src/drivers/driver_ndiswrapper.c

   1 /*
   2  * WPA Supplicant - driver interaction with Linux ndiswrapper
   3  * Copyright (c) 2004-2006, Giridhar Pemmasani <giri@lmc.cs.sunysb.edu>
   4  * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17 #include <sys/ioctl.h>
  18
  19 #include "wireless_copy.h"
  20 #include "common.h"
  21 #include "driver.h"
  22 #include "driver_wext.h"
  23
  24 struct wpa_driver_ndiswrapper_data {
  25         void *wext; /* private data for driver_wext */
  26         void *ctx;
  27         char ifname[IFNAMSIZ + 1];
  28         int sock;
  29 };
  30
  31
  32 struct wpa_key
  33 {
  34         wpa_alg alg;
  35         const u8 *addr;
  36         int key_index;
  37         int set_tx;
  38         const u8 *seq;
  39         size_t seq_len;
  40         const u8 *key;
  41         size_t key_len;
  42 };
  43
  44 struct wpa_assoc_info
  45 {
  46         const u8 *bssid;
  47         const u8 *ssid;
  48         size_t ssid_len;
  49         int freq;
  50         const u8 *wpa_ie;
  51         size_t wpa_ie_len;
  52         wpa_cipher pairwise_suite;
  53         wpa_cipher group_suite;
  54         wpa_key_mgmt key_mgmt_suite;
  55         int auth_alg;
  56         int mode;
  57 };
  58
  59 #define PRIV_RESET                      SIOCIWFIRSTPRIV+0
  60 #define WPA_SET_WPA                     SIOCIWFIRSTPRIV+1
  61 #define WPA_SET_KEY                     SIOCIWFIRSTPRIV+2
  62 #define WPA_ASSOCIATE                   SIOCIWFIRSTPRIV+3
  63 #define WPA_DISASSOCIATE                SIOCIWFIRSTPRIV+4
  64 #define WPA_DROP_UNENCRYPTED            SIOCIWFIRSTPRIV+5
  65 #define WPA_SET_COUNTERMEASURES         SIOCIWFIRSTPRIV+6
  66 #define WPA_DEAUTHENTICATE              SIOCIWFIRSTPRIV+7
  67 #define WPA_SET_AUTH_ALG                SIOCIWFIRSTPRIV+8
  68 #define WPA_INIT                        SIOCIWFIRSTPRIV+9
  69 #define WPA_DEINIT                      SIOCIWFIRSTPRIV+10
  70 #define WPA_GET_CAPA                    SIOCIWFIRSTPRIV+11
  71
  72 static int get_socket(void)
  73 {
  74         static const int families[] = {
  75                 AF_INET, AF_IPX, AF_AX25, AF_APPLETALK
  76         };
  77         unsigned int i;
  78         int sock;
  79
  80         for (i = 0; i < sizeof(families) / sizeof(int); ++i) {
  81                 sock = socket(families[i], SOCK_DGRAM, 0);
  82                 if (sock >= 0)
  83                         return sock;
  84         }
  85
  86         return -1;
  87 }
  88
  89 static int iw_set_ext(struct wpa_driver_ndiswrapper_data *drv, int request,
  90                       struct iwreq *pwrq)
  91 {
  92         os_strlcpy(pwrq->ifr_name, drv->ifname, IFNAMSIZ);
  93         return ioctl(drv->sock, request, pwrq);
  94 }
  95
  96 static int wpa_ndiswrapper_set_wpa(void *priv, int enabled)
  97 {
  98         struct wpa_driver_ndiswrapper_data *drv = priv;
  99         struct iwreq priv_req;
 100         int ret = 0;
 101
 102         os_memset(&priv_req, 0, sizeof(priv_req));
 103
 104         priv_req.u.data.flags = enabled;
 105         if (iw_set_ext(drv, WPA_SET_WPA, &priv_req) < 0)
 106                 ret = -1;
 107         return ret;
 108 }
 109
 110 static int wpa_ndiswrapper_set_key(void *priv, wpa_alg alg, const u8 *addr,
 111                                    int key_idx, int set_tx,
 112                                    const u8 *seq, size_t seq_len,
 113                                    const u8 *key, size_t key_len)
 114 {
 115         struct wpa_driver_ndiswrapper_data *drv = priv;
 116         struct wpa_key wpa_key;
 117         int ret = 0;
 118         struct iwreq priv_req;
 119
 120         os_memset(&priv_req, 0, sizeof(priv_req));
 121
 122         wpa_key.alg = alg;
 123         wpa_key.addr = addr;
 124         wpa_key.key_index = key_idx;
 125         wpa_key.set_tx = set_tx;
 126         wpa_key.seq = seq;
 127         wpa_key.seq_len = seq_len;
 128         wpa_key.key = key;
 129         wpa_key.key_len = key_len;
 130
 131         priv_req.u.data.pointer = (void *)&wpa_key;
 132         priv_req.u.data.length = sizeof(wpa_key);
 133
 134         if (iw_set_ext(drv, WPA_SET_KEY, &priv_req) < 0)
 135                 ret = -1;
 136
 137         if (alg == WPA_ALG_NONE) {
 138                 /*
 139                  * ndiswrapper did not seem to be clearing keys properly in
 140                  * some cases with WPA_SET_KEY. For example, roaming from WPA
 141                  * enabled AP to plaintext one seemed to fail since the driver
 142                  * did not associate. Try to make sure the keys are cleared so
 143                  * that plaintext APs can be used in all cases.
 144                  */
 145                 wpa_driver_wext_set_key(drv->wext, alg, addr, key_idx, set_tx,
 146                                         seq, seq_len, key, key_len);
 147         }
 148
 149         return ret;
 150 }
 151
 152 static int wpa_ndiswrapper_set_countermeasures(void *priv, int enabled)
 153 {
 154         struct wpa_driver_ndiswrapper_data *drv = priv;
 155         int ret = 0;
 156         struct iwreq priv_req;
 157
 158         os_memset(&priv_req, 0, sizeof(priv_req));
 159
 160         priv_req.u.param.value = enabled;
 161         if (iw_set_ext(drv, WPA_SET_COUNTERMEASURES, &priv_req) < 0)
 162                 ret = -1;
 163
 164         return ret;
 165 }
 166
 167 static int wpa_ndiswrapper_set_drop_unencrypted(void *priv,
 168                                                 int enabled)
 169 {
 170         struct wpa_driver_ndiswrapper_data *drv = priv;
 171         int ret = 0;
 172         struct iwreq priv_req;
 173
 174         os_memset(&priv_req, 0, sizeof(priv_req));
 175
 176         priv_req.u.param.value = enabled;
 177         if (iw_set_ext(drv, WPA_DROP_UNENCRYPTED, &priv_req) < 0)
 178                 ret = -1;
 179         return ret;
 180 }
 181
 182 static int wpa_ndiswrapper_deauthenticate(void *priv, const u8 *addr,
 183                                           int reason_code)
 184 {
 185         struct wpa_driver_ndiswrapper_data *drv = priv;
 186         int ret = 0;
 187         struct iwreq priv_req;
 188
 189         os_memset(&priv_req, 0, sizeof(priv_req));
 190
 191         priv_req.u.param.value = reason_code;
 192         os_memcpy(&priv_req.u.ap_addr.sa_data, addr, ETH_ALEN);
 193         if (iw_set_ext(drv, WPA_DEAUTHENTICATE, &priv_req) < 0)
 194                 ret = -1;
 195         return ret;
 196 }
 197
 198 static int wpa_ndiswrapper_disassociate(void *priv, const u8 *addr,
 199                                         int reason_code)
 200 {
 201         struct wpa_driver_ndiswrapper_data *drv = priv;
 202         int ret = 0;
 203         struct iwreq priv_req;
 204
 205         os_memset(&priv_req, 0, sizeof(priv_req));
 206
 207         os_memcpy(&priv_req.u.ap_addr.sa_data, addr, ETH_ALEN);
 208         if (iw_set_ext(drv, WPA_DISASSOCIATE, &priv_req) < 0)
 209                 ret = -1;
 210         return ret;
 211 }
 212
 213 static int
 214 wpa_ndiswrapper_associate(void *priv,
 215                           struct wpa_driver_associate_params *params)
 216 {
 217         struct wpa_driver_ndiswrapper_data *drv = priv;
 218         int ret = 0;
 219         struct wpa_assoc_info wpa_assoc_info;
 220         struct iwreq priv_req;
 221
 222         os_memset(&priv_req, 0, sizeof(priv_req));
 223         os_memset(&wpa_assoc_info, 0, sizeof(wpa_assoc_info));
 224
 225         wpa_assoc_info.bssid = params->bssid;
 226         wpa_assoc_info.ssid = params->ssid;
 227         wpa_assoc_info.ssid_len = params->ssid_len;
 228         wpa_assoc_info.freq = params->freq;
 229         wpa_assoc_info.wpa_ie = params->wpa_ie;
 230         wpa_assoc_info.wpa_ie_len = params->wpa_ie_len;
 231         wpa_assoc_info.pairwise_suite = params->pairwise_suite;
 232         wpa_assoc_info.group_suite = params->group_suite;
 233         wpa_assoc_info.key_mgmt_suite = params->key_mgmt_suite;
 234         wpa_assoc_info.auth_alg = params->auth_alg;
 235         wpa_assoc_info.mode = params->mode;
 236
 237         priv_req.u.data.pointer = (void *)&wpa_assoc_info;
 238         priv_req.u.data.length = sizeof(wpa_assoc_info);
 239
 240         if (iw_set_ext(drv, WPA_ASSOCIATE, &priv_req) < 0)
 241                 ret = -1;
 242         return ret;
 243 }
 244
 245 static int wpa_ndiswrapper_set_auth_alg(void *priv, int auth_alg)
 246 {
 247         struct wpa_driver_ndiswrapper_data *drv = priv;
 248         int ret = 0;
 249         struct iwreq priv_req;
 250
 251         os_memset(&priv_req, 0, sizeof(priv_req));
 252
 253         priv_req.u.param.value = auth_alg;
 254         if (iw_set_ext(drv, WPA_SET_AUTH_ALG, &priv_req) < 0)
 255                 ret = -1;
 256         return ret;
 257 }
 258
 259 static int wpa_ndiswrapper_get_bssid(void *priv, u8 *bssid)
 260 {
 261         struct wpa_driver_ndiswrapper_data *drv = priv;
 262         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 263 }
 264
 265
 266 static int wpa_ndiswrapper_get_ssid(void *priv, u8 *ssid)
 267 {
 268         struct wpa_driver_ndiswrapper_data *drv = priv;
 269         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 270 }
 271
 272
 273 static int wpa_ndiswrapper_scan(void *priv, const u8 *ssid, size_t ssid_len)
 274 {
 275         struct wpa_driver_ndiswrapper_data *drv = priv;
 276         return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 277 }
 278
 279
 280 static struct wpa_scan_results * wpa_ndiswrapper_get_scan_results(void *priv)
 281 {
 282         struct wpa_driver_ndiswrapper_data *drv = priv;
 283         return wpa_driver_wext_get_scan_results(drv->wext);
 284 }
 285
 286
 287 static int wpa_ndiswrapper_get_capa(void *priv, struct wpa_driver_capa *capa)
 288 {
 289         struct wpa_driver_ndiswrapper_data *drv = priv;
 290         int ret = 0;
 291         struct iwreq priv_req;
 292
 293         os_memset(&priv_req, 0, sizeof(priv_req));
 294
 295         priv_req.u.data.pointer = (void *) capa;
 296         priv_req.u.data.length = sizeof(*capa);
 297         if (iw_set_ext(drv, WPA_GET_CAPA, &priv_req) < 0)
 298                 ret = -1;
 299         return ret;
 300
 301 }
 302
 303
 304 static int wpa_ndiswrapper_set_operstate(void *priv, int state)
 305 {
 306         struct wpa_driver_ndiswrapper_data *drv = priv;
 307         return wpa_driver_wext_set_operstate(drv->wext, state);
 308 }
 309
 310
 311 static void * wpa_ndiswrapper_init(void *ctx, const char *ifname)
 312 {
 313         struct wpa_driver_ndiswrapper_data *drv;
 314
 315         drv = os_zalloc(sizeof(*drv));
 316         if (drv == NULL)
 317                 return NULL;
 318         drv->wext = wpa_driver_wext_init(ctx, ifname);
 319         if (drv->wext == NULL) {
 320                 os_free(drv);
 321                 return NULL;
 322         }
 323
 324         drv->ctx = ctx;
 325         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 326         drv->sock = get_socket();
 327         if (drv->sock < 0) {
 328                 wpa_driver_wext_deinit(drv->wext);
 329                 os_free(drv);
 330                 return NULL;
 331         }
 332
 333         return drv;
 334 }
 335
 336
 337 static void wpa_ndiswrapper_deinit(void *priv)
 338 {
 339         struct wpa_driver_ndiswrapper_data *drv = priv;
 340         wpa_driver_wext_deinit(drv->wext);
 341         close(drv->sock);
 342         os_free(drv);
 343 }
 344
 345
 346 const struct wpa_driver_ops wpa_driver_ndiswrapper_ops = {
 347         .name = "ndiswrapper",
 348         .desc = "Linux ndiswrapper",
 349         .set_wpa = wpa_ndiswrapper_set_wpa,
 350         .set_key = wpa_ndiswrapper_set_key,
 351         .set_countermeasures = wpa_ndiswrapper_set_countermeasures,
 352         .set_drop_unencrypted = wpa_ndiswrapper_set_drop_unencrypted,
 353         .deauthenticate = wpa_ndiswrapper_deauthenticate,
 354         .disassociate = wpa_ndiswrapper_disassociate,
 355         .associate = wpa_ndiswrapper_associate,
 356         .set_auth_alg = wpa_ndiswrapper_set_auth_alg,
 357
 358         .get_bssid = wpa_ndiswrapper_get_bssid,
 359         .get_ssid = wpa_ndiswrapper_get_ssid,
 360         .scan = wpa_ndiswrapper_scan,
 361         .get_scan_results2 = wpa_ndiswrapper_get_scan_results,
 362         .init = wpa_ndiswrapper_init,
 363         .deinit = wpa_ndiswrapper_deinit,
 364         .get_capa = wpa_ndiswrapper_get_capa,
 365         .set_operstate = wpa_ndiswrapper_set_operstate,
 366 };