| 1 | /* |
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| 2 | * netdb.h |
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| 3 | * |
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| 4 | * Copyright (c) 1980,1983,1988 Regents of the University of California. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms are permitted |
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| 8 | * provided that this notice is preserved and that due credit is given |
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| 9 | * to the University of California at Berkeley. The name of the University |
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| 10 | * may not be used to endorse or promote products derived from this |
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| 11 | * software without specific prior written permission. This software |
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| 12 | * is provided ``as is'' without express or implied warranty. |
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| 13 | * |
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| 14 | * $Id: netdb.h,v 1.1.1.1 1999-02-07 18:14:06 danw Exp $ |
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| 15 | */ |
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| 16 | |
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| 17 | /* |
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| 18 | * Structures returned by network |
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| 19 | * data base library. All addresses |
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| 20 | * are supplied in host order, and |
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| 21 | * returned in network order (suitable |
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| 22 | * for use in system calls). |
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| 23 | */ |
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| 24 | struct hostent { |
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| 25 | char *h_name; /* official name of host */ |
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| 26 | char **h_aliases; /* alias list */ |
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| 27 | int h_addrtype; /* host address type */ |
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| 28 | int h_length; /* length of address */ |
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| 29 | char **h_addr_list; /* list of addresses from name server */ |
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| 30 | #define h_addr h_addr_list[0] /* address, for backward compatiblity */ |
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| 31 | }; |
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| 32 | |
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| 33 | /* |
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| 34 | * Assumption here is that a network number |
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| 35 | * fits in 32 bits -- probably a poor one. |
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| 36 | */ |
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| 37 | struct netent { |
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| 38 | char *n_name; /* official name of net */ |
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| 39 | char **n_aliases; /* alias list */ |
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| 40 | int n_addrtype; /* net address type */ |
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| 41 | unsigned long n_net; /* network # */ |
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| 42 | }; |
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| 43 | |
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| 44 | struct servent { |
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| 45 | char *s_name; /* official service name */ |
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| 46 | char **s_aliases; /* alias list */ |
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| 47 | int s_port; /* port # */ |
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| 48 | char *s_proto; /* protocol to use */ |
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| 49 | }; |
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| 50 | |
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| 51 | struct protoent { |
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| 52 | char *p_name; /* official protocol name */ |
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| 53 | char **p_aliases; /* alias list */ |
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| 54 | int p_proto; /* protocol # */ |
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| 55 | }; |
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| 56 | |
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| 57 | struct hostent *gethostbyname(), *gethostbyaddr(), *gethostent(); |
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| 58 | struct netent *getnetbyname(), *getnetbyaddr(), *getnetent(); |
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| 59 | struct servent *getservbyname(), *getservbyport(), *getservent(); |
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| 60 | struct protoent *getprotobyname(), *getprotobynumber(), *getprotoent(); |
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| 61 | |
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| 62 | /* |
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| 63 | * Error return codes from gethostbyname() and gethostbyaddr() |
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| 64 | * (left in extern int h_errno). |
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| 65 | */ |
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| 66 | |
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| 67 | #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ |
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| 68 | #define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */ |
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| 69 | #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ |
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| 70 | #define NO_DATA 4 /* Valid name, no data record of requested type */ |
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| 71 | #define NO_ADDRESS NO_DATA /* no address, look for MX record */ |
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