?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Allow Probe Request callbacks to terminate iteration
[hostap-gosc2009.git] / src / drivers / driver_nl80211.c
blobce6bedc70150ffda155b9dff5bc68c6406be5dc1
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 static int wpa_driver_nl80211_if_remove(void *priv,
132 enum wpa_driver_if_type type,
133 const char *ifname);
134 #endif /* HOSTAPD */
135
136
137 /* nl80211 code */
138 static int ack_handler(struct nl_msg *msg, void *arg)
139 {
140 int *err = arg;
141 *err = 0;
142 return NL_STOP;
143 }
144
145 static int finish_handler(struct nl_msg *msg, void *arg)
146 {
147 int *ret = arg;
148 *ret = 0;
149 return NL_SKIP;
150 }
151
152 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
153 void *arg)
154 {
155 int *ret = arg;
156 *ret = err->error;
157 return NL_SKIP;
158 }
159
160
161 static int no_seq_check(struct nl_msg *msg, void *arg)
162 {
163 return NL_OK;
164 }
165
166
167 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
168 struct nl_msg *msg,
169 int (*valid_handler)(struct nl_msg *, void *),
170 void *valid_data)
171 {
172 struct nl_cb *cb;
173 int err = -ENOMEM;
174
175 cb = nl_cb_clone(drv->nl_cb);
176 if (!cb)
177 goto out;
178
179 err = nl_send_auto_complete(drv->nl_handle, msg);
180 if (err < 0)
181 goto out;
182
183 err = 1;
184
185 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
186 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
187 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
188
189 if (valid_handler)
190 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
191 valid_handler, valid_data);
192
193 while (err > 0)
194 nl_recvmsgs(drv->nl_handle, cb);
195 out:
196 nl_cb_put(cb);
197 nlmsg_free(msg);
198 return err;
199 }
200
201
202 struct family_data {
203 const char *group;
204 int id;
205 };
206
207
208 static int family_handler(struct nl_msg *msg, void *arg)
209 {
210 struct family_data *res = arg;
211 struct nlattr *tb[CTRL_ATTR_MAX + 1];
212 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
213 struct nlattr *mcgrp;
214 int i;
215
216 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
217 genlmsg_attrlen(gnlh, 0), NULL);
218 if (!tb[CTRL_ATTR_MCAST_GROUPS])
219 return NL_SKIP;
220
221 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
222 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
223 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
224 nla_len(mcgrp), NULL);
225 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
226 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
227 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
228 res->group,
229 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
230 continue;
231 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
232 break;
233 };
234
235 return NL_SKIP;
236 }
237
238
239 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
240 const char *family, const char *group)
241 {
242 struct nl_msg *msg;
243 int ret = -1;
244 struct family_data res = { group, -ENOENT };
245
246 msg = nlmsg_alloc();
247 if (!msg)
248 return -ENOMEM;
249 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
250 0, 0, CTRL_CMD_GETFAMILY, 0);
251 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
252
253 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
254 msg = NULL;
255 if (ret == 0)
256 ret = res.id;
257
258 nla_put_failure:
259 nlmsg_free(msg);
260 return ret;
261 }
262
263
264 #ifdef HOSTAPD
265 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
266 const char *ifname, u8 *addr)
267 {
268 struct ifreq ifr;
269
270 os_memset(&ifr, 0, sizeof(ifr));
271 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
272 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
273 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
274 ifname, errno, strerror(errno));
275 return -1;
276 }
277
278 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
279 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
280 ifname, ifr.ifr_hwaddr.sa_family);
281 return -1;
282 }
283 os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
284
285 return 0;
286 }
287
288
289 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
290 const char *ifname, const u8 *addr)
291 {
292 struct ifreq ifr;
293
294 os_memset(&ifr, 0, sizeof(ifr));
295 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
296 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
297 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
298
299 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
300 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
301 ifname, errno, strerror(errno));
302 return -1;
303 }
304
305 return 0;
306 }
307 #endif /* HOSTAPD */
308
309
310 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
311 {
312 struct wpa_driver_nl80211_data *drv = priv;
313 if (!drv->associated)
314 return -1;
315 os_memcpy(bssid, drv->bssid, ETH_ALEN);
316 return 0;
317 }
318
319
320 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
321 {
322 struct wpa_driver_nl80211_data *drv = priv;
323 if (!drv->associated)
324 return -1;
325 os_memcpy(ssid, drv->ssid, drv->ssid_len);
326 return drv->ssid_len;
327 }
328
329
330 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
331 char *buf, size_t len, int del)
332 {
333 union wpa_event_data event;
334
335 os_memset(&event, 0, sizeof(event));
336 if (len > sizeof(event.interface_status.ifname))
337 len = sizeof(event.interface_status.ifname) - 1;
338 os_memcpy(event.interface_status.ifname, buf, len);
339 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
340 EVENT_INTERFACE_ADDED;
341
342 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
343 del ? "DEL" : "NEW",
344 event.interface_status.ifname,
345 del ? "removed" : "added");
346
347 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
348 if (del)
349 drv->if_removed = 1;
350 else
351 drv->if_removed = 0;
352 }
353
354 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
355 }
356
357
358 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
359 u8 *buf, size_t len)
360 {
361 int attrlen, rta_len;
362 struct rtattr *attr;
363
364 attrlen = len;
365 attr = (struct rtattr *) buf;
366
367 rta_len = RTA_ALIGN(sizeof(struct rtattr));
368 while (RTA_OK(attr, attrlen)) {
369 if (attr->rta_type == IFLA_IFNAME) {
370 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
371 == 0)
372 return 1;
373 else
374 break;
375 }
376 attr = RTA_NEXT(attr, attrlen);
377 }
378
379 return 0;
380 }
381
382
383 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
384 int ifindex, u8 *buf, size_t len)
385 {
386 if (drv->ifindex == ifindex)
387 return 1;
388
389 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
390 drv->ifindex = if_nametoindex(drv->ifname);
391 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
392 "interface");
393 wpa_driver_nl80211_finish_drv_init(drv);
394 return 1;
395 }
396
397 return 0;
398 }
399
400
401 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
402 struct ifinfomsg *ifi,
403 u8 *buf, size_t len)
404 {
405 struct wpa_driver_nl80211_data *drv = ctx;
406 int attrlen, rta_len;
407 struct rtattr *attr;
408
409 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
410 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
411 ifi->ifi_index);
412 return;
413 }
414
415 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
416 "(%s%s%s%s)",
417 drv->operstate, ifi->ifi_flags,
418 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
419 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
420 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
421 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
422 /*
423 * Some drivers send the association event before the operup event--in
424 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
425 * fails. This will hit us when wpa_supplicant does not need to do
426 * IEEE 802.1X authentication
427 */
428 if (drv->operstate == 1 &&
429 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
430 !(ifi->ifi_flags & IFF_RUNNING))
431 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
432 -1, IF_OPER_UP);
433
434 attrlen = len;
435 attr = (struct rtattr *) buf;
436 rta_len = RTA_ALIGN(sizeof(struct rtattr));
437 while (RTA_OK(attr, attrlen)) {
438 if (attr->rta_type == IFLA_IFNAME) {
439 wpa_driver_nl80211_event_link(
440 drv,
441 ((char *) attr) + rta_len,
442 attr->rta_len - rta_len, 0);
443 }
444 attr = RTA_NEXT(attr, attrlen);
445 }
446 }
447
448
449 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
450 struct ifinfomsg *ifi,
451 u8 *buf, size_t len)
452 {
453 struct wpa_driver_nl80211_data *drv = ctx;
454 int attrlen, rta_len;
455 struct rtattr *attr;
456
457 attrlen = len;
458 attr = (struct rtattr *) buf;
459
460 rta_len = RTA_ALIGN(sizeof(struct rtattr));
461 while (RTA_OK(attr, attrlen)) {
462 if (attr->rta_type == IFLA_IFNAME) {
463 wpa_driver_nl80211_event_link(
464 drv,
465 ((char *) attr) + rta_len,
466 attr->rta_len - rta_len, 1);
467 }
468 attr = RTA_NEXT(attr, attrlen);
469 }
470 }
471
472
473 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
474 const u8 *frame, size_t len)
475 {
476 const struct ieee80211_mgmt *mgmt;
477 union wpa_event_data event;
478
479 mgmt = (const struct ieee80211_mgmt *) frame;
480 if (len < 24 + sizeof(mgmt->u.auth)) {
481 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
482 "frame");
483 return;
484 }
485
486 os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
487 os_memset(&event, 0, sizeof(event));
488 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
489 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
490 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
491 if (len > 24 + sizeof(mgmt->u.auth)) {
492 event.auth.ies = mgmt->u.auth.variable;
493 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
494 }
495
496 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
497 }
498
499
500 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
501 const u8 *frame, size_t len)
502 {
503 const struct ieee80211_mgmt *mgmt;
504 union wpa_event_data event;
505 u16 status;
506
507 mgmt = (const struct ieee80211_mgmt *) frame;
508 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
509 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
510 "frame");
511 return;
512 }
513
514 status = le_to_host16(mgmt->u.assoc_resp.status_code);
515 if (status != WLAN_STATUS_SUCCESS) {
516 os_memset(&event, 0, sizeof(event));
517 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
518 event.assoc_reject.resp_ies =
519 (u8 *) mgmt->u.assoc_resp.variable;
520 event.assoc_reject.resp_ies_len =
521 len - 24 - sizeof(mgmt->u.assoc_resp);
522 }
523 event.assoc_reject.status_code = status;
524
525 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
526 return;
527 }
528
529 drv->associated = 1;
530 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
531
532 os_memset(&event, 0, sizeof(event));
533 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
534 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
535 event.assoc_info.resp_ies_len =
536 len - 24 - sizeof(mgmt->u.assoc_resp);
537 }
538
539 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
540 }
541
542
543 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
544 enum nl80211_commands cmd, struct nlattr *status,
545 struct nlattr *addr, struct nlattr *req_ie,
546 struct nlattr *resp_ie)
547 {
548 union wpa_event_data event;
549
550 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
551 /*
552 * Avoid reporting two association events that would confuse
553 * the core code.
554 */
555 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
556 "when using userspace SME", cmd);
557 return;
558 }
559
560 os_memset(&event, 0, sizeof(event));
561 if (cmd == NL80211_CMD_CONNECT &&
562 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
563 if (resp_ie) {
564 event.assoc_reject.resp_ies = nla_data(resp_ie);
565 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
566 }
567 event.assoc_reject.status_code = nla_get_u16(status);
568 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
569 return;
570 }
571
572 drv->associated = 1;
573 if (addr)
574 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
575
576 if (req_ie) {
577 event.assoc_info.req_ies = nla_data(req_ie);
578 event.assoc_info.req_ies_len = nla_len(req_ie);
579 }
580 if (resp_ie) {
581 event.assoc_info.resp_ies = nla_data(resp_ie);
582 event.assoc_info.resp_ies_len = nla_len(resp_ie);
583 }
584
585 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
586 }
587
588
589 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
590 enum nl80211_commands cmd, struct nlattr *addr)
591 {
592 union wpa_event_data event;
593 enum wpa_event_type ev;
594
595 if (nla_len(addr) != ETH_ALEN)
596 return;
597
598 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
599 cmd, MAC2STR((u8 *) nla_data(addr)));
600
601 if (cmd == NL80211_CMD_AUTHENTICATE)
602 ev = EVENT_AUTH_TIMED_OUT;
603 else if (cmd == NL80211_CMD_ASSOCIATE)
604 ev = EVENT_ASSOC_TIMED_OUT;
605 else
606 return;
607
608 os_memset(&event, 0, sizeof(event));
609 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
610 wpa_supplicant_event(drv->ctx, ev, &event);
611 }
612
613
614 static void mlme_event(struct wpa_driver_nl80211_data *drv,
615 enum nl80211_commands cmd, struct nlattr *frame,
616 struct nlattr *addr, struct nlattr *timed_out)
617 {
618 if (timed_out && addr) {
619 mlme_timeout_event(drv, cmd, addr);
620 return;
621 }
622
623 if (frame == NULL) {
624 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
625 "data", cmd);
626 return;
627 }
628
629 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
630 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
631 nla_data(frame), nla_len(frame));
632
633 switch (cmd) {
634 case NL80211_CMD_AUTHENTICATE:
635 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
636 break;
637 case NL80211_CMD_ASSOCIATE:
638 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
639 break;
640 case NL80211_CMD_DEAUTHENTICATE:
641 drv->associated = 0;
642 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
643 break;
644 case NL80211_CMD_DISASSOCIATE:
645 drv->associated = 0;
646 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
647 break;
648 default:
649 break;
650 }
651 }
652
653
654 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
655 struct nlattr *tb[])
656 {
657 union wpa_event_data data;
658
659 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
660 os_memset(&data, 0, sizeof(data));
661 if (tb[NL80211_ATTR_MAC]) {
662 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
663 nla_data(tb[NL80211_ATTR_MAC]),
664 nla_len(tb[NL80211_ATTR_MAC]));
665 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
666 }
667 if (tb[NL80211_ATTR_KEY_SEQ]) {
668 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
669 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
670 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
671 }
672 if (tb[NL80211_ATTR_KEY_TYPE]) {
673 enum nl80211_key_type key_type =
674 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
675 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
676 if (key_type == NL80211_KEYTYPE_PAIRWISE)
677 data.michael_mic_failure.unicast = 1;
678 } else
679 data.michael_mic_failure.unicast = 1;
680
681 if (tb[NL80211_ATTR_KEY_IDX]) {
682 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
683 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
684 }
685
686 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
687 }
688
689
690 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
691 struct nlattr *tb[])
692 {
693 if (tb[NL80211_ATTR_MAC] == NULL) {
694 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
695 "event");
696 return;
697 }
698 os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
699 drv->associated = 1;
700 wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
701 MAC2STR(drv->bssid));
702
703 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
704 }
705
706
707 static int process_event(struct nl_msg *msg, void *arg)
708 {
709 struct wpa_driver_nl80211_data *drv = arg;
710 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
711 struct nlattr *tb[NL80211_ATTR_MAX + 1];
712
713 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
714 genlmsg_attrlen(gnlh, 0), NULL);
715
716 if (tb[NL80211_ATTR_IFINDEX]) {
717 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
718 if (ifindex != drv->ifindex) {
719 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
720 " for foreign interface (ifindex %d)",
721 gnlh->cmd, ifindex);
722 return NL_SKIP;
723 }
724 }
725
726 if (drv->ap_scan_as_station &&
727 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
728 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
729 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
730 drv->ap_scan_as_station = 0;
731 }
732
733 switch (gnlh->cmd) {
734 case NL80211_CMD_TRIGGER_SCAN:
735 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
736 break;
737 case NL80211_CMD_NEW_SCAN_RESULTS:
738 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
739 drv->scan_complete_events = 1;
740 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
741 drv->ctx);
742 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
743 break;
744 case NL80211_CMD_SCAN_ABORTED:
745 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
746 /*
747 * Need to indicate that scan results are available in order
748 * not to make wpa_supplicant stop its scanning.
749 */
750 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
751 drv->ctx);
752 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
753 break;
754 case NL80211_CMD_AUTHENTICATE:
755 case NL80211_CMD_ASSOCIATE:
756 case NL80211_CMD_DEAUTHENTICATE:
757 case NL80211_CMD_DISASSOCIATE:
758 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
759 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
760 break;
761 case NL80211_CMD_CONNECT:
762 case NL80211_CMD_ROAM:
763 mlme_event_connect(drv, gnlh->cmd,
764 tb[NL80211_ATTR_STATUS_CODE],
765 tb[NL80211_ATTR_MAC],
766 tb[NL80211_ATTR_REQ_IE],
767 tb[NL80211_ATTR_RESP_IE]);
768 break;
769 case NL80211_CMD_DISCONNECT:
770 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
771 /*
772 * Avoid reporting two disassociation events that could
773 * confuse the core code.
774 */
775 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
776 "event when using userspace SME");
777 break;
778 }
779 drv->associated = 0;
780 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
781 break;
782 case NL80211_CMD_MICHAEL_MIC_FAILURE:
783 mlme_event_michael_mic_failure(drv, tb);
784 break;
785 case NL80211_CMD_JOIN_IBSS:
786 mlme_event_join_ibss(drv, tb);
787 break;
788 default:
789 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
790 "(cmd=%d)", gnlh->cmd);
791 break;
792 }
793
794 return NL_SKIP;
795 }
796
797
798 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
799 void *sock_ctx)
800 {
801 struct nl_cb *cb;
802 struct wpa_driver_nl80211_data *drv = eloop_ctx;
803
804 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
805
806 cb = nl_cb_clone(drv->nl_cb);
807 if (!cb)
808 return;
809 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
810 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
811 nl_recvmsgs(drv->nl_handle_event, cb);
812 nl_cb_put(cb);
813 }
814
815
816 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
817 const char *ifname, int dev_up)
818 {
819 struct ifreq ifr;
820
821 if (drv->ioctl_sock < 0)
822 return -1;
823
824 os_memset(&ifr, 0, sizeof(ifr));
825 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
826
827 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
828 perror("ioctl[SIOCGIFFLAGS]");
829 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
830 ifname);
831 return -1;
832 }
833
834 if (dev_up) {
835 if (ifr.ifr_flags & IFF_UP)
836 return 0;
837 ifr.ifr_flags |= IFF_UP;
838 } else {
839 if (!(ifr.ifr_flags & IFF_UP))
840 return 0;
841 ifr.ifr_flags &= ~IFF_UP;
842 }
843
844 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
845 perror("ioctl[SIOCSIFFLAGS]");
846 return -1;
847 }
848
849 return 0;
850 }
851
852
853 /**
854 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
855 * @priv: driver_nl80211 private data
856 * @alpha2_arg: country to which to switch to
857 * Returns: 0 on success, -1 on failure
858 *
859 * This asks nl80211 to set the regulatory domain for given
860 * country ISO / IEC alpha2.
861 */
862 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
863 {
864 struct wpa_driver_nl80211_data *drv = priv;
865 char alpha2[3];
866 struct nl_msg *msg;
867
868 msg = nlmsg_alloc();
869 if (!msg)
870 return -ENOMEM;
871
872 alpha2[0] = alpha2_arg[0];
873 alpha2[1] = alpha2_arg[1];
874 alpha2[2] = '\0';
875
876 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
877 0, NL80211_CMD_REQ_SET_REG, 0);
878
879 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
880 if (send_and_recv_msgs(drv, msg, NULL, NULL))
881 return -EINVAL;
882 return 0;
883 nla_put_failure:
884 return -EINVAL;
885 }
886
887
888 #ifndef HOSTAPD
889 struct wiphy_info_data {
890 int max_scan_ssids;
891 int ap_supported;
892 int auth_supported;
893 int connect_supported;
894 };
895
896
897 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
898 {
899 struct nlattr *tb[NL80211_ATTR_MAX + 1];
900 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
901 struct wiphy_info_data *info = arg;
902
903 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
904 genlmsg_attrlen(gnlh, 0), NULL);
905
906 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
907 info->max_scan_ssids =
908 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
909
910 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
911 struct nlattr *nl_mode;
912 int i;
913 nla_for_each_nested(nl_mode,
914 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
915 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
916 info->ap_supported = 1;
917 break;
918 }
919 }
920 }
921
922 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
923 struct nlattr *nl_cmd;
924 int i;
925
926 nla_for_each_nested(nl_cmd,
927 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
928 u32 cmd = nla_get_u32(nl_cmd);
929 if (cmd == NL80211_CMD_AUTHENTICATE)
930 info->auth_supported = 1;
931 else if (cmd == NL80211_CMD_CONNECT)
932 info->connect_supported = 1;
933 }
934 }
935
936 return NL_SKIP;
937 }
938
939
940 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
941 struct wiphy_info_data *info)
942 {
943 struct nl_msg *msg;
944
945 os_memset(info, 0, sizeof(*info));
946 msg = nlmsg_alloc();
947 if (!msg)
948 return -1;
949
950 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
951 0, NL80211_CMD_GET_WIPHY, 0);
952
953 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
954
955 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
956 return 0;
957 msg = NULL;
958 nla_put_failure:
959 nlmsg_free(msg);
960 return -1;
961 }
962
963
964 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
965 {
966 struct wiphy_info_data info;
967 if (wpa_driver_nl80211_get_info(drv, &info))
968 return -1;
969 drv->has_capability = 1;
970 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
971 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
972 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
973 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
974 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
975 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
976 WPA_DRIVER_CAPA_ENC_WEP104 |
977 WPA_DRIVER_CAPA_ENC_TKIP |
978 WPA_DRIVER_CAPA_ENC_CCMP;
979
980 drv->capa.max_scan_ssids = info.max_scan_ssids;
981 if (info.ap_supported)
982 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
983
984 if (info.auth_supported)
985 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
986 else if (!info.connect_supported) {
987 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
988 "authentication/association or connect commands");
989 return -1;
990 }
991
992 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
993
994 return 0;
995 }
996 #endif /* HOSTAPD */
997
998
999 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1000 void *ctx)
1001 {
1002 int ret;
1003
1004 /* Initialize generic netlink and nl80211 */
1005
1006 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1007 if (drv->nl_cb == NULL) {
1008 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1009 "callbacks");
1010 goto err1;
1011 }
1012
1013 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1014 if (drv->nl_handle == NULL) {
1015 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1016 "callbacks");
1017 goto err2;
1018 }
1019
1020 drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1021 if (drv->nl_handle_event == NULL) {
1022 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1023 "callbacks (event)");
1024 goto err2b;
1025 }
1026
1027 if (genl_connect(drv->nl_handle)) {
1028 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1029 "netlink");
1030 goto err3;
1031 }
1032
1033 if (genl_connect(drv->nl_handle_event)) {
1034 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1035 "netlink (event)");
1036 goto err3;
1037 }
1038
1039 #ifdef CONFIG_LIBNL20
1040 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1041 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1042 "netlink cache");
1043 goto err3;
1044 }
1045 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1046 0) {
1047 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1048 "netlink cache (event)");
1049 goto err3b;
1050 }
1051 #else /* CONFIG_LIBNL20 */
1052 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1053 if (drv->nl_cache == NULL) {
1054 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1055 "netlink cache");
1056 goto err3;
1057 }
1058 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1059 if (drv->nl_cache_event == NULL) {
1060 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1061 "netlink cache (event)");
1062 goto err3b;
1063 }
1064 #endif /* CONFIG_LIBNL20 */
1065
1066 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1067 if (drv->nl80211 == NULL) {
1068 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1069 "found");
1070 goto err4;
1071 }
1072
1073 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1074 if (ret >= 0)
1075 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1076 if (ret < 0) {
1077 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1078 "membership for scan events: %d (%s)",
1079 ret, strerror(-ret));
1080 goto err4;
1081 }
1082
1083 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1084 if (ret >= 0)
1085 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1086 if (ret < 0) {
1087 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1088 "membership for mlme events: %d (%s)",
1089 ret, strerror(-ret));
1090 goto err4;
1091 }
1092
1093 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1094 wpa_driver_nl80211_event_receive, drv, ctx);
1095
1096 return 0;
1097
1098 err4:
1099 nl_cache_free(drv->nl_cache_event);
1100 err3b:
1101 nl_cache_free(drv->nl_cache);
1102 err3:
1103 nl_handle_destroy(drv->nl_handle_event);
1104 err2b:
1105 nl_handle_destroy(drv->nl_handle);
1106 err2:
1107 nl_cb_put(drv->nl_cb);
1108 err1:
1109 return -1;
1110 }
1111
1112
1113 /**
1114 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1115 * @ctx: context to be used when calling wpa_supplicant functions,
1116 * e.g., wpa_supplicant_event()
1117 * @ifname: interface name, e.g., wlan0
1118 * Returns: Pointer to private data, %NULL on failure
1119 */
1120 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1121 {
1122 struct wpa_driver_nl80211_data *drv;
1123 struct netlink_config *cfg;
1124
1125 drv = os_zalloc(sizeof(*drv));
1126 if (drv == NULL)
1127 return NULL;
1128 drv->ctx = ctx;
1129 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1130 drv->monitor_ifidx = -1;
1131 drv->monitor_sock = -1;
1132 drv->ioctl_sock = -1;
1133
1134 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1135 os_free(drv);
1136 return NULL;
1137 }
1138
1139 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1140 if (drv->ioctl_sock < 0) {
1141 perror("socket(PF_INET,SOCK_DGRAM)");
1142 goto failed;
1143 }
1144
1145 cfg = os_zalloc(sizeof(*cfg));
1146 if (cfg == NULL)
1147 goto failed;
1148 cfg->ctx = drv;
1149 cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1150 cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1151 drv->netlink = netlink_init(cfg);
1152 if (drv->netlink == NULL) {
1153 os_free(cfg);
1154 goto failed;
1155 }
1156 if (wpa_driver_nl80211_finish_drv_init(drv))
1157 goto failed;
1158
1159 return drv;
1160
1161 failed:
1162 netlink_deinit(drv->netlink);
1163 if (drv->ioctl_sock >= 0)
1164 close(drv->ioctl_sock);
1165
1166 genl_family_put(drv->nl80211);
1167 nl_cache_free(drv->nl_cache);
1168 nl_handle_destroy(drv->nl_handle);
1169 nl_cb_put(drv->nl_cb);
1170
1171 os_free(drv);
1172 return NULL;
1173 }
1174
1175
1176 static int
1177 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1178 {
1179 drv->ifindex = if_nametoindex(drv->ifname);
1180
1181 #ifndef HOSTAPD
1182 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1183 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1184 "use managed mode");
1185 }
1186
1187 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1188 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1189 "UP", drv->ifname);
1190 return -1;
1191 }
1192
1193 if (wpa_driver_nl80211_capa(drv))
1194 return -1;
1195
1196 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1197 1, IF_OPER_DORMANT);
1198 #endif /* HOSTAPD */
1199
1200 return 0;
1201 }
1202
1203
1204 #ifdef HOSTAPD
1205 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1206 {
1207 struct i802_bss *bss, *prev;
1208 bss = drv->bss.next;
1209 while (bss) {
1210 prev = bss;
1211 bss = bss->next;
1212 os_free(bss);
1213 }
1214 }
1215 #endif /* HOSTAPD */
1216
1217
1218 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1219 {
1220 struct nl_msg *msg;
1221
1222 msg = nlmsg_alloc();
1223 if (!msg)
1224 return -ENOMEM;
1225
1226 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1227 0, NL80211_CMD_DEL_BEACON, 0);
1228 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1229
1230 return send_and_recv_msgs(drv, msg, NULL, NULL);
1231 nla_put_failure:
1232 return -ENOBUFS;
1233 }
1234
1235
1236 /**
1237 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1238 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1239 *
1240 * Shut down driver interface and processing of driver events. Free
1241 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1242 */
1243 static void wpa_driver_nl80211_deinit(void *priv)
1244 {
1245 struct wpa_driver_nl80211_data *drv = priv;
1246
1247 nl80211_remove_monitor_interface(drv);
1248 if (drv->monitor_sock >= 0) {
1249 eloop_unregister_read_sock(drv->monitor_sock);
1250 close(drv->monitor_sock);
1251 }
1252
1253 if (drv->nlmode == NL80211_IFTYPE_AP)
1254 wpa_driver_nl80211_del_beacon(drv);
1255
1256 #ifdef HOSTAPD
1257 if (drv->last_freq_ht) {
1258 /* Clear HT flags from the driver */
1259 struct hostapd_freq_params freq;
1260 os_memset(&freq, 0, sizeof(freq));
1261 freq.freq = drv->last_freq;
1262 i802_set_freq(priv, &freq);
1263 }
1264
1265 if (drv->eapol_sock >= 0) {
1266 eloop_unregister_read_sock(drv->eapol_sock);
1267 close(drv->eapol_sock);
1268 }
1269
1270 if (drv->if_indices != drv->default_if_indices)
1271 os_free(drv->if_indices);
1272
1273 wpa_driver_nl80211_free_bss(drv);
1274 #endif /* HOSTAPD */
1275
1276 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1277 netlink_deinit(drv->netlink);
1278
1279 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1280
1281 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1282 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1283
1284 if (drv->ioctl_sock >= 0)
1285 close(drv->ioctl_sock);
1286
1287 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1288 genl_family_put(drv->nl80211);
1289 nl_cache_free(drv->nl_cache);
1290 nl_cache_free(drv->nl_cache_event);
1291 nl_handle_destroy(drv->nl_handle);
1292 nl_handle_destroy(drv->nl_handle_event);
1293 nl_cb_put(drv->nl_cb);
1294
1295 os_free(drv);
1296 }
1297
1298
1299 /**
1300 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1301 * @eloop_ctx: Driver private data
1302 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1303 *
1304 * This function can be used as registered timeout when starting a scan to
1305 * generate a scan completed event if the driver does not report this.
1306 */
1307 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1308 {
1309 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1310 if (drv->ap_scan_as_station) {
1311 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1312 drv->ap_scan_as_station = 0;
1313 }
1314 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1315 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1316 }
1317
1318
1319 /**
1320 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1321 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1322 * @params: Scan parameters
1323 * Returns: 0 on success, -1 on failure
1324 */
1325 static int wpa_driver_nl80211_scan(void *priv,
1326 struct wpa_driver_scan_params *params)
1327 {
1328 struct wpa_driver_nl80211_data *drv = priv;
1329 int ret = 0, timeout;
1330 struct nl_msg *msg, *ssids, *freqs;
1331 size_t i;
1332
1333 msg = nlmsg_alloc();
1334 ssids = nlmsg_alloc();
1335 freqs = nlmsg_alloc();
1336 if (!msg || !ssids || !freqs) {
1337 nlmsg_free(msg);
1338 nlmsg_free(ssids);
1339 nlmsg_free(freqs);
1340 return -1;
1341 }
1342
1343 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1344 NL80211_CMD_TRIGGER_SCAN, 0);
1345
1346 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1347
1348 for (i = 0; i < params->num_ssids; i++) {
1349 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1350 params->ssids[i].ssid);
1351 }
1352 if (params->num_ssids)
1353 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1354
1355 if (params->extra_ies) {
1356 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1357 params->extra_ies);
1358 }
1359
1360 if (params->freqs) {
1361 for (i = 0; params->freqs[i]; i++)
1362 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1363 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1364 }
1365
1366 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1367 msg = NULL;
1368 if (ret) {
1369 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1370 "(%s)", ret, strerror(-ret));
1371 #ifdef HOSTAPD
1372 if (drv->nlmode == NL80211_IFTYPE_AP) {
1373 /*
1374 * mac80211 does not allow scan requests in AP mode, so
1375 * try to do this in station mode.
1376 */
1377 if (wpa_driver_nl80211_set_mode(drv,
1378 IEEE80211_MODE_INFRA))
1379 goto nla_put_failure;
1380
1381 if (wpa_driver_nl80211_scan(drv, params)) {
1382 wpa_driver_nl80211_set_mode(drv,
1383 IEEE80211_MODE_AP);
1384 goto nla_put_failure;
1385 }
1386
1387 /* Restore AP mode when processing scan results */
1388 drv->ap_scan_as_station = 1;
1389 ret = 0;
1390 } else
1391 goto nla_put_failure;
1392 #else /* HOSTAPD */
1393 goto nla_put_failure;
1394 #endif /* HOSTAPD */
1395 }
1396
1397 /* Not all drivers generate "scan completed" wireless event, so try to
1398 * read results after a timeout. */
1399 timeout = 10;
1400 if (drv->scan_complete_events) {
1401 /*
1402 * The driver seems to deliver events to notify when scan is
1403 * complete, so use longer timeout to avoid race conditions
1404 * with scanning and following association request.
1405 */
1406 timeout = 30;
1407 }
1408 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1409 "seconds", ret, timeout);
1410 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1411 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1412 drv, drv->ctx);
1413
1414 nla_put_failure:
1415 nlmsg_free(ssids);
1416 nlmsg_free(msg);
1417 nlmsg_free(freqs);
1418 return ret;
1419 }
1420
1421
1422 static int bss_info_handler(struct nl_msg *msg, void *arg)
1423 {
1424 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1425 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1426 struct nlattr *bss[NL80211_BSS_MAX + 1];
1427 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1428 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1429 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1430 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1431 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1432 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1433 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1434 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1435 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1436 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1437 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1438 };
1439 struct wpa_scan_results *res = arg;
1440 struct wpa_scan_res **tmp;
1441 struct wpa_scan_res *r;
1442 const u8 *ie;
1443 size_t ie_len;
1444
1445 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1446 genlmsg_attrlen(gnlh, 0), NULL);
1447 if (!tb[NL80211_ATTR_BSS])
1448 return NL_SKIP;
1449 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1450 bss_policy))
1451 return NL_SKIP;
1452 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1453 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1454 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1455 } else {
1456 ie = NULL;
1457 ie_len = 0;
1458 }
1459
1460 r = os_zalloc(sizeof(*r) + ie_len);
1461 if (r == NULL)
1462 return NL_SKIP;
1463 if (bss[NL80211_BSS_BSSID])
1464 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1465 ETH_ALEN);
1466 if (bss[NL80211_BSS_FREQUENCY])
1467 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1468 if (bss[NL80211_BSS_BEACON_INTERVAL])
1469 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1470 if (bss[NL80211_BSS_CAPABILITY])
1471 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1472 r->flags |= WPA_SCAN_NOISE_INVALID;
1473 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1474 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1475 r->level /= 100; /* mBm to dBm */
1476 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1477 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1478 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1479 r->flags |= WPA_SCAN_LEVEL_INVALID;
1480 } else
1481 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1482 if (bss[NL80211_BSS_TSF])
1483 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1484 if (bss[NL80211_BSS_SEEN_MS_AGO])
1485 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1486 r->ie_len = ie_len;
1487 if (ie)
1488 os_memcpy(r + 1, ie, ie_len);
1489
1490 if (bss[NL80211_BSS_STATUS]) {
1491 enum nl80211_bss_status status;
1492 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1493 switch (status) {
1494 case NL80211_BSS_STATUS_AUTHENTICATED:
1495 r->flags |= WPA_SCAN_AUTHENTICATED;
1496 break;
1497 case NL80211_BSS_STATUS_ASSOCIATED:
1498 r->flags |= WPA_SCAN_ASSOCIATED;
1499 break;
1500 default:
1501 break;
1502 }
1503 }
1504
1505 tmp = os_realloc(res->res,
1506 (res->num + 1) * sizeof(struct wpa_scan_res *));
1507 if (tmp == NULL) {
1508 os_free(r);
1509 return NL_SKIP;
1510 }
1511 tmp[res->num++] = r;
1512 res->res = tmp;
1513
1514 return NL_SKIP;
1515 }
1516
1517
1518 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1519 const u8 *addr)
1520 {
1521 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1522 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1523 "mismatch");
1524 wpa_driver_nl80211_mlme(drv, addr,
1525 NL80211_CMD_DEAUTHENTICATE,
1526 WLAN_REASON_PREV_AUTH_NOT_VALID);
1527 }
1528 }
1529
1530
1531 static void wpa_driver_nl80211_check_bss_status(
1532 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1533 {
1534 size_t i;
1535
1536 for (i = 0; i < res->num; i++) {
1537 struct wpa_scan_res *r = res->res[i];
1538 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1539 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1540 "indicates BSS status with " MACSTR
1541 " as authenticated",
1542 MAC2STR(r->bssid));
1543 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1544 os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1545 os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1546 0) {
1547 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1548 " in local state (auth=" MACSTR
1549 " assoc=" MACSTR ")",
1550 MAC2STR(drv->auth_bssid),
1551 MAC2STR(drv->bssid));
1552 }
1553 }
1554
1555 if (r->flags & WPA_SCAN_ASSOCIATED) {
1556 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1557 "indicate BSS status with " MACSTR
1558 " as associated",
1559 MAC2STR(r->bssid));
1560 if (drv->nlmode == NL80211_IFTYPE_STATION &&
1561 !drv->associated) {
1562 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1563 "(not associated) does not match "
1564 "with BSS state");
1565 clear_state_mismatch(drv, r->bssid);
1566 } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1567 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1568 0) {
1569 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1570 "(associated with " MACSTR ") does "
1571 "not match with BSS state",
1572 MAC2STR(drv->bssid));
1573 clear_state_mismatch(drv, r->bssid);
1574 clear_state_mismatch(drv, drv->bssid);
1575 }
1576 }
1577 }
1578 }
1579
1580
1581 /**
1582 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1583 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1584 * Returns: Scan results on success, -1 on failure
1585 */
1586 static struct wpa_scan_results *
1587 wpa_driver_nl80211_get_scan_results(void *priv)
1588 {
1589 struct wpa_driver_nl80211_data *drv = priv;
1590 struct nl_msg *msg;
1591 struct wpa_scan_results *res;
1592 int ret;
1593
1594 res = os_zalloc(sizeof(*res));
1595 if (res == NULL)
1596 return NULL;
1597 msg = nlmsg_alloc();
1598 if (!msg)
1599 goto nla_put_failure;
1600
1601 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1602 NL80211_CMD_GET_SCAN, 0);
1603 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1604
1605 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1606 msg = NULL;
1607 if (ret == 0) {
1608 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1609 (unsigned long) res->num);
1610 wpa_driver_nl80211_check_bss_status(drv, res);
1611 return res;
1612 }
1613 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1614 "(%s)", ret, strerror(-ret));
1615 nla_put_failure:
1616 nlmsg_free(msg);
1617 wpa_scan_results_free(res);
1618 return NULL;
1619 }
1620
1621
1622 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1623 enum wpa_alg alg, const u8 *addr,
1624 int key_idx, int set_tx,
1625 const u8 *seq, size_t seq_len,
1626 const u8 *key, size_t key_len)
1627 {
1628 struct wpa_driver_nl80211_data *drv = priv;
1629 int ifindex = if_nametoindex(ifname);
1630 struct nl_msg *msg;
1631 int ret;
1632
1633 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1634 "set_tx=%d seq_len=%lu key_len=%lu",
1635 __func__, ifindex, alg, addr, key_idx, set_tx,
1636 (unsigned long) seq_len, (unsigned long) key_len);
1637
1638 msg = nlmsg_alloc();
1639 if (!msg)
1640 return -ENOMEM;
1641
1642 if (alg == WPA_ALG_NONE) {
1643 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1644 0, NL80211_CMD_DEL_KEY, 0);
1645 } else {
1646 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1647 0, NL80211_CMD_NEW_KEY, 0);
1648 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1649 switch (alg) {
1650 case WPA_ALG_WEP:
1651 if (key_len == 5)
1652 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1653 WLAN_CIPHER_SUITE_WEP40);
1654 else
1655 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1656 WLAN_CIPHER_SUITE_WEP104);
1657 break;
1658 case WPA_ALG_TKIP:
1659 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1660 WLAN_CIPHER_SUITE_TKIP);
1661 break;
1662 case WPA_ALG_CCMP:
1663 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1664 WLAN_CIPHER_SUITE_CCMP);
1665 break;
1666 case WPA_ALG_IGTK:
1667 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1668 WLAN_CIPHER_SUITE_AES_CMAC);
1669 break;
1670 default:
1671 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1672 "algorithm %d", __func__, alg);
1673 nlmsg_free(msg);
1674 return -1;
1675 }
1676 }
1677
1678 if (seq && seq_len)
1679 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1680
1681 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1682 {
1683 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1684 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1685 }
1686 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1687 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1688
1689 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1690 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1691 ret = 0;
1692 if (ret)
1693 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1694 ret, strerror(-ret));
1695
1696 /*
1697 * If we failed or don't need to set the default TX key (below),
1698 * we're done here.
1699 */
1700 if (ret || !set_tx || alg == WPA_ALG_NONE)
1701 return ret;
1702 #ifdef HOSTAPD /* FIX: is this needed? */
1703 if (addr)
1704 return ret;
1705 #endif /* HOSTAPD */
1706
1707 msg = nlmsg_alloc();
1708 if (!msg)
1709 return -ENOMEM;
1710
1711 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1712 0, NL80211_CMD_SET_KEY, 0);
1713 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1714 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1715 if (alg == WPA_ALG_IGTK)
1716 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1717 else
1718 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1719
1720 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1721 if (ret == -ENOENT)
1722 ret = 0;
1723 if (ret)
1724 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1725 "err=%d %s)", ret, strerror(-ret));
1726 return ret;
1727
1728 nla_put_failure:
1729 return -ENOBUFS;
1730 }
1731
1732
1733 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
1734 int key_idx, int defkey,
1735 const u8 *seq, size_t seq_len,
1736 const u8 *key, size_t key_len)
1737 {
1738 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1739 if (!key_attr)
1740 return -1;
1741
1742 if (defkey && alg == WPA_ALG_IGTK)
1743 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1744 else if (defkey)
1745 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1746
1747 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1748
1749 switch (alg) {
1750 case WPA_ALG_WEP:
1751 if (key_len == 5)
1752 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1753 WLAN_CIPHER_SUITE_WEP40);
1754 else
1755 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1756 WLAN_CIPHER_SUITE_WEP104);
1757 break;
1758 case WPA_ALG_TKIP:
1759 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1760 break;
1761 case WPA_ALG_CCMP:
1762 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1763 break;
1764 case WPA_ALG_IGTK:
1765 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1766 WLAN_CIPHER_SUITE_AES_CMAC);
1767 break;
1768 default:
1769 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1770 "algorithm %d", __func__, alg);
1771 return -1;
1772 }
1773
1774 if (seq && seq_len)
1775 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1776
1777 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1778
1779 nla_nest_end(msg, key_attr);
1780
1781 return 0;
1782 nla_put_failure:
1783 return -1;
1784 }
1785
1786
1787 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1788 struct nl_msg *msg)
1789 {
1790 int i, privacy = 0;
1791 struct nlattr *nl_keys, *nl_key;
1792
1793 for (i = 0; i < 4; i++) {
1794 if (!params->wep_key[i])
1795 continue;
1796 privacy = 1;
1797 break;
1798 }
1799 if (!privacy)
1800 return 0;
1801
1802 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1803
1804 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1805 if (!nl_keys)
1806 goto nla_put_failure;
1807
1808 for (i = 0; i < 4; i++) {
1809 if (!params->wep_key[i])
1810 continue;
1811
1812 nl_key = nla_nest_start(msg, i);
1813 if (!nl_key)
1814 goto nla_put_failure;
1815
1816 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1817 params->wep_key[i]);
1818 if (params->wep_key_len[i] == 5)
1819 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1820 WLAN_CIPHER_SUITE_WEP40);
1821 else
1822 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1823 WLAN_CIPHER_SUITE_WEP104);
1824
1825 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1826
1827 if (i == params->wep_tx_keyidx)
1828 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1829
1830 nla_nest_end(msg, nl_key);
1831 }
1832 nla_nest_end(msg, nl_keys);
1833
1834 return 0;
1835
1836 nla_put_failure:
1837 return -ENOBUFS;
1838 }
1839
1840
1841 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1842 const u8 *addr, int cmd, u16 reason_code)
1843 {
1844 int ret = -1;
1845 struct nl_msg *msg;
1846
1847 msg = nlmsg_alloc();
1848 if (!msg)
1849 return -1;
1850
1851 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1852
1853 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1854 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1855 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1856
1857 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1858 msg = NULL;
1859 if (ret) {
1860 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1861 "(%s)", ret, strerror(-ret));
1862 goto nla_put_failure;
1863 }
1864 ret = 0;
1865
1866 nla_put_failure:
1867 nlmsg_free(msg);
1868 return ret;
1869 }
1870
1871
1872 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1873 const u8 *addr, int reason_code)
1874 {
1875 wpa_printf(MSG_DEBUG, "%s", __func__);
1876 drv->associated = 0;
1877 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1878 reason_code);
1879 }
1880
1881
1882 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1883 int reason_code)
1884 {
1885 struct wpa_driver_nl80211_data *drv = priv;
1886 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1887 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1888 wpa_printf(MSG_DEBUG, "%s", __func__);
1889 drv->associated = 0;
1890 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1891 reason_code);
1892 }
1893
1894
1895 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1896 int reason_code)
1897 {
1898 struct wpa_driver_nl80211_data *drv = priv;
1899 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1900 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1901 wpa_printf(MSG_DEBUG, "%s", __func__);
1902 drv->associated = 0;
1903 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1904 reason_code);
1905 }
1906
1907
1908 static int wpa_driver_nl80211_authenticate(
1909 void *priv, struct wpa_driver_auth_params *params)
1910 {
1911 struct wpa_driver_nl80211_data *drv = priv;
1912 int ret = -1, i;
1913 struct nl_msg *msg;
1914 enum nl80211_auth_type type;
1915 int count = 0;
1916
1917 drv->associated = 0;
1918 os_memset(drv->auth_bssid, 0, ETH_ALEN);
1919
1920 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1921 return -1;
1922
1923 retry:
1924 msg = nlmsg_alloc();
1925 if (!msg)
1926 return -1;
1927
1928 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1929 drv->ifindex);
1930
1931 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1932 NL80211_CMD_AUTHENTICATE, 0);
1933
1934 for (i = 0; i < 4; i++) {
1935 if (!params->wep_key[i])
1936 continue;
1937 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1938 i,
1939 i == params->wep_tx_keyidx, NULL, 0,
1940 params->wep_key[i],
1941 params->wep_key_len[i]);
1942 if (params->wep_tx_keyidx != i)
1943 continue;
1944 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1945 params->wep_key[i], params->wep_key_len[i])) {
1946 nlmsg_free(msg);
1947 return -1;
1948 }
1949 }
1950
1951 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1952 if (params->bssid) {
1953 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1954 MAC2STR(params->bssid));
1955 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1956 }
1957 if (params->freq) {
1958 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1959 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1960 }
1961 if (params->ssid) {
1962 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1963 params->ssid, params->ssid_len);
1964 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1965 params->ssid);
1966 }
1967 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1968 if (params->ie)
1969 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1970 /*
1971 * TODO: if multiple auth_alg options enabled, try them one by one if
1972 * the AP rejects authentication due to unknown auth alg
1973 */
1974 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1975 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1976 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1977 type = NL80211_AUTHTYPE_SHARED_KEY;
1978 else if (params->auth_alg & AUTH_ALG_LEAP)
1979 type = NL80211_AUTHTYPE_NETWORK_EAP;
1980 else if (params->auth_alg & AUTH_ALG_FT)
1981 type = NL80211_AUTHTYPE_FT;
1982 else
1983 goto nla_put_failure;
1984 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1985 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1986
1987 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1988 msg = NULL;
1989 if (ret) {
1990 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1991 "(%s)", ret, strerror(-ret));
1992 count++;
1993 if (ret == -EALREADY && count == 1 && params->bssid) {
1994 /*
1995 * mac80211 does not currently accept new
1996 * authentication if we are already authenticated. As a
1997 * workaround, force deauthentication and try again.
1998 */
1999 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2000 "after forced deauthentication");
2001 wpa_driver_nl80211_deauthenticate(
2002 drv, params->bssid,
2003 WLAN_REASON_PREV_AUTH_NOT_VALID);
2004 nlmsg_free(msg);
2005 goto retry;
2006 }
2007 goto nla_put_failure;
2008 }
2009 ret = 0;
2010 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2011 "successfully");
2012
2013 nla_put_failure:
2014 nlmsg_free(msg);
2015 return ret;
2016 }
2017
2018
2019 struct phy_info_arg {
2020 u16 *num_modes;
2021 struct hostapd_hw_modes *modes;
2022 };
2023
2024 static int phy_info_handler(struct nl_msg *msg, void *arg)
2025 {
2026 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2027 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2028 struct phy_info_arg *phy_info = arg;
2029
2030 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2031
2032 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2033 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2034 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2035 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2036 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2037 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2038 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2039 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2040 };
2041
2042 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2043 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2044 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2045 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2046 };
2047
2048 struct nlattr *nl_band;
2049 struct nlattr *nl_freq;
2050 struct nlattr *nl_rate;
2051 int rem_band, rem_freq, rem_rate;
2052 struct hostapd_hw_modes *mode;
2053 int idx, mode_is_set;
2054
2055 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2056 genlmsg_attrlen(gnlh, 0), NULL);
2057
2058 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2059 return NL_SKIP;
2060
2061 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2062 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2063 if (!mode)
2064 return NL_SKIP;
2065 phy_info->modes = mode;
2066
2067 mode_is_set = 0;
2068
2069 mode = &phy_info->modes[*(phy_info->num_modes)];
2070 memset(mode, 0, sizeof(*mode));
2071 *(phy_info->num_modes) += 1;
2072
2073 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2074 nla_len(nl_band), NULL);
2075
2076 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2077 mode->ht_capab = nla_get_u16(
2078 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2079 }
2080
2081 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2082 mode->a_mpdu_params |= nla_get_u8(
2083 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2084 0x03;
2085 }
2086
2087 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2088 mode->a_mpdu_params |= nla_get_u8(
2089 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2090 2;
2091 }
2092
2093 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2094 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2095 u8 *mcs;
2096 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2097 os_memcpy(mode->mcs_set, mcs, 16);
2098 }
2099
2100 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2101 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2102 nla_len(nl_freq), freq_policy);
2103 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2104 continue;
2105 mode->num_channels++;
2106 }
2107
2108 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2109 if (!mode->channels)
2110 return NL_SKIP;
2111
2112 idx = 0;
2113
2114 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2115 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2116 nla_len(nl_freq), freq_policy);
2117 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2118 continue;
2119
2120 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2121 mode->channels[idx].flag = 0;
2122
2123 if (!mode_is_set) {
2124 /* crude heuristic */
2125 if (mode->channels[idx].freq < 4000)
2126 mode->mode = HOSTAPD_MODE_IEEE80211B;
2127 else
2128 mode->mode = HOSTAPD_MODE_IEEE80211A;
2129 mode_is_set = 1;
2130 }
2131
2132 /* crude heuristic */
2133 if (mode->channels[idx].freq < 4000)
2134 if (mode->channels[idx].freq == 2484)
2135 mode->channels[idx].chan = 14;
2136 else
2137 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2138 else
2139 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2140
2141 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2142 mode->channels[idx].flag |=
2143 HOSTAPD_CHAN_DISABLED;
2144 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2145 mode->channels[idx].flag |=
2146 HOSTAPD_CHAN_PASSIVE_SCAN;
2147 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2148 mode->channels[idx].flag |=
2149 HOSTAPD_CHAN_NO_IBSS;
2150 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2151 mode->channels[idx].flag |=
2152 HOSTAPD_CHAN_RADAR;
2153
2154 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2155 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2156 mode->channels[idx].max_tx_power =
2157 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2158
2159 idx++;
2160 }
2161
2162 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2163 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2164 nla_len(nl_rate), rate_policy);
2165 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2166 continue;
2167 mode->num_rates++;
2168 }
2169
2170 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2171 if (!mode->rates)
2172 return NL_SKIP;
2173
2174 idx = 0;
2175
2176 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2177 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2178 nla_len(nl_rate), rate_policy);
2179 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2180 continue;
2181 mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2182
2183 /* crude heuristic */
2184 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2185 mode->rates[idx] > 200)
2186 mode->mode = HOSTAPD_MODE_IEEE80211G;
2187
2188 idx++;
2189 }
2190 }
2191
2192 return NL_SKIP;
2193 }
2194
2195 static struct hostapd_hw_modes *
2196 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2197 {
2198 u16 m;
2199 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2200 int i, mode11g_idx = -1;
2201
2202 /* If only 802.11g mode is included, use it to construct matching
2203 * 802.11b mode data. */
2204
2205 for (m = 0; m < *num_modes; m++) {
2206 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2207 return modes; /* 802.11b already included */
2208 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2209 mode11g_idx = m;
2210 }
2211
2212 if (mode11g_idx < 0)
2213 return modes; /* 2.4 GHz band not supported at all */
2214
2215 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2216 if (nmodes == NULL)
2217 return modes; /* Could not add 802.11b mode */
2218
2219 mode = &nmodes[*num_modes];
2220 os_memset(mode, 0, sizeof(*mode));
2221 (*num_modes)++;
2222 modes = nmodes;
2223
2224 mode->mode = HOSTAPD_MODE_IEEE80211B;
2225
2226 mode11g = &modes[mode11g_idx];
2227 mode->num_channels = mode11g->num_channels;
2228 mode->channels = os_malloc(mode11g->num_channels *
2229 sizeof(struct hostapd_channel_data));
2230 if (mode->channels == NULL) {
2231 (*num_modes)--;
2232 return modes; /* Could not add 802.11b mode */
2233 }
2234 os_memcpy(mode->channels, mode11g->channels,
2235 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2236
2237 mode->num_rates = 0;
2238 mode->rates = os_malloc(4 * sizeof(int));
2239 if (mode->rates == NULL) {
2240 os_free(mode->channels);
2241 (*num_modes)--;
2242 return modes; /* Could not add 802.11b mode */
2243 }
2244
2245 for (i = 0; i < mode11g->num_rates; i++) {
2246 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2247 mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2248 continue;
2249 mode->rates[mode->num_rates] = mode11g->rates[i];
2250 mode->num_rates++;
2251 if (mode->num_rates == 4)
2252 break;
2253 }
2254
2255 if (mode->num_rates == 0) {
2256 os_free(mode->channels);
2257 os_free(mode->rates);
2258 (*num_modes)--;
2259 return modes; /* No 802.11b rates */
2260 }
2261
2262 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2263 "information");
2264
2265 return modes;
2266 }
2267
2268
2269 static struct hostapd_hw_modes *
2270 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2271 {
2272 struct wpa_driver_nl80211_data *drv = priv;
2273 struct nl_msg *msg;
2274 struct phy_info_arg result = {
2275 .num_modes = num_modes,
2276 .modes = NULL,
2277 };
2278
2279 *num_modes = 0;
2280 *flags = 0;
2281
2282 msg = nlmsg_alloc();
2283 if (!msg)
2284 return NULL;
2285
2286 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2287 0, NL80211_CMD_GET_WIPHY, 0);
2288
2289 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2290
2291 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2292 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2293 nla_put_failure:
2294 return NULL;
2295 }
2296
2297
2298 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2299 const void *data, size_t len,
2300 int encrypt)
2301 {
2302 __u8 rtap_hdr[] = {
2303 0x00, 0x00, /* radiotap version */
2304 0x0e, 0x00, /* radiotap length */
2305 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2306 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2307 0x00, /* padding */
2308 0x00, 0x00, /* RX and TX flags to indicate that */
2309 0x00, 0x00, /* this is the injected frame directly */
2310 };
2311 struct iovec iov[2] = {
2312 {
2313 .iov_base = &rtap_hdr,
2314 .iov_len = sizeof(rtap_hdr),
2315 },
2316 {
2317 .iov_base = (void *) data,
2318 .iov_len = len,
2319 }
2320 };
2321 struct msghdr msg = {
2322 .msg_name = NULL,
2323 .msg_namelen = 0,
2324 .msg_iov = iov,
2325 .msg_iovlen = 2,
2326 .msg_control = NULL,
2327 .msg_controllen = 0,
2328 .msg_flags = 0,
2329 };
2330
2331 if (encrypt)
2332 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2333
2334 return sendmsg(drv->monitor_sock, &msg, 0);
2335 }
2336
2337
2338 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2339 size_t data_len)
2340 {
2341 struct wpa_driver_nl80211_data *drv = priv;
2342 struct ieee80211_mgmt *mgmt;
2343 int encrypt = 1;
2344 u16 fc;
2345
2346 mgmt = (struct ieee80211_mgmt *) data;
2347 fc = le_to_host16(mgmt->frame_control);
2348
2349 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2350 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2351 /*
2352 * Only one of the authentication frame types is encrypted.
2353 * In order for static WEP encryption to work properly (i.e.,
2354 * to not encrypt the frame), we need to tell mac80211 about
2355 * the frames that must not be encrypted.
2356 */
2357 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2358 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2359 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2360 encrypt = 0;
2361 }
2362
2363 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2364 }
2365
2366
2367 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2368 const u8 *head, size_t head_len,
2369 const u8 *tail, size_t tail_len,
2370 int dtim_period, int beacon_int)
2371 {
2372 struct wpa_driver_nl80211_data *drv = priv;
2373 struct nl_msg *msg;
2374 u8 cmd = NL80211_CMD_NEW_BEACON;
2375 int ret;
2376 int beacon_set;
2377 int ifindex = if_nametoindex(ifname);
2378 #ifdef HOSTAPD
2379 struct i802_bss *bss;
2380
2381 bss = get_bss(drv, ifindex);
2382 if (bss == NULL)
2383 return -ENOENT;
2384 beacon_set = bss->beacon_set;
2385 #else /* HOSTAPD */
2386 beacon_set = drv->beacon_set;
2387 #endif /* HOSTAPD */
2388
2389 msg = nlmsg_alloc();
2390 if (!msg)
2391 return -ENOMEM;
2392
2393 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2394 beacon_set);
2395 if (beacon_set)
2396 cmd = NL80211_CMD_SET_BEACON;
2397
2398 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2399 0, cmd, 0);
2400 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2401 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2402 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2403 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2404 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2405
2406 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2407 if (ret) {
2408 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2409 ret, strerror(-ret));
2410 } else {
2411 #ifdef HOSTAPD
2412 bss->beacon_set = 1;
2413 #else /* HOSTAPD */
2414 drv->beacon_set = 1;
2415 #endif /* HOSTAPD */
2416 }
2417 return ret;
2418 nla_put_failure:
2419 return -ENOBUFS;
2420 }
2421
2422
2423 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2424 int freq, int ht_enabled,
2425 int sec_channel_offset)
2426 {
2427 struct nl_msg *msg;
2428 int ret;
2429
2430 msg = nlmsg_alloc();
2431 if (!msg)
2432 return -1;
2433
2434 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2435 NL80211_CMD_SET_WIPHY, 0);
2436
2437 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2438 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2439 if (ht_enabled) {
2440 switch (sec_channel_offset) {
2441 case -1:
2442 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2443 NL80211_CHAN_HT40MINUS);
2444 break;
2445 case 1:
2446 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2447 NL80211_CHAN_HT40PLUS);
2448 break;
2449 default:
2450 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2451 NL80211_CHAN_HT20);
2452 break;
2453 }
2454 }
2455
2456 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2457 if (ret == 0)
2458 return 0;
2459 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2460 "%d (%s)", freq, ret, strerror(-ret));
2461 nla_put_failure:
2462 return -1;
2463 }
2464
2465
2466 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2467 struct hostapd_sta_add_params *params)
2468 {
2469 struct wpa_driver_nl80211_data *drv = priv;
2470 struct nl_msg *msg;
2471 int ret = -ENOBUFS;
2472
2473 msg = nlmsg_alloc();
2474 if (!msg)
2475 return -ENOMEM;
2476
2477 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2478 0, NL80211_CMD_NEW_STATION, 0);
2479
2480 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2481 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2482 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2483 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2484 params->supp_rates);
2485 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2486 params->listen_interval);
2487 if (params->ht_capabilities) {
2488 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2489 sizeof(*params->ht_capabilities),
2490 params->ht_capabilities);
2491 }
2492
2493 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2494 if (ret)
2495 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2496 "result: %d (%s)", ret, strerror(-ret));
2497 if (ret == -EEXIST)
2498 ret = 0;
2499 nla_put_failure:
2500 return ret;
2501 }
2502
2503
2504 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2505 {
2506 struct wpa_driver_nl80211_data *drv = priv;
2507 struct nl_msg *msg;
2508 int ret;
2509
2510 msg = nlmsg_alloc();
2511 if (!msg)
2512 return -ENOMEM;
2513
2514 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2515 0, NL80211_CMD_DEL_STATION, 0);
2516
2517 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2518 if_nametoindex(drv->ifname));
2519 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2520
2521 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2522 if (ret == -ENOENT)
2523 return 0;
2524 return ret;
2525 nla_put_failure:
2526 return -ENOBUFS;
2527 }
2528
2529
2530 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2531 int ifidx)
2532 {
2533 struct nl_msg *msg;
2534
2535 #ifdef HOSTAPD
2536 /* stop listening for EAPOL on this interface */
2537 del_ifidx(drv, ifidx);
2538 #endif /* HOSTAPD */
2539
2540 msg = nlmsg_alloc();
2541 if (!msg)
2542 goto nla_put_failure;
2543
2544 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2545 0, NL80211_CMD_DEL_INTERFACE, 0);
2546 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2547
2548 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2549 return;
2550 nla_put_failure:
2551 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2552 ifidx);
2553 }
2554
2555
2556 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2557 const char *ifname,
2558 enum nl80211_iftype iftype,
2559 const u8 *addr, int wds)
2560 {
2561 struct nl_msg *msg, *flags = NULL;
2562 int ifidx;
2563 int ret = -ENOBUFS;
2564
2565 msg = nlmsg_alloc();
2566 if (!msg)
2567 return -1;
2568
2569 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2570 0, NL80211_CMD_NEW_INTERFACE, 0);
2571 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2572 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2573 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2574
2575 if (iftype == NL80211_IFTYPE_MONITOR) {
2576 int err;
2577
2578 flags = nlmsg_alloc();
2579 if (!flags)
2580 goto nla_put_failure;
2581
2582 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2583
2584 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2585
2586 nlmsg_free(flags);
2587
2588 if (err)
2589 goto nla_put_failure;
2590 } else if (wds) {
2591 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2592 }
2593
2594 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2595 if (ret) {
2596 nla_put_failure:
2597 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2598 ifname, ret, strerror(-ret));
2599 return ret;
2600 }
2601
2602 ifidx = if_nametoindex(ifname);
2603
2604 if (ifidx <= 0)
2605 return -1;
2606
2607 #ifdef HOSTAPD
2608 /* start listening for EAPOL on this interface */
2609 add_ifidx(drv, ifidx);
2610
2611 if (addr && iftype == NL80211_IFTYPE_AP &&
2612 set_ifhwaddr(drv, ifname, addr)) {
2613 nl80211_remove_iface(drv, ifidx);
2614 return -1;
2615 }
2616 #endif /* HOSTAPD */
2617
2618 return ifidx;
2619 }
2620
2621
2622 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2623 const char *ifname, enum nl80211_iftype iftype,
2624 const u8 *addr, int wds)
2625 {
2626 int ret;
2627
2628 ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2629
2630 /* if error occured and interface exists already */
2631 if (ret == -ENFILE && if_nametoindex(ifname)) {
2632 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2633
2634 /* Try to remove the interface that was already there. */
2635 nl80211_remove_iface(drv, if_nametoindex(ifname));
2636
2637 /* Try to create the interface again */
2638 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2639 wds);
2640 }
2641
2642 return ret;
2643 }
2644
2645
2646 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2647 {
2648 struct ieee80211_hdr *hdr;
2649 u16 fc;
2650 union wpa_event_data event;
2651
2652 hdr = (struct ieee80211_hdr *) buf;
2653 fc = le_to_host16(hdr->frame_control);
2654
2655 os_memset(&event, 0, sizeof(event));
2656 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2657 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2658 event.tx_status.dst = hdr->addr1;
2659 event.tx_status.data = buf;
2660 event.tx_status.data_len = len;
2661 event.tx_status.ack = ok;
2662 wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2663 }
2664
2665
2666 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2667 struct ieee80211_hdr *hdr, size_t len)
2668 {
2669 union wpa_event_data event;
2670 os_memset(&event, 0, sizeof(event));
2671 event.rx_from_unknown.hdr = hdr;
2672 event.rx_from_unknown.len = len;
2673 wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2674 }
2675
2676
2677 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2678 u8 *buf, size_t len,
2679 struct hostapd_frame_info *hfi)
2680 {
2681 struct ieee80211_hdr *hdr;
2682 u16 fc;
2683 union wpa_event_data event;
2684
2685 hdr = (struct ieee80211_hdr *) buf;
2686 fc = le_to_host16(hdr->frame_control);
2687
2688 switch (WLAN_FC_GET_TYPE(fc)) {
2689 case WLAN_FC_TYPE_MGMT:
2690 os_memset(&event, 0, sizeof(event));
2691 event.rx_mgmt.frame = buf;
2692 event.rx_mgmt.frame_len = len;
2693 event.rx_mgmt.fi = hfi;
2694 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2695 break;
2696 case WLAN_FC_TYPE_CTRL:
2697 /* can only get here with PS-Poll frames */
2698 wpa_printf(MSG_DEBUG, "CTRL");
2699 from_unknown_sta(drv, hdr, len);
2700 break;
2701 case WLAN_FC_TYPE_DATA:
2702 from_unknown_sta(drv, hdr, len);
2703 break;
2704 }
2705 }
2706
2707
2708 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2709 {
2710 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2711 int len;
2712 unsigned char buf[3000];
2713 struct ieee80211_radiotap_iterator iter;
2714 int ret;
2715 struct hostapd_frame_info hfi;
2716 int injected = 0, failed = 0, rxflags = 0;
2717
2718 len = recv(sock, buf, sizeof(buf), 0);
2719 if (len < 0) {
2720 perror("recv");
2721 return;
2722 }
2723
2724 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2725 printf("received invalid radiotap frame\n");
2726 return;
2727 }
2728
2729 memset(&hfi, 0, sizeof(hfi));
2730
2731 while (1) {
2732 ret = ieee80211_radiotap_iterator_next(&iter);
2733 if (ret == -ENOENT)
2734 break;
2735 if (ret) {
2736 printf("received invalid radiotap frame (%d)\n", ret);
2737 return;
2738 }
2739 switch (iter.this_arg_index) {
2740 case IEEE80211_RADIOTAP_FLAGS:
2741 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2742 len -= 4;
2743 break;
2744 case IEEE80211_RADIOTAP_RX_FLAGS:
2745 rxflags = 1;
2746 break;
2747 case IEEE80211_RADIOTAP_TX_FLAGS:
2748 injected = 1;
2749 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2750 IEEE80211_RADIOTAP_F_TX_FAIL;
2751 break;
2752 case IEEE80211_RADIOTAP_DATA_RETRIES:
2753 break;
2754 case IEEE80211_RADIOTAP_CHANNEL:
2755 /* TODO convert from freq/flags to channel number
2756 hfi.channel = XXX;
2757 */
2758 break;
2759 case IEEE80211_RADIOTAP_RATE:
2760 hfi.datarate = *iter.this_arg * 5;
2761 break;
2762 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2763 hfi.ssi_signal = *iter.this_arg;
2764 break;
2765 }
2766 }
2767
2768 if (rxflags && injected)
2769 return;
2770
2771 if (!injected)
2772 handle_frame(drv, buf + iter.max_length,
2773 len - iter.max_length, &hfi);
2774 else
2775 handle_tx_callback(drv->ctx, buf + iter.max_length,
2776 len - iter.max_length, !failed);
2777 }
2778
2779
2780 /*
2781 * we post-process the filter code later and rewrite
2782 * this to the offset to the last instruction
2783 */
2784 #define PASS 0xFF
2785 #define FAIL 0xFE
2786
2787 static struct sock_filter msock_filter_insns[] = {
2788 /*
2789 * do a little-endian load of the radiotap length field
2790 */
2791 /* load lower byte into A */
2792 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2793 /* put it into X (== index register) */
2794 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2795 /* load upper byte into A */
2796 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2797 /* left-shift it by 8 */
2798 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2799 /* or with X */
2800 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2801 /* put result into X */
2802 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2803
2804 /*
2805 * Allow management frames through, this also gives us those
2806 * management frames that we sent ourselves with status
2807 */
2808 /* load the lower byte of the IEEE 802.11 frame control field */
2809 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2810 /* mask off frame type and version */
2811 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2812 /* accept frame if it's both 0, fall through otherwise */
2813 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2814
2815 /*
2816 * TODO: add a bit to radiotap RX flags that indicates
2817 * that the sending station is not associated, then
2818 * add a filter here that filters on our DA and that flag
2819 * to allow us to deauth frames to that bad station.
2820 *
2821 * Not a regression -- we didn't do it before either.
2822 */
2823
2824 #if 0
2825 /*
2826 * drop non-data frames
2827 */
2828 /* load the lower byte of the frame control field */
2829 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2830 /* mask off QoS bit */
2831 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2832 /* drop non-data frames */
2833 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2834 #endif
2835 /* load the upper byte of the frame control field */
2836 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
2837 /* mask off toDS/fromDS */
2838 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2839 /* accept WDS frames */
2840 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, PASS, 0),
2841
2842 /*
2843 * add header length to index
2844 */
2845 /* load the lower byte of the frame control field */
2846 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2847 /* mask off QoS bit */
2848 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2849 /* right shift it by 6 to give 0 or 2 */
2850 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2851 /* add data frame header length */
2852 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2853 /* add index, was start of 802.11 header */
2854 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2855 /* move to index, now start of LL header */
2856 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2857
2858 /*
2859 * Accept empty data frames, we use those for
2860 * polling activity.
2861 */
2862 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2863 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2864
2865 /*
2866 * Accept EAPOL frames
2867 */
2868 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2869 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2870 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2871 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2872
2873 /* keep these last two statements or change the code below */
2874 /* return 0 == "DROP" */
2875 BPF_STMT(BPF_RET | BPF_K, 0),
2876 /* return ~0 == "keep all" */
2877 BPF_STMT(BPF_RET | BPF_K, ~0),
2878 };
2879
2880 static struct sock_fprog msock_filter = {
2881 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2882 .filter = msock_filter_insns,
2883 };
2884
2885
2886 static int add_monitor_filter(int s)
2887 {
2888 int idx;
2889
2890 /* rewrite all PASS/FAIL jump offsets */
2891 for (idx = 0; idx < msock_filter.len; idx++) {
2892 struct sock_filter *insn = &msock_filter_insns[idx];
2893
2894 if (BPF_CLASS(insn->code) == BPF_JMP) {
2895 if (insn->code == (BPF_JMP|BPF_JA)) {
2896 if (insn->k == PASS)
2897 insn->k = msock_filter.len - idx - 2;
2898 else if (insn->k == FAIL)
2899 insn->k = msock_filter.len - idx - 3;
2900 }
2901
2902 if (insn->jt == PASS)
2903 insn->jt = msock_filter.len - idx - 2;
2904 else if (insn->jt == FAIL)
2905 insn->jt = msock_filter.len - idx - 3;
2906
2907 if (insn->jf == PASS)
2908 insn->jf = msock_filter.len - idx - 2;
2909 else if (insn->jf == FAIL)
2910 insn->jf = msock_filter.len - idx - 3;
2911 }
2912 }
2913
2914 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2915 &msock_filter, sizeof(msock_filter))) {
2916 perror("SO_ATTACH_FILTER");
2917 return -1;
2918 }
2919
2920 return 0;
2921 }
2922
2923
2924 static void nl80211_remove_monitor_interface(
2925 struct wpa_driver_nl80211_data *drv)
2926 {
2927 if (drv->monitor_ifidx >= 0) {
2928 nl80211_remove_iface(drv, drv->monitor_ifidx);
2929 drv->monitor_ifidx = -1;
2930 }
2931 }
2932
2933
2934 static int
2935 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2936 {
2937 char buf[IFNAMSIZ];
2938 struct sockaddr_ll ll;
2939 int optval;
2940 socklen_t optlen;
2941
2942 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2943 buf[IFNAMSIZ - 1] = '\0';
2944
2945 drv->monitor_ifidx =
2946 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
2947 0);
2948
2949 if (drv->monitor_ifidx < 0)
2950 return -1;
2951
2952 if (hostapd_set_iface_flags(drv, buf, 1))
2953 goto error;
2954
2955 memset(&ll, 0, sizeof(ll));
2956 ll.sll_family = AF_PACKET;
2957 ll.sll_ifindex = drv->monitor_ifidx;
2958 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2959 if (drv->monitor_sock < 0) {
2960 perror("socket[PF_PACKET,SOCK_RAW]");
2961 goto error;
2962 }
2963
2964 if (add_monitor_filter(drv->monitor_sock)) {
2965 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2966 "interface; do filtering in user space");
2967 /* This works, but will cost in performance. */
2968 }
2969
2970 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2971 perror("monitor socket bind");
2972 goto error;
2973 }
2974
2975 optlen = sizeof(optval);
2976 optval = 20;
2977 if (setsockopt
2978 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2979 perror("Failed to set socket priority");
2980 goto error;
2981 }
2982
2983 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2984 drv, NULL)) {
2985 printf("Could not register monitor read socket\n");
2986 goto error;
2987 }
2988
2989 return 0;
2990 error:
2991 nl80211_remove_monitor_interface(drv);
2992 return -1;
2993 }
2994
2995
2996 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2997
2998 static int wpa_driver_nl80211_hapd_send_eapol(
2999 void *priv, const u8 *addr, const u8 *data,
3000 size_t data_len, int encrypt, const u8 *own_addr)
3001 {
3002 struct wpa_driver_nl80211_data *drv = priv;
3003 struct ieee80211_hdr *hdr;
3004 size_t len;
3005 u8 *pos;
3006 int res;
3007 #if 0 /* FIX */
3008 int qos = sta->flags & WPA_STA_WMM;
3009 #else
3010 int qos = 0;
3011 #endif
3012
3013 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3014 data_len;
3015 hdr = os_zalloc(len);
3016 if (hdr == NULL) {
3017 printf("malloc() failed for i802_send_data(len=%lu)\n",
3018 (unsigned long) len);
3019 return -1;
3020 }
3021
3022 hdr->frame_control =
3023 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3024 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3025 if (encrypt)
3026 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3027 #if 0 /* To be enabled if qos determination is added above */
3028 if (qos) {
3029 hdr->frame_control |=
3030 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3031 }
3032 #endif
3033
3034 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3035 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3036 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3037 pos = (u8 *) (hdr + 1);
3038
3039 #if 0 /* To be enabled if qos determination is added above */
3040 if (qos) {
3041 /* add an empty QoS header if needed */
3042 pos[0] = 0;
3043 pos[1] = 0;
3044 pos += 2;
3045 }
3046 #endif
3047
3048 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3049 pos += sizeof(rfc1042_header);
3050 WPA_PUT_BE16(pos, ETH_P_PAE);
3051 pos += 2;
3052 memcpy(pos, data, data_len);
3053
3054 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3055 if (res < 0) {
3056 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3057 "failed: %d (%s)",
3058 (unsigned long) len, errno, strerror(errno));
3059 }
3060 os_free(hdr);
3061
3062 return res;
3063 }
3064
3065
3066 static u32 sta_flags_nl80211(int flags)
3067 {
3068 u32 f = 0;
3069
3070 if (flags & WPA_STA_AUTHORIZED)
3071 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3072 if (flags & WPA_STA_WMM)
3073 f |= BIT(NL80211_STA_FLAG_WME);
3074 if (flags & WPA_STA_SHORT_PREAMBLE)
3075 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3076 if (flags & WPA_STA_MFP)
3077 f |= BIT(NL80211_STA_FLAG_MFP);
3078
3079 return f;
3080 }
3081
3082
3083 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3084 int total_flags, int flags_or,
3085 int flags_and)
3086 {
3087 struct wpa_driver_nl80211_data *drv = priv;
3088 struct nl_msg *msg, *flags = NULL;
3089 struct nl80211_sta_flag_update upd;
3090
3091 msg = nlmsg_alloc();
3092 if (!msg)
3093 return -ENOMEM;
3094
3095 flags = nlmsg_alloc();
3096 if (!flags) {
3097 nlmsg_free(msg);
3098 return -ENOMEM;
3099 }
3100
3101 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3102 0, NL80211_CMD_SET_STATION, 0);
3103
3104 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3105 if_nametoindex(drv->ifname));
3106 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3107
3108 /*
3109 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3110 * can be removed eventually.
3111 */
3112 if (total_flags & WPA_STA_AUTHORIZED)
3113 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3114
3115 if (total_flags & WPA_STA_WMM)
3116 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3117
3118 if (total_flags & WPA_STA_SHORT_PREAMBLE)
3119 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3120
3121 if (total_flags & WPA_STA_MFP)
3122 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3123
3124 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3125 goto nla_put_failure;
3126
3127 os_memset(&upd, 0, sizeof(upd));
3128 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3129 upd.set = sta_flags_nl80211(flags_or);
3130 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3131
3132 nlmsg_free(flags);
3133
3134 return send_and_recv_msgs(drv, msg, NULL, NULL);
3135 nla_put_failure:
3136 nlmsg_free(flags);
3137 return -ENOBUFS;
3138 }
3139
3140
3141 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3142 struct wpa_driver_associate_params *params)
3143 {
3144 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3145 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3146 nl80211_remove_monitor_interface(drv);
3147 return -1;
3148 }
3149
3150 /* TODO: setup monitor interface (and add code somewhere to remove this
3151 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3152
3153 return 0;
3154 }
3155
3156
3157 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3158 {
3159 struct nl_msg *msg;
3160 int ret = -1;
3161
3162 msg = nlmsg_alloc();
3163 if (!msg)
3164 return -1;
3165
3166 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3167 NL80211_CMD_LEAVE_IBSS, 0);
3168 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3169 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3170 msg = NULL;
3171 if (ret) {
3172 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3173 "(%s)", ret, strerror(-ret));
3174 goto nla_put_failure;
3175 }
3176
3177 ret = 0;
3178 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3179
3180 nla_put_failure:
3181 nlmsg_free(msg);
3182 return ret;
3183 }
3184
3185
3186 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3187 struct wpa_driver_associate_params *params)
3188 {
3189 struct nl_msg *msg;
3190 int ret = -1;
3191 int count = 0;
3192
3193 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3194
3195 if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3196 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3197 "IBSS mode");
3198 return -1;
3199 }
3200
3201 retry:
3202 msg = nlmsg_alloc();
3203 if (!msg)
3204 return -1;
3205
3206 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3207 NL80211_CMD_JOIN_IBSS, 0);
3208 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3209
3210 if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3211 goto nla_put_failure;
3212
3213 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3214 params->ssid, params->ssid_len);
3215 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3216 params->ssid);
3217 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3218 drv->ssid_len = params->ssid_len;
3219
3220 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3221 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3222
3223 ret = nl80211_set_conn_keys(params, msg);
3224 if (ret)
3225 goto nla_put_failure;
3226
3227 if (params->wpa_ie) {
3228 wpa_hexdump(MSG_DEBUG,
3229 " * Extra IEs for Beacon/Probe Response frames",
3230 params->wpa_ie, params->wpa_ie_len);
3231 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3232 params->wpa_ie);
3233 }
3234
3235 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3236 msg = NULL;
3237 if (ret) {
3238 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3239 ret, strerror(-ret));
3240 count++;
3241 if (ret == -EALREADY && count == 1) {
3242 wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3243 "forced leave");
3244 nl80211_leave_ibss(drv);
3245 nlmsg_free(msg);
3246 goto retry;
3247 }
3248
3249 goto nla_put_failure;
3250 }
3251 ret = 0;
3252 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3253
3254 nla_put_failure:
3255 nlmsg_free(msg);
3256 return ret;
3257 }
3258
3259
3260 static int wpa_driver_nl80211_connect(
3261 struct wpa_driver_nl80211_data *drv,
3262 struct wpa_driver_associate_params *params)
3263 {
3264 struct nl_msg *msg;
3265 enum nl80211_auth_type type;
3266 int ret = 0;
3267
3268 msg = nlmsg_alloc();
3269 if (!msg)
3270 return -1;
3271
3272 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3273 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3274 NL80211_CMD_CONNECT, 0);
3275
3276 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3277 if (params->bssid) {
3278 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3279 MAC2STR(params->bssid));
3280 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3281 }
3282 if (params->freq) {
3283 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3284 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3285 }
3286 if (params->ssid) {
3287 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3288 params->ssid, params->ssid_len);
3289 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3290 params->ssid);
3291 if (params->ssid_len > sizeof(drv->ssid))
3292 goto nla_put_failure;
3293 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3294 drv->ssid_len = params->ssid_len;
3295 }
3296 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3297 if (params->wpa_ie)
3298 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3299 params->wpa_ie);
3300
3301 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3302 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3303 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3304 type = NL80211_AUTHTYPE_SHARED_KEY;
3305 else if (params->auth_alg & AUTH_ALG_LEAP)
3306 type = NL80211_AUTHTYPE_NETWORK_EAP;
3307 else if (params->auth_alg & AUTH_ALG_FT)
3308 type = NL80211_AUTHTYPE_FT;
3309 else
3310 goto nla_put_failure;
3311
3312 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3313 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3314
3315 if (params->wpa_ie && params->wpa_ie_len) {
3316 enum nl80211_wpa_versions ver;
3317
3318 if (params->wpa_ie[0] == WLAN_EID_RSN)
3319 ver = NL80211_WPA_VERSION_2;
3320 else
3321 ver = NL80211_WPA_VERSION_1;
3322
3323 wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
3324 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3325 }
3326
3327 if (params->pairwise_suite != CIPHER_NONE) {
3328 int cipher;
3329
3330 switch (params->pairwise_suite) {
3331 case CIPHER_WEP40:
3332 cipher = WLAN_CIPHER_SUITE_WEP40;
3333 break;
3334 case CIPHER_WEP104:
3335 cipher = WLAN_CIPHER_SUITE_WEP104;
3336 break;
3337 case CIPHER_CCMP:
3338 cipher = WLAN_CIPHER_SUITE_CCMP;
3339 break;
3340 case CIPHER_TKIP:
3341 default:
3342 cipher = WLAN_CIPHER_SUITE_TKIP;
3343 break;
3344 }
3345 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3346 }
3347
3348 if (params->group_suite != CIPHER_NONE) {
3349 int cipher;
3350
3351 switch (params->group_suite) {
3352 case CIPHER_WEP40:
3353 cipher = WLAN_CIPHER_SUITE_WEP40;
3354 break;
3355 case CIPHER_WEP104:
3356 cipher = WLAN_CIPHER_SUITE_WEP104;
3357 break;
3358 case CIPHER_CCMP:
3359 cipher = WLAN_CIPHER_SUITE_CCMP;
3360 break;
3361 case CIPHER_TKIP:
3362 default:
3363 cipher = WLAN_CIPHER_SUITE_TKIP;
3364 break;
3365 }
3366 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3367 }
3368
3369 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3370 params->key_mgmt_suite == KEY_MGMT_PSK) {
3371 int mgmt = WLAN_AKM_SUITE_PSK;
3372
3373 switch (params->key_mgmt_suite) {
3374 case KEY_MGMT_802_1X:
3375 mgmt = WLAN_AKM_SUITE_8021X;
3376 break;
3377 case KEY_MGMT_PSK:
3378 default:
3379 mgmt = WLAN_AKM_SUITE_PSK;
3380 break;
3381 }
3382 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3383 }
3384
3385 ret = nl80211_set_conn_keys(params, msg);
3386 if (ret)
3387 goto nla_put_failure;
3388
3389 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3390 msg = NULL;
3391 if (ret) {
3392 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3393 "(%s)", ret, strerror(-ret));
3394 goto nla_put_failure;
3395 }
3396 ret = 0;
3397 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3398
3399 nla_put_failure:
3400 nlmsg_free(msg);
3401 return ret;
3402
3403 }
3404
3405
3406 static int wpa_driver_nl80211_associate(
3407 void *priv, struct wpa_driver_associate_params *params)
3408 {
3409 struct wpa_driver_nl80211_data *drv = priv;
3410 int ret = -1;
3411 struct nl_msg *msg;
3412
3413 if (params->mode == IEEE80211_MODE_AP)
3414 return wpa_driver_nl80211_ap(drv, params);
3415
3416 if (params->mode == IEEE80211_MODE_IBSS)
3417 return wpa_driver_nl80211_ibss(drv, params);
3418
3419 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3420 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3421 return -1;
3422 return wpa_driver_nl80211_connect(drv, params);
3423 }
3424
3425 drv->associated = 0;
3426
3427 msg = nlmsg_alloc();
3428 if (!msg)
3429 return -1;
3430
3431 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3432 drv->ifindex);
3433 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3434 NL80211_CMD_ASSOCIATE, 0);
3435
3436 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3437 if (params->bssid) {
3438 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3439 MAC2STR(params->bssid));
3440 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3441 }
3442 if (params->freq) {
3443 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3444 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3445 }
3446 if (params->ssid) {
3447 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3448 params->ssid, params->ssid_len);
3449 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3450 params->ssid);
3451 if (params->ssid_len > sizeof(drv->ssid))
3452 goto nla_put_failure;
3453 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3454 drv->ssid_len = params->ssid_len;
3455 }
3456 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3457 if (params->wpa_ie)
3458 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3459 params->wpa_ie);
3460
3461 #ifdef CONFIG_IEEE80211W
3462 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3463 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3464 #endif /* CONFIG_IEEE80211W */
3465
3466 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3467
3468 if (params->prev_bssid) {
3469 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
3470 MAC2STR(params->prev_bssid));
3471 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3472 params->prev_bssid);
3473 }
3474
3475 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3476 msg = NULL;
3477 if (ret) {
3478 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3479 "(%s)", ret, strerror(-ret));
3480 goto nla_put_failure;
3481 }
3482 ret = 0;
3483 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3484 "successfully");
3485
3486 nla_put_failure:
3487 nlmsg_free(msg);
3488 return ret;
3489 }
3490
3491
3492 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3493 int ifindex, int mode)
3494 {
3495 struct nl_msg *msg;
3496 int ret = -ENOBUFS;
3497
3498 msg = nlmsg_alloc();
3499 if (!msg)
3500 return -ENOMEM;
3501
3502 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3503 0, NL80211_CMD_SET_INTERFACE, 0);
3504 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3505 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3506
3507 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3508 if (!ret)
3509 return 0;
3510 nla_put_failure:
3511 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3512 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3513 return ret;
3514 }
3515
3516
3517 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3518 {
3519 struct wpa_driver_nl80211_data *drv = priv;
3520 int ret = -1;
3521 int nlmode;
3522
3523 switch (mode) {
3524 case 0:
3525 nlmode = NL80211_IFTYPE_STATION;
3526 break;
3527 case 1:
3528 nlmode = NL80211_IFTYPE_ADHOC;
3529 break;
3530 case 2:
3531 nlmode = NL80211_IFTYPE_AP;
3532 break;
3533 default:
3534 return -1;
3535 }
3536
3537 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3538 drv->nlmode = nlmode;
3539 ret = 0;
3540 goto done;
3541 }
3542
3543 if (nlmode == drv->nlmode) {
3544 ret = 0;
3545 goto done; /* Already in the requested mode */
3546 }
3547
3548 /* mac80211 doesn't allow mode changes while the device is up, so
3549 * take the device down, try to set the mode again, and bring the
3550 * device back up.
3551 */
3552 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3553 /* Try to set the mode again while the interface is down */
3554 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3555 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3556 ret = -1;
3557 }
3558
3559 if (!ret)
3560 drv->nlmode = nlmode;
3561
3562 done:
3563 if (!ret && nlmode == NL80211_IFTYPE_AP) {
3564 /* Setup additional AP mode functionality if needed */
3565 if (drv->monitor_ifidx < 0 &&
3566 nl80211_create_monitor_interface(drv))
3567 return -1;
3568 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3569 /* Remove additional AP mode functionality */
3570 nl80211_remove_monitor_interface(drv);
3571 }
3572
3573 return ret;
3574 }
3575
3576
3577 static int wpa_driver_nl80211_get_capa(void *priv,
3578 struct wpa_driver_capa *capa)
3579 {
3580 struct wpa_driver_nl80211_data *drv = priv;
3581 if (!drv->has_capability)
3582 return -1;
3583 os_memcpy(capa, &drv->capa, sizeof(*capa));
3584 return 0;
3585 }
3586
3587
3588 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3589 {
3590 struct wpa_driver_nl80211_data *drv = priv;
3591
3592 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3593 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3594 drv->operstate = state;
3595 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3596 state ? IF_OPER_UP : IF_OPER_DORMANT);
3597 }
3598
3599
3600 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3601 {
3602 struct wpa_driver_nl80211_data *drv = priv;
3603 struct nl_msg *msg;
3604 struct nl80211_sta_flag_update upd;
3605
3606 msg = nlmsg_alloc();
3607 if (!msg)
3608 return -ENOMEM;
3609
3610 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3611 0, NL80211_CMD_SET_STATION, 0);
3612
3613 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3614 if_nametoindex(drv->ifname));
3615 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3616
3617 os_memset(&upd, 0, sizeof(upd));
3618 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3619 if (authorized)
3620 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3621 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3622
3623 return send_and_recv_msgs(drv, msg, NULL, NULL);
3624 nla_put_failure:
3625 return -ENOBUFS;
3626 }
3627
3628
3629 #ifdef HOSTAPD
3630
3631 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3632 int ifindex)
3633 {
3634 struct i802_bss *bss = &drv->bss;
3635 while (bss) {
3636 if (ifindex == bss->ifindex)
3637 return bss;
3638 bss = bss->next;
3639 }
3640 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3641 return NULL;
3642 }
3643
3644
3645 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3646 {
3647 int i;
3648 int *old;
3649
3650 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3651 ifidx);
3652 for (i = 0; i < drv->num_if_indices; i++) {
3653 if (drv->if_indices[i] == 0) {
3654 drv->if_indices[i] = ifidx;
3655 return;
3656 }
3657 }
3658
3659 if (drv->if_indices != drv->default_if_indices)
3660 old = drv->if_indices;
3661 else
3662 old = NULL;
3663
3664 drv->if_indices = os_realloc(old,
3665 sizeof(int) * (drv->num_if_indices + 1));
3666 if (!drv->if_indices) {
3667 if (!old)
3668 drv->if_indices = drv->default_if_indices;
3669 else
3670 drv->if_indices = old;
3671 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3672 "interfaces");
3673 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3674 return;
3675 }
3676 drv->if_indices[drv->num_if_indices] = ifidx;
3677 drv->num_if_indices++;
3678 }
3679
3680
3681 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3682 {
3683 int i;
3684
3685 for (i = 0; i < drv->num_if_indices; i++) {
3686 if (drv->if_indices[i] == ifidx) {
3687 drv->if_indices[i] = 0;
3688 break;
3689 }
3690 }
3691 }
3692
3693
3694 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3695 {
3696 int i;
3697
3698 for (i = 0; i < drv->num_if_indices; i++)
3699 if (drv->if_indices[i] == ifidx)
3700 return 1;
3701
3702 return 0;
3703 }
3704
3705
3706 static inline int min_int(int a, int b)
3707 {
3708 if (a < b)
3709 return a;
3710 return b;
3711 }
3712
3713
3714 static int get_key_handler(struct nl_msg *msg, void *arg)
3715 {
3716 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3717 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3718
3719 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3720 genlmsg_attrlen(gnlh, 0), NULL);
3721
3722 /*
3723 * TODO: validate the key index and mac address!
3724 * Otherwise, there's a race condition as soon as
3725 * the kernel starts sending key notifications.
3726 */
3727
3728 if (tb[NL80211_ATTR_KEY_SEQ])
3729 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3730 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3731 return NL_SKIP;
3732 }
3733
3734
3735 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3736 int idx, u8 *seq)
3737 {
3738 struct wpa_driver_nl80211_data *drv = priv;
3739 struct nl_msg *msg;
3740
3741 msg = nlmsg_alloc();
3742 if (!msg)
3743 return -ENOMEM;
3744
3745 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3746 0, NL80211_CMD_GET_KEY, 0);
3747
3748 if (addr)
3749 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3750 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3751 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3752
3753 memset(seq, 0, 6);
3754
3755 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3756 nla_put_failure:
3757 return -ENOBUFS;
3758 }
3759
3760
3761 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3762 int mode)
3763 {
3764 struct wpa_driver_nl80211_data *drv = priv;
3765 struct nl_msg *msg;
3766 u8 rates[NL80211_MAX_SUPP_RATES];
3767 u8 rates_len = 0;
3768 int i;
3769
3770 msg = nlmsg_alloc();
3771 if (!msg)
3772 return -ENOMEM;
3773
3774 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3775 NL80211_CMD_SET_BSS, 0);
3776
3777 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3778 rates[rates_len++] = basic_rates[i] / 5;
3779
3780 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3781
3782 /* TODO: multi-BSS support */
3783 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3784
3785 return send_and_recv_msgs(drv, msg, NULL, NULL);
3786 nla_put_failure:
3787 return -ENOBUFS;
3788 }
3789
3790
3791 /* Set kernel driver on given frequency (MHz) */
3792 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3793 {
3794 struct wpa_driver_nl80211_data *drv = priv;
3795 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3796 freq->sec_channel_offset);
3797 }
3798
3799
3800 static int i802_set_rts(void *priv, int rts)
3801 {
3802 struct wpa_driver_nl80211_data *drv = priv;
3803 struct nl_msg *msg;
3804 int ret = -ENOBUFS;
3805 u32 val;
3806
3807 msg = nlmsg_alloc();
3808 if (!msg)
3809 return -ENOMEM;
3810
3811 if (rts >= 2347)
3812 val = (u32) -1;
3813 else
3814 val = rts;
3815
3816 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3817 0, NL80211_CMD_SET_WIPHY, 0);
3818 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3819 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3820
3821 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3822 if (!ret)
3823 return 0;
3824 nla_put_failure:
3825 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3826 "%d (%s)", rts, ret, strerror(-ret));
3827 return ret;
3828 }
3829
3830
3831 static int i802_set_frag(void *priv, int frag)
3832 {
3833 struct wpa_driver_nl80211_data *drv = priv;
3834 struct nl_msg *msg;
3835 int ret = -ENOBUFS;
3836 u32 val;
3837
3838 msg = nlmsg_alloc();
3839 if (!msg)
3840 return -ENOMEM;
3841
3842 if (frag >= 2346)
3843 val = (u32) -1;
3844 else
3845 val = frag;
3846
3847 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3848 0, NL80211_CMD_SET_WIPHY, 0);
3849 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3850 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3851
3852 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3853 if (!ret)
3854 return 0;
3855 nla_put_failure:
3856 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3857 "%d: %d (%s)", frag, ret, strerror(-ret));
3858 return ret;
3859 }
3860
3861
3862 static int i802_flush(void *priv)
3863 {
3864 struct wpa_driver_nl80211_data *drv = priv;
3865 struct nl_msg *msg;
3866
3867 msg = nlmsg_alloc();
3868 if (!msg)
3869 return -1;
3870
3871 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3872 0, NL80211_CMD_DEL_STATION, 0);
3873
3874 /*
3875 * XXX: FIX! this needs to flush all VLANs too
3876 */
3877 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3878 if_nametoindex(drv->ifname));
3879
3880 return send_and_recv_msgs(drv, msg, NULL, NULL);
3881 nla_put_failure:
3882 return -ENOBUFS;
3883 }
3884
3885
3886 static int get_sta_handler(struct nl_msg *msg, void *arg)
3887 {
3888 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3889 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3890 struct hostap_sta_driver_data *data = arg;
3891 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3892 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3893 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3894 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3895 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3896 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3897 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3898 };
3899
3900 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3901 genlmsg_attrlen(gnlh, 0), NULL);
3902
3903 /*
3904 * TODO: validate the interface and mac address!
3905 * Otherwise, there's a race condition as soon as
3906 * the kernel starts sending station notifications.
3907 */
3908
3909 if (!tb[NL80211_ATTR_STA_INFO]) {
3910 wpa_printf(MSG_DEBUG, "sta stats missing!");
3911 return NL_SKIP;
3912 }
3913 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3914 tb[NL80211_ATTR_STA_INFO],
3915 stats_policy)) {
3916 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3917 return NL_SKIP;
3918 }
3919
3920 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3921 data->inactive_msec =
3922 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3923 if (stats[NL80211_STA_INFO_RX_BYTES])
3924 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3925 if (stats[NL80211_STA_INFO_TX_BYTES])
3926 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3927 if (stats[NL80211_STA_INFO_RX_PACKETS])
3928 data->rx_packets =
3929 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3930 if (stats[NL80211_STA_INFO_TX_PACKETS])
3931 data->tx_packets =
3932 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3933
3934 return NL_SKIP;
3935 }
3936
3937 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3938 const u8 *addr)
3939 {
3940 struct wpa_driver_nl80211_data *drv = priv;
3941 struct nl_msg *msg;
3942
3943 os_memset(data, 0, sizeof(*data));
3944 msg = nlmsg_alloc();
3945 if (!msg)
3946 return -ENOMEM;
3947
3948 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3949 0, NL80211_CMD_GET_STATION, 0);
3950
3951 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3952 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3953
3954 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3955 nla_put_failure:
3956 return -ENOBUFS;
3957 }
3958
3959
3960 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3961 int cw_min, int cw_max, int burst_time)
3962 {
3963 struct wpa_driver_nl80211_data *drv = priv;
3964 struct nl_msg *msg;
3965 struct nlattr *txq, *params;
3966
3967 msg = nlmsg_alloc();
3968 if (!msg)
3969 return -1;
3970
3971 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3972 0, NL80211_CMD_SET_WIPHY, 0);
3973
3974 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3975
3976 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3977 if (!txq)
3978 goto nla_put_failure;
3979
3980 /* We are only sending parameters for a single TXQ at a time */
3981 params = nla_nest_start(msg, 1);
3982 if (!params)
3983 goto nla_put_failure;
3984
3985 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3986 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3987 * 32 usec, so need to convert the value here. */
3988 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3989 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3990 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3991 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3992
3993 nla_nest_end(msg, params);
3994
3995 nla_nest_end(msg, txq);
3996
3997 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3998 return 0;
3999 nla_put_failure:
4000 return -1;
4001 }
4002
4003
4004 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4005 {
4006 struct wpa_driver_nl80211_data *drv = priv;
4007 struct nl_msg *msg;
4008
4009 msg = nlmsg_alloc();
4010 if (!msg)
4011 return -ENOMEM;
4012
4013 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4014 NL80211_CMD_SET_BSS, 0);
4015
4016 if (cts >= 0)
4017 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4018 if (preamble >= 0)
4019 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4020 if (slot >= 0)
4021 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4022
4023 /* TODO: multi-BSS support */
4024 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4025
4026 return send_and_recv_msgs(drv, msg, NULL, NULL);
4027 nla_put_failure:
4028 return -ENOBUFS;
4029 }
4030
4031
4032 static int i802_set_cts_protect(void *priv, int value)
4033 {
4034 return i802_set_bss(priv, value, -1, -1);
4035 }
4036
4037
4038 static int i802_set_preamble(void *priv, int value)
4039 {
4040 return i802_set_bss(priv, -1, value, -1);
4041 }
4042
4043
4044 static int i802_set_short_slot_time(void *priv, int value)
4045 {
4046 return i802_set_bss(priv, -1, -1, value);
4047 }
4048
4049
4050 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4051 const char *ifname, int vlan_id)
4052 {
4053 struct wpa_driver_nl80211_data *drv = priv;
4054 struct nl_msg *msg;
4055
4056 msg = nlmsg_alloc();
4057 if (!msg)
4058 return -ENOMEM;
4059
4060 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4061 0, NL80211_CMD_SET_STATION, 0);
4062
4063 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4064 if_nametoindex(drv->ifname));
4065 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4066 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4067 if_nametoindex(ifname));
4068
4069 return send_and_recv_msgs(drv, msg, NULL, NULL);
4070 nla_put_failure:
4071 return -ENOBUFS;
4072 }
4073
4074
4075 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4076 {
4077 struct wpa_driver_nl80211_data *drv = priv;
4078 char name[16];
4079
4080 os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4081 if (val) {
4082 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4083 NULL, 1) < 0)
4084 return -1;
4085 hostapd_set_iface_flags(drv, name, 1);
4086 return i802_set_sta_vlan(priv, addr, name, 0);
4087 } else {
4088 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4089 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4090 name);
4091 }
4092 }
4093
4094
4095 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4096 {
4097 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4098 struct sockaddr_ll lladdr;
4099 unsigned char buf[3000];
4100 int len;
4101 socklen_t fromlen = sizeof(lladdr);
4102
4103 len = recvfrom(sock, buf, sizeof(buf), 0,
4104 (struct sockaddr *)&lladdr, &fromlen);
4105 if (len < 0) {
4106 perror("recv");
4107 return;
4108 }
4109
4110 if (have_ifidx(drv, lladdr.sll_ifindex)) {
4111 void *ctx;
4112 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4113 if (!ctx)
4114 return;
4115 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4116 }
4117 }
4118
4119
4120 static int i802_get_inact_sec(void *priv, const u8 *addr)
4121 {
4122 struct hostap_sta_driver_data data;
4123 int ret;
4124
4125 data.inactive_msec = (unsigned long) -1;
4126 ret = i802_read_sta_data(priv, &data, addr);
4127 if (ret || data.inactive_msec == (unsigned long) -1)
4128 return -1;
4129 return data.inactive_msec / 1000;
4130 }
4131
4132
4133 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4134 {
4135 #if 0
4136 /* TODO */
4137 #endif
4138 return 0;
4139 }
4140
4141
4142 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4143 int reason)
4144 {
4145 struct wpa_driver_nl80211_data *drv = priv;
4146 struct ieee80211_mgmt mgmt;
4147
4148 memset(&mgmt, 0, sizeof(mgmt));
4149 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4150 WLAN_FC_STYPE_DEAUTH);
4151 memcpy(mgmt.da, addr, ETH_ALEN);
4152 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4153 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4154 mgmt.u.deauth.reason_code = host_to_le16(reason);
4155 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4156 IEEE80211_HDRLEN +
4157 sizeof(mgmt.u.deauth));
4158 }
4159
4160
4161 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4162 int reason)
4163 {
4164 struct wpa_driver_nl80211_data *drv = priv;
4165 struct ieee80211_mgmt mgmt;
4166
4167 memset(&mgmt, 0, sizeof(mgmt));
4168 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4169 WLAN_FC_STYPE_DISASSOC);
4170 memcpy(mgmt.da, addr, ETH_ALEN);
4171 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4172 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4173 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4174 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4175 IEEE80211_HDRLEN +
4176 sizeof(mgmt.u.disassoc));
4177 }
4178
4179
4180 static void *i802_init(struct hostapd_data *hapd,
4181 struct wpa_init_params *params)
4182 {
4183 struct wpa_driver_nl80211_data *drv;
4184 size_t i;
4185
4186 drv = wpa_driver_nl80211_init(hapd, params->ifname);
4187 if (drv == NULL)
4188 return NULL;
4189
4190 drv->bss.ifindex = drv->ifindex;
4191
4192 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4193 drv->if_indices = drv->default_if_indices;
4194 for (i = 0; i < params->num_bridge; i++) {
4195 if (params->bridge[i])
4196 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4197 }
4198
4199 /* start listening for EAPOL on the default AP interface */
4200 add_ifidx(drv, drv->ifindex);
4201
4202 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4203 goto failed;
4204
4205 if (params->bssid) {
4206 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4207 goto failed;
4208 }
4209
4210 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4211 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4212 "into AP mode", drv->ifname);
4213 goto failed;
4214 }
4215
4216 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4217 goto failed;
4218
4219 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4220 if (drv->eapol_sock < 0) {
4221 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4222 goto failed;
4223 }
4224
4225 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4226 {
4227 printf("Could not register read socket for eapol\n");
4228 goto failed;
4229 }
4230
4231 if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4232 goto failed;
4233
4234 return drv;
4235
4236 failed:
4237 nl80211_remove_monitor_interface(drv);
4238 if (drv->ioctl_sock >= 0)
4239 close(drv->ioctl_sock);
4240
4241 genl_family_put(drv->nl80211);
4242 nl_cache_free(drv->nl_cache);
4243 nl_handle_destroy(drv->nl_handle);
4244 nl_cb_put(drv->nl_cb);
4245
4246 os_free(drv);
4247 return NULL;
4248 }
4249
4250
4251 static void i802_deinit(void *priv)
4252 {
4253 wpa_driver_nl80211_deinit(priv);
4254 }
4255
4256 #endif /* HOSTAPD */
4257
4258
4259 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4260 enum wpa_driver_if_type type)
4261 {
4262 switch (type) {
4263 case WPA_IF_STATION:
4264 return NL80211_IFTYPE_STATION;
4265 case WPA_IF_AP_VLAN:
4266 return NL80211_IFTYPE_AP_VLAN;
4267 case WPA_IF_AP_BSS:
4268 return NL80211_IFTYPE_AP;
4269 }
4270 return -1;
4271 }
4272
4273
4274 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4275 enum wpa_driver_if_type type,
4276 const char *ifname, const u8 *addr,
4277 void *bss_ctx)
4278 {
4279 struct wpa_driver_nl80211_data *drv = priv;
4280 int ifidx;
4281 #ifdef HOSTAPD
4282 struct i802_bss *bss = NULL;
4283
4284 if (type == WPA_IF_AP_BSS) {
4285 bss = os_zalloc(sizeof(*bss));
4286 if (bss == NULL)
4287 return -1;
4288 }
4289 #endif /* HOSTAPD */
4290
4291 ifidx = nl80211_create_iface(drv, ifname,
4292 wpa_driver_nl80211_if_type(type), addr,
4293 0);
4294 if (ifidx < 0) {
4295 #ifdef HOSTAPD
4296 os_free(bss);
4297 #endif /* HOSTAPD */
4298 return -1;
4299 }
4300
4301 #ifdef HOSTAPD
4302 if (type == WPA_IF_AP_BSS) {
4303 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4304 nl80211_remove_iface(priv, ifidx);
4305 os_free(bss);
4306 return -1;
4307 }
4308 bss->ifindex = ifidx;
4309 bss->next = drv->bss.next;
4310 drv->bss.next = bss;
4311 }
4312 #endif /* HOSTAPD */
4313
4314 return 0;
4315 }
4316
4317
4318 static int wpa_driver_nl80211_if_remove(void *priv,
4319 enum wpa_driver_if_type type,
4320 const char *ifname)
4321 {
4322 struct wpa_driver_nl80211_data *drv = priv;
4323 int ifindex = if_nametoindex(ifname);
4324
4325 nl80211_remove_iface(drv, ifindex);
4326
4327 #ifdef HOSTAPD
4328 if (type == WPA_IF_AP_BSS) {
4329 struct i802_bss *bss, *prev;
4330 prev = &drv->bss;
4331 bss = drv->bss.next;
4332 while (bss) {
4333 if (ifindex == bss->ifindex) {
4334 prev->next = bss->next;
4335 os_free(bss);
4336 break;
4337 }
4338 prev = bss;
4339 bss = bss->next;
4340 }
4341 }
4342 #endif /* HOSTAPD */
4343
4344 return 0;
4345 }
4346
4347
4348 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4349 .name = "nl80211",
4350 .desc = "Linux nl80211/cfg80211",
4351 .get_bssid = wpa_driver_nl80211_get_bssid,
4352 .get_ssid = wpa_driver_nl80211_get_ssid,
4353 .set_key = wpa_driver_nl80211_set_key,
4354 .scan2 = wpa_driver_nl80211_scan,
4355 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4356 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4357 .disassociate = wpa_driver_nl80211_disassociate,
4358 .authenticate = wpa_driver_nl80211_authenticate,
4359 .associate = wpa_driver_nl80211_associate,
4360 .init = wpa_driver_nl80211_init,
4361 .deinit = wpa_driver_nl80211_deinit,
4362 .get_capa = wpa_driver_nl80211_get_capa,
4363 .set_operstate = wpa_driver_nl80211_set_operstate,
4364 .set_supp_port = wpa_driver_nl80211_set_supp_port,
4365 .set_country = wpa_driver_nl80211_set_country,
4366 .set_beacon = wpa_driver_nl80211_set_beacon,
4367 .if_add = wpa_driver_nl80211_if_add,
4368 .if_remove = wpa_driver_nl80211_if_remove,
4369 .send_mlme = wpa_driver_nl80211_send_mlme,
4370 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4371 .sta_add = wpa_driver_nl80211_sta_add,
4372 .sta_remove = wpa_driver_nl80211_sta_remove,
4373 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4374 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4375 #ifdef HOSTAPD
4376 .hapd_init = i802_init,
4377 .hapd_deinit = i802_deinit,
4378 .get_seqnum = i802_get_seqnum,
4379 .flush = i802_flush,
4380 .read_sta_data = i802_read_sta_data,
4381 .sta_deauth = i802_sta_deauth,
4382 .sta_disassoc = i802_sta_disassoc,
4383 .get_inact_sec = i802_get_inact_sec,
4384 .sta_clear_stats = i802_sta_clear_stats,
4385 .set_freq = i802_set_freq,
4386 .set_rts = i802_set_rts,
4387 .set_frag = i802_set_frag,
4388 .set_rate_sets = i802_set_rate_sets,
4389 .set_cts_protect = i802_set_cts_protect,
4390 .set_preamble = i802_set_preamble,
4391 .set_short_slot_time = i802_set_short_slot_time,
4392 .set_tx_queue_params = i802_set_tx_queue_params,
4393 .set_sta_vlan = i802_set_sta_vlan,
4394 .set_wds_sta = i802_set_wds_sta,
4395 #endif /* HOSTAPD */
4396 };