Home | History | Annotate | Line # | Download | only in edns-subnet 
      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 success
     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