Commit | Line | Data |
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370312ae | 1 | /* "net_db.c" network database support |
e4b265d8 | 2 | * Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
370312ae | 3 | * |
73be1d9e MV |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
370312ae | 8 | * |
73be1d9e MV |
9 | * This library is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
370312ae | 13 | * |
73be1d9e MV |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
370312ae | 18 | |
1bbd0b84 GB |
19 | |
20 | ||
370312ae GH |
21 | /* Written in 1994 by Aubrey Jaffer. |
22 | * Thanks to Hallvard.Tretteberg@si.sintef.no for inspiration and discussion. | |
23 | * Rewritten by Gary Houston to be a closer interface to the C socket library. | |
24 | * Split into net_db.c and socket.c. | |
25 | */ | |
26 | \f | |
27 | ||
83b429ed RB |
28 | #if HAVE_CONFIG_H |
29 | # include <config.h> | |
30 | #endif | |
31 | ||
e6e2e95a MD |
32 | #include <errno.h> |
33 | ||
a0599745 MD |
34 | #include "libguile/_scm.h" |
35 | #include "libguile/feature.h" | |
36 | #include "libguile/strings.h" | |
37 | #include "libguile/vectors.h" | |
370312ae | 38 | |
a0599745 MD |
39 | #include "libguile/validate.h" |
40 | #include "libguile/net_db.h" | |
370312ae GH |
41 | |
42 | #ifdef HAVE_STRING_H | |
43 | #include <string.h> | |
44 | #endif | |
45 | ||
46 | #include <sys/types.h> | |
82893676 | 47 | |
f87c105a | 48 | #ifdef HAVE_WINSOCK2_H |
82893676 MG |
49 | #include <winsock2.h> |
50 | #else | |
cae76441 | 51 | #include <sys/socket.h> |
370312ae GH |
52 | #include <netdb.h> |
53 | #include <netinet/in.h> | |
54 | #include <arpa/inet.h> | |
82893676 | 55 | #endif |
370312ae | 56 | |
6063dc1d SJ |
57 | #ifdef __MINGW32__ |
58 | #include "win32-socket.h" | |
59 | #endif | |
60 | ||
e2c80166 | 61 | #if !defined (HAVE_H_ERRNO) && !defined (__MINGW32__) && !defined (__CYGWIN__) |
789ecc05 GH |
62 | /* h_errno not found in netdb.h, maybe this will help. */ |
63 | extern int h_errno; | |
64 | #endif | |
65 | ||
66c73b76 | 66 | \f |
370312ae | 67 | |
5c11cc9d GH |
68 | SCM_SYMBOL (scm_host_not_found_key, "host-not-found"); |
69 | SCM_SYMBOL (scm_try_again_key, "try-again"); | |
70 | SCM_SYMBOL (scm_no_recovery_key, "no-recovery"); | |
71 | SCM_SYMBOL (scm_no_data_key, "no-data"); | |
370312ae | 72 | |
5c11cc9d GH |
73 | static void scm_resolv_error (const char *subr, SCM bad_value) |
74 | { | |
5a5f3646 | 75 | #ifdef NETDB_INTERNAL |
5c11cc9d GH |
76 | if (h_errno == NETDB_INTERNAL) |
77 | { | |
78 | /* errno supposedly contains a useful value. */ | |
79 | scm_syserror (subr); | |
80 | } | |
81 | else | |
5a5f3646 | 82 | #endif |
5c11cc9d GH |
83 | { |
84 | SCM key; | |
85 | const char *errmsg; | |
86 | ||
87 | switch (h_errno) | |
88 | { | |
89 | case HOST_NOT_FOUND: | |
90 | key = scm_host_not_found_key; | |
91 | errmsg = "Unknown host"; | |
92 | break; | |
93 | case TRY_AGAIN: | |
94 | key = scm_try_again_key; | |
95 | errmsg = "Host name lookup failure"; | |
96 | break; | |
97 | case NO_RECOVERY: | |
98 | key = scm_no_recovery_key; | |
99 | errmsg = "Unknown server error"; | |
100 | break; | |
101 | case NO_DATA: | |
102 | key = scm_no_data_key; | |
103 | errmsg = "No address associated with name"; | |
104 | break; | |
105 | default: | |
106 | scm_misc_error (subr, "Unknown resolver error", SCM_EOL); | |
107 | errmsg = NULL; | |
108 | } | |
109 | ||
110 | #ifdef HAVE_HSTRERROR | |
d9b6c170 | 111 | errmsg = (const char *) hstrerror (h_errno); |
5c11cc9d GH |
112 | #endif |
113 | scm_error (key, subr, errmsg, scm_cons (bad_value, SCM_EOL), SCM_EOL); | |
114 | } | |
115 | } | |
116 | ||
117 | /* Should take an extra arg for address format (will be needed for IPv6). | |
118 | Should use reentrant facilities if available. | |
370312ae GH |
119 | */ |
120 | ||
a1ec6916 | 121 | SCM_DEFINE (scm_gethost, "gethost", 0, 1, 0, |
d46e4713 | 122 | (SCM host), |
8f85c0c6 NJ |
123 | "@deffnx {Scheme Procedure} gethostbyname hostname\n" |
124 | "@deffnx {Scheme Procedure} gethostbyaddr address\n" | |
b380b885 MD |
125 | "Look up a host by name or address, returning a host object. The\n" |
126 | "@code{gethost} procedure will accept either a string name or an integer\n" | |
127 | "address; if given no arguments, it behaves like @code{gethostent} (see\n" | |
128 | "below). If a name or address is supplied but the address can not be\n" | |
129 | "found, an error will be thrown to one of the keys:\n" | |
130 | "@code{host-not-found}, @code{try-again}, @code{no-recovery} or\n" | |
131 | "@code{no-data}, corresponding to the equivalent @code{h_error} values.\n" | |
132 | "Unusual conditions may result in errors thrown to the\n" | |
133 | "@code{system-error} or @code{misc_error} keys.") | |
1bbd0b84 | 134 | #define FUNC_NAME s_scm_gethost |
370312ae | 135 | { |
1d1559ce | 136 | SCM result = scm_c_make_vector (5, SCM_UNSPECIFIED); |
370312ae GH |
137 | SCM lst = SCM_EOL; |
138 | struct hostent *entry; | |
139 | struct in_addr inad; | |
140 | char **argv; | |
141 | int i = 0; | |
d46e4713 | 142 | if (SCM_UNBNDP (host)) |
370312ae | 143 | { |
cd34a384 | 144 | #ifdef HAVE_GETHOSTENT |
370312ae | 145 | entry = gethostent (); |
cd34a384 JB |
146 | #else |
147 | entry = NULL; | |
148 | #endif | |
07513939 JB |
149 | if (! entry) |
150 | { | |
151 | /* As far as I can tell, there's no good way to tell whether | |
152 | zero means an error or end-of-file. The trick of | |
153 | clearing errno before calling gethostent and checking it | |
154 | afterwards doesn't cut it, because, on Linux, it seems to | |
155 | try to contact some other server (YP?) and fails, which | |
156 | is a benign failure. */ | |
07513939 JB |
157 | return SCM_BOOL_F; |
158 | } | |
370312ae | 159 | } |
a6d9e5ab | 160 | else if (SCM_STRINGP (host)) |
370312ae | 161 | { |
a6d9e5ab | 162 | entry = gethostbyname (SCM_STRING_CHARS (host)); |
370312ae GH |
163 | } |
164 | else | |
165 | { | |
e4b265d8 | 166 | inad.s_addr = htonl (SCM_NUM2ULONG (1, host)); |
370312ae GH |
167 | entry = gethostbyaddr ((char *) &inad, sizeof (inad), AF_INET); |
168 | } | |
370312ae | 169 | if (!entry) |
d46e4713 | 170 | scm_resolv_error (FUNC_NAME, host); |
5c11cc9d | 171 | |
1d1559ce HWN |
172 | SCM_VECTOR_SET(result, 0, scm_mem2string (entry->h_name, strlen (entry->h_name))); |
173 | SCM_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->h_aliases)); | |
93ccaef0 MV |
174 | SCM_VECTOR_SET(result, 2, SCM_I_MAKINUM (entry->h_addrtype + 0L)); |
175 | SCM_VECTOR_SET(result, 3, SCM_I_MAKINUM (entry->h_length + 0L)); | |
370312ae GH |
176 | if (sizeof (struct in_addr) != entry->h_length) |
177 | { | |
1d1559ce HWN |
178 | SCM_VECTOR_SET(result, 4, SCM_BOOL_F); |
179 | return result; | |
370312ae GH |
180 | } |
181 | for (argv = entry->h_addr_list; argv[i]; i++); | |
182 | while (i--) | |
183 | { | |
184 | inad = *(struct in_addr *) argv[i]; | |
185 | lst = scm_cons (scm_ulong2num (ntohl (inad.s_addr)), lst); | |
186 | } | |
1d1559ce HWN |
187 | SCM_VECTOR_SET(result, 4, lst); |
188 | return result; | |
370312ae | 189 | } |
1bbd0b84 | 190 | #undef FUNC_NAME |
370312ae GH |
191 | |
192 | ||
07513939 JB |
193 | /* In all subsequent getMUMBLE functions, when we're called with no |
194 | arguments, we're supposed to traverse the tables entry by entry. | |
195 | However, there doesn't seem to be any documented way to distinguish | |
196 | between end-of-table and an error; in both cases the functions | |
197 | return zero. Gotta love Unix. For the time being, we clear errno, | |
198 | and if we get a zero and errno is set, we signal an error. This | |
199 | doesn't seem quite right (what if errno gets set as part of healthy | |
200 | operation?), but it seems to work okay. We'll see. */ | |
201 | ||
0e958795 | 202 | #if defined(HAVE_GETNETENT) && defined(HAVE_GETNETBYNAME) && defined(HAVE_GETNETBYADDR) |
a1ec6916 | 203 | SCM_DEFINE (scm_getnet, "getnet", 0, 1, 0, |
d46e4713 | 204 | (SCM net), |
8f85c0c6 NJ |
205 | "@deffnx {Scheme Procedure} getnetbyname net-name\n" |
206 | "@deffnx {Scheme Procedure} getnetbyaddr net-number\n" | |
b380b885 MD |
207 | "Look up a network by name or net number in the network database. The\n" |
208 | "@var{net-name} argument must be a string, and the @var{net-number}\n" | |
209 | "argument must be an integer. @code{getnet} will accept either type of\n" | |
210 | "argument, behaving like @code{getnetent} (see below) if no arguments are\n" | |
211 | "given.") | |
1bbd0b84 | 212 | #define FUNC_NAME s_scm_getnet |
370312ae | 213 | { |
1d1559ce | 214 | SCM result = scm_c_make_vector (4, SCM_UNSPECIFIED); |
370312ae GH |
215 | struct netent *entry; |
216 | ||
d46e4713 | 217 | if (SCM_UNBNDP (net)) |
370312ae | 218 | { |
370312ae | 219 | entry = getnetent (); |
07513939 JB |
220 | if (! entry) |
221 | { | |
1dd05fd8 MG |
222 | /* There's no good way to tell whether zero means an error |
223 | or end-of-file, so we always return #f. See `gethost' | |
224 | for details. */ | |
225 | return SCM_BOOL_F; | |
07513939 | 226 | } |
370312ae | 227 | } |
a6d9e5ab | 228 | else if (SCM_STRINGP (net)) |
370312ae | 229 | { |
a6d9e5ab | 230 | entry = getnetbyname (SCM_STRING_CHARS (net)); |
370312ae GH |
231 | } |
232 | else | |
233 | { | |
234 | unsigned long netnum; | |
d46e4713 | 235 | netnum = SCM_NUM2ULONG (1, net); |
370312ae GH |
236 | entry = getnetbyaddr (netnum, AF_INET); |
237 | } | |
370312ae | 238 | if (!entry) |
1afff620 | 239 | SCM_SYSERROR_MSG ("no such network ~A", scm_list_1 (net), errno); |
1d1559ce HWN |
240 | SCM_VECTOR_SET(result, 0, scm_mem2string (entry->n_name, strlen (entry->n_name))); |
241 | SCM_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->n_aliases)); | |
93ccaef0 | 242 | SCM_VECTOR_SET(result, 2, SCM_I_MAKINUM (entry->n_addrtype + 0L)); |
1d1559ce HWN |
243 | SCM_VECTOR_SET(result, 3, scm_ulong2num (entry->n_net + 0L)); |
244 | return result; | |
370312ae | 245 | } |
1bbd0b84 | 246 | #undef FUNC_NAME |
0e958795 | 247 | #endif |
370312ae | 248 | |
6063dc1d | 249 | #if defined (HAVE_GETPROTOENT) || defined (__MINGW32__) |
a1ec6916 | 250 | SCM_DEFINE (scm_getproto, "getproto", 0, 1, 0, |
d46e4713 | 251 | (SCM protocol), |
8f85c0c6 NJ |
252 | "@deffnx {Scheme Procedure} getprotobyname name\n" |
253 | "@deffnx {Scheme Procedure} getprotobynumber number\n" | |
b380b885 MD |
254 | "Look up a network protocol by name or by number. @code{getprotobyname}\n" |
255 | "takes a string argument, and @code{getprotobynumber} takes an integer\n" | |
256 | "argument. @code{getproto} will accept either type, behaving like\n" | |
257 | "@code{getprotoent} (see below) if no arguments are supplied.") | |
1bbd0b84 | 258 | #define FUNC_NAME s_scm_getproto |
370312ae | 259 | { |
1d1559ce | 260 | SCM result = scm_c_make_vector (3, SCM_UNSPECIFIED); |
370312ae | 261 | |
1d1559ce | 262 | struct protoent *entry; |
d46e4713 | 263 | if (SCM_UNBNDP (protocol)) |
370312ae | 264 | { |
370312ae | 265 | entry = getprotoent (); |
07513939 JB |
266 | if (! entry) |
267 | { | |
1dd05fd8 MG |
268 | /* There's no good way to tell whether zero means an error |
269 | or end-of-file, so we always return #f. See `gethost' | |
270 | for details. */ | |
271 | return SCM_BOOL_F; | |
07513939 | 272 | } |
370312ae | 273 | } |
a6d9e5ab | 274 | else if (SCM_STRINGP (protocol)) |
370312ae | 275 | { |
a6d9e5ab | 276 | entry = getprotobyname (SCM_STRING_CHARS (protocol)); |
370312ae GH |
277 | } |
278 | else | |
279 | { | |
280 | unsigned long protonum; | |
e4b265d8 | 281 | protonum = SCM_NUM2ULONG (1, protocol); |
370312ae GH |
282 | entry = getprotobynumber (protonum); |
283 | } | |
370312ae | 284 | if (!entry) |
1afff620 | 285 | SCM_SYSERROR_MSG ("no such protocol ~A", scm_list_1 (protocol), errno); |
1d1559ce HWN |
286 | SCM_VECTOR_SET(result, 0, scm_mem2string (entry->p_name, strlen (entry->p_name))); |
287 | SCM_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->p_aliases)); | |
93ccaef0 | 288 | SCM_VECTOR_SET(result, 2, SCM_I_MAKINUM (entry->p_proto + 0L)); |
1d1559ce | 289 | return result; |
370312ae | 290 | } |
1bbd0b84 | 291 | #undef FUNC_NAME |
0e958795 | 292 | #endif |
370312ae | 293 | |
6063dc1d | 294 | #if defined (HAVE_GETSERVENT) || defined (__MINGW32__) |
370312ae | 295 | static SCM |
1bbd0b84 | 296 | scm_return_entry (struct servent *entry) |
370312ae | 297 | { |
1d1559ce | 298 | SCM result = scm_c_make_vector (4, SCM_UNSPECIFIED); |
370312ae | 299 | |
1d1559ce HWN |
300 | SCM_VECTOR_SET(result, 0, scm_mem2string (entry->s_name, strlen (entry->s_name))); |
301 | SCM_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->s_aliases)); | |
93ccaef0 | 302 | SCM_VECTOR_SET(result, 2, SCM_I_MAKINUM (ntohs (entry->s_port) + 0L)); |
1d1559ce HWN |
303 | SCM_VECTOR_SET(result, 3, scm_mem2string (entry->s_proto, strlen (entry->s_proto))); |
304 | return result; | |
370312ae GH |
305 | } |
306 | ||
a1ec6916 | 307 | SCM_DEFINE (scm_getserv, "getserv", 0, 2, 0, |
d46e4713 | 308 | (SCM name, SCM protocol), |
8f85c0c6 NJ |
309 | "@deffnx {Scheme Procedure} getservbyname name protocol\n" |
310 | "@deffnx {Scheme Procedure} getservbyport port protocol\n" | |
b380b885 MD |
311 | "Look up a network service by name or by service number, and return a\n" |
312 | "network service object. The @var{protocol} argument specifies the name\n" | |
313 | "of the desired protocol; if the protocol found in the network service\n" | |
314 | "database does not match this name, a system error is signalled.\n\n" | |
315 | "The @code{getserv} procedure will take either a service name or number\n" | |
316 | "as its first argument; if given no arguments, it behaves like\n" | |
317 | "@code{getservent} (see below).") | |
1bbd0b84 | 318 | #define FUNC_NAME s_scm_getserv |
370312ae GH |
319 | { |
320 | struct servent *entry; | |
321 | if (SCM_UNBNDP (name)) | |
322 | { | |
370312ae | 323 | entry = getservent (); |
07513939 JB |
324 | if (!entry) |
325 | { | |
1dd05fd8 MG |
326 | /* There's no good way to tell whether zero means an error |
327 | or end-of-file, so we always return #f. See `gethost' | |
328 | for details. */ | |
329 | return SCM_BOOL_F; | |
07513939 | 330 | } |
370312ae GH |
331 | return scm_return_entry (entry); |
332 | } | |
a6d9e5ab | 333 | SCM_VALIDATE_STRING (2, protocol); |
a6d9e5ab | 334 | if (SCM_STRINGP (name)) |
370312ae | 335 | { |
a55c2b68 MV |
336 | entry = getservbyname (SCM_STRING_CHARS (name), |
337 | SCM_STRING_CHARS (protocol)); | |
370312ae GH |
338 | } |
339 | else | |
340 | { | |
a55c2b68 MV |
341 | entry = getservbyport (htons (scm_to_int (name)), |
342 | SCM_STRING_CHARS (protocol)); | |
370312ae GH |
343 | } |
344 | if (!entry) | |
1afff620 | 345 | SCM_SYSERROR_MSG("no such service ~A", scm_list_1 (name), errno); |
370312ae GH |
346 | return scm_return_entry (entry); |
347 | } | |
1bbd0b84 | 348 | #undef FUNC_NAME |
0e958795 | 349 | #endif |
370312ae | 350 | |
0e958795 | 351 | #if defined(HAVE_SETHOSTENT) && defined(HAVE_ENDHOSTENT) |
a1ec6916 | 352 | SCM_DEFINE (scm_sethost, "sethost", 0, 1, 0, |
d46e4713 | 353 | (SCM stayopen), |
b380b885 MD |
354 | "If @var{stayopen} is omitted, this is equivalent to @code{endhostent}.\n" |
355 | "Otherwise it is equivalent to @code{sethostent stayopen}.") | |
1bbd0b84 | 356 | #define FUNC_NAME s_scm_sethost |
370312ae | 357 | { |
d46e4713 | 358 | if (SCM_UNBNDP (stayopen)) |
370312ae GH |
359 | endhostent (); |
360 | else | |
7888309b | 361 | sethostent (scm_is_true (stayopen)); |
370312ae GH |
362 | return SCM_UNSPECIFIED; |
363 | } | |
1bbd0b84 | 364 | #undef FUNC_NAME |
0e958795 | 365 | #endif |
370312ae | 366 | |
0e958795 | 367 | #if defined(HAVE_SETNETENT) && defined(HAVE_ENDNETENT) |
a1ec6916 | 368 | SCM_DEFINE (scm_setnet, "setnet", 0, 1, 0, |
d46e4713 | 369 | (SCM stayopen), |
b380b885 MD |
370 | "If @var{stayopen} is omitted, this is equivalent to @code{endnetent}.\n" |
371 | "Otherwise it is equivalent to @code{setnetent stayopen}.") | |
1bbd0b84 | 372 | #define FUNC_NAME s_scm_setnet |
370312ae | 373 | { |
d46e4713 | 374 | if (SCM_UNBNDP (stayopen)) |
370312ae GH |
375 | endnetent (); |
376 | else | |
7888309b | 377 | setnetent (scm_is_true (stayopen)); |
370312ae GH |
378 | return SCM_UNSPECIFIED; |
379 | } | |
1bbd0b84 | 380 | #undef FUNC_NAME |
0e958795 | 381 | #endif |
370312ae | 382 | |
6063dc1d | 383 | #if defined (HAVE_SETPROTOENT) && defined (HAVE_ENDPROTOENT) || defined (__MINGW32__) |
a1ec6916 | 384 | SCM_DEFINE (scm_setproto, "setproto", 0, 1, 0, |
d46e4713 | 385 | (SCM stayopen), |
b380b885 MD |
386 | "If @var{stayopen} is omitted, this is equivalent to @code{endprotoent}.\n" |
387 | "Otherwise it is equivalent to @code{setprotoent stayopen}.") | |
1bbd0b84 | 388 | #define FUNC_NAME s_scm_setproto |
370312ae | 389 | { |
d46e4713 | 390 | if (SCM_UNBNDP (stayopen)) |
370312ae GH |
391 | endprotoent (); |
392 | else | |
7888309b | 393 | setprotoent (scm_is_true (stayopen)); |
370312ae GH |
394 | return SCM_UNSPECIFIED; |
395 | } | |
1bbd0b84 | 396 | #undef FUNC_NAME |
0e958795 | 397 | #endif |
370312ae | 398 | |
6063dc1d | 399 | #if defined (HAVE_SETSERVENT) && defined (HAVE_ENDSERVENT) || defined (__MINGW32__) |
a1ec6916 | 400 | SCM_DEFINE (scm_setserv, "setserv", 0, 1, 0, |
d46e4713 | 401 | (SCM stayopen), |
b380b885 MD |
402 | "If @var{stayopen} is omitted, this is equivalent to @code{endservent}.\n" |
403 | "Otherwise it is equivalent to @code{setservent stayopen}.") | |
1bbd0b84 | 404 | #define FUNC_NAME s_scm_setserv |
370312ae | 405 | { |
d46e4713 | 406 | if (SCM_UNBNDP (stayopen)) |
370312ae GH |
407 | endservent (); |
408 | else | |
7888309b | 409 | setservent (scm_is_true (stayopen)); |
370312ae GH |
410 | return SCM_UNSPECIFIED; |
411 | } | |
1bbd0b84 | 412 | #undef FUNC_NAME |
0e958795 | 413 | #endif |
370312ae GH |
414 | |
415 | ||
416 | void | |
417 | scm_init_net_db () | |
418 | { | |
370312ae | 419 | scm_add_feature ("net-db"); |
a0599745 | 420 | #include "libguile/net_db.x" |
370312ae | 421 | } |
89e00824 ML |
422 | |
423 | /* | |
424 | Local Variables: | |
425 | c-file-style: "gnu" | |
426 | End: | |
427 | */ |