host name to IP address


 
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Old 04-11-2008
DNS server address

First of all make sure your have a working DNS server address. DNS server is responsible for converting domain name to a IP Address. Without a DNS server your codes output will be incorrect. Try to ping the name and see the DNS entry is correct.

example:
ping mail.gnu.org
ping www.gmail.com

---------------
Ram Das
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socket_to_name(3ncs)													      socket_to_name(3ncs)

Name
       socket_to_name - convert a socket address to a name and port number

Syntax
       #include <idl/c/socket.h>

       void socket_$to_name(sockaddr, slength, name, nlength, port, status)
       socket_$addr_t *sockaddr;
       unsigned long slength;
       socket_$string_t name;
       unsigned long *nlength;
       unsigned long *port;
       status_$t *status;

Arguments
       sockaddr 	   A socket address.  The socket address is the structure returned by either or

       slength		   The length, in bytes, of sockaddr.

       name		   A  string in the format family:host[port], where family is the address family and host is the host name; host may be in
			   the standard numeric form (for example, #192.1.2.3) if a textual host name cannot be obtained.  Currently, only  ip	is
			   supported for family.

       nlength		   On input, the maximum length, in bytes, of the name to be returned.	On output, the actual length of the name returned.

       port		   The port number.

       status		   The	completion status. If the completion status returned in is equal to status_$ok , then the routine that supplied it
			   was successful.

Description
       The routine converts a socket address to a textual address family, host name, and port number.

Files
See Also
       intro(3ncs), socket_family_to_name(3ncs), socket_from_name(3ncs), socket_to_numeric_name(3ncs)

															      socket_to_name(3ncs)