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/* Copyright (C) 1996,97,98,99,2000,01,02 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* All data returned by the network data base library are supplied in
host order and returned in network order (suitable for use in
system calls). */
#ifndef _NETDB_H
#define _NETDB_H 1
#include <features.h>
#include <netinet/in.h>
#include <stdint.h>
#ifdef __USE_MISC
/* This is necessary to make this include file properly replace the
Sun version. */
# include <rpc/netdb.h>
#endif
#ifdef __USE_GNU
# define __need_sigevent_t
# include <bits/siginfo.h>
# define __need_timespec
# include <time.h>
#endif
#include <bits/netdb.h>
/* Absolute file name for network data base files. */
#define _PATH_HEQUIV "/etc/hosts.equiv"
#define _PATH_HOSTS "/etc/hosts"
#define _PATH_NETWORKS "/etc/networks"
#define _PATH_NSSWITCH_CONF "/etc/nsswitch.conf"
#define _PATH_PROTOCOLS "/etc/protocols"
#define _PATH_SERVICES "/etc/services"
__BEGIN_DECLS
/* Error status for non-reentrant lookup functions.
We use a macro to access always the thread-specific `h_errno' variable. */
#define h_errno (*__h_errno_location ())
/* Function to get address of global `h_errno' variable. */
extern int *__h_errno_location (void) __THROW __attribute__ ((__const__));
/* Possible values left in `h_errno'. */
#define NETDB_INTERNAL -1 /* See errno. */
#define NETDB_SUCCESS 0 /* No problem. */
#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found. */
#define TRY_AGAIN 2 /* Non-Authoritative Host not found,
or SERVERFAIL. */
#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED,
NOTIMP. */
#define NO_DATA 4 /* Valid name, no data record of requested
type. */
#define NO_ADDRESS NO_DATA /* No address, look for MX record. */
#ifdef __USE_XOPEN2K
/* Highest reserved Internet port number. */
# define IPPORT_RESERVED 1024
#endif
#ifdef __USE_GNU
/* Scope delimiter for getaddrinfo(), getnameinfo(). */
# define SCOPE_DELIMITER '%'
#endif
/* Print error indicated by `h_errno' variable on standard error. STR
if non-null is printed before the error string. */
extern void herror (__const char *__str) __THROW;
/* Return string associated with error ERR_NUM. */
extern __const char *hstrerror (int __err_num) __THROW;
/* Description of data base entry for a single host. */
struct hostent
{
char *h_name; /* Official name of host. */
char **h_aliases; /* Alias list. */
int h_addrtype; /* Host address type. */
int h_length; /* Length of address. */
char **h_addr_list; /* List of addresses from name server. */
#define h_addr h_addr_list[0] /* Address, for backward compatibility. */
};
/* Open host data base files and mark them as staying open even after
a later search if STAY_OPEN is non-zero. */
extern void sethostent (int __stay_open) __THROW;
/* Close host data base files and clear `stay open' flag. */
extern void endhostent (void) __THROW;
/* Get next entry from host data base file. Open data base if
necessary. */
extern struct hostent *gethostent (void) __THROW;
/* Return entry from host data base which address match ADDR with
length LEN and type TYPE. */
extern struct hostent *gethostbyaddr (__const void *__addr, __socklen_t __len,
int __type) __THROW;
/* Return entry from host data base for host with NAME. */
extern struct hostent *gethostbyname (__const char *__name) __THROW;
#ifdef __USE_MISC
/* Return entry from host data base for host with NAME. AF must be
set to the address type which is `AF_INET' for IPv4 or `AF_INET6'
for IPv6. */
extern struct hostent *gethostbyname2 (__const char *__name, int __af) __THROW;
/* Reentrant versions of the functions above. The additional
arguments specify a buffer of BUFLEN starting at BUF. The last
argument is a pointer to a variable which gets the value which
would be stored in the global variable `herrno' by the
non-reentrant functions. */
extern int gethostent_r (struct hostent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct hostent **__restrict __result,
int *__restrict __h_errnop) __THROW;
extern int gethostbyaddr_r (__const void *__restrict __addr, __socklen_t __len,
int __type,
struct hostent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct hostent **__restrict __result,
int *__restrict __h_errnop) __THROW;
extern int gethostbyname_r (__const char *__restrict __name,
struct hostent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct hostent **__restrict __result,
int *__restrict __h_errnop) __THROW;
extern int gethostbyname2_r (__const char *__restrict __name, int __af,
struct hostent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct hostent **__restrict __result,
int *__restrict __h_errnop) __THROW;
#endif /* misc */
/* Open network data base files and mark them as staying open even
after a later search if STAY_OPEN is non-zero. */
extern void setnetent (int __stay_open) __THROW;
/* Close network data base files and clear `stay open' flag. */
extern void endnetent (void) __THROW;
/* Get next entry from network data base file. Open data base if
necessary. */
extern struct netent *getnetent (void) __THROW;
/* Return entry from network data base which address match NET and
type TYPE. */
extern struct netent *getnetbyaddr (uint32_t __net, int __type)
__THROW;
/* Return entry from network data base for network with NAME. */
extern struct netent *getnetbyname (__const char *__name) __THROW;
#ifdef __USE_MISC
/* Reentrant versions of the functions above. The additional
arguments specify a buffer of BUFLEN starting at BUF. The last
argument is a pointer to a variable which gets the value which
would be stored in the global variable `herrno' by the
non-reentrant functions. */
extern int getnetent_r (struct netent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct netent **__restrict __result,
int *__restrict __h_errnop) __THROW;
extern int getnetbyaddr_r (uint32_t __net, int __type,
struct netent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct netent **__restrict __result,
int *__restrict __h_errnop) __THROW;
extern int getnetbyname_r (__const char *__restrict __name,
struct netent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct netent **__restrict __result,
int *__restrict __h_errnop) __THROW;
#endif /* misc */
/* Description of data base entry for a single service. */
struct servent
{
char *s_name; /* Official service name. */
char **s_aliases; /* Alias list. */
int s_port; /* Port number. */
char *s_proto; /* Protocol to use. */
};
/* Open service data base files and mark them as staying open even
after a later search if STAY_OPEN is non-zero. */
extern void setservent (int __stay_open) __THROW;
/* Close service data base files and clear `stay open' flag. */
extern void endservent (void) __THROW;
/* Get next entry from service data base file. Open data base if
necessary. */
extern struct servent *getservent (void) __THROW;
/* Return entry from network data base for network with NAME and
protocol PROTO. */
extern struct servent *getservbyname (__const char *__name,
__const char *__proto) __THROW;
/* Return entry from service data base which matches port PORT and
protocol PROTO. */
extern struct servent *getservbyport (int __port, __const char *__proto)
__THROW;
#ifdef __USE_MISC
/* Reentrant versions of the functions above. The additional
arguments specify a buffer of BUFLEN starting at BUF. */
extern int getservent_r (struct servent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct servent **__restrict __result) __THROW;
extern int getservbyname_r (__const char *__restrict __name,
__const char *__restrict __proto,
struct servent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct servent **__restrict __result) __THROW;
extern int getservbyport_r (int __port, __const char *__restrict __proto,
struct servent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct servent **__restrict __result) __THROW;
#endif /* misc */
/* Description of data base entry for a single service. */
struct protoent
{
char *p_name; /* Official protocol name. */
char **p_aliases; /* Alias list. */
int p_proto; /* Protocol number. */
};
/* Open protocol data base files and mark them as staying open even
after a later search if STAY_OPEN is non-zero. */
extern void setprotoent (int __stay_open) __THROW;
/* Close protocol data base files and clear `stay open' flag. */
extern void endprotoent (void) __THROW;
/* Get next entry from protocol data base file. Open data base if
necessary. */
extern struct protoent *getprotoent (void) __THROW;
/* Return entry from protocol data base for network with NAME. */
extern struct protoent *getprotobyname (__const char *__name) __THROW;
/* Return entry from protocol data base which number is PROTO. */
extern struct protoent *getprotobynumber (int __proto) __THROW;
#ifdef __USE_MISC
/* Reentrant versions of the functions above. The additional
arguments specify a buffer of BUFLEN starting at BUF. */
extern int getprotoent_r (struct protoent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct protoent **__restrict __result) __THROW;
extern int getprotobyname_r (__const char *__restrict __name,
struct protoent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct protoent **__restrict __result) __THROW;
extern int getprotobynumber_r (int __proto,
struct protoent *__restrict __result_buf,
char *__restrict __buf, size_t __buflen,
struct protoent **__restrict __result) __THROW;
#endif /* misc */
/* Establish network group NETGROUP for enumeration. */
extern int setnetgrent (__const char *__netgroup) __THROW;
/* Free all space allocated by previous `setnetgrent' call. */
extern void endnetgrent (void) __THROW;
/* Get next member of netgroup established by last `setnetgrent' call
and return pointers to elements in HOSTP, USERP, and DOMAINP. */
extern int getnetgrent (char **__restrict __hostp,
char **__restrict __userp,
char **__restrict __domainp) __THROW;
#ifdef __USE_MISC
/* Test whether NETGROUP contains the triple (HOST,USER,DOMAIN). */
extern int innetgr (__const char *__netgroup, __const char *__host,
__const char *__user, __const char *domain) __THROW;
/* Reentrant version of `getnetgrent' where result is placed in BUFFER. */
extern int getnetgrent_r (char **__restrict __hostp,
char **__restrict __userp,
char **__restrict __domainp,
char *__restrict __buffer, size_t __buflen) __THROW;
#endif /* misc */
#ifdef __USE_BSD
/* Call `rshd' at port RPORT on remote machine *AHOST to execute CMD.
The local user is LOCUSER, on the remote machine the command is
executed as REMUSER. In *FD2P the descriptor to the socket for the
connection is returned. The caller must have the right to use a
reserved port. When the function returns *AHOST contains the
official host name. */
extern int rcmd (char **__restrict __ahost, unsigned short int __rport,
__const char *__restrict __locuser,
__const char *__restrict __remuser,
__const char *__restrict __cmd, int *__restrict __fd2p)
__THROW;
/* This is the equivalent function where the protocol can be selected
and which therefore can be used for IPv6. */
extern int rcmd_af (char **__restrict __ahost, unsigned short int __rport,
__const char *__restrict __locuser,
__const char *__restrict __remuser,
__const char *__restrict __cmd, int *__restrict __fd2p,
sa_family_t __af) __THROW;
/* Call `rexecd' at port RPORT on remote machine *AHOST to execute
CMD. The process runs at the remote machine using the ID of user
NAME whose cleartext password is PASSWD. In *FD2P the descriptor
to the socket for the connection is returned. When the function
returns *AHOST contains the official host name. */
extern int rexec (char **__restrict __ahost, int __rport,
__const char *__restrict __name,
__const char *__restrict __pass,
__const char *__restrict __cmd, int *__restrict __fd2p)
__THROW;
/* This is the equivalent function where the protocol can be selected
and which therefore can be used for IPv6. */
extern int rexec_af (char **__restrict __ahost, int __rport,
__const char *__restrict __name,
__const char *__restrict __pass,
__const char *__restrict __cmd, int *__restrict __fd2p,
sa_family_t __af) __THROW;
/* Check whether user REMUSER on system RHOST is allowed to login as LOCUSER.
If SUSER is not zero the user tries to become superuser. Return 0 if
it is possible. */
extern int ruserok (__const char *__rhost, int __suser,
__const char *__remuser, __const char *__locuser) __THROW;
/* This is the equivalent function where the protocol can be selected
and which therefore can be used for IPv6. */
extern int ruserok_af (__const char *__rhost, int __suser,
__const char *__remuser, __const char *__locuser,
sa_family_t __af) __THROW;
/* Try to allocate reserved port, returning a descriptor for a socket opened
at this port or -1 if unsuccessful. The search for an available port
will start at ALPORT and continues with lower numbers. */
extern int rresvport (int *__alport) __THROW;
/* This is the equivalent function where the protocol can be selected
and which therefore can be used for IPv6. */
extern int rresvport_af (int *__alport, sa_family_t __af) __THROW;
#endif
/* Extension from POSIX.1g. */
#ifdef __USE_POSIX
/* Structure to contain information about address of a service provider. */
struct addrinfo
{
int ai_flags; /* Input flags. */
int ai_family; /* Protocol family for socket. */
int ai_socktype; /* Socket type. */
int ai_protocol; /* Protocol for socket. */
socklen_t ai_addrlen; /* Length of socket address. */
struct sockaddr *ai_addr; /* Socket address for socket. */
char *ai_canonname; /* Canonical name for service location. */
struct addrinfo *ai_next; /* Pointer to next in list. */
};
# ifdef __USE_GNU
/* Structure used as control block for asynchronous lookup. */
struct gaicb
{
const char *ar_name; /* Name to look up. */
const char *ar_service; /* Service name. */
const struct addrinfo *ar_request; /* Additional request specification. */
struct addrinfo *ar_result; /* Pointer to result. */
/* The following are internal elements. */
int __return;
int __unused[5];
};
/* Lookup mode. */
# define GAI_WAIT 0
# define GAI_NOWAIT 1
# endif
/* Possible values for `ai_flags' field in `addrinfo' structure. */
# define AI_PASSIVE 0x0001 /* Socket address is intended for `bind'. */
# define AI_CANONNAME 0x0002 /* Request for canonical name. */
# define AI_NUMERICHOST 0x0004 /* Don't use name resolution. */
/* Error values for `getaddrinfo' function. */
# define EAI_BADFLAGS -1 /* Invalid value for `ai_flags' field. */
# define EAI_NONAME -2 /* NAME or SERVICE is unknown. */
# define EAI_AGAIN -3 /* Temporary failure in name resolution. */
# define EAI_FAIL -4 /* Non-recoverable failure in name res. */
# define EAI_NODATA -5 /* No address associated with NAME. */
# define EAI_FAMILY -6 /* `ai_family' not supported. */
# define EAI_SOCKTYPE -7 /* `ai_socktype' not supported. */
# define EAI_SERVICE -8 /* SERVICE not supported for `ai_socktype'. */
# define EAI_ADDRFAMILY -9 /* Address family for NAME not supported. */
# define EAI_MEMORY -10 /* Memory allocation failure. */
# define EAI_SYSTEM -11 /* System error returned in `errno'. */
# ifdef __USE_GNU
# define EAI_INPROGRESS -100 /* Processing request in progress. */
# define EAI_CANCELED -101 /* Request canceled. */
# define EAI_NOTCANCELED -102 /* Request not canceled. */
# define EAI_ALLDONE -103 /* All requests done. */
# define EAI_INTR -104 /* Interrupted by a signal. */
# endif
# define NI_MAXHOST 1025
# define NI_MAXSERV 32
# define NI_NUMERICHOST 1 /* Don't try to look up hostname. */
# define NI_NUMERICSERV 2 /* Don't convert port number to name. */
# define NI_NOFQDN 4 /* Only return nodename portion. */
# define NI_NAMEREQD 8 /* Don't return numeric addresses. */
# define NI_DGRAM 16 /* Look up UDP service rather than TCP. */
/* Translate name of a service location and/or a service name to set of
socket addresses. */
extern int getaddrinfo (__const char *__restrict __name,
__const char *__restrict __service,
__const struct addrinfo *__restrict __req,
struct addrinfo **__restrict __pai) __THROW;
/* Free `addrinfo' structure AI including associated storage. */
extern void freeaddrinfo (struct addrinfo *__ai) __THROW;
/* Convert error return from getaddrinfo() to a string. */
extern __const char *gai_strerror (int __ecode) __THROW;
/* Translate a socket address to a location and service name. */
extern int getnameinfo (__const struct sockaddr *__restrict __sa,
socklen_t __salen, char *__restrict __host,
socklen_t __hostlen, char *__restrict __serv,
socklen_t __servlen, unsigned int __flags) __THROW;
# ifdef __USE_GNU
/* Enqueue ENT requests from the LIST. If MODE is GAI_WAIT wait until all
requests are handled. If WAIT is GAI_NOWAIT return immediately after
queueing the requests and signal completion according to SIG. */
extern int getaddrinfo_a (int __mode, struct gaicb *__list[__restrict_arr],
int __ent, struct sigevent *__restrict __sig)
__THROW;
/* Suspend execution of the thread until at least one of the ENT requests
in LIST is handled. If TIMEOUT is not a null pointer it specifies the
longest time the function keeps waiting before returning with an error. */
extern int gai_suspend (__const struct gaicb *__const __list[], int __ent,
__const struct timespec *__timeout) __THROW;
/* Get the error status of the request REQ. */
extern int gai_error (struct gaicb *__req) __THROW;
/* Cancel the requests associated with GAICBP. */
extern int gai_cancel (struct gaicb *__gaicbp) __THROW;
# endif /* GNU */
#endif /* POSIX */
__END_DECLS
#endif /* netdb.h */
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