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nl80211: Add helper functions for SIOC{G,S}IFHWADDR
[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 #endif /* CONFIG_AP || HOSTAPD */
42
43 #ifdef CONFIG_AP
44
45 #include "../hostapd/hostapd_defs.h"
46
47 #ifndef ETH_P_ALL
48 #define ETH_P_ALL 0x0003
49 #endif
50
51 #endif /* CONFIG_AP */
52
53 #ifdef HOSTAPD
54 #include "../../hostapd/hostapd.h"
55 #include "../../hostapd/sta_flags.h"
56 #include "ieee802_11_common.h"
57
58 #ifdef CONFIG_LIBNL20
59 /* libnl 2.0 compatibility code */
60 #define nl_handle_alloc_cb nl_socket_alloc_cb
61 #define nl_handle_destroy nl_socket_free
62 #endif /* CONFIG_LIBNL20 */
63
64 #endif /* HOSTAPD */
65
66
67 #ifndef IFF_LOWER_UP
68 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
69 #endif
70 #ifndef IFF_DORMANT
71 #define IFF_DORMANT 0x20000 /* driver signals dormant */
72 #endif
73
74 #ifndef IF_OPER_DORMANT
75 #define IF_OPER_DORMANT 5
76 #endif
77 #ifndef IF_OPER_UP
78 #define IF_OPER_UP 6
79 #endif
80
81 enum ieee80211_msg_type {
82 ieee80211_msg_normal = 0,
83 ieee80211_msg_tx_callback_ack = 1,
84 ieee80211_msg_tx_callback_fail = 2,
85 };
86
87 struct i802_bss {
88 struct i802_bss *next;
89 int ifindex;
90 unsigned int beacon_set:1;
91 };
92
93 struct wpa_driver_nl80211_data {
94 void *ctx;
95 int link_event_sock;
96 int ioctl_sock; /* socket for ioctl() use */
97 char ifname[IFNAMSIZ + 1];
98 int ifindex;
99 int if_removed;
100 struct wpa_driver_capa capa;
101 int has_capability;
102
103 int operstate;
104
105 int scan_complete_events;
106
107 struct nl_handle *nl_handle;
108 struct nl_cache *nl_cache;
109 struct nl_cb *nl_cb;
110 struct genl_family *nl80211;
111
112 u8 bssid[ETH_ALEN];
113 int associated;
114 u8 ssid[32];
115 size_t ssid_len;
116 int nlmode;
117 int ap_scan_as_station;
118
119 int beacon_int;
120 int monitor_sock;
121 int monitor_ifidx;
122
123 #ifdef CONFIG_AP
124 unsigned int beacon_set:1;
125 #endif /* CONFIG_AP */
126
127 #ifdef HOSTAPD
128 struct hostapd_data *hapd;
129
130 int eapol_sock; /* socket for EAPOL frames */
131
132 int default_if_indices[16];
133 int *if_indices;
134 int num_if_indices;
135
136 struct i802_bss bss;
137
138 int last_freq;
139 int last_freq_ht;
140 #endif /* HOSTAPD */
141 };
142
143
144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
145 void *timeout_ctx);
146 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
147 static int
148 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
149
150 #ifdef CONFIG_AP
151 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
152 int ifidx);
153 #endif /* CONFIG_AP */
154
155 #ifdef HOSTAPD
156 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
157 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
158 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
159 int ifindex);
160 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
161 int ifidx);
162 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
163 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv);
164 #endif /* HOSTAPD */
165
166
167 /* nl80211 code */
168 static int ack_handler(struct nl_msg *msg, void *arg)
169 {
170 int *err = arg;
171 *err = 0;
172 return NL_STOP;
173 }
174
175 static int finish_handler(struct nl_msg *msg, void *arg)
176 {
177 int *ret = arg;
178 *ret = 0;
179 return NL_SKIP;
180 }
181
182 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
183 void *arg)
184 {
185 int *ret = arg;
186 *ret = err->error;
187 return NL_SKIP;
188 }
189
190
191 static int no_seq_check(struct nl_msg *msg, void *arg)
192 {
193 return NL_OK;
194 }
195
196
197 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
198 struct nl_msg *msg,
199 int (*valid_handler)(struct nl_msg *, void *),
200 void *valid_data)
201 {
202 struct nl_cb *cb;
203 int err = -ENOMEM;
204
205 cb = nl_cb_clone(drv->nl_cb);
206 if (!cb)
207 goto out;
208
209 err = nl_send_auto_complete(drv->nl_handle, msg);
210 if (err < 0)
211 goto out;
212
213 err = 1;
214
215 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
216 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
217 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
218
219 if (valid_handler)
220 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
221 valid_handler, valid_data);
222
223 while (err > 0)
224 nl_recvmsgs(drv->nl_handle, cb);
225 out:
226 nl_cb_put(cb);
227 nlmsg_free(msg);
228 return err;
229 }
230
231
232 struct family_data {
233 const char *group;
234 int id;
235 };
236
237
238 static int family_handler(struct nl_msg *msg, void *arg)
239 {
240 struct family_data *res = arg;
241 struct nlattr *tb[CTRL_ATTR_MAX + 1];
242 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
243 struct nlattr *mcgrp;
244 int i;
245
246 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
247 genlmsg_attrlen(gnlh, 0), NULL);
248 if (!tb[CTRL_ATTR_MCAST_GROUPS])
249 return NL_SKIP;
250
251 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
252 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
253 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
254 nla_len(mcgrp), NULL);
255 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
256 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
257 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
258 res->group,
259 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
260 continue;
261 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
262 break;
263 };
264
265 return NL_SKIP;
266 }
267
268
269 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
270 const char *family, const char *group)
271 {
272 struct nl_msg *msg;
273 int ret = -1;
274 struct family_data res = { group, -ENOENT };
275
276 msg = nlmsg_alloc();
277 if (!msg)
278 return -ENOMEM;
279 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
280 0, 0, CTRL_CMD_GETFAMILY, 0);
281 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
282
283 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
284 msg = NULL;
285 if (ret == 0)
286 ret = res.id;
287
288 nla_put_failure:
289 nlmsg_free(msg);
290 return ret;
291 }
292
293
294 #ifdef HOSTAPD
295 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
296 const char *ifname, u8 *addr)
297 {
298 struct ifreq ifr;
299
300 os_memset(&ifr, 0, sizeof(ifr));
301 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
302 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
303 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
304 ifname, errno, strerror(errno));
305 return -1;
306 }
307
308 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
309 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
310 ifname, ifr.ifr_hwaddr.sa_family);
311 return -1;
312 }
313 os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
314
315 return 0;
316 }
317
318
319 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
320 const char *ifname, const u8 *addr)
321 {
322 struct ifreq ifr;
323
324 os_memset(&ifr, 0, sizeof(ifr));
325 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
326 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
327 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
328
329 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
330 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
331 ifname, errno, strerror(errno));
332 return -1;
333 }
334
335 return 0;
336 }
337 #endif /* HOSTAPD */
338
339
340 static int wpa_driver_nl80211_send_oper_ifla(
341 struct wpa_driver_nl80211_data *drv,
342 int linkmode, int operstate)
343 {
344 struct {
345 struct nlmsghdr hdr;
346 struct ifinfomsg ifinfo;
347 char opts[16];
348 } req;
349 struct rtattr *rta;
350 static int nl_seq;
351 ssize_t ret;
352
353 os_memset(&req, 0, sizeof(req));
354
355 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
356 req.hdr.nlmsg_type = RTM_SETLINK;
357 req.hdr.nlmsg_flags = NLM_F_REQUEST;
358 req.hdr.nlmsg_seq = ++nl_seq;
359 req.hdr.nlmsg_pid = 0;
360
361 req.ifinfo.ifi_family = AF_UNSPEC;
362 req.ifinfo.ifi_type = 0;
363 req.ifinfo.ifi_index = drv->ifindex;
364 req.ifinfo.ifi_flags = 0;
365 req.ifinfo.ifi_change = 0;
366
367 if (linkmode != -1) {
368 rta = (struct rtattr *)
369 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
370 rta->rta_type = IFLA_LINKMODE;
371 rta->rta_len = RTA_LENGTH(sizeof(char));
372 *((char *) RTA_DATA(rta)) = linkmode;
373 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
374 RTA_LENGTH(sizeof(char));
375 }
376 if (operstate != -1) {
377 rta = (struct rtattr *)
378 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
379 rta->rta_type = IFLA_OPERSTATE;
380 rta->rta_len = RTA_LENGTH(sizeof(char));
381 *((char *) RTA_DATA(rta)) = operstate;
382 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
383 RTA_LENGTH(sizeof(char));
384 }
385
386 wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
387 linkmode, operstate);
388
389 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
390 if (ret < 0) {
391 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
392 " %s (assume operstate is not supported)",
393 strerror(errno));
394 }
395
396 return ret < 0 ? -1 : 0;
397 }
398
399
400 #ifndef NO_WEXT
401 static int wpa_driver_nl80211_set_auth_param(
402 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
403 {
404 struct iwreq iwr;
405 int ret = 0;
406
407 os_memset(&iwr, 0, sizeof(iwr));
408 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
409 iwr.u.param.flags = idx & IW_AUTH_INDEX;
410 iwr.u.param.value = value;
411
412 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
413 if (errno != EOPNOTSUPP) {
414 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
415 "value 0x%x) failed: %s)",
416 idx, value, strerror(errno));
417 }
418 ret = errno == EOPNOTSUPP ? -2 : -1;
419 }
420
421 return ret;
422 }
423 #endif /* NO_WEXT */
424
425
426 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
427 {
428 struct wpa_driver_nl80211_data *drv = priv;
429 if (!drv->associated)
430 return -1;
431 os_memcpy(bssid, drv->bssid, ETH_ALEN);
432 return 0;
433 }
434
435
436 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
437 {
438 struct wpa_driver_nl80211_data *drv = priv;
439 if (!drv->associated)
440 return -1;
441 os_memcpy(ssid, drv->ssid, drv->ssid_len);
442 return drv->ssid_len;
443 }
444
445
446 #ifndef HOSTAPD
447 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
448 void *ctx, char *buf, size_t len,
449 int del)
450 {
451 union wpa_event_data event;
452
453 os_memset(&event, 0, sizeof(event));
454 if (len > sizeof(event.interface_status.ifname))
455 len = sizeof(event.interface_status.ifname) - 1;
456 os_memcpy(event.interface_status.ifname, buf, len);
457 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
458 EVENT_INTERFACE_ADDED;
459
460 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
461 del ? "DEL" : "NEW",
462 event.interface_status.ifname,
463 del ? "removed" : "added");
464
465 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
466 if (del)
467 drv->if_removed = 1;
468 else
469 drv->if_removed = 0;
470 }
471
472 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
473 }
474
475
476 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
477 struct nlmsghdr *h)
478 {
479 struct ifinfomsg *ifi;
480 int attrlen, _nlmsg_len, rta_len;
481 struct rtattr *attr;
482
483 ifi = NLMSG_DATA(h);
484
485 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
486
487 attrlen = h->nlmsg_len - _nlmsg_len;
488 if (attrlen < 0)
489 return 0;
490
491 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
492
493 rta_len = RTA_ALIGN(sizeof(struct rtattr));
494 while (RTA_OK(attr, attrlen)) {
495 if (attr->rta_type == IFLA_IFNAME) {
496 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
497 == 0)
498 return 1;
499 else
500 break;
501 }
502 attr = RTA_NEXT(attr, attrlen);
503 }
504
505 return 0;
506 }
507
508
509 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
510 int ifindex, struct nlmsghdr *h)
511 {
512 if (drv->ifindex == ifindex)
513 return 1;
514
515 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
516 drv->ifindex = if_nametoindex(drv->ifname);
517 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
518 "interface");
519 wpa_driver_nl80211_finish_drv_init(drv);
520 return 1;
521 }
522
523 return 0;
524 }
525
526
527 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
528 void *ctx, struct nlmsghdr *h,
529 size_t len)
530 {
531 struct ifinfomsg *ifi;
532 int attrlen, _nlmsg_len, rta_len;
533 struct rtattr * attr;
534
535 if (len < sizeof(*ifi))
536 return;
537
538 ifi = NLMSG_DATA(h);
539
540 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
541 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
542 ifi->ifi_index);
543 return;
544 }
545
546 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
547 "(%s%s%s%s)",
548 drv->operstate, ifi->ifi_flags,
549 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
550 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
551 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
552 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
553 /*
554 * Some drivers send the association event before the operup event--in
555 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
556 * fails. This will hit us when wpa_supplicant does not need to do
557 * IEEE 802.1X authentication
558 */
559 if (drv->operstate == 1 &&
560 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
561 !(ifi->ifi_flags & IFF_RUNNING))
562 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
563
564 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
565
566 attrlen = h->nlmsg_len - _nlmsg_len;
567 if (attrlen < 0)
568 return;
569
570 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
571
572 rta_len = RTA_ALIGN(sizeof(struct rtattr));
573 while (RTA_OK(attr, attrlen)) {
574 if (attr->rta_type == IFLA_IFNAME) {
575 wpa_driver_nl80211_event_link(
576 drv, ctx,
577 ((char *) attr) + rta_len,
578 attr->rta_len - rta_len, 0);
579 }
580 attr = RTA_NEXT(attr, attrlen);
581 }
582 }
583
584
585 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
586 void *ctx, struct nlmsghdr *h,
587 size_t len)
588 {
589 struct ifinfomsg *ifi;
590 int attrlen, _nlmsg_len, rta_len;
591 struct rtattr * attr;
592
593 if (len < sizeof(*ifi))
594 return;
595
596 ifi = NLMSG_DATA(h);
597
598 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
599
600 attrlen = h->nlmsg_len - _nlmsg_len;
601 if (attrlen < 0)
602 return;
603
604 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
605
606 rta_len = RTA_ALIGN(sizeof(struct rtattr));
607 while (RTA_OK(attr, attrlen)) {
608 if (attr->rta_type == IFLA_IFNAME) {
609 wpa_driver_nl80211_event_link(
610 drv, ctx,
611 ((char *) attr) + rta_len,
612 attr->rta_len - rta_len, 1);
613 }
614 attr = RTA_NEXT(attr, attrlen);
615 }
616 }
617
618
619 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
620 void *sock_ctx)
621 {
622 char buf[8192];
623 int left;
624 struct sockaddr_nl from;
625 socklen_t fromlen;
626 struct nlmsghdr *h;
627 int max_events = 10;
628
629 try_again:
630 fromlen = sizeof(from);
631 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
632 (struct sockaddr *) &from, &fromlen);
633 if (left < 0) {
634 if (errno != EINTR && errno != EAGAIN)
635 perror("recvfrom(netlink)");
636 return;
637 }
638
639 h = (struct nlmsghdr *) buf;
640 while (left >= (int) sizeof(*h)) {
641 int len, plen;
642
643 len = h->nlmsg_len;
644 plen = len - sizeof(*h);
645 if (len > left || plen < 0) {
646 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
647 "len=%d left=%d plen=%d",
648 len, left, plen);
649 break;
650 }
651
652 switch (h->nlmsg_type) {
653 case RTM_NEWLINK:
654 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
655 h, plen);
656 break;
657 case RTM_DELLINK:
658 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
659 h, plen);
660 break;
661 }
662
663 len = NLMSG_ALIGN(len);
664 left -= len;
665 h = (struct nlmsghdr *) ((char *) h + len);
666 }
667
668 if (left > 0) {
669 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
670 "message", left);
671 }
672
673 if (--max_events > 0) {
674 /*
675 * Try to receive all events in one eloop call in order to
676 * limit race condition on cases where AssocInfo event, Assoc
677 * event, and EAPOL frames are received more or less at the
678 * same time. We want to process the event messages first
679 * before starting EAPOL processing.
680 */
681 goto try_again;
682 }
683 }
684
685
686 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
687 const u8 *frame, size_t len)
688 {
689 const struct ieee80211_mgmt *mgmt;
690 union wpa_event_data event;
691
692 mgmt = (const struct ieee80211_mgmt *) frame;
693 if (len < 24 + sizeof(mgmt->u.auth)) {
694 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
695 "frame");
696 return;
697 }
698
699 os_memset(&event, 0, sizeof(event));
700 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
701 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
702 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
703 if (len > 24 + sizeof(mgmt->u.auth)) {
704 event.auth.ies = mgmt->u.auth.variable;
705 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
706 }
707
708 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
709 }
710
711
712 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
713 const u8 *frame, size_t len)
714 {
715 const struct ieee80211_mgmt *mgmt;
716 union wpa_event_data event;
717 u16 status;
718
719 mgmt = (const struct ieee80211_mgmt *) frame;
720 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
721 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
722 "frame");
723 return;
724 }
725
726 status = le_to_host16(mgmt->u.assoc_resp.status_code);
727 if (status != WLAN_STATUS_SUCCESS) {
728 os_memset(&event, 0, sizeof(event));
729 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
730 event.assoc_reject.resp_ies =
731 (u8 *) mgmt->u.assoc_resp.variable;
732 event.assoc_reject.resp_ies_len =
733 len - 24 - sizeof(mgmt->u.assoc_resp);
734 }
735 event.assoc_reject.status_code = status;
736
737 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
738 return;
739 }
740
741 drv->associated = 1;
742 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
743
744 os_memset(&event, 0, sizeof(event));
745 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
746 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
747 event.assoc_info.resp_ies_len =
748 len - 24 - sizeof(mgmt->u.assoc_resp);
749 }
750
751 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
752 }
753
754
755 static void mlme_event(struct wpa_driver_nl80211_data *drv,
756 enum nl80211_commands cmd, struct nlattr *frame)
757 {
758 if (frame == NULL) {
759 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
760 "data", cmd);
761 return;
762 }
763
764 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
765 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
766 nla_data(frame), nla_len(frame));
767
768 switch (cmd) {
769 case NL80211_CMD_AUTHENTICATE:
770 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
771 break;
772 case NL80211_CMD_ASSOCIATE:
773 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
774 break;
775 case NL80211_CMD_DEAUTHENTICATE:
776 drv->associated = 0;
777 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
778 break;
779 case NL80211_CMD_DISASSOCIATE:
780 drv->associated = 0;
781 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
782 break;
783 default:
784 break;
785 }
786 }
787
788 #endif /* HOSTAPD */
789
790
791 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
792 struct nlattr *tb[])
793 {
794 union wpa_event_data data;
795
796 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
797 os_memset(&data, 0, sizeof(data));
798 if (tb[NL80211_ATTR_MAC]) {
799 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
800 nla_data(tb[NL80211_ATTR_MAC]),
801 nla_len(tb[NL80211_ATTR_MAC]));
802 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
803 }
804 if (tb[NL80211_ATTR_KEY_SEQ]) {
805 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
806 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
807 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
808 }
809 if (tb[NL80211_ATTR_KEY_TYPE]) {
810 enum nl80211_key_type key_type =
811 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
812 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
813 if (key_type == NL80211_KEYTYPE_PAIRWISE)
814 data.michael_mic_failure.unicast = 1;
815 } else
816 data.michael_mic_failure.unicast = 1;
817
818 if (tb[NL80211_ATTR_KEY_IDX]) {
819 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
820 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
821 }
822
823 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
824 }
825
826
827 static int process_event(struct nl_msg *msg, void *arg)
828 {
829 struct wpa_driver_nl80211_data *drv = arg;
830 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
831 struct nlattr *tb[NL80211_ATTR_MAX + 1];
832
833 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
834 genlmsg_attrlen(gnlh, 0), NULL);
835
836 if (tb[NL80211_ATTR_IFINDEX]) {
837 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
838 if (ifindex != drv->ifindex) {
839 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
840 " for foreign interface (ifindex %d)",
841 gnlh->cmd, ifindex);
842 return NL_SKIP;
843 }
844 }
845
846 if (drv->ap_scan_as_station &&
847 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
848 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
849 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
850 drv->ap_scan_as_station = 0;
851 }
852
853 switch (gnlh->cmd) {
854 case NL80211_CMD_NEW_SCAN_RESULTS:
855 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
856 drv->scan_complete_events = 1;
857 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
858 drv->ctx);
859 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
860 break;
861 case NL80211_CMD_SCAN_ABORTED:
862 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
863 /*
864 * Need to indicate that scan results are available in order
865 * not to make wpa_supplicant stop its scanning.
866 */
867 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
868 drv->ctx);
869 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
870 break;
871 #ifndef HOSTAPD
872 case NL80211_CMD_AUTHENTICATE:
873 case NL80211_CMD_ASSOCIATE:
874 case NL80211_CMD_DEAUTHENTICATE:
875 case NL80211_CMD_DISASSOCIATE:
876 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
877 break;
878 #endif /* HOSTAPD */
879 case NL80211_CMD_MICHAEL_MIC_FAILURE:
880 mlme_event_michael_mic_failure(drv, tb);
881 break;
882 default:
883 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
884 "(cmd=%d)", gnlh->cmd);
885 break;
886 }
887
888 return NL_SKIP;
889 }
890
891
892 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
893 void *sock_ctx)
894 {
895 struct nl_cb *cb;
896 struct wpa_driver_nl80211_data *drv = eloop_ctx;
897
898 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
899
900 cb = nl_cb_clone(drv->nl_cb);
901 if (!cb)
902 return;
903 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
904 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
905 nl_recvmsgs(drv->nl_handle, cb);
906 nl_cb_put(cb);
907 }
908
909
910 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
911 const char *ifname, int dev_up)
912 {
913 struct ifreq ifr;
914
915 if (drv->ioctl_sock < 0)
916 return -1;
917
918 os_memset(&ifr, 0, sizeof(ifr));
919 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
920
921 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
922 perror("ioctl[SIOCGIFFLAGS]");
923 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
924 ifname);
925 return -1;
926 }
927
928 if (dev_up) {
929 if (ifr.ifr_flags & IFF_UP)
930 return 0;
931 ifr.ifr_flags |= IFF_UP;
932 } else {
933 if (!(ifr.ifr_flags & IFF_UP))
934 return 0;
935 ifr.ifr_flags &= ~IFF_UP;
936 }
937
938 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
939 perror("ioctl[SIOCSIFFLAGS]");
940 return -1;
941 }
942
943 return 0;
944 }
945
946
947 /**
948 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
949 * @priv: driver_nl80211 private data
950 * @alpha2_arg: country to which to switch to
951 * Returns: 0 on success, -1 on failure
952 *
953 * This asks nl80211 to set the regulatory domain for given
954 * country ISO / IEC alpha2.
955 */
956 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
957 {
958 struct wpa_driver_nl80211_data *drv = priv;
959 char alpha2[3];
960 struct nl_msg *msg;
961
962 msg = nlmsg_alloc();
963 if (!msg)
964 return -ENOMEM;
965
966 alpha2[0] = alpha2_arg[0];
967 alpha2[1] = alpha2_arg[1];
968 alpha2[2] = '\0';
969
970 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
971 0, NL80211_CMD_REQ_SET_REG, 0);
972
973 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
974 if (send_and_recv_msgs(drv, msg, NULL, NULL))
975 return -EINVAL;
976 return 0;
977 nla_put_failure:
978 return -EINVAL;
979 }
980
981
982 #ifndef HOSTAPD
983 struct wiphy_info_data {
984 int max_scan_ssids;
985 int ap_supported;
986 };
987
988
989 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
990 {
991 struct nlattr *tb[NL80211_ATTR_MAX + 1];
992 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
993 struct wiphy_info_data *info = arg;
994
995 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
996 genlmsg_attrlen(gnlh, 0), NULL);
997
998 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
999 info->max_scan_ssids =
1000 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1001
1002 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1003 struct nlattr *nl_mode;
1004 int i;
1005 nla_for_each_nested(nl_mode,
1006 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1007 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1008 info->ap_supported = 1;
1009 break;
1010 }
1011 }
1012 }
1013
1014 return NL_SKIP;
1015 }
1016
1017
1018 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1019 struct wiphy_info_data *info)
1020 {
1021 struct nl_msg *msg;
1022
1023 os_memset(info, 0, sizeof(*info));
1024 msg = nlmsg_alloc();
1025 if (!msg)
1026 return -1;
1027
1028 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1029 0, NL80211_CMD_GET_WIPHY, 0);
1030
1031 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1032
1033 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1034 return 0;
1035 msg = NULL;
1036 nla_put_failure:
1037 nlmsg_free(msg);
1038 return -1;
1039 }
1040
1041
1042 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1043 {
1044 struct wiphy_info_data info;
1045 if (wpa_driver_nl80211_get_info(drv, &info))
1046 return;
1047 drv->has_capability = 1;
1048 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1049 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1050 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1051 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1052 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1053 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1054 WPA_DRIVER_CAPA_ENC_WEP104 |
1055 WPA_DRIVER_CAPA_ENC_TKIP |
1056 WPA_DRIVER_CAPA_ENC_CCMP;
1057
1058 drv->capa.max_scan_ssids = info.max_scan_ssids;
1059 if (info.ap_supported)
1060 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1061 }
1062 #endif /* HOSTAPD */
1063
1064
1065 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1066 void *ctx)
1067 {
1068 int ret;
1069
1070 /* Initialize generic netlink and nl80211 */
1071
1072 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1073 if (drv->nl_cb == NULL) {
1074 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1075 "callbacks");
1076 goto err1;
1077 }
1078
1079 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1080 if (drv->nl_handle == NULL) {
1081 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1082 "callbacks");
1083 goto err2;
1084 }
1085
1086 if (genl_connect(drv->nl_handle)) {
1087 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1088 "netlink");
1089 goto err3;
1090 }
1091
1092 #ifdef CONFIG_LIBNL20
1093 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1094 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1095 "netlink cache");
1096 goto err3;
1097 }
1098 #else /* CONFIG_LIBNL20 */
1099 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1100 if (drv->nl_cache == NULL) {
1101 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1102 "netlink cache");
1103 goto err3;
1104 }
1105 #endif /* CONFIG_LIBNL20 */
1106
1107
1108 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1109 if (drv->nl80211 == NULL) {
1110 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1111 "found");
1112 goto err4;
1113 }
1114
1115 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1116 if (ret >= 0)
1117 ret = nl_socket_add_membership(drv->nl_handle, ret);
1118 if (ret < 0) {
1119 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1120 "membership for scan events: %d (%s)",
1121 ret, strerror(-ret));
1122 goto err4;
1123 }
1124
1125 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1126 if (ret >= 0)
1127 ret = nl_socket_add_membership(drv->nl_handle, ret);
1128 if (ret < 0) {
1129 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1130 "membership for mlme events: %d (%s)",
1131 ret, strerror(-ret));
1132 goto err4;
1133 }
1134
1135 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1136 wpa_driver_nl80211_event_receive, drv, ctx);
1137
1138 return 0;
1139
1140 err4:
1141 nl_cache_free(drv->nl_cache);
1142 err3:
1143 nl_handle_destroy(drv->nl_handle);
1144 err2:
1145 nl_cb_put(drv->nl_cb);
1146 err1:
1147 return -1;
1148 }
1149
1150
1151 static int wpa_driver_nl80211_init_link_events(
1152 struct wpa_driver_nl80211_data *drv)
1153 {
1154 #ifdef HOSTAPD
1155 return 0;
1156 #else /* HOSTAPD */
1157 int s;
1158 struct sockaddr_nl local;
1159
1160 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1161 if (s < 0) {
1162 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1163 goto failed;
1164 }
1165
1166 os_memset(&local, 0, sizeof(local));
1167 local.nl_family = AF_NETLINK;
1168 local.nl_groups = RTMGRP_LINK;
1169 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1170 perror("bind(netlink)");
1171 close(s);
1172 return -1;
1173 }
1174
1175 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1176 ctx);
1177 drv->link_event_sock = s;
1178
1179 return 0;
1180 #endif /* HOSTAPD */
1181 }
1182
1183
1184 /**
1185 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1186 * @ctx: context to be used when calling wpa_supplicant functions,
1187 * e.g., wpa_supplicant_event()
1188 * @ifname: interface name, e.g., wlan0
1189 * Returns: Pointer to private data, %NULL on failure
1190 */
1191 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1192 {
1193 struct wpa_driver_nl80211_data *drv;
1194
1195 drv = os_zalloc(sizeof(*drv));
1196 if (drv == NULL)
1197 return NULL;
1198 drv->ctx = ctx;
1199 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1200 drv->monitor_ifidx = -1;
1201 drv->monitor_sock = -1;
1202 drv->link_event_sock = -1;
1203 drv->ioctl_sock = -1;
1204
1205 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1206 os_free(drv);
1207 return NULL;
1208 }
1209
1210 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1211
1212 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1213 if (drv->ioctl_sock < 0) {
1214 perror("socket(PF_INET,SOCK_DGRAM)");
1215 goto failed;
1216 }
1217
1218 if (wpa_driver_nl80211_init_link_events(drv) ||
1219 wpa_driver_nl80211_finish_drv_init(drv))
1220 goto failed;
1221
1222 return drv;
1223
1224 failed:
1225 if (drv->link_event_sock >= 0) {
1226 eloop_unregister_read_sock(drv->link_event_sock);
1227 close(drv->link_event_sock);
1228 }
1229 if (drv->ioctl_sock >= 0)
1230 close(drv->ioctl_sock);
1231
1232 genl_family_put(drv->nl80211);
1233 nl_cache_free(drv->nl_cache);
1234 nl_handle_destroy(drv->nl_handle);
1235 nl_cb_put(drv->nl_cb);
1236
1237 os_free(drv);
1238 return NULL;
1239 }
1240
1241
1242 static int
1243 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1244 {
1245 drv->ifindex = if_nametoindex(drv->ifname);
1246
1247 #ifndef HOSTAPD
1248 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1249 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1250 "use managed mode");
1251 }
1252
1253 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1254 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1255 "UP", drv->ifname);
1256 return -1;
1257 }
1258
1259 wpa_driver_nl80211_capa(drv);
1260
1261 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1262 #endif /* HOSTAPD */
1263
1264 return 0;
1265 }
1266
1267
1268 #ifdef HOSTAPD
1269 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1270 {
1271 struct i802_bss *bss, *prev;
1272 bss = drv->bss.next;
1273 while (bss) {
1274 prev = bss;
1275 bss = bss->next;
1276 os_free(bss);
1277 }
1278 }
1279 #endif /* HOSTAPD */
1280
1281
1282 /**
1283 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1284 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1285 *
1286 * Shut down driver interface and processing of driver events. Free
1287 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1288 */
1289 static void wpa_driver_nl80211_deinit(void *priv)
1290 {
1291 struct wpa_driver_nl80211_data *drv = priv;
1292
1293 #if defined(CONFIG_AP) || defined(HOSTAPD)
1294 if (drv->monitor_ifidx >= 0)
1295 nl80211_remove_iface(drv, drv->monitor_ifidx);
1296 if (drv->monitor_sock >= 0) {
1297 eloop_unregister_read_sock(drv->monitor_sock);
1298 close(drv->monitor_sock);
1299 }
1300 #endif /* CONFIG_AP || HOSTAPD */
1301
1302 #ifdef HOSTAPD
1303 if (drv->last_freq_ht) {
1304 /* Clear HT flags from the driver */
1305 struct hostapd_freq_params freq;
1306 os_memset(&freq, 0, sizeof(freq));
1307 freq.freq = drv->last_freq;
1308 i802_set_freq(priv, &freq);
1309 }
1310
1311 i802_del_beacon(drv);
1312
1313 if (drv->eapol_sock >= 0) {
1314 eloop_unregister_read_sock(drv->eapol_sock);
1315 close(drv->eapol_sock);
1316 }
1317
1318 if (drv->if_indices != drv->default_if_indices)
1319 os_free(drv->if_indices);
1320
1321 wpa_driver_nl80211_free_bss(drv);
1322 #else /* HOSTAPD */
1323 #ifndef NO_WEXT
1324 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1325 #endif /* NO_WEXT */
1326
1327 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1328
1329 if (drv->link_event_sock >= 0) {
1330 eloop_unregister_read_sock(drv->link_event_sock);
1331 close(drv->link_event_sock);
1332 }
1333 #endif /* HOSTAPD */
1334
1335 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1336
1337 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1338 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1339
1340 if (drv->ioctl_sock >= 0)
1341 close(drv->ioctl_sock);
1342
1343 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1344 genl_family_put(drv->nl80211);
1345 nl_cache_free(drv->nl_cache);
1346 nl_handle_destroy(drv->nl_handle);
1347 nl_cb_put(drv->nl_cb);
1348
1349 os_free(drv);
1350 }
1351
1352
1353 /**
1354 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1355 * @eloop_ctx: Driver private data
1356 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1357 *
1358 * This function can be used as registered timeout when starting a scan to
1359 * generate a scan completed event if the driver does not report this.
1360 */
1361 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1362 {
1363 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1364 if (drv->ap_scan_as_station) {
1365 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1366 drv->ap_scan_as_station = 0;
1367 }
1368 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1369 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1370 }
1371
1372
1373 /**
1374 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1375 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1376 * @params: Scan parameters
1377 * Returns: 0 on success, -1 on failure
1378 */
1379 static int wpa_driver_nl80211_scan(void *priv,
1380 struct wpa_driver_scan_params *params)
1381 {
1382 struct wpa_driver_nl80211_data *drv = priv;
1383 int ret = 0, timeout;
1384 struct nl_msg *msg, *ssids, *freqs;
1385 size_t i;
1386
1387 msg = nlmsg_alloc();
1388 ssids = nlmsg_alloc();
1389 freqs = nlmsg_alloc();
1390 if (!msg || !ssids || !freqs) {
1391 nlmsg_free(msg);
1392 nlmsg_free(ssids);
1393 nlmsg_free(freqs);
1394 return -1;
1395 }
1396
1397 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1398 NL80211_CMD_TRIGGER_SCAN, 0);
1399
1400 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1401
1402 for (i = 0; i < params->num_ssids; i++) {
1403 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1404 params->ssids[i].ssid);
1405 }
1406 if (params->num_ssids)
1407 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1408
1409 if (params->extra_ies) {
1410 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1411 params->extra_ies);
1412 }
1413
1414 if (params->freqs) {
1415 for (i = 0; params->freqs[i]; i++)
1416 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1417 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1418 }
1419
1420 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1421 msg = NULL;
1422 if (ret) {
1423 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1424 "(%s)", ret, strerror(-ret));
1425 #ifdef HOSTAPD
1426 if (drv->nlmode == NL80211_IFTYPE_AP) {
1427 /*
1428 * mac80211 does not allow scan requests in AP mode, so
1429 * try to do this in station mode.
1430 */
1431 if (wpa_driver_nl80211_set_mode(drv,
1432 IEEE80211_MODE_INFRA))
1433 goto nla_put_failure;
1434
1435 if (wpa_driver_nl80211_scan(drv, params)) {
1436 wpa_driver_nl80211_set_mode(drv,
1437 IEEE80211_MODE_AP);
1438 goto nla_put_failure;
1439 }
1440
1441 /* Restore AP mode when processing scan results */
1442 drv->ap_scan_as_station = 1;
1443 ret = 0;
1444 } else
1445 goto nla_put_failure;
1446 #else /* HOSTAPD */
1447 goto nla_put_failure;
1448 #endif /* HOSTAPD */
1449 }
1450
1451 /* Not all drivers generate "scan completed" wireless event, so try to
1452 * read results after a timeout. */
1453 timeout = 10;
1454 if (drv->scan_complete_events) {
1455 /*
1456 * The driver seems to deliver events to notify when scan is
1457 * complete, so use longer timeout to avoid race conditions
1458 * with scanning and following association request.
1459 */
1460 timeout = 30;
1461 }
1462 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1463 "seconds", ret, timeout);
1464 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1465 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1466 drv, drv->ctx);
1467
1468 nla_put_failure:
1469 nlmsg_free(ssids);
1470 nlmsg_free(msg);
1471 nlmsg_free(freqs);
1472 return ret;
1473 }
1474
1475
1476 static int bss_info_handler(struct nl_msg *msg, void *arg)
1477 {
1478 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1479 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1480 struct nlattr *bss[NL80211_BSS_MAX + 1];
1481 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1482 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1483 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1484 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1485 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1486 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1487 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1488 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1489 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1490 };
1491 struct wpa_scan_results *res = arg;
1492 struct wpa_scan_res **tmp;
1493 struct wpa_scan_res *r;
1494 const u8 *ie;
1495 size_t ie_len;
1496
1497 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1498 genlmsg_attrlen(gnlh, 0), NULL);
1499 if (!tb[NL80211_ATTR_BSS])
1500 return NL_SKIP;
1501 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1502 bss_policy))
1503 return NL_SKIP;
1504 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1505 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1506 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1507 } else {
1508 ie = NULL;
1509 ie_len = 0;
1510 }
1511
1512 r = os_zalloc(sizeof(*r) + ie_len);
1513 if (r == NULL)
1514 return NL_SKIP;
1515 if (bss[NL80211_BSS_BSSID])
1516 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1517 ETH_ALEN);
1518 if (bss[NL80211_BSS_FREQUENCY])
1519 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1520 if (bss[NL80211_BSS_BEACON_INTERVAL])
1521 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1522 if (bss[NL80211_BSS_CAPABILITY])
1523 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1524 r->flags |= WPA_SCAN_NOISE_INVALID;
1525 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1526 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1527 r->level /= 100; /* mBm to dBm */
1528 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1529 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1530 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1531 r->flags |= WPA_SCAN_LEVEL_INVALID;
1532 } else
1533 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1534 if (bss[NL80211_BSS_TSF])
1535 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1536 r->ie_len = ie_len;
1537 if (ie)
1538 os_memcpy(r + 1, ie, ie_len);
1539
1540 tmp = os_realloc(res->res,
1541 (res->num + 1) * sizeof(struct wpa_scan_res *));
1542 if (tmp == NULL) {
1543 os_free(r);
1544 return NL_SKIP;
1545 }
1546 tmp[res->num++] = r;
1547 res->res = tmp;
1548
1549 return NL_SKIP;
1550 }
1551
1552
1553 /**
1554 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1555 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1556 * Returns: Scan results on success, -1 on failure
1557 */
1558 static struct wpa_scan_results *
1559 wpa_driver_nl80211_get_scan_results(void *priv)
1560 {
1561 struct wpa_driver_nl80211_data *drv = priv;
1562 struct nl_msg *msg;
1563 struct wpa_scan_results *res;
1564 int ret;
1565
1566 res = os_zalloc(sizeof(*res));
1567 if (res == NULL)
1568 return 0;
1569 msg = nlmsg_alloc();
1570 if (!msg)
1571 goto nla_put_failure;
1572
1573 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1574 NL80211_CMD_GET_SCAN, 0);
1575 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1576
1577 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1578 msg = NULL;
1579 if (ret == 0) {
1580 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1581 (unsigned long) res->num);
1582 return res;
1583 }
1584 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1585 "(%s)", ret, strerror(-ret));
1586 nla_put_failure:
1587 nlmsg_free(msg);
1588 wpa_scan_results_free(res);
1589 return NULL;
1590 }
1591
1592
1593 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1594 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1595 const u8 *seq, size_t seq_len,
1596 const u8 *key, size_t key_len)
1597 {
1598 struct nl_msg *msg;
1599 int ret;
1600
1601 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1602 "set_tx=%d seq_len=%lu key_len=%lu",
1603 __func__, ifindex, alg, addr, key_idx, set_tx,
1604 (unsigned long) seq_len, (unsigned long) key_len);
1605
1606 msg = nlmsg_alloc();
1607 if (!msg)
1608 return -ENOMEM;
1609
1610 if (alg == WPA_ALG_NONE) {
1611 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1612 0, NL80211_CMD_DEL_KEY, 0);
1613 } else {
1614 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1615 0, NL80211_CMD_NEW_KEY, 0);
1616 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1617 switch (alg) {
1618 case WPA_ALG_WEP:
1619 if (key_len == 5)
1620 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1621 0x000FAC01);
1622 else
1623 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1624 0x000FAC05);
1625 break;
1626 case WPA_ALG_TKIP:
1627 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1628 break;
1629 case WPA_ALG_CCMP:
1630 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1631 break;
1632 case WPA_ALG_IGTK:
1633 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1634 break;
1635 default:
1636 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1637 "algorithm %d", __func__, alg);
1638 nlmsg_free(msg);
1639 return -1;
1640 }
1641 }
1642
1643 if (seq)
1644 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1645
1646 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1647 {
1648 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1649 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1650 }
1651 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1652 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1653
1654 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1655 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1656 ret = 0;
1657 if (ret)
1658 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1659 ret, strerror(-ret));
1660
1661 /*
1662 * If we failed or don't need to set the default TX key (below),
1663 * we're done here.
1664 */
1665 if (ret || !set_tx || alg == WPA_ALG_NONE)
1666 return ret;
1667 #ifdef HOSTAPD /* FIX: is this needed? */
1668 if (addr)
1669 return ret;
1670 #endif /* HOSTAPD */
1671
1672 msg = nlmsg_alloc();
1673 if (!msg)
1674 return -ENOMEM;
1675
1676 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1677 0, NL80211_CMD_SET_KEY, 0);
1678 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1679 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1680 if (alg == WPA_ALG_IGTK)
1681 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1682 else
1683 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1684
1685 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1686 if (ret == -ENOENT)
1687 ret = 0;
1688 if (ret)
1689 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1690 "err=%d %s)", ret, strerror(-ret));
1691 return ret;
1692
1693 nla_put_failure:
1694 return -ENOBUFS;
1695 }
1696
1697
1698 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1699 const u8 *addr, int key_idx,
1700 int set_tx, const u8 *seq,
1701 size_t seq_len,
1702 const u8 *key, size_t key_len)
1703 {
1704 struct wpa_driver_nl80211_data *drv = priv;
1705 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1706 seq_len, key, key_len);
1707 }
1708
1709
1710 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1711 const u8 *addr, int cmd, u16 reason_code)
1712 {
1713 int ret = -1;
1714 struct nl_msg *msg;
1715
1716 msg = nlmsg_alloc();
1717 if (!msg)
1718 return -1;
1719
1720 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1721
1722 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1723 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1724 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1725
1726 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1727 msg = NULL;
1728 if (ret) {
1729 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1730 "(%s)", ret, strerror(-ret));
1731 goto nla_put_failure;
1732 }
1733 ret = 0;
1734
1735 nla_put_failure:
1736 nlmsg_free(msg);
1737 return ret;
1738 }
1739
1740
1741 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1742 int reason_code)
1743 {
1744 struct wpa_driver_nl80211_data *drv = priv;
1745 wpa_printf(MSG_DEBUG, "%s", __func__);
1746 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1747 reason_code);
1748 }
1749
1750
1751 static int wpa_driver_nl80211_disassociate(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 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1757 reason_code);
1758 }
1759
1760
1761 static int wpa_driver_nl80211_authenticate(
1762 void *priv, struct wpa_driver_auth_params *params)
1763 {
1764 struct wpa_driver_nl80211_data *drv = priv;
1765 int ret = -1, i;
1766 struct nl_msg *msg;
1767 enum nl80211_auth_type type;
1768
1769 drv->associated = 0;
1770
1771 msg = nlmsg_alloc();
1772 if (!msg)
1773 return -1;
1774
1775 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1776 drv->ifindex);
1777
1778 for (i = 0; i < 4; i++) {
1779 if (!params->wep_key[i])
1780 continue;
1781 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1782 i == params->wep_tx_keyidx, NULL, 0,
1783 params->wep_key[i],
1784 params->wep_key_len[i]);
1785 }
1786
1787 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1788 NL80211_CMD_AUTHENTICATE, 0);
1789
1790 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1791 if (params->bssid) {
1792 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1793 MAC2STR(params->bssid));
1794 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1795 }
1796 if (params->freq) {
1797 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1798 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1799 }
1800 if (params->ssid) {
1801 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1802 params->ssid, params->ssid_len);
1803 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1804 params->ssid);
1805 }
1806 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1807 if (params->ie)
1808 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1809 /*
1810 * TODO: if multiple auth_alg options enabled, try them one by one if
1811 * the AP rejects authentication due to unknown auth alg
1812 */
1813 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1814 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1815 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1816 type = NL80211_AUTHTYPE_SHARED_KEY;
1817 else if (params->auth_alg & AUTH_ALG_LEAP)
1818 type = NL80211_AUTHTYPE_NETWORK_EAP;
1819 else if (params->auth_alg & AUTH_ALG_FT)
1820 type = NL80211_AUTHTYPE_FT;
1821 else
1822 goto nla_put_failure;
1823 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1824 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1825
1826 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1827 msg = NULL;
1828 if (ret) {
1829 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1830 "(%s)", ret, strerror(-ret));
1831 goto nla_put_failure;
1832 }
1833 ret = 0;
1834 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1835 "successfully");
1836
1837 nla_put_failure:
1838 nlmsg_free(msg);
1839 return ret;
1840 }
1841
1842
1843 #if defined(CONFIG_AP) || defined(HOSTAPD)
1844
1845 struct phy_info_arg {
1846 u16 *num_modes;
1847 struct hostapd_hw_modes *modes;
1848 };
1849
1850 static int phy_info_handler(struct nl_msg *msg, void *arg)
1851 {
1852 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1853 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1854 struct phy_info_arg *phy_info = arg;
1855
1856 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1857
1858 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1859 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1860 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1861 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1862 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1863 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1864 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1865 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1866 };
1867
1868 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1869 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1870 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1871 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1872 };
1873
1874 struct nlattr *nl_band;
1875 struct nlattr *nl_freq;
1876 struct nlattr *nl_rate;
1877 int rem_band, rem_freq, rem_rate;
1878 struct hostapd_hw_modes *mode;
1879 int idx, mode_is_set;
1880
1881 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1882 genlmsg_attrlen(gnlh, 0), NULL);
1883
1884 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1885 return NL_SKIP;
1886
1887 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1888 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1889 if (!mode)
1890 return NL_SKIP;
1891 phy_info->modes = mode;
1892
1893 mode_is_set = 0;
1894
1895 mode = &phy_info->modes[*(phy_info->num_modes)];
1896 memset(mode, 0, sizeof(*mode));
1897 *(phy_info->num_modes) += 1;
1898
1899 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1900 nla_len(nl_band), NULL);
1901
1902 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1903 mode->ht_capab = nla_get_u16(
1904 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1905 }
1906
1907 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1908 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1909 nla_len(nl_freq), freq_policy);
1910 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1911 continue;
1912 mode->num_channels++;
1913 }
1914
1915 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1916 if (!mode->channels)
1917 return NL_SKIP;
1918
1919 idx = 0;
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
1927 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1928 mode->channels[idx].flag = 0;
1929
1930 if (!mode_is_set) {
1931 /* crude heuristic */
1932 if (mode->channels[idx].freq < 4000)
1933 mode->mode = HOSTAPD_MODE_IEEE80211B;
1934 else
1935 mode->mode = HOSTAPD_MODE_IEEE80211A;
1936 mode_is_set = 1;
1937 }
1938
1939 /* crude heuristic */
1940 if (mode->channels[idx].freq < 4000)
1941 if (mode->channels[idx].freq == 2484)
1942 mode->channels[idx].chan = 14;
1943 else
1944 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1945 else
1946 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1947
1948 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1949 mode->channels[idx].flag |=
1950 HOSTAPD_CHAN_DISABLED;
1951 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1952 mode->channels[idx].flag |=
1953 HOSTAPD_CHAN_PASSIVE_SCAN;
1954 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1955 mode->channels[idx].flag |=
1956 HOSTAPD_CHAN_NO_IBSS;
1957 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1958 mode->channels[idx].flag |=
1959 HOSTAPD_CHAN_RADAR;
1960
1961 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1962 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1963 mode->channels[idx].max_tx_power =
1964 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1965
1966 idx++;
1967 }
1968
1969 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1970 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1971 nla_len(nl_rate), rate_policy);
1972 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1973 continue;
1974 mode->num_rates++;
1975 }
1976
1977 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1978 if (!mode->rates)
1979 return NL_SKIP;
1980
1981 idx = 0;
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->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1989
1990 /* crude heuristic */
1991 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1992 mode->rates[idx].rate > 200)
1993 mode->mode = HOSTAPD_MODE_IEEE80211G;
1994
1995 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1996 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1997
1998 idx++;
1999 }
2000 }
2001
2002 return NL_SKIP;
2003 }
2004
2005 static struct hostapd_hw_modes *
2006 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2007 {
2008 u16 m;
2009 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2010 int i, mode11g_idx = -1;
2011
2012 /* If only 802.11g mode is included, use it to construct matching
2013 * 802.11b mode data. */
2014
2015 for (m = 0; m < *num_modes; m++) {
2016 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2017 return modes; /* 802.11b already included */
2018 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2019 mode11g_idx = m;
2020 }
2021
2022 if (mode11g_idx < 0)
2023 return modes; /* 2.4 GHz band not supported at all */
2024
2025 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2026 if (nmodes == NULL)
2027 return modes; /* Could not add 802.11b mode */
2028
2029 mode = &nmodes[*num_modes];
2030 os_memset(mode, 0, sizeof(*mode));
2031 (*num_modes)++;
2032 modes = nmodes;
2033
2034 mode->mode = HOSTAPD_MODE_IEEE80211B;
2035
2036 mode11g = &modes[mode11g_idx];
2037 mode->num_channels = mode11g->num_channels;
2038 mode->channels = os_malloc(mode11g->num_channels *
2039 sizeof(struct hostapd_channel_data));
2040 if (mode->channels == NULL) {
2041 (*num_modes)--;
2042 return modes; /* Could not add 802.11b mode */
2043 }
2044 os_memcpy(mode->channels, mode11g->channels,
2045 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2046
2047 mode->num_rates = 0;
2048 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2049 if (mode->rates == NULL) {
2050 os_free(mode->channels);
2051 (*num_modes)--;
2052 return modes; /* Could not add 802.11b mode */
2053 }
2054
2055 for (i = 0; i < mode11g->num_rates; i++) {
2056 if (mode11g->rates[i].rate > 110 ||
2057 mode11g->rates[i].flags &
2058 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2059 continue;
2060 mode->rates[mode->num_rates] = mode11g->rates[i];
2061 mode->num_rates++;
2062 if (mode->num_rates == 4)
2063 break;
2064 }
2065
2066 if (mode->num_rates == 0) {
2067 os_free(mode->channels);
2068 os_free(mode->rates);
2069 (*num_modes)--;
2070 return modes; /* No 802.11b rates */
2071 }
2072
2073 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2074 "information");
2075
2076 return modes;
2077 }
2078
2079
2080 static struct hostapd_hw_modes *
2081 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2082 {
2083 struct wpa_driver_nl80211_data *drv = priv;
2084 struct nl_msg *msg;
2085 struct phy_info_arg result = {
2086 .num_modes = num_modes,
2087 .modes = NULL,
2088 };
2089
2090 *num_modes = 0;
2091 *flags = 0;
2092
2093 msg = nlmsg_alloc();
2094 if (!msg)
2095 return NULL;
2096
2097 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2098 0, NL80211_CMD_GET_WIPHY, 0);
2099
2100 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2101
2102 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2103 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2104 nla_put_failure:
2105 return NULL;
2106 }
2107
2108
2109 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2110 const void *data, size_t len,
2111 int encrypt)
2112 {
2113 __u8 rtap_hdr[] = {
2114 0x00, 0x00, /* radiotap version */
2115 0x0e, 0x00, /* radiotap length */
2116 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2117 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2118 0x00, /* padding */
2119 0x00, 0x00, /* RX and TX flags to indicate that */
2120 0x00, 0x00, /* this is the injected frame directly */
2121 };
2122 struct iovec iov[2] = {
2123 {
2124 .iov_base = &rtap_hdr,
2125 .iov_len = sizeof(rtap_hdr),
2126 },
2127 {
2128 .iov_base = (void *) data,
2129 .iov_len = len,
2130 }
2131 };
2132 struct msghdr msg = {
2133 .msg_name = NULL,
2134 .msg_namelen = 0,
2135 .msg_iov = iov,
2136 .msg_iovlen = 2,
2137 .msg_control = NULL,
2138 .msg_controllen = 0,
2139 .msg_flags = 0,
2140 };
2141
2142 if (encrypt)
2143 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2144
2145 return sendmsg(drv->monitor_sock, &msg, 0);
2146 }
2147
2148
2149 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2150 size_t data_len)
2151 {
2152 struct wpa_driver_nl80211_data *drv = priv;
2153 struct ieee80211_mgmt *mgmt;
2154 int do_not_encrypt = 0;
2155 u16 fc;
2156
2157 mgmt = (struct ieee80211_mgmt *) data;
2158 fc = le_to_host16(mgmt->frame_control);
2159
2160 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2161 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2162 /*
2163 * Only one of the authentication frame types is encrypted.
2164 * In order for static WEP encryption to work properly (i.e.,
2165 * to not encrypt the frame), we need to tell mac80211 about
2166 * the frames that must not be encrypted.
2167 */
2168 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2169 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2170 if (auth_alg == WLAN_AUTH_OPEN ||
2171 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2172 do_not_encrypt = 1;
2173 }
2174
2175 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2176 !do_not_encrypt);
2177 }
2178
2179
2180 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2181 const u8 *head, size_t head_len,
2182 const u8 *tail, size_t tail_len,
2183 int dtim_period)
2184 {
2185 struct wpa_driver_nl80211_data *drv = priv;
2186 struct nl_msg *msg;
2187 u8 cmd = NL80211_CMD_NEW_BEACON;
2188 int ret;
2189 int beacon_set;
2190 #ifdef HOSTAPD
2191 struct i802_bss *bss;
2192
2193 bss = get_bss(drv, ifindex);
2194 if (bss == NULL)
2195 return -ENOENT;
2196 beacon_set = bss->beacon_set;
2197 #else /* HOSTAPD */
2198 beacon_set = drv->beacon_set;
2199 #endif /* HOSTAPD */
2200
2201 msg = nlmsg_alloc();
2202 if (!msg)
2203 return -ENOMEM;
2204
2205 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2206 beacon_set);
2207 if (beacon_set)
2208 cmd = NL80211_CMD_SET_BEACON;
2209
2210 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2211 0, cmd, 0);
2212 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2213 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2214 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2215 if (!drv->beacon_int)
2216 drv->beacon_int = 100;
2217 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2218 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2219
2220 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2221 if (ret) {
2222 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2223 ret, strerror(-ret));
2224 } else {
2225 #ifdef HOSTAPD
2226 bss->beacon_set = 1;
2227 #else /* HOSTAPD */
2228 drv->beacon_set = 1;
2229 #endif /* HOSTAPD */
2230 }
2231 return ret;
2232 nla_put_failure:
2233 return -ENOBUFS;
2234 }
2235
2236
2237 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2238 {
2239 struct wpa_driver_nl80211_data *drv = priv;
2240 struct nl_msg *msg;
2241
2242 drv->beacon_int = value;
2243
2244 #ifdef HOSTAPD
2245 if (!drv->bss.beacon_set)
2246 return 0;
2247 #else /* HOSTAPD */
2248 if (!drv->beacon_set)
2249 return 0;
2250 #endif /* HOSTAPD */
2251
2252 msg = nlmsg_alloc();
2253 if (!msg)
2254 return -ENOMEM;
2255
2256 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2257 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2258 0, NL80211_CMD_SET_BEACON, 0);
2259 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2260
2261 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2262
2263 return send_and_recv_msgs(drv, msg, NULL, NULL);
2264 nla_put_failure:
2265 return -ENOBUFS;
2266 }
2267
2268
2269 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2270 int freq, int ht_enabled,
2271 int sec_channel_offset)
2272 {
2273 struct nl_msg *msg;
2274 int ret;
2275
2276 msg = nlmsg_alloc();
2277 if (!msg)
2278 return -1;
2279
2280 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2281 NL80211_CMD_SET_WIPHY, 0);
2282
2283 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2284 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2285 if (ht_enabled) {
2286 switch (sec_channel_offset) {
2287 case -1:
2288 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2289 NL80211_CHAN_HT40MINUS);
2290 break;
2291 case 1:
2292 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2293 NL80211_CHAN_HT40PLUS);
2294 break;
2295 default:
2296 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2297 NL80211_CHAN_HT20);
2298 break;
2299 }
2300 }
2301
2302 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2303 if (ret == 0)
2304 return 0;
2305 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2306 "%d (%s)", freq, ret, strerror(-ret));
2307 nla_put_failure:
2308 return -1;
2309 }
2310
2311 #endif /* CONFIG_AP || HOSTAPD */
2312
2313
2314 #ifdef CONFIG_AP
2315
2316 static int wpa_driver_nl80211_set_beacon(void *priv,
2317 const u8 *head, size_t head_len,
2318 const u8 *tail, size_t tail_len,
2319 int dtim_period)
2320 {
2321 struct wpa_driver_nl80211_data *drv = priv;
2322 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2323 head, head_len,
2324 tail, tail_len,
2325 dtim_period);
2326 }
2327
2328 #endif /* CONFIG_AP */
2329
2330 #if defined(CONFIG_AP) || defined(HOSTAPD)
2331
2332 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2333 int ifidx)
2334 {
2335 struct nl_msg *msg;
2336
2337 #ifdef HOSTAPD
2338 /* stop listening for EAPOL on this interface */
2339 del_ifidx(drv, ifidx);
2340 #endif /* HOSTAPD */
2341
2342 msg = nlmsg_alloc();
2343 if (!msg)
2344 goto nla_put_failure;
2345
2346 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2347 0, NL80211_CMD_DEL_INTERFACE, 0);
2348 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2349
2350 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2351 return;
2352 nla_put_failure:
2353 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2354 ifidx);
2355 }
2356
2357
2358 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2359 const char *ifname, enum nl80211_iftype iftype,
2360 const u8 *addr)
2361 {
2362 struct nl_msg *msg, *flags = NULL;
2363 int ifidx;
2364 int ret = -ENOBUFS;
2365
2366 msg = nlmsg_alloc();
2367 if (!msg)
2368 return -1;
2369
2370 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2371 0, NL80211_CMD_NEW_INTERFACE, 0);
2372 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2373 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2374 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2375
2376 if (iftype == NL80211_IFTYPE_MONITOR) {
2377 int err;
2378
2379 flags = nlmsg_alloc();
2380 if (!flags)
2381 goto nla_put_failure;
2382
2383 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2384
2385 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2386
2387 nlmsg_free(flags);
2388
2389 if (err)
2390 goto nla_put_failure;
2391 }
2392
2393 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2394 if (ret) {
2395 nla_put_failure:
2396 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2397 ifname);
2398 return ret;
2399 }
2400
2401 ifidx = if_nametoindex(ifname);
2402
2403 if (ifidx <= 0)
2404 return -1;
2405
2406 #ifdef HOSTAPD
2407 /* start listening for EAPOL on this interface */
2408 add_ifidx(drv, ifidx);
2409
2410 if (addr && iftype == NL80211_IFTYPE_AP &&
2411 set_ifhwaddr(drv, ifname, addr)) {
2412 nl80211_remove_iface(drv, ifidx);
2413 return -1;
2414 }
2415 #endif /* HOSTAPD */
2416
2417 return ifidx;
2418 }
2419
2420 #endif /* CONFIG_AP || HOSTAPD */
2421
2422 #ifdef CONFIG_AP
2423
2424 void ap_tx_status(void *ctx, const u8 *addr,
2425 const u8 *buf, size_t len, int ack);
2426 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2427 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2428 struct hostapd_frame_info *fi);
2429 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2430
2431 #endif /* CONFIG_AP */
2432
2433 #if defined(CONFIG_AP) || defined(HOSTAPD)
2434
2435 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2436 {
2437 struct ieee80211_hdr *hdr;
2438 u16 fc, type, stype;
2439
2440 hdr = (struct ieee80211_hdr *) buf;
2441 fc = le_to_host16(hdr->frame_control);
2442
2443 type = WLAN_FC_GET_TYPE(fc);
2444 stype = WLAN_FC_GET_STYPE(fc);
2445
2446 switch (type) {
2447 case WLAN_FC_TYPE_MGMT:
2448 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2449 ok ? "ACK" : "fail");
2450 #ifdef HOSTAPD
2451 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2452 #else /* HOSTAPD */
2453 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2454 #endif /* HOSTAPD */
2455 break;
2456 case WLAN_FC_TYPE_CTRL:
2457 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2458 ok ? "ACK" : "fail");
2459 break;
2460 case WLAN_FC_TYPE_DATA:
2461 #ifdef HOSTAPD
2462 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2463 #else /* HOSTAPD */
2464 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2465 #endif /* HOSTAPD */
2466 break;
2467 default:
2468 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2469 type);
2470 break;
2471 }
2472 }
2473
2474
2475 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2476 u8 *buf, size_t len,
2477 struct hostapd_frame_info *hfi,
2478 enum ieee80211_msg_type msg_type)
2479 {
2480 struct ieee80211_hdr *hdr;
2481 u16 fc, type, stype;
2482 size_t data_len = len;
2483 u8 *bssid;
2484 void *ctx = drv->ctx;
2485 #ifdef HOSTAPD
2486 struct hostapd_iface *iface = drv->hapd->iface;
2487 struct hostapd_data *hapd = NULL;
2488 int broadcast_bssid = 0;
2489 size_t i;
2490 #endif /* HOSTAPD */
2491
2492 /*
2493 * PS-Poll frames are 16 bytes. All other frames are
2494 * 24 bytes or longer.
2495 */
2496 if (len < 16)
2497 return;
2498
2499 hdr = (struct ieee80211_hdr *) buf;
2500 fc = le_to_host16(hdr->frame_control);
2501
2502 type = WLAN_FC_GET_TYPE(fc);
2503 stype = WLAN_FC_GET_STYPE(fc);
2504
2505 switch (type) {
2506 case WLAN_FC_TYPE_DATA:
2507 if (len < 24)
2508 return;
2509 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2510 case WLAN_FC_TODS:
2511 bssid = hdr->addr1;
2512 break;
2513 case WLAN_FC_FROMDS:
2514 bssid = hdr->addr2;
2515 break;
2516 default:
2517 /* discard */
2518 return;
2519 }
2520 break;
2521 case WLAN_FC_TYPE_CTRL:
2522 /* discard non-ps-poll frames */
2523 if (stype != WLAN_FC_STYPE_PSPOLL)
2524 return;
2525 bssid = hdr->addr1;
2526 break;
2527 case WLAN_FC_TYPE_MGMT:
2528 bssid = hdr->addr3;
2529 break;
2530 default:
2531 /* discard */
2532 return;
2533 }
2534
2535 #ifdef HOSTAPD
2536 /* find interface frame belongs to */
2537 for (i = 0; i < iface->num_bss; i++) {
2538 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
2539 hapd = iface->bss[i];
2540 break;
2541 }
2542 }
2543
2544 if (hapd == NULL) {
2545 hapd = iface->bss[0];
2546
2547 if (bssid[0] != 0xff || bssid[1] != 0xff ||
2548 bssid[2] != 0xff || bssid[3] != 0xff ||
2549 bssid[4] != 0xff || bssid[5] != 0xff) {
2550 /*
2551 * Unknown BSSID - drop frame if this is not from
2552 * passive scanning or a beacon (at least ProbeReq
2553 * frames to other APs may be allowed through RX
2554 * filtering in the wlan hw/driver)
2555 */
2556 if ((type != WLAN_FC_TYPE_MGMT ||
2557 stype != WLAN_FC_STYPE_BEACON))
2558 return;
2559 } else
2560 broadcast_bssid = 1;
2561 }
2562 ctx = hapd;
2563 #endif /* HOSTAPD */
2564
2565 switch (msg_type) {
2566 case ieee80211_msg_normal:
2567 /* continue processing */
2568 break;
2569 case ieee80211_msg_tx_callback_ack:
2570 handle_tx_callback(ctx, buf, data_len, 1);
2571 return;
2572 case ieee80211_msg_tx_callback_fail:
2573 handle_tx_callback(ctx, buf, data_len, 0);
2574 return;
2575 }
2576
2577 switch (type) {
2578 case WLAN_FC_TYPE_MGMT:
2579 if (stype != WLAN_FC_STYPE_BEACON &&
2580 stype != WLAN_FC_STYPE_PROBE_REQ)
2581 wpa_printf(MSG_MSGDUMP, "MGMT");
2582 #ifdef HOSTAPD
2583 if (broadcast_bssid) {
2584 for (i = 0; i < iface->num_bss; i++)
2585 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
2586 stype, hfi);
2587 } else
2588 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
2589 #else /* HOSTAPD */
2590 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2591 #endif /* HOSTAPD */
2592 break;
2593 case WLAN_FC_TYPE_CTRL:
2594 /* can only get here with PS-Poll frames */
2595 wpa_printf(MSG_DEBUG, "CTRL");
2596 #ifdef HOSTAPD
2597 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2598 #else /* HOSTAPD */
2599 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2600 #endif /* HOSTAPD */
2601 break;
2602 case WLAN_FC_TYPE_DATA:
2603 #ifdef HOSTAPD
2604 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2605 #else /* HOSTAPD */
2606 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2607 #endif /* HOSTAPD */
2608 break;
2609 }
2610 }
2611
2612
2613 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2614 {
2615 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2616 int len;
2617 unsigned char buf[3000];
2618 struct ieee80211_radiotap_iterator iter;
2619 int ret;
2620 struct hostapd_frame_info hfi;
2621 int injected = 0, failed = 0, msg_type, rxflags = 0;
2622
2623 len = recv(sock, buf, sizeof(buf), 0);
2624 if (len < 0) {
2625 perror("recv");
2626 return;
2627 }
2628
2629 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2630 printf("received invalid radiotap frame\n");
2631 return;
2632 }
2633
2634 memset(&hfi, 0, sizeof(hfi));
2635
2636 while (1) {
2637 ret = ieee80211_radiotap_iterator_next(&iter);
2638 if (ret == -ENOENT)
2639 break;
2640 if (ret) {
2641 printf("received invalid radiotap frame (%d)\n", ret);
2642 return;
2643 }
2644 switch (iter.this_arg_index) {
2645 case IEEE80211_RADIOTAP_FLAGS:
2646 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2647 len -= 4;
2648 break;
2649 case IEEE80211_RADIOTAP_RX_FLAGS:
2650 rxflags = 1;
2651 break;
2652 case IEEE80211_RADIOTAP_TX_FLAGS:
2653 injected = 1;
2654 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2655 IEEE80211_RADIOTAP_F_TX_FAIL;
2656 break;
2657 case IEEE80211_RADIOTAP_DATA_RETRIES:
2658 break;
2659 case IEEE80211_RADIOTAP_CHANNEL:
2660 /* TODO convert from freq/flags to channel number
2661 hfi.channel = XXX;
2662 hfi.phytype = XXX;
2663 */
2664 break;
2665 case IEEE80211_RADIOTAP_RATE:
2666 hfi.datarate = *iter.this_arg * 5;
2667 break;
2668 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2669 hfi.ssi_signal = *iter.this_arg;
2670 break;
2671 }
2672 }
2673
2674 if (rxflags && injected)
2675 return;
2676
2677 if (!injected)
2678 msg_type = ieee80211_msg_normal;
2679 else if (failed)
2680 msg_type = ieee80211_msg_tx_callback_fail;
2681 else
2682 msg_type = ieee80211_msg_tx_callback_ack;
2683
2684 handle_frame(drv, buf + iter.max_length,
2685 len - iter.max_length, &hfi, msg_type);
2686 }
2687
2688
2689 /*
2690 * we post-process the filter code later and rewrite
2691 * this to the offset to the last instruction
2692 */
2693 #define PASS 0xFF
2694 #define FAIL 0xFE
2695
2696 static struct sock_filter msock_filter_insns[] = {
2697 /*
2698 * do a little-endian load of the radiotap length field
2699 */
2700 /* load lower byte into A */
2701 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2702 /* put it into X (== index register) */
2703 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2704 /* load upper byte into A */
2705 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2706 /* left-shift it by 8 */
2707 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2708 /* or with X */
2709 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2710 /* put result into X */
2711 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2712
2713 /*
2714 * Allow management frames through, this also gives us those
2715 * management frames that we sent ourselves with status
2716 */
2717 /* load the lower byte of the IEEE 802.11 frame control field */
2718 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2719 /* mask off frame type and version */
2720 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2721 /* accept frame if it's both 0, fall through otherwise */
2722 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2723
2724 /*
2725 * TODO: add a bit to radiotap RX flags that indicates
2726 * that the sending station is not associated, then
2727 * add a filter here that filters on our DA and that flag
2728 * to allow us to deauth frames to that bad station.
2729 *
2730 * Not a regression -- we didn't do it before either.
2731 */
2732
2733 #if 0
2734 /*
2735 * drop non-data frames, WDS frames
2736 */
2737 /* load the lower byte of the frame control field */
2738 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2739 /* mask off QoS bit */
2740 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2741 /* drop non-data frames */
2742 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2743 /* load the upper byte of the frame control field */
2744 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2745 /* mask off toDS/fromDS */
2746 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2747 /* drop WDS frames */
2748 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2749 #endif
2750
2751 /*
2752 * add header length to index
2753 */
2754 /* load the lower byte of the frame control field */
2755 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2756 /* mask off QoS bit */
2757 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2758 /* right shift it by 6 to give 0 or 2 */
2759 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2760 /* add data frame header length */
2761 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2762 /* add index, was start of 802.11 header */
2763 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2764 /* move to index, now start of LL header */
2765 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2766
2767 /*
2768 * Accept empty data frames, we use those for
2769 * polling activity.
2770 */
2771 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2772 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2773
2774 /*
2775 * Accept EAPOL frames
2776 */
2777 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2778 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2779 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2780 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2781
2782 /* keep these last two statements or change the code below */
2783 /* return 0 == "DROP" */
2784 BPF_STMT(BPF_RET | BPF_K, 0),
2785 /* return ~0 == "keep all" */
2786 BPF_STMT(BPF_RET | BPF_K, ~0),
2787 };
2788
2789 static struct sock_fprog msock_filter = {
2790 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2791 .filter = msock_filter_insns,
2792 };
2793
2794
2795 static int add_monitor_filter(int s)
2796 {
2797 int idx;
2798
2799 /* rewrite all PASS/FAIL jump offsets */
2800 for (idx = 0; idx < msock_filter.len; idx++) {
2801 struct sock_filter *insn = &msock_filter_insns[idx];
2802
2803 if (BPF_CLASS(insn->code) == BPF_JMP) {
2804 if (insn->code == (BPF_JMP|BPF_JA)) {
2805 if (insn->k == PASS)
2806 insn->k = msock_filter.len - idx - 2;
2807 else if (insn->k == FAIL)
2808 insn->k = msock_filter.len - idx - 3;
2809 }
2810
2811 if (insn->jt == PASS)
2812 insn->jt = msock_filter.len - idx - 2;
2813 else if (insn->jt == FAIL)
2814 insn->jt = msock_filter.len - idx - 3;
2815
2816 if (insn->jf == PASS)
2817 insn->jf = msock_filter.len - idx - 2;
2818 else if (insn->jf == FAIL)
2819 insn->jf = msock_filter.len - idx - 3;
2820 }
2821 }
2822
2823 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2824 &msock_filter, sizeof(msock_filter))) {
2825 perror("SO_ATTACH_FILTER");
2826 return -1;
2827 }
2828
2829 return 0;
2830 }
2831
2832
2833 static int
2834 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2835 {
2836 char buf[IFNAMSIZ];
2837 struct sockaddr_ll ll;
2838 int optval;
2839 socklen_t optlen;
2840
2841 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2842 buf[IFNAMSIZ - 1] = '\0';
2843
2844 drv->monitor_ifidx =
2845 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2846
2847 if (drv->monitor_ifidx < 0)
2848 return -1;
2849
2850 if (hostapd_set_iface_flags(drv, buf, 1))
2851 goto error;
2852
2853 memset(&ll, 0, sizeof(ll));
2854 ll.sll_family = AF_PACKET;
2855 ll.sll_ifindex = drv->monitor_ifidx;
2856 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2857 if (drv->monitor_sock < 0) {
2858 perror("socket[PF_PACKET,SOCK_RAW]");
2859 goto error;
2860 }
2861
2862 if (add_monitor_filter(drv->monitor_sock)) {
2863 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2864 "interface; do filtering in user space");
2865 /* This works, but will cost in performance. */
2866 }
2867
2868 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2869 perror("monitor socket bind");
2870 goto error;
2871 }
2872
2873 optlen = sizeof(optval);
2874 optval = 20;
2875 if (setsockopt
2876 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2877 perror("Failed to set socket priority");
2878 goto error;
2879 }
2880
2881 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2882 drv, NULL)) {
2883 printf("Could not register monitor read socket\n");
2884 goto error;
2885 }
2886
2887 return 0;
2888 error:
2889 nl80211_remove_iface(drv, drv->monitor_ifidx);
2890 return -1;
2891 }
2892
2893 #endif /* CONFIG_AP || HOSTAPD */
2894
2895 #ifdef CONFIG_AP
2896
2897 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2898 struct wpa_driver_associate_params *params)
2899 {
2900 if (drv->monitor_ifidx < 0 &&
2901 nl80211_create_monitor_interface(drv))
2902 return -1;
2903
2904 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2905 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2906 nl80211_remove_iface(drv, drv->monitor_ifidx);
2907 drv->monitor_ifidx = -1;
2908 return -1;
2909 }
2910
2911 /* TODO: setup monitor interface (and add code somewhere to remove this
2912 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2913
2914 return 0;
2915 }
2916 #endif /* CONFIG_AP */
2917
2918
2919 static int wpa_driver_nl80211_associate(
2920 void *priv, struct wpa_driver_associate_params *params)
2921 {
2922 struct wpa_driver_nl80211_data *drv = priv;
2923 int ret = -1;
2924 struct nl_msg *msg;
2925
2926 #ifdef CONFIG_AP
2927 if (params->mode == 2)
2928 return wpa_driver_nl80211_ap(drv, params);
2929 #endif /* CONFIG_AP */
2930
2931 #ifndef NO_WEXT
2932 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2933 params->drop_unencrypted);
2934 #endif /* NO_WEXT */
2935
2936 drv->associated = 0;
2937
2938 msg = nlmsg_alloc();
2939 if (!msg)
2940 return -1;
2941
2942 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2943 drv->ifindex);
2944 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2945 NL80211_CMD_ASSOCIATE, 0);
2946
2947 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2948 if (params->bssid) {
2949 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2950 MAC2STR(params->bssid));
2951 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2952 }
2953 if (params->freq) {
2954 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2955 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2956 }
2957 if (params->ssid) {
2958 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2959 params->ssid, params->ssid_len);
2960 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2961 params->ssid);
2962 if (params->ssid_len > sizeof(drv->ssid))
2963 goto nla_put_failure;
2964 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2965 drv->ssid_len = params->ssid_len;
2966 }
2967 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2968 if (params->wpa_ie)
2969 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2970 params->wpa_ie);
2971
2972 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2973 msg = NULL;
2974 if (ret) {
2975 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2976 "(%s)", ret, strerror(-ret));
2977 goto nla_put_failure;
2978 }
2979 ret = 0;
2980 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2981 "successfully");
2982
2983 nla_put_failure:
2984 nlmsg_free(msg);
2985 return ret;
2986 }
2987
2988
2989 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2990 int ifindex, int mode)
2991 {
2992 struct nl_msg *msg;
2993 int ret = -ENOBUFS;
2994
2995 msg = nlmsg_alloc();
2996 if (!msg)
2997 return -ENOMEM;
2998
2999 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3000 0, NL80211_CMD_SET_INTERFACE, 0);
3001 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3002 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3003
3004 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3005 if (!ret)
3006 return 0;
3007 nla_put_failure:
3008 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3009 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3010 return ret;
3011 }
3012
3013
3014 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3015 {
3016 struct wpa_driver_nl80211_data *drv = priv;
3017 int ret = -1;
3018 int nlmode;
3019
3020 switch (mode) {
3021 case 0:
3022 nlmode = NL80211_IFTYPE_STATION;
3023 break;
3024 case 1:
3025 nlmode = NL80211_IFTYPE_ADHOC;
3026 break;
3027 case 2:
3028 nlmode = NL80211_IFTYPE_AP;
3029 break;
3030 default:
3031 return -1;
3032 }
3033
3034 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3035 drv->nlmode = nlmode;
3036 return 0;
3037 }
3038
3039 if (nlmode == drv->nlmode)
3040 return 0; /* Already in the requested mode */
3041
3042 /* mac80211 doesn't allow mode changes while the device is up, so
3043 * take the device down, try to set the mode again, and bring the
3044 * device back up.
3045 */
3046 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3047 /* Try to set the mode again while the interface is down */
3048 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3049 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3050 ret = -1;
3051 }
3052
3053 if (!ret)
3054 drv->nlmode = nlmode;
3055
3056 return ret;
3057 }
3058
3059
3060 static int wpa_driver_nl80211_get_capa(void *priv,
3061 struct wpa_driver_capa *capa)
3062 {
3063 struct wpa_driver_nl80211_data *drv = priv;
3064 if (!drv->has_capability)
3065 return -1;
3066 os_memcpy(capa, &drv->capa, sizeof(*capa));
3067 return 0;
3068 }
3069
3070
3071 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3072 {
3073 struct wpa_driver_nl80211_data *drv = priv;
3074
3075 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3076 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3077 drv->operstate = state;
3078 return wpa_driver_nl80211_send_oper_ifla(
3079 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3080 }
3081
3082
3083 #ifdef HOSTAPD
3084
3085 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3086
3087 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
3088 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
3089
3090
3091 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3092 int ifindex)
3093 {
3094 struct i802_bss *bss = &drv->bss;
3095 while (bss) {
3096 if (ifindex == bss->ifindex)
3097 return bss;
3098 bss = bss->next;
3099 }
3100 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3101 return NULL;
3102 }
3103
3104
3105 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3106 {
3107 int i;
3108 int *old;
3109
3110 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3111 ifidx);
3112 for (i = 0; i < drv->num_if_indices; i++) {
3113 if (drv->if_indices[i] == 0) {
3114 drv->if_indices[i] = ifidx;
3115 return;
3116 }
3117 }
3118
3119 if (drv->if_indices != drv->default_if_indices)
3120 old = drv->if_indices;
3121 else
3122 old = NULL;
3123
3124 drv->if_indices = realloc(old,
3125 sizeof(int) * (drv->num_if_indices + 1));
3126 if (!drv->if_indices) {
3127 if (!old)
3128 drv->if_indices = drv->default_if_indices;
3129 else
3130 drv->if_indices = old;
3131 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3132 "interfaces");
3133 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3134 return;
3135 }
3136 drv->if_indices[drv->num_if_indices] = ifidx;
3137 drv->num_if_indices++;
3138 }
3139
3140
3141 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3142 {
3143 int i;
3144
3145 for (i = 0; i < drv->num_if_indices; i++) {
3146 if (drv->if_indices[i] == ifidx) {
3147 drv->if_indices[i] = 0;
3148 break;
3149 }
3150 }
3151 }
3152
3153
3154 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3155 {
3156 int i;
3157
3158 for (i = 0; i < drv->num_if_indices; i++)
3159 if (drv->if_indices[i] == ifidx)
3160 return 1;
3161
3162 return 0;
3163 }
3164
3165
3166 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3167 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3168 size_t seq_len, const u8 *key, size_t key_len)
3169 {
3170 struct wpa_driver_nl80211_data *drv = priv;
3171 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3172 set_tx, seq, seq_len, key, key_len);
3173 }
3174
3175
3176 static inline int min_int(int a, int b)
3177 {
3178 if (a < b)
3179 return a;
3180 return b;
3181 }
3182
3183
3184 static int get_key_handler(struct nl_msg *msg, void *arg)
3185 {
3186 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3187 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3188
3189 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3190 genlmsg_attrlen(gnlh, 0), NULL);
3191
3192 /*
3193 * TODO: validate the key index and mac address!
3194 * Otherwise, there's a race condition as soon as
3195 * the kernel starts sending key notifications.
3196 */
3197
3198 if (tb[NL80211_ATTR_KEY_SEQ])
3199 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3200 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3201 return NL_SKIP;
3202 }
3203
3204
3205 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3206 int idx, u8 *seq)
3207 {
3208 struct wpa_driver_nl80211_data *drv = priv;
3209 struct nl_msg *msg;
3210
3211 msg = nlmsg_alloc();
3212 if (!msg)
3213 return -ENOMEM;
3214
3215 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3216 0, NL80211_CMD_GET_KEY, 0);
3217
3218 if (addr)
3219 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3220 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3221 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3222
3223 memset(seq, 0, 6);
3224
3225 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3226 nla_put_failure:
3227 return -ENOBUFS;
3228 }
3229
3230
3231 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3232 int mode)
3233 {
3234 struct wpa_driver_nl80211_data *drv = priv;
3235 struct nl_msg *msg;
3236 u8 rates[NL80211_MAX_SUPP_RATES];
3237 u8 rates_len = 0;
3238 int i;
3239
3240 msg = nlmsg_alloc();
3241 if (!msg)
3242 return -ENOMEM;
3243
3244 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3245 NL80211_CMD_SET_BSS, 0);
3246
3247 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3248 rates[rates_len++] = basic_rates[i] / 5;
3249
3250 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3251
3252 /* TODO: multi-BSS support */
3253 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3254
3255 return send_and_recv_msgs(drv, msg, NULL, NULL);
3256 nla_put_failure:
3257 return -ENOBUFS;
3258 }
3259
3260
3261 /* Set kernel driver on given frequency (MHz) */
3262 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3263 {
3264 struct wpa_driver_nl80211_data *drv = priv;
3265 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3266 freq->sec_channel_offset);
3267 }
3268
3269
3270 static int i802_set_rts(void *priv, int rts)
3271 {
3272 #ifdef NO_WEXT
3273 return -1;
3274 #else /* NO_WEXT */
3275 struct wpa_driver_nl80211_data *drv = priv;
3276 struct iwreq iwr;
3277
3278 memset(&iwr, 0, sizeof(iwr));
3279 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3280 iwr.u.rts.value = rts;
3281 iwr.u.rts.fixed = 1;
3282
3283 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3284 perror("ioctl[SIOCSIWRTS]");
3285 return -1;
3286 }
3287
3288 return 0;
3289 #endif /* NO_WEXT */
3290 }
3291
3292
3293 static int i802_set_frag(void *priv, int frag)
3294 {
3295 #ifdef NO_WEXT
3296 return -1;
3297 #else /* NO_WEXT */
3298 struct wpa_driver_nl80211_data *drv = priv;
3299 struct iwreq iwr;
3300
3301 memset(&iwr, 0, sizeof(iwr));
3302 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3303 iwr.u.frag.value = frag;
3304 iwr.u.frag.fixed = 1;
3305
3306 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3307 perror("ioctl[SIOCSIWFRAG]");
3308 return -1;
3309 }
3310
3311 return 0;
3312 #endif /* NO_WEXT */
3313 }
3314
3315
3316 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3317 {
3318 #ifdef NO_WEXT
3319 return -1;
3320 #else /* NO_WEXT */
3321 struct wpa_driver_nl80211_data *drv = priv;
3322 struct iwreq iwr;
3323
3324 memset(&iwr, 0, sizeof(iwr));
3325 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3326
3327 iwr.u.retry.value = short_retry;
3328 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3329 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3330 perror("ioctl[SIOCSIWRETRY(short)]");
3331 return -1;
3332 }
3333
3334 iwr.u.retry.value = long_retry;
3335 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3336 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3337 perror("ioctl[SIOCSIWRETRY(long)]");
3338 return -1;
3339 }
3340
3341 return 0;
3342 #endif /* NO_WEXT */
3343 }
3344
3345
3346 static int i802_flush(void *priv)
3347 {
3348 struct wpa_driver_nl80211_data *drv = priv;
3349 struct nl_msg *msg;
3350
3351 msg = nlmsg_alloc();
3352 if (!msg)
3353 return -1;
3354
3355 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3356 0, NL80211_CMD_DEL_STATION, 0);
3357
3358 /*
3359 * XXX: FIX! this needs to flush all VLANs too
3360 */
3361 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3362 if_nametoindex(drv->ifname));
3363
3364 return send_and_recv_msgs(drv, msg, NULL, NULL);
3365 nla_put_failure:
3366 return -ENOBUFS;
3367 }
3368
3369
3370 static int get_sta_handler(struct nl_msg *msg, void *arg)
3371 {
3372 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3373 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3374 struct hostap_sta_driver_data *data = arg;
3375 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3376 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3377 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3378 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3379 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3380 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3381 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3382 };
3383
3384 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3385 genlmsg_attrlen(gnlh, 0), NULL);
3386
3387 /*
3388 * TODO: validate the interface and mac address!
3389 * Otherwise, there's a race condition as soon as
3390 * the kernel starts sending station notifications.
3391 */
3392
3393 if (!tb[NL80211_ATTR_STA_INFO]) {
3394 wpa_printf(MSG_DEBUG, "sta stats missing!");
3395 return NL_SKIP;
3396 }
3397 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3398 tb[NL80211_ATTR_STA_INFO],
3399 stats_policy)) {
3400 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3401 return NL_SKIP;
3402 }
3403
3404 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3405 data->inactive_msec =
3406 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3407 if (stats[NL80211_STA_INFO_RX_BYTES])
3408 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3409 if (stats[NL80211_STA_INFO_TX_BYTES])
3410 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3411 if (stats[NL80211_STA_INFO_RX_PACKETS])
3412 data->rx_packets =
3413 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3414 if (stats[NL80211_STA_INFO_TX_PACKETS])
3415 data->tx_packets =
3416 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3417
3418 return NL_SKIP;
3419 }
3420
3421 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3422 const u8 *addr)
3423 {
3424 struct wpa_driver_nl80211_data *drv = priv;
3425 struct nl_msg *msg;
3426
3427 os_memset(data, 0, sizeof(*data));
3428 msg = nlmsg_alloc();
3429 if (!msg)
3430 return -ENOMEM;
3431
3432 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3433 0, NL80211_CMD_GET_STATION, 0);
3434
3435 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3436 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3437
3438 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3439 nla_put_failure:
3440 return -ENOBUFS;
3441 }
3442
3443
3444 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3445 size_t data_len, int encrypt, const u8 *own_addr)
3446 {
3447 struct wpa_driver_nl80211_data *drv = priv;
3448 struct ieee80211_hdr *hdr;
3449 size_t len;
3450 u8 *pos;
3451 int res;
3452 #if 0 /* FIX */
3453 int qos = sta->flags & WLAN_STA_WME;
3454 #else
3455 int qos = 0;
3456 #endif
3457
3458 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3459 data_len;
3460 hdr = os_zalloc(len);
3461 if (hdr == NULL) {
3462 printf("malloc() failed for i802_send_data(len=%lu)\n",
3463 (unsigned long) len);
3464 return -1;
3465 }
3466
3467 hdr->frame_control =
3468 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3469 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3470 if (encrypt)
3471 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3472 #if 0 /* To be enabled if qos determination is added above */
3473 if (qos) {
3474 hdr->frame_control |=
3475 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3476 }
3477 #endif
3478
3479 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3480 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3481 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3482 pos = (u8 *) (hdr + 1);
3483
3484 #if 0 /* To be enabled if qos determination is added above */
3485 if (qos) {
3486 /* add an empty QoS header if needed */
3487 pos[0] = 0;
3488 pos[1] = 0;
3489 pos += 2;
3490 }
3491 #endif
3492
3493 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3494 pos += sizeof(rfc1042_header);
3495 WPA_PUT_BE16(pos, ETH_P_PAE);
3496 pos += 2;
3497 memcpy(pos, data, data_len);
3498
3499 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3500 if (res < 0) {
3501 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3502 "failed: %d (%s)",
3503 (unsigned long) len, errno, strerror(errno));
3504 }
3505 free(hdr);
3506
3507 return res;
3508 }
3509
3510
3511 static int i802_sta_add(const char *ifname, void *priv,
3512 struct hostapd_sta_add_params *params)
3513 {
3514 struct wpa_driver_nl80211_data *drv = priv;
3515 struct nl_msg *msg;
3516 int ret = -ENOBUFS;
3517
3518 msg = nlmsg_alloc();
3519 if (!msg)
3520 return -ENOMEM;
3521
3522 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3523 0, NL80211_CMD_NEW_STATION, 0);
3524
3525 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3526 if_nametoindex(drv->ifname));
3527 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3528 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3529 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3530 params->supp_rates);
3531 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3532 params->listen_interval);
3533
3534 #ifdef CONFIG_IEEE80211N
3535 if (params->ht_capabilities) {
3536 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3537 params->ht_capabilities->length,
3538 &params->ht_capabilities->data);
3539 }
3540 #endif /* CONFIG_IEEE80211N */
3541
3542 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3543 if (ret)
3544 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3545 "result: %d (%s)", ret, strerror(-ret));
3546 if (ret == -EEXIST)
3547 ret = 0;
3548 nla_put_failure:
3549 return ret;
3550 }
3551
3552
3553 static int i802_sta_remove(void *priv, const u8 *addr)
3554 {
3555 struct wpa_driver_nl80211_data *drv = priv;
3556 struct nl_msg *msg;
3557 int ret;
3558
3559 msg = nlmsg_alloc();
3560 if (!msg)
3561 return -ENOMEM;
3562
3563 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3564 0, NL80211_CMD_DEL_STATION, 0);
3565
3566 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3567 if_nametoindex(drv->ifname));
3568 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3569
3570 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3571 if (ret == -ENOENT)
3572 return 0;
3573 return ret;
3574 nla_put_failure:
3575 return -ENOBUFS;
3576 }
3577
3578
3579 static int i802_sta_set_flags(void *priv, const u8 *addr,
3580 int total_flags, int flags_or, int flags_and)
3581 {
3582 struct wpa_driver_nl80211_data *drv = priv;
3583 struct nl_msg *msg, *flags = NULL;
3584
3585 msg = nlmsg_alloc();
3586 if (!msg)
3587 return -ENOMEM;
3588
3589 flags = nlmsg_alloc();
3590 if (!flags) {
3591 nlmsg_free(msg);
3592 return -ENOMEM;
3593 }
3594
3595 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3596 0, NL80211_CMD_SET_STATION, 0);
3597
3598 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3599 if_nametoindex(drv->ifname));
3600 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3601
3602 if (total_flags & WLAN_STA_AUTHORIZED)
3603 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3604
3605 if (total_flags & WLAN_STA_WMM)
3606 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3607
3608 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3609 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3610
3611 if (total_flags & WLAN_STA_MFP)
3612 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3613
3614 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3615 goto nla_put_failure;
3616
3617 nlmsg_free(flags);
3618
3619 return send_and_recv_msgs(drv, msg, NULL, NULL);
3620 nla_put_failure:
3621 nlmsg_free(flags);
3622 return -ENOBUFS;
3623 }
3624
3625
3626 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3627 int cw_min, int cw_max, int burst_time)
3628 {
3629 struct wpa_driver_nl80211_data *drv = priv;
3630 struct nl_msg *msg;
3631 struct nlattr *txq, *params;
3632
3633 msg = nlmsg_alloc();
3634 if (!msg)
3635 return -1;
3636
3637 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3638 0, NL80211_CMD_SET_WIPHY, 0);
3639
3640 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3641
3642 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3643 if (!txq)
3644 goto nla_put_failure;
3645
3646 /* We are only sending parameters for a single TXQ at a time */
3647 params = nla_nest_start(msg, 1);
3648 if (!params)
3649 goto nla_put_failure;
3650
3651 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3652 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3653 * 32 usec, so need to convert the value here. */
3654 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3655 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3656 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3657 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3658
3659 nla_nest_end(msg, params);
3660
3661 nla_nest_end(msg, txq);
3662
3663 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3664 return 0;
3665 nla_put_failure:
3666 return -1;
3667 }
3668
3669
3670 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3671 {
3672 struct wpa_driver_nl80211_data *drv = priv;
3673 int ifidx;
3674 struct i802_bss *bss;
3675
3676 bss = os_zalloc(sizeof(*bss));
3677 if (bss == NULL)
3678 return -1;
3679 bss->ifindex = if_nametoindex(ifname);
3680
3681 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3682 if (ifidx < 0) {
3683 os_free(bss);
3684 return -1;
3685 }
3686 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3687 nl80211_remove_iface(priv, ifidx);
3688 os_free(bss);
3689 return -1;
3690 }
3691 bss->next = drv->bss.next;
3692 drv->bss.next = bss;
3693 return 0;
3694 }
3695
3696
3697 static int i802_bss_remove(void *priv, const char *ifname)
3698 {
3699 struct wpa_driver_nl80211_data *drv = priv;
3700 struct i802_bss *bss, *prev;
3701 int ifindex = if_nametoindex(ifname);
3702 nl80211_remove_iface(priv, ifindex);
3703 prev = &drv->bss;
3704 bss = drv->bss.next;
3705 while (bss) {
3706 if (ifindex == bss->ifindex) {
3707 prev->next = bss->next;
3708 os_free(bss);
3709 break;
3710 }
3711 prev = bss;
3712 bss = bss->next;
3713 }
3714 return 0;
3715 }
3716
3717
3718 static int i802_set_beacon(const char *iface, void *priv,
3719 const u8 *head, size_t head_len,
3720 const u8 *tail, size_t tail_len, int dtim_period)
3721 {
3722 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3723 head, head_len,
3724 tail, tail_len,
3725 dtim_period);
3726 }
3727
3728
3729 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3730 {
3731 struct nl_msg *msg;
3732
3733 msg = nlmsg_alloc();
3734 if (!msg)
3735 return -ENOMEM;
3736
3737 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3738 0, NL80211_CMD_DEL_BEACON, 0);
3739 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3740
3741 return send_and_recv_msgs(drv, msg, NULL, NULL);
3742 nla_put_failure:
3743 return -ENOBUFS;
3744 }
3745
3746
3747 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3748 {
3749 struct wpa_driver_nl80211_data *drv = priv;
3750 struct nl_msg *msg;
3751
3752 msg = nlmsg_alloc();
3753 if (!msg)
3754 return -ENOMEM;
3755
3756 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3757 NL80211_CMD_SET_BSS, 0);
3758
3759 if (cts >= 0)
3760 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3761 if (preamble >= 0)
3762 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3763 if (slot >= 0)
3764 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3765
3766 /* TODO: multi-BSS support */
3767 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3768
3769 return send_and_recv_msgs(drv, msg, NULL, NULL);
3770 nla_put_failure:
3771 return -ENOBUFS;
3772 }
3773
3774
3775 static int i802_set_cts_protect(void *priv, int value)
3776 {
3777 return i802_set_bss(priv, value, -1, -1);
3778 }
3779
3780
3781 static int i802_set_preamble(void *priv, int value)
3782 {
3783 return i802_set_bss(priv, -1, value, -1);
3784 }
3785
3786
3787 static int i802_set_short_slot_time(void *priv, int value)
3788 {
3789 return i802_set_bss(priv, -1, -1, value);
3790 }
3791
3792
3793 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3794 {
3795 switch (type) {
3796 case HOSTAPD_IF_VLAN:
3797 return NL80211_IFTYPE_AP_VLAN;
3798 }
3799 return -1;
3800 }
3801
3802
3803 static int i802_if_add(const char *iface, void *priv,
3804 enum hostapd_driver_if_type type, char *ifname,
3805 const u8 *addr)
3806 {
3807 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3808 return -1;
3809 return 0;
3810 }
3811
3812
3813 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3814 char *ifname, const u8 *addr)
3815 {
3816 /* unused at the moment */
3817 return -1;
3818 }
3819
3820
3821 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3822 const char *ifname, const u8 *addr)
3823 {
3824 nl80211_remove_iface(priv, if_nametoindex(ifname));
3825 return 0;
3826 }
3827
3828
3829 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3830 const char *ifname, int vlan_id)
3831 {
3832 struct wpa_driver_nl80211_data *drv = priv;
3833 struct nl_msg *msg;
3834
3835 msg = nlmsg_alloc();
3836 if (!msg)
3837 return -ENOMEM;
3838
3839 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3840 0, NL80211_CMD_SET_STATION, 0);
3841
3842 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3843 if_nametoindex(drv->ifname));
3844 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3845 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3846 if_nametoindex(ifname));
3847
3848 return send_and_recv_msgs(drv, msg, NULL, NULL);
3849 nla_put_failure:
3850 return -ENOBUFS;
3851 }
3852
3853
3854 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3855 {
3856 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3857 struct sockaddr_ll lladdr;
3858 unsigned char buf[3000];
3859 int len;
3860 socklen_t fromlen = sizeof(lladdr);
3861
3862 len = recvfrom(sock, buf, sizeof(buf), 0,
3863 (struct sockaddr *)&lladdr, &fromlen);
3864 if (len < 0) {
3865 perror("recv");
3866 return;
3867 }
3868
3869 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3870 struct hostapd_data *hapd;
3871 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3872 if (!hapd)
3873 return;
3874 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3875 }
3876 }
3877
3878
3879 static int i802_get_inact_sec(void *priv, const u8 *addr)
3880 {
3881 struct hostap_sta_driver_data data;
3882 int ret;
3883
3884 data.inactive_msec = (unsigned long) -1;
3885 ret = i802_read_sta_data(priv, &data, addr);
3886 if (ret || data.inactive_msec == (unsigned long) -1)
3887 return -1;
3888 return data.inactive_msec / 1000;
3889 }
3890
3891
3892 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3893 {
3894 #if 0
3895 /* TODO */
3896 #endif
3897 return 0;
3898 }
3899
3900
3901 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
3902 {
3903 struct wpa_driver_nl80211_data *drv = priv;
3904 struct ieee80211_mgmt mgmt;
3905
3906 memset(&mgmt, 0, sizeof(mgmt));
3907 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3908 WLAN_FC_STYPE_DEAUTH);
3909 memcpy(mgmt.da, addr, ETH_ALEN);
3910 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3911 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3912 mgmt.u.deauth.reason_code = host_to_le16(reason);
3913 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3914 IEEE80211_HDRLEN +
3915 sizeof(mgmt.u.deauth));
3916 }
3917
3918
3919 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
3920 {
3921 struct wpa_driver_nl80211_data *drv = priv;
3922 struct ieee80211_mgmt mgmt;
3923
3924 memset(&mgmt, 0, sizeof(mgmt));
3925 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3926 WLAN_FC_STYPE_DISASSOC);
3927 memcpy(mgmt.da, addr, ETH_ALEN);
3928 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3929 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3930 mgmt.u.disassoc.reason_code = host_to_le16(reason);
3931 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3932 IEEE80211_HDRLEN +
3933 sizeof(mgmt.u.disassoc));
3934 }
3935
3936
3937 static void *i802_init(struct hostapd_data *hapd,
3938 struct wpa_init_params *params)
3939 {
3940 struct wpa_driver_nl80211_data *drv;
3941 size_t i;
3942
3943 drv = wpa_driver_nl80211_init(hapd, params->ifname);
3944 if (drv == NULL)
3945 return NULL;
3946
3947 drv->hapd = hapd;
3948 drv->bss.ifindex = drv->ifindex;
3949
3950 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3951 drv->if_indices = drv->default_if_indices;
3952 for (i = 0; i < params->num_bridge; i++) {
3953 if (params->bridge[i])
3954 add_ifidx(drv, if_nametoindex(params->bridge[i]));
3955 }
3956
3957 /* start listening for EAPOL on the default AP interface */
3958 add_ifidx(drv, drv->ifindex);
3959
3960 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3961 goto failed;
3962
3963 if (params->bssid && set_ifhwaddr(drv, drv->ifname, params->bssid))
3964 goto failed;
3965
3966 /* Initialise a monitor interface */
3967 if (nl80211_create_monitor_interface(drv))
3968 goto failed;
3969
3970 if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3971 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3972 "into AP mode", drv->ifname);
3973 goto failed;
3974 }
3975
3976 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3977 goto failed;
3978
3979 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3980 if (drv->eapol_sock < 0) {
3981 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3982 goto failed;
3983 }
3984
3985 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3986 {
3987 printf("Could not register read socket for eapol\n");
3988 goto failed;
3989 }
3990
3991 if (get_ifhwaddr(drv, drv->ifname, drv->hapd->own_addr))
3992 goto failed;
3993
3994 return drv;
3995
3996 failed:
3997 if (drv->monitor_ifidx >= 0)
3998 nl80211_remove_iface(drv, drv->monitor_ifidx);
3999 if (drv->ioctl_sock >= 0)
4000 close(drv->ioctl_sock);
4001
4002 genl_family_put(drv->nl80211);
4003 nl_cache_free(drv->nl_cache);
4004 nl_handle_destroy(drv->nl_handle);
4005 nl_cb_put(drv->nl_cb);
4006
4007 os_free(drv);
4008 return NULL;
4009 }
4010
4011
4012 static void i802_deinit(void *priv)
4013 {
4014 wpa_driver_nl80211_deinit(priv);
4015 }
4016
4017 #endif /* HOSTAPD */
4018
4019
4020 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4021 .name = "nl80211",
4022 .desc = "Linux nl80211/cfg80211",
4023 .get_bssid = wpa_driver_nl80211_get_bssid,
4024 .get_ssid = wpa_driver_nl80211_get_ssid,
4025 .set_key = wpa_driver_nl80211_set_key,
4026 .scan2 = wpa_driver_nl80211_scan,
4027 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4028 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4029 .disassociate = wpa_driver_nl80211_disassociate,
4030 .authenticate = wpa_driver_nl80211_authenticate,
4031 .associate = wpa_driver_nl80211_associate,
4032 .init = wpa_driver_nl80211_init,
4033 .deinit = wpa_driver_nl80211_deinit,
4034 .get_capa = wpa_driver_nl80211_get_capa,
4035 .set_operstate = wpa_driver_nl80211_set_operstate,
4036 .set_country = wpa_driver_nl80211_set_country,
4037 .set_mode = wpa_driver_nl80211_set_mode,
4038 #ifdef CONFIG_AP
4039 .set_beacon = wpa_driver_nl80211_set_beacon,
4040 #endif /* CONFIG_AP */
4041 #if defined(CONFIG_AP) || defined(HOSTAPD)
4042 .send_mlme = wpa_driver_nl80211_send_mlme,
4043 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4044 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4045 #endif /* CONFIG_AP || HOSTAPD */
4046 #ifdef HOSTAPD
4047 .hapd_init = i802_init,
4048 .hapd_deinit = i802_deinit,
4049 .hapd_set_key = i802_set_key,
4050 .get_seqnum = i802_get_seqnum,
4051 .flush = i802_flush,
4052 .read_sta_data = i802_read_sta_data,
4053 .hapd_send_eapol = i802_send_eapol,
4054 .sta_set_flags = i802_sta_set_flags,
4055 .sta_deauth = i802_sta_deauth,
4056 .sta_disassoc = i802_sta_disassoc,
4057 .sta_remove = i802_sta_remove,
4058 .sta_add = i802_sta_add,
4059 .get_inact_sec = i802_get_inact_sec,
4060 .sta_clear_stats = i802_sta_clear_stats,
4061 .set_freq = i802_set_freq,
4062 .set_rts = i802_set_rts,
4063 .set_frag = i802_set_frag,
4064 .set_retry = i802_set_retry,
4065 .set_rate_sets = i802_set_rate_sets,
4066 .hapd_set_beacon = i802_set_beacon,
4067 .set_cts_protect = i802_set_cts_protect,
4068 .set_preamble = i802_set_preamble,
4069 .set_short_slot_time = i802_set_short_slot_time,
4070 .set_tx_queue_params = i802_set_tx_queue_params,
4071 .bss_add = i802_bss_add,
4072 .bss_remove = i802_bss_remove,
4073 .if_add = i802_if_add,
4074 .if_update = i802_if_update,
4075 .if_remove = i802_if_remove,
4076 .set_sta_vlan = i802_set_sta_vlan,
4077 #endif /* HOSTAPD */
4078 };
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