--- /dev/null
+/***
+ This file is part of catta.
+
+ catta 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.
+
+ catta 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 catta; 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 <catta/domain.h>
+#include <catta/malloc.h>
+#include <catta/defs.h>
+
+#include <catta/rr.h>
+#include <catta/log.h>
+#include "util.h"
+#include "hashmap.h"
+#include "domain-util.h"
+#include "rr-util.h"
+#include "addr-util.h"
+
+CattaKey *catta_key_new(const char *name, uint16_t class, uint16_t type) {
+ CattaKey *k;
+ assert(name);
+
+ if (!(k = catta_new(CattaKey, 1))) {
+ catta_log_error("catta_new() failed.");
+ return NULL;
+ }
+
+ if (!(k->name = catta_normalize_name_strdup(name))) {
+ catta_log_error("catta_normalize_name() failed.");
+ catta_free(k);
+ return NULL;
+ }
+
+ k->ref = 1;
+ k->clazz = class;
+ k->type = type;
+
+ return k;
+}
+
+CattaKey *catta_key_new_cname(CattaKey *key) {
+ assert(key);
+
+ if (key->clazz != CATTA_DNS_CLASS_IN)
+ return NULL;
+
+ if (key->type == CATTA_DNS_TYPE_CNAME)
+ return NULL;
+
+ return catta_key_new(key->name, key->clazz, CATTA_DNS_TYPE_CNAME);
+}
+
+CattaKey *catta_key_ref(CattaKey *k) {
+ assert(k);
+ assert(k->ref >= 1);
+
+ k->ref++;
+
+ return k;
+}
+
+void catta_key_unref(CattaKey *k) {
+ assert(k);
+ assert(k->ref >= 1);
+
+ if ((--k->ref) <= 0) {
+ catta_free(k->name);
+ catta_free(k);
+ }
+}
+
+CattaRecord *catta_record_new(CattaKey *k, uint32_t ttl) {
+ CattaRecord *r;
+
+ assert(k);
+
+ if (!(r = catta_new(CattaRecord, 1))) {
+ catta_log_error("catta_new() failed.");
+ return NULL;
+ }
+
+ r->ref = 1;
+ r->key = catta_key_ref(k);
+
+ memset(&r->data, 0, sizeof(r->data));
+
+ r->ttl = ttl != (uint32_t) -1 ? ttl : CATTA_DEFAULT_TTL;
+
+ return r;
+}
+
+CattaRecord *catta_record_new_full(const char *name, uint16_t class, uint16_t type, uint32_t ttl) {
+ CattaRecord *r;
+ CattaKey *k;
+
+ assert(name);
+
+ if (!(k = catta_key_new(name, class, type))) {
+ catta_log_error("catta_key_new() failed.");
+ return NULL;
+ }
+
+ r = catta_record_new(k, ttl);
+ catta_key_unref(k);
+
+ if (!r) {
+ catta_log_error("catta_record_new() failed.");
+ return NULL;
+ }
+
+ return r;
+}
+
+CattaRecord *catta_record_ref(CattaRecord *r) {
+ assert(r);
+ assert(r->ref >= 1);
+
+ r->ref++;
+ return r;
+}
+
+void catta_record_unref(CattaRecord *r) {
+ assert(r);
+ assert(r->ref >= 1);
+
+ if ((--r->ref) <= 0) {
+ switch (r->key->type) {
+
+ case CATTA_DNS_TYPE_SRV:
+ catta_free(r->data.srv.name);
+ break;
+
+ case CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+ catta_free(r->data.ptr.name);
+ break;
+
+ case CATTA_DNS_TYPE_HINFO:
+ catta_free(r->data.hinfo.cpu);
+ catta_free(r->data.hinfo.os);
+ break;
+
+ case CATTA_DNS_TYPE_TXT:
+ catta_string_list_free(r->data.txt.string_list);
+ break;
+
+ case CATTA_DNS_TYPE_A:
+ case CATTA_DNS_TYPE_AAAA:
+ break;
+
+ default:
+ catta_free(r->data.generic.data);
+ }
+
+ catta_key_unref(r->key);
+ catta_free(r);
+ }
+}
+
+const char *catta_dns_class_to_string(uint16_t class) {
+ if (class & CATTA_DNS_CACHE_FLUSH)
+ return "FLUSH";
+
+ switch (class) {
+ case CATTA_DNS_CLASS_IN:
+ return "IN";
+ case CATTA_DNS_CLASS_ANY:
+ return "ANY";
+ default:
+ return NULL;
+ }
+}
+
+const char *catta_dns_type_to_string(uint16_t type) {
+ switch (type) {
+ case CATTA_DNS_TYPE_CNAME:
+ return "CNAME";
+ case CATTA_DNS_TYPE_A:
+ return "A";
+ case CATTA_DNS_TYPE_AAAA:
+ return "AAAA";
+ case CATTA_DNS_TYPE_PTR:
+ return "PTR";
+ case CATTA_DNS_TYPE_HINFO:
+ return "HINFO";
+ case CATTA_DNS_TYPE_TXT:
+ return "TXT";
+ case CATTA_DNS_TYPE_SRV:
+ return "SRV";
+ case CATTA_DNS_TYPE_ANY:
+ return "ANY";
+ case CATTA_DNS_TYPE_SOA:
+ return "SOA";
+ case CATTA_DNS_TYPE_NS:
+ return "NS";
+ default:
+ return NULL;
+ }
+}
+
+char *catta_key_to_string(const CattaKey *k) {
+ char class[16], type[16];
+ const char *c, *t;
+
+ assert(k);
+ assert(k->ref >= 1);
+
+ /* According to RFC3597 */
+
+ if (!(c = catta_dns_class_to_string(k->clazz))) {
+ snprintf(class, sizeof(class), "CLASS%u", k->clazz);
+ c = class;
+ }
+
+ if (!(t = catta_dns_type_to_string(k->type))) {
+ snprintf(type, sizeof(type), "TYPE%u", k->type);
+ t = type;
+ }
+
+ return catta_strdup_printf("%s\t%s\t%s", k->name, c, t);
+}
+
+char *catta_record_to_string(const CattaRecord *r) {
+ char *p, *s;
+ char buf[1024], *t = NULL, *d = NULL;
+
+ assert(r);
+ assert(r->ref >= 1);
+
+ switch (r->key->type) {
+ case CATTA_DNS_TYPE_A:
+ inet_ntop(AF_INET, (void *)&r->data.a.address.address, t = buf, sizeof(buf));
+ break;
+
+ case CATTA_DNS_TYPE_AAAA:
+ inet_ntop(AF_INET6, (void *)&r->data.aaaa.address.address, t = buf, sizeof(buf));
+ break;
+
+ case CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+
+ t = r->data.ptr.name;
+ break;
+
+ case CATTA_DNS_TYPE_TXT:
+ t = d = catta_string_list_to_string(r->data.txt.string_list);
+ break;
+
+ case CATTA_DNS_TYPE_HINFO:
+
+ snprintf(t = buf, sizeof(buf), "\"%s\" \"%s\"", r->data.hinfo.cpu, r->data.hinfo.os);
+ break;
+
+ case CATTA_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 = catta_key_to_string(r->key);
+ s = catta_strdup_printf("%s %s ; ttl=%u", p, t, r->ttl);
+ catta_free(p);
+ catta_free(d);
+
+ return s;
+}
+
+int catta_key_equal(const CattaKey *a, const CattaKey *b) {
+ assert(a);
+ assert(b);
+
+ if (a == b)
+ return 1;
+
+ return catta_domain_equal(a->name, b->name) &&
+ a->type == b->type &&
+ a->clazz == b->clazz;
+}
+
+int catta_key_pattern_match(const CattaKey *pattern, const CattaKey *k) {
+ assert(pattern);
+ assert(k);
+
+ assert(!catta_key_is_pattern(k));
+
+ if (pattern == k)
+ return 1;
+
+ return catta_domain_equal(pattern->name, k->name) &&
+ (pattern->type == k->type || pattern->type == CATTA_DNS_TYPE_ANY) &&
+ (pattern->clazz == k->clazz || pattern->clazz == CATTA_DNS_CLASS_ANY);
+}
+
+int catta_key_is_pattern(const CattaKey *k) {
+ assert(k);
+
+ return
+ k->type == CATTA_DNS_TYPE_ANY ||
+ k->clazz == CATTA_DNS_CLASS_ANY;
+}
+
+unsigned catta_key_hash(const CattaKey *k) {
+ assert(k);
+
+ return
+ catta_domain_hash(k->name) +
+ k->type +
+ k->clazz;
+}
+
+static int rdata_equal(const CattaRecord *a, const CattaRecord *b) {
+ assert(a);
+ assert(b);
+ assert(a->key->type == b->key->type);
+
+ switch (a->key->type) {
+ case CATTA_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 &&
+ catta_domain_equal(a->data.srv.name, b->data.srv.name);
+
+ case CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+ return catta_domain_equal(a->data.ptr.name, b->data.ptr.name);
+
+ case CATTA_DNS_TYPE_HINFO:
+ return
+ !strcmp(a->data.hinfo.cpu, b->data.hinfo.cpu) &&
+ !strcmp(a->data.hinfo.os, b->data.hinfo.os);
+
+ case CATTA_DNS_TYPE_TXT:
+ return catta_string_list_equal(a->data.txt.string_list, b->data.txt.string_list);
+
+ case CATTA_DNS_TYPE_A:
+ return memcmp(&a->data.a.address, &b->data.a.address, sizeof(CattaIPv4Address)) == 0;
+
+ case CATTA_DNS_TYPE_AAAA:
+ return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(CattaIPv6Address)) == 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 catta_record_equal_no_ttl(const CattaRecord *a, const CattaRecord *b) {
+ assert(a);
+ assert(b);
+
+ if (a == b)
+ return 1;
+
+ return
+ catta_key_equal(a->key, b->key) &&
+ rdata_equal(a, b);
+}
+
+
+CattaRecord *catta_record_copy(CattaRecord *r) {
+ CattaRecord *copy;
+
+ if (!(copy = catta_new(CattaRecord, 1))) {
+ catta_log_error("catta_new() failed.");
+ return NULL;
+ }
+
+ copy->ref = 1;
+ copy->key = catta_key_ref(r->key);
+ copy->ttl = r->ttl;
+
+ switch (r->key->type) {
+ case CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+ if (!(copy->data.ptr.name = catta_strdup(r->data.ptr.name)))
+ goto fail;
+ break;
+
+ case CATTA_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 = catta_strdup(r->data.srv.name)))
+ goto fail;
+ break;
+
+ case CATTA_DNS_TYPE_HINFO:
+ if (!(copy->data.hinfo.os = catta_strdup(r->data.hinfo.os)))
+ goto fail;
+
+ if (!(copy->data.hinfo.cpu = catta_strdup(r->data.hinfo.cpu))) {
+ catta_free(r->data.hinfo.os);
+ goto fail;
+ }
+ break;
+
+ case CATTA_DNS_TYPE_TXT:
+ copy->data.txt.string_list = catta_string_list_copy(r->data.txt.string_list);
+ break;
+
+ case CATTA_DNS_TYPE_A:
+ copy->data.a.address = r->data.a.address;
+ break;
+
+ case CATTA_DNS_TYPE_AAAA:
+ copy->data.aaaa.address = r->data.aaaa.address;
+ break;
+
+ default:
+ if (!(copy->data.generic.data = catta_memdup(r->data.generic.data, r->data.generic.size)))
+ goto fail;
+ copy->data.generic.size = r->data.generic.size;
+ break;
+
+ }
+
+ return copy;
+
+fail:
+ catta_log_error("Failed to allocate memory");
+
+ catta_key_unref(copy->key);
+ catta_free(copy);
+
+ return NULL;
+}
+
+
+size_t catta_key_get_estimate_size(CattaKey *k) {
+ assert(k);
+
+ return strlen(k->name)+1+4;
+}
+
+size_t catta_record_get_estimate_size(CattaRecord *r) {
+ size_t n;
+ assert(r);
+
+ n = catta_key_get_estimate_size(r->key) + 4 + 2;
+
+ switch (r->key->type) {
+ case CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+ n += strlen(r->data.ptr.name) + 1;
+ break;
+
+ case CATTA_DNS_TYPE_SRV:
+ n += 6 + strlen(r->data.srv.name) + 1;
+ break;
+
+ case CATTA_DNS_TYPE_HINFO:
+ n += strlen(r->data.hinfo.os) + 1 + strlen(r->data.hinfo.cpu) + 1;
+ break;
+
+ case CATTA_DNS_TYPE_TXT:
+ n += catta_string_list_serialize(r->data.txt.string_list, NULL, 0);
+ break;
+
+ case CATTA_DNS_TYPE_A:
+ n += sizeof(CattaIPv4Address);
+ break;
+
+ case CATTA_DNS_TYPE_AAAA:
+ n += sizeof(CattaIPv6Address);
+ 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 catta_record_lexicographical_compare(CattaRecord *a, CattaRecord *b) {
+ int r;
+/* char *t1, *t2; */
+
+ assert(a);
+ assert(b);
+
+/* t1 = catta_record_to_string(a); */
+/* t2 = catta_record_to_string(b); */
+/* g_message("lexicocmp: %s %s", t1, t2); */
+/* catta_free(t1); */
+/* catta_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 CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+ return catta_binary_domain_cmp(a->data.ptr.name, b->data.ptr.name);
+
+ case CATTA_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 = catta_binary_domain_cmp(a->data.srv.name, b->data.srv.name);
+
+ return r;
+ }
+
+ case CATTA_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 CATTA_DNS_TYPE_TXT: {
+
+ uint8_t *ma = NULL, *mb = NULL;
+ size_t asize, bsize;
+
+ asize = catta_string_list_serialize(a->data.txt.string_list, NULL, 0);
+ bsize = catta_string_list_serialize(b->data.txt.string_list, NULL, 0);
+
+ if (asize > 0 && !(ma = catta_new(uint8_t, asize)))
+ goto fail;
+
+ if (bsize > 0 && !(mb = catta_new(uint8_t, bsize))) {
+ catta_free(ma);
+ goto fail;
+ }
+
+ catta_string_list_serialize(a->data.txt.string_list, ma, asize);
+ catta_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;
+
+ catta_free(ma);
+ catta_free(mb);
+
+ return r;
+ }
+
+ case CATTA_DNS_TYPE_A:
+ return memcmp(&a->data.a.address, &b->data.a.address, sizeof(CattaIPv4Address));
+
+ case CATTA_DNS_TYPE_AAAA:
+ return memcmp(&a->data.aaaa.address, &b->data.aaaa.address, sizeof(CattaIPv6Address));
+
+ default:
+ return lexicographical_memcmp(a->data.generic.data, a->data.generic.size,
+ b->data.generic.data, b->data.generic.size);
+ }
+
+
+fail:
+ catta_log_error(__FILE__": Out of memory");
+ return -1; /* or whatever ... */
+}
+
+int catta_record_is_goodbye(CattaRecord *r) {
+ assert(r);
+
+ return r->ttl == 0;
+}
+
+int catta_key_is_valid(CattaKey *k) {
+ assert(k);
+
+ if (!catta_is_valid_domain_name(k->name))
+ return 0;
+
+ return 1;
+}
+
+int catta_record_is_valid(CattaRecord *r) {
+ assert(r);
+
+ if (!catta_key_is_valid(r->key))
+ return 0;
+
+ switch (r->key->type) {
+
+ case CATTA_DNS_TYPE_PTR:
+ case CATTA_DNS_TYPE_CNAME:
+ case CATTA_DNS_TYPE_NS:
+ return catta_is_valid_domain_name(r->data.ptr.name);
+
+ case CATTA_DNS_TYPE_SRV:
+ return catta_is_valid_domain_name(r->data.srv.name);
+
+ case CATTA_DNS_TYPE_HINFO:
+ return
+ strlen(r->data.hinfo.os) <= 255 &&
+ strlen(r->data.hinfo.cpu) <= 255;
+
+ case CATTA_DNS_TYPE_TXT: {
+
+ CattaStringList *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 CattaAddress *get_address(const CattaRecord *r, CattaAddress *a) {
+ assert(r);
+
+ switch (r->key->type) {
+ case CATTA_DNS_TYPE_A:
+ a->proto = CATTA_PROTO_INET;
+ a->data.ipv4 = r->data.a.address;
+ break;
+
+ case CATTA_DNS_TYPE_AAAA:
+ a->proto = CATTA_PROTO_INET6;
+ a->data.ipv6 = r->data.aaaa.address;
+ break;
+
+ default:
+ return NULL;
+ }
+
+ return a;
+}
+
+int catta_record_is_link_local_address(const CattaRecord *r) {
+ CattaAddress a;
+
+ assert(r);
+
+ if (!get_address(r, &a))
+ return 0;
+
+ return catta_address_is_link_local(&a);
+}
projects / catta / blobdiff