xref: /titanic_41/usr/src/lib/smbsrv/libsmbns/common/smbns_dyndns.h (revision 3db3f65c6274eb042354801a308c8e9bc4994553)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _SMBSRV_DYNDNS_H
27 #define	_SMBSRV_DYNDNS_H
28 
29 #pragma ident	"%Z%%M%	%I%	%E% SMI"
30 
31 #include <smbsrv/libsmbns.h>
32 
33 /*
34  * Header section format:
35  *
36  * The header contains the following fields:
37  *
38  *                                     1  1  1  1  1  1
39  *       0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
40  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
41  *     |                      ID                       |
42  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
43  *     |QR|   Opcode  |AA|TC|RD|RA|   Z    |   RCODE   |
44  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
45  *     |                    QDCOUNT                    |
46  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
47  *     |                    ANCOUNT                    |
48  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
49  *     |                    NSCOUNT                    |
50  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
51  *     |                    ARCOUNT                    |
52  *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
53  *
54  * where:
55  *
56  * ID              A 16 bit identifier assigned by the program that
57  *                 generates any kind of query.  This identifier is copied
58  *                 the corresponding reply and can be used by the requester
59  *                 to match up replies to outstanding queries.
60  *
61  * QR              A one bit field that specifies whether this message is a
62  *                 query (0), or a response (1).
63  *
64  * OPCODE          A four bit field that specifies kind of query in this
65  *                 message.  This value is set by the originator of a query
66  *                 and copied into the response.  The values are:
67  *
68  *                 0               a standard query (QUERY)
69  *
70  *                 1               an inverse query (IQUERY)
71  *
72  *                 2               a server status request (STATUS)
73  *
74  *                 3-15            reserved for future use
75  *
76  * AA              Authoritative Answer - this bit is valid in responses,
77  *                 and specifies that the responding name server is an
78  *                 authority for the domain name in question section.
79  *
80  *                 Note that the contents of the answer section may have
81  *                 multiple owner names because of aliases.  The AA bit
82  *
83  *                 corresponds to the name which matches the query name, or
84  *                 the first owner name in the answer section.
85  *
86  * TC              TrunCation - specifies that this message was truncated
87  *                 due to length greater than that permitted on the
88  *                 transmission channel.
89  *
90  * RD              Recursion Desired - this bit may be set in a query and
91  *                 is copied into the response.  If RD is set, it directs
92  *                 the name server to pursue the query recursively.
93  *                 Recursive query support is optional.
94  *
95  * RA              Recursion Available - this be is set or cleared in a
96  *                 response, and denotes whether recursive query support is
97  *                 available in the name server.
98  *
99  * Z               Reserved for future use.  Must be zero in all queries
100  *                 and responses.
101  *
102  * RCODE           Response code - this 4 bit field is set as part of
103  *                 responses.  The values have the following
104  *                 interpretation:
105  *
106  *                 0               No error condition
107  *
108  *                 1               Format error - The name server was
109  *                                 unable to interpret the query.
110  *
111  *                 2               Server failure - The name server was
112  *                                 unable to process this query due to a
113  *                                 problem with the name server.
114  *
115  *                 3               Name Error - Meaningful only for
116  *                                 responses from an authoritative name
117  *                                 server, this code signifies that the
118  *                                 domain name referenced in the query does
119  *                                 not exist.
120  *
121  *                 4               Not Implemented - The name server does
122  *                                 not support the requested kind of query.
123  *
124  *                 5               Refused - The name server refuses to
125  *                                 perform the specified operation for
126  *                                 policy reasons.  For example, a name
127  *                                 server may not wish to provide the
128  *                                 information to the particular requester,
129  *                                 or a name server may not wish to perform
130  *                                 a particular operation (e.g., zone
131  *
132  *                                 transfer) for particular data.
133  *
134  *                 6-15            Reserved for future use.
135  *
136  * QDCOUNT         an unsigned 16 bit integer specifying the number of
137  *                 entries in the question section.
138  *
139  * ANCOUNT         an unsigned 16 bit integer specifying the number of
140  *                 resource records in the answer section.
141  *
142  * NSCOUNT         an unsigned 16 bit integer specifying the number of name
143  *                 server resource records in the authority records
144  *                 section.
145  *
146  * ARCOUNT         an unsigned 16 bit integer specifying the number of
147  *                 resource records in the additional records section.
148  */
149 
150 #include <sys/types.h>
151 
152 #ifdef __cplusplus
153 extern "C" {
154 #endif
155 
156 /* Other definitions: */
157 #define	REQ_QUERY	1	/* DNS query request */
158 #define	REQ_UPDATE	0	/* DNS update request */
159 #define	UPDATE_FORW	1	/* Update forward lookup zone */
160 #define	UPDATE_REV	0	/* Update reverse lookup zone */
161 #define	UPDATE_ADD	1	/* Update add request */
162 #define	UPDATE_DEL	0	/* Update remove request */
163 #define	MODE_GSS_API	3	/* Key negotiation mode */
164 
165 /* Max buffer size for send and receive buffer */
166 #define	MAX_BUF_SIZE	2000
167 #define	MAX_RETRIES	3	/* Max number of send retries if no response */
168 #define	TSIG_SIGNED	1	/* TSIG contains signed data */
169 #define	TSIG_UNSIGNED	0	/* TSIG does not conain signed data */
170 #define	DNS_CHECK	1	/* Check DNS for entry */
171 #define	DNS_NOCHECK	0	/* Don't check DNS for entry */
172 #define	MAX_TCP_SIZE 	2000	/* max tcp DNS message size */
173 
174 /* Delete 1 entry */
175 #define	DEL_ONE		1
176 /* Delete all entries of the same resource name */
177 #define	DEL_ALL		0
178 
179 #define	DNSF_RECUR_SUPP 0x80    /* Server can do recursive queries */
180 #define	DNSF_RECUR_QRY  0x100   /* Query is recursive */
181 
182 #define	BUFLEN_TCP(x, y) (MAX_TCP_SIZE-(x-y))
183 #define	BUFLEN_UDP(x, y) (NS_PACKETSZ-(x-y))
184 
185 /*
186  * DDNS_TTL is the time to live in DNS caches. Note that this
187  * does not affect the entry in the authoritative DNS database.
188  */
189 #define	DDNS_TTL	1200
190 
191 #ifdef __cplusplus
192 }
193 #endif
194 
195 #endif /* _SMBSRV_DYNDNS_H */
196