reactos/dll/win32/ws2_32_new/src/rasdial.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS WinSock 2 API
   4  * FILE:        dll/win32/ws2_32_new/src/rasdial.c
   5  * PURPOSE:     RAS Auto-Dial Support
   6  * PROGRAMMER:  Alex Ionescu (alex@relsoft.net)
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include <ws2_32.h>
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /* DATA **********************************************************************/
  17
  18 typedef BOOL
  19 (WSAAPI *PWS_ATTEMPT_AUTODIAL_ADDR)(
  20     IN CONST SOCKADDR FAR *Name,
  21     IN INT NameLength
  22 );
  23
  24 typedef BOOL
  25 (WSAAPI *PWS_ATTEMPT_AUTODIAL_NAME)(IN CONST LPWSAQUERYSETW lpqsRestrictions);
  26
  27 typedef VOID
  28 (WSAAPI *PWS_NOTE_SUCCESSFUL_HOSTENT_LOOKUP)(
  29     IN CONST CHAR FAR *Name,
  30     IN CONST ULONG Address
  31 );
  32
  33 BOOLEAN WsRasInitialized;
  34 HINSTANCE WsRasDllHandle;
  35 CRITICAL_SECTION WsRasHelperLock;
  36 PWS_ATTEMPT_AUTODIAL_ADDR lpfnWSAttemptAutodialAddr;
  37 PWS_ATTEMPT_AUTODIAL_NAME lpfnWSAttemptAutodialName;
  38 PWS_NOTE_SUCCESSFUL_HOSTENT_LOOKUP lpfnWSNoteSuccessfulHostentLookup;
  39
  40 #define WsRasLock()          EnterCriticalSection(&WsRasHelperLock);
  41 #define WsRasUnlock()        LeaveCriticalSection(&WsRasHelperLock);
  42
  43 /* FUNCTIONS *****************************************************************/
  44
  45 VOID
  46 WSAAPI
  47 WsRasInitializeAutodial(VOID)
  48 {
  49     /* Initialize the autodial lock */
  50     InitializeCriticalSection(&WsRasHelperLock);
  51 }
  52
  53 VOID
  54 WSAAPI
  55 WsRasUninitializeAutodial(VOID)
  56 {
  57     /* Acquire lock */
  58     WsRasLock();
  59
  60     /* Free the library if it's loaded */
  61     if (WsRasDllHandle) FreeLibrary(WsRasDllHandle);
  62     WsRasDllHandle = NULL;
  63
  64     /* Release and delete lock */
  65     WsRasUnlock();
  66     DeleteCriticalSection(&WsRasHelperLock);
  67 }
  68
  69 INT
  70 WSAAPI
  71 WsRasLoadHelperDll(VOID)
  72 {
  73     CHAR HelperPath[MAX_PATH];
  74     HKEY WinsockKey;
  75     INT ErrorCode;
  76     DWORD RegType = REG_SZ;
  77     DWORD RegSize = MAX_PATH;
  78
  79     /* Acquire the lock */
  80     WsRasLock();
  81
  82     /* Check if we were already initialiazed */
  83     if (!WsRasInitialized)
  84     {
  85         /* Open the registry root key */
  86         WinsockKey = WsOpenRegistryRoot();
  87         if (WinsockKey)
  88         {
  89             /* Read the helper's location */
  90             ErrorCode = RegQueryValueEx(WinsockKey,
  91                                         "AutodialDLL",
  92                                         0,
  93                                         &RegType,
  94                                         (LPBYTE)&HelperPath,
  95                                         &RegSize);
  96             RegCloseKey(WinsockKey);
  97
  98             /* Make sure we read the path */
  99             if (ErrorCode == ERROR_SUCCESS)
 100             {
 101                 /* Now load it */
 102                 WsRasDllHandle = LoadLibrary(HelperPath);
 103             }
 104         }
 105
 106         /* Check if we weren't able to load it and load the default */
 107         if (!WsRasDllHandle) WsRasDllHandle = LoadLibrary("rasadhlp.dll");
 108
 109         /* Check again if we loaded it */
 110         if (WsRasDllHandle)
 111         {
 112             /* Get function pointers */
 113             lpfnWSAttemptAutodialAddr =
 114                 (PVOID)GetProcAddress(WsRasDllHandle,
 115                                       "WSAttemptAutodialAddr");
 116             lpfnWSAttemptAutodialName =
 117                 (PVOID)GetProcAddress(WsRasDllHandle,
 118                                       "WSAttemptAutodialName");
 119             lpfnWSNoteSuccessfulHostentLookup =
 120                 (PVOID)GetProcAddress(WsRasDllHandle,
 121                                       "WSNoteSuccessfulHostentLookup");
 122         }
 123
 124         /* Mark us as loaded */
 125         WsRasInitialized = TRUE;
 126     }
 127
 128     /* Release lock */
 129     WsRasUnlock();
 130
 131     /* Return status */
 132     return WsRasInitialized;
 133 }
 134
 135 BOOL
 136 WSAAPI
 137 WSAttemptAutodialAddr(IN CONST SOCKADDR FAR *Name,
 138                       IN INT NameLength)
 139 {
 140     /* Load the helper DLL and make sure it exports this routine */
 141     if (!(WsRasLoadHelperDll()) || !(lpfnWSAttemptAutodialAddr)) return FALSE;
 142
 143     /* Call the function in the helper */
 144     return lpfnWSAttemptAutodialAddr(Name, NameLength);
 145 }
 146
 147 BOOL
 148 WSAAPI
 149 WSAttemptAutodialName(IN CONST LPWSAQUERYSETW lpqsRestrictions)
 150 {
 151     /* Load the helper DLL and make sure it exports this routine */
 152     if (!(WsRasLoadHelperDll()) || !(lpfnWSAttemptAutodialName)) return FALSE;
 153
 154     /* Call the function in the helper */
 155     return lpfnWSAttemptAutodialName(lpqsRestrictions);
 156 }
 157
 158 VOID
 159 WSAAPI
 160 WSNoteSuccessfulHostentLookup(IN CONST CHAR FAR *Name,
 161                               IN CONST ULONG Address)
 162 {
 163     /* Load the helper DLL and make sure it exports this routine */
 164     if (!(WsRasLoadHelperDll()) || !(lpfnWSNoteSuccessfulHostentLookup)) return;
 165
 166     /* Call the function in the helper */
 167     lpfnWSNoteSuccessfulHostentLookup(Name, Address);
 168 }