82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* @(#)netdb.h 1.1 92/07/30 SMI from UCB 5.9 4/5/88 */
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/*
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* Copyright (c) 1980,1983,1988 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and that due credit is given
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* to the University of California at Berkeley. The name of the University
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* may not be used to endorse or promote products derived from this
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* software without specific prior written permission. This software
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* is provided ``as is'' without express or implied warranty.
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*/
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/*
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* Structures returned by network data base library.
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* All addresses are supplied in host order, and
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* returned in network order (suitable for use in system calls).
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*/
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#ifndef _netdb_h
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#define _netdb_h
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struct hostent {
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char *h_name; /* official name of host */
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char **h_aliases; /* alias list */
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int h_addrtype; /* host address type */
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int h_length; /* length of address */
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char **h_addr_list; /* list of addresses from name server */
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#define h_addr h_addr_list[0] /* address, for backward compatiblity */
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};
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/*
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* Assumption here is that a network number
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* fits in 32 bits -- probably a poor one.
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*/
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struct netent {
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char *n_name; /* official name of net */
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char **n_aliases; /* alias list */
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int n_addrtype; /* net address type */
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unsigned long n_net; /* network # */
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};
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struct servent {
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char *s_name; /* official service name */
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char **s_aliases; /* alias list */
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int s_port; /* port # */
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char *s_proto; /* protocol to use */
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};
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struct protoent {
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char *p_name; /* official protocol name */
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char **p_aliases; /* alias list */
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int p_proto; /* protocol # */
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};
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struct rpcent {
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char *r_name; /* name of server for this rpc program */
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char **r_aliases; /* alias list */
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int r_number; /* rpc program number */
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};
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struct hostent *gethostbyname(), *gethostbyaddr(), *gethostent();
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struct netent *getnetbyname(), *getnetbyaddr(), *getnetent();
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struct servent *getservbyname(), *getservbyport(), *getservent();
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struct protoent *getprotobyname(), *getprotobynumber(), *getprotoent();
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struct rpcent *getrpcbyname(), *getrpcbynumber(), *getrpcent();
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/*
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* Error return codes from gethostbyname() and gethostbyaddr()
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* (when using the resolver)
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*/
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extern int h_errno;
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#define HOST_NOT_FOUND 1 /* Authoritive Answer Host not found */
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#define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */
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#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
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#define NO_DATA 4 /* Valid name, no data record of requested type */
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#define NO_ADDRESS NO_DATA /* no address, look for MX record */
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#endif /*!_netdb_h*/
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