1 /*- 2 * Copyright (c) 1980, 1983, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)netdb.h 5.16 (Berkeley) 03/29/92 8 */ 9 10 #ifndef _NETDB_H_ 11 #define _NETDB_H_ 12 13 #define _PATH_HEQUIV "/etc/hosts.equiv" 14 #define _PATH_HOSTS "/etc/hosts" 15 #define _PATH_NETWORKS "/etc/networks" 16 #define _PATH_PROTOCOLS "/etc/protocols" 17 #define _PATH_SERVICES "/etc/services" 18 19 /* 20 * Structures returned by network data base library. All addresses are 21 * supplied in host order, and returned in network order (suitable for 22 * use in system calls). 23 */ 24 struct hostent { 25 char *h_name; /* official name of host */ 26 char **h_aliases; /* alias list */ 27 int h_addrtype; /* host address type */ 28 int h_length; /* length of address */ 29 char **h_addr_list; /* list of addresses from name server */ 30 #define h_addr h_addr_list[0] /* address, for backward compatiblity */ 31 }; 32 33 /* 34 * Assumption here is that a network number 35 * fits in 32 bits -- probably a poor one. 36 */ 37 struct netent { 38 char *n_name; /* official name of net */ 39 char **n_aliases; /* alias list */ 40 int n_addrtype; /* net address type */ 41 unsigned long n_net; /* network # */ 42 }; 43 44 struct servent { 45 char *s_name; /* official service name */ 46 char **s_aliases; /* alias list */ 47 int s_port; /* port # */ 48 char *s_proto; /* protocol to use */ 49 }; 50 51 struct protoent { 52 char *p_name; /* official protocol name */ 53 char **p_aliases; /* alias list */ 54 int p_proto; /* protocol # */ 55 }; 56 57 /* 58 * Error return codes from gethostbyname() and gethostbyaddr() 59 * (left in extern int h_errno). 60 */ 61 62 #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 63 #define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */ 64 #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 65 #define NO_DATA 4 /* Valid name, no data record of requested type */ 66 #define NO_ADDRESS NO_DATA /* no address, look for MX record */ 67 68 #include <sys/cdefs.h> 69 70 __BEGIN_DECLS 71 void endhostent __P((void)); 72 void endnetent __P((void)); 73 void endprotoent __P((void)); 74 void endservent __P((void)); 75 struct hostent *gethostbyaddr __P((const char *, int, int)); 76 struct hostent *gethostbyname __P((const char *)); 77 struct hostent *gethostent __P((void)); 78 struct netent *getnetbyaddr __P((long, int)); /* u_long? */ 79 struct netent *getnetbyname __P((const char *)); 80 struct netent *getnetent __P((void)); 81 struct protoent *getprotobyname __P((const char *)); 82 struct protoent *getprotobynumber __P((int)); 83 struct protoent *getprotoent __P((void)); 84 struct servent *getservbyname __P((const char *, const char *)); 85 struct servent *getservbyport __P((int, const char *)); 86 struct servent *getservent __P((void)); 87 void herror __P((const char *)); 88 void sethostent __P((int)); 89 /* void sethostfile __P((const char *)); */ 90 void setnetent __P((int)); 91 void setprotoent __P((int)); 92 void setservent __P((int)); 93 __END_DECLS 94 95 #endif /* !_NETDB_H_ */ 96