wpa_supplicant/main_winsvc.c

   1 /*
   2  * WPA Supplicant / main() function for Win32 service
   3  * Copyright (c) 2003-2006, 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  * The root of wpa_supplicant configuration in registry is
  15  * HKEY_LOCAL_MACHINE\\SOFTWARE\\%wpa_supplicant. This level includes global
  16  * parameters and a 'interfaces' subkey with all the interface configuration
  17  * (adapter to confname mapping). Each such mapping is a subkey that has
  18  * 'adapter' and 'config' values.
  19  *
  20  * This program can be run either as a normal command line application, e.g.,
  21  * for debugging, with 'wpasvc.exe app' or as a Windows service. Service need
  22  * to be registered with 'wpasvc.exe reg <full path to wpasvc.exe>'. After
  23  * this, it can be started like any other Windows service (e.g., 'net start
  24  * wpasvc') or it can be configured to start automatically through the Services
  25  * tool in administrative tasks. The service can be unregistered with
  26  * 'wpasvc.exe unreg'.
  27  */
  28
  29 #include "includes.h"
  30 #include <windows.h>
  31
  32 #include "common.h"
  33 #include "wpa_supplicant_i.h"
  34 #include "eloop.h"
  35
  36 #ifndef WPASVC_NAME
  37 #define WPASVC_NAME TEXT("wpasvc")
  38 #endif
  39 #ifndef WPASVC_DISPLAY_NAME
  40 #define WPASVC_DISPLAY_NAME TEXT("wpa_supplicant service")
  41 #endif
  42 #ifndef WPASVC_DESCRIPTION
  43 #define WPASVC_DESCRIPTION \
  44 TEXT("Provides IEEE 802.1X and WPA/WPA2 supplicant functionality")
  45 #endif
  46
  47 static HANDLE kill_svc;
  48
  49 static SERVICE_STATUS_HANDLE svc_status_handle;
  50 static SERVICE_STATUS svc_status;
  51
  52
  53 #ifndef WPA_KEY_ROOT
  54 #define WPA_KEY_ROOT HKEY_LOCAL_MACHINE
  55 #endif
  56 #ifndef WPA_KEY_PREFIX
  57 #define WPA_KEY_PREFIX TEXT("SOFTWARE\\wpa_supplicant")
  58 #endif
  59
  60 #ifdef UNICODE
  61 #define TSTR "%S"
  62 #else /* UNICODE */
  63 #define TSTR "%s"
  64 #endif /* UNICODE */
  65
  66
  67 static int read_interface(struct wpa_global *global, HKEY _hk,
  68                           const TCHAR *name)
  69 {
  70         HKEY hk;
  71 #define TBUFLEN 255
  72         TCHAR adapter[TBUFLEN], config[TBUFLEN], ctrl_interface[TBUFLEN];
  73         DWORD buflen, val;
  74         LONG ret;
  75         struct wpa_interface iface;
  76         int skip_on_error = 0;
  77
  78         ret = RegOpenKeyEx(_hk, name, 0, KEY_QUERY_VALUE, &hk);
  79         if (ret != ERROR_SUCCESS) {
  80                 printf("Could not open wpa_supplicant interface key\n");
  81                 return -1;
  82         }
  83
  84         os_memset(&iface, 0, sizeof(iface));
  85         iface.driver = "ndis";
  86
  87         buflen = sizeof(ctrl_interface);
  88         ret = RegQueryValueEx(hk, TEXT("ctrl_interface"), NULL, NULL,
  89                               (LPBYTE) ctrl_interface, &buflen);
  90         if (ret == ERROR_SUCCESS) {
  91                 ctrl_interface[TBUFLEN - 1] = TEXT('\0');
  92                 wpa_unicode2ascii_inplace(ctrl_interface);
  93                 printf("ctrl_interface[len=%d] '%s'\n",
  94                        (int) buflen, (char *) ctrl_interface);
  95                 iface.ctrl_interface = (char *) ctrl_interface;
  96         }
  97
  98         buflen = sizeof(adapter);
  99         ret = RegQueryValueEx(hk, TEXT("adapter"), NULL, NULL,
 100                               (LPBYTE) adapter, &buflen);
 101         if (ret == ERROR_SUCCESS) {
 102                 adapter[TBUFLEN - 1] = TEXT('\0');
 103                 wpa_unicode2ascii_inplace(adapter);
 104                 printf("adapter[len=%d] '%s'\n",
 105                        (int) buflen, (char *) adapter);
 106                 iface.ifname = (char *) adapter;
 107         }
 108
 109         buflen = sizeof(config);
 110         ret = RegQueryValueEx(hk, TEXT("config"), NULL, NULL,
 111                               (LPBYTE) config, &buflen);
 112         if (ret == ERROR_SUCCESS) {
 113                 config[sizeof(config) - 1] = '\0';
 114                 wpa_unicode2ascii_inplace(config);
 115                 printf("config[len=%d] '%s'\n",
 116                        (int) buflen, (char *) config);
 117                 iface.confname = (char *) config;
 118         }
 119
 120         buflen = sizeof(val);
 121         ret = RegQueryValueEx(hk, TEXT("skip_on_error"), NULL, NULL,
 122                               (LPBYTE) &val, &buflen);
 123         if (ret == ERROR_SUCCESS && buflen == sizeof(val))
 124                 skip_on_error = val;
 125
 126         RegCloseKey(hk);
 127
 128         if (wpa_supplicant_add_iface(global, &iface) == NULL) {
 129                 if (skip_on_error)
 130                         wpa_printf(MSG_DEBUG, "Skipped interface '%s' due to "
 131                                    "initialization failure", iface.ifname);
 132                 else
 133                         return -1;
 134         }
 135
 136         return 0;
 137 }
 138
 139
 140 static int wpa_supplicant_thread(void)
 141 {
 142         int exitcode;
 143         struct wpa_params params;
 144         struct wpa_global *global;
 145         HKEY hk, ihk;
 146         DWORD val, buflen, i;
 147         LONG ret;
 148
 149         if (os_program_init())
 150                 return -1;
 151
 152         os_memset(&params, 0, sizeof(params));
 153         params.wpa_debug_level = MSG_INFO;
 154
 155         ret = RegOpenKeyEx(WPA_KEY_ROOT, WPA_KEY_PREFIX,
 156                            0, KEY_QUERY_VALUE, &hk);
 157         if (ret != ERROR_SUCCESS) {
 158                 printf("Could not open wpa_supplicant registry key\n");
 159                 return -1;
 160         }
 161
 162         buflen = sizeof(val);
 163         ret = RegQueryValueEx(hk, TEXT("debug_level"), NULL, NULL,
 164                               (LPBYTE) &val, &buflen);
 165         if (ret == ERROR_SUCCESS && buflen == sizeof(val)) {
 166                 params.wpa_debug_level = val;
 167         }
 168
 169         buflen = sizeof(val);
 170         ret = RegQueryValueEx(hk, TEXT("debug_show_keys"), NULL, NULL,
 171                               (LPBYTE) &val, &buflen);
 172         if (ret == ERROR_SUCCESS && buflen == sizeof(val)) {
 173                 params.wpa_debug_show_keys = val;
 174         }
 175
 176         buflen = sizeof(val);
 177         ret = RegQueryValueEx(hk, TEXT("debug_timestamp"), NULL, NULL,
 178                               (LPBYTE) &val, &buflen);
 179         if (ret == ERROR_SUCCESS && buflen == sizeof(val)) {
 180                 params.wpa_debug_timestamp = val;
 181         }
 182
 183         buflen = sizeof(val);
 184         ret = RegQueryValueEx(hk, TEXT("debug_use_file"), NULL, NULL,
 185                               (LPBYTE) &val, &buflen);
 186         if (ret == ERROR_SUCCESS && buflen == sizeof(val) && val) {
 187                 params.wpa_debug_file_path = "\\Temp\\wpa_supplicant-log.txt";
 188         }
 189
 190         exitcode = 0;
 191         global = wpa_supplicant_init(&params);
 192         if (global == NULL) {
 193                 printf("Failed to initialize wpa_supplicant\n");
 194                 exitcode = -1;
 195         }
 196
 197         ret = RegOpenKeyEx(hk, TEXT("interfaces"), 0, KEY_ENUMERATE_SUB_KEYS,
 198                            &ihk);
 199         RegCloseKey(hk);
 200         if (ret != ERROR_SUCCESS) {
 201                 printf("Could not open wpa_supplicant interfaces registry "
 202                        "key\n");
 203                 return -1;
 204         }
 205
 206         for (i = 0; ; i++) {
 207                 TCHAR name[255];
 208                 DWORD namelen;
 209
 210                 namelen = 255;
 211                 ret = RegEnumKeyEx(ihk, i, name, &namelen, NULL, NULL, NULL,
 212                                    NULL);
 213
 214                 if (ret == ERROR_NO_MORE_ITEMS)
 215                         break;
 216
 217                 if (ret != ERROR_SUCCESS) {
 218                         printf("RegEnumKeyEx failed: 0x%x\n",
 219                                (unsigned int) ret);
 220                         break;
 221                 }
 222
 223                 if (namelen >= 255)
 224                         namelen = 255 - 1;
 225                 name[namelen] = '\0';
 226
 227                 wpa_printf(MSG_DEBUG, "interface %d: %s\n", (int) i, name);
 228                 if (read_interface(global, ihk, name) < 0)
 229                         exitcode = -1;
 230         }
 231
 232         RegCloseKey(ihk);
 233
 234         if (exitcode == 0)
 235                 exitcode = wpa_supplicant_run(global);
 236
 237         wpa_supplicant_deinit(global);
 238
 239         os_program_deinit();
 240
 241         return exitcode;
 242 }
 243
 244
 245 static DWORD svc_thread(LPDWORD param)
 246 {
 247         int ret = wpa_supplicant_thread();
 248
 249         svc_status.dwCurrentState = SERVICE_STOPPED;
 250         svc_status.dwWaitHint = 0;
 251         if (!SetServiceStatus(svc_status_handle, &svc_status)) {
 252                 printf("SetServiceStatus() failed: %d\n",
 253                        (int) GetLastError());
 254         }
 255
 256         return ret;
 257 }
 258
 259
 260 static int register_service(const TCHAR *exe)
 261 {
 262         SC_HANDLE svc, scm;
 263         SERVICE_DESCRIPTION sd;
 264
 265         printf("Registering service: " TSTR "\n", WPASVC_NAME);
 266
 267         scm = OpenSCManager(0, 0, SC_MANAGER_CREATE_SERVICE);
 268         if (!scm) {
 269                 printf("OpenSCManager failed: %d\n", (int) GetLastError());
 270                 return -1;
 271         }
 272
 273         svc = CreateService(scm, WPASVC_NAME, WPASVC_DISPLAY_NAME,
 274                             SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS,
 275                             SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL,
 276                             exe, NULL, NULL, NULL, NULL, NULL);
 277
 278         if (!svc) {
 279                 printf("CreateService failed: %d\n\n", (int) GetLastError());
 280                 CloseServiceHandle(scm);
 281                 return -1;
 282         }
 283
 284         os_memset(&sd, 0, sizeof(sd));
 285         sd.lpDescription = WPASVC_DESCRIPTION;
 286         if (!ChangeServiceConfig2(svc, SERVICE_CONFIG_DESCRIPTION, &sd)) {
 287                 printf("ChangeServiceConfig2 failed: %d\n",
 288                        (int) GetLastError());
 289                 /* This is not a fatal error, so continue anyway. */
 290         }
 291
 292         CloseServiceHandle(svc);
 293         CloseServiceHandle(scm);
 294
 295         printf("Service registered successfully.\n");
 296
 297         return 0;
 298 }
 299
 300
 301 static int unregister_service(void)
 302 {
 303         SC_HANDLE svc, scm;
 304         SERVICE_STATUS status;
 305
 306         printf("Unregistering service: " TSTR "\n", WPASVC_NAME);
 307
 308         scm = OpenSCManager(0, 0, SC_MANAGER_CREATE_SERVICE);
 309         if (!scm) {
 310                 printf("OpenSCManager failed: %d\n", (int) GetLastError());
 311                 return -1;
 312         }
 313
 314         svc = OpenService(scm, WPASVC_NAME, SERVICE_ALL_ACCESS | DELETE);
 315         if (!svc) {
 316                 printf("OpenService failed: %d\n\n", (int) GetLastError());
 317                 CloseServiceHandle(scm);
 318                 return -1;
 319         }
 320
 321         if (QueryServiceStatus(svc, &status)) {
 322                 if (status.dwCurrentState != SERVICE_STOPPED) {
 323                         printf("Service currently active - stopping "
 324                                "service...\n");
 325                         if (!ControlService(svc, SERVICE_CONTROL_STOP,
 326                                             &status)) {
 327                                 printf("ControlService failed: %d\n",
 328                                        (int) GetLastError());
 329                         }
 330                         Sleep(500);
 331                 }
 332         }
 333
 334         if (DeleteService(svc)) {
 335                 printf("Service unregistered successfully.\n");
 336         } else {
 337                 printf("DeleteService failed: %d\n", (int) GetLastError());
 338         }
 339
 340         CloseServiceHandle(svc);
 341         CloseServiceHandle(scm);
 342
 343         return 0;
 344 }
 345
 346
 347 static void WINAPI service_ctrl_handler(DWORD control_code)
 348 {
 349         switch (control_code) {
 350         case SERVICE_CONTROL_INTERROGATE:
 351                 break;
 352         case SERVICE_CONTROL_SHUTDOWN:
 353         case SERVICE_CONTROL_STOP:
 354                 svc_status.dwCurrentState = SERVICE_STOP_PENDING;
 355                 svc_status.dwWaitHint = 2000;
 356                 eloop_terminate();
 357                 SetEvent(kill_svc);
 358                 break;
 359         }
 360
 361         if (!SetServiceStatus(svc_status_handle, &svc_status)) {
 362                 printf("SetServiceStatus() failed: %d\n",
 363                        (int) GetLastError());
 364         }
 365 }
 366
 367
 368 static void WINAPI service_start(DWORD argc, LPTSTR *argv)
 369 {
 370         DWORD id;
 371
 372         svc_status_handle = RegisterServiceCtrlHandler(WPASVC_NAME,
 373                                                        service_ctrl_handler);
 374         if (svc_status_handle == (SERVICE_STATUS_HANDLE) 0) {
 375                 printf("RegisterServiceCtrlHandler failed: %d\n",
 376                        (int) GetLastError());
 377                 return;
 378         }
 379
 380         os_memset(&svc_status, 0, sizeof(svc_status));
 381         svc_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
 382         svc_status.dwCurrentState = SERVICE_START_PENDING;
 383         svc_status.dwWaitHint = 1000;
 384
 385         if (!SetServiceStatus(svc_status_handle, &svc_status)) {
 386                 printf("SetServiceStatus() failed: %d\n",
 387                        (int) GetLastError());
 388                 return;
 389         }
 390
 391         kill_svc = CreateEvent(0, TRUE, FALSE, 0);
 392         if (!kill_svc) {
 393                 printf("CreateEvent failed: %d\n", (int) GetLastError());
 394                 return;
 395         }
 396
 397         if (CreateThread(0, 0, (LPTHREAD_START_ROUTINE) svc_thread, 0, 0, &id)
 398             == 0) {
 399                 printf("CreateThread failed: %d\n", (int) GetLastError());
 400                 return;
 401         }
 402
 403         if (svc_status.dwCurrentState == SERVICE_START_PENDING) {
 404                 svc_status.dwCurrentState = SERVICE_RUNNING;
 405                 svc_status.dwWaitHint = 0;
 406                 svc_status.dwControlsAccepted = SERVICE_ACCEPT_STOP |
 407                         SERVICE_ACCEPT_SHUTDOWN;
 408         }
 409
 410         if (!SetServiceStatus(svc_status_handle, &svc_status)) {
 411                 printf("SetServiceStatus() failed: %d\n",
 412                        (int) GetLastError());
 413                 return;
 414         }
 415
 416         /* wait until service gets killed */
 417         WaitForSingleObject(kill_svc, INFINITE);
 418 }
 419
 420
 421 int main(int argc, char *argv[])
 422 {
 423         SERVICE_TABLE_ENTRY dt[] = {
 424                 { WPASVC_NAME, service_start },
 425                 { NULL, NULL }
 426         };
 427
 428         if (argc > 1) {
 429                 if (os_strcmp(argv[1], "reg") == 0) {
 430                         TCHAR *path;
 431                         int ret;
 432
 433                         if (argc < 3) {
 434                                 path = os_malloc(MAX_PATH * sizeof(TCHAR));
 435                                 if (path == NULL)
 436                                         return -1;
 437                                 if (!GetModuleFileName(NULL, path, MAX_PATH)) {
 438                                         printf("GetModuleFileName failed: "
 439                                                "%d\n", (int) GetLastError());
 440                                         os_free(path);
 441                                         return -1;
 442                                 }
 443                         } else {
 444                                 path = wpa_strdup_tchar(argv[2]);
 445                                 if (path == NULL)
 446                                         return -1;
 447                         }
 448                         ret = register_service(path);
 449                         os_free(path);
 450                         return ret;
 451                 } else if (os_strcmp(argv[1], "unreg") == 0) {
 452                         return unregister_service();
 453                 } else if (os_strcmp(argv[1], "app") == 0) {
 454                         return wpa_supplicant_thread();
 455                 }
 456         }
 457
 458         if (!StartServiceCtrlDispatcher(dt)) {
 459                 printf("StartServiceCtrlDispatcher failed: %d\n",
 460                        (int) GetLastError());
 461         }
 462
 463         return 0;
 464 }