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nl80211/wext: Share netlink new/del link event receive code
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <net/if_arp.h>
22 #include <net/if.h>
23 #include <netlink/genl/genl.h>
24 #include <netlink/genl/family.h>
25 #include <netlink/genl/ctrl.h>
26 #include <netpacket/packet.h>
27 #include <linux/filter.h>
28 #include "nl80211_copy.h"
29
30 #include "common.h"
31 #include "eloop.h"
32 #include "common/ieee802_11_defs.h"
33 #include "netlink.h"
34 #include "radiotap.h"
35 #include "radiotap_iter.h"
36 #include "driver.h"
37
38 #ifdef CONFIG_LIBNL20
39 /* libnl 2.0 compatibility code */
40 #define nl_handle nl_sock
41 #define nl_handle_alloc_cb nl_socket_alloc_cb
42 #define nl_handle_destroy nl_socket_free
43 #endif /* CONFIG_LIBNL20 */
44
45
46 #ifndef IFF_LOWER_UP
47 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
48 #endif
49 #ifndef IFF_DORMANT
50 #define IFF_DORMANT 0x20000 /* driver signals dormant */
51 #endif
52
53 #ifndef IF_OPER_DORMANT
54 #define IF_OPER_DORMANT 5
55 #endif
56 #ifndef IF_OPER_UP
57 #define IF_OPER_UP 6
58 #endif
59
60 struct i802_bss {
61 struct i802_bss *next;
62 int ifindex;
63 unsigned int beacon_set:1;
64 };
65
66 struct wpa_driver_nl80211_data {
67 void *ctx;
68 struct netlink_data *netlink;
69 int ioctl_sock; /* socket for ioctl() use */
70 char ifname[IFNAMSIZ + 1];
71 int ifindex;
72 int if_removed;
73 struct wpa_driver_capa capa;
74 int has_capability;
75
76 int operstate;
77
78 int scan_complete_events;
79
80 struct nl_handle *nl_handle;
81 struct nl_handle *nl_handle_event;
82 struct nl_cache *nl_cache;
83 struct nl_cache *nl_cache_event;
84 struct nl_cb *nl_cb;
85 struct genl_family *nl80211;
86
87 u8 auth_bssid[ETH_ALEN];
88 u8 bssid[ETH_ALEN];
89 int associated;
90 u8 ssid[32];
91 size_t ssid_len;
92 int nlmode;
93 int ap_scan_as_station;
94
95 int monitor_sock;
96 int monitor_ifidx;
97
98 unsigned int beacon_set:1;
99
100 #ifdef HOSTAPD
101 int eapol_sock; /* socket for EAPOL frames */
102
103 int default_if_indices[16];
104 int *if_indices;
105 int num_if_indices;
106
107 struct i802_bss bss;
108
109 int last_freq;
110 int last_freq_ht;
111 #endif /* HOSTAPD */
112 };
113
114
115 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
116 void *timeout_ctx);
117 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
118 static int
119 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
120 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
121 const u8 *addr, int cmd, u16 reason_code);
122 static void nl80211_remove_monitor_interface(
123 struct wpa_driver_nl80211_data *drv);
124
125 #ifdef HOSTAPD
126 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
127 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
128 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
129 int ifindex);
130 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
131 #endif /* HOSTAPD */
132
133
134 /* nl80211 code */
135 static int ack_handler(struct nl_msg *msg, void *arg)
136 {
137 int *err = arg;
138 *err = 0;
139 return NL_STOP;
140 }
141
142 static int finish_handler(struct nl_msg *msg, void *arg)
143 {
144 int *ret = arg;
145 *ret = 0;
146 return NL_SKIP;
147 }
148
149 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
150 void *arg)
151 {
152 int *ret = arg;
153 *ret = err->error;
154 return NL_SKIP;
155 }
156
157
158 static int no_seq_check(struct nl_msg *msg, void *arg)
159 {
160 return NL_OK;
161 }
162
163
164 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
165 struct nl_msg *msg,
166 int (*valid_handler)(struct nl_msg *, void *),
167 void *valid_data)
168 {
169 struct nl_cb *cb;
170 int err = -ENOMEM;
171
172 cb = nl_cb_clone(drv->nl_cb);
173 if (!cb)
174 goto out;
175
176 err = nl_send_auto_complete(drv->nl_handle, msg);
177 if (err < 0)
178 goto out;
179
180 err = 1;
181
182 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
183 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
184 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
185
186 if (valid_handler)
187 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
188 valid_handler, valid_data);
189
190 while (err > 0)
191 nl_recvmsgs(drv->nl_handle, cb);
192 out:
193 nl_cb_put(cb);
194 nlmsg_free(msg);
195 return err;
196 }
197
198
199 struct family_data {
200 const char *group;
201 int id;
202 };
203
204
205 static int family_handler(struct nl_msg *msg, void *arg)
206 {
207 struct family_data *res = arg;
208 struct nlattr *tb[CTRL_ATTR_MAX + 1];
209 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
210 struct nlattr *mcgrp;
211 int i;
212
213 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
214 genlmsg_attrlen(gnlh, 0), NULL);
215 if (!tb[CTRL_ATTR_MCAST_GROUPS])
216 return NL_SKIP;
217
218 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
219 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
220 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
221 nla_len(mcgrp), NULL);
222 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
223 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
224 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
225 res->group,
226 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
227 continue;
228 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
229 break;
230 };
231
232 return NL_SKIP;
233 }
234
235
236 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
237 const char *family, const char *group)
238 {
239 struct nl_msg *msg;
240 int ret = -1;
241 struct family_data res = { group, -ENOENT };
242
243 msg = nlmsg_alloc();
244 if (!msg)
245 return -ENOMEM;
246 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
247 0, 0, CTRL_CMD_GETFAMILY, 0);
248 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
249
250 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
251 msg = NULL;
252 if (ret == 0)
253 ret = res.id;
254
255 nla_put_failure:
256 nlmsg_free(msg);
257 return ret;
258 }
259
260
261 #ifdef HOSTAPD
262 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
263 const char *ifname, u8 *addr)
264 {
265 struct ifreq ifr;
266
267 os_memset(&ifr, 0, sizeof(ifr));
268 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
269 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
270 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
271 ifname, errno, strerror(errno));
272 return -1;
273 }
274
275 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
276 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
277 ifname, ifr.ifr_hwaddr.sa_family);
278 return -1;
279 }
280 os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
281
282 return 0;
283 }
284
285
286 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
287 const char *ifname, const u8 *addr)
288 {
289 struct ifreq ifr;
290
291 os_memset(&ifr, 0, sizeof(ifr));
292 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
293 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
294 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
295
296 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
297 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
298 ifname, errno, strerror(errno));
299 return -1;
300 }
301
302 return 0;
303 }
304 #endif /* HOSTAPD */
305
306
307 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
308 {
309 struct wpa_driver_nl80211_data *drv = priv;
310 if (!drv->associated)
311 return -1;
312 os_memcpy(bssid, drv->bssid, ETH_ALEN);
313 return 0;
314 }
315
316
317 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
318 {
319 struct wpa_driver_nl80211_data *drv = priv;
320 if (!drv->associated)
321 return -1;
322 os_memcpy(ssid, drv->ssid, drv->ssid_len);
323 return drv->ssid_len;
324 }
325
326
327 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
328 char *buf, size_t len, int del)
329 {
330 union wpa_event_data event;
331
332 os_memset(&event, 0, sizeof(event));
333 if (len > sizeof(event.interface_status.ifname))
334 len = sizeof(event.interface_status.ifname) - 1;
335 os_memcpy(event.interface_status.ifname, buf, len);
336 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
337 EVENT_INTERFACE_ADDED;
338
339 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
340 del ? "DEL" : "NEW",
341 event.interface_status.ifname,
342 del ? "removed" : "added");
343
344 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
345 if (del)
346 drv->if_removed = 1;
347 else
348 drv->if_removed = 0;
349 }
350
351 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
352 }
353
354
355 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
356 struct nlmsghdr *h)
357 {
358 struct ifinfomsg *ifi;
359 int attrlen, _nlmsg_len, rta_len;
360 struct rtattr *attr;
361
362 ifi = NLMSG_DATA(h);
363
364 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
365
366 attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
367 if (attrlen < 0)
368 return 0;
369
370 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
371
372 rta_len = RTA_ALIGN(sizeof(struct rtattr));
373 while (RTA_OK(attr, attrlen)) {
374 if (attr->rta_type == IFLA_IFNAME) {
375 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
376 == 0)
377 return 1;
378 else
379 break;
380 }
381 attr = RTA_NEXT(attr, attrlen);
382 }
383
384 return 0;
385 }
386
387
388 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
389 int ifindex, struct nlmsghdr *h)
390 {
391 if (drv->ifindex == ifindex)
392 return 1;
393
394 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
395 drv->ifindex = if_nametoindex(drv->ifname);
396 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
397 "interface");
398 wpa_driver_nl80211_finish_drv_init(drv);
399 return 1;
400 }
401
402 return 0;
403 }
404
405
406 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx, struct nlmsghdr *h,
407 size_t len)
408 {
409 struct wpa_driver_nl80211_data *drv = ctx;
410 struct ifinfomsg *ifi;
411 int attrlen, _nlmsg_len, rta_len;
412 struct rtattr * attr;
413
414 if (len < sizeof(*ifi))
415 return;
416
417 ifi = NLMSG_DATA(h);
418
419 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
420 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
421 ifi->ifi_index);
422 return;
423 }
424
425 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
426 "(%s%s%s%s)",
427 drv->operstate, ifi->ifi_flags,
428 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
429 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
430 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
431 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
432 /*
433 * Some drivers send the association event before the operup event--in
434 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
435 * fails. This will hit us when wpa_supplicant does not need to do
436 * IEEE 802.1X authentication
437 */
438 if (drv->operstate == 1 &&
439 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
440 !(ifi->ifi_flags & IFF_RUNNING))
441 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
442 -1, IF_OPER_UP);
443
444 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
445
446 attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
447 if (attrlen < 0)
448 return;
449
450 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
451
452 rta_len = RTA_ALIGN(sizeof(struct rtattr));
453 while (RTA_OK(attr, attrlen)) {
454 if (attr->rta_type == IFLA_IFNAME) {
455 wpa_driver_nl80211_event_link(
456 drv,
457 ((char *) attr) + rta_len,
458 attr->rta_len - rta_len, 0);
459 }
460 attr = RTA_NEXT(attr, attrlen);
461 }
462 }
463
464
465 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx, struct nlmsghdr *h,
466 size_t len)
467 {
468 struct wpa_driver_nl80211_data *drv = ctx;
469 struct ifinfomsg *ifi;
470 int attrlen, _nlmsg_len, rta_len;
471 struct rtattr * attr;
472
473 if (len < sizeof(*ifi))
474 return;
475
476 ifi = NLMSG_DATA(h);
477
478 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
479
480 attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
481 if (attrlen < 0)
482 return;
483
484 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
485
486 rta_len = RTA_ALIGN(sizeof(struct rtattr));
487 while (RTA_OK(attr, attrlen)) {
488 if (attr->rta_type == IFLA_IFNAME) {
489 wpa_driver_nl80211_event_link(
490 drv,
491 ((char *) attr) + rta_len,
492 attr->rta_len - rta_len, 1);
493 }
494 attr = RTA_NEXT(attr, attrlen);
495 }
496 }
497
498
499 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
500 const u8 *frame, size_t len)
501 {
502 const struct ieee80211_mgmt *mgmt;
503 union wpa_event_data event;
504
505 mgmt = (const struct ieee80211_mgmt *) frame;
506 if (len < 24 + sizeof(mgmt->u.auth)) {
507 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
508 "frame");
509 return;
510 }
511
512 os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
513 os_memset(&event, 0, sizeof(event));
514 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
515 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
516 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
517 if (len > 24 + sizeof(mgmt->u.auth)) {
518 event.auth.ies = mgmt->u.auth.variable;
519 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
520 }
521
522 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
523 }
524
525
526 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
527 const u8 *frame, size_t len)
528 {
529 const struct ieee80211_mgmt *mgmt;
530 union wpa_event_data event;
531 u16 status;
532
533 mgmt = (const struct ieee80211_mgmt *) frame;
534 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
535 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
536 "frame");
537 return;
538 }
539
540 status = le_to_host16(mgmt->u.assoc_resp.status_code);
541 if (status != WLAN_STATUS_SUCCESS) {
542 os_memset(&event, 0, sizeof(event));
543 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
544 event.assoc_reject.resp_ies =
545 (u8 *) mgmt->u.assoc_resp.variable;
546 event.assoc_reject.resp_ies_len =
547 len - 24 - sizeof(mgmt->u.assoc_resp);
548 }
549 event.assoc_reject.status_code = status;
550
551 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
552 return;
553 }
554
555 drv->associated = 1;
556 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
557
558 os_memset(&event, 0, sizeof(event));
559 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
560 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
561 event.assoc_info.resp_ies_len =
562 len - 24 - sizeof(mgmt->u.assoc_resp);
563 }
564
565 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
566 }
567
568
569 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
570 enum nl80211_commands cmd, struct nlattr *status,
571 struct nlattr *addr, struct nlattr *req_ie,
572 struct nlattr *resp_ie)
573 {
574 union wpa_event_data event;
575
576 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
577 /*
578 * Avoid reporting two association events that would confuse
579 * the core code.
580 */
581 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
582 "when using userspace SME", cmd);
583 return;
584 }
585
586 os_memset(&event, 0, sizeof(event));
587 if (cmd == NL80211_CMD_CONNECT &&
588 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
589 if (resp_ie) {
590 event.assoc_reject.resp_ies = nla_data(resp_ie);
591 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
592 }
593 event.assoc_reject.status_code = nla_get_u16(status);
594 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
595 return;
596 }
597
598 drv->associated = 1;
599 if (addr)
600 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
601
602 if (req_ie) {
603 event.assoc_info.req_ies = nla_data(req_ie);
604 event.assoc_info.req_ies_len = nla_len(req_ie);
605 }
606 if (resp_ie) {
607 event.assoc_info.resp_ies = nla_data(resp_ie);
608 event.assoc_info.resp_ies_len = nla_len(resp_ie);
609 }
610
611 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
612 }
613
614
615 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
616 enum nl80211_commands cmd, struct nlattr *addr)
617 {
618 union wpa_event_data event;
619 enum wpa_event_type ev;
620
621 if (nla_len(addr) != ETH_ALEN)
622 return;
623
624 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
625 cmd, MAC2STR((u8 *) nla_data(addr)));
626
627 if (cmd == NL80211_CMD_AUTHENTICATE)
628 ev = EVENT_AUTH_TIMED_OUT;
629 else if (cmd == NL80211_CMD_ASSOCIATE)
630 ev = EVENT_ASSOC_TIMED_OUT;
631 else
632 return;
633
634 os_memset(&event, 0, sizeof(event));
635 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
636 wpa_supplicant_event(drv->ctx, ev, &event);
637 }
638
639
640 static void mlme_event(struct wpa_driver_nl80211_data *drv,
641 enum nl80211_commands cmd, struct nlattr *frame,
642 struct nlattr *addr, struct nlattr *timed_out)
643 {
644 if (timed_out && addr) {
645 mlme_timeout_event(drv, cmd, addr);
646 return;
647 }
648
649 if (frame == NULL) {
650 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
651 "data", cmd);
652 return;
653 }
654
655 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
656 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
657 nla_data(frame), nla_len(frame));
658
659 switch (cmd) {
660 case NL80211_CMD_AUTHENTICATE:
661 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
662 break;
663 case NL80211_CMD_ASSOCIATE:
664 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
665 break;
666 case NL80211_CMD_DEAUTHENTICATE:
667 drv->associated = 0;
668 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
669 break;
670 case NL80211_CMD_DISASSOCIATE:
671 drv->associated = 0;
672 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
673 break;
674 default:
675 break;
676 }
677 }
678
679
680 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
681 struct nlattr *tb[])
682 {
683 union wpa_event_data data;
684
685 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
686 os_memset(&data, 0, sizeof(data));
687 if (tb[NL80211_ATTR_MAC]) {
688 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
689 nla_data(tb[NL80211_ATTR_MAC]),
690 nla_len(tb[NL80211_ATTR_MAC]));
691 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
692 }
693 if (tb[NL80211_ATTR_KEY_SEQ]) {
694 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
695 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
696 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
697 }
698 if (tb[NL80211_ATTR_KEY_TYPE]) {
699 enum nl80211_key_type key_type =
700 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
701 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
702 if (key_type == NL80211_KEYTYPE_PAIRWISE)
703 data.michael_mic_failure.unicast = 1;
704 } else
705 data.michael_mic_failure.unicast = 1;
706
707 if (tb[NL80211_ATTR_KEY_IDX]) {
708 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
709 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
710 }
711
712 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
713 }
714
715
716 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
717 struct nlattr *tb[])
718 {
719 if (tb[NL80211_ATTR_MAC] == NULL) {
720 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
721 "event");
722 return;
723 }
724 os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
725 drv->associated = 1;
726 wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
727 MAC2STR(drv->bssid));
728
729 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
730 }
731
732
733 static int process_event(struct nl_msg *msg, void *arg)
734 {
735 struct wpa_driver_nl80211_data *drv = arg;
736 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
737 struct nlattr *tb[NL80211_ATTR_MAX + 1];
738
739 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
740 genlmsg_attrlen(gnlh, 0), NULL);
741
742 if (tb[NL80211_ATTR_IFINDEX]) {
743 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
744 if (ifindex != drv->ifindex) {
745 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
746 " for foreign interface (ifindex %d)",
747 gnlh->cmd, ifindex);
748 return NL_SKIP;
749 }
750 }
751
752 if (drv->ap_scan_as_station &&
753 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
754 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
755 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
756 drv->ap_scan_as_station = 0;
757 }
758
759 switch (gnlh->cmd) {
760 case NL80211_CMD_TRIGGER_SCAN:
761 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
762 break;
763 case NL80211_CMD_NEW_SCAN_RESULTS:
764 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
765 drv->scan_complete_events = 1;
766 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
767 drv->ctx);
768 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
769 break;
770 case NL80211_CMD_SCAN_ABORTED:
771 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
772 /*
773 * Need to indicate that scan results are available in order
774 * not to make wpa_supplicant stop its scanning.
775 */
776 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
777 drv->ctx);
778 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
779 break;
780 case NL80211_CMD_AUTHENTICATE:
781 case NL80211_CMD_ASSOCIATE:
782 case NL80211_CMD_DEAUTHENTICATE:
783 case NL80211_CMD_DISASSOCIATE:
784 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
785 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
786 break;
787 case NL80211_CMD_CONNECT:
788 case NL80211_CMD_ROAM:
789 mlme_event_connect(drv, gnlh->cmd,
790 tb[NL80211_ATTR_STATUS_CODE],
791 tb[NL80211_ATTR_MAC],
792 tb[NL80211_ATTR_REQ_IE],
793 tb[NL80211_ATTR_RESP_IE]);
794 break;
795 case NL80211_CMD_DISCONNECT:
796 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
797 /*
798 * Avoid reporting two disassociation events that could
799 * confuse the core code.
800 */
801 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
802 "event when using userspace SME");
803 break;
804 }
805 drv->associated = 0;
806 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
807 break;
808 case NL80211_CMD_MICHAEL_MIC_FAILURE:
809 mlme_event_michael_mic_failure(drv, tb);
810 break;
811 case NL80211_CMD_JOIN_IBSS:
812 mlme_event_join_ibss(drv, tb);
813 break;
814 default:
815 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
816 "(cmd=%d)", gnlh->cmd);
817 break;
818 }
819
820 return NL_SKIP;
821 }
822
823
824 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
825 void *sock_ctx)
826 {
827 struct nl_cb *cb;
828 struct wpa_driver_nl80211_data *drv = eloop_ctx;
829
830 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
831
832 cb = nl_cb_clone(drv->nl_cb);
833 if (!cb)
834 return;
835 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
836 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
837 nl_recvmsgs(drv->nl_handle_event, cb);
838 nl_cb_put(cb);
839 }
840
841
842 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
843 const char *ifname, int dev_up)
844 {
845 struct ifreq ifr;
846
847 if (drv->ioctl_sock < 0)
848 return -1;
849
850 os_memset(&ifr, 0, sizeof(ifr));
851 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
852
853 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
854 perror("ioctl[SIOCGIFFLAGS]");
855 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
856 ifname);
857 return -1;
858 }
859
860 if (dev_up) {
861 if (ifr.ifr_flags & IFF_UP)
862 return 0;
863 ifr.ifr_flags |= IFF_UP;
864 } else {
865 if (!(ifr.ifr_flags & IFF_UP))
866 return 0;
867 ifr.ifr_flags &= ~IFF_UP;
868 }
869
870 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
871 perror("ioctl[SIOCSIFFLAGS]");
872 return -1;
873 }
874
875 return 0;
876 }
877
878
879 /**
880 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
881 * @priv: driver_nl80211 private data
882 * @alpha2_arg: country to which to switch to
883 * Returns: 0 on success, -1 on failure
884 *
885 * This asks nl80211 to set the regulatory domain for given
886 * country ISO / IEC alpha2.
887 */
888 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
889 {
890 struct wpa_driver_nl80211_data *drv = priv;
891 char alpha2[3];
892 struct nl_msg *msg;
893
894 msg = nlmsg_alloc();
895 if (!msg)
896 return -ENOMEM;
897
898 alpha2[0] = alpha2_arg[0];
899 alpha2[1] = alpha2_arg[1];
900 alpha2[2] = '\0';
901
902 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
903 0, NL80211_CMD_REQ_SET_REG, 0);
904
905 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
906 if (send_and_recv_msgs(drv, msg, NULL, NULL))
907 return -EINVAL;
908 return 0;
909 nla_put_failure:
910 return -EINVAL;
911 }
912
913
914 #ifndef HOSTAPD
915 struct wiphy_info_data {
916 int max_scan_ssids;
917 int ap_supported;
918 int auth_supported;
919 int connect_supported;
920 };
921
922
923 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
924 {
925 struct nlattr *tb[NL80211_ATTR_MAX + 1];
926 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
927 struct wiphy_info_data *info = arg;
928
929 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
930 genlmsg_attrlen(gnlh, 0), NULL);
931
932 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
933 info->max_scan_ssids =
934 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
935
936 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
937 struct nlattr *nl_mode;
938 int i;
939 nla_for_each_nested(nl_mode,
940 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
941 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
942 info->ap_supported = 1;
943 break;
944 }
945 }
946 }
947
948 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
949 struct nlattr *nl_cmd;
950 int i;
951
952 nla_for_each_nested(nl_cmd,
953 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
954 u32 cmd = nla_get_u32(nl_cmd);
955 if (cmd == NL80211_CMD_AUTHENTICATE)
956 info->auth_supported = 1;
957 else if (cmd == NL80211_CMD_CONNECT)
958 info->connect_supported = 1;
959 }
960 }
961
962 return NL_SKIP;
963 }
964
965
966 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
967 struct wiphy_info_data *info)
968 {
969 struct nl_msg *msg;
970
971 os_memset(info, 0, sizeof(*info));
972 msg = nlmsg_alloc();
973 if (!msg)
974 return -1;
975
976 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
977 0, NL80211_CMD_GET_WIPHY, 0);
978
979 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
980
981 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
982 return 0;
983 msg = NULL;
984 nla_put_failure:
985 nlmsg_free(msg);
986 return -1;
987 }
988
989
990 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
991 {
992 struct wiphy_info_data info;
993 if (wpa_driver_nl80211_get_info(drv, &info))
994 return -1;
995 drv->has_capability = 1;
996 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
997 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
998 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
999 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1000 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1001 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1002 WPA_DRIVER_CAPA_ENC_WEP104 |
1003 WPA_DRIVER_CAPA_ENC_TKIP |
1004 WPA_DRIVER_CAPA_ENC_CCMP;
1005
1006 drv->capa.max_scan_ssids = info.max_scan_ssids;
1007 if (info.ap_supported)
1008 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1009
1010 if (info.auth_supported)
1011 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1012 else if (!info.connect_supported) {
1013 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1014 "authentication/association or connect commands");
1015 return -1;
1016 }
1017
1018 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1019
1020 return 0;
1021 }
1022 #endif /* HOSTAPD */
1023
1024
1025 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1026 void *ctx)
1027 {
1028 int ret;
1029
1030 /* Initialize generic netlink and nl80211 */
1031
1032 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1033 if (drv->nl_cb == NULL) {
1034 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1035 "callbacks");
1036 goto err1;
1037 }
1038
1039 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1040 if (drv->nl_handle == NULL) {
1041 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1042 "callbacks");
1043 goto err2;
1044 }
1045
1046 drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1047 if (drv->nl_handle_event == NULL) {
1048 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1049 "callbacks (event)");
1050 goto err2b;
1051 }
1052
1053 if (genl_connect(drv->nl_handle)) {
1054 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1055 "netlink");
1056 goto err3;
1057 }
1058
1059 if (genl_connect(drv->nl_handle_event)) {
1060 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1061 "netlink (event)");
1062 goto err3;
1063 }
1064
1065 #ifdef CONFIG_LIBNL20
1066 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1067 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1068 "netlink cache");
1069 goto err3;
1070 }
1071 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1072 0) {
1073 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1074 "netlink cache (event)");
1075 goto err3b;
1076 }
1077 #else /* CONFIG_LIBNL20 */
1078 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1079 if (drv->nl_cache == NULL) {
1080 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1081 "netlink cache");
1082 goto err3;
1083 }
1084 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1085 if (drv->nl_cache_event == NULL) {
1086 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1087 "netlink cache (event)");
1088 goto err3b;
1089 }
1090 #endif /* CONFIG_LIBNL20 */
1091
1092 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1093 if (drv->nl80211 == NULL) {
1094 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1095 "found");
1096 goto err4;
1097 }
1098
1099 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1100 if (ret >= 0)
1101 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1102 if (ret < 0) {
1103 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1104 "membership for scan events: %d (%s)",
1105 ret, strerror(-ret));
1106 goto err4;
1107 }
1108
1109 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1110 if (ret >= 0)
1111 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1112 if (ret < 0) {
1113 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1114 "membership for mlme events: %d (%s)",
1115 ret, strerror(-ret));
1116 goto err4;
1117 }
1118
1119 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1120 wpa_driver_nl80211_event_receive, drv, ctx);
1121
1122 return 0;
1123
1124 err4:
1125 nl_cache_free(drv->nl_cache_event);
1126 err3b:
1127 nl_cache_free(drv->nl_cache);
1128 err3:
1129 nl_handle_destroy(drv->nl_handle_event);
1130 err2b:
1131 nl_handle_destroy(drv->nl_handle);
1132 err2:
1133 nl_cb_put(drv->nl_cb);
1134 err1:
1135 return -1;
1136 }
1137
1138
1139 /**
1140 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1141 * @ctx: context to be used when calling wpa_supplicant functions,
1142 * e.g., wpa_supplicant_event()
1143 * @ifname: interface name, e.g., wlan0
1144 * Returns: Pointer to private data, %NULL on failure
1145 */
1146 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1147 {
1148 struct wpa_driver_nl80211_data *drv;
1149 struct netlink_config *cfg;
1150
1151 drv = os_zalloc(sizeof(*drv));
1152 if (drv == NULL)
1153 return NULL;
1154 drv->ctx = ctx;
1155 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1156 drv->monitor_ifidx = -1;
1157 drv->monitor_sock = -1;
1158 drv->ioctl_sock = -1;
1159
1160 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1161 os_free(drv);
1162 return NULL;
1163 }
1164
1165 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1166 if (drv->ioctl_sock < 0) {
1167 perror("socket(PF_INET,SOCK_DGRAM)");
1168 goto failed;
1169 }
1170
1171 cfg = os_zalloc(sizeof(*cfg));
1172 if (cfg == NULL)
1173 goto failed;
1174 cfg->ctx = drv;
1175 cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1176 cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1177 drv->netlink = netlink_init(cfg);
1178 if (drv->netlink == NULL) {
1179 os_free(cfg);
1180 goto failed;
1181 }
1182 if (wpa_driver_nl80211_finish_drv_init(drv))
1183 goto failed;
1184
1185 return drv;
1186
1187 failed:
1188 netlink_deinit(drv->netlink);
1189 if (drv->ioctl_sock >= 0)
1190 close(drv->ioctl_sock);
1191
1192 genl_family_put(drv->nl80211);
1193 nl_cache_free(drv->nl_cache);
1194 nl_handle_destroy(drv->nl_handle);
1195 nl_cb_put(drv->nl_cb);
1196
1197 os_free(drv);
1198 return NULL;
1199 }
1200
1201
1202 static int
1203 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1204 {
1205 drv->ifindex = if_nametoindex(drv->ifname);
1206
1207 #ifndef HOSTAPD
1208 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1209 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1210 "use managed mode");
1211 }
1212
1213 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1214 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1215 "UP", drv->ifname);
1216 return -1;
1217 }
1218
1219 if (wpa_driver_nl80211_capa(drv))
1220 return -1;
1221
1222 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1223 1, IF_OPER_DORMANT);
1224 #endif /* HOSTAPD */
1225
1226 return 0;
1227 }
1228
1229
1230 #ifdef HOSTAPD
1231 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1232 {
1233 struct i802_bss *bss, *prev;
1234 bss = drv->bss.next;
1235 while (bss) {
1236 prev = bss;
1237 bss = bss->next;
1238 os_free(bss);
1239 }
1240 }
1241 #endif /* HOSTAPD */
1242
1243
1244 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1245 {
1246 struct nl_msg *msg;
1247
1248 msg = nlmsg_alloc();
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1253 0, NL80211_CMD_DEL_BEACON, 0);
1254 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1255
1256 return send_and_recv_msgs(drv, msg, NULL, NULL);
1257 nla_put_failure:
1258 return -ENOBUFS;
1259 }
1260
1261
1262 /**
1263 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1264 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1265 *
1266 * Shut down driver interface and processing of driver events. Free
1267 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1268 */
1269 static void wpa_driver_nl80211_deinit(void *priv)
1270 {
1271 struct wpa_driver_nl80211_data *drv = priv;
1272
1273 nl80211_remove_monitor_interface(drv);
1274 if (drv->monitor_sock >= 0) {
1275 eloop_unregister_read_sock(drv->monitor_sock);
1276 close(drv->monitor_sock);
1277 }
1278
1279 if (drv->nlmode == NL80211_IFTYPE_AP)
1280 wpa_driver_nl80211_del_beacon(drv);
1281
1282 #ifdef HOSTAPD
1283 if (drv->last_freq_ht) {
1284 /* Clear HT flags from the driver */
1285 struct hostapd_freq_params freq;
1286 os_memset(&freq, 0, sizeof(freq));
1287 freq.freq = drv->last_freq;
1288 i802_set_freq(priv, &freq);
1289 }
1290
1291 if (drv->eapol_sock >= 0) {
1292 eloop_unregister_read_sock(drv->eapol_sock);
1293 close(drv->eapol_sock);
1294 }
1295
1296 if (drv->if_indices != drv->default_if_indices)
1297 os_free(drv->if_indices);
1298
1299 wpa_driver_nl80211_free_bss(drv);
1300 #endif /* HOSTAPD */
1301
1302 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1303 netlink_deinit(drv->netlink);
1304
1305 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1306
1307 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1308 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1309
1310 if (drv->ioctl_sock >= 0)
1311 close(drv->ioctl_sock);
1312
1313 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1314 genl_family_put(drv->nl80211);
1315 nl_cache_free(drv->nl_cache);
1316 nl_cache_free(drv->nl_cache_event);
1317 nl_handle_destroy(drv->nl_handle);
1318 nl_handle_destroy(drv->nl_handle_event);
1319 nl_cb_put(drv->nl_cb);
1320
1321 os_free(drv);
1322 }
1323
1324
1325 /**
1326 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1327 * @eloop_ctx: Driver private data
1328 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1329 *
1330 * This function can be used as registered timeout when starting a scan to
1331 * generate a scan completed event if the driver does not report this.
1332 */
1333 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1334 {
1335 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1336 if (drv->ap_scan_as_station) {
1337 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1338 drv->ap_scan_as_station = 0;
1339 }
1340 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1341 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1342 }
1343
1344
1345 /**
1346 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1347 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1348 * @params: Scan parameters
1349 * Returns: 0 on success, -1 on failure
1350 */
1351 static int wpa_driver_nl80211_scan(void *priv,
1352 struct wpa_driver_scan_params *params)
1353 {
1354 struct wpa_driver_nl80211_data *drv = priv;
1355 int ret = 0, timeout;
1356 struct nl_msg *msg, *ssids, *freqs;
1357 size_t i;
1358
1359 msg = nlmsg_alloc();
1360 ssids = nlmsg_alloc();
1361 freqs = nlmsg_alloc();
1362 if (!msg || !ssids || !freqs) {
1363 nlmsg_free(msg);
1364 nlmsg_free(ssids);
1365 nlmsg_free(freqs);
1366 return -1;
1367 }
1368
1369 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1370 NL80211_CMD_TRIGGER_SCAN, 0);
1371
1372 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1373
1374 for (i = 0; i < params->num_ssids; i++) {
1375 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1376 params->ssids[i].ssid);
1377 }
1378 if (params->num_ssids)
1379 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1380
1381 if (params->extra_ies) {
1382 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1383 params->extra_ies);
1384 }
1385
1386 if (params->freqs) {
1387 for (i = 0; params->freqs[i]; i++)
1388 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1389 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1390 }
1391
1392 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1393 msg = NULL;
1394 if (ret) {
1395 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1396 "(%s)", ret, strerror(-ret));
1397 #ifdef HOSTAPD
1398 if (drv->nlmode == NL80211_IFTYPE_AP) {
1399 /*
1400 * mac80211 does not allow scan requests in AP mode, so
1401 * try to do this in station mode.
1402 */
1403 if (wpa_driver_nl80211_set_mode(drv,
1404 IEEE80211_MODE_INFRA))
1405 goto nla_put_failure;
1406
1407 if (wpa_driver_nl80211_scan(drv, params)) {
1408 wpa_driver_nl80211_set_mode(drv,
1409 IEEE80211_MODE_AP);
1410 goto nla_put_failure;
1411 }
1412
1413 /* Restore AP mode when processing scan results */
1414 drv->ap_scan_as_station = 1;
1415 ret = 0;
1416 } else
1417 goto nla_put_failure;
1418 #else /* HOSTAPD */
1419 goto nla_put_failure;
1420 #endif /* HOSTAPD */
1421 }
1422
1423 /* Not all drivers generate "scan completed" wireless event, so try to
1424 * read results after a timeout. */
1425 timeout = 10;
1426 if (drv->scan_complete_events) {
1427 /*
1428 * The driver seems to deliver events to notify when scan is
1429 * complete, so use longer timeout to avoid race conditions
1430 * with scanning and following association request.
1431 */
1432 timeout = 30;
1433 }
1434 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1435 "seconds", ret, timeout);
1436 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1437 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1438 drv, drv->ctx);
1439
1440 nla_put_failure:
1441 nlmsg_free(ssids);
1442 nlmsg_free(msg);
1443 nlmsg_free(freqs);
1444 return ret;
1445 }
1446
1447
1448 static int bss_info_handler(struct nl_msg *msg, void *arg)
1449 {
1450 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1451 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1452 struct nlattr *bss[NL80211_BSS_MAX + 1];
1453 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1454 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1455 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1456 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1457 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1458 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1459 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1460 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1461 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1462 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1463 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1464 };
1465 struct wpa_scan_results *res = arg;
1466 struct wpa_scan_res **tmp;
1467 struct wpa_scan_res *r;
1468 const u8 *ie;
1469 size_t ie_len;
1470
1471 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1472 genlmsg_attrlen(gnlh, 0), NULL);
1473 if (!tb[NL80211_ATTR_BSS])
1474 return NL_SKIP;
1475 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1476 bss_policy))
1477 return NL_SKIP;
1478 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1479 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1480 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1481 } else {
1482 ie = NULL;
1483 ie_len = 0;
1484 }
1485
1486 r = os_zalloc(sizeof(*r) + ie_len);
1487 if (r == NULL)
1488 return NL_SKIP;
1489 if (bss[NL80211_BSS_BSSID])
1490 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1491 ETH_ALEN);
1492 if (bss[NL80211_BSS_FREQUENCY])
1493 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1494 if (bss[NL80211_BSS_BEACON_INTERVAL])
1495 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1496 if (bss[NL80211_BSS_CAPABILITY])
1497 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1498 r->flags |= WPA_SCAN_NOISE_INVALID;
1499 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1500 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1501 r->level /= 100; /* mBm to dBm */
1502 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1503 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1504 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1505 r->flags |= WPA_SCAN_LEVEL_INVALID;
1506 } else
1507 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1508 if (bss[NL80211_BSS_TSF])
1509 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1510 if (bss[NL80211_BSS_SEEN_MS_AGO])
1511 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1512 r->ie_len = ie_len;
1513 if (ie)
1514 os_memcpy(r + 1, ie, ie_len);
1515
1516 if (bss[NL80211_BSS_STATUS]) {
1517 enum nl80211_bss_status status;
1518 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1519 switch (status) {
1520 case NL80211_BSS_STATUS_AUTHENTICATED:
1521 r->flags |= WPA_SCAN_AUTHENTICATED;
1522 break;
1523 case NL80211_BSS_STATUS_ASSOCIATED:
1524 r->flags |= WPA_SCAN_ASSOCIATED;
1525 break;
1526 default:
1527 break;
1528 }
1529 }
1530
1531 tmp = os_realloc(res->res,
1532 (res->num + 1) * sizeof(struct wpa_scan_res *));
1533 if (tmp == NULL) {
1534 os_free(r);
1535 return NL_SKIP;
1536 }
1537 tmp[res->num++] = r;
1538 res->res = tmp;
1539
1540 return NL_SKIP;
1541 }
1542
1543
1544 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1545 const u8 *addr)
1546 {
1547 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1548 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1549 "mismatch");
1550 wpa_driver_nl80211_mlme(drv, addr,
1551 NL80211_CMD_DEAUTHENTICATE,
1552 WLAN_REASON_PREV_AUTH_NOT_VALID);
1553 }
1554 }
1555
1556
1557 static void wpa_driver_nl80211_check_bss_status(
1558 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1559 {
1560 size_t i;
1561
1562 for (i = 0; i < res->num; i++) {
1563 struct wpa_scan_res *r = res->res[i];
1564 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1565 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1566 "indicates BSS status with " MACSTR
1567 " as authenticated",
1568 MAC2STR(r->bssid));
1569 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1570 os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1571 os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1572 0) {
1573 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1574 " in local state (auth=" MACSTR
1575 " assoc=" MACSTR ")",
1576 MAC2STR(drv->auth_bssid),
1577 MAC2STR(drv->bssid));
1578 }
1579 }
1580
1581 if (r->flags & WPA_SCAN_ASSOCIATED) {
1582 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1583 "indicate BSS status with " MACSTR
1584 " as associated",
1585 MAC2STR(r->bssid));
1586 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1587 !drv->associated) {
1588 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1589 "(not associated) does not match "
1590 "with BSS state");
1591 clear_state_mismatch(drv, r->bssid);
1592 } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1593 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1594 0) {
1595 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1596 "(associated with " MACSTR ") does "
1597 "not match with BSS state",
1598 MAC2STR(drv->bssid));
1599 clear_state_mismatch(drv, r->bssid);
1600 clear_state_mismatch(drv, drv->bssid);
1601 }
1602 }
1603 }
1604 }
1605
1606
1607 /**
1608 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1609 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1610 * Returns: Scan results on success, -1 on failure
1611 */
1612 static struct wpa_scan_results *
1613 wpa_driver_nl80211_get_scan_results(void *priv)
1614 {
1615 struct wpa_driver_nl80211_data *drv = priv;
1616 struct nl_msg *msg;
1617 struct wpa_scan_results *res;
1618 int ret;
1619
1620 res = os_zalloc(sizeof(*res));
1621 if (res == NULL)
1622 return NULL;
1623 msg = nlmsg_alloc();
1624 if (!msg)
1625 goto nla_put_failure;
1626
1627 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1628 NL80211_CMD_GET_SCAN, 0);
1629 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1630
1631 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1632 msg = NULL;
1633 if (ret == 0) {
1634 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1635 (unsigned long) res->num);
1636 wpa_driver_nl80211_check_bss_status(drv, res);
1637 return res;
1638 }
1639 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1640 "(%s)", ret, strerror(-ret));
1641 nla_put_failure:
1642 nlmsg_free(msg);
1643 wpa_scan_results_free(res);
1644 return NULL;
1645 }
1646
1647
1648 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1649 wpa_alg alg, const u8 *addr, int key_idx,
1650 int set_tx,
1651 const u8 *seq, size_t seq_len,
1652 const u8 *key, size_t key_len)
1653 {
1654 struct wpa_driver_nl80211_data *drv = priv;
1655 int ifindex = if_nametoindex(ifname);
1656 struct nl_msg *msg;
1657 int ret;
1658
1659 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1660 "set_tx=%d seq_len=%lu key_len=%lu",
1661 __func__, ifindex, alg, addr, key_idx, set_tx,
1662 (unsigned long) seq_len, (unsigned long) key_len);
1663
1664 msg = nlmsg_alloc();
1665 if (!msg)
1666 return -ENOMEM;
1667
1668 if (alg == WPA_ALG_NONE) {
1669 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1670 0, NL80211_CMD_DEL_KEY, 0);
1671 } else {
1672 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1673 0, NL80211_CMD_NEW_KEY, 0);
1674 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1675 switch (alg) {
1676 case WPA_ALG_WEP:
1677 if (key_len == 5)
1678 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1679 WLAN_CIPHER_SUITE_WEP40);
1680 else
1681 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1682 WLAN_CIPHER_SUITE_WEP104);
1683 break;
1684 case WPA_ALG_TKIP:
1685 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1686 WLAN_CIPHER_SUITE_TKIP);
1687 break;
1688 case WPA_ALG_CCMP:
1689 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1690 WLAN_CIPHER_SUITE_CCMP);
1691 break;
1692 case WPA_ALG_IGTK:
1693 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1694 WLAN_CIPHER_SUITE_AES_CMAC);
1695 break;
1696 default:
1697 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1698 "algorithm %d", __func__, alg);
1699 nlmsg_free(msg);
1700 return -1;
1701 }
1702 }
1703
1704 if (seq && seq_len)
1705 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1706
1707 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1708 {
1709 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1710 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1711 }
1712 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1713 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1714
1715 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1716 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1717 ret = 0;
1718 if (ret)
1719 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1720 ret, strerror(-ret));
1721
1722 /*
1723 * If we failed or don't need to set the default TX key (below),
1724 * we're done here.
1725 */
1726 if (ret || !set_tx || alg == WPA_ALG_NONE)
1727 return ret;
1728 #ifdef HOSTAPD /* FIX: is this needed? */
1729 if (addr)
1730 return ret;
1731 #endif /* HOSTAPD */
1732
1733 msg = nlmsg_alloc();
1734 if (!msg)
1735 return -ENOMEM;
1736
1737 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1738 0, NL80211_CMD_SET_KEY, 0);
1739 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1740 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1741 if (alg == WPA_ALG_IGTK)
1742 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1743 else
1744 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1745
1746 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1747 if (ret == -ENOENT)
1748 ret = 0;
1749 if (ret)
1750 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1751 "err=%d %s)", ret, strerror(-ret));
1752 return ret;
1753
1754 nla_put_failure:
1755 return -ENOBUFS;
1756 }
1757
1758
1759 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1760 int key_idx, int defkey,
1761 const u8 *seq, size_t seq_len,
1762 const u8 *key, size_t key_len)
1763 {
1764 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1765 if (!key_attr)
1766 return -1;
1767
1768 if (defkey && alg == WPA_ALG_IGTK)
1769 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1770 else if (defkey)
1771 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1772
1773 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1774
1775 switch (alg) {
1776 case WPA_ALG_WEP:
1777 if (key_len == 5)
1778 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1779 WLAN_CIPHER_SUITE_WEP40);
1780 else
1781 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1782 WLAN_CIPHER_SUITE_WEP104);
1783 break;
1784 case WPA_ALG_TKIP:
1785 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1786 break;
1787 case WPA_ALG_CCMP:
1788 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1789 break;
1790 case WPA_ALG_IGTK:
1791 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1792 WLAN_CIPHER_SUITE_AES_CMAC);
1793 break;
1794 default:
1795 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1796 "algorithm %d", __func__, alg);
1797 return -1;
1798 }
1799
1800 if (seq && seq_len)
1801 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1802
1803 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1804
1805 nla_nest_end(msg, key_attr);
1806
1807 return 0;
1808 nla_put_failure:
1809 return -1;
1810 }
1811
1812
1813 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1814 struct nl_msg *msg)
1815 {
1816 int i, privacy = 0;
1817 struct nlattr *nl_keys, *nl_key;
1818
1819 for (i = 0; i < 4; i++) {
1820 if (!params->wep_key[i])
1821 continue;
1822 privacy = 1;
1823 break;
1824 }
1825 if (!privacy)
1826 return 0;
1827
1828 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1829
1830 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1831 if (!nl_keys)
1832 goto nla_put_failure;
1833
1834 for (i = 0; i < 4; i++) {
1835 if (!params->wep_key[i])
1836 continue;
1837
1838 nl_key = nla_nest_start(msg, i);
1839 if (!nl_key)
1840 goto nla_put_failure;
1841
1842 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1843 params->wep_key[i]);
1844 if (params->wep_key_len[i] == 5)
1845 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1846 WLAN_CIPHER_SUITE_WEP40);
1847 else
1848 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1849 WLAN_CIPHER_SUITE_WEP104);
1850
1851 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1852
1853 if (i == params->wep_tx_keyidx)
1854 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1855
1856 nla_nest_end(msg, nl_key);
1857 }
1858 nla_nest_end(msg, nl_keys);
1859
1860 return 0;
1861
1862 nla_put_failure:
1863 return -ENOBUFS;
1864 }
1865
1866
1867 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1868 const u8 *addr, int cmd, u16 reason_code)
1869 {
1870 int ret = -1;
1871 struct nl_msg *msg;
1872
1873 msg = nlmsg_alloc();
1874 if (!msg)
1875 return -1;
1876
1877 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1878
1879 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1880 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1881 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1882
1883 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1884 msg = NULL;
1885 if (ret) {
1886 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1887 "(%s)", ret, strerror(-ret));
1888 goto nla_put_failure;
1889 }
1890 ret = 0;
1891
1892 nla_put_failure:
1893 nlmsg_free(msg);
1894 return ret;
1895 }
1896
1897
1898 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1899 const u8 *addr, int reason_code)
1900 {
1901 wpa_printf(MSG_DEBUG, "%s", __func__);
1902 drv->associated = 0;
1903 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1904 reason_code);
1905 }
1906
1907
1908 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1909 int reason_code)
1910 {
1911 struct wpa_driver_nl80211_data *drv = priv;
1912 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1913 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1914 wpa_printf(MSG_DEBUG, "%s", __func__);
1915 drv->associated = 0;
1916 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1917 reason_code);
1918 }
1919
1920
1921 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1922 int reason_code)
1923 {
1924 struct wpa_driver_nl80211_data *drv = priv;
1925 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1926 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1927 wpa_printf(MSG_DEBUG, "%s", __func__);
1928 drv->associated = 0;
1929 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1930 reason_code);
1931 }
1932
1933
1934 static int wpa_driver_nl80211_authenticate(
1935 void *priv, struct wpa_driver_auth_params *params)
1936 {
1937 struct wpa_driver_nl80211_data *drv = priv;
1938 int ret = -1, i;
1939 struct nl_msg *msg;
1940 enum nl80211_auth_type type;
1941 int count = 0;
1942
1943 drv->associated = 0;
1944 os_memset(drv->auth_bssid, 0, ETH_ALEN);
1945
1946 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1947 return -1;
1948
1949 retry:
1950 msg = nlmsg_alloc();
1951 if (!msg)
1952 return -1;
1953
1954 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1955 drv->ifindex);
1956
1957 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1958 NL80211_CMD_AUTHENTICATE, 0);
1959
1960 for (i = 0; i < 4; i++) {
1961 if (!params->wep_key[i])
1962 continue;
1963 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1964 i,
1965 i == params->wep_tx_keyidx, NULL, 0,
1966 params->wep_key[i],
1967 params->wep_key_len[i]);
1968 if (params->wep_tx_keyidx != i)
1969 continue;
1970 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1971 params->wep_key[i], params->wep_key_len[i])) {
1972 nlmsg_free(msg);
1973 return -1;
1974 }
1975 }
1976
1977 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1978 if (params->bssid) {
1979 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1980 MAC2STR(params->bssid));
1981 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1982 }
1983 if (params->freq) {
1984 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1985 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1986 }
1987 if (params->ssid) {
1988 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1989 params->ssid, params->ssid_len);
1990 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1991 params->ssid);
1992 }
1993 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1994 if (params->ie)
1995 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1996 /*
1997 * TODO: if multiple auth_alg options enabled, try them one by one if
1998 * the AP rejects authentication due to unknown auth alg
1999 */
2000 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2001 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2002 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2003 type = NL80211_AUTHTYPE_SHARED_KEY;
2004 else if (params->auth_alg & AUTH_ALG_LEAP)
2005 type = NL80211_AUTHTYPE_NETWORK_EAP;
2006 else if (params->auth_alg & AUTH_ALG_FT)
2007 type = NL80211_AUTHTYPE_FT;
2008 else
2009 goto nla_put_failure;
2010 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
2011 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2012
2013 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2014 msg = NULL;
2015 if (ret) {
2016 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2017 "(%s)", ret, strerror(-ret));
2018 count++;
2019 if (ret == -EALREADY && count == 1 && params->bssid) {
2020 /*
2021 * mac80211 does not currently accept new
2022 * authentication if we are already authenticated. As a
2023 * workaround, force deauthentication and try again.
2024 */
2025 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2026 "after forced deauthentication");
2027 wpa_driver_nl80211_deauthenticate(
2028 drv, params->bssid,
2029 WLAN_REASON_PREV_AUTH_NOT_VALID);
2030 nlmsg_free(msg);
2031 goto retry;
2032 }
2033 goto nla_put_failure;
2034 }
2035 ret = 0;
2036 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2037 "successfully");
2038
2039 nla_put_failure:
2040 nlmsg_free(msg);
2041 return ret;
2042 }
2043
2044
2045 struct phy_info_arg {
2046 u16 *num_modes;
2047 struct hostapd_hw_modes *modes;
2048 };
2049
2050 static int phy_info_handler(struct nl_msg *msg, void *arg)
2051 {
2052 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2053 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2054 struct phy_info_arg *phy_info = arg;
2055
2056 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2057
2058 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2059 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2060 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2061 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2062 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2063 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2064 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2065 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2066 };
2067
2068 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2069 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2070 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2071 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2072 };
2073
2074 struct nlattr *nl_band;
2075 struct nlattr *nl_freq;
2076 struct nlattr *nl_rate;
2077 int rem_band, rem_freq, rem_rate;
2078 struct hostapd_hw_modes *mode;
2079 int idx, mode_is_set;
2080
2081 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2082 genlmsg_attrlen(gnlh, 0), NULL);
2083
2084 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2085 return NL_SKIP;
2086
2087 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2088 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2089 if (!mode)
2090 return NL_SKIP;
2091 phy_info->modes = mode;
2092
2093 mode_is_set = 0;
2094
2095 mode = &phy_info->modes[*(phy_info->num_modes)];
2096 memset(mode, 0, sizeof(*mode));
2097 *(phy_info->num_modes) += 1;
2098
2099 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2100 nla_len(nl_band), NULL);
2101
2102 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2103 mode->ht_capab = nla_get_u16(
2104 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2105 }
2106
2107 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2108 mode->a_mpdu_params |= nla_get_u8(
2109 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2110 0x03;
2111 }
2112
2113 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2114 mode->a_mpdu_params |= nla_get_u8(
2115 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2116 2;
2117 }
2118
2119 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2120 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2121 u8 *mcs;
2122 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2123 os_memcpy(mode->mcs_set, mcs, 16);
2124 }
2125
2126 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2127 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2128 nla_len(nl_freq), freq_policy);
2129 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2130 continue;
2131 mode->num_channels++;
2132 }
2133
2134 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2135 if (!mode->channels)
2136 return NL_SKIP;
2137
2138 idx = 0;
2139
2140 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2141 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2142 nla_len(nl_freq), freq_policy);
2143 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2144 continue;
2145
2146 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2147 mode->channels[idx].flag = 0;
2148
2149 if (!mode_is_set) {
2150 /* crude heuristic */
2151 if (mode->channels[idx].freq < 4000)
2152 mode->mode = HOSTAPD_MODE_IEEE80211B;
2153 else
2154 mode->mode = HOSTAPD_MODE_IEEE80211A;
2155 mode_is_set = 1;
2156 }
2157
2158 /* crude heuristic */
2159 if (mode->channels[idx].freq < 4000)
2160 if (mode->channels[idx].freq == 2484)
2161 mode->channels[idx].chan = 14;
2162 else
2163 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2164 else
2165 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2166
2167 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2168 mode->channels[idx].flag |=
2169 HOSTAPD_CHAN_DISABLED;
2170 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2171 mode->channels[idx].flag |=
2172 HOSTAPD_CHAN_PASSIVE_SCAN;
2173 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2174 mode->channels[idx].flag |=
2175 HOSTAPD_CHAN_NO_IBSS;
2176 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2177 mode->channels[idx].flag |=
2178 HOSTAPD_CHAN_RADAR;
2179
2180 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2181 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2182 mode->channels[idx].max_tx_power =
2183 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2184
2185 idx++;
2186 }
2187
2188 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2189 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2190 nla_len(nl_rate), rate_policy);
2191 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2192 continue;
2193 mode->num_rates++;
2194 }
2195
2196 mode->rates = calloc(mode->num_rates, sizeof(int));
2197 if (!mode->rates)
2198 return NL_SKIP;
2199
2200 idx = 0;
2201
2202 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2203 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2204 nla_len(nl_rate), rate_policy);
2205 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2206 continue;
2207 mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2208
2209 /* crude heuristic */
2210 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2211 mode->rates[idx] > 200)
2212 mode->mode = HOSTAPD_MODE_IEEE80211G;
2213
2214 idx++;
2215 }
2216 }
2217
2218 return NL_SKIP;
2219 }
2220
2221 static struct hostapd_hw_modes *
2222 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2223 {
2224 u16 m;
2225 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2226 int i, mode11g_idx = -1;
2227
2228 /* If only 802.11g mode is included, use it to construct matching
2229 * 802.11b mode data. */
2230
2231 for (m = 0; m < *num_modes; m++) {
2232 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2233 return modes; /* 802.11b already included */
2234 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2235 mode11g_idx = m;
2236 }
2237
2238 if (mode11g_idx < 0)
2239 return modes; /* 2.4 GHz band not supported at all */
2240
2241 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2242 if (nmodes == NULL)
2243 return modes; /* Could not add 802.11b mode */
2244
2245 mode = &nmodes[*num_modes];
2246 os_memset(mode, 0, sizeof(*mode));
2247 (*num_modes)++;
2248 modes = nmodes;
2249
2250 mode->mode = HOSTAPD_MODE_IEEE80211B;
2251
2252 mode11g = &modes[mode11g_idx];
2253 mode->num_channels = mode11g->num_channels;
2254 mode->channels = os_malloc(mode11g->num_channels *
2255 sizeof(struct hostapd_channel_data));
2256 if (mode->channels == NULL) {
2257 (*num_modes)--;
2258 return modes; /* Could not add 802.11b mode */
2259 }
2260 os_memcpy(mode->channels, mode11g->channels,
2261 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2262
2263 mode->num_rates = 0;
2264 mode->rates = os_malloc(4 * sizeof(int));
2265 if (mode->rates == NULL) {
2266 os_free(mode->channels);
2267 (*num_modes)--;
2268 return modes; /* Could not add 802.11b mode */
2269 }
2270
2271 for (i = 0; i < mode11g->num_rates; i++) {
2272 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2273 mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2274 continue;
2275 mode->rates[mode->num_rates] = mode11g->rates[i];
2276 mode->num_rates++;
2277 if (mode->num_rates == 4)
2278 break;
2279 }
2280
2281 if (mode->num_rates == 0) {
2282 os_free(mode->channels);
2283 os_free(mode->rates);
2284 (*num_modes)--;
2285 return modes; /* No 802.11b rates */
2286 }
2287
2288 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2289 "information");
2290
2291 return modes;
2292 }
2293
2294
2295 static struct hostapd_hw_modes *
2296 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2297 {
2298 struct wpa_driver_nl80211_data *drv = priv;
2299 struct nl_msg *msg;
2300 struct phy_info_arg result = {
2301 .num_modes = num_modes,
2302 .modes = NULL,
2303 };
2304
2305 *num_modes = 0;
2306 *flags = 0;
2307
2308 msg = nlmsg_alloc();
2309 if (!msg)
2310 return NULL;
2311
2312 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2313 0, NL80211_CMD_GET_WIPHY, 0);
2314
2315 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2316
2317 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2318 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2319 nla_put_failure:
2320 return NULL;
2321 }
2322
2323
2324 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2325 const void *data, size_t len,
2326 int encrypt)
2327 {
2328 __u8 rtap_hdr[] = {
2329 0x00, 0x00, /* radiotap version */
2330 0x0e, 0x00, /* radiotap length */
2331 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2332 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2333 0x00, /* padding */
2334 0x00, 0x00, /* RX and TX flags to indicate that */
2335 0x00, 0x00, /* this is the injected frame directly */
2336 };
2337 struct iovec iov[2] = {
2338 {
2339 .iov_base = &rtap_hdr,
2340 .iov_len = sizeof(rtap_hdr),
2341 },
2342 {
2343 .iov_base = (void *) data,
2344 .iov_len = len,
2345 }
2346 };
2347 struct msghdr msg = {
2348 .msg_name = NULL,
2349 .msg_namelen = 0,
2350 .msg_iov = iov,
2351 .msg_iovlen = 2,
2352 .msg_control = NULL,
2353 .msg_controllen = 0,
2354 .msg_flags = 0,
2355 };
2356
2357 if (encrypt)
2358 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2359
2360 return sendmsg(drv->monitor_sock, &msg, 0);
2361 }
2362
2363
2364 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2365 size_t data_len)
2366 {
2367 struct wpa_driver_nl80211_data *drv = priv;
2368 struct ieee80211_mgmt *mgmt;
2369 int encrypt = 1;
2370 u16 fc;
2371
2372 mgmt = (struct ieee80211_mgmt *) data;
2373 fc = le_to_host16(mgmt->frame_control);
2374
2375 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2376 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2377 /*
2378 * Only one of the authentication frame types is encrypted.
2379 * In order for static WEP encryption to work properly (i.e.,
2380 * to not encrypt the frame), we need to tell mac80211 about
2381 * the frames that must not be encrypted.
2382 */
2383 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2384 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2385 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2386 encrypt = 0;
2387 }
2388
2389 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2390 }
2391
2392
2393 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2394 const u8 *head, size_t head_len,
2395 const u8 *tail, size_t tail_len,
2396 int dtim_period, int beacon_int)
2397 {
2398 struct wpa_driver_nl80211_data *drv = priv;
2399 struct nl_msg *msg;
2400 u8 cmd = NL80211_CMD_NEW_BEACON;
2401 int ret;
2402 int beacon_set;
2403 int ifindex = if_nametoindex(ifname);
2404 #ifdef HOSTAPD
2405 struct i802_bss *bss;
2406
2407 bss = get_bss(drv, ifindex);
2408 if (bss == NULL)
2409 return -ENOENT;
2410 beacon_set = bss->beacon_set;
2411 #else /* HOSTAPD */
2412 beacon_set = drv->beacon_set;
2413 #endif /* HOSTAPD */
2414
2415 msg = nlmsg_alloc();
2416 if (!msg)
2417 return -ENOMEM;
2418
2419 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2420 beacon_set);
2421 if (beacon_set)
2422 cmd = NL80211_CMD_SET_BEACON;
2423
2424 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2425 0, cmd, 0);
2426 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2427 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2428 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2429 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2430 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2431
2432 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2433 if (ret) {
2434 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2435 ret, strerror(-ret));
2436 } else {
2437 #ifdef HOSTAPD
2438 bss->beacon_set = 1;
2439 #else /* HOSTAPD */
2440 drv->beacon_set = 1;
2441 #endif /* HOSTAPD */
2442 }
2443 return ret;
2444 nla_put_failure:
2445 return -ENOBUFS;
2446 }
2447
2448
2449 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2450 int freq, int ht_enabled,
2451 int sec_channel_offset)
2452 {
2453 struct nl_msg *msg;
2454 int ret;
2455
2456 msg = nlmsg_alloc();
2457 if (!msg)
2458 return -1;
2459
2460 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2461 NL80211_CMD_SET_WIPHY, 0);
2462
2463 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2464 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2465 if (ht_enabled) {
2466 switch (sec_channel_offset) {
2467 case -1:
2468 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2469 NL80211_CHAN_HT40MINUS);
2470 break;
2471 case 1:
2472 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2473 NL80211_CHAN_HT40PLUS);
2474 break;
2475 default:
2476 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2477 NL80211_CHAN_HT20);
2478 break;
2479 }
2480 }
2481
2482 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2483 if (ret == 0)
2484 return 0;
2485 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2486 "%d (%s)", freq, ret, strerror(-ret));
2487 nla_put_failure:
2488 return -1;
2489 }
2490
2491
2492 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2493 struct hostapd_sta_add_params *params)
2494 {
2495 struct wpa_driver_nl80211_data *drv = priv;
2496 struct nl_msg *msg;
2497 int ret = -ENOBUFS;
2498
2499 msg = nlmsg_alloc();
2500 if (!msg)
2501 return -ENOMEM;
2502
2503 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2504 0, NL80211_CMD_NEW_STATION, 0);
2505
2506 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2507 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2508 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2509 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2510 params->supp_rates);
2511 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2512 params->listen_interval);
2513 if (params->ht_capabilities) {
2514 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2515 sizeof(*params->ht_capabilities),
2516 params->ht_capabilities);
2517 }
2518
2519 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2520 if (ret)
2521 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2522 "result: %d (%s)", ret, strerror(-ret));
2523 if (ret == -EEXIST)
2524 ret = 0;
2525 nla_put_failure:
2526 return ret;
2527 }
2528
2529
2530 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2531 {
2532 struct wpa_driver_nl80211_data *drv = priv;
2533 struct nl_msg *msg;
2534 int ret;
2535
2536 msg = nlmsg_alloc();
2537 if (!msg)
2538 return -ENOMEM;
2539
2540 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2541 0, NL80211_CMD_DEL_STATION, 0);
2542
2543 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2544 if_nametoindex(drv->ifname));
2545 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2546
2547 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2548 if (ret == -ENOENT)
2549 return 0;
2550 return ret;
2551 nla_put_failure:
2552 return -ENOBUFS;
2553 }
2554
2555
2556 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2557 int ifidx)
2558 {
2559 struct nl_msg *msg;
2560
2561 #ifdef HOSTAPD
2562 /* stop listening for EAPOL on this interface */
2563 del_ifidx(drv, ifidx);
2564 #endif /* HOSTAPD */
2565
2566 msg = nlmsg_alloc();
2567 if (!msg)
2568 goto nla_put_failure;
2569
2570 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2571 0, NL80211_CMD_DEL_INTERFACE, 0);
2572 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2573
2574 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2575 return;
2576 nla_put_failure:
2577 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2578 ifidx);
2579 }
2580
2581
2582 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2583 const char *ifname,
2584 enum nl80211_iftype iftype,
2585 const u8 *addr)
2586 {
2587 struct nl_msg *msg, *flags = NULL;
2588 int ifidx;
2589 int ret = -ENOBUFS;
2590
2591 msg = nlmsg_alloc();
2592 if (!msg)
2593 return -1;
2594
2595 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2596 0, NL80211_CMD_NEW_INTERFACE, 0);
2597 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2598 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2599 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2600
2601 if (iftype == NL80211_IFTYPE_MONITOR) {
2602 int err;
2603
2604 flags = nlmsg_alloc();
2605 if (!flags)
2606 goto nla_put_failure;
2607
2608 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2609
2610 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2611
2612 nlmsg_free(flags);
2613
2614 if (err)
2615 goto nla_put_failure;
2616 }
2617
2618 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2619 if (ret) {
2620 nla_put_failure:
2621 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2622 ifname, ret, strerror(-ret));
2623 return ret;
2624 }
2625
2626 ifidx = if_nametoindex(ifname);
2627
2628 if (ifidx <= 0)
2629 return -1;
2630
2631 #ifdef HOSTAPD
2632 /* start listening for EAPOL on this interface */
2633 add_ifidx(drv, ifidx);
2634
2635 if (addr && iftype == NL80211_IFTYPE_AP &&
2636 set_ifhwaddr(drv, ifname, addr)) {
2637 nl80211_remove_iface(drv, ifidx);
2638 return -1;
2639 }
2640 #endif /* HOSTAPD */
2641
2642 return ifidx;
2643 }
2644
2645
2646 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2647 const char *ifname, enum nl80211_iftype iftype,
2648 const u8 *addr)
2649 {
2650 int ret;
2651
2652 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2653
2654 /* if error occured and interface exists already */
2655 if (ret == -ENFILE && if_nametoindex(ifname)) {
2656 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2657
2658 /* Try to remove the interface that was already there. */
2659 nl80211_remove_iface(drv, if_nametoindex(ifname));
2660
2661 /* Try to create the interface again */
2662 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2663 }
2664
2665 return ret;
2666 }
2667
2668
2669 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2670 {
2671 struct ieee80211_hdr *hdr;
2672 u16 fc;
2673 union wpa_event_data event;
2674
2675 hdr = (struct ieee80211_hdr *) buf;
2676 fc = le_to_host16(hdr->frame_control);
2677
2678 os_memset(&event, 0, sizeof(event));
2679 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2680 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2681 event.tx_status.dst = hdr->addr1;
2682 event.tx_status.data = buf;
2683 event.tx_status.data_len = len;
2684 event.tx_status.ack = ok;
2685 wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2686 }
2687
2688
2689 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2690 struct ieee80211_hdr *hdr, size_t len)
2691 {
2692 union wpa_event_data event;
2693 os_memset(&event, 0, sizeof(event));
2694 event.rx_from_unknown.hdr = hdr;
2695 event.rx_from_unknown.len = len;
2696 wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2697 }
2698
2699
2700 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2701 u8 *buf, size_t len,
2702 struct hostapd_frame_info *hfi)
2703 {
2704 struct ieee80211_hdr *hdr;
2705 u16 fc;
2706 union wpa_event_data event;
2707
2708 hdr = (struct ieee80211_hdr *) buf;
2709 fc = le_to_host16(hdr->frame_control);
2710
2711 switch (WLAN_FC_GET_TYPE(fc)) {
2712 case WLAN_FC_TYPE_MGMT:
2713 os_memset(&event, 0, sizeof(event));
2714 event.rx_mgmt.frame = buf;
2715 event.rx_mgmt.frame_len = len;
2716 event.rx_mgmt.fi = hfi;
2717 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2718 break;
2719 case WLAN_FC_TYPE_CTRL:
2720 /* can only get here with PS-Poll frames */
2721 wpa_printf(MSG_DEBUG, "CTRL");
2722 from_unknown_sta(drv, hdr, len);
2723 break;
2724 case WLAN_FC_TYPE_DATA:
2725 from_unknown_sta(drv, hdr, len);
2726 break;
2727 }
2728 }
2729
2730
2731 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2732 {
2733 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2734 int len;
2735 unsigned char buf[3000];
2736 struct ieee80211_radiotap_iterator iter;
2737 int ret;
2738 struct hostapd_frame_info hfi;
2739 int injected = 0, failed = 0, rxflags = 0;
2740
2741 len = recv(sock, buf, sizeof(buf), 0);
2742 if (len < 0) {
2743 perror("recv");
2744 return;
2745 }
2746
2747 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2748 printf("received invalid radiotap frame\n");
2749 return;
2750 }
2751
2752 memset(&hfi, 0, sizeof(hfi));
2753
2754 while (1) {
2755 ret = ieee80211_radiotap_iterator_next(&iter);
2756 if (ret == -ENOENT)
2757 break;
2758 if (ret) {
2759 printf("received invalid radiotap frame (%d)\n", ret);
2760 return;
2761 }
2762 switch (iter.this_arg_index) {
2763 case IEEE80211_RADIOTAP_FLAGS:
2764 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2765 len -= 4;
2766 break;
2767 case IEEE80211_RADIOTAP_RX_FLAGS:
2768 rxflags = 1;
2769 break;
2770 case IEEE80211_RADIOTAP_TX_FLAGS:
2771 injected = 1;
2772 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2773 IEEE80211_RADIOTAP_F_TX_FAIL;
2774 break;
2775 case IEEE80211_RADIOTAP_DATA_RETRIES:
2776 break;
2777 case IEEE80211_RADIOTAP_CHANNEL:
2778 /* TODO convert from freq/flags to channel number
2779 hfi.channel = XXX;
2780 */
2781 break;
2782 case IEEE80211_RADIOTAP_RATE:
2783 hfi.datarate = *iter.this_arg * 5;
2784 break;
2785 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2786 hfi.ssi_signal = *iter.this_arg;
2787 break;
2788 }
2789 }
2790
2791 if (rxflags && injected)
2792 return;
2793
2794 if (!injected)
2795 handle_frame(drv, buf + iter.max_length,
2796 len - iter.max_length, &hfi);
2797 else
2798 handle_tx_callback(drv->ctx, buf + iter.max_length,
2799 len - iter.max_length, !failed);
2800 }
2801
2802
2803 /*
2804 * we post-process the filter code later and rewrite
2805 * this to the offset to the last instruction
2806 */
2807 #define PASS 0xFF
2808 #define FAIL 0xFE
2809
2810 static struct sock_filter msock_filter_insns[] = {
2811 /*
2812 * do a little-endian load of the radiotap length field
2813 */
2814 /* load lower byte into A */
2815 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2816 /* put it into X (== index register) */
2817 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2818 /* load upper byte into A */
2819 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2820 /* left-shift it by 8 */
2821 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2822 /* or with X */
2823 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2824 /* put result into X */
2825 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2826
2827 /*
2828 * Allow management frames through, this also gives us those
2829 * management frames that we sent ourselves with status
2830 */
2831 /* load the lower byte of the IEEE 802.11 frame control field */
2832 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2833 /* mask off frame type and version */
2834 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2835 /* accept frame if it's both 0, fall through otherwise */
2836 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2837
2838 /*
2839 * TODO: add a bit to radiotap RX flags that indicates
2840 * that the sending station is not associated, then
2841 * add a filter here that filters on our DA and that flag
2842 * to allow us to deauth frames to that bad station.
2843 *
2844 * Not a regression -- we didn't do it before either.
2845 */
2846
2847 #if 0
2848 /*
2849 * drop non-data frames, WDS frames
2850 */
2851 /* load the lower byte of the frame control field */
2852 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2853 /* mask off QoS bit */
2854 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2855 /* drop non-data frames */
2856 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2857 /* load the upper byte of the frame control field */
2858 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2859 /* mask off toDS/fromDS */
2860 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2861 /* drop WDS frames */
2862 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2863 #endif
2864
2865 /*
2866 * add header length to index
2867 */
2868 /* load the lower byte of the frame control field */
2869 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2870 /* mask off QoS bit */
2871 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2872 /* right shift it by 6 to give 0 or 2 */
2873 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2874 /* add data frame header length */
2875 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2876 /* add index, was start of 802.11 header */
2877 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2878 /* move to index, now start of LL header */
2879 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2880
2881 /*
2882 * Accept empty data frames, we use those for
2883 * polling activity.
2884 */
2885 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2886 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2887
2888 /*
2889 * Accept EAPOL frames
2890 */
2891 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2892 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2893 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2894 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2895
2896 /* keep these last two statements or change the code below */
2897 /* return 0 == "DROP" */
2898 BPF_STMT(BPF_RET | BPF_K, 0),
2899 /* return ~0 == "keep all" */
2900 BPF_STMT(BPF_RET | BPF_K, ~0),
2901 };
2902
2903 static struct sock_fprog msock_filter = {
2904 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2905 .filter = msock_filter_insns,
2906 };
2907
2908
2909 static int add_monitor_filter(int s)
2910 {
2911 int idx;
2912
2913 /* rewrite all PASS/FAIL jump offsets */
2914 for (idx = 0; idx < msock_filter.len; idx++) {
2915 struct sock_filter *insn = &msock_filter_insns[idx];
2916
2917 if (BPF_CLASS(insn->code) == BPF_JMP) {
2918 if (insn->code == (BPF_JMP|BPF_JA)) {
2919 if (insn->k == PASS)
2920 insn->k = msock_filter.len - idx - 2;
2921 else if (insn->k == FAIL)
2922 insn->k = msock_filter.len - idx - 3;
2923 }
2924
2925 if (insn->jt == PASS)
2926 insn->jt = msock_filter.len - idx - 2;
2927 else if (insn->jt == FAIL)
2928 insn->jt = msock_filter.len - idx - 3;
2929
2930 if (insn->jf == PASS)
2931 insn->jf = msock_filter.len - idx - 2;
2932 else if (insn->jf == FAIL)
2933 insn->jf = msock_filter.len - idx - 3;
2934 }
2935 }
2936
2937 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2938 &msock_filter, sizeof(msock_filter))) {
2939 perror("SO_ATTACH_FILTER");
2940 return -1;
2941 }
2942
2943 return 0;
2944 }
2945
2946
2947 static void nl80211_remove_monitor_interface(
2948 struct wpa_driver_nl80211_data *drv)
2949 {
2950 if (drv->monitor_ifidx >= 0) {
2951 nl80211_remove_iface(drv, drv->monitor_ifidx);
2952 drv->monitor_ifidx = -1;
2953 }
2954 }
2955
2956
2957 static int
2958 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2959 {
2960 char buf[IFNAMSIZ];
2961 struct sockaddr_ll ll;
2962 int optval;
2963 socklen_t optlen;
2964
2965 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2966 buf[IFNAMSIZ - 1] = '\0';
2967
2968 drv->monitor_ifidx =
2969 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2970
2971 if (drv->monitor_ifidx < 0)
2972 return -1;
2973
2974 if (hostapd_set_iface_flags(drv, buf, 1))
2975 goto error;
2976
2977 memset(&ll, 0, sizeof(ll));
2978 ll.sll_family = AF_PACKET;
2979 ll.sll_ifindex = drv->monitor_ifidx;
2980 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2981 if (drv->monitor_sock < 0) {
2982 perror("socket[PF_PACKET,SOCK_RAW]");
2983 goto error;
2984 }
2985
2986 if (add_monitor_filter(drv->monitor_sock)) {
2987 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2988 "interface; do filtering in user space");
2989 /* This works, but will cost in performance. */
2990 }
2991
2992 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2993 perror("monitor socket bind");
2994 goto error;
2995 }
2996
2997 optlen = sizeof(optval);
2998 optval = 20;
2999 if (setsockopt
3000 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3001 perror("Failed to set socket priority");
3002 goto error;
3003 }
3004
3005 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3006 drv, NULL)) {
3007 printf("Could not register monitor read socket\n");
3008 goto error;
3009 }
3010
3011 return 0;
3012 error:
3013 nl80211_remove_monitor_interface(drv);
3014 return -1;
3015 }
3016
3017
3018 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3019
3020 static int wpa_driver_nl80211_hapd_send_eapol(
3021 void *priv, const u8 *addr, const u8 *data,
3022 size_t data_len, int encrypt, const u8 *own_addr)
3023 {
3024 struct wpa_driver_nl80211_data *drv = priv;
3025 struct ieee80211_hdr *hdr;
3026 size_t len;
3027 u8 *pos;
3028 int res;
3029 #if 0 /* FIX */
3030 int qos = sta->flags & WPA_STA_WMM;
3031 #else
3032 int qos = 0;
3033 #endif
3034
3035 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3036 data_len;
3037 hdr = os_zalloc(len);
3038 if (hdr == NULL) {
3039 printf("malloc() failed for i802_send_data(len=%lu)\n",
3040 (unsigned long) len);
3041 return -1;
3042 }
3043
3044 hdr->frame_control =
3045 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3046 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3047 if (encrypt)
3048 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3049 #if 0 /* To be enabled if qos determination is added above */
3050 if (qos) {
3051 hdr->frame_control |=
3052 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3053 }
3054 #endif
3055
3056 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3057 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3058 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3059 pos = (u8 *) (hdr + 1);
3060
3061 #if 0 /* To be enabled if qos determination is added above */
3062 if (qos) {
3063 /* add an empty QoS header if needed */
3064 pos[0] = 0;
3065 pos[1] = 0;
3066 pos += 2;
3067 }
3068 #endif
3069
3070 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3071 pos += sizeof(rfc1042_header);
3072 WPA_PUT_BE16(pos, ETH_P_PAE);
3073 pos += 2;
3074 memcpy(pos, data, data_len);
3075
3076 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3077 if (res < 0) {
3078 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3079 "failed: %d (%s)",
3080 (unsigned long) len, errno, strerror(errno));
3081 }
3082 free(hdr);
3083
3084 return res;
3085 }
3086
3087
3088 static u32 sta_flags_nl80211(int flags)
3089 {
3090 u32 f = 0;
3091
3092 if (flags & WPA_STA_AUTHORIZED)
3093 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3094 if (flags & WPA_STA_WMM)
3095 f |= BIT(NL80211_STA_FLAG_WME);
3096 if (flags & WPA_STA_SHORT_PREAMBLE)
3097 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3098 if (flags & WPA_STA_MFP)
3099 f |= BIT(NL80211_STA_FLAG_MFP);
3100
3101 return f;
3102 }
3103
3104
3105 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3106 int total_flags, int flags_or,
3107 int flags_and)
3108 {
3109 struct wpa_driver_nl80211_data *drv = priv;
3110 struct nl_msg *msg, *flags = NULL;
3111 struct nl80211_sta_flag_update upd;
3112
3113 msg = nlmsg_alloc();
3114 if (!msg)
3115 return -ENOMEM;
3116
3117 flags = nlmsg_alloc();
3118 if (!flags) {
3119 nlmsg_free(msg);
3120 return -ENOMEM;
3121 }
3122
3123 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3124 0, NL80211_CMD_SET_STATION, 0);
3125
3126 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3127 if_nametoindex(drv->ifname));
3128 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3129
3130 /*
3131 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3132 * can be removed eventually.
3133 */
3134 if (total_flags & WPA_STA_AUTHORIZED)
3135 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3136
3137 if (total_flags & WPA_STA_WMM)
3138 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3139
3140 if (total_flags & WPA_STA_SHORT_PREAMBLE)
3141 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3142
3143 if (total_flags & WPA_STA_MFP)
3144 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3145
3146 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3147 goto nla_put_failure;
3148
3149 os_memset(&upd, 0, sizeof(upd));
3150 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3151 upd.set = sta_flags_nl80211(flags_or);
3152 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3153
3154 nlmsg_free(flags);
3155
3156 return send_and_recv_msgs(drv, msg, NULL, NULL);
3157 nla_put_failure:
3158 nlmsg_free(flags);
3159 return -ENOBUFS;
3160 }
3161
3162
3163 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3164 struct wpa_driver_associate_params *params)
3165 {
3166 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3167 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3168 nl80211_remove_monitor_interface(drv);
3169 return -1;
3170 }
3171
3172 /* TODO: setup monitor interface (and add code somewhere to remove this
3173 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3174
3175 return 0;
3176 }
3177
3178
3179 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3180 {
3181 struct nl_msg *msg;
3182 int ret = -1;
3183
3184 msg = nlmsg_alloc();
3185 if (!msg)
3186 return -1;
3187
3188 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3189 NL80211_CMD_LEAVE_IBSS, 0);
3190 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3191 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3192 msg = NULL;
3193 if (ret) {
3194 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3195 "(%s)", ret, strerror(-ret));
3196 goto nla_put_failure;
3197 }
3198
3199 ret = 0;
3200 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3201
3202 nla_put_failure:
3203 nlmsg_free(msg);
3204 return ret;
3205 }
3206
3207
3208 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3209 struct wpa_driver_associate_params *params)
3210 {
3211 struct nl_msg *msg;
3212 int ret = -1;
3213 int count = 0;
3214
3215 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3216
3217 if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3218 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3219 "IBSS mode");
3220 return -1;
3221 }
3222
3223 retry:
3224 msg = nlmsg_alloc();
3225 if (!msg)
3226 return -1;
3227
3228 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3229 NL80211_CMD_JOIN_IBSS, 0);
3230 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3231
3232 if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3233 goto nla_put_failure;
3234
3235 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3236 params->ssid, params->ssid_len);
3237 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3238 params->ssid);
3239 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3240 drv->ssid_len = params->ssid_len;
3241
3242 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3243 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3244
3245 ret = nl80211_set_conn_keys(params, msg);
3246 if (ret)
3247 goto nla_put_failure;
3248
3249 if (params->wpa_ie) {
3250 wpa_hexdump(MSG_DEBUG,
3251 " * Extra IEs for Beacon/Probe Response frames",
3252 params->wpa_ie, params->wpa_ie_len);
3253 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3254 params->wpa_ie);
3255 }
3256
3257 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3258 msg = NULL;
3259 if (ret) {
3260 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3261 ret, strerror(-ret));
3262 count++;
3263 if (ret == -EALREADY && count == 1) {
3264 wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3265 "forced leave");
3266 nl80211_leave_ibss(drv);
3267 nlmsg_free(msg);
3268 goto retry;
3269 }
3270
3271 goto nla_put_failure;
3272 }
3273 ret = 0;
3274 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3275
3276 nla_put_failure:
3277 nlmsg_free(msg);
3278 return ret;
3279 }
3280
3281
3282 static int wpa_driver_nl80211_connect(
3283 struct wpa_driver_nl80211_data *drv,
3284 struct wpa_driver_associate_params *params)
3285 {
3286 struct nl_msg *msg;
3287 enum nl80211_auth_type type;
3288 int ret = 0;
3289
3290 msg = nlmsg_alloc();
3291 if (!msg)
3292 return -1;
3293
3294 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3295 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3296 NL80211_CMD_CONNECT, 0);
3297
3298 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3299 if (params->bssid) {
3300 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3301 MAC2STR(params->bssid));
3302 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3303 }
3304 if (params->freq) {
3305 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3306 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3307 }
3308 if (params->ssid) {
3309 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3310 params->ssid, params->ssid_len);
3311 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3312 params->ssid);
3313 if (params->ssid_len > sizeof(drv->ssid))
3314 goto nla_put_failure;
3315 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3316 drv->ssid_len = params->ssid_len;
3317 }
3318 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3319 if (params->wpa_ie)
3320 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3321 params->wpa_ie);
3322
3323 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3324 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3325 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3326 type = NL80211_AUTHTYPE_SHARED_KEY;
3327 else if (params->auth_alg & AUTH_ALG_LEAP)
3328 type = NL80211_AUTHTYPE_NETWORK_EAP;
3329 else if (params->auth_alg & AUTH_ALG_FT)
3330 type = NL80211_AUTHTYPE_FT;
3331 else
3332 goto nla_put_failure;
3333
3334 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3335 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3336
3337 if (params->wpa_ie && params->wpa_ie_len) {
3338 enum nl80211_wpa_versions ver;
3339
3340 if (params->wpa_ie[0] == WLAN_EID_RSN)
3341 ver = NL80211_WPA_VERSION_2;
3342 else
3343 ver = NL80211_WPA_VERSION_1;
3344
3345 wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
3346 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3347 }
3348
3349 if (params->pairwise_suite != CIPHER_NONE) {
3350 int cipher;
3351
3352 switch (params->pairwise_suite) {
3353 case CIPHER_WEP40:
3354 cipher = WLAN_CIPHER_SUITE_WEP40;
3355 break;
3356 case CIPHER_WEP104:
3357 cipher = WLAN_CIPHER_SUITE_WEP104;
3358 break;
3359 case CIPHER_CCMP:
3360 cipher = WLAN_CIPHER_SUITE_CCMP;
3361 break;
3362 case CIPHER_TKIP:
3363 default:
3364 cipher = WLAN_CIPHER_SUITE_TKIP;
3365 break;
3366 }
3367 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3368 }
3369
3370 if (params->group_suite != CIPHER_NONE) {
3371 int cipher;
3372
3373 switch (params->group_suite) {
3374 case CIPHER_WEP40:
3375 cipher = WLAN_CIPHER_SUITE_WEP40;
3376 break;
3377 case CIPHER_WEP104:
3378 cipher = WLAN_CIPHER_SUITE_WEP104;
3379 break;
3380 case CIPHER_CCMP:
3381 cipher = WLAN_CIPHER_SUITE_CCMP;
3382 break;
3383 case CIPHER_TKIP:
3384 default:
3385 cipher = WLAN_CIPHER_SUITE_TKIP;
3386 break;
3387 }
3388 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3389 }
3390
3391 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3392 params->key_mgmt_suite == KEY_MGMT_PSK) {
3393 int mgmt = WLAN_AKM_SUITE_PSK;
3394
3395 switch (params->key_mgmt_suite) {
3396 case KEY_MGMT_802_1X:
3397 mgmt = WLAN_AKM_SUITE_8021X;
3398 break;
3399 case KEY_MGMT_PSK:
3400 default:
3401 mgmt = WLAN_AKM_SUITE_PSK;
3402 break;
3403 }
3404 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3405 }
3406
3407 ret = nl80211_set_conn_keys(params, msg);
3408 if (ret)
3409 goto nla_put_failure;
3410
3411 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3412 msg = NULL;
3413 if (ret) {
3414 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3415 "(%s)", ret, strerror(-ret));
3416 goto nla_put_failure;
3417 }
3418 ret = 0;
3419 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3420
3421 nla_put_failure:
3422 nlmsg_free(msg);
3423 return ret;
3424
3425 }
3426
3427
3428 static int wpa_driver_nl80211_associate(
3429 void *priv, struct wpa_driver_associate_params *params)
3430 {
3431 struct wpa_driver_nl80211_data *drv = priv;
3432 int ret = -1;
3433 struct nl_msg *msg;
3434
3435 if (params->mode == IEEE80211_MODE_AP)
3436 return wpa_driver_nl80211_ap(drv, params);
3437
3438 if (params->mode == IEEE80211_MODE_IBSS)
3439 return wpa_driver_nl80211_ibss(drv, params);
3440
3441 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3442 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3443 return -1;
3444 return wpa_driver_nl80211_connect(drv, params);
3445 }
3446
3447 drv->associated = 0;
3448
3449 msg = nlmsg_alloc();
3450 if (!msg)
3451 return -1;
3452
3453 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3454 drv->ifindex);
3455 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3456 NL80211_CMD_ASSOCIATE, 0);
3457
3458 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3459 if (params->bssid) {
3460 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3461 MAC2STR(params->bssid));
3462 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3463 }
3464 if (params->freq) {
3465 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3466 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3467 }
3468 if (params->ssid) {
3469 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3470 params->ssid, params->ssid_len);
3471 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3472 params->ssid);
3473 if (params->ssid_len > sizeof(drv->ssid))
3474 goto nla_put_failure;
3475 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3476 drv->ssid_len = params->ssid_len;
3477 }
3478 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3479 if (params->wpa_ie)
3480 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3481 params->wpa_ie);
3482
3483 #ifdef CONFIG_IEEE80211W
3484 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3485 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3486 #endif /* CONFIG_IEEE80211W */
3487
3488 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3489
3490 if (params->prev_bssid) {
3491 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
3492 MAC2STR(params->prev_bssid));
3493 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3494 params->prev_bssid);
3495 }
3496
3497 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3498 msg = NULL;
3499 if (ret) {
3500 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3501 "(%s)", ret, strerror(-ret));
3502 goto nla_put_failure;
3503 }
3504 ret = 0;
3505 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3506 "successfully");
3507
3508 nla_put_failure:
3509 nlmsg_free(msg);
3510 return ret;
3511 }
3512
3513
3514 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3515 int ifindex, int mode)
3516 {
3517 struct nl_msg *msg;
3518 int ret = -ENOBUFS;
3519
3520 msg = nlmsg_alloc();
3521 if (!msg)
3522 return -ENOMEM;
3523
3524 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3525 0, NL80211_CMD_SET_INTERFACE, 0);
3526 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3527 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3528
3529 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3530 if (!ret)
3531 return 0;
3532 nla_put_failure:
3533 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3534 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3535 return ret;
3536 }
3537
3538
3539 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3540 {
3541 struct wpa_driver_nl80211_data *drv = priv;
3542 int ret = -1;
3543 int nlmode;
3544
3545 switch (mode) {
3546 case 0:
3547 nlmode = NL80211_IFTYPE_STATION;
3548 break;
3549 case 1:
3550 nlmode = NL80211_IFTYPE_ADHOC;
3551 break;
3552 case 2:
3553 nlmode = NL80211_IFTYPE_AP;
3554 break;
3555 default:
3556 return -1;
3557 }
3558
3559 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3560 drv->nlmode = nlmode;
3561 ret = 0;
3562 goto done;
3563 }
3564
3565 if (nlmode == drv->nlmode) {
3566 ret = 0;
3567 goto done; /* Already in the requested mode */
3568 }
3569
3570 /* mac80211 doesn't allow mode changes while the device is up, so
3571 * take the device down, try to set the mode again, and bring the
3572 * device back up.
3573 */
3574 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3575 /* Try to set the mode again while the interface is down */
3576 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3577 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3578 ret = -1;
3579 }
3580
3581 if (!ret)
3582 drv->nlmode = nlmode;
3583
3584 done:
3585 if (!ret && nlmode == NL80211_IFTYPE_AP) {
3586 /* Setup additional AP mode functionality if needed */
3587 if (drv->monitor_ifidx < 0 &&
3588 nl80211_create_monitor_interface(drv))
3589 return -1;
3590 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3591 /* Remove additional AP mode functionality */
3592 nl80211_remove_monitor_interface(drv);
3593 }
3594
3595 return ret;
3596 }
3597
3598
3599 static int wpa_driver_nl80211_get_capa(void *priv,
3600 struct wpa_driver_capa *capa)
3601 {
3602 struct wpa_driver_nl80211_data *drv = priv;
3603 if (!drv->has_capability)
3604 return -1;
3605 os_memcpy(capa, &drv->capa, sizeof(*capa));
3606 return 0;
3607 }
3608
3609
3610 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3611 {
3612 struct wpa_driver_nl80211_data *drv = priv;
3613
3614 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3615 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3616 drv->operstate = state;
3617 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3618 state ? IF_OPER_UP : IF_OPER_DORMANT);
3619 }
3620
3621
3622 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3623 {
3624 struct wpa_driver_nl80211_data *drv = priv;
3625 struct nl_msg *msg;
3626 struct nl80211_sta_flag_update upd;
3627
3628 msg = nlmsg_alloc();
3629 if (!msg)
3630 return -ENOMEM;
3631
3632 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3633 0, NL80211_CMD_SET_STATION, 0);
3634
3635 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3636 if_nametoindex(drv->ifname));
3637 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3638
3639 os_memset(&upd, 0, sizeof(upd));
3640 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3641 if (authorized)
3642 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3643 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3644
3645 return send_and_recv_msgs(drv, msg, NULL, NULL);
3646 nla_put_failure:
3647 return -ENOBUFS;
3648 }
3649
3650
3651 #ifdef HOSTAPD
3652
3653 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3654 int ifindex)
3655 {
3656 struct i802_bss *bss = &drv->bss;
3657 while (bss) {
3658 if (ifindex == bss->ifindex)
3659 return bss;
3660 bss = bss->next;
3661 }
3662 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3663 return NULL;
3664 }
3665
3666
3667 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3668 {
3669 int i;
3670 int *old;
3671
3672 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3673 ifidx);
3674 for (i = 0; i < drv->num_if_indices; i++) {
3675 if (drv->if_indices[i] == 0) {
3676 drv->if_indices[i] = ifidx;
3677 return;
3678 }
3679 }
3680
3681 if (drv->if_indices != drv->default_if_indices)
3682 old = drv->if_indices;
3683 else
3684 old = NULL;
3685
3686 drv->if_indices = realloc(old,
3687 sizeof(int) * (drv->num_if_indices + 1));
3688 if (!drv->if_indices) {
3689 if (!old)
3690 drv->if_indices = drv->default_if_indices;
3691 else
3692 drv->if_indices = old;
3693 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3694 "interfaces");
3695 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3696 return;
3697 }
3698 drv->if_indices[drv->num_if_indices] = ifidx;
3699 drv->num_if_indices++;
3700 }
3701
3702
3703 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3704 {
3705 int i;
3706
3707 for (i = 0; i < drv->num_if_indices; i++) {
3708 if (drv->if_indices[i] == ifidx) {
3709 drv->if_indices[i] = 0;
3710 break;
3711 }
3712 }
3713 }
3714
3715
3716 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3717 {
3718 int i;
3719
3720 for (i = 0; i < drv->num_if_indices; i++)
3721 if (drv->if_indices[i] == ifidx)
3722 return 1;
3723
3724 return 0;
3725 }
3726
3727
3728 static inline int min_int(int a, int b)
3729 {
3730 if (a < b)
3731 return a;
3732 return b;
3733 }
3734
3735
3736 static int get_key_handler(struct nl_msg *msg, void *arg)
3737 {
3738 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3739 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3740
3741 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3742 genlmsg_attrlen(gnlh, 0), NULL);
3743
3744 /*
3745 * TODO: validate the key index and mac address!
3746 * Otherwise, there's a race condition as soon as
3747 * the kernel starts sending key notifications.
3748 */
3749
3750 if (tb[NL80211_ATTR_KEY_SEQ])
3751 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3752 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3753 return NL_SKIP;
3754 }
3755
3756
3757 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3758 int idx, u8 *seq)
3759 {
3760 struct wpa_driver_nl80211_data *drv = priv;
3761 struct nl_msg *msg;
3762
3763 msg = nlmsg_alloc();
3764 if (!msg)
3765 return -ENOMEM;
3766
3767 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3768 0, NL80211_CMD_GET_KEY, 0);
3769
3770 if (addr)
3771 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3772 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3773 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3774
3775 memset(seq, 0, 6);
3776
3777 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3778 nla_put_failure:
3779 return -ENOBUFS;
3780 }
3781
3782
3783 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3784 int mode)
3785 {
3786 struct wpa_driver_nl80211_data *drv = priv;
3787 struct nl_msg *msg;
3788 u8 rates[NL80211_MAX_SUPP_RATES];
3789 u8 rates_len = 0;
3790 int i;
3791
3792 msg = nlmsg_alloc();
3793 if (!msg)
3794 return -ENOMEM;
3795
3796 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3797 NL80211_CMD_SET_BSS, 0);
3798
3799 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3800 rates[rates_len++] = basic_rates[i] / 5;
3801
3802 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3803
3804 /* TODO: multi-BSS support */
3805 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3806
3807 return send_and_recv_msgs(drv, msg, NULL, NULL);
3808 nla_put_failure:
3809 return -ENOBUFS;
3810 }
3811
3812
3813 /* Set kernel driver on given frequency (MHz) */
3814 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3815 {
3816 struct wpa_driver_nl80211_data *drv = priv;
3817 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3818 freq->sec_channel_offset);
3819 }
3820
3821
3822 static int i802_set_rts(void *priv, int rts)
3823 {
3824 struct wpa_driver_nl80211_data *drv = priv;
3825 struct nl_msg *msg;
3826 int ret = -ENOBUFS;
3827 u32 val;
3828
3829 msg = nlmsg_alloc();
3830 if (!msg)
3831 return -ENOMEM;
3832
3833 if (rts >= 2347)
3834 val = (u32) -1;
3835 else
3836 val = rts;
3837
3838 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3839 0, NL80211_CMD_SET_WIPHY, 0);
3840 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3841 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3842
3843 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3844 if (!ret)
3845 return 0;
3846 nla_put_failure:
3847 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3848 "%d (%s)", rts, ret, strerror(-ret));
3849 return ret;
3850 }
3851
3852
3853 static int i802_set_frag(void *priv, int frag)
3854 {
3855 struct wpa_driver_nl80211_data *drv = priv;
3856 struct nl_msg *msg;
3857 int ret = -ENOBUFS;
3858 u32 val;
3859
3860 msg = nlmsg_alloc();
3861 if (!msg)
3862 return -ENOMEM;
3863
3864 if (frag >= 2346)
3865 val = (u32) -1;
3866 else
3867 val = frag;
3868
3869 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3870 0, NL80211_CMD_SET_WIPHY, 0);
3871 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3872 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3873
3874 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3875 if (!ret)
3876 return 0;
3877 nla_put_failure:
3878 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3879 "%d: %d (%s)", frag, ret, strerror(-ret));
3880 return ret;
3881 }
3882
3883
3884 static int i802_flush(void *priv)
3885 {
3886 struct wpa_driver_nl80211_data *drv = priv;
3887 struct nl_msg *msg;
3888
3889 msg = nlmsg_alloc();
3890 if (!msg)
3891 return -1;
3892
3893 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3894 0, NL80211_CMD_DEL_STATION, 0);
3895
3896 /*
3897 * XXX: FIX! this needs to flush all VLANs too
3898 */
3899 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3900 if_nametoindex(drv->ifname));
3901
3902 return send_and_recv_msgs(drv, msg, NULL, NULL);
3903 nla_put_failure:
3904 return -ENOBUFS;
3905 }
3906
3907
3908 static int get_sta_handler(struct nl_msg *msg, void *arg)
3909 {
3910 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3911 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3912 struct hostap_sta_driver_data *data = arg;
3913 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3914 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3915 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3916 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3917 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3918 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3919 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3920 };
3921
3922 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3923 genlmsg_attrlen(gnlh, 0), NULL);
3924
3925 /*
3926 * TODO: validate the interface and mac address!
3927 * Otherwise, there's a race condition as soon as
3928 * the kernel starts sending station notifications.
3929 */
3930
3931 if (!tb[NL80211_ATTR_STA_INFO]) {
3932 wpa_printf(MSG_DEBUG, "sta stats missing!");
3933 return NL_SKIP;
3934 }
3935 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3936 tb[NL80211_ATTR_STA_INFO],
3937 stats_policy)) {
3938 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3939 return NL_SKIP;
3940 }
3941
3942 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3943 data->inactive_msec =
3944 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3945 if (stats[NL80211_STA_INFO_RX_BYTES])
3946 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3947 if (stats[NL80211_STA_INFO_TX_BYTES])
3948 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3949 if (stats[NL80211_STA_INFO_RX_PACKETS])
3950 data->rx_packets =
3951 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3952 if (stats[NL80211_STA_INFO_TX_PACKETS])
3953 data->tx_packets =
3954 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3955
3956 return NL_SKIP;
3957 }
3958
3959 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3960 const u8 *addr)
3961 {
3962 struct wpa_driver_nl80211_data *drv = priv;
3963 struct nl_msg *msg;
3964
3965 os_memset(data, 0, sizeof(*data));
3966 msg = nlmsg_alloc();
3967 if (!msg)
3968 return -ENOMEM;
3969
3970 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3971 0, NL80211_CMD_GET_STATION, 0);
3972
3973 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3974 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3975
3976 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3977 nla_put_failure:
3978 return -ENOBUFS;
3979 }
3980
3981
3982 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3983 int cw_min, int cw_max, int burst_time)
3984 {
3985 struct wpa_driver_nl80211_data *drv = priv;
3986 struct nl_msg *msg;
3987 struct nlattr *txq, *params;
3988
3989 msg = nlmsg_alloc();
3990 if (!msg)
3991 return -1;
3992
3993 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3994 0, NL80211_CMD_SET_WIPHY, 0);
3995
3996 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3997
3998 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3999 if (!txq)
4000 goto nla_put_failure;
4001
4002 /* We are only sending parameters for a single TXQ at a time */
4003 params = nla_nest_start(msg, 1);
4004 if (!params)
4005 goto nla_put_failure;
4006
4007 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4008 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4009 * 32 usec, so need to convert the value here. */
4010 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4011 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4012 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4013 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4014
4015 nla_nest_end(msg, params);
4016
4017 nla_nest_end(msg, txq);
4018
4019 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4020 return 0;
4021 nla_put_failure:
4022 return -1;
4023 }
4024
4025
4026 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4027 {
4028 struct wpa_driver_nl80211_data *drv = priv;
4029 struct nl_msg *msg;
4030
4031 msg = nlmsg_alloc();
4032 if (!msg)
4033 return -ENOMEM;
4034
4035 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4036 NL80211_CMD_SET_BSS, 0);
4037
4038 if (cts >= 0)
4039 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4040 if (preamble >= 0)
4041 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4042 if (slot >= 0)
4043 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4044
4045 /* TODO: multi-BSS support */
4046 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4047
4048 return send_and_recv_msgs(drv, msg, NULL, NULL);
4049 nla_put_failure:
4050 return -ENOBUFS;
4051 }
4052
4053
4054 static int i802_set_cts_protect(void *priv, int value)
4055 {
4056 return i802_set_bss(priv, value, -1, -1);
4057 }
4058
4059
4060 static int i802_set_preamble(void *priv, int value)
4061 {
4062 return i802_set_bss(priv, -1, value, -1);
4063 }
4064
4065
4066 static int i802_set_short_slot_time(void *priv, int value)
4067 {
4068 return i802_set_bss(priv, -1, -1, value);
4069 }
4070
4071
4072 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4073 const char *ifname, int vlan_id)
4074 {
4075 struct wpa_driver_nl80211_data *drv = priv;
4076 struct nl_msg *msg;
4077
4078 msg = nlmsg_alloc();
4079 if (!msg)
4080 return -ENOMEM;
4081
4082 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4083 0, NL80211_CMD_SET_STATION, 0);
4084
4085 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4086 if_nametoindex(drv->ifname));
4087 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4088 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4089 if_nametoindex(ifname));
4090
4091 return send_and_recv_msgs(drv, msg, NULL, NULL);
4092 nla_put_failure:
4093 return -ENOBUFS;
4094 }
4095
4096
4097 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4098 {
4099 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4100 struct sockaddr_ll lladdr;
4101 unsigned char buf[3000];
4102 int len;
4103 socklen_t fromlen = sizeof(lladdr);
4104
4105 len = recvfrom(sock, buf, sizeof(buf), 0,
4106 (struct sockaddr *)&lladdr, &fromlen);
4107 if (len < 0) {
4108 perror("recv");
4109 return;
4110 }
4111
4112 if (have_ifidx(drv, lladdr.sll_ifindex)) {
4113 void *ctx;
4114 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4115 if (!ctx)
4116 return;
4117 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4118 }
4119 }
4120
4121
4122 static int i802_get_inact_sec(void *priv, const u8 *addr)
4123 {
4124 struct hostap_sta_driver_data data;
4125 int ret;
4126
4127 data.inactive_msec = (unsigned long) -1;
4128 ret = i802_read_sta_data(priv, &data, addr);
4129 if (ret || data.inactive_msec == (unsigned long) -1)
4130 return -1;
4131 return data.inactive_msec / 1000;
4132 }
4133
4134
4135 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4136 {
4137 #if 0
4138 /* TODO */
4139 #endif
4140 return 0;
4141 }
4142
4143
4144 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4145 int reason)
4146 {
4147 struct wpa_driver_nl80211_data *drv = priv;
4148 struct ieee80211_mgmt mgmt;
4149
4150 memset(&mgmt, 0, sizeof(mgmt));
4151 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4152 WLAN_FC_STYPE_DEAUTH);
4153 memcpy(mgmt.da, addr, ETH_ALEN);
4154 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4155 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4156 mgmt.u.deauth.reason_code = host_to_le16(reason);
4157 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4158 IEEE80211_HDRLEN +
4159 sizeof(mgmt.u.deauth));
4160 }
4161
4162
4163 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4164 int reason)
4165 {
4166 struct wpa_driver_nl80211_data *drv = priv;
4167 struct ieee80211_mgmt mgmt;
4168
4169 memset(&mgmt, 0, sizeof(mgmt));
4170 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4171 WLAN_FC_STYPE_DISASSOC);
4172 memcpy(mgmt.da, addr, ETH_ALEN);
4173 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4174 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4175 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4176 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4177 IEEE80211_HDRLEN +
4178 sizeof(mgmt.u.disassoc));
4179 }
4180
4181
4182 static void *i802_init(struct hostapd_data *hapd,
4183 struct wpa_init_params *params)
4184 {
4185 struct wpa_driver_nl80211_data *drv;
4186 size_t i;
4187
4188 drv = wpa_driver_nl80211_init(hapd, params->ifname);
4189 if (drv == NULL)
4190 return NULL;
4191
4192 drv->bss.ifindex = drv->ifindex;
4193
4194 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4195 drv->if_indices = drv->default_if_indices;
4196 for (i = 0; i < params->num_bridge; i++) {
4197 if (params->bridge[i])
4198 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4199 }
4200
4201 /* start listening for EAPOL on the default AP interface */
4202 add_ifidx(drv, drv->ifindex);
4203
4204 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4205 goto failed;
4206
4207 if (params->bssid) {
4208 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4209 goto failed;
4210 }
4211
4212 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4213 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4214 "into AP mode", drv->ifname);
4215 goto failed;
4216 }
4217
4218 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4219 goto failed;
4220
4221 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4222 if (drv->eapol_sock < 0) {
4223 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4224 goto failed;
4225 }
4226
4227 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4228 {
4229 printf("Could not register read socket for eapol\n");
4230 goto failed;
4231 }
4232
4233 if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4234 goto failed;
4235
4236 return drv;
4237
4238 failed:
4239 nl80211_remove_monitor_interface(drv);
4240 if (drv->ioctl_sock >= 0)
4241 close(drv->ioctl_sock);
4242
4243 genl_family_put(drv->nl80211);
4244 nl_cache_free(drv->nl_cache);
4245 nl_handle_destroy(drv->nl_handle);
4246 nl_cb_put(drv->nl_cb);
4247
4248 os_free(drv);
4249 return NULL;
4250 }
4251
4252
4253 static void i802_deinit(void *priv)
4254 {
4255 wpa_driver_nl80211_deinit(priv);
4256 }
4257
4258 #endif /* HOSTAPD */
4259
4260
4261 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4262 enum wpa_driver_if_type type)
4263 {
4264 switch (type) {
4265 case WPA_IF_STATION:
4266 return NL80211_IFTYPE_STATION;
4267 case WPA_IF_AP_VLAN:
4268 return NL80211_IFTYPE_AP_VLAN;
4269 case WPA_IF_AP_BSS:
4270 return NL80211_IFTYPE_AP;
4271 }
4272 return -1;
4273 }
4274
4275
4276 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4277 enum wpa_driver_if_type type,
4278 const char *ifname, const u8 *addr,
4279 void *bss_ctx)
4280 {
4281 struct wpa_driver_nl80211_data *drv = priv;
4282 int ifidx;
4283 #ifdef HOSTAPD
4284 struct i802_bss *bss = NULL;
4285
4286 if (type == WPA_IF_AP_BSS) {
4287 bss = os_zalloc(sizeof(*bss));
4288 if (bss == NULL)
4289 return -1;
4290 }
4291 #endif /* HOSTAPD */
4292
4293 ifidx = nl80211_create_iface(drv, ifname,
4294 wpa_driver_nl80211_if_type(type), addr);
4295 if (ifidx < 0) {
4296 #ifdef HOSTAPD
4297 os_free(bss);
4298 #endif /* HOSTAPD */
4299 return -1;
4300 }
4301
4302 #ifdef HOSTAPD
4303 if (type == WPA_IF_AP_BSS) {
4304 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4305 nl80211_remove_iface(priv, ifidx);
4306 os_free(bss);
4307 return -1;
4308 }
4309 bss->ifindex = ifidx;
4310 bss->next = drv->bss.next;
4311 drv->bss.next = bss;
4312 }
4313 #endif /* HOSTAPD */
4314
4315 return 0;
4316 }
4317
4318
4319 static int wpa_driver_nl80211_if_remove(void *priv,
4320 enum wpa_driver_if_type type,
4321 const char *ifname)
4322 {
4323 struct wpa_driver_nl80211_data *drv = priv;
4324 int ifindex = if_nametoindex(ifname);
4325
4326 nl80211_remove_iface(drv, ifindex);
4327
4328 #ifdef HOSTAPD
4329 if (type == WPA_IF_AP_BSS) {
4330 struct i802_bss *bss, *prev;
4331 prev = &drv->bss;
4332 bss = drv->bss.next;
4333 while (bss) {
4334 if (ifindex == bss->ifindex) {
4335 prev->next = bss->next;
4336 os_free(bss);
4337 break;
4338 }
4339 prev = bss;
4340 bss = bss->next;
4341 }
4342 }
4343 #endif /* HOSTAPD */
4344
4345 return 0;
4346 }
4347
4348
4349 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4350 .name = "nl80211",
4351 .desc = "Linux nl80211/cfg80211",
4352 .get_bssid = wpa_driver_nl80211_get_bssid,
4353 .get_ssid = wpa_driver_nl80211_get_ssid,
4354 .set_key = wpa_driver_nl80211_set_key,
4355 .scan2 = wpa_driver_nl80211_scan,
4356 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4357 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4358 .disassociate = wpa_driver_nl80211_disassociate,
4359 .authenticate = wpa_driver_nl80211_authenticate,
4360 .associate = wpa_driver_nl80211_associate,
4361 .init = wpa_driver_nl80211_init,
4362 .deinit = wpa_driver_nl80211_deinit,
4363 .get_capa = wpa_driver_nl80211_get_capa,
4364 .set_operstate = wpa_driver_nl80211_set_operstate,
4365 .set_supp_port = wpa_driver_nl80211_set_supp_port,
4366 .set_country = wpa_driver_nl80211_set_country,
4367 .set_beacon = wpa_driver_nl80211_set_beacon,
4368 .if_add = wpa_driver_nl80211_if_add,
4369 .if_remove = wpa_driver_nl80211_if_remove,
4370 .send_mlme = wpa_driver_nl80211_send_mlme,
4371 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4372 .sta_add = wpa_driver_nl80211_sta_add,
4373 .sta_remove = wpa_driver_nl80211_sta_remove,
4374 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4375 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4376 #ifdef HOSTAPD
4377 .hapd_init = i802_init,
4378 .hapd_deinit = i802_deinit,
4379 .get_seqnum = i802_get_seqnum,
4380 .flush = i802_flush,
4381 .read_sta_data = i802_read_sta_data,
4382 .sta_deauth = i802_sta_deauth,
4383 .sta_disassoc = i802_sta_disassoc,
4384 .get_inact_sec = i802_get_inact_sec,
4385 .sta_clear_stats = i802_sta_clear_stats,
4386 .set_freq = i802_set_freq,
4387 .set_rts = i802_set_rts,
4388 .set_frag = i802_set_frag,
4389 .set_rate_sets = i802_set_rate_sets,
4390 .set_cts_protect = i802_set_cts_protect,
4391 .set_preamble = i802_set_preamble,
4392 .set_short_slot_time = i802_set_short_slot_time,
4393 .set_tx_queue_params = i802_set_tx_queue_params,
4394 .set_sta_vlan = i802_set_sta_vlan,
4395 #endif /* HOSTAPD */
4396 };
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