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Share a single Linux ioctl helper fo setting interface up/down
[hostap-gosc2009.git] / src / drivers / driver_hostap.c
blob39b17b622b7d8f6ea949bd0f11026c8f318407e4
1 /*
2 * Driver interaction with Linux Host AP driver
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16 #include <sys/ioctl.h>
17
18 #include "wireless_copy.h"
19 #include "common.h"
20 #include "driver.h"
21 #include "driver_wext.h"
22 #include "eloop.h"
23 #include "driver_hostap.h"
24
25
26 #ifdef HOSTAPD
27
28 #include <net/if_arp.h>
29 #include <netpacket/packet.h>
30
31 #include "priv_netlink.h"
32 #include "netlink.h"
33 #include "linux_ioctl.h"
34 #include "common/ieee802_11_defs.h"
35
36
37 /* MTU to be set for the wlan#ap device; this is mainly needed for IEEE 802.1X
38 * frames that might be longer than normal default MTU and they are not
39 * fragmented */
40 #define HOSTAPD_MTU 2290
41
42 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
43
44 struct hostap_driver_data {
45 struct hostapd_data *hapd;
46
47 char iface[IFNAMSIZ + 1];
48 int sock; /* raw packet socket for driver access */
49 int ioctl_sock; /* socket for ioctl() use */
50 struct netlink_data *netlink;
51
52 int we_version;
53
54 u8 *generic_ie;
55 size_t generic_ie_len;
56 u8 *wps_ie;
57 size_t wps_ie_len;
58 };
59
60
61 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
62 int len);
63 static int hostap_set_iface_flags(void *priv, int dev_up);
64
65 static void handle_data(struct hostap_driver_data *drv, u8 *buf, size_t len,
66 u16 stype)
67 {
68 struct ieee80211_hdr *hdr;
69 u16 fc, ethertype;
70 u8 *pos, *sa;
71 size_t left;
72 union wpa_event_data event;
73
74 if (len < sizeof(struct ieee80211_hdr))
75 return;
76
77 hdr = (struct ieee80211_hdr *) buf;
78 fc = le_to_host16(hdr->frame_control);
79
80 if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) {
81 printf("Not ToDS data frame (fc=0x%04x)\n", fc);
82 return;
83 }
84
85 sa = hdr->addr2;
86 os_memset(&event, 0, sizeof(event));
87 event.rx_from_unknown.frame = buf;
88 event.rx_from_unknown.len = len;
89 wpa_supplicant_event(drv->hapd, EVENT_RX_FROM_UNKNOWN, &event);
90
91 pos = (u8 *) (hdr + 1);
92 left = len - sizeof(*hdr);
93
94 if (left < sizeof(rfc1042_header)) {
95 printf("Too short data frame\n");
96 return;
97 }
98
99 if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) {
100 printf("Data frame with no RFC1042 header\n");
101 return;
102 }
103 pos += sizeof(rfc1042_header);
104 left -= sizeof(rfc1042_header);
105
106 if (left < 2) {
107 printf("No ethertype in data frame\n");
108 return;
109 }
110
111 ethertype = WPA_GET_BE16(pos);
112 pos += 2;
113 left -= 2;
114 switch (ethertype) {
115 case ETH_P_PAE:
116 drv_event_eapol_rx(drv->hapd, sa, pos, left);
117 break;
118
119 default:
120 printf("Unknown ethertype 0x%04x in data frame\n", ethertype);
121 break;
122 }
123 }
124
125
126 static void handle_tx_callback(struct hostap_driver_data *drv, u8 *buf,
127 size_t len, int ok)
128 {
129 struct ieee80211_hdr *hdr;
130 u16 fc;
131 union wpa_event_data event;
132
133 hdr = (struct ieee80211_hdr *) buf;
134 fc = le_to_host16(hdr->frame_control);
135
136 os_memset(&event, 0, sizeof(event));
137 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
138 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
139 event.tx_status.dst = hdr->addr1;
140 event.tx_status.data = buf;
141 event.tx_status.data_len = len;
142 event.tx_status.ack = ok;
143 wpa_supplicant_event(drv->hapd, EVENT_TX_STATUS, &event);
144 }
145
146
147 static void handle_frame(struct hostap_driver_data *drv, u8 *buf, size_t len)
148 {
149 struct ieee80211_hdr *hdr;
150 u16 fc, extra_len, type, stype;
151 unsigned char *extra = NULL;
152 size_t data_len = len;
153 int ver;
154 union wpa_event_data event;
155
156 /* PSPOLL is only 16 bytes, but driver does not (at least yet) pass
157 * these to user space */
158 if (len < 24) {
159 wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)",
160 (unsigned long) len);
161 return;
162 }
163
164 hdr = (struct ieee80211_hdr *) buf;
165 fc = le_to_host16(hdr->frame_control);
166 type = WLAN_FC_GET_TYPE(fc);
167 stype = WLAN_FC_GET_STYPE(fc);
168
169 if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) {
170 wpa_hexdump(MSG_MSGDUMP, "Received management frame",
171 buf, len);
172 }
173
174 ver = fc & WLAN_FC_PVER;
175
176 /* protocol version 3 is reserved for indicating extra data after the
177 * payload, version 2 for indicating ACKed frame (TX callbacks), and
178 * version 1 for indicating failed frame (no ACK, TX callbacks) */
179 if (ver == 3) {
180 u8 *pos = buf + len - 2;
181 extra_len = WPA_GET_LE16(pos);
182 printf("extra data in frame (elen=%d)\n", extra_len);
183 if ((size_t) extra_len + 2 > len) {
184 printf(" extra data overflow\n");
185 return;
186 }
187 len -= extra_len + 2;
188 extra = buf + len;
189 } else if (ver == 1 || ver == 2) {
190 handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0);
191 return;
192 } else if (ver != 0) {
193 printf("unknown protocol version %d\n", ver);
194 return;
195 }
196
197 switch (type) {
198 case WLAN_FC_TYPE_MGMT:
199 os_memset(&event, 0, sizeof(event));
200 event.rx_mgmt.frame = buf;
201 event.rx_mgmt.frame_len = data_len;
202 wpa_supplicant_event(drv->hapd, EVENT_RX_MGMT, &event);
203 break;
204 case WLAN_FC_TYPE_CTRL:
205 wpa_printf(MSG_DEBUG, "CTRL");
206 break;
207 case WLAN_FC_TYPE_DATA:
208 wpa_printf(MSG_DEBUG, "DATA");
209 handle_data(drv, buf, data_len, stype);
210 break;
211 default:
212 wpa_printf(MSG_DEBUG, "unknown frame type %d", type);
213 break;
214 }
215 }
216
217
218 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
219 {
220 struct hostap_driver_data *drv = eloop_ctx;
221 int len;
222 unsigned char buf[3000];
223
224 len = recv(sock, buf, sizeof(buf), 0);
225 if (len < 0) {
226 perror("recv");
227 return;
228 }
229
230 handle_frame(drv, buf, len);
231 }
232
233
234 static int hostap_init_sockets(struct hostap_driver_data *drv, u8 *own_addr)
235 {
236 struct ifreq ifr;
237 struct sockaddr_ll addr;
238
239 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
240 if (drv->sock < 0) {
241 perror("socket[PF_PACKET,SOCK_RAW]");
242 return -1;
243 }
244
245 if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) {
246 printf("Could not register read socket\n");
247 return -1;
248 }
249
250 memset(&ifr, 0, sizeof(ifr));
251 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", drv->iface);
252 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
253 perror("ioctl(SIOCGIFINDEX)");
254 return -1;
255 }
256
257 if (hostap_set_iface_flags(drv, 1)) {
258 return -1;
259 }
260
261 memset(&addr, 0, sizeof(addr));
262 addr.sll_family = AF_PACKET;
263 addr.sll_ifindex = ifr.ifr_ifindex;
264 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
265 addr.sll_ifindex);
266
267 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
268 perror("bind");
269 return -1;
270 }
271
272 memset(&ifr, 0, sizeof(ifr));
273 os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
274 if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
275 perror("ioctl(SIOCGIFHWADDR)");
276 return -1;
277 }
278
279 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
280 printf("Invalid HW-addr family 0x%04x\n",
281 ifr.ifr_hwaddr.sa_family);
282 return -1;
283 }
284 os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
285
286 return 0;
287 }
288
289
290 static int hostap_send_mlme(void *priv, const u8 *msg, size_t len)
291 {
292 struct hostap_driver_data *drv = priv;
293 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg;
294 int res;
295
296 /* Request TX callback */
297 hdr->frame_control |= host_to_le16(BIT(1));
298 res = send(drv->sock, msg, len, 0);
299 hdr->frame_control &= ~host_to_le16(BIT(1));
300
301 return res;
302 }
303
304
305 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data,
306 size_t data_len, int encrypt, const u8 *own_addr)
307 {
308 struct hostap_driver_data *drv = priv;
309 struct ieee80211_hdr *hdr;
310 size_t len;
311 u8 *pos;
312 int res;
313
314 len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len;
315 hdr = os_zalloc(len);
316 if (hdr == NULL) {
317 printf("malloc() failed for hostapd_send_data(len=%lu)\n",
318 (unsigned long) len);
319 return -1;
320 }
321
322 hdr->frame_control =
323 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
324 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
325 if (encrypt)
326 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
327 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
328 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
329 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
330
331 pos = (u8 *) (hdr + 1);
332 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
333 pos += sizeof(rfc1042_header);
334 *((u16 *) pos) = htons(ETH_P_PAE);
335 pos += 2;
336 memcpy(pos, data, data_len);
337
338 res = hostap_send_mlme(drv, (u8 *) hdr, len);
339 if (res < 0) {
340 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - "
341 "failed: %d (%s)",
342 (unsigned long) len, errno, strerror(errno));
343 }
344 free(hdr);
345
346 return res;
347 }
348
349
350 static int hostap_sta_set_flags(void *priv, const u8 *addr,
351 int total_flags, int flags_or, int flags_and)
352 {
353 struct hostap_driver_data *drv = priv;
354 struct prism2_hostapd_param param;
355
356 if (flags_or & WPA_STA_AUTHORIZED)
357 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */
358 if (!(flags_and & WPA_STA_AUTHORIZED))
359 flags_and = ~BIT(5);
360 else
361 flags_and = ~0;
362 memset(&param, 0, sizeof(param));
363 param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA;
364 memcpy(param.sta_addr, addr, ETH_ALEN);
365 param.u.set_flags_sta.flags_or = flags_or;
366 param.u.set_flags_sta.flags_and = flags_and;
367 return hostapd_ioctl(drv, &param, sizeof(param));
368 }
369
370
371 static int hostap_set_iface_flags(void *priv, int dev_up)
372 {
373 struct hostap_driver_data *drv = priv;
374 struct ifreq ifr;
375 char ifname[IFNAMSIZ];
376
377 os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface);
378 if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0)
379 return -1;
380
381 if (dev_up) {
382 memset(&ifr, 0, sizeof(ifr));
383 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
384 ifr.ifr_mtu = HOSTAPD_MTU;
385 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
386 perror("ioctl[SIOCSIFMTU]");
387 printf("Setting MTU failed - trying to survive with "
388 "current value\n");
389 }
390 }
391
392 return 0;
393 }
394
395
396 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
397 int len)
398 {
399 struct hostap_driver_data *drv = priv;
400 struct iwreq iwr;
401
402 memset(&iwr, 0, sizeof(iwr));
403 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
404 iwr.u.data.pointer = (caddr_t) param;
405 iwr.u.data.length = len;
406
407 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
408 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
409 return -1;
410 }
411
412 return 0;
413 }
414
415
416 static int wpa_driver_hostap_set_key(const char *ifname, void *priv,
417 enum wpa_alg alg, const u8 *addr,
418 int key_idx, int set_tx,
419 const u8 *seq, size_t seq_len,
420 const u8 *key, size_t key_len)
421 {
422 struct hostap_driver_data *drv = priv;
423 struct prism2_hostapd_param *param;
424 u8 *buf;
425 size_t blen;
426 int ret = 0;
427
428 blen = sizeof(*param) + key_len;
429 buf = os_zalloc(blen);
430 if (buf == NULL)
431 return -1;
432
433 param = (struct prism2_hostapd_param *) buf;
434 param->cmd = PRISM2_SET_ENCRYPTION;
435 if (addr == NULL)
436 memset(param->sta_addr, 0xff, ETH_ALEN);
437 else
438 memcpy(param->sta_addr, addr, ETH_ALEN);
439 switch (alg) {
440 case WPA_ALG_NONE:
441 os_strlcpy((char *) param->u.crypt.alg, "NONE",
442 HOSTAP_CRYPT_ALG_NAME_LEN);
443 break;
444 case WPA_ALG_WEP:
445 os_strlcpy((char *) param->u.crypt.alg, "WEP",
446 HOSTAP_CRYPT_ALG_NAME_LEN);
447 break;
448 case WPA_ALG_TKIP:
449 os_strlcpy((char *) param->u.crypt.alg, "TKIP",
450 HOSTAP_CRYPT_ALG_NAME_LEN);
451 break;
452 case WPA_ALG_CCMP:
453 os_strlcpy((char *) param->u.crypt.alg, "CCMP",
454 HOSTAP_CRYPT_ALG_NAME_LEN);
455 break;
456 default:
457 os_free(buf);
458 return -1;
459 }
460 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
461 param->u.crypt.idx = key_idx;
462 param->u.crypt.key_len = key_len;
463 memcpy((u8 *) (param + 1), key, key_len);
464
465 if (hostapd_ioctl(drv, param, blen)) {
466 printf("Failed to set encryption.\n");
467 ret = -1;
468 }
469 free(buf);
470
471 return ret;
472 }
473
474
475 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr,
476 int idx, u8 *seq)
477 {
478 struct hostap_driver_data *drv = priv;
479 struct prism2_hostapd_param *param;
480 u8 *buf;
481 size_t blen;
482 int ret = 0;
483
484 blen = sizeof(*param) + 32;
485 buf = os_zalloc(blen);
486 if (buf == NULL)
487 return -1;
488
489 param = (struct prism2_hostapd_param *) buf;
490 param->cmd = PRISM2_GET_ENCRYPTION;
491 if (addr == NULL)
492 memset(param->sta_addr, 0xff, ETH_ALEN);
493 else
494 memcpy(param->sta_addr, addr, ETH_ALEN);
495 param->u.crypt.idx = idx;
496
497 if (hostapd_ioctl(drv, param, blen)) {
498 printf("Failed to get encryption.\n");
499 ret = -1;
500 } else {
501 memcpy(seq, param->u.crypt.seq, 8);
502 }
503 free(buf);
504
505 return ret;
506 }
507
508
509 static int hostap_ioctl_prism2param(void *priv, int param, int value)
510 {
511 struct hostap_driver_data *drv = priv;
512 struct iwreq iwr;
513 int *i;
514
515 memset(&iwr, 0, sizeof(iwr));
516 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
517 i = (int *) iwr.u.name;
518 *i++ = param;
519 *i++ = value;
520
521 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
522 perror("ioctl[PRISM2_IOCTL_PRISM2_PARAM]");
523 return -1;
524 }
525
526 return 0;
527 }
528
529
530 static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params)
531 {
532 struct hostap_driver_data *drv = priv;
533 int enabled = params->enabled;
534
535 /* enable kernel driver support for IEEE 802.1X */
536 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) {
537 printf("Could not setup IEEE 802.1X support in kernel driver."
538 "\n");
539 return -1;
540 }
541
542 if (!enabled)
543 return 0;
544
545 /* use host driver implementation of encryption to allow
546 * individual keys and passing plaintext EAPOL frames */
547 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) ||
548 hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) {
549 printf("Could not setup host-based encryption in kernel "
550 "driver.\n");
551 return -1;
552 }
553
554 return 0;
555 }
556
557
558 static int hostap_set_privacy(const char *ifname, void *priv, int enabled)
559 {
560 struct hostap_drvier_data *drv = priv;
561
562 return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
563 enabled);
564 }
565
566
567 static int hostap_set_ssid(const char *ifname, void *priv, const u8 *buf,
568 int len)
569 {
570 struct hostap_driver_data *drv = priv;
571 struct iwreq iwr;
572
573 memset(&iwr, 0, sizeof(iwr));
574 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
575 iwr.u.essid.flags = 1; /* SSID active */
576 iwr.u.essid.pointer = (caddr_t) buf;
577 iwr.u.essid.length = len + 1;
578
579 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
580 perror("ioctl[SIOCSIWESSID]");
581 printf("len=%d\n", len);
582 return -1;
583 }
584
585 return 0;
586 }
587
588
589 static int hostap_flush(void *priv)
590 {
591 struct hostap_driver_data *drv = priv;
592 struct prism2_hostapd_param param;
593
594 memset(&param, 0, sizeof(param));
595 param.cmd = PRISM2_HOSTAPD_FLUSH;
596 return hostapd_ioctl(drv, &param, sizeof(param));
597 }
598
599
600 static int hostap_read_sta_data(void *priv,
601 struct hostap_sta_driver_data *data,
602 const u8 *addr)
603 {
604 struct hostap_driver_data *drv = priv;
605 char buf[1024], line[128], *pos;
606 FILE *f;
607 unsigned long val;
608
609 memset(data, 0, sizeof(*data));
610 snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR,
611 drv->iface, MAC2STR(addr));
612
613 f = fopen(buf, "r");
614 if (!f)
615 return -1;
616 /* Need to read proc file with in one piece, so use large enough
617 * buffer. */
618 setbuffer(f, buf, sizeof(buf));
619
620 while (fgets(line, sizeof(line), f)) {
621 pos = strchr(line, '=');
622 if (!pos)
623 continue;
624 *pos++ = '\0';
625 val = strtoul(pos, NULL, 10);
626 if (strcmp(line, "rx_packets") == 0)
627 data->rx_packets = val;
628 else if (strcmp(line, "tx_packets") == 0)
629 data->tx_packets = val;
630 else if (strcmp(line, "rx_bytes") == 0)
631 data->rx_bytes = val;
632 else if (strcmp(line, "tx_bytes") == 0)
633 data->tx_bytes = val;
634 }
635
636 fclose(f);
637
638 return 0;
639 }
640
641
642 static int hostap_sta_add(const char *ifname, void *priv,
643 struct hostapd_sta_add_params *params)
644 {
645 struct hostap_driver_data *drv = priv;
646 struct prism2_hostapd_param param;
647 int tx_supp_rates = 0;
648 size_t i;
649
650 #define WLAN_RATE_1M BIT(0)
651 #define WLAN_RATE_2M BIT(1)
652 #define WLAN_RATE_5M5 BIT(2)
653 #define WLAN_RATE_11M BIT(3)
654
655 for (i = 0; i < params->supp_rates_len; i++) {
656 if ((params->supp_rates[i] & 0x7f) == 2)
657 tx_supp_rates |= WLAN_RATE_1M;
658 if ((params->supp_rates[i] & 0x7f) == 4)
659 tx_supp_rates |= WLAN_RATE_2M;
660 if ((params->supp_rates[i] & 0x7f) == 11)
661 tx_supp_rates |= WLAN_RATE_5M5;
662 if ((params->supp_rates[i] & 0x7f) == 22)
663 tx_supp_rates |= WLAN_RATE_11M;
664 }
665
666 memset(&param, 0, sizeof(param));
667 param.cmd = PRISM2_HOSTAPD_ADD_STA;
668 memcpy(param.sta_addr, params->addr, ETH_ALEN);
669 param.u.add_sta.aid = params->aid;
670 param.u.add_sta.capability = params->capability;
671 param.u.add_sta.tx_supp_rates = tx_supp_rates;
672 return hostapd_ioctl(drv, &param, sizeof(param));
673 }
674
675
676 static int hostap_sta_remove(void *priv, const u8 *addr)
677 {
678 struct hostap_driver_data *drv = priv;
679 struct prism2_hostapd_param param;
680
681 hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED);
682
683 memset(&param, 0, sizeof(param));
684 param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
685 memcpy(param.sta_addr, addr, ETH_ALEN);
686 if (hostapd_ioctl(drv, &param, sizeof(param))) {
687 printf("Could not remove station from kernel driver.\n");
688 return -1;
689 }
690 return 0;
691 }
692
693
694 static int hostap_get_inact_sec(void *priv, const u8 *addr)
695 {
696 struct hostap_driver_data *drv = priv;
697 struct prism2_hostapd_param param;
698
699 memset(&param, 0, sizeof(param));
700 param.cmd = PRISM2_HOSTAPD_GET_INFO_STA;
701 memcpy(param.sta_addr, addr, ETH_ALEN);
702 if (hostapd_ioctl(drv, &param, sizeof(param))) {
703 return -1;
704 }
705
706 return param.u.get_info_sta.inactive_sec;
707 }
708
709
710 static int hostap_sta_clear_stats(void *priv, const u8 *addr)
711 {
712 struct hostap_driver_data *drv = priv;
713 struct prism2_hostapd_param param;
714
715 memset(&param, 0, sizeof(param));
716 param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS;
717 memcpy(param.sta_addr, addr, ETH_ALEN);
718 if (hostapd_ioctl(drv, &param, sizeof(param))) {
719 return -1;
720 }
721
722 return 0;
723 }
724
725
726 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv)
727 {
728 struct prism2_hostapd_param *param;
729 int res;
730 size_t blen, elem_len;
731
732 elem_len = drv->generic_ie_len + drv->wps_ie_len;
733 blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len;
734 if (blen < sizeof(*param))
735 blen = sizeof(*param);
736
737 param = os_zalloc(blen);
738 if (param == NULL)
739 return -1;
740
741 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
742 param->u.generic_elem.len = elem_len;
743 if (drv->generic_ie) {
744 os_memcpy(param->u.generic_elem.data, drv->generic_ie,
745 drv->generic_ie_len);
746 }
747 if (drv->wps_ie) {
748 os_memcpy(&param->u.generic_elem.data[drv->generic_ie_len],
749 drv->wps_ie, drv->wps_ie_len);
750 }
751 wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE",
752 param->u.generic_elem.data, elem_len);
753 res = hostapd_ioctl(drv, param, blen);
754
755 os_free(param);
756
757 return res;
758 }
759
760
761 static int hostap_set_generic_elem(const char *ifname, void *priv,
762 const u8 *elem, size_t elem_len)
763 {
764 struct hostap_driver_data *drv = priv;
765
766 os_free(drv->generic_ie);
767 drv->generic_ie = NULL;
768 drv->generic_ie_len = 0;
769 if (elem) {
770 drv->generic_ie = os_malloc(elem_len);
771 if (drv->generic_ie == NULL)
772 return -1;
773 os_memcpy(drv->generic_ie, elem, elem_len);
774 drv->generic_ie_len = elem_len;
775 }
776
777 return hostapd_ioctl_set_generic_elem(drv);
778 }
779
780
781 static int hostap_set_ap_wps_ie(const char *ifname, void *priv,
782 const struct wpabuf *beacon,
783 const struct wpabuf *proberesp)
784 {
785 struct hostap_driver_data *drv = priv;
786
787 /*
788 * Host AP driver supports only one set of extra IEs, so we need to
789 * use the Probe Response IEs also for Beacon frames since they include
790 * more information.
791 */
792
793 os_free(drv->wps_ie);
794 drv->wps_ie = NULL;
795 drv->wps_ie_len = 0;
796 if (proberesp) {
797 drv->wps_ie = os_malloc(wpabuf_len(proberesp));
798 if (drv->wps_ie == NULL)
799 return -1;
800 os_memcpy(drv->wps_ie, wpabuf_head(proberesp),
801 wpabuf_len(proberesp));
802 drv->wps_ie_len = wpabuf_len(proberesp);
803 }
804
805 return hostapd_ioctl_set_generic_elem(drv);
806 }
807
808
809 static void
810 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv,
811 char *custom)
812 {
813 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
814
815 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
816 char *pos;
817 u8 addr[ETH_ALEN];
818 pos = strstr(custom, "addr=");
819 if (pos == NULL) {
820 wpa_printf(MSG_DEBUG,
821 "MLME-MICHAELMICFAILURE.indication "
822 "without sender address ignored");
823 return;
824 }
825 pos += 5;
826 if (hwaddr_aton(pos, addr) == 0) {
827 union wpa_event_data data;
828 os_memset(&data, 0, sizeof(data));
829 data.michael_mic_failure.unicast = 1;
830 data.michael_mic_failure.src = addr;
831 wpa_supplicant_event(drv->hapd,
832 EVENT_MICHAEL_MIC_FAILURE, &data);
833 } else {
834 wpa_printf(MSG_DEBUG,
835 "MLME-MICHAELMICFAILURE.indication "
836 "with invalid MAC address");
837 }
838 }
839 }
840
841
842 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv,
843 char *data, int len)
844 {
845 struct iw_event iwe_buf, *iwe = &iwe_buf;
846 char *pos, *end, *custom, *buf;
847
848 pos = data;
849 end = data + len;
850
851 while (pos + IW_EV_LCP_LEN <= end) {
852 /* Event data may be unaligned, so make a local, aligned copy
853 * before processing. */
854 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
855 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
856 iwe->cmd, iwe->len);
857 if (iwe->len <= IW_EV_LCP_LEN)
858 return;
859
860 custom = pos + IW_EV_POINT_LEN;
861 if (drv->we_version > 18 &&
862 (iwe->cmd == IWEVMICHAELMICFAILURE ||
863 iwe->cmd == IWEVCUSTOM)) {
864 /* WE-19 removed the pointer from struct iw_point */
865 char *dpos = (char *) &iwe_buf.u.data.length;
866 int dlen = dpos - (char *) &iwe_buf;
867 memcpy(dpos, pos + IW_EV_LCP_LEN,
868 sizeof(struct iw_event) - dlen);
869 } else {
870 memcpy(&iwe_buf, pos, sizeof(struct iw_event));
871 custom += IW_EV_POINT_OFF;
872 }
873
874 switch (iwe->cmd) {
875 case IWEVCUSTOM:
876 if (custom + iwe->u.data.length > end)
877 return;
878 buf = malloc(iwe->u.data.length + 1);
879 if (buf == NULL)
880 return;
881 memcpy(buf, custom, iwe->u.data.length);
882 buf[iwe->u.data.length] = '\0';
883 hostapd_wireless_event_wireless_custom(drv, buf);
884 free(buf);
885 break;
886 }
887
888 pos += iwe->len;
889 }
890 }
891
892
893 static void hostapd_wireless_event_rtm_newlink(void *ctx,
894 struct ifinfomsg *ifi,
895 u8 *buf, size_t len)
896 {
897 struct hostap_driver_data *drv = ctx;
898 int attrlen, rta_len;
899 struct rtattr *attr;
900
901 /* TODO: use ifi->ifi_index to filter out wireless events from other
902 * interfaces */
903
904 attrlen = len;
905 attr = (struct rtattr *) buf;
906
907 rta_len = RTA_ALIGN(sizeof(struct rtattr));
908 while (RTA_OK(attr, attrlen)) {
909 if (attr->rta_type == IFLA_WIRELESS) {
910 hostapd_wireless_event_wireless(
911 drv, ((char *) attr) + rta_len,
912 attr->rta_len - rta_len);
913 }
914 attr = RTA_NEXT(attr, attrlen);
915 }
916 }
917
918
919 static int hostap_get_we_version(struct hostap_driver_data *drv)
920 {
921 struct iw_range *range;
922 struct iwreq iwr;
923 int minlen;
924 size_t buflen;
925
926 drv->we_version = 0;
927
928 /*
929 * Use larger buffer than struct iw_range in order to allow the
930 * structure to grow in the future.
931 */
932 buflen = sizeof(struct iw_range) + 500;
933 range = os_zalloc(buflen);
934 if (range == NULL)
935 return -1;
936
937 memset(&iwr, 0, sizeof(iwr));
938 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
939 iwr.u.data.pointer = (caddr_t) range;
940 iwr.u.data.length = buflen;
941
942 minlen = ((char *) &range->enc_capa) - (char *) range +
943 sizeof(range->enc_capa);
944
945 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
946 perror("ioctl[SIOCGIWRANGE]");
947 free(range);
948 return -1;
949 } else if (iwr.u.data.length >= minlen &&
950 range->we_version_compiled >= 18) {
951 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
952 "WE(source)=%d enc_capa=0x%x",
953 range->we_version_compiled,
954 range->we_version_source,
955 range->enc_capa);
956 drv->we_version = range->we_version_compiled;
957 }
958
959 free(range);
960 return 0;
961 }
962
963
964 static int hostap_wireless_event_init(struct hostap_driver_data *drv)
965 {
966 struct netlink_config *cfg;
967
968 hostap_get_we_version(drv);
969
970 cfg = os_zalloc(sizeof(*cfg));
971 if (cfg == NULL)
972 return -1;
973 cfg->ctx = drv;
974 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink;
975 drv->netlink = netlink_init(cfg);
976 if (drv->netlink == NULL) {
977 os_free(cfg);
978 return -1;
979 }
980
981 return 0;
982 }
983
984
985 static void * hostap_init(struct hostapd_data *hapd,
986 struct wpa_init_params *params)
987 {
988 struct hostap_driver_data *drv;
989
990 drv = os_zalloc(sizeof(struct hostap_driver_data));
991 if (drv == NULL) {
992 printf("Could not allocate memory for hostapd driver data\n");
993 return NULL;
994 }
995
996 drv->hapd = hapd;
997 drv->ioctl_sock = drv->sock = -1;
998 memcpy(drv->iface, params->ifname, sizeof(drv->iface));
999
1000 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1001 if (drv->ioctl_sock < 0) {
1002 perror("socket[PF_INET,SOCK_DGRAM]");
1003 free(drv);
1004 return NULL;
1005 }
1006
1007 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) {
1008 printf("Could not enable hostapd mode for interface %s\n",
1009 drv->iface);
1010 close(drv->ioctl_sock);
1011 free(drv);
1012 return NULL;
1013 }
1014
1015 if (hostap_init_sockets(drv, params->own_addr) ||
1016 hostap_wireless_event_init(drv)) {
1017 close(drv->ioctl_sock);
1018 free(drv);
1019 return NULL;
1020 }
1021
1022 return drv;
1023 }
1024
1025
1026 static void hostap_driver_deinit(void *priv)
1027 {
1028 struct hostap_driver_data *drv = priv;
1029
1030 netlink_deinit(drv->netlink);
1031 (void) hostap_set_iface_flags(drv, 0);
1032 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0);
1033 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0);
1034
1035 if (drv->ioctl_sock >= 0)
1036 close(drv->ioctl_sock);
1037
1038 if (drv->sock >= 0)
1039 close(drv->sock);
1040
1041 os_free(drv->generic_ie);
1042 os_free(drv->wps_ie);
1043
1044 free(drv);
1045 }
1046
1047
1048 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
1049 int reason)
1050 {
1051 struct hostap_driver_data *drv = priv;
1052 struct ieee80211_mgmt mgmt;
1053
1054 memset(&mgmt, 0, sizeof(mgmt));
1055 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1056 WLAN_FC_STYPE_DEAUTH);
1057 memcpy(mgmt.da, addr, ETH_ALEN);
1058 memcpy(mgmt.sa, own_addr, ETH_ALEN);
1059 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
1060 mgmt.u.deauth.reason_code = host_to_le16(reason);
1061 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN +
1062 sizeof(mgmt.u.deauth));
1063 }
1064
1065
1066 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
1067 int reason)
1068 {
1069 struct hostap_driver_data *drv = priv;
1070 struct ieee80211_mgmt mgmt;
1071
1072 memset(&mgmt, 0, sizeof(mgmt));
1073 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1074 WLAN_FC_STYPE_DISASSOC);
1075 memcpy(mgmt.da, addr, ETH_ALEN);
1076 memcpy(mgmt.sa, own_addr, ETH_ALEN);
1077 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
1078 mgmt.u.disassoc.reason_code = host_to_le16(reason);
1079 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN +
1080 sizeof(mgmt.u.disassoc));
1081 }
1082
1083
1084 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv,
1085 u16 *num_modes,
1086 u16 *flags)
1087 {
1088 struct hostapd_hw_modes *mode;
1089 int i, clen, rlen;
1090 const short chan2freq[14] = {
1091 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1092 2447, 2452, 2457, 2462, 2467, 2472, 2484
1093 };
1094
1095 mode = os_zalloc(sizeof(struct hostapd_hw_modes));
1096 if (mode == NULL)
1097 return NULL;
1098
1099 *num_modes = 1;
1100 *flags = 0;
1101
1102 mode->mode = HOSTAPD_MODE_IEEE80211B;
1103 mode->num_channels = 14;
1104 mode->num_rates = 4;
1105
1106 clen = mode->num_channels * sizeof(struct hostapd_channel_data);
1107 rlen = mode->num_rates * sizeof(int);
1108
1109 mode->channels = os_zalloc(clen);
1110 mode->rates = os_zalloc(rlen);
1111 if (mode->channels == NULL || mode->rates == NULL) {
1112 os_free(mode->channels);
1113 os_free(mode->rates);
1114 os_free(mode);
1115 return NULL;
1116 }
1117
1118 for (i = 0; i < 14; i++) {
1119 mode->channels[i].chan = i + 1;
1120 mode->channels[i].freq = chan2freq[i];
1121 /* TODO: Get allowed channel list from the driver */
1122 if (i >= 11)
1123 mode->channels[i].flag = HOSTAPD_CHAN_DISABLED;
1124 }
1125
1126 mode->rates[0] = 10;
1127 mode->rates[1] = 20;
1128 mode->rates[2] = 55;
1129 mode->rates[3] = 110;
1130
1131 return mode;
1132 }
1133
1134 #else /* HOSTAPD */
1135
1136 struct wpa_driver_hostap_data {
1137 void *wext; /* private data for driver_wext */
1138 void *ctx;
1139 char ifname[IFNAMSIZ + 1];
1140 int sock;
1141 int current_mode; /* infra/adhoc */
1142 };
1143
1144
1145 static int wpa_driver_hostap_set_auth_alg(void *priv, int auth_alg);
1146
1147
1148 static int hostapd_ioctl(struct wpa_driver_hostap_data *drv,
1149 struct prism2_hostapd_param *param,
1150 int len, int show_err)
1151 {
1152 struct iwreq iwr;
1153
1154 os_memset(&iwr, 0, sizeof(iwr));
1155 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1156 iwr.u.data.pointer = (caddr_t) param;
1157 iwr.u.data.length = len;
1158
1159 if (ioctl(drv->sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
1160 int ret = errno;
1161 if (show_err)
1162 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
1163 return ret;
1164 }
1165
1166 return 0;
1167 }
1168
1169
1170 static int wpa_driver_hostap_set_wpa_ie(struct wpa_driver_hostap_data *drv,
1171 const u8 *wpa_ie, size_t wpa_ie_len)
1172 {
1173 struct prism2_hostapd_param *param;
1174 int res;
1175 size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
1176 if (blen < sizeof(*param))
1177 blen = sizeof(*param);
1178
1179 param = os_zalloc(blen);
1180 if (param == NULL)
1181 return -1;
1182
1183 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
1184 param->u.generic_elem.len = wpa_ie_len;
1185 os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
1186 res = hostapd_ioctl(drv, param, blen, 1);
1187
1188 os_free(param);
1189
1190 return res;
1191 }
1192
1193
1194 static int prism2param(struct wpa_driver_hostap_data *drv, int param,
1195 int value)
1196 {
1197 struct iwreq iwr;
1198 int *i, ret = 0;
1199
1200 os_memset(&iwr, 0, sizeof(iwr));
1201 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1202 i = (int *) iwr.u.name;
1203 *i++ = param;
1204 *i++ = value;
1205
1206 if (ioctl(drv->sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
1207 perror("ioctl[PRISM2_IOCTL_PRISM2_PARAM]");
1208 ret = -1;
1209 }
1210 return ret;
1211 }
1212
1213
1214 static int wpa_driver_hostap_set_wpa(void *priv, int enabled)
1215 {
1216 struct wpa_driver_hostap_data *drv = priv;
1217 int ret = 0;
1218
1219 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
1220
1221 if (!enabled && wpa_driver_hostap_set_wpa_ie(drv, NULL, 0) < 0)
1222 ret = -1;
1223 if (prism2param(drv, PRISM2_PARAM_HOST_ROAMING, enabled ? 2 : 0) < 0)
1224 ret = -1;
1225 if (prism2param(drv, PRISM2_PARAM_WPA, enabled) < 0)
1226 ret = -1;
1227
1228 return ret;
1229 }
1230
1231
1232 static void show_set_key_error(struct prism2_hostapd_param *param)
1233 {
1234 switch (param->u.crypt.err) {
1235 case HOSTAP_CRYPT_ERR_UNKNOWN_ALG:
1236 wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
1237 param->u.crypt.alg);
1238 wpa_printf(MSG_INFO, "You may need to load kernel module to "
1239 "register that algorithm.");
1240 wpa_printf(MSG_INFO, "E.g., 'modprobe hostap_crypt_wep' for "
1241 "WEP.");
1242 break;
1243 case HOSTAP_CRYPT_ERR_UNKNOWN_ADDR:
1244 wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
1245 MAC2STR(param->sta_addr));
1246 break;
1247 case HOSTAP_CRYPT_ERR_CRYPT_INIT_FAILED:
1248 wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
1249 break;
1250 case HOSTAP_CRYPT_ERR_KEY_SET_FAILED:
1251 wpa_printf(MSG_INFO, "Key setting failed.");
1252 break;
1253 case HOSTAP_CRYPT_ERR_TX_KEY_SET_FAILED:
1254 wpa_printf(MSG_INFO, "TX key index setting failed.");
1255 break;
1256 case HOSTAP_CRYPT_ERR_CARD_CONF_FAILED:
1257 wpa_printf(MSG_INFO, "Card configuration failed.");
1258 break;
1259 }
1260 }
1261
1262
1263 static int wpa_driver_hostap_set_key(const char *ifname, void *priv,
1264 enum wpa_alg alg, const u8 *addr,
1265 int key_idx, int set_tx,
1266 const u8 *seq, size_t seq_len,
1267 const u8 *key, size_t key_len)
1268 {
1269 struct wpa_driver_hostap_data *drv = priv;
1270 struct prism2_hostapd_param *param;
1271 u8 *buf;
1272 size_t blen;
1273 int ret = 0;
1274 char *alg_name;
1275
1276 switch (alg) {
1277 case WPA_ALG_NONE:
1278 alg_name = "none";
1279 break;
1280 case WPA_ALG_WEP:
1281 alg_name = "WEP";
1282 break;
1283 case WPA_ALG_TKIP:
1284 alg_name = "TKIP";
1285 break;
1286 case WPA_ALG_CCMP:
1287 alg_name = "CCMP";
1288 break;
1289 default:
1290 return -1;
1291 }
1292
1293 wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
1294 "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
1295 (unsigned long) seq_len, (unsigned long) key_len);
1296
1297 if (seq_len > 8)
1298 return -2;
1299
1300 blen = sizeof(*param) + key_len;
1301 buf = os_zalloc(blen);
1302 if (buf == NULL)
1303 return -1;
1304
1305 param = (struct prism2_hostapd_param *) buf;
1306 param->cmd = PRISM2_SET_ENCRYPTION;
1307 /* TODO: In theory, STA in client mode can use five keys; four default
1308 * keys for receiving (with keyidx 0..3) and one individual key for
1309 * both transmitting and receiving (keyidx 0) _unicast_ packets. Now,
1310 * keyidx 0 is reserved for this unicast use and default keys can only
1311 * use keyidx 1..3 (i.e., default key with keyidx 0 is not supported).
1312 * This should be fine for more or less all cases, but for completeness
1313 * sake, the driver could be enhanced to support the missing key. */
1314 #if 0
1315 if (addr == NULL)
1316 os_memset(param->sta_addr, 0xff, ETH_ALEN);
1317 else
1318 os_memcpy(param->sta_addr, addr, ETH_ALEN);
1319 #else
1320 os_memset(param->sta_addr, 0xff, ETH_ALEN);
1321 #endif
1322 os_strlcpy((char *) param->u.crypt.alg, alg_name,
1323 HOSTAP_CRYPT_ALG_NAME_LEN);
1324 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
1325 param->u.crypt.idx = key_idx;
1326 os_memcpy(param->u.crypt.seq, seq, seq_len);
1327 param->u.crypt.key_len = key_len;
1328 os_memcpy((u8 *) (param + 1), key, key_len);
1329
1330 if (hostapd_ioctl(drv, param, blen, 1)) {
1331 wpa_printf(MSG_WARNING, "Failed to set encryption.");
1332 show_set_key_error(param);
1333 ret = -1;
1334 }
1335 os_free(buf);
1336
1337 return ret;
1338 }
1339
1340
1341 static int wpa_driver_hostap_set_countermeasures(void *priv, int enabled)
1342 {
1343 struct wpa_driver_hostap_data *drv = priv;
1344 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
1345 return prism2param(drv, PRISM2_PARAM_TKIP_COUNTERMEASURES, enabled);
1346 }
1347
1348
1349 static int wpa_driver_hostap_reset(struct wpa_driver_hostap_data *drv,
1350 int type)
1351 {
1352 struct iwreq iwr;
1353 int *i, ret = 0;
1354
1355 wpa_printf(MSG_DEBUG, "%s: type=%d", __FUNCTION__, type);
1356
1357 os_memset(&iwr, 0, sizeof(iwr));
1358 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1359 i = (int *) iwr.u.name;
1360 *i++ = type;
1361
1362 if (ioctl(drv->sock, PRISM2_IOCTL_RESET, &iwr) < 0) {
1363 perror("ioctl[PRISM2_IOCTL_RESET]");
1364 ret = -1;
1365 }
1366 return ret;
1367 }
1368
1369
1370 static int wpa_driver_hostap_mlme(struct wpa_driver_hostap_data *drv,
1371 const u8 *addr, int cmd, int reason_code)
1372 {
1373 struct prism2_hostapd_param param;
1374 int ret;
1375
1376 /* There does not seem to be a better way of deauthenticating or
1377 * disassociating with Prism2/2.5/3 than sending the management frame
1378 * and then resetting the Port0 to make sure both the AP and the STA
1379 * end up in disconnected state. */
1380 os_memset(&param, 0, sizeof(param));
1381 param.cmd = PRISM2_HOSTAPD_MLME;
1382 os_memcpy(param.sta_addr, addr, ETH_ALEN);
1383 param.u.mlme.cmd = cmd;
1384 param.u.mlme.reason_code = reason_code;
1385 ret = hostapd_ioctl(drv, &param, sizeof(param), 1);
1386 if (ret == 0) {
1387 os_sleep(0, 100000);
1388 ret = wpa_driver_hostap_reset(drv, 2);
1389 }
1390 return ret;
1391 }
1392
1393
1394 static int wpa_driver_hostap_deauthenticate(void *priv, const u8 *addr,
1395 int reason_code)
1396 {
1397 struct wpa_driver_hostap_data *drv = priv;
1398 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1399 return wpa_driver_hostap_mlme(drv, addr, MLME_STA_DEAUTH,
1400 reason_code);
1401 }
1402
1403
1404 static int wpa_driver_hostap_disassociate(void *priv, const u8 *addr,
1405 int reason_code)
1406 {
1407 struct wpa_driver_hostap_data *drv = priv;
1408 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1409 return wpa_driver_hostap_mlme(drv, addr, MLME_STA_DISASSOC,
1410 reason_code);
1411 }
1412
1413
1414 static int
1415 wpa_driver_hostap_associate(void *priv,
1416 struct wpa_driver_associate_params *params)
1417 {
1418 struct wpa_driver_hostap_data *drv = priv;
1419 int ret = 0;
1420 int allow_unencrypted_eapol;
1421
1422 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1423
1424 if (prism2param(drv, PRISM2_PARAM_DROP_UNENCRYPTED,
1425 params->drop_unencrypted) < 0)
1426 ret = -1;
1427 if (wpa_driver_hostap_set_auth_alg(drv, params->auth_alg) < 0)
1428 ret = -1;
1429 if (params->mode != drv->current_mode) {
1430 /* At the moment, Host AP driver requires host_roaming=2 for
1431 * infrastructure mode and host_roaming=0 for adhoc. */
1432 if (prism2param(drv, PRISM2_PARAM_HOST_ROAMING,
1433 params->mode == IEEE80211_MODE_IBSS ? 0 : 2) <
1434 0) {
1435 wpa_printf(MSG_DEBUG, "%s: failed to set host_roaming",
1436 __func__);
1437 }
1438 drv->current_mode = params->mode;
1439 }
1440
1441 if (prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
1442 params->key_mgmt_suite != KEY_MGMT_NONE) < 0)
1443 ret = -1;
1444 if (wpa_driver_hostap_set_wpa_ie(drv, params->wpa_ie,
1445 params->wpa_ie_len) < 0)
1446 ret = -1;
1447 if (wpa_driver_wext_set_mode(drv->wext, params->mode) < 0)
1448 ret = -1;
1449 if (params->freq &&
1450 wpa_driver_wext_set_freq(drv->wext, params->freq) < 0)
1451 ret = -1;
1452 if (wpa_driver_wext_set_ssid(drv->wext, params->ssid, params->ssid_len)
1453 < 0)
1454 ret = -1;
1455 if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
1456 ret = -1;
1457
1458 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1459 * not using WPA. IEEE 802.1X specifies that these frames are not
1460 * encrypted, but WPA encrypts them when pairwise keys are in use. */
1461 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1462 params->key_mgmt_suite == KEY_MGMT_PSK)
1463 allow_unencrypted_eapol = 0;
1464 else
1465 allow_unencrypted_eapol = 1;
1466
1467 if (prism2param(drv, PRISM2_PARAM_IEEE_802_1X,
1468 allow_unencrypted_eapol) < 0) {
1469 wpa_printf(MSG_DEBUG, "hostap: Failed to configure "
1470 "ieee_802_1x param");
1471 /* Ignore this error.. driver_hostap.c can also be used with
1472 * other drivers that do not support this prism2_param. */
1473 }
1474
1475 return ret;
1476 }
1477
1478
1479 static int wpa_driver_hostap_scan(void *priv,
1480 struct wpa_driver_scan_params *params)
1481 {
1482 struct wpa_driver_hostap_data *drv = priv;
1483 struct prism2_hostapd_param param;
1484 int ret;
1485 const u8 *ssid = params->ssids[0].ssid;
1486 size_t ssid_len = params->ssids[0].ssid_len;
1487
1488 if (ssid == NULL) {
1489 /* Use standard Linux Wireless Extensions ioctl if possible
1490 * because some drivers using hostap code in wpa_supplicant
1491 * might not support Host AP specific scan request (with SSID
1492 * info). */
1493 return wpa_driver_wext_scan(drv->wext, params);
1494 }
1495
1496 if (ssid_len > 32)
1497 ssid_len = 32;
1498
1499 os_memset(&param, 0, sizeof(param));
1500 param.cmd = PRISM2_HOSTAPD_SCAN_REQ;
1501 param.u.scan_req.ssid_len = ssid_len;
1502 os_memcpy(param.u.scan_req.ssid, ssid, ssid_len);
1503 ret = hostapd_ioctl(drv, &param, sizeof(param), 1);
1504
1505 /* Not all drivers generate "scan completed" wireless event, so try to
1506 * read results after a timeout. */
1507 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv->wext,
1508 drv->ctx);
1509 eloop_register_timeout(3, 0, wpa_driver_wext_scan_timeout, drv->wext,
1510 drv->ctx);
1511
1512 return ret;
1513 }
1514
1515
1516 static int wpa_driver_hostap_set_auth_alg(void *priv, int auth_alg)
1517 {
1518 struct wpa_driver_hostap_data *drv = priv;
1519 int algs = 0;
1520
1521 if (auth_alg & WPA_AUTH_ALG_OPEN)
1522 algs |= 1;
1523 if (auth_alg & WPA_AUTH_ALG_SHARED)
1524 algs |= 2;
1525 if (auth_alg & WPA_AUTH_ALG_LEAP)
1526 algs |= 4;
1527 if (algs == 0)
1528 algs = 1; /* at least one algorithm should be set */
1529
1530 return prism2param(drv, PRISM2_PARAM_AP_AUTH_ALGS, algs);
1531 }
1532
1533
1534 static int wpa_driver_hostap_get_bssid(void *priv, u8 *bssid)
1535 {
1536 struct wpa_driver_hostap_data *drv = priv;
1537 return wpa_driver_wext_get_bssid(drv->wext, bssid);
1538 }
1539
1540
1541 static int wpa_driver_hostap_get_ssid(void *priv, u8 *ssid)
1542 {
1543 struct wpa_driver_hostap_data *drv = priv;
1544 return wpa_driver_wext_get_ssid(drv->wext, ssid);
1545 }
1546
1547
1548 static struct wpa_scan_results * wpa_driver_hostap_get_scan_results(void *priv)
1549 {
1550 struct wpa_driver_hostap_data *drv = priv;
1551 return wpa_driver_wext_get_scan_results(drv->wext);
1552 }
1553
1554
1555 static int wpa_driver_hostap_set_operstate(void *priv, int state)
1556 {
1557 struct wpa_driver_hostap_data *drv = priv;
1558 return wpa_driver_wext_set_operstate(drv->wext, state);
1559 }
1560
1561
1562 static void * wpa_driver_hostap_init(void *ctx, const char *ifname)
1563 {
1564 struct wpa_driver_hostap_data *drv;
1565
1566 drv = os_zalloc(sizeof(*drv));
1567 if (drv == NULL)
1568 return NULL;
1569 drv->wext = wpa_driver_wext_init(ctx, ifname);
1570 if (drv->wext == NULL) {
1571 os_free(drv);
1572 return NULL;
1573 }
1574
1575 drv->ctx = ctx;
1576 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1577 drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
1578 if (drv->sock < 0) {
1579 perror("socket");
1580 wpa_driver_wext_deinit(drv->wext);
1581 os_free(drv);
1582 return NULL;
1583 }
1584
1585 if (os_strncmp(ifname, "wlan", 4) == 0) {
1586 /*
1587 * Host AP driver may use both wlan# and wifi# interface in
1588 * wireless events.
1589 */
1590 char ifname2[IFNAMSIZ + 1];
1591 os_strlcpy(ifname2, ifname, sizeof(ifname2));
1592 os_memcpy(ifname2, "wifi", 4);
1593 wpa_driver_wext_alternative_ifindex(drv->wext, ifname2);
1594 }
1595
1596 wpa_driver_hostap_set_wpa(drv, 1);
1597
1598 return drv;
1599 }
1600
1601
1602 static void wpa_driver_hostap_deinit(void *priv)
1603 {
1604 struct wpa_driver_hostap_data *drv = priv;
1605 wpa_driver_hostap_set_wpa(drv, 0);
1606 wpa_driver_wext_deinit(drv->wext);
1607 close(drv->sock);
1608 os_free(drv);
1609 }
1610
1611 #endif /* HOSTAPD */
1612
1613
1614 const struct wpa_driver_ops wpa_driver_hostap_ops = {
1615 .name = "hostap",
1616 .desc = "Host AP driver (Intersil Prism2/2.5/3)",
1617 .set_key = wpa_driver_hostap_set_key,
1618 #ifdef HOSTAPD
1619 .hapd_init = hostap_init,
1620 .hapd_deinit = hostap_driver_deinit,
1621 .set_ieee8021x = hostap_set_ieee8021x,
1622 .set_privacy = hostap_set_privacy,
1623 .get_seqnum = hostap_get_seqnum,
1624 .flush = hostap_flush,
1625 .set_generic_elem = hostap_set_generic_elem,
1626 .read_sta_data = hostap_read_sta_data,
1627 .hapd_send_eapol = hostap_send_eapol,
1628 .sta_set_flags = hostap_sta_set_flags,
1629 .sta_deauth = hostap_sta_deauth,
1630 .sta_disassoc = hostap_sta_disassoc,
1631 .sta_remove = hostap_sta_remove,
1632 .hapd_set_ssid = hostap_set_ssid,
1633 .send_mlme = hostap_send_mlme,
1634 .sta_add = hostap_sta_add,
1635 .get_inact_sec = hostap_get_inact_sec,
1636 .sta_clear_stats = hostap_sta_clear_stats,
1637 .get_hw_feature_data = hostap_get_hw_feature_data,
1638 .set_ap_wps_ie = hostap_set_ap_wps_ie,
1639 #else /* HOSTAPD */
1640 .get_bssid = wpa_driver_hostap_get_bssid,
1641 .get_ssid = wpa_driver_hostap_get_ssid,
1642 .set_countermeasures = wpa_driver_hostap_set_countermeasures,
1643 .scan2 = wpa_driver_hostap_scan,
1644 .get_scan_results2 = wpa_driver_hostap_get_scan_results,
1645 .deauthenticate = wpa_driver_hostap_deauthenticate,
1646 .disassociate = wpa_driver_hostap_disassociate,
1647 .associate = wpa_driver_hostap_associate,
1648 .init = wpa_driver_hostap_init,
1649 .deinit = wpa_driver_hostap_deinit,
1650 .set_operstate = wpa_driver_hostap_set_operstate,
1651 #endif /* HOSTAPD */
1652 };