| 1 | /*
|
|---|
| 2 | * Copyright (c) 2012 Jiri Svoboda
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup dnsrsrv
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /**
|
|---|
| 33 | * @file DNS Standard definitions.
|
|---|
| 34 | *
|
|---|
| 35 | * From RFC 1035 Domain Names - Implementation and Specification
|
|---|
| 36 | */
|
|---|
| 37 |
|
|---|
| 38 | #ifndef DNS_STD_H
|
|---|
| 39 | #define DNS_STD_H
|
|---|
| 40 |
|
|---|
| 41 | #include <stdint.h>
|
|---|
| 42 |
|
|---|
| 43 | /** From 2.3.4. Size Limits */
|
|---|
| 44 | enum dns_limits {
|
|---|
| 45 | DNS_LABEL_MAX_SIZE = 63,
|
|---|
| 46 | DNS_NAME_MAX_SIZE = 255,
|
|---|
| 47 | DNS_UDP_MSG_MAX_SIZE = 512
|
|---|
| 48 | };
|
|---|
| 49 |
|
|---|
| 50 | typedef enum dns_qtype {
|
|---|
| 51 | DTYPE_A = 1,
|
|---|
| 52 | DTYPE_NS = 2,
|
|---|
| 53 | DTYPE_MD = 3,
|
|---|
| 54 | DTYPE_MF = 4,
|
|---|
| 55 | DTYPE_CNAME = 5,
|
|---|
| 56 | DTYPE_SOA = 6,
|
|---|
| 57 | DTYPE_MB = 7,
|
|---|
| 58 | DTYPE_MG = 8,
|
|---|
| 59 | DTYPE_MR = 9,
|
|---|
| 60 | DTYPE_NULL = 10,
|
|---|
| 61 | DTYPE_WKS = 11,
|
|---|
| 62 | DTYPE_PTR = 12,
|
|---|
| 63 | DTYPE_HINFO = 13,
|
|---|
| 64 | DTYPE_MINFO = 14,
|
|---|
| 65 | DTYPE_MX = 15,
|
|---|
| 66 | DTYPE_TXT = 16,
|
|---|
| 67 | DTYPE_AAAA = 28,
|
|---|
| 68 | DQTYPE_AXFR = 252,
|
|---|
| 69 | DQTYPE_MAILB = 253,
|
|---|
| 70 | DQTYPE_MAILA = 254,
|
|---|
| 71 | DQTYPE_ALL = 255
|
|---|
| 72 | } dns_type_t, dns_qtype_t;
|
|---|
| 73 |
|
|---|
| 74 | typedef enum dns_qclass {
|
|---|
| 75 | /** Internet */
|
|---|
| 76 | DC_IN = 1,
|
|---|
| 77 | /** CSNET */
|
|---|
| 78 | DC_CS = 2,
|
|---|
| 79 | /** CHAOS */
|
|---|
| 80 | DC_CH = 3,
|
|---|
| 81 | /** Hesiod */
|
|---|
| 82 | DC_HS = 4,
|
|---|
| 83 | /** Any class */
|
|---|
| 84 | DQC_ANY = 255
|
|---|
| 85 | } dns_class_t, dns_qclass_t;
|
|---|
| 86 |
|
|---|
| 87 | typedef struct {
|
|---|
| 88 | /** Identifier assigned by the query originator */
|
|---|
| 89 | uint16_t id;
|
|---|
| 90 | /** QR, Opcode, AA, TC,RD, RA, Z, Rcode */
|
|---|
| 91 | uint16_t opbits;
|
|---|
| 92 | /** Number of entries in query section */
|
|---|
| 93 | uint16_t qd_count;
|
|---|
| 94 | /** Number of RRs in the answer section */
|
|---|
| 95 | uint16_t an_count;
|
|---|
| 96 | /** Number of name server RRs in the authority records section */
|
|---|
| 97 | uint16_t ns_count;
|
|---|
| 98 | /** Number of RRs in the additional records section */
|
|---|
| 99 | uint16_t ar_count;
|
|---|
| 100 | } dns_header_t;
|
|---|
| 101 |
|
|---|
| 102 | /** Bits in dns_header_t.opbits.
|
|---|
| 103 | *
|
|---|
| 104 | * Note that bit numbers in RFC 1035 are reversed (0 is the most significant)
|
|---|
| 105 | * but we use the standard notation (0 is the least significant).
|
|---|
| 106 | */
|
|---|
| 107 | enum dns_opbits {
|
|---|
| 108 | OPB_QR = 15,
|
|---|
| 109 | OPB_OPCODE_h = 14,
|
|---|
| 110 | OPB_OPCODE_l = 11,
|
|---|
| 111 | OPB_AA = 10,
|
|---|
| 112 | OPB_TC = 9,
|
|---|
| 113 | OPB_RD = 8,
|
|---|
| 114 | OPB_RA = 7,
|
|---|
| 115 | OPB_Z_h = 6,
|
|---|
| 116 | OPB_Z_l = 4,
|
|---|
| 117 | OPB_RCODE_h = 3,
|
|---|
| 118 | OPB_RCODE_l = 0
|
|---|
| 119 | };
|
|---|
| 120 |
|
|---|
| 121 | typedef enum dns_query_response {
|
|---|
| 122 | QR_QUERY = 0,
|
|---|
| 123 | QR_RESPONSE = 1
|
|---|
| 124 | } dns_query_response_t;
|
|---|
| 125 |
|
|---|
| 126 | typedef enum dns_opcode {
|
|---|
| 127 | OPC_QUERY = 0,
|
|---|
| 128 | OPC_IQUERY = 1,
|
|---|
| 129 | OPC_STATUS = 2
|
|---|
| 130 | } dns_opcode_t;
|
|---|
| 131 |
|
|---|
| 132 | typedef enum dns_rcode {
|
|---|
| 133 | RC_OK = 0,
|
|---|
| 134 | RC_FMT_ERR = 1,
|
|---|
| 135 | RC_SRV_FAIL = 2,
|
|---|
| 136 | RC_NAME_ERR = 3,
|
|---|
| 137 | RC_NOT_IMPL = 4,
|
|---|
| 138 | RC_REFUSED = 5
|
|---|
| 139 | } dns_rcode_t;
|
|---|
| 140 |
|
|---|
| 141 | #endif
|
|---|
| 142 |
|
|---|
| 143 | /** @}
|
|---|
| 144 | */
|
|---|
