2 * services/authzone.c - authoritative zone that is locally hosted.
4 * Copyright (c) 2017, NLnet Labs. All rights reserved.
6 * This software is open source.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
19 * Neither the name of the NLNET LABS nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 * This file contains the functions for an authority zone. This zone
40 * is queried by the iterator, just like a stub or forward zone, but then
41 * the data is locally held.
45 #include "services/authzone.h"
46 #include "util/data/dname.h"
47 #include "util/data/msgparse.h"
48 #include "util/data/msgreply.h"
49 #include "util/data/msgencode.h"
50 #include "util/data/packed_rrset.h"
51 #include "util/regional.h"
52 #include "util/net_help.h"
53 #include "util/netevent.h"
54 #include "util/config_file.h"
56 #include "util/module.h"
57 #include "util/random.h"
58 #include "services/cache/dns.h"
59 #include "services/outside_network.h"
60 #include "services/listen_dnsport.h"
61 #include "services/mesh.h"
62 #include "sldns/rrdef.h"
63 #include "sldns/pkthdr.h"
64 #include "sldns/sbuffer.h"
65 #include "sldns/str2wire.h"
66 #include "sldns/wire2str.h"
67 #include "sldns/parseutil.h"
68 #include "sldns/keyraw.h"
69 #include "validator/val_nsec3.h"
70 #include "validator/val_secalgo.h"
73 /** bytes to use for NSEC3 hash buffer. 20 for sha1 */
74 #define N3HASHBUFLEN 32
75 /** max number of CNAMEs we are willing to follow (in one answer) */
76 #define MAX_CNAME_CHAIN 8
77 /** timeout for probe packets for SOA */
78 #define AUTH_PROBE_TIMEOUT 100 /* msec */
79 /** when to stop with SOA probes (when exponential timeouts exceed this) */
80 #define AUTH_PROBE_TIMEOUT_STOP 1000 /* msec */
81 /* auth transfer timeout for TCP connections, in msec */
82 #define AUTH_TRANSFER_TIMEOUT 10000 /* msec */
83 /* auth transfer max backoff for failed tranfers and probes */
84 #define AUTH_TRANSFER_MAX_BACKOFF 86400 /* sec */
85 /* auth http port number */
86 #define AUTH_HTTP_PORT 80
87 /* auth https port number */
88 #define AUTH_HTTPS_PORT 443
89 /* max depth for nested $INCLUDEs */
90 #define MAX_INCLUDE_DEPTH 10
91 /** number of timeouts before we fallback from IXFR to AXFR,
92 * because some versions of servers (eg. dnsmasq) drop IXFR packets. */
93 #define NUM_TIMEOUTS_FALLBACK_IXFR 3
95 /** pick up nextprobe task to start waiting to perform transfer actions */
96 static void xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
97 int failure, int lookup_only);
98 /** move to sending the probe packets, next if fails. task_probe */
99 static void xfr_probe_send_or_end(struct auth_xfer* xfr,
100 struct module_env* env);
101 /** pick up probe task with specified(or NULL) destination first,
102 * or transfer task if nothing to probe, or false if already in progress */
103 static int xfr_start_probe(struct auth_xfer* xfr, struct module_env* env,
104 struct auth_master* spec);
105 /** delete xfer structure (not its tree entry) */
106 static void auth_xfer_delete(struct auth_xfer* xfr);
108 /** create new dns_msg */
109 static struct dns_msg*
110 msg_create(struct regional* region, struct query_info* qinfo)
112 struct dns_msg* msg = (struct dns_msg*)regional_alloc(region,
113 sizeof(struct dns_msg));
116 msg->qinfo.qname = regional_alloc_init(region, qinfo->qname,
118 if(!msg->qinfo.qname)
120 msg->qinfo.qname_len = qinfo->qname_len;
121 msg->qinfo.qtype = qinfo->qtype;
122 msg->qinfo.qclass = qinfo->qclass;
123 msg->qinfo.local_alias = NULL;
124 /* non-packed reply_info, because it needs to grow the array */
125 msg->rep = (struct reply_info*)regional_alloc_zero(region,
126 sizeof(struct reply_info)-sizeof(struct rrset_ref));
129 msg->rep->flags = (uint16_t)(BIT_QR | BIT_AA);
130 msg->rep->authoritative = 1;
131 msg->rep->qdcount = 1;
132 /* rrsets is NULL, no rrsets yet */
136 /** grow rrset array by one in msg */
138 msg_grow_array(struct regional* region, struct dns_msg* msg)
140 if(msg->rep->rrsets == NULL) {
141 msg->rep->rrsets = regional_alloc_zero(region,
142 sizeof(struct ub_packed_rrset_key*)*(msg->rep->rrset_count+1));
143 if(!msg->rep->rrsets)
146 struct ub_packed_rrset_key** rrsets_old = msg->rep->rrsets;
147 msg->rep->rrsets = regional_alloc_zero(region,
148 sizeof(struct ub_packed_rrset_key*)*(msg->rep->rrset_count+1));
149 if(!msg->rep->rrsets)
151 memmove(msg->rep->rrsets, rrsets_old,
152 sizeof(struct ub_packed_rrset_key*)*msg->rep->rrset_count);
157 /** get ttl of rrset */
159 get_rrset_ttl(struct ub_packed_rrset_key* k)
161 struct packed_rrset_data* d = (struct packed_rrset_data*)
166 /** Copy rrset into region from domain-datanode and packet rrset */
167 static struct ub_packed_rrset_key*
168 auth_packed_rrset_copy_region(struct auth_zone* z, struct auth_data* node,
169 struct auth_rrset* rrset, struct regional* region, time_t adjust)
171 struct ub_packed_rrset_key key;
172 memset(&key, 0, sizeof(key));
173 key.entry.key = &key;
174 key.entry.data = rrset->data;
175 key.rk.dname = node->name;
176 key.rk.dname_len = node->namelen;
177 key.rk.type = htons(rrset->type);
178 key.rk.rrset_class = htons(z->dclass);
179 key.entry.hash = rrset_key_hash(&key.rk);
180 return packed_rrset_copy_region(&key, region, adjust);
183 /** fix up msg->rep TTL and prefetch ttl */
185 msg_ttl(struct dns_msg* msg)
187 if(msg->rep->rrset_count == 0) return;
188 if(msg->rep->rrset_count == 1) {
189 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[0]);
190 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
191 msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
192 } else if(get_rrset_ttl(msg->rep->rrsets[msg->rep->rrset_count-1]) <
194 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[
195 msg->rep->rrset_count-1]);
196 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
197 msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
201 /** see if rrset is a duplicate in the answer message */
203 msg_rrset_duplicate(struct dns_msg* msg, uint8_t* nm, size_t nmlen,
204 uint16_t type, uint16_t dclass)
207 for(i=0; i<msg->rep->rrset_count; i++) {
208 struct ub_packed_rrset_key* k = msg->rep->rrsets[i];
209 if(ntohs(k->rk.type) == type && k->rk.dname_len == nmlen &&
210 ntohs(k->rk.rrset_class) == dclass &&
211 query_dname_compare(k->rk.dname, nm) == 0)
217 /** add rrset to answer section (no auth, add rrsets yet) */
219 msg_add_rrset_an(struct auth_zone* z, struct regional* region,
220 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
222 log_assert(msg->rep->ns_numrrsets == 0);
223 log_assert(msg->rep->ar_numrrsets == 0);
226 if(msg_rrset_duplicate(msg, node->name, node->namelen, rrset->type,
230 if(!msg_grow_array(region, msg))
233 if(!(msg->rep->rrsets[msg->rep->rrset_count] =
234 auth_packed_rrset_copy_region(z, node, rrset, region, 0)))
236 msg->rep->rrset_count++;
237 msg->rep->an_numrrsets++;
242 /** add rrset to authority section (no additonal section rrsets yet) */
244 msg_add_rrset_ns(struct auth_zone* z, struct regional* region,
245 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
247 log_assert(msg->rep->ar_numrrsets == 0);
250 if(msg_rrset_duplicate(msg, node->name, node->namelen, rrset->type,
254 if(!msg_grow_array(region, msg))
257 if(!(msg->rep->rrsets[msg->rep->rrset_count] =
258 auth_packed_rrset_copy_region(z, node, rrset, region, 0)))
260 msg->rep->rrset_count++;
261 msg->rep->ns_numrrsets++;
266 /** add rrset to additional section */
268 msg_add_rrset_ar(struct auth_zone* z, struct regional* region,
269 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
273 if(msg_rrset_duplicate(msg, node->name, node->namelen, rrset->type,
277 if(!msg_grow_array(region, msg))
280 if(!(msg->rep->rrsets[msg->rep->rrset_count] =
281 auth_packed_rrset_copy_region(z, node, rrset, region, 0)))
283 msg->rep->rrset_count++;
284 msg->rep->ar_numrrsets++;
289 struct auth_zones* auth_zones_create(void)
291 struct auth_zones* az = (struct auth_zones*)calloc(1, sizeof(*az));
293 log_err("out of memory");
296 rbtree_init(&az->ztree, &auth_zone_cmp);
297 rbtree_init(&az->xtree, &auth_xfer_cmp);
298 lock_rw_init(&az->lock);
299 lock_protect(&az->lock, &az->ztree, sizeof(az->ztree));
300 lock_protect(&az->lock, &az->xtree, sizeof(az->xtree));
301 /* also lock protects the rbnode's in struct auth_zone, auth_xfer */
302 lock_rw_init(&az->rpz_lock);
303 lock_protect(&az->rpz_lock, &az->rpz_first, sizeof(az->rpz_first));
307 int auth_zone_cmp(const void* z1, const void* z2)
309 /* first sort on class, so that hierarchy can be maintained within
311 struct auth_zone* a = (struct auth_zone*)z1;
312 struct auth_zone* b = (struct auth_zone*)z2;
314 if(a->dclass != b->dclass) {
315 if(a->dclass < b->dclass)
319 /* sorted such that higher zones sort before lower zones (their
321 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
324 int auth_data_cmp(const void* z1, const void* z2)
326 struct auth_data* a = (struct auth_data*)z1;
327 struct auth_data* b = (struct auth_data*)z2;
329 /* canonical sort, because DNSSEC needs that */
330 return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
334 int auth_xfer_cmp(const void* z1, const void* z2)
336 /* first sort on class, so that hierarchy can be maintained within
338 struct auth_xfer* a = (struct auth_xfer*)z1;
339 struct auth_xfer* b = (struct auth_xfer*)z2;
341 if(a->dclass != b->dclass) {
342 if(a->dclass < b->dclass)
346 /* sorted such that higher zones sort before lower zones (their
348 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
351 /** delete auth rrset node */
353 auth_rrset_delete(struct auth_rrset* rrset)
360 /** delete auth data domain node */
362 auth_data_delete(struct auth_data* n)
364 struct auth_rrset* p, *np;
369 auth_rrset_delete(p);
376 /** helper traverse to delete zones */
378 auth_data_del(rbnode_type* n, void* ATTR_UNUSED(arg))
380 struct auth_data* z = (struct auth_data*)n->key;
384 /** delete an auth zone structure (tree remove must be done elsewhere) */
386 auth_zone_delete(struct auth_zone* z, struct auth_zones* az)
389 lock_rw_destroy(&z->lock);
390 traverse_postorder(&z->data, auth_data_del, NULL);
393 /* keep RPZ linked list intact */
394 lock_rw_wrlock(&az->rpz_lock);
396 z->rpz->prev->next = z->rpz->next;
398 az->rpz_first = z->rpz->next;
400 z->rpz->next->prev = z->rpz->prev;
401 lock_rw_unlock(&az->rpz_lock);
411 auth_zone_create(struct auth_zones* az, uint8_t* nm, size_t nmlen,
414 struct auth_zone* z = (struct auth_zone*)calloc(1, sizeof(*z));
421 z->namelabs = dname_count_labels(nm);
422 z->name = memdup(nm, nmlen);
427 rbtree_init(&z->data, &auth_data_cmp);
428 lock_rw_init(&z->lock);
429 lock_protect(&z->lock, &z->name, sizeof(*z)-sizeof(rbnode_type));
430 lock_rw_wrlock(&z->lock);
431 /* z lock protects all, except rbtree itself, which is az->lock */
432 if(!rbtree_insert(&az->ztree, &z->node)) {
433 lock_rw_unlock(&z->lock);
434 auth_zone_delete(z, NULL);
435 log_warn("duplicate auth zone");
442 auth_zone_find(struct auth_zones* az, uint8_t* nm, size_t nmlen,
445 struct auth_zone key;
450 key.namelabs = dname_count_labels(nm);
451 return (struct auth_zone*)rbtree_search(&az->ztree, &key);
455 auth_xfer_find(struct auth_zones* az, uint8_t* nm, size_t nmlen,
458 struct auth_xfer key;
463 key.namelabs = dname_count_labels(nm);
464 return (struct auth_xfer*)rbtree_search(&az->xtree, &key);
467 /** find an auth zone or sorted less-or-equal, return true if exact */
469 auth_zone_find_less_equal(struct auth_zones* az, uint8_t* nm, size_t nmlen,
470 uint16_t dclass, struct auth_zone** z)
472 struct auth_zone key;
477 key.namelabs = dname_count_labels(nm);
478 return rbtree_find_less_equal(&az->ztree, &key, (rbnode_type**)z);
482 /** find the auth zone that is above the given name */
484 auth_zones_find_zone(struct auth_zones* az, uint8_t* name, size_t name_len,
488 size_t nmlen = name_len;
490 if(auth_zone_find_less_equal(az, nm, nmlen, dclass, &z)) {
494 /* less-or-nothing */
495 if(!z) return NULL; /* nothing smaller, nothing above it */
496 /* we found smaller name; smaller may be above the name,
497 * but not below it. */
498 nm = dname_get_shared_topdomain(z->name, name);
499 dname_count_size_labels(nm, &nmlen);
505 z = auth_zone_find(az, nm, nmlen, dclass);
507 if(dname_is_root(nm)) break;
508 dname_remove_label(&nm, &nmlen);
513 /** find or create zone with name str. caller must have lock on az.
514 * returns a wrlocked zone */
515 static struct auth_zone*
516 auth_zones_find_or_add_zone(struct auth_zones* az, char* name)
518 uint8_t nm[LDNS_MAX_DOMAINLEN+1];
519 size_t nmlen = sizeof(nm);
522 if(sldns_str2wire_dname_buf(name, nm, &nmlen) != 0) {
523 log_err("cannot parse auth zone name: %s", name);
526 z = auth_zone_find(az, nm, nmlen, LDNS_RR_CLASS_IN);
528 /* not found, create the zone */
529 z = auth_zone_create(az, nm, nmlen, LDNS_RR_CLASS_IN);
531 lock_rw_wrlock(&z->lock);
536 /** find or create xfer zone with name str. caller must have lock on az.
537 * returns a locked xfer */
538 static struct auth_xfer*
539 auth_zones_find_or_add_xfer(struct auth_zones* az, struct auth_zone* z)
542 x = auth_xfer_find(az, z->name, z->namelen, z->dclass);
544 /* not found, create the zone */
545 x = auth_xfer_create(az, z);
547 lock_basic_lock(&x->lock);
553 auth_zone_set_zonefile(struct auth_zone* z, char* zonefile)
555 if(z->zonefile) free(z->zonefile);
556 if(zonefile == NULL) {
559 z->zonefile = strdup(zonefile);
561 log_err("malloc failure");
568 /** set auth zone fallback. caller must have lock on zone */
570 auth_zone_set_fallback(struct auth_zone* z, char* fallbackstr)
572 if(strcmp(fallbackstr, "yes") != 0 && strcmp(fallbackstr, "no") != 0){
573 log_err("auth zone fallback, expected yes or no, got %s",
577 z->fallback_enabled = (strcmp(fallbackstr, "yes")==0);
581 /** create domain with the given name */
582 static struct auth_data*
583 az_domain_create(struct auth_zone* z, uint8_t* nm, size_t nmlen)
585 struct auth_data* n = (struct auth_data*)malloc(sizeof(*n));
587 memset(n, 0, sizeof(*n));
589 n->name = memdup(nm, nmlen);
595 n->namelabs = dname_count_labels(nm);
596 if(!rbtree_insert(&z->data, &n->node)) {
597 log_warn("duplicate auth domain name");
605 /** find domain with exactly the given name */
606 static struct auth_data*
607 az_find_name(struct auth_zone* z, uint8_t* nm, size_t nmlen)
609 struct auth_zone key;
613 key.namelabs = dname_count_labels(nm);
614 return (struct auth_data*)rbtree_search(&z->data, &key);
617 /** Find domain name (or closest match) */
619 az_find_domain(struct auth_zone* z, struct query_info* qinfo, int* node_exact,
620 struct auth_data** node)
622 struct auth_zone key;
624 key.name = qinfo->qname;
625 key.namelen = qinfo->qname_len;
626 key.namelabs = dname_count_labels(key.name);
627 *node_exact = rbtree_find_less_equal(&z->data, &key,
628 (rbnode_type**)node);
631 /** find or create domain with name in zone */
632 static struct auth_data*
633 az_domain_find_or_create(struct auth_zone* z, uint8_t* dname,
636 struct auth_data* n = az_find_name(z, dname, dname_len);
638 n = az_domain_create(z, dname, dname_len);
643 /** find rrset of given type in the domain */
644 static struct auth_rrset*
645 az_domain_rrset(struct auth_data* n, uint16_t t)
647 struct auth_rrset* rrset;
658 /** remove rrset of this type from domain */
660 domain_remove_rrset(struct auth_data* node, uint16_t rr_type)
662 struct auth_rrset* rrset, *prev;
665 rrset = node->rrsets;
667 if(rrset->type == rr_type) {
668 /* found it, now delete it */
669 if(prev) prev->next = rrset->next;
670 else node->rrsets = rrset->next;
671 auth_rrset_delete(rrset);
679 /** find an rrsig index in the rrset. returns true if found */
681 az_rrset_find_rrsig(struct packed_rrset_data* d, uint8_t* rdata, size_t len,
685 for(i=d->count; i<d->count + d->rrsig_count; i++) {
686 if(d->rr_len[i] != len)
688 if(memcmp(d->rr_data[i], rdata, len) == 0) {
696 /** see if rdata is duplicate */
698 rdata_duplicate(struct packed_rrset_data* d, uint8_t* rdata, size_t len)
701 for(i=0; i<d->count + d->rrsig_count; i++) {
702 if(d->rr_len[i] != len)
704 if(memcmp(d->rr_data[i], rdata, len) == 0)
710 /** get rrsig type covered from rdata.
711 * @param rdata: rdata in wireformat, starting with 16bit rdlength.
712 * @param rdatalen: length of rdata buffer.
713 * @return type covered (or 0).
716 rrsig_rdata_get_type_covered(uint8_t* rdata, size_t rdatalen)
720 return sldns_read_uint16(rdata+2);
723 /** remove RR from existing RRset. Also sig, if it is a signature.
724 * reallocates the packed rrset for a new one, false on alloc failure */
726 rrset_remove_rr(struct auth_rrset* rrset, size_t index)
728 struct packed_rrset_data* d, *old = rrset->data;
730 if(index >= old->count + old->rrsig_count)
731 return 0; /* index out of bounds */
732 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old) - (
733 sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t) +
734 old->rr_len[index]));
736 log_err("malloc failure");
740 d->count = old->count;
741 d->rrsig_count = old->rrsig_count;
742 if(index < d->count) d->count--;
743 else d->rrsig_count--;
744 d->trust = old->trust;
745 d->security = old->security;
747 /* set rr_len, needed for ptr_fixup */
748 d->rr_len = (size_t*)((uint8_t*)d +
749 sizeof(struct packed_rrset_data));
751 memmove(d->rr_len, old->rr_len, (index)*sizeof(size_t));
752 if(index+1 < old->count+old->rrsig_count)
753 memmove(&d->rr_len[index], &old->rr_len[index+1],
754 (old->count+old->rrsig_count - (index+1))*sizeof(size_t));
755 packed_rrset_ptr_fixup(d);
759 memmove(d->rr_ttl, old->rr_ttl, (index)*sizeof(time_t));
760 if(index+1 < old->count+old->rrsig_count)
761 memmove(&d->rr_ttl[index], &old->rr_ttl[index+1],
762 (old->count+old->rrsig_count - (index+1))*sizeof(time_t));
764 /* move over rr_data */
765 for(i=0; i<d->count+d->rrsig_count; i++) {
767 if(i < index) oldi = i;
769 memmove(d->rr_data[i], old->rr_data[oldi], d->rr_len[i]);
772 /* recalc ttl (lowest of remaining RR ttls) */
773 if(d->count + d->rrsig_count > 0)
774 d->ttl = d->rr_ttl[0];
775 for(i=0; i<d->count+d->rrsig_count; i++) {
776 if(d->rr_ttl[i] < d->ttl)
777 d->ttl = d->rr_ttl[i];
785 /** add RR to existing RRset. If insert_sig is true, add to rrsigs.
786 * This reallocates the packed rrset for a new one */
788 rrset_add_rr(struct auth_rrset* rrset, uint32_t rr_ttl, uint8_t* rdata,
789 size_t rdatalen, int insert_sig)
791 struct packed_rrset_data* d, *old = rrset->data;
792 size_t total, old_total;
794 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old)
795 + sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t)
798 log_err("out of memory");
801 /* copy base values */
802 memcpy(d, old, sizeof(struct packed_rrset_data));
808 old_total = old->count + old->rrsig_count;
809 total = d->count + d->rrsig_count;
810 /* set rr_len, needed for ptr_fixup */
811 d->rr_len = (size_t*)((uint8_t*)d +
812 sizeof(struct packed_rrset_data));
814 memmove(d->rr_len, old->rr_len, old->count*sizeof(size_t));
815 if(old->rrsig_count != 0)
816 memmove(d->rr_len+d->count, old->rr_len+old->count,
817 old->rrsig_count*sizeof(size_t));
819 d->rr_len[d->count-1] = rdatalen;
820 else d->rr_len[total-1] = rdatalen;
821 packed_rrset_ptr_fixup(d);
822 if((time_t)rr_ttl < d->ttl)
825 /* copy old values into new array */
826 if(old->count != 0) {
827 memmove(d->rr_ttl, old->rr_ttl, old->count*sizeof(time_t));
828 /* all the old rr pieces are allocated sequential, so we
829 * can copy them in one go */
830 memmove(d->rr_data[0], old->rr_data[0],
831 (old->rr_data[old->count-1] - old->rr_data[0]) +
832 old->rr_len[old->count-1]);
834 if(old->rrsig_count != 0) {
835 memmove(d->rr_ttl+d->count, old->rr_ttl+old->count,
836 old->rrsig_count*sizeof(time_t));
837 memmove(d->rr_data[d->count], old->rr_data[old->count],
838 (old->rr_data[old_total-1] - old->rr_data[old->count]) +
839 old->rr_len[old_total-1]);
842 /* insert new value */
844 d->rr_ttl[d->count-1] = rr_ttl;
845 memmove(d->rr_data[d->count-1], rdata, rdatalen);
847 d->rr_ttl[total-1] = rr_ttl;
848 memmove(d->rr_data[total-1], rdata, rdatalen);
856 /** Create new rrset for node with packed rrset with one RR element */
857 static struct auth_rrset*
858 rrset_create(struct auth_data* node, uint16_t rr_type, uint32_t rr_ttl,
859 uint8_t* rdata, size_t rdatalen)
861 struct auth_rrset* rrset = (struct auth_rrset*)calloc(1,
863 struct auth_rrset* p, *prev;
864 struct packed_rrset_data* d;
866 log_err("out of memory");
869 rrset->type = rr_type;
871 /* the rrset data structure, with one RR */
872 d = (struct packed_rrset_data*)calloc(1,
873 sizeof(struct packed_rrset_data) + sizeof(size_t) +
874 sizeof(uint8_t*) + sizeof(time_t) + rdatalen);
877 log_err("out of memory");
882 d->trust = rrset_trust_prim_noglue;
883 d->rr_len = (size_t*)((uint8_t*)d + sizeof(struct packed_rrset_data));
884 d->rr_data = (uint8_t**)&(d->rr_len[1]);
885 d->rr_ttl = (time_t*)&(d->rr_data[1]);
886 d->rr_data[0] = (uint8_t*)&(d->rr_ttl[1]);
889 d->rr_len[0] = rdatalen;
890 d->rr_ttl[0] = rr_ttl;
891 memmove(d->rr_data[0], rdata, rdatalen);
894 /* insert rrset into linked list for domain */
895 /* find sorted place to link the rrset into the list */
898 while(p && p->type<=rr_type) {
902 /* so, prev is smaller, and p is larger than rr_type */
904 if(prev) prev->next = rrset;
905 else node->rrsets = rrset;
909 /** count number (and size) of rrsigs that cover a type */
911 rrsig_num_that_cover(struct auth_rrset* rrsig, uint16_t rr_type, size_t* sigsz)
913 struct packed_rrset_data* d = rrsig->data;
916 log_assert(d && rrsig->type == LDNS_RR_TYPE_RRSIG);
917 for(i=0; i<d->count+d->rrsig_count; i++) {
918 if(rrsig_rdata_get_type_covered(d->rr_data[i],
919 d->rr_len[i]) == rr_type) {
921 (*sigsz) += d->rr_len[i];
927 /** See if rrsig set has covered sigs for rrset and move them over */
929 rrset_moveover_rrsigs(struct auth_data* node, uint16_t rr_type,
930 struct auth_rrset* rrset, struct auth_rrset* rrsig)
932 size_t sigs, sigsz, i, j, total;
933 struct packed_rrset_data* sigold = rrsig->data;
934 struct packed_rrset_data* old = rrset->data;
935 struct packed_rrset_data* d, *sigd;
937 log_assert(rrset->type == rr_type);
938 log_assert(rrsig->type == LDNS_RR_TYPE_RRSIG);
939 sigs = rrsig_num_that_cover(rrsig, rr_type, &sigsz);
941 /* 0 rrsigs to move over, done */
945 /* allocate rrset sigsz larger for extra sigs elements, and
946 * allocate rrsig sigsz smaller for less sigs elements. */
947 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old)
948 + sigs*(sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t))
951 log_err("out of memory");
954 /* copy base values */
955 total = old->count + old->rrsig_count;
956 memcpy(d, old, sizeof(struct packed_rrset_data));
957 d->rrsig_count += sigs;
959 d->rr_len = (size_t*)((uint8_t*)d +
960 sizeof(struct packed_rrset_data));
962 memmove(d->rr_len, old->rr_len, total*sizeof(size_t));
963 j = d->count+d->rrsig_count-sigs;
964 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
965 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
966 sigold->rr_len[i]) == rr_type) {
967 d->rr_len[j] = sigold->rr_len[i];
971 packed_rrset_ptr_fixup(d);
973 /* copy old values into new array */
975 memmove(d->rr_ttl, old->rr_ttl, total*sizeof(time_t));
976 /* all the old rr pieces are allocated sequential, so we
977 * can copy them in one go */
978 memmove(d->rr_data[0], old->rr_data[0],
979 (old->rr_data[total-1] - old->rr_data[0]) +
980 old->rr_len[total-1]);
983 /* move over the rrsigs to the larger rrset*/
984 j = d->count+d->rrsig_count-sigs;
985 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
986 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
987 sigold->rr_len[i]) == rr_type) {
988 /* move this one over to location j */
989 d->rr_ttl[j] = sigold->rr_ttl[i];
990 memmove(d->rr_data[j], sigold->rr_data[i],
992 if(d->rr_ttl[j] < d->ttl)
993 d->ttl = d->rr_ttl[j];
998 /* put it in and deallocate the old rrset */
1002 /* now make rrsig set smaller */
1003 if(sigold->count+sigold->rrsig_count == sigs) {
1004 /* remove all sigs from rrsig, remove it entirely */
1005 domain_remove_rrset(node, LDNS_RR_TYPE_RRSIG);
1008 log_assert(packed_rrset_sizeof(sigold) > sigs*(sizeof(size_t) +
1009 sizeof(uint8_t*) + sizeof(time_t)) + sigsz);
1010 sigd = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(sigold)
1011 - sigs*(sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t))
1014 /* no need to free up d, it has already been placed in the
1015 * node->rrset structure */
1016 log_err("out of memory");
1019 /* copy base values */
1020 memcpy(sigd, sigold, sizeof(struct packed_rrset_data));
1021 /* in sigd the RRSIGs are stored in the base of the RR, in count */
1022 sigd->count -= sigs;
1024 sigd->rr_len = (size_t*)((uint8_t*)sigd +
1025 sizeof(struct packed_rrset_data));
1027 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
1028 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
1029 sigold->rr_len[i]) != rr_type) {
1030 sigd->rr_len[j] = sigold->rr_len[i];
1034 packed_rrset_ptr_fixup(sigd);
1036 /* copy old values into new rrsig array */
1038 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
1039 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
1040 sigold->rr_len[i]) != rr_type) {
1041 /* move this one over to location j */
1042 sigd->rr_ttl[j] = sigold->rr_ttl[i];
1043 memmove(sigd->rr_data[j], sigold->rr_data[i],
1045 if(j==0) sigd->ttl = sigd->rr_ttl[j];
1047 if(sigd->rr_ttl[j] < sigd->ttl)
1048 sigd->ttl = sigd->rr_ttl[j];
1054 /* put it in and deallocate the old rrset */
1061 /** copy the rrsigs from the rrset to the rrsig rrset, because the rrset
1062 * is going to be deleted. reallocates the RRSIG rrset data. */
1064 rrsigs_copy_from_rrset_to_rrsigset(struct auth_rrset* rrset,
1065 struct auth_rrset* rrsigset)
1068 if(rrset->data->rrsig_count == 0)
1071 /* move them over one by one, because there might be duplicates,
1072 * duplicates are ignored */
1073 for(i=rrset->data->count;
1074 i<rrset->data->count+rrset->data->rrsig_count; i++) {
1075 uint8_t* rdata = rrset->data->rr_data[i];
1076 size_t rdatalen = rrset->data->rr_len[i];
1077 time_t rr_ttl = rrset->data->rr_ttl[i];
1079 if(rdata_duplicate(rrsigset->data, rdata, rdatalen)) {
1082 if(!rrset_add_rr(rrsigset, rr_ttl, rdata, rdatalen, 0))
1088 /** Add rr to node, ignores duplicate RRs,
1089 * rdata points to buffer with rdatalen octets, starts with 2bytelength. */
1091 az_domain_add_rr(struct auth_data* node, uint16_t rr_type, uint32_t rr_ttl,
1092 uint8_t* rdata, size_t rdatalen, int* duplicate)
1094 struct auth_rrset* rrset;
1095 /* packed rrsets have their rrsigs along with them, sort them out */
1096 if(rr_type == LDNS_RR_TYPE_RRSIG) {
1097 uint16_t ctype = rrsig_rdata_get_type_covered(rdata, rdatalen);
1098 if((rrset=az_domain_rrset(node, ctype))!= NULL) {
1099 /* a node of the correct type exists, add the RRSIG
1100 * to the rrset of the covered data type */
1101 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1102 if(duplicate) *duplicate = 1;
1105 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 1))
1107 } else if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1108 /* add RRSIG to rrset of type RRSIG */
1109 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1110 if(duplicate) *duplicate = 1;
1113 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 0))
1116 /* create rrset of type RRSIG */
1117 if(!rrset_create(node, rr_type, rr_ttl, rdata,
1122 /* normal RR type */
1123 if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1124 /* add data to existing node with data type */
1125 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1126 if(duplicate) *duplicate = 1;
1129 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 0))
1132 struct auth_rrset* rrsig;
1133 /* create new node with data type */
1134 if(!(rrset=rrset_create(node, rr_type, rr_ttl, rdata,
1138 /* see if node of type RRSIG has signatures that
1139 * cover the data type, and move them over */
1140 /* and then make the RRSIG type smaller */
1141 if((rrsig=az_domain_rrset(node, LDNS_RR_TYPE_RRSIG))
1143 if(!rrset_moveover_rrsigs(node, rr_type,
1152 /** insert RR into zone, ignore duplicates */
1154 az_insert_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
1155 size_t dname_len, int* duplicate)
1157 struct auth_data* node;
1158 uint8_t* dname = rr;
1159 uint16_t rr_type = sldns_wirerr_get_type(rr, rr_len, dname_len);
1160 uint16_t rr_class = sldns_wirerr_get_class(rr, rr_len, dname_len);
1161 uint32_t rr_ttl = sldns_wirerr_get_ttl(rr, rr_len, dname_len);
1162 size_t rdatalen = ((size_t)sldns_wirerr_get_rdatalen(rr, rr_len,
1164 /* rdata points to rdata prefixed with uint16 rdatalength */
1165 uint8_t* rdata = sldns_wirerr_get_rdatawl(rr, rr_len, dname_len);
1167 if(rr_class != z->dclass) {
1168 log_err("wrong class for RR");
1171 if(!(node=az_domain_find_or_create(z, dname, dname_len))) {
1172 log_err("cannot create domain");
1175 if(!az_domain_add_rr(node, rr_type, rr_ttl, rdata, rdatalen,
1177 log_err("cannot add RR to domain");
1181 if(!(rpz_insert_rr(z->rpz, z->namelen, dname, dname_len,
1182 rr_type, rr_class, rr_ttl, rdata, rdatalen, rr,
1189 /** Remove rr from node, ignores nonexisting RRs,
1190 * rdata points to buffer with rdatalen octets, starts with 2bytelength. */
1192 az_domain_remove_rr(struct auth_data* node, uint16_t rr_type,
1193 uint8_t* rdata, size_t rdatalen, int* nonexist)
1195 struct auth_rrset* rrset;
1198 /* find the plain RR of the given type */
1199 if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1200 if(packed_rrset_find_rr(rrset->data, rdata, rdatalen, &index)) {
1201 if(rrset->data->count == 1 &&
1202 rrset->data->rrsig_count == 0) {
1203 /* last RR, delete the rrset */
1204 domain_remove_rrset(node, rr_type);
1205 } else if(rrset->data->count == 1 &&
1206 rrset->data->rrsig_count != 0) {
1207 /* move RRSIGs to the RRSIG rrset, or
1208 * this one becomes that RRset */
1209 struct auth_rrset* rrsigset = az_domain_rrset(
1210 node, LDNS_RR_TYPE_RRSIG);
1212 /* move left over rrsigs to the
1213 * existing rrset of type RRSIG */
1214 rrsigs_copy_from_rrset_to_rrsigset(
1216 /* and then delete the rrset */
1217 domain_remove_rrset(node, rr_type);
1219 /* no rrset of type RRSIG, this
1220 * set is now of that type,
1221 * just remove the rr */
1222 if(!rrset_remove_rr(rrset, index))
1224 rrset->type = LDNS_RR_TYPE_RRSIG;
1225 rrset->data->count = rrset->data->rrsig_count;
1226 rrset->data->rrsig_count = 0;
1229 /* remove the RR from the rrset */
1230 if(!rrset_remove_rr(rrset, index))
1235 /* rr not found in rrset */
1238 /* is it a type RRSIG, look under the covered type */
1239 if(rr_type == LDNS_RR_TYPE_RRSIG) {
1240 uint16_t ctype = rrsig_rdata_get_type_covered(rdata, rdatalen);
1241 if((rrset=az_domain_rrset(node, ctype))!= NULL) {
1242 if(az_rrset_find_rrsig(rrset->data, rdata, rdatalen,
1244 /* rrsig should have d->count > 0, be
1245 * over some rr of that type */
1246 /* remove the rrsig from the rrsigs list of the
1248 if(!rrset_remove_rr(rrset, index))
1253 /* also RRSIG not found */
1256 /* nothing found to delete */
1257 if(nonexist) *nonexist = 1;
1261 /** remove RR from zone, ignore if it does not exist, false on alloc failure*/
1263 az_remove_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
1264 size_t dname_len, int* nonexist)
1266 struct auth_data* node;
1267 uint8_t* dname = rr;
1268 uint16_t rr_type = sldns_wirerr_get_type(rr, rr_len, dname_len);
1269 uint16_t rr_class = sldns_wirerr_get_class(rr, rr_len, dname_len);
1270 size_t rdatalen = ((size_t)sldns_wirerr_get_rdatalen(rr, rr_len,
1272 /* rdata points to rdata prefixed with uint16 rdatalength */
1273 uint8_t* rdata = sldns_wirerr_get_rdatawl(rr, rr_len, dname_len);
1275 if(rr_class != z->dclass) {
1276 log_err("wrong class for RR");
1277 /* really also a nonexisting entry, because no records
1278 * of that class in the zone, but return an error because
1279 * getting records of the wrong class is a failure of the
1283 node = az_find_name(z, dname, dname_len);
1285 /* node with that name does not exist */
1286 /* nonexisting entry, because no such name */
1290 if(!az_domain_remove_rr(node, rr_type, rdata, rdatalen, nonexist)) {
1291 /* alloc failure or so */
1294 /* remove the node, if necessary */
1295 /* an rrsets==NULL entry is not kept around for empty nonterminals,
1296 * and also parent nodes are not kept around, so we just delete it */
1297 if(node->rrsets == NULL) {
1298 (void)rbtree_delete(&z->data, node);
1299 auth_data_delete(node);
1302 rpz_remove_rr(z->rpz, z->namelen, dname, dname_len, rr_type,
1303 rr_class, rdata, rdatalen);
1308 /** decompress an RR into the buffer where it'll be an uncompressed RR
1309 * with uncompressed dname and uncompressed rdata (dnames) */
1311 decompress_rr_into_buffer(struct sldns_buffer* buf, uint8_t* pkt,
1312 size_t pktlen, uint8_t* dname, uint16_t rr_type, uint16_t rr_class,
1313 uint32_t rr_ttl, uint8_t* rr_data, uint16_t rr_rdlen)
1315 sldns_buffer pktbuf;
1316 size_t dname_len = 0;
1320 const sldns_rr_descriptor* desc;
1321 sldns_buffer_init_frm_data(&pktbuf, pkt, pktlen);
1322 sldns_buffer_clear(buf);
1324 /* decompress dname */
1325 sldns_buffer_set_position(&pktbuf,
1326 (size_t)(dname - sldns_buffer_current(&pktbuf)));
1327 dname_len = pkt_dname_len(&pktbuf);
1328 if(dname_len == 0) return 0; /* parse fail on dname */
1329 if(!sldns_buffer_available(buf, dname_len)) return 0;
1330 dname_pkt_copy(&pktbuf, sldns_buffer_current(buf), dname);
1331 sldns_buffer_skip(buf, (ssize_t)dname_len);
1333 /* type, class, ttl and rdatalength fields */
1334 if(!sldns_buffer_available(buf, 10)) return 0;
1335 sldns_buffer_write_u16(buf, rr_type);
1336 sldns_buffer_write_u16(buf, rr_class);
1337 sldns_buffer_write_u32(buf, rr_ttl);
1338 rdlenpos = sldns_buffer_position(buf);
1339 sldns_buffer_write_u16(buf, 0); /* rd length position */
1341 /* decompress rdata */
1342 desc = sldns_rr_descript(rr_type);
1345 if(rdlen > 0 && desc && desc->_dname_count > 0) {
1346 int count = (int)desc->_dname_count;
1348 size_t len; /* how much rdata to plain copy */
1349 size_t uncompressed_len, compressed_len;
1351 /* decompress dnames. */
1352 while(rdlen > 0 && count) {
1353 switch(desc->_wireformat[rdf]) {
1354 case LDNS_RDF_TYPE_DNAME:
1355 sldns_buffer_set_position(&pktbuf,
1357 sldns_buffer_begin(&pktbuf)));
1358 oldpos = sldns_buffer_position(&pktbuf);
1359 /* moves pktbuf to right after the
1360 * compressed dname, and returns uncompressed
1362 uncompressed_len = pkt_dname_len(&pktbuf);
1363 if(!uncompressed_len)
1364 return 0; /* parse error in dname */
1365 if(!sldns_buffer_available(buf,
1367 /* dname too long for buffer */
1369 dname_pkt_copy(&pktbuf,
1370 sldns_buffer_current(buf), rd);
1371 sldns_buffer_skip(buf, (ssize_t)uncompressed_len);
1372 compressed_len = sldns_buffer_position(
1374 rd += compressed_len;
1375 rdlen -= compressed_len;
1379 case LDNS_RDF_TYPE_STR:
1383 len = get_rdf_size(desc->_wireformat[rdf]);
1387 if(!sldns_buffer_available(buf, len))
1388 return 0; /* too long for buffer */
1389 sldns_buffer_write(buf, rd, len);
1396 /* copy remaining data */
1398 if(!sldns_buffer_available(buf, rdlen)) return 0;
1399 sldns_buffer_write(buf, rd, rdlen);
1401 /* fixup rdlength */
1402 sldns_buffer_write_u16_at(buf, rdlenpos,
1403 sldns_buffer_position(buf)-rdlenpos-2);
1404 sldns_buffer_flip(buf);
1408 /** insert RR into zone, from packet, decompress RR,
1409 * if duplicate is nonNULL set the flag but otherwise ignore duplicates */
1411 az_insert_rr_decompress(struct auth_zone* z, uint8_t* pkt, size_t pktlen,
1412 struct sldns_buffer* scratch_buffer, uint8_t* dname, uint16_t rr_type,
1413 uint16_t rr_class, uint32_t rr_ttl, uint8_t* rr_data,
1414 uint16_t rr_rdlen, int* duplicate)
1419 if(!decompress_rr_into_buffer(scratch_buffer, pkt, pktlen, dname,
1420 rr_type, rr_class, rr_ttl, rr_data, rr_rdlen)) {
1421 log_err("could not decompress RR");
1424 rr = sldns_buffer_begin(scratch_buffer);
1425 rr_len = sldns_buffer_limit(scratch_buffer);
1426 dname_len = dname_valid(rr, rr_len);
1427 return az_insert_rr(z, rr, rr_len, dname_len, duplicate);
1430 /** remove RR from zone, from packet, decompress RR,
1431 * if nonexist is nonNULL set the flag but otherwise ignore nonexisting entries*/
1433 az_remove_rr_decompress(struct auth_zone* z, uint8_t* pkt, size_t pktlen,
1434 struct sldns_buffer* scratch_buffer, uint8_t* dname, uint16_t rr_type,
1435 uint16_t rr_class, uint32_t rr_ttl, uint8_t* rr_data,
1436 uint16_t rr_rdlen, int* nonexist)
1441 if(!decompress_rr_into_buffer(scratch_buffer, pkt, pktlen, dname,
1442 rr_type, rr_class, rr_ttl, rr_data, rr_rdlen)) {
1443 log_err("could not decompress RR");
1446 rr = sldns_buffer_begin(scratch_buffer);
1447 rr_len = sldns_buffer_limit(scratch_buffer);
1448 dname_len = dname_valid(rr, rr_len);
1449 return az_remove_rr(z, rr, rr_len, dname_len, nonexist);
1454 * @param z: zone to read in.
1455 * @param in: file to read from (just opened).
1456 * @param rr: buffer to use for RRs, 64k.
1457 * passed so that recursive includes can use the same buffer and do
1458 * not grow the stack too much.
1459 * @param rrbuflen: sizeof rr buffer.
1460 * @param state: parse state with $ORIGIN, $TTL and 'prev-dname' and so on,
1461 * that is kept between includes.
1462 * The lineno is set at 1 and then increased by the function.
1463 * @param fname: file name.
1464 * @param depth: recursion depth for includes
1465 * @param cfg: config for chroot.
1466 * returns false on failure, has printed an error message
1469 az_parse_file(struct auth_zone* z, FILE* in, uint8_t* rr, size_t rrbuflen,
1470 struct sldns_file_parse_state* state, char* fname, int depth,
1471 struct config_file* cfg)
1473 size_t rr_len, dname_len;
1480 status = sldns_fp2wire_rr_buf(in, rr, &rr_len, &dname_len,
1482 if(status == LDNS_WIREPARSE_ERR_INCLUDE && rr_len == 0) {
1483 /* we have $INCLUDE or $something */
1484 if(strncmp((char*)rr, "$INCLUDE ", 9) == 0 ||
1485 strncmp((char*)rr, "$INCLUDE\t", 9) == 0) {
1487 int lineno_orig = state->lineno;
1488 char* incfile = (char*)rr + 8;
1489 if(depth > MAX_INCLUDE_DEPTH) {
1490 log_err("%s:%d max include depth"
1491 "exceeded", fname, state->lineno);
1495 while(*incfile == ' ' || *incfile == '\t')
1497 /* adjust for chroot on include file */
1498 if(cfg->chrootdir && cfg->chrootdir[0] &&
1499 strncmp(incfile, cfg->chrootdir,
1500 strlen(cfg->chrootdir)) == 0)
1501 incfile += strlen(cfg->chrootdir);
1502 incfile = strdup(incfile);
1504 log_err("malloc failure");
1507 verbose(VERB_ALGO, "opening $INCLUDE %s",
1509 inc = fopen(incfile, "r");
1511 log_err("%s:%d cannot open include "
1512 "file %s: %s", fname,
1513 lineno_orig, incfile,
1518 /* recurse read that file now */
1519 if(!az_parse_file(z, inc, rr, rrbuflen,
1520 state, incfile, depth+1, cfg)) {
1521 log_err("%s:%d cannot parse include "
1523 lineno_orig, incfile);
1529 verbose(VERB_ALGO, "done with $INCLUDE %s",
1532 state->lineno = lineno_orig;
1537 log_err("parse error %s %d:%d: %s", fname,
1538 state->lineno, LDNS_WIREPARSE_OFFSET(status),
1539 sldns_get_errorstr_parse(status));
1543 /* EMPTY line, TTL or ORIGIN */
1546 /* insert wirerr in rrbuf */
1547 if(!az_insert_rr(z, rr, rr_len, dname_len, NULL)) {
1549 sldns_wire2str_type_buf(sldns_wirerr_get_type(rr,
1550 rr_len, dname_len), buf, sizeof(buf));
1551 log_err("%s:%d cannot insert RR of type %s",
1552 fname, state->lineno, buf);
1560 auth_zone_read_zonefile(struct auth_zone* z, struct config_file* cfg)
1562 uint8_t rr[LDNS_RR_BUF_SIZE];
1563 struct sldns_file_parse_state state;
1566 if(!z || !z->zonefile || z->zonefile[0]==0)
1567 return 1; /* no file, or "", nothing to read */
1569 zfilename = z->zonefile;
1570 if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(zfilename,
1571 cfg->chrootdir, strlen(cfg->chrootdir)) == 0)
1572 zfilename += strlen(cfg->chrootdir);
1573 if(verbosity >= VERB_ALGO) {
1575 dname_str(z->name, nm);
1576 verbose(VERB_ALGO, "read zonefile %s for %s", zfilename, nm);
1578 in = fopen(zfilename, "r");
1580 char* n = sldns_wire2str_dname(z->name, z->namelen);
1581 if(z->zone_is_slave && errno == ENOENT) {
1582 /* we fetch the zone contents later, no file yet */
1583 verbose(VERB_ALGO, "no zonefile %s for %s",
1584 zfilename, n?n:"error");
1588 log_err("cannot open zonefile %s for %s: %s",
1589 zfilename, n?n:"error", strerror(errno));
1594 /* clear the data tree */
1595 traverse_postorder(&z->data, auth_data_del, NULL);
1596 rbtree_init(&z->data, &auth_data_cmp);
1597 /* clear the RPZ policies */
1601 memset(&state, 0, sizeof(state));
1602 /* default TTL to 3600 */
1603 state.default_ttl = 3600;
1604 /* set $ORIGIN to the zone name */
1605 if(z->namelen <= sizeof(state.origin)) {
1606 memcpy(state.origin, z->name, z->namelen);
1607 state.origin_len = z->namelen;
1609 /* parse the (toplevel) file */
1610 if(!az_parse_file(z, in, rr, sizeof(rr), &state, zfilename, 0, cfg)) {
1611 char* n = sldns_wire2str_dname(z->name, z->namelen);
1612 log_err("error parsing zonefile %s for %s",
1613 zfilename, n?n:"error");
1621 rpz_finish_config(z->rpz);
1625 /** write buffer to file and check return codes */
1627 write_out(FILE* out, const char* str, size_t len)
1632 r = fwrite(str, 1, len, out);
1634 log_err("write failed: %s", strerror(errno));
1636 } else if(r < len) {
1637 log_err("write failed: too short (disk full?)");
1643 /** convert auth rr to string */
1645 auth_rr_to_string(uint8_t* nm, size_t nmlen, uint16_t tp, uint16_t cl,
1646 struct packed_rrset_data* data, size_t i, char* s, size_t buflen)
1649 size_t slen = buflen, datlen;
1651 if(i >= data->count) tp = LDNS_RR_TYPE_RRSIG;
1654 w += sldns_wire2str_dname_scan(&dat, &datlen, &s, &slen, NULL, 0, NULL);
1655 w += sldns_str_print(&s, &slen, "\t");
1656 w += sldns_str_print(&s, &slen, "%lu\t", (unsigned long)data->rr_ttl[i]);
1657 w += sldns_wire2str_class_print(&s, &slen, cl);
1658 w += sldns_str_print(&s, &slen, "\t");
1659 w += sldns_wire2str_type_print(&s, &slen, tp);
1660 w += sldns_str_print(&s, &slen, "\t");
1661 datlen = data->rr_len[i]-2;
1662 dat = data->rr_data[i]+2;
1663 w += sldns_wire2str_rdata_scan(&dat, &datlen, &s, &slen, tp, NULL, 0, NULL);
1665 if(tp == LDNS_RR_TYPE_DNSKEY) {
1666 w += sldns_str_print(&s, &slen, " ;{id = %u}",
1667 sldns_calc_keytag_raw(data->rr_data[i]+2,
1668 data->rr_len[i]-2));
1670 w += sldns_str_print(&s, &slen, "\n");
1672 if(w >= (int)buflen) {
1673 log_nametypeclass(NO_VERBOSE, "RR too long to print", nm, tp, cl);
1679 /** write rrset to file */
1681 auth_zone_write_rrset(struct auth_zone* z, struct auth_data* node,
1682 struct auth_rrset* r, FILE* out)
1684 size_t i, count = r->data->count + r->data->rrsig_count;
1685 char buf[LDNS_RR_BUF_SIZE];
1686 for(i=0; i<count; i++) {
1687 if(!auth_rr_to_string(node->name, node->namelen, r->type,
1688 z->dclass, r->data, i, buf, sizeof(buf))) {
1689 verbose(VERB_ALGO, "failed to rr2str rr %d", (int)i);
1692 if(!write_out(out, buf, strlen(buf)))
1698 /** write domain to file */
1700 auth_zone_write_domain(struct auth_zone* z, struct auth_data* n, FILE* out)
1702 struct auth_rrset* r;
1703 /* if this is zone apex, write SOA first */
1704 if(z->namelen == n->namelen) {
1705 struct auth_rrset* soa = az_domain_rrset(n, LDNS_RR_TYPE_SOA);
1707 if(!auth_zone_write_rrset(z, n, soa, out))
1711 /* write all the RRsets for this domain */
1712 for(r = n->rrsets; r; r = r->next) {
1713 if(z->namelen == n->namelen &&
1714 r->type == LDNS_RR_TYPE_SOA)
1715 continue; /* skip SOA here */
1716 if(!auth_zone_write_rrset(z, n, r, out))
1722 int auth_zone_write_file(struct auth_zone* z, const char* fname)
1725 struct auth_data* n;
1726 out = fopen(fname, "w");
1728 log_err("could not open %s: %s", fname, strerror(errno));
1731 RBTREE_FOR(n, struct auth_data*, &z->data) {
1732 if(!auth_zone_write_domain(z, n, out)) {
1733 log_err("could not write domain to %s", fname);
1742 /** read all auth zones from file (if they have) */
1744 auth_zones_read_zones(struct auth_zones* az, struct config_file* cfg)
1746 struct auth_zone* z;
1747 lock_rw_wrlock(&az->lock);
1748 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1749 lock_rw_wrlock(&z->lock);
1750 if(!auth_zone_read_zonefile(z, cfg)) {
1751 lock_rw_unlock(&z->lock);
1752 lock_rw_unlock(&az->lock);
1755 lock_rw_unlock(&z->lock);
1757 lock_rw_unlock(&az->lock);
1761 /** find serial number of zone or false if none */
1763 auth_zone_get_serial(struct auth_zone* z, uint32_t* serial)
1765 struct auth_data* apex;
1766 struct auth_rrset* soa;
1767 struct packed_rrset_data* d;
1768 apex = az_find_name(z, z->name, z->namelen);
1770 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
1771 if(!soa || soa->data->count==0)
1772 return 0; /* no RRset or no RRs in rrset */
1773 if(soa->data->rr_len[0] < 2+4*5) return 0; /* SOA too short */
1775 *serial = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-20));
1779 /** Find auth_zone SOA and populate the values in xfr(soa values). */
1781 xfr_find_soa(struct auth_zone* z, struct auth_xfer* xfr)
1783 struct auth_data* apex;
1784 struct auth_rrset* soa;
1785 struct packed_rrset_data* d;
1786 apex = az_find_name(z, z->name, z->namelen);
1788 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
1789 if(!soa || soa->data->count==0)
1790 return 0; /* no RRset or no RRs in rrset */
1791 if(soa->data->rr_len[0] < 2+4*5) return 0; /* SOA too short */
1792 /* SOA record ends with serial, refresh, retry, expiry, minimum,
1793 * as 4 byte fields */
1796 xfr->serial = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-20));
1797 xfr->refresh = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-16));
1798 xfr->retry = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-12));
1799 xfr->expiry = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-8));
1800 /* soa minimum at d->rr_len[0]-4 */
1805 * Setup auth_xfer zone
1806 * This populates the have_zone, soa values, and so on times.
1807 * Doesn't do network traffic yet, can set option flags.
1808 * @param z: locked by caller, and modified for setup
1809 * @param x: locked by caller, and modified.
1810 * @return false on failure.
1813 auth_xfer_setup(struct auth_zone* z, struct auth_xfer* x)
1815 /* for a zone without zone transfers, x==NULL, so skip them,
1816 * i.e. the zone config is fixed with no masters or urls */
1817 if(!z || !x) return 1;
1818 if(!xfr_find_soa(z, x)) {
1821 /* nothing for probe, nextprobe and transfer tasks */
1827 * @param az: auth zones structure
1828 * @return false on failure.
1831 auth_zones_setup_zones(struct auth_zones* az)
1833 struct auth_zone* z;
1834 struct auth_xfer* x;
1835 lock_rw_wrlock(&az->lock);
1836 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1837 lock_rw_wrlock(&z->lock);
1838 x = auth_xfer_find(az, z->name, z->namelen, z->dclass);
1840 lock_basic_lock(&x->lock);
1842 if(!auth_xfer_setup(z, x)) {
1844 lock_basic_unlock(&x->lock);
1846 lock_rw_unlock(&z->lock);
1847 lock_rw_unlock(&az->lock);
1851 lock_basic_unlock(&x->lock);
1853 lock_rw_unlock(&z->lock);
1855 lock_rw_unlock(&az->lock);
1859 /** set config items and create zones */
1861 auth_zones_cfg(struct auth_zones* az, struct config_auth* c)
1863 struct auth_zone* z;
1864 struct auth_xfer* x = NULL;
1867 lock_rw_wrlock(&az->lock);
1868 if(!(z=auth_zones_find_or_add_zone(az, c->name))) {
1869 lock_rw_unlock(&az->lock);
1872 if(c->masters || c->urls) {
1873 if(!(x=auth_zones_find_or_add_xfer(az, z))) {
1874 lock_rw_unlock(&az->lock);
1875 lock_rw_unlock(&z->lock);
1879 if(c->for_downstream)
1880 az->have_downstream = 1;
1881 lock_rw_unlock(&az->lock);
1884 z->zone_deleted = 0;
1885 if(!auth_zone_set_zonefile(z, c->zonefile)) {
1887 lock_basic_unlock(&x->lock);
1889 lock_rw_unlock(&z->lock);
1892 z->for_downstream = c->for_downstream;
1893 z->for_upstream = c->for_upstream;
1894 z->fallback_enabled = c->fallback_enabled;
1895 if(c->isrpz && !z->rpz){
1896 if(!(z->rpz = rpz_create(c))){
1897 fatal_exit("Could not setup RPZ zones");
1900 lock_rw_wrlock(&az->rpz_lock);
1901 z->rpz->next = az->rpz_first;
1903 az->rpz_first->prev = z->rpz;
1904 az->rpz_first = z->rpz;
1905 lock_rw_unlock(&az->rpz_lock);
1910 z->zone_is_slave = 1;
1911 /* set options on xfer zone */
1912 if(!xfer_set_masters(&x->task_probe->masters, c, 0)) {
1913 lock_basic_unlock(&x->lock);
1914 lock_rw_unlock(&z->lock);
1917 if(!xfer_set_masters(&x->task_transfer->masters, c, 1)) {
1918 lock_basic_unlock(&x->lock);
1919 lock_rw_unlock(&z->lock);
1922 lock_basic_unlock(&x->lock);
1925 lock_rw_unlock(&z->lock);
1929 /** set all auth zones deleted, then in auth_zones_cfg, it marks them
1930 * as nondeleted (if they are still in the config), and then later
1931 * we can find deleted zones */
1933 az_setall_deleted(struct auth_zones* az)
1935 struct auth_zone* z;
1936 lock_rw_wrlock(&az->lock);
1937 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1938 lock_rw_wrlock(&z->lock);
1939 z->zone_deleted = 1;
1940 lock_rw_unlock(&z->lock);
1942 lock_rw_unlock(&az->lock);
1945 /** find zones that are marked deleted and delete them.
1946 * This is called from apply_cfg, and there are no threads and no
1947 * workers, so the xfr can just be deleted. */
1949 az_delete_deleted_zones(struct auth_zones* az)
1951 struct auth_zone* z;
1952 struct auth_zone* delete_list = NULL, *next;
1953 struct auth_xfer* xfr;
1954 lock_rw_wrlock(&az->lock);
1955 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1956 lock_rw_wrlock(&z->lock);
1957 if(z->zone_deleted) {
1958 /* we cannot alter the rbtree right now, but
1959 * we can put it on a linked list and then
1961 z->delete_next = delete_list;
1964 lock_rw_unlock(&z->lock);
1966 /* now we are out of the tree loop and we can loop and delete
1970 next = z->delete_next;
1971 xfr = auth_xfer_find(az, z->name, z->namelen, z->dclass);
1973 (void)rbtree_delete(&az->xtree, &xfr->node);
1974 auth_xfer_delete(xfr);
1976 (void)rbtree_delete(&az->ztree, &z->node);
1977 auth_zone_delete(z, az);
1980 lock_rw_unlock(&az->lock);
1983 int auth_zones_apply_cfg(struct auth_zones* az, struct config_file* cfg,
1984 int setup, int* is_rpz)
1986 struct config_auth* p;
1987 az_setall_deleted(az);
1988 for(p = cfg->auths; p; p = p->next) {
1989 if(!p->name || p->name[0] == 0) {
1990 log_warn("auth-zone without a name, skipped");
1993 *is_rpz = (*is_rpz || p->isrpz);
1994 if(!auth_zones_cfg(az, p)) {
1995 log_err("cannot config auth zone %s", p->name);
1999 az_delete_deleted_zones(az);
2000 if(!auth_zones_read_zones(az, cfg))
2003 if(!auth_zones_setup_zones(az))
2010 * @param at: transfer structure with chunks list. The chunks and their
2014 auth_chunks_delete(struct auth_transfer* at)
2016 if(at->chunks_first) {
2017 struct auth_chunk* c, *cn;
2018 c = at->chunks_first;
2026 at->chunks_first = NULL;
2027 at->chunks_last = NULL;
2030 /** free master addr list */
2032 auth_free_master_addrs(struct auth_addr* list)
2034 struct auth_addr *n;
2042 /** free the masters list */
2044 auth_free_masters(struct auth_master* list)
2046 struct auth_master* n;
2049 auth_free_master_addrs(list->list);
2057 /** delete auth xfer structure
2058 * @param xfr: delete this xfer and its tasks.
2061 auth_xfer_delete(struct auth_xfer* xfr)
2064 lock_basic_destroy(&xfr->lock);
2066 if(xfr->task_nextprobe) {
2067 comm_timer_delete(xfr->task_nextprobe->timer);
2068 free(xfr->task_nextprobe);
2070 if(xfr->task_probe) {
2071 auth_free_masters(xfr->task_probe->masters);
2072 comm_point_delete(xfr->task_probe->cp);
2073 comm_timer_delete(xfr->task_probe->timer);
2074 free(xfr->task_probe);
2076 if(xfr->task_transfer) {
2077 auth_free_masters(xfr->task_transfer->masters);
2078 comm_point_delete(xfr->task_transfer->cp);
2079 comm_timer_delete(xfr->task_transfer->timer);
2080 if(xfr->task_transfer->chunks_first) {
2081 auth_chunks_delete(xfr->task_transfer);
2083 free(xfr->task_transfer);
2085 auth_free_masters(xfr->allow_notify_list);
2089 /** helper traverse to delete zones */
2091 auth_zone_del(rbnode_type* n, void* ATTR_UNUSED(arg))
2093 struct auth_zone* z = (struct auth_zone*)n->key;
2094 auth_zone_delete(z, NULL);
2097 /** helper traverse to delete xfer zones */
2099 auth_xfer_del(rbnode_type* n, void* ATTR_UNUSED(arg))
2101 struct auth_xfer* z = (struct auth_xfer*)n->key;
2102 auth_xfer_delete(z);
2105 void auth_zones_delete(struct auth_zones* az)
2108 lock_rw_destroy(&az->lock);
2109 lock_rw_destroy(&az->rpz_lock);
2110 traverse_postorder(&az->ztree, auth_zone_del, NULL);
2111 traverse_postorder(&az->xtree, auth_xfer_del, NULL);
2115 /** true if domain has only nsec3 */
2117 domain_has_only_nsec3(struct auth_data* n)
2119 struct auth_rrset* rrset = n->rrsets;
2122 if(rrset->type == LDNS_RR_TYPE_NSEC3) {
2124 } else if(rrset->type != LDNS_RR_TYPE_RRSIG) {
2127 rrset = rrset->next;
2132 /** see if the domain has a wildcard child '*.domain' */
2133 static struct auth_data*
2134 az_find_wildcard_domain(struct auth_zone* z, uint8_t* nm, size_t nmlen)
2136 uint8_t wc[LDNS_MAX_DOMAINLEN];
2137 if(nmlen+2 > sizeof(wc))
2138 return NULL; /* result would be too long */
2139 wc[0] = 1; /* length of wildcard label */
2140 wc[1] = (uint8_t)'*'; /* wildcard label */
2141 memmove(wc+2, nm, nmlen);
2142 return az_find_name(z, wc, nmlen+2);
2145 /** find wildcard between qname and cename */
2146 static struct auth_data*
2147 az_find_wildcard(struct auth_zone* z, struct query_info* qinfo,
2148 struct auth_data* ce)
2150 uint8_t* nm = qinfo->qname;
2151 size_t nmlen = qinfo->qname_len;
2152 struct auth_data* node;
2153 if(!dname_subdomain_c(nm, z->name))
2154 return NULL; /* out of zone */
2155 while((node=az_find_wildcard_domain(z, nm, nmlen))==NULL) {
2156 /* see if we can go up to find the wildcard */
2157 if(nmlen == z->namelen)
2158 return NULL; /* top of zone reached */
2159 if(ce && nmlen == ce->namelen)
2160 return NULL; /* ce reached */
2161 if(dname_is_root(nm))
2162 return NULL; /* cannot go up */
2163 dname_remove_label(&nm, &nmlen);
2168 /** domain is not exact, find first candidate ce (name that matches
2169 * a part of qname) in tree */
2170 static struct auth_data*
2171 az_find_candidate_ce(struct auth_zone* z, struct query_info* qinfo,
2172 struct auth_data* n)
2177 nm = dname_get_shared_topdomain(qinfo->qname, n->name);
2181 dname_count_size_labels(nm, &nmlen);
2182 n = az_find_name(z, nm, nmlen);
2183 /* delete labels and go up on name */
2185 if(dname_is_root(nm))
2186 return NULL; /* cannot go up */
2187 dname_remove_label(&nm, &nmlen);
2188 n = az_find_name(z, nm, nmlen);
2193 /** go up the auth tree to next existing name. */
2194 static struct auth_data*
2195 az_domain_go_up(struct auth_zone* z, struct auth_data* n)
2197 uint8_t* nm = n->name;
2198 size_t nmlen = n->namelen;
2199 while(!dname_is_root(nm)) {
2200 dname_remove_label(&nm, &nmlen);
2201 if((n=az_find_name(z, nm, nmlen)) != NULL)
2207 /** Find the closest encloser, an name that exists and is above the
2209 * return true if the node (param node) is existing, nonobscured and
2210 * can be used to generate answers from. It is then also node_exact.
2211 * returns false if the node is not good enough (or it wasn't node_exact)
2212 * in this case the ce can be filled.
2213 * if ce is NULL, no ce exists, and likely the zone is completely empty,
2214 * not even with a zone apex.
2215 * if ce is nonNULL it is the closest enclosing upper name (that exists
2216 * itself for answer purposes). That name may have DNAME, NS or wildcard
2217 * rrset is the closest DNAME or NS rrset that was found.
2220 az_find_ce(struct auth_zone* z, struct query_info* qinfo,
2221 struct auth_data* node, int node_exact, struct auth_data** ce,
2222 struct auth_rrset** rrset)
2224 struct auth_data* n = node;
2228 /* if not exact, lookup closest exact match */
2229 n = az_find_candidate_ce(z, qinfo, n);
2231 /* if exact, the node itself is the first candidate ce */
2235 /* no direct answer from nsec3-only domains */
2236 if(n && domain_has_only_nsec3(n)) {
2241 /* with exact matches, walk up the labels until we find the
2242 * delegation, or DNAME or zone end */
2244 /* see if the current candidate has issues */
2245 /* not zone apex and has type NS */
2246 if(n->namelen != z->namelen &&
2247 (*rrset=az_domain_rrset(n, LDNS_RR_TYPE_NS)) &&
2248 /* delegate here, but DS at exact the dp has notype */
2249 (qinfo->qtype != LDNS_RR_TYPE_DS ||
2250 n->namelen != qinfo->qname_len)) {
2252 /* this is ce and the lowernode is nonexisting */
2256 /* not equal to qname and has type DNAME */
2257 if(n->namelen != qinfo->qname_len &&
2258 (*rrset=az_domain_rrset(n, LDNS_RR_TYPE_DNAME))) {
2259 /* this is ce and the lowernode is nonexisting */
2264 if(*ce == NULL && !domain_has_only_nsec3(n)) {
2265 /* if not found yet, this exact name must be
2266 * our lowest match (but not nsec3onlydomain) */
2270 /* walk up the tree by removing labels from name and lookup */
2271 n = az_domain_go_up(z, n);
2273 /* found no problems, if it was an exact node, it is fine to use */
2277 /** add additional A/AAAA from domain names in rrset rdata (+offset)
2278 * offset is number of bytes in rdata where the dname is located. */
2280 az_add_additionals_from(struct auth_zone* z, struct regional* region,
2281 struct dns_msg* msg, struct auth_rrset* rrset, size_t offset)
2283 struct packed_rrset_data* d = rrset->data;
2286 for(i=0; i<d->count; i++) {
2288 struct auth_data* domain;
2289 struct auth_rrset* ref;
2290 if(d->rr_len[i] < 2+offset)
2291 continue; /* too short */
2292 if(!(dlen = dname_valid(d->rr_data[i]+2+offset,
2293 d->rr_len[i]-2-offset)))
2294 continue; /* malformed */
2295 domain = az_find_name(z, d->rr_data[i]+2+offset, dlen);
2298 if((ref=az_domain_rrset(domain, LDNS_RR_TYPE_A)) != NULL) {
2299 if(!msg_add_rrset_ar(z, region, msg, domain, ref))
2302 if((ref=az_domain_rrset(domain, LDNS_RR_TYPE_AAAA)) != NULL) {
2303 if(!msg_add_rrset_ar(z, region, msg, domain, ref))
2310 /** add negative SOA record (with negative TTL) */
2312 az_add_negative_soa(struct auth_zone* z, struct regional* region,
2313 struct dns_msg* msg)
2316 struct packed_rrset_data* d;
2317 struct auth_rrset* soa;
2318 struct auth_data* apex = az_find_name(z, z->name, z->namelen);
2320 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
2322 /* must be first to put in message; we want to fix the TTL with
2323 * one RRset here, otherwise we'd need to loop over the RRs to get
2324 * the resulting lower TTL */
2325 log_assert(msg->rep->rrset_count == 0);
2326 if(!msg_add_rrset_ns(z, region, msg, apex, soa)) return 0;
2328 d = (struct packed_rrset_data*)msg->rep->rrsets[msg->rep->rrset_count-1]->entry.data;
2329 /* last 4 bytes are minimum ttl in network format */
2330 if(d->count == 0) return 0;
2331 if(d->rr_len[0] < 2+4) return 0;
2332 minimum = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-4));
2333 d->ttl = (time_t)minimum;
2334 d->rr_ttl[0] = (time_t)minimum;
2335 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[0]);
2336 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
2337 msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
2341 /** See if the query goes to empty nonterminal (that has no auth_data,
2342 * but there are nodes underneath. We already checked that there are
2343 * not NS, or DNAME above, so that we only need to check if some node
2344 * exists below (with nonempty rr list), return true if emptynonterminal */
2346 az_empty_nonterminal(struct auth_zone* z, struct query_info* qinfo,
2347 struct auth_data* node)
2349 struct auth_data* next;
2351 /* no smaller was found, use first (smallest) node as the
2353 next = (struct auth_data*)rbtree_first(&z->data);
2355 next = (struct auth_data*)rbtree_next(&node->node);
2357 while(next && (rbnode_type*)next != RBTREE_NULL && next->rrsets == NULL) {
2358 /* the next name has empty rrsets, is an empty nonterminal
2359 * itself, see if there exists something below it */
2360 next = (struct auth_data*)rbtree_next(&node->node);
2362 if((rbnode_type*)next == RBTREE_NULL || !next) {
2363 /* there is no next node, so something below it cannot
2367 /* a next node exists, if there was something below the query,
2368 * this node has to be it. See if it is below the query name */
2369 if(dname_strict_subdomain_c(next->name, qinfo->qname))
2374 /** create synth cname target name in buffer, or fail if too long */
2376 synth_cname_buf(uint8_t* qname, size_t qname_len, size_t dname_len,
2377 uint8_t* dtarg, size_t dtarglen, uint8_t* buf, size_t buflen)
2379 size_t newlen = qname_len + dtarglen - dname_len;
2380 if(newlen > buflen) {
2381 /* YXDOMAIN error */
2384 /* new name is concatenation of qname front (without DNAME owner)
2385 * and DNAME target name */
2386 memcpy(buf, qname, qname_len-dname_len);
2387 memmove(buf+(qname_len-dname_len), dtarg, dtarglen);
2391 /** create synthetic CNAME rrset for in a DNAME answer in region,
2392 * false on alloc failure, cname==NULL when name too long. */
2394 create_synth_cname(uint8_t* qname, size_t qname_len, struct regional* region,
2395 struct auth_data* node, struct auth_rrset* dname, uint16_t dclass,
2396 struct ub_packed_rrset_key** cname)
2398 uint8_t buf[LDNS_MAX_DOMAINLEN];
2400 size_t dtarglen, newlen;
2401 struct packed_rrset_data* d;
2403 /* get DNAME target name */
2404 if(dname->data->count < 1) return 0;
2405 if(dname->data->rr_len[0] < 3) return 0; /* at least rdatalen +1 */
2406 dtarg = dname->data->rr_data[0]+2;
2407 dtarglen = dname->data->rr_len[0]-2;
2408 if(sldns_read_uint16(dname->data->rr_data[0]) != dtarglen)
2409 return 0; /* rdatalen in DNAME rdata is malformed */
2410 if(dname_valid(dtarg, dtarglen) != dtarglen)
2411 return 0; /* DNAME RR has malformed rdata */
2413 return 0; /* too short */
2414 if(qname_len <= node->namelen)
2415 return 0; /* qname too short for dname removal */
2417 /* synthesize a CNAME */
2418 newlen = synth_cname_buf(qname, qname_len, node->namelen,
2419 dtarg, dtarglen, buf, sizeof(buf));
2421 /* YXDOMAIN error */
2425 *cname = (struct ub_packed_rrset_key*)regional_alloc(region,
2426 sizeof(struct ub_packed_rrset_key));
2428 return 0; /* out of memory */
2429 memset(&(*cname)->entry, 0, sizeof((*cname)->entry));
2430 (*cname)->entry.key = (*cname);
2431 (*cname)->rk.type = htons(LDNS_RR_TYPE_CNAME);
2432 (*cname)->rk.rrset_class = htons(dclass);
2433 (*cname)->rk.flags = 0;
2434 (*cname)->rk.dname = regional_alloc_init(region, qname, qname_len);
2435 if(!(*cname)->rk.dname)
2436 return 0; /* out of memory */
2437 (*cname)->rk.dname_len = qname_len;
2438 (*cname)->entry.hash = rrset_key_hash(&(*cname)->rk);
2439 d = (struct packed_rrset_data*)regional_alloc_zero(region,
2440 sizeof(struct packed_rrset_data) + sizeof(size_t) +
2441 sizeof(uint8_t*) + sizeof(time_t) + sizeof(uint16_t)
2444 return 0; /* out of memory */
2445 (*cname)->entry.data = d;
2446 d->ttl = 0; /* 0 for synthesized CNAME TTL */
2449 d->trust = rrset_trust_ans_noAA;
2450 d->rr_len = (size_t*)((uint8_t*)d +
2451 sizeof(struct packed_rrset_data));
2452 d->rr_len[0] = newlen + sizeof(uint16_t);
2453 packed_rrset_ptr_fixup(d);
2454 d->rr_ttl[0] = d->ttl;
2455 sldns_write_uint16(d->rr_data[0], newlen);
2456 memmove(d->rr_data[0] + sizeof(uint16_t), buf, newlen);
2460 /** add a synthesized CNAME to the answer section */
2462 add_synth_cname(struct auth_zone* z, uint8_t* qname, size_t qname_len,
2463 struct regional* region, struct dns_msg* msg, struct auth_data* dname,
2464 struct auth_rrset* rrset)
2466 struct ub_packed_rrset_key* cname;
2467 /* synthesize a CNAME */
2468 if(!create_synth_cname(qname, qname_len, region, dname, rrset,
2469 z->dclass, &cname)) {
2474 /* cname cannot be create because of YXDOMAIN */
2475 msg->rep->flags |= LDNS_RCODE_YXDOMAIN;
2478 /* add cname to message */
2479 if(!msg_grow_array(region, msg))
2481 msg->rep->rrsets[msg->rep->rrset_count] = cname;
2482 msg->rep->rrset_count++;
2483 msg->rep->an_numrrsets++;
2488 /** Change a dname to a different one, for wildcard namechange */
2490 az_change_dnames(struct dns_msg* msg, uint8_t* oldname, uint8_t* newname,
2491 size_t newlen, int an_only)
2494 size_t start = 0, end = msg->rep->rrset_count;
2495 if(!an_only) start = msg->rep->an_numrrsets;
2496 if(an_only) end = msg->rep->an_numrrsets;
2497 for(i=start; i<end; i++) {
2498 /* allocated in region so we can change the ptrs */
2499 if(query_dname_compare(msg->rep->rrsets[i]->rk.dname, oldname)
2501 msg->rep->rrsets[i]->rk.dname = newname;
2502 msg->rep->rrsets[i]->rk.dname_len = newlen;
2507 /** find NSEC record covering the query */
2508 static struct auth_rrset*
2509 az_find_nsec_cover(struct auth_zone* z, struct auth_data** node)
2511 uint8_t* nm = (*node)->name;
2512 size_t nmlen = (*node)->namelen;
2513 struct auth_rrset* rrset;
2514 /* find the NSEC for the smallest-or-equal node */
2515 /* if node == NULL, we did not find a smaller name. But the zone
2516 * name is the smallest name and should have an NSEC. So there is
2517 * no NSEC to return (for a properly signed zone) */
2518 /* for empty nonterminals, the auth-data node should not exist,
2519 * and thus we don't need to go rbtree_previous here to find
2520 * a domain with an NSEC record */
2521 /* but there could be glue, and if this is node, then it has no NSEC.
2522 * Go up to find nonglue (previous) NSEC-holding nodes */
2523 while((rrset=az_domain_rrset(*node, LDNS_RR_TYPE_NSEC)) == NULL) {
2524 if(dname_is_root(nm)) return NULL;
2525 if(nmlen == z->namelen) return NULL;
2526 dname_remove_label(&nm, &nmlen);
2527 /* adjust *node for the nsec rrset to find in */
2528 *node = az_find_name(z, nm, nmlen);
2533 /** Find NSEC and add for wildcard denial */
2535 az_nsec_wildcard_denial(struct auth_zone* z, struct regional* region,
2536 struct dns_msg* msg, uint8_t* cenm, size_t cenmlen)
2538 struct query_info qinfo;
2540 struct auth_data* node;
2541 struct auth_rrset* nsec;
2542 uint8_t wc[LDNS_MAX_DOMAINLEN];
2543 if(cenmlen+2 > sizeof(wc))
2544 return 0; /* result would be too long */
2545 wc[0] = 1; /* length of wildcard label */
2546 wc[1] = (uint8_t)'*'; /* wildcard label */
2547 memmove(wc+2, cenm, cenmlen);
2549 /* we have '*.ce' in wc wildcard name buffer */
2550 /* get nsec cover for that */
2552 qinfo.qname_len = cenmlen+2;
2555 az_find_domain(z, &qinfo, &node_exact, &node);
2556 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
2557 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
2562 /** Find the NSEC3PARAM rrset (if any) and if true you have the parameters */
2564 az_nsec3_param(struct auth_zone* z, int* algo, size_t* iter, uint8_t** salt,
2567 struct auth_data* apex;
2568 struct auth_rrset* param;
2570 apex = az_find_name(z, z->name, z->namelen);
2572 param = az_domain_rrset(apex, LDNS_RR_TYPE_NSEC3PARAM);
2573 if(!param || param->data->count==0)
2574 return 0; /* no RRset or no RRs in rrset */
2575 /* find out which NSEC3PARAM RR has supported parameters */
2576 /* skip unknown flags (dynamic signer is recalculating nsec3 chain) */
2577 for(i=0; i<param->data->count; i++) {
2578 uint8_t* rdata = param->data->rr_data[i]+2;
2579 size_t rdatalen = param->data->rr_len[i];
2581 continue; /* too short */
2582 if(!nsec3_hash_algo_size_supported((int)(rdata[0])))
2583 continue; /* unsupported algo */
2584 if(rdatalen < (size_t)(2+5+(size_t)rdata[4]))
2585 continue; /* salt missing */
2586 if((rdata[1]&NSEC3_UNKNOWN_FLAGS)!=0)
2587 continue; /* unknown flags */
2588 *algo = (int)(rdata[0]);
2589 *iter = sldns_read_uint16(rdata+2);
2590 *saltlen = rdata[4];
2593 else *salt = rdata+5;
2596 /* no supported params */
2600 /** Hash a name with nsec3param into buffer, it has zone name appended.
2601 * return length of hash */
2603 az_nsec3_hash(uint8_t* buf, size_t buflen, uint8_t* nm, size_t nmlen,
2604 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2606 size_t hlen = nsec3_hash_algo_size_supported(algo);
2607 /* buffer has domain name, nsec3hash, and 256 is for max saltlen
2608 * (salt has 0-255 length) */
2609 unsigned char p[LDNS_MAX_DOMAINLEN+1+N3HASHBUFLEN+256];
2611 if(nmlen+saltlen > sizeof(p) || hlen+saltlen > sizeof(p))
2614 return 0; /* somehow too large for destination buffer */
2615 /* hashfunc(name, salt) */
2616 memmove(p, nm, nmlen);
2617 query_dname_tolower(p);
2618 if(salt && saltlen > 0)
2619 memmove(p+nmlen, salt, saltlen);
2620 (void)secalgo_nsec3_hash(algo, p, nmlen+saltlen, (unsigned char*)buf);
2621 for(i=0; i<iter; i++) {
2622 /* hashfunc(hash, salt) */
2623 memmove(p, buf, hlen);
2624 if(salt && saltlen > 0)
2625 memmove(p+hlen, salt, saltlen);
2626 (void)secalgo_nsec3_hash(algo, p, hlen+saltlen,
2627 (unsigned char*)buf);
2632 /** Hash name and return b32encoded hashname for lookup, zone name appended */
2634 az_nsec3_hashname(struct auth_zone* z, uint8_t* hashname, size_t* hashnmlen,
2635 uint8_t* nm, size_t nmlen, int algo, size_t iter, uint8_t* salt,
2638 uint8_t hash[N3HASHBUFLEN];
2641 hlen = az_nsec3_hash(hash, sizeof(hash), nm, nmlen, algo, iter,
2645 if(*hashnmlen < hlen*2+1+z->namelen) /* approx b32 as hexb16 */
2647 ret = sldns_b32_ntop_extended_hex(hash, hlen, (char*)(hashname+1),
2651 hashname[0] = (uint8_t)ret;
2653 if((*hashnmlen) - ret < z->namelen)
2655 memmove(hashname+ret, z->name, z->namelen);
2656 *hashnmlen = z->namelen+(size_t)ret;
2660 /** Find the datanode that covers the nsec3hash-name */
2661 static struct auth_data*
2662 az_nsec3_findnode(struct auth_zone* z, uint8_t* hashnm, size_t hashnmlen)
2664 struct query_info qinfo;
2665 struct auth_data* node;
2669 qinfo.qname = hashnm;
2670 qinfo.qname_len = hashnmlen;
2671 /* because canonical ordering and b32 nsec3 ordering are the same.
2672 * this is a good lookup to find the nsec3 name. */
2673 az_find_domain(z, &qinfo, &node_exact, &node);
2674 /* but we may have to skip non-nsec3 nodes */
2675 /* this may be a lot, the way to speed that up is to have a
2676 * separate nsec3 tree with nsec3 nodes */
2677 while(node && (rbnode_type*)node != RBTREE_NULL &&
2678 !az_domain_rrset(node, LDNS_RR_TYPE_NSEC3)) {
2679 node = (struct auth_data*)rbtree_previous(&node->node);
2681 if((rbnode_type*)node == RBTREE_NULL)
2686 /** Find cover for hashed(nm, nmlen) (or NULL) */
2687 static struct auth_data*
2688 az_nsec3_find_cover(struct auth_zone* z, uint8_t* nm, size_t nmlen,
2689 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2691 struct auth_data* node;
2692 uint8_t hname[LDNS_MAX_DOMAINLEN];
2693 size_t hlen = sizeof(hname);
2694 if(!az_nsec3_hashname(z, hname, &hlen, nm, nmlen, algo, iter,
2697 node = az_nsec3_findnode(z, hname, hlen);
2700 /* we did not find any, perhaps because the NSEC3 hash is before
2701 * the first hash, we have to find the 'last hash' in the zone */
2702 node = (struct auth_data*)rbtree_last(&z->data);
2703 while(node && (rbnode_type*)node != RBTREE_NULL &&
2704 !az_domain_rrset(node, LDNS_RR_TYPE_NSEC3)) {
2705 node = (struct auth_data*)rbtree_previous(&node->node);
2707 if((rbnode_type*)node == RBTREE_NULL)
2712 /** Find exact match for hashed(nm, nmlen) NSEC3 record or NULL */
2713 static struct auth_data*
2714 az_nsec3_find_exact(struct auth_zone* z, uint8_t* nm, size_t nmlen,
2715 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2717 struct auth_data* node;
2718 uint8_t hname[LDNS_MAX_DOMAINLEN];
2719 size_t hlen = sizeof(hname);
2720 if(!az_nsec3_hashname(z, hname, &hlen, nm, nmlen, algo, iter,
2723 node = az_find_name(z, hname, hlen);
2724 if(az_domain_rrset(node, LDNS_RR_TYPE_NSEC3))
2729 /** Return nextcloser name (as a ref into the qname). This is one label
2730 * more than the cenm (cename must be a suffix of qname) */
2732 az_nsec3_get_nextcloser(uint8_t* cenm, uint8_t* qname, size_t qname_len,
2733 uint8_t** nx, size_t* nxlen)
2735 int celabs = dname_count_labels(cenm);
2736 int qlabs = dname_count_labels(qname);
2737 int strip = qlabs - celabs -1;
2738 log_assert(dname_strict_subdomain(qname, qlabs, cenm, celabs));
2742 dname_remove_labels(nx, nxlen, strip);
2745 /** Find the closest encloser that has exact NSEC3.
2746 * updated cenm to the new name. If it went up no-exact-ce is true. */
2747 static struct auth_data*
2748 az_nsec3_find_ce(struct auth_zone* z, uint8_t** cenm, size_t* cenmlen,
2749 int* no_exact_ce, int algo, size_t iter, uint8_t* salt, size_t saltlen)
2751 struct auth_data* node;
2752 while((node = az_nsec3_find_exact(z, *cenm, *cenmlen,
2753 algo, iter, salt, saltlen)) == NULL) {
2754 if(*cenmlen == z->namelen) {
2755 /* next step up would take us out of the zone. fail */
2759 dname_remove_label(cenm, cenmlen);
2764 /* Insert NSEC3 record in authority section, if NULL does nothing */
2766 az_nsec3_insert(struct auth_zone* z, struct regional* region,
2767 struct dns_msg* msg, struct auth_data* node)
2769 struct auth_rrset* nsec3;
2770 if(!node) return 1; /* no node, skip this */
2771 nsec3 = az_domain_rrset(node, LDNS_RR_TYPE_NSEC3);
2772 if(!nsec3) return 1; /* if no nsec3 RR, skip it */
2773 if(!msg_add_rrset_ns(z, region, msg, node, nsec3)) return 0;
2777 /** add NSEC3 records to the zone for the nsec3 proof.
2778 * Specify with the flags with parts of the proof are required.
2779 * the ce is the exact matching name (for notype) but also delegation points.
2780 * qname is the one where the nextcloser name can be derived from.
2781 * If NSEC3 is not properly there (in the zone) nothing is added.
2782 * always enabled: include nsec3 proving about the Closest Encloser.
2783 * that is an exact match that should exist for it.
2784 * If that does not exist, a higher exact match + nxproof is enabled
2785 * (for some sort of opt-out empty nonterminal cases).
2786 * nodataproof: search for exact match and include that instead.
2787 * ceproof: include ce proof NSEC3 (omitted for wildcard replies).
2788 * nxproof: include denial of the qname.
2789 * wcproof: include denial of wildcard (wildcard.ce).
2792 az_add_nsec3_proof(struct auth_zone* z, struct regional* region,
2793 struct dns_msg* msg, uint8_t* cenm, size_t cenmlen, uint8_t* qname,
2794 size_t qname_len, int nodataproof, int ceproof, int nxproof,
2798 size_t iter, saltlen;
2800 int no_exact_ce = 0;
2801 struct auth_data* node;
2803 /* find parameters of nsec3 proof */
2804 if(!az_nsec3_param(z, &algo, &iter, &salt, &saltlen))
2805 return 1; /* no nsec3 */
2807 /* see if the node has a hash of itself for the nodata
2808 * proof nsec3, this has to be an exact match nsec3. */
2809 struct auth_data* match;
2810 match = az_nsec3_find_exact(z, qname, qname_len, algo,
2811 iter, salt, saltlen);
2813 if(!az_nsec3_insert(z, region, msg, match))
2815 /* only nodata NSEC3 needed, no CE or others. */
2819 /* find ce that has an NSEC3 */
2821 node = az_nsec3_find_ce(z, &cenm, &cenmlen, &no_exact_ce,
2822 algo, iter, salt, saltlen);
2823 if(no_exact_ce) nxproof = 1;
2824 if(!az_nsec3_insert(z, region, msg, node))
2831 /* create nextcloser domain name */
2832 az_nsec3_get_nextcloser(cenm, qname, qname_len, &nx, &nxlen);
2833 /* find nsec3 that matches or covers it */
2834 node = az_nsec3_find_cover(z, nx, nxlen, algo, iter, salt,
2836 if(!az_nsec3_insert(z, region, msg, node))
2840 /* create wildcard name *.ce */
2841 uint8_t wc[LDNS_MAX_DOMAINLEN];
2843 if(cenmlen+2 > sizeof(wc))
2844 return 0; /* result would be too long */
2845 wc[0] = 1; /* length of wildcard label */
2846 wc[1] = (uint8_t)'*'; /* wildcard label */
2847 memmove(wc+2, cenm, cenmlen);
2849 /* find nsec3 that matches or covers it */
2850 node = az_nsec3_find_cover(z, wc, wclen, algo, iter, salt,
2852 if(!az_nsec3_insert(z, region, msg, node))
2858 /** generate answer for positive answer */
2860 az_generate_positive_answer(struct auth_zone* z, struct regional* region,
2861 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
2863 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2864 /* see if we want additional rrs */
2865 if(rrset->type == LDNS_RR_TYPE_MX) {
2866 if(!az_add_additionals_from(z, region, msg, rrset, 2))
2868 } else if(rrset->type == LDNS_RR_TYPE_SRV) {
2869 if(!az_add_additionals_from(z, region, msg, rrset, 6))
2871 } else if(rrset->type == LDNS_RR_TYPE_NS) {
2872 if(!az_add_additionals_from(z, region, msg, rrset, 0))
2878 /** generate answer for type ANY answer */
2880 az_generate_any_answer(struct auth_zone* z, struct regional* region,
2881 struct dns_msg* msg, struct auth_data* node)
2883 struct auth_rrset* rrset;
2885 /* add a couple (at least one) RRs */
2886 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_SOA)) != NULL) {
2887 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2890 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_MX)) != NULL) {
2891 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2894 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_A)) != NULL) {
2895 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2898 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_AAAA)) != NULL) {
2899 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2902 if(added == 0 && node && node->rrsets) {
2903 if(!msg_add_rrset_an(z, region, msg, node,
2904 node->rrsets)) return 0;
2909 /** follow cname chain and add more data to the answer section */
2911 follow_cname_chain(struct auth_zone* z, uint16_t qtype,
2912 struct regional* region, struct dns_msg* msg,
2913 struct packed_rrset_data* d)
2916 /* see if we can add the target of the CNAME into the answer */
2917 while(maxchain++ < MAX_CNAME_CHAIN) {
2918 struct auth_data* node;
2919 struct auth_rrset* rrset;
2921 /* d has cname rdata */
2922 if(d->count == 0) break; /* no CNAME */
2923 if(d->rr_len[0] < 2+1) break; /* too small */
2924 if((clen=dname_valid(d->rr_data[0]+2, d->rr_len[0]-2))==0)
2925 break; /* malformed */
2926 if(!dname_subdomain_c(d->rr_data[0]+2, z->name))
2927 break; /* target out of zone */
2928 if((node = az_find_name(z, d->rr_data[0]+2, clen))==NULL)
2929 break; /* no such target name */
2930 if((rrset=az_domain_rrset(node, qtype))!=NULL) {
2931 /* done we found the target */
2932 if(!msg_add_rrset_an(z, region, msg, node, rrset))
2936 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_CNAME))==NULL)
2937 break; /* no further CNAME chain, notype */
2938 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2944 /** generate answer for cname answer */
2946 az_generate_cname_answer(struct auth_zone* z, struct query_info* qinfo,
2947 struct regional* region, struct dns_msg* msg,
2948 struct auth_data* node, struct auth_rrset* rrset)
2950 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2951 if(!rrset) return 1;
2952 if(!follow_cname_chain(z, qinfo->qtype, region, msg, rrset->data))
2957 /** generate answer for notype answer */
2959 az_generate_notype_answer(struct auth_zone* z, struct regional* region,
2960 struct dns_msg* msg, struct auth_data* node)
2962 struct auth_rrset* rrset;
2963 if(!az_add_negative_soa(z, region, msg)) return 0;
2964 /* DNSSEC denial NSEC */
2965 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_NSEC))!=NULL) {
2966 if(!msg_add_rrset_ns(z, region, msg, node, rrset)) return 0;
2968 /* DNSSEC denial NSEC3 */
2969 if(!az_add_nsec3_proof(z, region, msg, node->name,
2970 node->namelen, msg->qinfo.qname,
2971 msg->qinfo.qname_len, 1, 1, 0, 0))
2977 /** generate answer for referral answer */
2979 az_generate_referral_answer(struct auth_zone* z, struct regional* region,
2980 struct dns_msg* msg, struct auth_data* ce, struct auth_rrset* rrset)
2982 struct auth_rrset* ds, *nsec;
2983 /* turn off AA flag, referral is nonAA because it leaves the zone */
2985 msg->rep->flags &= ~BIT_AA;
2986 if(!msg_add_rrset_ns(z, region, msg, ce, rrset)) return 0;
2987 /* add DS or deny it */
2988 if((ds=az_domain_rrset(ce, LDNS_RR_TYPE_DS))!=NULL) {
2989 if(!msg_add_rrset_ns(z, region, msg, ce, ds)) return 0;
2992 if((nsec=az_domain_rrset(ce, LDNS_RR_TYPE_NSEC))!=NULL) {
2993 if(!msg_add_rrset_ns(z, region, msg, ce, nsec))
2996 if(!az_add_nsec3_proof(z, region, msg, ce->name,
2997 ce->namelen, msg->qinfo.qname,
2998 msg->qinfo.qname_len, 1, 1, 0, 0))
3002 /* add additional rrs for type NS */
3003 if(!az_add_additionals_from(z, region, msg, rrset, 0)) return 0;
3007 /** generate answer for DNAME answer */
3009 az_generate_dname_answer(struct auth_zone* z, struct query_info* qinfo,
3010 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
3011 struct auth_rrset* rrset)
3014 /* add the DNAME and then a CNAME */
3015 if(!msg_add_rrset_an(z, region, msg, ce, rrset)) return 0;
3016 if(!add_synth_cname(z, qinfo->qname, qinfo->qname_len, region,
3017 msg, ce, rrset)) return 0;
3018 if(FLAGS_GET_RCODE(msg->rep->flags) == LDNS_RCODE_YXDOMAIN)
3020 if(msg->rep->rrset_count == 0 ||
3021 !msg->rep->rrsets[msg->rep->rrset_count-1])
3023 if(!follow_cname_chain(z, qinfo->qtype, region, msg,
3024 (struct packed_rrset_data*)msg->rep->rrsets[
3025 msg->rep->rrset_count-1]->entry.data))
3030 /** generate answer for wildcard answer */
3032 az_generate_wildcard_answer(struct auth_zone* z, struct query_info* qinfo,
3033 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
3034 struct auth_data* wildcard, struct auth_data* node)
3036 struct auth_rrset* rrset, *nsec;
3038 if((rrset=az_domain_rrset(wildcard, qinfo->qtype)) != NULL) {
3039 /* wildcard has type, add it */
3040 if(!msg_add_rrset_an(z, region, msg, wildcard, rrset))
3042 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3043 msg->qinfo.qname_len, 1);
3044 } else if((rrset=az_domain_rrset(wildcard, LDNS_RR_TYPE_CNAME))!=NULL) {
3045 /* wildcard has cname instead, do that */
3046 if(!msg_add_rrset_an(z, region, msg, wildcard, rrset))
3048 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3049 msg->qinfo.qname_len, 1);
3050 if(!follow_cname_chain(z, qinfo->qtype, region, msg,
3053 } else if(qinfo->qtype == LDNS_RR_TYPE_ANY && wildcard->rrsets) {
3054 /* add ANY rrsets from wildcard node */
3055 if(!az_generate_any_answer(z, region, msg, wildcard))
3057 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3058 msg->qinfo.qname_len, 1);
3060 /* wildcard has nodata, notype answer */
3061 /* call other notype routine for dnssec notype denials */
3062 if(!az_generate_notype_answer(z, region, msg, wildcard))
3064 /* because the notype, there is no positive data with an
3065 * RRSIG that indicates the wildcard position. Thus the
3066 * wildcard qname denial needs to have a CE nsec3. */
3070 /* ce and node for dnssec denial of wildcard original name */
3071 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
3072 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
3074 uint8_t* wildup = wildcard->name;
3075 size_t wilduplen= wildcard->namelen;
3076 dname_remove_label(&wildup, &wilduplen);
3077 if(!az_add_nsec3_proof(z, region, msg, wildup,
3078 wilduplen, msg->qinfo.qname,
3079 msg->qinfo.qname_len, 0, insert_ce, 1, 0))
3083 /* fixup name of wildcard from *.zone to qname, use already allocated
3084 * pointer to msg qname */
3085 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3086 msg->qinfo.qname_len, 0);
3090 /** generate answer for nxdomain answer */
3092 az_generate_nxdomain_answer(struct auth_zone* z, struct regional* region,
3093 struct dns_msg* msg, struct auth_data* ce, struct auth_data* node)
3095 struct auth_rrset* nsec;
3096 msg->rep->flags |= LDNS_RCODE_NXDOMAIN;
3097 if(!az_add_negative_soa(z, region, msg)) return 0;
3098 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
3099 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
3100 if(ce && !az_nsec_wildcard_denial(z, region, msg, ce->name,
3101 ce->namelen)) return 0;
3103 if(!az_add_nsec3_proof(z, region, msg, ce->name,
3104 ce->namelen, msg->qinfo.qname,
3105 msg->qinfo.qname_len, 0, 1, 1, 1))
3111 /** Create answers when an exact match exists for the domain name */
3113 az_generate_answer_with_node(struct auth_zone* z, struct query_info* qinfo,
3114 struct regional* region, struct dns_msg* msg, struct auth_data* node)
3116 struct auth_rrset* rrset;
3117 /* positive answer, rrset we are looking for exists */
3118 if((rrset=az_domain_rrset(node, qinfo->qtype)) != NULL) {
3119 return az_generate_positive_answer(z, region, msg, node, rrset);
3122 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_CNAME)) != NULL) {
3123 return az_generate_cname_answer(z, qinfo, region, msg,
3127 if(qinfo->qtype == LDNS_RR_TYPE_ANY) {
3128 return az_generate_any_answer(z, region, msg, node);
3130 /* NOERROR/NODATA (no such type at domain name) */
3131 return az_generate_notype_answer(z, region, msg, node);
3134 /** Generate answer without an existing-node that we can use.
3135 * So it'll be a referral, DNAME or nxdomain */
3137 az_generate_answer_nonexistnode(struct auth_zone* z, struct query_info* qinfo,
3138 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
3139 struct auth_rrset* rrset, struct auth_data* node)
3141 struct auth_data* wildcard;
3143 /* we do not have an exact matching name (that exists) */
3144 /* see if we have a NS or DNAME in the ce */
3145 if(ce && rrset && rrset->type == LDNS_RR_TYPE_NS) {
3146 return az_generate_referral_answer(z, region, msg, ce, rrset);
3148 if(ce && rrset && rrset->type == LDNS_RR_TYPE_DNAME) {
3149 return az_generate_dname_answer(z, qinfo, region, msg, ce,
3152 /* if there is an empty nonterminal, wildcard and nxdomain don't
3153 * happen, it is a notype answer */
3154 if(az_empty_nonterminal(z, qinfo, node)) {
3155 return az_generate_notype_answer(z, region, msg, node);
3157 /* see if we have a wildcard under the ce */
3158 if((wildcard=az_find_wildcard(z, qinfo, ce)) != NULL) {
3159 return az_generate_wildcard_answer(z, qinfo, region, msg,
3160 ce, wildcard, node);
3162 /* generate nxdomain answer */
3163 return az_generate_nxdomain_answer(z, region, msg, ce, node);
3166 /** Lookup answer in a zone. */
3168 auth_zone_generate_answer(struct auth_zone* z, struct query_info* qinfo,
3169 struct regional* region, struct dns_msg** msg, int* fallback)
3171 struct auth_data* node, *ce;
3172 struct auth_rrset* rrset;
3173 int node_exact, node_exists;
3174 /* does the zone want fallback in case of failure? */
3175 *fallback = z->fallback_enabled;
3176 if(!(*msg=msg_create(region, qinfo))) return 0;
3178 /* lookup if there is a matching domain name for the query */
3179 az_find_domain(z, qinfo, &node_exact, &node);
3181 /* see if node exists for generating answers from (i.e. not glue and
3182 * obscured by NS or DNAME or NSEC3-only), and also return the
3183 * closest-encloser from that, closest node that should be used
3184 * to generate answers from that is above the query */
3185 node_exists = az_find_ce(z, qinfo, node, node_exact, &ce, &rrset);
3187 if(verbosity >= VERB_ALGO) {
3188 char zname[256], qname[256], nname[256], cename[256],
3189 tpstr[32], rrstr[32];
3190 sldns_wire2str_dname_buf(qinfo->qname, qinfo->qname_len, qname,
3192 sldns_wire2str_type_buf(qinfo->qtype, tpstr, sizeof(tpstr));
3193 sldns_wire2str_dname_buf(z->name, z->namelen, zname,
3196 sldns_wire2str_dname_buf(node->name, node->namelen,
3197 nname, sizeof(nname));
3198 else snprintf(nname, sizeof(nname), "NULL");
3200 sldns_wire2str_dname_buf(ce->name, ce->namelen,
3201 cename, sizeof(cename));
3202 else snprintf(cename, sizeof(cename), "NULL");
3203 if(rrset) sldns_wire2str_type_buf(rrset->type, rrstr,
3205 else snprintf(rrstr, sizeof(rrstr), "NULL");
3206 log_info("auth_zone %s query %s %s, domain %s %s %s, "
3207 "ce %s, rrset %s", zname, qname, tpstr, nname,
3208 (node_exact?"exact":"notexact"),
3209 (node_exists?"exist":"notexist"), cename, rrstr);
3213 /* the node is fine, generate answer from node */
3214 return az_generate_answer_with_node(z, qinfo, region, *msg,
3217 return az_generate_answer_nonexistnode(z, qinfo, region, *msg,
3221 int auth_zones_lookup(struct auth_zones* az, struct query_info* qinfo,
3222 struct regional* region, struct dns_msg** msg, int* fallback,
3223 uint8_t* dp_nm, size_t dp_nmlen)
3226 struct auth_zone* z;
3227 /* find the zone that should contain the answer. */
3228 lock_rw_rdlock(&az->lock);
3229 z = auth_zone_find(az, dp_nm, dp_nmlen, qinfo->qclass);
3231 lock_rw_unlock(&az->lock);
3232 /* no auth zone, fallback to internet */
3236 lock_rw_rdlock(&z->lock);
3237 lock_rw_unlock(&az->lock);
3239 /* if not for upstream queries, fallback */
3240 if(!z->for_upstream) {
3241 lock_rw_unlock(&z->lock);
3245 if(z->zone_expired) {
3246 *fallback = z->fallback_enabled;
3247 lock_rw_unlock(&z->lock);
3250 /* see what answer that zone would generate */
3251 r = auth_zone_generate_answer(z, qinfo, region, msg, fallback);
3252 lock_rw_unlock(&z->lock);
3256 /** encode auth answer */
3258 auth_answer_encode(struct query_info* qinfo, struct module_env* env,
3259 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
3260 struct regional* temp, struct dns_msg* msg)
3263 udpsize = edns->udp_size;
3264 edns->edns_version = EDNS_ADVERTISED_VERSION;
3265 edns->udp_size = EDNS_ADVERTISED_SIZE;
3266 edns->ext_rcode = 0;
3267 edns->bits &= EDNS_DO;
3269 if(!inplace_cb_reply_local_call(env, qinfo, NULL, msg->rep,
3270 (int)FLAGS_GET_RCODE(msg->rep->flags), edns, repinfo, temp)
3271 || !reply_info_answer_encode(qinfo, msg->rep,
3272 *(uint16_t*)sldns_buffer_begin(buf),
3273 sldns_buffer_read_u16_at(buf, 2),
3274 buf, 0, 0, temp, udpsize, edns,
3275 (int)(edns->bits&EDNS_DO), 0)) {
3276 error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
3277 *(uint16_t*)sldns_buffer_begin(buf),
3278 sldns_buffer_read_u16_at(buf, 2), edns);
3282 /** encode auth error answer */
3284 auth_error_encode(struct query_info* qinfo, struct module_env* env,
3285 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
3286 struct regional* temp, int rcode)
3288 edns->edns_version = EDNS_ADVERTISED_VERSION;
3289 edns->udp_size = EDNS_ADVERTISED_SIZE;
3290 edns->ext_rcode = 0;
3291 edns->bits &= EDNS_DO;
3293 if(!inplace_cb_reply_local_call(env, qinfo, NULL, NULL,
3294 rcode, edns, repinfo, temp))
3295 edns->opt_list = NULL;
3296 error_encode(buf, rcode|BIT_AA, qinfo,
3297 *(uint16_t*)sldns_buffer_begin(buf),
3298 sldns_buffer_read_u16_at(buf, 2), edns);
3301 int auth_zones_answer(struct auth_zones* az, struct module_env* env,
3302 struct query_info* qinfo, struct edns_data* edns,
3303 struct comm_reply* repinfo, struct sldns_buffer* buf, struct regional* temp)
3305 struct dns_msg* msg = NULL;
3306 struct auth_zone* z;
3310 lock_rw_rdlock(&az->lock);
3311 if(!az->have_downstream) {
3312 /* no downstream auth zones */
3313 lock_rw_unlock(&az->lock);
3316 if(qinfo->qtype == LDNS_RR_TYPE_DS) {
3317 uint8_t* delname = qinfo->qname;
3318 size_t delnamelen = qinfo->qname_len;
3319 dname_remove_label(&delname, &delnamelen);
3320 z = auth_zones_find_zone(az, delname, delnamelen,
3323 z = auth_zones_find_zone(az, qinfo->qname, qinfo->qname_len,
3327 /* no zone above it */
3328 lock_rw_unlock(&az->lock);
3331 lock_rw_rdlock(&z->lock);
3332 lock_rw_unlock(&az->lock);
3333 if(!z->for_downstream) {
3334 lock_rw_unlock(&z->lock);
3337 if(z->zone_expired) {
3338 if(z->fallback_enabled) {
3339 lock_rw_unlock(&z->lock);
3342 lock_rw_unlock(&z->lock);
3343 lock_rw_wrlock(&az->lock);
3344 az->num_query_down++;
3345 lock_rw_unlock(&az->lock);
3346 auth_error_encode(qinfo, env, edns, repinfo, buf, temp,
3347 LDNS_RCODE_SERVFAIL);
3351 /* answer it from zone z */
3352 r = auth_zone_generate_answer(z, qinfo, temp, &msg, &fallback);
3353 lock_rw_unlock(&z->lock);
3354 if(!r && fallback) {
3355 /* fallback to regular answering (recursive) */
3358 lock_rw_wrlock(&az->lock);
3359 az->num_query_down++;
3360 lock_rw_unlock(&az->lock);
3364 auth_error_encode(qinfo, env, edns, repinfo, buf, temp,
3365 LDNS_RCODE_SERVFAIL);
3366 else auth_answer_encode(qinfo, env, edns, repinfo, buf, temp, msg);
3371 int auth_zones_can_fallback(struct auth_zones* az, uint8_t* nm, size_t nmlen,
3375 struct auth_zone* z;
3376 lock_rw_rdlock(&az->lock);
3377 z = auth_zone_find(az, nm, nmlen, dclass);
3379 lock_rw_unlock(&az->lock);
3380 /* no such auth zone, fallback */
3383 lock_rw_rdlock(&z->lock);
3384 lock_rw_unlock(&az->lock);
3385 r = z->fallback_enabled || (!z->for_upstream);
3386 lock_rw_unlock(&z->lock);
3391 auth_zone_parse_notify_serial(sldns_buffer* pkt, uint32_t *serial)
3393 struct query_info q;
3395 memset(&q, 0, sizeof(q));
3396 sldns_buffer_set_position(pkt, 0);
3397 if(!query_info_parse(&q, pkt)) return 0;
3398 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) == 0) return 0;
3399 /* skip name of RR in answer section */
3400 if(sldns_buffer_remaining(pkt) < 1) return 0;
3401 if(pkt_dname_len(pkt) == 0) return 0;
3403 if(sldns_buffer_remaining(pkt) < 10 /* type,class,ttl,rdatalen*/)
3405 if(sldns_buffer_read_u16(pkt) != LDNS_RR_TYPE_SOA) return 0;
3406 sldns_buffer_skip(pkt, 2); /* class */
3407 sldns_buffer_skip(pkt, 4); /* ttl */
3408 rdlen = sldns_buffer_read_u16(pkt); /* rdatalen */
3409 if(sldns_buffer_remaining(pkt) < rdlen) return 0;
3410 if(rdlen < 22) return 0; /* bad soa length */
3411 sldns_buffer_skip(pkt, (ssize_t)(rdlen-20));
3412 *serial = sldns_buffer_read_u32(pkt);
3413 /* return true when has serial in answer section */
3417 /** see if addr appears in the list */
3419 addr_in_list(struct auth_addr* list, struct sockaddr_storage* addr,
3422 struct auth_addr* p;
3423 for(p=list; p; p=p->next) {
3424 if(sockaddr_cmp_addr(addr, addrlen, &p->addr, p->addrlen)==0)
3430 /** check if an address matches a master specification (or one of its
3431 * addresses in the addr list) */
3433 addr_matches_master(struct auth_master* master, struct sockaddr_storage* addr,
3434 socklen_t addrlen, struct auth_master** fromhost)
3436 struct sockaddr_storage a;
3439 if(addr_in_list(master->list, addr, addrlen)) {
3443 /* compare address (but not port number, that is the destination
3444 * port of the master, the port number of the received notify is
3445 * allowed to by any port on that master) */
3446 if(extstrtoaddr(master->host, &a, &alen) &&
3447 sockaddr_cmp_addr(addr, addrlen, &a, alen)==0) {
3451 /* prefixes, addr/len, like 10.0.0.0/8 */
3452 /* not http and has a / and there is one / */
3453 if(master->allow_notify && !master->http &&
3454 strchr(master->host, '/') != NULL &&
3455 strchr(master->host, '/') == strrchr(master->host, '/') &&
3456 netblockstrtoaddr(master->host, UNBOUND_DNS_PORT, &a, &alen,
3457 &net) && alen == addrlen) {
3458 if(addr_in_common(addr, (addr_is_ip6(addr, addrlen)?128:32),
3459 &a, net, alen) >= net) {
3460 *fromhost = NULL; /* prefix does not have destination
3461 to send the probe or transfer with */
3462 return 1; /* matches the netblock */
3468 /** check access list for notifies */
3470 az_xfr_allowed_notify(struct auth_xfer* xfr, struct sockaddr_storage* addr,
3471 socklen_t addrlen, struct auth_master** fromhost)
3473 struct auth_master* p;
3474 for(p=xfr->allow_notify_list; p; p=p->next) {
3475 if(addr_matches_master(p, addr, addrlen, fromhost)) {
3482 /** see if the serial means the zone has to be updated, i.e. the serial
3483 * is newer than the zone serial, or we have no zone */
3485 xfr_serial_means_update(struct auth_xfer* xfr, uint32_t serial)
3488 return 1; /* no zone, anything is better */
3489 if(xfr->zone_expired)
3490 return 1; /* expired, the sent serial is better than expired
3492 if(compare_serial(xfr->serial, serial) < 0)
3493 return 1; /* our serial is smaller than the sent serial,
3494 the data is newer, fetch it */
3498 /** note notify serial, updates the notify information in the xfr struct */
3500 xfr_note_notify_serial(struct auth_xfer* xfr, int has_serial, uint32_t serial)
3502 if(xfr->notify_received && xfr->notify_has_serial && has_serial) {
3503 /* see if this serial is newer */
3504 if(compare_serial(xfr->notify_serial, serial) < 0)
3505 xfr->notify_serial = serial;
3506 } else if(xfr->notify_received && xfr->notify_has_serial &&
3508 /* remove serial, we have notify without serial */
3509 xfr->notify_has_serial = 0;
3510 xfr->notify_serial = 0;
3511 } else if(xfr->notify_received && !xfr->notify_has_serial) {
3512 /* we already have notify without serial, keep it
3513 * that way; no serial check when current operation
3516 xfr->notify_received = 1;
3517 xfr->notify_has_serial = has_serial;
3518 xfr->notify_serial = serial;
3522 /** process a notify serial, start new probe or note serial. xfr is locked */
3524 xfr_process_notify(struct auth_xfer* xfr, struct module_env* env,
3525 int has_serial, uint32_t serial, struct auth_master* fromhost)
3527 /* if the serial of notify is older than we have, don't fetch
3528 * a zone, we already have it */
3529 if(has_serial && !xfr_serial_means_update(xfr, serial)) {
3530 lock_basic_unlock(&xfr->lock);
3533 /* start new probe with this addr src, or note serial */
3534 if(!xfr_start_probe(xfr, env, fromhost)) {
3535 /* not started because already in progress, note the serial */
3536 xfr_note_notify_serial(xfr, has_serial, serial);
3537 lock_basic_unlock(&xfr->lock);
3539 /* successful end of start_probe unlocked xfr->lock */
3542 int auth_zones_notify(struct auth_zones* az, struct module_env* env,
3543 uint8_t* nm, size_t nmlen, uint16_t dclass,
3544 struct sockaddr_storage* addr, socklen_t addrlen, int has_serial,
3545 uint32_t serial, int* refused)
3547 struct auth_xfer* xfr;
3548 struct auth_master* fromhost = NULL;
3549 /* see which zone this is */
3550 lock_rw_rdlock(&az->lock);
3551 xfr = auth_xfer_find(az, nm, nmlen, dclass);
3553 lock_rw_unlock(&az->lock);
3554 /* no such zone, refuse the notify */
3558 lock_basic_lock(&xfr->lock);
3559 lock_rw_unlock(&az->lock);
3561 /* check access list for notifies */
3562 if(!az_xfr_allowed_notify(xfr, addr, addrlen, &fromhost)) {
3563 lock_basic_unlock(&xfr->lock);
3564 /* notify not allowed, refuse the notify */
3569 /* process the notify */
3570 xfr_process_notify(xfr, env, has_serial, serial, fromhost);
3574 int auth_zones_startprobesequence(struct auth_zones* az,
3575 struct module_env* env, uint8_t* nm, size_t nmlen, uint16_t dclass)
3577 struct auth_xfer* xfr;
3578 lock_rw_rdlock(&az->lock);
3579 xfr = auth_xfer_find(az, nm, nmlen, dclass);
3581 lock_rw_unlock(&az->lock);
3584 lock_basic_lock(&xfr->lock);
3585 lock_rw_unlock(&az->lock);
3587 xfr_process_notify(xfr, env, 0, 0, NULL);
3591 /** set a zone expired */
3593 auth_xfer_set_expired(struct auth_xfer* xfr, struct module_env* env,
3596 struct auth_zone* z;
3599 lock_basic_lock(&xfr->lock);
3600 xfr->zone_expired = expired;
3601 lock_basic_unlock(&xfr->lock);
3603 /* find auth_zone */
3604 lock_rw_rdlock(&env->auth_zones->lock);
3605 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
3608 lock_rw_unlock(&env->auth_zones->lock);
3611 lock_rw_wrlock(&z->lock);
3612 lock_rw_unlock(&env->auth_zones->lock);
3614 /* expire auth_zone */
3615 z->zone_expired = expired;
3616 lock_rw_unlock(&z->lock);
3619 /** find master (from notify or probe) in list of masters */
3620 static struct auth_master*
3621 find_master_by_host(struct auth_master* list, char* host)
3623 struct auth_master* p;
3624 for(p=list; p; p=p->next) {
3625 if(strcmp(p->host, host) == 0)
3631 /** delete the looked up auth_addrs for all the masters in the list */
3633 xfr_masterlist_free_addrs(struct auth_master* list)
3635 struct auth_master* m;
3636 for(m=list; m; m=m->next) {
3638 auth_free_master_addrs(m->list);
3644 /** copy a list of auth_addrs */
3645 static struct auth_addr*
3646 auth_addr_list_copy(struct auth_addr* source)
3648 struct auth_addr* list = NULL, *last = NULL;
3649 struct auth_addr* p;
3650 for(p=source; p; p=p->next) {
3651 struct auth_addr* a = (struct auth_addr*)memdup(p, sizeof(*p));
3653 log_err("malloc failure");
3654 auth_free_master_addrs(list);
3658 if(last) last->next = a;
3665 /** copy a master to a new structure, NULL on alloc failure */
3666 static struct auth_master*
3667 auth_master_copy(struct auth_master* o)
3669 struct auth_master* m;
3671 m = (struct auth_master*)memdup(o, sizeof(*o));
3673 log_err("malloc failure");
3678 m->host = strdup(m->host);
3681 log_err("malloc failure");
3686 m->file = strdup(m->file);
3690 log_err("malloc failure");
3695 m->list = auth_addr_list_copy(m->list);
3706 /** copy the master addresses from the task_probe lookups to the allow_notify
3707 * list of masters */
3709 probe_copy_masters_for_allow_notify(struct auth_xfer* xfr)
3711 struct auth_master* list = NULL, *last = NULL;
3712 struct auth_master* p;
3713 /* build up new list with copies */
3714 for(p = xfr->task_probe->masters; p; p=p->next) {
3715 struct auth_master* m = auth_master_copy(p);
3717 auth_free_masters(list);
3718 /* failed because of malloc failure, use old list */
3722 if(last) last->next = m;
3726 /* success, replace list */
3727 auth_free_masters(xfr->allow_notify_list);
3728 xfr->allow_notify_list = list;
3731 /** start the lookups for task_transfer */
3733 xfr_transfer_start_lookups(struct auth_xfer* xfr)
3735 /* delete all the looked up addresses in the list */
3736 xfr->task_transfer->scan_addr = NULL;
3737 xfr_masterlist_free_addrs(xfr->task_transfer->masters);
3739 /* start lookup at the first master */
3740 xfr->task_transfer->lookup_target = xfr->task_transfer->masters;
3741 xfr->task_transfer->lookup_aaaa = 0;
3744 /** move to the next lookup of hostname for task_transfer */
3746 xfr_transfer_move_to_next_lookup(struct auth_xfer* xfr, struct module_env* env)
3748 if(!xfr->task_transfer->lookup_target)
3749 return; /* already at end of list */
3750 if(!xfr->task_transfer->lookup_aaaa && env->cfg->do_ip6) {
3751 /* move to lookup AAAA */
3752 xfr->task_transfer->lookup_aaaa = 1;
3755 xfr->task_transfer->lookup_target =
3756 xfr->task_transfer->lookup_target->next;
3757 xfr->task_transfer->lookup_aaaa = 0;
3758 if(!env->cfg->do_ip4 && xfr->task_transfer->lookup_target!=NULL)
3759 xfr->task_transfer->lookup_aaaa = 1;
3762 /** start the lookups for task_probe */
3764 xfr_probe_start_lookups(struct auth_xfer* xfr)
3766 /* delete all the looked up addresses in the list */
3767 xfr->task_probe->scan_addr = NULL;
3768 xfr_masterlist_free_addrs(xfr->task_probe->masters);
3770 /* start lookup at the first master */
3771 xfr->task_probe->lookup_target = xfr->task_probe->masters;
3772 xfr->task_probe->lookup_aaaa = 0;
3775 /** move to the next lookup of hostname for task_probe */
3777 xfr_probe_move_to_next_lookup(struct auth_xfer* xfr, struct module_env* env)
3779 if(!xfr->task_probe->lookup_target)
3780 return; /* already at end of list */
3781 if(!xfr->task_probe->lookup_aaaa && env->cfg->do_ip6) {
3782 /* move to lookup AAAA */
3783 xfr->task_probe->lookup_aaaa = 1;
3786 xfr->task_probe->lookup_target = xfr->task_probe->lookup_target->next;
3787 xfr->task_probe->lookup_aaaa = 0;
3788 if(!env->cfg->do_ip4 && xfr->task_probe->lookup_target!=NULL)
3789 xfr->task_probe->lookup_aaaa = 1;
3792 /** start the iteration of the task_transfer list of masters */
3794 xfr_transfer_start_list(struct auth_xfer* xfr, struct auth_master* spec)
3797 xfr->task_transfer->scan_specific = find_master_by_host(
3798 xfr->task_transfer->masters, spec->host);
3799 if(xfr->task_transfer->scan_specific) {
3800 xfr->task_transfer->scan_target = NULL;
3801 xfr->task_transfer->scan_addr = NULL;
3802 if(xfr->task_transfer->scan_specific->list)
3803 xfr->task_transfer->scan_addr =
3804 xfr->task_transfer->scan_specific->list;
3808 /* no specific (notified) host to scan */
3809 xfr->task_transfer->scan_specific = NULL;
3810 xfr->task_transfer->scan_addr = NULL;
3811 /* pick up first scan target */
3812 xfr->task_transfer->scan_target = xfr->task_transfer->masters;
3813 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3815 xfr->task_transfer->scan_addr =
3816 xfr->task_transfer->scan_target->list;
3819 /** start the iteration of the task_probe list of masters */
3821 xfr_probe_start_list(struct auth_xfer* xfr, struct auth_master* spec)
3824 xfr->task_probe->scan_specific = find_master_by_host(
3825 xfr->task_probe->masters, spec->host);
3826 if(xfr->task_probe->scan_specific) {
3827 xfr->task_probe->scan_target = NULL;
3828 xfr->task_probe->scan_addr = NULL;
3829 if(xfr->task_probe->scan_specific->list)
3830 xfr->task_probe->scan_addr =
3831 xfr->task_probe->scan_specific->list;
3835 /* no specific (notified) host to scan */
3836 xfr->task_probe->scan_specific = NULL;
3837 xfr->task_probe->scan_addr = NULL;
3838 /* pick up first scan target */
3839 xfr->task_probe->scan_target = xfr->task_probe->masters;
3840 if(xfr->task_probe->scan_target && xfr->task_probe->scan_target->list)
3841 xfr->task_probe->scan_addr =
3842 xfr->task_probe->scan_target->list;
3845 /** pick up the master that is being scanned right now, task_transfer */
3846 static struct auth_master*
3847 xfr_transfer_current_master(struct auth_xfer* xfr)
3849 if(xfr->task_transfer->scan_specific)
3850 return xfr->task_transfer->scan_specific;
3851 return xfr->task_transfer->scan_target;
3854 /** pick up the master that is being scanned right now, task_probe */
3855 static struct auth_master*
3856 xfr_probe_current_master(struct auth_xfer* xfr)
3858 if(xfr->task_probe->scan_specific)
3859 return xfr->task_probe->scan_specific;
3860 return xfr->task_probe->scan_target;
3863 /** true if at end of list, task_transfer */
3865 xfr_transfer_end_of_list(struct auth_xfer* xfr)
3867 return !xfr->task_transfer->scan_specific &&
3868 !xfr->task_transfer->scan_target;
3871 /** true if at end of list, task_probe */
3873 xfr_probe_end_of_list(struct auth_xfer* xfr)
3875 return !xfr->task_probe->scan_specific && !xfr->task_probe->scan_target;
3878 /** move to next master in list, task_transfer */
3880 xfr_transfer_nextmaster(struct auth_xfer* xfr)
3882 if(!xfr->task_transfer->scan_specific &&
3883 !xfr->task_transfer->scan_target)
3885 if(xfr->task_transfer->scan_addr) {
3886 xfr->task_transfer->scan_addr =
3887 xfr->task_transfer->scan_addr->next;
3888 if(xfr->task_transfer->scan_addr)
3891 if(xfr->task_transfer->scan_specific) {
3892 xfr->task_transfer->scan_specific = NULL;
3893 xfr->task_transfer->scan_target = xfr->task_transfer->masters;
3894 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3896 xfr->task_transfer->scan_addr =
3897 xfr->task_transfer->scan_target->list;
3900 if(!xfr->task_transfer->scan_target)
3902 xfr->task_transfer->scan_target = xfr->task_transfer->scan_target->next;
3903 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3905 xfr->task_transfer->scan_addr =
3906 xfr->task_transfer->scan_target->list;
3910 /** move to next master in list, task_probe */
3912 xfr_probe_nextmaster(struct auth_xfer* xfr)
3914 if(!xfr->task_probe->scan_specific && !xfr->task_probe->scan_target)
3916 if(xfr->task_probe->scan_addr) {
3917 xfr->task_probe->scan_addr = xfr->task_probe->scan_addr->next;
3918 if(xfr->task_probe->scan_addr)
3921 if(xfr->task_probe->scan_specific) {
3922 xfr->task_probe->scan_specific = NULL;
3923 xfr->task_probe->scan_target = xfr->task_probe->masters;
3924 if(xfr->task_probe->scan_target && xfr->task_probe->
3926 xfr->task_probe->scan_addr =
3927 xfr->task_probe->scan_target->list;
3930 if(!xfr->task_probe->scan_target)
3932 xfr->task_probe->scan_target = xfr->task_probe->scan_target->next;
3933 if(xfr->task_probe->scan_target && xfr->task_probe->
3935 xfr->task_probe->scan_addr =
3936 xfr->task_probe->scan_target->list;
3940 /** create SOA probe packet for xfr */
3942 xfr_create_soa_probe_packet(struct auth_xfer* xfr, sldns_buffer* buf,
3945 struct query_info qinfo;
3947 memset(&qinfo, 0, sizeof(qinfo));
3948 qinfo.qname = xfr->name;
3949 qinfo.qname_len = xfr->namelen;
3950 qinfo.qtype = LDNS_RR_TYPE_SOA;
3951 qinfo.qclass = xfr->dclass;
3952 qinfo_query_encode(buf, &qinfo);
3953 sldns_buffer_write_u16_at(buf, 0, id);
3956 /** create IXFR/AXFR packet for xfr */
3958 xfr_create_ixfr_packet(struct auth_xfer* xfr, sldns_buffer* buf, uint16_t id,
3959 struct auth_master* master)
3961 struct query_info qinfo;
3964 have_zone = xfr->have_zone;
3965 serial = xfr->serial;
3967 memset(&qinfo, 0, sizeof(qinfo));
3968 qinfo.qname = xfr->name;
3969 qinfo.qname_len = xfr->namelen;
3970 xfr->task_transfer->got_xfr_serial = 0;
3971 xfr->task_transfer->rr_scan_num = 0;
3972 xfr->task_transfer->incoming_xfr_serial = 0;
3973 xfr->task_transfer->on_ixfr_is_axfr = 0;
3974 xfr->task_transfer->on_ixfr = 1;
3975 qinfo.qtype = LDNS_RR_TYPE_IXFR;
3976 if(!have_zone || xfr->task_transfer->ixfr_fail || !master->ixfr) {
3977 qinfo.qtype = LDNS_RR_TYPE_AXFR;
3978 xfr->task_transfer->ixfr_fail = 0;
3979 xfr->task_transfer->on_ixfr = 0;
3982 qinfo.qclass = xfr->dclass;
3983 qinfo_query_encode(buf, &qinfo);
3984 sldns_buffer_write_u16_at(buf, 0, id);
3986 /* append serial for IXFR */
3987 if(qinfo.qtype == LDNS_RR_TYPE_IXFR) {
3988 size_t end = sldns_buffer_limit(buf);
3989 sldns_buffer_clear(buf);
3990 sldns_buffer_set_position(buf, end);
3991 /* auth section count 1 */
3992 sldns_buffer_write_u16_at(buf, LDNS_NSCOUNT_OFF, 1);
3994 sldns_buffer_write_u8(buf, 0xC0); /* compressed ptr to qname */
3995 sldns_buffer_write_u8(buf, 0x0C);
3996 sldns_buffer_write_u16(buf, LDNS_RR_TYPE_SOA);
3997 sldns_buffer_write_u16(buf, qinfo.qclass);
3998 sldns_buffer_write_u32(buf, 0); /* ttl */
3999 sldns_buffer_write_u16(buf, 22); /* rdata length */
4000 sldns_buffer_write_u8(buf, 0); /* . */
4001 sldns_buffer_write_u8(buf, 0); /* . */
4002 sldns_buffer_write_u32(buf, serial); /* serial */
4003 sldns_buffer_write_u32(buf, 0); /* refresh */
4004 sldns_buffer_write_u32(buf, 0); /* retry */
4005 sldns_buffer_write_u32(buf, 0); /* expire */
4006 sldns_buffer_write_u32(buf, 0); /* minimum */
4007 sldns_buffer_flip(buf);
4011 /** check if returned packet is OK */
4013 check_packet_ok(sldns_buffer* pkt, uint16_t qtype, struct auth_xfer* xfr,
4016 /* parse to see if packet worked, valid reply */
4018 /* check serial number of SOA */
4019 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE)
4023 if(LDNS_ID_WIRE(sldns_buffer_begin(pkt)) != xfr->task_probe->id)
4026 /* check flag bits and rcode */
4027 if(!LDNS_QR_WIRE(sldns_buffer_begin(pkt)))
4029 if(LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_QUERY)
4031 if(LDNS_RCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_RCODE_NOERROR)
4035 if(LDNS_QDCOUNT(sldns_buffer_begin(pkt)) != 1)
4037 sldns_buffer_skip(pkt, LDNS_HEADER_SIZE);
4038 if(sldns_buffer_remaining(pkt) < xfr->namelen)
4040 if(query_dname_compare(sldns_buffer_current(pkt), xfr->name) != 0)
4042 sldns_buffer_skip(pkt, (ssize_t)xfr->namelen);
4044 /* check qtype, qclass */
4045 if(sldns_buffer_remaining(pkt) < 4)
4047 if(sldns_buffer_read_u16(pkt) != qtype)
4049 if(sldns_buffer_read_u16(pkt) != xfr->dclass)
4054 /* read serial number, from answer section SOA */
4055 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) == 0)
4057 /* read from first record SOA record */
4058 if(sldns_buffer_remaining(pkt) < 1)
4060 if(dname_pkt_compare(pkt, sldns_buffer_current(pkt),
4063 if(!pkt_dname_len(pkt))
4065 /* type, class, ttl, rdatalen */
4066 if(sldns_buffer_remaining(pkt) < 4+4+2)
4068 if(sldns_buffer_read_u16(pkt) != qtype)
4070 if(sldns_buffer_read_u16(pkt) != xfr->dclass)
4072 sldns_buffer_skip(pkt, 4); /* ttl */
4073 rdlen = sldns_buffer_read_u16(pkt);
4074 if(sldns_buffer_remaining(pkt) < rdlen)
4076 if(sldns_buffer_remaining(pkt) < 1)
4078 if(!pkt_dname_len(pkt)) /* soa name */
4080 if(sldns_buffer_remaining(pkt) < 1)
4082 if(!pkt_dname_len(pkt)) /* soa name */
4084 if(sldns_buffer_remaining(pkt) < 20)
4086 *serial = sldns_buffer_read_u32(pkt);
4091 /** read one line from chunks into buffer at current position */
4093 chunkline_get_line(struct auth_chunk** chunk, size_t* chunk_pos,
4098 /* more text in this chunk? */
4099 if(*chunk_pos < (*chunk)->len) {
4101 while(*chunk_pos < (*chunk)->len) {
4102 char c = (char)((*chunk)->data[*chunk_pos]);
4104 if(sldns_buffer_remaining(buf) < 2) {
4105 /* buffer too short */
4106 verbose(VERB_ALGO, "http chunkline, "
4110 sldns_buffer_write_u8(buf, (uint8_t)c);
4117 /* move to next chunk */
4118 *chunk = (*chunk)->next;
4122 if(readsome) return 1;
4126 /** count number of open and closed parenthesis in a chunkline */
4128 chunkline_count_parens(sldns_buffer* buf, size_t start)
4130 size_t end = sldns_buffer_position(buf);
4133 int squote = 0, dquote = 0;
4134 for(i=start; i<end; i++) {
4135 char c = (char)sldns_buffer_read_u8_at(buf, i);
4136 if(squote && c != '\'') continue;
4137 if(dquote && c != '"') continue;
4139 dquote = !dquote; /* skip quoted part */
4141 squote = !squote; /* skip quoted part */
4147 /* rest is a comment */
4154 /** remove trailing ;... comment from a line in the chunkline buffer */
4156 chunkline_remove_trailcomment(sldns_buffer* buf, size_t start)
4158 size_t end = sldns_buffer_position(buf);
4160 int squote = 0, dquote = 0;
4161 for(i=start; i<end; i++) {
4162 char c = (char)sldns_buffer_read_u8_at(buf, i);
4163 if(squote && c != '\'') continue;
4164 if(dquote && c != '"') continue;
4166 dquote = !dquote; /* skip quoted part */
4168 squote = !squote; /* skip quoted part */
4170 /* rest is a comment */
4171 sldns_buffer_set_position(buf, i);
4175 /* nothing to remove */
4178 /** see if a chunkline is a comment line (or empty line) */
4180 chunkline_is_comment_line_or_empty(sldns_buffer* buf)
4182 size_t i, end = sldns_buffer_limit(buf);
4183 for(i=0; i<end; i++) {
4184 char c = (char)sldns_buffer_read_u8_at(buf, i);
4186 return 1; /* comment */
4187 else if(c != ' ' && c != '\t' && c != '\r' && c != '\n')
4188 return 0; /* not a comment */
4190 return 1; /* empty */
4193 /** find a line with ( ) collated */
4195 chunkline_get_line_collated(struct auth_chunk** chunk, size_t* chunk_pos,
4200 sldns_buffer_clear(buf);
4201 pos = sldns_buffer_position(buf);
4202 if(!chunkline_get_line(chunk, chunk_pos, buf)) {
4203 if(sldns_buffer_position(buf) < sldns_buffer_limit(buf))
4204 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4205 else sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf)-1, 0);
4206 sldns_buffer_flip(buf);
4209 parens += chunkline_count_parens(buf, pos);
4211 chunkline_remove_trailcomment(buf, pos);
4212 pos = sldns_buffer_position(buf);
4213 if(!chunkline_get_line(chunk, chunk_pos, buf)) {
4214 if(sldns_buffer_position(buf) < sldns_buffer_limit(buf))
4215 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4216 else sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf)-1, 0);
4217 sldns_buffer_flip(buf);
4220 parens += chunkline_count_parens(buf, pos);
4223 if(sldns_buffer_remaining(buf) < 1) {
4224 verbose(VERB_ALGO, "http chunkline: "
4228 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4229 sldns_buffer_flip(buf);
4233 /** process $ORIGIN for http */
4235 http_parse_origin(sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4237 char* line = (char*)sldns_buffer_begin(buf);
4238 if(strncmp(line, "$ORIGIN", 7) == 0 &&
4239 isspace((unsigned char)line[7])) {
4241 pstate->origin_len = sizeof(pstate->origin);
4242 s = sldns_str2wire_dname_buf(sldns_strip_ws(line+8),
4243 pstate->origin, &pstate->origin_len);
4244 if(s) pstate->origin_len = 0;
4250 /** process $TTL for http */
4252 http_parse_ttl(sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4254 char* line = (char*)sldns_buffer_begin(buf);
4255 if(strncmp(line, "$TTL", 4) == 0 &&
4256 isspace((unsigned char)line[4])) {
4257 const char* end = NULL;
4258 pstate->default_ttl = sldns_str2period(
4259 sldns_strip_ws(line+5), &end);
4265 /** find noncomment RR line in chunks, collates lines if ( ) format */
4267 chunkline_non_comment_RR(struct auth_chunk** chunk, size_t* chunk_pos,
4268 sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4270 while(chunkline_get_line_collated(chunk, chunk_pos, buf)) {
4271 if(chunkline_is_comment_line_or_empty(buf)) {
4272 /* a comment, go to next line */
4275 if(http_parse_origin(buf, pstate)) {
4276 continue; /* $ORIGIN has been handled */
4278 if(http_parse_ttl(buf, pstate)) {
4279 continue; /* $TTL has been handled */
4283 /* no noncomments, fail */
4287 /** check syntax of chunklist zonefile, parse first RR, return false on
4288 * failure and return a string in the scratch buffer (first RR string)
4291 http_zonefile_syntax_check(struct auth_xfer* xfr, sldns_buffer* buf)
4293 uint8_t rr[LDNS_RR_BUF_SIZE];
4294 size_t rr_len, dname_len = 0;
4295 struct sldns_file_parse_state pstate;
4296 struct auth_chunk* chunk;
4299 memset(&pstate, 0, sizeof(pstate));
4300 pstate.default_ttl = 3600;
4301 if(xfr->namelen < sizeof(pstate.origin)) {
4302 pstate.origin_len = xfr->namelen;
4303 memmove(pstate.origin, xfr->name, xfr->namelen);
4305 chunk = xfr->task_transfer->chunks_first;
4307 if(!chunkline_non_comment_RR(&chunk, &chunk_pos, buf, &pstate)) {
4310 rr_len = sizeof(rr);
4311 e=sldns_str2wire_rr_buf((char*)sldns_buffer_begin(buf), rr, &rr_len,
4312 &dname_len, pstate.default_ttl,
4313 pstate.origin_len?pstate.origin:NULL, pstate.origin_len,
4314 pstate.prev_rr_len?pstate.prev_rr:NULL, pstate.prev_rr_len);
4316 log_err("parse failure on first RR[%d]: %s",
4317 LDNS_WIREPARSE_OFFSET(e),
4318 sldns_get_errorstr_parse(LDNS_WIREPARSE_ERROR(e)));
4321 /* check that class is correct */
4322 if(sldns_wirerr_get_class(rr, rr_len, dname_len) != xfr->dclass) {
4323 log_err("parse failure: first record in downloaded zonefile "
4324 "from wrong RR class");
4330 /** sum sizes of chunklist */
4332 chunklist_sum(struct auth_chunk* list)
4334 struct auth_chunk* p;
4336 for(p=list; p; p=p->next) {
4342 /** remove newlines from collated line */
4344 chunkline_newline_removal(sldns_buffer* buf)
4346 size_t i, end=sldns_buffer_limit(buf);
4347 for(i=0; i<end; i++) {
4348 char c = (char)sldns_buffer_read_u8_at(buf, i);
4349 if(c == '\n' && i==end-1) {
4350 sldns_buffer_write_u8_at(buf, i, 0);
4351 sldns_buffer_set_limit(buf, end-1);
4355 sldns_buffer_write_u8_at(buf, i, (uint8_t)' ');
4359 /** for http download, parse and add RR to zone */
4361 http_parse_add_rr(struct auth_xfer* xfr, struct auth_zone* z,
4362 sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4364 uint8_t rr[LDNS_RR_BUF_SIZE];
4365 size_t rr_len, dname_len = 0;
4367 char* line = (char*)sldns_buffer_begin(buf);
4368 rr_len = sizeof(rr);
4369 e = sldns_str2wire_rr_buf(line, rr, &rr_len, &dname_len,
4370 pstate->default_ttl,
4371 pstate->origin_len?pstate->origin:NULL, pstate->origin_len,
4372 pstate->prev_rr_len?pstate->prev_rr:NULL, pstate->prev_rr_len);
4374 log_err("%s/%s parse failure RR[%d]: %s in '%s'",
4375 xfr->task_transfer->master->host,
4376 xfr->task_transfer->master->file,
4377 LDNS_WIREPARSE_OFFSET(e),
4378 sldns_get_errorstr_parse(LDNS_WIREPARSE_ERROR(e)),
4383 return 1; /* empty line or so */
4386 if(dname_len < sizeof(pstate->prev_rr)) {
4387 memmove(pstate->prev_rr, rr, dname_len);
4388 pstate->prev_rr_len = dname_len;
4391 return az_insert_rr(z, rr, rr_len, dname_len, NULL);
4394 /** RR list iterator, returns RRs from answer section one by one from the
4395 * dns packets in the chunklist */
4397 chunk_rrlist_start(struct auth_xfer* xfr, struct auth_chunk** rr_chunk,
4398 int* rr_num, size_t* rr_pos)
4400 *rr_chunk = xfr->task_transfer->chunks_first;
4405 /** RR list iterator, see if we are at the end of the list */
4407 chunk_rrlist_end(struct auth_chunk* rr_chunk, int rr_num)
4410 if(rr_chunk->len < LDNS_HEADER_SIZE)
4412 if(rr_num < (int)LDNS_ANCOUNT(rr_chunk->data))
4414 /* no more RRs in this chunk */
4415 /* continue with next chunk, see if it has RRs */
4416 rr_chunk = rr_chunk->next;
4422 /** RR list iterator, move to next RR */
4424 chunk_rrlist_gonext(struct auth_chunk** rr_chunk, int* rr_num,
4425 size_t* rr_pos, size_t rr_nextpos)
4427 /* already at end of chunks? */
4430 /* move within this chunk */
4431 if((*rr_chunk)->len >= LDNS_HEADER_SIZE &&
4432 (*rr_num)+1 < (int)LDNS_ANCOUNT((*rr_chunk)->data)) {
4434 *rr_pos = rr_nextpos;
4437 /* no more RRs in this chunk */
4438 /* continue with next chunk, see if it has RRs */
4440 *rr_chunk = (*rr_chunk)->next;
4444 if((*rr_chunk)->len >= LDNS_HEADER_SIZE &&
4445 LDNS_ANCOUNT((*rr_chunk)->data) > 0) {
4448 *rr_chunk = (*rr_chunk)->next;
4452 /** RR iterator, get current RR information, false on parse error */
4454 chunk_rrlist_get_current(struct auth_chunk* rr_chunk, int rr_num,
4455 size_t rr_pos, uint8_t** rr_dname, uint16_t* rr_type,
4456 uint16_t* rr_class, uint32_t* rr_ttl, uint16_t* rr_rdlen,
4457 uint8_t** rr_rdata, size_t* rr_nextpos)
4460 /* integrity checks on position */
4461 if(!rr_chunk) return 0;
4462 if(rr_chunk->len < LDNS_HEADER_SIZE) return 0;
4463 if(rr_num >= (int)LDNS_ANCOUNT(rr_chunk->data)) return 0;
4464 if(rr_pos >= rr_chunk->len) return 0;
4466 /* fetch rr information */
4467 sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
4470 /* skip question section */
4471 sldns_buffer_set_position(&pkt, LDNS_HEADER_SIZE);
4472 for(i=0; i<LDNS_QDCOUNT(rr_chunk->data); i++) {
4473 if(pkt_dname_len(&pkt) == 0) return 0;
4474 if(sldns_buffer_remaining(&pkt) < 4) return 0;
4475 sldns_buffer_skip(&pkt, 4); /* type and class */
4478 sldns_buffer_set_position(&pkt, rr_pos);
4480 *rr_dname = sldns_buffer_current(&pkt);
4481 if(pkt_dname_len(&pkt) == 0) return 0;
4482 if(sldns_buffer_remaining(&pkt) < 10) return 0;
4483 *rr_type = sldns_buffer_read_u16(&pkt);
4484 *rr_class = sldns_buffer_read_u16(&pkt);
4485 *rr_ttl = sldns_buffer_read_u32(&pkt);
4486 *rr_rdlen = sldns_buffer_read_u16(&pkt);
4487 if(sldns_buffer_remaining(&pkt) < (*rr_rdlen)) return 0;
4488 *rr_rdata = sldns_buffer_current(&pkt);
4489 sldns_buffer_skip(&pkt, (ssize_t)(*rr_rdlen));
4490 *rr_nextpos = sldns_buffer_position(&pkt);
4494 /** print log message where we are in parsing the zone transfer */
4496 log_rrlist_position(const char* label, struct auth_chunk* rr_chunk,
4497 uint8_t* rr_dname, uint16_t rr_type, size_t rr_counter)
4504 sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
4505 sldns_buffer_set_position(&pkt, (size_t)(rr_dname -
4506 sldns_buffer_begin(&pkt)));
4507 if((dlen=pkt_dname_len(&pkt)) == 0) return;
4508 if(dlen >= sizeof(buf)) return;
4509 dname_pkt_copy(&pkt, buf, rr_dname);
4510 dname_str(buf, str);
4511 (void)sldns_wire2str_type_buf(rr_type, typestr, sizeof(typestr));
4512 verbose(VERB_ALGO, "%s at[%d] %s %s", label, (int)rr_counter,
4516 /** check that start serial is OK for ixfr. we are at rr_counter == 0,
4517 * and we are going to check rr_counter == 1 (has to be type SOA) serial */
4519 ixfr_start_serial(struct auth_chunk* rr_chunk, int rr_num, size_t rr_pos,
4520 uint8_t* rr_dname, uint16_t rr_type, uint16_t rr_class,
4521 uint32_t rr_ttl, uint16_t rr_rdlen, uint8_t* rr_rdata,
4522 size_t rr_nextpos, uint32_t transfer_serial, uint32_t xfr_serial)
4524 uint32_t startserial;
4525 /* move forward on RR */
4526 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4527 if(chunk_rrlist_end(rr_chunk, rr_num)) {
4529 verbose(VERB_OPS, "IXFR has no second SOA record");
4532 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4533 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4534 &rr_rdata, &rr_nextpos)) {
4535 verbose(VERB_OPS, "IXFR cannot parse second SOA record");
4536 /* failed to parse RR */
4539 if(rr_type != LDNS_RR_TYPE_SOA) {
4540 verbose(VERB_OPS, "IXFR second record is not type SOA");
4544 verbose(VERB_OPS, "IXFR, second SOA has short rdlength");
4545 return 0; /* bad SOA rdlen */
4547 startserial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4548 if(startserial == transfer_serial) {
4549 /* empty AXFR, not an IXFR */
4550 verbose(VERB_OPS, "IXFR second serial same as first");
4553 if(startserial != xfr_serial) {
4554 /* wrong start serial, it does not match the serial in
4556 verbose(VERB_OPS, "IXFR is from serial %u to %u but %u "
4557 "in memory, rejecting the zone transfer",
4558 (unsigned)startserial, (unsigned)transfer_serial,
4559 (unsigned)xfr_serial);
4562 /* everything OK in second SOA serial */
4566 /** apply IXFR to zone in memory. z is locked. false on failure(mallocfail) */
4568 apply_ixfr(struct auth_xfer* xfr, struct auth_zone* z,
4569 struct sldns_buffer* scratch_buffer)
4571 struct auth_chunk* rr_chunk;
4574 uint8_t* rr_dname, *rr_rdata;
4575 uint16_t rr_type, rr_class, rr_rdlen;
4578 int have_transfer_serial = 0;
4579 uint32_t transfer_serial = 0;
4580 size_t rr_counter = 0;
4584 /* start RR iterator over chunklist of packets */
4585 chunk_rrlist_start(xfr, &rr_chunk, &rr_num, &rr_pos);
4586 while(!chunk_rrlist_end(rr_chunk, rr_num)) {
4587 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4588 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4589 &rr_rdata, &rr_nextpos)) {
4590 /* failed to parse RR */
4593 if(verbosity>=7) log_rrlist_position("apply ixfr",
4594 rr_chunk, rr_dname, rr_type, rr_counter);
4595 /* twiddle add/del mode and check for start and end */
4596 if(rr_counter == 0 && rr_type != LDNS_RR_TYPE_SOA)
4598 if(rr_counter == 1 && rr_type != LDNS_RR_TYPE_SOA) {
4599 /* this is an AXFR returned from the IXFR master */
4600 /* but that should already have been detected, by
4601 * on_ixfr_is_axfr */
4604 if(rr_type == LDNS_RR_TYPE_SOA) {
4606 if(rr_rdlen < 22) return 0; /* bad SOA rdlen */
4607 serial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4608 if(have_transfer_serial == 0) {
4609 have_transfer_serial = 1;
4610 transfer_serial = serial;
4611 delmode = 1; /* gets negated below */
4612 /* check second RR before going any further */
4613 if(!ixfr_start_serial(rr_chunk, rr_num, rr_pos,
4614 rr_dname, rr_type, rr_class, rr_ttl,
4615 rr_rdlen, rr_rdata, rr_nextpos,
4616 transfer_serial, xfr->serial)) {
4619 } else if(transfer_serial == serial) {
4620 have_transfer_serial++;
4621 if(rr_counter == 1) {
4622 /* empty AXFR, with SOA; SOA; */
4623 /* should have been detected by
4624 * on_ixfr_is_axfr */
4627 if(have_transfer_serial == 3) {
4628 /* see serial three times for end */
4631 * SOA 1 second RR, followed by del
4632 * SOA 2 followed by add
4633 * SOA 2 followed by del
4634 * SOA 3 followed by add
4636 /* ended by SOA record */
4637 xfr->serial = transfer_serial;
4641 /* twiddle add/del mode */
4642 /* switch from delete part to add part and back again
4643 * just before the soa, it gets deleted and added too
4644 * this means we switch to delete mode for the final
4645 * SOA(so skip that one) */
4648 /* process this RR */
4649 /* if the RR is deleted twice or added twice, then we
4650 * softfail, and continue with the rest of the IXFR, so
4651 * that we serve something fairly nice during the refetch */
4652 if(verbosity>=7) log_rrlist_position((delmode?"del":"add"),
4653 rr_chunk, rr_dname, rr_type, rr_counter);
4655 /* delete this RR */
4657 if(!az_remove_rr_decompress(z, rr_chunk->data,
4658 rr_chunk->len, scratch_buffer, rr_dname,
4659 rr_type, rr_class, rr_ttl, rr_rdata, rr_rdlen,
4661 /* failed, malloc error or so */
4665 /* it was removal of a nonexisting RR */
4666 if(verbosity>=4) log_rrlist_position(
4667 "IXFR error nonexistent RR",
4668 rr_chunk, rr_dname, rr_type, rr_counter);
4671 } else if(rr_counter != 0) {
4672 /* skip first SOA RR for addition, it is added in
4673 * the addition part near the end of the ixfr, when
4674 * that serial is seen the second time. */
4677 if(!az_insert_rr_decompress(z, rr_chunk->data,
4678 rr_chunk->len, scratch_buffer, rr_dname,
4679 rr_type, rr_class, rr_ttl, rr_rdata, rr_rdlen,
4681 /* failed, malloc error or so */
4685 /* it was a duplicate */
4686 if(verbosity>=4) log_rrlist_position(
4687 "IXFR error duplicate RR",
4688 rr_chunk, rr_dname, rr_type, rr_counter);
4694 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4697 verbose(VERB_ALGO, "IXFR did not apply cleanly, fetching full zone");
4703 /** apply AXFR to zone in memory. z is locked. false on failure(mallocfail) */
4705 apply_axfr(struct auth_xfer* xfr, struct auth_zone* z,
4706 struct sldns_buffer* scratch_buffer)
4708 struct auth_chunk* rr_chunk;
4711 uint8_t* rr_dname, *rr_rdata;
4712 uint16_t rr_type, rr_class, rr_rdlen;
4714 uint32_t serial = 0;
4716 size_t rr_counter = 0;
4717 int have_end_soa = 0;
4719 /* clear the data tree */
4720 traverse_postorder(&z->data, auth_data_del, NULL);
4721 rbtree_init(&z->data, &auth_data_cmp);
4722 /* clear the RPZ policies */
4729 /* insert all RRs in to the zone */
4730 /* insert the SOA only once, skip the last one */
4731 /* start RR iterator over chunklist of packets */
4732 chunk_rrlist_start(xfr, &rr_chunk, &rr_num, &rr_pos);
4733 while(!chunk_rrlist_end(rr_chunk, rr_num)) {
4734 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4735 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4736 &rr_rdata, &rr_nextpos)) {
4737 /* failed to parse RR */
4740 if(verbosity>=7) log_rrlist_position("apply_axfr",
4741 rr_chunk, rr_dname, rr_type, rr_counter);
4742 if(rr_type == LDNS_RR_TYPE_SOA) {
4743 if(rr_counter != 0) {
4744 /* end of the axfr */
4748 if(rr_rdlen < 22) return 0; /* bad SOA rdlen */
4749 serial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4753 if(!az_insert_rr_decompress(z, rr_chunk->data, rr_chunk->len,
4754 scratch_buffer, rr_dname, rr_type, rr_class, rr_ttl,
4755 rr_rdata, rr_rdlen, NULL)) {
4756 /* failed, malloc error or so */
4761 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4764 log_err("no end SOA record for AXFR");
4768 xfr->serial = serial;
4773 /** apply HTTP to zone in memory. z is locked. false on failure(mallocfail) */
4775 apply_http(struct auth_xfer* xfr, struct auth_zone* z,
4776 struct sldns_buffer* scratch_buffer)
4778 /* parse data in chunks */
4779 /* parse RR's and read into memory. ignore $INCLUDE from the
4781 struct sldns_file_parse_state pstate;
4782 struct auth_chunk* chunk;
4784 memset(&pstate, 0, sizeof(pstate));
4785 pstate.default_ttl = 3600;
4786 if(xfr->namelen < sizeof(pstate.origin)) {
4787 pstate.origin_len = xfr->namelen;
4788 memmove(pstate.origin, xfr->name, xfr->namelen);
4791 if(verbosity >= VERB_ALGO)
4792 verbose(VERB_ALGO, "http download %s of size %d",
4793 xfr->task_transfer->master->file,
4794 (int)chunklist_sum(xfr->task_transfer->chunks_first));
4795 if(xfr->task_transfer->chunks_first && verbosity >= VERB_ALGO) {
4797 if(xfr->task_transfer->chunks_first->len+1 > sizeof(preview)) {
4798 memmove(preview, xfr->task_transfer->chunks_first->data,
4800 preview[sizeof(preview)-1]=0;
4802 memmove(preview, xfr->task_transfer->chunks_first->data,
4803 xfr->task_transfer->chunks_first->len);
4804 preview[xfr->task_transfer->chunks_first->len]=0;
4806 log_info("auth zone http downloaded content preview: %s",
4810 /* perhaps a little syntax check before we try to apply the data? */
4811 if(!http_zonefile_syntax_check(xfr, scratch_buffer)) {
4812 log_err("http download %s/%s does not contain a zonefile, "
4813 "but got '%s'", xfr->task_transfer->master->host,
4814 xfr->task_transfer->master->file,
4815 sldns_buffer_begin(scratch_buffer));
4819 /* clear the data tree */
4820 traverse_postorder(&z->data, auth_data_del, NULL);
4821 rbtree_init(&z->data, &auth_data_cmp);
4822 /* clear the RPZ policies */
4829 chunk = xfr->task_transfer->chunks_first;
4832 while(chunkline_get_line_collated(&chunk, &chunk_pos, scratch_buffer)) {
4833 /* process this line */
4835 chunkline_newline_removal(scratch_buffer);
4836 if(chunkline_is_comment_line_or_empty(scratch_buffer)) {
4839 /* parse line and add RR */
4840 if(http_parse_origin(scratch_buffer, &pstate)) {
4841 continue; /* $ORIGIN has been handled */
4843 if(http_parse_ttl(scratch_buffer, &pstate)) {
4844 continue; /* $TTL has been handled */
4846 if(!http_parse_add_rr(xfr, z, scratch_buffer, &pstate)) {
4847 verbose(VERB_ALGO, "error parsing line [%s:%d] %s",
4848 xfr->task_transfer->master->file,
4850 sldns_buffer_begin(scratch_buffer));
4857 /** write http chunks to zonefile to create downloaded file */
4859 auth_zone_write_chunks(struct auth_xfer* xfr, const char* fname)
4862 struct auth_chunk* p;
4863 out = fopen(fname, "w");
4865 log_err("could not open %s: %s", fname, strerror(errno));
4868 for(p = xfr->task_transfer->chunks_first; p ; p = p->next) {
4869 if(!write_out(out, (char*)p->data, p->len)) {
4870 log_err("could not write http download to %s", fname);
4879 /** write to zonefile after zone has been updated */
4881 xfr_write_after_update(struct auth_xfer* xfr, struct module_env* env)
4883 struct config_file* cfg = env->cfg;
4884 struct auth_zone* z;
4887 lock_basic_unlock(&xfr->lock);
4889 /* get lock again, so it is a readlock and concurrently queries
4890 * can be answered */
4891 lock_rw_rdlock(&env->auth_zones->lock);
4892 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
4895 lock_rw_unlock(&env->auth_zones->lock);
4896 /* the zone is gone, ignore xfr results */
4897 lock_basic_lock(&xfr->lock);
4900 lock_rw_rdlock(&z->lock);
4901 lock_basic_lock(&xfr->lock);
4902 lock_rw_unlock(&env->auth_zones->lock);
4904 if(z->zonefile == NULL || z->zonefile[0] == 0) {
4905 lock_rw_unlock(&z->lock);
4906 /* no write needed, no zonefile set */
4909 zfilename = z->zonefile;
4910 if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(zfilename,
4911 cfg->chrootdir, strlen(cfg->chrootdir)) == 0)
4912 zfilename += strlen(cfg->chrootdir);
4913 if(verbosity >= VERB_ALGO) {
4915 dname_str(z->name, nm);
4916 verbose(VERB_ALGO, "write zonefile %s for %s", zfilename, nm);
4919 /* write to tempfile first */
4920 if((size_t)strlen(zfilename) + 16 > sizeof(tmpfile)) {
4921 verbose(VERB_ALGO, "tmpfilename too long, cannot update "
4922 " zonefile %s", zfilename);
4923 lock_rw_unlock(&z->lock);
4926 snprintf(tmpfile, sizeof(tmpfile), "%s.tmp%u", zfilename,
4927 (unsigned)getpid());
4928 if(xfr->task_transfer->master->http) {
4929 /* use the stored chunk list to write them */
4930 if(!auth_zone_write_chunks(xfr, tmpfile)) {
4932 lock_rw_unlock(&z->lock);
4935 } else if(!auth_zone_write_file(z, tmpfile)) {
4937 lock_rw_unlock(&z->lock);
4940 if(rename(tmpfile, zfilename) < 0) {
4941 log_err("could not rename(%s, %s): %s", tmpfile, zfilename,
4944 lock_rw_unlock(&z->lock);
4947 lock_rw_unlock(&z->lock);
4950 /** process chunk list and update zone in memory,
4951 * return false if it did not work */
4953 xfr_process_chunk_list(struct auth_xfer* xfr, struct module_env* env,
4956 struct auth_zone* z;
4958 /* obtain locks and structures */
4959 /* release xfr lock, then, while holding az->lock grab both
4960 * z->lock and xfr->lock */
4961 lock_basic_unlock(&xfr->lock);
4962 lock_rw_rdlock(&env->auth_zones->lock);
4963 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
4966 lock_rw_unlock(&env->auth_zones->lock);
4967 /* the zone is gone, ignore xfr results */
4968 lock_basic_lock(&xfr->lock);
4971 lock_rw_wrlock(&z->lock);
4972 lock_basic_lock(&xfr->lock);
4973 lock_rw_unlock(&env->auth_zones->lock);
4976 if(xfr->task_transfer->master->http) {
4977 if(!apply_http(xfr, z, env->scratch_buffer)) {
4978 lock_rw_unlock(&z->lock);
4979 verbose(VERB_ALGO, "http from %s: could not store data",
4980 xfr->task_transfer->master->host);
4983 } else if(xfr->task_transfer->on_ixfr &&
4984 !xfr->task_transfer->on_ixfr_is_axfr) {
4985 if(!apply_ixfr(xfr, z, env->scratch_buffer)) {
4986 lock_rw_unlock(&z->lock);
4987 verbose(VERB_ALGO, "xfr from %s: could not store IXFR"
4988 " data", xfr->task_transfer->master->host);
4993 if(!apply_axfr(xfr, z, env->scratch_buffer)) {
4994 lock_rw_unlock(&z->lock);
4995 verbose(VERB_ALGO, "xfr from %s: could not store AXFR"
4996 " data", xfr->task_transfer->master->host);
5000 xfr->zone_expired = 0;
5001 z->zone_expired = 0;
5002 if(!xfr_find_soa(z, xfr)) {
5003 lock_rw_unlock(&z->lock);
5004 verbose(VERB_ALGO, "xfr from %s: no SOA in zone after update"
5005 " (or malformed RR)", xfr->task_transfer->master->host);
5009 xfr->lease_time = *env->now;
5012 rpz_finish_config(z->rpz);
5015 lock_rw_unlock(&z->lock);
5017 if(verbosity >= VERB_QUERY && xfr->have_zone) {
5019 dname_str(xfr->name, zname);
5020 verbose(VERB_QUERY, "auth zone %s updated to serial %u", zname,
5021 (unsigned)xfr->serial);
5023 /* see if we need to write to a zonefile */
5024 xfr_write_after_update(xfr, env);
5028 /** disown task_transfer. caller must hold xfr.lock */
5030 xfr_transfer_disown(struct auth_xfer* xfr)
5032 /* remove timer (from this worker's event base) */
5033 comm_timer_delete(xfr->task_transfer->timer);
5034 xfr->task_transfer->timer = NULL;
5035 /* remove the commpoint */
5036 comm_point_delete(xfr->task_transfer->cp);
5037 xfr->task_transfer->cp = NULL;
5038 /* we don't own this item anymore */
5039 xfr->task_transfer->worker = NULL;
5040 xfr->task_transfer->env = NULL;
5043 /** lookup a host name for its addresses, if needed */
5045 xfr_transfer_lookup_host(struct auth_xfer* xfr, struct module_env* env)
5047 struct sockaddr_storage addr;
5048 socklen_t addrlen = 0;
5049 struct auth_master* master = xfr->task_transfer->lookup_target;
5050 struct query_info qinfo;
5051 uint16_t qflags = BIT_RD;
5052 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
5053 struct edns_data edns;
5054 sldns_buffer* buf = env->scratch_buffer;
5055 if(!master) return 0;
5056 if(extstrtoaddr(master->host, &addr, &addrlen)) {
5057 /* not needed, host is in IP addr format */
5060 if(master->allow_notify)
5061 return 0; /* allow-notifies are not transferred from, no
5064 /* use mesh_new_callback to probe for non-addr hosts,
5065 * and then wait for them to be looked up (in cache, or query) */
5066 qinfo.qname_len = sizeof(dname);
5067 if(sldns_str2wire_dname_buf(master->host, dname, &qinfo.qname_len)
5069 log_err("cannot parse host name of master %s", master->host);
5072 qinfo.qname = dname;
5073 qinfo.qclass = xfr->dclass;
5074 qinfo.qtype = LDNS_RR_TYPE_A;
5075 if(xfr->task_transfer->lookup_aaaa)
5076 qinfo.qtype = LDNS_RR_TYPE_AAAA;
5077 qinfo.local_alias = NULL;
5078 if(verbosity >= VERB_ALGO) {
5080 char buf2[LDNS_MAX_DOMAINLEN+1];
5081 dname_str(xfr->name, buf2);
5082 snprintf(buf1, sizeof(buf1), "auth zone %s: master lookup"
5083 " for task_transfer", buf2);
5084 log_query_info(VERB_ALGO, buf1, &qinfo);
5086 edns.edns_present = 1;
5088 edns.edns_version = 0;
5089 edns.bits = EDNS_DO;
5090 edns.opt_list = NULL;
5091 if(sldns_buffer_capacity(buf) < 65535)
5092 edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
5093 else edns.udp_size = 65535;
5095 /* unlock xfr during mesh_new_callback() because the callback can be
5096 * called straight away */
5097 lock_basic_unlock(&xfr->lock);
5098 if(!mesh_new_callback(env->mesh, &qinfo, qflags, &edns, buf, 0,
5099 &auth_xfer_transfer_lookup_callback, xfr)) {
5100 lock_basic_lock(&xfr->lock);
5101 log_err("out of memory lookup up master %s", master->host);
5104 lock_basic_lock(&xfr->lock);
5108 /** initiate TCP to the target and fetch zone.
5109 * returns true if that was successfully started, and timeout setup. */
5111 xfr_transfer_init_fetch(struct auth_xfer* xfr, struct module_env* env)
5113 struct sockaddr_storage addr;
5114 socklen_t addrlen = 0;
5115 struct auth_master* master = xfr->task_transfer->master;
5116 char *auth_name = NULL;
5119 if(!master) return 0;
5120 if(master->allow_notify) return 0; /* only for notify */
5122 /* get master addr */
5123 if(xfr->task_transfer->scan_addr) {
5124 addrlen = xfr->task_transfer->scan_addr->addrlen;
5125 memmove(&addr, &xfr->task_transfer->scan_addr->addr, addrlen);
5127 if(!authextstrtoaddr(master->host, &addr, &addrlen, &auth_name)) {
5128 /* the ones that are not in addr format are supposed
5129 * to be looked up. The lookup has failed however,
5132 dname_str(xfr->name, zname);
5133 log_err("%s: failed lookup, cannot transfer from master %s",
5134 zname, master->host);
5139 /* remove previous TCP connection (if any) */
5140 if(xfr->task_transfer->cp) {
5141 comm_point_delete(xfr->task_transfer->cp);
5142 xfr->task_transfer->cp = NULL;
5144 if(!xfr->task_transfer->timer) {
5145 xfr->task_transfer->timer = comm_timer_create(env->worker_base,
5146 auth_xfer_transfer_timer_callback, xfr);
5147 if(!xfr->task_transfer->timer) {
5148 log_err("malloc failure");
5152 timeout = AUTH_TRANSFER_TIMEOUT;
5154 t.tv_sec = timeout/1000;
5155 t.tv_usec = (timeout%1000)*1000;
5159 /* perform http fetch */
5160 /* store http port number into sockaddr,
5161 * unless someone used unbound's host@port notation */
5162 xfr->task_transfer->on_ixfr = 0;
5163 if(strchr(master->host, '@') == NULL)
5164 sockaddr_store_port(&addr, addrlen, master->port);
5165 xfr->task_transfer->cp = outnet_comm_point_for_http(
5166 env->outnet, auth_xfer_transfer_http_callback, xfr,
5167 &addr, addrlen, -1, master->ssl, master->host,
5169 if(!xfr->task_transfer->cp) {
5170 char zname[255+1], as[256];
5171 dname_str(xfr->name, zname);
5172 addr_to_str(&addr, addrlen, as, sizeof(as));
5173 verbose(VERB_ALGO, "cannot create http cp "
5174 "connection for %s to %s", zname, as);
5177 comm_timer_set(xfr->task_transfer->timer, &t);
5178 if(verbosity >= VERB_ALGO) {
5179 char zname[255+1], as[256];
5180 dname_str(xfr->name, zname);
5181 addr_to_str(&addr, addrlen, as, sizeof(as));
5182 verbose(VERB_ALGO, "auth zone %s transfer next HTTP fetch from %s started", zname, as);
5187 /* perform AXFR/IXFR */
5188 /* set the packet to be written */
5190 xfr->task_transfer->id = (uint16_t)(ub_random(env->rnd)&0xffff);
5191 xfr_create_ixfr_packet(xfr, env->scratch_buffer,
5192 xfr->task_transfer->id, master);
5195 xfr->task_transfer->cp = outnet_comm_point_for_tcp(env->outnet,
5196 auth_xfer_transfer_tcp_callback, xfr, &addr, addrlen,
5197 env->scratch_buffer, -1,
5198 auth_name != NULL, auth_name);
5199 if(!xfr->task_transfer->cp) {
5200 char zname[255+1], as[256];
5201 dname_str(xfr->name, zname);
5202 addr_to_str(&addr, addrlen, as, sizeof(as));
5203 verbose(VERB_ALGO, "cannot create tcp cp connection for "
5204 "xfr %s to %s", zname, as);
5207 comm_timer_set(xfr->task_transfer->timer, &t);
5208 if(verbosity >= VERB_ALGO) {
5209 char zname[255+1], as[256];
5210 dname_str(xfr->name, zname);
5211 addr_to_str(&addr, addrlen, as, sizeof(as));
5212 verbose(VERB_ALGO, "auth zone %s transfer next %s fetch from %s started", zname,
5213 (xfr->task_transfer->on_ixfr?"IXFR":"AXFR"), as);
5218 /** perform next lookup, next transfer TCP, or end and resume wait time task */
5220 xfr_transfer_nexttarget_or_end(struct auth_xfer* xfr, struct module_env* env)
5222 log_assert(xfr->task_transfer->worker == env->worker);
5224 /* are we performing lookups? */
5225 while(xfr->task_transfer->lookup_target) {
5226 if(xfr_transfer_lookup_host(xfr, env)) {
5227 /* wait for lookup to finish,
5228 * note that the hostname may be in unbound's cache
5229 * and we may then get an instant cache response,
5230 * and that calls the callback just like a full
5231 * lookup and lookup failures also call callback */
5232 if(verbosity >= VERB_ALGO) {
5234 dname_str(xfr->name, zname);
5235 verbose(VERB_ALGO, "auth zone %s transfer next target lookup", zname);
5237 lock_basic_unlock(&xfr->lock);
5240 xfr_transfer_move_to_next_lookup(xfr, env);
5243 /* initiate TCP and fetch the zone from the master */
5244 /* and set timeout on it */
5245 while(!xfr_transfer_end_of_list(xfr)) {
5246 xfr->task_transfer->master = xfr_transfer_current_master(xfr);
5247 if(xfr_transfer_init_fetch(xfr, env)) {
5248 /* successfully started, wait for callback */
5249 lock_basic_unlock(&xfr->lock);
5252 /* failed to fetch, next master */
5253 xfr_transfer_nextmaster(xfr);
5255 if(verbosity >= VERB_ALGO) {
5257 dname_str(xfr->name, zname);
5258 verbose(VERB_ALGO, "auth zone %s transfer failed, wait", zname);
5261 /* we failed to fetch the zone, move to wait task
5262 * use the shorter retry timeout */
5263 xfr_transfer_disown(xfr);
5265 /* pick up the nextprobe task and wait */
5266 if(xfr->task_nextprobe->worker == NULL)
5267 xfr_set_timeout(xfr, env, 1, 0);
5268 lock_basic_unlock(&xfr->lock);
5271 /** add addrs from A or AAAA rrset to the master */
5273 xfr_master_add_addrs(struct auth_master* m, struct ub_packed_rrset_key* rrset,
5277 struct packed_rrset_data* data;
5278 if(!m || !rrset) return;
5279 if(rrtype != LDNS_RR_TYPE_A && rrtype != LDNS_RR_TYPE_AAAA)
5281 data = (struct packed_rrset_data*)rrset->entry.data;
5282 for(i=0; i<data->count; i++) {
5283 struct auth_addr* a;
5284 size_t len = data->rr_len[i] - 2;
5285 uint8_t* rdata = data->rr_data[i]+2;
5286 if(rrtype == LDNS_RR_TYPE_A && len != INET_SIZE)
5287 continue; /* wrong length for A */
5288 if(rrtype == LDNS_RR_TYPE_AAAA && len != INET6_SIZE)
5289 continue; /* wrong length for AAAA */
5291 /* add and alloc it */
5292 a = (struct auth_addr*)calloc(1, sizeof(*a));
5294 log_err("out of memory");
5297 if(rrtype == LDNS_RR_TYPE_A) {
5298 struct sockaddr_in* sa;
5299 a->addrlen = (socklen_t)sizeof(*sa);
5300 sa = (struct sockaddr_in*)&a->addr;
5301 sa->sin_family = AF_INET;
5302 sa->sin_port = (in_port_t)htons(UNBOUND_DNS_PORT);
5303 memmove(&sa->sin_addr, rdata, INET_SIZE);
5305 struct sockaddr_in6* sa;
5306 a->addrlen = (socklen_t)sizeof(*sa);
5307 sa = (struct sockaddr_in6*)&a->addr;
5308 sa->sin6_family = AF_INET6;
5309 sa->sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT);
5310 memmove(&sa->sin6_addr, rdata, INET6_SIZE);
5312 if(verbosity >= VERB_ALGO) {
5314 addr_to_str(&a->addr, a->addrlen, s, sizeof(s));
5315 verbose(VERB_ALGO, "auth host %s lookup %s",
5318 /* append to list */
5324 /** callback for task_transfer lookup of host name, of A or AAAA */
5325 void auth_xfer_transfer_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
5326 enum sec_status ATTR_UNUSED(sec), char* ATTR_UNUSED(why_bogus),
5327 int ATTR_UNUSED(was_ratelimited))
5329 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5330 struct module_env* env;
5331 log_assert(xfr->task_transfer);
5332 lock_basic_lock(&xfr->lock);
5333 env = xfr->task_transfer->env;
5334 if(env->outnet->want_to_quit) {
5335 lock_basic_unlock(&xfr->lock);
5336 return; /* stop on quit */
5339 /* process result */
5340 if(rcode == LDNS_RCODE_NOERROR) {
5341 uint16_t wanted_qtype = LDNS_RR_TYPE_A;
5342 struct regional* temp = env->scratch;
5343 struct query_info rq;
5344 struct reply_info* rep;
5345 if(xfr->task_transfer->lookup_aaaa)
5346 wanted_qtype = LDNS_RR_TYPE_AAAA;
5347 memset(&rq, 0, sizeof(rq));
5348 rep = parse_reply_in_temp_region(buf, temp, &rq);
5349 if(rep && rq.qtype == wanted_qtype &&
5350 FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_NOERROR) {
5351 /* parsed successfully */
5352 struct ub_packed_rrset_key* answer =
5353 reply_find_answer_rrset(&rq, rep);
5355 xfr_master_add_addrs(xfr->task_transfer->
5356 lookup_target, answer, wanted_qtype);
5358 if(verbosity >= VERB_ALGO) {
5360 dname_str(xfr->name, zname);
5361 verbose(VERB_ALGO, "auth zone %s host %s type %s transfer lookup has nodata", zname, xfr->task_transfer->lookup_target->host, (xfr->task_transfer->lookup_aaaa?"AAAA":"A"));
5365 if(verbosity >= VERB_ALGO) {
5367 dname_str(xfr->name, zname);
5368 verbose(VERB_ALGO, "auth zone %s host %s type %s transfer lookup has no answer", zname, xfr->task_transfer->lookup_target->host, (xfr->task_transfer->lookup_aaaa?"AAAA":"A"));
5372 if(verbosity >= VERB_ALGO) {
5374 dname_str(xfr->name, zname);
5375 verbose(VERB_ALGO, "auth zone %s host %s type %s transfer lookup failed", zname, xfr->task_transfer->lookup_target->host, (xfr->task_transfer->lookup_aaaa?"AAAA":"A"));
5378 if(xfr->task_transfer->lookup_target->list &&
5379 xfr->task_transfer->lookup_target == xfr_transfer_current_master(xfr))
5380 xfr->task_transfer->scan_addr = xfr->task_transfer->lookup_target->list;
5382 /* move to lookup AAAA after A lookup, move to next hostname lookup,
5383 * or move to fetch the zone, or, if nothing to do, end task_transfer */
5384 xfr_transfer_move_to_next_lookup(xfr, env);
5385 xfr_transfer_nexttarget_or_end(xfr, env);
5388 /** check if xfer (AXFR or IXFR) packet is OK.
5389 * return false if we lost connection (SERVFAIL, or unreadable).
5390 * return false if we need to move from IXFR to AXFR, with gonextonfail
5391 * set to false, so the same master is tried again, but with AXFR.
5392 * return true if fine to link into data.
5393 * return true with transferdone=true when the transfer has ended.
5396 check_xfer_packet(sldns_buffer* pkt, struct auth_xfer* xfr,
5397 int* gonextonfail, int* transferdone)
5399 uint8_t* wire = sldns_buffer_begin(pkt);
5401 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE) {
5402 verbose(VERB_ALGO, "xfr to %s failed, packet too small",
5403 xfr->task_transfer->master->host);
5406 if(!LDNS_QR_WIRE(wire)) {
5407 verbose(VERB_ALGO, "xfr to %s failed, packet has no QR flag",
5408 xfr->task_transfer->master->host);
5411 if(LDNS_TC_WIRE(wire)) {
5412 verbose(VERB_ALGO, "xfr to %s failed, packet has TC flag",
5413 xfr->task_transfer->master->host);
5417 if(LDNS_ID_WIRE(wire) != xfr->task_transfer->id) {
5418 verbose(VERB_ALGO, "xfr to %s failed, packet wrong ID",
5419 xfr->task_transfer->master->host);
5422 if(LDNS_RCODE_WIRE(wire) != LDNS_RCODE_NOERROR) {
5424 sldns_wire2str_rcode_buf((int)LDNS_RCODE_WIRE(wire), rcode,
5426 /* if we are doing IXFR, check for fallback */
5427 if(xfr->task_transfer->on_ixfr) {
5428 if(LDNS_RCODE_WIRE(wire) == LDNS_RCODE_NOTIMPL ||
5429 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_SERVFAIL ||
5430 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_REFUSED ||
5431 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_FORMERR) {
5432 verbose(VERB_ALGO, "xfr to %s, fallback "
5433 "from IXFR to AXFR (with rcode %s)",
5434 xfr->task_transfer->master->host,
5436 xfr->task_transfer->ixfr_fail = 1;
5441 verbose(VERB_ALGO, "xfr to %s failed, packet with rcode %s",
5442 xfr->task_transfer->master->host, rcode);
5445 if(LDNS_OPCODE_WIRE(wire) != LDNS_PACKET_QUERY) {
5446 verbose(VERB_ALGO, "xfr to %s failed, packet with bad opcode",
5447 xfr->task_transfer->master->host);
5450 if(LDNS_QDCOUNT(wire) > 1) {
5451 verbose(VERB_ALGO, "xfr to %s failed, packet has qdcount %d",
5452 xfr->task_transfer->master->host,
5453 (int)LDNS_QDCOUNT(wire));
5458 sldns_buffer_set_position(pkt, LDNS_HEADER_SIZE);
5459 for(i=0; i<(int)LDNS_QDCOUNT(wire); i++) {
5460 size_t pos = sldns_buffer_position(pkt);
5461 uint16_t qtype, qclass;
5462 if(pkt_dname_len(pkt) == 0) {
5463 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5465 xfr->task_transfer->master->host);
5468 if(dname_pkt_compare(pkt, sldns_buffer_at(pkt, pos),
5470 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5472 xfr->task_transfer->master->host);
5475 if(sldns_buffer_remaining(pkt) < 4) {
5476 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5477 "truncated query RR",
5478 xfr->task_transfer->master->host);
5481 qtype = sldns_buffer_read_u16(pkt);
5482 qclass = sldns_buffer_read_u16(pkt);
5483 if(qclass != xfr->dclass) {
5484 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5486 xfr->task_transfer->master->host);
5489 if(xfr->task_transfer->on_ixfr) {
5490 if(qtype != LDNS_RR_TYPE_IXFR) {
5491 verbose(VERB_ALGO, "xfr to %s failed, packet "
5492 "with wrong qtype, expected IXFR",
5493 xfr->task_transfer->master->host);
5497 if(qtype != LDNS_RR_TYPE_AXFR) {
5498 verbose(VERB_ALGO, "xfr to %s failed, packet "
5499 "with wrong qtype, expected AXFR",
5500 xfr->task_transfer->master->host);
5506 /* check parse of RRs in packet, store first SOA serial
5507 * to be able to detect last SOA (with that serial) to see if done */
5508 /* also check for IXFR 'zone up to date' reply */
5509 for(i=0; i<(int)LDNS_ANCOUNT(wire); i++) {
5510 size_t pos = sldns_buffer_position(pkt);
5512 if(pkt_dname_len(pkt) == 0) {
5513 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5514 "malformed dname in answer section",
5515 xfr->task_transfer->master->host);
5518 if(sldns_buffer_remaining(pkt) < 10) {
5519 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5521 xfr->task_transfer->master->host);
5524 tp = sldns_buffer_read_u16(pkt);
5525 (void)sldns_buffer_read_u16(pkt); /* class */
5526 (void)sldns_buffer_read_u32(pkt); /* ttl */
5527 rdlen = sldns_buffer_read_u16(pkt);
5528 if(sldns_buffer_remaining(pkt) < rdlen) {
5529 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5530 "truncated RR rdata",
5531 xfr->task_transfer->master->host);
5535 /* RR parses (haven't checked rdata itself), now look at
5536 * SOA records to see serial number */
5537 if(xfr->task_transfer->rr_scan_num == 0 &&
5538 tp != LDNS_RR_TYPE_SOA) {
5539 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5540 "malformed zone transfer, no start SOA",
5541 xfr->task_transfer->master->host);
5544 if(xfr->task_transfer->rr_scan_num == 1 &&
5545 tp != LDNS_RR_TYPE_SOA) {
5546 /* second RR is not a SOA record, this is not an IXFR
5547 * the master is replying with an AXFR */
5548 xfr->task_transfer->on_ixfr_is_axfr = 1;
5550 if(tp == LDNS_RR_TYPE_SOA) {
5553 verbose(VERB_ALGO, "xfr to %s failed, packet "
5554 "with SOA with malformed rdata",
5555 xfr->task_transfer->master->host);
5558 if(dname_pkt_compare(pkt, sldns_buffer_at(pkt, pos),
5560 verbose(VERB_ALGO, "xfr to %s failed, packet "
5561 "with SOA with wrong dname",
5562 xfr->task_transfer->master->host);
5566 /* read serial number of SOA */
5567 serial = sldns_buffer_read_u32_at(pkt,
5568 sldns_buffer_position(pkt)+rdlen-20);
5570 /* check for IXFR 'zone has SOA x' reply */
5571 if(xfr->task_transfer->on_ixfr &&
5572 xfr->task_transfer->rr_scan_num == 0 &&
5573 LDNS_ANCOUNT(wire)==1) {
5574 verbose(VERB_ALGO, "xfr to %s ended, "
5575 "IXFR reply that zone has serial %u,"
5576 " fallback from IXFR to AXFR",
5577 xfr->task_transfer->master->host,
5579 xfr->task_transfer->ixfr_fail = 1;
5584 /* if first SOA, store serial number */
5585 if(xfr->task_transfer->got_xfr_serial == 0) {
5586 xfr->task_transfer->got_xfr_serial = 1;
5587 xfr->task_transfer->incoming_xfr_serial =
5589 verbose(VERB_ALGO, "xfr %s: contains "
5591 xfr->task_transfer->master->host,
5593 /* see if end of AXFR */
5594 } else if(!xfr->task_transfer->on_ixfr ||
5595 xfr->task_transfer->on_ixfr_is_axfr) {
5596 /* second SOA with serial is the end
5599 verbose(VERB_ALGO, "xfr %s: last AXFR packet",
5600 xfr->task_transfer->master->host);
5601 /* for IXFR, count SOA records with that serial */
5602 } else if(xfr->task_transfer->incoming_xfr_serial ==
5603 serial && xfr->task_transfer->got_xfr_serial
5605 xfr->task_transfer->got_xfr_serial++;
5606 /* if not first soa, if serial==firstserial, the
5607 * third time we are at the end, for IXFR */
5608 } else if(xfr->task_transfer->incoming_xfr_serial ==
5609 serial && xfr->task_transfer->got_xfr_serial
5611 verbose(VERB_ALGO, "xfr %s: last IXFR packet",
5612 xfr->task_transfer->master->host);
5614 /* continue parse check, if that succeeds,
5615 * transfer is done */
5618 xfr->task_transfer->rr_scan_num++;
5620 /* skip over RR rdata to go to the next RR */
5621 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5624 /* check authority section */
5625 /* we skip over the RRs checking packet format */
5626 for(i=0; i<(int)LDNS_NSCOUNT(wire); i++) {
5628 if(pkt_dname_len(pkt) == 0) {
5629 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5630 "malformed dname in authority section",
5631 xfr->task_transfer->master->host);
5634 if(sldns_buffer_remaining(pkt) < 10) {
5635 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5637 xfr->task_transfer->master->host);
5640 (void)sldns_buffer_read_u16(pkt); /* type */
5641 (void)sldns_buffer_read_u16(pkt); /* class */
5642 (void)sldns_buffer_read_u32(pkt); /* ttl */
5643 rdlen = sldns_buffer_read_u16(pkt);
5644 if(sldns_buffer_remaining(pkt) < rdlen) {
5645 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5646 "truncated RR rdata",
5647 xfr->task_transfer->master->host);
5650 /* skip over RR rdata to go to the next RR */
5651 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5654 /* check additional section */
5655 for(i=0; i<(int)LDNS_ARCOUNT(wire); i++) {
5657 if(pkt_dname_len(pkt) == 0) {
5658 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5659 "malformed dname in additional section",
5660 xfr->task_transfer->master->host);
5663 if(sldns_buffer_remaining(pkt) < 10) {
5664 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5666 xfr->task_transfer->master->host);
5669 (void)sldns_buffer_read_u16(pkt); /* type */
5670 (void)sldns_buffer_read_u16(pkt); /* class */
5671 (void)sldns_buffer_read_u32(pkt); /* ttl */
5672 rdlen = sldns_buffer_read_u16(pkt);
5673 if(sldns_buffer_remaining(pkt) < rdlen) {
5674 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5675 "truncated RR rdata",
5676 xfr->task_transfer->master->host);
5679 /* skip over RR rdata to go to the next RR */
5680 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5686 /** Link the data from this packet into the worklist of transferred data */
5688 xfer_link_data(sldns_buffer* pkt, struct auth_xfer* xfr)
5691 struct auth_chunk* e;
5692 e = (struct auth_chunk*)calloc(1, sizeof(*e));
5695 e->len = sldns_buffer_limit(pkt);
5696 e->data = memdup(sldns_buffer_begin(pkt), e->len);
5702 /* alloc succeeded, link into list */
5703 if(!xfr->task_transfer->chunks_first)
5704 xfr->task_transfer->chunks_first = e;
5705 if(xfr->task_transfer->chunks_last)
5706 xfr->task_transfer->chunks_last->next = e;
5707 xfr->task_transfer->chunks_last = e;
5711 /** task transfer. the list of data is complete. process it and if failed
5712 * move to next master, if succeeded, end the task transfer */
5714 process_list_end_transfer(struct auth_xfer* xfr, struct module_env* env)
5717 if(xfr_process_chunk_list(xfr, env, &ixfr_fail)) {
5719 auth_chunks_delete(xfr->task_transfer);
5721 /* we fetched the zone, move to wait task */
5722 xfr_transfer_disown(xfr);
5724 if(xfr->notify_received && (!xfr->notify_has_serial ||
5725 (xfr->notify_has_serial &&
5726 xfr_serial_means_update(xfr, xfr->notify_serial)))) {
5727 uint32_t sr = xfr->notify_serial;
5728 int has_sr = xfr->notify_has_serial;
5729 /* we received a notify while probe/transfer was
5730 * in progress. start a new probe and transfer */
5731 xfr->notify_received = 0;
5732 xfr->notify_has_serial = 0;
5733 xfr->notify_serial = 0;
5734 if(!xfr_start_probe(xfr, env, NULL)) {
5735 /* if we couldn't start it, already in
5736 * progress; restore notify serial,
5737 * while xfr still locked */
5738 xfr->notify_received = 1;
5739 xfr->notify_has_serial = has_sr;
5740 xfr->notify_serial = sr;
5741 lock_basic_unlock(&xfr->lock);
5745 /* pick up the nextprobe task and wait (normail wait time) */
5746 if(xfr->task_nextprobe->worker == NULL)
5747 xfr_set_timeout(xfr, env, 0, 0);
5749 lock_basic_unlock(&xfr->lock);
5752 /* processing failed */
5753 /* when done, delete data from list */
5754 auth_chunks_delete(xfr->task_transfer);
5756 xfr->task_transfer->ixfr_fail = 1;
5758 xfr_transfer_nextmaster(xfr);
5760 xfr_transfer_nexttarget_or_end(xfr, env);
5763 /** callback for the task_transfer timer */
5765 auth_xfer_transfer_timer_callback(void* arg)
5767 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5768 struct module_env* env;
5769 int gonextonfail = 1;
5770 log_assert(xfr->task_transfer);
5771 lock_basic_lock(&xfr->lock);
5772 env = xfr->task_transfer->env;
5773 if(env->outnet->want_to_quit) {
5774 lock_basic_unlock(&xfr->lock);
5775 return; /* stop on quit */
5778 verbose(VERB_ALGO, "xfr stopped, connection timeout to %s",
5779 xfr->task_transfer->master->host);
5781 /* see if IXFR caused the failure, if so, try AXFR */
5782 if(xfr->task_transfer->on_ixfr) {
5783 xfr->task_transfer->ixfr_possible_timeout_count++;
5784 if(xfr->task_transfer->ixfr_possible_timeout_count >=
5785 NUM_TIMEOUTS_FALLBACK_IXFR) {
5786 verbose(VERB_ALGO, "xfr to %s, fallback "
5787 "from IXFR to AXFR (because of timeouts)",
5788 xfr->task_transfer->master->host);
5789 xfr->task_transfer->ixfr_fail = 1;
5794 /* delete transferred data from list */
5795 auth_chunks_delete(xfr->task_transfer);
5796 comm_point_delete(xfr->task_transfer->cp);
5797 xfr->task_transfer->cp = NULL;
5799 xfr_transfer_nextmaster(xfr);
5800 xfr_transfer_nexttarget_or_end(xfr, env);
5803 /** callback for task_transfer tcp connections */
5805 auth_xfer_transfer_tcp_callback(struct comm_point* c, void* arg, int err,
5806 struct comm_reply* ATTR_UNUSED(repinfo))
5808 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5809 struct module_env* env;
5810 int gonextonfail = 1;
5811 int transferdone = 0;
5812 log_assert(xfr->task_transfer);
5813 lock_basic_lock(&xfr->lock);
5814 env = xfr->task_transfer->env;
5815 if(env->outnet->want_to_quit) {
5816 lock_basic_unlock(&xfr->lock);
5817 return 0; /* stop on quit */
5819 /* stop the timer */
5820 comm_timer_disable(xfr->task_transfer->timer);
5822 if(err != NETEVENT_NOERROR) {
5823 /* connection failed, closed, or timeout */
5824 /* stop this transfer, cleanup
5825 * and continue task_transfer*/
5826 verbose(VERB_ALGO, "xfr stopped, connection lost to %s",
5827 xfr->task_transfer->master->host);
5829 /* see if IXFR caused the failure, if so, try AXFR */
5830 if(xfr->task_transfer->on_ixfr) {
5831 xfr->task_transfer->ixfr_possible_timeout_count++;
5832 if(xfr->task_transfer->ixfr_possible_timeout_count >=
5833 NUM_TIMEOUTS_FALLBACK_IXFR) {
5834 verbose(VERB_ALGO, "xfr to %s, fallback "
5835 "from IXFR to AXFR (because of timeouts)",
5836 xfr->task_transfer->master->host);
5837 xfr->task_transfer->ixfr_fail = 1;
5843 /* delete transferred data from list */
5844 auth_chunks_delete(xfr->task_transfer);
5845 comm_point_delete(xfr->task_transfer->cp);
5846 xfr->task_transfer->cp = NULL;
5848 xfr_transfer_nextmaster(xfr);
5849 xfr_transfer_nexttarget_or_end(xfr, env);
5852 /* note that IXFR worked without timeout */
5853 if(xfr->task_transfer->on_ixfr)
5854 xfr->task_transfer->ixfr_possible_timeout_count = 0;
5856 /* handle returned packet */
5857 /* if it fails, cleanup and end this transfer */
5858 /* if it needs to fallback from IXFR to AXFR, do that */
5859 if(!check_xfer_packet(c->buffer, xfr, &gonextonfail, &transferdone)) {
5862 /* if it is good, link it into the list of data */
5863 /* if the link into list of data fails (malloc fail) cleanup and end */
5864 if(!xfer_link_data(c->buffer, xfr)) {
5865 verbose(VERB_ALGO, "xfr stopped to %s, malloc failed",
5866 xfr->task_transfer->master->host);
5869 /* if the transfer is done now, disconnect and process the list */
5871 comm_point_delete(xfr->task_transfer->cp);
5872 xfr->task_transfer->cp = NULL;
5873 process_list_end_transfer(xfr, env);
5877 /* if we want to read more messages, setup the commpoint to read
5878 * a DNS packet, and the timeout */
5879 lock_basic_unlock(&xfr->lock);
5880 c->tcp_is_reading = 1;
5881 sldns_buffer_clear(c->buffer);
5882 comm_point_start_listening(c, -1, AUTH_TRANSFER_TIMEOUT);
5886 /** callback for task_transfer http connections */
5888 auth_xfer_transfer_http_callback(struct comm_point* c, void* arg, int err,
5889 struct comm_reply* repinfo)
5891 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5892 struct module_env* env;
5893 log_assert(xfr->task_transfer);
5894 lock_basic_lock(&xfr->lock);
5895 env = xfr->task_transfer->env;
5896 if(env->outnet->want_to_quit) {
5897 lock_basic_unlock(&xfr->lock);
5898 return 0; /* stop on quit */
5900 verbose(VERB_ALGO, "auth zone transfer http callback");
5901 /* stop the timer */
5902 comm_timer_disable(xfr->task_transfer->timer);
5904 if(err != NETEVENT_NOERROR && err != NETEVENT_DONE) {
5905 /* connection failed, closed, or timeout */
5906 /* stop this transfer, cleanup
5907 * and continue task_transfer*/
5908 verbose(VERB_ALGO, "http stopped, connection lost to %s",
5909 xfr->task_transfer->master->host);
5911 /* delete transferred data from list */
5912 auth_chunks_delete(xfr->task_transfer);
5913 if(repinfo) repinfo->c = NULL; /* signal cp deleted to
5914 the routine calling this callback */
5915 comm_point_delete(xfr->task_transfer->cp);
5916 xfr->task_transfer->cp = NULL;
5917 xfr_transfer_nextmaster(xfr);
5918 xfr_transfer_nexttarget_or_end(xfr, env);
5922 /* if it is good, link it into the list of data */
5923 /* if the link into list of data fails (malloc fail) cleanup and end */
5924 if(sldns_buffer_limit(c->buffer) > 0) {
5925 verbose(VERB_ALGO, "auth zone http queued up %d bytes",
5926 (int)sldns_buffer_limit(c->buffer));
5927 if(!xfer_link_data(c->buffer, xfr)) {
5928 verbose(VERB_ALGO, "http stopped to %s, malloc failed",
5929 xfr->task_transfer->master->host);
5933 /* if the transfer is done now, disconnect and process the list */
5934 if(err == NETEVENT_DONE) {
5935 if(repinfo) repinfo->c = NULL; /* signal cp deleted to
5936 the routine calling this callback */
5937 comm_point_delete(xfr->task_transfer->cp);
5938 xfr->task_transfer->cp = NULL;
5939 process_list_end_transfer(xfr, env);
5943 /* if we want to read more messages, setup the commpoint to read
5944 * a DNS packet, and the timeout */
5945 lock_basic_unlock(&xfr->lock);
5946 c->tcp_is_reading = 1;
5947 sldns_buffer_clear(c->buffer);
5948 comm_point_start_listening(c, -1, AUTH_TRANSFER_TIMEOUT);
5953 /** start transfer task by this worker , xfr is locked. */
5955 xfr_start_transfer(struct auth_xfer* xfr, struct module_env* env,
5956 struct auth_master* master)
5958 log_assert(xfr->task_transfer != NULL);
5959 log_assert(xfr->task_transfer->worker == NULL);
5960 log_assert(xfr->task_transfer->chunks_first == NULL);
5961 log_assert(xfr->task_transfer->chunks_last == NULL);
5962 xfr->task_transfer->worker = env->worker;
5963 xfr->task_transfer->env = env;
5965 /* init transfer process */
5966 /* find that master in the transfer's list of masters? */
5967 xfr_transfer_start_list(xfr, master);
5968 /* start lookup for hostnames in transfer master list */
5969 xfr_transfer_start_lookups(xfr);
5971 /* initiate TCP, and set timeout on it */
5972 xfr_transfer_nexttarget_or_end(xfr, env);
5975 /** disown task_probe. caller must hold xfr.lock */
5977 xfr_probe_disown(struct auth_xfer* xfr)
5979 /* remove timer (from this worker's event base) */
5980 comm_timer_delete(xfr->task_probe->timer);
5981 xfr->task_probe->timer = NULL;
5982 /* remove the commpoint */
5983 comm_point_delete(xfr->task_probe->cp);
5984 xfr->task_probe->cp = NULL;
5985 /* we don't own this item anymore */
5986 xfr->task_probe->worker = NULL;
5987 xfr->task_probe->env = NULL;
5990 /** send the UDP probe to the master, this is part of task_probe */
5992 xfr_probe_send_probe(struct auth_xfer* xfr, struct module_env* env,
5995 struct sockaddr_storage addr;
5996 socklen_t addrlen = 0;
5999 struct auth_master* master = xfr_probe_current_master(xfr);
6000 char *auth_name = NULL;
6001 if(!master) return 0;
6002 if(master->allow_notify) return 0; /* only for notify */
6003 if(master->http) return 0; /* only masters get SOA UDP probe,
6004 not urls, if those are in this list */
6006 /* get master addr */
6007 if(xfr->task_probe->scan_addr) {
6008 addrlen = xfr->task_probe->scan_addr->addrlen;
6009 memmove(&addr, &xfr->task_probe->scan_addr->addr, addrlen);
6011 if(!authextstrtoaddr(master->host, &addr, &addrlen, &auth_name)) {
6012 /* the ones that are not in addr format are supposed
6013 * to be looked up. The lookup has failed however,
6016 dname_str(xfr->name, zname);
6017 log_err("%s: failed lookup, cannot probe to master %s",
6018 zname, master->host);
6021 if (auth_name != NULL) {
6022 if (addr.ss_family == AF_INET
6023 && (int)ntohs(((struct sockaddr_in *)&addr)->sin_port)
6024 == env->cfg->ssl_port)
6025 ((struct sockaddr_in *)&addr)->sin_port
6026 = htons((uint16_t)env->cfg->port);
6027 else if (addr.ss_family == AF_INET6
6028 && (int)ntohs(((struct sockaddr_in6 *)&addr)->sin6_port)
6029 == env->cfg->ssl_port)
6030 ((struct sockaddr_in6 *)&addr)->sin6_port
6031 = htons((uint16_t)env->cfg->port);
6036 /* create new ID for new probes, but not on timeout retries,
6037 * this means we'll accept replies to previous retries to same ip */
6038 if(timeout == AUTH_PROBE_TIMEOUT)
6039 xfr->task_probe->id = (uint16_t)(ub_random(env->rnd)&0xffff);
6040 xfr_create_soa_probe_packet(xfr, env->scratch_buffer,
6041 xfr->task_probe->id);
6042 /* we need to remove the cp if we have a different ip4/ip6 type now */
6043 if(xfr->task_probe->cp &&
6044 ((xfr->task_probe->cp_is_ip6 && !addr_is_ip6(&addr, addrlen)) ||
6045 (!xfr->task_probe->cp_is_ip6 && addr_is_ip6(&addr, addrlen)))
6047 comm_point_delete(xfr->task_probe->cp);
6048 xfr->task_probe->cp = NULL;
6050 if(!xfr->task_probe->cp) {
6051 if(addr_is_ip6(&addr, addrlen))
6052 xfr->task_probe->cp_is_ip6 = 1;
6053 else xfr->task_probe->cp_is_ip6 = 0;
6054 xfr->task_probe->cp = outnet_comm_point_for_udp(env->outnet,
6055 auth_xfer_probe_udp_callback, xfr, &addr, addrlen);
6056 if(!xfr->task_probe->cp) {
6057 char zname[255+1], as[256];
6058 dname_str(xfr->name, zname);
6059 addr_to_str(&addr, addrlen, as, sizeof(as));
6060 verbose(VERB_ALGO, "cannot create udp cp for "
6061 "probe %s to %s", zname, as);
6065 if(!xfr->task_probe->timer) {
6066 xfr->task_probe->timer = comm_timer_create(env->worker_base,
6067 auth_xfer_probe_timer_callback, xfr);
6068 if(!xfr->task_probe->timer) {
6069 log_err("malloc failure");
6074 /* send udp packet */
6075 if(!comm_point_send_udp_msg(xfr->task_probe->cp, env->scratch_buffer,
6076 (struct sockaddr*)&addr, addrlen)) {
6077 char zname[255+1], as[256];
6078 dname_str(xfr->name, zname);
6079 addr_to_str(&addr, addrlen, as, sizeof(as));
6080 verbose(VERB_ALGO, "failed to send soa probe for %s to %s",
6084 if(verbosity >= VERB_ALGO) {
6085 char zname[255+1], as[256];
6086 dname_str(xfr->name, zname);
6087 addr_to_str(&addr, addrlen, as, sizeof(as));
6088 verbose(VERB_ALGO, "auth zone %s soa probe sent to %s", zname,
6091 xfr->task_probe->timeout = timeout;
6093 t.tv_sec = timeout/1000;
6094 t.tv_usec = (timeout%1000)*1000;
6096 comm_timer_set(xfr->task_probe->timer, &t);
6101 /** callback for task_probe timer */
6103 auth_xfer_probe_timer_callback(void* arg)
6105 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6106 struct module_env* env;
6107 log_assert(xfr->task_probe);
6108 lock_basic_lock(&xfr->lock);
6109 env = xfr->task_probe->env;
6110 if(env->outnet->want_to_quit) {
6111 lock_basic_unlock(&xfr->lock);
6112 return; /* stop on quit */
6115 if(verbosity >= VERB_ALGO) {
6117 dname_str(xfr->name, zname);
6118 verbose(VERB_ALGO, "auth zone %s soa probe timeout", zname);
6120 if(xfr->task_probe->timeout <= AUTH_PROBE_TIMEOUT_STOP) {
6121 /* try again with bigger timeout */
6122 if(xfr_probe_send_probe(xfr, env, xfr->task_probe->timeout*2)) {
6123 lock_basic_unlock(&xfr->lock);
6127 /* delete commpoint so a new one is created, with a fresh port nr */
6128 comm_point_delete(xfr->task_probe->cp);
6129 xfr->task_probe->cp = NULL;
6131 /* too many timeouts (or fail to send), move to next or end */
6132 xfr_probe_nextmaster(xfr);
6133 xfr_probe_send_or_end(xfr, env);
6136 /** callback for task_probe udp packets */
6138 auth_xfer_probe_udp_callback(struct comm_point* c, void* arg, int err,
6139 struct comm_reply* repinfo)
6141 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6142 struct module_env* env;
6143 log_assert(xfr->task_probe);
6144 lock_basic_lock(&xfr->lock);
6145 env = xfr->task_probe->env;
6146 if(env->outnet->want_to_quit) {
6147 lock_basic_unlock(&xfr->lock);
6148 return 0; /* stop on quit */
6151 /* the comm_point_udp_callback is in a for loop for NUM_UDP_PER_SELECT
6152 * and we set rep.c=NULL to stop if from looking inside the commpoint*/
6154 /* stop the timer */
6155 comm_timer_disable(xfr->task_probe->timer);
6157 /* see if we got a packet and what that means */
6158 if(err == NETEVENT_NOERROR) {
6159 uint32_t serial = 0;
6160 if(check_packet_ok(c->buffer, LDNS_RR_TYPE_SOA, xfr,
6162 /* successful lookup */
6163 if(verbosity >= VERB_ALGO) {
6165 dname_str(xfr->name, buf);
6166 verbose(VERB_ALGO, "auth zone %s: soa probe "
6167 "serial is %u", buf, (unsigned)serial);
6169 /* see if this serial indicates that the zone has
6171 if(xfr_serial_means_update(xfr, serial)) {
6172 /* if updated, start the transfer task, if needed */
6173 verbose(VERB_ALGO, "auth_zone updated, start transfer");
6174 if(xfr->task_transfer->worker == NULL) {
6175 struct auth_master* master =
6176 xfr_probe_current_master(xfr);
6177 /* if we have download URLs use them
6178 * in preference to this master we
6179 * just probed the SOA from */
6180 if(xfr->task_transfer->masters &&
6181 xfr->task_transfer->masters->http)
6183 xfr_probe_disown(xfr);
6184 xfr_start_transfer(xfr, env, master);
6188 /* other tasks are running, we don't do this anymore */
6189 xfr_probe_disown(xfr);
6190 lock_basic_unlock(&xfr->lock);
6191 /* return, we don't sent a reply to this udp packet,
6192 * and we setup the tasks to do next */
6195 verbose(VERB_ALGO, "auth_zone master reports unchanged soa serial");
6196 /* we if cannot find updates amongst the
6197 * masters, this means we then have a new lease
6199 xfr->task_probe->have_new_lease = 1;
6202 if(verbosity >= VERB_ALGO) {
6204 dname_str(xfr->name, buf);
6205 verbose(VERB_ALGO, "auth zone %s: bad reply to soa probe", buf);
6209 if(verbosity >= VERB_ALGO) {
6211 dname_str(xfr->name, buf);
6212 verbose(VERB_ALGO, "auth zone %s: soa probe failed", buf);
6216 /* failed lookup or not an update */
6217 /* delete commpoint so a new one is created, with a fresh port nr */
6218 comm_point_delete(xfr->task_probe->cp);
6219 xfr->task_probe->cp = NULL;
6221 /* if the result was not a successfull probe, we need
6222 * to send the next one */
6223 xfr_probe_nextmaster(xfr);
6224 xfr_probe_send_or_end(xfr, env);
6228 /** lookup a host name for its addresses, if needed */
6230 xfr_probe_lookup_host(struct auth_xfer* xfr, struct module_env* env)
6232 struct sockaddr_storage addr;
6233 socklen_t addrlen = 0;
6234 struct auth_master* master = xfr->task_probe->lookup_target;
6235 struct query_info qinfo;
6236 uint16_t qflags = BIT_RD;
6237 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
6238 struct edns_data edns;
6239 sldns_buffer* buf = env->scratch_buffer;
6240 if(!master) return 0;
6241 if(extstrtoaddr(master->host, &addr, &addrlen)) {
6242 /* not needed, host is in IP addr format */
6245 if(master->allow_notify && !master->http &&
6246 strchr(master->host, '/') != NULL &&
6247 strchr(master->host, '/') == strrchr(master->host, '/')) {
6248 return 0; /* is IP/prefix format, not something to look up */
6251 /* use mesh_new_callback to probe for non-addr hosts,
6252 * and then wait for them to be looked up (in cache, or query) */
6253 qinfo.qname_len = sizeof(dname);
6254 if(sldns_str2wire_dname_buf(master->host, dname, &qinfo.qname_len)
6256 log_err("cannot parse host name of master %s", master->host);
6259 qinfo.qname = dname;
6260 qinfo.qclass = xfr->dclass;
6261 qinfo.qtype = LDNS_RR_TYPE_A;
6262 if(xfr->task_probe->lookup_aaaa)
6263 qinfo.qtype = LDNS_RR_TYPE_AAAA;
6264 qinfo.local_alias = NULL;
6265 if(verbosity >= VERB_ALGO) {
6267 char buf2[LDNS_MAX_DOMAINLEN+1];
6268 dname_str(xfr->name, buf2);
6269 snprintf(buf1, sizeof(buf1), "auth zone %s: master lookup"
6270 " for task_probe", buf2);
6271 log_query_info(VERB_ALGO, buf1, &qinfo);
6273 edns.edns_present = 1;
6275 edns.edns_version = 0;
6276 edns.bits = EDNS_DO;
6277 edns.opt_list = NULL;
6278 if(sldns_buffer_capacity(buf) < 65535)
6279 edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
6280 else edns.udp_size = 65535;
6282 /* unlock xfr during mesh_new_callback() because the callback can be
6283 * called straight away */
6284 lock_basic_unlock(&xfr->lock);
6285 if(!mesh_new_callback(env->mesh, &qinfo, qflags, &edns, buf, 0,
6286 &auth_xfer_probe_lookup_callback, xfr)) {
6287 lock_basic_lock(&xfr->lock);
6288 log_err("out of memory lookup up master %s", master->host);
6291 lock_basic_lock(&xfr->lock);
6295 /** move to sending the probe packets, next if fails. task_probe */
6297 xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
6299 /* are we doing hostname lookups? */
6300 while(xfr->task_probe->lookup_target) {
6301 if(xfr_probe_lookup_host(xfr, env)) {
6302 /* wait for lookup to finish,
6303 * note that the hostname may be in unbound's cache
6304 * and we may then get an instant cache response,
6305 * and that calls the callback just like a full
6306 * lookup and lookup failures also call callback */
6307 if(verbosity >= VERB_ALGO) {
6309 dname_str(xfr->name, zname);
6310 verbose(VERB_ALGO, "auth zone %s probe next target lookup", zname);
6312 lock_basic_unlock(&xfr->lock);
6315 xfr_probe_move_to_next_lookup(xfr, env);
6317 /* probe of list has ended. Create or refresh the list of of
6318 * allow_notify addrs */
6319 probe_copy_masters_for_allow_notify(xfr);
6320 if(verbosity >= VERB_ALGO) {
6322 dname_str(xfr->name, zname);
6323 verbose(VERB_ALGO, "auth zone %s probe: notify addrs updated", zname);
6325 if(xfr->task_probe->only_lookup) {
6326 /* only wanted lookups for copy, stop probe and start wait */
6327 xfr->task_probe->only_lookup = 0;
6328 if(verbosity >= VERB_ALGO) {
6330 dname_str(xfr->name, zname);
6331 verbose(VERB_ALGO, "auth zone %s probe: finished only_lookup", zname);
6333 xfr_probe_disown(xfr);
6334 if(xfr->task_nextprobe->worker == NULL)
6335 xfr_set_timeout(xfr, env, 0, 0);
6336 lock_basic_unlock(&xfr->lock);
6340 /* send probe packets */
6341 while(!xfr_probe_end_of_list(xfr)) {
6342 if(xfr_probe_send_probe(xfr, env, AUTH_PROBE_TIMEOUT)) {
6343 /* successfully sent probe, wait for callback */
6344 lock_basic_unlock(&xfr->lock);
6347 /* failed to send probe, next master */
6348 xfr_probe_nextmaster(xfr);
6351 /* done with probe sequence, wait */
6352 if(xfr->task_probe->have_new_lease) {
6353 /* if zone not updated, start the wait timer again */
6354 if(verbosity >= VERB_ALGO) {
6356 dname_str(xfr->name, zname);
6357 verbose(VERB_ALGO, "auth_zone %s unchanged, new lease, wait", zname);
6359 xfr_probe_disown(xfr);
6361 xfr->lease_time = *env->now;
6362 if(xfr->task_nextprobe->worker == NULL)
6363 xfr_set_timeout(xfr, env, 0, 0);
6365 if(verbosity >= VERB_ALGO) {
6367 dname_str(xfr->name, zname);
6368 verbose(VERB_ALGO, "auth zone %s soa probe failed, wait to retry", zname);
6370 /* we failed to send this as well, move to the wait task,
6371 * use the shorter retry timeout */
6372 xfr_probe_disown(xfr);
6373 /* pick up the nextprobe task and wait */
6374 if(xfr->task_nextprobe->worker == NULL)
6375 xfr_set_timeout(xfr, env, 1, 0);
6378 lock_basic_unlock(&xfr->lock);
6381 /** callback for task_probe lookup of host name, of A or AAAA */
6382 void auth_xfer_probe_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
6383 enum sec_status ATTR_UNUSED(sec), char* ATTR_UNUSED(why_bogus),
6384 int ATTR_UNUSED(was_ratelimited))
6386 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6387 struct module_env* env;
6388 log_assert(xfr->task_probe);
6389 lock_basic_lock(&xfr->lock);
6390 env = xfr->task_probe->env;
6391 if(env->outnet->want_to_quit) {
6392 lock_basic_unlock(&xfr->lock);
6393 return; /* stop on quit */
6396 /* process result */
6397 if(rcode == LDNS_RCODE_NOERROR) {
6398 uint16_t wanted_qtype = LDNS_RR_TYPE_A;
6399 struct regional* temp = env->scratch;
6400 struct query_info rq;
6401 struct reply_info* rep;
6402 if(xfr->task_probe->lookup_aaaa)
6403 wanted_qtype = LDNS_RR_TYPE_AAAA;
6404 memset(&rq, 0, sizeof(rq));
6405 rep = parse_reply_in_temp_region(buf, temp, &rq);
6406 if(rep && rq.qtype == wanted_qtype &&
6407 FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_NOERROR) {
6408 /* parsed successfully */
6409 struct ub_packed_rrset_key* answer =
6410 reply_find_answer_rrset(&rq, rep);
6412 xfr_master_add_addrs(xfr->task_probe->
6413 lookup_target, answer, wanted_qtype);
6415 if(verbosity >= VERB_ALGO) {
6417 dname_str(xfr->name, zname);
6418 verbose(VERB_ALGO, "auth zone %s host %s type %s probe lookup has nodata", zname, xfr->task_probe->lookup_target->host, (xfr->task_probe->lookup_aaaa?"AAAA":"A"));
6422 if(verbosity >= VERB_ALGO) {
6424 dname_str(xfr->name, zname);
6425 verbose(VERB_ALGO, "auth zone %s host %s type %s probe lookup has no address", zname, xfr->task_probe->lookup_target->host, (xfr->task_probe->lookup_aaaa?"AAAA":"A"));
6429 if(verbosity >= VERB_ALGO) {
6431 dname_str(xfr->name, zname);
6432 verbose(VERB_ALGO, "auth zone %s host %s type %s probe lookup failed", zname, xfr->task_probe->lookup_target->host, (xfr->task_probe->lookup_aaaa?"AAAA":"A"));
6435 if(xfr->task_probe->lookup_target->list &&
6436 xfr->task_probe->lookup_target == xfr_probe_current_master(xfr))
6437 xfr->task_probe->scan_addr = xfr->task_probe->lookup_target->list;
6439 /* move to lookup AAAA after A lookup, move to next hostname lookup,
6440 * or move to send the probes, or, if nothing to do, end task_probe */
6441 xfr_probe_move_to_next_lookup(xfr, env);
6442 xfr_probe_send_or_end(xfr, env);
6445 /** disown task_nextprobe. caller must hold xfr.lock */
6447 xfr_nextprobe_disown(struct auth_xfer* xfr)
6449 /* delete the timer, because the next worker to pick this up may
6450 * not have the same event base */
6451 comm_timer_delete(xfr->task_nextprobe->timer);
6452 xfr->task_nextprobe->timer = NULL;
6453 xfr->task_nextprobe->next_probe = 0;
6454 /* we don't own this item anymore */
6455 xfr->task_nextprobe->worker = NULL;
6456 xfr->task_nextprobe->env = NULL;
6459 /** xfer nextprobe timeout callback, this is part of task_nextprobe */
6461 auth_xfer_timer(void* arg)
6463 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6464 struct module_env* env;
6465 log_assert(xfr->task_nextprobe);
6466 lock_basic_lock(&xfr->lock);
6467 env = xfr->task_nextprobe->env;
6468 if(env->outnet->want_to_quit) {
6469 lock_basic_unlock(&xfr->lock);
6470 return; /* stop on quit */
6473 /* see if zone has expired, and if so, also set auth_zone expired */
6474 if(xfr->have_zone && !xfr->zone_expired &&
6475 *env->now >= xfr->lease_time + xfr->expiry) {
6476 lock_basic_unlock(&xfr->lock);
6477 auth_xfer_set_expired(xfr, env, 1);
6478 lock_basic_lock(&xfr->lock);
6481 xfr_nextprobe_disown(xfr);
6483 if(!xfr_start_probe(xfr, env, NULL)) {
6484 /* not started because already in progress */
6485 lock_basic_unlock(&xfr->lock);
6489 /** return true if there are probe (SOA UDP query) targets in the master list*/
6491 have_probe_targets(struct auth_master* list)
6493 struct auth_master* p;
6494 for(p=list; p; p = p->next) {
6495 if(!p->allow_notify && p->host)
6501 /** start task_probe if possible, if no masters for probe start task_transfer
6502 * returns true if task has been started, and false if the task is already
6505 xfr_start_probe(struct auth_xfer* xfr, struct module_env* env,
6506 struct auth_master* spec)
6508 /* see if we need to start a probe (or maybe it is already in
6509 * progress (due to notify)) */
6510 if(xfr->task_probe->worker == NULL) {
6511 if(!have_probe_targets(xfr->task_probe->masters) &&
6512 !(xfr->task_probe->only_lookup &&
6513 xfr->task_probe->masters != NULL)) {
6514 /* useless to pick up task_probe, no masters to
6515 * probe. Instead attempt to pick up task transfer */
6516 if(xfr->task_transfer->worker == NULL) {
6517 xfr_start_transfer(xfr, env, spec);
6520 /* task transfer already in progress */
6524 /* pick up the probe task ourselves */
6525 xfr->task_probe->worker = env->worker;
6526 xfr->task_probe->env = env;
6527 xfr->task_probe->cp = NULL;
6529 /* start the task */
6530 /* have not seen a new lease yet, this scan */
6531 xfr->task_probe->have_new_lease = 0;
6532 /* if this was a timeout, no specific first master to scan */
6533 /* otherwise, spec is nonNULL the notified master, scan
6534 * first and also transfer first from it */
6535 xfr_probe_start_list(xfr, spec);
6536 /* setup to start the lookup of hostnames of masters afresh */
6537 xfr_probe_start_lookups(xfr);
6538 /* send the probe packet or next send, or end task */
6539 xfr_probe_send_or_end(xfr, env);
6545 /** for task_nextprobe.
6546 * determine next timeout for auth_xfer. Also (re)sets timer.
6547 * @param xfr: task structure
6548 * @param env: module environment, with worker and time.
6549 * @param failure: set true if timer should be set for failure retry.
6550 * @param lookup_only: only perform lookups when timer done, 0 sec timeout
6553 xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
6554 int failure, int lookup_only)
6557 log_assert(xfr->task_nextprobe != NULL);
6558 log_assert(xfr->task_nextprobe->worker == NULL ||
6559 xfr->task_nextprobe->worker == env->worker);
6560 /* normally, nextprobe = startoflease + refresh,
6561 * but if expiry is sooner, use that one.
6562 * after a failure, use the retry timer instead. */
6563 xfr->task_nextprobe->next_probe = *env->now;
6564 if(xfr->lease_time && !failure)
6565 xfr->task_nextprobe->next_probe = xfr->lease_time;
6568 xfr->task_nextprobe->backoff = 0;
6570 if(xfr->task_nextprobe->backoff == 0)
6571 xfr->task_nextprobe->backoff = 3;
6572 else xfr->task_nextprobe->backoff *= 2;
6573 if(xfr->task_nextprobe->backoff > AUTH_TRANSFER_MAX_BACKOFF)
6574 xfr->task_nextprobe->backoff =
6575 AUTH_TRANSFER_MAX_BACKOFF;
6578 if(xfr->have_zone) {
6579 time_t wait = xfr->refresh;
6580 if(failure) wait = xfr->retry;
6581 if(xfr->expiry < wait)
6582 xfr->task_nextprobe->next_probe += xfr->expiry;
6583 else xfr->task_nextprobe->next_probe += wait;
6585 xfr->task_nextprobe->next_probe +=
6586 xfr->task_nextprobe->backoff;
6587 /* put the timer exactly on expiry, if possible */
6588 if(xfr->lease_time && xfr->lease_time+xfr->expiry <
6589 xfr->task_nextprobe->next_probe &&
6590 xfr->lease_time+xfr->expiry > *env->now)
6591 xfr->task_nextprobe->next_probe =
6592 xfr->lease_time+xfr->expiry;
6594 xfr->task_nextprobe->next_probe +=
6595 xfr->task_nextprobe->backoff;
6598 if(!xfr->task_nextprobe->timer) {
6599 xfr->task_nextprobe->timer = comm_timer_create(
6600 env->worker_base, auth_xfer_timer, xfr);
6601 if(!xfr->task_nextprobe->timer) {
6602 /* failed to malloc memory. likely zone transfer
6603 * also fails for that. skip the timeout */
6605 dname_str(xfr->name, zname);
6606 log_err("cannot allocate timer, no refresh for %s",
6611 xfr->task_nextprobe->worker = env->worker;
6612 xfr->task_nextprobe->env = env;
6613 if(*(xfr->task_nextprobe->env->now) <= xfr->task_nextprobe->next_probe)
6614 tv.tv_sec = xfr->task_nextprobe->next_probe -
6615 *(xfr->task_nextprobe->env->now);
6617 if(tv.tv_sec != 0 && lookup_only && xfr->task_probe->masters) {
6618 /* don't lookup_only, if lookup timeout is 0 anyway,
6619 * or if we don't have masters to lookup */
6621 if(xfr->task_probe->worker == NULL)
6622 xfr->task_probe->only_lookup = 1;
6624 if(verbosity >= VERB_ALGO) {
6626 dname_str(xfr->name, zname);
6627 verbose(VERB_ALGO, "auth zone %s timeout in %d seconds",
6628 zname, (int)tv.tv_sec);
6631 comm_timer_set(xfr->task_nextprobe->timer, &tv);
6634 /** initial pick up of worker timeouts, ties events to worker event loop */
6636 auth_xfer_pickup_initial(struct auth_zones* az, struct module_env* env)
6638 struct auth_xfer* x;
6639 lock_rw_wrlock(&az->lock);
6640 RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
6641 lock_basic_lock(&x->lock);
6642 /* set lease_time, because we now have timestamp in env,
6643 * (not earlier during startup and apply_cfg), and this
6644 * notes the start time when the data was acquired */
6646 x->lease_time = *env->now;
6647 if(x->task_nextprobe && x->task_nextprobe->worker == NULL) {
6648 xfr_set_timeout(x, env, 0, 1);
6650 lock_basic_unlock(&x->lock);
6652 lock_rw_unlock(&az->lock);
6655 void auth_zones_cleanup(struct auth_zones* az)
6657 struct auth_xfer* x;
6658 lock_rw_wrlock(&az->lock);
6659 RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
6660 lock_basic_lock(&x->lock);
6661 if(x->task_nextprobe && x->task_nextprobe->worker != NULL) {
6662 xfr_nextprobe_disown(x);
6664 if(x->task_probe && x->task_probe->worker != NULL) {
6665 xfr_probe_disown(x);
6667 if(x->task_transfer && x->task_transfer->worker != NULL) {
6668 auth_chunks_delete(x->task_transfer);
6669 xfr_transfer_disown(x);
6671 lock_basic_unlock(&x->lock);
6673 lock_rw_unlock(&az->lock);
6677 * malloc the xfer and tasks
6678 * @param z: auth_zone with name of zone.
6680 static struct auth_xfer*
6681 auth_xfer_new(struct auth_zone* z)
6683 struct auth_xfer* xfr;
6684 xfr = (struct auth_xfer*)calloc(1, sizeof(*xfr));
6685 if(!xfr) return NULL;
6686 xfr->name = memdup(z->name, z->namelen);
6691 xfr->node.key = xfr;
6692 xfr->namelen = z->namelen;
6693 xfr->namelabs = z->namelabs;
6694 xfr->dclass = z->dclass;
6696 xfr->task_nextprobe = (struct auth_nextprobe*)calloc(1,
6697 sizeof(struct auth_nextprobe));
6698 if(!xfr->task_nextprobe) {
6703 xfr->task_probe = (struct auth_probe*)calloc(1,
6704 sizeof(struct auth_probe));
6705 if(!xfr->task_probe) {
6706 free(xfr->task_nextprobe);
6711 xfr->task_transfer = (struct auth_transfer*)calloc(1,
6712 sizeof(struct auth_transfer));
6713 if(!xfr->task_transfer) {
6714 free(xfr->task_probe);
6715 free(xfr->task_nextprobe);
6721 lock_basic_init(&xfr->lock);
6722 lock_protect(&xfr->lock, &xfr->name, sizeof(xfr->name));
6723 lock_protect(&xfr->lock, &xfr->namelen, sizeof(xfr->namelen));
6724 lock_protect(&xfr->lock, xfr->name, xfr->namelen);
6725 lock_protect(&xfr->lock, &xfr->namelabs, sizeof(xfr->namelabs));
6726 lock_protect(&xfr->lock, &xfr->dclass, sizeof(xfr->dclass));
6727 lock_protect(&xfr->lock, &xfr->notify_received, sizeof(xfr->notify_received));
6728 lock_protect(&xfr->lock, &xfr->notify_serial, sizeof(xfr->notify_serial));
6729 lock_protect(&xfr->lock, &xfr->zone_expired, sizeof(xfr->zone_expired));
6730 lock_protect(&xfr->lock, &xfr->have_zone, sizeof(xfr->have_zone));
6731 lock_protect(&xfr->lock, &xfr->serial, sizeof(xfr->serial));
6732 lock_protect(&xfr->lock, &xfr->retry, sizeof(xfr->retry));
6733 lock_protect(&xfr->lock, &xfr->refresh, sizeof(xfr->refresh));
6734 lock_protect(&xfr->lock, &xfr->expiry, sizeof(xfr->expiry));
6735 lock_protect(&xfr->lock, &xfr->lease_time, sizeof(xfr->lease_time));
6736 lock_protect(&xfr->lock, &xfr->task_nextprobe->worker,
6737 sizeof(xfr->task_nextprobe->worker));
6738 lock_protect(&xfr->lock, &xfr->task_probe->worker,
6739 sizeof(xfr->task_probe->worker));
6740 lock_protect(&xfr->lock, &xfr->task_transfer->worker,
6741 sizeof(xfr->task_transfer->worker));
6742 lock_basic_lock(&xfr->lock);
6746 /** Create auth_xfer structure.
6747 * This populates the have_zone, soa values, and so on times.
6748 * and sets the timeout, if a zone transfer is needed a short timeout is set.
6749 * For that the auth_zone itself must exist (and read in zonefile)
6750 * returns false on alloc failure. */
6752 auth_xfer_create(struct auth_zones* az, struct auth_zone* z)
6754 struct auth_xfer* xfr;
6757 xfr = auth_xfer_new(z);
6759 log_err("malloc failure");
6762 /* insert in tree */
6763 (void)rbtree_insert(&az->xtree, &xfr->node);
6767 /** create new auth_master structure */
6768 static struct auth_master*
6769 auth_master_new(struct auth_master*** list)
6771 struct auth_master *m;
6772 m = (struct auth_master*)calloc(1, sizeof(*m));
6774 log_err("malloc failure");
6777 /* set first pointer to m, or next pointer of previous element to m */
6779 /* store m's next pointer as future point to store at */
6780 (*list) = &(m->next);
6784 /** dup_prefix : create string from initial part of other string, malloced */
6786 dup_prefix(char* str, size_t num)
6789 size_t len = strlen(str);
6790 if(len < num) num = len; /* not more than strlen */
6791 result = (char*)malloc(num+1);
6793 log_err("malloc failure");
6796 memmove(result, str, num);
6801 /** dup string and print error on error */
6805 char* result = strdup(str);
6807 log_err("malloc failure");
6813 /** find first of two characters */
6815 str_find_first_of_chars(char* s, char a, char b)
6817 char* ra = strchr(s, a);
6818 char* rb = strchr(s, b);
6821 if(ra < rb) return ra;
6825 /** parse URL into host and file parts, false on malloc or parse error */
6827 parse_url(char* url, char** host, char** file, int* port, int* ssl)
6830 /* parse http://www.example.com/file.htm
6831 * or http://127.0.0.1 (index.html)
6832 * or https://[::1@1234]/a/b/c/d */
6834 *port = AUTH_HTTPS_PORT;
6836 /* parse http:// or https:// */
6837 if(strncmp(p, "http://", 7) == 0) {
6840 *port = AUTH_HTTP_PORT;
6841 } else if(strncmp(p, "https://", 8) == 0) {
6843 } else if(strstr(p, "://") && strchr(p, '/') > strstr(p, "://") &&
6844 strchr(p, ':') >= strstr(p, "://")) {
6845 char* uri = dup_prefix(p, (size_t)(strstr(p, "://")-p));
6846 log_err("protocol %s:// not supported (for url %s)",
6852 /* parse hostname part */
6854 char* end = strchr(p, ']');
6855 p++; /* skip over [ */
6857 *host = dup_prefix(p, (size_t)(end-p));
6858 if(!*host) return 0;
6859 p = end+1; /* skip over ] */
6862 if(!*host) return 0;
6866 char* end = str_find_first_of_chars(p, ':', '/');
6868 *host = dup_prefix(p, (size_t)(end-p));
6869 if(!*host) return 0;
6872 if(!*host) return 0;
6874 p = end; /* at next : or / or NULL */
6877 /* parse port number */
6878 if(p && p[0] == ':') {
6880 *port = strtol(p+1, &end, 10);
6884 /* parse filename part */
6885 while(p && *p == '/')
6888 *file = strdup("index.html");
6889 else *file = strdup(p);
6891 log_err("malloc failure");
6898 xfer_set_masters(struct auth_master** list, struct config_auth* c,
6901 struct auth_master* m;
6902 struct config_strlist* p;
6903 /* list points to the first, or next pointer for the new element */
6905 list = &( (*list)->next );
6908 for(p = c->urls; p; p = p->next) {
6909 m = auth_master_new(&list);
6911 if(!parse_url(p->str, &m->host, &m->file, &m->port, &m->ssl))
6914 for(p = c->masters; p; p = p->next) {
6915 m = auth_master_new(&list);
6916 m->ixfr = 1; /* this flag is not configurable */
6917 m->host = strdup(p->str);
6919 log_err("malloc failure");
6923 for(p = c->allow_notify; p; p = p->next) {
6924 m = auth_master_new(&list);
6925 m->allow_notify = 1;
6926 m->host = strdup(p->str);
6928 log_err("malloc failure");
6935 #define SERIAL_BITS 32
6937 compare_serial(uint32_t a, uint32_t b)
6939 const uint32_t cutoff = ((uint32_t) 1 << (SERIAL_BITS - 1));
6943 } else if ((a < b && b - a < cutoff) || (a > b && a - b > cutoff)) {