+++ /dev/null
-/***
- This file is part of avahi.
-
- avahi is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of the
- License, or (at your option) any later version.
-
- avahi is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
- Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with avahi; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- USA.
-***/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <string.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <assert.h>
-
-#include <avahi-common/domain.h>
-#include <avahi-common/malloc.h>
-#include <avahi-common/defs.h>
-
-#include "rr.h"
-#include "log.h"
-#include "util.h"
-#include "hashmap.h"
-#include "domain-util.h"
-#include "rr-util.h"
-#include "addr-util.h"
-
-AvahiKey *avahi_key_new(const char *name, uint16_t class, uint16_t type) {
- AvahiKey *k;
- assert(name);
-
- if (!(k = avahi_new(AvahiKey, 1))) {
- avahi_log_error("avahi_new() failed.");
- return NULL;
- }
-
- if (!(k->name = avahi_normalize_name_strdup(name))) {
- avahi_log_error("avahi_normalize_name() failed.");
- avahi_free(k);
- return NULL;
- }
-
- k->ref = 1;
- k->clazz = class;
- k->type = type;
-
- return k;
-}
-
-AvahiKey *avahi_key_new_cname(AvahiKey *key) {
- assert(key);
-
- if (key->clazz != AVAHI_DNS_CLASS_IN)
- return NULL;
-
- if (key->type == AVAHI_DNS_TYPE_CNAME)
- return NULL;
-
- return avahi_key_new(key->name, key->clazz, AVAHI_DNS_TYPE_CNAME);
-}
-
-AvahiKey *avahi_key_ref(AvahiKey *k) {
- assert(k);
- assert(k->ref >= 1);
-
- k->ref++;
-
- return k;
-}
-
-void avahi_key_unref(AvahiKey *k) {
- assert(k);
- assert(k->ref >= 1);
-
- if ((--k->ref) <= 0) {
- avahi_free(k->name);
- avahi_free(k);
- }
-}
-
-AvahiRecord *avahi_record_new(AvahiKey *k, uint32_t ttl) {
- AvahiRecord *r;
-
- assert(k);
-
- if (!(r = avahi_new(AvahiRecord, 1))) {
- avahi_log_error("avahi_new() failed.");
- return NULL;
- }
-
- r->ref = 1;
- r->key = avahi_key_ref(k);
-
- memset(&r->data, 0, sizeof(r->data));
-
- r->ttl = ttl != (uint32_t) -1 ? ttl : AVAHI_DEFAULT_TTL;
-
- return r;
-}
-
-AvahiRecord *avahi_record_new_full(const char *name, uint16_t class, uint16_t type, uint32_t ttl) {
- AvahiRecord *r;
- AvahiKey *k;
-
- assert(name);
-
- if (!(k = avahi_key_new(name, class, type))) {
- avahi_log_error("avahi_key_new() failed.");
- return NULL;
- }
-
- r = avahi_record_new(k, ttl);
- avahi_key_unref(k);
-
- if (!r) {
- avahi_log_error("avahi_record_new() failed.");
- return NULL;
- }
-
- return r;
-}
-
-AvahiRecord *avahi_record_ref(AvahiRecord *r) {
- assert(r);
- assert(r->ref >= 1);
-
- r->ref++;
- return r;
-}
-
-void avahi_record_unref(AvahiRecord *r) {
- assert(r);
- assert(r->ref >= 1);
-
- if ((--r->ref) <= 0) {
- switch (r->key->type) {
-
- case AVAHI_DNS_TYPE_SRV:
- avahi_free(r->data.srv.name);
- break;
-
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
- avahi_free(r->data.ptr.name);
- break;
-
- case AVAHI_DNS_TYPE_HINFO:
- avahi_free(r->data.hinfo.cpu);
- avahi_free(r->data.hinfo.os);
- break;
-
- case AVAHI_DNS_TYPE_TXT:
- avahi_string_list_free(r->data.txt.string_list);
- break;
-
- case AVAHI_DNS_TYPE_A:
- case AVAHI_DNS_TYPE_AAAA:
- break;
-
- default:
- avahi_free(r->data.generic.data);
- }
-
- avahi_key_unref(r->key);
- avahi_free(r);
- }
-}
-
-const char *avahi_dns_class_to_string(uint16_t class) {
- if (class & AVAHI_DNS_CACHE_FLUSH)
- return "FLUSH";
-
- switch (class) {
- case AVAHI_DNS_CLASS_IN:
- return "IN";
- case AVAHI_DNS_CLASS_ANY:
- return "ANY";
- default:
- return NULL;
- }
-}
-
-const char *avahi_dns_type_to_string(uint16_t type) {
- switch (type) {
- case AVAHI_DNS_TYPE_CNAME:
- return "CNAME";
- case AVAHI_DNS_TYPE_A:
- return "A";
- case AVAHI_DNS_TYPE_AAAA:
- return "AAAA";
- case AVAHI_DNS_TYPE_PTR:
- return "PTR";
- case AVAHI_DNS_TYPE_HINFO:
- return "HINFO";
- case AVAHI_DNS_TYPE_TXT:
- return "TXT";
- case AVAHI_DNS_TYPE_SRV:
- return "SRV";
- case AVAHI_DNS_TYPE_ANY:
- return "ANY";
- case AVAHI_DNS_TYPE_SOA:
- return "SOA";
- case AVAHI_DNS_TYPE_NS:
- return "NS";
- default:
- return NULL;
- }
-}
-
-char *avahi_key_to_string(const AvahiKey *k) {
- char class[16], type[16];
- const char *c, *t;
-
- assert(k);
- assert(k->ref >= 1);
-
- /* According to RFC3597 */
-
- if (!(c = avahi_dns_class_to_string(k->clazz))) {
- snprintf(class, sizeof(class), "CLASS%u", k->clazz);
- c = class;
- }
-
- if (!(t = avahi_dns_type_to_string(k->type))) {
- snprintf(type, sizeof(type), "TYPE%u", k->type);
- t = type;
- }
-
- return avahi_strdup_printf("%s\t%s\t%s", k->name, c, t);
-}
-
-char *avahi_record_to_string(const AvahiRecord *r) {
- char *p, *s;
- char buf[1024], *t = NULL, *d = NULL;
-
- assert(r);
- assert(r->ref >= 1);
-
- switch (r->key->type) {
- case AVAHI_DNS_TYPE_A:
- inet_ntop(AF_INET, &r->data.a.address.address, t = buf, sizeof(buf));
- break;
-
- case AVAHI_DNS_TYPE_AAAA:
- inet_ntop(AF_INET6, &r->data.aaaa.address.address, t = buf, sizeof(buf));
- break;
-
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
-
- t = r->data.ptr.name;
- break;
-
- case AVAHI_DNS_TYPE_TXT:
- t = d = avahi_string_list_to_string(r->data.txt.string_list);
- break;
-
- case AVAHI_DNS_TYPE_HINFO:
-
- snprintf(t = buf, sizeof(buf), "\"%s\" \"%s\"", r->data.hinfo.cpu, r->data.hinfo.os);
- break;
-
- case AVAHI_DNS_TYPE_SRV:
-
- snprintf(t = buf, sizeof(buf), "%u %u %u %s",
- r->data.srv.priority,
- r->data.srv.weight,
- r->data.srv.port,
- r->data.srv.name);
-
- break;
-
- default: {
-
- uint8_t *c;
- uint16_t n;
- int i;
- char *e;
-
- /* According to RFC3597 */
-
- snprintf(t = buf, sizeof(buf), "\\# %u", r->data.generic.size);
-
- e = strchr(t, 0);
-
- for (c = r->data.generic.data, n = r->data.generic.size, i = 0;
- n > 0 && i < 20;
- c ++, n --, i++) {
-
- sprintf(e, " %02X", *c);
- e = strchr(e, 0);
- }
-
- break;
- }
- }
-
- p = avahi_key_to_string(r->key);
- s = avahi_strdup_printf("%s %s ; ttl=%u", p, t, r->ttl);
- avahi_free(p);
- avahi_free(d);
-
- return s;
-}
-
-int avahi_key_equal(const AvahiKey *a, const AvahiKey *b) {
- assert(a);
- assert(b);
-
- if (a == b)
- return 1;
-
- return avahi_domain_equal(a->name, b->name) &&
- a->type == b->type &&
- a->clazz == b->clazz;
-}
-
-int avahi_key_pattern_match(const AvahiKey *pattern, const AvahiKey *k) {
- assert(pattern);
- assert(k);
-
- assert(!avahi_key_is_pattern(k));
-
- if (pattern == k)
- return 1;
-
- return avahi_domain_equal(pattern->name, k->name) &&
- (pattern->type == k->type || pattern->type == AVAHI_DNS_TYPE_ANY) &&
- (pattern->clazz == k->clazz || pattern->clazz == AVAHI_DNS_CLASS_ANY);
-}
-
-int avahi_key_is_pattern(const AvahiKey *k) {
- assert(k);
-
- return
- k->type == AVAHI_DNS_TYPE_ANY ||
- k->clazz == AVAHI_DNS_CLASS_ANY;
-}
-
-unsigned avahi_key_hash(const AvahiKey *k) {
- assert(k);
-
- return
- avahi_domain_hash(k->name) +
- k->type +
- k->clazz;
-}
-
-static int rdata_equal(const AvahiRecord *a, const AvahiRecord *b) {
- assert(a);
- assert(b);
- assert(a->key->type == b->key->type);
-
- switch (a->key->type) {
- case AVAHI_DNS_TYPE_SRV:
- return
- a->data.srv.priority == b->data.srv.priority &&
- a->data.srv.weight == b->data.srv.weight &&
- a->data.srv.port == b->data.srv.port &&
- avahi_domain_equal(a->data.srv.name, b->data.srv.name);
-
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
- return avahi_domain_equal(a->data.ptr.name, b->data.ptr.name);
-
- case AVAHI_DNS_TYPE_HINFO:
- return
- !strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu) &&
- !strcmp(a->data.hinfo.os, b->data.hinfo.os);
-
- case AVAHI_DNS_TYPE_TXT:
- return avahi_string_list_equal(a->data.txt.string_list, b->data.txt.string_list);
-
- case AVAHI_DNS_TYPE_A:
- return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address)) == 0;
-
- case AVAHI_DNS_TYPE_AAAA:
- return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address)) == 0;
-
- default:
- return a->data.generic.size == b->data.generic.size &&
- (a->data.generic.size == 0 || memcmp(a->data.generic.data, b->data.generic.data, a->data.generic.size) == 0);
- }
-
-}
-
-int avahi_record_equal_no_ttl(const AvahiRecord *a, const AvahiRecord *b) {
- assert(a);
- assert(b);
-
- if (a == b)
- return 1;
-
- return
- avahi_key_equal(a->key, b->key) &&
- rdata_equal(a, b);
-}
-
-
-AvahiRecord *avahi_record_copy(AvahiRecord *r) {
- AvahiRecord *copy;
-
- if (!(copy = avahi_new(AvahiRecord, 1))) {
- avahi_log_error("avahi_new() failed.");
- return NULL;
- }
-
- copy->ref = 1;
- copy->key = avahi_key_ref(r->key);
- copy->ttl = r->ttl;
-
- switch (r->key->type) {
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
- if (!(copy->data.ptr.name = avahi_strdup(r->data.ptr.name)))
- goto fail;
- break;
-
- case AVAHI_DNS_TYPE_SRV:
- copy->data.srv.priority = r->data.srv.priority;
- copy->data.srv.weight = r->data.srv.weight;
- copy->data.srv.port = r->data.srv.port;
- if (!(copy->data.srv.name = avahi_strdup(r->data.srv.name)))
- goto fail;
- break;
-
- case AVAHI_DNS_TYPE_HINFO:
- if (!(copy->data.hinfo.os = avahi_strdup(r->data.hinfo.os)))
- goto fail;
-
- if (!(copy->data.hinfo.cpu = avahi_strdup(r->data.hinfo.cpu))) {
- avahi_free(r->data.hinfo.os);
- goto fail;
- }
- break;
-
- case AVAHI_DNS_TYPE_TXT:
- copy->data.txt.string_list = avahi_string_list_copy(r->data.txt.string_list);
- break;
-
- case AVAHI_DNS_TYPE_A:
- copy->data.a.address = r->data.a.address;
- break;
-
- case AVAHI_DNS_TYPE_AAAA:
- copy->data.aaaa.address = r->data.aaaa.address;
- break;
-
- default:
- if (!(copy->data.generic.data = avahi_memdup(r->data.generic.data, r->data.generic.size)))
- goto fail;
- copy->data.generic.size = r->data.generic.size;
- break;
-
- }
-
- return copy;
-
-fail:
- avahi_log_error("Failed to allocate memory");
-
- avahi_key_unref(copy->key);
- avahi_free(copy);
-
- return NULL;
-}
-
-
-size_t avahi_key_get_estimate_size(AvahiKey *k) {
- assert(k);
-
- return strlen(k->name)+1+4;
-}
-
-size_t avahi_record_get_estimate_size(AvahiRecord *r) {
- size_t n;
- assert(r);
-
- n = avahi_key_get_estimate_size(r->key) + 4 + 2;
-
- switch (r->key->type) {
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
- n += strlen(r->data.ptr.name) + 1;
- break;
-
- case AVAHI_DNS_TYPE_SRV:
- n += 6 + strlen(r->data.srv.name) + 1;
- break;
-
- case AVAHI_DNS_TYPE_HINFO:
- n += strlen(r->data.hinfo.os) + 1 + strlen(r->data.hinfo.cpu) + 1;
- break;
-
- case AVAHI_DNS_TYPE_TXT:
- n += avahi_string_list_serialize(r->data.txt.string_list, NULL, 0);
- break;
-
- case AVAHI_DNS_TYPE_A:
- n += sizeof(AvahiIPv4Address);
- break;
-
- case AVAHI_DNS_TYPE_AAAA:
- n += sizeof(AvahiIPv6Address);
- break;
-
- default:
- n += r->data.generic.size;
- }
-
- return n;
-}
-
-static int lexicographical_memcmp(const void* a, size_t al, const void* b, size_t bl) {
- size_t c;
- int ret;
-
- assert(a);
- assert(b);
-
- c = al < bl ? al : bl;
- if ((ret = memcmp(a, b, c)))
- return ret;
-
- if (al == bl)
- return 0;
- else
- return al == c ? 1 : -1;
-}
-
-static int uint16_cmp(uint16_t a, uint16_t b) {
- return a == b ? 0 : (a < b ? -1 : 1);
-}
-
-int avahi_record_lexicographical_compare(AvahiRecord *a, AvahiRecord *b) {
- int r;
-/* char *t1, *t2; */
-
- assert(a);
- assert(b);
-
-/* t1 = avahi_record_to_string(a); */
-/* t2 = avahi_record_to_string(b); */
-/* g_message("lexicocmp: %s %s", t1, t2); */
-/* avahi_free(t1); */
-/* avahi_free(t2); */
-
- if (a == b)
- return 0;
-
- if ((r = uint16_cmp(a->key->clazz, b->key->clazz)) ||
- (r = uint16_cmp(a->key->type, b->key->type)))
- return r;
-
- switch (a->key->type) {
-
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
- return avahi_binary_domain_cmp(a->data.ptr.name, b->data.ptr.name);
-
- case AVAHI_DNS_TYPE_SRV: {
- if ((r = uint16_cmp(a->data.srv.priority, b->data.srv.priority)) == 0 &&
- (r = uint16_cmp(a->data.srv.weight, b->data.srv.weight)) == 0 &&
- (r = uint16_cmp(a->data.srv.port, b->data.srv.port)) == 0)
- r = avahi_binary_domain_cmp(a->data.srv.name, b->data.srv.name);
-
- return r;
- }
-
- case AVAHI_DNS_TYPE_HINFO: {
-
- if ((r = strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu)) ||
- (r = strcmp(a->data.hinfo.os, b->data.hinfo.os)))
- return r;
-
- return 0;
-
- }
-
- case AVAHI_DNS_TYPE_TXT: {
-
- uint8_t *ma = NULL, *mb = NULL;
- size_t asize, bsize;
-
- asize = avahi_string_list_serialize(a->data.txt.string_list, NULL, 0);
- bsize = avahi_string_list_serialize(b->data.txt.string_list, NULL, 0);
-
- if (asize > 0 && !(ma = avahi_new(uint8_t, asize)))
- goto fail;
-
- if (bsize > 0 && !(mb = avahi_new(uint8_t, bsize))) {
- avahi_free(ma);
- goto fail;
- }
-
- avahi_string_list_serialize(a->data.txt.string_list, ma, asize);
- avahi_string_list_serialize(b->data.txt.string_list, mb, bsize);
-
- if (asize && bsize)
- r = lexicographical_memcmp(ma, asize, mb, bsize);
- else if (asize && !bsize)
- r = 1;
- else if (!asize && bsize)
- r = -1;
- else
- r = 0;
-
- avahi_free(ma);
- avahi_free(mb);
-
- return r;
- }
-
- case AVAHI_DNS_TYPE_A:
- return memcmp(&a->data.a.address, &b->data.a.address, sizeof(AvahiIPv4Address));
-
- case AVAHI_DNS_TYPE_AAAA:
- return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(AvahiIPv6Address));
-
- default:
- return lexicographical_memcmp(a->data.generic.data, a->data.generic.size,
- b->data.generic.data, b->data.generic.size);
- }
-
-
-fail:
- avahi_log_error(__FILE__": Out of memory");
- return -1; /* or whatever ... */
-}
-
-int avahi_record_is_goodbye(AvahiRecord *r) {
- assert(r);
-
- return r->ttl == 0;
-}
-
-int avahi_key_is_valid(AvahiKey *k) {
- assert(k);
-
- if (!avahi_is_valid_domain_name(k->name))
- return 0;
-
- return 1;
-}
-
-int avahi_record_is_valid(AvahiRecord *r) {
- assert(r);
-
- if (!avahi_key_is_valid(r->key))
- return 0;
-
- switch (r->key->type) {
-
- case AVAHI_DNS_TYPE_PTR:
- case AVAHI_DNS_TYPE_CNAME:
- case AVAHI_DNS_TYPE_NS:
- return avahi_is_valid_domain_name(r->data.ptr.name);
-
- case AVAHI_DNS_TYPE_SRV:
- return avahi_is_valid_domain_name(r->data.srv.name);
-
- case AVAHI_DNS_TYPE_HINFO:
- return
- strlen(r->data.hinfo.os) <= 255 &&
- strlen(r->data.hinfo.cpu) <= 255;
-
- case AVAHI_DNS_TYPE_TXT: {
-
- AvahiStringList *strlst;
-
- for (strlst = r->data.txt.string_list; strlst; strlst = strlst->next)
- if (strlst->size > 255 || strlst->size <= 0)
- return 0;
-
- return 1;
- }
- }
-
- return 1;
-}
-
-static AvahiAddress *get_address(const AvahiRecord *r, AvahiAddress *a) {
- assert(r);
-
- switch (r->key->type) {
- case AVAHI_DNS_TYPE_A:
- a->proto = AVAHI_PROTO_INET;
- a->data.ipv4 = r->data.a.address;
- break;
-
- case AVAHI_DNS_TYPE_AAAA:
- a->proto = AVAHI_PROTO_INET6;
- a->data.ipv6 = r->data.aaaa.address;
- break;
-
- default:
- return NULL;
- }
-
- return a;
-}
-
-int avahi_record_is_link_local_address(const AvahiRecord *r) {
- AvahiAddress a;
-
- assert(r);
-
- if (!get_address(r, &a))
- return 0;
-
- return avahi_address_is_link_local(&a);
-}
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