resolved: TLSA records

[thirdparty/systemd.git] / src / resolve / resolved-dns-rr.h

diff --git a/src/resolve/resolved-dns-rr.h b/src/resolve/resolved-dns-rr.h
index 90c362916627db6afb22f86496d87b3aa033fd4f..d42d38cfea781e0ea165de9700b64f75623d7b9e 100644 (file)
--- a/src/resolve/resolved-dns-rr.h
+++ b/src/resolve/resolved-dns-rr.h
@@ -34,8 +34,9 @@ typedef struct DnsResourceRecord DnsResourceRecord;
 typedef struct DnsTxtItem DnsTxtItem;
 
 /* DNSKEY RR flags */
-#define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8)
 #define DNSKEY_FLAG_SEP      (UINT16_C(1) << 0)
+#define DNSKEY_FLAG_REVOKE   (UINT16_C(1) << 7)
+#define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8)
 
 /* mDNS RR flags */
 #define MDNS_RR_CACHE_FLUSH  (UINT16_C(1) << 15)
@@ -80,7 +81,7 @@ enum {
 };
 
 struct DnsResourceKey {
-        unsigned n_ref;
+        unsigned n_ref; /* (unsigned -1) for const keys, see below */
         uint16_t class, type;
         char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */
 };
@@ -107,14 +108,24 @@ struct DnsTxtItem {
 struct DnsResourceRecord {
         unsigned n_ref;
         DnsResourceKey *key;
+
         char *to_string;
+
         uint32_t ttl;
         usec_t expiry; /* RRSIG signature expiry */
+
+        /* How many labels to strip to determine "signer" of the RRSIG (aka, the zone). -1 if not signed. */
+        unsigned n_skip_labels_signer;
+        /* How many labels to strip to determine "synthesizing source" of this RR, i.e. the wildcard's immediate parent. -1 if not signed. */
+        unsigned n_skip_labels_source;
+
         bool unparseable:1;
+
         bool wire_format_canonical:1;
         void *wire_format;
         size_t wire_format_size;
         size_t wire_format_rdata_offset;
+
         union {
                 struct {
                         void *data;
@@ -231,11 +242,20 @@ struct DnsResourceRecord {
                         size_t next_hashed_name_size;
                         Bitmap *types;
                 } nsec3;
+
+                /* https://tools.ietf.org/html/draft-ietf-dane-protocol-23 */
+                struct {
+                        uint8_t cert_usage;
+                        uint8_t selector;
+                        uint8_t matching_type;
+                        void *data;
+                        size_t data_size;
+                } tlsa;
         };
 };
 
 static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
-        if (_unlikely_(!key))
+        if (!key)
                 return NULL;
 
         if (key->_name)
@@ -244,6 +264,27 @@ static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
         return (char*) key + sizeof(DnsResourceKey);
 }
 
+static inline const void* DNS_RESOURCE_RECORD_RDATA(DnsResourceRecord *rr) {
+        if (!rr)
+                return NULL;
+
+        if (!rr->wire_format)
+                return NULL;
+
+        assert(rr->wire_format_rdata_offset <= rr->wire_format_size);
+        return (uint8_t*) rr->wire_format + rr->wire_format_rdata_offset;
+}
+
+static inline size_t DNS_RESOURCE_RECORD_RDATA_SIZE(DnsResourceRecord *rr) {
+        if (!rr)
+                return 0;
+        if (!rr->wire_format)
+                return 0;
+
+        assert(rr->wire_format_rdata_offset <= rr->wire_format_size);
+        return rr->wire_format_size - rr->wire_format_rdata_offset;
+}
+
 DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
 DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname);
 int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name);
@@ -262,6 +303,8 @@ static inline bool dns_key_is_shared(const DnsResourceKey *key) {
         return IN_SET(key->type, DNS_TYPE_PTR);
 }
 
+bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b);
+
 DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
 DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
 DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
@@ -274,10 +317,16 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref);
 
 int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical);
 
+int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret);
+int dns_resource_record_source(DnsResourceRecord *rr, const char **ret);
+int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone);
+int dns_resource_record_is_synthetic(DnsResourceRecord *rr);
+
 DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i);
 bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b);
 
 extern const struct hash_ops dns_resource_key_hash_ops;
+extern const struct hash_ops dns_resource_record_hash_ops;
 
 int dnssec_algorithm_to_string_alloc(int i, char **ret);
 int dnssec_algorithm_from_string(const char *s) _pure_;