#include <windows.h>
#include <stdio.h>
#include <sys/stat.h>



/* modified with suggestions from Kevin Dunlap so we only pick out netcards bound to tcpip */
  int get_win95_interfaces()

  {
     HKEY hk, dk, rk, ck;                      /* registry key handle */
     BOOL bSuccess;
     char realkey[200];
     DWORD sizeofrealkey = 200;
     char netkey[50];
     DWORD sizeofnetkey = 50;
     char newkey[50];
     DWORD sizeofnewkey = 50;
     char driverkey[50];
     DWORD sizeofdriverkey = 50;
     char nettype[50];		
     DWORD sizeofnettype = 50;
     char subkey[50];
     DWORD sizeofsubkey = 50;

     char checkkey[50];
     DWORD sizeofcheckkey = 50;

     int Done = 0;
     int Done2 = 0;

     /* these need to be big as they are multi_sz in type and hold all ip addresses and subnet mask for a
        given interface */
     char IpAddresses[10000];
     char *ipptr = IpAddresses;
     DWORD sizeofipaddresses = 10000;
     char SubNetMasks[10000];
     char *subptr = SubNetMasks;
     DWORD sizeofsubnetmasks = 10000;

     char oneIpAddress[16];
     char oneSubNetMask[16];
     int count = 0;
     char *cp;

    /* now get all the netcard (ie 0001) ..._  values which are bound to tcpip */ 

    strcpy(newkey,"ENUM\\Network\\MSTCP");
    printf("opening %s \n",newkey);
    bSuccess = RegOpenKey(HKEY_LOCAL_MACHINE,newkey,&hk);
    if(bSuccess != ERROR_SUCCESS)
    {
        printf("Can not get MSTCP Linkage from registery.\n");
        return -1;
    }

     while (!Done)
       {
	    sizeofnetkey = 50;
	     bSuccess = RegEnumKey(hk, (DWORD)count, (LPTSTR)netkey, sizeofnetkey);
	     if(bSuccess == ERROR_NO_MORE_ITEMS)
		  {
			printf("No more network cards in registery.\n");
			Done = TRUE;
               break;
             }
	
	     if ((bSuccess != ERROR_SUCCESS) && (bSuccess != ERROR_NO_MORE_ITEMS))
		   {
			printf("Can not get network card keys from registery.\n");
			RegCloseKey(hk);
			return -1;
		   }

          ++count;
     
	 /* now the devicedesc here does not specify the dial up so we must get the
            last part off the key and try the key enum//root//net//netkey   */

         strcpy(checkkey,"ENUM\\Root\\Net\\");
         strcat(checkkey,netkey);
         printf("Checking %s\\DeviceDesc to see if it is temporary (dial up) interface.\n",checkkey);

       /* not sure if this works but on my eisa machine these were not there
          so if they are not there assume they are not temporary .. ie enum\eisa
          for eisa cards instead of enum\\root but I imagine all ras interfaces are like this
          above.. so if not there it is not a ras temporary interface */

	 // get the check value
	 /*check for Dial up adapter*/
 	 bSuccess = RegOpenKey(HKEY_LOCAL_MACHINE,checkkey,&ck);
      if(bSuccess != ERROR_SUCCESS)
	  {
	    printf("Can not open key [%s] from registery.\n",checkkey);
         printf("Assuming it is not a temporary interface!\n");
         strcpy(nettype,"dummy");
	   }

      else
      {
      // now get the value
	 sizeofnettype = 50;
	 bSuccess = RegQueryValueEx(ck,     /* subkey handle         */
	         "DeviceDesc",              /* value name            */
		    NULL,                   /* must be zero          */
		    NULL,                   /* value type          not required  */
              (LPBYTE) &nettype,            /* address of value data */
              &sizeofnettype);              /* length of value data  */

      RegCloseKey(ck); // not needed anymore either way
      if(bSuccess != ERROR_SUCCESS)
          {
            printf("Couldn't fetch Device Desc. value \n");
            printf("Assuming it is not a temporary interface!\n");
            strcpy(nettype,"dummy");
          }
      } // not there

      // go on
	 if (strncmp(strupr(nettype),"DIAL-UP ADAPTER",15) == 0)
          {
           /* skip it */
	   printf("Skipping Temporary interface: [%s]\n",nettype);
          }

         else { // is not temporary interface
            // ok get drivername

	/*now we have the values so we need to get the driver value for the key */
	strcpy(driverkey,"ENUM\\Network\\MSTCP\\");
	strcat(driverkey,netkey);

	// get the Driver value
	/*check for Dial up adapter*/
	bSuccess = RegOpenKey(HKEY_LOCAL_MACHINE,driverkey,&dk);
	if(bSuccess != ERROR_SUCCESS)
	  {
	    printf("Can not open key [%s] from registery.\n",driverkey);
            RegCloseKey(hk);
	    return -1;
	   }

                // ok it is not temporary so get drivername
		sizeofsubkey = 50;
		bSuccess = RegQueryValueEx(dk,     /* subkey handle         */
	  	      "Driver",                    /* value name            */
		      NULL,                        /* must be zero          */
		      NULL,                        /* value type          not required  */
		      (LPBYTE) &subkey,            /* address of value data */
		      &sizeofsubkey);              /* length of value data  */

               if(bSuccess != ERROR_SUCCESS)
		  {
		    printf("Error in RegQueryValueEx fetching Driver value \n");
		    RegCloseKey(dk);
		    RegCloseKey(hk);
		    return -1;
		  }

          RegCloseKey(dk); //driver key not needed any longer

          // ok we now have the vlaue
	  printf("have driver value = %s \n",subkey);
	     
          // now open the real key
          strcpy(realkey,"SYSTEM\\CurrentControlSet\\Services\\Class\\");
          strcat(realkey,subkey);
	     
          printf("opening Network key: %s \n",realkey);
          bSuccess = RegOpenKey(HKEY_LOCAL_MACHINE,realkey,&rk);
          if(bSuccess != ERROR_SUCCESS)
            {
             printf("error opening real network key [%s].\n",realkey);
             RegCloseKey(hk);
             return -1;
            }
        
           printf("getting ip address ...\n");
           sizeofipaddresses = 10000;
           bSuccess = RegQueryValueEx(rk,     /* subkey handle         */
                "IPAddress",                  /* value name            */
                 NULL,                        /* must be zero          */
                 NULL,                        /* value type          not required  */
                 (LPBYTE) &IpAddresses,       /* address of value data */
                 &sizeofipaddresses);         /* length of value data  */

           if(bSuccess != ERROR_SUCCESS)
              {
               printf("Error in RegQueryValueEx fetching IPAddress parameter! \n");
               RegCloseKey(rk);
               RegCloseKey(hk);
               return -1;
              }
              
          printf("ipaddress block: size = %d\n",sizeofipaddresses);
          printf("-----------------------------------------------------------\n");
          cp = IpAddresses;
          { int i;
          for (i=0; i<(int)sizeofipaddresses; i++)
            { 
             printf("%c",*cp);
             ++cp;
            }
          printf("\n-----------------------------------------------------------\n");
          }

           /* ok now get the subnetmask */
           sizeofsubnetmasks = 10000;
           printf("Getting subnetmask block\n");
           bSuccess = RegQueryValueEx(rk,     /* subkey handle         */
              "IPMask",                       /* value name            */
               NULL,                          /* must be zero          */
               NULL,                          /* value type          not required  */
               (LPBYTE) &SubNetMasks,         /* address of value data */
               &sizeofsubnetmasks);           /* length of value data  */
   
           if(bSuccess != ERROR_SUCCESS)
              {
               printf("Error in RegQueryValueEx fetching IPMask parameter!\n");
               RegCloseKey(rk);
               RegCloseKey(hk);
               return -1;
              }

          printf("subnet block: size = %d\n",sizeofsubnetmasks);
          printf("-----------------------------------------------------------\n");
          cp = SubNetMasks;
          { int i;
          for (i=0; i<(int)sizeofsubnetmasks; i++)
            { 
             printf("%c",*cp);
             ++cp;
            }
          printf("\n-----------------------------------------------------------\n");
          }
          RegCloseKey(rk);
          /* ok now that we have some addresses and subnet masks go through each one and add to our structure... */
          /* multi_sz strings are terminated by two \0 in a row */

        ipptr = IpAddresses;
        subptr = SubNetMasks;
        Done2 = 0;
        while (!Done2)
        {
         if (sscanf(ipptr,"%s",oneIpAddress) != EOF)
           ipptr+= strlen(oneIpAddress) + 1; /* add one for terminator \0 */
         else Done2 = 1;
         
         if (sscanf(subptr,"%s",oneSubNetMask) != EOF)
           subptr += strlen(oneSubNetMask) + 1;
         else Done2 = 1;

         /* now add to interface structure */
         if (!Done2)                  
          {
           printf("IP address = %s \n",oneIpAddress);
           printf("Subnet mask = %s \n",oneSubNetMask);
           if (((char *)ipptr == '\0') || ((char *)subptr == '\0')) 
             Done = 1;

	     }
	    } // not done loop
        } // not temporary interface
       } // loop (while) through more things bound to MSTCP
 
    RegCloseKey(hk); // done with top while so close key
    return 0;
  }


void main()

 {
      get_win95_interfaces();
     
 }

