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nl80211: Use shared code for netlink initialization
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * Driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright (c) 2009, Atheros Communications
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Alternatively, this software may be distributed under the terms of BSD
14 * license.
15 *
16 * See README and COPYING for more details.
17 */
18
19 #include "includes.h"
20 #include <sys/ioctl.h>
21 #include <net/if_arp.h>
22 #include <netlink/genl/genl.h>
23 #include <netlink/genl/family.h>
24 #include <netlink/genl/ctrl.h>
25 #include "nl80211_copy.h"
26 #include "wireless_copy.h"
27
28 #include "common.h"
29 #include "driver.h"
30 #include "eloop.h"
31 #include "ieee802_11_defs.h"
32
33 #if defined(CONFIG_AP) || defined(HOSTAPD)
34 #include <netpacket/packet.h>
35 #include <linux/filter.h>
36 #include "radiotap.h"
37 #include "radiotap_iter.h"
38 #endif /* CONFIG_AP || HOSTAPD */
39
40 #ifdef CONFIG_AP
41
42 #include "../hostapd/hostapd_defs.h"
43
44 #ifndef ETH_P_ALL
45 #define ETH_P_ALL 0x0003
46 #endif
47
48 #endif /* CONFIG_AP */
49
50 #ifdef HOSTAPD
51 #include "../../hostapd/hostapd.h"
52 #include "../../hostapd/sta_flags.h"
53 #include "ieee802_11_common.h"
54
55 #ifdef CONFIG_LIBNL20
56 /* libnl 2.0 compatibility code */
57 #define nl_handle_alloc_cb nl_socket_alloc_cb
58 #define nl_handle_destroy nl_socket_free
59 #endif /* CONFIG_LIBNL20 */
60
61 #endif /* HOSTAPD */
62
63
64 #ifndef IFF_LOWER_UP
65 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
66 #endif
67 #ifndef IFF_DORMANT
68 #define IFF_DORMANT 0x20000 /* driver signals dormant */
69 #endif
70
71 #ifndef IF_OPER_DORMANT
72 #define IF_OPER_DORMANT 5
73 #endif
74 #ifndef IF_OPER_UP
75 #define IF_OPER_UP 6
76 #endif
77
78 enum ieee80211_msg_type {
79 ieee80211_msg_normal = 0,
80 ieee80211_msg_tx_callback_ack = 1,
81 ieee80211_msg_tx_callback_fail = 2,
82 };
83
84 struct i802_bss {
85 struct i802_bss *next;
86 int ifindex;
87 unsigned int beacon_set:1;
88 };
89
90 struct wpa_driver_nl80211_data {
91 void *ctx;
92 int link_event_sock;
93 int ioctl_sock; /* socket for ioctl() use */
94 char ifname[IFNAMSIZ + 1];
95 int ifindex;
96 int if_removed;
97 struct wpa_driver_capa capa;
98 int has_capability;
99
100 int operstate;
101
102 int scan_complete_events;
103
104 struct nl_handle *nl_handle;
105 struct nl_cache *nl_cache;
106 struct nl_cb *nl_cb;
107 struct genl_family *nl80211;
108
109 u8 bssid[ETH_ALEN];
110 int associated;
111 u8 ssid[32];
112 size_t ssid_len;
113
114 #if defined(CONFIG_AP) || defined(HOSTAPD)
115 int beacon_int;
116 int monitor_sock;
117 int monitor_ifidx;
118 #endif /* CONFIG_AP || HOSTAPD */
119
120 #ifdef CONFIG_AP
121 unsigned int beacon_set:1;
122 #endif /* CONFIG_AP */
123
124 #ifdef HOSTAPD
125 struct hostapd_data *hapd;
126
127 int eapol_sock; /* socket for EAPOL frames */
128
129 int default_if_indices[16];
130 int *if_indices;
131 int num_if_indices;
132
133 struct i802_bss bss;
134 unsigned int ht_40mhz_scan:1;
135
136 int last_freq;
137 int last_freq_ht;
138 struct hostapd_neighbor_bss *neighbors;
139 size_t num_neighbors;
140 #endif /* HOSTAPD */
141 };
142
143
144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
145 void *timeout_ctx);
146 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
147 int mode);
148 static int
149 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
150
151 #ifdef CONFIG_AP
152 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
153 int ifidx);
154 #endif /* CONFIG_AP */
155
156 #ifdef HOSTAPD
157 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
158 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
159 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
160 int ifindex);
161 #endif /* HOSTAPD */
162
163
164 /* nl80211 code */
165 static int ack_handler(struct nl_msg *msg, void *arg)
166 {
167 int *err = arg;
168 *err = 0;
169 return NL_STOP;
170 }
171
172 static int finish_handler(struct nl_msg *msg, void *arg)
173 {
174 int *ret = arg;
175 *ret = 0;
176 return NL_SKIP;
177 }
178
179 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
180 void *arg)
181 {
182 int *ret = arg;
183 *ret = err->error;
184 return NL_SKIP;
185 }
186
187
188 static int no_seq_check(struct nl_msg *msg, void *arg)
189 {
190 return NL_OK;
191 }
192
193
194 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
195 struct nl_msg *msg,
196 int (*valid_handler)(struct nl_msg *, void *),
197 void *valid_data)
198 {
199 struct nl_cb *cb;
200 int err = -ENOMEM;
201
202 cb = nl_cb_clone(drv->nl_cb);
203 if (!cb)
204 goto out;
205
206 err = nl_send_auto_complete(drv->nl_handle, msg);
207 if (err < 0)
208 goto out;
209
210 err = 1;
211
212 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
213 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
214 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
215
216 if (valid_handler)
217 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
218 valid_handler, valid_data);
219
220 while (err > 0)
221 nl_recvmsgs(drv->nl_handle, cb);
222 out:
223 nl_cb_put(cb);
224 nlmsg_free(msg);
225 return err;
226 }
227
228
229 struct family_data {
230 const char *group;
231 int id;
232 };
233
234
235 static int family_handler(struct nl_msg *msg, void *arg)
236 {
237 struct family_data *res = arg;
238 struct nlattr *tb[CTRL_ATTR_MAX + 1];
239 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
240 struct nlattr *mcgrp;
241 int i;
242
243 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
244 genlmsg_attrlen(gnlh, 0), NULL);
245 if (!tb[CTRL_ATTR_MCAST_GROUPS])
246 return NL_SKIP;
247
248 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
249 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
250 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
251 nla_len(mcgrp), NULL);
252 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
253 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
254 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
255 res->group,
256 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
257 continue;
258 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
259 break;
260 };
261
262 return NL_SKIP;
263 }
264
265
266 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
267 const char *family, const char *group)
268 {
269 struct nl_msg *msg;
270 int ret = -1;
271 struct family_data res = { group, -ENOENT };
272
273 msg = nlmsg_alloc();
274 if (!msg)
275 return -ENOMEM;
276 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
277 0, 0, CTRL_CMD_GETFAMILY, 0);
278 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
279
280 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
281 msg = NULL;
282 if (ret == 0)
283 ret = res.id;
284
285 nla_put_failure:
286 nlmsg_free(msg);
287 return ret;
288 }
289
290
291 static int wpa_driver_nl80211_send_oper_ifla(
292 struct wpa_driver_nl80211_data *drv,
293 int linkmode, int operstate)
294 {
295 struct {
296 struct nlmsghdr hdr;
297 struct ifinfomsg ifinfo;
298 char opts[16];
299 } req;
300 struct rtattr *rta;
301 static int nl_seq;
302 ssize_t ret;
303
304 os_memset(&req, 0, sizeof(req));
305
306 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
307 req.hdr.nlmsg_type = RTM_SETLINK;
308 req.hdr.nlmsg_flags = NLM_F_REQUEST;
309 req.hdr.nlmsg_seq = ++nl_seq;
310 req.hdr.nlmsg_pid = 0;
311
312 req.ifinfo.ifi_family = AF_UNSPEC;
313 req.ifinfo.ifi_type = 0;
314 req.ifinfo.ifi_index = drv->ifindex;
315 req.ifinfo.ifi_flags = 0;
316 req.ifinfo.ifi_change = 0;
317
318 if (linkmode != -1) {
319 rta = (struct rtattr *)
320 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
321 rta->rta_type = IFLA_LINKMODE;
322 rta->rta_len = RTA_LENGTH(sizeof(char));
323 *((char *) RTA_DATA(rta)) = linkmode;
324 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
325 RTA_LENGTH(sizeof(char));
326 }
327 if (operstate != -1) {
328 rta = (struct rtattr *)
329 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
330 rta->rta_type = IFLA_OPERSTATE;
331 rta->rta_len = RTA_LENGTH(sizeof(char));
332 *((char *) RTA_DATA(rta)) = operstate;
333 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
334 RTA_LENGTH(sizeof(char));
335 }
336
337 wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
338 linkmode, operstate);
339
340 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
341 if (ret < 0) {
342 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
343 " %s (assume operstate is not supported)",
344 strerror(errno));
345 }
346
347 return ret < 0 ? -1 : 0;
348 }
349
350
351 static int wpa_driver_nl80211_set_auth_param(
352 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
353 {
354 struct iwreq iwr;
355 int ret = 0;
356
357 os_memset(&iwr, 0, sizeof(iwr));
358 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
359 iwr.u.param.flags = idx & IW_AUTH_INDEX;
360 iwr.u.param.value = value;
361
362 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
363 if (errno != EOPNOTSUPP) {
364 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
365 "value 0x%x) failed: %s)",
366 idx, value, strerror(errno));
367 }
368 ret = errno == EOPNOTSUPP ? -2 : -1;
369 }
370
371 return ret;
372 }
373
374
375 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
376 {
377 struct wpa_driver_nl80211_data *drv = priv;
378 if (!drv->associated)
379 return -1;
380 os_memcpy(bssid, drv->bssid, ETH_ALEN);
381 return 0;
382 }
383
384
385 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
386 {
387 struct wpa_driver_nl80211_data *drv = priv;
388 if (!drv->associated)
389 return -1;
390 os_memcpy(ssid, drv->ssid, drv->ssid_len);
391 return drv->ssid_len;
392 }
393
394
395 #ifndef HOSTAPD
396 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
397 void *ctx, char *buf, size_t len,
398 int del)
399 {
400 union wpa_event_data event;
401
402 os_memset(&event, 0, sizeof(event));
403 if (len > sizeof(event.interface_status.ifname))
404 len = sizeof(event.interface_status.ifname) - 1;
405 os_memcpy(event.interface_status.ifname, buf, len);
406 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
407 EVENT_INTERFACE_ADDED;
408
409 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
410 del ? "DEL" : "NEW",
411 event.interface_status.ifname,
412 del ? "removed" : "added");
413
414 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
415 if (del)
416 drv->if_removed = 1;
417 else
418 drv->if_removed = 0;
419 }
420
421 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
422 }
423
424
425 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
426 struct nlmsghdr *h)
427 {
428 struct ifinfomsg *ifi;
429 int attrlen, _nlmsg_len, rta_len;
430 struct rtattr *attr;
431
432 ifi = NLMSG_DATA(h);
433
434 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
435
436 attrlen = h->nlmsg_len - _nlmsg_len;
437 if (attrlen < 0)
438 return 0;
439
440 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
441
442 rta_len = RTA_ALIGN(sizeof(struct rtattr));
443 while (RTA_OK(attr, attrlen)) {
444 if (attr->rta_type == IFLA_IFNAME) {
445 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
446 == 0)
447 return 1;
448 else
449 break;
450 }
451 attr = RTA_NEXT(attr, attrlen);
452 }
453
454 return 0;
455 }
456
457
458 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
459 int ifindex, struct nlmsghdr *h)
460 {
461 if (drv->ifindex == ifindex)
462 return 1;
463
464 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
465 drv->ifindex = if_nametoindex(drv->ifname);
466 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
467 "interface");
468 wpa_driver_nl80211_finish_drv_init(drv);
469 return 1;
470 }
471
472 return 0;
473 }
474
475
476 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
477 void *ctx, struct nlmsghdr *h,
478 size_t len)
479 {
480 struct ifinfomsg *ifi;
481 int attrlen, _nlmsg_len, rta_len;
482 struct rtattr * attr;
483
484 if (len < sizeof(*ifi))
485 return;
486
487 ifi = NLMSG_DATA(h);
488
489 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
490 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
491 ifi->ifi_index);
492 return;
493 }
494
495 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
496 "(%s%s%s%s)",
497 drv->operstate, ifi->ifi_flags,
498 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
499 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
500 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
501 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
502 /*
503 * Some drivers send the association event before the operup event--in
504 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
505 * fails. This will hit us when wpa_supplicant does not need to do
506 * IEEE 802.1X authentication
507 */
508 if (drv->operstate == 1 &&
509 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
510 !(ifi->ifi_flags & IFF_RUNNING))
511 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
512
513 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
514
515 attrlen = h->nlmsg_len - _nlmsg_len;
516 if (attrlen < 0)
517 return;
518
519 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
520
521 rta_len = RTA_ALIGN(sizeof(struct rtattr));
522 while (RTA_OK(attr, attrlen)) {
523 if (attr->rta_type == IFLA_IFNAME) {
524 wpa_driver_nl80211_event_link(
525 drv, ctx,
526 ((char *) attr) + rta_len,
527 attr->rta_len - rta_len, 0);
528 }
529 attr = RTA_NEXT(attr, attrlen);
530 }
531 }
532
533
534 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
535 void *ctx, struct nlmsghdr *h,
536 size_t len)
537 {
538 struct ifinfomsg *ifi;
539 int attrlen, _nlmsg_len, rta_len;
540 struct rtattr * attr;
541
542 if (len < sizeof(*ifi))
543 return;
544
545 ifi = NLMSG_DATA(h);
546
547 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
548
549 attrlen = h->nlmsg_len - _nlmsg_len;
550 if (attrlen < 0)
551 return;
552
553 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
554
555 rta_len = RTA_ALIGN(sizeof(struct rtattr));
556 while (RTA_OK(attr, attrlen)) {
557 if (attr->rta_type == IFLA_IFNAME) {
558 wpa_driver_nl80211_event_link(
559 drv, ctx,
560 ((char *) attr) + rta_len,
561 attr->rta_len - rta_len, 1);
562 }
563 attr = RTA_NEXT(attr, attrlen);
564 }
565 }
566
567
568 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
569 void *sock_ctx)
570 {
571 char buf[8192];
572 int left;
573 struct sockaddr_nl from;
574 socklen_t fromlen;
575 struct nlmsghdr *h;
576 int max_events = 10;
577
578 try_again:
579 fromlen = sizeof(from);
580 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
581 (struct sockaddr *) &from, &fromlen);
582 if (left < 0) {
583 if (errno != EINTR && errno != EAGAIN)
584 perror("recvfrom(netlink)");
585 return;
586 }
587
588 h = (struct nlmsghdr *) buf;
589 while (left >= (int) sizeof(*h)) {
590 int len, plen;
591
592 len = h->nlmsg_len;
593 plen = len - sizeof(*h);
594 if (len > left || plen < 0) {
595 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
596 "len=%d left=%d plen=%d",
597 len, left, plen);
598 break;
599 }
600
601 switch (h->nlmsg_type) {
602 case RTM_NEWLINK:
603 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
604 h, plen);
605 break;
606 case RTM_DELLINK:
607 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
608 h, plen);
609 break;
610 }
611
612 len = NLMSG_ALIGN(len);
613 left -= len;
614 h = (struct nlmsghdr *) ((char *) h + len);
615 }
616
617 if (left > 0) {
618 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
619 "message", left);
620 }
621
622 if (--max_events > 0) {
623 /*
624 * Try to receive all events in one eloop call in order to
625 * limit race condition on cases where AssocInfo event, Assoc
626 * event, and EAPOL frames are received more or less at the
627 * same time. We want to process the event messages first
628 * before starting EAPOL processing.
629 */
630 goto try_again;
631 }
632 }
633
634
635 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
636 const u8 *frame, size_t len)
637 {
638 const struct ieee80211_mgmt *mgmt;
639 union wpa_event_data event;
640
641 mgmt = (const struct ieee80211_mgmt *) frame;
642 if (len < 24 + sizeof(mgmt->u.auth)) {
643 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
644 "frame");
645 return;
646 }
647
648 os_memset(&event, 0, sizeof(event));
649 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
650 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
651 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
652 if (len > 24 + sizeof(mgmt->u.auth)) {
653 event.auth.ies = mgmt->u.auth.variable;
654 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
655 }
656
657 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
658 }
659
660
661 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
662 const u8 *frame, size_t len)
663 {
664 const struct ieee80211_mgmt *mgmt;
665 union wpa_event_data event;
666 u16 status;
667
668 mgmt = (const struct ieee80211_mgmt *) frame;
669 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
670 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
671 "frame");
672 return;
673 }
674
675 status = le_to_host16(mgmt->u.assoc_resp.status_code);
676 if (status != WLAN_STATUS_SUCCESS) {
677 os_memset(&event, 0, sizeof(event));
678 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
679 event.assoc_reject.resp_ies =
680 (u8 *) mgmt->u.assoc_resp.variable;
681 event.assoc_reject.resp_ies_len =
682 len - 24 - sizeof(mgmt->u.assoc_resp);
683 }
684 event.assoc_reject.status_code = status;
685
686 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
687 return;
688 }
689
690 drv->associated = 1;
691 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
692
693 os_memset(&event, 0, sizeof(event));
694 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
695 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
696 event.assoc_info.resp_ies_len =
697 len - 24 - sizeof(mgmt->u.assoc_resp);
698 }
699
700 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
701 }
702
703
704 static void mlme_event(struct wpa_driver_nl80211_data *drv,
705 enum nl80211_commands cmd, struct nlattr *frame)
706 {
707 if (frame == NULL) {
708 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
709 "data", cmd);
710 return;
711 }
712
713 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
714 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
715 nla_data(frame), nla_len(frame));
716
717 switch (cmd) {
718 case NL80211_CMD_AUTHENTICATE:
719 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
720 break;
721 case NL80211_CMD_ASSOCIATE:
722 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
723 break;
724 case NL80211_CMD_DEAUTHENTICATE:
725 drv->associated = 0;
726 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
727 break;
728 case NL80211_CMD_DISASSOCIATE:
729 drv->associated = 0;
730 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
731 break;
732 default:
733 break;
734 }
735 }
736
737 #endif /* HOSTAPD */
738
739
740 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
741 struct nlattr *tb[])
742 {
743 #ifdef HOSTAPD
744 if (tb[NL80211_ATTR_MAC])
745 hostapd_michael_mic_failure(drv->hapd,
746 nla_data(tb[NL80211_ATTR_MAC]));
747 #else /* HOSTAPD */
748 union wpa_event_data data;
749
750 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
751 os_memset(&data, 0, sizeof(data));
752 if (tb[NL80211_ATTR_MAC]) {
753 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
754 nla_data(tb[NL80211_ATTR_MAC]),
755 nla_len(tb[NL80211_ATTR_MAC]));
756 }
757 if (tb[NL80211_ATTR_KEY_SEQ]) {
758 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
759 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
760 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
761 }
762 if (tb[NL80211_ATTR_KEY_TYPE]) {
763 enum nl80211_key_type key_type =
764 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
765 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
766 if (key_type == NL80211_KEYTYPE_PAIRWISE)
767 data.michael_mic_failure.unicast = 1;
768 } else
769 data.michael_mic_failure.unicast = 1;
770
771 if (tb[NL80211_ATTR_KEY_IDX]) {
772 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
773 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
774 }
775
776 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
777 #endif /* HOSTAPD */
778 }
779
780
781 static int process_event(struct nl_msg *msg, void *arg)
782 {
783 struct wpa_driver_nl80211_data *drv = arg;
784 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
785 struct nlattr *tb[NL80211_ATTR_MAX + 1];
786
787 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
788 genlmsg_attrlen(gnlh, 0), NULL);
789
790 if (tb[NL80211_ATTR_IFINDEX]) {
791 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
792 if (ifindex != drv->ifindex) {
793 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
794 " for foreign interface (ifindex %d)",
795 gnlh->cmd, ifindex);
796 return NL_SKIP;
797 }
798 }
799
800 switch (gnlh->cmd) {
801 #ifndef HOSTAPD
802 case NL80211_CMD_NEW_SCAN_RESULTS:
803 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
804 drv->scan_complete_events = 1;
805 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
806 drv->ctx);
807 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
808 break;
809 case NL80211_CMD_SCAN_ABORTED:
810 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
811 /*
812 * Need to indicate that scan results are available in order
813 * not to make wpa_supplicant stop its scanning.
814 */
815 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
816 drv->ctx);
817 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
818 break;
819 case NL80211_CMD_AUTHENTICATE:
820 case NL80211_CMD_ASSOCIATE:
821 case NL80211_CMD_DEAUTHENTICATE:
822 case NL80211_CMD_DISASSOCIATE:
823 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
824 break;
825 #endif /* HOSTAPD */
826 case NL80211_CMD_MICHAEL_MIC_FAILURE:
827 mlme_event_michael_mic_failure(drv, tb);
828 break;
829 default:
830 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
831 "(cmd=%d)", gnlh->cmd);
832 break;
833 }
834
835 return NL_SKIP;
836 }
837
838
839 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
840 void *sock_ctx)
841 {
842 struct nl_cb *cb;
843 struct wpa_driver_nl80211_data *drv = eloop_ctx;
844
845 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
846
847 cb = nl_cb_clone(drv->nl_cb);
848 if (!cb)
849 return;
850 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
851 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
852 nl_recvmsgs(drv->nl_handle, cb);
853 nl_cb_put(cb);
854 }
855
856
857 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
858 const char *ifname, int dev_up)
859 {
860 struct ifreq ifr;
861
862 if (drv->ioctl_sock < 0)
863 return -1;
864
865 os_memset(&ifr, 0, sizeof(ifr));
866 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
867
868 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
869 perror("ioctl[SIOCGIFFLAGS]");
870 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
871 ifname);
872 return -1;
873 }
874
875 if (dev_up) {
876 if (ifr.ifr_flags & IFF_UP)
877 return 0;
878 ifr.ifr_flags |= IFF_UP;
879 } else {
880 if (!(ifr.ifr_flags & IFF_UP))
881 return 0;
882 ifr.ifr_flags &= ~IFF_UP;
883 }
884
885 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
886 perror("ioctl[SIOCSIFFLAGS]");
887 return -1;
888 }
889
890 return 0;
891 }
892
893
894 /**
895 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
896 * @priv: driver_nl80211 private data
897 * @alpha2_arg: country to which to switch to
898 * Returns: 0 on success, -1 on failure
899 *
900 * This asks nl80211 to set the regulatory domain for given
901 * country ISO / IEC alpha2.
902 */
903 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
904 {
905 struct wpa_driver_nl80211_data *drv = priv;
906 char alpha2[3];
907 struct nl_msg *msg;
908
909 msg = nlmsg_alloc();
910 if (!msg)
911 return -ENOMEM;
912
913 alpha2[0] = alpha2_arg[0];
914 alpha2[1] = alpha2_arg[1];
915 alpha2[2] = '\0';
916
917 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
918 0, NL80211_CMD_REQ_SET_REG, 0);
919
920 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
921 if (send_and_recv_msgs(drv, msg, NULL, NULL))
922 return -EINVAL;
923 return 0;
924 nla_put_failure:
925 return -EINVAL;
926 }
927
928
929 struct wiphy_info_data {
930 int max_scan_ssids;
931 int ap_supported;
932 };
933
934
935 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
936 {
937 struct nlattr *tb[NL80211_ATTR_MAX + 1];
938 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
939 struct wiphy_info_data *info = arg;
940
941 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
942 genlmsg_attrlen(gnlh, 0), NULL);
943
944 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
945 info->max_scan_ssids =
946 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
947
948 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
949 struct nlattr *nl_mode;
950 int i;
951 nla_for_each_nested(nl_mode,
952 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
953 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
954 info->ap_supported = 1;
955 break;
956 }
957 }
958 }
959
960 return NL_SKIP;
961 }
962
963
964 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
965 struct wiphy_info_data *info)
966 {
967 struct nl_msg *msg;
968
969 os_memset(info, 0, sizeof(*info));
970 msg = nlmsg_alloc();
971 if (!msg)
972 return -1;
973
974 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
975 0, NL80211_CMD_GET_WIPHY, 0);
976
977 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
978
979 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
980 return 0;
981 msg = NULL;
982 nla_put_failure:
983 nlmsg_free(msg);
984 return -1;
985 }
986
987
988 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
989 {
990 struct wiphy_info_data info;
991 if (wpa_driver_nl80211_get_info(drv, &info))
992 return;
993 drv->has_capability = 1;
994 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
995 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
996 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
997 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
998 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
999 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1000 WPA_DRIVER_CAPA_ENC_WEP104 |
1001 WPA_DRIVER_CAPA_ENC_TKIP |
1002 WPA_DRIVER_CAPA_ENC_CCMP;
1003
1004 drv->capa.max_scan_ssids = info.max_scan_ssids;
1005 if (info.ap_supported)
1006 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1007 }
1008
1009
1010 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1011 void *ctx)
1012 {
1013 int ret;
1014
1015 /* Initialize generic netlink and nl80211 */
1016
1017 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1018 if (drv->nl_cb == NULL) {
1019 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1020 "callbacks");
1021 goto err1;
1022 }
1023
1024 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1025 if (drv->nl_handle == NULL) {
1026 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1027 "callbacks");
1028 goto err2;
1029 }
1030
1031 if (genl_connect(drv->nl_handle)) {
1032 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1033 "netlink");
1034 goto err3;
1035 }
1036
1037 #ifdef CONFIG_LIBNL20
1038 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1039 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1040 "netlink cache");
1041 goto err3;
1042 }
1043 #else /* CONFIG_LIBNL20 */
1044 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1045 if (drv->nl_cache == NULL) {
1046 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1047 "netlink cache");
1048 goto err3;
1049 }
1050 #endif /* CONFIG_LIBNL20 */
1051
1052
1053 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1054 if (drv->nl80211 == NULL) {
1055 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1056 "found");
1057 goto err4;
1058 }
1059
1060 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1061 if (ret >= 0)
1062 ret = nl_socket_add_membership(drv->nl_handle, ret);
1063 if (ret < 0) {
1064 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1065 "membership for scan events: %d (%s)",
1066 ret, strerror(-ret));
1067 goto err4;
1068 }
1069
1070 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1071 if (ret >= 0)
1072 ret = nl_socket_add_membership(drv->nl_handle, ret);
1073 if (ret < 0) {
1074 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1075 "membership for mlme events: %d (%s)",
1076 ret, strerror(-ret));
1077 goto err4;
1078 }
1079
1080 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1081 wpa_driver_nl80211_event_receive, drv, ctx);
1082
1083 return 0;
1084
1085 err4:
1086 nl_cache_free(drv->nl_cache);
1087 err3:
1088 nl_handle_destroy(drv->nl_handle);
1089 err2:
1090 nl_cb_put(drv->nl_cb);
1091 err1:
1092 return -1;
1093 }
1094
1095
1096 /**
1097 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1098 * @ctx: context to be used when calling wpa_supplicant functions,
1099 * e.g., wpa_supplicant_event()
1100 * @ifname: interface name, e.g., wlan0
1101 * Returns: Pointer to private data, %NULL on failure
1102 */
1103 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1104 {
1105 int s;
1106 struct sockaddr_nl local;
1107 struct wpa_driver_nl80211_data *drv;
1108
1109 drv = os_zalloc(sizeof(*drv));
1110 if (drv == NULL)
1111 return NULL;
1112 drv->ctx = ctx;
1113 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1114 #ifdef CONFIG_AP
1115 drv->monitor_ifidx = -1;
1116 drv->monitor_sock = -1;
1117 #endif /* CONFIG_AP */
1118
1119 if (wpa_driver_nl80211_init_nl(drv, ctx))
1120 goto err1;
1121
1122 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1123
1124 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1125 if (drv->ioctl_sock < 0) {
1126 perror("socket(PF_INET,SOCK_DGRAM)");
1127 goto err5;
1128 }
1129
1130 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1131 if (s < 0) {
1132 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1133 goto err6;
1134 }
1135
1136 os_memset(&local, 0, sizeof(local));
1137 local.nl_family = AF_NETLINK;
1138 local.nl_groups = RTMGRP_LINK;
1139 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1140 perror("bind(netlink)");
1141 close(s);
1142 goto err6;
1143 }
1144
1145 #ifndef HOSTAPD
1146 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1147 ctx);
1148 #endif /* HOSTAPD */
1149 drv->link_event_sock = s;
1150
1151 if (wpa_driver_nl80211_finish_drv_init(drv))
1152 goto err7;
1153
1154 return drv;
1155
1156 err7:
1157 eloop_unregister_read_sock(drv->link_event_sock);
1158 close(drv->link_event_sock);
1159 err6:
1160 close(drv->ioctl_sock);
1161 err5:
1162 genl_family_put(drv->nl80211);
1163 nl_cache_free(drv->nl_cache);
1164 nl_handle_destroy(drv->nl_handle);
1165 nl_cb_put(drv->nl_cb);
1166 err1:
1167 os_free(drv);
1168 return NULL;
1169 }
1170
1171
1172 static int
1173 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1174 {
1175 drv->ifindex = if_nametoindex(drv->ifname);
1176
1177 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1178 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1179 "use managed mode");
1180 }
1181
1182 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1183 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1184 "UP", drv->ifname);
1185 return -1;
1186 }
1187
1188 wpa_driver_nl80211_capa(drv);
1189
1190 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1191
1192 return 0;
1193 }
1194
1195
1196 /**
1197 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1198 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1199 *
1200 * Shut down driver interface and processing of driver events. Free
1201 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1202 */
1203 static void wpa_driver_nl80211_deinit(void *priv)
1204 {
1205 struct wpa_driver_nl80211_data *drv = priv;
1206
1207 #ifdef CONFIG_AP
1208 if (drv->monitor_ifidx >= 0)
1209 nl80211_remove_iface(drv, drv->monitor_ifidx);
1210 if (drv->monitor_sock >= 0) {
1211 eloop_unregister_read_sock(drv->monitor_sock);
1212 close(drv->monitor_sock);
1213 }
1214 #endif /* CONFIG_AP */
1215
1216 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1217
1218 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1219
1220 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1221
1222 eloop_unregister_read_sock(drv->link_event_sock);
1223
1224 hostapd_set_iface_flags(drv, drv->ifname, 0);
1225 wpa_driver_nl80211_set_mode(drv, 0);
1226
1227 close(drv->link_event_sock);
1228 close(drv->ioctl_sock);
1229
1230 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1231 genl_family_put(drv->nl80211);
1232 nl_cache_free(drv->nl_cache);
1233 nl_handle_destroy(drv->nl_handle);
1234 nl_cb_put(drv->nl_cb);
1235
1236 os_free(drv);
1237 }
1238
1239
1240 /**
1241 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1242 * @eloop_ctx: Unused
1243 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1244 *
1245 * This function can be used as registered timeout when starting a scan to
1246 * generate a scan completed event if the driver does not report this.
1247 */
1248 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1249 {
1250 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1251 #ifndef HOSTAPD
1252 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1253 #endif /* HOSTAPD */
1254 }
1255
1256
1257 /**
1258 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1259 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1260 * @params: Scan parameters
1261 * Returns: 0 on success, -1 on failure
1262 */
1263 static int wpa_driver_nl80211_scan(void *priv,
1264 struct wpa_driver_scan_params *params)
1265 {
1266 struct wpa_driver_nl80211_data *drv = priv;
1267 int ret = 0, timeout;
1268 struct nl_msg *msg, *ssids, *freqs;
1269 size_t i;
1270
1271 msg = nlmsg_alloc();
1272 ssids = nlmsg_alloc();
1273 freqs = nlmsg_alloc();
1274 if (!msg || !ssids || !freqs) {
1275 nlmsg_free(msg);
1276 nlmsg_free(ssids);
1277 nlmsg_free(freqs);
1278 return -1;
1279 }
1280
1281 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1282 NL80211_CMD_TRIGGER_SCAN, 0);
1283
1284 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1285
1286 for (i = 0; i < params->num_ssids; i++) {
1287 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1288 params->ssids[i].ssid);
1289 }
1290 if (params->num_ssids)
1291 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1292
1293 if (params->extra_ies) {
1294 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1295 params->extra_ies);
1296 }
1297
1298 if (params->freqs) {
1299 for (i = 0; params->freqs[i]; i++)
1300 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1301 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1302 }
1303
1304 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1305 msg = NULL;
1306 if (ret) {
1307 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1308 "(%s)", ret, strerror(-ret));
1309 goto nla_put_failure;
1310 }
1311
1312 /* Not all drivers generate "scan completed" wireless event, so try to
1313 * read results after a timeout. */
1314 timeout = 10;
1315 if (drv->scan_complete_events) {
1316 /*
1317 * The driver seems to deliver events to notify when scan is
1318 * complete, so use longer timeout to avoid race conditions
1319 * with scanning and following association request.
1320 */
1321 timeout = 30;
1322 }
1323 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1324 "seconds", ret, timeout);
1325 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1326 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1327 drv, drv->ctx);
1328
1329 nla_put_failure:
1330 nlmsg_free(ssids);
1331 nlmsg_free(msg);
1332 nlmsg_free(freqs);
1333 return ret;
1334 }
1335
1336
1337 static int bss_info_handler(struct nl_msg *msg, void *arg)
1338 {
1339 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1340 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1341 struct nlattr *bss[NL80211_BSS_MAX + 1];
1342 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1343 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1344 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1345 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1346 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1347 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1348 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1349 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1350 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1351 };
1352 struct wpa_scan_results *res = arg;
1353 struct wpa_scan_res **tmp;
1354 struct wpa_scan_res *r;
1355 const u8 *ie;
1356 size_t ie_len;
1357
1358 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1359 genlmsg_attrlen(gnlh, 0), NULL);
1360 if (!tb[NL80211_ATTR_BSS])
1361 return NL_SKIP;
1362 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1363 bss_policy))
1364 return NL_SKIP;
1365 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1366 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1367 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1368 } else {
1369 ie = NULL;
1370 ie_len = 0;
1371 }
1372
1373 r = os_zalloc(sizeof(*r) + ie_len);
1374 if (r == NULL)
1375 return NL_SKIP;
1376 if (bss[NL80211_BSS_BSSID])
1377 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1378 ETH_ALEN);
1379 if (bss[NL80211_BSS_FREQUENCY])
1380 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1381 if (bss[NL80211_BSS_BEACON_INTERVAL])
1382 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1383 if (bss[NL80211_BSS_CAPABILITY])
1384 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1385 r->flags |= WPA_SCAN_NOISE_INVALID;
1386 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1387 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1388 r->level /= 100; /* mBm to dBm */
1389 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1390 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1391 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1392 r->flags |= WPA_SCAN_LEVEL_INVALID;
1393 } else
1394 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1395 if (bss[NL80211_BSS_TSF])
1396 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1397 r->ie_len = ie_len;
1398 if (ie)
1399 os_memcpy(r + 1, ie, ie_len);
1400
1401 tmp = os_realloc(res->res,
1402 (res->num + 1) * sizeof(struct wpa_scan_res *));
1403 if (tmp == NULL) {
1404 os_free(r);
1405 return NL_SKIP;
1406 }
1407 tmp[res->num++] = r;
1408 res->res = tmp;
1409
1410 return NL_SKIP;
1411 }
1412
1413
1414 /**
1415 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1416 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1417 * Returns: Scan results on success, -1 on failure
1418 */
1419 static struct wpa_scan_results *
1420 wpa_driver_nl80211_get_scan_results(void *priv)
1421 {
1422 struct wpa_driver_nl80211_data *drv = priv;
1423 struct nl_msg *msg;
1424 struct wpa_scan_results *res;
1425 int ret;
1426
1427 res = os_zalloc(sizeof(*res));
1428 if (res == NULL)
1429 return 0;
1430 msg = nlmsg_alloc();
1431 if (!msg)
1432 goto nla_put_failure;
1433
1434 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1435 NL80211_CMD_GET_SCAN, 0);
1436 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1437
1438 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1439 msg = NULL;
1440 if (ret == 0) {
1441 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1442 (unsigned long) res->num);
1443 return res;
1444 }
1445 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1446 "(%s)", ret, strerror(-ret));
1447 nla_put_failure:
1448 nlmsg_free(msg);
1449 wpa_scan_results_free(res);
1450 return NULL;
1451 }
1452
1453
1454 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1455 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1456 const u8 *seq, size_t seq_len,
1457 const u8 *key, size_t key_len)
1458 {
1459 struct nl_msg *msg;
1460 int ret;
1461
1462 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1463 "set_tx=%d seq_len=%lu key_len=%lu",
1464 __func__, ifindex, alg, addr, key_idx, set_tx,
1465 (unsigned long) seq_len, (unsigned long) key_len);
1466
1467 msg = nlmsg_alloc();
1468 if (!msg)
1469 return -ENOMEM;
1470
1471 if (alg == WPA_ALG_NONE) {
1472 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1473 0, NL80211_CMD_DEL_KEY, 0);
1474 } else {
1475 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1476 0, NL80211_CMD_NEW_KEY, 0);
1477 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1478 switch (alg) {
1479 case WPA_ALG_WEP:
1480 if (key_len == 5)
1481 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1482 0x000FAC01);
1483 else
1484 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1485 0x000FAC05);
1486 break;
1487 case WPA_ALG_TKIP:
1488 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1489 break;
1490 case WPA_ALG_CCMP:
1491 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1492 break;
1493 case WPA_ALG_IGTK:
1494 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1495 break;
1496 default:
1497 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1498 "algorithm %d", __func__, alg);
1499 nlmsg_free(msg);
1500 return -1;
1501 }
1502 }
1503
1504 if (seq)
1505 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1506
1507 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1508 {
1509 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1510 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1511 }
1512 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1513 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1514
1515 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1516 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1517 ret = 0;
1518 if (ret)
1519 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1520 ret, strerror(-ret));
1521
1522 /*
1523 * If we failed or don't need to set the default TX key (below),
1524 * we're done here.
1525 */
1526 if (ret || !set_tx || alg == WPA_ALG_NONE)
1527 return ret;
1528 #ifdef HOSTAPD /* FIX: is this needed? */
1529 if (addr)
1530 return ret;
1531 #endif /* HOSTAPD */
1532
1533 msg = nlmsg_alloc();
1534 if (!msg)
1535 return -ENOMEM;
1536
1537 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1538 0, NL80211_CMD_SET_KEY, 0);
1539 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1540 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1541 if (alg == WPA_ALG_IGTK)
1542 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1543 else
1544 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1545
1546 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1547 if (ret == -ENOENT)
1548 ret = 0;
1549 if (ret)
1550 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1551 "err=%d %s)", ret, strerror(-ret));
1552 return ret;
1553
1554 nla_put_failure:
1555 return -ENOBUFS;
1556 }
1557
1558
1559 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1560 const u8 *addr, int key_idx,
1561 int set_tx, const u8 *seq,
1562 size_t seq_len,
1563 const u8 *key, size_t key_len)
1564 {
1565 struct wpa_driver_nl80211_data *drv = priv;
1566 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1567 seq_len, key, key_len);
1568 }
1569
1570
1571 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1572 const u8 *addr, int cmd, u16 reason_code)
1573 {
1574 int ret = -1;
1575 struct nl_msg *msg;
1576
1577 msg = nlmsg_alloc();
1578 if (!msg)
1579 return -1;
1580
1581 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1582
1583 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1584 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1585 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1586
1587 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1588 msg = NULL;
1589 if (ret) {
1590 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1591 "(%s)", ret, strerror(-ret));
1592 goto nla_put_failure;
1593 }
1594 ret = 0;
1595
1596 nla_put_failure:
1597 nlmsg_free(msg);
1598 return ret;
1599 }
1600
1601
1602 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1603 int reason_code)
1604 {
1605 struct wpa_driver_nl80211_data *drv = priv;
1606 wpa_printf(MSG_DEBUG, "%s", __func__);
1607 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1608 reason_code);
1609 }
1610
1611
1612 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1613 int reason_code)
1614 {
1615 struct wpa_driver_nl80211_data *drv = priv;
1616 wpa_printf(MSG_DEBUG, "%s", __func__);
1617 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1618 reason_code);
1619 }
1620
1621
1622 static int wpa_driver_nl80211_authenticate(
1623 void *priv, struct wpa_driver_auth_params *params)
1624 {
1625 struct wpa_driver_nl80211_data *drv = priv;
1626 int ret = -1, i;
1627 struct nl_msg *msg;
1628 enum nl80211_auth_type type;
1629
1630 drv->associated = 0;
1631
1632 msg = nlmsg_alloc();
1633 if (!msg)
1634 return -1;
1635
1636 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1637 drv->ifindex);
1638
1639 for (i = 0; i < 4; i++) {
1640 if (!params->wep_key[i])
1641 continue;
1642 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1643 i == params->wep_tx_keyidx, NULL, 0,
1644 params->wep_key[i],
1645 params->wep_key_len[i]);
1646 }
1647
1648 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1649 NL80211_CMD_AUTHENTICATE, 0);
1650
1651 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1652 if (params->bssid) {
1653 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1654 MAC2STR(params->bssid));
1655 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1656 }
1657 if (params->freq) {
1658 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1659 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1660 }
1661 if (params->ssid) {
1662 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1663 params->ssid, params->ssid_len);
1664 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1665 params->ssid);
1666 }
1667 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1668 if (params->ie)
1669 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1670 /*
1671 * TODO: if multiple auth_alg options enabled, try them one by one if
1672 * the AP rejects authentication due to unknown auth alg
1673 */
1674 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1675 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1676 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1677 type = NL80211_AUTHTYPE_SHARED_KEY;
1678 else if (params->auth_alg & AUTH_ALG_LEAP)
1679 type = NL80211_AUTHTYPE_NETWORK_EAP;
1680 else if (params->auth_alg & AUTH_ALG_FT)
1681 type = NL80211_AUTHTYPE_FT;
1682 else
1683 goto nla_put_failure;
1684 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1685 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1686
1687 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1688 msg = NULL;
1689 if (ret) {
1690 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1691 "(%s)", ret, strerror(-ret));
1692 goto nla_put_failure;
1693 }
1694 ret = 0;
1695 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1696 "successfully");
1697
1698 nla_put_failure:
1699 nlmsg_free(msg);
1700 return ret;
1701 }
1702
1703
1704 #if defined(CONFIG_AP) || defined(HOSTAPD)
1705
1706 struct phy_info_arg {
1707 u16 *num_modes;
1708 struct hostapd_hw_modes *modes;
1709 };
1710
1711 static int phy_info_handler(struct nl_msg *msg, void *arg)
1712 {
1713 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1714 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1715 struct phy_info_arg *phy_info = arg;
1716
1717 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1718
1719 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1720 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1721 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1722 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1723 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1724 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1725 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1726 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1727 };
1728
1729 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1730 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1731 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1732 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1733 };
1734
1735 struct nlattr *nl_band;
1736 struct nlattr *nl_freq;
1737 struct nlattr *nl_rate;
1738 int rem_band, rem_freq, rem_rate;
1739 struct hostapd_hw_modes *mode;
1740 int idx, mode_is_set;
1741
1742 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1743 genlmsg_attrlen(gnlh, 0), NULL);
1744
1745 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1746 return NL_SKIP;
1747
1748 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1749 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1750 if (!mode)
1751 return NL_SKIP;
1752 phy_info->modes = mode;
1753
1754 mode_is_set = 0;
1755
1756 mode = &phy_info->modes[*(phy_info->num_modes)];
1757 memset(mode, 0, sizeof(*mode));
1758 *(phy_info->num_modes) += 1;
1759
1760 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1761 nla_len(nl_band), NULL);
1762
1763 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1764 mode->ht_capab = nla_get_u16(
1765 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1766 }
1767
1768 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1769 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1770 nla_len(nl_freq), freq_policy);
1771 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1772 continue;
1773 mode->num_channels++;
1774 }
1775
1776 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1777 if (!mode->channels)
1778 return NL_SKIP;
1779
1780 idx = 0;
1781
1782 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1783 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1784 nla_len(nl_freq), freq_policy);
1785 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1786 continue;
1787
1788 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1789 mode->channels[idx].flag = 0;
1790
1791 if (!mode_is_set) {
1792 /* crude heuristic */
1793 if (mode->channels[idx].freq < 4000)
1794 mode->mode = HOSTAPD_MODE_IEEE80211B;
1795 else
1796 mode->mode = HOSTAPD_MODE_IEEE80211A;
1797 mode_is_set = 1;
1798 }
1799
1800 /* crude heuristic */
1801 if (mode->channels[idx].freq < 4000)
1802 if (mode->channels[idx].freq == 2484)
1803 mode->channels[idx].chan = 14;
1804 else
1805 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1806 else
1807 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1808
1809 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1810 mode->channels[idx].flag |=
1811 HOSTAPD_CHAN_DISABLED;
1812 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1813 mode->channels[idx].flag |=
1814 HOSTAPD_CHAN_PASSIVE_SCAN;
1815 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1816 mode->channels[idx].flag |=
1817 HOSTAPD_CHAN_NO_IBSS;
1818 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1819 mode->channels[idx].flag |=
1820 HOSTAPD_CHAN_RADAR;
1821
1822 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1823 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1824 mode->channels[idx].max_tx_power =
1825 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1826
1827 idx++;
1828 }
1829
1830 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1831 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1832 nla_len(nl_rate), rate_policy);
1833 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1834 continue;
1835 mode->num_rates++;
1836 }
1837
1838 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1839 if (!mode->rates)
1840 return NL_SKIP;
1841
1842 idx = 0;
1843
1844 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1845 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1846 nla_len(nl_rate), rate_policy);
1847 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1848 continue;
1849 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1850
1851 /* crude heuristic */
1852 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1853 mode->rates[idx].rate > 200)
1854 mode->mode = HOSTAPD_MODE_IEEE80211G;
1855
1856 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1857 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1858
1859 idx++;
1860 }
1861 }
1862
1863 return NL_SKIP;
1864 }
1865
1866 static struct hostapd_hw_modes *
1867 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1868 {
1869 u16 m;
1870 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1871 int i, mode11g_idx = -1;
1872
1873 /* If only 802.11g mode is included, use it to construct matching
1874 * 802.11b mode data. */
1875
1876 for (m = 0; m < *num_modes; m++) {
1877 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1878 return modes; /* 802.11b already included */
1879 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1880 mode11g_idx = m;
1881 }
1882
1883 if (mode11g_idx < 0)
1884 return modes; /* 2.4 GHz band not supported at all */
1885
1886 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1887 if (nmodes == NULL)
1888 return modes; /* Could not add 802.11b mode */
1889
1890 mode = &nmodes[*num_modes];
1891 os_memset(mode, 0, sizeof(*mode));
1892 (*num_modes)++;
1893 modes = nmodes;
1894
1895 mode->mode = HOSTAPD_MODE_IEEE80211B;
1896
1897 mode11g = &modes[mode11g_idx];
1898 mode->num_channels = mode11g->num_channels;
1899 mode->channels = os_malloc(mode11g->num_channels *
1900 sizeof(struct hostapd_channel_data));
1901 if (mode->channels == NULL) {
1902 (*num_modes)--;
1903 return modes; /* Could not add 802.11b mode */
1904 }
1905 os_memcpy(mode->channels, mode11g->channels,
1906 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1907
1908 mode->num_rates = 0;
1909 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1910 if (mode->rates == NULL) {
1911 os_free(mode->channels);
1912 (*num_modes)--;
1913 return modes; /* Could not add 802.11b mode */
1914 }
1915
1916 for (i = 0; i < mode11g->num_rates; i++) {
1917 if (mode11g->rates[i].rate > 110 ||
1918 mode11g->rates[i].flags &
1919 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1920 continue;
1921 mode->rates[mode->num_rates] = mode11g->rates[i];
1922 mode->num_rates++;
1923 if (mode->num_rates == 4)
1924 break;
1925 }
1926
1927 if (mode->num_rates == 0) {
1928 os_free(mode->channels);
1929 os_free(mode->rates);
1930 (*num_modes)--;
1931 return modes; /* No 802.11b rates */
1932 }
1933
1934 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1935 "information");
1936
1937 return modes;
1938 }
1939
1940
1941 static struct hostapd_hw_modes *
1942 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1943 {
1944 struct wpa_driver_nl80211_data *drv = priv;
1945 struct nl_msg *msg;
1946 struct phy_info_arg result = {
1947 .num_modes = num_modes,
1948 .modes = NULL,
1949 };
1950
1951 *num_modes = 0;
1952 *flags = 0;
1953
1954 msg = nlmsg_alloc();
1955 if (!msg)
1956 return NULL;
1957
1958 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1959 0, NL80211_CMD_GET_WIPHY, 0);
1960
1961 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1962
1963 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1964 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1965 nla_put_failure:
1966 return NULL;
1967 }
1968
1969
1970 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1971 const void *data, size_t len,
1972 int encrypt)
1973 {
1974 __u8 rtap_hdr[] = {
1975 0x00, 0x00, /* radiotap version */
1976 0x0e, 0x00, /* radiotap length */
1977 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1978 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1979 0x00, /* padding */
1980 0x00, 0x00, /* RX and TX flags to indicate that */
1981 0x00, 0x00, /* this is the injected frame directly */
1982 };
1983 struct iovec iov[2] = {
1984 {
1985 .iov_base = &rtap_hdr,
1986 .iov_len = sizeof(rtap_hdr),
1987 },
1988 {
1989 .iov_base = (void *) data,
1990 .iov_len = len,
1991 }
1992 };
1993 struct msghdr msg = {
1994 .msg_name = NULL,
1995 .msg_namelen = 0,
1996 .msg_iov = iov,
1997 .msg_iovlen = 2,
1998 .msg_control = NULL,
1999 .msg_controllen = 0,
2000 .msg_flags = 0,
2001 };
2002
2003 if (encrypt)
2004 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2005
2006 return sendmsg(drv->monitor_sock, &msg, 0);
2007 }
2008
2009
2010 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2011 size_t data_len)
2012 {
2013 struct wpa_driver_nl80211_data *drv = priv;
2014 struct ieee80211_mgmt *mgmt;
2015 int do_not_encrypt = 0;
2016 u16 fc;
2017
2018 mgmt = (struct ieee80211_mgmt *) data;
2019 fc = le_to_host16(mgmt->frame_control);
2020
2021 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2022 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2023 /*
2024 * Only one of the authentication frame types is encrypted.
2025 * In order for static WEP encryption to work properly (i.e.,
2026 * to not encrypt the frame), we need to tell mac80211 about
2027 * the frames that must not be encrypted.
2028 */
2029 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2030 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2031 if (auth_alg == WLAN_AUTH_OPEN ||
2032 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2033 do_not_encrypt = 1;
2034 }
2035
2036 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2037 !do_not_encrypt);
2038 }
2039
2040
2041 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2042 const u8 *head, size_t head_len,
2043 const u8 *tail, size_t tail_len,
2044 int dtim_period)
2045 {
2046 struct wpa_driver_nl80211_data *drv = priv;
2047 struct nl_msg *msg;
2048 u8 cmd = NL80211_CMD_NEW_BEACON;
2049 int ret;
2050 int beacon_set;
2051 #ifdef HOSTAPD
2052 struct i802_bss *bss;
2053
2054 bss = get_bss(drv, ifindex);
2055 if (bss == NULL)
2056 return -ENOENT;
2057 beacon_set = bss->beacon_set;
2058 #else /* HOSTAPD */
2059 beacon_set = drv->beacon_set;
2060 #endif /* HOSTAPD */
2061
2062 msg = nlmsg_alloc();
2063 if (!msg)
2064 return -ENOMEM;
2065
2066 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2067 beacon_set);
2068 if (beacon_set)
2069 cmd = NL80211_CMD_SET_BEACON;
2070
2071 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2072 0, cmd, 0);
2073 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2074 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2075 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2076 if (!drv->beacon_int)
2077 drv->beacon_int = 100;
2078 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2079 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2080
2081 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2082 if (ret) {
2083 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2084 ret, strerror(-ret));
2085 } else {
2086 #ifdef HOSTAPD
2087 bss->beacon_set = 1;
2088 #else /* HOSTAPD */
2089 drv->beacon_set = 1;
2090 #endif /* HOSTAPD */
2091 }
2092 return ret;
2093 nla_put_failure:
2094 return -ENOBUFS;
2095 }
2096
2097
2098 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2099 {
2100 struct wpa_driver_nl80211_data *drv = priv;
2101 struct nl_msg *msg;
2102
2103 drv->beacon_int = value;
2104
2105 #ifdef HOSTAPD
2106 if (!drv->bss.beacon_set)
2107 return 0;
2108 #else /* HOSTAPD */
2109 if (!drv->beacon_set)
2110 return 0;
2111 #endif /* HOSTAPD */
2112
2113 msg = nlmsg_alloc();
2114 if (!msg)
2115 return -ENOMEM;
2116
2117 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2118 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2119 0, NL80211_CMD_SET_BEACON, 0);
2120 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2121
2122 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2123
2124 return send_and_recv_msgs(drv, msg, NULL, NULL);
2125 nla_put_failure:
2126 return -ENOBUFS;
2127 }
2128
2129
2130 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2131 int freq, int ht_enabled,
2132 int sec_channel_offset)
2133 {
2134 struct nl_msg *msg;
2135 int ret;
2136
2137 msg = nlmsg_alloc();
2138 if (!msg)
2139 return -1;
2140
2141 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2142 NL80211_CMD_SET_WIPHY, 0);
2143
2144 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2145 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2146 if (ht_enabled) {
2147 switch (sec_channel_offset) {
2148 case -1:
2149 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2150 NL80211_CHAN_HT40MINUS);
2151 break;
2152 case 1:
2153 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2154 NL80211_CHAN_HT40PLUS);
2155 break;
2156 default:
2157 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2158 NL80211_CHAN_HT20);
2159 break;
2160 }
2161 }
2162
2163 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2164 if (ret == 0)
2165 return 0;
2166 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2167 "%d (%s)", freq, ret, strerror(-ret));
2168 nla_put_failure:
2169 return -1;
2170 }
2171
2172 #endif /* CONFIG_AP || HOSTAPD */
2173
2174
2175 #ifdef CONFIG_AP
2176
2177 static int wpa_driver_nl80211_set_beacon(void *priv,
2178 const u8 *head, size_t head_len,
2179 const u8 *tail, size_t tail_len,
2180 int dtim_period)
2181 {
2182 struct wpa_driver_nl80211_data *drv = priv;
2183 return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2184 head, head_len,
2185 tail, tail_len,
2186 dtim_period);
2187 }
2188
2189 #endif /* CONFIG_AP */
2190
2191 #if defined(CONFIG_AP) || defined(HOSTAPD)
2192
2193 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2194 int ifidx)
2195 {
2196 struct nl_msg *msg;
2197
2198 #ifdef HOSTAPD
2199 /* stop listening for EAPOL on this interface */
2200 del_ifidx(drv, ifidx);
2201 #endif /* HOSTAPD */
2202
2203 msg = nlmsg_alloc();
2204 if (!msg)
2205 goto nla_put_failure;
2206
2207 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2208 0, NL80211_CMD_DEL_INTERFACE, 0);
2209 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2210
2211 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2212 return;
2213 nla_put_failure:
2214 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2215 ifidx);
2216 }
2217
2218
2219 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2220 const char *ifname, enum nl80211_iftype iftype,
2221 const u8 *addr)
2222 {
2223 struct nl_msg *msg, *flags = NULL;
2224 int ifidx;
2225 int ret = -ENOBUFS;
2226 #ifdef HOSTAPD
2227 struct ifreq ifreq;
2228 struct iwreq iwr;
2229 #endif /* HOSTAPD */
2230
2231 msg = nlmsg_alloc();
2232 if (!msg)
2233 return -1;
2234
2235 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2236 0, NL80211_CMD_NEW_INTERFACE, 0);
2237 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2238 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2239 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2240
2241 if (iftype == NL80211_IFTYPE_MONITOR) {
2242 int err;
2243
2244 flags = nlmsg_alloc();
2245 if (!flags)
2246 goto nla_put_failure;
2247
2248 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2249
2250 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2251
2252 nlmsg_free(flags);
2253
2254 if (err)
2255 goto nla_put_failure;
2256 }
2257
2258 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2259 if (ret) {
2260 nla_put_failure:
2261 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2262 ifname);
2263 return ret;
2264 }
2265
2266 ifidx = if_nametoindex(ifname);
2267
2268 if (ifidx <= 0)
2269 return -1;
2270
2271 #ifdef HOSTAPD
2272 /* start listening for EAPOL on this interface */
2273 add_ifidx(drv, ifidx);
2274
2275 if (addr) {
2276 switch (iftype) {
2277 case NL80211_IFTYPE_AP:
2278 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2279 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2280 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2281
2282 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2283 nl80211_remove_iface(drv, ifidx);
2284 return -1;
2285 }
2286 break;
2287 case NL80211_IFTYPE_WDS:
2288 memset(&iwr, 0, sizeof(iwr));
2289 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2290 iwr.u.addr.sa_family = ARPHRD_ETHER;
2291 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2292 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2293 return -1;
2294 break;
2295 default:
2296 /* nothing */
2297 break;
2298 }
2299 }
2300 #endif /* HOSTAPD */
2301
2302 return ifidx;
2303 }
2304
2305 #endif /* CONFIG_AP || HOSTAPD */
2306
2307 #ifdef CONFIG_AP
2308
2309 void ap_tx_status(void *ctx, const u8 *addr,
2310 const u8 *buf, size_t len, int ack);
2311 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2312 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2313 struct hostapd_frame_info *fi);
2314 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2315
2316 #endif /* CONFIG_AP */
2317
2318 #if defined(CONFIG_AP) || defined(HOSTAPD)
2319
2320 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2321 {
2322 struct ieee80211_hdr *hdr;
2323 u16 fc, type, stype;
2324
2325 hdr = (struct ieee80211_hdr *) buf;
2326 fc = le_to_host16(hdr->frame_control);
2327
2328 type = WLAN_FC_GET_TYPE(fc);
2329 stype = WLAN_FC_GET_STYPE(fc);
2330
2331 switch (type) {
2332 case WLAN_FC_TYPE_MGMT:
2333 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2334 ok ? "ACK" : "fail");
2335 #ifdef HOSTAPD
2336 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2337 #else /* HOSTAPD */
2338 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2339 #endif /* HOSTAPD */
2340 break;
2341 case WLAN_FC_TYPE_CTRL:
2342 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2343 ok ? "ACK" : "fail");
2344 break;
2345 case WLAN_FC_TYPE_DATA:
2346 #ifdef HOSTAPD
2347 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2348 #else /* HOSTAPD */
2349 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2350 #endif /* HOSTAPD */
2351 break;
2352 default:
2353 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2354 type);
2355 break;
2356 }
2357 }
2358
2359
2360 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2361 u8 *buf, size_t len,
2362 struct hostapd_frame_info *hfi,
2363 enum ieee80211_msg_type msg_type)
2364 {
2365 struct ieee80211_hdr *hdr;
2366 u16 fc, type, stype;
2367 size_t data_len = len;
2368 u8 *bssid;
2369 void *ctx = drv->ctx;
2370 #ifdef HOSTAPD
2371 struct hostapd_iface *iface = drv->hapd->iface;
2372 struct hostapd_data *hapd = NULL;
2373 int broadcast_bssid = 0;
2374 size_t i;
2375 #endif /* HOSTAPD */
2376
2377 /*
2378 * PS-Poll frames are 16 bytes. All other frames are
2379 * 24 bytes or longer.
2380 */
2381 if (len < 16)
2382 return;
2383
2384 hdr = (struct ieee80211_hdr *) buf;
2385 fc = le_to_host16(hdr->frame_control);
2386
2387 type = WLAN_FC_GET_TYPE(fc);
2388 stype = WLAN_FC_GET_STYPE(fc);
2389
2390 switch (type) {
2391 case WLAN_FC_TYPE_DATA:
2392 if (len < 24)
2393 return;
2394 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2395 case WLAN_FC_TODS:
2396 bssid = hdr->addr1;
2397 break;
2398 case WLAN_FC_FROMDS:
2399 bssid = hdr->addr2;
2400 break;
2401 default:
2402 /* discard */
2403 return;
2404 }
2405 break;
2406 case WLAN_FC_TYPE_CTRL:
2407 /* discard non-ps-poll frames */
2408 if (stype != WLAN_FC_STYPE_PSPOLL)
2409 return;
2410 bssid = hdr->addr1;
2411 break;
2412 case WLAN_FC_TYPE_MGMT:
2413 bssid = hdr->addr3;
2414 break;
2415 default:
2416 /* discard */
2417 return;
2418 }
2419
2420 #ifdef HOSTAPD
2421 /* find interface frame belongs to */
2422 for (i = 0; i < iface->num_bss; i++) {
2423 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
2424 hapd = iface->bss[i];
2425 break;
2426 }
2427 }
2428
2429 if (hapd == NULL) {
2430 hapd = iface->bss[0];
2431
2432 if (bssid[0] != 0xff || bssid[1] != 0xff ||
2433 bssid[2] != 0xff || bssid[3] != 0xff ||
2434 bssid[4] != 0xff || bssid[5] != 0xff) {
2435 /*
2436 * Unknown BSSID - drop frame if this is not from
2437 * passive scanning or a beacon (at least ProbeReq
2438 * frames to other APs may be allowed through RX
2439 * filtering in the wlan hw/driver)
2440 */
2441 if ((type != WLAN_FC_TYPE_MGMT ||
2442 stype != WLAN_FC_STYPE_BEACON))
2443 return;
2444 } else
2445 broadcast_bssid = 1;
2446 }
2447 ctx = hapd;
2448 #endif /* HOSTAPD */
2449
2450 switch (msg_type) {
2451 case ieee80211_msg_normal:
2452 /* continue processing */
2453 break;
2454 case ieee80211_msg_tx_callback_ack:
2455 handle_tx_callback(ctx, buf, data_len, 1);
2456 return;
2457 case ieee80211_msg_tx_callback_fail:
2458 handle_tx_callback(ctx, buf, data_len, 0);
2459 return;
2460 }
2461
2462 switch (type) {
2463 case WLAN_FC_TYPE_MGMT:
2464 if (stype != WLAN_FC_STYPE_BEACON &&
2465 stype != WLAN_FC_STYPE_PROBE_REQ)
2466 wpa_printf(MSG_MSGDUMP, "MGMT");
2467 #ifdef HOSTAPD
2468 if (broadcast_bssid) {
2469 for (i = 0; i < iface->num_bss; i++)
2470 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
2471 stype, hfi);
2472 } else
2473 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
2474 #else /* HOSTAPD */
2475 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2476 #endif /* HOSTAPD */
2477 break;
2478 case WLAN_FC_TYPE_CTRL:
2479 /* can only get here with PS-Poll frames */
2480 wpa_printf(MSG_DEBUG, "CTRL");
2481 #ifdef HOSTAPD
2482 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2483 #else /* HOSTAPD */
2484 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2485 #endif /* HOSTAPD */
2486 break;
2487 case WLAN_FC_TYPE_DATA:
2488 #ifdef HOSTAPD
2489 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2490 #else /* HOSTAPD */
2491 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2492 #endif /* HOSTAPD */
2493 break;
2494 }
2495 }
2496
2497
2498 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2499 {
2500 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2501 int len;
2502 unsigned char buf[3000];
2503 struct ieee80211_radiotap_iterator iter;
2504 int ret;
2505 struct hostapd_frame_info hfi;
2506 int injected = 0, failed = 0, msg_type, rxflags = 0;
2507
2508 len = recv(sock, buf, sizeof(buf), 0);
2509 if (len < 0) {
2510 perror("recv");
2511 return;
2512 }
2513
2514 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2515 printf("received invalid radiotap frame\n");
2516 return;
2517 }
2518
2519 memset(&hfi, 0, sizeof(hfi));
2520
2521 while (1) {
2522 ret = ieee80211_radiotap_iterator_next(&iter);
2523 if (ret == -ENOENT)
2524 break;
2525 if (ret) {
2526 printf("received invalid radiotap frame (%d)\n", ret);
2527 return;
2528 }
2529 switch (iter.this_arg_index) {
2530 case IEEE80211_RADIOTAP_FLAGS:
2531 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2532 len -= 4;
2533 break;
2534 case IEEE80211_RADIOTAP_RX_FLAGS:
2535 rxflags = 1;
2536 break;
2537 case IEEE80211_RADIOTAP_TX_FLAGS:
2538 injected = 1;
2539 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2540 IEEE80211_RADIOTAP_F_TX_FAIL;
2541 break;
2542 case IEEE80211_RADIOTAP_DATA_RETRIES:
2543 break;
2544 case IEEE80211_RADIOTAP_CHANNEL:
2545 /* TODO convert from freq/flags to channel number
2546 hfi.channel = XXX;
2547 hfi.phytype = XXX;
2548 */
2549 break;
2550 case IEEE80211_RADIOTAP_RATE:
2551 hfi.datarate = *iter.this_arg * 5;
2552 break;
2553 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2554 hfi.ssi_signal = *iter.this_arg;
2555 break;
2556 }
2557 }
2558
2559 if (rxflags && injected)
2560 return;
2561
2562 if (!injected)
2563 msg_type = ieee80211_msg_normal;
2564 else if (failed)
2565 msg_type = ieee80211_msg_tx_callback_fail;
2566 else
2567 msg_type = ieee80211_msg_tx_callback_ack;
2568
2569 handle_frame(drv, buf + iter.max_length,
2570 len - iter.max_length, &hfi, msg_type);
2571 }
2572
2573
2574 /*
2575 * we post-process the filter code later and rewrite
2576 * this to the offset to the last instruction
2577 */
2578 #define PASS 0xFF
2579 #define FAIL 0xFE
2580
2581 static struct sock_filter msock_filter_insns[] = {
2582 /*
2583 * do a little-endian load of the radiotap length field
2584 */
2585 /* load lower byte into A */
2586 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2587 /* put it into X (== index register) */
2588 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2589 /* load upper byte into A */
2590 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2591 /* left-shift it by 8 */
2592 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2593 /* or with X */
2594 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2595 /* put result into X */
2596 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2597
2598 /*
2599 * Allow management frames through, this also gives us those
2600 * management frames that we sent ourselves with status
2601 */
2602 /* load the lower byte of the IEEE 802.11 frame control field */
2603 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2604 /* mask off frame type and version */
2605 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2606 /* accept frame if it's both 0, fall through otherwise */
2607 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2608
2609 /*
2610 * TODO: add a bit to radiotap RX flags that indicates
2611 * that the sending station is not associated, then
2612 * add a filter here that filters on our DA and that flag
2613 * to allow us to deauth frames to that bad station.
2614 *
2615 * Not a regression -- we didn't do it before either.
2616 */
2617
2618 #if 0
2619 /*
2620 * drop non-data frames, WDS frames
2621 */
2622 /* load the lower byte of the frame control field */
2623 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2624 /* mask off QoS bit */
2625 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2626 /* drop non-data frames */
2627 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2628 /* load the upper byte of the frame control field */
2629 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2630 /* mask off toDS/fromDS */
2631 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2632 /* drop WDS frames */
2633 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2634 #endif
2635
2636 /*
2637 * add header length to index
2638 */
2639 /* load the lower byte of the frame control field */
2640 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2641 /* mask off QoS bit */
2642 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2643 /* right shift it by 6 to give 0 or 2 */
2644 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2645 /* add data frame header length */
2646 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2647 /* add index, was start of 802.11 header */
2648 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2649 /* move to index, now start of LL header */
2650 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2651
2652 /*
2653 * Accept empty data frames, we use those for
2654 * polling activity.
2655 */
2656 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2657 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2658
2659 /*
2660 * Accept EAPOL frames
2661 */
2662 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2663 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2664 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2665 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2666
2667 /* keep these last two statements or change the code below */
2668 /* return 0 == "DROP" */
2669 BPF_STMT(BPF_RET | BPF_K, 0),
2670 /* return ~0 == "keep all" */
2671 BPF_STMT(BPF_RET | BPF_K, ~0),
2672 };
2673
2674 static struct sock_fprog msock_filter = {
2675 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2676 .filter = msock_filter_insns,
2677 };
2678
2679
2680 static int add_monitor_filter(int s)
2681 {
2682 int idx;
2683
2684 /* rewrite all PASS/FAIL jump offsets */
2685 for (idx = 0; idx < msock_filter.len; idx++) {
2686 struct sock_filter *insn = &msock_filter_insns[idx];
2687
2688 if (BPF_CLASS(insn->code) == BPF_JMP) {
2689 if (insn->code == (BPF_JMP|BPF_JA)) {
2690 if (insn->k == PASS)
2691 insn->k = msock_filter.len - idx - 2;
2692 else if (insn->k == FAIL)
2693 insn->k = msock_filter.len - idx - 3;
2694 }
2695
2696 if (insn->jt == PASS)
2697 insn->jt = msock_filter.len - idx - 2;
2698 else if (insn->jt == FAIL)
2699 insn->jt = msock_filter.len - idx - 3;
2700
2701 if (insn->jf == PASS)
2702 insn->jf = msock_filter.len - idx - 2;
2703 else if (insn->jf == FAIL)
2704 insn->jf = msock_filter.len - idx - 3;
2705 }
2706 }
2707
2708 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2709 &msock_filter, sizeof(msock_filter))) {
2710 perror("SO_ATTACH_FILTER");
2711 return -1;
2712 }
2713
2714 return 0;
2715 }
2716
2717
2718 static int
2719 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2720 {
2721 char buf[IFNAMSIZ];
2722 struct sockaddr_ll ll;
2723 int optval;
2724 socklen_t optlen;
2725
2726 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2727 buf[IFNAMSIZ - 1] = '\0';
2728
2729 drv->monitor_ifidx =
2730 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2731
2732 if (drv->monitor_ifidx < 0)
2733 return -1;
2734
2735 if (hostapd_set_iface_flags(drv, buf, 1))
2736 goto error;
2737
2738 memset(&ll, 0, sizeof(ll));
2739 ll.sll_family = AF_PACKET;
2740 ll.sll_ifindex = drv->monitor_ifidx;
2741 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2742 if (drv->monitor_sock < 0) {
2743 perror("socket[PF_PACKET,SOCK_RAW]");
2744 goto error;
2745 }
2746
2747 if (add_monitor_filter(drv->monitor_sock)) {
2748 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2749 "interface; do filtering in user space");
2750 /* This works, but will cost in performance. */
2751 }
2752
2753 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2754 perror("monitor socket bind");
2755 goto error;
2756 }
2757
2758 optlen = sizeof(optval);
2759 optval = 20;
2760 if (setsockopt
2761 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2762 perror("Failed to set socket priority");
2763 goto error;
2764 }
2765
2766 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2767 drv, NULL)) {
2768 printf("Could not register monitor read socket\n");
2769 goto error;
2770 }
2771
2772 return 0;
2773 error:
2774 nl80211_remove_iface(drv, drv->monitor_ifidx);
2775 return -1;
2776 }
2777
2778 #endif /* CONFIG_AP || HOSTAPD */
2779
2780 #ifdef CONFIG_AP
2781
2782 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2783 struct wpa_driver_associate_params *params)
2784 {
2785 if (drv->monitor_ifidx < 0 &&
2786 nl80211_create_monitor_interface(drv))
2787 return -1;
2788
2789 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2790 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2791 nl80211_remove_iface(drv, drv->monitor_ifidx);
2792 drv->monitor_ifidx = -1;
2793 return -1;
2794 }
2795
2796 /* TODO: setup monitor interface (and add code somewhere to remove this
2797 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2798
2799 return 0;
2800 }
2801 #endif /* CONFIG_AP */
2802
2803
2804 static int wpa_driver_nl80211_associate(
2805 void *priv, struct wpa_driver_associate_params *params)
2806 {
2807 struct wpa_driver_nl80211_data *drv = priv;
2808 int ret = -1;
2809 struct nl_msg *msg;
2810
2811 #ifdef CONFIG_AP
2812 if (params->mode == 2)
2813 return wpa_driver_nl80211_ap(drv, params);
2814 #endif /* CONFIG_AP */
2815
2816 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2817 params->drop_unencrypted);
2818
2819 drv->associated = 0;
2820
2821 msg = nlmsg_alloc();
2822 if (!msg)
2823 return -1;
2824
2825 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2826 drv->ifindex);
2827 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2828 NL80211_CMD_ASSOCIATE, 0);
2829
2830 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2831 if (params->bssid) {
2832 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2833 MAC2STR(params->bssid));
2834 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2835 }
2836 if (params->freq) {
2837 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2838 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2839 }
2840 if (params->ssid) {
2841 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2842 params->ssid, params->ssid_len);
2843 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2844 params->ssid);
2845 if (params->ssid_len > sizeof(drv->ssid))
2846 goto nla_put_failure;
2847 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2848 drv->ssid_len = params->ssid_len;
2849 }
2850 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2851 if (params->wpa_ie)
2852 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2853 params->wpa_ie);
2854
2855 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2856 msg = NULL;
2857 if (ret) {
2858 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2859 "(%s)", ret, strerror(-ret));
2860 goto nla_put_failure;
2861 }
2862 ret = 0;
2863 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2864 "successfully");
2865
2866 nla_put_failure:
2867 nlmsg_free(msg);
2868 return ret;
2869 }
2870
2871
2872 /**
2873 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2874 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2875 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2876 * Returns: 0 on success, -1 on failure
2877 */
2878 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2879 int mode)
2880 {
2881 int ret = -1;
2882 struct nl_msg *msg;
2883 int nlmode;
2884
2885 switch (mode) {
2886 case 0:
2887 nlmode = NL80211_IFTYPE_STATION;
2888 break;
2889 case 1:
2890 nlmode = NL80211_IFTYPE_ADHOC;
2891 break;
2892 case 2:
2893 nlmode = NL80211_IFTYPE_AP;
2894 break;
2895 default:
2896 return -1;
2897 }
2898
2899 msg = nlmsg_alloc();
2900 if (!msg)
2901 return -1;
2902
2903 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2904 0, NL80211_CMD_SET_INTERFACE, 0);
2905 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2906 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2907
2908 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2909 if (!ret)
2910 return 0;
2911 else
2912 goto try_again;
2913
2914 nla_put_failure:
2915 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2916 ret, strerror(-ret));
2917 return -1;
2918
2919 try_again:
2920 /* mac80211 doesn't allow mode changes while the device is up, so
2921 * take the device down, try to set the mode again, and bring the
2922 * device back up.
2923 */
2924 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2925 /* Try to set the mode again while the interface is down */
2926 msg = nlmsg_alloc();
2927 if (!msg)
2928 return -1;
2929
2930 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2931 0, NL80211_CMD_SET_INTERFACE, 0);
2932 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2933 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2934 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2935 if (ret) {
2936 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2937 "mode(try_again): %d (%s)",
2938 drv->ifname, ret, strerror(-ret));
2939 }
2940
2941 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2942 ret = -1;
2943 }
2944
2945 return ret;
2946 }
2947
2948
2949 static int wpa_driver_nl80211_get_capa(void *priv,
2950 struct wpa_driver_capa *capa)
2951 {
2952 struct wpa_driver_nl80211_data *drv = priv;
2953 if (!drv->has_capability)
2954 return -1;
2955 os_memcpy(capa, &drv->capa, sizeof(*capa));
2956 return 0;
2957 }
2958
2959
2960 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2961 {
2962 struct wpa_driver_nl80211_data *drv = priv;
2963
2964 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2965 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2966 drv->operstate = state;
2967 return wpa_driver_nl80211_send_oper_ifla(
2968 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2969 }
2970
2971
2972 #ifdef HOSTAPD
2973
2974 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2975
2976 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2977 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2978
2979
2980 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2981 int ifindex)
2982 {
2983 struct i802_bss *bss = &drv->bss;
2984 while (bss) {
2985 if (ifindex == bss->ifindex)
2986 return bss;
2987 bss = bss->next;
2988 }
2989 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2990 return NULL;
2991 }
2992
2993
2994 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2995 {
2996 int i;
2997 int *old;
2998
2999 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3000 ifidx);
3001 for (i = 0; i < drv->num_if_indices; i++) {
3002 if (drv->if_indices[i] == 0) {
3003 drv->if_indices[i] = ifidx;
3004 return;
3005 }
3006 }
3007
3008 if (drv->if_indices != drv->default_if_indices)
3009 old = drv->if_indices;
3010 else
3011 old = NULL;
3012
3013 drv->if_indices = realloc(old,
3014 sizeof(int) * (drv->num_if_indices + 1));
3015 if (!drv->if_indices) {
3016 if (!old)
3017 drv->if_indices = drv->default_if_indices;
3018 else
3019 drv->if_indices = old;
3020 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3021 "interfaces");
3022 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3023 return;
3024 }
3025 drv->if_indices[drv->num_if_indices] = ifidx;
3026 drv->num_if_indices++;
3027 }
3028
3029
3030 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3031 {
3032 int i;
3033
3034 for (i = 0; i < drv->num_if_indices; i++) {
3035 if (drv->if_indices[i] == ifidx) {
3036 drv->if_indices[i] = 0;
3037 break;
3038 }
3039 }
3040 }
3041
3042
3043 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3044 {
3045 int i;
3046
3047 for (i = 0; i < drv->num_if_indices; i++)
3048 if (drv->if_indices[i] == ifidx)
3049 return 1;
3050
3051 return 0;
3052 }
3053
3054
3055 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3056 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3057 size_t seq_len, const u8 *key, size_t key_len)
3058 {
3059 struct wpa_driver_nl80211_data *drv = priv;
3060 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3061 set_tx, seq, seq_len, key, key_len);
3062 }
3063
3064
3065 static inline int min_int(int a, int b)
3066 {
3067 if (a < b)
3068 return a;
3069 return b;
3070 }
3071
3072
3073 static int get_key_handler(struct nl_msg *msg, void *arg)
3074 {
3075 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3076 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3077
3078 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3079 genlmsg_attrlen(gnlh, 0), NULL);
3080
3081 /*
3082 * TODO: validate the key index and mac address!
3083 * Otherwise, there's a race condition as soon as
3084 * the kernel starts sending key notifications.
3085 */
3086
3087 if (tb[NL80211_ATTR_KEY_SEQ])
3088 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3089 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3090 return NL_SKIP;
3091 }
3092
3093
3094 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3095 int idx, u8 *seq)
3096 {
3097 struct wpa_driver_nl80211_data *drv = priv;
3098 struct nl_msg *msg;
3099
3100 msg = nlmsg_alloc();
3101 if (!msg)
3102 return -ENOMEM;
3103
3104 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3105 0, NL80211_CMD_GET_KEY, 0);
3106
3107 if (addr)
3108 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3109 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3110 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3111
3112 memset(seq, 0, 6);
3113
3114 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3115 nla_put_failure:
3116 return -ENOBUFS;
3117 }
3118
3119
3120 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3121 int mode)
3122 {
3123 struct wpa_driver_nl80211_data *drv = priv;
3124 struct nl_msg *msg;
3125 u8 rates[NL80211_MAX_SUPP_RATES];
3126 u8 rates_len = 0;
3127 int i;
3128
3129 msg = nlmsg_alloc();
3130 if (!msg)
3131 return -ENOMEM;
3132
3133 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3134 NL80211_CMD_SET_BSS, 0);
3135
3136 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3137 rates[rates_len++] = basic_rates[i] / 5;
3138
3139 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3140
3141 /* TODO: multi-BSS support */
3142 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3143
3144 return send_and_recv_msgs(drv, msg, NULL, NULL);
3145 nla_put_failure:
3146 return -ENOBUFS;
3147 }
3148
3149
3150 /* Set kernel driver on given frequency (MHz) */
3151 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3152 {
3153 struct wpa_driver_nl80211_data *drv = priv;
3154 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3155 freq->sec_channel_offset);
3156 }
3157
3158
3159 static int i802_set_rts(void *priv, int rts)
3160 {
3161 struct wpa_driver_nl80211_data *drv = priv;
3162 struct iwreq iwr;
3163
3164 memset(&iwr, 0, sizeof(iwr));
3165 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3166 iwr.u.rts.value = rts;
3167 iwr.u.rts.fixed = 1;
3168
3169 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3170 perror("ioctl[SIOCSIWRTS]");
3171 return -1;
3172 }
3173
3174 return 0;
3175 }
3176
3177
3178 static int i802_set_frag(void *priv, int frag)
3179 {
3180 struct wpa_driver_nl80211_data *drv = priv;
3181 struct iwreq iwr;
3182
3183 memset(&iwr, 0, sizeof(iwr));
3184 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3185 iwr.u.frag.value = frag;
3186 iwr.u.frag.fixed = 1;
3187
3188 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3189 perror("ioctl[SIOCSIWFRAG]");
3190 return -1;
3191 }
3192
3193 return 0;
3194 }
3195
3196
3197 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3198 {
3199 struct wpa_driver_nl80211_data *drv = priv;
3200 struct iwreq iwr;
3201
3202 memset(&iwr, 0, sizeof(iwr));
3203 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3204
3205 iwr.u.retry.value = short_retry;
3206 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3207 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3208 perror("ioctl[SIOCSIWRETRY(short)]");
3209 return -1;
3210 }
3211
3212 iwr.u.retry.value = long_retry;
3213 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3214 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3215 perror("ioctl[SIOCSIWRETRY(long)]");
3216 return -1;
3217 }
3218
3219 return 0;
3220 }
3221
3222
3223 static int i802_flush(void *priv)
3224 {
3225 struct wpa_driver_nl80211_data *drv = priv;
3226 struct nl_msg *msg;
3227
3228 msg = nlmsg_alloc();
3229 if (!msg)
3230 return -1;
3231
3232 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3233 0, NL80211_CMD_DEL_STATION, 0);
3234
3235 /*
3236 * XXX: FIX! this needs to flush all VLANs too
3237 */
3238 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3239 if_nametoindex(drv->ifname));
3240
3241 return send_and_recv_msgs(drv, msg, NULL, NULL);
3242 nla_put_failure:
3243 return -ENOBUFS;
3244 }
3245
3246
3247 static int get_sta_handler(struct nl_msg *msg, void *arg)
3248 {
3249 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3250 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3251 struct hostap_sta_driver_data *data = arg;
3252 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3253 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3254 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3255 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3256 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3257 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3258 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3259 };
3260
3261 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3262 genlmsg_attrlen(gnlh, 0), NULL);
3263
3264 /*
3265 * TODO: validate the interface and mac address!
3266 * Otherwise, there's a race condition as soon as
3267 * the kernel starts sending station notifications.
3268 */
3269
3270 if (!tb[NL80211_ATTR_STA_INFO]) {
3271 wpa_printf(MSG_DEBUG, "sta stats missing!");
3272 return NL_SKIP;
3273 }
3274 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3275 tb[NL80211_ATTR_STA_INFO],
3276 stats_policy)) {
3277 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3278 return NL_SKIP;
3279 }
3280
3281 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3282 data->inactive_msec =
3283 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3284 if (stats[NL80211_STA_INFO_RX_BYTES])
3285 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3286 if (stats[NL80211_STA_INFO_TX_BYTES])
3287 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3288 if (stats[NL80211_STA_INFO_RX_PACKETS])
3289 data->rx_packets =
3290 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3291 if (stats[NL80211_STA_INFO_TX_PACKETS])
3292 data->tx_packets =
3293 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3294
3295 return NL_SKIP;
3296 }
3297
3298 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3299 const u8 *addr)
3300 {
3301 struct wpa_driver_nl80211_data *drv = priv;
3302 struct nl_msg *msg;
3303
3304 os_memset(data, 0, sizeof(*data));
3305 msg = nlmsg_alloc();
3306 if (!msg)
3307 return -ENOMEM;
3308
3309 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3310 0, NL80211_CMD_GET_STATION, 0);
3311
3312 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3313 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3314
3315 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3316 nla_put_failure:
3317 return -ENOBUFS;
3318 }
3319
3320
3321 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3322 size_t data_len, int encrypt, const u8 *own_addr)
3323 {
3324 struct wpa_driver_nl80211_data *drv = priv;
3325 struct ieee80211_hdr *hdr;
3326 size_t len;
3327 u8 *pos;
3328 int res;
3329 #if 0 /* FIX */
3330 int qos = sta->flags & WLAN_STA_WME;
3331 #else
3332 int qos = 0;
3333 #endif
3334
3335 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3336 data_len;
3337 hdr = os_zalloc(len);
3338 if (hdr == NULL) {
3339 printf("malloc() failed for i802_send_data(len=%lu)\n",
3340 (unsigned long) len);
3341 return -1;
3342 }
3343
3344 hdr->frame_control =
3345 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3346 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3347 if (encrypt)
3348 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3349 #if 0 /* To be enabled if qos determination is added above */
3350 if (qos) {
3351 hdr->frame_control |=
3352 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3353 }
3354 #endif
3355
3356 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3357 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3358 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3359 pos = (u8 *) (hdr + 1);
3360
3361 #if 0 /* To be enabled if qos determination is added above */
3362 if (qos) {
3363 /* add an empty QoS header if needed */
3364 pos[0] = 0;
3365 pos[1] = 0;
3366 pos += 2;
3367 }
3368 #endif
3369
3370 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3371 pos += sizeof(rfc1042_header);
3372 WPA_PUT_BE16(pos, ETH_P_PAE);
3373 pos += 2;
3374 memcpy(pos, data, data_len);
3375
3376 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3377 if (res < 0) {
3378 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3379 "failed: %d (%s)",
3380 (unsigned long) len, errno, strerror(errno));
3381 }
3382 free(hdr);
3383
3384 return res;
3385 }
3386
3387
3388 static int i802_sta_add(const char *ifname, void *priv,
3389 struct hostapd_sta_add_params *params)
3390 {
3391 struct wpa_driver_nl80211_data *drv = priv;
3392 struct nl_msg *msg;
3393 int ret = -ENOBUFS;
3394
3395 msg = nlmsg_alloc();
3396 if (!msg)
3397 return -ENOMEM;
3398
3399 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3400 0, NL80211_CMD_NEW_STATION, 0);
3401
3402 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3403 if_nametoindex(drv->ifname));
3404 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3405 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3406 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3407 params->supp_rates);
3408 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3409 params->listen_interval);
3410
3411 #ifdef CONFIG_IEEE80211N
3412 if (params->ht_capabilities) {
3413 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3414 params->ht_capabilities->length,
3415 &params->ht_capabilities->data);
3416 }
3417 #endif /* CONFIG_IEEE80211N */
3418
3419 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3420 if (ret)
3421 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3422 "result: %d (%s)", ret, strerror(-ret));
3423 if (ret == -EEXIST)
3424 ret = 0;
3425 nla_put_failure:
3426 return ret;
3427 }
3428
3429
3430 static int i802_sta_remove(void *priv, const u8 *addr)
3431 {
3432 struct wpa_driver_nl80211_data *drv = priv;
3433 struct nl_msg *msg;
3434 int ret;
3435
3436 msg = nlmsg_alloc();
3437 if (!msg)
3438 return -ENOMEM;
3439
3440 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3441 0, NL80211_CMD_DEL_STATION, 0);
3442
3443 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3444 if_nametoindex(drv->ifname));
3445 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3446
3447 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3448 if (ret == -ENOENT)
3449 return 0;
3450 return ret;
3451 nla_put_failure:
3452 return -ENOBUFS;
3453 }
3454
3455
3456 static int i802_sta_set_flags(void *priv, const u8 *addr,
3457 int total_flags, int flags_or, int flags_and)
3458 {
3459 struct wpa_driver_nl80211_data *drv = priv;
3460 struct nl_msg *msg, *flags = NULL;
3461
3462 msg = nlmsg_alloc();
3463 if (!msg)
3464 return -ENOMEM;
3465
3466 flags = nlmsg_alloc();
3467 if (!flags) {
3468 nlmsg_free(msg);
3469 return -ENOMEM;
3470 }
3471
3472 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3473 0, NL80211_CMD_SET_STATION, 0);
3474
3475 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3476 if_nametoindex(drv->ifname));
3477 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3478
3479 if (total_flags & WLAN_STA_AUTHORIZED)
3480 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3481
3482 if (total_flags & WLAN_STA_WMM)
3483 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3484
3485 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3486 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3487
3488 if (total_flags & WLAN_STA_MFP)
3489 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3490
3491 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3492 goto nla_put_failure;
3493
3494 nlmsg_free(flags);
3495
3496 return send_and_recv_msgs(drv, msg, NULL, NULL);
3497 nla_put_failure:
3498 nlmsg_free(flags);
3499 return -ENOBUFS;
3500 }
3501
3502
3503 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3504 int cw_min, int cw_max, int burst_time)
3505 {
3506 struct wpa_driver_nl80211_data *drv = priv;
3507 struct nl_msg *msg;
3508 struct nlattr *txq, *params;
3509
3510 msg = nlmsg_alloc();
3511 if (!msg)
3512 return -1;
3513
3514 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3515 0, NL80211_CMD_SET_WIPHY, 0);
3516
3517 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3518
3519 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3520 if (!txq)
3521 goto nla_put_failure;
3522
3523 /* We are only sending parameters for a single TXQ at a time */
3524 params = nla_nest_start(msg, 1);
3525 if (!params)
3526 goto nla_put_failure;
3527
3528 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3529 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3530 * 32 usec, so need to convert the value here. */
3531 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3532 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3533 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3534 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3535
3536 nla_nest_end(msg, params);
3537
3538 nla_nest_end(msg, txq);
3539
3540 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3541 return 0;
3542 nla_put_failure:
3543 return -1;
3544 }
3545
3546
3547 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3548 {
3549 struct wpa_driver_nl80211_data *drv = priv;
3550 int ifidx;
3551 struct i802_bss *bss;
3552
3553 bss = os_zalloc(sizeof(*bss));
3554 if (bss == NULL)
3555 return -1;
3556 bss->ifindex = if_nametoindex(ifname);
3557
3558 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3559 if (ifidx < 0) {
3560 os_free(bss);
3561 return -1;
3562 }
3563 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3564 nl80211_remove_iface(priv, ifidx);
3565 os_free(bss);
3566 return -1;
3567 }
3568 bss->next = drv->bss.next;
3569 drv->bss.next = bss;
3570 return 0;
3571 }
3572
3573
3574 static int i802_bss_remove(void *priv, const char *ifname)
3575 {
3576 struct wpa_driver_nl80211_data *drv = priv;
3577 struct i802_bss *bss, *prev;
3578 int ifindex = if_nametoindex(ifname);
3579 nl80211_remove_iface(priv, ifindex);
3580 prev = &drv->bss;
3581 bss = drv->bss.next;
3582 while (bss) {
3583 if (ifindex == bss->ifindex) {
3584 prev->next = bss->next;
3585 os_free(bss);
3586 break;
3587 }
3588 prev = bss;
3589 bss = bss->next;
3590 }
3591 return 0;
3592 }
3593
3594
3595 static int i802_set_beacon(const char *iface, void *priv,
3596 const u8 *head, size_t head_len,
3597 const u8 *tail, size_t tail_len, int dtim_period)
3598 {
3599 return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3600 head, head_len,
3601 tail, tail_len,
3602 dtim_period);
3603 }
3604
3605
3606 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3607 {
3608 struct nl_msg *msg;
3609
3610 msg = nlmsg_alloc();
3611 if (!msg)
3612 return -ENOMEM;
3613
3614 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3615 0, NL80211_CMD_DEL_BEACON, 0);
3616 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3617
3618 return send_and_recv_msgs(drv, msg, NULL, NULL);
3619 nla_put_failure:
3620 return -ENOBUFS;
3621 }
3622
3623
3624 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3625 {
3626 struct wpa_driver_nl80211_data *drv = priv;
3627 struct nl_msg *msg;
3628
3629 msg = nlmsg_alloc();
3630 if (!msg)
3631 return -ENOMEM;
3632
3633 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3634 NL80211_CMD_SET_BSS, 0);
3635
3636 if (cts >= 0)
3637 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3638 if (preamble >= 0)
3639 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3640 if (slot >= 0)
3641 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3642
3643 /* TODO: multi-BSS support */
3644 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3645
3646 return send_and_recv_msgs(drv, msg, NULL, NULL);
3647 nla_put_failure:
3648 return -ENOBUFS;
3649 }
3650
3651
3652 static int i802_set_cts_protect(void *priv, int value)
3653 {
3654 return i802_set_bss(priv, value, -1, -1);
3655 }
3656
3657
3658 static int i802_set_preamble(void *priv, int value)
3659 {
3660 return i802_set_bss(priv, -1, value, -1);
3661 }
3662
3663
3664 static int i802_set_short_slot_time(void *priv, int value)
3665 {
3666 return i802_set_bss(priv, -1, -1, value);
3667 }
3668
3669
3670 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3671 {
3672 switch (type) {
3673 case HOSTAPD_IF_VLAN:
3674 return NL80211_IFTYPE_AP_VLAN;
3675 case HOSTAPD_IF_WDS:
3676 return NL80211_IFTYPE_WDS;
3677 }
3678 return -1;
3679 }
3680
3681
3682 static int i802_if_add(const char *iface, void *priv,
3683 enum hostapd_driver_if_type type, char *ifname,
3684 const u8 *addr)
3685 {
3686 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3687 return -1;
3688 return 0;
3689 }
3690
3691
3692 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3693 char *ifname, const u8 *addr)
3694 {
3695 /* unused at the moment */
3696 return -1;
3697 }
3698
3699
3700 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3701 const char *ifname, const u8 *addr)
3702 {
3703 nl80211_remove_iface(priv, if_nametoindex(ifname));
3704 return 0;
3705 }
3706
3707
3708 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3709 const char *ifname, int vlan_id)
3710 {
3711 struct wpa_driver_nl80211_data *drv = priv;
3712 struct nl_msg *msg;
3713
3714 msg = nlmsg_alloc();
3715 if (!msg)
3716 return -ENOMEM;
3717
3718 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3719 0, NL80211_CMD_SET_STATION, 0);
3720
3721 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3722 if_nametoindex(drv->ifname));
3723 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3724 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3725 if_nametoindex(ifname));
3726
3727 return send_and_recv_msgs(drv, msg, NULL, NULL);
3728 nla_put_failure:
3729 return -ENOBUFS;
3730 }
3731
3732
3733 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3734 {
3735 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3736 struct sockaddr_ll lladdr;
3737 unsigned char buf[3000];
3738 int len;
3739 socklen_t fromlen = sizeof(lladdr);
3740
3741 len = recvfrom(sock, buf, sizeof(buf), 0,
3742 (struct sockaddr *)&lladdr, &fromlen);
3743 if (len < 0) {
3744 perror("recv");
3745 return;
3746 }
3747
3748 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3749 struct hostapd_data *hapd;
3750 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3751 if (!hapd)
3752 return;
3753 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3754 }
3755 }
3756
3757
3758 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3759 int mode)
3760 {
3761 struct nl_msg *msg;
3762 int ret = -ENOBUFS;
3763
3764 msg = nlmsg_alloc();
3765 if (!msg)
3766 return -ENOMEM;
3767
3768 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3769 0, NL80211_CMD_SET_INTERFACE, 0);
3770 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3771 if_nametoindex(ifname));
3772 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3773
3774 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3775 if (!ret)
3776 return 0;
3777 nla_put_failure:
3778 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3779 "mode.", ifname);
3780 return ret;
3781 }
3782
3783
3784 #ifdef CONFIG_IEEE80211N
3785 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3786 int freq, u8 *ie, size_t ie_len)
3787 {
3788 struct ieee802_11_elems elems;
3789 int ht, pri_chan = 0, sec_chan = 0;
3790 struct ieee80211_ht_operation *oper;
3791 struct hostapd_neighbor_bss *nnei;
3792
3793 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3794 ht = elems.ht_capabilities || elems.ht_operation;
3795 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3796 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3797 pri_chan = oper->control_chan;
3798 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3799 if (oper->ht_param &
3800 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3801 sec_chan = pri_chan + 4;
3802 else if (oper->ht_param &
3803 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3804 sec_chan = pri_chan - 4;
3805 }
3806 }
3807
3808 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3809 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3810 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3811
3812 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3813 sizeof(struct hostapd_neighbor_bss));
3814 if (nnei == NULL)
3815 return;
3816 drv->neighbors = nnei;
3817 nnei = &nnei[drv->num_neighbors];
3818 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3819 nnei->freq = freq;
3820 nnei->ht = !!ht;
3821 nnei->pri_chan = pri_chan;
3822 nnei->sec_chan = sec_chan;
3823 drv->num_neighbors++;
3824 }
3825
3826
3827 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3828 {
3829 int divi = 1000000, i;
3830
3831 if (iwe->u.freq.e == 0) {
3832 /*
3833 * Some drivers do not report frequency, but a channel.
3834 * Try to map this to frequency by assuming they are using
3835 * IEEE 802.11b/g. But don't overwrite a previously parsed
3836 * frequency if the driver sends both frequency and channel,
3837 * since the driver may be sending an A-band channel that we
3838 * don't handle here.
3839 */
3840
3841 if (*freq)
3842 return 0;
3843
3844 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3845 *freq = 2407 + 5 * iwe->u.freq.m;
3846 return 0;
3847 } else if (iwe->u.freq.m == 14) {
3848 *freq = 2484;
3849 return 0;
3850 }
3851 }
3852
3853 if (iwe->u.freq.e > 6) {
3854 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3855 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3856 return -1;
3857 }
3858
3859 for (i = 0; i < iwe->u.freq.e; i++)
3860 divi /= 10;
3861 *freq = iwe->u.freq.m / divi;
3862 return 0;
3863 }
3864
3865
3866 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3867 size_t len)
3868 {
3869 size_t ap_num = 0;
3870 int first;
3871 struct iw_event iwe_buf, *iwe = &iwe_buf;
3872 char *pos, *end, *custom;
3873 u8 bssid[ETH_ALEN];
3874 int freq = 0;
3875 u8 *ie = NULL;
3876 size_t ie_len = 0;
3877
3878 ap_num = 0;
3879 first = 1;
3880
3881 pos = (char *) res_buf;
3882 end = (char *) res_buf + len;
3883
3884 while (pos + IW_EV_LCP_LEN <= end) {
3885 /* Event data may be unaligned, so make a local, aligned copy
3886 * before processing. */
3887 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3888 if (iwe->len <= IW_EV_LCP_LEN)
3889 break;
3890
3891 custom = pos + IW_EV_POINT_LEN;
3892 if (iwe->cmd == IWEVGENIE) {
3893 /* WE-19 removed the pointer from struct iw_point */
3894 char *dpos = (char *) &iwe_buf.u.data.length;
3895 int dlen = dpos - (char *) &iwe_buf;
3896 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3897 sizeof(struct iw_event) - dlen);
3898 } else {
3899 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3900 custom += IW_EV_POINT_OFF;
3901 }
3902
3903 switch (iwe->cmd) {
3904 case SIOCGIWAP:
3905 if (!first)
3906 i802_add_neighbor(drv, bssid, freq, ie,
3907 ie_len);
3908 first = 0;
3909 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3910 freq = 0;
3911 ie = NULL;
3912 ie_len = 0;
3913 break;
3914 case SIOCGIWFREQ:
3915 i802_get_scan_freq(iwe, &freq);
3916 break;
3917 case IWEVGENIE:
3918 if (custom + iwe->u.data.length > end) {
3919 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3920 return -1;
3921 }
3922 ie = (u8 *) custom;
3923 ie_len = iwe->u.data.length;
3924 break;
3925 }
3926
3927 pos += iwe->len;
3928 }
3929
3930 if (!first)
3931 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3932
3933 return 0;
3934 }
3935
3936
3937 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
3938 {
3939 struct iwreq iwr;
3940 u8 *res_buf;
3941 size_t res_buf_len;
3942 int res;
3943
3944 res_buf_len = IW_SCAN_MAX_DATA;
3945 for (;;) {
3946 res_buf = os_malloc(res_buf_len);
3947 if (res_buf == NULL)
3948 return -1;
3949 os_memset(&iwr, 0, sizeof(iwr));
3950 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3951 iwr.u.data.pointer = res_buf;
3952 iwr.u.data.length = res_buf_len;
3953
3954 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
3955 break;
3956
3957 if (errno == E2BIG && res_buf_len < 65535) {
3958 os_free(res_buf);
3959 res_buf = NULL;
3960 res_buf_len *= 2;
3961 if (res_buf_len > 65535)
3962 res_buf_len = 65535; /* 16-bit length field */
3963 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
3964 "trying larger buffer (%lu bytes)",
3965 (unsigned long) res_buf_len);
3966 } else {
3967 perror("ioctl[SIOCGIWSCAN]");
3968 os_free(res_buf);
3969 return -1;
3970 }
3971 }
3972
3973 if (iwr.u.data.length > res_buf_len) {
3974 os_free(res_buf);
3975 return -1;
3976 }
3977
3978 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
3979 os_free(res_buf);
3980
3981 return res;
3982 }
3983
3984
3985 static int i802_is_event_wireless_scan_complete(char *data, int len)
3986 {
3987 struct iw_event iwe_buf, *iwe = &iwe_buf;
3988 char *pos, *end;
3989
3990 pos = data;
3991 end = data + len;
3992
3993 while (pos + IW_EV_LCP_LEN <= end) {
3994 /* Event data may be unaligned, so make a local, aligned copy
3995 * before processing. */
3996 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3997 if (iwe->cmd == SIOCGIWSCAN)
3998 return 1;
3999
4000 pos += iwe->len;
4001 }
4002
4003 return 0;
4004 }
4005
4006
4007 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4008 {
4009 struct ifinfomsg *ifi;
4010 int attrlen, _nlmsg_len, rta_len;
4011 struct rtattr *attr;
4012
4013 if (len < (int) sizeof(*ifi))
4014 return 0;
4015
4016 ifi = NLMSG_DATA(h);
4017
4018 if (ifindex != ifi->ifi_index)
4019 return 0; /* event for foreign ifindex */
4020
4021 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4022
4023 attrlen = h->nlmsg_len - _nlmsg_len;
4024 if (attrlen < 0)
4025 return 0;
4026
4027 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4028
4029 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4030 while (RTA_OK(attr, attrlen)) {
4031 if (attr->rta_type == IFLA_WIRELESS &&
4032 i802_is_event_wireless_scan_complete(
4033 ((char *) attr) + rta_len,
4034 attr->rta_len - rta_len))
4035 return 1;
4036 attr = RTA_NEXT(attr, attrlen);
4037 }
4038
4039 return 0;
4040 }
4041
4042
4043 static int i802_is_scan_complete(int s, int ifindex)
4044 {
4045 char buf[1024];
4046 int left;
4047 struct nlmsghdr *h;
4048
4049 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4050 if (left < 0) {
4051 perror("recv(netlink)");
4052 return 0;
4053 }
4054
4055 h = (struct nlmsghdr *) buf;
4056 while (left >= (int) sizeof(*h)) {
4057 int len, plen;
4058
4059 len = h->nlmsg_len;
4060 plen = len - sizeof(*h);
4061 if (len > left || plen < 0) {
4062 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4063 "len=%d left=%d plen=%d",
4064 len, left, plen);
4065 break;
4066 }
4067
4068 switch (h->nlmsg_type) {
4069 case RTM_NEWLINK:
4070 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4071 return 1;
4072 break;
4073 }
4074
4075 len = NLMSG_ALIGN(len);
4076 left -= len;
4077 h = (struct nlmsghdr *) ((char *) h + len);
4078 }
4079
4080 return 0;
4081 }
4082
4083
4084 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4085 {
4086 struct iwreq iwr;
4087 int s, res, ifindex;
4088 struct sockaddr_nl local;
4089 time_t now, end;
4090 fd_set rfds;
4091 struct timeval tv;
4092
4093 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4094 "starting HT 20/40 MHz BSS");
4095
4096 /* Request a new scan */
4097 /* TODO: would be enough to scan the selected band */
4098 os_memset(&iwr, 0, sizeof(iwr));
4099 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4100 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4101 perror("ioctl[SIOCSIWSCAN]");
4102 return -1;
4103 }
4104
4105 ifindex = if_nametoindex(drv->ifname);
4106
4107 /* Wait for scan completion event or timeout */
4108 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4109 if (s < 0) {
4110 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4111 return -1;
4112 }
4113
4114 os_memset(&local, 0, sizeof(local));
4115 local.nl_family = AF_NETLINK;
4116 local.nl_groups = RTMGRP_LINK;
4117 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4118 perror("bind(netlink)");
4119 close(s);
4120 return -1;
4121 }
4122
4123 time(&end);
4124 end += 30; /* Wait at most 30 seconds for scan results */
4125 for (;;) {
4126 time(&now);
4127 tv.tv_sec = end > now ? end - now : 0;
4128 tv.tv_usec = 0;
4129 FD_ZERO(&rfds);
4130 FD_SET(s, &rfds);
4131 res = select(s + 1, &rfds, NULL, NULL, &tv);
4132 if (res < 0) {
4133 perror("select");
4134 /* Assume results are ready after 10 seconds wait */
4135 os_sleep(10, 0);
4136 break;
4137 } else if (res) {
4138 if (i802_is_scan_complete(s, ifindex)) {
4139 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4140 "completed");
4141 break;
4142 }
4143 } else {
4144 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4145 /* Assume results are ready to be read now */
4146 break;
4147 }
4148 }
4149
4150 close(s);
4151
4152 return i802_get_ht_scan_res(drv);
4153 }
4154 #endif /* CONFIG_IEEE80211N */
4155
4156
4157 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4158 {
4159 struct ifreq ifr;
4160
4161 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4162 if (drv->ioctl_sock < 0) {
4163 perror("socket[PF_INET,SOCK_DGRAM]");
4164 return -1;
4165 }
4166
4167 /* start listening for EAPOL on the default AP interface */
4168 add_ifidx(drv, if_nametoindex(drv->ifname));
4169
4170 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4171 return -1;
4172
4173 if (bssid) {
4174 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4175 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4176 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4177
4178 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4179 perror("ioctl(SIOCSIFHWADDR)");
4180 return -1;
4181 }
4182 }
4183
4184 if (wpa_driver_nl80211_init_nl(drv, drv->hapd))
4185 return -1;
4186
4187 #ifdef CONFIG_IEEE80211N
4188 if (drv->ht_40mhz_scan) {
4189 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4190 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4191 i802_ht_scan(drv) ||
4192 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4193 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4194 "HT 40 MHz operations");
4195 return -1;
4196 }
4197 }
4198 #endif /* CONFIG_IEEE80211N */
4199
4200 /* Initialise a monitor interface */
4201 if (nl80211_create_monitor_interface(drv))
4202 return -1;
4203
4204 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4205 goto fail1;
4206
4207 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4208 goto fail1;
4209
4210 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4211 if (drv->eapol_sock < 0) {
4212 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4213 goto fail1;
4214 }
4215
4216 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4217 {
4218 printf("Could not register read socket for eapol\n");
4219 return -1;
4220 }
4221
4222 memset(&ifr, 0, sizeof(ifr));
4223 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4224 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4225 perror("ioctl(SIOCGIFHWADDR)");
4226 goto fail1;
4227 }
4228
4229 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4230 printf("Invalid HW-addr family 0x%04x\n",
4231 ifr.ifr_hwaddr.sa_family);
4232 goto fail1;
4233 }
4234 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4235
4236 return 0;
4237
4238 fail1:
4239 nl80211_remove_iface(drv, drv->monitor_ifidx);
4240 return -1;
4241 }
4242
4243
4244 static int i802_get_inact_sec(void *priv, const u8 *addr)
4245 {
4246 struct hostap_sta_driver_data data;
4247 int ret;
4248
4249 data.inactive_msec = (unsigned long) -1;
4250 ret = i802_read_sta_data(priv, &data, addr);
4251 if (ret || data.inactive_msec == (unsigned long) -1)
4252 return -1;
4253 return data.inactive_msec / 1000;
4254 }
4255
4256
4257 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4258 {
4259 #if 0
4260 /* TODO */
4261 #endif
4262 return 0;
4263 }
4264
4265
4266 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4267 {
4268 struct wpa_driver_nl80211_data *drv = priv;
4269 struct ieee80211_mgmt mgmt;
4270
4271 memset(&mgmt, 0, sizeof(mgmt));
4272 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4273 WLAN_FC_STYPE_DEAUTH);
4274 memcpy(mgmt.da, addr, ETH_ALEN);
4275 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4276 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4277 mgmt.u.deauth.reason_code = host_to_le16(reason);
4278 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4279 IEEE80211_HDRLEN +
4280 sizeof(mgmt.u.deauth));
4281 }
4282
4283
4284 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4285 {
4286 struct wpa_driver_nl80211_data *drv = priv;
4287 struct ieee80211_mgmt mgmt;
4288
4289 memset(&mgmt, 0, sizeof(mgmt));
4290 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4291 WLAN_FC_STYPE_DISASSOC);
4292 memcpy(mgmt.da, addr, ETH_ALEN);
4293 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4294 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4295 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4296 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4297 IEEE80211_HDRLEN +
4298 sizeof(mgmt.u.disassoc));
4299 }
4300
4301
4302 static const struct hostapd_neighbor_bss *
4303 i802_get_neighbor_bss(void *priv, size_t *num)
4304 {
4305 struct wpa_driver_nl80211_data *drv = priv;
4306 *num = drv->num_neighbors;
4307 return drv->neighbors;
4308 }
4309
4310
4311 static void *i802_init(struct hostapd_data *hapd,
4312 struct wpa_init_params *params)
4313 {
4314 struct wpa_driver_nl80211_data *drv;
4315 size_t i;
4316
4317 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4318 if (drv == NULL) {
4319 printf("Could not allocate memory for i802 driver data\n");
4320 return NULL;
4321 }
4322
4323 drv->hapd = hapd;
4324 memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4325 drv->ifindex = if_nametoindex(drv->ifname);
4326 drv->bss.ifindex = drv->ifindex;
4327
4328 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4329 drv->if_indices = drv->default_if_indices;
4330 for (i = 0; i < params->num_bridge; i++) {
4331 if (params->bridge[i])
4332 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4333 }
4334 drv->ht_40mhz_scan = params->ht_40mhz_scan;
4335
4336 if (i802_init_sockets(drv, params->bssid))
4337 goto failed;
4338
4339 return drv;
4340
4341 failed:
4342 free(drv);
4343 return NULL;
4344 }
4345
4346
4347 static void i802_deinit(void *priv)
4348 {
4349 struct wpa_driver_nl80211_data *drv = priv;
4350 struct i802_bss *bss, *prev;
4351
4352 if (drv->last_freq_ht) {
4353 /* Clear HT flags from the driver */
4354 struct hostapd_freq_params freq;
4355 os_memset(&freq, 0, sizeof(freq));
4356 freq.freq = drv->last_freq;
4357 i802_set_freq(priv, &freq);
4358 }
4359
4360 i802_del_beacon(drv);
4361
4362 /* remove monitor interface */
4363 nl80211_remove_iface(drv, drv->monitor_ifidx);
4364
4365 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4366
4367 if (drv->monitor_sock >= 0) {
4368 eloop_unregister_read_sock(drv->monitor_sock);
4369 close(drv->monitor_sock);
4370 }
4371 if (drv->ioctl_sock >= 0)
4372 close(drv->ioctl_sock);
4373 if (drv->eapol_sock >= 0) {
4374 eloop_unregister_read_sock(drv->eapol_sock);
4375 close(drv->eapol_sock);
4376 }
4377
4378 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4379 genl_family_put(drv->nl80211);
4380 nl_cache_free(drv->nl_cache);
4381 nl_handle_destroy(drv->nl_handle);
4382 nl_cb_put(drv->nl_cb);
4383
4384 if (drv->if_indices != drv->default_if_indices)
4385 free(drv->if_indices);
4386
4387 os_free(drv->neighbors);
4388
4389 bss = drv->bss.next;
4390 while (bss) {
4391 prev = bss;
4392 bss = bss->next;
4393 os_free(bss);
4394 }
4395
4396 free(drv);
4397 }
4398
4399 #endif /* HOSTAPD */
4400
4401
4402 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4403 .name = "nl80211",
4404 .desc = "Linux nl80211/cfg80211",
4405 .get_bssid = wpa_driver_nl80211_get_bssid,
4406 .get_ssid = wpa_driver_nl80211_get_ssid,
4407 .set_key = wpa_driver_nl80211_set_key,
4408 .scan2 = wpa_driver_nl80211_scan,
4409 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4410 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4411 .disassociate = wpa_driver_nl80211_disassociate,
4412 .authenticate = wpa_driver_nl80211_authenticate,
4413 .associate = wpa_driver_nl80211_associate,
4414 .init = wpa_driver_nl80211_init,
4415 .deinit = wpa_driver_nl80211_deinit,
4416 .get_capa = wpa_driver_nl80211_get_capa,
4417 .set_operstate = wpa_driver_nl80211_set_operstate,
4418 .set_country = wpa_driver_nl80211_set_country,
4419 #ifdef CONFIG_AP
4420 .set_beacon = wpa_driver_nl80211_set_beacon,
4421 #endif /* CONFIG_AP */
4422 #if defined(CONFIG_AP) || defined(HOSTAPD)
4423 .send_mlme = wpa_driver_nl80211_send_mlme,
4424 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4425 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4426 #endif /* CONFIG_AP || HOSTAPD */
4427 #ifdef HOSTAPD
4428 .hapd_init = i802_init,
4429 .hapd_deinit = i802_deinit,
4430 .hapd_set_key = i802_set_key,
4431 .get_seqnum = i802_get_seqnum,
4432 .flush = i802_flush,
4433 .read_sta_data = i802_read_sta_data,
4434 .hapd_send_eapol = i802_send_eapol,
4435 .sta_set_flags = i802_sta_set_flags,
4436 .sta_deauth = i802_sta_deauth,
4437 .sta_disassoc = i802_sta_disassoc,
4438 .sta_remove = i802_sta_remove,
4439 .sta_add = i802_sta_add,
4440 .get_inact_sec = i802_get_inact_sec,
4441 .sta_clear_stats = i802_sta_clear_stats,
4442 .set_freq = i802_set_freq,
4443 .set_rts = i802_set_rts,
4444 .set_frag = i802_set_frag,
4445 .set_retry = i802_set_retry,
4446 .set_rate_sets = i802_set_rate_sets,
4447 .hapd_set_beacon = i802_set_beacon,
4448 .set_cts_protect = i802_set_cts_protect,
4449 .set_preamble = i802_set_preamble,
4450 .set_short_slot_time = i802_set_short_slot_time,
4451 .set_tx_queue_params = i802_set_tx_queue_params,
4452 .bss_add = i802_bss_add,
4453 .bss_remove = i802_bss_remove,
4454 .if_add = i802_if_add,
4455 .if_update = i802_if_update,
4456 .if_remove = i802_if_remove,
4457 .set_sta_vlan = i802_set_sta_vlan,
4458 .get_neighbor_bss = i802_get_neighbor_bss,
4459 #endif /* HOSTAPD */
4460 };
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