2 * WPA Supplicant - driver interaction with Linux Host AP driver
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
16 #include <sys/ioctl.h>
18 #include "wireless_copy.h"
21 #include "driver_wext.h"
23 #include "driver_hostap.h"
24 #include "l2_packet.h"
25 #include "wpa_supplicant.h"
28 struct wpa_driver_hostap_data {
29 void *wext; /* private data for driver_wext */
31 char ifname[IFNAMSIZ + 1];
33 int current_mode; /* infra/adhoc */
37 static int hostapd_ioctl(struct wpa_driver_hostap_data *drv,
38 struct prism2_hostapd_param *param,
39 int len, int show_err)
43 os_memset(&iwr, 0, sizeof(iwr));
44 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
45 iwr.u.data.pointer = (caddr_t) param;
46 iwr.u.data.length = len;
48 if (ioctl(drv->sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
51 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
59 static int wpa_driver_hostap_set_wpa_ie(struct wpa_driver_hostap_data *drv,
60 const u8 *wpa_ie, size_t wpa_ie_len)
62 struct prism2_hostapd_param *param;
64 size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
65 if (blen < sizeof(*param))
66 blen = sizeof(*param);
68 param = os_zalloc(blen);
72 param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
73 param->u.generic_elem.len = wpa_ie_len;
74 os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
75 res = hostapd_ioctl(drv, param, blen, 1);
83 static int prism2param(struct wpa_driver_hostap_data *drv, int param,
89 os_memset(&iwr, 0, sizeof(iwr));
90 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
91 i = (int *) iwr.u.name;
95 if (ioctl(drv->sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
96 perror("ioctl[PRISM2_IOCTL_PRISM2_PARAM]");
103 static int wpa_driver_hostap_set_wpa(void *priv, int enabled)
105 struct wpa_driver_hostap_data *drv = priv;
108 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
110 if (!enabled && wpa_driver_hostap_set_wpa_ie(drv, NULL, 0) < 0)
112 if (prism2param(drv, PRISM2_PARAM_HOST_ROAMING, enabled ? 2 : 0) < 0)
114 if (prism2param(drv, PRISM2_PARAM_WPA, enabled) < 0)
121 static void show_set_key_error(struct prism2_hostapd_param *param)
123 switch (param->u.crypt.err) {
124 case HOSTAP_CRYPT_ERR_UNKNOWN_ALG:
125 wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
127 wpa_printf(MSG_INFO, "You may need to load kernel module to "
128 "register that algorithm.");
129 wpa_printf(MSG_INFO, "E.g., 'modprobe hostap_crypt_wep' for "
132 case HOSTAP_CRYPT_ERR_UNKNOWN_ADDR:
133 wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
134 MAC2STR(param->sta_addr));
136 case HOSTAP_CRYPT_ERR_CRYPT_INIT_FAILED:
137 wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
139 case HOSTAP_CRYPT_ERR_KEY_SET_FAILED:
140 wpa_printf(MSG_INFO, "Key setting failed.");
142 case HOSTAP_CRYPT_ERR_TX_KEY_SET_FAILED:
143 wpa_printf(MSG_INFO, "TX key index setting failed.");
145 case HOSTAP_CRYPT_ERR_CARD_CONF_FAILED:
146 wpa_printf(MSG_INFO, "Card configuration failed.");
152 static int wpa_driver_hostap_set_key(void *priv, wpa_alg alg,
153 const u8 *addr, int key_idx,
154 int set_tx, const u8 *seq, size_t seq_len,
155 const u8 *key, size_t key_len)
157 struct wpa_driver_hostap_data *drv = priv;
158 struct prism2_hostapd_param *param;
181 wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
182 "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
183 (unsigned long) seq_len, (unsigned long) key_len);
188 blen = sizeof(*param) + key_len;
189 buf = os_zalloc(blen);
193 param = (struct prism2_hostapd_param *) buf;
194 param->cmd = PRISM2_SET_ENCRYPTION;
195 /* TODO: In theory, STA in client mode can use five keys; four default
196 * keys for receiving (with keyidx 0..3) and one individual key for
197 * both transmitting and receiving (keyidx 0) _unicast_ packets. Now,
198 * keyidx 0 is reserved for this unicast use and default keys can only
199 * use keyidx 1..3 (i.e., default key with keyidx 0 is not supported).
200 * This should be fine for more or less all cases, but for completeness
201 * sake, the driver could be enhanced to support the missing key. */
204 os_memset(param->sta_addr, 0xff, ETH_ALEN);
206 os_memcpy(param->sta_addr, addr, ETH_ALEN);
208 os_memset(param->sta_addr, 0xff, ETH_ALEN);
210 os_strncpy((char *) param->u.crypt.alg, alg_name,
211 HOSTAP_CRYPT_ALG_NAME_LEN);
212 param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
213 param->u.crypt.idx = key_idx;
214 os_memcpy(param->u.crypt.seq, seq, seq_len);
215 param->u.crypt.key_len = key_len;
216 os_memcpy((u8 *) (param + 1), key, key_len);
218 if (hostapd_ioctl(drv, param, blen, 1)) {
219 wpa_printf(MSG_WARNING, "Failed to set encryption.");
220 show_set_key_error(param);
229 static int wpa_driver_hostap_set_countermeasures(void *priv, int enabled)
231 struct wpa_driver_hostap_data *drv = priv;
232 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
233 return prism2param(drv, PRISM2_PARAM_TKIP_COUNTERMEASURES, enabled);
237 static int wpa_driver_hostap_set_drop_unencrypted(void *priv, int enabled)
239 struct wpa_driver_hostap_data *drv = priv;
240 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
241 return prism2param(drv, PRISM2_PARAM_DROP_UNENCRYPTED, enabled);
245 static int wpa_driver_hostap_reset(struct wpa_driver_hostap_data *drv,
251 wpa_printf(MSG_DEBUG, "%s: type=%d", __FUNCTION__, type);
253 os_memset(&iwr, 0, sizeof(iwr));
254 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
255 i = (int *) iwr.u.name;
258 if (ioctl(drv->sock, PRISM2_IOCTL_RESET, &iwr) < 0) {
259 perror("ioctl[PRISM2_IOCTL_RESET]");
266 static int wpa_driver_hostap_mlme(struct wpa_driver_hostap_data *drv,
267 const u8 *addr, int cmd, int reason_code)
269 struct prism2_hostapd_param param;
272 /* There does not seem to be a better way of deauthenticating or
273 * disassociating with Prism2/2.5/3 than sending the management frame
274 * and then resetting the Port0 to make sure both the AP and the STA
275 * end up in disconnected state. */
276 os_memset(¶m, 0, sizeof(param));
277 param.cmd = PRISM2_HOSTAPD_MLME;
278 os_memcpy(param.sta_addr, addr, ETH_ALEN);
279 param.u.mlme.cmd = cmd;
280 param.u.mlme.reason_code = reason_code;
281 ret = hostapd_ioctl(drv, ¶m, sizeof(param), 1);
284 ret = wpa_driver_hostap_reset(drv, 2);
290 static int wpa_driver_hostap_deauthenticate(void *priv, const u8 *addr,
293 struct wpa_driver_hostap_data *drv = priv;
294 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
295 return wpa_driver_hostap_mlme(drv, addr, MLME_STA_DEAUTH,
300 static int wpa_driver_hostap_disassociate(void *priv, const u8 *addr,
303 struct wpa_driver_hostap_data *drv = priv;
304 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
305 return wpa_driver_hostap_mlme(drv, addr, MLME_STA_DISASSOC,
311 wpa_driver_hostap_associate(void *priv,
312 struct wpa_driver_associate_params *params)
314 struct wpa_driver_hostap_data *drv = priv;
316 int allow_unencrypted_eapol;
318 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
320 if (params->mode != drv->current_mode) {
321 /* At the moment, Host AP driver requires host_roaming=2 for
322 * infrastructure mode and host_roaming=0 for adhoc. */
323 if (prism2param(drv, PRISM2_PARAM_HOST_ROAMING,
324 params->mode == IEEE80211_MODE_IBSS ? 0 : 2) <
326 wpa_printf(MSG_DEBUG, "%s: failed to set host_roaming",
329 drv->current_mode = params->mode;
332 if (prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
333 params->key_mgmt_suite != KEY_MGMT_NONE) < 0)
335 if (wpa_driver_hostap_set_wpa_ie(drv, params->wpa_ie,
336 params->wpa_ie_len) < 0)
338 if (wpa_driver_wext_set_mode(drv->wext, params->mode) < 0)
341 wpa_driver_wext_set_freq(drv->wext, params->freq) < 0)
343 if (wpa_driver_wext_set_ssid(drv->wext, params->ssid, params->ssid_len)
346 if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
349 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
350 * not using WPA. IEEE 802.1X specifies that these frames are not
351 * encrypted, but WPA encrypts them when pairwise keys are in use. */
352 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
353 params->key_mgmt_suite == KEY_MGMT_PSK)
354 allow_unencrypted_eapol = 0;
356 allow_unencrypted_eapol = 1;
358 if (prism2param(drv, PRISM2_PARAM_IEEE_802_1X,
359 allow_unencrypted_eapol) < 0) {
360 wpa_printf(MSG_DEBUG, "hostap: Failed to configure "
361 "ieee_802_1x param");
362 /* Ignore this error.. driver_hostap.c can also be used with
363 * other drivers that do not support this prism2_param. */
370 static int wpa_driver_hostap_scan(void *priv, const u8 *ssid, size_t ssid_len)
372 struct wpa_driver_hostap_data *drv = priv;
373 struct prism2_hostapd_param param;
377 /* Use standard Linux Wireless Extensions ioctl if possible
378 * because some drivers using hostap code in wpa_supplicant
379 * might not support Host AP specific scan request (with SSID
381 return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
387 os_memset(¶m, 0, sizeof(param));
388 param.cmd = PRISM2_HOSTAPD_SCAN_REQ;
389 param.u.scan_req.ssid_len = ssid_len;
390 os_memcpy(param.u.scan_req.ssid, ssid, ssid_len);
391 ret = hostapd_ioctl(drv, ¶m, sizeof(param), 1);
393 /* Not all drivers generate "scan completed" wireless event, so try to
394 * read results after a timeout. */
395 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv->wext,
397 eloop_register_timeout(3, 0, wpa_driver_wext_scan_timeout, drv->wext,
404 static int wpa_driver_hostap_set_auth_alg(void *priv, int auth_alg)
406 struct wpa_driver_hostap_data *drv = priv;
409 if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
411 if (auth_alg & AUTH_ALG_SHARED_KEY)
413 if (auth_alg & AUTH_ALG_LEAP)
416 algs = 1; /* at least one algorithm should be set */
418 return prism2param(drv, PRISM2_PARAM_AP_AUTH_ALGS, algs);
422 static int wpa_driver_hostap_get_bssid(void *priv, u8 *bssid)
424 struct wpa_driver_hostap_data *drv = priv;
425 return wpa_driver_wext_get_bssid(drv->wext, bssid);
429 static int wpa_driver_hostap_get_ssid(void *priv, u8 *ssid)
431 struct wpa_driver_hostap_data *drv = priv;
432 return wpa_driver_wext_get_ssid(drv->wext, ssid);
436 static int wpa_driver_hostap_get_scan_results(void *priv,
437 struct wpa_scan_result *results,
440 struct wpa_driver_hostap_data *drv = priv;
441 return wpa_driver_wext_get_scan_results(drv->wext, results, max_size);
445 static int wpa_driver_hostap_set_operstate(void *priv, int state)
447 struct wpa_driver_hostap_data *drv = priv;
448 return wpa_driver_wext_set_operstate(drv->wext, state);
452 static void * wpa_driver_hostap_init(void *ctx, const char *ifname)
454 struct wpa_driver_hostap_data *drv;
456 drv = os_zalloc(sizeof(*drv));
459 drv->wext = wpa_driver_wext_init(ctx, ifname);
460 if (drv->wext == NULL) {
466 os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
467 drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
470 wpa_driver_wext_deinit(drv->wext);
475 if (os_strncmp(ifname, "wlan", 4) == 0) {
477 * Host AP driver may use both wlan# and wifi# interface in
480 char ifname2[IFNAMSIZ + 1];
481 os_strncpy(ifname2, ifname, sizeof(ifname2));
482 os_memcpy(ifname2, "wifi", 4);
483 wpa_driver_wext_alternative_ifindex(drv->wext, ifname2);
490 static void wpa_driver_hostap_deinit(void *priv)
492 struct wpa_driver_hostap_data *drv = priv;
493 wpa_driver_wext_deinit(drv->wext);
499 const struct wpa_driver_ops wpa_driver_hostap_ops = {
501 .desc = "Host AP driver (Intersil Prism2/2.5/3)",
502 .get_bssid = wpa_driver_hostap_get_bssid,
503 .get_ssid = wpa_driver_hostap_get_ssid,
504 .set_wpa = wpa_driver_hostap_set_wpa,
505 .set_key = wpa_driver_hostap_set_key,
506 .set_countermeasures = wpa_driver_hostap_set_countermeasures,
507 .set_drop_unencrypted = wpa_driver_hostap_set_drop_unencrypted,
508 .scan = wpa_driver_hostap_scan,
509 .get_scan_results = wpa_driver_hostap_get_scan_results,
510 .deauthenticate = wpa_driver_hostap_deauthenticate,
511 .disassociate = wpa_driver_hostap_disassociate,
512 .associate = wpa_driver_hostap_associate,
513 .set_auth_alg = wpa_driver_hostap_set_auth_alg,
514 .init = wpa_driver_hostap_init,
515 .deinit = wpa_driver_hostap_deinit,
516 .set_operstate = wpa_driver_hostap_set_operstate,