When gethostbyaddr is used, the name of the 11004 request is valid, but data of the Request type cannot be found.

// Todo: add the control notification handler code here
Wsadata WSD;
Word dwversion = makeword (2, 0 );
Struct in_addr ADDR;

Wsastartup (dwversion, & WSD );
Tchar * szaddr = "192.168.2.3 ";
Hostent * Host;

ADDR. s_addr = inet_addr (szaddr );

Host = gethostbyaddr (char *) & ADDR, 4, af_inet );
If (host)
{
M_list.addstring (host-> h_name );

}
Cstring TMP;
TMP. Format ("error: % d", wsagetlasterror ());
M_list.addstring (TMP );
Wsacleanup ();

 

 

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When I practiced this function, I encountered a 11004 error,

After finding the cause, it is found that the NetBIOS protocol must be enabled on the target host,

 

If this protocol is disabled, the retrieval fails.