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
24 #include <sys/types.h>
25 #include <sys/socket.h>
26 #include <arpa/inet.h>
32 AvahiKey *avahi_key_new(const gchar *name, guint16 class, guint16 type) {
36 k = g_new(AvahiKey, 1);
38 k->name = avahi_normalize_name(name);
42 /* g_message("%p %% ref=1", k); */
47 AvahiKey *avahi_key_ref(AvahiKey *k) {
49 g_assert(k->ref >= 1);
53 /* g_message("%p ++ ref=%i", k, k->ref); */
58 void avahi_key_unref(AvahiKey *k) {
60 g_assert(k->ref >= 1);
62 /* g_message("%p -- ref=%i", k, k->ref-1); */
64 if ((--k->ref) <= 0) {
70 AvahiRecord *avahi_record_new(AvahiKey *k) {
75 r = g_new(AvahiRecord, 1);
77 r->key = avahi_key_ref(k);
79 memset(&r->data, 0, sizeof(r->data));
81 r->ttl = AVAHI_DEFAULT_TTL;
86 AvahiRecord *avahi_record_new_full(const gchar *name, guint16 class, guint16 type) {
92 k = avahi_key_new(name, class, type);
93 r = avahi_record_new(k);
99 AvahiRecord *avahi_record_ref(AvahiRecord *r) {
101 g_assert(r->ref >= 1);
107 void avahi_record_unref(AvahiRecord *r) {
109 g_assert(r->ref >= 1);
111 if ((--r->ref) <= 0) {
112 switch (r->key->type) {
114 case AVAHI_DNS_TYPE_SRV:
115 g_free(r->data.srv.name);
118 case AVAHI_DNS_TYPE_PTR:
119 case AVAHI_DNS_TYPE_CNAME:
120 g_free(r->data.ptr.name);
123 case AVAHI_DNS_TYPE_HINFO:
124 g_free(r->data.hinfo.cpu);
125 g_free(r->data.hinfo.os);
128 case AVAHI_DNS_TYPE_TXT:
129 avahi_string_list_free(r->data.txt.string_list);
132 case AVAHI_DNS_TYPE_A:
133 case AVAHI_DNS_TYPE_AAAA:
137 g_free(r->data.generic.data);
140 avahi_key_unref(r->key);
145 const gchar *avahi_dns_class_to_string(guint16 class) {
146 if (class & AVAHI_DNS_CACHE_FLUSH)
149 if (class == AVAHI_DNS_CLASS_IN)
155 const gchar *avahi_dns_type_to_string(guint16 type) {
157 case AVAHI_DNS_TYPE_CNAME:
159 case AVAHI_DNS_TYPE_A:
161 case AVAHI_DNS_TYPE_AAAA:
163 case AVAHI_DNS_TYPE_PTR:
165 case AVAHI_DNS_TYPE_HINFO:
167 case AVAHI_DNS_TYPE_TXT:
169 case AVAHI_DNS_TYPE_SRV:
171 case AVAHI_DNS_TYPE_ANY:
179 gchar *avahi_key_to_string(const AvahiKey *k) {
180 return g_strdup_printf("%s\t%s\t%s",
182 avahi_dns_class_to_string(k->class),
183 avahi_dns_type_to_string(k->type));
186 gchar *avahi_record_to_string(const AvahiRecord *r) {
188 char buf[257], *t = NULL, *d = NULL;
190 switch (r->key->type) {
191 case AVAHI_DNS_TYPE_A:
192 inet_ntop(AF_INET, &r->data.a.address.address, t = buf, sizeof(buf));
195 case AVAHI_DNS_TYPE_AAAA:
196 inet_ntop(AF_INET6, &r->data.aaaa.address.address, t = buf, sizeof(buf));
199 case AVAHI_DNS_TYPE_PTR:
200 case AVAHI_DNS_TYPE_CNAME :
202 t = r->data.ptr.name;
205 case AVAHI_DNS_TYPE_TXT:
206 t = d = avahi_string_list_to_string(r->data.txt.string_list);
209 case AVAHI_DNS_TYPE_HINFO:
211 snprintf(t = buf, sizeof(buf), "\"%s\" \"%s\"", r->data.hinfo.cpu, r->data.hinfo.os);
214 case AVAHI_DNS_TYPE_SRV:
216 snprintf(t = buf, sizeof(buf), "%u %u %u %s",
217 r->data.srv.priority,
225 p = avahi_key_to_string(r->key);
226 s = g_strdup_printf("%s %s ; ttl=%u", p, t ? t : "<unparsable>", r->ttl);
233 gboolean avahi_key_equal(const AvahiKey *a, const AvahiKey *b) {
240 /* g_message("equal: %p %p", a, b); */
242 return avahi_domain_equal(a->name, b->name) &&
243 a->type == b->type &&
244 a->class == b->class;
247 gboolean avahi_key_pattern_match(const AvahiKey *pattern, const AvahiKey *k) {
251 /* g_message("equal: %p %p", a, b); */
253 g_assert(!avahi_key_is_pattern(k));
258 return avahi_domain_equal(pattern->name, k->name) &&
259 (pattern->type == k->type || pattern->type == AVAHI_DNS_TYPE_ANY) &&
260 pattern->class == k->class;
263 gboolean avahi_key_is_pattern(const AvahiKey *k) {
266 return k->type == AVAHI_DNS_TYPE_ANY;
270 guint avahi_key_hash(const AvahiKey *k) {
273 return avahi_domain_hash(k->name) + k->type + k->class;
276 static gboolean rdata_equal(const AvahiRecord *a, const AvahiRecord *b) {
279 g_assert(a->key->type == b->key->type);
281 /* t = avahi_record_to_string(a); */
282 /* g_message("comparing %s", t); */
285 /* t = avahi_record_to_string(b); */
286 /* g_message("and %s", t); */
290 switch (a->key->type) {
291 case AVAHI_DNS_TYPE_SRV:
293 a->data.srv.priority == b->data.srv.priority &&
294 a->data.srv.weight == b->data.srv.weight &&
295 a->data.srv.port == b->data.srv.port &&
296 avahi_domain_equal(a->data.srv.name, b->data.srv.name);
298 case AVAHI_DNS_TYPE_PTR:
299 case AVAHI_DNS_TYPE_CNAME:
300 return avahi_domain_equal(a->data.ptr.name, b->data.ptr.name);
302 case AVAHI_DNS_TYPE_HINFO:
304 !strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu) &&
305 !strcmp(a->data.hinfo.os, b->data.hinfo.os);
307 case AVAHI_DNS_TYPE_TXT:
308 return avahi_string_list_equal(a->data.txt.string_list, b->data.txt.string_list);
310 case AVAHI_DNS_TYPE_A:
311 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address)) == 0;
313 case AVAHI_DNS_TYPE_AAAA:
314 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address)) == 0;
317 return a->data.generic.size == b->data.generic.size &&
318 (a->data.generic.size == 0 || memcmp(a->data.generic.data, b->data.generic.data, a->data.generic.size) == 0);
323 gboolean avahi_record_equal_no_ttl(const AvahiRecord *a, const AvahiRecord *b) {
331 avahi_key_equal(a->key, b->key) &&
336 AvahiRecord *avahi_record_copy(AvahiRecord *r) {
339 copy = g_new(AvahiRecord, 1);
341 copy->key = avahi_key_ref(r->key);
344 switch (r->key->type) {
345 case AVAHI_DNS_TYPE_PTR:
346 case AVAHI_DNS_TYPE_CNAME:
347 copy->data.ptr.name = g_strdup(r->data.ptr.name);
350 case AVAHI_DNS_TYPE_SRV:
351 copy->data.srv.priority = r->data.srv.priority;
352 copy->data.srv.weight = r->data.srv.weight;
353 copy->data.srv.port = r->data.srv.port;
354 copy->data.srv.name = g_strdup(r->data.srv.name);
357 case AVAHI_DNS_TYPE_HINFO:
358 copy->data.hinfo.os = g_strdup(r->data.hinfo.os);
359 copy->data.hinfo.cpu = g_strdup(r->data.hinfo.cpu);
362 case AVAHI_DNS_TYPE_TXT:
363 copy->data.txt.string_list = avahi_string_list_copy(r->data.txt.string_list);
366 case AVAHI_DNS_TYPE_A:
367 copy->data.a.address = r->data.a.address;
370 case AVAHI_DNS_TYPE_AAAA:
371 copy->data.aaaa.address = r->data.aaaa.address;
375 copy->data.generic.data = g_memdup(r->data.generic.data, r->data.generic.size);
376 copy->data.generic.size = r->data.generic.size;
385 guint avahi_key_get_estimate_size(AvahiKey *k) {
388 return strlen(k->name)+1+4;
391 guint avahi_record_get_estimate_size(AvahiRecord *r) {
395 n = avahi_key_get_estimate_size(r->key) + 4 + 2;
397 switch (r->key->type) {
398 case AVAHI_DNS_TYPE_PTR:
399 case AVAHI_DNS_TYPE_CNAME:
400 n += strlen(r->data.ptr.name) + 1;
403 case AVAHI_DNS_TYPE_SRV:
404 n += 6 + strlen(r->data.srv.name) + 1;
407 case AVAHI_DNS_TYPE_HINFO:
408 n += strlen(r->data.hinfo.os) + 1 + strlen(r->data.hinfo.cpu) + 1;
411 case AVAHI_DNS_TYPE_TXT:
412 n += avahi_string_list_serialize(r->data.txt.string_list, NULL, 0);
415 case AVAHI_DNS_TYPE_A:
416 n += sizeof(AvahiIPv4Address);
419 case AVAHI_DNS_TYPE_AAAA:
420 n += sizeof(AvahiIPv6Address);
424 n += r->data.generic.size;
430 static gint lexicographical_memcmp(gconstpointer a, size_t al, gconstpointer b, size_t bl) {
437 c = al < bl ? al : bl;
438 if ((ret = memcmp(a, b, c)) != 0)
444 return al == c ? 1 : -1;
447 static gint uint16_cmp(guint16 a, guint16 b) {
448 return a == b ? 0 : (a < b ? a : b);
451 static gint lexicographical_domain_cmp(const gchar *a, const gchar *b) {
471 avahi_unescape_label(t1, sizeof(t1), &a);
472 avahi_unescape_label(t2, sizeof(t2), &b);
478 return al < bl ? -1 : 1;
480 if ((r = strcmp(t1, t2)) != 0)
485 gint avahi_record_lexicographical_compare(AvahiRecord *a, AvahiRecord *b) {
494 /* g_message("comparing [%s]", t = avahi_record_to_string(a)); */
497 /* g_message("and [%s]", t = avahi_record_to_string(b)); */
500 if (a->key->class < b->key->class)
502 else if (a->key->class > b->key->class)
505 if (a->key->type < b->key->type)
507 else if (a->key->type > b->key->type)
510 switch (a->key->type) {
512 case AVAHI_DNS_TYPE_PTR:
513 case AVAHI_DNS_TYPE_CNAME:
514 return lexicographical_domain_cmp(a->data.ptr.name, b->data.ptr.name);
516 case AVAHI_DNS_TYPE_SRV: {
518 if ((r = uint16_cmp(a->data.srv.priority, b->data.srv.priority)) == 0 &&
519 (r = uint16_cmp(a->data.srv.weight, b->data.srv.weight)) == 0 &&
520 (r = uint16_cmp(a->data.srv.port, b->data.srv.port)) == 0)
521 r = lexicographical_domain_cmp(a->data.srv.name, b->data.srv.name);
526 case AVAHI_DNS_TYPE_HINFO: {
527 size_t al = strlen(a->data.hinfo.cpu), bl = strlen(b->data.hinfo.cpu);
531 return al < bl ? -1 : 1;
533 if ((r = strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu)) != 0)
536 al = strlen(a->data.hinfo.os), bl = strlen(b->data.hinfo.os);
539 return al < bl ? -1 : 1;
541 if ((r = strcmp(a->data.hinfo.os, b->data.hinfo.os)) != 0)
548 case AVAHI_DNS_TYPE_TXT: {
554 ma = g_new(guint8, asize = avahi_string_list_serialize(a->data.txt.string_list, NULL, 0));
555 mb = g_new(guint8, bsize = avahi_string_list_serialize(b->data.txt.string_list, NULL, 0));
556 avahi_string_list_serialize(a->data.txt.string_list, ma, asize);
557 avahi_string_list_serialize(a->data.txt.string_list, mb, bsize);
559 r = lexicographical_memcmp(ma, asize, mb, bsize);
566 case AVAHI_DNS_TYPE_A:
567 return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address));
569 case AVAHI_DNS_TYPE_AAAA:
570 return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address));
573 return lexicographical_memcmp(a->data.generic.data, a->data.generic.size,
574 b->data.generic.data, b->data.generic.size);