along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include "resolved-dns-domain.h"
#include "resolved-dns-rr.h"
-void dns_resource_key_free(DnsResourceKey *key) {
- if (!key)
- return;
+DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {
+ DnsResourceKey *k;
+ size_t l;
+
+ assert(name);
+
+ l = strlen(name);
+ k = malloc0(sizeof(DnsResourceKey) + l + 1);
+ if (!k)
+ return NULL;
+
+ k->n_ref = 1;
+ k->class = class;
+ k->type = type;
+
+ strcpy((char*) k + sizeof(DnsResourceKey), name);
+
+ return k;
+}
+
+DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
+ DnsResourceKey *k;
- free(key->name);
- zero(*key);
+ assert(name);
+
+ k = new0(DnsResourceKey, 1);
+ if (!k)
+ return NULL;
+
+ k->n_ref = 1;
+ k->class = class;
+ k->type = type;
+ k->_name = name;
+
+ return k;
}
-DnsResourceRecord* dns_resource_record_new(void) {
+DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {
+
+ if (!k)
+ return NULL;
+
+ assert(k->n_ref > 0);
+ k->n_ref++;
+
+ return k;
+}
+
+DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {
+ if (!k)
+ return NULL;
+
+ assert(k->n_ref > 0);
+
+ if (k->n_ref == 1) {
+ free(k->_name);
+ free(k);
+ } else
+ k->n_ref--;
+
+ return NULL;
+}
+
+int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {
+ int r;
+
+ r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));
+ if (r <= 0)
+ return r;
+
+ if (a->class != b->class)
+ return 0;
+
+ if (a->type != b->type)
+ return 0;
+
+ return 1;
+}
+
+int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) {
+ assert(key);
+ assert(rr);
+
+ if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
+ return 0;
+
+ if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)
+ return 0;
+
+ return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
+}
+
+int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) {
+ assert(key);
+ assert(rr);
+
+ if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
+ return 0;
+
+ if (rr->key->type != DNS_TYPE_CNAME)
+ return 0;
+
+ return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
+}
+
+unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) {
+ const DnsResourceKey *k = i;
+ unsigned long ul;
+
+ ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key);
+ ul = ul * hash_key[0] + ul + k->class;
+ ul = ul * hash_key[1] + ul + k->type;
+
+ return ul;
+}
+
+int dns_resource_key_compare_func(const void *a, const void *b) {
+ const DnsResourceKey *x = a, *y = b;
+ int ret;
+
+ ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y));
+ if (ret != 0)
+ return ret;
+
+ if (x->type < y->type)
+ return -1;
+ if (x->type > y->type)
+ return 1;
+
+ if (x->class < y->class)
+ return -1;
+ if (x->class > y->class)
+ return 1;
+
+ return 0;
+}
+
+int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) {
+ char cbuf[DECIMAL_STR_MAX(uint16_t)], tbuf[DECIMAL_STR_MAX(uint16_t)];
+ const char *c, *t;
+ char *s;
+
+ c = dns_class_to_string(key->class);
+ if (!c) {
+ sprintf(cbuf, "%i", key->class);
+ c = cbuf;
+ }
+
+ t = dns_type_to_string(key->type);
+ if (!t){
+ sprintf(tbuf, "%i", key->type);
+ t = tbuf;
+ }
+
+ s = strjoin(DNS_RESOURCE_KEY_NAME(key), " ", c, " ", t, NULL);
+ if (!s)
+ return -ENOMEM;
+
+ *ret = s;
+ return 0;
+}
+
+DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {
DnsResourceRecord *rr;
rr = new0(DnsResourceRecord, 1);
return NULL;
rr->n_ref = 1;
+ rr->key = dns_resource_key_ref(key);
+
return rr;
}
+DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) {
+ _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
+
+ key = dns_resource_key_new(class, type, name);
+ if (!key)
+ return NULL;
+
+ return dns_resource_record_new(key);
+}
+
DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {
if (!rr)
return NULL;
return NULL;
}
- if (IN_SET(rr->key.type, DNS_TYPE_PTR, DNS_TYPE_NS, DNS_TYPE_CNAME))
- free(rr->ptr.name);
- else if (rr->key.type == DNS_TYPE_HINFO) {
- free(rr->hinfo.cpu);
- free(rr->hinfo.os);
- } else if (!IN_SET(rr->key.type, DNS_TYPE_A, DNS_TYPE_AAAA))
- free(rr->generic.data);
+ if (rr->key) {
+ if (IN_SET(rr->key->type, DNS_TYPE_PTR, DNS_TYPE_NS, DNS_TYPE_CNAME))
+ free(rr->ptr.name);
+ else if (rr->key->type == DNS_TYPE_HINFO) {
+ free(rr->hinfo.cpu);
+ free(rr->hinfo.os);
+ } else if (rr->key->type == DNS_TYPE_SOA) {
+ free(rr->soa.mname);
+ free(rr->soa.rname);
+ } else if (!IN_SET(rr->key->type, DNS_TYPE_A, DNS_TYPE_AAAA))
+ free(rr->generic.data);
+
+ dns_resource_key_unref(rr->key);
+ }
- dns_resource_key_free(&rr->key);
free(rr);
return NULL;
}
+
+int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {
+ _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
+ _cleanup_free_ char *ptr = NULL;
+ int r;
+
+ assert(ret);
+ assert(address);
+ assert(hostname);
+
+ r = dns_name_reverse(family, address, &ptr);
+ if (r < 0)
+ return r;
+
+ key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);
+ if (!key)
+ return -ENOMEM;
+
+ ptr = NULL;
+
+ rr = dns_resource_record_new(key);
+ if (!rr)
+ return -ENOMEM;
+
+ rr->ptr.name = strdup(hostname);
+ if (!rr->ptr.name)
+ return -ENOMEM;
+
+ *ret = rr;
+ rr = NULL;
+
+ return 0;
+}
+
+int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
+ int r;
+
+ assert(a);
+ assert(b);
+
+ r = dns_resource_key_equal(a->key, b->key);
+ if (r <= 0)
+ return r;
+
+ switch (a->key->type) {
+
+ case DNS_TYPE_PTR:
+ case DNS_TYPE_NS:
+ case DNS_TYPE_CNAME:
+ return dns_name_equal(a->ptr.name, b->ptr.name);
+
+ case DNS_TYPE_HINFO:
+ return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) &&
+ strcaseeq(a->hinfo.os, b->hinfo.os);
+
+ case DNS_TYPE_A:
+ return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
+
+ case DNS_TYPE_AAAA:
+ return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
+
+ case DNS_TYPE_SOA:
+ r = dns_name_equal(a->soa.mname, b->soa.mname);
+ if (r <= 0)
+ return r;
+ r = dns_name_equal(a->soa.rname, b->soa.rname);
+ if (r <= 0)
+ return r;
+
+ return a->soa.serial == b->soa.serial &&
+ a->soa.refresh == b->soa.refresh &&
+ a->soa.retry == b->soa.retry &&
+ a->soa.expire == b->soa.expire &&
+ a->soa.minimum == b->soa.minimum;
+ default:
+ return a->generic.size == b->generic.size &&
+ memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
+ }
+}
+
+int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
+ _cleanup_free_ char *k = NULL;
+ char *s;
+ int r;
+
+ assert(rr);
+
+ r = dns_resource_key_to_string(rr->key, &k);
+ if (r < 0)
+ return r;
+
+ switch (rr->key->type) {
+
+ case DNS_TYPE_PTR:
+ case DNS_TYPE_NS:
+ case DNS_TYPE_CNAME:
+ s = strjoin(k, " ", rr->ptr.name, NULL);
+ if (!s)
+ return -ENOMEM;
+
+ break;
+
+ case DNS_TYPE_HINFO:
+ s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL);
+ if (!s)
+ return -ENOMEM;
+ break;
+
+ case DNS_TYPE_A: {
+ _cleanup_free_ char *x = NULL;
+
+ r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x);
+ if (r < 0)
+ return r;
+
+ s = strjoin(k, " ", x, NULL);
+ if (!s)
+ return -ENOMEM;
+ break;
+ }
+
+ case DNS_TYPE_AAAA: {
+ _cleanup_free_ char *x = NULL;
+
+ r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &x);
+ if (r < 0)
+ return r;
+
+ s = strjoin(k, " ", x, NULL);
+ if (!s)
+ return -ENOMEM;
+ break;
+ }
+
+ case DNS_TYPE_SOA:
+ r = asprintf(&s, "%s %s %s %u %u %u %u %u",
+ k,
+ strna(rr->soa.mname),
+ strna(rr->soa.rname),
+ rr->soa.serial,
+ rr->soa.refresh,
+ rr->soa.retry,
+ rr->soa.expire,
+ rr->soa.minimum);
+ if (r < 0)
+ return -ENOMEM;
+ break;
+
+ default: {
+ _cleanup_free_ char *x = NULL;
+
+ x = hexmem(rr->generic.data, rr->generic.size);
+ if (!x)
+ return -ENOMEM;
+
+ s = strjoin(k, " ", x, NULL);
+ if (!s)
+ return -ENOMEM;
+ break;
+ }}
+
+ *ret = s;
+ return 0;
+}
+
+const char *dns_class_to_string(uint16_t class) {
+
+ switch (class) {
+
+ case DNS_CLASS_IN:
+ return "IN";
+
+ case DNS_CLASS_ANY:
+ return "ANY";
+ }
+
+ return NULL;
+}
+
+int dns_class_from_string(const char *s, uint16_t *class) {
+ assert(s);
+ assert(class);
+
+ if (strcaseeq(s, "IN"))
+ *class = DNS_CLASS_IN;
+ else if (strcaseeq(s, "ANY"))
+ *class = DNS_TYPE_ANY;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct {
+ uint16_t type;
+ const char *name;
+} dns_types[] = {
+ { DNS_TYPE_A, "A" },
+ { DNS_TYPE_NS, "NS" },
+ { DNS_TYPE_CNAME, "CNAME" },
+ { DNS_TYPE_SOA, "SOA" },
+ { DNS_TYPE_PTR, "PTR" },
+ { DNS_TYPE_HINFO, "HINFO" },
+ { DNS_TYPE_MX, "MX" },
+ { DNS_TYPE_TXT, "TXT" },
+ { DNS_TYPE_AAAA, "AAAA" },
+ { DNS_TYPE_SRV, "SRV" },
+ { DNS_TYPE_SSHFP, "SSHFP" },
+ { DNS_TYPE_DNAME, "DNAME" },
+ { DNS_TYPE_ANY, "ANY" },
+ { DNS_TYPE_OPT, "OPT" },
+ { DNS_TYPE_TKEY, "TKEY" },
+ { DNS_TYPE_TSIG, "TSIG" },
+ { DNS_TYPE_IXFR, "IXFR" },
+ { DNS_TYPE_AXFR, "AXFR" },
+};
+
+
+const char *dns_type_to_string(uint16_t type) {
+ unsigned i;
+
+ for (i = 0; i < ELEMENTSOF(dns_types); i++)
+ if (dns_types[i].type == type)
+ return dns_types[i].name;
+
+ return NULL;
+}
+
+int dns_type_from_string(const char *s, uint16_t *type) {
+ unsigned i;
+
+ assert(s);
+ assert(type);
+
+ for (i = 0; i < ELEMENTSOF(dns_types); i++)
+ if (strcaseeq(dns_types[i].name, s)) {
+ *type = dns_types[i].type;
+ return 0;
+ }
+
+ return -EINVAL;
+}
projects / thirdparty / systemd.git / blobdiff