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bcm47xx: Remove FIXME
[openwrt/svn-archive/archive.git] / package / hostapd / files / driver_nl80211.c
1 /*
2 * hostapd / Kernel driver communication via nl80211
3 * Copyright (c) 2002-2007, 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 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Alternatively, this software may be distributed under the terms of BSD
13 * license.
14 *
15 * See README and COPYING for more details.
16 */
17
18 #include "includes.h"
19
20 #include <sys/ioctl.h>
21 #include <netlink/genl/genl.h>
22 #include <netlink/genl/family.h>
23 #include <netlink/genl/ctrl.h>
24 #include <netlink/msg.h>
25 #include <netlink/attr.h>
26 #include <linux/nl80211.h>
27 #include <net/if.h>
28 #include <linux/if_packet.h>
29 #include <linux/if_ether.h> /* The L2 protocols */
30 #include <linux/wireless.h>
31 #include <net/if_arp.h>
32
33 #include "hostapd.h"
34 #include "driver.h"
35 #include "ieee802_1x.h"
36 #include "eloop.h"
37 #include "ieee802_11.h"
38 #include "sta_info.h"
39 #include "hw_features.h"
40 #include "mlme.h"
41 #include "radiotap.h"
42 #include "radiotap_iter.h"
43
44 enum ieee80211_msg_type {
45 ieee80211_msg_normal = 0,
46 ieee80211_msg_tx_callback_ack = 1,
47 ieee80211_msg_tx_callback_fail = 2,
48 };
49
50 struct i802_driver_data {
51 struct hostapd_data *hapd;
52
53 char iface[IFNAMSIZ + 1];
54 int ioctl_sock; /* socket for ioctl() use */
55 int wext_sock; /* socket for wireless events */
56 int eapol_sock; /* socket for EAPOL frames */
57 int monitor_sock; /* socket for monitor */
58 int monitor_ifidx;
59
60 int default_if_indices[16];
61 int *if_indices;
62 int num_if_indices;
63
64 int we_version;
65 struct nl_handle *nl_handle;
66 struct nl_cache *nl_cache;
67 struct genl_family *nl80211;
68 int dtim_period;
69 unsigned int beacon_set:1;
70 unsigned int ieee802_1x_active:1;
71 };
72
73
74 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
75 {
76 int i;
77 int *old;
78
79 for (i = 0; i < drv->num_if_indices; i++) {
80 if (drv->if_indices[i] == 0) {
81 drv->if_indices[i] = ifidx;
82 return;
83 }
84 }
85
86 if (drv->if_indices != drv->default_if_indices)
87 old = drv->if_indices;
88 else
89 old = NULL;
90
91 drv->if_indices = realloc(old,
92 sizeof(int) * (drv->num_if_indices + 1));
93 if (!drv->if_indices) {
94 if (!old)
95 drv->if_indices = drv->default_if_indices;
96 else
97 drv->if_indices = old;
98 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
99 "interfaces");
100 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
101 return;
102 }
103 drv->if_indices[drv->num_if_indices] = ifidx;
104 drv->num_if_indices++;
105 }
106
107
108 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
109 {
110 int i;
111
112 for (i = 0; i < drv->num_if_indices; i++) {
113 if (drv->if_indices[i] == ifidx) {
114 drv->if_indices[i] = 0;
115 break;
116 }
117 }
118 }
119
120
121 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
122 {
123 int i;
124
125 for (i = 0; i < drv->num_if_indices; i++)
126 if (drv->if_indices[i] == ifidx)
127 return 1;
128
129 return 0;
130 }
131
132
133 /* helper for netlink get routines */
134 static int ack_wait_handler(struct nl_msg *msg, void *arg)
135 {
136 int *finished = arg;
137
138 *finished = 1;
139 return NL_STOP;
140 }
141
142
143 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
144 const char *ifname, int dev_up)
145 {
146 struct ifreq ifr;
147
148 if (drv->ioctl_sock < 0)
149 return -1;
150
151 memset(&ifr, 0, sizeof(ifr));
152 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
153
154 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
155 perror("ioctl[SIOCGIFFLAGS]");
156 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
157 drv->iface);
158 return -1;
159 }
160
161 if (dev_up)
162 ifr.ifr_flags |= IFF_UP;
163 else
164 ifr.ifr_flags &= ~IFF_UP;
165
166 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
167 perror("ioctl[SIOCSIFFLAGS]");
168 return -1;
169 }
170
171 return 0;
172 }
173
174
175 static int i802_set_encryption(const char *iface, void *priv, const char *alg,
176 const u8 *addr, int idx, const u8 *key,
177 size_t key_len, int txkey)
178 {
179 struct i802_driver_data *drv = priv;
180 struct nl_msg *msg;
181 int ret = -1;
182 int err = 0;
183
184 msg = nlmsg_alloc();
185 if (!msg)
186 goto out;
187
188 if (strcmp(alg, "none") == 0) {
189 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
190 0, NL80211_CMD_DEL_KEY, 0);
191 } else {
192 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
193 0, NL80211_CMD_NEW_KEY, 0);
194 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
195 if (strcmp(alg, "WEP") == 0) {
196 if (key_len == 5)
197 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
198 0x000FAC01);
199 else
200 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
201 0x000FAC05);
202 } else if (strcmp(alg, "TKIP") == 0)
203 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
204 else if (strcmp(alg, "CCMP") == 0)
205 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
206 else
207 goto out;
208 }
209
210 if (addr)
211 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
212 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
213 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
214
215 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
216 (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
217 if (err != -ENOENT) {
218 err = 0;
219 goto out;
220 }
221 }
222
223 /*
224 * If we need to set the default TX key we do that below,
225 * otherwise we're done here.
226 */
227 if (!txkey || addr) {
228 ret = 0;
229 goto out;
230 }
231
232 nlmsg_free(msg);
233
234 msg = nlmsg_alloc();
235 if (!msg)
236 goto out;
237
238 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
239 0, NL80211_CMD_SET_KEY, 0);
240 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
241 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
242 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
243
244 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
245 (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
246 if (err != -ENOENT) {
247 err = 0;
248 goto out;
249 }
250 }
251
252 ret = 0;
253
254 out:
255 nla_put_failure:
256 nlmsg_free(msg);
257 return ret;
258 }
259
260
261 static inline int min_int(int a, int b)
262 {
263 if (a < b)
264 return a;
265 return b;
266 }
267
268
269 static int get_key_handler(struct nl_msg *msg, void *arg)
270 {
271 struct nlattr *tb[NL80211_ATTR_MAX];
272 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
273
274 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
275 genlmsg_attrlen(gnlh, 0), NULL);
276
277 /*
278 * TODO: validate the key index and mac address!
279 * Otherwise, there's a race condition as soon as
280 * the kernel starts sending key notifications.
281 */
282
283 if (tb[NL80211_ATTR_KEY_SEQ])
284 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
285 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
286 return NL_SKIP;
287 }
288
289
290 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
291 int idx, u8 *seq)
292 {
293 struct i802_driver_data *drv = priv;
294 struct nl_msg *msg;
295 struct nl_cb *cb = NULL;
296 int ret = -1;
297 int err = 0;
298 int finished = 0;
299
300 msg = nlmsg_alloc();
301 if (!msg)
302 goto out;
303
304 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
305 0, NL80211_CMD_GET_KEY, 0);
306
307 if (addr)
308 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
309 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
310 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
311
312 cb = nl_cb_alloc(NL_CB_CUSTOM);
313 if (!cb)
314 goto out;
315
316 memset(seq, 0, 6);
317
318 if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
319 goto out;
320
321 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
322 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
323
324 err = nl_recvmsgs(drv->nl_handle, cb);
325
326 if (!finished)
327 err = nl_wait_for_ack(drv->nl_handle);
328
329 if (err < 0)
330 goto out;
331
332 ret = 0;
333
334 out:
335 nl_cb_put(cb);
336 nla_put_failure:
337 nlmsg_free(msg);
338 return ret;
339 }
340
341
342 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
343 int mode)
344 {
345 return -1;
346 }
347
348
349 static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
350 int len)
351 {
352 struct i802_driver_data *drv = priv;
353 struct iwreq iwr;
354
355 memset(&iwr, 0, sizeof(iwr));
356 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
357 iwr.u.essid.flags = 1; /* SSID active */
358 iwr.u.essid.pointer = (caddr_t) buf;
359 iwr.u.essid.length = len;
360
361 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
362 perror("ioctl[SIOCSIWESSID]");
363 printf("len=%d\n", len);
364 return -1;
365 }
366
367 return 0;
368 }
369
370
371 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
372 int flags)
373 {
374 struct ieee80211_hdr *hdr = (void*) data;
375 __u8 rtap_hdr[] = {
376 0x00, 0x00, /* radiotap version */
377 0x0e, 0x00, /* radiotap length */
378 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
379 0x0c, /* F_WEP | F_FRAG (encrypt/fragment if required) */
380 0x00, /* padding */
381 0x00, 0x00, /* RX and TX flags to indicate that */
382 0x00, 0x00, /* this is the injected frame directly */
383 };
384 struct i802_driver_data *drv = priv;
385 struct iovec iov[2] = {
386 {
387 .iov_base = &rtap_hdr,
388 .iov_len = sizeof(rtap_hdr),
389 },
390 {
391 .iov_base = (void*)data,
392 .iov_len = len,
393 }
394 };
395 struct msghdr msg = {
396 .msg_name = NULL,
397 .msg_namelen = 0,
398 .msg_iov = iov,
399 .msg_iovlen = 2,
400 .msg_control = NULL,
401 .msg_controllen = 0,
402 .msg_flags = 0,
403 };
404
405 /*
406 * ugh, guess what, the generic code sets one of the version
407 * bits to request tx callback
408 */
409 hdr->frame_control &= ~host_to_le16(BIT(1));
410 return sendmsg(drv->monitor_sock, &msg, flags);
411 }
412
413
414 /* Set kernel driver on given frequency (MHz) */
415 static int i802_set_freq(void *priv, int mode, int freq)
416 {
417 struct i802_driver_data *drv = priv;
418 struct iwreq iwr;
419
420 memset(&iwr, 0, sizeof(iwr));
421 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
422 iwr.u.freq.m = freq;
423 iwr.u.freq.e = 6;
424
425 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
426 perror("ioctl[SIOCSIWFREQ]");
427 return -1;
428 }
429
430 return 0;
431 }
432
433
434 static int i802_set_rts(void *priv, int rts)
435 {
436 struct i802_driver_data *drv = priv;
437 struct iwreq iwr;
438
439 memset(&iwr, 0, sizeof(iwr));
440 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
441 iwr.u.rts.value = rts;
442 iwr.u.rts.fixed = 1;
443
444 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
445 perror("ioctl[SIOCSIWRTS]");
446 return -1;
447 }
448
449 return 0;
450 }
451
452
453 static int i802_get_rts(void *priv, int *rts)
454 {
455 struct i802_driver_data *drv = priv;
456 struct iwreq iwr;
457
458 memset(&iwr, 0, sizeof(iwr));
459 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
460
461 if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
462 perror("ioctl[SIOCGIWRTS]");
463 return -1;
464 }
465
466 *rts = iwr.u.rts.value;
467
468 return 0;
469 }
470
471
472 static int i802_set_frag(void *priv, int frag)
473 {
474 struct i802_driver_data *drv = priv;
475 struct iwreq iwr;
476
477 memset(&iwr, 0, sizeof(iwr));
478 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
479 iwr.u.frag.value = frag;
480 iwr.u.frag.fixed = 1;
481
482 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
483 perror("ioctl[SIOCSIWFRAG]");
484 return -1;
485 }
486
487 return 0;
488 }
489
490
491 static int i802_get_frag(void *priv, int *frag)
492 {
493 struct i802_driver_data *drv = priv;
494 struct iwreq iwr;
495
496 memset(&iwr, 0, sizeof(iwr));
497 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
498
499 if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
500 perror("ioctl[SIOCGIWFRAG]");
501 return -1;
502 }
503
504 *frag = iwr.u.frag.value;
505
506 return 0;
507 }
508
509
510 static int i802_set_retry(void *priv, int short_retry, int long_retry)
511 {
512 struct i802_driver_data *drv = priv;
513 struct iwreq iwr;
514
515 memset(&iwr, 0, sizeof(iwr));
516 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
517
518 iwr.u.retry.value = short_retry;
519 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
520 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
521 perror("ioctl[SIOCSIWRETRY(short)]");
522 return -1;
523 }
524
525 iwr.u.retry.value = long_retry;
526 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
527 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
528 perror("ioctl[SIOCSIWRETRY(long)]");
529 return -1;
530 }
531
532 return 0;
533 }
534
535
536 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
537 {
538 struct i802_driver_data *drv = priv;
539 struct iwreq iwr;
540
541 memset(&iwr, 0, sizeof(iwr));
542 os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
543
544 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
545 if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
546 perror("ioctl[SIOCGIWFRAG(short)]");
547 return -1;
548 }
549 *short_retry = iwr.u.retry.value;
550
551 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
552 if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
553 perror("ioctl[SIOCGIWFRAG(long)]");
554 return -1;
555 }
556 *long_retry = iwr.u.retry.value;
557
558 return 0;
559 }
560
561
562 static int i802_flush(void *priv)
563 {
564 struct i802_driver_data *drv = priv;
565 struct nl_msg *msg;
566 int ret = -1;
567
568 msg = nlmsg_alloc();
569 if (!msg)
570 goto out;
571
572 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
573 0, NL80211_CMD_NEW_STATION, 0);
574
575 /*
576 * XXX: FIX! this needs to flush all VLANs too
577 */
578 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
579 if_nametoindex(drv->iface));
580
581 ret = 0;
582
583 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
584 nl_wait_for_ack(drv->nl_handle) < 0) {
585 ret = -1;
586 }
587
588 nla_put_failure:
589 nlmsg_free(msg);
590
591 out:
592 return ret;
593 }
594
595
596 static int get_sta_handler(struct nl_msg *msg, void *arg)
597 {
598 struct nlattr *tb[NL80211_ATTR_MAX + 1];
599 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
600 struct hostap_sta_driver_data *data = arg;
601 struct nlattr *stats[NL80211_STA_STAT_MAX + 1];
602 static struct nla_policy stats_policy[NL80211_STA_STAT_MAX + 1] = {
603 [NL80211_STA_STAT_INACTIVE_TIME] = { .type = NLA_U32 },
604 [NL80211_STA_STAT_RX_BYTES] = { .type = NLA_U32 },
605 [NL80211_STA_STAT_TX_BYTES] = { .type = NLA_U32 },
606 };
607
608 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
609 genlmsg_attrlen(gnlh, 0), NULL);
610
611 /*
612 * TODO: validate the interface and mac address!
613 * Otherwise, there's a race condition as soon as
614 * the kernel starts sending station notifications.
615 */
616
617 if (!tb[NL80211_ATTR_STA_STATS]) {
618 wpa_printf(MSG_DEBUG, "sta stats missing!");
619 return NL_SKIP;
620 }
621 if (nla_parse_nested(stats, NL80211_STA_STAT_MAX,
622 tb[NL80211_ATTR_STA_STATS],
623 stats_policy)) {
624 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
625 return NL_SKIP;
626 }
627
628 if (stats[NL80211_STA_STAT_INACTIVE_TIME])
629 data->inactive_msec =
630 nla_get_u32(stats[NL80211_STA_STAT_INACTIVE_TIME]);
631 if (stats[NL80211_STA_STAT_RX_BYTES])
632 data->rx_bytes = nla_get_u32(stats[NL80211_STA_STAT_RX_BYTES]);
633 if (stats[NL80211_STA_STAT_TX_BYTES])
634 data->rx_bytes = nla_get_u32(stats[NL80211_STA_STAT_TX_BYTES]);
635
636 return NL_SKIP;
637 }
638
639 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
640 const u8 *addr)
641 {
642 struct i802_driver_data *drv = priv;
643 struct nl_msg *msg;
644 struct nl_cb *cb = NULL;
645 int ret = -1;
646 int err = 0;
647 int finished = 0;
648
649 msg = nlmsg_alloc();
650 if (!msg)
651 goto out;
652
653 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
654 0, NL80211_CMD_GET_STATION, 0);
655
656 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
657 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
658
659 cb = nl_cb_alloc(NL_CB_CUSTOM);
660 if (!cb)
661 goto out;
662
663 if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
664 goto out;
665
666 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_sta_handler, data);
667 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
668
669 err = nl_recvmsgs(drv->nl_handle, cb);
670
671 if (!finished)
672 err = nl_wait_for_ack(drv->nl_handle);
673
674 if (err < 0)
675 goto out;
676
677 ret = 0;
678
679 out:
680 nl_cb_put(cb);
681 nla_put_failure:
682 nlmsg_free(msg);
683 return ret;
684
685 }
686
687
688 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
689 size_t data_len, int encrypt, const u8 *own_addr)
690 {
691 struct i802_driver_data *drv = priv;
692 struct ieee80211_hdr *hdr;
693 size_t len;
694 u8 *pos;
695 int res;
696 #if 0 /* FIX */
697 int qos = sta->flags & WLAN_STA_WME;
698 #else
699 int qos = 0;
700 #endif
701
702 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
703 data_len;
704 hdr = os_zalloc(len);
705 if (hdr == NULL) {
706 printf("malloc() failed for i802_send_data(len=%lu)\n",
707 (unsigned long) len);
708 return -1;
709 }
710
711 hdr->frame_control =
712 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
713 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
714 if (encrypt)
715 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
716 #if 0 /* To be enabled if qos determination is added above */
717 if (qos) {
718 hdr->frame_control |=
719 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
720 }
721 #endif
722
723 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
724 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
725 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
726 pos = (u8 *) (hdr + 1);
727
728 #if 0 /* To be enabled if qos determination is added above */
729 if (qos) {
730 /* add an empty QoS header if needed */
731 pos[0] = 0;
732 pos[1] = 0;
733 pos += 2;
734 }
735 #endif
736
737 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
738 pos += sizeof(rfc1042_header);
739 WPA_PUT_BE16(pos, ETH_P_PAE);
740 pos += 2;
741 memcpy(pos, data, data_len);
742
743 res = i802_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
744 free(hdr);
745
746 if (res < 0) {
747 perror("i802_send_eapol: send");
748 printf("i802_send_eapol - packet len: %lu - failed\n",
749 (unsigned long) len);
750 }
751
752 return res;
753 }
754
755
756 static int i802_sta_add(const char *ifname, void *priv, const u8 *addr,
757 u16 aid, u16 capability, u8 *supp_rates,
758 size_t supp_rates_len, int flags)
759 {
760 struct i802_driver_data *drv = priv;
761 struct nl_msg *msg;
762 int ret = -1;
763
764 msg = nlmsg_alloc();
765 if (!msg)
766 goto out;
767
768 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
769 0, NL80211_CMD_NEW_STATION, 0);
770
771 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
772 if_nametoindex(drv->iface));
773 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
774 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, aid);
775 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
776 supp_rates);
777 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 0);
778
779 ret = nl_send_auto_complete(drv->nl_handle, msg);
780 if (ret < 0)
781 goto nla_put_failure;
782
783 ret = nl_wait_for_ack(drv->nl_handle);
784 /* ignore EEXIST, this happens if a STA associates while associated */
785 if (ret == -EEXIST || ret >= 0)
786 ret = 0;
787
788 nla_put_failure:
789 nlmsg_free(msg);
790
791 out:
792 return ret;
793 }
794
795
796 static int i802_sta_remove(void *priv, const u8 *addr)
797 {
798 struct i802_driver_data *drv = priv;
799 struct nl_msg *msg;
800 int ret = -1;
801
802 msg = nlmsg_alloc();
803 if (!msg)
804 goto out;
805
806 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
807 0, NL80211_CMD_DEL_STATION, 0);
808
809 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
810 if_nametoindex(drv->iface));
811 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
812
813 ret = 0;
814
815 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
816 nl_wait_for_ack(drv->nl_handle) < 0) {
817 ret = -1;
818 }
819
820 nla_put_failure:
821 nlmsg_free(msg);
822
823 out:
824 return ret;
825 }
826
827
828 static int i802_sta_set_flags(void *priv, const u8 *addr,
829 int total_flags, int flags_or, int flags_and)
830 {
831 struct i802_driver_data *drv = priv;
832 struct nl_msg *msg, *flags = NULL;
833 int ret = -1;
834
835 msg = nlmsg_alloc();
836 if (!msg)
837 goto out;
838
839 flags = nlmsg_alloc();
840 if (!flags)
841 goto free_msg;
842
843 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
844 0, NL80211_CMD_SET_STATION, 0);
845
846 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
847 if_nametoindex(drv->iface));
848 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
849
850 if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
851 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
852
853 if (total_flags & WLAN_STA_WME)
854 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
855
856 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
857 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
858
859 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
860 goto nla_put_failure;
861
862 ret = 0;
863
864 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
865 nl_wait_for_ack(drv->nl_handle) < 0) {
866 ret = -1;
867 }
868
869 nla_put_failure:
870 nlmsg_free(flags);
871
872 free_msg:
873 nlmsg_free(msg);
874
875 out:
876 return ret;
877 }
878
879
880 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
881 unsigned char power_level,
882 unsigned char antenna_max)
883 {
884 return -1;
885 }
886
887
888 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
889 {
890 return -1;
891 }
892
893
894 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
895 int cw_min, int cw_max, int burst_time)
896 {
897 return -1;
898 }
899
900
901 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
902 {
903 struct nl_msg *msg;
904
905 /* stop listening for EAPOL on this interface */
906 del_ifidx(drv, ifidx);
907
908 msg = nlmsg_alloc();
909 if (!msg)
910 goto nla_put_failure;
911
912 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
913 0, NL80211_CMD_DEL_INTERFACE, 0);
914 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
915 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
916 nl_wait_for_ack(drv->nl_handle) < 0)
917 nla_put_failure:
918 printf("Failed to remove interface.\n");
919 nlmsg_free(msg);
920 }
921
922
923 static int nl80211_create_iface(struct i802_driver_data *drv,
924 const char *ifname,
925 enum nl80211_iftype iftype,
926 const u8 *addr)
927 {
928 struct nl_msg *msg, *flags = NULL;
929 int ifidx;
930 struct ifreq ifreq;
931 struct iwreq iwr;
932
933 msg = nlmsg_alloc();
934 if (!msg)
935 return -1;
936
937 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
938 0, NL80211_CMD_NEW_INTERFACE, 0);
939 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
940 if_nametoindex(drv->hapd->conf->iface));
941 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
942 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
943
944 if (iftype == NL80211_IFTYPE_MONITOR) {
945 int err;
946
947 flags = nlmsg_alloc();
948 if (!flags)
949 goto nla_put_failure;
950
951 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
952
953 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
954
955 nlmsg_free(flags);
956
957 if (err)
958 goto nla_put_failure;
959 }
960
961 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
962 nl_wait_for_ack(drv->nl_handle) < 0) {
963 nla_put_failure:
964 printf("Failed to create interface %s.\n", ifname);
965 nlmsg_free(msg);
966 return -1;
967 }
968
969 nlmsg_free(msg);
970
971 ifidx = if_nametoindex(ifname);
972
973 if (ifidx <= 0)
974 return -1;
975
976 /* start listening for EAPOL on this interface */
977 add_ifidx(drv, ifidx);
978
979 if (addr) {
980 switch (iftype) {
981 case NL80211_IFTYPE_AP:
982 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
983 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
984 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
985
986 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
987 nl80211_remove_iface(drv, ifidx);
988 return -1;
989 }
990 break;
991 case NL80211_IFTYPE_WDS:
992 memset(&iwr, 0, sizeof(iwr));
993 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
994 iwr.u.addr.sa_family = ARPHRD_ETHER;
995 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
996 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
997 return -1;
998 break;
999 default:
1000 /* nothing */
1001 break;
1002 }
1003 }
1004
1005 return ifidx;
1006 }
1007
1008
1009 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1010 {
1011 int ifidx;
1012
1013 /*
1014 * The kernel supports that when the low-level driver does,
1015 * but we currently don't because we need per-BSS data that
1016 * currently we can't handle easily.
1017 */
1018 return -1;
1019
1020 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1021 if (ifidx < 0)
1022 return -1;
1023 if (hostapd_set_iface_flags(priv, ifname, 1)) {
1024 nl80211_remove_iface(priv, ifidx);
1025 return -1;
1026 }
1027 return 0;
1028 }
1029
1030
1031 static int i802_bss_remove(void *priv, const char *ifname)
1032 {
1033 nl80211_remove_iface(priv, if_nametoindex(ifname));
1034 return 0;
1035 }
1036
1037
1038 static int i802_set_beacon(const char *iface, void *priv,
1039 u8 *head, size_t head_len,
1040 u8 *tail, size_t tail_len)
1041 {
1042 struct i802_driver_data *drv = priv;
1043 struct nl_msg *msg;
1044 u8 cmd = NL80211_CMD_NEW_BEACON;
1045 int ret = -1;
1046
1047 msg = nlmsg_alloc();
1048 if (!msg)
1049 goto out;
1050
1051 if (drv->beacon_set)
1052 cmd = NL80211_CMD_SET_BEACON;
1053
1054 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1055 0, cmd, 0);
1056 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1057 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1058 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1059 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, 1000);
1060
1061 if (!drv->dtim_period)
1062 drv->dtim_period = 2;
1063 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1064
1065 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1066 nl_wait_for_ack(drv->nl_handle) < 0)
1067 goto out;
1068
1069 ret = 0;
1070
1071 drv->beacon_set = 1;
1072
1073 out:
1074 nla_put_failure:
1075 nlmsg_free(msg);
1076 return ret;
1077 }
1078
1079
1080 static int i802_del_beacon(struct i802_driver_data *drv)
1081 {
1082 struct nl_msg *msg;
1083 int ret = -1;
1084
1085 msg = nlmsg_alloc();
1086 if (!msg)
1087 goto out;
1088
1089 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1090 0, NL80211_CMD_DEL_BEACON, 0);
1091 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1092
1093 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1094 nl_wait_for_ack(drv->nl_handle) < 0)
1095 goto out;
1096
1097 ret = 0;
1098
1099 out:
1100 nla_put_failure:
1101 nlmsg_free(msg);
1102 return ret;
1103 }
1104
1105
1106 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1107 {
1108 struct i802_driver_data *drv = priv;
1109
1110 /*
1111 * FIXME: This needs to be per interface (BSS)
1112 */
1113 drv->ieee802_1x_active = enabled;
1114 return 0;
1115 }
1116
1117
1118 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1119 {
1120 struct i802_driver_data *drv = priv;
1121 struct iwreq iwr;
1122
1123 memset(&iwr, 0, sizeof(iwr));
1124
1125 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1126 iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1127 iwr.u.param.value = enabled;
1128
1129 ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1130
1131 /* ignore errors, the kernel/driver might not care */
1132 return 0;
1133 }
1134
1135
1136 static int i802_set_internal_bridge(void *priv, int value)
1137 {
1138 return -1;
1139 }
1140
1141
1142 static int i802_set_beacon_int(void *priv, int value)
1143 {
1144 struct i802_driver_data *drv = priv;
1145 struct nl_msg *msg;
1146 int ret = -1;
1147
1148 msg = nlmsg_alloc();
1149 if (!msg)
1150 goto out;
1151
1152 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1153 0, NL80211_CMD_SET_BEACON, 0);
1154 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1155
1156 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1157
1158 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1159 nl_wait_for_ack(drv->nl_handle) < 0)
1160 goto out;
1161
1162 ret = 0;
1163
1164 out:
1165 nla_put_failure:
1166 nlmsg_free(msg);
1167 return ret;
1168 }
1169
1170
1171 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1172 {
1173 struct i802_driver_data *drv = priv;
1174 struct nl_msg *msg;
1175 int ret = -1;
1176
1177 msg = nlmsg_alloc();
1178 if (!msg)
1179 goto out;
1180
1181 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1182 0, NL80211_CMD_SET_BEACON, 0);
1183 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1184
1185 drv->dtim_period = value;
1186 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1187
1188 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1189 nl_wait_for_ack(drv->nl_handle) < 0)
1190 goto out;
1191
1192 ret = 0;
1193
1194 out:
1195 nla_put_failure:
1196 nlmsg_free(msg);
1197 return ret;
1198 }
1199
1200
1201 static int i802_set_cts_protect(void *priv, int value)
1202 {
1203 return -1;
1204 }
1205
1206
1207 static int i802_set_preamble(void *priv, int value)
1208 {
1209 return -1;
1210 }
1211
1212
1213 static int i802_set_short_slot_time(void *priv, int value)
1214 {
1215 return -1;
1216 }
1217
1218
1219 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1220 {
1221 switch (type) {
1222 case HOSTAPD_IF_VLAN:
1223 return NL80211_IFTYPE_AP_VLAN;
1224 case HOSTAPD_IF_WDS:
1225 return NL80211_IFTYPE_WDS;
1226 }
1227 return -1;
1228 }
1229
1230
1231 static int i802_if_add(const char *iface, void *priv,
1232 enum hostapd_driver_if_type type, char *ifname,
1233 const u8 *addr)
1234 {
1235 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1236 return -1;
1237 return 0;
1238 }
1239
1240
1241 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1242 char *ifname, const u8 *addr)
1243 {
1244 /* unused at the moment */
1245 return -1;
1246 }
1247
1248
1249 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1250 const char *ifname, const u8 *addr)
1251 {
1252 nl80211_remove_iface(priv, if_nametoindex(ifname));
1253 return 0;
1254 }
1255
1256
1257 struct phy_info_arg {
1258 u16 *num_modes;
1259 struct hostapd_hw_modes *modes;
1260 int error;
1261 };
1262
1263 static int phy_info_handler(struct nl_msg *msg, void *arg)
1264 {
1265 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1266 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1267 struct phy_info_arg *phy_info = arg;
1268
1269 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1270
1271 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1272 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1273 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1274 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1275 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1276 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1277 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1278 };
1279
1280 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1281 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1282 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1283 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1284 };
1285
1286 struct nlattr *nl_band;
1287 struct nlattr *nl_freq;
1288 struct nlattr *nl_rate;
1289 int rem_band, rem_freq, rem_rate;
1290 struct hostapd_hw_modes *mode;
1291 int idx, mode_is_set;
1292
1293 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1294 genlmsg_attrlen(gnlh, 0), NULL);
1295
1296 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1297 return NL_SKIP;
1298
1299 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1300 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1301 if (!mode)
1302 return NL_SKIP;
1303 phy_info->modes = mode;
1304
1305 mode_is_set = 0;
1306
1307 mode = &phy_info->modes[*(phy_info->num_modes)];
1308 memset(mode, 0, sizeof(*mode));
1309 *(phy_info->num_modes) += 1;
1310
1311 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1312 nla_len(nl_band), NULL);
1313
1314 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1315 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1316 nla_len(nl_freq), freq_policy);
1317 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1318 continue;
1319 mode->num_channels++;
1320 }
1321
1322 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1323 if (!mode->channels)
1324 return NL_SKIP;
1325
1326 idx = 0;
1327
1328 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1329 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1330 nla_len(nl_freq), freq_policy);
1331 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1332 continue;
1333
1334 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1335 mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1336 HOSTAPD_CHAN_W_ACTIVE_SCAN |
1337 HOSTAPD_CHAN_W_IBSS;
1338
1339 if (!mode_is_set) {
1340 /* crude heuristic */
1341 if (mode->channels[idx].freq < 4000)
1342 mode->mode = HOSTAPD_MODE_IEEE80211B;
1343 else
1344 mode->mode = HOSTAPD_MODE_IEEE80211A;
1345 mode_is_set = 1;
1346 }
1347
1348 /* crude heuristic */
1349 if (mode->channels[idx].freq < 4000)
1350 if (mode->channels[idx].freq == 2848)
1351 mode->channels[idx].chan = 14;
1352 else
1353 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1354 else
1355 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1356
1357 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1358 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1359 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1360 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1361 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1362 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1363 idx++;
1364 }
1365
1366 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1367 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1368 nla_len(nl_rate), rate_policy);
1369 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1370 continue;
1371 mode->num_rates++;
1372 }
1373
1374 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1375 if (!mode->rates)
1376 return NL_SKIP;
1377
1378 idx = 0;
1379
1380 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1381 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1382 nla_len(nl_rate), rate_policy);
1383 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1384 continue;
1385 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1386
1387 /* crude heuristic */
1388 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1389 mode->rates[idx].rate > 200)
1390 mode->mode = HOSTAPD_MODE_IEEE80211G;
1391
1392 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1393 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1394
1395 idx++;
1396 }
1397 }
1398
1399 phy_info->error = 0;
1400
1401 return NL_SKIP;
1402 }
1403
1404 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1405 u16 *num_modes,
1406 u16 *flags)
1407 {
1408 struct i802_driver_data *drv = priv;
1409 struct nl_msg *msg;
1410 int err = -1;
1411 struct nl_cb *cb = NULL;
1412 int finished;
1413 struct phy_info_arg result = {
1414 .num_modes = num_modes,
1415 .modes = NULL,
1416 .error = 1,
1417 };
1418
1419 *num_modes = 0;
1420 *flags = 0;
1421
1422 msg = nlmsg_alloc();
1423 if (!msg)
1424 return NULL;
1425
1426 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1427 0, NL80211_CMD_GET_WIPHY, 0);
1428
1429 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1430
1431 cb = nl_cb_alloc(NL_CB_CUSTOM);
1432 if (!cb)
1433 goto out;
1434
1435 if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
1436 goto out;
1437
1438 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
1439 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
1440
1441 err = nl_recvmsgs(drv->nl_handle, cb);
1442
1443 if (!finished)
1444 err = nl_wait_for_ack(drv->nl_handle);
1445
1446 if (err < 0 || result.error) {
1447 hostapd_free_hw_features(result.modes, *num_modes);
1448 result.modes = NULL;
1449 }
1450
1451 out:
1452 nl_cb_put(cb);
1453 nla_put_failure:
1454 if (err)
1455 fprintf(stderr, "failed to get information: %d\n", err);
1456 nlmsg_free(msg);
1457 return result.modes;
1458 }
1459
1460
1461 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1462 const char *ifname, int vlan_id)
1463 {
1464 struct i802_driver_data *drv = priv;
1465 struct nl_msg *msg;
1466 int ret = -1;
1467
1468 msg = nlmsg_alloc();
1469 if (!msg)
1470 goto out;
1471
1472 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1473 0, NL80211_CMD_SET_STATION, 0);
1474
1475 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1476 if_nametoindex(drv->iface));
1477 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1478 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1479 if_nametoindex(ifname));
1480
1481 ret = 0;
1482
1483 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1484 (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
1485 ret = -1;
1486 }
1487
1488 nla_put_failure:
1489 nlmsg_free(msg);
1490
1491 out:
1492 return ret;
1493 }
1494
1495
1496 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1497 {
1498 struct sta_info *sta;
1499
1500 sta = ap_get_sta(hapd, ta);
1501 if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1502 printf("Data/PS-poll frame from not associated STA "
1503 MACSTR "\n", MAC2STR(ta));
1504 if (sta && (sta->flags & WLAN_STA_AUTH))
1505 hostapd_sta_disassoc(
1506 hapd, ta,
1507 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1508 else
1509 hostapd_sta_deauth(
1510 hapd, ta,
1511 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1512 }
1513 }
1514
1515
1516 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1517 int ok)
1518 {
1519 struct ieee80211_hdr *hdr;
1520 u16 fc, type, stype;
1521 struct sta_info *sta;
1522
1523 hdr = (struct ieee80211_hdr *) buf;
1524 fc = le_to_host16(hdr->frame_control);
1525
1526 type = WLAN_FC_GET_TYPE(fc);
1527 stype = WLAN_FC_GET_STYPE(fc);
1528
1529 switch (type) {
1530 case WLAN_FC_TYPE_MGMT:
1531 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1532 ok ? "ACK" : "fail");
1533 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1534 break;
1535 case WLAN_FC_TYPE_CTRL:
1536 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1537 ok ? "ACK" : "fail");
1538 break;
1539 case WLAN_FC_TYPE_DATA:
1540 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1541 ok ? "ACK" : "fail");
1542 sta = ap_get_sta(hapd, hdr->addr1);
1543 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1544 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1545 "activity poll", MAC2STR(sta->addr),
1546 ok ? "ACKed" : "did not ACK");
1547 if (ok)
1548 sta->flags &= ~WLAN_STA_PENDING_POLL;
1549 }
1550 if (sta)
1551 ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1552 break;
1553 default:
1554 printf("unknown TX callback frame type %d\n", type);
1555 break;
1556 }
1557 }
1558
1559
1560 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1561 struct hostapd_frame_info *hfi,
1562 enum ieee80211_msg_type msg_type)
1563 {
1564 struct ieee80211_hdr *hdr;
1565 u16 fc, type, stype;
1566 size_t data_len = len;
1567 struct hostapd_data *hapd = NULL;
1568 int broadcast_bssid = 0;
1569 size_t i;
1570 u8 *bssid;
1571
1572 /*
1573 * PS-Poll frames are 16 bytes. All other frames are
1574 * 24 bytes or longer.
1575 */
1576 if (len < 16)
1577 return;
1578
1579 hdr = (struct ieee80211_hdr *) buf;
1580 fc = le_to_host16(hdr->frame_control);
1581
1582 type = WLAN_FC_GET_TYPE(fc);
1583 stype = WLAN_FC_GET_STYPE(fc);
1584
1585 switch (type) {
1586 case WLAN_FC_TYPE_DATA:
1587 if (len < 24)
1588 return;
1589 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1590 case WLAN_FC_TODS:
1591 bssid = hdr->addr1;
1592 break;
1593 default:
1594 /* discard */
1595 return;
1596 }
1597 break;
1598 case WLAN_FC_TYPE_CTRL:
1599 /* discard non-ps-poll frames */
1600 if (stype != WLAN_FC_STYPE_PSPOLL)
1601 return;
1602 bssid = hdr->addr1;
1603 break;
1604 case WLAN_FC_TYPE_MGMT:
1605 bssid = hdr->addr3;
1606 break;
1607 default:
1608 /* discard */
1609 return;
1610 }
1611
1612 /* find interface frame belongs to */
1613 for (i = 0; i < iface->num_bss; i++) {
1614 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1615 hapd = iface->bss[i];
1616 break;
1617 }
1618 }
1619
1620 if (hapd == NULL) {
1621 hapd = iface->bss[0];
1622
1623 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1624 bssid[2] != 0xff || bssid[3] != 0xff ||
1625 bssid[4] != 0xff || bssid[5] != 0xff) {
1626 /*
1627 * Unknown BSSID - drop frame if this is not from
1628 * passive scanning or a beacon (at least ProbeReq
1629 * frames to other APs may be allowed through RX
1630 * filtering in the wlan hw/driver)
1631 */
1632 if ((type != WLAN_FC_TYPE_MGMT ||
1633 stype != WLAN_FC_STYPE_BEACON))
1634 return;
1635 } else
1636 broadcast_bssid = 1;
1637 }
1638
1639 switch (msg_type) {
1640 case ieee80211_msg_normal:
1641 /* continue processing */
1642 break;
1643 case ieee80211_msg_tx_callback_ack:
1644 handle_tx_callback(hapd, buf, data_len, 1);
1645 return;
1646 case ieee80211_msg_tx_callback_fail:
1647 handle_tx_callback(hapd, buf, data_len, 0);
1648 return;
1649 }
1650
1651 switch (type) {
1652 case WLAN_FC_TYPE_MGMT:
1653 if (stype != WLAN_FC_STYPE_BEACON &&
1654 stype != WLAN_FC_STYPE_PROBE_REQ)
1655 wpa_printf(MSG_MSGDUMP, "MGMT");
1656 if (broadcast_bssid) {
1657 for (i = 0; i < iface->num_bss; i++)
1658 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1659 stype, hfi);
1660 } else
1661 ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1662 break;
1663 case WLAN_FC_TYPE_CTRL:
1664 /* can only get here with PS-Poll frames */
1665 wpa_printf(MSG_DEBUG, "CTRL");
1666 handle_unknown_sta(hapd, hdr->addr2);
1667 break;
1668 case WLAN_FC_TYPE_DATA:
1669 wpa_printf(MSG_DEBUG, "DATA");
1670 handle_unknown_sta(hapd, hdr->addr2);
1671 break;
1672 }
1673 }
1674
1675
1676 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1677 {
1678 struct i802_driver_data *drv = eloop_ctx;
1679 struct hostapd_data *hapd = drv->hapd;
1680 struct sockaddr_ll lladdr;
1681 unsigned char buf[3000];
1682 int len;
1683 socklen_t fromlen = sizeof(lladdr);
1684
1685 len = recvfrom(sock, buf, sizeof(buf), 0,
1686 (struct sockaddr *)&lladdr, &fromlen);
1687 if (len < 0) {
1688 perror("recv");
1689 return;
1690 }
1691
1692 if (have_ifidx(drv, lladdr.sll_ifindex))
1693 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1694 }
1695
1696
1697 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1698 {
1699 struct i802_driver_data *drv = eloop_ctx;
1700 int len;
1701 unsigned char buf[3000];
1702 struct hostapd_data *hapd = drv->hapd;
1703 struct ieee80211_radiotap_iterator iter;
1704 int ret;
1705 struct hostapd_frame_info hfi;
1706 int injected = 0, failed = 0, msg_type, rxflags = 0;
1707
1708 len = recv(sock, buf, sizeof(buf), 0);
1709 if (len < 0) {
1710 perror("recv");
1711 return;
1712 }
1713
1714 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1715 printf("received invalid radiotap frame\n");
1716 return;
1717 }
1718
1719 memset(&hfi, 0, sizeof(hfi));
1720
1721 while (1) {
1722 ret = ieee80211_radiotap_iterator_next(&iter);
1723 if (ret == -ENOENT)
1724 break;
1725 if (ret) {
1726 printf("received invalid radiotap frame (%d)\n", ret);
1727 return;
1728 }
1729 switch (iter.this_arg_index) {
1730 case IEEE80211_RADIOTAP_FLAGS:
1731 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1732 len -= 4;
1733 break;
1734 case IEEE80211_RADIOTAP_RX_FLAGS:
1735 rxflags = 1;
1736 break;
1737 case IEEE80211_RADIOTAP_TX_FLAGS:
1738 injected = 1;
1739 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1740 IEEE80211_RADIOTAP_F_TX_FAIL;
1741 break;
1742 case IEEE80211_RADIOTAP_DATA_RETRIES:
1743 break;
1744 case IEEE80211_RADIOTAP_CHANNEL:
1745 /* TODO convert from freq/flags to channel number
1746 hfi.channel = XXX;
1747 hfi.phytype = XXX;
1748 */
1749 break;
1750 case IEEE80211_RADIOTAP_RATE:
1751 hfi.datarate = *iter.this_arg * 5;
1752 break;
1753 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1754 hfi.ssi_signal = *iter.this_arg;
1755 break;
1756 }
1757 }
1758
1759 if (rxflags && injected)
1760 return;
1761
1762 if (!injected)
1763 msg_type = ieee80211_msg_normal;
1764 else if (failed)
1765 msg_type = ieee80211_msg_tx_callback_fail;
1766 else
1767 msg_type = ieee80211_msg_tx_callback_ack;
1768
1769 handle_frame(hapd->iface, buf + iter.max_length,
1770 len - iter.max_length, &hfi, msg_type);
1771 }
1772
1773
1774 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1775 {
1776 char buf[IFNAMSIZ];
1777 struct sockaddr_ll ll;
1778 int optval;
1779 socklen_t optlen;
1780
1781 snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1782 buf[IFNAMSIZ - 1] = '\0';
1783
1784 drv->monitor_ifidx =
1785 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1786
1787 if (drv->monitor_ifidx < 0)
1788 return -1;
1789
1790 if (hostapd_set_iface_flags(drv, buf, 1))
1791 goto error;
1792
1793 memset(&ll, 0, sizeof(ll));
1794 ll.sll_family = AF_PACKET;
1795 ll.sll_ifindex = drv->monitor_ifidx;
1796 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1797 if (drv->monitor_sock < 0) {
1798 perror("socket[PF_PACKET,SOCK_RAW]");
1799 goto error;
1800 }
1801
1802 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1803 sizeof(ll)) < 0) {
1804 perror("monitor socket bind");
1805 goto error;
1806 }
1807
1808 optlen = sizeof(optval);
1809 optval = 20;
1810 if (setsockopt
1811 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1812 perror("Failed to set socket priority");
1813 goto error;
1814 }
1815
1816 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1817 drv, NULL)) {
1818 printf("Could not register monitor read socket\n");
1819 goto error;
1820 }
1821
1822 return 0;
1823 error:
1824 nl80211_remove_iface(drv, drv->monitor_ifidx);
1825 return -1;
1826 }
1827
1828
1829 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1830 const char *ifname)
1831 {
1832 struct nl_msg *msg;
1833
1834 msg = nlmsg_alloc();
1835 if (!msg)
1836 return -1;
1837
1838 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1839 0, NL80211_CMD_SET_INTERFACE, 0);
1840 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1841 if_nametoindex(ifname));
1842 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1843
1844 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1845 nl_wait_for_ack(drv->nl_handle) < 0) {
1846 nla_put_failure:
1847 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1848 "mode.", ifname);
1849 nlmsg_free(msg);
1850 return -1;
1851 }
1852
1853 nlmsg_free(msg);
1854
1855 return 0;
1856 }
1857
1858
1859 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1860 {
1861 struct ifreq ifr;
1862 struct sockaddr_ll addr;
1863
1864 drv->ioctl_sock = -1;
1865
1866 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1867 if (drv->ioctl_sock < 0) {
1868 perror("socket[PF_INET,SOCK_DGRAM]");
1869 return -1;
1870 }
1871
1872 /* start listening for EAPOL on the default AP interface */
1873 add_ifidx(drv, if_nametoindex(drv->iface));
1874
1875 if (hostapd_set_iface_flags(drv, drv->iface, 0))
1876 return -1;
1877
1878 if (bssid) {
1879 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1880 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1881 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1882
1883 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1884 perror("ioctl(SIOCSIFHWADDR)");
1885 return -1;
1886 }
1887 }
1888
1889 /*
1890 * initialise generic netlink and nl80211
1891 */
1892 drv->nl_handle = nl_handle_alloc();
1893 if (!drv->nl_handle) {
1894 printf("Failed to allocate netlink handle.\n");
1895 return -1;
1896 }
1897
1898 if (genl_connect(drv->nl_handle)) {
1899 printf("Failed to connect to generic netlink.\n");
1900 return -1;
1901 }
1902
1903 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1904 if (!drv->nl_cache) {
1905 printf("Failed to allocate generic netlink cache.\n");
1906 return -1;
1907 }
1908
1909 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1910 if (!drv->nl80211) {
1911 printf("nl80211 not found.\n");
1912 return -1;
1913 }
1914
1915 /* Initialise a monitor interface */
1916 if (nl80211_create_monitor_interface(drv))
1917 return -1;
1918
1919 if (nl80211_set_master_mode(drv, drv->iface))
1920 return -1;
1921
1922 if (hostapd_set_iface_flags(drv, drv->iface, 1))
1923 return -1;
1924
1925 memset(&addr, 0, sizeof(addr));
1926 addr.sll_family = AF_PACKET;
1927 addr.sll_ifindex = ifr.ifr_ifindex;
1928 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1929 addr.sll_ifindex);
1930
1931 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1932 if (drv->eapol_sock < 0) {
1933 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1934 return -1;
1935 }
1936
1937 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1938 {
1939 printf("Could not register read socket for eapol\n");
1940 return -1;
1941 }
1942
1943 memset(&ifr, 0, sizeof(ifr));
1944 os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1945 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1946 perror("ioctl(SIOCGIFHWADDR)");
1947 return -1;
1948 }
1949
1950 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
1951 printf("Invalid HW-addr family 0x%04x\n",
1952 ifr.ifr_hwaddr.sa_family);
1953 return -1;
1954 }
1955 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
1956
1957 return 0;
1958 }
1959
1960
1961 static int i802_get_inact_sec(void *priv, const u8 *addr)
1962 {
1963 struct hostap_sta_driver_data data;
1964 int ret;
1965
1966 data.inactive_msec = (unsigned long) -1;
1967 ret = i802_read_sta_data(priv, &data, addr);
1968 if (ret || data.inactive_msec == (unsigned long) -1)
1969 return -1;
1970 return data.inactive_msec / 1000;
1971 }
1972
1973
1974 static int i802_sta_clear_stats(void *priv, const u8 *addr)
1975 {
1976 #if 0
1977 /* TODO */
1978 #endif
1979 return 0;
1980 }
1981
1982
1983 static void
1984 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
1985 char *custom)
1986 {
1987 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
1988
1989 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
1990 char *pos;
1991 u8 addr[ETH_ALEN];
1992 pos = strstr(custom, "addr=");
1993 if (pos == NULL) {
1994 wpa_printf(MSG_DEBUG,
1995 "MLME-MICHAELMICFAILURE.indication "
1996 "without sender address ignored");
1997 return;
1998 }
1999 pos += 5;
2000 if (hwaddr_aton(pos, addr) == 0) {
2001 ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2002 } else {
2003 wpa_printf(MSG_DEBUG,
2004 "MLME-MICHAELMICFAILURE.indication "
2005 "with invalid MAC address");
2006 }
2007 }
2008 }
2009
2010
2011 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2012 char *data, int len)
2013 {
2014 struct iw_event iwe_buf, *iwe = &iwe_buf;
2015 char *pos, *end, *custom, *buf;
2016
2017 pos = data;
2018 end = data + len;
2019
2020 while (pos + IW_EV_LCP_LEN <= end) {
2021 /* Event data may be unaligned, so make a local, aligned copy
2022 * before processing. */
2023 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2024 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2025 iwe->cmd, iwe->len);
2026 if (iwe->len <= IW_EV_LCP_LEN)
2027 return;
2028
2029 custom = pos + IW_EV_POINT_LEN;
2030 if (drv->we_version > 18 &&
2031 (iwe->cmd == IWEVMICHAELMICFAILURE ||
2032 iwe->cmd == IWEVCUSTOM)) {
2033 /* WE-19 removed the pointer from struct iw_point */
2034 char *dpos = (char *) &iwe_buf.u.data.length;
2035 int dlen = dpos - (char *) &iwe_buf;
2036 memcpy(dpos, pos + IW_EV_LCP_LEN,
2037 sizeof(struct iw_event) - dlen);
2038 } else {
2039 memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2040 custom += IW_EV_POINT_OFF;
2041 }
2042
2043 switch (iwe->cmd) {
2044 case IWEVCUSTOM:
2045 if (custom + iwe->u.data.length > end)
2046 return;
2047 buf = malloc(iwe->u.data.length + 1);
2048 if (buf == NULL)
2049 return;
2050 memcpy(buf, custom, iwe->u.data.length);
2051 buf[iwe->u.data.length] = '\0';
2052 hostapd_wireless_event_wireless_custom(drv, buf);
2053 free(buf);
2054 break;
2055 }
2056
2057 pos += iwe->len;
2058 }
2059 }
2060
2061
2062 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2063 struct nlmsghdr *h, int len)
2064 {
2065 struct ifinfomsg *ifi;
2066 int attrlen, nlmsg_len, rta_len;
2067 struct rtattr *attr;
2068
2069 if (len < (int) sizeof(*ifi))
2070 return;
2071
2072 ifi = NLMSG_DATA(h);
2073
2074 /* TODO: use ifi->ifi_index to filter out wireless events from other
2075 * interfaces */
2076
2077 nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2078
2079 attrlen = h->nlmsg_len - nlmsg_len;
2080 if (attrlen < 0)
2081 return;
2082
2083 attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2084
2085 rta_len = RTA_ALIGN(sizeof(struct rtattr));
2086 while (RTA_OK(attr, attrlen)) {
2087 if (attr->rta_type == IFLA_WIRELESS) {
2088 hostapd_wireless_event_wireless(
2089 drv, ((char *) attr) + rta_len,
2090 attr->rta_len - rta_len);
2091 }
2092 attr = RTA_NEXT(attr, attrlen);
2093 }
2094 }
2095
2096
2097 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2098 void *sock_ctx)
2099 {
2100 char buf[256];
2101 int left;
2102 struct sockaddr_nl from;
2103 socklen_t fromlen;
2104 struct nlmsghdr *h;
2105 struct i802_driver_data *drv = eloop_ctx;
2106
2107 fromlen = sizeof(from);
2108 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2109 (struct sockaddr *) &from, &fromlen);
2110 if (left < 0) {
2111 if (errno != EINTR && errno != EAGAIN)
2112 perror("recvfrom(netlink)");
2113 return;
2114 }
2115
2116 h = (struct nlmsghdr *) buf;
2117 while (left >= (int) sizeof(*h)) {
2118 int len, plen;
2119
2120 len = h->nlmsg_len;
2121 plen = len - sizeof(*h);
2122 if (len > left || plen < 0) {
2123 printf("Malformed netlink message: "
2124 "len=%d left=%d plen=%d\n",
2125 len, left, plen);
2126 break;
2127 }
2128
2129 switch (h->nlmsg_type) {
2130 case RTM_NEWLINK:
2131 hostapd_wireless_event_rtm_newlink(drv, h, plen);
2132 break;
2133 }
2134
2135 len = NLMSG_ALIGN(len);
2136 left -= len;
2137 h = (struct nlmsghdr *) ((char *) h + len);
2138 }
2139
2140 if (left > 0) {
2141 printf("%d extra bytes in the end of netlink message\n", left);
2142 }
2143 }
2144
2145
2146 static int hostap_get_we_version(struct i802_driver_data *drv)
2147 {
2148 struct iw_range *range;
2149 struct iwreq iwr;
2150 int minlen;
2151 size_t buflen;
2152
2153 drv->we_version = 0;
2154
2155 /*
2156 * Use larger buffer than struct iw_range in order to allow the
2157 * structure to grow in the future.
2158 */
2159 buflen = sizeof(struct iw_range) + 500;
2160 range = os_zalloc(buflen);
2161 if (range == NULL)
2162 return -1;
2163
2164 memset(&iwr, 0, sizeof(iwr));
2165 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2166 iwr.u.data.pointer = (caddr_t) range;
2167 iwr.u.data.length = buflen;
2168
2169 minlen = ((char *) &range->enc_capa) - (char *) range +
2170 sizeof(range->enc_capa);
2171
2172 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2173 perror("ioctl[SIOCGIWRANGE]");
2174 free(range);
2175 return -1;
2176 } else if (iwr.u.data.length >= minlen &&
2177 range->we_version_compiled >= 18) {
2178 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2179 "WE(source)=%d enc_capa=0x%x",
2180 range->we_version_compiled,
2181 range->we_version_source,
2182 range->enc_capa);
2183 drv->we_version = range->we_version_compiled;
2184 }
2185
2186 free(range);
2187 return 0;
2188 }
2189
2190
2191 static int i802_wireless_event_init(void *priv)
2192 {
2193 struct i802_driver_data *drv = priv;
2194 int s;
2195 struct sockaddr_nl local;
2196
2197 hostap_get_we_version(drv);
2198
2199 drv->wext_sock = -1;
2200
2201 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2202 if (s < 0) {
2203 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2204 return -1;
2205 }
2206
2207 memset(&local, 0, sizeof(local));
2208 local.nl_family = AF_NETLINK;
2209 local.nl_groups = RTMGRP_LINK;
2210 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2211 perror("bind(netlink)");
2212 close(s);
2213 return -1;
2214 }
2215
2216 eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2217 NULL);
2218 drv->wext_sock = s;
2219
2220 return 0;
2221 }
2222
2223
2224 static void i802_wireless_event_deinit(void *priv)
2225 {
2226 struct i802_driver_data *drv = priv;
2227 if (drv->wext_sock < 0)
2228 return;
2229 eloop_unregister_read_sock(drv->wext_sock);
2230 close(drv->wext_sock);
2231 }
2232
2233
2234 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2235 {
2236 struct i802_driver_data *drv = priv;
2237 struct ieee80211_mgmt mgmt;
2238
2239 memset(&mgmt, 0, sizeof(mgmt));
2240 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2241 WLAN_FC_STYPE_DEAUTH);
2242 memcpy(mgmt.da, addr, ETH_ALEN);
2243 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2244 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2245 mgmt.u.deauth.reason_code = host_to_le16(reason);
2246 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2247 sizeof(mgmt.u.deauth), 0);
2248 }
2249
2250
2251 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2252 {
2253 struct i802_driver_data *drv = priv;
2254 struct ieee80211_mgmt mgmt;
2255
2256 memset(&mgmt, 0, sizeof(mgmt));
2257 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2258 WLAN_FC_STYPE_DISASSOC);
2259 memcpy(mgmt.da, addr, ETH_ALEN);
2260 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2261 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2262 mgmt.u.disassoc.reason_code = host_to_le16(reason);
2263 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2264 sizeof(mgmt.u.disassoc), 0);
2265 }
2266
2267
2268 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2269 {
2270 struct i802_driver_data *drv;
2271
2272 drv = os_zalloc(sizeof(struct i802_driver_data));
2273 if (drv == NULL) {
2274 printf("Could not allocate memory for i802 driver data\n");
2275 return NULL;
2276 }
2277
2278 drv->hapd = hapd;
2279 memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2280
2281 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2282 drv->if_indices = drv->default_if_indices;
2283
2284 if (i802_init_sockets(drv, bssid))
2285 goto failed;
2286
2287 return drv;
2288
2289 failed:
2290 free(drv);
2291 return NULL;
2292 }
2293
2294
2295 static void *i802_init(struct hostapd_data *hapd)
2296 {
2297 return i802_init_bssid(hapd, NULL);
2298 }
2299
2300
2301 static void i802_deinit(void *priv)
2302 {
2303 struct i802_driver_data *drv = priv;
2304
2305 i802_del_beacon(drv);
2306
2307 /* remove monitor interface */
2308 nl80211_remove_iface(drv, drv->monitor_ifidx);
2309
2310 (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2311
2312 if (drv->monitor_sock >= 0) {
2313 eloop_unregister_read_sock(drv->monitor_sock);
2314 close(drv->monitor_sock);
2315 }
2316 if (drv->ioctl_sock >= 0)
2317 close(drv->ioctl_sock);
2318 if (drv->eapol_sock >= 0) {
2319 eloop_unregister_read_sock(drv->eapol_sock);
2320 close(drv->eapol_sock);
2321 }
2322
2323 genl_family_put(drv->nl80211);
2324 nl_cache_free(drv->nl_cache);
2325 nl_handle_destroy(drv->nl_handle);
2326
2327 if (drv->if_indices != drv->default_if_indices)
2328 free(drv->if_indices);
2329
2330 free(drv);
2331 }
2332
2333
2334 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2335 .name = "nl80211",
2336 .init = i802_init,
2337 // .init_bssid = i802_init_bssid,
2338 .deinit = i802_deinit,
2339 .wireless_event_init = i802_wireless_event_init,
2340 .wireless_event_deinit = i802_wireless_event_deinit,
2341 .set_ieee8021x = i802_set_ieee8021x,
2342 .set_privacy = i802_set_privacy,
2343 .set_encryption = i802_set_encryption,
2344 .get_seqnum = i802_get_seqnum,
2345 .flush = i802_flush,
2346 .read_sta_data = i802_read_sta_data,
2347 .send_eapol = i802_send_eapol,
2348 .sta_set_flags = i802_sta_set_flags,
2349 .sta_deauth = i802_sta_deauth,
2350 .sta_disassoc = i802_sta_disassoc,
2351 .sta_remove = i802_sta_remove,
2352 .set_ssid = i802_set_ssid,
2353 .send_mgmt_frame = i802_send_mgmt_frame,
2354 .sta_add = i802_sta_add,
2355 .get_inact_sec = i802_get_inact_sec,
2356 .sta_clear_stats = i802_sta_clear_stats,
2357 .set_freq = i802_set_freq,
2358 .set_rts = i802_set_rts,
2359 .get_rts = i802_get_rts,
2360 .set_frag = i802_set_frag,
2361 .get_frag = i802_get_frag,
2362 .set_retry = i802_set_retry,
2363 .get_retry = i802_get_retry,
2364 .set_rate_sets = i802_set_rate_sets,
2365 .set_channel_flag = i802_set_channel_flag,
2366 .set_regulatory_domain = i802_set_regulatory_domain,
2367 .set_beacon = i802_set_beacon,
2368 .set_internal_bridge = i802_set_internal_bridge,
2369 .set_beacon_int = i802_set_beacon_int,
2370 .set_dtim_period = i802_set_dtim_period,
2371 .set_cts_protect = i802_set_cts_protect,
2372 .set_preamble = i802_set_preamble,
2373 .set_short_slot_time = i802_set_short_slot_time,
2374 .set_tx_queue_params = i802_set_tx_queue_params,
2375 .bss_add = i802_bss_add,
2376 .bss_remove = i802_bss_remove,
2377 .if_add = i802_if_add,
2378 .if_update = i802_if_update,
2379 .if_remove = i802_if_remove,
2380 .get_hw_feature_data = i802_get_hw_feature_data,
2381 .set_sta_vlan = i802_set_sta_vlan,
2382 };
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