add

lib/dns/include/dns/fixedname.h

+/*
+ * Copyright (C) 1999  Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#ifndef DNS_FIXEDNAME_H
+#define DNS_FIXEDNAME_H 1
+
+/*****
+ ***** Module Info
+ *****/
+
+/*
+ * Fixed-size Names
+ *
+ * dns_fixedname_t is a convenience type containing a name, an offsets table,
+ * and a dedicated buffer big enough for the longest possible name.
+ *
+ * MP:
+ *	The caller must ensure any required synchronization.
+ *
+ * Reliability:
+ *	No anticipated impact.
+ *
+ * Resources:
+ *	Per dns_fixedname_t:
+ *		sizeof(dns_name_t) + sizeof(dns_offsets_t) +
+ *		sizeof(isc_buffer_t) + 255 bytes + structure padding
+ *
+ * Security:
+ *	No anticipated impact.
+ *
+ * Standards:
+ *	None.
+ */
+
+/*****
+ ***** Imports
+ *****/
+
+#include <isc/buffer.h>
+#include <isc/lang.h>
+
+#include <dns/types.h>
+#include <dns/name.h>
+#include <dns/result.h>
+
+ISC_LANG_BEGINDECLS
+
+/*****
+ ***** Types
+ *****/
+
+typedef struct dns_fixedname {
+	dns_name_t	name;
+	dns_offsets_t	offsets;
+	isc_buffer_t	buffer;
+	unsigned char	data[255];
+} dns_fixedname_t;
+
+#define dns_fixedname_init(fn) \
+	do { \
+		dns_name_init(&((fn)->name), (fn)->offsets); \
+		isc_buffer_init(&((fn)->buffer), (fn)->data, 255, \
+				ISC_BUFFERTYPE_BINARY); \
+		dns_name_setbuffer(&((fn)->name), &((fn)->buffer)); \
+	} while (0)
+
+#define dns_fixedname_invalidate(fn) \
+	dns_name_invalidate(&((fn)->name))
+
+ISC_LANG_ENDDECLS
+
+#endif /* DNS_FIXEDNAME_H */