#include <math.h>
-#include "strv.h"
-
+#include "alloc-util.h"
#include "dns-domain.h"
-#include "resolved-dns-rr.h"
-#include "resolved-dns-packet.h"
#include "dns-type.h"
+#include "hexdecoct.h"
+#include "resolved-dns-packet.h"
+#include "resolved-dns-rr.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {
DnsResourceKey *k;
return k;
}
+DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) {
+ int r;
+
+ assert(key);
+ assert(cname);
+
+ assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME));
+
+ if (cname->key->type == DNS_TYPE_CNAME)
+ return dns_resource_key_new(key->class, key->type, cname->cname.name);
+ else {
+ DnsResourceKey *k;
+ char *destination = NULL;
+
+ r = dns_name_change_suffix(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname->key), cname->dname.name, &destination);
+ if (r < 0)
+ return NULL;
+ if (r == 0)
+ return dns_resource_key_ref((DnsResourceKey*) key);
+
+ k = dns_resource_key_new_consume(key->class, key->type, destination);
+ if (!k) {
+ free(destination);
+ return NULL;
+ }
+
+ return k;
+ }
+}
+
+int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) {
+ DnsResourceKey *new_key;
+ char *joined;
+ int r;
+
+ assert(ret);
+ assert(key);
+ assert(name);
+
+ if (dns_name_is_root(name)) {
+ *ret = dns_resource_key_ref(key);
+ return 0;
+ }
+
+ r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined);
+ if (r < 0)
+ return r;
+
+ new_key = dns_resource_key_new_consume(key->class, key->type, joined);
+ if (!new_key) {
+ free(joined);
+ return -ENOMEM;
+ }
+
+ *ret = new_key;
+ return 0;
+}
+
DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
DnsResourceKey *k;
if (!k)
return NULL;
+ /* Static/const keys created with DNS_RESOURCE_KEY_CONST will
+ * set this to -1, they should not be reffed/unreffed */
+ assert(k->n_ref != (unsigned) -1);
+
assert(k->n_ref > 0);
k->n_ref++;
if (!k)
return NULL;
+ assert(k->n_ref != (unsigned) -1);
assert(k->n_ref > 0);
if (k->n_ref == 1) {
return 1;
}
-int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) {
+int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr, const char *search_domain) {
+ int r;
+
assert(key);
assert(rr);
+ /* Checks if an rr matches the specified key. If a search
+ * domain is specified, it will also be checked if the key
+ * with the search domain suffixed might match the 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));
+ r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
+ if (r != 0)
+ return r;
+
+ if (search_domain) {
+ _cleanup_free_ char *joined = NULL;
+
+ r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined);
+ if (r < 0)
+ return r;
+
+ return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined);
+ }
+
+ return 0;
}
-int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) {
+int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr, const char *search_domain) {
+ int r;
+
assert(key);
assert(rr);
if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
return 0;
- if (rr->key->type != DNS_TYPE_CNAME)
+ if (rr->key->type == DNS_TYPE_CNAME)
+ r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(rr->key));
+ else if (rr->key->type == DNS_TYPE_DNAME)
+ r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(rr->key));
+ else
return 0;
- return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key));
+ if (r != 0)
+ return r;
+
+ if (search_domain) {
+ _cleanup_free_ char *joined = NULL;
+
+ r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined);
+ if (r < 0)
+ return r;
+
+ if (rr->key->type == DNS_TYPE_CNAME)
+ return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(rr->key));
+ else if (rr->key->type == DNS_TYPE_DNAME)
+ return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(rr->key));
+ }
+
+ return 0;
+
}
-static unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) {
+static void dns_resource_key_hash_func(const void *i, struct siphash *state) {
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;
+ assert(k);
- return ul;
+ dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state);
+ siphash24_compress(&k->class, sizeof(k->class), state);
+ siphash24_compress(&k->type, sizeof(k->type), state);
}
static int dns_resource_key_compare_func(const void *a, const void *b) {
};
int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) {
- char cbuf[DECIMAL_STR_MAX(uint16_t)], tbuf[DECIMAL_STR_MAX(uint16_t)];
+ char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + 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);
+ sprintf(cbuf, "CLASS%u", key->class);
c = cbuf;
}
t = dns_type_to_string(key->type);
if (!t){
- sprintf(tbuf, "%i", key->type);
+ sprintf(tbuf, "TYPE%u", key->type);
t = tbuf;
}
case DNS_TYPE_TXT:
case DNS_TYPE_SPF:
- strv_free(rr->txt.strings);
+ dns_txt_item_free_all(rr->txt.items);
break;
case DNS_TYPE_SOA:
free(rr->mx.exchange);
break;
+ case DNS_TYPE_DS:
+ free(rr->ds.digest);
+ break;
+
case DNS_TYPE_SSHFP:
- free(rr->sshfp.key);
+ free(rr->sshfp.fingerprint);
break;
case DNS_TYPE_DNSKEY:
free(rr->rrsig.signature);
break;
+ case DNS_TYPE_NSEC:
+ free(rr->nsec.next_domain_name);
+ bitmap_free(rr->nsec.types);
+ break;
+
+ case DNS_TYPE_NSEC3:
+ free(rr->nsec3.next_hashed_name);
+ free(rr->nsec3.salt);
+ bitmap_free(rr->nsec3.types);
+ break;
+
case DNS_TYPE_LOC:
case DNS_TYPE_A:
case DNS_TYPE_AAAA:
free(rr->generic.data);
}
+ free(rr->wire_format);
dns_resource_key_unref(rr->key);
}
return 0;
}
+int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) {
+ DnsResourceRecord *rr;
+
+ assert(ret);
+ assert(address);
+ assert(family);
+
+ if (family == AF_INET) {
+
+ rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name);
+ if (!rr)
+ return -ENOMEM;
+
+ rr->a.in_addr = address->in;
+
+ } else if (family == AF_INET6) {
+
+ rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name);
+ if (!rr)
+ return -ENOMEM;
+
+ rr->aaaa.in6_addr = address->in6;
+ } else
+ return -EAFNOSUPPORT;
+
+ *ret = rr;
+
+ return 0;
+}
+
int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
int r;
case DNS_TYPE_SPF: /* exactly the same as TXT */
case DNS_TYPE_TXT:
- return strv_equal(a->txt.strings, b->txt.strings);
+ return dns_txt_item_equal(a->txt.items, b->txt.items);
case DNS_TYPE_A:
return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
a->loc.longitude == b->loc.longitude &&
a->loc.altitude == b->loc.altitude;
+ case DNS_TYPE_DS:
+ return a->ds.key_tag == b->ds.key_tag &&
+ a->ds.algorithm == b->ds.algorithm &&
+ a->ds.digest_type == b->ds.digest_type &&
+ a->ds.digest_size == b->ds.digest_size &&
+ memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0;
+
case DNS_TYPE_SSHFP:
return a->sshfp.algorithm == b->sshfp.algorithm &&
a->sshfp.fptype == b->sshfp.fptype &&
- a->sshfp.key_size == b->sshfp.key_size &&
- memcmp(a->sshfp.key, b->sshfp.key, a->sshfp.key_size) == 0;
+ a->sshfp.fingerprint_size == b->sshfp.fingerprint_size &&
+ memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0;
case DNS_TYPE_DNSKEY:
- return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag &&
- a->dnskey.sep_flag == b->dnskey.sep_flag &&
+ return a->dnskey.flags == b->dnskey.flags &&
+ a->dnskey.protocol == b->dnskey.protocol &&
a->dnskey.algorithm == b->dnskey.algorithm &&
a->dnskey.key_size == b->dnskey.key_size &&
memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0;
return dns_name_equal(a->rrsig.signer, b->rrsig.signer);
+ case DNS_TYPE_NSEC:
+ return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) &&
+ bitmap_equal(a->nsec.types, b->nsec.types);
+
+ case DNS_TYPE_NSEC3:
+ return a->nsec3.algorithm == b->nsec3.algorithm &&
+ a->nsec3.flags == b->nsec3.flags &&
+ a->nsec3.iterations == b->nsec3.iterations &&
+ a->nsec3.salt_size == b->nsec3.salt_size &&
+ memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 &&
+ memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 &&
+ bitmap_equal(a->nsec3.types, b->nsec3.types);
+
default:
return a->generic.size == b->generic.size &&
memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
return 0;
}
+static char *format_types(Bitmap *types) {
+ _cleanup_strv_free_ char **strv = NULL;
+ _cleanup_free_ char *str = NULL;
+ Iterator i;
+ unsigned type;
+ int r;
+
+ BITMAP_FOREACH(type, types, i) {
+ if (dns_type_to_string(type)) {
+ r = strv_extend(&strv, dns_type_to_string(type));
+ if (r < 0)
+ return NULL;
+ } else {
+ char *t;
+
+ r = asprintf(&t, "TYPE%u", type);
+ if (r < 0)
+ return NULL;
+
+ r = strv_consume(&strv, t);
+ if (r < 0)
+ return NULL;
+ }
+ }
+
+ str = strv_join(strv, " ");
+ if (!str)
+ return NULL;
+
+ return strjoin("( ", str, " )", NULL);
+}
+
+static char *format_txt(DnsTxtItem *first) {
+ DnsTxtItem *i;
+ size_t c = 1;
+ char *p, *s;
+
+ LIST_FOREACH(items, i, first)
+ c += i->length * 4 + 3;
+
+ p = s = new(char, c);
+ if (!s)
+ return NULL;
+
+ LIST_FOREACH(items, i, first) {
+ size_t j;
+
+ if (i != first)
+ *(p++) = ' ';
+
+ *(p++) = '"';
+
+ for (j = 0; j < i->length; j++) {
+ if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) {
+ *(p++) = '\\';
+ *(p++) = '0' + (i->data[j] / 100);
+ *(p++) = '0' + ((i->data[j] / 10) % 10);
+ *(p++) = '0' + (i->data[j] % 10);
+ } else
+ *(p++) = i->data[j];
+ }
+
+ *(p++) = '"';
+ }
+
+ *p = 0;
+ return s;
+}
+
int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
_cleanup_free_ char *k = NULL, *t = NULL;
char *s;
case DNS_TYPE_SPF: /* exactly the same as TXT */
case DNS_TYPE_TXT:
- t = strv_join_quoted(rr->txt.strings);
+ t = format_txt(rr->txt.items);
if (!t)
return -ENOMEM;
s = strjoin(k, " ", t, NULL);
if (!s)
return -ENOMEM;
-
break;
case DNS_TYPE_A: {
return -ENOMEM;
break;
+ case DNS_TYPE_DS:
+ t = hexmem(rr->ds.digest, rr->ds.digest_size);
+ if (!t)
+ return -ENOMEM;
+
+ r = asprintf(&s, "%s %u %u %u %s",
+ k,
+ rr->ds.key_tag,
+ rr->ds.algorithm,
+ rr->ds.digest_type,
+ t);
+ if (r < 0)
+ return -ENOMEM;
+ break;
+
case DNS_TYPE_SSHFP:
- t = hexmem(rr->sshfp.key, rr->sshfp.key_size);
+ t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size);
if (!t)
return -ENOMEM;
if (!t)
return -ENOMEM;
- r = asprintf(&s, "%s %u 3 %.*s%.*u %s",
+ r = asprintf(&s, "%s %u %u %.*s%.*u %s",
k,
- dnskey_to_flags(rr),
+ rr->dnskey.flags,
+ rr->dnskey.protocol,
alg ? -1 : 0, alg,
alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm,
t);
break;
}
+ case DNS_TYPE_NSEC:
+ t = format_types(rr->nsec.types);
+ if (!t)
+ return -ENOMEM;
+
+ r = asprintf(&s, "%s %s %s",
+ k,
+ rr->nsec.next_domain_name,
+ t);
+ if (r < 0)
+ return -ENOMEM;
+ break;
+
+ case DNS_TYPE_NSEC3: {
+ _cleanup_free_ char *salt = NULL, *hash = NULL;
+
+ if (rr->nsec3.salt_size > 0) {
+ salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size);
+ if (!salt)
+ return -ENOMEM;
+ }
+
+ hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false);
+ if (!hash)
+ return -ENOMEM;
+
+ t = format_types(rr->nsec3.types);
+ if (!t)
+ return -ENOMEM;
+
+ r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s",
+ k,
+ rr->nsec3.algorithm,
+ rr->nsec3.flags,
+ rr->nsec3.iterations,
+ rr->nsec3.salt_size > 0 ? salt : "-",
+ hash,
+ t);
+ if (r < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
default:
t = hexmem(rr->generic.data, rr->generic.size);
if (!t)
return -ENOMEM;
- s = strjoin(k, " ", t, NULL);
- if (!s)
+ r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t);
+ if (r < 0)
return -ENOMEM;
break;
}
return 0;
}
+int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) {
+
+ DnsPacket packet = {
+ .n_ref = 1,
+ .protocol = DNS_PROTOCOL_DNS,
+ .on_stack = true,
+ .refuse_compression = true,
+ .canonical_form = canonical,
+ };
+
+ size_t start, rds;
+ int r;
+
+ assert(rr);
+
+ /* Generates the RR in wire-format, optionally in the
+ * canonical form as discussed in the DNSSEC RFC 4034, Section
+ * 6.2. We allocate a throw-away DnsPacket object on the stack
+ * here, because we need some book-keeping for memory
+ * management, and can reuse the DnsPacket serializer, that
+ * can generate the canonical form, too, but also knows label
+ * compression and suchlike. */
+
+ if (rr->wire_format && rr->wire_format_canonical == canonical)
+ return 0;
+
+ r = dns_packet_append_rr(&packet, rr, &start, &rds);
+ if (r < 0)
+ return r;
+
+ assert(start == 0);
+ assert(packet._data);
+
+ free(rr->wire_format);
+ rr->wire_format = packet._data;
+ rr->wire_format_size = packet.size;
+ rr->wire_format_rdata_offset = rds;
+ rr->wire_format_canonical = canonical;
+
+ packet._data = NULL;
+ dns_packet_unref(&packet);
+
+ return 0;
+}
+
const char *dns_class_to_string(uint16_t class) {
switch (class) {
if (strcaseeq(s, "IN"))
*class = DNS_CLASS_IN;
else if (strcaseeq(s, "ANY"))
- *class = DNS_TYPE_ANY;
+ *class = DNS_CLASS_ANY;
else
return -EINVAL;
return 0;
}
+
+DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) {
+ DnsTxtItem *n;
+
+ if (!i)
+ return NULL;
+
+ n = i->items_next;
+
+ free(i);
+ return dns_txt_item_free_all(n);
+}
+
+bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) {
+
+ if (!a != !b)
+ return false;
+
+ if (!a)
+ return true;
+
+ if (a->length != b->length)
+ return false;
+
+ if (memcmp(a->data, b->data, a->length) != 0)
+ return false;
+
+ return dns_txt_item_equal(a->items_next, b->items_next);
+}
+
+static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = {
+ [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5",
+ [DNSSEC_ALGORITHM_DH] = "DH",
+ [DNSSEC_ALGORITHM_DSA] = "DSA",
+ [DNSSEC_ALGORITHM_ECC] = "ECC",
+ [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1",
+ [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1",
+ [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1",
+ [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256",
+ [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512",
+ [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT",
+ [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS",
+ [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID",
+};
+DEFINE_STRING_TABLE_LOOKUP(dnssec_algorithm, int);
+
+static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = {
+ [DNSSEC_DIGEST_SHA1] = "SHA1",
+ [DNSSEC_DIGEST_SHA256] = "SHA256",
+};
+DEFINE_STRING_TABLE_LOOKUP(dnssec_digest, int);
projects / thirdparty / systemd.git / blobdiff