resolved: add basic DNSSEC support

[thirdparty/systemd.git] / src / shared / dns-domain.h

diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h
index 84be17425b3431f970d7ad9c761f1e992aeb5d2c..e48d8c6b9d38eb3a8972bb4febceedd95e76e1f1 100644 (file)
--- a/src/shared/dns-domain.h
+++ b/src/shared/dns-domain.h
@@ -25,12 +25,22 @@
 #include "hashmap.h"
 #include "in-addr-util.h"
 
+/* Length of a single label, with all escaping removed, excluding any trailing dot or NUL byte */
 #define DNS_LABEL_MAX 63
-#define DNS_NAME_MAX 255
+
+/* Worst case length of a single label, with all escaping applied and room for a trailing NUL byte. */
+#define DNS_LABEL_ESCAPED_MAX (DNS_LABEL_MAX*4+1)
+
+/* Maximum length of a full hostname, consisting of a series of unescaped labels, and no trailing dot or NUL byte */
+#define DNS_HOSTNAME_MAX 253
+
+/* Maximum length of a full hostname, on the wire, including the final NUL byte */
+#define DNS_WIRE_FOMAT_HOSTNAME_MAX 255
 
 int dns_label_unescape(const char **name, char *dest, size_t sz);
 int dns_label_unescape_suffix(const char *name, const char **label_end, char *dest, size_t sz);
-int dns_label_escape(const char *p, size_t l, char **ret);
+int dns_label_escape(const char *p, size_t l, char *dest, size_t sz);
+int dns_label_escape_new(const char *p, size_t l, char **ret);
 
 int dns_label_apply_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max);
 int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max);
@@ -70,10 +80,9 @@ int dns_name_address(const char *p, int *family, union in_addr_union *a);
 bool dns_name_is_root(const char *name);
 bool dns_name_is_single_label(const char *name);
 
-int dns_name_to_wire_format(const char *domain, uint8_t *buffer, size_t len);
-
-int dns_srv_type_verify(const char *name);
+int dns_name_to_wire_format(const char *domain, uint8_t *buffer, size_t len, bool canonical);
 
+bool dns_srv_type_is_valid(const char *name);
 bool dns_service_name_is_valid(const char *name);
 
 int dns_service_join(const char *name, const char *type, const char *domain, char **ret);