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nl80211: Share monitor mode filtering and reading functions
[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/config.h"
58 #include "../../hostapd/hw_features.h"
59 #include "../../hostapd/mlme.h"
60 #include "../../hostapd/sta_flags.h"
61 #include "ieee802_11_common.h"
62
63 #ifdef CONFIG_LIBNL20
64 /* libnl 2.0 compatibility code */
65 #define nl_handle_alloc_cb nl_socket_alloc_cb
66 #define nl_handle_destroy nl_socket_free
67 #endif /* CONFIG_LIBNL20 */
68
69 #endif /* HOSTAPD */
70
71
72 #ifndef IFF_LOWER_UP
73 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
74 #endif
75 #ifndef IFF_DORMANT
76 #define IFF_DORMANT 0x20000 /* driver signals dormant */
77 #endif
78
79 #ifndef IF_OPER_DORMANT
80 #define IF_OPER_DORMANT 5
81 #endif
82 #ifndef IF_OPER_UP
83 #define IF_OPER_UP 6
84 #endif
85
86 enum ieee80211_msg_type {
87 ieee80211_msg_normal = 0,
88 ieee80211_msg_tx_callback_ack = 1,
89 ieee80211_msg_tx_callback_fail = 2,
90 };
91
92 struct i802_bss {
93 struct i802_bss *next;
94 char ifname[IFNAMSIZ + 1];
95 unsigned int beacon_set:1;
96 };
97
98 struct wpa_driver_nl80211_data {
99 void *ctx;
100 int link_event_sock;
101 int ioctl_sock; /* socket for ioctl() use */
102 char ifname[IFNAMSIZ + 1];
103 int ifindex;
104 int if_removed;
105 struct wpa_driver_capa capa;
106 int has_capability;
107
108 int operstate;
109
110 int scan_complete_events;
111
112 struct nl_handle *nl_handle;
113 struct nl_cache *nl_cache;
114 struct nl_cb *nl_cb;
115 struct genl_family *nl80211;
116
117 u8 bssid[ETH_ALEN];
118 int associated;
119 u8 ssid[32];
120 size_t ssid_len;
121
122 #ifdef CONFIG_AP
123 int beacon_int;
124 unsigned int beacon_set:1;
125 int monitor_sock;
126 int monitor_ifidx;
127 #endif /* CONFIG_AP */
128
129 #ifdef HOSTAPD
130 struct hostapd_data *hapd;
131
132 int eapol_sock; /* socket for EAPOL frames */
133 int monitor_sock; /* socket for monitor */
134 int monitor_ifidx;
135
136 int default_if_indices[16];
137 int *if_indices;
138 int num_if_indices;
139
140 int beacon_int;
141 struct i802_bss bss;
142 unsigned int ht_40mhz_scan:1;
143
144 int last_freq;
145 int last_freq_ht;
146 struct hostapd_neighbor_bss *neighbors;
147 size_t num_neighbors;
148 #endif /* HOSTAPD */
149 };
150
151
152 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
153 void *timeout_ctx);
154 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
155 int mode);
156 static int
157 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
158
159 #ifdef CONFIG_AP
160 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
161 int ifidx);
162 #endif /* CONFIG_AP */
163
164 #ifdef HOSTAPD
165 static void handle_frame(struct wpa_driver_nl80211_data *drv,
166 u8 *buf, size_t len,
167 struct hostapd_frame_info *hfi,
168 enum ieee80211_msg_type msg_type);
169 #endif /* HOSTAPD */
170
171
172 /* nl80211 code */
173 static int ack_handler(struct nl_msg *msg, void *arg)
174 {
175 int *err = arg;
176 *err = 0;
177 return NL_STOP;
178 }
179
180 static int finish_handler(struct nl_msg *msg, void *arg)
181 {
182 int *ret = arg;
183 *ret = 0;
184 return NL_SKIP;
185 }
186
187 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
188 void *arg)
189 {
190 int *ret = arg;
191 *ret = err->error;
192 return NL_SKIP;
193 }
194
195
196 static int no_seq_check(struct nl_msg *msg, void *arg)
197 {
198 return NL_OK;
199 }
200
201
202 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
203 struct nl_msg *msg,
204 int (*valid_handler)(struct nl_msg *, void *),
205 void *valid_data)
206 {
207 struct nl_cb *cb;
208 int err = -ENOMEM;
209
210 cb = nl_cb_clone(drv->nl_cb);
211 if (!cb)
212 goto out;
213
214 err = nl_send_auto_complete(drv->nl_handle, msg);
215 if (err < 0)
216 goto out;
217
218 err = 1;
219
220 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
221 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
222 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
223
224 if (valid_handler)
225 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
226 valid_handler, valid_data);
227
228 while (err > 0)
229 nl_recvmsgs(drv->nl_handle, cb);
230 out:
231 nl_cb_put(cb);
232 nlmsg_free(msg);
233 return err;
234 }
235
236
237 struct family_data {
238 const char *group;
239 int id;
240 };
241
242
243 static int family_handler(struct nl_msg *msg, void *arg)
244 {
245 struct family_data *res = arg;
246 struct nlattr *tb[CTRL_ATTR_MAX + 1];
247 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
248 struct nlattr *mcgrp;
249 int i;
250
251 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
252 genlmsg_attrlen(gnlh, 0), NULL);
253 if (!tb[CTRL_ATTR_MCAST_GROUPS])
254 return NL_SKIP;
255
256 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
257 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
258 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
259 nla_len(mcgrp), NULL);
260 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
261 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
262 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
263 res->group,
264 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
265 continue;
266 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
267 break;
268 };
269
270 return NL_SKIP;
271 }
272
273
274 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
275 const char *family, const char *group)
276 {
277 struct nl_msg *msg;
278 int ret = -1;
279 struct family_data res = { group, -ENOENT };
280
281 msg = nlmsg_alloc();
282 if (!msg)
283 return -ENOMEM;
284 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
285 0, 0, CTRL_CMD_GETFAMILY, 0);
286 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
287
288 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
289 msg = NULL;
290 if (ret == 0)
291 ret = res.id;
292
293 nla_put_failure:
294 nlmsg_free(msg);
295 return ret;
296 }
297
298
299 static int wpa_driver_nl80211_send_oper_ifla(
300 struct wpa_driver_nl80211_data *drv,
301 int linkmode, int operstate)
302 {
303 struct {
304 struct nlmsghdr hdr;
305 struct ifinfomsg ifinfo;
306 char opts[16];
307 } req;
308 struct rtattr *rta;
309 static int nl_seq;
310 ssize_t ret;
311
312 os_memset(&req, 0, sizeof(req));
313
314 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
315 req.hdr.nlmsg_type = RTM_SETLINK;
316 req.hdr.nlmsg_flags = NLM_F_REQUEST;
317 req.hdr.nlmsg_seq = ++nl_seq;
318 req.hdr.nlmsg_pid = 0;
319
320 req.ifinfo.ifi_family = AF_UNSPEC;
321 req.ifinfo.ifi_type = 0;
322 req.ifinfo.ifi_index = drv->ifindex;
323 req.ifinfo.ifi_flags = 0;
324 req.ifinfo.ifi_change = 0;
325
326 if (linkmode != -1) {
327 rta = (struct rtattr *)
328 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
329 rta->rta_type = IFLA_LINKMODE;
330 rta->rta_len = RTA_LENGTH(sizeof(char));
331 *((char *) RTA_DATA(rta)) = linkmode;
332 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
333 RTA_LENGTH(sizeof(char));
334 }
335 if (operstate != -1) {
336 rta = (struct rtattr *)
337 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
338 rta->rta_type = IFLA_OPERSTATE;
339 rta->rta_len = RTA_LENGTH(sizeof(char));
340 *((char *) RTA_DATA(rta)) = operstate;
341 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
342 RTA_LENGTH(sizeof(char));
343 }
344
345 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
346 linkmode, operstate);
347
348 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
349 if (ret < 0) {
350 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
351 "%s (assume operstate is not supported)",
352 strerror(errno));
353 }
354
355 return ret < 0 ? -1 : 0;
356 }
357
358
359 static int wpa_driver_nl80211_set_auth_param(
360 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
361 {
362 struct iwreq iwr;
363 int ret = 0;
364
365 os_memset(&iwr, 0, sizeof(iwr));
366 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
367 iwr.u.param.flags = idx & IW_AUTH_INDEX;
368 iwr.u.param.value = value;
369
370 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
371 if (errno != EOPNOTSUPP) {
372 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
373 "value 0x%x) failed: %s)",
374 idx, value, strerror(errno));
375 }
376 ret = errno == EOPNOTSUPP ? -2 : -1;
377 }
378
379 return ret;
380 }
381
382
383 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
384 {
385 struct wpa_driver_nl80211_data *drv = priv;
386 if (!drv->associated)
387 return -1;
388 os_memcpy(bssid, drv->bssid, ETH_ALEN);
389 return 0;
390 }
391
392
393 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
394 {
395 struct wpa_driver_nl80211_data *drv = priv;
396 if (!drv->associated)
397 return -1;
398 os_memcpy(ssid, drv->ssid, drv->ssid_len);
399 return drv->ssid_len;
400 }
401
402
403 #ifndef HOSTAPD
404 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
405 void *ctx, char *buf, size_t len,
406 int del)
407 {
408 union wpa_event_data event;
409
410 os_memset(&event, 0, sizeof(event));
411 if (len > sizeof(event.interface_status.ifname))
412 len = sizeof(event.interface_status.ifname) - 1;
413 os_memcpy(event.interface_status.ifname, buf, len);
414 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
415 EVENT_INTERFACE_ADDED;
416
417 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
418 del ? "DEL" : "NEW",
419 event.interface_status.ifname,
420 del ? "removed" : "added");
421
422 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
423 if (del)
424 drv->if_removed = 1;
425 else
426 drv->if_removed = 0;
427 }
428
429 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
430 }
431
432
433 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
434 struct nlmsghdr *h)
435 {
436 struct ifinfomsg *ifi;
437 int attrlen, _nlmsg_len, rta_len;
438 struct rtattr *attr;
439
440 ifi = NLMSG_DATA(h);
441
442 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
443
444 attrlen = h->nlmsg_len - _nlmsg_len;
445 if (attrlen < 0)
446 return 0;
447
448 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
449
450 rta_len = RTA_ALIGN(sizeof(struct rtattr));
451 while (RTA_OK(attr, attrlen)) {
452 if (attr->rta_type == IFLA_IFNAME) {
453 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
454 == 0)
455 return 1;
456 else
457 break;
458 }
459 attr = RTA_NEXT(attr, attrlen);
460 }
461
462 return 0;
463 }
464
465
466 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
467 int ifindex, struct nlmsghdr *h)
468 {
469 if (drv->ifindex == ifindex)
470 return 1;
471
472 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
473 drv->ifindex = if_nametoindex(drv->ifname);
474 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
475 "interface");
476 wpa_driver_nl80211_finish_drv_init(drv);
477 return 1;
478 }
479
480 return 0;
481 }
482
483
484 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
485 void *ctx, struct nlmsghdr *h,
486 size_t len)
487 {
488 struct ifinfomsg *ifi;
489 int attrlen, _nlmsg_len, rta_len;
490 struct rtattr * attr;
491
492 if (len < sizeof(*ifi))
493 return;
494
495 ifi = NLMSG_DATA(h);
496
497 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
498 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
499 ifi->ifi_index);
500 return;
501 }
502
503 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
504 "(%s%s%s%s)",
505 drv->operstate, ifi->ifi_flags,
506 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
507 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
508 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
509 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
510 /*
511 * Some drivers send the association event before the operup event--in
512 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
513 * fails. This will hit us when wpa_supplicant does not need to do
514 * IEEE 802.1X authentication
515 */
516 if (drv->operstate == 1 &&
517 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
518 !(ifi->ifi_flags & IFF_RUNNING))
519 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
520
521 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
522
523 attrlen = h->nlmsg_len - _nlmsg_len;
524 if (attrlen < 0)
525 return;
526
527 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
528
529 rta_len = RTA_ALIGN(sizeof(struct rtattr));
530 while (RTA_OK(attr, attrlen)) {
531 if (attr->rta_type == IFLA_IFNAME) {
532 wpa_driver_nl80211_event_link(
533 drv, ctx,
534 ((char *) attr) + rta_len,
535 attr->rta_len - rta_len, 0);
536 }
537 attr = RTA_NEXT(attr, attrlen);
538 }
539 }
540
541
542 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
543 void *ctx, struct nlmsghdr *h,
544 size_t len)
545 {
546 struct ifinfomsg *ifi;
547 int attrlen, _nlmsg_len, rta_len;
548 struct rtattr * attr;
549
550 if (len < sizeof(*ifi))
551 return;
552
553 ifi = NLMSG_DATA(h);
554
555 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
556
557 attrlen = h->nlmsg_len - _nlmsg_len;
558 if (attrlen < 0)
559 return;
560
561 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
562
563 rta_len = RTA_ALIGN(sizeof(struct rtattr));
564 while (RTA_OK(attr, attrlen)) {
565 if (attr->rta_type == IFLA_IFNAME) {
566 wpa_driver_nl80211_event_link(
567 drv, ctx,
568 ((char *) attr) + rta_len,
569 attr->rta_len - rta_len, 1);
570 }
571 attr = RTA_NEXT(attr, attrlen);
572 }
573 }
574
575
576 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
577 void *sock_ctx)
578 {
579 char buf[8192];
580 int left;
581 struct sockaddr_nl from;
582 socklen_t fromlen;
583 struct nlmsghdr *h;
584 int max_events = 10;
585
586 try_again:
587 fromlen = sizeof(from);
588 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
589 (struct sockaddr *) &from, &fromlen);
590 if (left < 0) {
591 if (errno != EINTR && errno != EAGAIN)
592 perror("recvfrom(netlink)");
593 return;
594 }
595
596 h = (struct nlmsghdr *) buf;
597 while (left >= (int) sizeof(*h)) {
598 int len, plen;
599
600 len = h->nlmsg_len;
601 plen = len - sizeof(*h);
602 if (len > left || plen < 0) {
603 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
604 "len=%d left=%d plen=%d",
605 len, left, plen);
606 break;
607 }
608
609 switch (h->nlmsg_type) {
610 case RTM_NEWLINK:
611 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
612 h, plen);
613 break;
614 case RTM_DELLINK:
615 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
616 h, plen);
617 break;
618 }
619
620 len = NLMSG_ALIGN(len);
621 left -= len;
622 h = (struct nlmsghdr *) ((char *) h + len);
623 }
624
625 if (left > 0) {
626 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
627 "message", left);
628 }
629
630 if (--max_events > 0) {
631 /*
632 * Try to receive all events in one eloop call in order to
633 * limit race condition on cases where AssocInfo event, Assoc
634 * event, and EAPOL frames are received more or less at the
635 * same time. We want to process the event messages first
636 * before starting EAPOL processing.
637 */
638 goto try_again;
639 }
640 }
641
642
643 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
644 const u8 *frame, size_t len)
645 {
646 const struct ieee80211_mgmt *mgmt;
647 union wpa_event_data event;
648
649 mgmt = (const struct ieee80211_mgmt *) frame;
650 if (len < 24 + sizeof(mgmt->u.auth)) {
651 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
652 "frame");
653 return;
654 }
655
656 os_memset(&event, 0, sizeof(event));
657 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
658 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
659 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
660 if (len > 24 + sizeof(mgmt->u.auth)) {
661 event.auth.ies = mgmt->u.auth.variable;
662 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
663 }
664
665 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
666 }
667
668
669 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
670 const u8 *frame, size_t len)
671 {
672 const struct ieee80211_mgmt *mgmt;
673 union wpa_event_data event;
674 u16 status;
675
676 mgmt = (const struct ieee80211_mgmt *) frame;
677 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
678 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
679 "frame");
680 return;
681 }
682
683 status = le_to_host16(mgmt->u.assoc_resp.status_code);
684 if (status != WLAN_STATUS_SUCCESS) {
685 os_memset(&event, 0, sizeof(event));
686 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
687 event.assoc_reject.resp_ies =
688 (u8 *) mgmt->u.assoc_resp.variable;
689 event.assoc_reject.resp_ies_len =
690 len - 24 - sizeof(mgmt->u.assoc_resp);
691 }
692 event.assoc_reject.status_code = status;
693
694 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
695 return;
696 }
697
698 drv->associated = 1;
699 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
700
701 os_memset(&event, 0, sizeof(event));
702 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
703 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
704 event.assoc_info.resp_ies_len =
705 len - 24 - sizeof(mgmt->u.assoc_resp);
706 }
707
708 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
709 }
710
711
712 static void mlme_event(struct wpa_driver_nl80211_data *drv,
713 enum nl80211_commands cmd, struct nlattr *frame)
714 {
715 if (frame == NULL) {
716 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
717 "data", cmd);
718 return;
719 }
720
721 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
722 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
723 nla_data(frame), nla_len(frame));
724
725 switch (cmd) {
726 case NL80211_CMD_AUTHENTICATE:
727 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
728 break;
729 case NL80211_CMD_ASSOCIATE:
730 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
731 break;
732 case NL80211_CMD_DEAUTHENTICATE:
733 drv->associated = 0;
734 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
735 break;
736 case NL80211_CMD_DISASSOCIATE:
737 drv->associated = 0;
738 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
739 break;
740 default:
741 break;
742 }
743 }
744
745 #endif /* HOSTAPD */
746
747
748 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
749 struct nlattr *tb[])
750 {
751 #ifdef HOSTAPD
752 if (tb[NL80211_ATTR_MAC])
753 hostapd_michael_mic_failure(drv->hapd,
754 nla_data(tb[NL80211_ATTR_MAC]));
755 #else /* HOSTAPD */
756 union wpa_event_data data;
757
758 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
759 os_memset(&data, 0, sizeof(data));
760 if (tb[NL80211_ATTR_MAC]) {
761 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
762 nla_data(tb[NL80211_ATTR_MAC]),
763 nla_len(tb[NL80211_ATTR_MAC]));
764 }
765 if (tb[NL80211_ATTR_KEY_SEQ]) {
766 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
767 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
768 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
769 }
770 if (tb[NL80211_ATTR_KEY_TYPE]) {
771 enum nl80211_key_type key_type =
772 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
773 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
774 if (key_type == NL80211_KEYTYPE_PAIRWISE)
775 data.michael_mic_failure.unicast = 1;
776 } else
777 data.michael_mic_failure.unicast = 1;
778
779 if (tb[NL80211_ATTR_KEY_IDX]) {
780 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
781 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
782 }
783
784 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
785 #endif /* HOSTAPD */
786 }
787
788
789 static int process_event(struct nl_msg *msg, void *arg)
790 {
791 struct wpa_driver_nl80211_data *drv = arg;
792 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
793 struct nlattr *tb[NL80211_ATTR_MAX + 1];
794
795 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
796 genlmsg_attrlen(gnlh, 0), NULL);
797
798 if (tb[NL80211_ATTR_IFINDEX]) {
799 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
800 if (ifindex != drv->ifindex) {
801 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
802 " for foreign interface (ifindex %d)",
803 gnlh->cmd, ifindex);
804 return NL_SKIP;
805 }
806 }
807
808 switch (gnlh->cmd) {
809 #ifndef HOSTAPD
810 case NL80211_CMD_NEW_SCAN_RESULTS:
811 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
812 drv->scan_complete_events = 1;
813 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
814 drv->ctx);
815 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
816 break;
817 case NL80211_CMD_SCAN_ABORTED:
818 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
819 /*
820 * Need to indicate that scan results are available in order
821 * not to make wpa_supplicant stop its scanning.
822 */
823 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
824 drv->ctx);
825 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
826 break;
827 case NL80211_CMD_AUTHENTICATE:
828 case NL80211_CMD_ASSOCIATE:
829 case NL80211_CMD_DEAUTHENTICATE:
830 case NL80211_CMD_DISASSOCIATE:
831 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
832 break;
833 #endif /* HOSTAPD */
834 case NL80211_CMD_MICHAEL_MIC_FAILURE:
835 mlme_event_michael_mic_failure(drv, tb);
836 break;
837 default:
838 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
839 "(cmd=%d)", gnlh->cmd);
840 break;
841 }
842
843 return NL_SKIP;
844 }
845
846
847 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
848 void *sock_ctx)
849 {
850 struct nl_cb *cb;
851 struct wpa_driver_nl80211_data *drv = eloop_ctx;
852
853 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
854
855 cb = nl_cb_clone(drv->nl_cb);
856 if (!cb)
857 return;
858 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
859 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
860 nl_recvmsgs(drv->nl_handle, cb);
861 nl_cb_put(cb);
862 }
863
864
865 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
866 const char *ifname, int *flags)
867 {
868 struct ifreq ifr;
869
870 os_memset(&ifr, 0, sizeof(ifr));
871 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
872 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
873 perror("ioctl[SIOCGIFFLAGS]");
874 return -1;
875 }
876 *flags = ifr.ifr_flags & 0xffff;
877 return 0;
878 }
879
880
881 /**
882 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
883 * @drv: driver_nl80211 private data
884 * @flags: Pointer to returned flags value
885 * Returns: 0 on success, -1 on failure
886 */
887 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
888 int *flags)
889 {
890 return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
891 }
892
893
894 static int wpa_driver_nl80211_set_ifflags_ifname(
895 struct wpa_driver_nl80211_data *drv,
896 const char *ifname, int flags)
897 {
898 struct ifreq ifr;
899
900 os_memset(&ifr, 0, sizeof(ifr));
901 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
902 ifr.ifr_flags = flags & 0xffff;
903 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
904 perror("SIOCSIFFLAGS");
905 return -1;
906 }
907 return 0;
908 }
909
910
911 /**
912 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
913 * @drv: driver_nl80211 private data
914 * @flags: New value for flags
915 * Returns: 0 on success, -1 on failure
916 */
917 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
918 int flags)
919 {
920 return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
921 }
922
923
924 /**
925 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
926 * @priv: driver_nl80211 private data
927 * @alpha2_arg: country to which to switch to
928 * Returns: 0 on success, -1 on failure
929 *
930 * This asks nl80211 to set the regulatory domain for given
931 * country ISO / IEC alpha2.
932 */
933 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
934 {
935 struct wpa_driver_nl80211_data *drv = priv;
936 char alpha2[3];
937 struct nl_msg *msg;
938
939 msg = nlmsg_alloc();
940 if (!msg)
941 return -ENOMEM;
942
943 alpha2[0] = alpha2_arg[0];
944 alpha2[1] = alpha2_arg[1];
945 alpha2[2] = '\0';
946
947 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
948 0, NL80211_CMD_REQ_SET_REG, 0);
949
950 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
951 if (send_and_recv_msgs(drv, msg, NULL, NULL))
952 return -EINVAL;
953 return 0;
954 nla_put_failure:
955 return -EINVAL;
956 }
957
958
959 struct wiphy_info_data {
960 int max_scan_ssids;
961 int ap_supported;
962 };
963
964
965 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
966 {
967 struct nlattr *tb[NL80211_ATTR_MAX + 1];
968 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
969 struct wiphy_info_data *info = arg;
970
971 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
972 genlmsg_attrlen(gnlh, 0), NULL);
973
974 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
975 info->max_scan_ssids =
976 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
977
978 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
979 struct nlattr *nl_mode;
980 int i;
981 nla_for_each_nested(nl_mode,
982 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
983 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
984 info->ap_supported = 1;
985 break;
986 }
987 }
988 }
989
990 return NL_SKIP;
991 }
992
993
994 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
995 struct wiphy_info_data *info)
996 {
997 struct nl_msg *msg;
998
999 os_memset(info, 0, sizeof(*info));
1000 msg = nlmsg_alloc();
1001 if (!msg)
1002 return -1;
1003
1004 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1005 0, NL80211_CMD_GET_WIPHY, 0);
1006
1007 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1008
1009 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1010 return 0;
1011 msg = NULL;
1012 nla_put_failure:
1013 nlmsg_free(msg);
1014 return -1;
1015 }
1016
1017
1018 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1019 {
1020 struct wiphy_info_data info;
1021 if (wpa_driver_nl80211_get_info(drv, &info))
1022 return;
1023 drv->has_capability = 1;
1024 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1025 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1026 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1027 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1028 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1029 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1030 WPA_DRIVER_CAPA_ENC_WEP104 |
1031 WPA_DRIVER_CAPA_ENC_TKIP |
1032 WPA_DRIVER_CAPA_ENC_CCMP;
1033
1034 drv->capa.max_scan_ssids = info.max_scan_ssids;
1035 if (info.ap_supported)
1036 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1037 }
1038
1039
1040 /**
1041 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1042 * @ctx: context to be used when calling wpa_supplicant functions,
1043 * e.g., wpa_supplicant_event()
1044 * @ifname: interface name, e.g., wlan0
1045 * Returns: Pointer to private data, %NULL on failure
1046 */
1047 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1048 {
1049 int s, ret;
1050 struct sockaddr_nl local;
1051 struct wpa_driver_nl80211_data *drv;
1052
1053 drv = os_zalloc(sizeof(*drv));
1054 if (drv == NULL)
1055 return NULL;
1056 drv->ctx = ctx;
1057 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1058 #ifdef CONFIG_AP
1059 drv->monitor_ifidx = -1;
1060 drv->monitor_sock = -1;
1061 #endif /* CONFIG_AP */
1062
1063 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1064 if (drv->nl_cb == NULL) {
1065 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1066 "callbacks");
1067 goto err1;
1068 }
1069
1070 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1071 if (drv->nl_handle == NULL) {
1072 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1073 "callbacks");
1074 goto err2;
1075 }
1076
1077 if (genl_connect(drv->nl_handle)) {
1078 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1079 "netlink");
1080 goto err3;
1081 }
1082
1083 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1084 if (drv->nl_cache == NULL) {
1085 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1086 "netlink cache");
1087 goto err3;
1088 }
1089
1090 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1091 if (drv->nl80211 == NULL) {
1092 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1093 "found");
1094 goto err4;
1095 }
1096
1097 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1098 if (ret >= 0)
1099 ret = nl_socket_add_membership(drv->nl_handle, ret);
1100 if (ret < 0) {
1101 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1102 "membership for scan events: %d (%s)",
1103 ret, strerror(-ret));
1104 goto err4;
1105 }
1106
1107 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1108 if (ret >= 0)
1109 ret = nl_socket_add_membership(drv->nl_handle, ret);
1110 if (ret < 0) {
1111 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1112 "membership for mlme events: %d (%s)",
1113 ret, strerror(-ret));
1114 goto err4;
1115 }
1116 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1117
1118 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1119 wpa_driver_nl80211_event_receive, drv, ctx);
1120
1121 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1122 if (drv->ioctl_sock < 0) {
1123 perror("socket(PF_INET,SOCK_DGRAM)");
1124 goto err5;
1125 }
1126
1127 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1128 if (s < 0) {
1129 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1130 goto err6;
1131 }
1132
1133 os_memset(&local, 0, sizeof(local));
1134 local.nl_family = AF_NETLINK;
1135 local.nl_groups = RTMGRP_LINK;
1136 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1137 perror("bind(netlink)");
1138 close(s);
1139 goto err6;
1140 }
1141
1142 #ifndef HOSTAPD
1143 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1144 ctx);
1145 #endif /* HOSTAPD */
1146 drv->link_event_sock = s;
1147
1148 if (wpa_driver_nl80211_finish_drv_init(drv))
1149 goto err7;
1150
1151 return drv;
1152
1153 err7:
1154 eloop_unregister_read_sock(drv->link_event_sock);
1155 close(drv->link_event_sock);
1156 err6:
1157 close(drv->ioctl_sock);
1158 err5:
1159 genl_family_put(drv->nl80211);
1160 err4:
1161 nl_cache_free(drv->nl_cache);
1162 err3:
1163 nl_handle_destroy(drv->nl_handle);
1164 err2:
1165 nl_cb_put(drv->nl_cb);
1166 err1:
1167 os_free(drv);
1168 return NULL;
1169 }
1170
1171
1172 static int
1173 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1174 {
1175 int flags;
1176
1177 drv->ifindex = if_nametoindex(drv->ifname);
1178
1179 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1180 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1181 "use managed mode");
1182 }
1183
1184 if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1185 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1186 drv->ifname);
1187 return -1;
1188 }
1189 if (!(flags & IFF_UP)) {
1190 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1191 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1192 "UP", drv->ifname);
1193 return -1;
1194 }
1195 }
1196
1197 wpa_driver_nl80211_capa(drv);
1198
1199 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1200
1201 return 0;
1202 }
1203
1204
1205 /**
1206 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1207 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1208 *
1209 * Shut down driver interface and processing of driver events. Free
1210 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1211 */
1212 static void wpa_driver_nl80211_deinit(void *priv)
1213 {
1214 struct wpa_driver_nl80211_data *drv = priv;
1215 int flags;
1216
1217 #ifdef CONFIG_AP
1218 if (drv->monitor_ifidx >= 0)
1219 nl80211_remove_iface(drv, drv->monitor_ifidx);
1220 if (drv->monitor_sock >= 0) {
1221 eloop_unregister_read_sock(drv->monitor_sock);
1222 close(drv->monitor_sock);
1223 }
1224 #endif /* CONFIG_AP */
1225
1226 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1227
1228 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1229
1230 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1231
1232 eloop_unregister_read_sock(drv->link_event_sock);
1233
1234 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1235 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1236 wpa_driver_nl80211_set_mode(drv, 0);
1237
1238 close(drv->link_event_sock);
1239 close(drv->ioctl_sock);
1240
1241 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1242 genl_family_put(drv->nl80211);
1243 nl_cache_free(drv->nl_cache);
1244 nl_handle_destroy(drv->nl_handle);
1245 nl_cb_put(drv->nl_cb);
1246
1247 os_free(drv);
1248 }
1249
1250
1251 /**
1252 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1253 * @eloop_ctx: Unused
1254 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1255 *
1256 * This function can be used as registered timeout when starting a scan to
1257 * generate a scan completed event if the driver does not report this.
1258 */
1259 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1260 {
1261 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1262 #ifndef HOSTAPD
1263 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1264 #endif /* HOSTAPD */
1265 }
1266
1267
1268 /**
1269 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1270 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1271 * @params: Scan parameters
1272 * Returns: 0 on success, -1 on failure
1273 */
1274 static int wpa_driver_nl80211_scan(void *priv,
1275 struct wpa_driver_scan_params *params)
1276 {
1277 struct wpa_driver_nl80211_data *drv = priv;
1278 int ret = 0, timeout;
1279 struct nl_msg *msg, *ssids, *freqs;
1280 size_t i;
1281
1282 msg = nlmsg_alloc();
1283 ssids = nlmsg_alloc();
1284 freqs = nlmsg_alloc();
1285 if (!msg || !ssids || !freqs) {
1286 nlmsg_free(msg);
1287 nlmsg_free(ssids);
1288 nlmsg_free(freqs);
1289 return -1;
1290 }
1291
1292 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1293 NL80211_CMD_TRIGGER_SCAN, 0);
1294
1295 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1296
1297 for (i = 0; i < params->num_ssids; i++) {
1298 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1299 params->ssids[i].ssid);
1300 }
1301 if (params->num_ssids)
1302 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1303
1304 if (params->extra_ies) {
1305 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1306 params->extra_ies);
1307 }
1308
1309 if (params->freqs) {
1310 for (i = 0; params->freqs[i]; i++)
1311 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1312 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1313 }
1314
1315 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1316 msg = NULL;
1317 if (ret) {
1318 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1319 "(%s)", ret, strerror(-ret));
1320 goto nla_put_failure;
1321 }
1322
1323 /* Not all drivers generate "scan completed" wireless event, so try to
1324 * read results after a timeout. */
1325 timeout = 10;
1326 if (drv->scan_complete_events) {
1327 /*
1328 * The driver seems to deliver events to notify when scan is
1329 * complete, so use longer timeout to avoid race conditions
1330 * with scanning and following association request.
1331 */
1332 timeout = 30;
1333 }
1334 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1335 "seconds", ret, timeout);
1336 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1337 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1338 drv, drv->ctx);
1339
1340 nla_put_failure:
1341 nlmsg_free(ssids);
1342 nlmsg_free(msg);
1343 nlmsg_free(freqs);
1344 return ret;
1345 }
1346
1347
1348 static int bss_info_handler(struct nl_msg *msg, void *arg)
1349 {
1350 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1351 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1352 struct nlattr *bss[NL80211_BSS_MAX + 1];
1353 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1354 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1355 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1356 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1357 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1358 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1359 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1360 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1361 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1362 };
1363 struct wpa_scan_results *res = arg;
1364 struct wpa_scan_res **tmp;
1365 struct wpa_scan_res *r;
1366 const u8 *ie;
1367 size_t ie_len;
1368
1369 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1370 genlmsg_attrlen(gnlh, 0), NULL);
1371 if (!tb[NL80211_ATTR_BSS])
1372 return NL_SKIP;
1373 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1374 bss_policy))
1375 return NL_SKIP;
1376 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1377 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1378 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1379 } else {
1380 ie = NULL;
1381 ie_len = 0;
1382 }
1383
1384 r = os_zalloc(sizeof(*r) + ie_len);
1385 if (r == NULL)
1386 return NL_SKIP;
1387 if (bss[NL80211_BSS_BSSID])
1388 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1389 ETH_ALEN);
1390 if (bss[NL80211_BSS_FREQUENCY])
1391 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1392 if (bss[NL80211_BSS_BEACON_INTERVAL])
1393 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1394 if (bss[NL80211_BSS_CAPABILITY])
1395 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1396 r->flags |= WPA_SCAN_NOISE_INVALID;
1397 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1398 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1399 r->level /= 100; /* mBm to dBm */
1400 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1401 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1402 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1403 r->flags |= WPA_SCAN_LEVEL_INVALID;
1404 } else
1405 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1406 if (bss[NL80211_BSS_TSF])
1407 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1408 r->ie_len = ie_len;
1409 if (ie)
1410 os_memcpy(r + 1, ie, ie_len);
1411
1412 tmp = os_realloc(res->res,
1413 (res->num + 1) * sizeof(struct wpa_scan_res *));
1414 if (tmp == NULL) {
1415 os_free(r);
1416 return NL_SKIP;
1417 }
1418 tmp[res->num++] = r;
1419 res->res = tmp;
1420
1421 return NL_SKIP;
1422 }
1423
1424
1425 /**
1426 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1427 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1428 * Returns: Scan results on success, -1 on failure
1429 */
1430 static struct wpa_scan_results *
1431 wpa_driver_nl80211_get_scan_results(void *priv)
1432 {
1433 struct wpa_driver_nl80211_data *drv = priv;
1434 struct nl_msg *msg;
1435 struct wpa_scan_results *res;
1436 int ret;
1437
1438 res = os_zalloc(sizeof(*res));
1439 if (res == NULL)
1440 return 0;
1441 msg = nlmsg_alloc();
1442 if (!msg)
1443 goto nla_put_failure;
1444
1445 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1446 NL80211_CMD_GET_SCAN, 0);
1447 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1448
1449 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1450 msg = NULL;
1451 if (ret == 0) {
1452 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1453 (unsigned long) res->num);
1454 return res;
1455 }
1456 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1457 "(%s)", ret, strerror(-ret));
1458 nla_put_failure:
1459 nlmsg_free(msg);
1460 wpa_scan_results_free(res);
1461 return NULL;
1462 }
1463
1464
1465 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1466 wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1467 const u8 *seq, size_t seq_len,
1468 const u8 *key, size_t key_len)
1469 {
1470 struct nl_msg *msg;
1471 int ret;
1472
1473 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1474 "set_tx=%d seq_len=%lu key_len=%lu",
1475 __func__, ifindex, alg, addr, key_idx, set_tx,
1476 (unsigned long) seq_len, (unsigned long) key_len);
1477
1478 msg = nlmsg_alloc();
1479 if (!msg)
1480 return -ENOMEM;
1481
1482 if (alg == WPA_ALG_NONE) {
1483 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1484 0, NL80211_CMD_DEL_KEY, 0);
1485 } else {
1486 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1487 0, NL80211_CMD_NEW_KEY, 0);
1488 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1489 switch (alg) {
1490 case WPA_ALG_WEP:
1491 if (key_len == 5)
1492 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1493 0x000FAC01);
1494 else
1495 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1496 0x000FAC05);
1497 break;
1498 case WPA_ALG_TKIP:
1499 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1500 break;
1501 case WPA_ALG_CCMP:
1502 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1503 break;
1504 case WPA_ALG_IGTK:
1505 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1506 break;
1507 default:
1508 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1509 "algorithm %d", __func__, alg);
1510 nlmsg_free(msg);
1511 return -1;
1512 }
1513 }
1514
1515 if (seq)
1516 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1517
1518 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1519 {
1520 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1521 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1522 }
1523 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1524 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1525
1526 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1527 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1528 ret = 0;
1529 if (ret)
1530 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1531 ret, strerror(-ret));
1532
1533 /*
1534 * If we failed or don't need to set the default TX key (below),
1535 * we're done here.
1536 */
1537 if (ret || !set_tx || alg == WPA_ALG_NONE)
1538 return ret;
1539 #ifdef HOSTAPD /* FIX: is this needed? */
1540 if (addr)
1541 return ret;
1542 #endif /* HOSTAPD */
1543
1544 msg = nlmsg_alloc();
1545 if (!msg)
1546 return -ENOMEM;
1547
1548 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1549 0, NL80211_CMD_SET_KEY, 0);
1550 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1551 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1552 if (alg == WPA_ALG_IGTK)
1553 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1554 else
1555 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1556
1557 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1558 if (ret == -ENOENT)
1559 ret = 0;
1560 if (ret)
1561 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1562 "err=%d %s)", ret, strerror(-ret));
1563 return ret;
1564
1565 nla_put_failure:
1566 return -ENOBUFS;
1567 }
1568
1569
1570 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1571 const u8 *addr, int key_idx,
1572 int set_tx, const u8 *seq,
1573 size_t seq_len,
1574 const u8 *key, size_t key_len)
1575 {
1576 struct wpa_driver_nl80211_data *drv = priv;
1577 return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1578 seq_len, key, key_len);
1579 }
1580
1581
1582 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1583 const u8 *addr, int cmd, u16 reason_code)
1584 {
1585 int ret = -1;
1586 struct nl_msg *msg;
1587
1588 msg = nlmsg_alloc();
1589 if (!msg)
1590 return -1;
1591
1592 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1593
1594 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1595 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1596 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1597
1598 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1599 msg = NULL;
1600 if (ret) {
1601 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1602 "(%s)", ret, strerror(-ret));
1603 goto nla_put_failure;
1604 }
1605 ret = 0;
1606
1607 nla_put_failure:
1608 nlmsg_free(msg);
1609 return ret;
1610 }
1611
1612
1613 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1614 int reason_code)
1615 {
1616 struct wpa_driver_nl80211_data *drv = priv;
1617 wpa_printf(MSG_DEBUG, "%s", __func__);
1618 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1619 reason_code);
1620 }
1621
1622
1623 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1624 int reason_code)
1625 {
1626 struct wpa_driver_nl80211_data *drv = priv;
1627 wpa_printf(MSG_DEBUG, "%s", __func__);
1628 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1629 reason_code);
1630 }
1631
1632
1633 static int wpa_driver_nl80211_authenticate(
1634 void *priv, struct wpa_driver_auth_params *params)
1635 {
1636 struct wpa_driver_nl80211_data *drv = priv;
1637 int ret = -1, i;
1638 struct nl_msg *msg;
1639 enum nl80211_auth_type type;
1640
1641 drv->associated = 0;
1642
1643 msg = nlmsg_alloc();
1644 if (!msg)
1645 return -1;
1646
1647 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1648 drv->ifindex);
1649
1650 for (i = 0; i < 4; i++) {
1651 if (!params->wep_key[i])
1652 continue;
1653 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1654 i == params->wep_tx_keyidx, NULL, 0,
1655 params->wep_key[i],
1656 params->wep_key_len[i]);
1657 }
1658
1659 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1660 NL80211_CMD_AUTHENTICATE, 0);
1661
1662 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1663 if (params->bssid) {
1664 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
1665 MAC2STR(params->bssid));
1666 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1667 }
1668 if (params->freq) {
1669 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
1670 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1671 }
1672 if (params->ssid) {
1673 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
1674 params->ssid, params->ssid_len);
1675 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1676 params->ssid);
1677 }
1678 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
1679 if (params->ie)
1680 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1681 /*
1682 * TODO: if multiple auth_alg options enabled, try them one by one if
1683 * the AP rejects authentication due to unknown auth alg
1684 */
1685 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1686 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1687 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1688 type = NL80211_AUTHTYPE_SHARED_KEY;
1689 else if (params->auth_alg & AUTH_ALG_LEAP)
1690 type = NL80211_AUTHTYPE_NETWORK_EAP;
1691 else if (params->auth_alg & AUTH_ALG_FT)
1692 type = NL80211_AUTHTYPE_FT;
1693 else
1694 goto nla_put_failure;
1695 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
1696 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1697
1698 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1699 msg = NULL;
1700 if (ret) {
1701 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1702 "(%s)", ret, strerror(-ret));
1703 goto nla_put_failure;
1704 }
1705 ret = 0;
1706 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1707 "successfully");
1708
1709 nla_put_failure:
1710 nlmsg_free(msg);
1711 return ret;
1712 }
1713
1714
1715 #if defined(CONFIG_AP) || defined(HOSTAPD)
1716
1717 struct phy_info_arg {
1718 u16 *num_modes;
1719 struct hostapd_hw_modes *modes;
1720 };
1721
1722 static int phy_info_handler(struct nl_msg *msg, void *arg)
1723 {
1724 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1725 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1726 struct phy_info_arg *phy_info = arg;
1727
1728 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1729
1730 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1731 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1732 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1733 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1734 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1735 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1736 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1737 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1738 };
1739
1740 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1741 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1742 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1743 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1744 };
1745
1746 struct nlattr *nl_band;
1747 struct nlattr *nl_freq;
1748 struct nlattr *nl_rate;
1749 int rem_band, rem_freq, rem_rate;
1750 struct hostapd_hw_modes *mode;
1751 int idx, mode_is_set;
1752
1753 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1754 genlmsg_attrlen(gnlh, 0), NULL);
1755
1756 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1757 return NL_SKIP;
1758
1759 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1760 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1761 if (!mode)
1762 return NL_SKIP;
1763 phy_info->modes = mode;
1764
1765 mode_is_set = 0;
1766
1767 mode = &phy_info->modes[*(phy_info->num_modes)];
1768 memset(mode, 0, sizeof(*mode));
1769 *(phy_info->num_modes) += 1;
1770
1771 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1772 nla_len(nl_band), NULL);
1773
1774 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1775 mode->ht_capab = nla_get_u16(
1776 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1777 }
1778
1779 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1780 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1781 nla_len(nl_freq), freq_policy);
1782 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1783 continue;
1784 mode->num_channels++;
1785 }
1786
1787 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1788 if (!mode->channels)
1789 return NL_SKIP;
1790
1791 idx = 0;
1792
1793 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1794 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1795 nla_len(nl_freq), freq_policy);
1796 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1797 continue;
1798
1799 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1800 mode->channels[idx].flag = 0;
1801
1802 if (!mode_is_set) {
1803 /* crude heuristic */
1804 if (mode->channels[idx].freq < 4000)
1805 mode->mode = HOSTAPD_MODE_IEEE80211B;
1806 else
1807 mode->mode = HOSTAPD_MODE_IEEE80211A;
1808 mode_is_set = 1;
1809 }
1810
1811 /* crude heuristic */
1812 if (mode->channels[idx].freq < 4000)
1813 if (mode->channels[idx].freq == 2484)
1814 mode->channels[idx].chan = 14;
1815 else
1816 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1817 else
1818 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1819
1820 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1821 mode->channels[idx].flag |=
1822 HOSTAPD_CHAN_DISABLED;
1823 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1824 mode->channels[idx].flag |=
1825 HOSTAPD_CHAN_PASSIVE_SCAN;
1826 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1827 mode->channels[idx].flag |=
1828 HOSTAPD_CHAN_NO_IBSS;
1829 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1830 mode->channels[idx].flag |=
1831 HOSTAPD_CHAN_RADAR;
1832
1833 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1834 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1835 mode->channels[idx].max_tx_power =
1836 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1837
1838 idx++;
1839 }
1840
1841 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1842 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1843 nla_len(nl_rate), rate_policy);
1844 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1845 continue;
1846 mode->num_rates++;
1847 }
1848
1849 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1850 if (!mode->rates)
1851 return NL_SKIP;
1852
1853 idx = 0;
1854
1855 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1856 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1857 nla_len(nl_rate), rate_policy);
1858 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1859 continue;
1860 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1861
1862 /* crude heuristic */
1863 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1864 mode->rates[idx].rate > 200)
1865 mode->mode = HOSTAPD_MODE_IEEE80211G;
1866
1867 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1868 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1869
1870 idx++;
1871 }
1872 }
1873
1874 return NL_SKIP;
1875 }
1876
1877 static struct hostapd_hw_modes *
1878 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1879 {
1880 u16 m;
1881 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1882 int i, mode11g_idx = -1;
1883
1884 /* If only 802.11g mode is included, use it to construct matching
1885 * 802.11b mode data. */
1886
1887 for (m = 0; m < *num_modes; m++) {
1888 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1889 return modes; /* 802.11b already included */
1890 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1891 mode11g_idx = m;
1892 }
1893
1894 if (mode11g_idx < 0)
1895 return modes; /* 2.4 GHz band not supported at all */
1896
1897 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1898 if (nmodes == NULL)
1899 return modes; /* Could not add 802.11b mode */
1900
1901 mode = &nmodes[*num_modes];
1902 os_memset(mode, 0, sizeof(*mode));
1903 (*num_modes)++;
1904 modes = nmodes;
1905
1906 mode->mode = HOSTAPD_MODE_IEEE80211B;
1907
1908 mode11g = &modes[mode11g_idx];
1909 mode->num_channels = mode11g->num_channels;
1910 mode->channels = os_malloc(mode11g->num_channels *
1911 sizeof(struct hostapd_channel_data));
1912 if (mode->channels == NULL) {
1913 (*num_modes)--;
1914 return modes; /* Could not add 802.11b mode */
1915 }
1916 os_memcpy(mode->channels, mode11g->channels,
1917 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1918
1919 mode->num_rates = 0;
1920 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1921 if (mode->rates == NULL) {
1922 os_free(mode->channels);
1923 (*num_modes)--;
1924 return modes; /* Could not add 802.11b mode */
1925 }
1926
1927 for (i = 0; i < mode11g->num_rates; i++) {
1928 if (mode11g->rates[i].rate > 110 ||
1929 mode11g->rates[i].flags &
1930 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1931 continue;
1932 mode->rates[mode->num_rates] = mode11g->rates[i];
1933 mode->num_rates++;
1934 if (mode->num_rates == 4)
1935 break;
1936 }
1937
1938 if (mode->num_rates == 0) {
1939 os_free(mode->channels);
1940 os_free(mode->rates);
1941 (*num_modes)--;
1942 return modes; /* No 802.11b rates */
1943 }
1944
1945 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1946 "information");
1947
1948 return modes;
1949 }
1950
1951
1952 static struct hostapd_hw_modes *
1953 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1954 {
1955 struct wpa_driver_nl80211_data *drv = priv;
1956 struct nl_msg *msg;
1957 struct phy_info_arg result = {
1958 .num_modes = num_modes,
1959 .modes = NULL,
1960 };
1961
1962 *num_modes = 0;
1963 *flags = 0;
1964
1965 msg = nlmsg_alloc();
1966 if (!msg)
1967 return NULL;
1968
1969 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1970 0, NL80211_CMD_GET_WIPHY, 0);
1971
1972 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1973
1974 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1975 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1976 nla_put_failure:
1977 return NULL;
1978 }
1979
1980
1981 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1982 const void *data, size_t len,
1983 int encrypt)
1984 {
1985 __u8 rtap_hdr[] = {
1986 0x00, 0x00, /* radiotap version */
1987 0x0e, 0x00, /* radiotap length */
1988 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1989 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1990 0x00, /* padding */
1991 0x00, 0x00, /* RX and TX flags to indicate that */
1992 0x00, 0x00, /* this is the injected frame directly */
1993 };
1994 struct iovec iov[2] = {
1995 {
1996 .iov_base = &rtap_hdr,
1997 .iov_len = sizeof(rtap_hdr),
1998 },
1999 {
2000 .iov_base = (void *) data,
2001 .iov_len = len,
2002 }
2003 };
2004 struct msghdr msg = {
2005 .msg_name = NULL,
2006 .msg_namelen = 0,
2007 .msg_iov = iov,
2008 .msg_iovlen = 2,
2009 .msg_control = NULL,
2010 .msg_controllen = 0,
2011 .msg_flags = 0,
2012 };
2013
2014 if (encrypt)
2015 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2016
2017 return sendmsg(drv->monitor_sock, &msg, 0);
2018 }
2019
2020
2021 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2022 size_t data_len)
2023 {
2024 struct wpa_driver_nl80211_data *drv = priv;
2025 struct ieee80211_mgmt *mgmt;
2026 int do_not_encrypt = 0;
2027 u16 fc;
2028
2029 mgmt = (struct ieee80211_mgmt *) data;
2030 fc = le_to_host16(mgmt->frame_control);
2031
2032 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2033 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2034 /*
2035 * Only one of the authentication frame types is encrypted.
2036 * In order for static WEP encryption to work properly (i.e.,
2037 * to not encrypt the frame), we need to tell mac80211 about
2038 * the frames that must not be encrypted.
2039 */
2040 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2041 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2042 if (auth_alg == WLAN_AUTH_OPEN ||
2043 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2044 do_not_encrypt = 1;
2045 }
2046
2047 return wpa_driver_nl80211_send_frame(drv, data, data_len,
2048 !do_not_encrypt);
2049 }
2050
2051 #endif /* CONFIG_AP || HOSTAPD */
2052
2053
2054 #ifdef CONFIG_AP
2055
2056 static int wpa_driver_nl80211_set_beacon(void *priv,
2057 const u8 *head, size_t head_len,
2058 const u8 *tail, size_t tail_len,
2059 int dtim_period)
2060 {
2061 struct wpa_driver_nl80211_data *drv = priv;
2062 struct nl_msg *msg;
2063 u8 cmd = NL80211_CMD_NEW_BEACON;
2064 int ret;
2065
2066 msg = nlmsg_alloc();
2067 if (!msg)
2068 return -ENOMEM;
2069
2070 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2071 drv->beacon_set);
2072 if (drv->beacon_set)
2073 cmd = NL80211_CMD_SET_BEACON;
2074
2075 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2076 0, cmd, 0);
2077 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2078 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2079 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2080 if (!drv->beacon_int)
2081 drv->beacon_int = 100;
2082 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2083 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2084
2085 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2086 if (ret) {
2087 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2088 ret, strerror(-ret));
2089 } else
2090 drv->beacon_set = 1;
2091 return ret;
2092 nla_put_failure:
2093 return -ENOBUFS;
2094 }
2095
2096
2097 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2098 {
2099 struct wpa_driver_nl80211_data *drv = priv;
2100 struct nl_msg *msg;
2101
2102 drv->beacon_int = value;
2103
2104 if (!drv->beacon_set)
2105 return 0;
2106
2107 msg = nlmsg_alloc();
2108 if (!msg)
2109 return -ENOMEM;
2110
2111 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2112 "(beacon_set=%d)", value, drv->beacon_set);
2113 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2114 0, NL80211_CMD_SET_BEACON, 0);
2115 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2116
2117 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2118
2119 return send_and_recv_msgs(drv, msg, NULL, NULL);
2120 nla_put_failure:
2121 return -ENOBUFS;
2122 }
2123
2124
2125 static int wpa_driver_nl80211_set_freq2(
2126 struct wpa_driver_nl80211_data *drv,
2127 struct wpa_driver_associate_params *params)
2128 {
2129 struct nl_msg *msg;
2130 int ret;
2131
2132 msg = nlmsg_alloc();
2133 if (!msg)
2134 return -1;
2135
2136 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2137 NL80211_CMD_SET_WIPHY, 0);
2138
2139 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2140
2141 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2142
2143 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2144 if (ret == 0)
2145 return 0;
2146 wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2147 "%d (%s)", params->freq, ret, strerror(-ret));
2148 nla_put_failure:
2149 return -1;
2150 }
2151
2152
2153 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2154 int ifidx)
2155 {
2156 struct nl_msg *msg;
2157
2158 msg = nlmsg_alloc();
2159 if (!msg)
2160 goto nla_put_failure;
2161
2162 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2163 0, NL80211_CMD_DEL_INTERFACE, 0);
2164 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2165
2166 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2167 return;
2168 nla_put_failure:
2169 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2170 ifidx);
2171 }
2172
2173
2174 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2175 const char *ifname, enum nl80211_iftype iftype)
2176 {
2177 struct nl_msg *msg, *flags = NULL;
2178 int ifidx;
2179 int ret = -ENOBUFS;
2180
2181 msg = nlmsg_alloc();
2182 if (!msg)
2183 return -1;
2184
2185 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2186 0, NL80211_CMD_NEW_INTERFACE, 0);
2187 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2188 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2189 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2190
2191 if (iftype == NL80211_IFTYPE_MONITOR) {
2192 int err;
2193
2194 flags = nlmsg_alloc();
2195 if (!flags)
2196 goto nla_put_failure;
2197
2198 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2199
2200 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2201
2202 nlmsg_free(flags);
2203
2204 if (err)
2205 goto nla_put_failure;
2206 }
2207
2208 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2209 if (ret) {
2210 nla_put_failure:
2211 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2212 ifname);
2213 return ret;
2214 }
2215
2216 ifidx = if_nametoindex(ifname);
2217
2218 if (ifidx <= 0)
2219 return -1;
2220
2221 return ifidx;
2222 }
2223
2224
2225 void ap_tx_status(void *ctx, const u8 *addr,
2226 const u8 *buf, size_t len, int ack);
2227 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2228 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2229 struct hostapd_frame_info *fi);
2230 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2231
2232 #endif /* CONFIG_AP */
2233
2234 #if defined(CONFIG_AP) || defined(HOSTAPD)
2235
2236 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2237 {
2238 struct ieee80211_hdr *hdr;
2239 u16 fc, type, stype;
2240
2241 hdr = (struct ieee80211_hdr *) buf;
2242 fc = le_to_host16(hdr->frame_control);
2243
2244 type = WLAN_FC_GET_TYPE(fc);
2245 stype = WLAN_FC_GET_STYPE(fc);
2246
2247 switch (type) {
2248 case WLAN_FC_TYPE_MGMT:
2249 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2250 ok ? "ACK" : "fail");
2251 #ifdef HOSTAPD
2252 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2253 #else /* HOSTAPD */
2254 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2255 #endif /* HOSTAPD */
2256 break;
2257 case WLAN_FC_TYPE_CTRL:
2258 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2259 ok ? "ACK" : "fail");
2260 break;
2261 case WLAN_FC_TYPE_DATA:
2262 #ifdef HOSTAPD
2263 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2264 #else /* HOSTAPD */
2265 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2266 #endif /* HOSTAPD */
2267 break;
2268 default:
2269 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2270 type);
2271 break;
2272 }
2273 }
2274
2275 #endif /* CONFIG_AP || HOSTAPD */
2276
2277 #ifdef CONFIG_AP
2278
2279 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2280 u8 *buf, size_t len,
2281 struct hostapd_frame_info *hfi,
2282 enum ieee80211_msg_type msg_type)
2283 {
2284 struct ieee80211_hdr *hdr;
2285 u16 fc, type, stype;
2286 size_t data_len = len;
2287
2288 /*
2289 * PS-Poll frames are 16 bytes. All other frames are
2290 * 24 bytes or longer.
2291 */
2292 if (len < 16)
2293 return;
2294
2295 hdr = (struct ieee80211_hdr *) buf;
2296 fc = le_to_host16(hdr->frame_control);
2297
2298 type = WLAN_FC_GET_TYPE(fc);
2299 stype = WLAN_FC_GET_STYPE(fc);
2300
2301 switch (type) {
2302 case WLAN_FC_TYPE_DATA:
2303 if (len < 24)
2304 return;
2305 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2306 case WLAN_FC_TODS:
2307 break;
2308 case WLAN_FC_FROMDS:
2309 break;
2310 default:
2311 /* discard */
2312 return;
2313 }
2314 break;
2315 case WLAN_FC_TYPE_CTRL:
2316 /* discard non-ps-poll frames */
2317 if (stype != WLAN_FC_STYPE_PSPOLL)
2318 return;
2319 break;
2320 case WLAN_FC_TYPE_MGMT:
2321 break;
2322 default:
2323 /* discard */
2324 return;
2325 }
2326
2327 switch (msg_type) {
2328 case ieee80211_msg_normal:
2329 /* continue processing */
2330 break;
2331 case ieee80211_msg_tx_callback_ack:
2332 handle_tx_callback(drv->ctx, buf, data_len, 1);
2333 return;
2334 case ieee80211_msg_tx_callback_fail:
2335 handle_tx_callback(drv->ctx, buf, data_len, 0);
2336 return;
2337 }
2338
2339 switch (type) {
2340 case WLAN_FC_TYPE_MGMT:
2341 if (stype != WLAN_FC_STYPE_BEACON &&
2342 stype != WLAN_FC_STYPE_PROBE_REQ)
2343 wpa_printf(MSG_MSGDUMP, "MGMT");
2344 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2345 break;
2346 case WLAN_FC_TYPE_CTRL:
2347 /* can only get here with PS-Poll frames */
2348 wpa_printf(MSG_DEBUG, "CTRL");
2349 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2350 break;
2351 case WLAN_FC_TYPE_DATA:
2352 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2353 break;
2354 }
2355 }
2356
2357 #endif /* CONFIG_AP */
2358
2359 #if defined(CONFIG_AP) || defined(HOSTAPD)
2360
2361 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2362 {
2363 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2364 int len;
2365 unsigned char buf[3000];
2366 struct ieee80211_radiotap_iterator iter;
2367 int ret;
2368 struct hostapd_frame_info hfi;
2369 int injected = 0, failed = 0, msg_type, rxflags = 0;
2370
2371 len = recv(sock, buf, sizeof(buf), 0);
2372 if (len < 0) {
2373 perror("recv");
2374 return;
2375 }
2376
2377 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2378 printf("received invalid radiotap frame\n");
2379 return;
2380 }
2381
2382 memset(&hfi, 0, sizeof(hfi));
2383
2384 while (1) {
2385 ret = ieee80211_radiotap_iterator_next(&iter);
2386 if (ret == -ENOENT)
2387 break;
2388 if (ret) {
2389 printf("received invalid radiotap frame (%d)\n", ret);
2390 return;
2391 }
2392 switch (iter.this_arg_index) {
2393 case IEEE80211_RADIOTAP_FLAGS:
2394 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2395 len -= 4;
2396 break;
2397 case IEEE80211_RADIOTAP_RX_FLAGS:
2398 rxflags = 1;
2399 break;
2400 case IEEE80211_RADIOTAP_TX_FLAGS:
2401 injected = 1;
2402 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2403 IEEE80211_RADIOTAP_F_TX_FAIL;
2404 break;
2405 case IEEE80211_RADIOTAP_DATA_RETRIES:
2406 break;
2407 case IEEE80211_RADIOTAP_CHANNEL:
2408 /* TODO convert from freq/flags to channel number
2409 hfi.channel = XXX;
2410 hfi.phytype = XXX;
2411 */
2412 break;
2413 case IEEE80211_RADIOTAP_RATE:
2414 hfi.datarate = *iter.this_arg * 5;
2415 break;
2416 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2417 hfi.ssi_signal = *iter.this_arg;
2418 break;
2419 }
2420 }
2421
2422 if (rxflags && injected)
2423 return;
2424
2425 if (!injected)
2426 msg_type = ieee80211_msg_normal;
2427 else if (failed)
2428 msg_type = ieee80211_msg_tx_callback_fail;
2429 else
2430 msg_type = ieee80211_msg_tx_callback_ack;
2431
2432 handle_frame(drv, buf + iter.max_length,
2433 len - iter.max_length, &hfi, msg_type);
2434 }
2435
2436
2437 /*
2438 * we post-process the filter code later and rewrite
2439 * this to the offset to the last instruction
2440 */
2441 #define PASS 0xFF
2442 #define FAIL 0xFE
2443
2444 static struct sock_filter msock_filter_insns[] = {
2445 /*
2446 * do a little-endian load of the radiotap length field
2447 */
2448 /* load lower byte into A */
2449 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2450 /* put it into X (== index register) */
2451 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2452 /* load upper byte into A */
2453 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2454 /* left-shift it by 8 */
2455 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2456 /* or with X */
2457 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2458 /* put result into X */
2459 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2460
2461 /*
2462 * Allow management frames through, this also gives us those
2463 * management frames that we sent ourselves with status
2464 */
2465 /* load the lower byte of the IEEE 802.11 frame control field */
2466 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2467 /* mask off frame type and version */
2468 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2469 /* accept frame if it's both 0, fall through otherwise */
2470 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2471
2472 /*
2473 * TODO: add a bit to radiotap RX flags that indicates
2474 * that the sending station is not associated, then
2475 * add a filter here that filters on our DA and that flag
2476 * to allow us to deauth frames to that bad station.
2477 *
2478 * Not a regression -- we didn't do it before either.
2479 */
2480
2481 #if 0
2482 /*
2483 * drop non-data frames, WDS frames
2484 */
2485 /* load the lower byte of the frame control field */
2486 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2487 /* mask off QoS bit */
2488 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2489 /* drop non-data frames */
2490 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2491 /* load the upper byte of the frame control field */
2492 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2493 /* mask off toDS/fromDS */
2494 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2495 /* drop WDS frames */
2496 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2497 #endif
2498
2499 /*
2500 * add header length to index
2501 */
2502 /* load the lower byte of the frame control field */
2503 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2504 /* mask off QoS bit */
2505 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
2506 /* right shift it by 6 to give 0 or 2 */
2507 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
2508 /* add data frame header length */
2509 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
2510 /* add index, was start of 802.11 header */
2511 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
2512 /* move to index, now start of LL header */
2513 BPF_STMT(BPF_MISC | BPF_TAX, 0),
2514
2515 /*
2516 * Accept empty data frames, we use those for
2517 * polling activity.
2518 */
2519 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
2520 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2521
2522 /*
2523 * Accept EAPOL frames
2524 */
2525 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
2526 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2527 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
2528 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2529
2530 /* keep these last two statements or change the code below */
2531 /* return 0 == "DROP" */
2532 BPF_STMT(BPF_RET | BPF_K, 0),
2533 /* return ~0 == "keep all" */
2534 BPF_STMT(BPF_RET | BPF_K, ~0),
2535 };
2536
2537 static struct sock_fprog msock_filter = {
2538 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2539 .filter = msock_filter_insns,
2540 };
2541
2542
2543 static int add_monitor_filter(int s)
2544 {
2545 int idx;
2546
2547 /* rewrite all PASS/FAIL jump offsets */
2548 for (idx = 0; idx < msock_filter.len; idx++) {
2549 struct sock_filter *insn = &msock_filter_insns[idx];
2550
2551 if (BPF_CLASS(insn->code) == BPF_JMP) {
2552 if (insn->code == (BPF_JMP|BPF_JA)) {
2553 if (insn->k == PASS)
2554 insn->k = msock_filter.len - idx - 2;
2555 else if (insn->k == FAIL)
2556 insn->k = msock_filter.len - idx - 3;
2557 }
2558
2559 if (insn->jt == PASS)
2560 insn->jt = msock_filter.len - idx - 2;
2561 else if (insn->jt == FAIL)
2562 insn->jt = msock_filter.len - idx - 3;
2563
2564 if (insn->jf == PASS)
2565 insn->jf = msock_filter.len - idx - 2;
2566 else if (insn->jf == FAIL)
2567 insn->jf = msock_filter.len - idx - 3;
2568 }
2569 }
2570
2571 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2572 &msock_filter, sizeof(msock_filter))) {
2573 perror("SO_ATTACH_FILTER");
2574 return -1;
2575 }
2576
2577 return 0;
2578 }
2579
2580 #endif /* CONFIG_AP || HOSTAPD */
2581
2582 #ifdef CONFIG_AP
2583
2584 static int
2585 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2586 {
2587 char buf[IFNAMSIZ];
2588 struct sockaddr_ll ll;
2589 int optval;
2590 socklen_t optlen;
2591 int flags;
2592
2593 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2594 buf[IFNAMSIZ - 1] = '\0';
2595
2596 drv->monitor_ifidx =
2597 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
2598
2599 if (drv->monitor_ifidx < 0)
2600 return -1;
2601
2602 if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0) {
2603 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
2604 buf);
2605 goto error;
2606 }
2607 if (!(flags & IFF_UP)) {
2608 if (wpa_driver_nl80211_set_ifflags_ifname(drv, buf,
2609 flags | IFF_UP) != 0)
2610 {
2611 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
2612 "UP", buf);
2613 goto error;
2614 }
2615 }
2616
2617 memset(&ll, 0, sizeof(ll));
2618 ll.sll_family = AF_PACKET;
2619 ll.sll_ifindex = drv->monitor_ifidx;
2620 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2621 if (drv->monitor_sock < 0) {
2622 perror("socket[PF_PACKET,SOCK_RAW]");
2623 goto error;
2624 }
2625
2626 if (add_monitor_filter(drv->monitor_sock)) {
2627 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2628 "interface; do filtering in user space");
2629 /* This works, but will cost in performance. */
2630 }
2631
2632 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
2633 sizeof(ll)) < 0) {
2634 perror("monitor socket bind");
2635 goto error;
2636 }
2637
2638 optlen = sizeof(optval);
2639 optval = 20;
2640 if (setsockopt
2641 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2642 perror("Failed to set socket priority");
2643 goto error;
2644 }
2645
2646 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2647 drv, NULL)) {
2648 printf("Could not register monitor read socket\n");
2649 goto error;
2650 }
2651
2652 return 0;
2653 error:
2654 nl80211_remove_iface(drv, drv->monitor_ifidx);
2655 return -1;
2656 }
2657
2658
2659 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2660 struct wpa_driver_associate_params *params)
2661 {
2662 if (drv->monitor_ifidx < 0 &&
2663 nl80211_create_monitor_interface(drv))
2664 return -1;
2665
2666 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2667 wpa_driver_nl80211_set_freq2(drv, params)) {
2668 nl80211_remove_iface(drv, drv->monitor_ifidx);
2669 drv->monitor_ifidx = -1;
2670 return -1;
2671 }
2672
2673 /* TODO: setup monitor interface (and add code somewhere to remove this
2674 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2675
2676 return 0;
2677 }
2678 #endif /* CONFIG_AP */
2679
2680
2681 static int wpa_driver_nl80211_associate(
2682 void *priv, struct wpa_driver_associate_params *params)
2683 {
2684 struct wpa_driver_nl80211_data *drv = priv;
2685 int ret = -1;
2686 struct nl_msg *msg;
2687
2688 #ifdef CONFIG_AP
2689 if (params->mode == 2)
2690 return wpa_driver_nl80211_ap(drv, params);
2691 #endif /* CONFIG_AP */
2692
2693 wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2694 params->drop_unencrypted);
2695
2696 drv->associated = 0;
2697
2698 msg = nlmsg_alloc();
2699 if (!msg)
2700 return -1;
2701
2702 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2703 drv->ifindex);
2704 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2705 NL80211_CMD_ASSOCIATE, 0);
2706
2707 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2708 if (params->bssid) {
2709 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2710 MAC2STR(params->bssid));
2711 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2712 }
2713 if (params->freq) {
2714 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2715 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2716 }
2717 if (params->ssid) {
2718 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2719 params->ssid, params->ssid_len);
2720 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2721 params->ssid);
2722 if (params->ssid_len > sizeof(drv->ssid))
2723 goto nla_put_failure;
2724 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2725 drv->ssid_len = params->ssid_len;
2726 }
2727 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2728 if (params->wpa_ie)
2729 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2730 params->wpa_ie);
2731
2732 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2733 msg = NULL;
2734 if (ret) {
2735 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2736 "(%s)", ret, strerror(-ret));
2737 goto nla_put_failure;
2738 }
2739 ret = 0;
2740 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2741 "successfully");
2742
2743 nla_put_failure:
2744 nlmsg_free(msg);
2745 return ret;
2746 }
2747
2748
2749 /**
2750 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2751 * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2752 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2753 * Returns: 0 on success, -1 on failure
2754 */
2755 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2756 int mode)
2757 {
2758 int ret = -1, flags;
2759 struct nl_msg *msg;
2760 int nlmode;
2761
2762 switch (mode) {
2763 case 0:
2764 nlmode = NL80211_IFTYPE_STATION;
2765 break;
2766 case 1:
2767 nlmode = NL80211_IFTYPE_ADHOC;
2768 break;
2769 case 2:
2770 nlmode = NL80211_IFTYPE_AP;
2771 break;
2772 default:
2773 return -1;
2774 }
2775
2776 msg = nlmsg_alloc();
2777 if (!msg)
2778 return -1;
2779
2780 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2781 0, NL80211_CMD_SET_INTERFACE, 0);
2782 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2783 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2784
2785 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2786 if (!ret)
2787 return 0;
2788 else
2789 goto try_again;
2790
2791 nla_put_failure:
2792 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2793 ret, strerror(-ret));
2794 return -1;
2795
2796 try_again:
2797 /* mac80211 doesn't allow mode changes while the device is up, so
2798 * take the device down, try to set the mode again, and bring the
2799 * device back up.
2800 */
2801 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2802 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2803
2804 /* Try to set the mode again while the interface is down */
2805 msg = nlmsg_alloc();
2806 if (!msg)
2807 return -1;
2808
2809 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2810 0, NL80211_CMD_SET_INTERFACE, 0);
2811 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2812 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2813 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2814 if (ret) {
2815 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2816 "mode(try_again): %d (%s)",
2817 drv->ifname, ret, strerror(-ret));
2818 }
2819
2820 /* Ignore return value of get_ifflags to ensure that the device
2821 * is always up like it was before this function was called.
2822 */
2823 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2824 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2825 }
2826
2827 return ret;
2828 }
2829
2830
2831 static int wpa_driver_nl80211_get_capa(void *priv,
2832 struct wpa_driver_capa *capa)
2833 {
2834 struct wpa_driver_nl80211_data *drv = priv;
2835 if (!drv->has_capability)
2836 return -1;
2837 os_memcpy(capa, &drv->capa, sizeof(*capa));
2838 return 0;
2839 }
2840
2841
2842 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2843 {
2844 struct wpa_driver_nl80211_data *drv = priv;
2845
2846 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2847 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2848 drv->operstate = state;
2849 return wpa_driver_nl80211_send_oper_ifla(
2850 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2851 }
2852
2853
2854 #ifdef HOSTAPD
2855
2856 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2857
2858 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2859 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2860
2861
2862 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2863 const char *iface)
2864 {
2865 struct i802_bss *bss = &drv->bss;
2866 while (bss) {
2867 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2868 return bss;
2869 bss = bss->next;
2870 }
2871 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2872 return NULL;
2873 }
2874
2875
2876 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2877 {
2878 int i;
2879 int *old;
2880
2881 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2882 ifidx);
2883 for (i = 0; i < drv->num_if_indices; i++) {
2884 if (drv->if_indices[i] == 0) {
2885 drv->if_indices[i] = ifidx;
2886 return;
2887 }
2888 }
2889
2890 if (drv->if_indices != drv->default_if_indices)
2891 old = drv->if_indices;
2892 else
2893 old = NULL;
2894
2895 drv->if_indices = realloc(old,
2896 sizeof(int) * (drv->num_if_indices + 1));
2897 if (!drv->if_indices) {
2898 if (!old)
2899 drv->if_indices = drv->default_if_indices;
2900 else
2901 drv->if_indices = old;
2902 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2903 "interfaces");
2904 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2905 return;
2906 }
2907 drv->if_indices[drv->num_if_indices] = ifidx;
2908 drv->num_if_indices++;
2909 }
2910
2911
2912 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2913 {
2914 int i;
2915
2916 for (i = 0; i < drv->num_if_indices; i++) {
2917 if (drv->if_indices[i] == ifidx) {
2918 drv->if_indices[i] = 0;
2919 break;
2920 }
2921 }
2922 }
2923
2924
2925 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2926 {
2927 int i;
2928
2929 for (i = 0; i < drv->num_if_indices; i++)
2930 if (drv->if_indices[i] == ifidx)
2931 return 1;
2932
2933 return 0;
2934 }
2935
2936
2937 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
2938 const char *ifname, int dev_up)
2939 {
2940 struct ifreq ifr;
2941
2942 if (drv->ioctl_sock < 0)
2943 return -1;
2944
2945 memset(&ifr, 0, sizeof(ifr));
2946 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
2947
2948 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
2949 perror("ioctl[SIOCGIFFLAGS]");
2950 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
2951 drv->ifname);
2952 return -1;
2953 }
2954
2955 if (dev_up)
2956 ifr.ifr_flags |= IFF_UP;
2957 else
2958 ifr.ifr_flags &= ~IFF_UP;
2959
2960 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
2961 perror("ioctl[SIOCSIFFLAGS]");
2962 return -1;
2963 }
2964
2965 return 0;
2966 }
2967
2968
2969 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2970 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2971 size_t seq_len, const u8 *key, size_t key_len)
2972 {
2973 struct wpa_driver_nl80211_data *drv = priv;
2974 return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2975 set_tx, seq, seq_len, key, key_len);
2976 }
2977
2978
2979 static inline int min_int(int a, int b)
2980 {
2981 if (a < b)
2982 return a;
2983 return b;
2984 }
2985
2986
2987 static int get_key_handler(struct nl_msg *msg, void *arg)
2988 {
2989 struct nlattr *tb[NL80211_ATTR_MAX + 1];
2990 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2991
2992 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2993 genlmsg_attrlen(gnlh, 0), NULL);
2994
2995 /*
2996 * TODO: validate the key index and mac address!
2997 * Otherwise, there's a race condition as soon as
2998 * the kernel starts sending key notifications.
2999 */
3000
3001 if (tb[NL80211_ATTR_KEY_SEQ])
3002 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3003 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3004 return NL_SKIP;
3005 }
3006
3007
3008 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3009 int idx, u8 *seq)
3010 {
3011 struct wpa_driver_nl80211_data *drv = priv;
3012 struct nl_msg *msg;
3013
3014 msg = nlmsg_alloc();
3015 if (!msg)
3016 return -ENOMEM;
3017
3018 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3019 0, NL80211_CMD_GET_KEY, 0);
3020
3021 if (addr)
3022 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3023 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3024 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3025
3026 memset(seq, 0, 6);
3027
3028 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3029 nla_put_failure:
3030 return -ENOBUFS;
3031 }
3032
3033
3034 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3035 int mode)
3036 {
3037 struct wpa_driver_nl80211_data *drv = priv;
3038 struct nl_msg *msg;
3039 u8 rates[NL80211_MAX_SUPP_RATES];
3040 u8 rates_len = 0;
3041 int i;
3042
3043 msg = nlmsg_alloc();
3044 if (!msg)
3045 return -ENOMEM;
3046
3047 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3048 NL80211_CMD_SET_BSS, 0);
3049
3050 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3051 rates[rates_len++] = basic_rates[i] / 5;
3052
3053 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3054
3055 /* TODO: multi-BSS support */
3056 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3057
3058 return send_and_recv_msgs(drv, msg, NULL, NULL);
3059 nla_put_failure:
3060 return -ENOBUFS;
3061 }
3062
3063
3064 /* Set kernel driver on given frequency (MHz) */
3065 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3066 {
3067 struct wpa_driver_nl80211_data *drv = priv;
3068 struct nl_msg *msg;
3069
3070 msg = nlmsg_alloc();
3071 if (!msg)
3072 return -1;
3073
3074 drv->last_freq = freq->freq;
3075 drv->last_freq_ht = freq->ht_enabled;
3076
3077 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3078 NL80211_CMD_SET_WIPHY, 0);
3079
3080 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3081 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3082 if (freq->ht_enabled) {
3083 switch (freq->sec_channel_offset) {
3084 case -1:
3085 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3086 NL80211_CHAN_HT40MINUS);
3087 break;
3088 case 1:
3089 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3090 NL80211_CHAN_HT40PLUS);
3091 break;
3092 default:
3093 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3094 NL80211_CHAN_HT20);
3095 break;
3096 }
3097 }
3098
3099 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3100 return 0;
3101 nla_put_failure:
3102 return -1;
3103 }
3104
3105
3106 static int i802_set_rts(void *priv, int rts)
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 iwr.u.rts.value = rts;
3114 iwr.u.rts.fixed = 1;
3115
3116 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3117 perror("ioctl[SIOCSIWRTS]");
3118 return -1;
3119 }
3120
3121 return 0;
3122 }
3123
3124
3125 static int i802_set_frag(void *priv, int frag)
3126 {
3127 struct wpa_driver_nl80211_data *drv = priv;
3128 struct iwreq iwr;
3129
3130 memset(&iwr, 0, sizeof(iwr));
3131 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3132 iwr.u.frag.value = frag;
3133 iwr.u.frag.fixed = 1;
3134
3135 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3136 perror("ioctl[SIOCSIWFRAG]");
3137 return -1;
3138 }
3139
3140 return 0;
3141 }
3142
3143
3144 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3145 {
3146 struct wpa_driver_nl80211_data *drv = priv;
3147 struct iwreq iwr;
3148
3149 memset(&iwr, 0, sizeof(iwr));
3150 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3151
3152 iwr.u.retry.value = short_retry;
3153 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3154 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3155 perror("ioctl[SIOCSIWRETRY(short)]");
3156 return -1;
3157 }
3158
3159 iwr.u.retry.value = long_retry;
3160 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3161 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3162 perror("ioctl[SIOCSIWRETRY(long)]");
3163 return -1;
3164 }
3165
3166 return 0;
3167 }
3168
3169
3170 static int i802_flush(void *priv)
3171 {
3172 struct wpa_driver_nl80211_data *drv = priv;
3173 struct nl_msg *msg;
3174
3175 msg = nlmsg_alloc();
3176 if (!msg)
3177 return -1;
3178
3179 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3180 0, NL80211_CMD_DEL_STATION, 0);
3181
3182 /*
3183 * XXX: FIX! this needs to flush all VLANs too
3184 */
3185 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3186 if_nametoindex(drv->ifname));
3187
3188 return send_and_recv_msgs(drv, msg, NULL, NULL);
3189 nla_put_failure:
3190 return -ENOBUFS;
3191 }
3192
3193
3194 static int get_sta_handler(struct nl_msg *msg, void *arg)
3195 {
3196 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3197 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3198 struct hostap_sta_driver_data *data = arg;
3199 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3200 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3201 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3202 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3203 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3204 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3205 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3206 };
3207
3208 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3209 genlmsg_attrlen(gnlh, 0), NULL);
3210
3211 /*
3212 * TODO: validate the interface and mac address!
3213 * Otherwise, there's a race condition as soon as
3214 * the kernel starts sending station notifications.
3215 */
3216
3217 if (!tb[NL80211_ATTR_STA_INFO]) {
3218 wpa_printf(MSG_DEBUG, "sta stats missing!");
3219 return NL_SKIP;
3220 }
3221 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3222 tb[NL80211_ATTR_STA_INFO],
3223 stats_policy)) {
3224 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3225 return NL_SKIP;
3226 }
3227
3228 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3229 data->inactive_msec =
3230 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3231 if (stats[NL80211_STA_INFO_RX_BYTES])
3232 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3233 if (stats[NL80211_STA_INFO_TX_BYTES])
3234 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3235 if (stats[NL80211_STA_INFO_RX_PACKETS])
3236 data->rx_packets =
3237 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3238 if (stats[NL80211_STA_INFO_TX_PACKETS])
3239 data->tx_packets =
3240 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3241
3242 return NL_SKIP;
3243 }
3244
3245 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3246 const u8 *addr)
3247 {
3248 struct wpa_driver_nl80211_data *drv = priv;
3249 struct nl_msg *msg;
3250
3251 os_memset(data, 0, sizeof(*data));
3252 msg = nlmsg_alloc();
3253 if (!msg)
3254 return -ENOMEM;
3255
3256 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3257 0, NL80211_CMD_GET_STATION, 0);
3258
3259 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3260 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3261
3262 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3263 nla_put_failure:
3264 return -ENOBUFS;
3265 }
3266
3267
3268 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3269 size_t data_len, int encrypt, const u8 *own_addr)
3270 {
3271 struct wpa_driver_nl80211_data *drv = priv;
3272 struct ieee80211_hdr *hdr;
3273 size_t len;
3274 u8 *pos;
3275 int res;
3276 #if 0 /* FIX */
3277 int qos = sta->flags & WLAN_STA_WME;
3278 #else
3279 int qos = 0;
3280 #endif
3281
3282 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3283 data_len;
3284 hdr = os_zalloc(len);
3285 if (hdr == NULL) {
3286 printf("malloc() failed for i802_send_data(len=%lu)\n",
3287 (unsigned long) len);
3288 return -1;
3289 }
3290
3291 hdr->frame_control =
3292 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3293 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3294 if (encrypt)
3295 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3296 #if 0 /* To be enabled if qos determination is added above */
3297 if (qos) {
3298 hdr->frame_control |=
3299 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3300 }
3301 #endif
3302
3303 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3304 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3305 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3306 pos = (u8 *) (hdr + 1);
3307
3308 #if 0 /* To be enabled if qos determination is added above */
3309 if (qos) {
3310 /* add an empty QoS header if needed */
3311 pos[0] = 0;
3312 pos[1] = 0;
3313 pos += 2;
3314 }
3315 #endif
3316
3317 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3318 pos += sizeof(rfc1042_header);
3319 WPA_PUT_BE16(pos, ETH_P_PAE);
3320 pos += 2;
3321 memcpy(pos, data, data_len);
3322
3323 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3324 if (res < 0) {
3325 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3326 "failed: %d (%s)",
3327 (unsigned long) len, errno, strerror(errno));
3328 }
3329 free(hdr);
3330
3331 return res;
3332 }
3333
3334
3335 static int i802_sta_add(const char *ifname, void *priv,
3336 struct hostapd_sta_add_params *params)
3337 {
3338 struct wpa_driver_nl80211_data *drv = priv;
3339 struct nl_msg *msg;
3340 int ret = -ENOBUFS;
3341
3342 msg = nlmsg_alloc();
3343 if (!msg)
3344 return -ENOMEM;
3345
3346 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3347 0, NL80211_CMD_NEW_STATION, 0);
3348
3349 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3350 if_nametoindex(drv->ifname));
3351 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3352 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3353 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3354 params->supp_rates);
3355 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3356 params->listen_interval);
3357
3358 #ifdef CONFIG_IEEE80211N
3359 if (params->ht_capabilities) {
3360 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3361 params->ht_capabilities->length,
3362 &params->ht_capabilities->data);
3363 }
3364 #endif /* CONFIG_IEEE80211N */
3365
3366 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3367 if (ret)
3368 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3369 "result: %d (%s)", ret, strerror(-ret));
3370 if (ret == -EEXIST)
3371 ret = 0;
3372 nla_put_failure:
3373 return ret;
3374 }
3375
3376
3377 static int i802_sta_remove(void *priv, const u8 *addr)
3378 {
3379 struct wpa_driver_nl80211_data *drv = priv;
3380 struct nl_msg *msg;
3381 int ret;
3382
3383 msg = nlmsg_alloc();
3384 if (!msg)
3385 return -ENOMEM;
3386
3387 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3388 0, NL80211_CMD_DEL_STATION, 0);
3389
3390 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3391 if_nametoindex(drv->ifname));
3392 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3393
3394 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3395 if (ret == -ENOENT)
3396 return 0;
3397 return ret;
3398 nla_put_failure:
3399 return -ENOBUFS;
3400 }
3401
3402
3403 static int i802_sta_set_flags(void *priv, const u8 *addr,
3404 int total_flags, int flags_or, int flags_and)
3405 {
3406 struct wpa_driver_nl80211_data *drv = priv;
3407 struct nl_msg *msg, *flags = NULL;
3408
3409 msg = nlmsg_alloc();
3410 if (!msg)
3411 return -ENOMEM;
3412
3413 flags = nlmsg_alloc();
3414 if (!flags) {
3415 nlmsg_free(msg);
3416 return -ENOMEM;
3417 }
3418
3419 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3420 0, NL80211_CMD_SET_STATION, 0);
3421
3422 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3423 if_nametoindex(drv->ifname));
3424 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3425
3426 if (total_flags & WLAN_STA_AUTHORIZED)
3427 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3428
3429 if (total_flags & WLAN_STA_WMM)
3430 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3431
3432 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3433 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3434
3435 if (total_flags & WLAN_STA_MFP)
3436 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3437
3438 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3439 goto nla_put_failure;
3440
3441 nlmsg_free(flags);
3442
3443 return send_and_recv_msgs(drv, msg, NULL, NULL);
3444 nla_put_failure:
3445 nlmsg_free(flags);
3446 return -ENOBUFS;
3447 }
3448
3449
3450 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3451 int cw_min, int cw_max, int burst_time)
3452 {
3453 struct wpa_driver_nl80211_data *drv = priv;
3454 struct nl_msg *msg;
3455 struct nlattr *txq, *params;
3456
3457 msg = nlmsg_alloc();
3458 if (!msg)
3459 return -1;
3460
3461 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3462 0, NL80211_CMD_SET_WIPHY, 0);
3463
3464 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3465
3466 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3467 if (!txq)
3468 goto nla_put_failure;
3469
3470 /* We are only sending parameters for a single TXQ at a time */
3471 params = nla_nest_start(msg, 1);
3472 if (!params)
3473 goto nla_put_failure;
3474
3475 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3476 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3477 * 32 usec, so need to convert the value here. */
3478 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3479 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3480 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3481 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3482
3483 nla_nest_end(msg, params);
3484
3485 nla_nest_end(msg, txq);
3486
3487 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3488 return 0;
3489 nla_put_failure:
3490 return -1;
3491 }
3492
3493
3494 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, int ifidx)
3495 {
3496 struct nl_msg *msg;
3497
3498 /* stop listening for EAPOL on this interface */
3499 del_ifidx(drv, ifidx);
3500
3501 msg = nlmsg_alloc();
3502 if (!msg)
3503 goto nla_put_failure;
3504
3505 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3506 0, NL80211_CMD_DEL_INTERFACE, 0);
3507 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3508
3509 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3510 return;
3511 nla_put_failure:
3512 printf("Failed to remove interface.\n");
3513 }
3514
3515
3516 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3517 const char *ifname,
3518 enum nl80211_iftype iftype,
3519 const u8 *addr)
3520 {
3521 struct nl_msg *msg, *flags = NULL;
3522 int ifidx;
3523 struct ifreq ifreq;
3524 struct iwreq iwr;
3525 int ret = -ENOBUFS;
3526
3527 msg = nlmsg_alloc();
3528 if (!msg)
3529 return -1;
3530
3531 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3532 0, NL80211_CMD_NEW_INTERFACE, 0);
3533 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3534 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3535 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3536
3537 if (iftype == NL80211_IFTYPE_MONITOR) {
3538 int err;
3539
3540 flags = nlmsg_alloc();
3541 if (!flags)
3542 goto nla_put_failure;
3543
3544 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3545
3546 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3547
3548 nlmsg_free(flags);
3549
3550 if (err)
3551 goto nla_put_failure;
3552 }
3553
3554 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3555 if (ret) {
3556 nla_put_failure:
3557 printf("Failed to create interface %s.\n", ifname);
3558 return ret;
3559 }
3560
3561 ifidx = if_nametoindex(ifname);
3562
3563 if (ifidx <= 0)
3564 return -1;
3565
3566 /* start listening for EAPOL on this interface */
3567 add_ifidx(drv, ifidx);
3568
3569 if (addr) {
3570 switch (iftype) {
3571 case NL80211_IFTYPE_AP:
3572 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
3573 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
3574 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
3575
3576 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
3577 nl80211_remove_iface(drv, ifidx);
3578 return -1;
3579 }
3580 break;
3581 case NL80211_IFTYPE_WDS:
3582 memset(&iwr, 0, sizeof(iwr));
3583 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
3584 iwr.u.addr.sa_family = ARPHRD_ETHER;
3585 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
3586 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
3587 return -1;
3588 break;
3589 default:
3590 /* nothing */
3591 break;
3592 }
3593 }
3594
3595 return ifidx;
3596 }
3597
3598
3599 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3600 {
3601 struct wpa_driver_nl80211_data *drv = priv;
3602 int ifidx;
3603 struct i802_bss *bss;
3604
3605 bss = os_zalloc(sizeof(*bss));
3606 if (bss == NULL)
3607 return -1;
3608 os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3609
3610 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3611 if (ifidx < 0) {
3612 os_free(bss);
3613 return -1;
3614 }
3615 if (hostapd_set_iface_flags(priv, ifname, 1)) {
3616 nl80211_remove_iface(priv, ifidx);
3617 os_free(bss);
3618 return -1;
3619 }
3620 bss->next = drv->bss.next;
3621 drv->bss.next = bss;
3622 return 0;
3623 }
3624
3625
3626 static int i802_bss_remove(void *priv, const char *ifname)
3627 {
3628 struct wpa_driver_nl80211_data *drv = priv;
3629 struct i802_bss *bss, *prev;
3630 nl80211_remove_iface(priv, if_nametoindex(ifname));
3631 prev = &drv->bss;
3632 bss = drv->bss.next;
3633 while (bss) {
3634 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3635 prev->next = bss->next;
3636 os_free(bss);
3637 break;
3638 }
3639 prev = bss;
3640 bss = bss->next;
3641 }
3642 return 0;
3643 }
3644
3645
3646 static int i802_set_beacon(const char *iface, void *priv,
3647 const u8 *head, size_t head_len,
3648 const u8 *tail, size_t tail_len, int dtim_period)
3649 {
3650 struct wpa_driver_nl80211_data *drv = priv;
3651 struct nl_msg *msg;
3652 u8 cmd = NL80211_CMD_NEW_BEACON;
3653 int ret;
3654 struct i802_bss *bss;
3655
3656 bss = get_bss(drv, iface);
3657 if (bss == NULL)
3658 return -ENOENT;
3659
3660 msg = nlmsg_alloc();
3661 if (!msg)
3662 return -ENOMEM;
3663
3664 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3665 iface, bss->beacon_set);
3666 if (bss->beacon_set)
3667 cmd = NL80211_CMD_SET_BEACON;
3668
3669 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3670 0, cmd, 0);
3671 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3672 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3673 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3674 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3675 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3676
3677 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3678 if (!ret)
3679 bss->beacon_set = 1;
3680 return ret;
3681 nla_put_failure:
3682 return -ENOBUFS;
3683 }
3684
3685
3686 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3687 {
3688 struct nl_msg *msg;
3689
3690 msg = nlmsg_alloc();
3691 if (!msg)
3692 return -ENOMEM;
3693
3694 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3695 0, NL80211_CMD_DEL_BEACON, 0);
3696 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3697
3698 return send_and_recv_msgs(drv, msg, NULL, NULL);
3699 nla_put_failure:
3700 return -ENOBUFS;
3701 }
3702
3703
3704 static int i802_set_beacon_int(void *priv, int value)
3705 {
3706 struct wpa_driver_nl80211_data *drv = priv;
3707 struct nl_msg *msg;
3708
3709 drv->beacon_int = value;
3710
3711 if (!drv->bss.beacon_set)
3712 return 0;
3713
3714 msg = nlmsg_alloc();
3715 if (!msg)
3716 return -ENOMEM;
3717
3718 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3719 "(beacon_set=%d)", value, drv->bss.beacon_set);
3720 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3721 0, NL80211_CMD_SET_BEACON, 0);
3722 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3723
3724 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3725
3726 return send_and_recv_msgs(drv, msg, NULL, NULL);
3727 nla_put_failure:
3728 return -ENOBUFS;
3729 }
3730
3731
3732 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3733 {
3734 struct wpa_driver_nl80211_data *drv = priv;
3735 struct nl_msg *msg;
3736
3737 msg = nlmsg_alloc();
3738 if (!msg)
3739 return -ENOMEM;
3740
3741 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3742 NL80211_CMD_SET_BSS, 0);
3743
3744 if (cts >= 0)
3745 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3746 if (preamble >= 0)
3747 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3748 if (slot >= 0)
3749 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3750
3751 /* TODO: multi-BSS support */
3752 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3753
3754 return send_and_recv_msgs(drv, msg, NULL, NULL);
3755 nla_put_failure:
3756 return -ENOBUFS;
3757 }
3758
3759
3760 static int i802_set_cts_protect(void *priv, int value)
3761 {
3762 return i802_set_bss(priv, value, -1, -1);
3763 }
3764
3765
3766 static int i802_set_preamble(void *priv, int value)
3767 {
3768 return i802_set_bss(priv, -1, value, -1);
3769 }
3770
3771
3772 static int i802_set_short_slot_time(void *priv, int value)
3773 {
3774 return i802_set_bss(priv, -1, -1, value);
3775 }
3776
3777
3778 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3779 {
3780 switch (type) {
3781 case HOSTAPD_IF_VLAN:
3782 return NL80211_IFTYPE_AP_VLAN;
3783 case HOSTAPD_IF_WDS:
3784 return NL80211_IFTYPE_WDS;
3785 }
3786 return -1;
3787 }
3788
3789
3790 static int i802_if_add(const char *iface, void *priv,
3791 enum hostapd_driver_if_type type, char *ifname,
3792 const u8 *addr)
3793 {
3794 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3795 return -1;
3796 return 0;
3797 }
3798
3799
3800 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3801 char *ifname, const u8 *addr)
3802 {
3803 /* unused at the moment */
3804 return -1;
3805 }
3806
3807
3808 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3809 const char *ifname, const u8 *addr)
3810 {
3811 nl80211_remove_iface(priv, if_nametoindex(ifname));
3812 return 0;
3813 }
3814
3815
3816 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3817 const char *ifname, int vlan_id)
3818 {
3819 struct wpa_driver_nl80211_data *drv = priv;
3820 struct nl_msg *msg;
3821
3822 msg = nlmsg_alloc();
3823 if (!msg)
3824 return -ENOMEM;
3825
3826 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3827 0, NL80211_CMD_SET_STATION, 0);
3828
3829 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3830 if_nametoindex(drv->ifname));
3831 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3832 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3833 if_nametoindex(ifname));
3834
3835 return send_and_recv_msgs(drv, msg, NULL, NULL);
3836 nla_put_failure:
3837 return -ENOBUFS;
3838 }
3839
3840
3841 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3842 u8 *buf, size_t len,
3843 struct hostapd_frame_info *hfi,
3844 enum ieee80211_msg_type msg_type)
3845 {
3846 struct hostapd_iface *iface = drv->hapd->iface;
3847 struct ieee80211_hdr *hdr;
3848 u16 fc, type, stype;
3849 size_t data_len = len;
3850 struct hostapd_data *hapd = NULL;
3851 int broadcast_bssid = 0;
3852 size_t i;
3853 u8 *bssid;
3854
3855 /*
3856 * PS-Poll frames are 16 bytes. All other frames are
3857 * 24 bytes or longer.
3858 */
3859 if (len < 16)
3860 return;
3861
3862 hdr = (struct ieee80211_hdr *) buf;
3863 fc = le_to_host16(hdr->frame_control);
3864
3865 type = WLAN_FC_GET_TYPE(fc);
3866 stype = WLAN_FC_GET_STYPE(fc);
3867
3868 switch (type) {
3869 case WLAN_FC_TYPE_DATA:
3870 if (len < 24)
3871 return;
3872 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3873 case WLAN_FC_TODS:
3874 bssid = hdr->addr1;
3875 break;
3876 case WLAN_FC_FROMDS:
3877 bssid = hdr->addr2;
3878 break;
3879 default:
3880 /* discard */
3881 return;
3882 }
3883 break;
3884 case WLAN_FC_TYPE_CTRL:
3885 /* discard non-ps-poll frames */
3886 if (stype != WLAN_FC_STYPE_PSPOLL)
3887 return;
3888 bssid = hdr->addr1;
3889 break;
3890 case WLAN_FC_TYPE_MGMT:
3891 bssid = hdr->addr3;
3892 break;
3893 default:
3894 /* discard */
3895 return;
3896 }
3897
3898 /* find interface frame belongs to */
3899 for (i = 0; i < iface->num_bss; i++) {
3900 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3901 hapd = iface->bss[i];
3902 break;
3903 }
3904 }
3905
3906 if (hapd == NULL) {
3907 hapd = iface->bss[0];
3908
3909 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3910 bssid[2] != 0xff || bssid[3] != 0xff ||
3911 bssid[4] != 0xff || bssid[5] != 0xff) {
3912 /*
3913 * Unknown BSSID - drop frame if this is not from
3914 * passive scanning or a beacon (at least ProbeReq
3915 * frames to other APs may be allowed through RX
3916 * filtering in the wlan hw/driver)
3917 */
3918 if ((type != WLAN_FC_TYPE_MGMT ||
3919 stype != WLAN_FC_STYPE_BEACON))
3920 return;
3921 } else
3922 broadcast_bssid = 1;
3923 }
3924
3925 switch (msg_type) {
3926 case ieee80211_msg_normal:
3927 /* continue processing */
3928 break;
3929 case ieee80211_msg_tx_callback_ack:
3930 handle_tx_callback(hapd, buf, data_len, 1);
3931 return;
3932 case ieee80211_msg_tx_callback_fail:
3933 handle_tx_callback(hapd, buf, data_len, 0);
3934 return;
3935 }
3936
3937 switch (type) {
3938 case WLAN_FC_TYPE_MGMT:
3939 if (stype != WLAN_FC_STYPE_BEACON &&
3940 stype != WLAN_FC_STYPE_PROBE_REQ)
3941 wpa_printf(MSG_MSGDUMP, "MGMT");
3942 if (broadcast_bssid) {
3943 for (i = 0; i < iface->num_bss; i++)
3944 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3945 stype, hfi);
3946 } else
3947 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3948 break;
3949 case WLAN_FC_TYPE_CTRL:
3950 /* can only get here with PS-Poll frames */
3951 wpa_printf(MSG_DEBUG, "CTRL");
3952 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3953 break;
3954 case WLAN_FC_TYPE_DATA:
3955 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3956 break;
3957 }
3958 }
3959
3960
3961 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3962 {
3963 struct wpa_driver_nl80211_data *drv = eloop_ctx;
3964 struct sockaddr_ll lladdr;
3965 unsigned char buf[3000];
3966 int len;
3967 socklen_t fromlen = sizeof(lladdr);
3968
3969 len = recvfrom(sock, buf, sizeof(buf), 0,
3970 (struct sockaddr *)&lladdr, &fromlen);
3971 if (len < 0) {
3972 perror("recv");
3973 return;
3974 }
3975
3976 if (have_ifidx(drv, lladdr.sll_ifindex)) {
3977 struct hostapd_data *hapd;
3978 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3979 if (!hapd)
3980 return;
3981 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3982 }
3983 }
3984
3985
3986 static int nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3987 {
3988 char buf[IFNAMSIZ];
3989 struct sockaddr_ll ll;
3990 int optval;
3991 socklen_t optlen;
3992
3993 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3994 buf[IFNAMSIZ - 1] = '\0';
3995
3996 drv->monitor_ifidx =
3997 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3998
3999 if (drv->monitor_ifidx < 0)
4000 return -1;
4001
4002 if (hostapd_set_iface_flags(drv, buf, 1))
4003 goto error;
4004
4005 memset(&ll, 0, sizeof(ll));
4006 ll.sll_family = AF_PACKET;
4007 ll.sll_ifindex = drv->monitor_ifidx;
4008 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
4009 if (drv->monitor_sock < 0) {
4010 perror("socket[PF_PACKET,SOCK_RAW]");
4011 goto error;
4012 }
4013
4014 if (add_monitor_filter(drv->monitor_sock)) {
4015 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
4016 "interface; do filtering in user space");
4017 /* This works, but will cost in performance. */
4018 }
4019
4020 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
4021 sizeof(ll)) < 0) {
4022 perror("monitor socket bind");
4023 goto error;
4024 }
4025
4026 optlen = sizeof(optval);
4027 optval = 20;
4028 if (setsockopt
4029 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
4030 perror("Failed to set socket priority");
4031 goto error;
4032 }
4033
4034 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
4035 drv, NULL)) {
4036 printf("Could not register monitor read socket\n");
4037 goto error;
4038 }
4039
4040 return 0;
4041 error:
4042 nl80211_remove_iface(drv, drv->monitor_ifidx);
4043 return -1;
4044 }
4045
4046
4047 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
4048 int mode)
4049 {
4050 struct nl_msg *msg;
4051 int ret = -ENOBUFS;
4052
4053 msg = nlmsg_alloc();
4054 if (!msg)
4055 return -ENOMEM;
4056
4057 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4058 0, NL80211_CMD_SET_INTERFACE, 0);
4059 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4060 if_nametoindex(ifname));
4061 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4062
4063 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4064 if (!ret)
4065 return 0;
4066 nla_put_failure:
4067 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
4068 "mode.", ifname);
4069 return ret;
4070 }
4071
4072
4073 #ifdef CONFIG_IEEE80211N
4074 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
4075 int freq, u8 *ie, size_t ie_len)
4076 {
4077 struct ieee802_11_elems elems;
4078 int ht, pri_chan = 0, sec_chan = 0;
4079 struct ieee80211_ht_operation *oper;
4080 struct hostapd_neighbor_bss *nnei;
4081
4082 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
4083 ht = elems.ht_capabilities || elems.ht_operation;
4084 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
4085 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
4086 pri_chan = oper->control_chan;
4087 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
4088 if (oper->ht_param &
4089 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
4090 sec_chan = pri_chan + 4;
4091 else if (oper->ht_param &
4092 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
4093 sec_chan = pri_chan - 4;
4094 }
4095 }
4096
4097 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
4098 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
4099 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
4100
4101 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
4102 sizeof(struct hostapd_neighbor_bss));
4103 if (nnei == NULL)
4104 return;
4105 drv->neighbors = nnei;
4106 nnei = &nnei[drv->num_neighbors];
4107 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
4108 nnei->freq = freq;
4109 nnei->ht = !!ht;
4110 nnei->pri_chan = pri_chan;
4111 nnei->sec_chan = sec_chan;
4112 drv->num_neighbors++;
4113 }
4114
4115
4116 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
4117 {
4118 int divi = 1000000, i;
4119
4120 if (iwe->u.freq.e == 0) {
4121 /*
4122 * Some drivers do not report frequency, but a channel.
4123 * Try to map this to frequency by assuming they are using
4124 * IEEE 802.11b/g. But don't overwrite a previously parsed
4125 * frequency if the driver sends both frequency and channel,
4126 * since the driver may be sending an A-band channel that we
4127 * don't handle here.
4128 */
4129
4130 if (*freq)
4131 return 0;
4132
4133 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
4134 *freq = 2407 + 5 * iwe->u.freq.m;
4135 return 0;
4136 } else if (iwe->u.freq.m == 14) {
4137 *freq = 2484;
4138 return 0;
4139 }
4140 }
4141
4142 if (iwe->u.freq.e > 6) {
4143 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
4144 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
4145 return -1;
4146 }
4147
4148 for (i = 0; i < iwe->u.freq.e; i++)
4149 divi /= 10;
4150 *freq = iwe->u.freq.m / divi;
4151 return 0;
4152 }
4153
4154
4155 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
4156 size_t len)
4157 {
4158 size_t ap_num = 0;
4159 int first;
4160 struct iw_event iwe_buf, *iwe = &iwe_buf;
4161 char *pos, *end, *custom;
4162 u8 bssid[ETH_ALEN];
4163 int freq = 0;
4164 u8 *ie = NULL;
4165 size_t ie_len = 0;
4166
4167 ap_num = 0;
4168 first = 1;
4169
4170 pos = (char *) res_buf;
4171 end = (char *) res_buf + len;
4172
4173 while (pos + IW_EV_LCP_LEN <= end) {
4174 /* Event data may be unaligned, so make a local, aligned copy
4175 * before processing. */
4176 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4177 if (iwe->len <= IW_EV_LCP_LEN)
4178 break;
4179
4180 custom = pos + IW_EV_POINT_LEN;
4181 if (iwe->cmd == IWEVGENIE) {
4182 /* WE-19 removed the pointer from struct iw_point */
4183 char *dpos = (char *) &iwe_buf.u.data.length;
4184 int dlen = dpos - (char *) &iwe_buf;
4185 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
4186 sizeof(struct iw_event) - dlen);
4187 } else {
4188 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
4189 custom += IW_EV_POINT_OFF;
4190 }
4191
4192 switch (iwe->cmd) {
4193 case SIOCGIWAP:
4194 if (!first)
4195 i802_add_neighbor(drv, bssid, freq, ie,
4196 ie_len);
4197 first = 0;
4198 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
4199 freq = 0;
4200 ie = NULL;
4201 ie_len = 0;
4202 break;
4203 case SIOCGIWFREQ:
4204 i802_get_scan_freq(iwe, &freq);
4205 break;
4206 case IWEVGENIE:
4207 if (custom + iwe->u.data.length > end) {
4208 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4209 return -1;
4210 }
4211 ie = (u8 *) custom;
4212 ie_len = iwe->u.data.length;
4213 break;
4214 }
4215
4216 pos += iwe->len;
4217 }
4218
4219 if (!first)
4220 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4221
4222 return 0;
4223 }
4224
4225
4226 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4227 {
4228 struct iwreq iwr;
4229 u8 *res_buf;
4230 size_t res_buf_len;
4231 int res;
4232
4233 res_buf_len = IW_SCAN_MAX_DATA;
4234 for (;;) {
4235 res_buf = os_malloc(res_buf_len);
4236 if (res_buf == NULL)
4237 return -1;
4238 os_memset(&iwr, 0, sizeof(iwr));
4239 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4240 iwr.u.data.pointer = res_buf;
4241 iwr.u.data.length = res_buf_len;
4242
4243 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4244 break;
4245
4246 if (errno == E2BIG && res_buf_len < 65535) {
4247 os_free(res_buf);
4248 res_buf = NULL;
4249 res_buf_len *= 2;
4250 if (res_buf_len > 65535)
4251 res_buf_len = 65535; /* 16-bit length field */
4252 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4253 "trying larger buffer (%lu bytes)",
4254 (unsigned long) res_buf_len);
4255 } else {
4256 perror("ioctl[SIOCGIWSCAN]");
4257 os_free(res_buf);
4258 return -1;
4259 }
4260 }
4261
4262 if (iwr.u.data.length > res_buf_len) {
4263 os_free(res_buf);
4264 return -1;
4265 }
4266
4267 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4268 os_free(res_buf);
4269
4270 return res;
4271 }
4272
4273
4274 static int i802_is_event_wireless_scan_complete(char *data, int len)
4275 {
4276 struct iw_event iwe_buf, *iwe = &iwe_buf;
4277 char *pos, *end;
4278
4279 pos = data;
4280 end = data + len;
4281
4282 while (pos + IW_EV_LCP_LEN <= end) {
4283 /* Event data may be unaligned, so make a local, aligned copy
4284 * before processing. */
4285 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4286 if (iwe->cmd == SIOCGIWSCAN)
4287 return 1;
4288
4289 pos += iwe->len;
4290 }
4291
4292 return 0;
4293 }
4294
4295
4296 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4297 {
4298 struct ifinfomsg *ifi;
4299 int attrlen, _nlmsg_len, rta_len;
4300 struct rtattr *attr;
4301
4302 if (len < (int) sizeof(*ifi))
4303 return 0;
4304
4305 ifi = NLMSG_DATA(h);
4306
4307 if (ifindex != ifi->ifi_index)
4308 return 0; /* event for foreign ifindex */
4309
4310 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4311
4312 attrlen = h->nlmsg_len - _nlmsg_len;
4313 if (attrlen < 0)
4314 return 0;
4315
4316 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4317
4318 rta_len = RTA_ALIGN(sizeof(struct rtattr));
4319 while (RTA_OK(attr, attrlen)) {
4320 if (attr->rta_type == IFLA_WIRELESS &&
4321 i802_is_event_wireless_scan_complete(
4322 ((char *) attr) + rta_len,
4323 attr->rta_len - rta_len))
4324 return 1;
4325 attr = RTA_NEXT(attr, attrlen);
4326 }
4327
4328 return 0;
4329 }
4330
4331
4332 static int i802_is_scan_complete(int s, int ifindex)
4333 {
4334 char buf[1024];
4335 int left;
4336 struct nlmsghdr *h;
4337
4338 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4339 if (left < 0) {
4340 perror("recv(netlink)");
4341 return 0;
4342 }
4343
4344 h = (struct nlmsghdr *) buf;
4345 while (left >= (int) sizeof(*h)) {
4346 int len, plen;
4347
4348 len = h->nlmsg_len;
4349 plen = len - sizeof(*h);
4350 if (len > left || plen < 0) {
4351 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4352 "len=%d left=%d plen=%d",
4353 len, left, plen);
4354 break;
4355 }
4356
4357 switch (h->nlmsg_type) {
4358 case RTM_NEWLINK:
4359 if (i802_is_rtm_scan_complete(ifindex, h, plen))
4360 return 1;
4361 break;
4362 }
4363
4364 len = NLMSG_ALIGN(len);
4365 left -= len;
4366 h = (struct nlmsghdr *) ((char *) h + len);
4367 }
4368
4369 return 0;
4370 }
4371
4372
4373 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4374 {
4375 struct iwreq iwr;
4376 int s, res, ifindex;
4377 struct sockaddr_nl local;
4378 time_t now, end;
4379 fd_set rfds;
4380 struct timeval tv;
4381
4382 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4383 "starting HT 20/40 MHz BSS");
4384
4385 /* Request a new scan */
4386 /* TODO: would be enough to scan the selected band */
4387 os_memset(&iwr, 0, sizeof(iwr));
4388 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4389 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4390 perror("ioctl[SIOCSIWSCAN]");
4391 return -1;
4392 }
4393
4394 ifindex = if_nametoindex(drv->ifname);
4395
4396 /* Wait for scan completion event or timeout */
4397 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4398 if (s < 0) {
4399 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4400 return -1;
4401 }
4402
4403 os_memset(&local, 0, sizeof(local));
4404 local.nl_family = AF_NETLINK;
4405 local.nl_groups = RTMGRP_LINK;
4406 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4407 perror("bind(netlink)");
4408 close(s);
4409 return -1;
4410 }
4411
4412 time(&end);
4413 end += 30; /* Wait at most 30 seconds for scan results */
4414 for (;;) {
4415 time(&now);
4416 tv.tv_sec = end > now ? end - now : 0;
4417 tv.tv_usec = 0;
4418 FD_ZERO(&rfds);
4419 FD_SET(s, &rfds);
4420 res = select(s + 1, &rfds, NULL, NULL, &tv);
4421 if (res < 0) {
4422 perror("select");
4423 /* Assume results are ready after 10 seconds wait */
4424 os_sleep(10, 0);
4425 break;
4426 } else if (res) {
4427 if (i802_is_scan_complete(s, ifindex)) {
4428 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4429 "completed");
4430 break;
4431 }
4432 } else {
4433 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4434 /* Assume results are ready to be read now */
4435 break;
4436 }
4437 }
4438
4439 close(s);
4440
4441 return i802_get_ht_scan_res(drv);
4442 }
4443 #endif /* CONFIG_IEEE80211N */
4444
4445
4446 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4447 {
4448 struct ifreq ifr;
4449 int ret;
4450
4451 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4452 if (drv->ioctl_sock < 0) {
4453 perror("socket[PF_INET,SOCK_DGRAM]");
4454 return -1;
4455 }
4456
4457 /* start listening for EAPOL on the default AP interface */
4458 add_ifidx(drv, if_nametoindex(drv->ifname));
4459
4460 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4461 return -1;
4462
4463 if (bssid) {
4464 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4465 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4466 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4467
4468 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4469 perror("ioctl(SIOCSIFHWADDR)");
4470 return -1;
4471 }
4472 }
4473
4474 /*
4475 * initialise generic netlink and nl80211
4476 */
4477 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4478 if (!drv->nl_cb) {
4479 printf("Failed to allocate netlink callbacks.\n");
4480 return -1;
4481 }
4482
4483 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4484 if (!drv->nl_handle) {
4485 printf("Failed to allocate netlink handle.\n");
4486 return -1;
4487 }
4488
4489 if (genl_connect(drv->nl_handle)) {
4490 printf("Failed to connect to generic netlink.\n");
4491 return -1;
4492 }
4493
4494 #ifdef CONFIG_LIBNL20
4495 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4496 printf("Failed to allocate generic netlink cache.\n");
4497 return -1;
4498 }
4499 #else /* CONFIG_LIBNL20 */
4500 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4501 if (!drv->nl_cache) {
4502 printf("Failed to allocate generic netlink cache.\n");
4503 return -1;
4504 }
4505 #endif /* CONFIG_LIBNL20 */
4506
4507 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4508 if (!drv->nl80211) {
4509 printf("nl80211 not found.\n");
4510 return -1;
4511 }
4512
4513 ret = nl_get_multicast_id(drv, "nl80211", "scan");
4514 if (ret >= 0)
4515 ret = nl_socket_add_membership(drv->nl_handle, ret);
4516 if (ret < 0) {
4517 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4518 "membership for scan events: %d (%s)",
4519 ret, strerror(-ret));
4520 }
4521
4522 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4523 if (ret >= 0)
4524 ret = nl_socket_add_membership(drv->nl_handle, ret);
4525 if (ret < 0) {
4526 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4527 "membership for mlme events: %d (%s)",
4528 ret, strerror(-ret));
4529 }
4530
4531 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4532 wpa_driver_nl80211_event_receive, drv,
4533 drv->hapd);
4534
4535 #ifdef CONFIG_IEEE80211N
4536 if (drv->ht_40mhz_scan) {
4537 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4538 || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4539 i802_ht_scan(drv) ||
4540 hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4541 wpa_printf(MSG_ERROR, "Failed to scan channels for "
4542 "HT 40 MHz operations");
4543 return -1;
4544 }
4545 }
4546 #endif /* CONFIG_IEEE80211N */
4547
4548 /* Initialise a monitor interface */
4549 if (nl80211_create_monitor_interface(drv))
4550 return -1;
4551
4552 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4553 goto fail1;
4554
4555 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4556 goto fail1;
4557
4558 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4559 if (drv->eapol_sock < 0) {
4560 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4561 goto fail1;
4562 }
4563
4564 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4565 {
4566 printf("Could not register read socket for eapol\n");
4567 return -1;
4568 }
4569
4570 memset(&ifr, 0, sizeof(ifr));
4571 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4572 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4573 perror("ioctl(SIOCGIFHWADDR)");
4574 goto fail1;
4575 }
4576
4577 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4578 printf("Invalid HW-addr family 0x%04x\n",
4579 ifr.ifr_hwaddr.sa_family);
4580 goto fail1;
4581 }
4582 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4583
4584 return 0;
4585
4586 fail1:
4587 nl80211_remove_iface(drv, drv->monitor_ifidx);
4588 return -1;
4589 }
4590
4591
4592 static int i802_get_inact_sec(void *priv, const u8 *addr)
4593 {
4594 struct hostap_sta_driver_data data;
4595 int ret;
4596
4597 data.inactive_msec = (unsigned long) -1;
4598 ret = i802_read_sta_data(priv, &data, addr);
4599 if (ret || data.inactive_msec == (unsigned long) -1)
4600 return -1;
4601 return data.inactive_msec / 1000;
4602 }
4603
4604
4605 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4606 {
4607 #if 0
4608 /* TODO */
4609 #endif
4610 return 0;
4611 }
4612
4613
4614 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4615 {
4616 struct wpa_driver_nl80211_data *drv = priv;
4617 struct ieee80211_mgmt mgmt;
4618
4619 memset(&mgmt, 0, sizeof(mgmt));
4620 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4621 WLAN_FC_STYPE_DEAUTH);
4622 memcpy(mgmt.da, addr, ETH_ALEN);
4623 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4624 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4625 mgmt.u.deauth.reason_code = host_to_le16(reason);
4626 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4627 IEEE80211_HDRLEN +
4628 sizeof(mgmt.u.deauth));
4629 }
4630
4631
4632 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4633 {
4634 struct wpa_driver_nl80211_data *drv = priv;
4635 struct ieee80211_mgmt mgmt;
4636
4637 memset(&mgmt, 0, sizeof(mgmt));
4638 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4639 WLAN_FC_STYPE_DISASSOC);
4640 memcpy(mgmt.da, addr, ETH_ALEN);
4641 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4642 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4643 mgmt.u.disassoc.reason_code = host_to_le16(reason);
4644 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4645 IEEE80211_HDRLEN +
4646 sizeof(mgmt.u.disassoc));
4647 }
4648
4649
4650 static const struct hostapd_neighbor_bss *
4651 i802_get_neighbor_bss(void *priv, size_t *num)
4652 {
4653 struct wpa_driver_nl80211_data *drv = priv;
4654 *num = drv->num_neighbors;
4655 return drv->neighbors;
4656 }
4657
4658
4659 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
4660 {
4661 struct wpa_driver_nl80211_data *drv;
4662 size_t i;
4663
4664 drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4665 if (drv == NULL) {
4666 printf("Could not allocate memory for i802 driver data\n");
4667 return NULL;
4668 }
4669
4670 drv->hapd = hapd;
4671 memcpy(drv->ifname, hapd->conf->iface, sizeof(drv->ifname));
4672 memcpy(drv->bss.ifname, hapd->conf->iface, sizeof(drv->bss.ifname));
4673 drv->ifindex = if_nametoindex(drv->ifname);
4674
4675 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4676 drv->if_indices = drv->default_if_indices;
4677 for (i = 0; i < hapd->iface->num_bss; i++) {
4678 struct hostapd_data *bss = hapd->iface->bss[i];
4679 if (bss->conf->bridge)
4680 add_ifidx(drv, if_nametoindex(bss->conf->bridge));
4681 }
4682 drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
4683
4684 if (i802_init_sockets(drv, bssid))
4685 goto failed;
4686
4687 return drv;
4688
4689 failed:
4690 free(drv);
4691 return NULL;
4692 }
4693
4694
4695 static void *i802_init(struct hostapd_data *hapd)
4696 {
4697 return i802_init_bssid(hapd, NULL);
4698 }
4699
4700
4701 static void i802_deinit(void *priv)
4702 {
4703 struct wpa_driver_nl80211_data *drv = priv;
4704 struct i802_bss *bss, *prev;
4705
4706 if (drv->last_freq_ht) {
4707 /* Clear HT flags from the driver */
4708 struct hostapd_freq_params freq;
4709 os_memset(&freq, 0, sizeof(freq));
4710 freq.freq = drv->last_freq;
4711 i802_set_freq(priv, &freq);
4712 }
4713
4714 i802_del_beacon(drv);
4715
4716 /* remove monitor interface */
4717 nl80211_remove_iface(drv, drv->monitor_ifidx);
4718
4719 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4720
4721 if (drv->monitor_sock >= 0) {
4722 eloop_unregister_read_sock(drv->monitor_sock);
4723 close(drv->monitor_sock);
4724 }
4725 if (drv->ioctl_sock >= 0)
4726 close(drv->ioctl_sock);
4727 if (drv->eapol_sock >= 0) {
4728 eloop_unregister_read_sock(drv->eapol_sock);
4729 close(drv->eapol_sock);
4730 }
4731
4732 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4733 genl_family_put(drv->nl80211);
4734 nl_cache_free(drv->nl_cache);
4735 nl_handle_destroy(drv->nl_handle);
4736 nl_cb_put(drv->nl_cb);
4737
4738 if (drv->if_indices != drv->default_if_indices)
4739 free(drv->if_indices);
4740
4741 os_free(drv->neighbors);
4742
4743 bss = drv->bss.next;
4744 while (bss) {
4745 prev = bss;
4746 bss = bss->next;
4747 os_free(bss);
4748 }
4749
4750 free(drv);
4751 }
4752
4753 #endif /* HOSTAPD */
4754
4755
4756 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4757 .name = "nl80211",
4758 .desc = "Linux nl80211/cfg80211",
4759 .get_bssid = wpa_driver_nl80211_get_bssid,
4760 .get_ssid = wpa_driver_nl80211_get_ssid,
4761 .set_key = wpa_driver_nl80211_set_key,
4762 .scan2 = wpa_driver_nl80211_scan,
4763 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4764 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4765 .disassociate = wpa_driver_nl80211_disassociate,
4766 .authenticate = wpa_driver_nl80211_authenticate,
4767 .associate = wpa_driver_nl80211_associate,
4768 .init = wpa_driver_nl80211_init,
4769 .deinit = wpa_driver_nl80211_deinit,
4770 .get_capa = wpa_driver_nl80211_get_capa,
4771 .set_operstate = wpa_driver_nl80211_set_operstate,
4772 .set_country = wpa_driver_nl80211_set_country,
4773 #ifdef CONFIG_AP
4774 .set_beacon = wpa_driver_nl80211_set_beacon,
4775 .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4776 .send_mlme = wpa_driver_nl80211_send_mlme,
4777 #endif /* CONFIG_AP */
4778 #if defined(CONFIG_AP) || defined(HOSTAPD)
4779 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4780 #endif /* CONFIG_AP || HOSTAPD */
4781 #ifdef HOSTAPD
4782 .hapd_init = i802_init,
4783 .init_bssid = i802_init_bssid,
4784 .hapd_deinit = i802_deinit,
4785 .hapd_set_key = i802_set_key,
4786 .get_seqnum = i802_get_seqnum,
4787 .flush = i802_flush,
4788 .read_sta_data = i802_read_sta_data,
4789 .hapd_send_eapol = i802_send_eapol,
4790 .sta_set_flags = i802_sta_set_flags,
4791 .sta_deauth = i802_sta_deauth,
4792 .sta_disassoc = i802_sta_disassoc,
4793 .sta_remove = i802_sta_remove,
4794 .sta_add = i802_sta_add,
4795 .get_inact_sec = i802_get_inact_sec,
4796 .sta_clear_stats = i802_sta_clear_stats,
4797 .set_freq = i802_set_freq,
4798 .set_rts = i802_set_rts,
4799 .set_frag = i802_set_frag,
4800 .set_retry = i802_set_retry,
4801 .set_rate_sets = i802_set_rate_sets,
4802 .hapd_set_beacon = i802_set_beacon,
4803 .hapd_set_beacon_int = i802_set_beacon_int,
4804 .set_cts_protect = i802_set_cts_protect,
4805 .set_preamble = i802_set_preamble,
4806 .set_short_slot_time = i802_set_short_slot_time,
4807 .set_tx_queue_params = i802_set_tx_queue_params,
4808 .bss_add = i802_bss_add,
4809 .bss_remove = i802_bss_remove,
4810 .if_add = i802_if_add,
4811 .if_update = i802_if_update,
4812 .if_remove = i802_if_remove,
4813 .set_sta_vlan = i802_set_sta_vlan,
4814 .get_neighbor_bss = i802_get_neighbor_bss,
4815 #endif /* HOSTAPD */
4816 };
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