1 /* 2 * Copyright (c) 1980,1983,1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 * 12 * @(#)netdb.h 5.9 (Berkeley) 04/05/88 13 */ 14 15 /* 16 * Structures returned by network 17 * data base library. All addresses 18 * are supplied in host order, and 19 * returned in network order (suitable 20 * for use in system calls). 21 */ 22 struct hostent { 23 char *h_name; /* official name of host */ 24 char **h_aliases; /* alias list */ 25 int h_addrtype; /* host address type */ 26 int h_length; /* length of address */ 27 char **h_addr_list; /* list of addresses from name server */ 28 #define h_addr h_addr_list[0] /* address, for backward compatiblity */ 29 }; 30 31 /* 32 * Assumption here is that a network number 33 * fits in 32 bits -- probably a poor one. 34 */ 35 struct netent { 36 char *n_name; /* official name of net */ 37 char **n_aliases; /* alias list */ 38 int n_addrtype; /* net address type */ 39 unsigned long n_net; /* network # */ 40 }; 41 42 struct servent { 43 char *s_name; /* official service name */ 44 char **s_aliases; /* alias list */ 45 int s_port; /* port # */ 46 char *s_proto; /* protocol to use */ 47 }; 48 49 struct protoent { 50 char *p_name; /* official protocol name */ 51 char **p_aliases; /* alias list */ 52 int p_proto; /* protocol # */ 53 }; 54 55 struct hostent *gethostbyname(), *gethostbyaddr(), *gethostent(); 56 struct netent *getnetbyname(), *getnetbyaddr(), *getnetent(); 57 struct servent *getservbyname(), *getservbyport(), *getservent(); 58 struct protoent *getprotobyname(), *getprotobynumber(), *getprotoent(); 59 60 /* 61 * Error return codes from gethostbyname() and gethostbyaddr() 62 * (left in extern int h_errno). 63 */ 64 65 #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 66 #define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */ 67 #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 68 #define NO_DATA 4 /* Valid name, no data record of requested type */ 69 #define NO_ADDRESS NO_DATA /* no address, look for MX record */ 70