src/drivers/driver_iphone.m

   1 /*
   2  * WPA Supplicant - iPhone/iPod touch Apple80211 driver interface
   3  * Copyright (c) 2007, Jouni Malinen <j@w1.fi>
   4  *
   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.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #define Boolean __DummyBoolean
  17 #include <CoreFoundation/CoreFoundation.h>
  18 #undef Boolean
  19
  20 #include "common.h"
  21 #include "driver.h"
  22 #include "eloop.h"
  23 #include "common/ieee802_11_defs.h"
  24
  25 #include "MobileApple80211.h"
  26
  27 struct wpa_driver_iphone_data {
  28         void *ctx;
  29         Apple80211Ref wireless_ctx;
  30         CFArrayRef scan_results;
  31         int ctrl_power;
  32 };
  33
  34
  35 static const void * cfdict_get_key_str(CFDictionaryRef dict, const char *key)
  36 {
  37         const void *res;
  38         CFStringRef str = CFStringCreateWithCString(kCFAllocatorDefault, key,
  39                                                     kCFStringEncodingMacRoman);
  40         if (str == NULL)
  41                 return NULL;
  42
  43         res = CFDictionaryGetValue(dict, str);
  44         CFRelease(str);
  45         return res;
  46 }
  47
  48
  49 static int wpa_driver_iphone_get_ssid(void *priv, u8 *ssid)
  50 {
  51         struct wpa_driver_iphone_data *drv = priv;
  52         CFDataRef data;
  53         int err, len;
  54
  55         err = Apple80211CopyValue(drv->wireless_ctx, APPLE80211_VALUE_SSID, 0,
  56                                   &data);
  57         if (err != 0) {
  58                 wpa_printf(MSG_DEBUG, "iPhone: Apple80211CopyValue(SSID) "
  59                            "failed: %d", err);
  60                 return -1;
  61         }
  62
  63         len = CFDataGetLength(data);
  64         if (len > 32) {
  65                 CFRelease(data);
  66                 return -1;
  67         }
  68         os_memcpy(ssid, CFDataGetBytePtr(data), len);
  69         CFRelease(data);
  70
  71         return len;
  72 }
  73
  74
  75 static int wpa_driver_iphone_get_bssid(void *priv, u8 *bssid)
  76 {
  77         struct wpa_driver_iphone_data *drv = priv;
  78         CFStringRef data;
  79         int err;
  80         int a1, a2, a3, a4, a5, a6;
  81
  82         err = Apple80211CopyValue(drv->wireless_ctx, APPLE80211_VALUE_BSSID, 0,
  83                                   &data);
  84         if (err != 0) {
  85                 wpa_printf(MSG_DEBUG, "iPhone: Apple80211CopyValue(BSSID) "
  86                            "failed: %d", err);
  87                 return -1;
  88         }
  89
  90         sscanf(CFStringGetCStringPtr(data, kCFStringEncodingMacRoman),
  91                "%x:%x:%x:%x:%x:%x", &a1, &a2, &a3, &a4, &a5, &a6);
  92         bssid[0] = a1;
  93         bssid[1] = a2;
  94         bssid[2] = a3;
  95         bssid[3] = a4;
  96         bssid[4] = a5;
  97         bssid[5] = a6;
  98
  99         CFRelease(data);
 100
 101         return 0;
 102 }
 103
 104
 105 static void wpa_driver_iphone_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 106 {
 107         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
 108 }
 109
 110
 111 static int wpa_driver_iphone_scan(void *priv, const u8 *ssid, size_t ssid_len)
 112 {
 113         struct wpa_driver_iphone_data *drv = priv;
 114         int err;
 115
 116         if (drv->scan_results) {
 117                 CFRelease(drv->scan_results);
 118                 drv->scan_results = NULL;
 119         }
 120
 121         err = Apple80211Scan(drv->wireless_ctx, &drv->scan_results, NULL);
 122         if (err) {
 123                 wpa_printf(MSG_DEBUG, "iPhone: Apple80211Scan failed: %d",
 124                            err);
 125                 return -1;
 126         }
 127
 128         eloop_register_timeout(0, 0, wpa_driver_iphone_scan_timeout, drv,
 129                                drv->ctx);
 130         return 0;
 131 }
 132
 133
 134 static int wpa_driver_iphone_get_scan_results(void *priv,
 135                                               struct wpa_scan_result *results,
 136                                               size_t max_size)
 137 {
 138         struct wpa_driver_iphone_data *drv = priv;
 139         size_t i, num;
 140
 141         if (drv->scan_results == NULL)
 142                 return 0;
 143
 144         num = CFArrayGetCount(drv->scan_results);
 145         if (num > max_size)
 146                 num = max_size;
 147         os_memset(results, 0, num * sizeof(struct wpa_scan_result));
 148
 149         for (i = 0; i < num; i++) {
 150                 struct wpa_scan_result *res = &results[i];
 151                 CFDictionaryRef dict =
 152                         CFArrayGetValueAtIndex(drv->scan_results, i);
 153                 CFDataRef data;
 154                 CFStringRef str;
 155                 CFNumberRef num;
 156                 int val;
 157
 158                 data = cfdict_get_key_str(dict, "SSID");
 159                 if (data) {
 160                         res->ssid_len = CFDataGetLength(data);
 161                         if (res->ssid_len > 32)
 162                                 res->ssid_len = 32;
 163                         os_memcpy(res->ssid, CFDataGetBytePtr(data),
 164                                   res->ssid_len);
 165                 }
 166
 167                 str = cfdict_get_key_str(dict, "BSSID");
 168                 if (str) {
 169                         int a1, a2, a3, a4, a5, a6;
 170                         sscanf(CFStringGetCStringPtr(
 171                                        str, kCFStringEncodingMacRoman),
 172                                "%x:%x:%x:%x:%x:%x",
 173                                &a1, &a2, &a3, &a4, &a5, &a6);
 174                         res->bssid[0] = a1;
 175                         res->bssid[1] = a2;
 176                         res->bssid[2] = a3;
 177                         res->bssid[3] = a4;
 178                         res->bssid[4] = a5;
 179                         res->bssid[5] = a6;
 180                 }
 181
 182                 num = cfdict_get_key_str(dict, "CAPABILITIES");
 183                 if (num) {
 184                         if (CFNumberGetValue(num, kCFNumberSInt32Type, &val))
 185                                 res->caps = val;
 186                 }
 187
 188                 num = cfdict_get_key_str(dict, "CHANNEL");
 189                 if (num) {
 190                         if (CFNumberGetValue(num, kCFNumberSInt32Type, &val))
 191                                 res->freq = 2407 + val * 5;
 192                 }
 193
 194                 num = cfdict_get_key_str(dict, "RSSI");
 195                 if (num) {
 196                         if (CFNumberGetValue(num, kCFNumberSInt32Type, &val))
 197                                 res->level = val;
 198                 }
 199
 200                 num = cfdict_get_key_str(dict, "NOISE");
 201                 if (num) {
 202                         if (CFNumberGetValue(num, kCFNumberSInt32Type, &val))
 203                                 res->noise = val;
 204                 }
 205
 206                 data = cfdict_get_key_str(dict, "IE");
 207                 if (data) {
 208                         u8 *ptr = (u8 *) CFDataGetBytePtr(data);
 209                         int len = CFDataGetLength(data);
 210                         u8 *pos = ptr, *end = ptr + len;
 211
 212                         while (pos + 2 < end) {
 213                                 if (pos + 2 + pos[1] > end)
 214                                         break;
 215                                 if (pos[0] == WLAN_EID_RSN &&
 216                                     pos[1] <= SSID_MAX_WPA_IE_LEN) {
 217                                         os_memcpy(res->rsn_ie, pos,
 218                                                   2 + pos[1]);
 219                                         res->rsn_ie_len = 2 + pos[1];
 220                                 }
 221                                 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
 222                                     pos[1] > 4 && pos[2] == 0x00 &&
 223                                     pos[3] == 0x50 && pos[4] == 0xf2 &&
 224                                     pos[5] == 0x01) {
 225                                         os_memcpy(res->wpa_ie, pos,
 226                                                   2 + pos[1]);
 227                                         res->wpa_ie_len = 2 + pos[1];
 228                                 }
 229
 230                                 pos = pos + 2 + pos[1];
 231                         }
 232                 }
 233         }
 234
 235         return num;
 236 }
 237
 238
 239 static void wpa_driver_iphone_assoc_timeout(void *eloop_ctx, void *timeout_ctx)
 240 {
 241         struct wpa_driver_iphone_data *drv = eloop_ctx;
 242         u8 bssid[ETH_ALEN];
 243
 244         if (wpa_driver_iphone_get_bssid(drv, bssid) != 0) {
 245                 eloop_register_timeout(1, 0, wpa_driver_iphone_assoc_timeout,
 246                                        drv, drv->ctx);
 247                 return;
 248         }
 249
 250         wpa_supplicant_event(timeout_ctx, EVENT_ASSOC, NULL);
 251 }
 252
 253
 254 static int wpa_driver_iphone_associate(
 255         void *priv, struct wpa_driver_associate_params *params)
 256 {
 257         struct wpa_driver_iphone_data *drv = priv;
 258         int i, num, err;
 259         size_t ssid_len;
 260         CFDictionaryRef bss = NULL;
 261
 262         /*
 263          * TODO: Consider generating parameters instead of just using an entry
 264          * from scan results in order to support ap_scan=2.
 265          */
 266
 267         if (drv->scan_results == NULL) {
 268                 wpa_printf(MSG_DEBUG, "iPhone: No scan results - cannot "
 269                            "associate");
 270                 return -1;
 271         }
 272
 273         num = CFArrayGetCount(drv->scan_results);
 274
 275         for (i = 0; i < num; i++) {
 276                 CFDictionaryRef dict =
 277                         CFArrayGetValueAtIndex(drv->scan_results, i);
 278                 CFDataRef data;
 279
 280                 data = cfdict_get_key_str(dict, "SSID");
 281                 if (data == NULL)
 282                         continue;
 283
 284                 ssid_len = CFDataGetLength(data);
 285                 if (ssid_len != params->ssid_len ||
 286                     os_memcmp(CFDataGetBytePtr(data), params->ssid, ssid_len)
 287                     != 0)
 288                         continue;
 289
 290                 bss = dict;
 291                 break;
 292         }
 293
 294         if (bss == NULL) {
 295                 wpa_printf(MSG_DEBUG, "iPhone: Could not find SSID from scan "
 296                            "results - cannot associate");
 297                 return -1;
 298         }
 299
 300         wpa_printf(MSG_DEBUG, "iPhone: Trying to associate with a BSS found "
 301                    "from scan results");
 302
 303         err = Apple80211Associate(drv->wireless_ctx, bss, NULL);
 304         if (err) {
 305                 wpa_printf(MSG_DEBUG, "iPhone: Apple80211Associate() failed: "
 306                            "%d", err);
 307                 return -1;
 308         }
 309
 310         /*
 311          * Driver is actually already associated; report association from an
 312          * eloop callback.
 313          */
 314         eloop_cancel_timeout(wpa_driver_iphone_assoc_timeout, drv, drv->ctx);
 315         eloop_register_timeout(0, 0, wpa_driver_iphone_assoc_timeout, drv,
 316                                drv->ctx);
 317
 318         return 0;
 319 }
 320
 321
 322 static int wpa_driver_iphone_set_key(void *priv, wpa_alg alg, const u8 *addr,
 323                                      int key_idx, int set_tx, const u8 *seq,
 324                                      size_t seq_len, const u8 *key,
 325                                      size_t key_len)
 326 {
 327         /*
 328          * TODO: Need to either support configuring PMK for 4-way handshake or
 329          * PTK for TKIP/CCMP.
 330          */
 331         return -1;
 332 }
 333
 334
 335 static int wpa_driver_iphone_get_capa(void *priv, struct wpa_driver_capa *capa)
 336 {
 337         os_memset(capa, 0, sizeof(*capa));
 338
 339         capa->key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 340                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
 341                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 342                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
 343         capa->enc = WPA_DRIVER_CAPA_ENC_WEP40 | WPA_DRIVER_CAPA_ENC_WEP104 |
 344                 WPA_DRIVER_CAPA_ENC_TKIP | WPA_DRIVER_CAPA_ENC_CCMP;
 345         capa->auth = WPA_DRIVER_AUTH_OPEN | WPA_DRIVER_AUTH_SHARED |
 346                 WPA_DRIVER_AUTH_LEAP;
 347         capa->flags = WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
 348
 349         return 0;
 350 }
 351
 352
 353 static void * wpa_driver_iphone_init(void *ctx, const char *ifname)
 354 {
 355         struct wpa_driver_iphone_data *drv;
 356         int err;
 357         char power;
 358         CFStringRef name;
 359         CFDictionaryRef dict;
 360
 361         drv = os_zalloc(sizeof(*drv));
 362         if (drv == NULL)
 363                 return NULL;
 364         drv->ctx = ctx;
 365         err = Apple80211Open(&drv->wireless_ctx);
 366         if (err) {
 367                 wpa_printf(MSG_ERROR, "iPhone: Apple80211Open failed: %d",
 368                            err);
 369                 os_free(drv);
 370                 return NULL;
 371         }
 372
 373         name = CFStringCreateWithCString(kCFAllocatorDefault, ifname,
 374                                          kCFStringEncodingISOLatin1);
 375         if (name == NULL) {
 376                 wpa_printf(MSG_ERROR, "iPhone: ifname -> CFString failed");
 377                 Apple80211Close(drv->wireless_ctx);
 378                 os_free(drv);
 379                 return NULL;
 380         }
 381
 382         err = Apple80211BindToInterface(drv->wireless_ctx, name);
 383         CFRelease(name);
 384
 385         if (err) {
 386                 wpa_printf(MSG_ERROR, "iPhone: Apple80211BindToInterface "
 387                            "failed: %d", err);
 388                 Apple80211Close(drv->wireless_ctx);
 389                 os_free(drv);
 390                 return NULL;
 391         }
 392
 393         err = Apple80211GetPower(drv->wireless_ctx, &power);
 394         if (err)
 395                 wpa_printf(MSG_DEBUG, "iPhone: Apple80211GetPower failed: %d",
 396                            err);
 397
 398         wpa_printf(MSG_DEBUG, "iPhone: Power=%d", power);
 399
 400         if (!power) {
 401                 drv->ctrl_power = 1;
 402                 err = Apple80211SetPower(drv->wireless_ctx, 1);
 403                 if (err) {
 404                         wpa_printf(MSG_DEBUG, "iPhone: Apple80211SetPower "
 405                                    "failed: %d", err);
 406                         Apple80211Close(drv->wireless_ctx);
 407                         os_free(drv);
 408                         return NULL;
 409                 }
 410         }
 411
 412         err = Apple80211GetInfoCopy(drv->wireless_ctx, &dict);
 413         if (err == 0) {
 414                 CFShow(dict);
 415                 CFRelease(dict);
 416         } else {
 417                 printf("Apple80211GetInfoCopy: %d\n", err);
 418         }
 419
 420         return drv;
 421 }
 422
 423
 424 static void wpa_driver_iphone_deinit(void *priv)
 425 {
 426         struct wpa_driver_iphone_data *drv = priv;
 427         int err;
 428
 429         eloop_cancel_timeout(wpa_driver_iphone_scan_timeout, drv, drv->ctx);
 430         eloop_cancel_timeout(wpa_driver_iphone_assoc_timeout, drv, drv->ctx);
 431
 432         if (drv->ctrl_power) {
 433                 wpa_printf(MSG_DEBUG, "iPhone: Power down the interface");
 434                 err = Apple80211SetPower(drv->wireless_ctx, 0);
 435                 if (err) {
 436                         wpa_printf(MSG_DEBUG, "iPhone: Apple80211SetPower(0) "
 437                                    "failed: %d", err);
 438                 }
 439         }
 440
 441         err = Apple80211Close(drv->wireless_ctx);
 442         if (err) {
 443                 wpa_printf(MSG_DEBUG, "iPhone: Apple80211Close failed: %d",
 444                            err);
 445         }
 446
 447         if (drv->scan_results)
 448                 CFRelease(drv->scan_results);
 449
 450         os_free(drv);
 451 }
 452
 453
 454 const struct wpa_driver_ops wpa_driver_iphone_ops = {
 455         .name = "iphone",
 456         .desc = "iPhone/iPod touch Apple80211 driver",
 457         .get_ssid = wpa_driver_iphone_get_ssid,
 458         .get_bssid = wpa_driver_iphone_get_bssid,
 459         .init = wpa_driver_iphone_init,
 460         .deinit = wpa_driver_iphone_deinit,
 461         .scan = wpa_driver_iphone_scan,
 462         .get_scan_results = wpa_driver_iphone_get_scan_results,
 463         .associate = wpa_driver_iphone_associate,
 464         .set_key = wpa_driver_iphone_set_key,
 465         .get_capa = wpa_driver_iphone_get_capa,
 466 };