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>
36 AvahiKey *avahi_key_new(const gchar *name, guint16 class, guint16 type) {
40 k = g_new(AvahiKey, 1);
42 k->name = avahi_normalize_name(name);
46 /* g_message("%p %% ref=1", k); */
51 AvahiKey *avahi_key_ref(AvahiKey *k) {
53 g_assert(k->ref >= 1);
57 /* g_message("%p ++ ref=%i", k, k->ref); */
62 void avahi_key_unref(AvahiKey *k) {
64 g_assert(k->ref >= 1);
66 /* g_message("%p -- ref=%i", k, k->ref-1); */
68 if ((--k->ref) <= 0) {
74 AvahiRecord *avahi_record_new(AvahiKey *k) {
79 r = g_new(AvahiRecord, 1);
81 r->key = avahi_key_ref(k);
83 memset(&r->data, 0, sizeof(r->data));
85 r->ttl = AVAHI_DEFAULT_TTL;
90 AvahiRecord *avahi_record_new_full(const gchar *name, guint16 class, guint16 type) {
96 k = avahi_key_new(name, class, type);
97 r = avahi_record_new(k);
103 AvahiRecord *avahi_record_ref(AvahiRecord *r) {
105 g_assert(r->ref >= 1);
111 void avahi_record_unref(AvahiRecord *r) {
113 g_assert(r->ref >= 1);
115 if ((--r->ref) <= 0) {
116 switch (r->key->type) {
118 case AVAHI_DNS_TYPE_SRV:
119 g_free(r->data.srv.name);
122 case AVAHI_DNS_TYPE_PTR:
123 case AVAHI_DNS_TYPE_CNAME:
124 g_free(r->data.ptr.name);
127 case AVAHI_DNS_TYPE_HINFO:
128 g_free(r->data.hinfo.cpu);
129 g_free(r->data.hinfo.os);
132 case AVAHI_DNS_TYPE_TXT:
133 avahi_string_list_free(r->data.txt.string_list);
136 case AVAHI_DNS_TYPE_A:
137 case AVAHI_DNS_TYPE_AAAA:
141 g_free(r->data.generic.data);
144 avahi_key_unref(r->key);
149 const gchar *avahi_dns_class_to_string(guint16 class) {
150 if (class & AVAHI_DNS_CACHE_FLUSH)
153 if (class == AVAHI_DNS_CLASS_IN)
159 const gchar *avahi_dns_type_to_string(guint16 type) {
161 case AVAHI_DNS_TYPE_CNAME:
163 case AVAHI_DNS_TYPE_A:
165 case AVAHI_DNS_TYPE_AAAA:
167 case AVAHI_DNS_TYPE_PTR:
169 case AVAHI_DNS_TYPE_HINFO:
171 case AVAHI_DNS_TYPE_TXT:
173 case AVAHI_DNS_TYPE_SRV:
175 case AVAHI_DNS_TYPE_ANY:
183 gchar *avahi_key_to_string(const AvahiKey *k) {
185 g_assert(k->ref >= 1);
187 return g_strdup_printf("%s\t%s\t%s",
189 avahi_dns_class_to_string(k->class),
190 avahi_dns_type_to_string(k->type));
193 gchar *avahi_record_to_string(const AvahiRecord *r) {
195 char buf[257], *t = NULL, *d = NULL;
198 g_assert(r->ref >= 1);
200 switch (r->key->type) {
201 case AVAHI_DNS_TYPE_A:
202 inet_ntop(AF_INET, &r->data.a.address.address, t = buf, sizeof(buf));
205 case AVAHI_DNS_TYPE_AAAA:
206 inet_ntop(AF_INET6, &r->data.aaaa.address.address, t = buf, sizeof(buf));
209 case AVAHI_DNS_TYPE_PTR:
210 case AVAHI_DNS_TYPE_CNAME :
212 t = r->data.ptr.name;
215 case AVAHI_DNS_TYPE_TXT:
216 t = d = avahi_string_list_to_string(r->data.txt.string_list);
219 case AVAHI_DNS_TYPE_HINFO:
221 snprintf(t = buf, sizeof(buf), "\"%s\" \"%s\"", r->data.hinfo.cpu, r->data.hinfo.os);
224 case AVAHI_DNS_TYPE_SRV:
226 snprintf(t = buf, sizeof(buf), "%u %u %u %s",
227 r->data.srv.priority,
235 p = avahi_key_to_string(r->key);
236 s = g_strdup_printf("%s %s ; ttl=%u", p, t ? t : "<unparsable>", r->ttl);
243 gboolean avahi_key_equal(const AvahiKey *a, const AvahiKey *b) {
250 /* g_message("equal: %p %p", a, b); */
252 return avahi_domain_equal(a->name, b->name) &&
253 a->type == b->type &&
254 a->class == b->class;
257 gboolean avahi_key_pattern_match(const AvahiKey *pattern, const AvahiKey *k) {
261 /* g_message("equal: %p %p", a, b); */
263 g_assert(!avahi_key_is_pattern(k));
268 return avahi_domain_equal(pattern->name, k->name) &&
269 (pattern->type == k->type || pattern->type == AVAHI_DNS_TYPE_ANY) &&
270 pattern->class == k->class;
273 gboolean avahi_key_is_pattern(const AvahiKey *k) {
276 return k->type == AVAHI_DNS_TYPE_ANY;
280 guint avahi_key_hash(const AvahiKey *k) {
284 avahi_domain_hash(k->name) +
289 static gboolean rdata_equal(const AvahiRecord *a, const AvahiRecord *b) {
292 g_assert(a->key->type == b->key->type);
294 /* t = avahi_record_to_string(a); */
295 /* g_message("comparing %s", t); */
298 /* t = avahi_record_to_string(b); */
299 /* g_message("and %s", t); */
303 switch (a->key->type) {
304 case AVAHI_DNS_TYPE_SRV:
306 a->data.srv.priority == b->data.srv.priority &&
307 a->data.srv.weight == b->data.srv.weight &&
308 a->data.srv.port == b->data.srv.port &&
309 avahi_domain_equal(a->data.srv.name, b->data.srv.name);
311 case AVAHI_DNS_TYPE_PTR:
312 case AVAHI_DNS_TYPE_CNAME:
313 return avahi_domain_equal(a->data.ptr.name, b->data.ptr.name);
315 case AVAHI_DNS_TYPE_HINFO:
317 !g_utf8_collate(a->data.hinfo.cpu, b->data.hinfo.cpu) &&
318 !g_utf8_collate(a->data.hinfo.os, b->data.hinfo.os);
320 case AVAHI_DNS_TYPE_TXT:
321 return avahi_string_list_equal(a->data.txt.string_list, b->data.txt.string_list);
323 case AVAHI_DNS_TYPE_A:
324 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address)) == 0;
326 case AVAHI_DNS_TYPE_AAAA:
327 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address)) == 0;
330 return a->data.generic.size == b->data.generic.size &&
331 (a->data.generic.size == 0 || memcmp(a->data.generic.data, b->data.generic.data, a->data.generic.size) == 0);
336 gboolean avahi_record_equal_no_ttl(const AvahiRecord *a, const AvahiRecord *b) {
344 avahi_key_equal(a->key, b->key) &&
349 AvahiRecord *avahi_record_copy(AvahiRecord *r) {
352 copy = g_new(AvahiRecord, 1);
354 copy->key = avahi_key_ref(r->key);
357 switch (r->key->type) {
358 case AVAHI_DNS_TYPE_PTR:
359 case AVAHI_DNS_TYPE_CNAME:
360 copy->data.ptr.name = g_strdup(r->data.ptr.name);
363 case AVAHI_DNS_TYPE_SRV:
364 copy->data.srv.priority = r->data.srv.priority;
365 copy->data.srv.weight = r->data.srv.weight;
366 copy->data.srv.port = r->data.srv.port;
367 copy->data.srv.name = g_strdup(r->data.srv.name);
370 case AVAHI_DNS_TYPE_HINFO:
371 copy->data.hinfo.os = g_strdup(r->data.hinfo.os);
372 copy->data.hinfo.cpu = g_strdup(r->data.hinfo.cpu);
375 case AVAHI_DNS_TYPE_TXT:
376 copy->data.txt.string_list = avahi_string_list_copy(r->data.txt.string_list);
379 case AVAHI_DNS_TYPE_A:
380 copy->data.a.address = r->data.a.address;
383 case AVAHI_DNS_TYPE_AAAA:
384 copy->data.aaaa.address = r->data.aaaa.address;
388 copy->data.generic.data = g_memdup(r->data.generic.data, r->data.generic.size);
389 copy->data.generic.size = r->data.generic.size;
398 guint avahi_key_get_estimate_size(AvahiKey *k) {
401 return strlen(k->name)+1+4;
404 guint avahi_record_get_estimate_size(AvahiRecord *r) {
408 n = avahi_key_get_estimate_size(r->key) + 4 + 2;
410 switch (r->key->type) {
411 case AVAHI_DNS_TYPE_PTR:
412 case AVAHI_DNS_TYPE_CNAME:
413 n += strlen(r->data.ptr.name) + 1;
416 case AVAHI_DNS_TYPE_SRV:
417 n += 6 + strlen(r->data.srv.name) + 1;
420 case AVAHI_DNS_TYPE_HINFO:
421 n += strlen(r->data.hinfo.os) + 1 + strlen(r->data.hinfo.cpu) + 1;
424 case AVAHI_DNS_TYPE_TXT:
425 n += avahi_string_list_serialize(r->data.txt.string_list, NULL, 0);
428 case AVAHI_DNS_TYPE_A:
429 n += sizeof(AvahiIPv4Address);
432 case AVAHI_DNS_TYPE_AAAA:
433 n += sizeof(AvahiIPv6Address);
437 n += r->data.generic.size;
443 static gint lexicographical_memcmp(gconstpointer a, size_t al, gconstpointer b, size_t bl) {
450 c = al < bl ? al : bl;
451 if ((ret = memcmp(a, b, c)))
457 return al == c ? 1 : -1;
460 static gint uint16_cmp(guint16 a, guint16 b) {
461 return a == b ? 0 : (a < b ? -1 : 1);
464 gint avahi_record_lexicographical_compare(AvahiRecord *a, AvahiRecord *b) {
466 /* gchar *t1, *t2; */
471 /* t1 = avahi_record_to_string(a); */
472 /* t2 = avahi_record_to_string(b); */
473 /* g_message("lexicocmp: %s %s", t1, t2); */
480 if ((r = uint16_cmp(a->key->class, b->key->class)) ||
481 (r = uint16_cmp(a->key->type, b->key->type)))
484 switch (a->key->type) {
486 case AVAHI_DNS_TYPE_PTR:
487 case AVAHI_DNS_TYPE_CNAME:
488 return avahi_binary_domain_cmp(a->data.ptr.name, b->data.ptr.name);
490 case AVAHI_DNS_TYPE_SRV: {
491 if ((r = uint16_cmp(a->data.srv.priority, b->data.srv.priority)) == 0 &&
492 (r = uint16_cmp(a->data.srv.weight, b->data.srv.weight)) == 0 &&
493 (r = uint16_cmp(a->data.srv.port, b->data.srv.port)) == 0)
494 r = avahi_binary_domain_cmp(a->data.srv.name, b->data.srv.name);
499 case AVAHI_DNS_TYPE_HINFO: {
501 if ((r = strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu)) ||
502 (r = strcmp(a->data.hinfo.os, b->data.hinfo.os)))
509 case AVAHI_DNS_TYPE_TXT: {
514 ma = g_new(guint8, asize = avahi_string_list_serialize(a->data.txt.string_list, NULL, 0));
515 mb = g_new(guint8, bsize = avahi_string_list_serialize(b->data.txt.string_list, NULL, 0));
516 avahi_string_list_serialize(a->data.txt.string_list, ma, asize);
517 avahi_string_list_serialize(b->data.txt.string_list, mb, bsize);
520 r = lexicographical_memcmp(ma, asize, mb, bsize);
521 else if (asize && !bsize)
523 else if (!asize && bsize)
534 case AVAHI_DNS_TYPE_A:
535 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address));
537 case AVAHI_DNS_TYPE_AAAA:
538 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address));
541 return lexicographical_memcmp(a->data.generic.data, a->data.generic.size,
542 b->data.generic.data, b->data.generic.size);
547 gboolean avahi_record_is_goodbye(AvahiRecord *r) {