mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 19:40:06 +00:00
5da9f08469
* resolv/netdb.h: Adjust parameters of gethostbyaddr and gethostbyaddr_r. * inet/gethstbyad.c: Correct type of len parameter. * inet/gethstbyad_r.c: Likewise.
450 lines
17 KiB
C
450 lines
17 KiB
C
/* Copyright (C) 1996, 1997, 1998, 1999 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 Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 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 Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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>
|
|
|
|
/* This is necessary to make this include file properly replace the
|
|
Sun version. */
|
|
#include <rpc/netdb.h>
|
|
#include <sys/socket.h> /* need socklen_t */
|
|
#define __need_size_t
|
|
#include <stddef.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. */
|
|
extern int h_errno;
|
|
|
|
/* Function to get address of global `h_errno' variable. */
|
|
extern int *__h_errno_location __P ((void)) __attribute__ ((__const__));
|
|
|
|
#ifdef _LIBC
|
|
# ifdef _LIBC_REENTRANT
|
|
static inline int
|
|
__set_h_errno (int __err)
|
|
{
|
|
return *__h_errno_location () = __err;
|
|
}
|
|
# else
|
|
# define __set_h_errno(x) (h_errno = (x))
|
|
# endif /* _LIBC_REENTRANT */
|
|
#endif /* _LIBC */
|
|
|
|
|
|
#if !defined _LIBC || defined _LIBC_REENTRANT
|
|
/* Use a macro to access always the thread specific `h_errno' variable. */
|
|
# define h_errno (*__h_errno_location ())
|
|
#endif
|
|
|
|
|
|
/* 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. */
|
|
|
|
/* Print error indicated by `h_errno' variable on standard error. STR
|
|
if non-null is printed before the error string. */
|
|
extern void herror __P ((__const char *__str));
|
|
|
|
/* Return string associated with error ERR_NUM. */
|
|
extern __const char *hstrerror __P ((int __err_num));
|
|
|
|
|
|
|
|
/* 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 __P ((int __stay_open));
|
|
|
|
/* Close host data base files and clear `stay open' flag. */
|
|
extern void endhostent __P ((void));
|
|
|
|
/* Get next entry from host data base file. Open data base if
|
|
necessary. */
|
|
extern struct hostent *gethostent __P ((void));
|
|
|
|
/* Return entry from host data base which address match ADDR with
|
|
length LEN and type TYPE. */
|
|
extern struct hostent *gethostbyaddr __P ((__const char *__addr, size_t __len,
|
|
int __type));
|
|
|
|
/* Return entry from host data base for host with NAME. */
|
|
extern struct hostent *gethostbyname __P ((__const char *__name));
|
|
|
|
/* 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 __P ((__const char *__name, int __af));
|
|
|
|
#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 gethostent_r __P ((struct hostent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct hostent **__restrict __result,
|
|
int *__restrict __h_errnop));
|
|
|
|
extern int gethostbyaddr_r __P ((__const char *__restrict __addr, size_t __len,
|
|
int __type,
|
|
struct hostent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct hostent **__restrict __result,
|
|
int *__restrict __h_errnop));
|
|
|
|
extern int gethostbyname_r __P ((__const char *__restrict __name,
|
|
struct hostent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct hostent **__restrict __result,
|
|
int *__restrict __h_errnop));
|
|
|
|
extern int gethostbyname2_r __P ((__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));
|
|
#endif /* misc */
|
|
|
|
|
|
/* Return entry from host data base for host with NAME. AF must be
|
|
set to the desired address type (either `AF_INET' or `AF_INET6').
|
|
FLAGS is some combination of the following AI_* values. */
|
|
extern struct hostent *getnodebyname __P ((__const char *__name, int __af,
|
|
int __flags));
|
|
|
|
#define AI_V4MAPPED 1 /* IPv4-mapped addresses are acceptable. */
|
|
#define AI_ALL 2 /* Return both IPv4 and IPv6 addresses. */
|
|
#define AI_ADDRCONFIG 4 /* Use configuration of this host to choose
|
|
returned address type. */
|
|
#define AI_DEFAULT (AI_V4MAPPED | AI_ADDRCONFIG)
|
|
|
|
|
|
/* Description of data base entry for a single network. NOTE: here a
|
|
poor assumption is made. The network number is expected to fit
|
|
into an unsigned long int variable. */
|
|
struct netent
|
|
{
|
|
char *n_name; /* Official name of network. */
|
|
char **n_aliases; /* Alias list. */
|
|
int n_addrtype; /* Net address type. */
|
|
unsigned long int n_net; /* Network number. */
|
|
};
|
|
|
|
/* 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 __P ((int __stay_open));
|
|
|
|
/* Close network data base files and clear `stay open' flag. */
|
|
extern void endnetent __P ((void));
|
|
|
|
/* Get next entry from network data base file. Open data base if
|
|
necessary. */
|
|
extern struct netent *getnetent __P ((void));
|
|
|
|
/* Return entry from network data base which address match NET and
|
|
type TYPE. */
|
|
extern struct netent *getnetbyaddr __P ((unsigned long int __net,
|
|
int __type));
|
|
|
|
/* Return entry from network data base for network with NAME. */
|
|
extern struct netent *getnetbyname __P ((__const char *__name));
|
|
|
|
#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 __P ((struct netent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct netent **__restrict __result,
|
|
int *__restrict __h_errnop));
|
|
|
|
extern int getnetbyaddr_r __P ((unsigned long int __net, int __type,
|
|
struct netent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct netent **__restrict __result,
|
|
int *__restrict __h_errnop));
|
|
|
|
extern int getnetbyname_r __P ((__const char *__restrict __name,
|
|
struct netent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct netent **__restrict __result,
|
|
int *__restrict __h_errnop));
|
|
#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 __P ((int __stay_open));
|
|
|
|
/* Close service data base files and clear `stay open' flag. */
|
|
extern void endservent __P ((void));
|
|
|
|
/* Get next entry from service data base file. Open data base if
|
|
necessary. */
|
|
extern struct servent *getservent __P ((void));
|
|
|
|
/* Return entry from network data base for network with NAME and
|
|
protocol PROTO. */
|
|
extern struct servent *getservbyname __P ((__const char *__name,
|
|
__const char *__proto));
|
|
|
|
/* Return entry from service data base which matches port PORT and
|
|
protocol PROTO. */
|
|
extern struct servent *getservbyport __P ((int __port, __const char *__proto));
|
|
|
|
|
|
#ifdef __USE_MISC
|
|
/* Reentrant versions of the functions above. The additional
|
|
arguments specify a buffer of BUFLEN starting at BUF. */
|
|
extern int getservent_r __P ((struct servent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct servent **__restrict __result));
|
|
|
|
extern int getservbyname_r __P ((__const char *__restrict __name,
|
|
__const char *__restrict __proto,
|
|
struct servent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct servent **__restrict __result));
|
|
|
|
extern int getservbyport_r __P ((int __port, __const char *__restrict __proto,
|
|
struct servent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct servent **__restrict __result));
|
|
#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 __P ((int __stay_open));
|
|
|
|
/* Close protocol data base files and clear `stay open' flag. */
|
|
extern void endprotoent __P ((void));
|
|
|
|
/* Get next entry from protocol data base file. Open data base if
|
|
necessary. */
|
|
extern struct protoent *getprotoent __P ((void));
|
|
|
|
/* Return entry from protocol data base for network with NAME. */
|
|
extern struct protoent *getprotobyname __P ((__const char *__name));
|
|
|
|
/* Return entry from protocol data base which number is PROTO. */
|
|
extern struct protoent *getprotobynumber __P ((int __proto));
|
|
|
|
|
|
#ifdef __USE_MISC
|
|
/* Reentrant versions of the functions above. The additional
|
|
arguments specify a buffer of BUFLEN starting at BUF. */
|
|
extern int getprotoent_r __P ((struct protoent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct protoent **__restrict __result));
|
|
|
|
extern int getprotobyname_r __P ((__const char *__restrict __name,
|
|
struct protoent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct protoent **__restrict __result));
|
|
|
|
extern int getprotobynumber_r __P ((int __proto,
|
|
struct protoent *__restrict __result_buf,
|
|
char *__restrict __buf, size_t __buflen,
|
|
struct protoent **__restrict __result));
|
|
#endif /* misc */
|
|
|
|
|
|
/* Establish network group NETGROUP for enumeration. */
|
|
extern int setnetgrent __P ((__const char *__netgroup));
|
|
|
|
/* Free all space allocated by previous `setnetgrent' call. */
|
|
extern void endnetgrent __P ((void));
|
|
|
|
/* Get next member of netgroup established by last `setnetgrent' call
|
|
and return pointers to elements in HOSTP, USERP, and DOMAINP. */
|
|
extern int getnetgrent __P ((char **__restrict __hostp,
|
|
char **__restrict __userp,
|
|
char **__restrict __domainp));
|
|
|
|
/* Test whether NETGROUP contains the triple (HOST,USER,DOMAIN). */
|
|
extern int innetgr __P ((__const char *__netgroup, __const char *__host,
|
|
__const char *__user, __const char *domain));
|
|
|
|
#ifdef __USE_MISC
|
|
/* Reentrant version of `getnetgrent' where result is placed in BUFFER. */
|
|
extern int getnetgrent_r __P ((char **__restrict __hostp,
|
|
char **__restrict __userp,
|
|
char **__restrict __domainp,
|
|
char *__restrict __buffer, size_t __buflen));
|
|
#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 __P ((char **__restrict __ahost, unsigned short int __rport,
|
|
__const char *__restrict __locuser,
|
|
__const char *__restrict __remuser,
|
|
__const char *__restrict __cmd, int *__restrict __fd2p));
|
|
|
|
/* 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 __P ((char **__restrict __ahost, int __rport,
|
|
__const char *__restrict __name,
|
|
__const char *__restrict __pass,
|
|
__const char *__restrict __cmd,
|
|
int *__restrict __fd2p));
|
|
|
|
/* 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 __P ((__const char *__rhost, int __suser,
|
|
__const char *__remuser, __const char *__locuser));
|
|
|
|
/* 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 __P ((int *__alport));
|
|
#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. */
|
|
int 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. */
|
|
};
|
|
|
|
/* Possible values for `ai_flags' field in `addrinfo' structure. */
|
|
# define AI_PASSIVE 1 /* Socket address is intended for `bind'. */
|
|
# define AI_CANONNAME 2 /* Request for canonical name. */
|
|
# define AI_NUMERICHOST 4 /* 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'. */
|
|
|
|
# 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 __P ((__const char *__restrict __name,
|
|
__const char *__restrict __service,
|
|
__const struct addrinfo *__restrict __req,
|
|
struct addrinfo **__restrict __pai));
|
|
|
|
/* Free `addrinfo' structure AI including associated storage. */
|
|
extern void freeaddrinfo __P ((struct addrinfo *__ai));
|
|
|
|
/* Convert error return from getaddrinfo() to a string. */
|
|
extern char *gai_strerror __P ((int __ecode));
|
|
|
|
/* Translate a socket address to a location and service name. */
|
|
extern int getnameinfo __P ((__const struct sockaddr *__restrict __sa,
|
|
socklen_t __salen,
|
|
char *__restrict __host, size_t __hostlen,
|
|
char *__restrict __serv, size_t __servlen,
|
|
int __flags));
|
|
|
|
#endif /* POSIX */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* netdb.h */
|