smbns_dyndns.h revision dc20a3024900c47dd2ee44b9707e6df38f7d62a5
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SMBSRV_DYNDNS_H
#define _SMBSRV_DYNDNS_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <smbsrv/libsmbns.h>
/*
* Header section format:
*
* The header contains the following fields:
*
* 1 1 1 1 1 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | ID |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* |QR| Opcode |AA|TC|RD|RA| Z | RCODE |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | QDCOUNT |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | ANCOUNT |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | NSCOUNT |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | ARCOUNT |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
*
* where:
*
* ID A 16 bit identifier assigned by the program that
* generates any kind of query. This identifier is copied
* the corresponding reply and can be used by the requester
* to match up replies to outstanding queries.
*
* QR A one bit field that specifies whether this message is a
* query (0), or a response (1).
*
* OPCODE A four bit field that specifies kind of query in this
* message. This value is set by the originator of a query
* and copied into the response. The values are:
*
* 0 a standard query (QUERY)
*
* 1 an inverse query (IQUERY)
*
* 2 a server status request (STATUS)
*
* 3-15 reserved for future use
*
* AA Authoritative Answer - this bit is valid in responses,
* and specifies that the responding name server is an
* authority for the domain name in question section.
*
* Note that the contents of the answer section may have
* multiple owner names because of aliases. The AA bit
*
* corresponds to the name which matches the query name, or
* the first owner name in the answer section.
*
* TC TrunCation - specifies that this message was truncated
* due to length greater than that permitted on the
* transmission channel.
*
* RD Recursion Desired - this bit may be set in a query and
* is copied into the response. If RD is set, it directs
* the name server to pursue the query recursively.
* Recursive query support is optional.
*
* RA Recursion Available - this be is set or cleared in a
* response, and denotes whether recursive query support is
* available in the name server.
*
* Z Reserved for future use. Must be zero in all queries
* and responses.
*
* RCODE Response code - this 4 bit field is set as part of
* responses. The values have the following
* interpretation:
*
* 0 No error condition
*
* 1 Format error - The name server was
* unable to interpret the query.
*
* 2 Server failure - The name server was
* unable to process this query due to a
* problem with the name server.
*
* 3 Name Error - Meaningful only for
* responses from an authoritative name
* server, this code signifies that the
* domain name referenced in the query does
* not exist.
*
* 4 Not Implemented - The name server does
* not support the requested kind of query.
*
* 5 Refused - The name server refuses to
* perform the specified operation for
* policy reasons. For example, a name
* server may not wish to provide the
* information to the particular requester,
* or a name server may not wish to perform
* a particular operation (e.g., zone
*
* transfer) for particular data.
*
* 6-15 Reserved for future use.
*
* QDCOUNT an unsigned 16 bit integer specifying the number of
* entries in the question section.
*
* ANCOUNT an unsigned 16 bit integer specifying the number of
* resource records in the answer section.
*
* NSCOUNT an unsigned 16 bit integer specifying the number of name
* server resource records in the authority records
* section.
*
* ARCOUNT an unsigned 16 bit integer specifying the number of
* resource records in the additional records section.
*/
#ifdef __cplusplus
extern "C" {
#endif
/* Other definitions: */
#define REQ_UPDATE 0 /* DNS update request */
#define UPDATE_REV 0 /* Update reverse lookup zone */
#define UPDATE_DEL 0 /* Update remove request */
/* Max buffer size for send and receive buffer */
#define MAX_BUF_SIZE 2000
#define TSIG_UNSIGNED 0 /* TSIG does not conain signed data */
#define DNS_NOCHECK 0 /* Don't check DNS for entry */
/* Delete 1 entry */
#define DEL_ONE 1
/* Delete all entries of the same resource name */
#define DEL_ALL 0
#define BUFLEN_TCP(x, y) (MAX_TCP_SIZE-(x-y))
#define BUFLEN_UDP(x, y) (NS_PACKETSZ-(x-y))
extern int dns_get_msgid(void);
extern char *dyndns_get_nshort(char *, uint16_t *);
extern char *dyndns_get_int(char *, int *);
extern int dyndns_build_header(char **, int, uint16_t, int,
extern int dyndns_build_quest_zone(char **, int, char *, int, int);
int port);
extern int dyndns_udp_send_recv(int, char *, int, char *);
extern void dyndns_msg_err(int);
/*
* DDNS_TTL is the time to live in DNS caches. Note that this
* does not affect the entry in the authoritative DNS database.
*/
#define DDNS_TTL 1200
#ifdef __cplusplus
}
#endif
#endif /* _SMBSRV_DYNDNS_H */