4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <arpa/inet.h>
33 #include <avahi-common/domain.h>
34 #include <avahi-common/malloc.h>
40 #include "domain-util.h"
43 AvahiKey *avahi_key_new(const char *name, uint16_t class, uint16_t type) {
47 if (!(k = avahi_new(AvahiKey, 1))) {
48 avahi_log_error("avahi_new() failed.");
52 if (!(k->name = avahi_normalize_name_strdup(name))) {
53 avahi_log_error("avahi_normalize_name() failed.");
65 AvahiKey *avahi_key_new_cname(AvahiKey *key) {
68 if (key->clazz != AVAHI_DNS_CLASS_IN)
71 if (key->type == AVAHI_DNS_TYPE_CNAME)
74 return avahi_key_new(key->name, key->clazz, AVAHI_DNS_TYPE_CNAME);
77 AvahiKey *avahi_key_ref(AvahiKey *k) {
86 void avahi_key_unref(AvahiKey *k) {
90 if ((--k->ref) <= 0) {
96 AvahiRecord *avahi_record_new(AvahiKey *k, uint32_t ttl) {
101 if (!(r = avahi_new(AvahiRecord, 1))) {
102 avahi_log_error("avahi_new() failed.");
107 r->key = avahi_key_ref(k);
109 memset(&r->data, 0, sizeof(r->data));
111 r->ttl = ttl != (uint32_t) -1 ? ttl : AVAHI_DEFAULT_TTL;
116 AvahiRecord *avahi_record_new_full(const char *name, uint16_t class, uint16_t type, uint32_t ttl) {
122 if (!(k = avahi_key_new(name, class, type))) {
123 avahi_log_error("avahi_key_new() failed.");
127 r = avahi_record_new(k, ttl);
131 avahi_log_error("avahi_record_new() failed.");
138 AvahiRecord *avahi_record_ref(AvahiRecord *r) {
146 void avahi_record_unref(AvahiRecord *r) {
150 if ((--r->ref) <= 0) {
151 switch (r->key->type) {
153 case AVAHI_DNS_TYPE_SRV:
154 avahi_free(r->data.srv.name);
157 case AVAHI_DNS_TYPE_PTR:
158 case AVAHI_DNS_TYPE_CNAME:
159 case AVAHI_DNS_TYPE_NS:
160 avahi_free(r->data.ptr.name);
163 case AVAHI_DNS_TYPE_HINFO:
164 avahi_free(r->data.hinfo.cpu);
165 avahi_free(r->data.hinfo.os);
168 case AVAHI_DNS_TYPE_TXT:
169 avahi_string_list_free(r->data.txt.string_list);
172 case AVAHI_DNS_TYPE_A:
173 case AVAHI_DNS_TYPE_AAAA:
177 avahi_free(r->data.generic.data);
180 avahi_key_unref(r->key);
185 const char *avahi_dns_class_to_string(uint16_t class) {
186 if (class & AVAHI_DNS_CACHE_FLUSH)
190 case AVAHI_DNS_CLASS_IN:
192 case AVAHI_DNS_CLASS_ANY:
199 const char *avahi_dns_type_to_string(uint16_t type) {
201 case AVAHI_DNS_TYPE_CNAME:
203 case AVAHI_DNS_TYPE_A:
205 case AVAHI_DNS_TYPE_AAAA:
207 case AVAHI_DNS_TYPE_PTR:
209 case AVAHI_DNS_TYPE_HINFO:
211 case AVAHI_DNS_TYPE_TXT:
213 case AVAHI_DNS_TYPE_SRV:
215 case AVAHI_DNS_TYPE_ANY:
217 case AVAHI_DNS_TYPE_SOA:
219 case AVAHI_DNS_TYPE_NS:
226 char *avahi_key_to_string(const AvahiKey *k) {
230 return avahi_strdup_printf("%s\t%s\t%s",
232 avahi_dns_class_to_string(k->clazz),
233 avahi_dns_type_to_string(k->type));
236 char *avahi_record_to_string(const AvahiRecord *r) {
238 char buf[257], *t = NULL, *d = NULL;
243 switch (r->key->type) {
244 case AVAHI_DNS_TYPE_A:
245 inet_ntop(AF_INET, &r->data.a.address.address, t = buf, sizeof(buf));
248 case AVAHI_DNS_TYPE_AAAA:
249 inet_ntop(AF_INET6, &r->data.aaaa.address.address, t = buf, sizeof(buf));
252 case AVAHI_DNS_TYPE_PTR:
253 case AVAHI_DNS_TYPE_CNAME:
254 case AVAHI_DNS_TYPE_NS:
256 t = r->data.ptr.name;
259 case AVAHI_DNS_TYPE_TXT:
260 t = d = avahi_string_list_to_string(r->data.txt.string_list);
263 case AVAHI_DNS_TYPE_HINFO:
265 snprintf(t = buf, sizeof(buf), "\"%s\" \"%s\"", r->data.hinfo.cpu, r->data.hinfo.os);
268 case AVAHI_DNS_TYPE_SRV:
270 snprintf(t = buf, sizeof(buf), "%u %u %u %s",
271 r->data.srv.priority,
279 p = avahi_key_to_string(r->key);
280 s = avahi_strdup_printf("%s %s ; ttl=%u", p, t ? t : "<unparsable>", r->ttl);
287 int avahi_key_equal(const AvahiKey *a, const AvahiKey *b) {
294 /* g_message("equal: %p %p", a, b); */
296 return avahi_domain_equal(a->name, b->name) &&
297 a->type == b->type &&
298 a->clazz == b->clazz;
301 int avahi_key_pattern_match(const AvahiKey *pattern, const AvahiKey *k) {
305 /* g_message("equal: %p %p", a, b); */
307 assert(!avahi_key_is_pattern(k));
312 return avahi_domain_equal(pattern->name, k->name) &&
313 (pattern->type == k->type || pattern->type == AVAHI_DNS_TYPE_ANY) &&
314 (pattern->clazz == k->clazz || pattern->clazz == AVAHI_DNS_CLASS_ANY);
317 int avahi_key_is_pattern(const AvahiKey *k) {
321 k->type == AVAHI_DNS_TYPE_ANY ||
322 k->clazz == AVAHI_DNS_CLASS_ANY;
325 unsigned avahi_key_hash(const AvahiKey *k) {
329 avahi_domain_hash(k->name) +
334 static int rdata_equal(const AvahiRecord *a, const AvahiRecord *b) {
337 assert(a->key->type == b->key->type);
339 /* t = avahi_record_to_string(a); */
340 /* g_message("comparing %s", t); */
343 /* t = avahi_record_to_string(b); */
344 /* g_message("and %s", t); */
348 switch (a->key->type) {
349 case AVAHI_DNS_TYPE_SRV:
351 a->data.srv.priority == b->data.srv.priority &&
352 a->data.srv.weight == b->data.srv.weight &&
353 a->data.srv.port == b->data.srv.port &&
354 avahi_domain_equal(a->data.srv.name, b->data.srv.name);
356 case AVAHI_DNS_TYPE_PTR:
357 case AVAHI_DNS_TYPE_CNAME:
358 case AVAHI_DNS_TYPE_NS:
359 return avahi_domain_equal(a->data.ptr.name, b->data.ptr.name);
361 case AVAHI_DNS_TYPE_HINFO:
363 !strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu) &&
364 !strcmp(a->data.hinfo.os, b->data.hinfo.os);
366 case AVAHI_DNS_TYPE_TXT:
367 return avahi_string_list_equal(a->data.txt.string_list, b->data.txt.string_list);
369 case AVAHI_DNS_TYPE_A:
370 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address)) == 0;
372 case AVAHI_DNS_TYPE_AAAA:
373 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address)) == 0;
376 return a->data.generic.size == b->data.generic.size &&
377 (a->data.generic.size == 0 || memcmp(a->data.generic.data, b->data.generic.data, a->data.generic.size) == 0);
382 int avahi_record_equal_no_ttl(const AvahiRecord *a, const AvahiRecord *b) {
390 avahi_key_equal(a->key, b->key) &&
395 AvahiRecord *avahi_record_copy(AvahiRecord *r) {
398 if (!(copy = avahi_new(AvahiRecord, 1))) {
399 avahi_log_error("avahi_new() failed.");
404 copy->key = avahi_key_ref(r->key);
407 switch (r->key->type) {
408 case AVAHI_DNS_TYPE_PTR:
409 case AVAHI_DNS_TYPE_CNAME:
410 case AVAHI_DNS_TYPE_NS:
411 if (!(copy->data.ptr.name = avahi_strdup(r->data.ptr.name)))
415 case AVAHI_DNS_TYPE_SRV:
416 copy->data.srv.priority = r->data.srv.priority;
417 copy->data.srv.weight = r->data.srv.weight;
418 copy->data.srv.port = r->data.srv.port;
419 if (!(copy->data.srv.name = avahi_strdup(r->data.srv.name)))
423 case AVAHI_DNS_TYPE_HINFO:
424 if (!(copy->data.hinfo.os = avahi_strdup(r->data.hinfo.os)))
427 if (!(copy->data.hinfo.cpu = avahi_strdup(r->data.hinfo.cpu))) {
428 avahi_free(r->data.hinfo.os);
433 case AVAHI_DNS_TYPE_TXT:
434 copy->data.txt.string_list = avahi_string_list_copy(r->data.txt.string_list);
437 case AVAHI_DNS_TYPE_A:
438 copy->data.a.address = r->data.a.address;
441 case AVAHI_DNS_TYPE_AAAA:
442 copy->data.aaaa.address = r->data.aaaa.address;
446 if (!(copy->data.generic.data = avahi_memdup(r->data.generic.data, r->data.generic.size)))
448 copy->data.generic.size = r->data.generic.size;
456 avahi_log_error("Failed to allocate memory");
458 avahi_key_unref(copy->key);
465 size_t avahi_key_get_estimate_size(AvahiKey *k) {
468 return strlen(k->name)+1+4;
471 size_t avahi_record_get_estimate_size(AvahiRecord *r) {
475 n = avahi_key_get_estimate_size(r->key) + 4 + 2;
477 switch (r->key->type) {
478 case AVAHI_DNS_TYPE_PTR:
479 case AVAHI_DNS_TYPE_CNAME:
480 case AVAHI_DNS_TYPE_NS:
481 n += strlen(r->data.ptr.name) + 1;
484 case AVAHI_DNS_TYPE_SRV:
485 n += 6 + strlen(r->data.srv.name) + 1;
488 case AVAHI_DNS_TYPE_HINFO:
489 n += strlen(r->data.hinfo.os) + 1 + strlen(r->data.hinfo.cpu) + 1;
492 case AVAHI_DNS_TYPE_TXT:
493 n += avahi_string_list_serialize(r->data.txt.string_list, NULL, 0);
496 case AVAHI_DNS_TYPE_A:
497 n += sizeof(AvahiIPv4Address);
500 case AVAHI_DNS_TYPE_AAAA:
501 n += sizeof(AvahiIPv6Address);
505 n += r->data.generic.size;
511 static int lexicographical_memcmp(const void* a, size_t al, const void* b, size_t bl) {
518 c = al < bl ? al : bl;
519 if ((ret = memcmp(a, b, c)))
525 return al == c ? 1 : -1;
528 static int uint16_cmp(uint16_t a, uint16_t b) {
529 return a == b ? 0 : (a < b ? -1 : 1);
532 int avahi_record_lexicographical_compare(AvahiRecord *a, AvahiRecord *b) {
539 /* t1 = avahi_record_to_string(a); */
540 /* t2 = avahi_record_to_string(b); */
541 /* g_message("lexicocmp: %s %s", t1, t2); */
542 /* avahi_free(t1); */
543 /* avahi_free(t2); */
548 if ((r = uint16_cmp(a->key->clazz, b->key->clazz)) ||
549 (r = uint16_cmp(a->key->type, b->key->type)))
552 switch (a->key->type) {
554 case AVAHI_DNS_TYPE_PTR:
555 case AVAHI_DNS_TYPE_CNAME:
556 case AVAHI_DNS_TYPE_NS:
557 return avahi_binary_domain_cmp(a->data.ptr.name, b->data.ptr.name);
559 case AVAHI_DNS_TYPE_SRV: {
560 if ((r = uint16_cmp(a->data.srv.priority, b->data.srv.priority)) == 0 &&
561 (r = uint16_cmp(a->data.srv.weight, b->data.srv.weight)) == 0 &&
562 (r = uint16_cmp(a->data.srv.port, b->data.srv.port)) == 0)
563 r = avahi_binary_domain_cmp(a->data.srv.name, b->data.srv.name);
568 case AVAHI_DNS_TYPE_HINFO: {
570 if ((r = strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu)) ||
571 (r = strcmp(a->data.hinfo.os, b->data.hinfo.os)))
578 case AVAHI_DNS_TYPE_TXT: {
580 uint8_t *ma = NULL, *mb = NULL;
583 asize = avahi_string_list_serialize(a->data.txt.string_list, NULL, 0);
584 bsize = avahi_string_list_serialize(b->data.txt.string_list, NULL, 0);
586 if (asize > 0 && !(ma = avahi_new(uint8_t, asize)))
589 if (bsize > 0 && !(mb = avahi_new(uint8_t, bsize))) {
594 avahi_string_list_serialize(a->data.txt.string_list, ma, asize);
595 avahi_string_list_serialize(b->data.txt.string_list, mb, bsize);
598 r = lexicographical_memcmp(ma, asize, mb, bsize);
599 else if (asize && !bsize)
601 else if (!asize && bsize)
612 case AVAHI_DNS_TYPE_A:
613 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address));
615 case AVAHI_DNS_TYPE_AAAA:
616 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address));
619 return lexicographical_memcmp(a->data.generic.data, a->data.generic.size,
620 b->data.generic.data, b->data.generic.size);
625 avahi_log_error(__FILE__": Out of memory");
626 return -1; /* or whatever ... */
629 int avahi_record_is_goodbye(AvahiRecord *r) {
635 int avahi_key_is_valid(AvahiKey *k) {
638 if (!avahi_is_valid_domain_name(k->name))
644 int avahi_record_is_valid(AvahiRecord *r) {
647 if (!avahi_key_is_valid(r->key))
650 switch (r->key->type) {
652 case AVAHI_DNS_TYPE_PTR:
653 case AVAHI_DNS_TYPE_CNAME:
654 case AVAHI_DNS_TYPE_NS:
655 return avahi_is_valid_domain_name(r->data.ptr.name);
657 case AVAHI_DNS_TYPE_SRV:
658 return avahi_is_valid_domain_name(r->data.srv.name);
660 case AVAHI_DNS_TYPE_HINFO:
662 strlen(r->data.hinfo.os) <= 255 &&
663 strlen(r->data.hinfo.cpu) <= 255;
666 case AVAHI_DNS_TYPE_TXT: {
668 AvahiStringList *strlst;
670 for (strlst = r->data.txt.string_list; strlst; strlst = strlst->next)
671 if (strlst->size > 255)