1 /*
2 * Driver interaction with Linux Host AP driver
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10 #include <sys/ioctl.h>
11
12 #include "linux_wext.h"
13 #include "common.h"
14 #include "driver.h"
15 #include "driver_wext.h"
16 #include "eloop.h"
17 #include "driver_hostap.h"
18
19
20 #include <net/if_arp.h>
21 #include <netpacket/packet.h>
22
23 #include "priv_netlink.h"
24 #include "netlink.h"
25 #include "linux_ioctl.h"
26 #include "common/ieee802_11_defs.h"
27 #include "common/ieee802_11_common.h"
28
29
30 /* MTU to be set for the wlan#ap device; this is mainly needed for IEEE 802.1X
31 * frames that might be longer than normal default MTU and they are not
32 * fragmented */
33 #define HOSTAPD_MTU 2290
34
35 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
36
37 struct hostap_driver_data {
38 struct hostapd_data *hapd;
39
40 char iface[IFNAMSIZ + 1];
41 int sock; /* raw packet socket for driver access */
42 int ioctl_sock; /* socket for ioctl() use */
43 struct netlink_data *netlink;
44
45 int we_version;
46
47 u8 *generic_ie;
48 size_t generic_ie_len;
49 u8 *wps_ie;
50 size_t wps_ie_len;
51 };
52
53
54 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
55 int len);
56 static int hostap_set_iface_flags(void *priv, int dev_up);
57
handle_data(struct hostap_driver_data * drv,u8 * buf,size_t len,u16 stype)58 static void handle_data(struct hostap_driver_data *drv, u8 *buf, size_t len,
59 u16 stype)
60 {
61 struct ieee80211_hdr *hdr;
62 u16 fc, ethertype;
63 u8 *pos, *sa;
64 size_t left;
65 union wpa_event_data event;
66
67 if (len < sizeof(struct ieee80211_hdr))
68 return;
69
70 hdr = (struct ieee80211_hdr *) buf;
71 fc = le_to_host16(hdr->frame_control);
72
73 if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) {
74 printf("Not ToDS data frame (fc=0x%04x)\n", fc);
75 return;
76 }
77
78 sa = hdr->addr2;
79 os_memset(&event, 0, sizeof(event));
80 event.rx_from_unknown.bssid = get_hdr_bssid(hdr, len);
81 event.rx_from_unknown.addr = sa;
82 wpa_supplicant_event(drv->hapd, EVENT_RX_FROM_UNKNOWN, &event);
83
84 pos = (u8 *) (hdr + 1);
85 left = len - sizeof(*hdr);
86
87 if (left < sizeof(rfc1042_header)) {
88 printf("Too short data frame\n");
89 return;
90 }
91
92 if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) {
93 printf("Data frame with no RFC1042 header\n");
94 return;
95 }
96 pos += sizeof(rfc1042_header);
97 left -= sizeof(rfc1042_header);
98
99 if (left < 2) {
100 printf("No ethertype in data frame\n");
101 return;
102 }
103
104 ethertype = WPA_GET_BE16(pos);
105 pos += 2;
106 left -= 2;
107 switch (ethertype) {
108 case ETH_P_PAE:
109 drv_event_eapol_rx(drv->hapd, sa, pos, left);
110 break;
111
112 default:
113 printf("Unknown ethertype 0x%04x in data frame\n", ethertype);
114 break;
115 }
116 }
117
118
handle_tx_callback(struct hostap_driver_data * drv,u8 * buf,size_t len,int ok)119 static void handle_tx_callback(struct hostap_driver_data *drv, u8 *buf,
120 size_t len, int ok)
121 {
122 struct ieee80211_hdr *hdr;
123 u16 fc;
124 union wpa_event_data event;
125
126 hdr = (struct ieee80211_hdr *) buf;
127 fc = le_to_host16(hdr->frame_control);
128
129 os_memset(&event, 0, sizeof(event));
130 event.tx_status.type = WLAN_FC_GET_TYPE(fc);
131 event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
132 event.tx_status.dst = hdr->addr1;
133 event.tx_status.data = buf;
134 event.tx_status.data_len = len;
135 event.tx_status.ack = ok;
136 wpa_supplicant_event(drv->hapd, EVENT_TX_STATUS, &event);
137 }
138
139
handle_frame(struct hostap_driver_data * drv,u8 * buf,size_t len)140 static void handle_frame(struct hostap_driver_data *drv, u8 *buf, size_t len)
141 {
142 struct ieee80211_hdr *hdr;
143 u16 fc, type, stype;
144 size_t data_len = len;
145 int ver;
146 union wpa_event_data event;
147
148 /* PSPOLL is only 16 bytes, but driver does not (at least yet) pass
149 * these to user space */
150 if (len < 24) {
151 wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)",
152 (unsigned long) len);
153 return;
154 }
155
156 hdr = (struct ieee80211_hdr *) buf;
157 fc = le_to_host16(hdr->frame_control);
158 type = WLAN_FC_GET_TYPE(fc);
159 stype = WLAN_FC_GET_STYPE(fc);
160
161 if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) {
162 wpa_hexdump(MSG_MSGDUMP, "Received management frame",
163 buf, len);
164 }
165
166 ver = fc & WLAN_FC_PVER;
167
168 /* protocol version 2 is reserved for indicating ACKed frame (TX
169 * callbacks), and version 1 for indicating failed frame (no ACK, TX
170 * callbacks) */
171 if (ver == 1 || ver == 2) {
172 handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0);
173 return;
174 } else if (ver != 0) {
175 printf("unknown protocol version %d\n", ver);
176 return;
177 }
178
179 switch (type) {
180 case WLAN_FC_TYPE_MGMT:
181 os_memset(&event, 0, sizeof(event));
182 event.rx_mgmt.frame = buf;
183 event.rx_mgmt.frame_len = data_len;
184 wpa_supplicant_event(drv->hapd, EVENT_RX_MGMT, &event);
185 break;
186 case WLAN_FC_TYPE_CTRL:
187 wpa_printf(MSG_DEBUG, "CTRL");
188 break;
189 case WLAN_FC_TYPE_DATA:
190 wpa_printf(MSG_DEBUG, "DATA");
191 handle_data(drv, buf, data_len, stype);
192 break;
193 default:
194 wpa_printf(MSG_DEBUG, "unknown frame type %d", type);
195 break;
196 }
197 }
198
199
handle_read(int sock,void * eloop_ctx,void * sock_ctx)200 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
201 {
202 struct hostap_driver_data *drv = eloop_ctx;
203 int len;
204 unsigned char buf[3000];
205
206 len = recv(sock, buf, sizeof(buf), 0);
207 if (len < 0) {
208 wpa_printf(MSG_ERROR, "recv: %s", strerror(errno));
209 return;
210 }
211
212 handle_frame(drv, buf, len);
213 }
214
215
hostap_init_sockets(struct hostap_driver_data * drv,u8 * own_addr)216 static int hostap_init_sockets(struct hostap_driver_data *drv, u8 *own_addr)
217 {
218 struct ifreq ifr;
219 struct sockaddr_ll addr;
220
221 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
222 if (drv->sock < 0) {
223 wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s",
224 strerror(errno));
225 return -1;
226 }
227
228 if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) {
229 wpa_printf(MSG_ERROR, "Could not register read socket");
230 return -1;
231 }
232
233 memset(&ifr, 0, sizeof(ifr));
234 if (os_snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap",
235 drv->iface) >= (int) sizeof(ifr.ifr_name)) {
236 wpa_printf(MSG_ERROR, "hostap: AP interface name truncated");
237 return -1;
238 }
239 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
240 wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s",
241 strerror(errno));
242 return -1;
243 }
244
245 if (hostap_set_iface_flags(drv, 1)) {
246 return -1;
247 }
248
249 memset(&addr, 0, sizeof(addr));
250 addr.sll_family = AF_PACKET;
251 addr.sll_ifindex = ifr.ifr_ifindex;
252 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
253 addr.sll_ifindex);
254
255 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
256 wpa_printf(MSG_ERROR, "bind: %s", strerror(errno));
257 return -1;
258 }
259
260 return linux_get_ifhwaddr(drv->sock, drv->iface, own_addr);
261 }
262
263
hostap_send_mlme(void * priv,const u8 * msg,size_t len,int noack,unsigned int freq,const u16 * csa_offs,size_t csa_offs_len,int no_encrypt,unsigned int wait,int link_id)264 static int hostap_send_mlme(void *priv, const u8 *msg, size_t len, int noack,
265 unsigned int freq,
266 const u16 *csa_offs, size_t csa_offs_len,
267 int no_encrypt, unsigned int wait, int link_id)
268 {
269 struct hostap_driver_data *drv = priv;
270 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg;
271 int res;
272
273 /* Request TX callback */
274 hdr->frame_control |= host_to_le16(BIT(1));
275 res = send(drv->sock, msg, len, 0);
276 hdr->frame_control &= ~host_to_le16(BIT(1));
277
278 return res;
279 }
280
281
hostap_send_eapol(void * priv,const u8 * addr,const u8 * data,size_t data_len,int encrypt,const u8 * own_addr,u32 flags,int link_id)282 static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data,
283 size_t data_len, int encrypt, const u8 *own_addr,
284 u32 flags, int link_id)
285 {
286 struct hostap_driver_data *drv = priv;
287 struct ieee80211_hdr *hdr;
288 size_t len;
289 u8 *pos;
290 int res;
291
292 len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len;
293 hdr = os_zalloc(len);
294 if (hdr == NULL) {
295 printf("malloc() failed for hostapd_send_data(len=%lu)\n",
296 (unsigned long) len);
297 return -1;
298 }
299
300 hdr->frame_control =
301 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
302 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
303 if (encrypt)
304 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
305 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
306 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
307 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
308
309 pos = (u8 *) (hdr + 1);
310 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
311 pos += sizeof(rfc1042_header);
312 *((u16 *) pos) = htons(ETH_P_PAE);
313 pos += 2;
314 memcpy(pos, data, data_len);
315
316 res = hostap_send_mlme(drv, (u8 *) hdr, len, 0, 0, NULL, 0, 0, 0, -1);
317 if (res < 0) {
318 wpa_printf(MSG_ERROR, "hostap_send_eapol - packet len: %lu - "
319 "failed: %d (%s)",
320 (unsigned long) len, errno, strerror(errno));
321 }
322 os_free(hdr);
323
324 return res;
325 }
326
327
hostap_sta_set_flags(void * priv,const u8 * addr,unsigned int total_flags,unsigned int flags_or,unsigned int flags_and)328 static int hostap_sta_set_flags(void *priv, const u8 *addr,
329 unsigned int total_flags, unsigned int flags_or,
330 unsigned int flags_and)
331 {
332 struct hostap_driver_data *drv = priv;
333 struct prism2_hostapd_param param;
334
335 if (flags_or & WPA_STA_AUTHORIZED)
336 flags_or = BIT(5); /* WLAN_STA_AUTHORIZED */
337 if (!(flags_and & WPA_STA_AUTHORIZED))
338 flags_and = ~BIT(5);
339 else
340 flags_and = ~0;
341 memset(¶m, 0, sizeof(param));
342 param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA;
343 memcpy(param.sta_addr, addr, ETH_ALEN);
344 param.u.set_flags_sta.flags_or = flags_or;
345 param.u.set_flags_sta.flags_and = flags_and;
346 return hostapd_ioctl(drv, ¶m, sizeof(param));
347 }
348
349
hostap_set_iface_flags(void * priv,int dev_up)350 static int hostap_set_iface_flags(void *priv, int dev_up)
351 {
352 struct hostap_driver_data *drv = priv;
353 struct ifreq ifr;
354 char ifname[IFNAMSIZ];
355
356 if (os_snprintf(ifname, IFNAMSIZ, "%sap", drv->iface) >= IFNAMSIZ) {
357 wpa_printf(MSG_ERROR, "hostap: AP interface name truncated");
358 return -1;
359 }
360 if (linux_set_iface_flags(drv->ioctl_sock, ifname, dev_up) < 0)
361 return -1;
362
363 if (dev_up) {
364 memset(&ifr, 0, sizeof(ifr));
365 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
366 ifr.ifr_mtu = HOSTAPD_MTU;
367 if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
368 wpa_printf(MSG_INFO,
369 "Setting MTU failed - trying to survive with current value: ioctl[SIOCSIFMTU]: %s",
370 strerror(errno));
371 }
372 }
373
374 return 0;
375 }
376
377
hostapd_ioctl(void * priv,struct prism2_hostapd_param * param,int len)378 static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
379 int len)
380 {
381 struct hostap_driver_data *drv = priv;
382 struct iwreq iwr;
383
384 memset(&iwr, 0, sizeof(iwr));
385 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
386 iwr.u.data.pointer = (caddr_t) param;
387 iwr.u.data.length = len;
388
389 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
390 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_HOSTAPD]: %s",
391 strerror(errno));
392 return -1;
393 }
394
395 return 0;
396 }
397
398
wpa_driver_hostap_set_key(void * priv,struct wpa_driver_set_key_params * params)399 static int wpa_driver_hostap_set_key(void *priv,
400 struct wpa_driver_set_key_params *params)
401 {
402 struct hostap_driver_data *drv = priv;
403 struct prism2_hostapd_param *param;
404 u8 *buf;
405 size_t blen;
406 int ret = 0;
407 enum wpa_alg alg = params->alg;
408 const u8 *addr = params->addr;
409 int key_idx = params->key_idx;
410 int set_tx = params->set_tx;
411 const u8 *key = params->key;
412 size_t key_len = params->key_len;
413
414 blen = sizeof(*param) + key_len;
415 buf = os_zalloc(blen);
416 if (buf == NULL)
417 return -1;
418
419 param = (struct prism2_hostapd_param *) buf;
420 param->cmd = PRISM2_SET_ENCRYPTION;
421 if (addr == NULL)
422 memset(param->sta_addr, 0xff, ETH_ALEN);
423 else
424 memcpy(param->sta_addr, addr, ETH_ALEN);
425 switch (alg) {
426 case WPA_ALG_NONE:
427 os_strlcpy((char *) param->u.crypt.alg, "NONE",
428 HOSTAP_CRYPT_ALG_NAME_LEN);
429 break;
430 case WPA_ALG_WEP:
431 os_strlcpy((char *) param->u.crypt.alg, "WEP",
432 HOSTAP_CRYPT_ALG_NAME_LEN);
433 break;
434 case WPA_ALG_TKIP:
435 os_strlcpy((char *) param->u.crypt.alg, "TKIP",
436 HOSTAP_CRYPT_ALG_NAME_LEN);
437 break;
438 case WPA_ALG_CCMP:
439 os_strlcpy((char *) param->u.crypt.alg, "CCMP",
440 HOSTAP_CRYPT_ALG_NAME_LEN);
441 break;
442 default:
443 os_free(buf);
444 return -1;
445 }
446 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
447 param->u.crypt.idx = key_idx;
448 param->u.crypt.key_len = key_len;
449 memcpy((u8 *) (param + 1), key, key_len);
450
451 if (hostapd_ioctl(drv, param, blen)) {
452 printf("Failed to set encryption.\n");
453 ret = -1;
454 }
455 free(buf);
456
457 return ret;
458 }
459
460
hostap_get_seqnum(const char * ifname,void * priv,const u8 * addr,int idx,int link_id,u8 * seq)461 static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr,
462 int idx, int link_id, u8 *seq)
463 {
464 struct hostap_driver_data *drv = priv;
465 struct prism2_hostapd_param *param;
466 u8 *buf;
467 size_t blen;
468 int ret = 0;
469
470 blen = sizeof(*param) + 32;
471 buf = os_zalloc(blen);
472 if (buf == NULL)
473 return -1;
474
475 param = (struct prism2_hostapd_param *) buf;
476 param->cmd = PRISM2_GET_ENCRYPTION;
477 if (addr == NULL)
478 os_memset(param->sta_addr, 0xff, ETH_ALEN);
479 else
480 os_memcpy(param->sta_addr, addr, ETH_ALEN);
481 param->u.crypt.idx = idx;
482
483 if (hostapd_ioctl(drv, param, blen)) {
484 printf("Failed to get encryption.\n");
485 ret = -1;
486 } else {
487 os_memcpy(seq, param->u.crypt.seq, 8);
488 }
489 os_free(buf);
490
491 return ret;
492 }
493
494
hostap_ioctl_prism2param(void * priv,int param,int value)495 static int hostap_ioctl_prism2param(void *priv, int param, int value)
496 {
497 struct hostap_driver_data *drv = priv;
498 struct iwreq iwr;
499 int *i;
500
501 memset(&iwr, 0, sizeof(iwr));
502 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
503 i = (int *) iwr.u.name;
504 *i++ = param;
505 *i++ = value;
506
507 if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
508 wpa_printf(MSG_ERROR, "ioctl[PRISM2_IOCTL_PRISM2_PARAM]: %s",
509 strerror(errno));
510 return -1;
511 }
512
513 return 0;
514 }
515
516
hostap_set_ieee8021x(void * priv,struct wpa_bss_params * params)517 static int hostap_set_ieee8021x(void *priv, struct wpa_bss_params *params)
518 {
519 struct hostap_driver_data *drv = priv;
520 int enabled = params->enabled;
521
522 /* enable kernel driver support for IEEE 802.1X */
523 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) {
524 printf("Could not setup IEEE 802.1X support in kernel driver."
525 "\n");
526 return -1;
527 }
528
529 if (!enabled)
530 return 0;
531
532 /* use host driver implementation of encryption to allow
533 * individual keys and passing plaintext EAPOL frames */
534 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) ||
535 hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) {
536 printf("Could not setup host-based encryption in kernel "
537 "driver.\n");
538 return -1;
539 }
540
541 return 0;
542 }
543
544
hostap_set_privacy(void * priv,int enabled)545 static int hostap_set_privacy(void *priv, int enabled)
546 {
547 struct hostap_drvier_data *drv = priv;
548
549 return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
550 enabled);
551 }
552
553
hostap_set_ssid(void * priv,const u8 * buf,int len)554 static int hostap_set_ssid(void *priv, const u8 *buf, int len)
555 {
556 struct hostap_driver_data *drv = priv;
557 struct iwreq iwr;
558
559 memset(&iwr, 0, sizeof(iwr));
560 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
561 iwr.u.essid.flags = 1; /* SSID active */
562 iwr.u.essid.pointer = (caddr_t) buf;
563 iwr.u.essid.length = len + 1;
564
565 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
566 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID,len=%d]: %s",
567 len, strerror(errno));
568 return -1;
569 }
570
571 return 0;
572 }
573
574
hostap_flush(void * priv,int link_id)575 static int hostap_flush(void *priv, int link_id)
576 {
577 struct hostap_driver_data *drv = priv;
578 struct prism2_hostapd_param param;
579
580 memset(¶m, 0, sizeof(param));
581 param.cmd = PRISM2_HOSTAPD_FLUSH;
582 return hostapd_ioctl(drv, ¶m, sizeof(param));
583 }
584
585
hostap_read_sta_data(void * priv,struct hostap_sta_driver_data * data,const u8 * addr)586 static int hostap_read_sta_data(void *priv,
587 struct hostap_sta_driver_data *data,
588 const u8 *addr)
589 {
590 struct hostap_driver_data *drv = priv;
591 char buf[1024], line[128], *pos;
592 FILE *f;
593 unsigned long val;
594
595 memset(data, 0, sizeof(*data));
596 snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR,
597 drv->iface, MAC2STR(addr));
598
599 f = fopen(buf, "r");
600 if (!f)
601 return -1;
602 /* Need to read proc file with in one piece, so use large enough
603 * buffer. */
604 setbuffer(f, buf, sizeof(buf));
605
606 while (fgets(line, sizeof(line), f)) {
607 pos = strchr(line, '=');
608 if (!pos)
609 continue;
610 *pos++ = '\0';
611 val = strtoul(pos, NULL, 10);
612 if (strcmp(line, "rx_packets") == 0)
613 data->rx_packets = val;
614 else if (strcmp(line, "tx_packets") == 0)
615 data->tx_packets = val;
616 else if (strcmp(line, "rx_bytes") == 0)
617 data->rx_bytes = val;
618 else if (strcmp(line, "tx_bytes") == 0)
619 data->tx_bytes = val;
620 }
621
622 fclose(f);
623
624 return 0;
625 }
626
627
hostap_sta_add(void * priv,struct hostapd_sta_add_params * params)628 static int hostap_sta_add(void *priv, struct hostapd_sta_add_params *params)
629 {
630 struct hostap_driver_data *drv = priv;
631 struct prism2_hostapd_param param;
632 int tx_supp_rates = 0;
633 size_t i;
634
635 #define WLAN_RATE_1M BIT(0)
636 #define WLAN_RATE_2M BIT(1)
637 #define WLAN_RATE_5M5 BIT(2)
638 #define WLAN_RATE_11M BIT(3)
639
640 for (i = 0; i < params->supp_rates_len; i++) {
641 if ((params->supp_rates[i] & 0x7f) == 2)
642 tx_supp_rates |= WLAN_RATE_1M;
643 if ((params->supp_rates[i] & 0x7f) == 4)
644 tx_supp_rates |= WLAN_RATE_2M;
645 if ((params->supp_rates[i] & 0x7f) == 11)
646 tx_supp_rates |= WLAN_RATE_5M5;
647 if ((params->supp_rates[i] & 0x7f) == 22)
648 tx_supp_rates |= WLAN_RATE_11M;
649 }
650
651 memset(¶m, 0, sizeof(param));
652 param.cmd = PRISM2_HOSTAPD_ADD_STA;
653 memcpy(param.sta_addr, params->addr, ETH_ALEN);
654 param.u.add_sta.aid = params->aid;
655 param.u.add_sta.capability = params->capability;
656 param.u.add_sta.tx_supp_rates = tx_supp_rates;
657 return hostapd_ioctl(drv, ¶m, sizeof(param));
658 }
659
660
hostap_sta_remove(void * priv,const u8 * addr)661 static int hostap_sta_remove(void *priv, const u8 *addr)
662 {
663 struct hostap_driver_data *drv = priv;
664 struct prism2_hostapd_param param;
665
666 hostap_sta_set_flags(drv, addr, 0, 0, ~WPA_STA_AUTHORIZED);
667
668 memset(¶m, 0, sizeof(param));
669 param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
670 memcpy(param.sta_addr, addr, ETH_ALEN);
671 if (hostapd_ioctl(drv, ¶m, sizeof(param))) {
672 printf("Could not remove station from kernel driver.\n");
673 return -1;
674 }
675 return 0;
676 }
677
678
hostap_get_inact_sec(void * priv,const u8 * addr)679 static int hostap_get_inact_sec(void *priv, const u8 *addr)
680 {
681 struct hostap_driver_data *drv = priv;
682 struct prism2_hostapd_param param;
683
684 memset(¶m, 0, sizeof(param));
685 param.cmd = PRISM2_HOSTAPD_GET_INFO_STA;
686 memcpy(param.sta_addr, addr, ETH_ALEN);
687 if (hostapd_ioctl(drv, ¶m, sizeof(param))) {
688 return -1;
689 }
690
691 return param.u.get_info_sta.inactive_sec;
692 }
693
694
hostap_sta_clear_stats(void * priv,const u8 * addr)695 static int hostap_sta_clear_stats(void *priv, const u8 *addr)
696 {
697 struct hostap_driver_data *drv = priv;
698 struct prism2_hostapd_param param;
699
700 memset(¶m, 0, sizeof(param));
701 param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS;
702 memcpy(param.sta_addr, addr, ETH_ALEN);
703 if (hostapd_ioctl(drv, ¶m, sizeof(param))) {
704 return -1;
705 }
706
707 return 0;
708 }
709
710
hostapd_ioctl_set_generic_elem(struct hostap_driver_data * drv)711 static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv)
712 {
713 struct prism2_hostapd_param *param;
714 int res;
715 size_t blen, elem_len;
716
717 elem_len = drv->generic_ie_len + drv->wps_ie_len;
718 blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len;
719 if (blen < sizeof(*param))
720 blen = sizeof(*param);
721
722 param = os_zalloc(blen);
723 if (param == NULL)
724 return -1;
725
726 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
727 param->u.generic_elem.len = elem_len;
728 if (drv->generic_ie) {
729 os_memcpy(param->u.generic_elem.data, drv->generic_ie,
730 drv->generic_ie_len);
731 }
732 if (drv->wps_ie) {
733 os_memcpy(¶m->u.generic_elem.data[drv->generic_ie_len],
734 drv->wps_ie, drv->wps_ie_len);
735 }
736 wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE",
737 param->u.generic_elem.data, elem_len);
738 res = hostapd_ioctl(drv, param, blen);
739
740 os_free(param);
741
742 return res;
743 }
744
745
hostap_set_generic_elem(void * priv,const u8 * elem,size_t elem_len)746 static int hostap_set_generic_elem(void *priv,
747 const u8 *elem, size_t elem_len)
748 {
749 struct hostap_driver_data *drv = priv;
750
751 os_free(drv->generic_ie);
752 drv->generic_ie = NULL;
753 drv->generic_ie_len = 0;
754 if (elem) {
755 drv->generic_ie = os_memdup(elem, elem_len);
756 if (drv->generic_ie == NULL)
757 return -1;
758 drv->generic_ie_len = elem_len;
759 }
760
761 return hostapd_ioctl_set_generic_elem(drv);
762 }
763
764
hostap_set_ap_wps_ie(void * priv,const struct wpabuf * beacon,const struct wpabuf * proberesp,const struct wpabuf * assocresp)765 static int hostap_set_ap_wps_ie(void *priv, const struct wpabuf *beacon,
766 const struct wpabuf *proberesp,
767 const struct wpabuf *assocresp)
768 {
769 struct hostap_driver_data *drv = priv;
770
771 /*
772 * Host AP driver supports only one set of extra IEs, so we need to
773 * use the Probe Response IEs also for Beacon frames since they include
774 * more information.
775 */
776
777 os_free(drv->wps_ie);
778 drv->wps_ie = NULL;
779 drv->wps_ie_len = 0;
780 if (proberesp) {
781 drv->wps_ie = os_memdup(wpabuf_head(proberesp),
782 wpabuf_len(proberesp));
783 if (drv->wps_ie == NULL)
784 return -1;
785 drv->wps_ie_len = wpabuf_len(proberesp);
786 }
787
788 return hostapd_ioctl_set_generic_elem(drv);
789 }
790
791
792 static void
hostapd_wireless_event_wireless_custom(struct hostap_driver_data * drv,char * custom)793 hostapd_wireless_event_wireless_custom(struct hostap_driver_data *drv,
794 char *custom)
795 {
796 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
797
798 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
799 char *pos;
800 u8 addr[ETH_ALEN];
801 pos = strstr(custom, "addr=");
802 if (pos == NULL) {
803 wpa_printf(MSG_DEBUG,
804 "MLME-MICHAELMICFAILURE.indication "
805 "without sender address ignored");
806 return;
807 }
808 pos += 5;
809 if (hwaddr_aton(pos, addr) == 0) {
810 union wpa_event_data data;
811 os_memset(&data, 0, sizeof(data));
812 data.michael_mic_failure.unicast = 1;
813 data.michael_mic_failure.src = addr;
814 wpa_supplicant_event(drv->hapd,
815 EVENT_MICHAEL_MIC_FAILURE, &data);
816 } else {
817 wpa_printf(MSG_DEBUG,
818 "MLME-MICHAELMICFAILURE.indication "
819 "with invalid MAC address");
820 }
821 }
822 }
823
824
hostapd_wireless_event_wireless(struct hostap_driver_data * drv,char * data,unsigned int len)825 static void hostapd_wireless_event_wireless(struct hostap_driver_data *drv,
826 char *data, unsigned int len)
827 {
828 struct iw_event iwe_buf, *iwe = &iwe_buf;
829 char *pos, *end, *custom, *buf;
830
831 pos = data;
832 end = data + len;
833
834 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
835 /* Event data may be unaligned, so make a local, aligned copy
836 * before processing. */
837 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
838 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
839 iwe->cmd, iwe->len);
840 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
841 return;
842
843 custom = pos + IW_EV_POINT_LEN;
844 if (drv->we_version > 18 &&
845 (iwe->cmd == IWEVMICHAELMICFAILURE ||
846 iwe->cmd == IWEVCUSTOM)) {
847 /* WE-19 removed the pointer from struct iw_point */
848 char *dpos = (char *) &iwe_buf.u.data.length;
849 int dlen = dpos - (char *) &iwe_buf;
850 memcpy(dpos, pos + IW_EV_LCP_LEN,
851 sizeof(struct iw_event) - dlen);
852 } else {
853 memcpy(&iwe_buf, pos, sizeof(struct iw_event));
854 custom += IW_EV_POINT_OFF;
855 }
856
857 switch (iwe->cmd) {
858 case IWEVCUSTOM:
859 if (iwe->u.data.length > end - custom)
860 return;
861 buf = malloc(iwe->u.data.length + 1);
862 if (buf == NULL)
863 return;
864 memcpy(buf, custom, iwe->u.data.length);
865 buf[iwe->u.data.length] = '\0';
866 hostapd_wireless_event_wireless_custom(drv, buf);
867 free(buf);
868 break;
869 }
870
871 pos += iwe->len;
872 }
873 }
874
875
hostapd_wireless_event_rtm_newlink(void * ctx,struct ifinfomsg * ifi,u8 * buf,size_t len)876 static void hostapd_wireless_event_rtm_newlink(void *ctx,
877 struct ifinfomsg *ifi,
878 u8 *buf, size_t len)
879 {
880 struct hostap_driver_data *drv = ctx;
881 int attrlen, rta_len;
882 struct rtattr *attr;
883
884 /* TODO: use ifi->ifi_index to filter out wireless events from other
885 * interfaces */
886
887 attrlen = len;
888 attr = (struct rtattr *) buf;
889
890 rta_len = RTA_ALIGN(sizeof(struct rtattr));
891 while (RTA_OK(attr, attrlen)) {
892 if (attr->rta_type == IFLA_WIRELESS) {
893 hostapd_wireless_event_wireless(
894 drv, ((char *) attr) + rta_len,
895 attr->rta_len - rta_len);
896 }
897 attr = RTA_NEXT(attr, attrlen);
898 }
899 }
900
901
hostap_get_we_version(struct hostap_driver_data * drv)902 static int hostap_get_we_version(struct hostap_driver_data *drv)
903 {
904 struct iw_range *range;
905 struct iwreq iwr;
906 int minlen;
907 size_t buflen;
908
909 drv->we_version = 0;
910
911 /*
912 * Use larger buffer than struct iw_range in order to allow the
913 * structure to grow in the future.
914 */
915 buflen = sizeof(struct iw_range) + 500;
916 range = os_zalloc(buflen);
917 if (range == NULL)
918 return -1;
919
920 memset(&iwr, 0, sizeof(iwr));
921 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
922 iwr.u.data.pointer = (caddr_t) range;
923 iwr.u.data.length = buflen;
924
925 minlen = ((char *) &range->enc_capa) - (char *) range +
926 sizeof(range->enc_capa);
927
928 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
929 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s",
930 strerror(errno));
931 os_free(range);
932 return -1;
933 } else if (iwr.u.data.length >= minlen &&
934 range->we_version_compiled >= 18) {
935 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
936 "WE(source)=%d enc_capa=0x%x",
937 range->we_version_compiled,
938 range->we_version_source,
939 range->enc_capa);
940 drv->we_version = range->we_version_compiled;
941 }
942
943 free(range);
944 return 0;
945 }
946
947
hostap_wireless_event_init(struct hostap_driver_data * drv)948 static int hostap_wireless_event_init(struct hostap_driver_data *drv)
949 {
950 struct netlink_config *cfg;
951
952 hostap_get_we_version(drv);
953
954 cfg = os_zalloc(sizeof(*cfg));
955 if (cfg == NULL)
956 return -1;
957 cfg->ctx = drv;
958 cfg->newlink_cb = hostapd_wireless_event_rtm_newlink;
959 drv->netlink = netlink_init(cfg);
960 if (drv->netlink == NULL) {
961 os_free(cfg);
962 return -1;
963 }
964
965 return 0;
966 }
967
968
hostap_init(struct hostapd_data * hapd,struct wpa_init_params * params)969 static void * hostap_init(struct hostapd_data *hapd,
970 struct wpa_init_params *params)
971 {
972 struct hostap_driver_data *drv;
973
974 drv = os_zalloc(sizeof(struct hostap_driver_data));
975 if (drv == NULL) {
976 printf("Could not allocate memory for hostapd driver data\n");
977 return NULL;
978 }
979
980 drv->hapd = hapd;
981 drv->ioctl_sock = drv->sock = -1;
982 memcpy(drv->iface, params->ifname, sizeof(drv->iface));
983
984 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
985 if (drv->ioctl_sock < 0) {
986 wpa_printf(MSG_ERROR, "socket[PF_INET,SOCK_DGRAM]: %s",
987 strerror(errno));
988 os_free(drv);
989 return NULL;
990 }
991
992 if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) {
993 wpa_printf(MSG_ERROR,
994 "Could not enable hostapd mode for interface %s",
995 drv->iface);
996 close(drv->ioctl_sock);
997 os_free(drv);
998 return NULL;
999 }
1000
1001 if (hostap_init_sockets(drv, params->own_addr) ||
1002 hostap_wireless_event_init(drv)) {
1003 close(drv->ioctl_sock);
1004 os_free(drv);
1005 return NULL;
1006 }
1007
1008 return drv;
1009 }
1010
1011
hostap_driver_deinit(void * priv)1012 static void hostap_driver_deinit(void *priv)
1013 {
1014 struct hostap_driver_data *drv = priv;
1015
1016 netlink_deinit(drv->netlink);
1017 (void) hostap_set_iface_flags(drv, 0);
1018 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0);
1019 (void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0);
1020
1021 if (drv->ioctl_sock >= 0)
1022 close(drv->ioctl_sock);
1023
1024 if (drv->sock >= 0)
1025 close(drv->sock);
1026
1027 os_free(drv->generic_ie);
1028 os_free(drv->wps_ie);
1029
1030 free(drv);
1031 }
1032
1033
hostap_sta_deauth(void * priv,const u8 * own_addr,const u8 * addr,u16 reason,int link_id)1034 static int hostap_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
1035 u16 reason, int link_id)
1036 {
1037 struct hostap_driver_data *drv = priv;
1038 struct ieee80211_mgmt mgmt;
1039
1040 if (is_broadcast_ether_addr(addr)) {
1041 /*
1042 * New Prism2.5/3 STA firmware versions seem to have issues
1043 * with this broadcast deauth frame. This gets the firmware in
1044 * odd state where nothing works correctly, so let's skip
1045 * sending this for the hostap driver.
1046 */
1047 return 0;
1048 }
1049
1050 memset(&mgmt, 0, sizeof(mgmt));
1051 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1052 WLAN_FC_STYPE_DEAUTH);
1053 memcpy(mgmt.da, addr, ETH_ALEN);
1054 memcpy(mgmt.sa, own_addr, ETH_ALEN);
1055 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
1056 mgmt.u.deauth.reason_code = host_to_le16(reason);
1057 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN +
1058 sizeof(mgmt.u.deauth), 0, 0, NULL, 0, 0, 0, -1);
1059 }
1060
1061
hostap_set_freq(void * priv,struct hostapd_freq_params * freq)1062 static int hostap_set_freq(void *priv, struct hostapd_freq_params *freq)
1063 {
1064 struct hostap_driver_data *drv = priv;
1065 struct iwreq iwr;
1066
1067 os_memset(&iwr, 0, sizeof(iwr));
1068 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
1069 iwr.u.freq.m = freq->channel;
1070 iwr.u.freq.e = 0;
1071
1072 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
1073 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s",
1074 strerror(errno));
1075 return -1;
1076 }
1077
1078 return 0;
1079 }
1080
1081
hostap_sta_disassoc(void * priv,const u8 * own_addr,const u8 * addr,u16 reason)1082 static int hostap_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
1083 u16 reason)
1084 {
1085 struct hostap_driver_data *drv = priv;
1086 struct ieee80211_mgmt mgmt;
1087
1088 memset(&mgmt, 0, sizeof(mgmt));
1089 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1090 WLAN_FC_STYPE_DISASSOC);
1091 memcpy(mgmt.da, addr, ETH_ALEN);
1092 memcpy(mgmt.sa, own_addr, ETH_ALEN);
1093 memcpy(mgmt.bssid, own_addr, ETH_ALEN);
1094 mgmt.u.disassoc.reason_code = host_to_le16(reason);
1095 return hostap_send_mlme(drv, (u8 *) &mgmt, IEEE80211_HDRLEN +
1096 sizeof(mgmt.u.disassoc), 0, 0, NULL, 0, 0, 0,
1097 -1);
1098 }
1099
1100
hostap_get_hw_feature_data(void * priv,u16 * num_modes,u16 * flags,u8 * dfs)1101 static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv,
1102 u16 *num_modes,
1103 u16 *flags, u8 *dfs)
1104 {
1105 struct hostapd_hw_modes *mode;
1106 int i, clen, rlen;
1107 const short chan2freq[14] = {
1108 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1109 2447, 2452, 2457, 2462, 2467, 2472, 2484
1110 };
1111
1112 mode = os_zalloc(sizeof(struct hostapd_hw_modes));
1113 if (mode == NULL)
1114 return NULL;
1115
1116 *num_modes = 1;
1117 *flags = 0;
1118 *dfs = 0;
1119
1120 mode->mode = HOSTAPD_MODE_IEEE80211B;
1121 mode->num_channels = 14;
1122 mode->num_rates = 4;
1123
1124 clen = mode->num_channels * sizeof(struct hostapd_channel_data);
1125 rlen = mode->num_rates * sizeof(int);
1126
1127 mode->channels = os_zalloc(clen);
1128 mode->rates = os_zalloc(rlen);
1129 if (mode->channels == NULL || mode->rates == NULL) {
1130 os_free(mode->channels);
1131 os_free(mode->rates);
1132 os_free(mode);
1133 return NULL;
1134 }
1135
1136 for (i = 0; i < 14; i++) {
1137 mode->channels[i].chan = i + 1;
1138 mode->channels[i].freq = chan2freq[i];
1139 mode->channels[i].allowed_bw = HOSTAPD_CHAN_WIDTH_20;
1140 /* TODO: Get allowed channel list from the driver */
1141 if (i >= 11)
1142 mode->channels[i].flag = HOSTAPD_CHAN_DISABLED;
1143 }
1144
1145 mode->rates[0] = 10;
1146 mode->rates[1] = 20;
1147 mode->rates[2] = 55;
1148 mode->rates[3] = 110;
1149
1150 return mode;
1151 }
1152
1153
wpa_driver_hostap_poll_client(void * priv,const u8 * own_addr,const u8 * addr,int qos)1154 static void wpa_driver_hostap_poll_client(void *priv, const u8 *own_addr,
1155 const u8 *addr, int qos)
1156 {
1157 struct ieee80211_hdr hdr;
1158
1159 os_memset(&hdr, 0, sizeof(hdr));
1160
1161 /*
1162 * WLAN_FC_STYPE_NULLFUNC would be more appropriate,
1163 * but it is apparently not retried so TX Exc events
1164 * are not received for it.
1165 * This is the reason the driver overrides the default
1166 * handling.
1167 */
1168 hdr.frame_control = IEEE80211_FC(WLAN_FC_TYPE_DATA,
1169 WLAN_FC_STYPE_DATA);
1170
1171 hdr.frame_control |=
1172 host_to_le16(WLAN_FC_FROMDS);
1173 os_memcpy(hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN);
1174 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
1175 os_memcpy(hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
1176
1177 hostap_send_mlme(priv, (u8 *)&hdr, sizeof(hdr), 0, 0, NULL, 0, 0, 0,
1178 -1);
1179 }
1180
1181
1182 const struct wpa_driver_ops wpa_driver_hostap_ops = {
1183 .name = "hostap",
1184 .desc = "Host AP driver (Intersil Prism2/2.5/3)",
1185 .set_key = wpa_driver_hostap_set_key,
1186 .hapd_init = hostap_init,
1187 .hapd_deinit = hostap_driver_deinit,
1188 .set_ieee8021x = hostap_set_ieee8021x,
1189 .set_privacy = hostap_set_privacy,
1190 .get_seqnum = hostap_get_seqnum,
1191 .flush = hostap_flush,
1192 .set_generic_elem = hostap_set_generic_elem,
1193 .read_sta_data = hostap_read_sta_data,
1194 .hapd_send_eapol = hostap_send_eapol,
1195 .sta_set_flags = hostap_sta_set_flags,
1196 .sta_deauth = hostap_sta_deauth,
1197 .sta_disassoc = hostap_sta_disassoc,
1198 .sta_remove = hostap_sta_remove,
1199 .hapd_set_ssid = hostap_set_ssid,
1200 .send_mlme = hostap_send_mlme,
1201 .sta_add = hostap_sta_add,
1202 .get_inact_sec = hostap_get_inact_sec,
1203 .sta_clear_stats = hostap_sta_clear_stats,
1204 .get_hw_feature_data = hostap_get_hw_feature_data,
1205 .set_ap_wps_ie = hostap_set_ap_wps_ie,
1206 .set_freq = hostap_set_freq,
1207 .poll_client = wpa_driver_hostap_poll_client,
1208 };
1209