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 */
52struct 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 success
63 */
64int
65copy_clear(uint8_t* dst, size_t dstlen, uint8_t* src, size_t srclen, size_t n);
66
67#endif /* EDNSSUBNET_EDNSSUBNET_H */
68