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
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
|
/* "net_db.c" network database support
* Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
/* Written in 1994 by Aubrey Jaffer.
* Thanks to Hallvard.Tretteberg@si.sintef.no for inspiration and discussion.
* Rewritten by Gary Houston to be a closer interface to the C socket library.
* Split into net_db.c and socket.c.
*/
#include <stdio.h>
#include "_scm.h"
#include "feature.h"
#include "net_db.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/* Some systems do not declare this. Some systems do declare it, as a
macro. */
#ifndef h_errno
extern int h_errno;
#endif
#ifndef STDC_HEADERS
int close ();
#endif /* STDC_HEADERS */
extern int inet_aton ();
SCM_PROC (s_inet_aton, "inet-aton", 1, 0, 0, scm_inet_aton);
SCM
scm_inet_aton (address)
SCM address;
{
struct in_addr soka;
SCM_ASSERT (SCM_NIMP (address) && SCM_ROSTRINGP (address), address, SCM_ARG1, s_inet_aton);
if (SCM_SUBSTRP (address))
address = scm_makfromstr (SCM_ROCHARS (address), SCM_ROLENGTH (address), 0);
if (inet_aton (SCM_ROCHARS (address), &soka) == 0)
scm_syserror (s_inet_aton);
return scm_ulong2num (ntohl (soka.s_addr));
}
SCM_PROC (s_inet_ntoa, "inet-ntoa", 1, 0, 0, scm_inet_ntoa);
SCM
scm_inet_ntoa (inetid)
SCM inetid;
{
struct in_addr addr;
char *s;
SCM answer;
addr.s_addr = htonl (scm_num2ulong (inetid, (char *) SCM_ARG1, s_inet_ntoa));
s = inet_ntoa (addr);
answer = scm_makfromstr (s, strlen (s), 0);
return answer;
}
#ifdef HAVE_INET_NETOF
SCM_PROC (s_inet_netof, "inet-netof", 1, 0, 0, scm_inet_netof);
SCM
scm_inet_netof (address)
SCM address;
{
struct in_addr addr;
addr.s_addr = htonl (scm_num2ulong (address, (char *) SCM_ARG1, s_inet_netof));
return scm_ulong2num ((unsigned long) inet_netof (addr));
}
#endif
#ifdef HAVE_INET_LNAOF
SCM_PROC (s_lnaof, "inet-lnaof", 1, 0, 0, scm_lnaof);
SCM
scm_lnaof (address)
SCM address;
{
struct in_addr addr;
addr.s_addr = htonl (scm_num2ulong (address, (char *) SCM_ARG1, s_lnaof));
return scm_ulong2num ((unsigned long) inet_lnaof (addr));
}
#endif
#ifdef HAVE_INET_MAKEADDR
SCM_PROC (s_inet_makeaddr, "inet-makeaddr", 2, 0, 0, scm_inet_makeaddr);
SCM
scm_inet_makeaddr (net, lna)
SCM net;
SCM lna;
{
struct in_addr addr;
unsigned long netnum;
unsigned long lnanum;
netnum = scm_num2ulong (net, (char *) SCM_ARG1, s_inet_makeaddr);
lnanum = scm_num2ulong (lna, (char *) SCM_ARG2, s_inet_makeaddr);
addr = inet_makeaddr (netnum, lnanum);
return scm_ulong2num (ntohl (addr.s_addr));
}
#endif
/* !!! Doesn't take address format.
* Assumes hostent stream isn't reused.
*/
SCM_PROC (s_gethost, "gethost", 0, 1, 0, scm_gethost);
SCM
scm_gethost (name)
SCM name;
{
SCM ans = scm_make_vector (SCM_MAKINUM (5), SCM_UNSPECIFIED);
SCM *ve = SCM_VELTS (ans);
SCM lst = SCM_EOL;
struct hostent *entry;
struct in_addr inad;
char **argv;
int i = 0;
if (SCM_UNBNDP (name))
{
#ifdef HAVE_GETHOSTENT
entry = gethostent ();
#else
entry = NULL;
#endif
if (! entry)
{
/* As far as I can tell, there's no good way to tell whether
zero means an error or end-of-file. The trick of
clearing errno before calling gethostent and checking it
afterwards doesn't cut it, because, on Linux, it seems to
try to contact some other server (YP?) and fails, which
is a benign failure. */
return SCM_BOOL_F;
}
}
else if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
{
SCM_COERCE_SUBSTR (name);
entry = gethostbyname (SCM_ROCHARS (name));
}
else
{
inad.s_addr = htonl (scm_num2ulong (name, (char *) SCM_ARG1, s_gethost));
entry = gethostbyaddr ((char *) &inad, sizeof (inad), AF_INET);
}
if (!entry)
{
char *errmsg;
SCM args;
args = scm_listify (name, SCM_UNDEFINED);
switch (h_errno)
{
case HOST_NOT_FOUND: errmsg = "host %s not found"; break;
case TRY_AGAIN: errmsg = "nameserver failure (try later)"; break;
case NO_RECOVERY: errmsg = "non-recoverable error"; break;
case NO_DATA: errmsg = "no address associated with %s"; break;
default: errmsg = "undefined error"; break;
}
scm_syserror_msg (s_gethost, errmsg, args, h_errno);
}
ve[0] = scm_makfromstr (entry->h_name, (scm_sizet) strlen (entry->h_name), 0);
ve[1] = scm_makfromstrs (-1, entry->h_aliases);
ve[2] = SCM_MAKINUM (entry->h_addrtype + 0L);
ve[3] = SCM_MAKINUM (entry->h_length + 0L);
if (sizeof (struct in_addr) != entry->h_length)
{
ve[4] = SCM_BOOL_F;
return ans;
}
for (argv = entry->h_addr_list; argv[i]; i++);
while (i--)
{
inad = *(struct in_addr *) argv[i];
lst = scm_cons (scm_ulong2num (ntohl (inad.s_addr)), lst);
}
ve[4] = lst;
return ans;
}
/* In all subsequent getMUMBLE functions, when we're called with no
arguments, we're supposed to traverse the tables entry by entry.
However, there doesn't seem to be any documented way to distinguish
between end-of-table and an error; in both cases the functions
return zero. Gotta love Unix. For the time being, we clear errno,
and if we get a zero and errno is set, we signal an error. This
doesn't seem quite right (what if errno gets set as part of healthy
operation?), but it seems to work okay. We'll see. */
#if defined(HAVE_GETNETENT) && defined(HAVE_GETNETBYNAME) && defined(HAVE_GETNETBYADDR)
SCM_PROC (s_getnet, "getnet", 0, 1, 0, scm_getnet);
SCM
scm_getnet (name)
SCM name;
{
SCM ans;
SCM *ve;
struct netent *entry;
ans = scm_make_vector (SCM_MAKINUM (4), SCM_UNSPECIFIED);
ve = SCM_VELTS (ans);
if (SCM_UNBNDP (name))
{
errno = 0;
entry = getnetent ();
if (! entry)
{
if (errno)
scm_syserror (s_getnet);
else
return SCM_BOOL_F;
}
}
else if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
{
SCM_COERCE_SUBSTR (name);
entry = getnetbyname (SCM_ROCHARS (name));
}
else
{
unsigned long netnum;
netnum = scm_num2ulong (name, (char *) SCM_ARG1, s_getnet);
entry = getnetbyaddr (netnum, AF_INET);
}
if (!entry)
scm_syserror_msg (s_getnet, "no such network %s",
scm_listify (name, SCM_UNDEFINED), errno);
ve[0] = scm_makfromstr (entry->n_name, (scm_sizet) strlen (entry->n_name), 0);
ve[1] = scm_makfromstrs (-1, entry->n_aliases);
ve[2] = SCM_MAKINUM (entry->n_addrtype + 0L);
ve[3] = scm_ulong2num (entry->n_net + 0L);
return ans;
}
#endif
#ifdef HAVE_GETPROTOENT
SCM_PROC (s_getproto, "getproto", 0, 1, 0, scm_getproto);
SCM
scm_getproto (name)
SCM name;
{
SCM ans;
SCM *ve;
struct protoent *entry;
ans = scm_make_vector (SCM_MAKINUM (3), SCM_UNSPECIFIED);
ve = SCM_VELTS (ans);
if (SCM_UNBNDP (name))
{
errno = 0;
entry = getprotoent ();
if (! entry)
{
if (errno)
scm_syserror (s_getproto);
else
return SCM_BOOL_F;
}
}
else if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
{
SCM_COERCE_SUBSTR (name);
entry = getprotobyname (SCM_ROCHARS (name));
}
else
{
unsigned long protonum;
protonum = scm_num2ulong (name, (char *) SCM_ARG1, s_getproto);
entry = getprotobynumber (protonum);
}
if (!entry)
scm_syserror_msg (s_getproto, "no such protocol %s",
scm_listify (name, SCM_UNDEFINED), errno);
ve[0] = scm_makfromstr (entry->p_name, (scm_sizet) strlen (entry->p_name), 0);
ve[1] = scm_makfromstrs (-1, entry->p_aliases);
ve[2] = SCM_MAKINUM (entry->p_proto + 0L);
return ans;
}
#endif
static SCM scm_return_entry SCM_P ((struct servent *entry));
static SCM
scm_return_entry (entry)
struct servent *entry;
{
SCM ans;
SCM *ve;
ans = scm_make_vector (SCM_MAKINUM (4), SCM_UNSPECIFIED);
ve = SCM_VELTS (ans);
ve[0] = scm_makfromstr (entry->s_name, (scm_sizet) strlen (entry->s_name), 0);
ve[1] = scm_makfromstrs (-1, entry->s_aliases);
ve[2] = SCM_MAKINUM (ntohs (entry->s_port) + 0L);
ve[3] = scm_makfromstr (entry->s_proto, (scm_sizet) strlen (entry->s_proto), 0);
return ans;
}
#ifdef HAVE_GETSERVENT
SCM_PROC (s_getserv, "getserv", 0, 2, 0, scm_getserv);
SCM
scm_getserv (name, proto)
SCM name;
SCM proto;
{
struct servent *entry;
if (SCM_UNBNDP (name))
{
errno = 0;
entry = getservent ();
if (!entry)
{
if (errno)
scm_syserror (s_getserv);
else
return SCM_BOOL_F;
}
return scm_return_entry (entry);
}
SCM_ASSERT (SCM_NIMP (proto) && SCM_ROSTRINGP (proto), proto, SCM_ARG2, s_getserv);
SCM_COERCE_SUBSTR (proto);
if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
{
SCM_COERCE_SUBSTR (name);
entry = getservbyname (SCM_ROCHARS (name), SCM_ROCHARS (proto));
}
else
{
SCM_ASSERT (SCM_INUMP (name), name, SCM_ARG1, s_getserv);
entry = getservbyport (htons (SCM_INUM (name)), SCM_ROCHARS (proto));
}
if (!entry)
scm_syserror_msg (s_getserv, "no such service %s",
scm_listify (name, SCM_UNDEFINED), errno);
return scm_return_entry (entry);
}
#endif
#if defined(HAVE_SETHOSTENT) && defined(HAVE_ENDHOSTENT)
SCM_PROC (s_sethost, "sethost", 0, 1, 0, scm_sethost);
SCM
scm_sethost (arg)
SCM arg;
{
if (SCM_UNBNDP (arg))
endhostent ();
else
sethostent (SCM_NFALSEP (arg));
return SCM_UNSPECIFIED;
}
#endif
#if defined(HAVE_SETNETENT) && defined(HAVE_ENDNETENT)
SCM_PROC (s_setnet, "setnet", 0, 1, 0, scm_setnet);
SCM
scm_setnet (arg)
SCM arg;
{
if (SCM_UNBNDP (arg))
endnetent ();
else
setnetent (SCM_NFALSEP (arg));
return SCM_UNSPECIFIED;
}
#endif
#if defined(HAVE_SETPROTOENT) && defined(HAVE_ENDPROTOENT)
SCM_PROC (s_setproto, "setproto", 0, 1, 0, scm_setproto);
SCM
scm_setproto (arg)
SCM arg;
{
if (SCM_UNBNDP (arg))
endprotoent ();
else
setprotoent (SCM_NFALSEP (arg));
return SCM_UNSPECIFIED;
}
#endif
#if defined(HAVE_SETSERVENT) && defined(HAVE_ENDSERVENT)
SCM_PROC (s_setserv, "setserv", 0, 1, 0, scm_setserv);
SCM
scm_setserv (arg)
SCM arg;
{
if (SCM_UNBNDP (arg))
endservent ();
else
setservent (SCM_NFALSEP (arg));
return SCM_UNSPECIFIED;
}
#endif
void
scm_init_net_db ()
{
#ifdef INADDR_ANY
scm_sysintern ("INADDR_ANY", scm_ulong2num (INADDR_ANY));
#endif
#ifdef INADDR_BROADCAST
scm_sysintern ("INADDR_BROADCAST", scm_ulong2num (INADDR_BROADCAST));
#endif
#ifdef INADDR_NONE
scm_sysintern ("INADDR_NONE", scm_ulong2num (INADDR_NONE));
#endif
#ifdef INADDR_LOOPBACK
scm_sysintern ("INADDR_LOOPBACK", scm_ulong2num (INADDR_LOOPBACK));
#endif
scm_add_feature ("net-db");
#include "net_db.x"
}
|