sunos man page for netdb

netdb.h(3HEAD)							      Headers							    netdb.h(3HEAD)

NAME
       netdb.h, netdb - definitions for network database operations

SYNOPSIS
       #include <netdb.h>

DESCRIPTION
       The <netdb.h> header defines the type in_port_t and the type in_addr_t as described in in.h(3HEAD).

       The <netdb.h> header defines the hostent structure that includes the following members:

       char *h_name	    /* official name of the host */
       char **h_aliases     /* pointer to an array of pointers to alternative */
			    /* host names, terminated by a null pointer */
       int  h_addrtype	    /* address type */
       int  h_length	    /* length, in bytes, of the address */
       char **h_addr_list   /* pointer to an array of pointers to network addresses */
			    /* (in network byte order) for the host, terminated by a */
			    /* null pointer */

       The <netdb.h> header defines the netent structure that includes the following members:

       char	 *n_name	 /* official, fully-qualified (including the domain) name */
				 /* of the network */
       char	 **n_aliases	 /* pointer to an array of pointers to alternative */
				 /* network names, terminated by a null pointer */
       int	 n_addrtype	 /* the address type of the network */
       in_addr_t n_net		 /* the network number, in host byte order */

       The <netdb.h> header defines the protoent structure that includes the following members:

       char *p_name	    /* official name of the protocol */
       char **p_aliases     /* pointer to an array of pointers to alternative */
			    /* protocol names, terminated by a null pointer */
       int  p_proto	    /* protocol number */

       The <netdb.h> header defines the servent structure that includes the following members:

       char *s_name	    /* fficial name of the service */
       char **s_aliases     /* pointer to an array of pointers to alternative */
			    /* service names, terminated by a null pointer */
       int  s_port	    /* port number at which the service resides, */
			    /* in network byte order */
       char *s_proto	    /* name of the protocol to use when */
			    /* contacting the service */

       The <netdb.h> header defines the macro IPPORT_RESERVED with the value of the highest reserved Internet port number.

       The <netdb.h> header provides a declaration for h_errno:

	      extern int h_errno;

       The <netdb.h> header defines the following macros for use as error values for gethostbyaddr() and gethostbyname():

       HOST_NOT_FOUND	   NO_DATA

       NO_RECOVERY	   TRY_AGAIN

       Inclusion of the <netdb.h> header may also make visible all symbols from in.h(3HEAD).

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       intro(3),  endhostent(3NSL),  endhostent(3XNET),  endnetent(3SOCKET),  endnetent(3XNET),  endprotoent(3SOCKET), endprotoent(3XNET), endser-
       vent(3SOCKET), endservent(3XNET), in.h(3HEAD), attributes(5), standards(5)

SunOS 5.10							    10 Sep 2004 						    netdb.h(3HEAD)