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461 lines
17 KiB
C
461 lines
17 KiB
C
/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place -
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Suite 330, Boston, MA 02111-1307, USA. */
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/* All data returned by the network data base library are supplied in
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host order and returned in network order (suitable for use in
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system calls). */
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#ifndef _NETDB_H
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#define _NETDB_H 1
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#include <features.h>
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/* This is necessary to make this include file properly replace the
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Sun version. */
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#include <rpc/netdb.h>
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#include <sys/socket.h> /* need socklen_t */
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#define __need_size_t
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#include <stddef.h>
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/* Absolute file name for network data base files. */
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#define _PATH_HEQUIV "/etc/hosts.equiv"
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#define _PATH_HOSTS "/etc/hosts"
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#define _PATH_NETWORKS "/etc/networks"
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#define _PATH_NSSWITCH_CONF "/etc/nsswitch.conf"
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#define _PATH_PROTOCOLS "/etc/protocols"
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#define _PATH_SERVICES "/etc/services"
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__BEGIN_DECLS
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/* Error status for non-reentrant lookup functions. */
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extern int h_errno;
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/* Function to get address of global `h_errno' variable. */
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extern int *__h_errno_location (void) __THROW __attribute__ ((__const__));
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#ifdef _LIBC
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# ifdef _LIBC_REENTRANT
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static inline int
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__set_h_errno (int __err)
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{
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return *__h_errno_location () = __err;
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}
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# else
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# define __set_h_errno(x) (h_errno = (x))
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# endif /* _LIBC_REENTRANT */
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#endif /* _LIBC */
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#if !defined _LIBC || defined _LIBC_REENTRANT
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/* Use a macro to access always the thread specific `h_errno' variable. */
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# define h_errno (*__h_errno_location ())
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#endif
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/* Possible values left in `h_errno'. */
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#define NETDB_INTERNAL -1 /* See errno. */
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#define NETDB_SUCCESS 0 /* No problem. */
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#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found. */
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#define TRY_AGAIN 2 /* Non-Authoritative Host not found,
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or SERVERFAIL. */
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#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED,
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NOTIMP. */
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#define NO_DATA 4 /* Valid name, no data record of requested
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type. */
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#define NO_ADDRESS NO_DATA /* No address, look for MX record. */
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/* Print error indicated by `h_errno' variable on standard error. STR
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if non-null is printed before the error string. */
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extern void herror (__const char *__str) __THROW;
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/* Return string associated with error ERR_NUM. */
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extern __const char *hstrerror (int __err_num) __THROW;
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/* Description of data base entry for a single host. */
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struct hostent
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{
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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 compatibility. */
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};
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/* Open host data base files and mark them as staying open even after
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a later search if STAY_OPEN is non-zero. */
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extern void sethostent (int __stay_open) __THROW;
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/* Close host data base files and clear `stay open' flag. */
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extern void endhostent (void) __THROW;
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/* Get next entry from host data base file. Open data base if
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necessary. */
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extern struct hostent *gethostent (void) __THROW;
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/* Return entry from host data base which address match ADDR with
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length LEN and type TYPE. */
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extern struct hostent *gethostbyaddr (__const char *__addr, size_t __len,
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int __type) __THROW;
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/* Return entry from host data base for host with NAME. */
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extern struct hostent *gethostbyname (__const char *__name) __THROW;
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/* Return entry from host data base for host with NAME. AF must be
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set to the address type which is `AF_INET' for IPv4 or `AF_INET6'
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for IPv6. */
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extern struct hostent *gethostbyname2 (__const char *__name, int __af) __THROW;
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#ifdef __USE_UNIX98
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/* Return entry from host data base which address match ADDR with
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length LEN and type TYPE in newly allocated buffer. */
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extern struct hostent *getipnodebyaddr (__const char *__addr, size_t __len,
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int __type, int *__error_num) __THROW;
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/* Return entry from host data base for host with NAME and newly allocated
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buffer. FLAGS is some combination of the following AI_* values. */
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extern struct hostent *getipnodebyname (__const char *__name, int __type,
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int __flags, int *__error_num) __THROW;
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# define AI_V4MAPPED 1 /* IPv4-mapped addresses are acceptable. */
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# define AI_ALL 2 /* Return both IPv4 and IPv6 addresses. */
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# define AI_ADDRCONFIG 4 /* Use configuration of this host to choose
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returned address type. */
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# define AI_DEFAULT (AI_V4MAPPED | AI_ADDRCONFIG)
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/* Free structure returned by previous `getipnodebyaddr' or `getipnodebyname'
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call. */
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extern void freehostent (struct hostent *__ptr) __THROW;
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#endif
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#ifdef __USE_MISC
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/* Reentrant versions of the functions above. The additional
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arguments specify a buffer of BUFLEN starting at BUF. The last
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argument is a pointer to a variable which gets the value which
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would be stored in the global variable `herrno' by the
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non-reentrant functions. */
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extern int gethostent_r (struct hostent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct hostent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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extern int gethostbyaddr_r (__const char *__restrict __addr, size_t __len,
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int __type,
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struct hostent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct hostent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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extern int gethostbyname_r (__const char *__restrict __name,
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struct hostent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct hostent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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extern int gethostbyname2_r (__const char *__restrict __name, int __af,
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struct hostent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct hostent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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#endif /* misc */
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/* Description of data base entry for a single network. NOTE: here a
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poor assumption is made. The network number is expected to fit
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into an unsigned long int variable. */
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struct netent
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{
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char *n_name; /* Official name of network. */
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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 int n_net; /* Network number. */
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};
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/* Open network data base files and mark them as staying open even
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after a later search if STAY_OPEN is non-zero. */
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extern void setnetent (int __stay_open) __THROW;
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/* Close network data base files and clear `stay open' flag. */
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extern void endnetent (void) __THROW;
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/* Get next entry from network data base file. Open data base if
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necessary. */
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extern struct netent *getnetent (void) __THROW;
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/* Return entry from network data base which address match NET and
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type TYPE. */
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extern struct netent *getnetbyaddr (unsigned long int __net, int __type)
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__THROW;
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/* Return entry from network data base for network with NAME. */
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extern struct netent *getnetbyname (__const char *__name) __THROW;
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#ifdef __USE_MISC
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/* Reentrant versions of the functions above. The additional
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arguments specify a buffer of BUFLEN starting at BUF. The last
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argument is a pointer to a variable which gets the value which
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would be stored in the global variable `herrno' by the
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non-reentrant functions. */
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extern int getnetent_r (struct netent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct netent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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extern int getnetbyaddr_r (unsigned long int __net, int __type,
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struct netent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct netent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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extern int getnetbyname_r (__const char *__restrict __name,
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struct netent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct netent **__restrict __result,
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int *__restrict __h_errnop) __THROW;
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#endif /* misc */
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/* Description of data base entry for a single service. */
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struct servent
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{
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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 number. */
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char *s_proto; /* Protocol to use. */
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};
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/* Open service data base files and mark them as staying open even
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after a later search if STAY_OPEN is non-zero. */
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extern void setservent (int __stay_open) __THROW;
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/* Close service data base files and clear `stay open' flag. */
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extern void endservent (void) __THROW;
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/* Get next entry from service data base file. Open data base if
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necessary. */
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extern struct servent *getservent (void) __THROW;
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/* Return entry from network data base for network with NAME and
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protocol PROTO. */
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extern struct servent *getservbyname (__const char *__name,
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__const char *__proto) __THROW;
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/* Return entry from service data base which matches port PORT and
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protocol PROTO. */
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extern struct servent *getservbyport (int __port, __const char *__proto)
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__THROW;
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#ifdef __USE_MISC
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/* Reentrant versions of the functions above. The additional
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arguments specify a buffer of BUFLEN starting at BUF. */
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extern int getservent_r (struct servent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct servent **__restrict __result) __THROW;
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extern int getservbyname_r (__const char *__restrict __name,
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__const char *__restrict __proto,
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struct servent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct servent **__restrict __result) __THROW;
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extern int getservbyport_r (int __port, __const char *__restrict __proto,
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struct servent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct servent **__restrict __result) __THROW;
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#endif /* misc */
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/* Description of data base entry for a single service. */
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struct protoent
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{
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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 number. */
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};
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/* Open protocol data base files and mark them as staying open even
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after a later search if STAY_OPEN is non-zero. */
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extern void setprotoent (int __stay_open) __THROW;
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/* Close protocol data base files and clear `stay open' flag. */
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extern void endprotoent (void) __THROW;
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/* Get next entry from protocol data base file. Open data base if
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necessary. */
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extern struct protoent *getprotoent (void) __THROW;
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/* Return entry from protocol data base for network with NAME. */
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extern struct protoent *getprotobyname (__const char *__name) __THROW;
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/* Return entry from protocol data base which number is PROTO. */
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extern struct protoent *getprotobynumber (int __proto) __THROW;
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#ifdef __USE_MISC
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/* Reentrant versions of the functions above. The additional
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arguments specify a buffer of BUFLEN starting at BUF. */
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extern int getprotoent_r (struct protoent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct protoent **__restrict __result) __THROW;
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extern int getprotobyname_r (__const char *__restrict __name,
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struct protoent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct protoent **__restrict __result) __THROW;
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extern int getprotobynumber_r (int __proto,
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struct protoent *__restrict __result_buf,
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char *__restrict __buf, size_t __buflen,
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struct protoent **__restrict __result) __THROW;
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#endif /* misc */
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/* Establish network group NETGROUP for enumeration. */
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extern int setnetgrent (__const char *__netgroup) __THROW;
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/* Free all space allocated by previous `setnetgrent' call. */
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extern void endnetgrent (void) __THROW;
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/* Get next member of netgroup established by last `setnetgrent' call
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and return pointers to elements in HOSTP, USERP, and DOMAINP. */
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extern int getnetgrent (char **__restrict __hostp,
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char **__restrict __userp,
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char **__restrict __domainp) __THROW;
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/* Test whether NETGROUP contains the triple (HOST,USER,DOMAIN). */
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extern int innetgr (__const char *__netgroup, __const char *__host,
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__const char *__user, __const char *domain) __THROW;
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#ifdef __USE_MISC
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/* Reentrant version of `getnetgrent' where result is placed in BUFFER. */
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extern int getnetgrent_r (char **__restrict __hostp,
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char **__restrict __userp,
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char **__restrict __domainp,
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char *__restrict __buffer, size_t __buflen) __THROW;
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#endif /* misc */
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#ifdef __USE_BSD
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/* Call `rshd' at port RPORT on remote machine *AHOST to execute CMD.
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The local user is LOCUSER, on the remote machine the command is
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executed as REMUSER. In *FD2P the descriptor to the socket for the
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connection is returned. The caller must have the right to use a
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reserved port. When the function returns *AHOST contains the
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official host name. */
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extern int rcmd (char **__restrict __ahost, unsigned short int __rport,
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__const char *__restrict __locuser,
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__const char *__restrict __remuser,
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__const char *__restrict __cmd, int *__restrict __fd2p)
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__THROW;
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/* Call `rexecd' at port RPORT on remote machine *AHOST to execute
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CMD. The process runs at the remote machine using the ID of user
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NAME whose cleartext password is PASSWD. In *FD2P the descriptor
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to the socket for the connection is returned. When the function
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returns *AHOST contains the official host name. */
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extern int rexec (char **__restrict __ahost, int __rport,
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__const char *__restrict __name,
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__const char *__restrict __pass,
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__const char *__restrict __cmd, int *__restrict __fd2p)
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__THROW;
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/* Check whether user REMUSER on system RHOST is allowed to login as LOCUSER.
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If SUSER is not zero the user tries to become superuser. Return 0 if
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it is possible. */
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extern int ruserok (__const char *__rhost, int __suser,
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__const char *__remuser, __const char *__locuser) __THROW;
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/* Try to allocate reserved port, returning a descriptor for a socket opened
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at this port or -1 if unsuccessful. The search for an available port
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will start at ALPORT and continues with lower numbers. */
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extern int rresvport (int *__alport) __THROW;
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#endif
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/* Extension from POSIX.1g. */
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#ifdef __USE_POSIX
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/* Structure to contain information about address of a service provider. */
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struct addrinfo
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{
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int ai_flags; /* Input flags. */
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int ai_family; /* Protocol family for socket. */
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int ai_socktype; /* Socket type. */
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int ai_protocol; /* Protocol for socket. */
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int ai_addrlen; /* Length of socket address. */
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struct sockaddr *ai_addr; /* Socket address for socket. */
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char *ai_canonname; /* Canonical name for service location. */
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struct addrinfo *ai_next; /* Pointer to next in list. */
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};
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/* Possible values for `ai_flags' field in `addrinfo' structure. */
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# define AI_PASSIVE 1 /* Socket address is intended for `bind'. */
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# define AI_CANONNAME 2 /* Request for canonical name. */
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# define AI_NUMERICHOST 4 /* Don't use name resolution. */
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/* Error values for `getaddrinfo' function. */
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# define EAI_BADFLAGS -1 /* Invalid value for `ai_flags' field. */
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# define EAI_NONAME -2 /* NAME or SERVICE is unknown. */
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# define EAI_AGAIN -3 /* Temporary failure in name resolution. */
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# define EAI_FAIL -4 /* Non-recoverable failure in name res. */
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# define EAI_NODATA -5 /* No address associated with NAME. */
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# define EAI_FAMILY -6 /* `ai_family' not supported. */
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# define EAI_SOCKTYPE -7 /* `ai_socktype' not supported. */
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# define EAI_SERVICE -8 /* SERVICE not supported for `ai_socktype'. */
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# define EAI_ADDRFAMILY -9 /* Address family for NAME not supported. */
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# define EAI_MEMORY -10 /* Memory allocation failure. */
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# define EAI_SYSTEM -11 /* System error returned in `errno'. */
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# define NI_MAXHOST 1025
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# define NI_MAXSERV 32
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# define NI_NUMERICHOST 1 /* Don't try to look up hostname. */
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# define NI_NUMERICSERV 2 /* Don't convert port number to name. */
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# define NI_NOFQDN 4 /* Only return nodename portion. */
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# define NI_NAMEREQD 8 /* Don't return numeric addresses. */
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# define NI_DGRAM 16 /* Look up UDP service rather than TCP. */
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/* Translate name of a service location and/or a service name to set of
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socket addresses. */
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extern int getaddrinfo (__const char *__restrict __name,
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__const char *__restrict __service,
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__const struct addrinfo *__restrict __req,
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struct addrinfo **__restrict __pai) __THROW;
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/* Free `addrinfo' structure AI including associated storage. */
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extern void freeaddrinfo (struct addrinfo *__ai) __THROW;
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/* Convert error return from getaddrinfo() to a string. */
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extern char *gai_strerror (int __ecode) __THROW;
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/* Translate a socket address to a location and service name. */
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extern int getnameinfo (__const struct sockaddr *__restrict __sa,
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socklen_t __salen, char *__restrict __host,
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size_t __hostlen, char *__restrict __serv,
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size_t __servlen, int __flags) __THROW;
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#endif /* POSIX */
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__END_DECLS
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#endif /* netdb.h */
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