2.11BSD#431 - /usr/include/netdb.h

   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	5.9.3 (2.11BSD) 99/5/25
  13:  */
  14: 
  15: extern  int h_errno;
  16: 
  17: /*
  18:  * Structures returned by network
  19:  * data base library.  All addresses
  20:  * are supplied in host order, and
  21:  * returned in network order (suitable
  22:  * for 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: struct hostent  *gethostbyname(), *gethostbyaddr(), *gethostent();
  58: struct netent   *getnetbyname(), *getnetbyaddr(), *getnetent();
  59: struct servent  *getservbyname(), *getservbyport(), *getservent();
  60: struct protoent *getprotobyname(), *getprotobynumber(), *getprotoent();
  61: 
  62: /*
  63:  * Error return codes from gethostbyname() and gethostbyaddr()
  64:  * (left in extern int h_errno).
  65:  */
  66: 
  67: #define HOST_NOT_FOUND  1 /* Authoritative Answer Host not found */
  68: #define TRY_AGAIN   2 /* Non-Authoritive Host not found, or SERVERFAIL */
  69: #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
  70: #define NO_DATA     4 /* Valid name, no data record of requested type */
  71: #define NO_ADDRESS  NO_DATA     /* no address, look for MX record */

Defined struct's

Defined macros

Usage of this include