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wpa_supplicant AP: Add sta_set_flags
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <net/if_arp.h>
22 #include <net/if.h>
23 #include <netlink/genl/genl.h>
24 #include <netlink/genl/family.h>
25 #include <netlink/genl/ctrl.h>
26 #include "nl80211_copy.h"
27 #ifndef NO_WEXT
28 #include "wireless_copy.h"
29 #endif /* NO_WEXT */
30
31 #include "common.h"
32 #include "driver.h"
33 #include "eloop.h"
34 #include "ieee802_11_defs.h"
35
36 #if defined(CONFIG_AP) || defined(HOSTAPD)
37 #include <netpacket/packet.h>
38 #include <linux/filter.h>
39 #include "radiotap.h"
40 #include "radiotap_iter.h"
41
42 #include "../../hostapd/hostapd_defs.h"
43 #include "../../hostapd/sta_flags.h"
44 #endif /* CONFIG_AP || HOSTAPD */
45
46 #ifdef HOSTAPD
47 #include "ieee802_11_common.h"
48
49 #ifdef CONFIG_LIBNL20
50 /* libnl 2.0 compatibility code */
51 #define nl_handle_alloc_cb nl_socket_alloc_cb
52 #define nl_handle_destroy nl_socket_free
53 #endif /* CONFIG_LIBNL20 */
54
55 #endif /* HOSTAPD */
56
57
58 #ifndef IFF_LOWER_UP
59 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
60 #endif
61 #ifndef IFF_DORMANT
62 #define IFF_DORMANT 0x20000 /* driver signals dormant */
63 #endif
64
65 #ifndef IF_OPER_DORMANT
66 #define IF_OPER_DORMANT 5
67 #endif
68 #ifndef IF_OPER_UP
69 #define IF_OPER_UP 6
70 #endif
71
72 struct i802_bss {
73 struct i802_bss *next;
74 int ifindex;
75 unsigned int beacon_set:1;
76 };
77
78 struct wpa_driver_nl80211_data {
79 void *ctx;
80 int link_event_sock;
81 int ioctl_sock; /* socket for ioctl() use */
82 char ifname[IFNAMSIZ + 1];
83 int ifindex;
84 int if_removed;
85 struct wpa_driver_capa capa;
86 int has_capability;
87
88 int operstate;
89
90 int scan_complete_events;
91
92 struct nl_handle *nl_handle;
93 struct nl_cache *nl_cache;
94 struct nl_cb *nl_cb;
95 struct genl_family *nl80211;
96
97 u8 bssid[ETH_ALEN];
98 int associated;
99 u8 ssid[32];
100 size_t ssid_len;
101 int nlmode;
102 int ap_scan_as_station;
103
104 int beacon_int;
105 int monitor_sock;
106 int monitor_ifidx;
107
108 #ifdef CONFIG_AP
109 unsigned int beacon_set:1;
110 #endif /* CONFIG_AP */
111
112 #ifdef HOSTAPD
113 int eapol_sock; /* socket for EAPOL frames */
114
115 int default_if_indices[16];
116 int *if_indices;
117 int num_if_indices;
118
119 struct i802_bss bss;
120
121 int last_freq;
122 int last_freq_ht;
123 #endif /* HOSTAPD */
124 };
125
126
127 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
128 void *timeout_ctx);
129 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
130 static int
131 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
132
133 #if defined(CONFIG_AP) || defined(HOSTAPD)
134 static void nl80211_remove_monitor_interface(
135 struct wpa_driver_nl80211_data *drv);
136 #endif /* CONFIG_AP || HOSTAPD */
137
138 #ifdef CONFIG_AP
139 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
140 int ifidx);
141 #endif /* CONFIG_AP */
142
143 #ifdef HOSTAPD
144 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
145 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
146 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
147 int ifindex);
148 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
149 int ifidx);
150 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
151 #endif /* HOSTAPD */
152
153
154 /* nl80211 code */
155 static int ack_handler(struct nl_msg *msg, void *arg)
156 {
157 int *err = arg;
158 *err = 0;
159 return NL_STOP;
160 }
161
162 static int finish_handler(struct nl_msg *msg, void *arg)
163 {
164 int *ret = arg;
165 *ret = 0;
166 return NL_SKIP;
167 }
168
169 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
170 void *arg)
171 {
172 int *ret = arg;
173 *ret = err->error;
174 return NL_SKIP;
175 }
176
177
178 static int no_seq_check(struct nl_msg *msg, void *arg)
179 {
180 return NL_OK;
181 }
182
183
184 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
185 struct nl_msg *msg,
186 int (*valid_handler)(struct nl_msg *, void *),
187 void *valid_data)
188 {
189 struct nl_cb *cb;
190 int err = -ENOMEM;
191
192 cb = nl_cb_clone(drv->nl_cb);
193 if (!cb)
194 goto out;
195
196 err = nl_send_auto_complete(drv->nl_handle, msg);
197 if (err < 0)
198 goto out;
199
200 err = 1;
201
202 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
203 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
204 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
205
206 if (valid_handler)
207 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
208 valid_handler, valid_data);
209
210 while (err > 0)
211 nl_recvmsgs(drv->nl_handle, cb);
212 out:
213 nl_cb_put(cb);
214 nlmsg_free(msg);
215 return err;
216 }
217
218
219 struct family_data {
220 const char *group;
221 int id;
222 };
223
224
225 static int family_handler(struct nl_msg *msg, void *arg)
226 {
227 struct family_data *res = arg;
228 struct nlattr *tb[CTRL_ATTR_MAX + 1];
229 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
230 struct nlattr *mcgrp;
231 int i;
232
233 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
234 genlmsg_attrlen(gnlh, 0), NULL);
235 if (!tb[CTRL_ATTR_MCAST_GROUPS])
236 return NL_SKIP;
237
238 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
239 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
240 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
241 nla_len(mcgrp), NULL);
242 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
243 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
244 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
245 res->group,
246 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
247 continue;
248 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
249 break;
250 };
251
252 return NL_SKIP;
253 }
254
255
256 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
257 const char *family, const char *group)
258 {
259 struct nl_msg *msg;
260 int ret = -1;
261 struct family_data res = { group, -ENOENT };
262
263 msg = nlmsg_alloc();
264 if (!msg)
265 return -ENOMEM;
266 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
267 0, 0, CTRL_CMD_GETFAMILY, 0);
268 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
269
270 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
271 msg = NULL;
272 if (ret == 0)
273 ret = res.id;
274
275 nla_put_failure:
276 nlmsg_free(msg);
277 return ret;
278 }
279
280
281 #ifdef HOSTAPD
282 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
283 const char *ifname, u8 *addr)
284 {
285 struct ifreq ifr;
286
287 os_memset(&ifr, 0, sizeof(ifr));
288 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
289 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
290 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
291 ifname, errno, strerror(errno));
292 return -1;
293 }
294
295 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
296 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
297 ifname, ifr.ifr_hwaddr.sa_family);
298 return -1;
299 }
300 os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
301
302 return 0;
303 }
304
305
306 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
307 const char *ifname, const u8 *addr)
308 {
309 struct ifreq ifr;
310
311 os_memset(&ifr, 0, sizeof(ifr));
312 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
313 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
314 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
315
316 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
317 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
318 ifname, errno, strerror(errno));
319 return -1;
320 }
321
322 return 0;
323 }
324 #endif /* HOSTAPD */
325
326
327 #ifndef HOSTAPD
328
329 static int wpa_driver_nl80211_send_oper_ifla(
330 struct wpa_driver_nl80211_data *drv,
331 int linkmode, int operstate)
332 {
333 struct {
334 struct nlmsghdr hdr;
335 struct ifinfomsg ifinfo;
336 char opts[16];
337 } req;
338 struct rtattr *rta;
339 static int nl_seq;
340 ssize_t ret;
341
342 os_memset(&req, 0, sizeof(req));
343
344 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
345 req.hdr.nlmsg_type = RTM_SETLINK;
346 req.hdr.nlmsg_flags = NLM_F_REQUEST;
347 req.hdr.nlmsg_seq = ++nl_seq;
348 req.hdr.nlmsg_pid = 0;
349
350 req.ifinfo.ifi_family = AF_UNSPEC;
351 req.ifinfo.ifi_type = 0;
352 req.ifinfo.ifi_index = drv->ifindex;
353 req.ifinfo.ifi_flags = 0;
354 req.ifinfo.ifi_change = 0;
355
356 if (linkmode != -1) {
357 rta = (struct rtattr *)
358 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
359 rta->rta_type = IFLA_LINKMODE;
360 rta->rta_len = RTA_LENGTH(sizeof(char));
361 *((char *) RTA_DATA(rta)) = linkmode;
362 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
363 RTA_LENGTH(sizeof(char));
364 }
365 if (operstate != -1) {
366 rta = (struct rtattr *)
367 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
368 rta->rta_type = IFLA_OPERSTATE;
369 rta->rta_len = RTA_LENGTH(sizeof(char));
370 *((char *) RTA_DATA(rta)) = operstate;
371 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
372 RTA_LENGTH(sizeof(char));
373 }
374
375 wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
376 linkmode, operstate);
377
378 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
379 if (ret < 0) {
380 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
381 " %s (assume operstate is not supported)",
382 strerror(errno));
383 }
384
385 return ret < 0 ? -1 : 0;
386 }
387
388
389 #ifndef NO_WEXT
390 static int wpa_driver_nl80211_set_auth_param(
391 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
392 {
393 struct iwreq iwr;
394 int ret = 0;
395
396 os_memset(&iwr, 0, sizeof(iwr));
397 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
398 iwr.u.param.flags = idx & IW_AUTH_INDEX;
399 iwr.u.param.value = value;
400
401 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
402 if (errno != EOPNOTSUPP) {
403 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
404 "value 0x%x) failed: %s)",
405 idx, value, strerror(errno));
406 }
407 ret = errno == EOPNOTSUPP ? -2 : -1;
408 }
409
410 return ret;
411 }
412 #endif /* NO_WEXT */
413
414
415 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
416 {
417 struct wpa_driver_nl80211_data *drv = priv;
418 if (!drv->associated)
419 return -1;
420 os_memcpy(bssid, drv->bssid, ETH_ALEN);
421 return 0;
422 }
423
424
425 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
426 {
427 struct wpa_driver_nl80211_data *drv = priv;
428 if (!drv->associated)
429 return -1;
430 os_memcpy(ssid, drv->ssid, drv->ssid_len);
431 return drv->ssid_len;
432 }
433
434
435 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
436 void *ctx, char *buf, size_t len,
437 int del)
438 {
439 union wpa_event_data event;
440
441 os_memset(&event, 0, sizeof(event));
442 if (len > sizeof(event.interface_status.ifname))
443 len = sizeof(event.interface_status.ifname) - 1;
444 os_memcpy(event.interface_status.ifname, buf, len);
445 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
446 EVENT_INTERFACE_ADDED;
447
448 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
449 del ? "DEL" : "NEW",
450 event.interface_status.ifname,
451 del ? "removed" : "added");
452
453 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
454 if (del)
455 drv->if_removed = 1;
456 else
457 drv->if_removed = 0;
458 }
459
460 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
461 }
462
463
464 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
465 struct nlmsghdr *h)
466 {
467 struct ifinfomsg *ifi;
468 int attrlen, _nlmsg_len, rta_len;
469 struct rtattr *attr;
470
471 ifi = NLMSG_DATA(h);
472
473 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
474
475 attrlen = h->nlmsg_len - _nlmsg_len;
476 if (attrlen < 0)
477 return 0;
478
479 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
480
481 rta_len = RTA_ALIGN(sizeof(struct rtattr));
482 while (RTA_OK(attr, attrlen)) {
483 if (attr->rta_type == IFLA_IFNAME) {
484 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
485 == 0)
486 return 1;
487 else
488 break;
489 }
490 attr = RTA_NEXT(attr, attrlen);
491 }
492
493 return 0;
494 }
495
496
497 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
498 int ifindex, struct nlmsghdr *h)
499 {
500 if (drv->ifindex == ifindex)
501 return 1;
502
503 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
504 drv->ifindex = if_nametoindex(drv->ifname);
505 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
506 "interface");
507 wpa_driver_nl80211_finish_drv_init(drv);
508 return 1;
509 }
510
511 return 0;
512 }
513
514
515 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
516 void *ctx, struct nlmsghdr *h,
517 size_t len)
518 {
519 struct ifinfomsg *ifi;
520 int attrlen, _nlmsg_len, rta_len;
521 struct rtattr * attr;
522
523 if (len < sizeof(*ifi))
524 return;
525
526 ifi = NLMSG_DATA(h);
527
528 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
529 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
530 ifi->ifi_index);
531 return;
532 }
533
534 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
535 "(%s%s%s%s)",
536 drv->operstate, ifi->ifi_flags,
537 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
538 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
539 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
540 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
541 /*
542 * Some drivers send the association event before the operup event--in
543 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
544 * fails. This will hit us when wpa_supplicant does not need to do
545 * IEEE 802.1X authentication
546 */
547 if (drv->operstate == 1 &&
548 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
549 !(ifi->ifi_flags & IFF_RUNNING))
550 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
551
552 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
553
554 attrlen = h->nlmsg_len - _nlmsg_len;
555 if (attrlen < 0)
556 return;
557
558 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
559
560 rta_len = RTA_ALIGN(sizeof(struct rtattr));
561 while (RTA_OK(attr, attrlen)) {
562 if (attr->rta_type == IFLA_IFNAME) {
563 wpa_driver_nl80211_event_link(
564 drv, ctx,
565 ((char *) attr) + rta_len,
566 attr->rta_len - rta_len, 0);
567 }
568 attr = RTA_NEXT(attr, attrlen);
569 }
570 }
571
572
573 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
574 void *ctx, struct nlmsghdr *h,
575 size_t len)
576 {
577 struct ifinfomsg *ifi;
578 int attrlen, _nlmsg_len, rta_len;
579 struct rtattr * attr;
580
581 if (len < sizeof(*ifi))
582 return;
583
584 ifi = NLMSG_DATA(h);
585
586 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
587
588 attrlen = h->nlmsg_len - _nlmsg_len;
589 if (attrlen < 0)
590 return;
591
592 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
593
594 rta_len = RTA_ALIGN(sizeof(struct rtattr));
595 while (RTA_OK(attr, attrlen)) {
596 if (attr->rta_type == IFLA_IFNAME) {
597 wpa_driver_nl80211_event_link(
598 drv, ctx,
599 ((char *) attr) + rta_len,
600 attr->rta_len - rta_len, 1);
601 }
602 attr = RTA_NEXT(attr, attrlen);
603 }
604 }
605
606
607 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
608 void *sock_ctx)
609 {
610 char buf[8192];
611 int left;
612 struct sockaddr_nl from;
613 socklen_t fromlen;
614 struct nlmsghdr *h;
615 int max_events = 10;
616
617 try_again:
618 fromlen = sizeof(from);
619 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
620 (struct sockaddr *) &from, &fromlen);
621 if (left < 0) {
622 if (errno != EINTR && errno != EAGAIN)
623 perror("recvfrom(netlink)");
624 return;
625 }
626
627 h = (struct nlmsghdr *) buf;
628 while (left >= (int) sizeof(*h)) {
629 int len, plen;
630
631 len = h->nlmsg_len;
632 plen = len - sizeof(*h);
633 if (len > left || plen < 0) {
634 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
635 "len=%d left=%d plen=%d",
636 len, left, plen);
637 break;
638 }
639
640 switch (h->nlmsg_type) {
641 case RTM_NEWLINK:
642 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
643 h, plen);
644 break;
645 case RTM_DELLINK:
646 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
647 h, plen);
648 break;
649 }
650
651 len = NLMSG_ALIGN(len);
652 left -= len;
653 h = (struct nlmsghdr *) ((char *) h + len);
654 }
655
656 if (left > 0) {
657 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
658 "message", left);
659 }
660
661 if (--max_events > 0) {
662 /*
663 * Try to receive all events in one eloop call in order to
664 * limit race condition on cases where AssocInfo event, Assoc
665 * event, and EAPOL frames are received more or less at the
666 * same time. We want to process the event messages first
667 * before starting EAPOL processing.
668 */
669 goto try_again;
670 }
671 }
672
673
674 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
675 const u8 *frame, size_t len)
676 {
677 const struct ieee80211_mgmt *mgmt;
678 union wpa_event_data event;
679
680 mgmt = (const struct ieee80211_mgmt *) frame;
681 if (len < 24 + sizeof(mgmt->u.auth)) {
682 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
683 "frame");
684 return;
685 }
686
687 os_memset(&event, 0, sizeof(event));
688 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
689 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
690 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
691 if (len > 24 + sizeof(mgmt->u.auth)) {
692 event.auth.ies = mgmt->u.auth.variable;
693 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
694 }
695
696 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
697 }
698
699
700 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
701 const u8 *frame, size_t len)
702 {
703 const struct ieee80211_mgmt *mgmt;
704 union wpa_event_data event;
705 u16 status;
706
707 mgmt = (const struct ieee80211_mgmt *) frame;
708 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
709 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
710 "frame");
711 return;
712 }
713
714 status = le_to_host16(mgmt->u.assoc_resp.status_code);
715 if (status != WLAN_STATUS_SUCCESS) {
716 os_memset(&event, 0, sizeof(event));
717 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
718 event.assoc_reject.resp_ies =
719 (u8 *) mgmt->u.assoc_resp.variable;
720 event.assoc_reject.resp_ies_len =
721 len - 24 - sizeof(mgmt->u.assoc_resp);
722 }
723 event.assoc_reject.status_code = status;
724
725 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
726 return;
727 }
728
729 drv->associated = 1;
730 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
731
732 os_memset(&event, 0, sizeof(event));
733 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
734 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
735 event.assoc_info.resp_ies_len =
736 len - 24 - sizeof(mgmt->u.assoc_resp);
737 }
738
739 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
740 }
741
742
743 static void mlme_event(struct wpa_driver_nl80211_data *drv,
744 enum nl80211_commands cmd, struct nlattr *frame)
745 {
746 if (frame == NULL) {
747 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
748 "data", cmd);
749 return;
750 }
751
752 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
753 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
754 nla_data(frame), nla_len(frame));
755
756 switch (cmd) {
757 case NL80211_CMD_AUTHENTICATE:
758 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
759 break;
760 case NL80211_CMD_ASSOCIATE:
761 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
762 break;
763 case NL80211_CMD_DEAUTHENTICATE:
764 drv->associated = 0;
765 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
766 break;
767 case NL80211_CMD_DISASSOCIATE:
768 drv->associated = 0;
769 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
770 break;
771 default:
772 break;
773 }
774 }
775
776 #endif /* HOSTAPD */
777
778
779 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
780 struct nlattr *tb[])
781 {
782 union wpa_event_data data;
783
784 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
785 os_memset(&data, 0, sizeof(data));
786 if (tb[NL80211_ATTR_MAC]) {
787 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
788 nla_data(tb[NL80211_ATTR_MAC]),
789 nla_len(tb[NL80211_ATTR_MAC]));
790 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
791 }
792 if (tb[NL80211_ATTR_KEY_SEQ]) {
793 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
794 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
795 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
796 }
797 if (tb[NL80211_ATTR_KEY_TYPE]) {
798 enum nl80211_key_type key_type =
799 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
800 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
801 if (key_type == NL80211_KEYTYPE_PAIRWISE)
802 data.michael_mic_failure.unicast = 1;
803 } else
804 data.michael_mic_failure.unicast = 1;
805
806 if (tb[NL80211_ATTR_KEY_IDX]) {
807 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
808 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
809 }
810
811 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
812 }
813
814
815 static int process_event(struct nl_msg *msg, void *arg)
816 {
817 struct wpa_driver_nl80211_data *drv = arg;
818 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
819 struct nlattr *tb[NL80211_ATTR_MAX + 1];
820
821 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
822 genlmsg_attrlen(gnlh, 0), NULL);
823
824 if (tb[NL80211_ATTR_IFINDEX]) {
825 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
826 if (ifindex != drv->ifindex) {
827 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
828 " for foreign interface (ifindex %d)",
829 gnlh->cmd, ifindex);
830 return NL_SKIP;
831 }
832 }
833
834 if (drv->ap_scan_as_station &&
835 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
836 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
837 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
838 drv->ap_scan_as_station = 0;
839 }
840
841 switch (gnlh->cmd) {
842 case NL80211_CMD_NEW_SCAN_RESULTS:
843 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
844 drv->scan_complete_events = 1;
845 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
846 drv->ctx);
847 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
848 break;
849 case NL80211_CMD_SCAN_ABORTED:
850 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
851 /*
852 * Need to indicate that scan results are available in order
853 * not to make wpa_supplicant stop its scanning.
854 */
855 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
856 drv->ctx);
857 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
858 break;
859 #ifndef HOSTAPD
860 case NL80211_CMD_AUTHENTICATE:
861 case NL80211_CMD_ASSOCIATE:
862 case NL80211_CMD_DEAUTHENTICATE:
863 case NL80211_CMD_DISASSOCIATE:
864 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
865 break;
866 #endif /* HOSTAPD */
867 case NL80211_CMD_MICHAEL_MIC_FAILURE:
868 mlme_event_michael_mic_failure(drv, tb);
869 break;
870 default:
871 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
872 "(cmd=%d)", gnlh->cmd);
873 break;
874 }
875
876 return NL_SKIP;
877 }
878
879
880 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
881 void *sock_ctx)
882 {
883 struct nl_cb *cb;
884 struct wpa_driver_nl80211_data *drv = eloop_ctx;
885
886 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
887
888 cb = nl_cb_clone(drv->nl_cb);
889 if (!cb)
890 return;
891 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
892 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
893 nl_recvmsgs(drv->nl_handle, cb);
894 nl_cb_put(cb);
895 }
896
897
898 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
899 const char *ifname, int dev_up)
900 {
901 struct ifreq ifr;
902
903 if (drv->ioctl_sock < 0)
904 return -1;
905
906 os_memset(&ifr, 0, sizeof(ifr));
907 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
908
909 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
910 perror("ioctl[SIOCGIFFLAGS]");
911 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
912 ifname);
913 return -1;
914 }
915
916 if (dev_up) {
917 if (ifr.ifr_flags & IFF_UP)
918 return 0;
919 ifr.ifr_flags |= IFF_UP;
920 } else {
921 if (!(ifr.ifr_flags & IFF_UP))
922 return 0;
923 ifr.ifr_flags &= ~IFF_UP;
924 }
925
926 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
927 perror("ioctl[SIOCSIFFLAGS]");
928 return -1;
929 }
930
931 return 0;
932 }
933
934
935 /**
936 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
937 * @priv: driver_nl80211 private data
938 * @alpha2_arg: country to which to switch to
939 * Returns: 0 on success, -1 on failure
940 *
941 * This asks nl80211 to set the regulatory domain for given
942 * country ISO / IEC alpha2.
943 */
944 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
945 {
946 struct wpa_driver_nl80211_data *drv = priv;
947 char alpha2[3];
948 struct nl_msg *msg;
949
950 msg = nlmsg_alloc();
951 if (!msg)
952 return -ENOMEM;
953
954 alpha2[0] = alpha2_arg[0];
955 alpha2[1] = alpha2_arg[1];
956 alpha2[2] = '\0';
957
958 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
959 0, NL80211_CMD_REQ_SET_REG, 0);
960
961 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
962 if (send_and_recv_msgs(drv, msg, NULL, NULL))
963 return -EINVAL;
964 return 0;
965 nla_put_failure:
966 return -EINVAL;
967 }
968
969
970 #ifndef HOSTAPD
971 struct wiphy_info_data {
972 int max_scan_ssids;
973 int ap_supported;
974 };
975
976
977 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
978 {
979 struct nlattr *tb[NL80211_ATTR_MAX + 1];
980 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
981 struct wiphy_info_data *info = arg;
982
983 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
984 genlmsg_attrlen(gnlh, 0), NULL);
985
986 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
987 info->max_scan_ssids =
988 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
989
990 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
991 struct nlattr *nl_mode;
992 int i;
993 nla_for_each_nested(nl_mode,
994 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
995 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
996 info->ap_supported = 1;
997 break;
998 }
999 }
1000 }
1001
1002 return NL_SKIP;
1003 }
1004
1005
1006 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1007 struct wiphy_info_data *info)
1008 {
1009 struct nl_msg *msg;
1010
1011 os_memset(info, 0, sizeof(*info));
1012 msg = nlmsg_alloc();
1013 if (!msg)
1014 return -1;
1015
1016 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1017 0, NL80211_CMD_GET_WIPHY, 0);
1018
1019 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1020
1021 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1022 return 0;
1023 msg = NULL;
1024 nla_put_failure:
1025 nlmsg_free(msg);
1026 return -1;
1027 }
1028
1029
1030 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1031 {
1032 struct wiphy_info_data info;
1033 if (wpa_driver_nl80211_get_info(drv, &info))
1034 return;
1035 drv->has_capability = 1;
1036 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1037 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1038 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1039 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1040 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1041 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1042 WPA_DRIVER_CAPA_ENC_WEP104 |
1043 WPA_DRIVER_CAPA_ENC_TKIP |
1044 WPA_DRIVER_CAPA_ENC_CCMP;
1045
1046 drv->capa.max_scan_ssids = info.max_scan_ssids;
1047 if (info.ap_supported)
1048 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1049 }
1050 #endif /* HOSTAPD */
1051
1052
1053 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1054 void *ctx)
1055 {
1056 int ret;
1057
1058 /* Initialize generic netlink and nl80211 */
1059
1060 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1061 if (drv->nl_cb == NULL) {
1062 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1063 "callbacks");
1064 goto err1;
1065 }
1066
1067 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1068 if (drv->nl_handle == NULL) {
1069 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1070 "callbacks");
1071 goto err2;
1072 }
1073
1074 if (genl_connect(drv->nl_handle)) {
1075 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1076 "netlink");
1077 goto err3;
1078 }
1079
1080 #ifdef CONFIG_LIBNL20
1081 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1082 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1083 "netlink cache");
1084 goto err3;
1085 }
1086 #else /* CONFIG_LIBNL20 */
1087 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1088 if (drv->nl_cache == NULL) {
1089 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1090 "netlink cache");
1091 goto err3;
1092 }
1093 #endif /* CONFIG_LIBNL20 */
1094
1095
1096 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1097 if (drv->nl80211 == NULL) {
1098 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1099 "found");
1100 goto err4;
1101 }
1102
1103 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1104 if (ret >= 0)
1105 ret = nl_socket_add_membership(drv->nl_handle, ret);
1106 if (ret < 0) {
1107 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1108 "membership for scan events: %d (%s)",
1109 ret, strerror(-ret));
1110 goto err4;
1111 }
1112
1113 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1114 if (ret >= 0)
1115 ret = nl_socket_add_membership(drv->nl_handle, ret);
1116 if (ret < 0) {
1117 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1118 "membership for mlme events: %d (%s)",
1119 ret, strerror(-ret));
1120 goto err4;
1121 }
1122
1123 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1124 wpa_driver_nl80211_event_receive, drv, ctx);
1125
1126 return 0;
1127
1128 err4:
1129 nl_cache_free(drv->nl_cache);
1130 err3:
1131 nl_handle_destroy(drv->nl_handle);
1132 err2:
1133 nl_cb_put(drv->nl_cb);
1134 err1:
1135 return -1;
1136 }
1137
1138
1139 static int wpa_driver_nl80211_init_link_events(
1140 struct wpa_driver_nl80211_data *drv)
1141 {
1142 #ifdef HOSTAPD
1143 return 0;
1144 #else /* HOSTAPD */
1145 int s;
1146 struct sockaddr_nl local;
1147
1148 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1149 if (s < 0) {
1150 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1151 return -1;
1152 }
1153
1154 os_memset(&local, 0, sizeof(local));
1155 local.nl_family = AF_NETLINK;
1156 local.nl_groups = RTMGRP_LINK;
1157 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1158 perror("bind(netlink)");
1159 close(s);
1160 return -1;
1161 }
1162
1163 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1164 drv->ctx);
1165 drv->link_event_sock = s;
1166
1167 return 0;
1168 #endif /* HOSTAPD */
1169 }
1170
1171
1172 /**
1173 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1174 * @ctx: context to be used when calling wpa_supplicant functions,
1175 * e.g., wpa_supplicant_event()
1176 * @ifname: interface name, e.g., wlan0
1177 * Returns: Pointer to private data, %NULL on failure
1178 */
1179 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1180 {
1181 struct wpa_driver_nl80211_data *drv;
1182
1183 drv = os_zalloc(sizeof(*drv));
1184 if (drv == NULL)
1185 return NULL;
1186 drv->ctx = ctx;
1187 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1188 drv->monitor_ifidx = -1;
1189 drv->monitor_sock = -1;
1190 drv->link_event_sock = -1;
1191 drv->ioctl_sock = -1;
1192
1193 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1194 os_free(drv);
1195 return NULL;
1196 }
1197
1198 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1199
1200 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1201 if (drv->ioctl_sock < 0) {
1202 perror("socket(PF_INET,SOCK_DGRAM)");
1203 goto failed;
1204 }
1205
1206 if (wpa_driver_nl80211_init_link_events(drv) ||
1207 wpa_driver_nl80211_finish_drv_init(drv))
1208 goto failed;
1209
1210 return drv;
1211
1212 failed:
1213 if (drv->link_event_sock >= 0) {
1214 eloop_unregister_read_sock(drv->link_event_sock);
1215 close(drv->link_event_sock);
1216 }
1217 if (drv->ioctl_sock >= 0)
1218 close(drv->ioctl_sock);
1219
1220 genl_family_put(drv->nl80211);
1221 nl_cache_free(drv->nl_cache);
1222 nl_handle_destroy(drv->nl_handle);
1223 nl_cb_put(drv->nl_cb);
1224
1225 os_free(drv);
1226 return NULL;
1227 }
1228
1229
1230 static int
1231 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1232 {
1233 drv->ifindex = if_nametoindex(drv->ifname);
1234
1235 #ifndef HOSTAPD
1236 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1237 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1238 "use managed mode");
1239 }
1240
1241 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1242 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1243 "UP", drv->ifname);
1244 return -1;
1245 }
1246
1247 wpa_driver_nl80211_capa(drv);
1248
1249 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1250 #endif /* HOSTAPD */
1251
1252 return 0;
1253 }
1254
1255
1256 #ifdef HOSTAPD
1257 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1258 {
1259 struct i802_bss *bss, *prev;
1260 bss = drv->bss.next;
1261 while (bss) {
1262 prev = bss;
1263 bss = bss->next;
1264 os_free(bss);
1265 }
1266 }
1267 #endif /* HOSTAPD */
1268
1269
1270 #if defined(CONFIG_AP) || defined(HOSTAPD)
1271 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1272 {
1273 struct nl_msg *msg;
1274
1275 msg = nlmsg_alloc();
1276 if (!msg)
1277 return -ENOMEM;
1278
1279 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1280 0, NL80211_CMD_DEL_BEACON, 0);
1281 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1282
1283 return send_and_recv_msgs(drv, msg, NULL, NULL);
1284 nla_put_failure:
1285 return -ENOBUFS;
1286 }
1287 #endif /* CONFIG_AP || HOSTAPD */
1288
1289
1290 /**
1291 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1292 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1293 *
1294 * Shut down driver interface and processing of driver events. Free
1295 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1296 */
1297 static void wpa_driver_nl80211_deinit(void *priv)
1298 {
1299 struct wpa_driver_nl80211_data *drv = priv;
1300
1301 #if defined(CONFIG_AP) || defined(HOSTAPD)
1302 nl80211_remove_monitor_interface(drv);
1303 if (drv->monitor_sock >= 0) {
1304 eloop_unregister_read_sock(drv->monitor_sock);
1305 close(drv->monitor_sock);
1306 }
1307
1308 if (drv->nlmode == NL80211_IFTYPE_AP)
1309 wpa_driver_nl80211_del_beacon(drv);
1310 #endif /* CONFIG_AP || HOSTAPD */
1311
1312 #ifdef HOSTAPD
1313 if (drv->last_freq_ht) {
1314 /* Clear HT flags from the driver */
1315 struct hostapd_freq_params freq;
1316 os_memset(&freq, 0, sizeof(freq));
1317 freq.freq = drv->last_freq;
1318 i802_set_freq(priv, &freq);
1319 }
1320
1321 if (drv->eapol_sock >= 0) {
1322 eloop_unregister_read_sock(drv->eapol_sock);
1323 close(drv->eapol_sock);
1324 }
1325
1326 if (drv->if_indices != drv->default_if_indices)
1327 os_free(drv->if_indices);
1328
1329 wpa_driver_nl80211_free_bss(drv);
1330 #else /* HOSTAPD */
1331 #ifndef NO_WEXT
1332 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1333 #endif /* NO_WEXT */
1334
1335 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1336
1337 if (drv->link_event_sock >= 0) {
1338 eloop_unregister_read_sock(drv->link_event_sock);
1339 close(drv->link_event_sock);
1340 }
1341 #endif /* HOSTAPD */
1342
1343 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1344
1345 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1346 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1347
1348 if (drv->ioctl_sock >= 0)
1349 close(drv->ioctl_sock);
1350
1351 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1352 genl_family_put(drv->nl80211);
1353 nl_cache_free(drv->nl_cache);
1354 nl_handle_destroy(drv->nl_handle);
1355 nl_cb_put(drv->nl_cb);
1356
1357 os_free(drv);
1358 }
1359
1360
1361 /**
1362 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1363 * @eloop_ctx: Driver private data
1364 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1365 *
1366 * This function can be used as registered timeout when starting a scan to
1367 * generate a scan completed event if the driver does not report this.
1368 */
1369 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1370 {
1371 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1372 if (drv->ap_scan_as_station) {
1373 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1374 drv->ap_scan_as_station = 0;
1375 }
1376 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1377 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1378 }
1379
1380
1381 /**
1382 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1383 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1384 * @params: Scan parameters
1385 * Returns: 0 on success, -1 on failure
1386 */
1387 static int wpa_driver_nl80211_scan(void *priv,
1388 struct wpa_driver_scan_params *params)
1389 {
1390 struct wpa_driver_nl80211_data *drv = priv;
1391 int ret = 0, timeout;
1392 struct nl_msg *msg, *ssids, *freqs;
1393 size_t i;
1394
1395 msg = nlmsg_alloc();
1396 ssids = nlmsg_alloc();
1397 freqs = nlmsg_alloc();
1398 if (!msg || !ssids || !freqs) {
1399 nlmsg_free(msg);
1400 nlmsg_free(ssids);
1401 nlmsg_free(freqs);
1402 return -1;
1403 }
1404
1405 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1406 NL80211_CMD_TRIGGER_SCAN, 0);
1407
1408 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1409
1410 for (i = 0; i < params->num_ssids; i++) {
1411 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1412 params->ssids[i].ssid);
1413 }
1414 if (params->num_ssids)
1415 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1416
1417 if (params->extra_ies) {
1418 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1419 params->extra_ies);
1420 }
1421
1422 if (params->freqs) {
1423 for (i = 0; params->freqs[i]; i++)
1424 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1425 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1426 }
1427
1428 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1429 msg = NULL;
1430 if (ret) {
1431 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1432 "(%s)", ret, strerror(-ret));
1433 #ifdef HOSTAPD
1434 if (drv->nlmode == NL80211_IFTYPE_AP) {
1435 /*
1436 * mac80211 does not allow scan requests in AP mode, so
1437 * try to do this in station mode.
1438 */
1439 if (wpa_driver_nl80211_set_mode(drv,
1440 IEEE80211_MODE_INFRA))
1441 goto nla_put_failure;
1442
1443 if (wpa_driver_nl80211_scan(drv, params)) {
1444 wpa_driver_nl80211_set_mode(drv,
1445 IEEE80211_MODE_AP);
1446 goto nla_put_failure;
1447 }
1448
1449 /* Restore AP mode when processing scan results */
1450 drv->ap_scan_as_station = 1;
1451 ret = 0;
1452 } else
1453 goto nla_put_failure;
1454 #else /* HOSTAPD */
1455 goto nla_put_failure;
1456 #endif /* HOSTAPD */
1457 }
1458
1459 /* Not all drivers generate "scan completed" wireless event, so try to
1460 * read results after a timeout. */
1461 timeout = 10;
1462 if (drv->scan_complete_events) {
1463 /*
1464 * The driver seems to deliver events to notify when scan is
1465 * complete, so use longer timeout to avoid race conditions
1466 * with scanning and following association request.
1467 */
1468 timeout = 30;
1469 }
1470 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1471 "seconds", ret, timeout);
1472 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1473 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1474 drv, drv->ctx);
1475
1476 nla_put_failure:
1477 nlmsg_free(ssids);
1478 nlmsg_free(msg);
1479 nlmsg_free(freqs);
1480 return ret;
1481 }
1482
1483
1484 static int bss_info_handler(struct nl_msg *msg, void *arg)
1485 {
1486 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1487 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1488 struct nlattr *bss[NL80211_BSS_MAX + 1];
1489 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1490 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1491 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1492 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1493 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1494 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1495 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1496 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1497 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1498 };
1499 struct wpa_scan_results *res = arg;
1500 struct wpa_scan_res **tmp;
1501 struct wpa_scan_res *r;
1502 const u8 *ie;
1503 size_t ie_len;
1504
1505 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1506 genlmsg_attrlen(gnlh, 0), NULL);
1507 if (!tb[NL80211_ATTR_BSS])
1508 return NL_SKIP;
1509 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1510 bss_policy))
1511 return NL_SKIP;
1512 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1513 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1514 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1515 } else {
1516 ie = NULL;
1517 ie_len = 0;
1518 }
1519
1520 r = os_zalloc(sizeof(*r) + ie_len);
1521 if (r == NULL)
1522 return NL_SKIP;
1523 if (bss[NL80211_BSS_BSSID])
1524 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1525 ETH_ALEN);
1526 if (bss[NL80211_BSS_FREQUENCY])
1527 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1528 if (bss[NL80211_BSS_BEACON_INTERVAL])
1529 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1530 if (bss[NL80211_BSS_CAPABILITY])
1531 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1532 r->flags |= WPA_SCAN_NOISE_INVALID;
1533 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1534 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1535 r->level /= 100; /* mBm to dBm */
1536 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1537 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1538 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1539 r->flags |= WPA_SCAN_LEVEL_INVALID;
1540 } else
1541 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1542 if (bss[NL80211_BSS_TSF])
1543 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1544 r->ie_len = ie_len;
1545 if (ie)
1546 os_memcpy(r + 1, ie, ie_len);
1547
1548 tmp = os_realloc(res->res,
1549 (res->num + 1) * sizeof(struct wpa_scan_res *));
1550 if (tmp == NULL) {
1551 os_free(r);
1552 return NL_SKIP;
1553 }
1554 tmp[res->num++] = r;
1555 res->res = tmp;
1556
1557 return NL_SKIP;
1558 }
1559
1560
1561 /**
1562 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1563 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1564 * Returns: Scan results on success, -1 on failure
1565 */
1566 static struct wpa_scan_results *
1567 wpa_driver_nl80211_get_scan_results(void *priv)
1568 {
1569 struct wpa_driver_nl80211_data *drv = priv;
1570 struct nl_msg *msg;
1571 struct wpa_scan_results *res;
1572 int ret;
1573
1574 res = os_zalloc(sizeof(*res));
1575 if (res == NULL)
1576 return 0;
1577 msg = nlmsg_alloc();
1578 if (!msg)
1579 goto nla_put_failure;
1580
1581 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1582 NL80211_CMD_GET_SCAN, 0);
1583 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1584
1585 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1586 msg = NULL;
1587 if (ret == 0) {
1588 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1589 (unsigned long) res->num);
1590 return res;
1591 }
1592 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1593 "(%s)", ret, strerror(-ret));
1594 nla_put_failure:
1595 nlmsg_free(msg);
1596 wpa_scan_results_free(res);
1597 return NULL;
1598 }
1599
1600
1601 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1602 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1603 const u8 *seq, size_t seq_len,
1604 const u8 *key, size_t key_len)
1605 {
1606 struct nl_msg *msg;
1607 int ret;
1608
1609 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1610 "set_tx=%d seq_len=%lu key_len=%lu",
1611 __func__, ifindex, alg, addr, key_idx, set_tx,
1612 (unsigned long) seq_len, (unsigned long) key_len);
1613
1614 msg = nlmsg_alloc();
1615 if (!msg)
1616 return -ENOMEM;
1617
1618 if (alg == WPA_ALG_NONE) {
1619 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1620 0, NL80211_CMD_DEL_KEY, 0);
1621 } else {
1622 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1623 0, NL80211_CMD_NEW_KEY, 0);
1624 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1625 switch (alg) {
1626 case WPA_ALG_WEP:
1627 if (key_len == 5)
1628 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1629 0x000FAC01);
1630 else
1631 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1632 0x000FAC05);
1633 break;
1634 case WPA_ALG_TKIP:
1635 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1636 break;
1637 case WPA_ALG_CCMP:
1638 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1639 break;
1640 case WPA_ALG_IGTK:
1641 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1642 break;
1643 default:
1644 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1645 "algorithm %d", __func__, alg);
1646 nlmsg_free(msg);
1647 return -1;
1648 }
1649 }
1650
1651 if (seq)
1652 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1653
1654 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1655 {
1656 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1657 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1658 }
1659 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1660 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1661
1662 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1663 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1664 ret = 0;
1665 if (ret)
1666 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1667 ret, strerror(-ret));
1668
1669 /*
1670 * If we failed or don't need to set the default TX key (below),
1671 * we're done here.
1672 */
1673 if (ret || !set_tx || alg == WPA_ALG_NONE)
1674 return ret;
1675 #ifdef HOSTAPD /* FIX: is this needed? */
1676 if (addr)
1677 return ret;
1678 #endif /* HOSTAPD */
1679
1680 msg = nlmsg_alloc();
1681 if (!msg)
1682 return -ENOMEM;
1683
1684 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1685 0, NL80211_CMD_SET_KEY, 0);
1686 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1687 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1688 if (alg == WPA_ALG_IGTK)
1689 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1690 else
1691 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1692
1693 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1694 if (ret == -ENOENT)
1695 ret = 0;
1696 if (ret)
1697 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1698 "err=%d %s)", ret, strerror(-ret));
1699 return ret;
1700
1701 nla_put_failure:
1702 return -ENOBUFS;
1703 }
1704
1705
1706 #ifndef HOSTAPD
1707
1708 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1709 const u8 *addr, int key_idx,
1710 int set_tx, const u8 *seq,
1711 size_t seq_len,
1712 const u8 *key, size_t key_len)
1713 {
1714 struct wpa_driver_nl80211_data *drv = priv;
1715 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1716 seq_len, key, key_len);
1717 }
1718
1719
1720 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1721 const u8 *addr, int cmd, u16 reason_code)
1722 {
1723 int ret = -1;
1724 struct nl_msg *msg;
1725
1726 msg = nlmsg_alloc();
1727 if (!msg)
1728 return -1;
1729
1730 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1731
1732 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1733 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1734 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1735
1736 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1737 msg = NULL;
1738 if (ret) {
1739 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1740 "(%s)", ret, strerror(-ret));
1741 goto nla_put_failure;
1742 }
1743 ret = 0;
1744
1745 nla_put_failure:
1746 nlmsg_free(msg);
1747 return ret;
1748 }
1749
1750
1751 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1752 int reason_code)
1753 {
1754 struct wpa_driver_nl80211_data *drv = priv;
1755 wpa_printf(MSG_DEBUG, "%s", __func__);
1756 drv->associated = 0;
1757 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1758 reason_code);
1759 }
1760
1761
1762 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1763 int reason_code)
1764 {
1765 struct wpa_driver_nl80211_data *drv = priv;
1766 wpa_printf(MSG_DEBUG, "%s", __func__);
1767 drv->associated = 0;
1768 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1769 reason_code);
1770 }
1771
1772
1773 static int wpa_driver_nl80211_authenticate(
1774 void *priv, struct wpa_driver_auth_params *params)
1775 {
1776 struct wpa_driver_nl80211_data *drv = priv;
1777 int ret = -1, i;
1778 struct nl_msg *msg;
1779 enum nl80211_auth_type type;
1780
1781 drv->associated = 0;
1782
1783 msg = nlmsg_alloc();
1784 if (!msg)
1785 return -1;
1786
1787 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1788 drv->ifindex);
1789
1790 for (i = 0; i < 4; i++) {
1791 if (!params->wep_key[i])
1792 continue;
1793 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1794 i == params->wep_tx_keyidx, NULL, 0,
1795 params->wep_key[i],
1796 params->wep_key_len[i]);
1797 }
1798
1799 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1800 NL80211_CMD_AUTHENTICATE, 0);
1801
1802 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1803 if (params->bssid) {
1804 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1805 MAC2STR(params->bssid));
1806 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1807 }
1808 if (params->freq) {
1809 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1810 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1811 }
1812 if (params->ssid) {
1813 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1814 params->ssid, params->ssid_len);
1815 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1816 params->ssid);
1817 }
1818 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1819 if (params->ie)
1820 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1821 /*
1822 * TODO: if multiple auth_alg options enabled, try them one by one if
1823 * the AP rejects authentication due to unknown auth alg
1824 */
1825 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1826 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1827 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1828 type = NL80211_AUTHTYPE_SHARED_KEY;
1829 else if (params->auth_alg & AUTH_ALG_LEAP)
1830 type = NL80211_AUTHTYPE_NETWORK_EAP;
1831 else if (params->auth_alg & AUTH_ALG_FT)
1832 type = NL80211_AUTHTYPE_FT;
1833 else
1834 goto nla_put_failure;
1835 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1836 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1837
1838 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1839 msg = NULL;
1840 if (ret) {
1841 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1842 "(%s)", ret, strerror(-ret));
1843 goto nla_put_failure;
1844 }
1845 ret = 0;
1846 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1847 "successfully");
1848
1849 nla_put_failure:
1850 nlmsg_free(msg);
1851 return ret;
1852 }
1853
1854 #endif /* HOSTAPD */
1855
1856
1857 #if defined(CONFIG_AP) || defined(HOSTAPD)
1858
1859 struct phy_info_arg {
1860 u16 *num_modes;
1861 struct hostapd_hw_modes *modes;
1862 };
1863
1864 static int phy_info_handler(struct nl_msg *msg, void *arg)
1865 {
1866 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1867 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1868 struct phy_info_arg *phy_info = arg;
1869
1870 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1871
1872 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1873 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1874 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1875 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1876 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1877 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1878 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1879 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1880 };
1881
1882 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1883 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1884 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1885 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1886 };
1887
1888 struct nlattr *nl_band;
1889 struct nlattr *nl_freq;
1890 struct nlattr *nl_rate;
1891 int rem_band, rem_freq, rem_rate;
1892 struct hostapd_hw_modes *mode;
1893 int idx, mode_is_set;
1894
1895 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1896 genlmsg_attrlen(gnlh, 0), NULL);
1897
1898 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1899 return NL_SKIP;
1900
1901 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1902 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1903 if (!mode)
1904 return NL_SKIP;
1905 phy_info->modes = mode;
1906
1907 mode_is_set = 0;
1908
1909 mode = &phy_info->modes[*(phy_info->num_modes)];
1910 memset(mode, 0, sizeof(*mode));
1911 *(phy_info->num_modes) += 1;
1912
1913 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1914 nla_len(nl_band), NULL);
1915
1916 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1917 mode->ht_capab = nla_get_u16(
1918 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1919 }
1920
1921 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1922 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1923 nla_len(nl_freq), freq_policy);
1924 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1925 continue;
1926 mode->num_channels++;
1927 }
1928
1929 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1930 if (!mode->channels)
1931 return NL_SKIP;
1932
1933 idx = 0;
1934
1935 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1936 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1937 nla_len(nl_freq), freq_policy);
1938 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1939 continue;
1940
1941 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1942 mode->channels[idx].flag = 0;
1943
1944 if (!mode_is_set) {
1945 /* crude heuristic */
1946 if (mode->channels[idx].freq < 4000)
1947 mode->mode = HOSTAPD_MODE_IEEE80211B;
1948 else
1949 mode->mode = HOSTAPD_MODE_IEEE80211A;
1950 mode_is_set = 1;
1951 }
1952
1953 /* crude heuristic */
1954 if (mode->channels[idx].freq < 4000)
1955 if (mode->channels[idx].freq == 2484)
1956 mode->channels[idx].chan = 14;
1957 else
1958 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1959 else
1960 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1961
1962 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1963 mode->channels[idx].flag |=
1964 HOSTAPD_CHAN_DISABLED;
1965 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1966 mode->channels[idx].flag |=
1967 HOSTAPD_CHAN_PASSIVE_SCAN;
1968 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1969 mode->channels[idx].flag |=
1970 HOSTAPD_CHAN_NO_IBSS;
1971 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1972 mode->channels[idx].flag |=
1973 HOSTAPD_CHAN_RADAR;
1974
1975 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1976 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1977 mode->channels[idx].max_tx_power =
1978 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1979
1980 idx++;
1981 }
1982
1983 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1984 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1985 nla_len(nl_rate), rate_policy);
1986 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1987 continue;
1988 mode->num_rates++;
1989 }
1990
1991 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1992 if (!mode->rates)
1993 return NL_SKIP;
1994
1995 idx = 0;
1996
1997 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1998 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1999 nla_len(nl_rate), rate_policy);
2000 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2001 continue;
2002 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2003
2004 /* crude heuristic */
2005 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2006 mode->rates[idx].rate > 200)
2007 mode->mode = HOSTAPD_MODE_IEEE80211G;
2008
2009 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2010 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2011
2012 idx++;
2013 }
2014 }
2015
2016 return NL_SKIP;
2017 }
2018
2019 static struct hostapd_hw_modes *
2020 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2021 {
2022 u16 m;
2023 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2024 int i, mode11g_idx = -1;
2025
2026 /* If only 802.11g mode is included, use it to construct matching
2027 * 802.11b mode data. */
2028
2029 for (m = 0; m < *num_modes; m++) {
2030 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2031 return modes; /* 802.11b already included */
2032 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2033 mode11g_idx = m;
2034 }
2035
2036 if (mode11g_idx < 0)
2037 return modes; /* 2.4 GHz band not supported at all */
2038
2039 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2040 if (nmodes == NULL)
2041 return modes; /* Could not add 802.11b mode */
2042
2043 mode = &nmodes[*num_modes];
2044 os_memset(mode, 0, sizeof(*mode));
2045 (*num_modes)++;
2046 modes = nmodes;
2047
2048 mode->mode = HOSTAPD_MODE_IEEE80211B;
2049
2050 mode11g = &modes[mode11g_idx];
2051 mode->num_channels = mode11g->num_channels;
2052 mode->channels = os_malloc(mode11g->num_channels *
2053 sizeof(struct hostapd_channel_data));
2054 if (mode->channels == NULL) {
2055 (*num_modes)--;
2056 return modes; /* Could not add 802.11b mode */
2057 }
2058 os_memcpy(mode->channels, mode11g->channels,
2059 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2060
2061 mode->num_rates = 0;
2062 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2063 if (mode->rates == NULL) {
2064 os_free(mode->channels);
2065 (*num_modes)--;
2066 return modes; /* Could not add 802.11b mode */
2067 }
2068
2069 for (i = 0; i < mode11g->num_rates; i++) {
2070 if (mode11g->rates[i].rate > 110 ||
2071 mode11g->rates[i].flags &
2072 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2073 continue;
2074 mode->rates[mode->num_rates] = mode11g->rates[i];
2075 mode->num_rates++;
2076 if (mode->num_rates == 4)
2077 break;
2078 }
2079
2080 if (mode->num_rates == 0) {
2081 os_free(mode->channels);
2082 os_free(mode->rates);
2083 (*num_modes)--;
2084 return modes; /* No 802.11b rates */
2085 }
2086
2087 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2088 "information");
2089
2090 return modes;
2091 }
2092
2093
2094 static struct hostapd_hw_modes *
2095 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2096 {
2097 struct wpa_driver_nl80211_data *drv = priv;
2098 struct nl_msg *msg;
2099 struct phy_info_arg result = {
2100 .num_modes = num_modes,
2101 .modes = NULL,
2102 };
2103
2104 *num_modes = 0;
2105 *flags = 0;
2106
2107 msg = nlmsg_alloc();
2108 if (!msg)
2109 return NULL;
2110
2111 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2112 0, NL80211_CMD_GET_WIPHY, 0);
2113
2114 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2115
2116 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2117 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2118 nla_put_failure:
2119 return NULL;
2120 }
2121
2122
2123 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2124 const void *data, size_t len,
2125 int encrypt)
2126 {
2127 __u8 rtap_hdr[] = {
2128 0x00, 0x00, /* radiotap version */
2129 0x0e, 0x00, /* radiotap length */
2130 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2131 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2132 0x00, /* padding */
2133 0x00, 0x00, /* RX and TX flags to indicate that */
2134 0x00, 0x00, /* this is the injected frame directly */
2135 };
2136 struct iovec iov[2] = {
2137 {
2138 .iov_base = &rtap_hdr,
2139 .iov_len = sizeof(rtap_hdr),
2140 },
2141 {
2142 .iov_base = (void *) data,
2143 .iov_len = len,
2144 }
2145 };
2146 struct msghdr msg = {
2147 .msg_name = NULL,
2148 .msg_namelen = 0,
2149 .msg_iov = iov,
2150 .msg_iovlen = 2,
2151 .msg_control = NULL,
2152 .msg_controllen = 0,
2153 .msg_flags = 0,
2154 };
2155
2156 if (encrypt)
2157 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2158
2159 return sendmsg(drv->monitor_sock, &msg, 0);
2160 }
2161
2162
2163 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2164 size_t data_len)
2165 {
2166 struct wpa_driver_nl80211_data *drv = priv;
2167 struct ieee80211_mgmt *mgmt;
2168 int do_not_encrypt = 0;
2169 u16 fc;
2170
2171 mgmt = (struct ieee80211_mgmt *) data;
2172 fc = le_to_host16(mgmt->frame_control);
2173
2174 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2175 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2176 /*
2177 * Only one of the authentication frame types is encrypted.
2178 * In order for static WEP encryption to work properly (i.e.,
2179 * to not encrypt the frame), we need to tell mac80211 about
2180 * the frames that must not be encrypted.
2181 */
2182 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2183 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2184 if (auth_alg == WLAN_AUTH_OPEN ||
2185 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2186 do_not_encrypt = 1;
2187 }
2188
2189 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2190 !do_not_encrypt);
2191 }
2192
2193
2194 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2195 const u8 *head, size_t head_len,
2196 const u8 *tail, size_t tail_len,
2197 int dtim_period)
2198 {
2199 struct wpa_driver_nl80211_data *drv = priv;
2200 struct nl_msg *msg;
2201 u8 cmd = NL80211_CMD_NEW_BEACON;
2202 int ret;
2203 int beacon_set;
2204 #ifdef HOSTAPD
2205 struct i802_bss *bss;
2206
2207 bss = get_bss(drv, ifindex);
2208 if (bss == NULL)
2209 return -ENOENT;
2210 beacon_set = bss->beacon_set;
2211 #else /* HOSTAPD */
2212 beacon_set = drv->beacon_set;
2213 #endif /* HOSTAPD */
2214
2215 msg = nlmsg_alloc();
2216 if (!msg)
2217 return -ENOMEM;
2218
2219 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2220 beacon_set);
2221 if (beacon_set)
2222 cmd = NL80211_CMD_SET_BEACON;
2223
2224 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2225 0, cmd, 0);
2226 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2227 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2228 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2229 if (!drv->beacon_int)
2230 drv->beacon_int = 100;
2231 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2232 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2233
2234 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2235 if (ret) {
2236 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2237 ret, strerror(-ret));
2238 } else {
2239 #ifdef HOSTAPD
2240 bss->beacon_set = 1;
2241 #else /* HOSTAPD */
2242 drv->beacon_set = 1;
2243 #endif /* HOSTAPD */
2244 }
2245 return ret;
2246 nla_put_failure:
2247 return -ENOBUFS;
2248 }
2249
2250
2251 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2252 {
2253 struct wpa_driver_nl80211_data *drv = priv;
2254 struct nl_msg *msg;
2255
2256 drv->beacon_int = value;
2257
2258 #ifdef HOSTAPD
2259 if (!drv->bss.beacon_set)
2260 return 0;
2261 #else /* HOSTAPD */
2262 if (!drv->beacon_set)
2263 return 0;
2264 #endif /* HOSTAPD */
2265
2266 msg = nlmsg_alloc();
2267 if (!msg)
2268 return -ENOMEM;
2269
2270 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2271 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2272 0, NL80211_CMD_SET_BEACON, 0);
2273 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2274
2275 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2276
2277 return send_and_recv_msgs(drv, msg, NULL, NULL);
2278 nla_put_failure:
2279 return -ENOBUFS;
2280 }
2281
2282
2283 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2284 int freq, int ht_enabled,
2285 int sec_channel_offset)
2286 {
2287 struct nl_msg *msg;
2288 int ret;
2289
2290 msg = nlmsg_alloc();
2291 if (!msg)
2292 return -1;
2293
2294 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2295 NL80211_CMD_SET_WIPHY, 0);
2296
2297 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2298 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2299 if (ht_enabled) {
2300 switch (sec_channel_offset) {
2301 case -1:
2302 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2303 NL80211_CHAN_HT40MINUS);
2304 break;
2305 case 1:
2306 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2307 NL80211_CHAN_HT40PLUS);
2308 break;
2309 default:
2310 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2311 NL80211_CHAN_HT20);
2312 break;
2313 }
2314 }
2315
2316 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2317 if (ret == 0)
2318 return 0;
2319 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2320 "%d (%s)", freq, ret, strerror(-ret));
2321 nla_put_failure:
2322 return -1;
2323 }
2324
2325
2326 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2327 struct hostapd_sta_add_params *params)
2328 {
2329 struct wpa_driver_nl80211_data *drv = priv;
2330 struct nl_msg *msg;
2331 int ret = -ENOBUFS;
2332
2333 msg = nlmsg_alloc();
2334 if (!msg)
2335 return -ENOMEM;
2336
2337 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2338 0, NL80211_CMD_NEW_STATION, 0);
2339
2340 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2341 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2342 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2343 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2344 params->supp_rates);
2345 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2346 params->listen_interval);
2347
2348 #ifdef CONFIG_IEEE80211N
2349 if (params->ht_capabilities) {
2350 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2351 params->ht_capabilities->length,
2352 &params->ht_capabilities->data);
2353 }
2354 #endif /* CONFIG_IEEE80211N */
2355
2356 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2357 if (ret)
2358 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2359 "result: %d (%s)", ret, strerror(-ret));
2360 if (ret == -EEXIST)
2361 ret = 0;
2362 nla_put_failure:
2363 return ret;
2364 }
2365
2366
2367 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2368 {
2369 struct wpa_driver_nl80211_data *drv = priv;
2370 struct nl_msg *msg;
2371 int ret;
2372
2373 msg = nlmsg_alloc();
2374 if (!msg)
2375 return -ENOMEM;
2376
2377 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2378 0, NL80211_CMD_DEL_STATION, 0);
2379
2380 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2381 if_nametoindex(drv->ifname));
2382 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2383
2384 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2385 if (ret == -ENOENT)
2386 return 0;
2387 return ret;
2388 nla_put_failure:
2389 return -ENOBUFS;
2390 }
2391
2392 #endif /* CONFIG_AP || HOSTAPD */
2393
2394
2395 #ifdef CONFIG_AP
2396
2397 static int wpa_driver_nl80211_set_beacon(void *priv,
2398 const u8 *head, size_t head_len,
2399 const u8 *tail, size_t tail_len,
2400 int dtim_period)
2401 {
2402 struct wpa_driver_nl80211_data *drv = priv;
2403 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2404 head, head_len,
2405 tail, tail_len,
2406 dtim_period);
2407 }
2408
2409 #endif /* CONFIG_AP */
2410
2411 #if defined(CONFIG_AP) || defined(HOSTAPD)
2412
2413 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2414 int ifidx)
2415 {
2416 struct nl_msg *msg;
2417
2418 #ifdef HOSTAPD
2419 /* stop listening for EAPOL on this interface */
2420 del_ifidx(drv, ifidx);
2421 #endif /* HOSTAPD */
2422
2423 msg = nlmsg_alloc();
2424 if (!msg)
2425 goto nla_put_failure;
2426
2427 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2428 0, NL80211_CMD_DEL_INTERFACE, 0);
2429 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2430
2431 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2432 return;
2433 nla_put_failure:
2434 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2435 ifidx);
2436 }
2437
2438
2439 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2440 const char *ifname, enum nl80211_iftype iftype,
2441 const u8 *addr)
2442 {
2443 struct nl_msg *msg, *flags = NULL;
2444 int ifidx;
2445 int ret = -ENOBUFS;
2446
2447 msg = nlmsg_alloc();
2448 if (!msg)
2449 return -1;
2450
2451 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2452 0, NL80211_CMD_NEW_INTERFACE, 0);
2453 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2454 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2455 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2456
2457 if (iftype == NL80211_IFTYPE_MONITOR) {
2458 int err;
2459
2460 flags = nlmsg_alloc();
2461 if (!flags)
2462 goto nla_put_failure;
2463
2464 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2465
2466 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2467
2468 nlmsg_free(flags);
2469
2470 if (err)
2471 goto nla_put_failure;
2472 }
2473
2474 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2475 if (ret) {
2476 nla_put_failure:
2477 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2478 ifname);
2479 return ret;
2480 }
2481
2482 ifidx = if_nametoindex(ifname);
2483
2484 if (ifidx <= 0)
2485 return -1;
2486
2487 #ifdef HOSTAPD
2488 /* start listening for EAPOL on this interface */
2489 add_ifidx(drv, ifidx);
2490
2491 if (addr && iftype == NL80211_IFTYPE_AP &&
2492 set_ifhwaddr(drv, ifname, addr)) {
2493 nl80211_remove_iface(drv, ifidx);
2494 return -1;
2495 }
2496 #endif /* HOSTAPD */
2497
2498 return ifidx;
2499 }
2500
2501 #endif /* CONFIG_AP || HOSTAPD */
2502
2503 #ifdef CONFIG_AP
2504
2505 void ap_tx_status(void *ctx, const u8 *addr,
2506 const u8 *buf, size_t len, int ack);
2507 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2508 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2509 struct hostapd_frame_info *fi);
2510 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2511
2512 #endif /* CONFIG_AP */
2513
2514 #if defined(CONFIG_AP) || defined(HOSTAPD)
2515
2516 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2517 {
2518 struct ieee80211_hdr *hdr;
2519 u16 fc, type, stype;
2520
2521 hdr = (struct ieee80211_hdr *) buf;
2522 fc = le_to_host16(hdr->frame_control);
2523
2524 type = WLAN_FC_GET_TYPE(fc);
2525 stype = WLAN_FC_GET_STYPE(fc);
2526
2527 switch (type) {
2528 case WLAN_FC_TYPE_MGMT:
2529 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2530 ok ? "ACK" : "fail");
2531 #ifdef HOSTAPD
2532 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2533 #else /* HOSTAPD */
2534 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2535 #endif /* HOSTAPD */
2536 break;
2537 case WLAN_FC_TYPE_CTRL:
2538 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2539 ok ? "ACK" : "fail");
2540 break;
2541 case WLAN_FC_TYPE_DATA:
2542 #ifdef HOSTAPD
2543 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2544 #else /* HOSTAPD */
2545 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2546 #endif /* HOSTAPD */
2547 break;
2548 default:
2549 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2550 type);
2551 break;
2552 }
2553 }
2554
2555
2556 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2557 struct ieee80211_hdr *hdr, size_t len)
2558 {
2559 #ifdef HOSTAPD
2560 hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2561 #else /* HOSTAPD */
2562 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2563 #endif /* HOSTAPD */
2564 }
2565
2566
2567 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2568 u8 *buf, size_t len,
2569 struct hostapd_frame_info *hfi)
2570 {
2571 struct ieee80211_hdr *hdr;
2572 u16 fc, stype;
2573
2574 hdr = (struct ieee80211_hdr *) buf;
2575 fc = le_to_host16(hdr->frame_control);
2576 stype = WLAN_FC_GET_STYPE(fc);
2577
2578 switch (WLAN_FC_GET_TYPE(fc)) {
2579 case WLAN_FC_TYPE_MGMT:
2580 if (stype != WLAN_FC_STYPE_BEACON &&
2581 stype != WLAN_FC_STYPE_PROBE_REQ)
2582 wpa_printf(MSG_MSGDUMP, "MGMT");
2583 #ifdef HOSTAPD
2584 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2585 #else /* HOSTAPD */
2586 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2587 #endif /* HOSTAPD */
2588 break;
2589 case WLAN_FC_TYPE_CTRL:
2590 /* can only get here with PS-Poll frames */
2591 wpa_printf(MSG_DEBUG, "CTRL");
2592 from_unknown_sta(drv, hdr, len);
2593 break;
2594 case WLAN_FC_TYPE_DATA:
2595 from_unknown_sta(drv, hdr, len);
2596 break;
2597 }
2598 }
2599
2600
2601 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2602 {
2603 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2604 int len;
2605 unsigned char buf[3000];
2606 struct ieee80211_radiotap_iterator iter;
2607 int ret;
2608 struct hostapd_frame_info hfi;
2609 int injected = 0, failed = 0, rxflags = 0;
2610
2611 len = recv(sock, buf, sizeof(buf), 0);
2612 if (len < 0) {
2613 perror("recv");
2614 return;
2615 }
2616
2617 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2618 printf("received invalid radiotap frame\n");
2619 return;
2620 }
2621
2622 memset(&hfi, 0, sizeof(hfi));
2623
2624 while (1) {
2625 ret = ieee80211_radiotap_iterator_next(&iter);
2626 if (ret == -ENOENT)
2627 break;
2628 if (ret) {
2629 printf("received invalid radiotap frame (%d)\n", ret);
2630 return;
2631 }
2632 switch (iter.this_arg_index) {
2633 case IEEE80211_RADIOTAP_FLAGS:
2634 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2635 len -= 4;
2636 break;
2637 case IEEE80211_RADIOTAP_RX_FLAGS:
2638 rxflags = 1;
2639 break;
2640 case IEEE80211_RADIOTAP_TX_FLAGS:
2641 injected = 1;
2642 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2643 IEEE80211_RADIOTAP_F_TX_FAIL;
2644 break;
2645 case IEEE80211_RADIOTAP_DATA_RETRIES:
2646 break;
2647 case IEEE80211_RADIOTAP_CHANNEL:
2648 /* TODO convert from freq/flags to channel number
2649 hfi.channel = XXX;
2650 hfi.phytype = XXX;
2651 */
2652 break;
2653 case IEEE80211_RADIOTAP_RATE:
2654 hfi.datarate = *iter.this_arg * 5;
2655 break;
2656 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2657 hfi.ssi_signal = *iter.this_arg;
2658 break;
2659 }
2660 }
2661
2662 if (rxflags && injected)
2663 return;
2664
2665 if (!injected)
2666 handle_frame(drv, buf + iter.max_length,
2667 len - iter.max_length, &hfi);
2668 else
2669 handle_tx_callback(drv->ctx, buf + iter.max_length,
2670 len - iter.max_length, !failed);
2671 }
2672
2673
2674 /*
2675 * we post-process the filter code later and rewrite
2676 * this to the offset to the last instruction
2677 */
2678 #define PASS 0xFF
2679 #define FAIL 0xFE
2680
2681 static struct sock_filter msock_filter_insns[] = {
2682 /*
2683 * do a little-endian load of the radiotap length field
2684 */
2685 /* load lower byte into A */
2686 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2687 /* put it into X (== index register) */
2688 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2689 /* load upper byte into A */
2690 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2691 /* left-shift it by 8 */
2692 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2693 /* or with X */
2694 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2695 /* put result into X */
2696 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2697
2698 /*
2699 * Allow management frames through, this also gives us those
2700 * management frames that we sent ourselves with status
2701 */
2702 /* load the lower byte of the IEEE 802.11 frame control field */
2703 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2704 /* mask off frame type and version */
2705 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2706 /* accept frame if it's both 0, fall through otherwise */
2707 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2708
2709 /*
2710 * TODO: add a bit to radiotap RX flags that indicates
2711 * that the sending station is not associated, then
2712 * add a filter here that filters on our DA and that flag
2713 * to allow us to deauth frames to that bad station.
2714 *
2715 * Not a regression -- we didn't do it before either.
2716 */
2717
2718 #if 0
2719 /*
2720 * drop non-data frames, WDS frames
2721 */
2722 /* load the lower byte of the frame control field */
2723 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2724 /* mask off QoS bit */
2725 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2726 /* drop non-data frames */
2727 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2728 /* load the upper byte of the frame control field */
2729 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2730 /* mask off toDS/fromDS */
2731 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2732 /* drop WDS frames */
2733 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2734 #endif
2735
2736 /*
2737 * add header length to index
2738 */
2739 /* load the lower byte of the frame control field */
2740 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2741 /* mask off QoS bit */
2742 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2743 /* right shift it by 6 to give 0 or 2 */
2744 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2745 /* add data frame header length */
2746 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2747 /* add index, was start of 802.11 header */
2748 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2749 /* move to index, now start of LL header */
2750 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2751
2752 /*
2753 * Accept empty data frames, we use those for
2754 * polling activity.
2755 */
2756 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2757 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2758
2759 /*
2760 * Accept EAPOL frames
2761 */
2762 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2763 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2764 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2765 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2766
2767 /* keep these last two statements or change the code below */
2768 /* return 0 == "DROP" */
2769 BPF_STMT(BPF_RET | BPF_K, 0),
2770 /* return ~0 == "keep all" */
2771 BPF_STMT(BPF_RET | BPF_K, ~0),
2772 };
2773
2774 static struct sock_fprog msock_filter = {
2775 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2776 .filter = msock_filter_insns,
2777 };
2778
2779
2780 static int add_monitor_filter(int s)
2781 {
2782 int idx;
2783
2784 /* rewrite all PASS/FAIL jump offsets */
2785 for (idx = 0; idx < msock_filter.len; idx++) {
2786 struct sock_filter *insn = &msock_filter_insns[idx];
2787
2788 if (BPF_CLASS(insn->code) == BPF_JMP) {
2789 if (insn->code == (BPF_JMP|BPF_JA)) {
2790 if (insn->k == PASS)
2791 insn->k = msock_filter.len - idx - 2;
2792 else if (insn->k == FAIL)
2793 insn->k = msock_filter.len - idx - 3;
2794 }
2795
2796 if (insn->jt == PASS)
2797 insn->jt = msock_filter.len - idx - 2;
2798 else if (insn->jt == FAIL)
2799 insn->jt = msock_filter.len - idx - 3;
2800
2801 if (insn->jf == PASS)
2802 insn->jf = msock_filter.len - idx - 2;
2803 else if (insn->jf == FAIL)
2804 insn->jf = msock_filter.len - idx - 3;
2805 }
2806 }
2807
2808 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2809 &msock_filter, sizeof(msock_filter))) {
2810 perror("SO_ATTACH_FILTER");
2811 return -1;
2812 }
2813
2814 return 0;
2815 }
2816
2817
2818 static void nl80211_remove_monitor_interface(
2819 struct wpa_driver_nl80211_data *drv)
2820 {
2821 if (drv->monitor_ifidx >= 0) {
2822 nl80211_remove_iface(drv, drv->monitor_ifidx);
2823 drv->monitor_ifidx = -1;
2824 }
2825 }
2826
2827
2828 static int
2829 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2830 {
2831 char buf[IFNAMSIZ];
2832 struct sockaddr_ll ll;
2833 int optval;
2834 socklen_t optlen;
2835
2836 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2837 buf[IFNAMSIZ - 1] = '\0';
2838
2839 drv->monitor_ifidx =
2840 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2841
2842 if (drv->monitor_ifidx < 0)
2843 return -1;
2844
2845 if (hostapd_set_iface_flags(drv, buf, 1))
2846 goto error;
2847
2848 memset(&ll, 0, sizeof(ll));
2849 ll.sll_family = AF_PACKET;
2850 ll.sll_ifindex = drv->monitor_ifidx;
2851 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2852 if (drv->monitor_sock < 0) {
2853 perror("socket[PF_PACKET,SOCK_RAW]");
2854 goto error;
2855 }
2856
2857 if (add_monitor_filter(drv->monitor_sock)) {
2858 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2859 "interface; do filtering in user space");
2860 /* This works, but will cost in performance. */
2861 }
2862
2863 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2864 perror("monitor socket bind");
2865 goto error;
2866 }
2867
2868 optlen = sizeof(optval);
2869 optval = 20;
2870 if (setsockopt
2871 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2872 perror("Failed to set socket priority");
2873 goto error;
2874 }
2875
2876 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2877 drv, NULL)) {
2878 printf("Could not register monitor read socket\n");
2879 goto error;
2880 }
2881
2882 return 0;
2883 error:
2884 nl80211_remove_monitor_interface(drv);
2885 return -1;
2886 }
2887
2888
2889 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2890
2891 static int wpa_driver_nl80211_hapd_send_eapol(
2892 void *priv, const u8 *addr, const u8 *data,
2893 size_t data_len, int encrypt, const u8 *own_addr)
2894 {
2895 struct wpa_driver_nl80211_data *drv = priv;
2896 struct ieee80211_hdr *hdr;
2897 size_t len;
2898 u8 *pos;
2899 int res;
2900 #if 0 /* FIX */
2901 int qos = sta->flags & WLAN_STA_WME;
2902 #else
2903 int qos = 0;
2904 #endif
2905
2906 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
2907 data_len;
2908 hdr = os_zalloc(len);
2909 if (hdr == NULL) {
2910 printf("malloc() failed for i802_send_data(len=%lu)\n",
2911 (unsigned long) len);
2912 return -1;
2913 }
2914
2915 hdr->frame_control =
2916 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
2917 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
2918 if (encrypt)
2919 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
2920 #if 0 /* To be enabled if qos determination is added above */
2921 if (qos) {
2922 hdr->frame_control |=
2923 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
2924 }
2925 #endif
2926
2927 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
2928 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
2929 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
2930 pos = (u8 *) (hdr + 1);
2931
2932 #if 0 /* To be enabled if qos determination is added above */
2933 if (qos) {
2934 /* add an empty QoS header if needed */
2935 pos[0] = 0;
2936 pos[1] = 0;
2937 pos += 2;
2938 }
2939 #endif
2940
2941 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
2942 pos += sizeof(rfc1042_header);
2943 WPA_PUT_BE16(pos, ETH_P_PAE);
2944 pos += 2;
2945 memcpy(pos, data, data_len);
2946
2947 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
2948 if (res < 0) {
2949 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
2950 "failed: %d (%s)",
2951 (unsigned long) len, errno, strerror(errno));
2952 }
2953 free(hdr);
2954
2955 return res;
2956 }
2957
2958
2959 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
2960 int total_flags, int flags_or,
2961 int flags_and)
2962 {
2963 struct wpa_driver_nl80211_data *drv = priv;
2964 struct nl_msg *msg, *flags = NULL;
2965
2966 msg = nlmsg_alloc();
2967 if (!msg)
2968 return -ENOMEM;
2969
2970 flags = nlmsg_alloc();
2971 if (!flags) {
2972 nlmsg_free(msg);
2973 return -ENOMEM;
2974 }
2975
2976 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2977 0, NL80211_CMD_SET_STATION, 0);
2978
2979 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2980 if_nametoindex(drv->ifname));
2981 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2982
2983 if (total_flags & WLAN_STA_AUTHORIZED)
2984 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
2985
2986 if (total_flags & WLAN_STA_WMM)
2987 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
2988
2989 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
2990 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
2991
2992 if (total_flags & WLAN_STA_MFP)
2993 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
2994
2995 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
2996 goto nla_put_failure;
2997
2998 nlmsg_free(flags);
2999
3000 return send_and_recv_msgs(drv, msg, NULL, NULL);
3001 nla_put_failure:
3002 nlmsg_free(flags);
3003 return -ENOBUFS;
3004 }
3005
3006 #endif /* CONFIG_AP || HOSTAPD */
3007
3008 #ifdef CONFIG_AP
3009
3010 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3011 struct wpa_driver_associate_params *params)
3012 {
3013 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3014 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3015 nl80211_remove_monitor_interface(drv);
3016 return -1;
3017 }
3018
3019 /* TODO: setup monitor interface (and add code somewhere to remove this
3020 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3021
3022 return 0;
3023 }
3024 #endif /* CONFIG_AP */
3025
3026
3027 #ifndef HOSTAPD
3028 static int wpa_driver_nl80211_associate(
3029 void *priv, struct wpa_driver_associate_params *params)
3030 {
3031 struct wpa_driver_nl80211_data *drv = priv;
3032 int ret = -1;
3033 struct nl_msg *msg;
3034
3035 #ifdef CONFIG_AP
3036 if (params->mode == 2)
3037 return wpa_driver_nl80211_ap(drv, params);
3038 #endif /* CONFIG_AP */
3039
3040 #ifndef NO_WEXT
3041 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
3042 params->drop_unencrypted);
3043 #endif /* NO_WEXT */
3044
3045 drv->associated = 0;
3046
3047 msg = nlmsg_alloc();
3048 if (!msg)
3049 return -1;
3050
3051 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3052 drv->ifindex);
3053 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3054 NL80211_CMD_ASSOCIATE, 0);
3055
3056 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3057 if (params->bssid) {
3058 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3059 MAC2STR(params->bssid));
3060 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3061 }
3062 if (params->freq) {
3063 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3064 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3065 }
3066 if (params->ssid) {
3067 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3068 params->ssid, params->ssid_len);
3069 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3070 params->ssid);
3071 if (params->ssid_len > sizeof(drv->ssid))
3072 goto nla_put_failure;
3073 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3074 drv->ssid_len = params->ssid_len;
3075 }
3076 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3077 if (params->wpa_ie)
3078 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3079 params->wpa_ie);
3080
3081 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3082 msg = NULL;
3083 if (ret) {
3084 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3085 "(%s)", ret, strerror(-ret));
3086 goto nla_put_failure;
3087 }
3088 ret = 0;
3089 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3090 "successfully");
3091
3092 nla_put_failure:
3093 nlmsg_free(msg);
3094 return ret;
3095 }
3096 #endif /* HOSTAPD */
3097
3098
3099 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3100 int ifindex, int mode)
3101 {
3102 struct nl_msg *msg;
3103 int ret = -ENOBUFS;
3104
3105 msg = nlmsg_alloc();
3106 if (!msg)
3107 return -ENOMEM;
3108
3109 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3110 0, NL80211_CMD_SET_INTERFACE, 0);
3111 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3112 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3113
3114 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3115 if (!ret)
3116 return 0;
3117 nla_put_failure:
3118 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3119 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3120 return ret;
3121 }
3122
3123
3124 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3125 {
3126 struct wpa_driver_nl80211_data *drv = priv;
3127 int ret = -1;
3128 int nlmode;
3129
3130 switch (mode) {
3131 case 0:
3132 nlmode = NL80211_IFTYPE_STATION;
3133 break;
3134 case 1:
3135 nlmode = NL80211_IFTYPE_ADHOC;
3136 break;
3137 case 2:
3138 nlmode = NL80211_IFTYPE_AP;
3139 break;
3140 default:
3141 return -1;
3142 }
3143
3144 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3145 drv->nlmode = nlmode;
3146 ret = 0;
3147 goto done;
3148 }
3149
3150 if (nlmode == drv->nlmode) {
3151 ret = 0;
3152 goto done; /* Already in the requested mode */
3153 }
3154
3155 /* mac80211 doesn't allow mode changes while the device is up, so
3156 * take the device down, try to set the mode again, and bring the
3157 * device back up.
3158 */
3159 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3160 /* Try to set the mode again while the interface is down */
3161 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3162 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3163 ret = -1;
3164 }
3165
3166 if (!ret)
3167 drv->nlmode = nlmode;
3168
3169 done:
3170 #if defined(CONFIG_AP) || defined(HOSTAPD)
3171 if (!ret && nlmode == NL80211_IFTYPE_AP) {
3172 /* Setup additional AP mode functionality if needed */
3173 if (drv->monitor_ifidx < 0 &&
3174 nl80211_create_monitor_interface(drv))
3175 return -1;
3176 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3177 /* Remove additional AP mode functionality */
3178 nl80211_remove_monitor_interface(drv);
3179 }
3180 #endif /* CONFIG_AP || HOSTAPD */
3181
3182 return ret;
3183 }
3184
3185
3186 #ifndef HOSTAPD
3187
3188 static int wpa_driver_nl80211_get_capa(void *priv,
3189 struct wpa_driver_capa *capa)
3190 {
3191 struct wpa_driver_nl80211_data *drv = priv;
3192 if (!drv->has_capability)
3193 return -1;
3194 os_memcpy(capa, &drv->capa, sizeof(*capa));
3195 return 0;
3196 }
3197
3198
3199 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3200 {
3201 struct wpa_driver_nl80211_data *drv = priv;
3202
3203 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3204 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3205 drv->operstate = state;
3206 return wpa_driver_nl80211_send_oper_ifla(
3207 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3208 }
3209
3210 #endif /* HOSTAPD */
3211
3212
3213 #ifdef HOSTAPD
3214
3215 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3216 int ifindex)
3217 {
3218 struct i802_bss *bss = &drv->bss;
3219 while (bss) {
3220 if (ifindex == bss->ifindex)
3221 return bss;
3222 bss = bss->next;
3223 }
3224 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3225 return NULL;
3226 }
3227
3228
3229 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3230 {
3231 int i;
3232 int *old;
3233
3234 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3235 ifidx);
3236 for (i = 0; i < drv->num_if_indices; i++) {
3237 if (drv->if_indices[i] == 0) {
3238 drv->if_indices[i] = ifidx;
3239 return;
3240 }
3241 }
3242
3243 if (drv->if_indices != drv->default_if_indices)
3244 old = drv->if_indices;
3245 else
3246 old = NULL;
3247
3248 drv->if_indices = realloc(old,
3249 sizeof(int) * (drv->num_if_indices + 1));
3250 if (!drv->if_indices) {
3251 if (!old)
3252 drv->if_indices = drv->default_if_indices;
3253 else
3254 drv->if_indices = old;
3255 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3256 "interfaces");
3257 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3258 return;
3259 }
3260 drv->if_indices[drv->num_if_indices] = ifidx;
3261 drv->num_if_indices++;
3262 }
3263
3264
3265 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3266 {
3267 int i;
3268
3269 for (i = 0; i < drv->num_if_indices; i++) {
3270 if (drv->if_indices[i] == ifidx) {
3271 drv->if_indices[i] = 0;
3272 break;
3273 }
3274 }
3275 }
3276
3277
3278 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3279 {
3280 int i;
3281
3282 for (i = 0; i < drv->num_if_indices; i++)
3283 if (drv->if_indices[i] == ifidx)
3284 return 1;
3285
3286 return 0;
3287 }
3288
3289
3290 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3291 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3292 size_t seq_len, const u8 *key, size_t key_len)
3293 {
3294 struct wpa_driver_nl80211_data *drv = priv;
3295 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3296 set_tx, seq, seq_len, key, key_len);
3297 }
3298
3299
3300 static inline int min_int(int a, int b)
3301 {
3302 if (a < b)
3303 return a;
3304 return b;
3305 }
3306
3307
3308 static int get_key_handler(struct nl_msg *msg, void *arg)
3309 {
3310 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3311 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3312
3313 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3314 genlmsg_attrlen(gnlh, 0), NULL);
3315
3316 /*
3317 * TODO: validate the key index and mac address!
3318 * Otherwise, there's a race condition as soon as
3319 * the kernel starts sending key notifications.
3320 */
3321
3322 if (tb[NL80211_ATTR_KEY_SEQ])
3323 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3324 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3325 return NL_SKIP;
3326 }
3327
3328
3329 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3330 int idx, u8 *seq)
3331 {
3332 struct wpa_driver_nl80211_data *drv = priv;
3333 struct nl_msg *msg;
3334
3335 msg = nlmsg_alloc();
3336 if (!msg)
3337 return -ENOMEM;
3338
3339 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3340 0, NL80211_CMD_GET_KEY, 0);
3341
3342 if (addr)
3343 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3344 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3345 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3346
3347 memset(seq, 0, 6);
3348
3349 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3350 nla_put_failure:
3351 return -ENOBUFS;
3352 }
3353
3354
3355 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3356 int mode)
3357 {
3358 struct wpa_driver_nl80211_data *drv = priv;
3359 struct nl_msg *msg;
3360 u8 rates[NL80211_MAX_SUPP_RATES];
3361 u8 rates_len = 0;
3362 int i;
3363
3364 msg = nlmsg_alloc();
3365 if (!msg)
3366 return -ENOMEM;
3367
3368 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3369 NL80211_CMD_SET_BSS, 0);
3370
3371 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3372 rates[rates_len++] = basic_rates[i] / 5;
3373
3374 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3375
3376 /* TODO: multi-BSS support */
3377 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3378
3379 return send_and_recv_msgs(drv, msg, NULL, NULL);
3380 nla_put_failure:
3381 return -ENOBUFS;
3382 }
3383
3384
3385 /* Set kernel driver on given frequency (MHz) */
3386 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3387 {
3388 struct wpa_driver_nl80211_data *drv = priv;
3389 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3390 freq->sec_channel_offset);
3391 }
3392
3393
3394 static int i802_set_rts(void *priv, int rts)
3395 {
3396 #ifdef NO_WEXT
3397 return -1;
3398 #else /* NO_WEXT */
3399 struct wpa_driver_nl80211_data *drv = priv;
3400 struct iwreq iwr;
3401
3402 memset(&iwr, 0, sizeof(iwr));
3403 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3404 iwr.u.rts.value = rts;
3405 iwr.u.rts.fixed = 1;
3406
3407 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3408 perror("ioctl[SIOCSIWRTS]");
3409 return -1;
3410 }
3411
3412 return 0;
3413 #endif /* NO_WEXT */
3414 }
3415
3416
3417 static int i802_set_frag(void *priv, int frag)
3418 {
3419 #ifdef NO_WEXT
3420 return -1;
3421 #else /* NO_WEXT */
3422 struct wpa_driver_nl80211_data *drv = priv;
3423 struct iwreq iwr;
3424
3425 memset(&iwr, 0, sizeof(iwr));
3426 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3427 iwr.u.frag.value = frag;
3428 iwr.u.frag.fixed = 1;
3429
3430 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3431 perror("ioctl[SIOCSIWFRAG]");
3432 return -1;
3433 }
3434
3435 return 0;
3436 #endif /* NO_WEXT */
3437 }
3438
3439
3440 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3441 {
3442 #ifdef NO_WEXT
3443 return -1;
3444 #else /* NO_WEXT */
3445 struct wpa_driver_nl80211_data *drv = priv;
3446 struct iwreq iwr;
3447
3448 memset(&iwr, 0, sizeof(iwr));
3449 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3450
3451 iwr.u.retry.value = short_retry;
3452 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3453 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3454 perror("ioctl[SIOCSIWRETRY(short)]");
3455 return -1;
3456 }
3457
3458 iwr.u.retry.value = long_retry;
3459 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3460 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3461 perror("ioctl[SIOCSIWRETRY(long)]");
3462 return -1;
3463 }
3464
3465 return 0;
3466 #endif /* NO_WEXT */
3467 }
3468
3469
3470 static int i802_flush(void *priv)
3471 {
3472 struct wpa_driver_nl80211_data *drv = priv;
3473 struct nl_msg *msg;
3474
3475 msg = nlmsg_alloc();
3476 if (!msg)
3477 return -1;
3478
3479 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3480 0, NL80211_CMD_DEL_STATION, 0);
3481
3482 /*
3483 * XXX: FIX! this needs to flush all VLANs too
3484 */
3485 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3486 if_nametoindex(drv->ifname));
3487
3488 return send_and_recv_msgs(drv, msg, NULL, NULL);
3489 nla_put_failure:
3490 return -ENOBUFS;
3491 }
3492
3493
3494 static int get_sta_handler(struct nl_msg *msg, void *arg)
3495 {
3496 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3497 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3498 struct hostap_sta_driver_data *data = arg;
3499 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3500 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3501 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3502 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3503 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3504 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3505 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3506 };
3507
3508 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3509 genlmsg_attrlen(gnlh, 0), NULL);
3510
3511 /*
3512 * TODO: validate the interface and mac address!
3513 * Otherwise, there's a race condition as soon as
3514 * the kernel starts sending station notifications.
3515 */
3516
3517 if (!tb[NL80211_ATTR_STA_INFO]) {
3518 wpa_printf(MSG_DEBUG, "sta stats missing!");
3519 return NL_SKIP;
3520 }
3521 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3522 tb[NL80211_ATTR_STA_INFO],
3523 stats_policy)) {
3524 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3525 return NL_SKIP;
3526 }
3527
3528 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3529 data->inactive_msec =
3530 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3531 if (stats[NL80211_STA_INFO_RX_BYTES])
3532 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3533 if (stats[NL80211_STA_INFO_TX_BYTES])
3534 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3535 if (stats[NL80211_STA_INFO_RX_PACKETS])
3536 data->rx_packets =
3537 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3538 if (stats[NL80211_STA_INFO_TX_PACKETS])
3539 data->tx_packets =
3540 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3541
3542 return NL_SKIP;
3543 }
3544
3545 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3546 const u8 *addr)
3547 {
3548 struct wpa_driver_nl80211_data *drv = priv;
3549 struct nl_msg *msg;
3550
3551 os_memset(data, 0, sizeof(*data));
3552 msg = nlmsg_alloc();
3553 if (!msg)
3554 return -ENOMEM;
3555
3556 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3557 0, NL80211_CMD_GET_STATION, 0);
3558
3559 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3560 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3561
3562 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3563 nla_put_failure:
3564 return -ENOBUFS;
3565 }
3566
3567
3568 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3569 int cw_min, int cw_max, int burst_time)
3570 {
3571 struct wpa_driver_nl80211_data *drv = priv;
3572 struct nl_msg *msg;
3573 struct nlattr *txq, *params;
3574
3575 msg = nlmsg_alloc();
3576 if (!msg)
3577 return -1;
3578
3579 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3580 0, NL80211_CMD_SET_WIPHY, 0);
3581
3582 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3583
3584 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3585 if (!txq)
3586 goto nla_put_failure;
3587
3588 /* We are only sending parameters for a single TXQ at a time */
3589 params = nla_nest_start(msg, 1);
3590 if (!params)
3591 goto nla_put_failure;
3592
3593 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3594 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3595 * 32 usec, so need to convert the value here. */
3596 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3597 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3598 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3599 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3600
3601 nla_nest_end(msg, params);
3602
3603 nla_nest_end(msg, txq);
3604
3605 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3606 return 0;
3607 nla_put_failure:
3608 return -1;
3609 }
3610
3611
3612 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3613 {
3614 struct wpa_driver_nl80211_data *drv = priv;
3615 int ifidx;
3616 struct i802_bss *bss;
3617
3618 bss = os_zalloc(sizeof(*bss));
3619 if (bss == NULL)
3620 return -1;
3621
3622 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3623 if (ifidx < 0) {
3624 os_free(bss);
3625 return -1;
3626 }
3627 bss->ifindex = ifidx;
3628 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3629 nl80211_remove_iface(priv, ifidx);
3630 os_free(bss);
3631 return -1;
3632 }
3633 bss->next = drv->bss.next;
3634 drv->bss.next = bss;
3635 return 0;
3636 }
3637
3638
3639 static int i802_bss_remove(void *priv, const char *ifname)
3640 {
3641 struct wpa_driver_nl80211_data *drv = priv;
3642 struct i802_bss *bss, *prev;
3643 int ifindex = if_nametoindex(ifname);
3644 nl80211_remove_iface(priv, ifindex);
3645 prev = &drv->bss;
3646 bss = drv->bss.next;
3647 while (bss) {
3648 if (ifindex == bss->ifindex) {
3649 prev->next = bss->next;
3650 os_free(bss);
3651 break;
3652 }
3653 prev = bss;
3654 bss = bss->next;
3655 }
3656 return 0;
3657 }
3658
3659
3660 static int i802_set_beacon(const char *iface, void *priv,
3661 const u8 *head, size_t head_len,
3662 const u8 *tail, size_t tail_len, int dtim_period)
3663 {
3664 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3665 head, head_len,
3666 tail, tail_len,
3667 dtim_period);
3668 }
3669
3670
3671 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3672 {
3673 struct wpa_driver_nl80211_data *drv = priv;
3674 struct nl_msg *msg;
3675
3676 msg = nlmsg_alloc();
3677 if (!msg)
3678 return -ENOMEM;
3679
3680 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3681 NL80211_CMD_SET_BSS, 0);
3682
3683 if (cts >= 0)
3684 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3685 if (preamble >= 0)
3686 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3687 if (slot >= 0)
3688 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3689
3690 /* TODO: multi-BSS support */
3691 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3692
3693 return send_and_recv_msgs(drv, msg, NULL, NULL);
3694 nla_put_failure:
3695 return -ENOBUFS;
3696 }
3697
3698
3699 static int i802_set_cts_protect(void *priv, int value)
3700 {
3701 return i802_set_bss(priv, value, -1, -1);
3702 }
3703
3704
3705 static int i802_set_preamble(void *priv, int value)
3706 {
3707 return i802_set_bss(priv, -1, value, -1);
3708 }
3709
3710
3711 static int i802_set_short_slot_time(void *priv, int value)
3712 {
3713 return i802_set_bss(priv, -1, -1, value);
3714 }
3715
3716
3717 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3718 {
3719 switch (type) {
3720 case HOSTAPD_IF_VLAN:
3721 return NL80211_IFTYPE_AP_VLAN;
3722 }
3723 return -1;
3724 }
3725
3726
3727 static int i802_if_add(const char *iface, void *priv,
3728 enum hostapd_driver_if_type type, char *ifname,
3729 const u8 *addr)
3730 {
3731 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3732 return -1;
3733 return 0;
3734 }
3735
3736
3737 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3738 char *ifname, const u8 *addr)
3739 {
3740 /* unused at the moment */
3741 return -1;
3742 }
3743
3744
3745 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3746 const char *ifname, const u8 *addr)
3747 {
3748 nl80211_remove_iface(priv, if_nametoindex(ifname));
3749 return 0;
3750 }
3751
3752
3753 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3754 const char *ifname, int vlan_id)
3755 {
3756 struct wpa_driver_nl80211_data *drv = priv;
3757 struct nl_msg *msg;
3758
3759 msg = nlmsg_alloc();
3760 if (!msg)
3761 return -ENOMEM;
3762
3763 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3764 0, NL80211_CMD_SET_STATION, 0);
3765
3766 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3767 if_nametoindex(drv->ifname));
3768 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3769 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3770 if_nametoindex(ifname));
3771
3772 return send_and_recv_msgs(drv, msg, NULL, NULL);
3773 nla_put_failure:
3774 return -ENOBUFS;
3775 }
3776
3777
3778 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3779 {
3780 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3781 struct sockaddr_ll lladdr;
3782 unsigned char buf[3000];
3783 int len;
3784 socklen_t fromlen = sizeof(lladdr);
3785
3786 len = recvfrom(sock, buf, sizeof(buf), 0,
3787 (struct sockaddr *)&lladdr, &fromlen);
3788 if (len < 0) {
3789 perror("recv");
3790 return;
3791 }
3792
3793 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3794 void *ctx;
3795 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
3796 if (!ctx)
3797 return;
3798 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
3799 }
3800 }
3801
3802
3803 static int i802_get_inact_sec(void *priv, const u8 *addr)
3804 {
3805 struct hostap_sta_driver_data data;
3806 int ret;
3807
3808 data.inactive_msec = (unsigned long) -1;
3809 ret = i802_read_sta_data(priv, &data, addr);
3810 if (ret || data.inactive_msec == (unsigned long) -1)
3811 return -1;
3812 return data.inactive_msec / 1000;
3813 }
3814
3815
3816 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3817 {
3818 #if 0
3819 /* TODO */
3820 #endif
3821 return 0;
3822 }
3823
3824
3825 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
3826 int reason)
3827 {
3828 struct wpa_driver_nl80211_data *drv = priv;
3829 struct ieee80211_mgmt mgmt;
3830
3831 memset(&mgmt, 0, sizeof(mgmt));
3832 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3833 WLAN_FC_STYPE_DEAUTH);
3834 memcpy(mgmt.da, addr, ETH_ALEN);
3835 memcpy(mgmt.sa, own_addr, ETH_ALEN);
3836 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3837 mgmt.u.deauth.reason_code = host_to_le16(reason);
3838 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3839 IEEE80211_HDRLEN +
3840 sizeof(mgmt.u.deauth));
3841 }
3842
3843
3844 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
3845 int reason)
3846 {
3847 struct wpa_driver_nl80211_data *drv = priv;
3848 struct ieee80211_mgmt mgmt;
3849
3850 memset(&mgmt, 0, sizeof(mgmt));
3851 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3852 WLAN_FC_STYPE_DISASSOC);
3853 memcpy(mgmt.da, addr, ETH_ALEN);
3854 memcpy(mgmt.sa, own_addr, ETH_ALEN);
3855 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3856 mgmt.u.disassoc.reason_code = host_to_le16(reason);
3857 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3858 IEEE80211_HDRLEN +
3859 sizeof(mgmt.u.disassoc));
3860 }
3861
3862
3863 static void *i802_init(struct hostapd_data *hapd,
3864 struct wpa_init_params *params)
3865 {
3866 struct wpa_driver_nl80211_data *drv;
3867 size_t i;
3868
3869 drv = wpa_driver_nl80211_init(hapd, params->ifname);
3870 if (drv == NULL)
3871 return NULL;
3872
3873 drv->bss.ifindex = drv->ifindex;
3874
3875 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3876 drv->if_indices = drv->default_if_indices;
3877 for (i = 0; i < params->num_bridge; i++) {
3878 if (params->bridge[i])
3879 add_ifidx(drv, if_nametoindex(params->bridge[i]));
3880 }
3881
3882 /* start listening for EAPOL on the default AP interface */
3883 add_ifidx(drv, drv->ifindex);
3884
3885 if (params->bssid) {
3886 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3887 goto failed;
3888
3889 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
3890 goto failed;
3891 }
3892
3893 if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3894 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3895 "into AP mode", drv->ifname);
3896 goto failed;
3897 }
3898
3899 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3900 goto failed;
3901
3902 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3903 if (drv->eapol_sock < 0) {
3904 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3905 goto failed;
3906 }
3907
3908 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3909 {
3910 printf("Could not register read socket for eapol\n");
3911 goto failed;
3912 }
3913
3914 if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
3915 goto failed;
3916
3917 return drv;
3918
3919 failed:
3920 nl80211_remove_monitor_interface(drv);
3921 if (drv->ioctl_sock >= 0)
3922 close(drv->ioctl_sock);
3923
3924 genl_family_put(drv->nl80211);
3925 nl_cache_free(drv->nl_cache);
3926 nl_handle_destroy(drv->nl_handle);
3927 nl_cb_put(drv->nl_cb);
3928
3929 os_free(drv);
3930 return NULL;
3931 }
3932
3933
3934 static void i802_deinit(void *priv)
3935 {
3936 wpa_driver_nl80211_deinit(priv);
3937 }
3938
3939 #endif /* HOSTAPD */
3940
3941
3942 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
3943 .name = "nl80211",
3944 .desc = "Linux nl80211/cfg80211",
3945 #ifndef HOSTAPD
3946 .get_bssid = wpa_driver_nl80211_get_bssid,
3947 .get_ssid = wpa_driver_nl80211_get_ssid,
3948 .set_key = wpa_driver_nl80211_set_key,
3949 #endif /* HOSTAPD */
3950 .scan2 = wpa_driver_nl80211_scan,
3951 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
3952 #ifndef HOSTAPD
3953 .deauthenticate = wpa_driver_nl80211_deauthenticate,
3954 .disassociate = wpa_driver_nl80211_disassociate,
3955 .authenticate = wpa_driver_nl80211_authenticate,
3956 .associate = wpa_driver_nl80211_associate,
3957 .init = wpa_driver_nl80211_init,
3958 .deinit = wpa_driver_nl80211_deinit,
3959 .get_capa = wpa_driver_nl80211_get_capa,
3960 .set_operstate = wpa_driver_nl80211_set_operstate,
3961 #endif /* HOSTAPD */
3962 .set_country = wpa_driver_nl80211_set_country,
3963 .set_mode = wpa_driver_nl80211_set_mode,
3964 #ifdef CONFIG_AP
3965 .set_beacon = wpa_driver_nl80211_set_beacon,
3966 #endif /* CONFIG_AP */
3967 #if defined(CONFIG_AP) || defined(HOSTAPD)
3968 .send_mlme = wpa_driver_nl80211_send_mlme,
3969 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
3970 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
3971 .sta_add = wpa_driver_nl80211_sta_add,
3972 .sta_remove = wpa_driver_nl80211_sta_remove,
3973 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
3974 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
3975 #endif /* CONFIG_AP || HOSTAPD */
3976 #ifdef HOSTAPD
3977 .hapd_init = i802_init,
3978 .hapd_deinit = i802_deinit,
3979 .hapd_set_key = i802_set_key,
3980 .get_seqnum = i802_get_seqnum,
3981 .flush = i802_flush,
3982 .read_sta_data = i802_read_sta_data,
3983 .sta_deauth = i802_sta_deauth,
3984 .sta_disassoc = i802_sta_disassoc,
3985 .get_inact_sec = i802_get_inact_sec,
3986 .sta_clear_stats = i802_sta_clear_stats,
3987 .set_freq = i802_set_freq,
3988 .set_rts = i802_set_rts,
3989 .set_frag = i802_set_frag,
3990 .set_retry = i802_set_retry,
3991 .set_rate_sets = i802_set_rate_sets,
3992 .hapd_set_beacon = i802_set_beacon,
3993 .set_cts_protect = i802_set_cts_protect,
3994 .set_preamble = i802_set_preamble,
3995 .set_short_slot_time = i802_set_short_slot_time,
3996 .set_tx_queue_params = i802_set_tx_queue_params,
3997 .bss_add = i802_bss_add,
3998 .bss_remove = i802_bss_remove,
3999 .if_add = i802_if_add,
4000 .if_update = i802_if_update,
4001 .if_remove = i802_if_remove,
4002 .set_sta_vlan = i802_set_sta_vlan,
4003 #endif /* HOSTAPD */
4004 };
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