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Clean up HT40 scan and share nl80211 scanning code
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <net/if_arp.h>
22 #include <netlink/genl/genl.h>
23 #include <netlink/genl/family.h>
24 #include <netlink/genl/ctrl.h>
25 #include "nl80211_copy.h"
26 #include "wireless_copy.h"
27
28 #include "common.h"
29 #include "driver.h"
30 #include "eloop.h"
31 #include "ieee802_11_defs.h"
32
33 #if defined(CONFIG_AP) || defined(HOSTAPD)
34 #include <netpacket/packet.h>
35 #include <linux/filter.h>
36 #include "radiotap.h"
37 #include "radiotap_iter.h"
38 #endif /* CONFIG_AP || HOSTAPD */
39
40 #ifdef CONFIG_AP
41
42 #include "../hostapd/hostapd_defs.h"
43
44 #ifndef ETH_P_ALL
45 #define ETH_P_ALL 0x0003
46 #endif
47
48 #endif /* CONFIG_AP */
49
50 #ifdef HOSTAPD
51 #include "../../hostapd/hostapd.h"
52 #include "../../hostapd/sta_flags.h"
53 #include "ieee802_11_common.h"
54
55 #ifdef CONFIG_LIBNL20
56 /* libnl 2.0 compatibility code */
57 #define nl_handle_alloc_cb nl_socket_alloc_cb
58 #define nl_handle_destroy nl_socket_free
59 #endif /* CONFIG_LIBNL20 */
60
61 #endif /* HOSTAPD */
62
63
64 #ifndef IFF_LOWER_UP
65 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
66 #endif
67 #ifndef IFF_DORMANT
68 #define IFF_DORMANT 0x20000 /* driver signals dormant */
69 #endif
70
71 #ifndef IF_OPER_DORMANT
72 #define IF_OPER_DORMANT 5
73 #endif
74 #ifndef IF_OPER_UP
75 #define IF_OPER_UP 6
76 #endif
77
78 enum ieee80211_msg_type {
79 ieee80211_msg_normal = 0,
80 ieee80211_msg_tx_callback_ack = 1,
81 ieee80211_msg_tx_callback_fail = 2,
82 };
83
84 struct i802_bss {
85 struct i802_bss *next;
86 int ifindex;
87 unsigned int beacon_set:1;
88 };
89
90 struct wpa_driver_nl80211_data {
91 void *ctx;
92 int link_event_sock;
93 int ioctl_sock; /* socket for ioctl() use */
94 char ifname[IFNAMSIZ + 1];
95 int ifindex;
96 int if_removed;
97 struct wpa_driver_capa capa;
98 int has_capability;
99
100 int operstate;
101
102 int scan_complete_events;
103
104 struct nl_handle *nl_handle;
105 struct nl_cache *nl_cache;
106 struct nl_cb *nl_cb;
107 struct genl_family *nl80211;
108
109 u8 bssid[ETH_ALEN];
110 int associated;
111 u8 ssid[32];
112 size_t ssid_len;
113 int nlmode;
114 int ap_scan_as_station;
115
116 #if defined(CONFIG_AP) || defined(HOSTAPD)
117 int beacon_int;
118 int monitor_sock;
119 int monitor_ifidx;
120 #endif /* CONFIG_AP || HOSTAPD */
121
122 #ifdef CONFIG_AP
123 unsigned int beacon_set:1;
124 #endif /* CONFIG_AP */
125
126 #ifdef HOSTAPD
127 struct hostapd_data *hapd;
128
129 int eapol_sock; /* socket for EAPOL frames */
130
131 int default_if_indices[16];
132 int *if_indices;
133 int num_if_indices;
134
135 struct i802_bss bss;
136
137 int last_freq;
138 int last_freq_ht;
139 #endif /* HOSTAPD */
140 };
141
142
143 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
144 void *timeout_ctx);
145 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
146 static int
147 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
148
149 #ifdef CONFIG_AP
150 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
151 int ifidx);
152 #endif /* CONFIG_AP */
153
154 #ifdef HOSTAPD
155 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
156 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
157 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
158 int ifindex);
159 #endif /* HOSTAPD */
160
161
162 /* nl80211 code */
163 static int ack_handler(struct nl_msg *msg, void *arg)
164 {
165 int *err = arg;
166 *err = 0;
167 return NL_STOP;
168 }
169
170 static int finish_handler(struct nl_msg *msg, void *arg)
171 {
172 int *ret = arg;
173 *ret = 0;
174 return NL_SKIP;
175 }
176
177 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
178 void *arg)
179 {
180 int *ret = arg;
181 *ret = err->error;
182 return NL_SKIP;
183 }
184
185
186 static int no_seq_check(struct nl_msg *msg, void *arg)
187 {
188 return NL_OK;
189 }
190
191
192 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
193 struct nl_msg *msg,
194 int (*valid_handler)(struct nl_msg *, void *),
195 void *valid_data)
196 {
197 struct nl_cb *cb;
198 int err = -ENOMEM;
199
200 cb = nl_cb_clone(drv->nl_cb);
201 if (!cb)
202 goto out;
203
204 err = nl_send_auto_complete(drv->nl_handle, msg);
205 if (err < 0)
206 goto out;
207
208 err = 1;
209
210 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
211 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
212 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
213
214 if (valid_handler)
215 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
216 valid_handler, valid_data);
217
218 while (err > 0)
219 nl_recvmsgs(drv->nl_handle, cb);
220 out:
221 nl_cb_put(cb);
222 nlmsg_free(msg);
223 return err;
224 }
225
226
227 struct family_data {
228 const char *group;
229 int id;
230 };
231
232
233 static int family_handler(struct nl_msg *msg, void *arg)
234 {
235 struct family_data *res = arg;
236 struct nlattr *tb[CTRL_ATTR_MAX + 1];
237 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
238 struct nlattr *mcgrp;
239 int i;
240
241 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
242 genlmsg_attrlen(gnlh, 0), NULL);
243 if (!tb[CTRL_ATTR_MCAST_GROUPS])
244 return NL_SKIP;
245
246 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
247 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
248 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
249 nla_len(mcgrp), NULL);
250 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
251 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
252 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
253 res->group,
254 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
255 continue;
256 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
257 break;
258 };
259
260 return NL_SKIP;
261 }
262
263
264 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
265 const char *family, const char *group)
266 {
267 struct nl_msg *msg;
268 int ret = -1;
269 struct family_data res = { group, -ENOENT };
270
271 msg = nlmsg_alloc();
272 if (!msg)
273 return -ENOMEM;
274 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
275 0, 0, CTRL_CMD_GETFAMILY, 0);
276 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
277
278 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
279 msg = NULL;
280 if (ret == 0)
281 ret = res.id;
282
283 nla_put_failure:
284 nlmsg_free(msg);
285 return ret;
286 }
287
288
289 static int wpa_driver_nl80211_send_oper_ifla(
290 struct wpa_driver_nl80211_data *drv,
291 int linkmode, int operstate)
292 {
293 struct {
294 struct nlmsghdr hdr;
295 struct ifinfomsg ifinfo;
296 char opts[16];
297 } req;
298 struct rtattr *rta;
299 static int nl_seq;
300 ssize_t ret;
301
302 os_memset(&req, 0, sizeof(req));
303
304 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
305 req.hdr.nlmsg_type = RTM_SETLINK;
306 req.hdr.nlmsg_flags = NLM_F_REQUEST;
307 req.hdr.nlmsg_seq = ++nl_seq;
308 req.hdr.nlmsg_pid = 0;
309
310 req.ifinfo.ifi_family = AF_UNSPEC;
311 req.ifinfo.ifi_type = 0;
312 req.ifinfo.ifi_index = drv->ifindex;
313 req.ifinfo.ifi_flags = 0;
314 req.ifinfo.ifi_change = 0;
315
316 if (linkmode != -1) {
317 rta = (struct rtattr *)
318 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
319 rta->rta_type = IFLA_LINKMODE;
320 rta->rta_len = RTA_LENGTH(sizeof(char));
321 *((char *) RTA_DATA(rta)) = linkmode;
322 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
323 RTA_LENGTH(sizeof(char));
324 }
325 if (operstate != -1) {
326 rta = (struct rtattr *)
327 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
328 rta->rta_type = IFLA_OPERSTATE;
329 rta->rta_len = RTA_LENGTH(sizeof(char));
330 *((char *) RTA_DATA(rta)) = operstate;
331 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
332 RTA_LENGTH(sizeof(char));
333 }
334
335 wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
336 linkmode, operstate);
337
338 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
339 if (ret < 0) {
340 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
341 " %s (assume operstate is not supported)",
342 strerror(errno));
343 }
344
345 return ret < 0 ? -1 : 0;
346 }
347
348
349 static int wpa_driver_nl80211_set_auth_param(
350 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
351 {
352 struct iwreq iwr;
353 int ret = 0;
354
355 os_memset(&iwr, 0, sizeof(iwr));
356 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
357 iwr.u.param.flags = idx & IW_AUTH_INDEX;
358 iwr.u.param.value = value;
359
360 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
361 if (errno != EOPNOTSUPP) {
362 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
363 "value 0x%x) failed: %s)",
364 idx, value, strerror(errno));
365 }
366 ret = errno == EOPNOTSUPP ? -2 : -1;
367 }
368
369 return ret;
370 }
371
372
373 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
374 {
375 struct wpa_driver_nl80211_data *drv = priv;
376 if (!drv->associated)
377 return -1;
378 os_memcpy(bssid, drv->bssid, ETH_ALEN);
379 return 0;
380 }
381
382
383 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
384 {
385 struct wpa_driver_nl80211_data *drv = priv;
386 if (!drv->associated)
387 return -1;
388 os_memcpy(ssid, drv->ssid, drv->ssid_len);
389 return drv->ssid_len;
390 }
391
392
393 #ifndef HOSTAPD
394 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
395 void *ctx, char *buf, size_t len,
396 int del)
397 {
398 union wpa_event_data event;
399
400 os_memset(&event, 0, sizeof(event));
401 if (len > sizeof(event.interface_status.ifname))
402 len = sizeof(event.interface_status.ifname) - 1;
403 os_memcpy(event.interface_status.ifname, buf, len);
404 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
405 EVENT_INTERFACE_ADDED;
406
407 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
408 del ? "DEL" : "NEW",
409 event.interface_status.ifname,
410 del ? "removed" : "added");
411
412 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
413 if (del)
414 drv->if_removed = 1;
415 else
416 drv->if_removed = 0;
417 }
418
419 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
420 }
421
422
423 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
424 struct nlmsghdr *h)
425 {
426 struct ifinfomsg *ifi;
427 int attrlen, _nlmsg_len, rta_len;
428 struct rtattr *attr;
429
430 ifi = NLMSG_DATA(h);
431
432 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
433
434 attrlen = h->nlmsg_len - _nlmsg_len;
435 if (attrlen < 0)
436 return 0;
437
438 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
439
440 rta_len = RTA_ALIGN(sizeof(struct rtattr));
441 while (RTA_OK(attr, attrlen)) {
442 if (attr->rta_type == IFLA_IFNAME) {
443 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
444 == 0)
445 return 1;
446 else
447 break;
448 }
449 attr = RTA_NEXT(attr, attrlen);
450 }
451
452 return 0;
453 }
454
455
456 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
457 int ifindex, struct nlmsghdr *h)
458 {
459 if (drv->ifindex == ifindex)
460 return 1;
461
462 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
463 drv->ifindex = if_nametoindex(drv->ifname);
464 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
465 "interface");
466 wpa_driver_nl80211_finish_drv_init(drv);
467 return 1;
468 }
469
470 return 0;
471 }
472
473
474 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
475 void *ctx, struct nlmsghdr *h,
476 size_t len)
477 {
478 struct ifinfomsg *ifi;
479 int attrlen, _nlmsg_len, rta_len;
480 struct rtattr * attr;
481
482 if (len < sizeof(*ifi))
483 return;
484
485 ifi = NLMSG_DATA(h);
486
487 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
488 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
489 ifi->ifi_index);
490 return;
491 }
492
493 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
494 "(%s%s%s%s)",
495 drv->operstate, ifi->ifi_flags,
496 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
497 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
498 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
499 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
500 /*
501 * Some drivers send the association event before the operup event--in
502 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
503 * fails. This will hit us when wpa_supplicant does not need to do
504 * IEEE 802.1X authentication
505 */
506 if (drv->operstate == 1 &&
507 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
508 !(ifi->ifi_flags & IFF_RUNNING))
509 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
510
511 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
512
513 attrlen = h->nlmsg_len - _nlmsg_len;
514 if (attrlen < 0)
515 return;
516
517 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
518
519 rta_len = RTA_ALIGN(sizeof(struct rtattr));
520 while (RTA_OK(attr, attrlen)) {
521 if (attr->rta_type == IFLA_IFNAME) {
522 wpa_driver_nl80211_event_link(
523 drv, ctx,
524 ((char *) attr) + rta_len,
525 attr->rta_len - rta_len, 0);
526 }
527 attr = RTA_NEXT(attr, attrlen);
528 }
529 }
530
531
532 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
533 void *ctx, struct nlmsghdr *h,
534 size_t len)
535 {
536 struct ifinfomsg *ifi;
537 int attrlen, _nlmsg_len, rta_len;
538 struct rtattr * attr;
539
540 if (len < sizeof(*ifi))
541 return;
542
543 ifi = NLMSG_DATA(h);
544
545 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
546
547 attrlen = h->nlmsg_len - _nlmsg_len;
548 if (attrlen < 0)
549 return;
550
551 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
552
553 rta_len = RTA_ALIGN(sizeof(struct rtattr));
554 while (RTA_OK(attr, attrlen)) {
555 if (attr->rta_type == IFLA_IFNAME) {
556 wpa_driver_nl80211_event_link(
557 drv, ctx,
558 ((char *) attr) + rta_len,
559 attr->rta_len - rta_len, 1);
560 }
561 attr = RTA_NEXT(attr, attrlen);
562 }
563 }
564
565
566 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
567 void *sock_ctx)
568 {
569 char buf[8192];
570 int left;
571 struct sockaddr_nl from;
572 socklen_t fromlen;
573 struct nlmsghdr *h;
574 int max_events = 10;
575
576 try_again:
577 fromlen = sizeof(from);
578 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
579 (struct sockaddr *) &from, &fromlen);
580 if (left < 0) {
581 if (errno != EINTR && errno != EAGAIN)
582 perror("recvfrom(netlink)");
583 return;
584 }
585
586 h = (struct nlmsghdr *) buf;
587 while (left >= (int) sizeof(*h)) {
588 int len, plen;
589
590 len = h->nlmsg_len;
591 plen = len - sizeof(*h);
592 if (len > left || plen < 0) {
593 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
594 "len=%d left=%d plen=%d",
595 len, left, plen);
596 break;
597 }
598
599 switch (h->nlmsg_type) {
600 case RTM_NEWLINK:
601 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
602 h, plen);
603 break;
604 case RTM_DELLINK:
605 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
606 h, plen);
607 break;
608 }
609
610 len = NLMSG_ALIGN(len);
611 left -= len;
612 h = (struct nlmsghdr *) ((char *) h + len);
613 }
614
615 if (left > 0) {
616 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
617 "message", left);
618 }
619
620 if (--max_events > 0) {
621 /*
622 * Try to receive all events in one eloop call in order to
623 * limit race condition on cases where AssocInfo event, Assoc
624 * event, and EAPOL frames are received more or less at the
625 * same time. We want to process the event messages first
626 * before starting EAPOL processing.
627 */
628 goto try_again;
629 }
630 }
631
632
633 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
634 const u8 *frame, size_t len)
635 {
636 const struct ieee80211_mgmt *mgmt;
637 union wpa_event_data event;
638
639 mgmt = (const struct ieee80211_mgmt *) frame;
640 if (len < 24 + sizeof(mgmt->u.auth)) {
641 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
642 "frame");
643 return;
644 }
645
646 os_memset(&event, 0, sizeof(event));
647 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
648 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
649 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
650 if (len > 24 + sizeof(mgmt->u.auth)) {
651 event.auth.ies = mgmt->u.auth.variable;
652 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
653 }
654
655 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
656 }
657
658
659 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
660 const u8 *frame, size_t len)
661 {
662 const struct ieee80211_mgmt *mgmt;
663 union wpa_event_data event;
664 u16 status;
665
666 mgmt = (const struct ieee80211_mgmt *) frame;
667 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
668 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
669 "frame");
670 return;
671 }
672
673 status = le_to_host16(mgmt->u.assoc_resp.status_code);
674 if (status != WLAN_STATUS_SUCCESS) {
675 os_memset(&event, 0, sizeof(event));
676 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
677 event.assoc_reject.resp_ies =
678 (u8 *) mgmt->u.assoc_resp.variable;
679 event.assoc_reject.resp_ies_len =
680 len - 24 - sizeof(mgmt->u.assoc_resp);
681 }
682 event.assoc_reject.status_code = status;
683
684 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
685 return;
686 }
687
688 drv->associated = 1;
689 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
690
691 os_memset(&event, 0, sizeof(event));
692 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
693 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
694 event.assoc_info.resp_ies_len =
695 len - 24 - sizeof(mgmt->u.assoc_resp);
696 }
697
698 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
699 }
700
701
702 static void mlme_event(struct wpa_driver_nl80211_data *drv,
703 enum nl80211_commands cmd, struct nlattr *frame)
704 {
705 if (frame == NULL) {
706 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
707 "data", cmd);
708 return;
709 }
710
711 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
712 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
713 nla_data(frame), nla_len(frame));
714
715 switch (cmd) {
716 case NL80211_CMD_AUTHENTICATE:
717 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
718 break;
719 case NL80211_CMD_ASSOCIATE:
720 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
721 break;
722 case NL80211_CMD_DEAUTHENTICATE:
723 drv->associated = 0;
724 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
725 break;
726 case NL80211_CMD_DISASSOCIATE:
727 drv->associated = 0;
728 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
729 break;
730 default:
731 break;
732 }
733 }
734
735 #endif /* HOSTAPD */
736
737
738 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
739 struct nlattr *tb[])
740 {
741 union wpa_event_data data;
742
743 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
744 os_memset(&data, 0, sizeof(data));
745 if (tb[NL80211_ATTR_MAC]) {
746 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
747 nla_data(tb[NL80211_ATTR_MAC]),
748 nla_len(tb[NL80211_ATTR_MAC]));
749 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
750 }
751 if (tb[NL80211_ATTR_KEY_SEQ]) {
752 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
753 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
754 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
755 }
756 if (tb[NL80211_ATTR_KEY_TYPE]) {
757 enum nl80211_key_type key_type =
758 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
759 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
760 if (key_type == NL80211_KEYTYPE_PAIRWISE)
761 data.michael_mic_failure.unicast = 1;
762 } else
763 data.michael_mic_failure.unicast = 1;
764
765 if (tb[NL80211_ATTR_KEY_IDX]) {
766 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
767 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
768 }
769
770 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
771 }
772
773
774 static int process_event(struct nl_msg *msg, void *arg)
775 {
776 struct wpa_driver_nl80211_data *drv = arg;
777 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
778 struct nlattr *tb[NL80211_ATTR_MAX + 1];
779
780 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
781 genlmsg_attrlen(gnlh, 0), NULL);
782
783 if (tb[NL80211_ATTR_IFINDEX]) {
784 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
785 if (ifindex != drv->ifindex) {
786 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
787 " for foreign interface (ifindex %d)",
788 gnlh->cmd, ifindex);
789 return NL_SKIP;
790 }
791 }
792
793 if (drv->ap_scan_as_station &&
794 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
795 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
796 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
797 drv->ap_scan_as_station = 0;
798 }
799
800 switch (gnlh->cmd) {
801 case NL80211_CMD_NEW_SCAN_RESULTS:
802 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
803 drv->scan_complete_events = 1;
804 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
805 drv->ctx);
806 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
807 break;
808 case NL80211_CMD_SCAN_ABORTED:
809 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
810 /*
811 * Need to indicate that scan results are available in order
812 * not to make wpa_supplicant stop its scanning.
813 */
814 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
815 drv->ctx);
816 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
817 break;
818 #ifndef HOSTAPD
819 case NL80211_CMD_AUTHENTICATE:
820 case NL80211_CMD_ASSOCIATE:
821 case NL80211_CMD_DEAUTHENTICATE:
822 case NL80211_CMD_DISASSOCIATE:
823 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
824 break;
825 #endif /* HOSTAPD */
826 case NL80211_CMD_MICHAEL_MIC_FAILURE:
827 mlme_event_michael_mic_failure(drv, tb);
828 break;
829 default:
830 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
831 "(cmd=%d)", gnlh->cmd);
832 break;
833 }
834
835 return NL_SKIP;
836 }
837
838
839 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
840 void *sock_ctx)
841 {
842 struct nl_cb *cb;
843 struct wpa_driver_nl80211_data *drv = eloop_ctx;
844
845 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
846
847 cb = nl_cb_clone(drv->nl_cb);
848 if (!cb)
849 return;
850 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
851 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
852 nl_recvmsgs(drv->nl_handle, cb);
853 nl_cb_put(cb);
854 }
855
856
857 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
858 const char *ifname, int dev_up)
859 {
860 struct ifreq ifr;
861
862 if (drv->ioctl_sock < 0)
863 return -1;
864
865 os_memset(&ifr, 0, sizeof(ifr));
866 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
867
868 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
869 perror("ioctl[SIOCGIFFLAGS]");
870 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
871 ifname);
872 return -1;
873 }
874
875 if (dev_up) {
876 if (ifr.ifr_flags & IFF_UP)
877 return 0;
878 ifr.ifr_flags |= IFF_UP;
879 } else {
880 if (!(ifr.ifr_flags & IFF_UP))
881 return 0;
882 ifr.ifr_flags &= ~IFF_UP;
883 }
884
885 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
886 perror("ioctl[SIOCSIFFLAGS]");
887 return -1;
888 }
889
890 return 0;
891 }
892
893
894 /**
895 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
896 * @priv: driver_nl80211 private data
897 * @alpha2_arg: country to which to switch to
898 * Returns: 0 on success, -1 on failure
899 *
900 * This asks nl80211 to set the regulatory domain for given
901 * country ISO / IEC alpha2.
902 */
903 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
904 {
905 struct wpa_driver_nl80211_data *drv = priv;
906 char alpha2[3];
907 struct nl_msg *msg;
908
909 msg = nlmsg_alloc();
910 if (!msg)
911 return -ENOMEM;
912
913 alpha2[0] = alpha2_arg[0];
914 alpha2[1] = alpha2_arg[1];
915 alpha2[2] = '\0';
916
917 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
918 0, NL80211_CMD_REQ_SET_REG, 0);
919
920 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
921 if (send_and_recv_msgs(drv, msg, NULL, NULL))
922 return -EINVAL;
923 return 0;
924 nla_put_failure:
925 return -EINVAL;
926 }
927
928
929 struct wiphy_info_data {
930 int max_scan_ssids;
931 int ap_supported;
932 };
933
934
935 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
936 {
937 struct nlattr *tb[NL80211_ATTR_MAX + 1];
938 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
939 struct wiphy_info_data *info = arg;
940
941 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
942 genlmsg_attrlen(gnlh, 0), NULL);
943
944 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
945 info->max_scan_ssids =
946 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
947
948 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
949 struct nlattr *nl_mode;
950 int i;
951 nla_for_each_nested(nl_mode,
952 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
953 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
954 info->ap_supported = 1;
955 break;
956 }
957 }
958 }
959
960 return NL_SKIP;
961 }
962
963
964 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
965 struct wiphy_info_data *info)
966 {
967 struct nl_msg *msg;
968
969 os_memset(info, 0, sizeof(*info));
970 msg = nlmsg_alloc();
971 if (!msg)
972 return -1;
973
974 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
975 0, NL80211_CMD_GET_WIPHY, 0);
976
977 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
978
979 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
980 return 0;
981 msg = NULL;
982 nla_put_failure:
983 nlmsg_free(msg);
984 return -1;
985 }
986
987
988 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
989 {
990 struct wiphy_info_data info;
991 if (wpa_driver_nl80211_get_info(drv, &info))
992 return;
993 drv->has_capability = 1;
994 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
995 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
996 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
997 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
998 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
999 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1000 WPA_DRIVER_CAPA_ENC_WEP104 |
1001 WPA_DRIVER_CAPA_ENC_TKIP |
1002 WPA_DRIVER_CAPA_ENC_CCMP;
1003
1004 drv->capa.max_scan_ssids = info.max_scan_ssids;
1005 if (info.ap_supported)
1006 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1007 }
1008
1009
1010 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1011 void *ctx)
1012 {
1013 int ret;
1014
1015 /* Initialize generic netlink and nl80211 */
1016
1017 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1018 if (drv->nl_cb == NULL) {
1019 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1020 "callbacks");
1021 goto err1;
1022 }
1023
1024 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1025 if (drv->nl_handle == NULL) {
1026 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1027 "callbacks");
1028 goto err2;
1029 }
1030
1031 if (genl_connect(drv->nl_handle)) {
1032 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1033 "netlink");
1034 goto err3;
1035 }
1036
1037 #ifdef CONFIG_LIBNL20
1038 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1039 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1040 "netlink cache");
1041 goto err3;
1042 }
1043 #else /* CONFIG_LIBNL20 */
1044 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1045 if (drv->nl_cache == NULL) {
1046 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1047 "netlink cache");
1048 goto err3;
1049 }
1050 #endif /* CONFIG_LIBNL20 */
1051
1052
1053 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1054 if (drv->nl80211 == NULL) {
1055 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1056 "found");
1057 goto err4;
1058 }
1059
1060 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1061 if (ret >= 0)
1062 ret = nl_socket_add_membership(drv->nl_handle, ret);
1063 if (ret < 0) {
1064 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1065 "membership for scan events: %d (%s)",
1066 ret, strerror(-ret));
1067 goto err4;
1068 }
1069
1070 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1071 if (ret >= 0)
1072 ret = nl_socket_add_membership(drv->nl_handle, ret);
1073 if (ret < 0) {
1074 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1075 "membership for mlme events: %d (%s)",
1076 ret, strerror(-ret));
1077 goto err4;
1078 }
1079
1080 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1081 wpa_driver_nl80211_event_receive, drv, ctx);
1082
1083 return 0;
1084
1085 err4:
1086 nl_cache_free(drv->nl_cache);
1087 err3:
1088 nl_handle_destroy(drv->nl_handle);
1089 err2:
1090 nl_cb_put(drv->nl_cb);
1091 err1:
1092 return -1;
1093 }
1094
1095
1096 /**
1097 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1098 * @ctx: context to be used when calling wpa_supplicant functions,
1099 * e.g., wpa_supplicant_event()
1100 * @ifname: interface name, e.g., wlan0
1101 * Returns: Pointer to private data, %NULL on failure
1102 */
1103 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1104 {
1105 int s;
1106 struct sockaddr_nl local;
1107 struct wpa_driver_nl80211_data *drv;
1108
1109 drv = os_zalloc(sizeof(*drv));
1110 if (drv == NULL)
1111 return NULL;
1112 drv->ctx = ctx;
1113 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1114 #ifdef CONFIG_AP
1115 drv->monitor_ifidx = -1;
1116 drv->monitor_sock = -1;
1117 #endif /* CONFIG_AP */
1118
1119 if (wpa_driver_nl80211_init_nl(drv, ctx))
1120 goto err1;
1121
1122 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1123
1124 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1125 if (drv->ioctl_sock < 0) {
1126 perror("socket(PF_INET,SOCK_DGRAM)");
1127 goto err5;
1128 }
1129
1130 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1131 if (s < 0) {
1132 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1133 goto err6;
1134 }
1135
1136 os_memset(&local, 0, sizeof(local));
1137 local.nl_family = AF_NETLINK;
1138 local.nl_groups = RTMGRP_LINK;
1139 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1140 perror("bind(netlink)");
1141 close(s);
1142 goto err6;
1143 }
1144
1145 #ifndef HOSTAPD
1146 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1147 ctx);
1148 #endif /* HOSTAPD */
1149 drv->link_event_sock = s;
1150
1151 if (wpa_driver_nl80211_finish_drv_init(drv))
1152 goto err7;
1153
1154 return drv;
1155
1156 err7:
1157 eloop_unregister_read_sock(drv->link_event_sock);
1158 close(drv->link_event_sock);
1159 err6:
1160 close(drv->ioctl_sock);
1161 err5:
1162 genl_family_put(drv->nl80211);
1163 nl_cache_free(drv->nl_cache);
1164 nl_handle_destroy(drv->nl_handle);
1165 nl_cb_put(drv->nl_cb);
1166 err1:
1167 os_free(drv);
1168 return NULL;
1169 }
1170
1171
1172 static int
1173 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1174 {
1175 drv->ifindex = if_nametoindex(drv->ifname);
1176
1177 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1178 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1179 "use managed mode");
1180 }
1181
1182 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1183 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1184 "UP", drv->ifname);
1185 return -1;
1186 }
1187
1188 wpa_driver_nl80211_capa(drv);
1189
1190 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1191
1192 return 0;
1193 }
1194
1195
1196 /**
1197 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1198 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1199 *
1200 * Shut down driver interface and processing of driver events. Free
1201 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1202 */
1203 static void wpa_driver_nl80211_deinit(void *priv)
1204 {
1205 struct wpa_driver_nl80211_data *drv = priv;
1206
1207 #ifdef CONFIG_AP
1208 if (drv->monitor_ifidx >= 0)
1209 nl80211_remove_iface(drv, drv->monitor_ifidx);
1210 if (drv->monitor_sock >= 0) {
1211 eloop_unregister_read_sock(drv->monitor_sock);
1212 close(drv->monitor_sock);
1213 }
1214 #endif /* CONFIG_AP */
1215
1216 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1217
1218 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1219
1220 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1221
1222 eloop_unregister_read_sock(drv->link_event_sock);
1223
1224 hostapd_set_iface_flags(drv, drv->ifname, 0);
1225 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1226
1227 close(drv->link_event_sock);
1228 close(drv->ioctl_sock);
1229
1230 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1231 genl_family_put(drv->nl80211);
1232 nl_cache_free(drv->nl_cache);
1233 nl_handle_destroy(drv->nl_handle);
1234 nl_cb_put(drv->nl_cb);
1235
1236 os_free(drv);
1237 }
1238
1239
1240 /**
1241 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1242 * @eloop_ctx: Driver private data
1243 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1244 *
1245 * This function can be used as registered timeout when starting a scan to
1246 * generate a scan completed event if the driver does not report this.
1247 */
1248 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1249 {
1250 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1251 if (drv->ap_scan_as_station) {
1252 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1253 drv->ap_scan_as_station = 0;
1254 }
1255 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1256 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1257 }
1258
1259
1260 /**
1261 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1262 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1263 * @params: Scan parameters
1264 * Returns: 0 on success, -1 on failure
1265 */
1266 static int wpa_driver_nl80211_scan(void *priv,
1267 struct wpa_driver_scan_params *params)
1268 {
1269 struct wpa_driver_nl80211_data *drv = priv;
1270 int ret = 0, timeout;
1271 struct nl_msg *msg, *ssids, *freqs;
1272 size_t i;
1273
1274 msg = nlmsg_alloc();
1275 ssids = nlmsg_alloc();
1276 freqs = nlmsg_alloc();
1277 if (!msg || !ssids || !freqs) {
1278 nlmsg_free(msg);
1279 nlmsg_free(ssids);
1280 nlmsg_free(freqs);
1281 return -1;
1282 }
1283
1284 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1285 NL80211_CMD_TRIGGER_SCAN, 0);
1286
1287 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1288
1289 for (i = 0; i < params->num_ssids; i++) {
1290 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1291 params->ssids[i].ssid);
1292 }
1293 if (params->num_ssids)
1294 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1295
1296 if (params->extra_ies) {
1297 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1298 params->extra_ies);
1299 }
1300
1301 if (params->freqs) {
1302 for (i = 0; params->freqs[i]; i++)
1303 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1304 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1305 }
1306
1307 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1308 msg = NULL;
1309 if (ret) {
1310 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1311 "(%s)", ret, strerror(-ret));
1312 #ifdef HOSTAPD
1313 if (drv->nlmode == NL80211_IFTYPE_AP) {
1314 /*
1315 * mac80211 does not allow scan requests in AP mode, so
1316 * try to do this in station mode.
1317 */
1318 if (wpa_driver_nl80211_set_mode(drv,
1319 IEEE80211_MODE_INFRA))
1320 goto nla_put_failure;
1321
1322 if (wpa_driver_nl80211_scan(drv, params)) {
1323 wpa_driver_nl80211_set_mode(drv,
1324 IEEE80211_MODE_AP);
1325 goto nla_put_failure;
1326 }
1327
1328 /* Restore AP mode when processing scan results */
1329 drv->ap_scan_as_station = 1;
1330 ret = 0;
1331 } else
1332 goto nla_put_failure;
1333 #else /* HOSTAPD */
1334 goto nla_put_failure;
1335 #endif /* HOSTAPD */
1336 }
1337
1338 /* Not all drivers generate "scan completed" wireless event, so try to
1339 * read results after a timeout. */
1340 timeout = 10;
1341 if (drv->scan_complete_events) {
1342 /*
1343 * The driver seems to deliver events to notify when scan is
1344 * complete, so use longer timeout to avoid race conditions
1345 * with scanning and following association request.
1346 */
1347 timeout = 30;
1348 }
1349 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1350 "seconds", ret, timeout);
1351 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1352 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1353 drv, drv->ctx);
1354
1355 nla_put_failure:
1356 nlmsg_free(ssids);
1357 nlmsg_free(msg);
1358 nlmsg_free(freqs);
1359 return ret;
1360 }
1361
1362
1363 static int bss_info_handler(struct nl_msg *msg, void *arg)
1364 {
1365 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1366 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1367 struct nlattr *bss[NL80211_BSS_MAX + 1];
1368 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1369 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1370 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1371 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1372 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1373 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1374 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1375 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1376 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1377 };
1378 struct wpa_scan_results *res = arg;
1379 struct wpa_scan_res **tmp;
1380 struct wpa_scan_res *r;
1381 const u8 *ie;
1382 size_t ie_len;
1383
1384 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1385 genlmsg_attrlen(gnlh, 0), NULL);
1386 if (!tb[NL80211_ATTR_BSS])
1387 return NL_SKIP;
1388 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1389 bss_policy))
1390 return NL_SKIP;
1391 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1392 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1393 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1394 } else {
1395 ie = NULL;
1396 ie_len = 0;
1397 }
1398
1399 r = os_zalloc(sizeof(*r) + ie_len);
1400 if (r == NULL)
1401 return NL_SKIP;
1402 if (bss[NL80211_BSS_BSSID])
1403 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1404 ETH_ALEN);
1405 if (bss[NL80211_BSS_FREQUENCY])
1406 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1407 if (bss[NL80211_BSS_BEACON_INTERVAL])
1408 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1409 if (bss[NL80211_BSS_CAPABILITY])
1410 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1411 r->flags |= WPA_SCAN_NOISE_INVALID;
1412 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1413 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1414 r->level /= 100; /* mBm to dBm */
1415 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1416 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1417 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1418 r->flags |= WPA_SCAN_LEVEL_INVALID;
1419 } else
1420 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1421 if (bss[NL80211_BSS_TSF])
1422 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1423 r->ie_len = ie_len;
1424 if (ie)
1425 os_memcpy(r + 1, ie, ie_len);
1426
1427 tmp = os_realloc(res->res,
1428 (res->num + 1) * sizeof(struct wpa_scan_res *));
1429 if (tmp == NULL) {
1430 os_free(r);
1431 return NL_SKIP;
1432 }
1433 tmp[res->num++] = r;
1434 res->res = tmp;
1435
1436 return NL_SKIP;
1437 }
1438
1439
1440 /**
1441 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1442 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1443 * Returns: Scan results on success, -1 on failure
1444 */
1445 static struct wpa_scan_results *
1446 wpa_driver_nl80211_get_scan_results(void *priv)
1447 {
1448 struct wpa_driver_nl80211_data *drv = priv;
1449 struct nl_msg *msg;
1450 struct wpa_scan_results *res;
1451 int ret;
1452
1453 res = os_zalloc(sizeof(*res));
1454 if (res == NULL)
1455 return 0;
1456 msg = nlmsg_alloc();
1457 if (!msg)
1458 goto nla_put_failure;
1459
1460 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1461 NL80211_CMD_GET_SCAN, 0);
1462 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1463
1464 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1465 msg = NULL;
1466 if (ret == 0) {
1467 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1468 (unsigned long) res->num);
1469 return res;
1470 }
1471 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1472 "(%s)", ret, strerror(-ret));
1473 nla_put_failure:
1474 nlmsg_free(msg);
1475 wpa_scan_results_free(res);
1476 return NULL;
1477 }
1478
1479
1480 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1481 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1482 const u8 *seq, size_t seq_len,
1483 const u8 *key, size_t key_len)
1484 {
1485 struct nl_msg *msg;
1486 int ret;
1487
1488 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1489 "set_tx=%d seq_len=%lu key_len=%lu",
1490 __func__, ifindex, alg, addr, key_idx, set_tx,
1491 (unsigned long) seq_len, (unsigned long) key_len);
1492
1493 msg = nlmsg_alloc();
1494 if (!msg)
1495 return -ENOMEM;
1496
1497 if (alg == WPA_ALG_NONE) {
1498 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1499 0, NL80211_CMD_DEL_KEY, 0);
1500 } else {
1501 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1502 0, NL80211_CMD_NEW_KEY, 0);
1503 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1504 switch (alg) {
1505 case WPA_ALG_WEP:
1506 if (key_len == 5)
1507 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1508 0x000FAC01);
1509 else
1510 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1511 0x000FAC05);
1512 break;
1513 case WPA_ALG_TKIP:
1514 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1515 break;
1516 case WPA_ALG_CCMP:
1517 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1518 break;
1519 case WPA_ALG_IGTK:
1520 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1521 break;
1522 default:
1523 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1524 "algorithm %d", __func__, alg);
1525 nlmsg_free(msg);
1526 return -1;
1527 }
1528 }
1529
1530 if (seq)
1531 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1532
1533 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1534 {
1535 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1536 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1537 }
1538 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1539 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1540
1541 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1542 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1543 ret = 0;
1544 if (ret)
1545 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1546 ret, strerror(-ret));
1547
1548 /*
1549 * If we failed or don't need to set the default TX key (below),
1550 * we're done here.
1551 */
1552 if (ret || !set_tx || alg == WPA_ALG_NONE)
1553 return ret;
1554 #ifdef HOSTAPD /* FIX: is this needed? */
1555 if (addr)
1556 return ret;
1557 #endif /* HOSTAPD */
1558
1559 msg = nlmsg_alloc();
1560 if (!msg)
1561 return -ENOMEM;
1562
1563 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1564 0, NL80211_CMD_SET_KEY, 0);
1565 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1566 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1567 if (alg == WPA_ALG_IGTK)
1568 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1569 else
1570 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1571
1572 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1573 if (ret == -ENOENT)
1574 ret = 0;
1575 if (ret)
1576 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1577 "err=%d %s)", ret, strerror(-ret));
1578 return ret;
1579
1580 nla_put_failure:
1581 return -ENOBUFS;
1582 }
1583
1584
1585 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1586 const u8 *addr, int key_idx,
1587 int set_tx, const u8 *seq,
1588 size_t seq_len,
1589 const u8 *key, size_t key_len)
1590 {
1591 struct wpa_driver_nl80211_data *drv = priv;
1592 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1593 seq_len, key, key_len);
1594 }
1595
1596
1597 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1598 const u8 *addr, int cmd, u16 reason_code)
1599 {
1600 int ret = -1;
1601 struct nl_msg *msg;
1602
1603 msg = nlmsg_alloc();
1604 if (!msg)
1605 return -1;
1606
1607 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1608
1609 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1610 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1611 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1612
1613 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1614 msg = NULL;
1615 if (ret) {
1616 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1617 "(%s)", ret, strerror(-ret));
1618 goto nla_put_failure;
1619 }
1620 ret = 0;
1621
1622 nla_put_failure:
1623 nlmsg_free(msg);
1624 return ret;
1625 }
1626
1627
1628 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1629 int reason_code)
1630 {
1631 struct wpa_driver_nl80211_data *drv = priv;
1632 wpa_printf(MSG_DEBUG, "%s", __func__);
1633 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1634 reason_code);
1635 }
1636
1637
1638 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1639 int reason_code)
1640 {
1641 struct wpa_driver_nl80211_data *drv = priv;
1642 wpa_printf(MSG_DEBUG, "%s", __func__);
1643 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1644 reason_code);
1645 }
1646
1647
1648 static int wpa_driver_nl80211_authenticate(
1649 void *priv, struct wpa_driver_auth_params *params)
1650 {
1651 struct wpa_driver_nl80211_data *drv = priv;
1652 int ret = -1, i;
1653 struct nl_msg *msg;
1654 enum nl80211_auth_type type;
1655
1656 drv->associated = 0;
1657
1658 msg = nlmsg_alloc();
1659 if (!msg)
1660 return -1;
1661
1662 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1663 drv->ifindex);
1664
1665 for (i = 0; i < 4; i++) {
1666 if (!params->wep_key[i])
1667 continue;
1668 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1669 i == params->wep_tx_keyidx, NULL, 0,
1670 params->wep_key[i],
1671 params->wep_key_len[i]);
1672 }
1673
1674 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1675 NL80211_CMD_AUTHENTICATE, 0);
1676
1677 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1678 if (params->bssid) {
1679 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1680 MAC2STR(params->bssid));
1681 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1682 }
1683 if (params->freq) {
1684 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1685 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1686 }
1687 if (params->ssid) {
1688 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1689 params->ssid, params->ssid_len);
1690 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1691 params->ssid);
1692 }
1693 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1694 if (params->ie)
1695 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1696 /*
1697 * TODO: if multiple auth_alg options enabled, try them one by one if
1698 * the AP rejects authentication due to unknown auth alg
1699 */
1700 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1701 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1702 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1703 type = NL80211_AUTHTYPE_SHARED_KEY;
1704 else if (params->auth_alg & AUTH_ALG_LEAP)
1705 type = NL80211_AUTHTYPE_NETWORK_EAP;
1706 else if (params->auth_alg & AUTH_ALG_FT)
1707 type = NL80211_AUTHTYPE_FT;
1708 else
1709 goto nla_put_failure;
1710 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1711 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1712
1713 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1714 msg = NULL;
1715 if (ret) {
1716 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1717 "(%s)", ret, strerror(-ret));
1718 goto nla_put_failure;
1719 }
1720 ret = 0;
1721 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1722 "successfully");
1723
1724 nla_put_failure:
1725 nlmsg_free(msg);
1726 return ret;
1727 }
1728
1729
1730 #if defined(CONFIG_AP) || defined(HOSTAPD)
1731
1732 struct phy_info_arg {
1733 u16 *num_modes;
1734 struct hostapd_hw_modes *modes;
1735 };
1736
1737 static int phy_info_handler(struct nl_msg *msg, void *arg)
1738 {
1739 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1740 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1741 struct phy_info_arg *phy_info = arg;
1742
1743 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1744
1745 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1746 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1747 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1748 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1749 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1750 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1751 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1752 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1753 };
1754
1755 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1756 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1757 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1758 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1759 };
1760
1761 struct nlattr *nl_band;
1762 struct nlattr *nl_freq;
1763 struct nlattr *nl_rate;
1764 int rem_band, rem_freq, rem_rate;
1765 struct hostapd_hw_modes *mode;
1766 int idx, mode_is_set;
1767
1768 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1769 genlmsg_attrlen(gnlh, 0), NULL);
1770
1771 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1772 return NL_SKIP;
1773
1774 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1775 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1776 if (!mode)
1777 return NL_SKIP;
1778 phy_info->modes = mode;
1779
1780 mode_is_set = 0;
1781
1782 mode = &phy_info->modes[*(phy_info->num_modes)];
1783 memset(mode, 0, sizeof(*mode));
1784 *(phy_info->num_modes) += 1;
1785
1786 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1787 nla_len(nl_band), NULL);
1788
1789 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1790 mode->ht_capab = nla_get_u16(
1791 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1792 }
1793
1794 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1795 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1796 nla_len(nl_freq), freq_policy);
1797 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1798 continue;
1799 mode->num_channels++;
1800 }
1801
1802 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1803 if (!mode->channels)
1804 return NL_SKIP;
1805
1806 idx = 0;
1807
1808 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1809 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1810 nla_len(nl_freq), freq_policy);
1811 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1812 continue;
1813
1814 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1815 mode->channels[idx].flag = 0;
1816
1817 if (!mode_is_set) {
1818 /* crude heuristic */
1819 if (mode->channels[idx].freq < 4000)
1820 mode->mode = HOSTAPD_MODE_IEEE80211B;
1821 else
1822 mode->mode = HOSTAPD_MODE_IEEE80211A;
1823 mode_is_set = 1;
1824 }
1825
1826 /* crude heuristic */
1827 if (mode->channels[idx].freq < 4000)
1828 if (mode->channels[idx].freq == 2484)
1829 mode->channels[idx].chan = 14;
1830 else
1831 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1832 else
1833 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1834
1835 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1836 mode->channels[idx].flag |=
1837 HOSTAPD_CHAN_DISABLED;
1838 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1839 mode->channels[idx].flag |=
1840 HOSTAPD_CHAN_PASSIVE_SCAN;
1841 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1842 mode->channels[idx].flag |=
1843 HOSTAPD_CHAN_NO_IBSS;
1844 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1845 mode->channels[idx].flag |=
1846 HOSTAPD_CHAN_RADAR;
1847
1848 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1849 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1850 mode->channels[idx].max_tx_power =
1851 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1852
1853 idx++;
1854 }
1855
1856 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1857 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1858 nla_len(nl_rate), rate_policy);
1859 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1860 continue;
1861 mode->num_rates++;
1862 }
1863
1864 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1865 if (!mode->rates)
1866 return NL_SKIP;
1867
1868 idx = 0;
1869
1870 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1871 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1872 nla_len(nl_rate), rate_policy);
1873 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1874 continue;
1875 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1876
1877 /* crude heuristic */
1878 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1879 mode->rates[idx].rate > 200)
1880 mode->mode = HOSTAPD_MODE_IEEE80211G;
1881
1882 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1883 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1884
1885 idx++;
1886 }
1887 }
1888
1889 return NL_SKIP;
1890 }
1891
1892 static struct hostapd_hw_modes *
1893 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1894 {
1895 u16 m;
1896 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1897 int i, mode11g_idx = -1;
1898
1899 /* If only 802.11g mode is included, use it to construct matching
1900 * 802.11b mode data. */
1901
1902 for (m = 0; m < *num_modes; m++) {
1903 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1904 return modes; /* 802.11b already included */
1905 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1906 mode11g_idx = m;
1907 }
1908
1909 if (mode11g_idx < 0)
1910 return modes; /* 2.4 GHz band not supported at all */
1911
1912 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1913 if (nmodes == NULL)
1914 return modes; /* Could not add 802.11b mode */
1915
1916 mode = &nmodes[*num_modes];
1917 os_memset(mode, 0, sizeof(*mode));
1918 (*num_modes)++;
1919 modes = nmodes;
1920
1921 mode->mode = HOSTAPD_MODE_IEEE80211B;
1922
1923 mode11g = &modes[mode11g_idx];
1924 mode->num_channels = mode11g->num_channels;
1925 mode->channels = os_malloc(mode11g->num_channels *
1926 sizeof(struct hostapd_channel_data));
1927 if (mode->channels == NULL) {
1928 (*num_modes)--;
1929 return modes; /* Could not add 802.11b mode */
1930 }
1931 os_memcpy(mode->channels, mode11g->channels,
1932 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1933
1934 mode->num_rates = 0;
1935 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1936 if (mode->rates == NULL) {
1937 os_free(mode->channels);
1938 (*num_modes)--;
1939 return modes; /* Could not add 802.11b mode */
1940 }
1941
1942 for (i = 0; i < mode11g->num_rates; i++) {
1943 if (mode11g->rates[i].rate > 110 ||
1944 mode11g->rates[i].flags &
1945 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1946 continue;
1947 mode->rates[mode->num_rates] = mode11g->rates[i];
1948 mode->num_rates++;
1949 if (mode->num_rates == 4)
1950 break;
1951 }
1952
1953 if (mode->num_rates == 0) {
1954 os_free(mode->channels);
1955 os_free(mode->rates);
1956 (*num_modes)--;
1957 return modes; /* No 802.11b rates */
1958 }
1959
1960 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1961 "information");
1962
1963 return modes;
1964 }
1965
1966
1967 static struct hostapd_hw_modes *
1968 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1969 {
1970 struct wpa_driver_nl80211_data *drv = priv;
1971 struct nl_msg *msg;
1972 struct phy_info_arg result = {
1973 .num_modes = num_modes,
1974 .modes = NULL,
1975 };
1976
1977 *num_modes = 0;
1978 *flags = 0;
1979
1980 msg = nlmsg_alloc();
1981 if (!msg)
1982 return NULL;
1983
1984 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1985 0, NL80211_CMD_GET_WIPHY, 0);
1986
1987 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1988
1989 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1990 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1991 nla_put_failure:
1992 return NULL;
1993 }
1994
1995
1996 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1997 const void *data, size_t len,
1998 int encrypt)
1999 {
2000 __u8 rtap_hdr[] = {
2001 0x00, 0x00, /* radiotap version */
2002 0x0e, 0x00, /* radiotap length */
2003 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2004 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2005 0x00, /* padding */
2006 0x00, 0x00, /* RX and TX flags to indicate that */
2007 0x00, 0x00, /* this is the injected frame directly */
2008 };
2009 struct iovec iov[2] = {
2010 {
2011 .iov_base = &rtap_hdr,
2012 .iov_len = sizeof(rtap_hdr),
2013 },
2014 {
2015 .iov_base = (void *) data,
2016 .iov_len = len,
2017 }
2018 };
2019 struct msghdr msg = {
2020 .msg_name = NULL,
2021 .msg_namelen = 0,
2022 .msg_iov = iov,
2023 .msg_iovlen = 2,
2024 .msg_control = NULL,
2025 .msg_controllen = 0,
2026 .msg_flags = 0,
2027 };
2028
2029 if (encrypt)
2030 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2031
2032 return sendmsg(drv->monitor_sock, &msg, 0);
2033 }
2034
2035
2036 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2037 size_t data_len)
2038 {
2039 struct wpa_driver_nl80211_data *drv = priv;
2040 struct ieee80211_mgmt *mgmt;
2041 int do_not_encrypt = 0;
2042 u16 fc;
2043
2044 mgmt = (struct ieee80211_mgmt *) data;
2045 fc = le_to_host16(mgmt->frame_control);
2046
2047 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2048 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2049 /*
2050 * Only one of the authentication frame types is encrypted.
2051 * In order for static WEP encryption to work properly (i.e.,
2052 * to not encrypt the frame), we need to tell mac80211 about
2053 * the frames that must not be encrypted.
2054 */
2055 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2056 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2057 if (auth_alg == WLAN_AUTH_OPEN ||
2058 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2059 do_not_encrypt = 1;
2060 }
2061
2062 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2063 !do_not_encrypt);
2064 }
2065
2066
2067 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2068 const u8 *head, size_t head_len,
2069 const u8 *tail, size_t tail_len,
2070 int dtim_period)
2071 {
2072 struct wpa_driver_nl80211_data *drv = priv;
2073 struct nl_msg *msg;
2074 u8 cmd = NL80211_CMD_NEW_BEACON;
2075 int ret;
2076 int beacon_set;
2077 #ifdef HOSTAPD
2078 struct i802_bss *bss;
2079
2080 bss = get_bss(drv, ifindex);
2081 if (bss == NULL)
2082 return -ENOENT;
2083 beacon_set = bss->beacon_set;
2084 #else /* HOSTAPD */
2085 beacon_set = drv->beacon_set;
2086 #endif /* HOSTAPD */
2087
2088 msg = nlmsg_alloc();
2089 if (!msg)
2090 return -ENOMEM;
2091
2092 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2093 beacon_set);
2094 if (beacon_set)
2095 cmd = NL80211_CMD_SET_BEACON;
2096
2097 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2098 0, cmd, 0);
2099 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2100 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2101 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2102 if (!drv->beacon_int)
2103 drv->beacon_int = 100;
2104 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2105 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2106
2107 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2108 if (ret) {
2109 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2110 ret, strerror(-ret));
2111 } else {
2112 #ifdef HOSTAPD
2113 bss->beacon_set = 1;
2114 #else /* HOSTAPD */
2115 drv->beacon_set = 1;
2116 #endif /* HOSTAPD */
2117 }
2118 return ret;
2119 nla_put_failure:
2120 return -ENOBUFS;
2121 }
2122
2123
2124 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2125 {
2126 struct wpa_driver_nl80211_data *drv = priv;
2127 struct nl_msg *msg;
2128
2129 drv->beacon_int = value;
2130
2131 #ifdef HOSTAPD
2132 if (!drv->bss.beacon_set)
2133 return 0;
2134 #else /* HOSTAPD */
2135 if (!drv->beacon_set)
2136 return 0;
2137 #endif /* HOSTAPD */
2138
2139 msg = nlmsg_alloc();
2140 if (!msg)
2141 return -ENOMEM;
2142
2143 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2144 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2145 0, NL80211_CMD_SET_BEACON, 0);
2146 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2147
2148 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2149
2150 return send_and_recv_msgs(drv, msg, NULL, NULL);
2151 nla_put_failure:
2152 return -ENOBUFS;
2153 }
2154
2155
2156 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2157 int freq, int ht_enabled,
2158 int sec_channel_offset)
2159 {
2160 struct nl_msg *msg;
2161 int ret;
2162
2163 msg = nlmsg_alloc();
2164 if (!msg)
2165 return -1;
2166
2167 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2168 NL80211_CMD_SET_WIPHY, 0);
2169
2170 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2171 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2172 if (ht_enabled) {
2173 switch (sec_channel_offset) {
2174 case -1:
2175 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2176 NL80211_CHAN_HT40MINUS);
2177 break;
2178 case 1:
2179 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2180 NL80211_CHAN_HT40PLUS);
2181 break;
2182 default:
2183 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2184 NL80211_CHAN_HT20);
2185 break;
2186 }
2187 }
2188
2189 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2190 if (ret == 0)
2191 return 0;
2192 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2193 "%d (%s)", freq, ret, strerror(-ret));
2194 nla_put_failure:
2195 return -1;
2196 }
2197
2198 #endif /* CONFIG_AP || HOSTAPD */
2199
2200
2201 #ifdef CONFIG_AP
2202
2203 static int wpa_driver_nl80211_set_beacon(void *priv,
2204 const u8 *head, size_t head_len,
2205 const u8 *tail, size_t tail_len,
2206 int dtim_period)
2207 {
2208 struct wpa_driver_nl80211_data *drv = priv;
2209 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2210 head, head_len,
2211 tail, tail_len,
2212 dtim_period);
2213 }
2214
2215 #endif /* CONFIG_AP */
2216
2217 #if defined(CONFIG_AP) || defined(HOSTAPD)
2218
2219 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2220 int ifidx)
2221 {
2222 struct nl_msg *msg;
2223
2224 #ifdef HOSTAPD
2225 /* stop listening for EAPOL on this interface */
2226 del_ifidx(drv, ifidx);
2227 #endif /* HOSTAPD */
2228
2229 msg = nlmsg_alloc();
2230 if (!msg)
2231 goto nla_put_failure;
2232
2233 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2234 0, NL80211_CMD_DEL_INTERFACE, 0);
2235 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2236
2237 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2238 return;
2239 nla_put_failure:
2240 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2241 ifidx);
2242 }
2243
2244
2245 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2246 const char *ifname, enum nl80211_iftype iftype,
2247 const u8 *addr)
2248 {
2249 struct nl_msg *msg, *flags = NULL;
2250 int ifidx;
2251 int ret = -ENOBUFS;
2252 #ifdef HOSTAPD
2253 struct ifreq ifreq;
2254 struct iwreq iwr;
2255 #endif /* HOSTAPD */
2256
2257 msg = nlmsg_alloc();
2258 if (!msg)
2259 return -1;
2260
2261 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2262 0, NL80211_CMD_NEW_INTERFACE, 0);
2263 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2264 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2265 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2266
2267 if (iftype == NL80211_IFTYPE_MONITOR) {
2268 int err;
2269
2270 flags = nlmsg_alloc();
2271 if (!flags)
2272 goto nla_put_failure;
2273
2274 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2275
2276 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2277
2278 nlmsg_free(flags);
2279
2280 if (err)
2281 goto nla_put_failure;
2282 }
2283
2284 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2285 if (ret) {
2286 nla_put_failure:
2287 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2288 ifname);
2289 return ret;
2290 }
2291
2292 ifidx = if_nametoindex(ifname);
2293
2294 if (ifidx <= 0)
2295 return -1;
2296
2297 #ifdef HOSTAPD
2298 /* start listening for EAPOL on this interface */
2299 add_ifidx(drv, ifidx);
2300
2301 if (addr) {
2302 switch (iftype) {
2303 case NL80211_IFTYPE_AP:
2304 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2305 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2306 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2307
2308 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2309 nl80211_remove_iface(drv, ifidx);
2310 return -1;
2311 }
2312 break;
2313 case NL80211_IFTYPE_WDS:
2314 memset(&iwr, 0, sizeof(iwr));
2315 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2316 iwr.u.addr.sa_family = ARPHRD_ETHER;
2317 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2318 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2319 return -1;
2320 break;
2321 default:
2322 /* nothing */
2323 break;
2324 }
2325 }
2326 #endif /* HOSTAPD */
2327
2328 return ifidx;
2329 }
2330
2331 #endif /* CONFIG_AP || HOSTAPD */
2332
2333 #ifdef CONFIG_AP
2334
2335 void ap_tx_status(void *ctx, const u8 *addr,
2336 const u8 *buf, size_t len, int ack);
2337 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2338 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2339 struct hostapd_frame_info *fi);
2340 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2341
2342 #endif /* CONFIG_AP */
2343
2344 #if defined(CONFIG_AP) || defined(HOSTAPD)
2345
2346 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2347 {
2348 struct ieee80211_hdr *hdr;
2349 u16 fc, type, stype;
2350
2351 hdr = (struct ieee80211_hdr *) buf;
2352 fc = le_to_host16(hdr->frame_control);
2353
2354 type = WLAN_FC_GET_TYPE(fc);
2355 stype = WLAN_FC_GET_STYPE(fc);
2356
2357 switch (type) {
2358 case WLAN_FC_TYPE_MGMT:
2359 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2360 ok ? "ACK" : "fail");
2361 #ifdef HOSTAPD
2362 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2363 #else /* HOSTAPD */
2364 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2365 #endif /* HOSTAPD */
2366 break;
2367 case WLAN_FC_TYPE_CTRL:
2368 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2369 ok ? "ACK" : "fail");
2370 break;
2371 case WLAN_FC_TYPE_DATA:
2372 #ifdef HOSTAPD
2373 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2374 #else /* HOSTAPD */
2375 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2376 #endif /* HOSTAPD */
2377 break;
2378 default:
2379 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2380 type);
2381 break;
2382 }
2383 }
2384
2385
2386 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2387 u8 *buf, size_t len,
2388 struct hostapd_frame_info *hfi,
2389 enum ieee80211_msg_type msg_type)
2390 {
2391 struct ieee80211_hdr *hdr;
2392 u16 fc, type, stype;
2393 size_t data_len = len;
2394 u8 *bssid;
2395 void *ctx = drv->ctx;
2396 #ifdef HOSTAPD
2397 struct hostapd_iface *iface = drv->hapd->iface;
2398 struct hostapd_data *hapd = NULL;
2399 int broadcast_bssid = 0;
2400 size_t i;
2401 #endif /* HOSTAPD */
2402
2403 /*
2404 * PS-Poll frames are 16 bytes. All other frames are
2405 * 24 bytes or longer.
2406 */
2407 if (len < 16)
2408 return;
2409
2410 hdr = (struct ieee80211_hdr *) buf;
2411 fc = le_to_host16(hdr->frame_control);
2412
2413 type = WLAN_FC_GET_TYPE(fc);
2414 stype = WLAN_FC_GET_STYPE(fc);
2415
2416 switch (type) {
2417 case WLAN_FC_TYPE_DATA:
2418 if (len < 24)
2419 return;
2420 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2421 case WLAN_FC_TODS:
2422 bssid = hdr->addr1;
2423 break;
2424 case WLAN_FC_FROMDS:
2425 bssid = hdr->addr2;
2426 break;
2427 default:
2428 /* discard */
2429 return;
2430 }
2431 break;
2432 case WLAN_FC_TYPE_CTRL:
2433 /* discard non-ps-poll frames */
2434 if (stype != WLAN_FC_STYPE_PSPOLL)
2435 return;
2436 bssid = hdr->addr1;
2437 break;
2438 case WLAN_FC_TYPE_MGMT:
2439 bssid = hdr->addr3;
2440 break;
2441 default:
2442 /* discard */
2443 return;
2444 }
2445
2446 #ifdef HOSTAPD
2447 /* find interface frame belongs to */
2448 for (i = 0; i < iface->num_bss; i++) {
2449 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
2450 hapd = iface->bss[i];
2451 break;
2452 }
2453 }
2454
2455 if (hapd == NULL) {
2456 hapd = iface->bss[0];
2457
2458 if (bssid[0] != 0xff || bssid[1] != 0xff ||
2459 bssid[2] != 0xff || bssid[3] != 0xff ||
2460 bssid[4] != 0xff || bssid[5] != 0xff) {
2461 /*
2462 * Unknown BSSID - drop frame if this is not from
2463 * passive scanning or a beacon (at least ProbeReq
2464 * frames to other APs may be allowed through RX
2465 * filtering in the wlan hw/driver)
2466 */
2467 if ((type != WLAN_FC_TYPE_MGMT ||
2468 stype != WLAN_FC_STYPE_BEACON))
2469 return;
2470 } else
2471 broadcast_bssid = 1;
2472 }
2473 ctx = hapd;
2474 #endif /* HOSTAPD */
2475
2476 switch (msg_type) {
2477 case ieee80211_msg_normal:
2478 /* continue processing */
2479 break;
2480 case ieee80211_msg_tx_callback_ack:
2481 handle_tx_callback(ctx, buf, data_len, 1);
2482 return;
2483 case ieee80211_msg_tx_callback_fail:
2484 handle_tx_callback(ctx, buf, data_len, 0);
2485 return;
2486 }
2487
2488 switch (type) {
2489 case WLAN_FC_TYPE_MGMT:
2490 if (stype != WLAN_FC_STYPE_BEACON &&
2491 stype != WLAN_FC_STYPE_PROBE_REQ)
2492 wpa_printf(MSG_MSGDUMP, "MGMT");
2493 #ifdef HOSTAPD
2494 if (broadcast_bssid) {
2495 for (i = 0; i < iface->num_bss; i++)
2496 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
2497 stype, hfi);
2498 } else
2499 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
2500 #else /* HOSTAPD */
2501 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2502 #endif /* HOSTAPD */
2503 break;
2504 case WLAN_FC_TYPE_CTRL:
2505 /* can only get here with PS-Poll frames */
2506 wpa_printf(MSG_DEBUG, "CTRL");
2507 #ifdef HOSTAPD
2508 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2509 #else /* HOSTAPD */
2510 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2511 #endif /* HOSTAPD */
2512 break;
2513 case WLAN_FC_TYPE_DATA:
2514 #ifdef HOSTAPD
2515 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2516 #else /* HOSTAPD */
2517 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2518 #endif /* HOSTAPD */
2519 break;
2520 }
2521 }
2522
2523
2524 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2525 {
2526 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2527 int len;
2528 unsigned char buf[3000];
2529 struct ieee80211_radiotap_iterator iter;
2530 int ret;
2531 struct hostapd_frame_info hfi;
2532 int injected = 0, failed = 0, msg_type, rxflags = 0;
2533
2534 len = recv(sock, buf, sizeof(buf), 0);
2535 if (len < 0) {
2536 perror("recv");
2537 return;
2538 }
2539
2540 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2541 printf("received invalid radiotap frame\n");
2542 return;
2543 }
2544
2545 memset(&hfi, 0, sizeof(hfi));
2546
2547 while (1) {
2548 ret = ieee80211_radiotap_iterator_next(&iter);
2549 if (ret == -ENOENT)
2550 break;
2551 if (ret) {
2552 printf("received invalid radiotap frame (%d)\n", ret);
2553 return;
2554 }
2555 switch (iter.this_arg_index) {
2556 case IEEE80211_RADIOTAP_FLAGS:
2557 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2558 len -= 4;
2559 break;
2560 case IEEE80211_RADIOTAP_RX_FLAGS:
2561 rxflags = 1;
2562 break;
2563 case IEEE80211_RADIOTAP_TX_FLAGS:
2564 injected = 1;
2565 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2566 IEEE80211_RADIOTAP_F_TX_FAIL;
2567 break;
2568 case IEEE80211_RADIOTAP_DATA_RETRIES:
2569 break;
2570 case IEEE80211_RADIOTAP_CHANNEL:
2571 /* TODO convert from freq/flags to channel number
2572 hfi.channel = XXX;
2573 hfi.phytype = XXX;
2574 */
2575 break;
2576 case IEEE80211_RADIOTAP_RATE:
2577 hfi.datarate = *iter.this_arg * 5;
2578 break;
2579 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2580 hfi.ssi_signal = *iter.this_arg;
2581 break;
2582 }
2583 }
2584
2585 if (rxflags && injected)
2586 return;
2587
2588 if (!injected)
2589 msg_type = ieee80211_msg_normal;
2590 else if (failed)
2591 msg_type = ieee80211_msg_tx_callback_fail;
2592 else
2593 msg_type = ieee80211_msg_tx_callback_ack;
2594
2595 handle_frame(drv, buf + iter.max_length,
2596 len - iter.max_length, &hfi, msg_type);
2597 }
2598
2599
2600 /*
2601 * we post-process the filter code later and rewrite
2602 * this to the offset to the last instruction
2603 */
2604 #define PASS 0xFF
2605 #define FAIL 0xFE
2606
2607 static struct sock_filter msock_filter_insns[] = {
2608 /*
2609 * do a little-endian load of the radiotap length field
2610 */
2611 /* load lower byte into A */
2612 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2613 /* put it into X (== index register) */
2614 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2615 /* load upper byte into A */
2616 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2617 /* left-shift it by 8 */
2618 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2619 /* or with X */
2620 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2621 /* put result into X */
2622 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2623
2624 /*
2625 * Allow management frames through, this also gives us those
2626 * management frames that we sent ourselves with status
2627 */
2628 /* load the lower byte of the IEEE 802.11 frame control field */
2629 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2630 /* mask off frame type and version */
2631 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2632 /* accept frame if it's both 0, fall through otherwise */
2633 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2634
2635 /*
2636 * TODO: add a bit to radiotap RX flags that indicates
2637 * that the sending station is not associated, then
2638 * add a filter here that filters on our DA and that flag
2639 * to allow us to deauth frames to that bad station.
2640 *
2641 * Not a regression -- we didn't do it before either.
2642 */
2643
2644 #if 0
2645 /*
2646 * drop non-data frames, WDS frames
2647 */
2648 /* load the lower byte of the frame control field */
2649 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2650 /* mask off QoS bit */
2651 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2652 /* drop non-data frames */
2653 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2654 /* load the upper byte of the frame control field */
2655 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2656 /* mask off toDS/fromDS */
2657 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2658 /* drop WDS frames */
2659 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2660 #endif
2661
2662 /*
2663 * add header length to index
2664 */
2665 /* load the lower byte of the frame control field */
2666 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2667 /* mask off QoS bit */
2668 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2669 /* right shift it by 6 to give 0 or 2 */
2670 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2671 /* add data frame header length */
2672 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2673 /* add index, was start of 802.11 header */
2674 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2675 /* move to index, now start of LL header */
2676 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2677
2678 /*
2679 * Accept empty data frames, we use those for
2680 * polling activity.
2681 */
2682 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2683 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2684
2685 /*
2686 * Accept EAPOL frames
2687 */
2688 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2689 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2690 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2691 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2692
2693 /* keep these last two statements or change the code below */
2694 /* return 0 == "DROP" */
2695 BPF_STMT(BPF_RET | BPF_K, 0),
2696 /* return ~0 == "keep all" */
2697 BPF_STMT(BPF_RET | BPF_K, ~0),
2698 };
2699
2700 static struct sock_fprog msock_filter = {
2701 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2702 .filter = msock_filter_insns,
2703 };
2704
2705
2706 static int add_monitor_filter(int s)
2707 {
2708 int idx;
2709
2710 /* rewrite all PASS/FAIL jump offsets */
2711 for (idx = 0; idx < msock_filter.len; idx++) {
2712 struct sock_filter *insn = &msock_filter_insns[idx];
2713
2714 if (BPF_CLASS(insn->code) == BPF_JMP) {
2715 if (insn->code == (BPF_JMP|BPF_JA)) {
2716 if (insn->k == PASS)
2717 insn->k = msock_filter.len - idx - 2;
2718 else if (insn->k == FAIL)
2719 insn->k = msock_filter.len - idx - 3;
2720 }
2721
2722 if (insn->jt == PASS)
2723 insn->jt = msock_filter.len - idx - 2;
2724 else if (insn->jt == FAIL)
2725 insn->jt = msock_filter.len - idx - 3;
2726
2727 if (insn->jf == PASS)
2728 insn->jf = msock_filter.len - idx - 2;
2729 else if (insn->jf == FAIL)
2730 insn->jf = msock_filter.len - idx - 3;
2731 }
2732 }
2733
2734 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2735 &msock_filter, sizeof(msock_filter))) {
2736 perror("SO_ATTACH_FILTER");
2737 return -1;
2738 }
2739
2740 return 0;
2741 }
2742
2743
2744 static int
2745 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2746 {
2747 char buf[IFNAMSIZ];
2748 struct sockaddr_ll ll;
2749 int optval;
2750 socklen_t optlen;
2751
2752 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2753 buf[IFNAMSIZ - 1] = '\0';
2754
2755 drv->monitor_ifidx =
2756 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2757
2758 if (drv->monitor_ifidx < 0)
2759 return -1;
2760
2761 if (hostapd_set_iface_flags(drv, buf, 1))
2762 goto error;
2763
2764 memset(&ll, 0, sizeof(ll));
2765 ll.sll_family = AF_PACKET;
2766 ll.sll_ifindex = drv->monitor_ifidx;
2767 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2768 if (drv->monitor_sock < 0) {
2769 perror("socket[PF_PACKET,SOCK_RAW]");
2770 goto error;
2771 }
2772
2773 if (add_monitor_filter(drv->monitor_sock)) {
2774 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2775 "interface; do filtering in user space");
2776 /* This works, but will cost in performance. */
2777 }
2778
2779 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2780 perror("monitor socket bind");
2781 goto error;
2782 }
2783
2784 optlen = sizeof(optval);
2785 optval = 20;
2786 if (setsockopt
2787 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2788 perror("Failed to set socket priority");
2789 goto error;
2790 }
2791
2792 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2793 drv, NULL)) {
2794 printf("Could not register monitor read socket\n");
2795 goto error;
2796 }
2797
2798 return 0;
2799 error:
2800 nl80211_remove_iface(drv, drv->monitor_ifidx);
2801 return -1;
2802 }
2803
2804 #endif /* CONFIG_AP || HOSTAPD */
2805
2806 #ifdef CONFIG_AP
2807
2808 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2809 struct wpa_driver_associate_params *params)
2810 {
2811 if (drv->monitor_ifidx < 0 &&
2812 nl80211_create_monitor_interface(drv))
2813 return -1;
2814
2815 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2816 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2817 nl80211_remove_iface(drv, drv->monitor_ifidx);
2818 drv->monitor_ifidx = -1;
2819 return -1;
2820 }
2821
2822 /* TODO: setup monitor interface (and add code somewhere to remove this
2823 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2824
2825 return 0;
2826 }
2827 #endif /* CONFIG_AP */
2828
2829
2830 static int wpa_driver_nl80211_associate(
2831 void *priv, struct wpa_driver_associate_params *params)
2832 {
2833 struct wpa_driver_nl80211_data *drv = priv;
2834 int ret = -1;
2835 struct nl_msg *msg;
2836
2837 #ifdef CONFIG_AP
2838 if (params->mode == 2)
2839 return wpa_driver_nl80211_ap(drv, params);
2840 #endif /* CONFIG_AP */
2841
2842 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2843 params->drop_unencrypted);
2844
2845 drv->associated = 0;
2846
2847 msg = nlmsg_alloc();
2848 if (!msg)
2849 return -1;
2850
2851 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2852 drv->ifindex);
2853 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2854 NL80211_CMD_ASSOCIATE, 0);
2855
2856 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2857 if (params->bssid) {
2858 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2859 MAC2STR(params->bssid));
2860 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2861 }
2862 if (params->freq) {
2863 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2864 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2865 }
2866 if (params->ssid) {
2867 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2868 params->ssid, params->ssid_len);
2869 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2870 params->ssid);
2871 if (params->ssid_len > sizeof(drv->ssid))
2872 goto nla_put_failure;
2873 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2874 drv->ssid_len = params->ssid_len;
2875 }
2876 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2877 if (params->wpa_ie)
2878 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2879 params->wpa_ie);
2880
2881 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2882 msg = NULL;
2883 if (ret) {
2884 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2885 "(%s)", ret, strerror(-ret));
2886 goto nla_put_failure;
2887 }
2888 ret = 0;
2889 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2890 "successfully");
2891
2892 nla_put_failure:
2893 nlmsg_free(msg);
2894 return ret;
2895 }
2896
2897
2898 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2899 int ifindex, int mode)
2900 {
2901 struct nl_msg *msg;
2902 int ret = -ENOBUFS;
2903
2904 msg = nlmsg_alloc();
2905 if (!msg)
2906 return -ENOMEM;
2907
2908 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2909 0, NL80211_CMD_SET_INTERFACE, 0);
2910 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2911 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2912
2913 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2914 if (!ret)
2915 return 0;
2916 nla_put_failure:
2917 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
2918 " %d (%s)", ifindex, mode, ret, strerror(-ret));
2919 return ret;
2920 }
2921
2922
2923 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2924 {
2925 struct wpa_driver_nl80211_data *drv = priv;
2926 int ret = -1;
2927 int nlmode;
2928
2929 switch (mode) {
2930 case 0:
2931 nlmode = NL80211_IFTYPE_STATION;
2932 break;
2933 case 1:
2934 nlmode = NL80211_IFTYPE_ADHOC;
2935 break;
2936 case 2:
2937 nlmode = NL80211_IFTYPE_AP;
2938 break;
2939 default:
2940 return -1;
2941 }
2942
2943 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
2944 drv->nlmode = nlmode;
2945 return 0;
2946 }
2947
2948 if (nlmode == drv->nlmode)
2949 return 0; /* Already in the requested mode */
2950
2951 /* mac80211 doesn't allow mode changes while the device is up, so
2952 * take the device down, try to set the mode again, and bring the
2953 * device back up.
2954 */
2955 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2956 /* Try to set the mode again while the interface is down */
2957 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
2958 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2959 ret = -1;
2960 }
2961
2962 if (!ret)
2963 drv->nlmode = nlmode;
2964
2965 return ret;
2966 }
2967
2968
2969 static int wpa_driver_nl80211_get_capa(void *priv,
2970 struct wpa_driver_capa *capa)
2971 {
2972 struct wpa_driver_nl80211_data *drv = priv;
2973 if (!drv->has_capability)
2974 return -1;
2975 os_memcpy(capa, &drv->capa, sizeof(*capa));
2976 return 0;
2977 }
2978
2979
2980 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2981 {
2982 struct wpa_driver_nl80211_data *drv = priv;
2983
2984 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2985 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2986 drv->operstate = state;
2987 return wpa_driver_nl80211_send_oper_ifla(
2988 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2989 }
2990
2991
2992 #ifdef HOSTAPD
2993
2994 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2995
2996 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2997 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2998
2999
3000 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3001 int ifindex)
3002 {
3003 struct i802_bss *bss = &drv->bss;
3004 while (bss) {
3005 if (ifindex == bss->ifindex)
3006 return bss;
3007 bss = bss->next;
3008 }
3009 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3010 return NULL;
3011 }
3012
3013
3014 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3015 {
3016 int i;
3017 int *old;
3018
3019 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3020 ifidx);
3021 for (i = 0; i < drv->num_if_indices; i++) {
3022 if (drv->if_indices[i] == 0) {
3023 drv->if_indices[i] = ifidx;
3024 return;
3025 }
3026 }
3027
3028 if (drv->if_indices != drv->default_if_indices)
3029 old = drv->if_indices;
3030 else
3031 old = NULL;
3032
3033 drv->if_indices = realloc(old,
3034 sizeof(int) * (drv->num_if_indices + 1));
3035 if (!drv->if_indices) {
3036 if (!old)
3037 drv->if_indices = drv->default_if_indices;
3038 else
3039 drv->if_indices = old;
3040 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3041 "interfaces");
3042 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3043 return;
3044 }
3045 drv->if_indices[drv->num_if_indices] = ifidx;
3046 drv->num_if_indices++;
3047 }
3048
3049
3050 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3051 {
3052 int i;
3053
3054 for (i = 0; i < drv->num_if_indices; i++) {
3055 if (drv->if_indices[i] == ifidx) {
3056 drv->if_indices[i] = 0;
3057 break;
3058 }
3059 }
3060 }
3061
3062
3063 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3064 {
3065 int i;
3066
3067 for (i = 0; i < drv->num_if_indices; i++)
3068 if (drv->if_indices[i] == ifidx)
3069 return 1;
3070
3071 return 0;
3072 }
3073
3074
3075 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3076 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3077 size_t seq_len, const u8 *key, size_t key_len)
3078 {
3079 struct wpa_driver_nl80211_data *drv = priv;
3080 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3081 set_tx, seq, seq_len, key, key_len);
3082 }
3083
3084
3085 static inline int min_int(int a, int b)
3086 {
3087 if (a < b)
3088 return a;
3089 return b;
3090 }
3091
3092
3093 static int get_key_handler(struct nl_msg *msg, void *arg)
3094 {
3095 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3096 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3097
3098 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3099 genlmsg_attrlen(gnlh, 0), NULL);
3100
3101 /*
3102 * TODO: validate the key index and mac address!
3103 * Otherwise, there's a race condition as soon as
3104 * the kernel starts sending key notifications.
3105 */
3106
3107 if (tb[NL80211_ATTR_KEY_SEQ])
3108 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3109 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3110 return NL_SKIP;
3111 }
3112
3113
3114 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3115 int idx, u8 *seq)
3116 {
3117 struct wpa_driver_nl80211_data *drv = priv;
3118 struct nl_msg *msg;
3119
3120 msg = nlmsg_alloc();
3121 if (!msg)
3122 return -ENOMEM;
3123
3124 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3125 0, NL80211_CMD_GET_KEY, 0);
3126
3127 if (addr)
3128 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3129 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3130 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3131
3132 memset(seq, 0, 6);
3133
3134 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3135 nla_put_failure:
3136 return -ENOBUFS;
3137 }
3138
3139
3140 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3141 int mode)
3142 {
3143 struct wpa_driver_nl80211_data *drv = priv;
3144 struct nl_msg *msg;
3145 u8 rates[NL80211_MAX_SUPP_RATES];
3146 u8 rates_len = 0;
3147 int i;
3148
3149 msg = nlmsg_alloc();
3150 if (!msg)
3151 return -ENOMEM;
3152
3153 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3154 NL80211_CMD_SET_BSS, 0);
3155
3156 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3157 rates[rates_len++] = basic_rates[i] / 5;
3158
3159 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3160
3161 /* TODO: multi-BSS support */
3162 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3163
3164 return send_and_recv_msgs(drv, msg, NULL, NULL);
3165 nla_put_failure:
3166 return -ENOBUFS;
3167 }
3168
3169
3170 /* Set kernel driver on given frequency (MHz) */
3171 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3172 {
3173 struct wpa_driver_nl80211_data *drv = priv;
3174 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3175 freq->sec_channel_offset);
3176 }
3177
3178
3179 static int i802_set_rts(void *priv, int rts)
3180 {
3181 struct wpa_driver_nl80211_data *drv = priv;
3182 struct iwreq iwr;
3183
3184 memset(&iwr, 0, sizeof(iwr));
3185 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3186 iwr.u.rts.value = rts;
3187 iwr.u.rts.fixed = 1;
3188
3189 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3190 perror("ioctl[SIOCSIWRTS]");
3191 return -1;
3192 }
3193
3194 return 0;
3195 }
3196
3197
3198 static int i802_set_frag(void *priv, int frag)
3199 {
3200 struct wpa_driver_nl80211_data *drv = priv;
3201 struct iwreq iwr;
3202
3203 memset(&iwr, 0, sizeof(iwr));
3204 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3205 iwr.u.frag.value = frag;
3206 iwr.u.frag.fixed = 1;
3207
3208 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3209 perror("ioctl[SIOCSIWFRAG]");
3210 return -1;
3211 }
3212
3213 return 0;
3214 }
3215
3216
3217 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3218 {
3219 struct wpa_driver_nl80211_data *drv = priv;
3220 struct iwreq iwr;
3221
3222 memset(&iwr, 0, sizeof(iwr));
3223 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3224
3225 iwr.u.retry.value = short_retry;
3226 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3227 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3228 perror("ioctl[SIOCSIWRETRY(short)]");
3229 return -1;
3230 }
3231
3232 iwr.u.retry.value = long_retry;
3233 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3234 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3235 perror("ioctl[SIOCSIWRETRY(long)]");
3236 return -1;
3237 }
3238
3239 return 0;
3240 }
3241
3242
3243 static int i802_flush(void *priv)
3244 {
3245 struct wpa_driver_nl80211_data *drv = priv;
3246 struct nl_msg *msg;
3247
3248 msg = nlmsg_alloc();
3249 if (!msg)
3250 return -1;
3251
3252 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3253 0, NL80211_CMD_DEL_STATION, 0);
3254
3255 /*
3256 * XXX: FIX! this needs to flush all VLANs too
3257 */
3258 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3259 if_nametoindex(drv->ifname));
3260
3261 return send_and_recv_msgs(drv, msg, NULL, NULL);
3262 nla_put_failure:
3263 return -ENOBUFS;
3264 }
3265
3266
3267 static int get_sta_handler(struct nl_msg *msg, void *arg)
3268 {
3269 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3270 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3271 struct hostap_sta_driver_data *data = arg;
3272 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3273 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3274 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3275 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3276 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3277 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3278 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3279 };
3280
3281 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3282 genlmsg_attrlen(gnlh, 0), NULL);
3283
3284 /*
3285 * TODO: validate the interface and mac address!
3286 * Otherwise, there's a race condition as soon as
3287 * the kernel starts sending station notifications.
3288 */
3289
3290 if (!tb[NL80211_ATTR_STA_INFO]) {
3291 wpa_printf(MSG_DEBUG, "sta stats missing!");
3292 return NL_SKIP;
3293 }
3294 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3295 tb[NL80211_ATTR_STA_INFO],
3296 stats_policy)) {
3297 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3298 return NL_SKIP;
3299 }
3300
3301 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3302 data->inactive_msec =
3303 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3304 if (stats[NL80211_STA_INFO_RX_BYTES])
3305 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3306 if (stats[NL80211_STA_INFO_TX_BYTES])
3307 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3308 if (stats[NL80211_STA_INFO_RX_PACKETS])
3309 data->rx_packets =
3310 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3311 if (stats[NL80211_STA_INFO_TX_PACKETS])
3312 data->tx_packets =
3313 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3314
3315 return NL_SKIP;
3316 }
3317
3318 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3319 const u8 *addr)
3320 {
3321 struct wpa_driver_nl80211_data *drv = priv;
3322 struct nl_msg *msg;
3323
3324 os_memset(data, 0, sizeof(*data));
3325 msg = nlmsg_alloc();
3326 if (!msg)
3327 return -ENOMEM;
3328
3329 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3330 0, NL80211_CMD_GET_STATION, 0);
3331
3332 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3333 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3334
3335 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3336 nla_put_failure:
3337 return -ENOBUFS;
3338 }
3339
3340
3341 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3342 size_t data_len, int encrypt, const u8 *own_addr)
3343 {
3344 struct wpa_driver_nl80211_data *drv = priv;
3345 struct ieee80211_hdr *hdr;
3346 size_t len;
3347 u8 *pos;
3348 int res;
3349 #if 0 /* FIX */
3350 int qos = sta->flags & WLAN_STA_WME;
3351 #else
3352 int qos = 0;
3353 #endif
3354
3355 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3356 data_len;
3357 hdr = os_zalloc(len);
3358 if (hdr == NULL) {
3359 printf("malloc() failed for i802_send_data(len=%lu)\n",
3360 (unsigned long) len);
3361 return -1;
3362 }
3363
3364 hdr->frame_control =
3365 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3366 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3367 if (encrypt)
3368 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3369 #if 0 /* To be enabled if qos determination is added above */
3370 if (qos) {
3371 hdr->frame_control |=
3372 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3373 }
3374 #endif
3375
3376 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3377 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3378 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3379 pos = (u8 *) (hdr + 1);
3380
3381 #if 0 /* To be enabled if qos determination is added above */
3382 if (qos) {
3383 /* add an empty QoS header if needed */
3384 pos[0] = 0;
3385 pos[1] = 0;
3386 pos += 2;
3387 }
3388 #endif
3389
3390 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3391 pos += sizeof(rfc1042_header);
3392 WPA_PUT_BE16(pos, ETH_P_PAE);
3393 pos += 2;
3394 memcpy(pos, data, data_len);
3395
3396 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3397 if (res < 0) {
3398 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3399 "failed: %d (%s)",
3400 (unsigned long) len, errno, strerror(errno));
3401 }
3402 free(hdr);
3403
3404 return res;
3405 }
3406
3407
3408 static int i802_sta_add(const char *ifname, void *priv,
3409 struct hostapd_sta_add_params *params)
3410 {
3411 struct wpa_driver_nl80211_data *drv = priv;
3412 struct nl_msg *msg;
3413 int ret = -ENOBUFS;
3414
3415 msg = nlmsg_alloc();
3416 if (!msg)
3417 return -ENOMEM;
3418
3419 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3420 0, NL80211_CMD_NEW_STATION, 0);
3421
3422 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3423 if_nametoindex(drv->ifname));
3424 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3425 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3426 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3427 params->supp_rates);
3428 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3429 params->listen_interval);
3430
3431 #ifdef CONFIG_IEEE80211N
3432 if (params->ht_capabilities) {
3433 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3434 params->ht_capabilities->length,
3435 &params->ht_capabilities->data);
3436 }
3437 #endif /* CONFIG_IEEE80211N */
3438
3439 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3440 if (ret)
3441 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3442 "result: %d (%s)", ret, strerror(-ret));
3443 if (ret == -EEXIST)
3444 ret = 0;
3445 nla_put_failure:
3446 return ret;
3447 }
3448
3449
3450 static int i802_sta_remove(void *priv, const u8 *addr)
3451 {
3452 struct wpa_driver_nl80211_data *drv = priv;
3453 struct nl_msg *msg;
3454 int ret;
3455
3456 msg = nlmsg_alloc();
3457 if (!msg)
3458 return -ENOMEM;
3459
3460 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3461 0, NL80211_CMD_DEL_STATION, 0);
3462
3463 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3464 if_nametoindex(drv->ifname));
3465 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3466
3467 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3468 if (ret == -ENOENT)
3469 return 0;
3470 return ret;
3471 nla_put_failure:
3472 return -ENOBUFS;
3473 }
3474
3475
3476 static int i802_sta_set_flags(void *priv, const u8 *addr,
3477 int total_flags, int flags_or, int flags_and)
3478 {
3479 struct wpa_driver_nl80211_data *drv = priv;
3480 struct nl_msg *msg, *flags = NULL;
3481
3482 msg = nlmsg_alloc();
3483 if (!msg)
3484 return -ENOMEM;
3485
3486 flags = nlmsg_alloc();
3487 if (!flags) {
3488 nlmsg_free(msg);
3489 return -ENOMEM;
3490 }
3491
3492 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3493 0, NL80211_CMD_SET_STATION, 0);
3494
3495 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3496 if_nametoindex(drv->ifname));
3497 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3498
3499 if (total_flags & WLAN_STA_AUTHORIZED)
3500 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3501
3502 if (total_flags & WLAN_STA_WMM)
3503 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3504
3505 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3506 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3507
3508 if (total_flags & WLAN_STA_MFP)
3509 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3510
3511 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3512 goto nla_put_failure;
3513
3514 nlmsg_free(flags);
3515
3516 return send_and_recv_msgs(drv, msg, NULL, NULL);
3517 nla_put_failure:
3518 nlmsg_free(flags);
3519 return -ENOBUFS;
3520 }
3521
3522
3523 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3524 int cw_min, int cw_max, int burst_time)
3525 {
3526 struct wpa_driver_nl80211_data *drv = priv;
3527 struct nl_msg *msg;
3528 struct nlattr *txq, *params;
3529
3530 msg = nlmsg_alloc();
3531 if (!msg)
3532 return -1;
3533
3534 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3535 0, NL80211_CMD_SET_WIPHY, 0);
3536
3537 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3538
3539 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3540 if (!txq)
3541 goto nla_put_failure;
3542
3543 /* We are only sending parameters for a single TXQ at a time */
3544 params = nla_nest_start(msg, 1);
3545 if (!params)
3546 goto nla_put_failure;
3547
3548 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3549 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3550 * 32 usec, so need to convert the value here. */
3551 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3552 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3553 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3554 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3555
3556 nla_nest_end(msg, params);
3557
3558 nla_nest_end(msg, txq);
3559
3560 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3561 return 0;
3562 nla_put_failure:
3563 return -1;
3564 }
3565
3566
3567 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3568 {
3569 struct wpa_driver_nl80211_data *drv = priv;
3570 int ifidx;
3571 struct i802_bss *bss;
3572
3573 bss = os_zalloc(sizeof(*bss));
3574 if (bss == NULL)
3575 return -1;
3576 bss->ifindex = if_nametoindex(ifname);
3577
3578 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3579 if (ifidx < 0) {
3580 os_free(bss);
3581 return -1;
3582 }
3583 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3584 nl80211_remove_iface(priv, ifidx);
3585 os_free(bss);
3586 return -1;
3587 }
3588 bss->next = drv->bss.next;
3589 drv->bss.next = bss;
3590 return 0;
3591 }
3592
3593
3594 static int i802_bss_remove(void *priv, const char *ifname)
3595 {
3596 struct wpa_driver_nl80211_data *drv = priv;
3597 struct i802_bss *bss, *prev;
3598 int ifindex = if_nametoindex(ifname);
3599 nl80211_remove_iface(priv, ifindex);
3600 prev = &drv->bss;
3601 bss = drv->bss.next;
3602 while (bss) {
3603 if (ifindex == bss->ifindex) {
3604 prev->next = bss->next;
3605 os_free(bss);
3606 break;
3607 }
3608 prev = bss;
3609 bss = bss->next;
3610 }
3611 return 0;
3612 }
3613
3614
3615 static int i802_set_beacon(const char *iface, void *priv,
3616 const u8 *head, size_t head_len,
3617 const u8 *tail, size_t tail_len, int dtim_period)
3618 {
3619 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3620 head, head_len,
3621 tail, tail_len,
3622 dtim_period);
3623 }
3624
3625
3626 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3627 {
3628 struct nl_msg *msg;
3629
3630 msg = nlmsg_alloc();
3631 if (!msg)
3632 return -ENOMEM;
3633
3634 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3635 0, NL80211_CMD_DEL_BEACON, 0);
3636 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3637
3638 return send_and_recv_msgs(drv, msg, NULL, NULL);
3639 nla_put_failure:
3640 return -ENOBUFS;
3641 }
3642
3643
3644 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3645 {
3646 struct wpa_driver_nl80211_data *drv = priv;
3647 struct nl_msg *msg;
3648
3649 msg = nlmsg_alloc();
3650 if (!msg)
3651 return -ENOMEM;
3652
3653 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3654 NL80211_CMD_SET_BSS, 0);
3655
3656 if (cts >= 0)
3657 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3658 if (preamble >= 0)
3659 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3660 if (slot >= 0)
3661 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3662
3663 /* TODO: multi-BSS support */
3664 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3665
3666 return send_and_recv_msgs(drv, msg, NULL, NULL);
3667 nla_put_failure:
3668 return -ENOBUFS;
3669 }
3670
3671
3672 static int i802_set_cts_protect(void *priv, int value)
3673 {
3674 return i802_set_bss(priv, value, -1, -1);
3675 }
3676
3677
3678 static int i802_set_preamble(void *priv, int value)
3679 {
3680 return i802_set_bss(priv, -1, value, -1);
3681 }
3682
3683
3684 static int i802_set_short_slot_time(void *priv, int value)
3685 {
3686 return i802_set_bss(priv, -1, -1, value);
3687 }
3688
3689
3690 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3691 {
3692 switch (type) {
3693 case HOSTAPD_IF_VLAN:
3694 return NL80211_IFTYPE_AP_VLAN;
3695 case HOSTAPD_IF_WDS:
3696 return NL80211_IFTYPE_WDS;
3697 }
3698 return -1;
3699 }
3700
3701
3702 static int i802_if_add(const char *iface, void *priv,
3703 enum hostapd_driver_if_type type, char *ifname,
3704 const u8 *addr)
3705 {
3706 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3707 return -1;
3708 return 0;
3709 }
3710
3711
3712 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3713 char *ifname, const u8 *addr)
3714 {
3715 /* unused at the moment */
3716 return -1;
3717 }
3718
3719
3720 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3721 const char *ifname, const u8 *addr)
3722 {
3723 nl80211_remove_iface(priv, if_nametoindex(ifname));
3724 return 0;
3725 }
3726
3727
3728 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3729 const char *ifname, int vlan_id)
3730 {
3731 struct wpa_driver_nl80211_data *drv = priv;
3732 struct nl_msg *msg;
3733
3734 msg = nlmsg_alloc();
3735 if (!msg)
3736 return -ENOMEM;
3737
3738 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3739 0, NL80211_CMD_SET_STATION, 0);
3740
3741 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3742 if_nametoindex(drv->ifname));
3743 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3744 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3745 if_nametoindex(ifname));
3746
3747 return send_and_recv_msgs(drv, msg, NULL, NULL);
3748 nla_put_failure:
3749 return -ENOBUFS;
3750 }
3751
3752
3753 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3754 {
3755 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3756 struct sockaddr_ll lladdr;
3757 unsigned char buf[3000];
3758 int len;
3759 socklen_t fromlen = sizeof(lladdr);
3760
3761 len = recvfrom(sock, buf, sizeof(buf), 0,
3762 (struct sockaddr *)&lladdr, &fromlen);
3763 if (len < 0) {
3764 perror("recv");
3765 return;
3766 }
3767
3768 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3769 struct hostapd_data *hapd;
3770 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3771 if (!hapd)
3772 return;
3773 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3774 }
3775 }
3776
3777
3778 static int i802_get_inact_sec(void *priv, const u8 *addr)
3779 {
3780 struct hostap_sta_driver_data data;
3781 int ret;
3782
3783 data.inactive_msec = (unsigned long) -1;
3784 ret = i802_read_sta_data(priv, &data, addr);
3785 if (ret || data.inactive_msec == (unsigned long) -1)
3786 return -1;
3787 return data.inactive_msec / 1000;
3788 }
3789
3790
3791 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3792 {
3793 #if 0
3794 /* TODO */
3795 #endif
3796 return 0;
3797 }
3798
3799
3800 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
3801 {
3802 struct wpa_driver_nl80211_data *drv = priv;
3803 struct ieee80211_mgmt mgmt;
3804
3805 memset(&mgmt, 0, sizeof(mgmt));
3806 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3807 WLAN_FC_STYPE_DEAUTH);
3808 memcpy(mgmt.da, addr, ETH_ALEN);
3809 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3810 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3811 mgmt.u.deauth.reason_code = host_to_le16(reason);
3812 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3813 IEEE80211_HDRLEN +
3814 sizeof(mgmt.u.deauth));
3815 }
3816
3817
3818 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
3819 {
3820 struct wpa_driver_nl80211_data *drv = priv;
3821 struct ieee80211_mgmt mgmt;
3822
3823 memset(&mgmt, 0, sizeof(mgmt));
3824 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3825 WLAN_FC_STYPE_DISASSOC);
3826 memcpy(mgmt.da, addr, ETH_ALEN);
3827 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3828 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3829 mgmt.u.disassoc.reason_code = host_to_le16(reason);
3830 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3831 IEEE80211_HDRLEN +
3832 sizeof(mgmt.u.disassoc));
3833 }
3834
3835
3836 static void *i802_init(struct hostapd_data *hapd,
3837 struct wpa_init_params *params)
3838 {
3839 struct wpa_driver_nl80211_data *drv;
3840 size_t i;
3841 struct ifreq ifr;
3842
3843 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
3844 if (drv == NULL) {
3845 printf("Could not allocate memory for i802 driver data\n");
3846 return NULL;
3847 }
3848
3849 drv->hapd = hapd;
3850 drv->ctx = hapd;
3851 memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
3852 drv->ifindex = if_nametoindex(drv->ifname);
3853 drv->bss.ifindex = drv->ifindex;
3854
3855 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3856 drv->if_indices = drv->default_if_indices;
3857 for (i = 0; i < params->num_bridge; i++) {
3858 if (params->bridge[i])
3859 add_ifidx(drv, if_nametoindex(params->bridge[i]));
3860 }
3861
3862 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
3863 if (drv->ioctl_sock < 0) {
3864 perror("socket[PF_INET,SOCK_DGRAM]");
3865 goto failed;
3866 }
3867
3868 /* start listening for EAPOL on the default AP interface */
3869 add_ifidx(drv, drv->ifindex);
3870
3871 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3872 goto failed;
3873
3874 if (params->bssid) {
3875 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
3876 os_memcpy(ifr.ifr_hwaddr.sa_data, params->bssid, ETH_ALEN);
3877 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
3878
3879 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
3880 perror("ioctl(SIOCSIFHWADDR)");
3881 goto failed;
3882 }
3883 }
3884
3885 if (wpa_driver_nl80211_init_nl(drv, drv->hapd))
3886 goto failed;
3887
3888 /* Initialise a monitor interface */
3889 if (nl80211_create_monitor_interface(drv))
3890 goto failed;
3891
3892 if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3893 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3894 "into AP mode", drv->ifname);
3895 goto fail1;
3896 }
3897
3898 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3899 goto fail1;
3900
3901 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3902 if (drv->eapol_sock < 0) {
3903 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3904 goto fail1;
3905 }
3906
3907 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3908 {
3909 printf("Could not register read socket for eapol\n");
3910 goto failed;
3911 }
3912
3913 os_memset(&ifr, 0, sizeof(ifr));
3914 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
3915 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
3916 perror("ioctl(SIOCGIFHWADDR)");
3917 goto fail1;
3918 }
3919
3920 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
3921 printf("Invalid HW-addr family 0x%04x\n",
3922 ifr.ifr_hwaddr.sa_family);
3923 goto fail1;
3924 }
3925 os_memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
3926
3927 return drv;
3928
3929 fail1:
3930 nl80211_remove_iface(drv, drv->monitor_ifidx);
3931 failed:
3932 free(drv);
3933 return NULL;
3934 }
3935
3936
3937 static void i802_deinit(void *priv)
3938 {
3939 struct wpa_driver_nl80211_data *drv = priv;
3940 struct i802_bss *bss, *prev;
3941
3942 if (drv->last_freq_ht) {
3943 /* Clear HT flags from the driver */
3944 struct hostapd_freq_params freq;
3945 os_memset(&freq, 0, sizeof(freq));
3946 freq.freq = drv->last_freq;
3947 i802_set_freq(priv, &freq);
3948 }
3949
3950 i802_del_beacon(drv);
3951
3952 /* remove monitor interface */
3953 nl80211_remove_iface(drv, drv->monitor_ifidx);
3954
3955 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
3956
3957 if (drv->monitor_sock >= 0) {
3958 eloop_unregister_read_sock(drv->monitor_sock);
3959 close(drv->monitor_sock);
3960 }
3961 if (drv->ioctl_sock >= 0)
3962 close(drv->ioctl_sock);
3963 if (drv->eapol_sock >= 0) {
3964 eloop_unregister_read_sock(drv->eapol_sock);
3965 close(drv->eapol_sock);
3966 }
3967
3968 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
3969 genl_family_put(drv->nl80211);
3970 nl_cache_free(drv->nl_cache);
3971 nl_handle_destroy(drv->nl_handle);
3972 nl_cb_put(drv->nl_cb);
3973
3974 if (drv->if_indices != drv->default_if_indices)
3975 free(drv->if_indices);
3976
3977 bss = drv->bss.next;
3978 while (bss) {
3979 prev = bss;
3980 bss = bss->next;
3981 os_free(bss);
3982 }
3983
3984 free(drv);
3985 }
3986
3987 #endif /* HOSTAPD */
3988
3989
3990 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
3991 .name = "nl80211",
3992 .desc = "Linux nl80211/cfg80211",
3993 .get_bssid = wpa_driver_nl80211_get_bssid,
3994 .get_ssid = wpa_driver_nl80211_get_ssid,
3995 .set_key = wpa_driver_nl80211_set_key,
3996 .scan2 = wpa_driver_nl80211_scan,
3997 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
3998 .deauthenticate = wpa_driver_nl80211_deauthenticate,
3999 .disassociate = wpa_driver_nl80211_disassociate,
4000 .authenticate = wpa_driver_nl80211_authenticate,
4001 .associate = wpa_driver_nl80211_associate,
4002 .init = wpa_driver_nl80211_init,
4003 .deinit = wpa_driver_nl80211_deinit,
4004 .get_capa = wpa_driver_nl80211_get_capa,
4005 .set_operstate = wpa_driver_nl80211_set_operstate,
4006 .set_country = wpa_driver_nl80211_set_country,
4007 .set_mode = wpa_driver_nl80211_set_mode,
4008 #ifdef CONFIG_AP
4009 .set_beacon = wpa_driver_nl80211_set_beacon,
4010 #endif /* CONFIG_AP */
4011 #if defined(CONFIG_AP) || defined(HOSTAPD)
4012 .send_mlme = wpa_driver_nl80211_send_mlme,
4013 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4014 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4015 #endif /* CONFIG_AP || HOSTAPD */
4016 #ifdef HOSTAPD
4017 .hapd_init = i802_init,
4018 .hapd_deinit = i802_deinit,
4019 .hapd_set_key = i802_set_key,
4020 .get_seqnum = i802_get_seqnum,
4021 .flush = i802_flush,
4022 .read_sta_data = i802_read_sta_data,
4023 .hapd_send_eapol = i802_send_eapol,
4024 .sta_set_flags = i802_sta_set_flags,
4025 .sta_deauth = i802_sta_deauth,
4026 .sta_disassoc = i802_sta_disassoc,
4027 .sta_remove = i802_sta_remove,
4028 .sta_add = i802_sta_add,
4029 .get_inact_sec = i802_get_inact_sec,
4030 .sta_clear_stats = i802_sta_clear_stats,
4031 .set_freq = i802_set_freq,
4032 .set_rts = i802_set_rts,
4033 .set_frag = i802_set_frag,
4034 .set_retry = i802_set_retry,
4035 .set_rate_sets = i802_set_rate_sets,
4036 .hapd_set_beacon = i802_set_beacon,
4037 .set_cts_protect = i802_set_cts_protect,
4038 .set_preamble = i802_set_preamble,
4039 .set_short_slot_time = i802_set_short_slot_time,
4040 .set_tx_queue_params = i802_set_tx_queue_params,
4041 .bss_add = i802_bss_add,
4042 .bss_remove = i802_bss_remove,
4043 .if_add = i802_if_add,
4044 .if_update = i802_if_update,
4045 .if_remove = i802_if_remove,
4046 .set_sta_vlan = i802_set_sta_vlan,
4047 #endif /* HOSTAPD */
4048 };
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