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1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <net/if_arp.h>
22 #include <netlink/genl/genl.h>
23 #include <netlink/genl/family.h>
24 #include <netlink/genl/ctrl.h>
25 #include "nl80211_copy.h"
26 #include "wireless_copy.h"
27
28 #include "common.h"
29 #include "driver.h"
30 #include "eloop.h"
31 #include "ieee802_11_defs.h"
32
33 #if defined(CONFIG_AP) || defined(HOSTAPD)
34 #include <netpacket/packet.h>
35 #include <linux/filter.h>
36 #include "radiotap.h"
37 #include "radiotap_iter.h"
38 #endif /* CONFIG_AP || HOSTAPD */
39
40 #ifdef CONFIG_AP
41
42 #include "../hostapd/hostapd_defs.h"
43
44 #ifndef ETH_P_ALL
45 #define ETH_P_ALL 0x0003
46 #endif
47
48 #endif /* CONFIG_AP */
49
50 #ifdef HOSTAPD
51 #include <netlink/msg.h>
52 #include <netlink/attr.h>
53 #include <net/if.h>
54 #include <net/if_arp.h>
55
56 #include "../../hostapd/hostapd.h"
57 #include "../../hostapd/sta_flags.h"
58 #include "ieee802_11_common.h"
59
60 #ifdef CONFIG_LIBNL20
61 /* libnl 2.0 compatibility code */
62 #define nl_handle_alloc_cb nl_socket_alloc_cb
63 #define nl_handle_destroy nl_socket_free
64 #endif /* CONFIG_LIBNL20 */
65
66 #endif /* HOSTAPD */
67
68
69 #ifndef IFF_LOWER_UP
70 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
71 #endif
72 #ifndef IFF_DORMANT
73 #define IFF_DORMANT 0x20000 /* driver signals dormant */
74 #endif
75
76 #ifndef IF_OPER_DORMANT
77 #define IF_OPER_DORMANT 5
78 #endif
79 #ifndef IF_OPER_UP
80 #define IF_OPER_UP 6
81 #endif
82
83 enum ieee80211_msg_type {
84 ieee80211_msg_normal = 0,
85 ieee80211_msg_tx_callback_ack = 1,
86 ieee80211_msg_tx_callback_fail = 2,
87 };
88
89 struct i802_bss {
90 struct i802_bss *next;
91 int ifindex;
92 unsigned int beacon_set:1;
93 };
94
95 struct wpa_driver_nl80211_data {
96 void *ctx;
97 int link_event_sock;
98 int ioctl_sock; /* socket for ioctl() use */
99 char ifname[IFNAMSIZ + 1];
100 int ifindex;
101 int if_removed;
102 struct wpa_driver_capa capa;
103 int has_capability;
104
105 int operstate;
106
107 int scan_complete_events;
108
109 struct nl_handle *nl_handle;
110 struct nl_cache *nl_cache;
111 struct nl_cb *nl_cb;
112 struct genl_family *nl80211;
113
114 u8 bssid[ETH_ALEN];
115 int associated;
116 u8 ssid[32];
117 size_t ssid_len;
118
119 #ifdef CONFIG_AP
120 int beacon_int;
121 unsigned int beacon_set:1;
122 int monitor_sock;
123 int monitor_ifidx;
124 #endif /* CONFIG_AP */
125
126 #ifdef HOSTAPD
127 struct hostapd_data *hapd;
128
129 int eapol_sock; /* socket for EAPOL frames */
130 int monitor_sock; /* socket for monitor */
131 int monitor_ifidx;
132
133 int default_if_indices[16];
134 int *if_indices;
135 int num_if_indices;
136
137 int beacon_int;
138 struct i802_bss bss;
139 unsigned int ht_40mhz_scan:1;
140
141 int last_freq;
142 int last_freq_ht;
143 struct hostapd_neighbor_bss *neighbors;
144 size_t num_neighbors;
145 #endif /* HOSTAPD */
146 };
147
148
149 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
150 void *timeout_ctx);
151 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
152 int mode);
153 static int
154 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
155
156 #ifdef CONFIG_AP
157 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
158 int ifidx);
159 #endif /* CONFIG_AP */
160
161 #ifdef HOSTAPD
162 static void handle_frame(struct wpa_driver_nl80211_data *drv,
163 u8 *buf, size_t len,
164 struct hostapd_frame_info *hfi,
165 enum ieee80211_msg_type msg_type);
166 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
167 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
168 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
169 int ifindex);
170 #endif /* HOSTAPD */
171
172
173 /* nl80211 code */
174 static int ack_handler(struct nl_msg *msg, void *arg)
175 {
176 int *err = arg;
177 *err = 0;
178 return NL_STOP;
179 }
180
181 static int finish_handler(struct nl_msg *msg, void *arg)
182 {
183 int *ret = arg;
184 *ret = 0;
185 return NL_SKIP;
186 }
187
188 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
189 void *arg)
190 {
191 int *ret = arg;
192 *ret = err->error;
193 return NL_SKIP;
194 }
195
196
197 static int no_seq_check(struct nl_msg *msg, void *arg)
198 {
199 return NL_OK;
200 }
201
202
203 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
204 struct nl_msg *msg,
205 int (*valid_handler)(struct nl_msg *, void *),
206 void *valid_data)
207 {
208 struct nl_cb *cb;
209 int err = -ENOMEM;
210
211 cb = nl_cb_clone(drv->nl_cb);
212 if (!cb)
213 goto out;
214
215 err = nl_send_auto_complete(drv->nl_handle, msg);
216 if (err < 0)
217 goto out;
218
219 err = 1;
220
221 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
222 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
223 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
224
225 if (valid_handler)
226 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
227 valid_handler, valid_data);
228
229 while (err > 0)
230 nl_recvmsgs(drv->nl_handle, cb);
231 out:
232 nl_cb_put(cb);
233 nlmsg_free(msg);
234 return err;
235 }
236
237
238 struct family_data {
239 const char *group;
240 int id;
241 };
242
243
244 static int family_handler(struct nl_msg *msg, void *arg)
245 {
246 struct family_data *res = arg;
247 struct nlattr *tb[CTRL_ATTR_MAX + 1];
248 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
249 struct nlattr *mcgrp;
250 int i;
251
252 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
253 genlmsg_attrlen(gnlh, 0), NULL);
254 if (!tb[CTRL_ATTR_MCAST_GROUPS])
255 return NL_SKIP;
256
257 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
258 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
259 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
260 nla_len(mcgrp), NULL);
261 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
262 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
263 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
264 res->group,
265 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
266 continue;
267 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
268 break;
269 };
270
271 return NL_SKIP;
272 }
273
274
275 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
276 const char *family, const char *group)
277 {
278 struct nl_msg *msg;
279 int ret = -1;
280 struct family_data res = { group, -ENOENT };
281
282 msg = nlmsg_alloc();
283 if (!msg)
284 return -ENOMEM;
285 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
286 0, 0, CTRL_CMD_GETFAMILY, 0);
287 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
288
289 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
290 msg = NULL;
291 if (ret == 0)
292 ret = res.id;
293
294 nla_put_failure:
295 nlmsg_free(msg);
296 return ret;
297 }
298
299
300 static int wpa_driver_nl80211_send_oper_ifla(
301 struct wpa_driver_nl80211_data *drv,
302 int linkmode, int operstate)
303 {
304 struct {
305 struct nlmsghdr hdr;
306 struct ifinfomsg ifinfo;
307 char opts[16];
308 } req;
309 struct rtattr *rta;
310 static int nl_seq;
311 ssize_t ret;
312
313 os_memset(&req, 0, sizeof(req));
314
315 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
316 req.hdr.nlmsg_type = RTM_SETLINK;
317 req.hdr.nlmsg_flags = NLM_F_REQUEST;
318 req.hdr.nlmsg_seq = ++nl_seq;
319 req.hdr.nlmsg_pid = 0;
320
321 req.ifinfo.ifi_family = AF_UNSPEC;
322 req.ifinfo.ifi_type = 0;
323 req.ifinfo.ifi_index = drv->ifindex;
324 req.ifinfo.ifi_flags = 0;
325 req.ifinfo.ifi_change = 0;
326
327 if (linkmode != -1) {
328 rta = (struct rtattr *)
329 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
330 rta->rta_type = IFLA_LINKMODE;
331 rta->rta_len = RTA_LENGTH(sizeof(char));
332 *((char *) RTA_DATA(rta)) = linkmode;
333 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
334 RTA_LENGTH(sizeof(char));
335 }
336 if (operstate != -1) {
337 rta = (struct rtattr *)
338 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
339 rta->rta_type = IFLA_OPERSTATE;
340 rta->rta_len = RTA_LENGTH(sizeof(char));
341 *((char *) RTA_DATA(rta)) = operstate;
342 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
343 RTA_LENGTH(sizeof(char));
344 }
345
346 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
347 linkmode, operstate);
348
349 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
350 if (ret < 0) {
351 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
352 "%s (assume operstate is not supported)",
353 strerror(errno));
354 }
355
356 return ret < 0 ? -1 : 0;
357 }
358
359
360 static int wpa_driver_nl80211_set_auth_param(
361 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
362 {
363 struct iwreq iwr;
364 int ret = 0;
365
366 os_memset(&iwr, 0, sizeof(iwr));
367 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
368 iwr.u.param.flags = idx & IW_AUTH_INDEX;
369 iwr.u.param.value = value;
370
371 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
372 if (errno != EOPNOTSUPP) {
373 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
374 "value 0x%x) failed: %s)",
375 idx, value, strerror(errno));
376 }
377 ret = errno == EOPNOTSUPP ? -2 : -1;
378 }
379
380 return ret;
381 }
382
383
384 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
385 {
386 struct wpa_driver_nl80211_data *drv = priv;
387 if (!drv->associated)
388 return -1;
389 os_memcpy(bssid, drv->bssid, ETH_ALEN);
390 return 0;
391 }
392
393
394 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
395 {
396 struct wpa_driver_nl80211_data *drv = priv;
397 if (!drv->associated)
398 return -1;
399 os_memcpy(ssid, drv->ssid, drv->ssid_len);
400 return drv->ssid_len;
401 }
402
403
404 #ifndef HOSTAPD
405 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
406 void *ctx, char *buf, size_t len,
407 int del)
408 {
409 union wpa_event_data event;
410
411 os_memset(&event, 0, sizeof(event));
412 if (len > sizeof(event.interface_status.ifname))
413 len = sizeof(event.interface_status.ifname) - 1;
414 os_memcpy(event.interface_status.ifname, buf, len);
415 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
416 EVENT_INTERFACE_ADDED;
417
418 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
419 del ? "DEL" : "NEW",
420 event.interface_status.ifname,
421 del ? "removed" : "added");
422
423 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
424 if (del)
425 drv->if_removed = 1;
426 else
427 drv->if_removed = 0;
428 }
429
430 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
431 }
432
433
434 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
435 struct nlmsghdr *h)
436 {
437 struct ifinfomsg *ifi;
438 int attrlen, _nlmsg_len, rta_len;
439 struct rtattr *attr;
440
441 ifi = NLMSG_DATA(h);
442
443 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
444
445 attrlen = h->nlmsg_len - _nlmsg_len;
446 if (attrlen < 0)
447 return 0;
448
449 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
450
451 rta_len = RTA_ALIGN(sizeof(struct rtattr));
452 while (RTA_OK(attr, attrlen)) {
453 if (attr->rta_type == IFLA_IFNAME) {
454 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
455 == 0)
456 return 1;
457 else
458 break;
459 }
460 attr = RTA_NEXT(attr, attrlen);
461 }
462
463 return 0;
464 }
465
466
467 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
468 int ifindex, struct nlmsghdr *h)
469 {
470 if (drv->ifindex == ifindex)
471 return 1;
472
473 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
474 drv->ifindex = if_nametoindex(drv->ifname);
475 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
476 "interface");
477 wpa_driver_nl80211_finish_drv_init(drv);
478 return 1;
479 }
480
481 return 0;
482 }
483
484
485 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
486 void *ctx, struct nlmsghdr *h,
487 size_t len)
488 {
489 struct ifinfomsg *ifi;
490 int attrlen, _nlmsg_len, rta_len;
491 struct rtattr * attr;
492
493 if (len < sizeof(*ifi))
494 return;
495
496 ifi = NLMSG_DATA(h);
497
498 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
499 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
500 ifi->ifi_index);
501 return;
502 }
503
504 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
505 "(%s%s%s%s)",
506 drv->operstate, ifi->ifi_flags,
507 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
508 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
509 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
510 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
511 /*
512 * Some drivers send the association event before the operup event--in
513 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
514 * fails. This will hit us when wpa_supplicant does not need to do
515 * IEEE 802.1X authentication
516 */
517 if (drv->operstate == 1 &&
518 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
519 !(ifi->ifi_flags & IFF_RUNNING))
520 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
521
522 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
523
524 attrlen = h->nlmsg_len - _nlmsg_len;
525 if (attrlen < 0)
526 return;
527
528 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
529
530 rta_len = RTA_ALIGN(sizeof(struct rtattr));
531 while (RTA_OK(attr, attrlen)) {
532 if (attr->rta_type == IFLA_IFNAME) {
533 wpa_driver_nl80211_event_link(
534 drv, ctx,
535 ((char *) attr) + rta_len,
536 attr->rta_len - rta_len, 0);
537 }
538 attr = RTA_NEXT(attr, attrlen);
539 }
540 }
541
542
543 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
544 void *ctx, struct nlmsghdr *h,
545 size_t len)
546 {
547 struct ifinfomsg *ifi;
548 int attrlen, _nlmsg_len, rta_len;
549 struct rtattr * attr;
550
551 if (len < sizeof(*ifi))
552 return;
553
554 ifi = NLMSG_DATA(h);
555
556 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
557
558 attrlen = h->nlmsg_len - _nlmsg_len;
559 if (attrlen < 0)
560 return;
561
562 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
563
564 rta_len = RTA_ALIGN(sizeof(struct rtattr));
565 while (RTA_OK(attr, attrlen)) {
566 if (attr->rta_type == IFLA_IFNAME) {
567 wpa_driver_nl80211_event_link(
568 drv, ctx,
569 ((char *) attr) + rta_len,
570 attr->rta_len - rta_len, 1);
571 }
572 attr = RTA_NEXT(attr, attrlen);
573 }
574 }
575
576
577 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
578 void *sock_ctx)
579 {
580 char buf[8192];
581 int left;
582 struct sockaddr_nl from;
583 socklen_t fromlen;
584 struct nlmsghdr *h;
585 int max_events = 10;
586
587 try_again:
588 fromlen = sizeof(from);
589 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
590 (struct sockaddr *) &from, &fromlen);
591 if (left < 0) {
592 if (errno != EINTR && errno != EAGAIN)
593 perror("recvfrom(netlink)");
594 return;
595 }
596
597 h = (struct nlmsghdr *) buf;
598 while (left >= (int) sizeof(*h)) {
599 int len, plen;
600
601 len = h->nlmsg_len;
602 plen = len - sizeof(*h);
603 if (len > left || plen < 0) {
604 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
605 "len=%d left=%d plen=%d",
606 len, left, plen);
607 break;
608 }
609
610 switch (h->nlmsg_type) {
611 case RTM_NEWLINK:
612 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
613 h, plen);
614 break;
615 case RTM_DELLINK:
616 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
617 h, plen);
618 break;
619 }
620
621 len = NLMSG_ALIGN(len);
622 left -= len;
623 h = (struct nlmsghdr *) ((char *) h + len);
624 }
625
626 if (left > 0) {
627 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
628 "message", left);
629 }
630
631 if (--max_events > 0) {
632 /*
633 * Try to receive all events in one eloop call in order to
634 * limit race condition on cases where AssocInfo event, Assoc
635 * event, and EAPOL frames are received more or less at the
636 * same time. We want to process the event messages first
637 * before starting EAPOL processing.
638 */
639 goto try_again;
640 }
641 }
642
643
644 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
645 const u8 *frame, size_t len)
646 {
647 const struct ieee80211_mgmt *mgmt;
648 union wpa_event_data event;
649
650 mgmt = (const struct ieee80211_mgmt *) frame;
651 if (len < 24 + sizeof(mgmt->u.auth)) {
652 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
653 "frame");
654 return;
655 }
656
657 os_memset(&event, 0, sizeof(event));
658 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
659 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
660 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
661 if (len > 24 + sizeof(mgmt->u.auth)) {
662 event.auth.ies = mgmt->u.auth.variable;
663 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
664 }
665
666 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
667 }
668
669
670 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
671 const u8 *frame, size_t len)
672 {
673 const struct ieee80211_mgmt *mgmt;
674 union wpa_event_data event;
675 u16 status;
676
677 mgmt = (const struct ieee80211_mgmt *) frame;
678 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
679 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
680 "frame");
681 return;
682 }
683
684 status = le_to_host16(mgmt->u.assoc_resp.status_code);
685 if (status != WLAN_STATUS_SUCCESS) {
686 os_memset(&event, 0, sizeof(event));
687 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
688 event.assoc_reject.resp_ies =
689 (u8 *) mgmt->u.assoc_resp.variable;
690 event.assoc_reject.resp_ies_len =
691 len - 24 - sizeof(mgmt->u.assoc_resp);
692 }
693 event.assoc_reject.status_code = status;
694
695 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
696 return;
697 }
698
699 drv->associated = 1;
700 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
701
702 os_memset(&event, 0, sizeof(event));
703 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
704 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
705 event.assoc_info.resp_ies_len =
706 len - 24 - sizeof(mgmt->u.assoc_resp);
707 }
708
709 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
710 }
711
712
713 static void mlme_event(struct wpa_driver_nl80211_data *drv,
714 enum nl80211_commands cmd, struct nlattr *frame)
715 {
716 if (frame == NULL) {
717 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
718 "data", cmd);
719 return;
720 }
721
722 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
723 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
724 nla_data(frame), nla_len(frame));
725
726 switch (cmd) {
727 case NL80211_CMD_AUTHENTICATE:
728 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
729 break;
730 case NL80211_CMD_ASSOCIATE:
731 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
732 break;
733 case NL80211_CMD_DEAUTHENTICATE:
734 drv->associated = 0;
735 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
736 break;
737 case NL80211_CMD_DISASSOCIATE:
738 drv->associated = 0;
739 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
740 break;
741 default:
742 break;
743 }
744 }
745
746 #endif /* HOSTAPD */
747
748
749 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
750 struct nlattr *tb[])
751 {
752 #ifdef HOSTAPD
753 if (tb[NL80211_ATTR_MAC])
754 hostapd_michael_mic_failure(drv->hapd,
755 nla_data(tb[NL80211_ATTR_MAC]));
756 #else /* HOSTAPD */
757 union wpa_event_data data;
758
759 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
760 os_memset(&data, 0, sizeof(data));
761 if (tb[NL80211_ATTR_MAC]) {
762 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
763 nla_data(tb[NL80211_ATTR_MAC]),
764 nla_len(tb[NL80211_ATTR_MAC]));
765 }
766 if (tb[NL80211_ATTR_KEY_SEQ]) {
767 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
768 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
769 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
770 }
771 if (tb[NL80211_ATTR_KEY_TYPE]) {
772 enum nl80211_key_type key_type =
773 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
774 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
775 if (key_type == NL80211_KEYTYPE_PAIRWISE)
776 data.michael_mic_failure.unicast = 1;
777 } else
778 data.michael_mic_failure.unicast = 1;
779
780 if (tb[NL80211_ATTR_KEY_IDX]) {
781 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
782 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
783 }
784
785 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
786 #endif /* HOSTAPD */
787 }
788
789
790 static int process_event(struct nl_msg *msg, void *arg)
791 {
792 struct wpa_driver_nl80211_data *drv = arg;
793 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
794 struct nlattr *tb[NL80211_ATTR_MAX + 1];
795
796 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
797 genlmsg_attrlen(gnlh, 0), NULL);
798
799 if (tb[NL80211_ATTR_IFINDEX]) {
800 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
801 if (ifindex != drv->ifindex) {
802 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
803 " for foreign interface (ifindex %d)",
804 gnlh->cmd, ifindex);
805 return NL_SKIP;
806 }
807 }
808
809 switch (gnlh->cmd) {
810 #ifndef HOSTAPD
811 case NL80211_CMD_NEW_SCAN_RESULTS:
812 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
813 drv->scan_complete_events = 1;
814 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
815 drv->ctx);
816 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
817 break;
818 case NL80211_CMD_SCAN_ABORTED:
819 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
820 /*
821 * Need to indicate that scan results are available in order
822 * not to make wpa_supplicant stop its scanning.
823 */
824 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
825 drv->ctx);
826 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
827 break;
828 case NL80211_CMD_AUTHENTICATE:
829 case NL80211_CMD_ASSOCIATE:
830 case NL80211_CMD_DEAUTHENTICATE:
831 case NL80211_CMD_DISASSOCIATE:
832 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
833 break;
834 #endif /* HOSTAPD */
835 case NL80211_CMD_MICHAEL_MIC_FAILURE:
836 mlme_event_michael_mic_failure(drv, tb);
837 break;
838 default:
839 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
840 "(cmd=%d)", gnlh->cmd);
841 break;
842 }
843
844 return NL_SKIP;
845 }
846
847
848 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
849 void *sock_ctx)
850 {
851 struct nl_cb *cb;
852 struct wpa_driver_nl80211_data *drv = eloop_ctx;
853
854 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
855
856 cb = nl_cb_clone(drv->nl_cb);
857 if (!cb)
858 return;
859 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
860 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
861 nl_recvmsgs(drv->nl_handle, cb);
862 nl_cb_put(cb);
863 }
864
865
866 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
867 const char *ifname, int dev_up)
868 {
869 struct ifreq ifr;
870
871 if (drv->ioctl_sock < 0)
872 return -1;
873
874 os_memset(&ifr, 0, sizeof(ifr));
875 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
876
877 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
878 perror("ioctl[SIOCGIFFLAGS]");
879 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
880 ifname);
881 return -1;
882 }
883
884 if (dev_up) {
885 if (ifr.ifr_flags & IFF_UP)
886 return 0;
887 ifr.ifr_flags |= IFF_UP;
888 } else {
889 if (!(ifr.ifr_flags & IFF_UP))
890 return 0;
891 ifr.ifr_flags &= ~IFF_UP;
892 }
893
894 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
895 perror("ioctl[SIOCSIFFLAGS]");
896 return -1;
897 }
898
899 return 0;
900 }
901
902
903 /**
904 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
905 * @priv: driver_nl80211 private data
906 * @alpha2_arg: country to which to switch to
907 * Returns: 0 on success, -1 on failure
908 *
909 * This asks nl80211 to set the regulatory domain for given
910 * country ISO / IEC alpha2.
911 */
912 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
913 {
914 struct wpa_driver_nl80211_data *drv = priv;
915 char alpha2[3];
916 struct nl_msg *msg;
917
918 msg = nlmsg_alloc();
919 if (!msg)
920 return -ENOMEM;
921
922 alpha2[0] = alpha2_arg[0];
923 alpha2[1] = alpha2_arg[1];
924 alpha2[2] = '\0';
925
926 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
927 0, NL80211_CMD_REQ_SET_REG, 0);
928
929 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
930 if (send_and_recv_msgs(drv, msg, NULL, NULL))
931 return -EINVAL;
932 return 0;
933 nla_put_failure:
934 return -EINVAL;
935 }
936
937
938 struct wiphy_info_data {
939 int max_scan_ssids;
940 int ap_supported;
941 };
942
943
944 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
945 {
946 struct nlattr *tb[NL80211_ATTR_MAX + 1];
947 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
948 struct wiphy_info_data *info = arg;
949
950 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
951 genlmsg_attrlen(gnlh, 0), NULL);
952
953 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
954 info->max_scan_ssids =
955 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
956
957 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
958 struct nlattr *nl_mode;
959 int i;
960 nla_for_each_nested(nl_mode,
961 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
962 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
963 info->ap_supported = 1;
964 break;
965 }
966 }
967 }
968
969 return NL_SKIP;
970 }
971
972
973 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
974 struct wiphy_info_data *info)
975 {
976 struct nl_msg *msg;
977
978 os_memset(info, 0, sizeof(*info));
979 msg = nlmsg_alloc();
980 if (!msg)
981 return -1;
982
983 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
984 0, NL80211_CMD_GET_WIPHY, 0);
985
986 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
987
988 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
989 return 0;
990 msg = NULL;
991 nla_put_failure:
992 nlmsg_free(msg);
993 return -1;
994 }
995
996
997 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
998 {
999 struct wiphy_info_data info;
1000 if (wpa_driver_nl80211_get_info(drv, &info))
1001 return;
1002 drv->has_capability = 1;
1003 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1004 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1005 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1006 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1007 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1008 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1009 WPA_DRIVER_CAPA_ENC_WEP104 |
1010 WPA_DRIVER_CAPA_ENC_TKIP |
1011 WPA_DRIVER_CAPA_ENC_CCMP;
1012
1013 drv->capa.max_scan_ssids = info.max_scan_ssids;
1014 if (info.ap_supported)
1015 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1016 }
1017
1018
1019 /**
1020 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1021 * @ctx: context to be used when calling wpa_supplicant functions,
1022 * e.g., wpa_supplicant_event()
1023 * @ifname: interface name, e.g., wlan0
1024 * Returns: Pointer to private data, %NULL on failure
1025 */
1026 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1027 {
1028 int s, ret;
1029 struct sockaddr_nl local;
1030 struct wpa_driver_nl80211_data *drv;
1031
1032 drv = os_zalloc(sizeof(*drv));
1033 if (drv == NULL)
1034 return NULL;
1035 drv->ctx = ctx;
1036 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1037 #ifdef CONFIG_AP
1038 drv->monitor_ifidx = -1;
1039 drv->monitor_sock = -1;
1040 #endif /* CONFIG_AP */
1041
1042 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1043 if (drv->nl_cb == NULL) {
1044 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1045 "callbacks");
1046 goto err1;
1047 }
1048
1049 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1050 if (drv->nl_handle == NULL) {
1051 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1052 "callbacks");
1053 goto err2;
1054 }
1055
1056 if (genl_connect(drv->nl_handle)) {
1057 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1058 "netlink");
1059 goto err3;
1060 }
1061
1062 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1063 if (drv->nl_cache == NULL) {
1064 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1065 "netlink cache");
1066 goto err3;
1067 }
1068
1069 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1070 if (drv->nl80211 == NULL) {
1071 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1072 "found");
1073 goto err4;
1074 }
1075
1076 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1077 if (ret >= 0)
1078 ret = nl_socket_add_membership(drv->nl_handle, ret);
1079 if (ret < 0) {
1080 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1081 "membership for scan events: %d (%s)",
1082 ret, strerror(-ret));
1083 goto err4;
1084 }
1085
1086 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1087 if (ret >= 0)
1088 ret = nl_socket_add_membership(drv->nl_handle, ret);
1089 if (ret < 0) {
1090 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1091 "membership for mlme events: %d (%s)",
1092 ret, strerror(-ret));
1093 goto err4;
1094 }
1095 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1096
1097 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1098 wpa_driver_nl80211_event_receive, drv, ctx);
1099
1100 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1101 if (drv->ioctl_sock < 0) {
1102 perror("socket(PF_INET,SOCK_DGRAM)");
1103 goto err5;
1104 }
1105
1106 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1107 if (s < 0) {
1108 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1109 goto err6;
1110 }
1111
1112 os_memset(&local, 0, sizeof(local));
1113 local.nl_family = AF_NETLINK;
1114 local.nl_groups = RTMGRP_LINK;
1115 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1116 perror("bind(netlink)");
1117 close(s);
1118 goto err6;
1119 }
1120
1121 #ifndef HOSTAPD
1122 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1123 ctx);
1124 #endif /* HOSTAPD */
1125 drv->link_event_sock = s;
1126
1127 if (wpa_driver_nl80211_finish_drv_init(drv))
1128 goto err7;
1129
1130 return drv;
1131
1132 err7:
1133 eloop_unregister_read_sock(drv->link_event_sock);
1134 close(drv->link_event_sock);
1135 err6:
1136 close(drv->ioctl_sock);
1137 err5:
1138 genl_family_put(drv->nl80211);
1139 err4:
1140 nl_cache_free(drv->nl_cache);
1141 err3:
1142 nl_handle_destroy(drv->nl_handle);
1143 err2:
1144 nl_cb_put(drv->nl_cb);
1145 err1:
1146 os_free(drv);
1147 return NULL;
1148 }
1149
1150
1151 static int
1152 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1153 {
1154 drv->ifindex = if_nametoindex(drv->ifname);
1155
1156 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1157 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1158 "use managed mode");
1159 }
1160
1161 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1162 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1163 "UP", drv->ifname);
1164 return -1;
1165 }
1166
1167 wpa_driver_nl80211_capa(drv);
1168
1169 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1170
1171 return 0;
1172 }
1173
1174
1175 /**
1176 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1177 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1178 *
1179 * Shut down driver interface and processing of driver events. Free
1180 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1181 */
1182 static void wpa_driver_nl80211_deinit(void *priv)
1183 {
1184 struct wpa_driver_nl80211_data *drv = priv;
1185
1186 #ifdef CONFIG_AP
1187 if (drv->monitor_ifidx >= 0)
1188 nl80211_remove_iface(drv, drv->monitor_ifidx);
1189 if (drv->monitor_sock >= 0) {
1190 eloop_unregister_read_sock(drv->monitor_sock);
1191 close(drv->monitor_sock);
1192 }
1193 #endif /* CONFIG_AP */
1194
1195 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1196
1197 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1198
1199 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1200
1201 eloop_unregister_read_sock(drv->link_event_sock);
1202
1203 hostapd_set_iface_flags(drv, drv->ifname, 0);
1204 wpa_driver_nl80211_set_mode(drv, 0);
1205
1206 close(drv->link_event_sock);
1207 close(drv->ioctl_sock);
1208
1209 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1210 genl_family_put(drv->nl80211);
1211 nl_cache_free(drv->nl_cache);
1212 nl_handle_destroy(drv->nl_handle);
1213 nl_cb_put(drv->nl_cb);
1214
1215 os_free(drv);
1216 }
1217
1218
1219 /**
1220 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1221 * @eloop_ctx: Unused
1222 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1223 *
1224 * This function can be used as registered timeout when starting a scan to
1225 * generate a scan completed event if the driver does not report this.
1226 */
1227 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1228 {
1229 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1230 #ifndef HOSTAPD
1231 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1232 #endif /* HOSTAPD */
1233 }
1234
1235
1236 /**
1237 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1238 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1239 * @params: Scan parameters
1240 * Returns: 0 on success, -1 on failure
1241 */
1242 static int wpa_driver_nl80211_scan(void *priv,
1243 struct wpa_driver_scan_params *params)
1244 {
1245 struct wpa_driver_nl80211_data *drv = priv;
1246 int ret = 0, timeout;
1247 struct nl_msg *msg, *ssids, *freqs;
1248 size_t i;
1249
1250 msg = nlmsg_alloc();
1251 ssids = nlmsg_alloc();
1252 freqs = nlmsg_alloc();
1253 if (!msg || !ssids || !freqs) {
1254 nlmsg_free(msg);
1255 nlmsg_free(ssids);
1256 nlmsg_free(freqs);
1257 return -1;
1258 }
1259
1260 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1261 NL80211_CMD_TRIGGER_SCAN, 0);
1262
1263 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1264
1265 for (i = 0; i < params->num_ssids; i++) {
1266 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1267 params->ssids[i].ssid);
1268 }
1269 if (params->num_ssids)
1270 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1271
1272 if (params->extra_ies) {
1273 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1274 params->extra_ies);
1275 }
1276
1277 if (params->freqs) {
1278 for (i = 0; params->freqs[i]; i++)
1279 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1280 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1281 }
1282
1283 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1284 msg = NULL;
1285 if (ret) {
1286 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1287 "(%s)", ret, strerror(-ret));
1288 goto nla_put_failure;
1289 }
1290
1291 /* Not all drivers generate "scan completed" wireless event, so try to
1292 * read results after a timeout. */
1293 timeout = 10;
1294 if (drv->scan_complete_events) {
1295 /*
1296 * The driver seems to deliver events to notify when scan is
1297 * complete, so use longer timeout to avoid race conditions
1298 * with scanning and following association request.
1299 */
1300 timeout = 30;
1301 }
1302 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1303 "seconds", ret, timeout);
1304 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1305 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1306 drv, drv->ctx);
1307
1308 nla_put_failure:
1309 nlmsg_free(ssids);
1310 nlmsg_free(msg);
1311 nlmsg_free(freqs);
1312 return ret;
1313 }
1314
1315
1316 static int bss_info_handler(struct nl_msg *msg, void *arg)
1317 {
1318 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1319 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1320 struct nlattr *bss[NL80211_BSS_MAX + 1];
1321 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1322 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1323 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1324 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1325 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1326 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1327 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1328 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1329 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1330 };
1331 struct wpa_scan_results *res = arg;
1332 struct wpa_scan_res **tmp;
1333 struct wpa_scan_res *r;
1334 const u8 *ie;
1335 size_t ie_len;
1336
1337 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1338 genlmsg_attrlen(gnlh, 0), NULL);
1339 if (!tb[NL80211_ATTR_BSS])
1340 return NL_SKIP;
1341 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1342 bss_policy))
1343 return NL_SKIP;
1344 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1345 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1346 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1347 } else {
1348 ie = NULL;
1349 ie_len = 0;
1350 }
1351
1352 r = os_zalloc(sizeof(*r) + ie_len);
1353 if (r == NULL)
1354 return NL_SKIP;
1355 if (bss[NL80211_BSS_BSSID])
1356 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1357 ETH_ALEN);
1358 if (bss[NL80211_BSS_FREQUENCY])
1359 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1360 if (bss[NL80211_BSS_BEACON_INTERVAL])
1361 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1362 if (bss[NL80211_BSS_CAPABILITY])
1363 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1364 r->flags |= WPA_SCAN_NOISE_INVALID;
1365 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1366 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1367 r->level /= 100; /* mBm to dBm */
1368 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1369 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1370 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1371 r->flags |= WPA_SCAN_LEVEL_INVALID;
1372 } else
1373 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1374 if (bss[NL80211_BSS_TSF])
1375 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1376 r->ie_len = ie_len;
1377 if (ie)
1378 os_memcpy(r + 1, ie, ie_len);
1379
1380 tmp = os_realloc(res->res,
1381 (res->num + 1) * sizeof(struct wpa_scan_res *));
1382 if (tmp == NULL) {
1383 os_free(r);
1384 return NL_SKIP;
1385 }
1386 tmp[res->num++] = r;
1387 res->res = tmp;
1388
1389 return NL_SKIP;
1390 }
1391
1392
1393 /**
1394 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1395 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1396 * Returns: Scan results on success, -1 on failure
1397 */
1398 static struct wpa_scan_results *
1399 wpa_driver_nl80211_get_scan_results(void *priv)
1400 {
1401 struct wpa_driver_nl80211_data *drv = priv;
1402 struct nl_msg *msg;
1403 struct wpa_scan_results *res;
1404 int ret;
1405
1406 res = os_zalloc(sizeof(*res));
1407 if (res == NULL)
1408 return 0;
1409 msg = nlmsg_alloc();
1410 if (!msg)
1411 goto nla_put_failure;
1412
1413 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1414 NL80211_CMD_GET_SCAN, 0);
1415 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1416
1417 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1418 msg = NULL;
1419 if (ret == 0) {
1420 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1421 (unsigned long) res->num);
1422 return res;
1423 }
1424 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1425 "(%s)", ret, strerror(-ret));
1426 nla_put_failure:
1427 nlmsg_free(msg);
1428 wpa_scan_results_free(res);
1429 return NULL;
1430 }
1431
1432
1433 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1434 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1435 const u8 *seq, size_t seq_len,
1436 const u8 *key, size_t key_len)
1437 {
1438 struct nl_msg *msg;
1439 int ret;
1440
1441 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1442 "set_tx=%d seq_len=%lu key_len=%lu",
1443 __func__, ifindex, alg, addr, key_idx, set_tx,
1444 (unsigned long) seq_len, (unsigned long) key_len);
1445
1446 msg = nlmsg_alloc();
1447 if (!msg)
1448 return -ENOMEM;
1449
1450 if (alg == WPA_ALG_NONE) {
1451 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1452 0, NL80211_CMD_DEL_KEY, 0);
1453 } else {
1454 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1455 0, NL80211_CMD_NEW_KEY, 0);
1456 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1457 switch (alg) {
1458 case WPA_ALG_WEP:
1459 if (key_len == 5)
1460 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1461 0x000FAC01);
1462 else
1463 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1464 0x000FAC05);
1465 break;
1466 case WPA_ALG_TKIP:
1467 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1468 break;
1469 case WPA_ALG_CCMP:
1470 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1471 break;
1472 case WPA_ALG_IGTK:
1473 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1474 break;
1475 default:
1476 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1477 "algorithm %d", __func__, alg);
1478 nlmsg_free(msg);
1479 return -1;
1480 }
1481 }
1482
1483 if (seq)
1484 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1485
1486 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1487 {
1488 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1489 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1490 }
1491 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1492 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1493
1494 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1495 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1496 ret = 0;
1497 if (ret)
1498 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1499 ret, strerror(-ret));
1500
1501 /*
1502 * If we failed or don't need to set the default TX key (below),
1503 * we're done here.
1504 */
1505 if (ret || !set_tx || alg == WPA_ALG_NONE)
1506 return ret;
1507 #ifdef HOSTAPD /* FIX: is this needed? */
1508 if (addr)
1509 return ret;
1510 #endif /* HOSTAPD */
1511
1512 msg = nlmsg_alloc();
1513 if (!msg)
1514 return -ENOMEM;
1515
1516 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1517 0, NL80211_CMD_SET_KEY, 0);
1518 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1519 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1520 if (alg == WPA_ALG_IGTK)
1521 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1522 else
1523 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1524
1525 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1526 if (ret == -ENOENT)
1527 ret = 0;
1528 if (ret)
1529 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1530 "err=%d %s)", ret, strerror(-ret));
1531 return ret;
1532
1533 nla_put_failure:
1534 return -ENOBUFS;
1535 }
1536
1537
1538 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1539 const u8 *addr, int key_idx,
1540 int set_tx, const u8 *seq,
1541 size_t seq_len,
1542 const u8 *key, size_t key_len)
1543 {
1544 struct wpa_driver_nl80211_data *drv = priv;
1545 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1546 seq_len, key, key_len);
1547 }
1548
1549
1550 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1551 const u8 *addr, int cmd, u16 reason_code)
1552 {
1553 int ret = -1;
1554 struct nl_msg *msg;
1555
1556 msg = nlmsg_alloc();
1557 if (!msg)
1558 return -1;
1559
1560 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1561
1562 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1563 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1564 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1565
1566 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1567 msg = NULL;
1568 if (ret) {
1569 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1570 "(%s)", ret, strerror(-ret));
1571 goto nla_put_failure;
1572 }
1573 ret = 0;
1574
1575 nla_put_failure:
1576 nlmsg_free(msg);
1577 return ret;
1578 }
1579
1580
1581 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1582 int reason_code)
1583 {
1584 struct wpa_driver_nl80211_data *drv = priv;
1585 wpa_printf(MSG_DEBUG, "%s", __func__);
1586 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1587 reason_code);
1588 }
1589
1590
1591 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1592 int reason_code)
1593 {
1594 struct wpa_driver_nl80211_data *drv = priv;
1595 wpa_printf(MSG_DEBUG, "%s", __func__);
1596 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1597 reason_code);
1598 }
1599
1600
1601 static int wpa_driver_nl80211_authenticate(
1602 void *priv, struct wpa_driver_auth_params *params)
1603 {
1604 struct wpa_driver_nl80211_data *drv = priv;
1605 int ret = -1, i;
1606 struct nl_msg *msg;
1607 enum nl80211_auth_type type;
1608
1609 drv->associated = 0;
1610
1611 msg = nlmsg_alloc();
1612 if (!msg)
1613 return -1;
1614
1615 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1616 drv->ifindex);
1617
1618 for (i = 0; i < 4; i++) {
1619 if (!params->wep_key[i])
1620 continue;
1621 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1622 i == params->wep_tx_keyidx, NULL, 0,
1623 params->wep_key[i],
1624 params->wep_key_len[i]);
1625 }
1626
1627 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1628 NL80211_CMD_AUTHENTICATE, 0);
1629
1630 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1631 if (params->bssid) {
1632 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1633 MAC2STR(params->bssid));
1634 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1635 }
1636 if (params->freq) {
1637 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1638 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1639 }
1640 if (params->ssid) {
1641 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1642 params->ssid, params->ssid_len);
1643 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1644 params->ssid);
1645 }
1646 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1647 if (params->ie)
1648 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1649 /*
1650 * TODO: if multiple auth_alg options enabled, try them one by one if
1651 * the AP rejects authentication due to unknown auth alg
1652 */
1653 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1654 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1655 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1656 type = NL80211_AUTHTYPE_SHARED_KEY;
1657 else if (params->auth_alg & AUTH_ALG_LEAP)
1658 type = NL80211_AUTHTYPE_NETWORK_EAP;
1659 else if (params->auth_alg & AUTH_ALG_FT)
1660 type = NL80211_AUTHTYPE_FT;
1661 else
1662 goto nla_put_failure;
1663 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1664 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1665
1666 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1667 msg = NULL;
1668 if (ret) {
1669 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1670 "(%s)", ret, strerror(-ret));
1671 goto nla_put_failure;
1672 }
1673 ret = 0;
1674 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1675 "successfully");
1676
1677 nla_put_failure:
1678 nlmsg_free(msg);
1679 return ret;
1680 }
1681
1682
1683 #if defined(CONFIG_AP) || defined(HOSTAPD)
1684
1685 struct phy_info_arg {
1686 u16 *num_modes;
1687 struct hostapd_hw_modes *modes;
1688 };
1689
1690 static int phy_info_handler(struct nl_msg *msg, void *arg)
1691 {
1692 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1693 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1694 struct phy_info_arg *phy_info = arg;
1695
1696 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1697
1698 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1699 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1700 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1701 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1702 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1703 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1704 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1705 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1706 };
1707
1708 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1709 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1710 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1711 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1712 };
1713
1714 struct nlattr *nl_band;
1715 struct nlattr *nl_freq;
1716 struct nlattr *nl_rate;
1717 int rem_band, rem_freq, rem_rate;
1718 struct hostapd_hw_modes *mode;
1719 int idx, mode_is_set;
1720
1721 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1722 genlmsg_attrlen(gnlh, 0), NULL);
1723
1724 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1725 return NL_SKIP;
1726
1727 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1728 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1729 if (!mode)
1730 return NL_SKIP;
1731 phy_info->modes = mode;
1732
1733 mode_is_set = 0;
1734
1735 mode = &phy_info->modes[*(phy_info->num_modes)];
1736 memset(mode, 0, sizeof(*mode));
1737 *(phy_info->num_modes) += 1;
1738
1739 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1740 nla_len(nl_band), NULL);
1741
1742 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1743 mode->ht_capab = nla_get_u16(
1744 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1745 }
1746
1747 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1748 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1749 nla_len(nl_freq), freq_policy);
1750 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1751 continue;
1752 mode->num_channels++;
1753 }
1754
1755 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1756 if (!mode->channels)
1757 return NL_SKIP;
1758
1759 idx = 0;
1760
1761 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1762 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1763 nla_len(nl_freq), freq_policy);
1764 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1765 continue;
1766
1767 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1768 mode->channels[idx].flag = 0;
1769
1770 if (!mode_is_set) {
1771 /* crude heuristic */
1772 if (mode->channels[idx].freq < 4000)
1773 mode->mode = HOSTAPD_MODE_IEEE80211B;
1774 else
1775 mode->mode = HOSTAPD_MODE_IEEE80211A;
1776 mode_is_set = 1;
1777 }
1778
1779 /* crude heuristic */
1780 if (mode->channels[idx].freq < 4000)
1781 if (mode->channels[idx].freq == 2484)
1782 mode->channels[idx].chan = 14;
1783 else
1784 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1785 else
1786 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1787
1788 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1789 mode->channels[idx].flag |=
1790 HOSTAPD_CHAN_DISABLED;
1791 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1792 mode->channels[idx].flag |=
1793 HOSTAPD_CHAN_PASSIVE_SCAN;
1794 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1795 mode->channels[idx].flag |=
1796 HOSTAPD_CHAN_NO_IBSS;
1797 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1798 mode->channels[idx].flag |=
1799 HOSTAPD_CHAN_RADAR;
1800
1801 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1802 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1803 mode->channels[idx].max_tx_power =
1804 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1805
1806 idx++;
1807 }
1808
1809 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1810 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1811 nla_len(nl_rate), rate_policy);
1812 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1813 continue;
1814 mode->num_rates++;
1815 }
1816
1817 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1818 if (!mode->rates)
1819 return NL_SKIP;
1820
1821 idx = 0;
1822
1823 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1824 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1825 nla_len(nl_rate), rate_policy);
1826 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1827 continue;
1828 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1829
1830 /* crude heuristic */
1831 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1832 mode->rates[idx].rate > 200)
1833 mode->mode = HOSTAPD_MODE_IEEE80211G;
1834
1835 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1836 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1837
1838 idx++;
1839 }
1840 }
1841
1842 return NL_SKIP;
1843 }
1844
1845 static struct hostapd_hw_modes *
1846 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1847 {
1848 u16 m;
1849 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1850 int i, mode11g_idx = -1;
1851
1852 /* If only 802.11g mode is included, use it to construct matching
1853 * 802.11b mode data. */
1854
1855 for (m = 0; m < *num_modes; m++) {
1856 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1857 return modes; /* 802.11b already included */
1858 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1859 mode11g_idx = m;
1860 }
1861
1862 if (mode11g_idx < 0)
1863 return modes; /* 2.4 GHz band not supported at all */
1864
1865 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1866 if (nmodes == NULL)
1867 return modes; /* Could not add 802.11b mode */
1868
1869 mode = &nmodes[*num_modes];
1870 os_memset(mode, 0, sizeof(*mode));
1871 (*num_modes)++;
1872 modes = nmodes;
1873
1874 mode->mode = HOSTAPD_MODE_IEEE80211B;
1875
1876 mode11g = &modes[mode11g_idx];
1877 mode->num_channels = mode11g->num_channels;
1878 mode->channels = os_malloc(mode11g->num_channels *
1879 sizeof(struct hostapd_channel_data));
1880 if (mode->channels == NULL) {
1881 (*num_modes)--;
1882 return modes; /* Could not add 802.11b mode */
1883 }
1884 os_memcpy(mode->channels, mode11g->channels,
1885 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1886
1887 mode->num_rates = 0;
1888 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1889 if (mode->rates == NULL) {
1890 os_free(mode->channels);
1891 (*num_modes)--;
1892 return modes; /* Could not add 802.11b mode */
1893 }
1894
1895 for (i = 0; i < mode11g->num_rates; i++) {
1896 if (mode11g->rates[i].rate > 110 ||
1897 mode11g->rates[i].flags &
1898 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1899 continue;
1900 mode->rates[mode->num_rates] = mode11g->rates[i];
1901 mode->num_rates++;
1902 if (mode->num_rates == 4)
1903 break;
1904 }
1905
1906 if (mode->num_rates == 0) {
1907 os_free(mode->channels);
1908 os_free(mode->rates);
1909 (*num_modes)--;
1910 return modes; /* No 802.11b rates */
1911 }
1912
1913 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1914 "information");
1915
1916 return modes;
1917 }
1918
1919
1920 static struct hostapd_hw_modes *
1921 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1922 {
1923 struct wpa_driver_nl80211_data *drv = priv;
1924 struct nl_msg *msg;
1925 struct phy_info_arg result = {
1926 .num_modes = num_modes,
1927 .modes = NULL,
1928 };
1929
1930 *num_modes = 0;
1931 *flags = 0;
1932
1933 msg = nlmsg_alloc();
1934 if (!msg)
1935 return NULL;
1936
1937 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1938 0, NL80211_CMD_GET_WIPHY, 0);
1939
1940 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1941
1942 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1943 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1944 nla_put_failure:
1945 return NULL;
1946 }
1947
1948
1949 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1950 const void *data, size_t len,
1951 int encrypt)
1952 {
1953 __u8 rtap_hdr[] = {
1954 0x00, 0x00, /* radiotap version */
1955 0x0e, 0x00, /* radiotap length */
1956 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1957 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1958 0x00, /* padding */
1959 0x00, 0x00, /* RX and TX flags to indicate that */
1960 0x00, 0x00, /* this is the injected frame directly */
1961 };
1962 struct iovec iov[2] = {
1963 {
1964 .iov_base = &rtap_hdr,
1965 .iov_len = sizeof(rtap_hdr),
1966 },
1967 {
1968 .iov_base = (void *) data,
1969 .iov_len = len,
1970 }
1971 };
1972 struct msghdr msg = {
1973 .msg_name = NULL,
1974 .msg_namelen = 0,
1975 .msg_iov = iov,
1976 .msg_iovlen = 2,
1977 .msg_control = NULL,
1978 .msg_controllen = 0,
1979 .msg_flags = 0,
1980 };
1981
1982 if (encrypt)
1983 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1984
1985 return sendmsg(drv->monitor_sock, &msg, 0);
1986 }
1987
1988
1989 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1990 size_t data_len)
1991 {
1992 struct wpa_driver_nl80211_data *drv = priv;
1993 struct ieee80211_mgmt *mgmt;
1994 int do_not_encrypt = 0;
1995 u16 fc;
1996
1997 mgmt = (struct ieee80211_mgmt *) data;
1998 fc = le_to_host16(mgmt->frame_control);
1999
2000 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2001 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2002 /*
2003 * Only one of the authentication frame types is encrypted.
2004 * In order for static WEP encryption to work properly (i.e.,
2005 * to not encrypt the frame), we need to tell mac80211 about
2006 * the frames that must not be encrypted.
2007 */
2008 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2009 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2010 if (auth_alg == WLAN_AUTH_OPEN ||
2011 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2012 do_not_encrypt = 1;
2013 }
2014
2015 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2016 !do_not_encrypt);
2017 }
2018
2019
2020 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2021 const u8 *head, size_t head_len,
2022 const u8 *tail, size_t tail_len,
2023 int dtim_period)
2024 {
2025 struct wpa_driver_nl80211_data *drv = priv;
2026 struct nl_msg *msg;
2027 u8 cmd = NL80211_CMD_NEW_BEACON;
2028 int ret;
2029 int beacon_set;
2030 #ifdef HOSTAPD
2031 struct i802_bss *bss;
2032
2033 bss = get_bss(drv, ifindex);
2034 if (bss == NULL)
2035 return -ENOENT;
2036 beacon_set = bss->beacon_set;
2037 #else /* HOSTAPD */
2038 beacon_set = drv->beacon_set;
2039 #endif /* HOSTAPD */
2040
2041 msg = nlmsg_alloc();
2042 if (!msg)
2043 return -ENOMEM;
2044
2045 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2046 beacon_set);
2047 if (beacon_set)
2048 cmd = NL80211_CMD_SET_BEACON;
2049
2050 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2051 0, cmd, 0);
2052 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2053 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2054 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2055 if (!drv->beacon_int)
2056 drv->beacon_int = 100;
2057 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2058 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2059
2060 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2061 if (ret) {
2062 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2063 ret, strerror(-ret));
2064 } else {
2065 #ifdef HOSTAPD
2066 bss->beacon_set = 1;
2067 #else /* HOSTAPD */
2068 drv->beacon_set = 1;
2069 #endif /* HOSTAPD */
2070 }
2071 return ret;
2072 nla_put_failure:
2073 return -ENOBUFS;
2074 }
2075
2076
2077 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2078 {
2079 struct wpa_driver_nl80211_data *drv = priv;
2080 struct nl_msg *msg;
2081
2082 drv->beacon_int = value;
2083
2084 #ifdef HOSTAPD
2085 if (!drv->bss.beacon_set)
2086 return 0;
2087 #else /* HOSTAPD */
2088 if (!drv->beacon_set)
2089 return 0;
2090 #endif /* HOSTAPD */
2091
2092 msg = nlmsg_alloc();
2093 if (!msg)
2094 return -ENOMEM;
2095
2096 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2097 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2098 0, NL80211_CMD_SET_BEACON, 0);
2099 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2100
2101 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2102
2103 return send_and_recv_msgs(drv, msg, NULL, NULL);
2104 nla_put_failure:
2105 return -ENOBUFS;
2106 }
2107
2108 #endif /* CONFIG_AP || HOSTAPD */
2109
2110
2111 #ifdef CONFIG_AP
2112
2113 static int wpa_driver_nl80211_set_beacon(void *priv,
2114 const u8 *head, size_t head_len,
2115 const u8 *tail, size_t tail_len,
2116 int dtim_period)
2117 {
2118 struct wpa_driver_nl80211_data *drv = priv;
2119 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2120 head, head_len,
2121 tail, tail_len,
2122 dtim_period);
2123 }
2124
2125
2126 static int wpa_driver_nl80211_set_freq2(
2127 struct wpa_driver_nl80211_data *drv,
2128 struct wpa_driver_associate_params *params)
2129 {
2130 struct nl_msg *msg;
2131 int ret;
2132
2133 msg = nlmsg_alloc();
2134 if (!msg)
2135 return -1;
2136
2137 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2138 NL80211_CMD_SET_WIPHY, 0);
2139
2140 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2141
2142 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2143
2144 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2145 if (ret == 0)
2146 return 0;
2147 wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2148 "%d (%s)", params->freq, ret, strerror(-ret));
2149 nla_put_failure:
2150 return -1;
2151 }
2152
2153 #endif /* CONFIG_AP */
2154
2155 #if defined(CONFIG_AP) || defined(HOSTAPD)
2156
2157 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2158 int ifidx)
2159 {
2160 struct nl_msg *msg;
2161
2162 #ifdef HOSTAPD
2163 /* stop listening for EAPOL on this interface */
2164 del_ifidx(drv, ifidx);
2165 #endif /* HOSTAPD */
2166
2167 msg = nlmsg_alloc();
2168 if (!msg)
2169 goto nla_put_failure;
2170
2171 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2172 0, NL80211_CMD_DEL_INTERFACE, 0);
2173 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2174
2175 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2176 return;
2177 nla_put_failure:
2178 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2179 ifidx);
2180 }
2181
2182
2183 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2184 const char *ifname, enum nl80211_iftype iftype,
2185 const u8 *addr)
2186 {
2187 struct nl_msg *msg, *flags = NULL;
2188 int ifidx;
2189 int ret = -ENOBUFS;
2190 #ifdef HOSTAPD
2191 struct ifreq ifreq;
2192 struct iwreq iwr;
2193 #endif /* HOSTAPD */
2194
2195 msg = nlmsg_alloc();
2196 if (!msg)
2197 return -1;
2198
2199 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2200 0, NL80211_CMD_NEW_INTERFACE, 0);
2201 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2202 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2203 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2204
2205 if (iftype == NL80211_IFTYPE_MONITOR) {
2206 int err;
2207
2208 flags = nlmsg_alloc();
2209 if (!flags)
2210 goto nla_put_failure;
2211
2212 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2213
2214 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2215
2216 nlmsg_free(flags);
2217
2218 if (err)
2219 goto nla_put_failure;
2220 }
2221
2222 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2223 if (ret) {
2224 nla_put_failure:
2225 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2226 ifname);
2227 return ret;
2228 }
2229
2230 ifidx = if_nametoindex(ifname);
2231
2232 if (ifidx <= 0)
2233 return -1;
2234
2235 #ifdef HOSTAPD
2236 /* start listening for EAPOL on this interface */
2237 add_ifidx(drv, ifidx);
2238
2239 if (addr) {
2240 switch (iftype) {
2241 case NL80211_IFTYPE_AP:
2242 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2243 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2244 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2245
2246 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2247 nl80211_remove_iface(drv, ifidx);
2248 return -1;
2249 }
2250 break;
2251 case NL80211_IFTYPE_WDS:
2252 memset(&iwr, 0, sizeof(iwr));
2253 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2254 iwr.u.addr.sa_family = ARPHRD_ETHER;
2255 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2256 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2257 return -1;
2258 break;
2259 default:
2260 /* nothing */
2261 break;
2262 }
2263 }
2264 #endif /* HOSTAPD */
2265
2266 return ifidx;
2267 }
2268
2269 #endif /* CONFIG_AP || HOSTAPD */
2270
2271 #ifdef CONFIG_AP
2272
2273 void ap_tx_status(void *ctx, const u8 *addr,
2274 const u8 *buf, size_t len, int ack);
2275 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2276 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2277 struct hostapd_frame_info *fi);
2278 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2279
2280 #endif /* CONFIG_AP */
2281
2282 #if defined(CONFIG_AP) || defined(HOSTAPD)
2283
2284 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2285 {
2286 struct ieee80211_hdr *hdr;
2287 u16 fc, type, stype;
2288
2289 hdr = (struct ieee80211_hdr *) buf;
2290 fc = le_to_host16(hdr->frame_control);
2291
2292 type = WLAN_FC_GET_TYPE(fc);
2293 stype = WLAN_FC_GET_STYPE(fc);
2294
2295 switch (type) {
2296 case WLAN_FC_TYPE_MGMT:
2297 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2298 ok ? "ACK" : "fail");
2299 #ifdef HOSTAPD
2300 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2301 #else /* HOSTAPD */
2302 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2303 #endif /* HOSTAPD */
2304 break;
2305 case WLAN_FC_TYPE_CTRL:
2306 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2307 ok ? "ACK" : "fail");
2308 break;
2309 case WLAN_FC_TYPE_DATA:
2310 #ifdef HOSTAPD
2311 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2312 #else /* HOSTAPD */
2313 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2314 #endif /* HOSTAPD */
2315 break;
2316 default:
2317 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2318 type);
2319 break;
2320 }
2321 }
2322
2323 #endif /* CONFIG_AP || HOSTAPD */
2324
2325 #ifdef CONFIG_AP
2326
2327 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2328 u8 *buf, size_t len,
2329 struct hostapd_frame_info *hfi,
2330 enum ieee80211_msg_type msg_type)
2331 {
2332 struct ieee80211_hdr *hdr;
2333 u16 fc, type, stype;
2334 size_t data_len = len;
2335
2336 /*
2337 * PS-Poll frames are 16 bytes. All other frames are
2338 * 24 bytes or longer.
2339 */
2340 if (len < 16)
2341 return;
2342
2343 hdr = (struct ieee80211_hdr *) buf;
2344 fc = le_to_host16(hdr->frame_control);
2345
2346 type = WLAN_FC_GET_TYPE(fc);
2347 stype = WLAN_FC_GET_STYPE(fc);
2348
2349 switch (type) {
2350 case WLAN_FC_TYPE_DATA:
2351 if (len < 24)
2352 return;
2353 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2354 case WLAN_FC_TODS:
2355 break;
2356 case WLAN_FC_FROMDS:
2357 break;
2358 default:
2359 /* discard */
2360 return;
2361 }
2362 break;
2363 case WLAN_FC_TYPE_CTRL:
2364 /* discard non-ps-poll frames */
2365 if (stype != WLAN_FC_STYPE_PSPOLL)
2366 return;
2367 break;
2368 case WLAN_FC_TYPE_MGMT:
2369 break;
2370 default:
2371 /* discard */
2372 return;
2373 }
2374
2375 switch (msg_type) {
2376 case ieee80211_msg_normal:
2377 /* continue processing */
2378 break;
2379 case ieee80211_msg_tx_callback_ack:
2380 handle_tx_callback(drv->ctx, buf, data_len, 1);
2381 return;
2382 case ieee80211_msg_tx_callback_fail:
2383 handle_tx_callback(drv->ctx, buf, data_len, 0);
2384 return;
2385 }
2386
2387 switch (type) {
2388 case WLAN_FC_TYPE_MGMT:
2389 if (stype != WLAN_FC_STYPE_BEACON &&
2390 stype != WLAN_FC_STYPE_PROBE_REQ)
2391 wpa_printf(MSG_MSGDUMP, "MGMT");
2392 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2393 break;
2394 case WLAN_FC_TYPE_CTRL:
2395 /* can only get here with PS-Poll frames */
2396 wpa_printf(MSG_DEBUG, "CTRL");
2397 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2398 break;
2399 case WLAN_FC_TYPE_DATA:
2400 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2401 break;
2402 }
2403 }
2404
2405 #endif /* CONFIG_AP */
2406
2407 #if defined(CONFIG_AP) || defined(HOSTAPD)
2408
2409 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2410 {
2411 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2412 int len;
2413 unsigned char buf[3000];
2414 struct ieee80211_radiotap_iterator iter;
2415 int ret;
2416 struct hostapd_frame_info hfi;
2417 int injected = 0, failed = 0, msg_type, rxflags = 0;
2418
2419 len = recv(sock, buf, sizeof(buf), 0);
2420 if (len < 0) {
2421 perror("recv");
2422 return;
2423 }
2424
2425 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2426 printf("received invalid radiotap frame\n");
2427 return;
2428 }
2429
2430 memset(&hfi, 0, sizeof(hfi));
2431
2432 while (1) {
2433 ret = ieee80211_radiotap_iterator_next(&iter);
2434 if (ret == -ENOENT)
2435 break;
2436 if (ret) {
2437 printf("received invalid radiotap frame (%d)\n", ret);
2438 return;
2439 }
2440 switch (iter.this_arg_index) {
2441 case IEEE80211_RADIOTAP_FLAGS:
2442 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2443 len -= 4;
2444 break;
2445 case IEEE80211_RADIOTAP_RX_FLAGS:
2446 rxflags = 1;
2447 break;
2448 case IEEE80211_RADIOTAP_TX_FLAGS:
2449 injected = 1;
2450 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2451 IEEE80211_RADIOTAP_F_TX_FAIL;
2452 break;
2453 case IEEE80211_RADIOTAP_DATA_RETRIES:
2454 break;
2455 case IEEE80211_RADIOTAP_CHANNEL:
2456 /* TODO convert from freq/flags to channel number
2457 hfi.channel = XXX;
2458 hfi.phytype = XXX;
2459 */
2460 break;
2461 case IEEE80211_RADIOTAP_RATE:
2462 hfi.datarate = *iter.this_arg * 5;
2463 break;
2464 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2465 hfi.ssi_signal = *iter.this_arg;
2466 break;
2467 }
2468 }
2469
2470 if (rxflags && injected)
2471 return;
2472
2473 if (!injected)
2474 msg_type = ieee80211_msg_normal;
2475 else if (failed)
2476 msg_type = ieee80211_msg_tx_callback_fail;
2477 else
2478 msg_type = ieee80211_msg_tx_callback_ack;
2479
2480 handle_frame(drv, buf + iter.max_length,
2481 len - iter.max_length, &hfi, msg_type);
2482 }
2483
2484
2485 /*
2486 * we post-process the filter code later and rewrite
2487 * this to the offset to the last instruction
2488 */
2489 #define PASS 0xFF
2490 #define FAIL 0xFE
2491
2492 static struct sock_filter msock_filter_insns[] = {
2493 /*
2494 * do a little-endian load of the radiotap length field
2495 */
2496 /* load lower byte into A */
2497 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2498 /* put it into X (== index register) */
2499 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2500 /* load upper byte into A */
2501 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2502 /* left-shift it by 8 */
2503 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2504 /* or with X */
2505 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2506 /* put result into X */
2507 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2508
2509 /*
2510 * Allow management frames through, this also gives us those
2511 * management frames that we sent ourselves with status
2512 */
2513 /* load the lower byte of the IEEE 802.11 frame control field */
2514 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2515 /* mask off frame type and version */
2516 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2517 /* accept frame if it's both 0, fall through otherwise */
2518 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2519
2520 /*
2521 * TODO: add a bit to radiotap RX flags that indicates
2522 * that the sending station is not associated, then
2523 * add a filter here that filters on our DA and that flag
2524 * to allow us to deauth frames to that bad station.
2525 *
2526 * Not a regression -- we didn't do it before either.
2527 */
2528
2529 #if 0
2530 /*
2531 * drop non-data frames, WDS frames
2532 */
2533 /* load the lower byte of the frame control field */
2534 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2535 /* mask off QoS bit */
2536 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2537 /* drop non-data frames */
2538 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2539 /* load the upper byte of the frame control field */
2540 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2541 /* mask off toDS/fromDS */
2542 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2543 /* drop WDS frames */
2544 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2545 #endif
2546
2547 /*
2548 * add header length to index
2549 */
2550 /* load the lower byte of the frame control field */
2551 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2552 /* mask off QoS bit */
2553 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2554 /* right shift it by 6 to give 0 or 2 */
2555 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2556 /* add data frame header length */
2557 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2558 /* add index, was start of 802.11 header */
2559 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2560 /* move to index, now start of LL header */
2561 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2562
2563 /*
2564 * Accept empty data frames, we use those for
2565 * polling activity.
2566 */
2567 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2568 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2569
2570 /*
2571 * Accept EAPOL frames
2572 */
2573 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2574 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2575 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2576 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2577
2578 /* keep these last two statements or change the code below */
2579 /* return 0 == "DROP" */
2580 BPF_STMT(BPF_RET | BPF_K, 0),
2581 /* return ~0 == "keep all" */
2582 BPF_STMT(BPF_RET | BPF_K, ~0),
2583 };
2584
2585 static struct sock_fprog msock_filter = {
2586 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2587 .filter = msock_filter_insns,
2588 };
2589
2590
2591 static int add_monitor_filter(int s)
2592 {
2593 int idx;
2594
2595 /* rewrite all PASS/FAIL jump offsets */
2596 for (idx = 0; idx < msock_filter.len; idx++) {
2597 struct sock_filter *insn = &msock_filter_insns[idx];
2598
2599 if (BPF_CLASS(insn->code) == BPF_JMP) {
2600 if (insn->code == (BPF_JMP|BPF_JA)) {
2601 if (insn->k == PASS)
2602 insn->k = msock_filter.len - idx - 2;
2603 else if (insn->k == FAIL)
2604 insn->k = msock_filter.len - idx - 3;
2605 }
2606
2607 if (insn->jt == PASS)
2608 insn->jt = msock_filter.len - idx - 2;
2609 else if (insn->jt == FAIL)
2610 insn->jt = msock_filter.len - idx - 3;
2611
2612 if (insn->jf == PASS)
2613 insn->jf = msock_filter.len - idx - 2;
2614 else if (insn->jf == FAIL)
2615 insn->jf = msock_filter.len - idx - 3;
2616 }
2617 }
2618
2619 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2620 &msock_filter, sizeof(msock_filter))) {
2621 perror("SO_ATTACH_FILTER");
2622 return -1;
2623 }
2624
2625 return 0;
2626 }
2627
2628
2629 static int
2630 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2631 {
2632 char buf[IFNAMSIZ];
2633 struct sockaddr_ll ll;
2634 int optval;
2635 socklen_t optlen;
2636
2637 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2638 buf[IFNAMSIZ - 1] = '\0';
2639
2640 drv->monitor_ifidx =
2641 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2642
2643 if (drv->monitor_ifidx < 0)
2644 return -1;
2645
2646 if (hostapd_set_iface_flags(drv, buf, 1))
2647 goto error;
2648
2649 memset(&ll, 0, sizeof(ll));
2650 ll.sll_family = AF_PACKET;
2651 ll.sll_ifindex = drv->monitor_ifidx;
2652 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2653 if (drv->monitor_sock < 0) {
2654 perror("socket[PF_PACKET,SOCK_RAW]");
2655 goto error;
2656 }
2657
2658 if (add_monitor_filter(drv->monitor_sock)) {
2659 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2660 "interface; do filtering in user space");
2661 /* This works, but will cost in performance. */
2662 }
2663
2664 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2665 perror("monitor socket bind");
2666 goto error;
2667 }
2668
2669 optlen = sizeof(optval);
2670 optval = 20;
2671 if (setsockopt
2672 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2673 perror("Failed to set socket priority");
2674 goto error;
2675 }
2676
2677 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2678 drv, NULL)) {
2679 printf("Could not register monitor read socket\n");
2680 goto error;
2681 }
2682
2683 return 0;
2684 error:
2685 nl80211_remove_iface(drv, drv->monitor_ifidx);
2686 return -1;
2687 }
2688
2689 #endif /* CONFIG_AP || HOSTAPD */
2690
2691 #ifdef CONFIG_AP
2692
2693 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2694 struct wpa_driver_associate_params *params)
2695 {
2696 if (drv->monitor_ifidx < 0 &&
2697 nl80211_create_monitor_interface(drv))
2698 return -1;
2699
2700 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2701 wpa_driver_nl80211_set_freq2(drv, params)) {
2702 nl80211_remove_iface(drv, drv->monitor_ifidx);
2703 drv->monitor_ifidx = -1;
2704 return -1;
2705 }
2706
2707 /* TODO: setup monitor interface (and add code somewhere to remove this
2708 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2709
2710 return 0;
2711 }
2712 #endif /* CONFIG_AP */
2713
2714
2715 static int wpa_driver_nl80211_associate(
2716 void *priv, struct wpa_driver_associate_params *params)
2717 {
2718 struct wpa_driver_nl80211_data *drv = priv;
2719 int ret = -1;
2720 struct nl_msg *msg;
2721
2722 #ifdef CONFIG_AP
2723 if (params->mode == 2)
2724 return wpa_driver_nl80211_ap(drv, params);
2725 #endif /* CONFIG_AP */
2726
2727 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2728 params->drop_unencrypted);
2729
2730 drv->associated = 0;
2731
2732 msg = nlmsg_alloc();
2733 if (!msg)
2734 return -1;
2735
2736 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2737 drv->ifindex);
2738 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2739 NL80211_CMD_ASSOCIATE, 0);
2740
2741 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2742 if (params->bssid) {
2743 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2744 MAC2STR(params->bssid));
2745 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2746 }
2747 if (params->freq) {
2748 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2749 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2750 }
2751 if (params->ssid) {
2752 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2753 params->ssid, params->ssid_len);
2754 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2755 params->ssid);
2756 if (params->ssid_len > sizeof(drv->ssid))
2757 goto nla_put_failure;
2758 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2759 drv->ssid_len = params->ssid_len;
2760 }
2761 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2762 if (params->wpa_ie)
2763 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2764 params->wpa_ie);
2765
2766 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2767 msg = NULL;
2768 if (ret) {
2769 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2770 "(%s)", ret, strerror(-ret));
2771 goto nla_put_failure;
2772 }
2773 ret = 0;
2774 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2775 "successfully");
2776
2777 nla_put_failure:
2778 nlmsg_free(msg);
2779 return ret;
2780 }
2781
2782
2783 /**
2784 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2785 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2786 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2787 * Returns: 0 on success, -1 on failure
2788 */
2789 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2790 int mode)
2791 {
2792 int ret = -1;
2793 struct nl_msg *msg;
2794 int nlmode;
2795
2796 switch (mode) {
2797 case 0:
2798 nlmode = NL80211_IFTYPE_STATION;
2799 break;
2800 case 1:
2801 nlmode = NL80211_IFTYPE_ADHOC;
2802 break;
2803 case 2:
2804 nlmode = NL80211_IFTYPE_AP;
2805 break;
2806 default:
2807 return -1;
2808 }
2809
2810 msg = nlmsg_alloc();
2811 if (!msg)
2812 return -1;
2813
2814 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2815 0, NL80211_CMD_SET_INTERFACE, 0);
2816 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2817 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2818
2819 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2820 if (!ret)
2821 return 0;
2822 else
2823 goto try_again;
2824
2825 nla_put_failure:
2826 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2827 ret, strerror(-ret));
2828 return -1;
2829
2830 try_again:
2831 /* mac80211 doesn't allow mode changes while the device is up, so
2832 * take the device down, try to set the mode again, and bring the
2833 * device back up.
2834 */
2835 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2836 /* Try to set the mode again while the interface is down */
2837 msg = nlmsg_alloc();
2838 if (!msg)
2839 return -1;
2840
2841 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2842 0, NL80211_CMD_SET_INTERFACE, 0);
2843 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2844 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2845 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2846 if (ret) {
2847 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2848 "mode(try_again): %d (%s)",
2849 drv->ifname, ret, strerror(-ret));
2850 }
2851
2852 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2853 ret = -1;
2854 }
2855
2856 return ret;
2857 }
2858
2859
2860 static int wpa_driver_nl80211_get_capa(void *priv,
2861 struct wpa_driver_capa *capa)
2862 {
2863 struct wpa_driver_nl80211_data *drv = priv;
2864 if (!drv->has_capability)
2865 return -1;
2866 os_memcpy(capa, &drv->capa, sizeof(*capa));
2867 return 0;
2868 }
2869
2870
2871 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2872 {
2873 struct wpa_driver_nl80211_data *drv = priv;
2874
2875 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2876 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2877 drv->operstate = state;
2878 return wpa_driver_nl80211_send_oper_ifla(
2879 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2880 }
2881
2882
2883 #ifdef HOSTAPD
2884
2885 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2886
2887 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2888 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2889
2890
2891 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2892 int ifindex)
2893 {
2894 struct i802_bss *bss = &drv->bss;
2895 while (bss) {
2896 if (ifindex == bss->ifindex)
2897 return bss;
2898 bss = bss->next;
2899 }
2900 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2901 return NULL;
2902 }
2903
2904
2905 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2906 {
2907 int i;
2908 int *old;
2909
2910 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2911 ifidx);
2912 for (i = 0; i < drv->num_if_indices; i++) {
2913 if (drv->if_indices[i] == 0) {
2914 drv->if_indices[i] = ifidx;
2915 return;
2916 }
2917 }
2918
2919 if (drv->if_indices != drv->default_if_indices)
2920 old = drv->if_indices;
2921 else
2922 old = NULL;
2923
2924 drv->if_indices = realloc(old,
2925 sizeof(int) * (drv->num_if_indices + 1));
2926 if (!drv->if_indices) {
2927 if (!old)
2928 drv->if_indices = drv->default_if_indices;
2929 else
2930 drv->if_indices = old;
2931 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2932 "interfaces");
2933 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2934 return;
2935 }
2936 drv->if_indices[drv->num_if_indices] = ifidx;
2937 drv->num_if_indices++;
2938 }
2939
2940
2941 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2942 {
2943 int i;
2944
2945 for (i = 0; i < drv->num_if_indices; i++) {
2946 if (drv->if_indices[i] == ifidx) {
2947 drv->if_indices[i] = 0;
2948 break;
2949 }
2950 }
2951 }
2952
2953
2954 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2955 {
2956 int i;
2957
2958 for (i = 0; i < drv->num_if_indices; i++)
2959 if (drv->if_indices[i] == ifidx)
2960 return 1;
2961
2962 return 0;
2963 }
2964
2965
2966 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2967 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2968 size_t seq_len, const u8 *key, size_t key_len)
2969 {
2970 struct wpa_driver_nl80211_data *drv = priv;
2971 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2972 set_tx, seq, seq_len, key, key_len);
2973 }
2974
2975
2976 static inline int min_int(int a, int b)
2977 {
2978 if (a < b)
2979 return a;
2980 return b;
2981 }
2982
2983
2984 static int get_key_handler(struct nl_msg *msg, void *arg)
2985 {
2986 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2987 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2988
2989 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2990 genlmsg_attrlen(gnlh, 0), NULL);
2991
2992 /*
2993 * TODO: validate the key index and mac address!
2994 * Otherwise, there's a race condition as soon as
2995 * the kernel starts sending key notifications.
2996 */
2997
2998 if (tb[NL80211_ATTR_KEY_SEQ])
2999 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3000 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3001 return NL_SKIP;
3002 }
3003
3004
3005 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3006 int idx, u8 *seq)
3007 {
3008 struct wpa_driver_nl80211_data *drv = priv;
3009 struct nl_msg *msg;
3010
3011 msg = nlmsg_alloc();
3012 if (!msg)
3013 return -ENOMEM;
3014
3015 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3016 0, NL80211_CMD_GET_KEY, 0);
3017
3018 if (addr)
3019 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3020 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3021 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3022
3023 memset(seq, 0, 6);
3024
3025 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3026 nla_put_failure:
3027 return -ENOBUFS;
3028 }
3029
3030
3031 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3032 int mode)
3033 {
3034 struct wpa_driver_nl80211_data *drv = priv;
3035 struct nl_msg *msg;
3036 u8 rates[NL80211_MAX_SUPP_RATES];
3037 u8 rates_len = 0;
3038 int i;
3039
3040 msg = nlmsg_alloc();
3041 if (!msg)
3042 return -ENOMEM;
3043
3044 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3045 NL80211_CMD_SET_BSS, 0);
3046
3047 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3048 rates[rates_len++] = basic_rates[i] / 5;
3049
3050 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3051
3052 /* TODO: multi-BSS support */
3053 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3054
3055 return send_and_recv_msgs(drv, msg, NULL, NULL);
3056 nla_put_failure:
3057 return -ENOBUFS;
3058 }
3059
3060
3061 /* Set kernel driver on given frequency (MHz) */
3062 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3063 {
3064 struct wpa_driver_nl80211_data *drv = priv;
3065 struct nl_msg *msg;
3066
3067 msg = nlmsg_alloc();
3068 if (!msg)
3069 return -1;
3070
3071 drv->last_freq = freq->freq;
3072 drv->last_freq_ht = freq->ht_enabled;
3073
3074 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3075 NL80211_CMD_SET_WIPHY, 0);
3076
3077 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3078 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3079 if (freq->ht_enabled) {
3080 switch (freq->sec_channel_offset) {
3081 case -1:
3082 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3083 NL80211_CHAN_HT40MINUS);
3084 break;
3085 case 1:
3086 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3087 NL80211_CHAN_HT40PLUS);
3088 break;
3089 default:
3090 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3091 NL80211_CHAN_HT20);
3092 break;
3093 }
3094 }
3095
3096 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3097 return 0;
3098 nla_put_failure:
3099 return -1;
3100 }
3101
3102
3103 static int i802_set_rts(void *priv, int rts)
3104 {
3105 struct wpa_driver_nl80211_data *drv = priv;
3106 struct iwreq iwr;
3107
3108 memset(&iwr, 0, sizeof(iwr));
3109 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3110 iwr.u.rts.value = rts;
3111 iwr.u.rts.fixed = 1;
3112
3113 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3114 perror("ioctl[SIOCSIWRTS]");
3115 return -1;
3116 }
3117
3118 return 0;
3119 }
3120
3121
3122 static int i802_set_frag(void *priv, int frag)
3123 {
3124 struct wpa_driver_nl80211_data *drv = priv;
3125 struct iwreq iwr;
3126
3127 memset(&iwr, 0, sizeof(iwr));
3128 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3129 iwr.u.frag.value = frag;
3130 iwr.u.frag.fixed = 1;
3131
3132 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3133 perror("ioctl[SIOCSIWFRAG]");
3134 return -1;
3135 }
3136
3137 return 0;
3138 }
3139
3140
3141 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3142 {
3143 struct wpa_driver_nl80211_data *drv = priv;
3144 struct iwreq iwr;
3145
3146 memset(&iwr, 0, sizeof(iwr));
3147 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3148
3149 iwr.u.retry.value = short_retry;
3150 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3151 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3152 perror("ioctl[SIOCSIWRETRY(short)]");
3153 return -1;
3154 }
3155
3156 iwr.u.retry.value = long_retry;
3157 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3158 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3159 perror("ioctl[SIOCSIWRETRY(long)]");
3160 return -1;
3161 }
3162
3163 return 0;
3164 }
3165
3166
3167 static int i802_flush(void *priv)
3168 {
3169 struct wpa_driver_nl80211_data *drv = priv;
3170 struct nl_msg *msg;
3171
3172 msg = nlmsg_alloc();
3173 if (!msg)
3174 return -1;
3175
3176 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3177 0, NL80211_CMD_DEL_STATION, 0);
3178
3179 /*
3180 * XXX: FIX! this needs to flush all VLANs too
3181 */
3182 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3183 if_nametoindex(drv->ifname));
3184
3185 return send_and_recv_msgs(drv, msg, NULL, NULL);
3186 nla_put_failure:
3187 return -ENOBUFS;
3188 }
3189
3190
3191 static int get_sta_handler(struct nl_msg *msg, void *arg)
3192 {
3193 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3194 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3195 struct hostap_sta_driver_data *data = arg;
3196 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3197 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3198 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3199 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3200 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3201 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3202 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3203 };
3204
3205 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3206 genlmsg_attrlen(gnlh, 0), NULL);
3207
3208 /*
3209 * TODO: validate the interface and mac address!
3210 * Otherwise, there's a race condition as soon as
3211 * the kernel starts sending station notifications.
3212 */
3213
3214 if (!tb[NL80211_ATTR_STA_INFO]) {
3215 wpa_printf(MSG_DEBUG, "sta stats missing!");
3216 return NL_SKIP;
3217 }
3218 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3219 tb[NL80211_ATTR_STA_INFO],
3220 stats_policy)) {
3221 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3222 return NL_SKIP;
3223 }
3224
3225 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3226 data->inactive_msec =
3227 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3228 if (stats[NL80211_STA_INFO_RX_BYTES])
3229 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3230 if (stats[NL80211_STA_INFO_TX_BYTES])
3231 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3232 if (stats[NL80211_STA_INFO_RX_PACKETS])
3233 data->rx_packets =
3234 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3235 if (stats[NL80211_STA_INFO_TX_PACKETS])
3236 data->tx_packets =
3237 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3238
3239 return NL_SKIP;
3240 }
3241
3242 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3243 const u8 *addr)
3244 {
3245 struct wpa_driver_nl80211_data *drv = priv;
3246 struct nl_msg *msg;
3247
3248 os_memset(data, 0, sizeof(*data));
3249 msg = nlmsg_alloc();
3250 if (!msg)
3251 return -ENOMEM;
3252
3253 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3254 0, NL80211_CMD_GET_STATION, 0);
3255
3256 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3257 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3258
3259 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3260 nla_put_failure:
3261 return -ENOBUFS;
3262 }
3263
3264
3265 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3266 size_t data_len, int encrypt, const u8 *own_addr)
3267 {
3268 struct wpa_driver_nl80211_data *drv = priv;
3269 struct ieee80211_hdr *hdr;
3270 size_t len;
3271 u8 *pos;
3272 int res;
3273 #if 0 /* FIX */
3274 int qos = sta->flags & WLAN_STA_WME;
3275 #else
3276 int qos = 0;
3277 #endif
3278
3279 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3280 data_len;
3281 hdr = os_zalloc(len);
3282 if (hdr == NULL) {
3283 printf("malloc() failed for i802_send_data(len=%lu)\n",
3284 (unsigned long) len);
3285 return -1;
3286 }
3287
3288 hdr->frame_control =
3289 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3290 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3291 if (encrypt)
3292 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3293 #if 0 /* To be enabled if qos determination is added above */
3294 if (qos) {
3295 hdr->frame_control |=
3296 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3297 }
3298 #endif
3299
3300 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3301 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3302 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3303 pos = (u8 *) (hdr + 1);
3304
3305 #if 0 /* To be enabled if qos determination is added above */
3306 if (qos) {
3307 /* add an empty QoS header if needed */
3308 pos[0] = 0;
3309 pos[1] = 0;
3310 pos += 2;
3311 }
3312 #endif
3313
3314 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3315 pos += sizeof(rfc1042_header);
3316 WPA_PUT_BE16(pos, ETH_P_PAE);
3317 pos += 2;
3318 memcpy(pos, data, data_len);
3319
3320 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3321 if (res < 0) {
3322 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3323 "failed: %d (%s)",
3324 (unsigned long) len, errno, strerror(errno));
3325 }
3326 free(hdr);
3327
3328 return res;
3329 }
3330
3331
3332 static int i802_sta_add(const char *ifname, void *priv,
3333 struct hostapd_sta_add_params *params)
3334 {
3335 struct wpa_driver_nl80211_data *drv = priv;
3336 struct nl_msg *msg;
3337 int ret = -ENOBUFS;
3338
3339 msg = nlmsg_alloc();
3340 if (!msg)
3341 return -ENOMEM;
3342
3343 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3344 0, NL80211_CMD_NEW_STATION, 0);
3345
3346 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3347 if_nametoindex(drv->ifname));
3348 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3349 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3350 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3351 params->supp_rates);
3352 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3353 params->listen_interval);
3354
3355 #ifdef CONFIG_IEEE80211N
3356 if (params->ht_capabilities) {
3357 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3358 params->ht_capabilities->length,
3359 &params->ht_capabilities->data);
3360 }
3361 #endif /* CONFIG_IEEE80211N */
3362
3363 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3364 if (ret)
3365 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3366 "result: %d (%s)", ret, strerror(-ret));
3367 if (ret == -EEXIST)
3368 ret = 0;
3369 nla_put_failure:
3370 return ret;
3371 }
3372
3373
3374 static int i802_sta_remove(void *priv, const u8 *addr)
3375 {
3376 struct wpa_driver_nl80211_data *drv = priv;
3377 struct nl_msg *msg;
3378 int ret;
3379
3380 msg = nlmsg_alloc();
3381 if (!msg)
3382 return -ENOMEM;
3383
3384 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3385 0, NL80211_CMD_DEL_STATION, 0);
3386
3387 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3388 if_nametoindex(drv->ifname));
3389 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3390
3391 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3392 if (ret == -ENOENT)
3393 return 0;
3394 return ret;
3395 nla_put_failure:
3396 return -ENOBUFS;
3397 }
3398
3399
3400 static int i802_sta_set_flags(void *priv, const u8 *addr,
3401 int total_flags, int flags_or, int flags_and)
3402 {
3403 struct wpa_driver_nl80211_data *drv = priv;
3404 struct nl_msg *msg, *flags = NULL;
3405
3406 msg = nlmsg_alloc();
3407 if (!msg)
3408 return -ENOMEM;
3409
3410 flags = nlmsg_alloc();
3411 if (!flags) {
3412 nlmsg_free(msg);
3413 return -ENOMEM;
3414 }
3415
3416 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3417 0, NL80211_CMD_SET_STATION, 0);
3418
3419 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3420 if_nametoindex(drv->ifname));
3421 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3422
3423 if (total_flags & WLAN_STA_AUTHORIZED)
3424 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3425
3426 if (total_flags & WLAN_STA_WMM)
3427 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3428
3429 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3430 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3431
3432 if (total_flags & WLAN_STA_MFP)
3433 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3434
3435 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3436 goto nla_put_failure;
3437
3438 nlmsg_free(flags);
3439
3440 return send_and_recv_msgs(drv, msg, NULL, NULL);
3441 nla_put_failure:
3442 nlmsg_free(flags);
3443 return -ENOBUFS;
3444 }
3445
3446
3447 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3448 int cw_min, int cw_max, int burst_time)
3449 {
3450 struct wpa_driver_nl80211_data *drv = priv;
3451 struct nl_msg *msg;
3452 struct nlattr *txq, *params;
3453
3454 msg = nlmsg_alloc();
3455 if (!msg)
3456 return -1;
3457
3458 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3459 0, NL80211_CMD_SET_WIPHY, 0);
3460
3461 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3462
3463 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3464 if (!txq)
3465 goto nla_put_failure;
3466
3467 /* We are only sending parameters for a single TXQ at a time */
3468 params = nla_nest_start(msg, 1);
3469 if (!params)
3470 goto nla_put_failure;
3471
3472 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3473 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3474 * 32 usec, so need to convert the value here. */
3475 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3476 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3477 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3478 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3479
3480 nla_nest_end(msg, params);
3481
3482 nla_nest_end(msg, txq);
3483
3484 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3485 return 0;
3486 nla_put_failure:
3487 return -1;
3488 }
3489
3490
3491 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3492 {
3493 struct wpa_driver_nl80211_data *drv = priv;
3494 int ifidx;
3495 struct i802_bss *bss;
3496
3497 bss = os_zalloc(sizeof(*bss));
3498 if (bss == NULL)
3499 return -1;
3500 bss->ifindex = if_nametoindex(ifname);
3501
3502 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3503 if (ifidx < 0) {
3504 os_free(bss);
3505 return -1;
3506 }
3507 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3508 nl80211_remove_iface(priv, ifidx);
3509 os_free(bss);
3510 return -1;
3511 }
3512 bss->next = drv->bss.next;
3513 drv->bss.next = bss;
3514 return 0;
3515 }
3516
3517
3518 static int i802_bss_remove(void *priv, const char *ifname)
3519 {
3520 struct wpa_driver_nl80211_data *drv = priv;
3521 struct i802_bss *bss, *prev;
3522 int ifindex = if_nametoindex(ifname);
3523 nl80211_remove_iface(priv, ifindex);
3524 prev = &drv->bss;
3525 bss = drv->bss.next;
3526 while (bss) {
3527 if (ifindex == bss->ifindex) {
3528 prev->next = bss->next;
3529 os_free(bss);
3530 break;
3531 }
3532 prev = bss;
3533 bss = bss->next;
3534 }
3535 return 0;
3536 }
3537
3538
3539 static int i802_set_beacon(const char *iface, void *priv,
3540 const u8 *head, size_t head_len,
3541 const u8 *tail, size_t tail_len, int dtim_period)
3542 {
3543 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3544 head, head_len,
3545 tail, tail_len,
3546 dtim_period);
3547 }
3548
3549
3550 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3551 {
3552 struct nl_msg *msg;
3553
3554 msg = nlmsg_alloc();
3555 if (!msg)
3556 return -ENOMEM;
3557
3558 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3559 0, NL80211_CMD_DEL_BEACON, 0);
3560 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3561
3562 return send_and_recv_msgs(drv, msg, NULL, NULL);
3563 nla_put_failure:
3564 return -ENOBUFS;
3565 }
3566
3567
3568 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3569 {
3570 struct wpa_driver_nl80211_data *drv = priv;
3571 struct nl_msg *msg;
3572
3573 msg = nlmsg_alloc();
3574 if (!msg)
3575 return -ENOMEM;
3576
3577 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3578 NL80211_CMD_SET_BSS, 0);
3579
3580 if (cts >= 0)
3581 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3582 if (preamble >= 0)
3583 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3584 if (slot >= 0)
3585 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3586
3587 /* TODO: multi-BSS support */
3588 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3589
3590 return send_and_recv_msgs(drv, msg, NULL, NULL);
3591 nla_put_failure:
3592 return -ENOBUFS;
3593 }
3594
3595
3596 static int i802_set_cts_protect(void *priv, int value)
3597 {
3598 return i802_set_bss(priv, value, -1, -1);
3599 }
3600
3601
3602 static int i802_set_preamble(void *priv, int value)
3603 {
3604 return i802_set_bss(priv, -1, value, -1);
3605 }
3606
3607
3608 static int i802_set_short_slot_time(void *priv, int value)
3609 {
3610 return i802_set_bss(priv, -1, -1, value);
3611 }
3612
3613
3614 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3615 {
3616 switch (type) {
3617 case HOSTAPD_IF_VLAN:
3618 return NL80211_IFTYPE_AP_VLAN;
3619 case HOSTAPD_IF_WDS:
3620 return NL80211_IFTYPE_WDS;
3621 }
3622 return -1;
3623 }
3624
3625
3626 static int i802_if_add(const char *iface, void *priv,
3627 enum hostapd_driver_if_type type, char *ifname,
3628 const u8 *addr)
3629 {
3630 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3631 return -1;
3632 return 0;
3633 }
3634
3635
3636 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3637 char *ifname, const u8 *addr)
3638 {
3639 /* unused at the moment */
3640 return -1;
3641 }
3642
3643
3644 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3645 const char *ifname, const u8 *addr)
3646 {
3647 nl80211_remove_iface(priv, if_nametoindex(ifname));
3648 return 0;
3649 }
3650
3651
3652 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3653 const char *ifname, int vlan_id)
3654 {
3655 struct wpa_driver_nl80211_data *drv = priv;
3656 struct nl_msg *msg;
3657
3658 msg = nlmsg_alloc();
3659 if (!msg)
3660 return -ENOMEM;
3661
3662 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3663 0, NL80211_CMD_SET_STATION, 0);
3664
3665 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3666 if_nametoindex(drv->ifname));
3667 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3668 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3669 if_nametoindex(ifname));
3670
3671 return send_and_recv_msgs(drv, msg, NULL, NULL);
3672 nla_put_failure:
3673 return -ENOBUFS;
3674 }
3675
3676
3677 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3678 u8 *buf, size_t len,
3679 struct hostapd_frame_info *hfi,
3680 enum ieee80211_msg_type msg_type)
3681 {
3682 struct hostapd_iface *iface = drv->hapd->iface;
3683 struct ieee80211_hdr *hdr;
3684 u16 fc, type, stype;
3685 size_t data_len = len;
3686 struct hostapd_data *hapd = NULL;
3687 int broadcast_bssid = 0;
3688 size_t i;
3689 u8 *bssid;
3690
3691 /*
3692 * PS-Poll frames are 16 bytes. All other frames are
3693 * 24 bytes or longer.
3694 */
3695 if (len < 16)
3696 return;
3697
3698 hdr = (struct ieee80211_hdr *) buf;
3699 fc = le_to_host16(hdr->frame_control);
3700
3701 type = WLAN_FC_GET_TYPE(fc);
3702 stype = WLAN_FC_GET_STYPE(fc);
3703
3704 switch (type) {
3705 case WLAN_FC_TYPE_DATA:
3706 if (len < 24)
3707 return;
3708 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3709 case WLAN_FC_TODS:
3710 bssid = hdr->addr1;
3711 break;
3712 case WLAN_FC_FROMDS:
3713 bssid = hdr->addr2;
3714 break;
3715 default:
3716 /* discard */
3717 return;
3718 }
3719 break;
3720 case WLAN_FC_TYPE_CTRL:
3721 /* discard non-ps-poll frames */
3722 if (stype != WLAN_FC_STYPE_PSPOLL)
3723 return;
3724 bssid = hdr->addr1;
3725 break;
3726 case WLAN_FC_TYPE_MGMT:
3727 bssid = hdr->addr3;
3728 break;
3729 default:
3730 /* discard */
3731 return;
3732 }
3733
3734 /* find interface frame belongs to */
3735 for (i = 0; i < iface->num_bss; i++) {
3736 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3737 hapd = iface->bss[i];
3738 break;
3739 }
3740 }
3741
3742 if (hapd == NULL) {
3743 hapd = iface->bss[0];
3744
3745 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3746 bssid[2] != 0xff || bssid[3] != 0xff ||
3747 bssid[4] != 0xff || bssid[5] != 0xff) {
3748 /*
3749 * Unknown BSSID - drop frame if this is not from
3750 * passive scanning or a beacon (at least ProbeReq
3751 * frames to other APs may be allowed through RX
3752 * filtering in the wlan hw/driver)
3753 */
3754 if ((type != WLAN_FC_TYPE_MGMT ||
3755 stype != WLAN_FC_STYPE_BEACON))
3756 return;
3757 } else
3758 broadcast_bssid = 1;
3759 }
3760
3761 switch (msg_type) {
3762 case ieee80211_msg_normal:
3763 /* continue processing */
3764 break;
3765 case ieee80211_msg_tx_callback_ack:
3766 handle_tx_callback(hapd, buf, data_len, 1);
3767 return;
3768 case ieee80211_msg_tx_callback_fail:
3769 handle_tx_callback(hapd, buf, data_len, 0);
3770 return;
3771 }
3772
3773 switch (type) {
3774 case WLAN_FC_TYPE_MGMT:
3775 if (stype != WLAN_FC_STYPE_BEACON &&
3776 stype != WLAN_FC_STYPE_PROBE_REQ)
3777 wpa_printf(MSG_MSGDUMP, "MGMT");
3778 if (broadcast_bssid) {
3779 for (i = 0; i < iface->num_bss; i++)
3780 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3781 stype, hfi);
3782 } else
3783 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3784 break;
3785 case WLAN_FC_TYPE_CTRL:
3786 /* can only get here with PS-Poll frames */
3787 wpa_printf(MSG_DEBUG, "CTRL");
3788 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3789 break;
3790 case WLAN_FC_TYPE_DATA:
3791 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3792 break;
3793 }
3794 }
3795
3796
3797 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3798 {
3799 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3800 struct sockaddr_ll lladdr;
3801 unsigned char buf[3000];
3802 int len;
3803 socklen_t fromlen = sizeof(lladdr);
3804
3805 len = recvfrom(sock, buf, sizeof(buf), 0,
3806 (struct sockaddr *)&lladdr, &fromlen);
3807 if (len < 0) {
3808 perror("recv");
3809 return;
3810 }
3811
3812 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3813 struct hostapd_data *hapd;
3814 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3815 if (!hapd)
3816 return;
3817 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3818 }
3819 }
3820
3821
3822 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3823 int mode)
3824 {
3825 struct nl_msg *msg;
3826 int ret = -ENOBUFS;
3827
3828 msg = nlmsg_alloc();
3829 if (!msg)
3830 return -ENOMEM;
3831
3832 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3833 0, NL80211_CMD_SET_INTERFACE, 0);
3834 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3835 if_nametoindex(ifname));
3836 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3837
3838 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3839 if (!ret)
3840 return 0;
3841 nla_put_failure:
3842 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3843 "mode.", ifname);
3844 return ret;
3845 }
3846
3847
3848 #ifdef CONFIG_IEEE80211N
3849 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3850 int freq, u8 *ie, size_t ie_len)
3851 {
3852 struct ieee802_11_elems elems;
3853 int ht, pri_chan = 0, sec_chan = 0;
3854 struct ieee80211_ht_operation *oper;
3855 struct hostapd_neighbor_bss *nnei;
3856
3857 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3858 ht = elems.ht_capabilities || elems.ht_operation;
3859 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3860 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3861 pri_chan = oper->control_chan;
3862 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3863 if (oper->ht_param &
3864 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3865 sec_chan = pri_chan + 4;
3866 else if (oper->ht_param &
3867 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3868 sec_chan = pri_chan - 4;
3869 }
3870 }
3871
3872 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3873 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3874 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3875
3876 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3877 sizeof(struct hostapd_neighbor_bss));
3878 if (nnei == NULL)
3879 return;
3880 drv->neighbors = nnei;
3881 nnei = &nnei[drv->num_neighbors];
3882 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3883 nnei->freq = freq;
3884 nnei->ht = !!ht;
3885 nnei->pri_chan = pri_chan;
3886 nnei->sec_chan = sec_chan;
3887 drv->num_neighbors++;
3888 }
3889
3890
3891 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3892 {
3893 int divi = 1000000, i;
3894
3895 if (iwe->u.freq.e == 0) {
3896 /*
3897 * Some drivers do not report frequency, but a channel.
3898 * Try to map this to frequency by assuming they are using
3899 * IEEE 802.11b/g. But don't overwrite a previously parsed
3900 * frequency if the driver sends both frequency and channel,
3901 * since the driver may be sending an A-band channel that we
3902 * don't handle here.
3903 */
3904
3905 if (*freq)
3906 return 0;
3907
3908 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3909 *freq = 2407 + 5 * iwe->u.freq.m;
3910 return 0;
3911 } else if (iwe->u.freq.m == 14) {
3912 *freq = 2484;
3913 return 0;
3914 }
3915 }
3916
3917 if (iwe->u.freq.e > 6) {
3918 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3919 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3920 return -1;
3921 }
3922
3923 for (i = 0; i < iwe->u.freq.e; i++)
3924 divi /= 10;
3925 *freq = iwe->u.freq.m / divi;
3926 return 0;
3927 }
3928
3929
3930 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3931 size_t len)
3932 {
3933 size_t ap_num = 0;
3934 int first;
3935 struct iw_event iwe_buf, *iwe = &iwe_buf;
3936 char *pos, *end, *custom;
3937 u8 bssid[ETH_ALEN];
3938 int freq = 0;
3939 u8 *ie = NULL;
3940 size_t ie_len = 0;
3941
3942 ap_num = 0;
3943 first = 1;
3944
3945 pos = (char *) res_buf;
3946 end = (char *) res_buf + len;
3947
3948 while (pos + IW_EV_LCP_LEN <= end) {
3949 /* Event data may be unaligned, so make a local, aligned copy
3950 * before processing. */
3951 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3952 if (iwe->len <= IW_EV_LCP_LEN)
3953 break;
3954
3955 custom = pos + IW_EV_POINT_LEN;
3956 if (iwe->cmd == IWEVGENIE) {
3957 /* WE-19 removed the pointer from struct iw_point */
3958 char *dpos = (char *) &iwe_buf.u.data.length;
3959 int dlen = dpos - (char *) &iwe_buf;
3960 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3961 sizeof(struct iw_event) - dlen);
3962 } else {
3963 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3964 custom += IW_EV_POINT_OFF;
3965 }
3966
3967 switch (iwe->cmd) {
3968 case SIOCGIWAP:
3969 if (!first)
3970 i802_add_neighbor(drv, bssid, freq, ie,
3971 ie_len);
3972 first = 0;
3973 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3974 freq = 0;
3975 ie = NULL;
3976 ie_len = 0;
3977 break;
3978 case SIOCGIWFREQ:
3979 i802_get_scan_freq(iwe, &freq);
3980 break;
3981 case IWEVGENIE:
3982 if (custom + iwe->u.data.length > end) {
3983 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3984 return -1;
3985 }
3986 ie = (u8 *) custom;
3987 ie_len = iwe->u.data.length;
3988 break;
3989 }
3990
3991 pos += iwe->len;
3992 }
3993
3994 if (!first)
3995 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3996
3997 return 0;
3998 }
3999
4000
4001 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4002 {
4003 struct iwreq iwr;
4004 u8 *res_buf;
4005 size_t res_buf_len;
4006 int res;
4007
4008 res_buf_len = IW_SCAN_MAX_DATA;
4009 for (;;) {
4010 res_buf = os_malloc(res_buf_len);
4011 if (res_buf == NULL)
4012 return -1;
4013 os_memset(&iwr, 0, sizeof(iwr));
4014 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4015 iwr.u.data.pointer = res_buf;
4016 iwr.u.data.length = res_buf_len;
4017
4018 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4019 break;
4020
4021 if (errno == E2BIG && res_buf_len < 65535) {
4022 os_free(res_buf);
4023 res_buf = NULL;
4024 res_buf_len *= 2;
4025 if (res_buf_len > 65535)
4026 res_buf_len = 65535; /* 16-bit length field */
4027 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4028 "trying larger buffer (%lu bytes)",
4029 (unsigned long) res_buf_len);
4030 } else {
4031 perror("ioctl[SIOCGIWSCAN]");
4032 os_free(res_buf);
4033 return -1;
4034 }
4035 }
4036
4037 if (iwr.u.data.length > res_buf_len) {
4038 os_free(res_buf);
4039 return -1;
4040 }
4041
4042 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4043 os_free(res_buf);
4044
4045 return res;
4046 }
4047
4048
4049 static int i802_is_event_wireless_scan_complete(char *data, int len)
4050 {
4051 struct iw_event iwe_buf, *iwe = &iwe_buf;
4052 char *pos, *end;
4053
4054 pos = data;
4055 end = data + len;
4056
4057 while (pos + IW_EV_LCP_LEN <= end) {
4058 /* Event data may be unaligned, so make a local, aligned copy
4059 * before processing. */
4060 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4061 if (iwe->cmd == SIOCGIWSCAN)
4062 return 1;
4063
4064 pos += iwe->len;
4065 }
4066
4067 return 0;
4068 }
4069
4070
4071 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4072 {
4073 struct ifinfomsg *ifi;
4074 int attrlen, _nlmsg_len, rta_len;
4075 struct rtattr *attr;
4076
4077 if (len < (int) sizeof(*ifi))
4078 return 0;
4079
4080 ifi = NLMSG_DATA(h);
4081
4082 if (ifindex != ifi->ifi_index)
4083 return 0; /* event for foreign ifindex */
4084
4085 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4086
4087 attrlen = h->nlmsg_len - _nlmsg_len;
4088 if (attrlen < 0)
4089 return 0;
4090
4091 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4092
4093 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4094 while (RTA_OK(attr, attrlen)) {
4095 if (attr->rta_type == IFLA_WIRELESS &&
4096 i802_is_event_wireless_scan_complete(
4097 ((char *) attr) + rta_len,
4098 attr->rta_len - rta_len))
4099 return 1;
4100 attr = RTA_NEXT(attr, attrlen);
4101 }
4102
4103 return 0;
4104 }
4105
4106
4107 static int i802_is_scan_complete(int s, int ifindex)
4108 {
4109 char buf[1024];
4110 int left;
4111 struct nlmsghdr *h;
4112
4113 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4114 if (left < 0) {
4115 perror("recv(netlink)");
4116 return 0;
4117 }
4118
4119 h = (struct nlmsghdr *) buf;
4120 while (left >= (int) sizeof(*h)) {
4121 int len, plen;
4122
4123 len = h->nlmsg_len;
4124 plen = len - sizeof(*h);
4125 if (len > left || plen < 0) {
4126 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4127 "len=%d left=%d plen=%d",
4128 len, left, plen);
4129 break;
4130 }
4131
4132 switch (h->nlmsg_type) {
4133 case RTM_NEWLINK:
4134 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4135 return 1;
4136 break;
4137 }
4138
4139 len = NLMSG_ALIGN(len);
4140 left -= len;
4141 h = (struct nlmsghdr *) ((char *) h + len);
4142 }
4143
4144 return 0;
4145 }
4146
4147
4148 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4149 {
4150 struct iwreq iwr;
4151 int s, res, ifindex;
4152 struct sockaddr_nl local;
4153 time_t now, end;
4154 fd_set rfds;
4155 struct timeval tv;
4156
4157 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4158 "starting HT 20/40 MHz BSS");
4159
4160 /* Request a new scan */
4161 /* TODO: would be enough to scan the selected band */
4162 os_memset(&iwr, 0, sizeof(iwr));
4163 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4164 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4165 perror("ioctl[SIOCSIWSCAN]");
4166 return -1;
4167 }
4168
4169 ifindex = if_nametoindex(drv->ifname);
4170
4171 /* Wait for scan completion event or timeout */
4172 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4173 if (s < 0) {
4174 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4175 return -1;
4176 }
4177
4178 os_memset(&local, 0, sizeof(local));
4179 local.nl_family = AF_NETLINK;
4180 local.nl_groups = RTMGRP_LINK;
4181 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4182 perror("bind(netlink)");
4183 close(s);
4184 return -1;
4185 }
4186
4187 time(&end);
4188 end += 30; /* Wait at most 30 seconds for scan results */
4189 for (;;) {
4190 time(&now);
4191 tv.tv_sec = end > now ? end - now : 0;
4192 tv.tv_usec = 0;
4193 FD_ZERO(&rfds);
4194 FD_SET(s, &rfds);
4195 res = select(s + 1, &rfds, NULL, NULL, &tv);
4196 if (res < 0) {
4197 perror("select");
4198 /* Assume results are ready after 10 seconds wait */
4199 os_sleep(10, 0);
4200 break;
4201 } else if (res) {
4202 if (i802_is_scan_complete(s, ifindex)) {
4203 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4204 "completed");
4205 break;
4206 }
4207 } else {
4208 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4209 /* Assume results are ready to be read now */
4210 break;
4211 }
4212 }
4213
4214 close(s);
4215
4216 return i802_get_ht_scan_res(drv);
4217 }
4218 #endif /* CONFIG_IEEE80211N */
4219
4220
4221 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4222 {
4223 struct ifreq ifr;
4224 int ret;
4225
4226 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4227 if (drv->ioctl_sock < 0) {
4228 perror("socket[PF_INET,SOCK_DGRAM]");
4229 return -1;
4230 }
4231
4232 /* start listening for EAPOL on the default AP interface */
4233 add_ifidx(drv, if_nametoindex(drv->ifname));
4234
4235 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4236 return -1;
4237
4238 if (bssid) {
4239 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4240 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4241 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4242
4243 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4244 perror("ioctl(SIOCSIFHWADDR)");
4245 return -1;
4246 }
4247 }
4248
4249 /*
4250 * initialise generic netlink and nl80211
4251 */
4252 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4253 if (!drv->nl_cb) {
4254 printf("Failed to allocate netlink callbacks.\n");
4255 return -1;
4256 }
4257
4258 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4259 if (!drv->nl_handle) {
4260 printf("Failed to allocate netlink handle.\n");
4261 return -1;
4262 }
4263
4264 if (genl_connect(drv->nl_handle)) {
4265 printf("Failed to connect to generic netlink.\n");
4266 return -1;
4267 }
4268
4269 #ifdef CONFIG_LIBNL20
4270 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4271 printf("Failed to allocate generic netlink cache.\n");
4272 return -1;
4273 }
4274 #else /* CONFIG_LIBNL20 */
4275 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4276 if (!drv->nl_cache) {
4277 printf("Failed to allocate generic netlink cache.\n");
4278 return -1;
4279 }
4280 #endif /* CONFIG_LIBNL20 */
4281
4282 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4283 if (!drv->nl80211) {
4284 printf("nl80211 not found.\n");
4285 return -1;
4286 }
4287
4288 ret = nl_get_multicast_id(drv, "nl80211", "scan");
4289 if (ret >= 0)
4290 ret = nl_socket_add_membership(drv->nl_handle, ret);
4291 if (ret < 0) {
4292 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4293 "membership for scan events: %d (%s)",
4294 ret, strerror(-ret));
4295 }
4296
4297 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4298 if (ret >= 0)
4299 ret = nl_socket_add_membership(drv->nl_handle, ret);
4300 if (ret < 0) {
4301 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4302 "membership for mlme events: %d (%s)",
4303 ret, strerror(-ret));
4304 }
4305
4306 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4307 wpa_driver_nl80211_event_receive, drv,
4308 drv->hapd);
4309
4310 #ifdef CONFIG_IEEE80211N
4311 if (drv->ht_40mhz_scan) {
4312 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4313 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4314 i802_ht_scan(drv) ||
4315 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4316 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4317 "HT 40 MHz operations");
4318 return -1;
4319 }
4320 }
4321 #endif /* CONFIG_IEEE80211N */
4322
4323 /* Initialise a monitor interface */
4324 if (nl80211_create_monitor_interface(drv))
4325 return -1;
4326
4327 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4328 goto fail1;
4329
4330 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4331 goto fail1;
4332
4333 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4334 if (drv->eapol_sock < 0) {
4335 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4336 goto fail1;
4337 }
4338
4339 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4340 {
4341 printf("Could not register read socket for eapol\n");
4342 return -1;
4343 }
4344
4345 memset(&ifr, 0, sizeof(ifr));
4346 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4347 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4348 perror("ioctl(SIOCGIFHWADDR)");
4349 goto fail1;
4350 }
4351
4352 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4353 printf("Invalid HW-addr family 0x%04x\n",
4354 ifr.ifr_hwaddr.sa_family);
4355 goto fail1;
4356 }
4357 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4358
4359 return 0;
4360
4361 fail1:
4362 nl80211_remove_iface(drv, drv->monitor_ifidx);
4363 return -1;
4364 }
4365
4366
4367 static int i802_get_inact_sec(void *priv, const u8 *addr)
4368 {
4369 struct hostap_sta_driver_data data;
4370 int ret;
4371
4372 data.inactive_msec = (unsigned long) -1;
4373 ret = i802_read_sta_data(priv, &data, addr);
4374 if (ret || data.inactive_msec == (unsigned long) -1)
4375 return -1;
4376 return data.inactive_msec / 1000;
4377 }
4378
4379
4380 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4381 {
4382 #if 0
4383 /* TODO */
4384 #endif
4385 return 0;
4386 }
4387
4388
4389 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4390 {
4391 struct wpa_driver_nl80211_data *drv = priv;
4392 struct ieee80211_mgmt mgmt;
4393
4394 memset(&mgmt, 0, sizeof(mgmt));
4395 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4396 WLAN_FC_STYPE_DEAUTH);
4397 memcpy(mgmt.da, addr, ETH_ALEN);
4398 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4399 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4400 mgmt.u.deauth.reason_code = host_to_le16(reason);
4401 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4402 IEEE80211_HDRLEN +
4403 sizeof(mgmt.u.deauth));
4404 }
4405
4406
4407 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4408 {
4409 struct wpa_driver_nl80211_data *drv = priv;
4410 struct ieee80211_mgmt mgmt;
4411
4412 memset(&mgmt, 0, sizeof(mgmt));
4413 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4414 WLAN_FC_STYPE_DISASSOC);
4415 memcpy(mgmt.da, addr, ETH_ALEN);
4416 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4417 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4418 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4419 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4420 IEEE80211_HDRLEN +
4421 sizeof(mgmt.u.disassoc));
4422 }
4423
4424
4425 static const struct hostapd_neighbor_bss *
4426 i802_get_neighbor_bss(void *priv, size_t *num)
4427 {
4428 struct wpa_driver_nl80211_data *drv = priv;
4429 *num = drv->num_neighbors;
4430 return drv->neighbors;
4431 }
4432
4433
4434 static void *i802_init(struct hostapd_data *hapd,
4435 struct wpa_init_params *params)
4436 {
4437 struct wpa_driver_nl80211_data *drv;
4438 size_t i;
4439
4440 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4441 if (drv == NULL) {
4442 printf("Could not allocate memory for i802 driver data\n");
4443 return NULL;
4444 }
4445
4446 drv->hapd = hapd;
4447 memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4448 drv->ifindex = if_nametoindex(drv->ifname);
4449 drv->bss.ifindex = drv->ifindex;
4450
4451 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4452 drv->if_indices = drv->default_if_indices;
4453 for (i = 0; i < params->num_bridge; i++) {
4454 if (params->bridge[i])
4455 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4456 }
4457 drv->ht_40mhz_scan = params->ht_40mhz_scan;
4458
4459 if (i802_init_sockets(drv, params->bssid))
4460 goto failed;
4461
4462 return drv;
4463
4464 failed:
4465 free(drv);
4466 return NULL;
4467 }
4468
4469
4470 static void i802_deinit(void *priv)
4471 {
4472 struct wpa_driver_nl80211_data *drv = priv;
4473 struct i802_bss *bss, *prev;
4474
4475 if (drv->last_freq_ht) {
4476 /* Clear HT flags from the driver */
4477 struct hostapd_freq_params freq;
4478 os_memset(&freq, 0, sizeof(freq));
4479 freq.freq = drv->last_freq;
4480 i802_set_freq(priv, &freq);
4481 }
4482
4483 i802_del_beacon(drv);
4484
4485 /* remove monitor interface */
4486 nl80211_remove_iface(drv, drv->monitor_ifidx);
4487
4488 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4489
4490 if (drv->monitor_sock >= 0) {
4491 eloop_unregister_read_sock(drv->monitor_sock);
4492 close(drv->monitor_sock);
4493 }
4494 if (drv->ioctl_sock >= 0)
4495 close(drv->ioctl_sock);
4496 if (drv->eapol_sock >= 0) {
4497 eloop_unregister_read_sock(drv->eapol_sock);
4498 close(drv->eapol_sock);
4499 }
4500
4501 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4502 genl_family_put(drv->nl80211);
4503 nl_cache_free(drv->nl_cache);
4504 nl_handle_destroy(drv->nl_handle);
4505 nl_cb_put(drv->nl_cb);
4506
4507 if (drv->if_indices != drv->default_if_indices)
4508 free(drv->if_indices);
4509
4510 os_free(drv->neighbors);
4511
4512 bss = drv->bss.next;
4513 while (bss) {
4514 prev = bss;
4515 bss = bss->next;
4516 os_free(bss);
4517 }
4518
4519 free(drv);
4520 }
4521
4522 #endif /* HOSTAPD */
4523
4524
4525 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4526 .name = "nl80211",
4527 .desc = "Linux nl80211/cfg80211",
4528 .get_bssid = wpa_driver_nl80211_get_bssid,
4529 .get_ssid = wpa_driver_nl80211_get_ssid,
4530 .set_key = wpa_driver_nl80211_set_key,
4531 .scan2 = wpa_driver_nl80211_scan,
4532 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4533 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4534 .disassociate = wpa_driver_nl80211_disassociate,
4535 .authenticate = wpa_driver_nl80211_authenticate,
4536 .associate = wpa_driver_nl80211_associate,
4537 .init = wpa_driver_nl80211_init,
4538 .deinit = wpa_driver_nl80211_deinit,
4539 .get_capa = wpa_driver_nl80211_get_capa,
4540 .set_operstate = wpa_driver_nl80211_set_operstate,
4541 .set_country = wpa_driver_nl80211_set_country,
4542 #ifdef CONFIG_AP
4543 .set_beacon = wpa_driver_nl80211_set_beacon,
4544 .send_mlme = wpa_driver_nl80211_send_mlme,
4545 #endif /* CONFIG_AP */
4546 #if defined(CONFIG_AP) || defined(HOSTAPD)
4547 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4548 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4549 #endif /* CONFIG_AP || HOSTAPD */
4550 #ifdef HOSTAPD
4551 .hapd_init = i802_init,
4552 .hapd_deinit = i802_deinit,
4553 .hapd_set_key = i802_set_key,
4554 .get_seqnum = i802_get_seqnum,
4555 .flush = i802_flush,
4556 .read_sta_data = i802_read_sta_data,
4557 .hapd_send_eapol = i802_send_eapol,
4558 .sta_set_flags = i802_sta_set_flags,
4559 .sta_deauth = i802_sta_deauth,
4560 .sta_disassoc = i802_sta_disassoc,
4561 .sta_remove = i802_sta_remove,
4562 .sta_add = i802_sta_add,
4563 .get_inact_sec = i802_get_inact_sec,
4564 .sta_clear_stats = i802_sta_clear_stats,
4565 .set_freq = i802_set_freq,
4566 .set_rts = i802_set_rts,
4567 .set_frag = i802_set_frag,
4568 .set_retry = i802_set_retry,
4569 .set_rate_sets = i802_set_rate_sets,
4570 .hapd_set_beacon = i802_set_beacon,
4571 .set_cts_protect = i802_set_cts_protect,
4572 .set_preamble = i802_set_preamble,
4573 .set_short_slot_time = i802_set_short_slot_time,
4574 .set_tx_queue_params = i802_set_tx_queue_params,
4575 .bss_add = i802_bss_add,
4576 .bss_remove = i802_bss_remove,
4577 .if_add = i802_if_add,
4578 .if_update = i802_if_update,
4579 .if_remove = i802_if_remove,
4580 .set_sta_vlan = i802_set_sta_vlan,
4581 .get_neighbor_bss = i802_get_neighbor_bss,
4582 #endif /* HOSTAPD */
4583 };
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