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turns printfs back on
[freebsd-src/fkvm-freebsd.git] / contrib / bind9 / bin / named / controlconf.c
blobf0703cb06505bc2d33876bfbd5600eee645dd89f
1 /*
2 * Copyright (C) 2004-2006, 2008 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2001-2003 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: controlconf.c,v 1.40.18.10.40.3 2008/07/23 23:16:43 marka Exp $ */
19
20 /*! \file */
21
22 #include <config.h>
23
24 #include <isc/base64.h>
25 #include <isc/buffer.h>
26 #include <isc/event.h>
27 #include <isc/mem.h>
28 #include <isc/net.h>
29 #include <isc/netaddr.h>
30 #include <isc/random.h>
31 #include <isc/result.h>
32 #include <isc/stdtime.h>
33 #include <isc/string.h>
34 #include <isc/timer.h>
35 #include <isc/util.h>
36
37 #include <isccfg/namedconf.h>
38
39 #include <bind9/check.h>
40
41 #include <isccc/alist.h>
42 #include <isccc/cc.h>
43 #include <isccc/ccmsg.h>
44 #include <isccc/events.h>
45 #include <isccc/result.h>
46 #include <isccc/sexpr.h>
47 #include <isccc/symtab.h>
48 #include <isccc/util.h>
49
50 #include <dns/result.h>
51
52 #include <named/config.h>
53 #include <named/control.h>
54 #include <named/log.h>
55 #include <named/server.h>
56
57 /*
58 * Note: Listeners and connections are not locked. All event handlers are
59 * executed by the server task, and all callers of exported routines must
60 * be running under the server task.
61 */
62
63 typedef struct controlkey controlkey_t;
64 typedef ISC_LIST(controlkey_t) controlkeylist_t;
65
66 typedef struct controlconnection controlconnection_t;
67 typedef ISC_LIST(controlconnection_t) controlconnectionlist_t;
68
69 typedef struct controllistener controllistener_t;
70 typedef ISC_LIST(controllistener_t) controllistenerlist_t;
71
72 struct controlkey {
73 char * keyname;
74 isc_region_t secret;
75 ISC_LINK(controlkey_t) link;
76 };
77
78 struct controlconnection {
79 isc_socket_t * sock;
80 isccc_ccmsg_t ccmsg;
81 isc_boolean_t ccmsg_valid;
82 isc_boolean_t sending;
83 isc_timer_t * timer;
84 unsigned char buffer[2048];
85 controllistener_t * listener;
86 isc_uint32_t nonce;
87 ISC_LINK(controlconnection_t) link;
88 };
89
90 struct controllistener {
91 ns_controls_t * controls;
92 isc_mem_t * mctx;
93 isc_task_t * task;
94 isc_sockaddr_t address;
95 isc_socket_t * sock;
96 dns_acl_t * acl;
97 isc_boolean_t listening;
98 isc_boolean_t exiting;
99 controlkeylist_t keys;
100 controlconnectionlist_t connections;
101 isc_sockettype_t type;
102 isc_uint32_t perm;
103 isc_uint32_t owner;
104 isc_uint32_t group;
105 ISC_LINK(controllistener_t) link;
106 };
107
108 struct ns_controls {
109 ns_server_t *server;
110 controllistenerlist_t listeners;
111 isc_boolean_t shuttingdown;
112 isccc_symtab_t *symtab;
113 };
114
115 static void control_newconn(isc_task_t *task, isc_event_t *event);
116 static void control_recvmessage(isc_task_t *task, isc_event_t *event);
117
118 #define CLOCKSKEW 300
119
120 static void
121 free_controlkey(controlkey_t *key, isc_mem_t *mctx) {
122 if (key->keyname != NULL)
123 isc_mem_free(mctx, key->keyname);
124 if (key->secret.base != NULL)
125 isc_mem_put(mctx, key->secret.base, key->secret.length);
126 isc_mem_put(mctx, key, sizeof(*key));
127 }
128
129 static void
130 free_controlkeylist(controlkeylist_t *keylist, isc_mem_t *mctx) {
131 while (!ISC_LIST_EMPTY(*keylist)) {
132 controlkey_t *key = ISC_LIST_HEAD(*keylist);
133 ISC_LIST_UNLINK(*keylist, key, link);
134 free_controlkey(key, mctx);
135 }
136 }
137
138 static void
139 free_listener(controllistener_t *listener) {
140 INSIST(listener->exiting);
141 INSIST(!listener->listening);
142 INSIST(ISC_LIST_EMPTY(listener->connections));
143
144 if (listener->sock != NULL)
145 isc_socket_detach(&listener->sock);
146
147 free_controlkeylist(&listener->keys, listener->mctx);
148
149 if (listener->acl != NULL)
150 dns_acl_detach(&listener->acl);
151
152 isc_mem_put(listener->mctx, listener, sizeof(*listener));
153 }
154
155 static void
156 maybe_free_listener(controllistener_t *listener) {
157 if (listener->exiting &&
158 !listener->listening &&
159 ISC_LIST_EMPTY(listener->connections))
160 free_listener(listener);
161 }
162
163 static void
164 maybe_free_connection(controlconnection_t *conn) {
165 controllistener_t *listener = conn->listener;
166
167 if (conn->timer != NULL)
168 isc_timer_detach(&conn->timer);
169
170 if (conn->ccmsg_valid) {
171 isccc_ccmsg_cancelread(&conn->ccmsg);
172 return;
173 }
174
175 if (conn->sending) {
176 isc_socket_cancel(conn->sock, listener->task,
177 ISC_SOCKCANCEL_SEND);
178 return;
179 }
180
181 ISC_LIST_UNLINK(listener->connections, conn, link);
182 isc_mem_put(listener->mctx, conn, sizeof(*conn));
183 }
184
185 static void
186 shutdown_listener(controllistener_t *listener) {
187 controlconnection_t *conn;
188 controlconnection_t *next;
189
190 if (!listener->exiting) {
191 char socktext[ISC_SOCKADDR_FORMATSIZE];
192
193 ISC_LIST_UNLINK(listener->controls->listeners, listener, link);
194
195 isc_sockaddr_format(&listener->address, socktext,
196 sizeof(socktext));
197 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
198 NS_LOGMODULE_CONTROL, ISC_LOG_NOTICE,
199 "stopping command channel on %s", socktext);
200 if (listener->type == isc_sockettype_unix)
201 isc_socket_cleanunix(&listener->address, ISC_TRUE);
202 listener->exiting = ISC_TRUE;
203 }
204
205 for (conn = ISC_LIST_HEAD(listener->connections);
206 conn != NULL;
207 conn = next)
208 {
209 next = ISC_LIST_NEXT(conn, link);
210 maybe_free_connection(conn);
211 }
212
213 if (listener->listening)
214 isc_socket_cancel(listener->sock, listener->task,
215 ISC_SOCKCANCEL_ACCEPT);
216
217 maybe_free_listener(listener);
218 }
219
220 static isc_boolean_t
221 address_ok(isc_sockaddr_t *sockaddr, dns_acl_t *acl) {
222 isc_netaddr_t netaddr;
223 isc_result_t result;
224 int match;
225
226 isc_netaddr_fromsockaddr(&netaddr, sockaddr);
227
228 result = dns_acl_match(&netaddr, NULL, acl,
229 &ns_g_server->aclenv, &match, NULL);
230
231 if (result != ISC_R_SUCCESS || match <= 0)
232 return (ISC_FALSE);
233 else
234 return (ISC_TRUE);
235 }
236
237 static isc_result_t
238 control_accept(controllistener_t *listener) {
239 isc_result_t result;
240 result = isc_socket_accept(listener->sock,
241 listener->task,
242 control_newconn, listener);
243 if (result != ISC_R_SUCCESS)
244 UNEXPECTED_ERROR(__FILE__, __LINE__,
245 "isc_socket_accept() failed: %s",
246 isc_result_totext(result));
247 else
248 listener->listening = ISC_TRUE;
249 return (result);
250 }
251
252 static isc_result_t
253 control_listen(controllistener_t *listener) {
254 isc_result_t result;
255
256 result = isc_socket_listen(listener->sock, 0);
257 if (result != ISC_R_SUCCESS)
258 UNEXPECTED_ERROR(__FILE__, __LINE__,
259 "isc_socket_listen() failed: %s",
260 isc_result_totext(result));
261 return (result);
262 }
263
264 static void
265 control_next(controllistener_t *listener) {
266 (void)control_accept(listener);
267 }
268
269 static void
270 control_senddone(isc_task_t *task, isc_event_t *event) {
271 isc_socketevent_t *sevent = (isc_socketevent_t *) event;
272 controlconnection_t *conn = event->ev_arg;
273 controllistener_t *listener = conn->listener;
274 isc_socket_t *sock = (isc_socket_t *)sevent->ev_sender;
275 isc_result_t result;
276
277 REQUIRE(conn->sending);
278
279 UNUSED(task);
280
281 conn->sending = ISC_FALSE;
282
283 if (sevent->result != ISC_R_SUCCESS &&
284 sevent->result != ISC_R_CANCELED)
285 {
286 char socktext[ISC_SOCKADDR_FORMATSIZE];
287 isc_sockaddr_t peeraddr;
288
289 (void)isc_socket_getpeername(sock, &peeraddr);
290 isc_sockaddr_format(&peeraddr, socktext, sizeof(socktext));
291 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
292 NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
293 "error sending command response to %s: %s",
294 socktext, isc_result_totext(sevent->result));
295 }
296 isc_event_free(&event);
297
298 result = isccc_ccmsg_readmessage(&conn->ccmsg, listener->task,
299 control_recvmessage, conn);
300 if (result != ISC_R_SUCCESS) {
301 isc_socket_detach(&conn->sock);
302 maybe_free_connection(conn);
303 maybe_free_listener(listener);
304 }
305 }
306
307 static inline void
308 log_invalid(isccc_ccmsg_t *ccmsg, isc_result_t result) {
309 char socktext[ISC_SOCKADDR_FORMATSIZE];
310 isc_sockaddr_t peeraddr;
311
312 (void)isc_socket_getpeername(ccmsg->sock, &peeraddr);
313 isc_sockaddr_format(&peeraddr, socktext, sizeof(socktext));
314 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
315 NS_LOGMODULE_CONTROL, ISC_LOG_ERROR,
316 "invalid command from %s: %s",
317 socktext, isc_result_totext(result));
318 }
319
320 static void
321 control_recvmessage(isc_task_t *task, isc_event_t *event) {
322 controlconnection_t *conn;
323 controllistener_t *listener;
324 controlkey_t *key;
325 isccc_sexpr_t *request = NULL;
326 isccc_sexpr_t *response = NULL;
327 isccc_region_t ccregion;
328 isccc_region_t secret;
329 isc_stdtime_t now;
330 isc_buffer_t b;
331 isc_region_t r;
332 isc_uint32_t len;
333 isc_buffer_t text;
334 char textarray[1024];
335 isc_result_t result;
336 isc_result_t eresult;
337 isccc_sexpr_t *_ctrl;
338 isccc_time_t sent;
339 isccc_time_t exp;
340 isc_uint32_t nonce;
341
342 REQUIRE(event->ev_type == ISCCC_EVENT_CCMSG);
343
344 conn = event->ev_arg;
345 listener = conn->listener;
346 secret.rstart = NULL;
347
348 /* Is the server shutting down? */
349 if (listener->controls->shuttingdown)
350 goto cleanup;
351
352 if (conn->ccmsg.result != ISC_R_SUCCESS) {
353 if (conn->ccmsg.result != ISC_R_CANCELED &&
354 conn->ccmsg.result != ISC_R_EOF)
355 log_invalid(&conn->ccmsg, conn->ccmsg.result);
356 goto cleanup;
357 }
358
359 request = NULL;
360
361 for (key = ISC_LIST_HEAD(listener->keys);
362 key != NULL;
363 key = ISC_LIST_NEXT(key, link))
364 {
365 ccregion.rstart = isc_buffer_base(&conn->ccmsg.buffer);
366 ccregion.rend = isc_buffer_used(&conn->ccmsg.buffer);
367 if (secret.rstart != NULL)
368 isc_mem_put(listener->mctx, secret.rstart,
369 REGION_SIZE(secret));
370 secret.rstart = isc_mem_get(listener->mctx, key->secret.length);
371 if (secret.rstart == NULL)
372 goto cleanup;
373 memcpy(secret.rstart, key->secret.base, key->secret.length);
374 secret.rend = secret.rstart + key->secret.length;
375 result = isccc_cc_fromwire(&ccregion, &request, &secret);
376 if (result == ISC_R_SUCCESS)
377 break;
378 else if (result == ISCCC_R_BADAUTH) {
379 /*
380 * For some reason, request is non-NULL when
381 * isccc_cc_fromwire returns ISCCC_R_BADAUTH.
382 */
383 if (request != NULL)
384 isccc_sexpr_free(&request);
385 } else {
386 log_invalid(&conn->ccmsg, result);
387 goto cleanup;
388 }
389 }
390
391 if (key == NULL) {
392 log_invalid(&conn->ccmsg, ISCCC_R_BADAUTH);
393 goto cleanup;
394 }
395
396 /* We shouldn't be getting a reply. */
397 if (isccc_cc_isreply(request)) {
398 log_invalid(&conn->ccmsg, ISC_R_FAILURE);
399 goto cleanup;
400 }
401
402 isc_stdtime_get(&now);
403
404 /*
405 * Limit exposure to replay attacks.
406 */
407 _ctrl = isccc_alist_lookup(request, "_ctrl");
408 if (_ctrl == NULL) {
409 log_invalid(&conn->ccmsg, ISC_R_FAILURE);
410 goto cleanup;
411 }
412
413 if (isccc_cc_lookupuint32(_ctrl, "_tim", &sent) == ISC_R_SUCCESS) {
414 if ((sent + CLOCKSKEW) < now || (sent - CLOCKSKEW) > now) {
415 log_invalid(&conn->ccmsg, ISCCC_R_CLOCKSKEW);
416 goto cleanup;
417 }
418 } else {
419 log_invalid(&conn->ccmsg, ISC_R_FAILURE);
420 goto cleanup;
421 }
422
423 /*
424 * Expire messages that are too old.
425 */
426 if (isccc_cc_lookupuint32(_ctrl, "_exp", &exp) == ISC_R_SUCCESS &&
427 now > exp) {
428 log_invalid(&conn->ccmsg, ISCCC_R_EXPIRED);
429 goto cleanup;
430 }
431
432 /*
433 * Duplicate suppression (required for UDP).
434 */
435 isccc_cc_cleansymtab(listener->controls->symtab, now);
436 result = isccc_cc_checkdup(listener->controls->symtab, request, now);
437 if (result != ISC_R_SUCCESS) {
438 if (result == ISC_R_EXISTS)
439 result = ISCCC_R_DUPLICATE;
440 log_invalid(&conn->ccmsg, result);
441 goto cleanup;
442 }
443
444 if (conn->nonce != 0 &&
445 (isccc_cc_lookupuint32(_ctrl, "_nonce", &nonce) != ISC_R_SUCCESS ||
446 conn->nonce != nonce)) {
447 log_invalid(&conn->ccmsg, ISCCC_R_BADAUTH);
448 goto cleanup;
449 }
450
451 /*
452 * Establish nonce.
453 */
454 while (conn->nonce == 0)
455 isc_random_get(&conn->nonce);
456
457 isc_buffer_init(&text, textarray, sizeof(textarray));
458 eresult = ns_control_docommand(request, &text);
459
460 result = isccc_cc_createresponse(request, now, now + 60, &response);
461 if (result != ISC_R_SUCCESS)
462 goto cleanup;
463 if (eresult != ISC_R_SUCCESS) {
464 isccc_sexpr_t *data;
465
466 data = isccc_alist_lookup(response, "_data");
467 if (data != NULL) {
468 const char *estr = isc_result_totext(eresult);
469 if (isccc_cc_definestring(data, "err", estr) == NULL)
470 goto cleanup;
471 }
472 }
473
474 if (isc_buffer_usedlength(&text) > 0) {
475 isccc_sexpr_t *data;
476
477 data = isccc_alist_lookup(response, "_data");
478 if (data != NULL) {
479 char *str = (char *)isc_buffer_base(&text);
480 if (isccc_cc_definestring(data, "text", str) == NULL)
481 goto cleanup;
482 }
483 }
484
485 _ctrl = isccc_alist_lookup(response, "_ctrl");
486 if (_ctrl == NULL ||
487 isccc_cc_defineuint32(_ctrl, "_nonce", conn->nonce) == NULL)
488 goto cleanup;
489
490 ccregion.rstart = conn->buffer + 4;
491 ccregion.rend = conn->buffer + sizeof(conn->buffer);
492 result = isccc_cc_towire(response, &ccregion, &secret);
493 if (result != ISC_R_SUCCESS)
494 goto cleanup;
495 isc_buffer_init(&b, conn->buffer, 4);
496 len = sizeof(conn->buffer) - REGION_SIZE(ccregion);
497 isc_buffer_putuint32(&b, len - 4);
498 r.base = conn->buffer;
499 r.length = len;
500
501 result = isc_socket_send(conn->sock, &r, task, control_senddone, conn);
502 if (result != ISC_R_SUCCESS)
503 goto cleanup;
504 conn->sending = ISC_TRUE;
505
506 if (secret.rstart != NULL)
507 isc_mem_put(listener->mctx, secret.rstart,
508 REGION_SIZE(secret));
509 if (request != NULL)
510 isccc_sexpr_free(&request);
511 if (response != NULL)
512 isccc_sexpr_free(&response);
513 return;
514
515 cleanup:
516 if (secret.rstart != NULL)
517 isc_mem_put(listener->mctx, secret.rstart,
518 REGION_SIZE(secret));
519 isc_socket_detach(&conn->sock);
520 isccc_ccmsg_invalidate(&conn->ccmsg);
521 conn->ccmsg_valid = ISC_FALSE;
522 maybe_free_connection(conn);
523 maybe_free_listener(listener);
524 if (request != NULL)
525 isccc_sexpr_free(&request);
526 if (response != NULL)
527 isccc_sexpr_free(&response);
528 }
529
530 static void
531 control_timeout(isc_task_t *task, isc_event_t *event) {
532 controlconnection_t *conn = event->ev_arg;
533
534 UNUSED(task);
535
536 isc_timer_detach(&conn->timer);
537 maybe_free_connection(conn);
538
539 isc_event_free(&event);
540 }
541
542 static isc_result_t
543 newconnection(controllistener_t *listener, isc_socket_t *sock) {
544 controlconnection_t *conn;
545 isc_interval_t interval;
546 isc_result_t result;
547
548 conn = isc_mem_get(listener->mctx, sizeof(*conn));
549 if (conn == NULL)
550 return (ISC_R_NOMEMORY);
551
552 conn->sock = sock;
553 isccc_ccmsg_init(listener->mctx, sock, &conn->ccmsg);
554 conn->ccmsg_valid = ISC_TRUE;
555 conn->sending = ISC_FALSE;
556 conn->timer = NULL;
557 isc_interval_set(&interval, 60, 0);
558 result = isc_timer_create(ns_g_timermgr, isc_timertype_once,
559 NULL, &interval, listener->task,
560 control_timeout, conn, &conn->timer);
561 if (result != ISC_R_SUCCESS)
562 goto cleanup;
563
564 conn->listener = listener;
565 conn->nonce = 0;
566 ISC_LINK_INIT(conn, link);
567
568 result = isccc_ccmsg_readmessage(&conn->ccmsg, listener->task,
569 control_recvmessage, conn);
570 if (result != ISC_R_SUCCESS)
571 goto cleanup;
572 isccc_ccmsg_setmaxsize(&conn->ccmsg, 2048);
573
574 ISC_LIST_APPEND(listener->connections, conn, link);
575 return (ISC_R_SUCCESS);
576
577 cleanup:
578 isccc_ccmsg_invalidate(&conn->ccmsg);
579 if (conn->timer != NULL)
580 isc_timer_detach(&conn->timer);
581 isc_mem_put(listener->mctx, conn, sizeof(*conn));
582 return (result);
583 }
584
585 static void
586 control_newconn(isc_task_t *task, isc_event_t *event) {
587 isc_socket_newconnev_t *nevent = (isc_socket_newconnev_t *)event;
588 controllistener_t *listener = event->ev_arg;
589 isc_socket_t *sock;
590 isc_sockaddr_t peeraddr;
591 isc_result_t result;
592
593 UNUSED(task);
594
595 listener->listening = ISC_FALSE;
596
597 if (nevent->result != ISC_R_SUCCESS) {
598 if (nevent->result == ISC_R_CANCELED) {
599 shutdown_listener(listener);
600 goto cleanup;
601 }
602 goto restart;
603 }
604
605 sock = nevent->newsocket;
606 (void)isc_socket_getpeername(sock, &peeraddr);
607 if (listener->type == isc_sockettype_tcp &&
608 !address_ok(&peeraddr, listener->acl)) {
609 char socktext[ISC_SOCKADDR_FORMATSIZE];
610 isc_sockaddr_format(&peeraddr, socktext, sizeof(socktext));
611 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
612 NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
613 "rejected command channel message from %s",
614 socktext);
615 isc_socket_detach(&sock);
616 goto restart;
617 }
618
619 result = newconnection(listener, sock);
620 if (result != ISC_R_SUCCESS) {
621 char socktext[ISC_SOCKADDR_FORMATSIZE];
622 isc_sockaddr_format(&peeraddr, socktext, sizeof(socktext));
623 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
624 NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
625 "dropped command channel from %s: %s",
626 socktext, isc_result_totext(result));
627 isc_socket_detach(&sock);
628 goto restart;
629 }
630
631 restart:
632 control_next(listener);
633 cleanup:
634 isc_event_free(&event);
635 }
636
637 static void
638 controls_shutdown(ns_controls_t *controls) {
639 controllistener_t *listener;
640 controllistener_t *next;
641
642 for (listener = ISC_LIST_HEAD(controls->listeners);
643 listener != NULL;
644 listener = next)
645 {
646 /*
647 * This is asynchronous. As listeners shut down, they will
648 * call their callbacks.
649 */
650 next = ISC_LIST_NEXT(listener, link);
651 shutdown_listener(listener);
652 }
653 }
654
655 void
656 ns_controls_shutdown(ns_controls_t *controls) {
657 controls_shutdown(controls);
658 controls->shuttingdown = ISC_TRUE;
659 }
660
661 static isc_result_t
662 cfgkeylist_find(const cfg_obj_t *keylist, const char *keyname,
663 const cfg_obj_t **objp)
664 {
665 const cfg_listelt_t *element;
666 const char *str;
667 const cfg_obj_t *obj;
668
669 for (element = cfg_list_first(keylist);
670 element != NULL;
671 element = cfg_list_next(element))
672 {
673 obj = cfg_listelt_value(element);
674 str = cfg_obj_asstring(cfg_map_getname(obj));
675 if (strcasecmp(str, keyname) == 0)
676 break;
677 }
678 if (element == NULL)
679 return (ISC_R_NOTFOUND);
680 obj = cfg_listelt_value(element);
681 *objp = obj;
682 return (ISC_R_SUCCESS);
683 }
684
685 static isc_result_t
686 controlkeylist_fromcfg(const cfg_obj_t *keylist, isc_mem_t *mctx,
687 controlkeylist_t *keyids)
688 {
689 const cfg_listelt_t *element;
690 char *newstr = NULL;
691 const char *str;
692 const cfg_obj_t *obj;
693 controlkey_t *key;
694
695 for (element = cfg_list_first(keylist);
696 element != NULL;
697 element = cfg_list_next(element))
698 {
699 obj = cfg_listelt_value(element);
700 str = cfg_obj_asstring(obj);
701 newstr = isc_mem_strdup(mctx, str);
702 if (newstr == NULL)
703 goto cleanup;
704 key = isc_mem_get(mctx, sizeof(*key));
705 if (key == NULL)
706 goto cleanup;
707 key->keyname = newstr;
708 key->secret.base = NULL;
709 key->secret.length = 0;
710 ISC_LINK_INIT(key, link);
711 ISC_LIST_APPEND(*keyids, key, link);
712 newstr = NULL;
713 }
714 return (ISC_R_SUCCESS);
715
716 cleanup:
717 if (newstr != NULL)
718 isc_mem_free(mctx, newstr);
719 free_controlkeylist(keyids, mctx);
720 return (ISC_R_NOMEMORY);
721 }
722
723 static void
724 register_keys(const cfg_obj_t *control, const cfg_obj_t *keylist,
725 controlkeylist_t *keyids, isc_mem_t *mctx, const char *socktext)
726 {
727 controlkey_t *keyid, *next;
728 const cfg_obj_t *keydef;
729 char secret[1024];
730 isc_buffer_t b;
731 isc_result_t result;
732
733 /*
734 * Find the keys corresponding to the keyids used by this listener.
735 */
736 for (keyid = ISC_LIST_HEAD(*keyids); keyid != NULL; keyid = next) {
737 next = ISC_LIST_NEXT(keyid, link);
738
739 result = cfgkeylist_find(keylist, keyid->keyname, &keydef);
740 if (result != ISC_R_SUCCESS) {
741 cfg_obj_log(control, ns_g_lctx, ISC_LOG_WARNING,
742 "couldn't find key '%s' for use with "
743 "command channel %s",
744 keyid->keyname, socktext);
745 ISC_LIST_UNLINK(*keyids, keyid, link);
746 free_controlkey(keyid, mctx);
747 } else {
748 const cfg_obj_t *algobj = NULL;
749 const cfg_obj_t *secretobj = NULL;
750 const char *algstr = NULL;
751 const char *secretstr = NULL;
752
753 (void)cfg_map_get(keydef, "algorithm", &algobj);
754 (void)cfg_map_get(keydef, "secret", &secretobj);
755 INSIST(algobj != NULL && secretobj != NULL);
756
757 algstr = cfg_obj_asstring(algobj);
758 secretstr = cfg_obj_asstring(secretobj);
759
760 if (ns_config_getkeyalgorithm(algstr, NULL, NULL) !=
761 ISC_R_SUCCESS)
762 {
763 cfg_obj_log(control, ns_g_lctx,
764 ISC_LOG_WARNING,
765 "unsupported algorithm '%s' in "
766 "key '%s' for use with command "
767 "channel %s",
768 algstr, keyid->keyname, socktext);
769 ISC_LIST_UNLINK(*keyids, keyid, link);
770 free_controlkey(keyid, mctx);
771 continue;
772 }
773
774 isc_buffer_init(&b, secret, sizeof(secret));
775 result = isc_base64_decodestring(secretstr, &b);
776
777 if (result != ISC_R_SUCCESS) {
778 cfg_obj_log(keydef, ns_g_lctx, ISC_LOG_WARNING,
779 "secret for key '%s' on "
780 "command channel %s: %s",
781 keyid->keyname, socktext,
782 isc_result_totext(result));
783 ISC_LIST_UNLINK(*keyids, keyid, link);
784 free_controlkey(keyid, mctx);
785 continue;
786 }
787
788 keyid->secret.length = isc_buffer_usedlength(&b);
789 keyid->secret.base = isc_mem_get(mctx,
790 keyid->secret.length);
791 if (keyid->secret.base == NULL) {
792 cfg_obj_log(keydef, ns_g_lctx, ISC_LOG_WARNING,
793 "couldn't register key '%s': "
794 "out of memory", keyid->keyname);
795 ISC_LIST_UNLINK(*keyids, keyid, link);
796 free_controlkey(keyid, mctx);
797 break;
798 }
799 memcpy(keyid->secret.base, isc_buffer_base(&b),
800 keyid->secret.length);
801 }
802 }
803 }
804
805 #define CHECK(x) \
806 do { \
807 result = (x); \
808 if (result != ISC_R_SUCCESS) \
809 goto cleanup; \
810 } while (0)
811
812 static isc_result_t
813 get_rndckey(isc_mem_t *mctx, controlkeylist_t *keyids) {
814 isc_result_t result;
815 cfg_parser_t *pctx = NULL;
816 cfg_obj_t *config = NULL;
817 const cfg_obj_t *key = NULL;
818 const cfg_obj_t *algobj = NULL;
819 const cfg_obj_t *secretobj = NULL;
820 const char *algstr = NULL;
821 const char *secretstr = NULL;
822 controlkey_t *keyid = NULL;
823 char secret[1024];
824 isc_buffer_t b;
825
826 CHECK(cfg_parser_create(mctx, ns_g_lctx, &pctx));
827 CHECK(cfg_parse_file(pctx, ns_g_keyfile, &cfg_type_rndckey, &config));
828 CHECK(cfg_map_get(config, "key", &key));
829
830 keyid = isc_mem_get(mctx, sizeof(*keyid));
831 if (keyid == NULL)
832 CHECK(ISC_R_NOMEMORY);
833 keyid->keyname = isc_mem_strdup(mctx,
834 cfg_obj_asstring(cfg_map_getname(key)));
835 keyid->secret.base = NULL;
836 keyid->secret.length = 0;
837 ISC_LINK_INIT(keyid, link);
838 if (keyid->keyname == NULL)
839 CHECK(ISC_R_NOMEMORY);
840
841 CHECK(bind9_check_key(key, ns_g_lctx));
842
843 (void)cfg_map_get(key, "algorithm", &algobj);
844 (void)cfg_map_get(key, "secret", &secretobj);
845 INSIST(algobj != NULL && secretobj != NULL);
846
847 algstr = cfg_obj_asstring(algobj);
848 secretstr = cfg_obj_asstring(secretobj);
849
850 if (ns_config_getkeyalgorithm(algstr, NULL, NULL) != ISC_R_SUCCESS) {
851 cfg_obj_log(key, ns_g_lctx,
852 ISC_LOG_WARNING,
853 "unsupported algorithm '%s' in "
854 "key '%s' for use with command "
855 "channel",
856 algstr, keyid->keyname);
857 goto cleanup;
858 }
859
860 isc_buffer_init(&b, secret, sizeof(secret));
861 result = isc_base64_decodestring(secretstr, &b);
862
863 if (result != ISC_R_SUCCESS) {
864 cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
865 "secret for key '%s' on command channel: %s",
866 keyid->keyname, isc_result_totext(result));
867 CHECK(result);
868 }
869
870 keyid->secret.length = isc_buffer_usedlength(&b);
871 keyid->secret.base = isc_mem_get(mctx,
872 keyid->secret.length);
873 if (keyid->secret.base == NULL) {
874 cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
875 "couldn't register key '%s': "
876 "out of memory", keyid->keyname);
877 CHECK(ISC_R_NOMEMORY);
878 }
879 memcpy(keyid->secret.base, isc_buffer_base(&b),
880 keyid->secret.length);
881 ISC_LIST_APPEND(*keyids, keyid, link);
882 keyid = NULL;
883 result = ISC_R_SUCCESS;
884
885 cleanup:
886 if (keyid != NULL)
887 free_controlkey(keyid, mctx);
888 if (config != NULL)
889 cfg_obj_destroy(pctx, &config);
890 if (pctx != NULL)
891 cfg_parser_destroy(&pctx);
892 return (result);
893 }
894
895 /*
896 * Ensures that both '*global_keylistp' and '*control_keylistp' are
897 * valid or both are NULL.
898 */
899 static void
900 get_key_info(const cfg_obj_t *config, const cfg_obj_t *control,
901 const cfg_obj_t **global_keylistp,
902 const cfg_obj_t **control_keylistp)
903 {
904 isc_result_t result;
905 const cfg_obj_t *control_keylist = NULL;
906 const cfg_obj_t *global_keylist = NULL;
907
908 REQUIRE(global_keylistp != NULL && *global_keylistp == NULL);
909 REQUIRE(control_keylistp != NULL && *control_keylistp == NULL);
910
911 control_keylist = cfg_tuple_get(control, "keys");
912
913 if (!cfg_obj_isvoid(control_keylist) &&
914 cfg_list_first(control_keylist) != NULL) {
915 result = cfg_map_get(config, "key", &global_keylist);
916
917 if (result == ISC_R_SUCCESS) {
918 *global_keylistp = global_keylist;
919 *control_keylistp = control_keylist;
920 }
921 }
922 }
923
924 static void
925 update_listener(ns_controls_t *cp, controllistener_t **listenerp,
926 const cfg_obj_t *control, const cfg_obj_t *config,
927 isc_sockaddr_t *addr, cfg_aclconfctx_t *aclconfctx,
928 const char *socktext, isc_sockettype_t type)
929 {
930 controllistener_t *listener;
931 const cfg_obj_t *allow;
932 const cfg_obj_t *global_keylist = NULL;
933 const cfg_obj_t *control_keylist = NULL;
934 dns_acl_t *new_acl = NULL;
935 controlkeylist_t keys;
936 isc_result_t result = ISC_R_SUCCESS;
937
938 for (listener = ISC_LIST_HEAD(cp->listeners);
939 listener != NULL;
940 listener = ISC_LIST_NEXT(listener, link))
941 if (isc_sockaddr_equal(addr, &listener->address))
942 break;
943
944 if (listener == NULL) {
945 *listenerp = NULL;
946 return;
947 }
948
949 /*
950 * There is already a listener for this sockaddr.
951 * Update the access list and key information.
952 *
953 * First try to deal with the key situation. There are a few
954 * possibilities:
955 * (a) It had an explicit keylist and still has an explicit keylist.
956 * (b) It had an automagic key and now has an explicit keylist.
957 * (c) It had an explicit keylist and now needs an automagic key.
958 * (d) It has an automagic key and still needs the automagic key.
959 *
960 * (c) and (d) are the annoying ones. The caller needs to know
961 * that it should use the automagic configuration for key information
962 * in place of the named.conf configuration.
963 *
964 * XXXDCL There is one other hazard that has not been dealt with,
965 * the problem that if a key change is being caused by a control
966 * channel reload, then the response will be with the new key
967 * and not able to be decrypted by the client.
968 */
969 if (control != NULL)
970 get_key_info(config, control, &global_keylist,
971 &control_keylist);
972
973 if (control_keylist != NULL) {
974 INSIST(global_keylist != NULL);
975
976 ISC_LIST_INIT(keys);
977 result = controlkeylist_fromcfg(control_keylist,
978 listener->mctx, &keys);
979 if (result == ISC_R_SUCCESS) {
980 free_controlkeylist(&listener->keys, listener->mctx);
981 listener->keys = keys;
982 register_keys(control, global_keylist, &listener->keys,
983 listener->mctx, socktext);
984 }
985 } else {
986 free_controlkeylist(&listener->keys, listener->mctx);
987 result = get_rndckey(listener->mctx, &listener->keys);
988 }
989
990 if (result != ISC_R_SUCCESS && global_keylist != NULL) {
991 /*
992 * This message might be a little misleading since the
993 * "new keys" might in fact be identical to the old ones,
994 * but tracking whether they are identical just for the
995 * sake of avoiding this message would be too much trouble.
996 */
997 if (control != NULL)
998 cfg_obj_log(control, ns_g_lctx, ISC_LOG_WARNING,
999 "couldn't install new keys for "
1000 "command channel %s: %s",
1001 socktext, isc_result_totext(result));
1002 else
1003 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1004 NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
1005 "couldn't install new keys for "
1006 "command channel %s: %s",
1007 socktext, isc_result_totext(result));
1008 }
1009
1010 /*
1011 * Now, keep the old access list unless a new one can be made.
1012 */
1013 if (control != NULL && type == isc_sockettype_tcp) {
1014 allow = cfg_tuple_get(control, "allow");
1015 result = cfg_acl_fromconfig(allow, config, ns_g_lctx,
1016 aclconfctx, listener->mctx,
1017 &new_acl);
1018 } else {
1019 result = dns_acl_any(listener->mctx, &new_acl);
1020 }
1021
1022 if (result == ISC_R_SUCCESS) {
1023 dns_acl_detach(&listener->acl);
1024 dns_acl_attach(new_acl, &listener->acl);
1025 dns_acl_detach(&new_acl);
1026 /* XXXDCL say the old acl is still used? */
1027 } else if (control != NULL)
1028 cfg_obj_log(control, ns_g_lctx, ISC_LOG_WARNING,
1029 "couldn't install new acl for "
1030 "command channel %s: %s",
1031 socktext, isc_result_totext(result));
1032 else
1033 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1034 NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
1035 "couldn't install new acl for "
1036 "command channel %s: %s",
1037 socktext, isc_result_totext(result));
1038
1039 if (result == ISC_R_SUCCESS && type == isc_sockettype_unix) {
1040 isc_uint32_t perm, owner, group;
1041 perm = cfg_obj_asuint32(cfg_tuple_get(control, "perm"));
1042 owner = cfg_obj_asuint32(cfg_tuple_get(control, "owner"));
1043 group = cfg_obj_asuint32(cfg_tuple_get(control, "group"));
1044 result = ISC_R_SUCCESS;
1045 if (listener->perm != perm || listener->owner != owner ||
1046 listener->group != group)
1047 result = isc_socket_permunix(&listener->address, perm,
1048 owner, group);
1049 if (result == ISC_R_SUCCESS) {
1050 listener->perm = perm;
1051 listener->owner = owner;
1052 listener->group = group;
1053 } else if (control != NULL)
1054 cfg_obj_log(control, ns_g_lctx, ISC_LOG_WARNING,
1055 "couldn't update ownership/permission for "
1056 "command channel %s", socktext);
1057 }
1058
1059 *listenerp = listener;
1060 }
1061
1062 static void
1063 add_listener(ns_controls_t *cp, controllistener_t **listenerp,
1064 const cfg_obj_t *control, const cfg_obj_t *config,
1065 isc_sockaddr_t *addr, cfg_aclconfctx_t *aclconfctx,
1066 const char *socktext, isc_sockettype_t type)
1067 {
1068 isc_mem_t *mctx = cp->server->mctx;
1069 controllistener_t *listener;
1070 const cfg_obj_t *allow;
1071 const cfg_obj_t *global_keylist = NULL;
1072 const cfg_obj_t *control_keylist = NULL;
1073 dns_acl_t *new_acl = NULL;
1074 isc_result_t result = ISC_R_SUCCESS;
1075
1076 listener = isc_mem_get(mctx, sizeof(*listener));
1077 if (listener == NULL)
1078 result = ISC_R_NOMEMORY;
1079
1080 if (result == ISC_R_SUCCESS) {
1081 listener->controls = cp;
1082 listener->mctx = mctx;
1083 listener->task = cp->server->task;
1084 listener->address = *addr;
1085 listener->sock = NULL;
1086 listener->listening = ISC_FALSE;
1087 listener->exiting = ISC_FALSE;
1088 listener->acl = NULL;
1089 listener->type = type;
1090 listener->perm = 0;
1091 listener->owner = 0;
1092 listener->group = 0;
1093 ISC_LINK_INIT(listener, link);
1094 ISC_LIST_INIT(listener->keys);
1095 ISC_LIST_INIT(listener->connections);
1096
1097 /*
1098 * Make the acl.
1099 */
1100 if (control != NULL && type == isc_sockettype_tcp) {
1101 allow = cfg_tuple_get(control, "allow");
1102 result = cfg_acl_fromconfig(allow, config, ns_g_lctx,
1103 aclconfctx, mctx, &new_acl);
1104 } else {
1105 result = dns_acl_any(mctx, &new_acl);
1106 }
1107 }
1108
1109 if (result == ISC_R_SUCCESS) {
1110 dns_acl_attach(new_acl, &listener->acl);
1111 dns_acl_detach(&new_acl);
1112
1113 if (config != NULL)
1114 get_key_info(config, control, &global_keylist,
1115 &control_keylist);
1116
1117 if (control_keylist != NULL) {
1118 result = controlkeylist_fromcfg(control_keylist,
1119 listener->mctx,
1120 &listener->keys);
1121 if (result == ISC_R_SUCCESS)
1122 register_keys(control, global_keylist,
1123 &listener->keys,
1124 listener->mctx, socktext);
1125 } else
1126 result = get_rndckey(mctx, &listener->keys);
1127
1128 if (result != ISC_R_SUCCESS && control != NULL)
1129 cfg_obj_log(control, ns_g_lctx, ISC_LOG_WARNING,
1130 "couldn't install keys for "
1131 "command channel %s: %s",
1132 socktext, isc_result_totext(result));
1133 }
1134
1135 if (result == ISC_R_SUCCESS) {
1136 int pf = isc_sockaddr_pf(&listener->address);
1137 if ((pf == AF_INET && isc_net_probeipv4() != ISC_R_SUCCESS) ||
1138 #ifdef ISC_PLATFORM_HAVESYSUNH
1139 (pf == AF_UNIX && isc_net_probeunix() != ISC_R_SUCCESS) ||
1140 #endif
1141 (pf == AF_INET6 && isc_net_probeipv6() != ISC_R_SUCCESS))
1142 result = ISC_R_FAMILYNOSUPPORT;
1143 }
1144
1145 if (result == ISC_R_SUCCESS && type == isc_sockettype_unix)
1146 isc_socket_cleanunix(&listener->address, ISC_FALSE);
1147
1148 if (result == ISC_R_SUCCESS)
1149 result = isc_socket_create(ns_g_socketmgr,
1150 isc_sockaddr_pf(&listener->address),
1151 type, &listener->sock);
1152
1153 if (result == ISC_R_SUCCESS)
1154 result = isc_socket_bind(listener->sock, &listener->address,
1155 ISC_SOCKET_REUSEADDRESS);
1156
1157 if (result == ISC_R_SUCCESS && type == isc_sockettype_unix) {
1158 listener->perm = cfg_obj_asuint32(cfg_tuple_get(control,
1159 "perm"));
1160 listener->owner = cfg_obj_asuint32(cfg_tuple_get(control,
1161 "owner"));
1162 listener->group = cfg_obj_asuint32(cfg_tuple_get(control,
1163 "group"));
1164 result = isc_socket_permunix(&listener->address, listener->perm,
1165 listener->owner, listener->group);
1166 }
1167 if (result == ISC_R_SUCCESS)
1168 result = control_listen(listener);
1169
1170 if (result == ISC_R_SUCCESS)
1171 result = control_accept(listener);
1172
1173 if (result == ISC_R_SUCCESS) {
1174 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1175 NS_LOGMODULE_CONTROL, ISC_LOG_NOTICE,
1176 "command channel listening on %s", socktext);
1177 *listenerp = listener;
1178
1179 } else {
1180 if (listener != NULL) {
1181 listener->exiting = ISC_TRUE;
1182 free_listener(listener);
1183 }
1184
1185 if (control != NULL)
1186 cfg_obj_log(control, ns_g_lctx, ISC_LOG_WARNING,
1187 "couldn't add command channel %s: %s",
1188 socktext, isc_result_totext(result));
1189 else
1190 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1191 NS_LOGMODULE_CONTROL, ISC_LOG_NOTICE,
1192 "couldn't add command channel %s: %s",
1193 socktext, isc_result_totext(result));
1194
1195 *listenerp = NULL;
1196 }
1197
1198 /* XXXDCL return error results? fail hard? */
1199 }
1200
1201 isc_result_t
1202 ns_controls_configure(ns_controls_t *cp, const cfg_obj_t *config,
1203 cfg_aclconfctx_t *aclconfctx)
1204 {
1205 controllistener_t *listener;
1206 controllistenerlist_t new_listeners;
1207 const cfg_obj_t *controlslist = NULL;
1208 const cfg_listelt_t *element, *element2;
1209 char socktext[ISC_SOCKADDR_FORMATSIZE];
1210
1211 ISC_LIST_INIT(new_listeners);
1212
1213 /*
1214 * Get the list of named.conf 'controls' statements.
1215 */
1216 (void)cfg_map_get(config, "controls", &controlslist);
1217
1218 /*
1219 * Run through the new control channel list, noting sockets that
1220 * are already being listened on and moving them to the new list.
1221 *
1222 * Identifying duplicate addr/port combinations is left to either
1223 * the underlying config code, or to the bind attempt getting an
1224 * address-in-use error.
1225 */
1226 if (controlslist != NULL) {
1227 for (element = cfg_list_first(controlslist);
1228 element != NULL;
1229 element = cfg_list_next(element)) {
1230 const cfg_obj_t *controls;
1231 const cfg_obj_t *inetcontrols = NULL;
1232
1233 controls = cfg_listelt_value(element);
1234 (void)cfg_map_get(controls, "inet", &inetcontrols);
1235 if (inetcontrols == NULL)
1236 continue;
1237
1238 for (element2 = cfg_list_first(inetcontrols);
1239 element2 != NULL;
1240 element2 = cfg_list_next(element2)) {
1241 const cfg_obj_t *control;
1242 const cfg_obj_t *obj;
1243 isc_sockaddr_t addr;
1244
1245 /*
1246 * The parser handles BIND 8 configuration file
1247 * syntax, so it allows unix phrases as well
1248 * inet phrases with no keys{} clause.
1249 */
1250 control = cfg_listelt_value(element2);
1251
1252 obj = cfg_tuple_get(control, "address");
1253 addr = *cfg_obj_assockaddr(obj);
1254 if (isc_sockaddr_getport(&addr) == 0)
1255 isc_sockaddr_setport(&addr,
1256 NS_CONTROL_PORT);
1257
1258 isc_sockaddr_format(&addr, socktext,
1259 sizeof(socktext));
1260
1261 isc_log_write(ns_g_lctx,
1262 NS_LOGCATEGORY_GENERAL,
1263 NS_LOGMODULE_CONTROL,
1264 ISC_LOG_DEBUG(9),
1265 "processing control channel %s",
1266 socktext);
1267
1268 update_listener(cp, &listener, control, config,
1269 &addr, aclconfctx, socktext,
1270 isc_sockettype_tcp);
1271
1272 if (listener != NULL)
1273 /*
1274 * Remove the listener from the old
1275 * list, so it won't be shut down.
1276 */
1277 ISC_LIST_UNLINK(cp->listeners,
1278 listener, link);
1279 else
1280 /*
1281 * This is a new listener.
1282 */
1283 add_listener(cp, &listener, control,
1284 config, &addr, aclconfctx,
1285 socktext,
1286 isc_sockettype_tcp);
1287
1288 if (listener != NULL)
1289 ISC_LIST_APPEND(new_listeners,
1290 listener, link);
1291 }
1292 }
1293 for (element = cfg_list_first(controlslist);
1294 element != NULL;
1295 element = cfg_list_next(element)) {
1296 const cfg_obj_t *controls;
1297 const cfg_obj_t *unixcontrols = NULL;
1298
1299 controls = cfg_listelt_value(element);
1300 (void)cfg_map_get(controls, "unix", &unixcontrols);
1301 if (unixcontrols == NULL)
1302 continue;
1303
1304 for (element2 = cfg_list_first(unixcontrols);
1305 element2 != NULL;
1306 element2 = cfg_list_next(element2)) {
1307 const cfg_obj_t *control;
1308 const cfg_obj_t *path;
1309 isc_sockaddr_t addr;
1310 isc_result_t result;
1311
1312 /*
1313 * The parser handles BIND 8 configuration file
1314 * syntax, so it allows unix phrases as well
1315 * inet phrases with no keys{} clause.
1316 */
1317 control = cfg_listelt_value(element2);
1318
1319 path = cfg_tuple_get(control, "path");
1320 result = isc_sockaddr_frompath(&addr,
1321 cfg_obj_asstring(path));
1322 if (result != ISC_R_SUCCESS) {
1323 isc_log_write(ns_g_lctx,
1324 NS_LOGCATEGORY_GENERAL,
1325 NS_LOGMODULE_CONTROL,
1326 ISC_LOG_DEBUG(9),
1327 "control channel '%s': %s",
1328 cfg_obj_asstring(path),
1329 isc_result_totext(result));
1330 continue;
1331 }
1332
1333 isc_log_write(ns_g_lctx,
1334 NS_LOGCATEGORY_GENERAL,
1335 NS_LOGMODULE_CONTROL,
1336 ISC_LOG_DEBUG(9),
1337 "processing control channel '%s'",
1338 cfg_obj_asstring(path));
1339
1340 update_listener(cp, &listener, control, config,
1341 &addr, aclconfctx,
1342 cfg_obj_asstring(path),
1343 isc_sockettype_unix);
1344
1345 if (listener != NULL)
1346 /*
1347 * Remove the listener from the old
1348 * list, so it won't be shut down.
1349 */
1350 ISC_LIST_UNLINK(cp->listeners,
1351 listener, link);
1352 else
1353 /*
1354 * This is a new listener.
1355 */
1356 add_listener(cp, &listener, control,
1357 config, &addr, aclconfctx,
1358 cfg_obj_asstring(path),
1359 isc_sockettype_unix);
1360
1361 if (listener != NULL)
1362 ISC_LIST_APPEND(new_listeners,
1363 listener, link);
1364 }
1365 }
1366 } else {
1367 int i;
1368
1369 for (i = 0; i < 2; i++) {
1370 isc_sockaddr_t addr;
1371
1372 if (i == 0) {
1373 struct in_addr localhost;
1374
1375 if (isc_net_probeipv4() != ISC_R_SUCCESS)
1376 continue;
1377 localhost.s_addr = htonl(INADDR_LOOPBACK);
1378 isc_sockaddr_fromin(&addr, &localhost, 0);
1379 } else {
1380 if (isc_net_probeipv6() != ISC_R_SUCCESS)
1381 continue;
1382 isc_sockaddr_fromin6(&addr,
1383 &in6addr_loopback, 0);
1384 }
1385 isc_sockaddr_setport(&addr, NS_CONTROL_PORT);
1386
1387 isc_sockaddr_format(&addr, socktext, sizeof(socktext));
1388
1389 update_listener(cp, &listener, NULL, NULL,
1390 &addr, NULL, socktext,
1391 isc_sockettype_tcp);
1392
1393 if (listener != NULL)
1394 /*
1395 * Remove the listener from the old
1396 * list, so it won't be shut down.
1397 */
1398 ISC_LIST_UNLINK(cp->listeners,
1399 listener, link);
1400 else
1401 /*
1402 * This is a new listener.
1403 */
1404 add_listener(cp, &listener, NULL, NULL,
1405 &addr, NULL, socktext,
1406 isc_sockettype_tcp);
1407
1408 if (listener != NULL)
1409 ISC_LIST_APPEND(new_listeners,
1410 listener, link);
1411 }
1412 }
1413
1414 /*
1415 * ns_control_shutdown() will stop whatever is on the global
1416 * listeners list, which currently only has whatever sockaddrs
1417 * were in the previous configuration (if any) that do not
1418 * remain in the current configuration.
1419 */
1420 controls_shutdown(cp);
1421
1422 /*
1423 * Put all of the valid listeners on the listeners list.
1424 * Anything already on listeners in the process of shutting
1425 * down will be taken care of by listen_done().
1426 */
1427 ISC_LIST_APPENDLIST(cp->listeners, new_listeners, link);
1428 return (ISC_R_SUCCESS);
1429 }
1430
1431 isc_result_t
1432 ns_controls_create(ns_server_t *server, ns_controls_t **ctrlsp) {
1433 isc_mem_t *mctx = server->mctx;
1434 isc_result_t result;
1435 ns_controls_t *controls = isc_mem_get(mctx, sizeof(*controls));
1436
1437 if (controls == NULL)
1438 return (ISC_R_NOMEMORY);
1439 controls->server = server;
1440 ISC_LIST_INIT(controls->listeners);
1441 controls->shuttingdown = ISC_FALSE;
1442 controls->symtab = NULL;
1443 result = isccc_cc_createsymtab(&controls->symtab);
1444 if (result != ISC_R_SUCCESS) {
1445 isc_mem_put(server->mctx, controls, sizeof(*controls));
1446 return (result);
1447 }
1448 *ctrlsp = controls;
1449 return (ISC_R_SUCCESS);
1450 }
1451
1452 void
1453 ns_controls_destroy(ns_controls_t **ctrlsp) {
1454 ns_controls_t *controls = *ctrlsp;
1455
1456 REQUIRE(ISC_LIST_EMPTY(controls->listeners));
1457
1458 isccc_symtab_destroy(&controls->symtab);
1459 isc_mem_put(controls->server->mctx, controls, sizeof(*controls));
1460 *ctrlsp = NULL;
1461 }
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