3 * Functions for ldns_zone structure
4 * a Net::DNS like library for C
6 * (c) NLnet Labs, 2005-2006
7 * See the file LICENSE for the license
9 #include <ldns/config.h>
11 #include <ldns/ldns.h>
17 ldns_zone_soa(const ldns_zone *z)
23 ldns_zone_rr_count(const ldns_zone *z)
25 return ldns_rr_list_rr_count(z->_rrs);
29 ldns_zone_set_soa(ldns_zone *z, ldns_rr *soa)
35 ldns_zone_rrs(const ldns_zone *z)
41 ldns_zone_set_rrs(ldns_zone *z, ldns_rr_list *rrlist)
47 ldns_zone_push_rr_list(ldns_zone *z, ldns_rr_list *list)
49 return ldns_rr_list_cat(ldns_zone_rrs(z), list);
54 ldns_zone_push_rr(ldns_zone *z, ldns_rr *rr)
56 return ldns_rr_list_push_rr( ldns_zone_rrs(z), rr);
59 /* return a clone of the given rr list, without the glue records
60 * rr list should be the complete zone
61 * if present, stripped records are added to the list *glue_records
64 ldns_zone_strip_glue_rrs(const ldns_rdf *zone_name, const ldns_rr_list *rrs, ldns_rr_list *glue_rrs)
66 ldns_rr_list *new_list;
68 /* when do we find glue? It means we find an IP address
69 * (AAAA/A) for a nameserver listed in the zone
72 * first find all the zonecuts (NS records)
73 * find all the AAAA or A records (can be done it the
76 * Check if the aaaa/a list are subdomains under the
78 * If yes -> glue, if no -> not glue
81 ldns_rr_list *zone_cuts;
84 ldns_rdf *dname_a, *ns_owner;
91 new_list = ldns_rr_list_new();
92 if (!new_list) goto memory_error;
93 zone_cuts = ldns_rr_list_new();
94 if (!zone_cuts) goto memory_error;
95 addr = ldns_rr_list_new();
96 if (!addr) goto memory_error;
98 for(i = 0; i < ldns_rr_list_rr_count(rrs); i++) {
99 r = ldns_rr_list_rr(rrs, i);
100 if (ldns_rr_get_type(r) == LDNS_RR_TYPE_A ||
101 ldns_rr_get_type(r) == LDNS_RR_TYPE_AAAA) {
103 if (!ldns_rr_list_push_rr(addr, r)) goto memory_error;
106 if (ldns_rr_get_type(r) == LDNS_RR_TYPE_NS) {
107 /* multiple zones will end up here -
108 * for now; not a problem
110 /* don't add NS records for the current zone itself */
111 if (ldns_rdf_compare(ldns_rr_owner(r),
113 if (!ldns_rr_list_push_rr(zone_cuts, r)) goto memory_error;
119 /* will sorting make it quicker ?? */
120 for(i = 0; i < ldns_rr_list_rr_count(zone_cuts); i++) {
121 ns = ldns_rr_list_rr(zone_cuts, i);
122 ns_owner = ldns_rr_owner(ns);
123 for(j = 0; j < ldns_rr_list_rr_count(addr); j++) {
124 a = ldns_rr_list_rr(addr, j);
125 dname_a = ldns_rr_owner(a);
127 if (ldns_dname_is_subdomain(dname_a, ns_owner)) {
130 if (!ldns_rr_list_push_rr(glue_rrs, a)) goto memory_error;
134 if (!ldns_rr_list_push_rr(new_list, a)) goto memory_error;
139 ldns_rr_list_free(addr);
140 ldns_rr_list_free(zone_cuts);
146 ldns_rr_list_free(new_list);
149 ldns_rr_list_free(zone_cuts);
152 ldns_rr_list_free(addr);
158 * Get the list of glue records in a zone
159 * XXX: there should be a way for this to return error, other than NULL,
160 * since NULL is a valid return
163 ldns_zone_glue_rr_list(const ldns_zone *z)
165 /* when do we find glue? It means we find an IP address
166 * (AAAA/A) for a nameserver listed in the zone
169 * first find all the zonecuts (NS records)
170 * find all the AAAA or A records (can be done it the
173 * Check if the aaaa/a list are subdomains under the
175 * If yes -> glue, if no -> not glue
178 ldns_rr_list *zone_cuts;
182 ldns_rdf *dname_a, *ns_owner;
189 /* we cannot determine glue in a 'zone' without a SOA */
190 if (!ldns_zone_soa(z)) {
194 zone_cuts = ldns_rr_list_new();
195 if (!zone_cuts) goto memory_error;
196 addr = ldns_rr_list_new();
197 if (!addr) goto memory_error;
198 glue = ldns_rr_list_new();
199 if (!glue) goto memory_error;
201 for(i = 0; i < ldns_zone_rr_count(z); i++) {
202 r = ldns_rr_list_rr(ldns_zone_rrs(z), i);
203 if (ldns_rr_get_type(r) == LDNS_RR_TYPE_A ||
204 ldns_rr_get_type(r) == LDNS_RR_TYPE_AAAA) {
206 if (!ldns_rr_list_push_rr(addr, r)) goto memory_error;
209 if (ldns_rr_get_type(r) == LDNS_RR_TYPE_NS) {
210 /* multiple zones will end up here -
211 * for now; not a problem
213 /* don't add NS records for the current zone itself */
214 if (ldns_rdf_compare(ldns_rr_owner(r),
215 ldns_rr_owner(ldns_zone_soa(z))) != 0) {
216 if (!ldns_rr_list_push_rr(zone_cuts, r)) goto memory_error;
222 /* will sorting make it quicker ?? */
223 for(i = 0; i < ldns_rr_list_rr_count(zone_cuts); i++) {
224 ns = ldns_rr_list_rr(zone_cuts, i);
225 ns_owner = ldns_rr_owner(ns);
227 for(j = 0; j < ldns_rr_list_rr_count(addr); j++) {
228 a = ldns_rr_list_rr(addr, j);
229 dname_a = ldns_rr_owner(a);
231 if (ldns_dname_is_subdomain(dname_a, ns_owner) ||
232 ldns_dname_compare(dname_a, ns_owner) == 0) {
234 if (!ldns_rr_list_push_rr(glue, a)) goto memory_error;
239 ldns_rr_list_free(addr);
240 ldns_rr_list_free(zone_cuts);
242 if (ldns_rr_list_rr_count(glue) == 0) {
243 ldns_rr_list_free(glue);
251 LDNS_FREE(zone_cuts);
254 ldns_rr_list_free(addr);
257 ldns_rr_list_free(glue);
267 z = LDNS_MALLOC(ldns_zone);
272 z->_rrs = ldns_rr_list_new();
277 ldns_zone_set_soa(z, NULL);
285 ldns_zone_new_frm_fp(ldns_zone **z, FILE *fp, ldns_rdf *origin, uint32_t ttl, ldns_rr_class c)
287 return ldns_zone_new_frm_fp_l(z, fp, origin, ttl, c, NULL);
290 /* XXX: class is never used */
292 ldns_zone_new_frm_fp_l(ldns_zone **z, FILE *fp, ldns_rdf *origin, uint32_t ttl,
293 ldns_rr_class ATTR_UNUSED(c), int *line_nr)
300 bool soa_seen = false; /* 2 soa are an error */
304 /* most cases of error are memory problems */
305 ret = LDNS_STATUS_MEM_ERR;
314 my_origin = ldns_rdf_clone(origin);
315 if (!my_origin) goto error;
316 /* also set the prev */
317 my_prev = ldns_rdf_clone(origin);
318 if (!my_prev) goto error;
321 newzone = ldns_zone_new();
322 if (!newzone) goto error;
325 s = ldns_rr_new_frm_fp_l(&rr, fp, &my_ttl, &my_origin, &my_prev, line_nr);
328 if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_SOA) {
331 * just skip, maybe we want to say
337 ldns_zone_set_soa(newzone, rr);
338 /* set origin to soa if not specified */
340 my_origin = ldns_rdf_clone(ldns_rr_owner(rr));
345 /* a normal RR - as sofar the DNS is normal */
346 if (!ldns_zone_push_rr(newzone, rr)) goto error;
348 case LDNS_STATUS_SYNTAX_EMPTY:
349 /* empty line was seen */
350 case LDNS_STATUS_SYNTAX_TTL:
351 /* the function set the ttl */
353 case LDNS_STATUS_SYNTAX_ORIGIN:
354 /* the function set the origin */
356 case LDNS_STATUS_SYNTAX_INCLUDE:
357 ret = LDNS_STATUS_SYNTAX_INCLUDE_ERR_NOTIMPL;
366 ldns_rdf_deep_free(my_origin);
369 ldns_rdf_deep_free(my_prev);
374 ldns_zone_free(newzone);
377 return LDNS_STATUS_OK;
381 ldns_rdf_deep_free(my_origin);
384 ldns_rdf_deep_free(my_prev);
387 ldns_zone_free(newzone);
393 ldns_zone_sort(ldns_zone *zone)
396 assert(zone != NULL);
398 zrr = ldns_zone_rrs(zone);
399 ldns_rr_list_sort(zrr);
404 * ixfr function. Work on a ldns_zone and remove and add
405 * the rrs from the rrlist
406 * \param[in] z the zone to work on
407 * \param[in] del rr_list to remove from the zone
408 * \param[in] add rr_list to add to the zone
409 * \return Tja, wat zouden we eens returnen TODO
412 ldns_zone_ixfr_del_add(ldns_zone *z, ldns_rr_list *del, ldns_rr_list *add)
419 ldns_zone_free(ldns_zone *zone)
421 ldns_rr_list_free(zone->_rrs);
426 ldns_zone_deep_free(ldns_zone *zone)
428 ldns_rr_free(zone->_soa);
429 ldns_rr_list_deep_free(zone->_rrs);