contrib/hostapd/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  * Please note that ndiswrapper supports WPA configuration via Linux wireless
  16  * extensions and if the kernel includes support for this, driver_wext.c should
  17  * be used instead of this driver wrapper.
  18  */
  19
  20 #include "includes.h"
  21 #include <sys/ioctl.h>
  22
  23 #include "wireless_copy.h"
  24 #include "common.h"
  25 #include "driver.h"
  26 #include "driver_wext.h"
  27
  28 struct wpa_driver_ndiswrapper_data {
  29         void *wext; /* private data for driver_wext */
  30         void *ctx;
  31         char ifname[IFNAMSIZ + 1];
  32         int sock;
  33 };
  34
  35
  36 struct wpa_key
  37 {
  38         wpa_alg alg;
  39         const u8 *addr;
  40         int key_index;
  41         int set_tx;
  42         const u8 *seq;
  43         size_t seq_len;
  44         const u8 *key;
  45         size_t key_len;
  46 };
  47
  48 struct wpa_assoc_info
  49 {
  50         const u8 *bssid;
  51         const u8 *ssid;
  52         size_t ssid_len;
  53         int freq;
  54         const u8 *wpa_ie;
  55         size_t wpa_ie_len;
  56         wpa_cipher pairwise_suite;
  57         wpa_cipher group_suite;
  58         wpa_key_mgmt key_mgmt_suite;
  59         int auth_alg;
  60         int mode;
  61 };
  62
  63 #define PRIV_RESET                      SIOCIWFIRSTPRIV+0
  64 #define WPA_SET_WPA                     SIOCIWFIRSTPRIV+1
  65 #define WPA_SET_KEY                     SIOCIWFIRSTPRIV+2
  66 #define WPA_ASSOCIATE                   SIOCIWFIRSTPRIV+3
  67 #define WPA_DISASSOCIATE                SIOCIWFIRSTPRIV+4
  68 #define WPA_DROP_UNENCRYPTED            SIOCIWFIRSTPRIV+5
  69 #define WPA_SET_COUNTERMEASURES         SIOCIWFIRSTPRIV+6
  70 #define WPA_DEAUTHENTICATE              SIOCIWFIRSTPRIV+7
  71 #define WPA_SET_AUTH_ALG                SIOCIWFIRSTPRIV+8
  72 #define WPA_INIT                        SIOCIWFIRSTPRIV+9
  73 #define WPA_DEINIT                      SIOCIWFIRSTPRIV+10
  74 #define WPA_GET_CAPA                    SIOCIWFIRSTPRIV+11
  75
  76 static int get_socket(void)
  77 {
  78         static const int families[] = {
  79                 AF_INET, AF_IPX, AF_AX25, AF_APPLETALK
  80         };
  81         unsigned int i;
  82         int sock;
  83
  84         for (i = 0; i < sizeof(families) / sizeof(int); ++i) {
  85                 sock = socket(families[i], SOCK_DGRAM, 0);
  86                 if (sock >= 0)
  87                         return sock;
  88         }
  89
  90         return -1;
  91 }
  92
  93 static int iw_set_ext(struct wpa_driver_ndiswrapper_data *drv, int request,
  94                       struct iwreq *pwrq)
  95 {
  96         os_strlcpy(pwrq->ifr_name, drv->ifname, IFNAMSIZ);
  97         return ioctl(drv->sock, request, pwrq);
  98 }
  99
 100 static int wpa_ndiswrapper_set_wpa(void *priv, int enabled)
 101 {
 102         struct wpa_driver_ndiswrapper_data *drv = priv;
 103         struct iwreq priv_req;
 104         int ret = 0;
 105
 106         os_memset(&priv_req, 0, sizeof(priv_req));
 107
 108         priv_req.u.data.flags = enabled;
 109         if (iw_set_ext(drv, WPA_SET_WPA, &priv_req) < 0)
 110                 ret = -1;
 111         return ret;
 112 }
 113
 114 static int wpa_ndiswrapper_set_key(void *priv, wpa_alg alg, const u8 *addr,
 115                                    int key_idx, int set_tx,
 116                                    const u8 *seq, size_t seq_len,
 117                                    const u8 *key, size_t key_len)
 118 {
 119         struct wpa_driver_ndiswrapper_data *drv = priv;
 120         struct wpa_key wpa_key;
 121         int ret = 0;
 122         struct iwreq priv_req;
 123
 124         os_memset(&priv_req, 0, sizeof(priv_req));
 125
 126         wpa_key.alg = alg;
 127         wpa_key.addr = addr;
 128         wpa_key.key_index = key_idx;
 129         wpa_key.set_tx = set_tx;
 130         wpa_key.seq = seq;
 131         wpa_key.seq_len = seq_len;
 132         wpa_key.key = key;
 133         wpa_key.key_len = key_len;
 134
 135         priv_req.u.data.pointer = (void *)&wpa_key;
 136         priv_req.u.data.length = sizeof(wpa_key);
 137
 138         if (iw_set_ext(drv, WPA_SET_KEY, &priv_req) < 0)
 139                 ret = -1;
 140
 141         if (alg == WPA_ALG_NONE) {
 142                 /*
 143                  * ndiswrapper did not seem to be clearing keys properly in
 144                  * some cases with WPA_SET_KEY. For example, roaming from WPA
 145                  * enabled AP to plaintext one seemed to fail since the driver
 146                  * did not associate. Try to make sure the keys are cleared so
 147                  * that plaintext APs can be used in all cases.
 148                  */
 149                 wpa_driver_wext_set_key(drv->wext, alg, addr, key_idx, set_tx,
 150                                         seq, seq_len, key, key_len);
 151         }
 152
 153         return ret;
 154 }
 155
 156 static int wpa_ndiswrapper_set_countermeasures(void *priv, int enabled)
 157 {
 158         struct wpa_driver_ndiswrapper_data *drv = priv;
 159         int ret = 0;
 160         struct iwreq priv_req;
 161
 162         os_memset(&priv_req, 0, sizeof(priv_req));
 163
 164         priv_req.u.param.value = enabled;
 165         if (iw_set_ext(drv, WPA_SET_COUNTERMEASURES, &priv_req) < 0)
 166                 ret = -1;
 167
 168         return ret;
 169 }
 170
 171 static int wpa_ndiswrapper_set_drop_unencrypted(void *priv,
 172                                                 int enabled)
 173 {
 174         struct wpa_driver_ndiswrapper_data *drv = priv;
 175         int ret = 0;
 176         struct iwreq priv_req;
 177
 178         os_memset(&priv_req, 0, sizeof(priv_req));
 179
 180         priv_req.u.param.value = enabled;
 181         if (iw_set_ext(drv, WPA_DROP_UNENCRYPTED, &priv_req) < 0)
 182                 ret = -1;
 183         return ret;
 184 }
 185
 186 static int wpa_ndiswrapper_deauthenticate(void *priv, const u8 *addr,
 187                                           int reason_code)
 188 {
 189         struct wpa_driver_ndiswrapper_data *drv = priv;
 190         int ret = 0;
 191         struct iwreq priv_req;
 192
 193         os_memset(&priv_req, 0, sizeof(priv_req));
 194
 195         priv_req.u.param.value = reason_code;
 196         os_memcpy(&priv_req.u.ap_addr.sa_data, addr, ETH_ALEN);
 197         if (iw_set_ext(drv, WPA_DEAUTHENTICATE, &priv_req) < 0)
 198                 ret = -1;
 199         return ret;
 200 }
 201
 202 static int wpa_ndiswrapper_disassociate(void *priv, const u8 *addr,
 203                                         int reason_code)
 204 {
 205         struct wpa_driver_ndiswrapper_data *drv = priv;
 206         int ret = 0;
 207         struct iwreq priv_req;
 208
 209         os_memset(&priv_req, 0, sizeof(priv_req));
 210
 211         os_memcpy(&priv_req.u.ap_addr.sa_data, addr, ETH_ALEN);
 212         if (iw_set_ext(drv, WPA_DISASSOCIATE, &priv_req) < 0)
 213                 ret = -1;
 214         return ret;
 215 }
 216
 217 static int
 218 wpa_ndiswrapper_associate(void *priv,
 219                           struct wpa_driver_associate_params *params)
 220 {
 221         struct wpa_driver_ndiswrapper_data *drv = priv;
 222         int ret = 0;
 223         struct wpa_assoc_info wpa_assoc_info;
 224         struct iwreq priv_req;
 225
 226         os_memset(&priv_req, 0, sizeof(priv_req));
 227         os_memset(&wpa_assoc_info, 0, sizeof(wpa_assoc_info));
 228
 229         wpa_assoc_info.bssid = params->bssid;
 230         wpa_assoc_info.ssid = params->ssid;
 231         wpa_assoc_info.ssid_len = params->ssid_len;
 232         wpa_assoc_info.freq = params->freq;
 233         wpa_assoc_info.wpa_ie = params->wpa_ie;
 234         wpa_assoc_info.wpa_ie_len = params->wpa_ie_len;
 235         wpa_assoc_info.pairwise_suite = params->pairwise_suite;
 236         wpa_assoc_info.group_suite = params->group_suite;
 237         wpa_assoc_info.key_mgmt_suite = params->key_mgmt_suite;
 238         wpa_assoc_info.auth_alg = params->auth_alg;
 239         wpa_assoc_info.mode = params->mode;
 240
 241         priv_req.u.data.pointer = (void *)&wpa_assoc_info;
 242         priv_req.u.data.length = sizeof(wpa_assoc_info);
 243
 244         if (iw_set_ext(drv, WPA_ASSOCIATE, &priv_req) < 0)
 245                 ret = -1;
 246         return ret;
 247 }
 248
 249 static int wpa_ndiswrapper_set_auth_alg(void *priv, int auth_alg)
 250 {
 251         struct wpa_driver_ndiswrapper_data *drv = priv;
 252         int ret = 0;
 253         struct iwreq priv_req;
 254
 255         os_memset(&priv_req, 0, sizeof(priv_req));
 256
 257         priv_req.u.param.value = auth_alg;
 258         if (iw_set_ext(drv, WPA_SET_AUTH_ALG, &priv_req) < 0)
 259                 ret = -1;
 260         return ret;
 261 }
 262
 263 static int wpa_ndiswrapper_get_bssid(void *priv, u8 *bssid)
 264 {
 265         struct wpa_driver_ndiswrapper_data *drv = priv;
 266         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 267 }
 268
 269
 270 static int wpa_ndiswrapper_get_ssid(void *priv, u8 *ssid)
 271 {
 272         struct wpa_driver_ndiswrapper_data *drv = priv;
 273         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 274 }
 275
 276
 277 static int wpa_ndiswrapper_scan(void *priv, const u8 *ssid, size_t ssid_len)
 278 {
 279         struct wpa_driver_ndiswrapper_data *drv = priv;
 280         return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 281 }
 282
 283
 284 static struct wpa_scan_results * wpa_ndiswrapper_get_scan_results(void *priv)
 285 {
 286         struct wpa_driver_ndiswrapper_data *drv = priv;
 287         return wpa_driver_wext_get_scan_results(drv->wext);
 288 }
 289
 290
 291 static int wpa_ndiswrapper_get_capa(void *priv, struct wpa_driver_capa *capa)
 292 {
 293         struct wpa_driver_ndiswrapper_data *drv = priv;
 294         int ret = 0;
 295         struct iwreq priv_req;
 296
 297         os_memset(&priv_req, 0, sizeof(priv_req));
 298
 299         priv_req.u.data.pointer = (void *) capa;
 300         priv_req.u.data.length = sizeof(*capa);
 301         if (iw_set_ext(drv, WPA_GET_CAPA, &priv_req) < 0)
 302                 ret = -1;
 303         return ret;
 304
 305 }
 306
 307
 308 static int wpa_ndiswrapper_set_operstate(void *priv, int state)
 309 {
 310         struct wpa_driver_ndiswrapper_data *drv = priv;
 311         return wpa_driver_wext_set_operstate(drv->wext, state);
 312 }
 313
 314
 315 static void * wpa_ndiswrapper_init(void *ctx, const char *ifname)
 316 {
 317         struct wpa_driver_ndiswrapper_data *drv;
 318
 319         drv = os_zalloc(sizeof(*drv));
 320         if (drv == NULL)
 321                 return NULL;
 322         drv->wext = wpa_driver_wext_init(ctx, ifname);
 323         if (drv->wext == NULL) {
 324                 os_free(drv);
 325                 return NULL;
 326         }
 327
 328         drv->ctx = ctx;
 329         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 330         drv->sock = get_socket();
 331         if (drv->sock < 0) {
 332                 wpa_driver_wext_deinit(drv->wext);
 333                 os_free(drv);
 334                 return NULL;
 335         }
 336
 337         return drv;
 338 }
 339
 340
 341 static void wpa_ndiswrapper_deinit(void *priv)
 342 {
 343         struct wpa_driver_ndiswrapper_data *drv = priv;
 344         wpa_driver_wext_deinit(drv->wext);
 345         close(drv->sock);
 346         os_free(drv);
 347 }
 348
 349
 350 const struct wpa_driver_ops wpa_driver_ndiswrapper_ops = {
 351         .name = "ndiswrapper",
 352         .desc = "Linux ndiswrapper (deprecated; use wext)",
 353         .set_wpa = wpa_ndiswrapper_set_wpa,
 354         .set_key = wpa_ndiswrapper_set_key,
 355         .set_countermeasures = wpa_ndiswrapper_set_countermeasures,
 356         .set_drop_unencrypted = wpa_ndiswrapper_set_drop_unencrypted,
 357         .deauthenticate = wpa_ndiswrapper_deauthenticate,
 358         .disassociate = wpa_ndiswrapper_disassociate,
 359         .associate = wpa_ndiswrapper_associate,
 360         .set_auth_alg = wpa_ndiswrapper_set_auth_alg,
 361
 362         .get_bssid = wpa_ndiswrapper_get_bssid,
 363         .get_ssid = wpa_ndiswrapper_get_ssid,
 364         .scan = wpa_ndiswrapper_scan,
 365         .get_scan_results2 = wpa_ndiswrapper_get_scan_results,
 366         .init = wpa_ndiswrapper_init,
 367         .deinit = wpa_ndiswrapper_deinit,
 368         .get_capa = wpa_ndiswrapper_get_capa,
 369         .set_operstate = wpa_ndiswrapper_set_operstate,
 370 };