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 */
305 int auth_zone_cmp(const void* z1, const void* z2)
307 /* first sort on class, so that hierarchy can be maintained within
309 struct auth_zone* a = (struct auth_zone*)z1;
310 struct auth_zone* b = (struct auth_zone*)z2;
312 if(a->dclass != b->dclass) {
313 if(a->dclass < b->dclass)
317 /* sorted such that higher zones sort before lower zones (their
319 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
322 int auth_data_cmp(const void* z1, const void* z2)
324 struct auth_data* a = (struct auth_data*)z1;
325 struct auth_data* b = (struct auth_data*)z2;
327 /* canonical sort, because DNSSEC needs that */
328 return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
332 int auth_xfer_cmp(const void* z1, const void* z2)
334 /* first sort on class, so that hierarchy can be maintained within
336 struct auth_xfer* a = (struct auth_xfer*)z1;
337 struct auth_xfer* b = (struct auth_xfer*)z2;
339 if(a->dclass != b->dclass) {
340 if(a->dclass < b->dclass)
344 /* sorted such that higher zones sort before lower zones (their
346 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
349 /** delete auth rrset node */
351 auth_rrset_delete(struct auth_rrset* rrset)
358 /** delete auth data domain node */
360 auth_data_delete(struct auth_data* n)
362 struct auth_rrset* p, *np;
367 auth_rrset_delete(p);
374 /** helper traverse to delete zones */
376 auth_data_del(rbnode_type* n, void* ATTR_UNUSED(arg))
378 struct auth_data* z = (struct auth_data*)n->key;
382 /** delete an auth zone structure (tree remove must be done elsewhere) */
384 auth_zone_delete(struct auth_zone* z)
387 lock_rw_destroy(&z->lock);
388 traverse_postorder(&z->data, auth_data_del, NULL);
395 auth_zone_create(struct auth_zones* az, uint8_t* nm, size_t nmlen,
398 struct auth_zone* z = (struct auth_zone*)calloc(1, sizeof(*z));
405 z->namelabs = dname_count_labels(nm);
406 z->name = memdup(nm, nmlen);
411 rbtree_init(&z->data, &auth_data_cmp);
412 lock_rw_init(&z->lock);
413 lock_protect(&z->lock, &z->name, sizeof(*z)-sizeof(rbnode_type));
414 lock_rw_wrlock(&z->lock);
415 /* z lock protects all, except rbtree itself, which is az->lock */
416 if(!rbtree_insert(&az->ztree, &z->node)) {
417 lock_rw_unlock(&z->lock);
419 log_warn("duplicate auth zone");
426 auth_zone_find(struct auth_zones* az, uint8_t* nm, size_t nmlen,
429 struct auth_zone key;
434 key.namelabs = dname_count_labels(nm);
435 return (struct auth_zone*)rbtree_search(&az->ztree, &key);
439 auth_xfer_find(struct auth_zones* az, uint8_t* nm, size_t nmlen,
442 struct auth_xfer key;
447 key.namelabs = dname_count_labels(nm);
448 return (struct auth_xfer*)rbtree_search(&az->xtree, &key);
451 /** find an auth zone or sorted less-or-equal, return true if exact */
453 auth_zone_find_less_equal(struct auth_zones* az, uint8_t* nm, size_t nmlen,
454 uint16_t dclass, struct auth_zone** z)
456 struct auth_zone key;
461 key.namelabs = dname_count_labels(nm);
462 return rbtree_find_less_equal(&az->ztree, &key, (rbnode_type**)z);
466 /** find the auth zone that is above the given name */
468 auth_zones_find_zone(struct auth_zones* az, uint8_t* name, size_t name_len,
472 size_t nmlen = name_len;
474 if(auth_zone_find_less_equal(az, nm, nmlen, dclass, &z)) {
478 /* less-or-nothing */
479 if(!z) return NULL; /* nothing smaller, nothing above it */
480 /* we found smaller name; smaller may be above the name,
481 * but not below it. */
482 nm = dname_get_shared_topdomain(z->name, name);
483 dname_count_size_labels(nm, &nmlen);
489 z = auth_zone_find(az, nm, nmlen, dclass);
491 if(dname_is_root(nm)) break;
492 dname_remove_label(&nm, &nmlen);
497 /** find or create zone with name str. caller must have lock on az.
498 * returns a wrlocked zone */
499 static struct auth_zone*
500 auth_zones_find_or_add_zone(struct auth_zones* az, char* name)
502 uint8_t nm[LDNS_MAX_DOMAINLEN+1];
503 size_t nmlen = sizeof(nm);
506 if(sldns_str2wire_dname_buf(name, nm, &nmlen) != 0) {
507 log_err("cannot parse auth zone name: %s", name);
510 z = auth_zone_find(az, nm, nmlen, LDNS_RR_CLASS_IN);
512 /* not found, create the zone */
513 z = auth_zone_create(az, nm, nmlen, LDNS_RR_CLASS_IN);
515 lock_rw_wrlock(&z->lock);
520 /** find or create xfer zone with name str. caller must have lock on az.
521 * returns a locked xfer */
522 static struct auth_xfer*
523 auth_zones_find_or_add_xfer(struct auth_zones* az, struct auth_zone* z)
526 x = auth_xfer_find(az, z->name, z->namelen, z->dclass);
528 /* not found, create the zone */
529 x = auth_xfer_create(az, z);
531 lock_basic_lock(&x->lock);
537 auth_zone_set_zonefile(struct auth_zone* z, char* zonefile)
539 if(z->zonefile) free(z->zonefile);
540 if(zonefile == NULL) {
543 z->zonefile = strdup(zonefile);
545 log_err("malloc failure");
552 /** set auth zone fallback. caller must have lock on zone */
554 auth_zone_set_fallback(struct auth_zone* z, char* fallbackstr)
556 if(strcmp(fallbackstr, "yes") != 0 && strcmp(fallbackstr, "no") != 0){
557 log_err("auth zone fallback, expected yes or no, got %s",
561 z->fallback_enabled = (strcmp(fallbackstr, "yes")==0);
565 /** create domain with the given name */
566 static struct auth_data*
567 az_domain_create(struct auth_zone* z, uint8_t* nm, size_t nmlen)
569 struct auth_data* n = (struct auth_data*)malloc(sizeof(*n));
571 memset(n, 0, sizeof(*n));
573 n->name = memdup(nm, nmlen);
579 n->namelabs = dname_count_labels(nm);
580 if(!rbtree_insert(&z->data, &n->node)) {
581 log_warn("duplicate auth domain name");
589 /** find domain with exactly the given name */
590 static struct auth_data*
591 az_find_name(struct auth_zone* z, uint8_t* nm, size_t nmlen)
593 struct auth_zone key;
597 key.namelabs = dname_count_labels(nm);
598 return (struct auth_data*)rbtree_search(&z->data, &key);
601 /** Find domain name (or closest match) */
603 az_find_domain(struct auth_zone* z, struct query_info* qinfo, int* node_exact,
604 struct auth_data** node)
606 struct auth_zone key;
608 key.name = qinfo->qname;
609 key.namelen = qinfo->qname_len;
610 key.namelabs = dname_count_labels(key.name);
611 *node_exact = rbtree_find_less_equal(&z->data, &key,
612 (rbnode_type**)node);
615 /** find or create domain with name in zone */
616 static struct auth_data*
617 az_domain_find_or_create(struct auth_zone* z, uint8_t* dname,
620 struct auth_data* n = az_find_name(z, dname, dname_len);
622 n = az_domain_create(z, dname, dname_len);
627 /** find rrset of given type in the domain */
628 static struct auth_rrset*
629 az_domain_rrset(struct auth_data* n, uint16_t t)
631 struct auth_rrset* rrset;
642 /** remove rrset of this type from domain */
644 domain_remove_rrset(struct auth_data* node, uint16_t rr_type)
646 struct auth_rrset* rrset, *prev;
649 rrset = node->rrsets;
651 if(rrset->type == rr_type) {
652 /* found it, now delete it */
653 if(prev) prev->next = rrset->next;
654 else node->rrsets = rrset->next;
655 auth_rrset_delete(rrset);
663 /** find an rr index in the rrset. returns true if found */
665 az_rrset_find_rr(struct packed_rrset_data* d, uint8_t* rdata, size_t len,
669 for(i=0; i<d->count; i++) {
670 if(d->rr_len[i] != len)
672 if(memcmp(d->rr_data[i], rdata, len) == 0) {
680 /** find an rrsig index in the rrset. returns true if found */
682 az_rrset_find_rrsig(struct packed_rrset_data* d, uint8_t* rdata, size_t len,
686 for(i=d->count; i<d->count + d->rrsig_count; i++) {
687 if(d->rr_len[i] != len)
689 if(memcmp(d->rr_data[i], rdata, len) == 0) {
697 /** see if rdata is duplicate */
699 rdata_duplicate(struct packed_rrset_data* d, uint8_t* rdata, size_t len)
702 for(i=0; i<d->count + d->rrsig_count; i++) {
703 if(d->rr_len[i] != len)
705 if(memcmp(d->rr_data[i], rdata, len) == 0)
711 /** get rrsig type covered from rdata.
712 * @param rdata: rdata in wireformat, starting with 16bit rdlength.
713 * @param rdatalen: length of rdata buffer.
714 * @return type covered (or 0).
717 rrsig_rdata_get_type_covered(uint8_t* rdata, size_t rdatalen)
721 return sldns_read_uint16(rdata+2);
724 /** remove RR from existing RRset. Also sig, if it is a signature.
725 * reallocates the packed rrset for a new one, false on alloc failure */
727 rrset_remove_rr(struct auth_rrset* rrset, size_t index)
729 struct packed_rrset_data* d, *old = rrset->data;
731 if(index >= old->count + old->rrsig_count)
732 return 0; /* index out of bounds */
733 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old) - (
734 sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t) +
735 old->rr_len[index]));
737 log_err("malloc failure");
741 d->count = old->count;
742 d->rrsig_count = old->rrsig_count;
743 if(index < d->count) d->count--;
744 else d->rrsig_count--;
745 d->trust = old->trust;
746 d->security = old->security;
748 /* set rr_len, needed for ptr_fixup */
749 d->rr_len = (size_t*)((uint8_t*)d +
750 sizeof(struct packed_rrset_data));
752 memmove(d->rr_len, old->rr_len, (index)*sizeof(size_t));
753 if(index+1 < old->count+old->rrsig_count)
754 memmove(&d->rr_len[index], &old->rr_len[index+1],
755 (old->count+old->rrsig_count - (index+1))*sizeof(size_t));
756 packed_rrset_ptr_fixup(d);
760 memmove(d->rr_ttl, old->rr_ttl, (index)*sizeof(time_t));
761 if(index+1 < old->count+old->rrsig_count)
762 memmove(&d->rr_ttl[index], &old->rr_ttl[index+1],
763 (old->count+old->rrsig_count - (index+1))*sizeof(time_t));
765 /* move over rr_data */
766 for(i=0; i<d->count+d->rrsig_count; i++) {
768 if(i < index) oldi = i;
770 memmove(d->rr_data[i], old->rr_data[oldi], d->rr_len[i]);
773 /* recalc ttl (lowest of remaining RR ttls) */
774 if(d->count + d->rrsig_count > 0)
775 d->ttl = d->rr_ttl[0];
776 for(i=0; i<d->count+d->rrsig_count; i++) {
777 if(d->rr_ttl[i] < d->ttl)
778 d->ttl = d->rr_ttl[i];
786 /** add RR to existing RRset. If insert_sig is true, add to rrsigs.
787 * This reallocates the packed rrset for a new one */
789 rrset_add_rr(struct auth_rrset* rrset, uint32_t rr_ttl, uint8_t* rdata,
790 size_t rdatalen, int insert_sig)
792 struct packed_rrset_data* d, *old = rrset->data;
793 size_t total, old_total;
795 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old)
796 + sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t)
799 log_err("out of memory");
802 /* copy base values */
803 memcpy(d, old, sizeof(struct packed_rrset_data));
809 old_total = old->count + old->rrsig_count;
810 total = d->count + d->rrsig_count;
811 /* set rr_len, needed for ptr_fixup */
812 d->rr_len = (size_t*)((uint8_t*)d +
813 sizeof(struct packed_rrset_data));
815 memmove(d->rr_len, old->rr_len, old->count*sizeof(size_t));
816 if(old->rrsig_count != 0)
817 memmove(d->rr_len+d->count, old->rr_len+old->count,
818 old->rrsig_count*sizeof(size_t));
820 d->rr_len[d->count-1] = rdatalen;
821 else d->rr_len[total-1] = rdatalen;
822 packed_rrset_ptr_fixup(d);
823 if((time_t)rr_ttl < d->ttl)
826 /* copy old values into new array */
827 if(old->count != 0) {
828 memmove(d->rr_ttl, old->rr_ttl, old->count*sizeof(time_t));
829 /* all the old rr pieces are allocated sequential, so we
830 * can copy them in one go */
831 memmove(d->rr_data[0], old->rr_data[0],
832 (old->rr_data[old->count-1] - old->rr_data[0]) +
833 old->rr_len[old->count-1]);
835 if(old->rrsig_count != 0) {
836 memmove(d->rr_ttl+d->count, old->rr_ttl+old->count,
837 old->rrsig_count*sizeof(time_t));
838 memmove(d->rr_data[d->count], old->rr_data[old->count],
839 (old->rr_data[old_total-1] - old->rr_data[old->count]) +
840 old->rr_len[old_total-1]);
843 /* insert new value */
845 d->rr_ttl[d->count-1] = rr_ttl;
846 memmove(d->rr_data[d->count-1], rdata, rdatalen);
848 d->rr_ttl[total-1] = rr_ttl;
849 memmove(d->rr_data[total-1], rdata, rdatalen);
857 /** Create new rrset for node with packed rrset with one RR element */
858 static struct auth_rrset*
859 rrset_create(struct auth_data* node, uint16_t rr_type, uint32_t rr_ttl,
860 uint8_t* rdata, size_t rdatalen)
862 struct auth_rrset* rrset = (struct auth_rrset*)calloc(1,
864 struct auth_rrset* p, *prev;
865 struct packed_rrset_data* d;
867 log_err("out of memory");
870 rrset->type = rr_type;
872 /* the rrset data structure, with one RR */
873 d = (struct packed_rrset_data*)calloc(1,
874 sizeof(struct packed_rrset_data) + sizeof(size_t) +
875 sizeof(uint8_t*) + sizeof(time_t) + rdatalen);
878 log_err("out of memory");
883 d->trust = rrset_trust_prim_noglue;
884 d->rr_len = (size_t*)((uint8_t*)d + sizeof(struct packed_rrset_data));
885 d->rr_data = (uint8_t**)&(d->rr_len[1]);
886 d->rr_ttl = (time_t*)&(d->rr_data[1]);
887 d->rr_data[0] = (uint8_t*)&(d->rr_ttl[1]);
890 d->rr_len[0] = rdatalen;
891 d->rr_ttl[0] = rr_ttl;
892 memmove(d->rr_data[0], rdata, rdatalen);
895 /* insert rrset into linked list for domain */
896 /* find sorted place to link the rrset into the list */
899 while(p && p->type<=rr_type) {
903 /* so, prev is smaller, and p is larger than rr_type */
905 if(prev) prev->next = rrset;
906 else node->rrsets = rrset;
910 /** count number (and size) of rrsigs that cover a type */
912 rrsig_num_that_cover(struct auth_rrset* rrsig, uint16_t rr_type, size_t* sigsz)
914 struct packed_rrset_data* d = rrsig->data;
917 log_assert(d && rrsig->type == LDNS_RR_TYPE_RRSIG);
918 for(i=0; i<d->count+d->rrsig_count; i++) {
919 if(rrsig_rdata_get_type_covered(d->rr_data[i],
920 d->rr_len[i]) == rr_type) {
922 (*sigsz) += d->rr_len[i];
928 /** See if rrsig set has covered sigs for rrset and move them over */
930 rrset_moveover_rrsigs(struct auth_data* node, uint16_t rr_type,
931 struct auth_rrset* rrset, struct auth_rrset* rrsig)
933 size_t sigs, sigsz, i, j, total;
934 struct packed_rrset_data* sigold = rrsig->data;
935 struct packed_rrset_data* old = rrset->data;
936 struct packed_rrset_data* d, *sigd;
938 log_assert(rrset->type == rr_type);
939 log_assert(rrsig->type == LDNS_RR_TYPE_RRSIG);
940 sigs = rrsig_num_that_cover(rrsig, rr_type, &sigsz);
942 /* 0 rrsigs to move over, done */
946 /* allocate rrset sigsz larger for extra sigs elements, and
947 * allocate rrsig sigsz smaller for less sigs elements. */
948 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old)
949 + sigs*(sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t))
952 log_err("out of memory");
955 /* copy base values */
956 total = old->count + old->rrsig_count;
957 memcpy(d, old, sizeof(struct packed_rrset_data));
958 d->rrsig_count += sigs;
960 d->rr_len = (size_t*)((uint8_t*)d +
961 sizeof(struct packed_rrset_data));
963 memmove(d->rr_len, old->rr_len, total*sizeof(size_t));
964 j = d->count+d->rrsig_count-sigs;
965 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
966 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
967 sigold->rr_len[i]) == rr_type) {
968 d->rr_len[j] = sigold->rr_len[i];
972 packed_rrset_ptr_fixup(d);
974 /* copy old values into new array */
976 memmove(d->rr_ttl, old->rr_ttl, total*sizeof(time_t));
977 /* all the old rr pieces are allocated sequential, so we
978 * can copy them in one go */
979 memmove(d->rr_data[0], old->rr_data[0],
980 (old->rr_data[total-1] - old->rr_data[0]) +
981 old->rr_len[total-1]);
984 /* move over the rrsigs to the larger rrset*/
985 j = d->count+d->rrsig_count-sigs;
986 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
987 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
988 sigold->rr_len[i]) == rr_type) {
989 /* move this one over to location j */
990 d->rr_ttl[j] = sigold->rr_ttl[i];
991 memmove(d->rr_data[j], sigold->rr_data[i],
993 if(d->rr_ttl[j] < d->ttl)
994 d->ttl = d->rr_ttl[j];
999 /* put it in and deallocate the old rrset */
1003 /* now make rrsig set smaller */
1004 if(sigold->count+sigold->rrsig_count == sigs) {
1005 /* remove all sigs from rrsig, remove it entirely */
1006 domain_remove_rrset(node, LDNS_RR_TYPE_RRSIG);
1009 log_assert(packed_rrset_sizeof(sigold) > sigs*(sizeof(size_t) +
1010 sizeof(uint8_t*) + sizeof(time_t)) + sigsz);
1011 sigd = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(sigold)
1012 - sigs*(sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t))
1015 /* no need to free up d, it has already been placed in the
1016 * node->rrset structure */
1017 log_err("out of memory");
1020 /* copy base values */
1021 memcpy(sigd, sigold, sizeof(struct packed_rrset_data));
1022 /* in sigd the RRSIGs are stored in the base of the RR, in count */
1023 sigd->count -= sigs;
1025 sigd->rr_len = (size_t*)((uint8_t*)sigd +
1026 sizeof(struct packed_rrset_data));
1028 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
1029 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
1030 sigold->rr_len[i]) != rr_type) {
1031 sigd->rr_len[j] = sigold->rr_len[i];
1035 packed_rrset_ptr_fixup(sigd);
1037 /* copy old values into new rrsig array */
1039 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
1040 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
1041 sigold->rr_len[i]) != rr_type) {
1042 /* move this one over to location j */
1043 sigd->rr_ttl[j] = sigold->rr_ttl[i];
1044 memmove(sigd->rr_data[j], sigold->rr_data[i],
1046 if(j==0) sigd->ttl = sigd->rr_ttl[j];
1048 if(sigd->rr_ttl[j] < sigd->ttl)
1049 sigd->ttl = sigd->rr_ttl[j];
1055 /* put it in and deallocate the old rrset */
1062 /** copy the rrsigs from the rrset to the rrsig rrset, because the rrset
1063 * is going to be deleted. reallocates the RRSIG rrset data. */
1065 rrsigs_copy_from_rrset_to_rrsigset(struct auth_rrset* rrset,
1066 struct auth_rrset* rrsigset)
1069 if(rrset->data->rrsig_count == 0)
1072 /* move them over one by one, because there might be duplicates,
1073 * duplicates are ignored */
1074 for(i=rrset->data->count;
1075 i<rrset->data->count+rrset->data->rrsig_count; i++) {
1076 uint8_t* rdata = rrset->data->rr_data[i];
1077 size_t rdatalen = rrset->data->rr_len[i];
1078 time_t rr_ttl = rrset->data->rr_ttl[i];
1080 if(rdata_duplicate(rrsigset->data, rdata, rdatalen)) {
1083 if(!rrset_add_rr(rrsigset, rr_ttl, rdata, rdatalen, 0))
1089 /** Add rr to node, ignores duplicate RRs,
1090 * rdata points to buffer with rdatalen octets, starts with 2bytelength. */
1092 az_domain_add_rr(struct auth_data* node, uint16_t rr_type, uint32_t rr_ttl,
1093 uint8_t* rdata, size_t rdatalen, int* duplicate)
1095 struct auth_rrset* rrset;
1096 /* packed rrsets have their rrsigs along with them, sort them out */
1097 if(rr_type == LDNS_RR_TYPE_RRSIG) {
1098 uint16_t ctype = rrsig_rdata_get_type_covered(rdata, rdatalen);
1099 if((rrset=az_domain_rrset(node, ctype))!= NULL) {
1100 /* a node of the correct type exists, add the RRSIG
1101 * to the rrset of the covered data type */
1102 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1103 if(duplicate) *duplicate = 1;
1106 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 1))
1108 } else if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1109 /* add RRSIG to rrset of type RRSIG */
1110 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1111 if(duplicate) *duplicate = 1;
1114 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 0))
1117 /* create rrset of type RRSIG */
1118 if(!rrset_create(node, rr_type, rr_ttl, rdata,
1123 /* normal RR type */
1124 if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1125 /* add data to existing node with data type */
1126 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1127 if(duplicate) *duplicate = 1;
1130 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 0))
1133 struct auth_rrset* rrsig;
1134 /* create new node with data type */
1135 if(!(rrset=rrset_create(node, rr_type, rr_ttl, rdata,
1139 /* see if node of type RRSIG has signatures that
1140 * cover the data type, and move them over */
1141 /* and then make the RRSIG type smaller */
1142 if((rrsig=az_domain_rrset(node, LDNS_RR_TYPE_RRSIG))
1144 if(!rrset_moveover_rrsigs(node, rr_type,
1153 /** insert RR into zone, ignore duplicates */
1155 az_insert_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
1156 size_t dname_len, int* duplicate)
1158 struct auth_data* node;
1159 uint8_t* dname = rr;
1160 uint16_t rr_type = sldns_wirerr_get_type(rr, rr_len, dname_len);
1161 uint16_t rr_class = sldns_wirerr_get_class(rr, rr_len, dname_len);
1162 uint32_t rr_ttl = sldns_wirerr_get_ttl(rr, rr_len, dname_len);
1163 size_t rdatalen = ((size_t)sldns_wirerr_get_rdatalen(rr, rr_len,
1165 /* rdata points to rdata prefixed with uint16 rdatalength */
1166 uint8_t* rdata = sldns_wirerr_get_rdatawl(rr, rr_len, dname_len);
1168 if(rr_class != z->dclass) {
1169 log_err("wrong class for RR");
1172 if(!(node=az_domain_find_or_create(z, dname, dname_len))) {
1173 log_err("cannot create domain");
1176 if(!az_domain_add_rr(node, rr_type, rr_ttl, rdata, rdatalen,
1178 log_err("cannot add RR to domain");
1184 /** Remove rr from node, ignores nonexisting RRs,
1185 * rdata points to buffer with rdatalen octets, starts with 2bytelength. */
1187 az_domain_remove_rr(struct auth_data* node, uint16_t rr_type,
1188 uint8_t* rdata, size_t rdatalen, int* nonexist)
1190 struct auth_rrset* rrset;
1193 /* find the plain RR of the given type */
1194 if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1195 if(az_rrset_find_rr(rrset->data, rdata, rdatalen, &index)) {
1196 if(rrset->data->count == 1 &&
1197 rrset->data->rrsig_count == 0) {
1198 /* last RR, delete the rrset */
1199 domain_remove_rrset(node, rr_type);
1200 } else if(rrset->data->count == 1 &&
1201 rrset->data->rrsig_count != 0) {
1202 /* move RRSIGs to the RRSIG rrset, or
1203 * this one becomes that RRset */
1204 struct auth_rrset* rrsigset = az_domain_rrset(
1205 node, LDNS_RR_TYPE_RRSIG);
1207 /* move left over rrsigs to the
1208 * existing rrset of type RRSIG */
1209 rrsigs_copy_from_rrset_to_rrsigset(
1211 /* and then delete the rrset */
1212 domain_remove_rrset(node, rr_type);
1214 /* no rrset of type RRSIG, this
1215 * set is now of that type,
1216 * just remove the rr */
1217 if(!rrset_remove_rr(rrset, index))
1219 rrset->type = LDNS_RR_TYPE_RRSIG;
1220 rrset->data->count = rrset->data->rrsig_count;
1221 rrset->data->rrsig_count = 0;
1224 /* remove the RR from the rrset */
1225 if(!rrset_remove_rr(rrset, index))
1230 /* rr not found in rrset */
1233 /* is it a type RRSIG, look under the covered type */
1234 if(rr_type == LDNS_RR_TYPE_RRSIG) {
1235 uint16_t ctype = rrsig_rdata_get_type_covered(rdata, rdatalen);
1236 if((rrset=az_domain_rrset(node, ctype))!= NULL) {
1237 if(az_rrset_find_rrsig(rrset->data, rdata, rdatalen,
1239 /* rrsig should have d->count > 0, be
1240 * over some rr of that type */
1241 /* remove the rrsig from the rrsigs list of the
1243 if(!rrset_remove_rr(rrset, index))
1248 /* also RRSIG not found */
1251 /* nothing found to delete */
1252 if(nonexist) *nonexist = 1;
1256 /** remove RR from zone, ignore if it does not exist, false on alloc failure*/
1258 az_remove_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
1259 size_t dname_len, int* nonexist)
1261 struct auth_data* node;
1262 uint8_t* dname = rr;
1263 uint16_t rr_type = sldns_wirerr_get_type(rr, rr_len, dname_len);
1264 uint16_t rr_class = sldns_wirerr_get_class(rr, rr_len, dname_len);
1265 size_t rdatalen = ((size_t)sldns_wirerr_get_rdatalen(rr, rr_len,
1267 /* rdata points to rdata prefixed with uint16 rdatalength */
1268 uint8_t* rdata = sldns_wirerr_get_rdatawl(rr, rr_len, dname_len);
1270 if(rr_class != z->dclass) {
1271 log_err("wrong class for RR");
1272 /* really also a nonexisting entry, because no records
1273 * of that class in the zone, but return an error because
1274 * getting records of the wrong class is a failure of the
1278 node = az_find_name(z, dname, dname_len);
1280 /* node with that name does not exist */
1281 /* nonexisting entry, because no such name */
1285 if(!az_domain_remove_rr(node, rr_type, rdata, rdatalen, nonexist)) {
1286 /* alloc failure or so */
1289 /* remove the node, if necessary */
1290 /* an rrsets==NULL entry is not kept around for empty nonterminals,
1291 * and also parent nodes are not kept around, so we just delete it */
1292 if(node->rrsets == NULL) {
1293 (void)rbtree_delete(&z->data, node);
1294 auth_data_delete(node);
1299 /** decompress an RR into the buffer where it'll be an uncompressed RR
1300 * with uncompressed dname and uncompressed rdata (dnames) */
1302 decompress_rr_into_buffer(struct sldns_buffer* buf, uint8_t* pkt,
1303 size_t pktlen, uint8_t* dname, uint16_t rr_type, uint16_t rr_class,
1304 uint32_t rr_ttl, uint8_t* rr_data, uint16_t rr_rdlen)
1306 sldns_buffer pktbuf;
1307 size_t dname_len = 0;
1311 const sldns_rr_descriptor* desc;
1312 sldns_buffer_init_frm_data(&pktbuf, pkt, pktlen);
1313 sldns_buffer_clear(buf);
1315 /* decompress dname */
1316 sldns_buffer_set_position(&pktbuf,
1317 (size_t)(dname - sldns_buffer_current(&pktbuf)));
1318 dname_len = pkt_dname_len(&pktbuf);
1319 if(dname_len == 0) return 0; /* parse fail on dname */
1320 if(!sldns_buffer_available(buf, dname_len)) return 0;
1321 dname_pkt_copy(&pktbuf, sldns_buffer_current(buf), dname);
1322 sldns_buffer_skip(buf, (ssize_t)dname_len);
1324 /* type, class, ttl and rdatalength fields */
1325 if(!sldns_buffer_available(buf, 10)) return 0;
1326 sldns_buffer_write_u16(buf, rr_type);
1327 sldns_buffer_write_u16(buf, rr_class);
1328 sldns_buffer_write_u32(buf, rr_ttl);
1329 rdlenpos = sldns_buffer_position(buf);
1330 sldns_buffer_write_u16(buf, 0); /* rd length position */
1332 /* decompress rdata */
1333 desc = sldns_rr_descript(rr_type);
1336 if(rdlen > 0 && desc && desc->_dname_count > 0) {
1337 int count = (int)desc->_dname_count;
1339 size_t len; /* how much rdata to plain copy */
1340 size_t uncompressed_len, compressed_len;
1342 /* decompress dnames. */
1343 while(rdlen > 0 && count) {
1344 switch(desc->_wireformat[rdf]) {
1345 case LDNS_RDF_TYPE_DNAME:
1346 sldns_buffer_set_position(&pktbuf,
1348 sldns_buffer_begin(&pktbuf)));
1349 oldpos = sldns_buffer_position(&pktbuf);
1350 /* moves pktbuf to right after the
1351 * compressed dname, and returns uncompressed
1353 uncompressed_len = pkt_dname_len(&pktbuf);
1354 if(!uncompressed_len)
1355 return 0; /* parse error in dname */
1356 if(!sldns_buffer_available(buf,
1358 /* dname too long for buffer */
1360 dname_pkt_copy(&pktbuf,
1361 sldns_buffer_current(buf), rd);
1362 sldns_buffer_skip(buf, (ssize_t)uncompressed_len);
1363 compressed_len = sldns_buffer_position(
1365 rd += compressed_len;
1366 rdlen -= compressed_len;
1370 case LDNS_RDF_TYPE_STR:
1374 len = get_rdf_size(desc->_wireformat[rdf]);
1378 if(!sldns_buffer_available(buf, len))
1379 return 0; /* too long for buffer */
1380 sldns_buffer_write(buf, rd, len);
1387 /* copy remaining data */
1389 if(!sldns_buffer_available(buf, rdlen)) return 0;
1390 sldns_buffer_write(buf, rd, rdlen);
1392 /* fixup rdlength */
1393 sldns_buffer_write_u16_at(buf, rdlenpos,
1394 sldns_buffer_position(buf)-rdlenpos-2);
1395 sldns_buffer_flip(buf);
1399 /** insert RR into zone, from packet, decompress RR,
1400 * if duplicate is nonNULL set the flag but otherwise ignore duplicates */
1402 az_insert_rr_decompress(struct auth_zone* z, uint8_t* pkt, size_t pktlen,
1403 struct sldns_buffer* scratch_buffer, uint8_t* dname, uint16_t rr_type,
1404 uint16_t rr_class, uint32_t rr_ttl, uint8_t* rr_data,
1405 uint16_t rr_rdlen, int* duplicate)
1410 if(!decompress_rr_into_buffer(scratch_buffer, pkt, pktlen, dname,
1411 rr_type, rr_class, rr_ttl, rr_data, rr_rdlen)) {
1412 log_err("could not decompress RR");
1415 rr = sldns_buffer_begin(scratch_buffer);
1416 rr_len = sldns_buffer_limit(scratch_buffer);
1417 dname_len = dname_valid(rr, rr_len);
1418 return az_insert_rr(z, rr, rr_len, dname_len, duplicate);
1421 /** remove RR from zone, from packet, decompress RR,
1422 * if nonexist is nonNULL set the flag but otherwise ignore nonexisting entries*/
1424 az_remove_rr_decompress(struct auth_zone* z, uint8_t* pkt, size_t pktlen,
1425 struct sldns_buffer* scratch_buffer, uint8_t* dname, uint16_t rr_type,
1426 uint16_t rr_class, uint32_t rr_ttl, uint8_t* rr_data,
1427 uint16_t rr_rdlen, int* nonexist)
1432 if(!decompress_rr_into_buffer(scratch_buffer, pkt, pktlen, dname,
1433 rr_type, rr_class, rr_ttl, rr_data, rr_rdlen)) {
1434 log_err("could not decompress RR");
1437 rr = sldns_buffer_begin(scratch_buffer);
1438 rr_len = sldns_buffer_limit(scratch_buffer);
1439 dname_len = dname_valid(rr, rr_len);
1440 return az_remove_rr(z, rr, rr_len, dname_len, nonexist);
1445 * @param z: zone to read in.
1446 * @param in: file to read from (just opened).
1447 * @param rr: buffer to use for RRs, 64k.
1448 * passed so that recursive includes can use the same buffer and do
1449 * not grow the stack too much.
1450 * @param rrbuflen: sizeof rr buffer.
1451 * @param state: parse state with $ORIGIN, $TTL and 'prev-dname' and so on,
1452 * that is kept between includes.
1453 * The lineno is set at 1 and then increased by the function.
1454 * @param fname: file name.
1455 * @param depth: recursion depth for includes
1456 * @param cfg: config for chroot.
1457 * returns false on failure, has printed an error message
1460 az_parse_file(struct auth_zone* z, FILE* in, uint8_t* rr, size_t rrbuflen,
1461 struct sldns_file_parse_state* state, char* fname, int depth,
1462 struct config_file* cfg)
1464 size_t rr_len, dname_len;
1471 status = sldns_fp2wire_rr_buf(in, rr, &rr_len, &dname_len,
1473 if(status == LDNS_WIREPARSE_ERR_INCLUDE && rr_len == 0) {
1474 /* we have $INCLUDE or $something */
1475 if(strncmp((char*)rr, "$INCLUDE ", 9) == 0 ||
1476 strncmp((char*)rr, "$INCLUDE\t", 9) == 0) {
1478 int lineno_orig = state->lineno;
1479 char* incfile = (char*)rr + 8;
1480 if(depth > MAX_INCLUDE_DEPTH) {
1481 log_err("%s:%d max include depth"
1482 "exceeded", fname, state->lineno);
1486 while(*incfile == ' ' || *incfile == '\t')
1488 /* adjust for chroot on include file */
1489 if(cfg->chrootdir && cfg->chrootdir[0] &&
1490 strncmp(incfile, cfg->chrootdir,
1491 strlen(cfg->chrootdir)) == 0)
1492 incfile += strlen(cfg->chrootdir);
1493 incfile = strdup(incfile);
1495 log_err("malloc failure");
1498 verbose(VERB_ALGO, "opening $INCLUDE %s",
1500 inc = fopen(incfile, "r");
1502 log_err("%s:%d cannot open include "
1503 "file %s: %s", fname,
1504 lineno_orig, incfile,
1509 /* recurse read that file now */
1510 if(!az_parse_file(z, inc, rr, rrbuflen,
1511 state, incfile, depth+1, cfg)) {
1512 log_err("%s:%d cannot parse include "
1514 lineno_orig, incfile);
1520 verbose(VERB_ALGO, "done with $INCLUDE %s",
1523 state->lineno = lineno_orig;
1528 log_err("parse error %s %d:%d: %s", fname,
1529 state->lineno, LDNS_WIREPARSE_OFFSET(status),
1530 sldns_get_errorstr_parse(status));
1534 /* EMPTY line, TTL or ORIGIN */
1537 /* insert wirerr in rrbuf */
1538 if(!az_insert_rr(z, rr, rr_len, dname_len, NULL)) {
1540 sldns_wire2str_type_buf(sldns_wirerr_get_type(rr,
1541 rr_len, dname_len), buf, sizeof(buf));
1542 log_err("%s:%d cannot insert RR of type %s",
1543 fname, state->lineno, buf);
1551 auth_zone_read_zonefile(struct auth_zone* z, struct config_file* cfg)
1553 uint8_t rr[LDNS_RR_BUF_SIZE];
1554 struct sldns_file_parse_state state;
1557 if(!z || !z->zonefile || z->zonefile[0]==0)
1558 return 1; /* no file, or "", nothing to read */
1560 zfilename = z->zonefile;
1561 if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(zfilename,
1562 cfg->chrootdir, strlen(cfg->chrootdir)) == 0)
1563 zfilename += strlen(cfg->chrootdir);
1564 if(verbosity >= VERB_ALGO) {
1566 dname_str(z->name, nm);
1567 verbose(VERB_ALGO, "read zonefile %s for %s", zfilename, nm);
1569 in = fopen(zfilename, "r");
1571 char* n = sldns_wire2str_dname(z->name, z->namelen);
1572 if(z->zone_is_slave && errno == ENOENT) {
1573 /* we fetch the zone contents later, no file yet */
1574 verbose(VERB_ALGO, "no zonefile %s for %s",
1575 zfilename, n?n:"error");
1579 log_err("cannot open zonefile %s for %s: %s",
1580 zfilename, n?n:"error", strerror(errno));
1585 /* clear the data tree */
1586 traverse_postorder(&z->data, auth_data_del, NULL);
1587 rbtree_init(&z->data, &auth_data_cmp);
1589 memset(&state, 0, sizeof(state));
1590 /* default TTL to 3600 */
1591 state.default_ttl = 3600;
1592 /* set $ORIGIN to the zone name */
1593 if(z->namelen <= sizeof(state.origin)) {
1594 memcpy(state.origin, z->name, z->namelen);
1595 state.origin_len = z->namelen;
1597 /* parse the (toplevel) file */
1598 if(!az_parse_file(z, in, rr, sizeof(rr), &state, zfilename, 0, cfg)) {
1599 char* n = sldns_wire2str_dname(z->name, z->namelen);
1600 log_err("error parsing zonefile %s for %s",
1601 zfilename, n?n:"error");
1610 /** write buffer to file and check return codes */
1612 write_out(FILE* out, const char* str, size_t len)
1617 r = fwrite(str, 1, len, out);
1619 log_err("write failed: %s", strerror(errno));
1621 } else if(r < len) {
1622 log_err("write failed: too short (disk full?)");
1628 /** convert auth rr to string */
1630 auth_rr_to_string(uint8_t* nm, size_t nmlen, uint16_t tp, uint16_t cl,
1631 struct packed_rrset_data* data, size_t i, char* s, size_t buflen)
1634 size_t slen = buflen, datlen;
1636 if(i >= data->count) tp = LDNS_RR_TYPE_RRSIG;
1639 w += sldns_wire2str_dname_scan(&dat, &datlen, &s, &slen, NULL, 0, NULL);
1640 w += sldns_str_print(&s, &slen, "\t");
1641 w += sldns_str_print(&s, &slen, "%lu\t", (unsigned long)data->rr_ttl[i]);
1642 w += sldns_wire2str_class_print(&s, &slen, cl);
1643 w += sldns_str_print(&s, &slen, "\t");
1644 w += sldns_wire2str_type_print(&s, &slen, tp);
1645 w += sldns_str_print(&s, &slen, "\t");
1646 datlen = data->rr_len[i]-2;
1647 dat = data->rr_data[i]+2;
1648 w += sldns_wire2str_rdata_scan(&dat, &datlen, &s, &slen, tp, NULL, 0, NULL);
1650 if(tp == LDNS_RR_TYPE_DNSKEY) {
1651 w += sldns_str_print(&s, &slen, " ;{id = %u}",
1652 sldns_calc_keytag_raw(data->rr_data[i]+2,
1653 data->rr_len[i]-2));
1655 w += sldns_str_print(&s, &slen, "\n");
1657 if(w >= (int)buflen) {
1658 log_nametypeclass(NO_VERBOSE, "RR too long to print", nm, tp, cl);
1664 /** write rrset to file */
1666 auth_zone_write_rrset(struct auth_zone* z, struct auth_data* node,
1667 struct auth_rrset* r, FILE* out)
1669 size_t i, count = r->data->count + r->data->rrsig_count;
1670 char buf[LDNS_RR_BUF_SIZE];
1671 for(i=0; i<count; i++) {
1672 if(!auth_rr_to_string(node->name, node->namelen, r->type,
1673 z->dclass, r->data, i, buf, sizeof(buf))) {
1674 verbose(VERB_ALGO, "failed to rr2str rr %d", (int)i);
1677 if(!write_out(out, buf, strlen(buf)))
1683 /** write domain to file */
1685 auth_zone_write_domain(struct auth_zone* z, struct auth_data* n, FILE* out)
1687 struct auth_rrset* r;
1688 /* if this is zone apex, write SOA first */
1689 if(z->namelen == n->namelen) {
1690 struct auth_rrset* soa = az_domain_rrset(n, LDNS_RR_TYPE_SOA);
1692 if(!auth_zone_write_rrset(z, n, soa, out))
1696 /* write all the RRsets for this domain */
1697 for(r = n->rrsets; r; r = r->next) {
1698 if(z->namelen == n->namelen &&
1699 r->type == LDNS_RR_TYPE_SOA)
1700 continue; /* skip SOA here */
1701 if(!auth_zone_write_rrset(z, n, r, out))
1707 int auth_zone_write_file(struct auth_zone* z, const char* fname)
1710 struct auth_data* n;
1711 out = fopen(fname, "w");
1713 log_err("could not open %s: %s", fname, strerror(errno));
1716 RBTREE_FOR(n, struct auth_data*, &z->data) {
1717 if(!auth_zone_write_domain(z, n, out)) {
1718 log_err("could not write domain to %s", fname);
1727 /** read all auth zones from file (if they have) */
1729 auth_zones_read_zones(struct auth_zones* az, struct config_file* cfg)
1731 struct auth_zone* z;
1732 lock_rw_wrlock(&az->lock);
1733 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1734 lock_rw_wrlock(&z->lock);
1735 if(!auth_zone_read_zonefile(z, cfg)) {
1736 lock_rw_unlock(&z->lock);
1737 lock_rw_unlock(&az->lock);
1740 lock_rw_unlock(&z->lock);
1742 lock_rw_unlock(&az->lock);
1746 /** find serial number of zone or false if none */
1748 auth_zone_get_serial(struct auth_zone* z, uint32_t* serial)
1750 struct auth_data* apex;
1751 struct auth_rrset* soa;
1752 struct packed_rrset_data* d;
1753 apex = az_find_name(z, z->name, z->namelen);
1755 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
1756 if(!soa || soa->data->count==0)
1757 return 0; /* no RRset or no RRs in rrset */
1758 if(soa->data->rr_len[0] < 2+4*5) return 0; /* SOA too short */
1760 *serial = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-20));
1764 /** Find auth_zone SOA and populate the values in xfr(soa values). */
1766 xfr_find_soa(struct auth_zone* z, struct auth_xfer* xfr)
1768 struct auth_data* apex;
1769 struct auth_rrset* soa;
1770 struct packed_rrset_data* d;
1771 apex = az_find_name(z, z->name, z->namelen);
1773 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
1774 if(!soa || soa->data->count==0)
1775 return 0; /* no RRset or no RRs in rrset */
1776 if(soa->data->rr_len[0] < 2+4*5) return 0; /* SOA too short */
1777 /* SOA record ends with serial, refresh, retry, expiry, minimum,
1778 * as 4 byte fields */
1781 xfr->serial = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-20));
1782 xfr->refresh = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-16));
1783 xfr->retry = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-12));
1784 xfr->expiry = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-8));
1785 /* soa minimum at d->rr_len[0]-4 */
1790 * Setup auth_xfer zone
1791 * This populates the have_zone, soa values, and so on times.
1792 * Doesn't do network traffic yet, can set option flags.
1793 * @param z: locked by caller, and modified for setup
1794 * @param x: locked by caller, and modified.
1795 * @return false on failure.
1798 auth_xfer_setup(struct auth_zone* z, struct auth_xfer* x)
1800 /* for a zone without zone transfers, x==NULL, so skip them,
1801 * i.e. the zone config is fixed with no masters or urls */
1802 if(!z || !x) return 1;
1803 if(!xfr_find_soa(z, x)) {
1806 /* nothing for probe, nextprobe and transfer tasks */
1812 * @param az: auth zones structure
1813 * @return false on failure.
1816 auth_zones_setup_zones(struct auth_zones* az)
1818 struct auth_zone* z;
1819 struct auth_xfer* x;
1820 lock_rw_wrlock(&az->lock);
1821 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1822 lock_rw_wrlock(&z->lock);
1823 x = auth_xfer_find(az, z->name, z->namelen, z->dclass);
1825 lock_basic_lock(&x->lock);
1827 if(!auth_xfer_setup(z, x)) {
1829 lock_basic_unlock(&x->lock);
1831 lock_rw_unlock(&z->lock);
1832 lock_rw_unlock(&az->lock);
1836 lock_basic_unlock(&x->lock);
1838 lock_rw_unlock(&z->lock);
1840 lock_rw_unlock(&az->lock);
1844 /** set config items and create zones */
1846 auth_zones_cfg(struct auth_zones* az, struct config_auth* c)
1848 struct auth_zone* z;
1849 struct auth_xfer* x = NULL;
1852 lock_rw_wrlock(&az->lock);
1853 if(!(z=auth_zones_find_or_add_zone(az, c->name))) {
1854 lock_rw_unlock(&az->lock);
1857 if(c->masters || c->urls) {
1858 if(!(x=auth_zones_find_or_add_xfer(az, z))) {
1859 lock_rw_unlock(&az->lock);
1860 lock_rw_unlock(&z->lock);
1864 if(c->for_downstream)
1865 az->have_downstream = 1;
1866 lock_rw_unlock(&az->lock);
1869 z->zone_deleted = 0;
1870 if(!auth_zone_set_zonefile(z, c->zonefile)) {
1872 lock_basic_unlock(&x->lock);
1874 lock_rw_unlock(&z->lock);
1877 z->for_downstream = c->for_downstream;
1878 z->for_upstream = c->for_upstream;
1879 z->fallback_enabled = c->fallback_enabled;
1883 z->zone_is_slave = 1;
1884 /* set options on xfer zone */
1885 if(!xfer_set_masters(&x->task_probe->masters, c, 0)) {
1886 lock_basic_unlock(&x->lock);
1887 lock_rw_unlock(&z->lock);
1890 if(!xfer_set_masters(&x->task_transfer->masters, c, 1)) {
1891 lock_basic_unlock(&x->lock);
1892 lock_rw_unlock(&z->lock);
1895 lock_basic_unlock(&x->lock);
1898 lock_rw_unlock(&z->lock);
1902 /** set all auth zones deleted, then in auth_zones_cfg, it marks them
1903 * as nondeleted (if they are still in the config), and then later
1904 * we can find deleted zones */
1906 az_setall_deleted(struct auth_zones* az)
1908 struct auth_zone* z;
1909 lock_rw_wrlock(&az->lock);
1910 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1911 lock_rw_wrlock(&z->lock);
1912 z->zone_deleted = 1;
1913 lock_rw_unlock(&z->lock);
1915 lock_rw_unlock(&az->lock);
1918 /** find zones that are marked deleted and delete them.
1919 * This is called from apply_cfg, and there are no threads and no
1920 * workers, so the xfr can just be deleted. */
1922 az_delete_deleted_zones(struct auth_zones* az)
1924 struct auth_zone* z;
1925 struct auth_zone* delete_list = NULL, *next;
1926 struct auth_xfer* xfr;
1927 lock_rw_wrlock(&az->lock);
1928 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1929 lock_rw_wrlock(&z->lock);
1930 if(z->zone_deleted) {
1931 /* we cannot alter the rbtree right now, but
1932 * we can put it on a linked list and then
1934 z->delete_next = delete_list;
1937 lock_rw_unlock(&z->lock);
1939 /* now we are out of the tree loop and we can loop and delete
1943 next = z->delete_next;
1944 xfr = auth_xfer_find(az, z->name, z->namelen, z->dclass);
1946 (void)rbtree_delete(&az->xtree, &xfr->node);
1947 auth_xfer_delete(xfr);
1949 (void)rbtree_delete(&az->ztree, &z->node);
1950 auth_zone_delete(z);
1953 lock_rw_unlock(&az->lock);
1956 int auth_zones_apply_cfg(struct auth_zones* az, struct config_file* cfg,
1959 struct config_auth* p;
1960 az_setall_deleted(az);
1961 for(p = cfg->auths; p; p = p->next) {
1962 if(!p->name || p->name[0] == 0) {
1963 log_warn("auth-zone without a name, skipped");
1966 if(!auth_zones_cfg(az, p)) {
1967 log_err("cannot config auth zone %s", p->name);
1971 az_delete_deleted_zones(az);
1972 if(!auth_zones_read_zones(az, cfg))
1975 if(!auth_zones_setup_zones(az))
1982 * @param at: transfer structure with chunks list. The chunks and their
1986 auth_chunks_delete(struct auth_transfer* at)
1988 if(at->chunks_first) {
1989 struct auth_chunk* c, *cn;
1990 c = at->chunks_first;
1998 at->chunks_first = NULL;
1999 at->chunks_last = NULL;
2002 /** free master addr list */
2004 auth_free_master_addrs(struct auth_addr* list)
2006 struct auth_addr *n;
2014 /** free the masters list */
2016 auth_free_masters(struct auth_master* list)
2018 struct auth_master* n;
2021 auth_free_master_addrs(list->list);
2029 /** delete auth xfer structure
2030 * @param xfr: delete this xfer and its tasks.
2033 auth_xfer_delete(struct auth_xfer* xfr)
2036 lock_basic_destroy(&xfr->lock);
2038 if(xfr->task_nextprobe) {
2039 comm_timer_delete(xfr->task_nextprobe->timer);
2040 free(xfr->task_nextprobe);
2042 if(xfr->task_probe) {
2043 auth_free_masters(xfr->task_probe->masters);
2044 comm_point_delete(xfr->task_probe->cp);
2045 comm_timer_delete(xfr->task_probe->timer);
2046 free(xfr->task_probe);
2048 if(xfr->task_transfer) {
2049 auth_free_masters(xfr->task_transfer->masters);
2050 comm_point_delete(xfr->task_transfer->cp);
2051 comm_timer_delete(xfr->task_transfer->timer);
2052 if(xfr->task_transfer->chunks_first) {
2053 auth_chunks_delete(xfr->task_transfer);
2055 free(xfr->task_transfer);
2057 auth_free_masters(xfr->allow_notify_list);
2061 /** helper traverse to delete zones */
2063 auth_zone_del(rbnode_type* n, void* ATTR_UNUSED(arg))
2065 struct auth_zone* z = (struct auth_zone*)n->key;
2066 auth_zone_delete(z);
2069 /** helper traverse to delete xfer zones */
2071 auth_xfer_del(rbnode_type* n, void* ATTR_UNUSED(arg))
2073 struct auth_xfer* z = (struct auth_xfer*)n->key;
2074 auth_xfer_delete(z);
2077 void auth_zones_delete(struct auth_zones* az)
2080 lock_rw_destroy(&az->lock);
2081 traverse_postorder(&az->ztree, auth_zone_del, NULL);
2082 traverse_postorder(&az->xtree, auth_xfer_del, NULL);
2086 /** true if domain has only nsec3 */
2088 domain_has_only_nsec3(struct auth_data* n)
2090 struct auth_rrset* rrset = n->rrsets;
2093 if(rrset->type == LDNS_RR_TYPE_NSEC3) {
2095 } else if(rrset->type != LDNS_RR_TYPE_RRSIG) {
2098 rrset = rrset->next;
2103 /** see if the domain has a wildcard child '*.domain' */
2104 static struct auth_data*
2105 az_find_wildcard_domain(struct auth_zone* z, uint8_t* nm, size_t nmlen)
2107 uint8_t wc[LDNS_MAX_DOMAINLEN];
2108 if(nmlen+2 > sizeof(wc))
2109 return NULL; /* result would be too long */
2110 wc[0] = 1; /* length of wildcard label */
2111 wc[1] = (uint8_t)'*'; /* wildcard label */
2112 memmove(wc+2, nm, nmlen);
2113 return az_find_name(z, wc, nmlen+2);
2116 /** find wildcard between qname and cename */
2117 static struct auth_data*
2118 az_find_wildcard(struct auth_zone* z, struct query_info* qinfo,
2119 struct auth_data* ce)
2121 uint8_t* nm = qinfo->qname;
2122 size_t nmlen = qinfo->qname_len;
2123 struct auth_data* node;
2124 if(!dname_subdomain_c(nm, z->name))
2125 return NULL; /* out of zone */
2126 while((node=az_find_wildcard_domain(z, nm, nmlen))==NULL) {
2127 /* see if we can go up to find the wildcard */
2128 if(nmlen == z->namelen)
2129 return NULL; /* top of zone reached */
2130 if(ce && nmlen == ce->namelen)
2131 return NULL; /* ce reached */
2132 if(dname_is_root(nm))
2133 return NULL; /* cannot go up */
2134 dname_remove_label(&nm, &nmlen);
2139 /** domain is not exact, find first candidate ce (name that matches
2140 * a part of qname) in tree */
2141 static struct auth_data*
2142 az_find_candidate_ce(struct auth_zone* z, struct query_info* qinfo,
2143 struct auth_data* n)
2148 nm = dname_get_shared_topdomain(qinfo->qname, n->name);
2152 dname_count_size_labels(nm, &nmlen);
2153 n = az_find_name(z, nm, nmlen);
2154 /* delete labels and go up on name */
2156 if(dname_is_root(nm))
2157 return NULL; /* cannot go up */
2158 dname_remove_label(&nm, &nmlen);
2159 n = az_find_name(z, nm, nmlen);
2164 /** go up the auth tree to next existing name. */
2165 static struct auth_data*
2166 az_domain_go_up(struct auth_zone* z, struct auth_data* n)
2168 uint8_t* nm = n->name;
2169 size_t nmlen = n->namelen;
2170 while(!dname_is_root(nm)) {
2171 dname_remove_label(&nm, &nmlen);
2172 if((n=az_find_name(z, nm, nmlen)) != NULL)
2178 /** Find the closest encloser, an name that exists and is above the
2180 * return true if the node (param node) is existing, nonobscured and
2181 * can be used to generate answers from. It is then also node_exact.
2182 * returns false if the node is not good enough (or it wasn't node_exact)
2183 * in this case the ce can be filled.
2184 * if ce is NULL, no ce exists, and likely the zone is completely empty,
2185 * not even with a zone apex.
2186 * if ce is nonNULL it is the closest enclosing upper name (that exists
2187 * itself for answer purposes). That name may have DNAME, NS or wildcard
2188 * rrset is the closest DNAME or NS rrset that was found.
2191 az_find_ce(struct auth_zone* z, struct query_info* qinfo,
2192 struct auth_data* node, int node_exact, struct auth_data** ce,
2193 struct auth_rrset** rrset)
2195 struct auth_data* n = node;
2199 /* if not exact, lookup closest exact match */
2200 n = az_find_candidate_ce(z, qinfo, n);
2202 /* if exact, the node itself is the first candidate ce */
2206 /* no direct answer from nsec3-only domains */
2207 if(n && domain_has_only_nsec3(n)) {
2212 /* with exact matches, walk up the labels until we find the
2213 * delegation, or DNAME or zone end */
2215 /* see if the current candidate has issues */
2216 /* not zone apex and has type NS */
2217 if(n->namelen != z->namelen &&
2218 (*rrset=az_domain_rrset(n, LDNS_RR_TYPE_NS)) &&
2219 /* delegate here, but DS at exact the dp has notype */
2220 (qinfo->qtype != LDNS_RR_TYPE_DS ||
2221 n->namelen != qinfo->qname_len)) {
2223 /* this is ce and the lowernode is nonexisting */
2227 /* not equal to qname and has type DNAME */
2228 if(n->namelen != qinfo->qname_len &&
2229 (*rrset=az_domain_rrset(n, LDNS_RR_TYPE_DNAME))) {
2230 /* this is ce and the lowernode is nonexisting */
2235 if(*ce == NULL && !domain_has_only_nsec3(n)) {
2236 /* if not found yet, this exact name must be
2237 * our lowest match (but not nsec3onlydomain) */
2241 /* walk up the tree by removing labels from name and lookup */
2242 n = az_domain_go_up(z, n);
2244 /* found no problems, if it was an exact node, it is fine to use */
2248 /** add additional A/AAAA from domain names in rrset rdata (+offset)
2249 * offset is number of bytes in rdata where the dname is located. */
2251 az_add_additionals_from(struct auth_zone* z, struct regional* region,
2252 struct dns_msg* msg, struct auth_rrset* rrset, size_t offset)
2254 struct packed_rrset_data* d = rrset->data;
2257 for(i=0; i<d->count; i++) {
2259 struct auth_data* domain;
2260 struct auth_rrset* ref;
2261 if(d->rr_len[i] < 2+offset)
2262 continue; /* too short */
2263 if(!(dlen = dname_valid(d->rr_data[i]+2+offset,
2264 d->rr_len[i]-2-offset)))
2265 continue; /* malformed */
2266 domain = az_find_name(z, d->rr_data[i]+2+offset, dlen);
2269 if((ref=az_domain_rrset(domain, LDNS_RR_TYPE_A)) != NULL) {
2270 if(!msg_add_rrset_ar(z, region, msg, domain, ref))
2273 if((ref=az_domain_rrset(domain, LDNS_RR_TYPE_AAAA)) != NULL) {
2274 if(!msg_add_rrset_ar(z, region, msg, domain, ref))
2281 /** add negative SOA record (with negative TTL) */
2283 az_add_negative_soa(struct auth_zone* z, struct regional* region,
2284 struct dns_msg* msg)
2287 struct packed_rrset_data* d;
2288 struct auth_rrset* soa;
2289 struct auth_data* apex = az_find_name(z, z->name, z->namelen);
2291 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
2293 /* must be first to put in message; we want to fix the TTL with
2294 * one RRset here, otherwise we'd need to loop over the RRs to get
2295 * the resulting lower TTL */
2296 log_assert(msg->rep->rrset_count == 0);
2297 if(!msg_add_rrset_ns(z, region, msg, apex, soa)) return 0;
2299 d = (struct packed_rrset_data*)msg->rep->rrsets[msg->rep->rrset_count-1]->entry.data;
2300 /* last 4 bytes are minimum ttl in network format */
2301 if(d->count == 0) return 0;
2302 if(d->rr_len[0] < 2+4) return 0;
2303 minimum = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-4));
2304 d->ttl = (time_t)minimum;
2305 d->rr_ttl[0] = (time_t)minimum;
2306 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[0]);
2307 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
2308 msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
2312 /** See if the query goes to empty nonterminal (that has no auth_data,
2313 * but there are nodes underneath. We already checked that there are
2314 * not NS, or DNAME above, so that we only need to check if some node
2315 * exists below (with nonempty rr list), return true if emptynonterminal */
2317 az_empty_nonterminal(struct auth_zone* z, struct query_info* qinfo,
2318 struct auth_data* node)
2320 struct auth_data* next;
2322 /* no smaller was found, use first (smallest) node as the
2324 next = (struct auth_data*)rbtree_first(&z->data);
2326 next = (struct auth_data*)rbtree_next(&node->node);
2328 while(next && (rbnode_type*)next != RBTREE_NULL && next->rrsets == NULL) {
2329 /* the next name has empty rrsets, is an empty nonterminal
2330 * itself, see if there exists something below it */
2331 next = (struct auth_data*)rbtree_next(&node->node);
2333 if((rbnode_type*)next == RBTREE_NULL || !next) {
2334 /* there is no next node, so something below it cannot
2338 /* a next node exists, if there was something below the query,
2339 * this node has to be it. See if it is below the query name */
2340 if(dname_strict_subdomain_c(next->name, qinfo->qname))
2345 /** create synth cname target name in buffer, or fail if too long */
2347 synth_cname_buf(uint8_t* qname, size_t qname_len, size_t dname_len,
2348 uint8_t* dtarg, size_t dtarglen, uint8_t* buf, size_t buflen)
2350 size_t newlen = qname_len + dtarglen - dname_len;
2351 if(newlen > buflen) {
2352 /* YXDOMAIN error */
2355 /* new name is concatenation of qname front (without DNAME owner)
2356 * and DNAME target name */
2357 memcpy(buf, qname, qname_len-dname_len);
2358 memmove(buf+(qname_len-dname_len), dtarg, dtarglen);
2362 /** create synthetic CNAME rrset for in a DNAME answer in region,
2363 * false on alloc failure, cname==NULL when name too long. */
2365 create_synth_cname(uint8_t* qname, size_t qname_len, struct regional* region,
2366 struct auth_data* node, struct auth_rrset* dname, uint16_t dclass,
2367 struct ub_packed_rrset_key** cname)
2369 uint8_t buf[LDNS_MAX_DOMAINLEN];
2371 size_t dtarglen, newlen;
2372 struct packed_rrset_data* d;
2374 /* get DNAME target name */
2375 if(dname->data->count < 1) return 0;
2376 if(dname->data->rr_len[0] < 3) return 0; /* at least rdatalen +1 */
2377 dtarg = dname->data->rr_data[0]+2;
2378 dtarglen = dname->data->rr_len[0]-2;
2379 if(sldns_read_uint16(dname->data->rr_data[0]) != dtarglen)
2380 return 0; /* rdatalen in DNAME rdata is malformed */
2381 if(dname_valid(dtarg, dtarglen) != dtarglen)
2382 return 0; /* DNAME RR has malformed rdata */
2384 return 0; /* too short */
2385 if(qname_len <= node->namelen)
2386 return 0; /* qname too short for dname removal */
2388 /* synthesize a CNAME */
2389 newlen = synth_cname_buf(qname, qname_len, node->namelen,
2390 dtarg, dtarglen, buf, sizeof(buf));
2392 /* YXDOMAIN error */
2396 *cname = (struct ub_packed_rrset_key*)regional_alloc(region,
2397 sizeof(struct ub_packed_rrset_key));
2399 return 0; /* out of memory */
2400 memset(&(*cname)->entry, 0, sizeof((*cname)->entry));
2401 (*cname)->entry.key = (*cname);
2402 (*cname)->rk.type = htons(LDNS_RR_TYPE_CNAME);
2403 (*cname)->rk.rrset_class = htons(dclass);
2404 (*cname)->rk.flags = 0;
2405 (*cname)->rk.dname = regional_alloc_init(region, qname, qname_len);
2406 if(!(*cname)->rk.dname)
2407 return 0; /* out of memory */
2408 (*cname)->rk.dname_len = qname_len;
2409 (*cname)->entry.hash = rrset_key_hash(&(*cname)->rk);
2410 d = (struct packed_rrset_data*)regional_alloc_zero(region,
2411 sizeof(struct packed_rrset_data) + sizeof(size_t) +
2412 sizeof(uint8_t*) + sizeof(time_t) + sizeof(uint16_t)
2415 return 0; /* out of memory */
2416 (*cname)->entry.data = d;
2417 d->ttl = 0; /* 0 for synthesized CNAME TTL */
2420 d->trust = rrset_trust_ans_noAA;
2421 d->rr_len = (size_t*)((uint8_t*)d +
2422 sizeof(struct packed_rrset_data));
2423 d->rr_len[0] = newlen + sizeof(uint16_t);
2424 packed_rrset_ptr_fixup(d);
2425 d->rr_ttl[0] = d->ttl;
2426 sldns_write_uint16(d->rr_data[0], newlen);
2427 memmove(d->rr_data[0] + sizeof(uint16_t), buf, newlen);
2431 /** add a synthesized CNAME to the answer section */
2433 add_synth_cname(struct auth_zone* z, uint8_t* qname, size_t qname_len,
2434 struct regional* region, struct dns_msg* msg, struct auth_data* dname,
2435 struct auth_rrset* rrset)
2437 struct ub_packed_rrset_key* cname;
2438 /* synthesize a CNAME */
2439 if(!create_synth_cname(qname, qname_len, region, dname, rrset,
2440 z->dclass, &cname)) {
2445 /* cname cannot be create because of YXDOMAIN */
2446 msg->rep->flags |= LDNS_RCODE_YXDOMAIN;
2449 /* add cname to message */
2450 if(!msg_grow_array(region, msg))
2452 msg->rep->rrsets[msg->rep->rrset_count] = cname;
2453 msg->rep->rrset_count++;
2454 msg->rep->an_numrrsets++;
2459 /** Change a dname to a different one, for wildcard namechange */
2461 az_change_dnames(struct dns_msg* msg, uint8_t* oldname, uint8_t* newname,
2462 size_t newlen, int an_only)
2465 size_t start = 0, end = msg->rep->rrset_count;
2466 if(!an_only) start = msg->rep->an_numrrsets;
2467 if(an_only) end = msg->rep->an_numrrsets;
2468 for(i=start; i<end; i++) {
2469 /* allocated in region so we can change the ptrs */
2470 if(query_dname_compare(msg->rep->rrsets[i]->rk.dname, oldname)
2472 msg->rep->rrsets[i]->rk.dname = newname;
2473 msg->rep->rrsets[i]->rk.dname_len = newlen;
2478 /** find NSEC record covering the query */
2479 static struct auth_rrset*
2480 az_find_nsec_cover(struct auth_zone* z, struct auth_data** node)
2482 uint8_t* nm = (*node)->name;
2483 size_t nmlen = (*node)->namelen;
2484 struct auth_rrset* rrset;
2485 /* find the NSEC for the smallest-or-equal node */
2486 /* if node == NULL, we did not find a smaller name. But the zone
2487 * name is the smallest name and should have an NSEC. So there is
2488 * no NSEC to return (for a properly signed zone) */
2489 /* for empty nonterminals, the auth-data node should not exist,
2490 * and thus we don't need to go rbtree_previous here to find
2491 * a domain with an NSEC record */
2492 /* but there could be glue, and if this is node, then it has no NSEC.
2493 * Go up to find nonglue (previous) NSEC-holding nodes */
2494 while((rrset=az_domain_rrset(*node, LDNS_RR_TYPE_NSEC)) == NULL) {
2495 if(dname_is_root(nm)) return NULL;
2496 if(nmlen == z->namelen) return NULL;
2497 dname_remove_label(&nm, &nmlen);
2498 /* adjust *node for the nsec rrset to find in */
2499 *node = az_find_name(z, nm, nmlen);
2504 /** Find NSEC and add for wildcard denial */
2506 az_nsec_wildcard_denial(struct auth_zone* z, struct regional* region,
2507 struct dns_msg* msg, uint8_t* cenm, size_t cenmlen)
2509 struct query_info qinfo;
2511 struct auth_data* node;
2512 struct auth_rrset* nsec;
2513 uint8_t wc[LDNS_MAX_DOMAINLEN];
2514 if(cenmlen+2 > sizeof(wc))
2515 return 0; /* result would be too long */
2516 wc[0] = 1; /* length of wildcard label */
2517 wc[1] = (uint8_t)'*'; /* wildcard label */
2518 memmove(wc+2, cenm, cenmlen);
2520 /* we have '*.ce' in wc wildcard name buffer */
2521 /* get nsec cover for that */
2523 qinfo.qname_len = cenmlen+2;
2526 az_find_domain(z, &qinfo, &node_exact, &node);
2527 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
2528 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
2533 /** Find the NSEC3PARAM rrset (if any) and if true you have the parameters */
2535 az_nsec3_param(struct auth_zone* z, int* algo, size_t* iter, uint8_t** salt,
2538 struct auth_data* apex;
2539 struct auth_rrset* param;
2541 apex = az_find_name(z, z->name, z->namelen);
2543 param = az_domain_rrset(apex, LDNS_RR_TYPE_NSEC3PARAM);
2544 if(!param || param->data->count==0)
2545 return 0; /* no RRset or no RRs in rrset */
2546 /* find out which NSEC3PARAM RR has supported parameters */
2547 /* skip unknown flags (dynamic signer is recalculating nsec3 chain) */
2548 for(i=0; i<param->data->count; i++) {
2549 uint8_t* rdata = param->data->rr_data[i]+2;
2550 size_t rdatalen = param->data->rr_len[i];
2552 continue; /* too short */
2553 if(!nsec3_hash_algo_size_supported((int)(rdata[0])))
2554 continue; /* unsupported algo */
2555 if(rdatalen < (size_t)(2+5+(size_t)rdata[4]))
2556 continue; /* salt missing */
2557 if((rdata[1]&NSEC3_UNKNOWN_FLAGS)!=0)
2558 continue; /* unknown flags */
2559 *algo = (int)(rdata[0]);
2560 *iter = sldns_read_uint16(rdata+2);
2561 *saltlen = rdata[4];
2564 else *salt = rdata+5;
2567 /* no supported params */
2571 /** Hash a name with nsec3param into buffer, it has zone name appended.
2572 * return length of hash */
2574 az_nsec3_hash(uint8_t* buf, size_t buflen, uint8_t* nm, size_t nmlen,
2575 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2577 size_t hlen = nsec3_hash_algo_size_supported(algo);
2578 /* buffer has domain name, nsec3hash, and 256 is for max saltlen
2579 * (salt has 0-255 length) */
2580 unsigned char p[LDNS_MAX_DOMAINLEN+1+N3HASHBUFLEN+256];
2582 if(nmlen+saltlen > sizeof(p) || hlen+saltlen > sizeof(p))
2585 return 0; /* somehow too large for destination buffer */
2586 /* hashfunc(name, salt) */
2587 memmove(p, nm, nmlen);
2588 query_dname_tolower(p);
2589 memmove(p+nmlen, salt, saltlen);
2590 (void)secalgo_nsec3_hash(algo, p, nmlen+saltlen, (unsigned char*)buf);
2591 for(i=0; i<iter; i++) {
2592 /* hashfunc(hash, salt) */
2593 memmove(p, buf, hlen);
2594 memmove(p+hlen, salt, saltlen);
2595 (void)secalgo_nsec3_hash(algo, p, hlen+saltlen,
2596 (unsigned char*)buf);
2601 /** Hash name and return b32encoded hashname for lookup, zone name appended */
2603 az_nsec3_hashname(struct auth_zone* z, uint8_t* hashname, size_t* hashnmlen,
2604 uint8_t* nm, size_t nmlen, int algo, size_t iter, uint8_t* salt,
2607 uint8_t hash[N3HASHBUFLEN];
2610 hlen = az_nsec3_hash(hash, sizeof(hash), nm, nmlen, algo, iter,
2614 if(*hashnmlen < hlen*2+1+z->namelen) /* approx b32 as hexb16 */
2616 ret = sldns_b32_ntop_extended_hex(hash, hlen, (char*)(hashname+1),
2620 hashname[0] = (uint8_t)ret;
2622 if((*hashnmlen) - ret < z->namelen)
2624 memmove(hashname+ret, z->name, z->namelen);
2625 *hashnmlen = z->namelen+(size_t)ret;
2629 /** Find the datanode that covers the nsec3hash-name */
2630 static struct auth_data*
2631 az_nsec3_findnode(struct auth_zone* z, uint8_t* hashnm, size_t hashnmlen)
2633 struct query_info qinfo;
2634 struct auth_data* node;
2638 qinfo.qname = hashnm;
2639 qinfo.qname_len = hashnmlen;
2640 /* because canonical ordering and b32 nsec3 ordering are the same.
2641 * this is a good lookup to find the nsec3 name. */
2642 az_find_domain(z, &qinfo, &node_exact, &node);
2643 /* but we may have to skip non-nsec3 nodes */
2644 /* this may be a lot, the way to speed that up is to have a
2645 * separate nsec3 tree with nsec3 nodes */
2646 while(node && (rbnode_type*)node != RBTREE_NULL &&
2647 !az_domain_rrset(node, LDNS_RR_TYPE_NSEC3)) {
2648 node = (struct auth_data*)rbtree_previous(&node->node);
2650 if((rbnode_type*)node == RBTREE_NULL)
2655 /** Find cover for hashed(nm, nmlen) (or NULL) */
2656 static struct auth_data*
2657 az_nsec3_find_cover(struct auth_zone* z, uint8_t* nm, size_t nmlen,
2658 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2660 struct auth_data* node;
2661 uint8_t hname[LDNS_MAX_DOMAINLEN];
2662 size_t hlen = sizeof(hname);
2663 if(!az_nsec3_hashname(z, hname, &hlen, nm, nmlen, algo, iter,
2666 node = az_nsec3_findnode(z, hname, hlen);
2669 /* we did not find any, perhaps because the NSEC3 hash is before
2670 * the first hash, we have to find the 'last hash' in the zone */
2671 node = (struct auth_data*)rbtree_last(&z->data);
2672 while(node && (rbnode_type*)node != RBTREE_NULL &&
2673 !az_domain_rrset(node, LDNS_RR_TYPE_NSEC3)) {
2674 node = (struct auth_data*)rbtree_previous(&node->node);
2676 if((rbnode_type*)node == RBTREE_NULL)
2681 /** Find exact match for hashed(nm, nmlen) NSEC3 record or NULL */
2682 static struct auth_data*
2683 az_nsec3_find_exact(struct auth_zone* z, uint8_t* nm, size_t nmlen,
2684 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2686 struct auth_data* node;
2687 uint8_t hname[LDNS_MAX_DOMAINLEN];
2688 size_t hlen = sizeof(hname);
2689 if(!az_nsec3_hashname(z, hname, &hlen, nm, nmlen, algo, iter,
2692 node = az_find_name(z, hname, hlen);
2693 if(az_domain_rrset(node, LDNS_RR_TYPE_NSEC3))
2698 /** Return nextcloser name (as a ref into the qname). This is one label
2699 * more than the cenm (cename must be a suffix of qname) */
2701 az_nsec3_get_nextcloser(uint8_t* cenm, uint8_t* qname, size_t qname_len,
2702 uint8_t** nx, size_t* nxlen)
2704 int celabs = dname_count_labels(cenm);
2705 int qlabs = dname_count_labels(qname);
2706 int strip = qlabs - celabs -1;
2707 log_assert(dname_strict_subdomain(qname, qlabs, cenm, celabs));
2711 dname_remove_labels(nx, nxlen, strip);
2714 /** Find the closest encloser that has exact NSEC3.
2715 * updated cenm to the new name. If it went up no-exact-ce is true. */
2716 static struct auth_data*
2717 az_nsec3_find_ce(struct auth_zone* z, uint8_t** cenm, size_t* cenmlen,
2718 int* no_exact_ce, int algo, size_t iter, uint8_t* salt, size_t saltlen)
2720 struct auth_data* node;
2721 while((node = az_nsec3_find_exact(z, *cenm, *cenmlen,
2722 algo, iter, salt, saltlen)) == NULL) {
2723 if(*cenmlen == z->namelen) {
2724 /* next step up would take us out of the zone. fail */
2728 dname_remove_label(cenm, cenmlen);
2733 /* Insert NSEC3 record in authority section, if NULL does nothing */
2735 az_nsec3_insert(struct auth_zone* z, struct regional* region,
2736 struct dns_msg* msg, struct auth_data* node)
2738 struct auth_rrset* nsec3;
2739 if(!node) return 1; /* no node, skip this */
2740 nsec3 = az_domain_rrset(node, LDNS_RR_TYPE_NSEC3);
2741 if(!nsec3) return 1; /* if no nsec3 RR, skip it */
2742 if(!msg_add_rrset_ns(z, region, msg, node, nsec3)) return 0;
2746 /** add NSEC3 records to the zone for the nsec3 proof.
2747 * Specify with the flags with parts of the proof are required.
2748 * the ce is the exact matching name (for notype) but also delegation points.
2749 * qname is the one where the nextcloser name can be derived from.
2750 * If NSEC3 is not properly there (in the zone) nothing is added.
2751 * always enabled: include nsec3 proving about the Closest Encloser.
2752 * that is an exact match that should exist for it.
2753 * If that does not exist, a higher exact match + nxproof is enabled
2754 * (for some sort of opt-out empty nonterminal cases).
2755 * nodataproof: search for exact match and include that instead.
2756 * ceproof: include ce proof NSEC3 (omitted for wildcard replies).
2757 * nxproof: include denial of the qname.
2758 * wcproof: include denial of wildcard (wildcard.ce).
2761 az_add_nsec3_proof(struct auth_zone* z, struct regional* region,
2762 struct dns_msg* msg, uint8_t* cenm, size_t cenmlen, uint8_t* qname,
2763 size_t qname_len, int nodataproof, int ceproof, int nxproof,
2767 size_t iter, saltlen;
2769 int no_exact_ce = 0;
2770 struct auth_data* node;
2772 /* find parameters of nsec3 proof */
2773 if(!az_nsec3_param(z, &algo, &iter, &salt, &saltlen))
2774 return 1; /* no nsec3 */
2776 /* see if the node has a hash of itself for the nodata
2777 * proof nsec3, this has to be an exact match nsec3. */
2778 struct auth_data* match;
2779 match = az_nsec3_find_exact(z, qname, qname_len, algo,
2780 iter, salt, saltlen);
2782 if(!az_nsec3_insert(z, region, msg, match))
2784 /* only nodata NSEC3 needed, no CE or others. */
2788 /* find ce that has an NSEC3 */
2790 node = az_nsec3_find_ce(z, &cenm, &cenmlen, &no_exact_ce,
2791 algo, iter, salt, saltlen);
2792 if(no_exact_ce) nxproof = 1;
2793 if(!az_nsec3_insert(z, region, msg, node))
2800 /* create nextcloser domain name */
2801 az_nsec3_get_nextcloser(cenm, qname, qname_len, &nx, &nxlen);
2802 /* find nsec3 that matches or covers it */
2803 node = az_nsec3_find_cover(z, nx, nxlen, algo, iter, salt,
2805 if(!az_nsec3_insert(z, region, msg, node))
2809 /* create wildcard name *.ce */
2810 uint8_t wc[LDNS_MAX_DOMAINLEN];
2812 if(cenmlen+2 > sizeof(wc))
2813 return 0; /* result would be too long */
2814 wc[0] = 1; /* length of wildcard label */
2815 wc[1] = (uint8_t)'*'; /* wildcard label */
2816 memmove(wc+2, cenm, cenmlen);
2818 /* find nsec3 that matches or covers it */
2819 node = az_nsec3_find_cover(z, wc, wclen, algo, iter, salt,
2821 if(!az_nsec3_insert(z, region, msg, node))
2827 /** generate answer for positive answer */
2829 az_generate_positive_answer(struct auth_zone* z, struct regional* region,
2830 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
2832 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2833 /* see if we want additional rrs */
2834 if(rrset->type == LDNS_RR_TYPE_MX) {
2835 if(!az_add_additionals_from(z, region, msg, rrset, 2))
2837 } else if(rrset->type == LDNS_RR_TYPE_SRV) {
2838 if(!az_add_additionals_from(z, region, msg, rrset, 6))
2840 } else if(rrset->type == LDNS_RR_TYPE_NS) {
2841 if(!az_add_additionals_from(z, region, msg, rrset, 0))
2847 /** generate answer for type ANY answer */
2849 az_generate_any_answer(struct auth_zone* z, struct regional* region,
2850 struct dns_msg* msg, struct auth_data* node)
2852 struct auth_rrset* rrset;
2854 /* add a couple (at least one) RRs */
2855 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_SOA)) != NULL) {
2856 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2859 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_MX)) != NULL) {
2860 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2863 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_A)) != NULL) {
2864 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2867 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_AAAA)) != NULL) {
2868 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2871 if(added == 0 && node && node->rrsets) {
2872 if(!msg_add_rrset_an(z, region, msg, node,
2873 node->rrsets)) return 0;
2878 /** follow cname chain and add more data to the answer section */
2880 follow_cname_chain(struct auth_zone* z, uint16_t qtype,
2881 struct regional* region, struct dns_msg* msg,
2882 struct packed_rrset_data* d)
2885 /* see if we can add the target of the CNAME into the answer */
2886 while(maxchain++ < MAX_CNAME_CHAIN) {
2887 struct auth_data* node;
2888 struct auth_rrset* rrset;
2890 /* d has cname rdata */
2891 if(d->count == 0) break; /* no CNAME */
2892 if(d->rr_len[0] < 2+1) break; /* too small */
2893 if((clen=dname_valid(d->rr_data[0]+2, d->rr_len[0]-2))==0)
2894 break; /* malformed */
2895 if(!dname_subdomain_c(d->rr_data[0]+2, z->name))
2896 break; /* target out of zone */
2897 if((node = az_find_name(z, d->rr_data[0]+2, clen))==NULL)
2898 break; /* no such target name */
2899 if((rrset=az_domain_rrset(node, qtype))!=NULL) {
2900 /* done we found the target */
2901 if(!msg_add_rrset_an(z, region, msg, node, rrset))
2905 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_CNAME))==NULL)
2906 break; /* no further CNAME chain, notype */
2907 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2913 /** generate answer for cname answer */
2915 az_generate_cname_answer(struct auth_zone* z, struct query_info* qinfo,
2916 struct regional* region, struct dns_msg* msg,
2917 struct auth_data* node, struct auth_rrset* rrset)
2919 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2920 if(!rrset) return 1;
2921 if(!follow_cname_chain(z, qinfo->qtype, region, msg, rrset->data))
2926 /** generate answer for notype answer */
2928 az_generate_notype_answer(struct auth_zone* z, struct regional* region,
2929 struct dns_msg* msg, struct auth_data* node)
2931 struct auth_rrset* rrset;
2932 if(!az_add_negative_soa(z, region, msg)) return 0;
2933 /* DNSSEC denial NSEC */
2934 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_NSEC))!=NULL) {
2935 if(!msg_add_rrset_ns(z, region, msg, node, rrset)) return 0;
2937 /* DNSSEC denial NSEC3 */
2938 if(!az_add_nsec3_proof(z, region, msg, node->name,
2939 node->namelen, msg->qinfo.qname,
2940 msg->qinfo.qname_len, 1, 1, 0, 0))
2946 /** generate answer for referral answer */
2948 az_generate_referral_answer(struct auth_zone* z, struct regional* region,
2949 struct dns_msg* msg, struct auth_data* ce, struct auth_rrset* rrset)
2951 struct auth_rrset* ds, *nsec;
2952 /* turn off AA flag, referral is nonAA because it leaves the zone */
2954 msg->rep->flags &= ~BIT_AA;
2955 if(!msg_add_rrset_ns(z, region, msg, ce, rrset)) return 0;
2956 /* add DS or deny it */
2957 if((ds=az_domain_rrset(ce, LDNS_RR_TYPE_DS))!=NULL) {
2958 if(!msg_add_rrset_ns(z, region, msg, ce, ds)) return 0;
2961 if((nsec=az_domain_rrset(ce, LDNS_RR_TYPE_NSEC))!=NULL) {
2962 if(!msg_add_rrset_ns(z, region, msg, ce, nsec))
2965 if(!az_add_nsec3_proof(z, region, msg, ce->name,
2966 ce->namelen, msg->qinfo.qname,
2967 msg->qinfo.qname_len, 1, 1, 0, 0))
2971 /* add additional rrs for type NS */
2972 if(!az_add_additionals_from(z, region, msg, rrset, 0)) return 0;
2976 /** generate answer for DNAME answer */
2978 az_generate_dname_answer(struct auth_zone* z, struct query_info* qinfo,
2979 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
2980 struct auth_rrset* rrset)
2983 /* add the DNAME and then a CNAME */
2984 if(!msg_add_rrset_an(z, region, msg, ce, rrset)) return 0;
2985 if(!add_synth_cname(z, qinfo->qname, qinfo->qname_len, region,
2986 msg, ce, rrset)) return 0;
2987 if(FLAGS_GET_RCODE(msg->rep->flags) == LDNS_RCODE_YXDOMAIN)
2989 if(msg->rep->rrset_count == 0 ||
2990 !msg->rep->rrsets[msg->rep->rrset_count-1])
2992 if(!follow_cname_chain(z, qinfo->qtype, region, msg,
2993 (struct packed_rrset_data*)msg->rep->rrsets[
2994 msg->rep->rrset_count-1]->entry.data))
2999 /** generate answer for wildcard answer */
3001 az_generate_wildcard_answer(struct auth_zone* z, struct query_info* qinfo,
3002 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
3003 struct auth_data* wildcard, struct auth_data* node)
3005 struct auth_rrset* rrset, *nsec;
3007 if((rrset=az_domain_rrset(wildcard, qinfo->qtype)) != NULL) {
3008 /* wildcard has type, add it */
3009 if(!msg_add_rrset_an(z, region, msg, wildcard, rrset))
3011 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3012 msg->qinfo.qname_len, 1);
3013 } else if((rrset=az_domain_rrset(wildcard, LDNS_RR_TYPE_CNAME))!=NULL) {
3014 /* wildcard has cname instead, do that */
3015 if(!msg_add_rrset_an(z, region, msg, wildcard, rrset))
3017 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3018 msg->qinfo.qname_len, 1);
3019 if(!follow_cname_chain(z, qinfo->qtype, region, msg,
3022 } else if(qinfo->qtype == LDNS_RR_TYPE_ANY && wildcard->rrsets) {
3023 /* add ANY rrsets from wildcard node */
3024 if(!az_generate_any_answer(z, region, msg, wildcard))
3026 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3027 msg->qinfo.qname_len, 1);
3029 /* wildcard has nodata, notype answer */
3030 /* call other notype routine for dnssec notype denials */
3031 if(!az_generate_notype_answer(z, region, msg, wildcard))
3033 /* because the notype, there is no positive data with an
3034 * RRSIG that indicates the wildcard position. Thus the
3035 * wildcard qname denial needs to have a CE nsec3. */
3039 /* ce and node for dnssec denial of wildcard original name */
3040 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
3041 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
3043 uint8_t* wildup = wildcard->name;
3044 size_t wilduplen= wildcard->namelen;
3045 dname_remove_label(&wildup, &wilduplen);
3046 if(!az_add_nsec3_proof(z, region, msg, wildup,
3047 wilduplen, msg->qinfo.qname,
3048 msg->qinfo.qname_len, 0, insert_ce, 1, 0))
3052 /* fixup name of wildcard from *.zone to qname, use already allocated
3053 * pointer to msg qname */
3054 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3055 msg->qinfo.qname_len, 0);
3059 /** generate answer for nxdomain answer */
3061 az_generate_nxdomain_answer(struct auth_zone* z, struct regional* region,
3062 struct dns_msg* msg, struct auth_data* ce, struct auth_data* node)
3064 struct auth_rrset* nsec;
3065 msg->rep->flags |= LDNS_RCODE_NXDOMAIN;
3066 if(!az_add_negative_soa(z, region, msg)) return 0;
3067 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
3068 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
3069 if(ce && !az_nsec_wildcard_denial(z, region, msg, ce->name,
3070 ce->namelen)) return 0;
3072 if(!az_add_nsec3_proof(z, region, msg, ce->name,
3073 ce->namelen, msg->qinfo.qname,
3074 msg->qinfo.qname_len, 0, 1, 1, 1))
3080 /** Create answers when an exact match exists for the domain name */
3082 az_generate_answer_with_node(struct auth_zone* z, struct query_info* qinfo,
3083 struct regional* region, struct dns_msg* msg, struct auth_data* node)
3085 struct auth_rrset* rrset;
3086 /* positive answer, rrset we are looking for exists */
3087 if((rrset=az_domain_rrset(node, qinfo->qtype)) != NULL) {
3088 return az_generate_positive_answer(z, region, msg, node, rrset);
3091 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_CNAME)) != NULL) {
3092 return az_generate_cname_answer(z, qinfo, region, msg,
3096 if(qinfo->qtype == LDNS_RR_TYPE_ANY) {
3097 return az_generate_any_answer(z, region, msg, node);
3099 /* NOERROR/NODATA (no such type at domain name) */
3100 return az_generate_notype_answer(z, region, msg, node);
3103 /** Generate answer without an existing-node that we can use.
3104 * So it'll be a referral, DNAME or nxdomain */
3106 az_generate_answer_nonexistnode(struct auth_zone* z, struct query_info* qinfo,
3107 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
3108 struct auth_rrset* rrset, struct auth_data* node)
3110 struct auth_data* wildcard;
3112 /* we do not have an exact matching name (that exists) */
3113 /* see if we have a NS or DNAME in the ce */
3114 if(ce && rrset && rrset->type == LDNS_RR_TYPE_NS) {
3115 return az_generate_referral_answer(z, region, msg, ce, rrset);
3117 if(ce && rrset && rrset->type == LDNS_RR_TYPE_DNAME) {
3118 return az_generate_dname_answer(z, qinfo, region, msg, ce,
3121 /* if there is an empty nonterminal, wildcard and nxdomain don't
3122 * happen, it is a notype answer */
3123 if(az_empty_nonterminal(z, qinfo, node)) {
3124 return az_generate_notype_answer(z, region, msg, node);
3126 /* see if we have a wildcard under the ce */
3127 if((wildcard=az_find_wildcard(z, qinfo, ce)) != NULL) {
3128 return az_generate_wildcard_answer(z, qinfo, region, msg,
3129 ce, wildcard, node);
3131 /* generate nxdomain answer */
3132 return az_generate_nxdomain_answer(z, region, msg, ce, node);
3135 /** Lookup answer in a zone. */
3137 auth_zone_generate_answer(struct auth_zone* z, struct query_info* qinfo,
3138 struct regional* region, struct dns_msg** msg, int* fallback)
3140 struct auth_data* node, *ce;
3141 struct auth_rrset* rrset;
3142 int node_exact, node_exists;
3143 /* does the zone want fallback in case of failure? */
3144 *fallback = z->fallback_enabled;
3145 if(!(*msg=msg_create(region, qinfo))) return 0;
3147 /* lookup if there is a matching domain name for the query */
3148 az_find_domain(z, qinfo, &node_exact, &node);
3150 /* see if node exists for generating answers from (i.e. not glue and
3151 * obscured by NS or DNAME or NSEC3-only), and also return the
3152 * closest-encloser from that, closest node that should be used
3153 * to generate answers from that is above the query */
3154 node_exists = az_find_ce(z, qinfo, node, node_exact, &ce, &rrset);
3156 if(verbosity >= VERB_ALGO) {
3157 char zname[256], qname[256], nname[256], cename[256],
3158 tpstr[32], rrstr[32];
3159 sldns_wire2str_dname_buf(qinfo->qname, qinfo->qname_len, qname,
3161 sldns_wire2str_type_buf(qinfo->qtype, tpstr, sizeof(tpstr));
3162 sldns_wire2str_dname_buf(z->name, z->namelen, zname,
3165 sldns_wire2str_dname_buf(node->name, node->namelen,
3166 nname, sizeof(nname));
3167 else snprintf(nname, sizeof(nname), "NULL");
3169 sldns_wire2str_dname_buf(ce->name, ce->namelen,
3170 cename, sizeof(cename));
3171 else snprintf(cename, sizeof(cename), "NULL");
3172 if(rrset) sldns_wire2str_type_buf(rrset->type, rrstr,
3174 else snprintf(rrstr, sizeof(rrstr), "NULL");
3175 log_info("auth_zone %s query %s %s, domain %s %s %s, "
3176 "ce %s, rrset %s", zname, qname, tpstr, nname,
3177 (node_exact?"exact":"notexact"),
3178 (node_exists?"exist":"notexist"), cename, rrstr);
3182 /* the node is fine, generate answer from node */
3183 return az_generate_answer_with_node(z, qinfo, region, *msg,
3186 return az_generate_answer_nonexistnode(z, qinfo, region, *msg,
3190 int auth_zones_lookup(struct auth_zones* az, struct query_info* qinfo,
3191 struct regional* region, struct dns_msg** msg, int* fallback,
3192 uint8_t* dp_nm, size_t dp_nmlen)
3195 struct auth_zone* z;
3196 /* find the zone that should contain the answer. */
3197 lock_rw_rdlock(&az->lock);
3198 z = auth_zone_find(az, dp_nm, dp_nmlen, qinfo->qclass);
3200 lock_rw_unlock(&az->lock);
3201 /* no auth zone, fallback to internet */
3205 lock_rw_rdlock(&z->lock);
3206 lock_rw_unlock(&az->lock);
3208 /* if not for upstream queries, fallback */
3209 if(!z->for_upstream) {
3210 lock_rw_unlock(&z->lock);
3214 if(z->zone_expired) {
3215 *fallback = z->fallback_enabled;
3216 lock_rw_unlock(&z->lock);
3219 /* see what answer that zone would generate */
3220 r = auth_zone_generate_answer(z, qinfo, region, msg, fallback);
3221 lock_rw_unlock(&z->lock);
3225 /** encode auth answer */
3227 auth_answer_encode(struct query_info* qinfo, struct module_env* env,
3228 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
3229 struct regional* temp, struct dns_msg* msg)
3232 udpsize = edns->udp_size;
3233 edns->edns_version = EDNS_ADVERTISED_VERSION;
3234 edns->udp_size = EDNS_ADVERTISED_SIZE;
3235 edns->ext_rcode = 0;
3236 edns->bits &= EDNS_DO;
3238 if(!inplace_cb_reply_local_call(env, qinfo, NULL, msg->rep,
3239 (int)FLAGS_GET_RCODE(msg->rep->flags), edns, repinfo, temp)
3240 || !reply_info_answer_encode(qinfo, msg->rep,
3241 *(uint16_t*)sldns_buffer_begin(buf),
3242 sldns_buffer_read_u16_at(buf, 2),
3243 buf, 0, 0, temp, udpsize, edns,
3244 (int)(edns->bits&EDNS_DO), 0)) {
3245 error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
3246 *(uint16_t*)sldns_buffer_begin(buf),
3247 sldns_buffer_read_u16_at(buf, 2), edns);
3251 /** encode auth error answer */
3253 auth_error_encode(struct query_info* qinfo, struct module_env* env,
3254 struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
3255 struct regional* temp, int rcode)
3257 edns->edns_version = EDNS_ADVERTISED_VERSION;
3258 edns->udp_size = EDNS_ADVERTISED_SIZE;
3259 edns->ext_rcode = 0;
3260 edns->bits &= EDNS_DO;
3262 if(!inplace_cb_reply_local_call(env, qinfo, NULL, NULL,
3263 rcode, edns, repinfo, temp))
3264 edns->opt_list = NULL;
3265 error_encode(buf, rcode|BIT_AA, qinfo,
3266 *(uint16_t*)sldns_buffer_begin(buf),
3267 sldns_buffer_read_u16_at(buf, 2), edns);
3270 int auth_zones_answer(struct auth_zones* az, struct module_env* env,
3271 struct query_info* qinfo, struct edns_data* edns,
3272 struct comm_reply* repinfo, struct sldns_buffer* buf, struct regional* temp)
3274 struct dns_msg* msg = NULL;
3275 struct auth_zone* z;
3279 lock_rw_rdlock(&az->lock);
3280 if(!az->have_downstream) {
3281 /* no downstream auth zones */
3282 lock_rw_unlock(&az->lock);
3285 if(qinfo->qtype == LDNS_RR_TYPE_DS) {
3286 uint8_t* delname = qinfo->qname;
3287 size_t delnamelen = qinfo->qname_len;
3288 dname_remove_label(&delname, &delnamelen);
3289 z = auth_zones_find_zone(az, delname, delnamelen,
3292 z = auth_zones_find_zone(az, qinfo->qname, qinfo->qname_len,
3296 /* no zone above it */
3297 lock_rw_unlock(&az->lock);
3300 lock_rw_rdlock(&z->lock);
3301 lock_rw_unlock(&az->lock);
3302 if(!z->for_downstream) {
3303 lock_rw_unlock(&z->lock);
3306 if(z->zone_expired) {
3307 if(z->fallback_enabled) {
3308 lock_rw_unlock(&z->lock);
3311 lock_rw_unlock(&z->lock);
3312 lock_rw_wrlock(&az->lock);
3313 az->num_query_down++;
3314 lock_rw_unlock(&az->lock);
3315 auth_error_encode(qinfo, env, edns, repinfo, buf, temp,
3316 LDNS_RCODE_SERVFAIL);
3320 /* answer it from zone z */
3321 r = auth_zone_generate_answer(z, qinfo, temp, &msg, &fallback);
3322 lock_rw_unlock(&z->lock);
3323 if(!r && fallback) {
3324 /* fallback to regular answering (recursive) */
3327 lock_rw_wrlock(&az->lock);
3328 az->num_query_down++;
3329 lock_rw_unlock(&az->lock);
3333 auth_error_encode(qinfo, env, edns, repinfo, buf, temp,
3334 LDNS_RCODE_SERVFAIL);
3335 else auth_answer_encode(qinfo, env, edns, repinfo, buf, temp, msg);
3340 int auth_zones_can_fallback(struct auth_zones* az, uint8_t* nm, size_t nmlen,
3344 struct auth_zone* z;
3345 lock_rw_rdlock(&az->lock);
3346 z = auth_zone_find(az, nm, nmlen, dclass);
3348 lock_rw_unlock(&az->lock);
3349 /* no such auth zone, fallback */
3352 lock_rw_rdlock(&z->lock);
3353 lock_rw_unlock(&az->lock);
3354 r = z->fallback_enabled || (!z->for_upstream);
3355 lock_rw_unlock(&z->lock);
3360 auth_zone_parse_notify_serial(sldns_buffer* pkt, uint32_t *serial)
3362 struct query_info q;
3364 memset(&q, 0, sizeof(q));
3365 sldns_buffer_set_position(pkt, 0);
3366 if(!query_info_parse(&q, pkt)) return 0;
3367 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) == 0) return 0;
3368 /* skip name of RR in answer section */
3369 if(sldns_buffer_remaining(pkt) < 1) return 0;
3370 if(pkt_dname_len(pkt) == 0) return 0;
3372 if(sldns_buffer_remaining(pkt) < 10 /* type,class,ttl,rdatalen*/)
3374 if(sldns_buffer_read_u16(pkt) != LDNS_RR_TYPE_SOA) return 0;
3375 sldns_buffer_skip(pkt, 2); /* class */
3376 sldns_buffer_skip(pkt, 4); /* ttl */
3377 rdlen = sldns_buffer_read_u16(pkt); /* rdatalen */
3378 if(sldns_buffer_remaining(pkt) < rdlen) return 0;
3379 if(rdlen < 22) return 0; /* bad soa length */
3380 sldns_buffer_skip(pkt, (ssize_t)(rdlen-20));
3381 *serial = sldns_buffer_read_u32(pkt);
3382 /* return true when has serial in answer section */
3386 /** see if addr appears in the list */
3388 addr_in_list(struct auth_addr* list, struct sockaddr_storage* addr,
3391 struct auth_addr* p;
3392 for(p=list; p; p=p->next) {
3393 if(sockaddr_cmp_addr(addr, addrlen, &p->addr, p->addrlen)==0)
3399 /** check if an address matches a master specification (or one of its
3400 * addresses in the addr list) */
3402 addr_matches_master(struct auth_master* master, struct sockaddr_storage* addr,
3403 socklen_t addrlen, struct auth_master** fromhost)
3405 struct sockaddr_storage a;
3408 if(addr_in_list(master->list, addr, addrlen)) {
3412 /* compare address (but not port number, that is the destination
3413 * port of the master, the port number of the received notify is
3414 * allowed to by any port on that master) */
3415 if(extstrtoaddr(master->host, &a, &alen) &&
3416 sockaddr_cmp_addr(addr, addrlen, &a, alen)==0) {
3420 /* prefixes, addr/len, like 10.0.0.0/8 */
3421 /* not http and has a / and there is one / */
3422 if(master->allow_notify && !master->http &&
3423 strchr(master->host, '/') != NULL &&
3424 strchr(master->host, '/') == strrchr(master->host, '/') &&
3425 netblockstrtoaddr(master->host, UNBOUND_DNS_PORT, &a, &alen,
3426 &net) && alen == addrlen) {
3427 if(addr_in_common(addr, (addr_is_ip6(addr, addrlen)?128:32),
3428 &a, net, alen) >= net) {
3429 *fromhost = NULL; /* prefix does not have destination
3430 to send the probe or transfer with */
3431 return 1; /* matches the netblock */
3437 /** check access list for notifies */
3439 az_xfr_allowed_notify(struct auth_xfer* xfr, struct sockaddr_storage* addr,
3440 socklen_t addrlen, struct auth_master** fromhost)
3442 struct auth_master* p;
3443 for(p=xfr->allow_notify_list; p; p=p->next) {
3444 if(addr_matches_master(p, addr, addrlen, fromhost)) {
3451 /** see if the serial means the zone has to be updated, i.e. the serial
3452 * is newer than the zone serial, or we have no zone */
3454 xfr_serial_means_update(struct auth_xfer* xfr, uint32_t serial)
3457 return 1; /* no zone, anything is better */
3458 if(xfr->zone_expired)
3459 return 1; /* expired, the sent serial is better than expired
3461 if(compare_serial(xfr->serial, serial) < 0)
3462 return 1; /* our serial is smaller than the sent serial,
3463 the data is newer, fetch it */
3467 /** note notify serial, updates the notify information in the xfr struct */
3469 xfr_note_notify_serial(struct auth_xfer* xfr, int has_serial, uint32_t serial)
3471 if(xfr->notify_received && xfr->notify_has_serial && has_serial) {
3472 /* see if this serial is newer */
3473 if(compare_serial(xfr->notify_serial, serial) < 0)
3474 xfr->notify_serial = serial;
3475 } else if(xfr->notify_received && xfr->notify_has_serial &&
3477 /* remove serial, we have notify without serial */
3478 xfr->notify_has_serial = 0;
3479 xfr->notify_serial = 0;
3480 } else if(xfr->notify_received && !xfr->notify_has_serial) {
3481 /* we already have notify without serial, keep it
3482 * that way; no serial check when current operation
3485 xfr->notify_received = 1;
3486 xfr->notify_has_serial = has_serial;
3487 xfr->notify_serial = serial;
3491 /** process a notify serial, start new probe or note serial. xfr is locked */
3493 xfr_process_notify(struct auth_xfer* xfr, struct module_env* env,
3494 int has_serial, uint32_t serial, struct auth_master* fromhost)
3496 /* if the serial of notify is older than we have, don't fetch
3497 * a zone, we already have it */
3498 if(has_serial && !xfr_serial_means_update(xfr, serial)) {
3499 lock_basic_unlock(&xfr->lock);
3502 /* start new probe with this addr src, or note serial */
3503 if(!xfr_start_probe(xfr, env, fromhost)) {
3504 /* not started because already in progress, note the serial */
3505 xfr_note_notify_serial(xfr, has_serial, serial);
3506 lock_basic_unlock(&xfr->lock);
3508 /* successful end of start_probe unlocked xfr->lock */
3511 int auth_zones_notify(struct auth_zones* az, struct module_env* env,
3512 uint8_t* nm, size_t nmlen, uint16_t dclass,
3513 struct sockaddr_storage* addr, socklen_t addrlen, int has_serial,
3514 uint32_t serial, int* refused)
3516 struct auth_xfer* xfr;
3517 struct auth_master* fromhost = NULL;
3518 /* see which zone this is */
3519 lock_rw_rdlock(&az->lock);
3520 xfr = auth_xfer_find(az, nm, nmlen, dclass);
3522 lock_rw_unlock(&az->lock);
3523 /* no such zone, refuse the notify */
3527 lock_basic_lock(&xfr->lock);
3528 lock_rw_unlock(&az->lock);
3530 /* check access list for notifies */
3531 if(!az_xfr_allowed_notify(xfr, addr, addrlen, &fromhost)) {
3532 lock_basic_unlock(&xfr->lock);
3533 /* notify not allowed, refuse the notify */
3538 /* process the notify */
3539 xfr_process_notify(xfr, env, has_serial, serial, fromhost);
3543 int auth_zones_startprobesequence(struct auth_zones* az,
3544 struct module_env* env, uint8_t* nm, size_t nmlen, uint16_t dclass)
3546 struct auth_xfer* xfr;
3547 lock_rw_rdlock(&az->lock);
3548 xfr = auth_xfer_find(az, nm, nmlen, dclass);
3550 lock_rw_unlock(&az->lock);
3553 lock_basic_lock(&xfr->lock);
3554 lock_rw_unlock(&az->lock);
3556 xfr_process_notify(xfr, env, 0, 0, NULL);
3560 /** set a zone expired */
3562 auth_xfer_set_expired(struct auth_xfer* xfr, struct module_env* env,
3565 struct auth_zone* z;
3568 lock_basic_lock(&xfr->lock);
3569 xfr->zone_expired = expired;
3570 lock_basic_unlock(&xfr->lock);
3572 /* find auth_zone */
3573 lock_rw_rdlock(&env->auth_zones->lock);
3574 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
3577 lock_rw_unlock(&env->auth_zones->lock);
3580 lock_rw_wrlock(&z->lock);
3581 lock_rw_unlock(&env->auth_zones->lock);
3583 /* expire auth_zone */
3584 z->zone_expired = expired;
3585 lock_rw_unlock(&z->lock);
3588 /** find master (from notify or probe) in list of masters */
3589 static struct auth_master*
3590 find_master_by_host(struct auth_master* list, char* host)
3592 struct auth_master* p;
3593 for(p=list; p; p=p->next) {
3594 if(strcmp(p->host, host) == 0)
3600 /** delete the looked up auth_addrs for all the masters in the list */
3602 xfr_masterlist_free_addrs(struct auth_master* list)
3604 struct auth_master* m;
3605 for(m=list; m; m=m->next) {
3607 auth_free_master_addrs(m->list);
3613 /** copy a list of auth_addrs */
3614 static struct auth_addr*
3615 auth_addr_list_copy(struct auth_addr* source)
3617 struct auth_addr* list = NULL, *last = NULL;
3618 struct auth_addr* p;
3619 for(p=source; p; p=p->next) {
3620 struct auth_addr* a = (struct auth_addr*)memdup(p, sizeof(*p));
3622 log_err("malloc failure");
3623 auth_free_master_addrs(list);
3627 if(last) last->next = a;
3634 /** copy a master to a new structure, NULL on alloc failure */
3635 static struct auth_master*
3636 auth_master_copy(struct auth_master* o)
3638 struct auth_master* m;
3640 m = (struct auth_master*)memdup(o, sizeof(*o));
3642 log_err("malloc failure");
3647 m->host = strdup(m->host);
3650 log_err("malloc failure");
3655 m->file = strdup(m->file);
3659 log_err("malloc failure");
3664 m->list = auth_addr_list_copy(m->list);
3675 /** copy the master addresses from the task_probe lookups to the allow_notify
3676 * list of masters */
3678 probe_copy_masters_for_allow_notify(struct auth_xfer* xfr)
3680 struct auth_master* list = NULL, *last = NULL;
3681 struct auth_master* p;
3682 /* build up new list with copies */
3683 for(p = xfr->task_probe->masters; p; p=p->next) {
3684 struct auth_master* m = auth_master_copy(p);
3686 auth_free_masters(list);
3687 /* failed because of malloc failure, use old list */
3691 if(last) last->next = m;
3695 /* success, replace list */
3696 auth_free_masters(xfr->allow_notify_list);
3697 xfr->allow_notify_list = list;
3700 /** start the lookups for task_transfer */
3702 xfr_transfer_start_lookups(struct auth_xfer* xfr)
3704 /* delete all the looked up addresses in the list */
3705 xfr->task_transfer->scan_addr = NULL;
3706 xfr_masterlist_free_addrs(xfr->task_transfer->masters);
3708 /* start lookup at the first master */
3709 xfr->task_transfer->lookup_target = xfr->task_transfer->masters;
3710 xfr->task_transfer->lookup_aaaa = 0;
3713 /** move to the next lookup of hostname for task_transfer */
3715 xfr_transfer_move_to_next_lookup(struct auth_xfer* xfr, struct module_env* env)
3717 if(!xfr->task_transfer->lookup_target)
3718 return; /* already at end of list */
3719 if(!xfr->task_transfer->lookup_aaaa && env->cfg->do_ip6) {
3720 /* move to lookup AAAA */
3721 xfr->task_transfer->lookup_aaaa = 1;
3724 xfr->task_transfer->lookup_target =
3725 xfr->task_transfer->lookup_target->next;
3726 xfr->task_transfer->lookup_aaaa = 0;
3727 if(!env->cfg->do_ip4 && xfr->task_transfer->lookup_target!=NULL)
3728 xfr->task_transfer->lookup_aaaa = 1;
3731 /** start the lookups for task_probe */
3733 xfr_probe_start_lookups(struct auth_xfer* xfr)
3735 /* delete all the looked up addresses in the list */
3736 xfr->task_probe->scan_addr = NULL;
3737 xfr_masterlist_free_addrs(xfr->task_probe->masters);
3739 /* start lookup at the first master */
3740 xfr->task_probe->lookup_target = xfr->task_probe->masters;
3741 xfr->task_probe->lookup_aaaa = 0;
3744 /** move to the next lookup of hostname for task_probe */
3746 xfr_probe_move_to_next_lookup(struct auth_xfer* xfr, struct module_env* env)
3748 if(!xfr->task_probe->lookup_target)
3749 return; /* already at end of list */
3750 if(!xfr->task_probe->lookup_aaaa && env->cfg->do_ip6) {
3751 /* move to lookup AAAA */
3752 xfr->task_probe->lookup_aaaa = 1;
3755 xfr->task_probe->lookup_target = xfr->task_probe->lookup_target->next;
3756 xfr->task_probe->lookup_aaaa = 0;
3757 if(!env->cfg->do_ip4 && xfr->task_probe->lookup_target!=NULL)
3758 xfr->task_probe->lookup_aaaa = 1;
3761 /** start the iteration of the task_transfer list of masters */
3763 xfr_transfer_start_list(struct auth_xfer* xfr, struct auth_master* spec)
3766 xfr->task_transfer->scan_specific = find_master_by_host(
3767 xfr->task_transfer->masters, spec->host);
3768 if(xfr->task_transfer->scan_specific) {
3769 xfr->task_transfer->scan_target = NULL;
3770 xfr->task_transfer->scan_addr = NULL;
3771 if(xfr->task_transfer->scan_specific->list)
3772 xfr->task_transfer->scan_addr =
3773 xfr->task_transfer->scan_specific->list;
3777 /* no specific (notified) host to scan */
3778 xfr->task_transfer->scan_specific = NULL;
3779 xfr->task_transfer->scan_addr = NULL;
3780 /* pick up first scan target */
3781 xfr->task_transfer->scan_target = xfr->task_transfer->masters;
3782 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3784 xfr->task_transfer->scan_addr =
3785 xfr->task_transfer->scan_target->list;
3788 /** start the iteration of the task_probe list of masters */
3790 xfr_probe_start_list(struct auth_xfer* xfr, struct auth_master* spec)
3793 xfr->task_probe->scan_specific = find_master_by_host(
3794 xfr->task_probe->masters, spec->host);
3795 if(xfr->task_probe->scan_specific) {
3796 xfr->task_probe->scan_target = NULL;
3797 xfr->task_probe->scan_addr = NULL;
3798 if(xfr->task_probe->scan_specific->list)
3799 xfr->task_probe->scan_addr =
3800 xfr->task_probe->scan_specific->list;
3804 /* no specific (notified) host to scan */
3805 xfr->task_probe->scan_specific = NULL;
3806 xfr->task_probe->scan_addr = NULL;
3807 /* pick up first scan target */
3808 xfr->task_probe->scan_target = xfr->task_probe->masters;
3809 if(xfr->task_probe->scan_target && xfr->task_probe->scan_target->list)
3810 xfr->task_probe->scan_addr =
3811 xfr->task_probe->scan_target->list;
3814 /** pick up the master that is being scanned right now, task_transfer */
3815 static struct auth_master*
3816 xfr_transfer_current_master(struct auth_xfer* xfr)
3818 if(xfr->task_transfer->scan_specific)
3819 return xfr->task_transfer->scan_specific;
3820 return xfr->task_transfer->scan_target;
3823 /** pick up the master that is being scanned right now, task_probe */
3824 static struct auth_master*
3825 xfr_probe_current_master(struct auth_xfer* xfr)
3827 if(xfr->task_probe->scan_specific)
3828 return xfr->task_probe->scan_specific;
3829 return xfr->task_probe->scan_target;
3832 /** true if at end of list, task_transfer */
3834 xfr_transfer_end_of_list(struct auth_xfer* xfr)
3836 return !xfr->task_transfer->scan_specific &&
3837 !xfr->task_transfer->scan_target;
3840 /** true if at end of list, task_probe */
3842 xfr_probe_end_of_list(struct auth_xfer* xfr)
3844 return !xfr->task_probe->scan_specific && !xfr->task_probe->scan_target;
3847 /** move to next master in list, task_transfer */
3849 xfr_transfer_nextmaster(struct auth_xfer* xfr)
3851 if(!xfr->task_transfer->scan_specific &&
3852 !xfr->task_transfer->scan_target)
3854 if(xfr->task_transfer->scan_addr) {
3855 xfr->task_transfer->scan_addr =
3856 xfr->task_transfer->scan_addr->next;
3857 if(xfr->task_transfer->scan_addr)
3860 if(xfr->task_transfer->scan_specific) {
3861 xfr->task_transfer->scan_specific = NULL;
3862 xfr->task_transfer->scan_target = xfr->task_transfer->masters;
3863 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3865 xfr->task_transfer->scan_addr =
3866 xfr->task_transfer->scan_target->list;
3869 if(!xfr->task_transfer->scan_target)
3871 xfr->task_transfer->scan_target = xfr->task_transfer->scan_target->next;
3872 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3874 xfr->task_transfer->scan_addr =
3875 xfr->task_transfer->scan_target->list;
3879 /** move to next master in list, task_probe */
3881 xfr_probe_nextmaster(struct auth_xfer* xfr)
3883 if(!xfr->task_probe->scan_specific && !xfr->task_probe->scan_target)
3885 if(xfr->task_probe->scan_addr) {
3886 xfr->task_probe->scan_addr = xfr->task_probe->scan_addr->next;
3887 if(xfr->task_probe->scan_addr)
3890 if(xfr->task_probe->scan_specific) {
3891 xfr->task_probe->scan_specific = NULL;
3892 xfr->task_probe->scan_target = xfr->task_probe->masters;
3893 if(xfr->task_probe->scan_target && xfr->task_probe->
3895 xfr->task_probe->scan_addr =
3896 xfr->task_probe->scan_target->list;
3899 if(!xfr->task_probe->scan_target)
3901 xfr->task_probe->scan_target = xfr->task_probe->scan_target->next;
3902 if(xfr->task_probe->scan_target && xfr->task_probe->
3904 xfr->task_probe->scan_addr =
3905 xfr->task_probe->scan_target->list;
3909 /** create SOA probe packet for xfr */
3911 xfr_create_soa_probe_packet(struct auth_xfer* xfr, sldns_buffer* buf,
3914 struct query_info qinfo;
3916 memset(&qinfo, 0, sizeof(qinfo));
3917 qinfo.qname = xfr->name;
3918 qinfo.qname_len = xfr->namelen;
3919 qinfo.qtype = LDNS_RR_TYPE_SOA;
3920 qinfo.qclass = xfr->dclass;
3921 qinfo_query_encode(buf, &qinfo);
3922 sldns_buffer_write_u16_at(buf, 0, id);
3925 /** create IXFR/AXFR packet for xfr */
3927 xfr_create_ixfr_packet(struct auth_xfer* xfr, sldns_buffer* buf, uint16_t id,
3928 struct auth_master* master)
3930 struct query_info qinfo;
3933 have_zone = xfr->have_zone;
3934 serial = xfr->serial;
3936 memset(&qinfo, 0, sizeof(qinfo));
3937 qinfo.qname = xfr->name;
3938 qinfo.qname_len = xfr->namelen;
3939 xfr->task_transfer->got_xfr_serial = 0;
3940 xfr->task_transfer->rr_scan_num = 0;
3941 xfr->task_transfer->incoming_xfr_serial = 0;
3942 xfr->task_transfer->on_ixfr_is_axfr = 0;
3943 xfr->task_transfer->on_ixfr = 1;
3944 qinfo.qtype = LDNS_RR_TYPE_IXFR;
3945 if(!have_zone || xfr->task_transfer->ixfr_fail || !master->ixfr) {
3946 qinfo.qtype = LDNS_RR_TYPE_AXFR;
3947 xfr->task_transfer->ixfr_fail = 0;
3948 xfr->task_transfer->on_ixfr = 0;
3951 qinfo.qclass = xfr->dclass;
3952 qinfo_query_encode(buf, &qinfo);
3953 sldns_buffer_write_u16_at(buf, 0, id);
3955 /* append serial for IXFR */
3956 if(qinfo.qtype == LDNS_RR_TYPE_IXFR) {
3957 size_t end = sldns_buffer_limit(buf);
3958 sldns_buffer_clear(buf);
3959 sldns_buffer_set_position(buf, end);
3960 /* auth section count 1 */
3961 sldns_buffer_write_u16_at(buf, LDNS_NSCOUNT_OFF, 1);
3963 sldns_buffer_write_u8(buf, 0xC0); /* compressed ptr to qname */
3964 sldns_buffer_write_u8(buf, 0x0C);
3965 sldns_buffer_write_u16(buf, LDNS_RR_TYPE_SOA);
3966 sldns_buffer_write_u16(buf, qinfo.qclass);
3967 sldns_buffer_write_u32(buf, 0); /* ttl */
3968 sldns_buffer_write_u16(buf, 22); /* rdata length */
3969 sldns_buffer_write_u8(buf, 0); /* . */
3970 sldns_buffer_write_u8(buf, 0); /* . */
3971 sldns_buffer_write_u32(buf, serial); /* serial */
3972 sldns_buffer_write_u32(buf, 0); /* refresh */
3973 sldns_buffer_write_u32(buf, 0); /* retry */
3974 sldns_buffer_write_u32(buf, 0); /* expire */
3975 sldns_buffer_write_u32(buf, 0); /* minimum */
3976 sldns_buffer_flip(buf);
3980 /** check if returned packet is OK */
3982 check_packet_ok(sldns_buffer* pkt, uint16_t qtype, struct auth_xfer* xfr,
3985 /* parse to see if packet worked, valid reply */
3987 /* check serial number of SOA */
3988 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE)
3992 if(LDNS_ID_WIRE(sldns_buffer_begin(pkt)) != xfr->task_probe->id)
3995 /* check flag bits and rcode */
3996 if(!LDNS_QR_WIRE(sldns_buffer_begin(pkt)))
3998 if(LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_QUERY)
4000 if(LDNS_RCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_RCODE_NOERROR)
4004 if(LDNS_QDCOUNT(sldns_buffer_begin(pkt)) != 1)
4006 sldns_buffer_skip(pkt, LDNS_HEADER_SIZE);
4007 if(sldns_buffer_remaining(pkt) < xfr->namelen)
4009 if(query_dname_compare(sldns_buffer_current(pkt), xfr->name) != 0)
4011 sldns_buffer_skip(pkt, (ssize_t)xfr->namelen);
4013 /* check qtype, qclass */
4014 if(sldns_buffer_remaining(pkt) < 4)
4016 if(sldns_buffer_read_u16(pkt) != qtype)
4018 if(sldns_buffer_read_u16(pkt) != xfr->dclass)
4023 /* read serial number, from answer section SOA */
4024 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) == 0)
4026 /* read from first record SOA record */
4027 if(sldns_buffer_remaining(pkt) < 1)
4029 if(dname_pkt_compare(pkt, sldns_buffer_current(pkt),
4032 if(!pkt_dname_len(pkt))
4034 /* type, class, ttl, rdatalen */
4035 if(sldns_buffer_remaining(pkt) < 4+4+2)
4037 if(sldns_buffer_read_u16(pkt) != qtype)
4039 if(sldns_buffer_read_u16(pkt) != xfr->dclass)
4041 sldns_buffer_skip(pkt, 4); /* ttl */
4042 rdlen = sldns_buffer_read_u16(pkt);
4043 if(sldns_buffer_remaining(pkt) < rdlen)
4045 if(sldns_buffer_remaining(pkt) < 1)
4047 if(!pkt_dname_len(pkt)) /* soa name */
4049 if(sldns_buffer_remaining(pkt) < 1)
4051 if(!pkt_dname_len(pkt)) /* soa name */
4053 if(sldns_buffer_remaining(pkt) < 20)
4055 *serial = sldns_buffer_read_u32(pkt);
4060 /** read one line from chunks into buffer at current position */
4062 chunkline_get_line(struct auth_chunk** chunk, size_t* chunk_pos,
4067 /* more text in this chunk? */
4068 if(*chunk_pos < (*chunk)->len) {
4070 while(*chunk_pos < (*chunk)->len) {
4071 char c = (char)((*chunk)->data[*chunk_pos]);
4073 if(sldns_buffer_remaining(buf) < 2) {
4074 /* buffer too short */
4075 verbose(VERB_ALGO, "http chunkline, "
4079 sldns_buffer_write_u8(buf, (uint8_t)c);
4086 /* move to next chunk */
4087 *chunk = (*chunk)->next;
4091 if(readsome) return 1;
4095 /** count number of open and closed parenthesis in a chunkline */
4097 chunkline_count_parens(sldns_buffer* buf, size_t start)
4099 size_t end = sldns_buffer_position(buf);
4102 int squote = 0, dquote = 0;
4103 for(i=start; i<end; i++) {
4104 char c = (char)sldns_buffer_read_u8_at(buf, i);
4105 if(squote && c != '\'') continue;
4106 if(dquote && c != '"') continue;
4108 dquote = !dquote; /* skip quoted part */
4110 squote = !squote; /* skip quoted part */
4116 /* rest is a comment */
4123 /** remove trailing ;... comment from a line in the chunkline buffer */
4125 chunkline_remove_trailcomment(sldns_buffer* buf, size_t start)
4127 size_t end = sldns_buffer_position(buf);
4129 int squote = 0, dquote = 0;
4130 for(i=start; i<end; i++) {
4131 char c = (char)sldns_buffer_read_u8_at(buf, i);
4132 if(squote && c != '\'') continue;
4133 if(dquote && c != '"') continue;
4135 dquote = !dquote; /* skip quoted part */
4137 squote = !squote; /* skip quoted part */
4139 /* rest is a comment */
4140 sldns_buffer_set_position(buf, i);
4144 /* nothing to remove */
4147 /** see if a chunkline is a comment line (or empty line) */
4149 chunkline_is_comment_line_or_empty(sldns_buffer* buf)
4151 size_t i, end = sldns_buffer_limit(buf);
4152 for(i=0; i<end; i++) {
4153 char c = (char)sldns_buffer_read_u8_at(buf, i);
4155 return 1; /* comment */
4156 else if(c != ' ' && c != '\t' && c != '\r' && c != '\n')
4157 return 0; /* not a comment */
4159 return 1; /* empty */
4162 /** find a line with ( ) collated */
4164 chunkline_get_line_collated(struct auth_chunk** chunk, size_t* chunk_pos,
4169 sldns_buffer_clear(buf);
4170 pos = sldns_buffer_position(buf);
4171 if(!chunkline_get_line(chunk, chunk_pos, buf)) {
4172 if(sldns_buffer_position(buf) < sldns_buffer_limit(buf))
4173 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4174 else sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf)-1, 0);
4175 sldns_buffer_flip(buf);
4178 parens += chunkline_count_parens(buf, pos);
4180 chunkline_remove_trailcomment(buf, pos);
4181 pos = sldns_buffer_position(buf);
4182 if(!chunkline_get_line(chunk, chunk_pos, buf)) {
4183 if(sldns_buffer_position(buf) < sldns_buffer_limit(buf))
4184 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4185 else sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf)-1, 0);
4186 sldns_buffer_flip(buf);
4189 parens += chunkline_count_parens(buf, pos);
4192 if(sldns_buffer_remaining(buf) < 1) {
4193 verbose(VERB_ALGO, "http chunkline: "
4197 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4198 sldns_buffer_flip(buf);
4202 /** process $ORIGIN for http */
4204 http_parse_origin(sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4206 char* line = (char*)sldns_buffer_begin(buf);
4207 if(strncmp(line, "$ORIGIN", 7) == 0 &&
4208 isspace((unsigned char)line[7])) {
4210 pstate->origin_len = sizeof(pstate->origin);
4211 s = sldns_str2wire_dname_buf(sldns_strip_ws(line+8),
4212 pstate->origin, &pstate->origin_len);
4213 if(s) pstate->origin_len = 0;
4219 /** process $TTL for http */
4221 http_parse_ttl(sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4223 char* line = (char*)sldns_buffer_begin(buf);
4224 if(strncmp(line, "$TTL", 4) == 0 &&
4225 isspace((unsigned char)line[4])) {
4226 const char* end = NULL;
4227 pstate->default_ttl = sldns_str2period(
4228 sldns_strip_ws(line+5), &end);
4234 /** find noncomment RR line in chunks, collates lines if ( ) format */
4236 chunkline_non_comment_RR(struct auth_chunk** chunk, size_t* chunk_pos,
4237 sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4239 while(chunkline_get_line_collated(chunk, chunk_pos, buf)) {
4240 if(chunkline_is_comment_line_or_empty(buf)) {
4241 /* a comment, go to next line */
4244 if(http_parse_origin(buf, pstate)) {
4245 continue; /* $ORIGIN has been handled */
4247 if(http_parse_ttl(buf, pstate)) {
4248 continue; /* $TTL has been handled */
4252 /* no noncomments, fail */
4256 /** check syntax of chunklist zonefile, parse first RR, return false on
4257 * failure and return a string in the scratch buffer (first RR string)
4260 http_zonefile_syntax_check(struct auth_xfer* xfr, sldns_buffer* buf)
4262 uint8_t rr[LDNS_RR_BUF_SIZE];
4263 size_t rr_len, dname_len = 0;
4264 struct sldns_file_parse_state pstate;
4265 struct auth_chunk* chunk;
4268 memset(&pstate, 0, sizeof(pstate));
4269 pstate.default_ttl = 3600;
4270 if(xfr->namelen < sizeof(pstate.origin)) {
4271 pstate.origin_len = xfr->namelen;
4272 memmove(pstate.origin, xfr->name, xfr->namelen);
4274 chunk = xfr->task_transfer->chunks_first;
4276 if(!chunkline_non_comment_RR(&chunk, &chunk_pos, buf, &pstate)) {
4279 rr_len = sizeof(rr);
4280 e=sldns_str2wire_rr_buf((char*)sldns_buffer_begin(buf), rr, &rr_len,
4281 &dname_len, pstate.default_ttl,
4282 pstate.origin_len?pstate.origin:NULL, pstate.origin_len,
4283 pstate.prev_rr_len?pstate.prev_rr:NULL, pstate.prev_rr_len);
4285 log_err("parse failure on first RR[%d]: %s",
4286 LDNS_WIREPARSE_OFFSET(e),
4287 sldns_get_errorstr_parse(LDNS_WIREPARSE_ERROR(e)));
4290 /* check that class is correct */
4291 if(sldns_wirerr_get_class(rr, rr_len, dname_len) != xfr->dclass) {
4292 log_err("parse failure: first record in downloaded zonefile "
4293 "from wrong RR class");
4299 /** sum sizes of chunklist */
4301 chunklist_sum(struct auth_chunk* list)
4303 struct auth_chunk* p;
4305 for(p=list; p; p=p->next) {
4311 /** remove newlines from collated line */
4313 chunkline_newline_removal(sldns_buffer* buf)
4315 size_t i, end=sldns_buffer_limit(buf);
4316 for(i=0; i<end; i++) {
4317 char c = (char)sldns_buffer_read_u8_at(buf, i);
4318 if(c == '\n' && i==end-1) {
4319 sldns_buffer_write_u8_at(buf, i, 0);
4320 sldns_buffer_set_limit(buf, end-1);
4324 sldns_buffer_write_u8_at(buf, i, (uint8_t)' ');
4328 /** for http download, parse and add RR to zone */
4330 http_parse_add_rr(struct auth_xfer* xfr, struct auth_zone* z,
4331 sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4333 uint8_t rr[LDNS_RR_BUF_SIZE];
4334 size_t rr_len, dname_len = 0;
4336 char* line = (char*)sldns_buffer_begin(buf);
4337 rr_len = sizeof(rr);
4338 e = sldns_str2wire_rr_buf(line, rr, &rr_len, &dname_len,
4339 pstate->default_ttl,
4340 pstate->origin_len?pstate->origin:NULL, pstate->origin_len,
4341 pstate->prev_rr_len?pstate->prev_rr:NULL, pstate->prev_rr_len);
4343 log_err("%s/%s parse failure RR[%d]: %s in '%s'",
4344 xfr->task_transfer->master->host,
4345 xfr->task_transfer->master->file,
4346 LDNS_WIREPARSE_OFFSET(e),
4347 sldns_get_errorstr_parse(LDNS_WIREPARSE_ERROR(e)),
4352 return 1; /* empty line or so */
4355 if(dname_len < sizeof(pstate->prev_rr)) {
4356 memmove(pstate->prev_rr, rr, dname_len);
4357 pstate->prev_rr_len = dname_len;
4360 return az_insert_rr(z, rr, rr_len, dname_len, NULL);
4363 /** RR list iterator, returns RRs from answer section one by one from the
4364 * dns packets in the chunklist */
4366 chunk_rrlist_start(struct auth_xfer* xfr, struct auth_chunk** rr_chunk,
4367 int* rr_num, size_t* rr_pos)
4369 *rr_chunk = xfr->task_transfer->chunks_first;
4374 /** RR list iterator, see if we are at the end of the list */
4376 chunk_rrlist_end(struct auth_chunk* rr_chunk, int rr_num)
4379 if(rr_chunk->len < LDNS_HEADER_SIZE)
4381 if(rr_num < (int)LDNS_ANCOUNT(rr_chunk->data))
4383 /* no more RRs in this chunk */
4384 /* continue with next chunk, see if it has RRs */
4385 rr_chunk = rr_chunk->next;
4391 /** RR list iterator, move to next RR */
4393 chunk_rrlist_gonext(struct auth_chunk** rr_chunk, int* rr_num,
4394 size_t* rr_pos, size_t rr_nextpos)
4396 /* already at end of chunks? */
4399 /* move within this chunk */
4400 if((*rr_chunk)->len >= LDNS_HEADER_SIZE &&
4401 (*rr_num)+1 < (int)LDNS_ANCOUNT((*rr_chunk)->data)) {
4403 *rr_pos = rr_nextpos;
4406 /* no more RRs in this chunk */
4407 /* continue with next chunk, see if it has RRs */
4409 *rr_chunk = (*rr_chunk)->next;
4413 if((*rr_chunk)->len >= LDNS_HEADER_SIZE &&
4414 LDNS_ANCOUNT((*rr_chunk)->data) > 0) {
4417 *rr_chunk = (*rr_chunk)->next;
4421 /** RR iterator, get current RR information, false on parse error */
4423 chunk_rrlist_get_current(struct auth_chunk* rr_chunk, int rr_num,
4424 size_t rr_pos, uint8_t** rr_dname, uint16_t* rr_type,
4425 uint16_t* rr_class, uint32_t* rr_ttl, uint16_t* rr_rdlen,
4426 uint8_t** rr_rdata, size_t* rr_nextpos)
4429 /* integrity checks on position */
4430 if(!rr_chunk) return 0;
4431 if(rr_chunk->len < LDNS_HEADER_SIZE) return 0;
4432 if(rr_num >= (int)LDNS_ANCOUNT(rr_chunk->data)) return 0;
4433 if(rr_pos >= rr_chunk->len) return 0;
4435 /* fetch rr information */
4436 sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
4439 /* skip question section */
4440 sldns_buffer_set_position(&pkt, LDNS_HEADER_SIZE);
4441 for(i=0; i<LDNS_QDCOUNT(rr_chunk->data); i++) {
4442 if(pkt_dname_len(&pkt) == 0) return 0;
4443 if(sldns_buffer_remaining(&pkt) < 4) return 0;
4444 sldns_buffer_skip(&pkt, 4); /* type and class */
4447 sldns_buffer_set_position(&pkt, rr_pos);
4449 *rr_dname = sldns_buffer_current(&pkt);
4450 if(pkt_dname_len(&pkt) == 0) return 0;
4451 if(sldns_buffer_remaining(&pkt) < 10) return 0;
4452 *rr_type = sldns_buffer_read_u16(&pkt);
4453 *rr_class = sldns_buffer_read_u16(&pkt);
4454 *rr_ttl = sldns_buffer_read_u32(&pkt);
4455 *rr_rdlen = sldns_buffer_read_u16(&pkt);
4456 if(sldns_buffer_remaining(&pkt) < (*rr_rdlen)) return 0;
4457 *rr_rdata = sldns_buffer_current(&pkt);
4458 sldns_buffer_skip(&pkt, (ssize_t)(*rr_rdlen));
4459 *rr_nextpos = sldns_buffer_position(&pkt);
4463 /** print log message where we are in parsing the zone transfer */
4465 log_rrlist_position(const char* label, struct auth_chunk* rr_chunk,
4466 uint8_t* rr_dname, uint16_t rr_type, size_t rr_counter)
4473 sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
4474 sldns_buffer_set_position(&pkt, (size_t)(rr_dname -
4475 sldns_buffer_begin(&pkt)));
4476 if((dlen=pkt_dname_len(&pkt)) == 0) return;
4477 if(dlen >= sizeof(buf)) return;
4478 dname_pkt_copy(&pkt, buf, rr_dname);
4479 dname_str(buf, str);
4480 (void)sldns_wire2str_type_buf(rr_type, typestr, sizeof(typestr));
4481 verbose(VERB_ALGO, "%s at[%d] %s %s", label, (int)rr_counter,
4485 /** check that start serial is OK for ixfr. we are at rr_counter == 0,
4486 * and we are going to check rr_counter == 1 (has to be type SOA) serial */
4488 ixfr_start_serial(struct auth_chunk* rr_chunk, int rr_num, size_t rr_pos,
4489 uint8_t* rr_dname, uint16_t rr_type, uint16_t rr_class,
4490 uint32_t rr_ttl, uint16_t rr_rdlen, uint8_t* rr_rdata,
4491 size_t rr_nextpos, uint32_t transfer_serial, uint32_t xfr_serial)
4493 uint32_t startserial;
4494 /* move forward on RR */
4495 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4496 if(chunk_rrlist_end(rr_chunk, rr_num)) {
4498 verbose(VERB_OPS, "IXFR has no second SOA record");
4501 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4502 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4503 &rr_rdata, &rr_nextpos)) {
4504 verbose(VERB_OPS, "IXFR cannot parse second SOA record");
4505 /* failed to parse RR */
4508 if(rr_type != LDNS_RR_TYPE_SOA) {
4509 verbose(VERB_OPS, "IXFR second record is not type SOA");
4513 verbose(VERB_OPS, "IXFR, second SOA has short rdlength");
4514 return 0; /* bad SOA rdlen */
4516 startserial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4517 if(startserial == transfer_serial) {
4518 /* empty AXFR, not an IXFR */
4519 verbose(VERB_OPS, "IXFR second serial same as first");
4522 if(startserial != xfr_serial) {
4523 /* wrong start serial, it does not match the serial in
4525 verbose(VERB_OPS, "IXFR is from serial %u to %u but %u "
4526 "in memory, rejecting the zone transfer",
4527 (unsigned)startserial, (unsigned)transfer_serial,
4528 (unsigned)xfr_serial);
4531 /* everything OK in second SOA serial */
4535 /** apply IXFR to zone in memory. z is locked. false on failure(mallocfail) */
4537 apply_ixfr(struct auth_xfer* xfr, struct auth_zone* z,
4538 struct sldns_buffer* scratch_buffer)
4540 struct auth_chunk* rr_chunk;
4543 uint8_t* rr_dname, *rr_rdata;
4544 uint16_t rr_type, rr_class, rr_rdlen;
4547 int have_transfer_serial = 0;
4548 uint32_t transfer_serial = 0;
4549 size_t rr_counter = 0;
4553 /* start RR iterator over chunklist of packets */
4554 chunk_rrlist_start(xfr, &rr_chunk, &rr_num, &rr_pos);
4555 while(!chunk_rrlist_end(rr_chunk, rr_num)) {
4556 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4557 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4558 &rr_rdata, &rr_nextpos)) {
4559 /* failed to parse RR */
4562 if(verbosity>=7) log_rrlist_position("apply ixfr",
4563 rr_chunk, rr_dname, rr_type, rr_counter);
4564 /* twiddle add/del mode and check for start and end */
4565 if(rr_counter == 0 && rr_type != LDNS_RR_TYPE_SOA)
4567 if(rr_counter == 1 && rr_type != LDNS_RR_TYPE_SOA) {
4568 /* this is an AXFR returned from the IXFR master */
4569 /* but that should already have been detected, by
4570 * on_ixfr_is_axfr */
4573 if(rr_type == LDNS_RR_TYPE_SOA) {
4575 if(rr_rdlen < 22) return 0; /* bad SOA rdlen */
4576 serial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4577 if(have_transfer_serial == 0) {
4578 have_transfer_serial = 1;
4579 transfer_serial = serial;
4580 delmode = 1; /* gets negated below */
4581 /* check second RR before going any further */
4582 if(!ixfr_start_serial(rr_chunk, rr_num, rr_pos,
4583 rr_dname, rr_type, rr_class, rr_ttl,
4584 rr_rdlen, rr_rdata, rr_nextpos,
4585 transfer_serial, xfr->serial)) {
4588 } else if(transfer_serial == serial) {
4589 have_transfer_serial++;
4590 if(rr_counter == 1) {
4591 /* empty AXFR, with SOA; SOA; */
4592 /* should have been detected by
4593 * on_ixfr_is_axfr */
4596 if(have_transfer_serial == 3) {
4597 /* see serial three times for end */
4600 * SOA 1 second RR, followed by del
4601 * SOA 2 followed by add
4602 * SOA 2 followed by del
4603 * SOA 3 followed by add
4605 /* ended by SOA record */
4606 xfr->serial = transfer_serial;
4610 /* twiddle add/del mode */
4611 /* switch from delete part to add part and back again
4612 * just before the soa, it gets deleted and added too
4613 * this means we switch to delete mode for the final
4614 * SOA(so skip that one) */
4617 /* process this RR */
4618 /* if the RR is deleted twice or added twice, then we
4619 * softfail, and continue with the rest of the IXFR, so
4620 * that we serve something fairly nice during the refetch */
4621 if(verbosity>=7) log_rrlist_position((delmode?"del":"add"),
4622 rr_chunk, rr_dname, rr_type, rr_counter);
4624 /* delete this RR */
4626 if(!az_remove_rr_decompress(z, rr_chunk->data,
4627 rr_chunk->len, scratch_buffer, rr_dname,
4628 rr_type, rr_class, rr_ttl, rr_rdata, rr_rdlen,
4630 /* failed, malloc error or so */
4634 /* it was removal of a nonexisting RR */
4635 if(verbosity>=4) log_rrlist_position(
4636 "IXFR error nonexistent RR",
4637 rr_chunk, rr_dname, rr_type, rr_counter);
4640 } else if(rr_counter != 0) {
4641 /* skip first SOA RR for addition, it is added in
4642 * the addition part near the end of the ixfr, when
4643 * that serial is seen the second time. */
4646 if(!az_insert_rr_decompress(z, rr_chunk->data,
4647 rr_chunk->len, scratch_buffer, rr_dname,
4648 rr_type, rr_class, rr_ttl, rr_rdata, rr_rdlen,
4650 /* failed, malloc error or so */
4654 /* it was a duplicate */
4655 if(verbosity>=4) log_rrlist_position(
4656 "IXFR error duplicate RR",
4657 rr_chunk, rr_dname, rr_type, rr_counter);
4663 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4666 verbose(VERB_ALGO, "IXFR did not apply cleanly, fetching full zone");
4672 /** apply AXFR to zone in memory. z is locked. false on failure(mallocfail) */
4674 apply_axfr(struct auth_xfer* xfr, struct auth_zone* z,
4675 struct sldns_buffer* scratch_buffer)
4677 struct auth_chunk* rr_chunk;
4680 uint8_t* rr_dname, *rr_rdata;
4681 uint16_t rr_type, rr_class, rr_rdlen;
4683 uint32_t serial = 0;
4685 size_t rr_counter = 0;
4686 int have_end_soa = 0;
4688 /* clear the data tree */
4689 traverse_postorder(&z->data, auth_data_del, NULL);
4690 rbtree_init(&z->data, &auth_data_cmp);
4694 /* insert all RRs in to the zone */
4695 /* insert the SOA only once, skip the last one */
4696 /* start RR iterator over chunklist of packets */
4697 chunk_rrlist_start(xfr, &rr_chunk, &rr_num, &rr_pos);
4698 while(!chunk_rrlist_end(rr_chunk, rr_num)) {
4699 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4700 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4701 &rr_rdata, &rr_nextpos)) {
4702 /* failed to parse RR */
4705 if(verbosity>=7) log_rrlist_position("apply_axfr",
4706 rr_chunk, rr_dname, rr_type, rr_counter);
4707 if(rr_type == LDNS_RR_TYPE_SOA) {
4708 if(rr_counter != 0) {
4709 /* end of the axfr */
4713 if(rr_rdlen < 22) return 0; /* bad SOA rdlen */
4714 serial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4718 if(!az_insert_rr_decompress(z, rr_chunk->data, rr_chunk->len,
4719 scratch_buffer, rr_dname, rr_type, rr_class, rr_ttl,
4720 rr_rdata, rr_rdlen, NULL)) {
4721 /* failed, malloc error or so */
4726 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4729 log_err("no end SOA record for AXFR");
4733 xfr->serial = serial;
4738 /** apply HTTP to zone in memory. z is locked. false on failure(mallocfail) */
4740 apply_http(struct auth_xfer* xfr, struct auth_zone* z,
4741 struct sldns_buffer* scratch_buffer)
4743 /* parse data in chunks */
4744 /* parse RR's and read into memory. ignore $INCLUDE from the
4746 struct sldns_file_parse_state pstate;
4747 struct auth_chunk* chunk;
4749 memset(&pstate, 0, sizeof(pstate));
4750 pstate.default_ttl = 3600;
4751 if(xfr->namelen < sizeof(pstate.origin)) {
4752 pstate.origin_len = xfr->namelen;
4753 memmove(pstate.origin, xfr->name, xfr->namelen);
4756 if(verbosity >= VERB_ALGO)
4757 verbose(VERB_ALGO, "http download %s of size %d",
4758 xfr->task_transfer->master->file,
4759 (int)chunklist_sum(xfr->task_transfer->chunks_first));
4760 if(xfr->task_transfer->chunks_first && verbosity >= VERB_ALGO) {
4762 if(xfr->task_transfer->chunks_first->len+1 > sizeof(preview)) {
4763 memmove(preview, xfr->task_transfer->chunks_first->data,
4765 preview[sizeof(preview)-1]=0;
4767 memmove(preview, xfr->task_transfer->chunks_first->data,
4768 xfr->task_transfer->chunks_first->len);
4769 preview[xfr->task_transfer->chunks_first->len]=0;
4771 log_info("auth zone http downloaded content preview: %s",
4775 /* perhaps a little syntax check before we try to apply the data? */
4776 if(!http_zonefile_syntax_check(xfr, scratch_buffer)) {
4777 log_err("http download %s/%s does not contain a zonefile, "
4778 "but got '%s'", xfr->task_transfer->master->host,
4779 xfr->task_transfer->master->file,
4780 sldns_buffer_begin(scratch_buffer));
4784 /* clear the data tree */
4785 traverse_postorder(&z->data, auth_data_del, NULL);
4786 rbtree_init(&z->data, &auth_data_cmp);
4790 chunk = xfr->task_transfer->chunks_first;
4793 while(chunkline_get_line_collated(&chunk, &chunk_pos, scratch_buffer)) {
4794 /* process this line */
4796 chunkline_newline_removal(scratch_buffer);
4797 if(chunkline_is_comment_line_or_empty(scratch_buffer)) {
4800 /* parse line and add RR */
4801 if(http_parse_origin(scratch_buffer, &pstate)) {
4802 continue; /* $ORIGIN has been handled */
4804 if(http_parse_ttl(scratch_buffer, &pstate)) {
4805 continue; /* $TTL has been handled */
4807 if(!http_parse_add_rr(xfr, z, scratch_buffer, &pstate)) {
4808 verbose(VERB_ALGO, "error parsing line [%s:%d] %s",
4809 xfr->task_transfer->master->file,
4811 sldns_buffer_begin(scratch_buffer));
4818 /** write http chunks to zonefile to create downloaded file */
4820 auth_zone_write_chunks(struct auth_xfer* xfr, const char* fname)
4823 struct auth_chunk* p;
4824 out = fopen(fname, "w");
4826 log_err("could not open %s: %s", fname, strerror(errno));
4829 for(p = xfr->task_transfer->chunks_first; p ; p = p->next) {
4830 if(!write_out(out, (char*)p->data, p->len)) {
4831 log_err("could not write http download to %s", fname);
4840 /** write to zonefile after zone has been updated */
4842 xfr_write_after_update(struct auth_xfer* xfr, struct module_env* env)
4844 struct config_file* cfg = env->cfg;
4845 struct auth_zone* z;
4848 lock_basic_unlock(&xfr->lock);
4850 /* get lock again, so it is a readlock and concurrently queries
4851 * can be answered */
4852 lock_rw_rdlock(&env->auth_zones->lock);
4853 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
4856 lock_rw_unlock(&env->auth_zones->lock);
4857 /* the zone is gone, ignore xfr results */
4858 lock_basic_lock(&xfr->lock);
4861 lock_rw_rdlock(&z->lock);
4862 lock_basic_lock(&xfr->lock);
4863 lock_rw_unlock(&env->auth_zones->lock);
4865 if(z->zonefile == NULL || z->zonefile[0] == 0) {
4866 lock_rw_unlock(&z->lock);
4867 /* no write needed, no zonefile set */
4870 zfilename = z->zonefile;
4871 if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(zfilename,
4872 cfg->chrootdir, strlen(cfg->chrootdir)) == 0)
4873 zfilename += strlen(cfg->chrootdir);
4874 if(verbosity >= VERB_ALGO) {
4876 dname_str(z->name, nm);
4877 verbose(VERB_ALGO, "write zonefile %s for %s", zfilename, nm);
4880 /* write to tempfile first */
4881 if((size_t)strlen(zfilename) + 16 > sizeof(tmpfile)) {
4882 verbose(VERB_ALGO, "tmpfilename too long, cannot update "
4883 " zonefile %s", zfilename);
4884 lock_rw_unlock(&z->lock);
4887 snprintf(tmpfile, sizeof(tmpfile), "%s.tmp%u", zfilename,
4888 (unsigned)getpid());
4889 if(xfr->task_transfer->master->http) {
4890 /* use the stored chunk list to write them */
4891 if(!auth_zone_write_chunks(xfr, tmpfile)) {
4893 lock_rw_unlock(&z->lock);
4896 } else if(!auth_zone_write_file(z, tmpfile)) {
4898 lock_rw_unlock(&z->lock);
4901 if(rename(tmpfile, zfilename) < 0) {
4902 log_err("could not rename(%s, %s): %s", tmpfile, zfilename,
4905 lock_rw_unlock(&z->lock);
4908 lock_rw_unlock(&z->lock);
4911 /** process chunk list and update zone in memory,
4912 * return false if it did not work */
4914 xfr_process_chunk_list(struct auth_xfer* xfr, struct module_env* env,
4917 struct auth_zone* z;
4919 /* obtain locks and structures */
4920 /* release xfr lock, then, while holding az->lock grab both
4921 * z->lock and xfr->lock */
4922 lock_basic_unlock(&xfr->lock);
4923 lock_rw_rdlock(&env->auth_zones->lock);
4924 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
4927 lock_rw_unlock(&env->auth_zones->lock);
4928 /* the zone is gone, ignore xfr results */
4929 lock_basic_lock(&xfr->lock);
4932 lock_rw_wrlock(&z->lock);
4933 lock_basic_lock(&xfr->lock);
4934 lock_rw_unlock(&env->auth_zones->lock);
4937 if(xfr->task_transfer->master->http) {
4938 if(!apply_http(xfr, z, env->scratch_buffer)) {
4939 lock_rw_unlock(&z->lock);
4940 verbose(VERB_ALGO, "http from %s: could not store data",
4941 xfr->task_transfer->master->host);
4944 } else if(xfr->task_transfer->on_ixfr &&
4945 !xfr->task_transfer->on_ixfr_is_axfr) {
4946 if(!apply_ixfr(xfr, z, env->scratch_buffer)) {
4947 lock_rw_unlock(&z->lock);
4948 verbose(VERB_ALGO, "xfr from %s: could not store IXFR"
4949 " data", xfr->task_transfer->master->host);
4954 if(!apply_axfr(xfr, z, env->scratch_buffer)) {
4955 lock_rw_unlock(&z->lock);
4956 verbose(VERB_ALGO, "xfr from %s: could not store AXFR"
4957 " data", xfr->task_transfer->master->host);
4961 xfr->zone_expired = 0;
4962 z->zone_expired = 0;
4963 if(!xfr_find_soa(z, xfr)) {
4964 lock_rw_unlock(&z->lock);
4965 verbose(VERB_ALGO, "xfr from %s: no SOA in zone after update"
4966 " (or malformed RR)", xfr->task_transfer->master->host);
4970 xfr->lease_time = *env->now;
4973 lock_rw_unlock(&z->lock);
4975 if(verbosity >= VERB_QUERY && xfr->have_zone) {
4977 dname_str(xfr->name, zname);
4978 verbose(VERB_QUERY, "auth zone %s updated to serial %u", zname,
4979 (unsigned)xfr->serial);
4981 /* see if we need to write to a zonefile */
4982 xfr_write_after_update(xfr, env);
4986 /** disown task_transfer. caller must hold xfr.lock */
4988 xfr_transfer_disown(struct auth_xfer* xfr)
4990 /* remove timer (from this worker's event base) */
4991 comm_timer_delete(xfr->task_transfer->timer);
4992 xfr->task_transfer->timer = NULL;
4993 /* remove the commpoint */
4994 comm_point_delete(xfr->task_transfer->cp);
4995 xfr->task_transfer->cp = NULL;
4996 /* we don't own this item anymore */
4997 xfr->task_transfer->worker = NULL;
4998 xfr->task_transfer->env = NULL;
5001 /** lookup a host name for its addresses, if needed */
5003 xfr_transfer_lookup_host(struct auth_xfer* xfr, struct module_env* env)
5005 struct sockaddr_storage addr;
5006 socklen_t addrlen = 0;
5007 struct auth_master* master = xfr->task_transfer->lookup_target;
5008 struct query_info qinfo;
5009 uint16_t qflags = BIT_RD;
5010 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
5011 struct edns_data edns;
5012 sldns_buffer* buf = env->scratch_buffer;
5013 if(!master) return 0;
5014 if(extstrtoaddr(master->host, &addr, &addrlen)) {
5015 /* not needed, host is in IP addr format */
5018 if(master->allow_notify)
5019 return 0; /* allow-notifies are not transferred from, no
5022 /* use mesh_new_callback to probe for non-addr hosts,
5023 * and then wait for them to be looked up (in cache, or query) */
5024 qinfo.qname_len = sizeof(dname);
5025 if(sldns_str2wire_dname_buf(master->host, dname, &qinfo.qname_len)
5027 log_err("cannot parse host name of master %s", master->host);
5030 qinfo.qname = dname;
5031 qinfo.qclass = xfr->dclass;
5032 qinfo.qtype = LDNS_RR_TYPE_A;
5033 if(xfr->task_transfer->lookup_aaaa)
5034 qinfo.qtype = LDNS_RR_TYPE_AAAA;
5035 qinfo.local_alias = NULL;
5036 if(verbosity >= VERB_ALGO) {
5038 char buf2[LDNS_MAX_DOMAINLEN+1];
5039 dname_str(xfr->name, buf2);
5040 snprintf(buf1, sizeof(buf1), "auth zone %s: master lookup"
5041 " for task_transfer", buf2);
5042 log_query_info(VERB_ALGO, buf1, &qinfo);
5044 edns.edns_present = 1;
5046 edns.edns_version = 0;
5047 edns.bits = EDNS_DO;
5048 edns.opt_list = NULL;
5049 if(sldns_buffer_capacity(buf) < 65535)
5050 edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
5051 else edns.udp_size = 65535;
5053 /* unlock xfr during mesh_new_callback() because the callback can be
5054 * called straight away */
5055 lock_basic_unlock(&xfr->lock);
5056 if(!mesh_new_callback(env->mesh, &qinfo, qflags, &edns, buf, 0,
5057 &auth_xfer_transfer_lookup_callback, xfr)) {
5058 lock_basic_lock(&xfr->lock);
5059 log_err("out of memory lookup up master %s", master->host);
5062 lock_basic_lock(&xfr->lock);
5066 /** initiate TCP to the target and fetch zone.
5067 * returns true if that was successfully started, and timeout setup. */
5069 xfr_transfer_init_fetch(struct auth_xfer* xfr, struct module_env* env)
5071 struct sockaddr_storage addr;
5072 socklen_t addrlen = 0;
5073 struct auth_master* master = xfr->task_transfer->master;
5074 char *auth_name = NULL;
5077 if(!master) return 0;
5078 if(master->allow_notify) return 0; /* only for notify */
5080 /* get master addr */
5081 if(xfr->task_transfer->scan_addr) {
5082 addrlen = xfr->task_transfer->scan_addr->addrlen;
5083 memmove(&addr, &xfr->task_transfer->scan_addr->addr, addrlen);
5085 if(!authextstrtoaddr(master->host, &addr, &addrlen, &auth_name)) {
5086 /* the ones that are not in addr format are supposed
5087 * to be looked up. The lookup has failed however,
5090 dname_str(xfr->name, zname);
5091 log_err("%s: failed lookup, cannot transfer from master %s",
5092 zname, master->host);
5097 /* remove previous TCP connection (if any) */
5098 if(xfr->task_transfer->cp) {
5099 comm_point_delete(xfr->task_transfer->cp);
5100 xfr->task_transfer->cp = NULL;
5102 if(!xfr->task_transfer->timer) {
5103 xfr->task_transfer->timer = comm_timer_create(env->worker_base,
5104 auth_xfer_transfer_timer_callback, xfr);
5105 if(!xfr->task_transfer->timer) {
5106 log_err("malloc failure");
5110 timeout = AUTH_TRANSFER_TIMEOUT;
5112 t.tv_sec = timeout/1000;
5113 t.tv_usec = (timeout%1000)*1000;
5117 /* perform http fetch */
5118 /* store http port number into sockaddr,
5119 * unless someone used unbound's host@port notation */
5120 xfr->task_transfer->on_ixfr = 0;
5121 if(strchr(master->host, '@') == NULL)
5122 sockaddr_store_port(&addr, addrlen, master->port);
5123 xfr->task_transfer->cp = outnet_comm_point_for_http(
5124 env->outnet, auth_xfer_transfer_http_callback, xfr,
5125 &addr, addrlen, -1, master->ssl, master->host,
5127 if(!xfr->task_transfer->cp) {
5128 char zname[255+1], as[256];
5129 dname_str(xfr->name, zname);
5130 addr_to_str(&addr, addrlen, as, sizeof(as));
5131 verbose(VERB_ALGO, "cannot create http cp "
5132 "connection for %s to %s", zname, as);
5135 comm_timer_set(xfr->task_transfer->timer, &t);
5136 if(verbosity >= VERB_ALGO) {
5137 char zname[255+1], as[256];
5138 dname_str(xfr->name, zname);
5139 addr_to_str(&addr, addrlen, as, sizeof(as));
5140 verbose(VERB_ALGO, "auth zone %s transfer next HTTP fetch from %s started", zname, as);
5145 /* perform AXFR/IXFR */
5146 /* set the packet to be written */
5148 xfr->task_transfer->id = (uint16_t)(ub_random(env->rnd)&0xffff);
5149 xfr_create_ixfr_packet(xfr, env->scratch_buffer,
5150 xfr->task_transfer->id, master);
5153 xfr->task_transfer->cp = outnet_comm_point_for_tcp(env->outnet,
5154 auth_xfer_transfer_tcp_callback, xfr, &addr, addrlen,
5155 env->scratch_buffer, -1,
5156 auth_name != NULL, auth_name);
5157 if(!xfr->task_transfer->cp) {
5158 char zname[255+1], as[256];
5159 dname_str(xfr->name, zname);
5160 addr_to_str(&addr, addrlen, as, sizeof(as));
5161 verbose(VERB_ALGO, "cannot create tcp cp connection for "
5162 "xfr %s to %s", zname, as);
5165 comm_timer_set(xfr->task_transfer->timer, &t);
5166 if(verbosity >= VERB_ALGO) {
5167 char zname[255+1], as[256];
5168 dname_str(xfr->name, zname);
5169 addr_to_str(&addr, addrlen, as, sizeof(as));
5170 verbose(VERB_ALGO, "auth zone %s transfer next %s fetch from %s started", zname,
5171 (xfr->task_transfer->on_ixfr?"IXFR":"AXFR"), as);
5176 /** perform next lookup, next transfer TCP, or end and resume wait time task */
5178 xfr_transfer_nexttarget_or_end(struct auth_xfer* xfr, struct module_env* env)
5180 log_assert(xfr->task_transfer->worker == env->worker);
5182 /* are we performing lookups? */
5183 while(xfr->task_transfer->lookup_target) {
5184 if(xfr_transfer_lookup_host(xfr, env)) {
5185 /* wait for lookup to finish,
5186 * note that the hostname may be in unbound's cache
5187 * and we may then get an instant cache response,
5188 * and that calls the callback just like a full
5189 * lookup and lookup failures also call callback */
5190 if(verbosity >= VERB_ALGO) {
5192 dname_str(xfr->name, zname);
5193 verbose(VERB_ALGO, "auth zone %s transfer next target lookup", zname);
5195 lock_basic_unlock(&xfr->lock);
5198 xfr_transfer_move_to_next_lookup(xfr, env);
5201 /* initiate TCP and fetch the zone from the master */
5202 /* and set timeout on it */
5203 while(!xfr_transfer_end_of_list(xfr)) {
5204 xfr->task_transfer->master = xfr_transfer_current_master(xfr);
5205 if(xfr_transfer_init_fetch(xfr, env)) {
5206 /* successfully started, wait for callback */
5207 lock_basic_unlock(&xfr->lock);
5210 /* failed to fetch, next master */
5211 xfr_transfer_nextmaster(xfr);
5213 if(verbosity >= VERB_ALGO) {
5215 dname_str(xfr->name, zname);
5216 verbose(VERB_ALGO, "auth zone %s transfer failed, wait", zname);
5219 /* we failed to fetch the zone, move to wait task
5220 * use the shorter retry timeout */
5221 xfr_transfer_disown(xfr);
5223 /* pick up the nextprobe task and wait */
5224 if(xfr->task_nextprobe->worker == NULL)
5225 xfr_set_timeout(xfr, env, 1, 0);
5226 lock_basic_unlock(&xfr->lock);
5229 /** add addrs from A or AAAA rrset to the master */
5231 xfr_master_add_addrs(struct auth_master* m, struct ub_packed_rrset_key* rrset,
5235 struct packed_rrset_data* data;
5236 if(!m || !rrset) return;
5237 if(rrtype != LDNS_RR_TYPE_A && rrtype != LDNS_RR_TYPE_AAAA)
5239 data = (struct packed_rrset_data*)rrset->entry.data;
5240 for(i=0; i<data->count; i++) {
5241 struct auth_addr* a;
5242 size_t len = data->rr_len[i] - 2;
5243 uint8_t* rdata = data->rr_data[i]+2;
5244 if(rrtype == LDNS_RR_TYPE_A && len != INET_SIZE)
5245 continue; /* wrong length for A */
5246 if(rrtype == LDNS_RR_TYPE_AAAA && len != INET6_SIZE)
5247 continue; /* wrong length for AAAA */
5249 /* add and alloc it */
5250 a = (struct auth_addr*)calloc(1, sizeof(*a));
5252 log_err("out of memory");
5255 if(rrtype == LDNS_RR_TYPE_A) {
5256 struct sockaddr_in* sa;
5257 a->addrlen = (socklen_t)sizeof(*sa);
5258 sa = (struct sockaddr_in*)&a->addr;
5259 sa->sin_family = AF_INET;
5260 sa->sin_port = (in_port_t)htons(UNBOUND_DNS_PORT);
5261 memmove(&sa->sin_addr, rdata, INET_SIZE);
5263 struct sockaddr_in6* sa;
5264 a->addrlen = (socklen_t)sizeof(*sa);
5265 sa = (struct sockaddr_in6*)&a->addr;
5266 sa->sin6_family = AF_INET6;
5267 sa->sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT);
5268 memmove(&sa->sin6_addr, rdata, INET6_SIZE);
5270 if(verbosity >= VERB_ALGO) {
5272 addr_to_str(&a->addr, a->addrlen, s, sizeof(s));
5273 verbose(VERB_ALGO, "auth host %s lookup %s",
5276 /* append to list */
5282 /** callback for task_transfer lookup of host name, of A or AAAA */
5283 void auth_xfer_transfer_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
5284 enum sec_status ATTR_UNUSED(sec), char* ATTR_UNUSED(why_bogus),
5285 int ATTR_UNUSED(was_ratelimited))
5287 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5288 struct module_env* env;
5289 log_assert(xfr->task_transfer);
5290 lock_basic_lock(&xfr->lock);
5291 env = xfr->task_transfer->env;
5292 if(env->outnet->want_to_quit) {
5293 lock_basic_unlock(&xfr->lock);
5294 return; /* stop on quit */
5297 /* process result */
5298 if(rcode == LDNS_RCODE_NOERROR) {
5299 uint16_t wanted_qtype = LDNS_RR_TYPE_A;
5300 struct regional* temp = env->scratch;
5301 struct query_info rq;
5302 struct reply_info* rep;
5303 if(xfr->task_transfer->lookup_aaaa)
5304 wanted_qtype = LDNS_RR_TYPE_AAAA;
5305 memset(&rq, 0, sizeof(rq));
5306 rep = parse_reply_in_temp_region(buf, temp, &rq);
5307 if(rep && rq.qtype == wanted_qtype &&
5308 FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_NOERROR) {
5309 /* parsed successfully */
5310 struct ub_packed_rrset_key* answer =
5311 reply_find_answer_rrset(&rq, rep);
5313 xfr_master_add_addrs(xfr->task_transfer->
5314 lookup_target, answer, wanted_qtype);
5316 if(verbosity >= VERB_ALGO) {
5318 dname_str(xfr->name, zname);
5319 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"));
5323 if(verbosity >= VERB_ALGO) {
5325 dname_str(xfr->name, zname);
5326 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"));
5330 if(verbosity >= VERB_ALGO) {
5332 dname_str(xfr->name, zname);
5333 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"));
5336 if(xfr->task_transfer->lookup_target->list &&
5337 xfr->task_transfer->lookup_target == xfr_transfer_current_master(xfr))
5338 xfr->task_transfer->scan_addr = xfr->task_transfer->lookup_target->list;
5340 /* move to lookup AAAA after A lookup, move to next hostname lookup,
5341 * or move to fetch the zone, or, if nothing to do, end task_transfer */
5342 xfr_transfer_move_to_next_lookup(xfr, env);
5343 xfr_transfer_nexttarget_or_end(xfr, env);
5346 /** check if xfer (AXFR or IXFR) packet is OK.
5347 * return false if we lost connection (SERVFAIL, or unreadable).
5348 * return false if we need to move from IXFR to AXFR, with gonextonfail
5349 * set to false, so the same master is tried again, but with AXFR.
5350 * return true if fine to link into data.
5351 * return true with transferdone=true when the transfer has ended.
5354 check_xfer_packet(sldns_buffer* pkt, struct auth_xfer* xfr,
5355 int* gonextonfail, int* transferdone)
5357 uint8_t* wire = sldns_buffer_begin(pkt);
5359 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE) {
5360 verbose(VERB_ALGO, "xfr to %s failed, packet too small",
5361 xfr->task_transfer->master->host);
5364 if(!LDNS_QR_WIRE(wire)) {
5365 verbose(VERB_ALGO, "xfr to %s failed, packet has no QR flag",
5366 xfr->task_transfer->master->host);
5369 if(LDNS_TC_WIRE(wire)) {
5370 verbose(VERB_ALGO, "xfr to %s failed, packet has TC flag",
5371 xfr->task_transfer->master->host);
5375 if(LDNS_ID_WIRE(wire) != xfr->task_transfer->id) {
5376 verbose(VERB_ALGO, "xfr to %s failed, packet wrong ID",
5377 xfr->task_transfer->master->host);
5380 if(LDNS_RCODE_WIRE(wire) != LDNS_RCODE_NOERROR) {
5382 sldns_wire2str_rcode_buf((int)LDNS_RCODE_WIRE(wire), rcode,
5384 /* if we are doing IXFR, check for fallback */
5385 if(xfr->task_transfer->on_ixfr) {
5386 if(LDNS_RCODE_WIRE(wire) == LDNS_RCODE_NOTIMPL ||
5387 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_SERVFAIL ||
5388 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_REFUSED ||
5389 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_FORMERR) {
5390 verbose(VERB_ALGO, "xfr to %s, fallback "
5391 "from IXFR to AXFR (with rcode %s)",
5392 xfr->task_transfer->master->host,
5394 xfr->task_transfer->ixfr_fail = 1;
5399 verbose(VERB_ALGO, "xfr to %s failed, packet with rcode %s",
5400 xfr->task_transfer->master->host, rcode);
5403 if(LDNS_OPCODE_WIRE(wire) != LDNS_PACKET_QUERY) {
5404 verbose(VERB_ALGO, "xfr to %s failed, packet with bad opcode",
5405 xfr->task_transfer->master->host);
5408 if(LDNS_QDCOUNT(wire) > 1) {
5409 verbose(VERB_ALGO, "xfr to %s failed, packet has qdcount %d",
5410 xfr->task_transfer->master->host,
5411 (int)LDNS_QDCOUNT(wire));
5416 sldns_buffer_set_position(pkt, LDNS_HEADER_SIZE);
5417 for(i=0; i<(int)LDNS_QDCOUNT(wire); i++) {
5418 size_t pos = sldns_buffer_position(pkt);
5419 uint16_t qtype, qclass;
5420 if(pkt_dname_len(pkt) == 0) {
5421 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5423 xfr->task_transfer->master->host);
5426 if(dname_pkt_compare(pkt, sldns_buffer_at(pkt, pos),
5428 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5430 xfr->task_transfer->master->host);
5433 if(sldns_buffer_remaining(pkt) < 4) {
5434 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5435 "truncated query RR",
5436 xfr->task_transfer->master->host);
5439 qtype = sldns_buffer_read_u16(pkt);
5440 qclass = sldns_buffer_read_u16(pkt);
5441 if(qclass != xfr->dclass) {
5442 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5444 xfr->task_transfer->master->host);
5447 if(xfr->task_transfer->on_ixfr) {
5448 if(qtype != LDNS_RR_TYPE_IXFR) {
5449 verbose(VERB_ALGO, "xfr to %s failed, packet "
5450 "with wrong qtype, expected IXFR",
5451 xfr->task_transfer->master->host);
5455 if(qtype != LDNS_RR_TYPE_AXFR) {
5456 verbose(VERB_ALGO, "xfr to %s failed, packet "
5457 "with wrong qtype, expected AXFR",
5458 xfr->task_transfer->master->host);
5464 /* check parse of RRs in packet, store first SOA serial
5465 * to be able to detect last SOA (with that serial) to see if done */
5466 /* also check for IXFR 'zone up to date' reply */
5467 for(i=0; i<(int)LDNS_ANCOUNT(wire); i++) {
5468 size_t pos = sldns_buffer_position(pkt);
5470 if(pkt_dname_len(pkt) == 0) {
5471 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5472 "malformed dname in answer section",
5473 xfr->task_transfer->master->host);
5476 if(sldns_buffer_remaining(pkt) < 10) {
5477 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5479 xfr->task_transfer->master->host);
5482 tp = sldns_buffer_read_u16(pkt);
5483 (void)sldns_buffer_read_u16(pkt); /* class */
5484 (void)sldns_buffer_read_u32(pkt); /* ttl */
5485 rdlen = sldns_buffer_read_u16(pkt);
5486 if(sldns_buffer_remaining(pkt) < rdlen) {
5487 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5488 "truncated RR rdata",
5489 xfr->task_transfer->master->host);
5493 /* RR parses (haven't checked rdata itself), now look at
5494 * SOA records to see serial number */
5495 if(xfr->task_transfer->rr_scan_num == 0 &&
5496 tp != LDNS_RR_TYPE_SOA) {
5497 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5498 "malformed zone transfer, no start SOA",
5499 xfr->task_transfer->master->host);
5502 if(xfr->task_transfer->rr_scan_num == 1 &&
5503 tp != LDNS_RR_TYPE_SOA) {
5504 /* second RR is not a SOA record, this is not an IXFR
5505 * the master is replying with an AXFR */
5506 xfr->task_transfer->on_ixfr_is_axfr = 1;
5508 if(tp == LDNS_RR_TYPE_SOA) {
5511 verbose(VERB_ALGO, "xfr to %s failed, packet "
5512 "with SOA with malformed rdata",
5513 xfr->task_transfer->master->host);
5516 if(dname_pkt_compare(pkt, sldns_buffer_at(pkt, pos),
5518 verbose(VERB_ALGO, "xfr to %s failed, packet "
5519 "with SOA with wrong dname",
5520 xfr->task_transfer->master->host);
5524 /* read serial number of SOA */
5525 serial = sldns_buffer_read_u32_at(pkt,
5526 sldns_buffer_position(pkt)+rdlen-20);
5528 /* check for IXFR 'zone has SOA x' reply */
5529 if(xfr->task_transfer->on_ixfr &&
5530 xfr->task_transfer->rr_scan_num == 0 &&
5531 LDNS_ANCOUNT(wire)==1) {
5532 verbose(VERB_ALGO, "xfr to %s ended, "
5533 "IXFR reply that zone has serial %u",
5534 xfr->task_transfer->master->host,
5539 /* if first SOA, store serial number */
5540 if(xfr->task_transfer->got_xfr_serial == 0) {
5541 xfr->task_transfer->got_xfr_serial = 1;
5542 xfr->task_transfer->incoming_xfr_serial =
5544 verbose(VERB_ALGO, "xfr %s: contains "
5546 xfr->task_transfer->master->host,
5548 /* see if end of AXFR */
5549 } else if(!xfr->task_transfer->on_ixfr ||
5550 xfr->task_transfer->on_ixfr_is_axfr) {
5551 /* second SOA with serial is the end
5554 verbose(VERB_ALGO, "xfr %s: last AXFR packet",
5555 xfr->task_transfer->master->host);
5556 /* for IXFR, count SOA records with that serial */
5557 } else if(xfr->task_transfer->incoming_xfr_serial ==
5558 serial && xfr->task_transfer->got_xfr_serial
5560 xfr->task_transfer->got_xfr_serial++;
5561 /* if not first soa, if serial==firstserial, the
5562 * third time we are at the end, for IXFR */
5563 } else if(xfr->task_transfer->incoming_xfr_serial ==
5564 serial && xfr->task_transfer->got_xfr_serial
5566 verbose(VERB_ALGO, "xfr %s: last IXFR packet",
5567 xfr->task_transfer->master->host);
5569 /* continue parse check, if that succeeds,
5570 * transfer is done */
5573 xfr->task_transfer->rr_scan_num++;
5575 /* skip over RR rdata to go to the next RR */
5576 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5579 /* check authority section */
5580 /* we skip over the RRs checking packet format */
5581 for(i=0; i<(int)LDNS_NSCOUNT(wire); i++) {
5583 if(pkt_dname_len(pkt) == 0) {
5584 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5585 "malformed dname in authority section",
5586 xfr->task_transfer->master->host);
5589 if(sldns_buffer_remaining(pkt) < 10) {
5590 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5592 xfr->task_transfer->master->host);
5595 (void)sldns_buffer_read_u16(pkt); /* type */
5596 (void)sldns_buffer_read_u16(pkt); /* class */
5597 (void)sldns_buffer_read_u32(pkt); /* ttl */
5598 rdlen = sldns_buffer_read_u16(pkt);
5599 if(sldns_buffer_remaining(pkt) < rdlen) {
5600 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5601 "truncated RR rdata",
5602 xfr->task_transfer->master->host);
5605 /* skip over RR rdata to go to the next RR */
5606 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5609 /* check additional section */
5610 for(i=0; i<(int)LDNS_ARCOUNT(wire); i++) {
5612 if(pkt_dname_len(pkt) == 0) {
5613 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5614 "malformed dname in additional section",
5615 xfr->task_transfer->master->host);
5618 if(sldns_buffer_remaining(pkt) < 10) {
5619 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5621 xfr->task_transfer->master->host);
5624 (void)sldns_buffer_read_u16(pkt); /* type */
5625 (void)sldns_buffer_read_u16(pkt); /* class */
5626 (void)sldns_buffer_read_u32(pkt); /* ttl */
5627 rdlen = sldns_buffer_read_u16(pkt);
5628 if(sldns_buffer_remaining(pkt) < rdlen) {
5629 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5630 "truncated RR rdata",
5631 xfr->task_transfer->master->host);
5634 /* skip over RR rdata to go to the next RR */
5635 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5641 /** Link the data from this packet into the worklist of transferred data */
5643 xfer_link_data(sldns_buffer* pkt, struct auth_xfer* xfr)
5646 struct auth_chunk* e;
5647 e = (struct auth_chunk*)calloc(1, sizeof(*e));
5650 e->len = sldns_buffer_limit(pkt);
5651 e->data = memdup(sldns_buffer_begin(pkt), e->len);
5657 /* alloc succeeded, link into list */
5658 if(!xfr->task_transfer->chunks_first)
5659 xfr->task_transfer->chunks_first = e;
5660 if(xfr->task_transfer->chunks_last)
5661 xfr->task_transfer->chunks_last->next = e;
5662 xfr->task_transfer->chunks_last = e;
5666 /** task transfer. the list of data is complete. process it and if failed
5667 * move to next master, if succeeded, end the task transfer */
5669 process_list_end_transfer(struct auth_xfer* xfr, struct module_env* env)
5672 if(xfr_process_chunk_list(xfr, env, &ixfr_fail)) {
5674 auth_chunks_delete(xfr->task_transfer);
5676 /* we fetched the zone, move to wait task */
5677 xfr_transfer_disown(xfr);
5679 if(xfr->notify_received && (!xfr->notify_has_serial ||
5680 (xfr->notify_has_serial &&
5681 xfr_serial_means_update(xfr, xfr->notify_serial)))) {
5682 uint32_t sr = xfr->notify_serial;
5683 int has_sr = xfr->notify_has_serial;
5684 /* we received a notify while probe/transfer was
5685 * in progress. start a new probe and transfer */
5686 xfr->notify_received = 0;
5687 xfr->notify_has_serial = 0;
5688 xfr->notify_serial = 0;
5689 if(!xfr_start_probe(xfr, env, NULL)) {
5690 /* if we couldn't start it, already in
5691 * progress; restore notify serial,
5692 * while xfr still locked */
5693 xfr->notify_received = 1;
5694 xfr->notify_has_serial = has_sr;
5695 xfr->notify_serial = sr;
5696 lock_basic_unlock(&xfr->lock);
5700 /* pick up the nextprobe task and wait (normail wait time) */
5701 if(xfr->task_nextprobe->worker == NULL)
5702 xfr_set_timeout(xfr, env, 0, 0);
5704 lock_basic_unlock(&xfr->lock);
5707 /* processing failed */
5708 /* when done, delete data from list */
5709 auth_chunks_delete(xfr->task_transfer);
5711 xfr->task_transfer->ixfr_fail = 1;
5713 xfr_transfer_nextmaster(xfr);
5715 xfr_transfer_nexttarget_or_end(xfr, env);
5718 /** callback for the task_transfer timer */
5720 auth_xfer_transfer_timer_callback(void* arg)
5722 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5723 struct module_env* env;
5724 int gonextonfail = 1;
5725 log_assert(xfr->task_transfer);
5726 lock_basic_lock(&xfr->lock);
5727 env = xfr->task_transfer->env;
5728 if(env->outnet->want_to_quit) {
5729 lock_basic_unlock(&xfr->lock);
5730 return; /* stop on quit */
5733 verbose(VERB_ALGO, "xfr stopped, connection timeout to %s",
5734 xfr->task_transfer->master->host);
5736 /* see if IXFR caused the failure, if so, try AXFR */
5737 if(xfr->task_transfer->on_ixfr) {
5738 xfr->task_transfer->ixfr_possible_timeout_count++;
5739 if(xfr->task_transfer->ixfr_possible_timeout_count >=
5740 NUM_TIMEOUTS_FALLBACK_IXFR) {
5741 verbose(VERB_ALGO, "xfr to %s, fallback "
5742 "from IXFR to AXFR (because of timeouts)",
5743 xfr->task_transfer->master->host);
5744 xfr->task_transfer->ixfr_fail = 1;
5749 /* delete transferred data from list */
5750 auth_chunks_delete(xfr->task_transfer);
5751 comm_point_delete(xfr->task_transfer->cp);
5752 xfr->task_transfer->cp = NULL;
5754 xfr_transfer_nextmaster(xfr);
5755 xfr_transfer_nexttarget_or_end(xfr, env);
5758 /** callback for task_transfer tcp connections */
5760 auth_xfer_transfer_tcp_callback(struct comm_point* c, void* arg, int err,
5761 struct comm_reply* ATTR_UNUSED(repinfo))
5763 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5764 struct module_env* env;
5765 int gonextonfail = 1;
5766 int transferdone = 0;
5767 log_assert(xfr->task_transfer);
5768 lock_basic_lock(&xfr->lock);
5769 env = xfr->task_transfer->env;
5770 if(env->outnet->want_to_quit) {
5771 lock_basic_unlock(&xfr->lock);
5772 return 0; /* stop on quit */
5774 /* stop the timer */
5775 comm_timer_disable(xfr->task_transfer->timer);
5777 if(err != NETEVENT_NOERROR) {
5778 /* connection failed, closed, or timeout */
5779 /* stop this transfer, cleanup
5780 * and continue task_transfer*/
5781 verbose(VERB_ALGO, "xfr stopped, connection lost to %s",
5782 xfr->task_transfer->master->host);
5784 /* see if IXFR caused the failure, if so, try AXFR */
5785 if(xfr->task_transfer->on_ixfr) {
5786 xfr->task_transfer->ixfr_possible_timeout_count++;
5787 if(xfr->task_transfer->ixfr_possible_timeout_count >=
5788 NUM_TIMEOUTS_FALLBACK_IXFR) {
5789 verbose(VERB_ALGO, "xfr to %s, fallback "
5790 "from IXFR to AXFR (because of timeouts)",
5791 xfr->task_transfer->master->host);
5792 xfr->task_transfer->ixfr_fail = 1;
5798 /* delete transferred data from list */
5799 auth_chunks_delete(xfr->task_transfer);
5800 comm_point_delete(xfr->task_transfer->cp);
5801 xfr->task_transfer->cp = NULL;
5803 xfr_transfer_nextmaster(xfr);
5804 xfr_transfer_nexttarget_or_end(xfr, env);
5807 /* note that IXFR worked without timeout */
5808 if(xfr->task_transfer->on_ixfr)
5809 xfr->task_transfer->ixfr_possible_timeout_count = 0;
5811 /* handle returned packet */
5812 /* if it fails, cleanup and end this transfer */
5813 /* if it needs to fallback from IXFR to AXFR, do that */
5814 if(!check_xfer_packet(c->buffer, xfr, &gonextonfail, &transferdone)) {
5817 /* if it is good, link it into the list of data */
5818 /* if the link into list of data fails (malloc fail) cleanup and end */
5819 if(!xfer_link_data(c->buffer, xfr)) {
5820 verbose(VERB_ALGO, "xfr stopped to %s, malloc failed",
5821 xfr->task_transfer->master->host);
5824 /* if the transfer is done now, disconnect and process the list */
5826 comm_point_delete(xfr->task_transfer->cp);
5827 xfr->task_transfer->cp = NULL;
5828 process_list_end_transfer(xfr, env);
5832 /* if we want to read more messages, setup the commpoint to read
5833 * a DNS packet, and the timeout */
5834 lock_basic_unlock(&xfr->lock);
5835 c->tcp_is_reading = 1;
5836 sldns_buffer_clear(c->buffer);
5837 comm_point_start_listening(c, -1, AUTH_TRANSFER_TIMEOUT);
5841 /** callback for task_transfer http connections */
5843 auth_xfer_transfer_http_callback(struct comm_point* c, void* arg, int err,
5844 struct comm_reply* repinfo)
5846 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5847 struct module_env* env;
5848 log_assert(xfr->task_transfer);
5849 lock_basic_lock(&xfr->lock);
5850 env = xfr->task_transfer->env;
5851 if(env->outnet->want_to_quit) {
5852 lock_basic_unlock(&xfr->lock);
5853 return 0; /* stop on quit */
5855 verbose(VERB_ALGO, "auth zone transfer http callback");
5856 /* stop the timer */
5857 comm_timer_disable(xfr->task_transfer->timer);
5859 if(err != NETEVENT_NOERROR && err != NETEVENT_DONE) {
5860 /* connection failed, closed, or timeout */
5861 /* stop this transfer, cleanup
5862 * and continue task_transfer*/
5863 verbose(VERB_ALGO, "http stopped, connection lost to %s",
5864 xfr->task_transfer->master->host);
5866 /* delete transferred data from list */
5867 auth_chunks_delete(xfr->task_transfer);
5868 if(repinfo) repinfo->c = NULL; /* signal cp deleted to
5869 the routine calling this callback */
5870 comm_point_delete(xfr->task_transfer->cp);
5871 xfr->task_transfer->cp = NULL;
5872 xfr_transfer_nextmaster(xfr);
5873 xfr_transfer_nexttarget_or_end(xfr, env);
5877 /* if it is good, link it into the list of data */
5878 /* if the link into list of data fails (malloc fail) cleanup and end */
5879 if(sldns_buffer_limit(c->buffer) > 0) {
5880 verbose(VERB_ALGO, "auth zone http queued up %d bytes",
5881 (int)sldns_buffer_limit(c->buffer));
5882 if(!xfer_link_data(c->buffer, xfr)) {
5883 verbose(VERB_ALGO, "http stopped to %s, malloc failed",
5884 xfr->task_transfer->master->host);
5888 /* if the transfer is done now, disconnect and process the list */
5889 if(err == NETEVENT_DONE) {
5890 if(repinfo) repinfo->c = NULL; /* signal cp deleted to
5891 the routine calling this callback */
5892 comm_point_delete(xfr->task_transfer->cp);
5893 xfr->task_transfer->cp = NULL;
5894 process_list_end_transfer(xfr, env);
5898 /* if we want to read more messages, setup the commpoint to read
5899 * a DNS packet, and the timeout */
5900 lock_basic_unlock(&xfr->lock);
5901 c->tcp_is_reading = 1;
5902 sldns_buffer_clear(c->buffer);
5903 comm_point_start_listening(c, -1, AUTH_TRANSFER_TIMEOUT);
5908 /** start transfer task by this worker , xfr is locked. */
5910 xfr_start_transfer(struct auth_xfer* xfr, struct module_env* env,
5911 struct auth_master* master)
5913 log_assert(xfr->task_transfer != NULL);
5914 log_assert(xfr->task_transfer->worker == NULL);
5915 log_assert(xfr->task_transfer->chunks_first == NULL);
5916 log_assert(xfr->task_transfer->chunks_last == NULL);
5917 xfr->task_transfer->worker = env->worker;
5918 xfr->task_transfer->env = env;
5920 /* init transfer process */
5921 /* find that master in the transfer's list of masters? */
5922 xfr_transfer_start_list(xfr, master);
5923 /* start lookup for hostnames in transfer master list */
5924 xfr_transfer_start_lookups(xfr);
5926 /* initiate TCP, and set timeout on it */
5927 xfr_transfer_nexttarget_or_end(xfr, env);
5930 /** disown task_probe. caller must hold xfr.lock */
5932 xfr_probe_disown(struct auth_xfer* xfr)
5934 /* remove timer (from this worker's event base) */
5935 comm_timer_delete(xfr->task_probe->timer);
5936 xfr->task_probe->timer = NULL;
5937 /* remove the commpoint */
5938 comm_point_delete(xfr->task_probe->cp);
5939 xfr->task_probe->cp = NULL;
5940 /* we don't own this item anymore */
5941 xfr->task_probe->worker = NULL;
5942 xfr->task_probe->env = NULL;
5945 /** send the UDP probe to the master, this is part of task_probe */
5947 xfr_probe_send_probe(struct auth_xfer* xfr, struct module_env* env,
5950 struct sockaddr_storage addr;
5951 socklen_t addrlen = 0;
5954 struct auth_master* master = xfr_probe_current_master(xfr);
5955 char *auth_name = NULL;
5956 if(!master) return 0;
5957 if(master->allow_notify) return 0; /* only for notify */
5958 if(master->http) return 0; /* only masters get SOA UDP probe,
5959 not urls, if those are in this list */
5961 /* get master addr */
5962 if(xfr->task_probe->scan_addr) {
5963 addrlen = xfr->task_probe->scan_addr->addrlen;
5964 memmove(&addr, &xfr->task_probe->scan_addr->addr, addrlen);
5966 if(!authextstrtoaddr(master->host, &addr, &addrlen, &auth_name)) {
5967 /* the ones that are not in addr format are supposed
5968 * to be looked up. The lookup has failed however,
5971 dname_str(xfr->name, zname);
5972 log_err("%s: failed lookup, cannot probe to master %s",
5973 zname, master->host);
5976 if (auth_name != NULL) {
5977 if (addr.ss_family == AF_INET
5978 && (int)ntohs(((struct sockaddr_in *)&addr)->sin_port)
5979 == env->cfg->ssl_port)
5980 ((struct sockaddr_in *)&addr)->sin_port
5981 = htons((uint16_t)env->cfg->port);
5982 else if (addr.ss_family == AF_INET6
5983 && (int)ntohs(((struct sockaddr_in6 *)&addr)->sin6_port)
5984 == env->cfg->ssl_port)
5985 ((struct sockaddr_in6 *)&addr)->sin6_port
5986 = htons((uint16_t)env->cfg->port);
5991 /* create new ID for new probes, but not on timeout retries,
5992 * this means we'll accept replies to previous retries to same ip */
5993 if(timeout == AUTH_PROBE_TIMEOUT)
5994 xfr->task_probe->id = (uint16_t)(ub_random(env->rnd)&0xffff);
5995 xfr_create_soa_probe_packet(xfr, env->scratch_buffer,
5996 xfr->task_probe->id);
5997 /* we need to remove the cp if we have a different ip4/ip6 type now */
5998 if(xfr->task_probe->cp &&
5999 ((xfr->task_probe->cp_is_ip6 && !addr_is_ip6(&addr, addrlen)) ||
6000 (!xfr->task_probe->cp_is_ip6 && addr_is_ip6(&addr, addrlen)))
6002 comm_point_delete(xfr->task_probe->cp);
6003 xfr->task_probe->cp = NULL;
6005 if(!xfr->task_probe->cp) {
6006 if(addr_is_ip6(&addr, addrlen))
6007 xfr->task_probe->cp_is_ip6 = 1;
6008 else xfr->task_probe->cp_is_ip6 = 0;
6009 xfr->task_probe->cp = outnet_comm_point_for_udp(env->outnet,
6010 auth_xfer_probe_udp_callback, xfr, &addr, addrlen);
6011 if(!xfr->task_probe->cp) {
6012 char zname[255+1], as[256];
6013 dname_str(xfr->name, zname);
6014 addr_to_str(&addr, addrlen, as, sizeof(as));
6015 verbose(VERB_ALGO, "cannot create udp cp for "
6016 "probe %s to %s", zname, as);
6020 if(!xfr->task_probe->timer) {
6021 xfr->task_probe->timer = comm_timer_create(env->worker_base,
6022 auth_xfer_probe_timer_callback, xfr);
6023 if(!xfr->task_probe->timer) {
6024 log_err("malloc failure");
6029 /* send udp packet */
6030 if(!comm_point_send_udp_msg(xfr->task_probe->cp, env->scratch_buffer,
6031 (struct sockaddr*)&addr, addrlen)) {
6032 char zname[255+1], as[256];
6033 dname_str(xfr->name, zname);
6034 addr_to_str(&addr, addrlen, as, sizeof(as));
6035 verbose(VERB_ALGO, "failed to send soa probe for %s to %s",
6039 if(verbosity >= VERB_ALGO) {
6040 char zname[255+1], as[256];
6041 dname_str(xfr->name, zname);
6042 addr_to_str(&addr, addrlen, as, sizeof(as));
6043 verbose(VERB_ALGO, "auth zone %s soa probe sent to %s", zname,
6046 xfr->task_probe->timeout = timeout;
6048 t.tv_sec = timeout/1000;
6049 t.tv_usec = (timeout%1000)*1000;
6051 comm_timer_set(xfr->task_probe->timer, &t);
6056 /** callback for task_probe timer */
6058 auth_xfer_probe_timer_callback(void* arg)
6060 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6061 struct module_env* env;
6062 log_assert(xfr->task_probe);
6063 lock_basic_lock(&xfr->lock);
6064 env = xfr->task_probe->env;
6065 if(env->outnet->want_to_quit) {
6066 lock_basic_unlock(&xfr->lock);
6067 return; /* stop on quit */
6070 if(verbosity >= VERB_ALGO) {
6072 dname_str(xfr->name, zname);
6073 verbose(VERB_ALGO, "auth zone %s soa probe timeout", zname);
6075 if(xfr->task_probe->timeout <= AUTH_PROBE_TIMEOUT_STOP) {
6076 /* try again with bigger timeout */
6077 if(xfr_probe_send_probe(xfr, env, xfr->task_probe->timeout*2)) {
6078 lock_basic_unlock(&xfr->lock);
6082 /* delete commpoint so a new one is created, with a fresh port nr */
6083 comm_point_delete(xfr->task_probe->cp);
6084 xfr->task_probe->cp = NULL;
6086 /* too many timeouts (or fail to send), move to next or end */
6087 xfr_probe_nextmaster(xfr);
6088 xfr_probe_send_or_end(xfr, env);
6091 /** callback for task_probe udp packets */
6093 auth_xfer_probe_udp_callback(struct comm_point* c, void* arg, int err,
6094 struct comm_reply* repinfo)
6096 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6097 struct module_env* env;
6098 log_assert(xfr->task_probe);
6099 lock_basic_lock(&xfr->lock);
6100 env = xfr->task_probe->env;
6101 if(env->outnet->want_to_quit) {
6102 lock_basic_unlock(&xfr->lock);
6103 return 0; /* stop on quit */
6106 /* the comm_point_udp_callback is in a for loop for NUM_UDP_PER_SELECT
6107 * and we set rep.c=NULL to stop if from looking inside the commpoint*/
6109 /* stop the timer */
6110 comm_timer_disable(xfr->task_probe->timer);
6112 /* see if we got a packet and what that means */
6113 if(err == NETEVENT_NOERROR) {
6114 uint32_t serial = 0;
6115 if(check_packet_ok(c->buffer, LDNS_RR_TYPE_SOA, xfr,
6117 /* successful lookup */
6118 if(verbosity >= VERB_ALGO) {
6120 dname_str(xfr->name, buf);
6121 verbose(VERB_ALGO, "auth zone %s: soa probe "
6122 "serial is %u", buf, (unsigned)serial);
6124 /* see if this serial indicates that the zone has
6126 if(xfr_serial_means_update(xfr, serial)) {
6127 /* if updated, start the transfer task, if needed */
6128 verbose(VERB_ALGO, "auth_zone updated, start transfer");
6129 if(xfr->task_transfer->worker == NULL) {
6130 struct auth_master* master =
6131 xfr_probe_current_master(xfr);
6132 /* if we have download URLs use them
6133 * in preference to this master we
6134 * just probed the SOA from */
6135 if(xfr->task_transfer->masters &&
6136 xfr->task_transfer->masters->http)
6138 xfr_probe_disown(xfr);
6139 xfr_start_transfer(xfr, env, master);
6143 /* other tasks are running, we don't do this anymore */
6144 xfr_probe_disown(xfr);
6145 lock_basic_unlock(&xfr->lock);
6146 /* return, we don't sent a reply to this udp packet,
6147 * and we setup the tasks to do next */
6150 verbose(VERB_ALGO, "auth_zone master reports unchanged soa serial");
6151 /* we if cannot find updates amongst the
6152 * masters, this means we then have a new lease
6154 xfr->task_probe->have_new_lease = 1;
6157 if(verbosity >= VERB_ALGO) {
6159 dname_str(xfr->name, buf);
6160 verbose(VERB_ALGO, "auth zone %s: bad reply to soa probe", buf);
6164 if(verbosity >= VERB_ALGO) {
6166 dname_str(xfr->name, buf);
6167 verbose(VERB_ALGO, "auth zone %s: soa probe failed", buf);
6171 /* failed lookup or not an update */
6172 /* delete commpoint so a new one is created, with a fresh port nr */
6173 comm_point_delete(xfr->task_probe->cp);
6174 xfr->task_probe->cp = NULL;
6176 /* if the result was not a successfull probe, we need
6177 * to send the next one */
6178 xfr_probe_nextmaster(xfr);
6179 xfr_probe_send_or_end(xfr, env);
6183 /** lookup a host name for its addresses, if needed */
6185 xfr_probe_lookup_host(struct auth_xfer* xfr, struct module_env* env)
6187 struct sockaddr_storage addr;
6188 socklen_t addrlen = 0;
6189 struct auth_master* master = xfr->task_probe->lookup_target;
6190 struct query_info qinfo;
6191 uint16_t qflags = BIT_RD;
6192 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
6193 struct edns_data edns;
6194 sldns_buffer* buf = env->scratch_buffer;
6195 if(!master) return 0;
6196 if(extstrtoaddr(master->host, &addr, &addrlen)) {
6197 /* not needed, host is in IP addr format */
6200 if(master->allow_notify && !master->http &&
6201 strchr(master->host, '/') != NULL &&
6202 strchr(master->host, '/') == strrchr(master->host, '/')) {
6203 return 0; /* is IP/prefix format, not something to look up */
6206 /* use mesh_new_callback to probe for non-addr hosts,
6207 * and then wait for them to be looked up (in cache, or query) */
6208 qinfo.qname_len = sizeof(dname);
6209 if(sldns_str2wire_dname_buf(master->host, dname, &qinfo.qname_len)
6211 log_err("cannot parse host name of master %s", master->host);
6214 qinfo.qname = dname;
6215 qinfo.qclass = xfr->dclass;
6216 qinfo.qtype = LDNS_RR_TYPE_A;
6217 if(xfr->task_probe->lookup_aaaa)
6218 qinfo.qtype = LDNS_RR_TYPE_AAAA;
6219 qinfo.local_alias = NULL;
6220 if(verbosity >= VERB_ALGO) {
6222 char buf2[LDNS_MAX_DOMAINLEN+1];
6223 dname_str(xfr->name, buf2);
6224 snprintf(buf1, sizeof(buf1), "auth zone %s: master lookup"
6225 " for task_probe", buf2);
6226 log_query_info(VERB_ALGO, buf1, &qinfo);
6228 edns.edns_present = 1;
6230 edns.edns_version = 0;
6231 edns.bits = EDNS_DO;
6232 edns.opt_list = NULL;
6233 if(sldns_buffer_capacity(buf) < 65535)
6234 edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
6235 else edns.udp_size = 65535;
6237 /* unlock xfr during mesh_new_callback() because the callback can be
6238 * called straight away */
6239 lock_basic_unlock(&xfr->lock);
6240 if(!mesh_new_callback(env->mesh, &qinfo, qflags, &edns, buf, 0,
6241 &auth_xfer_probe_lookup_callback, xfr)) {
6242 lock_basic_lock(&xfr->lock);
6243 log_err("out of memory lookup up master %s", master->host);
6246 lock_basic_lock(&xfr->lock);
6250 /** move to sending the probe packets, next if fails. task_probe */
6252 xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
6254 /* are we doing hostname lookups? */
6255 while(xfr->task_probe->lookup_target) {
6256 if(xfr_probe_lookup_host(xfr, env)) {
6257 /* wait for lookup to finish,
6258 * note that the hostname may be in unbound's cache
6259 * and we may then get an instant cache response,
6260 * and that calls the callback just like a full
6261 * lookup and lookup failures also call callback */
6262 if(verbosity >= VERB_ALGO) {
6264 dname_str(xfr->name, zname);
6265 verbose(VERB_ALGO, "auth zone %s probe next target lookup", zname);
6267 lock_basic_unlock(&xfr->lock);
6270 xfr_probe_move_to_next_lookup(xfr, env);
6272 /* probe of list has ended. Create or refresh the list of of
6273 * allow_notify addrs */
6274 probe_copy_masters_for_allow_notify(xfr);
6275 if(verbosity >= VERB_ALGO) {
6277 dname_str(xfr->name, zname);
6278 verbose(VERB_ALGO, "auth zone %s probe: notify addrs updated", zname);
6280 if(xfr->task_probe->only_lookup) {
6281 /* only wanted lookups for copy, stop probe and start wait */
6282 xfr->task_probe->only_lookup = 0;
6283 if(verbosity >= VERB_ALGO) {
6285 dname_str(xfr->name, zname);
6286 verbose(VERB_ALGO, "auth zone %s probe: finished only_lookup", zname);
6288 xfr_probe_disown(xfr);
6289 if(xfr->task_nextprobe->worker == NULL)
6290 xfr_set_timeout(xfr, env, 0, 0);
6291 lock_basic_unlock(&xfr->lock);
6295 /* send probe packets */
6296 while(!xfr_probe_end_of_list(xfr)) {
6297 if(xfr_probe_send_probe(xfr, env, AUTH_PROBE_TIMEOUT)) {
6298 /* successfully sent probe, wait for callback */
6299 lock_basic_unlock(&xfr->lock);
6302 /* failed to send probe, next master */
6303 xfr_probe_nextmaster(xfr);
6306 /* done with probe sequence, wait */
6307 if(xfr->task_probe->have_new_lease) {
6308 /* if zone not updated, start the wait timer again */
6309 if(verbosity >= VERB_ALGO) {
6311 dname_str(xfr->name, zname);
6312 verbose(VERB_ALGO, "auth_zone %s unchanged, new lease, wait", zname);
6314 xfr_probe_disown(xfr);
6316 xfr->lease_time = *env->now;
6317 if(xfr->task_nextprobe->worker == NULL)
6318 xfr_set_timeout(xfr, env, 0, 0);
6320 if(verbosity >= VERB_ALGO) {
6322 dname_str(xfr->name, zname);
6323 verbose(VERB_ALGO, "auth zone %s soa probe failed, wait to retry", zname);
6325 /* we failed to send this as well, move to the wait task,
6326 * use the shorter retry timeout */
6327 xfr_probe_disown(xfr);
6328 /* pick up the nextprobe task and wait */
6329 if(xfr->task_nextprobe->worker == NULL)
6330 xfr_set_timeout(xfr, env, 1, 0);
6333 lock_basic_unlock(&xfr->lock);
6336 /** callback for task_probe lookup of host name, of A or AAAA */
6337 void auth_xfer_probe_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
6338 enum sec_status ATTR_UNUSED(sec), char* ATTR_UNUSED(why_bogus),
6339 int ATTR_UNUSED(was_ratelimited))
6341 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6342 struct module_env* env;
6343 log_assert(xfr->task_probe);
6344 lock_basic_lock(&xfr->lock);
6345 env = xfr->task_probe->env;
6346 if(env->outnet->want_to_quit) {
6347 lock_basic_unlock(&xfr->lock);
6348 return; /* stop on quit */
6351 /* process result */
6352 if(rcode == LDNS_RCODE_NOERROR) {
6353 uint16_t wanted_qtype = LDNS_RR_TYPE_A;
6354 struct regional* temp = env->scratch;
6355 struct query_info rq;
6356 struct reply_info* rep;
6357 if(xfr->task_probe->lookup_aaaa)
6358 wanted_qtype = LDNS_RR_TYPE_AAAA;
6359 memset(&rq, 0, sizeof(rq));
6360 rep = parse_reply_in_temp_region(buf, temp, &rq);
6361 if(rep && rq.qtype == wanted_qtype &&
6362 FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_NOERROR) {
6363 /* parsed successfully */
6364 struct ub_packed_rrset_key* answer =
6365 reply_find_answer_rrset(&rq, rep);
6367 xfr_master_add_addrs(xfr->task_probe->
6368 lookup_target, answer, wanted_qtype);
6370 if(verbosity >= VERB_ALGO) {
6372 dname_str(xfr->name, zname);
6373 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"));
6377 if(verbosity >= VERB_ALGO) {
6379 dname_str(xfr->name, zname);
6380 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"));
6384 if(verbosity >= VERB_ALGO) {
6386 dname_str(xfr->name, zname);
6387 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"));
6390 if(xfr->task_probe->lookup_target->list &&
6391 xfr->task_probe->lookup_target == xfr_probe_current_master(xfr))
6392 xfr->task_probe->scan_addr = xfr->task_probe->lookup_target->list;
6394 /* move to lookup AAAA after A lookup, move to next hostname lookup,
6395 * or move to send the probes, or, if nothing to do, end task_probe */
6396 xfr_probe_move_to_next_lookup(xfr, env);
6397 xfr_probe_send_or_end(xfr, env);
6400 /** disown task_nextprobe. caller must hold xfr.lock */
6402 xfr_nextprobe_disown(struct auth_xfer* xfr)
6404 /* delete the timer, because the next worker to pick this up may
6405 * not have the same event base */
6406 comm_timer_delete(xfr->task_nextprobe->timer);
6407 xfr->task_nextprobe->timer = NULL;
6408 xfr->task_nextprobe->next_probe = 0;
6409 /* we don't own this item anymore */
6410 xfr->task_nextprobe->worker = NULL;
6411 xfr->task_nextprobe->env = NULL;
6414 /** xfer nextprobe timeout callback, this is part of task_nextprobe */
6416 auth_xfer_timer(void* arg)
6418 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6419 struct module_env* env;
6420 log_assert(xfr->task_nextprobe);
6421 lock_basic_lock(&xfr->lock);
6422 env = xfr->task_nextprobe->env;
6423 if(env->outnet->want_to_quit) {
6424 lock_basic_unlock(&xfr->lock);
6425 return; /* stop on quit */
6428 /* see if zone has expired, and if so, also set auth_zone expired */
6429 if(xfr->have_zone && !xfr->zone_expired &&
6430 *env->now >= xfr->lease_time + xfr->expiry) {
6431 lock_basic_unlock(&xfr->lock);
6432 auth_xfer_set_expired(xfr, env, 1);
6433 lock_basic_lock(&xfr->lock);
6436 xfr_nextprobe_disown(xfr);
6438 if(!xfr_start_probe(xfr, env, NULL)) {
6439 /* not started because already in progress */
6440 lock_basic_unlock(&xfr->lock);
6444 /** return true if there are probe (SOA UDP query) targets in the master list*/
6446 have_probe_targets(struct auth_master* list)
6448 struct auth_master* p;
6449 for(p=list; p; p = p->next) {
6450 if(!p->allow_notify && p->host)
6456 /** start task_probe if possible, if no masters for probe start task_transfer
6457 * returns true if task has been started, and false if the task is already
6460 xfr_start_probe(struct auth_xfer* xfr, struct module_env* env,
6461 struct auth_master* spec)
6463 /* see if we need to start a probe (or maybe it is already in
6464 * progress (due to notify)) */
6465 if(xfr->task_probe->worker == NULL) {
6466 if(!have_probe_targets(xfr->task_probe->masters) &&
6467 !(xfr->task_probe->only_lookup &&
6468 xfr->task_probe->masters != NULL)) {
6469 /* useless to pick up task_probe, no masters to
6470 * probe. Instead attempt to pick up task transfer */
6471 if(xfr->task_transfer->worker == NULL) {
6472 xfr_start_transfer(xfr, env, spec);
6475 /* task transfer already in progress */
6479 /* pick up the probe task ourselves */
6480 xfr->task_probe->worker = env->worker;
6481 xfr->task_probe->env = env;
6482 xfr->task_probe->cp = NULL;
6484 /* start the task */
6485 /* have not seen a new lease yet, this scan */
6486 xfr->task_probe->have_new_lease = 0;
6487 /* if this was a timeout, no specific first master to scan */
6488 /* otherwise, spec is nonNULL the notified master, scan
6489 * first and also transfer first from it */
6490 xfr_probe_start_list(xfr, spec);
6491 /* setup to start the lookup of hostnames of masters afresh */
6492 xfr_probe_start_lookups(xfr);
6493 /* send the probe packet or next send, or end task */
6494 xfr_probe_send_or_end(xfr, env);
6500 /** for task_nextprobe.
6501 * determine next timeout for auth_xfer. Also (re)sets timer.
6502 * @param xfr: task structure
6503 * @param env: module environment, with worker and time.
6504 * @param failure: set true if timer should be set for failure retry.
6505 * @param lookup_only: only perform lookups when timer done, 0 sec timeout
6508 xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
6509 int failure, int lookup_only)
6512 log_assert(xfr->task_nextprobe != NULL);
6513 log_assert(xfr->task_nextprobe->worker == NULL ||
6514 xfr->task_nextprobe->worker == env->worker);
6515 /* normally, nextprobe = startoflease + refresh,
6516 * but if expiry is sooner, use that one.
6517 * after a failure, use the retry timer instead. */
6518 xfr->task_nextprobe->next_probe = *env->now;
6519 if(xfr->lease_time && !failure)
6520 xfr->task_nextprobe->next_probe = xfr->lease_time;
6523 xfr->task_nextprobe->backoff = 0;
6525 if(xfr->task_nextprobe->backoff == 0)
6526 xfr->task_nextprobe->backoff = 3;
6527 else xfr->task_nextprobe->backoff *= 2;
6528 if(xfr->task_nextprobe->backoff > AUTH_TRANSFER_MAX_BACKOFF)
6529 xfr->task_nextprobe->backoff =
6530 AUTH_TRANSFER_MAX_BACKOFF;
6533 if(xfr->have_zone) {
6534 time_t wait = xfr->refresh;
6535 if(failure) wait = xfr->retry;
6536 if(xfr->expiry < wait)
6537 xfr->task_nextprobe->next_probe += xfr->expiry;
6538 else xfr->task_nextprobe->next_probe += wait;
6540 xfr->task_nextprobe->next_probe +=
6541 xfr->task_nextprobe->backoff;
6542 /* put the timer exactly on expiry, if possible */
6543 if(xfr->lease_time && xfr->lease_time+xfr->expiry <
6544 xfr->task_nextprobe->next_probe &&
6545 xfr->lease_time+xfr->expiry > *env->now)
6546 xfr->task_nextprobe->next_probe =
6547 xfr->lease_time+xfr->expiry;
6549 xfr->task_nextprobe->next_probe +=
6550 xfr->task_nextprobe->backoff;
6553 if(!xfr->task_nextprobe->timer) {
6554 xfr->task_nextprobe->timer = comm_timer_create(
6555 env->worker_base, auth_xfer_timer, xfr);
6556 if(!xfr->task_nextprobe->timer) {
6557 /* failed to malloc memory. likely zone transfer
6558 * also fails for that. skip the timeout */
6560 dname_str(xfr->name, zname);
6561 log_err("cannot allocate timer, no refresh for %s",
6566 xfr->task_nextprobe->worker = env->worker;
6567 xfr->task_nextprobe->env = env;
6568 if(*(xfr->task_nextprobe->env->now) <= xfr->task_nextprobe->next_probe)
6569 tv.tv_sec = xfr->task_nextprobe->next_probe -
6570 *(xfr->task_nextprobe->env->now);
6572 if(tv.tv_sec != 0 && lookup_only && xfr->task_probe->masters) {
6573 /* don't lookup_only, if lookup timeout is 0 anyway,
6574 * or if we don't have masters to lookup */
6576 if(xfr->task_probe->worker == NULL)
6577 xfr->task_probe->only_lookup = 1;
6579 if(verbosity >= VERB_ALGO) {
6581 dname_str(xfr->name, zname);
6582 verbose(VERB_ALGO, "auth zone %s timeout in %d seconds",
6583 zname, (int)tv.tv_sec);
6586 comm_timer_set(xfr->task_nextprobe->timer, &tv);
6589 /** initial pick up of worker timeouts, ties events to worker event loop */
6591 auth_xfer_pickup_initial(struct auth_zones* az, struct module_env* env)
6593 struct auth_xfer* x;
6594 lock_rw_wrlock(&az->lock);
6595 RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
6596 lock_basic_lock(&x->lock);
6597 /* set lease_time, because we now have timestamp in env,
6598 * (not earlier during startup and apply_cfg), and this
6599 * notes the start time when the data was acquired */
6601 x->lease_time = *env->now;
6602 if(x->task_nextprobe && x->task_nextprobe->worker == NULL) {
6603 xfr_set_timeout(x, env, 0, 1);
6605 lock_basic_unlock(&x->lock);
6607 lock_rw_unlock(&az->lock);
6610 void auth_zones_cleanup(struct auth_zones* az)
6612 struct auth_xfer* x;
6613 lock_rw_wrlock(&az->lock);
6614 RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
6615 lock_basic_lock(&x->lock);
6616 if(x->task_nextprobe && x->task_nextprobe->worker != NULL) {
6617 xfr_nextprobe_disown(x);
6619 if(x->task_probe && x->task_probe->worker != NULL) {
6620 xfr_probe_disown(x);
6622 if(x->task_transfer && x->task_transfer->worker != NULL) {
6623 auth_chunks_delete(x->task_transfer);
6624 xfr_transfer_disown(x);
6626 lock_basic_unlock(&x->lock);
6628 lock_rw_unlock(&az->lock);
6632 * malloc the xfer and tasks
6633 * @param z: auth_zone with name of zone.
6635 static struct auth_xfer*
6636 auth_xfer_new(struct auth_zone* z)
6638 struct auth_xfer* xfr;
6639 xfr = (struct auth_xfer*)calloc(1, sizeof(*xfr));
6640 if(!xfr) return NULL;
6641 xfr->name = memdup(z->name, z->namelen);
6646 xfr->node.key = xfr;
6647 xfr->namelen = z->namelen;
6648 xfr->namelabs = z->namelabs;
6649 xfr->dclass = z->dclass;
6651 xfr->task_nextprobe = (struct auth_nextprobe*)calloc(1,
6652 sizeof(struct auth_nextprobe));
6653 if(!xfr->task_nextprobe) {
6658 xfr->task_probe = (struct auth_probe*)calloc(1,
6659 sizeof(struct auth_probe));
6660 if(!xfr->task_probe) {
6661 free(xfr->task_nextprobe);
6666 xfr->task_transfer = (struct auth_transfer*)calloc(1,
6667 sizeof(struct auth_transfer));
6668 if(!xfr->task_transfer) {
6669 free(xfr->task_probe);
6670 free(xfr->task_nextprobe);
6676 lock_basic_init(&xfr->lock);
6677 lock_protect(&xfr->lock, &xfr->name, sizeof(xfr->name));
6678 lock_protect(&xfr->lock, &xfr->namelen, sizeof(xfr->namelen));
6679 lock_protect(&xfr->lock, xfr->name, xfr->namelen);
6680 lock_protect(&xfr->lock, &xfr->namelabs, sizeof(xfr->namelabs));
6681 lock_protect(&xfr->lock, &xfr->dclass, sizeof(xfr->dclass));
6682 lock_protect(&xfr->lock, &xfr->notify_received, sizeof(xfr->notify_received));
6683 lock_protect(&xfr->lock, &xfr->notify_serial, sizeof(xfr->notify_serial));
6684 lock_protect(&xfr->lock, &xfr->zone_expired, sizeof(xfr->zone_expired));
6685 lock_protect(&xfr->lock, &xfr->have_zone, sizeof(xfr->have_zone));
6686 lock_protect(&xfr->lock, &xfr->serial, sizeof(xfr->serial));
6687 lock_protect(&xfr->lock, &xfr->retry, sizeof(xfr->retry));
6688 lock_protect(&xfr->lock, &xfr->refresh, sizeof(xfr->refresh));
6689 lock_protect(&xfr->lock, &xfr->expiry, sizeof(xfr->expiry));
6690 lock_protect(&xfr->lock, &xfr->lease_time, sizeof(xfr->lease_time));
6691 lock_protect(&xfr->lock, &xfr->task_nextprobe->worker,
6692 sizeof(xfr->task_nextprobe->worker));
6693 lock_protect(&xfr->lock, &xfr->task_probe->worker,
6694 sizeof(xfr->task_probe->worker));
6695 lock_protect(&xfr->lock, &xfr->task_transfer->worker,
6696 sizeof(xfr->task_transfer->worker));
6697 lock_basic_lock(&xfr->lock);
6701 /** Create auth_xfer structure.
6702 * This populates the have_zone, soa values, and so on times.
6703 * and sets the timeout, if a zone transfer is needed a short timeout is set.
6704 * For that the auth_zone itself must exist (and read in zonefile)
6705 * returns false on alloc failure. */
6707 auth_xfer_create(struct auth_zones* az, struct auth_zone* z)
6709 struct auth_xfer* xfr;
6712 xfr = auth_xfer_new(z);
6714 log_err("malloc failure");
6717 /* insert in tree */
6718 (void)rbtree_insert(&az->xtree, &xfr->node);
6722 /** create new auth_master structure */
6723 static struct auth_master*
6724 auth_master_new(struct auth_master*** list)
6726 struct auth_master *m;
6727 m = (struct auth_master*)calloc(1, sizeof(*m));
6729 log_err("malloc failure");
6732 /* set first pointer to m, or next pointer of previous element to m */
6734 /* store m's next pointer as future point to store at */
6735 (*list) = &(m->next);
6739 /** dup_prefix : create string from initial part of other string, malloced */
6741 dup_prefix(char* str, size_t num)
6744 size_t len = strlen(str);
6745 if(len < num) num = len; /* not more than strlen */
6746 result = (char*)malloc(num+1);
6748 log_err("malloc failure");
6751 memmove(result, str, num);
6756 /** dup string and print error on error */
6760 char* result = strdup(str);
6762 log_err("malloc failure");
6768 /** find first of two characters */
6770 str_find_first_of_chars(char* s, char a, char b)
6772 char* ra = strchr(s, a);
6773 char* rb = strchr(s, b);
6776 if(ra < rb) return ra;
6780 /** parse URL into host and file parts, false on malloc or parse error */
6782 parse_url(char* url, char** host, char** file, int* port, int* ssl)
6785 /* parse http://www.example.com/file.htm
6786 * or http://127.0.0.1 (index.html)
6787 * or https://[::1@1234]/a/b/c/d */
6789 *port = AUTH_HTTPS_PORT;
6791 /* parse http:// or https:// */
6792 if(strncmp(p, "http://", 7) == 0) {
6795 *port = AUTH_HTTP_PORT;
6796 } else if(strncmp(p, "https://", 8) == 0) {
6798 } else if(strstr(p, "://") && strchr(p, '/') > strstr(p, "://") &&
6799 strchr(p, ':') >= strstr(p, "://")) {
6800 char* uri = dup_prefix(p, (size_t)(strstr(p, "://")-p));
6801 log_err("protocol %s:// not supported (for url %s)",
6807 /* parse hostname part */
6809 char* end = strchr(p, ']');
6810 p++; /* skip over [ */
6812 *host = dup_prefix(p, (size_t)(end-p));
6813 if(!*host) return 0;
6814 p = end+1; /* skip over ] */
6817 if(!*host) return 0;
6821 char* end = str_find_first_of_chars(p, ':', '/');
6823 *host = dup_prefix(p, (size_t)(end-p));
6824 if(!*host) return 0;
6827 if(!*host) return 0;
6829 p = end; /* at next : or / or NULL */
6832 /* parse port number */
6833 if(p && p[0] == ':') {
6835 *port = strtol(p+1, &end, 10);
6839 /* parse filename part */
6840 while(p && *p == '/')
6843 *file = strdup("index.html");
6844 else *file = strdup(p);
6846 log_err("malloc failure");
6853 xfer_set_masters(struct auth_master** list, struct config_auth* c,
6856 struct auth_master* m;
6857 struct config_strlist* p;
6858 /* list points to the first, or next pointer for the new element */
6860 list = &( (*list)->next );
6863 for(p = c->urls; p; p = p->next) {
6864 m = auth_master_new(&list);
6866 if(!parse_url(p->str, &m->host, &m->file, &m->port, &m->ssl))
6869 for(p = c->masters; p; p = p->next) {
6870 m = auth_master_new(&list);
6871 m->ixfr = 1; /* this flag is not configurable */
6872 m->host = strdup(p->str);
6874 log_err("malloc failure");
6878 for(p = c->allow_notify; p; p = p->next) {
6879 m = auth_master_new(&list);
6880 m->allow_notify = 1;
6881 m->host = strdup(p->str);
6883 log_err("malloc failure");
6890 #define SERIAL_BITS 32
6892 compare_serial(uint32_t a, uint32_t b)
6894 const uint32_t cutoff = ((uint32_t) 1 << (SERIAL_BITS - 1));
6898 } else if ((a < b && b - a < cutoff) || (a > b && a - b > cutoff)) {