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Add BSSID and reason code (if available) to disconnect event
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009-2010, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <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 wpa_driver_nl80211_data *drv;
62 struct i802_bss *next;
63 int ifindex;
64 char ifname[IFNAMSIZ + 1];
65 unsigned int beacon_set:1;
66 };
67
68 struct wpa_driver_nl80211_data {
69 void *ctx;
70 struct netlink_data *netlink;
71 int ioctl_sock; /* socket for ioctl() use */
72 char brname[IFNAMSIZ];
73 int ifindex;
74 int if_removed;
75 struct wpa_driver_capa capa;
76 int has_capability;
77
78 int operstate;
79
80 int scan_complete_events;
81
82 struct nl_handle *nl_handle;
83 struct nl_handle *nl_handle_event;
84 struct nl_cache *nl_cache;
85 struct nl_cache *nl_cache_event;
86 struct nl_cb *nl_cb;
87 struct genl_family *nl80211;
88
89 u8 auth_bssid[ETH_ALEN];
90 u8 bssid[ETH_ALEN];
91 int associated;
92 u8 ssid[32];
93 size_t ssid_len;
94 int nlmode;
95 int ap_scan_as_station;
96 unsigned int assoc_freq;
97
98 int monitor_sock;
99 int monitor_ifidx;
100 int probe_req_report;
101 int disable_11b_rates;
102
103 unsigned int pending_remain_on_chan:1;
104 unsigned int pending_send_action:1;
105 unsigned int added_bridge:1;
106 unsigned int added_if_into_bridge:1;
107
108 u64 remain_on_chan_cookie;
109 u64 send_action_cookie;
110
111 struct wpa_driver_scan_filter *filter_ssids;
112 size_t num_filter_ssids;
113
114 struct i802_bss first_bss;
115
116 #ifdef HOSTAPD
117 int eapol_sock; /* socket for EAPOL frames */
118
119 int default_if_indices[16];
120 int *if_indices;
121 int num_if_indices;
122
123 int last_freq;
124 int last_freq_ht;
125 #endif /* HOSTAPD */
126 };
127
128
129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
130 void *timeout_ctx);
131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
132 static int
133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
134 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
135 const u8 *addr, int cmd, u16 reason_code,
136 int local_state_change);
137 static void nl80211_remove_monitor_interface(
138 struct wpa_driver_nl80211_data *drv);
139
140 #ifdef HOSTAPD
141 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
142 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
143 static int wpa_driver_nl80211_if_remove(void *priv,
144 enum wpa_driver_if_type type,
145 const char *ifname);
146 #endif /* HOSTAPD */
147
148 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
149 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
150 void *timeout_ctx);
151 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
152 int ifindex, int disabled);
153
154
155 /* nl80211 code */
156 static int ack_handler(struct nl_msg *msg, void *arg)
157 {
158 int *err = arg;
159 *err = 0;
160 return NL_STOP;
161 }
162
163 static int finish_handler(struct nl_msg *msg, void *arg)
164 {
165 int *ret = arg;
166 *ret = 0;
167 return NL_SKIP;
168 }
169
170 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
171 void *arg)
172 {
173 int *ret = arg;
174 *ret = err->error;
175 return NL_SKIP;
176 }
177
178
179 static int no_seq_check(struct nl_msg *msg, void *arg)
180 {
181 return NL_OK;
182 }
183
184
185 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
186 struct nl_handle *nl_handle, struct nl_msg *msg,
187 int (*valid_handler)(struct nl_msg *, void *),
188 void *valid_data)
189 {
190 struct nl_cb *cb;
191 int err = -ENOMEM;
192
193 cb = nl_cb_clone(drv->nl_cb);
194 if (!cb)
195 goto out;
196
197 err = nl_send_auto_complete(nl_handle, msg);
198 if (err < 0)
199 goto out;
200
201 err = 1;
202
203 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
204 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
205 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
206
207 if (valid_handler)
208 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
209 valid_handler, valid_data);
210
211 while (err > 0)
212 nl_recvmsgs(nl_handle, cb);
213 out:
214 nl_cb_put(cb);
215 nlmsg_free(msg);
216 return err;
217 }
218
219
220 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
221 struct nl_msg *msg,
222 int (*valid_handler)(struct nl_msg *, void *),
223 void *valid_data)
224 {
225 return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
226 valid_data);
227 }
228
229
230 struct family_data {
231 const char *group;
232 int id;
233 };
234
235
236 static int family_handler(struct nl_msg *msg, void *arg)
237 {
238 struct family_data *res = arg;
239 struct nlattr *tb[CTRL_ATTR_MAX + 1];
240 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
241 struct nlattr *mcgrp;
242 int i;
243
244 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
245 genlmsg_attrlen(gnlh, 0), NULL);
246 if (!tb[CTRL_ATTR_MCAST_GROUPS])
247 return NL_SKIP;
248
249 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
250 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
251 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
252 nla_len(mcgrp), NULL);
253 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
254 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
255 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
256 res->group,
257 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
258 continue;
259 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
260 break;
261 };
262
263 return NL_SKIP;
264 }
265
266
267 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
268 const char *family, const char *group)
269 {
270 struct nl_msg *msg;
271 int ret = -1;
272 struct family_data res = { group, -ENOENT };
273
274 msg = nlmsg_alloc();
275 if (!msg)
276 return -ENOMEM;
277 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
278 0, 0, CTRL_CMD_GETFAMILY, 0);
279 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
280
281 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
282 msg = NULL;
283 if (ret == 0)
284 ret = res.id;
285
286 nla_put_failure:
287 nlmsg_free(msg);
288 return ret;
289 }
290
291
292 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
293 {
294 struct i802_bss *bss = priv;
295 struct wpa_driver_nl80211_data *drv = bss->drv;
296 if (!drv->associated)
297 return -1;
298 os_memcpy(bssid, drv->bssid, ETH_ALEN);
299 return 0;
300 }
301
302
303 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
304 {
305 struct i802_bss *bss = priv;
306 struct wpa_driver_nl80211_data *drv = bss->drv;
307 if (!drv->associated)
308 return -1;
309 os_memcpy(ssid, drv->ssid, drv->ssid_len);
310 return drv->ssid_len;
311 }
312
313
314 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
315 char *buf, size_t len, int del)
316 {
317 union wpa_event_data event;
318
319 os_memset(&event, 0, sizeof(event));
320 if (len > sizeof(event.interface_status.ifname))
321 len = sizeof(event.interface_status.ifname) - 1;
322 os_memcpy(event.interface_status.ifname, buf, len);
323 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
324 EVENT_INTERFACE_ADDED;
325
326 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
327 del ? "DEL" : "NEW",
328 event.interface_status.ifname,
329 del ? "removed" : "added");
330
331 if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
332 if (del)
333 drv->if_removed = 1;
334 else
335 drv->if_removed = 0;
336 }
337
338 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
339 }
340
341
342 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
343 u8 *buf, size_t len)
344 {
345 int attrlen, rta_len;
346 struct rtattr *attr;
347
348 attrlen = len;
349 attr = (struct rtattr *) buf;
350
351 rta_len = RTA_ALIGN(sizeof(struct rtattr));
352 while (RTA_OK(attr, attrlen)) {
353 if (attr->rta_type == IFLA_IFNAME) {
354 if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
355 == 0)
356 return 1;
357 else
358 break;
359 }
360 attr = RTA_NEXT(attr, attrlen);
361 }
362
363 return 0;
364 }
365
366
367 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
368 int ifindex, u8 *buf, size_t len)
369 {
370 if (drv->ifindex == ifindex)
371 return 1;
372
373 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
374 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
375 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
376 "interface");
377 wpa_driver_nl80211_finish_drv_init(drv);
378 return 1;
379 }
380
381 return 0;
382 }
383
384
385 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
386 struct ifinfomsg *ifi,
387 u8 *buf, size_t len)
388 {
389 struct wpa_driver_nl80211_data *drv = ctx;
390 int attrlen, rta_len;
391 struct rtattr *attr;
392
393 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
394 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
395 ifi->ifi_index);
396 return;
397 }
398
399 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
400 "(%s%s%s%s)",
401 drv->operstate, ifi->ifi_flags,
402 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
403 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
404 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
405 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
406 /*
407 * Some drivers send the association event before the operup event--in
408 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
409 * fails. This will hit us when wpa_supplicant does not need to do
410 * IEEE 802.1X authentication
411 */
412 if (drv->operstate == 1 &&
413 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
414 !(ifi->ifi_flags & IFF_RUNNING))
415 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
416 -1, IF_OPER_UP);
417
418 attrlen = len;
419 attr = (struct rtattr *) buf;
420 rta_len = RTA_ALIGN(sizeof(struct rtattr));
421 while (RTA_OK(attr, attrlen)) {
422 if (attr->rta_type == IFLA_IFNAME) {
423 wpa_driver_nl80211_event_link(
424 drv,
425 ((char *) attr) + rta_len,
426 attr->rta_len - rta_len, 0);
427 }
428 attr = RTA_NEXT(attr, attrlen);
429 }
430 }
431
432
433 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
434 struct ifinfomsg *ifi,
435 u8 *buf, size_t len)
436 {
437 struct wpa_driver_nl80211_data *drv = ctx;
438 int attrlen, rta_len;
439 struct rtattr *attr;
440
441 attrlen = len;
442 attr = (struct rtattr *) buf;
443
444 rta_len = RTA_ALIGN(sizeof(struct rtattr));
445 while (RTA_OK(attr, attrlen)) {
446 if (attr->rta_type == IFLA_IFNAME) {
447 wpa_driver_nl80211_event_link(
448 drv,
449 ((char *) attr) + rta_len,
450 attr->rta_len - rta_len, 1);
451 }
452 attr = RTA_NEXT(attr, attrlen);
453 }
454 }
455
456
457 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
458 const u8 *frame, size_t len)
459 {
460 const struct ieee80211_mgmt *mgmt;
461 union wpa_event_data event;
462
463 mgmt = (const struct ieee80211_mgmt *) frame;
464 if (len < 24 + sizeof(mgmt->u.auth)) {
465 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
466 "frame");
467 return;
468 }
469
470 os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
471 os_memset(&event, 0, sizeof(event));
472 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
473 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
474 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
475 if (len > 24 + sizeof(mgmt->u.auth)) {
476 event.auth.ies = mgmt->u.auth.variable;
477 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
478 }
479
480 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
481 }
482
483
484 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
485 const u8 *frame, size_t len)
486 {
487 const struct ieee80211_mgmt *mgmt;
488 union wpa_event_data event;
489 u16 status;
490
491 mgmt = (const struct ieee80211_mgmt *) frame;
492 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
493 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
494 "frame");
495 return;
496 }
497
498 status = le_to_host16(mgmt->u.assoc_resp.status_code);
499 if (status != WLAN_STATUS_SUCCESS) {
500 os_memset(&event, 0, sizeof(event));
501 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
502 event.assoc_reject.resp_ies =
503 (u8 *) mgmt->u.assoc_resp.variable;
504 event.assoc_reject.resp_ies_len =
505 len - 24 - sizeof(mgmt->u.assoc_resp);
506 }
507 event.assoc_reject.status_code = status;
508
509 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
510 return;
511 }
512
513 drv->associated = 1;
514 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
515
516 os_memset(&event, 0, sizeof(event));
517 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
518 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
519 event.assoc_info.resp_ies_len =
520 len - 24 - sizeof(mgmt->u.assoc_resp);
521 }
522
523 event.assoc_info.freq = drv->assoc_freq;
524
525 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
526 }
527
528
529 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
530 enum nl80211_commands cmd, struct nlattr *status,
531 struct nlattr *addr, struct nlattr *req_ie,
532 struct nlattr *resp_ie)
533 {
534 union wpa_event_data event;
535
536 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
537 /*
538 * Avoid reporting two association events that would confuse
539 * the core code.
540 */
541 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
542 "when using userspace SME", cmd);
543 return;
544 }
545
546 os_memset(&event, 0, sizeof(event));
547 if (cmd == NL80211_CMD_CONNECT &&
548 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
549 if (resp_ie) {
550 event.assoc_reject.resp_ies = nla_data(resp_ie);
551 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
552 }
553 event.assoc_reject.status_code = nla_get_u16(status);
554 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
555 return;
556 }
557
558 drv->associated = 1;
559 if (addr)
560 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
561
562 if (req_ie) {
563 event.assoc_info.req_ies = nla_data(req_ie);
564 event.assoc_info.req_ies_len = nla_len(req_ie);
565 }
566 if (resp_ie) {
567 event.assoc_info.resp_ies = nla_data(resp_ie);
568 event.assoc_info.resp_ies_len = nla_len(resp_ie);
569 }
570
571 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
572 }
573
574
575 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
576 enum nl80211_commands cmd, struct nlattr *addr)
577 {
578 union wpa_event_data event;
579 enum wpa_event_type ev;
580
581 if (nla_len(addr) != ETH_ALEN)
582 return;
583
584 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
585 cmd, MAC2STR((u8 *) nla_data(addr)));
586
587 if (cmd == NL80211_CMD_AUTHENTICATE)
588 ev = EVENT_AUTH_TIMED_OUT;
589 else if (cmd == NL80211_CMD_ASSOCIATE)
590 ev = EVENT_ASSOC_TIMED_OUT;
591 else
592 return;
593
594 os_memset(&event, 0, sizeof(event));
595 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
596 wpa_supplicant_event(drv->ctx, ev, &event);
597 }
598
599
600 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
601 struct nlattr *freq, const u8 *frame, size_t len)
602 {
603 const struct ieee80211_mgmt *mgmt;
604 union wpa_event_data event;
605 u16 fc, stype;
606
607 mgmt = (const struct ieee80211_mgmt *) frame;
608 if (len < 24) {
609 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
610 return;
611 }
612
613 fc = le_to_host16(mgmt->frame_control);
614 stype = WLAN_FC_GET_STYPE(fc);
615
616 os_memset(&event, 0, sizeof(event));
617 event.rx_action.da = mgmt->da;
618 event.rx_action.sa = mgmt->sa;
619 event.rx_action.bssid = mgmt->bssid;
620 event.rx_action.category = mgmt->u.action.category;
621 event.rx_action.data = &mgmt->u.action.category + 1;
622 event.rx_action.len = frame + len - event.rx_action.data;
623 if (freq)
624 event.rx_action.freq = nla_get_u32(freq);
625 wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
626 }
627
628
629 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
630 struct nlattr *cookie, const u8 *frame,
631 size_t len, struct nlattr *ack)
632 {
633 union wpa_event_data event;
634 const struct ieee80211_hdr *hdr;
635 u16 fc;
636 u64 cookie_val;
637
638 if (!cookie)
639 return;
640
641 cookie_val = nla_get_u64(cookie);
642 wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
643 (long long unsigned int) cookie_val,
644 cookie_val == drv->send_action_cookie ?
645 " (match)" : " (unknown)");
646 if (cookie_val != drv->send_action_cookie)
647 return;
648
649 hdr = (const struct ieee80211_hdr *) frame;
650 fc = le_to_host16(hdr->frame_control);
651
652 os_memset(&event, 0, sizeof(event));
653 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
654 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
655 event.tx_status.dst = hdr->addr1;
656 event.tx_status.data = frame;
657 event.tx_status.data_len = len;
658 event.tx_status.ack = ack != NULL;
659 wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
660 }
661
662
663 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
664 enum wpa_event_type type,
665 const u8 *frame, size_t len)
666 {
667 const struct ieee80211_mgmt *mgmt;
668 union wpa_event_data event;
669 const u8 *bssid = NULL;
670 u16 reason_code = 0;
671
672 drv->associated = 0;
673 os_memset(&event, 0, sizeof(event));
674
675 mgmt = (const struct ieee80211_mgmt *) frame;
676 if (len >= 24)
677 bssid = mgmt->bssid;
678 /* Note: Same offset for Reason Code in both frame subtypes */
679 if (len >= 24 + sizeof(mgmt->u.deauth))
680 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
681
682 if (type == EVENT_DISASSOC) {
683 event.disassoc_info.addr = bssid;
684 event.disassoc_info.reason_code = reason_code;
685 } else {
686 event.deauth_info.addr = bssid;
687 event.deauth_info.reason_code = reason_code;
688 }
689
690 wpa_supplicant_event(drv->ctx, type, &event);
691 }
692
693
694 static void mlme_event(struct wpa_driver_nl80211_data *drv,
695 enum nl80211_commands cmd, struct nlattr *frame,
696 struct nlattr *addr, struct nlattr *timed_out,
697 struct nlattr *freq, struct nlattr *ack,
698 struct nlattr *cookie)
699 {
700 if (timed_out && addr) {
701 mlme_timeout_event(drv, cmd, addr);
702 return;
703 }
704
705 if (frame == NULL) {
706 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
707 "data", cmd);
708 return;
709 }
710
711 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
712 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
713 nla_data(frame), nla_len(frame));
714
715 switch (cmd) {
716 case NL80211_CMD_AUTHENTICATE:
717 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
718 break;
719 case NL80211_CMD_ASSOCIATE:
720 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
721 break;
722 case NL80211_CMD_DEAUTHENTICATE:
723 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
724 nla_data(frame), nla_len(frame));
725 break;
726 case NL80211_CMD_DISASSOCIATE:
727 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
728 nla_data(frame), nla_len(frame));
729 break;
730 case NL80211_CMD_ACTION:
731 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
732 break;
733 case NL80211_CMD_ACTION_TX_STATUS:
734 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
735 nla_len(frame), ack);
736 break;
737 default:
738 break;
739 }
740 }
741
742
743 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
744 struct nlattr *tb[])
745 {
746 union wpa_event_data data;
747
748 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
749 os_memset(&data, 0, sizeof(data));
750 if (tb[NL80211_ATTR_MAC]) {
751 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
752 nla_data(tb[NL80211_ATTR_MAC]),
753 nla_len(tb[NL80211_ATTR_MAC]));
754 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
755 }
756 if (tb[NL80211_ATTR_KEY_SEQ]) {
757 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
758 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
759 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
760 }
761 if (tb[NL80211_ATTR_KEY_TYPE]) {
762 enum nl80211_key_type key_type =
763 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
764 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
765 if (key_type == NL80211_KEYTYPE_PAIRWISE)
766 data.michael_mic_failure.unicast = 1;
767 } else
768 data.michael_mic_failure.unicast = 1;
769
770 if (tb[NL80211_ATTR_KEY_IDX]) {
771 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
772 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
773 }
774
775 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
776 }
777
778
779 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
780 struct nlattr *tb[])
781 {
782 if (tb[NL80211_ATTR_MAC] == NULL) {
783 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
784 "event");
785 return;
786 }
787 os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
788 drv->associated = 1;
789 wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
790 MAC2STR(drv->bssid));
791
792 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
793 }
794
795
796 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
797 int cancel_event, struct nlattr *tb[])
798 {
799 unsigned int freq, chan_type, duration;
800 union wpa_event_data data;
801 u64 cookie;
802
803 if (tb[NL80211_ATTR_WIPHY_FREQ])
804 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
805 else
806 freq = 0;
807
808 if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
809 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
810 else
811 chan_type = 0;
812
813 if (tb[NL80211_ATTR_DURATION])
814 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
815 else
816 duration = 0;
817
818 if (tb[NL80211_ATTR_COOKIE])
819 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
820 else
821 cookie = 0;
822
823 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
824 "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
825 cancel_event, freq, chan_type, duration,
826 (long long unsigned int) cookie,
827 cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
828
829 if (cookie != drv->remain_on_chan_cookie)
830 return; /* not for us */
831
832 drv->pending_remain_on_chan = !cancel_event;
833
834 os_memset(&data, 0, sizeof(data));
835 data.remain_on_channel.freq = freq;
836 data.remain_on_channel.duration = duration;
837 wpa_supplicant_event(drv->ctx, cancel_event ?
838 EVENT_CANCEL_REMAIN_ON_CHANNEL :
839 EVENT_REMAIN_ON_CHANNEL, &data);
840 }
841
842
843 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
844 struct nlattr *tb[])
845 {
846 union wpa_event_data event;
847 struct nlattr *nl;
848 int rem;
849 struct scan_info *info;
850 #define MAX_REPORT_FREQS 50
851 int freqs[MAX_REPORT_FREQS];
852 int num_freqs = 0;
853
854 os_memset(&event, 0, sizeof(event));
855 info = &event.scan_info;
856 info->aborted = aborted;
857
858 if (tb[NL80211_ATTR_SCAN_SSIDS]) {
859 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
860 struct wpa_driver_scan_ssid *s =
861 &info->ssids[info->num_ssids];
862 s->ssid = nla_data(nl);
863 s->ssid_len = nla_len(nl);
864 info->num_ssids++;
865 if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
866 break;
867 }
868 }
869 if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
870 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
871 {
872 freqs[num_freqs] = nla_get_u32(nl);
873 num_freqs++;
874 if (num_freqs == MAX_REPORT_FREQS - 1)
875 break;
876 }
877 info->freqs = freqs;
878 info->num_freqs = num_freqs;
879 }
880 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
881 }
882
883
884 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
885 struct nlattr *tb[])
886 {
887 static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
888 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
889 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
890 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
891 };
892 struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
893 enum nl80211_cqm_rssi_threshold_event event;
894 union wpa_event_data ed;
895
896 if (tb[NL80211_ATTR_CQM] == NULL ||
897 nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
898 cqm_policy)) {
899 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
900 return;
901 }
902
903 if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
904 return;
905 event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
906
907 os_memset(&ed, 0, sizeof(ed));
908
909 if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
910 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
911 "event: RSSI high");
912 ed.signal_change.above_threshold = 1;
913 } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
914 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
915 "event: RSSI low");
916 ed.signal_change.above_threshold = 0;
917 } else
918 return;
919
920 wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
921 }
922
923
924 static int process_event(struct nl_msg *msg, void *arg)
925 {
926 struct wpa_driver_nl80211_data *drv = arg;
927 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
928 struct nlattr *tb[NL80211_ATTR_MAX + 1];
929 union wpa_event_data data;
930
931 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
932 genlmsg_attrlen(gnlh, 0), NULL);
933
934 if (tb[NL80211_ATTR_IFINDEX]) {
935 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
936 if (ifindex != drv->ifindex) {
937 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
938 " for foreign interface (ifindex %d)",
939 gnlh->cmd, ifindex);
940 return NL_SKIP;
941 }
942 }
943
944 if (drv->ap_scan_as_station &&
945 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
946 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
947 wpa_driver_nl80211_set_mode(&drv->first_bss,
948 IEEE80211_MODE_AP);
949 drv->ap_scan_as_station = 0;
950 }
951
952 switch (gnlh->cmd) {
953 case NL80211_CMD_TRIGGER_SCAN:
954 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
955 break;
956 case NL80211_CMD_NEW_SCAN_RESULTS:
957 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
958 drv->scan_complete_events = 1;
959 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
960 drv->ctx);
961 send_scan_event(drv, 0, tb);
962 break;
963 case NL80211_CMD_SCAN_ABORTED:
964 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
965 /*
966 * Need to indicate that scan results are available in order
967 * not to make wpa_supplicant stop its scanning.
968 */
969 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
970 drv->ctx);
971 send_scan_event(drv, 1, tb);
972 break;
973 case NL80211_CMD_AUTHENTICATE:
974 case NL80211_CMD_ASSOCIATE:
975 case NL80211_CMD_DEAUTHENTICATE:
976 case NL80211_CMD_DISASSOCIATE:
977 case NL80211_CMD_ACTION:
978 case NL80211_CMD_ACTION_TX_STATUS:
979 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
980 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
981 tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
982 tb[NL80211_ATTR_COOKIE]);
983 break;
984 case NL80211_CMD_CONNECT:
985 case NL80211_CMD_ROAM:
986 mlme_event_connect(drv, gnlh->cmd,
987 tb[NL80211_ATTR_STATUS_CODE],
988 tb[NL80211_ATTR_MAC],
989 tb[NL80211_ATTR_REQ_IE],
990 tb[NL80211_ATTR_RESP_IE]);
991 break;
992 case NL80211_CMD_DISCONNECT:
993 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
994 /*
995 * Avoid reporting two disassociation events that could
996 * confuse the core code.
997 */
998 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
999 "event when using userspace SME");
1000 break;
1001 }
1002 drv->associated = 0;
1003 os_memset(&data, 0, sizeof(data));
1004 if (tb[NL80211_ATTR_REASON_CODE])
1005 data.disassoc_info.reason_code =
1006 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1007 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1008 break;
1009 case NL80211_CMD_MICHAEL_MIC_FAILURE:
1010 mlme_event_michael_mic_failure(drv, tb);
1011 break;
1012 case NL80211_CMD_JOIN_IBSS:
1013 mlme_event_join_ibss(drv, tb);
1014 break;
1015 case NL80211_CMD_REMAIN_ON_CHANNEL:
1016 mlme_event_remain_on_channel(drv, 0, tb);
1017 break;
1018 case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1019 mlme_event_remain_on_channel(drv, 1, tb);
1020 break;
1021 case NL80211_CMD_NOTIFY_CQM:
1022 nl80211_cqm_event(drv, tb);
1023 break;
1024 default:
1025 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1026 "(cmd=%d)", gnlh->cmd);
1027 break;
1028 }
1029
1030 return NL_SKIP;
1031 }
1032
1033
1034 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1035 void *sock_ctx)
1036 {
1037 struct nl_cb *cb;
1038 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1039
1040 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1041
1042 cb = nl_cb_clone(drv->nl_cb);
1043 if (!cb)
1044 return;
1045 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1046 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1047 nl_recvmsgs(drv->nl_handle_event, cb);
1048 nl_cb_put(cb);
1049 }
1050
1051
1052 /**
1053 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1054 * @priv: driver_nl80211 private data
1055 * @alpha2_arg: country to which to switch to
1056 * Returns: 0 on success, -1 on failure
1057 *
1058 * This asks nl80211 to set the regulatory domain for given
1059 * country ISO / IEC alpha2.
1060 */
1061 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1062 {
1063 struct i802_bss *bss = priv;
1064 struct wpa_driver_nl80211_data *drv = bss->drv;
1065 char alpha2[3];
1066 struct nl_msg *msg;
1067
1068 msg = nlmsg_alloc();
1069 if (!msg)
1070 return -ENOMEM;
1071
1072 alpha2[0] = alpha2_arg[0];
1073 alpha2[1] = alpha2_arg[1];
1074 alpha2[2] = '\0';
1075
1076 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1077 0, NL80211_CMD_REQ_SET_REG, 0);
1078
1079 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1080 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1081 return -EINVAL;
1082 return 0;
1083 nla_put_failure:
1084 return -EINVAL;
1085 }
1086
1087
1088 #ifndef HOSTAPD
1089 struct wiphy_info_data {
1090 int max_scan_ssids;
1091 int ap_supported;
1092 int auth_supported;
1093 int connect_supported;
1094 };
1095
1096
1097 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1098 {
1099 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1100 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1101 struct wiphy_info_data *info = arg;
1102
1103 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1104 genlmsg_attrlen(gnlh, 0), NULL);
1105
1106 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1107 info->max_scan_ssids =
1108 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1109
1110 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1111 struct nlattr *nl_mode;
1112 int i;
1113 nla_for_each_nested(nl_mode,
1114 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1115 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1116 info->ap_supported = 1;
1117 break;
1118 }
1119 }
1120 }
1121
1122 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1123 struct nlattr *nl_cmd;
1124 int i;
1125
1126 nla_for_each_nested(nl_cmd,
1127 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1128 u32 cmd = nla_get_u32(nl_cmd);
1129 if (cmd == NL80211_CMD_AUTHENTICATE)
1130 info->auth_supported = 1;
1131 else if (cmd == NL80211_CMD_CONNECT)
1132 info->connect_supported = 1;
1133 }
1134 }
1135
1136 return NL_SKIP;
1137 }
1138
1139
1140 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1141 struct wiphy_info_data *info)
1142 {
1143 struct nl_msg *msg;
1144
1145 os_memset(info, 0, sizeof(*info));
1146 msg = nlmsg_alloc();
1147 if (!msg)
1148 return -1;
1149
1150 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1151 0, NL80211_CMD_GET_WIPHY, 0);
1152
1153 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1154
1155 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1156 return 0;
1157 msg = NULL;
1158 nla_put_failure:
1159 nlmsg_free(msg);
1160 return -1;
1161 }
1162
1163
1164 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1165 {
1166 struct wiphy_info_data info;
1167 if (wpa_driver_nl80211_get_info(drv, &info))
1168 return -1;
1169 drv->has_capability = 1;
1170 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1171 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1172 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1173 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1174 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1175 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1176 WPA_DRIVER_CAPA_ENC_WEP104 |
1177 WPA_DRIVER_CAPA_ENC_TKIP |
1178 WPA_DRIVER_CAPA_ENC_CCMP;
1179 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1180 WPA_DRIVER_AUTH_SHARED |
1181 WPA_DRIVER_AUTH_LEAP;
1182
1183 drv->capa.max_scan_ssids = info.max_scan_ssids;
1184 if (info.ap_supported)
1185 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1186
1187 if (info.auth_supported)
1188 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1189 else if (!info.connect_supported) {
1190 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1191 "authentication/association or connect commands");
1192 return -1;
1193 }
1194
1195 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1196 drv->capa.max_remain_on_chan = 5000;
1197
1198 return 0;
1199 }
1200 #endif /* HOSTAPD */
1201
1202
1203 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1204 void *ctx)
1205 {
1206 int ret;
1207
1208 /* Initialize generic netlink and nl80211 */
1209
1210 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1211 if (drv->nl_cb == NULL) {
1212 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1213 "callbacks");
1214 goto err1;
1215 }
1216
1217 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1218 if (drv->nl_handle == NULL) {
1219 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1220 "callbacks");
1221 goto err2;
1222 }
1223
1224 drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1225 if (drv->nl_handle_event == NULL) {
1226 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1227 "callbacks (event)");
1228 goto err2b;
1229 }
1230
1231 if (genl_connect(drv->nl_handle)) {
1232 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1233 "netlink");
1234 goto err3;
1235 }
1236
1237 if (genl_connect(drv->nl_handle_event)) {
1238 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1239 "netlink (event)");
1240 goto err3;
1241 }
1242
1243 #ifdef CONFIG_LIBNL20
1244 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1245 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1246 "netlink cache");
1247 goto err3;
1248 }
1249 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1250 0) {
1251 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1252 "netlink cache (event)");
1253 goto err3b;
1254 }
1255 #else /* CONFIG_LIBNL20 */
1256 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1257 if (drv->nl_cache == NULL) {
1258 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1259 "netlink cache");
1260 goto err3;
1261 }
1262 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1263 if (drv->nl_cache_event == NULL) {
1264 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1265 "netlink cache (event)");
1266 goto err3b;
1267 }
1268 #endif /* CONFIG_LIBNL20 */
1269
1270 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1271 if (drv->nl80211 == NULL) {
1272 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1273 "found");
1274 goto err4;
1275 }
1276
1277 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1278 if (ret >= 0)
1279 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1280 if (ret < 0) {
1281 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1282 "membership for scan events: %d (%s)",
1283 ret, strerror(-ret));
1284 goto err4;
1285 }
1286
1287 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1288 if (ret >= 0)
1289 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1290 if (ret < 0) {
1291 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1292 "membership for mlme events: %d (%s)",
1293 ret, strerror(-ret));
1294 goto err4;
1295 }
1296
1297 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1298 wpa_driver_nl80211_event_receive, drv, ctx);
1299
1300 return 0;
1301
1302 err4:
1303 nl_cache_free(drv->nl_cache_event);
1304 err3b:
1305 nl_cache_free(drv->nl_cache);
1306 err3:
1307 nl_handle_destroy(drv->nl_handle_event);
1308 err2b:
1309 nl_handle_destroy(drv->nl_handle);
1310 err2:
1311 nl_cb_put(drv->nl_cb);
1312 err1:
1313 return -1;
1314 }
1315
1316
1317 /**
1318 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1319 * @ctx: context to be used when calling wpa_supplicant functions,
1320 * e.g., wpa_supplicant_event()
1321 * @ifname: interface name, e.g., wlan0
1322 * Returns: Pointer to private data, %NULL on failure
1323 */
1324 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1325 {
1326 struct wpa_driver_nl80211_data *drv;
1327 struct netlink_config *cfg;
1328 struct i802_bss *bss;
1329
1330 drv = os_zalloc(sizeof(*drv));
1331 if (drv == NULL)
1332 return NULL;
1333 drv->ctx = ctx;
1334 bss = &drv->first_bss;
1335 bss->drv = drv;
1336 os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1337 drv->monitor_ifidx = -1;
1338 drv->monitor_sock = -1;
1339 drv->ioctl_sock = -1;
1340
1341 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1342 os_free(drv);
1343 return NULL;
1344 }
1345
1346 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1347 if (drv->ioctl_sock < 0) {
1348 perror("socket(PF_INET,SOCK_DGRAM)");
1349 goto failed;
1350 }
1351
1352 cfg = os_zalloc(sizeof(*cfg));
1353 if (cfg == NULL)
1354 goto failed;
1355 cfg->ctx = drv;
1356 cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1357 cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1358 drv->netlink = netlink_init(cfg);
1359 if (drv->netlink == NULL) {
1360 os_free(cfg);
1361 goto failed;
1362 }
1363 if (wpa_driver_nl80211_finish_drv_init(drv))
1364 goto failed;
1365
1366 return bss;
1367
1368 failed:
1369 netlink_deinit(drv->netlink);
1370 if (drv->ioctl_sock >= 0)
1371 close(drv->ioctl_sock);
1372
1373 genl_family_put(drv->nl80211);
1374 nl_cache_free(drv->nl_cache);
1375 nl_handle_destroy(drv->nl_handle);
1376 nl_cb_put(drv->nl_cb);
1377 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1378
1379 os_free(drv);
1380 return NULL;
1381 }
1382
1383
1384 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1385 const u8 *match, size_t match_len)
1386 {
1387 struct nl_msg *msg;
1388 int ret = -1;
1389
1390 msg = nlmsg_alloc();
1391 if (!msg)
1392 return -1;
1393
1394 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1395 NL80211_CMD_REGISTER_ACTION, 0);
1396
1397 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1398 NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1399
1400 ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1401 msg = NULL;
1402 if (ret) {
1403 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1404 "failed: ret=%d (%s)", ret, strerror(-ret));
1405 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1406 match, match_len);
1407 goto nla_put_failure;
1408 }
1409 ret = 0;
1410 nla_put_failure:
1411 nlmsg_free(msg);
1412 return ret;
1413 }
1414
1415
1416 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1417 {
1418 /* FT Action frames */
1419 if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1420 return -1;
1421 else
1422 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1423 WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1424
1425 return 0;
1426 }
1427
1428
1429 static int
1430 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1431 {
1432 struct i802_bss *bss = &drv->first_bss;
1433
1434 drv->ifindex = if_nametoindex(bss->ifname);
1435 drv->first_bss.ifindex = drv->ifindex;
1436
1437 #ifndef HOSTAPD
1438 if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1439 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1440 "use managed mode");
1441 }
1442
1443 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1444 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1445 bss->ifname);
1446 return -1;
1447 }
1448
1449 if (wpa_driver_nl80211_capa(drv))
1450 return -1;
1451
1452 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1453 1, IF_OPER_DORMANT);
1454 #endif /* HOSTAPD */
1455
1456 if (nl80211_register_action_frames(drv) < 0) {
1457 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1458 "frame processing - ignore for now");
1459 /*
1460 * Older kernel versions did not support this, so ignore the
1461 * error for now. Some functionality may not be available
1462 * because of this.
1463 */
1464 }
1465
1466 return 0;
1467 }
1468
1469
1470 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1471 {
1472 struct nl_msg *msg;
1473
1474 msg = nlmsg_alloc();
1475 if (!msg)
1476 return -ENOMEM;
1477
1478 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1479 0, NL80211_CMD_DEL_BEACON, 0);
1480 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1481
1482 return send_and_recv_msgs(drv, msg, NULL, NULL);
1483 nla_put_failure:
1484 return -ENOBUFS;
1485 }
1486
1487
1488 /**
1489 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1490 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1491 *
1492 * Shut down driver interface and processing of driver events. Free
1493 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1494 */
1495 static void wpa_driver_nl80211_deinit(void *priv)
1496 {
1497 struct i802_bss *bss = priv;
1498 struct wpa_driver_nl80211_data *drv = bss->drv;
1499
1500 if (drv->added_if_into_bridge) {
1501 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1502 < 0)
1503 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1504 "interface %s from bridge %s: %s",
1505 bss->ifname, drv->brname, strerror(errno));
1506 }
1507 if (drv->added_bridge) {
1508 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1509 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1510 "bridge %s: %s",
1511 drv->brname, strerror(errno));
1512 }
1513
1514 nl80211_remove_monitor_interface(drv);
1515
1516 if (drv->nlmode == NL80211_IFTYPE_AP)
1517 wpa_driver_nl80211_del_beacon(drv);
1518
1519 #ifdef HOSTAPD
1520 if (drv->last_freq_ht) {
1521 /* Clear HT flags from the driver */
1522 struct hostapd_freq_params freq;
1523 os_memset(&freq, 0, sizeof(freq));
1524 freq.freq = drv->last_freq;
1525 i802_set_freq(priv, &freq);
1526 }
1527
1528 if (drv->eapol_sock >= 0) {
1529 eloop_unregister_read_sock(drv->eapol_sock);
1530 close(drv->eapol_sock);
1531 }
1532
1533 if (drv->if_indices != drv->default_if_indices)
1534 os_free(drv->if_indices);
1535 #endif /* HOSTAPD */
1536
1537 if (drv->disable_11b_rates)
1538 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1539
1540 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1541 netlink_deinit(drv->netlink);
1542
1543 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1544
1545 (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1546 wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1547
1548 if (drv->ioctl_sock >= 0)
1549 close(drv->ioctl_sock);
1550
1551 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1552 genl_family_put(drv->nl80211);
1553 nl_cache_free(drv->nl_cache);
1554 nl_cache_free(drv->nl_cache_event);
1555 nl_handle_destroy(drv->nl_handle);
1556 nl_handle_destroy(drv->nl_handle_event);
1557 nl_cb_put(drv->nl_cb);
1558
1559 eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1560 drv, NULL);
1561
1562 os_free(drv->filter_ssids);
1563
1564 os_free(drv);
1565 }
1566
1567
1568 /**
1569 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1570 * @eloop_ctx: Driver private data
1571 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1572 *
1573 * This function can be used as registered timeout when starting a scan to
1574 * generate a scan completed event if the driver does not report this.
1575 */
1576 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1577 {
1578 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1579 if (drv->ap_scan_as_station) {
1580 wpa_driver_nl80211_set_mode(&drv->first_bss,
1581 IEEE80211_MODE_AP);
1582 drv->ap_scan_as_station = 0;
1583 }
1584 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1585 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1586 }
1587
1588
1589 /**
1590 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1591 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1592 * @params: Scan parameters
1593 * Returns: 0 on success, -1 on failure
1594 */
1595 static int wpa_driver_nl80211_scan(void *priv,
1596 struct wpa_driver_scan_params *params)
1597 {
1598 struct i802_bss *bss = priv;
1599 struct wpa_driver_nl80211_data *drv = bss->drv;
1600 int ret = 0, timeout;
1601 struct nl_msg *msg, *ssids, *freqs;
1602 size_t i;
1603
1604 msg = nlmsg_alloc();
1605 ssids = nlmsg_alloc();
1606 freqs = nlmsg_alloc();
1607 if (!msg || !ssids || !freqs) {
1608 nlmsg_free(msg);
1609 nlmsg_free(ssids);
1610 nlmsg_free(freqs);
1611 return -1;
1612 }
1613
1614 os_free(drv->filter_ssids);
1615 drv->filter_ssids = params->filter_ssids;
1616 params->filter_ssids = NULL;
1617 drv->num_filter_ssids = params->num_filter_ssids;
1618
1619 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1620 NL80211_CMD_TRIGGER_SCAN, 0);
1621
1622 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1623
1624 for (i = 0; i < params->num_ssids; i++) {
1625 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1626 params->ssids[i].ssid,
1627 params->ssids[i].ssid_len);
1628 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1629 params->ssids[i].ssid);
1630 }
1631 if (params->num_ssids)
1632 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1633
1634 if (params->extra_ies) {
1635 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1636 params->extra_ies, params->extra_ies_len);
1637 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1638 params->extra_ies);
1639 }
1640
1641 if (params->freqs) {
1642 for (i = 0; params->freqs[i]; i++) {
1643 wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1644 "MHz", params->freqs[i]);
1645 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1646 }
1647 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1648 }
1649
1650 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1651 msg = NULL;
1652 if (ret) {
1653 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1654 "(%s)", ret, strerror(-ret));
1655 #ifdef HOSTAPD
1656 if (drv->nlmode == NL80211_IFTYPE_AP) {
1657 /*
1658 * mac80211 does not allow scan requests in AP mode, so
1659 * try to do this in station mode.
1660 */
1661 if (wpa_driver_nl80211_set_mode(bss,
1662 IEEE80211_MODE_INFRA))
1663 goto nla_put_failure;
1664
1665 if (wpa_driver_nl80211_scan(drv, params)) {
1666 wpa_driver_nl80211_set_mode(bss,
1667 IEEE80211_MODE_AP);
1668 goto nla_put_failure;
1669 }
1670
1671 /* Restore AP mode when processing scan results */
1672 drv->ap_scan_as_station = 1;
1673 ret = 0;
1674 } else
1675 goto nla_put_failure;
1676 #else /* HOSTAPD */
1677 goto nla_put_failure;
1678 #endif /* HOSTAPD */
1679 }
1680
1681 /* Not all drivers generate "scan completed" wireless event, so try to
1682 * read results after a timeout. */
1683 timeout = 10;
1684 if (drv->scan_complete_events) {
1685 /*
1686 * The driver seems to deliver events to notify when scan is
1687 * complete, so use longer timeout to avoid race conditions
1688 * with scanning and following association request.
1689 */
1690 timeout = 30;
1691 }
1692 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1693 "seconds", ret, timeout);
1694 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1695 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1696 drv, drv->ctx);
1697
1698 nla_put_failure:
1699 nlmsg_free(ssids);
1700 nlmsg_free(msg);
1701 nlmsg_free(freqs);
1702 return ret;
1703 }
1704
1705
1706 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1707 {
1708 const u8 *end, *pos;
1709
1710 if (ies == NULL)
1711 return NULL;
1712
1713 pos = ies;
1714 end = ies + ies_len;
1715
1716 while (pos + 1 < end) {
1717 if (pos + 2 + pos[1] > end)
1718 break;
1719 if (pos[0] == ie)
1720 return pos;
1721 pos += 2 + pos[1];
1722 }
1723
1724 return NULL;
1725 }
1726
1727
1728 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1729 const u8 *ie, size_t ie_len)
1730 {
1731 const u8 *ssid;
1732 size_t i;
1733
1734 if (drv->filter_ssids == NULL)
1735 return 0;
1736
1737 ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1738 if (ssid == NULL)
1739 return 1;
1740
1741 for (i = 0; i < drv->num_filter_ssids; i++) {
1742 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1743 os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1744 0)
1745 return 0;
1746 }
1747
1748 return 1;
1749 }
1750
1751
1752 struct nl80211_bss_info_arg {
1753 struct wpa_driver_nl80211_data *drv;
1754 struct wpa_scan_results *res;
1755 };
1756
1757 static int bss_info_handler(struct nl_msg *msg, void *arg)
1758 {
1759 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1760 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1761 struct nlattr *bss[NL80211_BSS_MAX + 1];
1762 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1763 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1764 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1765 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1766 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1767 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1768 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1769 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1770 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1771 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1772 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1773 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1774 };
1775 struct nl80211_bss_info_arg *_arg = arg;
1776 struct wpa_scan_results *res = _arg->res;
1777 struct wpa_scan_res **tmp;
1778 struct wpa_scan_res *r;
1779 const u8 *ie, *beacon_ie;
1780 size_t ie_len, beacon_ie_len;
1781 u8 *pos;
1782
1783 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1784 genlmsg_attrlen(gnlh, 0), NULL);
1785 if (!tb[NL80211_ATTR_BSS])
1786 return NL_SKIP;
1787 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1788 bss_policy))
1789 return NL_SKIP;
1790 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1791 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1792 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1793 } else {
1794 ie = NULL;
1795 ie_len = 0;
1796 }
1797 if (bss[NL80211_BSS_BEACON_IES]) {
1798 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1799 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1800 } else {
1801 beacon_ie = NULL;
1802 beacon_ie_len = 0;
1803 }
1804
1805 if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
1806 ie ? ie_len : beacon_ie_len))
1807 return NL_SKIP;
1808
1809 r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1810 if (r == NULL)
1811 return NL_SKIP;
1812 if (bss[NL80211_BSS_BSSID])
1813 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1814 ETH_ALEN);
1815 if (bss[NL80211_BSS_FREQUENCY])
1816 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1817 if (bss[NL80211_BSS_BEACON_INTERVAL])
1818 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1819 if (bss[NL80211_BSS_CAPABILITY])
1820 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1821 r->flags |= WPA_SCAN_NOISE_INVALID;
1822 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1823 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1824 r->level /= 100; /* mBm to dBm */
1825 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1826 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1827 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1828 r->flags |= WPA_SCAN_LEVEL_INVALID;
1829 } else
1830 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1831 if (bss[NL80211_BSS_TSF])
1832 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1833 if (bss[NL80211_BSS_SEEN_MS_AGO])
1834 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1835 r->ie_len = ie_len;
1836 pos = (u8 *) (r + 1);
1837 if (ie) {
1838 os_memcpy(pos, ie, ie_len);
1839 pos += ie_len;
1840 }
1841 r->beacon_ie_len = beacon_ie_len;
1842 if (beacon_ie)
1843 os_memcpy(pos, beacon_ie, beacon_ie_len);
1844
1845 if (bss[NL80211_BSS_STATUS]) {
1846 enum nl80211_bss_status status;
1847 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1848 switch (status) {
1849 case NL80211_BSS_STATUS_AUTHENTICATED:
1850 r->flags |= WPA_SCAN_AUTHENTICATED;
1851 break;
1852 case NL80211_BSS_STATUS_ASSOCIATED:
1853 r->flags |= WPA_SCAN_ASSOCIATED;
1854 break;
1855 default:
1856 break;
1857 }
1858 }
1859
1860 tmp = os_realloc(res->res,
1861 (res->num + 1) * sizeof(struct wpa_scan_res *));
1862 if (tmp == NULL) {
1863 os_free(r);
1864 return NL_SKIP;
1865 }
1866 tmp[res->num++] = r;
1867 res->res = tmp;
1868
1869 return NL_SKIP;
1870 }
1871
1872
1873 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1874 const u8 *addr)
1875 {
1876 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1877 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1878 "mismatch (" MACSTR ")", MAC2STR(addr));
1879 wpa_driver_nl80211_mlme(drv, addr,
1880 NL80211_CMD_DEAUTHENTICATE,
1881 WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
1882 }
1883 }
1884
1885
1886 static void wpa_driver_nl80211_check_bss_status(
1887 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1888 {
1889 size_t i;
1890
1891 for (i = 0; i < res->num; i++) {
1892 struct wpa_scan_res *r = res->res[i];
1893 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1894 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1895 "indicates BSS status with " MACSTR
1896 " as authenticated",
1897 MAC2STR(r->bssid));
1898 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1899 os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1900 os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1901 0) {
1902 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1903 " in local state (auth=" MACSTR
1904 " assoc=" MACSTR ")",
1905 MAC2STR(drv->auth_bssid),
1906 MAC2STR(drv->bssid));
1907 clear_state_mismatch(drv, r->bssid);
1908 }
1909 }
1910
1911 if (r->flags & WPA_SCAN_ASSOCIATED) {
1912 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1913 "indicate BSS status with " MACSTR
1914 " as associated",
1915 MAC2STR(r->bssid));
1916 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1917 !drv->associated) {
1918 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1919 "(not associated) does not match "
1920 "with BSS state");
1921 clear_state_mismatch(drv, r->bssid);
1922 } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1923 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1924 0) {
1925 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1926 "(associated with " MACSTR ") does "
1927 "not match with BSS state",
1928 MAC2STR(drv->bssid));
1929 clear_state_mismatch(drv, r->bssid);
1930 clear_state_mismatch(drv, drv->bssid);
1931 }
1932 }
1933 }
1934 }
1935
1936
1937 static void wpa_scan_results_free(struct wpa_scan_results *res)
1938 {
1939 size_t i;
1940
1941 if (res == NULL)
1942 return;
1943
1944 for (i = 0; i < res->num; i++)
1945 os_free(res->res[i]);
1946 os_free(res->res);
1947 os_free(res);
1948 }
1949
1950
1951 static struct wpa_scan_results *
1952 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
1953 {
1954 struct nl_msg *msg;
1955 struct wpa_scan_results *res;
1956 int ret;
1957 struct nl80211_bss_info_arg arg;
1958
1959 res = os_zalloc(sizeof(*res));
1960 if (res == NULL)
1961 return NULL;
1962 msg = nlmsg_alloc();
1963 if (!msg)
1964 goto nla_put_failure;
1965
1966 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1967 NL80211_CMD_GET_SCAN, 0);
1968 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1969
1970 arg.drv = drv;
1971 arg.res = res;
1972 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
1973 msg = NULL;
1974 if (ret == 0) {
1975 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1976 (unsigned long) res->num);
1977 return res;
1978 }
1979 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1980 "(%s)", ret, strerror(-ret));
1981 nla_put_failure:
1982 nlmsg_free(msg);
1983 wpa_scan_results_free(res);
1984 return NULL;
1985 }
1986
1987
1988 /**
1989 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1990 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1991 * Returns: Scan results on success, -1 on failure
1992 */
1993 static struct wpa_scan_results *
1994 wpa_driver_nl80211_get_scan_results(void *priv)
1995 {
1996 struct i802_bss *bss = priv;
1997 struct wpa_driver_nl80211_data *drv = bss->drv;
1998 struct wpa_scan_results *res;
1999
2000 res = nl80211_get_scan_results(drv);
2001 if (res)
2002 wpa_driver_nl80211_check_bss_status(drv, res);
2003 return res;
2004 }
2005
2006
2007 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2008 {
2009 struct wpa_scan_results *res;
2010 size_t i;
2011
2012 res = nl80211_get_scan_results(drv);
2013 if (res == NULL) {
2014 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2015 return;
2016 }
2017
2018 wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2019 for (i = 0; i < res->num; i++) {
2020 struct wpa_scan_res *r = res->res[i];
2021 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2022 (int) i, (int) res->num, MAC2STR(r->bssid),
2023 r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2024 r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2025 }
2026
2027 wpa_scan_results_free(res);
2028 }
2029
2030
2031 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2032 enum wpa_alg alg, const u8 *addr,
2033 int key_idx, int set_tx,
2034 const u8 *seq, size_t seq_len,
2035 const u8 *key, size_t key_len)
2036 {
2037 struct i802_bss *bss = priv;
2038 struct wpa_driver_nl80211_data *drv = bss->drv;
2039 int ifindex = if_nametoindex(ifname);
2040 struct nl_msg *msg;
2041 int ret;
2042
2043 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2044 "set_tx=%d seq_len=%lu key_len=%lu",
2045 __func__, ifindex, alg, addr, key_idx, set_tx,
2046 (unsigned long) seq_len, (unsigned long) key_len);
2047
2048 msg = nlmsg_alloc();
2049 if (!msg)
2050 return -ENOMEM;
2051
2052 if (alg == WPA_ALG_NONE) {
2053 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2054 0, NL80211_CMD_DEL_KEY, 0);
2055 } else {
2056 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2057 0, NL80211_CMD_NEW_KEY, 0);
2058 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2059 switch (alg) {
2060 case WPA_ALG_WEP:
2061 if (key_len == 5)
2062 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2063 WLAN_CIPHER_SUITE_WEP40);
2064 else
2065 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2066 WLAN_CIPHER_SUITE_WEP104);
2067 break;
2068 case WPA_ALG_TKIP:
2069 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2070 WLAN_CIPHER_SUITE_TKIP);
2071 break;
2072 case WPA_ALG_CCMP:
2073 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2074 WLAN_CIPHER_SUITE_CCMP);
2075 break;
2076 case WPA_ALG_IGTK:
2077 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2078 WLAN_CIPHER_SUITE_AES_CMAC);
2079 break;
2080 default:
2081 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2082 "algorithm %d", __func__, alg);
2083 nlmsg_free(msg);
2084 return -1;
2085 }
2086 }
2087
2088 if (seq && seq_len)
2089 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2090
2091 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2092 {
2093 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
2094 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2095 }
2096 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2097 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2098
2099 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2100 if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2101 ret = 0;
2102 if (ret)
2103 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2104 ret, strerror(-ret));
2105
2106 /*
2107 * If we failed or don't need to set the default TX key (below),
2108 * we're done here.
2109 */
2110 if (ret || !set_tx || alg == WPA_ALG_NONE)
2111 return ret;
2112 #ifdef HOSTAPD
2113 if (addr)
2114 return ret;
2115 #else /* HOSTAPD */
2116 if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2117 return ret;
2118 #endif /* HOSTAPD */
2119
2120 msg = nlmsg_alloc();
2121 if (!msg)
2122 return -ENOMEM;
2123
2124 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2125 0, NL80211_CMD_SET_KEY, 0);
2126 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2127 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2128 if (alg == WPA_ALG_IGTK)
2129 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2130 else
2131 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2132
2133 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2134 if (ret == -ENOENT)
2135 ret = 0;
2136 if (ret)
2137 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2138 "err=%d %s)", ret, strerror(-ret));
2139 return ret;
2140
2141 nla_put_failure:
2142 return -ENOBUFS;
2143 }
2144
2145
2146 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2147 int key_idx, int defkey,
2148 const u8 *seq, size_t seq_len,
2149 const u8 *key, size_t key_len)
2150 {
2151 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2152 if (!key_attr)
2153 return -1;
2154
2155 if (defkey && alg == WPA_ALG_IGTK)
2156 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2157 else if (defkey)
2158 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2159
2160 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2161
2162 switch (alg) {
2163 case WPA_ALG_WEP:
2164 if (key_len == 5)
2165 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2166 WLAN_CIPHER_SUITE_WEP40);
2167 else
2168 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2169 WLAN_CIPHER_SUITE_WEP104);
2170 break;
2171 case WPA_ALG_TKIP:
2172 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2173 break;
2174 case WPA_ALG_CCMP:
2175 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2176 break;
2177 case WPA_ALG_IGTK:
2178 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2179 WLAN_CIPHER_SUITE_AES_CMAC);
2180 break;
2181 default:
2182 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2183 "algorithm %d", __func__, alg);
2184 return -1;
2185 }
2186
2187 if (seq && seq_len)
2188 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2189
2190 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2191
2192 nla_nest_end(msg, key_attr);
2193
2194 return 0;
2195 nla_put_failure:
2196 return -1;
2197 }
2198
2199
2200 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2201 struct nl_msg *msg)
2202 {
2203 int i, privacy = 0;
2204 struct nlattr *nl_keys, *nl_key;
2205
2206 for (i = 0; i < 4; i++) {
2207 if (!params->wep_key[i])
2208 continue;
2209 privacy = 1;
2210 break;
2211 }
2212 if (!privacy)
2213 return 0;
2214
2215 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2216
2217 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2218 if (!nl_keys)
2219 goto nla_put_failure;
2220
2221 for (i = 0; i < 4; i++) {
2222 if (!params->wep_key[i])
2223 continue;
2224
2225 nl_key = nla_nest_start(msg, i);
2226 if (!nl_key)
2227 goto nla_put_failure;
2228
2229 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2230 params->wep_key[i]);
2231 if (params->wep_key_len[i] == 5)
2232 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2233 WLAN_CIPHER_SUITE_WEP40);
2234 else
2235 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2236 WLAN_CIPHER_SUITE_WEP104);
2237
2238 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2239
2240 if (i == params->wep_tx_keyidx)
2241 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2242
2243 nla_nest_end(msg, nl_key);
2244 }
2245 nla_nest_end(msg, nl_keys);
2246
2247 return 0;
2248
2249 nla_put_failure:
2250 return -ENOBUFS;
2251 }
2252
2253
2254 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2255 const u8 *addr, int cmd, u16 reason_code,
2256 int local_state_change)
2257 {
2258 int ret = -1;
2259 struct nl_msg *msg;
2260
2261 msg = nlmsg_alloc();
2262 if (!msg)
2263 return -1;
2264
2265 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2266
2267 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2268 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2269 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2270 if (local_state_change)
2271 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2272
2273 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2274 msg = NULL;
2275 if (ret) {
2276 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2277 "(%s)", ret, strerror(-ret));
2278 goto nla_put_failure;
2279 }
2280 ret = 0;
2281
2282 nla_put_failure:
2283 nlmsg_free(msg);
2284 return ret;
2285 }
2286
2287
2288 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2289 const u8 *addr, int reason_code)
2290 {
2291 wpa_printf(MSG_DEBUG, "%s", __func__);
2292 drv->associated = 0;
2293 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2294 reason_code, 0);
2295 }
2296
2297
2298 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2299 int reason_code)
2300 {
2301 struct i802_bss *bss = priv;
2302 struct wpa_driver_nl80211_data *drv = bss->drv;
2303 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2304 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2305 wpa_printf(MSG_DEBUG, "%s", __func__);
2306 drv->associated = 0;
2307 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2308 reason_code, 0);
2309 }
2310
2311
2312 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2313 int reason_code)
2314 {
2315 struct i802_bss *bss = priv;
2316 struct wpa_driver_nl80211_data *drv = bss->drv;
2317 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2318 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2319 wpa_printf(MSG_DEBUG, "%s", __func__);
2320 drv->associated = 0;
2321 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2322 reason_code, 0);
2323 }
2324
2325
2326 static int wpa_driver_nl80211_authenticate(
2327 void *priv, struct wpa_driver_auth_params *params)
2328 {
2329 struct i802_bss *bss = priv;
2330 struct wpa_driver_nl80211_data *drv = bss->drv;
2331 int ret = -1, i;
2332 struct nl_msg *msg;
2333 enum nl80211_auth_type type;
2334 int count = 0;
2335
2336 drv->associated = 0;
2337 os_memset(drv->auth_bssid, 0, ETH_ALEN);
2338 /* FIX: IBSS mode */
2339 if (drv->nlmode != NL80211_IFTYPE_STATION)
2340 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2341
2342 if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2343 return -1;
2344
2345 retry:
2346 msg = nlmsg_alloc();
2347 if (!msg)
2348 return -1;
2349
2350 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2351 drv->ifindex);
2352
2353 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2354 NL80211_CMD_AUTHENTICATE, 0);
2355
2356 for (i = 0; i < 4; i++) {
2357 if (!params->wep_key[i])
2358 continue;
2359 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2360 NULL, i,
2361 i == params->wep_tx_keyidx, NULL, 0,
2362 params->wep_key[i],
2363 params->wep_key_len[i]);
2364 if (params->wep_tx_keyidx != i)
2365 continue;
2366 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2367 params->wep_key[i], params->wep_key_len[i])) {
2368 nlmsg_free(msg);
2369 return -1;
2370 }
2371 }
2372
2373 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2374 if (params->bssid) {
2375 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2376 MAC2STR(params->bssid));
2377 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2378 }
2379 if (params->freq) {
2380 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2381 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2382 }
2383 if (params->ssid) {
2384 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2385 params->ssid, params->ssid_len);
2386 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2387 params->ssid);
2388 }
2389 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
2390 if (params->ie)
2391 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2392 /*
2393 * TODO: if multiple auth_alg options enabled, try them one by one if
2394 * the AP rejects authentication due to unknown auth alg
2395 */
2396 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2397 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2398 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2399 type = NL80211_AUTHTYPE_SHARED_KEY;
2400 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2401 type = NL80211_AUTHTYPE_NETWORK_EAP;
2402 else if (params->auth_alg & WPA_AUTH_ALG_FT)
2403 type = NL80211_AUTHTYPE_FT;
2404 else
2405 goto nla_put_failure;
2406 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
2407 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2408 if (params->local_state_change) {
2409 wpa_printf(MSG_DEBUG, " * Local state change only");
2410 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2411 }
2412
2413 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2414 msg = NULL;
2415 if (ret) {
2416 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2417 "(%s)", ret, strerror(-ret));
2418 count++;
2419 if (ret == -EALREADY && count == 1 && params->bssid &&
2420 !params->local_state_change) {
2421 /*
2422 * mac80211 does not currently accept new
2423 * authentication if we are already authenticated. As a
2424 * workaround, force deauthentication and try again.
2425 */
2426 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2427 "after forced deauthentication");
2428 wpa_driver_nl80211_deauthenticate(
2429 bss, params->bssid,
2430 WLAN_REASON_PREV_AUTH_NOT_VALID);
2431 nlmsg_free(msg);
2432 goto retry;
2433 }
2434 goto nla_put_failure;
2435 }
2436 ret = 0;
2437 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2438 "successfully");
2439
2440 nla_put_failure:
2441 nlmsg_free(msg);
2442 return ret;
2443 }
2444
2445
2446 struct phy_info_arg {
2447 u16 *num_modes;
2448 struct hostapd_hw_modes *modes;
2449 };
2450
2451 static int phy_info_handler(struct nl_msg *msg, void *arg)
2452 {
2453 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2454 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2455 struct phy_info_arg *phy_info = arg;
2456
2457 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2458
2459 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2460 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2461 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2462 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2463 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2464 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2465 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2466 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2467 };
2468
2469 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2470 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2471 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2472 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2473 };
2474
2475 struct nlattr *nl_band;
2476 struct nlattr *nl_freq;
2477 struct nlattr *nl_rate;
2478 int rem_band, rem_freq, rem_rate;
2479 struct hostapd_hw_modes *mode;
2480 int idx, mode_is_set;
2481
2482 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2483 genlmsg_attrlen(gnlh, 0), NULL);
2484
2485 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2486 return NL_SKIP;
2487
2488 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2489 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2490 if (!mode)
2491 return NL_SKIP;
2492 phy_info->modes = mode;
2493
2494 mode_is_set = 0;
2495
2496 mode = &phy_info->modes[*(phy_info->num_modes)];
2497 memset(mode, 0, sizeof(*mode));
2498 *(phy_info->num_modes) += 1;
2499
2500 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2501 nla_len(nl_band), NULL);
2502
2503 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2504 mode->ht_capab = nla_get_u16(
2505 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2506 }
2507
2508 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2509 mode->a_mpdu_params |= nla_get_u8(
2510 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2511 0x03;
2512 }
2513
2514 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2515 mode->a_mpdu_params |= nla_get_u8(
2516 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2517 2;
2518 }
2519
2520 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2521 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2522 u8 *mcs;
2523 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2524 os_memcpy(mode->mcs_set, mcs, 16);
2525 }
2526
2527 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2528 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2529 nla_len(nl_freq), freq_policy);
2530 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2531 continue;
2532 mode->num_channels++;
2533 }
2534
2535 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2536 if (!mode->channels)
2537 return NL_SKIP;
2538
2539 idx = 0;
2540
2541 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2542 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2543 nla_len(nl_freq), freq_policy);
2544 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2545 continue;
2546
2547 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2548 mode->channels[idx].flag = 0;
2549
2550 if (!mode_is_set) {
2551 /* crude heuristic */
2552 if (mode->channels[idx].freq < 4000)
2553 mode->mode = HOSTAPD_MODE_IEEE80211B;
2554 else
2555 mode->mode = HOSTAPD_MODE_IEEE80211A;
2556 mode_is_set = 1;
2557 }
2558
2559 /* crude heuristic */
2560 if (mode->channels[idx].freq < 4000)
2561 if (mode->channels[idx].freq == 2484)
2562 mode->channels[idx].chan = 14;
2563 else
2564 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2565 else
2566 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2567
2568 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2569 mode->channels[idx].flag |=
2570 HOSTAPD_CHAN_DISABLED;
2571 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2572 mode->channels[idx].flag |=
2573 HOSTAPD_CHAN_PASSIVE_SCAN;
2574 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2575 mode->channels[idx].flag |=
2576 HOSTAPD_CHAN_NO_IBSS;
2577 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2578 mode->channels[idx].flag |=
2579 HOSTAPD_CHAN_RADAR;
2580
2581 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2582 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2583 mode->channels[idx].max_tx_power =
2584 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2585
2586 idx++;
2587 }
2588
2589 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2590 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2591 nla_len(nl_rate), rate_policy);
2592 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2593 continue;
2594 mode->num_rates++;
2595 }
2596
2597 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2598 if (!mode->rates)
2599 return NL_SKIP;
2600
2601 idx = 0;
2602
2603 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2604 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2605 nla_len(nl_rate), rate_policy);
2606 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2607 continue;
2608 mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2609
2610 /* crude heuristic */
2611 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2612 mode->rates[idx] > 200)
2613 mode->mode = HOSTAPD_MODE_IEEE80211G;
2614
2615 idx++;
2616 }
2617 }
2618
2619 return NL_SKIP;
2620 }
2621
2622 static struct hostapd_hw_modes *
2623 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2624 {
2625 u16 m;
2626 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2627 int i, mode11g_idx = -1;
2628
2629 /* If only 802.11g mode is included, use it to construct matching
2630 * 802.11b mode data. */
2631
2632 for (m = 0; m < *num_modes; m++) {
2633 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2634 return modes; /* 802.11b already included */
2635 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2636 mode11g_idx = m;
2637 }
2638
2639 if (mode11g_idx < 0)
2640 return modes; /* 2.4 GHz band not supported at all */
2641
2642 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2643 if (nmodes == NULL)
2644 return modes; /* Could not add 802.11b mode */
2645
2646 mode = &nmodes[*num_modes];
2647 os_memset(mode, 0, sizeof(*mode));
2648 (*num_modes)++;
2649 modes = nmodes;
2650
2651 mode->mode = HOSTAPD_MODE_IEEE80211B;
2652
2653 mode11g = &modes[mode11g_idx];
2654 mode->num_channels = mode11g->num_channels;
2655 mode->channels = os_malloc(mode11g->num_channels *
2656 sizeof(struct hostapd_channel_data));
2657 if (mode->channels == NULL) {
2658 (*num_modes)--;
2659 return modes; /* Could not add 802.11b mode */
2660 }
2661 os_memcpy(mode->channels, mode11g->channels,
2662 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2663
2664 mode->num_rates = 0;
2665 mode->rates = os_malloc(4 * sizeof(int));
2666 if (mode->rates == NULL) {
2667 os_free(mode->channels);
2668 (*num_modes)--;
2669 return modes; /* Could not add 802.11b mode */
2670 }
2671
2672 for (i = 0; i < mode11g->num_rates; i++) {
2673 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2674 mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2675 continue;
2676 mode->rates[mode->num_rates] = mode11g->rates[i];
2677 mode->num_rates++;
2678 if (mode->num_rates == 4)
2679 break;
2680 }
2681
2682 if (mode->num_rates == 0) {
2683 os_free(mode->channels);
2684 os_free(mode->rates);
2685 (*num_modes)--;
2686 return modes; /* No 802.11b rates */
2687 }
2688
2689 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2690 "information");
2691
2692 return modes;
2693 }
2694
2695
2696 static struct hostapd_hw_modes *
2697 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2698 {
2699 struct i802_bss *bss = priv;
2700 struct wpa_driver_nl80211_data *drv = bss->drv;
2701 struct nl_msg *msg;
2702 struct phy_info_arg result = {
2703 .num_modes = num_modes,
2704 .modes = NULL,
2705 };
2706
2707 *num_modes = 0;
2708 *flags = 0;
2709
2710 msg = nlmsg_alloc();
2711 if (!msg)
2712 return NULL;
2713
2714 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2715 0, NL80211_CMD_GET_WIPHY, 0);
2716
2717 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2718
2719 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2720 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2721 nla_put_failure:
2722 return NULL;
2723 }
2724
2725
2726 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2727 const void *data, size_t len,
2728 int encrypt)
2729 {
2730 __u8 rtap_hdr[] = {
2731 0x00, 0x00, /* radiotap version */
2732 0x0e, 0x00, /* radiotap length */
2733 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2734 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2735 0x00, /* padding */
2736 0x00, 0x00, /* RX and TX flags to indicate that */
2737 0x00, 0x00, /* this is the injected frame directly */
2738 };
2739 struct iovec iov[2] = {
2740 {
2741 .iov_base = &rtap_hdr,
2742 .iov_len = sizeof(rtap_hdr),
2743 },
2744 {
2745 .iov_base = (void *) data,
2746 .iov_len = len,
2747 }
2748 };
2749 struct msghdr msg = {
2750 .msg_name = NULL,
2751 .msg_namelen = 0,
2752 .msg_iov = iov,
2753 .msg_iovlen = 2,
2754 .msg_control = NULL,
2755 .msg_controllen = 0,
2756 .msg_flags = 0,
2757 };
2758
2759 if (encrypt)
2760 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2761
2762 return sendmsg(drv->monitor_sock, &msg, 0);
2763 }
2764
2765
2766 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2767 size_t data_len)
2768 {
2769 struct i802_bss *bss = priv;
2770 struct wpa_driver_nl80211_data *drv = bss->drv;
2771 struct ieee80211_mgmt *mgmt;
2772 int encrypt = 1;
2773 u16 fc;
2774
2775 mgmt = (struct ieee80211_mgmt *) data;
2776 fc = le_to_host16(mgmt->frame_control);
2777
2778 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2779 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2780 /*
2781 * Only one of the authentication frame types is encrypted.
2782 * In order for static WEP encryption to work properly (i.e.,
2783 * to not encrypt the frame), we need to tell mac80211 about
2784 * the frames that must not be encrypted.
2785 */
2786 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2787 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2788 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2789 encrypt = 0;
2790 }
2791
2792 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2793 }
2794
2795
2796 static int wpa_driver_nl80211_set_beacon(void *priv,
2797 const u8 *head, size_t head_len,
2798 const u8 *tail, size_t tail_len,
2799 int dtim_period, int beacon_int)
2800 {
2801 struct i802_bss *bss = priv;
2802 struct wpa_driver_nl80211_data *drv = bss->drv;
2803 struct nl_msg *msg;
2804 u8 cmd = NL80211_CMD_NEW_BEACON;
2805 int ret;
2806 int beacon_set;
2807 int ifindex = if_nametoindex(bss->ifname);
2808
2809 beacon_set = bss->beacon_set;
2810
2811 msg = nlmsg_alloc();
2812 if (!msg)
2813 return -ENOMEM;
2814
2815 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2816 beacon_set);
2817 if (beacon_set)
2818 cmd = NL80211_CMD_SET_BEACON;
2819
2820 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2821 0, cmd, 0);
2822 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2823 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2824 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2825 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2826 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2827
2828 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2829 if (ret) {
2830 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2831 ret, strerror(-ret));
2832 } else {
2833 bss->beacon_set = 1;
2834 }
2835 return ret;
2836 nla_put_failure:
2837 return -ENOBUFS;
2838 }
2839
2840
2841 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2842 int freq, int ht_enabled,
2843 int sec_channel_offset)
2844 {
2845 struct nl_msg *msg;
2846 int ret;
2847
2848 msg = nlmsg_alloc();
2849 if (!msg)
2850 return -1;
2851
2852 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2853 NL80211_CMD_SET_WIPHY, 0);
2854
2855 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2856 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2857 if (ht_enabled) {
2858 switch (sec_channel_offset) {
2859 case -1:
2860 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2861 NL80211_CHAN_HT40MINUS);
2862 break;
2863 case 1:
2864 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2865 NL80211_CHAN_HT40PLUS);
2866 break;
2867 default:
2868 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2869 NL80211_CHAN_HT20);
2870 break;
2871 }
2872 }
2873
2874 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2875 if (ret == 0)
2876 return 0;
2877 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2878 "%d (%s)", freq, ret, strerror(-ret));
2879 nla_put_failure:
2880 return -1;
2881 }
2882
2883
2884 static int wpa_driver_nl80211_sta_add(void *priv,
2885 struct hostapd_sta_add_params *params)
2886 {
2887 struct i802_bss *bss = priv;
2888 struct wpa_driver_nl80211_data *drv = bss->drv;
2889 struct nl_msg *msg;
2890 int ret = -ENOBUFS;
2891
2892 msg = nlmsg_alloc();
2893 if (!msg)
2894 return -ENOMEM;
2895
2896 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2897 0, NL80211_CMD_NEW_STATION, 0);
2898
2899 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
2900 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2901 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2902 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2903 params->supp_rates);
2904 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2905 params->listen_interval);
2906 if (params->ht_capabilities) {
2907 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2908 sizeof(*params->ht_capabilities),
2909 params->ht_capabilities);
2910 }
2911
2912 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2913 if (ret)
2914 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2915 "result: %d (%s)", ret, strerror(-ret));
2916 if (ret == -EEXIST)
2917 ret = 0;
2918 nla_put_failure:
2919 return ret;
2920 }
2921
2922
2923 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2924 {
2925 struct i802_bss *bss = priv;
2926 struct wpa_driver_nl80211_data *drv = bss->drv;
2927 struct nl_msg *msg;
2928 int ret;
2929
2930 msg = nlmsg_alloc();
2931 if (!msg)
2932 return -ENOMEM;
2933
2934 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2935 0, NL80211_CMD_DEL_STATION, 0);
2936
2937 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2938 if_nametoindex(bss->ifname));
2939 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2940
2941 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2942 if (ret == -ENOENT)
2943 return 0;
2944 return ret;
2945 nla_put_failure:
2946 return -ENOBUFS;
2947 }
2948
2949
2950 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2951 int ifidx)
2952 {
2953 struct nl_msg *msg;
2954
2955 wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2956
2957 #ifdef HOSTAPD
2958 /* stop listening for EAPOL on this interface */
2959 del_ifidx(drv, ifidx);
2960 #endif /* HOSTAPD */
2961
2962 msg = nlmsg_alloc();
2963 if (!msg)
2964 goto nla_put_failure;
2965
2966 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2967 0, NL80211_CMD_DEL_INTERFACE, 0);
2968 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2969
2970 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2971 return;
2972 nla_put_failure:
2973 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
2974 }
2975
2976
2977 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2978 const char *ifname,
2979 enum nl80211_iftype iftype,
2980 const u8 *addr, int wds)
2981 {
2982 struct nl_msg *msg, *flags = NULL;
2983 int ifidx;
2984 int ret = -ENOBUFS;
2985
2986 msg = nlmsg_alloc();
2987 if (!msg)
2988 return -1;
2989
2990 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2991 0, NL80211_CMD_NEW_INTERFACE, 0);
2992 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2993 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2994 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2995
2996 if (iftype == NL80211_IFTYPE_MONITOR) {
2997 int err;
2998
2999 flags = nlmsg_alloc();
3000 if (!flags)
3001 goto nla_put_failure;
3002
3003 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3004
3005 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3006
3007 nlmsg_free(flags);
3008
3009 if (err)
3010 goto nla_put_failure;
3011 } else if (wds) {
3012 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3013 }
3014
3015 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3016 if (ret) {
3017 nla_put_failure:
3018 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3019 ifname, ret, strerror(-ret));
3020 return ret;
3021 }
3022
3023 ifidx = if_nametoindex(ifname);
3024 wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3025 ifname, ifidx);
3026
3027 if (ifidx <= 0)
3028 return -1;
3029
3030 #ifdef HOSTAPD
3031 /* start listening for EAPOL on this interface */
3032 add_ifidx(drv, ifidx);
3033 #endif /* HOSTAPD */
3034
3035 if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3036 linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3037 nl80211_remove_iface(drv, ifidx);
3038 return -1;
3039 }
3040
3041 return ifidx;
3042 }
3043
3044
3045 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3046 const char *ifname, enum nl80211_iftype iftype,
3047 const u8 *addr, int wds)
3048 {
3049 int ret;
3050
3051 ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3052
3053 /* if error occured and interface exists already */
3054 if (ret == -ENFILE && if_nametoindex(ifname)) {
3055 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3056
3057 /* Try to remove the interface that was already there. */
3058 nl80211_remove_iface(drv, if_nametoindex(ifname));
3059
3060 /* Try to create the interface again */
3061 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3062 wds);
3063 }
3064
3065 if (ret >= 0 && drv->disable_11b_rates)
3066 nl80211_disable_11b_rates(drv, ret, 1);
3067
3068 return ret;
3069 }
3070
3071
3072 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3073 {
3074 struct ieee80211_hdr *hdr;
3075 u16 fc;
3076 union wpa_event_data event;
3077
3078 hdr = (struct ieee80211_hdr *) buf;
3079 fc = le_to_host16(hdr->frame_control);
3080
3081 os_memset(&event, 0, sizeof(event));
3082 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3083 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3084 event.tx_status.dst = hdr->addr1;
3085 event.tx_status.data = buf;
3086 event.tx_status.data_len = len;
3087 event.tx_status.ack = ok;
3088 wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3089 }
3090
3091
3092 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3093 u8 *buf, size_t len)
3094 {
3095 union wpa_event_data event;
3096 os_memset(&event, 0, sizeof(event));
3097 event.rx_from_unknown.frame = buf;
3098 event.rx_from_unknown.len = len;
3099 wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3100 }
3101
3102
3103 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3104 u8 *buf, size_t len, int datarate, int ssi_signal)
3105 {
3106 struct ieee80211_hdr *hdr;
3107 u16 fc;
3108 union wpa_event_data event;
3109
3110 hdr = (struct ieee80211_hdr *) buf;
3111 fc = le_to_host16(hdr->frame_control);
3112
3113 switch (WLAN_FC_GET_TYPE(fc)) {
3114 case WLAN_FC_TYPE_MGMT:
3115 os_memset(&event, 0, sizeof(event));
3116 event.rx_mgmt.frame = buf;
3117 event.rx_mgmt.frame_len = len;
3118 event.rx_mgmt.datarate = datarate;
3119 event.rx_mgmt.ssi_signal = ssi_signal;
3120 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3121 break;
3122 case WLAN_FC_TYPE_CTRL:
3123 /* can only get here with PS-Poll frames */
3124 wpa_printf(MSG_DEBUG, "CTRL");
3125 from_unknown_sta(drv, buf, len);
3126 break;
3127 case WLAN_FC_TYPE_DATA:
3128 from_unknown_sta(drv, buf, len);
3129 break;
3130 }
3131 }
3132
3133
3134 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3135 {
3136 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3137 int len;
3138 unsigned char buf[3000];
3139 struct ieee80211_radiotap_iterator iter;
3140 int ret;
3141 int datarate = 0, ssi_signal = 0;
3142 int injected = 0, failed = 0, rxflags = 0;
3143
3144 len = recv(sock, buf, sizeof(buf), 0);
3145 if (len < 0) {
3146 perror("recv");
3147 return;
3148 }
3149
3150 if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3151 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3152 "frame since Probe Request reporting is disabled");
3153 return;
3154 }
3155
3156 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3157 printf("received invalid radiotap frame\n");
3158 return;
3159 }
3160
3161 while (1) {
3162 ret = ieee80211_radiotap_iterator_next(&iter);
3163 if (ret == -ENOENT)
3164 break;
3165 if (ret) {
3166 printf("received invalid radiotap frame (%d)\n", ret);
3167 return;
3168 }
3169 switch (iter.this_arg_index) {
3170 case IEEE80211_RADIOTAP_FLAGS:
3171 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3172 len -= 4;
3173 break;
3174 case IEEE80211_RADIOTAP_RX_FLAGS:
3175 rxflags = 1;
3176 break;
3177 case IEEE80211_RADIOTAP_TX_FLAGS:
3178 injected = 1;
3179 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3180 IEEE80211_RADIOTAP_F_TX_FAIL;
3181 break;
3182 case IEEE80211_RADIOTAP_DATA_RETRIES:
3183 break;
3184 case IEEE80211_RADIOTAP_CHANNEL:
3185 /* TODO: convert from freq/flags to channel number */
3186 break;
3187 case IEEE80211_RADIOTAP_RATE:
3188 datarate = *iter.this_arg * 5;
3189 break;
3190 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3191 ssi_signal = *iter.this_arg;
3192 break;
3193 }
3194 }
3195
3196 if (rxflags && injected)
3197 return;
3198
3199 if (!injected)
3200 handle_frame(drv, buf + iter.max_length,
3201 len - iter.max_length, datarate, ssi_signal);
3202 else
3203 handle_tx_callback(drv->ctx, buf + iter.max_length,
3204 len - iter.max_length, !failed);
3205 }
3206
3207
3208 /*
3209 * we post-process the filter code later and rewrite
3210 * this to the offset to the last instruction
3211 */
3212 #define PASS 0xFF
3213 #define FAIL 0xFE
3214
3215 static struct sock_filter msock_filter_insns[] = {
3216 /*
3217 * do a little-endian load of the radiotap length field
3218 */
3219 /* load lower byte into A */
3220 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
3221 /* put it into X (== index register) */
3222 BPF_STMT(BPF_MISC| BPF_TAX, 0),
3223 /* load upper byte into A */
3224 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
3225 /* left-shift it by 8 */
3226 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3227 /* or with X */
3228 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3229 /* put result into X */
3230 BPF_STMT(BPF_MISC| BPF_TAX, 0),
3231
3232 /*
3233 * Allow management frames through, this also gives us those
3234 * management frames that we sent ourselves with status
3235 */
3236 /* load the lower byte of the IEEE 802.11 frame control field */
3237 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3238 /* mask off frame type and version */
3239 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3240 /* accept frame if it's both 0, fall through otherwise */
3241 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3242
3243 /*
3244 * TODO: add a bit to radiotap RX flags that indicates
3245 * that the sending station is not associated, then
3246 * add a filter here that filters on our DA and that flag
3247 * to allow us to deauth frames to that bad station.
3248 *
3249 * Not a regression -- we didn't do it before either.
3250 */
3251
3252 #if 0
3253 /*
3254 * drop non-data frames
3255 */
3256 /* load the lower byte of the frame control field */
3257 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3258 /* mask off QoS bit */
3259 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
3260 /* drop non-data frames */
3261 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
3262 #endif
3263 /* load the upper byte of the frame control field */
3264 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
3265 /* mask off toDS/fromDS */
3266 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
3267 /* accept WDS frames */
3268 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, PASS, 0),
3269
3270 /*
3271 * add header length to index
3272 */
3273 /* load the lower byte of the frame control field */
3274 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
3275 /* mask off QoS bit */
3276 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
3277 /* right shift it by 6 to give 0 or 2 */
3278 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
3279 /* add data frame header length */
3280 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
3281 /* add index, was start of 802.11 header */
3282 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
3283 /* move to index, now start of LL header */
3284 BPF_STMT(BPF_MISC | BPF_TAX, 0),
3285
3286 /*
3287 * Accept empty data frames, we use those for
3288 * polling activity.
3289 */
3290 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
3291 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3292
3293 /*
3294 * Accept EAPOL frames
3295 */
3296 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
3297 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3298 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
3299 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3300
3301 /* keep these last two statements or change the code below */
3302 /* return 0 == "DROP" */
3303 BPF_STMT(BPF_RET | BPF_K, 0),
3304 /* return ~0 == "keep all" */
3305 BPF_STMT(BPF_RET | BPF_K, ~0),
3306 };
3307
3308 static struct sock_fprog msock_filter = {
3309 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3310 .filter = msock_filter_insns,
3311 };
3312
3313
3314 static int add_monitor_filter(int s)
3315 {
3316 int idx;
3317
3318 /* rewrite all PASS/FAIL jump offsets */
3319 for (idx = 0; idx < msock_filter.len; idx++) {
3320 struct sock_filter *insn = &msock_filter_insns[idx];
3321
3322 if (BPF_CLASS(insn->code) == BPF_JMP) {
3323 if (insn->code == (BPF_JMP|BPF_JA)) {
3324 if (insn->k == PASS)
3325 insn->k = msock_filter.len - idx - 2;
3326 else if (insn->k == FAIL)
3327 insn->k = msock_filter.len - idx - 3;
3328 }
3329
3330 if (insn->jt == PASS)
3331 insn->jt = msock_filter.len - idx - 2;
3332 else if (insn->jt == FAIL)
3333 insn->jt = msock_filter.len - idx - 3;
3334
3335 if (insn->jf == PASS)
3336 insn->jf = msock_filter.len - idx - 2;
3337 else if (insn->jf == FAIL)
3338 insn->jf = msock_filter.len - idx - 3;
3339 }
3340 }
3341
3342 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3343 &msock_filter, sizeof(msock_filter))) {
3344 perror("SO_ATTACH_FILTER");
3345 return -1;
3346 }
3347
3348 return 0;
3349 }
3350
3351
3352 static void nl80211_remove_monitor_interface(
3353 struct wpa_driver_nl80211_data *drv)
3354 {
3355 if (drv->monitor_ifidx >= 0) {
3356 nl80211_remove_iface(drv, drv->monitor_ifidx);
3357 drv->monitor_ifidx = -1;
3358 }
3359 if (drv->monitor_sock >= 0) {
3360 eloop_unregister_read_sock(drv->monitor_sock);
3361 close(drv->monitor_sock);
3362 drv->monitor_sock = -1;
3363 }
3364 }
3365
3366
3367 static int
3368 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3369 {
3370 char buf[IFNAMSIZ];
3371 struct sockaddr_ll ll;
3372 int optval;
3373 socklen_t optlen;
3374
3375 snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3376 buf[IFNAMSIZ - 1] = '\0';
3377
3378 drv->monitor_ifidx =
3379 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3380 0);
3381
3382 if (drv->monitor_ifidx < 0)
3383 return -1;
3384
3385 if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3386 goto error;
3387
3388 memset(&ll, 0, sizeof(ll));
3389 ll.sll_family = AF_PACKET;
3390 ll.sll_ifindex = drv->monitor_ifidx;
3391 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3392 if (drv->monitor_sock < 0) {
3393 perror("socket[PF_PACKET,SOCK_RAW]");
3394 goto error;
3395 }
3396
3397 if (add_monitor_filter(drv->monitor_sock)) {
3398 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3399 "interface; do filtering in user space");
3400 /* This works, but will cost in performance. */
3401 }
3402
3403 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3404 perror("monitor socket bind");
3405 goto error;
3406 }
3407
3408 optlen = sizeof(optval);
3409 optval = 20;
3410 if (setsockopt
3411 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3412 perror("Failed to set socket priority");
3413 goto error;
3414 }
3415
3416 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3417 drv, NULL)) {
3418 printf("Could not register monitor read socket\n");
3419 goto error;
3420 }
3421
3422 return 0;
3423 error:
3424 nl80211_remove_monitor_interface(drv);
3425 return -1;
3426 }
3427
3428
3429 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3430
3431 static int wpa_driver_nl80211_hapd_send_eapol(
3432 void *priv, const u8 *addr, const u8 *data,
3433 size_t data_len, int encrypt, const u8 *own_addr)
3434 {
3435 struct i802_bss *bss = priv;
3436 struct wpa_driver_nl80211_data *drv = bss->drv;
3437 struct ieee80211_hdr *hdr;
3438 size_t len;
3439 u8 *pos;
3440 int res;
3441 #if 0 /* FIX */
3442 int qos = sta->flags & WPA_STA_WMM;
3443 #else
3444 int qos = 0;
3445 #endif
3446
3447 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3448 data_len;
3449 hdr = os_zalloc(len);
3450 if (hdr == NULL) {
3451 printf("malloc() failed for i802_send_data(len=%lu)\n",
3452 (unsigned long) len);
3453 return -1;
3454 }
3455
3456 hdr->frame_control =
3457 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3458 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3459 if (encrypt)
3460 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3461 #if 0 /* To be enabled if qos determination is added above */
3462 if (qos) {
3463 hdr->frame_control |=
3464 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3465 }
3466 #endif
3467
3468 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3469 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3470 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3471 pos = (u8 *) (hdr + 1);
3472
3473 #if 0 /* To be enabled if qos determination is added above */
3474 if (qos) {
3475 /* add an empty QoS header if needed */
3476 pos[0] = 0;
3477 pos[1] = 0;
3478 pos += 2;
3479 }
3480 #endif
3481
3482 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3483 pos += sizeof(rfc1042_header);
3484 WPA_PUT_BE16(pos, ETH_P_PAE);
3485 pos += 2;
3486 memcpy(pos, data, data_len);
3487
3488 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3489 if (res < 0) {
3490 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3491 "failed: %d (%s)",
3492 (unsigned long) len, errno, strerror(errno));
3493 }
3494 os_free(hdr);
3495
3496 return res;
3497 }
3498
3499
3500 static u32 sta_flags_nl80211(int flags)
3501 {
3502 u32 f = 0;
3503
3504 if (flags & WPA_STA_AUTHORIZED)
3505 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3506 if (flags & WPA_STA_WMM)
3507 f |= BIT(NL80211_STA_FLAG_WME);
3508 if (flags & WPA_STA_SHORT_PREAMBLE)
3509 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3510 if (flags & WPA_STA_MFP)
3511 f |= BIT(NL80211_STA_FLAG_MFP);
3512
3513 return f;
3514 }
3515
3516
3517 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3518 int total_flags,
3519 int flags_or, int flags_and)
3520 {
3521 struct i802_bss *bss = priv;
3522 struct wpa_driver_nl80211_data *drv = bss->drv;
3523 struct nl_msg *msg, *flags = NULL;
3524 struct nl80211_sta_flag_update upd;
3525
3526 msg = nlmsg_alloc();
3527 if (!msg)
3528 return -ENOMEM;
3529
3530 flags = nlmsg_alloc();
3531 if (!flags) {
3532 nlmsg_free(msg);
3533 return -ENOMEM;
3534 }
3535
3536 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3537 0, NL80211_CMD_SET_STATION, 0);
3538
3539 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3540 if_nametoindex(bss->ifname));
3541 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3542
3543 /*
3544 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3545 * can be removed eventually.
3546 */
3547 if (total_flags & WPA_STA_AUTHORIZED)
3548 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3549
3550 if (total_flags & WPA_STA_WMM)
3551 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3552
3553 if (total_flags & WPA_STA_SHORT_PREAMBLE)
3554 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3555
3556 if (total_flags & WPA_STA_MFP)
3557 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3558
3559 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3560 goto nla_put_failure;
3561
3562 os_memset(&upd, 0, sizeof(upd));
3563 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3564 upd.set = sta_flags_nl80211(flags_or);
3565 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3566
3567 nlmsg_free(flags);
3568
3569 return send_and_recv_msgs(drv, msg, NULL, NULL);
3570 nla_put_failure:
3571 nlmsg_free(flags);
3572 return -ENOBUFS;
3573 }
3574
3575
3576 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3577 struct wpa_driver_associate_params *params)
3578 {
3579 if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3580 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3581 nl80211_remove_monitor_interface(drv);
3582 return -1;
3583 }
3584
3585 /* TODO: setup monitor interface (and add code somewhere to remove this
3586 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3587
3588 return 0;
3589 }
3590
3591
3592 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3593 {
3594 struct nl_msg *msg;
3595 int ret = -1;
3596
3597 msg = nlmsg_alloc();
3598 if (!msg)
3599 return -1;
3600
3601 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3602 NL80211_CMD_LEAVE_IBSS, 0);
3603 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3604 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3605 msg = NULL;
3606 if (ret) {
3607 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3608 "(%s)", ret, strerror(-ret));
3609 goto nla_put_failure;
3610 }
3611
3612 ret = 0;
3613 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3614
3615 nla_put_failure:
3616 nlmsg_free(msg);
3617 return ret;
3618 }
3619
3620
3621 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3622 struct wpa_driver_associate_params *params)
3623 {
3624 struct nl_msg *msg;
3625 int ret = -1;
3626 int count = 0;
3627
3628 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3629
3630 if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3631 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3632 "IBSS mode");
3633 return -1;
3634 }
3635
3636 retry:
3637 msg = nlmsg_alloc();
3638 if (!msg)
3639 return -1;
3640
3641 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3642 NL80211_CMD_JOIN_IBSS, 0);
3643 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3644
3645 if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3646 goto nla_put_failure;
3647
3648 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3649 params->ssid, params->ssid_len);
3650 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3651 params->ssid);
3652 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3653 drv->ssid_len = params->ssid_len;
3654
3655 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3656 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3657
3658 ret = nl80211_set_conn_keys(params, msg);
3659 if (ret)
3660 goto nla_put_failure;
3661
3662 if (params->wpa_ie) {
3663 wpa_hexdump(MSG_DEBUG,
3664 " * Extra IEs for Beacon/Probe Response frames",
3665 params->wpa_ie, params->wpa_ie_len);
3666 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3667 params->wpa_ie);
3668 }
3669
3670 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3671 msg = NULL;
3672 if (ret) {
3673 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3674 ret, strerror(-ret));
3675 count++;
3676 if (ret == -EALREADY && count == 1) {
3677 wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3678 "forced leave");
3679 nl80211_leave_ibss(drv);
3680 nlmsg_free(msg);
3681 goto retry;
3682 }
3683
3684 goto nla_put_failure;
3685 }
3686 ret = 0;
3687 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3688
3689 nla_put_failure:
3690 nlmsg_free(msg);
3691 return ret;
3692 }
3693
3694
3695 static int wpa_driver_nl80211_connect(
3696 struct wpa_driver_nl80211_data *drv,
3697 struct wpa_driver_associate_params *params)
3698 {
3699 struct nl_msg *msg;
3700 enum nl80211_auth_type type;
3701 int ret = 0;
3702
3703 msg = nlmsg_alloc();
3704 if (!msg)
3705 return -1;
3706
3707 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3708 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3709 NL80211_CMD_CONNECT, 0);
3710
3711 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3712 if (params->bssid) {
3713 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3714 MAC2STR(params->bssid));
3715 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3716 }
3717 if (params->freq) {
3718 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3719 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3720 }
3721 if (params->ssid) {
3722 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3723 params->ssid, params->ssid_len);
3724 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3725 params->ssid);
3726 if (params->ssid_len > sizeof(drv->ssid))
3727 goto nla_put_failure;
3728 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3729 drv->ssid_len = params->ssid_len;
3730 }
3731 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3732 if (params->wpa_ie)
3733 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3734 params->wpa_ie);
3735
3736 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3737 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3738 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3739 type = NL80211_AUTHTYPE_SHARED_KEY;
3740 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3741 type = NL80211_AUTHTYPE_NETWORK_EAP;
3742 else if (params->auth_alg & WPA_AUTH_ALG_FT)
3743 type = NL80211_AUTHTYPE_FT;
3744 else
3745 goto nla_put_failure;
3746
3747 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3748 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3749
3750 if (params->wpa_ie && params->wpa_ie_len) {
3751 enum nl80211_wpa_versions ver;
3752
3753 if (params->wpa_ie[0] == WLAN_EID_RSN)
3754 ver = NL80211_WPA_VERSION_2;
3755 else
3756 ver = NL80211_WPA_VERSION_1;
3757
3758 wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
3759 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3760 }
3761
3762 if (params->pairwise_suite != CIPHER_NONE) {
3763 int cipher;
3764
3765 switch (params->pairwise_suite) {
3766 case CIPHER_WEP40:
3767 cipher = WLAN_CIPHER_SUITE_WEP40;
3768 break;
3769 case CIPHER_WEP104:
3770 cipher = WLAN_CIPHER_SUITE_WEP104;
3771 break;
3772 case CIPHER_CCMP:
3773 cipher = WLAN_CIPHER_SUITE_CCMP;
3774 break;
3775 case CIPHER_TKIP:
3776 default:
3777 cipher = WLAN_CIPHER_SUITE_TKIP;
3778 break;
3779 }
3780 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3781 }
3782
3783 if (params->group_suite != CIPHER_NONE) {
3784 int cipher;
3785
3786 switch (params->group_suite) {
3787 case CIPHER_WEP40:
3788 cipher = WLAN_CIPHER_SUITE_WEP40;
3789 break;
3790 case CIPHER_WEP104:
3791 cipher = WLAN_CIPHER_SUITE_WEP104;
3792 break;
3793 case CIPHER_CCMP:
3794 cipher = WLAN_CIPHER_SUITE_CCMP;
3795 break;
3796 case CIPHER_TKIP:
3797 default:
3798 cipher = WLAN_CIPHER_SUITE_TKIP;
3799 break;
3800 }
3801 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3802 }
3803
3804 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3805 params->key_mgmt_suite == KEY_MGMT_PSK) {
3806 int mgmt = WLAN_AKM_SUITE_PSK;
3807
3808 switch (params->key_mgmt_suite) {
3809 case KEY_MGMT_802_1X:
3810 mgmt = WLAN_AKM_SUITE_8021X;
3811 break;
3812 case KEY_MGMT_PSK:
3813 default:
3814 mgmt = WLAN_AKM_SUITE_PSK;
3815 break;
3816 }
3817 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3818 }
3819
3820 ret = nl80211_set_conn_keys(params, msg);
3821 if (ret)
3822 goto nla_put_failure;
3823
3824 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3825 msg = NULL;
3826 if (ret) {
3827 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3828 "(%s)", ret, strerror(-ret));
3829 goto nla_put_failure;
3830 }
3831 ret = 0;
3832 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3833
3834 nla_put_failure:
3835 nlmsg_free(msg);
3836 return ret;
3837
3838 }
3839
3840
3841 static int wpa_driver_nl80211_associate(
3842 void *priv, struct wpa_driver_associate_params *params)
3843 {
3844 struct i802_bss *bss = priv;
3845 struct wpa_driver_nl80211_data *drv = bss->drv;
3846 int ret = -1;
3847 struct nl_msg *msg;
3848
3849 if (params->mode == IEEE80211_MODE_AP)
3850 return wpa_driver_nl80211_ap(drv, params);
3851
3852 if (params->mode == IEEE80211_MODE_IBSS)
3853 return wpa_driver_nl80211_ibss(drv, params);
3854
3855 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3856 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
3857 return -1;
3858 return wpa_driver_nl80211_connect(drv, params);
3859 }
3860
3861 drv->associated = 0;
3862
3863 msg = nlmsg_alloc();
3864 if (!msg)
3865 return -1;
3866
3867 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3868 drv->ifindex);
3869 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3870 NL80211_CMD_ASSOCIATE, 0);
3871
3872 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3873 if (params->bssid) {
3874 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3875 MAC2STR(params->bssid));
3876 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3877 }
3878 if (params->freq) {
3879 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3880 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3881 drv->assoc_freq = params->freq;
3882 } else
3883 drv->assoc_freq = 0;
3884 if (params->ssid) {
3885 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3886 params->ssid, params->ssid_len);
3887 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3888 params->ssid);
3889 if (params->ssid_len > sizeof(drv->ssid))
3890 goto nla_put_failure;
3891 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3892 drv->ssid_len = params->ssid_len;
3893 }
3894 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3895 if (params->wpa_ie)
3896 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3897 params->wpa_ie);
3898
3899 #ifdef CONFIG_IEEE80211W
3900 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3901 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3902 #endif /* CONFIG_IEEE80211W */
3903
3904 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3905
3906 if (params->prev_bssid) {
3907 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
3908 MAC2STR(params->prev_bssid));
3909 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3910 params->prev_bssid);
3911 }
3912
3913 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3914 msg = NULL;
3915 if (ret) {
3916 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3917 "(%s)", ret, strerror(-ret));
3918 nl80211_dump_scan(drv);
3919 goto nla_put_failure;
3920 }
3921 ret = 0;
3922 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3923 "successfully");
3924
3925 nla_put_failure:
3926 nlmsg_free(msg);
3927 return ret;
3928 }
3929
3930
3931 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3932 int ifindex, int mode)
3933 {
3934 struct nl_msg *msg;
3935 int ret = -ENOBUFS;
3936
3937 msg = nlmsg_alloc();
3938 if (!msg)
3939 return -ENOMEM;
3940
3941 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3942 0, NL80211_CMD_SET_INTERFACE, 0);
3943 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3944 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3945
3946 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3947 if (!ret)
3948 return 0;
3949 nla_put_failure:
3950 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3951 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3952 return ret;
3953 }
3954
3955
3956 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3957 {
3958 struct i802_bss *bss = priv;
3959 struct wpa_driver_nl80211_data *drv = bss->drv;
3960 int ret = -1;
3961 int nlmode;
3962
3963 switch (mode) {
3964 case 0:
3965 nlmode = NL80211_IFTYPE_STATION;
3966 break;
3967 case 1:
3968 nlmode = NL80211_IFTYPE_ADHOC;
3969 break;
3970 case 2:
3971 nlmode = NL80211_IFTYPE_AP;
3972 break;
3973 default:
3974 return -1;
3975 }
3976
3977 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3978 drv->nlmode = nlmode;
3979 ret = 0;
3980 goto done;
3981 }
3982
3983 if (nlmode == drv->nlmode) {
3984 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3985 "requested mode - ignore error");
3986 ret = 0;
3987 goto done; /* Already in the requested mode */
3988 }
3989
3990 /* mac80211 doesn't allow mode changes while the device is up, so
3991 * take the device down, try to set the mode again, and bring the
3992 * device back up.
3993 */
3994 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == 0) {
3995 /* Try to set the mode again while the interface is down */
3996 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3997 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
3998 ret = -1;
3999 }
4000
4001 if (!ret) {
4002 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4003 "interface is down");
4004 drv->nlmode = nlmode;
4005 }
4006
4007 done:
4008 if (!ret && nlmode == NL80211_IFTYPE_AP) {
4009 /* Setup additional AP mode functionality if needed */
4010 if (drv->monitor_ifidx < 0 &&
4011 nl80211_create_monitor_interface(drv))
4012 return -1;
4013 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4014 /* Remove additional AP mode functionality */
4015 nl80211_remove_monitor_interface(drv);
4016 bss->beacon_set = 0;
4017 }
4018
4019 if (ret)
4020 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4021 "from %d failed", nlmode, drv->nlmode);
4022
4023 return ret;
4024 }
4025
4026
4027 static int wpa_driver_nl80211_get_capa(void *priv,
4028 struct wpa_driver_capa *capa)
4029 {
4030 struct i802_bss *bss = priv;
4031 struct wpa_driver_nl80211_data *drv = bss->drv;
4032 if (!drv->has_capability)
4033 return -1;
4034 os_memcpy(capa, &drv->capa, sizeof(*capa));
4035 return 0;
4036 }
4037
4038
4039 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4040 {
4041 struct i802_bss *bss = priv;
4042 struct wpa_driver_nl80211_data *drv = bss->drv;
4043
4044 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4045 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4046 drv->operstate = state;
4047 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4048 state ? IF_OPER_UP : IF_OPER_DORMANT);
4049 }
4050
4051
4052 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4053 {
4054 struct i802_bss *bss = priv;
4055 struct wpa_driver_nl80211_data *drv = bss->drv;
4056 struct nl_msg *msg;
4057 struct nl80211_sta_flag_update upd;
4058
4059 msg = nlmsg_alloc();
4060 if (!msg)
4061 return -ENOMEM;
4062
4063 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4064 0, NL80211_CMD_SET_STATION, 0);
4065
4066 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4067 if_nametoindex(bss->ifname));
4068 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4069
4070 os_memset(&upd, 0, sizeof(upd));
4071 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4072 if (authorized)
4073 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4074 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4075
4076 return send_and_recv_msgs(drv, msg, NULL, NULL);
4077 nla_put_failure:
4078 return -ENOBUFS;
4079 }
4080
4081
4082 #ifdef HOSTAPD
4083
4084 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4085 {
4086 int i;
4087 int *old;
4088
4089 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4090 ifidx);
4091 for (i = 0; i < drv->num_if_indices; i++) {
4092 if (drv->if_indices[i] == 0) {
4093 drv->if_indices[i] = ifidx;
4094 return;
4095 }
4096 }
4097
4098 if (drv->if_indices != drv->default_if_indices)
4099 old = drv->if_indices;
4100 else
4101 old = NULL;
4102
4103 drv->if_indices = os_realloc(old,
4104 sizeof(int) * (drv->num_if_indices + 1));
4105 if (!drv->if_indices) {
4106 if (!old)
4107 drv->if_indices = drv->default_if_indices;
4108 else
4109 drv->if_indices = old;
4110 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4111 "interfaces");
4112 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4113 return;
4114 }
4115 drv->if_indices[drv->num_if_indices] = ifidx;
4116 drv->num_if_indices++;
4117 }
4118
4119
4120 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4121 {
4122 int i;
4123
4124 for (i = 0; i < drv->num_if_indices; i++) {
4125 if (drv->if_indices[i] == ifidx) {
4126 drv->if_indices[i] = 0;
4127 break;
4128 }
4129 }
4130 }
4131
4132
4133 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4134 {
4135 int i;
4136
4137 for (i = 0; i < drv->num_if_indices; i++)
4138 if (drv->if_indices[i] == ifidx)
4139 return 1;
4140
4141 return 0;
4142 }
4143
4144
4145 static inline int min_int(int a, int b)
4146 {
4147 if (a < b)
4148 return a;
4149 return b;
4150 }
4151
4152
4153 static int get_key_handler(struct nl_msg *msg, void *arg)
4154 {
4155 struct nlattr *tb[NL80211_ATTR_MAX + 1];
4156 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4157
4158 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4159 genlmsg_attrlen(gnlh, 0), NULL);
4160
4161 /*
4162 * TODO: validate the key index and mac address!
4163 * Otherwise, there's a race condition as soon as
4164 * the kernel starts sending key notifications.
4165 */
4166
4167 if (tb[NL80211_ATTR_KEY_SEQ])
4168 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4169 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4170 return NL_SKIP;
4171 }
4172
4173
4174 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4175 int idx, u8 *seq)
4176 {
4177 struct i802_bss *bss = priv;
4178 struct wpa_driver_nl80211_data *drv = bss->drv;
4179 struct nl_msg *msg;
4180
4181 msg = nlmsg_alloc();
4182 if (!msg)
4183 return -ENOMEM;
4184
4185 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4186 0, NL80211_CMD_GET_KEY, 0);
4187
4188 if (addr)
4189 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4190 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4191 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4192
4193 memset(seq, 0, 6);
4194
4195 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4196 nla_put_failure:
4197 return -ENOBUFS;
4198 }
4199
4200
4201 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4202 int mode)
4203 {
4204 struct i802_bss *bss = priv;
4205 struct wpa_driver_nl80211_data *drv = bss->drv;
4206 struct nl_msg *msg;
4207 u8 rates[NL80211_MAX_SUPP_RATES];
4208 u8 rates_len = 0;
4209 int i;
4210
4211 msg = nlmsg_alloc();
4212 if (!msg)
4213 return -ENOMEM;
4214
4215 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4216 NL80211_CMD_SET_BSS, 0);
4217
4218 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4219 rates[rates_len++] = basic_rates[i] / 5;
4220
4221 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4222
4223 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4224
4225 return send_and_recv_msgs(drv, msg, NULL, NULL);
4226 nla_put_failure:
4227 return -ENOBUFS;
4228 }
4229
4230 #endif /* HOSTAPD */
4231
4232
4233 /* Set kernel driver on given frequency (MHz) */
4234 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4235 {
4236 struct i802_bss *bss = priv;
4237 struct wpa_driver_nl80211_data *drv = bss->drv;
4238 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4239 freq->sec_channel_offset);
4240 }
4241
4242
4243 #ifdef HOSTAPD
4244
4245 static int i802_set_rts(void *priv, int rts)
4246 {
4247 struct i802_bss *bss = priv;
4248 struct wpa_driver_nl80211_data *drv = bss->drv;
4249 struct nl_msg *msg;
4250 int ret = -ENOBUFS;
4251 u32 val;
4252
4253 msg = nlmsg_alloc();
4254 if (!msg)
4255 return -ENOMEM;
4256
4257 if (rts >= 2347)
4258 val = (u32) -1;
4259 else
4260 val = rts;
4261
4262 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4263 0, NL80211_CMD_SET_WIPHY, 0);
4264 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4265 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4266
4267 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4268 if (!ret)
4269 return 0;
4270 nla_put_failure:
4271 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4272 "%d (%s)", rts, ret, strerror(-ret));
4273 return ret;
4274 }
4275
4276
4277 static int i802_set_frag(void *priv, int frag)
4278 {
4279 struct i802_bss *bss = priv;
4280 struct wpa_driver_nl80211_data *drv = bss->drv;
4281 struct nl_msg *msg;
4282 int ret = -ENOBUFS;
4283 u32 val;
4284
4285 msg = nlmsg_alloc();
4286 if (!msg)
4287 return -ENOMEM;
4288
4289 if (frag >= 2346)
4290 val = (u32) -1;
4291 else
4292 val = frag;
4293
4294 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4295 0, NL80211_CMD_SET_WIPHY, 0);
4296 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4297 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4298
4299 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4300 if (!ret)
4301 return 0;
4302 nla_put_failure:
4303 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4304 "%d: %d (%s)", frag, ret, strerror(-ret));
4305 return ret;
4306 }
4307
4308
4309 static int i802_flush(void *priv)
4310 {
4311 struct i802_bss *bss = priv;
4312 struct wpa_driver_nl80211_data *drv = bss->drv;
4313 struct nl_msg *msg;
4314
4315 msg = nlmsg_alloc();
4316 if (!msg)
4317 return -1;
4318
4319 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4320 0, NL80211_CMD_DEL_STATION, 0);
4321
4322 /*
4323 * XXX: FIX! this needs to flush all VLANs too
4324 */
4325 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4326 if_nametoindex(bss->ifname));
4327
4328 return send_and_recv_msgs(drv, msg, NULL, NULL);
4329 nla_put_failure:
4330 return -ENOBUFS;
4331 }
4332
4333
4334 static int get_sta_handler(struct nl_msg *msg, void *arg)
4335 {
4336 struct nlattr *tb[NL80211_ATTR_MAX + 1];
4337 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4338 struct hostap_sta_driver_data *data = arg;
4339 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4340 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4341 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4342 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4343 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4344 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4345 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4346 };
4347
4348 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4349 genlmsg_attrlen(gnlh, 0), NULL);
4350
4351 /*
4352 * TODO: validate the interface and mac address!
4353 * Otherwise, there's a race condition as soon as
4354 * the kernel starts sending station notifications.
4355 */
4356
4357 if (!tb[NL80211_ATTR_STA_INFO]) {
4358 wpa_printf(MSG_DEBUG, "sta stats missing!");
4359 return NL_SKIP;
4360 }
4361 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4362 tb[NL80211_ATTR_STA_INFO],
4363 stats_policy)) {
4364 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4365 return NL_SKIP;
4366 }
4367
4368 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4369 data->inactive_msec =
4370 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4371 if (stats[NL80211_STA_INFO_RX_BYTES])
4372 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4373 if (stats[NL80211_STA_INFO_TX_BYTES])
4374 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4375 if (stats[NL80211_STA_INFO_RX_PACKETS])
4376 data->rx_packets =
4377 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4378 if (stats[NL80211_STA_INFO_TX_PACKETS])
4379 data->tx_packets =
4380 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4381
4382 return NL_SKIP;
4383 }
4384
4385 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4386 const u8 *addr)
4387 {
4388 struct i802_bss *bss = priv;
4389 struct wpa_driver_nl80211_data *drv = bss->drv;
4390 struct nl_msg *msg;
4391
4392 os_memset(data, 0, sizeof(*data));
4393 msg = nlmsg_alloc();
4394 if (!msg)
4395 return -ENOMEM;
4396
4397 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4398 0, NL80211_CMD_GET_STATION, 0);
4399
4400 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4401 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4402
4403 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4404 nla_put_failure:
4405 return -ENOBUFS;
4406 }
4407
4408
4409 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4410 int cw_min, int cw_max, int burst_time)
4411 {
4412 struct i802_bss *bss = priv;
4413 struct wpa_driver_nl80211_data *drv = bss->drv;
4414 struct nl_msg *msg;
4415 struct nlattr *txq, *params;
4416
4417 msg = nlmsg_alloc();
4418 if (!msg)
4419 return -1;
4420
4421 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4422 0, NL80211_CMD_SET_WIPHY, 0);
4423
4424 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4425
4426 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4427 if (!txq)
4428 goto nla_put_failure;
4429
4430 /* We are only sending parameters for a single TXQ at a time */
4431 params = nla_nest_start(msg, 1);
4432 if (!params)
4433 goto nla_put_failure;
4434
4435 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4436 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4437 * 32 usec, so need to convert the value here. */
4438 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4439 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4440 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4441 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4442
4443 nla_nest_end(msg, params);
4444
4445 nla_nest_end(msg, txq);
4446
4447 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4448 return 0;
4449 nla_put_failure:
4450 return -1;
4451 }
4452
4453
4454 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4455 {
4456 struct i802_bss *bss = priv;
4457 struct wpa_driver_nl80211_data *drv = bss->drv;
4458 struct nl_msg *msg;
4459
4460 msg = nlmsg_alloc();
4461 if (!msg)
4462 return -ENOMEM;
4463
4464 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4465 NL80211_CMD_SET_BSS, 0);
4466
4467 if (cts >= 0)
4468 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4469 if (preamble >= 0)
4470 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4471 if (slot >= 0)
4472 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4473
4474 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4475
4476 return send_and_recv_msgs(drv, msg, NULL, NULL);
4477 nla_put_failure:
4478 return -ENOBUFS;
4479 }
4480
4481
4482 static int i802_set_cts_protect(void *priv, int value)
4483 {
4484 return i802_set_bss(priv, value, -1, -1);
4485 }
4486
4487
4488 static int i802_set_preamble(void *priv, int value)
4489 {
4490 return i802_set_bss(priv, -1, value, -1);
4491 }
4492
4493
4494 static int i802_set_short_slot_time(void *priv, int value)
4495 {
4496 return i802_set_bss(priv, -1, -1, value);
4497 }
4498
4499
4500 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4501 const char *ifname, int vlan_id)
4502 {
4503 struct i802_bss *bss = priv;
4504 struct wpa_driver_nl80211_data *drv = bss->drv;
4505 struct nl_msg *msg;
4506
4507 msg = nlmsg_alloc();
4508 if (!msg)
4509 return -ENOMEM;
4510
4511 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4512 0, NL80211_CMD_SET_STATION, 0);
4513
4514 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4515 if_nametoindex(bss->ifname));
4516 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4517 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4518 if_nametoindex(ifname));
4519
4520 return send_and_recv_msgs(drv, msg, NULL, NULL);
4521 nla_put_failure:
4522 return -ENOBUFS;
4523 }
4524
4525
4526 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4527 {
4528 struct i802_bss *bss = priv;
4529 struct wpa_driver_nl80211_data *drv = bss->drv;
4530 char name[IFNAMSIZ + 1];
4531
4532 os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4533 wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4534 " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4535 if (val) {
4536 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4537 NULL, 1) < 0)
4538 return -1;
4539 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4540 return i802_set_sta_vlan(priv, addr, name, 0);
4541 } else {
4542 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4543 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4544 name);
4545 }
4546 }
4547
4548
4549 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4550 {
4551 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4552 struct sockaddr_ll lladdr;
4553 unsigned char buf[3000];
4554 int len;
4555 socklen_t fromlen = sizeof(lladdr);
4556
4557 len = recvfrom(sock, buf, sizeof(buf), 0,
4558 (struct sockaddr *)&lladdr, &fromlen);
4559 if (len < 0) {
4560 perror("recv");
4561 return;
4562 }
4563
4564 if (have_ifidx(drv, lladdr.sll_ifindex))
4565 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4566 }
4567
4568
4569 static int i802_get_inact_sec(void *priv, const u8 *addr)
4570 {
4571 struct hostap_sta_driver_data data;
4572 int ret;
4573
4574 data.inactive_msec = (unsigned long) -1;
4575 ret = i802_read_sta_data(priv, &data, addr);
4576 if (ret || data.inactive_msec == (unsigned long) -1)
4577 return -1;
4578 return data.inactive_msec / 1000;
4579 }
4580
4581
4582 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4583 {
4584 #if 0
4585 /* TODO */
4586 #endif
4587 return 0;
4588 }
4589
4590
4591 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4592 int reason)
4593 {
4594 struct i802_bss *bss = priv;
4595 struct ieee80211_mgmt mgmt;
4596
4597 memset(&mgmt, 0, sizeof(mgmt));
4598 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4599 WLAN_FC_STYPE_DEAUTH);
4600 memcpy(mgmt.da, addr, ETH_ALEN);
4601 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4602 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4603 mgmt.u.deauth.reason_code = host_to_le16(reason);
4604 return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4605 IEEE80211_HDRLEN +
4606 sizeof(mgmt.u.deauth));
4607 }
4608
4609
4610 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4611 int reason)
4612 {
4613 struct i802_bss *bss = priv;
4614 struct ieee80211_mgmt mgmt;
4615
4616 memset(&mgmt, 0, sizeof(mgmt));
4617 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4618 WLAN_FC_STYPE_DISASSOC);
4619 memcpy(mgmt.da, addr, ETH_ALEN);
4620 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4621 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4622 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4623 return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4624 IEEE80211_HDRLEN +
4625 sizeof(mgmt.u.disassoc));
4626 }
4627
4628
4629 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4630 const char *brname, const char *ifname)
4631 {
4632 int ifindex;
4633 char in_br[IFNAMSIZ];
4634
4635 os_strlcpy(drv->brname, brname, IFNAMSIZ);
4636 ifindex = if_nametoindex(brname);
4637 if (ifindex == 0) {
4638 /*
4639 * Bridge was configured, but the bridge device does
4640 * not exist. Try to add it now.
4641 */
4642 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4643 wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4644 "bridge interface %s: %s",
4645 brname, strerror(errno));
4646 return -1;
4647 }
4648 drv->added_bridge = 1;
4649 add_ifidx(drv, if_nametoindex(brname));
4650 }
4651
4652 if (linux_br_get(in_br, ifname) == 0) {
4653 if (os_strcmp(in_br, brname) == 0)
4654 return 0; /* already in the bridge */
4655
4656 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4657 "bridge %s", ifname, in_br);
4658 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4659 wpa_printf(MSG_ERROR, "nl80211: Failed to "
4660 "remove interface %s from bridge "
4661 "%s: %s",
4662 ifname, brname, strerror(errno));
4663 return -1;
4664 }
4665 }
4666
4667 wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4668 ifname, brname);
4669 if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4670 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4671 "into bridge %s: %s",
4672 ifname, brname, strerror(errno));
4673 return -1;
4674 }
4675 drv->added_if_into_bridge = 1;
4676
4677 return 0;
4678 }
4679
4680
4681 static void *i802_init(struct hostapd_data *hapd,
4682 struct wpa_init_params *params)
4683 {
4684 struct wpa_driver_nl80211_data *drv;
4685 struct i802_bss *bss;
4686 size_t i;
4687 char brname[IFNAMSIZ];
4688 int ifindex, br_ifindex;
4689 int br_added = 0;
4690
4691 bss = wpa_driver_nl80211_init(hapd, params->ifname);
4692 if (bss == NULL)
4693 return NULL;
4694
4695 drv = bss->drv;
4696 if (linux_br_get(brname, params->ifname) == 0) {
4697 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4698 params->ifname, brname);
4699 br_ifindex = if_nametoindex(brname);
4700 } else {
4701 brname[0] = '\0';
4702 br_ifindex = 0;
4703 }
4704
4705 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4706 drv->if_indices = drv->default_if_indices;
4707 for (i = 0; i < params->num_bridge; i++) {
4708 if (params->bridge[i]) {
4709 ifindex = if_nametoindex(params->bridge[i]);
4710 if (ifindex)
4711 add_ifidx(drv, ifindex);
4712 if (ifindex == br_ifindex)
4713 br_added = 1;
4714 }
4715 }
4716 if (!br_added && br_ifindex &&
4717 (params->num_bridge == 0 || !params->bridge[0]))
4718 add_ifidx(drv, br_ifindex);
4719
4720 /* start listening for EAPOL on the default AP interface */
4721 add_ifidx(drv, drv->ifindex);
4722
4723 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4724 goto failed;
4725
4726 if (params->bssid) {
4727 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4728 params->bssid))
4729 goto failed;
4730 }
4731
4732 if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4733 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4734 "into AP mode", bss->ifname);
4735 goto failed;
4736 }
4737
4738 if (params->num_bridge && params->bridge[0] &&
4739 i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4740 goto failed;
4741
4742 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4743 goto failed;
4744
4745 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4746 if (drv->eapol_sock < 0) {
4747 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4748 goto failed;
4749 }
4750
4751 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4752 {
4753 printf("Could not register read socket for eapol\n");
4754 goto failed;
4755 }
4756
4757 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4758 goto failed;
4759
4760 return bss;
4761
4762 failed:
4763 nl80211_remove_monitor_interface(drv);
4764 if (drv->ioctl_sock >= 0)
4765 close(drv->ioctl_sock);
4766
4767 genl_family_put(drv->nl80211);
4768 nl_cache_free(drv->nl_cache);
4769 nl_handle_destroy(drv->nl_handle);
4770 nl_cb_put(drv->nl_cb);
4771
4772 os_free(drv);
4773 return NULL;
4774 }
4775
4776
4777 static void i802_deinit(void *priv)
4778 {
4779 wpa_driver_nl80211_deinit(priv);
4780 }
4781
4782 #endif /* HOSTAPD */
4783
4784
4785 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4786 enum wpa_driver_if_type type)
4787 {
4788 switch (type) {
4789 case WPA_IF_STATION:
4790 return NL80211_IFTYPE_STATION;
4791 case WPA_IF_AP_VLAN:
4792 return NL80211_IFTYPE_AP_VLAN;
4793 case WPA_IF_AP_BSS:
4794 return NL80211_IFTYPE_AP;
4795 }
4796 return -1;
4797 }
4798
4799
4800 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
4801 const char *ifname, const u8 *addr,
4802 void *bss_ctx, void **drv_priv,
4803 char *force_ifname, u8 *if_addr)
4804 {
4805 struct i802_bss *bss = priv;
4806 struct wpa_driver_nl80211_data *drv = bss->drv;
4807 int ifidx;
4808 #ifdef HOSTAPD
4809 struct i802_bss *new_bss = NULL;
4810
4811 if (type == WPA_IF_AP_BSS) {
4812 new_bss = os_zalloc(sizeof(*new_bss));
4813 if (new_bss == NULL)
4814 return -1;
4815 }
4816 #endif /* HOSTAPD */
4817
4818 if (addr)
4819 os_memcpy(if_addr, addr, ETH_ALEN);
4820 ifidx = nl80211_create_iface(drv, ifname,
4821 wpa_driver_nl80211_if_type(type), addr,
4822 0);
4823 if (ifidx < 0) {
4824 #ifdef HOSTAPD
4825 os_free(new_bss);
4826 #endif /* HOSTAPD */
4827 return -1;
4828 }
4829
4830 if (!addr &&
4831 linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
4832 return -1;
4833
4834 #ifdef HOSTAPD
4835 if (type == WPA_IF_AP_BSS) {
4836 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4837 nl80211_remove_iface(drv, ifidx);
4838 os_free(new_bss);
4839 return -1;
4840 }
4841 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
4842 new_bss->ifindex = ifidx;
4843 new_bss->drv = drv;
4844 new_bss->next = drv->first_bss.next;
4845 drv->first_bss.next = new_bss;
4846 if (drv_priv)
4847 *drv_priv = new_bss;
4848 }
4849 #endif /* HOSTAPD */
4850
4851 return 0;
4852 }
4853
4854
4855 static int wpa_driver_nl80211_if_remove(void *priv,
4856 enum wpa_driver_if_type type,
4857 const char *ifname)
4858 {
4859 struct i802_bss *bss = priv;
4860 struct wpa_driver_nl80211_data *drv = bss->drv;
4861 int ifindex = if_nametoindex(ifname);
4862
4863 wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
4864 __func__, type, ifname, ifindex);
4865 if (ifindex <= 0)
4866 return -1;
4867 nl80211_remove_iface(drv, ifindex);
4868
4869 #ifdef HOSTAPD
4870 if (type != WPA_IF_AP_BSS)
4871 return 0;
4872
4873 if (bss != &drv->first_bss) {
4874 struct i802_bss *tbss = &drv->first_bss;
4875
4876 while (tbss) {
4877 if (tbss->next != bss)
4878 continue;
4879
4880 tbss->next = bss->next;
4881 os_free(bss);
4882 break;
4883 }
4884 }
4885 #endif /* HOSTAPD */
4886
4887 return 0;
4888 }
4889
4890
4891 static int cookie_handler(struct nl_msg *msg, void *arg)
4892 {
4893 struct nlattr *tb[NL80211_ATTR_MAX + 1];
4894 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4895 u64 *cookie = arg;
4896 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4897 genlmsg_attrlen(gnlh, 0), NULL);
4898 if (tb[NL80211_ATTR_COOKIE])
4899 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4900 return NL_SKIP;
4901 }
4902
4903
4904 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
4905 const u8 *dst, const u8 *src,
4906 const u8 *bssid,
4907 const u8 *data, size_t data_len)
4908 {
4909 struct i802_bss *bss = priv;
4910 struct wpa_driver_nl80211_data *drv = bss->drv;
4911 int ret = -1;
4912 struct nl_msg *msg;
4913 u8 *buf;
4914 struct ieee80211_hdr *hdr;
4915 u64 cookie;
4916
4917 wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
4918 drv->ifindex);
4919
4920 buf = os_zalloc(24 + data_len);
4921 if (buf == NULL)
4922 return ret;
4923 os_memcpy(buf + 24, data, data_len);
4924 hdr = (struct ieee80211_hdr *) buf;
4925 hdr->frame_control =
4926 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
4927 os_memcpy(hdr->addr1, dst, ETH_ALEN);
4928 os_memcpy(hdr->addr2, src, ETH_ALEN);
4929 os_memcpy(hdr->addr3, bssid, ETH_ALEN);
4930
4931 if (drv->nlmode == NL80211_IFTYPE_AP) {
4932 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
4933 os_free(buf);
4934 return ret;
4935 }
4936
4937 msg = nlmsg_alloc();
4938 if (!msg) {
4939 os_free(buf);
4940 return -1;
4941 }
4942
4943 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4944 NL80211_CMD_ACTION, 0);
4945
4946 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4947 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4948 NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
4949 os_free(buf);
4950 buf = NULL;
4951
4952 cookie = 0;
4953 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4954 msg = NULL;
4955 if (ret) {
4956 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
4957 "(%s)", ret, strerror(-ret));
4958 goto nla_put_failure;
4959 }
4960 wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
4961 "cookie 0x%llx", (long long unsigned int) cookie);
4962 drv->send_action_cookie = cookie;
4963 drv->pending_send_action = 1;
4964 ret = 0;
4965
4966 nla_put_failure:
4967 os_free(buf);
4968 nlmsg_free(msg);
4969 return ret;
4970 }
4971
4972
4973 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
4974 unsigned int duration)
4975 {
4976 struct i802_bss *bss = priv;
4977 struct wpa_driver_nl80211_data *drv = bss->drv;
4978 struct nl_msg *msg;
4979 int ret;
4980 u64 cookie;
4981
4982 msg = nlmsg_alloc();
4983 if (!msg)
4984 return -1;
4985
4986 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4987 NL80211_CMD_REMAIN_ON_CHANNEL, 0);
4988
4989 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4990 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4991 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
4992
4993 cookie = 0;
4994 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4995 if (ret == 0) {
4996 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
4997 "0x%llx for freq=%u MHz duration=%u",
4998 (long long unsigned int) cookie, freq, duration);
4999 drv->remain_on_chan_cookie = cookie;
5000 return 0;
5001 }
5002 wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5003 "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
5004 nla_put_failure:
5005 return -1;
5006 }
5007
5008
5009 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5010 {
5011 struct i802_bss *bss = priv;
5012 struct wpa_driver_nl80211_data *drv = bss->drv;
5013 struct nl_msg *msg;
5014 int ret;
5015
5016 if (!drv->pending_remain_on_chan) {
5017 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5018 "to cancel");
5019 return -1;
5020 }
5021
5022 wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5023 "0x%llx",
5024 (long long unsigned int) drv->remain_on_chan_cookie);
5025
5026 msg = nlmsg_alloc();
5027 if (!msg)
5028 return -1;
5029
5030 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5031 NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5032
5033 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5034 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5035
5036 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5037 if (ret == 0)
5038 return 0;
5039 wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5040 "%d (%s)", ret, strerror(-ret));
5041 nla_put_failure:
5042 return -1;
5043 }
5044
5045
5046 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5047 void *timeout_ctx)
5048 {
5049 struct wpa_driver_nl80211_data *drv = eloop_ctx;
5050 if (drv->monitor_ifidx < 0)
5051 return; /* monitor interface already removed */
5052
5053 if (drv->nlmode != NL80211_IFTYPE_STATION)
5054 return; /* not in station mode anymore */
5055
5056 if (drv->probe_req_report)
5057 return; /* reporting enabled */
5058
5059 wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5060 "Probe Request reporting needed anymore");
5061 nl80211_remove_monitor_interface(drv);
5062 }
5063
5064
5065 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5066 {
5067 struct i802_bss *bss = priv;
5068 struct wpa_driver_nl80211_data *drv = bss->drv;
5069
5070 if (drv->nlmode != NL80211_IFTYPE_STATION) {
5071 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5072 "allowed in station mode (iftype=%d)",
5073 drv->nlmode);
5074 return -1;
5075 }
5076 drv->probe_req_report = report;
5077
5078 if (report) {
5079 eloop_cancel_timeout(
5080 wpa_driver_nl80211_probe_req_report_timeout,
5081 drv, NULL);
5082 if (drv->monitor_ifidx < 0 &&
5083 nl80211_create_monitor_interface(drv))
5084 return -1;
5085 } else {
5086 /*
5087 * It takes a while to remove the monitor interface, so try to
5088 * avoid doing this if it is needed again shortly. Instead,
5089 * schedule the interface to be removed later if no need for it
5090 * is seen.
5091 */
5092 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5093 "to be removed after 10 seconds of no use");
5094 eloop_register_timeout(
5095 10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5096 drv, NULL);
5097 }
5098
5099 return 0;
5100 }
5101
5102
5103 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5104 int ifindex, int disabled)
5105 {
5106 struct nl_msg *msg;
5107 struct nlattr *bands, *band;
5108 int ret;
5109
5110 msg = nlmsg_alloc();
5111 if (!msg)
5112 return -1;
5113
5114 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5115 NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5116 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5117
5118 bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5119 if (!bands)
5120 goto nla_put_failure;
5121
5122 /*
5123 * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5124 * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5125 * rates. All 5 GHz rates are left enabled.
5126 */
5127 band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5128 if (!band)
5129 goto nla_put_failure;
5130 NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5131 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5132 nla_nest_end(msg, band);
5133
5134 nla_nest_end(msg, bands);
5135
5136 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5137 msg = NULL;
5138 if (ret) {
5139 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5140 "(%s)", ret, strerror(-ret));
5141 }
5142
5143 return ret;
5144
5145 nla_put_failure:
5146 nlmsg_free(msg);
5147 return -1;
5148 }
5149
5150
5151 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5152 {
5153 struct i802_bss *bss = priv;
5154 struct wpa_driver_nl80211_data *drv = bss->drv;
5155 drv->disable_11b_rates = disabled;
5156 return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5157 }
5158
5159
5160 static int wpa_driver_nl80211_deinit_ap(void *priv)
5161 {
5162 struct i802_bss *bss = priv;
5163 struct wpa_driver_nl80211_data *drv = bss->drv;
5164 if (drv->nlmode != NL80211_IFTYPE_AP)
5165 return -1;
5166 wpa_driver_nl80211_del_beacon(drv);
5167 return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5168 }
5169
5170
5171 static void wpa_driver_nl80211_resume(void *priv)
5172 {
5173 struct i802_bss *bss = priv;
5174 struct wpa_driver_nl80211_data *drv = bss->drv;
5175 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5176 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5177 "resume event");
5178 }
5179 }
5180
5181
5182 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5183 const u8 *ies, size_t ies_len)
5184 {
5185 struct i802_bss *bss = priv;
5186 struct wpa_driver_nl80211_data *drv = bss->drv;
5187 int ret;
5188 u8 *data, *pos;
5189 size_t data_len;
5190 u8 own_addr[ETH_ALEN];
5191
5192 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5193 return -1;
5194
5195 if (action != 1) {
5196 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5197 "action %d", action);
5198 return -1;
5199 }
5200
5201 /*
5202 * Action frame payload:
5203 * Category[1] = 6 (Fast BSS Transition)
5204 * Action[1] = 1 (Fast BSS Transition Request)
5205 * STA Address
5206 * Target AP Address
5207 * FT IEs
5208 */
5209
5210 data_len = 2 + 2 * ETH_ALEN + ies_len;
5211 data = os_malloc(data_len);
5212 if (data == NULL)
5213 return -1;
5214 pos = data;
5215 *pos++ = 0x06; /* FT Action category */
5216 *pos++ = action;
5217 os_memcpy(pos, own_addr, ETH_ALEN);
5218 pos += ETH_ALEN;
5219 os_memcpy(pos, target_ap, ETH_ALEN);
5220 pos += ETH_ALEN;
5221 os_memcpy(pos, ies, ies_len);
5222
5223 ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5224 own_addr, drv->bssid,
5225 data, data_len);
5226 os_free(data);
5227
5228 return ret;
5229 }
5230
5231
5232 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5233 {
5234 struct i802_bss *bss = priv;
5235 struct wpa_driver_nl80211_data *drv = bss->drv;
5236 struct nl_msg *msg, *cqm = NULL;
5237
5238 wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5239 "hysteresis=%d", threshold, hysteresis);
5240
5241 msg = nlmsg_alloc();
5242 if (!msg)
5243 return -1;
5244
5245 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5246 0, NL80211_CMD_SET_CQM, 0);
5247
5248 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5249
5250 cqm = nlmsg_alloc();
5251 if (cqm == NULL)
5252 return -1;
5253
5254 NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5255 NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5256 nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5257
5258 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5259 return 0;
5260 msg = NULL;
5261
5262 nla_put_failure:
5263 if (cqm)
5264 nlmsg_free(cqm);
5265 nlmsg_free(msg);
5266 return -1;
5267 }
5268
5269
5270 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5271 int encrypt)
5272 {
5273 struct i802_bss *bss = priv;
5274 struct wpa_driver_nl80211_data *drv = bss->drv;
5275 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5276 }
5277
5278
5279 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5280 .name = "nl80211",
5281 .desc = "Linux nl80211/cfg80211",
5282 .get_bssid = wpa_driver_nl80211_get_bssid,
5283 .get_ssid = wpa_driver_nl80211_get_ssid,
5284 .set_key = wpa_driver_nl80211_set_key,
5285 .scan2 = wpa_driver_nl80211_scan,
5286 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5287 .deauthenticate = wpa_driver_nl80211_deauthenticate,
5288 .disassociate = wpa_driver_nl80211_disassociate,
5289 .authenticate = wpa_driver_nl80211_authenticate,
5290 .associate = wpa_driver_nl80211_associate,
5291 .init = wpa_driver_nl80211_init,
5292 .deinit = wpa_driver_nl80211_deinit,
5293 .get_capa = wpa_driver_nl80211_get_capa,
5294 .set_operstate = wpa_driver_nl80211_set_operstate,
5295 .set_supp_port = wpa_driver_nl80211_set_supp_port,
5296 .set_country = wpa_driver_nl80211_set_country,
5297 .set_beacon = wpa_driver_nl80211_set_beacon,
5298 .if_add = wpa_driver_nl80211_if_add,
5299 .if_remove = wpa_driver_nl80211_if_remove,
5300 .send_mlme = wpa_driver_nl80211_send_mlme,
5301 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5302 .sta_add = wpa_driver_nl80211_sta_add,
5303 .sta_remove = wpa_driver_nl80211_sta_remove,
5304 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5305 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5306 #ifdef HOSTAPD
5307 .hapd_init = i802_init,
5308 .hapd_deinit = i802_deinit,
5309 .get_seqnum = i802_get_seqnum,
5310 .flush = i802_flush,
5311 .read_sta_data = i802_read_sta_data,
5312 .sta_deauth = i802_sta_deauth,
5313 .sta_disassoc = i802_sta_disassoc,
5314 .get_inact_sec = i802_get_inact_sec,
5315 .sta_clear_stats = i802_sta_clear_stats,
5316 .set_rts = i802_set_rts,
5317 .set_frag = i802_set_frag,
5318 .set_rate_sets = i802_set_rate_sets,
5319 .set_cts_protect = i802_set_cts_protect,
5320 .set_preamble = i802_set_preamble,
5321 .set_short_slot_time = i802_set_short_slot_time,
5322 .set_tx_queue_params = i802_set_tx_queue_params,
5323 .set_sta_vlan = i802_set_sta_vlan,
5324 .set_wds_sta = i802_set_wds_sta,
5325 #endif /* HOSTAPD */
5326 .set_freq = i802_set_freq,
5327 .send_action = wpa_driver_nl80211_send_action,
5328 .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5329 .cancel_remain_on_channel =
5330 wpa_driver_nl80211_cancel_remain_on_channel,
5331 .probe_req_report = wpa_driver_nl80211_probe_req_report,
5332 .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5333 .deinit_ap = wpa_driver_nl80211_deinit_ap,
5334 .resume = wpa_driver_nl80211_resume,
5335 .send_ft_action = nl80211_send_ft_action,
5336 .signal_monitor = nl80211_signal_monitor,
5337 .send_frame = nl80211_send_frame,
5338 };
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