1 /* "net_db.c" network database support
2 * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2006, 2009,
3 * 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public License
7 * as published by the Free Software Foundation; either version 3 of
8 * the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 /* Written in 1994 by Aubrey Jaffer.
24 * Thanks to Hallvard.Tretteberg@si.sintef.no for inspiration and discussion.
25 * Rewritten by Gary Houston to be a closer interface to the C socket library.
26 * Split into net_db.c and socket.c.
37 #include "libguile/_scm.h"
38 #include "libguile/feature.h"
39 #include "libguile/strings.h"
40 #include "libguile/vectors.h"
41 #include "libguile/dynwind.h"
43 #include "libguile/validate.h"
44 #include "libguile/net_db.h"
45 #include "libguile/socket.h"
51 #include <sys/types.h>
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
59 #include "win32-socket.h"
62 #if !defined (HAVE_H_ERRNO) && !defined (__MINGW32__) && !defined (__CYGWIN__)
63 /* h_errno not found in netdb.h, maybe this will help. */
67 #if defined HAVE_HSTRERROR && !HAVE_DECL_HSTRERROR \
68 && !defined __MINGW32__ && !defined __CYGWIN__
69 /* Some OSes, such as Tru64 5.1b, lack a declaration for hstrerror(3). */
70 extern const char *hstrerror (int);
75 SCM_SYMBOL (scm_host_not_found_key
, "host-not-found");
76 SCM_SYMBOL (scm_try_again_key
, "try-again");
77 SCM_SYMBOL (scm_no_recovery_key
, "no-recovery");
78 SCM_SYMBOL (scm_no_data_key
, "no-data");
80 static void scm_resolv_error (const char *subr
, SCM bad_value
)
83 if (h_errno
== NETDB_INTERNAL
)
85 /* errno supposedly contains a useful value. */
97 key
= scm_host_not_found_key
;
98 errmsg
= "Unknown host";
101 key
= scm_try_again_key
;
102 errmsg
= "Host name lookup failure";
105 key
= scm_no_recovery_key
;
106 errmsg
= "Unknown server error";
109 key
= scm_no_data_key
;
110 errmsg
= "No address associated with name";
113 scm_misc_error (subr
, "Unknown resolver error", SCM_EOL
);
117 #ifdef HAVE_HSTRERROR
118 errmsg
= (const char *) hstrerror (h_errno
);
120 scm_error (key
, subr
, errmsg
, SCM_BOOL_F
, SCM_EOL
);
124 /* Should take an extra arg for address format (will be needed for IPv6).
125 Should use reentrant facilities if available.
128 SCM_DEFINE (scm_gethost
, "gethost", 0, 1, 0,
130 "@deffnx {Scheme Procedure} gethostbyname hostname\n"
131 "@deffnx {Scheme Procedure} gethostbyaddr address\n"
132 "Look up a host by name or address, returning a host object. The\n"
133 "@code{gethost} procedure will accept either a string name or an integer\n"
134 "address; if given no arguments, it behaves like @code{gethostent} (see\n"
135 "below). If a name or address is supplied but the address can not be\n"
136 "found, an error will be thrown to one of the keys:\n"
137 "@code{host-not-found}, @code{try-again}, @code{no-recovery} or\n"
138 "@code{no-data}, corresponding to the equivalent @code{h_error} values.\n"
139 "Unusual conditions may result in errors thrown to the\n"
140 "@code{system-error} or @code{misc_error} keys.")
141 #define FUNC_NAME s_scm_gethost
143 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
145 struct hostent
*entry
;
150 if (SCM_UNBNDP (host
))
152 #ifdef HAVE_GETHOSTENT
153 entry
= gethostent ();
159 /* As far as I can tell, there's no good way to tell whether
160 zero means an error or end-of-file. The trick of
161 clearing errno before calling gethostent and checking it
162 afterwards doesn't cut it, because, on Linux, it seems to
163 try to contact some other server (YP?) and fails, which
164 is a benign failure. */
168 else if (scm_is_string (host
))
170 char *str
= scm_to_locale_string (host
);
171 entry
= gethostbyname (str
);
176 inad
.s_addr
= htonl (scm_to_ulong (host
));
177 entry
= gethostbyaddr ((char *) &inad
, sizeof (inad
), AF_INET
);
181 scm_resolv_error (FUNC_NAME
, host
);
183 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->h_name
));
184 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_makfromstrs (-1, entry
->h_aliases
));
185 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_int (entry
->h_addrtype
));
186 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_int (entry
->h_length
));
187 if (sizeof (struct in_addr
) != entry
->h_length
)
189 SCM_SIMPLE_VECTOR_SET(result
, 4, SCM_BOOL_F
);
192 for (argv
= entry
->h_addr_list
; argv
[i
]; i
++);
195 inad
= *(struct in_addr
*) argv
[i
];
196 lst
= scm_cons (scm_from_ulong (ntohl (inad
.s_addr
)), lst
);
198 SCM_SIMPLE_VECTOR_SET(result
, 4, lst
);
204 /* In all subsequent getMUMBLE functions, when we're called with no
205 arguments, we're supposed to traverse the tables entry by entry.
206 However, there doesn't seem to be any documented way to distinguish
207 between end-of-table and an error; in both cases the functions
208 return zero. Gotta love Unix. For the time being, we clear errno,
209 and if we get a zero and errno is set, we signal an error. This
210 doesn't seem quite right (what if errno gets set as part of healthy
211 operation?), but it seems to work okay. We'll see. */
213 #if defined(HAVE_GETNETENT) && defined(HAVE_GETNETBYNAME) && defined(HAVE_GETNETBYADDR)
214 SCM_DEFINE (scm_getnet
, "getnet", 0, 1, 0,
216 "@deffnx {Scheme Procedure} getnetbyname net-name\n"
217 "@deffnx {Scheme Procedure} getnetbyaddr net-number\n"
218 "Look up a network by name or net number in the network database. The\n"
219 "@var{net-name} argument must be a string, and the @var{net-number}\n"
220 "argument must be an integer. @code{getnet} will accept either type of\n"
221 "argument, behaving like @code{getnetent} (see below) if no arguments are\n"
223 #define FUNC_NAME s_scm_getnet
225 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
226 struct netent
*entry
;
229 if (SCM_UNBNDP (net
))
231 entry
= getnetent ();
234 /* There's no good way to tell whether zero means an error
235 or end-of-file, so we always return #f. See `gethost'
240 else if (scm_is_string (net
))
242 char *str
= scm_to_locale_string (net
);
243 entry
= getnetbyname (str
);
249 unsigned long netnum
= scm_to_ulong (net
);
250 entry
= getnetbyaddr (netnum
, AF_INET
);
255 SCM_SYSERROR_MSG ("no such network ~A", scm_list_1 (net
), eno
);
257 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->n_name
));
258 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_makfromstrs (-1, entry
->n_aliases
));
259 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_int (entry
->n_addrtype
));
260 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->n_net
));
266 #if defined (HAVE_GETPROTOENT) || defined (__MINGW32__)
267 SCM_DEFINE (scm_getproto
, "getproto", 0, 1, 0,
269 "@deffnx {Scheme Procedure} getprotobyname name\n"
270 "@deffnx {Scheme Procedure} getprotobynumber number\n"
271 "Look up a network protocol by name or by number. @code{getprotobyname}\n"
272 "takes a string argument, and @code{getprotobynumber} takes an integer\n"
273 "argument. @code{getproto} will accept either type, behaving like\n"
274 "@code{getprotoent} (see below) if no arguments are supplied.")
275 #define FUNC_NAME s_scm_getproto
277 SCM result
= scm_c_make_vector (3, SCM_UNSPECIFIED
);
278 struct protoent
*entry
;
281 if (SCM_UNBNDP (protocol
))
283 entry
= getprotoent ();
286 /* There's no good way to tell whether zero means an error
287 or end-of-file, so we always return #f. See `gethost'
292 else if (scm_is_string (protocol
))
294 char *str
= scm_to_locale_string (protocol
);
295 entry
= getprotobyname (str
);
301 unsigned long protonum
= scm_to_ulong (protocol
);
302 entry
= getprotobynumber (protonum
);
307 SCM_SYSERROR_MSG ("no such protocol ~A", scm_list_1 (protocol
), eno
);
309 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->p_name
));
310 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_makfromstrs (-1, entry
->p_aliases
));
311 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_int (entry
->p_proto
));
317 #if defined (HAVE_GETSERVENT) || defined (__MINGW32__)
319 scm_return_entry (struct servent
*entry
)
321 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
323 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->s_name
));
324 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_makfromstrs (-1, entry
->s_aliases
));
325 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_uint16 (ntohs (entry
->s_port
)));
326 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (entry
->s_proto
));
330 SCM_DEFINE (scm_getserv
, "getserv", 0, 2, 0,
331 (SCM name
, SCM protocol
),
332 "@deffnx {Scheme Procedure} getservbyname name protocol\n"
333 "@deffnx {Scheme Procedure} getservbyport port protocol\n"
334 "Look up a network service by name or by service number, and return a\n"
335 "network service object. The @var{protocol} argument specifies the name\n"
336 "of the desired protocol; if the protocol found in the network service\n"
337 "database does not match this name, a system error is signalled.\n\n"
338 "The @code{getserv} procedure will take either a service name or number\n"
339 "as its first argument; if given no arguments, it behaves like\n"
340 "@code{getservent} (see below).")
341 #define FUNC_NAME s_scm_getserv
343 struct servent
*entry
;
347 if (SCM_UNBNDP (name
))
349 entry
= getservent ();
352 /* There's no good way to tell whether zero means an error
353 or end-of-file, so we always return #f. See `gethost'
357 return scm_return_entry (entry
);
360 scm_dynwind_begin (0);
362 protoname
= scm_to_locale_string (protocol
);
363 scm_dynwind_free (protoname
);
365 if (scm_is_string (name
))
367 char *str
= scm_to_locale_string (name
);
368 entry
= getservbyname (str
, protoname
);
374 entry
= getservbyport (htons (scm_to_int (name
)), protoname
);
379 SCM_SYSERROR_MSG("no such service ~A", scm_list_1 (name
), eno
);
382 return scm_return_entry (entry
);
387 #if defined(HAVE_SETHOSTENT) && defined(HAVE_ENDHOSTENT)
388 SCM_DEFINE (scm_sethost
, "sethost", 0, 1, 0,
390 "If @var{stayopen} is omitted, this is equivalent to @code{endhostent}.\n"
391 "Otherwise it is equivalent to @code{sethostent stayopen}.")
392 #define FUNC_NAME s_scm_sethost
394 if (SCM_UNBNDP (stayopen
))
397 sethostent (scm_is_true (stayopen
));
398 return SCM_UNSPECIFIED
;
403 #if defined(HAVE_SETNETENT) && defined(HAVE_ENDNETENT)
404 SCM_DEFINE (scm_setnet
, "setnet", 0, 1, 0,
406 "If @var{stayopen} is omitted, this is equivalent to @code{endnetent}.\n"
407 "Otherwise it is equivalent to @code{setnetent stayopen}.")
408 #define FUNC_NAME s_scm_setnet
410 if (SCM_UNBNDP (stayopen
))
413 setnetent (scm_is_true (stayopen
));
414 return SCM_UNSPECIFIED
;
419 #if defined (HAVE_SETPROTOENT) && defined (HAVE_ENDPROTOENT) || defined (__MINGW32__)
420 SCM_DEFINE (scm_setproto
, "setproto", 0, 1, 0,
422 "If @var{stayopen} is omitted, this is equivalent to @code{endprotoent}.\n"
423 "Otherwise it is equivalent to @code{setprotoent stayopen}.")
424 #define FUNC_NAME s_scm_setproto
426 if (SCM_UNBNDP (stayopen
))
429 setprotoent (scm_is_true (stayopen
));
430 return SCM_UNSPECIFIED
;
435 #if defined (HAVE_SETSERVENT) && defined (HAVE_ENDSERVENT) || defined (__MINGW32__)
436 SCM_DEFINE (scm_setserv
, "setserv", 0, 1, 0,
438 "If @var{stayopen} is omitted, this is equivalent to @code{endservent}.\n"
439 "Otherwise it is equivalent to @code{setservent stayopen}.")
440 #define FUNC_NAME s_scm_setserv
442 if (SCM_UNBNDP (stayopen
))
445 setservent (scm_is_true (stayopen
));
446 return SCM_UNSPECIFIED
;
452 /* Protocol-independent name resolution with getaddrinfo(3) & co. */
454 SCM_SYMBOL (sym_getaddrinfo_error
, "getaddrinfo-error");
456 /* Make sure the `AI_*' flags can be stored as INUMs. */
457 verify (AI_ALL
< SCM_MOST_POSITIVE_FIXNUM
);
459 /* Valid values for the `ai_flags' to `struct addrinfo'. */
460 SCM_VARIABLE_INIT (sym_ai_passive
, "AI_PASSIVE",
461 SCM_I_MAKINUM (AI_PASSIVE
));
462 SCM_VARIABLE_INIT (sym_ai_canonname
, "AI_CANONNAME",
463 SCM_I_MAKINUM (AI_CANONNAME
));
464 SCM_VARIABLE_INIT (sym_ai_numerichost
, "AI_NUMERICHOST",
465 SCM_I_MAKINUM (AI_NUMERICHOST
));
466 SCM_VARIABLE_INIT (sym_ai_numericserv
, "AI_NUMERICSERV",
467 SCM_I_MAKINUM (AI_NUMERICSERV
));
468 SCM_VARIABLE_INIT (sym_ai_v4mapped
, "AI_V4MAPPED",
469 SCM_I_MAKINUM (AI_V4MAPPED
));
470 SCM_VARIABLE_INIT (sym_ai_all
, "AI_ALL",
471 SCM_I_MAKINUM (AI_ALL
));
472 SCM_VARIABLE_INIT (sym_ai_addrconfig
, "AI_ADDRCONFIG",
473 SCM_I_MAKINUM (AI_ADDRCONFIG
));
475 /* Return a Scheme vector whose elements correspond to the fields of C_AI,
476 ignoring the `ai_next' field. This function is not exported because the
477 definition of `struct addrinfo' is provided by Gnulib. */
479 scm_from_addrinfo (const struct addrinfo
*c_ai
)
483 /* Note: The indices here must be kept synchronized with those used by the
484 `addrinfo:' procedures in `networking.scm'. */
486 ai
= scm_c_make_vector (6, SCM_UNDEFINED
);
487 SCM_SIMPLE_VECTOR_SET (ai
, 0, scm_from_int (c_ai
->ai_flags
));
488 SCM_SIMPLE_VECTOR_SET (ai
, 1, scm_from_int (c_ai
->ai_family
));
489 SCM_SIMPLE_VECTOR_SET (ai
, 2, scm_from_int (c_ai
->ai_socktype
));
490 SCM_SIMPLE_VECTOR_SET (ai
, 3, scm_from_int (c_ai
->ai_protocol
));
491 SCM_SIMPLE_VECTOR_SET (ai
, 4,
492 scm_from_sockaddr (c_ai
->ai_addr
, c_ai
->ai_addrlen
));
493 SCM_SIMPLE_VECTOR_SET (ai
, 5,
494 c_ai
->ai_canonname
!= NULL
495 ? scm_from_locale_string (c_ai
->ai_canonname
)
501 SCM_DEFINE (scm_getaddrinfo
, "getaddrinfo", 1, 5, 0,
502 (SCM name
, SCM service
, SCM hint_flags
, SCM hint_family
,
503 SCM hint_socktype
, SCM hint_protocol
),
504 "Return a list of @code{addrinfo} structures containing "
505 "a socket address and associated information for host @var{name} "
506 "and/or @var{service} to be used in creating a socket with "
507 "which to address the specified service.\n\n"
509 "(let* ((ai (car (getaddrinfo \"www.gnu.org\" \"http\")))\n"
510 " (s (socket (addrinfo:fam ai) (addrinfo:socktype ai)\n"
511 " (addrinfo:protocol ai))))\n"
512 " (connect s (addrinfo:addr ai))\n"
515 "When @var{service} is omitted or is @code{#f}, return "
516 "network-level addresses for @var{name}. When @var{name} "
517 "is @code{#f} @var{service} must be provided and service "
518 "locations local to the caller are returned.\n"
520 "Additional hints can be provided. When specified, "
521 "@var{hint_flags} should be a bitwise-or of zero or more "
522 "constants among the following:\n\n"
525 "Socket address is intended for @code{bind}.\n\n"
526 "@item AI_CANONNAME\n"
527 "Request for canonical host name, available via "
528 "@code{addrinfo:canonname}. This makes sense mainly when "
529 "DNS lookups are involved.\n\n"
530 "@item AI_NUMERICHOST\n"
531 "Specifies that @var{name} is a numeric host address string "
532 "(e.g., @code{\"127.0.0.1\"}), meaning that name resolution "
533 "will not be used.\n\n"
534 "@item AI_NUMERICSERV\n"
535 "Likewise, specifies that @var{service} is a numeric port "
536 "string (e.g., @code{\"80\"}).\n\n"
537 "@item AI_ADDRCONFIG\n"
538 "Return only addresses configured on the local system. It is "
539 "highly recommended to provide this flag when the returned "
540 "socket addresses are to be used to make connections; "
541 "otherwise, some of the returned addresses could be unreachable "
542 "or use a protocol that is not supported.\n\n"
543 "@item AI_V4MAPPED\n"
544 "When looking up IPv6 addresses, return mapped "
545 "IPv4 addresses if there is no IPv6 address available at all.\n\n"
547 "If this flag is set along with @code{AI_V4MAPPED} when looking "
548 "up IPv6 addresses, return all IPv6 addresses "
549 "as well as all IPv4 addresses, the latter mapped to IPv6 "
552 "When given, @var{hint_family} should specify the requested "
553 "address family, e.g., @code{AF_INET6}. Similarly, "
554 "@var{hint_socktype} should specify the requested socket type "
555 "(e.g., @code{SOCK_DGRAM}), and @var{hint_protocol} should "
556 "specify the requested protocol (its value is interpretered "
557 "as in calls to @code{socket}).\n"
559 "On error, an exception with key @code{getaddrinfo-error} is "
560 "thrown, with an error code (an integer) as its argument:\n\n"
562 "(catch 'getaddrinfo-error\n"
564 " (getaddrinfo \"www.gnu.org\" \"gopher\"))\n"
565 " (lambda (key errcode)\n"
566 " (cond ((= errcode EAI_SERVICE)\n"
567 " (display \"doesn't know about Gopher!\\n\"))\n"
568 " ((= errcode EAI_NONAME)\n"
569 " (display \"www.gnu.org not found\\n\"))\n"
571 " (format #t \"something wrong: ~a\\n\"\n"
572 " (gai-strerror errcode))))))\n"
575 "Error codes are:\n\n"
578 "The name or service could not be resolved at this time. Future "
579 "attempts may succeed.\n\n"
580 "@item EAI_BADFLAGS\n"
581 "@var{hint_flags} contains an invalid value.\n\n"
583 "A non-recoverable error occurred when attempting to "
584 "resolve the name.\n\n"
586 "@var{hint_family} was not recognized.\n\n"
588 "Either @var{name} does not resolve for the supplied parameters, "
589 "or neither @var{name} nor @var{service} were supplied.\n\n"
591 /* See `sysdeps/posix/getaddrinfo.c' in the GNU libc, and
592 <http://www.opensource.apple.com/source/Libinfo/Libinfo-324.1/lookup.subproj/netdb.h>,
593 for details on EAI_NODATA. */
595 "This non-POSIX error code can be returned on some systems (GNU "
596 "and Darwin, at least), for example when @var{name} is known "
597 "but requests that were made turned out no data. Error handling\n"
598 "code should be prepared to handle it when it is defined.\n\n"
599 "@item EAI_SERVICE\n"
600 "@var{service} was not recognized for the specified socket type.\n\n"
601 "@item EAI_SOCKTYPE\n"
602 "@var{hint_socktype} was not recognized.\n\n"
604 "A system error occurred; the error code can be found in "
608 "Users are encouraged to read the "
609 "@url{http://www.opengroup.org/onlinepubs/9699919799/functions/getaddrinfo.html,"
610 "POSIX specification} for more details.\n")
611 #define FUNC_NAME s_scm_getaddrinfo
614 char *c_name
, *c_service
;
615 struct addrinfo c_hints
, *c_result
;
616 SCM result
= SCM_EOL
;
618 if (scm_is_true (name
))
619 SCM_VALIDATE_STRING (SCM_ARG1
, name
);
621 if (!SCM_UNBNDP (service
) && scm_is_true (service
))
622 SCM_VALIDATE_STRING (SCM_ARG2
, service
);
624 scm_dynwind_begin (0);
626 if (scm_is_string (name
))
628 c_name
= scm_to_locale_string (name
);
629 scm_dynwind_free (c_name
);
634 if (scm_is_string (service
))
636 c_service
= scm_to_locale_string (service
);
637 scm_dynwind_free (c_service
);
642 memset (&c_hints
, 0, sizeof (c_hints
));
643 if (!SCM_UNBNDP (hint_flags
))
645 c_hints
.ai_flags
= scm_to_int (hint_flags
);
646 if (!SCM_UNBNDP (hint_family
))
648 c_hints
.ai_family
= scm_to_int (hint_family
);
649 if (!SCM_UNBNDP (hint_socktype
))
651 c_hints
.ai_socktype
= scm_to_int (hint_socktype
);
652 if (!SCM_UNBNDP (hint_family
))
653 c_hints
.ai_family
= scm_to_int (hint_family
);
658 err
= getaddrinfo (c_name
, c_service
, &c_hints
, &c_result
);
664 for (prev_addr
= &result
, a
= c_result
;
666 a
= a
->ai_next
, prev_addr
= SCM_CDRLOC (*prev_addr
))
667 *prev_addr
= scm_list_1 (scm_from_addrinfo (a
));
669 freeaddrinfo (c_result
);
672 scm_throw (sym_getaddrinfo_error
, scm_list_1 (scm_from_int (err
)));
680 /* Make sure the `EAI_*' flags can be stored as INUMs. */
681 verify (EAI_BADFLAGS
< SCM_MOST_POSITIVE_FIXNUM
);
683 /* Error codes returned by `getaddrinfo'. */
684 SCM_VARIABLE_INIT (sym_eai_badflags
, "EAI_BADFLAGS",
685 SCM_I_MAKINUM (EAI_BADFLAGS
));
686 SCM_VARIABLE_INIT (sym_eai_noname
, "EAI_NONAME",
687 SCM_I_MAKINUM (EAI_NONAME
));
688 SCM_VARIABLE_INIT (sym_eai_again
, "EAI_AGAIN",
689 SCM_I_MAKINUM (EAI_AGAIN
));
690 SCM_VARIABLE_INIT (sym_eai_fail
, "EAI_FAIL",
691 SCM_I_MAKINUM (EAI_FAIL
));
692 SCM_VARIABLE_INIT (sym_eai_family
, "EAI_FAMILY",
693 SCM_I_MAKINUM (EAI_FAMILY
));
694 SCM_VARIABLE_INIT (sym_eai_socktype
, "EAI_SOCKTYPE",
695 SCM_I_MAKINUM (EAI_SOCKTYPE
));
696 SCM_VARIABLE_INIT (sym_eai_service
, "EAI_SERVICE",
697 SCM_I_MAKINUM (EAI_SERVICE
));
698 SCM_VARIABLE_INIT (sym_eai_memory
, "EAI_MEMORY",
699 SCM_I_MAKINUM (EAI_MEMORY
));
700 SCM_VARIABLE_INIT (sym_eai_system
, "EAI_SYSTEM",
701 SCM_I_MAKINUM (EAI_SYSTEM
));
702 SCM_VARIABLE_INIT (sym_eai_overflow
, "EAI_OVERFLOW",
703 SCM_I_MAKINUM (EAI_OVERFLOW
));
705 /* The following values are GNU extensions. */
707 SCM_VARIABLE_INIT (sym_eai_nodata
, "EAI_NODATA",
708 SCM_I_MAKINUM (EAI_NODATA
));
710 #ifdef EAI_ADDRFAMILY
711 SCM_VARIABLE_INIT (sym_eai_addrfamily
, "EAI_ADDRFAMILY",
712 SCM_I_MAKINUM (EAI_ADDRFAMILY
));
714 #ifdef EAI_INPROGRESS
715 SCM_VARIABLE_INIT (sym_eai_inprogress
, "EAI_INPROGRESS",
716 SCM_I_MAKINUM (EAI_INPROGRESS
));
719 SCM_VARIABLE_INIT (sym_eai_canceled
, "EAI_CANCELED",
720 SCM_I_MAKINUM (EAI_CANCELED
));
722 #ifdef EAI_NOTCANCELED
723 SCM_VARIABLE_INIT (sym_eai_notcanceled
, "EAI_NOTCANCELED",
724 SCM_I_MAKINUM (EAI_NOTCANCELED
));
727 SCM_VARIABLE_INIT (sym_eai_alldone
, "EAI_ALLDONE",
728 SCM_I_MAKINUM (EAI_ALLDONE
));
731 SCM_VARIABLE_INIT (sym_eai_intr
, "EAI_INTR",
732 SCM_I_MAKINUM (EAI_INTR
));
734 #ifdef EAI_IDN_ENCODE
735 SCM_VARIABLE_INIT (sym_eai_idn_encode
, "EAI_IDN_ENCODE",
736 SCM_I_MAKINUM (EAI_IDN_ENCODE
));
739 SCM_DEFINE (scm_gai_strerror
, "gai-strerror", 1, 0, 0,
741 "Return a string describing @var{error}, an integer error code "
742 "returned by @code{getaddrinfo}.")
743 #define FUNC_NAME s_scm_gai_strerror
745 return scm_from_locale_string (gai_strerror (scm_to_int (error
)));
749 /* TODO: Add a getnameinfo(3) wrapper. */
755 scm_add_feature ("net-db");
756 #include "libguile/net_db.x"