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>
41 AvahiKey *avahi_key_new(const char *name, uint16_t class, uint16_t type) {
45 if (!(k = avahi_new(AvahiKey, 1))) {
46 avahi_log_error("avahi_new() failed.");
50 if (!(k->name = avahi_normalize_name(name))) {
51 avahi_log_error("avahi_normalize_name() failed.");
63 AvahiKey *avahi_key_new_cname(AvahiKey *key) {
66 if (key->clazz != AVAHI_DNS_CLASS_IN)
69 if (key->type == AVAHI_DNS_TYPE_CNAME)
72 return avahi_key_new(key->name, key->clazz, AVAHI_DNS_TYPE_CNAME);
76 AvahiKey *avahi_key_ref(AvahiKey *k) {
85 void avahi_key_unref(AvahiKey *k) {
89 if ((--k->ref) <= 0) {
95 AvahiRecord *avahi_record_new(AvahiKey *k, uint32_t ttl) {
100 if (!(r = avahi_new(AvahiRecord, 1))) {
101 avahi_log_error("avahi_new() failed.");
106 r->key = avahi_key_ref(k);
108 memset(&r->data, 0, sizeof(r->data));
110 r->ttl = ttl != (uint32_t) -1 ? ttl : AVAHI_DEFAULT_TTL;
115 AvahiRecord *avahi_record_new_full(const char *name, uint16_t class, uint16_t type, uint32_t ttl) {
121 if (!(k = avahi_key_new(name, class, type))) {
122 avahi_log_error("avahi_key_new() failed.");
126 r = avahi_record_new(k, ttl);
130 avahi_log_error("avahi_record_new() failed.");
137 AvahiRecord *avahi_record_ref(AvahiRecord *r) {
145 void avahi_record_unref(AvahiRecord *r) {
149 if ((--r->ref) <= 0) {
150 switch (r->key->type) {
152 case AVAHI_DNS_TYPE_SRV:
153 avahi_free(r->data.srv.name);
156 case AVAHI_DNS_TYPE_PTR:
157 case AVAHI_DNS_TYPE_CNAME:
158 avahi_free(r->data.ptr.name);
161 case AVAHI_DNS_TYPE_HINFO:
162 avahi_free(r->data.hinfo.cpu);
163 avahi_free(r->data.hinfo.os);
166 case AVAHI_DNS_TYPE_TXT:
167 avahi_string_list_free(r->data.txt.string_list);
170 case AVAHI_DNS_TYPE_A:
171 case AVAHI_DNS_TYPE_AAAA:
175 avahi_free(r->data.generic.data);
178 avahi_key_unref(r->key);
183 const char *avahi_dns_class_to_string(uint16_t class) {
184 if (class & AVAHI_DNS_CACHE_FLUSH)
188 case AVAHI_DNS_CLASS_IN:
190 case AVAHI_DNS_CLASS_ANY:
197 const char *avahi_dns_type_to_string(uint16_t type) {
199 case AVAHI_DNS_TYPE_CNAME:
201 case AVAHI_DNS_TYPE_A:
203 case AVAHI_DNS_TYPE_AAAA:
205 case AVAHI_DNS_TYPE_PTR:
207 case AVAHI_DNS_TYPE_HINFO:
209 case AVAHI_DNS_TYPE_TXT:
211 case AVAHI_DNS_TYPE_SRV:
213 case AVAHI_DNS_TYPE_ANY:
220 char *avahi_key_to_string(const AvahiKey *k) {
224 return avahi_strdup_printf("%s\t%s\t%s",
226 avahi_dns_class_to_string(k->clazz),
227 avahi_dns_type_to_string(k->type));
230 char *avahi_record_to_string(const AvahiRecord *r) {
232 char buf[257], *t = NULL, *d = NULL;
237 switch (r->key->type) {
238 case AVAHI_DNS_TYPE_A:
239 inet_ntop(AF_INET, &r->data.a.address.address, t = buf, sizeof(buf));
242 case AVAHI_DNS_TYPE_AAAA:
243 inet_ntop(AF_INET6, &r->data.aaaa.address.address, t = buf, sizeof(buf));
246 case AVAHI_DNS_TYPE_PTR:
247 case AVAHI_DNS_TYPE_CNAME :
249 t = r->data.ptr.name;
252 case AVAHI_DNS_TYPE_TXT:
253 t = d = avahi_string_list_to_string(r->data.txt.string_list);
256 case AVAHI_DNS_TYPE_HINFO:
258 snprintf(t = buf, sizeof(buf), "\"%s\" \"%s\"", r->data.hinfo.cpu, r->data.hinfo.os);
261 case AVAHI_DNS_TYPE_SRV:
263 snprintf(t = buf, sizeof(buf), "%u %u %u %s",
264 r->data.srv.priority,
272 p = avahi_key_to_string(r->key);
273 s = avahi_strdup_printf("%s %s ; ttl=%u", p, t ? t : "<unparsable>", r->ttl);
280 int avahi_key_equal(const AvahiKey *a, const AvahiKey *b) {
287 /* g_message("equal: %p %p", a, b); */
289 return avahi_domain_equal(a->name, b->name) &&
290 a->type == b->type &&
291 a->clazz == b->clazz;
294 int avahi_key_pattern_match(const AvahiKey *pattern, const AvahiKey *k) {
298 /* g_message("equal: %p %p", a, b); */
300 assert(!avahi_key_is_pattern(k));
305 return avahi_domain_equal(pattern->name, k->name) &&
306 (pattern->type == k->type || pattern->type == AVAHI_DNS_TYPE_ANY) &&
307 (pattern->clazz == k->clazz || pattern->clazz == AVAHI_DNS_CLASS_ANY);
310 int avahi_key_is_pattern(const AvahiKey *k) {
314 k->type == AVAHI_DNS_TYPE_ANY ||
315 k->clazz == AVAHI_DNS_CLASS_ANY;
318 unsigned avahi_key_hash(const AvahiKey *k) {
322 avahi_domain_hash(k->name) +
327 static int rdata_equal(const AvahiRecord *a, const AvahiRecord *b) {
330 assert(a->key->type == b->key->type);
332 /* t = avahi_record_to_string(a); */
333 /* g_message("comparing %s", t); */
336 /* t = avahi_record_to_string(b); */
337 /* g_message("and %s", t); */
341 switch (a->key->type) {
342 case AVAHI_DNS_TYPE_SRV:
344 a->data.srv.priority == b->data.srv.priority &&
345 a->data.srv.weight == b->data.srv.weight &&
346 a->data.srv.port == b->data.srv.port &&
347 avahi_domain_equal(a->data.srv.name, b->data.srv.name);
349 case AVAHI_DNS_TYPE_PTR:
350 case AVAHI_DNS_TYPE_CNAME:
351 return avahi_domain_equal(a->data.ptr.name, b->data.ptr.name);
353 case AVAHI_DNS_TYPE_HINFO:
355 !strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu) &&
356 !strcmp(a->data.hinfo.os, b->data.hinfo.os);
358 case AVAHI_DNS_TYPE_TXT:
359 return avahi_string_list_equal(a->data.txt.string_list, b->data.txt.string_list);
361 case AVAHI_DNS_TYPE_A:
362 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address)) == 0;
364 case AVAHI_DNS_TYPE_AAAA:
365 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address)) == 0;
368 return a->data.generic.size == b->data.generic.size &&
369 (a->data.generic.size == 0 || memcmp(a->data.generic.data, b->data.generic.data, a->data.generic.size) == 0);
374 int avahi_record_equal_no_ttl(const AvahiRecord *a, const AvahiRecord *b) {
382 avahi_key_equal(a->key, b->key) &&
387 AvahiRecord *avahi_record_copy(AvahiRecord *r) {
390 if (!(copy = avahi_new(AvahiRecord, 1))) {
391 avahi_log_error("avahi_new() failed.");
396 copy->key = avahi_key_ref(r->key);
399 switch (r->key->type) {
400 case AVAHI_DNS_TYPE_PTR:
401 case AVAHI_DNS_TYPE_CNAME:
402 if (!(copy->data.ptr.name = avahi_strdup(r->data.ptr.name)))
406 case AVAHI_DNS_TYPE_SRV:
407 copy->data.srv.priority = r->data.srv.priority;
408 copy->data.srv.weight = r->data.srv.weight;
409 copy->data.srv.port = r->data.srv.port;
410 if (!(copy->data.srv.name = avahi_strdup(r->data.srv.name)))
414 case AVAHI_DNS_TYPE_HINFO:
415 if (!(copy->data.hinfo.os = avahi_strdup(r->data.hinfo.os)))
418 if (!(copy->data.hinfo.cpu = avahi_strdup(r->data.hinfo.cpu))) {
419 avahi_free(r->data.hinfo.os);
424 case AVAHI_DNS_TYPE_TXT:
425 copy->data.txt.string_list = avahi_string_list_copy(r->data.txt.string_list);
428 case AVAHI_DNS_TYPE_A:
429 copy->data.a.address = r->data.a.address;
432 case AVAHI_DNS_TYPE_AAAA:
433 copy->data.aaaa.address = r->data.aaaa.address;
437 if (!(copy->data.generic.data = avahi_memdup(r->data.generic.data, r->data.generic.size)))
439 copy->data.generic.size = r->data.generic.size;
447 avahi_log_error("Failed to allocate memory");
449 avahi_key_unref(copy->key);
456 size_t avahi_key_get_estimate_size(AvahiKey *k) {
459 return strlen(k->name)+1+4;
462 size_t avahi_record_get_estimate_size(AvahiRecord *r) {
466 n = avahi_key_get_estimate_size(r->key) + 4 + 2;
468 switch (r->key->type) {
469 case AVAHI_DNS_TYPE_PTR:
470 case AVAHI_DNS_TYPE_CNAME:
471 n += strlen(r->data.ptr.name) + 1;
474 case AVAHI_DNS_TYPE_SRV:
475 n += 6 + strlen(r->data.srv.name) + 1;
478 case AVAHI_DNS_TYPE_HINFO:
479 n += strlen(r->data.hinfo.os) + 1 + strlen(r->data.hinfo.cpu) + 1;
482 case AVAHI_DNS_TYPE_TXT:
483 n += avahi_string_list_serialize(r->data.txt.string_list, NULL, 0);
486 case AVAHI_DNS_TYPE_A:
487 n += sizeof(AvahiIPv4Address);
490 case AVAHI_DNS_TYPE_AAAA:
491 n += sizeof(AvahiIPv6Address);
495 n += r->data.generic.size;
501 static int lexicographical_memcmp(const void* a, size_t al, const void* b, size_t bl) {
508 c = al < bl ? al : bl;
509 if ((ret = memcmp(a, b, c)))
515 return al == c ? 1 : -1;
518 static int uint16_cmp(uint16_t a, uint16_t b) {
519 return a == b ? 0 : (a < b ? -1 : 1);
522 int avahi_record_lexicographical_compare(AvahiRecord *a, AvahiRecord *b) {
529 /* t1 = avahi_record_to_string(a); */
530 /* t2 = avahi_record_to_string(b); */
531 /* g_message("lexicocmp: %s %s", t1, t2); */
532 /* avahi_free(t1); */
533 /* avahi_free(t2); */
538 if ((r = uint16_cmp(a->key->clazz, b->key->clazz)) ||
539 (r = uint16_cmp(a->key->type, b->key->type)))
542 switch (a->key->type) {
544 case AVAHI_DNS_TYPE_PTR:
545 case AVAHI_DNS_TYPE_CNAME:
546 return avahi_binary_domain_cmp(a->data.ptr.name, b->data.ptr.name);
548 case AVAHI_DNS_TYPE_SRV: {
549 if ((r = uint16_cmp(a->data.srv.priority, b->data.srv.priority)) == 0 &&
550 (r = uint16_cmp(a->data.srv.weight, b->data.srv.weight)) == 0 &&
551 (r = uint16_cmp(a->data.srv.port, b->data.srv.port)) == 0)
552 r = avahi_binary_domain_cmp(a->data.srv.name, b->data.srv.name);
557 case AVAHI_DNS_TYPE_HINFO: {
559 if ((r = strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu)) ||
560 (r = strcmp(a->data.hinfo.os, b->data.hinfo.os)))
567 case AVAHI_DNS_TYPE_TXT: {
569 uint8_t *ma = NULL, *mb = NULL;
572 asize = avahi_string_list_serialize(a->data.txt.string_list, NULL, 0);
573 bsize = avahi_string_list_serialize(b->data.txt.string_list, NULL, 0);
575 if (asize > 0 && !(ma = avahi_new(uint8_t, asize)))
578 if (bsize > 0 && !(mb = avahi_new(uint8_t, bsize))) {
583 avahi_string_list_serialize(a->data.txt.string_list, ma, asize);
584 avahi_string_list_serialize(b->data.txt.string_list, mb, bsize);
587 r = lexicographical_memcmp(ma, asize, mb, bsize);
588 else if (asize && !bsize)
590 else if (!asize && bsize)
601 case AVAHI_DNS_TYPE_A:
602 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address));
604 case AVAHI_DNS_TYPE_AAAA:
605 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address));
608 return lexicographical_memcmp(a->data.generic.data, a->data.generic.size,
609 b->data.generic.data, b->data.generic.size);
614 avahi_log_error(__FILE__": Out of memory");
615 return -1; /* or whatever ... */
618 int avahi_record_is_goodbye(AvahiRecord *r) {
624 int avahi_key_is_valid(AvahiKey *k) {
627 if (!avahi_is_valid_domain_name(k->name))
633 int avahi_record_is_valid(AvahiRecord *r) {
636 if (!avahi_key_is_valid(r->key))
639 switch (r->key->type) {
641 case AVAHI_DNS_TYPE_PTR:
642 case AVAHI_DNS_TYPE_CNAME:
643 return avahi_is_valid_domain_name(r->data.ptr.name);
645 case AVAHI_DNS_TYPE_SRV:
646 return avahi_is_valid_domain_name(r->data.srv.name);
648 case AVAHI_DNS_TYPE_HINFO:
650 strlen(r->data.hinfo.os) <= 255 &&
651 strlen(r->data.hinfo.cpu) <= 255;
654 case AVAHI_DNS_TYPE_TXT: {
656 AvahiStringList *strlst;
658 for (strlst = r->data.txt.string_list; strlst; strlst = strlst->next)
659 if (strlst->size > 255)