/*
----------------------------------------------------------------------
 dns.h - Dynamic DNS update define
----------------------------------------------------------------------
 $Id: dns.h,v 1.2 2007/04/23 19:23:02 cnepveu Exp $
----------------------------------------------------------------------
Copyright (c) 2007 Hexago Inc. All rights reserved.

  LICENSE NOTICE: You may use and modify this source code only if you
  have executed a valid license agreement with Hexago Inc. granting
  you the right to do so, the said license agreement governing such
  use and modifications.   Copyright or other intellectual property
  notices are not to be removed from the source code.
---------------------------------------------------------------------------
*/

#ifndef _DNS_H_
#define _DNS_H_

#define DNS_UPDATE_PORT 	853
#define DNS16SZ 		2
#define DNS32SZ 		4

/*
 * RFC 1035 defines the maximum encoded name length as 255,
 * which means the ascii representation is limited to 253.
 */
#define DNS_NAME_SIZE 		253
#define DNS_LABEL_SIZE 		63
#define DNS_HEADER_SIZE 	12
#define DNS_BUFFER_SIZE 	512

/* The proxy-ddns will overwrite the TTL value */
#define DNS_DEFAULT_TTL 	3600

/* DNS opcode */
#define DNS_OPCODE_UPDATE 	5

/* DNS type */
#define DNS_TYPE_SOA 		6
#define DNS_TYPE_AAAA 		28
#define DNS_TYPE_AAAA_SIZE 	16
#define DNS_TYPE_ANY 		255

/* DNS class */
#define DNS_CLASS_IN 		1
#define DNS_CLASS_ANY 		255

typedef enum {
	DNS_RCODE_NOERROR 	= 0,
	DNS_RCODE_FORMERR	= 1,
	DNS_RCODE_SERVFAIL	= 2,
	DNS_RCODE_NXDOMAIN	= 3,
	DNS_RCODE_NOTIMP	= 4,
	DNS_RCODE_REFUSED	= 5,
	DNS_RCODE_YXDOMAIN	= 6,
	DNS_RCODE_YXRRSET	= 7,
	DNS_RCODE_NXRRSET	= 8,
	DNS_RCODE_NOTAUTH	= 9,
	DNS_RCODE_NOTZONE	= 10,
	DNS_RCODE_11		= 11,
	DNS_RCODE_12		= 12,
	DNS_RCODE_13		= 13,
	DNS_RCODE_14		= 14,
	DNS_RCODE_15		= 15
} tDNSRCode;

/* Public functions */
SOCKET DNSUpdateConnect(char *Server);
tDNSRCode DNSUpdateAddAAAA(SOCKET Socket, char *Name, char *Domain, char *AAAA);
tDNSRCode DNSUpdateDelRRSets(SOCKET Socket, char *Name, char *Domain);
int DNSUpdateClose(SOCKET Socket);

#endif /* _DNS_H_ */