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vendor/BIND: Update to 9.5.2-P3
[dragonfly.git] / contrib / bind / bin / named / server.c
blob7812b164c874c2470ad030e6cbd5d18c3c21e036
1 /*
2 * Copyright (C) 2004-2010 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2003 Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /* $Id: server.c,v 1.495.10.29.2.2 2010/02/25 10:56:00 tbox Exp $ */
19
20 /*! \file */
21
22 #include <config.h>
23
24 #include <stdlib.h>
25 #include <unistd.h>
26
27 #include <isc/app.h>
28 #include <isc/base64.h>
29 #include <isc/dir.h>
30 #include <isc/entropy.h>
31 #include <isc/file.h>
32 #include <isc/hash.h>
33 #include <isc/httpd.h>
34 #include <isc/lex.h>
35 #include <isc/parseint.h>
36 #include <isc/portset.h>
37 #include <isc/print.h>
38 #include <isc/resource.h>
39 #include <isc/socket.h>
40 #include <isc/stats.h>
41 #include <isc/stdio.h>
42 #include <isc/string.h>
43 #include <isc/task.h>
44 #include <isc/timer.h>
45 #include <isc/util.h>
46 #include <isc/xml.h>
47
48 #include <isccfg/namedconf.h>
49
50 #include <bind9/check.h>
51
52 #include <dns/acache.h>
53 #include <dns/adb.h>
54 #include <dns/cache.h>
55 #include <dns/db.h>
56 #include <dns/dispatch.h>
57 #ifdef DLZ
58 #include <dns/dlz.h>
59 #endif
60 #include <dns/forward.h>
61 #include <dns/journal.h>
62 #include <dns/keytable.h>
63 #include <dns/lib.h>
64 #include <dns/master.h>
65 #include <dns/masterdump.h>
66 #include <dns/order.h>
67 #include <dns/peer.h>
68 #include <dns/portlist.h>
69 #include <dns/rbt.h>
70 #include <dns/rdataclass.h>
71 #include <dns/rdataset.h>
72 #include <dns/rdatastruct.h>
73 #include <dns/resolver.h>
74 #include <dns/rootns.h>
75 #include <dns/secalg.h>
76 #include <dns/stats.h>
77 #include <dns/tkey.h>
78 #include <dns/tsig.h>
79 #include <dns/view.h>
80 #include <dns/zone.h>
81 #include <dns/zt.h>
82
83 #include <dst/dst.h>
84 #include <dst/result.h>
85
86 #include <named/client.h>
87 #include <named/config.h>
88 #include <named/control.h>
89 #include <named/interfacemgr.h>
90 #include <named/log.h>
91 #include <named/logconf.h>
92 #include <named/lwresd.h>
93 #include <named/main.h>
94 #include <named/os.h>
95 #include <named/server.h>
96 #include <named/statschannel.h>
97 #include <named/tkeyconf.h>
98 #include <named/tsigconf.h>
99 #include <named/zoneconf.h>
100 #ifdef HAVE_LIBSCF
101 #include <named/ns_smf_globals.h>
102 #include <stdlib.h>
103 #endif
104
105 /*%
106 * Check an operation for failure. Assumes that the function
107 * using it has a 'result' variable and a 'cleanup' label.
108 */
109 #define CHECK(op) \
110 do { result = (op); \
111 if (result != ISC_R_SUCCESS) goto cleanup; \
112 } while (0)
113
114 #define CHECKM(op, msg) \
115 do { result = (op); \
116 if (result != ISC_R_SUCCESS) { \
117 isc_log_write(ns_g_lctx, \
118 NS_LOGCATEGORY_GENERAL, \
119 NS_LOGMODULE_SERVER, \
120 ISC_LOG_ERROR, \
121 "%s: %s", msg, \
122 isc_result_totext(result)); \
123 goto cleanup; \
124 } \
125 } while (0) \
126
127 #define CHECKMF(op, msg, file) \
128 do { result = (op); \
129 if (result != ISC_R_SUCCESS) { \
130 isc_log_write(ns_g_lctx, \
131 NS_LOGCATEGORY_GENERAL, \
132 NS_LOGMODULE_SERVER, \
133 ISC_LOG_ERROR, \
134 "%s '%s': %s", msg, file, \
135 isc_result_totext(result)); \
136 goto cleanup; \
137 } \
138 } while (0) \
139
140 #define CHECKFATAL(op, msg) \
141 do { result = (op); \
142 if (result != ISC_R_SUCCESS) \
143 fatal(msg, result); \
144 } while (0) \
145
146 struct ns_dispatch {
147 isc_sockaddr_t addr;
148 unsigned int dispatchgen;
149 dns_dispatch_t *dispatch;
150 ISC_LINK(struct ns_dispatch) link;
151 };
152
153 struct dumpcontext {
154 isc_mem_t *mctx;
155 isc_boolean_t dumpcache;
156 isc_boolean_t dumpzones;
157 FILE *fp;
158 ISC_LIST(struct viewlistentry) viewlist;
159 struct viewlistentry *view;
160 struct zonelistentry *zone;
161 dns_dumpctx_t *mdctx;
162 dns_db_t *db;
163 dns_db_t *cache;
164 isc_task_t *task;
165 dns_dbversion_t *version;
166 };
167
168 struct viewlistentry {
169 dns_view_t *view;
170 ISC_LINK(struct viewlistentry) link;
171 ISC_LIST(struct zonelistentry) zonelist;
172 };
173
174 struct zonelistentry {
175 dns_zone_t *zone;
176 ISC_LINK(struct zonelistentry) link;
177 };
178
179 /*
180 * These zones should not leak onto the Internet.
181 */
182 static const struct {
183 const char *zone;
184 isc_boolean_t rfc1918;
185 } empty_zones[] = {
186 #ifdef notyet
187 /* RFC 1918 */
188 { "10.IN-ADDR.ARPA", ISC_TRUE },
189 { "16.172.IN-ADDR.ARPA", ISC_TRUE },
190 { "17.172.IN-ADDR.ARPA", ISC_TRUE },
191 { "18.172.IN-ADDR.ARPA", ISC_TRUE },
192 { "19.172.IN-ADDR.ARPA", ISC_TRUE },
193 { "20.172.IN-ADDR.ARPA", ISC_TRUE },
194 { "21.172.IN-ADDR.ARPA", ISC_TRUE },
195 { "22.172.IN-ADDR.ARPA", ISC_TRUE },
196 { "23.172.IN-ADDR.ARPA", ISC_TRUE },
197 { "24.172.IN-ADDR.ARPA", ISC_TRUE },
198 { "25.172.IN-ADDR.ARPA", ISC_TRUE },
199 { "26.172.IN-ADDR.ARPA", ISC_TRUE },
200 { "27.172.IN-ADDR.ARPA", ISC_TRUE },
201 { "28.172.IN-ADDR.ARPA", ISC_TRUE },
202 { "29.172.IN-ADDR.ARPA", ISC_TRUE },
203 { "30.172.IN-ADDR.ARPA", ISC_TRUE },
204 { "31.172.IN-ADDR.ARPA", ISC_TRUE },
205 { "168.192.IN-ADDR.ARPA", ISC_TRUE },
206 #endif
207
208 /* RFC 3330 */
209 { "0.IN-ADDR.ARPA", ISC_FALSE }, /* THIS NETWORK */
210 { "127.IN-ADDR.ARPA", ISC_FALSE }, /* LOOPBACK */
211 { "254.169.IN-ADDR.ARPA", ISC_FALSE }, /* LINK LOCAL */
212 { "2.0.192.IN-ADDR.ARPA", ISC_FALSE }, /* TEST NET */
213 { "255.255.255.255.IN-ADDR.ARPA", ISC_FALSE }, /* BROADCAST */
214
215 /* Local IPv6 Unicast Addresses */
216 { "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA", ISC_FALSE },
217 { "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA", ISC_FALSE },
218 /* LOCALLY ASSIGNED LOCAL ADDRESS SCOPE */
219 { "D.F.IP6.ARPA", ISC_FALSE },
220 { "8.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
221 { "9.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
222 { "A.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
223 { "B.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
224
225 { NULL, ISC_FALSE }
226 };
227
228 static void
229 fatal(const char *msg, isc_result_t result);
230
231 static void
232 ns_server_reload(isc_task_t *task, isc_event_t *event);
233
234 static isc_result_t
235 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
236 cfg_aclconfctx_t *actx,
237 isc_mem_t *mctx, ns_listenelt_t **target);
238 static isc_result_t
239 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
240 cfg_aclconfctx_t *actx,
241 isc_mem_t *mctx, ns_listenlist_t **target);
242
243 static isc_result_t
244 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
245 const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype);
246
247 static isc_result_t
248 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
249 const cfg_obj_t *alternates);
250
251 static isc_result_t
252 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
253 const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
254 cfg_aclconfctx_t *aclconf);
255
256 static void
257 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all);
258
259 /*%
260 * Configure a single view ACL at '*aclp'. Get its configuration from
261 * 'vconfig' (for per-view configuration) and maybe from 'config'
262 */
263 static isc_result_t
264 configure_view_acl(const cfg_obj_t *vconfig, const cfg_obj_t *config,
265 const char *aclname, cfg_aclconfctx_t *actx,
266 isc_mem_t *mctx, dns_acl_t **aclp)
267 {
268 isc_result_t result;
269 const cfg_obj_t *maps[3];
270 const cfg_obj_t *aclobj = NULL;
271 int i = 0;
272
273 if (*aclp != NULL)
274 dns_acl_detach(aclp);
275 if (vconfig != NULL)
276 maps[i++] = cfg_tuple_get(vconfig, "options");
277 if (config != NULL) {
278 const cfg_obj_t *options = NULL;
279 (void)cfg_map_get(config, "options", &options);
280 if (options != NULL)
281 maps[i++] = options;
282 }
283 maps[i] = NULL;
284
285 (void)ns_config_get(maps, aclname, &aclobj);
286 if (aclobj == NULL)
287 /*
288 * No value available. *aclp == NULL.
289 */
290 return (ISC_R_SUCCESS);
291
292 result = cfg_acl_fromconfig(aclobj, config, ns_g_lctx,
293 actx, mctx, 0, aclp);
294
295 return (result);
296 }
297
298
299 /*%
300 * Configure a sortlist at '*aclp'. Essentially the same as
301 * configure_view_acl() except it calls cfg_acl_fromconfig with a
302 * nest_level value of 2.
303 */
304 static isc_result_t
305 configure_view_sortlist(const cfg_obj_t *vconfig, const cfg_obj_t *config,
306 cfg_aclconfctx_t *actx, isc_mem_t *mctx,
307 dns_acl_t **aclp)
308 {
309 isc_result_t result;
310 const cfg_obj_t *maps[3];
311 const cfg_obj_t *aclobj = NULL;
312 int i = 0;
313
314 if (*aclp != NULL)
315 dns_acl_detach(aclp);
316 if (vconfig != NULL)
317 maps[i++] = cfg_tuple_get(vconfig, "options");
318 if (config != NULL) {
319 const cfg_obj_t *options = NULL;
320 (void)cfg_map_get(config, "options", &options);
321 if (options != NULL)
322 maps[i++] = options;
323 }
324 maps[i] = NULL;
325
326 (void)ns_config_get(maps, "sortlist", &aclobj);
327 if (aclobj == NULL)
328 return (ISC_R_SUCCESS);
329
330 /*
331 * Use a nest level of 3 for the "top level" of the sortlist;
332 * this means each entry in the top three levels will be stored
333 * as lists of separate, nested ACLs, rather than merged together
334 * into IP tables as is usually done with ACLs.
335 */
336 result = cfg_acl_fromconfig(aclobj, config, ns_g_lctx,
337 actx, mctx, 3, aclp);
338
339 return (result);
340 }
341
342 static isc_result_t
343 configure_view_dnsseckey(const cfg_obj_t *vconfig, const cfg_obj_t *key,
344 dns_keytable_t *keytable, isc_mem_t *mctx)
345 {
346 dns_rdataclass_t viewclass;
347 dns_rdata_dnskey_t keystruct;
348 isc_uint32_t flags, proto, alg;
349 const char *keystr, *keynamestr;
350 unsigned char keydata[4096];
351 isc_buffer_t keydatabuf;
352 unsigned char rrdata[4096];
353 isc_buffer_t rrdatabuf;
354 isc_region_t r;
355 dns_fixedname_t fkeyname;
356 dns_name_t *keyname;
357 isc_buffer_t namebuf;
358 isc_result_t result;
359 dst_key_t *dstkey = NULL;
360
361 flags = cfg_obj_asuint32(cfg_tuple_get(key, "flags"));
362 proto = cfg_obj_asuint32(cfg_tuple_get(key, "protocol"));
363 alg = cfg_obj_asuint32(cfg_tuple_get(key, "algorithm"));
364 keyname = dns_fixedname_name(&fkeyname);
365 keynamestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
366
367 if (vconfig == NULL)
368 viewclass = dns_rdataclass_in;
369 else {
370 const cfg_obj_t *classobj = cfg_tuple_get(vconfig, "class");
371 CHECK(ns_config_getclass(classobj, dns_rdataclass_in,
372 &viewclass));
373 }
374 keystruct.common.rdclass = viewclass;
375 keystruct.common.rdtype = dns_rdatatype_dnskey;
376 /*
377 * The key data in keystruct is not dynamically allocated.
378 */
379 keystruct.mctx = NULL;
380
381 ISC_LINK_INIT(&keystruct.common, link);
382
383 if (flags > 0xffff)
384 CHECKM(ISC_R_RANGE, "key flags");
385 if (proto > 0xff)
386 CHECKM(ISC_R_RANGE, "key protocol");
387 if (alg > 0xff)
388 CHECKM(ISC_R_RANGE, "key algorithm");
389 keystruct.flags = (isc_uint16_t)flags;
390 keystruct.protocol = (isc_uint8_t)proto;
391 keystruct.algorithm = (isc_uint8_t)alg;
392
393 isc_buffer_init(&keydatabuf, keydata, sizeof(keydata));
394 isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));
395
396 keystr = cfg_obj_asstring(cfg_tuple_get(key, "key"));
397 CHECK(isc_base64_decodestring(keystr, &keydatabuf));
398 isc_buffer_usedregion(&keydatabuf, &r);
399 keystruct.datalen = r.length;
400 keystruct.data = r.base;
401
402 if ((keystruct.algorithm == DST_ALG_RSASHA1 ||
403 keystruct.algorithm == DST_ALG_RSAMD5) &&
404 r.length > 1 && r.base[0] == 1 && r.base[1] == 3)
405 cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
406 "trusted key '%s' has a weak exponent",
407 keynamestr);
408
409 CHECK(dns_rdata_fromstruct(NULL,
410 keystruct.common.rdclass,
411 keystruct.common.rdtype,
412 &keystruct, &rrdatabuf));
413 dns_fixedname_init(&fkeyname);
414 isc_buffer_init(&namebuf, keynamestr, strlen(keynamestr));
415 isc_buffer_add(&namebuf, strlen(keynamestr));
416 CHECK(dns_name_fromtext(keyname, &namebuf,
417 dns_rootname, ISC_FALSE,
418 NULL));
419 CHECK(dst_key_fromdns(keyname, viewclass, &rrdatabuf,
420 mctx, &dstkey));
421
422 CHECK(dns_keytable_add(keytable, &dstkey));
423 INSIST(dstkey == NULL);
424 return (ISC_R_SUCCESS);
425
426 cleanup:
427 if (result == DST_R_NOCRYPTO) {
428 cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
429 "ignoring trusted key for '%s': no crypto support",
430 keynamestr);
431 result = ISC_R_SUCCESS;
432 } else {
433 cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
434 "configuring trusted key for '%s': %s",
435 keynamestr, isc_result_totext(result));
436 result = ISC_R_FAILURE;
437 }
438
439 if (dstkey != NULL)
440 dst_key_free(&dstkey);
441
442 return (result);
443 }
444
445 /*%
446 * Configure DNSSEC keys for a view. Currently used only for
447 * the security roots.
448 *
449 * The per-view configuration values and the server-global defaults are read
450 * from 'vconfig' and 'config'. The variable to be configured is '*target'.
451 */
452 static isc_result_t
453 configure_view_dnsseckeys(const cfg_obj_t *vconfig, const cfg_obj_t *config,
454 isc_mem_t *mctx, dns_keytable_t **target)
455 {
456 isc_result_t result;
457 const cfg_obj_t *keys = NULL;
458 const cfg_obj_t *voptions = NULL;
459 const cfg_listelt_t *element, *element2;
460 const cfg_obj_t *keylist;
461 const cfg_obj_t *key;
462 dns_keytable_t *keytable = NULL;
463
464 CHECK(dns_keytable_create(mctx, &keytable));
465
466 if (vconfig != NULL)
467 voptions = cfg_tuple_get(vconfig, "options");
468
469 keys = NULL;
470 if (voptions != NULL)
471 (void)cfg_map_get(voptions, "trusted-keys", &keys);
472 if (keys == NULL)
473 (void)cfg_map_get(config, "trusted-keys", &keys);
474
475 for (element = cfg_list_first(keys);
476 element != NULL;
477 element = cfg_list_next(element))
478 {
479 keylist = cfg_listelt_value(element);
480 for (element2 = cfg_list_first(keylist);
481 element2 != NULL;
482 element2 = cfg_list_next(element2))
483 {
484 key = cfg_listelt_value(element2);
485 CHECK(configure_view_dnsseckey(vconfig, key,
486 keytable, mctx));
487 }
488 }
489
490 dns_keytable_detach(target);
491 *target = keytable; /* Transfer ownership. */
492 keytable = NULL;
493 result = ISC_R_SUCCESS;
494
495 cleanup:
496 return (result);
497 }
498
499 static isc_result_t
500 mustbesecure(const cfg_obj_t *mbs, dns_resolver_t *resolver)
501 {
502 const cfg_listelt_t *element;
503 const cfg_obj_t *obj;
504 const char *str;
505 dns_fixedname_t fixed;
506 dns_name_t *name;
507 isc_boolean_t value;
508 isc_result_t result;
509 isc_buffer_t b;
510
511 dns_fixedname_init(&fixed);
512 name = dns_fixedname_name(&fixed);
513 for (element = cfg_list_first(mbs);
514 element != NULL;
515 element = cfg_list_next(element))
516 {
517 obj = cfg_listelt_value(element);
518 str = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
519 isc_buffer_init(&b, str, strlen(str));
520 isc_buffer_add(&b, strlen(str));
521 CHECK(dns_name_fromtext(name, &b, dns_rootname,
522 ISC_FALSE, NULL));
523 value = cfg_obj_asboolean(cfg_tuple_get(obj, "value"));
524 CHECK(dns_resolver_setmustbesecure(resolver, name, value));
525 }
526
527 result = ISC_R_SUCCESS;
528
529 cleanup:
530 return (result);
531 }
532
533 /*%
534 * Get a dispatch appropriate for the resolver of a given view.
535 */
536 static isc_result_t
537 get_view_querysource_dispatch(const cfg_obj_t **maps,
538 int af, dns_dispatch_t **dispatchp,
539 isc_boolean_t is_firstview)
540 {
541 isc_result_t result;
542 dns_dispatch_t *disp;
543 isc_sockaddr_t sa;
544 unsigned int attrs, attrmask;
545 const cfg_obj_t *obj = NULL;
546 unsigned int maxdispatchbuffers;
547
548 /*
549 * Make compiler happy.
550 */
551 result = ISC_R_FAILURE;
552
553 switch (af) {
554 case AF_INET:
555 result = ns_config_get(maps, "query-source", &obj);
556 INSIST(result == ISC_R_SUCCESS);
557 break;
558 case AF_INET6:
559 result = ns_config_get(maps, "query-source-v6", &obj);
560 INSIST(result == ISC_R_SUCCESS);
561 break;
562 default:
563 INSIST(0);
564 }
565
566 sa = *(cfg_obj_assockaddr(obj));
567 INSIST(isc_sockaddr_pf(&sa) == af);
568
569 /*
570 * If we don't support this address family, we're done!
571 */
572 switch (af) {
573 case AF_INET:
574 result = isc_net_probeipv4();
575 break;
576 case AF_INET6:
577 result = isc_net_probeipv6();
578 break;
579 default:
580 INSIST(0);
581 }
582 if (result != ISC_R_SUCCESS)
583 return (ISC_R_SUCCESS);
584
585 /*
586 * Try to find a dispatcher that we can share.
587 */
588 attrs = 0;
589 attrs |= DNS_DISPATCHATTR_UDP;
590 switch (af) {
591 case AF_INET:
592 attrs |= DNS_DISPATCHATTR_IPV4;
593 break;
594 case AF_INET6:
595 attrs |= DNS_DISPATCHATTR_IPV6;
596 break;
597 }
598 if (isc_sockaddr_getport(&sa) == 0) {
599 attrs |= DNS_DISPATCHATTR_EXCLUSIVE;
600 maxdispatchbuffers = 4096;
601 } else {
602 INSIST(obj != NULL);
603 if (is_firstview) {
604 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_INFO,
605 "using specific query-source port "
606 "suppresses port randomization and can be "
607 "insecure.");
608 }
609 maxdispatchbuffers = 1000;
610 }
611
612 attrmask = 0;
613 attrmask |= DNS_DISPATCHATTR_UDP;
614 attrmask |= DNS_DISPATCHATTR_TCP;
615 attrmask |= DNS_DISPATCHATTR_IPV4;
616 attrmask |= DNS_DISPATCHATTR_IPV6;
617
618 disp = NULL;
619 result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
620 ns_g_taskmgr, &sa, 4096,
621 maxdispatchbuffers, 32768, 16411, 16433,
622 attrs, attrmask, &disp);
623 if (result != ISC_R_SUCCESS) {
624 isc_sockaddr_t any;
625 char buf[ISC_SOCKADDR_FORMATSIZE];
626
627 switch (af) {
628 case AF_INET:
629 isc_sockaddr_any(&any);
630 break;
631 case AF_INET6:
632 isc_sockaddr_any6(&any);
633 break;
634 }
635 if (isc_sockaddr_equal(&sa, &any))
636 return (ISC_R_SUCCESS);
637 isc_sockaddr_format(&sa, buf, sizeof(buf));
638 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
639 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
640 "could not get query source dispatcher (%s)",
641 buf);
642 return (result);
643 }
644
645 *dispatchp = disp;
646
647 return (ISC_R_SUCCESS);
648 }
649
650 static isc_result_t
651 configure_order(dns_order_t *order, const cfg_obj_t *ent) {
652 dns_rdataclass_t rdclass;
653 dns_rdatatype_t rdtype;
654 const cfg_obj_t *obj;
655 dns_fixedname_t fixed;
656 unsigned int mode = 0;
657 const char *str;
658 isc_buffer_t b;
659 isc_result_t result;
660 isc_boolean_t addroot;
661
662 result = ns_config_getclass(cfg_tuple_get(ent, "class"),
663 dns_rdataclass_any, &rdclass);
664 if (result != ISC_R_SUCCESS)
665 return (result);
666
667 result = ns_config_gettype(cfg_tuple_get(ent, "type"),
668 dns_rdatatype_any, &rdtype);
669 if (result != ISC_R_SUCCESS)
670 return (result);
671
672 obj = cfg_tuple_get(ent, "name");
673 if (cfg_obj_isstring(obj))
674 str = cfg_obj_asstring(obj);
675 else
676 str = "*";
677 addroot = ISC_TF(strcmp(str, "*") == 0);
678 isc_buffer_init(&b, str, strlen(str));
679 isc_buffer_add(&b, strlen(str));
680 dns_fixedname_init(&fixed);
681 result = dns_name_fromtext(dns_fixedname_name(&fixed), &b,
682 dns_rootname, ISC_FALSE, NULL);
683 if (result != ISC_R_SUCCESS)
684 return (result);
685
686 obj = cfg_tuple_get(ent, "ordering");
687 INSIST(cfg_obj_isstring(obj));
688 str = cfg_obj_asstring(obj);
689 if (!strcasecmp(str, "fixed"))
690 mode = DNS_RDATASETATTR_FIXEDORDER;
691 else if (!strcasecmp(str, "random"))
692 mode = DNS_RDATASETATTR_RANDOMIZE;
693 else if (!strcasecmp(str, "cyclic"))
694 mode = 0;
695 else
696 INSIST(0);
697
698 /*
699 * "*" should match everything including the root (BIND 8 compat).
700 * As dns_name_matcheswildcard(".", "*.") returns FALSE add a
701 * explicit entry for "." when the name is "*".
702 */
703 if (addroot) {
704 result = dns_order_add(order, dns_rootname,
705 rdtype, rdclass, mode);
706 if (result != ISC_R_SUCCESS)
707 return (result);
708 }
709
710 return (dns_order_add(order, dns_fixedname_name(&fixed),
711 rdtype, rdclass, mode));
712 }
713
714 static isc_result_t
715 configure_peer(const cfg_obj_t *cpeer, isc_mem_t *mctx, dns_peer_t **peerp) {
716 isc_netaddr_t na;
717 dns_peer_t *peer;
718 const cfg_obj_t *obj;
719 const char *str;
720 isc_result_t result;
721 unsigned int prefixlen;
722
723 cfg_obj_asnetprefix(cfg_map_getname(cpeer), &na, &prefixlen);
724
725 peer = NULL;
726 result = dns_peer_newprefix(mctx, &na, prefixlen, &peer);
727 if (result != ISC_R_SUCCESS)
728 return (result);
729
730 obj = NULL;
731 (void)cfg_map_get(cpeer, "bogus", &obj);
732 if (obj != NULL)
733 CHECK(dns_peer_setbogus(peer, cfg_obj_asboolean(obj)));
734
735 obj = NULL;
736 (void)cfg_map_get(cpeer, "provide-ixfr", &obj);
737 if (obj != NULL)
738 CHECK(dns_peer_setprovideixfr(peer, cfg_obj_asboolean(obj)));
739
740 obj = NULL;
741 (void)cfg_map_get(cpeer, "request-ixfr", &obj);
742 if (obj != NULL)
743 CHECK(dns_peer_setrequestixfr(peer, cfg_obj_asboolean(obj)));
744
745 obj = NULL;
746 (void)cfg_map_get(cpeer, "request-nsid", &obj);
747 if (obj != NULL)
748 CHECK(dns_peer_setrequestnsid(peer, cfg_obj_asboolean(obj)));
749
750 obj = NULL;
751 (void)cfg_map_get(cpeer, "edns", &obj);
752 if (obj != NULL)
753 CHECK(dns_peer_setsupportedns(peer, cfg_obj_asboolean(obj)));
754
755 obj = NULL;
756 (void)cfg_map_get(cpeer, "edns-udp-size", &obj);
757 if (obj != NULL) {
758 isc_uint32_t udpsize = cfg_obj_asuint32(obj);
759 if (udpsize < 512)
760 udpsize = 512;
761 if (udpsize > 4096)
762 udpsize = 4096;
763 CHECK(dns_peer_setudpsize(peer, (isc_uint16_t)udpsize));
764 }
765
766 obj = NULL;
767 (void)cfg_map_get(cpeer, "max-udp-size", &obj);
768 if (obj != NULL) {
769 isc_uint32_t udpsize = cfg_obj_asuint32(obj);
770 if (udpsize < 512)
771 udpsize = 512;
772 if (udpsize > 4096)
773 udpsize = 4096;
774 CHECK(dns_peer_setmaxudp(peer, (isc_uint16_t)udpsize));
775 }
776
777 obj = NULL;
778 (void)cfg_map_get(cpeer, "transfers", &obj);
779 if (obj != NULL)
780 CHECK(dns_peer_settransfers(peer, cfg_obj_asuint32(obj)));
781
782 obj = NULL;
783 (void)cfg_map_get(cpeer, "transfer-format", &obj);
784 if (obj != NULL) {
785 str = cfg_obj_asstring(obj);
786 if (strcasecmp(str, "many-answers") == 0)
787 CHECK(dns_peer_settransferformat(peer,
788 dns_many_answers));
789 else if (strcasecmp(str, "one-answer") == 0)
790 CHECK(dns_peer_settransferformat(peer,
791 dns_one_answer));
792 else
793 INSIST(0);
794 }
795
796 obj = NULL;
797 (void)cfg_map_get(cpeer, "keys", &obj);
798 if (obj != NULL) {
799 result = dns_peer_setkeybycharp(peer, cfg_obj_asstring(obj));
800 if (result != ISC_R_SUCCESS)
801 goto cleanup;
802 }
803
804 obj = NULL;
805 if (na.family == AF_INET)
806 (void)cfg_map_get(cpeer, "transfer-source", &obj);
807 else
808 (void)cfg_map_get(cpeer, "transfer-source-v6", &obj);
809 if (obj != NULL) {
810 result = dns_peer_settransfersource(peer,
811 cfg_obj_assockaddr(obj));
812 if (result != ISC_R_SUCCESS)
813 goto cleanup;
814 ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
815 }
816
817 obj = NULL;
818 if (na.family == AF_INET)
819 (void)cfg_map_get(cpeer, "notify-source", &obj);
820 else
821 (void)cfg_map_get(cpeer, "notify-source-v6", &obj);
822 if (obj != NULL) {
823 result = dns_peer_setnotifysource(peer,
824 cfg_obj_assockaddr(obj));
825 if (result != ISC_R_SUCCESS)
826 goto cleanup;
827 ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
828 }
829
830 obj = NULL;
831 if (na.family == AF_INET)
832 (void)cfg_map_get(cpeer, "query-source", &obj);
833 else
834 (void)cfg_map_get(cpeer, "query-source-v6", &obj);
835 if (obj != NULL) {
836 result = dns_peer_setquerysource(peer,
837 cfg_obj_assockaddr(obj));
838 if (result != ISC_R_SUCCESS)
839 goto cleanup;
840 ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
841 }
842
843 *peerp = peer;
844 return (ISC_R_SUCCESS);
845
846 cleanup:
847 dns_peer_detach(&peer);
848 return (result);
849 }
850
851 static isc_result_t
852 disable_algorithms(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
853 isc_result_t result;
854 const cfg_obj_t *algorithms;
855 const cfg_listelt_t *element;
856 const char *str;
857 dns_fixedname_t fixed;
858 dns_name_t *name;
859 isc_buffer_t b;
860
861 dns_fixedname_init(&fixed);
862 name = dns_fixedname_name(&fixed);
863 str = cfg_obj_asstring(cfg_tuple_get(disabled, "name"));
864 isc_buffer_init(&b, str, strlen(str));
865 isc_buffer_add(&b, strlen(str));
866 CHECK(dns_name_fromtext(name, &b, dns_rootname, ISC_FALSE, NULL));
867
868 algorithms = cfg_tuple_get(disabled, "algorithms");
869 for (element = cfg_list_first(algorithms);
870 element != NULL;
871 element = cfg_list_next(element))
872 {
873 isc_textregion_t r;
874 dns_secalg_t alg;
875
876 DE_CONST(cfg_obj_asstring(cfg_listelt_value(element)), r.base);
877 r.length = strlen(r.base);
878
879 result = dns_secalg_fromtext(&alg, &r);
880 if (result != ISC_R_SUCCESS) {
881 isc_uint8_t ui;
882 result = isc_parse_uint8(&ui, r.base, 10);
883 alg = ui;
884 }
885 if (result != ISC_R_SUCCESS) {
886 cfg_obj_log(cfg_listelt_value(element),
887 ns_g_lctx, ISC_LOG_ERROR,
888 "invalid algorithm");
889 CHECK(result);
890 }
891 CHECK(dns_resolver_disable_algorithm(resolver, name, alg));
892 }
893 cleanup:
894 return (result);
895 }
896
897 static isc_boolean_t
898 on_disable_list(const cfg_obj_t *disablelist, dns_name_t *zonename) {
899 const cfg_listelt_t *element;
900 dns_fixedname_t fixed;
901 dns_name_t *name;
902 isc_result_t result;
903 const cfg_obj_t *value;
904 const char *str;
905 isc_buffer_t b;
906
907 dns_fixedname_init(&fixed);
908 name = dns_fixedname_name(&fixed);
909
910 for (element = cfg_list_first(disablelist);
911 element != NULL;
912 element = cfg_list_next(element))
913 {
914 value = cfg_listelt_value(element);
915 str = cfg_obj_asstring(value);
916 isc_buffer_init(&b, str, strlen(str));
917 isc_buffer_add(&b, strlen(str));
918 result = dns_name_fromtext(name, &b, dns_rootname,
919 ISC_TRUE, NULL);
920 RUNTIME_CHECK(result == ISC_R_SUCCESS);
921 if (dns_name_equal(name, zonename))
922 return (ISC_TRUE);
923 }
924 return (ISC_FALSE);
925 }
926
927 static void
928 check_dbtype(dns_zone_t **zonep, unsigned int dbtypec, const char **dbargv,
929 isc_mem_t *mctx)
930 {
931 char **argv = NULL;
932 unsigned int i;
933 isc_result_t result;
934
935 result = dns_zone_getdbtype(*zonep, &argv, mctx);
936 if (result != ISC_R_SUCCESS) {
937 dns_zone_detach(zonep);
938 return;
939 }
940
941 /*
942 * Check that all the arguments match.
943 */
944 for (i = 0; i < dbtypec; i++)
945 if (argv[i] == NULL || strcmp(argv[i], dbargv[i]) != 0) {
946 dns_zone_detach(zonep);
947 break;
948 }
949
950 /*
951 * Check that there are not extra arguments.
952 */
953 if (i == dbtypec && argv[i] != NULL)
954 dns_zone_detach(zonep);
955 isc_mem_free(mctx, argv);
956 }
957
958 static isc_result_t
959 setquerystats(dns_zone_t *zone, isc_mem_t *mctx, isc_boolean_t on) {
960 isc_result_t result;
961 isc_stats_t *zoneqrystats;
962
963 zoneqrystats = NULL;
964 if (on) {
965 result = isc_stats_create(mctx, &zoneqrystats,
966 dns_nsstatscounter_max);
967 if (result != ISC_R_SUCCESS)
968 return (result);
969 }
970 dns_zone_setrequeststats(zone, zoneqrystats);
971 if (zoneqrystats != NULL)
972 isc_stats_detach(&zoneqrystats);
973
974 return (ISC_R_SUCCESS);
975 }
976
977 static isc_boolean_t
978 cache_reusable(dns_view_t *originview, dns_view_t *view,
979 isc_boolean_t new_zero_no_soattl)
980 {
981 if (originview->checknames != view->checknames ||
982 dns_resolver_getzeronosoattl(originview->resolver) !=
983 new_zero_no_soattl ||
984 originview->acceptexpired != view->acceptexpired ||
985 originview->enablevalidation != view->enablevalidation ||
986 originview->maxcachettl != view->maxcachettl ||
987 originview->maxncachettl != view->maxncachettl) {
988 return (ISC_FALSE);
989 }
990
991 return (ISC_TRUE);
992 }
993
994 /*
995 * Configure 'view' according to 'vconfig', taking defaults from 'config'
996 * where values are missing in 'vconfig'.
997 *
998 * When configuring the default view, 'vconfig' will be NULL and the
999 * global defaults in 'config' used exclusively.
1000 */
1001 static isc_result_t
1002 configure_view(dns_view_t *view, const cfg_obj_t *config,
1003 const cfg_obj_t *vconfig, isc_mem_t *mctx,
1004 cfg_aclconfctx_t *actx, isc_boolean_t need_hints)
1005 {
1006 const cfg_obj_t *maps[4];
1007 const cfg_obj_t *cfgmaps[3];
1008 const cfg_obj_t *options = NULL;
1009 const cfg_obj_t *voptions = NULL;
1010 const cfg_obj_t *forwardtype;
1011 const cfg_obj_t *forwarders;
1012 const cfg_obj_t *alternates;
1013 const cfg_obj_t *zonelist;
1014 #ifdef DLZ
1015 const cfg_obj_t *dlz;
1016 unsigned int dlzargc;
1017 char **dlzargv;
1018 #endif
1019 const cfg_obj_t *disabled;
1020 const cfg_obj_t *obj;
1021 const cfg_listelt_t *element;
1022 in_port_t port;
1023 dns_cache_t *cache = NULL;
1024 isc_result_t result;
1025 isc_uint32_t max_adb_size;
1026 isc_uint32_t max_cache_size;
1027 isc_uint32_t max_acache_size;
1028 isc_uint32_t lame_ttl;
1029 dns_tsig_keyring_t *ring;
1030 dns_view_t *pview = NULL; /* Production view */
1031 isc_mem_t *cmctx;
1032 dns_dispatch_t *dispatch4 = NULL;
1033 dns_dispatch_t *dispatch6 = NULL;
1034 isc_boolean_t reused_cache = ISC_FALSE;
1035 int i;
1036 const char *str;
1037 dns_order_t *order = NULL;
1038 isc_uint32_t udpsize;
1039 unsigned int resopts = 0;
1040 dns_zone_t *zone = NULL;
1041 isc_uint32_t max_clients_per_query;
1042 const char *sep = ": view ";
1043 const char *viewname = view->name;
1044 const char *forview = " for view ";
1045 isc_boolean_t rfc1918;
1046 isc_boolean_t empty_zones_enable;
1047 const cfg_obj_t *disablelist = NULL;
1048 isc_stats_t *resstats = NULL;
1049 dns_stats_t *resquerystats = NULL;
1050 isc_boolean_t zero_no_soattl;
1051
1052 REQUIRE(DNS_VIEW_VALID(view));
1053
1054 cmctx = NULL;
1055
1056 if (config != NULL)
1057 (void)cfg_map_get(config, "options", &options);
1058
1059 i = 0;
1060 if (vconfig != NULL) {
1061 voptions = cfg_tuple_get(vconfig, "options");
1062 maps[i++] = voptions;
1063 }
1064 if (options != NULL)
1065 maps[i++] = options;
1066 maps[i++] = ns_g_defaults;
1067 maps[i] = NULL;
1068
1069 i = 0;
1070 if (voptions != NULL)
1071 cfgmaps[i++] = voptions;
1072 if (config != NULL)
1073 cfgmaps[i++] = config;
1074 cfgmaps[i] = NULL;
1075
1076 if (!strcmp(viewname, "_default")) {
1077 sep = "";
1078 viewname = "";
1079 forview = "";
1080 }
1081
1082 /*
1083 * Set the view's port number for outgoing queries.
1084 */
1085 CHECKM(ns_config_getport(config, &port), "port");
1086 dns_view_setdstport(view, port);
1087
1088 /*
1089 * Create additional cache for this view and zones under the view
1090 * if explicitly enabled.
1091 * XXX950 default to on.
1092 */
1093 obj = NULL;
1094 (void)ns_config_get(maps, "acache-enable", &obj);
1095 if (obj != NULL && cfg_obj_asboolean(obj)) {
1096 cmctx = NULL;
1097 CHECK(isc_mem_create(0, 0, &cmctx));
1098 CHECK(dns_acache_create(&view->acache, cmctx, ns_g_taskmgr,
1099 ns_g_timermgr));
1100 isc_mem_setname(cmctx, "acache", NULL);
1101 isc_mem_detach(&cmctx);
1102 }
1103 if (view->acache != NULL) {
1104 obj = NULL;
1105 result = ns_config_get(maps, "acache-cleaning-interval", &obj);
1106 INSIST(result == ISC_R_SUCCESS);
1107 dns_acache_setcleaninginterval(view->acache,
1108 cfg_obj_asuint32(obj) * 60);
1109
1110 obj = NULL;
1111 result = ns_config_get(maps, "max-acache-size", &obj);
1112 INSIST(result == ISC_R_SUCCESS);
1113 if (cfg_obj_isstring(obj)) {
1114 str = cfg_obj_asstring(obj);
1115 INSIST(strcasecmp(str, "unlimited") == 0);
1116 max_acache_size = ISC_UINT32_MAX;
1117 } else {
1118 isc_resourcevalue_t value;
1119
1120 value = cfg_obj_asuint64(obj);
1121 if (value > ISC_UINT32_MAX) {
1122 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
1123 "'max-acache-size "
1124 "%" ISC_PRINT_QUADFORMAT
1125 "d' is too large",
1126 value);
1127 result = ISC_R_RANGE;
1128 goto cleanup;
1129 }
1130 max_acache_size = (isc_uint32_t)value;
1131 }
1132 dns_acache_setcachesize(view->acache, max_acache_size);
1133 }
1134
1135 /*
1136 * Configure the zones.
1137 */
1138 zonelist = NULL;
1139 if (voptions != NULL)
1140 (void)cfg_map_get(voptions, "zone", &zonelist);
1141 else
1142 (void)cfg_map_get(config, "zone", &zonelist);
1143 for (element = cfg_list_first(zonelist);
1144 element != NULL;
1145 element = cfg_list_next(element))
1146 {
1147 const cfg_obj_t *zconfig = cfg_listelt_value(element);
1148 CHECK(configure_zone(config, zconfig, vconfig, mctx, view,
1149 actx));
1150 }
1151
1152 #ifdef DLZ
1153 /*
1154 * Create Dynamically Loadable Zone driver.
1155 */
1156 dlz = NULL;
1157 if (voptions != NULL)
1158 (void)cfg_map_get(voptions, "dlz", &dlz);
1159 else
1160 (void)cfg_map_get(config, "dlz", &dlz);
1161
1162 obj = NULL;
1163 if (dlz != NULL) {
1164 (void)cfg_map_get(cfg_tuple_get(dlz, "options"),
1165 "database", &obj);
1166 if (obj != NULL) {
1167 char *s = isc_mem_strdup(mctx, cfg_obj_asstring(obj));
1168 if (s == NULL) {
1169 result = ISC_R_NOMEMORY;
1170 goto cleanup;
1171 }
1172
1173 result = dns_dlzstrtoargv(mctx, s, &dlzargc, &dlzargv);
1174 if (result != ISC_R_SUCCESS) {
1175 isc_mem_free(mctx, s);
1176 goto cleanup;
1177 }
1178
1179 obj = cfg_tuple_get(dlz, "name");
1180 result = dns_dlzcreate(mctx, cfg_obj_asstring(obj),
1181 dlzargv[0], dlzargc, dlzargv,
1182 &view->dlzdatabase);
1183 isc_mem_free(mctx, s);
1184 isc_mem_put(mctx, dlzargv, dlzargc * sizeof(*dlzargv));
1185 if (result != ISC_R_SUCCESS)
1186 goto cleanup;
1187 }
1188 }
1189 #endif
1190
1191 /*
1192 * Obtain configuration parameters that affect the decision of whether
1193 * we can reuse/share an existing cache.
1194 */
1195 /* Check-names. */
1196 obj = NULL;
1197 result = ns_checknames_get(maps, "response", &obj);
1198 INSIST(result == ISC_R_SUCCESS);
1199
1200 str = cfg_obj_asstring(obj);
1201 if (strcasecmp(str, "fail") == 0) {
1202 resopts |= DNS_RESOLVER_CHECKNAMES |
1203 DNS_RESOLVER_CHECKNAMESFAIL;
1204 view->checknames = ISC_TRUE;
1205 } else if (strcasecmp(str, "warn") == 0) {
1206 resopts |= DNS_RESOLVER_CHECKNAMES;
1207 view->checknames = ISC_FALSE;
1208 } else if (strcasecmp(str, "ignore") == 0) {
1209 view->checknames = ISC_FALSE;
1210 } else
1211 INSIST(0);
1212
1213 obj = NULL;
1214 result = ns_config_get(maps, "zero-no-soa-ttl-cache", &obj);
1215 INSIST(result == ISC_R_SUCCESS);
1216 zero_no_soattl = cfg_obj_asboolean(obj);
1217
1218 obj = NULL;
1219 result = ns_config_get(maps, "dnssec-accept-expired", &obj);
1220 INSIST(result == ISC_R_SUCCESS);
1221 view->acceptexpired = cfg_obj_asboolean(obj);
1222
1223 obj = NULL;
1224 result = ns_config_get(maps, "dnssec-validation", &obj);
1225 INSIST(result == ISC_R_SUCCESS);
1226 view->enablevalidation = cfg_obj_asboolean(obj);
1227
1228 obj = NULL;
1229 result = ns_config_get(maps, "max-cache-ttl", &obj);
1230 INSIST(result == ISC_R_SUCCESS);
1231 view->maxcachettl = cfg_obj_asuint32(obj);
1232
1233 obj = NULL;
1234 result = ns_config_get(maps, "max-ncache-ttl", &obj);
1235 INSIST(result == ISC_R_SUCCESS);
1236 view->maxncachettl = cfg_obj_asuint32(obj);
1237 if (view->maxncachettl > 7 * 24 * 3600)
1238 view->maxncachettl = 7 * 24 * 3600;
1239
1240 /*
1241 * Configure the view's cache. Try to reuse an existing
1242 * cache if possible, otherwise create a new cache.
1243 * Note that the ADB is not preserved in either case.
1244 * When a matching view is found, the associated statistics are
1245 * also retrieved and reused.
1246 *
1247 * XXX Determining when it is safe to reuse a cache is tricky.
1248 * When the view's configuration changes, the cached data may become
1249 * invalid because it reflects our old view of the world. We check
1250 * some of the configuration parameters that could invalidate the cache,
1251 * but there are other configuration options that should be checked.
1252 * For example, if a view uses a forwarder, changes in the forwarder
1253 * configuration may invalidate the cache. At the moment, it's the
1254 * administrator's responsibility to ensure these configuration options
1255 * don't invalidate reusing.
1256 */
1257 result = dns_viewlist_find(&ns_g_server->viewlist,
1258 view->name, view->rdclass,
1259 &pview);
1260 if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
1261 goto cleanup;
1262 if (pview != NULL) {
1263 if (cache_reusable(pview, view, zero_no_soattl)) {
1264 INSIST(pview->cache != NULL);
1265 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1266 NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(3),
1267 "reusing existing cache");
1268 reused_cache = ISC_TRUE;
1269 dns_cache_attach(pview->cache, &cache);
1270 } else {
1271 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1272 NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
1273 "cache cannot be reused for view %s "
1274 "due to configuration parameter mismatch",
1275 view->name);
1276 }
1277 dns_view_getresstats(pview, &resstats);
1278 dns_view_getresquerystats(pview, &resquerystats);
1279 dns_view_detach(&pview);
1280 }
1281 if (cache == NULL) {
1282 CHECK(isc_mem_create(0, 0, &cmctx));
1283 CHECK(dns_cache_create(cmctx, ns_g_taskmgr, ns_g_timermgr,
1284 view->rdclass, "rbt", 0, NULL, &cache));
1285 isc_mem_setname(cmctx, "cache", NULL);
1286 }
1287 dns_view_setcache(view, cache);
1288
1289 /*
1290 * cache-file cannot be inherited if views are present, but this
1291 * should be caught by the configuration checking stage.
1292 */
1293 obj = NULL;
1294 result = ns_config_get(maps, "cache-file", &obj);
1295 if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") != 0) {
1296 CHECK(dns_cache_setfilename(cache, cfg_obj_asstring(obj)));
1297 if (!reused_cache)
1298 CHECK(dns_cache_load(cache));
1299 }
1300
1301 obj = NULL;
1302 result = ns_config_get(maps, "cleaning-interval", &obj);
1303 INSIST(result == ISC_R_SUCCESS);
1304 dns_cache_setcleaninginterval(cache, cfg_obj_asuint32(obj) * 60);
1305
1306 obj = NULL;
1307 result = ns_config_get(maps, "max-cache-size", &obj);
1308 INSIST(result == ISC_R_SUCCESS);
1309 if (cfg_obj_isstring(obj)) {
1310 str = cfg_obj_asstring(obj);
1311 INSIST(strcasecmp(str, "unlimited") == 0);
1312 max_cache_size = ISC_UINT32_MAX;
1313 } else {
1314 isc_resourcevalue_t value;
1315 value = cfg_obj_asuint64(obj);
1316 if (value > ISC_UINT32_MAX) {
1317 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
1318 "'max-cache-size "
1319 "%" ISC_PRINT_QUADFORMAT "d' is too large",
1320 value);
1321 result = ISC_R_RANGE;
1322 goto cleanup;
1323 }
1324 max_cache_size = (isc_uint32_t)value;
1325 }
1326 dns_cache_setcachesize(cache, max_cache_size);
1327
1328 dns_cache_detach(&cache);
1329
1330 /*
1331 * Resolver.
1332 *
1333 * XXXRTH Hardwired number of tasks.
1334 */
1335 CHECK(get_view_querysource_dispatch(maps, AF_INET, &dispatch4,
1336 ISC_TF(ISC_LIST_PREV(view, link)
1337 == NULL)));
1338 CHECK(get_view_querysource_dispatch(maps, AF_INET6, &dispatch6,
1339 ISC_TF(ISC_LIST_PREV(view, link)
1340 == NULL)));
1341 if (dispatch4 == NULL && dispatch6 == NULL) {
1342 UNEXPECTED_ERROR(__FILE__, __LINE__,
1343 "unable to obtain neither an IPv4 nor"
1344 " an IPv6 dispatch");
1345 result = ISC_R_UNEXPECTED;
1346 goto cleanup;
1347 }
1348 CHECK(dns_view_createresolver(view, ns_g_taskmgr, 31,
1349 ns_g_socketmgr, ns_g_timermgr,
1350 resopts, ns_g_dispatchmgr,
1351 dispatch4, dispatch6));
1352
1353 if (resstats == NULL) {
1354 CHECK(isc_stats_create(mctx, &resstats,
1355 dns_resstatscounter_max));
1356 }
1357 dns_view_setresstats(view, resstats);
1358 if (resquerystats == NULL)
1359 CHECK(dns_rdatatypestats_create(mctx, &resquerystats));
1360 dns_view_setresquerystats(view, resquerystats);
1361
1362 /*
1363 * Set the ADB cache size to 1/8th of the max-cache-size.
1364 */
1365 max_adb_size = 0;
1366 if (max_cache_size != 0) {
1367 max_adb_size = max_cache_size / 8;
1368 if (max_adb_size == 0)
1369 max_adb_size = 1; /* Force minimum. */
1370 }
1371 dns_adb_setadbsize(view->adb, max_adb_size);
1372
1373 /*
1374 * Set resolver's lame-ttl.
1375 */
1376 obj = NULL;
1377 result = ns_config_get(maps, "lame-ttl", &obj);
1378 INSIST(result == ISC_R_SUCCESS);
1379 lame_ttl = cfg_obj_asuint32(obj);
1380 if (lame_ttl > 1800)
1381 lame_ttl = 1800;
1382 dns_resolver_setlamettl(view->resolver, lame_ttl);
1383
1384 /*
1385 * Set the resolver's EDNS UDP size.
1386 */
1387 obj = NULL;
1388 result = ns_config_get(maps, "edns-udp-size", &obj);
1389 INSIST(result == ISC_R_SUCCESS);
1390 udpsize = cfg_obj_asuint32(obj);
1391 if (udpsize < 512)
1392 udpsize = 512;
1393 if (udpsize > 4096)
1394 udpsize = 4096;
1395 dns_resolver_setudpsize(view->resolver, (isc_uint16_t)udpsize);
1396
1397 /*
1398 * Set the maximum UDP response size.
1399 */
1400 obj = NULL;
1401 result = ns_config_get(maps, "max-udp-size", &obj);
1402 INSIST(result == ISC_R_SUCCESS);
1403 udpsize = cfg_obj_asuint32(obj);
1404 if (udpsize < 512)
1405 udpsize = 512;
1406 if (udpsize > 4096)
1407 udpsize = 4096;
1408 view->maxudp = udpsize;
1409
1410 /*
1411 * Set supported DNSSEC algorithms.
1412 */
1413 dns_resolver_reset_algorithms(view->resolver);
1414 disabled = NULL;
1415 (void)ns_config_get(maps, "disable-algorithms", &disabled);
1416 if (disabled != NULL) {
1417 for (element = cfg_list_first(disabled);
1418 element != NULL;
1419 element = cfg_list_next(element))
1420 CHECK(disable_algorithms(cfg_listelt_value(element),
1421 view->resolver));
1422 }
1423
1424 /*
1425 * A global or view "forwarders" option, if present,
1426 * creates an entry for "." in the forwarding table.
1427 */
1428 forwardtype = NULL;
1429 forwarders = NULL;
1430 (void)ns_config_get(maps, "forward", &forwardtype);
1431 (void)ns_config_get(maps, "forwarders", &forwarders);
1432 if (forwarders != NULL)
1433 CHECK(configure_forward(config, view, dns_rootname,
1434 forwarders, forwardtype));
1435
1436 /*
1437 * Dual Stack Servers.
1438 */
1439 alternates = NULL;
1440 (void)ns_config_get(maps, "dual-stack-servers", &alternates);
1441 if (alternates != NULL)
1442 CHECK(configure_alternates(config, view, alternates));
1443
1444 /*
1445 * We have default hints for class IN if we need them.
1446 */
1447 if (view->rdclass == dns_rdataclass_in && view->hints == NULL)
1448 dns_view_sethints(view, ns_g_server->in_roothints);
1449
1450 /*
1451 * If we still have no hints, this is a non-IN view with no
1452 * "hints zone" configured. Issue a warning, except if this
1453 * is a root server. Root servers never need to consult
1454 * their hints, so it's no point requiring users to configure
1455 * them.
1456 */
1457 if (view->hints == NULL) {
1458 dns_zone_t *rootzone = NULL;
1459 (void)dns_view_findzone(view, dns_rootname, &rootzone);
1460 if (rootzone != NULL) {
1461 dns_zone_detach(&rootzone);
1462 need_hints = ISC_FALSE;
1463 }
1464 if (need_hints)
1465 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1466 NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
1467 "no root hints for view '%s'",
1468 view->name);
1469 }
1470
1471 /*
1472 * Configure the view's TSIG keys.
1473 */
1474 ring = NULL;
1475 CHECK(ns_tsigkeyring_fromconfig(config, vconfig, view->mctx, &ring));
1476 dns_view_setkeyring(view, ring);
1477
1478 /*
1479 * Configure the view's peer list.
1480 */
1481 {
1482 const cfg_obj_t *peers = NULL;
1483 const cfg_listelt_t *element;
1484 dns_peerlist_t *newpeers = NULL;
1485
1486 (void)ns_config_get(cfgmaps, "server", &peers);
1487 CHECK(dns_peerlist_new(mctx, &newpeers));
1488 for (element = cfg_list_first(peers);
1489 element != NULL;
1490 element = cfg_list_next(element))
1491 {
1492 const cfg_obj_t *cpeer = cfg_listelt_value(element);
1493 dns_peer_t *peer;
1494
1495 CHECK(configure_peer(cpeer, mctx, &peer));
1496 dns_peerlist_addpeer(newpeers, peer);
1497 dns_peer_detach(&peer);
1498 }
1499 dns_peerlist_detach(&view->peers);
1500 view->peers = newpeers; /* Transfer ownership. */
1501 }
1502
1503 /*
1504 * Configure the views rrset-order.
1505 */
1506 {
1507 const cfg_obj_t *rrsetorder = NULL;
1508 const cfg_listelt_t *element;
1509
1510 (void)ns_config_get(maps, "rrset-order", &rrsetorder);
1511 CHECK(dns_order_create(mctx, &order));
1512 for (element = cfg_list_first(rrsetorder);
1513 element != NULL;
1514 element = cfg_list_next(element))
1515 {
1516 const cfg_obj_t *ent = cfg_listelt_value(element);
1517
1518 CHECK(configure_order(order, ent));
1519 }
1520 if (view->order != NULL)
1521 dns_order_detach(&view->order);
1522 dns_order_attach(order, &view->order);
1523 dns_order_detach(&order);
1524 }
1525 /*
1526 * Copy the aclenv object.
1527 */
1528 dns_aclenv_copy(&view->aclenv, &ns_g_server->aclenv);
1529
1530 /*
1531 * Configure the "match-clients" and "match-destinations" ACL.
1532 */
1533 CHECK(configure_view_acl(vconfig, config, "match-clients", actx,
1534 ns_g_mctx, &view->matchclients));
1535 CHECK(configure_view_acl(vconfig, config, "match-destinations", actx,
1536 ns_g_mctx, &view->matchdestinations));
1537
1538 /*
1539 * Configure the "match-recursive-only" option.
1540 */
1541 obj = NULL;
1542 (void)ns_config_get(maps, "match-recursive-only", &obj);
1543 if (obj != NULL && cfg_obj_asboolean(obj))
1544 view->matchrecursiveonly = ISC_TRUE;
1545 else
1546 view->matchrecursiveonly = ISC_FALSE;
1547
1548 /*
1549 * Configure other configurable data.
1550 */
1551 obj = NULL;
1552 result = ns_config_get(maps, "recursion", &obj);
1553 INSIST(result == ISC_R_SUCCESS);
1554 view->recursion = cfg_obj_asboolean(obj);
1555
1556 obj = NULL;
1557 result = ns_config_get(maps, "auth-nxdomain", &obj);
1558 INSIST(result == ISC_R_SUCCESS);
1559 view->auth_nxdomain = cfg_obj_asboolean(obj);
1560
1561 obj = NULL;
1562 result = ns_config_get(maps, "minimal-responses", &obj);
1563 INSIST(result == ISC_R_SUCCESS);
1564 view->minimalresponses = cfg_obj_asboolean(obj);
1565
1566 obj = NULL;
1567 result = ns_config_get(maps, "transfer-format", &obj);
1568 INSIST(result == ISC_R_SUCCESS);
1569 str = cfg_obj_asstring(obj);
1570 if (strcasecmp(str, "many-answers") == 0)
1571 view->transfer_format = dns_many_answers;
1572 else if (strcasecmp(str, "one-answer") == 0)
1573 view->transfer_format = dns_one_answer;
1574 else
1575 INSIST(0);
1576
1577 /*
1578 * Set sources where additional data and CNAME/DNAME
1579 * targets for authoritative answers may be found.
1580 */
1581 obj = NULL;
1582 result = ns_config_get(maps, "additional-from-auth", &obj);
1583 INSIST(result == ISC_R_SUCCESS);
1584 view->additionalfromauth = cfg_obj_asboolean(obj);
1585 if (view->recursion && ! view->additionalfromauth) {
1586 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
1587 "'additional-from-auth no' is only supported "
1588 "with 'recursion no'");
1589 view->additionalfromauth = ISC_TRUE;
1590 }
1591
1592 obj = NULL;
1593 result = ns_config_get(maps, "additional-from-cache", &obj);
1594 INSIST(result == ISC_R_SUCCESS);
1595 view->additionalfromcache = cfg_obj_asboolean(obj);
1596 if (view->recursion && ! view->additionalfromcache) {
1597 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
1598 "'additional-from-cache no' is only supported "
1599 "with 'recursion no'");
1600 view->additionalfromcache = ISC_TRUE;
1601 }
1602
1603 /*
1604 * Set "allow-query-cache", "allow-query-cache-on",
1605 * "allow-recursion", and "allow-recursion-on" acls if
1606 * configured in named.conf.
1607 */
1608 CHECK(configure_view_acl(vconfig, config, "allow-query-cache",
1609 actx, ns_g_mctx, &view->queryacl));
1610 CHECK(configure_view_acl(vconfig, config, "allow-query-cache-on",
1611 actx, ns_g_mctx, &view->queryonacl));
1612 if (view->queryonacl == NULL)
1613 CHECK(configure_view_acl(NULL, ns_g_config,
1614 "allow-query-cache-on", actx,
1615 ns_g_mctx, &view->queryonacl));
1616 if (strcmp(view->name, "_bind") != 0) {
1617 CHECK(configure_view_acl(vconfig, config, "allow-recursion",
1618 actx, ns_g_mctx,
1619 &view->recursionacl));
1620 CHECK(configure_view_acl(vconfig, config, "allow-recursion-on",
1621 actx, ns_g_mctx,
1622 &view->recursiononacl));
1623 }
1624
1625 /*
1626 * "allow-query-cache" inherits from "allow-recursion" if set,
1627 * otherwise from "allow-query" if set.
1628 * "allow-recursion" inherits from "allow-query-cache" if set,
1629 * otherwise from "allow-query" if set.
1630 */
1631 if (view->queryacl == NULL && view->recursionacl != NULL)
1632 dns_acl_attach(view->recursionacl, &view->queryacl);
1633 if (view->queryacl == NULL && view->recursion)
1634 CHECK(configure_view_acl(vconfig, config, "allow-query",
1635 actx, ns_g_mctx, &view->queryacl));
1636 if (view->recursion &&
1637 view->recursionacl == NULL && view->queryacl != NULL)
1638 dns_acl_attach(view->queryacl, &view->recursionacl);
1639
1640 /*
1641 * Set default "allow-recursion", "allow-recursion-on" and
1642 * "allow-query-cache" acls.
1643 */
1644 if (view->recursionacl == NULL && view->recursion)
1645 CHECK(configure_view_acl(NULL, ns_g_config,
1646 "allow-recursion",
1647 actx, ns_g_mctx,
1648 &view->recursionacl));
1649 if (view->recursiononacl == NULL && view->recursion)
1650 CHECK(configure_view_acl(NULL, ns_g_config,
1651 "allow-recursion-on",
1652 actx, ns_g_mctx,
1653 &view->recursiononacl));
1654 if (view->queryacl == NULL) {
1655 if (view->recursion)
1656 CHECK(configure_view_acl(NULL, ns_g_config,
1657 "allow-query-cache", actx,
1658 ns_g_mctx, &view->queryacl));
1659 else {
1660 if (view->queryacl != NULL)
1661 dns_acl_detach(&view->queryacl);
1662 CHECK(dns_acl_none(ns_g_mctx, &view->queryacl));
1663 }
1664 }
1665
1666 /*
1667 * Configure sortlist, if set
1668 */
1669 CHECK(configure_view_sortlist(vconfig, config, actx, ns_g_mctx,
1670 &view->sortlist));
1671
1672 /*
1673 * Configure default allow-transfer, allow-notify, allow-update
1674 * and allow-update-forwarding ACLs, if set, so they can be
1675 * inherited by zones.
1676 */
1677 if (view->notifyacl == NULL)
1678 CHECK(configure_view_acl(NULL, ns_g_config,
1679 "allow-notify", actx,
1680 ns_g_mctx, &view->notifyacl));
1681 if (view->transferacl == NULL)
1682 CHECK(configure_view_acl(NULL, ns_g_config,
1683 "allow-transfer", actx,
1684 ns_g_mctx, &view->transferacl));
1685 if (view->updateacl == NULL)
1686 CHECK(configure_view_acl(NULL, ns_g_config,
1687 "allow-update", actx,
1688 ns_g_mctx, &view->updateacl));
1689 if (view->upfwdacl == NULL)
1690 CHECK(configure_view_acl(NULL, ns_g_config,
1691 "allow-update-forwarding", actx,
1692 ns_g_mctx, &view->upfwdacl));
1693
1694 obj = NULL;
1695 result = ns_config_get(maps, "request-ixfr", &obj);
1696 INSIST(result == ISC_R_SUCCESS);
1697 view->requestixfr = cfg_obj_asboolean(obj);
1698
1699 obj = NULL;
1700 result = ns_config_get(maps, "provide-ixfr", &obj);
1701 INSIST(result == ISC_R_SUCCESS);
1702 view->provideixfr = cfg_obj_asboolean(obj);
1703
1704 obj = NULL;
1705 result = ns_config_get(maps, "request-nsid", &obj);
1706 INSIST(result == ISC_R_SUCCESS);
1707 view->requestnsid = cfg_obj_asboolean(obj);
1708
1709 obj = NULL;
1710 result = ns_config_get(maps, "max-clients-per-query", &obj);
1711 INSIST(result == ISC_R_SUCCESS);
1712 max_clients_per_query = cfg_obj_asuint32(obj);
1713
1714 obj = NULL;
1715 result = ns_config_get(maps, "clients-per-query", &obj);
1716 INSIST(result == ISC_R_SUCCESS);
1717 dns_resolver_setclientsperquery(view->resolver,
1718 cfg_obj_asuint32(obj),
1719 max_clients_per_query);
1720
1721 obj = NULL;
1722 result = ns_config_get(maps, "dnssec-enable", &obj);
1723 INSIST(result == ISC_R_SUCCESS);
1724 view->enablednssec = cfg_obj_asboolean(obj);
1725
1726 obj = NULL;
1727 result = ns_config_get(maps, "dnssec-lookaside", &obj);
1728 if (result == ISC_R_SUCCESS) {
1729 for (element = cfg_list_first(obj);
1730 element != NULL;
1731 element = cfg_list_next(element))
1732 {
1733 const char *str;
1734 isc_buffer_t b;
1735 dns_name_t *dlv;
1736
1737 obj = cfg_listelt_value(element);
1738 #if 0
1739 dns_fixedname_t fixed;
1740 dns_name_t *name;
1741
1742 /*
1743 * When we support multiple dnssec-lookaside
1744 * entries this is how to find the domain to be
1745 * checked. XXXMPA
1746 */
1747 dns_fixedname_init(&fixed);
1748 name = dns_fixedname_name(&fixed);
1749 str = cfg_obj_asstring(cfg_tuple_get(obj,
1750 "domain"));
1751 isc_buffer_init(&b, str, strlen(str));
1752 isc_buffer_add(&b, strlen(str));
1753 CHECK(dns_name_fromtext(name, &b, dns_rootname,
1754 ISC_TRUE, NULL));
1755 #endif
1756 str = cfg_obj_asstring(cfg_tuple_get(obj,
1757 "trust-anchor"));
1758 isc_buffer_init(&b, str, strlen(str));
1759 isc_buffer_add(&b, strlen(str));
1760 dlv = dns_fixedname_name(&view->dlv_fixed);
1761 CHECK(dns_name_fromtext(dlv, &b, dns_rootname,
1762 ISC_TRUE, NULL));
1763 view->dlv = dns_fixedname_name(&view->dlv_fixed);
1764 }
1765 } else
1766 view->dlv = NULL;
1767
1768 /*
1769 * For now, there is only one kind of trusted keys, the
1770 * "security roots".
1771 */
1772 CHECK(configure_view_dnsseckeys(vconfig, config, mctx,
1773 &view->secroots));
1774 dns_resolver_resetmustbesecure(view->resolver);
1775 obj = NULL;
1776 result = ns_config_get(maps, "dnssec-must-be-secure", &obj);
1777 if (result == ISC_R_SUCCESS)
1778 CHECK(mustbesecure(obj, view->resolver));
1779
1780 obj = NULL;
1781 result = ns_config_get(maps, "preferred-glue", &obj);
1782 if (result == ISC_R_SUCCESS) {
1783 str = cfg_obj_asstring(obj);
1784 if (strcasecmp(str, "a") == 0)
1785 view->preferred_glue = dns_rdatatype_a;
1786 else if (strcasecmp(str, "aaaa") == 0)
1787 view->preferred_glue = dns_rdatatype_aaaa;
1788 else
1789 view->preferred_glue = 0;
1790 } else
1791 view->preferred_glue = 0;
1792
1793 obj = NULL;
1794 result = ns_config_get(maps, "root-delegation-only", &obj);
1795 if (result == ISC_R_SUCCESS) {
1796 dns_view_setrootdelonly(view, ISC_TRUE);
1797 if (!cfg_obj_isvoid(obj)) {
1798 dns_fixedname_t fixed;
1799 dns_name_t *name;
1800 isc_buffer_t b;
1801 const char *str;
1802 const cfg_obj_t *exclude;
1803
1804 dns_fixedname_init(&fixed);
1805 name = dns_fixedname_name(&fixed);
1806 for (element = cfg_list_first(obj);
1807 element != NULL;
1808 element = cfg_list_next(element)) {
1809 exclude = cfg_listelt_value(element);
1810 str = cfg_obj_asstring(exclude);
1811 isc_buffer_init(&b, str, strlen(str));
1812 isc_buffer_add(&b, strlen(str));
1813 CHECK(dns_name_fromtext(name, &b, dns_rootname,
1814 ISC_FALSE, NULL));
1815 CHECK(dns_view_excludedelegationonly(view,
1816 name));
1817 }
1818 }
1819 } else
1820 dns_view_setrootdelonly(view, ISC_FALSE);
1821
1822 /*
1823 * Setup automatic empty zones. If recursion is off then
1824 * they are disabled by default.
1825 */
1826 obj = NULL;
1827 (void)ns_config_get(maps, "empty-zones-enable", &obj);
1828 (void)ns_config_get(maps, "disable-empty-zone", &disablelist);
1829 if (obj == NULL && disablelist == NULL &&
1830 view->rdclass == dns_rdataclass_in) {
1831 rfc1918 = ISC_FALSE;
1832 empty_zones_enable = view->recursion;
1833 } else if (view->rdclass == dns_rdataclass_in) {
1834 rfc1918 = ISC_TRUE;
1835 if (obj != NULL)
1836 empty_zones_enable = cfg_obj_asboolean(obj);
1837 else
1838 empty_zones_enable = view->recursion;
1839 } else {
1840 rfc1918 = ISC_FALSE;
1841 empty_zones_enable = ISC_FALSE;
1842 }
1843 if (empty_zones_enable) {
1844 const char *empty;
1845 int empty_zone = 0;
1846 dns_fixedname_t fixed;
1847 dns_name_t *name;
1848 isc_buffer_t buffer;
1849 const char *str;
1850 char server[DNS_NAME_FORMATSIZE + 1];
1851 char contact[DNS_NAME_FORMATSIZE + 1];
1852 isc_boolean_t logit;
1853 const char *empty_dbtype[4] =
1854 { "_builtin", "empty", NULL, NULL };
1855 int empty_dbtypec = 4;
1856 isc_boolean_t zonestats_on;
1857
1858 dns_fixedname_init(&fixed);
1859 name = dns_fixedname_name(&fixed);
1860
1861 obj = NULL;
1862 result = ns_config_get(maps, "empty-server", &obj);
1863 if (result == ISC_R_SUCCESS) {
1864 str = cfg_obj_asstring(obj);
1865 isc_buffer_init(&buffer, str, strlen(str));
1866 isc_buffer_add(&buffer, strlen(str));
1867 CHECK(dns_name_fromtext(name, &buffer, dns_rootname,
1868 ISC_FALSE, NULL));
1869 isc_buffer_init(&buffer, server, sizeof(server) - 1);
1870 CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
1871 server[isc_buffer_usedlength(&buffer)] = 0;
1872 empty_dbtype[2] = server;
1873 } else
1874 empty_dbtype[2] = "@";
1875
1876 obj = NULL;
1877 result = ns_config_get(maps, "empty-contact", &obj);
1878 if (result == ISC_R_SUCCESS) {
1879 str = cfg_obj_asstring(obj);
1880 isc_buffer_init(&buffer, str, strlen(str));
1881 isc_buffer_add(&buffer, strlen(str));
1882 CHECK(dns_name_fromtext(name, &buffer, dns_rootname,
1883 ISC_FALSE, NULL));
1884 isc_buffer_init(&buffer, contact, sizeof(contact) - 1);
1885 CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
1886 contact[isc_buffer_usedlength(&buffer)] = 0;
1887 empty_dbtype[3] = contact;
1888 } else
1889 empty_dbtype[3] = ".";
1890
1891 obj = NULL;
1892 result = ns_config_get(maps, "zone-statistics", &obj);
1893 INSIST(result == ISC_R_SUCCESS);
1894 zonestats_on = cfg_obj_asboolean(obj);
1895
1896 logit = ISC_TRUE;
1897 for (empty = empty_zones[empty_zone].zone;
1898 empty != NULL;
1899 empty = empty_zones[++empty_zone].zone)
1900 {
1901 dns_forwarders_t *forwarders = NULL;
1902 dns_view_t *pview = NULL;
1903
1904 isc_buffer_init(&buffer, empty, strlen(empty));
1905 isc_buffer_add(&buffer, strlen(empty));
1906 /*
1907 * Look for zone on drop list.
1908 */
1909 CHECK(dns_name_fromtext(name, &buffer, dns_rootname,
1910 ISC_FALSE, NULL));
1911 if (disablelist != NULL &&
1912 on_disable_list(disablelist, name))
1913 continue;
1914
1915 /*
1916 * This zone already exists.
1917 */
1918 (void)dns_view_findzone(view, name, &zone);
1919 if (zone != NULL) {
1920 CHECK(setquerystats(zone, mctx, zonestats_on));
1921 dns_zone_detach(&zone);
1922 continue;
1923 }
1924
1925 /*
1926 * If we would forward this name don't add a
1927 * empty zone for it.
1928 */
1929 result = dns_fwdtable_find(view->fwdtable, name,
1930 &forwarders);
1931 if (result == ISC_R_SUCCESS &&
1932 forwarders->fwdpolicy == dns_fwdpolicy_only)
1933 continue;
1934
1935 if (!rfc1918 && empty_zones[empty_zone].rfc1918) {
1936 if (logit) {
1937 isc_log_write(ns_g_lctx,
1938 NS_LOGCATEGORY_GENERAL,
1939 NS_LOGMODULE_SERVER,
1940 ISC_LOG_WARNING,
1941 "Warning%s%s: "
1942 "'empty-zones-enable/"
1943 "disable-empty-zone' "
1944 "not set: disabling "
1945 "RFC 1918 empty zones",
1946 sep, viewname);
1947 logit = ISC_FALSE;
1948 }
1949 continue;
1950 }
1951
1952 /*
1953 * See if we can re-use a existing zone.
1954 */
1955 result = dns_viewlist_find(&ns_g_server->viewlist,
1956 view->name, view->rdclass,
1957 &pview);
1958 if (result != ISC_R_NOTFOUND &&
1959 result != ISC_R_SUCCESS)
1960 goto cleanup;
1961
1962 if (pview != NULL) {
1963 (void)dns_view_findzone(pview, name, &zone);
1964 dns_view_detach(&pview);
1965 if (zone != NULL)
1966 check_dbtype(&zone, empty_dbtypec,
1967 empty_dbtype, mctx);
1968 if (zone != NULL) {
1969 dns_zone_setview(zone, view);
1970 CHECK(dns_view_addzone(view, zone));
1971 CHECK(setquerystats(zone, mctx,
1972 zonestats_on));
1973 dns_zone_detach(&zone);
1974 continue;
1975 }
1976 }
1977
1978 CHECK(dns_zone_create(&zone, mctx));
1979 CHECK(dns_zone_setorigin(zone, name));
1980 dns_zone_setview(zone, view);
1981 CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
1982 dns_zone_setclass(zone, view->rdclass);
1983 dns_zone_settype(zone, dns_zone_master);
1984 dns_zone_setstats(zone, ns_g_server->zonestats);
1985 CHECK(dns_zone_setdbtype(zone, empty_dbtypec,
1986 empty_dbtype));
1987 if (view->queryacl != NULL)
1988 dns_zone_setqueryacl(zone, view->queryacl);
1989 if (view->queryonacl != NULL)
1990 dns_zone_setqueryonacl(zone, view->queryonacl);
1991 dns_zone_setdialup(zone, dns_dialuptype_no);
1992 dns_zone_setnotifytype(zone, dns_notifytype_no);
1993 dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS,
1994 ISC_TRUE);
1995 CHECK(setquerystats(zone, mctx, zonestats_on));
1996 CHECK(dns_view_addzone(view, zone));
1997 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1998 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
1999 "automatic empty zone%s%s: %s",
2000 sep, viewname, empty);
2001 dns_zone_detach(&zone);
2002 }
2003 }
2004
2005 result = ISC_R_SUCCESS;
2006
2007 cleanup:
2008 if (zone != NULL)
2009 dns_zone_detach(&zone);
2010 if (dispatch4 != NULL)
2011 dns_dispatch_detach(&dispatch4);
2012 if (dispatch6 != NULL)
2013 dns_dispatch_detach(&dispatch6);
2014 if (resstats != NULL)
2015 isc_stats_detach(&resstats);
2016 if (resquerystats != NULL)
2017 dns_stats_detach(&resquerystats);
2018 if (order != NULL)
2019 dns_order_detach(&order);
2020 if (cmctx != NULL)
2021 isc_mem_detach(&cmctx);
2022
2023 if (cache != NULL)
2024 dns_cache_detach(&cache);
2025
2026 return (result);
2027 }
2028
2029 static isc_result_t
2030 configure_hints(dns_view_t *view, const char *filename) {
2031 isc_result_t result;
2032 dns_db_t *db;
2033
2034 db = NULL;
2035 result = dns_rootns_create(view->mctx, view->rdclass, filename, &db);
2036 if (result == ISC_R_SUCCESS) {
2037 dns_view_sethints(view, db);
2038 dns_db_detach(&db);
2039 }
2040
2041 return (result);
2042 }
2043
2044 static isc_result_t
2045 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
2046 const cfg_obj_t *alternates)
2047 {
2048 const cfg_obj_t *portobj;
2049 const cfg_obj_t *addresses;
2050 const cfg_listelt_t *element;
2051 isc_result_t result = ISC_R_SUCCESS;
2052 in_port_t port;
2053
2054 /*
2055 * Determine which port to send requests to.
2056 */
2057 if (ns_g_lwresdonly && ns_g_port != 0)
2058 port = ns_g_port;
2059 else
2060 CHECKM(ns_config_getport(config, &port), "port");
2061
2062 if (alternates != NULL) {
2063 portobj = cfg_tuple_get(alternates, "port");
2064 if (cfg_obj_isuint32(portobj)) {
2065 isc_uint32_t val = cfg_obj_asuint32(portobj);
2066 if (val > ISC_UINT16_MAX) {
2067 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
2068 "port '%u' out of range", val);
2069 return (ISC_R_RANGE);
2070 }
2071 port = (in_port_t) val;
2072 }
2073 }
2074
2075 addresses = NULL;
2076 if (alternates != NULL)
2077 addresses = cfg_tuple_get(alternates, "addresses");
2078
2079 for (element = cfg_list_first(addresses);
2080 element != NULL;
2081 element = cfg_list_next(element))
2082 {
2083 const cfg_obj_t *alternate = cfg_listelt_value(element);
2084 isc_sockaddr_t sa;
2085
2086 if (!cfg_obj_issockaddr(alternate)) {
2087 dns_fixedname_t fixed;
2088 dns_name_t *name;
2089 const char *str = cfg_obj_asstring(cfg_tuple_get(
2090 alternate, "name"));
2091 isc_buffer_t buffer;
2092 in_port_t myport = port;
2093
2094 isc_buffer_init(&buffer, str, strlen(str));
2095 isc_buffer_add(&buffer, strlen(str));
2096 dns_fixedname_init(&fixed);
2097 name = dns_fixedname_name(&fixed);
2098 CHECK(dns_name_fromtext(name, &buffer, dns_rootname,
2099 ISC_FALSE, NULL));
2100
2101 portobj = cfg_tuple_get(alternate, "port");
2102 if (cfg_obj_isuint32(portobj)) {
2103 isc_uint32_t val = cfg_obj_asuint32(portobj);
2104 if (val > ISC_UINT16_MAX) {
2105 cfg_obj_log(portobj, ns_g_lctx,
2106 ISC_LOG_ERROR,
2107 "port '%u' out of range",
2108 val);
2109 return (ISC_R_RANGE);
2110 }
2111 myport = (in_port_t) val;
2112 }
2113 CHECK(dns_resolver_addalternate(view->resolver, NULL,
2114 name, myport));
2115 continue;
2116 }
2117
2118 sa = *cfg_obj_assockaddr(alternate);
2119 if (isc_sockaddr_getport(&sa) == 0)
2120 isc_sockaddr_setport(&sa, port);
2121 CHECK(dns_resolver_addalternate(view->resolver, &sa,
2122 NULL, 0));
2123 }
2124
2125 cleanup:
2126 return (result);
2127 }
2128
2129 static isc_result_t
2130 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
2131 const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype)
2132 {
2133 const cfg_obj_t *portobj;
2134 const cfg_obj_t *faddresses;
2135 const cfg_listelt_t *element;
2136 dns_fwdpolicy_t fwdpolicy = dns_fwdpolicy_none;
2137 isc_sockaddrlist_t addresses;
2138 isc_sockaddr_t *sa;
2139 isc_result_t result;
2140 in_port_t port;
2141
2142 ISC_LIST_INIT(addresses);
2143
2144 /*
2145 * Determine which port to send forwarded requests to.
2146 */
2147 if (ns_g_lwresdonly && ns_g_port != 0)
2148 port = ns_g_port;
2149 else
2150 CHECKM(ns_config_getport(config, &port), "port");
2151
2152 if (forwarders != NULL) {
2153 portobj = cfg_tuple_get(forwarders, "port");
2154 if (cfg_obj_isuint32(portobj)) {
2155 isc_uint32_t val = cfg_obj_asuint32(portobj);
2156 if (val > ISC_UINT16_MAX) {
2157 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
2158 "port '%u' out of range", val);
2159 return (ISC_R_RANGE);
2160 }
2161 port = (in_port_t) val;
2162 }
2163 }
2164
2165 faddresses = NULL;
2166 if (forwarders != NULL)
2167 faddresses = cfg_tuple_get(forwarders, "addresses");
2168
2169 for (element = cfg_list_first(faddresses);
2170 element != NULL;
2171 element = cfg_list_next(element))
2172 {
2173 const cfg_obj_t *forwarder = cfg_listelt_value(element);
2174 sa = isc_mem_get(view->mctx, sizeof(isc_sockaddr_t));
2175 if (sa == NULL) {
2176 result = ISC_R_NOMEMORY;
2177 goto cleanup;
2178 }
2179 *sa = *cfg_obj_assockaddr(forwarder);
2180 if (isc_sockaddr_getport(sa) == 0)
2181 isc_sockaddr_setport(sa, port);
2182 ISC_LINK_INIT(sa, link);
2183 ISC_LIST_APPEND(addresses, sa, link);
2184 }
2185
2186 if (ISC_LIST_EMPTY(addresses)) {
2187 if (forwardtype != NULL)
2188 cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
2189 "no forwarders seen; disabling "
2190 "forwarding");
2191 fwdpolicy = dns_fwdpolicy_none;
2192 } else {
2193 if (forwardtype == NULL)
2194 fwdpolicy = dns_fwdpolicy_first;
2195 else {
2196 const char *forwardstr = cfg_obj_asstring(forwardtype);
2197 if (strcasecmp(forwardstr, "first") == 0)
2198 fwdpolicy = dns_fwdpolicy_first;
2199 else if (strcasecmp(forwardstr, "only") == 0)
2200 fwdpolicy = dns_fwdpolicy_only;
2201 else
2202 INSIST(0);
2203 }
2204 }
2205
2206 result = dns_fwdtable_add(view->fwdtable, origin, &addresses,
2207 fwdpolicy);
2208 if (result != ISC_R_SUCCESS) {
2209 char namebuf[DNS_NAME_FORMATSIZE];
2210 dns_name_format(origin, namebuf, sizeof(namebuf));
2211 cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
2212 "could not set up forwarding for domain '%s': %s",
2213 namebuf, isc_result_totext(result));
2214 goto cleanup;
2215 }
2216
2217 result = ISC_R_SUCCESS;
2218
2219 cleanup:
2220
2221 while (!ISC_LIST_EMPTY(addresses)) {
2222 sa = ISC_LIST_HEAD(addresses);
2223 ISC_LIST_UNLINK(addresses, sa, link);
2224 isc_mem_put(view->mctx, sa, sizeof(isc_sockaddr_t));
2225 }
2226
2227 return (result);
2228 }
2229
2230 /*
2231 * Create a new view and add it to the list.
2232 *
2233 * If 'vconfig' is NULL, create the default view.
2234 *
2235 * The view created is attached to '*viewp'.
2236 */
2237 static isc_result_t
2238 create_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
2239 dns_view_t **viewp)
2240 {
2241 isc_result_t result;
2242 const char *viewname;
2243 dns_rdataclass_t viewclass;
2244 dns_view_t *view = NULL;
2245
2246 if (vconfig != NULL) {
2247 const cfg_obj_t *classobj = NULL;
2248
2249 viewname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
2250 classobj = cfg_tuple_get(vconfig, "class");
2251 result = ns_config_getclass(classobj, dns_rdataclass_in,
2252 &viewclass);
2253 } else {
2254 viewname = "_default";
2255 viewclass = dns_rdataclass_in;
2256 }
2257 result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
2258 if (result == ISC_R_SUCCESS)
2259 return (ISC_R_EXISTS);
2260 if (result != ISC_R_NOTFOUND)
2261 return (result);
2262 INSIST(view == NULL);
2263
2264 result = dns_view_create(ns_g_mctx, viewclass, viewname, &view);
2265 if (result != ISC_R_SUCCESS)
2266 return (result);
2267
2268 ISC_LIST_APPEND(*viewlist, view, link);
2269 dns_view_attach(view, viewp);
2270 return (ISC_R_SUCCESS);
2271 }
2272
2273 /*
2274 * Configure or reconfigure a zone.
2275 */
2276 static isc_result_t
2277 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
2278 const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
2279 cfg_aclconfctx_t *aclconf)
2280 {
2281 dns_view_t *pview = NULL; /* Production view */
2282 dns_zone_t *zone = NULL; /* New or reused zone */
2283 dns_zone_t *dupzone = NULL;
2284 const cfg_obj_t *options = NULL;
2285 const cfg_obj_t *zoptions = NULL;
2286 const cfg_obj_t *typeobj = NULL;
2287 const cfg_obj_t *forwarders = NULL;
2288 const cfg_obj_t *forwardtype = NULL;
2289 const cfg_obj_t *only = NULL;
2290 isc_result_t result;
2291 isc_result_t tresult;
2292 isc_buffer_t buffer;
2293 dns_fixedname_t fixorigin;
2294 dns_name_t *origin;
2295 const char *zname;
2296 dns_rdataclass_t zclass;
2297 const char *ztypestr;
2298
2299 options = NULL;
2300 (void)cfg_map_get(config, "options", &options);
2301
2302 zoptions = cfg_tuple_get(zconfig, "options");
2303
2304 /*
2305 * Get the zone origin as a dns_name_t.
2306 */
2307 zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
2308 isc_buffer_init(&buffer, zname, strlen(zname));
2309 isc_buffer_add(&buffer, strlen(zname));
2310 dns_fixedname_init(&fixorigin);
2311 CHECK(dns_name_fromtext(dns_fixedname_name(&fixorigin),
2312 &buffer, dns_rootname, ISC_FALSE, NULL));
2313 origin = dns_fixedname_name(&fixorigin);
2314
2315 CHECK(ns_config_getclass(cfg_tuple_get(zconfig, "class"),
2316 view->rdclass, &zclass));
2317 if (zclass != view->rdclass) {
2318 const char *vname = NULL;
2319 if (vconfig != NULL)
2320 vname = cfg_obj_asstring(cfg_tuple_get(vconfig,
2321 "name"));
2322 else
2323 vname = "<default view>";
2324
2325 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2326 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
2327 "zone '%s': wrong class for view '%s'",
2328 zname, vname);
2329 result = ISC_R_FAILURE;
2330 goto cleanup;
2331 }
2332
2333 (void)cfg_map_get(zoptions, "type", &typeobj);
2334 if (typeobj == NULL) {
2335 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
2336 "zone '%s' 'type' not specified", zname);
2337 return (ISC_R_FAILURE);
2338 }
2339 ztypestr = cfg_obj_asstring(typeobj);
2340
2341 /*
2342 * "hints zones" aren't zones. If we've got one,
2343 * configure it and return.
2344 */
2345 if (strcasecmp(ztypestr, "hint") == 0) {
2346 const cfg_obj_t *fileobj = NULL;
2347 if (cfg_map_get(zoptions, "file", &fileobj) != ISC_R_SUCCESS) {
2348 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2349 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
2350 "zone '%s': 'file' not specified",
2351 zname);
2352 result = ISC_R_FAILURE;
2353 goto cleanup;
2354 }
2355 if (dns_name_equal(origin, dns_rootname)) {
2356 const char *hintsfile = cfg_obj_asstring(fileobj);
2357
2358 result = configure_hints(view, hintsfile);
2359 if (result != ISC_R_SUCCESS) {
2360 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2361 NS_LOGMODULE_SERVER,
2362 ISC_LOG_ERROR,
2363 "could not configure root hints "
2364 "from '%s': %s", hintsfile,
2365 isc_result_totext(result));
2366 goto cleanup;
2367 }
2368 /*
2369 * Hint zones may also refer to delegation only points.
2370 */
2371 only = NULL;
2372 tresult = cfg_map_get(zoptions, "delegation-only",
2373 &only);
2374 if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only))
2375 CHECK(dns_view_adddelegationonly(view, origin));
2376 } else {
2377 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2378 NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
2379 "ignoring non-root hint zone '%s'",
2380 zname);
2381 result = ISC_R_SUCCESS;
2382 }
2383 /* Skip ordinary zone processing. */
2384 goto cleanup;
2385 }
2386
2387 /*
2388 * "forward zones" aren't zones either. Translate this syntax into
2389 * the appropriate selective forwarding configuration and return.
2390 */
2391 if (strcasecmp(ztypestr, "forward") == 0) {
2392 forwardtype = NULL;
2393 forwarders = NULL;
2394
2395 (void)cfg_map_get(zoptions, "forward", &forwardtype);
2396 (void)cfg_map_get(zoptions, "forwarders", &forwarders);
2397 result = configure_forward(config, view, origin, forwarders,
2398 forwardtype);
2399 goto cleanup;
2400 }
2401
2402 /*
2403 * "delegation-only zones" aren't zones either.
2404 */
2405 if (strcasecmp(ztypestr, "delegation-only") == 0) {
2406 result = dns_view_adddelegationonly(view, origin);
2407 goto cleanup;
2408 }
2409
2410 /*
2411 * Check for duplicates in the new zone table.
2412 */
2413 result = dns_view_findzone(view, origin, &dupzone);
2414 if (result == ISC_R_SUCCESS) {
2415 /*
2416 * We already have this zone!
2417 */
2418 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
2419 "zone '%s' already exists", zname);
2420 dns_zone_detach(&dupzone);
2421 result = ISC_R_EXISTS;
2422 goto cleanup;
2423 }
2424 INSIST(dupzone == NULL);
2425
2426 /*
2427 * See if we can reuse an existing zone. This is
2428 * only possible if all of these are true:
2429 * - The zone's view exists
2430 * - A zone with the right name exists in the view
2431 * - The zone is compatible with the config
2432 * options (e.g., an existing master zone cannot
2433 * be reused if the options specify a slave zone)
2434 */
2435 result = dns_viewlist_find(&ns_g_server->viewlist,
2436 view->name, view->rdclass,
2437 &pview);
2438 if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
2439 goto cleanup;
2440 if (pview != NULL)
2441 result = dns_view_findzone(pview, origin, &zone);
2442 if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
2443 goto cleanup;
2444 if (zone != NULL && !ns_zone_reusable(zone, zconfig))
2445 dns_zone_detach(&zone);
2446
2447 if (zone != NULL) {
2448 /*
2449 * We found a reusable zone. Make it use the
2450 * new view.
2451 */
2452 dns_zone_setview(zone, view);
2453 if (view->acache != NULL)
2454 dns_zone_setacache(zone, view->acache);
2455 } else {
2456 /*
2457 * We cannot reuse an existing zone, we have
2458 * to create a new one.
2459 */
2460 CHECK(dns_zone_create(&zone, mctx));
2461 CHECK(dns_zone_setorigin(zone, origin));
2462 dns_zone_setview(zone, view);
2463 if (view->acache != NULL)
2464 dns_zone_setacache(zone, view->acache);
2465 CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
2466 dns_zone_setstats(zone, ns_g_server->zonestats);
2467 }
2468
2469 /*
2470 * If the zone contains a 'forwarders' statement, configure
2471 * selective forwarding.
2472 */
2473 forwarders = NULL;
2474 if (cfg_map_get(zoptions, "forwarders", &forwarders) == ISC_R_SUCCESS)
2475 {
2476 forwardtype = NULL;
2477 (void)cfg_map_get(zoptions, "forward", &forwardtype);
2478 CHECK(configure_forward(config, view, origin, forwarders,
2479 forwardtype));
2480 }
2481
2482 /*
2483 * Stub and forward zones may also refer to delegation only points.
2484 */
2485 only = NULL;
2486 if (cfg_map_get(zoptions, "delegation-only", &only) == ISC_R_SUCCESS)
2487 {
2488 if (cfg_obj_asboolean(only))
2489 CHECK(dns_view_adddelegationonly(view, origin));
2490 }
2491
2492 /*
2493 * Configure the zone.
2494 */
2495 CHECK(ns_zone_configure(config, vconfig, zconfig, aclconf, zone));
2496
2497 /*
2498 * Add the zone to its view in the new view list.
2499 */
2500 CHECK(dns_view_addzone(view, zone));
2501
2502 cleanup:
2503 if (zone != NULL)
2504 dns_zone_detach(&zone);
2505 if (pview != NULL)
2506 dns_view_detach(&pview);
2507
2508 return (result);
2509 }
2510
2511 /*
2512 * Configure a single server quota.
2513 */
2514 static void
2515 configure_server_quota(const cfg_obj_t **maps, const char *name,
2516 isc_quota_t *quota)
2517 {
2518 const cfg_obj_t *obj = NULL;
2519 isc_result_t result;
2520
2521 result = ns_config_get(maps, name, &obj);
2522 INSIST(result == ISC_R_SUCCESS);
2523 isc_quota_max(quota, cfg_obj_asuint32(obj));
2524 }
2525
2526 /*
2527 * This function is called as soon as the 'directory' statement has been
2528 * parsed. This can be extended to support other options if necessary.
2529 */
2530 static isc_result_t
2531 directory_callback(const char *clausename, const cfg_obj_t *obj, void *arg) {
2532 isc_result_t result;
2533 const char *directory;
2534
2535 REQUIRE(strcasecmp("directory", clausename) == 0);
2536
2537 UNUSED(arg);
2538 UNUSED(clausename);
2539
2540 /*
2541 * Change directory.
2542 */
2543 directory = cfg_obj_asstring(obj);
2544
2545 if (! isc_file_ischdiridempotent(directory))
2546 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
2547 "option 'directory' contains relative path '%s'",
2548 directory);
2549
2550 result = isc_dir_chdir(directory);
2551 if (result != ISC_R_SUCCESS) {
2552 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
2553 "change directory to '%s' failed: %s",
2554 directory, isc_result_totext(result));
2555 return (result);
2556 }
2557
2558 return (ISC_R_SUCCESS);
2559 }
2560
2561 static void
2562 scan_interfaces(ns_server_t *server, isc_boolean_t verbose) {
2563 isc_boolean_t match_mapped = server->aclenv.match_mapped;
2564
2565 ns_interfacemgr_scan(server->interfacemgr, verbose);
2566 /*
2567 * Update the "localhost" and "localnets" ACLs to match the
2568 * current set of network interfaces.
2569 */
2570 dns_aclenv_copy(&server->aclenv,
2571 ns_interfacemgr_getaclenv(server->interfacemgr));
2572
2573 server->aclenv.match_mapped = match_mapped;
2574 }
2575
2576 static isc_result_t
2577 add_listenelt(isc_mem_t *mctx, ns_listenlist_t *list, isc_sockaddr_t *addr,
2578 isc_boolean_t wcardport_ok)
2579 {
2580 ns_listenelt_t *lelt = NULL;
2581 dns_acl_t *src_acl = NULL;
2582 isc_result_t result;
2583 isc_sockaddr_t any_sa6;
2584 isc_netaddr_t netaddr;
2585
2586 REQUIRE(isc_sockaddr_pf(addr) == AF_INET6);
2587
2588 isc_sockaddr_any6(&any_sa6);
2589 if (!isc_sockaddr_equal(&any_sa6, addr) &&
2590 (wcardport_ok || isc_sockaddr_getport(addr) != 0)) {
2591 isc_netaddr_fromin6(&netaddr, &addr->type.sin6.sin6_addr);
2592
2593 result = dns_acl_create(mctx, 0, &src_acl);
2594 if (result != ISC_R_SUCCESS)
2595 return (result);
2596
2597 result = dns_iptable_addprefix(src_acl->iptable,
2598 &netaddr, 128, ISC_TRUE);
2599 if (result != ISC_R_SUCCESS)
2600 goto clean;
2601
2602 result = ns_listenelt_create(mctx, isc_sockaddr_getport(addr),
2603 src_acl, &lelt);
2604 if (result != ISC_R_SUCCESS)
2605 goto clean;
2606 ISC_LIST_APPEND(list->elts, lelt, link);
2607 }
2608
2609 return (ISC_R_SUCCESS);
2610
2611 clean:
2612 INSIST(lelt == NULL);
2613 dns_acl_detach(&src_acl);
2614
2615 return (result);
2616 }
2617
2618 /*
2619 * Make a list of xxx-source addresses and call ns_interfacemgr_adjust()
2620 * to update the listening interfaces accordingly.
2621 * We currently only consider IPv6, because this only affects IPv6 wildcard
2622 * sockets.
2623 */
2624 static void
2625 adjust_interfaces(ns_server_t *server, isc_mem_t *mctx) {
2626 isc_result_t result;
2627 ns_listenlist_t *list = NULL;
2628 dns_view_t *view;
2629 dns_zone_t *zone, *next;
2630 isc_sockaddr_t addr, *addrp;
2631
2632 result = ns_listenlist_create(mctx, &list);
2633 if (result != ISC_R_SUCCESS)
2634 return;
2635
2636 for (view = ISC_LIST_HEAD(server->viewlist);
2637 view != NULL;
2638 view = ISC_LIST_NEXT(view, link)) {
2639 dns_dispatch_t *dispatch6;
2640
2641 dispatch6 = dns_resolver_dispatchv6(view->resolver);
2642 if (dispatch6 == NULL)
2643 continue;
2644 result = dns_dispatch_getlocaladdress(dispatch6, &addr);
2645 if (result != ISC_R_SUCCESS)
2646 goto fail;
2647
2648 /*
2649 * We always add non-wildcard address regardless of whether
2650 * the port is 'any' (the fourth arg is TRUE): if the port is
2651 * specific, we need to add it since it may conflict with a
2652 * listening interface; if it's zero, we'll dynamically open
2653 * query ports, and some of them may override an existing
2654 * wildcard IPv6 port.
2655 */
2656 result = add_listenelt(mctx, list, &addr, ISC_TRUE);
2657 if (result != ISC_R_SUCCESS)
2658 goto fail;
2659 }
2660
2661 zone = NULL;
2662 for (result = dns_zone_first(server->zonemgr, &zone);
2663 result == ISC_R_SUCCESS;
2664 next = NULL, result = dns_zone_next(zone, &next), zone = next) {
2665 dns_view_t *zoneview;
2666
2667 /*
2668 * At this point the zone list may contain a stale zone
2669 * just removed from the configuration. To see the validity,
2670 * check if the corresponding view is in our current view list.
2671 * There may also be old zones that are still in the process
2672 * of shutting down and have detached from their old view
2673 * (zoneview == NULL).
2674 */
2675 zoneview = dns_zone_getview(zone);
2676 if (zoneview == NULL)
2677 continue;
2678 for (view = ISC_LIST_HEAD(server->viewlist);
2679 view != NULL && view != zoneview;
2680 view = ISC_LIST_NEXT(view, link))
2681 ;
2682 if (view == NULL)
2683 continue;
2684
2685 addrp = dns_zone_getnotifysrc6(zone);
2686 result = add_listenelt(mctx, list, addrp, ISC_FALSE);
2687 if (result != ISC_R_SUCCESS)
2688 goto fail;
2689
2690 addrp = dns_zone_getxfrsource6(zone);
2691 result = add_listenelt(mctx, list, addrp, ISC_FALSE);
2692 if (result != ISC_R_SUCCESS)
2693 goto fail;
2694 }
2695
2696 ns_interfacemgr_adjust(server->interfacemgr, list, ISC_TRUE);
2697
2698 clean:
2699 ns_listenlist_detach(&list);
2700 return;
2701
2702 fail:
2703 /*
2704 * Even when we failed the procedure, most of other interfaces
2705 * should work correctly. We therefore just warn it.
2706 */
2707 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2708 NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
2709 "could not adjust the listen-on list; "
2710 "some interfaces may not work");
2711 goto clean;
2712 }
2713
2714 /*
2715 * This event callback is invoked to do periodic network
2716 * interface scanning.
2717 */
2718 static void
2719 interface_timer_tick(isc_task_t *task, isc_event_t *event) {
2720 isc_result_t result;
2721 ns_server_t *server = (ns_server_t *) event->ev_arg;
2722 INSIST(task == server->task);
2723 UNUSED(task);
2724 isc_event_free(&event);
2725 /*
2726 * XXX should scan interfaces unlocked and get exclusive access
2727 * only to replace ACLs.
2728 */
2729 result = isc_task_beginexclusive(server->task);
2730 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2731 scan_interfaces(server, ISC_FALSE);
2732 isc_task_endexclusive(server->task);
2733 }
2734
2735 static void
2736 heartbeat_timer_tick(isc_task_t *task, isc_event_t *event) {
2737 ns_server_t *server = (ns_server_t *) event->ev_arg;
2738 dns_view_t *view;
2739
2740 UNUSED(task);
2741 isc_event_free(&event);
2742 view = ISC_LIST_HEAD(server->viewlist);
2743 while (view != NULL) {
2744 dns_view_dialup(view);
2745 view = ISC_LIST_NEXT(view, link);
2746 }
2747 }
2748
2749 static void
2750 pps_timer_tick(isc_task_t *task, isc_event_t *event) {
2751 static unsigned int oldrequests = 0;
2752 unsigned int requests = ns_client_requests;
2753
2754 UNUSED(task);
2755 isc_event_free(&event);
2756
2757 /*
2758 * Don't worry about wrapping as the overflow result will be right.
2759 */
2760 dns_pps = (requests - oldrequests) / 1200;
2761 oldrequests = requests;
2762 }
2763
2764 /*
2765 * Replace the current value of '*field', a dynamically allocated
2766 * string or NULL, with a dynamically allocated copy of the
2767 * null-terminated string pointed to by 'value', or NULL.
2768 */
2769 static isc_result_t
2770 setstring(ns_server_t *server, char **field, const char *value) {
2771 char *copy;
2772
2773 if (value != NULL) {
2774 copy = isc_mem_strdup(server->mctx, value);
2775 if (copy == NULL)
2776 return (ISC_R_NOMEMORY);
2777 } else {
2778 copy = NULL;
2779 }
2780
2781 if (*field != NULL)
2782 isc_mem_free(server->mctx, *field);
2783
2784 *field = copy;
2785 return (ISC_R_SUCCESS);
2786 }
2787
2788 /*
2789 * Replace the current value of '*field', a dynamically allocated
2790 * string or NULL, with another dynamically allocated string
2791 * or NULL if whether 'obj' is a string or void value, respectively.
2792 */
2793 static isc_result_t
2794 setoptstring(ns_server_t *server, char **field, const cfg_obj_t *obj) {
2795 if (cfg_obj_isvoid(obj))
2796 return (setstring(server, field, NULL));
2797 else
2798 return (setstring(server, field, cfg_obj_asstring(obj)));
2799 }
2800
2801 static void
2802 set_limit(const cfg_obj_t **maps, const char *configname,
2803 const char *description, isc_resource_t resourceid,
2804 isc_resourcevalue_t defaultvalue)
2805 {
2806 const cfg_obj_t *obj = NULL;
2807 const char *resource;
2808 isc_resourcevalue_t value;
2809 isc_result_t result;
2810
2811 if (ns_config_get(maps, configname, &obj) != ISC_R_SUCCESS)
2812 return;
2813
2814 if (cfg_obj_isstring(obj)) {
2815 resource = cfg_obj_asstring(obj);
2816 if (strcasecmp(resource, "unlimited") == 0)
2817 value = ISC_RESOURCE_UNLIMITED;
2818 else {
2819 INSIST(strcasecmp(resource, "default") == 0);
2820 value = defaultvalue;
2821 }
2822 } else
2823 value = cfg_obj_asuint64(obj);
2824
2825 result = isc_resource_setlimit(resourceid, value);
2826 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2827 result == ISC_R_SUCCESS ?
2828 ISC_LOG_DEBUG(3) : ISC_LOG_WARNING,
2829 "set maximum %s to %" ISC_PRINT_QUADFORMAT "d: %s",
2830 description, value, isc_result_totext(result));
2831 }
2832
2833 #define SETLIMIT(cfgvar, resource, description) \
2834 set_limit(maps, cfgvar, description, isc_resource_ ## resource, \
2835 ns_g_init ## resource)
2836
2837 static void
2838 set_limits(const cfg_obj_t **maps) {
2839 SETLIMIT("stacksize", stacksize, "stack size");
2840 SETLIMIT("datasize", datasize, "data size");
2841 SETLIMIT("coresize", coresize, "core size");
2842 SETLIMIT("files", openfiles, "open files");
2843 }
2844
2845 static void
2846 portset_fromconf(isc_portset_t *portset, const cfg_obj_t *ports,
2847 isc_boolean_t positive)
2848 {
2849 const cfg_listelt_t *element;
2850
2851 for (element = cfg_list_first(ports);
2852 element != NULL;
2853 element = cfg_list_next(element)) {
2854 const cfg_obj_t *obj = cfg_listelt_value(element);
2855
2856 if (cfg_obj_isuint32(obj)) {
2857 in_port_t port = (in_port_t)cfg_obj_asuint32(obj);
2858
2859 if (positive)
2860 isc_portset_add(portset, port);
2861 else
2862 isc_portset_remove(portset, port);
2863 } else {
2864 const cfg_obj_t *obj_loport, *obj_hiport;
2865 in_port_t loport, hiport;
2866
2867 obj_loport = cfg_tuple_get(obj, "loport");
2868 loport = (in_port_t)cfg_obj_asuint32(obj_loport);
2869 obj_hiport = cfg_tuple_get(obj, "hiport");
2870 hiport = (in_port_t)cfg_obj_asuint32(obj_hiport);
2871
2872 if (positive)
2873 isc_portset_addrange(portset, loport, hiport);
2874 else {
2875 isc_portset_removerange(portset, loport,
2876 hiport);
2877 }
2878 }
2879 }
2880 }
2881
2882 static isc_result_t
2883 removed(dns_zone_t *zone, void *uap) {
2884 const char *type;
2885
2886 if (dns_zone_getview(zone) != uap)
2887 return (ISC_R_SUCCESS);
2888
2889 switch (dns_zone_gettype(zone)) {
2890 case dns_zone_master:
2891 type = "master";
2892 break;
2893 case dns_zone_slave:
2894 type = "slave";
2895 break;
2896 case dns_zone_stub:
2897 type = "stub";
2898 break;
2899 default:
2900 type = "other";
2901 break;
2902 }
2903 dns_zone_log(zone, ISC_LOG_INFO, "(%s) removed", type);
2904 return (ISC_R_SUCCESS);
2905 }
2906
2907 static isc_result_t
2908 load_configuration(const char *filename, ns_server_t *server,
2909 isc_boolean_t first_time)
2910 {
2911 cfg_aclconfctx_t aclconfctx;
2912 cfg_obj_t *config;
2913 cfg_parser_t *parser = NULL;
2914 const cfg_listelt_t *element;
2915 const cfg_obj_t *builtin_views;
2916 const cfg_obj_t *maps[3];
2917 const cfg_obj_t *obj;
2918 const cfg_obj_t *options;
2919 const cfg_obj_t *usev4ports, *avoidv4ports, *usev6ports, *avoidv6ports;
2920 const cfg_obj_t *views;
2921 dns_view_t *view = NULL;
2922 dns_view_t *view_next;
2923 dns_viewlist_t tmpviewlist;
2924 dns_viewlist_t viewlist;
2925 in_port_t listen_port, udpport_low, udpport_high;
2926 int i;
2927 isc_interval_t interval;
2928 isc_portset_t *v4portset = NULL;
2929 isc_portset_t *v6portset = NULL;
2930 isc_resourcevalue_t nfiles;
2931 isc_result_t result;
2932 isc_uint32_t heartbeat_interval;
2933 isc_uint32_t interface_interval;
2934 isc_uint32_t reserved;
2935 isc_uint32_t udpsize;
2936 unsigned int maxsocks;
2937
2938 cfg_aclconfctx_init(&aclconfctx);
2939 ISC_LIST_INIT(viewlist);
2940
2941 /* Ensure exclusive access to configuration data. */
2942 result = isc_task_beginexclusive(server->task);
2943 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2944
2945 /*
2946 * Parse the global default pseudo-config file.
2947 */
2948 if (first_time) {
2949 CHECK(ns_config_parsedefaults(ns_g_parser, &ns_g_config));
2950 RUNTIME_CHECK(cfg_map_get(ns_g_config, "options",
2951 &ns_g_defaults) ==
2952 ISC_R_SUCCESS);
2953 }
2954
2955 /*
2956 * Parse the configuration file using the new config code.
2957 */
2958 result = ISC_R_FAILURE;
2959 config = NULL;
2960
2961 /*
2962 * Unless this is lwresd with the -C option, parse the config file.
2963 */
2964 if (!(ns_g_lwresdonly && lwresd_g_useresolvconf)) {
2965 isc_log_write(ns_g_lctx,
2966 NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2967 ISC_LOG_INFO, "loading configuration from '%s'",
2968 filename);
2969 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &parser));
2970 cfg_parser_setcallback(parser, directory_callback, NULL);
2971 result = cfg_parse_file(parser, filename, &cfg_type_namedconf,
2972 &config);
2973 }
2974
2975 /*
2976 * If this is lwresd with the -C option, or lwresd with no -C or -c
2977 * option where the above parsing failed, parse resolv.conf.
2978 */
2979 if (ns_g_lwresdonly &&
2980 (lwresd_g_useresolvconf ||
2981 (!ns_g_conffileset && result == ISC_R_FILENOTFOUND)))
2982 {
2983 isc_log_write(ns_g_lctx,
2984 NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2985 ISC_LOG_INFO, "loading configuration from '%s'",
2986 lwresd_g_resolvconffile);
2987 if (parser != NULL)
2988 cfg_parser_destroy(&parser);
2989 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &parser));
2990 result = ns_lwresd_parseeresolvconf(ns_g_mctx, parser,
2991 &config);
2992 }
2993 CHECK(result);
2994
2995 /*
2996 * Check the validity of the configuration.
2997 */
2998 CHECK(bind9_check_namedconf(config, ns_g_lctx, ns_g_mctx));
2999
3000 /*
3001 * Fill in the maps array, used for resolving defaults.
3002 */
3003 i = 0;
3004 options = NULL;
3005 result = cfg_map_get(config, "options", &options);
3006 if (result == ISC_R_SUCCESS)
3007 maps[i++] = options;
3008 maps[i++] = ns_g_defaults;
3009 maps[i++] = NULL;
3010
3011 /*
3012 * Set process limits, which (usually) needs to be done as root.
3013 */
3014 set_limits(maps);
3015
3016 /*
3017 * Check if max number of open sockets that the system allows is
3018 * sufficiently large. Failing this condition is not necessarily fatal,
3019 * but may cause subsequent runtime failures for a busy recursive
3020 * server.
3021 */
3022 result = isc_socketmgr_getmaxsockets(ns_g_socketmgr, &maxsocks);
3023 if (result != ISC_R_SUCCESS)
3024 maxsocks = 0;
3025 result = isc_resource_getcurlimit(isc_resource_openfiles, &nfiles);
3026 if (result == ISC_R_SUCCESS && (isc_resourcevalue_t)maxsocks > nfiles) {
3027 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3028 NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3029 "max open files (%" ISC_PRINT_QUADFORMAT "u)"
3030 " is smaller than max sockets (%u)",
3031 nfiles, maxsocks);
3032 }
3033
3034 /*
3035 * Set the number of socket reserved for TCP, stdio etc.
3036 */
3037 obj = NULL;
3038 result = ns_config_get(maps, "reserved-sockets", &obj);
3039 INSIST(result == ISC_R_SUCCESS);
3040 reserved = cfg_obj_asuint32(obj);
3041 if (maxsocks != 0) {
3042 if (maxsocks < 128U) /* Prevent underflow. */
3043 reserved = 0;
3044 else if (reserved > maxsocks - 128U) /* Minimum UDP space. */
3045 reserved = maxsocks - 128;
3046 }
3047 /* Minimum TCP/stdio space. */
3048 if (reserved < 128U)
3049 reserved = 128;
3050 if (reserved + 128U > maxsocks && maxsocks != 0) {
3051 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3052 NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3053 "less than 128 UDP sockets available after "
3054 "applying 'reserved-sockets' and 'maxsockets'");
3055 }
3056 isc__socketmgr_setreserved(ns_g_socketmgr, reserved);
3057
3058 /*
3059 * Configure various server options.
3060 */
3061 configure_server_quota(maps, "transfers-out", &server->xfroutquota);
3062 configure_server_quota(maps, "tcp-clients", &server->tcpquota);
3063 configure_server_quota(maps, "recursive-clients",
3064 &server->recursionquota);
3065 if (server->recursionquota.max > 1000)
3066 isc_quota_soft(&server->recursionquota,
3067 server->recursionquota.max - 100);
3068 else
3069 isc_quota_soft(&server->recursionquota, 0);
3070
3071 CHECK(configure_view_acl(NULL, config, "blackhole", &aclconfctx,
3072 ns_g_mctx, &server->blackholeacl));
3073 if (server->blackholeacl != NULL)
3074 dns_dispatchmgr_setblackhole(ns_g_dispatchmgr,
3075 server->blackholeacl);
3076
3077 obj = NULL;
3078 result = ns_config_get(maps, "match-mapped-addresses", &obj);
3079 INSIST(result == ISC_R_SUCCESS);
3080 server->aclenv.match_mapped = cfg_obj_asboolean(obj);
3081
3082 CHECKM(ns_statschannels_configure(ns_g_server, config, &aclconfctx),
3083 "configuring statistics server(s)");
3084
3085 /*
3086 * Configure sets of UDP query source ports.
3087 */
3088 CHECKM(isc_portset_create(ns_g_mctx, &v4portset),
3089 "creating UDP port set");
3090 CHECKM(isc_portset_create(ns_g_mctx, &v6portset),
3091 "creating UDP port set");
3092
3093 usev4ports = NULL;
3094 usev6ports = NULL;
3095 avoidv4ports = NULL;
3096 avoidv6ports = NULL;
3097
3098 (void)ns_config_get(maps, "use-v4-udp-ports", &usev4ports);
3099 if (usev4ports != NULL)
3100 portset_fromconf(v4portset, usev4ports, ISC_TRUE);
3101 else {
3102 CHECKM(isc_net_getudpportrange(AF_INET, &udpport_low,
3103 &udpport_high),
3104 "get the default UDP/IPv4 port range");
3105 if (udpport_low == udpport_high)
3106 isc_portset_add(v4portset, udpport_low);
3107 else {
3108 isc_portset_addrange(v4portset, udpport_low,
3109 udpport_high);
3110 }
3111 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3112 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3113 "using default UDP/IPv4 port range: [%d, %d]",
3114 udpport_low, udpport_high);
3115 }
3116 (void)ns_config_get(maps, "avoid-v4-udp-ports", &avoidv4ports);
3117 if (avoidv4ports != NULL)
3118 portset_fromconf(v4portset, avoidv4ports, ISC_FALSE);
3119
3120 (void)ns_config_get(maps, "use-v6-udp-ports", &usev6ports);
3121 if (usev6ports != NULL)
3122 portset_fromconf(v6portset, usev6ports, ISC_TRUE);
3123 else {
3124 CHECKM(isc_net_getudpportrange(AF_INET6, &udpport_low,
3125 &udpport_high),
3126 "get the default UDP/IPv6 port range");
3127 if (udpport_low == udpport_high)
3128 isc_portset_add(v6portset, udpport_low);
3129 else {
3130 isc_portset_addrange(v6portset, udpport_low,
3131 udpport_high);
3132 }
3133 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3134 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3135 "using default UDP/IPv6 port range: [%d, %d]",
3136 udpport_low, udpport_high);
3137 }
3138 (void)ns_config_get(maps, "avoid-v6-udp-ports", &avoidv6ports);
3139 if (avoidv6ports != NULL)
3140 portset_fromconf(v6portset, avoidv6ports, ISC_FALSE);
3141
3142 dns_dispatchmgr_setavailports(ns_g_dispatchmgr, v4portset, v6portset);
3143
3144 /*
3145 * Set the EDNS UDP size when we don't match a view.
3146 */
3147 obj = NULL;
3148 result = ns_config_get(maps, "edns-udp-size", &obj);
3149 INSIST(result == ISC_R_SUCCESS);
3150 udpsize = cfg_obj_asuint32(obj);
3151 if (udpsize < 512)
3152 udpsize = 512;
3153 if (udpsize > 4096)
3154 udpsize = 4096;
3155 ns_g_udpsize = (isc_uint16_t)udpsize;
3156
3157 /*
3158 * Configure the zone manager.
3159 */
3160 obj = NULL;
3161 result = ns_config_get(maps, "transfers-in", &obj);
3162 INSIST(result == ISC_R_SUCCESS);
3163 dns_zonemgr_settransfersin(server->zonemgr, cfg_obj_asuint32(obj));
3164
3165 obj = NULL;
3166 result = ns_config_get(maps, "transfers-per-ns", &obj);
3167 INSIST(result == ISC_R_SUCCESS);
3168 dns_zonemgr_settransfersperns(server->zonemgr, cfg_obj_asuint32(obj));
3169
3170 obj = NULL;
3171 result = ns_config_get(maps, "serial-query-rate", &obj);
3172 INSIST(result == ISC_R_SUCCESS);
3173 dns_zonemgr_setserialqueryrate(server->zonemgr, cfg_obj_asuint32(obj));
3174
3175 /*
3176 * Determine which port to use for listening for incoming connections.
3177 */
3178 if (ns_g_port != 0)
3179 listen_port = ns_g_port;
3180 else
3181 CHECKM(ns_config_getport(config, &listen_port), "port");
3182
3183 /*
3184 * Find the listen queue depth.
3185 */
3186 obj = NULL;
3187 result = ns_config_get(maps, "tcp-listen-queue", &obj);
3188 INSIST(result == ISC_R_SUCCESS);
3189 ns_g_listen = cfg_obj_asuint32(obj);
3190 if (ns_g_listen < 3)
3191 ns_g_listen = 3;
3192
3193 /*
3194 * Configure the interface manager according to the "listen-on"
3195 * statement.
3196 */
3197 {
3198 const cfg_obj_t *clistenon = NULL;
3199 ns_listenlist_t *listenon = NULL;
3200
3201 clistenon = NULL;
3202 /*
3203 * Even though listen-on is present in the default
3204 * configuration, we can't use it here, since it isn't
3205 * used if we're in lwresd mode. This way is easier.
3206 */
3207 if (options != NULL)
3208 (void)cfg_map_get(options, "listen-on", &clistenon);
3209 if (clistenon != NULL) {
3210 result = ns_listenlist_fromconfig(clistenon,
3211 config,
3212 &aclconfctx,
3213 ns_g_mctx,
3214 &listenon);
3215 } else if (!ns_g_lwresdonly) {
3216 /*
3217 * Not specified, use default.
3218 */
3219 CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
3220 ISC_TRUE, &listenon));
3221 }
3222 if (listenon != NULL) {
3223 ns_interfacemgr_setlistenon4(server->interfacemgr,
3224 listenon);
3225 ns_listenlist_detach(&listenon);
3226 }
3227 }
3228 /*
3229 * Ditto for IPv6.
3230 */
3231 {
3232 const cfg_obj_t *clistenon = NULL;
3233 ns_listenlist_t *listenon = NULL;
3234
3235 if (options != NULL)
3236 (void)cfg_map_get(options, "listen-on-v6", &clistenon);
3237 if (clistenon != NULL) {
3238 result = ns_listenlist_fromconfig(clistenon,
3239 config,
3240 &aclconfctx,
3241 ns_g_mctx,
3242 &listenon);
3243 } else if (!ns_g_lwresdonly) {
3244 /*
3245 * Not specified, use default.
3246 */
3247 CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
3248 ISC_FALSE, &listenon));
3249 }
3250 if (listenon != NULL) {
3251 ns_interfacemgr_setlistenon6(server->interfacemgr,
3252 listenon);
3253 ns_listenlist_detach(&listenon);
3254 }
3255 }
3256
3257 /*
3258 * Rescan the interface list to pick up changes in the
3259 * listen-on option. It's important that we do this before we try
3260 * to configure the query source, since the dispatcher we use might
3261 * be shared with an interface.
3262 */
3263 scan_interfaces(server, ISC_TRUE);
3264
3265 /*
3266 * Arrange for further interface scanning to occur periodically
3267 * as specified by the "interface-interval" option.
3268 */
3269 obj = NULL;
3270 result = ns_config_get(maps, "interface-interval", &obj);
3271 INSIST(result == ISC_R_SUCCESS);
3272 interface_interval = cfg_obj_asuint32(obj) * 60;
3273 if (interface_interval == 0) {
3274 CHECK(isc_timer_reset(server->interface_timer,
3275 isc_timertype_inactive,
3276 NULL, NULL, ISC_TRUE));
3277 } else if (server->interface_interval != interface_interval) {
3278 isc_interval_set(&interval, interface_interval, 0);
3279 CHECK(isc_timer_reset(server->interface_timer,
3280 isc_timertype_ticker,
3281 NULL, &interval, ISC_FALSE));
3282 }
3283 server->interface_interval = interface_interval;
3284
3285 /*
3286 * Configure the dialup heartbeat timer.
3287 */
3288 obj = NULL;
3289 result = ns_config_get(maps, "heartbeat-interval", &obj);
3290 INSIST(result == ISC_R_SUCCESS);
3291 heartbeat_interval = cfg_obj_asuint32(obj) * 60;
3292 if (heartbeat_interval == 0) {
3293 CHECK(isc_timer_reset(server->heartbeat_timer,
3294 isc_timertype_inactive,
3295 NULL, NULL, ISC_TRUE));
3296 } else if (server->heartbeat_interval != heartbeat_interval) {
3297 isc_interval_set(&interval, heartbeat_interval, 0);
3298 CHECK(isc_timer_reset(server->heartbeat_timer,
3299 isc_timertype_ticker,
3300 NULL, &interval, ISC_FALSE));
3301 }
3302 server->heartbeat_interval = heartbeat_interval;
3303
3304 isc_interval_set(&interval, 1200, 0);
3305 CHECK(isc_timer_reset(server->pps_timer, isc_timertype_ticker, NULL,
3306 &interval, ISC_FALSE));
3307
3308 /*
3309 * Configure and freeze all explicit views. Explicit
3310 * views that have zones were already created at parsing
3311 * time, but views with no zones must be created here.
3312 */
3313 views = NULL;
3314 (void)cfg_map_get(config, "view", &views);
3315 for (element = cfg_list_first(views);
3316 element != NULL;
3317 element = cfg_list_next(element))
3318 {
3319 const cfg_obj_t *vconfig = cfg_listelt_value(element);
3320 view = NULL;
3321
3322 CHECK(create_view(vconfig, &viewlist, &view));
3323 INSIST(view != NULL);
3324 CHECK(configure_view(view, config, vconfig,
3325 ns_g_mctx, &aclconfctx, ISC_TRUE));
3326 dns_view_freeze(view);
3327 dns_view_detach(&view);
3328 }
3329
3330 /*
3331 * Make sure we have a default view if and only if there
3332 * were no explicit views.
3333 */
3334 if (views == NULL) {
3335 /*
3336 * No explicit views; there ought to be a default view.
3337 * There may already be one created as a side effect
3338 * of zone statements, or we may have to create one.
3339 * In either case, we need to configure and freeze it.
3340 */
3341 CHECK(create_view(NULL, &viewlist, &view));
3342 CHECK(configure_view(view, config, NULL, ns_g_mctx,
3343 &aclconfctx, ISC_TRUE));
3344 dns_view_freeze(view);
3345 dns_view_detach(&view);
3346 }
3347
3348 /*
3349 * Create (or recreate) the built-in views. Currently
3350 * there is only one, the _bind view.
3351 */
3352 builtin_views = NULL;
3353 RUNTIME_CHECK(cfg_map_get(ns_g_config, "view",
3354 &builtin_views) == ISC_R_SUCCESS);
3355 for (element = cfg_list_first(builtin_views);
3356 element != NULL;
3357 element = cfg_list_next(element))
3358 {
3359 const cfg_obj_t *vconfig = cfg_listelt_value(element);
3360 CHECK(create_view(vconfig, &viewlist, &view));
3361 CHECK(configure_view(view, config, vconfig, ns_g_mctx,
3362 &aclconfctx, ISC_FALSE));
3363 dns_view_freeze(view);
3364 dns_view_detach(&view);
3365 view = NULL;
3366 }
3367
3368 /*
3369 * Swap our new view list with the production one.
3370 */
3371 tmpviewlist = server->viewlist;
3372 server->viewlist = viewlist;
3373 viewlist = tmpviewlist;
3374
3375 /*
3376 * Load the TKEY information from the configuration.
3377 */
3378 if (options != NULL) {
3379 dns_tkeyctx_t *t = NULL;
3380 CHECKM(ns_tkeyctx_fromconfig(options, ns_g_mctx, ns_g_entropy,
3381 &t),
3382 "configuring TKEY");
3383 if (server->tkeyctx != NULL)
3384 dns_tkeyctx_destroy(&server->tkeyctx);
3385 server->tkeyctx = t;
3386 }
3387
3388 /*
3389 * Bind the control port(s).
3390 */
3391 CHECKM(ns_controls_configure(ns_g_server->controls, config,
3392 &aclconfctx),
3393 "binding control channel(s)");
3394
3395 /*
3396 * Bind the lwresd port(s).
3397 */
3398 CHECKM(ns_lwresd_configure(ns_g_mctx, config),
3399 "binding lightweight resolver ports");
3400
3401 /*
3402 * Open the source of entropy.
3403 */
3404 if (first_time) {
3405 obj = NULL;
3406 result = ns_config_get(maps, "random-device", &obj);
3407 if (result != ISC_R_SUCCESS) {
3408 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3409 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3410 "no source of entropy found");
3411 } else {
3412 const char *randomdev = cfg_obj_asstring(obj);
3413 result = isc_entropy_createfilesource(ns_g_entropy,
3414 randomdev);
3415 if (result != ISC_R_SUCCESS)
3416 isc_log_write(ns_g_lctx,
3417 NS_LOGCATEGORY_GENERAL,
3418 NS_LOGMODULE_SERVER,
3419 ISC_LOG_INFO,
3420 "could not open entropy source "
3421 "%s: %s",
3422 randomdev,
3423 isc_result_totext(result));
3424 #ifdef PATH_RANDOMDEV
3425 if (ns_g_fallbackentropy != NULL) {
3426 if (result != ISC_R_SUCCESS) {
3427 isc_log_write(ns_g_lctx,
3428 NS_LOGCATEGORY_GENERAL,
3429 NS_LOGMODULE_SERVER,
3430 ISC_LOG_INFO,
3431 "using pre-chroot entropy source "
3432 "%s",
3433 PATH_RANDOMDEV);
3434 isc_entropy_detach(&ns_g_entropy);
3435 isc_entropy_attach(ns_g_fallbackentropy,
3436 &ns_g_entropy);
3437 }
3438 isc_entropy_detach(&ns_g_fallbackentropy);
3439 }
3440 #endif
3441 }
3442 }
3443
3444 /*
3445 * Relinquish root privileges.
3446 */
3447 if (first_time)
3448 ns_os_changeuser();
3449
3450 /*
3451 * Check that the working directory is writable.
3452 */
3453 if (access(".", W_OK) != 0) {
3454 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3455 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3456 "the working directory is not writable");
3457 }
3458
3459 /*
3460 * Configure the logging system.
3461 *
3462 * Do this after changing UID to make sure that any log
3463 * files specified in named.conf get created by the
3464 * unprivileged user, not root.
3465 */
3466 if (ns_g_logstderr) {
3467 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3468 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3469 "ignoring config file logging "
3470 "statement due to -g option");
3471 } else {
3472 const cfg_obj_t *logobj = NULL;
3473 isc_logconfig_t *logc = NULL;
3474
3475 CHECKM(isc_logconfig_create(ns_g_lctx, &logc),
3476 "creating new logging configuration");
3477
3478 logobj = NULL;
3479 (void)cfg_map_get(config, "logging", &logobj);
3480 if (logobj != NULL) {
3481 CHECKM(ns_log_configure(logc, logobj),
3482 "configuring logging");
3483 } else {
3484 CHECKM(ns_log_setdefaultchannels(logc),
3485 "setting up default logging channels");
3486 CHECKM(ns_log_setunmatchedcategory(logc),
3487 "setting up default 'category unmatched'");
3488 CHECKM(ns_log_setdefaultcategory(logc),
3489 "setting up default 'category default'");
3490 }
3491
3492 result = isc_logconfig_use(ns_g_lctx, logc);
3493 if (result != ISC_R_SUCCESS) {
3494 isc_logconfig_destroy(&logc);
3495 CHECKM(result, "installing logging configuration");
3496 }
3497
3498 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3499 NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
3500 "now using logging configuration from "
3501 "config file");
3502 }
3503
3504 /*
3505 * Set the default value of the query logging flag depending
3506 * whether a "queries" category has been defined. This is
3507 * a disgusting hack, but we need to do this for BIND 8
3508 * compatibility.
3509 */
3510 if (first_time) {
3511 const cfg_obj_t *logobj = NULL;
3512 const cfg_obj_t *categories = NULL;
3513
3514 obj = NULL;
3515 if (ns_config_get(maps, "querylog", &obj) == ISC_R_SUCCESS) {
3516 server->log_queries = cfg_obj_asboolean(obj);
3517 } else {
3518
3519 (void)cfg_map_get(config, "logging", &logobj);
3520 if (logobj != NULL)
3521 (void)cfg_map_get(logobj, "category",
3522 &categories);
3523 if (categories != NULL) {
3524 const cfg_listelt_t *element;
3525 for (element = cfg_list_first(categories);
3526 element != NULL;
3527 element = cfg_list_next(element))
3528 {
3529 const cfg_obj_t *catobj;
3530 const char *str;
3531
3532 obj = cfg_listelt_value(element);
3533 catobj = cfg_tuple_get(obj, "name");
3534 str = cfg_obj_asstring(catobj);
3535 if (strcasecmp(str, "queries") == 0)
3536 server->log_queries = ISC_TRUE;
3537 }
3538 }
3539 }
3540 }
3541
3542 obj = NULL;
3543 if (ns_config_get(maps, "pid-file", &obj) == ISC_R_SUCCESS)
3544 if (cfg_obj_isvoid(obj))
3545 ns_os_writepidfile(NULL, first_time);
3546 else
3547 ns_os_writepidfile(cfg_obj_asstring(obj), first_time);
3548 else if (ns_g_lwresdonly)
3549 ns_os_writepidfile(lwresd_g_defaultpidfile, first_time);
3550 else
3551 ns_os_writepidfile(ns_g_defaultpidfile, first_time);
3552
3553 obj = NULL;
3554 if (options != NULL &&
3555 cfg_map_get(options, "memstatistics", &obj) == ISC_R_SUCCESS)
3556 ns_g_memstatistics = cfg_obj_asboolean(obj);
3557 else
3558 ns_g_memstatistics =
3559 ISC_TF((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0);
3560
3561 obj = NULL;
3562 if (ns_config_get(maps, "memstatistics-file", &obj) == ISC_R_SUCCESS)
3563 ns_main_setmemstats(cfg_obj_asstring(obj));
3564 else if (ns_g_memstatistics)
3565 ns_main_setmemstats("named.memstats");
3566 else
3567 ns_main_setmemstats(NULL);
3568
3569 obj = NULL;
3570 result = ns_config_get(maps, "statistics-file", &obj);
3571 INSIST(result == ISC_R_SUCCESS);
3572 CHECKM(setstring(server, &server->statsfile, cfg_obj_asstring(obj)),
3573 "strdup");
3574
3575 obj = NULL;
3576 result = ns_config_get(maps, "dump-file", &obj);
3577 INSIST(result == ISC_R_SUCCESS);
3578 CHECKM(setstring(server, &server->dumpfile, cfg_obj_asstring(obj)),
3579 "strdup");
3580
3581 obj = NULL;
3582 result = ns_config_get(maps, "recursing-file", &obj);
3583 INSIST(result == ISC_R_SUCCESS);
3584 CHECKM(setstring(server, &server->recfile, cfg_obj_asstring(obj)),
3585 "strdup");
3586
3587 obj = NULL;
3588 result = ns_config_get(maps, "version", &obj);
3589 if (result == ISC_R_SUCCESS) {
3590 CHECKM(setoptstring(server, &server->version, obj), "strdup");
3591 server->version_set = ISC_TRUE;
3592 } else {
3593 server->version_set = ISC_FALSE;
3594 }
3595
3596 obj = NULL;
3597 result = ns_config_get(maps, "hostname", &obj);
3598 if (result == ISC_R_SUCCESS) {
3599 CHECKM(setoptstring(server, &server->hostname, obj), "strdup");
3600 server->hostname_set = ISC_TRUE;
3601 } else {
3602 server->hostname_set = ISC_FALSE;
3603 }
3604
3605 obj = NULL;
3606 result = ns_config_get(maps, "server-id", &obj);
3607 server->server_usehostname = ISC_FALSE;
3608 if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
3609 /* The parser translates "hostname" to ISC_TRUE */
3610 server->server_usehostname = cfg_obj_asboolean(obj);
3611 result = setstring(server, &server->server_id, NULL);
3612 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3613 } else if (result == ISC_R_SUCCESS) {
3614 /* Found a quoted string */
3615 CHECKM(setoptstring(server, &server->server_id, obj), "strdup");
3616 } else {
3617 result = setstring(server, &server->server_id, NULL);
3618 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3619 }
3620
3621 obj = NULL;
3622 result = ns_config_get(maps, "flush-zones-on-shutdown", &obj);
3623 if (result == ISC_R_SUCCESS) {
3624 server->flushonshutdown = cfg_obj_asboolean(obj);
3625 } else {
3626 server->flushonshutdown = ISC_FALSE;
3627 }
3628
3629 result = ISC_R_SUCCESS;
3630
3631 cleanup:
3632 if (v4portset != NULL)
3633 isc_portset_destroy(ns_g_mctx, &v4portset);
3634
3635 if (v6portset != NULL)
3636 isc_portset_destroy(ns_g_mctx, &v6portset);
3637
3638 cfg_aclconfctx_destroy(&aclconfctx);
3639
3640 if (parser != NULL) {
3641 if (config != NULL)
3642 cfg_obj_destroy(parser, &config);
3643 cfg_parser_destroy(&parser);
3644 }
3645
3646 if (view != NULL)
3647 dns_view_detach(&view);
3648
3649 /*
3650 * This cleans up either the old production view list
3651 * or our temporary list depending on whether they
3652 * were swapped above or not.
3653 */
3654 for (view = ISC_LIST_HEAD(viewlist);
3655 view != NULL;
3656 view = view_next) {
3657 view_next = ISC_LIST_NEXT(view, link);
3658 ISC_LIST_UNLINK(viewlist, view, link);
3659 if (result == ISC_R_SUCCESS &&
3660 strcmp(view->name, "_bind") != 0)
3661 (void)dns_zt_apply(view->zonetable, ISC_FALSE,
3662 removed, view);
3663 dns_view_detach(&view);
3664 }
3665
3666 /*
3667 * Adjust the listening interfaces in accordance with the source
3668 * addresses specified in views and zones.
3669 */
3670 if (isc_net_probeipv6() == ISC_R_SUCCESS)
3671 adjust_interfaces(server, ns_g_mctx);
3672
3673 /* Relinquish exclusive access to configuration data. */
3674 isc_task_endexclusive(server->task);
3675
3676 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3677 ISC_LOG_DEBUG(1), "load_configuration: %s",
3678 isc_result_totext(result));
3679
3680 return (result);
3681 }
3682
3683 static isc_result_t
3684 load_zones(ns_server_t *server, isc_boolean_t stop) {
3685 isc_result_t result;
3686 dns_view_t *view;
3687
3688 result = isc_task_beginexclusive(server->task);
3689 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3690
3691 /*
3692 * Load zone data from disk.
3693 */
3694 for (view = ISC_LIST_HEAD(server->viewlist);
3695 view != NULL;
3696 view = ISC_LIST_NEXT(view, link))
3697 {
3698 CHECK(dns_view_load(view, stop));
3699 }
3700
3701 /*
3702 * Force zone maintenance. Do this after loading
3703 * so that we know when we need to force AXFR of
3704 * slave zones whose master files are missing.
3705 */
3706 CHECK(dns_zonemgr_forcemaint(server->zonemgr));
3707 cleanup:
3708 isc_task_endexclusive(server->task);
3709 return (result);
3710 }
3711
3712 static isc_result_t
3713 load_new_zones(ns_server_t *server, isc_boolean_t stop) {
3714 isc_result_t result;
3715 dns_view_t *view;
3716
3717 result = isc_task_beginexclusive(server->task);
3718 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3719
3720 /*
3721 * Load zone data from disk.
3722 */
3723 for (view = ISC_LIST_HEAD(server->viewlist);
3724 view != NULL;
3725 view = ISC_LIST_NEXT(view, link))
3726 {
3727 CHECK(dns_view_loadnew(view, stop));
3728 }
3729 /*
3730 * Force zone maintenance. Do this after loading
3731 * so that we know when we need to force AXFR of
3732 * slave zones whose master files are missing.
3733 */
3734 dns_zonemgr_resumexfrs(server->zonemgr);
3735 cleanup:
3736 isc_task_endexclusive(server->task);
3737 return (result);
3738 }
3739
3740 static void
3741 run_server(isc_task_t *task, isc_event_t *event) {
3742 isc_result_t result;
3743 ns_server_t *server = (ns_server_t *)event->ev_arg;
3744
3745 INSIST(task == server->task);
3746
3747 isc_event_free(&event);
3748
3749 CHECKFATAL(dns_dispatchmgr_create(ns_g_mctx, ns_g_entropy,
3750 &ns_g_dispatchmgr),
3751 "creating dispatch manager");
3752
3753 dns_dispatchmgr_setstats(ns_g_dispatchmgr, server->resolverstats);
3754
3755 CHECKFATAL(ns_interfacemgr_create(ns_g_mctx, ns_g_taskmgr,
3756 ns_g_socketmgr, ns_g_dispatchmgr,
3757 &server->interfacemgr),
3758 "creating interface manager");
3759
3760 CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
3761 NULL, NULL, server->task,
3762 interface_timer_tick,
3763 server, &server->interface_timer),
3764 "creating interface timer");
3765
3766 CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
3767 NULL, NULL, server->task,
3768 heartbeat_timer_tick,
3769 server, &server->heartbeat_timer),
3770 "creating heartbeat timer");
3771
3772 CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
3773 NULL, NULL, server->task, pps_timer_tick,
3774 server, &server->pps_timer),
3775 "creating pps timer");
3776
3777 CHECKFATAL(cfg_parser_create(ns_g_mctx, NULL, &ns_g_parser),
3778 "creating default configuration parser");
3779
3780 if (ns_g_lwresdonly)
3781 CHECKFATAL(load_configuration(lwresd_g_conffile, server,
3782 ISC_TRUE),
3783 "loading configuration");
3784 else
3785 CHECKFATAL(load_configuration(ns_g_conffile, server, ISC_TRUE),
3786 "loading configuration");
3787
3788 isc_hash_init();
3789
3790 CHECKFATAL(load_zones(server, ISC_FALSE), "loading zones");
3791
3792 ns_os_started();
3793 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3794 ISC_LOG_NOTICE, "running");
3795 }
3796
3797 void
3798 ns_server_flushonshutdown(ns_server_t *server, isc_boolean_t flush) {
3799
3800 REQUIRE(NS_SERVER_VALID(server));
3801
3802 server->flushonshutdown = flush;
3803 }
3804
3805 static void
3806 shutdown_server(isc_task_t *task, isc_event_t *event) {
3807 isc_result_t result;
3808 dns_view_t *view, *view_next;
3809 ns_server_t *server = (ns_server_t *)event->ev_arg;
3810 isc_boolean_t flush = server->flushonshutdown;
3811
3812 UNUSED(task);
3813 INSIST(task == server->task);
3814
3815 result = isc_task_beginexclusive(server->task);
3816 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3817
3818 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3819 ISC_LOG_INFO, "shutting down%s",
3820 flush ? ": flushing changes" : "");
3821
3822 ns_statschannels_shutdown(server);
3823 ns_controls_shutdown(server->controls);
3824 end_reserved_dispatches(server, ISC_TRUE);
3825
3826 cfg_obj_destroy(ns_g_parser, &ns_g_config);
3827 cfg_parser_destroy(&ns_g_parser);
3828
3829 for (view = ISC_LIST_HEAD(server->viewlist);
3830 view != NULL;
3831 view = view_next) {
3832 view_next = ISC_LIST_NEXT(view, link);
3833 ISC_LIST_UNLINK(server->viewlist, view, link);
3834 if (flush)
3835 dns_view_flushanddetach(&view);
3836 else
3837 dns_view_detach(&view);
3838 }
3839
3840 isc_timer_detach(&server->interface_timer);
3841 isc_timer_detach(&server->heartbeat_timer);
3842 isc_timer_detach(&server->pps_timer);
3843
3844 ns_interfacemgr_shutdown(server->interfacemgr);
3845 ns_interfacemgr_detach(&server->interfacemgr);
3846
3847 dns_dispatchmgr_destroy(&ns_g_dispatchmgr);
3848
3849 dns_zonemgr_shutdown(server->zonemgr);
3850
3851 if (server->blackholeacl != NULL)
3852 dns_acl_detach(&server->blackholeacl);
3853
3854 dns_db_detach(&server->in_roothints);
3855
3856 isc_task_endexclusive(server->task);
3857
3858 isc_task_detach(&server->task);
3859
3860 isc_event_free(&event);
3861 }
3862
3863 void
3864 ns_server_create(isc_mem_t *mctx, ns_server_t **serverp) {
3865 isc_result_t result;
3866
3867 ns_server_t *server = isc_mem_get(mctx, sizeof(*server));
3868 if (server == NULL)
3869 fatal("allocating server object", ISC_R_NOMEMORY);
3870
3871 server->mctx = mctx;
3872 server->task = NULL;
3873
3874 /* Initialize configuration data with default values. */
3875
3876 result = isc_quota_init(&server->xfroutquota, 10);
3877 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3878 result = isc_quota_init(&server->tcpquota, 10);
3879 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3880 result = isc_quota_init(&server->recursionquota, 100);
3881 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3882
3883 result = dns_aclenv_init(mctx, &server->aclenv);
3884 RUNTIME_CHECK(result == ISC_R_SUCCESS);
3885
3886 /* Initialize server data structures. */
3887 server->zonemgr = NULL;
3888 server->interfacemgr = NULL;
3889 ISC_LIST_INIT(server->viewlist);
3890 server->in_roothints = NULL;
3891 server->blackholeacl = NULL;
3892
3893 CHECKFATAL(dns_rootns_create(mctx, dns_rdataclass_in, NULL,
3894 &server->in_roothints),
3895 "setting up root hints");
3896
3897 CHECKFATAL(isc_mutex_init(&server->reload_event_lock),
3898 "initializing reload event lock");
3899 server->reload_event =
3900 isc_event_allocate(ns_g_mctx, server,
3901 NS_EVENT_RELOAD,
3902 ns_server_reload,
3903 server,
3904 sizeof(isc_event_t));
3905 CHECKFATAL(server->reload_event == NULL ?
3906 ISC_R_NOMEMORY : ISC_R_SUCCESS,
3907 "allocating reload event");
3908
3909 CHECKFATAL(dst_lib_init(ns_g_mctx, ns_g_entropy, ISC_ENTROPY_GOODONLY),
3910 "initializing DST");
3911
3912 server->tkeyctx = NULL;
3913 CHECKFATAL(dns_tkeyctx_create(ns_g_mctx, ns_g_entropy,
3914 &server->tkeyctx),
3915 "creating TKEY context");
3916
3917 /*
3918 * Setup the server task, which is responsible for coordinating
3919 * startup and shutdown of the server.
3920 */
3921 CHECKFATAL(isc_task_create(ns_g_taskmgr, 0, &server->task),
3922 "creating server task");
3923 isc_task_setname(server->task, "server", server);
3924 CHECKFATAL(isc_task_onshutdown(server->task, shutdown_server, server),
3925 "isc_task_onshutdown");
3926 CHECKFATAL(isc_app_onrun(ns_g_mctx, server->task, run_server, server),
3927 "isc_app_onrun");
3928
3929 server->interface_timer = NULL;
3930 server->heartbeat_timer = NULL;
3931 server->pps_timer = NULL;
3932
3933 server->interface_interval = 0;
3934 server->heartbeat_interval = 0;
3935
3936 CHECKFATAL(dns_zonemgr_create(ns_g_mctx, ns_g_taskmgr, ns_g_timermgr,
3937 ns_g_socketmgr, &server->zonemgr),
3938 "dns_zonemgr_create");
3939
3940 server->statsfile = isc_mem_strdup(server->mctx, "named.stats");
3941 CHECKFATAL(server->statsfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
3942 "isc_mem_strdup");
3943 server->nsstats = NULL;
3944 server->rcvquerystats = NULL;
3945 server->opcodestats = NULL;
3946 server->zonestats = NULL;
3947 server->resolverstats = NULL;
3948 server->sockstats = NULL;
3949 CHECKFATAL(isc_stats_create(server->mctx, &server->sockstats,
3950 isc_sockstatscounter_max),
3951 "isc_stats_create");
3952 isc_socketmgr_setstats(ns_g_socketmgr, server->sockstats);
3953
3954 server->dumpfile = isc_mem_strdup(server->mctx, "named_dump.db");
3955 CHECKFATAL(server->dumpfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
3956 "isc_mem_strdup");
3957
3958 server->recfile = isc_mem_strdup(server->mctx, "named.recursing");
3959 CHECKFATAL(server->recfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
3960 "isc_mem_strdup");
3961
3962 server->hostname_set = ISC_FALSE;
3963 server->hostname = NULL;
3964 server->version_set = ISC_FALSE;
3965 server->version = NULL;
3966 server->server_usehostname = ISC_FALSE;
3967 server->server_id = NULL;
3968
3969 CHECKFATAL(isc_stats_create(ns_g_mctx, &server->nsstats,
3970 dns_nsstatscounter_max),
3971 "dns_stats_create (server)");
3972
3973 CHECKFATAL(dns_rdatatypestats_create(ns_g_mctx,
3974 &server->rcvquerystats),
3975 "dns_stats_create (rcvquery)");
3976
3977 CHECKFATAL(dns_opcodestats_create(ns_g_mctx, &server->opcodestats),
3978 "dns_stats_create (opcode)");
3979
3980 CHECKFATAL(isc_stats_create(ns_g_mctx, &server->zonestats,
3981 dns_zonestatscounter_max),
3982 "dns_stats_create (zone)");
3983
3984 CHECKFATAL(isc_stats_create(ns_g_mctx, &server->resolverstats,
3985 dns_resstatscounter_max),
3986 "dns_stats_create (resolver)");
3987
3988 server->flushonshutdown = ISC_FALSE;
3989 server->log_queries = ISC_FALSE;
3990
3991 server->controls = NULL;
3992 CHECKFATAL(ns_controls_create(server, &server->controls),
3993 "ns_controls_create");
3994 server->dispatchgen = 0;
3995 ISC_LIST_INIT(server->dispatches);
3996
3997 ISC_LIST_INIT(server->statschannels);
3998
3999 server->magic = NS_SERVER_MAGIC;
4000 *serverp = server;
4001 }
4002
4003 void
4004 ns_server_destroy(ns_server_t **serverp) {
4005 ns_server_t *server = *serverp;
4006 REQUIRE(NS_SERVER_VALID(server));
4007
4008 ns_controls_destroy(&server->controls);
4009
4010 isc_stats_detach(&server->nsstats);
4011 dns_stats_detach(&server->rcvquerystats);
4012 dns_stats_detach(&server->opcodestats);
4013 isc_stats_detach(&server->zonestats);
4014 isc_stats_detach(&server->resolverstats);
4015 isc_stats_detach(&server->sockstats);
4016
4017 isc_mem_free(server->mctx, server->statsfile);
4018 isc_mem_free(server->mctx, server->dumpfile);
4019 isc_mem_free(server->mctx, server->recfile);
4020
4021 if (server->version != NULL)
4022 isc_mem_free(server->mctx, server->version);
4023 if (server->hostname != NULL)
4024 isc_mem_free(server->mctx, server->hostname);
4025 if (server->server_id != NULL)
4026 isc_mem_free(server->mctx, server->server_id);
4027
4028 dns_zonemgr_detach(&server->zonemgr);
4029
4030 if (server->tkeyctx != NULL)
4031 dns_tkeyctx_destroy(&server->tkeyctx);
4032
4033 dst_lib_destroy();
4034
4035 isc_event_free(&server->reload_event);
4036
4037 INSIST(ISC_LIST_EMPTY(server->viewlist));
4038
4039 dns_aclenv_destroy(&server->aclenv);
4040
4041 isc_quota_destroy(&server->recursionquota);
4042 isc_quota_destroy(&server->tcpquota);
4043 isc_quota_destroy(&server->xfroutquota);
4044
4045 server->magic = 0;
4046 isc_mem_put(server->mctx, server, sizeof(*server));
4047 *serverp = NULL;
4048 }
4049
4050 static void
4051 fatal(const char *msg, isc_result_t result) {
4052 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
4053 ISC_LOG_CRITICAL, "%s: %s", msg,
4054 isc_result_totext(result));
4055 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
4056 ISC_LOG_CRITICAL, "exiting (due to fatal error)");
4057 exit(1);
4058 }
4059
4060 static void
4061 start_reserved_dispatches(ns_server_t *server) {
4062
4063 REQUIRE(NS_SERVER_VALID(server));
4064
4065 server->dispatchgen++;
4066 }
4067
4068 static void
4069 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all) {
4070 ns_dispatch_t *dispatch, *nextdispatch;
4071
4072 REQUIRE(NS_SERVER_VALID(server));
4073
4074 for (dispatch = ISC_LIST_HEAD(server->dispatches);
4075 dispatch != NULL;
4076 dispatch = nextdispatch) {
4077 nextdispatch = ISC_LIST_NEXT(dispatch, link);
4078 if (!all && server->dispatchgen == dispatch-> dispatchgen)
4079 continue;
4080 ISC_LIST_UNLINK(server->dispatches, dispatch, link);
4081 dns_dispatch_detach(&dispatch->dispatch);
4082 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
4083 }
4084 }
4085
4086 void
4087 ns_add_reserved_dispatch(ns_server_t *server, const isc_sockaddr_t *addr) {
4088 ns_dispatch_t *dispatch;
4089 in_port_t port;
4090 char addrbuf[ISC_SOCKADDR_FORMATSIZE];
4091 isc_result_t result;
4092 unsigned int attrs, attrmask;
4093
4094 REQUIRE(NS_SERVER_VALID(server));
4095
4096 port = isc_sockaddr_getport(addr);
4097 if (port == 0 || port >= 1024)
4098 return;
4099
4100 for (dispatch = ISC_LIST_HEAD(server->dispatches);
4101 dispatch != NULL;
4102 dispatch = ISC_LIST_NEXT(dispatch, link)) {
4103 if (isc_sockaddr_equal(&dispatch->addr, addr))
4104 break;
4105 }
4106 if (dispatch != NULL) {
4107 dispatch->dispatchgen = server->dispatchgen;
4108 return;
4109 }
4110
4111 dispatch = isc_mem_get(server->mctx, sizeof(*dispatch));
4112 if (dispatch == NULL) {
4113 result = ISC_R_NOMEMORY;
4114 goto cleanup;
4115 }
4116
4117 dispatch->addr = *addr;
4118 dispatch->dispatchgen = server->dispatchgen;
4119 dispatch->dispatch = NULL;
4120
4121 attrs = 0;
4122 attrs |= DNS_DISPATCHATTR_UDP;
4123 switch (isc_sockaddr_pf(addr)) {
4124 case AF_INET:
4125 attrs |= DNS_DISPATCHATTR_IPV4;
4126 break;
4127 case AF_INET6:
4128 attrs |= DNS_DISPATCHATTR_IPV6;
4129 break;
4130 default:
4131 result = ISC_R_NOTIMPLEMENTED;
4132 goto cleanup;
4133 }
4134 attrmask = 0;
4135 attrmask |= DNS_DISPATCHATTR_UDP;
4136 attrmask |= DNS_DISPATCHATTR_TCP;
4137 attrmask |= DNS_DISPATCHATTR_IPV4;
4138 attrmask |= DNS_DISPATCHATTR_IPV6;
4139
4140 result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
4141 ns_g_taskmgr, &dispatch->addr, 4096,
4142 1000, 32768, 16411, 16433,
4143 attrs, attrmask, &dispatch->dispatch);
4144 if (result != ISC_R_SUCCESS)
4145 goto cleanup;
4146
4147 ISC_LIST_INITANDPREPEND(server->dispatches, dispatch, link);
4148
4149 return;
4150
4151 cleanup:
4152 if (dispatch != NULL)
4153 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
4154 isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf));
4155 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4156 NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
4157 "unable to create dispatch for reserved port %s: %s",
4158 addrbuf, isc_result_totext(result));
4159 }
4160
4161
4162 static isc_result_t
4163 loadconfig(ns_server_t *server) {
4164 isc_result_t result;
4165 start_reserved_dispatches(server);
4166 result = load_configuration(ns_g_lwresdonly ?
4167 lwresd_g_conffile : ns_g_conffile,
4168 server, ISC_FALSE);
4169 if (result == ISC_R_SUCCESS) {
4170 end_reserved_dispatches(server, ISC_FALSE);
4171 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4172 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4173 "reloading configuration succeeded");
4174 } else {
4175 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4176 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4177 "reloading configuration failed: %s",
4178 isc_result_totext(result));
4179 }
4180 return (result);
4181 }
4182
4183 static isc_result_t
4184 reload(ns_server_t *server) {
4185 isc_result_t result;
4186 CHECK(loadconfig(server));
4187
4188 result = load_zones(server, ISC_FALSE);
4189 if (result == ISC_R_SUCCESS)
4190 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4191 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4192 "reloading zones succeeded");
4193 else
4194 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4195 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4196 "reloading zones failed: %s",
4197 isc_result_totext(result));
4198
4199 cleanup:
4200 return (result);
4201 }
4202
4203 static void
4204 reconfig(ns_server_t *server) {
4205 isc_result_t result;
4206 CHECK(loadconfig(server));
4207
4208 result = load_new_zones(server, ISC_FALSE);
4209 if (result == ISC_R_SUCCESS)
4210 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4211 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4212 "any newly configured zones are now loaded");
4213 else
4214 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4215 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4216 "loading new zones failed: %s",
4217 isc_result_totext(result));
4218
4219 cleanup: ;
4220 }
4221
4222 /*
4223 * Handle a reload event (from SIGHUP).
4224 */
4225 static void
4226 ns_server_reload(isc_task_t *task, isc_event_t *event) {
4227 ns_server_t *server = (ns_server_t *)event->ev_arg;
4228
4229 INSIST(task = server->task);
4230 UNUSED(task);
4231
4232 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4233 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4234 "received SIGHUP signal to reload zones");
4235 (void)reload(server);
4236
4237 LOCK(&server->reload_event_lock);
4238 INSIST(server->reload_event == NULL);
4239 server->reload_event = event;
4240 UNLOCK(&server->reload_event_lock);
4241 }
4242
4243 void
4244 ns_server_reloadwanted(ns_server_t *server) {
4245 LOCK(&server->reload_event_lock);
4246 if (server->reload_event != NULL)
4247 isc_task_send(server->task, &server->reload_event);
4248 UNLOCK(&server->reload_event_lock);
4249 }
4250
4251 static char *
4252 next_token(char **stringp, const char *delim) {
4253 char *res;
4254
4255 do {
4256 res = strsep(stringp, delim);
4257 if (res == NULL)
4258 break;
4259 } while (*res == '\0');
4260 return (res);
4261 }
4262
4263 /*
4264 * Find the zone specified in the control channel command 'args',
4265 * if any. If a zone is specified, point '*zonep' at it, otherwise
4266 * set '*zonep' to NULL.
4267 */
4268 static isc_result_t
4269 zone_from_args(ns_server_t *server, char *args, dns_zone_t **zonep) {
4270 char *input, *ptr;
4271 const char *zonetxt;
4272 char *classtxt;
4273 const char *viewtxt = NULL;
4274 dns_fixedname_t name;
4275 isc_result_t result;
4276 isc_buffer_t buf;
4277 dns_view_t *view = NULL;
4278 dns_rdataclass_t rdclass;
4279
4280 REQUIRE(zonep != NULL && *zonep == NULL);
4281
4282 input = args;
4283
4284 /* Skip the command name. */
4285 ptr = next_token(&input, " \t");
4286 if (ptr == NULL)
4287 return (ISC_R_UNEXPECTEDEND);
4288
4289 /* Look for the zone name. */
4290 zonetxt = next_token(&input, " \t");
4291 if (zonetxt == NULL)
4292 return (ISC_R_SUCCESS);
4293
4294 /* Look for the optional class name. */
4295 classtxt = next_token(&input, " \t");
4296 if (classtxt != NULL) {
4297 /* Look for the optional view name. */
4298 viewtxt = next_token(&input, " \t");
4299 }
4300
4301 isc_buffer_init(&buf, zonetxt, strlen(zonetxt));
4302 isc_buffer_add(&buf, strlen(zonetxt));
4303 dns_fixedname_init(&name);
4304 result = dns_name_fromtext(dns_fixedname_name(&name),
4305 &buf, dns_rootname, ISC_FALSE, NULL);
4306 if (result != ISC_R_SUCCESS)
4307 goto fail1;
4308
4309 if (classtxt != NULL) {
4310 isc_textregion_t r;
4311 r.base = classtxt;
4312 r.length = strlen(classtxt);
4313 result = dns_rdataclass_fromtext(&rdclass, &r);
4314 if (result != ISC_R_SUCCESS)
4315 goto fail1;
4316 } else
4317 rdclass = dns_rdataclass_in;
4318
4319 if (viewtxt == NULL) {
4320 result = dns_viewlist_findzone(&server->viewlist,
4321 dns_fixedname_name(&name),
4322 ISC_TF(classtxt == NULL),
4323 rdclass, zonep);
4324 } else {
4325 result = dns_viewlist_find(&server->viewlist, viewtxt,
4326 rdclass, &view);
4327 if (result != ISC_R_SUCCESS)
4328 goto fail1;
4329
4330 result = dns_zt_find(view->zonetable, dns_fixedname_name(&name),
4331 0, NULL, zonep);
4332 dns_view_detach(&view);
4333 }
4334
4335 /* Partial match? */
4336 if (result != ISC_R_SUCCESS && *zonep != NULL)
4337 dns_zone_detach(zonep);
4338 fail1:
4339 return (result);
4340 }
4341
4342 /*
4343 * Act on a "retransfer" command from the command channel.
4344 */
4345 isc_result_t
4346 ns_server_retransfercommand(ns_server_t *server, char *args) {
4347 isc_result_t result;
4348 dns_zone_t *zone = NULL;
4349 dns_zonetype_t type;
4350
4351 result = zone_from_args(server, args, &zone);
4352 if (result != ISC_R_SUCCESS)
4353 return (result);
4354 if (zone == NULL)
4355 return (ISC_R_UNEXPECTEDEND);
4356 type = dns_zone_gettype(zone);
4357 if (type == dns_zone_slave || type == dns_zone_stub)
4358 dns_zone_forcereload(zone);
4359 else
4360 result = ISC_R_NOTFOUND;
4361 dns_zone_detach(&zone);
4362 return (result);
4363 }
4364
4365 /*
4366 * Act on a "reload" command from the command channel.
4367 */
4368 isc_result_t
4369 ns_server_reloadcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
4370 isc_result_t result;
4371 dns_zone_t *zone = NULL;
4372 dns_zonetype_t type;
4373 const char *msg = NULL;
4374
4375 result = zone_from_args(server, args, &zone);
4376 if (result != ISC_R_SUCCESS)
4377 return (result);
4378 if (zone == NULL) {
4379 result = reload(server);
4380 if (result == ISC_R_SUCCESS)
4381 msg = "server reload successful";
4382 } else {
4383 type = dns_zone_gettype(zone);
4384 if (type == dns_zone_slave || type == dns_zone_stub) {
4385 dns_zone_refresh(zone);
4386 dns_zone_detach(&zone);
4387 msg = "zone refresh queued";
4388 } else {
4389 result = dns_zone_load(zone);
4390 dns_zone_detach(&zone);
4391 switch (result) {
4392 case ISC_R_SUCCESS:
4393 msg = "zone reload successful";
4394 break;
4395 case DNS_R_CONTINUE:
4396 msg = "zone reload queued";
4397 result = ISC_R_SUCCESS;
4398 break;
4399 case DNS_R_UPTODATE:
4400 msg = "zone reload up-to-date";
4401 result = ISC_R_SUCCESS;
4402 break;
4403 default:
4404 /* failure message will be generated by rndc */
4405 break;
4406 }
4407 }
4408 }
4409 if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
4410 isc_buffer_putmem(text, (const unsigned char *)msg,
4411 strlen(msg) + 1);
4412 return (result);
4413 }
4414
4415 /*
4416 * Act on a "reconfig" command from the command channel.
4417 */
4418 isc_result_t
4419 ns_server_reconfigcommand(ns_server_t *server, char *args) {
4420 UNUSED(args);
4421
4422 reconfig(server);
4423 return (ISC_R_SUCCESS);
4424 }
4425
4426 /*
4427 * Act on a "notify" command from the command channel.
4428 */
4429 isc_result_t
4430 ns_server_notifycommand(ns_server_t *server, char *args, isc_buffer_t *text) {
4431 isc_result_t result;
4432 dns_zone_t *zone = NULL;
4433 const unsigned char msg[] = "zone notify queued";
4434
4435 result = zone_from_args(server, args, &zone);
4436 if (result != ISC_R_SUCCESS)
4437 return (result);
4438 if (zone == NULL)
4439 return (ISC_R_UNEXPECTEDEND);
4440
4441 dns_zone_notify(zone);
4442 dns_zone_detach(&zone);
4443 if (sizeof(msg) <= isc_buffer_availablelength(text))
4444 isc_buffer_putmem(text, msg, sizeof(msg));
4445
4446 return (ISC_R_SUCCESS);
4447 }
4448
4449 /*
4450 * Act on a "refresh" command from the command channel.
4451 */
4452 isc_result_t
4453 ns_server_refreshcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
4454 isc_result_t result;
4455 dns_zone_t *zone = NULL;
4456 const unsigned char msg1[] = "zone refresh queued";
4457 const unsigned char msg2[] = "not a slave or stub zone";
4458 dns_zonetype_t type;
4459
4460 result = zone_from_args(server, args, &zone);
4461 if (result != ISC_R_SUCCESS)
4462 return (result);
4463 if (zone == NULL)
4464 return (ISC_R_UNEXPECTEDEND);
4465
4466 type = dns_zone_gettype(zone);
4467 if (type == dns_zone_slave || type == dns_zone_stub) {
4468 dns_zone_refresh(zone);
4469 dns_zone_detach(&zone);
4470 if (sizeof(msg1) <= isc_buffer_availablelength(text))
4471 isc_buffer_putmem(text, msg1, sizeof(msg1));
4472 return (ISC_R_SUCCESS);
4473 }
4474
4475 dns_zone_detach(&zone);
4476 if (sizeof(msg2) <= isc_buffer_availablelength(text))
4477 isc_buffer_putmem(text, msg2, sizeof(msg2));
4478 return (ISC_R_FAILURE);
4479 }
4480
4481 isc_result_t
4482 ns_server_togglequerylog(ns_server_t *server) {
4483 server->log_queries = server->log_queries ? ISC_FALSE : ISC_TRUE;
4484
4485 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4486 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4487 "query logging is now %s",
4488 server->log_queries ? "on" : "off");
4489 return (ISC_R_SUCCESS);
4490 }
4491
4492 static isc_result_t
4493 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
4494 cfg_aclconfctx_t *actx,
4495 isc_mem_t *mctx, ns_listenlist_t **target)
4496 {
4497 isc_result_t result;
4498 const cfg_listelt_t *element;
4499 ns_listenlist_t *dlist = NULL;
4500
4501 REQUIRE(target != NULL && *target == NULL);
4502
4503 result = ns_listenlist_create(mctx, &dlist);
4504 if (result != ISC_R_SUCCESS)
4505 return (result);
4506
4507 for (element = cfg_list_first(listenlist);
4508 element != NULL;
4509 element = cfg_list_next(element))
4510 {
4511 ns_listenelt_t *delt = NULL;
4512 const cfg_obj_t *listener = cfg_listelt_value(element);
4513 result = ns_listenelt_fromconfig(listener, config, actx,
4514 mctx, &delt);
4515 if (result != ISC_R_SUCCESS)
4516 goto cleanup;
4517 ISC_LIST_APPEND(dlist->elts, delt, link);
4518 }
4519 *target = dlist;
4520 return (ISC_R_SUCCESS);
4521
4522 cleanup:
4523 ns_listenlist_detach(&dlist);
4524 return (result);
4525 }
4526
4527 /*
4528 * Create a listen list from the corresponding configuration
4529 * data structure.
4530 */
4531 static isc_result_t
4532 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
4533 cfg_aclconfctx_t *actx,
4534 isc_mem_t *mctx, ns_listenelt_t **target)
4535 {
4536 isc_result_t result;
4537 const cfg_obj_t *portobj;
4538 in_port_t port;
4539 ns_listenelt_t *delt = NULL;
4540 REQUIRE(target != NULL && *target == NULL);
4541
4542 portobj = cfg_tuple_get(listener, "port");
4543 if (!cfg_obj_isuint32(portobj)) {
4544 if (ns_g_port != 0) {
4545 port = ns_g_port;
4546 } else {
4547 result = ns_config_getport(config, &port);
4548 if (result != ISC_R_SUCCESS)
4549 return (result);
4550 }
4551 } else {
4552 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
4553 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
4554 "port value '%u' is out of range",
4555 cfg_obj_asuint32(portobj));
4556 return (ISC_R_RANGE);
4557 }
4558 port = (in_port_t)cfg_obj_asuint32(portobj);
4559 }
4560
4561 result = ns_listenelt_create(mctx, port, NULL, &delt);
4562 if (result != ISC_R_SUCCESS)
4563 return (result);
4564
4565 result = cfg_acl_fromconfig(cfg_tuple_get(listener, "acl"),
4566 config, ns_g_lctx, actx, mctx, 0,
4567 &delt->acl);
4568 if (result != ISC_R_SUCCESS) {
4569 ns_listenelt_destroy(delt);
4570 return (result);
4571 }
4572 *target = delt;
4573 return (ISC_R_SUCCESS);
4574 }
4575
4576 isc_result_t
4577 ns_server_dumpstats(ns_server_t *server) {
4578 isc_result_t result;
4579 FILE *fp = NULL;
4580
4581 CHECKMF(isc_stdio_open(server->statsfile, "a", &fp),
4582 "could not open statistics dump file", server->statsfile);
4583
4584 result = ns_stats_dump(server, fp);
4585 CHECK(result);
4586
4587 cleanup:
4588 if (fp != NULL)
4589 (void)isc_stdio_close(fp);
4590 if (result == ISC_R_SUCCESS)
4591 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4592 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4593 "dumpstats complete");
4594 else
4595 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4596 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4597 "dumpstats failed: %s",
4598 dns_result_totext(result));
4599 return (result);
4600 }
4601
4602 static isc_result_t
4603 add_zone_tolist(dns_zone_t *zone, void *uap) {
4604 struct dumpcontext *dctx = uap;
4605 struct zonelistentry *zle;
4606
4607 zle = isc_mem_get(dctx->mctx, sizeof *zle);
4608 if (zle == NULL)
4609 return (ISC_R_NOMEMORY);
4610 zle->zone = NULL;
4611 dns_zone_attach(zone, &zle->zone);
4612 ISC_LINK_INIT(zle, link);
4613 ISC_LIST_APPEND(ISC_LIST_TAIL(dctx->viewlist)->zonelist, zle, link);
4614 return (ISC_R_SUCCESS);
4615 }
4616
4617 static isc_result_t
4618 add_view_tolist(struct dumpcontext *dctx, dns_view_t *view) {
4619 struct viewlistentry *vle;
4620 isc_result_t result = ISC_R_SUCCESS;
4621
4622 /*
4623 * Prevent duplicate views.
4624 */
4625 for (vle = ISC_LIST_HEAD(dctx->viewlist);
4626 vle != NULL;
4627 vle = ISC_LIST_NEXT(vle, link))
4628 if (vle->view == view)
4629 return (ISC_R_SUCCESS);
4630
4631 vle = isc_mem_get(dctx->mctx, sizeof *vle);
4632 if (vle == NULL)
4633 return (ISC_R_NOMEMORY);
4634 vle->view = NULL;
4635 dns_view_attach(view, &vle->view);
4636 ISC_LINK_INIT(vle, link);
4637 ISC_LIST_INIT(vle->zonelist);
4638 ISC_LIST_APPEND(dctx->viewlist, vle, link);
4639 if (dctx->dumpzones)
4640 result = dns_zt_apply(view->zonetable, ISC_TRUE,
4641 add_zone_tolist, dctx);
4642 return (result);
4643 }
4644
4645 static void
4646 dumpcontext_destroy(struct dumpcontext *dctx) {
4647 struct viewlistentry *vle;
4648 struct zonelistentry *zle;
4649
4650 vle = ISC_LIST_HEAD(dctx->viewlist);
4651 while (vle != NULL) {
4652 ISC_LIST_UNLINK(dctx->viewlist, vle, link);
4653 zle = ISC_LIST_HEAD(vle->zonelist);
4654 while (zle != NULL) {
4655 ISC_LIST_UNLINK(vle->zonelist, zle, link);
4656 dns_zone_detach(&zle->zone);
4657 isc_mem_put(dctx->mctx, zle, sizeof *zle);
4658 zle = ISC_LIST_HEAD(vle->zonelist);
4659 }
4660 dns_view_detach(&vle->view);
4661 isc_mem_put(dctx->mctx, vle, sizeof *vle);
4662 vle = ISC_LIST_HEAD(dctx->viewlist);
4663 }
4664 if (dctx->version != NULL)
4665 dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE);
4666 if (dctx->db != NULL)
4667 dns_db_detach(&dctx->db);
4668 if (dctx->cache != NULL)
4669 dns_db_detach(&dctx->cache);
4670 if (dctx->task != NULL)
4671 isc_task_detach(&dctx->task);
4672 if (dctx->fp != NULL)
4673 (void)isc_stdio_close(dctx->fp);
4674 if (dctx->mdctx != NULL)
4675 dns_dumpctx_detach(&dctx->mdctx);
4676 isc_mem_put(dctx->mctx, dctx, sizeof *dctx);
4677 }
4678
4679 static void
4680 dumpdone(void *arg, isc_result_t result) {
4681 struct dumpcontext *dctx = arg;
4682 char buf[1024+32];
4683 const dns_master_style_t *style;
4684
4685 if (result != ISC_R_SUCCESS)
4686 goto cleanup;
4687 if (dctx->mdctx != NULL)
4688 dns_dumpctx_detach(&dctx->mdctx);
4689 if (dctx->view == NULL) {
4690 dctx->view = ISC_LIST_HEAD(dctx->viewlist);
4691 if (dctx->view == NULL)
4692 goto done;
4693 INSIST(dctx->zone == NULL);
4694 } else
4695 goto resume;
4696 nextview:
4697 fprintf(dctx->fp, ";\n; Start view %s\n;\n", dctx->view->view->name);
4698 resume:
4699 if (dctx->zone == NULL && dctx->cache == NULL && dctx->dumpcache) {
4700 style = &dns_master_style_cache;
4701 /* start cache dump */
4702 if (dctx->view->view->cachedb != NULL)
4703 dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
4704 if (dctx->cache != NULL) {
4705
4706 fprintf(dctx->fp, ";\n; Cache dump of view '%s'\n;\n",
4707 dctx->view->view->name);
4708 result = dns_master_dumptostreaminc(dctx->mctx,
4709 dctx->cache, NULL,
4710 style, dctx->fp,
4711 dctx->task,
4712 dumpdone, dctx,
4713 &dctx->mdctx);
4714 if (result == DNS_R_CONTINUE)
4715 return;
4716 if (result == ISC_R_NOTIMPLEMENTED)
4717 fprintf(dctx->fp, "; %s\n",
4718 dns_result_totext(result));
4719 else if (result != ISC_R_SUCCESS)
4720 goto cleanup;
4721 }
4722 }
4723 if (dctx->cache != NULL) {
4724 dns_adb_dump(dctx->view->view->adb, dctx->fp);
4725 dns_resolver_printbadcache(dctx->view->view->resolver,
4726 dctx->fp);
4727 dns_db_detach(&dctx->cache);
4728 }
4729 if (dctx->dumpzones) {
4730 style = &dns_master_style_full;
4731 nextzone:
4732 if (dctx->version != NULL)
4733 dns_db_closeversion(dctx->db, &dctx->version,
4734 ISC_FALSE);
4735 if (dctx->db != NULL)
4736 dns_db_detach(&dctx->db);
4737 if (dctx->zone == NULL)
4738 dctx->zone = ISC_LIST_HEAD(dctx->view->zonelist);
4739 else
4740 dctx->zone = ISC_LIST_NEXT(dctx->zone, link);
4741 if (dctx->zone != NULL) {
4742 /* start zone dump */
4743 dns_zone_name(dctx->zone->zone, buf, sizeof(buf));
4744 fprintf(dctx->fp, ";\n; Zone dump of '%s'\n;\n", buf);
4745 result = dns_zone_getdb(dctx->zone->zone, &dctx->db);
4746 if (result != ISC_R_SUCCESS) {
4747 fprintf(dctx->fp, "; %s\n",
4748 dns_result_totext(result));
4749 goto nextzone;
4750 }
4751 dns_db_currentversion(dctx->db, &dctx->version);
4752 result = dns_master_dumptostreaminc(dctx->mctx,
4753 dctx->db,
4754 dctx->version,
4755 style, dctx->fp,
4756 dctx->task,
4757 dumpdone, dctx,
4758 &dctx->mdctx);
4759 if (result == DNS_R_CONTINUE)
4760 return;
4761 if (result == ISC_R_NOTIMPLEMENTED) {
4762 fprintf(dctx->fp, "; %s\n",
4763 dns_result_totext(result));
4764 result = ISC_R_SUCCESS;
4765 goto nextzone;
4766 }
4767 if (result != ISC_R_SUCCESS)
4768 goto cleanup;
4769 }
4770 }
4771 if (dctx->view != NULL)
4772 dctx->view = ISC_LIST_NEXT(dctx->view, link);
4773 if (dctx->view != NULL)
4774 goto nextview;
4775 done:
4776 fprintf(dctx->fp, "; Dump complete\n");
4777 result = isc_stdio_flush(dctx->fp);
4778 if (result == ISC_R_SUCCESS)
4779 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4780 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4781 "dumpdb complete");
4782 cleanup:
4783 if (result != ISC_R_SUCCESS)
4784 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4785 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4786 "dumpdb failed: %s", dns_result_totext(result));
4787 dumpcontext_destroy(dctx);
4788 }
4789
4790 isc_result_t
4791 ns_server_dumpdb(ns_server_t *server, char *args) {
4792 struct dumpcontext *dctx = NULL;
4793 dns_view_t *view;
4794 isc_result_t result;
4795 char *ptr;
4796 const char *sep;
4797
4798 /* Skip the command name. */
4799 ptr = next_token(&args, " \t");
4800 if (ptr == NULL)
4801 return (ISC_R_UNEXPECTEDEND);
4802
4803 dctx = isc_mem_get(server->mctx, sizeof(*dctx));
4804 if (dctx == NULL)
4805 return (ISC_R_NOMEMORY);
4806
4807 dctx->mctx = server->mctx;
4808 dctx->dumpcache = ISC_TRUE;
4809 dctx->dumpzones = ISC_FALSE;
4810 dctx->fp = NULL;
4811 ISC_LIST_INIT(dctx->viewlist);
4812 dctx->view = NULL;
4813 dctx->zone = NULL;
4814 dctx->cache = NULL;
4815 dctx->mdctx = NULL;
4816 dctx->db = NULL;
4817 dctx->cache = NULL;
4818 dctx->task = NULL;
4819 dctx->version = NULL;
4820 isc_task_attach(server->task, &dctx->task);
4821
4822 CHECKMF(isc_stdio_open(server->dumpfile, "w", &dctx->fp),
4823 "could not open dump file", server->dumpfile);
4824
4825 sep = (args == NULL) ? "" : ": ";
4826 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4827 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4828 "dumpdb started%s%s", sep, (args != NULL) ? args : "");
4829
4830 ptr = next_token(&args, " \t");
4831 if (ptr != NULL && strcmp(ptr, "-all") == 0) {
4832 dctx->dumpzones = ISC_TRUE;
4833 dctx->dumpcache = ISC_TRUE;
4834 ptr = next_token(&args, " \t");
4835 } else if (ptr != NULL && strcmp(ptr, "-cache") == 0) {
4836 dctx->dumpzones = ISC_FALSE;
4837 dctx->dumpcache = ISC_TRUE;
4838 ptr = next_token(&args, " \t");
4839 } else if (ptr != NULL && strcmp(ptr, "-zones") == 0) {
4840 dctx->dumpzones = ISC_TRUE;
4841 dctx->dumpcache = ISC_FALSE;
4842 ptr = next_token(&args, " \t");
4843 }
4844
4845 nextview:
4846 for (view = ISC_LIST_HEAD(server->viewlist);
4847 view != NULL;
4848 view = ISC_LIST_NEXT(view, link))
4849 {
4850 if (ptr != NULL && strcmp(view->name, ptr) != 0)
4851 continue;
4852 CHECK(add_view_tolist(dctx, view));
4853 }
4854 if (ptr != NULL) {
4855 ptr = next_token(&args, " \t");
4856 if (ptr != NULL)
4857 goto nextview;
4858 }
4859 dumpdone(dctx, ISC_R_SUCCESS);
4860 return (ISC_R_SUCCESS);
4861
4862 cleanup:
4863 if (dctx != NULL)
4864 dumpcontext_destroy(dctx);
4865 return (result);
4866 }
4867
4868 isc_result_t
4869 ns_server_dumprecursing(ns_server_t *server) {
4870 FILE *fp = NULL;
4871 isc_result_t result;
4872
4873 CHECKMF(isc_stdio_open(server->recfile, "w", &fp),
4874 "could not open dump file", server->recfile);
4875 fprintf(fp,";\n; Recursing Queries\n;\n");
4876 ns_interfacemgr_dumprecursing(fp, server->interfacemgr);
4877 fprintf(fp, "; Dump complete\n");
4878
4879 cleanup:
4880 if (fp != NULL)
4881 result = isc_stdio_close(fp);
4882 if (result == ISC_R_SUCCESS)
4883 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4884 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4885 "dumprecursing complete");
4886 else
4887 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4888 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4889 "dumprecursing failed: %s",
4890 dns_result_totext(result));
4891 return (result);
4892 }
4893
4894 isc_result_t
4895 ns_server_setdebuglevel(ns_server_t *server, char *args) {
4896 char *ptr;
4897 char *levelstr;
4898 char *endp;
4899 long newlevel;
4900
4901 UNUSED(server);
4902
4903 /* Skip the command name. */
4904 ptr = next_token(&args, " \t");
4905 if (ptr == NULL)
4906 return (ISC_R_UNEXPECTEDEND);
4907
4908 /* Look for the new level name. */
4909 levelstr = next_token(&args, " \t");
4910 if (levelstr == NULL) {
4911 if (ns_g_debuglevel < 99)
4912 ns_g_debuglevel++;
4913 } else {
4914 newlevel = strtol(levelstr, &endp, 10);
4915 if (*endp != '\0' || newlevel < 0 || newlevel > 99)
4916 return (ISC_R_RANGE);
4917 ns_g_debuglevel = (unsigned int)newlevel;
4918 }
4919 isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
4920 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4921 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4922 "debug level is now %d", ns_g_debuglevel);
4923 return (ISC_R_SUCCESS);
4924 }
4925
4926 isc_result_t
4927 ns_server_validation(ns_server_t *server, char *args) {
4928 char *ptr, *viewname;
4929 dns_view_t *view;
4930 isc_boolean_t changed = ISC_FALSE;
4931 isc_result_t result;
4932 isc_boolean_t enable;
4933
4934 /* Skip the command name. */
4935 ptr = next_token(&args, " \t");
4936 if (ptr == NULL)
4937 return (ISC_R_UNEXPECTEDEND);
4938
4939 /* Find out what we are to do. */
4940 ptr = next_token(&args, " \t");
4941 if (ptr == NULL)
4942 return (ISC_R_UNEXPECTEDEND);
4943
4944 if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
4945 !strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
4946 enable = ISC_TRUE;
4947 else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
4948 !strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
4949 enable = ISC_FALSE;
4950 else
4951 return (DNS_R_SYNTAX);
4952
4953 /* Look for the view name. */
4954 viewname = next_token(&args, " \t");
4955
4956 result = isc_task_beginexclusive(server->task);
4957 RUNTIME_CHECK(result == ISC_R_SUCCESS);
4958 for (view = ISC_LIST_HEAD(server->viewlist);
4959 view != NULL;
4960 view = ISC_LIST_NEXT(view, link))
4961 {
4962 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
4963 continue;
4964 result = dns_view_flushcache(view);
4965 if (result != ISC_R_SUCCESS)
4966 goto out;
4967 view->enablevalidation = enable;
4968 changed = ISC_TRUE;
4969 }
4970 if (changed)
4971 result = ISC_R_SUCCESS;
4972 else
4973 result = ISC_R_FAILURE;
4974 out:
4975 isc_task_endexclusive(server->task);
4976 return (result);
4977 }
4978
4979 isc_result_t
4980 ns_server_flushcache(ns_server_t *server, char *args) {
4981 char *ptr, *viewname;
4982 dns_view_t *view;
4983 isc_boolean_t flushed;
4984 isc_boolean_t found;
4985 isc_result_t result;
4986
4987 /* Skip the command name. */
4988 ptr = next_token(&args, " \t");
4989 if (ptr == NULL)
4990 return (ISC_R_UNEXPECTEDEND);
4991
4992 /* Look for the view name. */
4993 viewname = next_token(&args, " \t");
4994
4995 result = isc_task_beginexclusive(server->task);
4996 RUNTIME_CHECK(result == ISC_R_SUCCESS);
4997 flushed = ISC_TRUE;
4998 found = ISC_FALSE;
4999 for (view = ISC_LIST_HEAD(server->viewlist);
5000 view != NULL;
5001 view = ISC_LIST_NEXT(view, link))
5002 {
5003 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
5004 continue;
5005 found = ISC_TRUE;
5006 result = dns_view_flushcache(view);
5007 if (result != ISC_R_SUCCESS) {
5008 flushed = ISC_FALSE;
5009 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5010 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5011 "flushing cache in view '%s' failed: %s",
5012 view->name, isc_result_totext(result));
5013 }
5014 }
5015 if (flushed && found) {
5016 if (viewname != NULL)
5017 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5018 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5019 "flushing cache in view '%s' succeeded",
5020 viewname);
5021 else
5022 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5023 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5024 "flushing caches in all views succeeded");
5025 result = ISC_R_SUCCESS;
5026 } else {
5027 if (!found) {
5028 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5029 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5030 "flushing cache in view '%s' failed: "
5031 "view not found", viewname);
5032 result = ISC_R_NOTFOUND;
5033 } else
5034 result = ISC_R_FAILURE;
5035 }
5036 isc_task_endexclusive(server->task);
5037 return (result);
5038 }
5039
5040 isc_result_t
5041 ns_server_flushname(ns_server_t *server, char *args) {
5042 char *ptr, *target, *viewname;
5043 dns_view_t *view;
5044 isc_boolean_t flushed;
5045 isc_boolean_t found;
5046 isc_result_t result;
5047 isc_buffer_t b;
5048 dns_fixedname_t fixed;
5049 dns_name_t *name;
5050
5051 /* Skip the command name. */
5052 ptr = next_token(&args, " \t");
5053 if (ptr == NULL)
5054 return (ISC_R_UNEXPECTEDEND);
5055
5056 /* Find the domain name to flush. */
5057 target = next_token(&args, " \t");
5058 if (target == NULL)
5059 return (ISC_R_UNEXPECTEDEND);
5060
5061 isc_buffer_init(&b, target, strlen(target));
5062 isc_buffer_add(&b, strlen(target));
5063 dns_fixedname_init(&fixed);
5064 name = dns_fixedname_name(&fixed);
5065 result = dns_name_fromtext(name, &b, dns_rootname, ISC_FALSE, NULL);
5066 if (result != ISC_R_SUCCESS)
5067 return (result);
5068
5069 /* Look for the view name. */
5070 viewname = next_token(&args, " \t");
5071
5072 result = isc_task_beginexclusive(server->task);
5073 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5074 flushed = ISC_TRUE;
5075 found = ISC_FALSE;
5076 for (view = ISC_LIST_HEAD(server->viewlist);
5077 view != NULL;
5078 view = ISC_LIST_NEXT(view, link))
5079 {
5080 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
5081 continue;
5082 found = ISC_TRUE;
5083 result = dns_view_flushname(view, name);
5084 if (result != ISC_R_SUCCESS) {
5085 flushed = ISC_FALSE;
5086 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5087 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5088 "flushing name '%s' in cache view '%s' "
5089 "failed: %s", target, view->name,
5090 isc_result_totext(result));
5091 }
5092 }
5093 if (flushed && found) {
5094 if (viewname != NULL)
5095 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5096 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5097 "flushing name '%s' in cache view '%s' "
5098 "succeeded", target, viewname);
5099 else
5100 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5101 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5102 "flushing name '%s' in all cache views "
5103 "succeeded", target);
5104 result = ISC_R_SUCCESS;
5105 } else {
5106 if (!found)
5107 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5108 NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5109 "flushing name '%s' in cache view '%s' "
5110 "failed: view not found", target,
5111 viewname);
5112 result = ISC_R_FAILURE;
5113 }
5114 isc_task_endexclusive(server->task);
5115 return (result);
5116 }
5117
5118 isc_result_t
5119 ns_server_status(ns_server_t *server, isc_buffer_t *text) {
5120 int zonecount, xferrunning, xferdeferred, soaqueries;
5121 unsigned int n;
5122 const char *ob = "", *cb = "", *alt = "";
5123
5124 if (ns_g_server->version_set) {
5125 ob = " (";
5126 cb = ")";
5127 if (ns_g_server->version == NULL)
5128 alt = "version.bind/txt/ch disabled";
5129 else
5130 alt = ns_g_server->version;
5131 }
5132 zonecount = dns_zonemgr_getcount(server->zonemgr, DNS_ZONESTATE_ANY);
5133 xferrunning = dns_zonemgr_getcount(server->zonemgr,
5134 DNS_ZONESTATE_XFERRUNNING);
5135 xferdeferred = dns_zonemgr_getcount(server->zonemgr,
5136 DNS_ZONESTATE_XFERDEFERRED);
5137 soaqueries = dns_zonemgr_getcount(server->zonemgr,
5138 DNS_ZONESTATE_SOAQUERY);
5139 n = snprintf((char *)isc_buffer_used(text),
5140 isc_buffer_availablelength(text),
5141 "version: %s%s%s%s\n"
5142 "number of zones: %u\n"
5143 "debug level: %d\n"
5144 "xfers running: %u\n"
5145 "xfers deferred: %u\n"
5146 "soa queries in progress: %u\n"
5147 "query logging is %s\n"
5148 "recursive clients: %d/%d/%d\n"
5149 "tcp clients: %d/%d\n"
5150 "server is up and running",
5151 ns_g_version, ob, alt, cb,
5152 zonecount, ns_g_debuglevel, xferrunning, xferdeferred,
5153 soaqueries, server->log_queries ? "ON" : "OFF",
5154 server->recursionquota.used, server->recursionquota.soft,
5155 server->recursionquota.max,
5156 server->tcpquota.used, server->tcpquota.max);
5157 if (n >= isc_buffer_availablelength(text))
5158 return (ISC_R_NOSPACE);
5159 isc_buffer_add(text, n);
5160 return (ISC_R_SUCCESS);
5161 }
5162
5163 static isc_result_t
5164 delete_keynames(dns_tsig_keyring_t *ring, char *target,
5165 unsigned int *foundkeys)
5166 {
5167 char namestr[DNS_NAME_FORMATSIZE];
5168 isc_result_t result;
5169 dns_rbtnodechain_t chain;
5170 dns_name_t foundname;
5171 dns_fixedname_t fixedorigin;
5172 dns_name_t *origin;
5173 dns_rbtnode_t *node;
5174 dns_tsigkey_t *tkey;
5175
5176 dns_name_init(&foundname, NULL);
5177 dns_fixedname_init(&fixedorigin);
5178 origin = dns_fixedname_name(&fixedorigin);
5179
5180 again:
5181 dns_rbtnodechain_init(&chain, ring->mctx);
5182 result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
5183 origin);
5184 if (result == ISC_R_NOTFOUND) {
5185 dns_rbtnodechain_invalidate(&chain);
5186 return (ISC_R_SUCCESS);
5187 }
5188 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
5189 dns_rbtnodechain_invalidate(&chain);
5190 return (result);
5191 }
5192
5193 for (;;) {
5194 node = NULL;
5195 dns_rbtnodechain_current(&chain, &foundname, origin, &node);
5196 tkey = node->data;
5197
5198 if (tkey != NULL) {
5199 if (!tkey->generated)
5200 goto nextkey;
5201
5202 dns_name_format(&tkey->name, namestr, sizeof(namestr));
5203 if (strcmp(namestr, target) == 0) {
5204 (*foundkeys)++;
5205 dns_rbtnodechain_invalidate(&chain);
5206 (void)dns_rbt_deletename(ring->keys,
5207 &tkey->name,
5208 ISC_FALSE);
5209 goto again;
5210 }
5211 }
5212
5213 nextkey:
5214 result = dns_rbtnodechain_next(&chain, &foundname, origin);
5215 if (result == ISC_R_NOMORE)
5216 break;
5217 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
5218 dns_rbtnodechain_invalidate(&chain);
5219 return (result);
5220 }
5221 }
5222
5223 return (ISC_R_SUCCESS);
5224 }
5225
5226 isc_result_t
5227 ns_server_tsigdelete(ns_server_t *server, char *command, isc_buffer_t *text) {
5228 isc_result_t result;
5229 unsigned int n;
5230 dns_view_t *view;
5231 unsigned int foundkeys = 0;
5232 char *target;
5233 char *viewname;
5234
5235 (void)next_token(&command, " \t"); /* skip command name */
5236 target = next_token(&command, " \t");
5237 if (target == NULL)
5238 return (ISC_R_UNEXPECTEDEND);
5239 viewname = next_token(&command, " \t");
5240
5241 result = isc_task_beginexclusive(server->task);
5242 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5243 for (view = ISC_LIST_HEAD(server->viewlist);
5244 view != NULL;
5245 view = ISC_LIST_NEXT(view, link)) {
5246 if (viewname == NULL || strcmp(view->name, viewname) == 0) {
5247 RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_write);
5248 result = delete_keynames(view->dynamickeys, target,
5249 &foundkeys);
5250 RWUNLOCK(&view->dynamickeys->lock,
5251 isc_rwlocktype_write);
5252 if (result != ISC_R_SUCCESS) {
5253 isc_task_endexclusive(server->task);
5254 return (result);
5255 }
5256 }
5257 }
5258 isc_task_endexclusive(server->task);
5259
5260 n = snprintf((char *)isc_buffer_used(text),
5261 isc_buffer_availablelength(text),
5262 "%d tsig keys deleted.\n", foundkeys);
5263 if (n >= isc_buffer_availablelength(text)) {
5264 isc_task_endexclusive(server->task);
5265 return (ISC_R_NOSPACE);
5266 }
5267 isc_buffer_add(text, n);
5268
5269 return (ISC_R_SUCCESS);
5270 }
5271
5272 static isc_result_t
5273 list_keynames(dns_view_t *view, dns_tsig_keyring_t *ring, isc_buffer_t *text,
5274 unsigned int *foundkeys)
5275 {
5276 char namestr[DNS_NAME_FORMATSIZE];
5277 char creatorstr[DNS_NAME_FORMATSIZE];
5278 isc_result_t result;
5279 dns_rbtnodechain_t chain;
5280 dns_name_t foundname;
5281 dns_fixedname_t fixedorigin;
5282 dns_name_t *origin;
5283 dns_rbtnode_t *node;
5284 dns_tsigkey_t *tkey;
5285 unsigned int n;
5286 const char *viewname;
5287
5288 if (view != NULL)
5289 viewname = view->name;
5290 else
5291 viewname = "(global)";
5292
5293 dns_name_init(&foundname, NULL);
5294 dns_fixedname_init(&fixedorigin);
5295 origin = dns_fixedname_name(&fixedorigin);
5296 dns_rbtnodechain_init(&chain, ring->mctx);
5297 result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
5298 origin);
5299 if (result == ISC_R_NOTFOUND) {
5300 dns_rbtnodechain_invalidate(&chain);
5301 return (ISC_R_SUCCESS);
5302 }
5303 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
5304 dns_rbtnodechain_invalidate(&chain);
5305 return (result);
5306 }
5307
5308 for (;;) {
5309 node = NULL;
5310 dns_rbtnodechain_current(&chain, &foundname, origin, &node);
5311 tkey = node->data;
5312
5313 if (tkey != NULL) {
5314 (*foundkeys)++;
5315 dns_name_format(&tkey->name, namestr, sizeof(namestr));
5316 if (tkey->generated) {
5317 dns_name_format(tkey->creator, creatorstr,
5318 sizeof(creatorstr));
5319 n = snprintf((char *)isc_buffer_used(text),
5320 isc_buffer_availablelength(text),
5321 "view \"%s\"; type \"dynamic\"; key \"%s\"; creator \"%s\";\n",
5322 viewname, namestr, creatorstr);
5323 } else {
5324 n = snprintf((char *)isc_buffer_used(text),
5325 isc_buffer_availablelength(text),
5326 "view \"%s\"; type \"static\"; key \"%s\";\n",
5327 viewname, namestr);
5328 }
5329 if (n >= isc_buffer_availablelength(text)) {
5330 dns_rbtnodechain_invalidate(&chain);
5331 return (ISC_R_NOSPACE);
5332 }
5333 isc_buffer_add(text, n);
5334 }
5335 result = dns_rbtnodechain_next(&chain, &foundname, origin);
5336 if (result == ISC_R_NOMORE)
5337 break;
5338 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
5339 dns_rbtnodechain_invalidate(&chain);
5340 return (result);
5341 }
5342 }
5343
5344 return (ISC_R_SUCCESS);
5345 }
5346
5347 isc_result_t
5348 ns_server_tsiglist(ns_server_t *server, isc_buffer_t *text) {
5349 isc_result_t result;
5350 unsigned int n;
5351 dns_view_t *view;
5352 unsigned int foundkeys = 0;
5353
5354 result = isc_task_beginexclusive(server->task);
5355 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5356 for (view = ISC_LIST_HEAD(server->viewlist);
5357 view != NULL;
5358 view = ISC_LIST_NEXT(view, link)) {
5359 RWLOCK(&view->statickeys->lock, isc_rwlocktype_read);
5360 result = list_keynames(view, view->statickeys, text,
5361 &foundkeys);
5362 RWUNLOCK(&view->statickeys->lock, isc_rwlocktype_read);
5363 if (result != ISC_R_SUCCESS) {
5364 isc_task_endexclusive(server->task);
5365 return (result);
5366 }
5367 RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
5368 result = list_keynames(view, view->dynamickeys, text,
5369 &foundkeys);
5370 RWUNLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
5371 if (result != ISC_R_SUCCESS) {
5372 isc_task_endexclusive(server->task);
5373 return (result);
5374 }
5375 }
5376 isc_task_endexclusive(server->task);
5377
5378 if (foundkeys == 0) {
5379 n = snprintf((char *)isc_buffer_used(text),
5380 isc_buffer_availablelength(text),
5381 "no tsig keys found.\n");
5382 if (n >= isc_buffer_availablelength(text)) {
5383 isc_task_endexclusive(server->task);
5384 return (ISC_R_NOSPACE);
5385 }
5386 isc_buffer_add(text, n);
5387 }
5388
5389 return (ISC_R_SUCCESS);
5390 }
5391
5392 /*
5393 * Act on a "freeze" or "thaw" command from the command channel.
5394 */
5395 isc_result_t
5396 ns_server_freeze(ns_server_t *server, isc_boolean_t freeze, char *args,
5397 isc_buffer_t *text)
5398 {
5399 isc_result_t result, tresult;
5400 dns_zone_t *zone = NULL;
5401 dns_zonetype_t type;
5402 char classstr[DNS_RDATACLASS_FORMATSIZE];
5403 char zonename[DNS_NAME_FORMATSIZE];
5404 dns_view_t *view;
5405 char *journal;
5406 const char *vname, *sep;
5407 isc_boolean_t frozen;
5408 const char *msg = NULL;
5409
5410 result = zone_from_args(server, args, &zone);
5411 if (result != ISC_R_SUCCESS)
5412 return (result);
5413 if (zone == NULL) {
5414 result = isc_task_beginexclusive(server->task);
5415 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5416 tresult = ISC_R_SUCCESS;
5417 for (view = ISC_LIST_HEAD(server->viewlist);
5418 view != NULL;
5419 view = ISC_LIST_NEXT(view, link)) {
5420 result = dns_view_freezezones(view, freeze);
5421 if (result != ISC_R_SUCCESS &&
5422 tresult == ISC_R_SUCCESS)
5423 tresult = result;
5424 }
5425 isc_task_endexclusive(server->task);
5426 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5427 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5428 "%s all zones: %s",
5429 freeze ? "freezing" : "thawing",
5430 isc_result_totext(tresult));
5431 return (tresult);
5432 }
5433 type = dns_zone_gettype(zone);
5434 if (type != dns_zone_master) {
5435 dns_zone_detach(&zone);
5436 return (ISC_R_NOTFOUND);
5437 }
5438
5439 frozen = dns_zone_getupdatedisabled(zone);
5440 if (freeze) {
5441 if (frozen) {
5442 msg = "WARNING: The zone was already frozen.\n"
5443 "Someone else may be editing it or "
5444 "it may still be re-loading.";
5445 result = DNS_R_FROZEN;
5446 }
5447 if (result == ISC_R_SUCCESS) {
5448 result = dns_zone_flush(zone);
5449 if (result != ISC_R_SUCCESS)
5450 msg = "Flushing the zone updates to "
5451 "disk failed.";
5452 }
5453 if (result == ISC_R_SUCCESS) {
5454 journal = dns_zone_getjournal(zone);
5455 if (journal != NULL)
5456 (void)isc_file_remove(journal);
5457 }
5458 if (result == ISC_R_SUCCESS)
5459 dns_zone_setupdatedisabled(zone, freeze);
5460 } else {
5461 if (frozen) {
5462 result = dns_zone_loadandthaw(zone);
5463 switch (result) {
5464 case ISC_R_SUCCESS:
5465 case DNS_R_UPTODATE:
5466 msg = "The zone reload and thaw was "
5467 "successful.";
5468 result = ISC_R_SUCCESS;
5469 break;
5470 case DNS_R_CONTINUE:
5471 msg = "A zone reload and thaw was started.\n"
5472 "Check the logs to see the result.";
5473 result = ISC_R_SUCCESS;
5474 break;
5475 }
5476 }
5477 }
5478
5479 if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
5480 isc_buffer_putmem(text, (const unsigned char *)msg,
5481 strlen(msg) + 1);
5482
5483 view = dns_zone_getview(zone);
5484 if (strcmp(view->name, "_bind") == 0 ||
5485 strcmp(view->name, "_default") == 0)
5486 {
5487 vname = "";
5488 sep = "";
5489 } else {
5490 vname = view->name;
5491 sep = " ";
5492 }
5493 dns_rdataclass_format(dns_zone_getclass(zone), classstr,
5494 sizeof(classstr));
5495 dns_name_format(dns_zone_getorigin(zone),
5496 zonename, sizeof(zonename));
5497 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5498 NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5499 "%s zone '%s/%s'%s%s: %s",
5500 freeze ? "freezing" : "thawing",
5501 zonename, classstr, sep, vname,
5502 isc_result_totext(result));
5503 dns_zone_detach(&zone);
5504 return (result);
5505 }
5506
5507 #ifdef HAVE_LIBSCF
5508 /*
5509 * This function adds a message for rndc to echo if named
5510 * is managed by smf and is also running chroot.
5511 */
5512 isc_result_t
5513 ns_smf_add_message(isc_buffer_t *text) {
5514 unsigned int n;
5515
5516 n = snprintf((char *)isc_buffer_used(text),
5517 isc_buffer_availablelength(text),
5518 "use svcadm(1M) to manage named");
5519 if (n >= isc_buffer_availablelength(text))
5520 return (ISC_R_NOSPACE);
5521 isc_buffer_add(text, n);
5522 return (ISC_R_SUCCESS);
5523 }
5524 #endif /* HAVE_LIBSCF */
DragonFly BSD