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Merge hostapd driver init functions into one
[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 <netlink/msg.h>
52 #include <netlink/attr.h>
53 #include <net/if.h>
54 #include <net/if_arp.h>
55
56 #include "../../hostapd/hostapd.h"
57 #include "../../hostapd/sta_flags.h"
58 #include "ieee802_11_common.h"
59
60 #ifdef CONFIG_LIBNL20
61 /* libnl 2.0 compatibility code */
62 #define nl_handle_alloc_cb nl_socket_alloc_cb
63 #define nl_handle_destroy nl_socket_free
64 #endif /* CONFIG_LIBNL20 */
65
66 #endif /* HOSTAPD */
67
68
69 #ifndef IFF_LOWER_UP
70 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
71 #endif
72 #ifndef IFF_DORMANT
73 #define IFF_DORMANT 0x20000 /* driver signals dormant */
74 #endif
75
76 #ifndef IF_OPER_DORMANT
77 #define IF_OPER_DORMANT 5
78 #endif
79 #ifndef IF_OPER_UP
80 #define IF_OPER_UP 6
81 #endif
82
83 enum ieee80211_msg_type {
84 ieee80211_msg_normal = 0,
85 ieee80211_msg_tx_callback_ack = 1,
86 ieee80211_msg_tx_callback_fail = 2,
87 };
88
89 struct i802_bss {
90 struct i802_bss *next;
91 char ifname[IFNAMSIZ + 1];
92 unsigned int beacon_set:1;
93 };
94
95 struct wpa_driver_nl80211_data {
96 void *ctx;
97 int link_event_sock;
98 int ioctl_sock; /* socket for ioctl() use */
99 char ifname[IFNAMSIZ + 1];
100 int ifindex;
101 int if_removed;
102 struct wpa_driver_capa capa;
103 int has_capability;
104
105 int operstate;
106
107 int scan_complete_events;
108
109 struct nl_handle *nl_handle;
110 struct nl_cache *nl_cache;
111 struct nl_cb *nl_cb;
112 struct genl_family *nl80211;
113
114 u8 bssid[ETH_ALEN];
115 int associated;
116 u8 ssid[32];
117 size_t ssid_len;
118
119 #ifdef CONFIG_AP
120 int beacon_int;
121 unsigned int beacon_set:1;
122 int monitor_sock;
123 int monitor_ifidx;
124 #endif /* CONFIG_AP */
125
126 #ifdef HOSTAPD
127 struct hostapd_data *hapd;
128
129 int eapol_sock; /* socket for EAPOL frames */
130 int monitor_sock; /* socket for monitor */
131 int monitor_ifidx;
132
133 int default_if_indices[16];
134 int *if_indices;
135 int num_if_indices;
136
137 int beacon_int;
138 struct i802_bss bss;
139 unsigned int ht_40mhz_scan:1;
140
141 int last_freq;
142 int last_freq_ht;
143 struct hostapd_neighbor_bss *neighbors;
144 size_t num_neighbors;
145 #endif /* HOSTAPD */
146 };
147
148
149 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
150 void *timeout_ctx);
151 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
152 int mode);
153 static int
154 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
155
156 #ifdef CONFIG_AP
157 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
158 int ifidx);
159 #endif /* CONFIG_AP */
160
161 #ifdef HOSTAPD
162 static void handle_frame(struct wpa_driver_nl80211_data *drv,
163 u8 *buf, size_t len,
164 struct hostapd_frame_info *hfi,
165 enum ieee80211_msg_type msg_type);
166 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
167 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
168 #endif /* HOSTAPD */
169
170
171 /* nl80211 code */
172 static int ack_handler(struct nl_msg *msg, void *arg)
173 {
174 int *err = arg;
175 *err = 0;
176 return NL_STOP;
177 }
178
179 static int finish_handler(struct nl_msg *msg, void *arg)
180 {
181 int *ret = arg;
182 *ret = 0;
183 return NL_SKIP;
184 }
185
186 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
187 void *arg)
188 {
189 int *ret = arg;
190 *ret = err->error;
191 return NL_SKIP;
192 }
193
194
195 static int no_seq_check(struct nl_msg *msg, void *arg)
196 {
197 return NL_OK;
198 }
199
200
201 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
202 struct nl_msg *msg,
203 int (*valid_handler)(struct nl_msg *, void *),
204 void *valid_data)
205 {
206 struct nl_cb *cb;
207 int err = -ENOMEM;
208
209 cb = nl_cb_clone(drv->nl_cb);
210 if (!cb)
211 goto out;
212
213 err = nl_send_auto_complete(drv->nl_handle, msg);
214 if (err < 0)
215 goto out;
216
217 err = 1;
218
219 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
220 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
221 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
222
223 if (valid_handler)
224 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
225 valid_handler, valid_data);
226
227 while (err > 0)
228 nl_recvmsgs(drv->nl_handle, cb);
229 out:
230 nl_cb_put(cb);
231 nlmsg_free(msg);
232 return err;
233 }
234
235
236 struct family_data {
237 const char *group;
238 int id;
239 };
240
241
242 static int family_handler(struct nl_msg *msg, void *arg)
243 {
244 struct family_data *res = arg;
245 struct nlattr *tb[CTRL_ATTR_MAX + 1];
246 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
247 struct nlattr *mcgrp;
248 int i;
249
250 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
251 genlmsg_attrlen(gnlh, 0), NULL);
252 if (!tb[CTRL_ATTR_MCAST_GROUPS])
253 return NL_SKIP;
254
255 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
256 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
257 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
258 nla_len(mcgrp), NULL);
259 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
260 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
261 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
262 res->group,
263 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
264 continue;
265 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
266 break;
267 };
268
269 return NL_SKIP;
270 }
271
272
273 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
274 const char *family, const char *group)
275 {
276 struct nl_msg *msg;
277 int ret = -1;
278 struct family_data res = { group, -ENOENT };
279
280 msg = nlmsg_alloc();
281 if (!msg)
282 return -ENOMEM;
283 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
284 0, 0, CTRL_CMD_GETFAMILY, 0);
285 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
286
287 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
288 msg = NULL;
289 if (ret == 0)
290 ret = res.id;
291
292 nla_put_failure:
293 nlmsg_free(msg);
294 return ret;
295 }
296
297
298 static int wpa_driver_nl80211_send_oper_ifla(
299 struct wpa_driver_nl80211_data *drv,
300 int linkmode, int operstate)
301 {
302 struct {
303 struct nlmsghdr hdr;
304 struct ifinfomsg ifinfo;
305 char opts[16];
306 } req;
307 struct rtattr *rta;
308 static int nl_seq;
309 ssize_t ret;
310
311 os_memset(&req, 0, sizeof(req));
312
313 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
314 req.hdr.nlmsg_type = RTM_SETLINK;
315 req.hdr.nlmsg_flags = NLM_F_REQUEST;
316 req.hdr.nlmsg_seq = ++nl_seq;
317 req.hdr.nlmsg_pid = 0;
318
319 req.ifinfo.ifi_family = AF_UNSPEC;
320 req.ifinfo.ifi_type = 0;
321 req.ifinfo.ifi_index = drv->ifindex;
322 req.ifinfo.ifi_flags = 0;
323 req.ifinfo.ifi_change = 0;
324
325 if (linkmode != -1) {
326 rta = (struct rtattr *)
327 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
328 rta->rta_type = IFLA_LINKMODE;
329 rta->rta_len = RTA_LENGTH(sizeof(char));
330 *((char *) RTA_DATA(rta)) = linkmode;
331 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
332 RTA_LENGTH(sizeof(char));
333 }
334 if (operstate != -1) {
335 rta = (struct rtattr *)
336 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
337 rta->rta_type = IFLA_OPERSTATE;
338 rta->rta_len = RTA_LENGTH(sizeof(char));
339 *((char *) RTA_DATA(rta)) = operstate;
340 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
341 RTA_LENGTH(sizeof(char));
342 }
343
344 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
345 linkmode, operstate);
346
347 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
348 if (ret < 0) {
349 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
350 "%s (assume operstate is not supported)",
351 strerror(errno));
352 }
353
354 return ret < 0 ? -1 : 0;
355 }
356
357
358 static int wpa_driver_nl80211_set_auth_param(
359 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
360 {
361 struct iwreq iwr;
362 int ret = 0;
363
364 os_memset(&iwr, 0, sizeof(iwr));
365 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
366 iwr.u.param.flags = idx & IW_AUTH_INDEX;
367 iwr.u.param.value = value;
368
369 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
370 if (errno != EOPNOTSUPP) {
371 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
372 "value 0x%x) failed: %s)",
373 idx, value, strerror(errno));
374 }
375 ret = errno == EOPNOTSUPP ? -2 : -1;
376 }
377
378 return ret;
379 }
380
381
382 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
383 {
384 struct wpa_driver_nl80211_data *drv = priv;
385 if (!drv->associated)
386 return -1;
387 os_memcpy(bssid, drv->bssid, ETH_ALEN);
388 return 0;
389 }
390
391
392 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
393 {
394 struct wpa_driver_nl80211_data *drv = priv;
395 if (!drv->associated)
396 return -1;
397 os_memcpy(ssid, drv->ssid, drv->ssid_len);
398 return drv->ssid_len;
399 }
400
401
402 #ifndef HOSTAPD
403 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
404 void *ctx, char *buf, size_t len,
405 int del)
406 {
407 union wpa_event_data event;
408
409 os_memset(&event, 0, sizeof(event));
410 if (len > sizeof(event.interface_status.ifname))
411 len = sizeof(event.interface_status.ifname) - 1;
412 os_memcpy(event.interface_status.ifname, buf, len);
413 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
414 EVENT_INTERFACE_ADDED;
415
416 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
417 del ? "DEL" : "NEW",
418 event.interface_status.ifname,
419 del ? "removed" : "added");
420
421 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
422 if (del)
423 drv->if_removed = 1;
424 else
425 drv->if_removed = 0;
426 }
427
428 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
429 }
430
431
432 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
433 struct nlmsghdr *h)
434 {
435 struct ifinfomsg *ifi;
436 int attrlen, _nlmsg_len, rta_len;
437 struct rtattr *attr;
438
439 ifi = NLMSG_DATA(h);
440
441 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
442
443 attrlen = h->nlmsg_len - _nlmsg_len;
444 if (attrlen < 0)
445 return 0;
446
447 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
448
449 rta_len = RTA_ALIGN(sizeof(struct rtattr));
450 while (RTA_OK(attr, attrlen)) {
451 if (attr->rta_type == IFLA_IFNAME) {
452 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
453 == 0)
454 return 1;
455 else
456 break;
457 }
458 attr = RTA_NEXT(attr, attrlen);
459 }
460
461 return 0;
462 }
463
464
465 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
466 int ifindex, struct nlmsghdr *h)
467 {
468 if (drv->ifindex == ifindex)
469 return 1;
470
471 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
472 drv->ifindex = if_nametoindex(drv->ifname);
473 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
474 "interface");
475 wpa_driver_nl80211_finish_drv_init(drv);
476 return 1;
477 }
478
479 return 0;
480 }
481
482
483 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
484 void *ctx, struct nlmsghdr *h,
485 size_t len)
486 {
487 struct ifinfomsg *ifi;
488 int attrlen, _nlmsg_len, rta_len;
489 struct rtattr * attr;
490
491 if (len < sizeof(*ifi))
492 return;
493
494 ifi = NLMSG_DATA(h);
495
496 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
497 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
498 ifi->ifi_index);
499 return;
500 }
501
502 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
503 "(%s%s%s%s)",
504 drv->operstate, ifi->ifi_flags,
505 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
506 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
507 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
508 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
509 /*
510 * Some drivers send the association event before the operup event--in
511 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
512 * fails. This will hit us when wpa_supplicant does not need to do
513 * IEEE 802.1X authentication
514 */
515 if (drv->operstate == 1 &&
516 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
517 !(ifi->ifi_flags & IFF_RUNNING))
518 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
519
520 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
521
522 attrlen = h->nlmsg_len - _nlmsg_len;
523 if (attrlen < 0)
524 return;
525
526 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
527
528 rta_len = RTA_ALIGN(sizeof(struct rtattr));
529 while (RTA_OK(attr, attrlen)) {
530 if (attr->rta_type == IFLA_IFNAME) {
531 wpa_driver_nl80211_event_link(
532 drv, ctx,
533 ((char *) attr) + rta_len,
534 attr->rta_len - rta_len, 0);
535 }
536 attr = RTA_NEXT(attr, attrlen);
537 }
538 }
539
540
541 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
542 void *ctx, struct nlmsghdr *h,
543 size_t len)
544 {
545 struct ifinfomsg *ifi;
546 int attrlen, _nlmsg_len, rta_len;
547 struct rtattr * attr;
548
549 if (len < sizeof(*ifi))
550 return;
551
552 ifi = NLMSG_DATA(h);
553
554 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
555
556 attrlen = h->nlmsg_len - _nlmsg_len;
557 if (attrlen < 0)
558 return;
559
560 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
561
562 rta_len = RTA_ALIGN(sizeof(struct rtattr));
563 while (RTA_OK(attr, attrlen)) {
564 if (attr->rta_type == IFLA_IFNAME) {
565 wpa_driver_nl80211_event_link(
566 drv, ctx,
567 ((char *) attr) + rta_len,
568 attr->rta_len - rta_len, 1);
569 }
570 attr = RTA_NEXT(attr, attrlen);
571 }
572 }
573
574
575 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
576 void *sock_ctx)
577 {
578 char buf[8192];
579 int left;
580 struct sockaddr_nl from;
581 socklen_t fromlen;
582 struct nlmsghdr *h;
583 int max_events = 10;
584
585 try_again:
586 fromlen = sizeof(from);
587 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
588 (struct sockaddr *) &from, &fromlen);
589 if (left < 0) {
590 if (errno != EINTR && errno != EAGAIN)
591 perror("recvfrom(netlink)");
592 return;
593 }
594
595 h = (struct nlmsghdr *) buf;
596 while (left >= (int) sizeof(*h)) {
597 int len, plen;
598
599 len = h->nlmsg_len;
600 plen = len - sizeof(*h);
601 if (len > left || plen < 0) {
602 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
603 "len=%d left=%d plen=%d",
604 len, left, plen);
605 break;
606 }
607
608 switch (h->nlmsg_type) {
609 case RTM_NEWLINK:
610 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
611 h, plen);
612 break;
613 case RTM_DELLINK:
614 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
615 h, plen);
616 break;
617 }
618
619 len = NLMSG_ALIGN(len);
620 left -= len;
621 h = (struct nlmsghdr *) ((char *) h + len);
622 }
623
624 if (left > 0) {
625 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
626 "message", left);
627 }
628
629 if (--max_events > 0) {
630 /*
631 * Try to receive all events in one eloop call in order to
632 * limit race condition on cases where AssocInfo event, Assoc
633 * event, and EAPOL frames are received more or less at the
634 * same time. We want to process the event messages first
635 * before starting EAPOL processing.
636 */
637 goto try_again;
638 }
639 }
640
641
642 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
643 const u8 *frame, size_t len)
644 {
645 const struct ieee80211_mgmt *mgmt;
646 union wpa_event_data event;
647
648 mgmt = (const struct ieee80211_mgmt *) frame;
649 if (len < 24 + sizeof(mgmt->u.auth)) {
650 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
651 "frame");
652 return;
653 }
654
655 os_memset(&event, 0, sizeof(event));
656 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
657 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
658 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
659 if (len > 24 + sizeof(mgmt->u.auth)) {
660 event.auth.ies = mgmt->u.auth.variable;
661 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
662 }
663
664 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
665 }
666
667
668 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
669 const u8 *frame, size_t len)
670 {
671 const struct ieee80211_mgmt *mgmt;
672 union wpa_event_data event;
673 u16 status;
674
675 mgmt = (const struct ieee80211_mgmt *) frame;
676 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
677 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
678 "frame");
679 return;
680 }
681
682 status = le_to_host16(mgmt->u.assoc_resp.status_code);
683 if (status != WLAN_STATUS_SUCCESS) {
684 os_memset(&event, 0, sizeof(event));
685 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
686 event.assoc_reject.resp_ies =
687 (u8 *) mgmt->u.assoc_resp.variable;
688 event.assoc_reject.resp_ies_len =
689 len - 24 - sizeof(mgmt->u.assoc_resp);
690 }
691 event.assoc_reject.status_code = status;
692
693 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
694 return;
695 }
696
697 drv->associated = 1;
698 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
699
700 os_memset(&event, 0, sizeof(event));
701 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
702 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
703 event.assoc_info.resp_ies_len =
704 len - 24 - sizeof(mgmt->u.assoc_resp);
705 }
706
707 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
708 }
709
710
711 static void mlme_event(struct wpa_driver_nl80211_data *drv,
712 enum nl80211_commands cmd, struct nlattr *frame)
713 {
714 if (frame == NULL) {
715 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
716 "data", cmd);
717 return;
718 }
719
720 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
721 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
722 nla_data(frame), nla_len(frame));
723
724 switch (cmd) {
725 case NL80211_CMD_AUTHENTICATE:
726 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
727 break;
728 case NL80211_CMD_ASSOCIATE:
729 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
730 break;
731 case NL80211_CMD_DEAUTHENTICATE:
732 drv->associated = 0;
733 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
734 break;
735 case NL80211_CMD_DISASSOCIATE:
736 drv->associated = 0;
737 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
738 break;
739 default:
740 break;
741 }
742 }
743
744 #endif /* HOSTAPD */
745
746
747 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
748 struct nlattr *tb[])
749 {
750 #ifdef HOSTAPD
751 if (tb[NL80211_ATTR_MAC])
752 hostapd_michael_mic_failure(drv->hapd,
753 nla_data(tb[NL80211_ATTR_MAC]));
754 #else /* HOSTAPD */
755 union wpa_event_data data;
756
757 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
758 os_memset(&data, 0, sizeof(data));
759 if (tb[NL80211_ATTR_MAC]) {
760 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
761 nla_data(tb[NL80211_ATTR_MAC]),
762 nla_len(tb[NL80211_ATTR_MAC]));
763 }
764 if (tb[NL80211_ATTR_KEY_SEQ]) {
765 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
766 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
767 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
768 }
769 if (tb[NL80211_ATTR_KEY_TYPE]) {
770 enum nl80211_key_type key_type =
771 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
772 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
773 if (key_type == NL80211_KEYTYPE_PAIRWISE)
774 data.michael_mic_failure.unicast = 1;
775 } else
776 data.michael_mic_failure.unicast = 1;
777
778 if (tb[NL80211_ATTR_KEY_IDX]) {
779 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
780 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
781 }
782
783 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
784 #endif /* HOSTAPD */
785 }
786
787
788 static int process_event(struct nl_msg *msg, void *arg)
789 {
790 struct wpa_driver_nl80211_data *drv = arg;
791 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
792 struct nlattr *tb[NL80211_ATTR_MAX + 1];
793
794 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
795 genlmsg_attrlen(gnlh, 0), NULL);
796
797 if (tb[NL80211_ATTR_IFINDEX]) {
798 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
799 if (ifindex != drv->ifindex) {
800 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
801 " for foreign interface (ifindex %d)",
802 gnlh->cmd, ifindex);
803 return NL_SKIP;
804 }
805 }
806
807 switch (gnlh->cmd) {
808 #ifndef HOSTAPD
809 case NL80211_CMD_NEW_SCAN_RESULTS:
810 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
811 drv->scan_complete_events = 1;
812 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
813 drv->ctx);
814 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
815 break;
816 case NL80211_CMD_SCAN_ABORTED:
817 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
818 /*
819 * Need to indicate that scan results are available in order
820 * not to make wpa_supplicant stop its scanning.
821 */
822 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
823 drv->ctx);
824 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
825 break;
826 case NL80211_CMD_AUTHENTICATE:
827 case NL80211_CMD_ASSOCIATE:
828 case NL80211_CMD_DEAUTHENTICATE:
829 case NL80211_CMD_DISASSOCIATE:
830 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
831 break;
832 #endif /* HOSTAPD */
833 case NL80211_CMD_MICHAEL_MIC_FAILURE:
834 mlme_event_michael_mic_failure(drv, tb);
835 break;
836 default:
837 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
838 "(cmd=%d)", gnlh->cmd);
839 break;
840 }
841
842 return NL_SKIP;
843 }
844
845
846 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
847 void *sock_ctx)
848 {
849 struct nl_cb *cb;
850 struct wpa_driver_nl80211_data *drv = eloop_ctx;
851
852 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
853
854 cb = nl_cb_clone(drv->nl_cb);
855 if (!cb)
856 return;
857 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
858 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
859 nl_recvmsgs(drv->nl_handle, cb);
860 nl_cb_put(cb);
861 }
862
863
864 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
865 const char *ifname, int dev_up)
866 {
867 struct ifreq ifr;
868
869 if (drv->ioctl_sock < 0)
870 return -1;
871
872 os_memset(&ifr, 0, sizeof(ifr));
873 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
874
875 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
876 perror("ioctl[SIOCGIFFLAGS]");
877 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
878 ifname);
879 return -1;
880 }
881
882 if (dev_up) {
883 if (ifr.ifr_flags & IFF_UP)
884 return 0;
885 ifr.ifr_flags |= IFF_UP;
886 } else {
887 if (!(ifr.ifr_flags & IFF_UP))
888 return 0;
889 ifr.ifr_flags &= ~IFF_UP;
890 }
891
892 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
893 perror("ioctl[SIOCSIFFLAGS]");
894 return -1;
895 }
896
897 return 0;
898 }
899
900
901 /**
902 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
903 * @priv: driver_nl80211 private data
904 * @alpha2_arg: country to which to switch to
905 * Returns: 0 on success, -1 on failure
906 *
907 * This asks nl80211 to set the regulatory domain for given
908 * country ISO / IEC alpha2.
909 */
910 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
911 {
912 struct wpa_driver_nl80211_data *drv = priv;
913 char alpha2[3];
914 struct nl_msg *msg;
915
916 msg = nlmsg_alloc();
917 if (!msg)
918 return -ENOMEM;
919
920 alpha2[0] = alpha2_arg[0];
921 alpha2[1] = alpha2_arg[1];
922 alpha2[2] = '\0';
923
924 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
925 0, NL80211_CMD_REQ_SET_REG, 0);
926
927 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
928 if (send_and_recv_msgs(drv, msg, NULL, NULL))
929 return -EINVAL;
930 return 0;
931 nla_put_failure:
932 return -EINVAL;
933 }
934
935
936 struct wiphy_info_data {
937 int max_scan_ssids;
938 int ap_supported;
939 };
940
941
942 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
943 {
944 struct nlattr *tb[NL80211_ATTR_MAX + 1];
945 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
946 struct wiphy_info_data *info = arg;
947
948 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
949 genlmsg_attrlen(gnlh, 0), NULL);
950
951 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
952 info->max_scan_ssids =
953 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
954
955 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
956 struct nlattr *nl_mode;
957 int i;
958 nla_for_each_nested(nl_mode,
959 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
960 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
961 info->ap_supported = 1;
962 break;
963 }
964 }
965 }
966
967 return NL_SKIP;
968 }
969
970
971 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
972 struct wiphy_info_data *info)
973 {
974 struct nl_msg *msg;
975
976 os_memset(info, 0, sizeof(*info));
977 msg = nlmsg_alloc();
978 if (!msg)
979 return -1;
980
981 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
982 0, NL80211_CMD_GET_WIPHY, 0);
983
984 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
985
986 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
987 return 0;
988 msg = NULL;
989 nla_put_failure:
990 nlmsg_free(msg);
991 return -1;
992 }
993
994
995 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
996 {
997 struct wiphy_info_data info;
998 if (wpa_driver_nl80211_get_info(drv, &info))
999 return;
1000 drv->has_capability = 1;
1001 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1002 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1003 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1004 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1005 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1006 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1007 WPA_DRIVER_CAPA_ENC_WEP104 |
1008 WPA_DRIVER_CAPA_ENC_TKIP |
1009 WPA_DRIVER_CAPA_ENC_CCMP;
1010
1011 drv->capa.max_scan_ssids = info.max_scan_ssids;
1012 if (info.ap_supported)
1013 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1014 }
1015
1016
1017 /**
1018 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1019 * @ctx: context to be used when calling wpa_supplicant functions,
1020 * e.g., wpa_supplicant_event()
1021 * @ifname: interface name, e.g., wlan0
1022 * Returns: Pointer to private data, %NULL on failure
1023 */
1024 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1025 {
1026 int s, ret;
1027 struct sockaddr_nl local;
1028 struct wpa_driver_nl80211_data *drv;
1029
1030 drv = os_zalloc(sizeof(*drv));
1031 if (drv == NULL)
1032 return NULL;
1033 drv->ctx = ctx;
1034 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1035 #ifdef CONFIG_AP
1036 drv->monitor_ifidx = -1;
1037 drv->monitor_sock = -1;
1038 #endif /* CONFIG_AP */
1039
1040 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1041 if (drv->nl_cb == NULL) {
1042 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1043 "callbacks");
1044 goto err1;
1045 }
1046
1047 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1048 if (drv->nl_handle == NULL) {
1049 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1050 "callbacks");
1051 goto err2;
1052 }
1053
1054 if (genl_connect(drv->nl_handle)) {
1055 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1056 "netlink");
1057 goto err3;
1058 }
1059
1060 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1061 if (drv->nl_cache == NULL) {
1062 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1063 "netlink cache");
1064 goto err3;
1065 }
1066
1067 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1068 if (drv->nl80211 == NULL) {
1069 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1070 "found");
1071 goto err4;
1072 }
1073
1074 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1075 if (ret >= 0)
1076 ret = nl_socket_add_membership(drv->nl_handle, ret);
1077 if (ret < 0) {
1078 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1079 "membership for scan events: %d (%s)",
1080 ret, strerror(-ret));
1081 goto err4;
1082 }
1083
1084 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1085 if (ret >= 0)
1086 ret = nl_socket_add_membership(drv->nl_handle, ret);
1087 if (ret < 0) {
1088 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1089 "membership for mlme events: %d (%s)",
1090 ret, strerror(-ret));
1091 goto err4;
1092 }
1093 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1094
1095 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1096 wpa_driver_nl80211_event_receive, drv, ctx);
1097
1098 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1099 if (drv->ioctl_sock < 0) {
1100 perror("socket(PF_INET,SOCK_DGRAM)");
1101 goto err5;
1102 }
1103
1104 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1105 if (s < 0) {
1106 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1107 goto err6;
1108 }
1109
1110 os_memset(&local, 0, sizeof(local));
1111 local.nl_family = AF_NETLINK;
1112 local.nl_groups = RTMGRP_LINK;
1113 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1114 perror("bind(netlink)");
1115 close(s);
1116 goto err6;
1117 }
1118
1119 #ifndef HOSTAPD
1120 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1121 ctx);
1122 #endif /* HOSTAPD */
1123 drv->link_event_sock = s;
1124
1125 if (wpa_driver_nl80211_finish_drv_init(drv))
1126 goto err7;
1127
1128 return drv;
1129
1130 err7:
1131 eloop_unregister_read_sock(drv->link_event_sock);
1132 close(drv->link_event_sock);
1133 err6:
1134 close(drv->ioctl_sock);
1135 err5:
1136 genl_family_put(drv->nl80211);
1137 err4:
1138 nl_cache_free(drv->nl_cache);
1139 err3:
1140 nl_handle_destroy(drv->nl_handle);
1141 err2:
1142 nl_cb_put(drv->nl_cb);
1143 err1:
1144 os_free(drv);
1145 return NULL;
1146 }
1147
1148
1149 static int
1150 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1151 {
1152 drv->ifindex = if_nametoindex(drv->ifname);
1153
1154 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1155 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1156 "use managed mode");
1157 }
1158
1159 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1160 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1161 "UP", drv->ifname);
1162 return -1;
1163 }
1164
1165 wpa_driver_nl80211_capa(drv);
1166
1167 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1168
1169 return 0;
1170 }
1171
1172
1173 /**
1174 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1175 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1176 *
1177 * Shut down driver interface and processing of driver events. Free
1178 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1179 */
1180 static void wpa_driver_nl80211_deinit(void *priv)
1181 {
1182 struct wpa_driver_nl80211_data *drv = priv;
1183
1184 #ifdef CONFIG_AP
1185 if (drv->monitor_ifidx >= 0)
1186 nl80211_remove_iface(drv, drv->monitor_ifidx);
1187 if (drv->monitor_sock >= 0) {
1188 eloop_unregister_read_sock(drv->monitor_sock);
1189 close(drv->monitor_sock);
1190 }
1191 #endif /* CONFIG_AP */
1192
1193 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1194
1195 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1196
1197 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1198
1199 eloop_unregister_read_sock(drv->link_event_sock);
1200
1201 hostapd_set_iface_flags(drv, drv->ifname, 0);
1202 wpa_driver_nl80211_set_mode(drv, 0);
1203
1204 close(drv->link_event_sock);
1205 close(drv->ioctl_sock);
1206
1207 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1208 genl_family_put(drv->nl80211);
1209 nl_cache_free(drv->nl_cache);
1210 nl_handle_destroy(drv->nl_handle);
1211 nl_cb_put(drv->nl_cb);
1212
1213 os_free(drv);
1214 }
1215
1216
1217 /**
1218 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1219 * @eloop_ctx: Unused
1220 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1221 *
1222 * This function can be used as registered timeout when starting a scan to
1223 * generate a scan completed event if the driver does not report this.
1224 */
1225 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1226 {
1227 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1228 #ifndef HOSTAPD
1229 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1230 #endif /* HOSTAPD */
1231 }
1232
1233
1234 /**
1235 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1236 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1237 * @params: Scan parameters
1238 * Returns: 0 on success, -1 on failure
1239 */
1240 static int wpa_driver_nl80211_scan(void *priv,
1241 struct wpa_driver_scan_params *params)
1242 {
1243 struct wpa_driver_nl80211_data *drv = priv;
1244 int ret = 0, timeout;
1245 struct nl_msg *msg, *ssids, *freqs;
1246 size_t i;
1247
1248 msg = nlmsg_alloc();
1249 ssids = nlmsg_alloc();
1250 freqs = nlmsg_alloc();
1251 if (!msg || !ssids || !freqs) {
1252 nlmsg_free(msg);
1253 nlmsg_free(ssids);
1254 nlmsg_free(freqs);
1255 return -1;
1256 }
1257
1258 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1259 NL80211_CMD_TRIGGER_SCAN, 0);
1260
1261 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1262
1263 for (i = 0; i < params->num_ssids; i++) {
1264 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1265 params->ssids[i].ssid);
1266 }
1267 if (params->num_ssids)
1268 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1269
1270 if (params->extra_ies) {
1271 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1272 params->extra_ies);
1273 }
1274
1275 if (params->freqs) {
1276 for (i = 0; params->freqs[i]; i++)
1277 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1278 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1279 }
1280
1281 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1282 msg = NULL;
1283 if (ret) {
1284 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1285 "(%s)", ret, strerror(-ret));
1286 goto nla_put_failure;
1287 }
1288
1289 /* Not all drivers generate "scan completed" wireless event, so try to
1290 * read results after a timeout. */
1291 timeout = 10;
1292 if (drv->scan_complete_events) {
1293 /*
1294 * The driver seems to deliver events to notify when scan is
1295 * complete, so use longer timeout to avoid race conditions
1296 * with scanning and following association request.
1297 */
1298 timeout = 30;
1299 }
1300 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1301 "seconds", ret, timeout);
1302 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1303 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1304 drv, drv->ctx);
1305
1306 nla_put_failure:
1307 nlmsg_free(ssids);
1308 nlmsg_free(msg);
1309 nlmsg_free(freqs);
1310 return ret;
1311 }
1312
1313
1314 static int bss_info_handler(struct nl_msg *msg, void *arg)
1315 {
1316 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1317 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1318 struct nlattr *bss[NL80211_BSS_MAX + 1];
1319 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1320 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1321 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1322 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1323 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1324 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1325 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1326 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1327 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1328 };
1329 struct wpa_scan_results *res = arg;
1330 struct wpa_scan_res **tmp;
1331 struct wpa_scan_res *r;
1332 const u8 *ie;
1333 size_t ie_len;
1334
1335 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1336 genlmsg_attrlen(gnlh, 0), NULL);
1337 if (!tb[NL80211_ATTR_BSS])
1338 return NL_SKIP;
1339 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1340 bss_policy))
1341 return NL_SKIP;
1342 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1343 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1344 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1345 } else {
1346 ie = NULL;
1347 ie_len = 0;
1348 }
1349
1350 r = os_zalloc(sizeof(*r) + ie_len);
1351 if (r == NULL)
1352 return NL_SKIP;
1353 if (bss[NL80211_BSS_BSSID])
1354 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1355 ETH_ALEN);
1356 if (bss[NL80211_BSS_FREQUENCY])
1357 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1358 if (bss[NL80211_BSS_BEACON_INTERVAL])
1359 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1360 if (bss[NL80211_BSS_CAPABILITY])
1361 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1362 r->flags |= WPA_SCAN_NOISE_INVALID;
1363 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1364 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1365 r->level /= 100; /* mBm to dBm */
1366 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1367 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1368 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1369 r->flags |= WPA_SCAN_LEVEL_INVALID;
1370 } else
1371 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1372 if (bss[NL80211_BSS_TSF])
1373 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1374 r->ie_len = ie_len;
1375 if (ie)
1376 os_memcpy(r + 1, ie, ie_len);
1377
1378 tmp = os_realloc(res->res,
1379 (res->num + 1) * sizeof(struct wpa_scan_res *));
1380 if (tmp == NULL) {
1381 os_free(r);
1382 return NL_SKIP;
1383 }
1384 tmp[res->num++] = r;
1385 res->res = tmp;
1386
1387 return NL_SKIP;
1388 }
1389
1390
1391 /**
1392 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1393 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1394 * Returns: Scan results on success, -1 on failure
1395 */
1396 static struct wpa_scan_results *
1397 wpa_driver_nl80211_get_scan_results(void *priv)
1398 {
1399 struct wpa_driver_nl80211_data *drv = priv;
1400 struct nl_msg *msg;
1401 struct wpa_scan_results *res;
1402 int ret;
1403
1404 res = os_zalloc(sizeof(*res));
1405 if (res == NULL)
1406 return 0;
1407 msg = nlmsg_alloc();
1408 if (!msg)
1409 goto nla_put_failure;
1410
1411 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1412 NL80211_CMD_GET_SCAN, 0);
1413 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1414
1415 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1416 msg = NULL;
1417 if (ret == 0) {
1418 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1419 (unsigned long) res->num);
1420 return res;
1421 }
1422 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1423 "(%s)", ret, strerror(-ret));
1424 nla_put_failure:
1425 nlmsg_free(msg);
1426 wpa_scan_results_free(res);
1427 return NULL;
1428 }
1429
1430
1431 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1432 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1433 const u8 *seq, size_t seq_len,
1434 const u8 *key, size_t key_len)
1435 {
1436 struct nl_msg *msg;
1437 int ret;
1438
1439 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1440 "set_tx=%d seq_len=%lu key_len=%lu",
1441 __func__, ifindex, alg, addr, key_idx, set_tx,
1442 (unsigned long) seq_len, (unsigned long) key_len);
1443
1444 msg = nlmsg_alloc();
1445 if (!msg)
1446 return -ENOMEM;
1447
1448 if (alg == WPA_ALG_NONE) {
1449 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1450 0, NL80211_CMD_DEL_KEY, 0);
1451 } else {
1452 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1453 0, NL80211_CMD_NEW_KEY, 0);
1454 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1455 switch (alg) {
1456 case WPA_ALG_WEP:
1457 if (key_len == 5)
1458 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1459 0x000FAC01);
1460 else
1461 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1462 0x000FAC05);
1463 break;
1464 case WPA_ALG_TKIP:
1465 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1466 break;
1467 case WPA_ALG_CCMP:
1468 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1469 break;
1470 case WPA_ALG_IGTK:
1471 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1472 break;
1473 default:
1474 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1475 "algorithm %d", __func__, alg);
1476 nlmsg_free(msg);
1477 return -1;
1478 }
1479 }
1480
1481 if (seq)
1482 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1483
1484 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1485 {
1486 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1487 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1488 }
1489 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1490 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1491
1492 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1493 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1494 ret = 0;
1495 if (ret)
1496 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1497 ret, strerror(-ret));
1498
1499 /*
1500 * If we failed or don't need to set the default TX key (below),
1501 * we're done here.
1502 */
1503 if (ret || !set_tx || alg == WPA_ALG_NONE)
1504 return ret;
1505 #ifdef HOSTAPD /* FIX: is this needed? */
1506 if (addr)
1507 return ret;
1508 #endif /* HOSTAPD */
1509
1510 msg = nlmsg_alloc();
1511 if (!msg)
1512 return -ENOMEM;
1513
1514 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1515 0, NL80211_CMD_SET_KEY, 0);
1516 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1517 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1518 if (alg == WPA_ALG_IGTK)
1519 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1520 else
1521 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1522
1523 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1524 if (ret == -ENOENT)
1525 ret = 0;
1526 if (ret)
1527 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1528 "err=%d %s)", ret, strerror(-ret));
1529 return ret;
1530
1531 nla_put_failure:
1532 return -ENOBUFS;
1533 }
1534
1535
1536 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1537 const u8 *addr, int key_idx,
1538 int set_tx, const u8 *seq,
1539 size_t seq_len,
1540 const u8 *key, size_t key_len)
1541 {
1542 struct wpa_driver_nl80211_data *drv = priv;
1543 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1544 seq_len, key, key_len);
1545 }
1546
1547
1548 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1549 const u8 *addr, int cmd, u16 reason_code)
1550 {
1551 int ret = -1;
1552 struct nl_msg *msg;
1553
1554 msg = nlmsg_alloc();
1555 if (!msg)
1556 return -1;
1557
1558 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1559
1560 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1561 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1562 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1563
1564 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1565 msg = NULL;
1566 if (ret) {
1567 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1568 "(%s)", ret, strerror(-ret));
1569 goto nla_put_failure;
1570 }
1571 ret = 0;
1572
1573 nla_put_failure:
1574 nlmsg_free(msg);
1575 return ret;
1576 }
1577
1578
1579 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1580 int reason_code)
1581 {
1582 struct wpa_driver_nl80211_data *drv = priv;
1583 wpa_printf(MSG_DEBUG, "%s", __func__);
1584 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1585 reason_code);
1586 }
1587
1588
1589 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1590 int reason_code)
1591 {
1592 struct wpa_driver_nl80211_data *drv = priv;
1593 wpa_printf(MSG_DEBUG, "%s", __func__);
1594 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1595 reason_code);
1596 }
1597
1598
1599 static int wpa_driver_nl80211_authenticate(
1600 void *priv, struct wpa_driver_auth_params *params)
1601 {
1602 struct wpa_driver_nl80211_data *drv = priv;
1603 int ret = -1, i;
1604 struct nl_msg *msg;
1605 enum nl80211_auth_type type;
1606
1607 drv->associated = 0;
1608
1609 msg = nlmsg_alloc();
1610 if (!msg)
1611 return -1;
1612
1613 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1614 drv->ifindex);
1615
1616 for (i = 0; i < 4; i++) {
1617 if (!params->wep_key[i])
1618 continue;
1619 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1620 i == params->wep_tx_keyidx, NULL, 0,
1621 params->wep_key[i],
1622 params->wep_key_len[i]);
1623 }
1624
1625 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1626 NL80211_CMD_AUTHENTICATE, 0);
1627
1628 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1629 if (params->bssid) {
1630 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1631 MAC2STR(params->bssid));
1632 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1633 }
1634 if (params->freq) {
1635 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1636 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1637 }
1638 if (params->ssid) {
1639 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1640 params->ssid, params->ssid_len);
1641 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1642 params->ssid);
1643 }
1644 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1645 if (params->ie)
1646 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1647 /*
1648 * TODO: if multiple auth_alg options enabled, try them one by one if
1649 * the AP rejects authentication due to unknown auth alg
1650 */
1651 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1652 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1653 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1654 type = NL80211_AUTHTYPE_SHARED_KEY;
1655 else if (params->auth_alg & AUTH_ALG_LEAP)
1656 type = NL80211_AUTHTYPE_NETWORK_EAP;
1657 else if (params->auth_alg & AUTH_ALG_FT)
1658 type = NL80211_AUTHTYPE_FT;
1659 else
1660 goto nla_put_failure;
1661 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1662 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1663
1664 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1665 msg = NULL;
1666 if (ret) {
1667 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1668 "(%s)", ret, strerror(-ret));
1669 goto nla_put_failure;
1670 }
1671 ret = 0;
1672 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1673 "successfully");
1674
1675 nla_put_failure:
1676 nlmsg_free(msg);
1677 return ret;
1678 }
1679
1680
1681 #if defined(CONFIG_AP) || defined(HOSTAPD)
1682
1683 struct phy_info_arg {
1684 u16 *num_modes;
1685 struct hostapd_hw_modes *modes;
1686 };
1687
1688 static int phy_info_handler(struct nl_msg *msg, void *arg)
1689 {
1690 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1691 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1692 struct phy_info_arg *phy_info = arg;
1693
1694 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1695
1696 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1697 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1698 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1699 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1700 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1701 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1702 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1703 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1704 };
1705
1706 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1707 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1708 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1709 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1710 };
1711
1712 struct nlattr *nl_band;
1713 struct nlattr *nl_freq;
1714 struct nlattr *nl_rate;
1715 int rem_band, rem_freq, rem_rate;
1716 struct hostapd_hw_modes *mode;
1717 int idx, mode_is_set;
1718
1719 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1720 genlmsg_attrlen(gnlh, 0), NULL);
1721
1722 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1723 return NL_SKIP;
1724
1725 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1726 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1727 if (!mode)
1728 return NL_SKIP;
1729 phy_info->modes = mode;
1730
1731 mode_is_set = 0;
1732
1733 mode = &phy_info->modes[*(phy_info->num_modes)];
1734 memset(mode, 0, sizeof(*mode));
1735 *(phy_info->num_modes) += 1;
1736
1737 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1738 nla_len(nl_band), NULL);
1739
1740 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1741 mode->ht_capab = nla_get_u16(
1742 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1743 }
1744
1745 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1746 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1747 nla_len(nl_freq), freq_policy);
1748 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1749 continue;
1750 mode->num_channels++;
1751 }
1752
1753 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1754 if (!mode->channels)
1755 return NL_SKIP;
1756
1757 idx = 0;
1758
1759 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1760 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1761 nla_len(nl_freq), freq_policy);
1762 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1763 continue;
1764
1765 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1766 mode->channels[idx].flag = 0;
1767
1768 if (!mode_is_set) {
1769 /* crude heuristic */
1770 if (mode->channels[idx].freq < 4000)
1771 mode->mode = HOSTAPD_MODE_IEEE80211B;
1772 else
1773 mode->mode = HOSTAPD_MODE_IEEE80211A;
1774 mode_is_set = 1;
1775 }
1776
1777 /* crude heuristic */
1778 if (mode->channels[idx].freq < 4000)
1779 if (mode->channels[idx].freq == 2484)
1780 mode->channels[idx].chan = 14;
1781 else
1782 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1783 else
1784 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1785
1786 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1787 mode->channels[idx].flag |=
1788 HOSTAPD_CHAN_DISABLED;
1789 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1790 mode->channels[idx].flag |=
1791 HOSTAPD_CHAN_PASSIVE_SCAN;
1792 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1793 mode->channels[idx].flag |=
1794 HOSTAPD_CHAN_NO_IBSS;
1795 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1796 mode->channels[idx].flag |=
1797 HOSTAPD_CHAN_RADAR;
1798
1799 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1800 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1801 mode->channels[idx].max_tx_power =
1802 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1803
1804 idx++;
1805 }
1806
1807 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1808 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1809 nla_len(nl_rate), rate_policy);
1810 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1811 continue;
1812 mode->num_rates++;
1813 }
1814
1815 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1816 if (!mode->rates)
1817 return NL_SKIP;
1818
1819 idx = 0;
1820
1821 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1822 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1823 nla_len(nl_rate), rate_policy);
1824 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1825 continue;
1826 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1827
1828 /* crude heuristic */
1829 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1830 mode->rates[idx].rate > 200)
1831 mode->mode = HOSTAPD_MODE_IEEE80211G;
1832
1833 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1834 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1835
1836 idx++;
1837 }
1838 }
1839
1840 return NL_SKIP;
1841 }
1842
1843 static struct hostapd_hw_modes *
1844 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1845 {
1846 u16 m;
1847 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1848 int i, mode11g_idx = -1;
1849
1850 /* If only 802.11g mode is included, use it to construct matching
1851 * 802.11b mode data. */
1852
1853 for (m = 0; m < *num_modes; m++) {
1854 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1855 return modes; /* 802.11b already included */
1856 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1857 mode11g_idx = m;
1858 }
1859
1860 if (mode11g_idx < 0)
1861 return modes; /* 2.4 GHz band not supported at all */
1862
1863 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1864 if (nmodes == NULL)
1865 return modes; /* Could not add 802.11b mode */
1866
1867 mode = &nmodes[*num_modes];
1868 os_memset(mode, 0, sizeof(*mode));
1869 (*num_modes)++;
1870 modes = nmodes;
1871
1872 mode->mode = HOSTAPD_MODE_IEEE80211B;
1873
1874 mode11g = &modes[mode11g_idx];
1875 mode->num_channels = mode11g->num_channels;
1876 mode->channels = os_malloc(mode11g->num_channels *
1877 sizeof(struct hostapd_channel_data));
1878 if (mode->channels == NULL) {
1879 (*num_modes)--;
1880 return modes; /* Could not add 802.11b mode */
1881 }
1882 os_memcpy(mode->channels, mode11g->channels,
1883 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1884
1885 mode->num_rates = 0;
1886 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1887 if (mode->rates == NULL) {
1888 os_free(mode->channels);
1889 (*num_modes)--;
1890 return modes; /* Could not add 802.11b mode */
1891 }
1892
1893 for (i = 0; i < mode11g->num_rates; i++) {
1894 if (mode11g->rates[i].rate > 110 ||
1895 mode11g->rates[i].flags &
1896 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1897 continue;
1898 mode->rates[mode->num_rates] = mode11g->rates[i];
1899 mode->num_rates++;
1900 if (mode->num_rates == 4)
1901 break;
1902 }
1903
1904 if (mode->num_rates == 0) {
1905 os_free(mode->channels);
1906 os_free(mode->rates);
1907 (*num_modes)--;
1908 return modes; /* No 802.11b rates */
1909 }
1910
1911 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1912 "information");
1913
1914 return modes;
1915 }
1916
1917
1918 static struct hostapd_hw_modes *
1919 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1920 {
1921 struct wpa_driver_nl80211_data *drv = priv;
1922 struct nl_msg *msg;
1923 struct phy_info_arg result = {
1924 .num_modes = num_modes,
1925 .modes = NULL,
1926 };
1927
1928 *num_modes = 0;
1929 *flags = 0;
1930
1931 msg = nlmsg_alloc();
1932 if (!msg)
1933 return NULL;
1934
1935 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1936 0, NL80211_CMD_GET_WIPHY, 0);
1937
1938 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1939
1940 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1941 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1942 nla_put_failure:
1943 return NULL;
1944 }
1945
1946
1947 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1948 const void *data, size_t len,
1949 int encrypt)
1950 {
1951 __u8 rtap_hdr[] = {
1952 0x00, 0x00, /* radiotap version */
1953 0x0e, 0x00, /* radiotap length */
1954 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1955 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1956 0x00, /* padding */
1957 0x00, 0x00, /* RX and TX flags to indicate that */
1958 0x00, 0x00, /* this is the injected frame directly */
1959 };
1960 struct iovec iov[2] = {
1961 {
1962 .iov_base = &rtap_hdr,
1963 .iov_len = sizeof(rtap_hdr),
1964 },
1965 {
1966 .iov_base = (void *) data,
1967 .iov_len = len,
1968 }
1969 };
1970 struct msghdr msg = {
1971 .msg_name = NULL,
1972 .msg_namelen = 0,
1973 .msg_iov = iov,
1974 .msg_iovlen = 2,
1975 .msg_control = NULL,
1976 .msg_controllen = 0,
1977 .msg_flags = 0,
1978 };
1979
1980 if (encrypt)
1981 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1982
1983 return sendmsg(drv->monitor_sock, &msg, 0);
1984 }
1985
1986
1987 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1988 size_t data_len)
1989 {
1990 struct wpa_driver_nl80211_data *drv = priv;
1991 struct ieee80211_mgmt *mgmt;
1992 int do_not_encrypt = 0;
1993 u16 fc;
1994
1995 mgmt = (struct ieee80211_mgmt *) data;
1996 fc = le_to_host16(mgmt->frame_control);
1997
1998 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
1999 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2000 /*
2001 * Only one of the authentication frame types is encrypted.
2002 * In order for static WEP encryption to work properly (i.e.,
2003 * to not encrypt the frame), we need to tell mac80211 about
2004 * the frames that must not be encrypted.
2005 */
2006 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2007 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2008 if (auth_alg == WLAN_AUTH_OPEN ||
2009 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2010 do_not_encrypt = 1;
2011 }
2012
2013 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2014 !do_not_encrypt);
2015 }
2016
2017 #endif /* CONFIG_AP || HOSTAPD */
2018
2019
2020 #ifdef CONFIG_AP
2021
2022 static int wpa_driver_nl80211_set_beacon(void *priv,
2023 const u8 *head, size_t head_len,
2024 const u8 *tail, size_t tail_len,
2025 int dtim_period)
2026 {
2027 struct wpa_driver_nl80211_data *drv = priv;
2028 struct nl_msg *msg;
2029 u8 cmd = NL80211_CMD_NEW_BEACON;
2030 int ret;
2031
2032 msg = nlmsg_alloc();
2033 if (!msg)
2034 return -ENOMEM;
2035
2036 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2037 drv->beacon_set);
2038 if (drv->beacon_set)
2039 cmd = NL80211_CMD_SET_BEACON;
2040
2041 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2042 0, cmd, 0);
2043 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2044 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2045 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2046 if (!drv->beacon_int)
2047 drv->beacon_int = 100;
2048 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2049 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2050
2051 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2052 if (ret) {
2053 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2054 ret, strerror(-ret));
2055 } else
2056 drv->beacon_set = 1;
2057 return ret;
2058 nla_put_failure:
2059 return -ENOBUFS;
2060 }
2061
2062
2063 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2064 {
2065 struct wpa_driver_nl80211_data *drv = priv;
2066 struct nl_msg *msg;
2067
2068 drv->beacon_int = value;
2069
2070 if (!drv->beacon_set)
2071 return 0;
2072
2073 msg = nlmsg_alloc();
2074 if (!msg)
2075 return -ENOMEM;
2076
2077 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2078 "(beacon_set=%d)", value, drv->beacon_set);
2079 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2080 0, NL80211_CMD_SET_BEACON, 0);
2081 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2082
2083 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2084
2085 return send_and_recv_msgs(drv, msg, NULL, NULL);
2086 nla_put_failure:
2087 return -ENOBUFS;
2088 }
2089
2090
2091 static int wpa_driver_nl80211_set_freq2(
2092 struct wpa_driver_nl80211_data *drv,
2093 struct wpa_driver_associate_params *params)
2094 {
2095 struct nl_msg *msg;
2096 int ret;
2097
2098 msg = nlmsg_alloc();
2099 if (!msg)
2100 return -1;
2101
2102 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2103 NL80211_CMD_SET_WIPHY, 0);
2104
2105 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2106
2107 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2108
2109 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2110 if (ret == 0)
2111 return 0;
2112 wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2113 "%d (%s)", params->freq, ret, strerror(-ret));
2114 nla_put_failure:
2115 return -1;
2116 }
2117
2118 #endif /* CONFIG_AP */
2119
2120 #if defined(CONFIG_AP) || defined(HOSTAPD)
2121
2122 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2123 int ifidx)
2124 {
2125 struct nl_msg *msg;
2126
2127 #ifdef HOSTAPD
2128 /* stop listening for EAPOL on this interface */
2129 del_ifidx(drv, ifidx);
2130 #endif /* HOSTAPD */
2131
2132 msg = nlmsg_alloc();
2133 if (!msg)
2134 goto nla_put_failure;
2135
2136 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2137 0, NL80211_CMD_DEL_INTERFACE, 0);
2138 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2139
2140 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2141 return;
2142 nla_put_failure:
2143 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2144 ifidx);
2145 }
2146
2147
2148 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2149 const char *ifname, enum nl80211_iftype iftype,
2150 const u8 *addr)
2151 {
2152 struct nl_msg *msg, *flags = NULL;
2153 int ifidx;
2154 int ret = -ENOBUFS;
2155 #ifdef HOSTAPD
2156 struct ifreq ifreq;
2157 struct iwreq iwr;
2158 #endif /* HOSTAPD */
2159
2160 msg = nlmsg_alloc();
2161 if (!msg)
2162 return -1;
2163
2164 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2165 0, NL80211_CMD_NEW_INTERFACE, 0);
2166 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2167 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2168 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2169
2170 if (iftype == NL80211_IFTYPE_MONITOR) {
2171 int err;
2172
2173 flags = nlmsg_alloc();
2174 if (!flags)
2175 goto nla_put_failure;
2176
2177 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2178
2179 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2180
2181 nlmsg_free(flags);
2182
2183 if (err)
2184 goto nla_put_failure;
2185 }
2186
2187 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2188 if (ret) {
2189 nla_put_failure:
2190 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2191 ifname);
2192 return ret;
2193 }
2194
2195 ifidx = if_nametoindex(ifname);
2196
2197 if (ifidx <= 0)
2198 return -1;
2199
2200 #ifdef HOSTAPD
2201 /* start listening for EAPOL on this interface */
2202 add_ifidx(drv, ifidx);
2203
2204 if (addr) {
2205 switch (iftype) {
2206 case NL80211_IFTYPE_AP:
2207 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2208 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2209 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2210
2211 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2212 nl80211_remove_iface(drv, ifidx);
2213 return -1;
2214 }
2215 break;
2216 case NL80211_IFTYPE_WDS:
2217 memset(&iwr, 0, sizeof(iwr));
2218 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2219 iwr.u.addr.sa_family = ARPHRD_ETHER;
2220 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2221 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2222 return -1;
2223 break;
2224 default:
2225 /* nothing */
2226 break;
2227 }
2228 }
2229 #endif /* HOSTAPD */
2230
2231 return ifidx;
2232 }
2233
2234 #endif /* CONFIG_AP || HOSTAPD */
2235
2236 #ifdef CONFIG_AP
2237
2238 void ap_tx_status(void *ctx, const u8 *addr,
2239 const u8 *buf, size_t len, int ack);
2240 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2241 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2242 struct hostapd_frame_info *fi);
2243 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2244
2245 #endif /* CONFIG_AP */
2246
2247 #if defined(CONFIG_AP) || defined(HOSTAPD)
2248
2249 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2250 {
2251 struct ieee80211_hdr *hdr;
2252 u16 fc, type, stype;
2253
2254 hdr = (struct ieee80211_hdr *) buf;
2255 fc = le_to_host16(hdr->frame_control);
2256
2257 type = WLAN_FC_GET_TYPE(fc);
2258 stype = WLAN_FC_GET_STYPE(fc);
2259
2260 switch (type) {
2261 case WLAN_FC_TYPE_MGMT:
2262 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2263 ok ? "ACK" : "fail");
2264 #ifdef HOSTAPD
2265 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2266 #else /* HOSTAPD */
2267 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2268 #endif /* HOSTAPD */
2269 break;
2270 case WLAN_FC_TYPE_CTRL:
2271 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2272 ok ? "ACK" : "fail");
2273 break;
2274 case WLAN_FC_TYPE_DATA:
2275 #ifdef HOSTAPD
2276 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2277 #else /* HOSTAPD */
2278 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2279 #endif /* HOSTAPD */
2280 break;
2281 default:
2282 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2283 type);
2284 break;
2285 }
2286 }
2287
2288 #endif /* CONFIG_AP || HOSTAPD */
2289
2290 #ifdef CONFIG_AP
2291
2292 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2293 u8 *buf, size_t len,
2294 struct hostapd_frame_info *hfi,
2295 enum ieee80211_msg_type msg_type)
2296 {
2297 struct ieee80211_hdr *hdr;
2298 u16 fc, type, stype;
2299 size_t data_len = len;
2300
2301 /*
2302 * PS-Poll frames are 16 bytes. All other frames are
2303 * 24 bytes or longer.
2304 */
2305 if (len < 16)
2306 return;
2307
2308 hdr = (struct ieee80211_hdr *) buf;
2309 fc = le_to_host16(hdr->frame_control);
2310
2311 type = WLAN_FC_GET_TYPE(fc);
2312 stype = WLAN_FC_GET_STYPE(fc);
2313
2314 switch (type) {
2315 case WLAN_FC_TYPE_DATA:
2316 if (len < 24)
2317 return;
2318 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2319 case WLAN_FC_TODS:
2320 break;
2321 case WLAN_FC_FROMDS:
2322 break;
2323 default:
2324 /* discard */
2325 return;
2326 }
2327 break;
2328 case WLAN_FC_TYPE_CTRL:
2329 /* discard non-ps-poll frames */
2330 if (stype != WLAN_FC_STYPE_PSPOLL)
2331 return;
2332 break;
2333 case WLAN_FC_TYPE_MGMT:
2334 break;
2335 default:
2336 /* discard */
2337 return;
2338 }
2339
2340 switch (msg_type) {
2341 case ieee80211_msg_normal:
2342 /* continue processing */
2343 break;
2344 case ieee80211_msg_tx_callback_ack:
2345 handle_tx_callback(drv->ctx, buf, data_len, 1);
2346 return;
2347 case ieee80211_msg_tx_callback_fail:
2348 handle_tx_callback(drv->ctx, buf, data_len, 0);
2349 return;
2350 }
2351
2352 switch (type) {
2353 case WLAN_FC_TYPE_MGMT:
2354 if (stype != WLAN_FC_STYPE_BEACON &&
2355 stype != WLAN_FC_STYPE_PROBE_REQ)
2356 wpa_printf(MSG_MSGDUMP, "MGMT");
2357 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2358 break;
2359 case WLAN_FC_TYPE_CTRL:
2360 /* can only get here with PS-Poll frames */
2361 wpa_printf(MSG_DEBUG, "CTRL");
2362 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2363 break;
2364 case WLAN_FC_TYPE_DATA:
2365 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2366 break;
2367 }
2368 }
2369
2370 #endif /* CONFIG_AP */
2371
2372 #if defined(CONFIG_AP) || defined(HOSTAPD)
2373
2374 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2375 {
2376 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2377 int len;
2378 unsigned char buf[3000];
2379 struct ieee80211_radiotap_iterator iter;
2380 int ret;
2381 struct hostapd_frame_info hfi;
2382 int injected = 0, failed = 0, msg_type, rxflags = 0;
2383
2384 len = recv(sock, buf, sizeof(buf), 0);
2385 if (len < 0) {
2386 perror("recv");
2387 return;
2388 }
2389
2390 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2391 printf("received invalid radiotap frame\n");
2392 return;
2393 }
2394
2395 memset(&hfi, 0, sizeof(hfi));
2396
2397 while (1) {
2398 ret = ieee80211_radiotap_iterator_next(&iter);
2399 if (ret == -ENOENT)
2400 break;
2401 if (ret) {
2402 printf("received invalid radiotap frame (%d)\n", ret);
2403 return;
2404 }
2405 switch (iter.this_arg_index) {
2406 case IEEE80211_RADIOTAP_FLAGS:
2407 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2408 len -= 4;
2409 break;
2410 case IEEE80211_RADIOTAP_RX_FLAGS:
2411 rxflags = 1;
2412 break;
2413 case IEEE80211_RADIOTAP_TX_FLAGS:
2414 injected = 1;
2415 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2416 IEEE80211_RADIOTAP_F_TX_FAIL;
2417 break;
2418 case IEEE80211_RADIOTAP_DATA_RETRIES:
2419 break;
2420 case IEEE80211_RADIOTAP_CHANNEL:
2421 /* TODO convert from freq/flags to channel number
2422 hfi.channel = XXX;
2423 hfi.phytype = XXX;
2424 */
2425 break;
2426 case IEEE80211_RADIOTAP_RATE:
2427 hfi.datarate = *iter.this_arg * 5;
2428 break;
2429 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2430 hfi.ssi_signal = *iter.this_arg;
2431 break;
2432 }
2433 }
2434
2435 if (rxflags && injected)
2436 return;
2437
2438 if (!injected)
2439 msg_type = ieee80211_msg_normal;
2440 else if (failed)
2441 msg_type = ieee80211_msg_tx_callback_fail;
2442 else
2443 msg_type = ieee80211_msg_tx_callback_ack;
2444
2445 handle_frame(drv, buf + iter.max_length,
2446 len - iter.max_length, &hfi, msg_type);
2447 }
2448
2449
2450 /*
2451 * we post-process the filter code later and rewrite
2452 * this to the offset to the last instruction
2453 */
2454 #define PASS 0xFF
2455 #define FAIL 0xFE
2456
2457 static struct sock_filter msock_filter_insns[] = {
2458 /*
2459 * do a little-endian load of the radiotap length field
2460 */
2461 /* load lower byte into A */
2462 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2463 /* put it into X (== index register) */
2464 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2465 /* load upper byte into A */
2466 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2467 /* left-shift it by 8 */
2468 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2469 /* or with X */
2470 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2471 /* put result into X */
2472 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2473
2474 /*
2475 * Allow management frames through, this also gives us those
2476 * management frames that we sent ourselves with status
2477 */
2478 /* load the lower byte of the IEEE 802.11 frame control field */
2479 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2480 /* mask off frame type and version */
2481 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2482 /* accept frame if it's both 0, fall through otherwise */
2483 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2484
2485 /*
2486 * TODO: add a bit to radiotap RX flags that indicates
2487 * that the sending station is not associated, then
2488 * add a filter here that filters on our DA and that flag
2489 * to allow us to deauth frames to that bad station.
2490 *
2491 * Not a regression -- we didn't do it before either.
2492 */
2493
2494 #if 0
2495 /*
2496 * drop non-data frames, WDS frames
2497 */
2498 /* load the lower byte of the frame control field */
2499 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2500 /* mask off QoS bit */
2501 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2502 /* drop non-data frames */
2503 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2504 /* load the upper byte of the frame control field */
2505 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2506 /* mask off toDS/fromDS */
2507 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2508 /* drop WDS frames */
2509 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2510 #endif
2511
2512 /*
2513 * add header length to index
2514 */
2515 /* load the lower byte of the frame control field */
2516 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2517 /* mask off QoS bit */
2518 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2519 /* right shift it by 6 to give 0 or 2 */
2520 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2521 /* add data frame header length */
2522 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2523 /* add index, was start of 802.11 header */
2524 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2525 /* move to index, now start of LL header */
2526 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2527
2528 /*
2529 * Accept empty data frames, we use those for
2530 * polling activity.
2531 */
2532 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2533 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2534
2535 /*
2536 * Accept EAPOL frames
2537 */
2538 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2539 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2540 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2541 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2542
2543 /* keep these last two statements or change the code below */
2544 /* return 0 == "DROP" */
2545 BPF_STMT(BPF_RET | BPF_K, 0),
2546 /* return ~0 == "keep all" */
2547 BPF_STMT(BPF_RET | BPF_K, ~0),
2548 };
2549
2550 static struct sock_fprog msock_filter = {
2551 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2552 .filter = msock_filter_insns,
2553 };
2554
2555
2556 static int add_monitor_filter(int s)
2557 {
2558 int idx;
2559
2560 /* rewrite all PASS/FAIL jump offsets */
2561 for (idx = 0; idx < msock_filter.len; idx++) {
2562 struct sock_filter *insn = &msock_filter_insns[idx];
2563
2564 if (BPF_CLASS(insn->code) == BPF_JMP) {
2565 if (insn->code == (BPF_JMP|BPF_JA)) {
2566 if (insn->k == PASS)
2567 insn->k = msock_filter.len - idx - 2;
2568 else if (insn->k == FAIL)
2569 insn->k = msock_filter.len - idx - 3;
2570 }
2571
2572 if (insn->jt == PASS)
2573 insn->jt = msock_filter.len - idx - 2;
2574 else if (insn->jt == FAIL)
2575 insn->jt = msock_filter.len - idx - 3;
2576
2577 if (insn->jf == PASS)
2578 insn->jf = msock_filter.len - idx - 2;
2579 else if (insn->jf == FAIL)
2580 insn->jf = msock_filter.len - idx - 3;
2581 }
2582 }
2583
2584 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2585 &msock_filter, sizeof(msock_filter))) {
2586 perror("SO_ATTACH_FILTER");
2587 return -1;
2588 }
2589
2590 return 0;
2591 }
2592
2593
2594 static int
2595 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2596 {
2597 char buf[IFNAMSIZ];
2598 struct sockaddr_ll ll;
2599 int optval;
2600 socklen_t optlen;
2601
2602 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2603 buf[IFNAMSIZ - 1] = '\0';
2604
2605 drv->monitor_ifidx =
2606 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2607
2608 if (drv->monitor_ifidx < 0)
2609 return -1;
2610
2611 if (hostapd_set_iface_flags(drv, buf, 1))
2612 goto error;
2613
2614 memset(&ll, 0, sizeof(ll));
2615 ll.sll_family = AF_PACKET;
2616 ll.sll_ifindex = drv->monitor_ifidx;
2617 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2618 if (drv->monitor_sock < 0) {
2619 perror("socket[PF_PACKET,SOCK_RAW]");
2620 goto error;
2621 }
2622
2623 if (add_monitor_filter(drv->monitor_sock)) {
2624 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2625 "interface; do filtering in user space");
2626 /* This works, but will cost in performance. */
2627 }
2628
2629 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2630 perror("monitor socket bind");
2631 goto error;
2632 }
2633
2634 optlen = sizeof(optval);
2635 optval = 20;
2636 if (setsockopt
2637 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2638 perror("Failed to set socket priority");
2639 goto error;
2640 }
2641
2642 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2643 drv, NULL)) {
2644 printf("Could not register monitor read socket\n");
2645 goto error;
2646 }
2647
2648 return 0;
2649 error:
2650 nl80211_remove_iface(drv, drv->monitor_ifidx);
2651 return -1;
2652 }
2653
2654 #endif /* CONFIG_AP || HOSTAPD */
2655
2656 #ifdef CONFIG_AP
2657
2658 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2659 struct wpa_driver_associate_params *params)
2660 {
2661 if (drv->monitor_ifidx < 0 &&
2662 nl80211_create_monitor_interface(drv))
2663 return -1;
2664
2665 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2666 wpa_driver_nl80211_set_freq2(drv, params)) {
2667 nl80211_remove_iface(drv, drv->monitor_ifidx);
2668 drv->monitor_ifidx = -1;
2669 return -1;
2670 }
2671
2672 /* TODO: setup monitor interface (and add code somewhere to remove this
2673 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2674
2675 return 0;
2676 }
2677 #endif /* CONFIG_AP */
2678
2679
2680 static int wpa_driver_nl80211_associate(
2681 void *priv, struct wpa_driver_associate_params *params)
2682 {
2683 struct wpa_driver_nl80211_data *drv = priv;
2684 int ret = -1;
2685 struct nl_msg *msg;
2686
2687 #ifdef CONFIG_AP
2688 if (params->mode == 2)
2689 return wpa_driver_nl80211_ap(drv, params);
2690 #endif /* CONFIG_AP */
2691
2692 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2693 params->drop_unencrypted);
2694
2695 drv->associated = 0;
2696
2697 msg = nlmsg_alloc();
2698 if (!msg)
2699 return -1;
2700
2701 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2702 drv->ifindex);
2703 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2704 NL80211_CMD_ASSOCIATE, 0);
2705
2706 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2707 if (params->bssid) {
2708 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2709 MAC2STR(params->bssid));
2710 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2711 }
2712 if (params->freq) {
2713 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2714 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2715 }
2716 if (params->ssid) {
2717 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2718 params->ssid, params->ssid_len);
2719 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2720 params->ssid);
2721 if (params->ssid_len > sizeof(drv->ssid))
2722 goto nla_put_failure;
2723 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2724 drv->ssid_len = params->ssid_len;
2725 }
2726 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2727 if (params->wpa_ie)
2728 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2729 params->wpa_ie);
2730
2731 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2732 msg = NULL;
2733 if (ret) {
2734 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2735 "(%s)", ret, strerror(-ret));
2736 goto nla_put_failure;
2737 }
2738 ret = 0;
2739 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2740 "successfully");
2741
2742 nla_put_failure:
2743 nlmsg_free(msg);
2744 return ret;
2745 }
2746
2747
2748 /**
2749 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2750 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2751 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2752 * Returns: 0 on success, -1 on failure
2753 */
2754 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2755 int mode)
2756 {
2757 int ret = -1;
2758 struct nl_msg *msg;
2759 int nlmode;
2760
2761 switch (mode) {
2762 case 0:
2763 nlmode = NL80211_IFTYPE_STATION;
2764 break;
2765 case 1:
2766 nlmode = NL80211_IFTYPE_ADHOC;
2767 break;
2768 case 2:
2769 nlmode = NL80211_IFTYPE_AP;
2770 break;
2771 default:
2772 return -1;
2773 }
2774
2775 msg = nlmsg_alloc();
2776 if (!msg)
2777 return -1;
2778
2779 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2780 0, NL80211_CMD_SET_INTERFACE, 0);
2781 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2782 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2783
2784 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2785 if (!ret)
2786 return 0;
2787 else
2788 goto try_again;
2789
2790 nla_put_failure:
2791 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2792 ret, strerror(-ret));
2793 return -1;
2794
2795 try_again:
2796 /* mac80211 doesn't allow mode changes while the device is up, so
2797 * take the device down, try to set the mode again, and bring the
2798 * device back up.
2799 */
2800 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2801 /* Try to set the mode again while the interface is down */
2802 msg = nlmsg_alloc();
2803 if (!msg)
2804 return -1;
2805
2806 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2807 0, NL80211_CMD_SET_INTERFACE, 0);
2808 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2809 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2810 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2811 if (ret) {
2812 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2813 "mode(try_again): %d (%s)",
2814 drv->ifname, ret, strerror(-ret));
2815 }
2816
2817 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2818 ret = -1;
2819 }
2820
2821 return ret;
2822 }
2823
2824
2825 static int wpa_driver_nl80211_get_capa(void *priv,
2826 struct wpa_driver_capa *capa)
2827 {
2828 struct wpa_driver_nl80211_data *drv = priv;
2829 if (!drv->has_capability)
2830 return -1;
2831 os_memcpy(capa, &drv->capa, sizeof(*capa));
2832 return 0;
2833 }
2834
2835
2836 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2837 {
2838 struct wpa_driver_nl80211_data *drv = priv;
2839
2840 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2841 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2842 drv->operstate = state;
2843 return wpa_driver_nl80211_send_oper_ifla(
2844 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2845 }
2846
2847
2848 #ifdef HOSTAPD
2849
2850 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2851
2852 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2853 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2854
2855
2856 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2857 const char *iface)
2858 {
2859 struct i802_bss *bss = &drv->bss;
2860 while (bss) {
2861 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2862 return bss;
2863 bss = bss->next;
2864 }
2865 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2866 return NULL;
2867 }
2868
2869
2870 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2871 {
2872 int i;
2873 int *old;
2874
2875 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2876 ifidx);
2877 for (i = 0; i < drv->num_if_indices; i++) {
2878 if (drv->if_indices[i] == 0) {
2879 drv->if_indices[i] = ifidx;
2880 return;
2881 }
2882 }
2883
2884 if (drv->if_indices != drv->default_if_indices)
2885 old = drv->if_indices;
2886 else
2887 old = NULL;
2888
2889 drv->if_indices = realloc(old,
2890 sizeof(int) * (drv->num_if_indices + 1));
2891 if (!drv->if_indices) {
2892 if (!old)
2893 drv->if_indices = drv->default_if_indices;
2894 else
2895 drv->if_indices = old;
2896 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2897 "interfaces");
2898 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2899 return;
2900 }
2901 drv->if_indices[drv->num_if_indices] = ifidx;
2902 drv->num_if_indices++;
2903 }
2904
2905
2906 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2907 {
2908 int i;
2909
2910 for (i = 0; i < drv->num_if_indices; i++) {
2911 if (drv->if_indices[i] == ifidx) {
2912 drv->if_indices[i] = 0;
2913 break;
2914 }
2915 }
2916 }
2917
2918
2919 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2920 {
2921 int i;
2922
2923 for (i = 0; i < drv->num_if_indices; i++)
2924 if (drv->if_indices[i] == ifidx)
2925 return 1;
2926
2927 return 0;
2928 }
2929
2930
2931 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2932 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2933 size_t seq_len, const u8 *key, size_t key_len)
2934 {
2935 struct wpa_driver_nl80211_data *drv = priv;
2936 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2937 set_tx, seq, seq_len, key, key_len);
2938 }
2939
2940
2941 static inline int min_int(int a, int b)
2942 {
2943 if (a < b)
2944 return a;
2945 return b;
2946 }
2947
2948
2949 static int get_key_handler(struct nl_msg *msg, void *arg)
2950 {
2951 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2952 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2953
2954 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2955 genlmsg_attrlen(gnlh, 0), NULL);
2956
2957 /*
2958 * TODO: validate the key index and mac address!
2959 * Otherwise, there's a race condition as soon as
2960 * the kernel starts sending key notifications.
2961 */
2962
2963 if (tb[NL80211_ATTR_KEY_SEQ])
2964 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2965 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
2966 return NL_SKIP;
2967 }
2968
2969
2970 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
2971 int idx, u8 *seq)
2972 {
2973 struct wpa_driver_nl80211_data *drv = priv;
2974 struct nl_msg *msg;
2975
2976 msg = nlmsg_alloc();
2977 if (!msg)
2978 return -ENOMEM;
2979
2980 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2981 0, NL80211_CMD_GET_KEY, 0);
2982
2983 if (addr)
2984 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2985 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2986 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
2987
2988 memset(seq, 0, 6);
2989
2990 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
2991 nla_put_failure:
2992 return -ENOBUFS;
2993 }
2994
2995
2996 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
2997 int mode)
2998 {
2999 struct wpa_driver_nl80211_data *drv = priv;
3000 struct nl_msg *msg;
3001 u8 rates[NL80211_MAX_SUPP_RATES];
3002 u8 rates_len = 0;
3003 int i;
3004
3005 msg = nlmsg_alloc();
3006 if (!msg)
3007 return -ENOMEM;
3008
3009 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3010 NL80211_CMD_SET_BSS, 0);
3011
3012 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3013 rates[rates_len++] = basic_rates[i] / 5;
3014
3015 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3016
3017 /* TODO: multi-BSS support */
3018 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3019
3020 return send_and_recv_msgs(drv, msg, NULL, NULL);
3021 nla_put_failure:
3022 return -ENOBUFS;
3023 }
3024
3025
3026 /* Set kernel driver on given frequency (MHz) */
3027 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3028 {
3029 struct wpa_driver_nl80211_data *drv = priv;
3030 struct nl_msg *msg;
3031
3032 msg = nlmsg_alloc();
3033 if (!msg)
3034 return -1;
3035
3036 drv->last_freq = freq->freq;
3037 drv->last_freq_ht = freq->ht_enabled;
3038
3039 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3040 NL80211_CMD_SET_WIPHY, 0);
3041
3042 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3043 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3044 if (freq->ht_enabled) {
3045 switch (freq->sec_channel_offset) {
3046 case -1:
3047 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3048 NL80211_CHAN_HT40MINUS);
3049 break;
3050 case 1:
3051 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3052 NL80211_CHAN_HT40PLUS);
3053 break;
3054 default:
3055 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3056 NL80211_CHAN_HT20);
3057 break;
3058 }
3059 }
3060
3061 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3062 return 0;
3063 nla_put_failure:
3064 return -1;
3065 }
3066
3067
3068 static int i802_set_rts(void *priv, int rts)
3069 {
3070 struct wpa_driver_nl80211_data *drv = priv;
3071 struct iwreq iwr;
3072
3073 memset(&iwr, 0, sizeof(iwr));
3074 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3075 iwr.u.rts.value = rts;
3076 iwr.u.rts.fixed = 1;
3077
3078 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3079 perror("ioctl[SIOCSIWRTS]");
3080 return -1;
3081 }
3082
3083 return 0;
3084 }
3085
3086
3087 static int i802_set_frag(void *priv, int frag)
3088 {
3089 struct wpa_driver_nl80211_data *drv = priv;
3090 struct iwreq iwr;
3091
3092 memset(&iwr, 0, sizeof(iwr));
3093 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3094 iwr.u.frag.value = frag;
3095 iwr.u.frag.fixed = 1;
3096
3097 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3098 perror("ioctl[SIOCSIWFRAG]");
3099 return -1;
3100 }
3101
3102 return 0;
3103 }
3104
3105
3106 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3107 {
3108 struct wpa_driver_nl80211_data *drv = priv;
3109 struct iwreq iwr;
3110
3111 memset(&iwr, 0, sizeof(iwr));
3112 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3113
3114 iwr.u.retry.value = short_retry;
3115 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3116 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3117 perror("ioctl[SIOCSIWRETRY(short)]");
3118 return -1;
3119 }
3120
3121 iwr.u.retry.value = long_retry;
3122 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3123 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3124 perror("ioctl[SIOCSIWRETRY(long)]");
3125 return -1;
3126 }
3127
3128 return 0;
3129 }
3130
3131
3132 static int i802_flush(void *priv)
3133 {
3134 struct wpa_driver_nl80211_data *drv = priv;
3135 struct nl_msg *msg;
3136
3137 msg = nlmsg_alloc();
3138 if (!msg)
3139 return -1;
3140
3141 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3142 0, NL80211_CMD_DEL_STATION, 0);
3143
3144 /*
3145 * XXX: FIX! this needs to flush all VLANs too
3146 */
3147 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3148 if_nametoindex(drv->ifname));
3149
3150 return send_and_recv_msgs(drv, msg, NULL, NULL);
3151 nla_put_failure:
3152 return -ENOBUFS;
3153 }
3154
3155
3156 static int get_sta_handler(struct nl_msg *msg, void *arg)
3157 {
3158 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3159 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3160 struct hostap_sta_driver_data *data = arg;
3161 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3162 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3163 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3164 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3165 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3166 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3167 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3168 };
3169
3170 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3171 genlmsg_attrlen(gnlh, 0), NULL);
3172
3173 /*
3174 * TODO: validate the interface and mac address!
3175 * Otherwise, there's a race condition as soon as
3176 * the kernel starts sending station notifications.
3177 */
3178
3179 if (!tb[NL80211_ATTR_STA_INFO]) {
3180 wpa_printf(MSG_DEBUG, "sta stats missing!");
3181 return NL_SKIP;
3182 }
3183 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3184 tb[NL80211_ATTR_STA_INFO],
3185 stats_policy)) {
3186 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3187 return NL_SKIP;
3188 }
3189
3190 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3191 data->inactive_msec =
3192 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3193 if (stats[NL80211_STA_INFO_RX_BYTES])
3194 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3195 if (stats[NL80211_STA_INFO_TX_BYTES])
3196 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3197 if (stats[NL80211_STA_INFO_RX_PACKETS])
3198 data->rx_packets =
3199 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3200 if (stats[NL80211_STA_INFO_TX_PACKETS])
3201 data->tx_packets =
3202 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3203
3204 return NL_SKIP;
3205 }
3206
3207 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3208 const u8 *addr)
3209 {
3210 struct wpa_driver_nl80211_data *drv = priv;
3211 struct nl_msg *msg;
3212
3213 os_memset(data, 0, sizeof(*data));
3214 msg = nlmsg_alloc();
3215 if (!msg)
3216 return -ENOMEM;
3217
3218 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3219 0, NL80211_CMD_GET_STATION, 0);
3220
3221 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3222 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3223
3224 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3225 nla_put_failure:
3226 return -ENOBUFS;
3227 }
3228
3229
3230 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3231 size_t data_len, int encrypt, const u8 *own_addr)
3232 {
3233 struct wpa_driver_nl80211_data *drv = priv;
3234 struct ieee80211_hdr *hdr;
3235 size_t len;
3236 u8 *pos;
3237 int res;
3238 #if 0 /* FIX */
3239 int qos = sta->flags & WLAN_STA_WME;
3240 #else
3241 int qos = 0;
3242 #endif
3243
3244 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3245 data_len;
3246 hdr = os_zalloc(len);
3247 if (hdr == NULL) {
3248 printf("malloc() failed for i802_send_data(len=%lu)\n",
3249 (unsigned long) len);
3250 return -1;
3251 }
3252
3253 hdr->frame_control =
3254 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3255 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3256 if (encrypt)
3257 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3258 #if 0 /* To be enabled if qos determination is added above */
3259 if (qos) {
3260 hdr->frame_control |=
3261 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3262 }
3263 #endif
3264
3265 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3266 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3267 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3268 pos = (u8 *) (hdr + 1);
3269
3270 #if 0 /* To be enabled if qos determination is added above */
3271 if (qos) {
3272 /* add an empty QoS header if needed */
3273 pos[0] = 0;
3274 pos[1] = 0;
3275 pos += 2;
3276 }
3277 #endif
3278
3279 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3280 pos += sizeof(rfc1042_header);
3281 WPA_PUT_BE16(pos, ETH_P_PAE);
3282 pos += 2;
3283 memcpy(pos, data, data_len);
3284
3285 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3286 if (res < 0) {
3287 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3288 "failed: %d (%s)",
3289 (unsigned long) len, errno, strerror(errno));
3290 }
3291 free(hdr);
3292
3293 return res;
3294 }
3295
3296
3297 static int i802_sta_add(const char *ifname, void *priv,
3298 struct hostapd_sta_add_params *params)
3299 {
3300 struct wpa_driver_nl80211_data *drv = priv;
3301 struct nl_msg *msg;
3302 int ret = -ENOBUFS;
3303
3304 msg = nlmsg_alloc();
3305 if (!msg)
3306 return -ENOMEM;
3307
3308 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3309 0, NL80211_CMD_NEW_STATION, 0);
3310
3311 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3312 if_nametoindex(drv->ifname));
3313 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3314 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3315 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3316 params->supp_rates);
3317 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3318 params->listen_interval);
3319
3320 #ifdef CONFIG_IEEE80211N
3321 if (params->ht_capabilities) {
3322 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3323 params->ht_capabilities->length,
3324 &params->ht_capabilities->data);
3325 }
3326 #endif /* CONFIG_IEEE80211N */
3327
3328 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3329 if (ret)
3330 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3331 "result: %d (%s)", ret, strerror(-ret));
3332 if (ret == -EEXIST)
3333 ret = 0;
3334 nla_put_failure:
3335 return ret;
3336 }
3337
3338
3339 static int i802_sta_remove(void *priv, const u8 *addr)
3340 {
3341 struct wpa_driver_nl80211_data *drv = priv;
3342 struct nl_msg *msg;
3343 int ret;
3344
3345 msg = nlmsg_alloc();
3346 if (!msg)
3347 return -ENOMEM;
3348
3349 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3350 0, NL80211_CMD_DEL_STATION, 0);
3351
3352 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3353 if_nametoindex(drv->ifname));
3354 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3355
3356 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3357 if (ret == -ENOENT)
3358 return 0;
3359 return ret;
3360 nla_put_failure:
3361 return -ENOBUFS;
3362 }
3363
3364
3365 static int i802_sta_set_flags(void *priv, const u8 *addr,
3366 int total_flags, int flags_or, int flags_and)
3367 {
3368 struct wpa_driver_nl80211_data *drv = priv;
3369 struct nl_msg *msg, *flags = NULL;
3370
3371 msg = nlmsg_alloc();
3372 if (!msg)
3373 return -ENOMEM;
3374
3375 flags = nlmsg_alloc();
3376 if (!flags) {
3377 nlmsg_free(msg);
3378 return -ENOMEM;
3379 }
3380
3381 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3382 0, NL80211_CMD_SET_STATION, 0);
3383
3384 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3385 if_nametoindex(drv->ifname));
3386 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3387
3388 if (total_flags & WLAN_STA_AUTHORIZED)
3389 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3390
3391 if (total_flags & WLAN_STA_WMM)
3392 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3393
3394 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3395 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3396
3397 if (total_flags & WLAN_STA_MFP)
3398 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3399
3400 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3401 goto nla_put_failure;
3402
3403 nlmsg_free(flags);
3404
3405 return send_and_recv_msgs(drv, msg, NULL, NULL);
3406 nla_put_failure:
3407 nlmsg_free(flags);
3408 return -ENOBUFS;
3409 }
3410
3411
3412 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3413 int cw_min, int cw_max, int burst_time)
3414 {
3415 struct wpa_driver_nl80211_data *drv = priv;
3416 struct nl_msg *msg;
3417 struct nlattr *txq, *params;
3418
3419 msg = nlmsg_alloc();
3420 if (!msg)
3421 return -1;
3422
3423 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3424 0, NL80211_CMD_SET_WIPHY, 0);
3425
3426 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3427
3428 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3429 if (!txq)
3430 goto nla_put_failure;
3431
3432 /* We are only sending parameters for a single TXQ at a time */
3433 params = nla_nest_start(msg, 1);
3434 if (!params)
3435 goto nla_put_failure;
3436
3437 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3438 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3439 * 32 usec, so need to convert the value here. */
3440 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3441 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3442 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3443 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3444
3445 nla_nest_end(msg, params);
3446
3447 nla_nest_end(msg, txq);
3448
3449 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3450 return 0;
3451 nla_put_failure:
3452 return -1;
3453 }
3454
3455
3456 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3457 {
3458 struct wpa_driver_nl80211_data *drv = priv;
3459 int ifidx;
3460 struct i802_bss *bss;
3461
3462 bss = os_zalloc(sizeof(*bss));
3463 if (bss == NULL)
3464 return -1;
3465 os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3466
3467 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3468 if (ifidx < 0) {
3469 os_free(bss);
3470 return -1;
3471 }
3472 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3473 nl80211_remove_iface(priv, ifidx);
3474 os_free(bss);
3475 return -1;
3476 }
3477 bss->next = drv->bss.next;
3478 drv->bss.next = bss;
3479 return 0;
3480 }
3481
3482
3483 static int i802_bss_remove(void *priv, const char *ifname)
3484 {
3485 struct wpa_driver_nl80211_data *drv = priv;
3486 struct i802_bss *bss, *prev;
3487 nl80211_remove_iface(priv, if_nametoindex(ifname));
3488 prev = &drv->bss;
3489 bss = drv->bss.next;
3490 while (bss) {
3491 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3492 prev->next = bss->next;
3493 os_free(bss);
3494 break;
3495 }
3496 prev = bss;
3497 bss = bss->next;
3498 }
3499 return 0;
3500 }
3501
3502
3503 static int i802_set_beacon(const char *iface, void *priv,
3504 const u8 *head, size_t head_len,
3505 const u8 *tail, size_t tail_len, int dtim_period)
3506 {
3507 struct wpa_driver_nl80211_data *drv = priv;
3508 struct nl_msg *msg;
3509 u8 cmd = NL80211_CMD_NEW_BEACON;
3510 int ret;
3511 struct i802_bss *bss;
3512
3513 bss = get_bss(drv, iface);
3514 if (bss == NULL)
3515 return -ENOENT;
3516
3517 msg = nlmsg_alloc();
3518 if (!msg)
3519 return -ENOMEM;
3520
3521 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3522 iface, bss->beacon_set);
3523 if (bss->beacon_set)
3524 cmd = NL80211_CMD_SET_BEACON;
3525
3526 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3527 0, cmd, 0);
3528 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3529 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3530 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3531 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3532 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3533
3534 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3535 if (!ret)
3536 bss->beacon_set = 1;
3537 return ret;
3538 nla_put_failure:
3539 return -ENOBUFS;
3540 }
3541
3542
3543 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3544 {
3545 struct nl_msg *msg;
3546
3547 msg = nlmsg_alloc();
3548 if (!msg)
3549 return -ENOMEM;
3550
3551 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3552 0, NL80211_CMD_DEL_BEACON, 0);
3553 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3554
3555 return send_and_recv_msgs(drv, msg, NULL, NULL);
3556 nla_put_failure:
3557 return -ENOBUFS;
3558 }
3559
3560
3561 static int i802_set_beacon_int(void *priv, int value)
3562 {
3563 struct wpa_driver_nl80211_data *drv = priv;
3564 struct nl_msg *msg;
3565
3566 drv->beacon_int = value;
3567
3568 if (!drv->bss.beacon_set)
3569 return 0;
3570
3571 msg = nlmsg_alloc();
3572 if (!msg)
3573 return -ENOMEM;
3574
3575 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3576 "(beacon_set=%d)", value, drv->bss.beacon_set);
3577 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3578 0, NL80211_CMD_SET_BEACON, 0);
3579 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3580
3581 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3582
3583 return send_and_recv_msgs(drv, msg, NULL, NULL);
3584 nla_put_failure:
3585 return -ENOBUFS;
3586 }
3587
3588
3589 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3590 {
3591 struct wpa_driver_nl80211_data *drv = priv;
3592 struct nl_msg *msg;
3593
3594 msg = nlmsg_alloc();
3595 if (!msg)
3596 return -ENOMEM;
3597
3598 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3599 NL80211_CMD_SET_BSS, 0);
3600
3601 if (cts >= 0)
3602 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3603 if (preamble >= 0)
3604 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3605 if (slot >= 0)
3606 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3607
3608 /* TODO: multi-BSS support */
3609 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3610
3611 return send_and_recv_msgs(drv, msg, NULL, NULL);
3612 nla_put_failure:
3613 return -ENOBUFS;
3614 }
3615
3616
3617 static int i802_set_cts_protect(void *priv, int value)
3618 {
3619 return i802_set_bss(priv, value, -1, -1);
3620 }
3621
3622
3623 static int i802_set_preamble(void *priv, int value)
3624 {
3625 return i802_set_bss(priv, -1, value, -1);
3626 }
3627
3628
3629 static int i802_set_short_slot_time(void *priv, int value)
3630 {
3631 return i802_set_bss(priv, -1, -1, value);
3632 }
3633
3634
3635 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3636 {
3637 switch (type) {
3638 case HOSTAPD_IF_VLAN:
3639 return NL80211_IFTYPE_AP_VLAN;
3640 case HOSTAPD_IF_WDS:
3641 return NL80211_IFTYPE_WDS;
3642 }
3643 return -1;
3644 }
3645
3646
3647 static int i802_if_add(const char *iface, void *priv,
3648 enum hostapd_driver_if_type type, char *ifname,
3649 const u8 *addr)
3650 {
3651 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3652 return -1;
3653 return 0;
3654 }
3655
3656
3657 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3658 char *ifname, const u8 *addr)
3659 {
3660 /* unused at the moment */
3661 return -1;
3662 }
3663
3664
3665 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3666 const char *ifname, const u8 *addr)
3667 {
3668 nl80211_remove_iface(priv, if_nametoindex(ifname));
3669 return 0;
3670 }
3671
3672
3673 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3674 const char *ifname, int vlan_id)
3675 {
3676 struct wpa_driver_nl80211_data *drv = priv;
3677 struct nl_msg *msg;
3678
3679 msg = nlmsg_alloc();
3680 if (!msg)
3681 return -ENOMEM;
3682
3683 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3684 0, NL80211_CMD_SET_STATION, 0);
3685
3686 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3687 if_nametoindex(drv->ifname));
3688 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3689 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3690 if_nametoindex(ifname));
3691
3692 return send_and_recv_msgs(drv, msg, NULL, NULL);
3693 nla_put_failure:
3694 return -ENOBUFS;
3695 }
3696
3697
3698 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3699 u8 *buf, size_t len,
3700 struct hostapd_frame_info *hfi,
3701 enum ieee80211_msg_type msg_type)
3702 {
3703 struct hostapd_iface *iface = drv->hapd->iface;
3704 struct ieee80211_hdr *hdr;
3705 u16 fc, type, stype;
3706 size_t data_len = len;
3707 struct hostapd_data *hapd = NULL;
3708 int broadcast_bssid = 0;
3709 size_t i;
3710 u8 *bssid;
3711
3712 /*
3713 * PS-Poll frames are 16 bytes. All other frames are
3714 * 24 bytes or longer.
3715 */
3716 if (len < 16)
3717 return;
3718
3719 hdr = (struct ieee80211_hdr *) buf;
3720 fc = le_to_host16(hdr->frame_control);
3721
3722 type = WLAN_FC_GET_TYPE(fc);
3723 stype = WLAN_FC_GET_STYPE(fc);
3724
3725 switch (type) {
3726 case WLAN_FC_TYPE_DATA:
3727 if (len < 24)
3728 return;
3729 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3730 case WLAN_FC_TODS:
3731 bssid = hdr->addr1;
3732 break;
3733 case WLAN_FC_FROMDS:
3734 bssid = hdr->addr2;
3735 break;
3736 default:
3737 /* discard */
3738 return;
3739 }
3740 break;
3741 case WLAN_FC_TYPE_CTRL:
3742 /* discard non-ps-poll frames */
3743 if (stype != WLAN_FC_STYPE_PSPOLL)
3744 return;
3745 bssid = hdr->addr1;
3746 break;
3747 case WLAN_FC_TYPE_MGMT:
3748 bssid = hdr->addr3;
3749 break;
3750 default:
3751 /* discard */
3752 return;
3753 }
3754
3755 /* find interface frame belongs to */
3756 for (i = 0; i < iface->num_bss; i++) {
3757 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3758 hapd = iface->bss[i];
3759 break;
3760 }
3761 }
3762
3763 if (hapd == NULL) {
3764 hapd = iface->bss[0];
3765
3766 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3767 bssid[2] != 0xff || bssid[3] != 0xff ||
3768 bssid[4] != 0xff || bssid[5] != 0xff) {
3769 /*
3770 * Unknown BSSID - drop frame if this is not from
3771 * passive scanning or a beacon (at least ProbeReq
3772 * frames to other APs may be allowed through RX
3773 * filtering in the wlan hw/driver)
3774 */
3775 if ((type != WLAN_FC_TYPE_MGMT ||
3776 stype != WLAN_FC_STYPE_BEACON))
3777 return;
3778 } else
3779 broadcast_bssid = 1;
3780 }
3781
3782 switch (msg_type) {
3783 case ieee80211_msg_normal:
3784 /* continue processing */
3785 break;
3786 case ieee80211_msg_tx_callback_ack:
3787 handle_tx_callback(hapd, buf, data_len, 1);
3788 return;
3789 case ieee80211_msg_tx_callback_fail:
3790 handle_tx_callback(hapd, buf, data_len, 0);
3791 return;
3792 }
3793
3794 switch (type) {
3795 case WLAN_FC_TYPE_MGMT:
3796 if (stype != WLAN_FC_STYPE_BEACON &&
3797 stype != WLAN_FC_STYPE_PROBE_REQ)
3798 wpa_printf(MSG_MSGDUMP, "MGMT");
3799 if (broadcast_bssid) {
3800 for (i = 0; i < iface->num_bss; i++)
3801 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3802 stype, hfi);
3803 } else
3804 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3805 break;
3806 case WLAN_FC_TYPE_CTRL:
3807 /* can only get here with PS-Poll frames */
3808 wpa_printf(MSG_DEBUG, "CTRL");
3809 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3810 break;
3811 case WLAN_FC_TYPE_DATA:
3812 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3813 break;
3814 }
3815 }
3816
3817
3818 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3819 {
3820 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3821 struct sockaddr_ll lladdr;
3822 unsigned char buf[3000];
3823 int len;
3824 socklen_t fromlen = sizeof(lladdr);
3825
3826 len = recvfrom(sock, buf, sizeof(buf), 0,
3827 (struct sockaddr *)&lladdr, &fromlen);
3828 if (len < 0) {
3829 perror("recv");
3830 return;
3831 }
3832
3833 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3834 struct hostapd_data *hapd;
3835 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3836 if (!hapd)
3837 return;
3838 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3839 }
3840 }
3841
3842
3843 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3844 int mode)
3845 {
3846 struct nl_msg *msg;
3847 int ret = -ENOBUFS;
3848
3849 msg = nlmsg_alloc();
3850 if (!msg)
3851 return -ENOMEM;
3852
3853 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3854 0, NL80211_CMD_SET_INTERFACE, 0);
3855 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3856 if_nametoindex(ifname));
3857 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3858
3859 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3860 if (!ret)
3861 return 0;
3862 nla_put_failure:
3863 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3864 "mode.", ifname);
3865 return ret;
3866 }
3867
3868
3869 #ifdef CONFIG_IEEE80211N
3870 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3871 int freq, u8 *ie, size_t ie_len)
3872 {
3873 struct ieee802_11_elems elems;
3874 int ht, pri_chan = 0, sec_chan = 0;
3875 struct ieee80211_ht_operation *oper;
3876 struct hostapd_neighbor_bss *nnei;
3877
3878 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3879 ht = elems.ht_capabilities || elems.ht_operation;
3880 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3881 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3882 pri_chan = oper->control_chan;
3883 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3884 if (oper->ht_param &
3885 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3886 sec_chan = pri_chan + 4;
3887 else if (oper->ht_param &
3888 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3889 sec_chan = pri_chan - 4;
3890 }
3891 }
3892
3893 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3894 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3895 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3896
3897 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3898 sizeof(struct hostapd_neighbor_bss));
3899 if (nnei == NULL)
3900 return;
3901 drv->neighbors = nnei;
3902 nnei = &nnei[drv->num_neighbors];
3903 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3904 nnei->freq = freq;
3905 nnei->ht = !!ht;
3906 nnei->pri_chan = pri_chan;
3907 nnei->sec_chan = sec_chan;
3908 drv->num_neighbors++;
3909 }
3910
3911
3912 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3913 {
3914 int divi = 1000000, i;
3915
3916 if (iwe->u.freq.e == 0) {
3917 /*
3918 * Some drivers do not report frequency, but a channel.
3919 * Try to map this to frequency by assuming they are using
3920 * IEEE 802.11b/g. But don't overwrite a previously parsed
3921 * frequency if the driver sends both frequency and channel,
3922 * since the driver may be sending an A-band channel that we
3923 * don't handle here.
3924 */
3925
3926 if (*freq)
3927 return 0;
3928
3929 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3930 *freq = 2407 + 5 * iwe->u.freq.m;
3931 return 0;
3932 } else if (iwe->u.freq.m == 14) {
3933 *freq = 2484;
3934 return 0;
3935 }
3936 }
3937
3938 if (iwe->u.freq.e > 6) {
3939 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3940 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3941 return -1;
3942 }
3943
3944 for (i = 0; i < iwe->u.freq.e; i++)
3945 divi /= 10;
3946 *freq = iwe->u.freq.m / divi;
3947 return 0;
3948 }
3949
3950
3951 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3952 size_t len)
3953 {
3954 size_t ap_num = 0;
3955 int first;
3956 struct iw_event iwe_buf, *iwe = &iwe_buf;
3957 char *pos, *end, *custom;
3958 u8 bssid[ETH_ALEN];
3959 int freq = 0;
3960 u8 *ie = NULL;
3961 size_t ie_len = 0;
3962
3963 ap_num = 0;
3964 first = 1;
3965
3966 pos = (char *) res_buf;
3967 end = (char *) res_buf + len;
3968
3969 while (pos + IW_EV_LCP_LEN <= end) {
3970 /* Event data may be unaligned, so make a local, aligned copy
3971 * before processing. */
3972 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3973 if (iwe->len <= IW_EV_LCP_LEN)
3974 break;
3975
3976 custom = pos + IW_EV_POINT_LEN;
3977 if (iwe->cmd == IWEVGENIE) {
3978 /* WE-19 removed the pointer from struct iw_point */
3979 char *dpos = (char *) &iwe_buf.u.data.length;
3980 int dlen = dpos - (char *) &iwe_buf;
3981 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3982 sizeof(struct iw_event) - dlen);
3983 } else {
3984 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3985 custom += IW_EV_POINT_OFF;
3986 }
3987
3988 switch (iwe->cmd) {
3989 case SIOCGIWAP:
3990 if (!first)
3991 i802_add_neighbor(drv, bssid, freq, ie,
3992 ie_len);
3993 first = 0;
3994 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3995 freq = 0;
3996 ie = NULL;
3997 ie_len = 0;
3998 break;
3999 case SIOCGIWFREQ:
4000 i802_get_scan_freq(iwe, &freq);
4001 break;
4002 case IWEVGENIE:
4003 if (custom + iwe->u.data.length > end) {
4004 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4005 return -1;
4006 }
4007 ie = (u8 *) custom;
4008 ie_len = iwe->u.data.length;
4009 break;
4010 }
4011
4012 pos += iwe->len;
4013 }
4014
4015 if (!first)
4016 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4017
4018 return 0;
4019 }
4020
4021
4022 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4023 {
4024 struct iwreq iwr;
4025 u8 *res_buf;
4026 size_t res_buf_len;
4027 int res;
4028
4029 res_buf_len = IW_SCAN_MAX_DATA;
4030 for (;;) {
4031 res_buf = os_malloc(res_buf_len);
4032 if (res_buf == NULL)
4033 return -1;
4034 os_memset(&iwr, 0, sizeof(iwr));
4035 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4036 iwr.u.data.pointer = res_buf;
4037 iwr.u.data.length = res_buf_len;
4038
4039 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4040 break;
4041
4042 if (errno == E2BIG && res_buf_len < 65535) {
4043 os_free(res_buf);
4044 res_buf = NULL;
4045 res_buf_len *= 2;
4046 if (res_buf_len > 65535)
4047 res_buf_len = 65535; /* 16-bit length field */
4048 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4049 "trying larger buffer (%lu bytes)",
4050 (unsigned long) res_buf_len);
4051 } else {
4052 perror("ioctl[SIOCGIWSCAN]");
4053 os_free(res_buf);
4054 return -1;
4055 }
4056 }
4057
4058 if (iwr.u.data.length > res_buf_len) {
4059 os_free(res_buf);
4060 return -1;
4061 }
4062
4063 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4064 os_free(res_buf);
4065
4066 return res;
4067 }
4068
4069
4070 static int i802_is_event_wireless_scan_complete(char *data, int len)
4071 {
4072 struct iw_event iwe_buf, *iwe = &iwe_buf;
4073 char *pos, *end;
4074
4075 pos = data;
4076 end = data + len;
4077
4078 while (pos + IW_EV_LCP_LEN <= end) {
4079 /* Event data may be unaligned, so make a local, aligned copy
4080 * before processing. */
4081 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4082 if (iwe->cmd == SIOCGIWSCAN)
4083 return 1;
4084
4085 pos += iwe->len;
4086 }
4087
4088 return 0;
4089 }
4090
4091
4092 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4093 {
4094 struct ifinfomsg *ifi;
4095 int attrlen, _nlmsg_len, rta_len;
4096 struct rtattr *attr;
4097
4098 if (len < (int) sizeof(*ifi))
4099 return 0;
4100
4101 ifi = NLMSG_DATA(h);
4102
4103 if (ifindex != ifi->ifi_index)
4104 return 0; /* event for foreign ifindex */
4105
4106 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4107
4108 attrlen = h->nlmsg_len - _nlmsg_len;
4109 if (attrlen < 0)
4110 return 0;
4111
4112 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4113
4114 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4115 while (RTA_OK(attr, attrlen)) {
4116 if (attr->rta_type == IFLA_WIRELESS &&
4117 i802_is_event_wireless_scan_complete(
4118 ((char *) attr) + rta_len,
4119 attr->rta_len - rta_len))
4120 return 1;
4121 attr = RTA_NEXT(attr, attrlen);
4122 }
4123
4124 return 0;
4125 }
4126
4127
4128 static int i802_is_scan_complete(int s, int ifindex)
4129 {
4130 char buf[1024];
4131 int left;
4132 struct nlmsghdr *h;
4133
4134 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4135 if (left < 0) {
4136 perror("recv(netlink)");
4137 return 0;
4138 }
4139
4140 h = (struct nlmsghdr *) buf;
4141 while (left >= (int) sizeof(*h)) {
4142 int len, plen;
4143
4144 len = h->nlmsg_len;
4145 plen = len - sizeof(*h);
4146 if (len > left || plen < 0) {
4147 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4148 "len=%d left=%d plen=%d",
4149 len, left, plen);
4150 break;
4151 }
4152
4153 switch (h->nlmsg_type) {
4154 case RTM_NEWLINK:
4155 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4156 return 1;
4157 break;
4158 }
4159
4160 len = NLMSG_ALIGN(len);
4161 left -= len;
4162 h = (struct nlmsghdr *) ((char *) h + len);
4163 }
4164
4165 return 0;
4166 }
4167
4168
4169 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4170 {
4171 struct iwreq iwr;
4172 int s, res, ifindex;
4173 struct sockaddr_nl local;
4174 time_t now, end;
4175 fd_set rfds;
4176 struct timeval tv;
4177
4178 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4179 "starting HT 20/40 MHz BSS");
4180
4181 /* Request a new scan */
4182 /* TODO: would be enough to scan the selected band */
4183 os_memset(&iwr, 0, sizeof(iwr));
4184 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4185 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4186 perror("ioctl[SIOCSIWSCAN]");
4187 return -1;
4188 }
4189
4190 ifindex = if_nametoindex(drv->ifname);
4191
4192 /* Wait for scan completion event or timeout */
4193 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4194 if (s < 0) {
4195 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4196 return -1;
4197 }
4198
4199 os_memset(&local, 0, sizeof(local));
4200 local.nl_family = AF_NETLINK;
4201 local.nl_groups = RTMGRP_LINK;
4202 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4203 perror("bind(netlink)");
4204 close(s);
4205 return -1;
4206 }
4207
4208 time(&end);
4209 end += 30; /* Wait at most 30 seconds for scan results */
4210 for (;;) {
4211 time(&now);
4212 tv.tv_sec = end > now ? end - now : 0;
4213 tv.tv_usec = 0;
4214 FD_ZERO(&rfds);
4215 FD_SET(s, &rfds);
4216 res = select(s + 1, &rfds, NULL, NULL, &tv);
4217 if (res < 0) {
4218 perror("select");
4219 /* Assume results are ready after 10 seconds wait */
4220 os_sleep(10, 0);
4221 break;
4222 } else if (res) {
4223 if (i802_is_scan_complete(s, ifindex)) {
4224 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4225 "completed");
4226 break;
4227 }
4228 } else {
4229 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4230 /* Assume results are ready to be read now */
4231 break;
4232 }
4233 }
4234
4235 close(s);
4236
4237 return i802_get_ht_scan_res(drv);
4238 }
4239 #endif /* CONFIG_IEEE80211N */
4240
4241
4242 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4243 {
4244 struct ifreq ifr;
4245 int ret;
4246
4247 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4248 if (drv->ioctl_sock < 0) {
4249 perror("socket[PF_INET,SOCK_DGRAM]");
4250 return -1;
4251 }
4252
4253 /* start listening for EAPOL on the default AP interface */
4254 add_ifidx(drv, if_nametoindex(drv->ifname));
4255
4256 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4257 return -1;
4258
4259 if (bssid) {
4260 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4261 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4262 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4263
4264 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4265 perror("ioctl(SIOCSIFHWADDR)");
4266 return -1;
4267 }
4268 }
4269
4270 /*
4271 * initialise generic netlink and nl80211
4272 */
4273 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4274 if (!drv->nl_cb) {
4275 printf("Failed to allocate netlink callbacks.\n");
4276 return -1;
4277 }
4278
4279 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4280 if (!drv->nl_handle) {
4281 printf("Failed to allocate netlink handle.\n");
4282 return -1;
4283 }
4284
4285 if (genl_connect(drv->nl_handle)) {
4286 printf("Failed to connect to generic netlink.\n");
4287 return -1;
4288 }
4289
4290 #ifdef CONFIG_LIBNL20
4291 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4292 printf("Failed to allocate generic netlink cache.\n");
4293 return -1;
4294 }
4295 #else /* CONFIG_LIBNL20 */
4296 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4297 if (!drv->nl_cache) {
4298 printf("Failed to allocate generic netlink cache.\n");
4299 return -1;
4300 }
4301 #endif /* CONFIG_LIBNL20 */
4302
4303 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4304 if (!drv->nl80211) {
4305 printf("nl80211 not found.\n");
4306 return -1;
4307 }
4308
4309 ret = nl_get_multicast_id(drv, "nl80211", "scan");
4310 if (ret >= 0)
4311 ret = nl_socket_add_membership(drv->nl_handle, ret);
4312 if (ret < 0) {
4313 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4314 "membership for scan events: %d (%s)",
4315 ret, strerror(-ret));
4316 }
4317
4318 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4319 if (ret >= 0)
4320 ret = nl_socket_add_membership(drv->nl_handle, ret);
4321 if (ret < 0) {
4322 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4323 "membership for mlme events: %d (%s)",
4324 ret, strerror(-ret));
4325 }
4326
4327 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4328 wpa_driver_nl80211_event_receive, drv,
4329 drv->hapd);
4330
4331 #ifdef CONFIG_IEEE80211N
4332 if (drv->ht_40mhz_scan) {
4333 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4334 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4335 i802_ht_scan(drv) ||
4336 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4337 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4338 "HT 40 MHz operations");
4339 return -1;
4340 }
4341 }
4342 #endif /* CONFIG_IEEE80211N */
4343
4344 /* Initialise a monitor interface */
4345 if (nl80211_create_monitor_interface(drv))
4346 return -1;
4347
4348 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4349 goto fail1;
4350
4351 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4352 goto fail1;
4353
4354 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4355 if (drv->eapol_sock < 0) {
4356 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4357 goto fail1;
4358 }
4359
4360 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4361 {
4362 printf("Could not register read socket for eapol\n");
4363 return -1;
4364 }
4365
4366 memset(&ifr, 0, sizeof(ifr));
4367 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4368 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4369 perror("ioctl(SIOCGIFHWADDR)");
4370 goto fail1;
4371 }
4372
4373 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4374 printf("Invalid HW-addr family 0x%04x\n",
4375 ifr.ifr_hwaddr.sa_family);
4376 goto fail1;
4377 }
4378 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4379
4380 return 0;
4381
4382 fail1:
4383 nl80211_remove_iface(drv, drv->monitor_ifidx);
4384 return -1;
4385 }
4386
4387
4388 static int i802_get_inact_sec(void *priv, const u8 *addr)
4389 {
4390 struct hostap_sta_driver_data data;
4391 int ret;
4392
4393 data.inactive_msec = (unsigned long) -1;
4394 ret = i802_read_sta_data(priv, &data, addr);
4395 if (ret || data.inactive_msec == (unsigned long) -1)
4396 return -1;
4397 return data.inactive_msec / 1000;
4398 }
4399
4400
4401 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4402 {
4403 #if 0
4404 /* TODO */
4405 #endif
4406 return 0;
4407 }
4408
4409
4410 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4411 {
4412 struct wpa_driver_nl80211_data *drv = priv;
4413 struct ieee80211_mgmt mgmt;
4414
4415 memset(&mgmt, 0, sizeof(mgmt));
4416 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4417 WLAN_FC_STYPE_DEAUTH);
4418 memcpy(mgmt.da, addr, ETH_ALEN);
4419 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4420 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4421 mgmt.u.deauth.reason_code = host_to_le16(reason);
4422 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4423 IEEE80211_HDRLEN +
4424 sizeof(mgmt.u.deauth));
4425 }
4426
4427
4428 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4429 {
4430 struct wpa_driver_nl80211_data *drv = priv;
4431 struct ieee80211_mgmt mgmt;
4432
4433 memset(&mgmt, 0, sizeof(mgmt));
4434 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4435 WLAN_FC_STYPE_DISASSOC);
4436 memcpy(mgmt.da, addr, ETH_ALEN);
4437 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4438 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4439 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4440 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4441 IEEE80211_HDRLEN +
4442 sizeof(mgmt.u.disassoc));
4443 }
4444
4445
4446 static const struct hostapd_neighbor_bss *
4447 i802_get_neighbor_bss(void *priv, size_t *num)
4448 {
4449 struct wpa_driver_nl80211_data *drv = priv;
4450 *num = drv->num_neighbors;
4451 return drv->neighbors;
4452 }
4453
4454
4455 static void *i802_init(struct hostapd_data *hapd,
4456 struct wpa_init_params *params)
4457 {
4458 struct wpa_driver_nl80211_data *drv;
4459 size_t i;
4460
4461 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4462 if (drv == NULL) {
4463 printf("Could not allocate memory for i802 driver data\n");
4464 return NULL;
4465 }
4466
4467 drv->hapd = hapd;
4468 memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4469 memcpy(drv->bss.ifname, params->ifname, sizeof(drv->bss.ifname));
4470 drv->ifindex = if_nametoindex(drv->ifname);
4471
4472 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4473 drv->if_indices = drv->default_if_indices;
4474 for (i = 0; i < params->num_bridge; i++) {
4475 if (params->bridge[i])
4476 add_ifidx(drv, if_nametoindex(params->bridge[i]));
4477 }
4478 drv->ht_40mhz_scan = params->ht_40mhz_scan;
4479
4480 if (i802_init_sockets(drv, params->bssid))
4481 goto failed;
4482
4483 return drv;
4484
4485 failed:
4486 free(drv);
4487 return NULL;
4488 }
4489
4490
4491 static void i802_deinit(void *priv)
4492 {
4493 struct wpa_driver_nl80211_data *drv = priv;
4494 struct i802_bss *bss, *prev;
4495
4496 if (drv->last_freq_ht) {
4497 /* Clear HT flags from the driver */
4498 struct hostapd_freq_params freq;
4499 os_memset(&freq, 0, sizeof(freq));
4500 freq.freq = drv->last_freq;
4501 i802_set_freq(priv, &freq);
4502 }
4503
4504 i802_del_beacon(drv);
4505
4506 /* remove monitor interface */
4507 nl80211_remove_iface(drv, drv->monitor_ifidx);
4508
4509 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4510
4511 if (drv->monitor_sock >= 0) {
4512 eloop_unregister_read_sock(drv->monitor_sock);
4513 close(drv->monitor_sock);
4514 }
4515 if (drv->ioctl_sock >= 0)
4516 close(drv->ioctl_sock);
4517 if (drv->eapol_sock >= 0) {
4518 eloop_unregister_read_sock(drv->eapol_sock);
4519 close(drv->eapol_sock);
4520 }
4521
4522 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4523 genl_family_put(drv->nl80211);
4524 nl_cache_free(drv->nl_cache);
4525 nl_handle_destroy(drv->nl_handle);
4526 nl_cb_put(drv->nl_cb);
4527
4528 if (drv->if_indices != drv->default_if_indices)
4529 free(drv->if_indices);
4530
4531 os_free(drv->neighbors);
4532
4533 bss = drv->bss.next;
4534 while (bss) {
4535 prev = bss;
4536 bss = bss->next;
4537 os_free(bss);
4538 }
4539
4540 free(drv);
4541 }
4542
4543 #endif /* HOSTAPD */
4544
4545
4546 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4547 .name = "nl80211",
4548 .desc = "Linux nl80211/cfg80211",
4549 .get_bssid = wpa_driver_nl80211_get_bssid,
4550 .get_ssid = wpa_driver_nl80211_get_ssid,
4551 .set_key = wpa_driver_nl80211_set_key,
4552 .scan2 = wpa_driver_nl80211_scan,
4553 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4554 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4555 .disassociate = wpa_driver_nl80211_disassociate,
4556 .authenticate = wpa_driver_nl80211_authenticate,
4557 .associate = wpa_driver_nl80211_associate,
4558 .init = wpa_driver_nl80211_init,
4559 .deinit = wpa_driver_nl80211_deinit,
4560 .get_capa = wpa_driver_nl80211_get_capa,
4561 .set_operstate = wpa_driver_nl80211_set_operstate,
4562 .set_country = wpa_driver_nl80211_set_country,
4563 #ifdef CONFIG_AP
4564 .set_beacon = wpa_driver_nl80211_set_beacon,
4565 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4566 .send_mlme = wpa_driver_nl80211_send_mlme,
4567 #endif /* CONFIG_AP */
4568 #if defined(CONFIG_AP) || defined(HOSTAPD)
4569 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4570 #endif /* CONFIG_AP || HOSTAPD */
4571 #ifdef HOSTAPD
4572 .hapd_init = i802_init,
4573 .hapd_deinit = i802_deinit,
4574 .hapd_set_key = i802_set_key,
4575 .get_seqnum = i802_get_seqnum,
4576 .flush = i802_flush,
4577 .read_sta_data = i802_read_sta_data,
4578 .hapd_send_eapol = i802_send_eapol,
4579 .sta_set_flags = i802_sta_set_flags,
4580 .sta_deauth = i802_sta_deauth,
4581 .sta_disassoc = i802_sta_disassoc,
4582 .sta_remove = i802_sta_remove,
4583 .sta_add = i802_sta_add,
4584 .get_inact_sec = i802_get_inact_sec,
4585 .sta_clear_stats = i802_sta_clear_stats,
4586 .set_freq = i802_set_freq,
4587 .set_rts = i802_set_rts,
4588 .set_frag = i802_set_frag,
4589 .set_retry = i802_set_retry,
4590 .set_rate_sets = i802_set_rate_sets,
4591 .hapd_set_beacon = i802_set_beacon,
4592 .hapd_set_beacon_int = i802_set_beacon_int,
4593 .set_cts_protect = i802_set_cts_protect,
4594 .set_preamble = i802_set_preamble,
4595 .set_short_slot_time = i802_set_short_slot_time,
4596 .set_tx_queue_params = i802_set_tx_queue_params,
4597 .bss_add = i802_bss_add,
4598 .bss_remove = i802_bss_remove,
4599 .if_add = i802_if_add,
4600 .if_update = i802_if_update,
4601 .if_remove = i802_if_remove,
4602 .set_sta_vlan = i802_set_sta_vlan,
4603 .get_neighbor_bss = i802_get_neighbor_bss,
4604 #endif /* HOSTAPD */
4605 };
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