🚀 go-pugleaf

marka@halcyon.com (Mark Anacker) wrote:
> 
> But how do you tell the stack what it's own name is?  It doesn't seem to do
> a reverse lookup by address on either the DNS or the local hosts table, so
> it can't find it's own local name.  Thus gethostname() fails, and there's
> no way for an application to find out what it's IP address is...
> 
Yeah, but we do somehting along these lines and it works:

char   szBuff[100];
struct  hostent *hent;
int rc;
HANDLE hWLibSock;
FGETIP lpfnGetIpAddress;
unsigned long LocalIpAddress;

      if ((rc = gethostname(szBuff,sizeof(szBuff))) != 0)
         {
         rc = WSAGetLastError();
          etc....
         }
/* This little kludge is because the Novell Winsock library seems to
return a null string for gethostname. */
      if (strlen(szBuff) == 0)
       {
         /* first load the WLIBSOCK novell function library */
         hWLibSock = LoadLibrary("WLIBSOCK.DLL");
         if (hWLibSock < 32)
          {
               /* Oops, not installed */
          }
         else
          {
            lpfnGetIpAddress = (FGETIP) GetProcAddress( hWLibSock, 
"getmyipaddr");
            LocalIpAddress = lpfnGetIpAddress();
            FreeLibrary(hWLibSock); /* release the library */
            
          }
       }
      else
       {
         if ((hent = gethostbyname(szBuff)) == NULL)
             {
             rc = WSAGetLastError();
               etc..
             };
         _fmemcpy(LocalIpAddress,hent->h_addr_list[0],hent->h_length);
       }

Copyright 1995 Telstra Corp Ltd.

Glenn Baddeley,
Telstra ITG.

Now in return: Can someone please send me some code for PING
(ICMP echo request and reply), which preferably uses Novell
LWD Winsock.  Even any PING code whatsoever will do!!!