1 /*
2 * WPA Supplicant - driver interaction with Linux ipw2100/2200 drivers
3 * Copyright (c) 2005 Zhu Yi <yi.zhu@intel.com>
4 * Copyright (c) 2004 Lubomir Gelo <lgelo@cnc.sk>
5 * Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Alternatively, this software may be distributed under the terms of BSD
12 * license.
13 *
14 * See README and COPYING for more details.
15 *
16 * Please note that ipw2100/2200 drivers change to use generic Linux wireless
17 * extensions if the kernel includes support for WE-18 or newer (Linux 2.6.13
18 * or newer). driver_wext.c should be used in those cases.
19 */
20
21 #include "includes.h"
22 #include <sys/ioctl.h>
23
24 #include "wireless_copy.h"
25 #include "common.h"
26 #include "driver.h"
27 #include "driver_wext.h"
28
29 struct wpa_driver_ipw_data {
30 void *wext; /* private data for driver_wext */
31 void *ctx;
32 char ifname[IFNAMSIZ + 1];
33 int sock;
34 };
35
36 /* following definitions must be kept in sync with ipw2100.c and ipw2200.c */
37
38 #define IPW_IOCTL_WPA_SUPPLICANT SIOCIWFIRSTPRIV+30
39
40 #define IPW_CMD_SET_WPA_PARAM 1
41 #define IPW_CMD_SET_WPA_IE 2
42 #define IPW_CMD_SET_ENCRYPTION 3
43 #define IPW_CMD_MLME 4
44
45 #define IPW_PARAM_WPA_ENABLED 1
46 #define IPW_PARAM_TKIP_COUNTERMEASURES 2
47 #define IPW_PARAM_DROP_UNENCRYPTED 3
48 #define IPW_PARAM_PRIVACY_INVOKED 4
49 #define IPW_PARAM_AUTH_ALGS 5
50 #define IPW_PARAM_IEEE_802_1X 6
51
52 #define IPW_MLME_STA_DEAUTH 1
53 #define IPW_MLME_STA_DISASSOC 2
54
55 #define IPW_CRYPT_ERR_UNKNOWN_ALG 2
56 #define IPW_CRYPT_ERR_UNKNOWN_ADDR 3
57 #define IPW_CRYPT_ERR_CRYPT_INIT_FAILED 4
58 #define IPW_CRYPT_ERR_KEY_SET_FAILED 5
59 #define IPW_CRYPT_ERR_TX_KEY_SET_FAILED 6
60 #define IPW_CRYPT_ERR_CARD_CONF_FAILED 7
61
62 #define IPW_CRYPT_ALG_NAME_LEN 16
63
64 struct ipw_param {
65 u32 cmd;
66 u8 sta_addr[ETH_ALEN];
67 union {
68 struct {
69 u8 name;
70 u32 value;
71 } wpa_param;
72 struct {
73 u32 len;
74 u8 reserved[32];
75 u8 data[0];
76 } wpa_ie;
77 struct{
78 u32 command;
79 u32 reason_code;
80 } mlme;
81 struct {
82 u8 alg[IPW_CRYPT_ALG_NAME_LEN];
83 u8 set_tx;
84 u32 err;
85 u8 idx;
86 u8 seq[8];
87 u16 key_len;
88 u8 key[0];
89 } crypt;
90
91 } u;
92 };
93
94 /* end of ipw2100.c and ipw2200.c code */
95
ipw_ioctl(struct wpa_driver_ipw_data * drv,struct ipw_param * param,int len,int show_err)96 static int ipw_ioctl(struct wpa_driver_ipw_data *drv,
97 struct ipw_param *param, int len, int show_err)
98 {
99 struct iwreq iwr;
100
101 os_memset(&iwr, 0, sizeof(iwr));
102 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
103 iwr.u.data.pointer = (caddr_t) param;
104 iwr.u.data.length = len;
105
106 if (ioctl(drv->sock, IPW_IOCTL_WPA_SUPPLICANT, &iwr) < 0) {
107 int ret = errno;
108 if (show_err)
109 perror("ioctl[IPW_IOCTL_WPA_SUPPLICANT]");
110 return ret;
111 }
112
113 return 0;
114 }
115
116
ipw_show_set_key_error(struct ipw_param * param)117 static void ipw_show_set_key_error(struct ipw_param *param)
118 {
119 switch (param->u.crypt.err) {
120 case IPW_CRYPT_ERR_UNKNOWN_ALG:
121 wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
122 param->u.crypt.alg);
123 wpa_printf(MSG_INFO, "You may need to load kernel module to "
124 "register that algorithm.");
125 wpa_printf(MSG_INFO, "E.g., 'modprobe ieee80211_crypt_wep' for"
126 " WEP.");
127 break;
128 case IPW_CRYPT_ERR_UNKNOWN_ADDR:
129 wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
130 MAC2STR(param->sta_addr));
131 break;
132 case IPW_CRYPT_ERR_CRYPT_INIT_FAILED:
133 wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
134 break;
135 case IPW_CRYPT_ERR_KEY_SET_FAILED:
136 wpa_printf(MSG_INFO, "Key setting failed.");
137 break;
138 case IPW_CRYPT_ERR_TX_KEY_SET_FAILED:
139 wpa_printf(MSG_INFO, "TX key index setting failed.");
140 break;
141 case IPW_CRYPT_ERR_CARD_CONF_FAILED:
142 wpa_printf(MSG_INFO, "Card configuration failed.");
143 break;
144 }
145 }
146
147
ipw_set_wpa_ie(struct wpa_driver_ipw_data * drv,const u8 * wpa_ie,size_t wpa_ie_len)148 static int ipw_set_wpa_ie(struct wpa_driver_ipw_data *drv,
149 const u8 *wpa_ie, size_t wpa_ie_len)
150 {
151 struct ipw_param *param;
152 int ret;
153 size_t blen = sizeof(*param) + wpa_ie_len;
154
155 param = os_zalloc(blen);
156 if (param == NULL)
157 return -1;
158
159 param->cmd = IPW_CMD_SET_WPA_IE;
160 param->u.wpa_ie.len = wpa_ie_len;
161 os_memcpy(param->u.wpa_ie.data, wpa_ie, wpa_ie_len);
162
163 ret = ipw_ioctl(drv, param, blen, 1);
164
165 os_free(param);
166 return ret;
167 }
168
169
ipw_set_wpa_param(struct wpa_driver_ipw_data * drv,u8 name,u32 value)170 static int ipw_set_wpa_param(struct wpa_driver_ipw_data *drv, u8 name,
171 u32 value)
172 {
173 struct ipw_param param;
174
175 os_memset(¶m, 0, sizeof(param));
176 param.cmd = IPW_CMD_SET_WPA_PARAM;
177 param.u.wpa_param.name = name;
178 param.u.wpa_param.value = value;
179
180 return ipw_ioctl(drv, ¶m, sizeof(param), 1);
181 }
182
183
ipw_mlme(struct wpa_driver_ipw_data * drv,const u8 * addr,int cmd,int reason)184 static int ipw_mlme(struct wpa_driver_ipw_data *drv, const u8 *addr,
185 int cmd, int reason)
186 {
187 struct ipw_param param;
188
189 os_memset(¶m, 0, sizeof(param));
190 os_memcpy(param.sta_addr, addr, ETH_ALEN);
191 param.cmd = IPW_CMD_MLME;
192 param.u.mlme.command = cmd;
193 param.u.mlme.reason_code = reason;
194
195 return ipw_ioctl(drv, ¶m, sizeof(param), 1);
196 }
197
198
wpa_driver_ipw_set_wpa(void * priv,int enabled)199 static int wpa_driver_ipw_set_wpa(void *priv, int enabled)
200 {
201 struct wpa_driver_ipw_data *drv = priv;
202 int ret = 0;
203
204 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
205
206 if (!enabled && ipw_set_wpa_ie(drv, NULL, 0) < 0)
207 ret = -1;
208
209 if (ipw_set_wpa_param(drv, IPW_PARAM_WPA_ENABLED, enabled) < 0)
210 ret = -1;
211
212 return ret;
213 }
214
215
wpa_driver_ipw_set_key(void * priv,wpa_alg alg,const u8 * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len)216 static int wpa_driver_ipw_set_key(void *priv, wpa_alg alg,
217 const u8 *addr, int key_idx, int set_tx,
218 const u8 *seq, size_t seq_len,
219 const u8 *key, size_t key_len)
220 {
221 struct wpa_driver_ipw_data *drv = priv;
222 struct ipw_param *param;
223 u8 *buf;
224 size_t blen;
225 int ret = 0;
226 char *alg_name;
227
228 switch (alg) {
229 case WPA_ALG_NONE:
230 alg_name = "none";
231 break;
232 case WPA_ALG_WEP:
233 alg_name = "WEP";
234 break;
235 case WPA_ALG_TKIP:
236 alg_name = "TKIP";
237 break;
238 case WPA_ALG_CCMP:
239 alg_name = "CCMP";
240 break;
241 default:
242 return -1;
243 }
244
245 wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
246 "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
247 (unsigned long) seq_len, (unsigned long) key_len);
248
249 if (seq_len > 8)
250 return -2;
251
252 blen = sizeof(*param) + key_len;
253 buf = os_zalloc(blen);
254 if (buf == NULL)
255 return -1;
256
257 param = (struct ipw_param *) buf;
258 param->cmd = IPW_CMD_SET_ENCRYPTION;
259 os_memset(param->sta_addr, 0xff, ETH_ALEN);
260 os_strlcpy((char *) param->u.crypt.alg, alg_name,
261 IPW_CRYPT_ALG_NAME_LEN);
262 param->u.crypt.set_tx = set_tx ? 1 : 0;
263 param->u.crypt.idx = key_idx;
264 os_memcpy(param->u.crypt.seq, seq, seq_len);
265 param->u.crypt.key_len = key_len;
266 os_memcpy((u8 *) (param + 1), key, key_len);
267
268 if (ipw_ioctl(drv, param, blen, 1)) {
269 wpa_printf(MSG_WARNING, "Failed to set encryption.");
270 ipw_show_set_key_error(param);
271 ret = -1;
272 }
273 os_free(buf);
274
275 return ret;
276 }
277
278
wpa_driver_ipw_set_countermeasures(void * priv,int enabled)279 static int wpa_driver_ipw_set_countermeasures(void *priv, int enabled)
280 {
281 struct wpa_driver_ipw_data *drv = priv;
282 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
283 return ipw_set_wpa_param(drv, IPW_PARAM_TKIP_COUNTERMEASURES,
284 enabled);
285
286 }
287
288
wpa_driver_ipw_set_drop_unencrypted(void * priv,int enabled)289 static int wpa_driver_ipw_set_drop_unencrypted(void *priv, int enabled)
290 {
291 struct wpa_driver_ipw_data *drv = priv;
292 wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
293 return ipw_set_wpa_param(drv, IPW_PARAM_DROP_UNENCRYPTED,
294 enabled);
295 }
296
297
wpa_driver_ipw_deauthenticate(void * priv,const u8 * addr,int reason_code)298 static int wpa_driver_ipw_deauthenticate(void *priv, const u8 *addr,
299 int reason_code)
300 {
301 struct wpa_driver_ipw_data *drv = priv;
302 return ipw_mlme(drv, addr, IPW_MLME_STA_DEAUTH, reason_code);
303 }
304
305
wpa_driver_ipw_disassociate(void * priv,const u8 * addr,int reason_code)306 static int wpa_driver_ipw_disassociate(void *priv, const u8 *addr,
307 int reason_code)
308 {
309 struct wpa_driver_ipw_data *drv = priv;
310 return ipw_mlme(drv, addr, IPW_MLME_STA_DISASSOC, reason_code);
311 }
312
313
314 static int
wpa_driver_ipw_associate(void * priv,struct wpa_driver_associate_params * params)315 wpa_driver_ipw_associate(void *priv, struct wpa_driver_associate_params *params)
316 {
317 struct wpa_driver_ipw_data *drv = priv;
318 int ret = 0;
319 int unencrypted_eapol;
320
321 if (ipw_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0)
322 ret = -1;
323 if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
324 params->ssid_len) < 0)
325 ret = -1;
326 if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
327 ret = -1;
328
329 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
330 params->key_mgmt_suite == KEY_MGMT_PSK)
331 unencrypted_eapol = 0;
332 else
333 unencrypted_eapol = 1;
334
335 if (ipw_set_wpa_param(drv, IPW_PARAM_IEEE_802_1X,
336 unencrypted_eapol) < 0) {
337 wpa_printf(MSG_DEBUG, "ipw: Failed to configure "
338 "ieee_802_1x param");
339 }
340
341 return ret;
342 }
343
344
wpa_driver_ipw_set_auth_alg(void * priv,int auth_alg)345 static int wpa_driver_ipw_set_auth_alg(void *priv, int auth_alg)
346 {
347 struct wpa_driver_ipw_data *drv = priv;
348 int algs = 0;
349
350 if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
351 algs |= 1;
352 if (auth_alg & AUTH_ALG_SHARED_KEY)
353 algs |= 2;
354 if (auth_alg & AUTH_ALG_LEAP)
355 algs |= 4;
356 if (algs == 0)
357 algs = 1; /* at least one algorithm should be set */
358
359 wpa_printf(MSG_DEBUG, "%s: auth_alg=0x%x", __FUNCTION__, algs);
360 return ipw_set_wpa_param(drv, IPW_PARAM_AUTH_ALGS, algs);
361 }
362
363
wpa_driver_ipw_get_bssid(void * priv,u8 * bssid)364 static int wpa_driver_ipw_get_bssid(void *priv, u8 *bssid)
365 {
366 struct wpa_driver_ipw_data *drv = priv;
367 return wpa_driver_wext_get_bssid(drv->wext, bssid);
368 }
369
370
wpa_driver_ipw_get_ssid(void * priv,u8 * ssid)371 static int wpa_driver_ipw_get_ssid(void *priv, u8 *ssid)
372 {
373 struct wpa_driver_ipw_data *drv = priv;
374 return wpa_driver_wext_get_ssid(drv->wext, ssid);
375 }
376
377
wpa_driver_ipw_scan(void * priv,const u8 * ssid,size_t ssid_len)378 static int wpa_driver_ipw_scan(void *priv, const u8 *ssid, size_t ssid_len)
379 {
380 struct wpa_driver_ipw_data *drv = priv;
381 return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
382 }
383
384
wpa_driver_ipw_get_scan_results(void * priv)385 static struct wpa_scan_results * wpa_driver_ipw_get_scan_results(void *priv)
386 {
387 struct wpa_driver_ipw_data *drv = priv;
388 return wpa_driver_wext_get_scan_results(drv->wext);
389 }
390
391
wpa_driver_ipw_set_operstate(void * priv,int state)392 static int wpa_driver_ipw_set_operstate(void *priv, int state)
393 {
394 struct wpa_driver_ipw_data *drv = priv;
395 return wpa_driver_wext_set_operstate(drv->wext, state);
396 }
397
398
wpa_driver_ipw_init(void * ctx,const char * ifname)399 static void * wpa_driver_ipw_init(void *ctx, const char *ifname)
400 {
401 struct wpa_driver_ipw_data *drv;
402 int ver;
403
404 wpa_printf(MSG_DEBUG, "%s is called", __FUNCTION__);
405 drv = os_zalloc(sizeof(*drv));
406 if (drv == NULL)
407 return NULL;
408 drv->wext = wpa_driver_wext_init(ctx, ifname);
409 if (drv->wext == NULL) {
410 os_free(drv);
411 return NULL;
412 }
413
414 ver = wpa_driver_wext_get_version(drv->wext);
415 if (ver >= 18) {
416 wpa_printf(MSG_WARNING, "Linux wireless extensions version %d "
417 "detected.", ver);
418 wpa_printf(MSG_WARNING, "ipw2x00 driver uses driver_wext "
419 "(-Dwext) instead of driver_ipw.");
420 }
421
422 drv->ctx = ctx;
423 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
424 drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
425 if (drv->sock < 0) {
426 wpa_driver_wext_deinit(drv->wext);
427 os_free(drv);
428 return NULL;
429 }
430
431 return drv;
432 }
433
434
wpa_driver_ipw_deinit(void * priv)435 static void wpa_driver_ipw_deinit(void *priv)
436 {
437 struct wpa_driver_ipw_data *drv = priv;
438 wpa_driver_wext_deinit(drv->wext);
439 close(drv->sock);
440 os_free(drv);
441 }
442
443
444 const struct wpa_driver_ops wpa_driver_ipw_ops = {
445 .name = "ipw",
446 .desc = "Intel ipw2100/2200 driver (old; use wext with Linux 2.6.13 "
447 "or newer)",
448 .get_bssid = wpa_driver_ipw_get_bssid,
449 .get_ssid = wpa_driver_ipw_get_ssid,
450 .set_wpa = wpa_driver_ipw_set_wpa,
451 .set_key = wpa_driver_ipw_set_key,
452 .set_countermeasures = wpa_driver_ipw_set_countermeasures,
453 .set_drop_unencrypted = wpa_driver_ipw_set_drop_unencrypted,
454 .scan = wpa_driver_ipw_scan,
455 .get_scan_results2 = wpa_driver_ipw_get_scan_results,
456 .deauthenticate = wpa_driver_ipw_deauthenticate,
457 .disassociate = wpa_driver_ipw_disassociate,
458 .associate = wpa_driver_ipw_associate,
459 .set_auth_alg = wpa_driver_ipw_set_auth_alg,
460 .init = wpa_driver_ipw_init,
461 .deinit = wpa_driver_ipw_deinit,
462 .set_operstate = wpa_driver_ipw_set_operstate,
463 };
464