X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=include%2Fcatta%2Fdomain.h;fp=include%2Fcatta%2Fdomain.h;h=dbcbd96902c275439bb211fa0ca0cad604f8f1f0;hb=f1de9dcaab953757252d51b4725cbfa36daa10a5;hp=0000000000000000000000000000000000000000;hpb=7a5b2f69af7d36d6cd4153142f125fa011784e03;p=catta

diff --git a/include/catta/domain.h b/include/catta/domain.h
new file mode 100644
index 0000000..dbcbd96
--- /dev/null
+++ b/include/catta/domain.h
@@ -0,0 +1,129 @@
+#ifndef foodomainhfoo
+#define foodomainhfoo
+
+/***
+  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.
+***/
+
+/** \file domain.h Domain name handling functions */
+
+#include <inttypes.h>
+#include <sys/types.h>
+
+#include <catta/cdecl.h>
+
+CATTA_C_DECL_BEGIN
+
+/** The maximum length of a a fully escaped domain name C string. This
+ * is calculated like this: RFC1034 mandates maximum length of FQDNs
+ * is 255. The maximum label length is 63. To minimize the number of
+ * (non-escaped) dots, we comprise our maximum-length domain name of
+ * four labels á 63 characters plus three inner dots. Escaping the
+ * four labels quadruples their length at maximum. An escaped domain
+ * name has the therefore the maximum length of 63*4*4+3=1011. A
+ * trailing NUL and perhaps two unnecessary dots leading and trailing
+ * the string brings us to 1014. */
+#define CATTA_DOMAIN_NAME_MAX 1014
+
+/** Maximum size of an unescaped label */
+#define CATTA_LABEL_MAX 64
+
+/** @{ \name Normalization */
+
+/** Normalize a domain name into canonical form. This drops trailing
+ * dots and removes useless backslash escapes. */
+char *catta_normalize_name(const char *s, char *ret_s, size_t size);
+
+/** Normalize a domain name into canonical form. This drops trailing
+ * dots and removes useless backslash escapes. catta_free() the
+ * result! */
+char *catta_normalize_name_strdup(const char *s);
+
+/** @} */
+
+/** @{ \name Comparison */
+
+/** Return 1 when the specified domain names are equal, 0 otherwise */
+int catta_domain_equal(const char *a, const char *b);
+
+/** Return some kind of hash value for the domain, useful for using domains as hash table keys. */
+unsigned catta_domain_hash(const char *name);
+
+/** @} */
+
+/** @{ \name Escaping */
+
+/** Read the first label from the textual domain name *name, unescape
+ * it and write it to dest, *name is changed to point to the next label*/
+char *catta_unescape_label(const char **name, char *dest, size_t size);
+
+/** Escape the domain name in *src and write it to *ret_name */
+char *catta_escape_label(const char* src, size_t src_length, char **ret_name, size_t *ret_size);
+
+/** @} */
+
+/** @{ \name Validity Checks */
+
+/** Return 1 when the specified string contains a valid generic DNS-SD
+ * service type (i.e. a series of words starting with "_"), 0
+ * otherwise */
+int catta_is_valid_service_type_generic(const char *t);
+
+/** Return 1 when the specified string contains a valid strict DNS-SD
+ * service type (i.e. consisting of only two words, the latter being
+ * either _udp or _tcp), 0 otherwise */
+int catta_is_valid_service_type_strict(const char *t);
+
+/** Return 1 when the specified string contains a valid DNS-SD service
+ * subtype, 0 otherwise */
+int catta_is_valid_service_subtype(const char *t);
+
+/** Return 1 when the specified string contains a valid domain name, 0 otherwise */
+int catta_is_valid_domain_name(const char *t);
+
+/** Return 1 when the specified string contains a valid DNS-SD service name, 0 otherwise */
+int catta_is_valid_service_name(const char *t);
+
+/** Return 1 when the specified string contains a valid non-FQDN host name (i.e. without dots), 0 otherwise */
+int catta_is_valid_host_name(const char *t);
+
+/** Return 1 when the specified string contains a valid FQDN host name (i.e. with more than one label and non-numerical), 0 otherwise. \since 0.6.9 */
+int catta_is_valid_fqdn(const char *t);
+
+/** @} */
+
+/** @{ \name DNS-SD service name handling */
+
+/** Construct a valid complete DNS-SD service name from a name, a type and a domain */
+int catta_service_name_join(char *p, size_t size, const char *name, const char *type, const char *domain);
+
+/** Split a full service name into name, type and domain */
+int catta_service_name_split(const char *p, char *name, size_t name_size, char *type, size_t type_size, char *domain, size_t domain_size);
+
+/** @} */
+
+/** @{ \name DNS-SD Subtype handling */
+
+/** Return a pointer to the type section of a subtype i.e. _foo._sub._bar._tcp => _bar._tcp */
+const char *catta_get_type_from_subtype(const char *t);
+
+/** @} */
+
+CATTA_C_DECL_END
+
+#endif