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Remove unused/unneeded IEEE 802.11n definitions
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
CommitLineData
3f5285e8 1/*
c5121837 2 * Driver interaction with Linux nl80211/cfg80211
072ad14c
JM		 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
3f5285e8
JM		 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>
37b7d082 22#include <net/if.h>
3f5285e8
JM		 23#include <netlink/genl/genl.h>
24#include <netlink/genl/family.h>
25#include <netlink/genl/ctrl.h>
7e45830a 26#include "nl80211_copy.h"
625f587b 27
3f5285e8
JM		 28#include "common.h"
29#include "driver.h"
30#include "eloop.h"
31#include "ieee802_11_defs.h"
32
c5121837 33#if defined(CONFIG_AP) || defined(HOSTAPD)
0915d02c
JM		 34#include <netpacket/packet.h>
35#include <linux/filter.h>
36#include "radiotap.h"
37#include "radiotap_iter.h"
c5121837 38
a8d6ffa4 39#include "../../hostapd/sta_flags.h"
4b9841d3 40#endif /* CONFIG_AP || HOSTAPD */
0915d02c 41
c5121837 42#ifdef HOSTAPD
c5121837 43#include "ieee802_11_common.h"
2e8eac2d 44#endif /* HOSTAPD */
c5121837
JM		 45
46#ifdef CONFIG_LIBNL20
47/* libnl 2.0 compatibility code */
2e8eac2d 48#define nl_handle nl_sock
c5121837
JM		 49#define nl_handle_alloc_cb nl_socket_alloc_cb
50#define nl_handle_destroy nl_socket_free
51#endif /* CONFIG_LIBNL20 */
52
c5121837 53
3f5285e8
JM		 54#ifndef IFF_LOWER_UP
55#define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
56#endif
57#ifndef IFF_DORMANT
58#define IFF_DORMANT 0x20000 /* driver signals dormant */
59#endif
60
61#ifndef IF_OPER_DORMANT
62#define IF_OPER_DORMANT 5
63#endif
64#ifndef IF_OPER_UP
65#define IF_OPER_UP 6
66#endif
67
c5121837
JM		 68struct i802_bss {
69 struct i802_bss *next;
b4fd6fab 70 int ifindex;
c5121837
JM		 71 unsigned int beacon_set:1;
72};
3f5285e8
JM		 73
74struct wpa_driver_nl80211_data {
75 void *ctx;
d8816397 76 int link_event_sock;
c5121837 77 int ioctl_sock; /* socket for ioctl() use */
3f5285e8
JM		 78 char ifname[IFNAMSIZ + 1];
79 int ifindex;
7524cfb1 80 int if_removed;
c2a04078
JM		 81 struct wpa_driver_capa capa;
82 int has_capability;
c2a04078 83
3f5285e8
JM		 84 int operstate;
85
3f5285e8
JM		 86 int scan_complete_events;
87
88 struct nl_handle *nl_handle;
335ce76b 89 struct nl_handle *nl_handle_event;
3f5285e8 90 struct nl_cache *nl_cache;
335ce76b 91 struct nl_cache *nl_cache_event;
3f5285e8
JM		 92 struct nl_cb *nl_cb;
93 struct genl_family *nl80211;
1c873584 94
c2a04078
JM		 95 u8 bssid[ETH_ALEN];
96 int associated;
fd05d64e
JM		 97 u8 ssid[32];
98 size_t ssid_len;
ad1e68e6
JM		 99 int nlmode;
100 int ap_scan_as_station;
d2440ba0 101
0915d02c
JM		 102 int monitor_sock;
103 int monitor_ifidx;
7da3abe7 104
7da3abe7 105 unsigned int beacon_set:1;
c5121837
JM		 106
107#ifdef HOSTAPD
c5121837 108 int eapol_sock; /* socket for EAPOL frames */
c5121837
JM		 109
110 int default_if_indices[16];
111 int *if_indices;
112 int num_if_indices;
113
c5121837 114 struct i802_bss bss;
c5121837
JM		 115
116 int last_freq;
117 int last_freq_ht;
c5121837 118#endif /* HOSTAPD */
3f5285e8
JM		 119};
120
121
122static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
123 void *timeout_ctx);
ad1e68e6 124static int wpa_driver_nl80211_set_mode(void *priv, int mode);
362f781e 125static int
7524cfb1
JM		 126wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
127
460456f8
JM		 128#if defined(CONFIG_AP) || defined(HOSTAPD)
129static void nl80211_remove_monitor_interface(
130 struct wpa_driver_nl80211_data *drv);
131#endif /* CONFIG_AP || HOSTAPD */
132
0915d02c
JM		 133#ifdef CONFIG_AP
134static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
135 int ifidx);
136#endif /* CONFIG_AP */
137
072ad14c 138#ifdef HOSTAPD
2135f224
JM		 139static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
140static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
b4fd6fab
JM		 141static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
142 int ifindex);
bbaf0837
JM		 143static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
144 int ifidx);
145static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
072ad14c
JM		 146#endif /* HOSTAPD */
147
3f5285e8 148
6241fcb1
JM		 149/* nl80211 code */
150static int ack_handler(struct nl_msg *msg, void *arg)
151{
152 int *err = arg;
153 *err = 0;
154 return NL_STOP;
155}
156
157static int finish_handler(struct nl_msg *msg, void *arg)
158{
8e8df255
JM		 159 int *ret = arg;
160 *ret = 0;
6241fcb1
JM		 161 return NL_SKIP;
162}
163
164static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
165 void *arg)
166{
167 int *ret = arg;
168 *ret = err->error;
169 return NL_SKIP;
170}
171
5b7b85f6
JM		 172
173static int no_seq_check(struct nl_msg *msg, void *arg)
174{
175 return NL_OK;
176}
177
178
6241fcb1
JM		 179static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
180 struct nl_msg *msg,
181 int (*valid_handler)(struct nl_msg *, void *),
182 void *valid_data)
183{
184 struct nl_cb *cb;
185 int err = -ENOMEM;
186
187 cb = nl_cb_clone(drv->nl_cb);
188 if (!cb)
189 goto out;
190
191 err = nl_send_auto_complete(drv->nl_handle, msg);
192 if (err < 0)
193 goto out;
194
195 err = 1;
196
197 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
8e8df255 198 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
6241fcb1
JM		 199 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
200
201 if (valid_handler)
202 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
203 valid_handler, valid_data);
204
205 while (err > 0)
206 nl_recvmsgs(drv->nl_handle, cb);
207 out:
208 nl_cb_put(cb);
209 nlmsg_free(msg);
210 return err;
211}
212
213
97865538
JM		 214struct family_data {
215 const char *group;
216 int id;
217};
218
219
220static int family_handler(struct nl_msg *msg, void *arg)
221{
222 struct family_data *res = arg;
223 struct nlattr *tb[CTRL_ATTR_MAX + 1];
224 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
225 struct nlattr *mcgrp;
226 int i;
227
228 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
229 genlmsg_attrlen(gnlh, 0), NULL);
230 if (!tb[CTRL_ATTR_MCAST_GROUPS])
231 return NL_SKIP;
232
233 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
234 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
235 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
236 nla_len(mcgrp), NULL);
237 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
238 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
239 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
240 res->group,
241 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
242 continue;
243 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
244 break;
245 };
246
247 return NL_SKIP;
248}
249
250
251static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
252 const char *family, const char *group)
253{
254 struct nl_msg *msg;
255 int ret = -1;
256 struct family_data res = { group, -ENOENT };
257
258 msg = nlmsg_alloc();
259 if (!msg)
260 return -ENOMEM;
261 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
262 0, 0, CTRL_CMD_GETFAMILY, 0);
263 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
264
265 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
266 msg = NULL;
267 if (ret == 0)
268 ret = res.id;
269
270nla_put_failure:
271 nlmsg_free(msg);
272 return ret;
273}
274
275
41d931ee
JM		 276#ifdef HOSTAPD
277static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
278 const char *ifname, u8 *addr)
279{
280 struct ifreq ifr;
281
282 os_memset(&ifr, 0, sizeof(ifr));
283 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
284 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
285 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
286 ifname, errno, strerror(errno));
287 return -1;
288 }
289
290 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
291 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
292 ifname, ifr.ifr_hwaddr.sa_family);
293 return -1;
294 }
295 os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
296
297 return 0;
298}
299
300
301static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
302 const char *ifname, const u8 *addr)
303{
304 struct ifreq ifr;
305
306 os_memset(&ifr, 0, sizeof(ifr));
307 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
308 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
309 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
310
311 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
312 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
313 ifname, errno, strerror(errno));
314 return -1;
315 }
316
317 return 0;
318}
319#endif /* HOSTAPD */
320
321
3f5285e8
JM		 322static int wpa_driver_nl80211_send_oper_ifla(
323 struct wpa_driver_nl80211_data *drv,
324 int linkmode, int operstate)
325{
326 struct {
327 struct nlmsghdr hdr;
328 struct ifinfomsg ifinfo;
329 char opts[16];
330 } req;
331 struct rtattr *rta;
332 static int nl_seq;
333 ssize_t ret;
334
335 os_memset(&req, 0, sizeof(req));
336
337 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
338 req.hdr.nlmsg_type = RTM_SETLINK;
339 req.hdr.nlmsg_flags = NLM_F_REQUEST;
340 req.hdr.nlmsg_seq = ++nl_seq;
341 req.hdr.nlmsg_pid = 0;
342
343 req.ifinfo.ifi_family = AF_UNSPEC;
344 req.ifinfo.ifi_type = 0;
345 req.ifinfo.ifi_index = drv->ifindex;
346 req.ifinfo.ifi_flags = 0;
347 req.ifinfo.ifi_change = 0;
348
349 if (linkmode != -1) {
0ae7b086
JM		 350 rta = aliasing_hide_typecast(
351 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
352 struct rtattr);
3f5285e8
JM		 353 rta->rta_type = IFLA_LINKMODE;
354 rta->rta_len = RTA_LENGTH(sizeof(char));
355 *((char *) RTA_DATA(rta)) = linkmode;
356 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
357 RTA_LENGTH(sizeof(char));
358 }
359 if (operstate != -1) {
c1bb3e0a
JM		 360 rta = aliasing_hide_typecast(
361 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
362 struct rtattr);
3f5285e8
JM		 363 rta->rta_type = IFLA_OPERSTATE;
364 rta->rta_len = RTA_LENGTH(sizeof(char));
365 *((char *) RTA_DATA(rta)) = operstate;
366 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
367 RTA_LENGTH(sizeof(char));
368 }
369
7da3abe7 370 wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
3f5285e8
JM		 371 linkmode, operstate);
372
d8816397 373 ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
3f5285e8 374 if (ret < 0) {
7da3abe7
JM		 375 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
376 " %s (assume operstate is not supported)",
3f5285e8
JM		 377 strerror(errno));
378 }
379
380 return ret < 0 ? -1 : 0;
381}
382
383
3f5285e8
JM		 384static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
385{
386 struct wpa_driver_nl80211_data *drv = priv;
c2a04078
JM		 387 if (!drv->associated)
388 return -1;
389 os_memcpy(bssid, drv->bssid, ETH_ALEN);
390 return 0;
3f5285e8
JM		 391}
392
393
3f5285e8
JM		 394static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
395{
396 struct wpa_driver_nl80211_data *drv = priv;
fd05d64e
JM		 397 if (!drv->associated)
398 return -1;
399 os_memcpy(ssid, drv->ssid, drv->ssid_len);
400 return drv->ssid_len;
3f5285e8
JM		 401}
402
403
c1bb3e0a
JM		 404#ifndef HOSTAPD
405
7524cfb1
JM		 406static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
407 void *ctx, char *buf, size_t len,
408 int del)
3f5285e8
JM		 409{
410 union wpa_event_data event;
411
412 os_memset(&event, 0, sizeof(event));
413 if (len > sizeof(event.interface_status.ifname))
414 len = sizeof(event.interface_status.ifname) - 1;
415 os_memcpy(event.interface_status.ifname, buf, len);
416 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
417 EVENT_INTERFACE_ADDED;
418
419 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
420 del ? "DEL" : "NEW",
421 event.interface_status.ifname,
422 del ? "removed" : "added");
423
7524cfb1
JM		 424 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
425 if (del)
426 drv->if_removed = 1;
427 else
428 drv->if_removed = 0;
429 }
430
3f5285e8
JM		 431 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
432}
433
434
7524cfb1
JM		 435static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
436 struct nlmsghdr *h)
437{
438 struct ifinfomsg *ifi;
439 int attrlen, _nlmsg_len, rta_len;
440 struct rtattr *attr;
441
442 ifi = NLMSG_DATA(h);
443
444 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
445
446 attrlen = h->nlmsg_len - _nlmsg_len;
447 if (attrlen < 0)
448 return 0;
449
450 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
451
452 rta_len = RTA_ALIGN(sizeof(struct rtattr));
453 while (RTA_OK(attr, attrlen)) {
454 if (attr->rta_type == IFLA_IFNAME) {
455 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
456 == 0)
457 return 1;
458 else
459 break;
460 }
461 attr = RTA_NEXT(attr, attrlen);
462 }
463
464 return 0;
465}
466
467
468static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
469 int ifindex, struct nlmsghdr *h)
470{
471 if (drv->ifindex == ifindex)
472 return 1;
473
474 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
475 drv->ifindex = if_nametoindex(drv->ifname);
476 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
477 "interface");
478 wpa_driver_nl80211_finish_drv_init(drv);
479 return 1;
480 }
481
482 return 0;
483}
484
485
3f5285e8
JM		 486static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
487 void *ctx, struct nlmsghdr *h,
488 size_t len)
489{
490 struct ifinfomsg *ifi;
491 int attrlen, _nlmsg_len, rta_len;
492 struct rtattr * attr;
493
494 if (len < sizeof(*ifi))
495 return;
496
497 ifi = NLMSG_DATA(h);
498
7524cfb1 499 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
3f5285e8
JM		 500 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
501 ifi->ifi_index);
502 return;
503 }
504
505 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
506 "(%s%s%s%s)",
507 drv->operstate, ifi->ifi_flags,
508 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
509 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
510 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
511 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
512 /*
513 * Some drivers send the association event before the operup event--in
514 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
515 * fails. This will hit us when wpa_supplicant does not need to do
516 * IEEE 802.1X authentication
517 */
518 if (drv->operstate == 1 &&
519 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
520 !(ifi->ifi_flags & IFF_RUNNING))
521 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
522
523 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
524
525 attrlen = h->nlmsg_len - _nlmsg_len;
526 if (attrlen < 0)
527 return;
528
529 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
530
531 rta_len = RTA_ALIGN(sizeof(struct rtattr));
532 while (RTA_OK(attr, attrlen)) {
d8816397 533 if (attr->rta_type == IFLA_IFNAME) {
7524cfb1
JM		 534 wpa_driver_nl80211_event_link(
535 drv, ctx,
536 ((char *) attr) + rta_len,
537 attr->rta_len - rta_len, 0);
3f5285e8
JM		 538 }
539 attr = RTA_NEXT(attr, attrlen);
540 }
541}
542
543
544static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
545 void *ctx, struct nlmsghdr *h,
546 size_t len)
547{
548 struct ifinfomsg *ifi;
549 int attrlen, _nlmsg_len, rta_len;
550 struct rtattr * attr;
551
552 if (len < sizeof(*ifi))
553 return;
554
555 ifi = NLMSG_DATA(h);
556
557 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
558
559 attrlen = h->nlmsg_len - _nlmsg_len;
560 if (attrlen < 0)
561 return;
562
563 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
564
565 rta_len = RTA_ALIGN(sizeof(struct rtattr));
566 while (RTA_OK(attr, attrlen)) {
567 if (attr->rta_type == IFLA_IFNAME) {
7524cfb1
JM		 568 wpa_driver_nl80211_event_link(
569 drv, ctx,
570 ((char *) attr) + rta_len,
571 attr->rta_len - rta_len, 1);
3f5285e8
JM		 572 }
573 attr = RTA_NEXT(attr, attrlen);
574 }
575}
576
577
d8816397 578static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
97865538 579 void *sock_ctx)
3f5285e8
JM		 580{
581 char buf[8192];
582 int left;
583 struct sockaddr_nl from;
584 socklen_t fromlen;
585 struct nlmsghdr *h;
586 int max_events = 10;
587
588try_again:
589 fromlen = sizeof(from);
590 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
591 (struct sockaddr *) &from, &fromlen);
592 if (left < 0) {
593 if (errno != EINTR && errno != EAGAIN)
594 perror("recvfrom(netlink)");
595 return;
596 }
597
598 h = (struct nlmsghdr *) buf;
599 while (left >= (int) sizeof(*h)) {
600 int len, plen;
601
602 len = h->nlmsg_len;
603 plen = len - sizeof(*h);
604 if (len > left || plen < 0) {
605 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
606 "len=%d left=%d plen=%d",
607 len, left, plen);
608 break;
609 }
610
611 switch (h->nlmsg_type) {
612 case RTM_NEWLINK:
613 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
614 h, plen);
615 break;
616 case RTM_DELLINK:
617 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
618 h, plen);
619 break;
620 }
621
622 len = NLMSG_ALIGN(len);
623 left -= len;
624 h = (struct nlmsghdr *) ((char *) h + len);
625 }
626
627 if (left > 0) {
628 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
629 "message", left);
630 }
631
632 if (--max_events > 0) {
633 /*
634 * Try to receive all events in one eloop call in order to
635 * limit race condition on cases where AssocInfo event, Assoc
636 * event, and EAPOL frames are received more or less at the
637 * same time. We want to process the event messages first
638 * before starting EAPOL processing.
639 */
640 goto try_again;
641 }
642}
643
c1bb3e0a
JM		 644#endif /* HOSTAPD */
645
3f5285e8 646
c2a04078
JM		 647static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
648 const u8 *frame, size_t len)
649{
650 const struct ieee80211_mgmt *mgmt;
651 union wpa_event_data event;
652
653 mgmt = (const struct ieee80211_mgmt *) frame;
654 if (len < 24 + sizeof(mgmt->u.auth)) {
655 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
656 "frame");
657 return;
658 }
659
660 os_memset(&event, 0, sizeof(event));
661 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
662 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
663 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
664 if (len > 24 + sizeof(mgmt->u.auth)) {
665 event.auth.ies = mgmt->u.auth.variable;
666 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
667 }
668
669 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
670}
671
672
673static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
674 const u8 *frame, size_t len)
675{
676 const struct ieee80211_mgmt *mgmt;
677 union wpa_event_data event;
678 u16 status;
679
680 mgmt = (const struct ieee80211_mgmt *) frame;
681 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
682 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
683 "frame");
684 return;
685 }
686
687 status = le_to_host16(mgmt->u.assoc_resp.status_code);
688 if (status != WLAN_STATUS_SUCCESS) {
efa46078
JM		 689 os_memset(&event, 0, sizeof(event));
690 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
691 event.assoc_reject.resp_ies =
692 (u8 *) mgmt->u.assoc_resp.variable;
693 event.assoc_reject.resp_ies_len =
694 len - 24 - sizeof(mgmt->u.assoc_resp);
695 }
696 event.assoc_reject.status_code = status;
697
698 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
c2a04078
JM		 699 return;
700 }
701
702 drv->associated = 1;
703 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
704
705 os_memset(&event, 0, sizeof(event));
706 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
707 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
708 event.assoc_info.resp_ies_len =
efa46078 709 len - 24 - sizeof(mgmt->u.assoc_resp);
c2a04078
JM		 710 }
711
712 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
713}
714
c1bb3e0a 715
da72a1c1
ZY		 716static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
717 enum nl80211_commands cmd, struct nlattr *status,
718 struct nlattr *addr, struct nlattr *req_ie,
719 struct nlattr *resp_ie)
720{
721 union wpa_event_data event;
722
7da2c527
JM		 723 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
724 /*
725 * Avoid reporting two association events that would confuse
726 * the core code.
727 */
728 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
729 "when using userspace SME", cmd);
730 return;
731 }
732
da72a1c1
ZY		 733 os_memset(&event, 0, sizeof(event));
734 if (cmd == NL80211_CMD_CONNECT &&
735 nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
736 if (resp_ie) {
737 event.assoc_reject.resp_ies = nla_data(resp_ie);
738 event.assoc_reject.resp_ies_len = nla_len(resp_ie);
739 }
740 event.assoc_reject.status_code = nla_get_u16(status);
741 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
742 return;
743 }
744
745 drv->associated = 1;
746 if (addr)
747 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
748
749 if (req_ie) {
750 event.assoc_info.req_ies = nla_data(req_ie);
751 event.assoc_info.req_ies_len = nla_len(req_ie);
752 }
753 if (resp_ie) {
754 event.assoc_info.resp_ies = nla_data(resp_ie);
755 event.assoc_info.resp_ies_len = nla_len(resp_ie);
756 }
757
758 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
759}
c2a04078 760
c1bb3e0a 761
da1fb17c
JM		 762static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
763 enum nl80211_commands cmd, struct nlattr *addr)
764{
765 union wpa_event_data event;
766 enum wpa_event_type ev;
767
768 if (nla_len(addr) != ETH_ALEN)
769 return;
770
771 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
772 cmd, MAC2STR((u8 *) nla_data(addr)));
773
774 if (cmd == NL80211_CMD_AUTHENTICATE)
775 ev = EVENT_AUTH_TIMED_OUT;
776 else if (cmd == NL80211_CMD_ASSOCIATE)
777 ev = EVENT_ASSOC_TIMED_OUT;
778 else
779 return;
780
781 os_memset(&event, 0, sizeof(event));
782 os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
783 wpa_supplicant_event(drv->ctx, ev, &event);
784}
785
786
c2a04078 787static void mlme_event(struct wpa_driver_nl80211_data *drv,
da1fb17c
JM		 788 enum nl80211_commands cmd, struct nlattr *frame,
789 struct nlattr *addr, struct nlattr *timed_out)
c2a04078 790{
da1fb17c
JM		 791 if (timed_out && addr) {
792 mlme_timeout_event(drv, cmd, addr);
793 return;
794 }
795
c2a04078
JM		 796 if (frame == NULL) {
797 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
798 "data", cmd);
799 return;
800 }
801
802 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
803 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
804 nla_data(frame), nla_len(frame));
805
806 switch (cmd) {
807 case NL80211_CMD_AUTHENTICATE:
808 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
809 break;
810 case NL80211_CMD_ASSOCIATE:
811 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
812 break;
813 case NL80211_CMD_DEAUTHENTICATE:
814 drv->associated = 0;
815 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
816 break;
817 case NL80211_CMD_DISASSOCIATE:
818 drv->associated = 0;
819 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
820 break;
821 default:
822 break;
823 }
824}
825
826
35583f3f
JM		 827static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
828 struct nlattr *tb[])
829{
830 union wpa_event_data data;
831
832 wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
833 os_memset(&data, 0, sizeof(data));
834 if (tb[NL80211_ATTR_MAC]) {
835 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
836 nla_data(tb[NL80211_ATTR_MAC]),
837 nla_len(tb[NL80211_ATTR_MAC]));
ad1e68e6 838 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
35583f3f
JM		 839 }
840 if (tb[NL80211_ATTR_KEY_SEQ]) {
841 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
842 nla_data(tb[NL80211_ATTR_KEY_SEQ]),
843 nla_len(tb[NL80211_ATTR_KEY_SEQ]));
844 }
845 if (tb[NL80211_ATTR_KEY_TYPE]) {
846 enum nl80211_key_type key_type =
847 nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
848 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
849 if (key_type == NL80211_KEYTYPE_PAIRWISE)
850 data.michael_mic_failure.unicast = 1;
851 } else
852 data.michael_mic_failure.unicast = 1;
853
854 if (tb[NL80211_ATTR_KEY_IDX]) {
855 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
856 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
857 }
858
859 wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
860}
861
862
97865538
JM		 863static int process_event(struct nl_msg *msg, void *arg)
864{
865 struct wpa_driver_nl80211_data *drv = arg;
866 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
867 struct nlattr *tb[NL80211_ATTR_MAX + 1];
868
869 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
870 genlmsg_attrlen(gnlh, 0), NULL);
871
872 if (tb[NL80211_ATTR_IFINDEX]) {
873 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
874 if (ifindex != drv->ifindex) {
875 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
876 " for foreign interface (ifindex %d)",
877 gnlh->cmd, ifindex);
878 return NL_SKIP;
879 }
880 }
881
ad1e68e6
JM		 882 if (drv->ap_scan_as_station &&
883 (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
884 gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
885 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
886 drv->ap_scan_as_station = 0;
887 }
888
97865538 889 switch (gnlh->cmd) {
d942a79e
JM		 890 case NL80211_CMD_TRIGGER_SCAN:
891 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
892 break;
97865538
JM		 893 case NL80211_CMD_NEW_SCAN_RESULTS:
894 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
895 drv->scan_complete_events = 1;
896 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
897 drv->ctx);
898 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
899 break;
900 case NL80211_CMD_SCAN_ABORTED:
901 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
902 /*
903 * Need to indicate that scan results are available in order
904 * not to make wpa_supplicant stop its scanning.
905 */
906 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
907 drv->ctx);
908 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
909 break;
c2a04078
JM		 910 case NL80211_CMD_AUTHENTICATE:
911 case NL80211_CMD_ASSOCIATE:
912 case NL80211_CMD_DEAUTHENTICATE:
913 case NL80211_CMD_DISASSOCIATE:
da1fb17c
JM		 914 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
915 tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
c2a04078 916 break;
da72a1c1
ZY		 917 case NL80211_CMD_CONNECT:
918 case NL80211_CMD_ROAM:
919 mlme_event_connect(drv, gnlh->cmd,
920 tb[NL80211_ATTR_STATUS_CODE],
921 tb[NL80211_ATTR_MAC],
922 tb[NL80211_ATTR_REQ_IE],
923 tb[NL80211_ATTR_RESP_IE]);
924 break;
925 case NL80211_CMD_DISCONNECT:
7da2c527
JM		 926 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
927 /*
928 * Avoid reporting two disassociation events that could
929 * confuse the core code.
930 */
931 wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
932 "event when using userspace SME");
933 break;
934 }
da72a1c1
ZY		 935 drv->associated = 0;
936 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
937 break;
35583f3f
JM		 938 case NL80211_CMD_MICHAEL_MIC_FAILURE:
939 mlme_event_michael_mic_failure(drv, tb);
940 break;
97865538 941 default:
c2a04078
JM		 942 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
943 "(cmd=%d)", gnlh->cmd);
97865538
JM		 944 break;
945 }
946
947 return NL_SKIP;
948}
949
950
951static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
952 void *sock_ctx)
953{
954 struct nl_cb *cb;
955 struct wpa_driver_nl80211_data *drv = eloop_ctx;
956
957 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
958
959 cb = nl_cb_clone(drv->nl_cb);
960 if (!cb)
961 return;
962 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
963 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
335ce76b 964 nl_recvmsgs(drv->nl_handle_event, cb);
97865538
JM		 965 nl_cb_put(cb);
966}
967
968
2135f224
JM		 969static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
970 const char *ifname, int dev_up)
3f5285e8
JM		 971{
972 struct ifreq ifr;
973
2135f224
JM		 974 if (drv->ioctl_sock < 0)
975 return -1;
976
3f5285e8
JM		 977 os_memset(&ifr, 0, sizeof(ifr));
978 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
2135f224
JM		 979
980 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
3f5285e8 981 perror("ioctl[SIOCGIFFLAGS]");
2135f224
JM		 982 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
983 ifname);
3f5285e8
JM		 984 return -1;
985 }
3f5285e8 986
2135f224
JM		 987 if (dev_up) {
988 if (ifr.ifr_flags & IFF_UP)
989 return 0;
990 ifr.ifr_flags |= IFF_UP;
991 } else {
992 if (!(ifr.ifr_flags & IFF_UP))
993 return 0;
994 ifr.ifr_flags &= ~IFF_UP;
995 }
3f5285e8 996
2135f224
JM		 997 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
998 perror("ioctl[SIOCSIFFLAGS]");
3f5285e8
JM		 999 return -1;
1000 }
3f5285e8 1001
2135f224 1002 return 0;
3f5285e8
JM		 1003}
1004
1005
6d158490
LR		 1006/**
1007 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1008 * @priv: driver_nl80211 private data
1009 * @alpha2_arg: country to which to switch to
1010 * Returns: 0 on success, -1 on failure
1011 *
1012 * This asks nl80211 to set the regulatory domain for given
1013 * country ISO / IEC alpha2.
1014 */
1015static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1016{
1017 struct wpa_driver_nl80211_data *drv = priv;
1018 char alpha2[3];
1019 struct nl_msg *msg;
1020
1021 msg = nlmsg_alloc();
1022 if (!msg)
e785c2ba 1023 return -ENOMEM;
6d158490
LR		 1024
1025 alpha2[0] = alpha2_arg[0];
1026 alpha2[1] = alpha2_arg[1];
1027 alpha2[2] = '\0';
1028
1029 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1030 0, NL80211_CMD_REQ_SET_REG, 0);
1031
1032 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1033 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1034 return -EINVAL;
1035 return 0;
1036nla_put_failure:
1037 return -EINVAL;
1038}
1039
1040
bbaf0837 1041#ifndef HOSTAPD
80bc75f1
JM		 1042struct wiphy_info_data {
1043 int max_scan_ssids;
1581b38b 1044 int ap_supported;
93d11400
ZY		 1045 int auth_supported;
1046 int connect_supported;
80bc75f1
JM		 1047};
1048
1049
1050static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1051{
1052 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1053 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1054 struct wiphy_info_data *info = arg;
1055
1056 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1057 genlmsg_attrlen(gnlh, 0), NULL);
1058
1059 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1060 info->max_scan_ssids =
1061 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1062
1581b38b
JM		 1063 if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1064 struct nlattr *nl_mode;
1065 int i;
1066 nla_for_each_nested(nl_mode,
1067 tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1068 if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1069 info->ap_supported = 1;
1070 break;
1071 }
1072 }
1073 }
1074
93d11400
ZY		 1075 if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1076 struct nlattr *nl_cmd;
1077 int i;
1078
1079 nla_for_each_nested(nl_cmd,
1080 tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1081 u32 cmd = nla_get_u32(nl_cmd);
1082 if (cmd == NL80211_CMD_AUTHENTICATE)
1083 info->auth_supported = 1;
1084 else if (cmd == NL80211_CMD_CONNECT)
1085 info->connect_supported = 1;
1086 }
1087 }
1088
80bc75f1
JM		 1089 return NL_SKIP;
1090}
1091
1092
1093static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1094 struct wiphy_info_data *info)
1095{
1096 struct nl_msg *msg;
1097
1098 os_memset(info, 0, sizeof(*info));
1099 msg = nlmsg_alloc();
1100 if (!msg)
1101 return -1;
1102
1103 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1104 0, NL80211_CMD_GET_WIPHY, 0);
1105
1106 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1107
1108 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1109 return 0;
1110 msg = NULL;
1111nla_put_failure:
1112 nlmsg_free(msg);
1113 return -1;
1114}
1115
1116
93d11400 1117static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
80bc75f1
JM		 1118{
1119 struct wiphy_info_data info;
1120 if (wpa_driver_nl80211_get_info(drv, &info))
93d11400 1121 return -1;
80bc75f1 1122 drv->has_capability = 1;
1b2a72e8
JM		 1123 /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1124 drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1125 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1126 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1127 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1128 drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1129 WPA_DRIVER_CAPA_ENC_WEP104 |
1130 WPA_DRIVER_CAPA_ENC_TKIP |
1131 WPA_DRIVER_CAPA_ENC_CCMP;
1132
80bc75f1 1133 drv->capa.max_scan_ssids = info.max_scan_ssids;
1581b38b
JM		 1134 if (info.ap_supported)
1135 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
93d11400
ZY		 1136
1137 if (info.auth_supported)
1138 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1139 else if (!info.connect_supported) {
1140 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1141 "authentication/association or connect commands");
1142 return -1;
1143 }
1144
0194fedb
JB		 1145 drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1146
93d11400 1147 return 0;
80bc75f1 1148}
bbaf0837 1149#endif /* HOSTAPD */
80bc75f1
JM		 1150
1151
9fff9fdc
JM		 1152static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1153 void *ctx)
3f5285e8 1154{
9fff9fdc 1155 int ret;
3f5285e8 1156
9fff9fdc 1157 /* Initialize generic netlink and nl80211 */
3f5285e8
JM		 1158
1159 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1160 if (drv->nl_cb == NULL) {
1161 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1162 "callbacks");
1163 goto err1;
1164 }
1165
1166 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1167 if (drv->nl_handle == NULL) {
1168 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1169 "callbacks");
1170 goto err2;
1171 }
1172
335ce76b
JM		 1173 drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1174 if (drv->nl_handle_event == NULL) {
1175 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1176 "callbacks (event)");
1177 goto err2b;
1178 }
1179
3f5285e8
JM		 1180 if (genl_connect(drv->nl_handle)) {
1181 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1182 "netlink");
1183 goto err3;
1184 }
1185
335ce76b
JM		 1186 if (genl_connect(drv->nl_handle_event)) {
1187 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1188 "netlink (event)");
1189 goto err3;
1190 }
1191
9fff9fdc
JM		 1192#ifdef CONFIG_LIBNL20
1193 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1194 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1195 "netlink cache");
1196 goto err3;
1197 }
335ce76b
JM		 1198 if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1199 0) {
1200 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1201 "netlink cache (event)");
1202 goto err3b;
1203 }
9fff9fdc 1204#else /* CONFIG_LIBNL20 */
3f5285e8
JM		 1205 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1206 if (drv->nl_cache == NULL) {
1207 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1208 "netlink cache");
1209 goto err3;
1210 }
335ce76b
JM		 1211 drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1212 if (drv->nl_cache_event == NULL) {
1213 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1214 "netlink cache (event)");
1215 goto err3b;
1216 }
9fff9fdc
JM		 1217#endif /* CONFIG_LIBNL20 */
1218
3f5285e8
JM		 1219 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1220 if (drv->nl80211 == NULL) {
1221 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1222 "found");
1223 goto err4;
1224 }
1225
97865538
JM		 1226 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1227 if (ret >= 0)
335ce76b 1228 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
97865538
JM		 1229 if (ret < 0) {
1230 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1231 "membership for scan events: %d (%s)",
1232 ret, strerror(-ret));
1233 goto err4;
1234 }
c2a04078
JM		 1235
1236 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1237 if (ret >= 0)
335ce76b 1238 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
c2a04078
JM		 1239 if (ret < 0) {
1240 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1241 "membership for mlme events: %d (%s)",
1242 ret, strerror(-ret));
1243 goto err4;
1244 }
c2a04078 1245
335ce76b 1246 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
97865538
JM		 1247 wpa_driver_nl80211_event_receive, drv, ctx);
1248
9fff9fdc
JM		 1249 return 0;
1250
1251err4:
335ce76b
JM		 1252 nl_cache_free(drv->nl_cache_event);
1253err3b:
9fff9fdc
JM		 1254 nl_cache_free(drv->nl_cache);
1255err3:
335ce76b
JM		 1256 nl_handle_destroy(drv->nl_handle_event);
1257err2b:
9fff9fdc
JM		 1258 nl_handle_destroy(drv->nl_handle);
1259err2:
1260 nl_cb_put(drv->nl_cb);
1261err1:
1262 return -1;
1263}
1264
1265
bbaf0837
JM		 1266static int wpa_driver_nl80211_init_link_events(
1267 struct wpa_driver_nl80211_data *drv)
1268{
1269#ifdef HOSTAPD
1270 return 0;
1271#else /* HOSTAPD */
1272 int s;
1273 struct sockaddr_nl local;
1274
1275 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1276 if (s < 0) {
1277 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
7af376e4 1278 return -1;
bbaf0837
JM		 1279 }
1280
1281 os_memset(&local, 0, sizeof(local));
1282 local.nl_family = AF_NETLINK;
1283 local.nl_groups = RTMGRP_LINK;
1284 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1285 perror("bind(netlink)");
1286 close(s);
1287 return -1;
1288 }
1289
1290 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
7af376e4 1291 drv->ctx);
bbaf0837
JM		 1292 drv->link_event_sock = s;
1293
1294 return 0;
1295#endif /* HOSTAPD */
1296}
1297
1298
9fff9fdc
JM		 1299/**
1300 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1301 * @ctx: context to be used when calling wpa_supplicant functions,
1302 * e.g., wpa_supplicant_event()
1303 * @ifname: interface name, e.g., wlan0
1304 * Returns: Pointer to private data, %NULL on failure
1305 */
1306static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1307{
9fff9fdc
JM		 1308 struct wpa_driver_nl80211_data *drv;
1309
1310 drv = os_zalloc(sizeof(*drv));
1311 if (drv == NULL)
1312 return NULL;
1313 drv->ctx = ctx;
1314 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
9fff9fdc
JM		 1315 drv->monitor_ifidx = -1;
1316 drv->monitor_sock = -1;
bbaf0837
JM		 1317 drv->link_event_sock = -1;
1318 drv->ioctl_sock = -1;
9fff9fdc 1319
bbaf0837
JM		 1320 if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1321 os_free(drv);
1322 return NULL;
1323 }
9fff9fdc 1324
3f5285e8
JM		 1325 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1326 if (drv->ioctl_sock < 0) {
1327 perror("socket(PF_INET,SOCK_DGRAM)");
bbaf0837 1328 goto failed;
3f5285e8
JM		 1329 }
1330
bbaf0837
JM		 1331 if (wpa_driver_nl80211_init_link_events(drv) ||
1332 wpa_driver_nl80211_finish_drv_init(drv))
1333 goto failed;
7524cfb1
JM		 1334
1335 return drv;
1336
bbaf0837
JM		 1337failed:
1338 if (drv->link_event_sock >= 0) {
1339 eloop_unregister_read_sock(drv->link_event_sock);
1340 close(drv->link_event_sock);
1341 }
1342 if (drv->ioctl_sock >= 0)
1343 close(drv->ioctl_sock);
1344
7524cfb1 1345 genl_family_put(drv->nl80211);
7524cfb1 1346 nl_cache_free(drv->nl_cache);
7524cfb1 1347 nl_handle_destroy(drv->nl_handle);
7524cfb1 1348 nl_cb_put(drv->nl_cb);
bbaf0837 1349
7524cfb1
JM		 1350 os_free(drv);
1351 return NULL;
1352}
1353
1354
362f781e 1355static int
7524cfb1
JM		 1356wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1357{
a87c9d96
JM		 1358 drv->ifindex = if_nametoindex(drv->ifname);
1359
bbaf0837 1360#ifndef HOSTAPD
ad1e68e6 1361 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
a87c9d96
JM		 1362 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1363 "use managed mode");
1364 }
1365
2135f224
JM		 1366 if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1367 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1368 "UP", drv->ifname);
362f781e
JM		 1369 return -1;
1370 }
3f5285e8 1371
93d11400
ZY		 1372 if (wpa_driver_nl80211_capa(drv))
1373 return -1;
80bc75f1 1374
3f5285e8 1375 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
bbaf0837 1376#endif /* HOSTAPD */
362f781e
JM		 1377
1378 return 0;
3f5285e8
JM		 1379}
1380
1381
bbaf0837
JM		 1382#ifdef HOSTAPD
1383static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1384{
1385 struct i802_bss *bss, *prev;
1386 bss = drv->bss.next;
1387 while (bss) {
1388 prev = bss;
1389 bss = bss->next;
1390 os_free(bss);
1391 }
1392}
1393#endif /* HOSTAPD */
1394
1395
8a27af5c
JM		 1396#if defined(CONFIG_AP) || defined(HOSTAPD)
1397static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1398{
1399 struct nl_msg *msg;
1400
1401 msg = nlmsg_alloc();
1402 if (!msg)
1403 return -ENOMEM;
1404
1405 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1406 0, NL80211_CMD_DEL_BEACON, 0);
1407 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1408
1409 return send_and_recv_msgs(drv, msg, NULL, NULL);
1410 nla_put_failure:
1411 return -ENOBUFS;
1412}
1413#endif /* CONFIG_AP || HOSTAPD */
1414
1415
3f5285e8 1416/**
7e5ba1b9
JM		 1417 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1418 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
3f5285e8
JM		 1419 *
1420 * Shut down driver interface and processing of driver events. Free
1421 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1422 */
7e5ba1b9 1423static void wpa_driver_nl80211_deinit(void *priv)
3f5285e8
JM		 1424{
1425 struct wpa_driver_nl80211_data *drv = priv;
3f5285e8 1426
bbaf0837 1427#if defined(CONFIG_AP) || defined(HOSTAPD)
460456f8 1428 nl80211_remove_monitor_interface(drv);
0915d02c
JM		 1429 if (drv->monitor_sock >= 0) {
1430 eloop_unregister_read_sock(drv->monitor_sock);
1431 close(drv->monitor_sock);
1432 }
8a27af5c
JM		 1433
1434 if (drv->nlmode == NL80211_IFTYPE_AP)
1435 wpa_driver_nl80211_del_beacon(drv);
bbaf0837 1436#endif /* CONFIG_AP || HOSTAPD */
0915d02c 1437
bbaf0837
JM		 1438#ifdef HOSTAPD
1439 if (drv->last_freq_ht) {
1440 /* Clear HT flags from the driver */
1441 struct hostapd_freq_params freq;
1442 os_memset(&freq, 0, sizeof(freq));
1443 freq.freq = drv->last_freq;
1444 i802_set_freq(priv, &freq);
1445 }
1446
bbaf0837
JM		 1447 if (drv->eapol_sock >= 0) {
1448 eloop_unregister_read_sock(drv->eapol_sock);
1449 close(drv->eapol_sock);
1450 }
1451
1452 if (drv->if_indices != drv->default_if_indices)
1453 os_free(drv->if_indices);
1454
1455 wpa_driver_nl80211_free_bss(drv);
1456#else /* HOSTAPD */
3f5285e8
JM		 1457
1458 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1459
bbaf0837
JM		 1460 if (drv->link_event_sock >= 0) {
1461 eloop_unregister_read_sock(drv->link_event_sock);
1462 close(drv->link_event_sock);
1463 }
1464#endif /* HOSTAPD */
3f5285e8 1465
bbaf0837
JM		 1466 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1467
1468 (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
ad1e68e6 1469 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
3f5285e8 1470
bbaf0837
JM		 1471 if (drv->ioctl_sock >= 0)
1472 close(drv->ioctl_sock);
3f5285e8 1473
335ce76b 1474 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
3f5285e8
JM		 1475 genl_family_put(drv->nl80211);
1476 nl_cache_free(drv->nl_cache);
335ce76b 1477 nl_cache_free(drv->nl_cache_event);
3f5285e8 1478 nl_handle_destroy(drv->nl_handle);
335ce76b 1479 nl_handle_destroy(drv->nl_handle_event);
3f5285e8
JM		 1480 nl_cb_put(drv->nl_cb);
1481
1482 os_free(drv);
1483}
1484
1485
1486/**
1487 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
ad1e68e6 1488 * @eloop_ctx: Driver private data
3f5285e8
JM		 1489 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1490 *
1491 * This function can be used as registered timeout when starting a scan to
1492 * generate a scan completed event if the driver does not report this.
1493 */
1494static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1495{
ad1e68e6
JM		 1496 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1497 if (drv->ap_scan_as_station) {
1498 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1499 drv->ap_scan_as_station = 0;
1500 }
3f5285e8
JM		 1501 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1502 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1503}
1504
1505
1506/**
1507 * wpa_driver_nl80211_scan - Request the driver to initiate scan
ad1e68e6 1508 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
6a1063e0 1509 * @params: Scan parameters
3f5285e8
JM		 1510 * Returns: 0 on success, -1 on failure
1511 */
6a1063e0
JM		 1512static int wpa_driver_nl80211_scan(void *priv,
1513 struct wpa_driver_scan_params *params)
3f5285e8
JM		 1514{
1515 struct wpa_driver_nl80211_data *drv = priv;
3f5285e8 1516 int ret = 0, timeout;
d3a98225 1517 struct nl_msg *msg, *ssids, *freqs;
6a1063e0 1518 size_t i;
3f5285e8 1519
0e75527f
JM		 1520 msg = nlmsg_alloc();
1521 ssids = nlmsg_alloc();
d3a98225
JM		 1522 freqs = nlmsg_alloc();
1523 if (!msg || !ssids || !freqs) {
0e75527f
JM		 1524 nlmsg_free(msg);
1525 nlmsg_free(ssids);
d3a98225 1526 nlmsg_free(freqs);
3f5285e8
JM		 1527 return -1;
1528 }
1529
0e75527f
JM		 1530 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1531 NL80211_CMD_TRIGGER_SCAN, 0);
1532
1533 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3f5285e8 1534
6a1063e0
JM		 1535 for (i = 0; i < params->num_ssids; i++) {
1536 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1537 params->ssids[i].ssid);
3f5285e8 1538 }
6a1063e0
JM		 1539 if (params->num_ssids)
1540 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
3f5285e8 1541
d173df52
JM		 1542 if (params->extra_ies) {
1543 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1544 params->extra_ies);
1545 }
1546
d3a98225
JM		 1547 if (params->freqs) {
1548 for (i = 0; params->freqs[i]; i++)
1549 NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1550 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1551 }
1552
0e75527f
JM		 1553 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1554 msg = NULL;
1555 if (ret) {
1556 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1557 "(%s)", ret, strerror(-ret));
ad1e68e6
JM		 1558#ifdef HOSTAPD
1559 if (drv->nlmode == NL80211_IFTYPE_AP) {
1560 /*
1561 * mac80211 does not allow scan requests in AP mode, so
1562 * try to do this in station mode.
1563 */
1564 if (wpa_driver_nl80211_set_mode(drv,
1565 IEEE80211_MODE_INFRA))
1566 goto nla_put_failure;
1567
1568 if (wpa_driver_nl80211_scan(drv, params)) {
1569 wpa_driver_nl80211_set_mode(drv,
1570 IEEE80211_MODE_AP);
1571 goto nla_put_failure;
1572 }
1573
1574 /* Restore AP mode when processing scan results */
1575 drv->ap_scan_as_station = 1;
1576 ret = 0;
1577 } else
1578 goto nla_put_failure;
1579#else /* HOSTAPD */
0e75527f 1580 goto nla_put_failure;
ad1e68e6 1581#endif /* HOSTAPD */
3f5285e8
JM		 1582 }
1583
1584 /* Not all drivers generate "scan completed" wireless event, so try to
1585 * read results after a timeout. */
0e75527f 1586 timeout = 10;
3f5285e8
JM		 1587 if (drv->scan_complete_events) {
1588 /*
d173df52
JM		 1589 * The driver seems to deliver events to notify when scan is
1590 * complete, so use longer timeout to avoid race conditions
1591 * with scanning and following association request.
3f5285e8
JM		 1592 */
1593 timeout = 30;
1594 }
1595 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1596 "seconds", ret, timeout);
1597 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
0e75527f
JM		 1598 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1599 drv, drv->ctx);
3f5285e8 1600
0e75527f
JM		 1601nla_put_failure:
1602 nlmsg_free(ssids);
1603 nlmsg_free(msg);
d3a98225 1604 nlmsg_free(freqs);
3f5285e8
JM		 1605 return ret;
1606}
1607
1608
b3db1e1c 1609static int bss_info_handler(struct nl_msg *msg, void *arg)
3f5285e8 1610{
b3db1e1c
JM		 1611 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1612 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1613 struct nlattr *bss[NL80211_BSS_MAX + 1];
1614 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1615 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1616 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1617 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1618 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1619 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1620 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1621 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1622 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
b3ad11bb 1623 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
b3db1e1c
JM		 1624 };
1625 struct wpa_scan_results *res = arg;
3f5285e8
JM		 1626 struct wpa_scan_res **tmp;
1627 struct wpa_scan_res *r;
b3db1e1c
JM		 1628 const u8 *ie;
1629 size_t ie_len;
3f5285e8 1630
b3db1e1c
JM		 1631 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1632 genlmsg_attrlen(gnlh, 0), NULL);
1633 if (!tb[NL80211_ATTR_BSS])
1634 return NL_SKIP;
1635 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1636 bss_policy))
1637 return NL_SKIP;
1638 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1639 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1640 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1641 } else {
1642 ie = NULL;
1643 ie_len = 0;
1644 }
3f5285e8 1645
b3db1e1c 1646 r = os_zalloc(sizeof(*r) + ie_len);
3f5285e8 1647 if (r == NULL)
b3db1e1c
JM		 1648 return NL_SKIP;
1649 if (bss[NL80211_BSS_BSSID])
1650 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1651 ETH_ALEN);
1652 if (bss[NL80211_BSS_FREQUENCY])
1653 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1654 if (bss[NL80211_BSS_BEACON_INTERVAL])
1655 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1656 if (bss[NL80211_BSS_CAPABILITY])
1657 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
7c2849d2
JM		 1658 r->flags |= WPA_SCAN_NOISE_INVALID;
1659 if (bss[NL80211_BSS_SIGNAL_MBM]) {
b3db1e1c 1660 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
7c2849d2
JM		 1661 r->level /= 100; /* mBm to dBm */
1662 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1663 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1664 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1665 r->flags |= WPA_SCAN_LEVEL_INVALID;
1666 } else
1667 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
b3db1e1c
JM		 1668 if (bss[NL80211_BSS_TSF])
1669 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
b3ad11bb
JM		 1670 if (bss[NL80211_BSS_SEEN_MS_AGO])
1671 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
b3db1e1c
JM		 1672 r->ie_len = ie_len;
1673 if (ie)
1674 os_memcpy(r + 1, ie, ie_len);
3f5285e8
JM		 1675
1676 tmp = os_realloc(res->res,
1677 (res->num + 1) * sizeof(struct wpa_scan_res *));
1678 if (tmp == NULL) {
1679 os_free(r);
b3db1e1c 1680 return NL_SKIP;
3f5285e8
JM		 1681 }
1682 tmp[res->num++] = r;
1683 res->res = tmp;
b3db1e1c
JM		 1684
1685 return NL_SKIP;
3f5285e8 1686}
b3db1e1c 1687
3f5285e8
JM		 1688
1689/**
1690 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1691 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1692 * Returns: Scan results on success, -1 on failure
1693 */
7e5ba1b9
JM		 1694static struct wpa_scan_results *
1695wpa_driver_nl80211_get_scan_results(void *priv)
3f5285e8
JM		 1696{
1697 struct wpa_driver_nl80211_data *drv = priv;
b3db1e1c 1698 struct nl_msg *msg;
3f5285e8 1699 struct wpa_scan_results *res;
b3db1e1c 1700 int ret;
3f5285e8
JM		 1701
1702 res = os_zalloc(sizeof(*res));
b3db1e1c 1703 if (res == NULL)
8e2c104f 1704 return NULL;
b3db1e1c
JM		 1705 msg = nlmsg_alloc();
1706 if (!msg)
1707 goto nla_put_failure;
3f5285e8 1708
b3db1e1c
JM		 1709 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1710 NL80211_CMD_GET_SCAN, 0);
1711 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3f5285e8 1712
b3db1e1c
JM		 1713 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1714 msg = NULL;
1715 if (ret == 0) {
1716 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1717 (unsigned long) res->num);
1718 return res;
3f5285e8 1719 }
b3db1e1c
JM		 1720 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1721 "(%s)", ret, strerror(-ret));
1722nla_put_failure:
1723 nlmsg_free(msg);
1724 wpa_scan_results_free(res);
1725 return NULL;
3f5285e8
JM		 1726}
1727
1728
642187d6
JM		 1729static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1730 wpa_alg alg, const u8 *addr, int key_idx,
1731 int set_tx,
1732 const u8 *seq, size_t seq_len,
1733 const u8 *key, size_t key_len)
3f5285e8 1734{
642187d6
JM		 1735 struct wpa_driver_nl80211_data *drv = priv;
1736 int ifindex = if_nametoindex(ifname);
3f5285e8 1737 struct nl_msg *msg;
1ad1cdc2 1738 int ret;
3f5285e8 1739
1ad1cdc2
JM		 1740 wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1741 "set_tx=%d seq_len=%lu key_len=%lu",
1742 __func__, ifindex, alg, addr, key_idx, set_tx,
3f5285e8
JM		 1743 (unsigned long) seq_len, (unsigned long) key_len);
1744
1745 msg = nlmsg_alloc();
1ad1cdc2
JM		 1746 if (!msg)
1747 return -ENOMEM;
3f5285e8
JM		 1748
1749 if (alg == WPA_ALG_NONE) {
1ad1cdc2
JM		 1750 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1751 0, NL80211_CMD_DEL_KEY, 0);
3f5285e8 1752 } else {
1ad1cdc2
JM		 1753 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1754 0, NL80211_CMD_NEW_KEY, 0);
3f5285e8 1755 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
d723bab4
JM		 1756 switch (alg) {
1757 case WPA_ALG_WEP:
1758 if (key_len == 5)
1759 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1760 WLAN_CIPHER_SUITE_WEP40);
1761 else
1762 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1763 WLAN_CIPHER_SUITE_WEP104);
1764 break;
1765 case WPA_ALG_TKIP:
1766 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1767 WLAN_CIPHER_SUITE_TKIP);
1768 break;
1769 case WPA_ALG_CCMP:
1770 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1771 WLAN_CIPHER_SUITE_CCMP);
1772 break;
1773 case WPA_ALG_IGTK:
1774 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1775 WLAN_CIPHER_SUITE_AES_CMAC);
1776 break;
1777 default:
1778 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1779 "algorithm %d", __func__, alg);
3f5285e8
JM		 1780 nlmsg_free(msg);
1781 return -1;
1782 }
1783 }
1784
849ef835 1785 if (seq && seq_len)
1ad1cdc2
JM		 1786 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1787
3f5285e8
JM		 1788 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1789 {
1790 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1791 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1792 }
1793 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1ad1cdc2 1794 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3f5285e8 1795
1ad1cdc2
JM		 1796 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1797 if (ret == -ENOENT && alg == WPA_ALG_NONE)
1798 ret = 0;
1799 if (ret)
1800 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1801 ret, strerror(-ret));
3f5285e8 1802
1ad1cdc2
JM		 1803 /*
1804 * If we failed or don't need to set the default TX key (below),
1805 * we're done here.
1806 */
1807 if (ret || !set_tx || alg == WPA_ALG_NONE)
1808 return ret;
1809#ifdef HOSTAPD /* FIX: is this needed? */
1810 if (addr)
1811 return ret;
1812#endif /* HOSTAPD */
3f5285e8 1813
1ad1cdc2
JM		 1814 msg = nlmsg_alloc();
1815 if (!msg)
1816 return -ENOMEM;
3f5285e8 1817
1ad1cdc2
JM		 1818 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1819 0, NL80211_CMD_SET_KEY, 0);
1820 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1821 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1822 if (alg == WPA_ALG_IGTK)
1823 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1824 else
1825 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
3f5285e8 1826
1ad1cdc2
JM		 1827 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1828 if (ret == -ENOENT)
1829 ret = 0;
1830 if (ret)
1831 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1832 "err=%d %s)", ret, strerror(-ret));
1833 return ret;
3f5285e8
JM		 1834
1835nla_put_failure:
6241fcb1 1836 return -ENOBUFS;
3f5285e8
JM		 1837}
1838
1839
0194fedb
JB		 1840static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1841 int key_idx, int defkey,
1842 const u8 *seq, size_t seq_len,
1843 const u8 *key, size_t key_len)
1844{
1845 struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1846 if (!key_attr)
1847 return -1;
1848
1849 if (defkey && alg == WPA_ALG_IGTK)
1850 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1851 else if (defkey)
1852 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1853
1854 NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1855
d723bab4
JM		 1856 switch (alg) {
1857 case WPA_ALG_WEP:
1858 if (key_len == 5)
2aa5f847
JM		 1859 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1860 WLAN_CIPHER_SUITE_WEP40);
d723bab4 1861 else
2aa5f847
JM		 1862 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1863 WLAN_CIPHER_SUITE_WEP104);
d723bab4
JM		 1864 break;
1865 case WPA_ALG_TKIP:
2aa5f847 1866 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
d723bab4
JM		 1867 break;
1868 case WPA_ALG_CCMP:
2aa5f847 1869 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
d723bab4
JM		 1870 break;
1871 case WPA_ALG_IGTK:
2aa5f847
JM		 1872 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1873 WLAN_CIPHER_SUITE_AES_CMAC);
d723bab4
JM		 1874 break;
1875 default:
1876 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1877 "algorithm %d", __func__, alg);
0194fedb 1878 return -1;
d723bab4 1879 }
0194fedb
JB		 1880
1881 if (seq && seq_len)
1882 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1883
1884 NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1885
1886 nla_nest_end(msg, key_attr);
1887
1888 return 0;
1889 nla_put_failure:
1890 return -1;
1891}
1892
c811d5bc 1893
cfaab580
ZY		 1894static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1895 struct nl_msg *msg)
1896{
1897 int i, privacy = 0;
1898 struct nlattr *nl_keys, *nl_key;
1899
1900 for (i = 0; i < 4; i++) {
1901 if (!params->wep_key[i])
1902 continue;
1903 privacy = 1;
1904 break;
1905 }
1906 if (!privacy)
1907 return 0;
1908
1909 NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1910
1911 nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1912 if (!nl_keys)
1913 goto nla_put_failure;
1914
1915 for (i = 0; i < 4; i++) {
1916 if (!params->wep_key[i])
1917 continue;
1918
1919 nl_key = nla_nest_start(msg, i);
1920 if (!nl_key)
1921 goto nla_put_failure;
1922
1923 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1924 params->wep_key[i]);
1925 if (params->wep_key_len[i] == 5)
1926 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1927 WLAN_CIPHER_SUITE_WEP40);
1928 else
1929 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1930 WLAN_CIPHER_SUITE_WEP104);
1931
1932 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1933
1934 if (i == params->wep_tx_keyidx)
1935 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1936
1937 nla_nest_end(msg, nl_key);
1938 }
1939 nla_nest_end(msg, nl_keys);
1940
1941 return 0;
1942
1943nla_put_failure:
1944 return -ENOBUFS;
1945}
1946
1947
c2a04078
JM		 1948static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1949 const u8 *addr, int cmd, u16 reason_code)
1950{
1951 int ret = -1;
1952 struct nl_msg *msg;
1953
1954 msg = nlmsg_alloc();
1955 if (!msg)
1956 return -1;
1957
1958 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1959
1960 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1961 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1962 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1963
1964 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1965 msg = NULL;
1966 if (ret) {
1967 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1968 "(%s)", ret, strerror(-ret));
1969 goto nla_put_failure;
1970 }
1971 ret = 0;
1972
1973nla_put_failure:
1974 nlmsg_free(msg);
1975 return ret;
1976}
3f5285e8
JM		 1977
1978
cfaab580
ZY		 1979static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1980 const u8 *addr, int reason_code)
1981{
1982 wpa_printf(MSG_DEBUG, "%s", __func__);
1983 drv->associated = 0;
1984 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1985 reason_code);
1986}
1987
1988
3f5285e8 1989static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
c2a04078 1990 int reason_code)
3f5285e8
JM		 1991{
1992 struct wpa_driver_nl80211_data *drv = priv;
cfaab580
ZY		 1993 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1994 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
c2a04078 1995 wpa_printf(MSG_DEBUG, "%s", __func__);
13405f35 1996 drv->associated = 0;
c2a04078
JM		 1997 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1998 reason_code);
3f5285e8
JM		 1999}
2000
2001
2002static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
c2a04078 2003 int reason_code)
3f5285e8
JM		 2004{
2005 struct wpa_driver_nl80211_data *drv = priv;
cfaab580
ZY		 2006 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2007 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
c2a04078 2008 wpa_printf(MSG_DEBUG, "%s", __func__);
13405f35 2009 drv->associated = 0;
c2a04078
JM		 2010 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2011 reason_code);
3f5285e8
JM		 2012}
2013
2014
c2a04078
JM		 2015static int wpa_driver_nl80211_authenticate(
2016 void *priv, struct wpa_driver_auth_params *params)
2017{
2018 struct wpa_driver_nl80211_data *drv = priv;
a0b2f99b 2019 int ret = -1, i;
c2a04078
JM		 2020 struct nl_msg *msg;
2021 enum nl80211_auth_type type;
6d6f4bb8 2022 int count = 0;
c2a04078
JM		 2023
2024 drv->associated = 0;
2025
4a867032
JM		 2026 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
2027 return -1;
2028
6d6f4bb8 2029retry:
c2a04078
JM		 2030 msg = nlmsg_alloc();
2031 if (!msg)
2032 return -1;
2033
2034 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2035 drv->ifindex);
a0b2f99b 2036
0194fedb
JB		 2037 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2038 NL80211_CMD_AUTHENTICATE, 0);
2039
a0b2f99b
JM		 2040 for (i = 0; i < 4; i++) {
2041 if (!params->wep_key[i])
2042 continue;
642187d6
JM		 2043 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2044 i,
a0b2f99b
JM		 2045 i == params->wep_tx_keyidx, NULL, 0,
2046 params->wep_key[i],
2047 params->wep_key_len[i]);
0194fedb
JB		 2048 if (params->wep_tx_keyidx != i)
2049 continue;
2050 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2051 params->wep_key[i], params->wep_key_len[i])) {
2052 nlmsg_free(msg);
2053 return -1;
2054 }
a0b2f99b
JM		 2055 }
2056
c2a04078
JM		 2057 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2058 if (params->bssid) {
2059 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2060 MAC2STR(params->bssid));
2061 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2062 }
2063 if (params->freq) {
2064 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2065 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2066 }
2067 if (params->ssid) {
2068 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2069 params->ssid, params->ssid_len);
2070 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2071 params->ssid);
2072 }
2073 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
2074 if (params->ie)
2075 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2076 /*
2077 * TODO: if multiple auth_alg options enabled, try them one by one if
2078 * the AP rejects authentication due to unknown auth alg
2079 */
2080 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2081 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2082 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2083 type = NL80211_AUTHTYPE_SHARED_KEY;
2084 else if (params->auth_alg & AUTH_ALG_LEAP)
2085 type = NL80211_AUTHTYPE_NETWORK_EAP;
2086 else if (params->auth_alg & AUTH_ALG_FT)
2087 type = NL80211_AUTHTYPE_FT;
2088 else
2089 goto nla_put_failure;
2090 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
2091 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2092
2093 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2094 msg = NULL;
2095 if (ret) {
2096 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2097 "(%s)", ret, strerror(-ret));
6d6f4bb8
JM		 2098 count++;
2099 if (ret == -EALREADY && count == 1 && params->bssid) {
2100 /*
2101 * mac80211 does not currently accept new
2102 * authentication if we are already authenticated. As a
2103 * workaround, force deauthentication and try again.
2104 */
2105 wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2106 "after forced deauthentication");
2107 wpa_driver_nl80211_deauthenticate(
2108 drv, params->bssid,
2109 WLAN_REASON_PREV_AUTH_NOT_VALID);
2110 nlmsg_free(msg);
2111 goto retry;
2112 }
c2a04078
JM		 2113 goto nla_put_failure;
2114 }
2115 ret = 0;
2116 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2117 "successfully");
2118
2119nla_put_failure:
2120 nlmsg_free(msg);
2121 return ret;
2122}
2123
2124
c3965310 2125#if defined(CONFIG_AP) || defined(HOSTAPD)
282d5590
JM		 2126
2127struct phy_info_arg {
2128 u16 *num_modes;
2129 struct hostapd_hw_modes *modes;
2130};
2131
2132static int phy_info_handler(struct nl_msg *msg, void *arg)
2133{
2134 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2135 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2136 struct phy_info_arg *phy_info = arg;
2137
2138 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2139
2140 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2141 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2142 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2143 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2144 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2145 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2146 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2147 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2148 };
2149
2150 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2151 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2152 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2153 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2154 };
2155
2156 struct nlattr *nl_band;
2157 struct nlattr *nl_freq;
2158 struct nlattr *nl_rate;
2159 int rem_band, rem_freq, rem_rate;
2160 struct hostapd_hw_modes *mode;
2161 int idx, mode_is_set;
2162
2163 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2164 genlmsg_attrlen(gnlh, 0), NULL);
2165
2166 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2167 return NL_SKIP;
2168
2169 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2170 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2171 if (!mode)
2172 return NL_SKIP;
2173 phy_info->modes = mode;
2174
2175 mode_is_set = 0;
2176
2177 mode = &phy_info->modes[*(phy_info->num_modes)];
2178 memset(mode, 0, sizeof(*mode));
2179 *(phy_info->num_modes) += 1;
2180
2181 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2182 nla_len(nl_band), NULL);
2183
2184 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2185 mode->ht_capab = nla_get_u16(
2186 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2187 }
2188
be8eb8ab
JM		 2189 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2190 mode->a_mpdu_params |= nla_get_u8(
2191 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2192 0x03;
2193 }
2194
2195 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2196 mode->a_mpdu_params |= nla_get_u8(
2197 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2198 2;
2199 }
2200
08eb154d
JM		 2201 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2202 nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2203 u8 *mcs;
2204 mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2205 os_memcpy(mode->mcs_set, mcs, 16);
2206 }
2207
282d5590
JM		 2208 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2209 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2210 nla_len(nl_freq), freq_policy);
2211 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2212 continue;
2213 mode->num_channels++;
2214 }
2215
2216 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2217 if (!mode->channels)
2218 return NL_SKIP;
2219
2220 idx = 0;
2221
2222 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2223 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2224 nla_len(nl_freq), freq_policy);
2225 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2226 continue;
2227
2228 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2229 mode->channels[idx].flag = 0;
2230
2231 if (!mode_is_set) {
2232 /* crude heuristic */
2233 if (mode->channels[idx].freq < 4000)
2234 mode->mode = HOSTAPD_MODE_IEEE80211B;
2235 else
2236 mode->mode = HOSTAPD_MODE_IEEE80211A;
2237 mode_is_set = 1;
2238 }
2239
2240 /* crude heuristic */
2241 if (mode->channels[idx].freq < 4000)
5a0ffb5f 2242 if (mode->channels[idx].freq == 2484)
282d5590
JM		 2243 mode->channels[idx].chan = 14;
2244 else
2245 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2246 else
2247 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2248
2249 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2250 mode->channels[idx].flag |=
2251 HOSTAPD_CHAN_DISABLED;
2252 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2253 mode->channels[idx].flag |=
2254 HOSTAPD_CHAN_PASSIVE_SCAN;
2255 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2256 mode->channels[idx].flag |=
2257 HOSTAPD_CHAN_NO_IBSS;
2258 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2259 mode->channels[idx].flag |=
2260 HOSTAPD_CHAN_RADAR;
2261
2262 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2263 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2264 mode->channels[idx].max_tx_power =
2265 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2266
2267 idx++;
2268 }
2269
2270 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2271 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2272 nla_len(nl_rate), rate_policy);
2273 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2274 continue;
2275 mode->num_rates++;
2276 }
2277
2278 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2279 if (!mode->rates)
2280 return NL_SKIP;
2281
2282 idx = 0;
2283
2284 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2285 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2286 nla_len(nl_rate), rate_policy);
2287 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2288 continue;
2289 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2290
2291 /* crude heuristic */
2292 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2293 mode->rates[idx].rate > 200)
2294 mode->mode = HOSTAPD_MODE_IEEE80211G;
2295
2296 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2297 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2298
2299 idx++;
2300 }
2301 }
2302
2303 return NL_SKIP;
2304}
2305
2306static struct hostapd_hw_modes *
2307wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2308{
2309 u16 m;
2310 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2311 int i, mode11g_idx = -1;
2312
2313 /* If only 802.11g mode is included, use it to construct matching
2314 * 802.11b mode data. */
2315
2316 for (m = 0; m < *num_modes; m++) {
2317 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2318 return modes; /* 802.11b already included */
2319 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2320 mode11g_idx = m;
2321 }
2322
2323 if (mode11g_idx < 0)
2324 return modes; /* 2.4 GHz band not supported at all */
2325
2326 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2327 if (nmodes == NULL)
2328 return modes; /* Could not add 802.11b mode */
2329
2330 mode = &nmodes[*num_modes];
2331 os_memset(mode, 0, sizeof(*mode));
2332 (*num_modes)++;
2333 modes = nmodes;
2334
2335 mode->mode = HOSTAPD_MODE_IEEE80211B;
2336
2337 mode11g = &modes[mode11g_idx];
2338 mode->num_channels = mode11g->num_channels;
2339 mode->channels = os_malloc(mode11g->num_channels *
2340 sizeof(struct hostapd_channel_data));
2341 if (mode->channels == NULL) {
2342 (*num_modes)--;
2343 return modes; /* Could not add 802.11b mode */
2344 }
2345 os_memcpy(mode->channels, mode11g->channels,
2346 mode11g->num_channels * sizeof(struct hostapd_channel_data));
2347
2348 mode->num_rates = 0;
2349 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2350 if (mode->rates == NULL) {
2351 os_free(mode->channels);
2352 (*num_modes)--;
2353 return modes; /* Could not add 802.11b mode */
2354 }
2355
2356 for (i = 0; i < mode11g->num_rates; i++) {
2357 if (mode11g->rates[i].rate > 110 ||
2358 mode11g->rates[i].flags &
2359 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2360 continue;
2361 mode->rates[mode->num_rates] = mode11g->rates[i];
2362 mode->num_rates++;
2363 if (mode->num_rates == 4)
2364 break;
2365 }
2366
2367 if (mode->num_rates == 0) {
2368 os_free(mode->channels);
2369 os_free(mode->rates);
2370 (*num_modes)--;
2371 return modes; /* No 802.11b rates */
2372 }
2373
2374 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2375 "information");
2376
2377 return modes;
2378}
2379
2380
2381static struct hostapd_hw_modes *
2382wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2383{
2384 struct wpa_driver_nl80211_data *drv = priv;
2385 struct nl_msg *msg;
2386 struct phy_info_arg result = {
2387 .num_modes = num_modes,
2388 .modes = NULL,
2389 };
2390
2391 *num_modes = 0;
2392 *flags = 0;
2393
2394 msg = nlmsg_alloc();
2395 if (!msg)
2396 return NULL;
2397
2398 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2399 0, NL80211_CMD_GET_WIPHY, 0);
2400
2401 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2402
2403 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2404 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2405 nla_put_failure:
2406 return NULL;
2407}
2408
2409
2c2010ac
JM		 2410static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2411 const void *data, size_t len,
2412 int encrypt)
2413{
2414 __u8 rtap_hdr[] = {
2415 0x00, 0x00, /* radiotap version */
2416 0x0e, 0x00, /* radiotap length */
2417 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2418 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2419 0x00, /* padding */
2420 0x00, 0x00, /* RX and TX flags to indicate that */
2421 0x00, 0x00, /* this is the injected frame directly */
2422 };
2423 struct iovec iov[2] = {
2424 {
2425 .iov_base = &rtap_hdr,
2426 .iov_len = sizeof(rtap_hdr),
2427 },
2428 {
2429 .iov_base = (void *) data,
2430 .iov_len = len,
2431 }
2432 };
2433 struct msghdr msg = {
2434 .msg_name = NULL,
2435 .msg_namelen = 0,
2436 .msg_iov = iov,
2437 .msg_iovlen = 2,
2438 .msg_control = NULL,
2439 .msg_controllen = 0,
2440 .msg_flags = 0,
2441 };
2442
2443 if (encrypt)
2444 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2445
2446 return sendmsg(drv->monitor_sock, &msg, 0);
2447}
2448
2449
2450static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2451 size_t data_len)
2452{
2453 struct wpa_driver_nl80211_data *drv = priv;
2454 struct ieee80211_mgmt *mgmt;
7a47d567 2455 int encrypt = 1;
2c2010ac
JM		 2456 u16 fc;
2457
2458 mgmt = (struct ieee80211_mgmt *) data;
2459 fc = le_to_host16(mgmt->frame_control);
2460
2461 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2462 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2463 /*
2464 * Only one of the authentication frame types is encrypted.
2465 * In order for static WEP encryption to work properly (i.e.,
2466 * to not encrypt the frame), we need to tell mac80211 about
2467 * the frames that must not be encrypted.
2468 */
2469 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2470 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
7a47d567
JB		 2471 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2472 encrypt = 0;
2c2010ac
JM		 2473 }
2474
7a47d567 2475 return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2c2010ac
JM		 2476}
2477
5d674872
JM		 2478#endif /* CONFIG_AP || HOSTAPD */
2479
2c2010ac 2480
5d674872
JM		 2481static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2482 const u8 *head, size_t head_len,
2483 const u8 *tail, size_t tail_len,
2484 int dtim_period, int beacon_int)
d2440ba0
JM		 2485{
2486 struct wpa_driver_nl80211_data *drv = priv;
2487 struct nl_msg *msg;
2488 u8 cmd = NL80211_CMD_NEW_BEACON;
2489 int ret;
b4fd6fab 2490 int beacon_set;
5d674872 2491 int ifindex = if_nametoindex(ifname);
b4fd6fab
JM		 2492#ifdef HOSTAPD
2493 struct i802_bss *bss;
2494
2495 bss = get_bss(drv, ifindex);
2496 if (bss == NULL)
2497 return -ENOENT;
2498 beacon_set = bss->beacon_set;
2499#else /* HOSTAPD */
2500 beacon_set = drv->beacon_set;
2501#endif /* HOSTAPD */
d2440ba0
JM		 2502
2503 msg = nlmsg_alloc();
2504 if (!msg)
2505 return -ENOMEM;
2506
2507 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
b4fd6fab
JM		 2508 beacon_set);
2509 if (beacon_set)
d2440ba0
JM		 2510 cmd = NL80211_CMD_SET_BEACON;
2511
2512 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2513 0, cmd, 0);
2514 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2515 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
b4fd6fab 2516 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5d674872 2517 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
d2440ba0
JM		 2518 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2519
2520 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2521 if (ret) {
2522 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2523 ret, strerror(-ret));
b4fd6fab
JM		 2524 } else {
2525#ifdef HOSTAPD
2526 bss->beacon_set = 1;
2527#else /* HOSTAPD */
d2440ba0 2528 drv->beacon_set = 1;
b4fd6fab
JM		 2529#endif /* HOSTAPD */
2530 }
d2440ba0
JM		 2531 return ret;
2532 nla_put_failure:
2533 return -ENOBUFS;
2534}
2535
2536
5d674872 2537#if defined(CONFIG_AP) || defined(HOSTAPD)
d2440ba0 2538
f019981a
JM		 2539static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2540 int freq, int ht_enabled,
2541 int sec_channel_offset)
1581b38b
JM		 2542{
2543 struct nl_msg *msg;
d2440ba0 2544 int ret;
1581b38b
JM		 2545
2546 msg = nlmsg_alloc();
2547 if (!msg)
2548 return -1;
2549
2550 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2551 NL80211_CMD_SET_WIPHY, 0);
2552
2553 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
f019981a
JM		 2554 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2555 if (ht_enabled) {
2556 switch (sec_channel_offset) {
2557 case -1:
2558 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2559 NL80211_CHAN_HT40MINUS);
2560 break;
2561 case 1:
2562 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2563 NL80211_CHAN_HT40PLUS);
2564 break;
2565 default:
2566 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2567 NL80211_CHAN_HT20);
2568 break;
2569 }
2570 }
1581b38b 2571
d2440ba0
JM		 2572 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2573 if (ret == 0)
1581b38b 2574 return 0;
f019981a
JM		 2575 wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2576 "%d (%s)", freq, ret, strerror(-ret));
1581b38b
JM		 2577nla_put_failure:
2578 return -1;
2579}
2580
0f4e8b4f
JM		 2581
2582static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2583 struct hostapd_sta_add_params *params)
2584{
2585 struct wpa_driver_nl80211_data *drv = priv;
2586 struct nl_msg *msg;
2587 int ret = -ENOBUFS;
2588
2589 msg = nlmsg_alloc();
2590 if (!msg)
2591 return -ENOMEM;
2592
2593 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2594 0, NL80211_CMD_NEW_STATION, 0);
2595
2596 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2597 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2598 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2599 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2600 params->supp_rates);
2601 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2602 params->listen_interval);
2603
2604#ifdef CONFIG_IEEE80211N
2605 if (params->ht_capabilities) {
2606 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2607 params->ht_capabilities->length,
2608 &params->ht_capabilities->data);
2609 }
2610#endif /* CONFIG_IEEE80211N */
2611
2612 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2613 if (ret)
2614 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2615 "result: %d (%s)", ret, strerror(-ret));
2616 if (ret == -EEXIST)
2617 ret = 0;
2618 nla_put_failure:
2619 return ret;
2620}
2621
2622
2623static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2624{
2625 struct wpa_driver_nl80211_data *drv = priv;
2626 struct nl_msg *msg;
2627 int ret;
2628
2629 msg = nlmsg_alloc();
2630 if (!msg)
2631 return -ENOMEM;
2632
2633 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2634 0, NL80211_CMD_DEL_STATION, 0);
2635
2636 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2637 if_nametoindex(drv->ifname));
2638 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2639
2640 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2641 if (ret == -ENOENT)
2642 return 0;
2643 return ret;
2644 nla_put_failure:
2645 return -ENOBUFS;
2646}
2647
1581b38b 2648
0915d02c
JM		 2649static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2650 int ifidx)
2651{
2652 struct nl_msg *msg;
2653
2135f224
JM		 2654#ifdef HOSTAPD
2655 /* stop listening for EAPOL on this interface */
2656 del_ifidx(drv, ifidx);
2657#endif /* HOSTAPD */
2658
0915d02c
JM		 2659 msg = nlmsg_alloc();
2660 if (!msg)
2661 goto nla_put_failure;
2662
2663 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2664 0, NL80211_CMD_DEL_INTERFACE, 0);
2665 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2666
2667 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2668 return;
2669 nla_put_failure:
2670 wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2671 ifidx);
2672}
2673
2674
a35187e7
KH		 2675static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2676 const char *ifname,
2677 enum nl80211_iftype iftype,
2678 const u8 *addr)
0915d02c
JM		 2679{
2680 struct nl_msg *msg, *flags = NULL;
2681 int ifidx;
2682 int ret = -ENOBUFS;
2683
2684 msg = nlmsg_alloc();
2685 if (!msg)
2686 return -1;
2687
2688 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2689 0, NL80211_CMD_NEW_INTERFACE, 0);
2690 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2691 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2692 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2693
2694 if (iftype == NL80211_IFTYPE_MONITOR) {
2695 int err;
2696
2697 flags = nlmsg_alloc();
2698 if (!flags)
2699 goto nla_put_failure;
2700
2701 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2702
2703 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2704
2705 nlmsg_free(flags);
2706
2707 if (err)
2708 goto nla_put_failure;
2709 }
2710
2711 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2712 if (ret) {
2713 nla_put_failure:
a35187e7
KH		 2714 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2715 ifname, ret, strerror(-ret));
0915d02c
JM		 2716 return ret;
2717 }
2718
2719 ifidx = if_nametoindex(ifname);
2720
2721 if (ifidx <= 0)
2722 return -1;
2723
2135f224
JM		 2724#ifdef HOSTAPD
2725 /* start listening for EAPOL on this interface */
2726 add_ifidx(drv, ifidx);
2727
41d931ee
JM		 2728 if (addr && iftype == NL80211_IFTYPE_AP &&
2729 set_ifhwaddr(drv, ifname, addr)) {
2730 nl80211_remove_iface(drv, ifidx);
2731 return -1;
2135f224
JM		 2732 }
2733#endif /* HOSTAPD */
2734
0915d02c
JM		 2735 return ifidx;
2736}
a35187e7
KH		 2737static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2738 const char *ifname, enum nl80211_iftype iftype,
2739 const u8 *addr)
2740{
2741 int ret;
2742
2743 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2744
2745 /* if error occured and interface exists already */
2746 if (ret == -ENFILE && if_nametoindex(ifname)) {
2747 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2748
2749 /* Try to remove the interface that was already there. */
2750 nl80211_remove_iface(drv, if_nametoindex(ifname));
2751
2752 /* Try to create the interface again */
2753 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2754 }
2755
2756 return ret;
2757}
0915d02c 2758
2135f224
JM		 2759#endif /* CONFIG_AP || HOSTAPD */
2760
2761#ifdef CONFIG_AP
0915d02c 2762
0915d02c
JM		 2763void ap_tx_status(void *ctx, const u8 *addr,
2764 const u8 *buf, size_t len, int ack);
3a57305f 2765void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
0915d02c
JM		 2766void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2767 struct hostapd_frame_info *fi);
2768void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2769
072ad14c
JM		 2770#endif /* CONFIG_AP */
2771
2772#if defined(CONFIG_AP) || defined(HOSTAPD)
0915d02c
JM		 2773
2774static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2775{
2776 struct ieee80211_hdr *hdr;
2777 u16 fc, type, stype;
2778
2779 hdr = (struct ieee80211_hdr *) buf;
2780 fc = le_to_host16(hdr->frame_control);
2781
2782 type = WLAN_FC_GET_TYPE(fc);
2783 stype = WLAN_FC_GET_STYPE(fc);
2784
2785 switch (type) {
2786 case WLAN_FC_TYPE_MGMT:
2787 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2788 ok ? "ACK" : "fail");
072ad14c
JM		 2789#ifdef HOSTAPD
2790 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2791#else /* HOSTAPD */
0915d02c 2792 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
072ad14c 2793#endif /* HOSTAPD */
0915d02c
JM		 2794 break;
2795 case WLAN_FC_TYPE_CTRL:
2796 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2797 ok ? "ACK" : "fail");
2798 break;
2799 case WLAN_FC_TYPE_DATA:
072ad14c
JM		 2800#ifdef HOSTAPD
2801 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2802#else /* HOSTAPD */
0915d02c 2803 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
072ad14c 2804#endif /* HOSTAPD */
0915d02c
JM		 2805 break;
2806 default:
2807 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2808 type);
2809 break;
2810 }
2811}
2812
2813
4b9841d3
JM		 2814static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2815 struct ieee80211_hdr *hdr, size_t len)
0915d02c 2816{
7da3abe7 2817#ifdef HOSTAPD
4b9841d3
JM		 2818 hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2819#else /* HOSTAPD */
3a57305f 2820 ap_rx_from_unknown_sta(drv->ctx, hdr, len);
7da3abe7 2821#endif /* HOSTAPD */
4b9841d3 2822}
0915d02c 2823
4b9841d3
JM		 2824
2825static void handle_frame(struct wpa_driver_nl80211_data *drv,
2826 u8 *buf, size_t len,
2827 struct hostapd_frame_info *hfi)
2828{
2829 struct ieee80211_hdr *hdr;
2830 u16 fc, stype;
0915d02c
JM		 2831
2832 hdr = (struct ieee80211_hdr *) buf;
2833 fc = le_to_host16(hdr->frame_control);
0915d02c
JM		 2834 stype = WLAN_FC_GET_STYPE(fc);
2835
4b9841d3 2836 switch (WLAN_FC_GET_TYPE(fc)) {
0915d02c
JM		 2837 case WLAN_FC_TYPE_MGMT:
2838 if (stype != WLAN_FC_STYPE_BEACON &&
2839 stype != WLAN_FC_STYPE_PROBE_REQ)
2840 wpa_printf(MSG_MSGDUMP, "MGMT");
7da3abe7 2841#ifdef HOSTAPD
4b9841d3 2842 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
7da3abe7 2843#else /* HOSTAPD */
4b9841d3 2844 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
7da3abe7 2845#endif /* HOSTAPD */
0915d02c
JM		 2846 break;
2847 case WLAN_FC_TYPE_CTRL:
2848 /* can only get here with PS-Poll frames */
2849 wpa_printf(MSG_DEBUG, "CTRL");
4b9841d3 2850 from_unknown_sta(drv, hdr, len);
0915d02c
JM		 2851 break;
2852 case WLAN_FC_TYPE_DATA:
4b9841d3 2853 from_unknown_sta(drv, hdr, len);
0915d02c
JM		 2854 break;
2855 }
2856}
2857
2858
2859static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2860{
2861 struct wpa_driver_nl80211_data *drv = eloop_ctx;
2862 int len;
2863 unsigned char buf[3000];
2864 struct ieee80211_radiotap_iterator iter;
2865 int ret;
2866 struct hostapd_frame_info hfi;
4b9841d3 2867 int injected = 0, failed = 0, rxflags = 0;
0915d02c
JM		 2868
2869 len = recv(sock, buf, sizeof(buf), 0);
2870 if (len < 0) {
2871 perror("recv");
2872 return;
2873 }
2874
2875 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2876 printf("received invalid radiotap frame\n");
2877 return;
2878 }
2879
2880 memset(&hfi, 0, sizeof(hfi));
2881
2882 while (1) {
2883 ret = ieee80211_radiotap_iterator_next(&iter);
2884 if (ret == -ENOENT)
2885 break;
2886 if (ret) {
2887 printf("received invalid radiotap frame (%d)\n", ret);
2888 return;
2889 }
2890 switch (iter.this_arg_index) {
2891 case IEEE80211_RADIOTAP_FLAGS:
2892 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2893 len -= 4;
2894 break;
2895 case IEEE80211_RADIOTAP_RX_FLAGS:
2896 rxflags = 1;
2897 break;
2898 case IEEE80211_RADIOTAP_TX_FLAGS:
2899 injected = 1;
2900 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2901 IEEE80211_RADIOTAP_F_TX_FAIL;
2902 break;
2903 case IEEE80211_RADIOTAP_DATA_RETRIES:
2904 break;
2905 case IEEE80211_RADIOTAP_CHANNEL:
2906 /* TODO convert from freq/flags to channel number
2907 hfi.channel = XXX;
2908 hfi.phytype = XXX;
2909 */
2910 break;
2911 case IEEE80211_RADIOTAP_RATE:
2912 hfi.datarate = *iter.this_arg * 5;
2913 break;
2914 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2915 hfi.ssi_signal = *iter.this_arg;
2916 break;
2917 }
2918 }
2919
2920 if (rxflags && injected)
2921 return;
2922
2923 if (!injected)
4b9841d3
JM		 2924 handle_frame(drv, buf + iter.max_length,
2925 len - iter.max_length, &hfi);
0915d02c 2926 else
4b9841d3
JM		 2927 handle_tx_callback(drv->ctx, buf + iter.max_length,
2928 len - iter.max_length, !failed);
0915d02c
JM		 2929}
2930
2931
2932/*
2933 * we post-process the filter code later and rewrite
2934 * this to the offset to the last instruction
2935 */
2936#define PASS 0xFF
2937#define FAIL 0xFE
2938
2939static struct sock_filter msock_filter_insns[] = {
2940 /*
2941 * do a little-endian load of the radiotap length field
2942 */
2943 /* load lower byte into A */
2944 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
2945 /* put it into X (== index register) */
2946 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2947 /* load upper byte into A */
2948 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
2949 /* left-shift it by 8 */
2950 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2951 /* or with X */
2952 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2953 /* put result into X */
2954 BPF_STMT(BPF_MISC| BPF_TAX, 0),
2955
2956 /*
2957 * Allow management frames through, this also gives us those
2958 * management frames that we sent ourselves with status
2959 */
2960 /* load the lower byte of the IEEE 802.11 frame control field */
2961 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2962 /* mask off frame type and version */
2963 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2964 /* accept frame if it's both 0, fall through otherwise */
2965 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2966
2967 /*
2968 * TODO: add a bit to radiotap RX flags that indicates
2969 * that the sending station is not associated, then
2970 * add a filter here that filters on our DA and that flag
2971 * to allow us to deauth frames to that bad station.
2972 *
2973 * Not a regression -- we didn't do it before either.
2974 */
2975
2976#if 0
2977 /*
2978 * drop non-data frames, WDS frames
2979 */
2980 /* load the lower byte of the frame control field */
2981 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2982 /* mask off QoS bit */
2983 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
2984 /* drop non-data frames */
2985 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
2986 /* load the upper byte of the frame control field */
2987 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2988 /* mask off toDS/fromDS */
2989 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
2990 /* drop WDS frames */
2991 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
2992#endif
2993
2994 /*
2995 * add header length to index
2996 */
2997 /* load the lower byte of the frame control field */
2998 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
2999 /* mask off QoS bit */
3000 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
3001 /* right shift it by 6 to give 0 or 2 */
3002 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
3003 /* add data frame header length */
3004 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
3005 /* add index, was start of 802.11 header */
3006 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
3007 /* move to index, now start of LL header */
3008 BPF_STMT(BPF_MISC | BPF_TAX, 0),
3009
3010 /*
3011 * Accept empty data frames, we use those for
3012 * polling activity.
3013 */
3014 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
3015 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3016
3017 /*
3018 * Accept EAPOL frames
3019 */
3020 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
3021 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3022 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
3023 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3024
3025 /* keep these last two statements or change the code below */
3026 /* return 0 == "DROP" */
3027 BPF_STMT(BPF_RET | BPF_K, 0),
3028 /* return ~0 == "keep all" */
3029 BPF_STMT(BPF_RET | BPF_K, ~0),
3030};
3031
3032static struct sock_fprog msock_filter = {
3033 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3034 .filter = msock_filter_insns,
3035};
3036
3037
3038static int add_monitor_filter(int s)
3039{
3040 int idx;
3041
3042 /* rewrite all PASS/FAIL jump offsets */
3043 for (idx = 0; idx < msock_filter.len; idx++) {
3044 struct sock_filter *insn = &msock_filter_insns[idx];
3045
3046 if (BPF_CLASS(insn->code) == BPF_JMP) {
3047 if (insn->code == (BPF_JMP|BPF_JA)) {
3048 if (insn->k == PASS)
3049 insn->k = msock_filter.len - idx - 2;
3050 else if (insn->k == FAIL)
3051 insn->k = msock_filter.len - idx - 3;
3052 }
3053
3054 if (insn->jt == PASS)
3055 insn->jt = msock_filter.len - idx - 2;
3056 else if (insn->jt == FAIL)
3057 insn->jt = msock_filter.len - idx - 3;
3058
3059 if (insn->jf == PASS)
3060 insn->jf = msock_filter.len - idx - 2;
3061 else if (insn->jf == FAIL)
3062 insn->jf = msock_filter.len - idx - 3;
3063 }
3064 }
3065
3066 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3067 &msock_filter, sizeof(msock_filter))) {
3068 perror("SO_ATTACH_FILTER");
3069 return -1;
3070 }
3071
3072 return 0;
3073}
3074
3075
460456f8
JM		 3076static void nl80211_remove_monitor_interface(
3077 struct wpa_driver_nl80211_data *drv)
3078{
3079 if (drv->monitor_ifidx >= 0) {
3080 nl80211_remove_iface(drv, drv->monitor_ifidx);
3081 drv->monitor_ifidx = -1;
3082 }
3083}
3084
3085
0915d02c
JM		 3086static int
3087nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3088{
3089 char buf[IFNAMSIZ];
3090 struct sockaddr_ll ll;
3091 int optval;
3092 socklen_t optlen;
0915d02c
JM		 3093
3094 snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3095 buf[IFNAMSIZ - 1] = '\0';
3096
3097 drv->monitor_ifidx =
2135f224 3098 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
0915d02c
JM		 3099
3100 if (drv->monitor_ifidx < 0)
3101 return -1;
3102
2135f224 3103 if (hostapd_set_iface_flags(drv, buf, 1))
0915d02c 3104 goto error;
0915d02c
JM		 3105
3106 memset(&ll, 0, sizeof(ll));
3107 ll.sll_family = AF_PACKET;
3108 ll.sll_ifindex = drv->monitor_ifidx;
3109 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3110 if (drv->monitor_sock < 0) {
3111 perror("socket[PF_PACKET,SOCK_RAW]");
3112 goto error;
3113 }
3114
3115 if (add_monitor_filter(drv->monitor_sock)) {
3116 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3117 "interface; do filtering in user space");
3118 /* This works, but will cost in performance. */
3119 }
3120
2135f224 3121 if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
0915d02c
JM		 3122 perror("monitor socket bind");
3123 goto error;
3124 }
3125
3126 optlen = sizeof(optval);
3127 optval = 20;
3128 if (setsockopt
3129 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3130 perror("Failed to set socket priority");
3131 goto error;
3132 }
3133
3134 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3135 drv, NULL)) {
3136 printf("Could not register monitor read socket\n");
3137 goto error;
3138 }
3139
3140 return 0;
3141 error:
460456f8 3142 nl80211_remove_monitor_interface(drv);
0915d02c
JM		 3143 return -1;
3144}
3145
db149ac9
JM		 3146
3147static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3148
3149static int wpa_driver_nl80211_hapd_send_eapol(
3150 void *priv, const u8 *addr, const u8 *data,
3151 size_t data_len, int encrypt, const u8 *own_addr)
3152{
3153 struct wpa_driver_nl80211_data *drv = priv;
3154 struct ieee80211_hdr *hdr;
3155 size_t len;
3156 u8 *pos;
3157 int res;
3158#if 0 /* FIX */
3159 int qos = sta->flags & WLAN_STA_WME;
3160#else
3161 int qos = 0;
3162#endif
3163
3164 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3165 data_len;
3166 hdr = os_zalloc(len);
3167 if (hdr == NULL) {
3168 printf("malloc() failed for i802_send_data(len=%lu)\n",
3169 (unsigned long) len);
3170 return -1;
3171 }
3172
3173 hdr->frame_control =
3174 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3175 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3176 if (encrypt)
3177 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3178#if 0 /* To be enabled if qos determination is added above */
3179 if (qos) {
3180 hdr->frame_control |=
3181 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3182 }
3183#endif
3184
3185 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3186 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3187 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3188 pos = (u8 *) (hdr + 1);
3189
3190#if 0 /* To be enabled if qos determination is added above */
3191 if (qos) {
3192 /* add an empty QoS header if needed */
3193 pos[0] = 0;
3194 pos[1] = 0;
3195 pos += 2;
3196 }
3197#endif
3198
3199 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3200 pos += sizeof(rfc1042_header);
3201 WPA_PUT_BE16(pos, ETH_P_PAE);
3202 pos += 2;
3203 memcpy(pos, data, data_len);
3204
3205 res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3206 if (res < 0) {
3207 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3208 "failed: %d (%s)",
3209 (unsigned long) len, errno, strerror(errno));
3210 }
3211 free(hdr);
3212
3213 return res;
3214}
3215
a8d6ffa4 3216
7e76ee9c
JM		 3217static u32 sta_flags_nl80211(int flags)
3218{
3219 u32 f = 0;
3220
3221 if (flags & WLAN_STA_AUTHORIZED)
3222 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3223 if (flags & WLAN_STA_WMM)
3224 f |= BIT(NL80211_STA_FLAG_WME);
3225 if (flags & WLAN_STA_SHORT_PREAMBLE)
3226 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3227 if (flags & WLAN_STA_MFP)
3228 f |= BIT(NL80211_STA_FLAG_MFP);
3229
3230 return f;
3231}
3232
3233
a8d6ffa4
JM		 3234static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3235 int total_flags, int flags_or,
3236 int flags_and)
3237{
3238 struct wpa_driver_nl80211_data *drv = priv;
3239 struct nl_msg *msg, *flags = NULL;
7e76ee9c 3240 struct nl80211_sta_flag_update upd;
a8d6ffa4
JM		 3241
3242 msg = nlmsg_alloc();
3243 if (!msg)
3244 return -ENOMEM;
3245
3246 flags = nlmsg_alloc();
3247 if (!flags) {
3248 nlmsg_free(msg);
3249 return -ENOMEM;
3250 }
3251
3252 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3253 0, NL80211_CMD_SET_STATION, 0);
3254
3255 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3256 if_nametoindex(drv->ifname));
3257 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3258
7e76ee9c
JM		 3259 /*
3260 * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3261 * can be removed eventually.
3262 */
a8d6ffa4
JM		 3263 if (total_flags & WLAN_STA_AUTHORIZED)
3264 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3265
3266 if (total_flags & WLAN_STA_WMM)
3267 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3268
3269 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3270 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3271
3272 if (total_flags & WLAN_STA_MFP)
3273 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3274
3275 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3276 goto nla_put_failure;
3277
7e76ee9c
JM		 3278 os_memset(&upd, 0, sizeof(upd));
3279 upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3280 upd.set = sta_flags_nl80211(flags_or);
3281 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3282
a8d6ffa4
JM		 3283 nlmsg_free(flags);
3284
3285 return send_and_recv_msgs(drv, msg, NULL, NULL);
3286 nla_put_failure:
3287 nlmsg_free(flags);
3288 return -ENOBUFS;
3289}
3290
2135f224
JM		 3291#endif /* CONFIG_AP || HOSTAPD */
3292
3293#ifdef CONFIG_AP
0915d02c 3294
1581b38b
JM		 3295static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3296 struct wpa_driver_associate_params *params)
3297{
3298 if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
f019981a 3299 wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
460456f8 3300 nl80211_remove_monitor_interface(drv);
1581b38b 3301 return -1;
0915d02c 3302 }
1581b38b
JM		 3303
3304 /* TODO: setup monitor interface (and add code somewhere to remove this
3305 * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
1581b38b
JM		 3306
3307 return 0;
3308}
3309#endif /* CONFIG_AP */
3310
3311
cfaab580
ZY		 3312static int wpa_driver_nl80211_connect(
3313 struct wpa_driver_nl80211_data *drv,
3314 struct wpa_driver_associate_params *params)
3315{
3316 struct nl_msg *msg;
3317 enum nl80211_auth_type type;
3318 int ret = 0;
3319
3320 msg = nlmsg_alloc();
3321 if (!msg)
3322 return -1;
3323
3324 wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3325 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3326 NL80211_CMD_CONNECT, 0);
3327
3328 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3329 if (params->bssid) {
3330 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3331 MAC2STR(params->bssid));
3332 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3333 }
3334 if (params->freq) {
3335 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3336 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3337 }
3338 if (params->ssid) {
3339 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3340 params->ssid, params->ssid_len);
3341 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3342 params->ssid);
3343 if (params->ssid_len > sizeof(drv->ssid))
3344 goto nla_put_failure;
3345 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3346 drv->ssid_len = params->ssid_len;
3347 }
3348 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3349 if (params->wpa_ie)
3350 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3351 params->wpa_ie);
3352
3353 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3354 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3355 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3356 type = NL80211_AUTHTYPE_SHARED_KEY;
3357 else if (params->auth_alg & AUTH_ALG_LEAP)
3358 type = NL80211_AUTHTYPE_NETWORK_EAP;
3359 else if (params->auth_alg & AUTH_ALG_FT)
3360 type = NL80211_AUTHTYPE_FT;
3361 else
3362 goto nla_put_failure;
3363
3364 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
3365 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3366
3367 if (params->wpa_ie && params->wpa_ie_len) {
3368 enum nl80211_wpa_versions ver;
3369
3370 if (params->wpa_ie[0] == WLAN_EID_RSN)
3371 ver = NL80211_WPA_VERSION_2;
3372 else
3373 ver = NL80211_WPA_VERSION_1;
3374
3375 wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
3376 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3377 }
3378
3379 if (params->pairwise_suite != CIPHER_NONE) {
c1bb3e0a 3380 int cipher;
cfaab580
ZY		 3381
3382 switch (params->pairwise_suite) {
3383 case CIPHER_WEP40:
3384 cipher = WLAN_CIPHER_SUITE_WEP40;
3385 break;
3386 case CIPHER_WEP104:
3387 cipher = WLAN_CIPHER_SUITE_WEP104;
3388 break;
3389 case CIPHER_CCMP:
3390 cipher = WLAN_CIPHER_SUITE_CCMP;
3391 break;
3392 case CIPHER_TKIP:
3393 default:
3394 cipher = WLAN_CIPHER_SUITE_TKIP;
3395 break;
3396 }
3397 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3398 }
3399
3400 if (params->group_suite != CIPHER_NONE) {
c1bb3e0a 3401 int cipher;
cfaab580
ZY		 3402
3403 switch (params->group_suite) {
3404 case CIPHER_WEP40:
3405 cipher = WLAN_CIPHER_SUITE_WEP40;
3406 break;
3407 case CIPHER_WEP104:
3408 cipher = WLAN_CIPHER_SUITE_WEP104;
3409 break;
3410 case CIPHER_CCMP:
3411 cipher = WLAN_CIPHER_SUITE_CCMP;
3412 break;
3413 case CIPHER_TKIP:
3414 default:
3415 cipher = WLAN_CIPHER_SUITE_TKIP;
3416 break;
3417 }
3418 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3419 }
3420
3421 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3422 params->key_mgmt_suite == KEY_MGMT_PSK) {
3423 int mgmt = WLAN_AKM_SUITE_PSK;
3424
3425 switch (params->key_mgmt_suite) {
3426 case KEY_MGMT_802_1X:
3427 mgmt = WLAN_AKM_SUITE_8021X;
3428 break;
3429 case KEY_MGMT_PSK:
3430 default:
3431 mgmt = WLAN_AKM_SUITE_PSK;
3432 break;
3433 }
3434 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3435 }
3436
3437 ret = nl80211_set_conn_keys(params, msg);
3438 if (ret)
3439 goto nla_put_failure;
3440
3441 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3442 msg = NULL;
3443 if (ret) {
3444 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3445 "(%s)", ret, strerror(-ret));
3446 goto nla_put_failure;
3447 }
3448 ret = 0;
3449 wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3450
3451nla_put_failure:
3452 nlmsg_free(msg);
3453 return ret;
3454
3455}
3456
3457
c2a04078
JM		 3458static int wpa_driver_nl80211_associate(
3459 void *priv, struct wpa_driver_associate_params *params)
3460{
3461 struct wpa_driver_nl80211_data *drv = priv;
3462 int ret = -1;
3463 struct nl_msg *msg;
3464
1581b38b
JM		 3465#ifdef CONFIG_AP
3466 if (params->mode == 2)
3467 return wpa_driver_nl80211_ap(drv, params);
3468#endif /* CONFIG_AP */
3469
4a867032
JM		 3470 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3471 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3472 return -1;
cfaab580 3473 return wpa_driver_nl80211_connect(drv, params);
4a867032 3474 }
cfaab580 3475
c2a04078
JM		 3476 drv->associated = 0;
3477
3478 msg = nlmsg_alloc();
3479 if (!msg)
3480 return -1;
3481
3482 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3483 drv->ifindex);
3484 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3485 NL80211_CMD_ASSOCIATE, 0);
3486
3487 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3488 if (params->bssid) {
3489 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
3490 MAC2STR(params->bssid));
3491 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3492 }
3493 if (params->freq) {
3494 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
3495 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3496 }
3497 if (params->ssid) {
3498 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
3499 params->ssid, params->ssid_len);
3500 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3501 params->ssid);
fd05d64e
JM		 3502 if (params->ssid_len > sizeof(drv->ssid))
3503 goto nla_put_failure;
3504 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3505 drv->ssid_len = params->ssid_len;
c2a04078
JM		 3506 }
3507 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
3508 if (params->wpa_ie)
3509 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3510 params->wpa_ie);
3511
e572fa33
JM		 3512#ifdef CONFIG_IEEE80211W
3513 if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3514 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3515#endif /* CONFIG_IEEE80211W */
3516
01652550
JM		 3517 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3518
62fa124c
JM		 3519 if (params->prev_bssid) {
3520 wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
3521 MAC2STR(params->prev_bssid));
3522 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3523 params->prev_bssid);
3524 }
3525
c2a04078
JM		 3526 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3527 msg = NULL;
3528 if (ret) {
3529 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3530 "(%s)", ret, strerror(-ret));
3531 goto nla_put_failure;
3532 }
3533 ret = 0;
3534 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3535 "successfully");
3536
3537nla_put_failure:
3538 nlmsg_free(msg);
3539 return ret;
3540}
3f5285e8
JM		 3541
3542
ad1e68e6
JM		 3543static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3544 int ifindex, int mode)
3f5285e8 3545{
3f5285e8 3546 struct nl_msg *msg;
ad1e68e6
JM		 3547 int ret = -ENOBUFS;
3548
3549 msg = nlmsg_alloc();
3550 if (!msg)
3551 return -ENOMEM;
3552
3553 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3554 0, NL80211_CMD_SET_INTERFACE, 0);
3555 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3556 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3557
3558 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3559 if (!ret)
3560 return 0;
3561nla_put_failure:
3562 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3563 " %d (%s)", ifindex, mode, ret, strerror(-ret));
3564 return ret;
3565}
3566
3567
3568static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3569{
3570 struct wpa_driver_nl80211_data *drv = priv;
3571 int ret = -1;
1581b38b
JM		 3572 int nlmode;
3573
3574 switch (mode) {
3575 case 0:
3576 nlmode = NL80211_IFTYPE_STATION;
3577 break;
3578 case 1:
3579 nlmode = NL80211_IFTYPE_ADHOC;
3580 break;
3581 case 2:
3582 nlmode = NL80211_IFTYPE_AP;
3583 break;
3584 default:
3585 return -1;
3586 }
3f5285e8 3587
ad1e68e6
JM		 3588 if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3589 drv->nlmode = nlmode;
460456f8
JM		 3590 ret = 0;
3591 goto done;
ad1e68e6 3592 }
3f5285e8 3593
460456f8
JM		 3594 if (nlmode == drv->nlmode) {
3595 ret = 0;
3596 goto done; /* Already in the requested mode */
3597 }
3f5285e8 3598
3f5285e8
JM		 3599 /* mac80211 doesn't allow mode changes while the device is up, so
3600 * take the device down, try to set the mode again, and bring the
3601 * device back up.
3602 */
2135f224 3603 if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3f5285e8 3604 /* Try to set the mode again while the interface is down */
ad1e68e6 3605 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
2135f224
JM		 3606 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3607 ret = -1;
3f5285e8
JM		 3608 }
3609
ad1e68e6
JM		 3610 if (!ret)
3611 drv->nlmode = nlmode;
3612
460456f8
JM		 3613done:
3614#if defined(CONFIG_AP) || defined(HOSTAPD)
3615 if (!ret && nlmode == NL80211_IFTYPE_AP) {
3616 /* Setup additional AP mode functionality if needed */
3617 if (drv->monitor_ifidx < 0 &&
3618 nl80211_create_monitor_interface(drv))
3619 return -1;
3620 } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3621 /* Remove additional AP mode functionality */
3622 nl80211_remove_monitor_interface(drv);
3623 }
3624#endif /* CONFIG_AP || HOSTAPD */
3625
3f5285e8
JM		 3626 return ret;
3627}
3628
3629
3f5285e8
JM		 3630static int wpa_driver_nl80211_get_capa(void *priv,
3631 struct wpa_driver_capa *capa)
3632{
3633 struct wpa_driver_nl80211_data *drv = priv;
3634 if (!drv->has_capability)
3635 return -1;
3636 os_memcpy(capa, &drv->capa, sizeof(*capa));
3637 return 0;
3638}
3639
3640
3641static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3642{
3643 struct wpa_driver_nl80211_data *drv = priv;
3644
3645 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3646 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3647 drv->operstate = state;
3648 return wpa_driver_nl80211_send_oper_ifla(
3649 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3650}
3651
01652550
JM		 3652
3653static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3654{
3655 struct wpa_driver_nl80211_data *drv = priv;
3656 struct nl_msg *msg;
3657 struct nl80211_sta_flag_update upd;
3658
3659 msg = nlmsg_alloc();
3660 if (!msg)
3661 return -ENOMEM;
3662
3663 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3664 0, NL80211_CMD_SET_STATION, 0);
3665
3666 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3667 if_nametoindex(drv->ifname));
3668 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3669
3670 os_memset(&upd, 0, sizeof(upd));
3671 upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3672 if (authorized)
3673 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3674 NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3675
3676 return send_and_recv_msgs(drv, msg, NULL, NULL);
3677 nla_put_failure:
3678 return -ENOBUFS;
3679}
3680
3f5285e8 3681
c5121837
JM		 3682#ifdef HOSTAPD
3683
c5121837 3684static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
b4fd6fab 3685 int ifindex)
c5121837
JM		 3686{
3687 struct i802_bss *bss = &drv->bss;
3688 while (bss) {
b4fd6fab 3689 if (ifindex == bss->ifindex)
c5121837
JM		 3690 return bss;
3691 bss = bss->next;
3692 }
b4fd6fab 3693 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
c5121837
JM		 3694 return NULL;
3695}
3696
3697
3698static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3699{
3700 int i;
3701 int *old;
3702
3703 wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3704 ifidx);
3705 for (i = 0; i < drv->num_if_indices; i++) {
3706 if (drv->if_indices[i] == 0) {
3707 drv->if_indices[i] = ifidx;
3708 return;
3709 }
3710 }
3711
3712 if (drv->if_indices != drv->default_if_indices)
3713 old = drv->if_indices;
3714 else
3715 old = NULL;
3716
3717 drv->if_indices = realloc(old,
3718 sizeof(int) * (drv->num_if_indices + 1));
3719 if (!drv->if_indices) {
3720 if (!old)
3721 drv->if_indices = drv->default_if_indices;
3722 else
3723 drv->if_indices = old;
3724 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3725 "interfaces");
3726 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3727 return;
3728 }
3729 drv->if_indices[drv->num_if_indices] = ifidx;
3730 drv->num_if_indices++;
3731}
3732
3733
3734static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3735{
3736 int i;
3737
3738 for (i = 0; i < drv->num_if_indices; i++) {
3739 if (drv->if_indices[i] == ifidx) {
3740 drv->if_indices[i] = 0;
3741 break;
3742 }
3743 }
3744}
3745
3746
3747static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3748{
3749 int i;
3750
3751 for (i = 0; i < drv->num_if_indices; i++)
3752 if (drv->if_indices[i] == ifidx)
3753 return 1;
3754
3755 return 0;
3756}
3757
3758
c5121837
JM		 3759static inline int min_int(int a, int b)
3760{
3761 if (a < b)
3762 return a;
3763 return b;
3764}
3765
3766
3767static int get_key_handler(struct nl_msg *msg, void *arg)
3768{
3769 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3770 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3771
3772 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3773 genlmsg_attrlen(gnlh, 0), NULL);
3774
3775 /*
3776 * TODO: validate the key index and mac address!
3777 * Otherwise, there's a race condition as soon as
3778 * the kernel starts sending key notifications.
3779 */
3780
3781 if (tb[NL80211_ATTR_KEY_SEQ])
3782 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3783 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3784 return NL_SKIP;
3785}
3786
3787
3788static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3789 int idx, u8 *seq)
3790{
3791 struct wpa_driver_nl80211_data *drv = priv;
3792 struct nl_msg *msg;
3793
3794 msg = nlmsg_alloc();
3795 if (!msg)
3796 return -ENOMEM;
3797
3798 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3799 0, NL80211_CMD_GET_KEY, 0);
3800
3801 if (addr)
3802 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3803 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3804 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3805
3806 memset(seq, 0, 6);
3807
3808 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3809 nla_put_failure:
3810 return -ENOBUFS;
3811}
3812
3813
3814static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3815 int mode)
3816{
3817 struct wpa_driver_nl80211_data *drv = priv;
3818 struct nl_msg *msg;
3819 u8 rates[NL80211_MAX_SUPP_RATES];
3820 u8 rates_len = 0;
3821 int i;
3822
3823 msg = nlmsg_alloc();
3824 if (!msg)
3825 return -ENOMEM;
3826
3827 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3828 NL80211_CMD_SET_BSS, 0);
3829
3830 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3831 rates[rates_len++] = basic_rates[i] / 5;
3832
3833 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3834
3835 /* TODO: multi-BSS support */
3836 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3837
3838 return send_and_recv_msgs(drv, msg, NULL, NULL);
3839 nla_put_failure:
3840 return -ENOBUFS;
3841}
3842
3843
c5121837
JM		 3844/* Set kernel driver on given frequency (MHz) */
3845static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3846{
3847 struct wpa_driver_nl80211_data *drv = priv;
f019981a
JM		 3848 return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3849 freq->sec_channel_offset);
c5121837
JM		 3850}
3851
3852
3853static int i802_set_rts(void *priv, int rts)
3854{
3855 struct wpa_driver_nl80211_data *drv = priv;
ad649451
JM		 3856 struct nl_msg *msg;
3857 int ret = -ENOBUFS;
3858 u32 val;
c5121837 3859
ad649451
JM		 3860 msg = nlmsg_alloc();
3861 if (!msg)
3862 return -ENOMEM;
c5121837 3863
ad649451
JM		 3864 if (rts >= 2347)
3865 val = (u32) -1;
3866 else
3867 val = rts;
c5121837 3868
ad649451
JM		 3869 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3870 0, NL80211_CMD_SET_WIPHY, 0);
3871 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3872 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3873
3874 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3875 if (!ret)
3876 return 0;
3877nla_put_failure:
3878 wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3879 "%d (%s)", rts, ret, strerror(-ret));
3880 return ret;
c5121837
JM		 3881}
3882
3883
3884static int i802_set_frag(void *priv, int frag)
3885{
3886 struct wpa_driver_nl80211_data *drv = priv;
ad649451
JM		 3887 struct nl_msg *msg;
3888 int ret = -ENOBUFS;
3889 u32 val;
c5121837 3890
ad649451
JM		 3891 msg = nlmsg_alloc();
3892 if (!msg)
3893 return -ENOMEM;
c5121837 3894
ad649451
JM		 3895 if (frag >= 2346)
3896 val = (u32) -1;
3897 else
3898 val = frag;
c5121837 3899
ad649451
JM		 3900 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3901 0, NL80211_CMD_SET_WIPHY, 0);
3902 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3903 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3904
3905 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3906 if (!ret)
3907 return 0;
3908nla_put_failure:
3909 wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3910 "%d: %d (%s)", frag, ret, strerror(-ret));
3911 return ret;
c5121837
JM		 3912}
3913
3914
c5121837
JM		 3915static int i802_flush(void *priv)
3916{
3917 struct wpa_driver_nl80211_data *drv = priv;
3918 struct nl_msg *msg;
3919
3920 msg = nlmsg_alloc();
3921 if (!msg)
3922 return -1;
3923
3924 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3925 0, NL80211_CMD_DEL_STATION, 0);
3926
3927 /*
3928 * XXX: FIX! this needs to flush all VLANs too
3929 */
3930 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3931 if_nametoindex(drv->ifname));
3932
3933 return send_and_recv_msgs(drv, msg, NULL, NULL);
3934 nla_put_failure:
3935 return -ENOBUFS;
3936}
3937
3938
3939static int get_sta_handler(struct nl_msg *msg, void *arg)
3940{
3941 struct nlattr *tb[NL80211_ATTR_MAX + 1];
3942 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3943 struct hostap_sta_driver_data *data = arg;
3944 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3945 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3946 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3947 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3948 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3949 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3950 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3951 };
3952
3953 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3954 genlmsg_attrlen(gnlh, 0), NULL);
3955
3956 /*
3957 * TODO: validate the interface and mac address!
3958 * Otherwise, there's a race condition as soon as
3959 * the kernel starts sending station notifications.
3960 */
3961
3962 if (!tb[NL80211_ATTR_STA_INFO]) {
3963 wpa_printf(MSG_DEBUG, "sta stats missing!");
3964 return NL_SKIP;
3965 }
3966 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3967 tb[NL80211_ATTR_STA_INFO],
3968 stats_policy)) {
3969 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3970 return NL_SKIP;
3971 }
3972
3973 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3974 data->inactive_msec =
3975 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3976 if (stats[NL80211_STA_INFO_RX_BYTES])
3977 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3978 if (stats[NL80211_STA_INFO_TX_BYTES])
3979 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3980 if (stats[NL80211_STA_INFO_RX_PACKETS])
3981 data->rx_packets =
3982 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3983 if (stats[NL80211_STA_INFO_TX_PACKETS])
3984 data->tx_packets =
3985 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3986
3987 return NL_SKIP;
3988}
3989
3990static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3991 const u8 *addr)
3992{
3993 struct wpa_driver_nl80211_data *drv = priv;
3994 struct nl_msg *msg;
3995
3996 os_memset(data, 0, sizeof(*data));
3997 msg = nlmsg_alloc();
3998 if (!msg)
3999 return -ENOMEM;
4000
4001 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4002 0, NL80211_CMD_GET_STATION, 0);
4003
4004 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4005 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4006
4007 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4008 nla_put_failure:
4009 return -ENOBUFS;
4010}
4011
4012
c5121837
JM		 4013static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4014 int cw_min, int cw_max, int burst_time)
4015{
4016 struct wpa_driver_nl80211_data *drv = priv;
4017 struct nl_msg *msg;
4018 struct nlattr *txq, *params;
4019
4020 msg = nlmsg_alloc();
4021 if (!msg)
4022 return -1;
4023
4024 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4025 0, NL80211_CMD_SET_WIPHY, 0);
4026
4027 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4028
4029 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4030 if (!txq)
4031 goto nla_put_failure;
4032
4033 /* We are only sending parameters for a single TXQ at a time */
4034 params = nla_nest_start(msg, 1);
4035 if (!params)
4036 goto nla_put_failure;
4037
4038 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4039 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4040 * 32 usec, so need to convert the value here. */
4041 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4042 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4043 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4044 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4045
4046 nla_nest_end(msg, params);
4047
4048 nla_nest_end(msg, txq);
4049
4050 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4051 return 0;
4052 nla_put_failure:
4053 return -1;
4054}
4055
4056
c5121837
JM		 4057static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4058{
4059 struct wpa_driver_nl80211_data *drv = priv;
4060 int ifidx;
4061 struct i802_bss *bss;
4062
4063 bss = os_zalloc(sizeof(*bss));
4064 if (bss == NULL)
4065 return -1;
c5121837
JM		 4066
4067 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4068 if (ifidx < 0) {
4069 os_free(bss);
4070 return -1;
4071 }
6d550fbe 4072 bss->ifindex = ifidx;
c5121837
JM		 4073 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4074 nl80211_remove_iface(priv, ifidx);
4075 os_free(bss);
4076 return -1;
4077 }
4078 bss->next = drv->bss.next;
4079 drv->bss.next = bss;
4080 return 0;
4081}
4082
4083
4084static int i802_bss_remove(void *priv, const char *ifname)
4085{
4086 struct wpa_driver_nl80211_data *drv = priv;
4087 struct i802_bss *bss, *prev;
b4fd6fab
JM		 4088 int ifindex = if_nametoindex(ifname);
4089 nl80211_remove_iface(priv, ifindex);
c5121837
JM		 4090 prev = &drv->bss;
4091 bss = drv->bss.next;
4092 while (bss) {
b4fd6fab 4093 if (ifindex == bss->ifindex) {
c5121837
JM		 4094 prev->next = bss->next;
4095 os_free(bss);
4096 break;
4097 }
4098 prev = bss;
4099 bss = bss->next;
4100 }
4101 return 0;
4102}
4103
4104
c5121837
JM		 4105static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4106{
4107 struct wpa_driver_nl80211_data *drv = priv;
4108 struct nl_msg *msg;
4109
4110 msg = nlmsg_alloc();
4111 if (!msg)
4112 return -ENOMEM;
4113
4114 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4115 NL80211_CMD_SET_BSS, 0);
4116
4117 if (cts >= 0)
4118 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4119 if (preamble >= 0)
4120 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4121 if (slot >= 0)
4122 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4123
4124 /* TODO: multi-BSS support */
4125 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4126
4127 return send_and_recv_msgs(drv, msg, NULL, NULL);
4128 nla_put_failure:
4129 return -ENOBUFS;
4130}
4131
4132
4133static int i802_set_cts_protect(void *priv, int value)
4134{
4135 return i802_set_bss(priv, value, -1, -1);
4136}
4137
4138
4139static int i802_set_preamble(void *priv, int value)
4140{
4141 return i802_set_bss(priv, -1, value, -1);
4142}
4143
4144
4145static int i802_set_short_slot_time(void *priv, int value)
4146{
4147 return i802_set_bss(priv, -1, -1, value);
4148}
4149
4150
4151static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4152{
4153 switch (type) {
4154 case HOSTAPD_IF_VLAN:
4155 return NL80211_IFTYPE_AP_VLAN;
c5121837
JM		 4156 }
4157 return -1;
4158}
4159
4160
4161static int i802_if_add(const char *iface, void *priv,
4162 enum hostapd_driver_if_type type, char *ifname,
4163 const u8 *addr)
4164{
4165 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4166 return -1;
4167 return 0;
4168}
4169
4170
4171static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4172 char *ifname, const u8 *addr)
4173{
4174 /* unused at the moment */
4175 return -1;
4176}
4177
4178
4179static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4180 const char *ifname, const u8 *addr)
4181{
4182 nl80211_remove_iface(priv, if_nametoindex(ifname));
4183 return 0;
4184}
4185
4186
c5121837
JM		 4187static int i802_set_sta_vlan(void *priv, const u8 *addr,
4188 const char *ifname, int vlan_id)
4189{
4190 struct wpa_driver_nl80211_data *drv = priv;
4191 struct nl_msg *msg;
4192
4193 msg = nlmsg_alloc();
4194 if (!msg)
4195 return -ENOMEM;
4196
4197 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4198 0, NL80211_CMD_SET_STATION, 0);
4199
4200 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4201 if_nametoindex(drv->ifname));
4202 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1c766b09 4203 NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
c5121837
JM		 4204 if_nametoindex(ifname));
4205
4206 return send_and_recv_msgs(drv, msg, NULL, NULL);
4207 nla_put_failure:
4208 return -ENOBUFS;
4209}
4210
4211
c5121837
JM		 4212static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4213{
4214 struct wpa_driver_nl80211_data *drv = eloop_ctx;
4215 struct sockaddr_ll lladdr;
4216 unsigned char buf[3000];
4217 int len;
4218 socklen_t fromlen = sizeof(lladdr);
4219
4220 len = recvfrom(sock, buf, sizeof(buf), 0,
4221 (struct sockaddr *)&lladdr, &fromlen);
4222 if (len < 0) {
4223 perror("recv");
4224 return;
4225 }
4226
4227 if (have_ifidx(drv, lladdr.sll_ifindex)) {
4b9841d3
JM		 4228 void *ctx;
4229 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4230 if (!ctx)
c5121837 4231 return;
4b9841d3 4232 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
c5121837
JM		 4233 }
4234}
4235
4236
c5121837
JM		 4237static int i802_get_inact_sec(void *priv, const u8 *addr)
4238{
4239 struct hostap_sta_driver_data data;
4240 int ret;
4241
4242 data.inactive_msec = (unsigned long) -1;
4243 ret = i802_read_sta_data(priv, &data, addr);
4244 if (ret || data.inactive_msec == (unsigned long) -1)
4245 return -1;
4246 return data.inactive_msec / 1000;
4247}
4248
4249
4250static int i802_sta_clear_stats(void *priv, const u8 *addr)
4251{
4252#if 0
4253 /* TODO */
4254#endif
4255 return 0;
4256}
4257
4258
731723a5
JM		 4259static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4260 int reason)
c5121837
JM		 4261{
4262 struct wpa_driver_nl80211_data *drv = priv;
4263 struct ieee80211_mgmt mgmt;
4264
4265 memset(&mgmt, 0, sizeof(mgmt));
4266 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4267 WLAN_FC_STYPE_DEAUTH);
4268 memcpy(mgmt.da, addr, ETH_ALEN);
731723a5
JM		 4269 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4270 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
c5121837 4271 mgmt.u.deauth.reason_code = host_to_le16(reason);
9f324b61
JM		 4272 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4273 IEEE80211_HDRLEN +
4274 sizeof(mgmt.u.deauth));
c5121837
JM		 4275}
4276
4277
731723a5
JM		 4278static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4279 int reason)
c5121837
JM		 4280{
4281 struct wpa_driver_nl80211_data *drv = priv;
4282 struct ieee80211_mgmt mgmt;
4283
4284 memset(&mgmt, 0, sizeof(mgmt));
4285 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4286 WLAN_FC_STYPE_DISASSOC);
4287 memcpy(mgmt.da, addr, ETH_ALEN);
731723a5
JM		 4288 memcpy(mgmt.sa, own_addr, ETH_ALEN);
4289 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
c5121837 4290 mgmt.u.disassoc.reason_code = host_to_le16(reason);
9f324b61
JM		 4291 return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4292 IEEE80211_HDRLEN +
4293 sizeof(mgmt.u.disassoc));
c5121837
JM		 4294}
4295
4296
92f475b4
JM		 4297static void *i802_init(struct hostapd_data *hapd,
4298 struct wpa_init_params *params)
c5121837
JM		 4299{
4300 struct wpa_driver_nl80211_data *drv;
4301 size_t i;
4302
bbaf0837
JM		 4303 drv = wpa_driver_nl80211_init(hapd, params->ifname);
4304 if (drv == NULL)
c5121837 4305 return NULL;
c5121837 4306
b4fd6fab 4307 drv->bss.ifindex = drv->ifindex;
c5121837
JM		 4308
4309 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4310 drv->if_indices = drv->default_if_indices;
92f475b4
JM		 4311 for (i = 0; i < params->num_bridge; i++) {
4312 if (params->bridge[i])
4313 add_ifidx(drv, if_nametoindex(params->bridge[i]));
c5121837 4314 }
c5121837 4315
ad1e68e6
JM		 4316 /* start listening for EAPOL on the default AP interface */
4317 add_ifidx(drv, drv->ifindex);
4318
6980c191
FF		 4319 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4320 goto failed;
ad1e68e6 4321
6980c191 4322 if (params->bssid) {
460456f8
JM		 4323 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4324 goto failed;
4325 }
ad1e68e6 4326
4a867032 4327 if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
ad1e68e6
JM		 4328 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4329 "into AP mode", drv->ifname);
bbaf0837 4330 goto failed;
ad1e68e6
JM		 4331 }
4332
4333 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
bbaf0837 4334 goto failed;
ad1e68e6
JM		 4335
4336 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4337 if (drv->eapol_sock < 0) {
4338 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
bbaf0837 4339 goto failed;
ad1e68e6
JM		 4340 }
4341
4342 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4343 {
4344 printf("Could not register read socket for eapol\n");
c5121837 4345 goto failed;
ad1e68e6
JM		 4346 }
4347
412036f5 4348 if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
bbaf0837 4349 goto failed;
c5121837 4350
c5121837
JM		 4351 return drv;
4352
4353failed:
460456f8 4354 nl80211_remove_monitor_interface(drv);
c5121837
JM		 4355 if (drv->ioctl_sock >= 0)
4356 close(drv->ioctl_sock);
c5121837
JM		 4357
4358 genl_family_put(drv->nl80211);
4359 nl_cache_free(drv->nl_cache);
4360 nl_handle_destroy(drv->nl_handle);
4361 nl_cb_put(drv->nl_cb);
4362
bbaf0837
JM		 4363 os_free(drv);
4364 return NULL;
4365}
c5121837 4366
c5121837 4367
bbaf0837
JM		 4368static void i802_deinit(void *priv)
4369{
4370 wpa_driver_nl80211_deinit(priv);
c5121837
JM		 4371}
4372
4373#endif /* HOSTAPD */
4374
4375
3f5285e8
JM		 4376const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4377 .name = "nl80211",
4378 .desc = "Linux nl80211/cfg80211",
4379 .get_bssid = wpa_driver_nl80211_get_bssid,
4380 .get_ssid = wpa_driver_nl80211_get_ssid,
3f5285e8 4381 .set_key = wpa_driver_nl80211_set_key,
6a1063e0 4382 .scan2 = wpa_driver_nl80211_scan,
3f5285e8
JM		 4383 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4384 .deauthenticate = wpa_driver_nl80211_deauthenticate,
4385 .disassociate = wpa_driver_nl80211_disassociate,
c2a04078 4386 .authenticate = wpa_driver_nl80211_authenticate,
3f5285e8 4387 .associate = wpa_driver_nl80211_associate,
3f5285e8
JM		 4388 .init = wpa_driver_nl80211_init,
4389 .deinit = wpa_driver_nl80211_deinit,
3f5285e8
JM		 4390 .get_capa = wpa_driver_nl80211_get_capa,
4391 .set_operstate = wpa_driver_nl80211_set_operstate,
01652550 4392 .set_supp_port = wpa_driver_nl80211_set_supp_port,
6d158490 4393 .set_country = wpa_driver_nl80211_set_country,
d2440ba0 4394 .set_beacon = wpa_driver_nl80211_set_beacon,
c3965310 4395#if defined(CONFIG_AP) || defined(HOSTAPD)
071f8ac4 4396 .send_mlme = wpa_driver_nl80211_send_mlme,
c3965310 4397 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
0f4e8b4f
JM		 4398 .sta_add = wpa_driver_nl80211_sta_add,
4399 .sta_remove = wpa_driver_nl80211_sta_remove,
db149ac9 4400 .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
a8d6ffa4 4401 .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
c3965310 4402#endif /* CONFIG_AP || HOSTAPD */
c5121837
JM		 4403#ifdef HOSTAPD
4404 .hapd_init = i802_init,
c5121837 4405 .hapd_deinit = i802_deinit,
c5121837
JM		 4406 .get_seqnum = i802_get_seqnum,
4407 .flush = i802_flush,
4408 .read_sta_data = i802_read_sta_data,
c5121837
JM		 4409 .sta_deauth = i802_sta_deauth,
4410 .sta_disassoc = i802_sta_disassoc,
c5121837
JM		 4411 .get_inact_sec = i802_get_inact_sec,
4412 .sta_clear_stats = i802_sta_clear_stats,
4413 .set_freq = i802_set_freq,
4414 .set_rts = i802_set_rts,
4415 .set_frag = i802_set_frag,
c5121837 4416 .set_rate_sets = i802_set_rate_sets,
c5121837
JM		 4417 .set_cts_protect = i802_set_cts_protect,
4418 .set_preamble = i802_set_preamble,
4419 .set_short_slot_time = i802_set_short_slot_time,
4420 .set_tx_queue_params = i802_set_tx_queue_params,
4421 .bss_add = i802_bss_add,
4422 .bss_remove = i802_bss_remove,
4423 .if_add = i802_if_add,
4424 .if_update = i802_if_update,
4425 .if_remove = i802_if_remove,
c5121837 4426 .set_sta_vlan = i802_set_sta_vlan,
c5121837 4427#endif /* HOSTAPD */
3f5285e8 4428};
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