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
92 /** pick up nextprobe task to start waiting to perform transfer actions */
93 static void xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
94 int failure, int lookup_only);
95 /** move to sending the probe packets, next if fails. task_probe */
96 static void xfr_probe_send_or_end(struct auth_xfer* xfr,
97 struct module_env* env);
98 /** pick up probe task with specified(or NULL) destination first,
99 * or transfer task if nothing to probe, or false if already in progress */
100 static int xfr_start_probe(struct auth_xfer* xfr, struct module_env* env,
101 struct auth_master* spec);
102 /** delete xfer structure (not its tree entry) */
103 static void auth_xfer_delete(struct auth_xfer* xfr);
105 /** create new dns_msg */
106 static struct dns_msg*
107 msg_create(struct regional* region, struct query_info* qinfo)
109 struct dns_msg* msg = (struct dns_msg*)regional_alloc(region,
110 sizeof(struct dns_msg));
113 msg->qinfo.qname = regional_alloc_init(region, qinfo->qname,
115 if(!msg->qinfo.qname)
117 msg->qinfo.qname_len = qinfo->qname_len;
118 msg->qinfo.qtype = qinfo->qtype;
119 msg->qinfo.qclass = qinfo->qclass;
120 msg->qinfo.local_alias = NULL;
121 /* non-packed reply_info, because it needs to grow the array */
122 msg->rep = (struct reply_info*)regional_alloc_zero(region,
123 sizeof(struct reply_info)-sizeof(struct rrset_ref));
126 msg->rep->flags = (uint16_t)(BIT_QR | BIT_AA);
127 msg->rep->authoritative = 1;
128 msg->rep->qdcount = 1;
129 /* rrsets is NULL, no rrsets yet */
133 /** grow rrset array by one in msg */
135 msg_grow_array(struct regional* region, struct dns_msg* msg)
137 if(msg->rep->rrsets == NULL) {
138 msg->rep->rrsets = regional_alloc_zero(region,
139 sizeof(struct ub_packed_rrset_key*)*(msg->rep->rrset_count+1));
140 if(!msg->rep->rrsets)
143 struct ub_packed_rrset_key** rrsets_old = msg->rep->rrsets;
144 msg->rep->rrsets = regional_alloc_zero(region,
145 sizeof(struct ub_packed_rrset_key*)*(msg->rep->rrset_count+1));
146 if(!msg->rep->rrsets)
148 memmove(msg->rep->rrsets, rrsets_old,
149 sizeof(struct ub_packed_rrset_key*)*msg->rep->rrset_count);
154 /** get ttl of rrset */
156 get_rrset_ttl(struct ub_packed_rrset_key* k)
158 struct packed_rrset_data* d = (struct packed_rrset_data*)
163 /** Copy rrset into region from domain-datanode and packet rrset */
164 static struct ub_packed_rrset_key*
165 auth_packed_rrset_copy_region(struct auth_zone* z, struct auth_data* node,
166 struct auth_rrset* rrset, struct regional* region, time_t adjust)
168 struct ub_packed_rrset_key key;
169 memset(&key, 0, sizeof(key));
170 key.entry.key = &key;
171 key.entry.data = rrset->data;
172 key.rk.dname = node->name;
173 key.rk.dname_len = node->namelen;
174 key.rk.type = htons(rrset->type);
175 key.rk.rrset_class = htons(z->dclass);
176 key.entry.hash = rrset_key_hash(&key.rk);
177 return packed_rrset_copy_region(&key, region, adjust);
180 /** fix up msg->rep TTL and prefetch ttl */
182 msg_ttl(struct dns_msg* msg)
184 if(msg->rep->rrset_count == 0) return;
185 if(msg->rep->rrset_count == 1) {
186 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[0]);
187 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
188 } else if(get_rrset_ttl(msg->rep->rrsets[msg->rep->rrset_count-1]) <
190 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[
191 msg->rep->rrset_count-1]);
192 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
196 /** see if rrset is a duplicate in the answer message */
198 msg_rrset_duplicate(struct dns_msg* msg, uint8_t* nm, size_t nmlen,
199 uint16_t type, uint16_t dclass)
202 for(i=0; i<msg->rep->rrset_count; i++) {
203 struct ub_packed_rrset_key* k = msg->rep->rrsets[i];
204 if(ntohs(k->rk.type) == type && k->rk.dname_len == nmlen &&
205 ntohs(k->rk.rrset_class) == dclass &&
206 query_dname_compare(k->rk.dname, nm) == 0)
212 /** add rrset to answer section (no auth, add rrsets yet) */
214 msg_add_rrset_an(struct auth_zone* z, struct regional* region,
215 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
217 log_assert(msg->rep->ns_numrrsets == 0);
218 log_assert(msg->rep->ar_numrrsets == 0);
221 if(msg_rrset_duplicate(msg, node->name, node->namelen, rrset->type,
225 if(!msg_grow_array(region, msg))
228 if(!(msg->rep->rrsets[msg->rep->rrset_count] =
229 auth_packed_rrset_copy_region(z, node, rrset, region, 0)))
231 msg->rep->rrset_count++;
232 msg->rep->an_numrrsets++;
237 /** add rrset to authority section (no additonal section rrsets yet) */
239 msg_add_rrset_ns(struct auth_zone* z, struct regional* region,
240 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
242 log_assert(msg->rep->ar_numrrsets == 0);
245 if(msg_rrset_duplicate(msg, node->name, node->namelen, rrset->type,
249 if(!msg_grow_array(region, msg))
252 if(!(msg->rep->rrsets[msg->rep->rrset_count] =
253 auth_packed_rrset_copy_region(z, node, rrset, region, 0)))
255 msg->rep->rrset_count++;
256 msg->rep->ns_numrrsets++;
261 /** add rrset to additional section */
263 msg_add_rrset_ar(struct auth_zone* z, struct regional* region,
264 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
268 if(msg_rrset_duplicate(msg, node->name, node->namelen, rrset->type,
272 if(!msg_grow_array(region, msg))
275 if(!(msg->rep->rrsets[msg->rep->rrset_count] =
276 auth_packed_rrset_copy_region(z, node, rrset, region, 0)))
278 msg->rep->rrset_count++;
279 msg->rep->ar_numrrsets++;
284 struct auth_zones* auth_zones_create(void)
286 struct auth_zones* az = (struct auth_zones*)calloc(1, sizeof(*az));
288 log_err("out of memory");
291 rbtree_init(&az->ztree, &auth_zone_cmp);
292 rbtree_init(&az->xtree, &auth_xfer_cmp);
293 lock_rw_init(&az->lock);
294 lock_protect(&az->lock, &az->ztree, sizeof(az->ztree));
295 lock_protect(&az->lock, &az->xtree, sizeof(az->xtree));
296 /* also lock protects the rbnode's in struct auth_zone, auth_xfer */
300 int auth_zone_cmp(const void* z1, const void* z2)
302 /* first sort on class, so that hierarchy can be maintained within
304 struct auth_zone* a = (struct auth_zone*)z1;
305 struct auth_zone* b = (struct auth_zone*)z2;
307 if(a->dclass != b->dclass) {
308 if(a->dclass < b->dclass)
312 /* sorted such that higher zones sort before lower zones (their
314 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
317 int auth_data_cmp(const void* z1, const void* z2)
319 struct auth_data* a = (struct auth_data*)z1;
320 struct auth_data* b = (struct auth_data*)z2;
322 /* canonical sort, because DNSSEC needs that */
323 return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
327 int auth_xfer_cmp(const void* z1, const void* z2)
329 /* first sort on class, so that hierarchy can be maintained within
331 struct auth_xfer* a = (struct auth_xfer*)z1;
332 struct auth_xfer* b = (struct auth_xfer*)z2;
334 if(a->dclass != b->dclass) {
335 if(a->dclass < b->dclass)
339 /* sorted such that higher zones sort before lower zones (their
341 return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
344 /** delete auth rrset node */
346 auth_rrset_delete(struct auth_rrset* rrset)
353 /** delete auth data domain node */
355 auth_data_delete(struct auth_data* n)
357 struct auth_rrset* p, *np;
362 auth_rrset_delete(p);
369 /** helper traverse to delete zones */
371 auth_data_del(rbnode_type* n, void* ATTR_UNUSED(arg))
373 struct auth_data* z = (struct auth_data*)n->key;
377 /** delete an auth zone structure (tree remove must be done elsewhere) */
379 auth_zone_delete(struct auth_zone* z)
382 lock_rw_destroy(&z->lock);
383 traverse_postorder(&z->data, auth_data_del, NULL);
390 auth_zone_create(struct auth_zones* az, uint8_t* nm, size_t nmlen,
393 struct auth_zone* z = (struct auth_zone*)calloc(1, sizeof(*z));
400 z->namelabs = dname_count_labels(nm);
401 z->name = memdup(nm, nmlen);
406 rbtree_init(&z->data, &auth_data_cmp);
407 lock_rw_init(&z->lock);
408 lock_protect(&z->lock, &z->name, sizeof(*z)-sizeof(rbnode_type));
409 lock_rw_wrlock(&z->lock);
410 /* z lock protects all, except rbtree itself, which is az->lock */
411 if(!rbtree_insert(&az->ztree, &z->node)) {
412 lock_rw_unlock(&z->lock);
414 log_warn("duplicate auth zone");
421 auth_zone_find(struct auth_zones* az, uint8_t* nm, size_t nmlen,
424 struct auth_zone key;
429 key.namelabs = dname_count_labels(nm);
430 return (struct auth_zone*)rbtree_search(&az->ztree, &key);
434 auth_xfer_find(struct auth_zones* az, uint8_t* nm, size_t nmlen,
437 struct auth_xfer key;
442 key.namelabs = dname_count_labels(nm);
443 return (struct auth_xfer*)rbtree_search(&az->xtree, &key);
446 /** find an auth zone or sorted less-or-equal, return true if exact */
448 auth_zone_find_less_equal(struct auth_zones* az, uint8_t* nm, size_t nmlen,
449 uint16_t dclass, struct auth_zone** z)
451 struct auth_zone key;
456 key.namelabs = dname_count_labels(nm);
457 return rbtree_find_less_equal(&az->ztree, &key, (rbnode_type**)z);
461 /** find the auth zone that is above the given name */
463 auth_zones_find_zone(struct auth_zones* az, uint8_t* name, size_t name_len,
467 size_t nmlen = name_len;
469 if(auth_zone_find_less_equal(az, nm, nmlen, dclass, &z)) {
473 /* less-or-nothing */
474 if(!z) return NULL; /* nothing smaller, nothing above it */
475 /* we found smaller name; smaller may be above the name,
476 * but not below it. */
477 nm = dname_get_shared_topdomain(z->name, name);
478 dname_count_size_labels(nm, &nmlen);
484 z = auth_zone_find(az, nm, nmlen, dclass);
486 if(dname_is_root(nm)) break;
487 dname_remove_label(&nm, &nmlen);
492 /** find or create zone with name str. caller must have lock on az.
493 * returns a wrlocked zone */
494 static struct auth_zone*
495 auth_zones_find_or_add_zone(struct auth_zones* az, char* name)
497 uint8_t nm[LDNS_MAX_DOMAINLEN+1];
498 size_t nmlen = sizeof(nm);
501 if(sldns_str2wire_dname_buf(name, nm, &nmlen) != 0) {
502 log_err("cannot parse auth zone name: %s", name);
505 z = auth_zone_find(az, nm, nmlen, LDNS_RR_CLASS_IN);
507 /* not found, create the zone */
508 z = auth_zone_create(az, nm, nmlen, LDNS_RR_CLASS_IN);
510 lock_rw_wrlock(&z->lock);
515 /** find or create xfer zone with name str. caller must have lock on az.
516 * returns a locked xfer */
517 static struct auth_xfer*
518 auth_zones_find_or_add_xfer(struct auth_zones* az, struct auth_zone* z)
521 x = auth_xfer_find(az, z->name, z->namelen, z->dclass);
523 /* not found, create the zone */
524 x = auth_xfer_create(az, z);
526 lock_basic_lock(&x->lock);
532 auth_zone_set_zonefile(struct auth_zone* z, char* zonefile)
534 if(z->zonefile) free(z->zonefile);
535 if(zonefile == NULL) {
538 z->zonefile = strdup(zonefile);
540 log_err("malloc failure");
547 /** set auth zone fallback. caller must have lock on zone */
549 auth_zone_set_fallback(struct auth_zone* z, char* fallbackstr)
551 if(strcmp(fallbackstr, "yes") != 0 && strcmp(fallbackstr, "no") != 0){
552 log_err("auth zone fallback, expected yes or no, got %s",
556 z->fallback_enabled = (strcmp(fallbackstr, "yes")==0);
560 /** create domain with the given name */
561 static struct auth_data*
562 az_domain_create(struct auth_zone* z, uint8_t* nm, size_t nmlen)
564 struct auth_data* n = (struct auth_data*)malloc(sizeof(*n));
566 memset(n, 0, sizeof(*n));
568 n->name = memdup(nm, nmlen);
574 n->namelabs = dname_count_labels(nm);
575 if(!rbtree_insert(&z->data, &n->node)) {
576 log_warn("duplicate auth domain name");
584 /** find domain with exactly the given name */
585 static struct auth_data*
586 az_find_name(struct auth_zone* z, uint8_t* nm, size_t nmlen)
588 struct auth_zone key;
592 key.namelabs = dname_count_labels(nm);
593 return (struct auth_data*)rbtree_search(&z->data, &key);
596 /** Find domain name (or closest match) */
598 az_find_domain(struct auth_zone* z, struct query_info* qinfo, int* node_exact,
599 struct auth_data** node)
601 struct auth_zone key;
603 key.name = qinfo->qname;
604 key.namelen = qinfo->qname_len;
605 key.namelabs = dname_count_labels(key.name);
606 *node_exact = rbtree_find_less_equal(&z->data, &key,
607 (rbnode_type**)node);
610 /** find or create domain with name in zone */
611 static struct auth_data*
612 az_domain_find_or_create(struct auth_zone* z, uint8_t* dname,
615 struct auth_data* n = az_find_name(z, dname, dname_len);
617 n = az_domain_create(z, dname, dname_len);
622 /** find rrset of given type in the domain */
623 static struct auth_rrset*
624 az_domain_rrset(struct auth_data* n, uint16_t t)
626 struct auth_rrset* rrset;
637 /** remove rrset of this type from domain */
639 domain_remove_rrset(struct auth_data* node, uint16_t rr_type)
641 struct auth_rrset* rrset, *prev;
644 rrset = node->rrsets;
646 if(rrset->type == rr_type) {
647 /* found it, now delete it */
648 if(prev) prev->next = rrset->next;
649 else node->rrsets = rrset->next;
650 auth_rrset_delete(rrset);
658 /** find an rr index in the rrset. returns true if found */
660 az_rrset_find_rr(struct packed_rrset_data* d, uint8_t* rdata, size_t len,
664 for(i=0; i<d->count; i++) {
665 if(d->rr_len[i] != len)
667 if(memcmp(d->rr_data[i], rdata, len) == 0) {
675 /** find an rrsig index in the rrset. returns true if found */
677 az_rrset_find_rrsig(struct packed_rrset_data* d, uint8_t* rdata, size_t len,
681 for(i=d->count; i<d->count + d->rrsig_count; i++) {
682 if(d->rr_len[i] != len)
684 if(memcmp(d->rr_data[i], rdata, len) == 0) {
692 /** see if rdata is duplicate */
694 rdata_duplicate(struct packed_rrset_data* d, uint8_t* rdata, size_t len)
697 for(i=0; i<d->count + d->rrsig_count; i++) {
698 if(d->rr_len[i] != len)
700 if(memcmp(d->rr_data[i], rdata, len) == 0)
706 /** get rrsig type covered from rdata.
707 * @param rdata: rdata in wireformat, starting with 16bit rdlength.
708 * @param rdatalen: length of rdata buffer.
709 * @return type covered (or 0).
712 rrsig_rdata_get_type_covered(uint8_t* rdata, size_t rdatalen)
716 return sldns_read_uint16(rdata+2);
719 /** remove RR from existing RRset. Also sig, if it is a signature.
720 * reallocates the packed rrset for a new one, false on alloc failure */
722 rrset_remove_rr(struct auth_rrset* rrset, size_t index)
724 struct packed_rrset_data* d, *old = rrset->data;
726 if(index >= old->count + old->rrsig_count)
727 return 0; /* index out of bounds */
728 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old) - (
729 sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t) +
730 old->rr_len[index]));
732 log_err("malloc failure");
736 d->count = old->count;
737 d->rrsig_count = old->rrsig_count;
738 if(index < d->count) d->count--;
739 else d->rrsig_count--;
740 d->trust = old->trust;
741 d->security = old->security;
743 /* set rr_len, needed for ptr_fixup */
744 d->rr_len = (size_t*)((uint8_t*)d +
745 sizeof(struct packed_rrset_data));
747 memmove(d->rr_len, old->rr_len, (index)*sizeof(size_t));
748 if(index+1 < old->count+old->rrsig_count)
749 memmove(&d->rr_len[index], &old->rr_len[index+1],
750 (old->count+old->rrsig_count - (index+1))*sizeof(size_t));
751 packed_rrset_ptr_fixup(d);
755 memmove(d->rr_ttl, old->rr_ttl, (index)*sizeof(time_t));
756 if(index+1 < old->count+old->rrsig_count)
757 memmove(&d->rr_ttl[index], &old->rr_ttl[index+1],
758 (old->count+old->rrsig_count - (index+1))*sizeof(time_t));
760 /* move over rr_data */
761 for(i=0; i<d->count+d->rrsig_count; i++) {
763 if(i < index) oldi = i;
765 memmove(d->rr_data[i], old->rr_data[oldi], d->rr_len[i]);
768 /* recalc ttl (lowest of remaining RR ttls) */
769 if(d->count + d->rrsig_count > 0)
770 d->ttl = d->rr_ttl[0];
771 for(i=0; i<d->count+d->rrsig_count; i++) {
772 if(d->rr_ttl[i] < d->ttl)
773 d->ttl = d->rr_ttl[i];
781 /** add RR to existing RRset. If insert_sig is true, add to rrsigs.
782 * This reallocates the packed rrset for a new one */
784 rrset_add_rr(struct auth_rrset* rrset, uint32_t rr_ttl, uint8_t* rdata,
785 size_t rdatalen, int insert_sig)
787 struct packed_rrset_data* d, *old = rrset->data;
788 size_t total, old_total;
790 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old)
791 + sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t)
794 log_err("out of memory");
797 /* copy base values */
798 memcpy(d, old, sizeof(struct packed_rrset_data));
804 old_total = old->count + old->rrsig_count;
805 total = d->count + d->rrsig_count;
806 /* set rr_len, needed for ptr_fixup */
807 d->rr_len = (size_t*)((uint8_t*)d +
808 sizeof(struct packed_rrset_data));
810 memmove(d->rr_len, old->rr_len, old->count*sizeof(size_t));
811 if(old->rrsig_count != 0)
812 memmove(d->rr_len+d->count, old->rr_len+old->count,
813 old->rrsig_count*sizeof(size_t));
815 d->rr_len[d->count-1] = rdatalen;
816 else d->rr_len[total-1] = rdatalen;
817 packed_rrset_ptr_fixup(d);
818 if((time_t)rr_ttl < d->ttl)
821 /* copy old values into new array */
822 if(old->count != 0) {
823 memmove(d->rr_ttl, old->rr_ttl, old->count*sizeof(time_t));
824 /* all the old rr pieces are allocated sequential, so we
825 * can copy them in one go */
826 memmove(d->rr_data[0], old->rr_data[0],
827 (old->rr_data[old->count-1] - old->rr_data[0]) +
828 old->rr_len[old->count-1]);
830 if(old->rrsig_count != 0) {
831 memmove(d->rr_ttl+d->count, old->rr_ttl+old->count,
832 old->rrsig_count*sizeof(time_t));
833 memmove(d->rr_data[d->count], old->rr_data[old->count],
834 (old->rr_data[old_total-1] - old->rr_data[old->count]) +
835 old->rr_len[old_total-1]);
838 /* insert new value */
840 d->rr_ttl[d->count-1] = rr_ttl;
841 memmove(d->rr_data[d->count-1], rdata, rdatalen);
843 d->rr_ttl[total-1] = rr_ttl;
844 memmove(d->rr_data[total-1], rdata, rdatalen);
852 /** Create new rrset for node with packed rrset with one RR element */
853 static struct auth_rrset*
854 rrset_create(struct auth_data* node, uint16_t rr_type, uint32_t rr_ttl,
855 uint8_t* rdata, size_t rdatalen)
857 struct auth_rrset* rrset = (struct auth_rrset*)calloc(1,
859 struct auth_rrset* p, *prev;
860 struct packed_rrset_data* d;
862 log_err("out of memory");
865 rrset->type = rr_type;
867 /* the rrset data structure, with one RR */
868 d = (struct packed_rrset_data*)calloc(1,
869 sizeof(struct packed_rrset_data) + sizeof(size_t) +
870 sizeof(uint8_t*) + sizeof(time_t) + rdatalen);
873 log_err("out of memory");
878 d->trust = rrset_trust_prim_noglue;
879 d->rr_len = (size_t*)((uint8_t*)d + sizeof(struct packed_rrset_data));
880 d->rr_data = (uint8_t**)&(d->rr_len[1]);
881 d->rr_ttl = (time_t*)&(d->rr_data[1]);
882 d->rr_data[0] = (uint8_t*)&(d->rr_ttl[1]);
885 d->rr_len[0] = rdatalen;
886 d->rr_ttl[0] = rr_ttl;
887 memmove(d->rr_data[0], rdata, rdatalen);
890 /* insert rrset into linked list for domain */
891 /* find sorted place to link the rrset into the list */
894 while(p && p->type<=rr_type) {
898 /* so, prev is smaller, and p is larger than rr_type */
900 if(prev) prev->next = rrset;
901 else node->rrsets = rrset;
905 /** count number (and size) of rrsigs that cover a type */
907 rrsig_num_that_cover(struct auth_rrset* rrsig, uint16_t rr_type, size_t* sigsz)
909 struct packed_rrset_data* d = rrsig->data;
912 log_assert(d && rrsig->type == LDNS_RR_TYPE_RRSIG);
913 for(i=0; i<d->count+d->rrsig_count; i++) {
914 if(rrsig_rdata_get_type_covered(d->rr_data[i],
915 d->rr_len[i]) == rr_type) {
917 (*sigsz) += d->rr_len[i];
923 /** See if rrsig set has covered sigs for rrset and move them over */
925 rrset_moveover_rrsigs(struct auth_data* node, uint16_t rr_type,
926 struct auth_rrset* rrset, struct auth_rrset* rrsig)
928 size_t sigs, sigsz, i, j, total;
929 struct packed_rrset_data* sigold = rrsig->data;
930 struct packed_rrset_data* old = rrset->data;
931 struct packed_rrset_data* d, *sigd;
933 log_assert(rrset->type == rr_type);
934 log_assert(rrsig->type == LDNS_RR_TYPE_RRSIG);
935 sigs = rrsig_num_that_cover(rrsig, rr_type, &sigsz);
937 /* 0 rrsigs to move over, done */
941 /* allocate rrset sigsz larger for extra sigs elements, and
942 * allocate rrsig sigsz smaller for less sigs elements. */
943 d = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(old)
944 + sigs*(sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t))
947 log_err("out of memory");
950 /* copy base values */
951 total = old->count + old->rrsig_count;
952 memcpy(d, old, sizeof(struct packed_rrset_data));
953 d->rrsig_count += sigs;
955 d->rr_len = (size_t*)((uint8_t*)d +
956 sizeof(struct packed_rrset_data));
958 memmove(d->rr_len, old->rr_len, total*sizeof(size_t));
959 j = d->count+d->rrsig_count-sigs;
960 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
961 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
962 sigold->rr_len[i]) == rr_type) {
963 d->rr_len[j] = sigold->rr_len[i];
967 packed_rrset_ptr_fixup(d);
969 /* copy old values into new array */
971 memmove(d->rr_ttl, old->rr_ttl, total*sizeof(time_t));
972 /* all the old rr pieces are allocated sequential, so we
973 * can copy them in one go */
974 memmove(d->rr_data[0], old->rr_data[0],
975 (old->rr_data[total-1] - old->rr_data[0]) +
976 old->rr_len[total-1]);
979 /* move over the rrsigs to the larger rrset*/
980 j = d->count+d->rrsig_count-sigs;
981 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
982 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
983 sigold->rr_len[i]) == rr_type) {
984 /* move this one over to location j */
985 d->rr_ttl[j] = sigold->rr_ttl[i];
986 memmove(d->rr_data[j], sigold->rr_data[i],
988 if(d->rr_ttl[j] < d->ttl)
989 d->ttl = d->rr_ttl[j];
994 /* put it in and deallocate the old rrset */
998 /* now make rrsig set smaller */
999 if(sigold->count+sigold->rrsig_count == sigs) {
1000 /* remove all sigs from rrsig, remove it entirely */
1001 domain_remove_rrset(node, LDNS_RR_TYPE_RRSIG);
1004 log_assert(packed_rrset_sizeof(sigold) > sigs*(sizeof(size_t) +
1005 sizeof(uint8_t*) + sizeof(time_t)) + sigsz);
1006 sigd = (struct packed_rrset_data*)calloc(1, packed_rrset_sizeof(sigold)
1007 - sigs*(sizeof(size_t) + sizeof(uint8_t*) + sizeof(time_t))
1010 /* no need to free up d, it has already been placed in the
1011 * node->rrset structure */
1012 log_err("out of memory");
1015 /* copy base values */
1016 memcpy(sigd, sigold, sizeof(struct packed_rrset_data));
1017 sigd->rrsig_count -= sigs;
1019 sigd->rr_len = (size_t*)((uint8_t*)sigd +
1020 sizeof(struct packed_rrset_data));
1022 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
1023 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
1024 sigold->rr_len[i]) != rr_type) {
1025 sigd->rr_len[j] = sigold->rr_len[i];
1029 packed_rrset_ptr_fixup(sigd);
1031 /* copy old values into new rrsig array */
1033 for(i=0; i<sigold->count+sigold->rrsig_count; i++) {
1034 if(rrsig_rdata_get_type_covered(sigold->rr_data[i],
1035 sigold->rr_len[i]) != rr_type) {
1036 /* move this one over to location j */
1037 sigd->rr_ttl[j] = sigold->rr_ttl[i];
1038 memmove(sigd->rr_data[j], sigold->rr_data[i],
1040 if(j==0) sigd->ttl = sigd->rr_ttl[j];
1042 if(sigd->rr_ttl[j] < sigd->ttl)
1043 sigd->ttl = sigd->rr_ttl[j];
1049 /* put it in and deallocate the old rrset */
1056 /** copy the rrsigs from the rrset to the rrsig rrset, because the rrset
1057 * is going to be deleted. reallocates the RRSIG rrset data. */
1059 rrsigs_copy_from_rrset_to_rrsigset(struct auth_rrset* rrset,
1060 struct auth_rrset* rrsigset)
1063 if(rrset->data->rrsig_count == 0)
1066 /* move them over one by one, because there might be duplicates,
1067 * duplicates are ignored */
1068 for(i=rrset->data->count;
1069 i<rrset->data->count+rrset->data->rrsig_count; i++) {
1070 uint8_t* rdata = rrset->data->rr_data[i];
1071 size_t rdatalen = rrset->data->rr_len[i];
1072 time_t rr_ttl = rrset->data->rr_ttl[i];
1074 if(rdata_duplicate(rrsigset->data, rdata, rdatalen)) {
1077 if(!rrset_add_rr(rrsigset, rr_ttl, rdata, rdatalen, 0))
1083 /** Add rr to node, ignores duplicate RRs,
1084 * rdata points to buffer with rdatalen octets, starts with 2bytelength. */
1086 az_domain_add_rr(struct auth_data* node, uint16_t rr_type, uint32_t rr_ttl,
1087 uint8_t* rdata, size_t rdatalen, int* duplicate)
1089 struct auth_rrset* rrset;
1090 /* packed rrsets have their rrsigs along with them, sort them out */
1091 if(rr_type == LDNS_RR_TYPE_RRSIG) {
1092 uint16_t ctype = rrsig_rdata_get_type_covered(rdata, rdatalen);
1093 if((rrset=az_domain_rrset(node, ctype))!= NULL) {
1094 /* a node of the correct type exists, add the RRSIG
1095 * to the rrset of the covered data type */
1096 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1097 if(duplicate) *duplicate = 1;
1100 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 1))
1102 } else if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1103 /* add RRSIG to rrset of type RRSIG */
1104 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1105 if(duplicate) *duplicate = 1;
1108 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 0))
1111 /* create rrset of type RRSIG */
1112 if(!rrset_create(node, rr_type, rr_ttl, rdata,
1117 /* normal RR type */
1118 if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1119 /* add data to existing node with data type */
1120 if(rdata_duplicate(rrset->data, rdata, rdatalen)) {
1121 if(duplicate) *duplicate = 1;
1124 if(!rrset_add_rr(rrset, rr_ttl, rdata, rdatalen, 0))
1127 struct auth_rrset* rrsig;
1128 /* create new node with data type */
1129 if(!(rrset=rrset_create(node, rr_type, rr_ttl, rdata,
1133 /* see if node of type RRSIG has signatures that
1134 * cover the data type, and move them over */
1135 /* and then make the RRSIG type smaller */
1136 if((rrsig=az_domain_rrset(node, LDNS_RR_TYPE_RRSIG))
1138 if(!rrset_moveover_rrsigs(node, rr_type,
1147 /** insert RR into zone, ignore duplicates */
1149 az_insert_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
1150 size_t dname_len, int* duplicate)
1152 struct auth_data* node;
1153 uint8_t* dname = rr;
1154 uint16_t rr_type = sldns_wirerr_get_type(rr, rr_len, dname_len);
1155 uint16_t rr_class = sldns_wirerr_get_class(rr, rr_len, dname_len);
1156 uint32_t rr_ttl = sldns_wirerr_get_ttl(rr, rr_len, dname_len);
1157 size_t rdatalen = ((size_t)sldns_wirerr_get_rdatalen(rr, rr_len,
1159 /* rdata points to rdata prefixed with uint16 rdatalength */
1160 uint8_t* rdata = sldns_wirerr_get_rdatawl(rr, rr_len, dname_len);
1162 if(rr_class != z->dclass) {
1163 log_err("wrong class for RR");
1166 if(!(node=az_domain_find_or_create(z, dname, dname_len))) {
1167 log_err("cannot create domain");
1170 if(!az_domain_add_rr(node, rr_type, rr_ttl, rdata, rdatalen,
1172 log_err("cannot add RR to domain");
1178 /** Remove rr from node, ignores nonexisting RRs,
1179 * rdata points to buffer with rdatalen octets, starts with 2bytelength. */
1181 az_domain_remove_rr(struct auth_data* node, uint16_t rr_type,
1182 uint8_t* rdata, size_t rdatalen, int* nonexist)
1184 struct auth_rrset* rrset;
1187 /* find the plain RR of the given type */
1188 if((rrset=az_domain_rrset(node, rr_type))!= NULL) {
1189 if(az_rrset_find_rr(rrset->data, rdata, rdatalen, &index)) {
1190 if(rrset->data->count == 1 &&
1191 rrset->data->rrsig_count == 0) {
1192 /* last RR, delete the rrset */
1193 domain_remove_rrset(node, rr_type);
1194 } else if(rrset->data->count == 1 &&
1195 rrset->data->rrsig_count != 0) {
1196 /* move RRSIGs to the RRSIG rrset, or
1197 * this one becomes that RRset */
1198 struct auth_rrset* rrsigset = az_domain_rrset(
1199 node, LDNS_RR_TYPE_RRSIG);
1201 /* move left over rrsigs to the
1202 * existing rrset of type RRSIG */
1203 rrsigs_copy_from_rrset_to_rrsigset(
1205 /* and then delete the rrset */
1206 domain_remove_rrset(node, rr_type);
1208 /* no rrset of type RRSIG, this
1209 * set is now of that type,
1210 * just remove the rr */
1211 if(!rrset_remove_rr(rrset, index))
1213 rrset->type = LDNS_RR_TYPE_RRSIG;
1214 rrset->data->count = rrset->data->rrsig_count;
1215 rrset->data->rrsig_count = 0;
1218 /* remove the RR from the rrset */
1219 if(!rrset_remove_rr(rrset, index))
1224 /* rr not found in rrset */
1227 /* is it a type RRSIG, look under the covered type */
1228 if(rr_type == LDNS_RR_TYPE_RRSIG) {
1229 uint16_t ctype = rrsig_rdata_get_type_covered(rdata, rdatalen);
1230 if((rrset=az_domain_rrset(node, ctype))!= NULL) {
1231 if(az_rrset_find_rrsig(rrset->data, rdata, rdatalen,
1233 /* rrsig should have d->count > 0, be
1234 * over some rr of that type */
1235 /* remove the rrsig from the rrsigs list of the
1237 if(!rrset_remove_rr(rrset, index))
1242 /* also RRSIG not found */
1245 /* nothing found to delete */
1246 if(nonexist) *nonexist = 1;
1250 /** remove RR from zone, ignore if it does not exist, false on alloc failure*/
1252 az_remove_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
1253 size_t dname_len, int* nonexist)
1255 struct auth_data* node;
1256 uint8_t* dname = rr;
1257 uint16_t rr_type = sldns_wirerr_get_type(rr, rr_len, dname_len);
1258 uint16_t rr_class = sldns_wirerr_get_class(rr, rr_len, dname_len);
1259 size_t rdatalen = ((size_t)sldns_wirerr_get_rdatalen(rr, rr_len,
1261 /* rdata points to rdata prefixed with uint16 rdatalength */
1262 uint8_t* rdata = sldns_wirerr_get_rdatawl(rr, rr_len, dname_len);
1264 if(rr_class != z->dclass) {
1265 log_err("wrong class for RR");
1266 /* really also a nonexisting entry, because no records
1267 * of that class in the zone, but return an error because
1268 * getting records of the wrong class is a failure of the
1272 node = az_find_name(z, dname, dname_len);
1274 /* node with that name does not exist */
1275 /* nonexisting entry, because no such name */
1279 if(!az_domain_remove_rr(node, rr_type, rdata, rdatalen, nonexist)) {
1280 /* alloc failure or so */
1283 /* remove the node, if necessary */
1284 /* an rrsets==NULL entry is not kept around for empty nonterminals,
1285 * and also parent nodes are not kept around, so we just delete it */
1286 if(node->rrsets == NULL) {
1287 (void)rbtree_delete(&z->data, node);
1288 auth_data_delete(node);
1293 /** decompress an RR into the buffer where it'll be an uncompressed RR
1294 * with uncompressed dname and uncompressed rdata (dnames) */
1296 decompress_rr_into_buffer(struct sldns_buffer* buf, uint8_t* pkt,
1297 size_t pktlen, uint8_t* dname, uint16_t rr_type, uint16_t rr_class,
1298 uint32_t rr_ttl, uint8_t* rr_data, uint16_t rr_rdlen)
1300 sldns_buffer pktbuf;
1301 size_t dname_len = 0;
1305 const sldns_rr_descriptor* desc;
1306 sldns_buffer_init_frm_data(&pktbuf, pkt, pktlen);
1307 sldns_buffer_clear(buf);
1309 /* decompress dname */
1310 sldns_buffer_set_position(&pktbuf,
1311 (size_t)(dname - sldns_buffer_current(&pktbuf)));
1312 dname_len = pkt_dname_len(&pktbuf);
1313 if(dname_len == 0) return 0; /* parse fail on dname */
1314 if(!sldns_buffer_available(buf, dname_len)) return 0;
1315 dname_pkt_copy(&pktbuf, sldns_buffer_current(buf), dname);
1316 sldns_buffer_skip(buf, (ssize_t)dname_len);
1318 /* type, class, ttl and rdatalength fields */
1319 if(!sldns_buffer_available(buf, 10)) return 0;
1320 sldns_buffer_write_u16(buf, rr_type);
1321 sldns_buffer_write_u16(buf, rr_class);
1322 sldns_buffer_write_u32(buf, rr_ttl);
1323 rdlenpos = sldns_buffer_position(buf);
1324 sldns_buffer_write_u16(buf, 0); /* rd length position */
1326 /* decompress rdata */
1327 desc = sldns_rr_descript(rr_type);
1330 if(rdlen > 0 && desc && desc->_dname_count > 0) {
1331 int count = (int)desc->_dname_count;
1333 size_t len; /* how much rdata to plain copy */
1334 size_t uncompressed_len, compressed_len;
1336 /* decompress dnames. */
1337 while(rdlen > 0 && count) {
1338 switch(desc->_wireformat[rdf]) {
1339 case LDNS_RDF_TYPE_DNAME:
1340 sldns_buffer_set_position(&pktbuf,
1342 sldns_buffer_begin(&pktbuf)));
1343 oldpos = sldns_buffer_position(&pktbuf);
1344 /* moves pktbuf to right after the
1345 * compressed dname, and returns uncompressed
1347 uncompressed_len = pkt_dname_len(&pktbuf);
1348 if(!uncompressed_len)
1349 return 0; /* parse error in dname */
1350 if(!sldns_buffer_available(buf,
1352 /* dname too long for buffer */
1354 dname_pkt_copy(&pktbuf,
1355 sldns_buffer_current(buf), rd);
1356 sldns_buffer_skip(buf, (ssize_t)uncompressed_len);
1357 compressed_len = sldns_buffer_position(
1359 rd += compressed_len;
1360 rdlen -= compressed_len;
1364 case LDNS_RDF_TYPE_STR:
1368 len = get_rdf_size(desc->_wireformat[rdf]);
1372 if(!sldns_buffer_available(buf, len))
1373 return 0; /* too long for buffer */
1374 sldns_buffer_write(buf, rd, len);
1381 /* copy remaining data */
1383 if(!sldns_buffer_available(buf, rdlen)) return 0;
1384 sldns_buffer_write(buf, rd, rdlen);
1386 /* fixup rdlength */
1387 sldns_buffer_write_u16_at(buf, rdlenpos,
1388 sldns_buffer_position(buf)-rdlenpos-2);
1389 sldns_buffer_flip(buf);
1393 /** insert RR into zone, from packet, decompress RR,
1394 * if duplicate is nonNULL set the flag but otherwise ignore duplicates */
1396 az_insert_rr_decompress(struct auth_zone* z, uint8_t* pkt, size_t pktlen,
1397 struct sldns_buffer* scratch_buffer, uint8_t* dname, uint16_t rr_type,
1398 uint16_t rr_class, uint32_t rr_ttl, uint8_t* rr_data,
1399 uint16_t rr_rdlen, int* duplicate)
1404 if(!decompress_rr_into_buffer(scratch_buffer, pkt, pktlen, dname,
1405 rr_type, rr_class, rr_ttl, rr_data, rr_rdlen)) {
1406 log_err("could not decompress RR");
1409 rr = sldns_buffer_begin(scratch_buffer);
1410 rr_len = sldns_buffer_limit(scratch_buffer);
1411 dname_len = dname_valid(rr, rr_len);
1412 return az_insert_rr(z, rr, rr_len, dname_len, duplicate);
1415 /** remove RR from zone, from packet, decompress RR,
1416 * if nonexist is nonNULL set the flag but otherwise ignore nonexisting entries*/
1418 az_remove_rr_decompress(struct auth_zone* z, uint8_t* pkt, size_t pktlen,
1419 struct sldns_buffer* scratch_buffer, uint8_t* dname, uint16_t rr_type,
1420 uint16_t rr_class, uint32_t rr_ttl, uint8_t* rr_data,
1421 uint16_t rr_rdlen, int* nonexist)
1426 if(!decompress_rr_into_buffer(scratch_buffer, pkt, pktlen, dname,
1427 rr_type, rr_class, rr_ttl, rr_data, rr_rdlen)) {
1428 log_err("could not decompress RR");
1431 rr = sldns_buffer_begin(scratch_buffer);
1432 rr_len = sldns_buffer_limit(scratch_buffer);
1433 dname_len = dname_valid(rr, rr_len);
1434 return az_remove_rr(z, rr, rr_len, dname_len, nonexist);
1439 * @param z: zone to read in.
1440 * @param in: file to read from (just opened).
1441 * @param rr: buffer to use for RRs, 64k.
1442 * passed so that recursive includes can use the same buffer and do
1443 * not grow the stack too much.
1444 * @param rrbuflen: sizeof rr buffer.
1445 * @param state: parse state with $ORIGIN, $TTL and 'prev-dname' and so on,
1446 * that is kept between includes.
1447 * The lineno is set at 1 and then increased by the function.
1448 * @param fname: file name.
1449 * @param depth: recursion depth for includes
1450 * returns false on failure, has printed an error message
1453 az_parse_file(struct auth_zone* z, FILE* in, uint8_t* rr, size_t rrbuflen,
1454 struct sldns_file_parse_state* state, char* fname, int depth)
1456 size_t rr_len, dname_len;
1463 status = sldns_fp2wire_rr_buf(in, rr, &rr_len, &dname_len,
1465 if(status == LDNS_WIREPARSE_ERR_INCLUDE && rr_len == 0) {
1466 /* we have $INCLUDE or $something */
1467 if(strncmp((char*)rr, "$INCLUDE ", 9) == 0 ||
1468 strncmp((char*)rr, "$INCLUDE\t", 9) == 0) {
1470 int lineno_orig = state->lineno;
1471 char* incfile = (char*)rr + 8;
1472 if(depth > MAX_INCLUDE_DEPTH) {
1473 log_err("%s:%d max include depth"
1474 "exceeded", fname, state->lineno);
1478 while(*incfile == ' ' || *incfile == '\t')
1480 incfile = strdup(incfile);
1482 log_err("malloc failure");
1485 verbose(VERB_ALGO, "opening $INCLUDE %s",
1487 inc = fopen(incfile, "r");
1489 log_err("%s:%d cannot open include "
1490 "file %s: %s", z->zonefile,
1491 lineno_orig, incfile,
1496 /* recurse read that file now */
1497 if(!az_parse_file(z, inc, rr, rrbuflen,
1498 state, incfile, depth+1)) {
1499 log_err("%s:%d cannot parse include "
1501 lineno_orig, incfile);
1507 verbose(VERB_ALGO, "done with $INCLUDE %s",
1510 state->lineno = lineno_orig;
1515 log_err("parse error %s %d:%d: %s", fname,
1516 state->lineno, LDNS_WIREPARSE_OFFSET(status),
1517 sldns_get_errorstr_parse(status));
1521 /* EMPTY line, TTL or ORIGIN */
1524 /* insert wirerr in rrbuf */
1525 if(!az_insert_rr(z, rr, rr_len, dname_len, NULL)) {
1527 sldns_wire2str_type_buf(sldns_wirerr_get_type(rr,
1528 rr_len, dname_len), buf, sizeof(buf));
1529 log_err("%s:%d cannot insert RR of type %s",
1530 fname, state->lineno, buf);
1538 auth_zone_read_zonefile(struct auth_zone* z)
1540 uint8_t rr[LDNS_RR_BUF_SIZE];
1541 struct sldns_file_parse_state state;
1543 if(!z || !z->zonefile || z->zonefile[0]==0)
1544 return 1; /* no file, or "", nothing to read */
1545 if(verbosity >= VERB_ALGO) {
1547 dname_str(z->name, nm);
1548 verbose(VERB_ALGO, "read zonefile %s for %s", z->zonefile, nm);
1550 in = fopen(z->zonefile, "r");
1552 char* n = sldns_wire2str_dname(z->name, z->namelen);
1553 if(z->zone_is_slave && errno == ENOENT) {
1554 /* we fetch the zone contents later, no file yet */
1555 verbose(VERB_ALGO, "no zonefile %s for %s",
1556 z->zonefile, n?n:"error");
1560 log_err("cannot open zonefile %s for %s: %s",
1561 z->zonefile, n?n:"error", strerror(errno));
1566 /* clear the data tree */
1567 traverse_postorder(&z->data, auth_data_del, NULL);
1568 rbtree_init(&z->data, &auth_data_cmp);
1570 memset(&state, 0, sizeof(state));
1571 /* default TTL to 3600 */
1572 state.default_ttl = 3600;
1573 /* set $ORIGIN to the zone name */
1574 if(z->namelen <= sizeof(state.origin)) {
1575 memcpy(state.origin, z->name, z->namelen);
1576 state.origin_len = z->namelen;
1578 /* parse the (toplevel) file */
1579 if(!az_parse_file(z, in, rr, sizeof(rr), &state, z->zonefile, 0)) {
1580 char* n = sldns_wire2str_dname(z->name, z->namelen);
1581 log_err("error parsing zonefile %s for %s",
1582 z->zonefile, n?n:"error");
1591 /** write buffer to file and check return codes */
1593 write_out(FILE* out, const char* str, size_t len)
1598 r = fwrite(str, 1, len, out);
1600 log_err("write failed: %s", strerror(errno));
1602 } else if(r < len) {
1603 log_err("write failed: too short (disk full?)");
1609 /** convert auth rr to string */
1611 auth_rr_to_string(uint8_t* nm, size_t nmlen, uint16_t tp, uint16_t cl,
1612 struct packed_rrset_data* data, size_t i, char* s, size_t buflen)
1615 size_t slen = buflen, datlen;
1617 if(i >= data->count) tp = LDNS_RR_TYPE_RRSIG;
1620 w += sldns_wire2str_dname_scan(&dat, &datlen, &s, &slen, NULL, 0);
1621 w += sldns_str_print(&s, &slen, "\t");
1622 w += sldns_str_print(&s, &slen, "%lu\t", (unsigned long)data->rr_ttl[i]);
1623 w += sldns_wire2str_class_print(&s, &slen, cl);
1624 w += sldns_str_print(&s, &slen, "\t");
1625 w += sldns_wire2str_type_print(&s, &slen, tp);
1626 w += sldns_str_print(&s, &slen, "\t");
1627 datlen = data->rr_len[i]-2;
1628 dat = data->rr_data[i]+2;
1629 w += sldns_wire2str_rdata_scan(&dat, &datlen, &s, &slen, tp, NULL, 0);
1631 if(tp == LDNS_RR_TYPE_DNSKEY) {
1632 w += sldns_str_print(&s, &slen, " ;{id = %u}",
1633 sldns_calc_keytag_raw(data->rr_data[i]+2,
1634 data->rr_len[i]-2));
1636 w += sldns_str_print(&s, &slen, "\n");
1638 if(w > (int)buflen) {
1639 log_nametypeclass(0, "RR too long to print", nm, tp, cl);
1645 /** write rrset to file */
1647 auth_zone_write_rrset(struct auth_zone* z, struct auth_data* node,
1648 struct auth_rrset* r, FILE* out)
1650 size_t i, count = r->data->count + r->data->rrsig_count;
1651 char buf[LDNS_RR_BUF_SIZE];
1652 for(i=0; i<count; i++) {
1653 if(!auth_rr_to_string(node->name, node->namelen, r->type,
1654 z->dclass, r->data, i, buf, sizeof(buf))) {
1655 verbose(VERB_ALGO, "failed to rr2str rr %d", (int)i);
1658 if(!write_out(out, buf, strlen(buf)))
1664 /** write domain to file */
1666 auth_zone_write_domain(struct auth_zone* z, struct auth_data* n, FILE* out)
1668 struct auth_rrset* r;
1669 /* if this is zone apex, write SOA first */
1670 if(z->namelen == n->namelen) {
1671 struct auth_rrset* soa = az_domain_rrset(n, LDNS_RR_TYPE_SOA);
1673 if(!auth_zone_write_rrset(z, n, soa, out))
1677 /* write all the RRsets for this domain */
1678 for(r = n->rrsets; r; r = r->next) {
1679 if(z->namelen == n->namelen &&
1680 r->type == LDNS_RR_TYPE_SOA)
1681 continue; /* skip SOA here */
1682 if(!auth_zone_write_rrset(z, n, r, out))
1688 int auth_zone_write_file(struct auth_zone* z, const char* fname)
1691 struct auth_data* n;
1692 out = fopen(fname, "w");
1694 log_err("could not open %s: %s", fname, strerror(errno));
1697 RBTREE_FOR(n, struct auth_data*, &z->data) {
1698 if(!auth_zone_write_domain(z, n, out)) {
1699 log_err("could not write domain to %s", fname);
1708 /** read all auth zones from file (if they have) */
1710 auth_zones_read_zones(struct auth_zones* az)
1712 struct auth_zone* z;
1713 lock_rw_wrlock(&az->lock);
1714 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1715 lock_rw_wrlock(&z->lock);
1716 if(!auth_zone_read_zonefile(z)) {
1717 lock_rw_unlock(&z->lock);
1718 lock_rw_unlock(&az->lock);
1721 lock_rw_unlock(&z->lock);
1723 lock_rw_unlock(&az->lock);
1727 /** find serial number of zone or false if none */
1729 auth_zone_get_serial(struct auth_zone* z, uint32_t* serial)
1731 struct auth_data* apex;
1732 struct auth_rrset* soa;
1733 struct packed_rrset_data* d;
1734 apex = az_find_name(z, z->name, z->namelen);
1736 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
1737 if(!soa || soa->data->count==0)
1738 return 0; /* no RRset or no RRs in rrset */
1739 if(soa->data->rr_len[0] < 2+4*5) return 0; /* SOA too short */
1741 *serial = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-20));
1745 /** Find auth_zone SOA and populate the values in xfr(soa values). */
1747 xfr_find_soa(struct auth_zone* z, struct auth_xfer* xfr)
1749 struct auth_data* apex;
1750 struct auth_rrset* soa;
1751 struct packed_rrset_data* d;
1752 apex = az_find_name(z, z->name, z->namelen);
1754 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
1755 if(!soa || soa->data->count==0)
1756 return 0; /* no RRset or no RRs in rrset */
1757 if(soa->data->rr_len[0] < 2+4*5) return 0; /* SOA too short */
1758 /* SOA record ends with serial, refresh, retry, expiry, minimum,
1759 * as 4 byte fields */
1762 xfr->serial = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-20));
1763 xfr->refresh = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-16));
1764 xfr->retry = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-12));
1765 xfr->expiry = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-8));
1766 /* soa minimum at d->rr_len[0]-4 */
1771 * Setup auth_xfer zone
1772 * This populates the have_zone, soa values, and so on times.
1773 * Doesn't do network traffic yet, can set option flags.
1774 * @param z: locked by caller, and modified for setup
1775 * @param x: locked by caller, and modified.
1776 * @return false on failure.
1779 auth_xfer_setup(struct auth_zone* z, struct auth_xfer* x)
1781 /* for a zone without zone transfers, x==NULL, so skip them,
1782 * i.e. the zone config is fixed with no masters or urls */
1783 if(!z || !x) return 1;
1784 if(!xfr_find_soa(z, x)) {
1787 /* nothing for probe, nextprobe and transfer tasks */
1793 * @param az: auth zones structure
1794 * @return false on failure.
1797 auth_zones_setup_zones(struct auth_zones* az)
1799 struct auth_zone* z;
1800 struct auth_xfer* x;
1801 lock_rw_wrlock(&az->lock);
1802 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1803 lock_rw_wrlock(&z->lock);
1804 x = auth_xfer_find(az, z->name, z->namelen, z->dclass);
1806 lock_basic_lock(&x->lock);
1808 if(!auth_xfer_setup(z, x)) {
1810 lock_basic_unlock(&x->lock);
1812 lock_rw_unlock(&z->lock);
1813 lock_rw_unlock(&az->lock);
1817 lock_basic_unlock(&x->lock);
1819 lock_rw_unlock(&z->lock);
1821 lock_rw_unlock(&az->lock);
1825 /** set config items and create zones */
1827 auth_zones_cfg(struct auth_zones* az, struct config_auth* c)
1829 struct auth_zone* z;
1830 struct auth_xfer* x = NULL;
1833 lock_rw_wrlock(&az->lock);
1834 if(!(z=auth_zones_find_or_add_zone(az, c->name))) {
1835 lock_rw_unlock(&az->lock);
1838 if(c->masters || c->urls) {
1839 if(!(x=auth_zones_find_or_add_xfer(az, z))) {
1840 lock_rw_unlock(&az->lock);
1841 lock_rw_unlock(&z->lock);
1845 if(c->for_downstream)
1846 az->have_downstream = 1;
1847 lock_rw_unlock(&az->lock);
1850 z->zone_deleted = 0;
1851 if(!auth_zone_set_zonefile(z, c->zonefile)) {
1853 lock_basic_unlock(&x->lock);
1855 lock_rw_unlock(&z->lock);
1858 z->for_downstream = c->for_downstream;
1859 z->for_upstream = c->for_upstream;
1860 z->fallback_enabled = c->fallback_enabled;
1864 z->zone_is_slave = 1;
1865 /* set options on xfer zone */
1866 if(!xfer_set_masters(&x->task_probe->masters, c, 0)) {
1867 lock_basic_unlock(&x->lock);
1868 lock_rw_unlock(&z->lock);
1871 if(!xfer_set_masters(&x->task_transfer->masters, c, 1)) {
1872 lock_basic_unlock(&x->lock);
1873 lock_rw_unlock(&z->lock);
1876 lock_basic_unlock(&x->lock);
1879 lock_rw_unlock(&z->lock);
1883 /** set all auth zones deleted, then in auth_zones_cfg, it marks them
1884 * as nondeleted (if they are still in the config), and then later
1885 * we can find deleted zones */
1887 az_setall_deleted(struct auth_zones* az)
1889 struct auth_zone* z;
1890 lock_rw_wrlock(&az->lock);
1891 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1892 lock_rw_wrlock(&z->lock);
1893 z->zone_deleted = 1;
1894 lock_rw_unlock(&z->lock);
1896 lock_rw_unlock(&az->lock);
1899 /** find zones that are marked deleted and delete them.
1900 * This is called from apply_cfg, and there are no threads and no
1901 * workers, so the xfr can just be deleted. */
1903 az_delete_deleted_zones(struct auth_zones* az)
1905 struct auth_zone* z;
1906 struct auth_zone* delete_list = NULL, *next;
1907 struct auth_xfer* xfr;
1908 lock_rw_wrlock(&az->lock);
1909 RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
1910 lock_rw_wrlock(&z->lock);
1911 if(z->zone_deleted) {
1912 /* we cannot alter the rbtree right now, but
1913 * we can put it on a linked list and then
1915 z->delete_next = delete_list;
1918 lock_rw_unlock(&z->lock);
1920 /* now we are out of the tree loop and we can loop and delete
1924 next = z->delete_next;
1925 xfr = auth_xfer_find(az, z->name, z->namelen, z->dclass);
1927 (void)rbtree_delete(&az->xtree, &xfr->node);
1928 auth_xfer_delete(xfr);
1930 (void)rbtree_delete(&az->ztree, &z->node);
1931 auth_zone_delete(z);
1934 lock_rw_unlock(&az->lock);
1937 int auth_zones_apply_cfg(struct auth_zones* az, struct config_file* cfg,
1940 struct config_auth* p;
1941 az_setall_deleted(az);
1942 for(p = cfg->auths; p; p = p->next) {
1943 if(!p->name || p->name[0] == 0) {
1944 log_warn("auth-zone without a name, skipped");
1947 if(!auth_zones_cfg(az, p)) {
1948 log_err("cannot config auth zone %s", p->name);
1952 az_delete_deleted_zones(az);
1953 if(!auth_zones_read_zones(az))
1956 if(!auth_zones_setup_zones(az))
1963 * @param at: transfer structure with chunks list. The chunks and their
1967 auth_chunks_delete(struct auth_transfer* at)
1969 if(at->chunks_first) {
1970 struct auth_chunk* c, *cn;
1971 c = at->chunks_first;
1979 at->chunks_first = NULL;
1980 at->chunks_last = NULL;
1983 /** free master addr list */
1985 auth_free_master_addrs(struct auth_addr* list)
1987 struct auth_addr *n;
1995 /** free the masters list */
1997 auth_free_masters(struct auth_master* list)
1999 struct auth_master* n;
2002 auth_free_master_addrs(list->list);
2010 /** delete auth xfer structure
2011 * @param xfr: delete this xfer and its tasks.
2014 auth_xfer_delete(struct auth_xfer* xfr)
2017 lock_basic_destroy(&xfr->lock);
2019 if(xfr->task_nextprobe) {
2020 comm_timer_delete(xfr->task_nextprobe->timer);
2021 free(xfr->task_nextprobe);
2023 if(xfr->task_probe) {
2024 auth_free_masters(xfr->task_probe->masters);
2025 comm_point_delete(xfr->task_probe->cp);
2026 free(xfr->task_probe);
2028 if(xfr->task_transfer) {
2029 auth_free_masters(xfr->task_transfer->masters);
2030 comm_point_delete(xfr->task_transfer->cp);
2031 if(xfr->task_transfer->chunks_first) {
2032 auth_chunks_delete(xfr->task_transfer);
2034 free(xfr->task_transfer);
2036 auth_free_masters(xfr->allow_notify_list);
2040 /** helper traverse to delete zones */
2042 auth_zone_del(rbnode_type* n, void* ATTR_UNUSED(arg))
2044 struct auth_zone* z = (struct auth_zone*)n->key;
2045 auth_zone_delete(z);
2048 /** helper traverse to delete xfer zones */
2050 auth_xfer_del(rbnode_type* n, void* ATTR_UNUSED(arg))
2052 struct auth_xfer* z = (struct auth_xfer*)n->key;
2053 auth_xfer_delete(z);
2056 void auth_zones_delete(struct auth_zones* az)
2059 lock_rw_destroy(&az->lock);
2060 traverse_postorder(&az->ztree, auth_zone_del, NULL);
2061 traverse_postorder(&az->xtree, auth_xfer_del, NULL);
2065 /** true if domain has only nsec3 */
2067 domain_has_only_nsec3(struct auth_data* n)
2069 struct auth_rrset* rrset = n->rrsets;
2072 if(rrset->type == LDNS_RR_TYPE_NSEC3) {
2074 } else if(rrset->type != LDNS_RR_TYPE_RRSIG) {
2077 rrset = rrset->next;
2082 /** see if the domain has a wildcard child '*.domain' */
2083 static struct auth_data*
2084 az_find_wildcard_domain(struct auth_zone* z, uint8_t* nm, size_t nmlen)
2086 uint8_t wc[LDNS_MAX_DOMAINLEN];
2087 if(nmlen+2 > sizeof(wc))
2088 return NULL; /* result would be too long */
2089 wc[0] = 1; /* length of wildcard label */
2090 wc[1] = (uint8_t)'*'; /* wildcard label */
2091 memmove(wc+2, nm, nmlen);
2092 return az_find_name(z, wc, nmlen+2);
2095 /** find wildcard between qname and cename */
2096 static struct auth_data*
2097 az_find_wildcard(struct auth_zone* z, struct query_info* qinfo,
2098 struct auth_data* ce)
2100 uint8_t* nm = qinfo->qname;
2101 size_t nmlen = qinfo->qname_len;
2102 struct auth_data* node;
2103 if(!dname_subdomain_c(nm, z->name))
2104 return NULL; /* out of zone */
2105 while((node=az_find_wildcard_domain(z, nm, nmlen))==NULL) {
2106 /* see if we can go up to find the wildcard */
2107 if(nmlen == z->namelen)
2108 return NULL; /* top of zone reached */
2109 if(ce && nmlen == ce->namelen)
2110 return NULL; /* ce reached */
2111 if(dname_is_root(nm))
2112 return NULL; /* cannot go up */
2113 dname_remove_label(&nm, &nmlen);
2118 /** domain is not exact, find first candidate ce (name that matches
2119 * a part of qname) in tree */
2120 static struct auth_data*
2121 az_find_candidate_ce(struct auth_zone* z, struct query_info* qinfo,
2122 struct auth_data* n)
2127 nm = dname_get_shared_topdomain(qinfo->qname, n->name);
2131 dname_count_size_labels(nm, &nmlen);
2132 n = az_find_name(z, nm, nmlen);
2133 /* delete labels and go up on name */
2135 if(dname_is_root(nm))
2136 return NULL; /* cannot go up */
2137 dname_remove_label(&nm, &nmlen);
2138 n = az_find_name(z, nm, nmlen);
2143 /** go up the auth tree to next existing name. */
2144 static struct auth_data*
2145 az_domain_go_up(struct auth_zone* z, struct auth_data* n)
2147 uint8_t* nm = n->name;
2148 size_t nmlen = n->namelen;
2149 while(!dname_is_root(nm)) {
2150 dname_remove_label(&nm, &nmlen);
2151 if((n=az_find_name(z, nm, nmlen)) != NULL)
2157 /** Find the closest encloser, an name that exists and is above the
2159 * return true if the node (param node) is existing, nonobscured and
2160 * can be used to generate answers from. It is then also node_exact.
2161 * returns false if the node is not good enough (or it wasn't node_exact)
2162 * in this case the ce can be filled.
2163 * if ce is NULL, no ce exists, and likely the zone is completely empty,
2164 * not even with a zone apex.
2165 * if ce is nonNULL it is the closest enclosing upper name (that exists
2166 * itself for answer purposes). That name may have DNAME, NS or wildcard
2167 * rrset is the closest DNAME or NS rrset that was found.
2170 az_find_ce(struct auth_zone* z, struct query_info* qinfo,
2171 struct auth_data* node, int node_exact, struct auth_data** ce,
2172 struct auth_rrset** rrset)
2174 struct auth_data* n = node;
2178 /* if not exact, lookup closest exact match */
2179 n = az_find_candidate_ce(z, qinfo, n);
2181 /* if exact, the node itself is the first candidate ce */
2185 /* no direct answer from nsec3-only domains */
2186 if(n && domain_has_only_nsec3(n)) {
2191 /* with exact matches, walk up the labels until we find the
2192 * delegation, or DNAME or zone end */
2194 /* see if the current candidate has issues */
2195 /* not zone apex and has type NS */
2196 if(n->namelen != z->namelen &&
2197 (*rrset=az_domain_rrset(n, LDNS_RR_TYPE_NS)) &&
2198 /* delegate here, but DS at exact the dp has notype */
2199 (qinfo->qtype != LDNS_RR_TYPE_DS ||
2200 n->namelen != qinfo->qname_len)) {
2202 /* this is ce and the lowernode is nonexisting */
2206 /* not equal to qname and has type DNAME */
2207 if(n->namelen != qinfo->qname_len &&
2208 (*rrset=az_domain_rrset(n, LDNS_RR_TYPE_DNAME))) {
2209 /* this is ce and the lowernode is nonexisting */
2214 if(*ce == NULL && !domain_has_only_nsec3(n)) {
2215 /* if not found yet, this exact name must be
2216 * our lowest match (but not nsec3onlydomain) */
2220 /* walk up the tree by removing labels from name and lookup */
2221 n = az_domain_go_up(z, n);
2223 /* found no problems, if it was an exact node, it is fine to use */
2227 /** add additional A/AAAA from domain names in rrset rdata (+offset)
2228 * offset is number of bytes in rdata where the dname is located. */
2230 az_add_additionals_from(struct auth_zone* z, struct regional* region,
2231 struct dns_msg* msg, struct auth_rrset* rrset, size_t offset)
2233 struct packed_rrset_data* d = rrset->data;
2236 for(i=0; i<d->count; i++) {
2238 struct auth_data* domain;
2239 struct auth_rrset* ref;
2240 if(d->rr_len[i] < 2+offset)
2241 continue; /* too short */
2242 if(!(dlen = dname_valid(d->rr_data[i]+2+offset,
2243 d->rr_len[i]-2-offset)))
2244 continue; /* malformed */
2245 domain = az_find_name(z, d->rr_data[i]+2+offset, dlen);
2248 if((ref=az_domain_rrset(domain, LDNS_RR_TYPE_A)) != NULL) {
2249 if(!msg_add_rrset_ar(z, region, msg, domain, ref))
2252 if((ref=az_domain_rrset(domain, LDNS_RR_TYPE_AAAA)) != NULL) {
2253 if(!msg_add_rrset_ar(z, region, msg, domain, ref))
2260 /** add negative SOA record (with negative TTL) */
2262 az_add_negative_soa(struct auth_zone* z, struct regional* region,
2263 struct dns_msg* msg)
2266 struct packed_rrset_data* d;
2267 struct auth_rrset* soa;
2268 struct auth_data* apex = az_find_name(z, z->name, z->namelen);
2270 soa = az_domain_rrset(apex, LDNS_RR_TYPE_SOA);
2272 /* must be first to put in message; we want to fix the TTL with
2273 * one RRset here, otherwise we'd need to loop over the RRs to get
2274 * the resulting lower TTL */
2275 log_assert(msg->rep->rrset_count == 0);
2276 if(!msg_add_rrset_ns(z, region, msg, apex, soa)) return 0;
2278 d = (struct packed_rrset_data*)msg->rep->rrsets[msg->rep->rrset_count-1]->entry.data;
2279 /* last 4 bytes are minimum ttl in network format */
2280 if(d->count == 0) return 0;
2281 if(d->rr_len[0] < 2+4) return 0;
2282 minimum = sldns_read_uint32(d->rr_data[0]+(d->rr_len[0]-4));
2283 d->ttl = (time_t)minimum;
2284 d->rr_ttl[0] = (time_t)minimum;
2285 msg->rep->ttl = get_rrset_ttl(msg->rep->rrsets[0]);
2286 msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
2290 /** See if the query goes to empty nonterminal (that has no auth_data,
2291 * but there are nodes underneath. We already checked that there are
2292 * not NS, or DNAME above, so that we only need to check if some node
2293 * exists below (with nonempty rr list), return true if emptynonterminal */
2295 az_empty_nonterminal(struct auth_zone* z, struct query_info* qinfo,
2296 struct auth_data* node)
2298 struct auth_data* next;
2300 /* no smaller was found, use first (smallest) node as the
2302 next = (struct auth_data*)rbtree_first(&z->data);
2304 next = (struct auth_data*)rbtree_next(&node->node);
2306 while(next && (rbnode_type*)next != RBTREE_NULL && next->rrsets == NULL) {
2307 /* the next name has empty rrsets, is an empty nonterminal
2308 * itself, see if there exists something below it */
2309 next = (struct auth_data*)rbtree_next(&node->node);
2311 if((rbnode_type*)next == RBTREE_NULL || !next) {
2312 /* there is no next node, so something below it cannot
2316 /* a next node exists, if there was something below the query,
2317 * this node has to be it. See if it is below the query name */
2318 if(dname_strict_subdomain_c(next->name, qinfo->qname))
2323 /** create synth cname target name in buffer, or fail if too long */
2325 synth_cname_buf(uint8_t* qname, size_t qname_len, size_t dname_len,
2326 uint8_t* dtarg, size_t dtarglen, uint8_t* buf, size_t buflen)
2328 size_t newlen = qname_len + dtarglen - dname_len;
2329 if(newlen > buflen) {
2330 /* YXDOMAIN error */
2333 /* new name is concatenation of qname front (without DNAME owner)
2334 * and DNAME target name */
2335 memcpy(buf, qname, qname_len-dname_len);
2336 memmove(buf+(qname_len-dname_len), dtarg, dtarglen);
2340 /** create synthetic CNAME rrset for in a DNAME answer in region,
2341 * false on alloc failure, cname==NULL when name too long. */
2343 create_synth_cname(uint8_t* qname, size_t qname_len, struct regional* region,
2344 struct auth_data* node, struct auth_rrset* dname, uint16_t dclass,
2345 struct ub_packed_rrset_key** cname)
2347 uint8_t buf[LDNS_MAX_DOMAINLEN];
2349 size_t dtarglen, newlen;
2350 struct packed_rrset_data* d;
2352 /* get DNAME target name */
2353 if(dname->data->count < 1) return 0;
2354 if(dname->data->rr_len[0] < 3) return 0; /* at least rdatalen +1 */
2355 dtarg = dname->data->rr_data[0]+2;
2356 dtarglen = dname->data->rr_len[0]-2;
2357 if(sldns_read_uint16(dname->data->rr_data[0]) != dtarglen)
2358 return 0; /* rdatalen in DNAME rdata is malformed */
2359 if(dname_valid(dtarg, dtarglen) != dtarglen)
2360 return 0; /* DNAME RR has malformed rdata */
2362 /* synthesize a CNAME */
2363 newlen = synth_cname_buf(qname, qname_len, node->namelen,
2364 dtarg, dtarglen, buf, sizeof(buf));
2366 /* YXDOMAIN error */
2370 *cname = (struct ub_packed_rrset_key*)regional_alloc(region,
2371 sizeof(struct ub_packed_rrset_key));
2373 return 0; /* out of memory */
2374 memset(&(*cname)->entry, 0, sizeof((*cname)->entry));
2375 (*cname)->entry.key = (*cname);
2376 (*cname)->rk.type = htons(LDNS_RR_TYPE_CNAME);
2377 (*cname)->rk.rrset_class = htons(dclass);
2378 (*cname)->rk.flags = 0;
2379 (*cname)->rk.dname = regional_alloc_init(region, qname, qname_len);
2380 if(!(*cname)->rk.dname)
2381 return 0; /* out of memory */
2382 (*cname)->rk.dname_len = qname_len;
2383 (*cname)->entry.hash = rrset_key_hash(&(*cname)->rk);
2384 d = (struct packed_rrset_data*)regional_alloc_zero(region,
2385 sizeof(struct packed_rrset_data) + sizeof(size_t) +
2386 sizeof(uint8_t*) + sizeof(time_t) + sizeof(uint16_t)
2389 return 0; /* out of memory */
2390 (*cname)->entry.data = d;
2391 d->ttl = 0; /* 0 for synthesized CNAME TTL */
2394 d->trust = rrset_trust_ans_noAA;
2395 d->rr_len = (size_t*)((uint8_t*)d +
2396 sizeof(struct packed_rrset_data));
2397 d->rr_len[0] = newlen + sizeof(uint16_t);
2398 packed_rrset_ptr_fixup(d);
2399 d->rr_ttl[0] = d->ttl;
2400 sldns_write_uint16(d->rr_data[0], newlen);
2401 memmove(d->rr_data[0] + sizeof(uint16_t), buf, newlen);
2405 /** add a synthesized CNAME to the answer section */
2407 add_synth_cname(struct auth_zone* z, uint8_t* qname, size_t qname_len,
2408 struct regional* region, struct dns_msg* msg, struct auth_data* dname,
2409 struct auth_rrset* rrset)
2411 struct ub_packed_rrset_key* cname;
2412 /* synthesize a CNAME */
2413 if(!create_synth_cname(qname, qname_len, region, dname, rrset,
2414 z->dclass, &cname)) {
2419 /* cname cannot be create because of YXDOMAIN */
2420 msg->rep->flags |= LDNS_RCODE_YXDOMAIN;
2423 /* add cname to message */
2424 if(!msg_grow_array(region, msg))
2426 msg->rep->rrsets[msg->rep->rrset_count] = cname;
2427 msg->rep->rrset_count++;
2428 msg->rep->an_numrrsets++;
2433 /** Change a dname to a different one, for wildcard namechange */
2435 az_change_dnames(struct dns_msg* msg, uint8_t* oldname, uint8_t* newname,
2436 size_t newlen, int an_only)
2439 size_t start = 0, end = msg->rep->rrset_count;
2440 if(!an_only) start = msg->rep->an_numrrsets;
2441 if(an_only) end = msg->rep->an_numrrsets;
2442 for(i=start; i<end; i++) {
2443 /* allocated in region so we can change the ptrs */
2444 if(query_dname_compare(msg->rep->rrsets[i]->rk.dname, oldname)
2446 msg->rep->rrsets[i]->rk.dname = newname;
2447 msg->rep->rrsets[i]->rk.dname_len = newlen;
2452 /** find NSEC record covering the query */
2453 static struct auth_rrset*
2454 az_find_nsec_cover(struct auth_zone* z, struct auth_data** node)
2456 uint8_t* nm = (*node)->name;
2457 size_t nmlen = (*node)->namelen;
2458 struct auth_rrset* rrset;
2459 /* find the NSEC for the smallest-or-equal node */
2460 /* if node == NULL, we did not find a smaller name. But the zone
2461 * name is the smallest name and should have an NSEC. So there is
2462 * no NSEC to return (for a properly signed zone) */
2463 /* for empty nonterminals, the auth-data node should not exist,
2464 * and thus we don't need to go rbtree_previous here to find
2465 * a domain with an NSEC record */
2466 /* but there could be glue, and if this is node, then it has no NSEC.
2467 * Go up to find nonglue (previous) NSEC-holding nodes */
2468 while((rrset=az_domain_rrset(*node, LDNS_RR_TYPE_NSEC)) == NULL) {
2469 if(dname_is_root(nm)) return NULL;
2470 if(nmlen == z->namelen) return NULL;
2471 dname_remove_label(&nm, &nmlen);
2472 /* adjust *node for the nsec rrset to find in */
2473 *node = az_find_name(z, nm, nmlen);
2478 /** Find NSEC and add for wildcard denial */
2480 az_nsec_wildcard_denial(struct auth_zone* z, struct regional* region,
2481 struct dns_msg* msg, uint8_t* cenm, size_t cenmlen)
2483 struct query_info qinfo;
2485 struct auth_data* node;
2486 struct auth_rrset* nsec;
2487 uint8_t wc[LDNS_MAX_DOMAINLEN];
2488 if(cenmlen+2 > sizeof(wc))
2489 return 0; /* result would be too long */
2490 wc[0] = 1; /* length of wildcard label */
2491 wc[1] = (uint8_t)'*'; /* wildcard label */
2492 memmove(wc+2, cenm, cenmlen);
2494 /* we have '*.ce' in wc wildcard name buffer */
2495 /* get nsec cover for that */
2497 qinfo.qname_len = cenmlen+2;
2500 az_find_domain(z, &qinfo, &node_exact, &node);
2501 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
2502 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
2507 /** Find the NSEC3PARAM rrset (if any) and if true you have the parameters */
2509 az_nsec3_param(struct auth_zone* z, int* algo, size_t* iter, uint8_t** salt,
2512 struct auth_data* apex;
2513 struct auth_rrset* param;
2515 apex = az_find_name(z, z->name, z->namelen);
2517 param = az_domain_rrset(apex, LDNS_RR_TYPE_NSEC3PARAM);
2518 if(!param || param->data->count==0)
2519 return 0; /* no RRset or no RRs in rrset */
2520 /* find out which NSEC3PARAM RR has supported parameters */
2521 /* skip unknown flags (dynamic signer is recalculating nsec3 chain) */
2522 for(i=0; i<param->data->count; i++) {
2523 uint8_t* rdata = param->data->rr_data[i]+2;
2524 size_t rdatalen = param->data->rr_len[i];
2526 continue; /* too short */
2527 if(!nsec3_hash_algo_size_supported((int)(rdata[0])))
2528 continue; /* unsupported algo */
2529 if(rdatalen < (size_t)(2+5+(size_t)rdata[4]))
2530 continue; /* salt missing */
2531 if((rdata[1]&NSEC3_UNKNOWN_FLAGS)!=0)
2532 continue; /* unknown flags */
2533 *algo = (int)(rdata[0]);
2534 *iter = sldns_read_uint16(rdata+2);
2535 *saltlen = rdata[4];
2538 else *salt = rdata+5;
2541 /* no supported params */
2545 /** Hash a name with nsec3param into buffer, it has zone name appended.
2546 * return length of hash */
2548 az_nsec3_hash(uint8_t* buf, size_t buflen, uint8_t* nm, size_t nmlen,
2549 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2551 size_t hlen = nsec3_hash_algo_size_supported(algo);
2552 /* buffer has domain name, nsec3hash, and 256 is for max saltlen
2553 * (salt has 0-255 length) */
2554 unsigned char p[LDNS_MAX_DOMAINLEN+1+N3HASHBUFLEN+256];
2556 if(nmlen+saltlen > sizeof(p) || hlen+saltlen > sizeof(p))
2559 return 0; /* somehow too large for destination buffer */
2560 /* hashfunc(name, salt) */
2561 memmove(p, nm, nmlen);
2562 query_dname_tolower(p);
2563 memmove(p+nmlen, salt, saltlen);
2564 (void)secalgo_nsec3_hash(algo, p, nmlen+saltlen, (unsigned char*)buf);
2565 for(i=0; i<iter; i++) {
2566 /* hashfunc(hash, salt) */
2567 memmove(p, buf, hlen);
2568 memmove(p+hlen, salt, saltlen);
2569 (void)secalgo_nsec3_hash(algo, p, hlen+saltlen,
2570 (unsigned char*)buf);
2575 /** Hash name and return b32encoded hashname for lookup, zone name appended */
2577 az_nsec3_hashname(struct auth_zone* z, uint8_t* hashname, size_t* hashnmlen,
2578 uint8_t* nm, size_t nmlen, int algo, size_t iter, uint8_t* salt,
2581 uint8_t hash[N3HASHBUFLEN];
2584 hlen = az_nsec3_hash(hash, sizeof(hash), nm, nmlen, algo, iter,
2588 if(*hashnmlen < hlen*2+1+z->namelen) /* approx b32 as hexb16 */
2590 ret = sldns_b32_ntop_extended_hex(hash, hlen, (char*)(hashname+1),
2594 hashname[0] = (uint8_t)ret;
2596 if((*hashnmlen) - ret < z->namelen)
2598 memmove(hashname+ret, z->name, z->namelen);
2599 *hashnmlen = z->namelen+(size_t)ret;
2603 /** Find the datanode that covers the nsec3hash-name */
2604 static struct auth_data*
2605 az_nsec3_findnode(struct auth_zone* z, uint8_t* hashnm, size_t hashnmlen)
2607 struct query_info qinfo;
2608 struct auth_data* node;
2612 qinfo.qname = hashnm;
2613 qinfo.qname_len = hashnmlen;
2614 /* because canonical ordering and b32 nsec3 ordering are the same.
2615 * this is a good lookup to find the nsec3 name. */
2616 az_find_domain(z, &qinfo, &node_exact, &node);
2617 /* but we may have to skip non-nsec3 nodes */
2618 /* this may be a lot, the way to speed that up is to have a
2619 * separate nsec3 tree with nsec3 nodes */
2620 while(node && (rbnode_type*)node != RBTREE_NULL &&
2621 !az_domain_rrset(node, LDNS_RR_TYPE_NSEC3)) {
2622 node = (struct auth_data*)rbtree_previous(&node->node);
2624 if((rbnode_type*)node == RBTREE_NULL)
2629 /** Find cover for hashed(nm, nmlen) (or NULL) */
2630 static struct auth_data*
2631 az_nsec3_find_cover(struct auth_zone* z, uint8_t* nm, size_t nmlen,
2632 int algo, size_t iter, uint8_t* salt, size_t saltlen)
2634 struct auth_data* node;
2635 uint8_t hname[LDNS_MAX_DOMAINLEN];
2636 size_t hlen = sizeof(hname);
2637 if(!az_nsec3_hashname(z, hname, &hlen, nm, nmlen, algo, iter,
2640 node = az_nsec3_findnode(z, hname, hlen);
2643 /* we did not find any, perhaps because the NSEC3 hash is before
2644 * the first hash, we have to find the 'last hash' in the zone */
2645 node = (struct auth_data*)rbtree_last(&z->data);
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 exact match for hashed(nm, nmlen) NSEC3 record or NULL */
2656 static struct auth_data*
2657 az_nsec3_find_exact(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_find_name(z, hname, hlen);
2667 if(az_domain_rrset(node, LDNS_RR_TYPE_NSEC3))
2672 /** Return nextcloser name (as a ref into the qname). This is one label
2673 * more than the cenm (cename must be a suffix of qname) */
2675 az_nsec3_get_nextcloser(uint8_t* cenm, uint8_t* qname, size_t qname_len,
2676 uint8_t** nx, size_t* nxlen)
2678 int celabs = dname_count_labels(cenm);
2679 int qlabs = dname_count_labels(qname);
2680 int strip = qlabs - celabs -1;
2681 log_assert(dname_strict_subdomain(qname, qlabs, cenm, celabs));
2685 dname_remove_labels(nx, nxlen, strip);
2688 /** Find the closest encloser that has exact NSEC3.
2689 * updated cenm to the new name. If it went up no-exact-ce is true. */
2690 static struct auth_data*
2691 az_nsec3_find_ce(struct auth_zone* z, uint8_t** cenm, size_t* cenmlen,
2692 int* no_exact_ce, int algo, size_t iter, uint8_t* salt, size_t saltlen)
2694 struct auth_data* node;
2695 while((node = az_nsec3_find_exact(z, *cenm, *cenmlen,
2696 algo, iter, salt, saltlen)) == NULL) {
2697 if(*cenmlen == z->namelen) {
2698 /* next step up would take us out of the zone. fail */
2702 dname_remove_label(cenm, cenmlen);
2707 /* Insert NSEC3 record in authority section, if NULL does nothing */
2709 az_nsec3_insert(struct auth_zone* z, struct regional* region,
2710 struct dns_msg* msg, struct auth_data* node)
2712 struct auth_rrset* nsec3;
2713 if(!node) return 1; /* no node, skip this */
2714 nsec3 = az_domain_rrset(node, LDNS_RR_TYPE_NSEC3);
2715 if(!nsec3) return 1; /* if no nsec3 RR, skip it */
2716 if(!msg_add_rrset_ns(z, region, msg, node, nsec3)) return 0;
2720 /** add NSEC3 records to the zone for the nsec3 proof.
2721 * Specify with the flags with parts of the proof are required.
2722 * the ce is the exact matching name (for notype) but also delegation points.
2723 * qname is the one where the nextcloser name can be derived from.
2724 * If NSEC3 is not properly there (in the zone) nothing is added.
2725 * always enabled: include nsec3 proving about the Closest Encloser.
2726 * that is an exact match that should exist for it.
2727 * If that does not exist, a higher exact match + nxproof is enabled
2728 * (for some sort of opt-out empty nonterminal cases).
2729 * nxproof: include denial of the qname.
2730 * wcproof: include denial of wildcard (wildcard.ce).
2733 az_add_nsec3_proof(struct auth_zone* z, struct regional* region,
2734 struct dns_msg* msg, uint8_t* cenm, size_t cenmlen, uint8_t* qname,
2735 size_t qname_len, int nxproof, int wcproof)
2738 size_t iter, saltlen;
2740 int no_exact_ce = 0;
2741 struct auth_data* node;
2743 /* find parameters of nsec3 proof */
2744 if(!az_nsec3_param(z, &algo, &iter, &salt, &saltlen))
2745 return 1; /* no nsec3 */
2746 /* find ce that has an NSEC3 */
2747 node = az_nsec3_find_ce(z, &cenm, &cenmlen, &no_exact_ce,
2748 algo, iter, salt, saltlen);
2749 if(no_exact_ce) nxproof = 1;
2750 if(!az_nsec3_insert(z, region, msg, node))
2756 /* create nextcloser domain name */
2757 az_nsec3_get_nextcloser(cenm, qname, qname_len, &nx, &nxlen);
2758 /* find nsec3 that matches or covers it */
2759 node = az_nsec3_find_cover(z, nx, nxlen, algo, iter, salt,
2761 if(!az_nsec3_insert(z, region, msg, node))
2765 /* create wildcard name *.ce */
2766 uint8_t wc[LDNS_MAX_DOMAINLEN];
2768 if(cenmlen+2 > sizeof(wc))
2769 return 0; /* result would be too long */
2770 wc[0] = 1; /* length of wildcard label */
2771 wc[1] = (uint8_t)'*'; /* wildcard label */
2772 memmove(wc+2, cenm, cenmlen);
2774 /* find nsec3 that matches or covers it */
2775 node = az_nsec3_find_cover(z, wc, wclen, algo, iter, salt,
2777 if(!az_nsec3_insert(z, region, msg, node))
2783 /** generate answer for positive answer */
2785 az_generate_positive_answer(struct auth_zone* z, struct regional* region,
2786 struct dns_msg* msg, struct auth_data* node, struct auth_rrset* rrset)
2788 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2789 /* see if we want additional rrs */
2790 if(rrset->type == LDNS_RR_TYPE_MX) {
2791 if(!az_add_additionals_from(z, region, msg, rrset, 2))
2793 } else if(rrset->type == LDNS_RR_TYPE_SRV) {
2794 if(!az_add_additionals_from(z, region, msg, rrset, 6))
2796 } else if(rrset->type == LDNS_RR_TYPE_NS) {
2797 if(!az_add_additionals_from(z, region, msg, rrset, 0))
2803 /** generate answer for type ANY answer */
2805 az_generate_any_answer(struct auth_zone* z, struct regional* region,
2806 struct dns_msg* msg, struct auth_data* node)
2808 struct auth_rrset* rrset;
2810 /* add a couple (at least one) RRs */
2811 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_SOA)) != NULL) {
2812 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2815 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_MX)) != NULL) {
2816 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2819 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_A)) != NULL) {
2820 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2823 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_AAAA)) != NULL) {
2824 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2827 if(added == 0 && node->rrsets) {
2828 if(!msg_add_rrset_an(z, region, msg, node,
2829 node->rrsets)) return 0;
2834 /** follow cname chain and add more data to the answer section */
2836 follow_cname_chain(struct auth_zone* z, uint16_t qtype,
2837 struct regional* region, struct dns_msg* msg,
2838 struct packed_rrset_data* d)
2841 /* see if we can add the target of the CNAME into the answer */
2842 while(maxchain++ < MAX_CNAME_CHAIN) {
2843 struct auth_data* node;
2844 struct auth_rrset* rrset;
2846 /* d has cname rdata */
2847 if(d->count == 0) break; /* no CNAME */
2848 if(d->rr_len[0] < 2+1) break; /* too small */
2849 if((clen=dname_valid(d->rr_data[0]+2, d->rr_len[0]-2))==0)
2850 break; /* malformed */
2851 if(!dname_subdomain_c(d->rr_data[0]+2, z->name))
2852 break; /* target out of zone */
2853 if((node = az_find_name(z, d->rr_data[0]+2, clen))==NULL)
2854 break; /* no such target name */
2855 if((rrset=az_domain_rrset(node, qtype))!=NULL) {
2856 /* done we found the target */
2857 if(!msg_add_rrset_an(z, region, msg, node, rrset))
2861 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_CNAME))==NULL)
2862 break; /* no further CNAME chain, notype */
2863 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2869 /** generate answer for cname answer */
2871 az_generate_cname_answer(struct auth_zone* z, struct query_info* qinfo,
2872 struct regional* region, struct dns_msg* msg,
2873 struct auth_data* node, struct auth_rrset* rrset)
2875 if(!msg_add_rrset_an(z, region, msg, node, rrset)) return 0;
2876 if(!rrset) return 1;
2877 if(!follow_cname_chain(z, qinfo->qtype, region, msg, rrset->data))
2882 /** generate answer for notype answer */
2884 az_generate_notype_answer(struct auth_zone* z, struct regional* region,
2885 struct dns_msg* msg, struct auth_data* node)
2887 struct auth_rrset* rrset;
2888 if(!az_add_negative_soa(z, region, msg)) return 0;
2889 /* DNSSEC denial NSEC */
2890 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_NSEC))!=NULL) {
2891 if(!msg_add_rrset_ns(z, region, msg, node, rrset)) return 0;
2893 /* DNSSEC denial NSEC3 */
2894 if(!az_add_nsec3_proof(z, region, msg, node->name,
2895 node->namelen, msg->qinfo.qname,
2896 msg->qinfo.qname_len, 0, 0))
2902 /** generate answer for referral answer */
2904 az_generate_referral_answer(struct auth_zone* z, struct regional* region,
2905 struct dns_msg* msg, struct auth_data* ce, struct auth_rrset* rrset)
2907 struct auth_rrset* ds, *nsec;
2908 /* turn off AA flag, referral is nonAA because it leaves the zone */
2910 msg->rep->flags &= ~BIT_AA;
2911 if(!msg_add_rrset_ns(z, region, msg, ce, rrset)) return 0;
2912 /* add DS or deny it */
2913 if((ds=az_domain_rrset(ce, LDNS_RR_TYPE_DS))!=NULL) {
2914 if(!msg_add_rrset_ns(z, region, msg, ce, ds)) return 0;
2917 if((nsec=az_domain_rrset(ce, LDNS_RR_TYPE_NSEC))!=NULL) {
2918 if(!msg_add_rrset_ns(z, region, msg, ce, nsec))
2921 if(!az_add_nsec3_proof(z, region, msg, ce->name,
2922 ce->namelen, msg->qinfo.qname,
2923 msg->qinfo.qname_len, 0, 0))
2927 /* add additional rrs for type NS */
2928 if(!az_add_additionals_from(z, region, msg, rrset, 0)) return 0;
2932 /** generate answer for DNAME answer */
2934 az_generate_dname_answer(struct auth_zone* z, struct query_info* qinfo,
2935 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
2936 struct auth_rrset* rrset)
2939 /* add the DNAME and then a CNAME */
2940 if(!msg_add_rrset_an(z, region, msg, ce, rrset)) return 0;
2941 if(!add_synth_cname(z, qinfo->qname, qinfo->qname_len, region,
2942 msg, ce, rrset)) return 0;
2943 if(FLAGS_GET_RCODE(msg->rep->flags) == LDNS_RCODE_YXDOMAIN)
2945 if(msg->rep->rrset_count == 0 ||
2946 !msg->rep->rrsets[msg->rep->rrset_count-1])
2948 if(!follow_cname_chain(z, qinfo->qtype, region, msg,
2949 (struct packed_rrset_data*)msg->rep->rrsets[
2950 msg->rep->rrset_count-1]->entry.data))
2955 /** generate answer for wildcard answer */
2957 az_generate_wildcard_answer(struct auth_zone* z, struct query_info* qinfo,
2958 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
2959 struct auth_data* wildcard, struct auth_data* node)
2961 struct auth_rrset* rrset, *nsec;
2962 if((rrset=az_domain_rrset(wildcard, qinfo->qtype)) != NULL) {
2963 /* wildcard has type, add it */
2964 if(!msg_add_rrset_an(z, region, msg, wildcard, rrset))
2966 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
2967 msg->qinfo.qname_len, 1);
2968 } else if((rrset=az_domain_rrset(wildcard, LDNS_RR_TYPE_CNAME))!=NULL) {
2969 /* wildcard has cname instead, do that */
2970 if(!msg_add_rrset_an(z, region, msg, wildcard, rrset))
2972 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
2973 msg->qinfo.qname_len, 1);
2974 if(!follow_cname_chain(z, qinfo->qtype, region, msg,
2977 } else if(qinfo->qtype == LDNS_RR_TYPE_ANY && wildcard->rrsets) {
2978 /* add ANY rrsets from wildcard node */
2979 if(!az_generate_any_answer(z, region, msg, wildcard))
2981 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
2982 msg->qinfo.qname_len, 1);
2984 /* wildcard has nodata, notype answer */
2985 /* call other notype routine for dnssec notype denials */
2986 if(!az_generate_notype_answer(z, region, msg, wildcard))
2990 /* ce and node for dnssec denial of wildcard original name */
2991 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
2992 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
2994 if(!az_add_nsec3_proof(z, region, msg, ce->name,
2995 ce->namelen, msg->qinfo.qname,
2996 msg->qinfo.qname_len, 1, 0))
3000 /* fixup name of wildcard from *.zone to qname, use already allocated
3001 * pointer to msg qname */
3002 az_change_dnames(msg, wildcard->name, msg->qinfo.qname,
3003 msg->qinfo.qname_len, 0);
3007 /** generate answer for nxdomain answer */
3009 az_generate_nxdomain_answer(struct auth_zone* z, struct regional* region,
3010 struct dns_msg* msg, struct auth_data* ce, struct auth_data* node)
3012 struct auth_rrset* nsec;
3013 msg->rep->flags |= LDNS_RCODE_NXDOMAIN;
3014 if(!az_add_negative_soa(z, region, msg)) return 0;
3015 if((nsec=az_find_nsec_cover(z, &node)) != NULL) {
3016 if(!msg_add_rrset_ns(z, region, msg, node, nsec)) return 0;
3017 if(ce && !az_nsec_wildcard_denial(z, region, msg, ce->name,
3018 ce->namelen)) return 0;
3020 if(!az_add_nsec3_proof(z, region, msg, ce->name,
3021 ce->namelen, msg->qinfo.qname,
3022 msg->qinfo.qname_len, 1, 1))
3028 /** Create answers when an exact match exists for the domain name */
3030 az_generate_answer_with_node(struct auth_zone* z, struct query_info* qinfo,
3031 struct regional* region, struct dns_msg* msg, struct auth_data* node)
3033 struct auth_rrset* rrset;
3034 /* positive answer, rrset we are looking for exists */
3035 if((rrset=az_domain_rrset(node, qinfo->qtype)) != NULL) {
3036 return az_generate_positive_answer(z, region, msg, node, rrset);
3039 if((rrset=az_domain_rrset(node, LDNS_RR_TYPE_CNAME)) != NULL) {
3040 return az_generate_cname_answer(z, qinfo, region, msg,
3044 if(qinfo->qtype == LDNS_RR_TYPE_ANY) {
3045 return az_generate_any_answer(z, region, msg, node);
3047 /* NOERROR/NODATA (no such type at domain name) */
3048 return az_generate_notype_answer(z, region, msg, node);
3051 /** Generate answer without an existing-node that we can use.
3052 * So it'll be a referral, DNAME or nxdomain */
3054 az_generate_answer_nonexistnode(struct auth_zone* z, struct query_info* qinfo,
3055 struct regional* region, struct dns_msg* msg, struct auth_data* ce,
3056 struct auth_rrset* rrset, struct auth_data* node)
3058 struct auth_data* wildcard;
3060 /* we do not have an exact matching name (that exists) */
3061 /* see if we have a NS or DNAME in the ce */
3062 if(ce && rrset && rrset->type == LDNS_RR_TYPE_NS) {
3063 return az_generate_referral_answer(z, region, msg, ce, rrset);
3065 if(ce && rrset && rrset->type == LDNS_RR_TYPE_DNAME) {
3066 return az_generate_dname_answer(z, qinfo, region, msg, ce,
3069 /* if there is an empty nonterminal, wildcard and nxdomain don't
3070 * happen, it is a notype answer */
3071 if(az_empty_nonterminal(z, qinfo, node)) {
3072 return az_generate_notype_answer(z, region, msg, node);
3074 /* see if we have a wildcard under the ce */
3075 if((wildcard=az_find_wildcard(z, qinfo, ce)) != NULL) {
3076 return az_generate_wildcard_answer(z, qinfo, region, msg,
3077 ce, wildcard, node);
3079 /* generate nxdomain answer */
3080 return az_generate_nxdomain_answer(z, region, msg, ce, node);
3083 /** Lookup answer in a zone. */
3085 auth_zone_generate_answer(struct auth_zone* z, struct query_info* qinfo,
3086 struct regional* region, struct dns_msg** msg, int* fallback)
3088 struct auth_data* node, *ce;
3089 struct auth_rrset* rrset;
3090 int node_exact, node_exists;
3091 /* does the zone want fallback in case of failure? */
3092 *fallback = z->fallback_enabled;
3093 if(!(*msg=msg_create(region, qinfo))) return 0;
3095 /* lookup if there is a matching domain name for the query */
3096 az_find_domain(z, qinfo, &node_exact, &node);
3098 /* see if node exists for generating answers from (i.e. not glue and
3099 * obscured by NS or DNAME or NSEC3-only), and also return the
3100 * closest-encloser from that, closest node that should be used
3101 * to generate answers from that is above the query */
3102 node_exists = az_find_ce(z, qinfo, node, node_exact, &ce, &rrset);
3104 if(verbosity >= VERB_ALGO) {
3105 char zname[256], qname[256], nname[256], cename[256],
3106 tpstr[32], rrstr[32];
3107 sldns_wire2str_dname_buf(qinfo->qname, qinfo->qname_len, qname,
3109 sldns_wire2str_type_buf(qinfo->qtype, tpstr, sizeof(tpstr));
3110 sldns_wire2str_dname_buf(z->name, z->namelen, zname,
3113 sldns_wire2str_dname_buf(node->name, node->namelen,
3114 nname, sizeof(nname));
3115 else snprintf(nname, sizeof(nname), "NULL");
3117 sldns_wire2str_dname_buf(ce->name, ce->namelen,
3118 cename, sizeof(cename));
3119 else snprintf(cename, sizeof(cename), "NULL");
3120 if(rrset) sldns_wire2str_type_buf(rrset->type, rrstr,
3122 else snprintf(rrstr, sizeof(rrstr), "NULL");
3123 log_info("auth_zone %s query %s %s, domain %s %s %s, "
3124 "ce %s, rrset %s", zname, qname, tpstr, nname,
3125 (node_exact?"exact":"notexact"),
3126 (node_exists?"exist":"notexist"), cename, rrstr);
3130 /* the node is fine, generate answer from node */
3131 return az_generate_answer_with_node(z, qinfo, region, *msg,
3134 return az_generate_answer_nonexistnode(z, qinfo, region, *msg,
3138 int auth_zones_lookup(struct auth_zones* az, struct query_info* qinfo,
3139 struct regional* region, struct dns_msg** msg, int* fallback,
3140 uint8_t* dp_nm, size_t dp_nmlen)
3143 struct auth_zone* z;
3144 /* find the zone that should contain the answer. */
3145 lock_rw_rdlock(&az->lock);
3146 z = auth_zone_find(az, dp_nm, dp_nmlen, qinfo->qclass);
3148 lock_rw_unlock(&az->lock);
3149 /* no auth zone, fallback to internet */
3153 lock_rw_rdlock(&z->lock);
3154 lock_rw_unlock(&az->lock);
3156 /* if not for upstream queries, fallback */
3157 if(!z->for_upstream) {
3158 lock_rw_unlock(&z->lock);
3162 /* see what answer that zone would generate */
3163 r = auth_zone_generate_answer(z, qinfo, region, msg, fallback);
3164 lock_rw_unlock(&z->lock);
3168 /** encode auth answer */
3170 auth_answer_encode(struct query_info* qinfo, struct module_env* env,
3171 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
3172 struct dns_msg* msg)
3175 udpsize = edns->udp_size;
3176 edns->edns_version = EDNS_ADVERTISED_VERSION;
3177 edns->udp_size = EDNS_ADVERTISED_SIZE;
3178 edns->ext_rcode = 0;
3179 edns->bits &= EDNS_DO;
3181 if(!inplace_cb_reply_local_call(env, qinfo, NULL, msg->rep,
3182 (int)FLAGS_GET_RCODE(msg->rep->flags), edns, temp)
3183 || !reply_info_answer_encode(qinfo, msg->rep,
3184 *(uint16_t*)sldns_buffer_begin(buf),
3185 sldns_buffer_read_u16_at(buf, 2),
3186 buf, 0, 0, temp, udpsize, edns,
3187 (int)(edns->bits&EDNS_DO), 0)) {
3188 error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
3189 *(uint16_t*)sldns_buffer_begin(buf),
3190 sldns_buffer_read_u16_at(buf, 2), edns);
3194 /** encode auth error answer */
3196 auth_error_encode(struct query_info* qinfo, struct module_env* env,
3197 struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
3200 edns->edns_version = EDNS_ADVERTISED_VERSION;
3201 edns->udp_size = EDNS_ADVERTISED_SIZE;
3202 edns->ext_rcode = 0;
3203 edns->bits &= EDNS_DO;
3205 if(!inplace_cb_reply_local_call(env, qinfo, NULL, NULL,
3207 edns->opt_list = NULL;
3208 error_encode(buf, rcode|BIT_AA, qinfo,
3209 *(uint16_t*)sldns_buffer_begin(buf),
3210 sldns_buffer_read_u16_at(buf, 2), edns);
3213 int auth_zones_answer(struct auth_zones* az, struct module_env* env,
3214 struct query_info* qinfo, struct edns_data* edns, struct sldns_buffer* buf,
3215 struct regional* temp)
3217 struct dns_msg* msg = NULL;
3218 struct auth_zone* z;
3222 lock_rw_rdlock(&az->lock);
3223 if(!az->have_downstream) {
3224 /* no downstream auth zones */
3225 lock_rw_unlock(&az->lock);
3228 if(qinfo->qtype == LDNS_RR_TYPE_DS) {
3229 uint8_t* delname = qinfo->qname;
3230 size_t delnamelen = qinfo->qname_len;
3231 dname_remove_label(&delname, &delnamelen);
3232 z = auth_zones_find_zone(az, delname, delnamelen,
3235 z = auth_zones_find_zone(az, qinfo->qname, qinfo->qname_len,
3239 /* no zone above it */
3240 lock_rw_unlock(&az->lock);
3243 lock_rw_rdlock(&z->lock);
3244 lock_rw_unlock(&az->lock);
3245 if(!z->for_downstream) {
3246 lock_rw_unlock(&z->lock);
3250 /* answer it from zone z */
3251 r = auth_zone_generate_answer(z, qinfo, temp, &msg, &fallback);
3252 lock_rw_unlock(&z->lock);
3253 if(!r && fallback) {
3254 /* fallback to regular answering (recursive) */
3257 lock_rw_wrlock(&az->lock);
3258 az->num_query_down++;
3259 lock_rw_unlock(&az->lock);
3263 auth_error_encode(qinfo, env, edns, buf, temp,
3264 LDNS_RCODE_SERVFAIL);
3265 else auth_answer_encode(qinfo, env, edns, buf, temp, msg);
3270 int auth_zones_can_fallback(struct auth_zones* az, uint8_t* nm, size_t nmlen,
3274 struct auth_zone* z;
3275 lock_rw_rdlock(&az->lock);
3276 z = auth_zone_find(az, nm, nmlen, dclass);
3278 lock_rw_unlock(&az->lock);
3279 /* no such auth zone, fallback */
3282 lock_rw_rdlock(&z->lock);
3283 lock_rw_unlock(&az->lock);
3284 r = z->fallback_enabled || (!z->for_upstream);
3285 lock_rw_unlock(&z->lock);
3290 auth_zone_parse_notify_serial(sldns_buffer* pkt, uint32_t *serial)
3292 struct query_info q;
3294 memset(&q, 0, sizeof(q));
3295 sldns_buffer_set_position(pkt, 0);
3296 if(!query_info_parse(&q, pkt)) return 0;
3297 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) == 0) return 0;
3298 /* skip name of RR in answer section */
3299 if(sldns_buffer_remaining(pkt) < 1) return 0;
3300 if(pkt_dname_len(pkt) == 0) return 0;
3302 if(sldns_buffer_remaining(pkt) < 10 /* type,class,ttl,rdatalen*/)
3304 if(sldns_buffer_read_u16(pkt) != LDNS_RR_TYPE_SOA) return 0;
3305 sldns_buffer_skip(pkt, 2); /* class */
3306 sldns_buffer_skip(pkt, 4); /* ttl */
3307 rdlen = sldns_buffer_read_u16(pkt); /* rdatalen */
3308 if(sldns_buffer_remaining(pkt) < rdlen) return 0;
3309 if(rdlen < 22) return 0; /* bad soa length */
3310 sldns_buffer_skip(pkt, (ssize_t)(rdlen-20));
3311 *serial = sldns_buffer_read_u32(pkt);
3312 /* return true when has serial in answer section */
3316 /** see if addr appears in the list */
3318 addr_in_list(struct auth_addr* list, struct sockaddr_storage* addr,
3321 struct auth_addr* p;
3322 for(p=list; p; p=p->next) {
3323 if(sockaddr_cmp_addr(addr, addrlen, &p->addr, p->addrlen)==0)
3329 /** check if an address matches a master specification (or one of its
3330 * addresses in the addr list) */
3332 addr_matches_master(struct auth_master* master, struct sockaddr_storage* addr,
3333 socklen_t addrlen, struct auth_master** fromhost)
3335 struct sockaddr_storage a;
3338 if(addr_in_list(master->list, addr, addrlen)) {
3342 /* compare address (but not port number, that is the destination
3343 * port of the master, the port number of the received notify is
3344 * allowed to by any port on that master) */
3345 if(extstrtoaddr(master->host, &a, &alen) &&
3346 sockaddr_cmp_addr(addr, addrlen, &a, alen)==0) {
3350 /* prefixes, addr/len, like 10.0.0.0/8 */
3351 /* not http and has a / and there is one / */
3352 if(master->allow_notify && !master->http &&
3353 strchr(master->host, '/') != NULL &&
3354 strchr(master->host, '/') == strrchr(master->host, '/') &&
3355 netblockstrtoaddr(master->host, UNBOUND_DNS_PORT, &a, &alen,
3356 &net) && alen == addrlen) {
3357 if(addr_in_common(addr, (addr_is_ip6(addr, addrlen)?128:32),
3358 &a, net, alen) >= net) {
3359 *fromhost = NULL; /* prefix does not have destination
3360 to send the probe or transfer with */
3361 return 1; /* matches the netblock */
3367 /** check access list for notifies */
3369 az_xfr_allowed_notify(struct auth_xfer* xfr, struct sockaddr_storage* addr,
3370 socklen_t addrlen, struct auth_master** fromhost)
3372 struct auth_master* p;
3373 for(p=xfr->allow_notify_list; p; p=p->next) {
3374 if(addr_matches_master(p, addr, addrlen, fromhost)) {
3381 /** see if the serial means the zone has to be updated, i.e. the serial
3382 * is newer than the zone serial, or we have no zone */
3384 xfr_serial_means_update(struct auth_xfer* xfr, uint32_t serial)
3387 return 1; /* no zone, anything is better */
3388 if(xfr->zone_expired)
3389 return 1; /* expired, the sent serial is better than expired
3391 if(compare_serial(xfr->serial, serial) < 0)
3392 return 1; /* our serial is smaller than the sent serial,
3393 the data is newer, fetch it */
3397 /** note notify serial, updates the notify information in the xfr struct */
3399 xfr_note_notify_serial(struct auth_xfer* xfr, int has_serial, uint32_t serial)
3401 if(xfr->notify_received && xfr->notify_has_serial && has_serial) {
3402 /* see if this serial is newer */
3403 if(compare_serial(xfr->notify_serial, serial) < 0)
3404 xfr->notify_serial = serial;
3405 } else if(xfr->notify_received && xfr->notify_has_serial &&
3407 /* remove serial, we have notify without serial */
3408 xfr->notify_has_serial = 0;
3409 xfr->notify_serial = 0;
3410 } else if(xfr->notify_received && !xfr->notify_has_serial) {
3411 /* we already have notify without serial, keep it
3412 * that way; no serial check when current operation
3415 xfr->notify_received = 1;
3416 xfr->notify_has_serial = has_serial;
3417 xfr->notify_serial = serial;
3421 /** process a notify serial, start new probe or note serial. xfr is locked */
3423 xfr_process_notify(struct auth_xfer* xfr, struct module_env* env,
3424 int has_serial, uint32_t serial, struct auth_master* fromhost)
3426 /* if the serial of notify is older than we have, don't fetch
3427 * a zone, we already have it */
3428 if(has_serial && !xfr_serial_means_update(xfr, serial)) {
3429 lock_basic_unlock(&xfr->lock);
3432 /* start new probe with this addr src, or note serial */
3433 if(!xfr_start_probe(xfr, env, fromhost)) {
3434 /* not started because already in progress, note the serial */
3435 xfr_note_notify_serial(xfr, has_serial, serial);
3436 lock_basic_unlock(&xfr->lock);
3438 /* successful end of start_probe unlocked xfr->lock */
3441 int auth_zones_notify(struct auth_zones* az, struct module_env* env,
3442 uint8_t* nm, size_t nmlen, uint16_t dclass,
3443 struct sockaddr_storage* addr, socklen_t addrlen, int has_serial,
3444 uint32_t serial, int* refused)
3446 struct auth_xfer* xfr;
3447 struct auth_master* fromhost = NULL;
3448 /* see which zone this is */
3449 lock_rw_rdlock(&az->lock);
3450 xfr = auth_xfer_find(az, nm, nmlen, dclass);
3452 lock_rw_unlock(&az->lock);
3453 /* no such zone, refuse the notify */
3457 lock_basic_lock(&xfr->lock);
3458 lock_rw_unlock(&az->lock);
3460 /* check access list for notifies */
3461 if(!az_xfr_allowed_notify(xfr, addr, addrlen, &fromhost)) {
3462 lock_basic_unlock(&xfr->lock);
3463 /* notify not allowed, refuse the notify */
3468 /* process the notify */
3469 xfr_process_notify(xfr, env, has_serial, serial, fromhost);
3473 /** set a zone expired */
3475 auth_xfer_set_expired(struct auth_xfer* xfr, struct module_env* env,
3478 struct auth_zone* z;
3481 lock_basic_lock(&xfr->lock);
3482 xfr->zone_expired = expired;
3483 lock_basic_unlock(&xfr->lock);
3485 /* find auth_zone */
3486 lock_rw_rdlock(&env->auth_zones->lock);
3487 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
3490 lock_rw_unlock(&env->auth_zones->lock);
3493 lock_rw_wrlock(&z->lock);
3494 lock_rw_unlock(&env->auth_zones->lock);
3496 /* expire auth_zone */
3497 z->zone_expired = expired;
3498 lock_rw_unlock(&z->lock);
3501 /** find master (from notify or probe) in list of masters */
3502 static struct auth_master*
3503 find_master_by_host(struct auth_master* list, char* host)
3505 struct auth_master* p;
3506 for(p=list; p; p=p->next) {
3507 if(strcmp(p->host, host) == 0)
3513 /** delete the looked up auth_addrs for all the masters in the list */
3515 xfr_masterlist_free_addrs(struct auth_master* list)
3517 struct auth_master* m;
3518 for(m=list; m; m=m->next) {
3520 auth_free_master_addrs(m->list);
3526 /** copy a list of auth_addrs */
3527 static struct auth_addr*
3528 auth_addr_list_copy(struct auth_addr* source)
3530 struct auth_addr* list = NULL, *last = NULL;
3531 struct auth_addr* p;
3532 for(p=source; p; p=p->next) {
3533 struct auth_addr* a = (struct auth_addr*)memdup(p, sizeof(*p));
3535 log_err("malloc failure");
3536 auth_free_master_addrs(list);
3540 if(last) last->next = a;
3547 /** copy a master to a new structure, NULL on alloc failure */
3548 static struct auth_master*
3549 auth_master_copy(struct auth_master* o)
3551 struct auth_master* m;
3553 m = (struct auth_master*)memdup(o, sizeof(*o));
3555 log_err("malloc failure");
3560 m->host = strdup(m->host);
3563 log_err("malloc failure");
3568 m->file = strdup(m->file);
3572 log_err("malloc failure");
3577 m->list = auth_addr_list_copy(m->list);
3588 /** copy the master addresses from the task_probe lookups to the allow_notify
3589 * list of masters */
3591 probe_copy_masters_for_allow_notify(struct auth_xfer* xfr)
3593 struct auth_master* list = NULL, *last = NULL;
3594 struct auth_master* p;
3595 /* build up new list with copies */
3596 for(p = xfr->task_probe->masters; p; p=p->next) {
3597 struct auth_master* m = auth_master_copy(p);
3599 auth_free_masters(list);
3600 /* failed because of malloc failure, use old list */
3604 if(last) last->next = m;
3608 /* success, replace list */
3609 auth_free_masters(xfr->allow_notify_list);
3610 xfr->allow_notify_list = list;
3613 /** start the lookups for task_transfer */
3615 xfr_transfer_start_lookups(struct auth_xfer* xfr)
3617 /* delete all the looked up addresses in the list */
3618 xfr_masterlist_free_addrs(xfr->task_transfer->masters);
3620 /* start lookup at the first master */
3621 xfr->task_transfer->lookup_target = xfr->task_transfer->masters;
3622 xfr->task_transfer->lookup_aaaa = 0;
3625 /** move to the next lookup of hostname for task_transfer */
3627 xfr_transfer_move_to_next_lookup(struct auth_xfer* xfr, struct module_env* env)
3629 if(!xfr->task_transfer->lookup_target)
3630 return; /* already at end of list */
3631 if(!xfr->task_transfer->lookup_aaaa && env->cfg->do_ip6) {
3632 /* move to lookup AAAA */
3633 xfr->task_transfer->lookup_aaaa = 1;
3636 xfr->task_transfer->lookup_target =
3637 xfr->task_transfer->lookup_target->next;
3638 xfr->task_transfer->lookup_aaaa = 0;
3639 if(!env->cfg->do_ip4 && xfr->task_transfer->lookup_target!=NULL)
3640 xfr->task_transfer->lookup_aaaa = 1;
3643 /** start the lookups for task_probe */
3645 xfr_probe_start_lookups(struct auth_xfer* xfr)
3647 /* delete all the looked up addresses in the list */
3648 xfr_masterlist_free_addrs(xfr->task_probe->masters);
3650 /* start lookup at the first master */
3651 xfr->task_probe->lookup_target = xfr->task_probe->masters;
3652 xfr->task_probe->lookup_aaaa = 0;
3655 /** move to the next lookup of hostname for task_probe */
3657 xfr_probe_move_to_next_lookup(struct auth_xfer* xfr, struct module_env* env)
3659 if(!xfr->task_probe->lookup_target)
3660 return; /* already at end of list */
3661 if(!xfr->task_probe->lookup_aaaa && env->cfg->do_ip6) {
3662 /* move to lookup AAAA */
3663 xfr->task_probe->lookup_aaaa = 1;
3666 xfr->task_probe->lookup_target = xfr->task_probe->lookup_target->next;
3667 xfr->task_probe->lookup_aaaa = 0;
3668 if(!env->cfg->do_ip4 && xfr->task_probe->lookup_target!=NULL)
3669 xfr->task_probe->lookup_aaaa = 1;
3672 /** start the iteration of the task_transfer list of masters */
3674 xfr_transfer_start_list(struct auth_xfer* xfr, struct auth_master* spec)
3677 xfr->task_transfer->scan_specific = find_master_by_host(
3678 xfr->task_transfer->masters, spec->host);
3679 if(xfr->task_transfer->scan_specific) {
3680 xfr->task_transfer->scan_target = NULL;
3681 xfr->task_transfer->scan_addr = NULL;
3682 if(xfr->task_transfer->scan_specific->list)
3683 xfr->task_transfer->scan_addr =
3684 xfr->task_transfer->scan_specific->list;
3688 /* no specific (notified) host to scan */
3689 xfr->task_transfer->scan_specific = NULL;
3690 xfr->task_transfer->scan_addr = NULL;
3691 /* pick up first scan target */
3692 xfr->task_transfer->scan_target = xfr->task_transfer->masters;
3693 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3695 xfr->task_transfer->scan_addr =
3696 xfr->task_transfer->scan_target->list;
3699 /** start the iteration of the task_probe list of masters */
3701 xfr_probe_start_list(struct auth_xfer* xfr, struct auth_master* spec)
3704 xfr->task_probe->scan_specific = find_master_by_host(
3705 xfr->task_probe->masters, spec->host);
3706 if(xfr->task_probe->scan_specific) {
3707 xfr->task_probe->scan_target = NULL;
3708 xfr->task_probe->scan_addr = NULL;
3709 if(xfr->task_probe->scan_specific->list)
3710 xfr->task_probe->scan_addr =
3711 xfr->task_probe->scan_specific->list;
3715 /* no specific (notified) host to scan */
3716 xfr->task_probe->scan_specific = NULL;
3717 xfr->task_probe->scan_addr = NULL;
3718 /* pick up first scan target */
3719 xfr->task_probe->scan_target = xfr->task_probe->masters;
3720 if(xfr->task_probe->scan_target && xfr->task_probe->scan_target->list)
3721 xfr->task_probe->scan_addr =
3722 xfr->task_probe->scan_target->list;
3725 /** pick up the master that is being scanned right now, task_transfer */
3726 static struct auth_master*
3727 xfr_transfer_current_master(struct auth_xfer* xfr)
3729 if(xfr->task_transfer->scan_specific)
3730 return xfr->task_transfer->scan_specific;
3731 return xfr->task_transfer->scan_target;
3734 /** pick up the master that is being scanned right now, task_probe */
3735 static struct auth_master*
3736 xfr_probe_current_master(struct auth_xfer* xfr)
3738 if(xfr->task_probe->scan_specific)
3739 return xfr->task_probe->scan_specific;
3740 return xfr->task_probe->scan_target;
3743 /** true if at end of list, task_transfer */
3745 xfr_transfer_end_of_list(struct auth_xfer* xfr)
3747 return !xfr->task_transfer->scan_specific &&
3748 !xfr->task_transfer->scan_target;
3751 /** true if at end of list, task_probe */
3753 xfr_probe_end_of_list(struct auth_xfer* xfr)
3755 return !xfr->task_probe->scan_specific && !xfr->task_probe->scan_target;
3758 /** move to next master in list, task_transfer */
3760 xfr_transfer_nextmaster(struct auth_xfer* xfr)
3762 if(!xfr->task_transfer->scan_specific &&
3763 !xfr->task_transfer->scan_target)
3765 if(xfr->task_transfer->scan_addr) {
3766 xfr->task_transfer->scan_addr =
3767 xfr->task_transfer->scan_addr->next;
3768 if(xfr->task_transfer->scan_addr)
3771 if(xfr->task_transfer->scan_specific) {
3772 xfr->task_transfer->scan_specific = NULL;
3773 xfr->task_transfer->scan_target = xfr->task_transfer->masters;
3774 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3776 xfr->task_transfer->scan_addr =
3777 xfr->task_transfer->scan_target->list;
3780 if(!xfr->task_transfer->scan_target)
3782 xfr->task_transfer->scan_target = xfr->task_transfer->scan_target->next;
3783 if(xfr->task_transfer->scan_target && xfr->task_transfer->
3785 xfr->task_transfer->scan_addr =
3786 xfr->task_transfer->scan_target->list;
3790 /** move to next master in list, task_probe */
3792 xfr_probe_nextmaster(struct auth_xfer* xfr)
3794 if(!xfr->task_probe->scan_specific && !xfr->task_probe->scan_target)
3796 if(xfr->task_probe->scan_addr) {
3797 xfr->task_probe->scan_addr = xfr->task_probe->scan_addr->next;
3798 if(xfr->task_probe->scan_addr)
3801 if(xfr->task_probe->scan_specific) {
3802 xfr->task_probe->scan_specific = NULL;
3803 xfr->task_probe->scan_target = xfr->task_probe->masters;
3804 if(xfr->task_probe->scan_target && xfr->task_probe->
3806 xfr->task_probe->scan_addr =
3807 xfr->task_probe->scan_target->list;
3810 if(!xfr->task_probe->scan_target)
3812 xfr->task_probe->scan_target = xfr->task_probe->scan_target->next;
3813 if(xfr->task_probe->scan_target && xfr->task_probe->
3815 xfr->task_probe->scan_addr =
3816 xfr->task_probe->scan_target->list;
3820 /** create SOA probe packet for xfr */
3822 xfr_create_soa_probe_packet(struct auth_xfer* xfr, sldns_buffer* buf,
3825 struct query_info qinfo;
3827 memset(&qinfo, 0, sizeof(qinfo));
3828 qinfo.qname = xfr->name;
3829 qinfo.qname_len = xfr->namelen;
3830 qinfo.qtype = LDNS_RR_TYPE_SOA;
3831 qinfo.qclass = xfr->dclass;
3832 qinfo_query_encode(buf, &qinfo);
3833 sldns_buffer_write_u16_at(buf, 0, id);
3836 /** create IXFR/AXFR packet for xfr */
3838 xfr_create_ixfr_packet(struct auth_xfer* xfr, sldns_buffer* buf, uint16_t id,
3839 struct auth_master* master)
3841 struct query_info qinfo;
3844 have_zone = xfr->have_zone;
3845 serial = xfr->serial;
3847 memset(&qinfo, 0, sizeof(qinfo));
3848 qinfo.qname = xfr->name;
3849 qinfo.qname_len = xfr->namelen;
3850 xfr->task_transfer->got_xfr_serial = 0;
3851 xfr->task_transfer->rr_scan_num = 0;
3852 xfr->task_transfer->incoming_xfr_serial = 0;
3853 xfr->task_transfer->on_ixfr_is_axfr = 0;
3854 xfr->task_transfer->on_ixfr = 1;
3855 qinfo.qtype = LDNS_RR_TYPE_IXFR;
3856 if(!have_zone || xfr->task_transfer->ixfr_fail || !master->ixfr) {
3857 qinfo.qtype = LDNS_RR_TYPE_AXFR;
3858 xfr->task_transfer->ixfr_fail = 0;
3859 xfr->task_transfer->on_ixfr = 0;
3862 qinfo.qclass = xfr->dclass;
3863 qinfo_query_encode(buf, &qinfo);
3864 sldns_buffer_write_u16_at(buf, 0, id);
3866 /* append serial for IXFR */
3867 if(qinfo.qtype == LDNS_RR_TYPE_IXFR) {
3868 size_t end = sldns_buffer_limit(buf);
3869 sldns_buffer_clear(buf);
3870 sldns_buffer_set_position(buf, end);
3871 /* auth section count 1 */
3872 sldns_buffer_write_u16_at(buf, LDNS_NSCOUNT_OFF, 1);
3874 sldns_buffer_write_u8(buf, 0xC0); /* compressed ptr to qname */
3875 sldns_buffer_write_u8(buf, 0x0C);
3876 sldns_buffer_write_u16(buf, LDNS_RR_TYPE_SOA);
3877 sldns_buffer_write_u16(buf, qinfo.qclass);
3878 sldns_buffer_write_u32(buf, 0); /* ttl */
3879 sldns_buffer_write_u16(buf, 22); /* rdata length */
3880 sldns_buffer_write_u8(buf, 0); /* . */
3881 sldns_buffer_write_u8(buf, 0); /* . */
3882 sldns_buffer_write_u32(buf, serial); /* serial */
3883 sldns_buffer_write_u32(buf, 0); /* refresh */
3884 sldns_buffer_write_u32(buf, 0); /* retry */
3885 sldns_buffer_write_u32(buf, 0); /* expire */
3886 sldns_buffer_write_u32(buf, 0); /* minimum */
3887 sldns_buffer_flip(buf);
3891 /** check if returned packet is OK */
3893 check_packet_ok(sldns_buffer* pkt, uint16_t qtype, struct auth_xfer* xfr,
3896 /* parse to see if packet worked, valid reply */
3898 /* check serial number of SOA */
3899 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE)
3903 if(LDNS_ID_WIRE(sldns_buffer_begin(pkt)) != xfr->task_probe->id)
3906 /* check flag bits and rcode */
3907 if(!LDNS_QR_WIRE(sldns_buffer_begin(pkt)))
3909 if(LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_QUERY)
3911 if(LDNS_RCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_RCODE_NOERROR)
3915 if(LDNS_QDCOUNT(sldns_buffer_begin(pkt)) != 1)
3917 sldns_buffer_skip(pkt, LDNS_HEADER_SIZE);
3918 if(sldns_buffer_remaining(pkt) < xfr->namelen)
3920 if(query_dname_compare(sldns_buffer_current(pkt), xfr->name) != 0)
3922 sldns_buffer_skip(pkt, (ssize_t)xfr->namelen);
3924 /* check qtype, qclass */
3925 if(sldns_buffer_remaining(pkt) < 4)
3927 if(sldns_buffer_read_u16(pkt) != qtype)
3929 if(sldns_buffer_read_u16(pkt) != xfr->dclass)
3934 /* read serial number, from answer section SOA */
3935 if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) == 0)
3937 /* read from first record SOA record */
3938 if(sldns_buffer_remaining(pkt) < 1)
3940 if(dname_pkt_compare(pkt, sldns_buffer_current(pkt),
3943 if(!pkt_dname_len(pkt))
3945 /* type, class, ttl, rdatalen */
3946 if(sldns_buffer_remaining(pkt) < 4+4+2)
3948 if(sldns_buffer_read_u16(pkt) != qtype)
3950 if(sldns_buffer_read_u16(pkt) != xfr->dclass)
3952 sldns_buffer_skip(pkt, 4); /* ttl */
3953 rdlen = sldns_buffer_read_u16(pkt);
3954 if(sldns_buffer_remaining(pkt) < rdlen)
3956 if(sldns_buffer_remaining(pkt) < 1)
3958 if(!pkt_dname_len(pkt)) /* soa name */
3960 if(sldns_buffer_remaining(pkt) < 1)
3962 if(!pkt_dname_len(pkt)) /* soa name */
3964 if(sldns_buffer_remaining(pkt) < 20)
3966 *serial = sldns_buffer_read_u32(pkt);
3971 /** read one line from chunks into buffer at current position */
3973 chunkline_get_line(struct auth_chunk** chunk, size_t* chunk_pos,
3978 /* more text in this chunk? */
3979 if(*chunk_pos < (*chunk)->len) {
3981 while(*chunk_pos < (*chunk)->len) {
3982 char c = (char)((*chunk)->data[*chunk_pos]);
3984 if(sldns_buffer_remaining(buf) < 2) {
3985 /* buffer too short */
3986 verbose(VERB_ALGO, "http chunkline, "
3990 sldns_buffer_write_u8(buf, (uint8_t)c);
3997 /* move to next chunk */
3998 *chunk = (*chunk)->next;
4002 if(readsome) return 1;
4006 /** count number of open and closed parenthesis in a chunkline */
4008 chunkline_count_parens(sldns_buffer* buf, size_t start)
4010 size_t end = sldns_buffer_position(buf);
4013 int squote = 0, dquote = 0;
4014 for(i=start; i<end; i++) {
4015 char c = (char)sldns_buffer_read_u8_at(buf, i);
4016 if(squote && c != '\'') continue;
4017 if(dquote && c != '"') continue;
4019 dquote = !dquote; /* skip quoted part */
4021 squote = !squote; /* skip quoted part */
4027 /* rest is a comment */
4034 /** remove trailing ;... comment from a line in the chunkline buffer */
4036 chunkline_remove_trailcomment(sldns_buffer* buf, size_t start)
4038 size_t end = sldns_buffer_position(buf);
4040 int squote = 0, dquote = 0;
4041 for(i=start; i<end; i++) {
4042 char c = (char)sldns_buffer_read_u8_at(buf, i);
4043 if(squote && c != '\'') continue;
4044 if(dquote && c != '"') continue;
4046 dquote = !dquote; /* skip quoted part */
4048 squote = !squote; /* skip quoted part */
4050 /* rest is a comment */
4051 sldns_buffer_set_position(buf, i);
4055 /* nothing to remove */
4058 /** see if a chunkline is a comment line (or empty line) */
4060 chunkline_is_comment_line_or_empty(sldns_buffer* buf)
4062 size_t i, end = sldns_buffer_limit(buf);
4063 for(i=0; i<end; i++) {
4064 char c = (char)sldns_buffer_read_u8_at(buf, i);
4066 return 1; /* comment */
4067 else if(c != ' ' && c != '\t' && c != '\r' && c != '\n')
4068 return 0; /* not a comment */
4070 return 1; /* empty */
4073 /** find a line with ( ) collated */
4075 chunkline_get_line_collated(struct auth_chunk** chunk, size_t* chunk_pos,
4080 sldns_buffer_clear(buf);
4081 pos = sldns_buffer_position(buf);
4082 if(!chunkline_get_line(chunk, chunk_pos, buf)) {
4083 if(sldns_buffer_position(buf) < sldns_buffer_limit(buf))
4084 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4085 else sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf)-1, 0);
4086 sldns_buffer_flip(buf);
4089 parens += chunkline_count_parens(buf, pos);
4091 chunkline_remove_trailcomment(buf, pos);
4092 pos = sldns_buffer_position(buf);
4093 if(!chunkline_get_line(chunk, chunk_pos, buf)) {
4094 if(sldns_buffer_position(buf) < sldns_buffer_limit(buf))
4095 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4096 else sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf)-1, 0);
4097 sldns_buffer_flip(buf);
4100 parens += chunkline_count_parens(buf, pos);
4103 if(sldns_buffer_remaining(buf) < 1) {
4104 verbose(VERB_ALGO, "http chunkline: "
4108 sldns_buffer_write_u8_at(buf, sldns_buffer_position(buf), 0);
4109 sldns_buffer_flip(buf);
4113 /** process $ORIGIN for http */
4115 http_parse_origin(sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4117 char* line = (char*)sldns_buffer_begin(buf);
4118 if(strncmp(line, "$ORIGIN", 7) == 0 &&
4119 isspace((unsigned char)line[7])) {
4121 pstate->origin_len = sizeof(pstate->origin);
4122 s = sldns_str2wire_dname_buf(sldns_strip_ws(line+8),
4123 pstate->origin, &pstate->origin_len);
4124 if(s) pstate->origin_len = 0;
4130 /** process $TTL for http */
4132 http_parse_ttl(sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4134 char* line = (char*)sldns_buffer_begin(buf);
4135 if(strncmp(line, "$TTL", 4) == 0 &&
4136 isspace((unsigned char)line[4])) {
4137 const char* end = NULL;
4138 pstate->default_ttl = sldns_str2period(
4139 sldns_strip_ws(line+5), &end);
4145 /** find noncomment RR line in chunks, collates lines if ( ) format */
4147 chunkline_non_comment_RR(struct auth_chunk** chunk, size_t* chunk_pos,
4148 sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4150 while(chunkline_get_line_collated(chunk, chunk_pos, buf)) {
4151 if(chunkline_is_comment_line_or_empty(buf)) {
4152 /* a comment, go to next line */
4155 if(http_parse_origin(buf, pstate)) {
4156 continue; /* $ORIGIN has been handled */
4158 if(http_parse_ttl(buf, pstate)) {
4159 continue; /* $TTL has been handled */
4163 /* no noncomments, fail */
4167 /** check syntax of chunklist zonefile, parse first RR, return false on
4168 * failure and return a string in the scratch buffer (first RR string)
4171 http_zonefile_syntax_check(struct auth_xfer* xfr, sldns_buffer* buf)
4173 uint8_t rr[LDNS_RR_BUF_SIZE];
4174 size_t rr_len, dname_len = 0;
4175 struct sldns_file_parse_state pstate;
4176 struct auth_chunk* chunk;
4179 memset(&pstate, 0, sizeof(pstate));
4180 pstate.default_ttl = 3600;
4181 if(xfr->namelen < sizeof(pstate.origin)) {
4182 pstate.origin_len = xfr->namelen;
4183 memmove(pstate.origin, xfr->name, xfr->namelen);
4185 chunk = xfr->task_transfer->chunks_first;
4187 if(!chunkline_non_comment_RR(&chunk, &chunk_pos, buf, &pstate)) {
4190 rr_len = sizeof(rr);
4191 e=sldns_str2wire_rr_buf((char*)sldns_buffer_begin(buf), rr, &rr_len,
4192 &dname_len, pstate.default_ttl,
4193 pstate.origin_len?pstate.origin:NULL, pstate.origin_len,
4194 pstate.prev_rr_len?pstate.prev_rr:NULL, pstate.prev_rr_len);
4196 log_err("parse failure on first RR[%d]: %s",
4197 LDNS_WIREPARSE_OFFSET(e),
4198 sldns_get_errorstr_parse(LDNS_WIREPARSE_ERROR(e)));
4201 /* check that class is correct */
4202 if(sldns_wirerr_get_class(rr, rr_len, dname_len) != xfr->dclass) {
4203 log_err("parse failure: first record in downloaded zonefile "
4204 "from wrong RR class");
4210 /** sum sizes of chunklist */
4212 chunklist_sum(struct auth_chunk* list)
4214 struct auth_chunk* p;
4216 for(p=list; p; p=p->next) {
4222 /** remove newlines from collated line */
4224 chunkline_newline_removal(sldns_buffer* buf)
4226 size_t i, end=sldns_buffer_limit(buf);
4227 for(i=0; i<end; i++) {
4228 char c = (char)sldns_buffer_read_u8_at(buf, i);
4229 if(c == '\n' && i==end-1) {
4230 sldns_buffer_write_u8_at(buf, i, 0);
4231 sldns_buffer_set_limit(buf, end-1);
4235 sldns_buffer_write_u8_at(buf, i, (uint8_t)' ');
4239 /** for http download, parse and add RR to zone */
4241 http_parse_add_rr(struct auth_xfer* xfr, struct auth_zone* z,
4242 sldns_buffer* buf, struct sldns_file_parse_state* pstate)
4244 uint8_t rr[LDNS_RR_BUF_SIZE];
4245 size_t rr_len, dname_len = 0;
4247 char* line = (char*)sldns_buffer_begin(buf);
4248 rr_len = sizeof(rr);
4249 e = sldns_str2wire_rr_buf(line, rr, &rr_len, &dname_len,
4250 pstate->default_ttl,
4251 pstate->origin_len?pstate->origin:NULL, pstate->origin_len,
4252 pstate->prev_rr_len?pstate->prev_rr:NULL, pstate->prev_rr_len);
4254 log_err("%s/%s parse failure RR[%d]: %s in '%s'",
4255 xfr->task_transfer->master->host,
4256 xfr->task_transfer->master->file,
4257 LDNS_WIREPARSE_OFFSET(e),
4258 sldns_get_errorstr_parse(LDNS_WIREPARSE_ERROR(e)),
4263 return 1; /* empty line or so */
4266 if(dname_len < sizeof(pstate->prev_rr)) {
4267 memmove(pstate->prev_rr, rr, dname_len);
4268 pstate->prev_rr_len = dname_len;
4271 return az_insert_rr(z, rr, rr_len, dname_len, NULL);
4274 /** RR list iterator, returns RRs from answer section one by one from the
4275 * dns packets in the chunklist */
4277 chunk_rrlist_start(struct auth_xfer* xfr, struct auth_chunk** rr_chunk,
4278 int* rr_num, size_t* rr_pos)
4280 *rr_chunk = xfr->task_transfer->chunks_first;
4285 /** RR list iterator, see if we are at the end of the list */
4287 chunk_rrlist_end(struct auth_chunk* rr_chunk, int rr_num)
4290 if(rr_chunk->len < LDNS_HEADER_SIZE)
4292 if(rr_num < (int)LDNS_ANCOUNT(rr_chunk->data))
4294 /* no more RRs in this chunk */
4295 /* continue with next chunk, see if it has RRs */
4296 rr_chunk = rr_chunk->next;
4302 /** RR list iterator, move to next RR */
4304 chunk_rrlist_gonext(struct auth_chunk** rr_chunk, int* rr_num,
4305 size_t* rr_pos, size_t rr_nextpos)
4307 /* already at end of chunks? */
4310 /* move within this chunk */
4311 if((*rr_chunk)->len >= LDNS_HEADER_SIZE &&
4312 (*rr_num)+1 < (int)LDNS_ANCOUNT((*rr_chunk)->data)) {
4314 *rr_pos = rr_nextpos;
4317 /* no more RRs in this chunk */
4318 /* continue with next chunk, see if it has RRs */
4320 *rr_chunk = (*rr_chunk)->next;
4324 if((*rr_chunk)->len >= LDNS_HEADER_SIZE &&
4325 LDNS_ANCOUNT((*rr_chunk)->data) > 0) {
4328 *rr_chunk = (*rr_chunk)->next;
4332 /** RR iterator, get current RR information, false on parse error */
4334 chunk_rrlist_get_current(struct auth_chunk* rr_chunk, int rr_num,
4335 size_t rr_pos, uint8_t** rr_dname, uint16_t* rr_type,
4336 uint16_t* rr_class, uint32_t* rr_ttl, uint16_t* rr_rdlen,
4337 uint8_t** rr_rdata, size_t* rr_nextpos)
4340 /* integrity checks on position */
4341 if(!rr_chunk) return 0;
4342 if(rr_chunk->len < LDNS_HEADER_SIZE) return 0;
4343 if(rr_num >= (int)LDNS_ANCOUNT(rr_chunk->data)) return 0;
4344 if(rr_pos >= rr_chunk->len) return 0;
4346 /* fetch rr information */
4347 sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
4350 /* skip question section */
4351 sldns_buffer_set_position(&pkt, LDNS_HEADER_SIZE);
4352 for(i=0; i<LDNS_QDCOUNT(rr_chunk->data); i++) {
4353 if(pkt_dname_len(&pkt) == 0) return 0;
4354 if(sldns_buffer_remaining(&pkt) < 4) return 0;
4355 sldns_buffer_skip(&pkt, 4); /* type and class */
4358 sldns_buffer_set_position(&pkt, rr_pos);
4360 *rr_dname = sldns_buffer_current(&pkt);
4361 if(pkt_dname_len(&pkt) == 0) return 0;
4362 if(sldns_buffer_remaining(&pkt) < 10) return 0;
4363 *rr_type = sldns_buffer_read_u16(&pkt);
4364 *rr_class = sldns_buffer_read_u16(&pkt);
4365 *rr_ttl = sldns_buffer_read_u32(&pkt);
4366 *rr_rdlen = sldns_buffer_read_u16(&pkt);
4367 if(sldns_buffer_remaining(&pkt) < (*rr_rdlen)) return 0;
4368 *rr_rdata = sldns_buffer_current(&pkt);
4369 sldns_buffer_skip(&pkt, (ssize_t)(*rr_rdlen));
4370 *rr_nextpos = sldns_buffer_position(&pkt);
4374 /** print log message where we are in parsing the zone transfer */
4376 log_rrlist_position(const char* label, struct auth_chunk* rr_chunk,
4377 uint8_t* rr_dname, uint16_t rr_type, size_t rr_counter)
4384 sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
4385 sldns_buffer_set_position(&pkt, (size_t)(rr_dname -
4386 sldns_buffer_begin(&pkt)));
4387 if((dlen=pkt_dname_len(&pkt)) == 0) return;
4388 if(dlen >= sizeof(buf)) return;
4389 dname_pkt_copy(&pkt, buf, rr_dname);
4390 dname_str(buf, str);
4391 (void)sldns_wire2str_type_buf(rr_type, typestr, sizeof(typestr));
4392 verbose(VERB_ALGO, "%s at[%d] %s %s", label, (int)rr_counter,
4396 /** check that start serial is OK for ixfr. we are at rr_counter == 0,
4397 * and we are going to check rr_counter == 1 (has to be type SOA) serial */
4399 ixfr_start_serial(struct auth_chunk* rr_chunk, int rr_num, size_t rr_pos,
4400 uint8_t* rr_dname, uint16_t rr_type, uint16_t rr_class,
4401 uint32_t rr_ttl, uint16_t rr_rdlen, uint8_t* rr_rdata,
4402 size_t rr_nextpos, uint32_t transfer_serial, uint32_t xfr_serial)
4404 uint32_t startserial;
4405 /* move forward on RR */
4406 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4407 if(chunk_rrlist_end(rr_chunk, rr_num)) {
4409 verbose(VERB_OPS, "IXFR has no second SOA record");
4412 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4413 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4414 &rr_rdata, &rr_nextpos)) {
4415 verbose(VERB_OPS, "IXFR cannot parse second SOA record");
4416 /* failed to parse RR */
4419 if(rr_type != LDNS_RR_TYPE_SOA) {
4420 verbose(VERB_OPS, "IXFR second record is not type SOA");
4424 verbose(VERB_OPS, "IXFR, second SOA has short rdlength");
4425 return 0; /* bad SOA rdlen */
4427 startserial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4428 if(startserial == transfer_serial) {
4429 /* empty AXFR, not an IXFR */
4430 verbose(VERB_OPS, "IXFR second serial same as first");
4433 if(startserial != xfr_serial) {
4434 /* wrong start serial, it does not match the serial in
4436 verbose(VERB_OPS, "IXFR is from serial %u to %u but %u "
4437 "in memory, rejecting the zone transfer",
4438 (unsigned)startserial, (unsigned)transfer_serial,
4439 (unsigned)xfr_serial);
4442 /* everything OK in second SOA serial */
4446 /** apply IXFR to zone in memory. z is locked. false on failure(mallocfail) */
4448 apply_ixfr(struct auth_xfer* xfr, struct auth_zone* z,
4449 struct sldns_buffer* scratch_buffer)
4451 struct auth_chunk* rr_chunk;
4454 uint8_t* rr_dname, *rr_rdata;
4455 uint16_t rr_type, rr_class, rr_rdlen;
4458 int have_transfer_serial = 0;
4459 uint32_t transfer_serial = 0;
4460 size_t rr_counter = 0;
4464 /* start RR iterator over chunklist of packets */
4465 chunk_rrlist_start(xfr, &rr_chunk, &rr_num, &rr_pos);
4466 while(!chunk_rrlist_end(rr_chunk, rr_num)) {
4467 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4468 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4469 &rr_rdata, &rr_nextpos)) {
4470 /* failed to parse RR */
4473 if(verbosity>=7) log_rrlist_position("apply ixfr",
4474 rr_chunk, rr_dname, rr_type, rr_counter);
4475 /* twiddle add/del mode and check for start and end */
4476 if(rr_counter == 0 && rr_type != LDNS_RR_TYPE_SOA)
4478 if(rr_counter == 1 && rr_type != LDNS_RR_TYPE_SOA) {
4479 /* this is an AXFR returned from the IXFR master */
4480 /* but that should already have been detected, by
4481 * on_ixfr_is_axfr */
4484 if(rr_type == LDNS_RR_TYPE_SOA) {
4486 if(rr_rdlen < 22) return 0; /* bad SOA rdlen */
4487 serial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4488 if(have_transfer_serial == 0) {
4489 have_transfer_serial = 1;
4490 transfer_serial = serial;
4491 delmode = 1; /* gets negated below */
4492 /* check second RR before going any further */
4493 if(!ixfr_start_serial(rr_chunk, rr_num, rr_pos,
4494 rr_dname, rr_type, rr_class, rr_ttl,
4495 rr_rdlen, rr_rdata, rr_nextpos,
4496 transfer_serial, xfr->serial)) {
4499 } else if(transfer_serial == serial) {
4500 have_transfer_serial++;
4501 if(rr_counter == 1) {
4502 /* empty AXFR, with SOA; SOA; */
4503 /* should have been detected by
4504 * on_ixfr_is_axfr */
4507 if(have_transfer_serial == 3) {
4508 /* see serial three times for end */
4511 * SOA 1 second RR, followed by del
4512 * SOA 2 followed by add
4513 * SOA 2 followed by del
4514 * SOA 3 followed by add
4516 /* ended by SOA record */
4517 xfr->serial = transfer_serial;
4521 /* twiddle add/del mode */
4522 /* switch from delete part to add part and back again
4523 * just before the soa, it gets deleted and added too
4524 * this means we switch to delete mode for the final
4525 * SOA(so skip that one) */
4528 /* process this RR */
4529 /* if the RR is deleted twice or added twice, then we
4530 * softfail, and continue with the rest of the IXFR, so
4531 * that we serve something fairly nice during the refetch */
4532 if(verbosity>=7) log_rrlist_position((delmode?"del":"add"),
4533 rr_chunk, rr_dname, rr_type, rr_counter);
4535 /* delete this RR */
4537 if(!az_remove_rr_decompress(z, rr_chunk->data,
4538 rr_chunk->len, scratch_buffer, rr_dname,
4539 rr_type, rr_class, rr_ttl, rr_rdata, rr_rdlen,
4541 /* failed, malloc error or so */
4545 /* it was removal of a nonexisting RR */
4546 if(verbosity>=4) log_rrlist_position(
4547 "IXFR error nonexistent RR",
4548 rr_chunk, rr_dname, rr_type, rr_counter);
4551 } else if(rr_counter != 0) {
4552 /* skip first SOA RR for addition, it is added in
4553 * the addition part near the end of the ixfr, when
4554 * that serial is seen the second time. */
4557 if(!az_insert_rr_decompress(z, rr_chunk->data,
4558 rr_chunk->len, scratch_buffer, rr_dname,
4559 rr_type, rr_class, rr_ttl, rr_rdata, rr_rdlen,
4561 /* failed, malloc error or so */
4565 /* it was a duplicate */
4566 if(verbosity>=4) log_rrlist_position(
4567 "IXFR error duplicate RR",
4568 rr_chunk, rr_dname, rr_type, rr_counter);
4574 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4577 verbose(VERB_ALGO, "IXFR did not apply cleanly, fetching full zone");
4583 /** apply AXFR to zone in memory. z is locked. false on failure(mallocfail) */
4585 apply_axfr(struct auth_xfer* xfr, struct auth_zone* z,
4586 struct sldns_buffer* scratch_buffer)
4588 struct auth_chunk* rr_chunk;
4591 uint8_t* rr_dname, *rr_rdata;
4592 uint16_t rr_type, rr_class, rr_rdlen;
4594 uint32_t serial = 0;
4596 size_t rr_counter = 0;
4597 int have_end_soa = 0;
4599 /* clear the data tree */
4600 traverse_postorder(&z->data, auth_data_del, NULL);
4601 rbtree_init(&z->data, &auth_data_cmp);
4605 /* insert all RRs in to the zone */
4606 /* insert the SOA only once, skip the last one */
4607 /* start RR iterator over chunklist of packets */
4608 chunk_rrlist_start(xfr, &rr_chunk, &rr_num, &rr_pos);
4609 while(!chunk_rrlist_end(rr_chunk, rr_num)) {
4610 if(!chunk_rrlist_get_current(rr_chunk, rr_num, rr_pos,
4611 &rr_dname, &rr_type, &rr_class, &rr_ttl, &rr_rdlen,
4612 &rr_rdata, &rr_nextpos)) {
4613 /* failed to parse RR */
4616 if(verbosity>=7) log_rrlist_position("apply_axfr",
4617 rr_chunk, rr_dname, rr_type, rr_counter);
4618 if(rr_type == LDNS_RR_TYPE_SOA) {
4619 if(rr_counter != 0) {
4620 /* end of the axfr */
4624 if(rr_rdlen < 22) return 0; /* bad SOA rdlen */
4625 serial = sldns_read_uint32(rr_rdata+rr_rdlen-20);
4629 if(!az_insert_rr_decompress(z, rr_chunk->data, rr_chunk->len,
4630 scratch_buffer, rr_dname, rr_type, rr_class, rr_ttl,
4631 rr_rdata, rr_rdlen, NULL)) {
4632 /* failed, malloc error or so */
4637 chunk_rrlist_gonext(&rr_chunk, &rr_num, &rr_pos, rr_nextpos);
4640 log_err("no end SOA record for AXFR");
4644 xfr->serial = serial;
4649 /** apply HTTP to zone in memory. z is locked. false on failure(mallocfail) */
4651 apply_http(struct auth_xfer* xfr, struct auth_zone* z,
4652 struct sldns_buffer* scratch_buffer)
4654 /* parse data in chunks */
4655 /* parse RR's and read into memory. ignore $INCLUDE from the
4657 struct sldns_file_parse_state pstate;
4658 struct auth_chunk* chunk;
4660 memset(&pstate, 0, sizeof(pstate));
4661 pstate.default_ttl = 3600;
4662 if(xfr->namelen < sizeof(pstate.origin)) {
4663 pstate.origin_len = xfr->namelen;
4664 memmove(pstate.origin, xfr->name, xfr->namelen);
4667 if(verbosity >= VERB_ALGO)
4668 verbose(VERB_ALGO, "http download %s of size %d",
4669 xfr->task_transfer->master->file,
4670 (int)chunklist_sum(xfr->task_transfer->chunks_first));
4671 if(xfr->task_transfer->chunks_first && verbosity >= VERB_ALGO) {
4673 if(xfr->task_transfer->chunks_first->len+1 > sizeof(preview)) {
4674 memmove(preview, xfr->task_transfer->chunks_first->data,
4676 preview[sizeof(preview)-1]=0;
4678 memmove(preview, xfr->task_transfer->chunks_first->data,
4679 xfr->task_transfer->chunks_first->len);
4680 preview[xfr->task_transfer->chunks_first->len]=0;
4682 log_info("auth zone http downloaded content preview: %s",
4686 /* perhaps a little syntax check before we try to apply the data? */
4687 if(!http_zonefile_syntax_check(xfr, scratch_buffer)) {
4688 log_err("http download %s/%s does not contain a zonefile, "
4689 "but got '%s'", xfr->task_transfer->master->host,
4690 xfr->task_transfer->master->file,
4691 sldns_buffer_begin(scratch_buffer));
4695 /* clear the data tree */
4696 traverse_postorder(&z->data, auth_data_del, NULL);
4697 rbtree_init(&z->data, &auth_data_cmp);
4701 chunk = xfr->task_transfer->chunks_first;
4704 while(chunkline_get_line_collated(&chunk, &chunk_pos, scratch_buffer)) {
4705 /* process this line */
4707 chunkline_newline_removal(scratch_buffer);
4708 if(chunkline_is_comment_line_or_empty(scratch_buffer)) {
4711 /* parse line and add RR */
4712 if(http_parse_origin(scratch_buffer, &pstate)) {
4713 continue; /* $ORIGIN has been handled */
4715 if(http_parse_ttl(scratch_buffer, &pstate)) {
4716 continue; /* $TTL has been handled */
4718 if(!http_parse_add_rr(xfr, z, scratch_buffer, &pstate)) {
4719 verbose(VERB_ALGO, "error parsing line [%s:%d] %s",
4720 xfr->task_transfer->master->file,
4722 sldns_buffer_begin(scratch_buffer));
4729 /** write http chunks to zonefile to create downloaded file */
4731 auth_zone_write_chunks(struct auth_xfer* xfr, const char* fname)
4734 struct auth_chunk* p;
4735 out = fopen(fname, "w");
4737 log_err("could not open %s: %s", fname, strerror(errno));
4740 for(p = xfr->task_transfer->chunks_first; p ; p = p->next) {
4741 if(!write_out(out, (char*)p->data, p->len)) {
4742 log_err("could not write http download to %s", fname);
4751 /** write to zonefile after zone has been updated */
4753 xfr_write_after_update(struct auth_xfer* xfr, struct module_env* env)
4755 struct auth_zone* z;
4757 lock_basic_unlock(&xfr->lock);
4759 /* get lock again, so it is a readlock and concurrently queries
4760 * can be answered */
4761 lock_rw_rdlock(&env->auth_zones->lock);
4762 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
4765 lock_rw_unlock(&env->auth_zones->lock);
4766 /* the zone is gone, ignore xfr results */
4767 lock_basic_lock(&xfr->lock);
4770 lock_rw_rdlock(&z->lock);
4771 lock_basic_lock(&xfr->lock);
4772 lock_rw_unlock(&env->auth_zones->lock);
4774 if(z->zonefile == NULL) {
4775 lock_rw_unlock(&z->lock);
4776 /* no write needed, no zonefile set */
4780 /* write to tempfile first */
4781 if((size_t)strlen(z->zonefile) + 16 > sizeof(tmpfile)) {
4782 verbose(VERB_ALGO, "tmpfilename too long, cannot update "
4783 " zonefile %s", z->zonefile);
4784 lock_rw_unlock(&z->lock);
4787 snprintf(tmpfile, sizeof(tmpfile), "%s.tmp%u", z->zonefile,
4788 (unsigned)getpid());
4789 if(xfr->task_transfer->master->http) {
4790 /* use the stored chunk list to write them */
4791 if(!auth_zone_write_chunks(xfr, tmpfile)) {
4793 lock_rw_unlock(&z->lock);
4795 } else if(!auth_zone_write_file(z, tmpfile)) {
4797 lock_rw_unlock(&z->lock);
4800 if(rename(tmpfile, z->zonefile) < 0) {
4801 log_err("could not rename(%s, %s): %s", tmpfile, z->zonefile,
4804 lock_rw_unlock(&z->lock);
4807 lock_rw_unlock(&z->lock);
4810 /** process chunk list and update zone in memory,
4811 * return false if it did not work */
4813 xfr_process_chunk_list(struct auth_xfer* xfr, struct module_env* env,
4816 struct auth_zone* z;
4818 /* obtain locks and structures */
4819 /* release xfr lock, then, while holding az->lock grab both
4820 * z->lock and xfr->lock */
4821 lock_basic_unlock(&xfr->lock);
4822 lock_rw_rdlock(&env->auth_zones->lock);
4823 z = auth_zone_find(env->auth_zones, xfr->name, xfr->namelen,
4826 lock_rw_unlock(&env->auth_zones->lock);
4827 /* the zone is gone, ignore xfr results */
4828 lock_basic_lock(&xfr->lock);
4831 lock_rw_wrlock(&z->lock);
4832 lock_basic_lock(&xfr->lock);
4833 lock_rw_unlock(&env->auth_zones->lock);
4836 if(xfr->task_transfer->master->http) {
4837 if(!apply_http(xfr, z, env->scratch_buffer)) {
4838 lock_rw_unlock(&z->lock);
4839 verbose(VERB_ALGO, "http from %s: could not store data",
4840 xfr->task_transfer->master->host);
4843 } else if(xfr->task_transfer->on_ixfr &&
4844 !xfr->task_transfer->on_ixfr_is_axfr) {
4845 if(!apply_ixfr(xfr, z, env->scratch_buffer)) {
4846 lock_rw_unlock(&z->lock);
4847 verbose(VERB_ALGO, "xfr from %s: could not store IXFR"
4848 " data", xfr->task_transfer->master->host);
4853 if(!apply_axfr(xfr, z, env->scratch_buffer)) {
4854 lock_rw_unlock(&z->lock);
4855 verbose(VERB_ALGO, "xfr from %s: could not store AXFR"
4856 " data", xfr->task_transfer->master->host);
4860 xfr->zone_expired = 0;
4861 z->zone_expired = 0;
4862 if(!xfr_find_soa(z, xfr)) {
4863 lock_rw_unlock(&z->lock);
4864 verbose(VERB_ALGO, "xfr from %s: no SOA in zone after update"
4865 " (or malformed RR)", xfr->task_transfer->master->host);
4869 xfr->lease_time = *env->now;
4872 lock_rw_unlock(&z->lock);
4874 if(verbosity >= VERB_QUERY && xfr->have_zone) {
4876 dname_str(xfr->name, zname);
4877 verbose(VERB_QUERY, "auth zone %s updated to serial %u", zname,
4878 (unsigned)xfr->serial);
4880 /* see if we need to write to a zonefile */
4881 xfr_write_after_update(xfr, env);
4885 /** disown task_transfer. caller must hold xfr.lock */
4887 xfr_transfer_disown(struct auth_xfer* xfr)
4889 /* remove the commpoint */
4890 comm_point_delete(xfr->task_transfer->cp);
4891 xfr->task_transfer->cp = NULL;
4892 /* we don't own this item anymore */
4893 xfr->task_transfer->worker = NULL;
4894 xfr->task_transfer->env = NULL;
4897 /** lookup a host name for its addresses, if needed */
4899 xfr_transfer_lookup_host(struct auth_xfer* xfr, struct module_env* env)
4901 struct sockaddr_storage addr;
4902 socklen_t addrlen = 0;
4903 struct auth_master* master = xfr->task_transfer->lookup_target;
4904 struct query_info qinfo;
4905 uint16_t qflags = BIT_RD;
4906 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
4907 struct edns_data edns;
4908 sldns_buffer* buf = env->scratch_buffer;
4909 if(!master) return 0;
4910 if(extstrtoaddr(master->host, &addr, &addrlen)) {
4911 /* not needed, host is in IP addr format */
4914 if(master->allow_notify)
4915 return 0; /* allow-notifies are not transferred from, no
4918 /* use mesh_new_callback to probe for non-addr hosts,
4919 * and then wait for them to be looked up (in cache, or query) */
4920 qinfo.qname_len = sizeof(dname);
4921 if(sldns_str2wire_dname_buf(master->host, dname, &qinfo.qname_len)
4923 log_err("cannot parse host name of master %s", master->host);
4926 qinfo.qname = dname;
4927 qinfo.qclass = xfr->dclass;
4928 qinfo.qtype = LDNS_RR_TYPE_A;
4929 if(xfr->task_transfer->lookup_aaaa)
4930 qinfo.qtype = LDNS_RR_TYPE_AAAA;
4931 qinfo.local_alias = NULL;
4932 if(verbosity >= VERB_ALGO) {
4934 char buf2[LDNS_MAX_DOMAINLEN+1];
4935 dname_str(xfr->name, buf2);
4936 snprintf(buf, sizeof(buf), "auth zone %s: master lookup"
4937 " for task_transfer", buf2);
4938 log_query_info(VERB_ALGO, buf, &qinfo);
4940 edns.edns_present = 1;
4942 edns.edns_version = 0;
4943 edns.bits = EDNS_DO;
4944 edns.opt_list = NULL;
4945 if(sldns_buffer_capacity(buf) < 65535)
4946 edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
4947 else edns.udp_size = 65535;
4949 /* unlock xfr during mesh_new_callback() because the callback can be
4950 * called straight away */
4951 lock_basic_unlock(&xfr->lock);
4952 if(!mesh_new_callback(env->mesh, &qinfo, qflags, &edns, buf, 0,
4953 &auth_xfer_transfer_lookup_callback, xfr)) {
4954 lock_basic_lock(&xfr->lock);
4955 log_err("out of memory lookup up master %s", master->host);
4958 lock_basic_lock(&xfr->lock);
4962 /** initiate TCP to the target and fetch zone.
4963 * returns true if that was successfully started, and timeout setup. */
4965 xfr_transfer_init_fetch(struct auth_xfer* xfr, struct module_env* env)
4967 struct sockaddr_storage addr;
4968 socklen_t addrlen = 0;
4969 struct auth_master* master = xfr->task_transfer->master;
4970 if(!master) return 0;
4971 if(master->allow_notify) return 0; /* only for notify */
4973 /* get master addr */
4974 if(xfr->task_transfer->scan_addr) {
4975 addrlen = xfr->task_transfer->scan_addr->addrlen;
4976 memmove(&addr, &xfr->task_transfer->scan_addr->addr, addrlen);
4978 if(!extstrtoaddr(master->host, &addr, &addrlen)) {
4979 /* the ones that are not in addr format are supposed
4980 * to be looked up. The lookup has failed however,
4983 dname_str(xfr->name, zname);
4984 log_err("%s: failed lookup, cannot transfer from master %s",
4985 zname, master->host);
4990 /* remove previous TCP connection (if any) */
4991 if(xfr->task_transfer->cp) {
4992 comm_point_delete(xfr->task_transfer->cp);
4993 xfr->task_transfer->cp = NULL;
4997 /* perform http fetch */
4998 /* store http port number into sockaddr,
4999 * unless someone used unbound's host@port notation */
5000 if(strchr(master->host, '@') == NULL)
5001 sockaddr_store_port(&addr, addrlen, master->port);
5002 xfr->task_transfer->cp = outnet_comm_point_for_http(
5003 env->outnet, auth_xfer_transfer_http_callback, xfr,
5004 &addr, addrlen, AUTH_TRANSFER_TIMEOUT, master->ssl,
5005 master->host, master->file);
5006 if(!xfr->task_transfer->cp) {
5008 dname_str(xfr->name, zname);
5009 verbose(VERB_ALGO, "cannot create http cp "
5010 "connection for %s to %s", zname,
5017 /* perform AXFR/IXFR */
5018 /* set the packet to be written */
5020 xfr->task_transfer->id = (uint16_t)(ub_random(env->rnd)&0xffff);
5021 xfr_create_ixfr_packet(xfr, env->scratch_buffer,
5022 xfr->task_transfer->id, master);
5025 xfr->task_transfer->cp = outnet_comm_point_for_tcp(env->outnet,
5026 auth_xfer_transfer_tcp_callback, xfr, &addr, addrlen,
5027 env->scratch_buffer, AUTH_TRANSFER_TIMEOUT);
5028 if(!xfr->task_transfer->cp) {
5030 dname_str(xfr->name, zname);
5031 verbose(VERB_ALGO, "cannot create tcp cp connection for "
5032 "xfr %s to %s", zname, master->host);
5038 /** perform next lookup, next transfer TCP, or end and resume wait time task */
5040 xfr_transfer_nexttarget_or_end(struct auth_xfer* xfr, struct module_env* env)
5042 log_assert(xfr->task_transfer->worker == env->worker);
5044 /* are we performing lookups? */
5045 while(xfr->task_transfer->lookup_target) {
5046 if(xfr_transfer_lookup_host(xfr, env)) {
5047 /* wait for lookup to finish,
5048 * note that the hostname may be in unbound's cache
5049 * and we may then get an instant cache response,
5050 * and that calls the callback just like a full
5051 * lookup and lookup failures also call callback */
5052 lock_basic_unlock(&xfr->lock);
5055 xfr_transfer_move_to_next_lookup(xfr, env);
5058 /* initiate TCP and fetch the zone from the master */
5059 /* and set timeout on it */
5060 while(!xfr_transfer_end_of_list(xfr)) {
5061 xfr->task_transfer->master = xfr_transfer_current_master(xfr);
5062 if(xfr_transfer_init_fetch(xfr, env)) {
5063 /* successfully started, wait for callback */
5064 lock_basic_unlock(&xfr->lock);
5067 /* failed to fetch, next master */
5068 xfr_transfer_nextmaster(xfr);
5071 /* we failed to fetch the zone, move to wait task
5072 * use the shorter retry timeout */
5073 xfr_transfer_disown(xfr);
5075 /* pick up the nextprobe task and wait */
5076 xfr_set_timeout(xfr, env, 1, 0);
5077 lock_basic_unlock(&xfr->lock);
5080 /** add addrs from A or AAAA rrset to the master */
5082 xfr_master_add_addrs(struct auth_master* m, struct ub_packed_rrset_key* rrset,
5086 struct packed_rrset_data* data;
5087 if(!m || !rrset) return;
5088 if(rrtype != LDNS_RR_TYPE_A && rrtype != LDNS_RR_TYPE_AAAA)
5090 data = (struct packed_rrset_data*)rrset->entry.data;
5091 for(i=0; i<data->count; i++) {
5092 struct auth_addr* a;
5093 size_t len = data->rr_len[i] - 2;
5094 uint8_t* rdata = data->rr_data[i]+2;
5095 if(rrtype == LDNS_RR_TYPE_A && len != INET_SIZE)
5096 continue; /* wrong length for A */
5097 if(rrtype == LDNS_RR_TYPE_AAAA && len != INET6_SIZE)
5098 continue; /* wrong length for AAAA */
5100 /* add and alloc it */
5101 a = (struct auth_addr*)calloc(1, sizeof(*a));
5103 log_err("out of memory");
5106 if(rrtype == LDNS_RR_TYPE_A) {
5107 struct sockaddr_in* sa;
5108 a->addrlen = (socklen_t)sizeof(*sa);
5109 sa = (struct sockaddr_in*)&a->addr;
5110 sa->sin_family = AF_INET;
5111 sa->sin_port = (in_port_t)htons(UNBOUND_DNS_PORT);
5112 memmove(&sa->sin_addr, rdata, INET_SIZE);
5114 struct sockaddr_in6* sa;
5115 a->addrlen = (socklen_t)sizeof(*sa);
5116 sa = (struct sockaddr_in6*)&a->addr;
5117 sa->sin6_family = AF_INET6;
5118 sa->sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT);
5119 memmove(&sa->sin6_addr, rdata, INET6_SIZE);
5121 if(verbosity >= VERB_ALGO) {
5123 addr_to_str(&a->addr, a->addrlen, s, sizeof(s));
5124 verbose(VERB_ALGO, "auth host %s lookup %s",
5127 /* append to list */
5133 /** callback for task_transfer lookup of host name, of A or AAAA */
5134 void auth_xfer_transfer_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
5135 enum sec_status ATTR_UNUSED(sec), char* ATTR_UNUSED(why_bogus))
5137 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5138 struct module_env* env;
5139 log_assert(xfr->task_transfer);
5140 lock_basic_lock(&xfr->lock);
5141 env = xfr->task_transfer->env;
5142 if(env->outnet->want_to_quit) {
5143 lock_basic_unlock(&xfr->lock);
5144 return; /* stop on quit */
5147 /* process result */
5148 if(rcode == LDNS_RCODE_NOERROR) {
5149 uint16_t wanted_qtype = LDNS_RR_TYPE_A;
5150 struct regional* temp = env->scratch;
5151 struct query_info rq;
5152 struct reply_info* rep;
5153 if(xfr->task_transfer->lookup_aaaa)
5154 wanted_qtype = LDNS_RR_TYPE_AAAA;
5155 memset(&rq, 0, sizeof(rq));
5156 rep = parse_reply_in_temp_region(buf, temp, &rq);
5157 if(rep && rq.qtype == wanted_qtype &&
5158 FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_NOERROR) {
5159 /* parsed successfully */
5160 struct ub_packed_rrset_key* answer =
5161 reply_find_answer_rrset(&rq, rep);
5163 xfr_master_add_addrs(xfr->task_transfer->
5164 lookup_target, answer, wanted_qtype);
5168 if(xfr->task_transfer->lookup_target->list &&
5169 xfr->task_transfer->lookup_target == xfr_transfer_current_master(xfr))
5170 xfr->task_transfer->scan_addr = xfr->task_transfer->lookup_target->list;
5172 /* move to lookup AAAA after A lookup, move to next hostname lookup,
5173 * or move to fetch the zone, or, if nothing to do, end task_transfer */
5174 xfr_transfer_move_to_next_lookup(xfr, env);
5175 xfr_transfer_nexttarget_or_end(xfr, env);
5178 /** check if xfer (AXFR or IXFR) packet is OK.
5179 * return false if we lost connection (SERVFAIL, or unreadable).
5180 * return false if we need to move from IXFR to AXFR, with gonextonfail
5181 * set to false, so the same master is tried again, but with AXFR.
5182 * return true if fine to link into data.
5183 * return true with transferdone=true when the transfer has ended.
5186 check_xfer_packet(sldns_buffer* pkt, struct auth_xfer* xfr,
5187 int* gonextonfail, int* transferdone)
5189 uint8_t* wire = sldns_buffer_begin(pkt);
5191 if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE) {
5192 verbose(VERB_ALGO, "xfr to %s failed, packet too small",
5193 xfr->task_transfer->master->host);
5196 if(!LDNS_QR_WIRE(wire)) {
5197 verbose(VERB_ALGO, "xfr to %s failed, packet has no QR flag",
5198 xfr->task_transfer->master->host);
5201 if(LDNS_TC_WIRE(wire)) {
5202 verbose(VERB_ALGO, "xfr to %s failed, packet has TC flag",
5203 xfr->task_transfer->master->host);
5207 if(LDNS_ID_WIRE(wire) != xfr->task_transfer->id) {
5208 verbose(VERB_ALGO, "xfr to %s failed, packet wrong ID",
5209 xfr->task_transfer->master->host);
5212 if(LDNS_RCODE_WIRE(wire) != LDNS_RCODE_NOERROR) {
5214 sldns_wire2str_rcode_buf((int)LDNS_RCODE_WIRE(wire), rcode,
5216 /* if we are doing IXFR, check for fallback */
5217 if(xfr->task_transfer->on_ixfr) {
5218 if(LDNS_RCODE_WIRE(wire) == LDNS_RCODE_NOTIMPL ||
5219 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_SERVFAIL ||
5220 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_REFUSED ||
5221 LDNS_RCODE_WIRE(wire) == LDNS_RCODE_FORMERR) {
5222 verbose(VERB_ALGO, "xfr to %s, fallback "
5223 "from IXFR to AXFR (with rcode %s)",
5224 xfr->task_transfer->master->host,
5226 xfr->task_transfer->ixfr_fail = 1;
5231 verbose(VERB_ALGO, "xfr to %s failed, packet with rcode %s",
5232 xfr->task_transfer->master->host, rcode);
5235 if(LDNS_OPCODE_WIRE(wire) != LDNS_PACKET_QUERY) {
5236 verbose(VERB_ALGO, "xfr to %s failed, packet with bad opcode",
5237 xfr->task_transfer->master->host);
5240 if(LDNS_QDCOUNT(wire) > 1) {
5241 verbose(VERB_ALGO, "xfr to %s failed, packet has qdcount %d",
5242 xfr->task_transfer->master->host,
5243 (int)LDNS_QDCOUNT(wire));
5248 sldns_buffer_set_position(pkt, LDNS_HEADER_SIZE);
5249 for(i=0; i<(int)LDNS_QDCOUNT(wire); i++) {
5250 size_t pos = sldns_buffer_position(pkt);
5251 uint16_t qtype, qclass;
5252 if(pkt_dname_len(pkt) == 0) {
5253 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5255 xfr->task_transfer->master->host);
5258 if(dname_pkt_compare(pkt, sldns_buffer_at(pkt, pos),
5260 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5262 xfr->task_transfer->master->host);
5265 if(sldns_buffer_remaining(pkt) < 4) {
5266 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5267 "truncated query RR",
5268 xfr->task_transfer->master->host);
5271 qtype = sldns_buffer_read_u16(pkt);
5272 qclass = sldns_buffer_read_u16(pkt);
5273 if(qclass != xfr->dclass) {
5274 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5276 xfr->task_transfer->master->host);
5279 if(xfr->task_transfer->on_ixfr) {
5280 if(qtype != LDNS_RR_TYPE_IXFR) {
5281 verbose(VERB_ALGO, "xfr to %s failed, packet "
5282 "with wrong qtype, expected IXFR",
5283 xfr->task_transfer->master->host);
5287 if(qtype != LDNS_RR_TYPE_AXFR) {
5288 verbose(VERB_ALGO, "xfr to %s failed, packet "
5289 "with wrong qtype, expected AXFR",
5290 xfr->task_transfer->master->host);
5296 /* check parse of RRs in packet, store first SOA serial
5297 * to be able to detect last SOA (with that serial) to see if done */
5298 /* also check for IXFR 'zone up to date' reply */
5299 for(i=0; i<(int)LDNS_ANCOUNT(wire); i++) {
5300 size_t pos = sldns_buffer_position(pkt);
5302 if(pkt_dname_len(pkt) == 0) {
5303 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5304 "malformed dname in answer section",
5305 xfr->task_transfer->master->host);
5308 if(sldns_buffer_remaining(pkt) < 10) {
5309 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5311 xfr->task_transfer->master->host);
5314 tp = sldns_buffer_read_u16(pkt);
5315 (void)sldns_buffer_read_u16(pkt); /* class */
5316 (void)sldns_buffer_read_u32(pkt); /* ttl */
5317 rdlen = sldns_buffer_read_u16(pkt);
5318 if(sldns_buffer_remaining(pkt) < rdlen) {
5319 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5320 "truncated RR rdata",
5321 xfr->task_transfer->master->host);
5325 /* RR parses (haven't checked rdata itself), now look at
5326 * SOA records to see serial number */
5327 if(xfr->task_transfer->rr_scan_num == 0 &&
5328 tp != LDNS_RR_TYPE_SOA) {
5329 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5330 "malformed zone transfer, no start SOA",
5331 xfr->task_transfer->master->host);
5334 if(xfr->task_transfer->rr_scan_num == 1 &&
5335 tp != LDNS_RR_TYPE_SOA) {
5336 /* second RR is not a SOA record, this is not an IXFR
5337 * the master is replying with an AXFR */
5338 xfr->task_transfer->on_ixfr_is_axfr = 1;
5340 if(tp == LDNS_RR_TYPE_SOA) {
5343 verbose(VERB_ALGO, "xfr to %s failed, packet "
5344 "with SOA with malformed rdata",
5345 xfr->task_transfer->master->host);
5348 if(dname_pkt_compare(pkt, sldns_buffer_at(pkt, pos),
5350 verbose(VERB_ALGO, "xfr to %s failed, packet "
5351 "with SOA with wrong dname",
5352 xfr->task_transfer->master->host);
5356 /* read serial number of SOA */
5357 serial = sldns_buffer_read_u32_at(pkt,
5358 sldns_buffer_position(pkt)+rdlen-20);
5360 /* check for IXFR 'zone has SOA x' reply */
5361 if(xfr->task_transfer->on_ixfr &&
5362 xfr->task_transfer->rr_scan_num == 0 &&
5363 LDNS_ANCOUNT(wire)==1) {
5364 verbose(VERB_ALGO, "xfr to %s ended, "
5365 "IXFR reply that zone has serial %u",
5366 xfr->task_transfer->master->host,
5371 /* if first SOA, store serial number */
5372 if(xfr->task_transfer->got_xfr_serial == 0) {
5373 xfr->task_transfer->got_xfr_serial = 1;
5374 xfr->task_transfer->incoming_xfr_serial =
5376 verbose(VERB_ALGO, "xfr %s: contains "
5378 xfr->task_transfer->master->host,
5380 /* see if end of AXFR */
5381 } else if(!xfr->task_transfer->on_ixfr ||
5382 xfr->task_transfer->on_ixfr_is_axfr) {
5383 /* second SOA with serial is the end
5386 verbose(VERB_ALGO, "xfr %s: last AXFR packet",
5387 xfr->task_transfer->master->host);
5388 /* for IXFR, count SOA records with that serial */
5389 } else if(xfr->task_transfer->incoming_xfr_serial ==
5390 serial && xfr->task_transfer->got_xfr_serial
5392 xfr->task_transfer->got_xfr_serial++;
5393 /* if not first soa, if serial==firstserial, the
5394 * third time we are at the end, for IXFR */
5395 } else if(xfr->task_transfer->incoming_xfr_serial ==
5396 serial && xfr->task_transfer->got_xfr_serial
5398 verbose(VERB_ALGO, "xfr %s: last IXFR packet",
5399 xfr->task_transfer->master->host);
5401 /* continue parse check, if that succeeds,
5402 * transfer is done */
5405 xfr->task_transfer->rr_scan_num++;
5407 /* skip over RR rdata to go to the next RR */
5408 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5411 /* check authority section */
5412 /* we skip over the RRs checking packet format */
5413 for(i=0; i<(int)LDNS_NSCOUNT(wire); i++) {
5415 if(pkt_dname_len(pkt) == 0) {
5416 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5417 "malformed dname in authority section",
5418 xfr->task_transfer->master->host);
5421 if(sldns_buffer_remaining(pkt) < 10) {
5422 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5424 xfr->task_transfer->master->host);
5427 (void)sldns_buffer_read_u16(pkt); /* type */
5428 (void)sldns_buffer_read_u16(pkt); /* class */
5429 (void)sldns_buffer_read_u32(pkt); /* ttl */
5430 rdlen = sldns_buffer_read_u16(pkt);
5431 if(sldns_buffer_remaining(pkt) < rdlen) {
5432 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5433 "truncated RR rdata",
5434 xfr->task_transfer->master->host);
5437 /* skip over RR rdata to go to the next RR */
5438 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5441 /* check additional section */
5442 for(i=0; i<(int)LDNS_ARCOUNT(wire); i++) {
5444 if(pkt_dname_len(pkt) == 0) {
5445 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5446 "malformed dname in additional section",
5447 xfr->task_transfer->master->host);
5450 if(sldns_buffer_remaining(pkt) < 10) {
5451 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5453 xfr->task_transfer->master->host);
5456 (void)sldns_buffer_read_u16(pkt); /* type */
5457 (void)sldns_buffer_read_u16(pkt); /* class */
5458 (void)sldns_buffer_read_u32(pkt); /* ttl */
5459 rdlen = sldns_buffer_read_u16(pkt);
5460 if(sldns_buffer_remaining(pkt) < rdlen) {
5461 verbose(VERB_ALGO, "xfr to %s failed, packet with "
5462 "truncated RR rdata",
5463 xfr->task_transfer->master->host);
5466 /* skip over RR rdata to go to the next RR */
5467 sldns_buffer_skip(pkt, (ssize_t)rdlen);
5473 /** Link the data from this packet into the worklist of transferred data */
5475 xfer_link_data(sldns_buffer* pkt, struct auth_xfer* xfr)
5478 struct auth_chunk* e;
5479 e = (struct auth_chunk*)calloc(1, sizeof(*e));
5482 e->len = sldns_buffer_limit(pkt);
5483 e->data = memdup(sldns_buffer_begin(pkt), e->len);
5489 /* alloc succeeded, link into list */
5490 if(!xfr->task_transfer->chunks_first)
5491 xfr->task_transfer->chunks_first = e;
5492 if(xfr->task_transfer->chunks_last)
5493 xfr->task_transfer->chunks_last->next = e;
5494 xfr->task_transfer->chunks_last = e;
5498 /** task transfer. the list of data is complete. process it and if failed
5499 * move to next master, if succeeded, end the task transfer */
5501 process_list_end_transfer(struct auth_xfer* xfr, struct module_env* env)
5504 if(xfr_process_chunk_list(xfr, env, &ixfr_fail)) {
5506 auth_chunks_delete(xfr->task_transfer);
5508 /* we fetched the zone, move to wait task */
5509 xfr_transfer_disown(xfr);
5511 if(xfr->notify_received && (!xfr->notify_has_serial ||
5512 (xfr->notify_has_serial &&
5513 xfr_serial_means_update(xfr, xfr->notify_serial)))) {
5514 uint32_t sr = xfr->notify_serial;
5515 int has_sr = xfr->notify_has_serial;
5516 /* we received a notify while probe/transfer was
5517 * in progress. start a new probe and transfer */
5518 xfr->notify_received = 0;
5519 xfr->notify_has_serial = 0;
5520 xfr->notify_serial = 0;
5521 if(!xfr_start_probe(xfr, env, NULL)) {
5522 /* if we couldn't start it, already in
5523 * progress; restore notify serial,
5524 * while xfr still locked */
5525 xfr->notify_received = 1;
5526 xfr->notify_has_serial = has_sr;
5527 xfr->notify_serial = sr;
5528 lock_basic_unlock(&xfr->lock);
5532 /* pick up the nextprobe task and wait (normail wait time) */
5533 xfr_set_timeout(xfr, env, 0, 0);
5535 lock_basic_unlock(&xfr->lock);
5538 /* processing failed */
5539 /* when done, delete data from list */
5540 auth_chunks_delete(xfr->task_transfer);
5542 xfr->task_transfer->ixfr_fail = 1;
5544 xfr_transfer_nextmaster(xfr);
5546 xfr_transfer_nexttarget_or_end(xfr, env);
5549 /** callback for task_transfer tcp connections */
5551 auth_xfer_transfer_tcp_callback(struct comm_point* c, void* arg, int err,
5552 struct comm_reply* ATTR_UNUSED(repinfo))
5554 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5555 struct module_env* env;
5556 int gonextonfail = 1;
5557 int transferdone = 0;
5558 log_assert(xfr->task_transfer);
5559 lock_basic_lock(&xfr->lock);
5560 env = xfr->task_transfer->env;
5561 if(env->outnet->want_to_quit) {
5562 lock_basic_unlock(&xfr->lock);
5563 return 0; /* stop on quit */
5566 if(err != NETEVENT_NOERROR) {
5567 /* connection failed, closed, or timeout */
5568 /* stop this transfer, cleanup
5569 * and continue task_transfer*/
5570 verbose(VERB_ALGO, "xfr stopped, connection lost to %s",
5571 xfr->task_transfer->master->host);
5573 /* delete transferred data from list */
5574 auth_chunks_delete(xfr->task_transfer);
5575 comm_point_delete(xfr->task_transfer->cp);
5576 xfr->task_transfer->cp = NULL;
5577 xfr_transfer_nextmaster(xfr);
5578 xfr_transfer_nexttarget_or_end(xfr, env);
5582 /* handle returned packet */
5583 /* if it fails, cleanup and end this transfer */
5584 /* if it needs to fallback from IXFR to AXFR, do that */
5585 if(!check_xfer_packet(c->buffer, xfr, &gonextonfail, &transferdone)) {
5588 /* if it is good, link it into the list of data */
5589 /* if the link into list of data fails (malloc fail) cleanup and end */
5590 if(!xfer_link_data(c->buffer, xfr)) {
5591 verbose(VERB_ALGO, "xfr stopped to %s, malloc failed",
5592 xfr->task_transfer->master->host);
5595 /* if the transfer is done now, disconnect and process the list */
5597 comm_point_delete(xfr->task_transfer->cp);
5598 xfr->task_transfer->cp = NULL;
5599 process_list_end_transfer(xfr, env);
5603 /* if we want to read more messages, setup the commpoint to read
5604 * a DNS packet, and the timeout */
5605 lock_basic_unlock(&xfr->lock);
5606 c->tcp_is_reading = 1;
5607 sldns_buffer_clear(c->buffer);
5608 comm_point_start_listening(c, -1, AUTH_TRANSFER_TIMEOUT);
5612 /** callback for task_transfer http connections */
5614 auth_xfer_transfer_http_callback(struct comm_point* c, void* arg, int err,
5615 struct comm_reply* repinfo)
5617 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5618 struct module_env* env;
5619 log_assert(xfr->task_transfer);
5620 lock_basic_lock(&xfr->lock);
5621 env = xfr->task_transfer->env;
5622 if(env->outnet->want_to_quit) {
5623 lock_basic_unlock(&xfr->lock);
5624 return 0; /* stop on quit */
5626 verbose(VERB_ALGO, "auth zone transfer http callback");
5628 if(err != NETEVENT_NOERROR && err != NETEVENT_DONE) {
5629 /* connection failed, closed, or timeout */
5630 /* stop this transfer, cleanup
5631 * and continue task_transfer*/
5632 verbose(VERB_ALGO, "http stopped, connection lost to %s",
5633 xfr->task_transfer->master->host);
5635 /* delete transferred data from list */
5636 auth_chunks_delete(xfr->task_transfer);
5637 if(repinfo) repinfo->c = NULL; /* signal cp deleted to
5638 the routine calling this callback */
5639 comm_point_delete(xfr->task_transfer->cp);
5640 xfr->task_transfer->cp = NULL;
5641 xfr_transfer_nextmaster(xfr);
5642 xfr_transfer_nexttarget_or_end(xfr, env);
5646 /* if it is good, link it into the list of data */
5647 /* if the link into list of data fails (malloc fail) cleanup and end */
5648 if(sldns_buffer_limit(c->buffer) > 0) {
5649 verbose(VERB_ALGO, "auth zone http queued up %d bytes",
5650 (int)sldns_buffer_limit(c->buffer));
5651 if(!xfer_link_data(c->buffer, xfr)) {
5652 verbose(VERB_ALGO, "http stopped to %s, malloc failed",
5653 xfr->task_transfer->master->host);
5657 /* if the transfer is done now, disconnect and process the list */
5658 if(err == NETEVENT_DONE) {
5659 if(repinfo) repinfo->c = NULL; /* signal cp deleted to
5660 the routine calling this callback */
5661 comm_point_delete(xfr->task_transfer->cp);
5662 xfr->task_transfer->cp = NULL;
5663 process_list_end_transfer(xfr, env);
5667 /* if we want to read more messages, setup the commpoint to read
5668 * a DNS packet, and the timeout */
5669 lock_basic_unlock(&xfr->lock);
5670 c->tcp_is_reading = 1;
5671 sldns_buffer_clear(c->buffer);
5672 comm_point_start_listening(c, -1, AUTH_TRANSFER_TIMEOUT);
5677 /** start transfer task by this worker , xfr is locked. */
5679 xfr_start_transfer(struct auth_xfer* xfr, struct module_env* env,
5680 struct auth_master* master)
5682 log_assert(xfr->task_transfer != NULL);
5683 log_assert(xfr->task_transfer->worker == NULL);
5684 log_assert(xfr->task_transfer->chunks_first == NULL);
5685 log_assert(xfr->task_transfer->chunks_last == NULL);
5686 xfr->task_transfer->worker = env->worker;
5687 xfr->task_transfer->env = env;
5689 /* init transfer process */
5690 /* find that master in the transfer's list of masters? */
5691 xfr_transfer_start_list(xfr, master);
5692 /* start lookup for hostnames in transfer master list */
5693 xfr_transfer_start_lookups(xfr);
5695 /* initiate TCP, and set timeout on it */
5696 xfr_transfer_nexttarget_or_end(xfr, env);
5699 /** disown task_probe. caller must hold xfr.lock */
5701 xfr_probe_disown(struct auth_xfer* xfr)
5703 /* remove timer (from this worker's event base) */
5704 comm_timer_delete(xfr->task_probe->timer);
5705 xfr->task_probe->timer = NULL;
5706 /* remove the commpoint */
5707 comm_point_delete(xfr->task_probe->cp);
5708 xfr->task_probe->cp = NULL;
5709 /* we don't own this item anymore */
5710 xfr->task_probe->worker = NULL;
5711 xfr->task_probe->env = NULL;
5714 /** send the UDP probe to the master, this is part of task_probe */
5716 xfr_probe_send_probe(struct auth_xfer* xfr, struct module_env* env,
5719 struct sockaddr_storage addr;
5720 socklen_t addrlen = 0;
5723 struct auth_master* master = xfr_probe_current_master(xfr);
5724 if(!master) return 0;
5725 if(master->allow_notify) return 0; /* only for notify */
5726 if(master->http) return 0; /* only masters get SOA UDP probe,
5727 not urls, if those are in this list */
5729 /* get master addr */
5730 if(xfr->task_probe->scan_addr) {
5731 addrlen = xfr->task_probe->scan_addr->addrlen;
5732 memmove(&addr, &xfr->task_probe->scan_addr->addr, addrlen);
5734 if(!extstrtoaddr(master->host, &addr, &addrlen)) {
5735 /* the ones that are not in addr format are supposed
5736 * to be looked up. The lookup has failed however,
5739 dname_str(xfr->name, zname);
5740 log_err("%s: failed lookup, cannot probe to master %s",
5741 zname, master->host);
5747 /* create new ID for new probes, but not on timeout retries,
5748 * this means we'll accept replies to previous retries to same ip */
5749 if(timeout == AUTH_PROBE_TIMEOUT)
5750 xfr->task_probe->id = (uint16_t)(ub_random(env->rnd)&0xffff);
5751 xfr_create_soa_probe_packet(xfr, env->scratch_buffer,
5752 xfr->task_probe->id);
5753 if(!xfr->task_probe->cp) {
5754 xfr->task_probe->cp = outnet_comm_point_for_udp(env->outnet,
5755 auth_xfer_probe_udp_callback, xfr, &addr, addrlen);
5756 if(!xfr->task_probe->cp) {
5758 dname_str(xfr->name, zname);
5759 verbose(VERB_ALGO, "cannot create udp cp for "
5760 "probe %s to %s", zname, master->host);
5764 if(!xfr->task_probe->timer) {
5765 xfr->task_probe->timer = comm_timer_create(env->worker_base,
5766 auth_xfer_probe_timer_callback, xfr);
5767 if(!xfr->task_probe->timer) {
5768 log_err("malloc failure");
5773 /* send udp packet */
5774 if(!comm_point_send_udp_msg(xfr->task_probe->cp, env->scratch_buffer,
5775 (struct sockaddr*)&addr, addrlen)) {
5777 dname_str(xfr->name, zname);
5778 verbose(VERB_ALGO, "failed to send soa probe for %s to %s",
5779 zname, master->host);
5782 xfr->task_probe->timeout = timeout;
5784 t.tv_sec = timeout/1000;
5785 t.tv_usec = (timeout%1000)*1000;
5787 comm_timer_set(xfr->task_probe->timer, &t);
5792 /** callback for task_probe timer */
5794 auth_xfer_probe_timer_callback(void* arg)
5796 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5797 struct module_env* env;
5798 log_assert(xfr->task_probe);
5799 lock_basic_lock(&xfr->lock);
5800 env = xfr->task_probe->env;
5801 if(env->outnet->want_to_quit) {
5802 lock_basic_unlock(&xfr->lock);
5803 return; /* stop on quit */
5806 if(xfr->task_probe->timeout <= AUTH_PROBE_TIMEOUT_STOP) {
5807 /* try again with bigger timeout */
5808 if(xfr_probe_send_probe(xfr, env, xfr->task_probe->timeout*2)) {
5809 lock_basic_unlock(&xfr->lock);
5813 /* delete commpoint so a new one is created, with a fresh port nr */
5814 comm_point_delete(xfr->task_probe->cp);
5815 xfr->task_probe->cp = NULL;
5817 /* too many timeouts (or fail to send), move to next or end */
5818 xfr_probe_nextmaster(xfr);
5819 xfr_probe_send_or_end(xfr, env);
5822 /** callback for task_probe udp packets */
5824 auth_xfer_probe_udp_callback(struct comm_point* c, void* arg, int err,
5825 struct comm_reply* repinfo)
5827 struct auth_xfer* xfr = (struct auth_xfer*)arg;
5828 struct module_env* env;
5829 log_assert(xfr->task_probe);
5830 lock_basic_lock(&xfr->lock);
5831 env = xfr->task_probe->env;
5832 if(env->outnet->want_to_quit) {
5833 lock_basic_unlock(&xfr->lock);
5834 return 0; /* stop on quit */
5837 /* the comm_point_udp_callback is in a for loop for NUM_UDP_PER_SELECT
5838 * and we set rep.c=NULL to stop if from looking inside the commpoint*/
5840 /* stop the timer */
5841 comm_timer_disable(xfr->task_probe->timer);
5843 /* see if we got a packet and what that means */
5844 if(err == NETEVENT_NOERROR) {
5845 uint32_t serial = 0;
5846 if(check_packet_ok(c->buffer, LDNS_RR_TYPE_SOA, xfr,
5848 /* successful lookup */
5849 if(verbosity >= VERB_ALGO) {
5851 dname_str(xfr->name, buf);
5852 verbose(VERB_ALGO, "auth zone %s: soa probe "
5853 "serial is %u", buf, (unsigned)serial);
5855 /* see if this serial indicates that the zone has
5857 if(xfr_serial_means_update(xfr, serial)) {
5858 /* if updated, start the transfer task, if needed */
5859 verbose(VERB_ALGO, "auth_zone updated, start transfer");
5860 if(xfr->task_transfer->worker == NULL) {
5861 struct auth_master* master =
5862 xfr_probe_current_master(xfr);
5863 /* if we have download URLs use them
5864 * in preference to this master we
5865 * just probed the SOA from */
5866 if(xfr->task_transfer->masters &&
5867 xfr->task_transfer->masters->http)
5869 xfr_probe_disown(xfr);
5870 xfr_start_transfer(xfr, env, master);
5875 /* if zone not updated, start the wait timer again */
5876 verbose(VERB_ALGO, "auth_zone unchanged, new lease, wait");
5878 xfr->lease_time = *env->now;
5879 if(xfr->task_nextprobe->worker == NULL)
5880 xfr_set_timeout(xfr, env, 0, 0);
5882 /* other tasks are running, we don't do this anymore */
5883 xfr_probe_disown(xfr);
5884 lock_basic_unlock(&xfr->lock);
5885 /* return, we don't sent a reply to this udp packet,
5886 * and we setup the tasks to do next */
5890 if(verbosity >= VERB_ALGO) {
5892 dname_str(xfr->name, buf);
5893 verbose(VERB_ALGO, "auth zone %s: soa probe failed", buf);
5897 /* delete commpoint so a new one is created, with a fresh port nr */
5898 comm_point_delete(xfr->task_probe->cp);
5899 xfr->task_probe->cp = NULL;
5901 /* if the result was not a successfull probe, we need
5902 * to send the next one */
5903 xfr_probe_nextmaster(xfr);
5904 xfr_probe_send_or_end(xfr, env);
5908 /** lookup a host name for its addresses, if needed */
5910 xfr_probe_lookup_host(struct auth_xfer* xfr, struct module_env* env)
5912 struct sockaddr_storage addr;
5913 socklen_t addrlen = 0;
5914 struct auth_master* master = xfr->task_probe->lookup_target;
5915 struct query_info qinfo;
5916 uint16_t qflags = BIT_RD;
5917 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
5918 struct edns_data edns;
5919 sldns_buffer* buf = env->scratch_buffer;
5920 if(!master) return 0;
5921 if(extstrtoaddr(master->host, &addr, &addrlen)) {
5922 /* not needed, host is in IP addr format */
5925 if(master->allow_notify && !master->http &&
5926 strchr(master->host, '/') != NULL &&
5927 strchr(master->host, '/') == strrchr(master->host, '/')) {
5928 return 0; /* is IP/prefix format, not something to look up */
5931 /* use mesh_new_callback to probe for non-addr hosts,
5932 * and then wait for them to be looked up (in cache, or query) */
5933 qinfo.qname_len = sizeof(dname);
5934 if(sldns_str2wire_dname_buf(master->host, dname, &qinfo.qname_len)
5936 log_err("cannot parse host name of master %s", master->host);
5939 qinfo.qname = dname;
5940 qinfo.qclass = xfr->dclass;
5941 qinfo.qtype = LDNS_RR_TYPE_A;
5942 if(xfr->task_probe->lookup_aaaa)
5943 qinfo.qtype = LDNS_RR_TYPE_AAAA;
5944 qinfo.local_alias = NULL;
5945 if(verbosity >= VERB_ALGO) {
5947 char buf2[LDNS_MAX_DOMAINLEN+1];
5948 dname_str(xfr->name, buf2);
5949 snprintf(buf, sizeof(buf), "auth zone %s: master lookup"
5950 " for task_probe", buf2);
5951 log_query_info(VERB_ALGO, buf, &qinfo);
5953 edns.edns_present = 1;
5955 edns.edns_version = 0;
5956 edns.bits = EDNS_DO;
5957 edns.opt_list = NULL;
5958 if(sldns_buffer_capacity(buf) < 65535)
5959 edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
5960 else edns.udp_size = 65535;
5962 /* unlock xfr during mesh_new_callback() because the callback can be
5963 * called straight away */
5964 lock_basic_unlock(&xfr->lock);
5965 if(!mesh_new_callback(env->mesh, &qinfo, qflags, &edns, buf, 0,
5966 &auth_xfer_probe_lookup_callback, xfr)) {
5967 lock_basic_lock(&xfr->lock);
5968 log_err("out of memory lookup up master %s", master->host);
5971 lock_basic_lock(&xfr->lock);
5975 /** move to sending the probe packets, next if fails. task_probe */
5977 xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
5979 /* are we doing hostname lookups? */
5980 while(xfr->task_probe->lookup_target) {
5981 if(xfr_probe_lookup_host(xfr, env)) {
5982 /* wait for lookup to finish,
5983 * note that the hostname may be in unbound's cache
5984 * and we may then get an instant cache response,
5985 * and that calls the callback just like a full
5986 * lookup and lookup failures also call callback */
5987 lock_basic_unlock(&xfr->lock);
5990 xfr_probe_move_to_next_lookup(xfr, env);
5992 /* probe of list has ended. Create or refresh the list of of
5993 * allow_notify addrs */
5994 probe_copy_masters_for_allow_notify(xfr);
5995 if(xfr->task_probe->only_lookup) {
5996 /* only wanted lookups for copy, stop probe and start wait */
5997 xfr->task_probe->only_lookup = 0;
5998 xfr_probe_disown(xfr);
5999 xfr_set_timeout(xfr, env, 0, 0);
6000 lock_basic_unlock(&xfr->lock);
6004 /* send probe packets */
6005 while(!xfr_probe_end_of_list(xfr)) {
6006 if(xfr_probe_send_probe(xfr, env, AUTH_PROBE_TIMEOUT)) {
6007 /* successfully sent probe, wait for callback */
6008 lock_basic_unlock(&xfr->lock);
6011 /* failed to send probe, next master */
6012 xfr_probe_nextmaster(xfr);
6015 /* we failed to send this as well, move to the wait task,
6016 * use the shorter retry timeout */
6017 xfr_probe_disown(xfr);
6019 /* pick up the nextprobe task and wait */
6020 xfr_set_timeout(xfr, env, 1, 0);
6021 lock_basic_unlock(&xfr->lock);
6024 /** callback for task_probe lookup of host name, of A or AAAA */
6025 void auth_xfer_probe_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
6026 enum sec_status ATTR_UNUSED(sec), char* ATTR_UNUSED(why_bogus))
6028 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6029 struct module_env* env;
6030 log_assert(xfr->task_probe);
6031 lock_basic_lock(&xfr->lock);
6032 env = xfr->task_probe->env;
6033 if(env->outnet->want_to_quit) {
6034 lock_basic_unlock(&xfr->lock);
6035 return; /* stop on quit */
6038 /* process result */
6039 if(rcode == LDNS_RCODE_NOERROR) {
6040 uint16_t wanted_qtype = LDNS_RR_TYPE_A;
6041 struct regional* temp = env->scratch;
6042 struct query_info rq;
6043 struct reply_info* rep;
6044 if(xfr->task_probe->lookup_aaaa)
6045 wanted_qtype = LDNS_RR_TYPE_AAAA;
6046 memset(&rq, 0, sizeof(rq));
6047 rep = parse_reply_in_temp_region(buf, temp, &rq);
6048 if(rep && rq.qtype == wanted_qtype &&
6049 FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_NOERROR) {
6050 /* parsed successfully */
6051 struct ub_packed_rrset_key* answer =
6052 reply_find_answer_rrset(&rq, rep);
6054 xfr_master_add_addrs(xfr->task_probe->
6055 lookup_target, answer, wanted_qtype);
6059 if(xfr->task_probe->lookup_target->list &&
6060 xfr->task_probe->lookup_target == xfr_probe_current_master(xfr))
6061 xfr->task_probe->scan_addr = xfr->task_probe->lookup_target->list;
6063 /* move to lookup AAAA after A lookup, move to next hostname lookup,
6064 * or move to send the probes, or, if nothing to do, end task_probe */
6065 xfr_probe_move_to_next_lookup(xfr, env);
6066 xfr_probe_send_or_end(xfr, env);
6069 /** disown task_nextprobe. caller must hold xfr.lock */
6071 xfr_nextprobe_disown(struct auth_xfer* xfr)
6073 /* delete the timer, because the next worker to pick this up may
6074 * not have the same event base */
6075 comm_timer_delete(xfr->task_nextprobe->timer);
6076 xfr->task_nextprobe->timer = NULL;
6077 xfr->task_nextprobe->next_probe = 0;
6078 /* we don't own this item anymore */
6079 xfr->task_nextprobe->worker = NULL;
6080 xfr->task_nextprobe->env = NULL;
6083 /** xfer nextprobe timeout callback, this is part of task_nextprobe */
6085 auth_xfer_timer(void* arg)
6087 struct auth_xfer* xfr = (struct auth_xfer*)arg;
6088 struct module_env* env;
6089 log_assert(xfr->task_nextprobe);
6090 lock_basic_lock(&xfr->lock);
6091 env = xfr->task_nextprobe->env;
6092 if(env->outnet->want_to_quit) {
6093 lock_basic_unlock(&xfr->lock);
6094 return; /* stop on quit */
6097 /* see if zone has expired, and if so, also set auth_zone expired */
6098 if(xfr->have_zone && !xfr->zone_expired &&
6099 *env->now >= xfr->lease_time + xfr->expiry) {
6100 lock_basic_unlock(&xfr->lock);
6101 auth_xfer_set_expired(xfr, env, 1);
6102 lock_basic_lock(&xfr->lock);
6105 xfr_nextprobe_disown(xfr);
6107 if(!xfr_start_probe(xfr, env, NULL)) {
6108 /* not started because already in progress */
6109 lock_basic_unlock(&xfr->lock);
6113 /** return true if there are probe (SOA UDP query) targets in the master list*/
6115 have_probe_targets(struct auth_master* list)
6117 struct auth_master* p;
6118 for(p=list; p; p = p->next) {
6119 if(!p->allow_notify && p->host)
6125 /** start task_probe if possible, if no masters for probe start task_transfer
6126 * returns true if task has been started, and false if the task is already
6129 xfr_start_probe(struct auth_xfer* xfr, struct module_env* env,
6130 struct auth_master* spec)
6132 /* see if we need to start a probe (or maybe it is already in
6133 * progress (due to notify)) */
6134 if(xfr->task_probe->worker == NULL) {
6135 if(!have_probe_targets(xfr->task_probe->masters) &&
6136 !(xfr->task_probe->only_lookup &&
6137 xfr->task_probe->masters != NULL)) {
6138 /* useless to pick up task_probe, no masters to
6139 * probe. Instead attempt to pick up task transfer */
6140 if(xfr->task_transfer->worker == NULL) {
6141 xfr_start_transfer(xfr, env, spec);
6144 /* task transfer already in progress */
6148 /* pick up the probe task ourselves */
6149 xfr->task_probe->worker = env->worker;
6150 xfr->task_probe->env = env;
6151 xfr->task_probe->cp = NULL;
6153 /* start the task */
6154 /* if this was a timeout, no specific first master to scan */
6155 /* otherwise, spec is nonNULL the notified master, scan
6156 * first and also transfer first from it */
6157 xfr_probe_start_list(xfr, spec);
6158 /* setup to start the lookup of hostnames of masters afresh */
6159 xfr_probe_start_lookups(xfr);
6160 /* send the probe packet or next send, or end task */
6161 xfr_probe_send_or_end(xfr, env);
6167 /** for task_nextprobe.
6168 * determine next timeout for auth_xfer. Also (re)sets timer.
6169 * @param xfr: task structure
6170 * @param env: module environment, with worker and time.
6171 * @param failure: set true if timer should be set for failure retry.
6172 * @param lookup_only: only perform lookups when timer done, 0 sec timeout
6175 xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
6176 int failure, int lookup_only)
6179 log_assert(xfr->task_nextprobe != NULL);
6180 log_assert(xfr->task_nextprobe->worker == NULL ||
6181 xfr->task_nextprobe->worker == env->worker);
6182 /* normally, nextprobe = startoflease + refresh,
6183 * but if expiry is sooner, use that one.
6184 * after a failure, use the retry timer instead. */
6185 xfr->task_nextprobe->next_probe = *env->now;
6186 if(xfr->lease_time && !failure)
6187 xfr->task_nextprobe->next_probe = xfr->lease_time;
6190 xfr->task_nextprobe->backoff = 0;
6192 if(xfr->task_nextprobe->backoff == 0)
6193 xfr->task_nextprobe->backoff = 3;
6194 else xfr->task_nextprobe->backoff *= 2;
6195 if(xfr->task_nextprobe->backoff > AUTH_TRANSFER_MAX_BACKOFF)
6196 xfr->task_nextprobe->backoff =
6197 AUTH_TRANSFER_MAX_BACKOFF;
6200 if(xfr->have_zone) {
6201 time_t wait = xfr->refresh;
6202 if(failure) wait = xfr->retry;
6203 if(xfr->expiry < wait)
6204 xfr->task_nextprobe->next_probe += xfr->expiry;
6205 else xfr->task_nextprobe->next_probe += wait;
6207 xfr->task_nextprobe->next_probe +=
6208 xfr->task_nextprobe->backoff;
6209 /* put the timer exactly on expiry, if possible */
6210 if(xfr->lease_time && xfr->lease_time+xfr->expiry <
6211 xfr->task_nextprobe->next_probe &&
6212 xfr->lease_time+xfr->expiry > *env->now)
6213 xfr->task_nextprobe->next_probe =
6214 xfr->lease_time+xfr->expiry;
6216 xfr->task_nextprobe->next_probe +=
6217 xfr->task_nextprobe->backoff;
6220 if(!xfr->task_nextprobe->timer) {
6221 xfr->task_nextprobe->timer = comm_timer_create(
6222 env->worker_base, auth_xfer_timer, xfr);
6223 if(!xfr->task_nextprobe->timer) {
6224 /* failed to malloc memory. likely zone transfer
6225 * also fails for that. skip the timeout */
6227 dname_str(xfr->name, zname);
6228 log_err("cannot allocate timer, no refresh for %s",
6233 xfr->task_nextprobe->worker = env->worker;
6234 xfr->task_nextprobe->env = env;
6235 if(*(xfr->task_nextprobe->env->now) <= xfr->task_nextprobe->next_probe)
6236 tv.tv_sec = xfr->task_nextprobe->next_probe -
6237 *(xfr->task_nextprobe->env->now);
6239 if(tv.tv_sec != 0 && lookup_only && xfr->task_probe->masters) {
6240 /* don't lookup_only, if lookup timeout is 0 anyway,
6241 * or if we don't have masters to lookup */
6243 if(xfr->task_probe && xfr->task_probe->worker == NULL)
6244 xfr->task_probe->only_lookup = 1;
6246 if(verbosity >= VERB_ALGO) {
6248 dname_str(xfr->name, zname);
6249 verbose(VERB_ALGO, "auth zone %s timeout in %d seconds",
6250 zname, (int)tv.tv_sec);
6253 comm_timer_set(xfr->task_nextprobe->timer, &tv);
6256 /** initial pick up of worker timeouts, ties events to worker event loop */
6258 auth_xfer_pickup_initial(struct auth_zones* az, struct module_env* env)
6260 struct auth_xfer* x;
6261 lock_rw_wrlock(&az->lock);
6262 RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
6263 lock_basic_lock(&x->lock);
6264 /* set lease_time, because we now have timestamp in env,
6265 * (not earlier during startup and apply_cfg), and this
6266 * notes the start time when the data was acquired */
6268 x->lease_time = *env->now;
6269 if(x->task_nextprobe && x->task_nextprobe->worker == NULL) {
6270 xfr_set_timeout(x, env, 0, 1);
6272 lock_basic_unlock(&x->lock);
6274 lock_rw_unlock(&az->lock);
6277 void auth_zones_cleanup(struct auth_zones* az)
6279 struct auth_xfer* x;
6280 lock_rw_wrlock(&az->lock);
6281 RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
6282 lock_basic_lock(&x->lock);
6283 if(x->task_nextprobe && x->task_nextprobe->worker != NULL) {
6284 xfr_nextprobe_disown(x);
6286 if(x->task_probe && x->task_probe->worker != NULL) {
6287 xfr_probe_disown(x);
6289 if(x->task_transfer && x->task_transfer->worker != NULL) {
6290 auth_chunks_delete(x->task_transfer);
6291 xfr_transfer_disown(x);
6293 lock_basic_unlock(&x->lock);
6295 lock_rw_unlock(&az->lock);
6299 * malloc the xfer and tasks
6300 * @param z: auth_zone with name of zone.
6302 static struct auth_xfer*
6303 auth_xfer_new(struct auth_zone* z)
6305 struct auth_xfer* xfr;
6306 xfr = (struct auth_xfer*)calloc(1, sizeof(*xfr));
6307 if(!xfr) return NULL;
6308 xfr->name = memdup(z->name, z->namelen);
6313 xfr->node.key = xfr;
6314 xfr->namelen = z->namelen;
6315 xfr->namelabs = z->namelabs;
6316 xfr->dclass = z->dclass;
6318 xfr->task_nextprobe = (struct auth_nextprobe*)calloc(1,
6319 sizeof(struct auth_nextprobe));
6320 if(!xfr->task_nextprobe) {
6325 xfr->task_probe = (struct auth_probe*)calloc(1,
6326 sizeof(struct auth_probe));
6327 if(!xfr->task_probe) {
6328 free(xfr->task_nextprobe);
6333 xfr->task_transfer = (struct auth_transfer*)calloc(1,
6334 sizeof(struct auth_transfer));
6335 if(!xfr->task_transfer) {
6336 free(xfr->task_probe);
6337 free(xfr->task_nextprobe);
6343 lock_basic_init(&xfr->lock);
6344 lock_protect(&xfr->lock, &xfr->name, sizeof(xfr->name));
6345 lock_protect(&xfr->lock, &xfr->namelen, sizeof(xfr->namelen));
6346 lock_protect(&xfr->lock, xfr->name, xfr->namelen);
6347 lock_protect(&xfr->lock, &xfr->namelabs, sizeof(xfr->namelabs));
6348 lock_protect(&xfr->lock, &xfr->dclass, sizeof(xfr->dclass));
6349 lock_protect(&xfr->lock, &xfr->notify_received, sizeof(xfr->notify_received));
6350 lock_protect(&xfr->lock, &xfr->notify_serial, sizeof(xfr->notify_serial));
6351 lock_protect(&xfr->lock, &xfr->zone_expired, sizeof(xfr->zone_expired));
6352 lock_protect(&xfr->lock, &xfr->have_zone, sizeof(xfr->have_zone));
6353 lock_protect(&xfr->lock, &xfr->serial, sizeof(xfr->serial));
6354 lock_protect(&xfr->lock, &xfr->retry, sizeof(xfr->retry));
6355 lock_protect(&xfr->lock, &xfr->refresh, sizeof(xfr->refresh));
6356 lock_protect(&xfr->lock, &xfr->expiry, sizeof(xfr->expiry));
6357 lock_protect(&xfr->lock, &xfr->lease_time, sizeof(xfr->lease_time));
6358 lock_protect(&xfr->lock, &xfr->task_nextprobe->worker,
6359 sizeof(xfr->task_nextprobe->worker));
6360 lock_protect(&xfr->lock, &xfr->task_probe->worker,
6361 sizeof(xfr->task_probe->worker));
6362 lock_protect(&xfr->lock, &xfr->task_transfer->worker,
6363 sizeof(xfr->task_transfer->worker));
6364 lock_basic_lock(&xfr->lock);
6368 /** Create auth_xfer structure.
6369 * This populates the have_zone, soa values, and so on times.
6370 * and sets the timeout, if a zone transfer is needed a short timeout is set.
6371 * For that the auth_zone itself must exist (and read in zonefile)
6372 * returns false on alloc failure. */
6374 auth_xfer_create(struct auth_zones* az, struct auth_zone* z)
6376 struct auth_xfer* xfr;
6379 xfr = auth_xfer_new(z);
6381 log_err("malloc failure");
6384 /* insert in tree */
6385 (void)rbtree_insert(&az->xtree, &xfr->node);
6389 /** create new auth_master structure */
6390 static struct auth_master*
6391 auth_master_new(struct auth_master*** list)
6393 struct auth_master *m;
6394 m = (struct auth_master*)calloc(1, sizeof(*m));
6396 log_err("malloc failure");
6399 /* set first pointer to m, or next pointer of previous element to m */
6401 /* store m's next pointer as future point to store at */
6402 (*list) = &(m->next);
6406 /** dup_prefix : create string from initial part of other string, malloced */
6408 dup_prefix(char* str, size_t num)
6411 size_t len = strlen(str);
6412 if(len < num) num = len; /* not more than strlen */
6413 result = (char*)malloc(num+1);
6415 log_err("malloc failure");
6418 memmove(result, str, num);
6423 /** dup string and print error on error */
6427 char* result = strdup(str);
6429 log_err("malloc failure");
6435 /** find first of two characters */
6437 str_find_first_of_chars(char* s, char a, char b)
6439 char* ra = strchr(s, a);
6440 char* rb = strchr(s, b);
6443 if(ra < rb) return ra;
6447 /** parse URL into host and file parts, false on malloc or parse error */
6449 parse_url(char* url, char** host, char** file, int* port, int* ssl)
6452 /* parse http://www.example.com/file.htm
6453 * or http://127.0.0.1 (index.html)
6454 * or https://[::1@1234]/a/b/c/d */
6456 *port = AUTH_HTTPS_PORT;
6458 /* parse http:// or https:// */
6459 if(strncmp(p, "http://", 7) == 0) {
6462 *port = AUTH_HTTP_PORT;
6463 } else if(strncmp(p, "https://", 8) == 0) {
6465 } else if(strstr(p, "://") && strchr(p, '/') > strstr(p, "://") &&
6466 strchr(p, ':') >= strstr(p, "://")) {
6467 char* uri = dup_prefix(p, (size_t)(strstr(p, "://")-p));
6468 log_err("protocol %s:// not supported (for url %s)",
6474 /* parse hostname part */
6476 char* end = strchr(p, ']');
6477 p++; /* skip over [ */
6479 *host = dup_prefix(p, (size_t)(end-p));
6480 if(!*host) return 0;
6481 p = end+1; /* skip over ] */
6484 if(!*host) return 0;
6488 char* end = str_find_first_of_chars(p, ':', '/');
6490 *host = dup_prefix(p, (size_t)(end-p));
6491 if(!*host) return 0;
6494 if(!*host) return 0;
6496 p = end; /* at next : or / or NULL */
6499 /* parse port number */
6500 if(p && p[0] == ':') {
6502 *port = strtol(p+1, &end, 10);
6506 /* parse filename part */
6507 while(p && *p == '/')
6510 *file = strdup("index.html");
6511 else *file = strdup(p);
6513 log_err("malloc failure");
6520 xfer_set_masters(struct auth_master** list, struct config_auth* c,
6523 struct auth_master* m;
6524 struct config_strlist* p;
6525 /* list points to the first, or next pointer for the new element */
6527 list = &( (*list)->next );
6530 for(p = c->urls; p; p = p->next) {
6531 m = auth_master_new(&list);
6533 if(!parse_url(p->str, &m->host, &m->file, &m->port, &m->ssl))
6536 for(p = c->masters; p; p = p->next) {
6537 m = auth_master_new(&list);
6538 m->ixfr = 1; /* this flag is not configurable */
6539 m->host = strdup(p->str);
6541 log_err("malloc failure");
6545 for(p = c->allow_notify; p; p = p->next) {
6546 m = auth_master_new(&list);
6547 m->allow_notify = 1;
6548 m->host = strdup(p->str);
6550 log_err("malloc failure");
6557 #define SERIAL_BITS 32
6559 compare_serial(uint32_t a, uint32_t b)
6561 const uint32_t cutoff = ((uint32_t) 1 << (SERIAL_BITS - 1));
6565 } else if ((a < b && b - a < cutoff) || (a > b && a - b > cutoff)) {