xref: /freebsd/contrib/unbound/edns-subnet/edns-subnet.h (revision e8d8bef961a50d4dc22501cde4fb9fb0be1b2532)
1 /*
2  * edns-subnet/edns-subnet.h - Subnet option related constants
3  *
4  * Copyright (c) 2013, NLnet Labs. All rights reserved.
5  *
6  * This software is open source.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * Neither the name of the NLNET LABS nor the names of its contributors may
20  * be used to endorse or promote products derived from this software without
21  * specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  */
35 /**
36  * \file
37  * Subnet option related constants.
38  */
39 
40 #include "util/net_help.h"
41 
42 #ifndef EDNSSUBNET_EDNSSUBNET_H
43 #define EDNSSUBNET_EDNSSUBNET_H
44 
45 /** In use by the edns subnet option code, as assigned by IANA */
46 #define EDNSSUBNET_ADDRFAM_IP4 1
47 #define EDNSSUBNET_ADDRFAM_IP6 2
48 
49 /**
50  * ECS option
51  */
52 struct ecs_data {
53 	uint16_t subnet_addr_fam;
54 	uint8_t subnet_source_mask;
55 	uint8_t subnet_scope_mask;
56 	uint8_t subnet_addr[INET6_SIZE];
57 	int subnet_validdata;
58 };
59 
60 /**
61  * copy the first n BITS from src to dst iff both src and dst
62  * are large enough, return 0 on succes
63  */
64 int
65 copy_clear(uint8_t* dst, size_t dstlen, uint8_t* src, size_t srclen, size_t n);
66 
67 #endif /* EDNSSUBNET_EDNSSUBNET_H */
68