summary refs log tree commit diff
path: root/resolv/netdb.h
blob: b60f923229ec22299ab0d6e8bf1ed8cbd15a0af9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
/* Copyright (C) 1996, 1997 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>
#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
/* Retain some binary compatibility with old libraries by having both the
   global variable and the per-thread variable set on error.  */
# ifdef _LIBC_REENTRANT
static inline int
__set_h_errno (int __err)
{
  return *__h_errno_location () = h_errno = __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, int __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 as `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 *__result_buf, char *__buf,
				size_t __buflen, struct hostent **__result,
				int *__h_errnop));
extern int gethostent_r __P ((struct hostent *__result_buf, char *__buf,
			      size_t __buflen, struct hostent **__result,
			      int *__h_errnop));

extern int __gethostbyaddr_r __P ((__const char *__addr, int __len, int __type,
				   struct hostent *__result_buf, char *__buf,
				   size_t __buflen, struct hostent **__result,
				   int *__h_errnop));
extern int gethostbyaddr_r __P ((__const char *__addr, int __len, int __type,
				 struct hostent *__result_buf, char *__buf,
				 size_t __buflen, struct hostent **__result,
				 int *__h_errnop));

extern int __gethostbyname_r __P ((__const char *__name,
				   struct hostent *__result_buf, char *__buf,
				   size_t __buflen, struct hostent **__result,
				   int *__h_errnop));
extern int gethostbyname_r __P ((__const char *__name,
				 struct hostent *__result_buf, char *__buf,
				 size_t __buflen, struct hostent **__result,
				 int *__h_errnop));

extern int __gethostbyname2_r __P ((__const char *__name, int __af,
				    struct hostent *__result_buf, char *__buf,
				    size_t __buflen, struct hostent **__result,
				    int *__h_errnop));
extern int gethostbyname2_r __P ((__const char *__name, int __af,
				  struct hostent *__result_buf, char *__buf,
				  size_t __buflen, struct hostent **__result,
				  int *__h_errnop));
#endif	/* misc */


/* 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 *__result_buf, char *__buf,
			       size_t __buflen, struct netent **__result,
			       int *__h_errnop));
extern int getnetent_r __P ((struct netent *__result_buf, char *__buf,
			     size_t __buflen, struct netent **__result,
			     int *__h_errnop));

extern int __getnetbyaddr_r __P ((unsigned long int __net, int __type,
				  struct netent *__result_buf, char *__buf,
				  size_t __buflen, struct netent **__result,
				  int *__h_errnop));
extern int getnetbyaddr_r __P ((unsigned long int __net, int __type,
				struct netent *__result_buf, char *__buf,
				size_t __buflen, struct netent **__result,
				int *__h_errnop));

extern int __getnetbyname_r __P ((__const char *__name,
				  struct netent *__result_buf, char *__buf,
				  size_t __buflen, struct netent **__result,
				  int *__h_errnop));
extern int getnetbyname_r __P ((__const char *__name,
				struct netent *__result_buf, char *__buf,
				size_t __buflen, struct netent **__result,
				int *__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 *__result_buf, char *__buf,
				size_t __buflen, struct servent **__result));
extern int getservent_r __P ((struct servent *__result_buf, char *__buf,
			      size_t __buflen, struct servent **__result));

extern int __getservbyname_r __P ((__const char *__name, __const char *__proto,
				   struct servent *__result_buf, char *__buf,
				   size_t __buflen,
				   struct servent **__result));
extern int getservbyname_r __P ((__const char *__name, __const char *__proto,
				 struct servent *__result_buf, char *__buf,
				 size_t __buflen, struct servent **__result));

extern int __getservbyport_r __P ((int __port, __const char *__proto,
				   struct servent *__result_buf, char *__buf,
				   size_t __buflen,
				   struct servent **__result));
extern int getservbyport_r __P ((int __port, __const char *__proto,
				 struct servent *__result_buf, char *__buf,
				 size_t __buflen, struct servent **__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 *__result_buf, char *__buf,
				 size_t __buflen, struct protoent **__result));
extern int getprotoent_r __P ((struct protoent *__result_buf, char *__buf,
			       size_t __buflen, struct protoent **__result));

extern int __getprotobyname_r __P ((__const char *__name,
				    struct protoent *__result_buf, char *__buf,
				    size_t __buflen,
				    struct protoent **__result));
extern int getprotobyname_r __P ((__const char *__name,
				  struct protoent *__result_buf, char *__buf,
				  size_t __buflen,
				  struct protoent **__result));

extern int __getprotobynumber_r __P ((int __proto, struct protoent *__res_buf,
				      char *__buf, size_t __buflen,
				      struct protoent **__result));
extern int getprotobynumber_r __P ((int __proto, struct protoent *__result_buf,
				    char *__buf, size_t __buflen,
				    struct protoent **__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 **__hostp, char **__userp,
			     char **__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 **__hostp, char **__userp,
				 char **__domainp,
				 char *__buffer, size_t __buflen));
extern int getnetgrent_r __P ((char **__hostp, char **__userp,
			       char **__domainp,
			       char *__buffer, size_t __buflen));
#endif	/* misc */


/* 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.  */

/* 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'.  */


/* Translate name of a service location and/or a service name to set of
   socket addresses.  */
extern int getaddrinfo __P ((__const char *__name, __const char *__service,
			     __const struct addrinfo *__req,
			     struct addrinfo **__pai));

/* Free `addrinfo' structure AI including associated storage.  */
extern void freeaddrinfo __P ((struct addrinfo *__ai));
#endif	/* POSIX */

__END_DECLS

#endif	/* netdb.h */