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WNM: Add BSS Transition Management Request for ESS Disassoc Imminent
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009-2010, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <fcntl.h>
24 #include <net/if.h>
25 #include <netlink/genl/genl.h>
26 #include <netlink/genl/family.h>
27 #include <netlink/genl/ctrl.h>
28 #include <linux/rtnetlink.h>
29 #include <netpacket/packet.h>
30 #include <linux/filter.h>
31 #include "nl80211_copy.h"
32
33 #include "common.h"
34 #include "eloop.h"
35 #include "utils/list.h"
36 #include "common/ieee802_11_defs.h"
37 #include "l2_packet/l2_packet.h"
38 #include "netlink.h"
39 #include "linux_ioctl.h"
40 #include "radiotap.h"
41 #include "radiotap_iter.h"
42 #include "rfkill.h"
43 #include "driver.h"
44
45 #ifdef CONFIG_LIBNL20
46 /* libnl 2.0 compatibility code */
47 #define nl_handle nl_sock
48 #define nl80211_handle_alloc nl_socket_alloc_cb
49 #define nl80211_handle_destroy nl_socket_free
50 #else
51 /*
52 * libnl 1.1 has a bug, it tries to allocate socket numbers densely
53 * but when you free a socket again it will mess up its bitmap and
54 * and use the wrong number the next time it needs a socket ID.
55 * Therefore, we wrap the handle alloc/destroy and add our own pid
56 * accounting.
57 */
58 static uint32_t port_bitmap[32] = { 0 };
59
60 static struct nl_handle *nl80211_handle_alloc(void *cb)
61 {
62 struct nl_handle *handle;
63 uint32_t pid = getpid() & 0x3FFFFF;
64 int i;
65
66 handle = nl_handle_alloc_cb(cb);
67
68 for (i = 0; i < 1024; i++) {
69 if (port_bitmap[i / 32] & (1 << (i % 32)))
70 continue;
71 port_bitmap[i / 32] |= 1 << (i % 32);
72 pid += i << 22;
73 break;
74 }
75
76 nl_socket_set_local_port(handle, pid);
77
78 return handle;
79 }
80
81 static void nl80211_handle_destroy(struct nl_handle *handle)
82 {
83 uint32_t port = nl_socket_get_local_port(handle);
84
85 port >>= 22;
86 port_bitmap[port / 32] &= ~(1 << (port % 32));
87
88 nl_handle_destroy(handle);
89 }
90 #endif /* CONFIG_LIBNL20 */
91
92
93 #ifndef IFF_LOWER_UP
94 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
95 #endif
96 #ifndef IFF_DORMANT
97 #define IFF_DORMANT 0x20000 /* driver signals dormant */
98 #endif
99
100 #ifndef IF_OPER_DORMANT
101 #define IF_OPER_DORMANT 5
102 #endif
103 #ifndef IF_OPER_UP
104 #define IF_OPER_UP 6
105 #endif
106
107 struct nl80211_global {
108 struct dl_list interfaces;
109 int if_add_ifindex;
110 };
111
112 struct i802_bss {
113 struct wpa_driver_nl80211_data *drv;
114 struct i802_bss *next;
115 int ifindex;
116 char ifname[IFNAMSIZ + 1];
117 char brname[IFNAMSIZ];
118 unsigned int beacon_set:1;
119 unsigned int added_if_into_bridge:1;
120 unsigned int added_bridge:1;
121 };
122
123 struct wpa_driver_nl80211_data {
124 struct nl80211_global *global;
125 struct dl_list list;
126 u8 addr[ETH_ALEN];
127 char phyname[32];
128 void *ctx;
129 struct netlink_data *netlink;
130 int ioctl_sock; /* socket for ioctl() use */
131 int ifindex;
132 int if_removed;
133 int if_disabled;
134 int ignore_if_down_event;
135 struct rfkill_data *rfkill;
136 struct wpa_driver_capa capa;
137 int has_capability;
138
139 int operstate;
140
141 int scan_complete_events;
142
143 struct nl_handle *nl_handle;
144 struct nl_handle *nl_handle_event;
145 struct nl_handle *nl_handle_preq;
146 struct nl_cache *nl_cache;
147 struct nl_cache *nl_cache_event;
148 struct nl_cache *nl_cache_preq;
149 struct nl_cb *nl_cb;
150 struct genl_family *nl80211;
151
152 u8 auth_bssid[ETH_ALEN];
153 u8 bssid[ETH_ALEN];
154 int associated;
155 u8 ssid[32];
156 size_t ssid_len;
157 enum nl80211_iftype nlmode;
158 enum nl80211_iftype ap_scan_as_station;
159 unsigned int assoc_freq;
160
161 int monitor_sock;
162 int monitor_ifidx;
163 int no_monitor_iface_capab;
164 int disable_11b_rates;
165
166 unsigned int pending_remain_on_chan:1;
167
168 u64 remain_on_chan_cookie;
169 u64 send_action_cookie;
170
171 unsigned int last_mgmt_freq;
172 unsigned int ap_oper_freq;
173
174 struct wpa_driver_scan_filter *filter_ssids;
175 size_t num_filter_ssids;
176
177 struct i802_bss first_bss;
178
179 #ifdef CONFIG_AP
180 struct l2_packet_data *l2;
181 #endif /* CONFIG_AP */
182
183 #ifdef HOSTAPD
184 int eapol_sock; /* socket for EAPOL frames */
185
186 int default_if_indices[16];
187 int *if_indices;
188 int num_if_indices;
189
190 int last_freq;
191 int last_freq_ht;
192 #endif /* HOSTAPD */
193 };
194
195
196 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
197 void *timeout_ctx);
198 static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
199 enum nl80211_iftype nlmode);
200 static int
201 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
202 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
203 const u8 *addr, int cmd, u16 reason_code,
204 int local_state_change);
205 static void nl80211_remove_monitor_interface(
206 struct wpa_driver_nl80211_data *drv);
207 static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
208 unsigned int freq, unsigned int wait,
209 const u8 *buf, size_t buf_len, u64 *cookie);
210 static int wpa_driver_nl80211_probe_req_report(void *priv, int report);
211
212 #ifdef HOSTAPD
213 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
214 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
215 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
216 static int wpa_driver_nl80211_if_remove(void *priv,
217 enum wpa_driver_if_type type,
218 const char *ifname);
219 #else /* HOSTAPD */
220 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
221 {
222 return 0;
223 }
224 #endif /* HOSTAPD */
225
226 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
227 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
228 int ifindex, int disabled);
229
230 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv);
231
232
233 static int is_ap_interface(enum nl80211_iftype nlmode)
234 {
235 return (nlmode == NL80211_IFTYPE_AP ||
236 nlmode == NL80211_IFTYPE_P2P_GO);
237 }
238
239
240 static int is_sta_interface(enum nl80211_iftype nlmode)
241 {
242 return (nlmode == NL80211_IFTYPE_STATION ||
243 nlmode == NL80211_IFTYPE_P2P_CLIENT);
244 }
245
246
247 struct nl80211_bss_info_arg {
248 struct wpa_driver_nl80211_data *drv;
249 struct wpa_scan_results *res;
250 unsigned int assoc_freq;
251 u8 assoc_bssid[ETH_ALEN];
252 };
253
254 static int bss_info_handler(struct nl_msg *msg, void *arg);
255
256
257 /* nl80211 code */
258 static int ack_handler(struct nl_msg *msg, void *arg)
259 {
260 int *err = arg;
261 *err = 0;
262 return NL_STOP;
263 }
264
265 static int finish_handler(struct nl_msg *msg, void *arg)
266 {
267 int *ret = arg;
268 *ret = 0;
269 return NL_SKIP;
270 }
271
272 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
273 void *arg)
274 {
275 int *ret = arg;
276 *ret = err->error;
277 return NL_SKIP;
278 }
279
280
281 static int no_seq_check(struct nl_msg *msg, void *arg)
282 {
283 return NL_OK;
284 }
285
286
287 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
288 struct nl_handle *nl_handle, struct nl_msg *msg,
289 int (*valid_handler)(struct nl_msg *, void *),
290 void *valid_data)
291 {
292 struct nl_cb *cb;
293 int err = -ENOMEM;
294
295 cb = nl_cb_clone(drv->nl_cb);
296 if (!cb)
297 goto out;
298
299 err = nl_send_auto_complete(nl_handle, msg);
300 if (err < 0)
301 goto out;
302
303 err = 1;
304
305 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
306 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
307 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
308
309 if (valid_handler)
310 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
311 valid_handler, valid_data);
312
313 while (err > 0)
314 nl_recvmsgs(nl_handle, cb);
315 out:
316 nl_cb_put(cb);
317 nlmsg_free(msg);
318 return err;
319 }
320
321
322 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
323 struct nl_msg *msg,
324 int (*valid_handler)(struct nl_msg *, void *),
325 void *valid_data)
326 {
327 return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
328 valid_data);
329 }
330
331
332 struct family_data {
333 const char *group;
334 int id;
335 };
336
337
338 static int family_handler(struct nl_msg *msg, void *arg)
339 {
340 struct family_data *res = arg;
341 struct nlattr *tb[CTRL_ATTR_MAX + 1];
342 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
343 struct nlattr *mcgrp;
344 int i;
345
346 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
347 genlmsg_attrlen(gnlh, 0), NULL);
348 if (!tb[CTRL_ATTR_MCAST_GROUPS])
349 return NL_SKIP;
350
351 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
352 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
353 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
354 nla_len(mcgrp), NULL);
355 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
356 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
357 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
358 res->group,
359 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
360 continue;
361 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
362 break;
363 };
364
365 return NL_SKIP;
366 }
367
368
369 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
370 const char *family, const char *group)
371 {
372 struct nl_msg *msg;
373 int ret = -1;
374 struct family_data res = { group, -ENOENT };
375
376 msg = nlmsg_alloc();
377 if (!msg)
378 return -ENOMEM;
379 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
380 0, 0, CTRL_CMD_GETFAMILY, 0);
381 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
382
383 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
384 msg = NULL;
385 if (ret == 0)
386 ret = res.id;
387
388 nla_put_failure:
389 nlmsg_free(msg);
390 return ret;
391 }
392
393
394 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
395 {
396 struct i802_bss *bss = priv;
397 struct wpa_driver_nl80211_data *drv = bss->drv;
398 if (!drv->associated)
399 return -1;
400 os_memcpy(bssid, drv->bssid, ETH_ALEN);
401 return 0;
402 }
403
404
405 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
406 {
407 struct i802_bss *bss = priv;
408 struct wpa_driver_nl80211_data *drv = bss->drv;
409 if (!drv->associated)
410 return -1;
411 os_memcpy(ssid, drv->ssid, drv->ssid_len);
412 return drv->ssid_len;
413 }
414
415
416 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
417 char *buf, size_t len, int del)
418 {
419 union wpa_event_data event;
420
421 os_memset(&event, 0, sizeof(event));
422 if (len > sizeof(event.interface_status.ifname))
423 len = sizeof(event.interface_status.ifname) - 1;
424 os_memcpy(event.interface_status.ifname, buf, len);
425 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
426 EVENT_INTERFACE_ADDED;
427
428 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
429 del ? "DEL" : "NEW",
430 event.interface_status.ifname,
431 del ? "removed" : "added");
432
433 if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
434 if (del)
435 drv->if_removed = 1;
436 else
437 drv->if_removed = 0;
438 }
439
440 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
441 }
442
443
444 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
445 u8 *buf, size_t len)
446 {
447 int attrlen, rta_len;
448 struct rtattr *attr;
449
450 attrlen = len;
451 attr = (struct rtattr *) buf;
452
453 rta_len = RTA_ALIGN(sizeof(struct rtattr));
454 while (RTA_OK(attr, attrlen)) {
455 if (attr->rta_type == IFLA_IFNAME) {
456 if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
457 == 0)
458 return 1;
459 else
460 break;
461 }
462 attr = RTA_NEXT(attr, attrlen);
463 }
464
465 return 0;
466 }
467
468
469 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
470 int ifindex, u8 *buf, size_t len)
471 {
472 if (drv->ifindex == ifindex)
473 return 1;
474
475 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
476 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
477 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
478 "interface");
479 wpa_driver_nl80211_finish_drv_init(drv);
480 return 1;
481 }
482
483 return 0;
484 }
485
486
487 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
488 struct ifinfomsg *ifi,
489 u8 *buf, size_t len)
490 {
491 struct wpa_driver_nl80211_data *drv = ctx;
492 int attrlen, rta_len;
493 struct rtattr *attr;
494 u32 brid = 0;
495
496 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
497 !have_ifidx(drv, ifi->ifi_index)) {
498 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
499 "ifindex %d", ifi->ifi_index);
500 return;
501 }
502
503 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
504 "(%s%s%s%s)",
505 drv->operstate, ifi->ifi_flags,
506 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
507 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
508 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
509 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
510
511 if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
512 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
513 if (drv->ignore_if_down_event) {
514 wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down "
515 "event generated by mode change");
516 drv->ignore_if_down_event = 0;
517 } else {
518 drv->if_disabled = 1;
519 wpa_supplicant_event(drv->ctx,
520 EVENT_INTERFACE_DISABLED, NULL);
521 }
522 }
523
524 if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
525 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
526 drv->if_disabled = 0;
527 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
528 }
529
530 /*
531 * Some drivers send the association event before the operup event--in
532 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
533 * fails. This will hit us when wpa_supplicant does not need to do
534 * IEEE 802.1X authentication
535 */
536 if (drv->operstate == 1 &&
537 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
538 !(ifi->ifi_flags & IFF_RUNNING))
539 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
540 -1, IF_OPER_UP);
541
542 attrlen = len;
543 attr = (struct rtattr *) buf;
544 rta_len = RTA_ALIGN(sizeof(struct rtattr));
545 while (RTA_OK(attr, attrlen)) {
546 if (attr->rta_type == IFLA_IFNAME) {
547 wpa_driver_nl80211_event_link(
548 drv,
549 ((char *) attr) + rta_len,
550 attr->rta_len - rta_len, 0);
551 } else if (attr->rta_type == IFLA_MASTER)
552 brid = nla_get_u32((struct nlattr *) attr);
553 attr = RTA_NEXT(attr, attrlen);
554 }
555
556 #ifdef HOSTAPD
557 if (ifi->ifi_family == AF_BRIDGE && brid) {
558 /* device has been added to bridge */
559 char namebuf[IFNAMSIZ];
560 if_indextoname(brid, namebuf);
561 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
562 brid, namebuf);
563 add_ifidx(drv, brid);
564 }
565 #endif /* HOSTAPD */
566 }
567
568
569 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
570 struct ifinfomsg *ifi,
571 u8 *buf, size_t len)
572 {
573 struct wpa_driver_nl80211_data *drv = ctx;
574 int attrlen, rta_len;
575 struct rtattr *attr;
576 u32 brid = 0;
577
578 attrlen = len;
579 attr = (struct rtattr *) buf;
580
581 rta_len = RTA_ALIGN(sizeof(struct rtattr));
582 while (RTA_OK(attr, attrlen)) {
583 if (attr->rta_type == IFLA_IFNAME) {
584 wpa_driver_nl80211_event_link(
585 drv,
586 ((char *) attr) + rta_len,
587 attr->rta_len - rta_len, 1);
588 } else if (attr->rta_type == IFLA_MASTER)
589 brid = nla_get_u32((struct nlattr *) attr);
590 attr = RTA_NEXT(attr, attrlen);
591 }
592
593 #ifdef HOSTAPD
594 if (ifi->ifi_family == AF_BRIDGE && brid) {
595 /* device has been removed from bridge */
596 char namebuf[IFNAMSIZ];
597 if_indextoname(brid, namebuf);
598 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
599 "%s", brid, namebuf);
600 del_ifidx(drv, brid);
601 }
602 #endif /* HOSTAPD */
603 }
604
605
606 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
607 const u8 *frame, size_t len)
608 {
609 const struct ieee80211_mgmt *mgmt;
610 union wpa_event_data event;
611
612 mgmt = (const struct ieee80211_mgmt *) frame;
613 if (len < 24 + sizeof(mgmt->u.auth)) {
614 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
615 "frame");
616 return;
617 }
618
619 os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
620 os_memset(&event, 0, sizeof(event));
621 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
622 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
623 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
624 if (len > 24 + sizeof(mgmt->u.auth)) {
625 event.auth.ies = mgmt->u.auth.variable;
626 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
627 }
628
629 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
630 }
631
632
633 static unsigned int nl80211_get_assoc_freq(struct wpa_driver_nl80211_data *drv)
634 {
635 struct nl_msg *msg;
636 int ret;
637 struct nl80211_bss_info_arg arg;
638
639 os_memset(&arg, 0, sizeof(arg));
640 msg = nlmsg_alloc();
641 if (!msg)
642 goto nla_put_failure;
643
644 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
645 NL80211_CMD_GET_SCAN, 0);
646 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
647
648 arg.drv = drv;
649 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
650 msg = NULL;
651 if (ret == 0) {
652 wpa_printf(MSG_DEBUG, "nl80211: Operating frequency for the "
653 "associated BSS from scan results: %u MHz",
654 arg.assoc_freq);
655 return arg.assoc_freq ? arg.assoc_freq : drv->assoc_freq;
656 }
657 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
658 "(%s)", ret, strerror(-ret));
659 nla_put_failure:
660 nlmsg_free(msg);
661 return drv->assoc_freq;
662 }
663
664
665 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
666 const u8 *frame, size_t len)
667 {
668 const struct ieee80211_mgmt *mgmt;
669 union wpa_event_data event;
670 u16 status;
671
672 mgmt = (const struct ieee80211_mgmt *) frame;
673 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
674 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
675 "frame");
676 return;
677 }
678
679 status = le_to_host16(mgmt->u.assoc_resp.status_code);
680 if (status != WLAN_STATUS_SUCCESS) {
681 os_memset(&event, 0, sizeof(event));
682 event.assoc_reject.bssid = mgmt->bssid;
683 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
684 event.assoc_reject.resp_ies =
685 (u8 *) mgmt->u.assoc_resp.variable;
686 event.assoc_reject.resp_ies_len =
687 len - 24 - sizeof(mgmt->u.assoc_resp);
688 }
689 event.assoc_reject.status_code = status;
690
691 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
692 return;
693 }
694
695 drv->associated = 1;
696 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
697
698 os_memset(&event, 0, sizeof(event));
699 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
700 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
701 event.assoc_info.resp_ies_len =
702 len - 24 - sizeof(mgmt->u.assoc_resp);
703 }
704
705 event.assoc_info.freq = drv->assoc_freq;
706
707 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
708 }
709
710
711 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
712 enum nl80211_commands cmd, struct nlattr *status,
713 struct nlattr *addr, struct nlattr *req_ie,
714 struct nlattr *resp_ie)
715 {
716 union wpa_event_data event;
717
718 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
719 /*
720 * Avoid reporting two association events that would confuse
721 * the core code.
722 */
723 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
724 "when using userspace SME", cmd);
725 return;
726 }
727
728 os_memset(&event, 0, sizeof(event));
729 if (cmd == NL80211_CMD_CONNECT &&
730 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
731 if (addr)
732 event.assoc_reject.bssid = nla_data(addr);
733 if (resp_ie) {
734 event.assoc_reject.resp_ies = nla_data(resp_ie);
735 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
736 }
737 event.assoc_reject.status_code = nla_get_u16(status);
738 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
739 return;
740 }
741
742 drv->associated = 1;
743 if (addr)
744 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
745
746 if (req_ie) {
747 event.assoc_info.req_ies = nla_data(req_ie);
748 event.assoc_info.req_ies_len = nla_len(req_ie);
749 }
750 if (resp_ie) {
751 event.assoc_info.resp_ies = nla_data(resp_ie);
752 event.assoc_info.resp_ies_len = nla_len(resp_ie);
753 }
754
755 event.assoc_info.freq = nl80211_get_assoc_freq(drv);
756
757 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
758 }
759
760
761 static void mlme_event_disconnect(struct wpa_driver_nl80211_data *drv,
762 struct nlattr *reason, struct nlattr *addr)
763 {
764 union wpa_event_data data;
765
766 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
767 /*
768 * Avoid reporting two disassociation events that could
769 * confuse the core code.
770 */
771 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
772 "event when using userspace SME");
773 return;
774 }
775
776 drv->associated = 0;
777 os_memset(&data, 0, sizeof(data));
778 if (reason)
779 data.disassoc_info.reason_code = nla_get_u16(reason);
780 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
781 }
782
783
784 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
785 enum nl80211_commands cmd, struct nlattr *addr)
786 {
787 union wpa_event_data event;
788 enum wpa_event_type ev;
789
790 if (nla_len(addr) != ETH_ALEN)
791 return;
792
793 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
794 cmd, MAC2STR((u8 *) nla_data(addr)));
795
796 if (cmd == NL80211_CMD_AUTHENTICATE)
797 ev = EVENT_AUTH_TIMED_OUT;
798 else if (cmd == NL80211_CMD_ASSOCIATE)
799 ev = EVENT_ASSOC_TIMED_OUT;
800 else
801 return;
802
803 os_memset(&event, 0, sizeof(event));
804 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
805 wpa_supplicant_event(drv->ctx, ev, &event);
806 }
807
808
809 static void mlme_event_mgmt(struct wpa_driver_nl80211_data *drv,
810 struct nlattr *freq, const u8 *frame, size_t len)
811 {
812 const struct ieee80211_mgmt *mgmt;
813 union wpa_event_data event;
814 u16 fc, stype;
815
816 mgmt = (const struct ieee80211_mgmt *) frame;
817 if (len < 24) {
818 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
819 return;
820 }
821
822 fc = le_to_host16(mgmt->frame_control);
823 stype = WLAN_FC_GET_STYPE(fc);
824
825 os_memset(&event, 0, sizeof(event));
826 if (freq) {
827 event.rx_action.freq = nla_get_u32(freq);
828 drv->last_mgmt_freq = event.rx_action.freq;
829 }
830 if (stype == WLAN_FC_STYPE_ACTION) {
831 event.rx_action.da = mgmt->da;
832 event.rx_action.sa = mgmt->sa;
833 event.rx_action.bssid = mgmt->bssid;
834 event.rx_action.category = mgmt->u.action.category;
835 event.rx_action.data = &mgmt->u.action.category + 1;
836 event.rx_action.len = frame + len - event.rx_action.data;
837 wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
838 } else {
839 event.rx_mgmt.frame = frame;
840 event.rx_mgmt.frame_len = len;
841 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
842 }
843 }
844
845
846 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
847 struct nlattr *cookie, const u8 *frame,
848 size_t len, struct nlattr *ack)
849 {
850 union wpa_event_data event;
851 const struct ieee80211_hdr *hdr;
852 u16 fc;
853 u64 cookie_val;
854
855 if (!cookie)
856 return;
857
858 cookie_val = nla_get_u64(cookie);
859 wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
860 "(ack=%d)",
861 (long long unsigned int) cookie_val,
862 cookie_val == drv->send_action_cookie ?
863 " (match)" : " (unknown)", ack != NULL);
864 if (cookie_val != drv->send_action_cookie)
865 return;
866
867 hdr = (const struct ieee80211_hdr *) frame;
868 fc = le_to_host16(hdr->frame_control);
869
870 os_memset(&event, 0, sizeof(event));
871 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
872 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
873 event.tx_status.dst = hdr->addr1;
874 event.tx_status.data = frame;
875 event.tx_status.data_len = len;
876 event.tx_status.ack = ack != NULL;
877 wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
878 }
879
880
881 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
882 enum wpa_event_type type,
883 const u8 *frame, size_t len)
884 {
885 const struct ieee80211_mgmt *mgmt;
886 union wpa_event_data event;
887 const u8 *bssid = NULL;
888 u16 reason_code = 0;
889
890 mgmt = (const struct ieee80211_mgmt *) frame;
891 if (len >= 24) {
892 bssid = mgmt->bssid;
893
894 if (drv->associated != 0 &&
895 os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
896 os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
897 /*
898 * We have presumably received this deauth as a
899 * response to a clear_state_mismatch() outgoing
900 * deauth. Don't let it take us offline!
901 */
902 wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
903 "from Unknown BSSID " MACSTR " -- ignoring",
904 MAC2STR(bssid));
905 return;
906 }
907 }
908
909 drv->associated = 0;
910 os_memset(&event, 0, sizeof(event));
911
912 /* Note: Same offset for Reason Code in both frame subtypes */
913 if (len >= 24 + sizeof(mgmt->u.deauth))
914 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
915
916 if (type == EVENT_DISASSOC) {
917 event.disassoc_info.addr = bssid;
918 event.disassoc_info.reason_code = reason_code;
919 if (frame + len > mgmt->u.disassoc.variable) {
920 event.disassoc_info.ie = mgmt->u.disassoc.variable;
921 event.disassoc_info.ie_len = frame + len -
922 mgmt->u.disassoc.variable;
923 }
924 } else {
925 event.deauth_info.addr = bssid;
926 event.deauth_info.reason_code = reason_code;
927 if (frame + len > mgmt->u.deauth.variable) {
928 event.deauth_info.ie = mgmt->u.deauth.variable;
929 event.deauth_info.ie_len = frame + len -
930 mgmt->u.deauth.variable;
931 }
932 }
933
934 wpa_supplicant_event(drv->ctx, type, &event);
935 }
936
937
938 static void mlme_event_unprot_disconnect(struct wpa_driver_nl80211_data *drv,
939 enum wpa_event_type type,
940 const u8 *frame, size_t len)
941 {
942 const struct ieee80211_mgmt *mgmt;
943 union wpa_event_data event;
944 u16 reason_code = 0;
945
946 if (len < 24)
947 return;
948
949 mgmt = (const struct ieee80211_mgmt *) frame;
950
951 os_memset(&event, 0, sizeof(event));
952 /* Note: Same offset for Reason Code in both frame subtypes */
953 if (len >= 24 + sizeof(mgmt->u.deauth))
954 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
955
956 if (type == EVENT_UNPROT_DISASSOC) {
957 event.unprot_disassoc.sa = mgmt->sa;
958 event.unprot_disassoc.da = mgmt->da;
959 event.unprot_disassoc.reason_code = reason_code;
960 } else {
961 event.unprot_deauth.sa = mgmt->sa;
962 event.unprot_deauth.da = mgmt->da;
963 event.unprot_deauth.reason_code = reason_code;
964 }
965
966 wpa_supplicant_event(drv->ctx, type, &event);
967 }
968
969
970 static void mlme_event(struct wpa_driver_nl80211_data *drv,
971 enum nl80211_commands cmd, struct nlattr *frame,
972 struct nlattr *addr, struct nlattr *timed_out,
973 struct nlattr *freq, struct nlattr *ack,
974 struct nlattr *cookie)
975 {
976 if (timed_out && addr) {
977 mlme_timeout_event(drv, cmd, addr);
978 return;
979 }
980
981 if (frame == NULL) {
982 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
983 "data", cmd);
984 return;
985 }
986
987 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
988 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
989 nla_data(frame), nla_len(frame));
990
991 switch (cmd) {
992 case NL80211_CMD_AUTHENTICATE:
993 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
994 break;
995 case NL80211_CMD_ASSOCIATE:
996 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
997 break;
998 case NL80211_CMD_DEAUTHENTICATE:
999 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
1000 nla_data(frame), nla_len(frame));
1001 break;
1002 case NL80211_CMD_DISASSOCIATE:
1003 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
1004 nla_data(frame), nla_len(frame));
1005 break;
1006 case NL80211_CMD_FRAME:
1007 mlme_event_mgmt(drv, freq, nla_data(frame), nla_len(frame));
1008 break;
1009 case NL80211_CMD_FRAME_TX_STATUS:
1010 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
1011 nla_len(frame), ack);
1012 break;
1013 case NL80211_CMD_UNPROT_DEAUTHENTICATE:
1014 mlme_event_unprot_disconnect(drv, EVENT_UNPROT_DEAUTH,
1015 nla_data(frame), nla_len(frame));
1016 break;
1017 case NL80211_CMD_UNPROT_DISASSOCIATE:
1018 mlme_event_unprot_disconnect(drv, EVENT_UNPROT_DISASSOC,
1019 nla_data(frame), nla_len(frame));
1020 break;
1021 default:
1022 break;
1023 }
1024 }
1025
1026
1027 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
1028 struct nlattr *tb[])
1029 {
1030 union wpa_event_data data;
1031
1032 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
1033 os_memset(&data, 0, sizeof(data));
1034 if (tb[NL80211_ATTR_MAC]) {
1035 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
1036 nla_data(tb[NL80211_ATTR_MAC]),
1037 nla_len(tb[NL80211_ATTR_MAC]));
1038 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
1039 }
1040 if (tb[NL80211_ATTR_KEY_SEQ]) {
1041 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
1042 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
1043 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
1044 }
1045 if (tb[NL80211_ATTR_KEY_TYPE]) {
1046 enum nl80211_key_type key_type =
1047 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
1048 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
1049 if (key_type == NL80211_KEYTYPE_PAIRWISE)
1050 data.michael_mic_failure.unicast = 1;
1051 } else
1052 data.michael_mic_failure.unicast = 1;
1053
1054 if (tb[NL80211_ATTR_KEY_IDX]) {
1055 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
1056 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
1057 }
1058
1059 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
1060 }
1061
1062
1063 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
1064 struct nlattr *tb[])
1065 {
1066 if (tb[NL80211_ATTR_MAC] == NULL) {
1067 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
1068 "event");
1069 return;
1070 }
1071 os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
1072 drv->associated = 1;
1073 wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
1074 MAC2STR(drv->bssid));
1075
1076 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
1077 }
1078
1079
1080 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
1081 int cancel_event, struct nlattr *tb[])
1082 {
1083 unsigned int freq, chan_type, duration;
1084 union wpa_event_data data;
1085 u64 cookie;
1086
1087 if (tb[NL80211_ATTR_WIPHY_FREQ])
1088 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1089 else
1090 freq = 0;
1091
1092 if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1093 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1094 else
1095 chan_type = 0;
1096
1097 if (tb[NL80211_ATTR_DURATION])
1098 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
1099 else
1100 duration = 0;
1101
1102 if (tb[NL80211_ATTR_COOKIE])
1103 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
1104 else
1105 cookie = 0;
1106
1107 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
1108 "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
1109 cancel_event, freq, chan_type, duration,
1110 (long long unsigned int) cookie,
1111 cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
1112
1113 if (cookie != drv->remain_on_chan_cookie)
1114 return; /* not for us */
1115
1116 if (cancel_event)
1117 drv->pending_remain_on_chan = 0;
1118
1119 os_memset(&data, 0, sizeof(data));
1120 data.remain_on_channel.freq = freq;
1121 data.remain_on_channel.duration = duration;
1122 wpa_supplicant_event(drv->ctx, cancel_event ?
1123 EVENT_CANCEL_REMAIN_ON_CHANNEL :
1124 EVENT_REMAIN_ON_CHANNEL, &data);
1125 }
1126
1127
1128 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
1129 struct nlattr *tb[])
1130 {
1131 union wpa_event_data event;
1132 struct nlattr *nl;
1133 int rem;
1134 struct scan_info *info;
1135 #define MAX_REPORT_FREQS 50
1136 int freqs[MAX_REPORT_FREQS];
1137 int num_freqs = 0;
1138
1139 os_memset(&event, 0, sizeof(event));
1140 info = &event.scan_info;
1141 info->aborted = aborted;
1142
1143 if (tb[NL80211_ATTR_SCAN_SSIDS]) {
1144 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
1145 struct wpa_driver_scan_ssid *s =
1146 &info->ssids[info->num_ssids];
1147 s->ssid = nla_data(nl);
1148 s->ssid_len = nla_len(nl);
1149 info->num_ssids++;
1150 if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
1151 break;
1152 }
1153 }
1154 if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
1155 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
1156 {
1157 freqs[num_freqs] = nla_get_u32(nl);
1158 num_freqs++;
1159 if (num_freqs == MAX_REPORT_FREQS - 1)
1160 break;
1161 }
1162 info->freqs = freqs;
1163 info->num_freqs = num_freqs;
1164 }
1165 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
1166 }
1167
1168
1169 static int get_link_signal(struct nl_msg *msg, void *arg)
1170 {
1171 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1172 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1173 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1174 static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
1175 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1176 };
1177 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1178 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1179 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1180 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1181 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1182 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1183 };
1184 struct wpa_signal_info *sig_change = arg;
1185
1186 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1187 genlmsg_attrlen(gnlh, 0), NULL);
1188 if (!tb[NL80211_ATTR_STA_INFO] ||
1189 nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1190 tb[NL80211_ATTR_STA_INFO], policy))
1191 return NL_SKIP;
1192 if (!sinfo[NL80211_STA_INFO_SIGNAL])
1193 return NL_SKIP;
1194
1195 sig_change->current_signal =
1196 (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1197
1198 if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
1199 if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1200 sinfo[NL80211_STA_INFO_TX_BITRATE],
1201 rate_policy)) {
1202 sig_change->current_txrate = 0;
1203 } else {
1204 if (rinfo[NL80211_RATE_INFO_BITRATE]) {
1205 sig_change->current_txrate =
1206 nla_get_u16(rinfo[
1207 NL80211_RATE_INFO_BITRATE]) * 100;
1208 }
1209 }
1210 }
1211
1212 return NL_SKIP;
1213 }
1214
1215
1216 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
1217 struct wpa_signal_info *sig)
1218 {
1219 struct nl_msg *msg;
1220
1221 sig->current_signal = -9999;
1222 sig->current_txrate = 0;
1223
1224 msg = nlmsg_alloc();
1225 if (!msg)
1226 return -ENOMEM;
1227
1228 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1229 0, NL80211_CMD_GET_STATION, 0);
1230
1231 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1232 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
1233
1234 return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1235 nla_put_failure:
1236 return -ENOBUFS;
1237 }
1238
1239
1240 static int get_link_noise(struct nl_msg *msg, void *arg)
1241 {
1242 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1243 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1244 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1245 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1246 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1247 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1248 };
1249 struct wpa_signal_info *sig_change = arg;
1250
1251 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1252 genlmsg_attrlen(gnlh, 0), NULL);
1253
1254 if (!tb[NL80211_ATTR_SURVEY_INFO]) {
1255 wpa_printf(MSG_DEBUG, "nl80211: survey data missing!");
1256 return NL_SKIP;
1257 }
1258
1259 if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1260 tb[NL80211_ATTR_SURVEY_INFO],
1261 survey_policy)) {
1262 wpa_printf(MSG_DEBUG, "nl80211: failed to parse nested "
1263 "attributes!");
1264 return NL_SKIP;
1265 }
1266
1267 if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1268 return NL_SKIP;
1269
1270 if (nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
1271 sig_change->frequency)
1272 return NL_SKIP;
1273
1274 if (!sinfo[NL80211_SURVEY_INFO_NOISE])
1275 return NL_SKIP;
1276
1277 sig_change->current_noise =
1278 (s8) nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1279
1280 return NL_SKIP;
1281 }
1282
1283
1284 static int nl80211_get_link_noise(struct wpa_driver_nl80211_data *drv,
1285 struct wpa_signal_info *sig_change)
1286 {
1287 struct nl_msg *msg;
1288
1289 sig_change->current_noise = 9999;
1290 sig_change->frequency = drv->assoc_freq;
1291
1292 msg = nlmsg_alloc();
1293 if (!msg)
1294 return -ENOMEM;
1295
1296 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1297 NLM_F_DUMP, NL80211_CMD_GET_SURVEY, 0);
1298
1299 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1300
1301 return send_and_recv_msgs(drv, msg, get_link_noise, sig_change);
1302 nla_put_failure:
1303 return -ENOBUFS;
1304 }
1305
1306
1307 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1308 struct nlattr *tb[])
1309 {
1310 static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1311 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1312 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1313 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1314 [NL80211_ATTR_CQM_PKT_LOSS_EVENT] = { .type = NLA_U32 },
1315 };
1316 struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1317 enum nl80211_cqm_rssi_threshold_event event;
1318 union wpa_event_data ed;
1319 struct wpa_signal_info sig;
1320 int res;
1321
1322 if (tb[NL80211_ATTR_CQM] == NULL ||
1323 nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1324 cqm_policy)) {
1325 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1326 return;
1327 }
1328
1329 os_memset(&ed, 0, sizeof(ed));
1330
1331 if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]) {
1332 if (!tb[NL80211_ATTR_MAC])
1333 return;
1334 os_memcpy(ed.low_ack.addr, nla_data(tb[NL80211_ATTR_MAC]),
1335 ETH_ALEN);
1336 wpa_supplicant_event(drv->ctx, EVENT_STATION_LOW_ACK, &ed);
1337 return;
1338 }
1339
1340 if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1341 return;
1342 event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1343
1344 if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1345 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1346 "event: RSSI high");
1347 ed.signal_change.above_threshold = 1;
1348 } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1349 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1350 "event: RSSI low");
1351 ed.signal_change.above_threshold = 0;
1352 } else
1353 return;
1354
1355 res = nl80211_get_link_signal(drv, &sig);
1356 if (res == 0) {
1357 ed.signal_change.current_signal = sig.current_signal;
1358 ed.signal_change.current_txrate = sig.current_txrate;
1359 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm txrate: %d",
1360 sig.current_signal, sig.current_txrate);
1361 }
1362
1363 res = nl80211_get_link_noise(drv, &sig);
1364 if (res == 0) {
1365 ed.signal_change.current_noise = sig.current_noise;
1366 wpa_printf(MSG_DEBUG, "nl80211: Noise: %d dBm",
1367 sig.current_noise);
1368 }
1369
1370 wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1371 }
1372
1373
1374 static void nl80211_new_station_event(struct wpa_driver_nl80211_data *drv,
1375 struct nlattr **tb)
1376 {
1377 u8 *addr;
1378 union wpa_event_data data;
1379
1380 if (tb[NL80211_ATTR_MAC] == NULL)
1381 return;
1382 addr = nla_data(tb[NL80211_ATTR_MAC]);
1383 wpa_printf(MSG_DEBUG, "nl80211: New station " MACSTR, MAC2STR(addr));
1384
1385 if (is_ap_interface(drv->nlmode) && drv->no_monitor_iface_capab) {
1386 u8 *ies = NULL;
1387 size_t ies_len = 0;
1388 if (tb[NL80211_ATTR_IE]) {
1389 ies = nla_data(tb[NL80211_ATTR_IE]);
1390 ies_len = nla_len(tb[NL80211_ATTR_IE]);
1391 }
1392 wpa_hexdump(MSG_DEBUG, "nl80211: Assoc Req IEs", ies, ies_len);
1393 drv_event_assoc(drv->ctx, addr, ies, ies_len, 0);
1394 return;
1395 }
1396
1397 if (drv->nlmode != NL80211_IFTYPE_ADHOC)
1398 return;
1399
1400 os_memset(&data, 0, sizeof(data));
1401 os_memcpy(data.ibss_rsn_start.peer, addr, ETH_ALEN);
1402 wpa_supplicant_event(drv->ctx, EVENT_IBSS_RSN_START, &data);
1403 }
1404
1405
1406 static void nl80211_del_station_event(struct wpa_driver_nl80211_data *drv,
1407 struct nlattr **tb)
1408 {
1409 u8 *addr;
1410 union wpa_event_data data;
1411
1412 if (tb[NL80211_ATTR_MAC] == NULL)
1413 return;
1414 addr = nla_data(tb[NL80211_ATTR_MAC]);
1415 wpa_printf(MSG_DEBUG, "nl80211: Delete station " MACSTR,
1416 MAC2STR(addr));
1417
1418 if (is_ap_interface(drv->nlmode) && drv->no_monitor_iface_capab) {
1419 drv_event_disassoc(drv->ctx, addr);
1420 return;
1421 }
1422
1423 if (drv->nlmode != NL80211_IFTYPE_ADHOC)
1424 return;
1425
1426 os_memset(&data, 0, sizeof(data));
1427 os_memcpy(data.ibss_peer_lost.peer, addr, ETH_ALEN);
1428 wpa_supplicant_event(drv->ctx, EVENT_IBSS_PEER_LOST, &data);
1429 }
1430
1431
1432 static void nl80211_rekey_offload_event(struct wpa_driver_nl80211_data *drv,
1433 struct nlattr **tb)
1434 {
1435 struct nlattr *rekey_info[NUM_NL80211_REKEY_DATA];
1436 static struct nla_policy rekey_policy[NUM_NL80211_REKEY_DATA] = {
1437 [NL80211_REKEY_DATA_KEK] = {
1438 .minlen = NL80211_KEK_LEN,
1439 .maxlen = NL80211_KEK_LEN,
1440 },
1441 [NL80211_REKEY_DATA_KCK] = {
1442 .minlen = NL80211_KCK_LEN,
1443 .maxlen = NL80211_KCK_LEN,
1444 },
1445 [NL80211_REKEY_DATA_REPLAY_CTR] = {
1446 .minlen = NL80211_REPLAY_CTR_LEN,
1447 .maxlen = NL80211_REPLAY_CTR_LEN,
1448 },
1449 };
1450 union wpa_event_data data;
1451
1452 if (!tb[NL80211_ATTR_MAC])
1453 return;
1454 if (!tb[NL80211_ATTR_REKEY_DATA])
1455 return;
1456 if (nla_parse_nested(rekey_info, MAX_NL80211_REKEY_DATA,
1457 tb[NL80211_ATTR_REKEY_DATA], rekey_policy))
1458 return;
1459 if (!rekey_info[NL80211_REKEY_DATA_REPLAY_CTR])
1460 return;
1461
1462 os_memset(&data, 0, sizeof(data));
1463 data.driver_gtk_rekey.bssid = nla_data(tb[NL80211_ATTR_MAC]);
1464 wpa_printf(MSG_DEBUG, "nl80211: Rekey offload event for BSSID " MACSTR,
1465 MAC2STR(data.driver_gtk_rekey.bssid));
1466 data.driver_gtk_rekey.replay_ctr =
1467 nla_data(rekey_info[NL80211_REKEY_DATA_REPLAY_CTR]);
1468 wpa_hexdump(MSG_DEBUG, "nl80211: Rekey offload - Replay Counter",
1469 data.driver_gtk_rekey.replay_ctr, NL80211_REPLAY_CTR_LEN);
1470 wpa_supplicant_event(drv->ctx, EVENT_DRIVER_GTK_REKEY, &data);
1471 }
1472
1473
1474 static void nl80211_pmksa_candidate_event(struct wpa_driver_nl80211_data *drv,
1475 struct nlattr **tb)
1476 {
1477 struct nlattr *cand[NUM_NL80211_PMKSA_CANDIDATE];
1478 static struct nla_policy cand_policy[NUM_NL80211_PMKSA_CANDIDATE] = {
1479 [NL80211_PMKSA_CANDIDATE_INDEX] = { .type = NLA_U32 },
1480 [NL80211_PMKSA_CANDIDATE_BSSID] = {
1481 .minlen = ETH_ALEN,
1482 .maxlen = ETH_ALEN,
1483 },
1484 [NL80211_PMKSA_CANDIDATE_PREAUTH] = { .type = NLA_FLAG },
1485 };
1486 union wpa_event_data data;
1487
1488 if (!tb[NL80211_ATTR_PMKSA_CANDIDATE])
1489 return;
1490 if (nla_parse_nested(cand, MAX_NL80211_PMKSA_CANDIDATE,
1491 tb[NL80211_ATTR_PMKSA_CANDIDATE], cand_policy))
1492 return;
1493 if (!cand[NL80211_PMKSA_CANDIDATE_INDEX] ||
1494 !cand[NL80211_PMKSA_CANDIDATE_BSSID])
1495 return;
1496
1497 os_memset(&data, 0, sizeof(data));
1498 os_memcpy(data.pmkid_candidate.bssid,
1499 nla_data(cand[NL80211_PMKSA_CANDIDATE_BSSID]), ETH_ALEN);
1500 data.pmkid_candidate.index =
1501 nla_get_u32(cand[NL80211_PMKSA_CANDIDATE_INDEX]);
1502 data.pmkid_candidate.preauth =
1503 cand[NL80211_PMKSA_CANDIDATE_PREAUTH] != NULL;
1504 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
1505 }
1506
1507
1508 static int process_event(struct nl_msg *msg, void *arg)
1509 {
1510 struct wpa_driver_nl80211_data *drv = arg;
1511 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1512 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1513
1514 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1515 genlmsg_attrlen(gnlh, 0), NULL);
1516
1517 if (tb[NL80211_ATTR_IFINDEX]) {
1518 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1519 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1520 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1521 " for foreign interface (ifindex %d)",
1522 gnlh->cmd, ifindex);
1523 return NL_SKIP;
1524 }
1525 }
1526
1527 if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED &&
1528 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1529 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1530 wpa_driver_nl80211_set_mode(&drv->first_bss,
1531 drv->ap_scan_as_station);
1532 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
1533 }
1534
1535 switch (gnlh->cmd) {
1536 case NL80211_CMD_TRIGGER_SCAN:
1537 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1538 break;
1539 case NL80211_CMD_START_SCHED_SCAN:
1540 wpa_printf(MSG_DEBUG, "nl80211: Sched scan started");
1541 break;
1542 case NL80211_CMD_SCHED_SCAN_STOPPED:
1543 wpa_printf(MSG_DEBUG, "nl80211: Sched scan stopped");
1544 wpa_supplicant_event(drv->ctx, EVENT_SCHED_SCAN_STOPPED, NULL);
1545 break;
1546 case NL80211_CMD_NEW_SCAN_RESULTS:
1547 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1548 drv->scan_complete_events = 1;
1549 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1550 drv->ctx);
1551 send_scan_event(drv, 0, tb);
1552 break;
1553 case NL80211_CMD_SCHED_SCAN_RESULTS:
1554 wpa_printf(MSG_DEBUG,
1555 "nl80211: New sched scan results available");
1556 send_scan_event(drv, 0, tb);
1557 break;
1558 case NL80211_CMD_SCAN_ABORTED:
1559 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1560 /*
1561 * Need to indicate that scan results are available in order
1562 * not to make wpa_supplicant stop its scanning.
1563 */
1564 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1565 drv->ctx);
1566 send_scan_event(drv, 1, tb);
1567 break;
1568 case NL80211_CMD_AUTHENTICATE:
1569 case NL80211_CMD_ASSOCIATE:
1570 case NL80211_CMD_DEAUTHENTICATE:
1571 case NL80211_CMD_DISASSOCIATE:
1572 case NL80211_CMD_FRAME:
1573 case NL80211_CMD_FRAME_TX_STATUS:
1574 case NL80211_CMD_UNPROT_DEAUTHENTICATE:
1575 case NL80211_CMD_UNPROT_DISASSOCIATE:
1576 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1577 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1578 tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1579 tb[NL80211_ATTR_COOKIE]);
1580 break;
1581 case NL80211_CMD_CONNECT:
1582 case NL80211_CMD_ROAM:
1583 mlme_event_connect(drv, gnlh->cmd,
1584 tb[NL80211_ATTR_STATUS_CODE],
1585 tb[NL80211_ATTR_MAC],
1586 tb[NL80211_ATTR_REQ_IE],
1587 tb[NL80211_ATTR_RESP_IE]);
1588 break;
1589 case NL80211_CMD_DISCONNECT:
1590 mlme_event_disconnect(drv, tb[NL80211_ATTR_REASON_CODE],
1591 tb[NL80211_ATTR_MAC]);
1592 break;
1593 case NL80211_CMD_MICHAEL_MIC_FAILURE:
1594 mlme_event_michael_mic_failure(drv, tb);
1595 break;
1596 case NL80211_CMD_JOIN_IBSS:
1597 mlme_event_join_ibss(drv, tb);
1598 break;
1599 case NL80211_CMD_REMAIN_ON_CHANNEL:
1600 mlme_event_remain_on_channel(drv, 0, tb);
1601 break;
1602 case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1603 mlme_event_remain_on_channel(drv, 1, tb);
1604 break;
1605 case NL80211_CMD_NOTIFY_CQM:
1606 nl80211_cqm_event(drv, tb);
1607 break;
1608 case NL80211_CMD_REG_CHANGE:
1609 wpa_printf(MSG_DEBUG, "nl80211: Regulatory domain change");
1610 wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
1611 NULL);
1612 break;
1613 case NL80211_CMD_REG_BEACON_HINT:
1614 wpa_printf(MSG_DEBUG, "nl80211: Regulatory beacon hint");
1615 wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
1616 NULL);
1617 break;
1618 case NL80211_CMD_NEW_STATION:
1619 nl80211_new_station_event(drv, tb);
1620 break;
1621 case NL80211_CMD_DEL_STATION:
1622 nl80211_del_station_event(drv, tb);
1623 break;
1624 case NL80211_CMD_SET_REKEY_OFFLOAD:
1625 nl80211_rekey_offload_event(drv, tb);
1626 break;
1627 case NL80211_CMD_PMKSA_CANDIDATE:
1628 nl80211_pmksa_candidate_event(drv, tb);
1629 break;
1630 default:
1631 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1632 "(cmd=%d)", gnlh->cmd);
1633 break;
1634 }
1635
1636 return NL_SKIP;
1637 }
1638
1639
1640 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1641 void *handle)
1642 {
1643 struct nl_cb *cb;
1644 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1645
1646 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1647
1648 cb = nl_cb_clone(drv->nl_cb);
1649 if (!cb)
1650 return;
1651 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1652 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1653 nl_recvmsgs(handle, cb);
1654 nl_cb_put(cb);
1655 }
1656
1657
1658 /**
1659 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1660 * @priv: driver_nl80211 private data
1661 * @alpha2_arg: country to which to switch to
1662 * Returns: 0 on success, -1 on failure
1663 *
1664 * This asks nl80211 to set the regulatory domain for given
1665 * country ISO / IEC alpha2.
1666 */
1667 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1668 {
1669 struct i802_bss *bss = priv;
1670 struct wpa_driver_nl80211_data *drv = bss->drv;
1671 char alpha2[3];
1672 struct nl_msg *msg;
1673
1674 msg = nlmsg_alloc();
1675 if (!msg)
1676 return -ENOMEM;
1677
1678 alpha2[0] = alpha2_arg[0];
1679 alpha2[1] = alpha2_arg[1];
1680 alpha2[2] = '\0';
1681
1682 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1683 0, NL80211_CMD_REQ_SET_REG, 0);
1684
1685 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1686 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1687 return -EINVAL;
1688 return 0;
1689 nla_put_failure:
1690 return -EINVAL;
1691 }
1692
1693
1694 struct wiphy_info_data {
1695 int max_scan_ssids;
1696 int max_sched_scan_ssids;
1697 int ap_supported;
1698 int p2p_supported;
1699 int p2p_concurrent;
1700 int auth_supported;
1701 int connect_supported;
1702 int offchan_tx_supported;
1703 int max_remain_on_chan;
1704 int firmware_roam;
1705 int sched_scan_supported;
1706 int max_match_sets;
1707 };
1708
1709
1710 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1711 {
1712 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1713 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1714 struct wiphy_info_data *info = arg;
1715 int p2p_go_supported = 0, p2p_client_supported = 0;
1716 static struct nla_policy
1717 iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
1718 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
1719 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
1720 [NL80211_IFACE_COMB_STA_AP_BI_MATCH] = { .type = NLA_FLAG },
1721 [NL80211_IFACE_COMB_NUM_CHANNELS] = { .type = NLA_U32 },
1722 },
1723 iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
1724 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
1725 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
1726 };
1727
1728 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1729 genlmsg_attrlen(gnlh, 0), NULL);
1730
1731 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1732 info->max_scan_ssids =
1733 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1734
1735 if (tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS])
1736 info->max_sched_scan_ssids =
1737 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS]);
1738
1739 if (tb[NL80211_ATTR_MAX_MATCH_SETS])
1740 info->max_match_sets =
1741 nla_get_u8(tb[NL80211_ATTR_MAX_MATCH_SETS]);
1742
1743 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1744 struct nlattr *nl_mode;
1745 int i;
1746 nla_for_each_nested(nl_mode,
1747 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1748 switch (nla_type(nl_mode)) {
1749 case NL80211_IFTYPE_AP:
1750 info->ap_supported = 1;
1751 break;
1752 case NL80211_IFTYPE_P2P_GO:
1753 p2p_go_supported = 1;
1754 break;
1755 case NL80211_IFTYPE_P2P_CLIENT:
1756 p2p_client_supported = 1;
1757 break;
1758 }
1759 }
1760 }
1761
1762 if (tb[NL80211_ATTR_INTERFACE_COMBINATIONS]) {
1763 struct nlattr *nl_combi;
1764 int rem_combi;
1765
1766 nla_for_each_nested(nl_combi,
1767 tb[NL80211_ATTR_INTERFACE_COMBINATIONS],
1768 rem_combi) {
1769 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
1770 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
1771 struct nlattr *nl_limit, *nl_mode;
1772 int err, rem_limit, rem_mode;
1773 int combination_has_p2p = 0, combination_has_mgd = 0;
1774
1775 err = nla_parse_nested(tb_comb, MAX_NL80211_IFACE_COMB,
1776 nl_combi,
1777 iface_combination_policy);
1778 if (err || !tb_comb[NL80211_IFACE_COMB_LIMITS] ||
1779 !tb_comb[NL80211_IFACE_COMB_MAXNUM] ||
1780 !tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS])
1781 goto broken_combination;
1782
1783 nla_for_each_nested(nl_limit,
1784 tb_comb[NL80211_IFACE_COMB_LIMITS],
1785 rem_limit) {
1786 err = nla_parse_nested(tb_limit,
1787 MAX_NL80211_IFACE_LIMIT,
1788 nl_limit,
1789 iface_limit_policy);
1790 if (err ||
1791 !tb_limit[NL80211_IFACE_LIMIT_TYPES])
1792 goto broken_combination;
1793
1794 nla_for_each_nested(
1795 nl_mode,
1796 tb_limit[NL80211_IFACE_LIMIT_TYPES],
1797 rem_mode) {
1798 int ift = nla_type(nl_mode);
1799 if (ift == NL80211_IFTYPE_P2P_GO ||
1800 ift == NL80211_IFTYPE_P2P_CLIENT)
1801 combination_has_p2p = 1;
1802 if (ift == NL80211_IFTYPE_STATION)
1803 combination_has_mgd = 1;
1804 }
1805 if (combination_has_p2p && combination_has_mgd)
1806 break;
1807 }
1808
1809 if (combination_has_p2p && combination_has_mgd) {
1810 info->p2p_concurrent = 1;
1811 break;
1812 }
1813
1814 broken_combination:
1815 ;
1816 }
1817 }
1818
1819 info->p2p_supported = p2p_go_supported && p2p_client_supported;
1820
1821 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1822 struct nlattr *nl_cmd;
1823 int i;
1824
1825 nla_for_each_nested(nl_cmd,
1826 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1827 u32 cmd = nla_get_u32(nl_cmd);
1828 if (cmd == NL80211_CMD_AUTHENTICATE)
1829 info->auth_supported = 1;
1830 else if (cmd == NL80211_CMD_CONNECT)
1831 info->connect_supported = 1;
1832 else if (cmd == NL80211_CMD_START_SCHED_SCAN)
1833 info->sched_scan_supported = 1;
1834 }
1835 }
1836
1837 if (tb[NL80211_ATTR_OFFCHANNEL_TX_OK])
1838 info->offchan_tx_supported = 1;
1839
1840 if (tb[NL80211_ATTR_ROAM_SUPPORT])
1841 info->firmware_roam = 1;
1842
1843 if (tb[NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION])
1844 info->max_remain_on_chan =
1845 nla_get_u32(tb[NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION]);
1846
1847 return NL_SKIP;
1848 }
1849
1850
1851 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1852 struct wiphy_info_data *info)
1853 {
1854 struct nl_msg *msg;
1855
1856 os_memset(info, 0, sizeof(*info));
1857
1858 /* default to 5000 since early versions of mac80211 don't set it */
1859 info->max_remain_on_chan = 5000;
1860
1861 msg = nlmsg_alloc();
1862 if (!msg)
1863 return -1;
1864
1865 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1866 0, NL80211_CMD_GET_WIPHY, 0);
1867
1868 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1869
1870 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1871 return 0;
1872 msg = NULL;
1873 nla_put_failure:
1874 nlmsg_free(msg);
1875 return -1;
1876 }
1877
1878
1879 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1880 {
1881 struct wiphy_info_data info;
1882 if (wpa_driver_nl80211_get_info(drv, &info))
1883 return -1;
1884 drv->has_capability = 1;
1885 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1886 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1887 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1888 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1889 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1890 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1891 WPA_DRIVER_CAPA_ENC_WEP104 |
1892 WPA_DRIVER_CAPA_ENC_TKIP |
1893 WPA_DRIVER_CAPA_ENC_CCMP;
1894 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1895 WPA_DRIVER_AUTH_SHARED |
1896 WPA_DRIVER_AUTH_LEAP;
1897
1898 drv->capa.max_scan_ssids = info.max_scan_ssids;
1899 drv->capa.max_sched_scan_ssids = info.max_sched_scan_ssids;
1900 drv->capa.sched_scan_supported = info.sched_scan_supported;
1901 drv->capa.max_match_sets = info.max_match_sets;
1902
1903 if (info.ap_supported)
1904 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1905
1906 if (info.auth_supported)
1907 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1908 else if (!info.connect_supported) {
1909 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1910 "authentication/association or connect commands");
1911 return -1;
1912 }
1913
1914 if (info.offchan_tx_supported) {
1915 wpa_printf(MSG_DEBUG, "nl80211: Using driver-based "
1916 "off-channel TX");
1917 drv->capa.flags |= WPA_DRIVER_FLAGS_OFFCHANNEL_TX;
1918 }
1919
1920 if (info.firmware_roam) {
1921 wpa_printf(MSG_DEBUG, "nl80211: Using driver-based roaming");
1922 drv->capa.flags |= WPA_DRIVER_FLAGS_BSS_SELECTION;
1923 }
1924
1925 drv->capa.flags |= WPA_DRIVER_FLAGS_SANE_ERROR_CODES;
1926 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1927 if (info.p2p_supported)
1928 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1929 if (info.p2p_concurrent) {
1930 wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
1931 "interface (driver advertised support)");
1932 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
1933 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
1934 }
1935 drv->capa.flags |= WPA_DRIVER_FLAGS_EAPOL_TX_STATUS;
1936 drv->capa.flags |= WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS;
1937 drv->capa.max_remain_on_chan = info.max_remain_on_chan;
1938
1939 return 0;
1940 }
1941
1942
1943 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1944 {
1945 int ret;
1946
1947 /* Initialize generic netlink and nl80211 */
1948
1949 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1950 if (drv->nl_cb == NULL) {
1951 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1952 "callbacks");
1953 goto err1;
1954 }
1955
1956 drv->nl_handle = nl80211_handle_alloc(drv->nl_cb);
1957 if (drv->nl_handle == NULL) {
1958 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1959 "callbacks");
1960 goto err2;
1961 }
1962
1963 drv->nl_handle_event = nl80211_handle_alloc(drv->nl_cb);
1964 if (drv->nl_handle_event == NULL) {
1965 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1966 "callbacks (event)");
1967 goto err2b;
1968 }
1969
1970 if (genl_connect(drv->nl_handle)) {
1971 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1972 "netlink");
1973 goto err3;
1974 }
1975
1976 if (genl_connect(drv->nl_handle_event)) {
1977 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1978 "netlink (event)");
1979 goto err3;
1980 }
1981
1982 #ifdef CONFIG_LIBNL20
1983 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1984 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1985 "netlink cache");
1986 goto err3;
1987 }
1988 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1989 0) {
1990 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1991 "netlink cache (event)");
1992 goto err3b;
1993 }
1994 #else /* CONFIG_LIBNL20 */
1995 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1996 if (drv->nl_cache == NULL) {
1997 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1998 "netlink cache");
1999 goto err3;
2000 }
2001 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
2002 if (drv->nl_cache_event == NULL) {
2003 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
2004 "netlink cache (event)");
2005 goto err3b;
2006 }
2007 #endif /* CONFIG_LIBNL20 */
2008
2009 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2010 if (drv->nl80211 == NULL) {
2011 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
2012 "found");
2013 goto err4;
2014 }
2015
2016 ret = nl_get_multicast_id(drv, "nl80211", "scan");
2017 if (ret >= 0)
2018 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
2019 if (ret < 0) {
2020 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
2021 "membership for scan events: %d (%s)",
2022 ret, strerror(-ret));
2023 goto err4;
2024 }
2025
2026 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
2027 if (ret >= 0)
2028 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
2029 if (ret < 0) {
2030 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
2031 "membership for mlme events: %d (%s)",
2032 ret, strerror(-ret));
2033 goto err4;
2034 }
2035
2036 ret = nl_get_multicast_id(drv, "nl80211", "regulatory");
2037 if (ret >= 0)
2038 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
2039 if (ret < 0) {
2040 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
2041 "membership for regulatory events: %d (%s)",
2042 ret, strerror(-ret));
2043 /* Continue without regulatory events */
2044 }
2045
2046 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
2047 wpa_driver_nl80211_event_receive, drv,
2048 drv->nl_handle_event);
2049
2050 return 0;
2051
2052 err4:
2053 nl_cache_free(drv->nl_cache_event);
2054 err3b:
2055 nl_cache_free(drv->nl_cache);
2056 err3:
2057 nl80211_handle_destroy(drv->nl_handle_event);
2058 err2b:
2059 nl80211_handle_destroy(drv->nl_handle);
2060 err2:
2061 nl_cb_put(drv->nl_cb);
2062 err1:
2063 return -1;
2064 }
2065
2066
2067 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
2068 {
2069 wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
2070 /*
2071 * This may be for any interface; use ifdown event to disable
2072 * interface.
2073 */
2074 }
2075
2076
2077 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
2078 {
2079 struct wpa_driver_nl80211_data *drv = ctx;
2080 wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
2081 if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
2082 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
2083 "after rfkill unblock");
2084 return;
2085 }
2086 /* rtnetlink ifup handler will report interface as enabled */
2087 }
2088
2089
2090 static void nl80211_get_phy_name(struct wpa_driver_nl80211_data *drv)
2091 {
2092 /* Find phy (radio) to which this interface belongs */
2093 char buf[90], *pos;
2094 int f, rv;
2095
2096 drv->phyname[0] = '\0';
2097 snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
2098 drv->first_bss.ifname);
2099 f = open(buf, O_RDONLY);
2100 if (f < 0) {
2101 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
2102 buf, strerror(errno));
2103 return;
2104 }
2105
2106 rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
2107 close(f);
2108 if (rv < 0) {
2109 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
2110 buf, strerror(errno));
2111 return;
2112 }
2113
2114 drv->phyname[rv] = '\0';
2115 pos = os_strchr(drv->phyname, '\n');
2116 if (pos)
2117 *pos = '\0';
2118 wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
2119 drv->first_bss.ifname, drv->phyname);
2120 }
2121
2122
2123 #ifdef CONFIG_AP
2124 static void nl80211_l2_read(void *ctx, const u8 *src_addr, const u8 *buf,
2125 size_t len)
2126 {
2127 wpa_printf(MSG_DEBUG, "nl80211: l2_packet read %u",
2128 (unsigned int) len);
2129 }
2130 #endif /* CONFIG_AP */
2131
2132
2133 /**
2134 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
2135 * @ctx: context to be used when calling wpa_supplicant functions,
2136 * e.g., wpa_supplicant_event()
2137 * @ifname: interface name, e.g., wlan0
2138 * @global_priv: private driver global data from global_init()
2139 * Returns: Pointer to private data, %NULL on failure
2140 */
2141 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
2142 void *global_priv)
2143 {
2144 struct wpa_driver_nl80211_data *drv;
2145 struct netlink_config *cfg;
2146 struct rfkill_config *rcfg;
2147 struct i802_bss *bss;
2148
2149 drv = os_zalloc(sizeof(*drv));
2150 if (drv == NULL)
2151 return NULL;
2152 drv->global = global_priv;
2153 drv->ctx = ctx;
2154 bss = &drv->first_bss;
2155 bss->drv = drv;
2156 os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
2157 drv->monitor_ifidx = -1;
2158 drv->monitor_sock = -1;
2159 drv->ioctl_sock = -1;
2160 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
2161
2162 if (wpa_driver_nl80211_init_nl(drv)) {
2163 os_free(drv);
2164 return NULL;
2165 }
2166
2167 nl80211_get_phy_name(drv);
2168
2169 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
2170 if (drv->ioctl_sock < 0) {
2171 perror("socket(PF_INET,SOCK_DGRAM)");
2172 goto failed;
2173 }
2174
2175 cfg = os_zalloc(sizeof(*cfg));
2176 if (cfg == NULL)
2177 goto failed;
2178 cfg->ctx = drv;
2179 cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
2180 cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
2181 drv->netlink = netlink_init(cfg);
2182 if (drv->netlink == NULL) {
2183 os_free(cfg);
2184 goto failed;
2185 }
2186
2187 rcfg = os_zalloc(sizeof(*rcfg));
2188 if (rcfg == NULL)
2189 goto failed;
2190 rcfg->ctx = drv;
2191 os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
2192 rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
2193 rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
2194 drv->rfkill = rfkill_init(rcfg);
2195 if (drv->rfkill == NULL) {
2196 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
2197 os_free(rcfg);
2198 }
2199
2200 if (wpa_driver_nl80211_finish_drv_init(drv))
2201 goto failed;
2202
2203 #ifdef CONFIG_AP
2204 drv->l2 = l2_packet_init(ifname, NULL, ETH_P_EAPOL,
2205 nl80211_l2_read, drv, 0);
2206 #endif /* CONFIG_AP */
2207
2208 if (drv->global)
2209 dl_list_add(&drv->global->interfaces, &drv->list);
2210
2211 return bss;
2212
2213 failed:
2214 rfkill_deinit(drv->rfkill);
2215 netlink_deinit(drv->netlink);
2216 if (drv->ioctl_sock >= 0)
2217 close(drv->ioctl_sock);
2218
2219 genl_family_put(drv->nl80211);
2220 nl_cache_free(drv->nl_cache);
2221 nl80211_handle_destroy(drv->nl_handle);
2222 nl_cb_put(drv->nl_cb);
2223 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
2224
2225 os_free(drv);
2226 return NULL;
2227 }
2228
2229
2230 static int nl80211_register_frame(struct wpa_driver_nl80211_data *drv,
2231 struct nl_handle *nl_handle,
2232 u16 type, const u8 *match, size_t match_len)
2233 {
2234 struct nl_msg *msg;
2235 int ret = -1;
2236
2237 msg = nlmsg_alloc();
2238 if (!msg)
2239 return -1;
2240
2241 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2242 NL80211_CMD_REGISTER_ACTION, 0);
2243
2244 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2245 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, type);
2246 NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
2247
2248 ret = send_and_recv(drv, nl_handle, msg, NULL, NULL);
2249 msg = NULL;
2250 if (ret) {
2251 wpa_printf(MSG_DEBUG, "nl80211: Register frame command "
2252 "failed (type=%u): ret=%d (%s)",
2253 type, ret, strerror(-ret));
2254 wpa_hexdump(MSG_DEBUG, "nl80211: Register frame match",
2255 match, match_len);
2256 goto nla_put_failure;
2257 }
2258 ret = 0;
2259 nla_put_failure:
2260 nlmsg_free(msg);
2261 return ret;
2262 }
2263
2264
2265 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
2266 const u8 *match, size_t match_len)
2267 {
2268 u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
2269 return nl80211_register_frame(drv, drv->nl_handle_event,
2270 type, match, match_len);
2271 }
2272
2273
2274 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
2275 {
2276 #if defined(CONFIG_P2P) || defined(CONFIG_INTERWORKING)
2277 /* GAS Initial Request */
2278 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
2279 return -1;
2280 /* GAS Initial Response */
2281 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
2282 return -1;
2283 /* GAS Comeback Request */
2284 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
2285 return -1;
2286 /* GAS Comeback Response */
2287 if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
2288 return -1;
2289 #endif /* CONFIG_P2P || CONFIG_INTERWORKING */
2290 #ifdef CONFIG_P2P
2291 /* P2P Public Action */
2292 if (nl80211_register_action_frame(drv,
2293 (u8 *) "\x04\x09\x50\x6f\x9a\x09",
2294 6) < 0)
2295 return -1;
2296 /* P2P Action */
2297 if (nl80211_register_action_frame(drv,
2298 (u8 *) "\x7f\x50\x6f\x9a\x09",
2299 5) < 0)
2300 return -1;
2301 #endif /* CONFIG_P2P */
2302 #ifdef CONFIG_IEEE80211W
2303 /* SA Query Response */
2304 if (nl80211_register_action_frame(drv, (u8 *) "\x08\x01", 2) < 0)
2305 return -1;
2306 #endif /* CONFIG_IEEE80211W */
2307
2308 /* FT Action frames */
2309 if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
2310 return -1;
2311 else
2312 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
2313 WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
2314
2315 /* WNM - BSS Transition Management Request */
2316 if (nl80211_register_action_frame(drv, (u8 *) "\x0a\x07", 2) < 0)
2317 return -1;
2318
2319 return 0;
2320 }
2321
2322
2323 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
2324 {
2325 wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
2326 }
2327
2328
2329 static int
2330 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
2331 {
2332 struct i802_bss *bss = &drv->first_bss;
2333 int send_rfkill_event = 0;
2334
2335 drv->ifindex = if_nametoindex(bss->ifname);
2336 drv->first_bss.ifindex = drv->ifindex;
2337
2338 #ifndef HOSTAPD
2339 /*
2340 * Make sure the interface starts up in station mode unless this is a
2341 * dynamically added interface (e.g., P2P) that was already configured
2342 * with proper iftype.
2343 */
2344 if ((drv->global == NULL ||
2345 drv->ifindex != drv->global->if_add_ifindex) &&
2346 wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION) < 0) {
2347 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
2348 "use managed mode");
2349 }
2350
2351 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
2352 if (rfkill_is_blocked(drv->rfkill)) {
2353 wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
2354 "interface '%s' due to rfkill",
2355 bss->ifname);
2356 drv->if_disabled = 1;
2357 send_rfkill_event = 1;
2358 } else {
2359 wpa_printf(MSG_ERROR, "nl80211: Could not set "
2360 "interface '%s' UP", bss->ifname);
2361 return -1;
2362 }
2363 }
2364
2365 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
2366 1, IF_OPER_DORMANT);
2367 #endif /* HOSTAPD */
2368
2369 if (wpa_driver_nl80211_capa(drv))
2370 return -1;
2371
2372 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, drv->addr))
2373 return -1;
2374
2375 if (nl80211_register_action_frames(drv) < 0) {
2376 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
2377 "frame processing - ignore for now");
2378 /*
2379 * Older kernel versions did not support this, so ignore the
2380 * error for now. Some functionality may not be available
2381 * because of this.
2382 */
2383 }
2384
2385 if (send_rfkill_event) {
2386 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
2387 drv, drv->ctx);
2388 }
2389
2390 return 0;
2391 }
2392
2393
2394 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
2395 {
2396 struct nl_msg *msg;
2397
2398 msg = nlmsg_alloc();
2399 if (!msg)
2400 return -ENOMEM;
2401
2402 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2403 0, NL80211_CMD_DEL_BEACON, 0);
2404 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2405
2406 return send_and_recv_msgs(drv, msg, NULL, NULL);
2407 nla_put_failure:
2408 return -ENOBUFS;
2409 }
2410
2411
2412 /**
2413 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
2414 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
2415 *
2416 * Shut down driver interface and processing of driver events. Free
2417 * private data buffer if one was allocated in wpa_driver_nl80211_init().
2418 */
2419 static void wpa_driver_nl80211_deinit(void *priv)
2420 {
2421 struct i802_bss *bss = priv;
2422 struct wpa_driver_nl80211_data *drv = bss->drv;
2423
2424 #ifdef CONFIG_AP
2425 if (drv->l2)
2426 l2_packet_deinit(drv->l2);
2427 #endif /* CONFIG_AP */
2428
2429 if (drv->nl_handle_preq)
2430 wpa_driver_nl80211_probe_req_report(bss, 0);
2431 if (bss->added_if_into_bridge) {
2432 if (linux_br_del_if(drv->ioctl_sock, bss->brname, bss->ifname)
2433 < 0)
2434 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
2435 "interface %s from bridge %s: %s",
2436 bss->ifname, bss->brname, strerror(errno));
2437 }
2438 if (bss->added_bridge) {
2439 if (linux_br_del(drv->ioctl_sock, bss->brname) < 0)
2440 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
2441 "bridge %s: %s",
2442 bss->brname, strerror(errno));
2443 }
2444
2445 nl80211_remove_monitor_interface(drv);
2446
2447 if (is_ap_interface(drv->nlmode))
2448 wpa_driver_nl80211_del_beacon(drv);
2449
2450 #ifdef HOSTAPD
2451 if (drv->last_freq_ht) {
2452 /* Clear HT flags from the driver */
2453 struct hostapd_freq_params freq;
2454 os_memset(&freq, 0, sizeof(freq));
2455 freq.freq = drv->last_freq;
2456 i802_set_freq(priv, &freq);
2457 }
2458
2459 if (drv->eapol_sock >= 0) {
2460 eloop_unregister_read_sock(drv->eapol_sock);
2461 close(drv->eapol_sock);
2462 }
2463
2464 if (drv->if_indices != drv->default_if_indices)
2465 os_free(drv->if_indices);
2466 #endif /* HOSTAPD */
2467
2468 if (drv->disable_11b_rates)
2469 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
2470
2471 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
2472 netlink_deinit(drv->netlink);
2473 rfkill_deinit(drv->rfkill);
2474
2475 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
2476
2477 (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
2478 wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION);
2479
2480 if (drv->ioctl_sock >= 0)
2481 close(drv->ioctl_sock);
2482
2483 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
2484 genl_family_put(drv->nl80211);
2485 nl_cache_free(drv->nl_cache);
2486 nl_cache_free(drv->nl_cache_event);
2487 nl80211_handle_destroy(drv->nl_handle);
2488 nl80211_handle_destroy(drv->nl_handle_event);
2489 nl_cb_put(drv->nl_cb);
2490
2491 os_free(drv->filter_ssids);
2492
2493 if (drv->global)
2494 dl_list_del(&drv->list);
2495
2496 os_free(drv);
2497 }
2498
2499
2500 /**
2501 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
2502 * @eloop_ctx: Driver private data
2503 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
2504 *
2505 * This function can be used as registered timeout when starting a scan to
2506 * generate a scan completed event if the driver does not report this.
2507 */
2508 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
2509 {
2510 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2511 if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED) {
2512 wpa_driver_nl80211_set_mode(&drv->first_bss,
2513 drv->ap_scan_as_station);
2514 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
2515 }
2516 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
2517 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
2518 }
2519
2520
2521 /**
2522 * wpa_driver_nl80211_scan - Request the driver to initiate scan
2523 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2524 * @params: Scan parameters
2525 * Returns: 0 on success, -1 on failure
2526 */
2527 static int wpa_driver_nl80211_scan(void *priv,
2528 struct wpa_driver_scan_params *params)
2529 {
2530 struct i802_bss *bss = priv;
2531 struct wpa_driver_nl80211_data *drv = bss->drv;
2532 int ret = 0, timeout;
2533 struct nl_msg *msg, *ssids, *freqs, *rates;
2534 size_t i;
2535
2536 msg = nlmsg_alloc();
2537 ssids = nlmsg_alloc();
2538 freqs = nlmsg_alloc();
2539 rates = nlmsg_alloc();
2540 if (!msg || !ssids || !freqs || !rates) {
2541 nlmsg_free(msg);
2542 nlmsg_free(ssids);
2543 nlmsg_free(freqs);
2544 nlmsg_free(rates);
2545 return -1;
2546 }
2547
2548 os_free(drv->filter_ssids);
2549 drv->filter_ssids = params->filter_ssids;
2550 params->filter_ssids = NULL;
2551 drv->num_filter_ssids = params->num_filter_ssids;
2552
2553 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2554 NL80211_CMD_TRIGGER_SCAN, 0);
2555
2556 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2557
2558 for (i = 0; i < params->num_ssids; i++) {
2559 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
2560 params->ssids[i].ssid,
2561 params->ssids[i].ssid_len);
2562 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
2563 params->ssids[i].ssid);
2564 }
2565 if (params->num_ssids)
2566 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
2567
2568 if (params->extra_ies) {
2569 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
2570 params->extra_ies, params->extra_ies_len);
2571 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
2572 params->extra_ies);
2573 }
2574
2575 if (params->freqs) {
2576 for (i = 0; params->freqs[i]; i++) {
2577 wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
2578 "MHz", params->freqs[i]);
2579 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
2580 }
2581 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
2582 }
2583
2584 if (params->p2p_probe) {
2585 /*
2586 * Remove 2.4 GHz rates 1, 2, 5.5, 11 Mbps from supported rates
2587 * by masking out everything else apart from the OFDM rates 6,
2588 * 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS rates. All 5 GHz
2589 * rates are left enabled.
2590 */
2591 NLA_PUT(rates, NL80211_BAND_2GHZ, 8,
2592 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
2593 nla_put_nested(msg, NL80211_ATTR_SCAN_SUPP_RATES, rates);
2594 }
2595
2596 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2597 msg = NULL;
2598 if (ret) {
2599 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
2600 "(%s)", ret, strerror(-ret));
2601 #ifdef HOSTAPD
2602 if (is_ap_interface(drv->nlmode)) {
2603 /*
2604 * mac80211 does not allow scan requests in AP mode, so
2605 * try to do this in station mode.
2606 */
2607 if (wpa_driver_nl80211_set_mode(
2608 bss, NL80211_IFTYPE_STATION))
2609 goto nla_put_failure;
2610
2611 if (wpa_driver_nl80211_scan(drv, params)) {
2612 wpa_driver_nl80211_set_mode(bss, drv->nlmode);
2613 goto nla_put_failure;
2614 }
2615
2616 /* Restore AP mode when processing scan results */
2617 drv->ap_scan_as_station = drv->nlmode;
2618 ret = 0;
2619 } else
2620 goto nla_put_failure;
2621 #else /* HOSTAPD */
2622 goto nla_put_failure;
2623 #endif /* HOSTAPD */
2624 }
2625
2626 /* Not all drivers generate "scan completed" wireless event, so try to
2627 * read results after a timeout. */
2628 timeout = 10;
2629 if (drv->scan_complete_events) {
2630 /*
2631 * The driver seems to deliver events to notify when scan is
2632 * complete, so use longer timeout to avoid race conditions
2633 * with scanning and following association request.
2634 */
2635 timeout = 30;
2636 }
2637 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
2638 "seconds", ret, timeout);
2639 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
2640 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
2641 drv, drv->ctx);
2642
2643 nla_put_failure:
2644 nlmsg_free(ssids);
2645 nlmsg_free(msg);
2646 nlmsg_free(freqs);
2647 nlmsg_free(rates);
2648 return ret;
2649 }
2650
2651
2652 /**
2653 * wpa_driver_nl80211_sched_scan - Initiate a scheduled scan
2654 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2655 * @params: Scan parameters
2656 * @interval: Interval between scan cycles in milliseconds
2657 * Returns: 0 on success, -1 on failure or if not supported
2658 */
2659 static int wpa_driver_nl80211_sched_scan(void *priv,
2660 struct wpa_driver_scan_params *params,
2661 u32 interval)
2662 {
2663 struct i802_bss *bss = priv;
2664 struct wpa_driver_nl80211_data *drv = bss->drv;
2665 int ret = 0;
2666 struct nl_msg *msg, *ssids, *freqs, *match_set_ssid, *match_sets;
2667 size_t i;
2668
2669 msg = nlmsg_alloc();
2670 ssids = nlmsg_alloc();
2671 freqs = nlmsg_alloc();
2672 if (!msg || !ssids || !freqs) {
2673 nlmsg_free(msg);
2674 nlmsg_free(ssids);
2675 nlmsg_free(freqs);
2676 return -1;
2677 }
2678
2679 os_free(drv->filter_ssids);
2680 drv->filter_ssids = params->filter_ssids;
2681 params->filter_ssids = NULL;
2682 drv->num_filter_ssids = params->num_filter_ssids;
2683
2684 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2685 NL80211_CMD_START_SCHED_SCAN, 0);
2686
2687 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2688
2689 NLA_PUT_U32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL, interval);
2690
2691 if (drv->num_filter_ssids) {
2692 match_sets = nlmsg_alloc();
2693
2694 for (i = 0; i < drv->num_filter_ssids; i++) {
2695 wpa_hexdump_ascii(MSG_MSGDUMP,
2696 "nl80211: Sched scan filter SSID",
2697 drv->filter_ssids[i].ssid,
2698 drv->filter_ssids[i].ssid_len);
2699
2700 match_set_ssid = nlmsg_alloc();
2701 nla_put(match_set_ssid,
2702 NL80211_ATTR_SCHED_SCAN_MATCH_SSID,
2703 drv->filter_ssids[i].ssid_len,
2704 drv->filter_ssids[i].ssid);
2705
2706 nla_put_nested(match_sets, i + 1, match_set_ssid);
2707
2708 nlmsg_free(match_set_ssid);
2709 }
2710
2711 nla_put_nested(msg, NL80211_ATTR_SCHED_SCAN_MATCH,
2712 match_sets);
2713 nlmsg_free(match_sets);
2714 }
2715
2716 for (i = 0; i < params->num_ssids; i++) {
2717 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan SSID",
2718 params->ssids[i].ssid,
2719 params->ssids[i].ssid_len);
2720 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
2721 params->ssids[i].ssid);
2722 }
2723 if (params->num_ssids)
2724 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
2725
2726 if (params->extra_ies) {
2727 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan extra IEs",
2728 params->extra_ies, params->extra_ies_len);
2729 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
2730 params->extra_ies);
2731 }
2732
2733 if (params->freqs) {
2734 for (i = 0; params->freqs[i]; i++) {
2735 wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
2736 "MHz", params->freqs[i]);
2737 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
2738 }
2739 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
2740 }
2741
2742 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2743
2744 /* TODO: if we get an error here, we should fall back to normal scan */
2745
2746 msg = NULL;
2747 if (ret) {
2748 wpa_printf(MSG_DEBUG, "nl80211: Sched scan start failed: "
2749 "ret=%d (%s)", ret, strerror(-ret));
2750 goto nla_put_failure;
2751 }
2752
2753 wpa_printf(MSG_DEBUG, "nl80211: Sched scan requested (ret=%d) - "
2754 "scan interval %d msec", ret, interval);
2755
2756 nla_put_failure:
2757 nlmsg_free(ssids);
2758 nlmsg_free(msg);
2759 nlmsg_free(freqs);
2760 return ret;
2761 }
2762
2763
2764 /**
2765 * wpa_driver_nl80211_stop_sched_scan - Stop a scheduled scan
2766 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2767 * Returns: 0 on success, -1 on failure or if not supported
2768 */
2769 static int wpa_driver_nl80211_stop_sched_scan(void *priv)
2770 {
2771 struct i802_bss *bss = priv;
2772 struct wpa_driver_nl80211_data *drv = bss->drv;
2773 int ret = 0;
2774 struct nl_msg *msg;
2775
2776 msg = nlmsg_alloc();
2777 if (!msg)
2778 return -1;
2779
2780 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2781 NL80211_CMD_STOP_SCHED_SCAN, 0);
2782
2783 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2784
2785 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2786 msg = NULL;
2787 if (ret) {
2788 wpa_printf(MSG_DEBUG, "nl80211: Sched scan stop failed: "
2789 "ret=%d (%s)", ret, strerror(-ret));
2790 goto nla_put_failure;
2791 }
2792
2793 wpa_printf(MSG_DEBUG, "nl80211: Sched scan stop sent (ret=%d)", ret);
2794
2795 nla_put_failure:
2796 nlmsg_free(msg);
2797 return ret;
2798 }
2799
2800
2801 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
2802 {
2803 const u8 *end, *pos;
2804
2805 if (ies == NULL)
2806 return NULL;
2807
2808 pos = ies;
2809 end = ies + ies_len;
2810
2811 while (pos + 1 < end) {
2812 if (pos + 2 + pos[1] > end)
2813 break;
2814 if (pos[0] == ie)
2815 return pos;
2816 pos += 2 + pos[1];
2817 }
2818
2819 return NULL;
2820 }
2821
2822
2823 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
2824 const u8 *ie, size_t ie_len)
2825 {
2826 const u8 *ssid;
2827 size_t i;
2828
2829 if (drv->filter_ssids == NULL)
2830 return 0;
2831
2832 ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
2833 if (ssid == NULL)
2834 return 1;
2835
2836 for (i = 0; i < drv->num_filter_ssids; i++) {
2837 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
2838 os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
2839 0)
2840 return 0;
2841 }
2842
2843 return 1;
2844 }
2845
2846
2847 static int bss_info_handler(struct nl_msg *msg, void *arg)
2848 {
2849 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2850 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2851 struct nlattr *bss[NL80211_BSS_MAX + 1];
2852 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2853 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
2854 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2855 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2856 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2857 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2858 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
2859 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2860 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2861 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2862 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2863 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
2864 };
2865 struct nl80211_bss_info_arg *_arg = arg;
2866 struct wpa_scan_results *res = _arg->res;
2867 struct wpa_scan_res **tmp;
2868 struct wpa_scan_res *r;
2869 const u8 *ie, *beacon_ie;
2870 size_t ie_len, beacon_ie_len;
2871 u8 *pos;
2872 size_t i;
2873
2874 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2875 genlmsg_attrlen(gnlh, 0), NULL);
2876 if (!tb[NL80211_ATTR_BSS])
2877 return NL_SKIP;
2878 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2879 bss_policy))
2880 return NL_SKIP;
2881 if (bss[NL80211_BSS_STATUS]) {
2882 enum nl80211_bss_status status;
2883 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2884 if (status == NL80211_BSS_STATUS_ASSOCIATED &&
2885 bss[NL80211_BSS_FREQUENCY]) {
2886 _arg->assoc_freq =
2887 nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2888 wpa_printf(MSG_DEBUG, "nl80211: Associated on %u MHz",
2889 _arg->assoc_freq);
2890 }
2891 if (status == NL80211_BSS_STATUS_ASSOCIATED &&
2892 bss[NL80211_BSS_BSSID]) {
2893 os_memcpy(_arg->assoc_bssid,
2894 nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
2895 wpa_printf(MSG_DEBUG, "nl80211: Associated with "
2896 MACSTR, MAC2STR(_arg->assoc_bssid));
2897 }
2898 }
2899 if (!res)
2900 return NL_SKIP;
2901 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2902 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2903 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2904 } else {
2905 ie = NULL;
2906 ie_len = 0;
2907 }
2908 if (bss[NL80211_BSS_BEACON_IES]) {
2909 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2910 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2911 } else {
2912 beacon_ie = NULL;
2913 beacon_ie_len = 0;
2914 }
2915
2916 if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2917 ie ? ie_len : beacon_ie_len))
2918 return NL_SKIP;
2919
2920 r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2921 if (r == NULL)
2922 return NL_SKIP;
2923 if (bss[NL80211_BSS_BSSID])
2924 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2925 ETH_ALEN);
2926 if (bss[NL80211_BSS_FREQUENCY])
2927 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2928 if (bss[NL80211_BSS_BEACON_INTERVAL])
2929 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2930 if (bss[NL80211_BSS_CAPABILITY])
2931 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2932 r->flags |= WPA_SCAN_NOISE_INVALID;
2933 if (bss[NL80211_BSS_SIGNAL_MBM]) {
2934 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2935 r->level /= 100; /* mBm to dBm */
2936 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2937 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2938 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2939 r->flags |= WPA_SCAN_LEVEL_INVALID;
2940 } else
2941 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2942 if (bss[NL80211_BSS_TSF])
2943 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2944 if (bss[NL80211_BSS_SEEN_MS_AGO])
2945 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2946 r->ie_len = ie_len;
2947 pos = (u8 *) (r + 1);
2948 if (ie) {
2949 os_memcpy(pos, ie, ie_len);
2950 pos += ie_len;
2951 }
2952 r->beacon_ie_len = beacon_ie_len;
2953 if (beacon_ie)
2954 os_memcpy(pos, beacon_ie, beacon_ie_len);
2955
2956 if (bss[NL80211_BSS_STATUS]) {
2957 enum nl80211_bss_status status;
2958 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2959 switch (status) {
2960 case NL80211_BSS_STATUS_AUTHENTICATED:
2961 r->flags |= WPA_SCAN_AUTHENTICATED;
2962 break;
2963 case NL80211_BSS_STATUS_ASSOCIATED:
2964 r->flags |= WPA_SCAN_ASSOCIATED;
2965 break;
2966 default:
2967 break;
2968 }
2969 }
2970
2971 /*
2972 * cfg80211 maintains separate BSS table entries for APs if the same
2973 * BSSID,SSID pair is seen on multiple channels. wpa_supplicant does
2974 * not use frequency as a separate key in the BSS table, so filter out
2975 * duplicated entries. Prefer associated BSS entry in such a case in
2976 * order to get the correct frequency into the BSS table.
2977 */
2978 for (i = 0; i < res->num; i++) {
2979 const u8 *s1, *s2;
2980 if (os_memcmp(res->res[i]->bssid, r->bssid, ETH_ALEN) != 0)
2981 continue;
2982
2983 s1 = nl80211_get_ie((u8 *) (res->res[i] + 1),
2984 res->res[i]->ie_len, WLAN_EID_SSID);
2985 s2 = nl80211_get_ie((u8 *) (r + 1), r->ie_len, WLAN_EID_SSID);
2986 if (s1 == NULL || s2 == NULL || s1[1] != s2[1] ||
2987 os_memcmp(s1, s2, 2 + s1[1]) != 0)
2988 continue;
2989
2990 /* Same BSSID,SSID was already included in scan results */
2991 wpa_printf(MSG_DEBUG, "nl80211: Remove duplicated scan result "
2992 "for " MACSTR, MAC2STR(r->bssid));
2993
2994 if ((r->flags & WPA_SCAN_ASSOCIATED) &&
2995 !(res->res[i]->flags & WPA_SCAN_ASSOCIATED)) {
2996 os_free(res->res[i]);
2997 res->res[i] = r;
2998 } else
2999 os_free(r);
3000 return NL_SKIP;
3001 }
3002
3003 tmp = os_realloc(res->res,
3004 (res->num + 1) * sizeof(struct wpa_scan_res *));
3005 if (tmp == NULL) {
3006 os_free(r);
3007 return NL_SKIP;
3008 }
3009 tmp[res->num++] = r;
3010 res->res = tmp;
3011
3012 return NL_SKIP;
3013 }
3014
3015
3016 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
3017 const u8 *addr)
3018 {
3019 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
3020 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
3021 "mismatch (" MACSTR ")", MAC2STR(addr));
3022 wpa_driver_nl80211_mlme(drv, addr,
3023 NL80211_CMD_DEAUTHENTICATE,
3024 WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
3025 }
3026 }
3027
3028
3029 static void wpa_driver_nl80211_check_bss_status(
3030 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
3031 {
3032 size_t i;
3033
3034 for (i = 0; i < res->num; i++) {
3035 struct wpa_scan_res *r = res->res[i];
3036 if (r->flags & WPA_SCAN_AUTHENTICATED) {
3037 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
3038 "indicates BSS status with " MACSTR
3039 " as authenticated",
3040 MAC2STR(r->bssid));
3041 if (is_sta_interface(drv->nlmode) &&
3042 os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
3043 os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
3044 0) {
3045 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
3046 " in local state (auth=" MACSTR
3047 " assoc=" MACSTR ")",
3048 MAC2STR(drv->auth_bssid),
3049 MAC2STR(drv->bssid));
3050 clear_state_mismatch(drv, r->bssid);
3051 }
3052 }
3053
3054 if (r->flags & WPA_SCAN_ASSOCIATED) {
3055 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
3056 "indicate BSS status with " MACSTR
3057 " as associated",
3058 MAC2STR(r->bssid));
3059 if (is_sta_interface(drv->nlmode) &&
3060 !drv->associated) {
3061 wpa_printf(MSG_DEBUG, "nl80211: Local state "
3062 "(not associated) does not match "
3063 "with BSS state");
3064 clear_state_mismatch(drv, r->bssid);
3065 } else if (is_sta_interface(drv->nlmode) &&
3066 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
3067 0) {
3068 wpa_printf(MSG_DEBUG, "nl80211: Local state "
3069 "(associated with " MACSTR ") does "
3070 "not match with BSS state",
3071 MAC2STR(drv->bssid));
3072 clear_state_mismatch(drv, r->bssid);
3073 clear_state_mismatch(drv, drv->bssid);
3074 }
3075 }
3076 }
3077 }
3078
3079
3080 static void wpa_scan_results_free(struct wpa_scan_results *res)
3081 {
3082 size_t i;
3083
3084 if (res == NULL)
3085 return;
3086
3087 for (i = 0; i < res->num; i++)
3088 os_free(res->res[i]);
3089 os_free(res->res);
3090 os_free(res);
3091 }
3092
3093
3094 static struct wpa_scan_results *
3095 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
3096 {
3097 struct nl_msg *msg;
3098 struct wpa_scan_results *res;
3099 int ret;
3100 struct nl80211_bss_info_arg arg;
3101
3102 res = os_zalloc(sizeof(*res));
3103 if (res == NULL)
3104 return NULL;
3105 msg = nlmsg_alloc();
3106 if (!msg)
3107 goto nla_put_failure;
3108
3109 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
3110 NL80211_CMD_GET_SCAN, 0);
3111 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3112
3113 arg.drv = drv;
3114 arg.res = res;
3115 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
3116 msg = NULL;
3117 if (ret == 0) {
3118 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
3119 (unsigned long) res->num);
3120 return res;
3121 }
3122 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
3123 "(%s)", ret, strerror(-ret));
3124 nla_put_failure:
3125 nlmsg_free(msg);
3126 wpa_scan_results_free(res);
3127 return NULL;
3128 }
3129
3130
3131 /**
3132 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
3133 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
3134 * Returns: Scan results on success, -1 on failure
3135 */
3136 static struct wpa_scan_results *
3137 wpa_driver_nl80211_get_scan_results(void *priv)
3138 {
3139 struct i802_bss *bss = priv;
3140 struct wpa_driver_nl80211_data *drv = bss->drv;
3141 struct wpa_scan_results *res;
3142
3143 res = nl80211_get_scan_results(drv);
3144 if (res)
3145 wpa_driver_nl80211_check_bss_status(drv, res);
3146 return res;
3147 }
3148
3149
3150 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
3151 {
3152 struct wpa_scan_results *res;
3153 size_t i;
3154
3155 res = nl80211_get_scan_results(drv);
3156 if (res == NULL) {
3157 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
3158 return;
3159 }
3160
3161 wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
3162 for (i = 0; i < res->num; i++) {
3163 struct wpa_scan_res *r = res->res[i];
3164 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
3165 (int) i, (int) res->num, MAC2STR(r->bssid),
3166 r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
3167 r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
3168 }
3169
3170 wpa_scan_results_free(res);
3171 }
3172
3173
3174 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
3175 enum wpa_alg alg, const u8 *addr,
3176 int key_idx, int set_tx,
3177 const u8 *seq, size_t seq_len,
3178 const u8 *key, size_t key_len)
3179 {
3180 struct i802_bss *bss = priv;
3181 struct wpa_driver_nl80211_data *drv = bss->drv;
3182 int ifindex = if_nametoindex(ifname);
3183 struct nl_msg *msg;
3184 int ret;
3185
3186 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
3187 "set_tx=%d seq_len=%lu key_len=%lu",
3188 __func__, ifindex, alg, addr, key_idx, set_tx,
3189 (unsigned long) seq_len, (unsigned long) key_len);
3190
3191 msg = nlmsg_alloc();
3192 if (!msg)
3193 return -ENOMEM;
3194
3195 if (alg == WPA_ALG_NONE) {
3196 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3197 0, NL80211_CMD_DEL_KEY, 0);
3198 } else {
3199 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3200 0, NL80211_CMD_NEW_KEY, 0);
3201 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
3202 switch (alg) {
3203 case WPA_ALG_WEP:
3204 if (key_len == 5)
3205 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3206 WLAN_CIPHER_SUITE_WEP40);
3207 else
3208 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3209 WLAN_CIPHER_SUITE_WEP104);
3210 break;
3211 case WPA_ALG_TKIP:
3212 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3213 WLAN_CIPHER_SUITE_TKIP);
3214 break;
3215 case WPA_ALG_CCMP:
3216 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3217 WLAN_CIPHER_SUITE_CCMP);
3218 break;
3219 case WPA_ALG_IGTK:
3220 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
3221 WLAN_CIPHER_SUITE_AES_CMAC);
3222 break;
3223 default:
3224 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
3225 "algorithm %d", __func__, alg);
3226 nlmsg_free(msg);
3227 return -1;
3228 }
3229 }
3230
3231 if (seq && seq_len)
3232 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
3233
3234 if (addr && !is_broadcast_ether_addr(addr)) {
3235 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
3236 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3237
3238 if (alg != WPA_ALG_WEP && key_idx && !set_tx) {
3239 wpa_printf(MSG_DEBUG, " RSN IBSS RX GTK");
3240 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE,
3241 NL80211_KEYTYPE_GROUP);
3242 }
3243 } else if (addr && is_broadcast_ether_addr(addr)) {
3244 struct nl_msg *types;
3245 int err;
3246 wpa_printf(MSG_DEBUG, " broadcast key");
3247 types = nlmsg_alloc();
3248 if (!types)
3249 goto nla_put_failure;
3250 NLA_PUT_FLAG(types, NL80211_KEY_DEFAULT_TYPE_MULTICAST);
3251 err = nla_put_nested(msg, NL80211_ATTR_KEY_DEFAULT_TYPES,
3252 types);
3253 nlmsg_free(types);
3254 if (err)
3255 goto nla_put_failure;
3256 }
3257 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
3258 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3259
3260 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3261 if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
3262 ret = 0;
3263 if (ret)
3264 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
3265 ret, strerror(-ret));
3266
3267 /*
3268 * If we failed or don't need to set the default TX key (below),
3269 * we're done here.
3270 */
3271 if (ret || !set_tx || alg == WPA_ALG_NONE)
3272 return ret;
3273 if (is_ap_interface(drv->nlmode) && addr &&
3274 !is_broadcast_ether_addr(addr))
3275 return ret;
3276
3277 msg = nlmsg_alloc();
3278 if (!msg)
3279 return -ENOMEM;
3280
3281 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3282 0, NL80211_CMD_SET_KEY, 0);
3283 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
3284 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3285 if (alg == WPA_ALG_IGTK)
3286 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
3287 else
3288 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
3289 if (addr && is_broadcast_ether_addr(addr)) {
3290 struct nl_msg *types;
3291 int err;
3292 types = nlmsg_alloc();
3293 if (!types)
3294 goto nla_put_failure;
3295 NLA_PUT_FLAG(types, NL80211_KEY_DEFAULT_TYPE_MULTICAST);
3296 err = nla_put_nested(msg, NL80211_ATTR_KEY_DEFAULT_TYPES,
3297 types);
3298 nlmsg_free(types);
3299 if (err)
3300 goto nla_put_failure;
3301 } else if (addr) {
3302 struct nl_msg *types;
3303 int err;
3304 types = nlmsg_alloc();
3305 if (!types)
3306 goto nla_put_failure;
3307 NLA_PUT_FLAG(types, NL80211_KEY_DEFAULT_TYPE_UNICAST);
3308 err = nla_put_nested(msg, NL80211_ATTR_KEY_DEFAULT_TYPES,
3309 types);
3310 nlmsg_free(types);
3311 if (err)
3312 goto nla_put_failure;
3313 }
3314
3315 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3316 if (ret == -ENOENT)
3317 ret = 0;
3318 if (ret)
3319 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
3320 "err=%d %s)", ret, strerror(-ret));
3321 return ret;
3322
3323 nla_put_failure:
3324 return -ENOBUFS;
3325 }
3326
3327
3328 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
3329 int key_idx, int defkey,
3330 const u8 *seq, size_t seq_len,
3331 const u8 *key, size_t key_len)
3332 {
3333 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
3334 if (!key_attr)
3335 return -1;
3336
3337 if (defkey && alg == WPA_ALG_IGTK)
3338 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
3339 else if (defkey)
3340 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
3341
3342 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
3343
3344 switch (alg) {
3345 case WPA_ALG_WEP:
3346 if (key_len == 5)
3347 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3348 WLAN_CIPHER_SUITE_WEP40);
3349 else
3350 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3351 WLAN_CIPHER_SUITE_WEP104);
3352 break;
3353 case WPA_ALG_TKIP:
3354 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
3355 break;
3356 case WPA_ALG_CCMP:
3357 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
3358 break;
3359 case WPA_ALG_IGTK:
3360 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3361 WLAN_CIPHER_SUITE_AES_CMAC);
3362 break;
3363 default:
3364 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
3365 "algorithm %d", __func__, alg);
3366 return -1;
3367 }
3368
3369 if (seq && seq_len)
3370 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
3371
3372 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
3373
3374 nla_nest_end(msg, key_attr);
3375
3376 return 0;
3377 nla_put_failure:
3378 return -1;
3379 }
3380
3381
3382 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
3383 struct nl_msg *msg)
3384 {
3385 int i, privacy = 0;
3386 struct nlattr *nl_keys, *nl_key;
3387
3388 for (i = 0; i < 4; i++) {
3389 if (!params->wep_key[i])
3390 continue;
3391 privacy = 1;
3392 break;
3393 }
3394 if (params->wps == WPS_MODE_PRIVACY)
3395 privacy = 1;
3396 if (params->pairwise_suite &&
3397 params->pairwise_suite != WPA_CIPHER_NONE)
3398 privacy = 1;
3399
3400 if (!privacy)
3401 return 0;
3402
3403 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
3404
3405 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
3406 if (!nl_keys)
3407 goto nla_put_failure;
3408
3409 for (i = 0; i < 4; i++) {
3410 if (!params->wep_key[i])
3411 continue;
3412
3413 nl_key = nla_nest_start(msg, i);
3414 if (!nl_key)
3415 goto nla_put_failure;
3416
3417 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
3418 params->wep_key[i]);
3419 if (params->wep_key_len[i] == 5)
3420 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3421 WLAN_CIPHER_SUITE_WEP40);
3422 else
3423 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
3424 WLAN_CIPHER_SUITE_WEP104);
3425
3426 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
3427
3428 if (i == params->wep_tx_keyidx)
3429 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
3430
3431 nla_nest_end(msg, nl_key);
3432 }
3433 nla_nest_end(msg, nl_keys);
3434
3435 return 0;
3436
3437 nla_put_failure:
3438 return -ENOBUFS;
3439 }
3440
3441
3442 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
3443 const u8 *addr, int cmd, u16 reason_code,
3444 int local_state_change)
3445 {
3446 int ret = -1;
3447 struct nl_msg *msg;
3448
3449 msg = nlmsg_alloc();
3450 if (!msg)
3451 return -1;
3452
3453 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
3454
3455 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3456 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
3457 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3458 if (local_state_change)
3459 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
3460
3461 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3462 msg = NULL;
3463 if (ret) {
3464 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3465 "(%s)", ret, strerror(-ret));
3466 goto nla_put_failure;
3467 }
3468 ret = 0;
3469
3470 nla_put_failure:
3471 nlmsg_free(msg);
3472 return ret;
3473 }
3474
3475
3476 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
3477 const u8 *addr, int reason_code)
3478 {
3479 wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
3480 __func__, MAC2STR(addr), reason_code);
3481 drv->associated = 0;
3482 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
3483 reason_code, 0);
3484 }
3485
3486
3487 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
3488 int reason_code)
3489 {
3490 struct i802_bss *bss = priv;
3491 struct wpa_driver_nl80211_data *drv = bss->drv;
3492 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3493 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
3494 wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
3495 __func__, MAC2STR(addr), reason_code);
3496 drv->associated = 0;
3497 if (drv->nlmode == NL80211_IFTYPE_ADHOC)
3498 return nl80211_leave_ibss(drv);
3499 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
3500 reason_code, 0);
3501 }
3502
3503
3504 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
3505 int reason_code)
3506 {
3507 struct i802_bss *bss = priv;
3508 struct wpa_driver_nl80211_data *drv = bss->drv;
3509 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3510 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
3511 wpa_printf(MSG_DEBUG, "%s", __func__);
3512 drv->associated = 0;
3513 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
3514 reason_code, 0);
3515 }
3516
3517
3518 static int wpa_driver_nl80211_authenticate(
3519 void *priv, struct wpa_driver_auth_params *params)
3520 {
3521 struct i802_bss *bss = priv;
3522 struct wpa_driver_nl80211_data *drv = bss->drv;
3523 int ret = -1, i;
3524 struct nl_msg *msg;
3525 enum nl80211_auth_type type;
3526 enum nl80211_iftype nlmode;
3527 int count = 0;
3528
3529 drv->associated = 0;
3530 os_memset(drv->auth_bssid, 0, ETH_ALEN);
3531 /* FIX: IBSS mode */
3532 nlmode = params->p2p ?
3533 NL80211_IFTYPE_P2P_CLIENT : NL80211_IFTYPE_STATION;
3534 if (drv->nlmode != nlmode &&
3535 wpa_driver_nl80211_set_mode(priv, nlmode) < 0)
3536 return -1;
3537
3538 retry:
3539 msg = nlmsg_alloc();
3540 if (!msg)
3541 return -1;
3542
3543 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
3544 drv->ifindex);
3545
3546 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3547 NL80211_CMD_AUTHENTICATE, 0);
3548
3549 for (i = 0; i < 4; i++) {
3550 if (!params->wep_key[i])
3551 continue;
3552 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
3553 NULL, i,
3554 i == params->wep_tx_keyidx, NULL, 0,
3555 params->wep_key[i],
3556 params->wep_key_len[i]);
3557 if (params->wep_tx_keyidx != i)
3558 continue;
3559 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
3560 params->wep_key[i], params->wep_key_len[i])) {
3561 nlmsg_free(msg);
3562 return -1;
3563 }
3564 }
3565
3566 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3567 if (params->bssid) {
3568 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3569 MAC2STR(params->bssid));
3570 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3571 }
3572 if (params->freq) {
3573 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3574 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3575 }
3576 if (params->ssid) {
3577 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3578 params->ssid, params->ssid_len);
3579 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3580 params->ssid);
3581 }
3582 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
3583 if (params->ie)
3584 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
3585 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3586 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3587 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3588 type = NL80211_AUTHTYPE_SHARED_KEY;
3589 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3590 type = NL80211_AUTHTYPE_NETWORK_EAP;
3591 else if (params->auth_alg & WPA_AUTH_ALG_FT)
3592 type = NL80211_AUTHTYPE_FT;
3593 else
3594 goto nla_put_failure;
3595 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3596 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3597 if (params->local_state_change) {
3598 wpa_printf(MSG_DEBUG, " * Local state change only");
3599 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
3600 }
3601
3602 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3603 msg = NULL;
3604 if (ret) {
3605 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3606 "(%s)", ret, strerror(-ret));
3607 count++;
3608 if (ret == -EALREADY && count == 1 && params->bssid &&
3609 !params->local_state_change) {
3610 /*
3611 * mac80211 does not currently accept new
3612 * authentication if we are already authenticated. As a
3613 * workaround, force deauthentication and try again.
3614 */
3615 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
3616 "after forced deauthentication");
3617 wpa_driver_nl80211_deauthenticate(
3618 bss, params->bssid,
3619 WLAN_REASON_PREV_AUTH_NOT_VALID);
3620 nlmsg_free(msg);
3621 goto retry;
3622 }
3623 goto nla_put_failure;
3624 }
3625 ret = 0;
3626 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
3627 "successfully");
3628
3629 nla_put_failure:
3630 nlmsg_free(msg);
3631 return ret;
3632 }
3633
3634
3635 struct phy_info_arg {
3636 u16 *num_modes;
3637 struct hostapd_hw_modes *modes;
3638 };
3639
3640 static int phy_info_handler(struct nl_msg *msg, void *arg)
3641 {
3642 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
3643 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3644 struct phy_info_arg *phy_info = arg;
3645
3646 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
3647
3648 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
3649 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
3650 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
3651 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
3652 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
3653 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
3654 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
3655 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
3656 };
3657
3658 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
3659 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
3660 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
3661 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
3662 };
3663
3664 struct nlattr *nl_band;
3665 struct nlattr *nl_freq;
3666 struct nlattr *nl_rate;
3667 int rem_band, rem_freq, rem_rate;
3668 struct hostapd_hw_modes *mode;
3669 int idx, mode_is_set;
3670
3671 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3672 genlmsg_attrlen(gnlh, 0), NULL);
3673
3674 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
3675 return NL_SKIP;
3676
3677 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
3678 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
3679 if (!mode)
3680 return NL_SKIP;
3681 phy_info->modes = mode;
3682
3683 mode_is_set = 0;
3684
3685 mode = &phy_info->modes[*(phy_info->num_modes)];
3686 memset(mode, 0, sizeof(*mode));
3687 *(phy_info->num_modes) += 1;
3688
3689 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
3690 nla_len(nl_band), NULL);
3691
3692 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
3693 mode->ht_capab = nla_get_u16(
3694 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
3695 }
3696
3697 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
3698 mode->a_mpdu_params |= nla_get_u8(
3699 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
3700 0x03;
3701 }
3702
3703 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
3704 mode->a_mpdu_params |= nla_get_u8(
3705 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
3706 2;
3707 }
3708
3709 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
3710 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
3711 u8 *mcs;
3712 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
3713 os_memcpy(mode->mcs_set, mcs, 16);
3714 }
3715
3716 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3717 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3718 nla_len(nl_freq), freq_policy);
3719 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3720 continue;
3721 mode->num_channels++;
3722 }
3723
3724 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
3725 if (!mode->channels)
3726 return NL_SKIP;
3727
3728 idx = 0;
3729
3730 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3731 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3732 nla_len(nl_freq), freq_policy);
3733 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3734 continue;
3735
3736 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
3737 mode->channels[idx].flag = 0;
3738
3739 if (!mode_is_set) {
3740 /* crude heuristic */
3741 if (mode->channels[idx].freq < 4000)
3742 mode->mode = HOSTAPD_MODE_IEEE80211B;
3743 else
3744 mode->mode = HOSTAPD_MODE_IEEE80211A;
3745 mode_is_set = 1;
3746 }
3747
3748 /* crude heuristic */
3749 if (mode->channels[idx].freq < 4000)
3750 if (mode->channels[idx].freq == 2484)
3751 mode->channels[idx].chan = 14;
3752 else
3753 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
3754 else
3755 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
3756
3757 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3758 mode->channels[idx].flag |=
3759 HOSTAPD_CHAN_DISABLED;
3760 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
3761 mode->channels[idx].flag |=
3762 HOSTAPD_CHAN_PASSIVE_SCAN;
3763 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
3764 mode->channels[idx].flag |=
3765 HOSTAPD_CHAN_NO_IBSS;
3766 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
3767 mode->channels[idx].flag |=
3768 HOSTAPD_CHAN_RADAR;
3769
3770 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
3771 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3772 mode->channels[idx].max_tx_power =
3773 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
3774
3775 idx++;
3776 }
3777
3778 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3779 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3780 nla_len(nl_rate), rate_policy);
3781 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
3782 continue;
3783 mode->num_rates++;
3784 }
3785
3786 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
3787 if (!mode->rates)
3788 return NL_SKIP;
3789
3790 idx = 0;
3791
3792 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3793 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3794 nla_len(nl_rate), rate_policy);
3795 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
3796 continue;
3797 mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
3798
3799 /* crude heuristic */
3800 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
3801 mode->rates[idx] > 200)
3802 mode->mode = HOSTAPD_MODE_IEEE80211G;
3803
3804 idx++;
3805 }
3806 }
3807
3808 return NL_SKIP;
3809 }
3810
3811 static struct hostapd_hw_modes *
3812 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
3813 {
3814 u16 m;
3815 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
3816 int i, mode11g_idx = -1;
3817
3818 /* If only 802.11g mode is included, use it to construct matching
3819 * 802.11b mode data. */
3820
3821 for (m = 0; m < *num_modes; m++) {
3822 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
3823 return modes; /* 802.11b already included */
3824 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
3825 mode11g_idx = m;
3826 }
3827
3828 if (mode11g_idx < 0)
3829 return modes; /* 2.4 GHz band not supported at all */
3830
3831 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
3832 if (nmodes == NULL)
3833 return modes; /* Could not add 802.11b mode */
3834
3835 mode = &nmodes[*num_modes];
3836 os_memset(mode, 0, sizeof(*mode));
3837 (*num_modes)++;
3838 modes = nmodes;
3839
3840 mode->mode = HOSTAPD_MODE_IEEE80211B;
3841
3842 mode11g = &modes[mode11g_idx];
3843 mode->num_channels = mode11g->num_channels;
3844 mode->channels = os_malloc(mode11g->num_channels *
3845 sizeof(struct hostapd_channel_data));
3846 if (mode->channels == NULL) {
3847 (*num_modes)--;
3848 return modes; /* Could not add 802.11b mode */
3849 }
3850 os_memcpy(mode->channels, mode11g->channels,
3851 mode11g->num_channels * sizeof(struct hostapd_channel_data));
3852
3853 mode->num_rates = 0;
3854 mode->rates = os_malloc(4 * sizeof(int));
3855 if (mode->rates == NULL) {
3856 os_free(mode->channels);
3857 (*num_modes)--;
3858 return modes; /* Could not add 802.11b mode */
3859 }
3860
3861 for (i = 0; i < mode11g->num_rates; i++) {
3862 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
3863 mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
3864 continue;
3865 mode->rates[mode->num_rates] = mode11g->rates[i];
3866 mode->num_rates++;
3867 if (mode->num_rates == 4)
3868 break;
3869 }
3870
3871 if (mode->num_rates == 0) {
3872 os_free(mode->channels);
3873 os_free(mode->rates);
3874 (*num_modes)--;
3875 return modes; /* No 802.11b rates */
3876 }
3877
3878 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
3879 "information");
3880
3881 return modes;
3882 }
3883
3884
3885 static void nl80211_set_ht40_mode(struct hostapd_hw_modes *mode, int start,
3886 int end)
3887 {
3888 int c;
3889
3890 for (c = 0; c < mode->num_channels; c++) {
3891 struct hostapd_channel_data *chan = &mode->channels[c];
3892 if (chan->freq - 10 >= start && chan->freq + 10 <= end)
3893 chan->flag |= HOSTAPD_CHAN_HT40;
3894 }
3895 }
3896
3897
3898 static void nl80211_set_ht40_mode_sec(struct hostapd_hw_modes *mode, int start,
3899 int end)
3900 {
3901 int c;
3902
3903 for (c = 0; c < mode->num_channels; c++) {
3904 struct hostapd_channel_data *chan = &mode->channels[c];
3905 if (!(chan->flag & HOSTAPD_CHAN_HT40))
3906 continue;
3907 if (chan->freq - 30 >= start && chan->freq - 10 <= end)
3908 chan->flag |= HOSTAPD_CHAN_HT40MINUS;
3909 if (chan->freq + 10 >= start && chan->freq + 30 <= end)
3910 chan->flag |= HOSTAPD_CHAN_HT40PLUS;
3911 }
3912 }
3913
3914
3915 static void nl80211_reg_rule_ht40(struct nlattr *tb[],
3916 struct phy_info_arg *results)
3917 {
3918 u32 start, end, max_bw;
3919 u16 m;
3920
3921 if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
3922 tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
3923 tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
3924 return;
3925
3926 start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
3927 end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
3928 max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
3929
3930 wpa_printf(MSG_DEBUG, "nl80211: %u-%u @ %u MHz",
3931 start, end, max_bw);
3932 if (max_bw < 40)
3933 return;
3934
3935 for (m = 0; m < *results->num_modes; m++) {
3936 if (!(results->modes[m].ht_capab &
3937 HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
3938 continue;
3939 nl80211_set_ht40_mode(&results->modes[m], start, end);
3940 }
3941 }
3942
3943
3944 static void nl80211_reg_rule_sec(struct nlattr *tb[],
3945 struct phy_info_arg *results)
3946 {
3947 u32 start, end, max_bw;
3948 u16 m;
3949
3950 if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
3951 tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
3952 tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
3953 return;
3954
3955 start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
3956 end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
3957 max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
3958
3959 if (max_bw < 20)
3960 return;
3961
3962 for (m = 0; m < *results->num_modes; m++) {
3963 if (!(results->modes[m].ht_capab &
3964 HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
3965 continue;
3966 nl80211_set_ht40_mode_sec(&results->modes[m], start, end);
3967 }
3968 }
3969
3970
3971 static int nl80211_get_reg(struct nl_msg *msg, void *arg)
3972 {
3973 struct phy_info_arg *results = arg;
3974 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
3975 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3976 struct nlattr *nl_rule;
3977 struct nlattr *tb_rule[NL80211_FREQUENCY_ATTR_MAX + 1];
3978 int rem_rule;
3979 static struct nla_policy reg_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
3980 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
3981 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
3982 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
3983 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
3984 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
3985 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
3986 };
3987
3988 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3989 genlmsg_attrlen(gnlh, 0), NULL);
3990 if (!tb_msg[NL80211_ATTR_REG_ALPHA2] ||
3991 !tb_msg[NL80211_ATTR_REG_RULES]) {
3992 wpa_printf(MSG_DEBUG, "nl80211: No regulatory information "
3993 "available");
3994 return NL_SKIP;
3995 }
3996
3997 wpa_printf(MSG_DEBUG, "nl80211: Regulatory information - country=%s",
3998 (char *) nla_data(tb_msg[NL80211_ATTR_REG_ALPHA2]));
3999
4000 nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
4001 {
4002 nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
4003 nla_data(nl_rule), nla_len(nl_rule), reg_policy);
4004 nl80211_reg_rule_ht40(tb_rule, results);
4005 }
4006
4007 nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
4008 {
4009 nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
4010 nla_data(nl_rule), nla_len(nl_rule), reg_policy);
4011 nl80211_reg_rule_sec(tb_rule, results);
4012 }
4013
4014 return NL_SKIP;
4015 }
4016
4017
4018 static int nl80211_set_ht40_flags(struct wpa_driver_nl80211_data *drv,
4019 struct phy_info_arg *results)
4020 {
4021 struct nl_msg *msg;
4022
4023 msg = nlmsg_alloc();
4024 if (!msg)
4025 return -ENOMEM;
4026
4027 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4028 0, NL80211_CMD_GET_REG, 0);
4029 return send_and_recv_msgs(drv, msg, nl80211_get_reg, results);
4030 }
4031
4032
4033 static struct hostapd_hw_modes *
4034 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
4035 {
4036 struct i802_bss *bss = priv;
4037 struct wpa_driver_nl80211_data *drv = bss->drv;
4038 struct nl_msg *msg;
4039 struct phy_info_arg result = {
4040 .num_modes = num_modes,
4041 .modes = NULL,
4042 };
4043
4044 *num_modes = 0;
4045 *flags = 0;
4046
4047 msg = nlmsg_alloc();
4048 if (!msg)
4049 return NULL;
4050
4051 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4052 0, NL80211_CMD_GET_WIPHY, 0);
4053
4054 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4055
4056 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0) {
4057 nl80211_set_ht40_flags(drv, &result);
4058 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
4059 }
4060 nla_put_failure:
4061 return NULL;
4062 }
4063
4064
4065 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
4066 const void *data, size_t len,
4067 int encrypt)
4068 {
4069 __u8 rtap_hdr[] = {
4070 0x00, 0x00, /* radiotap version */
4071 0x0e, 0x00, /* radiotap length */
4072 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
4073 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
4074 0x00, /* padding */
4075 0x00, 0x00, /* RX and TX flags to indicate that */
4076 0x00, 0x00, /* this is the injected frame directly */
4077 };
4078 struct iovec iov[2] = {
4079 {
4080 .iov_base = &rtap_hdr,
4081 .iov_len = sizeof(rtap_hdr),
4082 },
4083 {
4084 .iov_base = (void *) data,
4085 .iov_len = len,
4086 }
4087 };
4088 struct msghdr msg = {
4089 .msg_name = NULL,
4090 .msg_namelen = 0,
4091 .msg_iov = iov,
4092 .msg_iovlen = 2,
4093 .msg_control = NULL,
4094 .msg_controllen = 0,
4095 .msg_flags = 0,
4096 };
4097 int res;
4098
4099 if (encrypt)
4100 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
4101
4102 if (drv->monitor_sock < 0) {
4103 wpa_printf(MSG_DEBUG, "nl80211: No monitor socket available "
4104 "for %s", __func__);
4105 return -1;
4106 }
4107
4108 res = sendmsg(drv->monitor_sock, &msg, 0);
4109 if (res < 0) {
4110 wpa_printf(MSG_INFO, "nl80211: sendmsg: %s", strerror(errno));
4111 return -1;
4112 }
4113 return 0;
4114 }
4115
4116
4117 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
4118 size_t data_len)
4119 {
4120 struct i802_bss *bss = priv;
4121 struct wpa_driver_nl80211_data *drv = bss->drv;
4122 struct ieee80211_mgmt *mgmt;
4123 int encrypt = 1;
4124 u16 fc;
4125
4126 mgmt = (struct ieee80211_mgmt *) data;
4127 fc = le_to_host16(mgmt->frame_control);
4128
4129 if (is_sta_interface(drv->nlmode) &&
4130 WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
4131 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
4132 /*
4133 * The use of last_mgmt_freq is a bit of a hack,
4134 * but it works due to the single-threaded nature
4135 * of wpa_supplicant.
4136 */
4137 return nl80211_send_frame_cmd(drv, drv->last_mgmt_freq, 0,
4138 data, data_len, NULL);
4139 }
4140
4141 if (drv->no_monitor_iface_capab && is_ap_interface(drv->nlmode)) {
4142 return nl80211_send_frame_cmd(drv, drv->ap_oper_freq, 0,
4143 data, data_len, NULL);
4144 }
4145
4146 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
4147 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
4148 /*
4149 * Only one of the authentication frame types is encrypted.
4150 * In order for static WEP encryption to work properly (i.e.,
4151 * to not encrypt the frame), we need to tell mac80211 about
4152 * the frames that must not be encrypted.
4153 */
4154 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
4155 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
4156 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
4157 encrypt = 0;
4158 }
4159
4160 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
4161 }
4162
4163
4164 static int wpa_driver_nl80211_set_ap(void *priv,
4165 struct wpa_driver_ap_params *params)
4166 {
4167 struct i802_bss *bss = priv;
4168 struct wpa_driver_nl80211_data *drv = bss->drv;
4169 struct nl_msg *msg;
4170 u8 cmd = NL80211_CMD_NEW_BEACON;
4171 int ret;
4172 int beacon_set;
4173 int ifindex = if_nametoindex(bss->ifname);
4174 int num_suites;
4175 u32 suites[10];
4176 u32 ver;
4177
4178 beacon_set = bss->beacon_set;
4179
4180 msg = nlmsg_alloc();
4181 if (!msg)
4182 return -ENOMEM;
4183
4184 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
4185 beacon_set);
4186 if (beacon_set)
4187 cmd = NL80211_CMD_SET_BEACON;
4188
4189 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4190 0, cmd, 0);
4191 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, params->head_len, params->head);
4192 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, params->tail_len, params->tail);
4193 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4194 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, params->beacon_int);
4195 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, params->dtim_period);
4196 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4197 params->ssid);
4198 switch (params->hide_ssid) {
4199 case NO_SSID_HIDING:
4200 NLA_PUT_U32(msg, NL80211_ATTR_HIDDEN_SSID,
4201 NL80211_HIDDEN_SSID_NOT_IN_USE);
4202 break;
4203 case HIDDEN_SSID_ZERO_LEN:
4204 NLA_PUT_U32(msg, NL80211_ATTR_HIDDEN_SSID,
4205 NL80211_HIDDEN_SSID_ZERO_LEN);
4206 break;
4207 case HIDDEN_SSID_ZERO_CONTENTS:
4208 NLA_PUT_U32(msg, NL80211_ATTR_HIDDEN_SSID,
4209 NL80211_HIDDEN_SSID_ZERO_CONTENTS);
4210 break;
4211 }
4212 if (params->privacy)
4213 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
4214 if ((params->auth_algs & (WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED)) ==
4215 (WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED)) {
4216 /* Leave out the attribute */
4217 } else if (params->auth_algs & WPA_AUTH_ALG_SHARED)
4218 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE,
4219 NL80211_AUTHTYPE_SHARED_KEY);
4220 else
4221 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE,
4222 NL80211_AUTHTYPE_OPEN_SYSTEM);
4223
4224 ver = 0;
4225 if (params->wpa_version & WPA_PROTO_WPA)
4226 ver |= NL80211_WPA_VERSION_1;
4227 if (params->wpa_version & WPA_PROTO_RSN)
4228 ver |= NL80211_WPA_VERSION_2;
4229 if (ver)
4230 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
4231
4232 num_suites = 0;
4233 if (params->key_mgmt_suites & WPA_KEY_MGMT_IEEE8021X)
4234 suites[num_suites++] = WLAN_AKM_SUITE_8021X;
4235 if (params->key_mgmt_suites & WPA_KEY_MGMT_PSK)
4236 suites[num_suites++] = WLAN_AKM_SUITE_PSK;
4237 if (num_suites) {
4238 NLA_PUT(msg, NL80211_ATTR_AKM_SUITES,
4239 num_suites * sizeof(u32), suites);
4240 }
4241
4242 num_suites = 0;
4243 if (params->pairwise_ciphers & WPA_CIPHER_CCMP)
4244 suites[num_suites++] = WLAN_CIPHER_SUITE_CCMP;
4245 if (params->pairwise_ciphers & WPA_CIPHER_TKIP)
4246 suites[num_suites++] = WLAN_CIPHER_SUITE_TKIP;
4247 if (params->pairwise_ciphers & WPA_CIPHER_WEP104)
4248 suites[num_suites++] = WLAN_CIPHER_SUITE_WEP104;
4249 if (params->pairwise_ciphers & WPA_CIPHER_WEP40)
4250 suites[num_suites++] = WLAN_CIPHER_SUITE_WEP40;
4251 if (num_suites) {
4252 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
4253 num_suites * sizeof(u32), suites);
4254 }
4255
4256 switch (params->group_cipher) {
4257 case WPA_CIPHER_CCMP:
4258 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4259 WLAN_CIPHER_SUITE_CCMP);
4260 break;
4261 case WPA_CIPHER_TKIP:
4262 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4263 WLAN_CIPHER_SUITE_TKIP);
4264 break;
4265 case WPA_CIPHER_WEP104:
4266 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4267 WLAN_CIPHER_SUITE_WEP104);
4268 break;
4269 case WPA_CIPHER_WEP40:
4270 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4271 WLAN_CIPHER_SUITE_WEP40);
4272 break;
4273 }
4274
4275 if (params->beacon_ies) {
4276 NLA_PUT(msg, NL80211_ATTR_IE, wpabuf_len(params->beacon_ies),
4277 wpabuf_head(params->beacon_ies));
4278 }
4279 if (params->proberesp_ies) {
4280 NLA_PUT(msg, NL80211_ATTR_IE_PROBE_RESP,
4281 wpabuf_len(params->proberesp_ies),
4282 wpabuf_head(params->proberesp_ies));
4283 }
4284 if (params->assocresp_ies) {
4285 NLA_PUT(msg, NL80211_ATTR_IE_ASSOC_RESP,
4286 wpabuf_len(params->assocresp_ies),
4287 wpabuf_head(params->assocresp_ies));
4288 }
4289
4290 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4291 if (ret) {
4292 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
4293 ret, strerror(-ret));
4294 } else {
4295 bss->beacon_set = 1;
4296 }
4297 return ret;
4298 nla_put_failure:
4299 return -ENOBUFS;
4300 }
4301
4302
4303 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
4304 int freq, int ht_enabled,
4305 int sec_channel_offset)
4306 {
4307 struct nl_msg *msg;
4308 int ret;
4309
4310 wpa_printf(MSG_DEBUG, "nl80211: Set freq %d (ht_enabled=%d "
4311 "sec_channel_offset=%d)",
4312 freq, ht_enabled, sec_channel_offset);
4313 msg = nlmsg_alloc();
4314 if (!msg)
4315 return -1;
4316
4317 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4318 NL80211_CMD_SET_WIPHY, 0);
4319
4320 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4321 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4322 if (ht_enabled) {
4323 switch (sec_channel_offset) {
4324 case -1:
4325 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
4326 NL80211_CHAN_HT40MINUS);
4327 break;
4328 case 1:
4329 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
4330 NL80211_CHAN_HT40PLUS);
4331 break;
4332 default:
4333 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
4334 NL80211_CHAN_HT20);
4335 break;
4336 }
4337 }
4338
4339 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4340 if (ret == 0)
4341 return 0;
4342 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
4343 "%d (%s)", freq, ret, strerror(-ret));
4344 nla_put_failure:
4345 return -1;
4346 }
4347
4348
4349 static u32 sta_flags_nl80211(int flags)
4350 {
4351 u32 f = 0;
4352
4353 if (flags & WPA_STA_AUTHORIZED)
4354 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
4355 if (flags & WPA_STA_WMM)
4356 f |= BIT(NL80211_STA_FLAG_WME);
4357 if (flags & WPA_STA_SHORT_PREAMBLE)
4358 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
4359 if (flags & WPA_STA_MFP)
4360 f |= BIT(NL80211_STA_FLAG_MFP);
4361
4362 return f;
4363 }
4364
4365
4366 static int wpa_driver_nl80211_sta_add(void *priv,
4367 struct hostapd_sta_add_params *params)
4368 {
4369 struct i802_bss *bss = priv;
4370 struct wpa_driver_nl80211_data *drv = bss->drv;
4371 struct nl_msg *msg;
4372 struct nl80211_sta_flag_update upd;
4373 int ret = -ENOBUFS;
4374
4375 msg = nlmsg_alloc();
4376 if (!msg)
4377 return -ENOMEM;
4378
4379 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4380 0, NL80211_CMD_NEW_STATION, 0);
4381
4382 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4383 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
4384 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
4385 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
4386 params->supp_rates);
4387 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
4388 params->listen_interval);
4389 if (params->ht_capabilities) {
4390 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
4391 sizeof(*params->ht_capabilities),
4392 params->ht_capabilities);
4393 }
4394
4395 os_memset(&upd, 0, sizeof(upd));
4396 upd.mask = sta_flags_nl80211(params->flags);
4397 upd.set = upd.mask;
4398 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4399
4400 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4401 if (ret)
4402 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
4403 "result: %d (%s)", ret, strerror(-ret));
4404 if (ret == -EEXIST)
4405 ret = 0;
4406 nla_put_failure:
4407 return ret;
4408 }
4409
4410
4411 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
4412 {
4413 struct i802_bss *bss = priv;
4414 struct wpa_driver_nl80211_data *drv = bss->drv;
4415 struct nl_msg *msg;
4416 int ret;
4417
4418 msg = nlmsg_alloc();
4419 if (!msg)
4420 return -ENOMEM;
4421
4422 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4423 0, NL80211_CMD_DEL_STATION, 0);
4424
4425 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4426 if_nametoindex(bss->ifname));
4427 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4428
4429 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4430 if (ret == -ENOENT)
4431 return 0;
4432 return ret;
4433 nla_put_failure:
4434 return -ENOBUFS;
4435 }
4436
4437
4438 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
4439 int ifidx)
4440 {
4441 struct nl_msg *msg;
4442
4443 wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
4444
4445 #ifdef HOSTAPD
4446 /* stop listening for EAPOL on this interface */
4447 del_ifidx(drv, ifidx);
4448 #endif /* HOSTAPD */
4449
4450 msg = nlmsg_alloc();
4451 if (!msg)
4452 goto nla_put_failure;
4453
4454 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4455 0, NL80211_CMD_DEL_INTERFACE, 0);
4456 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
4457
4458 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4459 return;
4460 nla_put_failure:
4461 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
4462 }
4463
4464
4465 static const char * nl80211_iftype_str(enum nl80211_iftype mode)
4466 {
4467 switch (mode) {
4468 case NL80211_IFTYPE_ADHOC:
4469 return "ADHOC";
4470 case NL80211_IFTYPE_STATION:
4471 return "STATION";
4472 case NL80211_IFTYPE_AP:
4473 return "AP";
4474 case NL80211_IFTYPE_MONITOR:
4475 return "MONITOR";
4476 case NL80211_IFTYPE_P2P_CLIENT:
4477 return "P2P_CLIENT";
4478 case NL80211_IFTYPE_P2P_GO:
4479 return "P2P_GO";
4480 default:
4481 return "unknown";
4482 }
4483 }
4484
4485
4486 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
4487 const char *ifname,
4488 enum nl80211_iftype iftype,
4489 const u8 *addr, int wds)
4490 {
4491 struct nl_msg *msg, *flags = NULL;
4492 int ifidx;
4493 int ret = -ENOBUFS;
4494
4495 wpa_printf(MSG_DEBUG, "nl80211: Create interface iftype %d (%s)",
4496 iftype, nl80211_iftype_str(iftype));
4497
4498 msg = nlmsg_alloc();
4499 if (!msg)
4500 return -1;
4501
4502 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4503 0, NL80211_CMD_NEW_INTERFACE, 0);
4504 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4505 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
4506 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
4507
4508 if (iftype == NL80211_IFTYPE_MONITOR) {
4509 int err;
4510
4511 flags = nlmsg_alloc();
4512 if (!flags)
4513 goto nla_put_failure;
4514
4515 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
4516
4517 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
4518
4519 nlmsg_free(flags);
4520
4521 if (err)
4522 goto nla_put_failure;
4523 } else if (wds) {
4524 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
4525 }
4526
4527 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4528 if (ret) {
4529 nla_put_failure:
4530 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
4531 ifname, ret, strerror(-ret));
4532 return ret;
4533 }
4534
4535 ifidx = if_nametoindex(ifname);
4536 wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
4537 ifname, ifidx);
4538
4539 if (ifidx <= 0)
4540 return -1;
4541
4542 #ifdef HOSTAPD
4543 /* start listening for EAPOL on this interface */
4544 add_ifidx(drv, ifidx);
4545 #endif /* HOSTAPD */
4546
4547 if (addr && iftype != NL80211_IFTYPE_MONITOR &&
4548 linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
4549 nl80211_remove_iface(drv, ifidx);
4550 return -1;
4551 }
4552
4553 return ifidx;
4554 }
4555
4556
4557 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
4558 const char *ifname, enum nl80211_iftype iftype,
4559 const u8 *addr, int wds)
4560 {
4561 int ret;
4562
4563 ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
4564
4565 /* if error occurred and interface exists already */
4566 if (ret == -ENFILE && if_nametoindex(ifname)) {
4567 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
4568
4569 /* Try to remove the interface that was already there. */
4570 nl80211_remove_iface(drv, if_nametoindex(ifname));
4571
4572 /* Try to create the interface again */
4573 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
4574 wds);
4575 }
4576
4577 if (ret >= 0 && drv->disable_11b_rates)
4578 nl80211_disable_11b_rates(drv, ret, 1);
4579
4580 return ret;
4581 }
4582
4583
4584 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
4585 {
4586 struct ieee80211_hdr *hdr;
4587 u16 fc;
4588 union wpa_event_data event;
4589
4590 hdr = (struct ieee80211_hdr *) buf;
4591 fc = le_to_host16(hdr->frame_control);
4592
4593 os_memset(&event, 0, sizeof(event));
4594 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
4595 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
4596 event.tx_status.dst = hdr->addr1;
4597 event.tx_status.data = buf;
4598 event.tx_status.data_len = len;
4599 event.tx_status.ack = ok;
4600 wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
4601 }
4602
4603
4604 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
4605 u8 *buf, size_t len)
4606 {
4607 union wpa_event_data event;
4608 os_memset(&event, 0, sizeof(event));
4609 event.rx_from_unknown.frame = buf;
4610 event.rx_from_unknown.len = len;
4611 wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
4612 }
4613
4614
4615 static void handle_frame(struct wpa_driver_nl80211_data *drv,
4616 u8 *buf, size_t len, int datarate, int ssi_signal)
4617 {
4618 struct ieee80211_hdr *hdr;
4619 u16 fc;
4620 union wpa_event_data event;
4621
4622 hdr = (struct ieee80211_hdr *) buf;
4623 fc = le_to_host16(hdr->frame_control);
4624
4625 switch (WLAN_FC_GET_TYPE(fc)) {
4626 case WLAN_FC_TYPE_MGMT:
4627 os_memset(&event, 0, sizeof(event));
4628 event.rx_mgmt.frame = buf;
4629 event.rx_mgmt.frame_len = len;
4630 event.rx_mgmt.datarate = datarate;
4631 event.rx_mgmt.ssi_signal = ssi_signal;
4632 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
4633 break;
4634 case WLAN_FC_TYPE_CTRL:
4635 /* can only get here with PS-Poll frames */
4636 wpa_printf(MSG_DEBUG, "CTRL");
4637 from_unknown_sta(drv, buf, len);
4638 break;
4639 case WLAN_FC_TYPE_DATA:
4640 from_unknown_sta(drv, buf, len);
4641 break;
4642 }
4643 }
4644
4645
4646 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
4647 {
4648 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4649 int len;
4650 unsigned char buf[3000];
4651 struct ieee80211_radiotap_iterator iter;
4652 int ret;
4653 int datarate = 0, ssi_signal = 0;
4654 int injected = 0, failed = 0, rxflags = 0;
4655
4656 len = recv(sock, buf, sizeof(buf), 0);
4657 if (len < 0) {
4658 perror("recv");
4659 return;
4660 }
4661
4662 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
4663 printf("received invalid radiotap frame\n");
4664 return;
4665 }
4666
4667 while (1) {
4668 ret = ieee80211_radiotap_iterator_next(&iter);
4669 if (ret == -ENOENT)
4670 break;
4671 if (ret) {
4672 printf("received invalid radiotap frame (%d)\n", ret);
4673 return;
4674 }
4675 switch (iter.this_arg_index) {
4676 case IEEE80211_RADIOTAP_FLAGS:
4677 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
4678 len -= 4;
4679 break;
4680 case IEEE80211_RADIOTAP_RX_FLAGS:
4681 rxflags = 1;
4682 break;
4683 case IEEE80211_RADIOTAP_TX_FLAGS:
4684 injected = 1;
4685 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
4686 IEEE80211_RADIOTAP_F_TX_FAIL;
4687 break;
4688 case IEEE80211_RADIOTAP_DATA_RETRIES:
4689 break;
4690 case IEEE80211_RADIOTAP_CHANNEL:
4691 /* TODO: convert from freq/flags to channel number */
4692 break;
4693 case IEEE80211_RADIOTAP_RATE:
4694 datarate = *iter.this_arg * 5;
4695 break;
4696 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
4697 ssi_signal = *iter.this_arg;
4698 break;
4699 }
4700 }
4701
4702 if (rxflags && injected)
4703 return;
4704
4705 if (!injected)
4706 handle_frame(drv, buf + iter.max_length,
4707 len - iter.max_length, datarate, ssi_signal);
4708 else
4709 handle_tx_callback(drv->ctx, buf + iter.max_length,
4710 len - iter.max_length, !failed);
4711 }
4712
4713
4714 /*
4715 * we post-process the filter code later and rewrite
4716 * this to the offset to the last instruction
4717 */
4718 #define PASS 0xFF
4719 #define FAIL 0xFE
4720
4721 static struct sock_filter msock_filter_insns[] = {
4722 /*
4723 * do a little-endian load of the radiotap length field
4724 */
4725 /* load lower byte into A */
4726 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
4727 /* put it into X (== index register) */
4728 BPF_STMT(BPF_MISC| BPF_TAX, 0),
4729 /* load upper byte into A */
4730 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
4731 /* left-shift it by 8 */
4732 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
4733 /* or with X */
4734 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
4735 /* put result into X */
4736 BPF_STMT(BPF_MISC| BPF_TAX, 0),
4737
4738 /*
4739 * Allow management frames through, this also gives us those
4740 * management frames that we sent ourselves with status
4741 */
4742 /* load the lower byte of the IEEE 802.11 frame control field */
4743 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4744 /* mask off frame type and version */
4745 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
4746 /* accept frame if it's both 0, fall through otherwise */
4747 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
4748
4749 /*
4750 * TODO: add a bit to radiotap RX flags that indicates
4751 * that the sending station is not associated, then
4752 * add a filter here that filters on our DA and that flag
4753 * to allow us to deauth frames to that bad station.
4754 *
4755 * For now allow all To DS data frames through.
4756 */
4757 /* load the IEEE 802.11 frame control field */
4758 BPF_STMT(BPF_LD | BPF_H | BPF_IND, 0),
4759 /* mask off frame type, version and DS status */
4760 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0F03),
4761 /* accept frame if version 0, type 2 and To DS, fall through otherwise
4762 */
4763 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0801, PASS, 0),
4764
4765 #if 0
4766 /*
4767 * drop non-data frames
4768 */
4769 /* load the lower byte of the frame control field */
4770 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4771 /* mask off QoS bit */
4772 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
4773 /* drop non-data frames */
4774 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
4775 #endif
4776 /* load the upper byte of the frame control field */
4777 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
4778 /* mask off toDS/fromDS */
4779 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
4780 /* accept WDS frames */
4781 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, PASS, 0),
4782
4783 /*
4784 * add header length to index
4785 */
4786 /* load the lower byte of the frame control field */
4787 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
4788 /* mask off QoS bit */
4789 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
4790 /* right shift it by 6 to give 0 or 2 */
4791 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
4792 /* add data frame header length */
4793 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
4794 /* add index, was start of 802.11 header */
4795 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
4796 /* move to index, now start of LL header */
4797 BPF_STMT(BPF_MISC | BPF_TAX, 0),
4798
4799 /*
4800 * Accept empty data frames, we use those for
4801 * polling activity.
4802 */
4803 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
4804 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
4805
4806 /*
4807 * Accept EAPOL frames
4808 */
4809 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
4810 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
4811 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
4812 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
4813
4814 /* keep these last two statements or change the code below */
4815 /* return 0 == "DROP" */
4816 BPF_STMT(BPF_RET | BPF_K, 0),
4817 /* return ~0 == "keep all" */
4818 BPF_STMT(BPF_RET | BPF_K, ~0),
4819 };
4820
4821 static struct sock_fprog msock_filter = {
4822 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
4823 .filter = msock_filter_insns,
4824 };
4825
4826
4827 static int add_monitor_filter(int s)
4828 {
4829 int idx;
4830
4831 /* rewrite all PASS/FAIL jump offsets */
4832 for (idx = 0; idx < msock_filter.len; idx++) {
4833 struct sock_filter *insn = &msock_filter_insns[idx];
4834
4835 if (BPF_CLASS(insn->code) == BPF_JMP) {
4836 if (insn->code == (BPF_JMP|BPF_JA)) {
4837 if (insn->k == PASS)
4838 insn->k = msock_filter.len - idx - 2;
4839 else if (insn->k == FAIL)
4840 insn->k = msock_filter.len - idx - 3;
4841 }
4842
4843 if (insn->jt == PASS)
4844 insn->jt = msock_filter.len - idx - 2;
4845 else if (insn->jt == FAIL)
4846 insn->jt = msock_filter.len - idx - 3;
4847
4848 if (insn->jf == PASS)
4849 insn->jf = msock_filter.len - idx - 2;
4850 else if (insn->jf == FAIL)
4851 insn->jf = msock_filter.len - idx - 3;
4852 }
4853 }
4854
4855 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
4856 &msock_filter, sizeof(msock_filter))) {
4857 perror("SO_ATTACH_FILTER");
4858 return -1;
4859 }
4860
4861 return 0;
4862 }
4863
4864
4865 static void nl80211_remove_monitor_interface(
4866 struct wpa_driver_nl80211_data *drv)
4867 {
4868 if (drv->monitor_ifidx >= 0) {
4869 nl80211_remove_iface(drv, drv->monitor_ifidx);
4870 drv->monitor_ifidx = -1;
4871 }
4872 if (drv->monitor_sock >= 0) {
4873 eloop_unregister_read_sock(drv->monitor_sock);
4874 close(drv->monitor_sock);
4875 drv->monitor_sock = -1;
4876 }
4877 }
4878
4879
4880 static int
4881 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
4882 {
4883 char buf[IFNAMSIZ];
4884 struct sockaddr_ll ll;
4885 int optval;
4886 socklen_t optlen;
4887
4888 if (os_strncmp(drv->first_bss.ifname, "p2p-", 4) == 0) {
4889 /*
4890 * P2P interface name is of the format p2p-%s-%d. For monitor
4891 * interface name corresponding to P2P GO, replace "p2p-" with
4892 * "mon-" to retain the same interface name length and to
4893 * indicate that it is a monitor interface.
4894 */
4895 snprintf(buf, IFNAMSIZ, "mon-%s", drv->first_bss.ifname + 4);
4896 } else {
4897 /* Non-P2P interface with AP functionality. */
4898 snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
4899 }
4900
4901 buf[IFNAMSIZ - 1] = '\0';
4902
4903 drv->monitor_ifidx =
4904 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
4905 0);
4906
4907 if (drv->monitor_ifidx == -EOPNOTSUPP) {
4908 wpa_printf(MSG_DEBUG, "nl80211: Driver does not support "
4909 "monitor interface type - try to run without it");
4910 drv->no_monitor_iface_capab = 1;
4911 }
4912
4913 if (drv->monitor_ifidx < 0)
4914 return -1;
4915
4916 if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
4917 goto error;
4918
4919 memset(&ll, 0, sizeof(ll));
4920 ll.sll_family = AF_PACKET;
4921 ll.sll_ifindex = drv->monitor_ifidx;
4922 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
4923 if (drv->monitor_sock < 0) {
4924 perror("socket[PF_PACKET,SOCK_RAW]");
4925 goto error;
4926 }
4927
4928 if (add_monitor_filter(drv->monitor_sock)) {
4929 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
4930 "interface; do filtering in user space");
4931 /* This works, but will cost in performance. */
4932 }
4933
4934 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
4935 perror("monitor socket bind");
4936 goto error;
4937 }
4938
4939 optlen = sizeof(optval);
4940 optval = 20;
4941 if (setsockopt
4942 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
4943 perror("Failed to set socket priority");
4944 goto error;
4945 }
4946
4947 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
4948 drv, NULL)) {
4949 printf("Could not register monitor read socket\n");
4950 goto error;
4951 }
4952
4953 return 0;
4954 error:
4955 nl80211_remove_monitor_interface(drv);
4956 return -1;
4957 }
4958
4959
4960 #ifdef CONFIG_AP
4961 static int nl80211_send_eapol_data(struct i802_bss *bss,
4962 const u8 *addr, const u8 *data,
4963 size_t data_len, const u8 *own_addr)
4964 {
4965 if (bss->drv->l2 == NULL) {
4966 wpa_printf(MSG_DEBUG, "nl80211: No l2_packet to send EAPOL");
4967 return -1;
4968 }
4969
4970 if (l2_packet_send(bss->drv->l2, addr, ETH_P_EAPOL, data, data_len) <
4971 0)
4972 return -1;
4973 return 0;
4974 }
4975 #endif /* CONFIG_AP */
4976
4977
4978 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
4979
4980 static int wpa_driver_nl80211_hapd_send_eapol(
4981 void *priv, const u8 *addr, const u8 *data,
4982 size_t data_len, int encrypt, const u8 *own_addr, u32 flags)
4983 {
4984 struct i802_bss *bss = priv;
4985 struct wpa_driver_nl80211_data *drv = bss->drv;
4986 struct ieee80211_hdr *hdr;
4987 size_t len;
4988 u8 *pos;
4989 int res;
4990 int qos = flags & WPA_STA_WMM;
4991
4992 #ifdef CONFIG_AP
4993 if (drv->no_monitor_iface_capab)
4994 return nl80211_send_eapol_data(bss, addr, data, data_len,
4995 own_addr);
4996 #endif /* CONFIG_AP */
4997
4998 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
4999 data_len;
5000 hdr = os_zalloc(len);
5001 if (hdr == NULL) {
5002 printf("malloc() failed for i802_send_data(len=%lu)\n",
5003 (unsigned long) len);
5004 return -1;
5005 }
5006
5007 hdr->frame_control =
5008 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
5009 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
5010 if (encrypt)
5011 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
5012 if (qos) {
5013 hdr->frame_control |=
5014 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
5015 }
5016
5017 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
5018 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
5019 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
5020 pos = (u8 *) (hdr + 1);
5021
5022 if (qos) {
5023 /* add an empty QoS header if needed */
5024 pos[0] = 0;
5025 pos[1] = 0;
5026 pos += 2;
5027 }
5028
5029 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
5030 pos += sizeof(rfc1042_header);
5031 WPA_PUT_BE16(pos, ETH_P_PAE);
5032 pos += 2;
5033 memcpy(pos, data, data_len);
5034
5035 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
5036 if (res < 0) {
5037 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
5038 "failed: %d (%s)",
5039 (unsigned long) len, errno, strerror(errno));
5040 }
5041 os_free(hdr);
5042
5043 return res;
5044 }
5045
5046
5047 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
5048 int total_flags,
5049 int flags_or, int flags_and)
5050 {
5051 struct i802_bss *bss = priv;
5052 struct wpa_driver_nl80211_data *drv = bss->drv;
5053 struct nl_msg *msg, *flags = NULL;
5054 struct nl80211_sta_flag_update upd;
5055
5056 msg = nlmsg_alloc();
5057 if (!msg)
5058 return -ENOMEM;
5059
5060 flags = nlmsg_alloc();
5061 if (!flags) {
5062 nlmsg_free(msg);
5063 return -ENOMEM;
5064 }
5065
5066 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5067 0, NL80211_CMD_SET_STATION, 0);
5068
5069 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5070 if_nametoindex(bss->ifname));
5071 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5072
5073 /*
5074 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
5075 * can be removed eventually.
5076 */
5077 if (total_flags & WPA_STA_AUTHORIZED)
5078 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
5079
5080 if (total_flags & WPA_STA_WMM)
5081 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
5082
5083 if (total_flags & WPA_STA_SHORT_PREAMBLE)
5084 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
5085
5086 if (total_flags & WPA_STA_MFP)
5087 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
5088
5089 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
5090 goto nla_put_failure;
5091
5092 os_memset(&upd, 0, sizeof(upd));
5093 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
5094 upd.set = sta_flags_nl80211(flags_or);
5095 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
5096
5097 nlmsg_free(flags);
5098
5099 return send_and_recv_msgs(drv, msg, NULL, NULL);
5100 nla_put_failure:
5101 nlmsg_free(flags);
5102 return -ENOBUFS;
5103 }
5104
5105
5106 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
5107 struct wpa_driver_associate_params *params)
5108 {
5109 enum nl80211_iftype nlmode;
5110
5111 if (params->p2p) {
5112 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
5113 "group (GO)");
5114 nlmode = NL80211_IFTYPE_P2P_GO;
5115 } else
5116 nlmode = NL80211_IFTYPE_AP;
5117
5118 if (wpa_driver_nl80211_set_mode(&drv->first_bss, nlmode) ||
5119 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
5120 nl80211_remove_monitor_interface(drv);
5121 return -1;
5122 }
5123
5124 if (drv->no_monitor_iface_capab) {
5125 if (wpa_driver_nl80211_probe_req_report(&drv->first_bss, 1) < 0)
5126 {
5127 wpa_printf(MSG_DEBUG, "nl80211: Failed to enable "
5128 "Probe Request frame reporting in AP mode");
5129 /* Try to survive without this */
5130 }
5131 }
5132
5133 drv->ap_oper_freq = params->freq;
5134
5135 return 0;
5136 }
5137
5138
5139 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
5140 {
5141 struct nl_msg *msg;
5142 int ret = -1;
5143
5144 msg = nlmsg_alloc();
5145 if (!msg)
5146 return -1;
5147
5148 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5149 NL80211_CMD_LEAVE_IBSS, 0);
5150 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5151 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5152 msg = NULL;
5153 if (ret) {
5154 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
5155 "(%s)", ret, strerror(-ret));
5156 goto nla_put_failure;
5157 }
5158
5159 ret = 0;
5160 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
5161
5162 nla_put_failure:
5163 nlmsg_free(msg);
5164 return ret;
5165 }
5166
5167
5168 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
5169 struct wpa_driver_associate_params *params)
5170 {
5171 struct nl_msg *msg;
5172 int ret = -1;
5173 int count = 0;
5174
5175 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
5176
5177 if (wpa_driver_nl80211_set_mode(&drv->first_bss,
5178 NL80211_IFTYPE_ADHOC)) {
5179 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
5180 "IBSS mode");
5181 return -1;
5182 }
5183
5184 retry:
5185 msg = nlmsg_alloc();
5186 if (!msg)
5187 return -1;
5188
5189 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5190 NL80211_CMD_JOIN_IBSS, 0);
5191 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5192
5193 if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
5194 goto nla_put_failure;
5195
5196 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
5197 params->ssid, params->ssid_len);
5198 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
5199 params->ssid);
5200 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
5201 drv->ssid_len = params->ssid_len;
5202
5203 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
5204 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
5205
5206 ret = nl80211_set_conn_keys(params, msg);
5207 if (ret)
5208 goto nla_put_failure;
5209
5210 if (params->wpa_ie) {
5211 wpa_hexdump(MSG_DEBUG,
5212 " * Extra IEs for Beacon/Probe Response frames",
5213 params->wpa_ie, params->wpa_ie_len);
5214 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
5215 params->wpa_ie);
5216 }
5217
5218 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5219 msg = NULL;
5220 if (ret) {
5221 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
5222 ret, strerror(-ret));
5223 count++;
5224 if (ret == -EALREADY && count == 1) {
5225 wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
5226 "forced leave");
5227 nl80211_leave_ibss(drv);
5228 nlmsg_free(msg);
5229 goto retry;
5230 }
5231
5232 goto nla_put_failure;
5233 }
5234 ret = 0;
5235 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
5236
5237 nla_put_failure:
5238 nlmsg_free(msg);
5239 return ret;
5240 }
5241
5242
5243 static unsigned int nl80211_get_assoc_bssid(struct wpa_driver_nl80211_data *drv,
5244 u8 *bssid)
5245 {
5246 struct nl_msg *msg;
5247 int ret;
5248 struct nl80211_bss_info_arg arg;
5249
5250 os_memset(&arg, 0, sizeof(arg));
5251 msg = nlmsg_alloc();
5252 if (!msg)
5253 goto nla_put_failure;
5254
5255 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
5256 NL80211_CMD_GET_SCAN, 0);
5257 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5258
5259 arg.drv = drv;
5260 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
5261 msg = NULL;
5262 if (ret == 0) {
5263 if (is_zero_ether_addr(arg.assoc_bssid))
5264 return -ENOTCONN;
5265 os_memcpy(bssid, arg.assoc_bssid, ETH_ALEN);
5266 return 0;
5267 }
5268 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
5269 "(%s)", ret, strerror(-ret));
5270 nla_put_failure:
5271 nlmsg_free(msg);
5272 return drv->assoc_freq;
5273 }
5274
5275
5276 static int nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
5277 const u8 *bssid)
5278 {
5279 u8 addr[ETH_ALEN];
5280
5281 if (bssid == NULL) {
5282 int res = nl80211_get_assoc_bssid(drv, addr);
5283 if (res)
5284 return res;
5285 bssid = addr;
5286 }
5287
5288 return wpa_driver_nl80211_disconnect(drv, bssid,
5289 WLAN_REASON_PREV_AUTH_NOT_VALID);
5290 }
5291
5292
5293 static int wpa_driver_nl80211_connect(
5294 struct wpa_driver_nl80211_data *drv,
5295 struct wpa_driver_associate_params *params)
5296 {
5297 struct nl_msg *msg;
5298 enum nl80211_auth_type type;
5299 int ret = 0;
5300 int algs;
5301
5302 msg = nlmsg_alloc();
5303 if (!msg)
5304 return -1;
5305
5306 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
5307 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5308 NL80211_CMD_CONNECT, 0);
5309
5310 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5311 if (params->bssid) {
5312 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
5313 MAC2STR(params->bssid));
5314 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
5315 }
5316 if (params->freq) {
5317 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
5318 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
5319 }
5320 if (params->ssid) {
5321 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
5322 params->ssid, params->ssid_len);
5323 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
5324 params->ssid);
5325 if (params->ssid_len > sizeof(drv->ssid))
5326 goto nla_put_failure;
5327 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
5328 drv->ssid_len = params->ssid_len;
5329 }
5330 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
5331 if (params->wpa_ie)
5332 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
5333 params->wpa_ie);
5334
5335 algs = 0;
5336 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
5337 algs++;
5338 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
5339 algs++;
5340 if (params->auth_alg & WPA_AUTH_ALG_LEAP)
5341 algs++;
5342 if (algs > 1) {
5343 wpa_printf(MSG_DEBUG, " * Leave out Auth Type for automatic "
5344 "selection");
5345 goto skip_auth_type;
5346 }
5347
5348 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
5349 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
5350 else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
5351 type = NL80211_AUTHTYPE_SHARED_KEY;
5352 else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
5353 type = NL80211_AUTHTYPE_NETWORK_EAP;
5354 else if (params->auth_alg & WPA_AUTH_ALG_FT)
5355 type = NL80211_AUTHTYPE_FT;
5356 else
5357 goto nla_put_failure;
5358
5359 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
5360 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
5361
5362 skip_auth_type:
5363 if (params->wpa_proto) {
5364 enum nl80211_wpa_versions ver = 0;
5365
5366 if (params->wpa_proto & WPA_PROTO_WPA)
5367 ver |= NL80211_WPA_VERSION_1;
5368 if (params->wpa_proto & WPA_PROTO_RSN)
5369 ver |= NL80211_WPA_VERSION_2;
5370
5371 wpa_printf(MSG_DEBUG, " * WPA Versions 0x%x", ver);
5372 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
5373 }
5374
5375 if (params->pairwise_suite != CIPHER_NONE) {
5376 int cipher;
5377
5378 switch (params->pairwise_suite) {
5379 case CIPHER_WEP40:
5380 cipher = WLAN_CIPHER_SUITE_WEP40;
5381 break;
5382 case CIPHER_WEP104:
5383 cipher = WLAN_CIPHER_SUITE_WEP104;
5384 break;
5385 case CIPHER_CCMP:
5386 cipher = WLAN_CIPHER_SUITE_CCMP;
5387 break;
5388 case CIPHER_TKIP:
5389 default:
5390 cipher = WLAN_CIPHER_SUITE_TKIP;
5391 break;
5392 }
5393 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
5394 }
5395
5396 if (params->group_suite != CIPHER_NONE) {
5397 int cipher;
5398
5399 switch (params->group_suite) {
5400 case CIPHER_WEP40:
5401 cipher = WLAN_CIPHER_SUITE_WEP40;
5402 break;
5403 case CIPHER_WEP104:
5404 cipher = WLAN_CIPHER_SUITE_WEP104;
5405 break;
5406 case CIPHER_CCMP:
5407 cipher = WLAN_CIPHER_SUITE_CCMP;
5408 break;
5409 case CIPHER_TKIP:
5410 default:
5411 cipher = WLAN_CIPHER_SUITE_TKIP;
5412 break;
5413 }
5414 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
5415 }
5416
5417 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
5418 params->key_mgmt_suite == KEY_MGMT_PSK) {
5419 int mgmt = WLAN_AKM_SUITE_PSK;
5420
5421 switch (params->key_mgmt_suite) {
5422 case KEY_MGMT_802_1X:
5423 mgmt = WLAN_AKM_SUITE_8021X;
5424 break;
5425 case KEY_MGMT_PSK:
5426 default:
5427 mgmt = WLAN_AKM_SUITE_PSK;
5428 break;
5429 }
5430 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
5431 }
5432
5433 ret = nl80211_set_conn_keys(params, msg);
5434 if (ret)
5435 goto nla_put_failure;
5436
5437 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5438 msg = NULL;
5439 if (ret) {
5440 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
5441 "(%s)", ret, strerror(-ret));
5442 /*
5443 * cfg80211 does not currently accept new connection if we are
5444 * already connected. As a workaround, force disconnection and
5445 * try again once the driver indicates it completed
5446 * disconnection.
5447 */
5448 if (ret == -EALREADY)
5449 nl80211_disconnect(drv, params->bssid);
5450 goto nla_put_failure;
5451 }
5452 ret = 0;
5453 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
5454
5455 nla_put_failure:
5456 nlmsg_free(msg);
5457 return ret;
5458
5459 }
5460
5461
5462 static int wpa_driver_nl80211_associate(
5463 void *priv, struct wpa_driver_associate_params *params)
5464 {
5465 struct i802_bss *bss = priv;
5466 struct wpa_driver_nl80211_data *drv = bss->drv;
5467 int ret = -1;
5468 struct nl_msg *msg;
5469
5470 if (params->mode == IEEE80211_MODE_AP)
5471 return wpa_driver_nl80211_ap(drv, params);
5472
5473 if (params->mode == IEEE80211_MODE_IBSS)
5474 return wpa_driver_nl80211_ibss(drv, params);
5475
5476 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
5477 enum nl80211_iftype nlmode = params->p2p ?
5478 NL80211_IFTYPE_P2P_CLIENT : NL80211_IFTYPE_STATION;
5479
5480 if (wpa_driver_nl80211_set_mode(priv, nlmode) < 0)
5481 return -1;
5482 return wpa_driver_nl80211_connect(drv, params);
5483 }
5484
5485 drv->associated = 0;
5486
5487 msg = nlmsg_alloc();
5488 if (!msg)
5489 return -1;
5490
5491 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
5492 drv->ifindex);
5493 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5494 NL80211_CMD_ASSOCIATE, 0);
5495
5496 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5497 if (params->bssid) {
5498 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
5499 MAC2STR(params->bssid));
5500 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
5501 }
5502 if (params->freq) {
5503 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
5504 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
5505 drv->assoc_freq = params->freq;
5506 } else
5507 drv->assoc_freq = 0;
5508 if (params->ssid) {
5509 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
5510 params->ssid, params->ssid_len);
5511 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
5512 params->ssid);
5513 if (params->ssid_len > sizeof(drv->ssid))
5514 goto nla_put_failure;
5515 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
5516 drv->ssid_len = params->ssid_len;
5517 }
5518 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
5519 if (params->wpa_ie)
5520 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
5521 params->wpa_ie);
5522
5523 if (params->pairwise_suite != CIPHER_NONE) {
5524 int cipher;
5525
5526 switch (params->pairwise_suite) {
5527 case CIPHER_WEP40:
5528 cipher = WLAN_CIPHER_SUITE_WEP40;
5529 break;
5530 case CIPHER_WEP104:
5531 cipher = WLAN_CIPHER_SUITE_WEP104;
5532 break;
5533 case CIPHER_CCMP:
5534 cipher = WLAN_CIPHER_SUITE_CCMP;
5535 break;
5536 case CIPHER_TKIP:
5537 default:
5538 cipher = WLAN_CIPHER_SUITE_TKIP;
5539 break;
5540 }
5541 wpa_printf(MSG_DEBUG, " * pairwise=0x%x", cipher);
5542 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
5543 }
5544
5545 if (params->group_suite != CIPHER_NONE) {
5546 int cipher;
5547
5548 switch (params->group_suite) {
5549 case CIPHER_WEP40:
5550 cipher = WLAN_CIPHER_SUITE_WEP40;
5551 break;
5552 case CIPHER_WEP104:
5553 cipher = WLAN_CIPHER_SUITE_WEP104;
5554 break;
5555 case CIPHER_CCMP:
5556 cipher = WLAN_CIPHER_SUITE_CCMP;
5557 break;
5558 case CIPHER_TKIP:
5559 default:
5560 cipher = WLAN_CIPHER_SUITE_TKIP;
5561 break;
5562 }
5563 wpa_printf(MSG_DEBUG, " * group=0x%x", cipher);
5564 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
5565 }
5566
5567 #ifdef CONFIG_IEEE80211W
5568 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
5569 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
5570 #endif /* CONFIG_IEEE80211W */
5571
5572 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
5573
5574 if (params->prev_bssid) {
5575 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
5576 MAC2STR(params->prev_bssid));
5577 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
5578 params->prev_bssid);
5579 }
5580
5581 if (params->p2p)
5582 wpa_printf(MSG_DEBUG, " * P2P group");
5583
5584 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5585 msg = NULL;
5586 if (ret) {
5587 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
5588 "(%s)", ret, strerror(-ret));
5589 nl80211_dump_scan(drv);
5590 goto nla_put_failure;
5591 }
5592 ret = 0;
5593 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
5594 "successfully");
5595
5596 nla_put_failure:
5597 nlmsg_free(msg);
5598 return ret;
5599 }
5600
5601
5602 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
5603 int ifindex, enum nl80211_iftype mode)
5604 {
5605 struct nl_msg *msg;
5606 int ret = -ENOBUFS;
5607
5608 wpa_printf(MSG_DEBUG, "nl80211: Set mode ifindex %d iftype %d (%s)",
5609 ifindex, mode, nl80211_iftype_str(mode));
5610
5611 msg = nlmsg_alloc();
5612 if (!msg)
5613 return -ENOMEM;
5614
5615 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5616 0, NL80211_CMD_SET_INTERFACE, 0);
5617 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5618 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
5619
5620 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5621 if (!ret)
5622 return 0;
5623 nla_put_failure:
5624 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
5625 " %d (%s)", ifindex, mode, ret, strerror(-ret));
5626 return ret;
5627 }
5628
5629
5630 static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
5631 enum nl80211_iftype nlmode)
5632 {
5633 struct wpa_driver_nl80211_data *drv = bss->drv;
5634 int ret = -1;
5635 int i;
5636 int was_ap = is_ap_interface(drv->nlmode);
5637
5638 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
5639 drv->nlmode = nlmode;
5640 ret = 0;
5641 goto done;
5642 }
5643
5644 if (nlmode == drv->nlmode) {
5645 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
5646 "requested mode - ignore error");
5647 ret = 0;
5648 goto done; /* Already in the requested mode */
5649 }
5650
5651 /* mac80211 doesn't allow mode changes while the device is up, so
5652 * take the device down, try to set the mode again, and bring the
5653 * device back up.
5654 */
5655 wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
5656 "interface down");
5657 for (i = 0; i < 10; i++) {
5658 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
5659 0) {
5660 /* Try to set the mode again while the interface is
5661 * down */
5662 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
5663 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
5664 1))
5665 ret = -1;
5666 if (!ret)
5667 break;
5668 } else
5669 wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
5670 "interface down");
5671 os_sleep(0, 100000);
5672 }
5673
5674 if (!ret) {
5675 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
5676 "interface is down");
5677 drv->nlmode = nlmode;
5678 drv->ignore_if_down_event = 1;
5679 }
5680
5681 done:
5682 if (!ret && is_ap_interface(nlmode)) {
5683 /* Setup additional AP mode functionality if needed */
5684 if (!drv->no_monitor_iface_capab && drv->monitor_ifidx < 0 &&
5685 nl80211_create_monitor_interface(drv) &&
5686 !drv->no_monitor_iface_capab)
5687 return -1;
5688 } else if (!ret && !is_ap_interface(nlmode)) {
5689 /* Remove additional AP mode functionality */
5690 if (was_ap && drv->no_monitor_iface_capab)
5691 wpa_driver_nl80211_probe_req_report(bss, 0);
5692 nl80211_remove_monitor_interface(drv);
5693 bss->beacon_set = 0;
5694 }
5695
5696 if (ret)
5697 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
5698 "from %d failed", nlmode, drv->nlmode);
5699
5700 return ret;
5701 }
5702
5703
5704 static int wpa_driver_nl80211_get_capa(void *priv,
5705 struct wpa_driver_capa *capa)
5706 {
5707 struct i802_bss *bss = priv;
5708 struct wpa_driver_nl80211_data *drv = bss->drv;
5709 if (!drv->has_capability)
5710 return -1;
5711 os_memcpy(capa, &drv->capa, sizeof(*capa));
5712 return 0;
5713 }
5714
5715
5716 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
5717 {
5718 struct i802_bss *bss = priv;
5719 struct wpa_driver_nl80211_data *drv = bss->drv;
5720
5721 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
5722 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
5723 drv->operstate = state;
5724 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
5725 state ? IF_OPER_UP : IF_OPER_DORMANT);
5726 }
5727
5728
5729 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
5730 {
5731 struct i802_bss *bss = priv;
5732 struct wpa_driver_nl80211_data *drv = bss->drv;
5733 struct nl_msg *msg;
5734 struct nl80211_sta_flag_update upd;
5735
5736 msg = nlmsg_alloc();
5737 if (!msg)
5738 return -ENOMEM;
5739
5740 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5741 0, NL80211_CMD_SET_STATION, 0);
5742
5743 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5744 if_nametoindex(bss->ifname));
5745 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
5746
5747 os_memset(&upd, 0, sizeof(upd));
5748 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
5749 if (authorized)
5750 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
5751 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
5752
5753 return send_and_recv_msgs(drv, msg, NULL, NULL);
5754 nla_put_failure:
5755 return -ENOBUFS;
5756 }
5757
5758
5759 /* Set kernel driver on given frequency (MHz) */
5760 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
5761 {
5762 struct i802_bss *bss = priv;
5763 struct wpa_driver_nl80211_data *drv = bss->drv;
5764 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
5765 freq->sec_channel_offset);
5766 }
5767
5768
5769 #if defined(HOSTAPD) || defined(CONFIG_AP)
5770
5771 static inline int min_int(int a, int b)
5772 {
5773 if (a < b)
5774 return a;
5775 return b;
5776 }
5777
5778
5779 static int get_key_handler(struct nl_msg *msg, void *arg)
5780 {
5781 struct nlattr *tb[NL80211_ATTR_MAX + 1];
5782 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5783
5784 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5785 genlmsg_attrlen(gnlh, 0), NULL);
5786
5787 /*
5788 * TODO: validate the key index and mac address!
5789 * Otherwise, there's a race condition as soon as
5790 * the kernel starts sending key notifications.
5791 */
5792
5793 if (tb[NL80211_ATTR_KEY_SEQ])
5794 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
5795 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
5796 return NL_SKIP;
5797 }
5798
5799
5800 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
5801 int idx, u8 *seq)
5802 {
5803 struct i802_bss *bss = priv;
5804 struct wpa_driver_nl80211_data *drv = bss->drv;
5805 struct nl_msg *msg;
5806
5807 msg = nlmsg_alloc();
5808 if (!msg)
5809 return -ENOMEM;
5810
5811 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5812 0, NL80211_CMD_GET_KEY, 0);
5813
5814 if (addr)
5815 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5816 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
5817 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
5818
5819 memset(seq, 0, 6);
5820
5821 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
5822 nla_put_failure:
5823 return -ENOBUFS;
5824 }
5825
5826
5827 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
5828 int mode)
5829 {
5830 struct i802_bss *bss = priv;
5831 struct wpa_driver_nl80211_data *drv = bss->drv;
5832 struct nl_msg *msg;
5833 u8 rates[NL80211_MAX_SUPP_RATES];
5834 u8 rates_len = 0;
5835 int i;
5836
5837 msg = nlmsg_alloc();
5838 if (!msg)
5839 return -ENOMEM;
5840
5841 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5842 NL80211_CMD_SET_BSS, 0);
5843
5844 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
5845 rates[rates_len++] = basic_rates[i] / 5;
5846
5847 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
5848
5849 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
5850
5851 return send_and_recv_msgs(drv, msg, NULL, NULL);
5852 nla_put_failure:
5853 return -ENOBUFS;
5854 }
5855
5856
5857 static int i802_set_rts(void *priv, int rts)
5858 {
5859 struct i802_bss *bss = priv;
5860 struct wpa_driver_nl80211_data *drv = bss->drv;
5861 struct nl_msg *msg;
5862 int ret = -ENOBUFS;
5863 u32 val;
5864
5865 msg = nlmsg_alloc();
5866 if (!msg)
5867 return -ENOMEM;
5868
5869 if (rts >= 2347)
5870 val = (u32) -1;
5871 else
5872 val = rts;
5873
5874 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5875 0, NL80211_CMD_SET_WIPHY, 0);
5876 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5877 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
5878
5879 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5880 if (!ret)
5881 return 0;
5882 nla_put_failure:
5883 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
5884 "%d (%s)", rts, ret, strerror(-ret));
5885 return ret;
5886 }
5887
5888
5889 static int i802_set_frag(void *priv, int frag)
5890 {
5891 struct i802_bss *bss = priv;
5892 struct wpa_driver_nl80211_data *drv = bss->drv;
5893 struct nl_msg *msg;
5894 int ret = -ENOBUFS;
5895 u32 val;
5896
5897 msg = nlmsg_alloc();
5898 if (!msg)
5899 return -ENOMEM;
5900
5901 if (frag >= 2346)
5902 val = (u32) -1;
5903 else
5904 val = frag;
5905
5906 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5907 0, NL80211_CMD_SET_WIPHY, 0);
5908 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5909 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
5910
5911 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5912 if (!ret)
5913 return 0;
5914 nla_put_failure:
5915 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
5916 "%d: %d (%s)", frag, ret, strerror(-ret));
5917 return ret;
5918 }
5919
5920
5921 static int i802_flush(void *priv)
5922 {
5923 struct i802_bss *bss = priv;
5924 struct wpa_driver_nl80211_data *drv = bss->drv;
5925 struct nl_msg *msg;
5926
5927 msg = nlmsg_alloc();
5928 if (!msg)
5929 return -1;
5930
5931 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5932 0, NL80211_CMD_DEL_STATION, 0);
5933
5934 /*
5935 * XXX: FIX! this needs to flush all VLANs too
5936 */
5937 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5938 if_nametoindex(bss->ifname));
5939
5940 return send_and_recv_msgs(drv, msg, NULL, NULL);
5941 nla_put_failure:
5942 return -ENOBUFS;
5943 }
5944
5945
5946 static int get_sta_handler(struct nl_msg *msg, void *arg)
5947 {
5948 struct nlattr *tb[NL80211_ATTR_MAX + 1];
5949 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5950 struct hostap_sta_driver_data *data = arg;
5951 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
5952 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
5953 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
5954 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
5955 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
5956 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
5957 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
5958 };
5959
5960 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5961 genlmsg_attrlen(gnlh, 0), NULL);
5962
5963 /*
5964 * TODO: validate the interface and mac address!
5965 * Otherwise, there's a race condition as soon as
5966 * the kernel starts sending station notifications.
5967 */
5968
5969 if (!tb[NL80211_ATTR_STA_INFO]) {
5970 wpa_printf(MSG_DEBUG, "sta stats missing!");
5971 return NL_SKIP;
5972 }
5973 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
5974 tb[NL80211_ATTR_STA_INFO],
5975 stats_policy)) {
5976 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
5977 return NL_SKIP;
5978 }
5979
5980 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
5981 data->inactive_msec =
5982 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
5983 if (stats[NL80211_STA_INFO_RX_BYTES])
5984 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
5985 if (stats[NL80211_STA_INFO_TX_BYTES])
5986 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
5987 if (stats[NL80211_STA_INFO_RX_PACKETS])
5988 data->rx_packets =
5989 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
5990 if (stats[NL80211_STA_INFO_TX_PACKETS])
5991 data->tx_packets =
5992 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
5993
5994 return NL_SKIP;
5995 }
5996
5997 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
5998 const u8 *addr)
5999 {
6000 struct i802_bss *bss = priv;
6001 struct wpa_driver_nl80211_data *drv = bss->drv;
6002 struct nl_msg *msg;
6003
6004 os_memset(data, 0, sizeof(*data));
6005 msg = nlmsg_alloc();
6006 if (!msg)
6007 return -ENOMEM;
6008
6009 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
6010 0, NL80211_CMD_GET_STATION, 0);
6011
6012 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6013 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
6014
6015 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
6016 nla_put_failure:
6017 return -ENOBUFS;
6018 }
6019
6020
6021 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
6022 int cw_min, int cw_max, int burst_time)
6023 {
6024 struct i802_bss *bss = priv;
6025 struct wpa_driver_nl80211_data *drv = bss->drv;
6026 struct nl_msg *msg;
6027 struct nlattr *txq, *params;
6028
6029 msg = nlmsg_alloc();
6030 if (!msg)
6031 return -1;
6032
6033 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
6034 0, NL80211_CMD_SET_WIPHY, 0);
6035
6036 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
6037
6038 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
6039 if (!txq)
6040 goto nla_put_failure;
6041
6042 /* We are only sending parameters for a single TXQ at a time */
6043 params = nla_nest_start(msg, 1);
6044 if (!params)
6045 goto nla_put_failure;
6046
6047 switch (queue) {
6048 case 0:
6049 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VO);
6050 break;
6051 case 1:
6052 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VI);
6053 break;
6054 case 2:
6055 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BE);
6056 break;
6057 case 3:
6058 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BK);
6059 break;
6060 }
6061 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
6062 * 32 usec, so need to convert the value here. */
6063 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
6064 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
6065 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
6066 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
6067
6068 nla_nest_end(msg, params);
6069
6070 nla_nest_end(msg, txq);
6071
6072 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
6073 return 0;
6074 nla_put_failure:
6075 return -1;
6076 }
6077
6078
6079 static int i802_set_bss(void *priv, int cts, int preamble, int slot,
6080 int ht_opmode)
6081 {
6082 struct i802_bss *bss = priv;
6083 struct wpa_driver_nl80211_data *drv = bss->drv;
6084 struct nl_msg *msg;
6085
6086 msg = nlmsg_alloc();
6087 if (!msg)
6088 return -ENOMEM;
6089
6090 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
6091 NL80211_CMD_SET_BSS, 0);
6092
6093 if (cts >= 0)
6094 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
6095 if (preamble >= 0)
6096 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
6097 if (slot >= 0)
6098 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
6099 if (ht_opmode >= 0)
6100 NLA_PUT_U16(msg, NL80211_ATTR_BSS_HT_OPMODE, ht_opmode);
6101 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
6102
6103 return send_and_recv_msgs(drv, msg, NULL, NULL);
6104 nla_put_failure:
6105 return -ENOBUFS;
6106 }
6107
6108
6109 static int i802_set_cts_protect(void *priv, int value)
6110 {
6111 return i802_set_bss(priv, value, -1, -1, -1);
6112 }
6113
6114
6115 static int i802_set_preamble(void *priv, int value)
6116 {
6117 return i802_set_bss(priv, -1, value, -1, -1);
6118 }
6119
6120
6121 static int i802_set_short_slot_time(void *priv, int value)
6122 {
6123 return i802_set_bss(priv, -1, -1, value, -1);
6124 }
6125
6126
6127 static int i802_set_sta_vlan(void *priv, const u8 *addr,
6128 const char *ifname, int vlan_id)
6129 {
6130 struct i802_bss *bss = priv;
6131 struct wpa_driver_nl80211_data *drv = bss->drv;
6132 struct nl_msg *msg;
6133 int ret = -ENOBUFS;
6134
6135 msg = nlmsg_alloc();
6136 if (!msg)
6137 return -ENOMEM;
6138
6139 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
6140 0, NL80211_CMD_SET_STATION, 0);
6141
6142 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
6143 if_nametoindex(bss->ifname));
6144 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6145 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
6146 if_nametoindex(ifname));
6147
6148 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6149 if (ret < 0) {
6150 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
6151 MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
6152 MAC2STR(addr), ifname, vlan_id, ret,
6153 strerror(-ret));
6154 }
6155 nla_put_failure:
6156 return ret;
6157 }
6158
6159
6160 static int i802_set_ht_params(void *priv, const u8 *ht_capab,
6161 size_t ht_capab_len, const u8 *ht_oper,
6162 size_t ht_oper_len)
6163 {
6164 if (ht_oper_len >= 6) {
6165 /* ht opmode uses 16bit in octet 5 & 6 */
6166 u16 ht_opmode = le_to_host16(((u16 *) ht_oper)[2]);
6167 return i802_set_bss(priv, -1, -1, -1, ht_opmode);
6168 } else
6169 return -1;
6170 }
6171
6172
6173 static int i802_get_inact_sec(void *priv, const u8 *addr)
6174 {
6175 struct hostap_sta_driver_data data;
6176 int ret;
6177
6178 data.inactive_msec = (unsigned long) -1;
6179 ret = i802_read_sta_data(priv, &data, addr);
6180 if (ret || data.inactive_msec == (unsigned long) -1)
6181 return -1;
6182 return data.inactive_msec / 1000;
6183 }
6184
6185
6186 static int i802_sta_clear_stats(void *priv, const u8 *addr)
6187 {
6188 #if 0
6189 /* TODO */
6190 #endif
6191 return 0;
6192 }
6193
6194
6195 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
6196 int reason)
6197 {
6198 struct i802_bss *bss = priv;
6199 struct ieee80211_mgmt mgmt;
6200
6201 memset(&mgmt, 0, sizeof(mgmt));
6202 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
6203 WLAN_FC_STYPE_DEAUTH);
6204 memcpy(mgmt.da, addr, ETH_ALEN);
6205 memcpy(mgmt.sa, own_addr, ETH_ALEN);
6206 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
6207 mgmt.u.deauth.reason_code = host_to_le16(reason);
6208 return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
6209 IEEE80211_HDRLEN +
6210 sizeof(mgmt.u.deauth));
6211 }
6212
6213
6214 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
6215 int reason)
6216 {
6217 struct i802_bss *bss = priv;
6218 struct ieee80211_mgmt mgmt;
6219
6220 memset(&mgmt, 0, sizeof(mgmt));
6221 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
6222 WLAN_FC_STYPE_DISASSOC);
6223 memcpy(mgmt.da, addr, ETH_ALEN);
6224 memcpy(mgmt.sa, own_addr, ETH_ALEN);
6225 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
6226 mgmt.u.disassoc.reason_code = host_to_le16(reason);
6227 return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
6228 IEEE80211_HDRLEN +
6229 sizeof(mgmt.u.disassoc));
6230 }
6231
6232 #endif /* HOSTAPD || CONFIG_AP */
6233
6234 #ifdef HOSTAPD
6235
6236 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
6237 {
6238 int i;
6239 int *old;
6240
6241 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
6242 ifidx);
6243 for (i = 0; i < drv->num_if_indices; i++) {
6244 if (drv->if_indices[i] == 0) {
6245 drv->if_indices[i] = ifidx;
6246 return;
6247 }
6248 }
6249
6250 if (drv->if_indices != drv->default_if_indices)
6251 old = drv->if_indices;
6252 else
6253 old = NULL;
6254
6255 drv->if_indices = os_realloc(old,
6256 sizeof(int) * (drv->num_if_indices + 1));
6257 if (!drv->if_indices) {
6258 if (!old)
6259 drv->if_indices = drv->default_if_indices;
6260 else
6261 drv->if_indices = old;
6262 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
6263 "interfaces");
6264 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
6265 return;
6266 } else if (!old)
6267 os_memcpy(drv->if_indices, drv->default_if_indices,
6268 sizeof(drv->default_if_indices));
6269 drv->if_indices[drv->num_if_indices] = ifidx;
6270 drv->num_if_indices++;
6271 }
6272
6273
6274 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
6275 {
6276 int i;
6277
6278 for (i = 0; i < drv->num_if_indices; i++) {
6279 if (drv->if_indices[i] == ifidx) {
6280 drv->if_indices[i] = 0;
6281 break;
6282 }
6283 }
6284 }
6285
6286
6287 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
6288 {
6289 int i;
6290
6291 for (i = 0; i < drv->num_if_indices; i++)
6292 if (drv->if_indices[i] == ifidx)
6293 return 1;
6294
6295 return 0;
6296 }
6297
6298
6299 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val,
6300 const char *bridge_ifname)
6301 {
6302 struct i802_bss *bss = priv;
6303 struct wpa_driver_nl80211_data *drv = bss->drv;
6304 char name[IFNAMSIZ + 1];
6305
6306 os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
6307 wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
6308 " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
6309 if (val) {
6310 if (!if_nametoindex(name)) {
6311 if (nl80211_create_iface(drv, name,
6312 NL80211_IFTYPE_AP_VLAN,
6313 NULL, 1) < 0)
6314 return -1;
6315 if (bridge_ifname &&
6316 linux_br_add_if(drv->ioctl_sock, bridge_ifname,
6317 name) < 0)
6318 return -1;
6319 }
6320 linux_set_iface_flags(drv->ioctl_sock, name, 1);
6321 return i802_set_sta_vlan(priv, addr, name, 0);
6322 } else {
6323 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
6324 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
6325 name);
6326 }
6327 }
6328
6329
6330 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
6331 {
6332 struct wpa_driver_nl80211_data *drv = eloop_ctx;
6333 struct sockaddr_ll lladdr;
6334 unsigned char buf[3000];
6335 int len;
6336 socklen_t fromlen = sizeof(lladdr);
6337
6338 len = recvfrom(sock, buf, sizeof(buf), 0,
6339 (struct sockaddr *)&lladdr, &fromlen);
6340 if (len < 0) {
6341 perror("recv");
6342 return;
6343 }
6344
6345 if (have_ifidx(drv, lladdr.sll_ifindex))
6346 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
6347 }
6348
6349
6350 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
6351 struct i802_bss *bss,
6352 const char *brname, const char *ifname)
6353 {
6354 int ifindex;
6355 char in_br[IFNAMSIZ];
6356
6357 os_strlcpy(bss->brname, brname, IFNAMSIZ);
6358 ifindex = if_nametoindex(brname);
6359 if (ifindex == 0) {
6360 /*
6361 * Bridge was configured, but the bridge device does
6362 * not exist. Try to add it now.
6363 */
6364 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
6365 wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
6366 "bridge interface %s: %s",
6367 brname, strerror(errno));
6368 return -1;
6369 }
6370 bss->added_bridge = 1;
6371 add_ifidx(drv, if_nametoindex(brname));
6372 }
6373
6374 if (linux_br_get(in_br, ifname) == 0) {
6375 if (os_strcmp(in_br, brname) == 0)
6376 return 0; /* already in the bridge */
6377
6378 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
6379 "bridge %s", ifname, in_br);
6380 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
6381 wpa_printf(MSG_ERROR, "nl80211: Failed to "
6382 "remove interface %s from bridge "
6383 "%s: %s",
6384 ifname, brname, strerror(errno));
6385 return -1;
6386 }
6387 }
6388
6389 wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
6390 ifname, brname);
6391 if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
6392 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
6393 "into bridge %s: %s",
6394 ifname, brname, strerror(errno));
6395 return -1;
6396 }
6397 bss->added_if_into_bridge = 1;
6398
6399 return 0;
6400 }
6401
6402
6403 static void *i802_init(struct hostapd_data *hapd,
6404 struct wpa_init_params *params)
6405 {
6406 struct wpa_driver_nl80211_data *drv;
6407 struct i802_bss *bss;
6408 size_t i;
6409 char brname[IFNAMSIZ];
6410 int ifindex, br_ifindex;
6411 int br_added = 0;
6412
6413 bss = wpa_driver_nl80211_init(hapd, params->ifname, NULL);
6414 if (bss == NULL)
6415 return NULL;
6416
6417 drv = bss->drv;
6418 drv->nlmode = NL80211_IFTYPE_AP;
6419 if (linux_br_get(brname, params->ifname) == 0) {
6420 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
6421 params->ifname, brname);
6422 br_ifindex = if_nametoindex(brname);
6423 } else {
6424 brname[0] = '\0';
6425 br_ifindex = 0;
6426 }
6427
6428 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
6429 drv->if_indices = drv->default_if_indices;
6430 for (i = 0; i < params->num_bridge; i++) {
6431 if (params->bridge[i]) {
6432 ifindex = if_nametoindex(params->bridge[i]);
6433 if (ifindex)
6434 add_ifidx(drv, ifindex);
6435 if (ifindex == br_ifindex)
6436 br_added = 1;
6437 }
6438 }
6439 if (!br_added && br_ifindex &&
6440 (params->num_bridge == 0 || !params->bridge[0]))
6441 add_ifidx(drv, br_ifindex);
6442
6443 /* start listening for EAPOL on the default AP interface */
6444 add_ifidx(drv, drv->ifindex);
6445
6446 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
6447 goto failed;
6448
6449 if (params->bssid) {
6450 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
6451 params->bssid))
6452 goto failed;
6453 }
6454
6455 if (wpa_driver_nl80211_set_mode(bss, drv->nlmode)) {
6456 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
6457 "into AP mode", bss->ifname);
6458 goto failed;
6459 }
6460
6461 if (params->num_bridge && params->bridge[0] &&
6462 i802_check_bridge(drv, bss, params->bridge[0], params->ifname) < 0)
6463 goto failed;
6464
6465 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
6466 goto failed;
6467
6468 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
6469 if (drv->eapol_sock < 0) {
6470 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
6471 goto failed;
6472 }
6473
6474 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
6475 {
6476 printf("Could not register read socket for eapol\n");
6477 goto failed;
6478 }
6479
6480 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
6481 goto failed;
6482
6483 return bss;
6484
6485 failed:
6486 nl80211_remove_monitor_interface(drv);
6487 rfkill_deinit(drv->rfkill);
6488 netlink_deinit(drv->netlink);
6489 if (drv->ioctl_sock >= 0)
6490 close(drv->ioctl_sock);
6491
6492 genl_family_put(drv->nl80211);
6493 nl_cache_free(drv->nl_cache);
6494 nl80211_handle_destroy(drv->nl_handle);
6495 nl_cb_put(drv->nl_cb);
6496 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
6497
6498 os_free(drv);
6499 return NULL;
6500 }
6501
6502
6503 static void i802_deinit(void *priv)
6504 {
6505 wpa_driver_nl80211_deinit(priv);
6506 }
6507
6508 #endif /* HOSTAPD */
6509
6510
6511 static enum nl80211_iftype wpa_driver_nl80211_if_type(
6512 enum wpa_driver_if_type type)
6513 {
6514 switch (type) {
6515 case WPA_IF_STATION:
6516 return NL80211_IFTYPE_STATION;
6517 case WPA_IF_P2P_CLIENT:
6518 case WPA_IF_P2P_GROUP:
6519 return NL80211_IFTYPE_P2P_CLIENT;
6520 case WPA_IF_AP_VLAN:
6521 return NL80211_IFTYPE_AP_VLAN;
6522 case WPA_IF_AP_BSS:
6523 return NL80211_IFTYPE_AP;
6524 case WPA_IF_P2P_GO:
6525 return NL80211_IFTYPE_P2P_GO;
6526 }
6527 return -1;
6528 }
6529
6530
6531 #ifdef CONFIG_P2P
6532
6533 static int nl80211_addr_in_use(struct nl80211_global *global, const u8 *addr)
6534 {
6535 struct wpa_driver_nl80211_data *drv;
6536 dl_list_for_each(drv, &global->interfaces,
6537 struct wpa_driver_nl80211_data, list) {
6538 if (os_memcmp(addr, drv->addr, ETH_ALEN) == 0)
6539 return 1;
6540 }
6541 return 0;
6542 }
6543
6544
6545 static int nl80211_p2p_interface_addr(struct wpa_driver_nl80211_data *drv,
6546 u8 *new_addr)
6547 {
6548 unsigned int idx;
6549
6550 if (!drv->global)
6551 return -1;
6552
6553 os_memcpy(new_addr, drv->addr, ETH_ALEN);
6554 for (idx = 0; idx < 64; idx++) {
6555 new_addr[0] = drv->addr[0] | 0x02;
6556 new_addr[0] ^= idx << 2;
6557 if (!nl80211_addr_in_use(drv->global, new_addr))
6558 break;
6559 }
6560 if (idx == 64)
6561 return -1;
6562
6563 wpa_printf(MSG_DEBUG, "nl80211: Assigned new P2P Interface Address "
6564 MACSTR, MAC2STR(new_addr));
6565
6566 return 0;
6567 }
6568
6569 #endif /* CONFIG_P2P */
6570
6571
6572 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
6573 const char *ifname, const u8 *addr,
6574 void *bss_ctx, void **drv_priv,
6575 char *force_ifname, u8 *if_addr,
6576 const char *bridge)
6577 {
6578 struct i802_bss *bss = priv;
6579 struct wpa_driver_nl80211_data *drv = bss->drv;
6580 int ifidx;
6581 #ifdef HOSTAPD
6582 struct i802_bss *new_bss = NULL;
6583
6584 if (type == WPA_IF_AP_BSS) {
6585 new_bss = os_zalloc(sizeof(*new_bss));
6586 if (new_bss == NULL)
6587 return -1;
6588 }
6589 #endif /* HOSTAPD */
6590
6591 if (addr)
6592 os_memcpy(if_addr, addr, ETH_ALEN);
6593 ifidx = nl80211_create_iface(drv, ifname,
6594 wpa_driver_nl80211_if_type(type), addr,
6595 0);
6596 if (ifidx < 0) {
6597 #ifdef HOSTAPD
6598 os_free(new_bss);
6599 #endif /* HOSTAPD */
6600 return -1;
6601 }
6602
6603 if (!addr &&
6604 linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0) {
6605 nl80211_remove_iface(drv, ifidx);
6606 return -1;
6607 }
6608
6609 #ifdef CONFIG_P2P
6610 if (!addr &&
6611 (type == WPA_IF_P2P_CLIENT || type == WPA_IF_P2P_GROUP ||
6612 type == WPA_IF_P2P_GO)) {
6613 /* Enforce unique P2P Interface Address */
6614 u8 new_addr[ETH_ALEN], own_addr[ETH_ALEN];
6615
6616 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr)
6617 < 0 ||
6618 linux_get_ifhwaddr(drv->ioctl_sock, ifname, new_addr) < 0)
6619 {
6620 nl80211_remove_iface(drv, ifidx);
6621 return -1;
6622 }
6623 if (os_memcmp(own_addr, new_addr, ETH_ALEN) == 0) {
6624 wpa_printf(MSG_DEBUG, "nl80211: Allocate new address "
6625 "for P2P group interface");
6626 if (nl80211_p2p_interface_addr(drv, new_addr) < 0) {
6627 nl80211_remove_iface(drv, ifidx);
6628 return -1;
6629 }
6630 if (linux_set_ifhwaddr(drv->ioctl_sock, ifname,
6631 new_addr) < 0) {
6632 nl80211_remove_iface(drv, ifidx);
6633 return -1;
6634 }
6635 }
6636 os_memcpy(if_addr, new_addr, ETH_ALEN);
6637 }
6638 #endif /* CONFIG_P2P */
6639
6640 #ifdef HOSTAPD
6641 if (bridge &&
6642 i802_check_bridge(drv, new_bss, bridge, ifname) < 0) {
6643 wpa_printf(MSG_ERROR, "nl80211: Failed to add the new "
6644 "interface %s to a bridge %s", ifname, bridge);
6645 nl80211_remove_iface(drv, ifidx);
6646 os_free(new_bss);
6647 return -1;
6648 }
6649
6650 if (type == WPA_IF_AP_BSS) {
6651 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
6652 nl80211_remove_iface(drv, ifidx);
6653 os_free(new_bss);
6654 return -1;
6655 }
6656 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
6657 new_bss->ifindex = ifidx;
6658 new_bss->drv = drv;
6659 new_bss->next = drv->first_bss.next;
6660 drv->first_bss.next = new_bss;
6661 if (drv_priv)
6662 *drv_priv = new_bss;
6663 }
6664 #endif /* HOSTAPD */
6665
6666 if (drv->global)
6667 drv->global->if_add_ifindex = ifidx;
6668
6669 return 0;
6670 }
6671
6672
6673 static int wpa_driver_nl80211_if_remove(void *priv,
6674 enum wpa_driver_if_type type,
6675 const char *ifname)
6676 {
6677 struct i802_bss *bss = priv;
6678 struct wpa_driver_nl80211_data *drv = bss->drv;
6679 int ifindex = if_nametoindex(ifname);
6680
6681 wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
6682 __func__, type, ifname, ifindex);
6683 if (ifindex <= 0)
6684 return -1;
6685
6686 #ifdef HOSTAPD
6687 if (bss->added_if_into_bridge) {
6688 if (linux_br_del_if(drv->ioctl_sock, bss->brname, bss->ifname)
6689 < 0)
6690 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
6691 "interface %s from bridge %s: %s",
6692 bss->ifname, bss->brname, strerror(errno));
6693 }
6694 if (bss->added_bridge) {
6695 if (linux_br_del(drv->ioctl_sock, bss->brname) < 0)
6696 wpa_printf(MSG_INFO, "nl80211: Failed to remove "
6697 "bridge %s: %s",
6698 bss->brname, strerror(errno));
6699 }
6700 #endif /* HOSTAPD */
6701
6702 nl80211_remove_iface(drv, ifindex);
6703
6704 #ifdef HOSTAPD
6705 if (type != WPA_IF_AP_BSS)
6706 return 0;
6707
6708 if (bss != &drv->first_bss) {
6709 struct i802_bss *tbss;
6710
6711 for (tbss = &drv->first_bss; tbss; tbss = tbss->next) {
6712 if (tbss->next == bss) {
6713 tbss->next = bss->next;
6714 os_free(bss);
6715 bss = NULL;
6716 break;
6717 }
6718 }
6719 if (bss)
6720 wpa_printf(MSG_INFO, "nl80211: %s - could not find "
6721 "BSS %p in the list", __func__, bss);
6722 }
6723 #endif /* HOSTAPD */
6724
6725 return 0;
6726 }
6727
6728
6729 static int cookie_handler(struct nl_msg *msg, void *arg)
6730 {
6731 struct nlattr *tb[NL80211_ATTR_MAX + 1];
6732 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
6733 u64 *cookie = arg;
6734 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
6735 genlmsg_attrlen(gnlh, 0), NULL);
6736 if (tb[NL80211_ATTR_COOKIE])
6737 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
6738 return NL_SKIP;
6739 }
6740
6741
6742 static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
6743 unsigned int freq, unsigned int wait,
6744 const u8 *buf, size_t buf_len,
6745 u64 *cookie_out)
6746 {
6747 struct nl_msg *msg;
6748 u64 cookie;
6749 int ret = -1;
6750
6751 msg = nlmsg_alloc();
6752 if (!msg)
6753 return -1;
6754
6755 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
6756 NL80211_CMD_FRAME, 0);
6757
6758 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6759 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6760 if (wait)
6761 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, wait);
6762 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
6763 NLA_PUT(msg, NL80211_ATTR_FRAME, buf_len, buf);
6764
6765 cookie = 0;
6766 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
6767 msg = NULL;
6768 if (ret) {
6769 wpa_printf(MSG_DEBUG, "nl80211: Frame command failed: ret=%d "
6770 "(%s) (freq=%u wait=%u)", ret, strerror(-ret),
6771 freq, wait);
6772 goto nla_put_failure;
6773 }
6774 wpa_printf(MSG_DEBUG, "nl80211: Frame TX command accepted; "
6775 "cookie 0x%llx", (long long unsigned int) cookie);
6776
6777 if (cookie_out)
6778 *cookie_out = cookie;
6779
6780 nla_put_failure:
6781 nlmsg_free(msg);
6782 return ret;
6783 }
6784
6785
6786 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
6787 unsigned int wait_time,
6788 const u8 *dst, const u8 *src,
6789 const u8 *bssid,
6790 const u8 *data, size_t data_len)
6791 {
6792 struct i802_bss *bss = priv;
6793 struct wpa_driver_nl80211_data *drv = bss->drv;
6794 int ret = -1;
6795 u8 *buf;
6796 struct ieee80211_hdr *hdr;
6797
6798 wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d, "
6799 "wait=%d ms)", drv->ifindex, wait_time);
6800
6801 buf = os_zalloc(24 + data_len);
6802 if (buf == NULL)
6803 return ret;
6804 os_memcpy(buf + 24, data, data_len);
6805 hdr = (struct ieee80211_hdr *) buf;
6806 hdr->frame_control =
6807 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
6808 os_memcpy(hdr->addr1, dst, ETH_ALEN);
6809 os_memcpy(hdr->addr2, src, ETH_ALEN);
6810 os_memcpy(hdr->addr3, bssid, ETH_ALEN);
6811
6812 if (is_ap_interface(drv->nlmode))
6813 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
6814 else
6815 ret = nl80211_send_frame_cmd(drv, freq, wait_time, buf,
6816 24 + data_len,
6817 &drv->send_action_cookie);
6818
6819 os_free(buf);
6820 return ret;
6821 }
6822
6823
6824 static void wpa_driver_nl80211_send_action_cancel_wait(void *priv)
6825 {
6826 struct i802_bss *bss = priv;
6827 struct wpa_driver_nl80211_data *drv = bss->drv;
6828 struct nl_msg *msg;
6829 int ret;
6830
6831 msg = nlmsg_alloc();
6832 if (!msg)
6833 return;
6834
6835 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
6836 NL80211_CMD_FRAME_WAIT_CANCEL, 0);
6837
6838 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6839 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->send_action_cookie);
6840
6841 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6842 msg = NULL;
6843 if (ret)
6844 wpa_printf(MSG_DEBUG, "nl80211: wait cancel failed: ret=%d "
6845 "(%s)", ret, strerror(-ret));
6846
6847 nla_put_failure:
6848 nlmsg_free(msg);
6849 }
6850
6851
6852 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
6853 unsigned int duration)
6854 {
6855 struct i802_bss *bss = priv;
6856 struct wpa_driver_nl80211_data *drv = bss->drv;
6857 struct nl_msg *msg;
6858 int ret;
6859 u64 cookie;
6860
6861 msg = nlmsg_alloc();
6862 if (!msg)
6863 return -1;
6864
6865 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
6866 NL80211_CMD_REMAIN_ON_CHANNEL, 0);
6867
6868 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6869 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6870 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6871
6872 cookie = 0;
6873 ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
6874 if (ret == 0) {
6875 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
6876 "0x%llx for freq=%u MHz duration=%u",
6877 (long long unsigned int) cookie, freq, duration);
6878 drv->remain_on_chan_cookie = cookie;
6879 drv->pending_remain_on_chan = 1;
6880 return 0;
6881 }
6882 wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
6883 "(freq=%d duration=%u): %d (%s)",
6884 freq, duration, ret, strerror(-ret));
6885 nla_put_failure:
6886 return -1;
6887 }
6888
6889
6890 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
6891 {
6892 struct i802_bss *bss = priv;
6893 struct wpa_driver_nl80211_data *drv = bss->drv;
6894 struct nl_msg *msg;
6895 int ret;
6896
6897 if (!drv->pending_remain_on_chan) {
6898 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
6899 "to cancel");
6900 return -1;
6901 }
6902
6903 wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
6904 "0x%llx",
6905 (long long unsigned int) drv->remain_on_chan_cookie);
6906
6907 msg = nlmsg_alloc();
6908 if (!msg)
6909 return -1;
6910
6911 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
6912 NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
6913
6914 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
6915 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
6916
6917 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6918 if (ret == 0)
6919 return 0;
6920 wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
6921 "%d (%s)", ret, strerror(-ret));
6922 nla_put_failure:
6923 return -1;
6924 }
6925
6926
6927 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
6928 {
6929 struct i802_bss *bss = priv;
6930 struct wpa_driver_nl80211_data *drv = bss->drv;
6931
6932 if (!report) {
6933 if (drv->nl_handle_preq) {
6934 eloop_unregister_read_sock(
6935 nl_socket_get_fd(drv->nl_handle_preq));
6936 nl_cache_free(drv->nl_cache_preq);
6937 nl80211_handle_destroy(drv->nl_handle_preq);
6938 drv->nl_handle_preq = NULL;
6939 }
6940 return 0;
6941 }
6942
6943 if (drv->nl_handle_preq) {
6944 wpa_printf(MSG_DEBUG, "nl80211: Probe Request reporting "
6945 "already on!");
6946 return 0;
6947 }
6948
6949 drv->nl_handle_preq = nl80211_handle_alloc(drv->nl_cb);
6950 if (drv->nl_handle_preq == NULL) {
6951 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate "
6952 "netlink callbacks (preq)");
6953 goto out_err1;
6954 }
6955
6956 if (genl_connect(drv->nl_handle_preq)) {
6957 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to "
6958 "generic netlink (preq)");
6959 goto out_err2;
6960 return -1;
6961 }
6962
6963 #ifdef CONFIG_LIBNL20
6964 if (genl_ctrl_alloc_cache(drv->nl_handle_preq,
6965 &drv->nl_cache_preq) < 0) {
6966 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
6967 "netlink cache (preq)");
6968 goto out_err2;
6969 }
6970 #else /* CONFIG_LIBNL20 */
6971 drv->nl_cache_preq = genl_ctrl_alloc_cache(drv->nl_handle_preq);
6972 if (drv->nl_cache_preq == NULL) {
6973 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
6974 "netlink cache (preq)");
6975 goto out_err2;
6976 }
6977 #endif /* CONFIG_LIBNL20 */
6978
6979 if (nl80211_register_frame(drv, drv->nl_handle_preq,
6980 (WLAN_FC_TYPE_MGMT << 2) |
6981 (WLAN_FC_STYPE_PROBE_REQ << 4),
6982 NULL, 0) < 0) {
6983 goto out_err3;
6984 }
6985
6986 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_preq),
6987 wpa_driver_nl80211_event_receive, drv,
6988 drv->nl_handle_preq);
6989
6990 return 0;
6991
6992 out_err3:
6993 nl_cache_free(drv->nl_cache_preq);
6994 out_err2:
6995 nl80211_handle_destroy(drv->nl_handle_preq);
6996 drv->nl_handle_preq = NULL;
6997 out_err1:
6998 return -1;
6999 }
7000
7001
7002 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
7003 int ifindex, int disabled)
7004 {
7005 struct nl_msg *msg;
7006 struct nlattr *bands, *band;
7007 int ret;
7008
7009 msg = nlmsg_alloc();
7010 if (!msg)
7011 return -1;
7012
7013 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
7014 NL80211_CMD_SET_TX_BITRATE_MASK, 0);
7015 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
7016
7017 bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
7018 if (!bands)
7019 goto nla_put_failure;
7020
7021 /*
7022 * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
7023 * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
7024 * rates. All 5 GHz rates are left enabled.
7025 */
7026 band = nla_nest_start(msg, NL80211_BAND_2GHZ);
7027 if (!band)
7028 goto nla_put_failure;
7029 NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
7030 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
7031 nla_nest_end(msg, band);
7032
7033 nla_nest_end(msg, bands);
7034
7035 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
7036 msg = NULL;
7037 if (ret) {
7038 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
7039 "(%s)", ret, strerror(-ret));
7040 }
7041
7042 return ret;
7043
7044 nla_put_failure:
7045 nlmsg_free(msg);
7046 return -1;
7047 }
7048
7049
7050 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
7051 {
7052 struct i802_bss *bss = priv;
7053 struct wpa_driver_nl80211_data *drv = bss->drv;
7054 drv->disable_11b_rates = disabled;
7055 return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
7056 }
7057
7058
7059 static int wpa_driver_nl80211_deinit_ap(void *priv)
7060 {
7061 struct i802_bss *bss = priv;
7062 struct wpa_driver_nl80211_data *drv = bss->drv;
7063 if (!is_ap_interface(drv->nlmode))
7064 return -1;
7065 wpa_driver_nl80211_del_beacon(drv);
7066 return wpa_driver_nl80211_set_mode(priv, NL80211_IFTYPE_STATION);
7067 }
7068
7069
7070 static void wpa_driver_nl80211_resume(void *priv)
7071 {
7072 struct i802_bss *bss = priv;
7073 struct wpa_driver_nl80211_data *drv = bss->drv;
7074 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
7075 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
7076 "resume event");
7077 }
7078 }
7079
7080
7081 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
7082 const u8 *ies, size_t ies_len)
7083 {
7084 struct i802_bss *bss = priv;
7085 struct wpa_driver_nl80211_data *drv = bss->drv;
7086 int ret;
7087 u8 *data, *pos;
7088 size_t data_len;
7089 u8 own_addr[ETH_ALEN];
7090
7091 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
7092 return -1;
7093
7094 if (action != 1) {
7095 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
7096 "action %d", action);
7097 return -1;
7098 }
7099
7100 /*
7101 * Action frame payload:
7102 * Category[1] = 6 (Fast BSS Transition)
7103 * Action[1] = 1 (Fast BSS Transition Request)
7104 * STA Address
7105 * Target AP Address
7106 * FT IEs
7107 */
7108
7109 data_len = 2 + 2 * ETH_ALEN + ies_len;
7110 data = os_malloc(data_len);
7111 if (data == NULL)
7112 return -1;
7113 pos = data;
7114 *pos++ = 0x06; /* FT Action category */
7115 *pos++ = action;
7116 os_memcpy(pos, own_addr, ETH_ALEN);
7117 pos += ETH_ALEN;
7118 os_memcpy(pos, target_ap, ETH_ALEN);
7119 pos += ETH_ALEN;
7120 os_memcpy(pos, ies, ies_len);
7121
7122 ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, 0,
7123 drv->bssid, own_addr, drv->bssid,
7124 data, data_len);
7125 os_free(data);
7126
7127 return ret;
7128 }
7129
7130
7131 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
7132 {
7133 struct i802_bss *bss = priv;
7134 struct wpa_driver_nl80211_data *drv = bss->drv;
7135 struct nl_msg *msg, *cqm = NULL;
7136
7137 wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
7138 "hysteresis=%d", threshold, hysteresis);
7139
7140 msg = nlmsg_alloc();
7141 if (!msg)
7142 return -1;
7143
7144 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
7145 0, NL80211_CMD_SET_CQM, 0);
7146
7147 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
7148
7149 cqm = nlmsg_alloc();
7150 if (cqm == NULL)
7151 return -1;
7152
7153 NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
7154 NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
7155 nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
7156
7157 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
7158 return 0;
7159 msg = NULL;
7160
7161 nla_put_failure:
7162 if (cqm)
7163 nlmsg_free(cqm);
7164 nlmsg_free(msg);
7165 return -1;
7166 }
7167
7168
7169 static int nl80211_signal_poll(void *priv, struct wpa_signal_info *si)
7170 {
7171 struct i802_bss *bss = priv;
7172 struct wpa_driver_nl80211_data *drv = bss->drv;
7173 int res;
7174
7175 os_memset(si, 0, sizeof(*si));
7176 res = nl80211_get_link_signal(drv, si);
7177 if (res != 0)
7178 return res;
7179
7180 return nl80211_get_link_noise(drv, si);
7181 }
7182
7183
7184 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
7185 int encrypt)
7186 {
7187 struct i802_bss *bss = priv;
7188 struct wpa_driver_nl80211_data *drv = bss->drv;
7189 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
7190 }
7191
7192
7193 static int nl80211_set_intra_bss(void *priv, int enabled)
7194 {
7195 struct i802_bss *bss = priv;
7196 struct wpa_driver_nl80211_data *drv = bss->drv;
7197 struct nl_msg *msg;
7198
7199 msg = nlmsg_alloc();
7200 if (!msg)
7201 return -ENOMEM;
7202
7203 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
7204 NL80211_CMD_SET_BSS, 0);
7205
7206 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
7207 NLA_PUT_U8(msg, NL80211_ATTR_AP_ISOLATE, !enabled);
7208
7209 return send_and_recv_msgs(drv, msg, NULL, NULL);
7210 nla_put_failure:
7211 return -ENOBUFS;
7212 }
7213
7214
7215 static int nl80211_set_param(void *priv, const char *param)
7216 {
7217 wpa_printf(MSG_DEBUG, "nl80211: driver param='%s'", param);
7218 if (param == NULL)
7219 return 0;
7220
7221 #ifdef CONFIG_P2P
7222 if (os_strstr(param, "use_p2p_group_interface=1")) {
7223 struct i802_bss *bss = priv;
7224 struct wpa_driver_nl80211_data *drv = bss->drv;
7225
7226 wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
7227 "interface");
7228 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
7229 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
7230 }
7231 #endif /* CONFIG_P2P */
7232
7233 return 0;
7234 }
7235
7236
7237 static void * nl80211_global_init(void)
7238 {
7239 struct nl80211_global *global;
7240 global = os_zalloc(sizeof(*global));
7241 if (global == NULL)
7242 return NULL;
7243 dl_list_init(&global->interfaces);
7244 global->if_add_ifindex = -1;
7245 return global;
7246 }
7247
7248
7249 static void nl80211_global_deinit(void *priv)
7250 {
7251 struct nl80211_global *global = priv;
7252 if (global == NULL)
7253 return;
7254 if (!dl_list_empty(&global->interfaces)) {
7255 wpa_printf(MSG_ERROR, "nl80211: %u interface(s) remain at "
7256 "nl80211_global_deinit",
7257 dl_list_len(&global->interfaces));
7258 }
7259 os_free(global);
7260 }
7261
7262
7263 static const char * nl80211_get_radio_name(void *priv)
7264 {
7265 struct i802_bss *bss = priv;
7266 struct wpa_driver_nl80211_data *drv = bss->drv;
7267 return drv->phyname;
7268 }
7269
7270
7271 static int nl80211_pmkid(struct i802_bss *bss, int cmd, const u8 *bssid,
7272 const u8 *pmkid)
7273 {
7274 struct nl_msg *msg;
7275
7276 msg = nlmsg_alloc();
7277 if (!msg)
7278 return -ENOMEM;
7279
7280 genlmsg_put(msg, 0, 0, genl_family_get_id(bss->drv->nl80211), 0, 0,
7281 cmd, 0);
7282
7283 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
7284 if (pmkid)
7285 NLA_PUT(msg, NL80211_ATTR_PMKID, 16, pmkid);
7286 if (bssid)
7287 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7288
7289 return send_and_recv_msgs(bss->drv, msg, NULL, NULL);
7290 nla_put_failure:
7291 return -ENOBUFS;
7292 }
7293
7294
7295 static int nl80211_add_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
7296 {
7297 struct i802_bss *bss = priv;
7298 wpa_printf(MSG_DEBUG, "nl80211: Add PMKID for " MACSTR, MAC2STR(bssid));
7299 return nl80211_pmkid(bss, NL80211_CMD_SET_PMKSA, bssid, pmkid);
7300 }
7301
7302
7303 static int nl80211_remove_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
7304 {
7305 struct i802_bss *bss = priv;
7306 wpa_printf(MSG_DEBUG, "nl80211: Delete PMKID for " MACSTR,
7307 MAC2STR(bssid));
7308 return nl80211_pmkid(bss, NL80211_CMD_DEL_PMKSA, bssid, pmkid);
7309 }
7310
7311
7312 static int nl80211_flush_pmkid(void *priv)
7313 {
7314 struct i802_bss *bss = priv;
7315 wpa_printf(MSG_DEBUG, "nl80211: Flush PMKIDs");
7316 return nl80211_pmkid(bss, NL80211_CMD_FLUSH_PMKSA, NULL, NULL);
7317 }
7318
7319
7320 static void nl80211_set_rekey_info(void *priv, const u8 *kek, const u8 *kck,
7321 const u8 *replay_ctr)
7322 {
7323 struct i802_bss *bss = priv;
7324 struct wpa_driver_nl80211_data *drv = bss->drv;
7325 struct nlattr *replay_nested;
7326 struct nl_msg *msg;
7327
7328 msg = nlmsg_alloc();
7329 if (!msg)
7330 return;
7331
7332 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
7333 NL80211_CMD_SET_REKEY_OFFLOAD, 0);
7334
7335 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
7336
7337 replay_nested = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7338 if (!replay_nested)
7339 goto nla_put_failure;
7340
7341 NLA_PUT(msg, NL80211_REKEY_DATA_KEK, NL80211_KEK_LEN, kek);
7342 NLA_PUT(msg, NL80211_REKEY_DATA_KCK, NL80211_KCK_LEN, kck);
7343 NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR, NL80211_REPLAY_CTR_LEN,
7344 replay_ctr);
7345
7346 nla_nest_end(msg, replay_nested);
7347
7348 send_and_recv_msgs(drv, msg, NULL, NULL);
7349 return;
7350 nla_put_failure:
7351 nlmsg_free(msg);
7352 }
7353
7354
7355 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
7356 .name = "nl80211",
7357 .desc = "Linux nl80211/cfg80211",
7358 .get_bssid = wpa_driver_nl80211_get_bssid,
7359 .get_ssid = wpa_driver_nl80211_get_ssid,
7360 .set_key = wpa_driver_nl80211_set_key,
7361 .scan2 = wpa_driver_nl80211_scan,
7362 .sched_scan = wpa_driver_nl80211_sched_scan,
7363 .stop_sched_scan = wpa_driver_nl80211_stop_sched_scan,
7364 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
7365 .deauthenticate = wpa_driver_nl80211_deauthenticate,
7366 .disassociate = wpa_driver_nl80211_disassociate,
7367 .authenticate = wpa_driver_nl80211_authenticate,
7368 .associate = wpa_driver_nl80211_associate,
7369 .global_init = nl80211_global_init,
7370 .global_deinit = nl80211_global_deinit,
7371 .init2 = wpa_driver_nl80211_init,
7372 .deinit = wpa_driver_nl80211_deinit,
7373 .get_capa = wpa_driver_nl80211_get_capa,
7374 .set_operstate = wpa_driver_nl80211_set_operstate,
7375 .set_supp_port = wpa_driver_nl80211_set_supp_port,
7376 .set_country = wpa_driver_nl80211_set_country,
7377 .set_ap = wpa_driver_nl80211_set_ap,
7378 .if_add = wpa_driver_nl80211_if_add,
7379 .if_remove = wpa_driver_nl80211_if_remove,
7380 .send_mlme = wpa_driver_nl80211_send_mlme,
7381 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
7382 .sta_add = wpa_driver_nl80211_sta_add,
7383 .sta_remove = wpa_driver_nl80211_sta_remove,
7384 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
7385 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
7386 #ifdef HOSTAPD
7387 .hapd_init = i802_init,
7388 .hapd_deinit = i802_deinit,
7389 .set_wds_sta = i802_set_wds_sta,
7390 #endif /* HOSTAPD */
7391 #if defined(HOSTAPD) || defined(CONFIG_AP)
7392 .get_seqnum = i802_get_seqnum,
7393 .flush = i802_flush,
7394 .read_sta_data = i802_read_sta_data,
7395 .get_inact_sec = i802_get_inact_sec,
7396 .sta_clear_stats = i802_sta_clear_stats,
7397 .set_rts = i802_set_rts,
7398 .set_frag = i802_set_frag,
7399 .set_cts_protect = i802_set_cts_protect,
7400 .set_preamble = i802_set_preamble,
7401 .set_short_slot_time = i802_set_short_slot_time,
7402 .set_tx_queue_params = i802_set_tx_queue_params,
7403 .set_sta_vlan = i802_set_sta_vlan,
7404 .set_ht_params = i802_set_ht_params,
7405 .set_rate_sets = i802_set_rate_sets,
7406 .sta_deauth = i802_sta_deauth,
7407 .sta_disassoc = i802_sta_disassoc,
7408 #endif /* HOSTAPD || CONFIG_AP */
7409 .set_freq = i802_set_freq,
7410 .send_action = wpa_driver_nl80211_send_action,
7411 .send_action_cancel_wait = wpa_driver_nl80211_send_action_cancel_wait,
7412 .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
7413 .cancel_remain_on_channel =
7414 wpa_driver_nl80211_cancel_remain_on_channel,
7415 .probe_req_report = wpa_driver_nl80211_probe_req_report,
7416 .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
7417 .deinit_ap = wpa_driver_nl80211_deinit_ap,
7418 .resume = wpa_driver_nl80211_resume,
7419 .send_ft_action = nl80211_send_ft_action,
7420 .signal_monitor = nl80211_signal_monitor,
7421 .signal_poll = nl80211_signal_poll,
7422 .send_frame = nl80211_send_frame,
7423 .set_intra_bss = nl80211_set_intra_bss,
7424 .set_param = nl80211_set_param,
7425 .get_radio_name = nl80211_get_radio_name,
7426 .add_pmkid = nl80211_add_pmkid,
7427 .remove_pmkid = nl80211_remove_pmkid,
7428 .flush_pmkid = nl80211_flush_pmkid,
7429 .set_rekey_info = nl80211_set_rekey_info,
7430 };
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