = nlmsg_alloc();
4434 if (!msg)
4435 return -1;
4436
4437 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4438 NL80211_CMD_REMAIN_ON_CHANNEL, 0);
4439
4440 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4441 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4442 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
4443
4444 cookie = 0;
4445 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4446 if (ret == 0) {
4447 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
4448 "0x%llx for freq=%u MHz duration=%u",
4449 (long long unsigned int) cookie, freq, duration);
4450 drv->remain_on_chan_cookie = cookie;
4451 return 0;
4452 }
4453 wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
4454 "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
4455 nla_put_failure:
4456 return -1;
4457 }
4458
4459
4460 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
4461 {
4462 struct wpa_driver_nl80211_data *drv = priv;
4463 struct nl_msg *msg;
4464 int ret;
4465
4466 if (!drv->pending_remain_on_chan) {
4467 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
4468 "to cancel");
4469 return -1;
4470 }
4471
4472 wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
4473 "0x%llx",
4474 (long long unsigned int) drv->remain_on_chan_cookie);
4475
4476 msg = nlmsg_alloc();
4477 if (!msg)
4478 return -1;
4479
4480 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4481 NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
4482
4483 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4484 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
4485
4486 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4487 if (ret == 0)
4488 return 0;
4489 wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
4490 "%d (%s)", ret, strerror(-ret));
4491 nla_put_failure:
4492 return -1;
4493 }
4494
4495
4496 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
4497 void *timeout_ctx)
4498 {
4499 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4500 if (drv->monitor_ifidx < 0)
4501 return; /* monitor interface already removed */
4502
4503 if (drv->nlmode != NL80211_IFTYPE_STATION)
4504 return; /* not in station mode anymore */
4505
4506 if (drv->probe_req_report)
4507 return; /* reporting enabled */
4508
4509 wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
4510 "Probe Request reporting needed anymore");
4511 nl80211_remove_monitor_interface(drv);
4512 }
4513
4514
4515 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
4516 {
4517 struct wpa_driver_nl80211_data *drv = priv;
4518
4519 if (drv->nlmode != NL80211_IFTYPE_STATION) {
4520 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
4521 "allowed in station mode (iftype=%d)",
4522 drv->nlmode);
4523 return -1;
4524 }
4525 drv->probe_req_report = report;
4526
4527 if (report) {
4528 eloop_cancel_timeout(
4529 wpa_driver_nl80211_probe_req_report_timeout,
4530 drv, NULL);
4531 if (drv->monitor_ifidx < 0 &&
4532 nl80211_create_monitor_interface(drv))
4533 return -1;
4534 } else {
4535 /*
4536 * It takes a while to remove the monitor interface, so try to
4537 * avoid doing this if it is needed again shortly. Instead,
4538 * schedule the interface to be removed later if no need for it
4539 * is seen.
4540 */
4541 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
4542 "to be removed after 10 seconds of no use");
4543 eloop_register_timeout(
4544 10, 0, wpa_driver_nl80211_probe_req_report_timeout,
4545 drv, NULL);
4546 }
4547
4548 return 0;
4549 }
4550
4551
4552 static int wpa_driver_nl80211_alloc_interface_addr(void *priv, u8 *addr)
4553 {
4554 struct wpa_driver_nl80211_data *drv = priv;
4555
4556 if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr) < 0)
4557 return -1;
4558
4559 if (addr[0] & 0x02) {
4560 /* TODO: add support for generating multiple addresses */
4561 addr[0] ^= 0x80;
4562 } else
4563 addr[0] = 0x02; /* locally administered */
4564
4565 return 0;
4566 }
4567
4568
4569 static void wpa_driver_nl80211_release_interface_addr(void *priv,
4570 const u8 *addr)
4571 {
4572 /* TODO: keep list of allocated address and release them here */
4573 }
4574
4575
4576 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
4577 int ifindex, int disabled)
4578 {
4579 struct nl_msg *msg;
4580 struct nlattr *bands, *band;
4581 int ret;
4582
4583 msg = nlmsg_alloc();
4584 if (!msg)
4585 return -1;
4586
4587 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4588 NL80211_CMD_SET_TX_BITRATE_MASK, 0);
4589 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4590
4591 bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
4592 if (!bands)
4593 goto nla_put_failure;
4594
4595 /*
4596 * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
4597 * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
4598 * rates. All 5 GHz rates are left enabled.
4599 */
4600 band = nla_nest_start(msg, NL80211_BAND_2GHZ);
4601 if (!band)
4602 goto nla_put_failure;
4603 NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
4604 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
4605 nla_nest_end(msg, band);
4606
4607 nla_nest_end(msg, bands);
4608
4609 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4610 msg = NULL;
4611 if (ret) {
4612 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
4613 "(%s)", ret, strerror(-ret));
4614 }
4615
4616 return ret;
4617
4618 nla_put_failure:
4619 nlmsg_free(msg);
4620 return -1;
4621 }
4622
4623
4624 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
4625 {
4626 struct wpa_driver_nl80211_data *drv = priv;
4627 drv->disable_11b_rates = disabled;
4628 return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
4629 }
4630
4631
4632 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4633 .name = "nl80211",
4634 .desc = "Linux nl80211/cfg80211",
4635 .get_bssid = wpa_driver_nl80211_get_bssid,
4636 .get_ssid = wpa_driver_nl80211_get_ssid,
4637 .set_key = wpa_driver_nl80211_set_key,
4638 .scan2 = wpa_driver_nl80211_scan,
4639 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4640 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4641 .disassociate = wpa_driver_nl80211_disassociate,
4642 .authenticate = wpa_driver_nl80211_authenticate,
4643 .associate = wpa_driver_nl80211_associate,
4644 .init = wpa_driver_nl80211_init,
4645 .deinit = wpa_driver_nl80211_deinit,
4646 .get_capa = wpa_driver_nl80211_get_capa,
4647 .set_operstate = wpa_driver_nl80211_set_operstate,
4648 .set_supp_port = wpa_driver_nl80211_set_supp_port,
4649 .set_country = wpa_driver_nl80211_set_country,
4650 .set_beacon = wpa_driver_nl80211_set_beacon,
4651 .if_add = wpa_driver_nl80211_if_add,
4652 .if_remove = wpa_driver_nl80211_if_remove,
4653 .send_mlme = wpa_driver_nl80211_send_mlme,
4654 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4655 .sta_add = wpa_driver_nl80211_sta_add,
4656 .sta_remove = wpa_driver_nl80211_sta_remove,
4657 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4658 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4659 #ifdef HOSTAPD
4660 .hapd_init = i802_init,
4661 .hapd_deinit = i802_deinit,
4662 .get_seqnum = i802_get_seqnum,
4663 .flush = i802_flush,
4664 .read_sta_data = i802_read_sta_data,
4665 .sta_deauth = i802_sta_deauth,
4666 .sta_disassoc = i802_sta_disassoc,
4667 .get_inact_sec = i802_get_inact_sec,
4668 .sta_clear_stats = i802_sta_clear_stats,
4669 .set_freq = i802_set_freq,
4670 .set_rts = i802_set_rts,
4671 .set_frag = i802_set_frag,
4672 .set_rate_sets = i802_set_rate_sets,
4673 .set_cts_protect = i802_set_cts_protect,
4674 .set_preamble = i802_set_preamble,
4675 .set_short_slot_time = i802_set_short_slot_time,
4676 .set_tx_queue_params = i802_set_tx_queue_params,
4677 .set_sta_vlan = i802_set_sta_vlan,
4678 .set_wds_sta = i802_set_wds_sta,
4679 #endif /* HOSTAPD */
4680 .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
4681 .cancel_remain_on_channel =
4682 wpa_driver_nl80211_cancel_remain_on_channel,
4683 .probe_req_report = wpa_driver_nl80211_probe_req_report,
4684 .alloc_interface_addr = wpa_driver_nl80211_alloc_interface_addr,
4685 .release_interface_addr = wpa_driver_nl80211_release_interface_addr,
4686 .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
4687 };
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